1 Changes in version 0.4.6.10 - 2022-02-04
2 This version contains minor bugfixes but one in particular is that relays
3 don't advertise onion service v2 support at the protocol version level.
5 o Minor features (fallbackdir):
6 - Regenerate fallback directories generated on February 04, 2022.
8 o Minor features (geoip data):
9 - Update the geoip files to match the IPFire Location Database, as
10 retrieved on 2022/02/04.
12 o Minor bugfix (logging):
13 - Update a log notice dead URL to a working one. Fixes bug 40544;
14 bugfix on 0.3.5.1-alpha.
16 o Minor bugfix (relay):
17 - Remove the HSDir and HSIntro onion service v2 protocol versions so
18 relay stop advertising that they support them. Fixes bug 40509;
21 o Minor bugfixes (MetricsPort, Prometheus):
22 - Add double quotes to the label values of the onion service
23 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
26 Changes in version 0.4.5.12 - 2022-02-04
27 This version contains mostly minor bugfixes for which you can find the
28 details below. The previous release (0.4.5.11) was suppose to update the
29 GeoIP and fallbackdir lists but a problem in our release pipeline prevented
30 those files to be updated correctly. Thus, this release regenerates up to
31 date lists. Furthermore, another fix to highlight is that relays don't
32 advertise onion service v2 support at the protocol version level.
34 o Minor feature (reproducible build):
35 - The repository can now build reproducible tarballs which adds the
36 build command "make dist-reprod" for that purpose. Closes
39 o Minor features (compilation):
40 - Give an error message if trying to build with a version of
41 LibreSSL known not to work with Tor. (There's an incompatibility
42 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
43 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
46 o Minor features (fallbackdir):
47 - Regenerate fallback directories generated on February 04, 2022.
49 o Minor features (geoip data):
50 - Update the geoip files to match the IPFire Location Database, as
51 retrieved on 2022/02/04.
53 o Minor bugfix (logging):
54 - Update a log notice dead URL to a working one. Fixes bug 40544;
55 bugfix on 0.3.5.1-alpha.
57 o Minor bugfix (relay):
58 - Remove the HSDir and HSIntro onion service v2 protocol versions so
59 relay stop advertising that they support them. Fixes bug 40509;
62 o Minor bugfixes (compilation):
63 - Fix a compilation error when trying to build Tor with a compiler
64 that does not support expanding statitically initialized const
65 values in macro's. Fixes bug 40410; bugfix on 0.4.5.1-alpha
66 - Fix our configuration logic to detect whether we had OpenSSL 3:
67 previously, our logic was reversed. This has no other effect than
68 to change whether we suppress deprecated API warnings. Fixes bug
69 40429; bugfix on 0.3.5.13.
71 o Minor bugfixes (MetricsPort, Prometheus):
72 - Add double quotes to the label values of the onion service
73 metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
75 o Minor bugfixes (relay):
76 - Reject IPv6-only DirPorts. Our reachability self-test forces
77 DirPorts to be IPv4, but our configuration parser allowed them to
78 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
79 bugfix on 0.4.5.1-alpha.
81 Changes in version 0.4.7.3-alpha - 2021-12-15
82 This third alpha release of the 0.4.7.x series fixes several bugs including
83 two major ones affecting Bridges and Relays (see below). If you are running
84 an earlier 0.4.7.x version, you should upgrade to this version.
86 o Major bugfixes (bridges):
87 - Make Tor work reliably again when you have multiple bridges
88 configured and one or more of them are unreachable. The problem
89 came because we require that we have bridge descriptors for both
90 of our first two bridges (else we refuse to try to connect), but
91 in some cases we would wait three hours before trying to fetch
92 these missing descriptors, and/or never recover when we do try to
93 fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
96 o Major bugfixes (relay, overload):
97 - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
98 order to indicate that this was a DNS timeout from tor perspective
99 and not the DNS server itself.
100 - Deprecate overload_dns_timeout_period_secs and
101 overload_dns_timeout_scale_percent consensus parameters as well.
102 They were used to assess the overload state which is no more now.
103 - Don't make Tor DNS timeout trigger an overload general state.
104 These timeouts are different from DNS server timeout. They have to
105 be seen as timeout related to UX and not because of a network
106 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
108 o Minor feature (reproducible build):
109 - The repository can now build reproducible tarballs which adds the
110 build command "make dist-reprod" for that purpose. Closes
113 o Minor features (compilation):
114 - Give an error message if trying to build with a version of
115 LibreSSL known not to work with Tor. (There's an incompatibility
116 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
117 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
120 o Minor features (fallbackdir):
121 - Regenerate fallback directories generated on December 15, 2021.
123 o Minor features (geoip data):
124 - Update the geoip files to match the IPFire Location Database, as
125 retrieved on 2021/12/15.
127 o Minor features (portability):
128 - Try to prevent a compiler warning about printf arguments that
129 could sometimes occur on MSYS2 depending on the configuration.
132 o Minor bugfix (pluggable transport):
133 - Do not kill a managed proxy if one of its transport configurations
134 emits a method error. Instead log a warning and continue processing
135 method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
137 o Minor bugfixes (bridges):
138 - When we don't yet have a descriptor for one of our bridges,
139 disable the entry guard retry schedule on that bridge. The entry
140 guard retry schedule and the bridge descriptor retry schedule can
141 conflict, e.g. where we mark a bridge as "maybe up" yet we don't
142 try to fetch its descriptor yet, leading Tor to wait (refusing to
143 do anything) until it becomes time to fetch the descriptor. Fixes
144 bug 40497; bugfix on 0.3.0.3-alpha.
146 o Minor bugfixes (compilation):
147 - Fix our configuration logic to detect whether we had OpenSSL 3:
148 previously, our logic was reversed. This has no other effect than
149 to change whether we suppress deprecated API warnings. Fixes bug
150 40429; bugfix on 0.3.5.13.
152 o Minor bugfixes (controller, path bias):
153 - When a circuit's path is specified, in full or in part, from the
154 controller API, do not count that circuit towards our path-bias
155 calculations. (Doing so was incorrect, since we cannot tell
156 whether the controller is selecting relays randomly.) Resolves a
157 "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
159 o Minor bugfixes (logging):
160 - When we no longer have enough directory information to use the
161 network, we would log a notice-level message -- but we would not
162 reliably log a message when we recovered and resumed using the
163 network. Now make sure there is always a corresponding message
164 about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
166 o Minor bugfixes (performance, DoS):
167 - Fix one case of a not-especially viable denial-of-service attack
168 found by OSS-Fuzz in our consensus-diff parsing code. This attack
169 causes a lot small of memory allocations and then immediately
170 frees them: this is only slow when running with all the sanitizers
171 enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
173 o Minor bugfixes (relay):
174 - Reject IPv6-only DirPorts. Our reachability self-test forces
175 DirPorts to be IPv4, but our configuration parser allowed them to
176 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
177 bugfix on 0.4.5.1-alpha.
179 o Minor bugfixes (sandbox):
180 - Fix the sandbox on i386 by modifying it to allow the
181 "clock_gettime64" and "statx" system calls and to filter the
182 "chown32" and "stat64" system calls in place of "chown" and
183 "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
185 o Documentation (man, relay):
186 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
187 bugfix on 0.4.6.1-alpha.
189 Changes in version 0.4.6.9 - 2021-12-15
190 This version fixes several bugs from earlier versions of Tor. One important
191 piece is the removal of DNS timeout metric from the overload general signal.
192 See below for more details.
194 o Major bugfixes (relay, overload):
195 - Don't make Tor DNS timeout trigger an overload general state.
196 These timeouts are different from DNS server timeout. They have to
197 be seen as timeout related to UX and not because of a network
198 problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
200 o Minor feature (reproducible build):
201 - The repository can now build reproducible tarballs which adds the
202 build command "make dist-reprod" for that purpose. Closes
205 o Minor features (compilation):
206 - Give an error message if trying to build with a version of
207 LibreSSL known not to work with Tor. (There's an incompatibility
208 with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
209 their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
212 o Minor features (fallbackdir):
213 - Regenerate fallback directories generated on December 15, 2021.
215 o Minor features (geoip data):
216 - Update the geoip files to match the IPFire Location Database, as
217 retrieved on 2021/12/15.
219 o Minor bugfixes (compilation):
220 - Fix our configuration logic to detect whether we had OpenSSL 3:
221 previously, our logic was reversed. This has no other effect than
222 to change whether we suppress deprecated API warnings. Fixes bug
223 40429; bugfix on 0.3.5.13.
225 o Minor bugfixes (relay):
226 - Reject IPv6-only DirPorts. Our reachability self-test forces
227 DirPorts to be IPv4, but our configuration parser allowed them to
228 be IPv6-only, which led to an assertion failure. Fixes bug 40494;
229 bugfix on 0.4.5.1-alpha.
231 o Documentation (man, relay):
232 - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
233 bugfix on 0.4.6.1-alpha.
236 Changes in version 0.4.7.2-alpha - 2021-10-26
237 This second alpha release of the 0.4.7.x series adds two major
238 features: congestion control (prop324) for network performance, and
239 the MiddleOnly flag (prop335) voted by the authorities to pin relays
240 to the middle position for various network health reasons. This
241 release also fixes numerous bugs.
243 The congestion control feature, detailed in proposal 324, still needs
244 more work before we can enable it by default. It is currently in its
245 testing and tuning phase which means that you should expect more
246 0.4.7.x alphas as congestion control gets stabilized and tuned for
247 optimal performance. And so, at this release, it can not be used
248 without a custom patch.
250 o Major features (congestion control):
251 - Implement support for flow control over congestion controlled
252 circuits. This work comes from proposal 324. Closes ticket 40450.
254 o Major features (directory authority):
255 - Add a new consensus method to handle MiddleOnly specially. When
256 enough authorities are using this method, then any relay tagged
257 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
258 V2Dir flags automatically cleared, and will have its BadExit flag
259 automatically set. Implements part of proposal 335.
260 - Authorities can now be configured to label relays as "MiddleOnly".
261 When voting for this flag, authorities automatically vote against
262 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
263 part of proposal 335. Based on a patch from Neel Chauhan.
265 o Major bugfix (relay, metrics):
266 - On the MetricsPort, the DNS error statistics are not reported by
267 record type ("record=...") anymore due to a libevent bug
268 (https://github.com/libevent/libevent/issues/1219). Fixes bug
269 40490; bugfix on 0.4.7.1-alpha.
271 o Major bugfixes (relay, overload state):
272 - Relays report the general overload state for DNS timeout errors
273 only if X% of all DNS queries over Y seconds are errors. Before
274 that, it only took 1 timeout to report the overload state which
275 was just too low of a threshold. The X and Y values are 1% and 10
276 minutes respectively but they are also controlled by consensus
277 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
279 o Minor feature (authority, relay):
280 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
281 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
283 o Minor feature (onion service v2):
284 - Onion service v2 addresses are now not recognized anymore by tor
285 meaning a bad hostname is returned when attempting to pass it on a
286 SOCKS connection. No more deprecation log is emitted client side.
288 - See https://blog.torproject.org/v2-deprecation-timeline for
289 details on how to transition from v2 to v3.
291 o Minor features (fallbackdir):
292 - Regenerate fallback directories for October 2021. Closes
295 o Minor features (logging, heartbeat):
296 - When a relay receives a cell that isn't encrypted properly for it,
297 but the relay is the last hop on the circuit, the relay now counts
298 how many cells of this kind it receives, on how many circuits, and
299 reports this information in the log. Previously, we'd log each
300 cell at PROTOCOL_WARN level, which is far too verbose to be
301 useful. Fixes part of ticket 40400.
303 o Minor features (testing):
304 - We now have separate fuzzers for the inner layers of v3 onion
305 service descriptors, to prevent future bugs like 40392. Closes
308 o Minor bugfixes (compilation):
309 - Fix compilation error when __NR_time is not defined. Fixes bug
310 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
312 o Minor bugfixes (dirauth, bandwidth scanner):
313 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
314 to avoid voting on bandwidth scanner weights to v3 directory
315 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
318 o Minor bugfixes (fragile-hardening, sandbox):
319 - When building with --enable-fragile-hardening, add or relax Linux
320 seccomp rules to allow AddressSanitizer to execute normally if the
321 process terminates with the sandbox active. This has the side
322 effect of disabling the filtering of file- and directory-open
323 requests on most systems and dilutes the effectiveness of the
324 sandbox overall, as a wider range of system calls must be
325 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
327 o Minor bugfixes (logging):
328 - If a channel has never received or transmitted a cell, or seen a
329 client, do not calculate time diffs against 1/1/1970 but log a
330 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
332 o Minor bugfixes (onion service):
333 - Fix a warning BUG that would occur often on heavily loaded onion
334 service leading to filling the logs with useless warnings. Fixes
335 bug 34083; bugfix on 0.3.2.1-alpha.
337 o Minor bugfix (CI, onion service):
338 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
339 bugfix on 0.3.2.1-alpha.
341 o Minor bugfixes (onion service, config):
342 - Fix a memory leak for a small config line string that could occur
343 if the onion service failed to be configured from file properly.
344 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
346 o Minor bugfixes (onion service, TROVE-2021-008):
347 - Only log v2 access attempts once total, in order to not pollute
348 the logs with warnings and to avoid recording the times on disk
349 when v2 access was attempted. Note that the onion address was
350 _never_ logged. This counts as a Low-severity security issue.
351 Fixes bug 40474; bugfix on 0.4.5.8.
352 - Note that due to #40476 which removes v2 support entirely, this
353 log line is not emitted anymore. We still mention this in the
354 changelog because it is a Low-severity TROVE.
356 o Minor bugfixes (usability):
357 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
358 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
359 happen naturally if a client gives up on a rendezvous circuit
360 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
362 - Do not log "circuit_receive_relay_cell failed" at
363 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
364 would want to log this as a protocol warning, we are already
365 logging another warning from inside circuit_receive_relay_cell.
366 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
368 o Code simplification and refactoring:
369 - Lower the official maximum for "guard-extreme-restriction-percent"
370 to 100. This has no effect on when the guard code will generate a
371 warning, but it makes the intent of the option clearer. Fixes bug
372 40486; bugfix on 0.3.0.1-alpha.
375 - Add unit tests for the Linux seccomp sandbox. Resolves
378 o Code simplification and refactoring (rust):
379 - Remove Rust support and its associated code. It is unsupported and
380 Rust focus should be shifted to arti. Closes ticket 40469.
382 o Testing (CI, chutney):
383 - Bump the data size that chutney transmits to 5MBytes in order to
384 trigger the flow control and congestion window code. Closes
388 Changes in version 0.4.6.8 - 2021-10-26
389 This version fixes several bugs from earlier versions of Tor. One
390 highlight is a fix on how we track DNS timeouts to report general
393 o Major bugfixes (relay, overload state):
394 - Relays report the general overload state for DNS timeout errors
395 only if X% of all DNS queries over Y seconds are errors. Before
396 that, it only took 1 timeout to report the overload state which
397 was just too low of a threshold. The X and Y values are 1% and 10
398 minutes respectively but they are also controlled by consensus
399 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
401 o Minor features (fallbackdir):
402 - Regenerate fallback directories for October 2021. Closes
405 o Minor features (testing):
406 - On a testing network, relays can now use the
407 TestingMinTimeToReportBandwidth option to change the smallest
408 amount of time over which they're willing to report their observed
409 maximum bandwidth. Previously, this was fixed at 1 day. For
410 safety, values under 2 hours are only supported on testing
411 networks. Part of a fix for ticket 40337.
412 - Relays on testing networks no longer rate-limit how frequently
413 they are willing to report new bandwidth measurements. Part of a
414 fix for ticket 40337.
415 - Relays on testing networks now report their observed bandwidths
416 immediately from startup. Previously, they waited until they had
417 been running for a full day. Closes ticket 40337.
419 o Minor bugfix (onion service):
420 - Do not flag an HSDir as non-running in case the descriptor upload
421 or fetch fails. An onion service closes pending directory
422 connections before uploading a new descriptor which can thus lead
423 to wrongly flagging many relays and thus affecting circuit building
424 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
425 - Improve logging when a bad HS version is given. Fixes bug 40476;
426 bugfix on 0.4.6.1-alpha.
428 o Minor bugfix (CI, onion service):
429 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
430 bugfix on 0.3.2.1-alpha.
432 o Minor bugfixes (compatibility):
433 - Fix compatibility with the most recent Libevent versions, which no
434 longer have an evdns_set_random_bytes() function. Because this
435 function has been a no-op since Libevent 2.0.4-alpha, it is safe
436 for us to just stop calling it. Fixes bug 40371; bugfix
439 o Minor bugfixes (onion service, TROVE-2021-008):
440 - Only log v2 access attempts once total, in order to not pollute
441 the logs with warnings and to avoid recording the times on disk
442 when v2 access was attempted. Note that the onion address was
443 _never_ logged. This counts as a Low-severity security issue.
444 Fixes bug 40474; bugfix on 0.4.5.8.
447 Changes in version 0.4.5.11 - 2021-10-26
448 The major change in this version is that v2 onion services are now
449 disabled at the client, service, and relay: any Tor nodes running this
450 version and onward will stop supporting v2 onion services. This is the
451 last step in the long deprecation process of v2 onion services.
452 Everyone running an earlier version, whether as a client, a relay, or
453 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
456 o Major feature (onion service v2):
457 - See https://blog.torproject.org/v2-deprecation-timeline for
458 details on how to transition from v2 to v3.
459 - The control port commands HSFETCH and HSPOST no longer allow
460 version 2, and it is no longer possible to create a v2 service
462 - Tor no longer allows creating v2 services, or connecting as a
463 client to a v2 service. Relays will decline to be a v2 HSDir or
464 introduction point. This effectively disables onion service
465 version 2 Tor-wide. Closes ticket 40476.
467 o Minor features (bridge, backport from 0.4.6.8):
468 - We now announce the URL to Tor's new bridge status at
469 https://bridges.torproject.org/ when Tor is configured to run as a
470 bridge relay. Closes ticket 30477.
472 o Minor features (fallbackdir):
473 - Regenerate fallback directories for October 2021. Closes
476 o Minor features (logging, diagnostic, backport from 0.4.6.5):
477 - Log decompression failures at a higher severity level, since they
478 can help provide missing context for other warning messages. We
479 rate-limit these messages, to avoid flooding the logs if they
480 begin to occur frequently. Closes ticket 40175.
482 o Minor features (testing, backport from 0.4.6.8):
483 - On a testing network, relays can now use the
484 TestingMinTimeToReportBandwidth option to change the smallest
485 amount of time over which they're willing to report their observed
486 maximum bandwidth. Previously, this was fixed at 1 day. For
487 safety, values under 2 hours are only supported on testing
488 networks. Part of a fix for ticket 40337.
489 - Relays on testing networks no longer rate-limit how frequently
490 they are willing to report new bandwidth measurements. Part of a
491 fix for ticket 40337.
492 - Relays on testing networks now report their observed bandwidths
493 immediately from startup. Previously, they waited until they had
494 been running for a full day. Closes ticket 40337.
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 bugfix (onion service, backport from 0.4.6.8):
501 - Do not flag an HSDir as non-running in case the descriptor upload
502 or fetch fails. An onion service closes pending directory
503 connections before uploading a new descriptor which can thus lead
504 to wrongly flagging many relays and thus affecting circuit building
505 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
507 o Minor bugfixes (compatibility, backport from 0.4.6.8):
508 - Fix compatibility with the most recent Libevent versions, which no
509 longer have an evdns_set_random_bytes() function. Because this
510 function has been a no-op since Libevent 2.0.4-alpha, it is safe
511 for us to just stop calling it. Fixes bug 40371; bugfix
514 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
515 - Avoid a set of bugs that could be caused by inconsistently
516 preferring an out-of-date consensus stored in a stale directory
517 cache over a more recent one stored on disk as the latest
518 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
520 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
521 - Only log v2 access attempts once total, in order to not pollute
522 the logs with warnings and to avoid recording the times on disk
523 when v2 access was attempted. Note that the onion address was
524 _never_ logged. This counts as a Low-severity security issue.
525 Fixes bug 40474; bugfix on 0.4.5.8.
528 Changes in version 0.3.5.17 - 2021-10-26
529 The major change in this version is that v2 onion services are now
530 disabled at the client, service, and relay: any Tor nodes running this
531 version and onward will stop supporting v2 onion services. This is the
532 last step in the long deprecation process of v2 onion services.
533 Everyone running an earlier version, whether as a client, a relay, or
534 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
537 o Major feature (onion service v2, backport from 0.4.5.11):
538 - See https://blog.torproject.org/v2-deprecation-timeline for
539 details on how to transition from v2 to v3.
540 - The control port commands HSFETCH and HSPOST no longer allow
541 version 2, and it is no longer possible to create a v2 service
543 - Tor no longer allows creating v2 services, or connecting as a
544 client to a v2 service. Relays will decline to be a v2 HSDir or
545 introduction point. This effectively disables onion service
546 version 2 Tor-wide. Closes ticket 40476.
548 o Minor features (bridge, backport from 0.4.6.8):
549 - We now announce the URL to Tor's new bridge status at
550 https://bridges.torproject.org/ when Tor is configured to run as a
551 bridge relay. Closes ticket 30477.
553 o Minor features (fallbackdir):
554 - Regenerate fallback directories for October 2021. Closes
557 o Minor bugfixes (compatibility, backport from 0.4.6.8):
558 - Fix compatibility with the most recent Libevent versions, which no
559 longer have an evdns_set_random_bytes() function. Because this
560 function has been a no-op since Libevent 2.0.4-alpha, it is safe
561 for us to just stop calling it. Fixes bug 40371; bugfix
565 Changes in version 0.4.7.1-alpha - 2021-09-17
566 This version is the first alpha release of the 0.4.7.x series. One
567 major feature is Vanguards Lite, from proposal 333, to help mitigate
568 guard discovery attacks against onion services. It also includes
571 o Major features (Proposal 332, onion services, guard selection algorithm):
572 - Clients and onion services now choose four long-lived "layer 2"
573 guard relays for use as the middle hop in all onion circuits.
574 These relays are kept in place for a randomized duration averaging
575 1 week. This mitigates guard discovery attacks against clients and
576 short-lived onion services such as OnionShare. Long-lived onion
577 services that need high security should still use the Vanguards
578 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
579 40363; implements proposal 333.
581 o Minor features (bridge testing support):
582 - Let external bridge reachability testing tools discard cached
583 bridge descriptors when setting new bridges, so they can be sure
584 to get a clean reachability test. Implements ticket 40209.
586 o Minor features (fuzzing):
587 - When building with --enable-libfuzzer, use a set of compiler flags
588 that works with more recent versions of the library. Previously we
589 were using a set of flags from 2017. Closes ticket 40407.
591 o Minor features (testing configuration):
592 - When TestingTorNetwork is enabled, skip the permissions check on
593 hidden service directories. Closes ticket 40338.
594 - On a testing network, relays can now use the
595 TestingMinTimeToReportBandwidth option to change the smallest
596 amount of time over which they're willing to report their observed
597 maximum bandwidth. Previously, this was fixed at 1 day. For
598 safety, values under 2 hours are only supported on testing
599 networks. Part of a fix for ticket 40337.
600 - Relays on testing networks no longer rate-limit how frequently
601 they are willing to report new bandwidth measurements. Part of a
602 fix for ticket 40337.
603 - Relays on testing networks now report their observed bandwidths
604 immediately from startup. Previously, they waited until they had
605 been running for a full day. Closes ticket 40337.
607 o Minor bugfixes (circuit padding):
608 - Don't send STOP circuit padding cells when the other side has
609 already shut down the corresponding padding machine. Fixes bug
610 40435; bugfix on 0.4.0.1-alpha.
612 o Minor bugfixes (compatibility):
613 - Fix compatibility with the most recent Libevent versions, which no
614 longer have an evdns_set_random_bytes() function. Because this
615 function has been a no-op since Libevent 2.0.4-alpha, it is safe
616 for us to just stop calling it. Fixes bug 40371; bugfix
619 o Minor bugfixes (control, sandbox):
620 - Allows the control command SAVECONF to succeed when the seccomp
621 sandbox is enabled. Makes SAVECONF keep only one backup file, to
622 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
623 Patch by Daniel Pinto.
625 o Minor bugfixes (heartbeat):
626 - Adjust the heartbeat log message about distinct clients to
627 consider the HeartbeatPeriod rather than a flat 6-hour delay.
628 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
630 o Minor bugfixes (logging, relay):
631 - Add spaces between the "and" when logging the "Your server has not
632 managed to confirm reachability for its" on dual-stack relays.
633 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
635 o Minor bugfixes (onion service):
636 - Do not flag an HSDir as non-running in case the descriptor upload
637 or fetch fails. An onion service closes pending directory
638 connections before uploading a new descriptor which leads to
639 wrongly flagging many relays and thus affecting circuit path
640 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
642 o Minor bugfixes (statistics):
643 - Fix a fencepost issue when we check stability_last_downrated where
644 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
645 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
647 o Minor bugfixes (tests):
648 - Fix a bug that prevented some tests from running with the correct
649 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
652 - Add links to original tor design paper and anonbib to
653 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
655 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
656 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
659 Changes in version 0.4.6.7 - 2021-08-16
660 This version fixes several bugs from earlier versions of Tor,
661 including one that could lead to a denial-of-service attack. Everyone
662 running an earlier version, whether as a client, a relay, or an onion
663 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
665 o Major bugfixes (cryptography, security):
666 - Resolve an assertion failure caused by a behavior mismatch between
667 our batch-signature verification code and our single-signature
668 verification code. This assertion failure could be triggered
669 remotely, leading to a denial of service attack. We fix this issue
670 by disabling batch verification. Fixes bug 40078; bugfix on
671 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
672 CVE-2021-38385. Found by Henry de Valence.
674 o Minor feature (fallbackdir):
675 - Regenerate fallback directories list. Close ticket 40447.
677 o Minor features (geoip data):
678 - Update the geoip files to match the IPFire Location Database, as
679 retrieved on 2021/08/12.
681 o Minor bugfix (crypto):
682 - Disable the unused batch verification feature of ed25519-donna.
683 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
686 o Minor bugfixes (onion service):
687 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
688 Address) for a v2 onion address. Fixes bug 40421; bugfix
691 o Minor bugfixes (relay):
692 - Reduce the compression level for data streaming from HIGH to LOW
693 in order to reduce CPU load on the directory relays. Fixes bug
694 40301; bugfix on 0.3.5.1-alpha.
696 o Minor bugfixes (timekeeping):
697 - Calculate the time of day correctly on systems where the time_t
698 type includes leap seconds. (This is not the case on most
699 operating systems, but on those where it occurs, our tor_timegm
700 function did not correctly invert the system's gmtime function,
701 which could result in assertion failures when calculating voting
702 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
705 Changes in version 0.4.5.10 - 2021-08-16
706 This version fixes several bugs from earlier versions of Tor,
707 including one that could lead to a denial-of-service attack. Everyone
708 running an earlier version, whether as a client, a relay, or an onion
709 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
711 o Major bugfixes (cryptography, security):
712 - Resolve an assertion failure caused by a behavior mismatch between
713 our batch-signature verification code and our single-signature
714 verification code. This assertion failure could be triggered
715 remotely, leading to a denial of service attack. We fix this issue
716 by disabling batch verification. Fixes bug 40078; bugfix on
717 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
718 CVE-2021-38385. Found by Henry de Valence.
720 o Minor feature (fallbackdir):
721 - Regenerate fallback directories list. Close ticket 40447.
723 o Minor features (geoip data):
724 - Update the geoip files to match the IPFire Location Database, as
725 retrieved on 2021/08/12.
727 o Minor features (testing):
728 - Enable the deterministic RNG for unit tests that covers the
729 address set bloomfilter-based API's. Fixes bug 40419; bugfix
732 o Minor bugfix (crypto, backport from 0.4.6.7):
733 - Disable the unused batch verification feature of ed25519-donna.
734 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
737 o Minor bugfixes (relay, backport from 0.4.6.7):
738 - Reduce the compression level for data streaming from HIGH to LOW.
739 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
741 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
742 - Calculate the time of day correctly on systems where the time_t
743 type includes leap seconds. (This is not the case on most
744 operating systems, but on those where it occurs, our tor_timegm
745 function did not correctly invert the system's gmtime function,
746 which could result in assertion failures when calculating voting
747 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
749 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
750 - Suppress a strict-prototype warning when building with some
751 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
754 Changes in version 0.3.5.16 - 2021-08-16
755 This version fixes several bugs from earlier versions of Tor,
756 including one that could lead to a denial-of-service attack. Everyone
757 running an earlier version, whether as a client, a relay, or an onion
758 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
760 o Major bugfixes (cryptography, security):
761 - Resolve an assertion failure caused by a behavior mismatch between
762 our batch-signature verification code and our single-signature
763 verification code. This assertion failure could be triggered
764 remotely, leading to a denial of service attack. We fix this issue
765 by disabling batch verification. Fixes bug 40078; bugfix on
766 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
767 CVE-2021-38385. Found by Henry de Valence.
769 o Minor feature (fallbackdir):
770 - Regenerate fallback directories list. Close ticket 40447.
772 o Minor features (geoip data):
773 - Update the geoip files to match the IPFire Location Database, as
774 retrieved on 2021/08/12.
776 o Minor bugfix (crypto, backport from 0.4.6.7):
777 - Disable the unused batch verification feature of ed25519-donna.
778 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
781 o Minor bugfixes (relay, backport from 0.4.6.7):
782 - Reduce the compression level for data streaming from HIGH to LOW.
783 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
786 Changes in version 0.4.6.6 - 2021-06-30
787 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
788 allows Tor to build correctly on older versions of GCC. You should
789 upgrade to this version if you were having trouble building Tor
790 0.4.6.5; otherwise, there is probably no need.
792 o Minor bugfixes (compilation):
793 - Fix a compilation error when trying to build Tor with a compiler
794 that does not support const variables in static initializers.
795 Fixes bug 40410; bugfix on 0.4.6.5.
796 - Suppress a strict-prototype warning when building with some
797 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
799 o Minor bugfixes (testing):
800 - Enable the deterministic RNG for unit tests that covers the
801 address set bloomfilter-based API's. Fixes bug 40419; bugfix
805 Changes in version 0.4.5.9 - 2021-06-14
806 Tor 0.4.5.9 fixes several security issues, including a
807 denial-of-service attack against onion service clients, and another
808 denial-of-service attack against relays. Everybody should upgrade to
809 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
811 o Major bugfixes (security, backport from 0.4.6.5):
812 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
813 half-closed streams. Previously, clients failed to validate which
814 hop sent these cells: this would allow a relay on a circuit to end
815 a stream that wasn't actually built with it. Fixes bug 40389;
816 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
817 003 and CVE-2021-34548.
819 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
820 - Detect more failure conditions from the OpenSSL RNG code.
821 Previously, we would detect errors from a missing RNG
822 implementation, but not failures from the RNG code itself.
823 Fortunately, it appears those failures do not happen in practice
824 when Tor is using OpenSSL's default RNG implementation. Fixes bug
825 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
826 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
828 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
829 - Resist a hashtable-based CPU denial-of-service attack against
830 relays. Previously we used a naive unkeyed hash function to look
831 up circuits in a circuitmux object. An attacker could exploit this
832 to construct circuits with chosen circuit IDs, to create
833 collisions and make the hash table inefficient. Now we use a
834 SipHash construction here instead. Fixes bug 40391; bugfix on
835 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
836 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
837 - Fix an out-of-bounds memory access in v3 onion service descriptor
838 parsing. An attacker could exploit this bug by crafting an onion
839 service descriptor that would crash any client that tried to visit
840 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
841 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
842 Glazunov from Google's Project Zero.
844 o Minor features (compatibility, backport from 0.4.6.4-rc):
845 - Remove an assertion function related to TLS renegotiation. It was
846 used nowhere outside the unit tests, and it was breaking
847 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
850 o Minor features (geoip data):
851 - Update the geoip files to match the IPFire Location Database, as
852 retrieved on 2021/06/10.
854 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
855 - Allow the control command SAVECONF to succeed when the seccomp
856 sandbox is enabled, and make SAVECONF keep only one backup file to
857 simplify implementation. Previously SAVECONF allowed a large
858 number of backup files, which made it incompatible with the
859 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
862 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
863 - Fix a bug that made tor try to re-bind() on an already open
864 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
868 Changes in version 0.4.4.9 - 2021-06-14
869 Tor 0.4.4.9 fixes several security issues, including a
870 denial-of-service attack against onion service clients, and another
871 denial-of-service attack against relays. Everybody should upgrade to
872 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
874 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
875 June 15. This is therefore the last release in its series. Everybody
876 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
878 o Major bugfixes (security, backport from 0.4.6.5):
879 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
880 half-closed streams. Previously, clients failed to validate which
881 hop sent these cells: this would allow a relay on a circuit to end
882 a stream that wasn't actually built with it. Fixes bug 40389;
883 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
884 003 and CVE-2021-34548.
886 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
887 - Detect more failure conditions from the OpenSSL RNG code.
888 Previously, we would detect errors from a missing RNG
889 implementation, but not failures from the RNG code itself.
890 Fortunately, it appears those failures do not happen in practice
891 when Tor is using OpenSSL's default RNG implementation. Fixes bug
892 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
893 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
895 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
896 - Resist a hashtable-based CPU denial-of-service attack against
897 relays. Previously we used a naive unkeyed hash function to look
898 up circuits in a circuitmux object. An attacker could exploit this
899 to construct circuits with chosen circuit IDs, to create
900 collisions and make the hash table inefficient. Now we use a
901 SipHash construction here instead. Fixes bug 40391; bugfix on
902 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
903 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
904 - Fix an out-of-bounds memory access in v3 onion service descriptor
905 parsing. An attacker could exploit this bug by crafting an onion
906 service descriptor that would crash any client that tried to visit
907 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
908 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
909 Glazunov from Google's Project Zero.
911 o Minor features (compatibility, backport from 0.4.6.4-rc):
912 - Remove an assertion function related to TLS renegotiation. It was
913 used nowhere outside the unit tests, and it was breaking
914 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
917 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
918 - Regenerate the list of fallback directories to contain a new set
919 of 200 relays. Closes ticket 40265.
921 o Minor features (geoip data):
922 - Update the geoip files to match the IPFire Location Database, as
923 retrieved on 2021/06/10.
925 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
926 - Fix a non-fatal BUG() message due to a too-early free of a string,
927 when listing a client connection from the DoS defenses subsystem.
928 Fixes bug 40345; bugfix on 0.4.3.4-rc.
930 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
931 - Fix an indentation problem that led to a warning from GCC 11.1.1.
932 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
935 Changes in version 0.3.5.15 - 2021-06-14
936 Tor 0.3.5.15 fixes several security issues, including a
937 denial-of-service attack against onion service clients, and another
938 denial-of-service attack against relays. Everybody should upgrade to
939 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
941 o Major bugfixes (security, backport from 0.4.6.5):
942 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
943 half-closed streams. Previously, clients failed to validate which
944 hop sent these cells: this would allow a relay on a circuit to end
945 a stream that wasn't actually built with it. Fixes bug 40389;
946 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
947 003 and CVE-2021-34548.
949 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
950 - Detect more failure conditions from the OpenSSL RNG code.
951 Previously, we would detect errors from a missing RNG
952 implementation, but not failures from the RNG code itself.
953 Fortunately, it appears those failures do not happen in practice
954 when Tor is using OpenSSL's default RNG implementation. Fixes bug
955 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
956 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
958 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
959 - Resist a hashtable-based CPU denial-of-service attack against
960 relays. Previously we used a naive unkeyed hash function to look
961 up circuits in a circuitmux object. An attacker could exploit this
962 to construct circuits with chosen circuit IDs, to create
963 collisions and make the hash table inefficient. Now we use a
964 SipHash construction here instead. Fixes bug 40391; bugfix on
965 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
966 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
967 - Fix an out-of-bounds memory access in v3 onion service descriptor
968 parsing. An attacker could exploit this bug by crafting an onion
969 service descriptor that would crash any client that tried to visit
970 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
971 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
972 Glazunov from Google's Project Zero.
974 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
975 - Fix an indentation problem that led to a warning from GCC 11.1.1.
976 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
978 o Minor features (compatibility, backport from 0.4.6.4-rc):
979 - Remove an assertion function related to TLS renegotiation. It was
980 used nowhere outside the unit tests, and it was breaking
981 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
984 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
985 - Regenerate the list of fallback directories to contain a new set
986 of 200 relays. Closes ticket 40265.
988 o Minor features (geoip data):
989 - Update the geoip files to match the IPFire Location Database, as
990 retrieved on 2021/06/10.
993 Changes in version 0.4.6.5 - 2021-06-14
994 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
995 series includes numerous features and bugfixes, including a significant
996 improvement to our circuit timeout algorithm that should improve
997 observed client performance, and a way for relays to report when they are
1000 This release also includes security fixes for several security issues,
1001 including a denial-of-service attack against onion service clients,
1002 and another denial-of-service attack against relays. Everybody should
1003 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
1005 Below are the changes since 0.4.6.4-rc. For a complete list of changes
1006 since 0.4.5.8, see the ReleaseNotes file.
1008 o Major bugfixes (security):
1009 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
1010 half-closed streams. Previously, clients failed to validate which
1011 hop sent these cells: this would allow a relay on a circuit to end
1012 a stream that wasn't actually built with it. Fixes bug 40389;
1013 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
1014 003 and CVE-2021-34548.
1016 o Major bugfixes (security, defense-in-depth):
1017 - Detect more failure conditions from the OpenSSL RNG code.
1018 Previously, we would detect errors from a missing RNG
1019 implementation, but not failures from the RNG code itself.
1020 Fortunately, it appears those failures do not happen in practice
1021 when Tor is using OpenSSL's default RNG implementation. Fixes bug
1022 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
1023 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
1025 o Major bugfixes (security, denial of service):
1026 - Resist a hashtable-based CPU denial-of-service attack against
1027 relays. Previously we used a naive unkeyed hash function to look
1028 up circuits in a circuitmux object. An attacker could exploit this
1029 to construct circuits with chosen circuit IDs, to create
1030 collisions and make the hash table inefficient. Now we use a
1031 SipHash construction here instead. Fixes bug 40391; bugfix on
1032 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
1033 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
1034 - Fix an out-of-bounds memory access in v3 onion service descriptor
1035 parsing. An attacker could exploit this bug by crafting an onion
1036 service descriptor that would crash any client that tried to visit
1037 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
1038 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
1039 Glazunov from Google's Project Zero.
1041 o Minor features (geoip data):
1042 - Update the geoip files to match the IPFire Location Database, as
1043 retrieved on 2021/06/10.
1045 o Minor features (logging, diagnostic):
1046 - Log decompression failures at a higher severity level, since they
1047 can help provide missing context for other warning messages. We
1048 rate-limit these messages, to avoid flooding the logs if they
1049 begin to occur frequently. Closes ticket 40175.
1052 Changes in version 0.4.6.4-rc - 2021-05-28
1053 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
1054 the final release candidate in its series: unless major new issues are
1055 found, the next release will be stable.
1057 o Minor features (compatibility):
1058 - Remove an assertion function related to TLS renegotiation. It was
1059 used nowhere outside the unit tests, and it was breaking
1060 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
1063 o Minor bugfixes (consensus handling):
1064 - Avoid a set of bugs that could be caused by inconsistently
1065 preferring an out-of-date consensus stored in a stale directory
1066 cache over a more recent one stored on disk as the latest
1067 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
1069 o Minor bugfixes (control, sandbox):
1070 - Allow the control command SAVECONF to succeed when the seccomp
1071 sandbox is enabled, and make SAVECONF keep only one backup file to
1072 simplify implementation. Previously SAVECONF allowed a large
1073 number of backup files, which made it incompatible with the
1074 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
1077 o Minor bugfixes (metrics port):
1078 - Fix a bug that made tor try to re-bind() on an already open
1079 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
1083 - Remove unneeded code for parsing private keys in directory
1084 documents. This code was only used for client authentication in v2
1085 onion services, which are now unsupported. Closes ticket 40374.
1088 Changes in version 0.4.5.8 - 2021-05-10
1089 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
1090 from the 0.4.6.x series.
1092 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
1093 - Add a workaround to enable the Linux sandbox to work correctly
1094 with Glibc 2.33. This version of Glibc has started using the
1095 fstatat() system call, which previously our sandbox did not allow.
1096 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1098 o Minor features (compilation, backport from 0.4.6.3-rc):
1099 - Make the autoconf script build correctly with autoconf versions
1100 2.70 and later. Closes part of ticket 40335.
1102 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
1103 - Regenerate the list of fallback directories to contain a new set
1104 of 200 relays. Closes ticket 40265.
1106 o Minor features (geoip data):
1107 - Update the geoip files to match the IPFire Location Database, as
1108 retrieved on 2021/05/07.
1110 o Minor features (onion services):
1111 - Add warning message when connecting to now deprecated v2 onion
1112 services. As announced, Tor 0.4.5.x is the last series that will
1113 support v2 onions. Closes ticket 40373.
1115 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
1116 - Fix a regression that made it impossible start Tor using a bridge
1117 line with a transport name and no fingerprint. Fixes bug 40360;
1118 bugfix on 0.4.5.4-rc.
1120 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
1121 - Allow a custom "ar" for cross-compilation. Our previous build
1122 script had used the $AR environment variable in most places, but
1123 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1125 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
1126 - Fix a non-fatal BUG() message due to a too-early free of a string,
1127 when listing a client connection from the DoS defenses subsystem.
1128 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1130 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
1131 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1132 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1134 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
1135 - Fix a "BUG" warning that would appear when a controller chooses
1136 the first hop for a circuit, and that circuit completes. Fixes bug
1137 40285; bugfix on 0.3.2.1-alpha.
1139 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
1140 - Fix a bug where an expired cached descriptor could get overwritten
1141 with a new one without freeing it, leading to a memory leak. Fixes
1142 bug 40356; bugfix on 0.3.5.1-alpha.
1144 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
1145 - Fix pattern-matching errors when patterns expand to invalid paths
1146 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1150 Changes in version 0.4.6.3-rc - 2021-05-10
1151 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
1152 a few small bugs from previous versions, and adds a better error
1153 message when trying to use (no longer supported) v2 onion services.
1155 Though we anticipate that we'll be doing a bit more clean-up between
1156 now and the stable release, we expect that our remaining changes will
1157 be fairly simple. There will likely be at least one more release
1158 candidate before 0.4.6.x is stable.
1160 o Major bugfixes (onion service, control port):
1161 - Make the ADD_ONION command properly configure client authorization.
1162 Before this fix, the created onion failed to add the client(s).
1163 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
1165 o Minor features (compatibility, Linux seccomp sandbox):
1166 - Add a workaround to enable the Linux sandbox to work correctly
1167 with Glibc 2.33. This version of Glibc has started using the
1168 fstatat() system call, which previously our sandbox did not allow.
1169 Closes ticket 40382; see the ticket for a discussion of trade-offs.
1171 o Minor features (compilation):
1172 - Make the autoconf script build correctly with autoconf versions
1173 2.70 and later. Closes part of ticket 40335.
1175 o Minor features (geoip data):
1176 - Update the geoip files to match the IPFire Location Database, as
1177 retrieved on 2021/05/07.
1179 o Minor features (onion services):
1180 - Add a warning message when trying to connect to (no longer
1181 supported) v2 onion services. Closes ticket 40373.
1183 o Minor bugfixes (build, cross-compilation):
1184 - Allow a custom "ar" for cross-compilation. Our previous build
1185 script had used the $AR environment variable in most places, but
1186 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
1188 o Minor bugfixes (compiler warnings):
1189 - Fix an indentation problem that led to a warning from GCC 11.1.1.
1190 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
1192 o Minor bugfixes (logging, relay):
1193 - Emit a warning if an Address is found to be internal and tor can't
1194 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
1196 o Minor bugfixes (onion service, client, memory leak):
1197 - Fix a bug where an expired cached descriptor could get overwritten
1198 with a new one without freeing it, leading to a memory leak. Fixes
1199 bug 40356; bugfix on 0.3.5.1-alpha.
1202 Changes in version 0.4.6.2-alpha - 2021-04-15
1203 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
1204 small bugs in previous releases, and solves other issues that had
1205 enabled denial-of-service attacks and affected integration with
1208 o Minor features (client):
1209 - Clients now check whether their streams are attempting to re-enter
1210 the Tor network (i.e. to send Tor traffic over Tor), and close
1211 them preemptively if they think exit relays will refuse them for
1212 this reason. See ticket 2667 for details. Closes ticket 40271.
1214 o Minor features (command line):
1215 - Add long format name "--torrc-file" equivalent to the existing
1216 command-line option "-f". Closes ticket 40324. Patch by
1219 o Minor features (dormant mode):
1220 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
1221 control over whether the client ever becomes dormant from
1222 inactivity. Most people won't need this. Closes ticket 40228.
1224 o Minor features (fallback directory list):
1225 - Regenerate the list of fallback directories to contain a new set
1226 of 200 relays. Closes ticket 40265.
1228 o Minor features (geoip data):
1229 - Update the geoip files to match the IPFire Location Database, as
1230 retrieved on 2021/04/13.
1232 o Minor features (logging):
1233 - Edit heartbeat log messages so that more of them begin with the
1234 string "Heartbeat: ". Closes ticket 40322; patch
1237 o Minor bugfixes (bridge, pluggable transport):
1238 - Fix a regression that made it impossible start Tor using a bridge
1239 line with a transport name and no fingerprint. Fixes bug 40360;
1240 bugfix on 0.4.5.4-rc.
1242 o Minor bugfixes (channel, DoS):
1243 - Fix a non-fatal BUG() message due to a too-early free of a string,
1244 when listing a client connection from the DoS defenses subsystem.
1245 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1247 o Minor bugfixes (compilation):
1248 - Fix a compilation warning about unused functions when building
1249 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1250 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1252 o Minor bugfixes (configuration):
1253 - Fix pattern-matching for directories on all platforms when using
1254 %include options in configuration files. This patch also fixes
1255 compilation on musl libc based systems. Fixes bug 40141; bugfix
1258 o Minor bugfixes (relay):
1259 - Move the "overload-general" line from extrainfo to the server
1260 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1262 o Minor bugfixes (testing, BSD):
1263 - Fix pattern-matching errors when patterns expand to invalid paths
1264 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1267 o Documentation (manual):
1268 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1270 - Indicate that the HiddenServiceStatistics option also applies to
1271 bridges. Closes ticket 40346.
1272 - Move the description of BridgeRecordUsageByCountry to the section
1273 "STATISTICS OPTIONS". Closes ticket 40323.
1276 Changes in version 0.4.6.1-alpha - 2021-03-18
1277 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1278 improves client circuit performance, adds missing features, and
1279 improves some of our DoS handling and statistics reporting. It also
1280 includes numerous smaller bugfixes.
1282 Below are the changes since 0.4.5.7. (Note that this release DOES
1283 include the fixes for the security bugs already fixed in 0.4.5.7.)
1285 o Major features (control port, onion services):
1286 - Add controller support for creating version 3 onion services with
1287 client authorization. Previously, only v2 onion services could be
1288 created with client authorization. Closes ticket 40084. Patch by
1291 o Major features (directory authority):
1292 - When voting on a relay with a Sybil-like appearance, add the Sybil
1293 flag when clearing out the other flags. This lets a relay operator
1294 know why their relay hasn't been included in the consensus. Closes
1295 ticket 40255. Patch by Neel Chauhan.
1297 o Major features (metrics):
1298 - Relays now report how overloaded they are in their extrainfo
1299 documents. This information is controlled with the
1300 OverloadStatistics torrc option, and it will be used to improve
1301 decisions about the network's load balancing. Implements proposal
1302 328; closes ticket 40222.
1304 o Major features (relay, denial of service):
1305 - Add a new DoS subsystem feature to control the rate of client
1306 connections for relays. Closes ticket 40253.
1308 o Major features (statistics):
1309 - Relays now publish statistics about the number of v3 onion
1310 services and volume of v3 onion service traffic, in the same
1311 manner they already do for v2 onions. Closes ticket 23126.
1313 o Major bugfixes (circuit build timeout):
1314 - Improve the accuracy of our circuit build timeout calculation for
1315 60%, 70%, and 80% build rates for various guard choices. We now
1316 use a maximum likelihood estimator for Pareto parameters of the
1317 circuit build time distribution, instead of a "right-censored
1318 estimator". This causes clients to ignore circuits that never
1319 finish building in their timeout calculations. Previously, clients
1320 were counting such unfinished circuits as having the highest
1321 possible build time value, when in reality these circuits most
1322 likely just contain relays that are offline. We also now wait a
1323 bit longer to let circuits complete for measurement purposes,
1324 lower the minimum possible effective timeout from 1.5 seconds to
1325 10ms, and increase the resolution of the circuit build time
1326 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1327 we alter our estimate Xm by taking the maximum of the top 10 most
1328 common build time values of the 10ms histogram, and compute Xm as
1329 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1330 - Remove max_time calculation and associated warning from circuit
1331 build timeout 'alpha' parameter estimation, as this is no longer
1332 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1335 o Major bugfixes (signing key):
1336 - In the tor-gencert utility, give an informative error message if
1337 the passphrase given in `--create-identity-key` is too short.
1338 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1340 o Minor features (bridge):
1341 - We now announce the URL to Tor's new bridge status at
1342 https://bridges.torproject.org/ when Tor is configured to run as a
1343 bridge relay. Closes ticket 30477.
1345 o Minor features (build system):
1346 - New "make lsp" command to auto generate the compile_commands.json
1347 file used by the ccls server. The "bear" program is needed for
1348 this. Closes ticket 40227.
1350 o Minor features (command-line interface):
1351 - Add build informations to `tor --version` in order to ease
1352 reproducible builds. Closes ticket 32102.
1353 - When parsing command-line flags that take an optional argument,
1354 treat the argument as absent if it would start with a '-'
1355 character. Arguments in that form are not intelligible for any of
1356 our optional-argument flags. Closes ticket 40223.
1357 - Allow a relay operator to list the ed25519 keys on the command
1358 line by adding the `rsa` and `ed25519` arguments to the
1359 --list-fingerprint flag to show the respective RSA and ed25519
1360 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1362 o Minor features (control port, stream handling):
1363 - Add the stream ID to the event line in the ADDRMAP control event.
1364 Closes ticket 40249. Patch by Neel Chauhan.
1366 o Minor features (dormant mode):
1367 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1368 control over whether the client can become dormant from
1369 inactivity. Most people won't need this. Closes ticket 40228.
1371 o Minor features (logging):
1372 - Change the DoS subsystem heartbeat line format to be more clear on
1373 what has been detected/rejected, and which option is disabled (if
1374 any). Closes ticket 40308.
1375 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1376 put brackets around IPv6 addresses in log messages. Closes ticket
1377 40232. Patch by Neel Chauhan.
1379 o Minor features (performance, windows):
1380 - Use SRWLocks to implement locking on Windows. Replaces the
1381 "critical section" locking implementation with the faster
1382 SRWLocks, available since Windows Vista. Closes ticket 17927.
1383 Patch by Daniel Pinto.
1385 o Minor features (protocol, proxy support, defense in depth):
1386 - Close HAProxy connections if they somehow manage to send us data
1387 before we start reading. Closes another case of ticket 40017.
1389 o Minor features (tests, portability):
1390 - Port the hs_build_address.py test script to work with recent
1391 versions of python. Closes ticket 40213. Patch from
1394 o Minor features (vote document):
1395 - Add a "stats" line to directory authority votes, to report various
1396 statistics that authorities compute about the relays. This will
1397 help us diagnose the network better. Closes ticket 40314.
1399 o Minor bugfixes (build):
1400 - The configure script now shows whether or not lzma and zstd have
1401 been used, not just if the enable flag was passed in. Fixes bug
1402 40236; bugfix on 0.4.3.1-alpha.
1404 o Minor bugfixes (compatibility):
1405 - Fix a failure in the test cases when running on the "hppa"
1406 architecture, along with a related test that might fail on other
1407 architectures in the future. Fixes bug 40274; bugfix
1410 o Minor bugfixes (controller):
1411 - Fix a "BUG" warning that would appear when a controller chooses
1412 the first hop for a circuit, and that circuit completes. Fixes bug
1413 40285; bugfix on 0.3.2.1-alpha.
1415 o Minor bugfixes (directory authorities, voting):
1416 - Add a new consensus method (31) to support any future changes that
1417 authorities decide to make to the value of bwweightscale or
1418 maxunmeasuredbw. Previously, there was a bug that prevented the
1419 authorities from parsing these consensus parameters correctly under
1420 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1422 o Minor bugfixes (ipv6):
1423 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1424 rare configurations might break, but in this case you can disable
1425 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1426 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1428 o Minor bugfixes (key generation):
1429 - Do not require a valid torrc when using the `--keygen` argument to
1430 generate a signing key. This allows us to generate keys on systems
1431 or users which may not run Tor. Fixes bug 40235; bugfix on
1432 0.2.7.2-alpha. Patch by Neel Chauhan.
1434 o Minor bugfixes (onion services, logging):
1435 - Downgrade the severity of a few rendezvous circuit-related
1436 warnings from warning to info. Fixes bug 40207; bugfix on
1437 0.3.2.1-alpha. Patch by Neel Chauhan.
1439 o Minor bugfixes (relay):
1440 - Reduce the compression level for data streaming from HIGH to LOW.
1441 This should reduce the CPU and memory burden for directory caches.
1442 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1444 o Code simplification and refactoring:
1445 - Remove the orconn_ext_or_id_map structure and related functions.
1446 (Nothing outside of unit tests used them.) Closes ticket 33383.
1447 Patch by Neel Chauhan.
1450 - As of this release, Tor no longer supports the old v2 onion
1451 services. They were deprecated last July for security, and support
1452 will be removed entirely later this year. We strongly encourage
1453 everybody to migrate to v3 onion services. For more information,
1454 see https://blog.torproject.org/v2-deprecation-timeline . Closes
1455 ticket 40266. (NOTE: We accidentally released an earlier version
1456 of the 0.4.6.1-alpha changelog without this entry. Sorry for
1459 o Code simplification and refactoring (metrics, DoS):
1460 - Move the DoS subsystem into the subsys manager, including its
1461 configuration options. Closes ticket 40261.
1463 o Removed features (relay):
1464 - Because DirPorts are only used on authorities, relays no longer
1465 advertise them. Similarly, self-testing for DirPorts has been
1466 disabled, since an unreachable DirPort is no reason for a relay
1467 not to advertise itself. (Configuring a DirPort will still work,
1468 for now.) Closes ticket 40282.
1471 Changes in version 0.3.5.14 - 2021-03-16
1472 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
1473 in earlier versions of Tor.
1475 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1476 who can send directory data to a Tor instance to force that Tor
1477 instance to consume huge amounts of CPU. This is easiest to exploit
1478 against authorities, since anybody can upload to them, but directory
1479 caches could also exploit this vulnerability against relays or clients
1480 when they download. The other vulnerability (TROVE-2021-002) only
1481 affects directory authorities, and would allow an attacker to remotely
1482 crash the authority with an assertion failure. Patches have already
1483 been provided to the authority operators, to help ensure
1486 We recommend that everybody upgrade to one of the releases that fixes
1487 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1490 This release also updates our GeoIP data source, and fixes a
1491 compatibility issue.
1493 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1494 - Disable the dump_desc() function that we used to dump unparseable
1495 information to disk. It was called incorrectly in several places,
1496 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1497 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1498 001 and CVE-2021-28089.
1499 - Fix a bug in appending detached signatures to a pending consensus
1500 document that could be used to crash a directory authority. Fixes
1501 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1504 o Minor features (geoip data, backport from 0.4.5.7):
1505 - We have switched geoip data sources. Previously we shipped IP-to-
1506 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1507 their licensing terms, so we were unable to update them after that
1508 point. We now ship geoip files based on the IPFire Location
1509 Database instead. (See https://location.ipfire.org/ for more
1510 information). This release updates our geoip files to match the
1511 IPFire Location Database as retrieved on 2021/03/12. Closes
1514 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1515 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1516 Closes ticket 40309.
1519 Changes in version 0.4.4.8 - 2021-03-16
1520 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
1521 in earlier versions of Tor.
1523 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1524 who can send directory data to a Tor instance to force that Tor
1525 instance to consume huge amounts of CPU. This is easiest to exploit
1526 against authorities, since anybody can upload to them, but directory
1527 caches could also exploit this vulnerability against relays or clients
1528 when they download. The other vulnerability (TROVE-2021-002) only
1529 affects directory authorities, and would allow an attacker to remotely
1530 crash the authority with an assertion failure. Patches have already
1531 been provided to the authority operators, to help ensure
1534 We recommend that everybody upgrade to one of the releases that fixes
1535 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1538 This release also updates our GeoIP data source, and fixes a
1539 compatibility issue.
1541 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1542 - Disable the dump_desc() function that we used to dump unparseable
1543 information to disk. It was called incorrectly in several places,
1544 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1545 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1546 001 and CVE-2021-28089.
1547 - Fix a bug in appending detached signatures to a pending consensus
1548 document that could be used to crash a directory authority. Fixes
1549 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1552 o Minor features (geoip data, backport from 0.4.5.7):
1553 - We have switched geoip data sources. Previously we shipped IP-to-
1554 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1555 their licensing terms, so we were unable to update them after that
1556 point. We now ship geoip files based on the IPFire Location
1557 Database instead. (See https://location.ipfire.org/ for more
1558 information). This release updates our geoip files to match the
1559 IPFire Location Database as retrieved on 2021/03/12. Closes
1562 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1563 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1564 Closes ticket 40309.
1567 Changes in version 0.4.5.7 - 2021-03-16
1568 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1571 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1572 who can send directory data to a Tor instance to force that Tor
1573 instance to consume huge amounts of CPU. This is easiest to exploit
1574 against authorities, since anybody can upload to them, but directory
1575 caches could also exploit this vulnerability against relays or clients
1576 when they download. The other vulnerability (TROVE-2021-002) only
1577 affects directory authorities, and would allow an attacker to remotely
1578 crash the authority with an assertion failure. Patches have already
1579 been provided to the authority operators, to help ensure
1582 We recommend that everybody upgrade to one of the releases that fixes
1583 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1586 This release also updates our GeoIP data source, and fixes a few
1587 smaller bugs in earlier releases.
1589 o Major bugfixes (security, denial of service):
1590 - Disable the dump_desc() function that we used to dump unparseable
1591 information to disk. It was called incorrectly in several places,
1592 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1593 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1594 001 and CVE-2021-28089.
1595 - Fix a bug in appending detached signatures to a pending consensus
1596 document that could be used to crash a directory authority. Fixes
1597 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1600 o Minor features (geoip data):
1601 - We have switched geoip data sources. Previously we shipped IP-to-
1602 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1603 their licensing terms, so we were unable to update them after that
1604 point. We now ship geoip files based on the IPFire Location
1605 Database instead. (See https://location.ipfire.org/ for more
1606 information). This release updates our geoip files to match the
1607 IPFire Location Database as retrieved on 2021/03/12. Closes
1610 o Minor bugfixes (directory authority):
1611 - Now that exit relays don't allow exit connections to directory
1612 authority DirPorts (to prevent network reentry), disable
1613 authorities' reachability self test on the DirPort. Fixes bug
1614 40287; bugfix on 0.4.5.5-rc.
1616 o Minor bugfixes (documentation):
1617 - Fix a formatting error in the documentation for
1618 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
1620 o Minor bugfixes (Linux, relay):
1621 - Fix a bug in determining total available system memory that would
1622 have been triggered if the format of Linux's /proc/meminfo file
1623 had ever changed to include "MemTotal:" in the middle of a line.
1624 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
1626 o Minor bugfixes (metrics port):
1627 - Fix a BUG() warning on the MetricsPort for an internal missing
1628 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
1630 o Minor bugfixes (onion service):
1631 - Remove a harmless BUG() warning when reloading tor configured with
1632 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
1634 o Minor bugfixes (portability):
1635 - Fix a non-portable usage of "==" with "test" in the configure
1636 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
1638 o Minor bugfixes (relay):
1639 - Remove a spammy log notice falsely claiming that the IPv4/v6
1640 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
1641 - Do not query the address cache early in the boot process when
1642 deciding if a relay needs to fetch early directory information
1643 from an authority. This bug resulted in a relay falsely believing
1644 it didn't have an address and thus triggering an authority fetch
1645 at each boot. Related to our fix for 40300.
1647 o Removed features (mallinfo deprecated):
1648 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1649 Closes ticket 40309.
1652 Changes in version 0.4.5.6 - 2021-02-15
1653 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
1654 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
1655 Karsten is best known for creating the Tor metrics portal and leading
1656 the metrics team, but he was involved in Tor from the early days. For
1657 example, while he was still a student he invented and implemented the
1658 v2 onion service directory design, and he also served as an ambassador
1659 to the many German researchers working in the anonymity field. We
1660 loved him and respected him for his patience, his consistency, and his
1661 welcoming approach to growing our community.
1663 This release series introduces significant improvements in relay IPv6
1664 address discovery, a new "MetricsPort" mechanism for relay operators
1665 to measure performance, LTTng support, build system improvements to
1666 help when using Tor as a static library, and significant bugfixes
1667 related to Windows relay performance. It also includes numerous
1668 smaller features and bugfixes.
1670 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1671 since 0.4.4.7, see the ReleaseNotes file.
1673 o Major bugfixes (IPv6, relay):
1674 - Fix a bug that prevented a relay from publishing its descriptor if
1675 an auto-discovered IPv6 that was found unreachable. Fixes bug
1676 40279; bugfix on 0.4.5.1-alpha.
1678 o Minor features (protocol versions):
1679 - Stop claiming to support the "DirCache=1" subprotocol version.
1680 Technically, we stopped supporting this subprotocol back in
1681 0.4.5.1-alpha, but we needed to wait for the authorities to stop
1682 listing it as "required" before we could drop it from the list.
1683 Closes ticket 40221.
1685 o Minor bugfixes (logging):
1686 - Avoid a spurious log message about missing subprotocol versions,
1687 when the consensus that we're reading from is older than the
1688 current release. Previously we had made this message nonfatal, but
1689 in practice, it is never relevant when the consensus is older than
1690 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
1692 o Minor bugfixes (metrics port):
1693 - Fix a bug warning when a metrics port socket was unexpectedly
1694 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
1696 o Minor bugfixes (relay):
1697 - Allow relays to have a RFC1918 address if PublishServerDescriptor
1698 is set to 0 and AssumeReachable is set to 1. This is to support
1699 the use case of a bridge on a local network, exposed via a
1700 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
1702 o Minor bugfixes (relay, config):
1703 - Fix a problem in the removal of duplicate ORPorts from the
1704 internal port list when loading the config file. We were removing
1705 the wrong ports, breaking valid torrc uses cases for multiple
1706 ORPorts of the same address family. Fixes bug 40289; bugfix
1710 Changes in version 0.4.4.7 - 2021-02-03
1711 Tor 0.4.4.7 backports numerous bugfixes from later releases,
1712 including one that made v3 onion services more susceptible to
1713 denial-of-service attacks, and a feature that makes some kinds of
1714 DoS attacks harder to perform.
1716 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1717 - Stop requiring a live consensus for v3 clients and services, and
1718 allow a "reasonably live" consensus instead. This allows v3 onion
1719 services to work even if the authorities fail to generate a
1720 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1723 o Major feature (exit, backport from 0.4.5.5-rc):
1724 - Re-entry into the network is now denied at the Exit level to all
1725 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1726 should help mitgate a set of denial-of-service attacks. Closes
1729 o Minor feature (build system, backport from 0.4.5.4-rc):
1730 - New "make lsp" command to generate the compile_commands.json file
1731 used by the ccls language server. The "bear" program is needed for
1732 this. Closes ticket 40227.
1734 o Minor features (compilation, backport from 0.4.5.2-rc):
1735 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1736 later. There are a number of APIs newly deprecated in OpenSSL
1737 3.0.0 that Tor still requires. (A later version of Tor will try to
1738 stop depending on these APIs.) Closes ticket 40165.
1740 o Minor features (crypto, backport from 0.4.5.3-rc):
1741 - Fix undefined behavior on our Keccak library. The bug only
1742 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1743 and would result in wrong digests. Fixes bug 40210; bugfix on
1744 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1745 weasel for diagnosing this.
1747 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1748 - Strip '\r' characters when reading text files on Unix platforms.
1749 This should resolve an issue where a relay operator migrates a
1750 relay from Windows to Unix, but does not change the line ending of
1751 Tor's various state files to match the platform, and the CRLF line
1752 endings from Windows end up leaking into other files such as the
1753 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1755 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1756 - Fix a compilation warning about unreachable fallthrough
1757 annotations when building with "--enable-all-bugs-are-fatal" on
1758 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1760 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1761 - Handle partial SOCKS5 messages correctly. Previously, our code
1762 would send an incorrect error message if it got a SOCKS5 request
1763 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1765 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1766 - Fix the `config/parse_tcp_proxy_line` test so that it works
1767 correctly on systems where the DNS provider hijacks invalid
1768 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1769 - Fix our Python reference-implementation for the v3 onion service
1770 handshake so that it works correctly with the version of hashlib
1771 provided by Python 3.9. Fixes part of bug 40179; bugfix
1773 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1774 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1777 Changes in version 0.4.3.8 - 2021-02-03
1778 Tor 0.4.3.8 backports numerous bugfixes from later releases,
1779 including one that made v3 onion services more susceptible to
1780 denial-of-service attacks, and a feature that makes some kinds of
1781 DoS attacks harder to perform.
1783 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
1784 which will reach end-of-life on 15 Feb 2021.
1786 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1787 - Stop requiring a live consensus for v3 clients and services, and
1788 allow a "reasonably live" consensus instead. This allows v3 onion
1789 services to work even if the authorities fail to generate a
1790 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1793 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1794 - Fix a bug where we were undercounting the Tor network's total
1795 onion service traffic, by ignoring any traffic originating from
1796 clients. Now we count traffic from both clients and services.
1797 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1799 o Major feature (exit, backport from 0.4.5.5-rc):
1800 - Re-entry into the network is now denied at the Exit level to all
1801 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1802 should help mitgate a set of denial-of-service attacks. Closes
1805 o Minor feature (build system, backport from 0.4.5.4-rc):
1806 - New "make lsp" command to generate the compile_commands.json file
1807 used by the ccls language server. The "bear" program is needed for
1808 this. Closes ticket 40227.
1810 o Minor features (compilation, backport from 0.4.5.2-rc):
1811 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1812 later. There are a number of APIs newly deprecated in OpenSSL
1813 3.0.0 that Tor still requires. (A later version of Tor will try to
1814 stop depending on these APIs.) Closes ticket 40165.
1816 o Minor features (crypto, backport from 0.4.5.3-rc):
1817 - Fix undefined behavior on our Keccak library. The bug only
1818 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1819 and would result in wrong digests. Fixes bug 40210; bugfix on
1820 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1821 weasel for diagnosing this.
1823 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1824 - Strip '\r' characters when reading text files on Unix platforms.
1825 This should resolve an issue where a relay operator migrates a
1826 relay from Windows to Unix, but does not change the line ending of
1827 Tor's various state files to match the platform, and the CRLF line
1828 endings from Windows end up leaking into other files such as the
1829 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1831 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1832 - Resolve a compilation warning that could occur in
1833 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1835 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1836 - Fix a compilation warning about unreachable fallthrough
1837 annotations when building with "--enable-all-bugs-are-fatal" on
1838 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1840 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1841 - Handle partial SOCKS5 messages correctly. Previously, our code
1842 would send an incorrect error message if it got a SOCKS5 request
1843 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1845 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1846 - Fix the `config/parse_tcp_proxy_line` test so that it works
1847 correctly on systems where the DNS provider hijacks invalid
1848 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1849 - Fix our Python reference-implementation for the v3 onion service
1850 handshake so that it works correctly with the version of hashlib
1851 provided by Python 3.9. Fixes part of bug 40179; bugfix
1853 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1854 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1857 Changes in version 0.3.5.13 - 2020-02-03
1858 Tor 0.3.5.13 backports numerous bugfixes from later releases,
1859 including one that made v3 onion services more susceptible to
1860 denial-of-service attacks, and a feature that makes some kinds of
1861 DoS attacks harder to perform.
1863 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1864 - Stop requiring a live consensus for v3 clients and services, and
1865 allow a "reasonably live" consensus instead. This allows v3 onion
1866 services to work even if the authorities fail to generate a
1867 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1870 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1871 - Fix a bug where we were undercounting the Tor network's total
1872 onion service traffic, by ignoring any traffic originating from
1873 clients. Now we count traffic from both clients and services.
1874 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1876 o Major feature (exit, backport from 0.4.5.5-rc):
1877 - Re-entry into the network is now denied at the Exit level to all
1878 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1879 should help mitgate a set of denial-of-service attacks. Closes
1882 o Minor feature (build system, backport from 0.4.5.4-rc):
1883 - New "make lsp" command to generate the compile_commands.json file
1884 used by the ccls language server. The "bear" program is needed for
1885 this. Closes ticket 40227.
1887 o Minor features (compilation, backport from 0.4.5.2-rc):
1888 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1889 later. There are a number of APIs newly deprecated in OpenSSL
1890 3.0.0 that Tor still requires. (A later version of Tor will try to
1891 stop depending on these APIs.) Closes ticket 40165.
1893 o Minor features (crypto, backport from 0.4.5.3-rc):
1894 - Fix undefined behavior on our Keccak library. The bug only
1895 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1896 and would result in wrong digests. Fixes bug 40210; bugfix on
1897 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1898 weasel for diagnosing this.
1900 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1901 - Strip '\r' characters when reading text files on Unix platforms.
1902 This should resolve an issue where a relay operator migrates a
1903 relay from Windows to Unix, but does not change the line ending of
1904 Tor's various state files to match the platform, and the CRLF line
1905 endings from Windows end up leaking into other files such as the
1906 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1908 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1909 - Resolve a compilation warning that could occur in
1910 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1912 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1913 - Fix a compilation warning about unreachable fallthrough
1914 annotations when building with "--enable-all-bugs-are-fatal" on
1915 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1917 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1918 - Handle partial SOCKS5 messages correctly. Previously, our code
1919 would send an incorrect error message if it got a SOCKS5 request
1920 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1922 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1923 - Fix our Python reference-implementation for the v3 onion service
1924 handshake so that it works correctly with the version of hashlib
1925 provided by Python 3.9. Fixes part of bug 40179; bugfix
1927 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1928 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1931 Changes in version 0.4.5.5-rc - 2021-02-01
1932 Tor 0.4.5.5-rc is the third release candidate in its series. We're
1933 coming closer and closer to a stable release series. This release
1934 fixes an annoyance with address detection code, and somewhat mitigates
1935 an ongoing denial-of-service attack.
1937 We anticipate no more code changes between this and the stable
1938 release, though of course that could change.
1940 o Major feature (exit):
1941 - Re-entry into the network is now denied at the Exit level to all
1942 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1943 should help mitgate a set of denial-of-service attacks. Closes
1946 o Minor bugfixes (relay, configuration):
1947 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
1948 for it can be found in the configuration. Fixes bug 40254; bugfix
1952 Changes in version 0.4.5.4-rc - 2021-01-22
1953 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
1954 several bugs present in previous releases.
1956 We expect that the stable release will be the same, or almost the
1957 same, as this release candidate, unless serious bugs are found.
1959 o Major bugfixes (authority, IPv6):
1960 - Do not consider multiple relays in the same IPv6 /64 network to be
1961 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
1963 o Major bugfixes (directory cache, performance, windows):
1964 - Limit the number of items in the consensus diff cache to 64 on
1965 Windows. We hope this will mitigate an issue where Windows relay
1966 operators reported Tor using 100% CPU, while we investigate better
1967 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
1969 o Minor feature (build system):
1970 - New "make lsp" command to generate the compile_commands.json file
1971 used by the ccls language server. The "bear" program is needed for
1972 this. Closes ticket 40227.
1974 o Minor features (authority, logging):
1975 - Log more information for directory authority operators during the
1976 consensus voting process, and while processing relay descriptors.
1977 Closes ticket 40245.
1978 - Reject obsolete router/extrainfo descriptors earlier and more
1979 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
1982 o Minor bugfixes (compilation):
1983 - Fix another warning about unreachable fallthrough annotations when
1984 building with "--enable-all-bugs-are-fatal" on some compilers.
1985 Fixes bug 40241; bugfix on 0.4.5.3-rc.
1986 - Change the linker flag ordering in our library search code so that
1987 it works for compilers that need the libraries to be listed in the
1988 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
1990 o Minor bugfixes (config, bridge):
1991 - Don't initiate a connection to a bridge configured to use a
1992 missing transport. This change reverts an earlier fix that would
1993 try to avoid such situations during configuration chcecking, but
1994 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
1997 o Minor bugfixes (onion services):
1998 - Avoid a non-fatal assertion in certain edge-cases when
1999 establishing a circuit to an onion service. Fixes bug 32666;
2000 bugfix on 0.3.0.3-alpha.
2002 o Minor bugfixes (relay):
2003 - If we were unable to build our descriptor, don't mark it as having
2004 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
2005 bugfix on 0.4.5.1-alpha.
2008 Changes in version 0.4.5.3-rc - 2021-01-12
2009 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
2010 several bugs, including one that broke onion services on certain older
2011 ARM CPUs, and another that made v3 onion services less reliable.
2013 Though we anticipate that we'll be doing a bit more clean-up between
2014 now and the stable release, we expect that our remaining changes will
2015 be fairly simple. There will be at least one more release candidate
2016 before 0.4.5.x is stable.
2018 o Major bugfixes (onion service v3):
2019 - Stop requiring a live consensus for v3 clients and services, and
2020 allow a "reasonably live" consensus instead. This allows v3 onion
2021 services to work even if the authorities fail to generate a
2022 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
2025 o Minor features (crypto):
2026 - Fix undefined behavior on our Keccak library. The bug only
2027 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
2028 and would result in wrong digests. Fixes bug 40210; bugfix on
2029 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
2030 weasel for diagnosing this.
2032 o Minor features (documentation):
2033 - Mention the "!badexit" directive that can appear in an authority's
2034 approved-routers file, and update the description of the
2035 "!invalid" directive. Closes ticket 40188.
2037 o Minor bugfixes (compilation):
2038 - Fix a compilation warning about unreachable fallthrough
2039 annotations when building with "--enable-all-bugs-are-fatal" on
2040 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
2041 - Fix the "--enable-static-tor" switch to properly set the "-static"
2042 compile option onto the tor binary only. Fixes bug 40111; bugfix
2045 o Minor bugfixes (config, bridge):
2046 - Really fix the case where torrc has a missing ClientTransportPlugin
2047 but is configured with a Bridge line and UseBridges. Previously,
2048 we didn't look at the managed proxy list and thus would fail for
2049 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
2051 o Minor bugfixes (logging, relay):
2052 - Log our address as reported by the directory authorities, if none
2053 was configured or detected before. Fixes bug 40201; bugfix
2055 - When a launching bandwidth testing circuit, don't incorrectly call
2056 it a reachability test, or trigger a "CHECKING_REACHABILITY"
2057 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
2059 o Minor bugfixes (relay, statistics):
2060 - Report the correct connection statistics in our extrainfo
2061 documents. Previously there was a problem in the file loading
2062 function which would wrongly truncate a state file, causing the
2063 wrong information to be reported. Fixes bug 40226; bugfix
2066 o Minor bugfixes (SOCKS5):
2067 - Handle partial SOCKS5 messages correctly. Previously, our code
2068 would send an incorrect error message if it got a SOCKS5 request
2069 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
2072 Changes in version 0.4.5.2-alpha - 2020-11-23
2073 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
2074 It fixes several bugs present in earlier releases, including one that
2075 made it impractical to run relays on Windows. It also adds a few small
2076 safety features to improve Tor's behavior in the presence of strange
2077 compile-time options, misbehaving proxies, and future versions
2080 o Major bugfixes (relay, windows):
2081 - Fix a bug in our implementation of condition variables on Windows.
2082 Previously, a relay on Windows would use 100% CPU after running
2083 for some time. Because of this change, Tor now require Windows
2084 Vista or later to build and run. Fixes bug 30187; bugfix on
2085 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
2086 the introduction of consensus diffs.) Patch by Daniel Pinto.
2088 o Minor features (compilation):
2089 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
2090 later. There are a number of APIs newly deprecated in OpenSSL
2091 3.0.0 that Tor still requires. (A later version of Tor will try to
2092 stop depending on these APIs.) Closes ticket 40165.
2094 o Minor features (protocol, proxy support, defense in depth):
2095 - Respond more deliberately to misbehaving proxies that leave
2096 leftover data on their connections, so as to make Tor even less
2097 likely to allow the proxies to pass their data off as having come
2098 from a relay. Closes ticket 40017.
2100 o Minor features (safety):
2101 - Log a warning at startup if Tor is built with compile-time options
2102 that are likely to make it less stable or reliable. Closes
2105 o Minor bugfixes (circuit, handshake):
2106 - In the v3 handshaking code, use connection_or_change_state() to
2107 change the state. Previously, we changed the state directly, but
2108 this did not pass the state change to the pubsub or channel
2109 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
2110 0.2.3.6-alpha. Patch by Neel Chauhan.
2112 o Minor bugfixes (compilation):
2113 - Use the correct 'ranlib' program when building libtor.a.
2114 Previously we used the default ranlib, which broke some kinds of
2115 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
2116 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
2117 bugfix on 0.4.5.1-alpha.
2118 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
2119 attempt to build. Linux supports that macro but not the BSDs.
2120 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
2122 o Minor bugfixes (configuration):
2123 - Exit Tor on a misconfiguration when the Bridge line is configured
2124 to use a transport but no corresponding ClientTransportPlugin can
2125 be found. Prior to this fix, Tor would attempt to connect to the
2126 bridge directly without using the transport, making it easier for
2127 adversaries to notice the bridge. Fixes bug 25528; bugfix
2129 - Fix an issue where an ORPort was compared with other kinds of
2130 ports, when it should have been only checked against other
2131 ORPorts. This bug would lead to "DirPort auto" getting ignored.
2132 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
2133 - Fix a bug where a second non-ORPort with a variant family (ex:
2134 SocksPort [::1]:9050) would be ignored due to a configuration
2135 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
2137 o Minor bugfixes (crash, relay, signing key):
2138 - Avoid assertion failures when we run Tor from the command line
2139 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
2140 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
2142 o Minor bugfixes (logging):
2143 - Remove trailing whitespace from control event log messages. Fixes
2144 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
2146 - Turn warning-level log message about SENDME failure into a debug-
2147 level message. (This event can happen naturally, and is no reason
2148 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
2150 o Minor bugfixes (relay, address discovery):
2151 - Don't trigger an IP change when no new valid IP can be found.
2152 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
2153 - When attempting to discover our IP, use a simple test circuit,
2154 rather than a descriptor fetch: the same address information is
2155 present in NETINFO cells, and is better authenticated there. Fixes
2156 bug 40071; bugfix on 0.4.5.1-alpha.
2158 o Minor bugfixes (testing):
2159 - Fix the `config/parse_tcp_proxy_line` test so that it works
2160 correctly on systems where the DNS provider hijacks invalid
2161 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
2162 - Fix unit tests that used newly generated list of routers so that
2163 they check them with respect to the date when they were generated,
2164 not with respect to the current time. Fixes bug 40187; bugfix
2166 - Fix our Python reference-implementation for the v3 onion service
2167 handshake so that it works correctly with the version of hashlib
2168 provided by Python 3.9. Fixes part of bug 40179; bugfix
2170 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
2171 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
2173 o Removed features (controller):
2174 - Remove the "GETINFO network-status" controller command. It has
2175 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
2178 Changes in version 0.4.4.6 - 2020-11-12
2179 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
2180 backports fixes from later releases, including a fix for TROVE-2020-
2181 005, a security issue that could be used, under certain cases, by an
2182 adversary to observe traffic patterns on a limited number of circuits
2183 intended for a different relay.
2185 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2186 - When completing a channel, relays now check more thoroughly to
2187 make sure that it matches any pending circuits before attaching
2188 those circuits. Previously, address correctness and Ed25519
2189 identities were not checked in this case, but only when extending
2190 circuits on an existing channel. Fixes bug 40080; bugfix on
2191 0.2.7.2-alpha. Resolves TROVE-2020-005.
2193 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
2194 - Authorities now list a different set of protocols as required and
2195 recommended. These lists have been chosen so that only truly
2196 recommended and/or required protocols are included, and so that
2197 clients using 0.2.9 or later will continue to work (even though
2198 they are not supported), whereas only relays running 0.3.5 or
2199 later will meet the requirements. Closes ticket 40162.
2200 - Make it possible to specify multiple ConsensusParams torrc lines.
2201 Now directory authority operators can for example put the main
2202 ConsensusParams config in one torrc file and then add to it from a
2203 different torrc file. Closes ticket 40164.
2205 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2206 - Tor no longer allows subprotocol versions larger than 63.
2207 Previously version numbers up to UINT32_MAX were allowed, which
2208 significantly complicated our code. Implements proposal 318;
2209 closes ticket 40133.
2211 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2212 - Fix a rendezvous cache unit test that was triggering an underflow
2213 on the global rend cache allocation. Fixes bug 40125; bugfix
2215 - Fix another rendezvous cache unit test that was triggering an
2216 underflow on the global rend cache allocation. Fixes bug 40126;
2217 bugfix on 0.2.8.1-alpha.
2219 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
2220 - Fix compiler warnings that would occur when building with
2221 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2222 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2223 - Resolve a compilation warning that could occur in
2224 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2226 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2227 - Remove a debug logging statement that uselessly spammed the logs.
2228 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2230 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2231 - Avoid a fatal assert() when failing to create a listener
2232 connection for an address that was in use. Fixes bug 40073; bugfix
2235 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2236 - For HSFETCH commands on v2 onion services addresses, check the
2237 length of bytes decoded, not the base32 length. Fixes bug 34400;
2238 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2241 Changes in version 0.4.3.7 - 2020-11-12
2242 Tor 0.4.3.7 backports several bugfixes from later releases. It
2243 includes a fix for TROVE-2020-005, a security issue that could be
2244 used, under certain cases, by an adversary to observe traffic patterns
2245 on a limited number of circuits intended for a different relay.
2247 Please be aware that support for the 0.4.3.x series will end on 15
2248 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2249 downgrade to 0.3.5.x, which will be supported until at least 1
2252 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2253 - Replace the 148 fallback directories originally included in Tor
2254 0.4.1.4-rc (of which around 105 are still functional) with a list
2255 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2257 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2258 - When completing a channel, relays now check more thoroughly to
2259 make sure that it matches any pending circuits before attaching
2260 those circuits. Previously, address correctness and Ed25519
2261 identities were not checked in this case, but only when extending
2262 circuits on an existing channel. Fixes bug 40080; bugfix on
2263 0.2.7.2-alpha. Resolves TROVE-2020-005.
2265 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2266 - When running with NSS enabled, make sure that NSS knows to expect
2267 nonblocking sockets. Previously, we set our TCP sockets as
2268 nonblocking, but did not tell NSS, which in turn could lead to
2269 unexpected blocking behavior. Fixes bug 40035; bugfix
2272 o Minor features (security, backport from 0.4.4.4-rc):
2273 - Channels using obsolete versions of the Tor link protocol are no
2274 longer allowed to circumvent address-canonicity checks. (This is
2275 only a minor issue, since such channels have no way to set ed25519
2276 keys, and therefore should always be rejected for circuits that
2277 specify ed25519 identities.) Closes ticket 40081.
2279 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2280 - Tor no longer allows subprotocol versions larger than 63.
2281 Previously version numbers up to UINT32_MAX were allowed, which
2282 significantly complicated our code. Implements proposal 318;
2283 closes ticket 40133.
2285 o Minor features (tests, backport from 0.4.4.5):
2286 - Our "make check" target now runs the unit tests in 8 parallel
2287 chunks. Doing this speeds up hardened CI builds by more than a
2288 factor of two. Closes ticket 40098.
2290 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2291 - Fix a rendezvous cache unit test that was triggering an underflow
2292 on the global rend cache allocation. Fixes bug 40125; bugfix
2294 - Fix another rendezvous cache unit test that was triggering an
2295 underflow on the global rend cache allocation. Fixes bug 40126;
2296 bugfix on 0.2.8.1-alpha.
2298 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2299 - Fix a correctness bug that could cause an assertion failure if we
2300 ever tried using the buf_move_all() function with an empty input
2301 buffer. As far as we know, no released versions of Tor do this.
2302 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2304 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2305 - Remove a debug logging statement that uselessly spammed the logs.
2306 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2308 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2309 - On a bridge, treat all connections from an ExtORPort as remote by
2310 default for the purposes of rate-limiting. Previously, bridges
2311 would treat the connection as local unless they explicitly
2312 received a "USERADDR" command. ExtORPort connections still count
2313 as local if there is a USERADDR command with an explicit local
2314 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2316 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2317 - Avoid a fatal assert() when failing to create a listener
2318 connection for an address that was in use. Fixes bug 40073; bugfix
2321 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2322 - Adjust the rules for when to warn about having too many
2323 connections to other relays. Previously we'd tolerate up to 1.5
2324 connections per relay on average. Now we tolerate more connections
2325 for directory authorities, and raise the number of total
2326 connections we need to see before we warn. Fixes bug 33880; bugfix
2329 o Minor bugfixes (tests, 0.4.4.5):
2330 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2331 on its own. Previously, it would exit with an error. Fixes bug
2332 40099; bugfix on 0.2.8.1-alpha.
2334 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2335 - For HSFETCH commands on v2 onion services addresses, check the
2336 length of bytes decoded, not the base32 length. Fixes bug 34400;
2337 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2339 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2340 - Fix a bug that prevented Tor from starting if its log file grew
2341 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2343 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2344 - Add a deprecation warning for version 2 onion services. Closes
2347 o Removed features (backport from 0.4.4.3-alpha):
2348 - Our "check-local" test target no longer tries to use the
2349 Coccinelle semantic patching tool parse all the C files. While it
2350 is a good idea to try to make sure Coccinelle works on our C
2351 before we run a Coccinelle patch, doing so on every test run has
2352 proven to be disruptive. You can still run this tool manually with
2353 "make check-cocci". Closes ticket 40030. ticket 40030.
2356 Changes in version 0.3.5.12 - 2020-11-12
2357 Tor 0.4.3.7 backports several bugfixes from later releases. It
2358 includes a fix for TROVE-2020-005, a security issue that could be
2359 used, under certain cases, by an adversary to observe traffic patterns
2360 on a limited number of circuits intended for a different relay.
2362 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2363 - Replace the 148 fallback directories originally included in Tor
2364 0.4.1.4-rc (of which around 105 are still functional) with a list
2365 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2367 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2368 - When completing a channel, relays now check more thoroughly to
2369 make sure that it matches any pending circuits before attaching
2370 those circuits. Previously, address correctness and Ed25519
2371 identities were not checked in this case, but only when extending
2372 circuits on an existing channel. Fixes bug 40080; bugfix on
2373 0.2.7.2-alpha. Resolves TROVE-2020-005.
2375 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2376 - When running with NSS enabled, make sure that NSS knows to expect
2377 nonblocking sockets. Previously, we set our TCP sockets as
2378 nonblocking, but did not tell NSS, which in turn could lead to
2379 unexpected blocking behavior. Fixes bug 40035; bugfix
2382 o Minor features (security, backport from 0.4.4.4-rc):
2383 - Channels using obsolete versions of the Tor link protocol are no
2384 longer allowed to circumvent address-canonicity checks. (This is
2385 only a minor issue, since such channels have no way to set ed25519
2386 keys, and therefore should always be rejected for circuits that
2387 specify ed25519 identities.) Closes ticket 40081.
2389 o Minor features (debugging, directory system):
2390 - Don't crash when we find a non-guard with a guard-fraction value
2391 set. Instead, log a bug warning, in an attempt to figure out how
2392 this happened. Diagnostic for ticket 32868.
2394 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2395 - Tor no longer allows subprotocol versions larger than 63.
2396 Previously version numbers up to UINT32_MAX were allowed, which
2397 significantly complicated our code. Implements proposal 318;
2398 closes ticket 40133.
2400 o Minor features (tests, backport from 0.4.4.5):
2401 - Our "make check" target now runs the unit tests in 8 parallel
2402 chunks. Doing this speeds up hardened CI builds by more than a
2403 factor of two. Closes ticket 40098.
2405 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2406 - Fix a rendezvous cache unit test that was triggering an underflow
2407 on the global rend cache allocation. Fixes bug 40125; bugfix
2409 - Fix another rendezvous cache unit test that was triggering an
2410 underflow on the global rend cache allocation. Fixes bug 40126;
2411 bugfix on 0.2.8.1-alpha.
2413 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2414 - Fix a correctness bug that could cause an assertion failure if we
2415 ever tried using the buf_move_all() function with an empty input
2416 buffer. As far as we know, no released versions of Tor do this.
2417 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2419 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2420 - Remove a debug logging statement that uselessly spammed the logs.
2421 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2423 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2424 - On a bridge, treat all connections from an ExtORPort as remote by
2425 default for the purposes of rate-limiting. Previously, bridges
2426 would treat the connection as local unless they explicitly
2427 received a "USERADDR" command. ExtORPort connections still count
2428 as local if there is a USERADDR command with an explicit local
2429 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2431 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2432 - Avoid a fatal assert() when failing to create a listener
2433 connection for an address that was in use. Fixes bug 40073; bugfix
2436 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2437 - Adjust the rules for when to warn about having too many
2438 connections to other relays. Previously we'd tolerate up to 1.5
2439 connections per relay on average. Now we tolerate more connections
2440 for directory authorities, and raise the number of total
2441 connections we need to see before we warn. Fixes bug 33880; bugfix
2444 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2445 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2446 descriptors, when the IPv6 port was configured as "auto". Fixes
2447 bug 32588; bugfix on 0.2.3.9-alpha.
2449 o Minor bugfixes (tests, 0.4.4.5):
2450 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2451 on its own. Previously, it would exit with an error. Fixes bug
2452 40099; bugfix on 0.2.8.1-alpha.
2454 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2455 - Fix a bug that prevented Tor from starting if its log file grew
2456 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2458 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2459 - Add a deprecation warning for version 2 onion services. Closes
2463 Changes in version 0.4.5.1-alpha - 2020-11-01
2464 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
2465 improves support for IPv6, address discovery and self-testing, code
2466 metrics and tracing.
2468 This release also fixes TROVE-2020-005, a security issue that could be
2469 used, under certain cases, by an adversary to observe traffic patterns
2470 on a limited number of circuits intended for a different relay. To
2471 mount this attack, the adversary would need to actively extend
2472 circuits to an incorrect address, as well as compromise a relay's
2473 legacy RSA-1024 key. We'll be backporting this fix to other release
2474 series soon, after it has had some testing.
2476 Here are the changes since 0.4.4.5.
2478 o Major features (build):
2479 - When building Tor, first link all object files into a single
2480 static library. This may help with embedding Tor in other
2481 programs. Note that most Tor functions do not constitute a part of
2482 a stable or supported API: only those functions in tor_api.h
2483 should be used if embedding Tor. Closes ticket 40127.
2485 o Major features (metrics):
2486 - Introduce a new MetricsPort which exposes, through an HTTP
2487 interface, a series of metrics that tor collects at runtime. At
2488 the moment, the only supported output format is Prometheus data
2489 model. Closes ticket 40063. See the manual page for more
2490 information and security considerations.
2491 o Major features (relay, IPv6):
2492 - The torrc option Address now supports IPv6. This unifies our
2493 address discovery interface to support IPv4, IPv6, and hostnames.
2494 Closes ticket 33233.
2495 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
2496 bridges. Closes ticket 33222.
2497 - Relays now automatically bind on IPv6 for their ORPort, unless
2498 specified otherwise with the IPv4Only flag. Closes ticket 33246.
2499 - When a relay with IPv6 support is told to open a connection to
2500 another relay, and the extend cell lists both IPv4 and IPv6
2501 addresses, the first relay now picks randomly which address to
2502 use. Closes ticket 33220.
2503 - Relays now track their IPv6 ORPort reachability separately from
2504 the reachability of their IPv4 ORPort. They will not publish a
2505 descriptor unless _both_ ports appear to be externally reachable.
2506 Closes ticket 34067.
2508 o Major features (tracing):
2509 - Add event-tracing library support for USDT and LTTng-UST, and a
2510 few tracepoints in the circuit subsystem. More will come
2511 incrementally. This feature is compiled out by default: it needs
2512 to be enabled at configure time. See documentation in
2513 doc/HACKING/Tracing.md. Closes ticket 32910.
2515 o Major bugfixes (security):
2516 - When completing a channel, relays now check more thoroughly to
2517 make sure that it matches any pending circuits before attaching
2518 those circuits. Previously, address correctness and Ed25519
2519 identities were not checked in this case, but only when extending
2520 circuits on an existing channel. Fixes bug 40080; bugfix on
2521 0.2.7.2-alpha. Resolves TROVE-2020-005.
2523 o Major bugfixes (TLS, buffer):
2524 - When attempting to read N bytes on a TLS connection, really try to
2525 read all N bytes. Previously, Tor would stop reading after the
2526 first TLS record, which can be smaller than the N bytes requested,
2527 and not check for more data until the next mainloop event. Fixes
2528 bug 40006; bugfix on 0.1.0.5-rc.
2530 o Minor features (address discovery):
2531 - If no Address statements are found, relays now prioritize guessing
2532 their address by looking at the local interface instead of the
2533 local hostname. If the interface address can't be found, the local
2534 hostname is used. Closes ticket 33238.
2536 o Minor features (admin tools):
2537 - Add a new --format argument to -key-expiration option to allow
2538 specifying the time format of the expiration date. Adds Unix
2539 timestamp format support. Patch by Daniel Pinto. Closes
2542 o Minor features (bootstrap reporting):
2543 - When reporting bootstrapping status on a relay, do not consider
2544 connections that have never been the target of an origin circuit.
2545 Previously, all connection failures were treated as potential
2546 bootstrapping failures, including connections that had been opened
2547 because of client requests. Closes ticket 25061.
2549 o Minor features (build):
2550 - When running the configure script, try to detect version
2551 mismatches between the OpenSSL headers and libraries, and suggest
2552 that the user should try "--with-openssl-dir". Closes 40138.
2553 - If the configure script has given any warnings, remind the user
2554 about them at the end of the script. Related to 40138.
2556 o Minor features (configuration):
2557 - Allow using wildcards (* and ?) with the %include option on
2558 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
2559 - Allow the configuration options EntryNodes, ExcludeNodes,
2560 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
2561 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
2562 Patch by Daniel Pinto.
2564 o Minor features (control port):
2565 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2566 and reset the current timeout. Closes ticket 40002.
2567 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2568 send a control port event. Closes ticket 32190. Patch by
2570 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2571 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2572 onion handshake counts respectively. Closes ticket 28279. Patch by
2575 o Minor features (control port, IPv6):
2576 - Tor relays now try to report to the controller when they are
2577 launching an IPv6 self-test. Closes ticket 34068.
2578 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2579 control port to fetch the Tor host's respective IPv4 or IPv6
2580 address. We keep "GETINFO address" for backwards-compatibility.
2581 Closes ticket 40039. Patch by Neel Chauhan.
2583 o Minor features (directory authorities):
2584 - Authorities now list a different set of protocols as required and
2585 recommended. These lists have been chosen so that only truly
2586 recommended and/or required protocols are included, and so that
2587 clients using 0.2.9 or later will continue to work (even though
2588 they are not supported), whereas only relays running 0.3.5 or
2589 later will meet the requirements. Closes ticket 40162.
2590 - Add a new consensus method 30 that removes the unnecessary "="
2591 padding from ntor-onion-key. Closes ticket 7869. Patch by
2593 - Directory authorities now reject descriptors from relays running
2594 Tor versions from the obsolete 0.4.1 series. Resolves ticket
2595 34357. Patch by Neel Chauhan.
2596 - Make it possible to specify multiple ConsensusParams torrc lines.
2597 Now directory authority operators can for example put the main
2598 ConsensusParams config in one torrc file and then add to it from a
2599 different torrc file. Closes ticket 40164.
2600 - The AssumeReachable option no longer stops directory authorities
2601 from checking whether other relays are running. A new
2602 AuthDirTestReachability option can be used to disable these
2603 checks. Closes ticket 34445.
2604 - When looking for possible Sybil attacks, also consider IPv6
2605 addresses. Two routers are considered to have "the same" address
2606 by this metric if they are in the same /64 network. Patch from
2607 Maurice Pibouin. Closes ticket 7193.
2609 o Minor features (directory authorities, IPv6):
2610 - Make authorities add their IPv6 ORPort (if any) to the trusted
2611 servers list. Authorities previously added only their IPv4
2612 addresses. Closes ticket 32822.
2614 o Minor features (ed25519, relay):
2615 - Save a relay's base64-encoded ed25519 identity key to the data
2616 directory in a file named fingerprint-ed25519. Closes ticket
2617 30642. Patch by Neel Chauhan.
2619 o Minor features (heartbeat):
2620 - Include the total number of inbound and outbound IPv4 and IPv6
2621 connections in the heartbeat message. Closes ticket 29113.
2623 o Minor features (IPv6, ExcludeNodes):
2624 - Handle IPv6 addresses in ExcludeNodes; previously they were
2625 ignored. Closes ticket 34065. Patch by Neel Chauhan.
2627 o Minor features (logging):
2628 - Add the running glibc version to the log, and the compiled glibc
2629 version to the library list returned when using --library-versions.
2630 Patch from Daniel Pinto. Closes ticket 40047.
2631 - Consider an HTTP 301 response to be an error (like a 404) when
2632 processing a directory response. Closes ticket 40053.
2633 - Log directory fetch statistics as a single line. Closes
2635 - Provide more complete descriptions of our connections when logging
2636 about them. Closes ticket 40041.
2637 - When describing a relay in the logs, we now include its ed25519
2638 identity. Closes ticket 22668.
2640 o Minor features (onion services):
2641 - Only overwrite an onion service's existing hostname file if its
2642 contents are wrong. This enables read-only onion-service
2643 directories. Resolves ticket 40062. Patch by Neel Chauhan.
2645 o Minor features (pluggable transports):
2646 - Add an OutboundBindAddressPT option to allow users to specify
2647 which IPv4 and IPv6 address pluggable transports should use for
2648 outgoing IP packets. Tor does not have a way to enforce that the
2649 pluggable transport honors this option, so each pluggable transport
2650 needs to implement support on its own. Closes ticket 5304.
2652 o Minor features (relay address tracking):
2653 - We now store relay addresses for OR connections in a more logical
2654 way. Previously we would sometimes overwrite the actual address of
2655 a connection with a "canonical address", and then store the "real
2656 address" elsewhere to remember it. We now track the "canonical
2657 address" elsewhere for the cases where we need it, and leave the
2658 connection's address alone. Closes ticket 33898.
2660 o Minor features (relay):
2661 - If a relay is unable to discover its address, attempt to learn it
2662 from the NETINFO cell. Closes ticket 40022.
2663 - Log immediately when launching a relay self-check. Previously we
2664 would try to log before launching checks, or approximately when we
2665 intended to launch checks, but this tended to be error-prone.
2666 Closes ticket 34137.
2668 o Minor features (relay, address discovery):
2669 - If Address option is not found in torrc, attempt to learn our
2670 address with the configured ORPort address if any. Closes
2673 o Minor features (relay, IPv6):
2674 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
2675 reachability. Closes part of ticket 33224.
2676 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
2677 parameters to be used in an emergency to tell relays that they
2678 should publish even if they cannot complete their ORPort self-
2679 checks. Closes ticket 34064 and part of 33224.
2680 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
2681 - Declare support for the Relay=3 subprotocol version. Closes
2683 - When launching IPv6 ORPort self-test circuits, make sure that the
2684 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
2686 o Minor features (specification update):
2687 - Several fields in microdescriptors, router descriptors, and
2688 consensus documents that were formerly optional are now required.
2689 Implements proposal 315; closes ticket 40132.
2691 o Minor features (state management):
2692 - When loading the state file, remove entries from the statefile
2693 that have been obsolete for a long time. Ordinarily Tor preserves
2694 unrecognized entries in order to keep forward-compatibility, but
2695 these entries have not actually been used in any release since
2696 before 0.3.5.x. Closes ticket 40137.
2698 o Minor features (statistics, ipv6):
2699 - Relays now publish IPv6-specific counts of single-direction versus
2700 bidirectional relay connections. Closes ticket 33264.
2701 - Relays now publish their IPv6 read and write statistics over time,
2702 if statistics are enabled. Closes ticket 33263.
2704 o Minor features (subprotocol versions):
2705 - Tor no longer allows subprotocol versions larger than 63.
2706 Previously version numbers up to UINT32_MAX were allowed, which
2707 significantly complicated our code. Implements proposal 318;
2708 closes ticket 40133.
2709 - Use the new limitations on subprotocol versions due to proposal
2710 318 to simplify our implementation. Part of ticket 40133.
2712 o Minor features (testing configuration):
2713 - The TestingTorNetwork option no longer implicitly sets
2714 AssumeReachable to 1. This change allows us to test relays' self-
2715 testing mechanisms, and to test authorities' relay-testing
2716 functionality. Closes ticket 34446.
2718 o Minor features (testing):
2719 - Added unit tests for channel_matches_target_addr_for_extend().
2720 Closes Ticket 33919. Patch by MrSquanchee.
2722 o Minor features (tests, v2 onion services):
2723 - Fix a rendezvous cache unit test that was triggering an underflow
2724 on the global rend cache allocation. Fixes bug 40125; bugfix
2726 - Fix another rendezvous cache unit test that was triggering an
2727 underflow on the global rend cache allocation. Fixes bug 40126;
2728 bugfix on 0.2.8.1-alpha.
2730 o Minor bugfixes (circuit padding):
2731 - When circpad_send_padding_cell_for_callback is called,
2732 `is_padding_timer_scheduled` flag was not reset. Now it is set to
2733 0 at the top of that function. Fixes bug 32671; bugfix
2735 - Add a per-circuit padding machine instance counter, so we can
2736 differentiate between shutdown requests for old machines on a
2737 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
2738 - Add the ability to keep circuit padding machines if they match a
2739 set of circuit states or purposes. This allows us to have machines
2740 that start up under some conditions but don't shut down under
2741 others. We now use this mask to avoid starting up introduction
2742 circuit padding again after the machines have already completed.
2743 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
2745 o Minor bugfixes (compatibility):
2746 - Strip '\r' characters when reading text files on Unix platforms.
2747 This should resolve an issue where a relay operator migrates a
2748 relay from Windows to Unix, but does not change the line ending of
2749 Tor's various state files to match the platform, and the CRLF line
2750 endings from Windows end up leaking into other files such as the
2751 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2753 o Minor bugfixes (compilation):
2754 - Fix compiler warnings that would occur when building with
2755 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2756 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2757 - Resolve a compilation warning that could occur in
2758 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2760 o Minor bugfixes (configuration):
2761 - Fix bug where %including a pattern ending with */ would include
2762 files and folders (instead of folders only) in versions of glibc <
2763 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
2766 o Minor bugfixes (control port):
2767 - Make sure we send the SOCKS request address in relay begin cells
2768 when a stream is attached with the purpose
2769 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
2770 Patch by Neel Chauhan.
2772 o Minor bugfixes (logging):
2773 - Remove a debug logging statement that uselessly spammed the logs.
2774 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2775 - When logging a rate-limited message about how many messages have
2776 been suppressed in the last N seconds, give an accurate value for
2777 N, rounded up to the nearest minute. Previously we would report
2778 the size of the rate-limiting interval, regardless of when the
2779 messages started to occur. Fixes bug 19431; bugfix
2782 o Minor bugfixes (relay configuration, crash):
2783 - Avoid a fatal assert() when failing to create a listener
2784 connection for an address that was in use. Fixes bug 40073; bugfix
2787 o Minor bugfixes (rust, protocol versions):
2788 - Declare support for the onion service introduction point denial of
2789 service extensions when building with Rust. Fixes bug 34248;
2790 bugfix on 0.4.2.1-alpha.
2791 - Make Rust protocol version support checks consistent with the
2792 undocumented error behavior of the corresponding C code. Fixes bug
2793 34251; bugfix on 0.3.3.5-rc.
2795 o Minor bugfixes (self-testing):
2796 - When receiving an incoming circuit, only accept it as evidence
2797 that we are reachable if the declared address of its channel is
2798 the same address we think that we have. Otherwise, it could be
2799 evidence that we're reachable on some other address. Fixes bug
2800 20165; bugfix on 0.1.0.1-rc.
2802 o Minor bugfixes (spec conformance):
2803 - Use the correct key type when generating signing->link
2804 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
2806 o Minor bugfixes (subprotocol versions):
2807 - Consistently reject extra commas, instead of only rejecting
2808 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
2809 - In summarize_protover_flags(), treat empty strings the same as
2810 NULL. This prevents protocols_known from being set. Previously, we
2811 treated empty strings as normal strings, which led to
2812 protocols_known being set. Fixes bug 34232; bugfix on
2813 0.3.3.2-alpha. Patch by Neel Chauhan.
2815 o Minor bugfixes (v2 onion services):
2816 - For HSFETCH commands on v2 onion services addresses, check the
2817 length of bytes decoded, not the base32 length. Fixes bug 34400;
2818 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2820 o Code simplification and refactoring:
2821 - Add and use a set of functions to perform down-casts on constant
2822 connection and channel pointers. Closes ticket 40046.
2823 - Refactor our code that logs descriptions of connections, channels,
2824 and the peers on them, to use a single call path. This change
2825 enables us to refactor the data types that they use, and eliminates
2826 many confusing usages of those types. Closes ticket 40041.
2827 - Refactor some common node selection code into a single function.
2828 Closes ticket 34200.
2829 - Remove the now-redundant 'outbuf_flushlen' field from our
2830 connection type. It was previously used for an older version of
2831 our rate-limiting logic. Closes ticket 33097.
2832 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
2833 instead, for consistency with other code. Closes ticket 18106.
2834 - Rename functions about "advertised" ports which are not in fact
2835 guaranteed to return the ports that have been advertised. Closes
2837 - Split implementation of several command line options from
2838 options_init_from_torrc into smaller isolated functions. Patch by
2839 Daniel Pinto. Closes ticket 40102.
2840 - When an extend cell is missing an IPv4 or IPv6 address, fill in
2841 the address from the extend info. This is similar to what was done
2842 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
2845 o Deprecated features:
2846 - The "non-builtin" argument to the "--dump-config" command is now
2847 deprecated. When it works, it behaves the same as "short", which
2848 you should use instead. Closes ticket 33398.
2851 - Replace URLs from our old bugtracker so that they refer to the new
2852 bugtracker and wiki. Closes ticket 40101.
2855 - We no longer ship or build a "tor.service" file for use with
2856 systemd. No distribution included this script unmodified, and we
2857 don't have the expertise ourselves to maintain this in a way that
2858 all the various systemd-based distributions can use. Closes
2860 - We no longer ship support for the Android logging API. Modern
2861 versions of Android can use the syslog API instead. Closes
2863 - The "optimistic data" feature is now always on; there is no longer
2864 an option to disable it from the torrc file or from the consensus
2865 directory. Closes part of 40139.
2866 - The "usecreatefast" network parameter is now removed; there is no
2867 longer an option for authorities to turn it off. Closes part
2871 - Add unit tests for bandwidth statistics manipulation functions.
2872 Closes ticket 33812. Patch by MrSquanchee.
2874 o Code simplification and refactoring (autoconf):
2875 - Remove autoconf checks for unused funcs and headers. Closes ticket
2876 31699; Patch by @bduszel
2878 o Code simplification and refactoring (maintainer scripts):
2879 - Disable by default the pre-commit hook. Use the environment
2880 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
2881 Furthermore, stop running practracker in the pre-commit hook and
2882 make check-local. Closes ticket 40019.
2884 o Code simplification and refactoring (relay address):
2885 - Most of IPv4 representation was using "uint32_t". It has now been
2886 moved to use the internal "tor_addr_t" interface instead. This is
2887 so we can properly integrate IPv6 along IPv4 with common
2888 interfaces. Closes ticket 40043.
2890 o Documentation (manual page):
2891 - Move them from doc/ to doc/man/. Closes ticket 40044.
2892 - Describe the status of the "Sandbox" option more accurately. It is
2893 no longer "experimental", but it _is_ dependent on kernel and libc
2894 versions. Closes ticket 23378.
2896 o Documentation (tracing):
2897 - Document in depth the circuit subsystem trace events in the new
2898 doc/tracing/EventsCircuit.md. Closes ticket 40036.
2901 Changes in version 0.4.4.5 - 2020-09-15
2902 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
2903 series improves our guard selection algorithms, adds v3 onion balance
2904 support, improves the amount of code that can be disabled when running
2905 without relay support, and includes numerous small bugfixes and
2906 enhancements. It also lays the ground for some IPv6 features that
2907 we'll be developing more in the next (0.4.5) series.
2909 Per our support policy, we support each stable release series for nine
2910 months after its first stable release, or three months after the first
2911 stable release of the next series: whichever is longer. This means
2912 that 0.4.4.x will be supported until around June 2021--or later, if
2913 0.4.5.x is later than anticipated.
2915 Note also that support for 0.4.2.x has just ended; support for 0.4.3
2916 will continue until Feb 15, 2021. We still plan to continue supporting
2917 0.3.5.x, our long-term stable series, until Feb 2022.
2919 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2920 since 0.4.3.6, see the ReleaseNotes file.
2922 o Major bugfixes (onion services, DoS):
2923 - Correct handling of parameters for the onion service DoS defense.
2924 Previously, the consensus parameters for the onion service DoS
2925 defenses were overwriting the parameters set by the service
2926 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
2927 40109; bugfix on 0.4.2.1-alpha.
2929 o Major bugfixes (stats, onion services):
2930 - Fix a bug where we were undercounting the Tor network's total
2931 onion service traffic, by ignoring any traffic originating from
2932 clients. Now we count traffic from both clients and services.
2933 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2935 o Minor features (control port):
2936 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
2937 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
2938 Closes ticket 40089. Patch by Neel Chauhan.
2940 o Minor features (denial-of-service memory limiter):
2941 - Allow the user to configure even lower values for the
2942 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
2943 when previously the minimum was 256 MB. On clients, there is no
2944 minimum. Relays and clients will both warn if the value is set so
2945 low that Tor is likely to stop working. Closes ticket 24308.
2947 o Minor features (tests):
2948 - Our "make check" target now runs the unit tests in 8 parallel
2949 chunks. Doing this speeds up hardened CI builds by more than a
2950 factor of two. Closes ticket 40098.
2952 o Minor bugfixes (guard selection algorithm):
2953 - Avoid needless guard-related warning when upgrading from 0.4.3 to
2954 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
2956 o Minor bugfixes (tests):
2957 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2958 on its own. Previously, it would exit with an error. Fixes bug
2959 40099; bugfix on 0.2.8.1-alpha.
2962 Changes in version 0.4.4.3-alpha - 2020-07-27
2963 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
2964 including one affecting NSS users, and several affecting the Linux
2967 o Major features (fallback directory list):
2968 - Replace the 148 fallback directories originally included in Tor
2969 0.4.1.4-rc (of which around 105 are still functional) with a list
2970 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2972 o Major bugfixes (NSS):
2973 - When running with NSS enabled, make sure that NSS knows to expect
2974 nonblocking sockets. Previously, we set our TCP sockets as
2975 nonblocking, but did not tell NSS, which in turn could lead to
2976 unexpected blocking behavior. Fixes bug 40035; bugfix
2979 o Minor bugfixes (linux seccomp2 sandbox):
2980 - Fix a regression on sandboxing rules for the openat() syscall. The
2981 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
2982 but broke with versions of glibc. We now choose a rule based on
2983 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
2985 - Makes the seccomp sandbox allow the correct syscall for opendir
2986 according to the running glibc version. This fixes crashes when
2987 reloading torrc with sandbox enabled when running on glibc 2.15 to
2988 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
2991 o Minor bugfixes (relay, usability):
2992 - Adjust the rules for when to warn about having too many
2993 connections to other relays. Previously we'd tolerate up to 1.5
2994 connections per relay on average. Now we tolerate more connections
2995 for directory authorities, and raise the number of total
2996 connections we need to see before we warn. Fixes bug 33880; bugfix
3000 - Replace most http:// URLs in our code and documentation with
3001 https:// URLs. (We have left unchanged the code in src/ext/, and
3002 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
3005 - Our "check-local" test target no longer tries to use the
3006 Coccinelle semantic patching tool parse all the C files. While it
3007 is a good idea to try to make sure Coccinelle works on our C
3008 before we run a Coccinelle patch, doing so on every test run has
3009 proven to be disruptive. You can still run this tool manually with
3010 "make check-cocci". Closes ticket 40030.
3013 Changes in version 0.3.5.11 - 2020-07-09
3014 Tor 0.3.5.11 backports fixes from later tor releases, including several
3015 usability, portability, and reliability fixes.
3017 This release also fixes TROVE-2020-001, a medium-severity denial of
3018 service vulnerability affecting all versions of Tor when compiled with
3019 the NSS encryption library. (This is not the default configuration.)
3020 Using this vulnerability, an attacker could cause an affected Tor
3021 instance to crash remotely. This issue is also tracked as CVE-2020-
3022 15572. Anybody running a version of Tor built with the NSS library
3023 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3026 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3027 - Fix a crash due to an out-of-bound memory access when Tor is
3028 compiled with NSS support. Fixes bug 33119; bugfix on
3029 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3032 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3033 - Fix a bug that was preventing DoS defenses from running on bridges
3034 with a pluggable transport. Previously, the DoS subsystem was not
3035 given the transport name of the client connection, thus failed to
3036 find the GeoIP cache entry for that client address. Fixes bug
3037 33491; bugfix on 0.3.3.2-alpha.
3039 o Minor features (testing, backport from 0.4.3.4-rc):
3040 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3041 variable to specify a list of space-separated test cases that
3042 should not be executed. We will use this to disable certain tests
3043 that are failing on Appveyor because of mismatched OpenSSL
3044 libraries. Part of ticket 33643.
3046 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3047 - Use the correct 64-bit printf format when compiling with MINGW on
3048 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3050 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3051 - Warn if the ContactInfo field is not set, and tell the relay
3052 operator that not having a ContactInfo field set might cause their
3053 relay to get rejected in the future. Fixes bug 33361; bugfix
3056 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3057 - Resume use of preemptively-built circuits when UseEntryGuards is set
3058 to 0. We accidentally disabled this feature with that config
3059 setting, leading to slower load times. Fixes bug 34303; bugfix
3062 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3063 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3064 style "/* falls through */" comments. Both Clang and GCC allow
3065 __attribute__((fallthrough)) instead, so that's what we're using
3066 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3068 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3069 - Fix a compiler warning on platforms with 32-bit time_t values.
3070 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3072 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3073 - When starting Tor any time after the first time in a process,
3074 register the thread in which it is running as the main thread.
3075 Previously, we only did this on Windows, which could lead to bugs
3076 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3079 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3080 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3081 if we are not running on Windows. Previously, non-Windows hosts
3082 would reject these line-endings in certain positions, making
3083 certain key files hard to move from one host to another. Fixes bug
3084 33032; bugfix on 0.3.5.1-alpha.
3086 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3087 - Downgrade a noisy log message that could occur naturally when
3088 receiving an extrainfo document that we no longer want. Fixes bug
3089 16016; bugfix on 0.2.6.3-alpha.
3091 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3092 - Remove a BUG() warning that would cause a stack trace if an onion
3093 service descriptor was freed while we were waiting for a
3094 rendezvous circuit to complete. Fixes bug 28992; bugfix
3097 o Testing (CI, backport from 0.4.3.4-rc):
3098 - In our Appveyor Windows CI, copy required DLLs to test and app
3099 directories, before running tor's tests. This ensures that tor.exe
3100 and test*.exe use the correct version of each DLL. This fix is not
3101 required, but we hope it will avoid DLL search issues in future.
3102 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3103 - On Appveyor, skip the crypto/openssl_version test, which is
3104 failing because of a mismatched library installation. Fix
3108 Changes in version 0.4.2.8 - 2020-07-09
3109 Tor 0.4.2.8 backports various fixes from later releases, including
3110 several that affect usability and portability.
3112 This release also fixes TROVE-2020-001, a medium-severity denial of
3113 service vulnerability affecting all versions of Tor when compiled with
3114 the NSS encryption library. (This is not the default configuration.)
3115 Using this vulnerability, an attacker could cause an affected Tor
3116 instance to crash remotely. This issue is also tracked as CVE-2020-
3117 15572. Anybody running a version of Tor built with the NSS library
3118 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3121 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3122 - Fix a crash due to an out-of-bound memory access when Tor is
3123 compiled with NSS support. Fixes bug 33119; bugfix on
3124 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3127 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
3128 - Fix a bug that was preventing DoS defenses from running on bridges
3129 with a pluggable transport. Previously, the DoS subsystem was not
3130 given the transport name of the client connection, thus failed to
3131 find the GeoIP cache entry for that client address. Fixes bug
3132 33491; bugfix on 0.3.3.2-alpha.
3134 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
3135 - Default to sending SENDME version 1 cells. (Clients are already
3136 sending these, because of a consensus parameter telling them to do
3137 so: this change only affects what clients would do if the
3138 consensus didn't contain a recommendation.) Closes ticket 33623.
3140 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
3141 - Improve assertions and add some memory-poisoning code to try to
3142 track down possible causes of a rare crash (32564) in the EWMA
3143 code. Closes ticket 33290.
3145 o Minor features (testing, backport from 0.4.3.4-rc):
3146 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3147 variable to specify a list of space-separated test cases that
3148 should not be executed. We will use this to disable certain tests
3149 that are failing on Appveyor because of mismatched OpenSSL
3150 libraries. Part of ticket 33643.
3152 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3153 - Use the correct 64-bit printf format when compiling with MINGW on
3154 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3156 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
3157 - Warn if the ContactInfo field is not set, and tell the relay
3158 operator that not having a ContactInfo field set might cause their
3159 relay to get rejected in the future. Fixes bug 33361; bugfix
3162 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3163 - Resume use of preemptively-built circuits when UseEntryGuards is set
3164 to 0. We accidentally disabled this feature with that config
3165 setting, leading to slower load times. Fixes bug 34303; bugfix
3168 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
3169 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3170 style "/* falls through */" comments. Both Clang and GCC allow
3171 __attribute__((fallthrough)) instead, so that's what we're using
3172 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3173 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3176 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3177 - Fix a compiler warning on platforms with 32-bit time_t values.
3178 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3180 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
3181 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3182 report them as SIGNAL events. Previously we would log a bug
3183 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3185 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
3186 - When starting Tor any time after the first time in a process,
3187 register the thread in which it is running as the main thread.
3188 Previously, we only did this on Windows, which could lead to bugs
3189 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3192 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
3193 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3194 if we are not running on Windows. Previously, non-Windows hosts
3195 would reject these line-endings in certain positions, making
3196 certain key files hard to move from one host to another. Fixes bug
3197 33032; bugfix on 0.3.5.1-alpha.
3199 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
3200 - When logging a bug, do not say "Future instances of this warning
3201 will be silenced" unless we are actually going to silence them.
3202 Previously we would say this whenever a BUG() check failed in the
3203 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3205 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
3206 - Flush stderr, stdout, and file logs during shutdown, if supported
3207 by the OS. This change helps make sure that any final logs are
3208 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3210 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3211 - Downgrade a noisy log message that could occur naturally when
3212 receiving an extrainfo document that we no longer want. Fixes bug
3213 16016; bugfix on 0.2.6.3-alpha.
3215 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
3216 - Remove a BUG() warning that would cause a stack trace if an onion
3217 service descriptor was freed while we were waiting for a
3218 rendezvous circuit to complete. Fixes bug 28992; bugfix
3221 o Testing (CI, backport from 0.4.3.4-rc):
3222 - In our Appveyor Windows CI, copy required DLLs to test and app
3223 directories, before running tor's tests. This ensures that tor.exe
3224 and test*.exe use the correct version of each DLL. This fix is not
3225 required, but we hope it will avoid DLL search issues in future.
3226 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3227 - On Appveyor, skip the crypto/openssl_version test, which is
3228 failing because of a mismatched library installation. Fix
3232 Changes in version 0.4.3.6 - 2020-07-09
3233 Tor 0.4.3.6 backports several bugfixes from later releases, including
3234 some affecting usability.
3236 This release also fixes TROVE-2020-001, a medium-severity denial of
3237 service vulnerability affecting all versions of Tor when compiled with
3238 the NSS encryption library. (This is not the default configuration.)
3239 Using this vulnerability, an attacker could cause an affected Tor
3240 instance to crash remotely. This issue is also tracked as CVE-2020-
3241 15572. Anybody running a version of Tor built with the NSS library
3242 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3245 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3246 - Fix a crash due to an out-of-bound memory access when Tor is
3247 compiled with NSS support. Fixes bug 33119; bugfix on
3248 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3251 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3252 - Use the correct 64-bit printf format when compiling with MINGW on
3253 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3255 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3256 - Resume use of preemptively-built circuits when UseEntryGuards is set
3257 to 0. We accidentally disabled this feature with that config
3258 setting, leading to slower load times. Fixes bug 34303; bugfix
3261 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3262 - Fix a compiler warning on platforms with 32-bit time_t values.
3263 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3265 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3266 - Fix a startup crash when tor is compiled with --enable-nss and
3267 sandbox support is enabled. Fixes bug 34130; bugfix on
3268 0.3.5.1-alpha. Patch by Daniel Pinto.
3270 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3271 - Downgrade a noisy log message that could occur naturally when
3272 receiving an extrainfo document that we no longer want. Fixes bug
3273 16016; bugfix on 0.2.6.3-alpha.
3275 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3276 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3277 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3279 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3280 - Prevent an assert() that would occur when cleaning the client
3281 descriptor cache, and attempting to close circuits for a non-
3282 decrypted descriptor (lacking client authorization). Fixes bug
3283 33458; bugfix on 0.4.2.1-alpha.
3285 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3286 - Fix a portability error in the configure script, where we were
3287 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3289 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3290 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3291 descriptors, when the IPv6 port was configured as "auto". Fixes
3292 bug 32588; bugfix on 0.2.3.9-alpha.
3294 o Documentation (backport from 0.4.4.1-alpha):
3295 - Fix several doxygen warnings related to imbalanced groups. Closes
3299 Changes in version 0.4.4.2-alpha - 2020-07-09
3300 This is the second alpha release in the 0.4.4.x series. It fixes a few
3301 bugs in the previous release, and solves a few usability,
3302 compatibility, and portability issues.
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):
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 features (bootstrap reporting):
3320 - Report more detailed reasons for bootstrap failure when the
3321 failure happens due to a TLS error. Previously we would just call
3322 these errors "MISC" when they happened during read, and "DONE"
3323 when they happened during any other TLS operation. Closes
3326 o Minor features (directory authority):
3327 - Authorities now recommend the protocol versions that are supported
3328 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3329 deprecated since January of this year.) This recommendation will
3330 cause older clients and relays to give a warning on startup, or
3331 when they download a consensus directory. Closes ticket 32696.
3333 o Minor features (entry guards):
3334 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3335 Closes ticket 40001.
3337 o Minor features (linux seccomp2 sandbox, portability):
3338 - Allow Tor to build on platforms where it doesn't know how to
3339 report which syscall caused the linux seccomp2 sandbox to fail.
3340 This change should make the sandbox code more portable to less
3341 common Linux architectures. Closes ticket 34382.
3342 - Permit the unlinkat() syscall, which some Libc implementations use
3343 to implement unlink(). Closes ticket 33346.
3345 o Minor bugfix (CI, Windows):
3346 - Use the correct 64-bit printf format when compiling with MINGW on
3347 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3349 o Minor bugfix (onion service v3 client):
3350 - Remove a BUG() warning that could occur naturally. Fixes bug
3351 34087; bugfix on 0.3.2.1-alpha.
3353 o Minor bugfix (SOCKS, onion service client):
3354 - Detect v3 onion service addresses of the wrong length when
3355 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3358 o Minor bugfixes (compiler warnings):
3359 - Fix a compiler warning on platforms with 32-bit time_t values.
3360 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3362 o Minor bugfixes (control port, onion service):
3363 - Consistently use 'address' in "Invalid v3 address" response to
3364 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3365 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3367 o Minor bugfixes (logging):
3368 - Downgrade a noisy log message that could occur naturally when
3369 receiving an extrainfo document that we no longer want. Fixes bug
3370 16016; bugfix on 0.2.6.3-alpha.
3372 o Minor bugfixes (onion services v3):
3373 - Avoid a non-fatal assertion failure in certain edge-cases when
3374 opening an intro circuit as a client. Fixes bug 34084; bugfix
3377 o Deprecated features (onion service v2):
3378 - Add a deprecation warning for version 2 onion services. Closes
3381 o Removed features (IPv6, revert):
3382 - Revert the change in the default value of ClientPreferIPv6OrPort:
3383 it breaks the torsocks use case. The SOCKS resolve command has no
3384 mechanism to ask for a specific address family (v4 or v6), and so
3385 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3386 interface resulted in a failure. Tor Browser explicitly sets
3387 PreferIPv6, so this should not affect the majority of our users.
3388 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3391 Changes in version 0.4.4.1-alpha - 2020-06-16
3392 This is the first alpha release in the 0.4.4.x series. It improves
3393 our guard selection algorithms, improves the amount of code that
3394 can be disabled when running without relay support, and includes numerous
3395 small bugfixes and enhancements. It also lays the ground for some IPv6
3396 features that we'll be developing more in the next (0.4.5) series.
3398 Here are the changes since 0.4.3.5.
3400 o Major features (Proposal 310, performance + security):
3401 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3402 310 solves load-balancing issues with older versions of the guard
3403 selection algorithm, and improves its security. Under this new
3404 algorithm, a newly selected guard never becomes Primary unless all
3405 previously sampled guards are unreachable. Implements
3406 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3407 project researching optimal client location-aware path selections.
3408 This project is a collaboration between the UCLouvain Crypto Group,
3409 the U.S. Naval Research Laboratory, and Princeton University.)
3411 o Major features (IPv6, relay):
3412 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3413 warning if the IPv4 or IPv6 address is an internal address, and
3414 internal addresses are not allowed. But continue to use the other
3415 address, if it is valid. Closes ticket 33817.
3416 - If a relay can extend over IPv4 and IPv6, and both addresses are
3417 provided, it chooses between them uniformly at random. Closes
3419 - Re-use existing IPv6 connections for circuit extends. Closes
3421 - Relays may extend circuits over IPv6, if the relay has an IPv6
3422 ORPort, and the client supplies the other relay's IPv6 ORPort in
3423 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3424 ORPort self-tests in 33222. Closes ticket 33817.
3426 o Major features (v3 onion services):
3427 - Allow v3 onion services to act as OnionBalance backend instances,
3428 by using the HiddenServiceOnionBalanceInstance torrc option.
3429 Closes ticket 32709.
3431 o Minor feature (developer tools):
3432 - Add a script to help check the alphabetical ordering of option
3433 names in the manual page. Closes ticket 33339.
3435 o Minor feature (onion service client, SOCKS5):
3436 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3437 new type of onion service connection failures. The semantics of
3438 these error codes are documented in proposal 309. Closes
3441 o Minor feature (onion service v3):
3442 - If a service cannot upload its descriptor(s), log why at INFO
3443 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
3445 o Minor feature (python scripts):
3446 - Stop assuming that /usr/bin/python exists. Instead of using a
3447 hardcoded path in scripts that still use Python 2, use
3448 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
3449 bug 33192; bugfix on 0.4.2.
3451 o Minor features (client-only compilation):
3452 - Disable more code related to the ext_orport protocol when
3453 compiling without support for relay mode. Closes ticket 33368.
3454 - Disable more of our self-testing code when support for relay mode
3455 is disabled. Closes ticket 33370.
3457 o Minor features (code safety):
3458 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
3459 functions in DNS and IP address processing code, and adjust
3460 codepaths to make them less likely to crash entire Tor instances.
3461 Resolves issue 33788.
3463 o Minor features (compilation size):
3464 - Most server-side DNS code is now disabled when building without
3465 support for relay mode. Closes ticket 33366.
3467 o Minor features (continuous integration):
3468 - Run unit-test and integration test (Stem, Chutney) jobs with
3469 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
3470 Resolves ticket 32143.
3472 o Minor features (control port):
3473 - Return a descriptive error message from the 'GETINFO status/fresh-
3474 relay-descs' command on the control port. Previously, we returned
3475 a generic error of "Error generating descriptor". Closes ticket
3476 32873. Patch by Neel Chauhan.
3478 o Minor features (developer tooling):
3479 - Refrain from listing all .a files that are generated by the Tor
3480 build in .gitignore. Add a single wildcard *.a entry that covers
3481 all of them for present and future. Closes ticket 33642.
3482 - Add a script ("git-install-tools.sh") to install git hooks and
3483 helper scripts. Closes ticket 33451.
3485 o Minor features (directory authority, shared random):
3486 - Refactor more authority-only parts of the shared-random scheduling
3487 code to reside in the dirauth module, and to be disabled when
3488 compiling with --disable-module-dirauth. Closes ticket 33436.
3490 o Minor features (directory):
3491 - Remember the number of bytes we have downloaded for each directory
3492 purpose while bootstrapping, and while fully bootstrapped. Log
3493 this information as part of the heartbeat message. Closes
3496 o Minor features (IPv6 support):
3497 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
3498 changes and tor_addr_is_null(). Closes ticket 33679. Patch
3500 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
3501 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
3502 Closes ticket 33901.
3504 o Minor features (logging):
3505 - When trying to find our own address, add debug-level logging to
3506 report the sources of candidate addresses. Closes ticket 32888.
3508 o Minor features (testing, architecture):
3509 - Our test scripts now double-check that subsystem initialization
3510 order is consistent with the inter-module dependencies established
3511 by our .may_include files. Implements ticket 31634.
3512 - Initialize all subsystems at the beginning of our unit test
3513 harness, to avoid crashes due to uninitialized subsystems. Follow-
3514 up from ticket 33316.
3516 o Minor features (v3 onion services):
3517 - Add v3 onion service status to the dumpstats() call which is
3518 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
3519 services. Closes ticket 24844. Patch by Neel Chauhan.
3521 o Minor features (windows):
3522 - Add support for console control signals like Ctrl+C in Windows.
3523 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
3525 o Minor bugfix (onion service v3):
3526 - Prevent an assert() that would occur when cleaning the client
3527 descriptor cache, and attempting to close circuits for a non-
3528 decrypted descriptor (lacking client authorization). Fixes bug
3529 33458; bugfix on 0.4.2.1-alpha.
3531 o Minor bugfix (refactoring):
3532 - Lift circuit_build_times_disabled() out of the
3533 circuit_expire_building() loop, to save CPU time when there are
3534 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
3536 o Minor bugfixes (client performance):
3537 - Resume use of preemptively-built circuits when UseEntryGuards is set
3538 to 0. We accidentally disabled this feature with that config
3539 setting, leading to slower load times. Fixes bug 34303; bugfix
3542 o Minor bugfixes (directory authorities):
3543 - Directory authorities now reject votes that arrive too late. In
3544 particular, once an authority has started fetching missing votes,
3545 it no longer accepts new votes posted by other authorities. This
3546 change helps prevent a consensus split, where only some authorities
3547 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
3549 o Minor bugfixes (git scripts):
3550 - Stop executing the checked-out pre-commit hook from the pre-push
3551 hook. Instead, execute the copy in the user's git directory. Fixes
3552 bug 33284; bugfix on 0.4.1.1-alpha.
3554 o Minor bugfixes (initialization):
3555 - Initialize the subsystems in our code in an order more closely
3556 corresponding to their dependencies, so that every system is
3557 initialized before the ones that (theoretically) depend on it.
3558 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
3560 o Minor bugfixes (IPv4, relay):
3561 - Check for invalid zero IPv4 addresses and ports when sending and
3562 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3564 o Minor bugfixes (IPv6, relay):
3565 - Consider IPv6 addresses when checking if a connection is
3566 canonical. In 17604, relays assumed that a remote relay could
3567 consider an IPv6 connection canonical, but did not set the
3568 canonical flag on their side of the connection. Fixes bug 33899;
3569 bugfix on 0.3.1.1-alpha.
3570 - Log IPv6 addresses on connections where this relay is the
3571 responder. Previously, responding relays would replace the remote
3572 IPv6 address with the IPv4 address from the consensus. Fixes bug
3573 33899; bugfix on 0.3.1.1-alpha.
3575 o Minor bugfixes (linux seccomp sandbox nss):
3576 - Fix a startup crash when tor is compiled with --enable-nss and
3577 sandbox support is enabled. Fixes bug 34130; bugfix on
3578 0.3.5.1-alpha. Patch by Daniel Pinto.
3580 o Minor bugfixes (logging, testing):
3581 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
3582 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
3583 used to log a non-fatal warning, regardless of the debugging
3584 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
3586 o Minor bugfixes (logs):
3587 - Remove surprising empty line in the INFO-level log about circuit
3588 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
3590 o Minor bugfixes (mainloop):
3591 - Better guard against growing a buffer past its maximum 2GB in
3592 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
3594 o Minor bugfixes (manual page):
3595 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3596 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3598 o Minor bugfixes (onion service v3, client):
3599 - Remove a BUG() that was causing a stacktrace when a descriptor
3600 changed at an unexpected time. Fixes bug 28992; bugfix
3603 o Minor bugfixes (onion service, logging):
3604 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
3605 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
3607 o Minor bugfixes (portability):
3608 - Fix a portability error in the configure script, where we were
3609 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3611 o Minor bugfixes (protocol versions):
3612 - Sort tor's supported protocol version lists, as recommended by the
3613 tor directory specification. Fixes bug 33285; bugfix
3616 o Minor bugfixes (relays):
3617 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3618 descriptors, when the IPv6 port was configured as "auto". Fixes
3619 bug 32588; bugfix on 0.2.3.9-alpha.
3621 o Code simplification and refactoring:
3622 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
3623 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
3624 brackets, separating colon, and port number. Closes ticket 33956.
3625 Patch by Neel Chauhan.
3626 - Merge the orconn and ocirc events into the "core" subsystem, which
3627 manages or connections and origin circuits. Previously they were
3628 isolated in subsystems of their own.
3629 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
3630 inversion. Closes ticket 33633.
3631 - Move the circuit extend code to the relay module. Split the
3632 circuit extend function into smaller functions. Closes
3634 - Rewrite port_parse_config() to use the default port flags from
3635 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
3636 - Updated comments in 'scheduler.c' to reflect old code changes, and
3637 simplified the scheduler channel state change code. Closes
3641 - Document the limitations of using %include on config files with
3642 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
3643 0.3.1.1-alpha. Patch by Daniel Pinto.
3644 - Fix several doxygen warnings related to imbalanced groups. Closes
3648 - Remove the ClientAutoIPv6ORPort option. This option attempted to
3649 randomly choose between IPv4 and IPv6 for client connections, and
3650 wasn't a true implementation of Happy Eyeballs. Often, this option
3651 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
3652 Patch by Neel Chauhan.
3653 - Stop shipping contrib/dist/rc.subr file, as it is not being used
3654 on FreeBSD anymore. Closes issue 31576.
3657 - Add a basic IPv6 test to "make test-network". This test only runs
3658 when the local machine has an IPv6 stack. Closes ticket 33300.
3659 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
3660 These jobs run the IPv4-only and dual-stack chutney flavours from
3661 test-network-all. Closes ticket 33280.
3662 - Remove a redundant distcheck job. Closes ticket 33194.
3663 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
3664 chutney job. This job runs on macOS, so it's a bit slow. Closes
3666 - Sort the Travis jobs in order of speed. Putting the slowest jobs
3667 first takes full advantage of Travis job concurrency. Closes
3669 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3670 previously configured to fast_finish (which requires
3671 allow_failure), to speed up the build. Closes ticket 33195.
3672 - Test v3 onion services to tor's mixed IPv4 chutney network. And
3673 add a mixed IPv6 chutney network. These networks are used in the
3674 test-network-all, test-network-ipv4, and test-network-ipv6 make
3675 targets. Closes ticket 33334.
3676 - Use the "bridges+hs-v23" chutney network flavour in "make test-
3677 network". This test requires a recent version of chutney (mid-
3678 February 2020). Closes ticket 28208.
3679 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3680 tool to produce detailed diagnostic output. Closes ticket 32792.
3682 o Code simplification and refactoring (onion service):
3683 - Refactor configuration parsing to use the new config subsystem
3684 code. Closes ticket 33014.
3686 o Code simplification and refactoring (relay address):
3687 - Move a series of functions related to address resolving into their
3688 own files. Closes ticket 33789.
3690 o Documentation (manual page):
3691 - Add cross reference links and a table of contents to the HTML tor
3692 manual page. Closes ticket 33369. Work by Swati Thacker as part of
3693 Google Season of Docs.
3694 - Alphabetize the Denial of Service Mitigation Options, Directory
3695 Authority Server Options, Hidden Service Options, and Testing
3696 Network Options sections of the tor(1) manual page. Closes ticket
3697 33275. Work by Swati Thacker as part of Google Season of Docs.
3698 - Refrain from mentioning nicknames in manpage section for MyFamily
3699 torrc option. Resolves issue 33417.
3700 - Updated the options set by TestingTorNetwork in the manual page.
3701 Closes ticket 33778.
3704 Changes in version 0.4.3.5 - 2020-05-15
3705 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
3706 series adds support for building without relay code enabled, and
3707 implements functionality needed for OnionBalance with v3 onion
3708 services. It includes significant refactoring of our configuration and
3709 controller functionality, and fixes numerous smaller bugs and
3712 Per our support policy, we support each stable release series for nine
3713 months after its first stable release, or three months after the first
3714 stable release of the next series: whichever is longer. This means
3715 that 0.4.3.x will be supported until around February 2021--later, if
3716 0.4.4.x is later than anticipated.
3718 Note also that support for 0.4.1.x is about to end on May 20 of this
3719 year; 0.4.2.x will be supported until September 15. We still plan to
3720 continue supporting 0.3.5.x, our long-term stable series, until
3723 Below are the changes since 0.4.3.4-rc. For a complete list of changes
3724 since 0.4.2.6, see the ReleaseNotes file.
3726 o Minor bugfixes (compiler compatibility):
3727 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3728 style "/* falls through */" comments. Both Clang and GCC allow
3729 __attribute__((fallthrough)) instead, so that's what we're using
3730 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3731 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3734 o Minor bugfixes (logging):
3735 - Stop truncating IPv6 addresses and ports in channel and connection
3736 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
3737 - Fix a logic error in a log message about whether an address was
3738 invalid. Previously, the code would never report that onion
3739 addresses were onion addresses. Fixes bug 34131; bugfix
3743 Changes in version 0.4.3.4-rc - 2020-04-13
3744 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
3745 several bugs from earlier versions, including one affecting DoS
3746 defenses on bridges using pluggable transports.
3748 o Major bugfixes (DoS defenses, bridges, pluggable transport):
3749 - Fix a bug that was preventing DoS defenses from running on bridges
3750 with a pluggable transport. Previously, the DoS subsystem was not
3751 given the transport name of the client connection, thus failed to
3752 find the GeoIP cache entry for that client address. Fixes bug
3753 33491; bugfix on 0.3.3.2-alpha.
3755 o Minor feature (sendme, flow control):
3756 - Default to sending SENDME version 1 cells. (Clients are already
3757 sending these, because of a consensus parameter telling them to do
3758 so: this change only affects what clients would do if the
3759 consensus didn't contain a recommendation.) Closes ticket 33623.
3761 o Minor features (testing):
3762 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3763 variable to specify a list of space-separated test cases that
3764 should not be executed. We will use this to disable certain tests
3765 that are failing on Appveyor because of mismatched OpenSSL
3766 libraries. Part of ticket 33643.
3768 o Minor bugfixes (--disable-module-relay):
3769 - Fix an assertion failure when Tor is built without the relay
3770 module, and then invoked with the "User" option. Fixes bug 33668;
3771 bugfix on 0.4.3.1-alpha.
3773 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
3774 - Set some output arguments in the relay and dirauth module stubs,
3775 to guard against future stub argument handling bugs like 33668.
3776 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
3778 o Minor bugfixes (build system):
3779 - Correctly output the enabled module in the configure summary.
3780 Before that, the list shown was just plain wrong. Fixes bug 33646;
3781 bugfix on 0.4.3.2-alpha.
3783 o Minor bugfixes (client, IPv6):
3784 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
3785 Instead, prefer IPv6 connections by default, but allow users to
3786 change their configs using the "NoPreferIPv6" port flag. Fixes bug
3787 33608; bugfix on 0.4.3.1-alpha.
3788 - Revert PreferIPv6 set by default on the SocksPort because it broke
3789 the torsocks use case. Tor doesn't have a way for an application
3790 to request the hostname to be resolved for a specific IP version,
3791 but torsocks requires that. Up until now, IPv4 was used by default
3792 so torsocks is expecting that, and can't handle a possible IPv6
3793 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
3795 o Minor bugfixes (key portability):
3796 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3797 if we are not running on Windows. Previously, non-Windows hosts
3798 would reject these line-endings in certain positions, making
3799 certain key files hard to move from one host to another. Fixes bug
3800 33032; bugfix on 0.3.5.1-alpha.
3802 o Minor bugfixes (logging):
3803 - Flush stderr, stdout, and file logs during shutdown, if supported
3804 by the OS. This change helps make sure that any final logs are
3805 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3806 - Stop closing stderr and stdout during shutdown. Closing these file
3807 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
3810 o Minor bugfixes (onion services v3):
3811 - Relax severity of a log message that can appear naturally when
3812 decoding onion service descriptors as a relay. Also add some
3813 diagnostics to debug any future bugs in that area. Fixes bug
3814 31669; bugfix on 0.3.0.1-alpha.
3815 - Block a client-side assertion by disallowing the registration of
3816 an x25519 client auth key that's all zeroes. Fixes bug 33545;
3817 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
3819 o Code simplification and refactoring:
3820 - Disable our coding standards best practices tracker in our git
3821 hooks. (0.4.3 branches only.) Closes ticket 33678.
3824 - Avoid conflicts between the fake sockets in tor's unit tests, and
3825 real file descriptors. Resolves issues running unit tests with
3826 GitHub Actions, where the process that embeds or launches the
3827 tests has already opened a large number of file descriptors. Fixes
3828 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
3832 - In our Appveyor Windows CI, copy required DLLs to test and app
3833 directories, before running tor's tests. This ensures that tor.exe
3834 and test*.exe use the correct version of each DLL. This fix is not
3835 required, but we hope it will avoid DLL search issues in future.
3836 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3837 - On Appveyor, skip the crypto/openssl_version test, which is
3838 failing because of a mismatched library installation. Fix
3842 Changes in version 0.4.3.3-alpha - 2020-03-18
3843 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
3844 TROVE-2020-002, a major denial-of-service vulnerability that affected
3845 all released Tor instances since 0.2.1.5-alpha. Using this
3846 vulnerability, an attacker could cause Tor instances to consume a huge
3847 amount of CPU, disrupting their operations for several seconds or
3848 minutes. This attack could be launched by anybody against a relay, or
3849 by a directory cache against any client that had connected to it. The
3850 attacker could launch this attack as much as they wanted, thereby
3851 disrupting service or creating patterns that could aid in traffic
3852 analysis. This issue was found by OSS-Fuzz, and is also tracked
3855 We do not have reason to believe that this attack is currently being
3856 exploited in the wild, but nonetheless we advise everyone to upgrade
3857 as soon as packages are available.
3859 o Major bugfixes (security, denial-of-service):
3860 - Fix a denial-of-service bug that could be used by anyone to
3861 consume a bunch of CPU on any Tor relay or authority, or by
3862 directories to consume a bunch of CPU on clients or hidden
3863 services. Because of the potential for CPU consumption to
3864 introduce observable timing patterns, we are treating this as a
3865 high-severity security issue. Fixes bug 33119; bugfix on
3866 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3867 as TROVE-2020-002 and CVE-2020-10592.
3869 o Major bugfixes (circuit padding, memory leak):
3870 - Avoid a remotely triggered memory leak in the case that a circuit
3871 padding machine is somehow negotiated twice on the same circuit.
3872 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3873 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3875 o Major bugfixes (directory authority):
3876 - Directory authorities will now send a 503 (not enough bandwidth)
3877 code to clients when under bandwidth pressure. Known relays and
3878 other authorities will always be answered regardless of the
3879 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3881 o Minor features (diagnostic):
3882 - Improve assertions and add some memory-poisoning code to try to
3883 track down possible causes of a rare crash (32564) in the EWMA
3884 code. Closes ticket 33290.
3886 o Minor features (directory authorities):
3887 - Directory authorities now reject descriptors from relays running
3888 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
3889 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
3891 o Minor features (usability):
3892 - Include more information when failing to parse a configuration
3893 value. This should make it easier to tell what's going wrong when
3894 a configuration file doesn't parse. Closes ticket 33460.
3896 o Minor bugfix (relay, configuration):
3897 - Warn if the ContactInfo field is not set, and tell the relay
3898 operator that not having a ContactInfo field set might cause their
3899 relay to get rejected in the future. Fixes bug 33361; bugfix
3902 o Minor bugfixes (coding best practices checks):
3903 - Allow the "practracker" script to read unicode files when using
3904 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
3905 but didn't change the codec for opening files. Fixes bug 33374;
3906 bugfix on 0.4.3.1-alpha.
3908 o Minor bugfixes (continuous integration):
3909 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
3912 o Minor bugfixes (onion service v3, client):
3913 - Remove a BUG() warning that would cause a stack trace if an onion
3914 service descriptor was freed while we were waiting for a
3915 rendezvous circuit to complete. Fixes bug 28992; bugfix
3918 o Minor bugfixes (onion services v3):
3919 - Fix an assertion failure that could result from a corrupted
3920 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3921 bugfix on 0.3.3.1-alpha. This issue is also tracked
3924 o Documentation (manpage):
3925 - Alphabetize the Server and Directory server sections of the tor
3926 manpage. Also split Statistics options into their own section of
3927 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
3928 Google Season of Docs.
3929 - Document the __OwningControllerProcess torrc option and specify
3930 its polling interval. Resolves issue 32971.
3932 o Testing (Travis CI):
3933 - Remove a redundant distcheck job. Closes ticket 33194.
3934 - Sort the Travis jobs in order of speed: putting the slowest jobs
3935 first takes full advantage of Travis job concurrency. Closes
3937 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3938 previously configured to fast_finish (which requires
3939 allow_failure), to speed up the build. Closes ticket 33195.
3940 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3941 tool to produce detailed diagnostic output. Closes ticket 32792.
3944 Changes in version 0.4.2.7 - 2020-03-18
3945 This is the third stable release in the 0.4.2.x series. It backports
3946 numerous fixes from later releases, including a fix for TROVE-2020-
3947 002, a major denial-of-service vulnerability that affected all
3948 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
3949 an attacker could cause Tor instances to consume a huge amount of CPU,
3950 disrupting their operations for several seconds or minutes. This
3951 attack could be launched by anybody against a relay, or by a directory
3952 cache against any client that had connected to it. The attacker could
3953 launch this attack as much as they wanted, thereby disrupting service
3954 or creating patterns that could aid in traffic analysis. This issue
3955 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
3957 We do not have reason to believe that this attack is currently being
3958 exploited in the wild, but nonetheless we advise everyone to upgrade
3959 as soon as packages are available.
3961 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3962 - Fix a denial-of-service bug that could be used by anyone to
3963 consume a bunch of CPU on any Tor relay or authority, or by
3964 directories to consume a bunch of CPU on clients or hidden
3965 services. Because of the potential for CPU consumption to
3966 introduce observable timing patterns, we are treating this as a
3967 high-severity security issue. Fixes bug 33119; bugfix on
3968 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3969 as TROVE-2020-002 and CVE-2020-10592.
3971 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3972 - Avoid a remotely triggered memory leak in the case that a circuit
3973 padding machine is somehow negotiated twice on the same circuit.
3974 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3975 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3977 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
3978 - Directory authorities will now send a 503 (not enough bandwidth)
3979 code to clients when under bandwidth pressure. Known relays and
3980 other authorities will always be answered regardless of the
3981 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3983 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3984 - Stop allowing failures on the Travis CI stem tests job. It looks
3985 like all the stem hangs we were seeing before are now fixed.
3986 Closes ticket 33075.
3988 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3989 - Lowercase the configured value of BridgeDistribution before adding
3990 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3992 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3993 - If we encounter a bug when flushing a buffer to a TLS connection,
3994 only log the bug once per invocation of the Tor process.
3995 Previously we would log with every occurrence, which could cause
3996 us to run out of disk space. Fixes bug 33093; bugfix
3999 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4000 - Fix an assertion failure that could result from a corrupted
4001 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4002 bugfix on 0.3.3.1-alpha. This issue is also tracked
4005 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4006 - Fix a syntax warning given by newer versions of Rust that was
4007 creating problems for our continuous integration. Fixes bug 33212;
4008 bugfix on 0.3.5.1-alpha.
4010 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4011 - Remove a redundant distcheck job. Closes ticket 33194.
4012 - Sort the Travis jobs in order of speed: putting the slowest jobs
4013 first takes full advantage of Travis job concurrency. Closes
4015 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4016 previously configured to fast_finish (which requires
4017 allow_failure), to speed up the build. Closes ticket 33195.
4018 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4019 tool to produce detailed diagnostic output. Closes ticket 32792.
4022 Changes in version 0.4.1.9 - 2020-03-18
4023 Tor 0.4.1.9 backports important fixes from later Tor releases,
4024 including a fix for TROVE-2020-002, a major denial-of-service
4025 vulnerability that affected all released Tor instances since
4026 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
4027 instances to consume a huge amount of CPU, disrupting their operations
4028 for several seconds or minutes. This attack could be launched by
4029 anybody against a relay, or by a directory cache against any client
4030 that had connected to it. The attacker could launch this attack as
4031 much as they wanted, thereby disrupting service or creating patterns
4032 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
4033 and is also tracked as CVE-2020-10592.
4035 We do not have reason to believe that this attack is currently being
4036 exploited in the wild, but nonetheless we advise everyone to upgrade
4037 as soon as packages are available.
4039 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4040 - Fix a denial-of-service bug that could be used by anyone to
4041 consume a bunch of CPU on any Tor relay or authority, or by
4042 directories to consume a bunch of CPU on clients or hidden
4043 services. Because of the potential for CPU consumption to
4044 introduce observable timing patterns, we are treating this as a
4045 high-severity security issue. Fixes bug 33119; bugfix on
4046 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4047 as TROVE-2020-002 and CVE-2020-10592.
4049 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
4050 - Avoid a remotely triggered memory leak in the case that a circuit
4051 padding machine is somehow negotiated twice on the same circuit.
4052 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
4053 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
4055 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4056 - Lowercase the configured value of BridgeDistribution before adding
4057 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4059 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4060 - If we encounter a bug when flushing a buffer to a TLS connection,
4061 only log the bug once per invocation of the Tor process.
4062 Previously we would log with every occurrence, which could cause
4063 us to run out of disk space. Fixes bug 33093; bugfix
4066 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4067 - Fix an assertion failure that could result from a corrupted
4068 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4069 bugfix on 0.3.3.1-alpha. This issue is also tracked
4072 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4073 - Fix a syntax warning given by newer versions of Rust that was
4074 creating problems for our continuous integration. Fixes bug 33212;
4075 bugfix on 0.3.5.1-alpha.
4077 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4078 - Remove a redundant distcheck job. Closes ticket 33194.
4079 - Sort the Travis jobs in order of speed: putting the slowest jobs
4080 first takes full advantage of Travis job concurrency. Closes
4082 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4083 previously configured to fast_finish (which requires
4084 allow_failure), to speed up the build. Closes ticket 33195.
4085 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4086 tool to produce detailed diagnostic output. Closes ticket 32792.
4089 Changes in version 0.3.5.10 - 2020-03-18
4090 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
4091 fix for TROVE-2020-002, a major denial-of-service vulnerability that
4092 affected all released Tor instances since 0.2.1.5-alpha. Using this
4093 vulnerability, an attacker could cause Tor instances to consume a huge
4094 amount of CPU, disrupting their operations for several seconds or
4095 minutes. This attack could be launched by anybody against a relay, or
4096 by a directory cache against any client that had connected to it. The
4097 attacker could launch this attack as much as they wanted, thereby
4098 disrupting service or creating patterns that could aid in traffic
4099 analysis. This issue was found by OSS-Fuzz, and is also tracked
4102 We do not have reason to believe that this attack is currently being
4103 exploited in the wild, but nonetheless we advise everyone to upgrade
4104 as soon as packages are available.
4106 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
4107 - Fix a denial-of-service bug that could be used by anyone to
4108 consume a bunch of CPU on any Tor relay or authority, or by
4109 directories to consume a bunch of CPU on clients or hidden
4110 services. Because of the potential for CPU consumption to
4111 introduce observable timing patterns, we are treating this as a
4112 high-severity security issue. Fixes bug 33119; bugfix on
4113 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
4114 as TROVE-2020-002 and CVE-2020-10592.
4116 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4117 - Correct how we use libseccomp. Particularly, stop assuming that
4118 rules are applied in a particular order or that more rules are
4119 processed after the first match. Neither is the case! In
4120 libseccomp <2.4.0 this lead to some rules having no effect.
4121 libseccomp 2.4.0 changed how rules are generated, leading to a
4122 different ordering, which in turn led to a fatal crash during
4123 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4126 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
4127 - Stop allowing failures on the Travis CI stem tests job. It looks
4128 like all the stem hangs we were seeing before are now fixed.
4129 Closes ticket 33075.
4131 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
4132 - Lowercase the configured value of BridgeDistribution before adding
4133 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4135 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
4136 - When running Tor with an option like --verify-config or
4137 --dump-config that does not start the event loop, avoid crashing
4138 if we try to exit early because of an error. Fixes bug 32407;
4139 bugfix on 0.3.3.1-alpha.
4141 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
4142 - If we encounter a bug when flushing a buffer to a TLS connection,
4143 only log the bug once per invocation of the Tor process.
4144 Previously we would log with every occurrence, which could cause
4145 us to run out of disk space. Fixes bug 33093; bugfix
4148 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
4149 - Fix an assertion failure that could result from a corrupted
4150 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
4151 bugfix on 0.3.3.1-alpha. This issue is also tracked
4154 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
4155 - Fix a syntax warning given by newer versions of Rust that was
4156 creating problems for our continuous integration. Fixes bug 33212;
4157 bugfix on 0.3.5.1-alpha.
4159 o Testing (backport from 0.4.3.1-alpha):
4160 - Re-enable the Travis CI macOS Chutney build, but don't let it
4161 prevent the Travis job from finishing. (The Travis macOS jobs are
4162 slow, so we don't want to have it delay the whole CI process.)
4163 Closes ticket 32629.
4164 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4165 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4166 fix the sandbox errors in 32722. Closes ticket 32240.
4168 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4169 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4171 o Testing (Travis CI, backport from 0.4.3.3-alpha):
4172 - Remove a redundant distcheck job. Closes ticket 33194.
4173 - Sort the Travis jobs in order of speed: putting the slowest jobs
4174 first takes full advantage of Travis job concurrency. Closes
4176 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
4177 previously configured to fast_finish (which requires
4178 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
4179 tool to produce detailed diagnostic output. Closes ticket 32792.
4182 Changes in version 0.4.3.2-alpha - 2020-02-10
4183 This is the second stable alpha release in the Tor 0.4.3.x series. It
4184 fixes several bugs present in the previous alpha release. Anybody
4185 running the previous alpha should upgrade, and look for bugs in this
4188 o Major bugfixes (onion service client, authorization):
4189 - On a NEWNYM signal, purge entries from the ephemeral client
4190 authorization cache. The permanent ones are kept. Fixes bug 33139;
4191 bugfix on 0.4.3.1-alpha.
4193 o Minor features (best practices tracker):
4194 - Practracker now supports a --regen-overbroad option to regenerate
4195 the exceptions file, but only to revise exceptions to be _less_
4196 tolerant of best-practices violations. Closes ticket 32372.
4198 o Minor features (continuous integration):
4199 - Run Doxygen Makefile target on Travis, so we can learn about
4200 regressions in our internal documentation. Closes ticket 32455.
4201 - Stop allowing failures on the Travis CI stem tests job. It looks
4202 like all the stem hangs we were seeing before are now fixed.
4203 Closes ticket 33075.
4205 o Minor bugfixes (build system):
4206 - Revise configure options that were either missing or incorrect in
4207 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
4209 o Minor bugfixes (controller protocol):
4210 - Fix a memory leak introduced by refactoring of control reply
4211 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
4212 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
4214 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
4215 report them as SIGNAL events. Previously we would log a bug
4216 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
4218 o Minor bugfixes (logging):
4219 - If we encounter a bug when flushing a buffer to a TLS connection,
4220 only log the bug once per invocation of the Tor process.
4221 Previously we would log with every occurrence, which could cause
4222 us to run out of disk space. Fixes bug 33093; bugfix
4224 - When logging a bug, do not say "Future instances of this warning
4225 will be silenced" unless we are actually going to silence them.
4226 Previously we would say this whenever a BUG() check failed in the
4227 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
4229 o Minor bugfixes (onion service v2):
4230 - Move a series of v2 onion service warnings to protocol-warning
4231 level because they can all be triggered remotely by a malformed
4232 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
4234 o Minor bugfixes (onion service v3, client authorization):
4235 - When removing client authorization credentials using the control
4236 port, also remove the associated descriptor, so the onion service
4237 can no longer be contacted. Fixes bug 33148; bugfix
4240 o Minor bugfixes (pluggable transports):
4241 - When receiving a message on standard error from a pluggable
4242 transport, log it at info level, rather than as a warning. Fixes
4243 bug 33005; bugfix on 0.4.0.1-alpha.
4245 o Minor bugfixes (rust, build):
4246 - Fix a syntax warning given by newer versions of Rust that was
4247 creating problems for our continuous integration. Fixes bug 33212;
4248 bugfix on 0.3.5.1-alpha.
4250 o Minor bugfixes (TLS bug handling):
4251 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4252 error code rather than "WANTWRITE". This change might help avoid
4253 some CPU-wasting loops if the bug is ever triggered. Bug reported
4254 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4256 o Code simplification and refactoring (mainloop):
4257 - Simplify the ip_address_changed() function by removing redundant
4258 checks. Closes ticket 33091.
4260 o Documentation (manpage):
4261 - Split "Circuit Timeout" options and "Node Selection" options into
4262 their own sections of the tor manpage. Closes tickets 32928 and
4263 32929. Work by Swati Thacker as part of Google Season of Docs.
4266 Changes in version 0.4.2.6 - 2020-01-30
4267 This is the second stable release in the 0.4.2.x series. It backports
4268 several bugfixes from 0.4.3.1-alpha, including some that had affected
4269 the Linux seccomp2 sandbox or Windows services. If you're running with
4270 one of those configurations, you'll probably want to upgrade;
4271 otherwise, you should be fine with 0.4.2.5.
4273 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4274 - Correct how we use libseccomp. Particularly, stop assuming that
4275 rules are applied in a particular order or that more rules are
4276 processed after the first match. Neither is the case! In
4277 libseccomp <2.4.0 this led to some rules having no effect.
4278 libseccomp 2.4.0 changed how rules are generated, leading to a
4279 different ordering, which in turn led to a fatal crash during
4280 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4282 - Fix crash when reloading logging configuration while the
4283 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4284 0.4.1.7. Patch by Peter Gerber.
4286 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4287 - Use GCC/Clang's printf-checking feature to make sure that
4288 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4289 bugfix on 0.4.1.1-alpha.
4291 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4292 - Avoid a possible crash when trying to log a (fatal) assertion
4293 failure about mismatched magic numbers in configuration objects.
4294 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4296 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4297 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4298 test_practracker.sh script. Doing so caused a test failure. Fixes
4299 bug 32705; bugfix on 0.4.2.1-alpha.
4300 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4301 skipping practracker checks. Fixes bug 32705; bugfix
4304 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4305 - Initialize the publish/subscribe system when running as a windows
4306 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4308 o Testing (backport from 0.4.3.1-alpha):
4309 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4310 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4311 fix the sandbox errors in 32722. Closes ticket 32240.
4312 - Re-enable the Travis CI macOS Chutney build, but don't let it
4313 prevent the Travis job from finishing. (The Travis macOS jobs are
4314 slow, so we don't want to have it delay the whole CI process.)
4315 Closes ticket 32629.
4317 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4318 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4321 Changes in version 0.4.1.8 - 2020-01-30
4322 This release backports several bugfixes from later release series,
4323 including some that had affected the Linux seccomp2 sandbox or Windows
4324 services. If you're running with one of those configurations, you'll
4325 probably want to upgrade; otherwise, you should be fine with your
4326 current version of 0.4.1.x.
4328 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4329 - Correct how we use libseccomp. Particularly, stop assuming that
4330 rules are applied in a particular order or that more rules are
4331 processed after the first match. Neither is the case! In
4332 libseccomp <2.4.0 this led to some rules having no effect.
4333 libseccomp 2.4.0 changed how rules are generated, leading to a
4334 different ordering, which in turn led to a fatal crash during
4335 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4337 - Fix crash when reloading logging configuration while the
4338 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4339 0.4.1.7. Patch by Peter Gerber.
4341 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4342 - When running Tor with an option like --verify-config or
4343 --dump-config that does not start the event loop, avoid crashing
4344 if we try to exit early because of an error. Fixes bug 32407;
4345 bugfix on 0.3.3.1-alpha.
4347 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4348 - Initialize the publish/subscribe system when running as a windows
4349 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4351 o Testing (backport from 0.4.3.1-alpha):
4352 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4353 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4354 fix the sandbox errors in 32722. Closes ticket 32240.
4355 - Re-enable the Travis CI macOS Chutney build, but don't let it
4356 prevent the Travis job from finishing. (The Travis macOS jobs are
4357 slow, so we don't want to have it delay the whole CI process.)
4358 Closes ticket 32629.
4360 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4361 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4364 Changes in version 0.4.3.1-alpha - 2020-01-22
4365 This is the first alpha release in the 0.4.3.x series. It includes
4366 improved support for application integration of onion services, support
4367 for building in a client-only mode, and newly improved internal
4368 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4369 also has numerous other small bugfixes and features, as well as
4370 improvements to our code's internal organization that should help us
4371 write better code in the future.
4373 o New system requirements:
4374 - When building Tor, you now need to have Python 3 in order to run
4375 the integration tests. (Python 2 is officially unsupported
4376 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4378 o Major features (build system):
4379 - The relay code can now be disabled using the --disable-module-relay
4380 configure option. When this option is set, we also disable the
4381 dirauth module. Closes ticket 32123.
4382 - When Tor is compiled --disable-module-relay, we also omit the code
4383 used to act as a directory cache. Closes ticket 32487.
4385 o Major features (directory authority, ed25519):
4386 - Add support for banning a relay's ed25519 keys in the approved-
4387 routers file. This will help us migrate away from RSA keys in the
4388 future. Previously, only RSA keys could be banned in approved-
4389 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4391 o Major features (onion service, controller):
4392 - New control port commands to manage client-side onion service
4393 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4394 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4395 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4397 o Major features (onion service, SOCKS5):
4398 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4399 detailed error codes in information for applications that support
4400 them. Closes ticket 30382; implements proposal 304.
4402 o Major features (proxy):
4403 - In addition to its current supported proxy types (HTTP CONNECT,
4404 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4405 HAProxy server. A new torrc option was added to specify the
4406 address/port of the server: TCPProxy <protocol> <host>:<port>.
4407 Currently the only supported protocol for the option is haproxy.
4408 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4410 o Major bugfixes (linux seccomp sandbox):
4411 - Correct how we use libseccomp. Particularly, stop assuming that
4412 rules are applied in a particular order or that more rules are
4413 processed after the first match. Neither is the case! In
4414 libseccomp <2.4.0 this led to some rules having no effect.
4415 libseccomp 2.4.0 changed how rules are generated, leading to a
4416 different ordering, which in turn led to a fatal crash during
4417 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4419 - Fix crash when reloading logging configuration while the
4420 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4421 0.4.1.7. Patch by Peter Gerber.
4423 o Major bugfixes (networking):
4424 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4425 and accept strings as well as binary addresses. Fixes bug 32315;
4426 bugfix on 0.3.5.1-alpha.
4428 o Major bugfixes (onion service):
4429 - Report HS circuit failure back into the HS subsystem so we take
4430 appropriate action with regards to the client introduction point
4431 failure cache. This improves reachability of onion services, since
4432 now clients notice failing introduction circuits properly. Fixes
4433 bug 32020; bugfix on 0.3.2.1-alpha.
4435 o Minor feature (configure, build system):
4436 - Output a list of enabled/disabled features at the end of the
4437 configure process in a pleasing way. Closes ticket 31373.
4439 o Minor feature (heartbeat, onion service):
4440 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4441 message. Closes ticket 31371.
4443 o Minor features (configuration validation):
4444 - Configuration validation can now be done by per-module callbacks,
4445 rather than a global validation function. This will let us reduce
4446 the size of config.c and some of its more cumbersome functions.
4447 Closes ticket 31241.
4449 o Minor features (configuration):
4450 - If a configured hardware crypto accelerator in AccelName is
4451 prefixed with "!", Tor now exits when it cannot be found. Closes
4453 - We now use flag-driven logic to warn about obsolete configuration
4454 fields, so that we can include their names. In 0.4.2, we used a
4455 special type, which prevented us from generating good warnings.
4456 Implements ticket 32404.
4458 o Minor features (controller):
4459 - Add stream isolation data to STREAM event. Closes ticket 19859.
4460 - Implement a new GETINFO command to fetch microdescriptor
4461 consensus. Closes ticket 31684.
4463 o Minor features (debugging, directory system):
4464 - Don't crash when we find a non-guard with a guard-fraction value
4465 set. Instead, log a bug warning, in an attempt to figure out how
4466 this happened. Diagnostic for ticket 32868.
4468 o Minor features (defense in depth):
4469 - Add additional checks around tor_vasprintf() usage, in case the
4470 function returns an error. Patch by Tobias Stoeckmann. Fixes
4473 o Minor features (developer tooling):
4474 - Remove the 0.2.9.x series branches from git scripts (git-merge-
4475 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
4476 Closes ticket 32772.
4478 o Minor features (developer tools):
4479 - Add a check_cocci_parse.sh script that checks that new code is
4480 parseable by Coccinelle. Add an exceptions file for unparseable
4481 files, and run the script from travis CI. Closes ticket 31919.
4482 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
4483 target. Closes ticket 31919.
4484 - Add a rename_c_identifiers.py tool to rename a bunch of C
4485 identifiers at once, and generate a well-formed commit message
4486 describing the change. This should help with refactoring. Closes
4488 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
4489 semantic patching tool with the correct flags. These flags are
4490 fairly easy to forget, and these scripts should help us use
4491 Coccinelle more effectively in the future. Closes ticket 31705.
4493 o Minor features (Doxygen):
4494 - Update Doxygen configuration file to a more recent template (from
4495 1.8.15). Closes ticket 32110.
4496 - "make doxygen" now works with out-of-tree builds. Closes
4498 - Make sure that doxygen outputs documentation for all of our C
4499 files. Previously, some were missing @file declarations, causing
4500 them to be ignored. Closes ticket 32307.
4501 - Our "make doxygen" target now respects --enable-fatal-warnings by
4502 default, and does not warn about items that are missing
4503 documentation. To warn about missing documentation, run configure
4504 with the "--enable-missing-doc-warnings" flag: doing so suspends
4505 fatal warnings for doxygen. Closes ticket 32385.
4507 o Minor features (git scripts):
4508 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
4509 customisation. Closes ticket 32347.
4510 - Add git-setup-dirs.sh, which sets up an upstream git repository
4511 and worktrees for tor maintainers. Closes ticket 29603.
4512 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
4513 remote. Closes ticket 32347.
4514 - Call the check_cocci_parse.sh script from the git commit and push
4515 hooks. Closes ticket 31919.
4516 - Make git-push-all.sh skip unchanged branches when pushing to
4517 upstream. The script already skipped unchanged test branches.
4518 Closes ticket 32216.
4519 - Make git-setup-dirs.sh create a master symlink in the worktree
4520 directory. Closes ticket 32347.
4521 - Skip unmodified source files when doing some existing git hook
4522 checks. Related to ticket 31919.
4524 o Minor features (IPv6, client):
4525 - Make Tor clients tell dual-stack exits that they prefer IPv6
4526 connections. This change is equivalent to setting the PreferIPv6
4527 flag on SOCKSPorts (and most other listener ports). Tor Browser
4528 has been setting this flag for some time, and we want to remove a
4529 client distinguisher at exits. Closes ticket 32637.
4531 o Minor features (portability, android):
4532 - When building for Android, disable some tests that depend on $HOME
4533 and/or pwdb, which Android doesn't have. Closes ticket 32825.
4534 Patch from Hans-Christoph Steiner.
4536 o Minor features (relay modularity):
4537 - Split the relay and server pluggable transport config code into
4538 separate files in the relay module. Disable this code when the
4539 relay module is disabled. Closes part of ticket 32213.
4540 - When the relay module is disabled, reject attempts to set the
4541 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
4542 ServerTransport* options, rather than ignoring the values of these
4543 options. Closes part of ticket 32213.
4545 o Minor features (relay):
4546 - When the relay module is disabled, change the default config so
4547 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
4549 o Minor features (release tools):
4550 - Port our ChangeLog formatting and sorting tools to Python 3.
4551 Closes ticket 32704.
4553 o Minor features (testing):
4554 - Detect some common failure cases for test_parseconf.sh in
4555 src/test/conf_failures. Closes ticket 32451.
4556 - Allow test_parseconf.sh to test expected log outputs for successful
4557 configs, as well as failed configs. Closes ticket 32451.
4558 - The test_parseconf.sh script now supports result variants for any
4559 combination of the optional libraries lzma, nss, and zstd. Closes
4562 o Minor features (tests, Android):
4563 - When running the unit tests on Android, create temporary files in
4564 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4565 patch from Hans-Christoph Steiner.
4567 o Minor bugfixes (bridges):
4568 - Lowercase the configured value of BridgeDistribution before adding
4569 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4571 o Minor bugfixes (build system):
4572 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4573 bugfix on 0.4.1.2-alpha.
4575 o Minor bugfixes (configuration handling):
4576 - Make control_event_conf_changed() take in a config_line_t instead
4577 of a smartlist of alternating key/value entries. Fixes bug 31531;
4578 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
4580 o Minor bugfixes (configuration):
4581 - Check for multiplication overflow when parsing memory units inside
4582 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
4583 - When dumping the configuration, stop adding a trailing space after
4584 the option name when there is no option value. This issue only
4585 affects options that accept an empty value or list. (Most options
4586 reject empty values, or delete the entire line from the dumped
4587 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
4588 - Avoid changing the user's value of HardwareAccel as stored by
4589 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
4590 bug 32382; bugfix on 0.2.2.1-alpha.
4591 - When creating a KeyDirectory with the same location as the
4592 DataDirectory (not recommended), respect the DataDirectory's
4593 group-readable setting if one has not been set for the
4594 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
4596 o Minor bugfixes (controller):
4597 - In routerstatus_has_changed(), check all the fields that are
4598 output over the control port. Fixes bug 20218; bugfix
4601 o Minor bugfixes (correctness checks):
4602 - Use GCC/Clang's printf-checking feature to make sure that
4603 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4604 bugfix on 0.4.1.1-alpha.
4606 o Minor bugfixes (developer tools):
4607 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
4608 31336; bugfix on 0.4.1.2-alpha.
4610 o Minor bugfixes (dirauth module):
4611 - Split the dirauth config code into a separate file in the dirauth
4612 module. Disable this code when the dirauth module is disabled.
4613 Closes ticket 32213.
4614 - When the dirauth module is disabled, reject attempts to set the
4615 AuthoritativeDir option, rather than ignoring the value of the
4616 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
4618 o Minor bugfixes (embedded Tor):
4619 - When starting Tor any time after the first time in a process,
4620 register the thread in which it is running as the main thread.
4621 Previously, we only did this on Windows, which could lead to bugs
4622 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
4625 o Minor bugfixes (git scripts):
4626 - Avoid sleeping before the last push in git-push-all.sh. Closes
4628 - Forward all unrecognised arguments in git-push-all.sh to git push.
4629 Closes ticket 32216.
4631 o Minor bugfixes (hidden service v3):
4632 - Do not rely on a "circuit established" flag for intro circuits but
4633 instead always query the HS circuit map. This is to avoid sync
4634 issue with that flag and the map. Fixes bug 32094; bugfix
4637 o Minor bugfixes (logging, crash):
4638 - Avoid a possible crash when trying to log a (fatal) assertion
4639 failure about mismatched magic numbers in configuration objects.
4640 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4642 o Minor bugfixes (onion service v2):
4643 - When sending the INTRO cell for a v2 Onion Service, look at the
4644 failure cache alongside timeout values to check if the intro point
4645 is marked as failed. Previously, we only looked at the relay
4646 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
4649 o Minor bugfixes (onion services v3, client):
4650 - Properly handle the client rendezvous circuit timeout. Previously
4651 Tor would sometimes timeout a rendezvous circuit awaiting the
4652 introduction ACK, and find itself unable to re-establish all
4653 circuits because the rendezvous circuit timed out too early. Fixes
4654 bug 32021; bugfix on 0.3.2.1-alpha.
4656 o Minor bugfixes (onion services):
4657 - In cancel_descriptor_fetches(), use
4658 connection_list_by_type_purpose() instead of
4659 connection_list_by_type_state(). Fixes bug 32639; bugfix on
4660 0.3.2.1-alpha. Patch by Neel Chauhan.
4662 o Minor bugfixes (scripts):
4663 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
4664 bugfix on 0.4.0.1-alpha.
4666 o Minor bugfixes (test):
4667 - Use the same code to find the tor binary in all of our test
4668 scripts. This change makes sure we are always using the coverage
4669 binary when coverage is enabled. Fixes bug 32368; bugfix
4672 o Minor bugfixes (testing):
4673 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
4674 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
4675 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4676 test_practracker.sh script. Doing so caused a test failure. Fixes
4677 bug 32705; bugfix on 0.4.2.1-alpha.
4678 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4679 skipping practracker checks. Fixes bug 32705; bugfix
4682 o Minor bugfixes (tests):
4683 - Our option-validation tests no longer depend on specially
4684 configured non-default, non-passing sets of options. Previously,
4685 the tests had been written to assume that options would _not_ be
4686 set to their defaults, which led to needless complexity and
4687 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
4689 o Minor bugfixes (windows service):
4690 - Initialize the publish/subscribe system when running as a windows
4691 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4693 o Deprecated features:
4694 - Deprecate the ClientAutoIPv6ORPort option. This option was not
4695 true "Happy Eyeballs", and often failed on connections that
4696 weren't reliably dual-stack. Closes ticket 32942. Patch by
4700 - Provide a quickstart guide for a Circuit Padding Framework, and
4701 documentation for researchers to implement and study circuit
4702 padding machines. Closes ticket 28804.
4703 - Add documentation in 'HelpfulTools.md' to describe how to build a
4704 tag file. Closes ticket 32779.
4705 - Create a high-level description of the long-term software
4706 architecture goals. Closes ticket 32206.
4707 - Describe the --dump-config command in the manual page. Closes
4709 - Unite coding advice from this_not_that.md in torguts repo into our
4710 coding standards document. Resolves ticket 31853.
4713 - Our Doxygen configuration no longer generates LaTeX output. The
4714 reference manual produced by doing this was over 4000 pages long,
4715 and generally unusable. Closes ticket 32099.
4716 - The option "TestingEstimatedDescriptorPropagationTime" is now
4717 marked as obsolete. It has had no effect since 0.3.0.7, when
4718 clients stopped rejecting consensuses "from the future". Closes
4720 - We no longer support consensus methods before method 28; these
4721 methods were only used by authorities running versions of Tor that
4722 are now at end-of-life. In effect, this means that clients,
4723 relays, and authorities now assume that authorities will be
4724 running version 0.3.5.x or later. Closes ticket 32695.
4727 - Add more test cases for tor's UTF-8 validation function. Also,
4728 check the arguments passed to the function for consistency. Closes
4730 - Improve test coverage for relay and dirauth config code, focusing
4731 on option validation and normalization. Closes ticket 32213.
4732 - Improve the consistency of test_parseconf.sh output, and run all
4733 the tests, even if one fails. Closes ticket 32213.
4734 - Re-enable the Travis CI macOS Chutney build, but don't let it
4735 prevent the Travis job from finishing. (The Travis macOS jobs are
4736 slow, so we don't want to have it delay the whole CI process.)
4737 Closes ticket 32629.
4738 - Run the practracker unit tests in the pre-commit git hook. Closes
4740 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4741 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4742 fix the sandbox errors in 32722. Closes ticket 32240.
4744 o Code simplification and refactoring (channel):
4745 - Channel layer had a variable length cell handler that was not used
4746 and thus removed. Closes ticket 32892.
4748 o Code simplification and refactoring (configuration):
4749 - Immutability is now implemented as a flag on individual
4750 configuration options rather than as part of the option-transition
4751 checking code. Closes ticket 32344.
4752 - Instead of keeping a list of configuration options to check for
4753 relative paths, check all the options whose type is "FILENAME".
4754 Solves part of ticket 32339.
4755 - Our default log (which ordinarily sends NOTICE-level messages to
4756 standard output) is now handled in a more logical manner.
4757 Previously, we replaced the configured log options if they were
4758 empty. Now, we interpret an empty set of log options as meaning
4759 "use the default log". Closes ticket 31999.
4760 - Remove some unused arguments from the options_validate() function,
4761 to simplify our code and tests. Closes ticket 32187.
4762 - Simplify the options_validate() code so that it looks at the
4763 default options directly, rather than taking default options as an
4764 argument. This change lets us simplify its interface. Closes
4766 - Use our new configuration architecture to move most authority-
4767 related options to the directory authority module. Closes
4769 - When parsing the command line, handle options that determine our
4770 "quiet level" and our mode of operation (e.g., --dump-config and
4771 so on) all in one table. Closes ticket 32003.
4773 o Code simplification and refactoring (controller):
4774 - Create a new abstraction for formatting control protocol reply
4775 lines based on key-value pairs. Refactor some existing control
4776 protocol code to take advantage of this. Closes ticket 30984.
4777 - Create a helper function that can fetch network status or
4778 microdesc consensuses. Closes ticket 31684.
4780 o Code simplification and refactoring (dirauth modularization):
4781 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
4782 Closes ticket 32163.
4783 - Replace some confusing identifiers in process_descs.c. Closes
4785 - Simplify some relay and dirauth config code. Closes ticket 32213.
4787 o Code simplification and refactoring (misc):
4788 - Make all the structs we declare follow the same naming convention
4789 of ending with "_t". Closes ticket 32415.
4790 - Move and rename some configuration-related code for clarity.
4791 Closes ticket 32304.
4792 - Our include.am files are now broken up by subdirectory.
4793 Previously, src/core/include.am covered all of the subdirectories
4794 in "core", "feature", and "app". Closes ticket 32137.
4795 - Remove underused NS*() macros from test code: they make our tests
4796 more confusing, especially for code-formatting tools. Closes
4799 o Code simplification and refactoring (relay modularization):
4800 - Disable relay_periodic when the relay module is disabled. Closes
4802 - Disable relay_sys when the relay module is disabled. Closes
4805 o Code simplification and refactoring (tool support):
4806 - Add numerous missing dependencies to our include files, so that
4807 they can be included in different reasonable orders and still
4808 compile. Addresses part of ticket 32764.
4809 - Fix some parts of our code that were difficult for Coccinelle to
4810 parse. Related to ticket 31705.
4811 - Fix some small issues in our code that prevented automatic
4812 formatting tools from working. Addresses part of ticket 32764.
4814 o Documentation (manpage):
4815 - Alphabetize the Client Options section of the tor manpage. Closes
4817 - Alphabetize the General Options section of the tor manpage. Closes
4819 - In the tor(1) manpage, reword and improve formatting of the
4820 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
4821 32277. Based on work by Swati Thacker as part of Google Season
4823 - In the tor(1) manpage, reword and improve formatting of the FILES,
4824 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
4825 Swati Thacker as part of Google Season of Docs.
4827 o Testing (circuit, EWMA):
4828 - Add unit tests for circuitmux and EWMA subsystems. Closes
4831 o Testing (continuous integration):
4832 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4835 Changes in version 0.4.2.5 - 2019-12-09
4836 This is the first stable release in the 0.4.2.x series. This series
4837 improves reliability and stability, and includes several stability and
4838 correctness improvements for onion services. It also fixes many smaller
4839 bugs present in previous series.
4841 Per our support policy, we will support the 0.4.2.x series for nine
4842 months, or until three months after the release of a stable 0.4.3.x:
4843 whichever is longer. If you need longer-term support, please stick
4844 with 0.3.5.x, which will we plan to support until Feb 2022.
4846 Per our support policy, we will support the 0.4.2.x series for nine
4847 months, or until three months after the release of a stable 0.4.3.x:
4848 whichever is longer. If you need longer-term support, please stick
4849 with 0.3.5.x, which will we plan to support until Feb 2022.
4851 Below are the changes since 0.4.1.4-rc. For a complete list of changes
4852 since 0.4.1.5, see the ReleaseNotes file.
4854 o Minor features (geoip):
4855 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4856 Country database. Closes ticket 32685.
4859 - Require C99 standards-conforming code in Travis CI, but allow GNU
4860 gcc extensions. Also activates clang's -Wtypedef-redefinition
4861 warnings. Build some jobs with -std=gnu99, and some jobs without.
4862 Closes ticket 32500.
4865 Changes in version 0.4.1.7 - 2019-12-09
4866 This release backports several bugfixes to improve stability and
4867 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
4868 including all relays relying on AccountingMax, should upgrade.
4870 o Major features (directory authorities, backport from 0.4.2.2-alpha):
4871 - Directory authorities now reject relays running all currently
4872 deprecated release series. The currently supported release series
4873 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4875 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
4876 - Avoid a possible crash when restarting Tor in embedded mode and
4877 enabling a different set of publish/subscribe messages. Fixes bug
4878 31898; bugfix on 0.4.1.1-alpha.
4880 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4881 - Relays now respect their AccountingMax bandwidth again. When
4882 relays entered "soft" hibernation (which typically starts when
4883 we've hit 90% of our AccountingMax), we had stopped checking
4884 whether we should enter hard hibernation. Soft hibernation refuses
4885 new connections and new circuits, but the existing circuits can
4886 continue, meaning that relays could have exceeded their configured
4887 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4889 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4890 - Stop ignoring torrc options after an %include directive, when the
4891 included directory ends with a file that does not contain any
4892 config options (but does contain comments or whitespace). Fixes
4893 bug 31408; bugfix on 0.3.1.1-alpha.
4895 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4896 - Onion services now always use the exact number of intro points
4897 configured with the HiddenServiceNumIntroductionPoints option (or
4898 fewer if nodes are excluded). Before, a service could sometimes
4899 pick more intro points than configured. Fixes bug 31548; bugfix
4902 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4903 - When building on Appveyor and Travis, pass the "-k" flag to make,
4904 so that we are informed of all compilation failures, not just the
4905 first one or two. Closes ticket 31372.
4907 o Minor features (geoip, backport from 0.4.2.5):
4908 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4909 Country database. Closes ticket 32685.
4911 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4912 - Avoid spurious errors when Appveyor CI fails before the install step.
4913 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4915 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4916 - Fix a BUG() assertion that occurs within a very small race window
4917 between when a client intro circuit opens and when its descriptor
4918 gets cleaned up from the cache. The circuit is now closed early,
4919 which will trigger a re-fetch of the descriptor and continue the
4920 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4922 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4923 - Avoid trying to read data from closed connections, which can cause
4924 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4925 30344; bugfix on 0.1.1.1-alpha.
4927 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4928 - On abort, try harder to flush the output buffers of log messages.
4929 On some platforms (macOS), log messages could be discarded when
4930 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4931 - Report the tor version whenever an assertion fails. Previously, we
4932 only reported the Tor version on some crashes, and some non-fatal
4933 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4934 - When tor aborts due to an error, close log file descriptors before
4935 aborting. Closing the logs makes some OSes flush log file buffers,
4936 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4939 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4940 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4941 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4942 - Disable backtrace signal handlers when shutting down tor. Fixes
4943 bug 31614; bugfix on 0.2.5.2-alpha.
4944 - Rate-limit our the logging message about the obsolete .exit
4945 notation. Previously, there was no limit on this warning, which
4946 could potentially be triggered many times by a hostile website.
4947 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4949 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4950 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4951 cell on a connection using the obsolete v1 link protocol. Log a
4952 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4954 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4955 - Reset the periodic events' "enabled" flag when Tor is shut down
4956 cleanly. Previously, this flag was left on, which caused periodic
4957 events not to be re-enabled when Tor was relaunched in-process
4958 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4961 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
4962 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4963 31736; bugfix on 0.0.7.
4965 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
4966 - Remove overly strict assertions that triggered when a pluggable
4967 transport failed to launch. Fixes bug 31091; bugfix
4969 - Remove an assertion in the Unix process backend. This assertion
4970 would trigger when we failed to find the executable for a child
4971 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4973 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4974 - Avoid crashing when starting with a corrupt keys directory where
4975 the old ntor key and the new ntor key are identical. Fixes bug
4976 30916; bugfix on 0.2.4.8-alpha.
4978 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4979 - When testing port rebinding, don't busy-wait for tor to log.
4980 Instead, actually sleep for a short time before polling again.
4981 Also improve the formatting of control commands and log messages.
4982 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4984 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
4985 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4986 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4988 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4989 - Log bugs about the TLS read buffer's length only once, rather than
4990 filling the logs with similar warnings. Fixes bug 31939; bugfix
4993 o Documentation (backport from 0.4.2.2-alpha):
4994 - Explain why we can't destroy the backtrace buffer mutex. Explain
4995 why we don't need to destroy the log mutex. Closes ticket 31736.
4997 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4998 - Disable all but one Travis CI macOS build, to mitigate slow
4999 scheduling of Travis macOS jobs. Closes ticket 32177.
5000 - Run the chutney IPv6 networks as part of Travis CI. Closes
5002 - Simplify the Travis CI build matrix, and optimise for build time.
5003 Closes ticket 31859.
5004 - Use Windows Server 2019 instead of Windows Server 2016 in our
5005 Appveyor builds. Closes ticket 32086.
5007 o Testing (continuous integration, backport from 0.4.2.4-rc):
5008 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5009 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5010 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5011 until we can fix some Bionic permissions issues (see ticket
5012 32240). Related to ticket 31919.
5013 - Install the mingw OpenSSL package in Appveyor. This makes sure
5014 that the OpenSSL headers and libraries match in Tor's Appveyor
5015 builds. (This bug was triggered by an Appveyor image update.)
5016 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5018 o Testing (continuous integration, backport from 0.4.2.5):
5019 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5020 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5021 Build some jobs with -std=gnu99, and some jobs without.
5022 Closes ticket 32500.
5025 Changes in version 0.4.0.6 - 2019-12-09
5026 This is the second stable release in the 0.4.0.x series. This release
5027 backports several bugfixes to improve stability and correctness. Anyone
5028 experiencing build problems or crashes with 0.4.0.5, including all relays
5029 relying on AccountingMax, should upgrade.
5031 Note that, per our support policy, support for the 0.4.0.x series will end
5032 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
5033 latest stable release, or downgrade to 0.3.5.x, which will get long-term
5034 support until 1 Feb 2022.
5036 o Directory authority changes (backport from 0.4.1.5):
5037 - The directory authority "dizum" has a new IP address. Closes
5040 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5041 - Consider our directory information to have changed when our list
5042 of bridges changes. Previously, Tor would not re-compute the
5043 status of its directory information when bridges changed, and
5044 therefore would not realize that it was no longer able to build
5045 circuits. Fixes part of bug 29875.
5046 - Do not count previously configured working bridges towards our
5047 total of working bridges. Previously, when Tor's list of bridges
5048 changed, it would think that the old bridges were still usable,
5049 and delay fetching router descriptors for the new ones. Fixes part
5050 of bug 29875; bugfix on 0.3.0.1-alpha.
5052 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5053 - When considering upgrading circuits from "waiting for guard" to
5054 "open", always ignore circuits that are marked for close. Otherwise,
5055 we can end up in the situation where a subsystem is notified that
5056 a closing circuit has just opened, leading to undesirable
5057 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5059 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5060 - Properly clean up the introduction point map when circuits change
5061 purpose from onion service circuits to pathbias, measurement, or
5062 other circuit types. This should fix some service-side instances
5063 of introduction point failure. Fixes bug 29034; bugfix
5066 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5067 - Fix an unreachable bug in which an introduction point could try to
5068 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5069 to encode, leading the relay to assert(). We've consolidated the
5070 ABI values into Trunnel now. Fixes bug 30454; bugfix
5072 - Clients can now handle unknown status codes from INTRODUCE_ACK
5073 cells. (The NACK behavior will stay the same.) This will allow us
5074 to extend status codes in the future without breaking the normal
5075 client behavior. Fixes another part of bug 30454; bugfix
5078 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
5079 - Relays now respect their AccountingMax bandwidth again. When
5080 relays entered "soft" hibernation (which typically starts when
5081 we've hit 90% of our AccountingMax), we had stopped checking
5082 whether we should enter hard hibernation. Soft hibernation refuses
5083 new connections and new circuits, but the existing circuits can
5084 continue, meaning that relays could have exceeded their configured
5085 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5087 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5088 - Stop ignoring torrc options after an %include directive, when the
5089 included directory ends with a file that does not contain any
5090 config options (but does contain comments or whitespace). Fixes
5091 bug 31408; bugfix on 0.3.1.1-alpha.
5093 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5094 - Onion services now always use the exact number of intro points
5095 configured with the HiddenServiceNumIntroductionPoints option (or
5096 fewer if nodes are excluded). Before, a service could sometimes
5097 pick more intro points than configured. Fixes bug 31548; bugfix
5100 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5101 - Add a "--list-modules" command to print a list of which compile-
5102 time modules are enabled. Closes ticket 30452.
5104 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5105 - Remove sudo configuration lines from .travis.yml as they are no
5106 longer needed with current Travis build environment. Resolves
5109 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5110 - Our Travis configuration now uses Chutney to run some network
5111 integration tests automatically. Closes ticket 29280.
5113 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5114 - When building on Appveyor and Travis, pass the "-k" flag to make,
5115 so that we are informed of all compilation failures, not just the
5116 first one or two. Closes ticket 31372.
5118 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5119 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5120 in December 2018 (of which ~122 were still functional), with a
5121 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5122 in June 2019. Closes ticket 28795.
5124 o Minor features (geoip, backport from 0.4.2.5):
5125 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5126 Country database. Closes ticket 32685.
5128 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5129 - Change "make test-stem" so it only runs the stem tests that use
5130 tor. This change makes test-stem faster and more reliable. Closes
5133 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5134 - Avoid spurious errors when Appveyor CI fails before the install step.
5135 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5137 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5138 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5139 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5141 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5142 - Fix a logic error that prevented the SessionGroup sub-option from
5143 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5145 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
5146 - On relays, properly check that a padding machine is absent before
5147 logging a warning about it being absent. Fixes bug 30649; bugfix
5150 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5151 - Fix a BUG() assertion that occurs within a very small race window
5152 between when a client intro circuit opens and when its descriptor
5153 gets cleaned up from the cache. The circuit is now closed early,
5154 which will trigger a re-fetch of the descriptor and continue the
5155 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5157 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5158 - Don't believe clock skew results from NETINFO cells that appear to
5159 arrive before we sent the VERSIONS cells they are responding to.
5160 Previously, we would accept them up to 3 minutes "in the past".
5161 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5163 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5164 - Fix a compilation warning on Windows about casting a function
5165 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5168 o Minor bugfixes (compilation, backport from 0.4.1.5):
5169 - Avoid using labs() on time_t, which can cause compilation warnings
5170 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5172 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5173 - Suppress spurious float-conversion warnings from GCC when calling
5174 floating-point classifier functions on FreeBSD. Fixes part of bug
5175 31687; bugfix on 0.3.1.5-alpha.
5177 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5178 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5179 due to missing declarations of abort(), and prevent other such
5180 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5182 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5183 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5184 want authentication along with configured (but unused!)
5185 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5187 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5188 - Avoid trying to read data from closed connections, which can cause
5189 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5190 30344; bugfix on 0.1.1.1-alpha.
5192 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5193 - Allow the test-stem job to fail in Travis, because it sometimes
5194 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5195 - Skip test_rebind on macOS in Travis, because it is unreliable on
5196 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5197 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5198 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5200 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5201 - Avoid a set of possible code paths that could try to use freed
5202 memory in routerlist_free() while Tor was exiting. Fixes bug
5203 31003; bugfix on 0.1.2.2-alpha.
5205 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5206 - Stop crashing after parsing an unknown descriptor purpose
5207 annotation. We think this bug can only be triggered by modifying a
5208 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5210 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5211 - Move the "bandwidth-file-headers" line in directory authority
5212 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5215 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5216 - On abort, try harder to flush the output buffers of log messages.
5217 On some platforms (macOS), log messages could be discarded when
5218 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5219 - Report the tor version whenever an assertion fails. Previously, we
5220 only reported the Tor version on some crashes, and some non-fatal
5221 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5223 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5224 - When extracting an IPv6 address from a PF-based proxy, verify that
5225 we are actually configured to receive an IPv6 address, and log an
5226 internal error if not. Fixes part of bug 31687; bugfix
5229 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5230 - When tor is missing descriptors for some primary entry guards,
5231 make the log message less alarming. It's normal for descriptors to
5232 expire, as long as tor fetches new ones soon after. Fixes bug
5233 31657; bugfix on 0.3.3.1-alpha.
5235 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5236 - Do not log a warning when running with an OpenSSL version other
5237 than the one Tor was compiled with, if the two versions should be
5238 compatible. Previously, we would warn whenever the version was
5239 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5241 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5242 - Change log level of message "Hash of session info was not as
5243 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5246 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5247 - Rate-limit our the logging message about the obsolete .exit
5248 notation. Previously, there was no limit on this warning, which
5249 could potentially be triggered many times by a hostile website.
5250 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5252 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5253 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5254 cell on a connection using the obsolete v1 link protocol. Log a
5255 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5257 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5258 - Reset the periodic events' "enabled" flag when Tor is shut down
5259 cleanly. Previously, this flag was left on, which caused periodic
5260 events not to be re-enabled when Tor was relaunched in-process
5261 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5264 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5265 - Avoid a minor memory leak that could occur on relays when failing
5266 to create a "keys" directory. Fixes bug 30148; bugfix
5269 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5270 - Fix a trivial memory leak when parsing an invalid value
5271 from a download schedule in the configuration. Fixes bug
5272 30894; bugfix on 0.3.4.1-alpha.
5274 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5275 - Fix usage of minherit() on NetBSD and other platforms that define
5276 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5277 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5279 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5280 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5281 implemenation) when failing to load an onion service client
5282 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5284 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5285 - When purging the DNS cache because of an out-of-memory condition,
5286 try purging just the older entries at first. Previously, we would
5287 always purge the whole thing. Fixes bug 29617; bugfix
5290 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5291 - Avoid crashing in our tor_vasprintf() implementation on systems
5292 that define neither vasprintf() nor _vscprintf(). (This bug has
5293 been here long enough that we question whether people are running
5294 Tor on such systems, but we're applying the fix out of caution.)
5295 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5298 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5299 - Remove overly strict assertions that triggered when a pluggable
5300 transport failed to launch. Fixes bug 31091; bugfix
5302 - Remove an assertion in the Unix process backend. This assertion
5303 would trigger when we failed to find the executable for a child
5304 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5306 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5307 - Avoid crashing when starting with a corrupt keys directory where
5308 the old ntor key and the new ntor key are identical. Fixes bug
5309 30916; bugfix on 0.2.4.8-alpha.
5311 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5312 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5313 31463; bugfix on 0.3.5.4-alpha.
5315 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5316 - When testing port rebinding, don't busy-wait for tor to log.
5317 Instead, actually sleep for a short time before polling again.
5318 Also improve the formatting of control commands and log messages.
5319 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5321 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5322 - Log bugs about the TLS read buffer's length only once, rather than
5323 filling the logs with similar warnings. Fixes bug 31939; bugfix
5326 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5327 - Always retry v2 single onion service intro and rend circuits with
5328 a 3-hop path. Previously, v2 single onion services used a 3-hop
5329 path when rendezvous circuits were retried after a remote or
5330 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5331 23818; bugfix on 0.2.9.3-alpha.
5332 - Make v3 single onion services fall back to a 3-hop intro, when all
5333 intro points are unreachable via a 1-hop path. Previously, v3
5334 single onion services failed when all intro nodes were unreachable
5335 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5337 o Documentation (backport from 0.4.2.1-alpha):
5338 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5339 notice.html so that operators no longer have to host it
5340 themselves. Closes ticket 31089.
5342 o Testing (backport from 0.4.1.2-alpha):
5343 - Specify torrc paths (with empty files) when launching tor in
5344 integration tests; refrain from reading user and system torrcs.
5345 Resolves issue 29702.
5347 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5348 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5350 o Testing (continuous integration, backport from 0.4.1.5):
5351 - In Travis, make stem log a controller trace to the console, and
5352 tail stem's tor log after failure. Closes ticket 30591.
5353 - In Travis, only run the stem tests that use a tor binary. Closes
5356 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5357 - Disable all but one Travis CI macOS build, to mitigate slow
5358 scheduling of Travis macOS jobs. Closes ticket 32177.
5359 - Run the chutney IPv6 networks as part of Travis CI. Closes
5361 - Simplify the Travis CI build matrix, and optimise for build time.
5362 Closes ticket 31859.
5363 - Use Windows Server 2019 instead of Windows Server 2016 in our
5364 Appveyor builds. Closes ticket 32086.
5366 o Testing (continuous integration, backport from 0.4.2.4-rc):
5367 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5368 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5369 until we can fix some Bionic permissions issues (see ticket
5370 32240). Related to ticket 31919.
5371 - Install the mingw OpenSSL package in Appveyor. This makes sure
5372 that the OpenSSL headers and libraries match in Tor's Appveyor
5373 builds. (This bug was triggered by an Appveyor image update.)
5374 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5375 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5377 o Testing (continuous integration, backport from 0.4.2.5):
5378 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5379 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5380 Build some jobs with -std=gnu99, and some jobs without.
5381 Closes ticket 32500.
5383 Changes in version 0.3.5.9 - 2019-12-09
5384 Tor 0.3.5.9 backports serveral fixes from later releases, including
5385 several that affect bridge users, relay stability, onion services,
5388 o Directory authority changes (backport from 0.4.1.5):
5389 - The directory authority "dizum" has a new IP address. Closes
5392 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5393 - Consider our directory information to have changed when our list
5394 of bridges changes. Previously, Tor would not re-compute the
5395 status of its directory information when bridges changed, and
5396 therefore would not realize that it was no longer able to build
5397 circuits. Fixes part of bug 29875.
5398 - Do not count previously configured working bridges towards our
5399 total of working bridges. Previously, when Tor's list of bridges
5400 changed, it would think that the old bridges were still usable,
5401 and delay fetching router descriptors for the new ones. Fixes part
5402 of bug 29875; bugfix on 0.3.0.1-alpha.
5404 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5405 - When considering upgrading circuits from "waiting for guard" to
5406 "open", always ignore circuits that are marked for close. Otherwise,
5407 we can end up in the situation where a subsystem is notified that
5408 a closing circuit has just opened, leading to undesirable
5409 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5411 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5412 - When running with NSS, disable TLS 1.2 ciphersuites that use
5413 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5414 these ciphersuites don't work -- which caused relays to fail to
5415 handshake with one another when these ciphersuites were enabled.
5416 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5418 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5419 - Properly clean up the introduction point map when circuits change
5420 purpose from onion service circuits to pathbias, measurement, or
5421 other circuit types. This should fix some service-side instances
5422 of introduction point failure. Fixes bug 29034; bugfix
5425 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5426 - Fix an unreachable bug in which an introduction point could try to
5427 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5428 to encode, leading the relay to assert(). We've consolidated the
5429 ABI values into Trunnel now. Fixes bug 30454; bugfix
5431 - Clients can now handle unknown status codes from INTRODUCE_ACK
5432 cells. (The NACK behavior will stay the same.) This will allow us
5433 to extend status codes in the future without breaking the normal
5434 client behavior. Fixes another part of bug 30454; bugfix
5437 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5438 - Stop ignoring torrc options after an %include directive, when the
5439 included directory ends with a file that does not contain any
5440 config options (but does contain comments or whitespace). Fixes
5441 bug 31408; bugfix on 0.3.1.1-alpha.
5443 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5444 - Onion services now always use the exact number of intro points
5445 configured with the HiddenServiceNumIntroductionPoints option (or
5446 fewer if nodes are excluded). Before, a service could sometimes
5447 pick more intro points than configured. Fixes bug 31548; bugfix
5450 o Minor features (address selection, backport from 0.4.0.3-alpha):
5451 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5452 private for others. This subnet is the RFC 6598 (Carrier Grade
5453 NAT) IP range, and is deployed by many ISPs as an alternative to
5454 RFC 1918 that does not break existing internal networks. Tor now
5455 blocks SOCKS and control ports on these addresses and warns users
5456 if client ports or ExtORPorts are listening on a RFC 6598 address.
5457 Closes ticket 28525. Patch by Neel Chauhan.
5459 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
5460 - Make bandwidth authorities ignore relays that are reported in the
5461 bandwidth file with the flag "vote=0". This change allows us to
5462 report unmeasured relays for diagnostic reasons without including
5463 their bandwidth in the bandwidth authorities' vote. Closes
5466 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5467 - Add a "--list-modules" command to print a list of which compile-
5468 time modules are enabled. Closes ticket 30452.
5470 o Minor features (continuous integration, backport from 0.4.0.4-rc):
5471 - On Travis Rust builds, cleanup Rust registry and refrain from
5472 caching the "target/" directory to speed up builds. Resolves
5475 o Minor features (continuous integration, backport from 0.4.0.5):
5476 - In Travis, tell timelimit to use stem's backtrace signals, and
5477 launch python directly from timelimit, so python receives the
5478 signals from timelimit, rather than make. Closes ticket 30117.
5480 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5481 - Remove sudo configuration lines from .travis.yml as they are no
5482 longer needed with current Travis build environment. Resolves
5485 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5486 - Our Travis configuration now uses Chutney to run some network
5487 integration tests automatically. Closes ticket 29280.
5489 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5490 - When building on Appveyor and Travis, pass the "-k" flag to make,
5491 so that we are informed of all compilation failures, not just the
5492 first one or two. Closes ticket 31372.
5494 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5495 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5496 in December 2018 (of which ~122 were still functional), with a
5497 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5498 in June 2019. Closes ticket 28795.
5500 o Minor features (geoip, backport from 0.4.2.5):
5501 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5502 Country database. Closes ticket 32685.
5504 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
5505 - Try to log an error from NSS (if there is any) and a more useful
5506 description of our situation if we are using NSS and a call to
5507 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5509 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5510 - Change "make test-stem" so it only runs the stem tests that use
5511 tor. This change makes test-stem faster and more reliable. Closes
5514 o Minor bugfixes (security, backport from 0.4.0.4-rc):
5515 - Verify in more places that we are not about to create a buffer
5516 with more than INT_MAX bytes, to avoid possible OOB access in the
5517 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5518 fixed by Tobias Stoeckmann.
5519 - Fix a potential double free bug when reading huge bandwidth files.
5520 The issue is not exploitable in the current Tor network because
5521 the vulnerable code is only reached when directory authorities
5522 read bandwidth files, but bandwidth files come from a trusted
5523 source (usually the authorities themselves). Furthermore, the
5524 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5525 which are not used by any of the current authorities. Fixes bug
5526 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5529 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
5530 - Reset coverage state on disk after Travis CI has finished. This
5531 should prevent future coverage merge errors from causing the test
5532 suite for the "process" subsystem to fail. The process subsystem
5533 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5535 - Terminate test-stem if it takes more than 9.5 minutes to run.
5536 (Travis terminates the job after 10 minutes of no output.)
5537 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5539 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5540 - Avoid spurious errors when Appveyor CI fails before the install step.
5541 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5543 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5544 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5545 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5547 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
5548 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5549 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5552 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5553 - Fix a logic error that prevented the SessionGroup sub-option from
5554 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5556 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5557 - Fix a BUG() assertion that occurs within a very small race window
5558 between when a client intro circuit opens and when its descriptor
5559 gets cleaned up from the cache. The circuit is now closed early,
5560 which will trigger a re-fetch of the descriptor and continue the
5561 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5563 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5564 - Don't believe clock skew results from NETINFO cells that appear to
5565 arrive before we sent the VERSIONS cells they are responding to.
5566 Previously, we would accept them up to 3 minutes "in the past".
5567 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5569 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5570 - Fix a compilation warning on Windows about casting a function
5571 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5574 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5575 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5576 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5578 o Minor bugfixes (compilation, backport from 0.4.1.5):
5579 - Avoid using labs() on time_t, which can cause compilation warnings
5580 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5582 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5583 - Suppress spurious float-conversion warnings from GCC when calling
5584 floating-point classifier functions on FreeBSD. Fixes part of bug
5585 31687; bugfix on 0.3.1.5-alpha.
5587 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5588 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5589 due to missing declarations of abort(), and prevent other such
5590 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5592 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5593 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5594 want authentication along with configured (but unused!)
5595 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5597 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5598 - Avoid trying to read data from closed connections, which can cause
5599 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5600 30344; bugfix on 0.1.1.1-alpha.
5602 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5603 - Allow the test-stem job to fail in Travis, because it sometimes
5604 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5605 - Skip test_rebind on macOS in Travis, because it is unreliable on
5606 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5607 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5608 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5610 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5611 - Avoid a set of possible code paths that could try to use freed
5612 memory in routerlist_free() while Tor was exiting. Fixes bug
5613 31003; bugfix on 0.1.2.2-alpha.
5615 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5616 - Stop crashing after parsing an unknown descriptor purpose
5617 annotation. We think this bug can only be triggered by modifying a
5618 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5620 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5621 - Move the "bandwidth-file-headers" line in directory authority
5622 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5625 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5626 - On abort, try harder to flush the output buffers of log messages.
5627 On some platforms (macOS), log messages could be discarded when
5628 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5629 - Report the tor version whenever an assertion fails. Previously, we
5630 only reported the Tor version on some crashes, and some non-fatal
5631 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5633 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5634 - When extracting an IPv6 address from a PF-based proxy, verify that
5635 we are actually configured to receive an IPv6 address, and log an
5636 internal error if not. Fixes part of bug 31687; bugfix
5639 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5640 - When tor is missing descriptors for some primary entry guards,
5641 make the log message less alarming. It's normal for descriptors to
5642 expire, as long as tor fetches new ones soon after. Fixes bug
5643 31657; bugfix on 0.3.3.1-alpha.
5645 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
5646 - Avoid logging that we are relaxing a circuit timeout when that
5647 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
5649 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
5650 - Correct a misleading error message when IPv4Only or IPv6Only is
5651 used but the resolved address can not be interpreted as an address
5652 of the specified IP version. Fixes bug 13221; bugfix on
5653 0.2.3.9-alpha. Patch from Kris Katterjohn.
5654 - Log the correct port number for listening sockets when "auto" is
5655 used to let Tor pick the port number. Previously, port 0 was
5656 logged instead of the actual port number. Fixes bug 29144; bugfix
5657 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5658 - Stop logging a BUG() warning when Tor is waiting for exit
5659 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5661 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5662 - Do not log a warning when running with an OpenSSL version other
5663 than the one Tor was compiled with, if the two versions should be
5664 compatible. Previously, we would warn whenever the version was
5665 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5667 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5668 - Change log level of message "Hash of session info was not as
5669 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5672 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5673 - Rate-limit our the logging message about the obsolete .exit
5674 notation. Previously, there was no limit on this warning, which
5675 could potentially be triggered many times by a hostile website.
5676 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5678 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5679 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5680 cell on a connection using the obsolete v1 link protocol. Log a
5681 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5683 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5684 - Reset the periodic events' "enabled" flag when Tor is shut down
5685 cleanly. Previously, this flag was left on, which caused periodic
5686 events not to be re-enabled when Tor was relaunched in-process
5687 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5690 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5691 - Avoid a minor memory leak that could occur on relays when failing
5692 to create a "keys" directory. Fixes bug 30148; bugfix
5695 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5696 - Fix a trivial memory leak when parsing an invalid value
5697 from a download schedule in the configuration. Fixes bug
5698 30894; bugfix on 0.3.4.1-alpha.
5700 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
5701 - Refactor the shared random state's memory management so that it
5702 actually takes ownership of the shared random value pointers.
5703 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5705 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
5706 - Stop leaking parts of the shared random state in the shared-random
5707 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5709 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5710 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5711 implemenation) when failing to load an onion service client
5712 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5714 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5715 - When purging the DNS cache because of an out-of-memory condition,
5716 try purging just the older entries at first. Previously, we would
5717 always purge the whole thing. Fixes bug 29617; bugfix
5720 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5721 - Avoid crashing in our tor_vasprintf() implementation on systems
5722 that define neither vasprintf() nor _vscprintf(). (This bug has
5723 been here long enough that we question whether people are running
5724 Tor on such systems, but we're applying the fix out of caution.)
5725 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5728 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5729 - Avoid crashing when starting with a corrupt keys directory where
5730 the old ntor key and the new ntor key are identical. Fixes bug
5731 30916; bugfix on 0.2.4.8-alpha.
5733 o Minor bugfixes (rust, backport from 0.4.0.5):
5734 - Abort on panic in all build profiles, instead of potentially
5735 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5737 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5738 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5739 31463; bugfix on 0.3.5.4-alpha.
5741 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
5742 - Allow connections to single onion services to remain idle without
5743 being disconnected. Previously, relays acting as rendezvous points
5744 for single onion services were mistakenly closing idle rendezvous
5745 circuits after 60 seconds, thinking that they were unused
5746 directory-fetching circuits that had served their purpose. Fixes
5747 bug 29665; bugfix on 0.2.1.26.
5749 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
5750 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5751 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5754 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
5755 - Downgrade some LOG_ERR messages in the address/* tests to
5756 warnings. The LOG_ERR messages were occurring when we had no
5757 configured network. We were failing the unit tests, because we
5758 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5759 29530; bugfix on 0.3.5.8.
5760 - Fix our gcov wrapper script to look for object files at the
5761 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5763 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
5764 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5765 recent test-network.sh to use new chutney features in CI. Fixes
5766 bug 29703; bugfix on 0.2.9.1-alpha.
5767 - Fix a test failure on Windows caused by an unexpected "BUG"
5768 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5771 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5772 - When testing port rebinding, don't busy-wait for tor to log.
5773 Instead, actually sleep for a short time before polling again.
5774 Also improve the formatting of control commands and log messages.
5775 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5777 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
5778 - When classifying a client's selection of TLS ciphers, if the
5779 client ciphers are not yet available, do not cache the result.
5780 Previously, we had cached the unavailability of the cipher list
5781 and never looked again, which in turn led us to assume that the
5782 client only supported the ancient V1 link protocol. This, in turn,
5783 was causing Stem integration tests to stall in some cases. Fixes
5784 bug 30021; bugfix on 0.2.4.8-alpha.
5786 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5787 - Log bugs about the TLS read buffer's length only once, rather than
5788 filling the logs with similar warnings. Fixes bug 31939; bugfix
5791 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5792 - Always retry v2 single onion service intro and rend circuits with
5793 a 3-hop path. Previously, v2 single onion services used a 3-hop
5794 path when rendezvous circuits were retried after a remote or
5795 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5796 23818; bugfix on 0.2.9.3-alpha.
5797 - Make v3 single onion services fall back to a 3-hop intro, when all
5798 intro points are unreachable via a 1-hop path. Previously, v3
5799 single onion services failed when all intro nodes were unreachable
5800 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5802 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
5803 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5804 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5805 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5806 fast_finish, so failed jobs terminate the build immediately. Fixes
5807 bug 29601; bugfix on 0.3.5.4-alpha.
5809 o Documentation (backport from 0.4.2.1-alpha):
5810 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5811 notice.html so that operators no longer have to host it
5812 themselves. Closes ticket 31089.
5814 o Testing (backport from 0.4.1.2-alpha):
5815 - Specify torrc paths (with empty files) when launching tor in
5816 integration tests; refrain from reading user and system torrcs.
5817 Resolves issue 29702.
5819 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5820 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5822 o Testing (continuous integration, backport from 0.4.1.5):
5823 - In Travis, make stem log a controller trace to the console, and
5824 tail stem's tor log after failure. Closes ticket 30591.
5825 - In Travis, only run the stem tests that use a tor binary. Closes
5828 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5829 - Disable all but one Travis CI macOS build, to mitigate slow
5830 scheduling of Travis macOS jobs. Closes ticket 32177.
5831 - Run the chutney IPv6 networks as part of Travis CI. Closes
5833 - Simplify the Travis CI build matrix, and optimise for build time.
5834 Closes ticket 31859.
5835 - Use Windows Server 2019 instead of Windows Server 2016 in our
5836 Appveyor builds. Closes ticket 32086.
5838 o Testing (continuous integration, backport from 0.4.2.4-rc):
5839 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5840 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5841 until we can fix some Bionic permissions issues (see ticket
5842 32240). Related to ticket 31919.
5843 - Install the mingw OpenSSL package in Appveyor. This makes sure
5844 that the OpenSSL headers and libraries match in Tor's Appveyor
5845 builds. (This bug was triggered by an Appveyor image update.)
5846 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5847 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5849 o Testing (continuous integration, backport from 0.4.2.5):
5850 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5851 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5852 Build some jobs with -std=gnu99, and some jobs without.
5853 Closes ticket 32500.
5855 Changes in version 0.4.2.4-rc - 2019-11-15
5856 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
5857 several bugs from earlier versions, including a few that would result in
5858 stack traces or incorrect behavior.
5860 o Minor features (build system):
5861 - Make pkg-config use --prefix when cross-compiling, if
5862 PKG_CONFIG_PATH is not set. Closes ticket 32191.
5864 o Minor features (geoip):
5865 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
5866 Country database. Closes ticket 32440.
5868 o Minor bugfixes (client, onion service v3):
5869 - Fix a BUG() assertion that occurs within a very small race window
5870 between when a client intro circuit opens and when its descriptor
5871 gets cleaned up from the cache. The circuit is now closed early,
5872 which will trigger a re-fetch of the descriptor and continue the
5873 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5875 o Minor bugfixes (code quality):
5876 - Fix "make check-includes" so it runs correctly on out-of-tree
5877 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
5879 o Minor bugfixes (configuration):
5880 - Log the option name when skipping an obsolete option. Fixes bug
5881 32295; bugfix on 0.4.2.1-alpha.
5883 o Minor bugfixes (crash):
5884 - When running Tor with an option like --verify-config or
5885 --dump-config that does not start the event loop, avoid crashing
5886 if we try to exit early because of an error. Fixes bug 32407;
5887 bugfix on 0.3.3.1-alpha.
5889 o Minor bugfixes (directory):
5890 - When checking if a directory connection is anonymous, test if the
5891 circuit was marked for close before looking at its channel. This
5892 avoids a BUG() stacktrace if the circuit was previously closed.
5893 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
5895 o Minor bugfixes (shellcheck):
5896 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
5897 32402; bugfix on 0.4.2.1-alpha.
5898 - Start checking most scripts for shellcheck errors again. Fixes bug
5899 32402; bugfix on 0.4.2.1-alpha.
5901 o Testing (continuous integration):
5902 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5903 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5904 until we can fix some Bionic permissions issues (see ticket
5905 32240). Related to ticket 31919.
5906 - Install the mingw OpenSSL package in Appveyor. This makes sure
5907 that the OpenSSL headers and libraries match in Tor's Appveyor
5908 builds. (This bug was triggered by an Appveyor image update.)
5909 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5910 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5913 Changes in version 0.4.2.3-alpha - 2019-10-24
5914 This release fixes several bugs from the previous alpha release, and
5915 from earlier versions of Tor.
5917 o Major bugfixes (relay):
5918 - Relays now respect their AccountingMax bandwidth again. When
5919 relays entered "soft" hibernation (which typically starts when
5920 we've hit 90% of our AccountingMax), we had stopped checking
5921 whether we should enter hard hibernation. Soft hibernation refuses
5922 new connections and new circuits, but the existing circuits can
5923 continue, meaning that relays could have exceeded their configured
5924 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5926 o Major bugfixes (v3 onion services):
5927 - Onion services now always use the exact number of intro points
5928 configured with the HiddenServiceNumIntroductionPoints option (or
5929 fewer if nodes are excluded). Before, a service could sometimes
5930 pick more intro points than configured. Fixes bug 31548; bugfix
5933 o Minor feature (onion services, control port):
5934 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
5935 (v3) onion services. Previously it defaulted to RSA1024 (v2).
5936 Closes ticket 29669.
5938 o Minor features (testing):
5939 - When running tests that attempt to look up hostnames, replace the
5940 libc name lookup functions with ones that do not actually touch
5941 the network. This way, the tests complete more quickly in the
5942 presence of a slow or missing DNS resolver. Closes ticket 31841.
5944 o Minor features (testing, continuous integration):
5945 - Disable all but one Travis CI macOS build, to mitigate slow
5946 scheduling of Travis macOS jobs. Closes ticket 32177.
5947 - Run the chutney IPv6 networks as part of Travis CI. Closes
5949 - Simplify the Travis CI build matrix, and optimise for build time.
5950 Closes ticket 31859.
5951 - Use Windows Server 2019 instead of Windows Server 2016 in our
5952 Appveyor builds. Closes ticket 32086.
5954 o Minor bugfixes (build system):
5955 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
5956 32124; bugfix on 0.3.4.1-alpha.
5957 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
5959 - Stop failing when jemalloc is requested, but tcmalloc is not
5960 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
5961 - When pkg-config is not installed, or a library that depends on
5962 pkg-config is not found, tell the user what to do to fix the
5963 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
5965 o Minor bugfixes (connections):
5966 - Avoid trying to read data from closed connections, which can cause
5967 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5968 30344; bugfix on 0.1.1.1-alpha.
5970 o Minor bugfixes (error handling):
5971 - Always lock the backtrace buffer before it is used. Fixes bug
5972 31734; bugfix on 0.2.5.3-alpha.
5974 o Minor bugfixes (mainloop, periodic events, in-process API):
5975 - Reset the periodic events' "enabled" flag when Tor is shut down
5976 cleanly. Previously, this flag was left on, which caused periodic
5977 events not to be re-enabled when Tor was relaunched in-process
5978 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5981 o Minor bugfixes (process management):
5982 - Remove overly strict assertions that triggered when a pluggable
5983 transport failed to launch. Fixes bug 31091; bugfix
5985 - Remove an assertion in the Unix process backend. This assertion
5986 would trigger when we failed to find the executable for a child
5987 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5989 o Minor bugfixes (testing):
5990 - Avoid intermittent test failures due to a test that had relied on
5991 inconsistent timing sources. Fixes bug 31995; bugfix
5993 - When testing port rebinding, don't busy-wait for tor to log.
5994 Instead, actually sleep for a short time before polling again.
5995 Also improve the formatting of control commands and log messages.
5996 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5998 o Minor bugfixes (tls, logging):
5999 - Log bugs about the TLS read buffer's length only once, rather than
6000 filling the logs with similar warnings. Fixes bug 31939; bugfix
6003 o Minor bugfixes (v3 onion services):
6004 - Fix an implicit conversion from ssize_t to size_t discovered by
6005 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
6006 - Fix a memory leak in an unlikely error code path when encoding HS
6007 DoS establish intro extension cell. Fixes bug 32063; bugfix
6009 - When cleaning up intro circuits for a v3 onion service, don't
6010 remove circuits that have an established or pending circuit, even
6011 if they ran out of retries. This way, we don't remove a circuit on
6012 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
6015 - Correct the description of "GuardLifetime". Fixes bug 31189;
6016 bugfix on 0.3.0.1-alpha.
6017 - Make clear in the man page, in both the bandwidth section and the
6018 AccountingMax section, that Tor counts in powers of two, not
6019 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
6020 bytes. Resolves ticket 32106.
6023 Changes in version 0.4.2.2-alpha - 2019-10-07
6024 This release fixes several bugs from the previous alpha release, and
6025 from earlier versions. It also includes a change in authorities, so
6026 that they begin to reject the currently unsupported release series.
6028 o Major features (directory authorities):
6029 - Directory authorities now reject relays running all currently
6030 deprecated release series. The currently supported release series
6031 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
6033 o Major bugfixes (embedded Tor):
6034 - Avoid a possible crash when restarting Tor in embedded mode and
6035 enabling a different set of publish/subscribe messages. Fixes bug
6036 31898; bugfix on 0.4.1.1-alpha.
6038 o Major bugfixes (torrc parsing):
6039 - Stop ignoring torrc options after an %include directive, when the
6040 included directory ends with a file that does not contain any
6041 config options (but does contain comments or whitespace). Fixes
6042 bug 31408; bugfix on 0.3.1.1-alpha.
6044 o Minor features (auto-formatting scripts):
6045 - When annotating C macros, never generate a line that our check-
6046 spaces script would reject. Closes ticket 31759.
6047 - When annotating C macros, try to remove cases of double-negation.
6048 Closes ticket 31779.
6050 o Minor features (continuous integration):
6051 - When building on Appveyor and Travis, pass the "-k" flag to make,
6052 so that we are informed of all compilation failures, not just the
6053 first one or two. Closes ticket 31372.
6055 o Minor features (geoip):
6056 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
6057 Country database. Closes ticket 31931.
6059 o Minor features (maintenance scripts):
6060 - Add a Coccinelle script to detect bugs caused by incrementing or
6061 decrementing a variable inside a call to log_debug(). Since
6062 log_debug() is a macro whose arguments are conditionally
6063 evaluated, it is usually an error to do this. One such bug was
6064 30628, in which SENDME cells were miscounted by a decrement
6065 operator inside a log_debug() call. Closes ticket 30743.
6067 o Minor features (onion services v3):
6068 - Assist users who try to setup v2 client authorization in v3 onion
6069 services by pointing them to the right documentation. Closes
6072 o Minor bugfixes (Appveyor continuous integration):
6073 - Avoid spurious errors when Appveyor CI fails before the install
6074 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
6076 o Minor bugfixes (best practices tracker):
6077 - When listing overbroad exceptions, do not also list problems, and
6078 do not list insufficiently broad exceptions. Fixes bug 31338;
6079 bugfix on 0.4.2.1-alpha.
6081 o Minor bugfixes (controller protocol):
6082 - Fix the MAPADDRESS controller command to accept one or more
6083 arguments. Previously, it required two or more arguments, and
6084 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6086 o Minor bugfixes (logging):
6087 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
6088 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
6089 - Disable backtrace signal handlers when shutting down tor. Fixes
6090 bug 31614; bugfix on 0.2.5.2-alpha.
6091 - Rate-limit our the logging message about the obsolete .exit
6092 notation. Previously, there was no limit on this warning, which
6093 could potentially be triggered many times by a hostile website.
6094 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
6095 - When initialising log domain masks, only set known log domains.
6096 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
6098 o Minor bugfixes (logging, protocol violations):
6099 - Do not log a nonfatal assertion failure when receiving a VERSIONS
6100 cell on a connection using the obsolete v1 link protocol. Log a
6101 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
6103 o Minor bugfixes (modules):
6104 - Explain what the optional Directory Authority module is, and what
6105 happens when it is disabled. Fixes bug 31825; bugfix
6108 o Minor bugfixes (multithreading):
6109 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
6110 31736; bugfix on 0.0.7.
6112 o Minor bugfixes (relay):
6113 - Avoid crashing when starting with a corrupt keys directory where
6114 the old ntor key and the new ntor key are identical. Fixes bug
6115 30916; bugfix on 0.2.4.8-alpha.
6117 o Minor bugfixes (tests, SunOS):
6118 - Avoid a map_anon_nofork test failure due to a signed/unsigned
6119 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
6121 o Code simplification and refactoring:
6122 - Refactor connection_control_process_inbuf() to reduce the size of
6123 a practracker exception. Closes ticket 31840.
6124 - Refactor the microdescs_parse_from_string() function into smaller
6125 pieces, for better comprehensibility. Closes ticket 31675.
6126 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
6127 tests and fuzzers, rather than using hard-coded values. Closes
6129 - Interface for function `decrypt_desc_layer` cleaned up. Closes
6133 - Document the signal-safe logging behaviour in the tor man page.
6134 Also add some comments to the relevant functions. Closes
6136 - Explain why we can't destroy the backtrace buffer mutex. Explain
6137 why we don't need to destroy the log mutex. Closes ticket 31736.
6138 - The Tor source code repository now includes a (somewhat dated)
6139 description of Tor's modular architecture, in doc/HACKING/design.
6140 This is based on the old "tor-guts.git" repository, which we are
6141 adopting and superseding. Closes ticket 31849.
6144 Changes in version 0.4.1.6 - 2019-09-19
6145 This release backports several bugfixes to improve stability and
6146 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
6147 or experiencing reliability issues with single onion services, should
6150 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
6151 - Tolerate systems (including some Android installations) where
6152 madvise and MADV_DONTDUMP are available at build-time, but not at
6153 run time. Previously, these systems would notice a failed syscall
6154 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6155 - Tolerate systems (including some Linux installations) where
6156 madvise and/or MADV_DONTFORK are available at build-time, but not
6157 at run time. Previously, these systems would notice a failed
6158 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6160 o Minor features (stem tests, backport from 0.4.2.1-alpha):
6161 - Change "make test-stem" so it only runs the stem tests that use
6162 tor. This change makes test-stem faster and more reliable. Closes
6165 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
6166 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6167 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6169 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
6170 - Add more stub functions to fix compilation on Android with link-
6171 time optimization when --disable-module-dirauth is used.
6172 Previously, these compilation settings would make the compiler
6173 look for functions that didn't exist. Fixes bug 31552; bugfix
6175 - Suppress spurious float-conversion warnings from GCC when calling
6176 floating-point classifier functions on FreeBSD. Fixes part of bug
6177 31687; bugfix on 0.3.1.5-alpha.
6179 o Minor bugfixes (controller protocol):
6180 - Fix the MAPADDRESS controller command to accept one or more
6181 arguments. Previously, it required two or more arguments, and ignored
6182 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
6184 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
6185 - When extracting an IPv6 address from a PF-based proxy, verify that
6186 we are actually configured to receive an IPv6 address, and log an
6187 internal error if not. Fixes part of bug 31687; bugfix
6190 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
6191 - When tor is missing descriptors for some primary entry guards,
6192 make the log message less alarming. It's normal for descriptors to
6193 expire, as long as tor fetches new ones soon after. Fixes bug
6194 31657; bugfix on 0.3.3.1-alpha.
6196 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
6197 - Change log level of message "Hash of session info was not as
6198 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6201 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
6202 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6203 31463; bugfix on 0.3.5.4-alpha.
6205 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
6206 - Always retry v2 single onion service intro and rend circuits with
6207 a 3-hop path. Previously, v2 single onion services used a 3-hop
6208 path when rendezvous circuits were retried after a remote or
6209 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6210 23818; bugfix on 0.2.9.3-alpha.
6212 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
6213 - Always retry v3 single onion service intro and rend circuits with
6214 a 3-hop path. Previously, v3 single onion services used a 3-hop
6215 path when rend circuits were retried after a remote or delayed
6216 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6217 bugfix on 0.3.2.1-alpha.
6218 - Make v3 single onion services fall back to a 3-hop intro, when all
6219 intro points are unreachable via a 1-hop path. Previously, v3
6220 single onion services failed when all intro nodes were unreachable
6221 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6223 o Documentation (backport from 0.4.2.1-alpha):
6224 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6225 notice.html so that operators no longer have to host it
6226 themselves. Closes ticket 31089.
6229 Changes in version 0.4.2.1-alpha - 2019-09-17
6230 This is the first alpha release in the 0.4.2.x series. It adds new
6231 defenses for denial-of-service attacks against onion services. It also
6232 includes numerous kinds of bugfixes and refactoring to help improve
6233 Tor's stability and ease of development.
6235 o Major features (onion service v3, denial of service):
6236 - Add onion service introduction denial of service defenses. Intro
6237 points can now rate-limit client introduction requests, using
6238 parameters that can be sent by the service within the
6239 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6240 the intro point will honor the consensus parameters. Closes
6243 o Major bugfixes (circuit build, guard):
6244 - When considering upgrading circuits from "waiting for guard" to
6245 "open", always ignore circuits that are marked for close.
6246 Previously we could end up in the situation where a subsystem is
6247 notified of a circuit opening, but the circuit is still marked for
6248 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6251 o Major bugfixes (crash, Linux, Android):
6252 - Tolerate systems (including some Android installations) where
6253 madvise and MADV_DONTDUMP are available at build-time, but not at
6254 run time. Previously, these systems would notice a failed syscall
6255 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6256 - Tolerate systems (including some Linux installations) where
6257 madvise and/or MADV_DONTFORK are available at build-time, but not
6258 at run time. Previously, these systems would notice a failed
6259 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6261 o Minor features (best practices tracker):
6262 - Our best-practices tracker now integrates with our include-checker
6263 tool to keep track of how many layering violations we have not yet
6264 fixed. We hope to reduce this number over time to improve Tor's
6265 modularity. Closes ticket 31176.
6266 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6267 practracker from the environment. We may want this for continuous
6268 integration. Closes ticket 31309.
6269 - Give a warning rather than an error when a practracker exception
6270 is violated by a small amount, add a --list-overbroad option to
6271 practracker that lists exceptions that are stricter than they need
6272 to be, and provide an environment variable for disabling
6273 practracker. Closes ticket 30752.
6274 - Our best-practices tracker now looks at headers as well as C
6275 files. Closes ticket 31175.
6277 o Minor features (build system):
6278 - Add --disable-manpage and --disable-html-manual options to
6279 configure script. This will enable shortening build times by not
6280 building documentation. Resolves issue 19381.
6282 o Minor features (compilation):
6283 - Log a more useful error message when we are compiling and one of
6284 the compile-time hardening options we have selected can be linked
6285 but not executed. Closes ticket 27530.
6287 o Minor features (configuration):
6288 - The configuration code has been extended to allow splitting
6289 configuration data across multiple objects. Previously, all
6290 configuration data needed to be kept in a single object, which
6291 tended to become bloated. Closes ticket 31240.
6293 o Minor features (continuous integration):
6294 - When running CI builds on Travis, put some random data in
6295 ~/.torrc, to make sure no tests are reading the Tor configuration
6296 file from its default location. Resolves issue 30102.
6298 o Minor features (debugging):
6299 - Log a nonfatal assertion failure if we encounter a configuration
6300 line whose command is "CLEAR" but which has a nonempty value. This
6301 should be impossible, according to the rules of our configuration
6302 line parsing. Closes ticket 31529.
6304 o Minor features (git hooks):
6305 - Our pre-commit git hook now checks for a special file before
6306 running practracker, so that practracker only runs on branches
6307 that are based on master. Since the pre-push hook calls the pre-
6308 commit hook, practracker will also only run before pushes of
6309 branches based on master. Closes ticket 30979.
6311 o Minor features (git scripts):
6312 - Add a "--" command-line argument, to separate git-push-all.sh
6313 script arguments from arguments that are passed through to git
6314 push. Closes ticket 31314.
6315 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6316 can push test branches to a personal remote. Closes ticket 31314.
6317 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6318 git-push-all.sh, which makes these scripts create, merge forward,
6319 and push test branches. Closes ticket 31314.
6320 - Add a -u argument to git-merge-forward.sh, so that the script can
6321 re-use existing test branches after a merge failure and fix.
6322 Closes ticket 31314.
6323 - Add a TOR_GIT_PUSH env var, which sets the default git push
6324 command and arguments for git-push-all.sh. Closes ticket 31314.
6325 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6326 script push master and maint branches with a delay between each
6327 branch. These delays trigger the CI jobs in a set order, which
6328 should show the most likely failures first. Also make pushes
6329 atomic by default, and make the script pass any command-line
6330 arguments to git push. Closes ticket 29879.
6331 - Call the shellcheck script from the pre-commit hook. Closes
6333 - Skip pushing test branches that are the same as a remote
6334 maint/release/master branch in git-push-all.sh by default. Add a
6335 -s argument, so git-push-all.sh can push all test branches. Closes
6338 o Minor features (IPv6, logging):
6339 - Log IPv6 addresses as well as IPv4 addresses when describing
6340 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6342 o Minor features (onion service v3):
6343 - Do not allow single hop clients to fetch or post an HS descriptor
6344 from an HSDir. Closes ticket 24964.
6346 o Minor features (onion service):
6347 - Disallow single-hop clients at the introduction point. We've
6348 removed Tor2web support a while back and single-hop rendezvous
6349 attempts are blocked at the relays. This change should remove load
6350 off the network from spammy clients. Close ticket 24963.
6352 o Minor features (stem tests):
6353 - Change "make test-stem" so it only runs the stem tests that use
6354 tor. This change makes test-stem faster and more reliable. Closes
6357 o Minor features (testing):
6358 - Add a script to invoke "tor --dump-config" and "tor
6359 --verify-config" with various configuration options, and see
6360 whether tor's resulting configuration or error messages are what
6361 we expect. Use it for integration testing of our +Option and
6362 /Option flags. Closes ticket 31637.
6363 - Improve test coverage for our existing configuration parsing and
6364 management API. Closes ticket 30893.
6365 - Add integration tests to make sure that practracker gives the
6366 outputs we expect. Closes ticket 31477.
6367 - The practracker self-tests are now run as part of the Tor test
6368 suite. Closes ticket 31304.
6370 o Minor features (token bucket):
6371 - Implement a generic token bucket that uses a single counter, for
6372 use in anti-DoS onion service work. Closes ticket 30687.
6374 o Minor bugfixes (best practices tracker):
6375 - Fix a few issues in the best-practices script, including tests,
6376 tab tolerance, error reporting, and directory-exclusion logic.
6377 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6378 - When running check-best-practices, only consider files in the src
6379 subdirectory. Previously we had recursively considered all
6380 subdirectories, which made us get confused by the temporary
6381 directories made by "make distcheck". Fixes bug 31578; bugfix
6384 o Minor bugfixes (build system):
6385 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6386 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6388 o Minor bugfixes (chutney, makefiles, documentation):
6389 - "make test-network-all" now shows the warnings from each test-
6390 network.sh run on the console, so developers see new warnings
6391 early. We've also improved the documentation for this feature, and
6392 renamed a Makefile variable so the code is self-documenting. Fixes
6393 bug 30455; bugfix on 0.3.0.4-rc.
6395 o Minor bugfixes (compilation):
6396 - Add more stub functions to fix compilation on Android with link-
6397 time optimization when --disable-module-dirauth is used.
6398 Previously, these compilation settings would make the compiler
6399 look for functions that didn't exist. Fixes bug 31552; bugfix
6401 - Suppress spurious float-conversion warnings from GCC when calling
6402 floating-point classifier functions on FreeBSD. Fixes part of bug
6403 31687; bugfix on 0.3.1.5-alpha.
6405 o Minor bugfixes (configuration):
6406 - Invalid floating-point values in the configuration file are now
6407 treated as errors in the configuration. Previously, they were
6408 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6410 o Minor bugfixes (coverity):
6411 - Add an assertion when parsing a BEGIN cell so that coverity can be
6412 sure that we are not about to dereference a NULL address. Fixes
6413 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6414 - In our siphash implementation, when building for coverity, use
6415 memcpy in place of a switch statement, so that coverity can tell
6416 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6417 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6418 - Fix several coverity warnings from our unit tests. Fixes bug
6419 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6421 o Minor bugfixes (developer tooling):
6422 - Only log git script changes in the post-merge script when the
6423 merge was to the master branch. Fixes bug 31040; bugfix
6426 o Minor bugfixes (directory authorities):
6427 - Return a distinct status when formatting annotations fails. Fixes
6428 bug 30780; bugfix on 0.2.0.8-alpha.
6430 o Minor bugfixes (error handling):
6431 - On abort, try harder to flush the output buffers of log messages.
6432 On some platforms (macOS), log messages could be discarded when
6433 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6434 - Report the tor version whenever an assertion fails. Previously, we
6435 only reported the Tor version on some crashes, and some non-fatal
6436 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6437 - When tor aborts due to an error, close log file descriptors before
6438 aborting. Closing the logs makes some OSes flush log file buffers,
6439 rather than deleting buffered log lines. Fixes bug 31594; bugfix
6442 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
6443 - When extracting an IPv6 address from a PF-based proxy, verify that
6444 we are actually configured to receive an IPv6 address, and log an
6445 internal error if not. Fixes part of bug 31687; bugfix
6448 o Minor bugfixes (git hooks):
6449 - Remove a duplicate call to practracker from the pre-push hook. The
6450 pre-push hook already calls the pre-commit hook, which calls
6451 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
6453 o Minor bugfixes (git scripts):
6454 - Stop hard-coding the bash path in the git scripts. Some OSes don't
6455 have bash in /usr/bin, others have an ancient bash at this path.
6456 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
6457 - Stop hard-coding the tor master branch name and worktree path in
6458 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
6459 - Allow git-push-all.sh to be run from any directory. Previously,
6460 the script only worked if run from an upstream worktree directory.
6461 Closes ticket 31678.
6463 o Minor bugfixes (guards):
6464 - When tor is missing descriptors for some primary entry guards,
6465 make the log message less alarming. It's normal for descriptors to
6466 expire, as long as tor fetches new ones soon after. Fixes bug
6467 31657; bugfix on 0.3.3.1-alpha.
6469 o Minor bugfixes (ipv6):
6470 - Check for private IPv6 addresses alongside their IPv4 equivalents
6471 when authorities check descriptors. Previously, we only checked
6472 for private IPv4 addresses. Fixes bug 31088; bugfix on
6473 0.2.3.21-rc. Patch by Neel Chauhan.
6474 - When parsing microdescriptors, we should check the IPv6 exit
6475 policy alongside IPv4. Previously, we checked both exit policies
6476 for only router info structures, while microdescriptors were
6477 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
6480 o Minor bugfixes (logging):
6481 - Change log level of message "Hash of session info was not as
6482 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6484 - Fix a code issue that would have broken our parsing of log domains
6485 as soon as we had 33 of them. Fortunately, we still only have 29.
6486 Fixes bug 31451; bugfix on 0.4.1.4-rc.
6488 o Minor bugfixes (memory management):
6489 - Stop leaking a small amount of memory in nt_service_install(), in
6490 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
6493 o Minor bugfixes (networking, IP addresses):
6494 - When parsing addresses via Tor's internal DNS lookup API, reject
6495 IPv4 addresses in square brackets, and accept IPv6 addresses in
6496 square brackets. This change completes the work started in 23082,
6497 making address parsing consistent between tor's internal DNS
6498 lookup and address parsing APIs. Fixes bug 30721; bugfix
6500 - When parsing addresses via Tor's internal address:port parsing and
6501 DNS lookup APIs, require IPv6 addresses with ports to have square
6502 brackets. But allow IPv6 addresses without ports, whether or not
6503 they have square brackets. Fixes bug 30721; bugfix
6506 o Minor bugfixes (onion service v3):
6507 - When purging the client descriptor cache, close any introduction
6508 point circuits associated with purged cache entries. This avoids
6509 picking those circuits later when connecting to the same
6510 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
6512 o Minor bugfixes (onion services):
6513 - In the hs_ident_circuit_t data structure, remove the unused field
6514 circuit_type and the respective argument in hs_ident_circuit_new().
6515 This field was set by clients (for introduction) and services (for
6516 introduction and rendezvous) but was never used afterwards. Fixes
6517 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
6519 o Minor bugfixes (operator tools):
6520 - Make tor-print-ed-signing-cert(1) print certificate expiration
6521 date in RFC 1123 and UNIX timestamp formats, to make output
6522 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
6524 o Minor bugfixes (rust):
6525 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6526 31463; bugfix on 0.3.5.4-alpha.
6527 - Raise the minimum rustc version to 1.31.0, as checked by configure
6528 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
6530 o Minor bugfixes (sendme, code structure):
6531 - Rename the trunnel SENDME file definition from sendme.trunnel to
6532 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
6533 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
6535 o Minor bugfixes (statistics):
6536 - Stop removing the ed25519 signature if the extra info file is too
6537 big. If the signature data was removed, but the keyword was kept,
6538 this could result in an unparseable extra info file. Fixes bug
6539 30958; bugfix on 0.2.7.2-alpha.
6541 o Minor bugfixes (subsystems):
6542 - Make the subsystem init order match the subsystem module
6543 dependencies. Call windows process security APIs as early as
6544 possible. Initialize logging before network and time, so that
6545 network and time can use logging. Fixes bug 31615; bugfix
6548 o Minor bugfixes (testing):
6549 - Teach the util/socketpair_ersatz test to work correctly when we
6550 have no network stack configured. Fixes bug 30804; bugfix
6553 o Minor bugfixes (v2 single onion services):
6554 - Always retry v2 single onion service intro and rend circuits with
6555 a 3-hop path. Previously, v2 single onion services used a 3-hop
6556 path when rendezvous circuits were retried after a remote or
6557 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6558 23818; bugfix on 0.2.9.3-alpha.
6560 o Minor bugfixes (v3 single onion services):
6561 - Always retry v3 single onion service intro and rend circuits with
6562 a 3-hop path. Previously, v3 single onion services used a 3-hop
6563 path when rend circuits were retried after a remote or delayed
6564 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6565 bugfix on 0.3.2.1-alpha.
6566 - Make v3 single onion services fall back to a 3-hop intro, when all
6567 intro points are unreachable via a 1-hop path. Previously, v3
6568 single onion services failed when all intro nodes were unreachable
6569 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6572 - Improve documentation in circuit padding subsystem. Patch by
6573 Tobias Pulls. Closes ticket 31113.
6574 - Include an example usage for IPv6 ORPort in our sample torrc.
6575 Closes ticket 31320; patch from Ali Raheem.
6576 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6577 notice.html so that operators no longer have to host it
6578 themselves. Closes ticket 31089.
6581 - No longer include recommended package digests in votes as detailed
6582 in proposal 301. The RecommendedPackages torrc option is
6583 deprecated and will no longer have any effect. "package" lines
6584 will still be considered when computing consensuses for consensus
6585 methods that include them. (This change has no effect on the list
6586 of recommended Tor versions, which is still in use.) Closes
6588 - Remove torctl.in from contrib/dist directory. Resolves
6592 - Run shellcheck for all non-third-party shell scripts that are
6593 shipped with Tor. Closes ticket 29533.
6594 - When checking shell scripts, ignore any user-created directories.
6595 Closes ticket 30967.
6597 o Code simplification and refactoring (config handling):
6598 - Extract our variable manipulation code from confparse.c to a new
6599 lower-level typedvar.h module. Closes ticket 30864.
6600 - Lower another layer of object management from confparse.c to a
6601 more general tool. Now typed structure members are accessible via
6602 an abstract type. Implements ticket 30914.
6603 - Move our backend logic for working with configuration and state
6604 files into a lower-level library, since it no longer depends on
6605 any tor-specific functionality. Closes ticket 31626.
6606 - Numerous simplifications in configuration-handling logic: remove
6607 duplicated macro definitions, replace magical names with flags,
6608 and refactor "TestingTorNetwork" to use the same default-option
6609 logic as the rest of Tor. Closes ticket 30935.
6610 - Replace our ad-hoc set of flags for configuration variables and
6611 configuration variable types with fine-grained orthogonal flags
6612 corresponding to the actual behavior we want. Closes ticket 31625.
6614 o Code simplification and refactoring (misc):
6615 - Eliminate some uses of lower-level control reply abstractions,
6616 primarily in the onion_helper functions. Closes ticket 30889.
6617 - Rework bootstrap tracking to use the new publish-subscribe
6618 subsystem. Closes ticket 29976.
6619 - Rewrite format_node_description() and router_get_verbose_nickname()
6620 to use strlcpy() and strlcat(). The previous implementation used
6621 memcpy() and pointer arithmetic, which was error-prone. Closes
6622 ticket 31545. This is CID 1452819.
6623 - Split extrainfo_dump_to_string() into smaller functions. Closes
6625 - Use the ptrdiff_t type consistently for expressing variable
6626 offsets and pointer differences. Previously we incorrectly (but
6627 harmlessly) used int and sometimes off_t for these cases. Closes
6629 - Use the subsystems mechanism to manage the main event loop code.
6630 Closes ticket 30806.
6631 - Various simplifications and minor improvements to the circuit
6632 padding machines. Patch by Tobias Pulls. Closes tickets 31112
6635 o Documentation (hard-coded directories):
6636 - Improve the documentation for the DirAuthority and FallbackDir
6637 torrc options. Closes ticket 30955.
6639 o Documentation (tor.1 man page):
6640 - Fix typo in tor.1 man page: the option is "--help", not "-help".
6641 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
6644 Changes in version 0.4.1.5 - 2019-08-20
6645 This is the first stable release in the 0.4.1.x series. This series
6646 adds experimental circuit-level padding, authenticated SENDME cells to
6647 defend against certain attacks, and several performance improvements
6648 to save on CPU consumption. It fixes bugs in bootstrapping and v3
6649 onion services. It also includes numerous smaller features and
6650 bugfixes on earlier versions.
6652 Per our support policy, we will support the 0.4.1.x series for nine
6653 months, or until three months after the release of a stable 0.4.2.x:
6654 whichever is longer. If you need longer-term support, please stick
6655 with 0.3.5.x, which will we plan to support until Feb 2022.
6657 Below are the changes since 0.4.1.4-rc. For a complete list of changes
6658 since 0.4.0.5, see the ReleaseNotes file.
6660 o Directory authority changes:
6661 - The directory authority "dizum" has a new IP address. Closes
6664 o Minor features (circuit padding logging):
6665 - Demote noisy client-side warn logs about circuit padding to
6666 protocol warnings. Add additional log messages and circuit ID
6667 fields to help with bug 30992 and any other future issues.
6669 o Minor bugfixes (circuit padding negotiation):
6670 - Bump the circuit padding protocol version to explicitly signify
6671 that the HS setup machine support is finalized in 0.4.1.x-stable.
6672 This also means that 0.4.1.x-alpha clients will not negotiate
6673 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
6674 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
6675 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
6677 o Minor bugfixes (circuit padding):
6678 - Ignore non-padding cells on padding circuits. This addresses
6679 various warning messages from subsystems that were not expecting
6680 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
6682 o Minor bugfixes (clock skew detection):
6683 - Don't believe clock skew results from NETINFO cells that appear to
6684 arrive before we sent the VERSIONS cells they are responding to.
6685 Previously, we would accept them up to 3 minutes "in the past".
6686 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6688 o Minor bugfixes (compatibility, standards compliance):
6689 - Fix a bug that would invoke undefined behavior on certain
6690 operating systems when trying to asprintf() a string exactly
6691 INT_MAX bytes long. We don't believe this is exploitable, but it's
6692 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
6693 Found and fixed by Tobias Stoeckmann.
6695 o Minor bugfixes (compilation warning):
6696 - Fix a compilation warning on Windows about casting a function
6697 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6700 o Minor bugfixes (compilation):
6701 - Avoid using labs() on time_t, which can cause compilation warnings
6702 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6704 o Minor bugfixes (distribution):
6705 - Do not ship any temporary files found in the
6706 scripts/maint/practracker directory. Fixes bug 31311; bugfix
6709 o Testing (continuous integration):
6710 - In Travis, make stem log a controller trace to the console, and
6711 tail stem's tor log after failure. Closes ticket 30591.
6712 - In Travis, only run the stem tests that use a tor binary. Closes
6716 Changes in version 0.4.1.4-rc - 2019-07-25
6717 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
6718 updates to a new list of fallback directories. If no new bugs are
6719 found, the next release in the 0.4.1.x serious should be stable.
6721 o Major bugfixes (circuit build, guard):
6722 - When considering upgrading circuits from "waiting for guard" to
6723 "open", always ignore circuits that are marked for close. Otherwise,
6724 we can end up in the situation where a subsystem is notified that
6725 a closing circuit has just opened, leading to undesirable
6726 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
6728 o Minor features (continuous integration):
6729 - Our Travis configuration now uses Chutney to run some network
6730 integration tests automatically. Closes ticket 29280.
6732 o Minor features (fallback directory list):
6733 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6734 in December 2018 (of which ~122 were still functional), with a
6735 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6736 in June 2019. Closes ticket 28795.
6738 o Minor bugfixes (circuit padding):
6739 - On relays, properly check that a padding machine is absent before
6740 logging a warning about it being absent. Fixes bug 30649; bugfix
6742 - Add two NULL checks in unreachable places to silence Coverity (CID
6743 144729 and 1447291) and better future-proof ourselves. Fixes bug
6744 31024; bugfix on 0.4.1.1-alpha.
6746 o Minor bugfixes (crash on exit):
6747 - Avoid a set of possible code paths that could try to use freed
6748 memory in routerlist_free() while Tor was exiting. Fixes bug
6749 31003; bugfix on 0.1.2.2-alpha.
6751 o Minor bugfixes (logging):
6752 - Fix a conflict between the flag used for messaging-domain log
6753 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
6756 o Minor bugfixes (memory leaks):
6757 - Fix a trivial memory leak when parsing an invalid value from a
6758 download schedule in the configuration. Fixes bug 30894; bugfix
6761 o Code simplification and refactoring:
6762 - Remove some dead code from circpad_machine_remove_token() to fix
6763 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
6767 Changes in version 0.4.1.3-alpha - 2019-06-25
6768 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
6769 alpha, most of them from earlier release series.
6771 o Major bugfixes (Onion service reachability):
6772 - Properly clean up the introduction point map when circuits change
6773 purpose from onion service circuits to pathbias, measurement, or
6774 other circuit types. This should fix some service-side instances
6775 of introduction point failure. Fixes bug 29034; bugfix
6778 o Minor features (geoip):
6779 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
6780 Country database. Closes ticket 30852.
6782 o Minor features (logging):
6783 - Give a more useful assertion failure message if we think we have
6784 minherit() but we fail to make a region non-inheritable. Give a
6785 compile-time warning if our support for minherit() is incomplete.
6786 Closes ticket 30686.
6788 o Minor bugfixes (circuit isolation):
6789 - Fix a logic error that prevented the SessionGroup sub-option from
6790 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6792 o Minor bugfixes (continuous integration):
6793 - Allow the test-stem job to fail in Travis, because it sometimes
6794 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6795 - Skip test_rebind on macOS in Travis, because it is unreliable on
6796 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6797 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6798 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6800 o Minor bugfixes (directory authorities):
6801 - Stop crashing after parsing an unknown descriptor purpose
6802 annotation. We think this bug can only be triggered by modifying a
6803 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6805 o Minor bugfixes (pluggable transports):
6806 - When running as a bridge with pluggable transports, always publish
6807 pluggable transport information in our extrainfo descriptor, even
6808 if ExtraInfoStatistics is 0. This information is needed by
6809 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
6812 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
6813 Closes ticket 30630.
6816 Changes in version 0.4.1.2-alpha - 2019-06-06
6817 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
6818 previous alpha, and some much older. It also contains minor testing
6819 improvements, and an improvement to the security of our authenticated
6820 SENDME implementation.
6822 o Major bugfixes (bridges):
6823 - Consider our directory information to have changed when our list
6824 of bridges changes. Previously, Tor would not re-compute the
6825 status of its directory information when bridges changed, and
6826 therefore would not realize that it was no longer able to build
6827 circuits. Fixes part of bug 29875.
6828 - Do not count previously configured working bridges towards our
6829 total of working bridges. Previously, when Tor's list of bridges
6830 changed, it would think that the old bridges were still usable,
6831 and delay fetching router descriptors for the new ones. Fixes part
6832 of bug 29875; bugfix on 0.3.0.1-alpha.
6834 o Major bugfixes (flow control, SENDME):
6835 - Decrement the stream-level package window after packaging a cell.
6836 Previously, it was done inside a log_debug() call, meaning that if
6837 debug logs were not enabled, the decrement would never happen, and
6838 thus the window would be out of sync with the other end point.
6839 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
6841 o Major bugfixes (onion service reachability):
6842 - Properly clean up the introduction point map and associated state
6843 when circuits change purpose from onion service circuits to
6844 pathbias, measurement, or other circuit types. This may fix some
6845 instances of introduction point failure. Fixes bug 29034; bugfix
6848 o Minor features (authenticated SENDME):
6849 - Ensure that there is enough randomness on every circuit to prevent
6850 an attacker from successfully predicting the hashes they will need
6851 to include in authenticated SENDME cells. At a random interval, if
6852 we have not sent randomness already, we now leave some extra space
6853 at the end of a cell that we can fill with random bytes. Closes
6856 o Minor features (continuous integration):
6857 - When running coverage builds on Travis, we now set
6858 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
6861 o Minor features (maintenance):
6862 - Add a new "make autostyle" target that developers can use to apply
6863 all automatic Tor style and consistency conversions to the
6864 codebase. Closes ticket 30539.
6866 o Minor features (testing):
6867 - The circuitpadding tests now use a reproducible RNG implementation,
6868 so that if a test fails, we can learn why. Part of ticket 28878.
6869 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
6870 to set the RNG seed for tests that use a reproducible RNG. Part of
6872 - When running tests in coverage mode, take additional care to make
6873 our coverage deterministic, so that we can accurately track
6874 changes in code coverage. Closes ticket 30519.
6876 o Minor bugfixes (configuration, proxies):
6877 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6878 want authentication along with configured (but unused!)
6879 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6881 o Minor bugfixes (controller):
6882 - POSTDESCRIPTOR requests should work again. Previously, they were
6883 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
6885 - Repair the HSFETCH command so that it works again. Previously, it
6886 expected a body when it shouldn't have. Fixes bug 30646; bugfix
6889 o Minor bugfixes (developer tooling):
6890 - Fix pre-push hook to allow fixup and squash commits when pushing
6891 to non-upstream git remote. Fixes bug 30286; bugfix
6894 o Minor bugfixes (directory authority):
6895 - Move the "bandwidth-file-headers" line in directory authority
6896 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6899 o Minor bugfixes (NetBSD):
6900 - Fix usage of minherit() on NetBSD and other platforms that define
6901 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
6902 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
6904 o Minor bugfixes (out-of-memory handler):
6905 - When purging the DNS cache because of an out-of-memory condition,
6906 try purging just the older entries at first. Previously, we would
6907 always purge the whole thing. Fixes bug 29617; bugfix
6910 o Minor bugfixes (portability):
6911 - Avoid crashing in our tor_vasprintf() implementation on systems
6912 that define neither vasprintf() nor _vscprintf(). (This bug has
6913 been here long enough that we question whether people are running
6914 Tor on such systems, but we're applying the fix out of caution.)
6915 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6918 o Minor bugfixes (shutdown, libevent, memory safety):
6919 - Avoid use-after-free bugs when shutting down, by making sure that
6920 we shut down libevent only after shutting down all of its users.
6921 We believe these are harmless in practice, since they only occur
6922 on the shutdown path, and do not involve any attacker-controlled
6923 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
6925 o Minor bugfixes (static analysis):
6926 - Fix several spurious Coverity warnings about the unit tests, to
6927 lower our chances of missing real warnings in the future. Fixes
6928 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
6931 - Specify torrc paths (with empty files) when launching tor in
6932 integration tests; refrain from reading user and system torrcs.
6933 Resolves issue 29702.
6936 Changes in version 0.4.1.1-alpha - 2019-05-22
6937 This is the first alpha in the 0.4.1.x series. It introduces
6938 lightweight circuit padding to make some onion-service circuits harder
6939 to distinguish, includes a new "authenticated SENDME" feature to make
6940 certain denial-of-service attacks more difficult, and improves
6941 performance in several areas.
6943 o Major features (circuit padding):
6944 - Onion service clients now add padding cells at the start of their
6945 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
6946 look more like general purpose Exit traffic. The overhead for this
6947 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
6948 extra upstream cell and 10 downstream cells for INTRODUCE
6949 circuits. This feature is only enabled when also supported by the
6950 circuit's middle node. (Clients may specify fixed middle nodes
6951 with the MiddleNodes option, and may force-disable this feature
6952 with the CircuitPadding option.) Closes ticket 28634.
6954 o Major features (code organization):
6955 - Tor now includes a generic publish-subscribe message-passing
6956 subsystem that we can use to organize intermodule dependencies. We
6957 hope to use this to reduce dependencies between modules that don't
6958 need to be related, and to generally simplify our codebase. Closes
6961 o Major features (controller protocol):
6962 - Controller commands are now parsed using a generalized parsing
6963 subsystem. Previously, each controller command was responsible for
6964 parsing its own input, which led to strange inconsistencies.
6965 Closes ticket 30091.
6967 o Major features (flow control):
6968 - Implement authenticated SENDMEs as detailed in proposal 289. A
6969 SENDME cell now includes the digest of the traffic that it
6970 acknowledges, so that once an end point receives the SENDME, it
6971 can confirm the other side's knowledge of the previous cells that
6972 were sent, and prevent certain types of denial-of-service attacks.
6973 This behavior is controlled by two new consensus parameters: see
6974 the proposal for more details. Fixes ticket 26288.
6976 o Major features (performance):
6977 - Our node selection algorithm now excludes nodes in linear time.
6978 Previously, the algorithm was quadratic, which could slow down
6979 heavily used onion services. Closes ticket 30307.
6981 o Major features (performance, RNG):
6982 - Tor now constructs a fast secure pseudorandom number generator for
6983 each thread, to use when performance is critical. This PRNG is
6984 based on AES-CTR, using a buffering construction similar to
6985 libottery and the (newer) OpenBSD arc4random() code. It
6986 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
6987 small outputs. Although we believe it to be cryptographically
6988 strong, we are only using it when necessary for performance.
6989 Implements tickets 29023 and 29536.
6991 o Major bugfixes (onion service v3):
6992 - Fix an unreachable bug in which an introduction point could try to
6993 send an INTRODUCE_ACK with a status code that Trunnel would refuse
6994 to encode, leading the relay to assert(). We've consolidated the
6995 ABI values into Trunnel now. Fixes bug 30454; bugfix
6997 - Clients can now handle unknown status codes from INTRODUCE_ACK
6998 cells. (The NACK behavior will stay the same.) This will allow us
6999 to extend status codes in the future without breaking the normal
7000 client behavior. Fixes another part of bug 30454; bugfix
7003 o Minor features (circuit padding):
7004 - We now use a fast PRNG when scheduling circuit padding. Part of
7006 - Allow the padding machine designer to pick the edges of their
7007 histogram instead of trying to compute them automatically using an
7008 exponential formula. Resolves some undefined behavior in the case
7009 of small histograms and allows greater flexibility on machine
7010 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
7011 - Allow circuit padding machines to hold a circuit open until they
7012 are done padding it. Closes ticket 28780.
7014 o Minor features (compile-time modules):
7015 - Add a "--list-modules" command to print a list of which compile-
7016 time modules are enabled. Closes ticket 30452.
7018 o Minor features (continuous integration):
7019 - Remove sudo configuration lines from .travis.yml as they are no
7020 longer needed with current Travis build environment. Resolves
7022 - In Travis, show stem's tor log after failure. Closes ticket 30234.
7024 o Minor features (controller):
7025 - Add onion service version 3 support to the HSFETCH command.
7026 Previously, only version 2 onion services were supported. Closes
7027 ticket 25417. Patch by Neel Chauhan.
7029 o Minor features (debugging):
7030 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
7031 logging of additional information during assert failure. Now we
7032 can use format strings to include information for trouble
7033 shooting. Resolves ticket 29662.
7035 o Minor features (defense in depth):
7036 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
7037 case a bug causes them to be used later. Closes ticket 30176.
7038 Patch from Tobias Stoeckmann.
7039 - Tor now uses a cryptographically strong PRNG even for decisions
7040 that we do not believe are security-sensitive. Previously, for
7041 performance reasons, we had used a trivially predictable linear
7042 congruential generator algorithm for certain load-balancing and
7043 statistical sampling decisions. Now we use our fast RNG in those
7044 cases. Closes ticket 29542.
7046 o Minor features (developer tools):
7047 - Tor's "practracker" test script now checks for files and functions
7048 that seem too long and complicated. Existing overlong functions
7049 and files are accepted for now, but should eventually be
7050 refactored. Closes ticket 29221.
7051 - Add some scripts used for git maintenance to scripts/git. Closes
7053 - Call practracker from pre-push and pre-commit git hooks to let
7054 developers know if they made any code style violations. Closes
7056 - Add a script to check that each header has a well-formed and
7057 unique guard macro. Closes ticket 29756.
7059 o Minor features (geoip):
7060 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
7061 Country database. Closes ticket 30522.
7063 o Minor features (HTTP tunnel):
7064 - Return an informative web page when the HTTPTunnelPort is used as
7065 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
7067 o Minor features (IPv6, v3 onion services):
7068 - Make v3 onion services put IPv6 addresses in service descriptors.
7069 Before this change, service descriptors only contained IPv4
7070 addresses. Implements 26992.
7072 o Minor features (modularity):
7073 - The "--disable-module-dirauth" compile-time option now disables
7074 even more dirauth-only code. Closes ticket 30345.
7076 o Minor features (performance):
7077 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
7078 1.1.1 and later), since they tend to be faster than tiny-keccak.
7079 Closes ticket 28837.
7081 o Minor features (testing):
7082 - Tor's unit test code now contains helper functions to replace the
7083 PRNG with a deterministic or reproducible version for testing.
7084 Previously, various tests implemented this in various ways.
7085 Implements ticket 29732.
7086 - We now have a script, cov-test-determinism.sh, to identify places
7087 where our unit test coverage has become nondeterministic. Closes
7089 - Check that representative subsets of values of `int` and `unsigned
7090 int` can be represented by `void *`. Resolves issue 29537.
7092 o Minor bugfixes (bridge authority):
7093 - Bridge authorities now set bridges as running or non-running when
7094 about to dump their status to a file. Previously, they set bridges
7095 as running in response to a GETINFO command, but those shouldn't
7096 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
7097 Patch by Neel Chauhan.
7099 o Minor bugfixes (channel padding statistics):
7100 - Channel padding write totals and padding-enabled totals are now
7101 counted properly in relay extrainfo descriptors. Fixes bug 29231;
7102 bugfix on 0.3.1.1-alpha.
7104 o Minor bugfixes (circuit padding):
7105 - Add a "CircuitPadding" torrc option to disable circuit padding.
7106 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
7107 - Allow circuit padding machines to specify that they do not
7108 contribute much overhead, and provide consensus flags and torrc
7109 options to force clients to only use these low overhead machines.
7110 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
7111 - Provide a consensus parameter to fully disable circuit padding, to
7112 be used in emergency network overload situations. Fixes bug 30173;
7113 bugfix on 0.4.0.1-alpha.
7114 - The circuit padding subsystem will no longer schedule padding if
7115 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
7116 - Inspect a circuit-level cell queue before sending padding, to
7117 avoid sending padding while too much data is already queued. Fixes
7118 bug 29204; bugfix on 0.4.0.1-alpha.
7119 - Avoid calling monotime_absolute_usec() in circuit padding machines
7120 that do not use token removal or circuit RTT estimation. Fixes bug
7121 29085; bugfix on 0.4.0.1-alpha.
7123 o Minor bugfixes (compilation, unusual configurations):
7124 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
7125 due to missing declarations of abort(), and prevent other such
7126 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
7128 o Minor bugfixes (controller protocol):
7129 - Teach the controller parser to distinguish an object preceded by
7130 an argument list from one without. Previously, it couldn't
7131 distinguish an argument list from the first line of a multiline
7132 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
7134 o Minor bugfixes (directory authority, ipv6):
7135 - Directory authorities with IPv6 support now always mark themselves
7136 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
7137 Patch by Neel Chauhan.
7139 o Minor bugfixes (documentation):
7140 - Improve the documentation for using MapAddress with ".exit". Fixes
7141 bug 30109; bugfix on 0.1.0.1-rc.
7142 - Improve the monotonic time module and function documentation to
7143 explain what "monotonic" actually means, and document some results
7144 that have surprised people. Fixes bug 29640; bugfix
7146 - Use proper formatting when providing an example on quoting options
7147 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
7149 o Minor bugfixes (logging):
7150 - Do not log a warning when running with an OpenSSL version other
7151 than the one Tor was compiled with, if the two versions should be
7152 compatible. Previously, we would warn whenever the version was
7153 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
7154 - Warn operators when the MyFamily option is set but ContactInfo is
7155 missing, as the latter should be set too. Fixes bug 25110; bugfix
7158 o Minor bugfixes (memory leak):
7159 - Avoid a minor memory leak that could occur on relays when failing
7160 to create a "keys" directory. Fixes bug 30148; bugfix
7163 o Minor bugfixes (onion services):
7164 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
7165 implemenation) when failing to load an onion service client
7166 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
7167 - When refusing to launch a controller's HSFETCH request because of
7168 rate-limiting, respond to the controller with a new response,
7169 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
7170 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
7172 - When relaunching a circuit to a rendezvous service, mark the
7173 circuit as needing high-uptime routers as appropriate. Fixes bug
7174 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
7175 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
7176 (IPv6 support for v3 onion services is still incomplete: see
7177 ticket 23493 for details.) Fixes bug 23588; bugfix on
7178 0.3.2.1-alpha. Patch by Neel Chauhan.
7180 o Minor bugfixes (onion services, performance):
7181 - When building circuits to onion services, call tor_addr_parse()
7182 less often. Previously, we called tor_addr_parse() in
7183 circuit_is_acceptable() even if its output wasn't used. This
7184 change should improve performance when building circuits. Fixes
7185 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
7187 o Minor bugfixes (performance):
7188 - When checking whether a node is a bridge, use a fast check to make
7189 sure that its identity is set. Previously, we used a constant-time
7190 check, which is not necessary in this case. Fixes bug 30308;
7191 bugfix on 0.3.5.1-alpha.
7193 o Minor bugfixes (pluggable transports):
7194 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
7195 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
7197 o Minor bugfixes (probability distributions):
7198 - Refactor and improve parts of the probability distribution code
7199 that made Coverity complain. Fixes bug 29805; bugfix
7202 o Minor bugfixes (python):
7203 - Stop assuming that /usr/bin/python3 exists. For scripts that work
7204 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
7205 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
7207 o Minor bugfixes (relay):
7208 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
7209 is auto, act as if ExitRelay is 1. Previously, we would ignore
7210 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
7211 0.3.5.1-alpha. Patch by Neel Chauhan.
7213 o Minor bugfixes (stats):
7214 - When ExtraInfoStatistics is 0, stop including bandwidth usage
7215 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
7216 bridge statistics by country in extra-info documents. Fixes bug
7217 29018; bugfix on 0.2.4.1-alpha.
7219 o Minor bugfixes (testing):
7220 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
7221 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
7222 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
7223 - Fix some incorrect code in the v3 onion service unit tests. Fixes
7224 bug 29243; bugfix on 0.3.2.1-alpha.
7225 - In the "routerkeys/*" tests, check the return values of mkdir()
7226 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
7227 Found by Coverity as CID 1444254.
7228 - Split test_utils_general() into several smaller test functions.
7229 This makes it easier to perform resource deallocation on assert
7230 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
7231 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
7233 o Minor bugfixes (tor-resolve):
7234 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7235 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7236 actually matter, but it's good to fix them anyway.) Fixes bug
7237 30151; bugfix on 0.4.0.1-alpha.
7239 o Code simplification and refactoring:
7240 - Abstract out the low-level formatting of replies on the control
7241 port. Implements ticket 30007.
7242 - Add several assertions in an attempt to fix some Coverity
7243 warnings. Closes ticket 30149.
7244 - Introduce a connection_dir_buf_add() helper function that checks
7245 for compress_state of dir_connection_t and automatically writes a
7246 string to directory connection with or without compression.
7247 Resolves issue 28816.
7248 - Make the base32_decode() API return the number of bytes written,
7249 for consistency with base64_decode(). Closes ticket 28913.
7250 - Move most relay-only periodic events out of mainloop.c into the
7251 relay subsystem. Closes ticket 30414.
7252 - Refactor and encapsulate parts of the codebase that manipulate
7253 crypt_path_t objects. Resolves issue 30236.
7254 - Refactor several places in our code that Coverity incorrectly
7255 believed might have memory leaks. Closes ticket 30147.
7256 - Remove redundant return values in crypto_format, and the
7257 associated return value checks elsewhere in the code. Make the
7258 implementations in crypto_format consistent, and remove redundant
7259 code. Resolves ticket 29660.
7260 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7261 it is not a constant-time function. Closes ticket 30309.
7262 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7263 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7264 bugfix on 0.3.2.1-alpha.
7265 - Simplify v3 onion service link specifier handling code. Fixes bug
7266 23576; bugfix on 0.3.2.1-alpha.
7267 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7268 code. Resolves ticket 29108.
7269 - Split control.c into several submodules, in preparation for
7270 distributing its current responsibilities throughout the codebase.
7271 Closes ticket 29894.
7272 - Start to move responsibility for knowing about periodic events to
7273 the appropriate subsystems, so that the mainloop doesn't need to
7274 know all the periodic events in the rest of the codebase.
7275 Implements tickets 30293 and 30294.
7278 - Document how to find git commits and tags for bug fixes in
7279 CodingStandards.md. Update some file documentation. Closes
7283 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7284 directory. Resolves issue 29434.
7285 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7286 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7289 o Code simplification and refactoring (shell scripts):
7290 - Clean up many of our shell scripts to fix shellcheck warnings.
7291 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7292 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7293 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7294 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7295 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7296 nagios-check-tor-authority-cert (ticket 29071),
7297 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7298 (ticket 29060), test_key_expiration.sh (ticket 30002),
7299 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7302 o Testing (chutney):
7303 - In "make test-network-all", test IPv6-only v3 single onion
7304 services, using the chutney network single-onion-v23-ipv6-md.
7305 Closes ticket 27251.
7308 Changes in version 0.4.0.5 - 2019-05-02
7309 This is the first stable release in the 0.4.0.x series. It contains
7310 improvements for power management and bootstrap reporting, as well as
7311 preliminary backend support for circuit padding to prevent some kinds
7312 of traffic analysis. It also continues our work in refactoring Tor for
7313 long-term maintainability.
7315 Per our support policy, we will support the 0.4.0.x series for nine
7316 months, or until three months after the release of a stable 0.4.1.x:
7317 whichever is longer. If you need longer-term support, please stick
7318 with 0.3.5.x, which will we plan to support until Feb 2022.
7320 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7321 since 0.3.5.7, see the ReleaseNotes file.
7323 o Minor features (continuous integration):
7324 - In Travis, tell timelimit to use stem's backtrace signals, and
7325 launch python directly from timelimit, so python receives the
7326 signals from timelimit, rather than make. Closes ticket 30117.
7328 o Minor features (diagnostic):
7329 - Add more diagnostic log messages in an attempt to solve the issue
7330 of NUL bytes appearing in a microdescriptor cache. Related to
7333 o Minor features (testing):
7334 - Use the approx_time() function when setting the "Expires" header
7335 in directory replies, to make them more testable. Needed for
7338 o Minor bugfixes (rust):
7339 - Abort on panic in all build profiles, instead of potentially
7340 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7342 o Minor bugfixes (shellcheck):
7343 - Look for scripts in their correct locations during "make
7344 shellcheck". Previously we had looked in the wrong place during
7345 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7347 o Minor bugfixes (testing):
7348 - Check the time in the "Expires" header using approx_time(). Fixes
7349 bug 30001; bugfix on 0.4.0.4-rc.
7351 o Minor bugfixes (UI):
7352 - Lower log level of unlink() errors during bootstrap. Fixes bug
7353 29930; bugfix on 0.4.0.1-alpha.
7356 Changes in version 0.4.0.4-rc - 2019-04-11
7357 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7358 several bugs from earlier versions, including some that had affected
7359 stability, and one that prevented relays from working with NSS.
7361 o Major bugfixes (NSS, relay):
7362 - When running with NSS, disable TLS 1.2 ciphersuites that use
7363 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7364 these ciphersuites don't work -- which caused relays to fail to
7365 handshake with one another when these ciphersuites were enabled.
7366 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7368 o Minor features (bandwidth authority):
7369 - Make bandwidth authorities ignore relays that are reported in the
7370 bandwidth file with the flag "vote=0". This change allows us to
7371 report unmeasured relays for diagnostic reasons without including
7372 their bandwidth in the bandwidth authorities' vote. Closes
7374 - When a directory authority is using a bandwidth file to obtain the
7375 bandwidth values that will be included in the next vote, serve
7376 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7379 o Minor features (circuit padding):
7380 - Stop warning about undefined behavior in the probability
7381 distribution tests. Float division by zero may technically be
7382 undefined behavior in C, but it's well defined in IEEE 754.
7383 Partial backport of 29298. Closes ticket 29527; bugfix
7386 o Minor features (continuous integration):
7387 - On Travis Rust builds, cleanup Rust registry and refrain from
7388 caching the "target/" directory to speed up builds. Resolves
7391 o Minor features (dormant mode):
7392 - Add a DormantCanceledByStartup option to tell Tor that it should
7393 treat a startup event as cancelling any previous dormant state.
7394 Integrators should use this option with caution: it should only be
7395 used if Tor is being started because of something that the user
7396 did, and not if Tor is being automatically started in the
7397 background. Closes ticket 29357.
7399 o Minor features (geoip):
7400 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7401 Country database. Closes ticket 29992.
7403 o Minor features (NSS, diagnostic):
7404 - Try to log an error from NSS (if there is any) and a more useful
7405 description of our situation if we are using NSS and a call to
7406 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7408 o Minor bugfixes (security):
7409 - Fix a potential double free bug when reading huge bandwidth files.
7410 The issue is not exploitable in the current Tor network because
7411 the vulnerable code is only reached when directory authorities
7412 read bandwidth files, but bandwidth files come from a trusted
7413 source (usually the authorities themselves). Furthermore, the
7414 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7415 which are not used by any of the current authorities. Fixes bug
7416 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7418 - Verify in more places that we are not about to create a buffer
7419 with more than INT_MAX bytes, to avoid possible OOB access in the
7420 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7421 fixed by Tobias Stoeckmann.
7423 o Minor bugfix (continuous integration):
7424 - Reset coverage state on disk after Travis CI has finished. This
7425 should prevent future coverage merge errors from causing the test
7426 suite for the "process" subsystem to fail. The process subsystem
7427 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7429 - Terminate test-stem if it takes more than 9.5 minutes to run.
7430 (Travis terminates the job after 10 minutes of no output.)
7431 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7433 o Minor bugfixes (bootstrap reporting):
7434 - During bootstrap reporting, correctly distinguish pluggable
7435 transports from plain proxies. Fixes bug 28925; bugfix
7438 o Minor bugfixes (C correctness):
7439 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7440 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
7443 o Minor bugfixes (circuitpadding testing):
7444 - Minor tweaks to avoid rare test failures related to timers and
7445 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
7447 o Minor bugfixes (directory authorities):
7448 - Actually include the bandwidth-file-digest line in directory
7449 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
7451 o Minor bugfixes (logging):
7452 - On Windows, when errors cause us to reload a consensus from disk,
7453 tell the user that we are retrying at log level "notice".
7454 Previously we only logged this information at "info", which was
7455 confusing because the errors themselves were logged at "warning".
7456 Improves previous fix for 28614. Fixes bug 30004; bugfix
7459 o Minor bugfixes (pluggable transports):
7460 - Restore old behavior when it comes to discovering the path of a
7461 given Pluggable Transport executable file. A change in
7462 0.4.0.1-alpha had broken this behavior on paths containing a
7463 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
7465 o Minor bugfixes (testing):
7466 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
7467 recent test-network.sh to use new chutney features in CI. Fixes
7468 bug 29703; bugfix on 0.2.9.1-alpha.
7469 - Fix a test failure on Windows caused by an unexpected "BUG"
7470 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
7473 o Minor bugfixes (TLS protocol):
7474 - When classifying a client's selection of TLS ciphers, if the
7475 client ciphers are not yet available, do not cache the result.
7476 Previously, we had cached the unavailability of the cipher list
7477 and never looked again, which in turn led us to assume that the
7478 client only supported the ancient V1 link protocol. This, in turn,
7479 was causing Stem integration tests to stall in some cases. Fixes
7480 bug 30021; bugfix on 0.2.4.8-alpha.
7482 o Code simplification and refactoring:
7483 - Introduce a connection_dir_buf_add() helper function that detects
7484 whether compression is in use, and adds a string accordingly.
7485 Resolves issue 28816.
7486 - Refactor handle_get_next_bandwidth() to use
7487 connection_dir_buf_add(). Implements ticket 29897.
7490 - Clarify that Tor performs stream isolation among *Port listeners
7491 by default. Resolves issue 29121.
7494 Changes in version 0.4.0.3-alpha - 2019-03-22
7495 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
7496 bugs from earlier versions.
7498 o Minor features (address selection):
7499 - Treat the subnet 100.64.0.0/10 as public for some purposes;
7500 private for others. This subnet is the RFC 6598 (Carrier Grade
7501 NAT) IP range, and is deployed by many ISPs as an alternative to
7502 RFC 1918 that does not break existing internal networks. Tor now
7503 blocks SOCKS and control ports on these addresses and warns users
7504 if client ports or ExtORPorts are listening on a RFC 6598 address.
7505 Closes ticket 28525. Patch by Neel Chauhan.
7507 o Minor features (geoip):
7508 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
7509 Country database. Closes ticket 29666.
7511 o Minor bugfixes (circuitpadding):
7512 - Inspect the circuit-level cell queue before sending padding, to
7513 avoid sending padding when too much data is queued. Fixes bug
7514 29204; bugfix on 0.4.0.1-alpha.
7516 o Minor bugfixes (logging):
7517 - Correct a misleading error message when IPv4Only or IPv6Only is
7518 used but the resolved address can not be interpreted as an address
7519 of the specified IP version. Fixes bug 13221; bugfix on
7520 0.2.3.9-alpha. Patch from Kris Katterjohn.
7521 - Log the correct port number for listening sockets when "auto" is
7522 used to let Tor pick the port number. Previously, port 0 was
7523 logged instead of the actual port number. Fixes bug 29144; bugfix
7524 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7525 - Stop logging a BUG() warning when Tor is waiting for exit
7526 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
7528 o Minor bugfixes (memory management):
7529 - Refactor the shared random state's memory management so that it
7530 actually takes ownership of the shared random value pointers.
7531 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
7533 o Minor bugfixes (memory management, testing):
7534 - Stop leaking parts of the shared random state in the shared-random
7535 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
7537 o Minor bugfixes (pluggable transports):
7538 - Fix an assertion failure crash bug when a pluggable transport is
7539 terminated during the bootstrap phase. Fixes bug 29562; bugfix
7542 o Minor bugfixes (Rust, protover):
7543 - Add a missing "Padding" value to the Rust implementation of
7544 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
7546 o Minor bugfixes (single onion services):
7547 - Allow connections to single onion services to remain idle without
7548 being disconnected. Previously, relays acting as rendezvous points
7549 for single onion services were mistakenly closing idle rendezvous
7550 circuits after 60 seconds, thinking that they were unused
7551 directory-fetching circuits that had served their purpose. Fixes
7552 bug 29665; bugfix on 0.2.1.26.
7554 o Minor bugfixes (stats):
7555 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
7556 relay and bridge extra-info documents. Fixes bug 29017; bugfix
7559 o Minor bugfixes (testing):
7560 - Downgrade some LOG_ERR messages in the address/* tests to
7561 warnings. The LOG_ERR messages were occurring when we had no
7562 configured network. We were failing the unit tests, because we
7563 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7564 29530; bugfix on 0.3.5.8.
7565 - Fix our gcov wrapper script to look for object files at the
7566 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7567 - Decrease the false positive rate of stochastic probability
7568 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7570 o Minor bugfixes (Windows, CI):
7571 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7572 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7573 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7574 fast_finish, so failed jobs terminate the build immediately. Fixes
7575 bug 29601; bugfix on 0.3.5.4-alpha.
7578 Changes in version 0.3.5.8 - 2019-02-21
7579 Tor 0.3.5.8 backports several fixes from later releases, including fixes
7580 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
7583 It also includes a fix for a medium-severity security bug affecting Tor
7584 0.3.2.1-alpha and later. All Tor instances running an affected release
7585 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7587 o Major bugfixes (cell scheduler, KIST, security):
7588 - Make KIST consider the outbuf length when computing what it can
7589 put in the outbuf. Previously, KIST acted as though the outbuf
7590 were empty, which could lead to the outbuf becoming too full. It
7591 is possible that an attacker could exploit this bug to cause a Tor
7592 client or relay to run out of memory and crash. Fixes bug 29168;
7593 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7594 TROVE-2019-001 and CVE-2019-8955.
7596 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
7597 - Gracefully handle empty username/password fields in SOCKS5
7598 username/password auth message and allow SOCKS5 handshake to
7599 continue. Previously, we had rejected these handshakes, breaking
7600 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7602 o Minor features (compilation, backport from 0.4.0.2-alpha):
7603 - Compile correctly when OpenSSL is built with engine support
7604 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7605 Patches from "Mangix".
7607 o Minor features (geoip):
7608 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7609 Country database. Closes ticket 29478.
7611 o Minor features (testing, backport from 0.4.0.2-alpha):
7612 - Treat all unexpected ERR and BUG messages as test failures. Closes
7615 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
7616 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7617 connection waiting for a descriptor that we actually have in the
7618 cache. It turns out that this can actually happen, though it is
7619 rare. Now, tor will recover and retry the descriptor. Fixes bug
7620 28669; bugfix on 0.3.2.4-alpha.
7622 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
7623 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7624 IPv6 socket was bound using an address family of AF_INET instead
7625 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7628 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7629 - Update Cargo.lock file to match the version made by the latest
7630 version of Rust, so that "make distcheck" will pass again. Fixes
7631 bug 29244; bugfix on 0.3.3.4-alpha.
7633 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
7634 - Select guards even if the consensus has expired, as long as the
7635 consensus is still reasonably live. Fixes bug 24661; bugfix
7638 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
7639 - Compile correctly on OpenBSD; previously, we were missing some
7640 headers required in order to detect it properly. Fixes bug 28938;
7641 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7643 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
7644 - Describe the contents of the v3 onion service client authorization
7645 files correctly: They hold public keys, not private keys. Fixes
7646 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7648 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
7649 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7650 link protocol versions when logging incoming/outgoing connection
7651 counts. Tor no longer skips version 5, and we won't have to
7652 remember to update this function when new link protocol version is
7653 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7655 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
7656 - Log more information at "warning" level when unable to read a
7657 private key; log more information at "info" level when unable to
7658 read a public key. We had warnings here before, but they were lost
7659 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7661 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
7662 - The amount of total available physical memory is now determined
7663 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7664 when it is defined and a 64-bit variant is not available. Fixes
7665 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7667 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7668 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7669 than one private key for a hidden service. Fixes bug 29040; bugfix
7671 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7672 "debug" level. Tor used to log it as a warning, which caused very
7673 long log lines to appear for some users. Fixes bug 29135; bugfix
7675 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7676 as a warning. Instead, log it as a protocol warning, because there
7677 is nothing that relay operators can do to fix it. Fixes bug 29029;
7678 bugfix on 0.2.5.7-rc.
7680 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
7681 - Mark outdated dirservers when Tor only has a reasonably live
7682 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7684 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
7685 - Detect and suppress "bug" warnings from the util/time test on
7686 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7687 - Do not log an error-level message if we fail to find an IPv6
7688 network interface from the unit tests. Fixes bug 29160; bugfix
7691 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
7692 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7693 Some users took this phrasing to mean that the mentioned guard was
7694 under their control or responsibility, which it is not. Fixes bug
7695 28895; bugfix on Tor 0.3.0.1-alpha.
7698 Changes in version 0.3.4.11 - 2019-02-21
7699 Tor 0.3.4.11 is the third stable release in its series. It includes
7700 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
7701 later. All Tor instances running an affected release should upgrade to
7702 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7704 o Major bugfixes (cell scheduler, KIST, security):
7705 - Make KIST consider the outbuf length when computing what it can
7706 put in the outbuf. Previously, KIST acted as though the outbuf
7707 were empty, which could lead to the outbuf becoming too full. It
7708 is possible that an attacker could exploit this bug to cause a Tor
7709 client or relay to run out of memory and crash. Fixes bug 29168;
7710 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7711 TROVE-2019-001 and CVE-2019-8955.
7713 o Minor features (geoip):
7714 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7715 Country database. Closes ticket 29478.
7717 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7718 - Update Cargo.lock file to match the version made by the latest
7719 version of Rust, so that "make distcheck" will pass again. Fixes
7720 bug 29244; bugfix on 0.3.3.4-alpha.
7722 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7723 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7724 as a warning. Instead, log it as a protocol warning, because there
7725 is nothing that relay operators can do to fix it. Fixes bug 29029;
7726 bugfix on 0.2.5.7-rc.
7729 Changes in version 0.3.3.12 - 2019-02-21
7730 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
7731 0.3.2.1-alpha and later. All Tor instances running an affected release
7732 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7734 This release marks the end of support for the Tor 0.3.3.x series. We
7735 recommend that users switch to either the Tor 0.3.4 series (supported
7736 until at least 10 June 2019), or the Tor 0.3.5 series, which will
7737 receive long-term support until at least 1 Feb 2022.
7739 o Major bugfixes (cell scheduler, KIST, security):
7740 - Make KIST consider the outbuf length when computing what it can
7741 put in the outbuf. Previously, KIST acted as though the outbuf
7742 were empty, which could lead to the outbuf becoming too full. It
7743 is possible that an attacker could exploit this bug to cause a Tor
7744 client or relay to run out of memory and crash. Fixes bug 29168;
7745 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7746 TROVE-2019-001 and CVE-2019-8955.
7748 o Minor features (geoip):
7749 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7750 Country database. Closes ticket 29478.
7752 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7753 - Update Cargo.lock file to match the version made by the latest
7754 version of Rust, so that "make distcheck" will pass again. Fixes
7755 bug 29244; bugfix on 0.3.3.4-alpha.
7757 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7758 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7759 as a warning. Instead, log it as a protocol warning, because there
7760 is nothing that relay operators can do to fix it. Fixes bug 29029;
7761 bugfix on 0.2.5.7-rc.
7764 Changes in version 0.4.0.2-alpha - 2019-02-21
7765 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
7766 bugs from earlier versions, including several that had broken
7767 backward compatibility.
7769 It also includes a fix for a medium-severity security bug affecting Tor
7770 0.3.2.1-alpha and later. All Tor instances running an affected release
7771 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7773 o Major bugfixes (cell scheduler, KIST, security):
7774 - Make KIST consider the outbuf length when computing what it can
7775 put in the outbuf. Previously, KIST acted as though the outbuf
7776 were empty, which could lead to the outbuf becoming too full. It
7777 is possible that an attacker could exploit this bug to cause a Tor
7778 client or relay to run out of memory and crash. Fixes bug 29168;
7779 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7780 TROVE-2019-001 and CVE-2019-8955.
7782 o Major bugfixes (networking):
7783 - Gracefully handle empty username/password fields in SOCKS5
7784 username/password auth messsage and allow SOCKS5 handshake to
7785 continue. Previously, we had rejected these handshakes, breaking
7786 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7788 o Major bugfixes (windows, startup):
7789 - When reading a consensus file from disk, detect whether it was
7790 written in text mode, and re-read it in text mode if so. Always
7791 write consensus files in binary mode so that we can map them into
7792 memory later. Previously, we had written in text mode, which
7793 confused us when we tried to map the file on windows. Fixes bug
7794 28614; bugfix on 0.4.0.1-alpha.
7796 o Minor features (compilation):
7797 - Compile correctly when OpenSSL is built with engine support
7798 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7799 Patches from "Mangix".
7801 o Minor features (developer tooling):
7802 - Check that bugfix versions in changes files look like Tor versions
7803 from the versions spec. Warn when bugfixes claim to be on a future
7804 release. Closes ticket 27761.
7805 - Provide a git pre-commit hook that disallows committing if we have
7806 any failures in our code and changelog formatting checks. It is
7807 now available in scripts/maint/pre-commit.git-hook. Implements
7810 o Minor features (directory authority):
7811 - When a directory authority is using a bandwidth file to obtain
7812 bandwidth values, include the digest of that file in the vote.
7813 Closes ticket 26698.
7815 o Minor features (geoip):
7816 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7817 Country database. Closes ticket 29478.
7819 o Minor features (testing):
7820 - Treat all unexpected ERR and BUG messages as test failures. Closes
7823 o Minor bugfixes (build, compatibility, rust):
7824 - Update Cargo.lock file to match the version made by the latest
7825 version of Rust, so that "make distcheck" will pass again. Fixes
7826 bug 29244; bugfix on 0.3.3.4-alpha.
7828 o Minor bugfixes (compilation):
7829 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
7830 29169; bugfix on 0.4.0.1-alpha.
7831 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
7832 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
7834 o Minor bugfixes (documentation):
7835 - Describe the contents of the v3 onion service client authorization
7836 files correctly: They hold public keys, not private keys. Fixes
7837 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7839 o Minor bugfixes (linux seccomp sandbox):
7840 - Fix startup crash when experimental sandbox support is enabled.
7841 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
7843 o Minor bugfixes (logging):
7844 - Avoid logging that we are relaxing a circuit timeout when that
7845 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
7846 - Log more information at "warning" level when unable to read a
7847 private key; log more information at "info" level when unable to
7848 read a public key. We had warnings here before, but they were lost
7849 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7851 o Minor bugfixes (misc):
7852 - The amount of total available physical memory is now determined
7853 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7854 when it is defined and a 64-bit variant is not available. Fixes
7855 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7857 o Minor bugfixes (onion services):
7858 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7859 than one private key for a hidden service. Fixes bug 29040; bugfix
7861 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7862 "debug" level. Tor used to log it as a warning, which caused very
7863 long log lines to appear for some users. Fixes bug 29135; bugfix
7865 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7866 as a warning. Instead, log it as a protocol warning, because there
7867 is nothing that relay operators can do to fix it. Fixes bug 29029;
7868 bugfix on 0.2.5.7-rc.
7870 o Minor bugfixes (scheduler):
7871 - When re-adding channels to the pending list, check the correct
7872 channel's sched_heap_idx. This issue has had no effect in mainline
7873 Tor, but could have led to bugs down the road in improved versions
7874 of our circuit scheduling code. Fixes bug 29508; bugfix
7877 o Minor bugfixes (tests):
7878 - Fix intermittent failures on an adaptive padding test. Fixes one
7879 case of bug 29122; bugfix on 0.4.0.1-alpha.
7880 - Disable an unstable circuit-padding test that was failing
7881 intermittently because of an ill-defined small histogram. Such
7882 histograms will be allowed again after 29298 is implemented. Fixes
7883 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
7884 - Detect and suppress "bug" warnings from the util/time test on
7885 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7886 - Do not log an error-level message if we fail to find an IPv6
7887 network interface from the unit tests. Fixes bug 29160; bugfix
7891 - In the manpage entry describing MapAddress torrc setting, use
7892 example IP addresses from ranges specified for use in documentation
7893 by RFC 5737. Resolves issue 28623.
7896 - Remove the old check-tor script. Resolves issue 29072.
7899 Changes in version 0.4.0.1-alpha - 2019-01-18
7900 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
7901 introduces improved features for power and bandwidth conservation,
7902 more accurate reporting of bootstrap progress for user interfaces, and
7903 an experimental backend for an exciting new adaptive padding feature.
7904 There is also the usual assortment of bugfixes and minor features, all
7907 o Major features (battery management, client, dormant mode):
7908 - When Tor is running as a client, and it is unused for a long time,
7909 it can now enter a "dormant" state. When Tor is dormant, it avoids
7910 network and CPU activity until it is reawoken either by a user
7911 request or by a controller command. For more information, see the
7912 configuration options starting with "Dormant". Implements tickets
7914 - The client's memory of whether it is "dormant", and how long it
7915 has spent idle, persists across invocations. Implements
7917 - There is a DormantOnFirstStartup option that integrators can use
7918 if they expect that in many cases, Tor will be installed but
7921 o Major features (bootstrap reporting):
7922 - When reporting bootstrap progress, report the first connection
7923 uniformly, regardless of whether it's a connection for building
7924 application circuits. This allows finer-grained reporting of early
7925 progress than previously possible, with the improvements of ticket
7926 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
7927 - When reporting bootstrap progress, treat connecting to a proxy or
7928 pluggable transport as separate from having successfully used that
7929 proxy or pluggable transport to connect to a relay. Closes tickets
7932 o Major features (circuit padding):
7933 - Implement preliminary support for the circuit padding portion of
7934 Proposal 254. The implementation supports Adaptive Padding (aka
7935 WTF-PAD) state machines for use between experimental clients and
7936 relays. Support is also provided for APE-style state machines that
7937 use probability distributions instead of histograms to specify
7938 inter-packet delay. At the moment, Tor does not provide any
7939 padding state machines that are used in normal operation: for now,
7940 this feature exists solely for experimentation. Closes
7943 o Major features (refactoring):
7944 - Tor now uses an explicit list of its own subsystems when
7945 initializing and shutting down. Previously, these systems were
7946 managed implicitly in various places throughout the codebase.
7947 (There may still be some subsystems using the old system.) Closes
7950 o Minor features (bootstrap reporting):
7951 - When reporting bootstrap progress, stop distinguishing between
7952 situations where only internal paths are available and situations
7953 where external paths are available. Previously, Tor would often
7954 erroneously report that it had only internal paths. Closes
7957 o Minor features (continuous integration):
7958 - Log Python version during each Travis CI job. Resolves
7961 o Minor features (controller):
7962 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
7963 Implements ticket 28843.
7965 o Minor features (developer tooling):
7966 - Provide a git hook script to prevent "fixup!" and "squash!"
7967 commits from ending up in the master branch, as scripts/main/pre-
7968 push.git-hook. Closes ticket 27993.
7970 o Minor features (directory authority):
7971 - Directory authorities support a new consensus algorithm, under
7972 which the family lines in microdescriptors are encoded in a
7973 canonical form. This change makes family lines more compressible
7974 in transit, and on the client. Closes ticket 28266; implements
7977 o Minor features (directory authority, relay):
7978 - Authorities now vote on a "StaleDesc" flag to indicate that a
7979 relay's descriptor is so old that the relay should upload again
7980 soon. Relays treat this flag as a signal to upload a new
7981 descriptor. This flag will eventually let us remove the
7982 'published' date from routerstatus entries, and make our consensus
7983 diffs much smaller. Closes ticket 26770; implements proposal 293.
7985 o Minor features (fallback directory mirrors):
7986 - Update the fallback whitelist based on operator opt-ins and opt-
7987 outs. Closes ticket 24805, patch by Phoul.
7989 o Minor features (FreeBSD):
7990 - On FreeBSD-based systems, warn relay operators if the
7991 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
7992 Closes ticket 28518.
7994 o Minor features (HTTP standards compliance):
7995 - Stop sending the header "Content-type: application/octet-stream"
7996 along with transparently compressed documents: this confused
7997 browsers. Closes ticket 28100.
7999 o Minor features (IPv6):
8000 - We add an option ClientAutoIPv6ORPort, to make clients randomly
8001 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
8002 every time a node is loaded from a new consensus or bridge config.
8003 We expect that this option will enable clients to bootstrap more
8004 quickly without having to determine whether they support IPv4,
8005 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
8006 - When using addrs_in_same_network_family(), avoid choosing circuit
8007 paths that pass through the same IPv6 subnet more than once.
8008 Previously, we only checked IPv4 subnets. Closes ticket 24393.
8009 Patch by Neel Chauhan.
8011 o Minor features (log messages):
8012 - Improve log message in v3 onion services that could print out
8013 negative revision counters. Closes ticket 27707. Patch
8016 o Minor features (memory usage):
8017 - Save memory by storing microdescriptor family lists with a more
8018 compact representation. Closes ticket 27359.
8019 - Tor clients now use mmap() to read consensus files from disk, so
8020 that they no longer need keep the full text of a consensus in
8021 memory when parsing it or applying a diff. Closes ticket 27244.
8023 o Minor features (parsing):
8024 - Directory authorities now validate that router descriptors and
8025 ExtraInfo documents are in a valid subset of UTF-8, and reject
8026 them if they are not. Closes ticket 27367.
8028 o Minor features (performance):
8029 - Cache the results of summarize_protocol_flags(), so that we don't
8030 have to parse the same protocol-versions string over and over.
8031 This should save us a huge number of malloc calls on startup, and
8032 may reduce memory fragmentation with some allocators. Closes
8034 - Remove a needless memset() call from get_token_arguments, thereby
8035 speeding up the tokenization of directory objects by about 20%.
8036 Closes ticket 28852.
8037 - Replace parse_short_policy() with a faster implementation, to
8038 improve microdescriptor parsing time. Closes ticket 28853.
8039 - Speed up directory parsing a little by avoiding use of the non-
8040 inlined strcmp_len() function. Closes ticket 28856.
8041 - Speed up microdescriptor parsing by about 30%, to help improve
8042 startup time. Closes ticket 28839.
8044 o Minor features (pluggable transports):
8045 - Add support for emitting STATUS updates to Tor's control port from
8046 a pluggable transport process. Closes ticket 28846.
8047 - Add support for logging to Tor's logging subsystem from a
8048 pluggable transport process. Closes ticket 28180.
8050 o Minor features (process management):
8051 - Add a new process API for handling child processes. This new API
8052 allows Tor to have bi-directional communication with child
8053 processes on both Unix and Windows. Closes ticket 28179.
8054 - Use the subsystem manager to initialize and shut down the process
8055 module. Closes ticket 28847.
8057 o Minor features (relay):
8058 - When listing relay families, list them in canonical form including
8059 the relay's own identity, and try to give a more useful set of
8060 warnings. Part of ticket 28266 and proposal 298.
8062 o Minor features (required protocols):
8063 - Before exiting because of a missing required protocol, Tor will
8064 now check the publication time of the consensus, and not exit
8065 unless the consensus is newer than the Tor program's own release
8066 date. Previously, Tor would not check the consensus publication
8067 time, and so might exit because of a missing protocol that might
8068 no longer be required in a current consensus. Implements proposal
8069 297; closes ticket 27735.
8071 o Minor features (testing):
8072 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
8073 networks. Closes ticket 28840. Patch by Rob Jansen.
8075 o Minor bugfixes (client, clock skew):
8076 - Bootstrap successfully even when Tor's clock is behind the clocks
8077 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
8078 - Select guards even if the consensus has expired, as long as the
8079 consensus is still reasonably live. Fixes bug 24661; bugfix
8082 o Minor bugfixes (compilation):
8083 - Compile correctly on OpenBSD; previously, we were missing some
8084 headers required in order to detect it properly. Fixes bug 28938;
8085 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8087 o Minor bugfixes (directory clients):
8088 - Mark outdated dirservers when Tor only has a reasonably live
8089 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
8091 o Minor bugfixes (directory mirrors):
8092 - Even when a directory mirror's clock is behind the clocks on the
8093 authorities, we now allow the mirror to serve "future"
8094 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
8096 o Minor bugfixes (DNS):
8097 - Gracefully handle an empty or absent resolve.conf file by falling
8098 back to using "localhost" as a DNS server (and hoping it works).
8099 Previously, we would just stop running as an exit. Fixes bug
8100 21900; bugfix on 0.2.1.10-alpha.
8102 o Minor bugfixes (guards):
8103 - In count_acceptable_nodes(), the minimum number is now one bridge
8104 or guard node, and two non-guard nodes for a circuit. Previously,
8105 we had added up the sum of all nodes with a descriptor, but that
8106 could cause us to build failing circuits when we had either too
8107 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
8108 0.2.3.1-alpha. Patch by Neel Chauhan.
8110 o Minor bugfixes (IPv6):
8111 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
8112 IPv6 socket was bound using an address family of AF_INET instead
8113 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
8116 o Minor bugfixes (logging):
8117 - Rework rep_hist_log_link_protocol_counts() to iterate through all
8118 link protocol versions when logging incoming/outgoing connection
8119 counts. Tor no longer skips version 5, and we won't have to
8120 remember to update this function when new link protocol version is
8121 developed. Fixes bug 28920; bugfix on 0.2.6.10.
8123 o Minor bugfixes (networking):
8124 - Introduce additional checks into tor_addr_parse() to reject
8125 certain incorrect inputs that previously were not detected. Fixes
8126 bug 23082; bugfix on 0.2.0.10-alpha.
8128 o Minor bugfixes (onion service v3, client):
8129 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
8130 connection waiting for a descriptor that we actually have in the
8131 cache. It turns out that this can actually happen, though it is
8132 rare. Now, tor will recover and retry the descriptor. Fixes bug
8133 28669; bugfix on 0.3.2.4-alpha.
8135 o Minor bugfixes (periodic events):
8136 - Refrain from calling routerlist_remove_old_routers() from
8137 check_descriptor_callback(). Instead, create a new hourly periodic
8138 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
8140 o Minor bugfixes (pluggable transports):
8141 - Make sure that data is continously read from standard output and
8142 standard error pipes of a pluggable transport child-process, to
8143 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
8144 bugfix on 0.2.3.6-alpha.
8146 o Minor bugfixes (unit tests):
8147 - Instead of relying on hs_free_all() to clean up all onion service
8148 objects in test_build_descriptors(), we now deallocate them one by
8149 one. This lets Coverity know that we are not leaking memory there
8150 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
8152 o Minor bugfixes (usability):
8153 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
8154 Some users took this phrasing to mean that the mentioned guard was
8155 under their control or responsibility, which it is not. Fixes bug
8156 28895; bugfix on Tor 0.3.0.1-alpha.
8158 o Code simplification and refactoring:
8159 - Reimplement NETINFO cell parsing and generation to rely on
8160 trunnel-generated wire format handling code. Closes ticket 27325.
8161 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
8163 - Rework SOCKS wire format handling to rely on trunnel-generated
8164 parsing/generation code. Resolves ticket 27620.
8165 - Split out bootstrap progress reporting from control.c into a
8166 separate file. Part of ticket 27402.
8167 - The .may_include files that we use to describe our directory-by-
8168 directory dependency structure now describe a noncircular
8169 dependency graph over the directories that they cover. Our
8170 checkIncludes.py tool now enforces this noncircularity. Closes
8174 - Mention that you cannot add a new onion service if Tor is already
8175 running with Sandbox enabled. Closes ticket 28560.
8176 - Improve ControlPort documentation. Mention that it accepts
8177 address:port pairs, and can be used multiple times. Closes
8179 - Document the exact output of "tor --version". Closes ticket 28889.
8182 - Stop responding to the 'GETINFO status/version/num-concurring' and
8183 'GETINFO status/version/num-versioning' control port commands, as
8184 those were deprecated back in 0.2.0.30. Also stop listing them in
8185 output of 'GETINFO info/names'. Resolves ticket 28757.
8186 - The scripts used to generate and maintain the list of fallback
8187 directories have been extracted into a new "fallback-scripts"
8188 repository. Closes ticket 27914.
8191 - Run shellcheck for scripts in the in scripts/ directory. Closes
8193 - Add unit tests for tokenize_string() and get_next_token()
8194 functions. Resolves ticket 27625.
8196 o Code simplification and refactoring (onion service v3):
8197 - Consolidate the authorized client descriptor cookie computation
8198 code from client and service into one function. Closes
8201 o Code simplification and refactoring (shell scripts):
8202 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
8204 - Fix issues that shellcheck found in chutney-git-bisect.sh.
8205 Resolves ticket 28006.
8206 - Fix issues that shellcheck found in updateRustDependencies.sh.
8207 Resolves ticket 28012.
8208 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
8209 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
8210 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
8211 - Fix shellcheck warnings in scripts/test/coverage. Resolves
8215 Changes in version 0.3.3.11 - 2019-01-07
8216 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
8217 numerous fixes, including an important fix for anyone using OpenSSL
8218 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
8219 to this version, or to a later series.
8221 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
8222 We anticipate that this will be the last release of Tor 0.3.3, unless
8223 some major bug is before then. Some time between now and then, users
8224 should switch to either the Tor 0.3.4 series (supported until at least
8225 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
8226 support until at least 1 Feb 2022.
8228 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8229 - Fix our usage of named groups when running as a TLS 1.3 client in
8230 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8231 running as a relay, which caused clients to fail to negotiate TLS
8232 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8235 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8236 - Fix a use-after-free error that could be caused by passing Tor an
8237 impossible set of options that would fail during options_act().
8238 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8240 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8241 - Only run one online rust build in Travis, to reduce network
8242 errors. Skip offline rust builds on Travis for Linux gcc, because
8243 they're redundant. Implements ticket 27252.
8244 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8245 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8246 Linux with default settings, because all the non-default builds
8247 use gcc on Linux. Implements ticket 27252.
8249 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8250 - Use the Travis Homebrew addon to install packages on macOS during
8251 Travis CI. The package list is the same, but the Homebrew addon
8252 does not do a `brew update` by default. Implements ticket 27738.
8254 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8255 - Replace the 150 fallbacks originally introduced in Tor
8256 0.3.3.1-alpha in January 2018 (of which ~115 were still
8257 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8258 removed) generated in December 2018. Closes ticket 24803.
8260 o Minor features (geoip):
8261 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8262 Country database. Closes ticket 29012.
8264 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8265 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8266 key export function from handling long labels. When this bug is
8267 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8268 version of OpenSSL without this bug when it becomes available.
8269 Closes ticket 28973.
8271 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8272 - Update relay descriptor on bandwidth changes only when the uptime
8273 is smaller than 24h, in order to reduce the efficiency of guard
8274 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8276 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8277 - Avoid undefined behavior in an end-of-string check when parsing
8278 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8281 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8282 - Rewrite our assertion macros so that they no longer suppress the
8283 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8285 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8286 - Initialize a variable unconditionally in aes_new_cipher(), since
8287 some compilers cannot tell that we always initialize it before
8288 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8290 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8291 - Log additional info when we get a relay that shares an ed25519 ID
8292 with a different relay, instead making a BUG() warning. Fixes bug
8293 27800; bugfix on 0.3.2.1-alpha.
8295 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8296 - When a user requests a group-readable DataDirectory, give it to
8297 them. Previously, when the DataDirectory and the CacheDirectory
8298 were the same, the default setting (0) for
8299 CacheDirectoryGroupReadable would override the setting for
8300 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8303 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8304 - When the onion service directory can't be created or has the wrong
8305 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8308 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8309 - Close all SOCKS request (for the same .onion) if the newly fetched
8310 descriptor is unusable. Before that, we would close only the first
8311 one leaving the other hanging and let to time out by themselves.
8312 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8314 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8315 - Don't warn so loudly when Tor is unable to decode an onion
8316 descriptor. This can now happen as a normal use case if a client
8317 gets a descriptor with client authorization but the client is not
8318 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8320 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8321 - When deleting an ephemeral onion service (DEL_ONION), do not close
8322 any rendezvous circuits in order to let the existing client
8323 connections finish by themselves or closed by the application. The
8324 HS v2 is doing that already so now we have the same behavior for
8325 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8327 o Minor bugfixes (HTTP tunnel):
8328 - Fix a bug warning when closing an HTTP tunnel connection due to
8329 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8332 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8333 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8334 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8336 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8337 - Ensure circuitmux queues are empty before scheduling or sending
8338 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8340 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8341 - Reject protocol names containing bytes other than alphanumeric
8342 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8345 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8346 - Compute protover votes correctly in the rust version of the
8347 protover code. Previously, the protover rewrite in 24031 allowed
8348 repeated votes from the same voter for the same protocol version
8349 to be counted multiple times in protover_compute_vote(). Fixes bug
8350 27649; bugfix on 0.3.3.5-rc.
8351 - Reject protover names that contain invalid characters. Fixes bug
8352 27687; bugfix on 0.3.3.1-alpha.
8354 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8355 - protover_all_supported() would attempt to allocate up to 16GB on
8356 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8357 bugfix on 0.3.3.5-rc.
8359 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8360 - Fix a potential null dereference in protover_all_supported(). Add
8361 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8362 - Return a string that can be safely freed by C code, not one
8363 created by the rust allocator, in protover_all_supported(). Fixes
8364 bug 27740; bugfix on 0.3.3.1-alpha.
8365 - Fix an API mismatch in the rust implementation of
8366 protover_compute_vote(). This bug could have caused crashes on any
8367 directory authorities running Tor with Rust (which we do not yet
8368 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8370 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8371 - If a unit test running in a subprocess exits abnormally or with a
8372 nonzero status code, treat the test as having failed, even if the
8373 test reported success. Without this fix, memory leaks don't cause
8374 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8375 bugfix on 0.2.2.4-alpha.
8377 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8378 - Treat backtrace test failures as expected on BSD-derived systems
8379 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8380 (FreeBSD failures have been treated as expected since 18204 in
8381 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8383 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8384 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8385 bugfix on 0.3.0.1-alpha.
8388 Changes in version 0.3.4.10 - 2019-01-07
8389 Tor 0.3.4.9 is the second stable release in its series; it backports
8390 numerous fixes, including an important fix for relays, and for anyone
8391 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8394 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8395 2019. Some time between now and then, users should switch to the Tor
8396 0.3.5 series, which will receive long-term support until at least 1
8399 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8400 - Fix our usage of named groups when running as a TLS 1.3 client in
8401 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8402 running as a relay, which caused clients to fail to negotiate TLS
8403 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8406 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8407 - Always reactivate linked connections in the main loop so long as
8408 any linked connection has been active. Previously, connections
8409 serving directory information wouldn't get reactivated after the
8410 first chunk of data was sent (usually 32KB), which would prevent
8411 clients from bootstrapping. Fixes bug 28912; bugfix on
8412 0.3.4.1-alpha. Patch by "cypherpunks3".
8414 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8415 - Always show the configure and test logs, and upload them as build
8416 artifacts, when building for Windows using Appveyor CI.
8419 o Minor features (controller, backport from 0.3.5.1-alpha):
8420 - For purposes of CIRC_BW-based dropped cell detection, track half-
8421 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8422 bias check cells to arrive without counting it as dropped until
8423 either the END arrives, or the windows are empty. Closes
8426 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8427 - Replace the 150 fallbacks originally introduced in Tor
8428 0.3.3.1-alpha in January 2018 (of which ~115 were still
8429 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8430 removed) generated in December 2018. Closes ticket 24803.
8432 o Minor features (geoip):
8433 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8434 Country database. Closes ticket 28395.
8436 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8437 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8438 key export function from handling long labels. When this bug is
8439 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8440 version of OpenSSL without this bug when it becomes available.
8441 Closes ticket 28973.
8443 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8444 - Initialize a variable unconditionally in aes_new_cipher(), since
8445 some compilers cannot tell that we always initialize it before
8446 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8448 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
8449 - Avoid a logging a BUG() stacktrace when closing connection held
8450 open because the write side is rate limited but not the read side.
8451 Now, the connection read side is simply shut down until Tor is
8452 able to flush the connection and close it. Fixes bug 27750; bugfix
8455 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
8456 - Manually configure the zstd compiler options, when building using
8457 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8458 not come with a pkg-config file. Fixes bug 28454; bugfix
8460 - Stop using an external OpenSSL install, and stop installing MSYS2
8461 packages, when building using mingw on Appveyor Windows CI. Fixes
8462 bug 28399; bugfix on 0.3.4.1-alpha.
8464 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
8465 - Explicitly specify the path to the OpenSSL library and do not
8466 download OpenSSL from Pacman, but instead use the library that is
8467 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8469 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8470 - When a user requests a group-readable DataDirectory, give it to
8471 them. Previously, when the DataDirectory and the CacheDirectory
8472 were the same, the default setting (0) for
8473 CacheDirectoryGroupReadable would override the setting for
8474 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8477 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8478 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8479 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8481 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8482 - Don't warn so loudly when Tor is unable to decode an onion
8483 descriptor. This can now happen as a normal use case if a client
8484 gets a descriptor with client authorization but the client is not
8485 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8487 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8488 - When deleting an ephemeral onion service (DEL_ONION), do not close
8489 any rendezvous circuits in order to let the existing client
8490 connections finish by themselves or closed by the application. The
8491 HS v2 is doing that already so now we have the same behavior for
8492 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8494 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8495 - Update relay descriptor on bandwidth changes only when the uptime
8496 is smaller than 24h, in order to reduce the efficiency of guard
8497 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8499 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8500 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8501 bugfix on 0.3.0.1-alpha.
8504 Changes in version 0.3.5.7 - 2019-01-07
8505 Tor 0.3.5.7 is the first stable release in its series; it includes
8506 compilation and portability fixes, and a fix for a severe problem
8507 affecting directory caches.
8509 The Tor 0.3.5 series includes several new features and performance
8510 improvements, including client authorization for v3 onion services,
8511 cleanups to bootstrap reporting, support for improved bandwidth-
8512 measurement tools, experimental support for NSS in place of OpenSSL,
8513 and much more. It also begins a full reorganization of Tor's code
8514 layout, for improved modularity and maintainability in the future.
8515 Finally, there is the usual set of performance improvements and
8516 bugfixes that we try to do in every release series.
8518 There are a couple of changes in the 0.3.5 that may affect
8519 compatibility. First, the default version for newly created onion
8520 services is now v3. Use the HiddenServiceVersion option if you want to
8521 override this. Second, some log messages related to bootstrapping have
8522 changed; if you use stem, you may need to update to the latest version
8523 so it will recognize them.
8525 We have designated 0.3.5 as a "long-term support" (LTS) series: we
8526 will continue to patch major bugs in typical configurations of 0.3.5
8527 until at least 1 Feb 2022. (We do not plan to provide long-term
8528 support for embedding, Rust support, NSS support, running a directory
8529 authority, or unsupported platforms. For these, you will need to stick
8530 with the latest stable release.)
8532 Below are the changes since 0.3.5.6-rc. For a complete list of changes
8533 since 0.3.4.9, see the ReleaseNotes file.
8535 o Major bugfixes (relay, directory):
8536 - Always reactivate linked connections in the main loop so long as
8537 any linked connection has been active. Previously, connections
8538 serving directory information wouldn't get reactivated after the
8539 first chunk of data was sent (usually 32KB), which would prevent
8540 clients from bootstrapping. Fixes bug 28912; bugfix on
8541 0.3.4.1-alpha. Patch by "cypherpunks3".
8543 o Minor features (compilation):
8544 - When possible, place our warning flags in a separate file, to
8545 avoid flooding verbose build logs. Closes ticket 28924.
8547 o Minor features (geoip):
8548 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8549 Country database. Closes ticket 29012.
8551 o Minor features (OpenSSL bug workaround):
8552 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8553 key export function from handling long labels. When this bug is
8554 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8555 version of OpenSSL without this bug when it becomes available.
8556 Closes ticket 28973.
8558 o Minor features (performance):
8559 - Remove about 96% of the work from the function that we run at
8560 startup to test our curve25519_basepoint implementation. Since
8561 this function has yet to find an actual failure, we now only run
8562 it for 8 iterations instead of 200. Based on our profile
8563 information, this change should save around 8% of our startup time
8564 on typical desktops, and may have a similar effect on other
8565 platforms. Closes ticket 28838.
8566 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8567 every startup. Doing this wasted time and cycles, especially on
8568 low-powered devices. Closes ticket 28851.
8570 o Minor bugfixes (compilation):
8571 - Fix compilation for Android by adding a missing header to
8572 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8574 o Minor bugfixes (correctness):
8575 - Fix an unreached code path where we checked the value of
8576 "hostname" inside send_resolved_hostname_cell(). Previously, we
8577 used it before checking it; now we check it first. Fixes bug
8578 28879; bugfix on 0.1.2.7-alpha.
8580 o Minor bugfixes (testing):
8581 - Make sure that test_rebind.py actually obeys its timeout, even
8582 when it receives a large number of log messages. Fixes bug 28883;
8583 bugfix on 0.3.5.4-alpha.
8584 - Stop running stem's unit tests as part of "make test-stem", but
8585 continue to run stem's unit and online tests during "make test-
8586 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
8588 o Minor bugfixes (windows services):
8589 - Make Tor start correctly as an NT service again: previously it was
8590 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
8592 o Code simplification and refactoring:
8593 - When parsing a port configuration, make it more obvious to static
8594 analyzer tools that we always initialize the address. Closes
8598 Changes in version 0.3.5.6-rc - 2018-12-18
8599 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
8600 It is the first release candidate in the 0.3.5.x series; if no further
8601 huge bugs are found, our next release may be the stable 0.3.5.x.
8603 o Minor features (continuous integration, Windows):
8604 - Always show the configure and test logs, and upload them as build
8605 artifacts, when building for Windows using Appveyor CI.
8608 o Minor features (fallback directory list):
8609 - Replace the 150 fallbacks originally introduced in Tor
8610 0.3.3.1-alpha in January 2018 (of which ~115 were still
8611 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8612 removed) generated in December 2018. Closes ticket 24803.
8614 o Minor features (geoip):
8615 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
8616 Country database. Closes ticket 28744.
8618 o Minor bugfixes (compilation):
8619 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
8620 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
8622 o Minor bugfixes (continuous integration, Windows):
8623 - Explicitly specify the path to the OpenSSL library and do not
8624 download OpenSSL from Pacman, but instead use the library that is
8625 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8627 o Minor bugfixes (onion service v3):
8628 - When deleting an ephemeral onion service (DEL_ONION), do not close
8629 any rendezvous circuits in order to let the existing client
8630 connections finish by themselves or closed by the application. The
8631 HS v2 is doing that already so now we have the same behavior for
8632 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8634 o Minor bugfixes (restart-in-process, boostrap):
8635 - Add missing resets of bootstrap tracking state when shutting down
8636 (regression caused by ticket 27169). Fixes bug 28524; bugfix
8639 o Minor bugfixes (testing):
8640 - Use a separate DataDirectory for the test_rebind script.
8641 Previously, this script would run using the default DataDirectory,
8642 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
8643 Patch from Taylor R Campbell.
8644 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8645 bugfix on 0.3.0.1-alpha.
8647 o Minor bugfixes (Windows):
8648 - Correctly identify Windows 8.1, Windows 10, and Windows Server
8649 2008 and later from their NT versions. Fixes bug 28096; bugfix on
8650 0.2.2.34; reported by Keifer Bly.
8651 - On recent Windows versions, the GetVersionEx() function may report
8652 an earlier Windows version than the running OS. To avoid user
8653 confusion, add "[or later]" to Tor's version string on affected
8654 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
8656 - Remove Windows versions that were never supported by the
8657 GetVersionEx() function. Stop duplicating the latest Windows
8658 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
8659 reported by Keifer Bly.
8662 - Increase logging and tag all log entries with timestamps in
8663 test_rebind.py. Provides diagnostics for issue 28229.
8665 o Code simplification and refactoring (shared random, dirauth):
8666 - Change many tor_assert() to use BUG() instead. The idea is to not
8667 crash a dirauth but rather scream loudly with a stacktrace and let
8668 it continue run. The shared random subsystem is very resilient and
8669 if anything wrong happens with it, at worst a non coherent value
8670 will be put in the vote and discarded by the other authorities.
8671 Closes ticket 19566.
8673 o Documentation (onion services):
8674 - Document in the man page that changing ClientOnionAuthDir value or
8675 adding a new file in the directory will not work at runtime upon
8676 sending a HUP if Sandbox 1. Closes ticket 28128.
8677 - Note in the man page that the only real way to fully revoke an
8678 onion service v3 client authorization is by restarting the tor
8679 process. Closes ticket 28275.
8682 Changes in version 0.3.5.5-alpha - 2018-11-16
8683 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
8684 including several that we hope to backport to older release series in
8687 o Major bugfixes (OpenSSL, portability):
8688 - Fix our usage of named groups when running as a TLS 1.3 client in
8689 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8690 running as a relay, which caused clients to fail to negotiate TLS
8691 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8694 o Minor features (geoip):
8695 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8696 Country database. Closes ticket 28395.
8698 o Minor bugfixes (compilation):
8699 - Initialize a variable unconditionally in aes_new_cipher(), since
8700 some compilers cannot tell that we always initialize it before
8701 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8703 o Minor bugfixes (connection, relay):
8704 - Avoid a logging a BUG() stacktrace when closing connection held
8705 open because the write side is rate limited but not the read side.
8706 Now, the connection read side is simply shut down until Tor is
8707 able to flush the connection and close it. Fixes bug 27750; bugfix
8710 o Minor bugfixes (continuous integration, Windows):
8711 - Manually configure the zstd compiler options, when building using
8712 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8713 not come with a pkg-config file. Fixes bug 28454; bugfix
8715 - Stop using an external OpenSSL install, and stop installing MSYS2
8716 packages, when building using mingw on Appveyor Windows CI. Fixes
8717 bug 28399; bugfix on 0.3.4.1-alpha.
8719 o Minor bugfixes (documentation):
8720 - Make Doxygen work again after the code movement in the 0.3.5
8721 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
8723 o Minor bugfixes (Linux seccomp2 sandbox):
8724 - Permit the "shutdown()" system call, which is apparently used by
8725 OpenSSL under some circumstances. Fixes bug 28183; bugfix
8728 o Minor bugfixes (logging):
8729 - Stop talking about the Named flag in log messages. Clients have
8730 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
8733 o Minor bugfixes (memory leaks):
8734 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8735 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8737 o Minor bugfixes (onion services):
8738 - On an intro point for a version 3 onion service, stop closing
8739 introduction circuits on an NACK. This lets the client decide
8740 whether to reuse the circuit or discard it. Previously, we closed
8741 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
8742 0.3.2.1-alpha. Patch by Neel Chaunan.
8743 - When replacing a descriptor in the client cache, make sure to
8744 close all client introduction circuits for the old descriptor, so
8745 we don't end up with unusable leftover circuits. Fixes bug 27471;
8746 bugfix on 0.3.2.1-alpha.
8749 Changes in version 0.3.5.4-alpha - 2018-11-08
8750 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
8751 improves our continuous integration support. It continues our attempts
8752 to stabilize this alpha branch and build it into a foundation for an
8753 acceptable long-term-support release.
8755 o Major bugfixes (compilation, rust):
8756 - Rust tests can now build and run successfully with the
8757 --enable-fragile-hardening option enabled. Doing this currently
8758 requires the rust beta channel; it will be possible with stable
8759 rust once Rust version 1.31 is released. Patch from Alex Crichton.
8760 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
8762 o Major bugfixes (embedding, main loop):
8763 - When DisableNetwork becomes set, actually disable periodic events
8764 that are already enabled. (Previously, we would refrain from
8765 enabling new ones, but we would leave the old ones turned on.)
8766 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
8768 o Minor features (continuous integration):
8769 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
8771 - Add new CI job to Travis configuration to run stem-based
8772 integration tests. Closes ticket 27913.
8774 o Minor features (Windows, continuous integration):
8775 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
8776 Appveyor's CI. Closes ticket 28318.
8778 o Minor bugfixes (C correctness, also in 0.3.4.9):
8779 - Avoid undefined behavior in an end-of-string check when parsing
8780 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8783 o Minor bugfixes (compilation):
8784 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
8785 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8787 o Minor bugfixes (compilation, OpenSolaris):
8788 - Fix compilation on OpenSolaris and its descendants by adding a
8789 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
8792 o Minor bugfixes (configuration):
8793 - Refuse to start with relative file paths and RunAsDaemon set
8794 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
8797 o Minor bugfixes (directory authority, also in 0.3.4.9):
8798 - Log additional info when we get a relay that shares an ed25519 ID
8799 with a different relay, instead of a BUG() warning with a
8800 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
8802 o Minor bugfixes (onion service v3):
8803 - Build the service descriptor's signing key certificate before
8804 uploading, so we always have a fresh one: leaving no chances for
8805 it to expire service side. Fixes bug 27838; bugfix
8808 o Minor bugfixes (onion service v3, client authorization):
8809 - Fix an assert() when adding a client authorization for the first
8810 time and then sending a HUP signal to the service. Before that,
8811 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
8813 o Minor bugfixes (onion services):
8814 - Unless we have explicitly set HiddenServiceVersion, detect the
8815 onion service version and then look for invalid options.
8816 Previously, we did the reverse, but that broke existing configs
8817 which were pointed to a v2 service and had options like
8818 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
8819 0.3.5.1-alpha. Patch by Neel Chauhan.
8821 o Minor bugfixes (portability):
8822 - Make the OPE code (which is used for v3 onion services) run
8823 correctly on big-endian platforms. Fixes bug 28115; bugfix
8826 o Minor bugfixes (protover, rust):
8827 - Reject extra commas in version strings. Fixes bug 27197; bugfix
8830 o Minor bugfixes (relay shutdown, systemd):
8831 - Notify systemd of ShutdownWaitLength so it can be set to longer
8832 than systemd's TimeoutStopSec. In Tor's systemd service file, set
8833 TimeoutSec to 60 seconds to allow Tor some time to shut down.
8834 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
8836 o Minor bugfixes (rust, also in 0.3.4.9):
8837 - Fix a potential null dereference in protover_all_supported(). Add
8838 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8839 - Return a string that can be safely freed by C code, not one
8840 created by the rust allocator, in protover_all_supported(). Fixes
8841 bug 27740; bugfix on 0.3.3.1-alpha.
8843 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
8844 - Fix an API mismatch in the rust implementation of
8845 protover_compute_vote(). This bug could have caused crashes on any
8846 directory authorities running Tor with Rust (which we do not yet
8847 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8849 o Minor bugfixes (testing):
8850 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
8851 27968; bugfix on 0.3.5.1-alpha.
8853 o Minor bugfixes (testing, also in 0.3.4.9):
8854 - Treat backtrace test failures as expected on BSD-derived systems
8855 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8856 (FreeBSD failures have been treated as expected since 18204 in
8857 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8859 o Documentation (onion service manpage):
8860 - Improve HSv3 client authorization by making some options more
8861 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
8864 Changes in version 0.3.4.9 - 2018-11-02
8865 Tor 0.3.4.9 is the second stable release in its series; it backports
8866 numerous fixes, including a fix for a bandwidth management bug that
8867 was causing memory exhaustion on relays. Anyone running an earlier
8868 version of Tor 0.3.4.9 should upgrade.
8870 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
8871 - Fix compilation on ARM (and other less-used CPUs) when compiling
8872 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8874 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
8875 - Make sure Tor bootstraps and works properly if only the
8876 ControlPort is set. Prior to this fix, Tor would only bootstrap
8877 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8878 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8880 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
8881 - When our write bandwidth limit is exhausted, stop writing on the
8882 connection. Previously, we had a typo in the code that would make
8883 us stop reading instead, leading to relay connections being stuck
8884 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8887 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8888 - Fix a use-after-free error that could be caused by passing Tor an
8889 impossible set of options that would fail during options_act().
8890 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8892 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8893 - Don't do a distcheck with --disable-module-dirauth in Travis.
8894 Implements ticket 27252.
8895 - Only run one online rust build in Travis, to reduce network
8896 errors. Skip offline rust builds on Travis for Linux gcc, because
8897 they're redundant. Implements ticket 27252.
8898 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8899 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8900 Linux with default settings, because all the non-default builds
8901 use gcc on Linux. Implements ticket 27252.
8903 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8904 - Use the Travis Homebrew addon to install packages on macOS during
8905 Travis CI. The package list is the same, but the Homebrew addon
8906 does not do a `brew update` by default. Implements ticket 27738.
8908 o Minor features (geoip):
8909 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8910 Country database. Closes ticket 27991.
8912 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
8913 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8914 difference algorithm for 32-bit Apple platforms. Previously, it
8915 would overflow when calculating the difference between two times
8916 more than 47 days apart. Fixes part of bug 27139; bugfix
8918 - Improve the precision of our 32-bit millisecond difference
8919 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8920 bugfix on 0.3.4.1-alpha.
8921 - Relax the tolerance on the mainloop/update_time_jumps test when
8922 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8925 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
8926 - Avoid undefined behavior in an end-of-string check when parsing
8927 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8930 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
8931 - Only install the necessary mingw packages during our appveyor
8932 builds. This change makes the build a little faster, and prevents
8933 a conflict with a preinstalled mingw openssl that appveyor now
8934 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
8936 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8937 - Rewrite our assertion macros so that they no longer suppress the
8938 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8940 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
8941 - Stop reinstalling identical packages in our Windows CI. Fixes bug
8942 27464; bugfix on 0.3.4.1-alpha.
8944 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
8945 - Log additional info when we get a relay that shares an ed25519 ID
8946 with a different relay, instead making a BUG() warning. Fixes bug
8947 27800; bugfix on 0.3.2.1-alpha.
8949 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
8950 - Avoid a double-close when shutting down a stalled directory
8951 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8953 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
8954 - Fix a bug warning when closing an HTTP tunnel connection due to an
8955 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8958 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8959 - Ensure circuitmux queues are empty before scheduling or sending
8960 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8962 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8963 - When the onion service directory can't be created or has the wrong
8964 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8967 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8968 - Close all SOCKS request (for the same .onion) if the newly fetched
8969 descriptor is unusable. Before that, we would close only the first
8970 one leaving the other hanging and let to time out by themselves.
8971 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8973 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8974 - When selecting a v3 rendezvous point, don't only look at the
8975 protover, but also check whether the curve25519 onion key is
8976 present. This way we avoid picking a relay that supports the v3
8977 rendezvous but for which we don't have the microdescriptor. Fixes
8978 bug 27797; bugfix on 0.3.2.1-alpha.
8980 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8981 - Reject protocol names containing bytes other than alphanumeric
8982 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8985 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8986 - Compute protover votes correctly in the rust version of the
8987 protover code. Previously, the protover rewrite in 24031 allowed
8988 repeated votes from the same voter for the same protocol version
8989 to be counted multiple times in protover_compute_vote(). Fixes bug
8990 27649; bugfix on 0.3.3.5-rc.
8991 - Reject protover names that contain invalid characters. Fixes bug
8992 27687; bugfix on 0.3.3.1-alpha.
8994 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8995 - protover_all_supported() would attempt to allocate up to 16GB on
8996 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8997 bugfix on 0.3.3.5-rc.
8999 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
9000 - Fix an API mismatch in the rust implementation of
9001 protover_compute_vote(). This bug could have caused crashes on any
9002 directory authorities running Tor with Rust (which we do not yet
9003 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
9005 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
9006 - Fix a potential null dereference in protover_all_supported(). Add
9007 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
9008 - Return a string that can be safely freed by C code, not one
9009 created by the rust allocator, in protover_all_supported(). Fixes
9010 bug 27740; bugfix on 0.3.3.1-alpha.
9012 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
9013 - If a unit test running in a subprocess exits abnormally or with a
9014 nonzero status code, treat the test as having failed, even if the
9015 test reported success. Without this fix, memory leaks don't cause
9016 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9017 bugfix on 0.2.2.4-alpha.
9019 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
9020 - Make the hs_service tests use the same time source when creating
9021 the introduction point and when testing it. Now tests work better
9022 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9025 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
9026 - Treat backtrace test failures as expected on BSD-derived systems
9027 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
9028 (FreeBSD failures have been treated as expected since 18204 in
9029 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
9032 Changes in version 0.3.5.3-alpha - 2018-10-17
9033 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
9034 versions. One important fix for relays addresses a problem with rate-
9035 limiting code from back in 0.3.4.x: If the fix works out, we'll be
9036 backporting it soon. This release is still an alpha, but we hope it's
9037 getting closer and closer to stability.
9039 o Major features (onion services):
9040 - Version 3 onion services can now use the per-service
9041 HiddenServiceExportCircuitID option to differentiate client
9042 circuits. It communicates with the service by using the HAProxy
9043 protocol to assign virtual IP addresses to inbound client
9044 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
9046 o Major bugfixes (compilation):
9047 - Fix compilation on ARM (and other less-used CPUs) when compiling
9048 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
9050 o Major bugfixes (initialization, crash):
9051 - Fix an assertion crash that would stop Tor from starting up if it
9052 tried to activate a periodic event too early. Fixes bug 27861;
9053 bugfix on 0.3.5.1-alpha.
9055 o Major bugfixes (mainloop, bootstrap):
9056 - Make sure Tor bootstraps and works properly if only the
9057 ControlPort is set. Prior to this fix, Tor would only bootstrap
9058 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
9059 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
9061 o Major bugfixes (relay):
9062 - When our write bandwidth limit is exhausted, stop writing on the
9063 connection. Previously, we had a typo in the code that would make
9064 us stop reading instead, leading to relay connections being stuck
9065 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
9068 o Minor features (continuous integration):
9069 - Use the Travis Homebrew addon to install packages on macOS during
9070 Travis CI. The package list is the same, but the Homebrew addon
9071 does not do a `brew update` by default. Implements ticket 27738.
9072 - Report what program produced the mysterious core file that we
9073 occasionally see on Travis CI during make distcheck. Closes
9076 o Minor features (geoip):
9077 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
9078 Country database. Closes ticket 27991.
9080 o Minor bugfixes (code safety):
9081 - Rewrite our assertion macros so that they no longer suppress the
9082 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
9085 o Minor bugfixes (compilation):
9086 - Compile the ed25519-donna code with a correct declaration of
9087 crypto_strongest_rand(). Previously, we built it with one type,
9088 but linked it against another in the unit tests, which caused
9089 compilation failures with LTO enabled. This could have caused
9090 other undefined behavior in the tests. Fixes bug 27728; bugfix
9093 o Minor bugfixes (compilation, netbsd):
9094 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
9097 o Minor bugfixes (continuous integration, appveyor):
9098 - Install only the necessary mingw packages during our appveyor
9099 builds. This change makes the build a little faster, and prevents
9100 a conflict with a preinstalled mingw openssl that appveyor now
9101 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
9103 o Minor bugfixes (directory permissions):
9104 - When a user requests a group-readable DataDirectory, give it to
9105 them. Previously, when the DataDirectory and the CacheDirectory
9106 were the same, the default setting (0) for
9107 CacheDirectoryGroupReadable would override the setting for
9108 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
9111 o Minor bugfixes (memory leaks):
9112 - Fix a small memory leak when calling Tor with --dump-config. Fixes
9113 bug 27893; bugfix on 0.3.2.1-alpha.
9115 o Minor bugfixes (networking):
9116 - In retry_listeners_ports(), make sure that we're removing a member
9117 of old_conns smartlist at most once. Fixes bug 27808; bugfix
9119 - Refrain from attempting socket rebinding when old and new
9120 listeners are in different address families. Fixes bug 27928;
9121 bugfix on 0.3.5.1-alpha.
9123 o Minor bugfixes (onion service v3):
9124 - Stop dumping a stack trace when trying to connect to an intro
9125 point without having a descriptor for it. Fixes bug 27774; bugfix
9127 - Don't warn so loudly when Tor is unable to decode an onion
9128 descriptor. This can now happen as a normal use case if a client
9129 gets a descriptor with client authorization but the client is not
9130 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
9131 - When selecting a v3 rendezvous point, don't only look at the
9132 protover, but also check whether the curve25519 onion key is
9133 present. This way we avoid picking a relay that supports the v3
9134 rendezvous but for which we don't have the microdescriptor. Fixes
9135 bug 27797; bugfix on 0.3.2.1-alpha.
9137 o Minor bugfixes (protover):
9138 - Reject protocol names containing bytes other than alphanumeric
9139 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
9142 o Minor bugfixes (testing):
9143 - Make the hs_service tests use the same time source when creating
9144 the introduction point and when testing it. Now tests work better
9145 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
9147 - In test_rebind.py, check if the Python version is in the supported
9148 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
9150 o Code simplification and refactoring:
9151 - Divide more large Tor source files -- especially ones that span
9152 multiple areas of functionality -- into smaller parts, including
9153 onion.c and main.c. Closes ticket 26747.
9154 - Divide the "routerparse.c" module into separate modules for each
9155 group of parsed objects. Closes ticket 27924.
9156 - Move protover_rust.c to the same place protover.c was moved to.
9157 Closes ticket 27814.
9158 - Split directory.c into separate pieces for client, server, and
9159 common functionality. Closes ticket 26744.
9160 - Split the non-statistics-related parts from the rephist.c and
9161 geoip.c modules. Closes ticket 27892.
9162 - Split the router.c file into relay-only and shared components, to
9163 help with future modularization. Closes ticket 27864.
9166 - In the tor-resolve(1) manpage, fix the reference to socks-
9167 extensions.txt by adding a web URL. Resolves ticket 27853.
9168 - Mention that we require Python to be 2.7 or newer for some
9169 integration tests that we ship with Tor. Resolves ticket 27677.
9172 Changes in version 0.3.5.2-alpha - 2018-09-21
9173 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
9174 that made Tor think it had run out of sockets. Anybody running a relay
9175 or an onion service on 0.3.5.1-alpha should upgrade.
9177 o Major bugfixes (relay bandwidth statistics):
9178 - When we close relayed circuits, report the data in the circuit
9179 queues as being written in our relay bandwidth stats. This
9180 mitigates guard discovery and other attacks that close circuits
9181 for the explicit purpose of noticing this discrepancy in
9182 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
9184 o Major bugfixes (socket accounting):
9185 - In our socket accounting code, count a socket as closed even when
9186 it is closed indirectly by the TLS layer. Previously, we would
9187 count these sockets as still in use, and incorrectly believe that
9188 we had run out of sockets. Fixes bug 27795; bugfix
9191 o Minor bugfixes (32-bit OSX and iOS, timing):
9192 - Fix an integer overflow bug in our optimized 32-bit millisecond-
9193 difference algorithm for 32-bit Apple platforms. Previously, it
9194 would overflow when calculating the difference between two times
9195 more than 47 days apart. Fixes part of bug 27139; bugfix
9197 - Improve the precision of our 32-bit millisecond difference
9198 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
9199 bugfix on 0.3.4.1-alpha.
9200 - Relax the tolerance on the mainloop/update_time_jumps test when
9201 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
9204 o Minor bugfixes (onion service v3):
9205 - Close all SOCKS request (for the same .onion) if the newly fetched
9206 descriptor is unusable. Before that, we would close only the first
9207 one leaving the other hanging and let to time out by themselves.
9208 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
9210 o Minor bugfixes (memory leak):
9211 - Fix an unlikely memory leak when trying to read a private key from
9212 a ridiculously large file. Fixes bug 27764; bugfix on
9213 0.3.5.1-alpha. This is CID 1439488.
9215 o Minor bugfixes (NSS):
9216 - Correctly detect failure to open a dummy TCP socket when stealing
9217 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
9220 o Minor bugfixes (rust):
9221 - protover_all_supported() would attempt to allocate up to 16GB on
9222 some inputs, leading to a potential memory DoS. Fixes bug 27206;
9223 bugfix on 0.3.3.5-rc.
9225 o Minor bugfixes (testing):
9226 - Revise the "conditionvar_timeout" test so that it succeeds even on
9227 heavily loaded systems where the test threads are not scheduled
9228 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
9230 o Code simplification and refactoring:
9231 - Divide the routerlist.c and dirserv.c modules into smaller parts.
9232 Closes ticket 27799.
9235 Changes in version 0.3.5.1-alpha - 2018-09-18
9236 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9237 client authorization for modern (v3) onion services, improves
9238 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9239 support for NSS in place of OpenSSL, and much more.
9241 o Major features (onion services, UI change):
9242 - For a newly created onion service, the default version is now 3.
9243 Tor still supports existing version 2 services, but the operator
9244 now needs to set "HiddenServiceVersion 2" in order to create a new
9245 version 2 service. For existing services, Tor now learns the
9246 version by reading the key file. Closes ticket 27215.
9248 o Major features (relay, UI change):
9249 - Relays no longer run as exits by default. If the "ExitRelay"
9250 option is auto (or unset), and no exit policy is specified with
9251 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9252 Previously in this case, we allowed exit traffic and logged a
9253 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9254 - Tor now validates that the ContactInfo config option is valid UTF-
9255 8 when parsing torrc. Closes ticket 27428.
9257 o Major features (bootstrap):
9258 - Don't report directory progress until after a connection to a
9259 relay or bridge has succeeded. Previously, we'd report 80%
9260 progress based on cached directory information when we couldn't
9261 even connect to the network. Closes ticket 27169.
9263 o Major features (new code layout):
9264 - Nearly all of Tor's source code has been moved around into more
9265 logical places. The "common" directory is now divided into a set
9266 of libraries in "lib", and files in the "or" directory have been
9267 split into "core" (logic absolutely needed for onion routing),
9268 "feature" (independent modules in Tor), and "app" (to configure
9269 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9270 more information. Closes ticket 26481.
9272 This refactoring is not complete: although the libraries have been
9273 refactored to be acyclic, the main body of Tor is still too
9274 interconnected. We will attempt to improve this in the future.
9276 o Major features (onion services v3):
9277 - Implement onion service client authorization at the descriptor
9278 level: only authorized clients can decrypt a service's descriptor
9279 to find out how to contact it. A new torrc option was added to
9280 control this client side: ClientOnionAuthDir <path>. On the
9281 service side, if the "authorized_clients/" directory exists in the
9282 onion service directory path, client configurations are read from
9283 the files within. See the manpage for more details. Closes ticket
9284 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9285 - Improve revision counter generation in next-gen onion services.
9286 Onion services can now scale by hosting multiple instances on
9287 different hosts without synchronization between them, which was
9288 previously impossible because descriptors would get rejected by
9289 HSDirs. Addresses ticket 25552.
9291 o Major features (portability, cryptography, experimental, TLS):
9292 - Tor now has the option to compile with the NSS library instead of
9293 OpenSSL. This feature is experimental, and we expect that bugs may
9294 remain. It is mainly intended for environments where Tor's
9295 performance is not CPU-bound, and where NSS is already known to be
9296 installed. To try it out, configure Tor with the --enable-nss
9297 flag. Closes tickets 26631, 26815, and 26816.
9299 If you are experimenting with this option and using an old cached
9300 consensus, Tor may fail to start. To solve this, delete your
9301 "cached-consensus" and "cached-microdesc-consensus" files,
9302 (if present), and restart Tor.
9304 o Major bugfixes (directory authority):
9305 - Actually check that the address we get from DirAuthority
9306 configuration line is valid IPv4. Explicitly disallow DirAuthority
9307 address to be a DNS hostname. Fixes bug 26488; bugfix
9310 o Major bugfixes (restart-in-process):
9311 - Fix a use-after-free error that could be caused by passing Tor an
9312 impossible set of options that would fail during options_act().
9313 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9315 o Minor features (admin tools):
9316 - Add a new --key-expiration option to print the expiration date of
9317 the signing cert in an ed25519_signing_cert file. Resolves
9320 o Minor features (build):
9321 - If you pass the "--enable-pic" option to configure, Tor will try
9322 to tell the compiler to build position-independent code suitable
9323 to link into a dynamic library. (The default remains -fPIE, for
9324 code suitable for a relocatable executable.) Closes ticket 23846.
9326 o Minor features (code correctness, testing):
9327 - Tor's build process now includes a "check-includes" make target to
9328 verify that no module of Tor relies on any headers from a higher-
9329 level module. We hope to use this feature over time to help
9330 refactor our codebase. Closes ticket 26447.
9332 o Minor features (code layout):
9333 - We have a new "lowest-level" error-handling API for use by code
9334 invoked from within the logging module. With this interface, the
9335 logging code is no longer at risk of calling into itself if a
9336 failure occurs while it is trying to log something. Closes
9339 o Minor features (compilation):
9340 - Tor's configure script now supports a --with-malloc= option to
9341 select your malloc implementation. Supported options are
9342 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9343 default). Addresses part of ticket 20424. Based on a patch from
9346 o Minor features (config):
9347 - The "auto" keyword in torrc is now case-insensitive. Closes
9350 o Minor features (continuous integration):
9351 - Don't do a distcheck with --disable-module-dirauth in Travis.
9352 Implements ticket 27252.
9353 - Install libcap-dev and libseccomp2-dev so these optional
9354 dependencies get tested on Travis CI. Closes ticket 26560.
9355 - Only run one online rust build in Travis, to reduce network
9356 errors. Skip offline rust builds on Travis for Linux gcc, because
9357 they're redundant. Implements ticket 27252.
9358 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9359 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9360 Linux with default settings, because all the non-default builds
9361 use gcc on Linux. Implements ticket 27252.
9363 o Minor features (controller):
9364 - Emit CIRC_BW events as soon as we detect that we processed an
9365 invalid or otherwise dropped cell on a circuit. This allows
9366 vanguards and other controllers to react more quickly to dropped
9367 cells. Closes ticket 27678.
9368 - For purposes of CIRC_BW-based dropped cell detection, track half-
9369 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9370 bias check cells to arrive without counting it as dropped until
9371 either the END arrives, or the windows are empty. Closes
9373 - Implement a 'GETINFO md/all' controller command to enable getting
9374 all known microdescriptors. Closes ticket 8323.
9375 - The GETINFO command now support an "uptime" argument, to return
9376 Tor's uptime in seconds. Closes ticket 25132.
9378 o Minor features (denial-of-service avoidance):
9379 - Make our OOM handler aware of the DNS cache so that it doesn't
9380 fill up the memory. This check is important for our DoS mitigation
9381 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9383 o Minor features (development):
9384 - Tor's makefile now supports running the "clippy" Rust style tool
9385 on our Rust code. Closes ticket 22156.
9387 o Minor features (directory authority):
9388 - There is no longer an artificial upper limit on the length of
9389 bandwidth lines. Closes ticket 26223.
9390 - When a bandwidth file is used to obtain the bandwidth measurements,
9391 include this bandwidth file headers in the votes. Closes
9393 - Improved support for networks with only a single authority or a
9394 single fallback directory. Patch from Gabriel Somlo. Closes
9397 o Minor features (embedding API):
9398 - The Tor controller API now supports a function to launch Tor with
9399 a preconstructed owning controller FD, so that embedding
9400 applications don't need to manage controller ports and
9401 authentication. Closes ticket 24204.
9402 - The Tor controller API now has a function that returns the name
9403 and version of the backend implementing the API. Closes
9406 o Minor features (geoip):
9407 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9408 Country database. Closes ticket 27631.
9410 o Minor features (memory management):
9411 - Get Libevent to use the same memory allocator as Tor, by calling
9412 event_set_mem_functions() during initialization. Resolves
9415 o Minor features (memory usage):
9416 - When not using them, store legacy TAP public onion keys in DER-
9417 encoded format, rather than as expanded public keys. This should
9418 save several megabytes on typical clients. Closes ticket 27246.
9420 o Minor features (OpenSSL):
9421 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9422 than our own. Resolves ticket 19979.
9424 o Minor features (Rust, code quality):
9425 - Improve rust code quality in the rust protover implementation by
9426 making it more idiomatic. Includes changing an internal API to
9427 take &str instead of &String. Closes ticket 26492.
9429 o Minor features (testing):
9430 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9431 chutney. Implements ticket 27211.
9433 o Minor features (tor-resolve):
9434 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9435 Side-effect of the refactoring for ticket 26526.
9437 o Minor features (UI):
9438 - Log each included configuration file or directory as we read it,
9439 to provide more visibility about where Tor is reading from. Patch
9440 from Unto Sten; closes ticket 27186.
9441 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
9442 Closes ticket 26703.
9444 o Minor bugfixes (bootstrap):
9445 - Try harder to get descriptors in non-exit test networks, by using
9446 the mid weight for the third hop when there are no exits. Fixes
9447 bug 27237; bugfix on 0.2.6.2-alpha.
9449 o Minor bugfixes (C correctness):
9450 - Avoid casting smartlist index to int implicitly, as it may trigger
9451 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
9452 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
9453 - Use time_t for all values in
9454 predicted_ports_prediction_time_remaining(). Rework the code that
9455 computes difference between durations/timestamps. Fixes bug 27165;
9456 bugfix on 0.3.1.1-alpha.
9458 o Minor bugfixes (client, memory usage):
9459 - When not running as a directory cache, there is no need to store
9460 the text of the current consensus networkstatus in RAM.
9461 Previously, however, clients would store it anyway, at a cost of
9462 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
9465 o Minor bugfixes (client, reachableaddresses):
9466 - Instead of adding a "reject *:*" line to ReachableAddresses when
9467 loading the configuration, add one to the policy after parsing it
9468 in parse_reachable_addresses(). This prevents extra "reject *.*"
9469 lines from accumulating on reloads. Fixes bug 20874; bugfix on
9470 0.1.1.5-alpha. Patch by Neel Chauhan.
9472 o Minor bugfixes (code quality):
9473 - Rename sandbox_getaddrinfo() and other functions to no longer
9474 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
9475 bugfix on 0.2.7.1-alpha.
9477 o Minor bugfixes (configuration, Onion Services):
9478 - In rend_service_parse_port_config(), disallow any input to remain
9479 after address-port pair was parsed. This will catch address and
9480 port being whitespace-separated by mistake of the user. Fixes bug
9481 27044; bugfix on 0.2.9.10.
9483 o Minor bugfixes (continuous integration):
9484 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9485 27464; bugfix on 0.3.4.1-alpha.
9487 o Minor bugfixes (controller):
9488 - Consider all routerinfo errors other than "not a server" to be
9489 transient for the purpose of "GETINFO exit-policy/*" controller
9490 request. Print stacktrace in the unlikely case of failing to
9491 recompute routerinfo digest. Fixes bug 27034; bugfix
9494 o Minor bugfixes (directory connection shutdown):
9495 - Avoid a double-close when shutting down a stalled directory
9496 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9498 o Minor bugfixes (HTTP tunnel):
9499 - Fix a bug warning when closing an HTTP tunnel connection due to an
9500 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9503 o Minor bugfixes (ipv6):
9504 - In addrs_in_same_network_family(), we choose the subnet size based
9505 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
9506 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
9507 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
9509 o Minor bugfixes (logging):
9510 - As a precaution, do an early return from log_addr_has_changed() if
9511 Tor is running as client. Also, log a stack trace for debugging as
9512 this function should only be called when Tor runs as server. Fixes
9513 bug 26892; bugfix on 0.1.1.9-alpha.
9514 - Refrain from mentioning bug 21018 in the logs, as it is already
9515 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
9517 o Minor bugfixes (logging, documentation):
9518 - When SafeLogging is enabled, scrub IP address in
9519 channel_tls_process_netinfo_cell(). Also, add a note to manpage
9520 that scrubbing is not guaranteed on loglevels below Notice. Fixes
9521 bug 26882; bugfix on 0.2.4.10-alpha.
9523 o Minor bugfixes (netflow padding):
9524 - Ensure circuitmux queues are empty before scheduling or sending
9525 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9527 o Minor bugfixes (onion service v2):
9528 - Log at level "info", not "warning", in the case that we do not
9529 have a consensus when a .onion request comes in. This can happen
9530 normally while bootstrapping. Fixes bug 27040; bugfix
9533 o Minor bugfixes (onion service v3):
9534 - When the onion service directory can't be created or has the wrong
9535 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9538 o Minor bugfixes (OS compatibility):
9539 - Properly handle configuration changes that move a listener to/from
9540 wildcard IP address. If the first attempt to bind a socket fails,
9541 close the old listener and try binding the socket again. Fixes bug
9542 17873; bugfix on 0.0.8pre-1.
9544 o Minor bugfixes (performance)::
9545 - Rework node_is_a_configured_bridge() to no longer call
9546 node_get_all_orports(), which was performing too many memory
9547 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
9549 o Minor bugfixes (relay statistics):
9550 - Update relay descriptor on bandwidth changes only when the uptime
9551 is smaller than 24h, in order to reduce the efficiency of guard
9552 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9554 o Minor bugfixes (relays):
9555 - Consider the fact that we'll be making direct connections to our
9556 entry and guard nodes when computing the fraction of nodes that
9557 have their descriptors. Also, if we are using bridges and there is
9558 at least one bridge with a full descriptor, treat the fraction of
9559 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
9560 Patch by Neel Chauhan.
9561 - Update the message logged on relays when DirCache is disabled.
9562 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
9563 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9565 o Minor bugfixes (rust, protover):
9566 - Compute protover votes correctly in the rust version of the
9567 protover code. Previously, the protover rewrite in 24031 allowed
9568 repeated votes from the same voter for the same protocol version
9569 to be counted multiple times in protover_compute_vote(). Fixes bug
9570 27649; bugfix on 0.3.3.5-rc.
9571 - Reject protover names that contain invalid characters. Fixes bug
9572 27687; bugfix on 0.3.3.1-alpha.
9574 o Minor bugfixes (testing):
9575 - Fix two unit tests to work when HOME environment variable is not
9576 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9577 - If a unit test running in a subprocess exits abnormally or with a
9578 nonzero status code, treat the test as having failed, even if the
9579 test reported success. Without this fix, memory leaks don't cause
9580 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9581 bugfix on 0.2.2.4-alpha.
9582 - When logging a version mismatch in our openssl_version tests,
9583 report the actual offending version strings. Fixes bug 26152;
9584 bugfix on 0.2.9.1-alpha.
9585 - Fix forking tests on Windows when there is a space somewhere in
9586 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
9588 o Code simplification and refactoring:
9589 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
9590 longer needed. Closes ticket 26502.
9591 - Include paths to header files within Tor are now qualified by
9592 directory within the top-level src directory.
9593 - Many structures have been removed from the centralized "or.h"
9594 header, and moved into their own headers. This will allow us to
9595 reduce the number of places in the code that rely on each
9596 structure's contents and layout. Closes ticket 26383.
9597 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
9598 - Remove GetAdaptersAddresses_fn_t. The code that used it was
9599 removed as part of the 26481 refactor. Closes ticket 27467.
9600 - Rework Tor SOCKS server code to use Trunnel and benefit from
9601 autogenerated functions for parsing and generating SOCKS wire
9602 format. New implementation is cleaner, more maintainable and
9603 should be less prone to heartbleed-style vulnerabilities.
9604 Implements a significant fraction of ticket 3569.
9605 - Split sampled_guards_update_from_consensus() and
9606 select_entry_guard_for_circuit() into subfunctions. In
9607 entry_guards_update_primary() unite three smartlist enumerations
9608 into one and move smartlist comparison code out of the function.
9609 Closes ticket 21349.
9610 - Tor now assumes that you have standards-conformant stdint.h and
9611 inttypes.h headers when compiling. Closes ticket 26626.
9612 - Unify our bloom filter logic. Previously we had two copies of this
9613 code: one for routerlist filtering, and one for address set
9614 calculations. Closes ticket 26510.
9615 - Use the simpler strcmpstart() helper in
9616 rend_parse_v2_service_descriptor instead of strncmp(). Closes
9618 - Utility functions that can perform a DNS lookup are now wholly
9619 separated from those that can't, in separate headers and C
9620 modules. Closes ticket 26526.
9623 - Copy paragraph and URL to Tor's code of conduct document from
9624 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
9625 - Remove old instructions from INSTALL document. Closes ticket 26588.
9626 - Warn users that they should not include MyFamily line(s) in their
9627 torrc when running Tor bridge. Closes ticket 26908.
9630 - Tor no longer supports building with the dmalloc library. For
9631 debugging memory issues, we suggest using gperftools or msan
9632 instead. Closes ticket 26426.
9633 - Tor no longer attempts to run on Windows environments without the
9634 GetAdaptersAddresses() function. This function has existed since
9635 Windows XP, which is itself already older than we support.
9636 - Remove Tor2web functionality for version 2 onion services. The
9637 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
9638 (This feature was never shipped in vanilla Tor and it was only
9639 possible to use this feature by building the support at compile
9640 time. Tor2webMode is not implemented for version 3 onion services.)
9641 Closes ticket 26367.
9644 Changes in version 0.2.9.17 - 2018-09-10
9645 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
9647 o Minor features (compatibility, backport from 0.3.4.8):
9648 - Tell OpenSSL to maintain backward compatibility with previous
9649 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9650 ciphers are disabled by default. Closes ticket 27344.
9652 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9653 - Enable macOS builds in our Travis CI configuration. Closes
9655 - Install libcap-dev and libseccomp2-dev so these optional
9656 dependencies get tested on Travis CI. Closes ticket 26560.
9657 - Run asciidoc during Travis CI. Implements ticket 27087.
9658 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9660 o Minor features (geoip):
9661 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9662 Country database. Closes ticket 27089.
9664 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9665 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9666 tell the compiler not to include the system malloc implementation.
9667 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9669 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9670 - Silence a spurious compiler warning on the GetAdaptersAddresses
9671 function pointer cast. This issue is already fixed by 26481 in
9672 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9673 bugfix on 0.2.3.11-alpha.
9674 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9675 supported, and always fails. Some compilers warn about the
9676 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9679 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9680 - Don't link or search for pthreads when building for Windows, even
9681 if we are using build environment (like mingw) that provides a
9682 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9684 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9685 - Skip a pair of unreliable key generation tests on Windows, until
9686 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9687 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9689 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9690 - Pass the module flags to distcheck configure, and log the flags
9691 before running configure. (Backported to 0.2.9 and later as a
9692 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9694 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9695 - When a Travis build fails, and showing a log fails, keep trying to
9696 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9697 - When we use echo in Travis, don't pass a --flag as the first
9698 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9700 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9701 - When voting for recommended versions, make sure that all of the
9702 versions are well-formed and parsable. Fixes bug 26485; bugfix
9705 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9706 - Fix a bug in out sandboxing rules for the openat() syscall.
9707 Previously, no openat() call would be permitted, which would break
9708 filesystem operations on recent glibc versions. Fixes bug 25440;
9709 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9711 o Minor bugfixes (onion services, backport from 0.3.4.8):
9712 - Silence a spurious compiler warning in
9713 rend_client_send_introduction(). Fixes bug 27463; bugfix
9716 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9717 - Log a protocol warning when single onion services or Tor2web clients
9718 fail to authenticate direct connections to relays.
9719 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9721 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9722 - Disable core dumps in test_bt.sh, to avoid failures in "make
9723 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9725 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9726 - Before running make test-network-all, delete old logs and test
9727 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9730 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9731 - Our "tortls/cert_matches_key" unit test no longer relies on
9732 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9733 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9734 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9736 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9737 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9738 27185; bugfix on 0.2.2.2-alpha.
9741 Changes in version 0.3.2.12 - 2018-09-10
9742 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
9744 o Minor features (compatibility, backport from 0.3.4.8):
9745 - Tell OpenSSL to maintain backward compatibility with previous
9746 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9747 ciphers are disabled by default. Closes ticket 27344.
9749 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9750 - Enable macOS builds in our Travis CI configuration. Closes
9752 - Install libcap-dev and libseccomp2-dev so these optional
9753 dependencies get tested on Travis CI. Closes ticket 26560.
9754 - Run asciidoc during Travis CI. Implements ticket 27087.
9755 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9757 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9758 - Use cargo cache in our Travis CI configuration. Closes
9761 o Minor features (controller, backport from 0.3.4.6-rc):
9762 - The control port now exposes the list of HTTPTunnelPorts and
9763 ExtOrPorts via GETINFO net/listeners/httptunnel and
9764 net/listeners/extor respectively. Closes ticket 26647.
9766 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9767 - Authorities no longer vote to make the subprotocol version
9768 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9769 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9771 o Minor features (geoip):
9772 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9773 Country database. Closes ticket 27089.
9775 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9776 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9777 tell the compiler not to include the system malloc implementation.
9778 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9779 - Don't try to use a pragma to temporarily disable the
9780 -Wunused-const-variable warning if the compiler doesn't support
9781 it. Fixes bug 26785; bugfix on 0.3.2.11.
9783 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9784 - Silence a spurious compiler warning on the GetAdaptersAddresses
9785 function pointer cast. This issue is already fixed by 26481 in
9786 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9787 bugfix on 0.2.3.11-alpha.
9788 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9789 supported, and always fails. Some compilers warn about the
9790 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9793 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9794 - Don't link or search for pthreads when building for Windows, even
9795 if we are using build environment (like mingw) that provides a
9796 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9798 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9799 - Skip a pair of unreliable key generation tests on Windows, until
9800 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9801 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9803 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9804 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9805 - Pass the module flags to distcheck configure, and log the flags
9806 before running configure. (Backported to 0.2.9 and later as a
9807 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9809 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9810 - When a Travis build fails, and showing a log fails, keep trying to
9811 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9812 - When we use echo in Travis, don't pass a --flag as the first
9813 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9815 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9816 - When voting for recommended versions, make sure that all of the
9817 versions are well-formed and parsable. Fixes bug 26485; bugfix
9820 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9821 - Fix a bug in out sandboxing rules for the openat() syscall.
9822 Previously, no openat() call would be permitted, which would break
9823 filesystem operations on recent glibc versions. Fixes bug 25440;
9824 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9826 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9827 - Improve the log message when connection initiators fail to
9828 authenticate direct connections to relays. Fixes bug 26927; bugfix
9831 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9832 - Fix bug that causes services to not ever rotate their descriptors
9833 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9836 o Minor bugfixes (onion services, backport from 0.3.4.8):
9837 - Silence a spurious compiler warning in
9838 rend_client_send_introduction(). Fixes bug 27463; bugfix
9841 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9842 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9844 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9845 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9846 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9847 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9849 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9850 - Log a protocol warning when single onion services or Tor2web clients
9851 fail to authenticate direct connections to relays.
9852 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9854 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9855 - Disable core dumps in test_bt.sh, to avoid failures in "make
9856 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9858 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9859 - When running make test-network-all, use the mixed+hs-v2 network.
9860 (A previous fix to chutney removed v3 onion services from the
9861 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9862 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9863 - Before running make test-network-all, delete old logs and test
9864 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9867 o Minor bugfixes (testing, openssl compatibility):
9868 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
9869 internals. Previously, it relied on unsupported OpenSSL behavior in
9870 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
9871 bugfix on 0.2.5.1-alpha.
9873 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9874 - Our "tortls/cert_matches_key" unit test no longer relies on
9875 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9876 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9877 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9879 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9880 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9881 27185; bugfix on 0.2.2.2-alpha.
9884 Changes in version 0.3.3.10 - 2018-09-10
9885 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
9887 o Minor features (bug workaround, backport from 0.3.4.7-rc):
9888 - Compile correctly on systems that provide the C11 stdatomic.h
9889 header, but where C11 atomic functions don't actually compile.
9890 Closes ticket 26779; workaround for Debian issue 903709.
9892 o Minor features (compatibility, backport from 0.3.4.8):
9893 - Tell OpenSSL to maintain backward compatibility with previous
9894 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9895 ciphers are disabled by default. Closes ticket 27344.
9897 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9898 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9899 - Enable macOS builds in our Travis CI configuration. Closes
9901 - Install libcap-dev and libseccomp2-dev so these optional
9902 dependencies get tested on Travis CI. Closes ticket 26560.
9903 - Run asciidoc during Travis CI. Implements ticket 27087.
9904 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9906 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9907 - Use cargo cache in our Travis CI configuration. Closes
9910 o Minor features (controller, backport from 0.3.4.6-rc):
9911 - The control port now exposes the list of HTTPTunnelPorts and
9912 ExtOrPorts via GETINFO net/listeners/httptunnel and
9913 net/listeners/extor respectively. Closes ticket 26647.
9915 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9916 - Authorities no longer vote to make the subprotocol version
9917 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9918 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9920 o Minor features (geoip):
9921 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9922 Country database. Closes ticket 27089.
9924 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9925 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9926 tell the compiler not to include the system malloc implementation.
9927 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9928 - Don't try to use a pragma to temporarily disable the
9929 -Wunused-const-variable warning if the compiler doesn't support
9930 it. Fixes bug 26785; bugfix on 0.3.2.11.
9932 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9933 - Silence a spurious compiler warning on the GetAdaptersAddresses
9934 function pointer cast. This issue is already fixed by 26481 in
9935 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9936 bugfix on 0.2.3.11-alpha.
9937 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9938 supported, and always fails. Some compilers warn about the
9939 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9942 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9943 - Don't link or search for pthreads when building for Windows, even
9944 if we are using build environment (like mingw) that provides a
9945 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9947 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9948 - Skip a pair of unreliable key generation tests on Windows, until
9949 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9950 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9952 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9953 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9954 - Pass the module flags to distcheck configure, and log the flags
9955 before running configure. (Backported to 0.2.9 and later as a
9956 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9958 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9959 - When a Travis build fails, and showing a log fails, keep trying to
9960 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9961 - When we use echo in Travis, don't pass a --flag as the first
9962 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9964 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9965 - When voting for recommended versions, make sure that all of the
9966 versions are well-formed and parsable. Fixes bug 26485; bugfix
9969 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
9970 - Always call tor_free_all() when leaving tor_run_main(). When we
9971 did not, restarting tor in-process would cause an assertion
9972 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9974 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9975 - Fix a bug in our sandboxing rules for the openat() syscall.
9976 Previously, no openat() call would be permitted, which would break
9977 filesystem operations on recent glibc versions. Fixes bug 25440;
9978 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9980 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9981 - Improve the log message when connection initiators fail to
9982 authenticate direct connections to relays. Fixes bug 26927; bugfix
9985 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9986 - Fix bug that causes services to not ever rotate their descriptors
9987 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9990 o Minor bugfixes (onion services, backport from 0.3.4.8):
9991 - Silence a spurious compiler warning in
9992 rend_client_send_introduction(). Fixes bug 27463; bugfix
9995 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
9996 - Work around two different bugs in the OS X 10.10 and later SDKs
9997 that would prevent us from successfully targeting earlier versions
9998 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10000 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
10001 - Fix compilation of the unit tests on GNU/Hurd, which does not
10002 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10005 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
10006 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10008 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10009 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10010 - Protover parsing was accepting the presence of whitespace in
10011 version strings, which the C implementation would choke on, e.g.
10012 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10013 - Protover parsing was ignoring a 2nd hyphen and everything after
10014 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10016 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10017 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10018 - cd to ${abs_top_builddir}/src/rust before running cargo in
10019 src/test/test_rust.sh. This makes the working directory consistent
10020 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10022 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
10023 - Log a protocol warning when single onion services or Tor2web clients
10024 fail to authenticate direct connections to relays.
10025 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
10027 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
10028 - Disable core dumps in test_bt.sh, to avoid failures in "make
10029 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10031 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
10032 - When running make test-network-all, use the mixed+hs-v2 network.
10033 (A previous fix to chutney removed v3 onion services from the
10034 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10035 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10036 - Before running make test-network-all, delete old logs and test
10037 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10040 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
10041 - Our "tortls/cert_matches_key" unit test no longer relies on
10042 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10043 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10044 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10046 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
10047 - Stop sending ed25519 link specifiers in v3 onion service introduce
10048 cells and descriptors, when the rendezvous or introduction point
10049 doesn't support ed25519 link authentication. Fixes bug 26627;
10050 bugfix on 0.3.2.4-alpha.
10052 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
10053 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10054 27185; bugfix on 0.2.2.2-alpha.
10057 Changes in version 0.3.4.8 - 2018-09-10
10058 Tor 0.3.4.8 is the first stable release in its series; it includes
10059 compilation and portability fixes.
10061 The Tor 0.3.4 series includes improvements for running Tor in
10062 low-power and embedded environments, which should help performance in
10063 general. We've begun work on better modularity, and included preliminary
10064 changes on the directory authority side to accommodate a new bandwidth
10065 measurement system. We've also integrated more continuous-integration
10066 systems into our development process, and made corresponding changes to
10067 Tor's testing infrastructure. Finally, we've continued to refine
10068 our anti-denial-of-service code.
10070 Below are the changes since 0.3.4.7-rc. For a complete list of changes
10071 since 0.3.3.9, see the ReleaseNotes file.
10073 o Minor features (compatibility):
10074 - Tell OpenSSL to maintain backward compatibility with previous
10075 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
10076 ciphers are disabled by default. Closes ticket 27344.
10078 o Minor features (continuous integration):
10079 - Log the compiler path and version during Appveyor builds.
10080 Implements ticket 27449.
10081 - Show config.log and test-suite.log after failed Appveyor builds.
10082 Also upload the zipped full logs as a build artifact. Implements
10085 o Minor bugfixes (compilation):
10086 - Silence a spurious compiler warning on the GetAdaptersAddresses
10087 function pointer cast. This issue is already fixed by 26481 in
10088 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
10089 bugfix on 0.2.3.11-alpha.
10090 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
10091 supported, and always fails. Some compilers warn about the
10092 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
10095 o Minor bugfixes (continuous integration):
10096 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
10097 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
10098 Executables compiled for 64-bit Windows with this version of gcc
10099 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
10100 27460; bugfix on 0.3.4.1-alpha.
10101 - When a Travis build fails, and showing a log fails, keep trying to
10102 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
10103 - When we use echo in Travis, don't pass a --flag as the first
10104 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
10106 o Minor bugfixes (onion services):
10107 - Silence a spurious compiler warning in
10108 rend_client_send_introduction(). Fixes bug 27463; bugfix
10111 o Minor bugfixes (testing, chutney):
10112 - When running make test-network-all, use the mixed+hs-v2 network.
10113 (A previous fix to chutney removed v3 onion services from the
10114 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
10115 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
10116 - Before running make test-network-all, delete old logs and test
10117 result files, to avoid spurious failures. Fixes bug 27295; bugfix
10120 Changes in version 0.3.4.7-rc - 2018-08-24
10121 Tor 0.3.4.7-rc fixes several small compilation, portability, and
10122 correctness issues in previous versions of Tor. This version is a
10123 release candidate: if no serious bugs are found, we expect that the
10124 stable 0.3.4 release will be (almost) the same as this release.
10126 o Minor features (bug workaround):
10127 - Compile correctly on systems that provide the C11 stdatomic.h
10128 header, but where C11 atomic functions don't actually compile.
10129 Closes ticket 26779; workaround for Debian issue 903709.
10131 o Minor features (continuous integration):
10132 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
10133 - Enable macOS builds in our Travis CI configuration. Closes
10135 - Install libcap-dev and libseccomp2-dev so these optional
10136 dependencies get tested on Travis CI. Closes ticket 26560.
10137 - Only post Appveyor IRC notifications when the build fails.
10138 Implements ticket 27275.
10139 - Run asciidoc during Travis CI. Implements ticket 27087.
10140 - Use ccache in our Travis CI configuration. Closes ticket 26952.
10142 o Minor features (continuous integration, rust):
10143 - Use cargo cache in our Travis CI configuration. Closes
10146 o Minor features (directory authorities):
10147 - Authorities no longer vote to make the subprotocol version
10148 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
10149 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
10151 o Minor features (geoip):
10152 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
10153 Country database. Closes ticket 27089.
10155 o Minor bugfixes (compilation, windows):
10156 - Don't link or search for pthreads when building for Windows, even
10157 if we are using build environment (like mingw) that provides a
10158 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
10160 o Minor bugfixes (continuous integration):
10161 - Improve Appveyor CI IRC logging. Generate correct branches and
10162 URLs for pull requests and tags. Use unambiguous short commits.
10163 Fixes bug 26979; bugfix on master.
10164 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
10165 - Pass the module flags to distcheck configure, and log the flags
10166 before running configure. (Backported to 0.2.9 and later as a
10167 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
10169 o Minor bugfixes (in-process restart):
10170 - Always call tor_free_all() when leaving tor_run_main(). When we
10171 did not, restarting tor in-process would cause an assertion
10172 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
10174 o Minor bugfixes (linux seccomp2 sandbox):
10175 - Fix a bug in out sandboxing rules for the openat() syscall.
10176 Previously, no openat() call would be permitted, which would break
10177 filesystem operations on recent glibc versions. Fixes bug 25440;
10178 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
10180 o Minor bugfixes (onion services):
10181 - Fix bug that causes services to not ever rotate their descriptors
10182 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
10185 o Minor bugfixes (portability):
10186 - Fix compilation of the unit tests on GNU/Hurd, which does not
10187 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
10190 o Minor bugfixes (rust):
10191 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
10193 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
10194 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
10195 - Protover parsing was accepting the presence of whitespace in
10196 version strings, which the C implementation would choke on, e.g.
10197 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
10198 - Protover parsing was ignoring a 2nd hyphen and everything after
10199 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
10201 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
10202 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
10203 - cd to ${abs_top_builddir}/src/rust before running cargo in
10204 src/test/test_rust.sh. This makes the working directory consistent
10205 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
10207 o Minor bugfixes (testing, bootstrap):
10208 - When calculating bootstrap progress, check exit policies and the
10209 exit flag. Previously, Tor would only check the exit flag, which
10210 caused race conditions in small and fast networks like chutney.
10211 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
10213 o Minor bugfixes (testing, openssl compatibility):
10214 - Our "tortls/cert_matches_key" unit test no longer relies on
10215 OpenSSL internals. Previously, it relied on unsupported OpenSSL
10216 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
10217 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
10219 o Minor bugfixes (Windows, compilation):
10220 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
10221 27185; bugfix on 0.2.2.2-alpha.
10224 Changes in version 0.3.4.6-rc - 2018-08-06
10225 Tor 0.3.4.6-rc fixes several small compilation, portability, and
10226 correctness issues in previous versions of Tor. This version is a
10227 release candidate: if no serious bugs are found, we expect that the
10228 stable 0.3.4 release will be (almost) the same as this release.
10230 o Major bugfixes (event scheduler):
10231 - When we enable a periodic event, schedule it in the event loop
10232 rather than running it immediately. Previously, we would re-run
10233 periodic events immediately in the middle of (for example)
10234 changing our options, with unpredictable effects. Fixes bug 27003;
10235 bugfix on 0.3.4.1-alpha.
10237 o Minor features (compilation):
10238 - When building Tor, prefer to use Python 3 over Python 2, and more
10239 recent (contemplated) versions over older ones. Closes
10241 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10242 tell the compiler not to include the system malloc implementation.
10243 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10244 - Don't try to use a pragma to temporarily disable the
10245 -Wunused-const-variable warning if the compiler doesn't support
10246 it. Fixes bug 26785; bugfix on 0.3.2.11.
10248 o Minor bugfixes (continuous integration):
10249 - Skip a pair of unreliable key generation tests on Windows, until
10250 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10251 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10253 o Minor features (controller):
10254 - The control port now exposes the list of HTTPTunnelPorts and
10255 ExtOrPorts via GETINFO net/listeners/httptunnel and
10256 net/listeners/extor respectively. Closes ticket 26647.
10258 o Minor bugfixes (directory authority):
10259 - When voting for recommended versions, make sure that all of the
10260 versions are well-formed and parsable. Fixes bug 26485; bugfix
10263 o Minor features (geoip):
10264 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10265 Country database. Closes ticket 26674.
10267 o Minor features (Rust, portability):
10268 - Rust cross-compilation is now supported. Closes ticket 25895.
10270 o Minor bugfixes (compilation):
10271 - Update build system so that tor builds again with --disable-unittests
10272 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10273 - Fix a compilation warning on some versions of GCC when building
10274 code that calls routerinfo_get_my_routerinfo() twice, assuming
10275 that the second call will succeed if the first one did. Fixes bug
10276 26269; bugfix on 0.2.8.2-alpha.
10278 o Minor bugfixes (controller):
10279 - Report the port correctly when a port is configured to bind to
10280 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10281 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10282 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10283 on 0.3.3.1-alpha. Patch by "akwizgran".
10285 o Minor bugfixes (correctness, flow control):
10286 - Upon receiving a stream-level SENDME cell, verify that our window
10287 has not grown too large. Fixes bug 26214; bugfix on svn
10290 o Minor bugfixes (memory, correctness):
10291 - Fix a number of small memory leaks identified by coverity. Fixes
10292 bug 26467; bugfix on numerous Tor versions.
10294 o Minor bugfixes (logging):
10295 - Improve the log message when connection initiators fail to
10296 authenticate direct connections to relays. Fixes bug 26927; bugfix
10299 o Minor bugfixes (portability):
10300 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10301 26994; bugfix on 0.3.4.1-alpha.
10302 - Work around two different bugs in the OS X 10.10 and later SDKs
10303 that would prevent us from successfully targeting earlier versions
10304 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10306 o Minor bugfixes (single onion services, Tor2web):
10307 - Log a protocol warning when single onion services or Tor2web
10308 clients fail to authenticate direct connections to relays. Fixes
10309 bug 26924; bugfix on 0.2.9.1-alpha.
10311 o Minor bugfixes (testing):
10312 - Disable core dumps in test_bt.sh, to avoid failures in "make
10313 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10315 o Minor bugfixes (testing, compatibility):
10316 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10317 only to pass strings (rather than "bytes" objects) to the Python
10318 subprocess module. Python 3 on Windows seems to require this.
10319 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10320 0.3.1.1-alpha (for hs_ntor_ref.py).
10322 o Minor bugfixes (v3 onion services):
10323 - Stop sending ed25519 link specifiers in v3 onion service introduce
10324 cells and descriptors, when the rendezvous or introduction point
10325 doesn't support ed25519 link authentication. Fixes bug 26627;
10326 bugfix on 0.3.2.4-alpha.
10329 Changes in version 0.3.4.5-rc - 2018-07-13
10330 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10331 bridge relays should upgrade.
10333 o Directory authority changes:
10334 - The "Bifroest" bridge authority has been retired; the new bridge
10335 authority is "Serge", and it is operated by George from the
10336 TorBSD project. Closes ticket 26771.
10339 Changes in version 0.3.3.9 - 2018-07-13
10340 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10341 bridge relays should upgrade.
10343 o Directory authority changes:
10344 - The "Bifroest" bridge authority has been retired; the new bridge
10345 authority is "Serge", and it is operated by George from the
10346 TorBSD project. Closes ticket 26771.
10349 Changes in version 0.3.2.11 - 2018-07-13
10350 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10351 bridge relays should upgrade. We also take this opportunity to backport
10354 o Directory authority changes:
10355 - The "Bifroest" bridge authority has been retired; the new bridge
10356 authority is "Serge", and it is operated by George from the
10357 TorBSD project. Closes ticket 26771.
10359 o Directory authority changes (backport from 0.3.3.7):
10360 - Add an IPv6 address for the "dannenberg" directory authority.
10361 Closes ticket 26343.
10363 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10364 - When directory authorities read a zero-byte bandwidth file, they
10365 would previously log a warning with the contents of an
10366 uninitialised buffer. They now log a warning about the empty file
10367 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10369 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10370 - Correctly detect when onion services get disabled after HUP. Fixes
10371 bug 25761; bugfix on 0.3.2.1.
10373 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10374 - Explicitly permit the poll() system call when the Linux
10375 seccomp2-based sandbox is enabled: apparently, some versions of
10376 libc use poll() when calling getpwnam(). Closes ticket 25313.
10378 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10379 - Update the Travis CI configuration to use the stable Rust channel,
10380 now that we have decided to require that. Closes ticket 25714.
10382 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10383 - Our .travis.yml configuration now includes support for testing the
10384 results of "make distcheck". (It's not uncommon for "make check"
10385 to pass but "make distcheck" to fail.) Closes ticket 25814.
10386 - Our Travis CI configuration now integrates with the Coveralls
10387 coverage analysis tool. Closes ticket 25818.
10389 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10390 - Add several checks to detect whether Tor relays are uploading
10391 their descriptors without specifying why they regenerated them.
10392 Diagnostic for ticket 25686.
10394 o Minor features (compilation, backport from 0.3.4.4-rc):
10395 - When building Tor, prefer to use Python 3 over Python 2, and more
10396 recent (contemplated) versions over older ones. Closes
10399 o Minor features (geoip):
10400 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10401 Country database. Closes ticket 26674.
10403 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10404 - Upon receiving a malformed connected cell, stop processing the
10405 cell immediately. Previously we would mark the connection for
10406 close, but continue processing the cell as if the connection were
10407 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10409 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10410 - Allow the nanosleep() system call, which glibc uses to implement
10411 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10413 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10414 - When running the hs_ntor_ref.py test, make sure only to pass
10415 strings (rather than "bytes" objects) to the Python subprocess
10416 module. Python 3 on Windows seems to require this. Fixes bug
10417 26535; bugfix on 0.3.1.1-alpha.
10418 - When running the ntor_ref.py test, make sure only to pass strings
10419 (rather than "bytes" objects) to the Python subprocess module.
10420 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10423 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10424 - Work around a change in OpenSSL 1.1.1 where return values that
10425 would previously indicate "no password" now indicate an empty
10426 password. Without this workaround, Tor instances running with
10427 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10428 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10430 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10431 - Document that the PerConnBW{Rate,Burst} options will fall back to
10432 their corresponding consensus parameters only if those parameters
10433 are set. Previously we had claimed that these values would always
10434 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10436 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10437 - Fix a compilation warning on some versions of GCC when building
10438 code that calls routerinfo_get_my_routerinfo() twice, assuming
10439 that the second call will succeed if the first one did. Fixes bug
10440 26269; bugfix on 0.2.8.2-alpha.
10442 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10443 - Don't consider Tor running as a client if the ControlPort is open,
10444 but no actual client ports are open. Fixes bug 26062; bugfix
10447 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10448 - Prevent a possible out-of-bounds smartlist read in
10449 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10451 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10452 - Fix a very unlikely (impossible, we believe) null pointer
10453 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10454 Coverity; this is CID 1430932.
10456 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10457 - Fix a memory leak when a v3 onion service is configured and gets a
10458 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10459 - When parsing the descriptor signature, look for the token plus an
10460 extra white-space at the end. This is more correct but also will
10461 allow us to support new fields that might start with "signature".
10462 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10464 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10465 - Relays now correctly block attempts to re-extend to the previous
10466 relay by Ed25519 identity. Previously they would warn in this
10467 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10470 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10471 - Avoid a crash when running with DirPort set but ORPort turned off.
10472 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10474 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10475 - Silence unused-const-variable warnings in zstd.h with some GCC
10476 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10478 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
10479 - Avoid intermittent test failures due to a test that had relied on
10480 onion service introduction point creation finishing within 5
10481 seconds of real clock time. Fixes bug 25450; bugfix
10484 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
10485 - Fix a C99 compliance issue in our configuration script that caused
10486 compilation issues when compiling Tor with certain versions of
10487 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10489 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10490 - Fix a number of small memory leaks identified by coverity. Fixes
10491 bug 26467; bugfix on numerous Tor versions.
10493 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10494 - Move the list of default directory authorities to its own file.
10495 Closes ticket 24854. Patch by "beastr0".
10498 Changes in version 0.2.9.16 - 2018-07-13
10499 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
10500 bridge relays should upgrade. We also take this opportunity to backport
10503 o Directory authority changes:
10504 - The "Bifroest" bridge authority has been retired; the new bridge
10505 authority is "Serge", and it is operated by George from the
10506 TorBSD project. Closes ticket 26771.
10508 o Directory authority changes (backport from 0.3.3.7):
10509 - Add an IPv6 address for the "dannenberg" directory authority.
10510 Closes ticket 26343.
10512 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10513 - When directory authorities read a zero-byte bandwidth file, they
10514 would previously log a warning with the contents of an
10515 uninitialised buffer. They now log a warning about the empty file
10516 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10518 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10519 - Explicitly permit the poll() system call when the Linux
10520 seccomp2-based sandbox is enabled: apparently, some versions of
10521 libc use poll() when calling getpwnam(). Closes ticket 25313.
10523 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10524 - Our .travis.yml configuration now includes support for testing the
10525 results of "make distcheck". (It's not uncommon for "make check"
10526 to pass but "make distcheck" to fail.) Closes ticket 25814.
10527 - Our Travis CI configuration now integrates with the Coveralls
10528 coverage analysis tool. Closes ticket 25818.
10530 o Minor features (compilation, backport from 0.3.4.4-rc):
10531 - When building Tor, prefer to use Python 3 over Python 2, and more
10532 recent (contemplated) versions over older ones. Closes
10535 o Minor features (geoip):
10536 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10537 Country database. Closes ticket 26674.
10539 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10540 - Upon receiving a malformed connected cell, stop processing the
10541 cell immediately. Previously we would mark the connection for
10542 close, but continue processing the cell as if the connection were
10543 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10545 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10546 - Allow the nanosleep() system call, which glibc uses to implement
10547 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10549 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10550 - When running the ntor_ref.py test, make sure only to pass strings
10551 (rather than "bytes" objects) to the Python subprocess module.
10552 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10555 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10556 - Work around a change in OpenSSL 1.1.1 where return values that
10557 would previously indicate "no password" now indicate an empty
10558 password. Without this workaround, Tor instances running with
10559 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10560 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10562 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10563 - Fix a compilation warning on some versions of GCC when building
10564 code that calls routerinfo_get_my_routerinfo() twice, assuming
10565 that the second call will succeed if the first one did. Fixes bug
10566 26269; bugfix on 0.2.8.2-alpha.
10568 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10569 - Don't consider Tor running as a client if the ControlPort is open,
10570 but no actual client ports are open. Fixes bug 26062; bugfix
10573 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10574 - Prevent a possible out-of-bounds smartlist read in
10575 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10577 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10578 - Fix a very unlikely (impossible, we believe) null pointer
10579 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10580 Coverity; this is CID 1430932.
10582 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10583 - Fix a number of small memory leaks identified by coverity. Fixes
10584 bug 26467; bugfix on numerous Tor versions.
10586 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10587 - Move the list of default directory authorities to its own file.
10588 Closes ticket 24854. Patch by "beastr0".
10591 Changes in version 0.3.4.4-rc - 2018-07-09
10592 Tor 0.3.4.4-rc fixes several small compilation, portability, and
10593 correctness issues in previous versions of Tor. This version is a
10594 release candidate: if no serious bugs are found, we expect that the
10595 stable 0.3.4 release will be (almost) the same as this release.
10597 o Minor features (compilation):
10598 - When building Tor, prefer to use Python 3 over Python 2, and more
10599 recent (contemplated) versions over older ones. Closes
10602 o Minor features (geoip):
10603 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10604 Country database. Closes ticket 26674.
10606 o Minor features (Rust, portability):
10607 - Rust cross-compilation is now supported. Closes ticket 25895.
10609 o Minor bugfixes (compilation):
10610 - Fix a compilation warning on some versions of GCC when building
10611 code that calls routerinfo_get_my_routerinfo() twice, assuming
10612 that the second call will succeed if the first one did. Fixes bug
10613 26269; bugfix on 0.2.8.2-alpha.
10615 o Minor bugfixes (control port):
10616 - Report the port correctly when a port is configured to bind to
10617 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10618 - Handle the HSADDRESS= argument to the HSPOST command properly.
10619 (Previously, this argument was misparsed and thus ignored.) Fixes
10620 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10622 o Minor bugfixes (correctness, flow control):
10623 - Upon receiving a stream-level SENDME cell, verify that our window
10624 has not grown too large. Fixes bug 26214; bugfix on svn
10627 o Minor bugfixes (memory, correctness):
10628 - Fix a number of small memory leaks identified by coverity. Fixes
10629 bug 26467; bugfix on numerous Tor versions.
10631 o Minor bugfixes (testing, compatibility):
10632 - When running the hs_ntor_ref.py test, make sure only to pass
10633 strings (rather than "bytes" objects) to the Python subprocess
10634 module. Python 3 on Windows seems to require this. Fixes bug
10635 26535; bugfix on 0.3.1.1-alpha.
10636 - When running the ntor_ref.py test, make sure only to pass strings
10637 (rather than "bytes" objects) to the Python subprocess module.
10638 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10642 Changes in version 0.3.3.8 - 2018-07-09
10643 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
10644 fixes for a memory leak affecting directory authorities.
10646 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
10647 - Stop leaking memory on directory authorities when planning to
10648 vote. This bug was crashing authorities by exhausting their
10649 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10651 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
10652 - Make sure that failing tests in Rust will actually cause the build
10653 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10656 o Minor features (compilation, backport from 0.3.4.4-rc):
10657 - When building Tor, prefer to use Python 3 over Python 2, and more
10658 recent (contemplated) versions over older ones. Closes
10661 o Minor features (geoip):
10662 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10663 Country database. Closes ticket 26674.
10665 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10666 - Add several checks to detect whether Tor relays are uploading
10667 their descriptors without specifying why they regenerated them.
10668 Diagnostic for ticket 25686.
10670 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
10671 - Don't count path selection failures as circuit build failures.
10672 This change should eliminate cases where Tor blames its guard or
10673 the network for situations like insufficient microdescriptors
10674 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10677 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
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, backport from 0.3.4.4-rc):
10684 - Handle the HSADDRESS= argument to the HSPOST command properly.
10685 (Previously, this argument was misparsed and thus ignored.) Fixes
10686 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10688 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10689 - Fix a number of small memory leaks identified by coverity. Fixes
10690 bug 26467; bugfix on numerous Tor versions.
10692 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10693 - Relays now correctly block attempts to re-extend to the previous
10694 relay by Ed25519 identity. Previously they would warn in this
10695 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10698 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
10699 - When shutting down, Tor now clears all the flags in the control.c
10700 module. This should prevent a bug where authentication cookies are
10701 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10703 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10704 - When running the hs_ntor_ref.py test, make sure only to pass
10705 strings (rather than "bytes" objects) to the Python subprocess
10706 module. Python 3 on Windows seems to require this. Fixes bug
10707 26535; bugfix on 0.3.1.1-alpha.
10708 - When running the ntor_ref.py test, make sure only to pass strings
10709 (rather than "bytes" objects) to the Python subprocess module.
10710 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10714 Changes in version 0.3.4.3-alpha - 2018-06-26
10715 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
10716 one that was causing stability issues on directory authorities.
10718 o Major bugfixes (directory authority):
10719 - Stop leaking memory on directory authorities when planning to
10720 vote. This bug was crashing authorities by exhausting their
10721 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10723 o Major bugfixes (rust, testing):
10724 - Make sure that failing tests in Rust will actually cause the build
10725 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10728 o Minor feature (directory authorities):
10729 - Stop warning about incomplete bw lines before the first complete
10730 bw line has been found, so that additional header lines can be
10731 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
10733 o Minor features (relay, diagnostic):
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 features (unit tests):
10739 - Test complete bandwidth measurements files, and test that
10740 incomplete bandwidth lines only give warnings when the end of the
10741 header has not been detected. Fixes bug 25947; bugfix
10744 o Minor bugfixes (compilation):
10745 - Refrain from compiling unit testing related object files when
10746 --disable-unittests is set to configure script. Fixes bug 24891;
10747 bugfix on 0.2.5.1-alpha.
10748 - When linking the libtor_testing.a library, only include the
10749 dirauth object files once. Previously, they were getting added
10750 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
10751 - The --enable-fatal-warnings flag now affects Rust code as well.
10752 Closes ticket 26245.
10754 o Minor bugfixes (onion services):
10755 - Recompute some consensus information after detecting a clock jump,
10756 or after transitioning from a non-live consensus to a live
10757 consensus. We do this to avoid having an outdated state, and
10758 miscalculating the index for next-generation onion services. Fixes
10759 bug 24977; bugfix on 0.3.2.1-alpha.
10761 o Minor bugfixes (relay):
10762 - Relays now correctly block attempts to re-extend to the previous
10763 relay by Ed25519 identity. Previously they would warn in this
10764 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10767 o Minor bugfixes (testing):
10768 - Fix compilation of the doctests in the Rust crypto crate. Fixes
10769 bug 26415; bugfix on 0.3.4.1-alpha.
10770 - Instead of trying to read the geoip configuration files from
10771 within the unit tests, instead create our own ersatz files with
10772 just enough geoip data in the format we expect. Trying to read
10773 from the source directory created problems on Windows with mingw,
10774 where the build system's paths are not the same as the platform's
10775 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
10776 - Refrain from trying to get an item from an empty smartlist in
10777 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
10778 to catch improper smartlist usage. Furthermore, enable
10779 DEBUG_SMARTLIST globally when build is configured with fragile
10780 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
10783 Changes in version 0.3.3.7 - 2018-06-12
10784 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
10785 fixes for bugs affecting compatibility and stability.
10787 o Directory authority changes:
10788 - Add an IPv6 address for the "dannenberg" directory authority.
10789 Closes ticket 26343.
10791 o Minor features (geoip):
10792 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10793 Country database. Closes ticket 26351.
10795 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10796 - Work around a change in OpenSSL 1.1.1 where return values that
10797 would previously indicate "no password" now indicate an empty
10798 password. Without this workaround, Tor instances running with
10799 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10800 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10802 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10803 - Silence unused-const-variable warnings in zstd.h with some GCC
10804 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10806 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
10807 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10808 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10809 miscounting the total number of circuits for these field values.)
10810 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10812 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10813 - Prevent a possible out-of-bounds smartlist read in
10814 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10816 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
10817 - Only select relays when they have the descriptors we prefer to use
10818 for them. This change fixes a bug where we could select a relay
10819 because it had _some_ descriptor, but reject it later with a
10820 nonfatal assertion error because it didn't have the exact one we
10821 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10824 Changes in version 0.3.4.2-alpha - 2018-06-12
10825 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
10826 release, and forward-ports an authority-only security fix from 0.3.3.6.
10828 o Directory authority changes:
10829 - Add an IPv6 address for the "dannenberg" directory authority.
10830 Closes ticket 26343.
10832 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
10833 - Fix a bug that could have allowed an attacker to force a directory
10834 authority to use up all its RAM by passing it a maliciously
10835 crafted protocol versions string. Fixes bug 25517; bugfix on
10836 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10838 o Minor features (continuous integration):
10839 - Add the necessary configuration files for continuous integration
10840 testing on Windows, via the Appveyor platform. Closes ticket
10841 25549. Patches from Marcin Cieślak and Isis Lovecruft.
10843 o Minor features (geoip):
10844 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10845 Country database. Closes ticket 26351.
10847 o Minor bugfixes (compatibility, openssl):
10848 - Work around a change in OpenSSL 1.1.1 where return values that
10849 would previously indicate "no password" now indicate an empty
10850 password. Without this workaround, Tor instances running with
10851 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10852 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10854 o Minor bugfixes (compilation):
10855 - Silence unused-const-variable warnings in zstd.h with some GCC
10856 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10857 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
10858 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
10859 - Avoid a compiler warning when casting the return value of
10860 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
10861 26283; bugfix on 0.2.4.10-alpha.
10863 o Minor bugfixes (control port):
10864 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
10865 CIRC_BW events. Previously, such cells were counted entirely in
10866 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
10869 o Minor bugfixes (controller):
10870 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10871 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10872 miscounting the total number of circuits for these field values.)
10873 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10875 o Minor bugfixes (hardening):
10876 - Prevent a possible out-of-bounds smartlist read in
10877 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10879 o Minor bugfixes (onion services):
10880 - Fix a bug that blocked the creation of ephemeral v3 onion
10881 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
10883 o Minor bugfixes (test coverage tools):
10884 - Update our "cov-diff" script to handle output from the latest
10885 version of gcov, and to remove extraneous timestamp information
10886 from its output. Fixes bugs 26101 and 26102; bugfix
10890 Changes in version 0.3.3.6 - 2018-05-22
10891 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
10892 backports several important fixes from the 0.3.4.1-alpha.
10894 The Tor 0.3.3 series includes controller support and other
10895 improvements for v3 onion services, official support for embedding Tor
10896 within other applications, and our first non-trivial module written in
10897 the Rust programming language. (Rust is still not enabled by default
10898 when building Tor.) And as usual, there are numerous other smaller
10899 bugfixes, features, and improvements.
10901 Below are the changes since 0.3.3.5-rc. For a list of all changes
10902 since 0.3.2.10, see the ReleaseNotes file.
10904 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
10905 - When directory authorities read a zero-byte bandwidth file, they
10906 would previously log a warning with the contents of an
10907 uninitialised buffer. They now log a warning about the empty file
10908 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10910 o Major bugfixes (security, directory authority, denial-of-service):
10911 - Fix a bug that could have allowed an attacker to force a directory
10912 authority to use up all its RAM by passing it a maliciously
10913 crafted protocol versions string. Fixes bug 25517; bugfix on
10914 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10916 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
10917 - Avoid a rare assertion failure in the circuit build timeout code
10918 if we fail to allow any circuits to actually complete. Fixes bug
10919 25733; bugfix on 0.2.2.2-alpha.
10921 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10922 - Avoid a crash when testing router reachability on a router that
10923 could have an ed25519 ID, but which does not. Fixes bug 25415;
10924 bugfix on 0.3.3.2-alpha.
10926 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10927 - Correctly detect when onion services get disabled after HUP. Fixes
10928 bug 25761; bugfix on 0.3.2.1.
10930 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
10931 - Impose a limit on circuit cell queue size. The limit can be
10932 controlled by a consensus parameter. Fixes bug 25226; bugfix
10935 o Minor features (compatibility, backport from 0.3.4.1-alpha):
10936 - Avoid some compilation warnings with recent versions of LibreSSL.
10937 Closes ticket 26006.
10939 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10940 - Our .travis.yml configuration now includes support for testing the
10941 results of "make distcheck". (It's not uncommon for "make check"
10942 to pass but "make distcheck" to fail.) Closes ticket 25814.
10943 - Our Travis CI configuration now integrates with the Coveralls
10944 coverage analysis tool. Closes ticket 25818.
10946 o Minor features (geoip):
10947 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10948 database. Closes ticket 26104.
10950 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10951 - Don't consider Tor running as a client if the ControlPort is open,
10952 but no actual client ports are open. Fixes bug 26062; bugfix
10955 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10956 - Upon receiving a malformed connected cell, stop processing the
10957 cell immediately. Previously we would mark the connection for
10958 close, but continue processing the cell as if the connection were
10959 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10961 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
10962 - Stop saying in the manual that clients cache ipv4 dns answers from
10963 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10964 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
10965 we forgot to say so in the man page. Fixes bug 26052; bugfix
10968 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10969 - Allow the nanosleep() system call, which glibc uses to implement
10970 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10972 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10973 - Fix a memory leak when a v3 onion service is configured and gets a
10974 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10975 - When parsing the descriptor signature, look for the token plus an
10976 extra white-space at the end. This is more correct but also will
10977 allow us to support new fields that might start with "signature".
10978 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10980 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10981 - Avoid a crash when running with DirPort set but ORPort turned off.
10982 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10984 o Documentation (backport from 0.3.4.1-alpha):
10985 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10986 ticket 25857. Patch from "CTassisF".
10989 Changes in version 0.3.4.1-alpha - 2018-05-17
10990 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
10991 includes refactoring to begin reducing Tor's binary size and idle CPU
10992 usage on mobile, along with prep work for new bandwidth scanners,
10993 improvements to the experimental "vanguards" feature, and numerous
10994 other small features and bugfixes.
10996 o New system requirements:
10997 - Tor no longer tries to support old operating systems without
10998 mmap() or some local equivalent. Apparently, compilation on such
10999 systems has been broken for some time, without anybody noticing or
11000 complaining. Closes ticket 25398.
11002 o Major feature (directory authority, modularization):
11003 - The directory authority subsystem has been modularized. The code
11004 is now located in src/or/dirauth/, and is compiled in by default.
11005 To disable the module, the configure option
11006 --disable-module-dirauth has been added. This module may be
11007 disabled by default in some future release. Closes ticket 25610.
11009 o Major features (main loop, CPU usage):
11010 - When Tor is disabled (via DisableNetwork or via hibernation), it
11011 no longer needs to run any per-second events. This change should
11012 make it easier for mobile applications to disable Tor while the
11013 device is sleeping, or Tor is not running. Closes ticket 26063.
11014 - Tor no longer enables all of its periodic events by default.
11015 Previously, Tor would enable all possible main loop events,
11016 regardless of whether it needed them. Furthermore, many of these
11017 events are now disabled with Tor is hibernating or DisableNetwork
11018 is set. This is a big step towards reducing client CPU usage by
11019 reducing the amount of wake-ups the daemon does. Closes ticket
11021 - The bandwidth-limitation logic has been refactored so that
11022 bandwidth calculations are performed on-demand, rather than every
11023 TokenBucketRefillInterval milliseconds. This change should improve
11024 the granularity of our bandwidth calculations, and limit the
11025 number of times that the Tor process needs to wake up when it is
11026 idle. Closes ticket 25373.
11027 - Move responsibility for many operations from a once-per-second
11028 callback to a callback that is only scheduled as needed. Moving
11029 this functionality has allowed us to disable the callback when
11030 Tor's network is disabled. Once enough items are removed from our
11031 once-per-second callback, we can eliminate it entirely to conserve
11032 CPU when idle. The functionality removed includes: closing
11033 connections, circuits, and channels (ticket 25932); consensus
11034 voting (25937); flushing log callbacks (25951); honoring delayed
11035 SIGNEWNYM requests (25949); rescanning the consensus cache
11036 (25931); saving the state file to disk (25948); warning relay
11037 operators about unreachable ports (25952); and keeping track of
11038 Tor's uptime (26009).
11040 o Major bugfixes (directory authorities, security):
11041 - When directory authorities read a zero-byte bandwidth file, they
11042 would previously log a warning with the contents of an
11043 uninitialised buffer. They now log a warning about the empty file
11044 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
11046 o Major bugfixes (crash):
11047 - Avoid a rare assertion failure in the circuit build timeout code
11048 if we fail to allow any circuits to actually complete. Fixes bug
11049 25733; bugfix on 0.2.2.2-alpha.
11051 o Major bugfixes (directory authority):
11052 - Avoid a crash when testing router reachability on a router that
11053 could have an ed25519 ID, but which does not. Fixes bug 25415;
11054 bugfix on 0.3.3.2-alpha.
11056 o Major bugfixes (onion service):
11057 - Correctly detect when onion services get disabled after HUP. Fixes
11058 bug 25761; bugfix on 0.3.2.1.
11060 o Major bugfixes (protover, voting):
11061 - Revise Rust implementation of protover to use a more memory-
11062 efficient voting algorithm and corresponding data structures, thus
11063 avoiding a potential (but small impact) DoS attack where specially
11064 crafted protocol strings would expand to several potential
11065 megabytes in memory. In the process, several portions of code were
11066 revised to be methods on new, custom types, rather than functions
11067 taking interchangeable types, thus increasing type safety of the
11068 module. Custom error types and handling were added as well, in
11069 order to facilitate better error dismissal/handling in outside
11070 crates and avoid mistakenly passing an internal error string to C
11071 over the FFI boundary. Many tests were added, and some previous
11072 differences between the C and Rust implementations have been
11073 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11075 o Major bugfixes (relay, denial of service):
11076 - Impose a limit on circuit cell queue size. The limit can be
11077 controlled by a consensus parameter. Fixes bug 25226; bugfix
11080 o Minor features (accounting):
11081 - When Tor becomes dormant, it now uses a scheduled event to wake up
11082 at the right time. Previously, we would use the per-second timer
11083 to check whether to wake up, but we no longer have any per-second
11084 timers enabled when the network is disabled. Closes ticket 26064.
11086 o Minor features (code quality):
11087 - Add optional spell-checking for the Tor codebase, using the
11088 "misspell" program. To use this feature, run "make check-typos".
11089 Closes ticket 25024.
11091 o Minor features (compatibility):
11092 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
11093 the no-deprecated option, and builds correctly with them. Closes
11094 tickets 19429, 19981, and 25353.
11095 - Avoid some compilation warnings with recent versions of LibreSSL.
11096 Closes ticket 26006.
11098 o Minor features (compression, zstd):
11099 - When running with zstd, Tor now considers using advanced functions
11100 that the zstd maintainers have labeled as potentially unstable. To
11101 prevent breakage, Tor will only use this functionality when the
11102 runtime version of the zstd library matches the version with which
11103 Tor was compiled. Closes ticket 25162.
11105 o Minor features (configuration):
11106 - The "DownloadSchedule" options have been renamed to end with
11107 "DownloadInitialDelay". The old names are still allowed, but will
11108 produce a warning. Comma-separated lists are still permitted for
11109 these options, but all values after the first are ignored (as they
11110 have been since 0.2.9). Closes ticket 23354.
11112 o Minor features (continuous integration):
11113 - Our .travis.yml configuration now includes support for testing the
11114 results of "make distcheck". (It's not uncommon for "make check"
11115 to pass but "make distcheck" to fail.) Closes ticket 25814.
11116 - Our Travis CI configuration now integrates with the Coveralls
11117 coverage analysis tool. Closes ticket 25818.
11119 o Minor features (control port):
11120 - Introduce GETINFO "current-time/{local,utc}" to return the local
11121 and UTC times respectively in ISO format. This helps a controller
11122 like Tor Browser detect a time-related error. Closes ticket 25511.
11123 Patch by Neel Chauhan.
11124 - Introduce new fields to the CIRC_BW event. There are two new
11125 fields in each of the read and written directions. The DELIVERED
11126 fields report the total valid data on the circuit, as measured by
11127 the payload sizes of verified and error-checked relay command
11128 cells. The OVERHEAD fields report the total unused bytes in each
11129 of these cells. Closes ticket 25903.
11131 o Minor features (directory authority):
11132 - Directory authorities now open their key-pinning files as O_SYNC,
11133 to limit their chances of accidentally writing partial lines.
11134 Closes ticket 23909.
11136 o Minor features (directory authority, forward compatibility):
11137 - Make the lines of the measured bandwidth file able to contain
11138 their entries in any order. Previously, the node_id entry needed
11139 to come first. Closes ticket 26004.
11141 o Minor features (entry guards):
11142 - Introduce a new torrc option NumPrimaryGuards for controlling the
11143 number of primary guards. Closes ticket 25843.
11145 o Minor features (geoip):
11146 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
11147 database. Closes ticket 26104.
11149 o Minor features (performance):
11150 - Avoid a needless call to malloc() when processing an incoming
11151 relay cell. Closes ticket 24914.
11152 - Make our timing-wheel code run a tiny bit faster on 32-bit
11153 platforms, by preferring 32-bit math to 64-bit. Closes
11155 - Avoid a needless malloc()/free() pair every time we handle an ntor
11156 handshake. Closes ticket 25150.
11158 o Minor features (testing):
11159 - Add a unit test for voting_schedule_get_start_of_next_interval().
11160 Closes ticket 26014, and helps make unit test coverage
11161 more deterministic.
11162 - A new unittests module specifically for testing the functions in
11163 the (new-ish) bridges.c module has been created with new
11164 unittests, raising the code coverage percentages. Closes 25425.
11165 - We now have improved testing for addressmap_get_virtual_address()
11166 function. This should improve our test coverage, and make our test
11167 coverage more deterministic. Closes ticket 25993.
11169 o Minor features (timekeeping, circuit scheduling):
11170 - When keeping track of how busy each circuit have been recently on
11171 a given connection, use coarse-grained monotonic timers rather
11172 than gettimeofday(). This change should marginally increase
11173 accuracy and performance. Implements part of ticket 25927.
11175 o Minor bugfixes (bandwidth management):
11176 - Consider ourselves "low on write bandwidth" if we have exhausted
11177 our write bandwidth some time in the last second. This was the
11178 documented behavior before, but the actual behavior was to change
11179 this value every TokenBucketRefillInterval. Fixes bug 25828;
11180 bugfix on 0.2.3.5-alpha.
11182 o Minor bugfixes (C correctness):
11183 - Add a missing lock acquisition in the shutdown code of the control
11184 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
11185 Coverity; this is CID 1433643.
11187 o Minor bugfixes (circuit path selection):
11188 - Don't count path selection failures as circuit build failures.
11189 This change should eliminate cases where Tor blames its guard or
11190 the network for situations like insufficient microdescriptors
11191 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
11194 o Minor bugfixes (client):
11195 - Don't consider Tor running as a client if the ControlPort is open,
11196 but no actual client ports are open. Fixes bug 26062; bugfix
11199 o Minor bugfixes (code style):
11200 - Fixed multiple includes of transports.h in src/or/connection.c
11201 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
11202 - Remove the unused variable n_possible from the function
11203 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
11205 o Minor bugfixes (control interface):
11206 - Respond with more human-readable error messages to GETINFO exit-
11207 policy/* requests. Also, let controller know if an error is
11208 transient (response code 551) or not (response code 552). Fixes
11209 bug 25852; bugfix on 0.2.8.1-alpha.
11211 o Minor bugfixes (controller):
11212 - Make CIRC_BW event reflect the total of all data sent on a
11213 circuit, including padding and dropped cells. Also fix a mis-
11214 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
11215 bugfix on 0.2.5.2-alpha.
11217 o Minor bugfixes (correctness, client):
11218 - Upon receiving a malformed connected cell, stop processing the cell
11219 immediately. Previously we would mark the connection for close, but
11220 continue processing the cell as if the connection were open. Fixes bug
11221 26072; bugfix on 0.2.4.7-alpha.
11223 o Minor bugfixes (directory client):
11224 - When unverified-consensus is verified, rename it to cached-
11225 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
11226 - Fixed launching a certificate fetch always during the scheduled
11227 periodic consensus fetch by fetching only in those cases when
11228 consensus are waiting for certs. Fixes bug 24740; bugfix
11231 o Minor bugfixes (documentation):
11232 - Stop saying in the manual that clients cache ipv4 dns answers from
11233 exit relays. We haven't used them since 0.2.6.3-alpha, and in
11234 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11235 we forgot to say so in the man page. Fixes bug 26052; bugfix
11238 o Minor bugfixes (error reporting):
11239 - Improve tolerance for directory authorities with skewed clocks.
11240 Previously, an authority with a clock more than 60 seconds ahead
11241 could cause a client with a correct clock to warn that the
11242 client's clock was behind. Now the clocks of a majority of
11243 directory authorities have to be ahead of the client before this
11244 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11246 o Minor bugfixes (Linux seccomp2 sandbox):
11247 - Allow the nanosleep() system call, which glibc uses to implement
11248 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11250 o Minor bugfixes (onion service):
11251 - Fix a memory leak when a v3 onion service is configured and gets a
11252 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11253 - When parsing the descriptor signature, look for the token plus an
11254 extra white-space at the end. This is more correct but also will
11255 allow us to support new fields that might start with "signature".
11256 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11258 o Minor bugfixes (path selection):
11259 - Only select relays when they have the descriptors we prefer to use
11260 for them. This change fixes a bug where we could select a relay
11261 because it had _some_ descriptor, but reject it later with a
11262 nonfatal assertion error because it didn't have the exact one we
11263 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11265 o Minor bugfixes (portability):
11266 - Do not align mmap length, as it is not required by POSIX, and the
11267 getpagesize function is deprecated. Fixes bug 25399; bugfix
11270 o Minor bugfixes (portability, FreeBSD):
11271 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11272 does not stringify on FreeBSD, so we switch to tor_asprintf().
11273 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11275 o Minor bugfixes (relay statistics):
11276 - When a relay is collecting internal statistics about how many
11277 create cell requests it has seen of each type, accurately count
11278 the requests from relays that temporarily fall out of the
11279 consensus. (To be extra conservative, we were already ignoring
11280 requests from clients in our counts, and we continue ignoring them
11281 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11283 o Minor bugfixes (relay, crash):
11284 - Avoid a crash when running with DirPort set but ORPort turned off.
11285 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11287 o Minor bugfixes (restart-in-process):
11288 - When shutting down, Tor now clears all the flags in the control.c
11289 module. This should prevent a bug where authentication cookies are
11290 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11292 o Minor bugfixes (testing):
11293 - When testing workqueue event-cancellation, make sure that we
11294 actually cancel an event, and that cancel each event with equal
11295 probability. (It was previously possible, though extremely
11296 unlikely, for our event-canceling test not to cancel any events.)
11297 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11298 - Repeat part of the test in test_client_pick_intro() a number of
11299 times, to give it consistent coverage. Fixes bug 25996; bugfix
11301 - Remove randomness from the hs_common/responsible_hsdirs test, so
11302 that it always takes the same path through the function it tests.
11303 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11304 - Change the behavior of the "channel/outbound" test so that it
11305 never causes a 10-second rollover for the EWMA circuitmux code.
11306 Previously, this behavior would happen randomly, and result in
11307 fluctuating test coverage. Fixes bug 25994; bugfix
11309 - Use X509_new() to allocate certificates that will be freed later
11310 with X509_free(). Previously, some parts of the unit tests had
11311 used tor_malloc_zero(), which is incorrect, and which caused test
11312 failures on Windows when they were built with extra hardening.
11313 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11315 - While running the circuit_timeout test, fix the PRNG to a
11316 deterministic AES stream, so that the test coverage from this test
11317 will itself be deterministic. Fixes bug 25995; bugfix
11320 o Minor bugfixes (vanguards):
11321 - Allow the last hop in a vanguard circuit to be the same as our
11322 first, to prevent the adversary from influencing guard node choice
11323 by choice of last hop. Also prevent the creation of A - B - A
11324 paths, or A - A paths, which are forbidden by relays. Fixes bug
11325 25870; bugfix on 0.3.3.1-alpha.
11327 o Code simplification and refactoring:
11328 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11329 their functionalities into a single function. Fixes bug 6236;
11330 bugfix on 0.2.3.6-alpha.
11331 - We remove the PortForwarding and PortForwardingHelper options,
11332 related functions, and the port_forwarding tests. These options
11333 were used by the now-deprecated Vidalia to help ordinary users
11334 become Tor relays or bridges. Closes ticket 25409. Patch by
11336 - In order to make the OR and dir checking function in router.c less
11337 confusing we renamed some functions and
11338 consider_testing_reachability() has been split into
11339 router_should_check_reachability() and
11340 router_do_reachability_checks(). Also we improved the documentation
11341 in some functions. Closes ticket 18918.
11342 - Initial work to isolate Libevent usage to a handful of modules in
11343 our codebase, to simplify our call structure, and so that we can
11344 more easily change event loops in the future if needed. Closes
11346 - Introduce a function to call getsockname() and return tor_addr_t,
11347 to save a little complexity throughout the codebase. Closes
11349 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11350 as hsdir_index is always present. Also, we move hsdir_index_t into
11351 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11352 - Merge functions used for describing nodes and suppress the
11353 functions that do not allocate memory for the output buffer
11354 string. NODE_DESC_BUF_LEN constant and format_node_description()
11355 function cannot be used externally from router.c module anymore.
11356 Closes ticket 25432. Patch by valentecaio.
11357 - Our main loop has been simplified so that all important operations
11358 happen inside events. Previously, some operations had to happen
11359 outside the event loop, to prevent infinite sequences of event
11360 activations. Closes ticket 25374.
11361 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11362 it in register_intro_circ() and service_intro_point_new(). This
11363 prevents the digest from being re-calculated each time. Closes
11364 ticket 23107. Patch by Neel Chauhan.
11365 - Refactor token-bucket implementations to use a common backend.
11366 Closes ticket 25766.
11367 - Remove extern declaration of stats_n_seconds_working variable from
11368 main, protecting its accesses with get_uptime() and reset_uptime()
11369 functions. Closes ticket 25081, patch by “valentecaio”.
11370 - Remove our previous logic for "cached gettimeofday()" -- our
11371 coarse monotonic timers are fast enough for this purpose, and far
11372 less error-prone. Implements part of ticket 25927.
11373 - Remove the return value for fascist_firewall_choose_address_base(),
11374 and sister functions such as fascist_firewall_choose_address_node()
11375 and fascist_firewall_choose_address_rs(). Also, while we're here,
11376 initialize the ap argument as leaving it uninitialized can pose a
11377 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11378 - Rename two fields of connection_t struct. timestamp_lastwritten is
11379 renamed to timestamp_last_write_allowed and timestamp_lastread is
11380 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11382 - Since Tor requires C99, remove our old workaround code for libc
11383 implementations where free(NULL) doesn't work. Closes ticket 24484.
11384 - Use our standard rate-limiting code to deal with excessive
11385 libevent failures, rather than the hand-rolled logic we had
11386 before. Closes ticket 26016.
11387 - We remove the return value of node_get_prim_orport() and
11388 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11389 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11390 check for a null address. Closes ticket 23873. Patch by
11392 - We switch to should_record_bridge_info() in
11393 geoip_note_client_seen() and options_need_geoip_info() instead of
11394 accessing the configuration values directly. Fixes bug 25290;
11395 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11397 o Deprecated features:
11398 - As we are not recommending 0.2.5 anymore, we require relays that
11399 once had an ed25519 key associated with their RSA key to always
11400 have that key, instead of allowing them to drop back to a version
11401 that didn't support ed25519. This means they need to use a new RSA
11402 key if they want to downgrade to an older version of tor without
11403 ed25519. Closes ticket 20522.
11406 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11407 ticket 25857. Patch from "CTassisF".
11409 o Removed features:
11410 - Directory authorities will no longer support voting according to
11411 any consensus method before consensus method 25. This keeps
11412 authorities compatible with all authorities running 0.2.9.8 and
11413 later, and does not break any clients or relays. Implements ticket
11414 24378 and proposal 290.
11415 - The PortForwarding and PortForwardingHelper features have been
11416 removed. The reasoning is, given that implementations of NAT
11417 traversal protocols within common consumer grade routers are
11418 frequently buggy, and that the target audience for a NAT punching
11419 feature is a perhaps less-technically-inclined relay operator,
11420 when the helper fails to setup traversal the problems are usually
11421 deep, ugly, and very router specific, making them horrendously
11422 impossible for technical support to reliable assist with, and thus
11423 resulting in frustration all around. Unfortunately, relay
11424 operators who would like to run relays behind NATs will need to
11425 become more familiar with the port forwarding configurations on
11426 their local router. Closes 25409.
11427 - The TestingEnableTbEmptyEvent option has been removed. It was used
11428 in testing simulations to measure how often connection buckets
11429 were emptied, in order to improve our scheduling, but it has not
11430 been actively used in years. Closes ticket 25760.
11431 - The old "round-robin" circuit multiplexer (circuitmux)
11432 implementation has been removed, along with a fairly large set of
11433 code that existed to support it. It has not been the default
11434 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11435 but it still required an unreasonable amount of memory and CPU.
11436 Closes ticket 25268.
11439 Changes in version 0.3.3.5-rc - 2018-04-15
11440 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11441 including some that could affect reliability or correctness.
11443 This is the first release candidate in the 0.3.3 series. If we find no
11444 new bugs or regression here, then the first stable 0.3.3 release will
11445 be nearly identical to this one.
11447 o Major bugfixes (security, protover, voting):
11448 - Revise Rust implementation of protover to use a more memory-
11449 efficient voting algorithm and corresponding data structures, thus
11450 avoiding a potential memory-based DoS attack where specially
11451 crafted protocol strings would expand to fill available memory.
11452 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11454 o Major bugfixes (performance, load balancing):
11455 - Directory authorities no longer vote in favor of the Guard flag
11456 for relays without directory support. Starting in Tor
11457 0.3.0.1-alpha, clients have been avoiding using such relays in the
11458 Guard position, leading to increasingly broken load balancing for
11459 the 5%-or-so of Guards that don't advertise directory support.
11460 Fixes bug 22310; bugfix on 0.3.0.6.
11462 o Minor feature (continuous integration):
11463 - Update the Travis CI configuration to use the stable Rust channel,
11464 now that we have decided to require that. Closes ticket 25714.
11466 o Minor features (config options):
11467 - Change the way the default value for MaxMemInQueues is calculated.
11468 We now use 40% of the hardware RAM if the system has 8 GB RAM or
11469 more. Otherwise we use the former value of 75%. Closes
11472 o Minor features (geoip):
11473 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
11474 Country database. Closes ticket 25718.
11476 o Minor bugfixes (client):
11477 - When using a listed relay as a bridge, and also using
11478 microdescriptors, and considering that relay as a non-bridge in a
11479 circuit, treat its microdescriptor as a valid source of
11480 information about that relay. This change should prevent a non-
11481 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
11483 o Minor bugfixes (controller):
11484 - Restore the correct operation of the RESOLVE command, which had
11485 been broken since we added the ability to enable/disable DNS on
11486 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
11488 o Minor bugfixes (distribution, compilation, rust):
11489 - Build correctly when the rust dependencies submodule is loaded,
11490 but the TOR_RUST_DEPENDENCIES environment variable is not set.
11491 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
11492 - Actually include all of our Rust source in our source
11493 distributions. (Previously, a few of the files were accidentally
11494 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
11496 o Minor bugfixes (documentation):
11497 - Document that the PerConnBW{Rate,Burst} options will fall back to
11498 their corresponding consensus parameters only if those parameters
11499 are set. Previously we had claimed that these values would always
11500 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
11501 - Revert a misformatting issue in the ExitPolicy documentation.
11502 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
11504 o Minor bugfixes (exit relay DNS retries):
11505 - Re-attempt timed-out DNS queries 3 times before failure, since our
11506 timeout is 5 seconds for them, but clients wait 10-15. Also allow
11507 slightly more timeouts per resolver when an exit has multiple
11508 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
11510 o Minor bugfixes (onion services):
11511 - Re-instate counting the client HSDir fetch circuits against the
11512 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
11514 - Remove underscores from the _HSLayer{2,3}Nodes options. This
11515 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
11516 Fixes bug 25581; bugfix on 0.3.3.1-alpha
11518 o Code simplification and refactoring:
11519 - Move the list of default directory authorities to its own file.
11520 Closes ticket 24854. Patch by "beastr0".
11522 o Documentation (manpage, denial of service):
11523 - Provide more detail about the denial-of-service options, by
11524 listing each mitigation and explaining how they relate. Closes
11528 Changes in version 0.3.3.4-alpha - 2018-03-29
11529 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
11530 the alpha testing of earlier releases in its series. We are
11531 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
11533 o New system requirements:
11534 - When built with Rust, Tor now depends on version 0.2.39 of the
11535 libc crate. Closes tickets 25310 and 25664.
11537 o Major bugfixes (relay, connection):
11538 - If we have failed to connect to a relay and received a connection
11539 refused, timeout, or similar error (at the TCP level), do not try
11540 that same address/port again for 60 seconds after the failure has
11541 occurred. Fixes bug 24767; bugfix on 0.0.6.
11543 o Minor features (geoip):
11544 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
11545 Country database. Closes ticket 25469.
11547 o Minor features (log messages):
11548 - Improve log message in the out-of-memory handler to include
11549 information about memory usage from the different compression
11550 backends. Closes ticket 25372.
11552 o Minor features (sandbox):
11553 - Explicitly permit the poll() system call when the Linux
11554 seccomp2-based sandbox is enabled: apparently, some versions of
11555 libc use poll() when calling getpwnam(). Closes ticket 25313.
11557 o Minor bugfixes (C correctness):
11558 - Fix a very unlikely (impossible, we believe) null pointer
11559 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11560 Coverity; this is CID 1430932.
11562 o Minor bugfixes (channel, client):
11563 - Better identify client connection when reporting to the geoip
11564 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11566 o Minor bugfixes (compilation):
11567 - Fix a C99 compliance issue in our configuration script that caused
11568 compilation issues when compiling Tor with certain versions of
11569 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11571 o Minor bugfixes (controller, reliability):
11572 - Avoid a (nonfatal) assertion failure when extending a one-hop
11573 circuit from the controller to become a multihop circuit. Fixes
11574 bug 24903; bugfix on 0.2.5.2-alpha.
11576 o Major bugfixes (networking):
11577 - Tor will no longer reject IPv6 address strings from Tor Browser
11578 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11579 25036, bugfix on Tor 0.3.1.2.
11581 o Minor bugfixes (networking):
11582 - string_is_valid_hostname() will not consider IP strings to be
11583 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
11585 o Minor bugfixes (onion service v3):
11586 - Avoid an assertion failure when the next onion service
11587 descriptor rotation type is out of sync with the consensus's
11588 valid-after time. Instead, log a warning message with extra
11589 information, so we can better hunt down the cause of this
11590 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
11592 o Minor bugfixes (testing):
11593 - Avoid intermittent test failures due to a test that had relied on
11594 onion service introduction point creation finishing within 5
11595 seconds of real clock time. Fixes bug 25450; bugfix
11597 - Rust crates are now automatically detected and tested. Previously,
11598 some crates were not tested by `make test-rust` due to a static
11599 string in the `src/test/test_rust.sh` script specifying which
11600 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
11602 o Minor bugfixes (testing, benchmarks):
11603 - Fix a crash when running benchmark tests on win32 systems. The
11604 crash was due to a mutex that wasn't initialized before logging
11605 and options were initialized. Fixes bug 25479; bugfix
11608 o Minor bugfixes (warnings, ipv6):
11609 - Avoid a bug warning that could occur when trying to connect to a
11610 relay over IPv6. This warning would occur on a Tor instance that
11611 downloads router descriptors, but prefers to use microdescriptors.
11612 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
11614 o Code simplification and refactoring:
11615 - Remove the old (deterministic) directory retry logic entirely:
11616 We've used exponential backoff exclusively for some time. Closes
11620 - Improved the documentation of AccountingStart parameter. Closes
11622 - Update the documentation for "Log" to include the current list of
11623 logging domains. Closes ticket 25378.
11626 Changes in version 0.3.1.10 - 2018-03-03
11627 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
11630 It includes an important security fix for a remote crash attack
11631 against directory authorities, tracked as TROVE-2018-001.
11633 This release also backports our new system for improved resistance to
11634 denial-of-service attacks against relays.
11636 This release also fixes several minor bugs and annoyances from
11639 All directory authorities should upgrade to one of the versions
11640 released today. Relays running 0.3.1.x may wish to update to one of
11641 the versions released today, for the DoS mitigations.
11643 Please note: according to our release calendar, Tor 0.3.1 will no
11644 longer be supported after 1 July 2018. If you will be running Tor
11645 after that date, you should make sure to plan to upgrade to the latest
11646 stable version, or downgrade to 0.2.9 (which will receive long-term
11649 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11650 - Fix a protocol-list handling bug that could be used to remotely crash
11651 directory authorities with a null-pointer exception. Fixes bug 25074;
11652 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11655 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11656 - Give relays some defenses against the recent network overload. We
11657 start with three defenses (default parameters in parentheses).
11658 First: if a single client address makes too many concurrent
11659 connections (>100), hang up on further connections. Second: if a
11660 single client address makes circuits too quickly (more than 3 per
11661 second, with an allowed burst of 90) while also having too many
11662 connections open (3), refuse new create cells for the next while
11663 (1-2 hours). Third: if a client asks to establish a rendezvous
11664 point to you directly, ignore the request. These defenses can be
11665 manually controlled by new torrc options, but relays will also
11666 take guidance from consensus parameters, so there's no need to
11667 configure anything manually. Implements ticket 24902.
11669 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11670 - Update the sandbox rules so that they should now work correctly
11671 with Glibc 2.26. Closes ticket 24315.
11673 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11674 - Fix an "off by 2" error in counting rendezvous failures on the
11675 onion service side. While we thought we would stop the rendezvous
11676 attempt after one failed circuit, we were actually making three
11677 circuit attempts before giving up. Now switch to a default of 2,
11678 and allow the consensus parameter "hs_service_max_rdv_failures" to
11679 override. Fixes bug 24895; bugfix on 0.0.6.
11681 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11682 - Add Link protocol version 5 to the supported protocols list. Fixes
11683 bug 25070; bugfix on 0.3.1.1-alpha.
11685 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11686 - Fix a set of false positives where relays would consider
11687 connections to other relays as being client-only connections (and
11688 thus e.g. deserving different link padding schemes) if those
11689 relays fell out of the consensus briefly. Now we look only at the
11690 initial handshake and whether the connection authenticated as a
11691 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11693 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11694 - Make our OOM handler aware of the geoip client history cache so it
11695 doesn't fill up the memory. This check is important for IPv6 and
11696 our DoS mitigation subsystem. Closes ticket 25122.
11698 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
11699 - Change relay bandwidth reporting stats interval from 4 hours to 24
11700 hours in order to reduce the efficiency of guard discovery
11701 attacks. Fixes ticket 23856.
11703 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11704 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11705 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11706 since they neither disabled TLS 1.3 nor enabled any of the
11707 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11708 Closes ticket 24978.
11710 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
11711 - The fallback directory list has been re-generated based on the
11712 current status of the network. Tor uses fallback directories to
11713 bootstrap when it doesn't yet have up-to-date directory
11714 information. Closes ticket 24801.
11715 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11716 prefer to bootstrap from fallback directory mirrors. This is a
11717 follow-up to 24679, which removed weights from the default
11718 fallbacks. Implements ticket 24681.
11720 o Minor features (geoip):
11721 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11724 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11725 - Use the actual observed address of an incoming relay connection,
11726 not the canonical address of the relay from its descriptor, when
11727 making decisions about how to handle the incoming connection.
11728 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11730 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11731 - Directory authorities, when refusing a descriptor from a rejected
11732 relay, now explicitly tell the relay (in its logs) to set a valid
11733 ContactInfo address and contact the bad-relays@ mailing list.
11734 Fixes bug 25170; bugfix on 0.2.9.1.
11736 o Minor bugfixes (address selection, backport from 0.3.2.9):
11737 - When the fascist_firewall_choose_address_ functions don't find a
11738 reachable address, set the returned address to the null address
11739 and port. This is a precautionary measure, because some callers do
11740 not check the return value. Fixes bug 24736; bugfix
11743 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
11744 - Fetch descriptors aggressively whenever we lack enough to build
11745 circuits, regardless of how many descriptors we are missing.
11746 Previously, we would delay launching the fetch when we had fewer
11747 than 15 missing descriptors, even if some of those descriptors
11748 were blocking circuits from building. Fixes bug 23985; bugfix on
11749 0.1.1.11-alpha. The effects of this bug became worse in
11750 0.3.0.3-alpha, when we began treating missing descriptors from our
11751 primary guards as a reason to delay circuits.
11752 - Don't try fetching microdescriptors from relays that have failed
11753 to deliver them in the past. Fixes bug 23817; bugfix
11756 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
11757 - Fix a signed/unsigned comparison warning introduced by our fix to
11758 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11760 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11761 - Avoid a crash when attempting to use the seccomp2 sandbox together
11762 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11765 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11766 - Fix a possible crash on malformed consensus. If a consensus had
11767 contained an unparseable protocol line, it could have made clients
11768 and relays crash with a null-pointer exception. To exploit this
11769 issue, however, an attacker would need to be able to subvert the
11770 directory authority system. Fixes bug 25251; bugfix on
11771 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11773 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
11774 - Recover better from empty or corrupt files in the consensus cache
11775 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11776 - When a consensus diff calculation is only partially successful,
11777 only record the successful parts as having succeeded. Partial
11778 success can happen if (for example) one compression method fails
11779 but the others succeed. Previously we misrecorded all the
11780 calculations as having succeeded, which would later cause a
11781 nonfatal assertion failure. Fixes bug 24086; bugfix
11784 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
11785 - Tor now updates its guard state when it reads a consensus
11786 regardless of whether it's missing descriptors. That makes tor use
11787 its primary guards to fetch descriptors in some edge cases where
11788 it would previously have used fallback directories. Fixes bug
11789 23862; bugfix on 0.3.0.1-alpha.
11791 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11792 - Don't treat inability to store a cached consensus object as a bug:
11793 it can happen normally when we are out of disk space. Fixes bug
11794 24859; bugfix on 0.3.1.1-alpha.
11796 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
11797 - When queuing DESTROY cells on a channel, only queue the circuit-id
11798 and reason fields: not the entire 514-byte cell. This fix should
11799 help mitigate any bugs or attacks that fill up these queues, and
11800 free more RAM for other uses. Fixes bug 24666; bugfix
11803 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
11804 - When closing a connection via close_connection_immediately(), we
11805 mark it as "not blocked on bandwidth", to prevent later calls from
11806 trying to unblock it, and give it permission to read. This fixes a
11807 backtrace warning that can happen on relays under various
11808 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11810 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
11811 - When selecting relays by bandwidth, avoid a rounding error that
11812 could sometimes cause load to be imbalanced incorrectly.
11813 Previously, we would always round upwards; now, we round towards
11814 the nearest integer. This had the biggest effect when a relay's
11815 weight adjustments should have given it weight 0, but it got
11816 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11817 - When calculating the fraction of nodes that have descriptors, and
11818 all nodes in the network have zero bandwidths, count the number of
11819 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11820 - Actually log the total bandwidth in compute_weighted_bandwidths().
11821 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11823 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11824 - Improve the performance of our consensus-diff application code
11825 when Tor is built with the --enable-fragile-hardening option set.
11826 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11828 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11829 - Don't exit the Tor process if setrlimit() fails to change the file
11830 limit (which can happen sometimes on some versions of OSX). Fixes
11831 bug 21074; bugfix on 0.0.9pre5.
11833 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
11834 - Fix a bug in the bit-counting parts of our timing-wheel code on
11835 MSVC. (Note that MSVC is still not a supported build platform, due
11836 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
11839 o Minor bugfixes (relay, partial backport):
11840 - Make the internal channel_is_client() function look at what sort
11841 of connection handshake the other side used, rather than whether
11842 the other side ever sent a create_fast cell to us. Backports part
11843 of the fixes from bugs 22805 and 24898.
11845 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11846 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11848 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11849 bugfix on 0.2.9.4-alpha.
11851 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11852 - Update the "rust dependencies" submodule to be a project-level
11853 repository, rather than a user repository. Closes ticket 25323.
11856 Changes in version 0.2.9.15 - 2018-03-03
11857 Tor 0.2.9.15 backports important security and stability bugfixes from
11858 later Tor releases.
11860 It includes an important security fix for a remote crash attack
11861 against directory authorities, tracked as TROVE-2018-001.
11863 This release also backports our new system for improved resistance to
11864 denial-of-service attacks against relays.
11866 This release also fixes several minor bugs and annoyances from
11869 All directory authorities should upgrade to one of the versions
11870 released today. Relays running 0.2.9.x may wish to update to one of
11871 the versions released today, for the DoS mitigations.
11873 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11874 - Fix a protocol-list handling bug that could be used to remotely crash
11875 directory authorities with a null-pointer exception. Fixes bug 25074;
11876 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11879 o Major features (denial-of-service mitigation):
11880 - Give relays some defenses against the recent network overload. We
11881 start with three defenses (default parameters in parentheses).
11882 First: if a single client address makes too many concurrent
11883 connections (>100), hang up on further connections. Second: if a
11884 single client address makes circuits too quickly (more than 3 per
11885 second, with an allowed burst of 90) while also having too many
11886 connections open (3), refuse new create cells for the next while
11887 (1-2 hours). Third: if a client asks to establish a rendezvous
11888 point to you directly, ignore the request. These defenses can be
11889 manually controlled by new torrc options, but relays will also
11890 take guidance from consensus parameters, so there's no need to
11891 configure anything manually. Implements ticket 24902.
11893 o Major bugfixes (bootstrapping):
11894 - Fetch descriptors aggressively whenever we lack enough to build
11895 circuits, regardless of how many descriptors we are missing.
11896 Previously, we would delay launching the fetch when we had fewer
11897 than 15 missing descriptors, even if some of those descriptors
11898 were blocking circuits from building. Fixes bug 23985; bugfix on
11899 0.1.1.11-alpha. The effects of this bug became worse in
11900 0.3.0.3-alpha, when we began treating missing descriptors from our
11901 primary guards as a reason to delay circuits.
11903 o Major bugfixes (onion services, retry behavior):
11904 - Fix an "off by 2" error in counting rendezvous failures on the
11905 onion service side. While we thought we would stop the rendezvous
11906 attempt after one failed circuit, we were actually making three
11907 circuit attempts before giving up. Now switch to a default of 2,
11908 and allow the consensus parameter "hs_service_max_rdv_failures" to
11909 override. Fixes bug 24895; bugfix on 0.0.6.
11911 o Minor feature (relay statistics):
11912 - Change relay bandwidth reporting stats interval from 4 hours to 24
11913 hours in order to reduce the efficiency of guard discovery
11914 attacks. Fixes ticket 23856.
11916 o Minor features (compatibility, OpenSSL):
11917 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11918 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11919 since they neither disabled TLS 1.3 nor enabled any of the
11920 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11921 Closes ticket 24978.
11923 o Minor features (denial-of-service avoidance):
11924 - Make our OOM handler aware of the geoip client history cache so it
11925 doesn't fill up the memory. This check is important for IPv6 and
11926 our DoS mitigation subsystem. Closes ticket 25122.
11928 o Minor features (fallback directory mirrors):
11929 - The fallback directory list has been re-generated based on the
11930 current status of the network. Tor uses fallback directories to
11931 bootstrap when it doesn't yet have up-to-date directory
11932 information. Closes ticket 24801.
11933 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11934 prefer to bootstrap from fallback directory mirrors. This is a
11935 follow-up to 24679, which removed weights from the default
11936 fallbacks. Implements ticket 24681.
11938 o Minor features (geoip):
11939 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11942 o Minor features (linux seccomp2 sandbox):
11943 - Update the sandbox rules so that they should now work correctly
11944 with Glibc 2.26. Closes ticket 24315.
11946 o Minor bugfix (channel connection):
11947 - Use the actual observed address of an incoming relay connection,
11948 not the canonical address of the relay from its descriptor, when
11949 making decisions about how to handle the incoming connection.
11950 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11952 o Minor bugfix (directory authority):
11953 - Directory authorities, when refusing a descriptor from a rejected
11954 relay, now explicitly tell the relay (in its logs) to set a valid
11955 ContactInfo address and contact the bad-relays@ mailing list.
11956 Fixes bug 25170; bugfix on 0.2.9.1.
11958 o Minor bugfixes (address selection):
11959 - When the fascist_firewall_choose_address_ functions don't find a
11960 reachable address, set the returned address to the null address
11961 and port. This is a precautionary measure, because some callers do
11962 not check the return value. Fixes bug 24736; bugfix
11965 o Minor bugfixes (compilation):
11966 - Fix a signed/unsigned comparison warning introduced by our fix to
11967 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11969 o Minor bugfixes (control port, linux seccomp2 sandbox):
11970 - Avoid a crash when attempting to use the seccomp2 sandbox together
11971 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11974 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11975 - Fix a possible crash on malformed consensus. If a consensus had
11976 contained an unparseable protocol line, it could have made clients
11977 and relays crash with a null-pointer exception. To exploit this
11978 issue, however, an attacker would need to be able to subvert the
11979 directory authority system. Fixes bug 25251; bugfix on
11980 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11982 o Minor bugfixes (memory usage):
11983 - When queuing DESTROY cells on a channel, only queue the circuit-id
11984 and reason fields: not the entire 514-byte cell. This fix should
11985 help mitigate any bugs or attacks that fill up these queues, and
11986 free more RAM for other uses. Fixes bug 24666; bugfix
11989 o Minor bugfixes (network layer):
11990 - When closing a connection via close_connection_immediately(), we
11991 mark it as "not blocked on bandwidth", to prevent later calls from
11992 trying to unblock it, and give it permission to read. This fixes a
11993 backtrace warning that can happen on relays under various
11994 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11996 o Minor bugfixes (OSX):
11997 - Don't exit the Tor process if setrlimit() fails to change the file
11998 limit (which can happen sometimes on some versions of OSX). Fixes
11999 bug 21074; bugfix on 0.0.9pre5.
12001 o Minor bugfixes (path selection):
12002 - When selecting relays by bandwidth, avoid a rounding error that
12003 could sometimes cause load to be imbalanced incorrectly.
12004 Previously, we would always round upwards; now, we round towards
12005 the nearest integer. This had the biggest effect when a relay's
12006 weight adjustments should have given it weight 0, but it got
12007 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12008 - When calculating the fraction of nodes that have descriptors, and
12009 all nodes in the network have zero bandwidths, count the number of
12010 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12011 - Actually log the total bandwidth in compute_weighted_bandwidths().
12012 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12014 o Minor bugfixes (portability, msvc):
12015 - Fix a bug in the bit-counting parts of our timing-wheel code on
12016 MSVC. (Note that MSVC is still not a supported build platform, due
12017 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12020 o Minor bugfixes (relay):
12021 - Make the internal channel_is_client() function look at what sort
12022 of connection handshake the other side used, rather than whether
12023 the other side ever sent a create_fast cell to us. Backports part
12024 of the fixes from bugs 22805 and 24898.
12026 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12027 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12029 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12030 bugfix on 0.2.9.4-alpha.
12033 Changes in version 0.3.2.10 - 2018-03-03
12034 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
12035 backports a number of bugfixes, including important fixes for security
12038 It includes an important security fix for a remote crash attack
12039 against directory authorities, tracked as TROVE-2018-001.
12041 Additionally, it backports a fix for a bug whose severity we have
12042 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
12043 triggered in order to crash relays with a use-after-free pattern. As
12044 such, we are now tracking that bug as TROVE-2018-002 and
12045 CVE-2018-0491, and backporting it to earlier releases. This bug
12046 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
12049 This release also backports our new system for improved resistance to
12050 denial-of-service attacks against relays.
12052 This release also fixes several minor bugs and annoyances from
12055 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
12056 today, for the fix to TROVE-2018-002. Directory authorities should
12057 also upgrade. (Relays on earlier versions might want to update too for
12058 the DoS mitigations.)
12060 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
12061 - Fix a protocol-list handling bug that could be used to remotely crash
12062 directory authorities with a null-pointer exception. Fixes bug 25074;
12063 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12066 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
12067 - Avoid adding the same channel twice in the KIST scheduler pending
12068 list, which could lead to remote denial-of-service use-after-free
12069 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
12071 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
12072 - Give relays some defenses against the recent network overload. We
12073 start with three defenses (default parameters in parentheses).
12074 First: if a single client address makes too many concurrent
12075 connections (>100), hang up on further connections. Second: if a
12076 single client address makes circuits too quickly (more than 3 per
12077 second, with an allowed burst of 90) while also having too many
12078 connections open (3), refuse new create cells for the next while
12079 (1-2 hours). Third: if a client asks to establish a rendezvous
12080 point to you directly, ignore the request. These defenses can be
12081 manually controlled by new torrc options, but relays will also
12082 take guidance from consensus parameters, so there's no need to
12083 configure anything manually. Implements ticket 24902.
12085 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
12086 - Fix an "off by 2" error in counting rendezvous failures on the
12087 onion service side. While we thought we would stop the rendezvous
12088 attempt after one failed circuit, we were actually making three
12089 circuit attempts before giving up. Now switch to a default of 2,
12090 and allow the consensus parameter "hs_service_max_rdv_failures" to
12091 override. Fixes bug 24895; bugfix on 0.0.6.
12092 - New-style (v3) onion services now obey the "max rendezvous circuit
12093 attempts" logic. Previously they would make as many rendezvous
12094 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12095 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12097 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
12098 - Add Link protocol version 5 to the supported protocols list. Fixes
12099 bug 25070; bugfix on 0.3.1.1-alpha.
12101 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
12102 - Fix a set of false positives where relays would consider
12103 connections to other relays as being client-only connections (and
12104 thus e.g. deserving different link padding schemes) if those
12105 relays fell out of the consensus briefly. Now we look only at the
12106 initial handshake and whether the connection authenticated as a
12107 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12109 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
12110 - The scheduler subsystem was failing to promptly notice changes in
12111 consensus parameters, making it harder to switch schedulers
12112 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12114 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
12115 - Make our OOM handler aware of the geoip client history cache so it
12116 doesn't fill up the memory. This check is important for IPv6 and
12117 our DoS mitigation subsystem. Closes ticket 25122.
12119 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
12120 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12121 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12122 since they neither disabled TLS 1.3 nor enabled any of the
12123 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12124 Closes ticket 24978.
12126 o Minor features (geoip):
12127 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12130 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
12131 - When logging a failure to create an onion service's descriptor,
12132 also log what the problem with the descriptor was. Diagnostic
12135 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
12136 - Use the actual observed address of an incoming relay connection,
12137 not the canonical address of the relay from its descriptor, when
12138 making decisions about how to handle the incoming connection.
12139 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12141 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
12142 - Fix a possible crash on malformed consensus. If a consensus had
12143 contained an unparseable protocol line, it could have made clients
12144 and relays crash with a null-pointer exception. To exploit this
12145 issue, however, an attacker would need to be able to subvert the
12146 directory authority system. Fixes bug 25251; bugfix on
12147 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12149 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
12150 - Directory authorities, when refusing a descriptor from a rejected
12151 relay, now explicitly tell the relay (in its logs) to set a valid
12152 ContactInfo address and contact the bad-relays@ mailing list.
12153 Fixes bug 25170; bugfix on 0.2.9.1.
12155 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
12156 - When building with Rust on OSX, link against libresolv, to work
12157 around the issue at https://github.com/rust-lang/rust/issues/46797.
12158 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12160 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
12161 - Remove a BUG() statement when a client fetches an onion descriptor
12162 that has a lower revision counter than the one in its cache. This
12163 can happen in normal circumstances due to HSDir desync. Fixes bug
12164 24976; bugfix on 0.3.2.1-alpha.
12166 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
12167 - Don't treat inability to store a cached consensus object as a bug:
12168 it can happen normally when we are out of disk space. Fixes bug
12169 24859; bugfix on 0.3.1.1-alpha.
12171 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
12172 - Improve the performance of our consensus-diff application code
12173 when Tor is built with the --enable-fragile-hardening option set.
12174 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12176 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
12177 - Don't exit the Tor process if setrlimit() fails to change the file
12178 limit (which can happen sometimes on some versions of OSX). Fixes
12179 bug 21074; bugfix on 0.0.9pre5.
12181 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
12182 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12184 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12185 bugfix on 0.2.9.4-alpha.
12187 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
12188 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12189 25005; bugfix on 0.3.2.7-rc.
12191 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
12192 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12193 version, when deciding whether a consensus entry can support the
12194 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12195 bugfix on 0.3.2.1-alpha.
12197 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
12198 - Update the "rust dependencies" submodule to be a project-level
12199 repository, rather than a user repository. Closes ticket 25323.
12201 o Documentation (backport from 0.3.3.1-alpha)
12202 - Document that operators who run more than one relay or bridge are
12203 expected to set MyFamily and ContactInfo correctly. Closes
12207 Changes in version 0.3.3.3-alpha - 2018-03-03
12208 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
12209 It includes an important security fix for a remote crash attack
12210 against directory authorities tracked as TROVE-2018-001.
12212 Additionally, with this release, we are upgrading the severity of a
12213 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
12214 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
12215 a use-after-free pattern. As such, we are now tracking that bug as
12216 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
12217 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
12219 This release also fixes several minor bugs and annoyances from
12222 Relays running 0.3.2.x should upgrade to one of the versions released
12223 today, for the fix to TROVE-2018-002. Directory authorities should
12224 also upgrade. (Relays on earlier versions might want to update too for
12225 the DoS mitigations.)
12227 o Major bugfixes (denial-of-service, directory authority):
12228 - Fix a protocol-list handling bug that could be used to remotely crash
12229 directory authorities with a null-pointer exception. Fixes bug 25074;
12230 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
12233 o Minor features (compatibility, OpenSSL):
12234 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12235 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12236 since they neither disabled TLS 1.3 nor enabled any of the
12237 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12238 Closes ticket 24978.
12240 o Minor features (logging):
12241 - Clarify the log messages produced when getrandom() or a related
12242 entropy-generation mechanism gives an error. Closes ticket 25120.
12244 o Minor features (testing):
12245 - Add a "make test-rust" target to run the rust tests only. Closes
12248 o Minor bugfixes (denial-of-service):
12249 - Fix a possible crash on malformed consensus. If a consensus had
12250 contained an unparseable protocol line, it could have made clients
12251 and relays crash with a null-pointer exception. To exploit this
12252 issue, however, an attacker would need to be able to subvert the
12253 directory authority system. Fixes bug 25251; bugfix on
12254 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12256 o Minor bugfixes (DoS mitigation):
12257 - Add extra safety checks when refilling the circuit creation bucket
12258 to ensure we never set a value above the allowed maximum burst.
12259 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12260 - When a new consensus arrives, don't update our DoS-mitigation
12261 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12264 o Minor bugfixes (man page, SocksPort):
12265 - Remove dead code from the old "SocksSocket" option, and rename
12266 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12267 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12269 o Minor bugfixes (performance):
12270 - Reduce the number of circuits that will be opened at once during
12271 the circuit build timeout phase. This is done by increasing the
12272 idle timeout to 3 minutes, and lowering the maximum number of
12273 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12276 o Minor bugfixes (spec conformance):
12277 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12279 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12280 bugfix on 0.2.9.4-alpha.
12282 o Minor bugfixes (spec conformance, rust):
12283 - Resolve a denial-of-service issue caused by an infinite loop in
12284 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12285 Also tracked as TROVE-2018-003.
12287 o Code simplification and refactoring:
12288 - Update the "rust dependencies" submodule to be a project-level
12289 repository, rather than a user repository. Closes ticket 25323.
12292 Changes in version 0.3.3.2-alpha - 2018-02-10
12293 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12294 introduces a mechanism to handle the high loads that many relay
12295 operators have been reporting recently. It also fixes several bugs in
12296 older releases. If this new code proves reliable, we plan to backport
12297 it to older supported release series.
12299 o Major features (denial-of-service mitigation):
12300 - Give relays some defenses against the recent network overload. We
12301 start with three defenses (default parameters in parentheses).
12302 First: if a single client address makes too many concurrent
12303 connections (>100), hang up on further connections. Second: if a
12304 single client address makes circuits too quickly (more than 3 per
12305 second, with an allowed burst of 90) while also having too many
12306 connections open (3), refuse new create cells for the next while
12307 (1-2 hours). Third: if a client asks to establish a rendezvous
12308 point to you directly, ignore the request. These defenses can be
12309 manually controlled by new torrc options, but relays will also
12310 take guidance from consensus parameters, so there's no need to
12311 configure anything manually. Implements ticket 24902.
12313 o Major bugfixes (netflow padding):
12314 - Stop adding unneeded channel padding right after we finish
12315 flushing to a connection that has been trying to flush for many
12316 seconds. Instead, treat all partial or complete flushes as
12317 activity on the channel, which will defer the time until we need
12318 to add padding. This fix should resolve confusing and scary log
12319 messages like "Channel padding timeout scheduled 221453ms in the
12320 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12322 o Major bugfixes (protocol versions):
12323 - Add Link protocol version 5 to the supported protocols list. Fixes
12324 bug 25070; bugfix on 0.3.1.1-alpha.
12326 o Major bugfixes (scheduler, consensus):
12327 - The scheduler subsystem was failing to promptly notice changes in
12328 consensus parameters, making it harder to switch schedulers
12329 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12331 o Minor features (denial-of-service avoidance):
12332 - Make our OOM handler aware of the geoip client history cache so it
12333 doesn't fill up the memory. This check is important for IPv6 and
12334 our DoS mitigation subsystem. Closes ticket 25122.
12336 o Minor features (directory authority):
12337 - When directory authorities are unable to add signatures to a
12338 pending consensus, log the reason why. Closes ticket 24849.
12340 o Minor features (geoip):
12341 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12344 o Minor features (logging, diagnostic):
12345 - When logging a failure to create an onion service's descriptor,
12346 also log what the problem with the descriptor was. Diagnostic for
12349 o Minor bugfix (channel connection):
12350 - Use the actual observed address of an incoming relay connection,
12351 not the canonical address of the relay from its descriptor, when
12352 making decisions about how to handle the incoming connection.
12353 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12355 o Minor bugfix (directory authority):
12356 - Directory authorities, when refusing a descriptor from a rejected
12357 relay, now explicitly tell the relay (in its logs) to set a valid
12358 ContactInfo address and contact the bad-relays@ mailing list.
12359 Fixes bug 25170; bugfix on 0.2.9.1.
12361 o Minor bugfixes (all versions of Tor):
12362 - Use the "misspell" tool to detect and fix typos throughout the
12363 source code. Fixes bug 23650; bugfix on various versions of Tor.
12364 Patch from Deepesh Pathak.
12366 o Minor bugfixes (circuit, cannibalization):
12367 - Don't cannibalize preemptively-built circuits if we no longer
12368 recognize their first hop. This situation can happen if our Guard
12369 relay went off the consensus after the circuit was created. Fixes
12370 bug 24469; bugfix on 0.0.6.
12372 o Minor bugfixes (correctness):
12373 - Remove a nonworking, unnecessary check to see whether a circuit
12374 hop's identity digest was set when the circuit failed. Fixes bug
12375 24927; bugfix on 0.2.4.4-alpha.
12377 o Minor bugfixes (logging):
12378 - Don't treat inability to store a cached consensus object as a bug:
12379 it can happen normally when we are out of disk space. Fixes bug
12380 24859; bugfix on 0.3.1.1-alpha.
12381 - Fix a (mostly harmless) race condition when invoking
12382 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12383 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12385 o Minor bugfixes (onion services):
12386 - Remove a BUG() statement when a client fetches an onion descriptor
12387 that has a lower revision counter than the one in its cache. This
12388 can happen in normal circumstances due to HSDir desync. Fixes bug
12389 24976; bugfix on 0.3.2.1-alpha.
12390 - If we are configured to offer a single onion service, don't log
12391 long-term established one hop rendezvous points in the heartbeat.
12392 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12394 o Minor bugfixes (performance):
12395 - Avoid calling protocol_list_supports_protocol() from inside tight
12396 loops when running with cached routerinfo_t objects. Instead,
12397 summarize the relevant protocols as flags in the routerinfo_t, as
12398 we do for routerstatus_t objects. This change simplifies our code
12399 a little, and saves a large amount of short-term memory allocation
12400 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12402 o Minor bugfixes (Rust FFI):
12403 - Fix a minor memory leak which would happen whenever the C code
12404 would call the Rust implementation of
12405 protover_get_supported_protocols(). This was due to the C version
12406 returning a static string, whereas the Rust version newly allocated
12407 a CString to pass across the FFI boundary. Consequently, the C
12408 code was not expecting to need to free() what it was given. Fixes
12409 bug 25127; bugfix on 0.3.2.1-alpha.
12411 o Minor bugfixes (scheduler, KIST):
12412 - Avoid adding the same channel twice in the KIST scheduler pending
12413 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12416 o Minor bugfixes (unit test, monotonic time):
12417 - Increase a constant (1msec to 10msec) in the monotonic time test
12418 that makes sure the nsec/usec/msec times read are synchronized.
12419 This change was needed to accommodate slow systems like armel or
12420 when the clock_gettime() is not a VDSO on the running kernel.
12421 Fixes bug 25113; bugfix on 0.2.9.1.
12423 o Minor bugfixes (v3 onion services):
12424 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12425 version, when deciding whether a consensus entry can support the
12426 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12427 bugfix on 0.3.2.1-alpha.
12429 o Code simplification and refactoring:
12430 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12432 - Remove a series of counters used to track circuit extend attempts
12433 and connection status but that in reality we aren't using for
12434 anything other than stats logged by a SIGUSR1 signal. Closes
12437 o Documentation (man page):
12438 - The HiddenServiceVersion torrc option accepts only one number:
12439 either version 2 or 3. Closes ticket 25026; bugfix
12443 Changes in version 0.3.3.1-alpha - 2018-01-25
12444 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
12445 several new features to Tor, including several improvements to
12446 bootstrapping, and support for an experimental "vanguards" feature to
12447 resist guard discovery attacks. This series also includes better
12448 support for applications that need to embed Tor or manage v3
12451 o Major features (embedding):
12452 - There is now a documented stable API for programs that need to
12453 embed Tor. See tor_api.h for full documentation and known bugs.
12454 Closes ticket 23684.
12455 - Tor now has support for restarting in the same process.
12456 Controllers that run Tor using the "tor_api.h" interface can now
12457 restart Tor after Tor has exited. This support is incomplete,
12458 however: we fixed crash bugs that prevented it from working at
12459 all, but many bugs probably remain, including a possibility of
12460 security issues. Implements ticket 24581.
12462 o Major features (IPv6, directory documents):
12463 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
12464 consensus. This information makes it easier for IPv6 clients to
12465 bootstrap and choose reachable entry guards. Implements ticket 23826.
12466 - Add consensus method 28, which removes IPv6 ORPorts from
12467 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
12468 are redundant in microdescs. This change will be used by Tor clients
12469 on 0.2.8.x and later. (That is to say, with all Tor clients that
12470 have IPv6 bootstrap and guard support.) Implements ticket 23828.
12471 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
12472 set by different numbers of authorities. Fixes 23870
12475 o Major features (onion service v3, control port):
12476 - The control port now supports commands and events for v3 onion
12477 services. It is now possible to create ephemeral v3 services using
12478 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
12479 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
12480 DEL_ONION) have been extended to support v3 onion services. Closes
12481 ticket 20699; implements proposal 284.
12483 o Major features (onion services):
12484 - Provide torrc options to pin the second and third hops of onion
12485 service circuits to a list of nodes. The option HSLayer2Guards
12486 pins the second hop, and the option HSLayer3Guards pins the third
12487 hop. These options are for use in conjunction with experiments
12488 with "vanguards" for preventing guard enumeration attacks. Closes
12491 o Major features (rust, portability, experimental):
12492 - Tor now ships with an optional implementation of one of its
12493 smaller modules (protover.c) in the Rust programming language. To
12494 try it out, install a Rust build environment, and configure Tor
12495 with "--enable-rust --enable-cargo-online-mode". This should not
12496 cause any user-visible changes, but should help us gain more
12497 experience with Rust, and plan future Rust integration work.
12498 Implementation by Chelsea Komlo. Closes ticket 22840.
12500 o Minor features (storage, configuration):
12501 - Users can store cached directory documents somewhere other than
12502 the DataDirectory by using the CacheDirectory option. Similarly,
12503 the storage location for relay's keys can be overridden with the
12504 KeyDirectory option. Closes ticket 22703.
12506 o Major features (v3 onion services, ipv6):
12507 - When v3 onion service clients send introduce cells, they now
12508 include the IPv6 address of the rendezvous point, if it has one.
12509 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
12510 in future Tor versions, IPv6-only v3 single onion services will be
12511 able to use IPv6 addresses to connect directly to the rendezvous
12512 point. Closes ticket 23577. Patch by Neel Chauhan.
12514 o Major bugfixes (onion services, retry behavior):
12515 - Fix an "off by 2" error in counting rendezvous failures on the
12516 onion service side. While we thought we would stop the rendezvous
12517 attempt after one failed circuit, we were actually making three
12518 circuit attempts before giving up. Now switch to a default of 2,
12519 and allow the consensus parameter "hs_service_max_rdv_failures" to
12520 override. Fixes bug 24895; bugfix on 0.0.6.
12521 - New-style (v3) onion services now obey the "max rendezvous circuit
12522 attempts" logic. Previously they would make as many rendezvous
12523 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12524 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12526 o Major bugfixes (relays):
12527 - Fix a set of false positives where relays would consider
12528 connections to other relays as being client-only connections (and
12529 thus e.g. deserving different link padding schemes) if those
12530 relays fell out of the consensus briefly. Now we look only at the
12531 initial handshake and whether the connection authenticated as a
12532 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12534 o Minor feature (IPv6):
12535 - Make IPv6-only clients wait for microdescs for relays, even if we
12536 were previously using descriptors (or were using them as a bridge)
12537 and have a cached descriptor for them. Implements ticket 23827.
12538 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
12539 them, rather than waiting to download microdescriptors.
12540 Implements ticket 23827.
12542 o Minor features (cleanup):
12543 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
12544 when it stops. Closes ticket 23271.
12546 o Minor features (defensive programming):
12547 - Most of the functions in Tor that free objects have been replaced
12548 with macros that free the objects and set the corresponding
12549 pointers to NULL. This change should help prevent a large class of
12550 dangling pointer bugs. Closes ticket 24337.
12551 - Where possible, the tor_free() macro now only evaluates its input
12552 once. Part of ticket 24337.
12553 - Check that microdesc ed25519 ids are non-zero in
12554 node_get_ed25519_id() before returning them. Implements ticket
12555 24001, patch by "aruna1234".
12557 o Minor features (embedding):
12558 - Tor can now start with a preauthenticated control connection
12559 created by the process that launched it. This feature is meant for
12560 use by programs that want to launch and manage a Tor process
12561 without allowing other programs to manage it as well. For more
12562 information, see the __OwningControllerFD option documented in
12563 control-spec.txt. Closes ticket 23900.
12564 - On most errors that would cause Tor to exit, it now tries to
12565 return from the tor_main() function, rather than calling the
12566 system exit() function. Most users won't notice a difference here,
12567 but it should be significant for programs that run Tor inside
12568 a separate thread: they should now be able to survive Tor's exit
12569 conditions rather than having Tor shut down the entire process.
12570 Closes ticket 23848.
12571 - Applications that want to embed Tor can now tell Tor not to
12572 register any of its own POSIX signal handlers, using the
12573 __DisableSignalHandlers option. Closes ticket 24588.
12575 o Minor features (fallback directory list):
12576 - Avoid selecting fallbacks that change their IP addresses too
12577 often. Select more fallbacks by ignoring the Guard flag, and
12578 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12579 a lower bandwidth, and a higher number of fallbacks per operator
12580 (5% of the list). Implements ticket 24785.
12581 - Update the fallback whitelist and blacklist based on opt-ins and
12582 relay changes. Closes tickets 22321, 24678, 22527, 24135,
12585 o Minor features (fallback directory mirror configuration):
12586 - Add a nickname to each fallback in a C comment. This makes it
12587 easier for operators to find their relays, and allows stem to use
12588 nicknames to identify fallbacks. Implements ticket 24600.
12589 - Add a type and version header to the fallback directory mirror
12590 file. Also add a delimiter to the end of each fallback entry. This
12591 helps external parsers like stem and Relay Search. Implements
12593 - Add an extrainfo cache flag for each fallback in a C comment. This
12594 allows stem to use fallbacks to fetch extra-info documents, rather
12595 than using authorities. Implements ticket 22759.
12596 - Add the generateFallbackDirLine.py script for automatically
12597 generating fallback directory mirror lines from relay fingerprints.
12598 No more typos! Add the lookupFallbackDirContact.py script for
12599 automatically looking up operator contact info from relay
12600 fingerprints. Implements ticket 24706, patch by teor and atagar.
12601 - Reject any fallback directory mirror that serves an expired
12602 consensus. Implements ticket 20942, patch by "minik".
12603 - Remove commas and equals signs from external string inputs to the
12604 fallback list. This avoids format confusion attacks. Implements
12606 - Remove the "weight=10" line from fallback directory mirror
12607 entries. Ticket 24681 will maintain the current fallback weights
12608 by changing Tor's default fallback weight to 10. Implements
12610 - Stop logging excessive information about fallback netblocks.
12611 Implements ticket 24791.
12613 o Minor features (forward-compatibility):
12614 - If a relay supports some link authentication protocol that we do
12615 not recognize, then include that relay's ed25519 key when telling
12616 other relays to extend to it. Previously, we treated future
12617 versions as if they were too old to support ed25519 link
12618 authentication. Closes ticket 20895.
12620 o Minor features (heartbeat):
12621 - Add onion service information to our heartbeat logs, displaying
12622 stats about the activity of configured onion services. Closes
12625 o Minor features (instrumentation, development):
12626 - Add the MainloopStats option to allow developers to get
12627 instrumentation information from the main event loop via the
12628 heartbeat messages. We hope to use this to improve Tor's behavior
12629 when it's trying to sleep. Closes ticket 24605.
12631 o Minor features (log messages):
12632 - Improve a warning message that happens when we fail to re-parse an
12633 old router because of an expired certificate. Closes ticket 20020.
12634 - Make the log more quantitative when we hit MaxMemInQueues
12635 threshold exposing some values. Closes ticket 24501.
12637 o Minor features (logging, android):
12638 - Added support for the Android logging subsystem. Closes
12641 o Minor features (performance):
12642 - Support predictive circuit building for onion service circuits
12643 with multiple layers of guards. Closes ticket 23101.
12644 - Use stdatomic.h where available, rather than mutexes, to implement
12645 atomic_counter_t. Closes ticket 23953.
12647 o Minor features (performance, 32-bit):
12648 - Improve performance on 32-bit systems by avoiding 64-bit division
12649 when calculating the timestamp in milliseconds for channel padding
12650 computations. Implements ticket 24613.
12651 - Improve performance on 32-bit systems by avoiding 64-bit division
12652 when timestamping cells and buffer chunks for OOM calculations.
12653 Implements ticket 24374.
12655 o Minor features (performance, OSX, iOS):
12656 - Use the mach_approximate_time() function (when available) to
12657 implement coarse monotonic time. Having a coarse time function
12658 should avoid a large number of system calls, and improve
12659 performance slightly, especially under load. Closes ticket 24427.
12661 o Minor features (performance, windows):
12662 - Improve performance on Windows Vista and Windows 7 by adjusting
12663 TCP send window size according to the recommendation from
12664 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
12667 o Major features (relay):
12668 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
12669 operator to use a more reasonable ("reduced") exit policy, rather
12670 than the default one. If you want to run an exit node without
12671 thinking too hard about which ports to allow, this one is for you.
12672 Closes ticket 13605. Patch from Neel Chauhan.
12674 o Minor features (testing, debugging, embedding):
12675 - For development purposes, Tor now has a mode in which it runs for
12676 a few seconds, then stops, and starts again without exiting the
12677 process. This mode is meant to help us debug various issues with
12678 ticket 23847. To use this feature, compile with
12679 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
12680 environment variable. This is expected to crash a lot, and is
12681 really meant for developers only. It will likely be removed in a
12682 future release. Implements ticket 24583.
12684 o Minor bugfix (network IPv6 test):
12685 - Tor's test scripts now check if "ping -6 ::1" works when the user
12686 runs "make test-network-all". Fixes bug 24677; bugfix on
12687 0.2.9.3-alpha. Patch by "ffmancera".
12689 o Minor bugfixes (build, rust):
12690 - Fix output of autoconf checks to display success messages for Rust
12691 dependencies and a suitable rustc compiler version. Fixes bug
12692 24612; bugfix on 0.3.1.3-alpha.
12693 - When building with Rust on OSX, link against libresolv, to work
12694 around the issue at https://github.com/rust-lang/rust/issues/46797.
12695 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12696 - Don't pass the --quiet option to cargo: it seems to suppress some
12697 errors, which is not what we want to do when building. Fixes bug
12698 24518; bugfix on 0.3.1.7.
12699 - Build correctly when building from outside Tor's source tree with
12700 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
12703 o Minor bugfixes (directory authorities, IPv6):
12704 - When creating a routerstatus (vote) from a routerinfo (descriptor),
12705 set the IPv6 address to the unspecified IPv6 address, and
12706 explicitly initialize the port to zero. Fixes bug 24488; bugfix
12709 o Minor bugfixes (fallback directory mirrors):
12710 - Make updateFallbackDirs.py search harder for python. (Some OSs
12711 don't put it in /usr/bin.) Fixes bug 24708; bugfix
12714 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
12715 - When hibernating, close connections normally and allow them to
12716 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
12718 - Do not attempt to launch self-reachability tests when entering
12719 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12720 - Resolve several bugs related to descriptor fetching on bridge
12721 clients with bandwidth accounting enabled. (This combination is
12722 not recommended!) Fixes a case of bug 12062; bugfix
12724 - When hibernating, do not attempt to launch DNS checks. Fixes a
12725 case of bug 12062; bugfix on 0.1.2.2-alpha.
12726 - When hibernating, do not try to upload or download descriptors.
12727 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12729 o Minor bugfixes (IPv6, bridges):
12730 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
12731 bugfix on 0.2.8.2-alpha.
12732 - Tor now sets IPv6 address in the routerstatus as well as in the
12733 router descriptors when updating addresses for a bridge. Closes
12734 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
12736 o Minor bugfixes (linux seccomp2 sandbox):
12737 - When running with the sandbox enabled, reload configuration files
12738 correctly even when %include was used. Previously we would crash.
12739 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
12741 o Minor bugfixes (memory leaks):
12742 - Avoid possible at-exit memory leaks related to use of Libevent's
12743 event_base_once() function. (This function tends to leak memory if
12744 the event_base is closed before the event fires.) Fixes bug 24584;
12745 bugfix on 0.2.8.1-alpha.
12746 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
12749 o Minor bugfixes (OSX):
12750 - Don't exit the Tor process if setrlimit() fails to change the file
12751 limit (which can happen sometimes on some versions of OSX). Fixes
12752 bug 21074; bugfix on 0.0.9pre5.
12754 o Minor bugfixes (performance, fragile-hardening):
12755 - Improve the performance of our consensus-diff application code
12756 when Tor is built with the --enable-fragile-hardening option set.
12757 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12759 o Minor bugfixes (performance, timeouts):
12760 - Consider circuits for timeout as soon as they complete a hop. This
12761 is more accurate than applying the timeout in
12762 circuit_expire_building() because that function is only called
12763 once per second, which is now too slow for typical timeouts on the
12764 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
12765 - Use onion service circuits (and other circuits longer than 3 hops)
12766 to calculate a circuit build timeout. Previously, Tor only
12767 calculated its build timeout based on circuits that planned to be
12768 exactly 3 hops long. With this change, we include measurements
12769 from all circuits at the point where they complete their third
12770 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
12772 o Minor bugfixes (testing):
12773 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
12774 bugfix on 0.2.3.1-alpha.
12775 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12776 25005; bugfix on 0.3.2.7-rc.
12778 o Code simplification and refactoring:
12779 - Remove /usr/athena from search path in configure.ac. Closes
12781 - Remove duplicate code in node_has_curve25519_onion_key() and
12782 node_get_curve25519_onion_key(), and add a check for a zero
12783 microdesc curve25519 onion key. Closes ticket 23966, patch by
12784 "aruna1234" and teor.
12785 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
12786 memory allocations with large numbers of OR connections (e.g.
12787 relays). Closes ticket 24119.
12788 - Separate the function that deletes ephemeral files when Tor
12790 - Small changes to Tor's buf_t API to make it suitable for use as a
12791 general-purpose safe string constructor. Closes ticket 22342.
12792 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
12793 avoid source code identifier confusion. Closes ticket 24467.
12794 - The tor_git_revision[] constant no longer needs to be redeclared
12795 by everything that links against the rest of Tor. Done as part of
12796 ticket 23845, to simplify our external API.
12797 - We make extend_info_from_node() use node_get_curve25519_onion_key()
12798 introduced in ticket 23577 to access the curve25519 public keys
12799 rather than accessing it directly. Closes ticket 23760. Patch by
12801 - Add a function to log channels' scheduler state changes to aid
12802 debugging efforts. Closes ticket 24531.
12805 - Add documentation on how to build tor with Rust dependencies
12806 without having to be online. Closes ticket 22907; bugfix
12808 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
12809 traffic. Closes ticket 24318.
12810 - Document that OutboundBindAddress doesn't apply to DNS requests.
12811 Closes ticket 22145. Patch from Aruna Maurya.
12812 - Document that operators who run more than one relay or bridge are
12813 expected to set MyFamily and ContactInfo correctly. Closes
12816 o Code simplification and refactoring (channels):
12817 - Remove the incoming and outgoing channel queues. These were never
12818 used, but still took up a step in our fast path.
12819 - The majority of the channel unit tests have been rewritten and the
12820 code coverage has now been raised to 83.6% for channel.c. Closes
12822 - Remove other dead code from the channel subsystem: All together,
12823 this cleanup has removed more than 1500 lines of code overall and
12824 adding very little except for unit test.
12826 o Code simplification and refactoring (circuit rendezvous):
12827 - Split the client-side rendezvous circuit lookup into two
12828 functions: one that returns only established circuits and another
12829 that returns all kinds of circuits. Closes ticket 23459.
12831 o Code simplification and refactoring (controller):
12832 - Make most of the variables in networkstatus_getinfo_by_purpose()
12833 const. Implements ticket 24489.
12836 Changes in version 0.3.2.9 - 2018-01-09
12837 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
12839 The 0.3.2 series includes our long-anticipated new onion service
12840 design, with numerous security features. (For more information, see
12841 our blog post at https://blog.torproject.org/fall-harvest.) We also
12842 have a new circuit scheduler algorithm for improved performance on
12843 relays everywhere (see https://blog.torproject.org/kist-and-tell),
12844 along with many smaller features and bugfixes.
12846 Per our stable release policy, we plan to support each stable release
12847 series for at least the next nine months, or for three months after
12848 the first stable release of the next series: whichever is longer. If
12849 you need a release with long-term support, we recommend that you stay
12850 with the 0.2.9 series.
12852 Below is a list of the changes since 0.3.2.8-rc. For a list of all
12853 changes since 0.3.1, see the ReleaseNotes file.
12855 o Minor features (fallback directory mirrors):
12856 - The fallback directory list has been re-generated based on the
12857 current status of the network. Tor uses fallback directories to
12858 bootstrap when it doesn't yet have up-to-date directory
12859 information. Closes ticket 24801.
12860 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12861 prefer to bootstrap from fallback directory mirrors. This is a
12862 follow-up to 24679, which removed weights from the default
12863 fallbacks. Implements ticket 24681.
12865 o Minor features (geoip):
12866 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
12869 o Minor bugfixes (address selection):
12870 - When the fascist_firewall_choose_address_ functions don't find a
12871 reachable address, set the returned address to the null address
12872 and port. This is a precautionary measure, because some callers do
12873 not check the return value. Fixes bug 24736; bugfix
12876 o Minor bugfixes (compilation):
12877 - Resolve a few shadowed-variable warnings in the onion service
12878 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
12880 o Minor bugfixes (portability, msvc):
12881 - Fix a bug in the bit-counting parts of our timing-wheel code on
12882 MSVC. (Note that MSVC is still not a supported build platform, due
12883 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12887 Changes in version 0.3.2.8-rc - 2017-12-21
12888 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
12889 schedulers that had led servers under heavy load to overload their
12890 outgoing connections. All relay operators running earlier 0.3.2.x
12891 versions should upgrade. This version also includes a mitigation for
12892 over-full DESTROY queues leading to out-of-memory conditions: if it
12893 works, we will soon backport it to earlier release series.
12895 This is the second release candidate in the 0.3.2 series. If we find
12896 no new bugs or regression here, then the first stable 0.3.2 release
12897 will be nearly identical to this.
12899 o Major bugfixes (KIST, scheduler):
12900 - The KIST scheduler did not correctly account for data already
12901 enqueued in each connection's send socket buffer, particularly in
12902 cases when the TCP/IP congestion window was reduced between
12903 scheduler calls. This situation lead to excessive per-connection
12904 buffering in the kernel, and a potential memory DoS. Fixes bug
12905 24665; bugfix on 0.3.2.1-alpha.
12907 o Minor features (geoip):
12908 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
12911 o Minor bugfixes (hidden service v3):
12912 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
12913 the probability of reaching a service for a client missing
12914 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
12916 o Minor bugfixes (memory usage):
12917 - When queuing DESTROY cells on a channel, only queue the circuit-id
12918 and reason fields: not the entire 514-byte cell. This fix should
12919 help mitigate any bugs or attacks that fill up these queues, and
12920 free more RAM for other uses. Fixes bug 24666; bugfix
12923 o Minor bugfixes (scheduler, KIST):
12924 - Use a sane write limit for KISTLite when writing onto a connection
12925 buffer instead of using INT_MAX and shoving as much as it can.
12926 Because the OOM handler cleans up circuit queues, we are better
12927 off at keeping them in that queue instead of the connection's
12928 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
12931 Changes in version 0.3.2.7-rc - 2017-12-14
12932 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
12933 including some that could affect reliability or correctness.
12935 This is the first release candidate in the 0.3.2 series. If we find no
12936 new bugs or regression here, then the first stable 0.3.2. release will
12937 be nearly identical to this.
12939 o Major bugfixes (circuit prediction):
12940 - Fix circuit prediction logic so that a client doesn't treat a port
12941 as being "handled" by a circuit if that circuit already has
12942 isolation settings on it. This change should make Tor clients more
12943 responsive by improving their chances of having a pre-created
12944 circuit ready for use when a request arrives. Fixes bug 18859;
12945 bugfix on 0.2.3.3-alpha.
12947 o Minor features (logging):
12948 - Provide better warnings when the getrandom() syscall fails. Closes
12951 o Minor features (portability):
12952 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
12953 (It doesn't yet work with the sandbox enabled.) Closes
12956 o Minor bugfixes (bridge clients, bootstrap):
12957 - Retry directory downloads when we get our first bridge descriptor
12958 during bootstrap or while reconnecting to the network. Keep
12959 retrying every time we get a bridge descriptor, until we have a
12960 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
12961 - Stop delaying bridge descriptor fetches when we have cached bridge
12962 descriptors. Instead, only delay bridge descriptor fetches when we
12963 have at least one reachable bridge. Fixes part of bug 24367;
12964 bugfix on 0.2.0.3-alpha.
12965 - Stop delaying directory fetches when we have cached bridge
12966 descriptors. Instead, only delay bridge descriptor fetches when
12967 all our bridges are definitely unreachable. Fixes part of bug
12968 24367; bugfix on 0.2.0.3-alpha.
12970 o Minor bugfixes (compilation):
12971 - Fix a signed/unsigned comparison warning introduced by our fix to
12972 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12974 o Minor bugfixes (correctness):
12975 - Fix several places in our codebase where a C compiler would be
12976 likely to eliminate a check, based on assuming that undefined
12977 behavior had not happened elsewhere in the code. These cases are
12978 usually a sign of redundant checking or dubious arithmetic. Found
12979 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
12980 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
12983 o Minor bugfixes (onion service v3):
12984 - Fix a race where an onion service would launch a new intro circuit
12985 after closing an old one, but fail to register it before freeing
12986 the previously closed circuit. This bug was making the service
12987 unable to find the established intro circuit and thus not upload
12988 its descriptor, thus making a service unavailable for up to 24
12989 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
12991 o Minor bugfixes (scheduler, KIST):
12992 - Properly set the scheduler state of an unopened channel in the
12993 KIST scheduler main loop. This prevents a harmless but annoying
12994 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
12995 - Avoid a possible integer overflow when computing the available
12996 space on the TCP buffer of a channel. This had no security
12997 implications; but could make KIST allow too many cells on a
12998 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
12999 - Downgrade to "info" a harmless warning about the monotonic time
13000 moving backwards: This can happen on platform not supporting
13001 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13004 Changes in version 0.3.2.6-alpha - 2017-12-01
13005 This version of Tor is the latest in the 0.3.2 alpha series. It
13006 includes fixes for several important security issues. All Tor users
13007 should upgrade to this release, or to one of the other releases coming
13010 o Major bugfixes (security):
13011 - Fix a denial of service bug where an attacker could use a
13012 malformed directory object to cause a Tor instance to pause while
13013 OpenSSL would try to read a passphrase from the terminal. (Tor
13014 instances run without a terminal, which is the case for most Tor
13015 packages, are not impacted.) Fixes bug 24246; bugfix on every
13016 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13017 Found by OSS-Fuzz as testcase 6360145429790720.
13018 - Fix a denial of service issue where an attacker could crash a
13019 directory authority using a malformed router descriptor. Fixes bug
13020 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13022 - When checking for replays in the INTRODUCE1 cell data for a
13023 (legacy) onion service, correctly detect replays in the RSA-
13024 encrypted part of the cell. We were previously checking for
13025 replays on the entire cell, but those can be circumvented due to
13026 the malleability of Tor's legacy hybrid encryption. This fix helps
13027 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13028 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13031 o Major bugfixes (security, onion service v2):
13032 - Fix a use-after-free error that could crash v2 Tor onion services
13033 when they failed to open circuits while expiring introduction
13034 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13035 also tracked as TROVE-2017-013 and CVE-2017-8823.
13037 o Major bugfixes (security, relay):
13038 - When running as a relay, make sure that we never build a path
13039 through ourselves, even in the case where we have somehow lost the
13040 version of our descriptor appearing in the consensus. Fixes part
13041 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13042 as TROVE-2017-012 and CVE-2017-8822.
13043 - When running as a relay, make sure that we never choose ourselves
13044 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13045 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13047 o Minor feature (relay statistics):
13048 - Change relay bandwidth reporting stats interval from 4 hours to 24
13049 hours in order to reduce the efficiency of guard discovery
13050 attacks. Fixes ticket 23856.
13052 o Minor features (directory authority):
13053 - Add an IPv6 address for the "bastet" directory authority. Closes
13056 o Minor bugfixes (client):
13057 - By default, do not enable storage of client-side DNS values. These
13058 values were unused by default previously, but they should not have
13059 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
13062 Changes in version 0.3.1.9 - 2017-12-01:
13063 Tor 0.3.1.9 backports important security and stability fixes from the
13064 0.3.2 development series. All Tor users should upgrade to this
13065 release, or to another of the releases coming out today.
13067 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13068 - Fix a denial of service bug where an attacker could use a
13069 malformed directory object to cause a Tor instance to pause while
13070 OpenSSL would try to read a passphrase from the terminal. (Tor
13071 instances run without a terminal, which is the case for most Tor
13072 packages, are not impacted.) Fixes bug 24246; bugfix on every
13073 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13074 Found by OSS-Fuzz as testcase 6360145429790720.
13075 - Fix a denial of service issue where an attacker could crash a
13076 directory authority using a malformed router descriptor. Fixes bug
13077 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13079 - When checking for replays in the INTRODUCE1 cell data for a
13080 (legacy) onion service, correctly detect replays in the RSA-
13081 encrypted part of the cell. We were previously checking for
13082 replays on the entire cell, but those can be circumvented due to
13083 the malleability of Tor's legacy hybrid encryption. This fix helps
13084 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13085 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13088 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13089 - Fix a use-after-free error that could crash v2 Tor onion services
13090 when they failed to open circuits while expiring introduction
13091 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13092 also tracked as TROVE-2017-013 and CVE-2017-8823.
13094 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13095 - When running as a relay, make sure that we never build a path
13096 through ourselves, even in the case where we have somehow lost the
13097 version of our descriptor appearing in the consensus. Fixes part
13098 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13099 as TROVE-2017-012 and CVE-2017-8822.
13100 - When running as a relay, make sure that we never choose ourselves
13101 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13102 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13104 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13105 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13106 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13107 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13108 identifying and finding a workaround to this bug and to Moritz,
13109 Arthur Edelstein, and Roger for helping to track it down and
13112 o Minor features (bridge):
13113 - Bridges now include notice in their descriptors that they are
13114 bridges, and notice of their distribution status, based on their
13115 publication settings. Implements ticket 18329. For more fine-
13116 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13119 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13120 - Add an IPv6 address for the "bastet" directory authority. Closes
13123 o Minor features (geoip):
13124 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13127 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13128 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13129 relays, to prevent spurious address resolutions and descriptor
13130 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13131 bugfix on in 0.2.8.1-alpha.
13133 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13134 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13135 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13137 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13138 - When a circuit is marked for close, do not attempt to package any
13139 cells for channels on that circuit. Previously, we would detect
13140 this condition lower in the call stack, when we noticed that the
13141 circuit had no attached channel, and log an annoying message.
13142 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13144 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
13145 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13146 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13149 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13150 - Avoid a crash when transitioning from client mode to bridge mode.
13151 Previously, we would launch the worker threads whenever our
13152 "public server" mode changed, but not when our "server" mode
13153 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13156 Changes in version 0.3.0.13 - 2017-12-01
13157 Tor 0.3.0.13 backports important security and stability bugfixes from
13158 later Tor releases. All Tor users should upgrade to this release, or
13159 to another of the releases coming out today.
13161 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13162 2018. If you need a release with long-term support, please stick with
13163 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13165 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13166 - Fix a denial of service bug where an attacker could use a
13167 malformed directory object to cause a Tor instance to pause while
13168 OpenSSL would try to read a passphrase from the terminal. (Tor
13169 instances run without a terminal, which is the case for most Tor
13170 packages, are not impacted.) Fixes bug 24246; bugfix on every
13171 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13172 Found by OSS-Fuzz as testcase 6360145429790720.
13173 - Fix a denial of service issue where an attacker could crash a
13174 directory authority using a malformed router descriptor. Fixes bug
13175 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13177 - When checking for replays in the INTRODUCE1 cell data for a
13178 (legacy) onion service, correctly detect replays in the RSA-
13179 encrypted part of the cell. We were previously checking for
13180 replays on the entire cell, but those can be circumvented due to
13181 the malleability of Tor's legacy hybrid encryption. This fix helps
13182 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13183 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13186 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13187 - Fix a use-after-free error that could crash v2 Tor onion services
13188 when they failed to open circuits while expiring introduction
13189 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13190 also tracked as TROVE-2017-013 and CVE-2017-8823.
13192 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13193 - When running as a relay, make sure that we never build a path
13194 through ourselves, even in the case where we have somehow lost the
13195 version of our descriptor appearing in the consensus. Fixes part
13196 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13197 as TROVE-2017-012 and CVE-2017-8822.
13198 - When running as a relay, make sure that we never choose ourselves
13199 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
13200 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
13202 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13203 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13204 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13205 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13206 identifying and finding a workaround to this bug and to Moritz,
13207 Arthur Edelstein, and Roger for helping to track it down and
13210 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13211 - Enable a couple of pieces of Windows hardening: one
13212 (HeapEnableTerminationOnCorruption) that has been on-by-default
13213 since Windows 8, and unavailable before Windows 7; and one
13214 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13215 affect us, but shouldn't do any harm. Closes ticket 21953.
13217 o Minor features (bridge, backport from 0.3.1.9):
13218 - Bridges now include notice in their descriptors that they are
13219 bridges, and notice of their distribution status, based on their
13220 publication settings. Implements ticket 18329. For more fine-
13221 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13224 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13225 - Add an IPv6 address for the "bastet" directory authority. Closes
13228 o Minor features (geoip):
13229 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13232 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13233 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13234 relays, to prevent spurious address resolutions and descriptor
13235 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13236 bugfix on in 0.2.8.1-alpha.
13238 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13239 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13240 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13242 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13243 - When a circuit is marked for close, do not attempt to package any
13244 cells for channels on that circuit. Previously, we would detect
13245 this condition lower in the call stack, when we noticed that the
13246 circuit had no attached channel, and log an annoying message.
13247 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13249 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13250 - Avoid a crash when transitioning from client mode to bridge mode.
13251 Previously, we would launch the worker threads whenever our
13252 "public server" mode changed, but not when our "server" mode
13253 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13255 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13256 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13257 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13260 Changes in version 0.2.9.14 - 2017-12-01
13261 Tor 0.3.0.13 backports important security and stability bugfixes from
13262 later Tor releases. All Tor users should upgrade to this release, or
13263 to another of the releases coming out today.
13265 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13266 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13267 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13268 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13269 identifying and finding a workaround to this bug and to Moritz,
13270 Arthur Edelstein, and Roger for helping to track it down and
13273 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13274 - Fix a denial of service bug where an attacker could use a
13275 malformed directory object to cause a Tor instance to pause while
13276 OpenSSL would try to read a passphrase from the terminal. (Tor
13277 instances run without a terminal, which is the case for most Tor
13278 packages, are not impacted.) Fixes bug 24246; bugfix on every
13279 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13280 Found by OSS-Fuzz as testcase 6360145429790720.
13281 - Fix a denial of service issue where an attacker could crash a
13282 directory authority using a malformed router descriptor. Fixes bug
13283 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13285 - When checking for replays in the INTRODUCE1 cell data for a
13286 (legacy) onion service, correctly detect replays in the RSA-
13287 encrypted part of the cell. We were previously checking for
13288 replays on the entire cell, but those can be circumvented due to
13289 the malleability of Tor's legacy hybrid encryption. This fix helps
13290 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13291 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13294 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13295 - Fix a use-after-free error that could crash v2 Tor onion services
13296 when they failed to open circuits while expiring introduction
13297 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13298 also tracked as TROVE-2017-013 and CVE-2017-8823.
13300 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13301 - When running as a relay, make sure that we never build a path
13302 through ourselves, even in the case where we have somehow lost the
13303 version of our descriptor appearing in the consensus. Fixes part
13304 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13305 as TROVE-2017-012 and CVE-2017-8822.
13307 o Minor features (bridge, backport from 0.3.1.9):
13308 - Bridges now include notice in their descriptors that they are
13309 bridges, and notice of their distribution status, based on their
13310 publication settings. Implements ticket 18329. For more fine-
13311 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13314 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13315 - Add an IPv6 address for the "bastet" directory authority. Closes
13318 o Minor features (geoip):
13319 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13322 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13323 - Enable a couple of pieces of Windows hardening: one
13324 (HeapEnableTerminationOnCorruption) that has been on-by-default
13325 since Windows 8, and unavailable before Windows 7; and one
13326 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13327 affect us, but shouldn't do any harm. Closes ticket 21953.
13329 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13330 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13331 relays, to prevent spurious address resolutions and descriptor
13332 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13333 bugfix on in 0.2.8.1-alpha.
13335 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13336 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13337 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13339 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13340 - When a circuit is marked for close, do not attempt to package any
13341 cells for channels on that circuit. Previously, we would detect
13342 this condition lower in the call stack, when we noticed that the
13343 circuit had no attached channel, and log an annoying message.
13344 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13346 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13347 - Avoid a crash when transitioning from client mode to bridge mode.
13348 Previously, we would launch the worker threads whenever our
13349 "public server" mode changed, but not when our "server" mode
13350 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13352 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13353 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13354 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13357 Changes in version 0.2.8.17 - 2017-12-01
13358 Tor 0.2.8.17 backports important security and stability bugfixes from
13359 later Tor releases. All Tor users should upgrade to this release, or
13360 to another of the releases coming out today.
13362 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13363 2018. If you need a release with long-term support, please upgrade with
13364 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13366 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13367 - Fix a denial of service bug where an attacker could use a
13368 malformed directory object to cause a Tor instance to pause while
13369 OpenSSL would try to read a passphrase from the terminal. (Tor
13370 instances run without a terminal, which is the case for most Tor
13371 packages, are not impacted.) Fixes bug 24246; bugfix on every
13372 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13373 Found by OSS-Fuzz as testcase 6360145429790720.
13374 - When checking for replays in the INTRODUCE1 cell data for a
13375 (legacy) onion service, correctly detect replays in the RSA-
13376 encrypted part of the cell. We were previously checking for
13377 replays on the entire cell, but those can be circumvented due to
13378 the malleability of Tor's legacy hybrid encryption. This fix helps
13379 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13380 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13383 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13384 - Fix a use-after-free error that could crash v2 Tor onion services
13385 when they failed to open circuits while expiring introduction
13386 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13387 also tracked as TROVE-2017-013 and CVE-2017-8823.
13389 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13390 - When running as a relay, make sure that we never build a path through
13391 ourselves, even in the case where we have somehow lost the version of
13392 our descriptor appearing in the consensus. Fixes part of bug 21534;
13393 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13396 o Minor features (bridge, backport from 0.3.1.9):
13397 - Bridges now include notice in their descriptors that they are
13398 bridges, and notice of their distribution status, based on their
13399 publication settings. Implements ticket 18329. For more fine-
13400 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13403 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13404 - Add an IPv6 address for the "bastet" directory authority. Closes
13407 o Minor features (geoip):
13408 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13411 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13412 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13413 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13416 Changes in version 0.2.5.16 - 2017-12-01
13417 Tor 0.2.5.13 backports important security and stability bugfixes from
13418 later Tor releases. All Tor users should upgrade to this release, or
13419 to another of the releases coming out today.
13421 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13422 2018. If you need a release with long-term support, please upgrade to
13423 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13425 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13426 - Fix a denial of service bug where an attacker could use a
13427 malformed directory object to cause a Tor instance to pause while
13428 OpenSSL would try to read a passphrase from the terminal. (Tor
13429 instances run without a terminal, which is the case for most Tor
13430 packages, are not impacted.) Fixes bug 24246; bugfix on every
13431 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13432 Found by OSS-Fuzz as testcase 6360145429790720.
13433 - When checking for replays in the INTRODUCE1 cell data for a
13434 (legacy) onion service, correctly detect replays in the RSA-
13435 encrypted part of the cell. We were previously checking for
13436 replays on the entire cell, but those can be circumvented due to
13437 the malleability of Tor's legacy hybrid encryption. This fix helps
13438 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13439 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13442 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13443 - When running as a relay, make sure that we never build a path
13444 through ourselves, even in the case where we have somehow lost the
13445 version of our descriptor appearing in the consensus. Fixes part
13446 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13447 as TROVE-2017-012 and CVE-2017-8822.
13449 o Minor features (bridge, backport from 0.3.1.9):
13450 - Bridges now include notice in their descriptors that they are
13451 bridges, and notice of their distribution status, based on their
13452 publication settings. Implements ticket 18329. For more fine-
13453 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13456 o Minor features (geoip):
13457 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13461 Changes in version 0.3.2.5-alpha - 2017-11-22
13462 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
13463 fixes several stability and reliability bugs, including a fix for
13464 intermittent bootstrapping failures that some people have been seeing
13465 since the 0.3.0.x series.
13467 Please test this alpha out -- many of these fixes will soon be
13468 backported to stable Tor versions if no additional bugs are found
13471 o Major bugfixes (bootstrapping):
13472 - Fetch descriptors aggressively whenever we lack enough to build
13473 circuits, regardless of how many descriptors we are missing.
13474 Previously, we would delay launching the fetch when we had fewer
13475 than 15 missing descriptors, even if some of those descriptors
13476 were blocking circuits from building. Fixes bug 23985; bugfix on
13477 0.1.1.11-alpha. The effects of this bug became worse in
13478 0.3.0.3-alpha, when we began treating missing descriptors from our
13479 primary guards as a reason to delay circuits.
13480 - Don't try fetching microdescriptors from relays that have failed
13481 to deliver them in the past. Fixes bug 23817; bugfix
13484 o Minor features (directory authority):
13485 - Make the "Exit" flag assignment only depend on whether the exit
13486 policy allows connections to ports 80 and 443. Previously relays
13487 would get the Exit flag if they allowed connections to one of
13488 these ports and also port 6667. Resolves ticket 23637.
13490 o Minor features (geoip):
13491 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13494 o Minor features (linux seccomp2 sandbox):
13495 - Update the sandbox rules so that they should now work correctly
13496 with Glibc 2.26. Closes ticket 24315.
13498 o Minor features (logging):
13499 - Downgrade a pair of log messages that could occur when an exit's
13500 resolver gave us an unusual (but not forbidden) response. Closes
13502 - Improve the message we log when re-enabling circuit build timeouts
13503 after having received a consensus. Closes ticket 20963.
13505 o Minor bugfixes (compilation):
13506 - Fix a memory leak warning in one of the libevent-related
13507 configuration tests that could occur when manually specifying
13508 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
13509 Found and patched by Alex Xu.
13510 - When detecting OpenSSL on Windows from our configure script, make
13511 sure to try linking with the ws2_32 library. Fixes bug 23783;
13512 bugfix on 0.3.2.2-alpha.
13514 o Minor bugfixes (control port, linux seccomp2 sandbox):
13515 - Avoid a crash when attempting to use the seccomp2 sandbox together
13516 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
13519 o Minor bugfixes (control port, onion services):
13520 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
13521 HS_DESC event when a service is not able to upload a descriptor.
13522 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
13524 o Minor bugfixes (directory cache):
13525 - Recover better from empty or corrupt files in the consensus cache
13526 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
13527 - When a consensus diff calculation is only partially successful,
13528 only record the successful parts as having succeeded. Partial
13529 success can happen if (for example) one compression method fails
13530 but the others succeed. Previously we misrecorded all the
13531 calculations as having succeeded, which would later cause a
13532 nonfatal assertion failure. Fixes bug 24086; bugfix
13535 o Minor bugfixes (logging):
13536 - Only log once if we notice that KIST support is gone. Fixes bug
13537 24158; bugfix on 0.3.2.1-alpha.
13538 - Suppress a log notice when relay descriptors arrive. We already
13539 have a bootstrap progress for this so no need to log notice
13540 everytime tor receives relay descriptors. Microdescriptors behave
13541 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
13543 o Minor bugfixes (network layer):
13544 - When closing a connection via close_connection_immediately(), we
13545 mark it as "not blocked on bandwidth", to prevent later calls from
13546 trying to unblock it, and give it permission to read. This fixes a
13547 backtrace warning that can happen on relays under various
13548 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
13550 o Minor bugfixes (onion services):
13551 - The introduction circuit was being timed out too quickly while
13552 waiting for the rendezvous circuit to complete. Keep the intro
13553 circuit around longer instead of timing out and reopening new ones
13554 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
13555 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13556 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13558 - Silence a warning about failed v3 onion descriptor uploads that
13559 can happen naturally under certain edge cases. Fixes part of bug
13560 23662; bugfix on 0.3.2.1-alpha.
13562 o Minor bugfixes (tests):
13563 - Fix a memory leak in one of the bridge-distribution test cases.
13564 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13565 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13566 to correctly handle cases where a caller gives it an RSA key of
13567 under 160 bits. (This is not actually a bug in Tor itself, but
13568 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13569 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13572 - Add notes in man page regarding OS support for the various
13573 scheduler types. Attempt to use less jargon in the scheduler
13574 section. Closes ticket 24254.
13577 Changes in version 0.3.2.4-alpha - 2017-11-08
13578 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13579 It fixes several stability and reliability bugs, especially including
13580 a major reliability issue that has been plaguing fast exit relays in
13583 o Major bugfixes (exit relays, DNS):
13584 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13585 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13586 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13587 identifying and finding a workaround to this bug and to Moritz,
13588 Arthur Edelstein, and Roger for helping to track it down and
13591 o Major bugfixes (scheduler, channel):
13592 - Stop processing scheduled channels if they closed while flushing
13593 cells. This can happen if the write on the connection fails
13594 leading to the channel being closed while in the scheduler loop.
13595 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
13597 o Minor features (logging, scheduler):
13598 - Introduce a SCHED_BUG() function to log extra information about
13599 the scheduler state if we ever catch a bug in the scheduler.
13600 Closes ticket 23753.
13602 o Minor features (removed deprecations):
13603 - The ClientDNSRejectInternalAddresses flag can once again be set in
13604 non-testing Tor networks, so long as they do not use the default
13605 directory authorities. This change also removes the deprecation of
13606 this flag from 0.2.9.2-alpha. Closes ticket 21031.
13608 o Minor features (testing):
13609 - Our fuzzing tests now test the encrypted portions of v3 onion
13610 service descriptors. Implements more of 21509.
13612 o Minor bugfixes (directory client):
13613 - On failure to download directory information, delay retry attempts
13614 by a random amount based on the "decorrelated jitter" algorithm.
13615 Our previous delay algorithm tended to produce extra-long delays
13616 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
13618 o Minor bugfixes (IPv6, v3 single onion services):
13619 - Remove buggy code for IPv6-only v3 single onion services, and
13620 reject attempts to configure them. This release supports IPv4,
13621 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
13622 stack v3 single onion services. Fixes bug 23820; bugfix
13625 o Minor bugfixes (logging, relay):
13626 - Give only a protocol warning when the ed25519 key is not
13627 consistent between the descriptor and microdescriptor of a relay.
13628 This can happen, for instance, if the relay has been flagged
13629 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
13631 o Minor bugfixes (manpage, onion service):
13632 - Document that the HiddenServiceNumIntroductionPoints option is
13633 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
13634 bugfix on 0.3.2.1-alpha.
13636 o Minor bugfixes (memory leaks):
13637 - Fix a minor memory leak at exit in the KIST scheduler. This bug
13638 should have no user-visible impact. Fixes bug 23774; bugfix
13640 - Fix a memory leak when decrypting a badly formatted v3 onion
13641 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
13642 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
13644 o Minor bugfixes (onion services):
13645 - Cache some needed onion service client information instead of
13646 constantly computing it over and over again. Fixes bug 23623;
13647 bugfix on 0.3.2.1-alpha.
13648 - Properly retry HSv3 descriptor fetches when missing required
13649 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
13651 o Minor bugfixes (path selection):
13652 - When selecting relays by bandwidth, avoid a rounding error that
13653 could sometimes cause load to be imbalanced incorrectly.
13654 Previously, we would always round upwards; now, we round towards
13655 the nearest integer. This had the biggest effect when a relay's
13656 weight adjustments should have given it weight 0, but it got
13657 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
13658 - When calculating the fraction of nodes that have descriptors, and
13659 all nodes in the network have zero bandwidths, count the number of
13660 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
13661 - Actually log the total bandwidth in compute_weighted_bandwidths().
13662 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
13664 o Minor bugfixes (relay, crash):
13665 - Avoid a crash when transitioning from client mode to bridge mode.
13666 Previously, we would launch the worker threads whenever our
13667 "public server" mode changed, but not when our "server" mode
13668 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13670 o Minor bugfixes (testing):
13671 - Fix a spurious fuzzing-only use of an uninitialized value. Found
13672 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
13673 - Test that IPv6-only clients can use microdescriptors when running
13674 "make test-network-all". Requires chutney master 61c28b9 or later.
13675 Closes ticket 24109.
13678 Changes in version 0.3.2.3-alpha - 2017-10-27
13679 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
13680 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
13681 directory authority, Bastet.
13683 o Directory authority changes:
13684 - Add "Bastet" as a ninth directory authority to the default list.
13685 Closes ticket 23910.
13686 - The directory authority "Longclaw" has changed its IP address.
13687 Closes ticket 23592.
13689 o Minor features (bridge):
13690 - Bridge relays can now set the BridgeDistribution config option to
13691 add a "bridge-distribution-request" line to their bridge
13692 descriptor, which tells BridgeDB how they'd like their bridge
13693 address to be given out. (Note that as of Oct 2017, BridgeDB does
13694 not yet implement this feature.) As a side benefit, this feature
13695 provides a way to distinguish bridge descriptors from non-bridge
13696 descriptors. Implements tickets 18329.
13698 o Minor features (client, entry guards):
13699 - Improve log messages when missing descriptors for primary guards.
13700 Resolves ticket 23670.
13702 o Minor features (geoip):
13703 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13706 o Minor bugfixes (bridge):
13707 - Overwrite the bridge address earlier in the process of retrieving
13708 its descriptor, to make sure we reach it on the configured
13709 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
13711 o Minor bugfixes (documentation):
13712 - Document better how to read gcov, and what our gcov postprocessing
13713 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
13715 o Minor bugfixes (entry guards):
13716 - Tor now updates its guard state when it reads a consensus
13717 regardless of whether it's missing descriptors. That makes tor use
13718 its primary guards to fetch descriptors in some edge cases where
13719 it would previously have used fallback directories. Fixes bug
13720 23862; bugfix on 0.3.0.1-alpha.
13722 o Minor bugfixes (hidden service client):
13723 - When handling multiple SOCKS request for the same .onion address,
13724 only fetch the service descriptor once.
13725 - When a descriptor fetch fails with a non-recoverable error, close
13726 all pending SOCKS requests for that .onion. Fixes bug 23653;
13727 bugfix on 0.3.2.1-alpha.
13729 o Minor bugfixes (hidden service):
13730 - Always regenerate missing hidden service public key files. Prior
13731 to this, if the public key was deleted from disk, it wouldn't get
13732 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
13734 - Make sure that we have a usable ed25519 key when the intro point
13735 relay supports ed25519 link authentication. Fixes bug 24002;
13736 bugfix on 0.3.2.1-alpha.
13738 o Minor bugfixes (hidden service, v2):
13739 - When reloading configured hidden services, copy all information
13740 from the old service object. Previously, some data was omitted,
13741 causing delays in descriptor upload, and other bugs. Fixes bug
13742 23790; bugfix on 0.2.1.9-alpha.
13744 o Minor bugfixes (memory safety, defensive programming):
13745 - Clear the target address when node_get_prim_orport() returns
13746 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13748 o Minor bugfixes (relay):
13749 - Avoid a BUG warning when receiving a dubious CREATE cell while an
13750 option transition is in progress. Fixes bug 23952; bugfix
13753 o Minor bugfixes (testing):
13754 - Adjust the GitLab CI configuration to more closely match that of
13755 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
13756 - Prevent scripts/test/coverage from attempting to move gcov output
13757 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
13758 - When running unit tests as root, skip a test that would fail
13759 because it expects a permissions error. This affects some
13760 continuous integration setups. Fixes bug 23758; bugfix
13762 - Stop unconditionally mirroring the tor repository in GitLab CI.
13763 This prevented developers from enabling GitLab CI on master. Fixes
13764 bug 23755; bugfix on 0.3.2.2-alpha.
13765 - Fix the hidden service v3 descriptor decoding fuzzing to use the
13766 latest decoding API correctly. Fixes bug 21509; bugfix
13769 o Minor bugfixes (warnings):
13770 - When we get an HTTP request on a SOCKS port, tell the user about
13771 the new HTTPTunnelPort option. Previously, we would give a "Tor is
13772 not an HTTP Proxy" message, which stopped being true when
13773 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
13777 Changes in version 0.2.5.15 - 2017-10-25
13778 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
13779 series. It also adds a new directory authority, Bastet.
13781 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13782 2018. If you need a release with long-term support, please upgrade to
13783 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13785 o Directory authority changes:
13786 - Add "Bastet" as a ninth directory authority to the default list.
13787 Closes ticket 23910.
13788 - The directory authority "Longclaw" has changed its IP address.
13789 Closes ticket 23592.
13791 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13792 - Avoid an assertion failure bug affecting our implementation of
13793 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13794 handling of "0xx" differs from what we had expected. Fixes bug
13795 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13797 o Minor features (geoip):
13798 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13801 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13802 - Fix a memset() off the end of an array when packing cells. This
13803 bug should be harmless in practice, since the corrupted bytes are
13804 still in the same structure, and are always padding bytes,
13805 ignored, or immediately overwritten, depending on compiler
13806 behavior. Nevertheless, because the memset()'s purpose is to make
13807 sure that any other cell-handling bugs can't expose bytes to the
13808 network, we need to fix it. Fixes bug 22737; bugfix on
13809 0.2.4.11-alpha. Fixes CID 1401591.
13811 o Build features (backport from 0.3.1.5-alpha):
13812 - Tor's repository now includes a Travis Continuous Integration (CI)
13813 configuration file (.travis.yml). This is meant to help new
13814 developers and contributors who fork Tor to a Github repository be
13815 better able to test their changes, and understand what we expect
13816 to pass. To use this new build feature, you must fork Tor to your
13817 Github account, then go into the "Integrations" menu in the
13818 repository settings for your fork and enable Travis, then push
13819 your changes. Closes ticket 22636.
13822 Changes in version 0.2.8.16 - 2017-10-25
13823 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
13824 series, including a bugfix for a crash issue that had affected relays
13825 under memory pressure. It also adds a new directory authority, Bastet.
13827 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13828 2018. If you need a release with long-term support, please stick with
13829 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13831 o Directory authority changes:
13832 - Add "Bastet" as a ninth directory authority to the default list.
13833 Closes ticket 23910.
13834 - The directory authority "Longclaw" has changed its IP address.
13835 Closes ticket 23592.
13837 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13838 - Fix a timing-based assertion failure that could occur when the
13839 circuit out-of-memory handler freed a connection's output buffer.
13840 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13842 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13843 - Remove longclaw's IPv6 address, as it will soon change. Authority
13844 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13845 3/8 directory authorities with IPv6 addresses, but there are also
13846 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13848 o Minor features (geoip):
13849 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13853 Changes in version 0.2.9.13 - 2017-10-25
13854 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
13855 series, including a bugfix for a crash issue that had affected relays
13856 under memory pressure. It also adds a new directory authority, Bastet.
13858 o Directory authority changes:
13859 - Add "Bastet" as a ninth directory authority to the default list.
13860 Closes ticket 23910.
13861 - The directory authority "Longclaw" has changed its IP address.
13862 Closes ticket 23592.
13864 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13865 - Fix a timing-based assertion failure that could occur when the
13866 circuit out-of-memory handler freed a connection's output buffer.
13867 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13869 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13870 - Remove longclaw's IPv6 address, as it will soon change. Authority
13871 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13872 3/8 directory authorities with IPv6 addresses, but there are also
13873 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13875 o Minor features (geoip):
13876 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13879 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13880 - When a directory authority rejects a descriptor or extrainfo with
13881 a given digest, mark that digest as undownloadable, so that we do
13882 not attempt to download it again over and over. We previously
13883 tried to avoid downloading such descriptors by other means, but we
13884 didn't notice if we accidentally downloaded one anyway. This
13885 behavior became problematic in 0.2.7.2-alpha, when authorities
13886 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13889 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13890 - Clear the address when node_get_prim_orport() returns early.
13891 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13893 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13894 - When running as a Windows service, set the ID of the main thread
13895 correctly. Failure to do so made us fail to send log messages to
13896 the controller in 0.2.1.16-rc, slowed down controller event
13897 delivery in 0.2.7.3-rc and later, and crash with an assertion
13898 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13899 Patch and diagnosis from "Vort".
13902 Changes in version 0.3.0.12 - 2017-10-25
13903 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
13904 series, including a bugfix for a crash issue that had affected relays
13905 under memory pressure. It also adds a new directory authority, Bastet.
13907 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13908 2018. If you need a release with long-term support, please stick with
13909 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13911 o Directory authority changes:
13912 - Add "Bastet" as a ninth directory authority to the default list.
13913 Closes ticket 23910.
13914 - The directory authority "Longclaw" has changed its IP address.
13915 Closes ticket 23592.
13917 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13918 - Fix a timing-based assertion failure that could occur when the
13919 circuit out-of-memory handler freed a connection's output buffer.
13920 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13922 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13923 - Remove longclaw's IPv6 address, as it will soon change. Authority
13924 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13925 3/8 directory authorities with IPv6 addresses, but there are also
13926 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13928 o Minor features (geoip):
13929 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13932 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13933 - When a directory authority rejects a descriptor or extrainfo with
13934 a given digest, mark that digest as undownloadable, so that we do
13935 not attempt to download it again over and over. We previously
13936 tried to avoid downloading such descriptors by other means, but we
13937 didn't notice if we accidentally downloaded one anyway. This
13938 behavior became problematic in 0.2.7.2-alpha, when authorities
13939 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13942 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13943 - Avoid a possible double close of a circuit by the intro point on
13944 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13945 bugfix on 0.3.0.1-alpha.
13947 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13948 - Clear the address when node_get_prim_orport() returns early.
13949 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13951 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13952 - When running as a Windows service, set the ID of the main thread
13953 correctly. Failure to do so made us fail to send log messages to
13954 the controller in 0.2.1.16-rc, slowed down controller event
13955 delivery in 0.2.7.3-rc and later, and crash with an assertion
13956 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13957 Patch and diagnosis from "Vort".
13960 Changes in version 0.3.1.8 - 2017-10-25
13961 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
13962 It includes several bugfixes, including a bugfix for a crash issue
13963 that had affected relays under memory pressure. It also adds
13964 a new directory authority, Bastet.
13966 o Directory authority changes:
13967 - Add "Bastet" as a ninth directory authority to the default list.
13968 Closes ticket 23910.
13969 - The directory authority "Longclaw" has changed its IP address.
13970 Closes ticket 23592.
13972 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13973 - Fix a timing-based assertion failure that could occur when the
13974 circuit out-of-memory handler freed a connection's output buffer.
13975 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13977 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13978 - Remove longclaw's IPv6 address, as it will soon change. Authority
13979 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13980 3/8 directory authorities with IPv6 addresses, but there are also
13981 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13983 o Minor features (geoip):
13984 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13987 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
13988 - Fix a compilation warning when building with zstd support on
13989 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13990 and fixed by Andreas Stieger.
13992 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
13993 - Handle a pathological case when decompressing Zstandard data when
13994 the output buffer size is zero. Fixes bug 23551; bugfix
13997 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
13998 - Remove the length limit on HTTP status lines that authorities can
13999 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
14001 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
14002 - Avoid a possible double close of a circuit by the intro point on
14003 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14004 bugfix on 0.3.0.1-alpha.
14006 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
14007 - Clear the address when node_get_prim_orport() returns early.
14008 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
14010 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
14011 - Fix additional channelpadding unit test failures by using mocked
14012 time instead of actual time for all tests. Fixes bug 23608; bugfix
14016 Changes in version 0.3.2.2-alpha - 2017-09-29
14017 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
14018 release fixes several minor bugs in the new scheduler and next-
14019 generation onion services; both features were newly added in the 0.3.2
14020 series. Other fixes in this alpha include several fixes for non-fatal
14021 tracebacks which would appear in logs.
14023 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
14024 alpha does not contain any substantial new features. Minor features
14025 include better testing and logging.
14027 The following comprises the complete list of changes included
14030 o Major bugfixes (relay, crash, assertion failure):
14031 - Fix a timing-based assertion failure that could occur when the
14032 circuit out-of-memory handler freed a connection's output buffer.
14033 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
14035 o Major bugfixes (scheduler):
14036 - If a channel is put into the scheduler's pending list, then it
14037 starts closing, and then if the scheduler runs before it finishes
14038 closing, the scheduler will get stuck trying to flush its cells
14039 while the lower layers refuse to cooperate. Fix that race
14040 condition by giving the scheduler an escape method. Fixes bug
14041 23676; bugfix on 0.3.2.1-alpha.
14043 o Minor features (build, compilation):
14044 - The "check-changes" feature is now part of the "make check" tests;
14045 we'll use it to try to prevent misformed changes files from
14046 accumulating. Closes ticket 23564.
14047 - Tor builds should now fail if there are any mismatches between the
14048 C type representing a configuration variable and the C type the
14049 data-driven parser uses to store a value there. Previously, we
14050 needed to check these by hand, which sometimes led to mistakes.
14051 Closes ticket 23643.
14053 o Minor features (directory authorities):
14054 - Remove longclaw's IPv6 address, as it will soon change. Authority
14055 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
14056 3/8 directory authorities with IPv6 addresses, but there are also
14057 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
14059 o Minor features (hidden service, circuit, logging):
14060 - Improve logging of many callsite in the circuit subsystem to print
14061 the circuit identifier(s).
14062 - Log when we cleanup an intro point from a service so we know when
14063 and for what reason it happened. Closes ticket 23604.
14065 o Minor features (logging):
14066 - Log more circuit information whenever we are about to try to
14067 package a relay cell on a circuit with a nonexistent n_chan.
14068 Attempt to diagnose ticket 8185.
14069 - Improve info-level log identification of particular circuits, to
14070 help with debugging. Closes ticket 23645.
14072 o Minor features (relay):
14073 - When choosing which circuits can be expired as unused, consider
14074 circuits from clients even if those clients used regular CREATE
14075 cells to make them; and do not consider circuits from relays even
14076 if they were made with CREATE_FAST. Part of ticket 22805.
14078 o Minor features (robustness):
14079 - Change several fatal assertions when flushing buffers into non-
14080 fatal assertions, to prevent any recurrence of 23690.
14082 o Minor features (spec conformance, bridge, diagnostic):
14083 - When handling the USERADDR command on an ExtOrPort, warn when the
14084 transports provides a USERADDR with no port. In a future version,
14085 USERADDR commands of this format may be rejected. Detects problems
14086 related to ticket 23080.
14088 o Minor features (testing):
14089 - Add a unit test to make sure that our own generated platform
14090 string will be accepted by directory authorities. Closes
14093 o Minor bugfixes (bootstrapping):
14094 - When warning about state file clock skew, report the correct
14095 direction for the detected skew. Fixes bug 23606; bugfix
14097 - Avoid an assertion failure when logging a state file clock skew
14098 very early in bootstrapping. Fixes bug 23607; bugfix
14101 o Minor bugfixes (build, compilation):
14102 - Fix a compilation warning when building with zstd support on
14103 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
14104 and fixed by Andreas Stieger.
14105 - When searching for OpenSSL, don't accept any OpenSSL library that
14106 lacks TLSv1_1_method(): Tor doesn't build with those versions.
14107 Additionally, look in /usr/local/opt/openssl, if it's present.
14108 These changes together repair the default build on OSX systems
14109 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
14111 o Minor bugfixes (compression):
14112 - Handle a pathological case when decompressing Zstandard data when
14113 the output buffer size is zero. Fixes bug 23551; bugfix
14116 o Minor bugfixes (documentation):
14117 - Fix manpage to not refer to the obsolete (and misspelled)
14118 UseEntryGuardsAsDirectoryGuards parameter in the description of
14119 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
14121 o Minor bugfixes (hidden service v3):
14122 - Don't log an assertion failure when we can't find the right
14123 information to extend to an introduction point. In rare cases,
14124 this could happen, causing a warning, even though tor would
14125 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
14126 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
14127 much bigger so the rendezvous point can't distinguish which hidden
14128 service protocol is being used. Fixes bug 23420; bugfix
14131 o Minor bugfixes (hidden service, relay):
14132 - Avoid a possible double close of a circuit by the intro point on
14133 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
14134 bugfix on 0.3.0.1-alpha.
14136 o Minor bugfixes (logging, relay shutdown, annoyance):
14137 - When a circuit is marked for close, do not attempt to package any
14138 cells for channels on that circuit. Previously, we would detect
14139 this condition lower in the call stack, when we noticed that the
14140 circuit had no attached channel, and log an annoying message.
14141 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
14143 o Minor bugfixes (scheduler):
14144 - When switching schedulers due to a consensus change, we didn't
14145 give the new scheduler a chance to react to the consensus. Fix
14146 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
14147 - Make the KISTSchedRunInterval option a non negative value. With
14148 this, the way to disable KIST through the consensus is to set it
14149 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
14150 - Only notice log the selected scheduler when we switch scheduler
14151 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
14152 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
14153 by a different tv_usec data type. Fixes bug 23575; bugfix
14155 - Make a hard exit if tor is unable to pick a scheduler which can
14156 happen if the user specifies a scheduler type that is not
14157 supported and not other types in Schedulers. Fixes bug 23581;
14158 bugfix on 0.3.2.1-alpha.
14159 - Properly initialize the scheduler last run time counter so it is
14160 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
14162 o Minor bugfixes (testing):
14163 - Capture and detect several "Result does not fit" warnings in unit
14164 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
14166 - Fix additional channelpadding unit test failures by using mocked
14167 time instead of actual time for all tests. Fixes bug 23608; bugfix
14169 - The removal of some old scheduler options caused some tests to
14170 fail on BSD systems. Assume current behavior is correct and make
14171 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
14173 o Code simplification and refactoring:
14174 - Remove various ways of testing circuits and connections for
14175 "clientness"; instead, favor channel_is_client(). Part of
14178 o Deprecated features:
14179 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
14180 now deprecated; they do not apply to relays, and they have had no
14181 effect on clients since 0.2.8.x. Closes ticket 19704.
14184 - HiddenServiceVersion man page entry wasn't mentioning the now
14185 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
14186 - Clarify that the Address option is entirely about setting an
14187 advertised IPv4 address. Closes ticket 18891.
14188 - Clarify the manpage's use of the term "address" to clarify what
14189 kind of address is intended. Closes ticket 21405.
14190 - Document that onion service subdomains are allowed, and ignored.
14191 Closes ticket 18736.
14194 Changes in version 0.3.2.1-alpha - 2017-09-18
14195 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
14196 includes support for our next-generation ("v3") onion service
14197 protocol, and adds a new circuit scheduler for more responsive
14198 forwarding decisions from relays. There are also numerous other small
14199 features and bugfixes here.
14201 Below are the changes since Tor 0.3.1.7.
14203 o Major feature (scheduler, channel):
14204 - Tor now uses new schedulers to decide which circuits should
14205 deliver cells first, in order to improve congestion at relays. The
14206 first type is called "KIST" ("Kernel Informed Socket Transport"),
14207 and is only available on Linux-like systems: it uses feedback from
14208 the kernel to prevent the kernel's TCP buffers from growing too
14209 full. The second new scheduler type is called "KISTLite": it
14210 behaves the same as KIST, but runs on systems without kernel
14211 support for inspecting TCP implementation details. The old
14212 scheduler is still available, under the name "Vanilla". To change
14213 the default scheduler preference order, use the new "Schedulers"
14214 option. (The default preference order is "KIST,KISTLite,Vanilla".)
14216 Matt Traudt implemented KIST, based on research by Rob Jansen,
14217 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
14218 more information, see the design paper at
14219 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
14220 followup implementation paper at https://arxiv.org/abs/1709.01044.
14221 Closes ticket 12541.
14223 o Major features (next-generation onion services):
14224 - Tor now supports the next-generation onion services protocol for
14225 clients and services! As part of this release, the core of
14226 proposal 224 has been implemented and is available for
14227 experimentation and testing by our users. This newer version of
14228 onion services ("v3") features many improvements over the legacy
14231 a) Better crypto (replaced SHA1/DH/RSA1024
14232 with SHA3/ed25519/curve25519)
14234 b) Improved directory protocol, leaking much less information to
14237 c) Improved directory protocol, with smaller surface for
14240 d) Better onion address security against impersonation.
14242 e) More extensible introduction/rendezvous protocol.
14244 f) A cleaner and more modular codebase.
14246 You can identify a next-generation onion address by its length:
14247 they are 56 characters long, as in
14248 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14250 In the future, we will release more options and features for v3
14251 onion services, but we first need a testing period, so that the
14252 current codebase matures and becomes more robust. Planned features
14253 include: offline keys, advanced client authorization, improved
14254 guard algorithms, and statistics. For full details, see
14257 Legacy ("v2") onion services will still work for the foreseeable
14258 future, and will remain the default until this new codebase gets
14259 tested and hardened. Service operators who want to experiment with
14260 the new system can use the 'HiddenServiceVersion 3' torrc
14261 directive along with the regular onion service configuration
14262 options. We will publish a blog post about this new feature
14265 o Major bugfixes (usability, control port):
14266 - Report trusted clock skew indications as bootstrap errors, so
14267 controllers can more easily alert users when their clocks are
14268 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14270 o Minor features (bug detection):
14271 - Log a warning message with a stack trace for any attempt to call
14272 get_options() during option validation. This pattern has caused
14273 subtle bugs in the past. Closes ticket 22281.
14275 o Minor features (client):
14276 - You can now use Tor as a tunneled HTTP proxy: use the new
14277 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14278 requests. Closes ticket 22407.
14279 - Add an extra check to make sure that we always use the newer guard
14280 selection code for picking our guards. Closes ticket 22779.
14281 - When downloading (micro)descriptors, don't split the list into
14282 multiple requests unless we want at least 32 descriptors.
14283 Previously, we split at 4, not 32, which led to significant
14284 overhead in HTTP request size and degradation in compression
14285 performance. Closes ticket 23220.
14287 o Minor features (command line):
14288 - Add a new commandline option, --key-expiration, which prints when
14289 the current signing key is going to expire. Implements ticket
14290 17639; patch by Isis Lovecruft.
14292 o Minor features (control port):
14293 - If an application tries to use the control port as an HTTP proxy,
14294 respond with a meaningful "This is the Tor control port" message,
14295 and log the event. Closes ticket 1667. Patch from Ravi
14297 - Provide better error message for GETINFO desc/(id|name) when not
14298 fetching router descriptors. Closes ticket 5847. Patch by
14300 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14301 whether Tor will try to download router descriptors and
14302 microdescriptors respectively. Closes ticket 22684.
14303 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14304 so controllers can tell whether the geoip databases are loaded.
14305 Closes ticket 23237.
14306 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14307 events. Closes ticket 19254. Patch by "DonnchaC".
14309 o Minor features (development support):
14310 - Developers can now generate a call-graph for Tor using the
14311 "calltool" python program, which post-processes object dumps. It
14312 should work okay on many Linux and OSX platforms, and might work
14313 elsewhere too. To run it, install calltool from
14314 https://gitweb.torproject.org/user/nickm/calltool.git and run
14315 "make callgraph". Closes ticket 19307.
14317 o Minor features (ed25519):
14318 - Add validation function to checks for torsion components in
14319 ed25519 public keys, used by prop224 client-side code. Closes
14320 ticket 22006. Math help by Ian Goldberg.
14322 o Minor features (exit relay, DNS):
14323 - Improve the clarity and safety of the log message from evdns when
14324 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14326 o Minor features (integration, hardening):
14327 - Add a new NoExec option to prevent Tor from running other
14328 programs. When this option is set to 1, Tor will never try to run
14329 another program, regardless of the settings of
14330 PortForwardingHelper, ClientTransportPlugin, or
14331 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14332 without restarting Tor. Closes ticket 22976.
14334 o Minor features (logging):
14335 - Improve the warning message for specifying a relay by nickname.
14336 The previous message implied that nickname registration was still
14337 part of the Tor network design, which it isn't. Closes
14339 - If the sandbox filter fails to load, suggest to the user that
14340 their kernel might not support seccomp2. Closes ticket 23090.
14342 o Minor features (portability):
14343 - Check at configure time whether uint8_t is the same type as
14344 unsigned char. Lots of existing code already makes this
14345 assumption, and there could be strict aliasing issues if the
14346 assumption is violated. Closes ticket 22410.
14348 o Minor features (relay, configuration):
14349 - Reject attempts to use relative file paths when RunAsDaemon is
14350 set. Previously, Tor would accept these, but the directory-
14351 changing step of RunAsDaemon would give strange and/or confusing
14352 results. Closes ticket 22731.
14354 o Minor features (startup, safety):
14355 - When configured to write a PID file, Tor now exits if it is unable
14356 to do so. Previously, it would warn and continue. Closes
14359 o Minor features (static analysis):
14360 - The BUG() macro has been changed slightly so that Coverity no
14361 longer complains about dead code if the bug is impossible. Closes
14364 o Minor features (testing):
14365 - The default chutney network tests now include tests for the v3
14366 hidden service design. Make sure you have the latest version of
14367 chutney if you want to run these. Closes ticket 22437.
14368 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14369 service descriptor. Closes ticket 15554.
14371 o Minor bugfixes (certificate handling):
14372 - Fix a time handling bug in Tor certificates set to expire after
14373 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14374 Coverity as CID 1415728.
14376 o Minor bugfixes (client, usability):
14377 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14378 SOCKS4a requests that contain IP address strings, even when
14379 SafeSocks in enabled, as this prevents user from connecting to
14380 known IP addresses without relying on DNS for resolving. SafeSocks
14381 still rejects SOCKS connections that connect to IP addresses when
14382 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14383 bugfix on Tor 0.2.6.2-alpha.
14385 o Minor bugfixes (code correctness):
14386 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14387 Previously we used ntohs(), which happens to behave the same on
14388 all the platforms we support, but which isn't really correct.
14389 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14390 - For defense-in-depth, make the controller's write_escaped_data()
14391 function robust to extremely long inputs. Fixes bug 19281; bugfix
14392 on 0.1.1.1-alpha. Reported by Guido Vranken.
14394 o Minor bugfixes (compilation):
14395 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14396 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14398 o Minor bugfixes (consensus expiry):
14399 - Check for adequate directory information correctly. Previously, Tor
14400 would reconsider whether it had sufficient directory information
14401 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14403 o Minor bugfixes (directory protocol):
14404 - Directory servers now include a "Date:" http header for response
14405 codes other than 200. Clients starting with a skewed clock and a
14406 recent consensus were getting "304 Not modified" responses from
14407 directory authorities, so without the Date header, the client
14408 would never hear about a wrong clock. Fixes bug 23499; bugfix
14410 - Make clients wait for 6 seconds before trying to download a
14411 consensus from an authority. Fixes bug 17750; bugfix
14414 o Minor bugfixes (DoS-resistance):
14415 - If future code asks if there are any running bridges, without
14416 checking if bridges are enabled, log a BUG warning rather than
14417 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14419 o Minor bugfixes (format strictness):
14420 - Restrict several data formats to decimal. Previously, the
14421 BuildTimeHistogram entries in the state file, the "bw=" entries in
14422 the bandwidth authority file, and the process IDs passed to the
14423 __OwningControllerProcess option could all be specified in hex or
14424 octal as well as in decimal. This was not an intentional feature.
14425 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14428 o Minor bugfixes (heartbeat):
14429 - If we fail to write a heartbeat message, schedule a retry for the
14430 minimum heartbeat interval number of seconds in the future. Fixes
14431 bug 19476; bugfix on 0.2.3.1-alpha.
14433 o Minor bugfixes (linux seccomp2 sandbox, logging):
14434 - Fix some messages on unexpected errors from the seccomp2 library.
14435 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14437 o Minor bugfixes (logging):
14438 - Remove duplicate log messages regarding opening non-local
14439 SocksPorts upon parsing config and opening listeners at startup.
14440 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14441 - Use a more comprehensible log message when telling the user
14442 they've excluded every running exit node. Fixes bug 7890; bugfix
14444 - When logging the number of descriptors we intend to download per
14445 directory request, do not log a number higher than then the number
14446 of descriptors we're fetching in total. Fixes bug 19648; bugfix
14448 - When warning about a directory owned by the wrong user, log the
14449 actual name of the user owning the directory. Previously, we'd log
14450 the name of the process owner twice. Fixes bug 23487; bugfix
14452 - The tor specification says hop counts are 1-based, so fix two log
14453 messages that mistakenly logged 0-based hop counts. Fixes bug
14454 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
14455 Credit to Xiaofan Li for reporting this issue.
14457 o Minor bugfixes (portability):
14458 - Stop using the PATH_MAX variable, which is not defined on GNU
14459 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
14461 o Minor bugfixes (relay):
14462 - When uploading our descriptor for the first time after startup,
14463 report the reason for uploading as "Tor just started" rather than
14464 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
14465 - Avoid unnecessary calls to directory_fetches_from_authorities() on
14466 relays, to prevent spurious address resolutions and descriptor
14467 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
14468 bugfix on in 0.2.8.1-alpha.
14470 o Minor bugfixes (tests):
14471 - Fix a broken unit test for the OutboundAddress option: the parsing
14472 function was never returning an error on failure. Fixes bug 23366;
14473 bugfix on 0.3.0.3-alpha.
14474 - Fix a signed-integer overflow in the unit tests for
14475 dir/download_status_random_backoff, which was untriggered until we
14476 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
14478 o Minor bugfixes (usability, control port):
14479 - Stop making an unnecessary routerlist check in NETINFO clock skew
14480 detection; this was preventing clients from reporting NETINFO clock
14481 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
14483 o Code simplification and refactoring:
14484 - Extract the code for handling newly-open channels into a separate
14485 function from the general code to handle channel state
14486 transitions. This change simplifies our callgraph, reducing the
14487 size of the largest strongly connected component by roughly a
14488 factor of two. Closes ticket 22608.
14489 - Remove dead code for largely unused statistics on the number of
14490 times we've attempted various public key operations. Fixes bug
14491 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
14492 - Remove several now-obsolete functions for asking about old
14493 variants directory authority status. Closes ticket 22311; patch
14495 - Remove some of the code that once supported "Named" and "Unnamed"
14496 routers. Authorities no longer vote for these flags. Closes
14498 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
14499 and old hidden services, to indicate that they aren't suitable for
14500 new protocols or formats. Closes ticket 23026.
14501 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
14502 22521. Patch from Neel Chauhan.
14503 - Split the enormous circuit_send_next_onion_skin() function into
14504 multiple subfunctions. Closes ticket 22804.
14505 - Split the portions of the buffer.c module that handle particular
14506 protocols into separate modules. Part of ticket 23149.
14507 - Use our test macros more consistently, to produce more useful
14508 error messages when our unit tests fail. Add coccinelle patches to
14509 allow us to re-check for test macro uses. Closes ticket 22497.
14511 o Deprecated features:
14512 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
14513 only applies to direct unencrypted HTTP connections to your
14514 directory server, which your Tor probably isn't using. Closes
14518 - Clarify in the manual that "Sandbox 1" is only supported on Linux
14519 kernels. Closes ticket 22677.
14520 - Document all values of PublishServerDescriptor in the manpage.
14521 Closes ticket 15645.
14522 - Improve the documentation for the directory port part of the
14523 DirAuthority line. Closes ticket 20152.
14524 - Restore documentation for the authorities' "approved-routers"
14525 file. Closes ticket 21148.
14527 o Removed features:
14528 - The AllowDotExit option has been removed as unsafe. It has been
14529 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
14530 - The ClientDNSRejectInternalAddresses flag can no longer be set on
14531 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
14532 Closes ticket 21031.
14533 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
14534 nobody was using it any longer. Closes ticket 22377.
14537 Changes in version 0.2.8.15 - 2017-09-18
14538 Tor 0.2.8.15 backports a collection of bugfixes from later
14541 Most significantly, it includes a fix for TROVE-2017-008, a
14542 security bug that affects hidden services running with the
14543 SafeLogging option disabled. For more information, see
14544 https://trac.torproject.org/projects/tor/ticket/23490
14546 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
14547 2018. We suggest that you upgrade to the latest stable release if
14548 possible. If you can't, we recommend that you upgrade at least to
14549 0.2.9, which will be supported until 2020.
14551 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14552 - Avoid an assertion failure bug affecting our implementation of
14553 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14554 handling of "0xx" differs from what we had expected. Fixes bug
14555 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14558 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14561 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14562 - Backport a fix for an "unused variable" warning that appeared
14563 in some versions of mingw. Fixes bug 22838; bugfix on
14566 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14567 - Fix a memset() off the end of an array when packing cells. This
14568 bug should be harmless in practice, since the corrupted bytes are
14569 still in the same structure, and are always padding bytes,
14570 ignored, or immediately overwritten, depending on compiler
14571 behavior. Nevertheless, because the memset()'s purpose is to make
14572 sure that any other cell-handling bugs can't expose bytes to the
14573 network, we need to fix it. Fixes bug 22737; bugfix on
14574 0.2.4.11-alpha. Fixes CID 1401591.
14576 o Build features (backport from 0.3.1.5-alpha):
14577 - Tor's repository now includes a Travis Continuous Integration (CI)
14578 configuration file (.travis.yml). This is meant to help new
14579 developers and contributors who fork Tor to a Github repository be
14580 better able to test their changes, and understand what we expect
14581 to pass. To use this new build feature, you must fork Tor to your
14582 Github account, then go into the "Integrations" menu in the
14583 repository settings for your fork and enable Travis, then push
14584 your changes. Closes ticket 22636.
14587 Changes in version 0.2.9.12 - 2017-09-18
14588 Tor 0.2.9.12 backports a collection of bugfixes from later
14591 Most significantly, it includes a fix for TROVE-2017-008, a
14592 security bug that affects hidden services running with the
14593 SafeLogging option disabled. For more information, see
14594 https://trac.torproject.org/projects/tor/ticket/23490
14596 o Major features (security, backport from 0.3.0.2-alpha):
14597 - Change the algorithm used to decide DNS TTLs on client and server
14598 side, to better resist DNS-based correlation attacks like the
14599 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
14600 Feamster. Now relays only return one of two possible DNS TTL
14601 values, and clients are willing to believe DNS TTL values up to 3
14602 hours long. Closes ticket 19769.
14604 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
14605 - Fix a rare crash when sending a begin cell on a circuit whose
14606 linked directory connection had already been closed. Fixes bug
14607 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14609 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
14610 - Fix a bug that prevented exit nodes from caching DNS records for
14611 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
14613 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14614 - Fix a typo that had prevented TPROXY-based transparent proxying
14615 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14616 Patch from "d4fq0fQAgoJ".
14618 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14619 - Avoid an assertion failure bug affecting our implementation of
14620 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14621 handling of "0xx" differs from what we had expected. Fixes bug
14622 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14624 o Minor features (code style, backport from 0.3.1.3-alpha):
14625 - Add "Falls through" comments to our codebase, in order to silence
14626 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14627 Stieger. Closes ticket 22446.
14629 o Minor features (geoip):
14630 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14633 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
14634 - Roll over monthly accounting at the configured hour and minute,
14635 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14636 Found by Andrey Karpov with PVS-Studio.
14638 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
14639 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14640 bugfix on 0.2.8.1-alpha.
14641 - Fix warnings when building with libscrypt and openssl scrypt support
14642 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14643 - When building with certain versions the mingw C header files, avoid
14644 float-conversion warnings when calling the C functions isfinite(),
14645 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
14647 o Minor bugfixes (compilation, backport from 0.3.1.7):
14648 - Avoid compiler warnings in the unit tests for running tor_sscanf()
14649 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14651 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14652 - Backport a fix for an "unused variable" warning that appeared
14653 in some versions of mingw. Fixes bug 22838; bugfix on
14656 o Minor bugfixes (controller, backport from 0.3.1.7):
14657 - Do not crash when receiving a HSPOST command with an empty body.
14658 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14659 - Do not crash when receiving a POSTDESCRIPTOR command with an
14660 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14662 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14663 - Avoid Coverity build warnings related to our BUG() macro. By
14664 default, Coverity treats BUG() as the Linux kernel does: an
14665 instant abort(). We need to override that so our BUG() macro
14666 doesn't prevent Coverity from analyzing functions that use it.
14667 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14669 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14670 - Fix a memset() off the end of an array when packing cells. This
14671 bug should be harmless in practice, since the corrupted bytes are
14672 still in the same structure, and are always padding bytes,
14673 ignored, or immediately overwritten, depending on compiler
14674 behavior. Nevertheless, because the memset()'s purpose is to make
14675 sure that any other cell-handling bugs can't expose bytes to the
14676 network, we need to fix it. Fixes bug 22737; bugfix on
14677 0.2.4.11-alpha. Fixes CID 1401591.
14679 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14680 - When setting the maximum number of connections allowed by the OS,
14681 always allow some extra file descriptors for other files. Fixes
14682 bug 22797; bugfix on 0.2.0.10-alpha.
14684 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14685 - Avoid a sandbox failure when trying to re-bind to a socket and
14686 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14688 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14689 - Permit the fchmod system call, to avoid crashing on startup when
14690 starting with the seccomp2 sandbox and an unexpected set of
14691 permissions on the data directory or its contents. Fixes bug
14692 22516; bugfix on 0.2.5.4-alpha.
14694 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
14695 - Avoid a double-marked-circuit warning that could happen when we
14696 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14699 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14700 - Reject version numbers with non-numeric prefixes (such as +, -, or
14701 whitespace). Disallowing whitespace prevents differential version
14702 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14703 and part of 21508; bugfix on 0.0.8pre1.
14705 o Build features (backport from 0.3.1.5-alpha):
14706 - Tor's repository now includes a Travis Continuous Integration (CI)
14707 configuration file (.travis.yml). This is meant to help new
14708 developers and contributors who fork Tor to a Github repository be
14709 better able to test their changes, and understand what we expect
14710 to pass. To use this new build feature, you must fork Tor to your
14711 Github account, then go into the "Integrations" menu in the
14712 repository settings for your fork and enable Travis, then push
14713 your changes. Closes ticket 22636.
14716 Changes in version 0.3.0.11 - 2017-09-18
14717 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
14720 Most significantly, it includes a fix for TROVE-2017-008, a
14721 security bug that affects hidden services running with the
14722 SafeLogging option disabled. For more information, see
14723 https://trac.torproject.org/projects/tor/ticket/23490
14725 o Minor features (code style, backport from 0.3.1.7):
14726 - Add "Falls through" comments to our codebase, in order to silence
14727 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14728 Stieger. Closes ticket 22446.
14731 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14734 o Minor bugfixes (compilation, backport from 0.3.1.7):
14735 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14736 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14738 o Minor bugfixes (controller, backport from 0.3.1.7):
14739 - Do not crash when receiving a HSPOST command with an empty body.
14740 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14741 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14742 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14744 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14745 - When setting the maximum number of connections allowed by the OS,
14746 always allow some extra file descriptors for other files. Fixes
14747 bug 22797; bugfix on 0.2.0.10-alpha.
14749 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
14750 - Remove a forgotten debugging message when an introduction point
14751 successfully establishes a hidden service prop224 circuit with
14753 - Change three other log_warn() for an introduction point to
14754 protocol warnings, because they can be failure from the network
14755 and are not relevant to the operator. Fixes bug 23078; bugfix on
14756 0.3.0.1-alpha and 0.3.0.2-alpha.
14759 Changes in version 0.3.1.7 - 2017-09-18
14760 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
14762 With the 0.3.1 series, Tor now serves and downloads directory
14763 information in more compact formats, to save on bandwidth overhead. It
14764 also contains a new padding system to resist netflow-based traffic
14765 analysis, and experimental support for building parts of Tor in Rust
14766 (though no parts of Tor are in Rust yet). There are also numerous
14767 small features, bugfixes on earlier release series, and groundwork for
14768 the hidden services revamp of 0.3.2.
14770 This release also includes a fix for TROVE-2017-008, a security bug
14771 that affects hidden services running with the SafeLogging option
14772 disabled. For more information, see
14773 https://trac.torproject.org/projects/tor/ticket/23490
14775 Per our stable release policy, we plan to support each stable release
14776 series for at least the next nine months, or for three months after
14777 the first stable release of the next series: whichever is longer. If
14778 you need a release with long-term support, we recommend that you stay
14779 with the 0.2.9 series.
14781 Below is a list of the changes since 0.3.1.6-rc. For a list of all
14782 changes since 0.3.0, see the ReleaseNotes file.
14784 o Major bugfixes (security, hidden services, loggging):
14785 - Fix a bug where we could log uninitialized stack when a certain
14786 hidden service error occurred while SafeLogging was disabled.
14787 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
14788 TROVE-2017-008 and CVE-2017-0380.
14790 o Minor features (defensive programming):
14791 - Create a pair of consensus parameters, nf_pad_tor2web and
14792 nf_pad_single_onion, to disable netflow padding in the consensus
14793 for non-anonymous connections in case the overhead is high. Closes
14796 o Minor features (diagnostic):
14797 - Add a stack trace to the bug warnings that can be logged when
14798 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
14799 attempt for bug 23105.
14801 o Minor features (geoip):
14802 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14805 o Minor bugfixes (compilation):
14806 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14807 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14809 o Minor bugfixes (controller):
14810 - Do not crash when receiving a HSPOST command with an empty body.
14811 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14812 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14813 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14815 o Minor bugfixes (relay):
14816 - Inform the geoip and rephist modules about all requests, even on
14817 relays that are only fetching microdescriptors. Fixes a bug
14818 related to 21585; bugfix on 0.3.0.1-alpha.
14820 o Minor bugfixes (unit tests):
14821 - Fix a channelpadding unit test failure on slow systems by using
14822 mocked time instead of actual time. Fixes bug 23077; bugfix
14826 Changes in version 0.3.1.6-rc - 2017-09-05
14827 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
14828 release series, including a bug that produced weird behavior on
14829 Windows directory caches.
14831 This is the first release candidate in the Tor 0.3.1 series. If we
14832 find no new bugs or regressions here, the first stable 0.3.1 release
14833 will be nearly identical to it.
14835 o Major bugfixes (windows, directory cache):
14836 - On Windows, do not try to delete cached consensus documents and
14837 diffs before they are unmapped from memory--Windows won't allow
14838 that. Instead, allow the consensus cache directory to grow larger,
14839 to hold files that might need to stay around longer. Fixes bug
14840 22752; bugfix on 0.3.1.1-alpha.
14842 o Minor features (directory authority):
14843 - Improve the message that authorities report to relays that present
14844 RSA/Ed25519 keypairs that conflict with previously pinned keys.
14845 Closes ticket 22348.
14847 o Minor features (geoip):
14848 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
14851 o Minor features (testing):
14852 - Add more tests for compression backend initialization. Closes
14855 o Minor bugfixes (directory cache):
14856 - Fix a memory leak when recovering space in the consensus cache.
14857 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
14859 o Minor bugfixes (hidden service):
14860 - Increase the number of circuits that a service is allowed to
14861 open over a specific period of time. The value was lower than it
14862 should be (8 vs 12) in the normal case of 3 introduction points.
14863 Fixes bug 22159; bugfix on 0.3.0.5-rc.
14864 - Fix a BUG warning during HSv3 descriptor decoding that could be
14865 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
14866 on 0.3.0.1-alpha. Bug found by "haxxpop".
14867 - Rate-limit the log messages if we exceed the maximum number of
14868 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
14870 o Minor bugfixes (logging, relay):
14871 - Remove a forgotten debugging message when an introduction point
14872 successfully establishes a hidden service prop224 circuit with
14874 - Change three other log_warn() for an introduction point to
14875 protocol warnings, because they can be failure from the network
14876 and are not relevant to the operator. Fixes bug 23078; bugfix on
14877 0.3.0.1-alpha and 0.3.0.2-alpha.
14879 o Minor bugfixes (relay):
14880 - When a relay is not running as a directory cache, it will no
14881 longer generate compressed consensuses and consensus diff
14882 information. Previously, this was a waste of disk and CPU. Fixes
14883 bug 23275; bugfix on 0.3.1.1-alpha.
14885 o Minor bugfixes (robustness, error handling):
14886 - Improve our handling of the cases where OpenSSL encounters a
14887 memory error while encoding keys and certificates. We haven't
14888 observed these errors in the wild, but if they do happen, we now
14889 detect and respond better. Fixes bug 19418; bugfix on all versions
14890 of Tor. Reported by Guido Vranken.
14892 o Minor bugfixes (stability):
14893 - Avoid crashing on a double-free when unable to load or process an
14894 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
14895 with the clang static analyzer.
14897 o Minor bugfixes (testing):
14898 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
14899 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
14900 - Port the hs_ntor handshake test to work correctly with recent
14901 versions of the pysha3 module. Fixes bug 23071; bugfix
14904 o Minor bugfixes (Windows service):
14905 - When running as a Windows service, set the ID of the main thread
14906 correctly. Failure to do so made us fail to send log messages to
14907 the controller in 0.2.1.16-rc, slowed down controller event
14908 delivery in 0.2.7.3-rc and later, and crash with an assertion
14909 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14910 Patch and diagnosis from "Vort".
14913 Changes in version 0.3.0.10 - 2017-08-02
14914 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
14915 from the current Tor alpha series. OpenBSD users and TPROXY users
14916 should upgrade; others are probably okay sticking with 0.3.0.9.
14918 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
14919 - Tor's repository now includes a Travis Continuous Integration (CI)
14920 configuration file (.travis.yml). This is meant to help new
14921 developers and contributors who fork Tor to a Github repository be
14922 better able to test their changes, and understand what we expect
14923 to pass. To use this new build feature, you must fork Tor to your
14924 Github account, then go into the "Integrations" menu in the
14925 repository settings for your fork and enable Travis, then push
14926 your changes. Closes ticket 22636.
14928 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14929 - Fix a typo that had prevented TPROXY-based transparent proxying
14930 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14931 Patch from "d4fq0fQAgoJ".
14933 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14934 - Avoid an assertion failure bug affecting our implementation of
14935 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14936 handling of "0xbar" differs from what we had expected. Fixes bug
14937 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14939 o Minor features (backport from 0.3.1.5-alpha):
14940 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14943 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
14944 - Roll over monthly accounting at the configured hour and minute,
14945 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14946 Found by Andrey Karpov with PVS-Studio.
14948 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
14949 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14950 bugfix on 0.2.8.1-alpha.
14951 - Fix warnings when building with libscrypt and openssl scrypt
14952 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14953 - When building with certain versions of the mingw C header files,
14954 avoid float-conversion warnings when calling the C functions
14955 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14958 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14959 - Backport a fix for an "unused variable" warning that appeared
14960 in some versions of mingw. Fixes bug 22838; bugfix on
14963 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14964 - Avoid Coverity build warnings related to our BUG() macro. By
14965 default, Coverity treats BUG() as the Linux kernel does: an
14966 instant abort(). We need to override that so our BUG() macro
14967 doesn't prevent Coverity from analyzing functions that use it.
14968 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14970 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
14971 - When rejecting a router descriptor for running an obsolete version
14972 of Tor without ntor support, warn about the obsolete tor version,
14973 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14975 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14976 - Avoid a sandbox failure when trying to re-bind to a socket and
14977 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14979 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
14980 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14981 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14984 Changes in version 0.3.1.5-alpha - 2017-08-01
14985 Tor 0.3.1.5-alpha improves the performance of consensus diff
14986 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
14987 several other bugs. If no serious bugs are found in this version, the
14988 next version will be a release candidate.
14990 This release also marks the end of support for the Tor 0.2.4.x,
14991 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
14992 further bug or security fixes. Anyone still running or distributing
14993 one of those versions should upgrade.
14995 o Major features (build system, continuous integration):
14996 - Tor's repository now includes a Travis Continuous Integration (CI)
14997 configuration file (.travis.yml). This is meant to help new
14998 developers and contributors who fork Tor to a Github repository be
14999 better able to test their changes, and understand what we expect
15000 to pass. To use this new build feature, you must fork Tor to your
15001 Github account, then go into the "Integrations" menu in the
15002 repository settings for your fork and enable Travis, then push
15003 your changes. Closes ticket 22636.
15005 o Major bugfixes (openbsd, denial-of-service):
15006 - Avoid an assertion failure bug affecting our implementation of
15007 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
15008 handling of "0xbar" differs from what we had expected. Fixes bug
15009 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
15011 o Major bugfixes (relay, performance):
15012 - Perform circuit handshake operations at a higher priority than we
15013 use for consensus diff creation and compression. This should
15014 prevent circuits from starving when a relay or bridge receives a
15015 new consensus, especially on lower-powered machines. Fixes bug
15016 22883; bugfix on 0.3.1.1-alpha.
15018 o Minor features (bridge authority):
15019 - Add "fingerprint" lines to the networkstatus-bridges file produced
15020 by bridge authorities. Closes ticket 22207.
15022 o Minor features (directory cache, consensus diff):
15023 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
15024 operators with low-resource environments to adjust the number of
15025 consensuses they'll store and generate diffs from. Most cache
15026 operators should leave it unchanged. Helps to work around
15029 o Minor features (geoip):
15030 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
15033 o Minor features (relay, performance):
15034 - Always start relays with at least two worker threads, to prevent
15035 priority inversion on slow tasks. Part of the fix for bug 22883.
15036 - Allow background work to be queued with different priorities, so
15037 that a big pile of slow low-priority jobs will not starve out
15038 higher priority jobs. This lays the groundwork for a fix for
15041 o Minor bugfixes (build system, rust):
15042 - Fix a problem where Rust toolchains were not being found when
15043 building without --enable-cargo-online-mode, due to setting the
15044 $HOME environment variable instead of $CARGO_HOME. Fixes bug
15045 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
15047 o Minor bugfixes (compatibility, zstd):
15048 - Write zstd epilogues correctly when the epilogue requires
15049 reallocation of the output buffer, even with zstd 1.3.0.
15050 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
15051 22927; bugfix on 0.3.1.1-alpha.
15053 o Minor bugfixes (compilation warnings):
15054 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
15055 22915; bugfix on 0.2.8.1-alpha.
15056 - Fix warnings when building with libscrypt and openssl scrypt
15057 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
15058 - Compile correctly when both openssl 1.1.0 and libscrypt are
15059 detected. Previously this would cause an error. Fixes bug 22892;
15060 bugfix on 0.3.1.1-alpha.
15061 - When building with certain versions of the mingw C header files,
15062 avoid float-conversion warnings when calling the C functions
15063 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
15066 o Minor bugfixes (coverity build support):
15067 - Avoid Coverity build warnings related to our BUG() macro. By
15068 default, Coverity treats BUG() as the Linux kernel does: an
15069 instant abort(). We need to override that so our BUG() macro
15070 doesn't prevent Coverity from analyzing functions that use it.
15071 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
15073 o Minor bugfixes (directory authority):
15074 - When a directory authority rejects a descriptor or extrainfo with
15075 a given digest, mark that digest as undownloadable, so that we do
15076 not attempt to download it again over and over. We previously
15077 tried to avoid downloading such descriptors by other means, but we
15078 didn't notice if we accidentally downloaded one anyway. This
15079 behavior became problematic in 0.2.7.2-alpha, when authorities
15080 began pinning Ed25519 keys. Fixes bug 22349; bugfix
15083 o Minor bugfixes (error reporting, windows):
15084 - When formatting Windows error messages, use the English format to
15085 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
15088 o Minor bugfixes (file limits, osx):
15089 - When setting the maximum number of connections allowed by the OS,
15090 always allow some extra file descriptors for other files. Fixes
15091 bug 22797; bugfix on 0.2.0.10-alpha.
15093 o Minor bugfixes (linux seccomp2 sandbox):
15094 - Avoid a sandbox failure when trying to re-bind to a socket and
15095 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
15097 o Minor bugfixes (memory leaks):
15098 - Fix a small memory leak when validating a configuration that uses
15099 two or more AF_UNIX sockets for the same port type. Fixes bug
15100 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
15102 o Minor bugfixes (unit tests):
15103 - test_consdiff_base64cmp would fail on OS X because while OS X
15104 follows the standard of (less than zero/zero/greater than zero),
15105 it doesn't follow the convention of (-1/0/+1). Make the test
15106 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
15107 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
15108 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
15111 Changes in version 0.3.1.4-alpha - 2017-06-29
15112 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
15113 to use a guard that was in the same network family as a chosen exit
15114 relay. This is a security regression; all clients running earlier
15115 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
15118 This release also fixes several other bugs introduced in 0.3.0.x
15119 and 0.3.1.x, including others that can affect bandwidth usage
15122 o New dependencies:
15123 - To build with zstd and lzma support, Tor now requires the
15124 pkg-config tool at build time. (This requirement was new in
15125 0.3.1.1-alpha, but was not noted at the time. Noting it here to
15126 close ticket 22623.)
15128 o Major bugfixes (path selection, security):
15129 - When choosing which guard to use for a circuit, avoid the exit's
15130 family along with the exit itself. Previously, the new guard
15131 selection logic avoided the exit, but did not consider its family.
15132 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15133 006 and CVE-2017-0377.
15135 o Major bugfixes (compression, zstd):
15136 - Correctly detect a full buffer when decompressing a large zstd-
15137 compressed input. Previously, we would sometimes treat a full
15138 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
15140 o Major bugfixes (directory protocol):
15141 - Ensure that we send "304 Not modified" as HTTP status code when a
15142 client is attempting to fetch a consensus or consensus diff, and
15143 the best one we can send them is one they already have. Fixes bug
15144 22702; bugfix on 0.3.1.1-alpha.
15146 o Major bugfixes (entry guards):
15147 - When starting with an old consensus, do not add new entry guards
15148 unless the consensus is "reasonably live" (under 1 day old). Fixes
15149 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15151 o Minor features (bug mitigation, diagnostics, logging):
15152 - Avoid an assertion failure, and log a better error message, when
15153 unable to remove a file from the consensus cache on Windows.
15154 Attempts to mitigate and diagnose bug 22752.
15156 o Minor features (geoip):
15157 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15160 o Minor bugfixes (compression):
15161 - When compressing or decompressing a buffer, check for a failure to
15162 create a compression object. Fixes bug 22626; bugfix
15164 - When decompressing a buffer, check for extra data after the end of
15165 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
15166 - When decompressing an object received over an anonymous directory
15167 connection, if we have already decompressed it using an acceptable
15168 compression method, do not reject it for looking like an
15169 unacceptable compression method. Fixes part of bug 22670; bugfix
15171 - When serving directory votes compressed with zlib, do not claim to
15172 have compressed them with zstd. Fixes bug 22669; bugfix
15174 - When spooling compressed data to an output buffer, don't try to
15175 spool more data when there is no more data to spool and we are not
15176 trying to flush the input. Previously, we would sometimes launch
15177 compression requests with nothing to do, which interferes with our
15178 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
15180 o Minor bugfixes (defensive programming):
15181 - Detect and break out of infinite loops in our compression code. We
15182 don't think that any such loops exist now, but it's best to be
15183 safe. Closes ticket 22672.
15184 - Fix a memset() off the end of an array when packing cells. This
15185 bug should be harmless in practice, since the corrupted bytes are
15186 still in the same structure, and are always padding bytes,
15187 ignored, or immediately overwritten, depending on compiler
15188 behavior. Nevertheless, because the memset()'s purpose is to make
15189 sure that any other cell-handling bugs can't expose bytes to the
15190 network, we need to fix it. Fixes bug 22737; bugfix on
15191 0.2.4.11-alpha. Fixes CID 1401591.
15193 o Minor bugfixes (linux seccomp2 sandbox):
15194 - Permit the fchmod system call, to avoid crashing on startup when
15195 starting with the seccomp2 sandbox and an unexpected set of
15196 permissions on the data directory or its contents. Fixes bug
15197 22516; bugfix on 0.2.5.4-alpha.
15198 - Fix a crash in the LZMA module, when the sandbox was enabled, and
15199 liblzma would allocate more than 16 MB of memory. We solve this by
15200 bumping the mprotect() limit in the sandbox module from 16 MB to
15201 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
15203 o Minor bugfixes (logging):
15204 - When decompressing, do not warn if we fail to decompress using a
15205 compression method that we merely guessed. Fixes part of bug
15206 22670; bugfix on 0.1.1.14-alpha.
15207 - When decompressing, treat mismatch between content-encoding and
15208 actual compression type as a protocol warning. Fixes part of bug
15209 22670; bugfix on 0.1.1.9-alpha.
15210 - Downgrade "assigned_to_cpuworker failed" message to info-level
15211 severity. In every case that can reach it, either a better warning
15212 has already been logged, or no warning is warranted. Fixes bug
15213 22356; bugfix on 0.2.6.3-alpha.
15214 - Demote a warn that was caused by libevent delays to info if
15215 netflow padding is less than 4.5 seconds late, or to notice
15216 if it is more (4.5 seconds is the amount of time that a netflow
15217 record might be emitted after, if we chose the maximum timeout).
15218 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
15220 o Minor bugfixes (process behavior):
15221 - When exiting because of an error, always exit with a nonzero exit
15222 status. Previously, we would fail to report an error in our exit
15223 status in cases related to __OwningControllerProcess failure,
15224 lockfile contention, and Ed25519 key initialization. Fixes bug
15225 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
15226 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
15230 - Add a manpage description for the key-pinning-journal file. Closes
15232 - Correctly note that bandwidth accounting values are stored in the
15233 state file, and the bw_accounting file is now obsolete. Closes
15235 - Document more of the files in the Tor data directory, including
15236 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15237 approved-routers, sr-random, and diff-cache. Found while fixing
15241 Changes in version 0.3.0.9 - 2017-06-29
15242 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15243 to use a guard that was in the same network family as a chosen exit
15244 relay. This is a security regression; all clients running earlier
15245 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15248 This release also backports several other bugfixes from the 0.3.1.x
15251 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15252 - When choosing which guard to use for a circuit, avoid the exit's
15253 family along with the exit itself. Previously, the new guard
15254 selection logic avoided the exit, but did not consider its family.
15255 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15256 006 and CVE-2017-0377.
15258 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15259 - Don't block bootstrapping when a primary bridge is offline and we
15260 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15261 21969; bugfix on 0.3.0.3-alpha.
15263 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15264 - When starting with an old consensus, do not add new entry guards
15265 unless the consensus is "reasonably live" (under 1 day old). Fixes
15266 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15268 o Minor features (geoip):
15269 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15272 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15273 - Reject version numbers with non-numeric prefixes (such as +, -, or
15274 whitespace). Disallowing whitespace prevents differential version
15275 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15276 and part of 21508; bugfix on 0.0.8pre1.
15278 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15279 - Permit the fchmod system call, to avoid crashing on startup when
15280 starting with the seccomp2 sandbox and an unexpected set of
15281 permissions on the data directory or its contents. Fixes bug
15282 22516; bugfix on 0.2.5.4-alpha.
15284 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15285 - Fix a memset() off the end of an array when packing cells. This
15286 bug should be harmless in practice, since the corrupted bytes are
15287 still in the same structure, and are always padding bytes,
15288 ignored, or immediately overwritten, depending on compiler
15289 behavior. Nevertheless, because the memset()'s purpose is to make
15290 sure that any other cell-handling bugs can't expose bytes to the
15291 network, we need to fix it. Fixes bug 22737; bugfix on
15292 0.2.4.11-alpha. Fixes CID 1401591.
15295 Changes in version 0.3.1.3-alpha - 2017-06-08
15296 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15297 remotely crash a hidden service with an assertion failure. Anyone
15298 running a hidden service should upgrade to this version, or to some
15299 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15301 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15302 that sometimes made relays unreliable, as well as several other
15303 bugfixes described below.
15305 o Major bugfixes (hidden service, relay, security):
15306 - Fix a remotely triggerable assertion failure when a hidden service
15307 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15308 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15309 - Fix a remotely triggerable assertion failure caused by receiving a
15310 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15311 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15314 o Major bugfixes (relay, link handshake):
15315 - When performing the v3 link handshake on a TLS connection, report
15316 that we have the x509 certificate that we actually used on that
15317 connection, even if we have changed certificates since that
15318 connection was first opened. Previously, we would claim to have
15319 used our most recent x509 link certificate, which would sometimes
15320 make the link handshake fail. Fixes one case of bug 22460; bugfix
15323 o Major bugfixes (relays, key management):
15324 - Regenerate link and authentication certificates whenever the key
15325 that signs them changes; also, regenerate link certificates
15326 whenever the signed key changes. Previously, these processes were
15327 only weakly coupled, and we relays could (for minutes to hours)
15328 wind up with an inconsistent set of keys and certificates, which
15329 other relays would not accept. Fixes two cases of bug 22460;
15330 bugfix on 0.3.0.1-alpha.
15331 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15332 send the certificate that matches the x509 certificate that we
15333 used on the TLS connection. Previously, there was a race condition
15334 if the TLS context rotated after we began the TLS handshake but
15335 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15338 o Major bugfixes (torrc, crash):
15339 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15340 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15342 o Minor features (code style):
15343 - Add "Falls through" comments to our codebase, in order to silence
15344 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15345 Stieger. Closes ticket 22446.
15347 o Minor features (diagnostic):
15348 - Add logging messages to try to diagnose a rare bug that seems to
15349 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15350 think this is happening because of incorrect system clocks, but
15351 we'd like to know for certain. Diagnostic for bug 22466.
15353 o Minor bugfixes (correctness):
15354 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15355 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15357 o Minor bugfixes (directory protocol):
15358 - Check for libzstd >= 1.1, because older versions lack the
15359 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15361 o Minor bugfixes (link handshake):
15362 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15363 months, and regenerate it when it is within one month of expiring.
15364 Previously, we had generated this certificate at startup with a
15365 ten-year lifetime, but that could lead to weird behavior when Tor
15366 was started with a grossly inaccurate clock. Mitigates bug 22466;
15367 mitigation on 0.3.0.1-alpha.
15369 o Minor bugfixes (storage directories):
15370 - Always check for underflows in the cached storage directory usage.
15371 If the usage does underflow, re-calculate it. Also, avoid a
15372 separate underflow when the usage is not known. Fixes bug 22424;
15373 bugfix on 0.3.1.1-alpha.
15375 o Minor bugfixes (unit tests):
15376 - The unit tests now pass on systems where localhost is misconfigured
15377 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15381 - Clarify the manpage for the (deprecated) torify script. Closes
15384 Changes in version 0.3.0.8 - 2017-06-08
15385 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15386 remotely crash a hidden service with an assertion failure. Anyone
15387 running a hidden service should upgrade to this version, or to some
15388 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15390 Tor 0.3.0.8 also includes fixes for several key management bugs
15391 that sometimes made relays unreliable, as well as several other
15392 bugfixes described below.
15394 o Major bugfixes (hidden service, relay, security, backport
15395 from 0.3.1.3-alpha):
15396 - Fix a remotely triggerable assertion failure when a hidden service
15397 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15398 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15399 - Fix a remotely triggerable assertion failure caused by receiving a
15400 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15401 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15404 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15405 - When performing the v3 link handshake on a TLS connection, report
15406 that we have the x509 certificate that we actually used on that
15407 connection, even if we have changed certificates since that
15408 connection was first opened. Previously, we would claim to have
15409 used our most recent x509 link certificate, which would sometimes
15410 make the link handshake fail. Fixes one case of bug 22460; bugfix
15413 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15414 - Regenerate link and authentication certificates whenever the key
15415 that signs them changes; also, regenerate link certificates
15416 whenever the signed key changes. Previously, these processes were
15417 only weakly coupled, and we relays could (for minutes to hours)
15418 wind up with an inconsistent set of keys and certificates, which
15419 other relays would not accept. Fixes two cases of bug 22460;
15420 bugfix on 0.3.0.1-alpha.
15421 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15422 send the certificate that matches the x509 certificate that we
15423 used on the TLS connection. Previously, there was a race condition
15424 if the TLS context rotated after we began the TLS handshake but
15425 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15428 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15429 - Stop rejecting v3 hidden service descriptors because their size
15430 did not match an old padding rule. Fixes bug 22447; bugfix on
15433 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15434 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15435 December 2016 (of which ~126 were still functional) with a list of
15436 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15437 2017. Resolves ticket 21564.
15439 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15440 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15441 bug 22252; bugfix on 0.2.9.3-alpha.
15443 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15444 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15445 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15447 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
15448 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15449 months, and regenerate it when it is within one month of expiring.
15450 Previously, we had generated this certificate at startup with a
15451 ten-year lifetime, but that could lead to weird behavior when Tor
15452 was started with a grossly inaccurate clock. Mitigates bug 22466;
15453 mitigation on 0.3.0.1-alpha.
15455 o Minor bugfixes (memory leak, directory authority, backport from
15457 - When directory authorities reject a router descriptor due to
15458 keypinning, free the router descriptor rather than leaking the
15459 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15462 Changes in version 0.2.9.11 - 2017-06-08
15463 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
15464 remotely crash a hidden service with an assertion failure. Anyone
15465 running a hidden service should upgrade to this version, or to some
15466 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15467 are not affected by TROVE-2017-004.)
15469 Tor 0.2.9.11 also backports fixes for several key management bugs
15470 that sometimes made relays unreliable, as well as several other
15471 bugfixes described below.
15473 o Major bugfixes (hidden service, relay, security, backport
15474 from 0.3.1.3-alpha):
15475 - Fix a remotely triggerable assertion failure caused by receiving a
15476 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15477 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15480 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15481 - When performing the v3 link handshake on a TLS connection, report
15482 that we have the x509 certificate that we actually used on that
15483 connection, even if we have changed certificates since that
15484 connection was first opened. Previously, we would claim to have
15485 used our most recent x509 link certificate, which would sometimes
15486 make the link handshake fail. Fixes one case of bug 22460; bugfix
15489 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15490 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15491 December 2016 (of which ~126 were still functional) with a list of
15492 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15493 2017. Resolves ticket 21564.
15495 o Minor features (future-proofing, backport from 0.3.0.7):
15496 - Tor no longer refuses to download microdescriptors or descriptors if
15497 they are listed as "published in the future". This change will
15498 eventually allow us to stop listing meaningful "published" dates
15499 in microdescriptor consensuses, and thereby allow us to reduce the
15500 resources required to download consensus diffs by over 50%.
15501 Implements part of ticket 21642; implements part of proposal 275.
15503 o Minor features (directory authorities, backport from 0.3.0.4-rc)
15504 - Directory authorities now reject relays running versions
15505 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15506 suffer from bug 20499 and don't keep their consensus cache
15507 up-to-date. Resolves ticket 20509.
15509 o Minor features (geoip):
15510 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15513 o Minor bugfixes (control port, backport from 0.3.0.6):
15514 - The GETINFO extra-info/digest/<digest> command was broken because
15515 of a wrong base16 decode return value check, introduced when
15516 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15518 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15519 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15520 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15522 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
15523 - The getpid() system call is now permitted under the Linux seccomp2
15524 sandbox, to avoid crashing with versions of OpenSSL (and other
15525 libraries) that attempt to learn the process's PID by using the
15526 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15529 o Minor bugfixes (memory leak, directory authority, backport
15530 from 0.3.1.2-alpha):
15531 - When directory authorities reject a router descriptor due to
15532 keypinning, free the router descriptor rather than leaking the
15533 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15535 Changes in version 0.2.8.14 - 2017-06-08
15536 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15537 remotely crash a hidden service with an assertion failure. Anyone
15538 running a hidden service should upgrade to this version, or to some
15539 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15540 are not affected by TROVE-2017-004.)
15542 o Major bugfixes (hidden service, relay, security):
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 Minor features (geoip):
15549 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15552 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15553 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15554 December 2016 (of which ~126 were still functional) with a list of
15555 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15556 2017. Resolves ticket 21564.
15558 o Minor bugfixes (correctness):
15559 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15560 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15562 Changes in version 0.2.7.8 - 2017-06-08
15563 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15564 remotely crash a hidden service with an assertion failure. Anyone
15565 running a hidden service should upgrade to this version, or to some
15566 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15567 are not affected by TROVE-2017-004.)
15569 o Major bugfixes (hidden service, relay, security):
15570 - Fix a remotely triggerable assertion failure caused by receiving a
15571 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15572 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15575 o Minor features (geoip):
15576 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15579 o Minor bugfixes (correctness):
15580 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15581 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15584 Changes in version 0.2.6.12 - 2017-06-08
15585 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
15586 remotely crash a hidden service with an assertion failure. Anyone
15587 running a hidden service should upgrade to this version, or to some
15588 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15589 are not affected by TROVE-2017-004.)
15591 o Major bugfixes (hidden service, relay, security):
15592 - Fix a remotely triggerable assertion failure caused by receiving a
15593 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15594 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15597 o Minor features (geoip):
15598 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15601 o Minor bugfixes (correctness):
15602 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15603 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15605 Changes in version 0.2.5.14 - 2017-06-08
15606 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
15607 remotely crash a hidden service with an assertion failure. Anyone
15608 running a hidden service should upgrade to this version, or to some
15609 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15610 are not affected by TROVE-2017-004.)
15612 o Major bugfixes (hidden service, relay, security):
15613 - Fix a remotely triggerable assertion failure caused by receiving a
15614 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15615 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15618 o Minor features (geoip):
15619 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15622 o Minor bugfixes (correctness):
15623 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15624 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15626 Changes in version 0.2.4.29 - 2017-06-08
15627 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
15628 remotely crash a hidden service with an assertion failure. Anyone
15629 running a hidden service should upgrade to this version, or to some
15630 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15631 are not affected by TROVE-2017-004.)
15633 o Major bugfixes (hidden service, relay, security):
15634 - Fix a remotely triggerable assertion failure caused by receiving a
15635 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15636 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15639 o Minor features (geoip):
15640 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15643 o Minor bugfixes (correctness):
15644 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15645 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15648 Changes in version 0.3.1.2-alpha - 2017-05-26
15649 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
15650 fixes a few bugs found while testing 0.3.1.1-alpha, including a
15651 memory corruption bug that affected relay stability.
15653 o Major bugfixes (crash, relay):
15654 - Fix a memory-corruption bug in relays that set MyFamily.
15655 Previously, they would double-free MyFamily elements when making
15656 the next descriptor or when changing their configuration. Fixes
15657 bug 22368; bugfix on 0.3.1.1-alpha.
15659 o Minor bugfixes (logging):
15660 - Log a better message when a directory authority replies to an
15661 upload with an unexpected status code. Fixes bug 11121; bugfix
15664 o Minor bugfixes (memory leak, directory authority):
15665 - When directory authorities reject a router descriptor due to
15666 keypinning, free the router descriptor rather than leaking the
15667 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15670 Changes in version 0.3.1.1-alpha - 2017-05-22
15671 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
15672 reduces the bandwidth usage for Tor's directory protocol, adds some
15673 basic padding to resist netflow-based traffic analysis and to serve as
15674 the basis of other padding in the future, and adds rust support to the
15677 It also contains numerous other small features and improvements to
15678 security, correctness, and performance.
15680 Below are the changes since 0.3.0.7.
15682 o Major features (directory protocol):
15683 - Tor relays and authorities can now serve clients an abbreviated
15684 version of the consensus document, containing only the changes
15685 since an older consensus document that the client holds. Clients
15686 now request these documents when available. When both client and
15687 server use this new protocol, they will use far less bandwidth (up
15688 to 94% less) to keep the client's consensus up-to-date. Implements
15689 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
15690 - Tor can now compress directory traffic with lzma or with zstd
15691 compression algorithms, which can deliver better bandwidth
15692 performance. Because lzma is computationally expensive, it's only
15693 used for documents that can be compressed once and served many
15694 times. Support for these algorithms requires that tor is built
15695 with the libzstd and/or liblzma libraries available. Implements
15696 proposal 278; closes ticket 21662.
15697 - Relays now perform the more expensive compression operations, and
15698 consensus diff generation, in worker threads. This separation
15699 avoids delaying the main thread when a new consensus arrives.
15701 o Major features (experimental):
15702 - Tor can now build modules written in Rust. To turn this on, pass
15703 the "--enable-rust" flag to the configure script. It's not time to
15704 get excited yet: currently, there is no actual Rust functionality
15705 beyond some simple glue code, and a notice at startup to tell you
15706 that Rust is running. Still, we hope that programmers and
15707 packagers will try building Tor with Rust support, so that we can
15708 find issues and solve portability problems. Closes ticket 22106.
15710 o Major features (traffic analysis resistance):
15711 - Connections between clients and relays now send a padding cell in
15712 each direction every 1.5 to 9.5 seconds (tunable via consensus
15713 parameters). This padding will not resist specialized
15714 eavesdroppers, but it should be enough to make many ISPs' routine
15715 network flow logging less useful in traffic analysis against
15718 Padding is negotiated using Tor's link protocol, so both relays
15719 and clients must upgrade for this to take effect. Clients may
15720 still send padding despite the relay's version by setting
15721 ConnectionPadding 1 in torrc, and may disable padding by setting
15722 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
15723 users with the torrc option ReducedConnectionPadding. Implements
15724 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
15725 - Relays will publish 24 hour totals of padding and non-padding cell
15726 counts to their extra-info descriptors, unless PaddingStatistics 0
15727 is set in torrc. These 24 hour totals are also rounded to
15728 multiples of 10000.
15730 o Major bugfixes (connection usage):
15731 - We use NETINFO cells to try to determine if both relays involved
15732 in a connection will agree on the canonical status of that
15733 connection. We prefer the connections where this is the case for
15734 extend cells, and try to close connections where relays disagree
15735 on their canonical status early. Also, we now prefer the oldest
15736 valid connection for extend cells. These two changes should reduce
15737 the number of long-term connections that are kept open between
15738 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
15739 - Relays now log hourly statistics (look for
15740 "channel_check_for_duplicates" lines) on the total number of
15741 connections to other relays. If the number of connections per
15742 relay is unexpectedly large, this log message is at notice level.
15743 Otherwise it is at info.
15745 o Major bugfixes (entry guards):
15746 - Don't block bootstrapping when a primary bridge is offline and we
15747 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15748 21969; bugfix on 0.3.0.3-alpha.
15750 o Major bugfixes (linux TPROXY support):
15751 - Fix a typo that had prevented TPROXY-based transparent proxying
15752 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15753 Patch from "d4fq0fQAgoJ".
15755 o Minor features (security, windows):
15756 - Enable a couple of pieces of Windows hardening: one
15757 (HeapEnableTerminationOnCorruption) that has been on-by-default
15758 since Windows 8, and unavailable before Windows 7; and one
15759 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
15760 affect us, but shouldn't do any harm. Closes ticket 21953.
15762 o Minor features (config options):
15763 - Allow "%include" directives in torrc configuration files. These
15764 directives import the settings from other files, or from all the
15765 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
15766 - Make SAVECONF return an error when overwriting a torrc that has
15767 includes. Using SAVECONF with the FORCE option will allow it to
15768 overwrite torrc even if includes are used. Related to ticket 1922.
15769 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
15770 will work without the FORCE option. Related to ticket 1922.
15772 o Minor features (controller):
15773 - Warn the first time that a controller requests data in the long-
15774 deprecated 'GETINFO network-status' format. Closes ticket 21703.
15776 o Minor features (defaults):
15777 - The default value for UseCreateFast is now 0: clients which
15778 haven't yet received a consensus document will now use a proper
15779 ntor handshake to talk to their directory servers whenever they
15780 can. Closes ticket 21407.
15781 - Onion key rotation and expiry intervals are now defined as a
15782 network consensus parameter, per proposal 274. The default
15783 lifetime of an onion key is increased from 7 to 28 days. Old onion
15784 keys will expire after 7 days by default. This change will make
15785 consensus diffs much smaller, and save significant bandwidth.
15786 Closes ticket 21641.
15788 o Minor features (fallback directory list):
15789 - Update the fallback directory mirror whitelist and blacklist based
15790 on operator emails. Closes task 21121.
15791 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15792 December 2016 (of which ~126 were still functional) with a list of
15793 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15794 2017. Resolves ticket 21564.
15796 o Minor features (hidden services, logging):
15797 - Log a message when a hidden service descriptor has fewer
15798 introduction points than specified in
15799 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
15800 - Log a message when a hidden service reaches its introduction point
15801 circuit limit, and when that limit is reset. Follow up to ticket
15802 21594; closes ticket 21622.
15803 - Warn user if multiple entries in EntryNodes and at least one
15804 HiddenService are used together. Pinning EntryNodes along with a
15805 hidden service can be possibly harmful; for instance see ticket
15806 14917 or 21155. Closes ticket 21155.
15808 o Minor features (linux seccomp2 sandbox):
15809 - We now have a document storage backend compatible with the Linux
15810 seccomp2 sandbox. This backend is used for consensus documents and
15811 diffs between them; in the long term, we'd like to use it for
15812 unparseable directory material too. Closes ticket 21645
15813 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
15814 from 1MB to 16MB. This was necessary with the glibc allocator in
15815 order to allow worker threads to allocate more memory -- which in
15816 turn is necessary because of our new use of worker threads for
15817 compression. Closes ticket 22096.
15819 o Minor features (logging):
15820 - Log files are no longer created world-readable by default.
15821 (Previously, most distributors would store the logs in a non-
15822 world-readable location to prevent inappropriate access. This
15823 change is an extra precaution.) Closes ticket 21729; patch
15826 o Minor features (performance):
15827 - Our Keccak (SHA-3) implementation now accesses memory more
15828 efficiently, especially on little-endian systems. Closes
15830 - Add an O(1) implementation of channel_find_by_global_id(), to
15831 speed some controller functions.
15833 o Minor features (relay, configuration):
15834 - The MyFamily option may now be repeated as many times as desired,
15835 for relays that want to configure large families. Closes ticket
15836 4998; patch by Daniel Pinto.
15838 o Minor features (safety):
15839 - Add an explicit check to extrainfo_parse_entry_from_string() for
15840 NULL inputs. We don't believe this can actually happen, but it may
15841 help silence a warning from the Clang analyzer. Closes
15844 o Minor features (testing):
15845 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
15846 When Tor is compiled with this option, we disable a number of
15847 redundant memory-safety failsafes that are intended to stop bugs
15848 from becoming security issues. This makes it easier to hunt for
15849 bugs that would be security issues without the failsafes turned
15850 on. Closes ticket 21439.
15851 - Add a general event-tracing instrumentation support to Tor. This
15852 subsystem will enable developers and researchers to add fine-
15853 grained instrumentation to their Tor instances, for use when
15854 examining Tor network performance issues. There are no trace
15855 events yet, and event-tracing is off by default unless enabled at
15856 compile time. Implements ticket 13802.
15857 - Improve our version parsing tests: add tests for typical version
15858 components, add tests for invalid versions, including numeric
15859 range and non-numeric prefixes. Unit tests 21278, 21450, and
15860 21507. Partially implements 21470.
15862 o Minor bugfixes (bandwidth accounting):
15863 - Roll over monthly accounting at the configured hour and minute,
15864 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15865 Found by Andrey Karpov with PVS-Studio.
15867 o Minor bugfixes (code correctness):
15868 - Accurately identify client connections by their lack of peer
15869 authentication. This means that we bail out earlier if asked to
15870 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
15873 o Minor bugfixes (configuration):
15874 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15875 bug 22252; bugfix on 0.2.9.3-alpha.
15877 o Minor bugfixes (connection lifespan):
15878 - Allow more control over how long TLS connections are kept open:
15879 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
15880 single option called CircuitsAvailableTimeout. Also, allow the
15881 consensus to control the default values for both this preference
15882 and the lifespan of relay-to-relay connections. Fixes bug 17592;
15883 bugfix on 0.2.5.5-alpha.
15884 - Increase the initial circuit build timeout testing frequency, to
15885 help ensure that ReducedConnectionPadding clients finish learning
15886 a timeout before their orconn would expire. The initial testing
15887 rate was set back in the days of TAP and before the Tor Browser
15888 updater, when we had to be much more careful about new clients
15889 making lots of circuits. With this change, a circuit build timeout
15890 is learned in about 15-20 minutes, instead of 100-120 minutes.
15892 o Minor bugfixes (controller):
15893 - GETINFO onions/current and onions/detached no longer respond with
15894 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
15895 - Trigger HS descriptor events on the control port when the client
15896 fails to pick a hidden service directory for a hidden service.
15897 This can happen if all the hidden service directories are in
15898 ExcludeNodes, or they have all been queried within the last 15
15899 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
15901 o Minor bugfixes (directory authority):
15902 - When rejecting a router descriptor for running an obsolete version
15903 of Tor without ntor support, warn about the obsolete tor version,
15904 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15905 - Prevent the shared randomness subsystem from asserting when
15906 initialized by a bridge authority with an incomplete configuration
15907 file. Fixes bug 21586; bugfix on 0.2.9.8.
15909 o Minor bugfixes (exit-side DNS):
15910 - Fix an untriggerable assertion that checked the output of a
15911 libevent DNS error, so that the assertion actually behaves as
15912 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
15913 Karpov using PVS-Studio.
15915 o Minor bugfixes (fallback directories):
15916 - Make the usage example in updateFallbackDirs.py actually work, and
15917 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
15918 - Decrease the guard flag average required to be a fallback. This
15919 allows us to keep relays that have their guard flag removed when
15920 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15921 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
15922 bugfix on 0.2.8.1-alpha.
15923 - Make sure fallback directory mirrors have the same address, port,
15924 and relay identity key for at least 30 days before they are
15925 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15927 o Minor bugfixes (hidden services):
15928 - Stop printing a cryptic warning when a hidden service gets a
15929 request to connect to a virtual port that it hasn't configured.
15930 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
15931 - Simplify hidden service descriptor creation by using an existing
15932 flag to check if an introduction point is established. Fixes bug
15933 21599; bugfix on 0.2.7.2-alpha.
15935 o Minor bugfixes (memory leak):
15936 - Fix a small memory leak at exit from the backtrace handler code.
15937 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
15939 o Minor bugfixes (protocol, logging):
15940 - Downgrade a log statement about unexpected relay cells from "bug"
15941 to "protocol warning", because there is at least one use case
15942 where it can be triggered by a buggy tor implementation. Fixes bug
15943 21293; bugfix on 0.1.1.14-alpha.
15945 o Minor bugfixes (testing):
15946 - Use unbuffered I/O for utility functions around the
15947 process_handle_t type. This fixes unit test failures reported on
15948 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
15949 - Make display of captured unit test log messages consistent. Fixes
15950 bug 21510; bugfix on 0.2.9.3-alpha.
15951 - Make test-network.sh always call chutney's test-network.sh.
15952 Previously, this only worked on systems which had bash installed,
15953 due to some bash-specific code in the script. Fixes bug 19699;
15954 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
15956 o Minor bugfixes (voting consistency):
15957 - Reject version numbers with non-numeric prefixes (such as +, -, or
15958 whitespace). Disallowing whitespace prevents differential version
15959 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15960 and part of 21508; bugfix on 0.0.8pre1.
15962 o Minor bugfixes (windows, relay):
15963 - Resolve "Failure from drain_fd: No error" warnings on Windows
15964 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
15966 o Code simplification and refactoring:
15967 - Break up the 630-line function connection_dir_client_reached_eof()
15968 into a dozen smaller functions. This change should help
15969 maintainability and readability of the client directory code.
15970 - Isolate our use of the openssl headers so that they are only
15971 included from our crypto wrapper modules, and from tests that
15972 examine those modules' internals. Closes ticket 21841.
15973 - Simplify our API to launch directory requests, making it more
15974 extensible and less error-prone. Now it's easier to add extra
15975 headers to directory requests. Closes ticket 21646.
15976 - Our base64 decoding functions no longer overestimate the output
15977 space that they need when parsing unpadded inputs. Closes
15979 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
15980 Resolves ticket 22213.
15981 - The logic that directory caches use to spool request to clients,
15982 serving them one part at a time so as not to allocate too much
15983 memory, has been refactored for consistency. Previously there was
15984 a separate spooling implementation per type of spoolable data. Now
15985 there is one common spooling implementation, with extensible data
15986 types. Closes ticket 21651.
15987 - Tor's compression module now supports multiple backends. Part of
15988 the implementation for proposal 278; closes ticket 21663.
15991 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
15992 Closes ticket 21873.
15993 - Correct documentation about the default DataDirectory value.
15994 Closes ticket 21151.
15995 - Document the default behavior of NumEntryGuards and
15996 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
15998 - Document key=value pluggable transport arguments for Bridge lines
15999 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
16000 - Note that bandwidth-limiting options don't affect TCP headers or
16001 DNS. Closes ticket 17170.
16003 o Removed features (configuration options, all in ticket 22060):
16004 - These configuration options are now marked Obsolete, and no longer
16005 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
16006 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
16007 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
16008 in 0.2.9.2-alpha and have now been removed. The previous default
16009 behavior is now always chosen; the previous (less secure) non-
16010 default behavior is now unavailable.
16011 - CloseHSClientCircuitsImmediatelyOnTimeout and
16012 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
16013 0.2.9.2-alpha and now have been removed. HS circuits never close
16014 on circuit build timeout; they have a longer timeout period.
16015 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
16016 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
16017 (and others) to configure listen-only and advertise-only addresses.
16019 o Removed features (tools):
16020 - We've removed the tor-checkkey tool from src/tools. Long ago, we
16021 used it to help people detect RSA keys that were generated by
16022 versions of Debian affected by CVE-2008-0166. But those keys have
16023 been out of circulation for ages, and this tool is no longer
16024 required. Closes ticket 21842.
16027 Changes in version 0.3.0.7 - 2017-05-15
16028 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
16029 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
16030 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
16031 clients are not affected.
16033 o Major bugfixes (hidden service directory, security):
16034 - Fix an assertion failure in the hidden service directory code, which
16035 could be used by an attacker to remotely cause a Tor relay process to
16036 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
16037 should upgrade. This security issue is tracked as TROVE-2017-002.
16038 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
16041 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
16044 o Minor features (future-proofing):
16045 - Tor no longer refuses to download microdescriptors or descriptors
16046 if they are listed as "published in the future". This change will
16047 eventually allow us to stop listing meaningful "published" dates
16048 in microdescriptor consensuses, and thereby allow us to reduce the
16049 resources required to download consensus diffs by over 50%.
16050 Implements part of ticket 21642; implements part of proposal 275.
16052 o Minor bugfixes (Linux seccomp2 sandbox):
16053 - The getpid() system call is now permitted under the Linux seccomp2
16054 sandbox, to avoid crashing with versions of OpenSSL (and other
16055 libraries) that attempt to learn the process's PID by using the
16056 syscall rather than the VDSO code. Fixes bug 21943; bugfix
16060 Changes in version 0.3.0.6 - 2017-04-26
16061 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
16063 With the 0.3.0 series, clients and relays now use Ed25519 keys to
16064 authenticate their link connections to relays, rather than the old
16065 RSA1024 keys that they used before. (Circuit crypto has been
16066 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
16067 the guard selection and replacement algorithm to behave more robustly
16068 in the presence of unreliable networks, and to resist guard-
16071 This series also includes numerous other small features and bugfixes,
16072 along with more groundwork for the upcoming hidden-services revamp.
16074 Per our stable release policy, we plan to support the Tor 0.3.0
16075 release series for at least the next nine months, or for three months
16076 after the first stable release of the 0.3.1 series: whichever is
16077 longer. If you need a release with long-term support, we recommend
16078 that you stay with the 0.2.9 series.
16080 Below are the changes since 0.3.0.5-rc. For a list of all changes
16081 since 0.2.9, see the ReleaseNotes file.
16083 o Minor features (geoip):
16084 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
16087 o Minor bugfixes (control port):
16088 - The GETINFO extra-info/digest/<digest> command was broken because
16089 of a wrong base16 decode return value check, introduced when
16090 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
16092 o Minor bugfixes (crash prevention):
16093 - Fix a (currently untriggerable, but potentially dangerous) crash
16094 bug when base32-encoding inputs whose sizes are not a multiple of
16095 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
16098 Changes in version 0.3.0.5-rc - 2017-04-05
16099 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
16100 0.3.0 release series.
16102 This is the second release candidate in the Tor 0.3.0 series, and has
16103 much fewer changes than the first. If we find no new bugs or
16104 regressions here, the first stable 0.3.0 release will be nearly
16107 o Major bugfixes (crash, directory connections):
16108 - Fix a rare crash when sending a begin cell on a circuit whose
16109 linked directory connection had already been closed. Fixes bug
16110 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
16112 o Major bugfixes (guard selection):
16113 - Fix a guard selection bug where Tor would refuse to bootstrap in
16114 some cases if the user swapped a bridge for another bridge in
16115 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
16116 Reported by "torvlnt33r".
16118 o Minor features (geoip):
16119 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
16122 o Minor bugfix (compilation):
16123 - Fix a warning when compiling hs_service.c. Previously, it had no
16124 exported symbols when compiled for libor.a, resulting in a
16125 compilation warning from clang. Fixes bug 21825; bugfix
16128 o Minor bugfixes (hidden services):
16129 - Make hidden services check for failed intro point connections,
16130 even when they have exceeded their intro point creation limit.
16131 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
16132 - Make hidden services with 8 to 10 introduction points check for
16133 failed circuits immediately after startup. Previously, they would
16134 wait for 5 minutes before performing their first checks. Fixes bug
16135 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
16137 o Minor bugfixes (memory leaks):
16138 - Fix a memory leak when using GETCONF on a port option. Fixes bug
16139 21682; bugfix on 0.3.0.3-alpha.
16141 o Minor bugfixes (relay):
16142 - Avoid a double-marked-circuit warning that could happen when we
16143 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
16146 o Minor bugfixes (tests):
16147 - Run the entry_guard_parse_from_state_full() test with the time set
16148 to a specific date. (The guard state that this test was parsing
16149 contained guards that had expired since the test was first
16150 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
16153 - Update the description of the directory server options in the
16154 manual page, to clarify that a relay no longer needs to set
16155 DirPort in order to be a directory cache. Closes ticket 21720.
16159 Changes in version 0.2.8.13 - 2017-03-03
16160 Tor 0.2.8.13 backports a security fix from later Tor
16161 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
16162 this release, if for some reason they cannot upgrade to a later
16163 release series, and if they build Tor with the --enable-expensive-hardening
16166 Note that support for Tor 0.2.8.x is ending next year: we will not issue
16167 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
16168 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16170 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16171 - Fix an integer underflow bug when comparing malformed Tor
16172 versions. This bug could crash Tor when built with
16173 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16174 0.2.9.8, which were built with -ftrapv by default. In other cases
16175 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16176 on 0.0.8pre1. Found by OSS-Fuzz.
16178 o Minor features (geoip):
16179 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16183 Changes in version 0.2.7.7 - 2017-03-03
16184 Tor 0.2.7.7 backports a number of security fixes from later Tor
16185 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
16186 this release, if for some reason they cannot upgrade to a later
16189 Note that support for Tor 0.2.7.x is ending this year: we will not issue
16190 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
16191 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16193 o Directory authority changes (backport from 0.2.8.5-rc):
16194 - Urras is no longer a directory authority. Closes ticket 19271.
16196 o Directory authority changes (backport from 0.2.9.2-alpha):
16197 - The "Tonga" bridge authority has been retired; the new bridge
16198 authority is "Bifroest". Closes tickets 19728 and 19690.
16200 o Directory authority key updates (backport from 0.2.8.1-alpha):
16201 - Update the V3 identity key for the dannenberg directory authority:
16202 it was changed on 18 November 2015. Closes task 17906. Patch
16205 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16206 - Fix a bug in parsing that could cause clients to read a single
16207 byte past the end of an allocated region. This bug could be used
16208 to cause hardened clients (built with --enable-expensive-hardening)
16209 to crash if they tried to visit a hostile hidden service. Non-
16210 hardened clients are only affected depending on the details of
16211 their platform's memory allocator. Fixes bug 21018; bugfix on
16212 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16213 2016-12-002 and as CVE-2016-1254.
16215 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16216 - Stop a crash that could occur when a client running with DNSPort
16217 received a query with multiple address types, and the first
16218 address type was not supported. Found and fixed by Scott Dial.
16219 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16220 - Prevent a class of security bugs caused by treating the contents
16221 of a buffer chunk as if they were a NUL-terminated string. At
16222 least one such bug seems to be present in all currently used
16223 versions of Tor, and would allow an attacker to remotely crash
16224 most Tor instances, especially those compiled with extra compiler
16225 hardening. With this defense in place, such bugs can't crash Tor,
16226 though we should still fix them as they occur. Closes ticket
16227 20384 (TROVE-2016-10-001).
16229 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16230 - Avoid a difficult-to-trigger heap corruption attack when extending
16231 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16232 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16233 Reported by Guido Vranken.
16235 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16236 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16237 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16239 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16240 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16241 pointer to the previous (uninitialized) key value. The impact here
16242 should be limited to a difficult-to-trigger crash, if OpenSSL is
16243 running an engine that makes key generation failures possible, or
16244 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16245 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16248 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16249 - Fix an integer underflow bug when comparing malformed Tor
16250 versions. This bug could crash Tor when built with
16251 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16252 0.2.9.8, which were built with -ftrapv by default. In other cases
16253 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16254 on 0.0.8pre1. Found by OSS-Fuzz.
16256 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16257 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16258 zero size. Check size argument to memwipe() for underflow. Fixes
16259 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16262 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16263 - Make Tor survive errors involving connections without a
16264 corresponding event object. Previously we'd fail with an
16265 assertion; now we produce a log message. Related to bug 16248.
16267 o Minor features (geoip):
16268 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16272 Changes in version 0.2.6.11 - 2017-03-03
16273 Tor 0.2.6.11 backports a number of security fixes from later Tor
16274 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16275 this release, if for some reason they cannot upgrade to a later
16278 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16279 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16280 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16282 o Directory authority changes (backport from 0.2.8.5-rc):
16283 - Urras is no longer a directory authority. Closes ticket 19271.
16285 o Directory authority changes (backport from 0.2.9.2-alpha):
16286 - The "Tonga" bridge authority has been retired; the new bridge
16287 authority is "Bifroest". Closes tickets 19728 and 19690.
16289 o Directory authority key updates (backport from 0.2.8.1-alpha):
16290 - Update the V3 identity key for the dannenberg directory authority:
16291 it was changed on 18 November 2015. Closes task 17906. Patch
16294 o Major features (security fixes, backport from 0.2.9.4-alpha):
16295 - Prevent a class of security bugs caused by treating the contents
16296 of a buffer chunk as if they were a NUL-terminated string. At
16297 least one such bug seems to be present in all currently used
16298 versions of Tor, and would allow an attacker to remotely crash
16299 most Tor instances, especially those compiled with extra compiler
16300 hardening. With this defense in place, such bugs can't crash Tor,
16301 though we should still fix them as they occur. Closes ticket
16302 20384 (TROVE-2016-10-001).
16304 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16305 - Fix a bug in parsing that could cause clients to read a single
16306 byte past the end of an allocated region. This bug could be used
16307 to cause hardened clients (built with --enable-expensive-hardening)
16308 to crash if they tried to visit a hostile hidden service. Non-
16309 hardened clients are only affected depending on the details of
16310 their platform's memory allocator. Fixes bug 21018; bugfix on
16311 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16312 2016-12-002 and as CVE-2016-1254.
16314 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16315 - Stop a crash that could occur when a client running with DNSPort
16316 received a query with multiple address types, and the first
16317 address type was not supported. Found and fixed by Scott Dial.
16318 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16320 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16321 - Fix an error that could cause us to read 4 bytes before the
16322 beginning of an openssl string. This bug could be used to cause
16323 Tor to crash on systems with unusual malloc implementations, or
16324 systems with unusual hardening installed. Fixes bug 17404; bugfix
16327 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16328 - Avoid a difficult-to-trigger heap corruption attack when extending
16329 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16330 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16331 Reported by Guido Vranken.
16333 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16334 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16335 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16337 o Major bugfixes (guard selection, backport from 0.2.7.6):
16338 - Actually look at the Guard flag when selecting a new directory
16339 guard. When we implemented the directory guard design, we
16340 accidentally started treating all relays as if they have the Guard
16341 flag during guard selection, leading to weaker anonymity and worse
16342 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16345 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16346 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16347 pointer to the previous (uninitialized) key value. The impact here
16348 should be limited to a difficult-to-trigger crash, if OpenSSL is
16349 running an engine that makes key generation failures possible, or
16350 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16351 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16354 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16355 - Fix an integer underflow bug when comparing malformed Tor
16356 versions. This bug could crash Tor when built with
16357 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16358 0.2.9.8, which were built with -ftrapv by default. In other cases
16359 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16360 on 0.0.8pre1. Found by OSS-Fuzz.
16362 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16363 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16364 zero size. Check size argument to memwipe() for underflow. Fixes
16365 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16368 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16369 - Make Tor survive errors involving connections without a
16370 corresponding event object. Previously we'd fail with an
16371 assertion; now we produce a log message. Related to bug 16248.
16373 o Minor features (geoip):
16374 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16377 o Minor bugfixes (compilation, backport from 0.2.7.6):
16378 - Fix a compilation warning with Clang 3.6: Do not check the
16379 presence of an address which can never be NULL. Fixes bug 17781.
16382 Changes in version 0.2.5.13 - 2017-03-03
16383 Tor 0.2.5.13 backports a number of security fixes from later Tor
16384 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16385 this release, if for some reason they cannot upgrade to a later
16388 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16389 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16390 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16392 o Directory authority changes (backport from 0.2.8.5-rc):
16393 - Urras is no longer a directory authority. Closes ticket 19271.
16395 o Directory authority changes (backport from 0.2.9.2-alpha):
16396 - The "Tonga" bridge authority has been retired; the new bridge
16397 authority is "Bifroest". Closes tickets 19728 and 19690.
16399 o Directory authority key updates (backport from 0.2.8.1-alpha):
16400 - Update the V3 identity key for the dannenberg directory authority:
16401 it was changed on 18 November 2015. Closes task 17906. Patch
16404 o Major features (security fixes, backport from 0.2.9.4-alpha):
16405 - Prevent a class of security bugs caused by treating the contents
16406 of a buffer chunk as if they were a NUL-terminated string. At
16407 least one such bug seems to be present in all currently used
16408 versions of Tor, and would allow an attacker to remotely crash
16409 most Tor instances, especially those compiled with extra compiler
16410 hardening. With this defense in place, such bugs can't crash Tor,
16411 though we should still fix them as they occur. Closes ticket
16412 20384 (TROVE-2016-10-001).
16414 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16415 - Fix a bug in parsing that could cause clients to read a single
16416 byte past the end of an allocated region. This bug could be used
16417 to cause hardened clients (built with --enable-expensive-hardening)
16418 to crash if they tried to visit a hostile hidden service. Non-
16419 hardened clients are only affected depending on the details of
16420 their platform's memory allocator. Fixes bug 21018; bugfix on
16421 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16422 2016-12-002 and as CVE-2016-1254.
16424 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16425 - Stop a crash that could occur when a client running with DNSPort
16426 received a query with multiple address types, and the first
16427 address type was not supported. Found and fixed by Scott Dial.
16428 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16430 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16431 - Fix an error that could cause us to read 4 bytes before the
16432 beginning of an openssl string. This bug could be used to cause
16433 Tor to crash on systems with unusual malloc implementations, or
16434 systems with unusual hardening installed. Fixes bug 17404; bugfix
16437 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16438 - Avoid a difficult-to-trigger heap corruption attack when extending
16439 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16440 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16441 Reported by Guido Vranken.
16443 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16444 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16445 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16447 o Major bugfixes (guard selection, backport from 0.2.7.6):
16448 - Actually look at the Guard flag when selecting a new directory
16449 guard. When we implemented the directory guard design, we
16450 accidentally started treating all relays as if they have the Guard
16451 flag during guard selection, leading to weaker anonymity and worse
16452 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16455 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16456 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16457 pointer to the previous (uninitialized) key value. The impact here
16458 should be limited to a difficult-to-trigger crash, if OpenSSL is
16459 running an engine that makes key generation failures possible, or
16460 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16461 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16464 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16465 - Fix an integer underflow bug when comparing malformed Tor
16466 versions. This bug could crash Tor when built with
16467 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16468 0.2.9.8, which were built with -ftrapv by default. In other cases
16469 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16470 on 0.0.8pre1. Found by OSS-Fuzz.
16472 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16473 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16474 zero size. Check size argument to memwipe() for underflow. Fixes
16475 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16478 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16479 - Make Tor survive errors involving connections without a
16480 corresponding event object. Previously we'd fail with an
16481 assertion; now we produce a log message. Related to bug 16248.
16483 o Minor features (geoip):
16484 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16487 o Minor bugfixes (compilation, backport from 0.2.7.6):
16488 - Fix a compilation warning with Clang 3.6: Do not check the
16489 presence of an address which can never be NULL. Fixes bug 17781.
16491 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
16492 - Check for failures from crypto_early_init, and refuse to continue.
16493 A previous typo meant that we could keep going with an
16494 uninitialized crypto library, and would have OpenSSL initialize
16495 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
16496 when implementing ticket 4900. Patch by "teor".
16498 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16499 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16500 a client authorized hidden service. Fixes bug 15823; bugfix
16504 Changes in version 0.2.4.28 - 2017-03-03
16505 Tor 0.2.4.28 backports a number of security fixes from later Tor
16506 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
16507 this release, if for some reason they cannot upgrade to a later
16510 Note that support for Tor 0.2.4.x is ending soon: we will not issue
16511 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
16512 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
16514 o Directory authority changes (backport from 0.2.8.5-rc):
16515 - Urras is no longer a directory authority. Closes ticket 19271.
16517 o Directory authority changes (backport from 0.2.9.2-alpha):
16518 - The "Tonga" bridge authority has been retired; the new bridge
16519 authority is "Bifroest". Closes tickets 19728 and 19690.
16521 o Directory authority key updates (backport from 0.2.8.1-alpha):
16522 - Update the V3 identity key for the dannenberg directory authority:
16523 it was changed on 18 November 2015. Closes task 17906. Patch
16526 o Major features (security fixes, backport from 0.2.9.4-alpha):
16527 - Prevent a class of security bugs caused by treating the contents
16528 of a buffer chunk as if they were a NUL-terminated string. At
16529 least one such bug seems to be present in all currently used
16530 versions of Tor, and would allow an attacker to remotely crash
16531 most Tor instances, especially those compiled with extra compiler
16532 hardening. With this defense in place, such bugs can't crash Tor,
16533 though we should still fix them as they occur. Closes ticket
16534 20384 (TROVE-2016-10-001).
16536 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16537 - Fix a bug in parsing that could cause clients to read a single
16538 byte past the end of an allocated region. This bug could be used
16539 to cause hardened clients (built with --enable-expensive-hardening)
16540 to crash if they tried to visit a hostile hidden service. Non-
16541 hardened clients are only affected depending on the details of
16542 their platform's memory allocator. Fixes bug 21018; bugfix on
16543 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16544 2016-12-002 and as CVE-2016-1254.
16546 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16547 - Fix an error that could cause us to read 4 bytes before the
16548 beginning of an openssl string. This bug could be used to cause
16549 Tor to crash on systems with unusual malloc implementations, or
16550 systems with unusual hardening installed. Fixes bug 17404; bugfix
16553 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16554 - Avoid a difficult-to-trigger heap corruption attack when extending
16555 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16556 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16557 Reported by Guido Vranken.
16559 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16560 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16561 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16563 o Major bugfixes (guard selection, backport from 0.2.7.6):
16564 - Actually look at the Guard flag when selecting a new directory
16565 guard. When we implemented the directory guard design, we
16566 accidentally started treating all relays as if they have the Guard
16567 flag during guard selection, leading to weaker anonymity and worse
16568 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16571 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16572 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16573 pointer to the previous (uninitialized) key value. The impact here
16574 should be limited to a difficult-to-trigger crash, if OpenSSL is
16575 running an engine that makes key generation failures possible, or
16576 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16577 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16580 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16581 - Fix an integer underflow bug when comparing malformed Tor
16582 versions. This bug could crash Tor when built with
16583 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16584 0.2.9.8, which were built with -ftrapv by default. In other cases
16585 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16586 on 0.0.8pre1. Found by OSS-Fuzz.
16588 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16589 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16590 zero size. Check size argument to memwipe() for underflow. Fixes
16591 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16594 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16595 - Make Tor survive errors involving connections without a
16596 corresponding event object. Previously we'd fail with an
16597 assertion; now we produce a log message. Related to bug 16248.
16599 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
16600 - Make it harder for attackers to overload hidden services with
16601 introductions, by blocking multiple introduction requests on the
16602 same circuit. Resolves ticket 15515.
16604 o Minor features (geoip):
16605 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16608 o Minor bugfixes (compilation, backport from 0.2.7.6):
16609 - Fix a compilation warning with Clang 3.6: Do not check the
16610 presence of an address which can never be NULL. Fixes bug 17781.
16612 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16613 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16614 a client authorized hidden service. Fixes bug 15823; bugfix
16618 Changes in version 0.3.0.4-rc - 2017-03-01
16619 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
16620 0.3.0 release series, and introduces a few reliability features to
16621 keep them from coming back.
16623 This is the first release candidate in the Tor 0.3.0 series. If we
16624 find no new bugs or regressions here, the first stable 0.3.0 release
16625 will be nearly identical to it.
16627 o Major bugfixes (bridges):
16628 - When the same bridge is configured multiple times with the same
16629 identity, but at different address:port combinations, treat those
16630 bridge instances as separate guards. This fix restores the ability
16631 of clients to configure the same bridge with multiple pluggable
16632 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
16634 o Major bugfixes (hidden service directory v3):
16635 - Stop crashing on a failed v3 hidden service descriptor lookup
16636 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
16638 o Major bugfixes (parsing):
16639 - When parsing a malformed content-length field from an HTTP
16640 message, do not read off the end of the buffer. This bug was a
16641 potential remote denial-of-service attack against Tor clients and
16642 relays. A workaround was released in October 2016, to prevent this
16643 bug from crashing Tor. This is a fix for the underlying issue,
16644 which should no longer matter (if you applied the earlier patch).
16645 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
16646 using AFL (http://lcamtuf.coredump.cx/afl/).
16647 - Fix an integer underflow bug when comparing malformed Tor
16648 versions. This bug could crash Tor when built with
16649 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16650 0.2.9.8, which were built with -ftrapv by default. In other cases
16651 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16652 on 0.0.8pre1. Found by OSS-Fuzz.
16654 o Minor feature (protocol versioning):
16655 - Add new protocol version for proposal 224. HSIntro now advertises
16656 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
16658 o Minor features (directory authorities):
16659 - Directory authorities now reject descriptors that claim to be
16660 malformed versions of Tor. Helps prevent exploitation of
16662 - Reject version numbers with components that exceed INT32_MAX.
16663 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16664 Fixes bug 21450; bugfix on 0.0.8pre1.
16665 - Directory authorities now reject relays running versions
16666 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16667 suffer from bug 20499 and don't keep their consensus cache
16668 up-to-date. Resolves ticket 20509.
16670 o Minor features (geoip):
16671 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16674 o Minor features (reliability, crash):
16675 - Try better to detect problems in buffers where they might grow (or
16676 think they have grown) over 2 GB in size. Diagnostic for
16679 o Minor features (testing):
16680 - During 'make test-network-all', if tor logs any warnings, ask
16681 chutney to output them. Requires a recent version of chutney with
16682 the 21572 patch. Implements 21570.
16684 o Minor bugfixes (certificate expiration time):
16685 - Avoid using link certificates that don't become valid till some
16686 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
16688 o Minor bugfixes (code correctness):
16689 - Repair a couple of (unreachable or harmless) cases of the risky
16690 comparison-by-subtraction pattern that caused bug 21278.
16691 - Remove a redundant check for the UseEntryGuards option from the
16692 options_transition_affects_guards() function. Fixes bug 21492;
16693 bugfix on 0.3.0.1-alpha.
16695 o Minor bugfixes (directory mirrors):
16696 - Allow relays to use directory mirrors without a DirPort: these
16697 relays need to be contacted over their ORPorts using a begindir
16698 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
16699 - Clarify the message logged when a remote relay is unexpectedly
16700 missing an ORPort or DirPort: users were confusing this with a
16701 local port. Fixes another case of bug 20711; bugfix
16704 o Minor bugfixes (guards):
16705 - Don't warn about a missing guard state on timeout-measurement
16706 circuits: they aren't supposed to be using guards. Fixes an
16707 instance of bug 21007; bugfix on 0.3.0.1-alpha.
16708 - Silence a BUG() warning when attempting to use a guard whose
16709 descriptor we don't know, and make this scenario less likely to
16710 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
16712 o Minor bugfixes (hidden service):
16713 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
16714 cells. Previously, we were using sizeof() on a pointer, instead of
16715 the real destination buffer. Fortunately, that value was only used
16716 to double-check that there was enough room--which was already
16717 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
16719 o Minor bugfixes (testing):
16720 - Fix Raspbian build issues related to missing socket errno in
16721 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
16723 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
16724 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
16725 - Use bash in src/test/test-network.sh. This ensures we reliably
16726 call chutney's newer tools/test-network.sh when available. Fixes
16727 bug 21562; bugfix on 0.2.9.1-alpha.
16730 - Small fixes to the fuzzing documentation. Closes ticket 21472.
16733 Changes in version 0.2.9.10 - 2017-03-01
16734 Tor 0.2.9.10 backports a security fix from later Tor release. It also
16735 includes fixes for some major issues affecting directory authorities,
16736 LibreSSL compatibility, and IPv6 correctness.
16738 The Tor 0.2.9.x release series is now marked as a long-term-support
16739 series. We intend to backport security fixes to 0.2.9.x until at
16740 least January of 2020.
16742 o Major bugfixes (directory authority, 0.3.0.3-alpha):
16743 - During voting, when marking a relay as a probable sybil, do not
16744 clear its BadExit flag: sybils can still be bad in other ways
16745 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16748 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
16749 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16750 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16751 exit policy rejects that port on more than an IPv6 /16 of
16752 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16753 which rejected a relay's own IPv6 address by default. Fixes bug
16754 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16756 o Major bugfixes (parsing, also in 0.3.0.4-rc):
16757 - Fix an integer underflow bug when comparing malformed Tor
16758 versions. This bug could crash Tor when built with
16759 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16760 0.2.9.8, which were built with -ftrapv by default. In other cases
16761 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16762 on 0.0.8pre1. Found by OSS-Fuzz.
16764 o Minor features (directory authorities, also in 0.3.0.4-rc):
16765 - Directory authorities now reject descriptors that claim to be
16766 malformed versions of Tor. Helps prevent exploitation of
16768 - Reject version numbers with components that exceed INT32_MAX.
16769 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16770 Fixes bug 21450; bugfix on 0.0.8pre1.
16772 o Minor features (geoip):
16773 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16776 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
16777 - Autoconf now checks to determine if OpenSSL structures are opaque,
16778 instead of explicitly checking for OpenSSL version numbers. Part
16780 - Support building with recent LibreSSL code that uses opaque
16781 structures. Closes ticket 21359.
16783 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
16784 - Repair a couple of (unreachable or harmless) cases of the risky
16785 comparison-by-subtraction pattern that caused bug 21278.
16787 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
16788 - The tor-resolve command line tool now rejects hostnames over 255
16789 characters in length. Previously, it would silently truncate them,
16790 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16791 Patch by "junglefowl".
16794 Changes in version 0.3.0.3-alpha - 2017-02-03
16795 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
16796 0.3.0.x development series, including some that could cause
16797 authorities to behave badly. There is also a fix for a longstanding
16798 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
16799 includes some smaller features and bugfixes.
16801 The Tor 0.3.0.x release series is now in patch-freeze: no additional
16802 features will be considered for inclusion in 0.3.0.x. We suspect that
16803 some bugs will probably remain, however, and we encourage people to
16806 o Major bugfixes (directory authority):
16807 - During voting, when marking a relay as a probable sybil, do not
16808 clear its BadExit flag: sybils can still be bad in other ways
16809 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16811 - When deciding whether we have just found a router to be reachable,
16812 do not penalize it for not having performed an Ed25519 link
16813 handshake if it does not claim to support an Ed25519 handshake.
16814 Previously, we would treat such relays as non-running. Fixes bug
16815 21107; bugfix on 0.3.0.1-alpha.
16817 o Major bugfixes (entry guards):
16818 - Stop trying to build circuits through entry guards for which we
16819 have no descriptor. Also, stop crashing in the case that we *do*
16820 accidentally try to build a circuit in such a state. Fixes bug
16821 21242; bugfix on 0.3.0.1-alpha.
16823 o Major bugfixes (IPv6 Exits):
16824 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16825 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16826 exit policy rejects that port on more than an IPv6 /16 of
16827 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16828 which rejected a relay's own IPv6 address by default. Fixes bug
16829 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16831 o Minor feature (client):
16832 - Enable IPv6 traffic on the SocksPort by default. To disable this,
16833 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
16835 o Minor feature (fallback scripts):
16836 - Add a check_existing mode to updateFallbackDirs.py, which checks
16837 if fallbacks in the hard-coded list are working. Closes ticket
16838 20174. Patch by haxxpop.
16840 o Minor features (ciphersuite selection):
16841 - Clients now advertise a list of ciphersuites closer to the ones
16842 preferred by Firefox. Closes part of ticket 15426.
16843 - Allow relays to accept a wider range of ciphersuites, including
16844 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
16846 o Minor features (controller, configuration):
16847 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
16848 and so on, now comes with a __*Port variant that will not be saved
16849 to the torrc file by the controller's SAVECONF command. This
16850 change allows TorBrowser to set up a single-use domain socket for
16851 each time it launches Tor. Closes ticket 20956.
16852 - The GETCONF command can now query options that may only be
16853 meaningful in context-sensitive lists. This allows the controller
16854 to query the mixed SocksPort/__SocksPort style options introduced
16855 in feature 20956. Implements ticket 21300.
16857 o Minor features (portability, compilation):
16858 - Autoconf now checks to determine if OpenSSL structures are opaque,
16859 instead of explicitly checking for OpenSSL version numbers. Part
16861 - Support building with recent LibreSSL code that uses opaque
16862 structures. Closes ticket 21359.
16864 o Minor features (relay):
16865 - We now allow separation of exit and relay traffic to different
16866 source IP addresses, using the OutboundBindAddressExit and
16867 OutboundBindAddressOR options respectively. Closes ticket 17975.
16868 Written by Michael Sonntag.
16870 o Minor bugfix (logging):
16871 - Don't recommend the use of Tor2web in non-anonymous mode.
16872 Recommending Tor2web is a bad idea because the client loses all
16873 anonymity. Tor2web should only be used in specific cases by users
16874 who *know* and understand the issues. Fixes bug 21294; bugfix
16877 o Minor bugfixes (client):
16878 - Always recover from failures in extend_info_from_node(), in an
16879 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
16880 bugfix on 0.2.3.1-alpha.
16882 o Minor bugfixes (client, entry guards):
16883 - Fix a bug warning (with backtrace) when we fail a channel that
16884 circuits to fallback directories on it. Fixes bug 21128; bugfix
16886 - Fix a spurious bug warning (with backtrace) when removing an
16887 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
16888 - Fix a bug of the new guard algorithm where tor could stall for up
16889 to 10 minutes before retrying a guard after a long period of no
16890 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
16891 - Do not try to build circuits until we have descriptors for our
16892 primary entry guards. Related to fix for bug 21242.
16894 o Minor bugfixes (configure, autoconf):
16895 - Rename the configure option --enable-expensive-hardening to
16896 --enable-fragile-hardening. Expensive hardening makes the tor
16897 daemon abort when some kinds of issues are detected. Thus, it
16898 makes tor more at risk of remote crashes but safer against RCE or
16899 heartbleed bug category. We now try to explain this issue in a
16900 message from the configure script. Fixes bug 21290; bugfix
16903 o Minor bugfixes (controller):
16904 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
16905 20824; bugfix on 0.3.0.1-alpha.
16907 o Minor bugfixes (hidden service):
16908 - Clean up the code for expiring intro points with no associated
16909 circuits. It was causing, rarely, a service with some expiring
16910 introduction points to not open enough additional introduction
16911 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
16912 - Stop setting the torrc option HiddenServiceStatistics to "0" just
16913 because we're not a bridge or relay. Instead, we preserve whatever
16914 value the user set (or didn't set). Fixes bug 21150; bugfix
16916 - Resolve two possible underflows which could lead to creating and
16917 closing a lot of introduction point circuits in a non-stop loop.
16918 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
16920 o Minor bugfixes (portability):
16921 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
16922 It is supported by OpenBSD itself, and also by most OpenBSD
16923 variants (such as Bitrig). Fixes bug 20980; bugfix
16925 - When mapping a file of length greater than SIZE_MAX, do not
16926 silently truncate its contents. This issue could occur on 32 bit
16927 systems with large file support and files which are larger than 4
16928 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
16930 o Minor bugfixes (tor-resolve):
16931 - The tor-resolve command line tool now rejects hostnames over 255
16932 characters in length. Previously, it would silently truncate them,
16933 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16934 Patch by "junglefowl".
16936 o Minor bugfixes (Windows services):
16937 - Be sure to initialize the monotonic time subsystem before using
16938 it, even when running as an NT service. Fixes bug 21356; bugfix
16942 Changes in version 0.3.0.2-alpha - 2017-01-23
16943 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
16944 cause relays and clients to crash, even if they were not built with
16945 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16946 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16947 version should upgrade.
16949 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
16950 time-to-live values, makes directory authorities enforce the 1-to-1
16951 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
16952 client-side onion service reachability bug, does better at selecting
16953 the set of fallback directories, and more.
16955 o Major bugfixes (security, also in 0.2.9.9):
16956 - Downgrade the "-ftrapv" option from "always on" to "only on when
16957 --enable-expensive-hardening is provided." This hardening option, like
16958 others, can turn survivable bugs into crashes--and having it on by
16959 default made a (relatively harmless) integer overflow bug into a
16960 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
16963 o Major features (security):
16964 - Change the algorithm used to decide DNS TTLs on client and server
16965 side, to better resist DNS-based correlation attacks like the
16966 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
16967 Feamster. Now relays only return one of two possible DNS TTL
16968 values, and clients are willing to believe DNS TTL values up to 3
16969 hours long. Closes ticket 19769.
16971 o Major features (directory authority, security):
16972 - The default for AuthDirPinKeys is now 1: directory authorities
16973 will reject relays where the RSA identity key matches a previously
16974 seen value, but the Ed25519 key has changed. Closes ticket 18319.
16976 o Major bugfixes (client, guard, crash):
16977 - In circuit_get_global_origin_list(), return the actual list of
16978 origin circuits. The previous version of this code returned the
16979 list of all the circuits, and could have caused strange bugs,
16980 including possible crashes. Fixes bug 21118; bugfix
16983 o Major bugfixes (client, onion service, also in 0.2.9.9):
16984 - Fix a client-side onion service reachability bug, where multiple
16985 socks requests to an onion service (or a single slow request)
16986 could cause us to mistakenly mark some of the service's
16987 introduction points as failed, and we cache that failure so
16988 eventually we run out and can't reach the service. Also resolves a
16989 mysterious "Remote server sent bogus reason code 65021" log
16990 warning. The bug was introduced in ticket 17218, where we tried to
16991 remember the circuit end reason as a uint16_t, which mangled
16992 negative values. Partially fixes bug 21056 and fixes bug 20307;
16993 bugfix on 0.2.8.1-alpha.
16995 o Major bugfixes (DNS):
16996 - Fix a bug that prevented exit nodes from caching DNS records for
16997 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
16999 o Minor features (controller):
17000 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
17001 shared-random values to the controller. Closes ticket 19925.
17003 o Minor features (entry guards):
17004 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
17005 break regression tests.
17006 - Require UseEntryGuards when UseBridges is set, in order to make
17007 sure bridges aren't bypassed. Resolves ticket 20502.
17009 o Minor features (fallback directories):
17010 - Select 200 fallback directories for each release. Closes
17012 - Allow 3 fallback relays per operator, which is safe now that we
17013 are choosing 200 fallback relays. Closes ticket 20912.
17014 - Exclude relays affected by bug 20499 from the fallback list.
17015 Exclude relays from the fallback list if they are running versions
17016 known to be affected by bug 20499, or if in our tests they deliver
17017 a stale consensus (i.e. one that expired more than 24 hours ago).
17018 Closes ticket 20539.
17019 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
17021 - Require fallback directories to have the same address and port for
17022 7 days (now that we have enough relays with this stability).
17023 Relays whose OnionOO stability timer is reset on restart by bug
17024 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
17025 this issue. Closes ticket 20880; maintains short-term fix
17027 - Require fallbacks to have flags for 90% of the time (weighted
17028 decaying average), rather than 95%. This allows at least 73% of
17029 clients to bootstrap in the first 5 seconds without contacting an
17030 authority. Part of ticket 18828.
17031 - Annotate updateFallbackDirs.py with the bandwidth and consensus
17032 weight for each candidate fallback. Closes ticket 20878.
17033 - Make it easier to change the output sort order of fallbacks.
17034 Closes ticket 20822.
17035 - Display the relay fingerprint when downloading consensuses from
17036 fallbacks. Closes ticket 20908.
17038 o Minor features (geoip, also in 0.2.9.9):
17039 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17042 o Minor features (next-gen onion service directories):
17043 - Remove the "EnableOnionServicesV3" consensus parameter that we
17044 introduced in 0.3.0.1-alpha: relays are now always willing to act
17045 as v3 onion service directories. Resolves ticket 19899.
17047 o Minor features (linting):
17048 - Enhance the changes file linter to warn on Tor versions that are
17049 prefixed with "tor-". Closes ticket 21096.
17051 o Minor features (logging):
17052 - In several places, describe unset ed25519 keys as "<unset>",
17053 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
17055 o Minor bugfix (control protocol):
17056 - The reply to a "GETINFO config/names" request via the control
17057 protocol now spells the type "Dependent" correctly. This is a
17058 breaking change in the control protocol. (The field seems to be
17059 ignored by the most common known controllers.) Fixes bug 18146;
17060 bugfix on 0.1.1.4-alpha.
17062 o Minor bugfixes (bug resilience):
17063 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
17064 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
17065 Hans Jerry Illikainen.
17067 o Minor bugfixes (build):
17068 - Replace obsolete Autoconf macros with their modern equivalent and
17069 prevent similar issues in the future. Fixes bug 20990; bugfix
17072 o Minor bugfixes (client, guards):
17073 - Fix bug where Tor would think that there are circuits waiting for
17074 better guards even though those circuits have been freed. Fixes
17075 bug 21142; bugfix on 0.3.0.1-alpha.
17077 o Minor bugfixes (config):
17078 - Don't assert on startup when trying to get the options list and
17079 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
17080 options so of course they aren't ready yet. Fixes bug 21062;
17081 bugfix on 0.2.9.3-alpha.
17083 o Minor bugfixes (controller):
17084 - Make the GETINFO interface for inquiring about entry guards
17085 support the new guards backend. Fixes bug 20823; bugfix
17088 o Minor bugfixes (dead code):
17089 - Remove a redundant check for PidFile changes at runtime in
17090 options_transition_allowed(): this check is already performed
17091 regardless of whether the sandbox is active. Fixes bug 21123;
17092 bugfix on 0.2.5.4-alpha.
17094 o Minor bugfixes (documentation):
17095 - Update the tor manual page to document every option that can not
17096 be changed while tor is running. Fixes bug 21122.
17098 o Minor bugfixes (fallback directories):
17099 - Stop failing when a relay has no uptime data in
17100 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
17101 - Avoid checking fallback candidates' DirPorts if they are down in
17102 OnionOO. When a relay operator has multiple relays, this
17103 prioritizes relays that are up over relays that are down. Fixes
17104 bug 20926; bugfix on 0.2.8.3-alpha.
17105 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
17106 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
17108 o Minor bugfixes (guards, bootstrapping):
17109 - When connecting to a directory guard during bootstrap, do not mark
17110 the guard as successful until we receive a good-looking directory
17111 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
17113 o Minor bugfixes (onion services):
17114 - Fix the config reload pruning of old vs new services so it
17115 actually works when both ephemeral and non-ephemeral services are
17116 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
17117 - Allow the number of introduction points to be as low as 0, rather
17118 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
17120 o Minor bugfixes (IPv6):
17121 - Make IPv6-using clients try harder to find an IPv6 directory
17122 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
17123 - When IPv6 addresses have not been downloaded yet (microdesc
17124 consensus documents don't list relay IPv6 addresses), use hard-
17125 coded addresses for authorities, fallbacks, and configured
17126 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
17127 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
17129 o Minor bugfixes (memory leaks):
17130 - Fix a memory leak when configuring hidden services. Fixes bug
17131 20987; bugfix on 0.3.0.1-alpha.
17133 o Minor bugfixes (portability, also in 0.2.9.9):
17134 - Avoid crashing when Tor is built using headers that contain
17135 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17136 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17138 - Fix Libevent detection on platforms without Libevent 1 headers
17139 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17141 o Minor bugfixes (relay):
17142 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
17143 initializing the keys would reset the DataDirectory to 0700
17144 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
17145 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
17147 o Minor bugfixes (testing):
17148 - Remove undefined behavior from the backtrace generator by removing
17149 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
17151 o Minor bugfixes (unit tests):
17152 - Allow the unit tests to pass even when DNS lookups of bogus
17153 addresses do not fail as expected. Fixes bug 20862 and 20863;
17154 bugfix on unit tests introduced in 0.2.8.1-alpha
17155 through 0.2.9.4-alpha.
17157 o Code simplification and refactoring:
17158 - Refactor code to manipulate global_origin_circuit_list into
17159 separate functions. Closes ticket 20921.
17161 o Documentation (formatting):
17162 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
17163 blocks were incorrectly appearing. Closes ticket 20885.
17165 o Documentation (man page):
17166 - Clarify many options in tor.1 and add some min/max values for
17167 HiddenService options. Closes ticket 21058.
17170 Changes in version 0.2.9.9 - 2017-01-23
17171 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
17172 cause relays and clients to crash, even if they were not built with
17173 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
17174 versions, and also affects 0.3.0.1-alpha: all relays running an affected
17175 version should upgrade.
17177 This release also resolves a client-side onion service reachability
17178 bug, and resolves a pair of small portability issues.
17180 o Major bugfixes (security):
17181 - Downgrade the "-ftrapv" option from "always on" to "only on when
17182 --enable-expensive-hardening is provided." This hardening option,
17183 like others, can turn survivable bugs into crashes -- and having
17184 it on by default made a (relatively harmless) integer overflow bug
17185 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
17186 bugfix on 0.2.9.1-alpha.
17188 o Major bugfixes (client, onion service):
17189 - Fix a client-side onion service reachability bug, where multiple
17190 socks requests to an onion service (or a single slow request)
17191 could cause us to mistakenly mark some of the service's
17192 introduction points as failed, and we cache that failure so
17193 eventually we run out and can't reach the service. Also resolves a
17194 mysterious "Remote server sent bogus reason code 65021" log
17195 warning. The bug was introduced in ticket 17218, where we tried to
17196 remember the circuit end reason as a uint16_t, which mangled
17197 negative values. Partially fixes bug 21056 and fixes bug 20307;
17198 bugfix on 0.2.8.1-alpha.
17200 o Minor features (geoip):
17201 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
17204 o Minor bugfixes (portability):
17205 - Avoid crashing when Tor is built using headers that contain
17206 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
17207 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
17209 - Fix Libevent detection on platforms without Libevent 1 headers
17210 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
17213 Changes in version 0.3.0.1-alpha - 2016-12-19
17214 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
17215 series. It strengthens Tor's link and circuit handshakes by
17216 identifying relays by their Ed25519 keys, improves the algorithm that
17217 clients use to choose and maintain their list of guards, and includes
17218 additional backend support for the next-generation hidden service
17219 design. It also contains numerous other small features and
17220 improvements to security, correctness, and performance.
17222 Below are the changes since 0.2.9.8.
17224 o Major features (guard selection algorithm):
17225 - Tor's guard selection algorithm has been redesigned from the
17226 ground up, to better support unreliable networks and restrictive
17227 sets of entry nodes, and to better resist guard-capture attacks by
17228 hostile local networks. Implements proposal 271; closes
17231 o Major features (next-generation hidden services):
17232 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
17233 prop224 aka "Next Generation Hidden Services". Service and clients
17234 don't use this functionality yet. Closes ticket 19043. Based on
17235 initial code by Alec Heifetz.
17236 - Relays now support the HSDir version 3 protocol, so that they can
17237 can store and serve v3 descriptors. This is part of the next-
17238 generation onion service work detailed in proposal 224. Closes
17241 o Major features (protocol, ed25519 identity keys):
17242 - Relays now use Ed25519 to prove their Ed25519 identities and to
17243 one another, and to clients. This algorithm is faster and more
17244 secure than the RSA-based handshake we've been doing until now.
17245 Implements the second big part of proposal 220; Closes
17247 - Clients now support including Ed25519 identity keys in the EXTEND2
17248 cells they generate. By default, this is controlled by a consensus
17249 parameter, currently disabled. You can turn this feature on for
17250 testing by setting ExtendByEd25519ID in your configuration. This
17251 might make your traffic appear different than the traffic
17252 generated by other users, however. Implements part of ticket
17253 15056; part of proposal 220.
17254 - Relays now understand requests to extend to other relays by their
17255 Ed25519 identity keys. When an Ed25519 identity key is included in
17256 an EXTEND2 cell, the relay will only extend the circuit if the
17257 other relay can prove ownership of that identity. Implements part
17258 of ticket 15056; part of proposal 220.
17260 o Major bugfixes (scheduler):
17261 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17262 caused the channel scheduler to behave more or less randomly,
17263 rather than preferring channels with higher-priority circuits.
17264 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17266 o Minor features (controller):
17267 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17268 rather than "unrecognized." Closes ticket 20389; patch from
17271 o Minor features (diagnostic, directory client):
17272 - Warn when we find an unexpected inconsistency in directory
17273 download status objects. Prevents some negative consequences of
17276 o Minor features (directory authority):
17277 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17278 default) to control whether authorities should try to probe relays
17279 by their Ed25519 link keys. This option will go away in a few
17280 releases--unless we encounter major trouble in our ed25519 link
17281 protocol rollout, in which case it will serve as a safety option.
17283 o Minor features (directory cache):
17284 - Relays and bridges will now refuse to serve the consensus they
17285 have if they know it is too old for a client to use. Closes
17288 o Minor features (ed25519 link handshake):
17289 - Advertise support for the ed25519 link handshake using the
17290 subprotocol-versions mechanism, so that clients can tell which
17291 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17293 o Minor features (fingerprinting resistance, authentication):
17294 - Extend the length of RSA keys used for TLS link authentication to
17295 2048 bits. (These weren't used for forward secrecy; for forward
17296 secrecy, we used P256.) Closes ticket 13752.
17298 o Minor features (infrastructure):
17299 - Implement smartlist_add_strdup() function. Replaces the use of
17300 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17302 o Minor bugfixes (client):
17303 - When clients that use bridges start up with a cached consensus on
17304 disk, they were ignoring it and downloading a new one. Now they
17305 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17307 o Minor bugfixes (configuration):
17308 - Accept non-space whitespace characters after the severity level in
17309 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17310 - Support "TByte" and "TBytes" units in options given in bytes.
17311 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17312 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17314 o Minor bugfixes (consensus weight):
17315 - Add new consensus method that initializes bw weights to 1 instead
17316 of 0. This prevents a zero weight from making it all the way to
17317 the end (happens in small testing networks) and causing an error.
17318 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17320 o Minor bugfixes (descriptors):
17321 - Correctly recognise downloaded full descriptors as valid, even
17322 when using microdescriptors as circuits. This affects clients with
17323 FetchUselessDescriptors set, and may affect directory authorities.
17324 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17326 o Minor bugfixes (directory system):
17327 - Download all consensus flavors, descriptors, and authority
17328 certificates when FetchUselessDescriptors is set, regardless of
17329 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17330 on all recent tor versions.
17331 - Bridges and relays now use microdescriptors (like clients do)
17332 rather than old-style router descriptors. Now bridges will blend
17333 in with clients in terms of the circuits they build. Fixes bug
17334 6769; bugfix on 0.2.3.2-alpha.
17336 o Minor bugfixes (ed25519 certificates):
17337 - Correctly interpret ed25519 certificates that would expire some
17338 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17340 o Minor bugfixes (hidden services):
17341 - Stop ignoring misconfigured hidden services. Instead, refuse to
17342 start tor until the misconfigurations have been corrected. Fixes
17343 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17346 o Minor bugfixes (memory leak at exit):
17347 - Fix a small harmless memory leak at exit of the previously unused
17348 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17351 o Minor bugfixes (util):
17352 - When finishing writing a file to disk, if we were about to replace
17353 the file with the temporary file created before and we fail to
17354 replace it, remove the temporary file so it doesn't stay on disk.
17355 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17357 o Minor bugfixes (Windows):
17358 - Check for getpagesize before using it to mmap files. This fixes
17359 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17360 0.1.2.1-alpha. Reported by "ice".
17362 o Code simplification and refactoring:
17363 - Abolish all global guard context in entrynodes.c; replace with new
17364 guard_selection_t structure as preparation for proposal 271.
17365 Closes ticket 19858.
17366 - Introduce rend_service_is_ephemeral() that tells if given onion
17367 service is ephemeral. Replace unclear NULL-checkings for service
17368 directory with this function. Closes ticket 20526.
17369 - Extract magic numbers in circuituse.c into defined variables.
17370 - Refactor circuit_is_available_for_use to remove unnecessary check.
17371 - Refactor circuit_predict_and_launch_new for readability and
17372 testability. Closes ticket 18873.
17373 - Refactor large if statement in purpose_needs_anonymity to use
17374 switch statement instead. Closes part of ticket 20077.
17375 - Refactor the hashing API to return negative values for errors, as
17376 is done as throughout the codebase. Closes ticket 20717.
17377 - Remove data structures that were used to index or_connection
17378 objects by their RSA identity digests. These structures are fully
17379 redundant with the similar structures used in the
17380 channel abstraction.
17381 - Remove duplicate code in the channel_write_*cell() functions.
17382 Closes ticket 13827; patch from Pingl.
17383 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17384 use only purpose_needs_anonymity. Closes part of ticket 20077.
17385 - The code to generate and parse EXTEND and EXTEND2 cells has been
17386 replaced with code automatically generated by the
17390 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17391 20622; bugfix on 0.2.5.1-alpha.
17392 - Change '1' to 'weight_scale' in consensus bw weights calculation
17393 comments, as that is reality. Closes ticket 20273. Patch
17395 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17396 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17398 - Stop the man page from incorrectly stating that HiddenServiceDir
17399 must already exist. Fixes 20486.
17400 - Clarify that when ClientRejectInternalAddresses is enabled (which
17401 is the default), multicast DNS hostnames for machines on the local
17402 network (of the form *.local) are also rejected. Closes
17405 o Removed features:
17406 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17407 limit for relays running on a single IP applies to authority IP
17408 addresses as well as to non-authority IP addresses. Closes
17410 - The UseDirectoryGuards torrc option no longer exists: all users
17411 that use entry guards will also use directory guards. Related to
17412 proposal 271; implements part of ticket 20831.
17415 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17416 from "overcaffeinated".
17417 - Perform the coding style checks when running the tests and fail
17418 when coding style violations are found. Closes ticket 5500.
17419 - Add tests for networkstatus_compute_bw_weights_v10.
17420 - Add unit tests circuit_predict_and_launch_new.
17421 - Extract dummy_origin_circuit_new so it can be used by other
17425 Changes in version 0.2.8.12 - 2016-12-19
17426 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17427 below) where Tor clients could crash when attempting to visit a
17428 hostile hidden service. Clients are recommended to upgrade as packages
17429 become available for their systems.
17431 It also includes an updated list of fallback directories, backported
17434 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17435 backported to 0.2.8 in the future.
17437 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17438 - Fix a bug in parsing that could cause clients to read a single
17439 byte past the end of an allocated region. This bug could be used
17440 to cause hardened clients (built with --enable-expensive-hardening)
17441 to crash if they tried to visit a hostile hidden service. Non-
17442 hardened clients are only affected depending on the details of
17443 their platform's memory allocator. Fixes bug 21018; bugfix on
17444 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17445 2016-12-002 and as CVE-2016-1254.
17447 o Minor features (fallback directory list, backported from 0.2.9.8):
17448 - Replace the 81 remaining fallbacks of the 100 originally
17449 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17450 fallbacks (123 new, 54 existing, 27 removed) generated in December
17451 2016. Resolves ticket 20170.
17453 o Minor features (geoip, backported from 0.2.9.7-rc):
17454 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17458 Changes in version 0.2.9.8 - 2016-12-19
17459 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
17461 The Tor 0.2.9 series makes mandatory a number of security features
17462 that were formerly optional. It includes support for a new shared-
17463 randomness protocol that will form the basis for next generation
17464 hidden services, includes a single-hop hidden service mode for
17465 optimizing .onion services that don't actually want to be hidden,
17466 tries harder not to overload the directory authorities with excessive
17467 downloads, and supports a better protocol versioning scheme for
17468 improved compatibility with other implementations of the Tor protocol.
17470 And of course, there are numerous other bugfixes and improvements.
17472 This release also includes a fix for a medium-severity issue (bug
17473 21018 below) where Tor clients could crash when attempting to visit a
17474 hostile hidden service. Clients are recommended to upgrade as packages
17475 become available for their systems.
17477 Below are the changes since 0.2.9.7-rc. For a list of all changes
17478 since 0.2.8, see the ReleaseNotes file.
17480 o Major bugfixes (parsing, security):
17481 - Fix a bug in parsing that could cause clients to read a single
17482 byte past the end of an allocated region. This bug could be used
17483 to cause hardened clients (built with --enable-expensive-hardening)
17484 to crash if they tried to visit a hostile hidden service. Non-
17485 hardened clients are only affected depending on the details of
17486 their platform's memory allocator. Fixes bug 21018; bugfix on
17487 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17488 2016-12-002 and as CVE-2016-1254.
17490 o Minor features (fallback directory list):
17491 - Replace the 81 remaining fallbacks of the 100 originally
17492 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17493 fallbacks (123 new, 54 existing, 27 removed) generated in December
17494 2016. Resolves ticket 20170.
17497 Changes in version 0.2.9.7-rc - 2016-12-12
17498 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
17499 including a few that had prevented tests from passing on
17502 o Minor features (geoip):
17503 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17506 o Minor bugfix (build):
17507 - The current Git revision when building from a local repository is
17508 now detected correctly when using git worktrees. Fixes bug 20492;
17509 bugfix on 0.2.3.9-alpha.
17511 o Minor bugfixes (directory authority):
17512 - When computing old Tor protocol line version in protover, we were
17513 looking at 0.2.7.5 twice instead of a specific case for
17514 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
17516 o Minor bugfixes (download scheduling):
17517 - Resolve a "bug" warning when considering a download schedule whose
17518 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
17520 o Minor bugfixes (logging):
17521 - Downgrade a harmless log message about the
17522 pending_entry_connections list from "warn" to "info". Mitigates
17525 o Minor bugfixes (memory leak):
17526 - Fix a small memory leak when receiving AF_UNIX connections on a
17527 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
17528 - When moving a signed descriptor object from a source to an
17529 existing destination, free the allocated memory inside that
17530 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
17532 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
17533 - Fix a memory leak and use-after-free error when removing entries
17534 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
17535 0.2.5.5-alpha. Patch from "cypherpunks".
17537 o Minor bugfixes (portability):
17538 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
17539 Fixes bug 20935; bugfix on 0.2.9.6-rc.
17541 o Minor bugfixes (unit tests):
17542 - Stop expecting NetBSD unit tests to report success for ipfw. Part
17543 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
17544 - Fix tolerances in unit tests for monotonic time comparisons
17545 between nanoseconds and microseconds. Previously, we accepted a 10
17546 us difference only, which is not realistic on every platform's
17547 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
17548 - Remove a double-free in the single onion service unit test. Stop
17549 ignoring a return value. Make future changes less error-prone.
17550 Fixes bug 20864; bugfix on 0.2.9.6-rc.
17553 Changes in version 0.2.8.11 - 2016-12-08
17554 Tor 0.2.8.11 backports fixes for additional portability issues that
17555 could prevent Tor from building correctly on OSX Sierra, or with
17556 OpenSSL 1.1. Affected users should upgrade; others can safely stay
17559 o Minor bugfixes (portability):
17560 - Avoid compilation errors when building on OSX Sierra. Sierra began
17561 to support the getentropy() and clock_gettime() APIs, but created
17562 a few problems in doing so. Tor 0.2.9 has a more thorough set of
17563 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17564 monotonic time interfaces. Fixes bug 20865. Bugfix
17567 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17568 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17569 architectures. Closes ticket 20588.
17572 Changes in version 0.2.8.10 - 2016-12-02
17573 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17574 unusable after they left standby mode. It also backports fixes for
17575 a few portability issues and a small but problematic memory leak.
17577 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17578 - When Tor leaves standby because of a new application request, open
17579 circuits as needed to serve that request. Previously, we would
17580 potentially wait a very long time. Fixes part of bug 19969; bugfix
17583 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
17584 - Clients now respond to new application stream requests immediately
17585 when they arrive, rather than waiting up to one second before
17586 starting to handle them. Fixes part of bug 19969; bugfix
17589 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
17590 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17591 successfully targeting earlier versions of OSX. Resolves
17594 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17595 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17596 20551; bugfix on 0.2.1.1-alpha.
17598 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
17599 - Work around a memory leak in OpenSSL 1.1 when encoding public
17600 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17602 o Minor features (geoip):
17603 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17606 Changes in version 0.2.9.6-rc - 2016-12-02
17607 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
17608 version. We hope that it will be ready to become stable soon, and we
17609 encourage everyone to test this release. If no showstopper bugs are
17610 found here, the next 0.2.9 release will be stable.
17612 o Major bugfixes (relay, resolver, logging):
17613 - For relays that don't know their own address, avoid attempting a
17614 local hostname resolve for each descriptor we download. This
17615 will cut down on the number of "Success: chose address 'x.x.x.x'"
17616 log lines, and also avoid confusing clock jumps if the resolver
17617 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
17619 o Minor bugfixes (client, fascistfirewall):
17620 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
17621 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
17623 o Minor bugfixes (hidden services):
17624 - Stop ignoring the anonymity status of saved keys for hidden
17625 services and single onion services when first starting tor.
17626 Instead, refuse to start tor if any hidden service key has been
17627 used in a different hidden service anonymity mode. Fixes bug
17628 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
17630 o Minor bugfixes (portability):
17631 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17632 successfully targeting earlier versions of OSX. Resolves
17634 - Run correctly when built on Windows build environments that
17635 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
17637 o Minor bugfixes (single onion services, Tor2web):
17638 - Stop complaining about long-term one-hop circuits deliberately
17639 created by single onion services and Tor2web. These log messages
17640 are intended to diagnose issue 8387, which relates to circuits
17641 hanging around forever for no reason. Fixes bug 20613; bugfix on
17642 0.2.9.1-alpha. Reported by "pastly".
17644 o Minor bugfixes (unit tests):
17645 - Stop spurious failures in the local interface address discovery
17646 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
17650 - Correct the minimum bandwidth value in torrc.sample, and queue a
17651 corresponding change for torrc.minimal. Closes ticket 20085.
17654 Changes in version 0.2.9.5-alpha - 2016-11-08
17655 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
17656 version. We believe one or two probably remain, and we encourage
17657 everyone to test this release.
17659 o Major bugfixes (client performance):
17660 - Clients now respond to new application stream requests immediately
17661 when they arrive, rather than waiting up to one second before
17662 starting to handle them. Fixes part of bug 19969; bugfix
17665 o Major bugfixes (client reliability):
17666 - When Tor leaves standby because of a new application request, open
17667 circuits as needed to serve that request. Previously, we would
17668 potentially wait a very long time. Fixes part of bug 19969; bugfix
17671 o Major bugfixes (download scheduling):
17672 - When using an exponential backoff schedule, do not give up on
17673 downloading just because we have failed a bunch of times. Since
17674 each delay is longer than the last, retrying indefinitely won't
17675 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
17676 - If a consensus expires while we are waiting for certificates to
17677 download, stop waiting for certificates.
17678 - If we stop waiting for certificates less than a minute after we
17679 started downloading them, do not consider the certificate download
17680 failure a separate failure. Fixes bug 20533; bugfix
17682 - Remove the maximum delay on exponential-backoff scheduling. Since
17683 we now allow an infinite number of failures (see ticket 20536), we
17684 must now allow the time to grow longer on each failure. Fixes part
17685 of bug 20534; bugfix on 0.2.9.1-alpha.
17686 - Make our initial download delays closer to those from 0.2.8. Fixes
17687 another part of bug 20534; bugfix on 0.2.9.1-alpha.
17688 - When determining when to download a directory object, handle times
17689 after 2038 if the operating system supports them. (Someday this
17690 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
17691 - When using exponential backoff in test networks, use a lower
17692 exponent, so the delays do not vary as much. This helps test
17693 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
17695 o Minor features (geoip):
17696 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17699 o Minor bugfixes (client directory scheduling):
17700 - Treat "relay too busy to answer request" as a failed request and a
17701 reason to back off on our retry frequency. This is safe now that
17702 exponential backoffs retry indefinitely, and avoids a bug where we
17703 would reset our download schedule erroneously. Fixes bug 20593;
17704 bugfix on 0.2.9.1-alpha.
17706 o Minor bugfixes (client, logging):
17707 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
17708 assume all nodes support EXTEND2. Use ntor whenever a key is
17709 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
17710 - On DNSPort, stop logging a BUG warning on a failed hostname
17711 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
17713 o Minor bugfixes (hidden services):
17714 - When configuring hidden services, check every hidden service
17715 directory's permissions. Previously, we only checked the last
17716 hidden service. Fixes bug 20529; bugfix the work to fix 13942
17719 o Minor bugfixes (portability):
17720 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17721 architectures. Closes ticket 20588.
17722 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
17723 removed the ECDH ciphers which caused the tests to fail on
17724 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
17725 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17726 20551; bugfix on 0.2.1.1-alpha.
17728 o Minor bugfixes (relay bootstrap):
17729 - Ensure relays don't make multiple connections during bootstrap.
17730 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
17732 o Minor bugfixes (relay):
17733 - Work around a memory leak in OpenSSL 1.1 when encoding public
17734 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17735 - Avoid a small memory leak when informing worker threads about
17736 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
17737 - Do not try to parallelize workers more than 16x without the user
17738 explicitly configuring us to do so, even if we do detect more than
17739 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17741 o Minor bugfixes (single onion services):
17742 - Start correctly when creating a single onion service in a
17743 directory that did not previously exist. Fixes bug 20484; bugfix
17746 o Minor bugfixes (testing):
17747 - Avoid a unit test failure on systems with over 16 detectable CPU
17748 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17751 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
17752 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
17753 - Module-level documentation for several more modules. Closes
17754 tickets 19287 and 19290.
17757 Changes in version 0.2.8.9 - 2016-10-17
17758 Tor 0.2.8.9 backports a fix for a security hole in previous versions
17759 of Tor that would allow a remote attacker to crash a Tor client,
17760 hidden service, relay, or authority. All Tor users should upgrade to
17761 this version, or to 0.2.9.4-alpha. Patches will be released for older
17764 o Major features (security fixes, also in 0.2.9.4-alpha):
17765 - Prevent a class of security bugs caused by treating the contents
17766 of a buffer chunk as if they were a NUL-terminated string. At
17767 least one such bug seems to be present in all currently used
17768 versions of Tor, and would allow an attacker to remotely crash
17769 most Tor instances, especially those compiled with extra compiler
17770 hardening. With this defense in place, such bugs can't crash Tor,
17771 though we should still fix them as they occur. Closes ticket
17772 20384 (TROVE-2016-10-001).
17774 o Minor features (geoip):
17775 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17779 Changes in version 0.2.9.4-alpha - 2016-10-17
17780 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
17781 that would allow a remote attacker to crash a Tor client, hidden
17782 service, relay, or authority. All Tor users should upgrade to this
17783 version, or to 0.2.8.9. Patches will be released for older versions
17786 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
17787 previous versions of Tor, including the implementation of a feature to
17788 future- proof the Tor ecosystem against protocol changes, some bug
17789 fixes necessary for Tor Browser to use unix domain sockets correctly,
17790 and several portability improvements. We anticipate that this will be
17791 the last alpha in the Tor 0.2.9 series, and that the next release will
17792 be a release candidate.
17794 o Major features (security fixes):
17795 - Prevent a class of security bugs caused by treating the contents
17796 of a buffer chunk as if they were a NUL-terminated string. At
17797 least one such bug seems to be present in all currently used
17798 versions of Tor, and would allow an attacker to remotely crash
17799 most Tor instances, especially those compiled with extra compiler
17800 hardening. With this defense in place, such bugs can't crash Tor,
17801 though we should still fix them as they occur. Closes ticket
17802 20384 (TROVE-2016-10-001).
17804 o Major features (subprotocol versions):
17805 - Tor directory authorities now vote on a set of recommended
17806 subprotocol versions, and on a set of required subprotocol
17807 versions. Clients and relays that lack support for a _required_
17808 subprotocol version will not start; those that lack support for a
17809 _recommended_ subprotocol version will warn the user to upgrade.
17810 Closes ticket 19958; implements part of proposal 264.
17811 - Tor now uses "subprotocol versions" to indicate compatibility.
17812 Previously, versions of Tor looked at the declared Tor version of
17813 a relay to tell whether they could use a given feature. Now, they
17814 should be able to rely on its declared subprotocol versions. This
17815 change allows compatible implementations of the Tor protocol(s) to
17816 exist without pretending to be 100% bug-compatible with particular
17817 releases of Tor itself. Closes ticket 19958; implements part of
17820 o Minor feature (fallback directories):
17821 - Remove broken fallbacks from the hard-coded fallback directory
17822 list. Closes ticket 20190; patch by teor.
17824 o Minor features (client, directory):
17825 - Since authorities now omit all routers that lack the Running and
17826 Valid flags, we assume that any relay listed in the consensus must
17827 have those flags. Closes ticket 20001; implements part of
17830 o Minor features (compilation, portability):
17831 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
17834 o Minor features (development tools, etags):
17835 - Teach the "make tags" Makefile target how to correctly find
17836 "MOCK_IMPL" function definitions. Patch from nherring; closes
17839 o Minor features (geoip):
17840 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17843 o Minor features (unix domain sockets):
17844 - When configuring a unix domain socket for a SocksPort,
17845 ControlPort, or Hidden service, you can now wrap the address in
17846 quotes, using C-style escapes inside the quotes. This allows unix
17847 domain socket paths to contain spaces.
17849 o Minor features (virtual addresses):
17850 - Increase the maximum number of bits for the IPv6 virtual network
17851 prefix from 16 to 104. In this way, the condition for address
17852 allocation is less restrictive. Closes ticket 20151; feature
17855 o Minor bugfixes (address discovery):
17856 - Stop reordering IP addresses returned by the OS. This makes it
17857 more likely that Tor will guess the same relay IP address every
17858 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
17859 Reported by René Mayrhofer, patch by "cypherpunks".
17861 o Minor bugfixes (client, unix domain sockets):
17862 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
17863 the client address is meaningless. Fixes bug 20261; bugfix
17866 o Minor bugfixes (compilation, OpenBSD):
17867 - Detect Libevent2 functions correctly on systems that provide
17868 libevent2, but where libevent1 is linked with -levent. Fixes bug
17869 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
17871 o Minor bugfixes (configuration):
17872 - When parsing quoted configuration values from the torrc file,
17873 handle windows line endings correctly. Fixes bug 19167; bugfix on
17874 0.2.0.16-alpha. Patch from "Pingl".
17876 o Minor bugfixes (getpass):
17877 - Defensively fix a non-triggerable heap corruption at do_getpass()
17878 to protect ourselves from mistakes in the future. Fixes bug
17879 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
17882 o Minor bugfixes (hidden service):
17883 - Allow hidden services to run on IPv6 addresses even when the
17884 IPv6Exit option is not set. Fixes bug 18357; bugfix
17888 - Add module-level internal documentation for 36 C files that
17889 previously didn't have a high-level overview. Closes ticket #20385.
17891 o Required libraries:
17892 - When building with OpenSSL, Tor now requires version 1.0.1 or
17893 later. OpenSSL 1.0.0 and earlier are no longer supported by the
17894 OpenSSL team, and should not be used. Closes ticket 20303.
17897 Changes in version 0.2.9.3-alpha - 2016-09-23
17898 Tor 0.2.9.3-alpha adds improved support for entities that want to make
17899 high-performance services available through the Tor .onion mechanism
17900 without themselves receiving anonymity as they host those services. It
17901 also tries harder to ensure that all steps on a circuit are using the
17902 strongest crypto possible, strengthens some TLS properties, and
17903 resolves several bugs -- including a pair of crash bugs from the 0.2.8
17904 series. Anybody running an earlier version of 0.2.9.x should upgrade.
17906 o Major bugfixes (crash, also in 0.2.8.8):
17907 - Fix a complicated crash bug that could affect Tor clients
17908 configured to use bridges when replacing a networkstatus consensus
17909 in which one of their bridges was mentioned. OpenBSD users saw
17910 more crashes here, but all platforms were potentially affected.
17911 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17913 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
17914 - Fix a timing-dependent assertion failure that could occur when we
17915 tried to flush from a circuit after having freed its cells because
17916 of an out-of-memory condition. Fixes bug 20203; bugfix on
17917 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17920 o Major features (circuit building, security):
17921 - Authorities, relays and clients now require ntor keys in all
17922 descriptors, for all hops (except for rare hidden service protocol
17923 cases), for all circuits, and for all other roles. Part of
17925 - Tor authorities, relays, and clients only use ntor, except for
17926 rare cases in the hidden service protocol. Part of ticket 19163.
17928 o Major features (single-hop "hidden" services):
17929 - Add experimental HiddenServiceSingleHopMode and
17930 HiddenServiceNonAnonymousMode options. When both are set to 1,
17931 every hidden service on a Tor instance becomes a non-anonymous
17932 Single Onion Service. Single Onions make one-hop (direct)
17933 connections to their introduction and rendezvous points. One-hop
17934 circuits make Single Onion servers easily locatable, but clients
17935 remain location-anonymous. This is compatible with the existing
17936 hidden service implementation, and works on the current tor
17937 network without any changes to older relays or clients. Implements
17938 proposal 260, completes ticket 17178. Patch by teor and asn.
17940 o Major features (resource management):
17941 - Tor can now notice it is about to run out of sockets, and
17942 preemptively close connections of lower priority. (This feature is
17943 off by default for now, since the current prioritizing method is
17944 yet not mature enough. You can enable it by setting
17945 "DisableOOSCheck 0", but watch out: it might close some sockets
17946 you would rather have it keep.) Closes ticket 18640.
17948 o Major bugfixes (circuit building):
17949 - Hidden service client-to-intro-point and service-to-rendezvous-
17950 point circuits use the TAP key supplied by the protocol, to avoid
17951 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
17953 o Major bugfixes (compilation, OpenBSD):
17954 - Fix a Libevent-detection bug in our autoconf script that would
17955 prevent Tor from linking successfully on OpenBSD. Patch from
17956 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
17958 o Major bugfixes (hidden services):
17959 - Clients now require hidden services to include the TAP keys for
17960 their intro points in the hidden service descriptor. This prevents
17961 an inadvertent upgrade to ntor, which a malicious hidden service
17962 could use to distinguish clients by consensus version. Fixes bug
17963 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
17965 o Minor features (security, TLS):
17966 - Servers no longer support clients that without AES ciphersuites.
17967 (3DES is no longer considered an acceptable cipher.) We believe
17968 that no such Tor clients currently exist, since Tor has required
17969 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
17971 o Minor feature (fallback directories):
17972 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17973 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17974 2016. Closes ticket 20190; patch by teor.
17976 o Minor features (geoip, also in 0.2.8.8):
17977 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17980 o Minor feature (port flags):
17981 - Add new flags to the *Port options to finer control over which
17982 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
17983 and the synthetic flag OnionTrafficOnly, which is equivalent to
17984 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
17985 18693; patch by "teor".
17987 o Minor features (directory authority):
17988 - After voting, if the authorities decide that a relay is not
17989 "Valid", they no longer include it in the consensus at all. Closes
17990 ticket 20002; implements part of proposal 272.
17992 o Minor features (testing):
17993 - Disable memory protections on OpenBSD when performing our unit
17994 tests for memwipe(). The test deliberately invokes undefined
17995 behavior, and the OpenBSD protections interfere with this. Patch
17996 from "rubiate". Closes ticket 20066.
17998 o Minor features (testing, ipv6):
17999 - Add the single-onion and single-onion-ipv6 chutney targets to
18000 "make test-network-all". This requires a recent chutney version
18001 with the single onion network flavours (git c72a652 or later).
18002 Closes ticket 20072; patch by teor.
18003 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
18004 tests. Remove bridges+hs, as it's somewhat redundant. This
18005 requires a recent chutney version that supports IPv6 clients,
18006 relays, and authorities. Closes ticket 20069; patch by teor.
18008 o Minor features (Tor2web):
18009 - Make Tor2web clients respect ReachableAddresses. This feature was
18010 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
18011 0.2.8.7. Implements feature 20034. Patch by teor.
18013 o Minor features (unit tests):
18014 - We've done significant work to make the unit tests run faster.
18015 - Our link-handshake unit tests now check that when invalid
18016 handshakes fail, they fail with the error messages we expected.
18017 - Our unit testing code that captures log messages no longer
18018 prevents them from being written out if the user asked for them
18019 (by passing --debug or --info or or --notice --warn to the "test"
18020 binary). This change prevents us from missing unexpected log
18021 messages simply because we were looking for others. Related to
18023 - The unit tests now log all warning messages with the "BUG" flag.
18024 Previously, they only logged errors by default. This change will
18025 help us make our testing code more correct, and make sure that we
18026 only hit this code when we mean to. In the meantime, however,
18027 there will be more warnings in the unit test logs than before.
18028 This is preparatory work for ticket 19999.
18029 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
18030 assertion as a test failure.
18032 o Minor bug fixes (circuits):
18033 - Use the CircuitBuildTimeout option whenever
18034 LearnCircuitBuildTimeout is disabled. Previously, we would respect
18035 the option when a user disabled it, but not when it was disabled
18036 because some other option was set. Fixes bug 20073; bugfix on
18037 0.2.4.12-alpha. Patch by teor.
18039 o Minor bugfixes (allocation):
18040 - Change how we allocate memory for large chunks on buffers, to
18041 avoid a (currently impossible) integer overflow, and to waste less
18042 space when allocating unusually large chunks. Fixes bug 20081;
18043 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
18044 - Always include orconfig.h before including any other C headers.
18045 Sometimes, it includes macros that affect the behavior of the
18046 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
18047 first version to use AC_USE_SYSTEM_EXTENSIONS).
18048 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
18049 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
18050 Patch from Gisle Vanem.
18051 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
18052 They apparently require a set of annotations that we aren't
18053 currently using, and they create false positives in our pthreads
18054 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
18056 o Minor bugfixes (directory authority):
18057 - Die with a more useful error when the operator forgets to place
18058 the authority_signing_key file into the keys directory. This
18059 avoids an uninformative assert & traceback about having an invalid
18060 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
18061 - When allowing private addresses, mark Exits that only exit to
18062 private locations as such. Fixes bug 20064; bugfix
18065 o Minor bugfixes (documentation):
18066 - Document the default PathsNeededToBuildCircuits value that's used
18067 by clients when the directory authorities don't set
18068 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
18069 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
18070 - Fix manual for the User option: it takes a username, not a UID.
18071 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
18074 o Minor bugfixes (hidden services):
18075 - Stop logging intro point details to the client log on certain
18076 error conditions. Fixed as part of bug 20012; bugfix on
18077 0.2.4.8-alpha. Patch by teor.
18079 o Minor bugfixes (IPv6, testing):
18080 - Check for IPv6 correctly on Linux when running test networks.
18081 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
18083 o Minor bugfixes (Linux seccomp2 sandbox):
18084 - Add permission to run the sched_yield() and sigaltstack() system
18085 calls, in order to support versions of Tor compiled with asan or
18086 ubsan code that use these calls. Now "sandbox 1" and
18087 "--enable-expensive-hardening" should be compatible on more
18088 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
18090 o Minor bugfixes (logging):
18091 - When logging a message from the BUG() macro, be explicit about
18092 what we were asserting. Previously we were confusing what we were
18093 asserting with what the bug was. Fixes bug 20093; bugfix
18095 - When we are unable to remove the bw_accounting file, do not warn
18096 if the reason we couldn't remove it was that it didn't exist.
18097 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
18099 o Minor bugfixes (option parsing):
18100 - Count unix sockets when counting client listeners (SOCKS, Trans,
18101 NATD, and DNS). This has no user-visible behaviour changes: these
18102 options are set once, and never read. Required for correct
18103 behaviour in ticket 17178. Fixes bug 19677; bugfix on
18104 0.2.6.3-alpha. Patch by teor.
18106 o Minor bugfixes (options):
18107 - Check the consistency of UseEntryGuards and EntryNodes more
18108 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
18110 - Stop changing the configured value of UseEntryGuards on
18111 authorities and Tor2web clients. Fixes bug 20074; bugfix on
18112 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
18115 o Minor bugfixes (Tor2web):
18116 - Prevent Tor2web clients running hidden services, these services
18117 are not anonymous due to the one-hop client paths. Fixes bug
18118 19678. Patch by teor.
18120 o Minor bugfixes (unit tests):
18121 - Fix a shared-random unit test that was failing on big endian
18122 architectures due to internal representation of a integer copied
18123 to a buffer. The test is changed to take a full 32 bytes of data
18124 and use the output of a python script that make the COMMIT and
18125 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
18127 - The tor_tls_server_info_callback unit test no longer crashes when
18128 debug-level logging is turned on. Fixes bug 20041; bugfix
18132 Changes in version 0.2.8.8 - 2016-09-23
18133 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
18134 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
18135 who select public relays as their bridges.
18137 o Major bugfixes (crash):
18138 - Fix a complicated crash bug that could affect Tor clients
18139 configured to use bridges when replacing a networkstatus consensus
18140 in which one of their bridges was mentioned. OpenBSD users saw
18141 more crashes here, but all platforms were potentially affected.
18142 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
18144 o Major bugfixes (relay, OOM handler):
18145 - Fix a timing-dependent assertion failure that could occur when we
18146 tried to flush from a circuit after having freed its cells because
18147 of an out-of-memory condition. Fixes bug 20203; bugfix on
18148 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
18151 o Minor feature (fallback directories):
18152 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
18153 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
18154 2016. Closes ticket 20190; patch by teor.
18156 o Minor features (geoip):
18157 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
18161 Changes in version 0.2.9.2-alpha - 2016-08-24
18162 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
18163 several new features and bugfixes. It also includes an important
18164 authority update and an important bugfix from 0.2.8.7. Everyone who
18165 sets the ReachableAddresses option, and all bridges, are strongly
18166 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
18168 o Directory authority changes (also in 0.2.8.7):
18169 - The "Tonga" bridge authority has been retired; the new bridge
18170 authority is "Bifroest". Closes tickets 19728 and 19690.
18172 o Major bugfixes (client, security, also in 0.2.8.7):
18173 - Only use the ReachableAddresses option to restrict the first hop
18174 in a path. In earlier versions of 0.2.8.x, it would apply to
18175 every hop in the path, with a possible degradation in anonymity
18176 for anyone using an uncommon ReachableAddress setting. Fixes bug
18177 19973; bugfix on 0.2.8.2-alpha.
18179 o Major features (user interface):
18180 - Tor now supports the ability to declare options deprecated, so
18181 that we can recommend that people stop using them. Previously,
18182 this was done in an ad-hoc way. Closes ticket 19820.
18184 o Major bugfixes (directory downloads):
18185 - Avoid resetting download status for consensuses hourly, since we
18186 already have another, smarter retry mechanism. Fixes bug 8625;
18187 bugfix on 0.2.0.9-alpha.
18189 o Minor features (config):
18190 - Warn users when descriptor and port addresses are inconsistent.
18191 Mitigates bug 13953; patch by teor.
18193 o Minor features (geoip):
18194 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18197 o Minor features (user interface):
18198 - There is a new --list-deprecated-options command-line option to
18199 list all of the deprecated options. Implemented as part of
18202 o Minor bugfixes (code style):
18203 - Fix an integer signedness conversion issue in the case conversion
18204 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
18206 o Minor bugfixes (compilation):
18207 - Build correctly on versions of libevent2 without support for
18208 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
18210 - Fix a compilation warning on GCC versions before 4.6. Our
18211 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
18212 when it is also required as an argument to the compiler pragma.
18213 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
18215 o Minor bugfixes (compilation, also in 0.2.8.7):
18216 - Remove an inappropriate "inline" in tortls.c that was causing
18217 warnings on older versions of GCC. Fixes bug 19903; bugfix
18220 o Minor bugfixes (fallback directories, also in 0.2.8.7):
18221 - Avoid logging a NULL string pointer when loading fallback
18222 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18223 and 0.2.8.1-alpha. Report and patch by "rubiate".
18225 o Minor bugfixes (logging):
18226 - Log a more accurate message when we fail to dump a microdescriptor.
18227 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
18229 o Minor bugfixes (memory leak):
18230 - Fix a series of slow memory leaks related to parsing torrc files
18231 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
18233 o Deprecated features:
18234 - A number of DNS-cache-related sub-options for client ports are now
18235 deprecated for security reasons, and may be removed in a future
18236 version of Tor. (We believe that client-side DNS caching is a bad
18237 idea for anonymity, and you should not turn it on.) The options
18238 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18239 UseIPv4Cache, and UseIPv6Cache.
18240 - A number of options are deprecated for security reasons, and may
18241 be removed in a future version of Tor. The options are:
18242 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18243 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18244 CloseHSClientCircuitsImmediatelyOnTimeout,
18245 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18246 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18247 UseNTorHandshake, and WarnUnsafeSocks.
18248 - The *ListenAddress options are now deprecated as unnecessary: the
18249 corresponding *Port options should be used instead. These options
18250 may someday be removed. The affected options are:
18251 ControlListenAddress, DNSListenAddress, DirListenAddress,
18252 NATDListenAddress, ORListenAddress, SocksListenAddress,
18253 and TransListenAddress.
18256 - Correct the IPv6 syntax in our documentation for the
18257 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18260 - We no longer include the (dead, deprecated) bufferevent code in
18261 Tor. Closes ticket 19450. Based on a patch from U+039b.
18264 Changes in version 0.2.8.7 - 2016-08-24
18265 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18266 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18267 who sets the ReachableAddresses option, and all bridges, are strongly
18268 encouraged to upgrade.
18270 o Directory authority changes:
18271 - The "Tonga" bridge authority has been retired; the new bridge
18272 authority is "Bifroest". Closes tickets 19728 and 19690.
18274 o Major bugfixes (client, security):
18275 - Only use the ReachableAddresses option to restrict the first hop
18276 in a path. In earlier versions of 0.2.8.x, it would apply to
18277 every hop in the path, with a possible degradation in anonymity
18278 for anyone using an uncommon ReachableAddress setting. Fixes bug
18279 19973; bugfix on 0.2.8.2-alpha.
18281 o Minor features (geoip):
18282 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18285 o Minor bugfixes (compilation):
18286 - Remove an inappropriate "inline" in tortls.c that was causing
18287 warnings on older versions of GCC. Fixes bug 19903; bugfix
18290 o Minor bugfixes (fallback directories):
18291 - Avoid logging a NULL string pointer when loading fallback
18292 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18293 and 0.2.8.1-alpha. Report and patch by "rubiate".
18296 Changes in version 0.2.9.1-alpha - 2016-08-08
18297 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18298 series. It improves our support for hardened builds and compiler
18299 warnings, deploys some critical infrastructure for improvements to
18300 hidden services, includes a new timing backend that we hope to use for
18301 better support for traffic padding, makes it easier for programmers to
18302 log unexpected events, and contains other small improvements to
18303 security, correctness, and performance.
18305 Below are the changes since 0.2.8.6.
18307 o New system requirements:
18308 - Tor now requires Libevent version 2.0.10-stable or later. Older
18309 versions of Libevent have less efficient backends for several
18310 platforms, and lack the DNS code that we use for our server-side
18311 DNS support. This implements ticket 19554.
18312 - Tor now requires zlib version 1.2 or later, for security,
18313 efficiency, and (eventually) gzip support. (Back when we started,
18314 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18315 released in 2003. We recommend the latest version.)
18317 o Major features (build, hardening):
18318 - Tor now builds with -ftrapv by default on compilers that support
18319 it. This option detects signed integer overflow (which C forbids),
18320 and turns it into a hard-failure. We do not apply this option to
18321 code that needs to run in constant time to avoid side-channels;
18322 instead, we use -fwrapv in that code. Closes ticket 17983.
18323 - When --enable-expensive-hardening is selected, stop applying the
18324 clang/gcc sanitizers to code that needs to run in constant time.
18325 Although we are aware of no introduced side-channels, we are not
18326 able to prove that there are none. Related to ticket 17983.
18328 o Major features (compilation):
18329 - Our big list of extra GCC warnings is now enabled by default when
18330 building with GCC (or with anything like Clang that claims to be
18331 GCC-compatible). To make all warnings into fatal compilation
18332 errors, pass --enable-fatal-warnings to configure. Closes
18334 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18335 turn on C and POSIX extensions. (Previously, we attempted to do
18336 this on an ad hoc basis.) Closes ticket 19139.
18338 o Major features (directory authorities, hidden services):
18339 - Directory authorities can now perform the shared randomness
18340 protocol specified by proposal 250. Using this protocol, directory
18341 authorities generate a global fresh random value every day. In the
18342 future, this value will be used by hidden services to select
18343 HSDirs. This release implements the directory authority feature;
18344 the hidden service side will be implemented in the future as part
18345 of proposal 224. Resolves ticket 16943; implements proposal 250.
18347 o Major features (downloading, random exponential backoff):
18348 - When we fail to download an object from a directory service, wait
18349 for an (exponentially increasing) randomized amount of time before
18350 retrying, rather than a fixed interval as we did before. This
18351 prevents a group of Tor instances from becoming too synchronized,
18352 or a single Tor instance from becoming too predictable, in its
18353 download schedule. Closes ticket 15942.
18355 o Major bugfixes (exit policies):
18356 - Avoid disclosing exit outbound bind addresses, configured port
18357 bind addresses, and local interface addresses in relay descriptors
18358 by default under ExitPolicyRejectPrivate. Instead, only reject
18359 these (otherwise unlisted) addresses if
18360 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18361 0.2.7.2-alpha. Patch by teor.
18363 o Major bugfixes (hidden service client):
18364 - Allow Tor clients with appropriate controllers to work with
18365 FetchHidServDescriptors set to 0. Previously, this option also
18366 disabled descriptor cache lookup, thus breaking hidden services
18367 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18369 o Minor features (build, hardening):
18370 - Detect and work around a libclang_rt problem that would prevent
18371 clang from finding __mulodi4() on some 32-bit platforms, and thus
18372 keep -ftrapv from linking on those systems. Closes ticket 19079.
18373 - When building on a system without runtime support for the runtime
18374 hardening options, try to log a useful warning at configuration
18375 time, rather than an incomprehensible warning at link time. If
18376 expensive hardening was requested, this warning becomes an error.
18377 Closes ticket 18895.
18379 o Minor features (code safety):
18380 - In our integer-parsing functions, ensure that maxiumum value we
18381 give is no smaller than the minimum value. Closes ticket 19063;
18384 o Minor features (controller):
18385 - Implement new GETINFO queries for all downloads that use
18386 download_status_t to schedule retries. This allows controllers to
18387 examine the schedule for pending downloads. Closes ticket 19323.
18388 - Allow controllers to configure basic client authorization on
18389 hidden services when they create them with the ADD_ONION control
18390 command. Implements ticket 15588. Patch by "special".
18391 - Fire a STATUS_SERVER controller event whenever the hibernation
18392 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18394 o Minor features (directory authority):
18395 - Directory authorities now only give the Guard flag to a relay if
18396 they are also giving it the Stable flag. This change allows us to
18397 simplify path selection for clients. It should have minimal effect
18398 in practice, since >99% of Guards already have the Stable flag.
18399 Implements ticket 18624.
18400 - Directory authorities now write their v3-status-votes file out to
18401 disk earlier in the consensus process, so we have a record of the
18402 votes even if we abort the consensus process. Resolves
18405 o Minor features (hidden service):
18406 - Stop being so strict about the payload length of "rendezvous1"
18407 cells. We used to be locked in to the "TAP" handshake length, and
18408 now we can handle better handshakes like "ntor". Resolves
18411 o Minor features (infrastructure, time):
18412 - Tor now uses the operating system's monotonic timers (where
18413 available) for internal fine-grained timing. Previously we would
18414 look at the system clock, and then attempt to compensate for the
18415 clock running backwards. Closes ticket 18908.
18416 - Tor now includes an improved timer backend, so that we can
18417 efficiently support tens or hundreds of thousands of concurrent
18418 timers, as will be needed for some of our planned anti-traffic-
18419 analysis work. This code is based on William Ahern's "timeout.c"
18420 project, which implements a "tickless hierarchical timing wheel".
18421 Closes ticket 18365.
18423 o Minor features (logging):
18424 - Provide a more useful warning message when configured with an
18425 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18426 - When dumping unparseable router descriptors, optionally store them
18427 in separate files, named by digest, up to a configurable size
18428 limit. You can change the size limit by setting the
18429 MaxUnparseableDescSizeToLog option, and disable this feature by
18430 setting that option to 0. Closes ticket 18322.
18431 - Add a set of macros to check nonfatal assertions, for internal
18432 use. Migrating more of our checks to these should help us avoid
18433 needless crash bugs. Closes ticket 18613.
18435 o Minor features (performance):
18436 - Change the "optimistic data" extension from "off by default" to
18437 "on by default". The default was ordinarily overridden by a
18438 consensus option, but when clients were bootstrapping for the
18439 first time, they would not have a consensus to get the option
18440 from. Changing this default saves a round-trip during startup.
18441 Closes ticket 18815.
18443 o Minor features (relay, usability):
18444 - When the directory authorities refuse a bad relay's descriptor,
18445 encourage the relay operator to contact us. Many relay operators
18446 won't notice this line in their logs, but it's a win if even a few
18447 learn why we don't like what their relay was doing. Resolves
18450 o Minor features (testing):
18451 - Let backtrace tests work correctly under AddressSanitizer. Fixes
18452 part of bug 18934; bugfix on 0.2.5.2-alpha.
18453 - Move the test-network.sh script to chutney, and modify tor's test-
18454 network.sh to call the (newer) chutney version when available.
18455 Resolves ticket 19116. Patch by teor.
18456 - Use the lcov convention for marking lines as unreachable, so that
18457 we don't count them when we're generating test coverage data.
18458 Update our coverage tools to understand this convention. Closes
18461 o Minor bugfixes (bootstrap):
18462 - Remember the directory we fetched the consensus or previous
18463 certificates from, and use it to fetch future authority
18464 certificates. This change improves bootstrapping performance.
18465 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
18467 o Minor bugfixes (build):
18468 - The test-stem and test-network makefile targets now depend only on
18469 the tor binary that they are testing. Previously, they depended on
18470 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
18471 patch from "cypherpunks".
18473 o Minor bugfixes (circuits):
18474 - Make sure extend_info_from_router() is only called on servers.
18475 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
18477 o Minor bugfixes (compilation):
18478 - When building with Clang, use a full set of GCC warnings.
18479 (Previously, we included only a subset, because of the way we
18480 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
18482 o Minor bugfixes (directory authority):
18483 - Authorities now sort the "package" lines in their votes, for ease
18484 of debugging. (They are already sorted in consensus documents.)
18485 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
18486 - When parsing a detached signature, make sure we use the length of
18487 the digest algorithm instead of an hardcoded DIGEST256_LEN in
18488 order to avoid comparing bytes out-of-bounds with a smaller digest
18489 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
18491 o Minor bugfixes (documentation):
18492 - Document the --passphrase-fd option in the tor manpage. Fixes bug
18493 19504; bugfix on 0.2.7.3-rc.
18494 - Fix the description of the --passphrase-fd option in the
18495 tor-gencert manpage. The option is used to pass the number of a
18496 file descriptor to read the passphrase from, not to read the file
18497 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
18499 o Minor bugfixes (ephemeral hidden service):
18500 - When deleting an ephemeral hidden service, close its intro points
18501 even if they are not completely open. Fixes bug 18604; bugfix
18504 o Minor bugfixes (guard selection):
18505 - Use a single entry guard even if the NumEntryGuards consensus
18506 parameter is not provided. Fixes bug 17688; bugfix
18508 - Don't mark guards as unreachable if connection_connect() fails.
18509 That function fails for local reasons, so it shouldn't reveal
18510 anything about the status of the guard. Fixes bug 14334; bugfix
18513 o Minor bugfixes (hidden service client):
18514 - Increase the minimum number of internal circuits we preemptively
18515 build from 2 to 3, so a circuit is available when a client
18516 connects to another onion service. Fixes bug 13239; bugfix
18519 o Minor bugfixes (logging):
18520 - When logging a directory ownership mismatch, log the owning
18521 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
18523 o Minor bugfixes (memory leaks):
18524 - Fix a small, uncommon memory leak that could occur when reading a
18525 truncated ed25519 key file. Fixes bug 18956; bugfix
18528 o Minor bugfixes (testing):
18529 - Allow clients to retry HSDirs much faster in test networks. Fixes
18530 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
18531 - Disable ASAN's detection of segmentation faults while running
18532 test_bt.sh, so that we can make sure that our own backtrace
18533 generation code works. Fixes another aspect of bug 18934; bugfix
18534 on 0.2.5.2-alpha. Patch from "cypherpunks".
18535 - Fix the test-network-all target on out-of-tree builds by using the
18536 correct path to the test driver script. Fixes bug 19421; bugfix
18539 o Minor bugfixes (time):
18540 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
18541 bugfix on all released tor versions.
18542 - When computing the difference between two times in milliseconds,
18543 we now round to the nearest millisecond correctly. Previously, we
18544 could sometimes round in the wrong direction. Fixes bug 19428;
18545 bugfix on 0.2.2.2-alpha.
18547 o Minor bugfixes (user interface):
18548 - Display a more accurate number of suppressed messages in the log
18549 rate-limiter. Previously, there was a potential integer overflow
18550 in the counter. Now, if the number of messages hits a maximum, the
18551 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
18553 - Fix a typo in the passphrase prompt for the ed25519 identity key.
18554 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
18556 o Code simplification and refactoring:
18557 - Remove redundant declarations of the MIN macro. Closes
18559 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
18560 Closes ticket 18462; patch from "icanhasaccount".
18561 - Split the 600-line directory_handle_command_get function into
18562 separate functions for different URL types. Closes ticket 16698.
18565 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18566 ticket 19153. Patch from "U+039b".
18568 o Removed features:
18569 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18570 "GETINFO dir-usage" controller request, which were only available
18571 via a compile-time option in Tor anyway. Feature was added in
18572 0.2.2.1-alpha. Resolves ticket 19035.
18573 - There is no longer a compile-time option to disable support for
18574 TransPort. (If you don't want TransPort; just don't use it.) Patch
18575 from "U+039b". Closes ticket 19449.
18578 - Run more workqueue tests as part of "make check". These had
18579 previously been implemented, but you needed to know special
18580 command-line options to enable them.
18581 - We now have unit tests for our code to reject zlib "compression
18582 bombs". (Fortunately, the code works fine.)
18585 Changes in version 0.2.8.6 - 2016-08-02
18587 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
18589 The Tor 0.2.8 series improves client bootstrapping performance,
18590 completes the authority-side implementation of improved identity
18591 keys for relays, and includes numerous bugfixes and performance
18592 improvements throughout the program. This release continues to
18593 improve the coverage of Tor's test suite. For a full list of
18594 changes since Tor 0.2.7, see the ReleaseNotes file.
18596 Changes since 0.2.8.5-rc:
18598 o Minor features (geoip):
18599 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
18602 o Minor bugfixes (compilation):
18603 - Fix a compilation warning in the unit tests on systems where char
18604 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
18606 o Minor bugfixes (fallback directories):
18607 - Remove 1 fallback that was on the hardcoded list, then opted-out,
18608 leaving 89 of the 100 fallbacks originally introduced in Tor
18609 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
18611 o Minor bugfixes (Linux seccomp2 sandbox):
18612 - Allow more syscalls when running with "Sandbox 1" enabled:
18613 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
18614 some systems, these are required for Tor to start. Fixes bug
18615 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
18616 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
18617 so that get_interface_address6_via_udp_socket_hack() can work.
18618 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
18621 Changes in version 0.2.8.5-rc - 2016-07-07
18622 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
18623 series. If we find no new bugs or regressions here, the first stable
18624 0.2.8 release will be identical to it. It has a few small bugfixes
18625 against previous versions.
18627 o Directory authority changes:
18628 - Urras is no longer a directory authority. Closes ticket 19271.
18630 o Major bugfixes (heartbeat):
18631 - Fix a regression that would crash Tor when the periodic
18632 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
18633 0.2.8.1-alpha. Reported by "kubaku".
18635 o Minor features (build):
18636 - Tor now again builds with the recent OpenSSL 1.1 development
18637 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
18638 - When building manual pages, set the timezone to "UTC", so that the
18639 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
18640 Patch from intrigeri.
18642 o Minor bugfixes (fallback directory selection):
18643 - Avoid errors during fallback selection if there are no eligible
18644 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
18647 o Minor bugfixes (IPv6, microdescriptors):
18648 - Don't check node addresses when we only have a routerstatus. This
18649 allows IPv6-only clients to bootstrap by fetching microdescriptors
18650 from fallback directory mirrors. (The microdescriptor consensus
18651 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
18654 o Minor bugfixes (logging):
18655 - Reduce pointlessly verbose log messages when directory servers
18656 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
18657 0.2.8.1-alpha. Patch by teor.
18658 - When a fallback directory changes its fingerprint from the hard-
18659 coded fingerprint, log a less severe, more explanatory log
18660 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
18662 o Minor bugfixes (Linux seccomp2 sandboxing):
18663 - Allow statistics to be written to disk when "Sandbox 1" is
18664 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
18665 0.2.6.1-alpha respectively.
18667 o Minor bugfixes (user interface):
18668 - Remove a warning message "Service [scrubbed] not found after
18669 descriptor upload". This message appears when one uses HSPOST
18670 control command to upload a service descriptor. Since there is
18671 only a descriptor and no service, showing this message is
18672 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
18674 o Fallback directory list:
18675 - Add a comment to the generated fallback directory list that
18676 explains how to comment out unsuitable fallbacks in a way that's
18677 compatible with the stem fallback parser.
18678 - Update fallback whitelist and blacklist based on relay operator
18679 emails. Blacklist unsuitable (non-working, over-volatile)
18680 fallbacks. Resolves ticket 19071. Patch by teor.
18681 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
18682 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
18683 ticket 19071; patch by teor.
18686 Changes in version 0.2.8.4-rc - 2016-06-15
18687 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
18688 If we find no new bugs or regressions here, the first stable 0.2.8
18689 release will be identical to it. It has a few small bugfixes against
18692 o Major bugfixes (user interface):
18693 - Correctly give a warning in the cases where a relay is specified
18694 by nickname, and one such relay is found, but it is not officially
18695 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
18697 o Minor features (build):
18698 - Tor now builds once again with the recent OpenSSL 1.1 development
18699 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
18701 o Minor features (geoip):
18702 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
18705 o Minor bugfixes (compilation):
18706 - Cause the unit tests to compile correctly on mingw64 versions that
18707 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
18709 o Minor bugfixes (downloading):
18710 - Predict more correctly whether we'll be downloading over HTTP when
18711 we determine the maximum length of a URL. This should avoid a
18712 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
18716 Changes in version 0.2.8.3-alpha - 2016-05-26
18717 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
18718 the course of the 0.2.8 development cycle. It improves the behavior of
18719 directory clients, fixes several crash bugs, fixes a gap in compiler
18720 hardening, and allows the full integration test suite to run on
18723 o Major bugfixes (security, client, DNS proxy):
18724 - Stop a crash that could occur when a client running with DNSPort
18725 received a query with multiple address types, and the first
18726 address type was not supported. Found and fixed by Scott Dial.
18727 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
18729 o Major bugfixes (security, compilation):
18730 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
18731 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
18732 cause a compiler warning, thereby making other checks fail, and
18733 needlessly disabling compiler-hardening support. Fixes one case of
18734 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
18736 o Major bugfixes (security, directory authorities):
18737 - Fix a crash and out-of-bounds write during authority voting, when
18738 the list of relays includes duplicate ed25519 identity keys. Fixes
18739 bug 19032; bugfix on 0.2.8.2-alpha.
18741 o Major bugfixes (client, bootstrapping):
18742 - Check if bootstrap consensus downloads are still needed when the
18743 linked connection attaches. This prevents tor making unnecessary
18744 begindir-style connections, which are the only directory
18745 connections tor clients make since the fix for 18483 was merged.
18746 - Fix some edge cases where consensus download connections may not
18747 have been closed, even though they were not needed. Related to fix
18749 - Make relays retry consensus downloads the correct number of times,
18750 rather than the more aggressive client retry count. Fixes part of
18752 - Stop downloading consensuses when we have a consensus, even if we
18753 don't have all the certificates for it yet. Fixes bug 18809;
18754 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
18756 o Major bugfixes (directory mirrors):
18757 - Decide whether to advertise begindir support in the the same way
18758 we decide whether to advertise our DirPort. Allowing these
18759 decisions to become out-of-sync led to surprising behavior like
18760 advertising begindir support when hibernation made us not
18761 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
18764 o Major bugfixes (IPv6 bridges, client):
18765 - Actually use IPv6 addresses when selecting directory addresses for
18766 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
18769 o Major bugfixes (key management):
18770 - If OpenSSL fails to generate an RSA key, do not retain a dangling
18771 pointer to the previous (uninitialized) key value. The impact here
18772 should be limited to a difficult-to-trigger crash, if OpenSSL is
18773 running an engine that makes key generation failures possible, or
18774 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
18775 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
18778 o Major bugfixes (testing):
18779 - Fix a bug that would block 'make test-network-all' on systems where
18780 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
18781 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
18782 bugfix on 0.2.8.1-alpha.
18784 o Minor features (clients):
18785 - Make clients, onion services, and bridge relays always use an
18786 encrypted begindir connection for directory requests. Resolves
18787 ticket 18483. Patch by "teor".
18789 o Minor features (fallback directory mirrors):
18790 - Give each fallback the same weight for client selection; restrict
18791 fallbacks to one per operator; report fallback directory detail
18792 changes when rebuilding list; add new fallback directory mirrors
18793 to the whitelist; and many other minor simplifications and fixes.
18794 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
18795 0.2.8.1-alpha; patch by "teor".
18796 - Replace the 21 fallbacks generated in January 2016 and included in
18797 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
18798 2016. Closes task 17158; patch by "teor".
18800 o Minor features (geoip):
18801 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
18804 o Minor bugfixes (assert, portability):
18805 - Fix an assertion failure in memarea.c on systems where "long" is
18806 shorter than the size of a pointer. Fixes bug 18716; bugfix
18809 o Minor bugfixes (bootstrap):
18810 - Consistently use the consensus download schedule for authority
18811 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
18813 o Minor bugfixes (build):
18814 - Remove a pair of redundant AM_CONDITIONAL declarations from
18815 configure.ac. Fixes one final case of bug 17744; bugfix
18817 - Resolve warnings when building on systems that are concerned with
18818 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
18820 - When libscrypt.h is found, but no libscrypt library can be linked,
18821 treat libscrypt as absent. Fixes bug 19161; bugfix
18824 o Minor bugfixes (client):
18825 - Turn all TestingClientBootstrap* into non-testing torrc options.
18826 This changes simply renames them by removing "Testing" in front of
18827 them and they do not require TestingTorNetwork to be enabled
18828 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
18829 - Make directory node selection more reliable, mainly for IPv6-only
18830 clients and clients with few reachable addresses. Fixes bug 18929;
18831 bugfix on 0.2.8.1-alpha. Patch by "teor".
18833 o Minor bugfixes (controller, microdescriptors):
18834 - Make GETINFO dir/status-vote/current/consensus conform to the
18835 control specification by returning "551 Could not open cached
18836 consensus..." when not caching consensuses. Fixes bug 18920;
18837 bugfix on 0.2.2.6-alpha.
18839 o Minor bugfixes (crypto, portability):
18840 - The SHA3 and SHAKE routines now produce the correct output on Big
18841 Endian systems. No code calls either algorithm yet, so this is
18842 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
18843 - Tor now builds again with the recent OpenSSL 1.1 development
18844 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
18847 o Minor bugfixes (directories):
18848 - When fetching extrainfo documents, compare their SHA256 digests
18849 and Ed25519 signing key certificates with the routerinfo that led
18850 us to fetch them, rather than with the most recent routerinfo.
18851 Otherwise we generate many spurious warnings about mismatches.
18852 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
18854 o Minor bugfixes (logging):
18855 - When we can't generate a signing key because OfflineMasterKey is
18856 set, do not imply that we should have been able to load it. Fixes
18857 bug 18133; bugfix on 0.2.7.2-alpha.
18858 - Stop periodic_event_dispatch() from blasting twelve lines per
18859 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
18860 - When rejecting a misformed INTRODUCE2 cell, only log at
18861 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
18863 o Minor bugfixes (pluggable transports):
18864 - Avoid reporting a spurious error when we decide that we don't need
18865 to terminate a pluggable transport because it has already exited.
18866 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
18868 o Minor bugfixes (pointer arithmetic):
18869 - Fix a bug in memarea_alloc() that could have resulted in remote
18870 heap write access, if Tor had ever passed an unchecked size to
18871 memarea_alloc(). Fortunately, all the sizes we pass to
18872 memarea_alloc() are pre-checked to be less than 128 kilobytes.
18873 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
18876 o Minor bugfixes (relays):
18877 - Consider more config options when relays decide whether to
18878 regenerate their descriptor. Fixes more of bug 12538; bugfix
18880 - Resolve some edge cases where we might launch an ORPort
18881 reachability check even when DisableNetwork is set. Noticed while
18882 fixing bug 18616; bugfix on 0.2.3.9-alpha.
18884 o Minor bugfixes (statistics):
18885 - We now include consensus downloads via IPv6 in our directory-
18886 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
18888 o Minor bugfixes (testing):
18889 - Allow directories in small networks to bootstrap by skipping
18890 DirPort checks when the consensus has no exits. Fixes bug 19003;
18891 bugfix on 0.2.8.1-alpha. Patch by teor.
18892 - Fix a small memory leak that would occur when the
18893 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
18894 bugfix on 0.2.5.2-alpha.
18896 o Minor bugfixes (time handling):
18897 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
18898 field. Otherwise, our unit tests crash on Windows. Fixes bug
18899 18977; bugfix on 0.2.2.25-alpha.
18902 - Document the contents of the 'datadir/keys' subdirectory in the
18903 manual page. Closes ticket 17621.
18904 - Stop recommending use of nicknames to identify relays in our
18905 MapAddress documentation. Closes ticket 18312.
18908 Changes in version 0.2.8.2-alpha - 2016-03-28
18909 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
18910 bugs in earlier versions of Tor, including some that prevented
18911 authorities using Tor 0.2.7.x from running correctly. IPv6 and
18912 directory support should also be much improved.
18914 o New system requirements:
18915 - Tor no longer supports versions of OpenSSL with a broken
18916 implementation of counter mode. (This bug was present in OpenSSL
18917 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
18918 longer runs with, these versions.
18919 - Tor no longer attempts to support platforms where the "time_t"
18920 type is unsigned. (To the best of our knowledge, only OpenVMS does
18921 this, and Tor has never actually built on OpenVMS.) Closes
18923 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
18924 later (released in 2008 and 2009 respectively). If you are
18925 building Tor from the git repository instead of from the source
18926 distribution, and your tools are older than this, you will need to
18927 upgrade. Closes ticket 17732.
18929 o Major bugfixes (security, pointers):
18930 - Avoid a difficult-to-trigger heap corruption attack when extending
18931 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
18932 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
18933 Reported by Guido Vranken.
18935 o Major bugfixes (bridges, pluggable transports):
18936 - Modify the check for OR connections to private addresses. Allow
18937 bridges on private addresses, including pluggable transports that
18938 ignore the (potentially private) address in the bridge line. Fixes
18939 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
18941 o Major bugfixes (compilation):
18942 - Repair hardened builds under the clang compiler. Previously, our
18943 use of _FORTIFY_SOURCE would conflict with clang's address
18944 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
18946 o Major bugfixes (crash on shutdown):
18947 - Correctly handle detaching circuits from muxes when shutting down.
18948 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
18949 - Fix an assert-on-exit bug related to counting memory usage in
18950 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
18952 o Major bugfixes (crash on startup):
18953 - Fix a segfault during startup: If a Unix domain socket was
18954 configured as listener (such as a ControlSocket or a SocksPort
18955 "unix:" socket), and tor was started as root but not configured to
18956 switch to another user, tor would segfault while trying to string
18957 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
18960 o Major bugfixes (dns proxy mode, crash):
18961 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
18962 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
18964 o Major bugfixes (relays, bridge clients):
18965 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
18966 bridge clients use the address configured in the bridge line.
18967 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
18970 o Major bugfixes (voting):
18971 - Actually enable support for authorities to match routers by their
18972 Ed25519 identities. Previously, the code had been written, but
18973 some debugging code that had accidentally been left in the
18974 codebase made it stay turned off. Fixes bug 17702; bugfix
18976 - When collating votes by Ed25519 identities, authorities now
18977 include a "NoEdConsensus" flag if the ed25519 value (or lack
18978 thereof) for a server does not reflect the majority consensus.
18979 Related to bug 17668; bugfix on 0.2.7.2-alpha.
18980 - When generating a vote with keypinning disabled, never include two
18981 entries for the same ed25519 identity. This bug was causing
18982 authorities to generate votes that they could not parse when a
18983 router violated key pinning by changing its RSA identity but
18984 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
18985 18318. Bugfix on 0.2.7.2-alpha.
18987 o Minor features (security, win32):
18988 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
18989 attack. Fixes bug 18123; bugfix on all tor versions. Patch
18992 o Minor features (bug-resistance):
18993 - Make Tor survive errors involving connections without a
18994 corresponding event object. Previously we'd fail with an
18995 assertion; now we produce a log message. Related to bug 16248.
18997 o Minor features (build):
18998 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
18999 as having possible IPFW support. Closes ticket 18448. Patch from
19000 Steven Chamberlain.
19002 o Minor features (code hardening):
19003 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
19004 level code, to harden against accidental failures to NUL-
19005 terminate. Part of ticket 17852. Patch from jsturgix. Found
19008 o Minor features (crypto):
19009 - Validate the hard-coded Diffie-Hellman parameters and ensure that
19010 p is a safe prime, and g is a suitable generator. Closes
19013 o Minor features (geoip):
19014 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
19017 o Minor features (hidden service directory):
19018 - Streamline relay-side hsdir handling: when relays consider whether
19019 to accept an uploaded hidden service descriptor, they no longer
19020 check whether they are one of the relays in the network that is
19021 "supposed" to handle that descriptor. Implements ticket 18332.
19023 o Minor features (IPv6):
19024 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
19025 to 1, tor prefers IPv6 directory addresses.
19026 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
19027 avoids using IPv4 for client OR and directory connections.
19028 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
19029 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
19030 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
19032 o Minor features (linux seccomp2 sandbox):
19033 - Reject attempts to change our Address with "Sandbox 1" enabled.
19034 Changing Address with Sandbox turned on would never actually work,
19035 but previously it would fail in strange and confusing ways. Found
19036 while fixing 18548.
19038 o Minor features (robustness):
19039 - Exit immediately with an error message if the code attempts to use
19040 Libevent without having initialized it. This should resolve some
19041 frequently-made mistakes in our unit tests. Closes ticket 18241.
19043 o Minor features (unix domain sockets):
19044 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
19045 Unix domain sockets without checking the permissions on the parent
19046 directory. (Tor checks permissions by default because some
19047 operating systems only check permissions on the parent directory.
19048 However, some operating systems do look at permissions on the
19049 socket, and tor's default check is unneeded.) Closes ticket 18458.
19052 o Minor bugfixes (exit policies, security):
19053 - Refresh an exit relay's exit policy when interface addresses
19054 change. Previously, tor only refreshed the exit policy when the
19055 configured external address changed. Fixes bug 18208; bugfix on
19056 0.2.7.3-rc. Patch by teor.
19058 o Minor bugfixes (security, hidden services):
19059 - Prevent hidden services connecting to client-supplied rendezvous
19060 addresses that are reserved as internal or multicast. Fixes bug
19061 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
19063 o Minor bugfixes (build):
19064 - Do not link the unit tests against both the testing and non-
19065 testing versions of the static libraries. Fixes bug 18490; bugfix
19067 - Avoid spurious failures from configure files related to calling
19068 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
19069 0.2.0.1-alpha. Patch from "cypherpunks".
19070 - Silence spurious clang-scan warnings in the ed25519_donna code by
19071 explicitly initializing some objects. Fixes bug 18384; bugfix on
19072 0.2.7.2-alpha. Patch by teor.
19074 o Minor bugfixes (client, bootstrap):
19075 - Count receipt of new microdescriptors as progress towards
19076 bootstrapping. Previously, with EntryNodes set, Tor might not
19077 successfully repopulate the guard set on bootstrapping. Fixes bug
19078 16825; bugfix on 0.2.3.1-alpha.
19080 o Minor bugfixes (code correctness):
19081 - Update to the latest version of Trunnel, which tries harder to
19082 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
19083 by clang address sanitizer. Fixes bug 18373; bugfix
19086 o Minor bugfixes (configuration):
19087 - Fix a tiny memory leak when parsing a port configuration ending in
19088 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
19090 o Minor bugfixes (containers):
19091 - If we somehow attempt to construct a heap with more than
19092 1073741822 elements, avoid an integer overflow when maintaining
19093 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
19095 o Minor bugfixes (correctness):
19096 - Fix a bad memory handling bug that would occur if we had queued a
19097 cell on a channel's incoming queue. Fortunately, we can't actually
19098 queue a cell like that as our code is constructed today, but it's
19099 best to avoid this kind of error, even if there isn't any code
19100 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
19102 o Minor bugfixes (directory):
19103 - When generating a URL for a directory server on an IPv6 address,
19104 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
19105 on 0.2.3.9-alpha. Patch from Malek.
19107 o Minor bugfixes (fallback directory mirrors):
19108 - When requesting extrainfo descriptors from a trusted directory
19109 server, check whether it is an authority or a fallback directory
19110 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
19111 0.2.4.7-alpha. Reported by atagar, patch by teor.
19113 o Minor bugfixes (hidden service, client):
19114 - Handle the case where the user makes several fast consecutive
19115 requests to the same .onion address. Previously, the first six
19116 requests would each trigger a descriptor fetch, each picking a
19117 directory (there are 6 overall) and the seventh one would fail
19118 because no directories were left, thereby triggering a close on
19119 all current directory connections asking for the hidden service.
19120 The solution here is to not close the connections if we have
19121 pending directory fetches. Fixes bug 15937; bugfix
19124 o Minor bugfixes (hidden service, control port):
19125 - Add the onion address to the HS_DESC event for the UPLOADED action
19126 both on success or failure. It was previously hardcoded with
19127 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
19129 o Minor bugfixes (hidden service, directory):
19130 - Bridges now refuse "rendezvous2" (hidden service descriptor)
19131 publish attempts. Suggested by ticket 18332.
19133 o Minor bugfixes (linux seccomp2 sandbox):
19134 - Allow the setrlimit syscall, and the prlimit and prlimit64
19135 syscalls, which some libc implementations use under the hood.
19136 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
19137 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
19138 enabled and no DNS resolvers configured. This should help TAILS
19139 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
19140 - Fix the sandbox's interoperability with unix domain sockets under
19141 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
19143 o Minor bugfixes (logging):
19144 - When logging information about an unparsable networkstatus vote or
19145 consensus, do not say "vote" when we mean consensus. Fixes bug
19146 18368; bugfix on 0.2.0.8-alpha.
19147 - Scrub service name in "unrecognized service ID" log messages.
19148 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
19149 - Downgrade logs and backtraces about IP versions to info-level.
19150 Only log backtraces once each time tor runs. Assists in diagnosing
19151 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
19152 Christian, patch by teor.
19154 o Minor bugfixes (memory safety):
19155 - Avoid freeing an uninitialized pointer when opening a socket fails
19156 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
19157 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
19159 - Correctly duplicate addresses in get_interface_address6_list().
19160 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
19161 patch by "cypherpunks".
19162 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
19164 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
19165 18672; bugfix on 0.2.5.1-alpha.
19167 o Minor bugfixes (private directory):
19168 - Prevent a race condition when creating private directories. Fixes
19169 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
19170 Patch from jsturgix. Found with Flawfinder.
19172 o Minor bugfixes (test networks, IPv6):
19173 - Allow internal IPv6 addresses in descriptors in test networks.
19174 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
19177 o Minor bugfixes (testing):
19178 - We no longer disable assertions in the unit tests when coverage is
19179 enabled. Instead, we require you to say --disable-asserts-in-tests
19180 to the configure script if you need assertions disabled in the
19181 unit tests (for example, if you want to perform branch coverage).
19182 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
19184 o Minor bugfixes (time parsing):
19185 - Avoid overflow in tor_timegm when parsing dates in and after 2038
19186 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
19187 0.0.2pre14. Patch by teor.
19189 o Minor bugfixes (tor-gencert):
19190 - Correctly handle the case where an authority operator enters a
19191 passphrase but sends an EOF before sending a newline. Fixes bug
19192 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
19194 o Code simplification and refactoring:
19195 - Quote all the string interpolations in configure.ac -- even those
19196 which we are pretty sure can't contain spaces. Closes ticket
19197 17744. Patch from zerosion.
19198 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
19199 inplace, so there's no need to have a separate implementation for
19200 the non-inplace code. Closes ticket 18258. Patch from Malek.
19201 - Simplify return types for some crypto functions that can't
19202 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
19205 - Change build messages to refer to "Fedora" instead of "Fedora
19206 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
19207 Patches from "icanhasaccount" and "cypherpunks".
19209 o Removed features:
19210 - We no longer maintain an internal freelist in memarea.c.
19211 Allocators should be good enough to make this code unnecessary,
19212 and it's doubtful that it ever had any performance benefit.
19215 - Fix several warnings from clang's address sanitizer produced in
19217 - Treat backtrace test failures as expected on FreeBSD until we
19218 solve bug 17808. Closes ticket 18204.
19221 Changes in version 0.2.8.1-alpha - 2016-02-04
19222 Tor 0.2.8.1-alpha is the first alpha release in its series. It
19223 includes numerous small features and bugfixes against previous Tor
19224 versions, and numerous small infrastructure improvements. The most
19225 notable features are a set of improvements to the directory subsystem.
19227 o Major features (security, Linux):
19228 - When Tor starts as root on Linux and is told to switch user ID, it
19229 can now retain the capability to bind to low ports. By default,
19230 Tor will do this only when it's switching user ID and some low
19231 ports have been configured. You can change this behavior with the
19232 new option KeepBindCapabilities. Closes ticket 8195.
19234 o Major features (directory system):
19235 - When bootstrapping multiple consensus downloads at a time, use the
19236 first one that starts downloading, and close the rest. This
19237 reduces failures when authorities or fallback directories are slow
19238 or down. Together with the code for feature 15775, this feature
19239 should reduces failures due to fallback churn. Implements ticket
19240 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19241 "mikeperry" and "teor".
19242 - Include a trial list of 21 default fallback directories, generated
19243 in January 2016, based on an opt-in survey of suitable relays.
19244 Doing this should make clients bootstrap more quickly and reliably,
19245 and reduce the load on the directory authorities. Closes ticket
19246 15775. Patch by "teor".
19247 Candidates identified using an OnionOO script by "weasel", "teor",
19248 "gsathya", and "karsten".
19249 - Previously only relays that explicitly opened a directory port
19250 (DirPort) accepted directory requests from clients. Now all
19251 relays, with and without a DirPort, accept and serve tunneled
19252 directory requests that they receive through their ORPort. You can
19253 disable this behavior using the new DirCache option. Closes
19256 o Major key updates:
19257 - Update the V3 identity key for the dannenberg directory authority:
19258 it was changed on 18 November 2015. Closes task 17906. Patch
19261 o Minor features (security, clock):
19262 - Warn when the system clock appears to move back in time (when the
19263 state file was last written in the future). Tor doesn't know that
19264 consensuses have expired if the clock is in the past. Patch by
19265 "teor". Implements ticket 17188.
19267 o Minor features (security, exit policies):
19268 - ExitPolicyRejectPrivate now rejects more private addresses by
19269 default. Specifically, it now rejects the relay's outbound bind
19270 addresses (if configured), and the relay's configured port
19271 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19272 0.2.0.11-alpha. Patch by "teor".
19274 o Minor features (security, memory erasure):
19275 - Set the unused entries in a smartlist to NULL. This helped catch
19276 a (harmless) bug, and shouldn't affect performance too much.
19277 Implements ticket 17026.
19278 - Use SecureMemoryWipe() function to securely clean memory on
19279 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19280 Implements feature 17986.
19281 - Use explicit_bzero or memset_s when present. Previously, we'd use
19282 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19283 from <logan@hackers.mu> and <selven@hackers.mu>.
19284 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19285 zero size. Check size argument to memwipe() for underflow. Fixes
19286 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19289 o Minor features (security, RNG):
19290 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19291 positively are not allowed to fail. Previously we depended on
19292 internal details of OpenSSL's behavior. Closes ticket 17686.
19293 - Never use the system entropy output directly for anything besides
19294 seeding the PRNG. When we want to generate important keys, instead
19295 of using system entropy directly, we now hash it with the PRNG
19296 stream. This may help resist certain attacks based on broken OS
19297 entropy implementations. Closes part of ticket 17694.
19298 - Use modern system calls (like getentropy() or getrandom()) to
19299 generate strong entropy on platforms that have them. Closes
19302 o Minor features (accounting):
19303 - Added two modes to the AccountingRule option: One for limiting
19304 only the number of bytes sent ("AccountingRule out"), and one for
19305 limiting only the number of bytes received ("AccountingRule in").
19306 Closes ticket 15989; patch from "unixninja92".
19308 o Minor features (build):
19309 - Since our build process now uses "make distcheck", we no longer
19310 force "make dist" to depend on "make check". Closes ticket 17893;
19311 patch from "cypherpunks."
19312 - Tor now builds successfully with the recent OpenSSL 1.1
19313 development branch, and with the latest LibreSSL. Closes tickets
19314 17549, 17921, and 17984.
19316 o Minor features (controller):
19317 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19318 tickets 16774 and 17817. Patch by George Tankersley.
19319 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19320 service descriptor from a service's local hidden service
19321 descriptor cache. Closes ticket 14846.
19322 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19323 controllers can examine the the reject rules added by
19324 ExitPolicyRejectPrivate. This makes it easier for stem to display
19327 o Minor features (crypto):
19328 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19330 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19331 - When allocating a digest state object, allocate no more space than
19332 we actually need. Previously, we would allocate as much space as
19333 the state for the largest algorithm would need. This change saves
19334 up to 672 bytes per circuit. Closes ticket 17796.
19335 - Improve performance when hashing non-multiple of 8 sized buffers,
19336 based on Andrew Moon's public domain SipHash-2-4 implementation.
19337 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19339 o Minor features (directory downloads):
19340 - Wait for busy authorities and fallback directories to become non-
19341 busy when bootstrapping. (A similar change was made in 6c443e987d
19342 for directory caches chosen from the consensus.) Closes ticket
19343 17864; patch by "teor".
19344 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19345 directory mirrors. The default is 1; set it to 0 to disable
19346 fallbacks. Implements ticket 17576. Patch by "teor".
19348 o Minor features (geoip):
19349 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19352 o Minor features (IPv6):
19353 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19354 FallbackDir torrc options, to specify an IPv6 address for an
19355 authority or fallback directory. Add hard-coded ipv6 addresses for
19356 directory authorities that have them. Closes ticket 17327; patch
19357 from Nick Mathewson and "teor".
19358 - Add address policy assume_action support for IPv6 addresses.
19359 - Limit IPv6 mask bits to 128.
19360 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19361 almost always a bug. Closes ticket 17863; patch by "teor".
19362 - Allow users to configure directory authorities and fallback
19363 directory servers with IPv6 addresses and ORPorts. Resolves
19365 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19366 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19367 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19368 17638; bugfix on 0.0.2pre8. Patch by "teor".
19370 o Minor features (logging):
19371 - When logging to syslog, allow a tag to be added to the syslog
19372 identity (the string prepended to every log message). The tag can
19373 be configured with SyslogIdentityTag and defaults to none. Setting
19374 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19377 o Minor features (portability):
19378 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19379 patch from <logan@hackers.mu>.
19381 o Minor features (relay, address discovery):
19382 - Add a family argument to get_interface_addresses_raw() and
19383 subfunctions to make network interface address interogation more
19384 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19385 types of interfaces from the operating system. Resolves
19387 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19388 fails to enumerate interface addresses using the platform-specific
19389 API, have it rely on the UDP socket fallback technique to try and
19390 find out what IP addresses (both IPv4 and IPv6) our machine has.
19391 Resolves ticket 17951.
19393 o Minor features (replay cache):
19394 - The replay cache now uses SHA256 instead of SHA1. Implements
19395 feature 8961. Patch by "teor", issue reported by "rransom".
19397 o Minor features (unix file permissions):
19398 - Defer creation of Unix sockets until after setuid. This avoids
19399 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19400 CapabilityBoundingSet, or chown and fowner when using SELinux.
19401 Implements part of ticket 17562. Patch from Jamie Nguyen.
19402 - If any directory created by Tor is marked as group readable, the
19403 filesystem group is allowed to be either the default GID or the
19404 root user. Allowing root to read the DataDirectory prevents the
19405 need for CAP_READ_SEARCH when using systemd's
19406 CapabilityBoundingSet, or dac_read_search when using SELinux.
19407 Implements part of ticket 17562. Patch from Jamie Nguyen.
19408 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19409 1, the DataDirectory will be made readable by the default GID.
19410 Implements part of ticket 17562. Patch from Jamie Nguyen.
19412 o Minor bugfixes (accounting):
19413 - The max bandwidth when using 'AccountRule sum' is now correctly
19414 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19415 from "unixninja92".
19417 o Minor bugfixes (code correctness):
19418 - When closing an entry connection, generate a warning if we should
19419 have sent an end cell for it but we haven't. Fixes bug 17876;
19420 bugfix on 0.2.3.2-alpha.
19421 - Assert that allocated memory held by the reputation code is freed
19422 according to its internal counters. Fixes bug 17753; bugfix
19424 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19427 o Minor bugfixes (compilation):
19428 - Mark all object files that include micro-revision.i as depending
19429 on it, so as to make parallel builds more reliable. Fixes bug
19430 17826; bugfix on 0.2.5.1-alpha.
19431 - Don't try to use the pthread_condattr_setclock() function unless
19432 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19433 17819; bugfix on 0.2.6.3-alpha.
19434 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19436 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19437 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19438 - Fix search for libevent libraries on OpenBSD (and other systems
19439 that install libevent 1 and libevent 2 in parallel). Fixes bug
19440 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19441 - Isolate environment variables meant for tests from the rest of the
19442 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
19443 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
19445 - Remove config.log only from make distclean, not from make clean.
19446 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
19448 o Minor bugfixes (crypto):
19449 - Check the return value of HMAC() and assert on failure. Fixes bug
19450 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
19452 o Minor bugfixes (fallback directories):
19453 - Mark fallbacks as "too busy" when they return a 503 response,
19454 rather than just marking authorities. Fixes bug 17572; bugfix on
19455 0.2.4.7-alpha. Patch by "teor".
19457 o Minor bugfixes (IPv6):
19458 - Update the limits in max_dl_per_request for IPv6 address length.
19459 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
19461 o Minor bugfixes (linux seccomp2 sandbox):
19462 - Fix a crash when using offline master ed25519 keys with the Linux
19463 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
19465 o Minor bugfixes (logging):
19466 - In log messages that include a function name, use __FUNCTION__
19467 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
19468 with clang __PRETTY_FUNCTION__ has extra information we don't
19469 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
19471 - Remove needless quotes from a log message about unparseable
19472 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
19474 o Minor bugfixes (portability):
19475 - Remove an #endif from configure.ac so that we correctly detect the
19476 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
19479 o Minor bugfixes (relays):
19480 - Check that both the ORPort and DirPort (if present) are reachable
19481 before publishing a relay descriptor. Otherwise, relays publish a
19482 descriptor with DirPort 0 when the DirPort reachability test takes
19483 longer than the ORPort reachability test. Fixes bug 18050; bugfix
19484 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
19486 o Minor bugfixes (relays, hidden services):
19487 - Refuse connection requests to private OR addresses unless
19488 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
19489 then refuse to send any cells to a private address. Fixes bugs
19490 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
19492 o Minor bugfixes (safe logging):
19493 - When logging a malformed hostname received through socks4, scrub
19494 it if SafeLogging says we should. Fixes bug 17419; bugfix
19497 o Minor bugfixes (statistics code):
19498 - Consistently check for overflow in round_*_to_next_multiple_of
19499 functions, and add unit tests with additional and maximal values.
19500 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
19501 - Handle edge cases in the laplace functions: avoid division by
19502 zero, avoid taking the log of zero, and silence clang type
19503 conversion warnings using round and trunc. Add unit tests for edge
19504 cases with maximal values. Fixes part of bug 13192; bugfix
19507 o Minor bugfixes (testing):
19508 - The test for log_heartbeat was incorrectly failing in timezones
19509 with non-integer offsets. Instead of comparing the end of the time
19510 string against a constant, compare it to the output of
19511 format_local_iso_time when given the correct input. Fixes bug
19512 18039; bugfix on 0.2.5.4-alpha.
19513 - Make unit tests pass on IPv6-only systems, and systems without
19514 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
19515 bugfix on 0.2.7.3-rc. Patch by "teor".
19516 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
19518 - Check the full results of SHA256 and SHA512 digests in the unit
19519 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
19521 o Code simplification and refactoring:
19522 - Move logging of redundant policy entries in
19523 policies_parse_exit_policy_internal into its own function. Closes
19524 ticket 17608; patch from "juce".
19525 - Extract the more complicated parts of circuit_mark_for_close()
19526 into a new function that we run periodically before circuits are
19527 freed. This change removes more than half of the functions
19528 currently in the "blob". Closes ticket 17218.
19529 - Clean up a little duplicated code in
19530 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
19532 - Decouple the list of streams waiting to be attached to circuits
19533 from the overall connection list. This change makes it possible to
19534 attach streams quickly while simplifying Tor's callgraph and
19535 avoiding O(N) scans of the entire connection list. Closes
19537 - When a direct directory request fails immediately on launch,
19538 instead of relaunching that request from inside the code that
19539 launches it, instead mark the connection for teardown. This change
19540 simplifies Tor's callback and prevents the directory-request
19541 launching code from invoking itself recursively. Closes
19543 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
19544 use them. Closes ticket 17926.
19547 - Add a description of the correct use of the '--keygen' command-
19548 line option. Closes ticket 17583; based on text by 's7r'.
19549 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
19550 - Explain actual minima for BandwidthRate. Closes ticket 16382.
19551 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
19552 - Mention torspec URL in the manpage and point the reader to it
19553 whenever we mention a document that belongs in torspce. Fixes
19556 o Removed features:
19557 - Remove client-side support for connecting to Tor relays running
19558 versions of Tor before 0.2.3.6-alpha. These relays didn't support
19559 the v3 TLS handshake protocol, and are no longer allowed on the
19560 Tor network. Implements the client side of ticket 11150. Based on
19561 patches by Tom van der Woerdt.
19564 - Add unit tests to check for common RNG failure modes, such as
19565 returning all zeroes, identical values, or incrementing values
19566 (OpenSSL's rand_predictable feature). Patch by "teor".
19567 - Log more information when the backtrace tests fail. Closes ticket
19568 17892. Patch from "cypherpunks."
19569 - Always test both ed25519 backends, so that we can be sure that our
19570 batch-open replacement code works. Part of ticket 16794.
19571 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19572 portion of ticket 16831.
19573 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19574 util_format.c, directory.c, and options_validate.c. Closes tickets
19575 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19577 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19578 Patch from Reinaldo de Souza Jr.
19581 Changes in version 0.2.7.6 - 2015-12-10
19582 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
19583 well as a minor bug in hidden service reliability.
19585 o Major bugfixes (guard selection):
19586 - Actually look at the Guard flag when selecting a new directory
19587 guard. When we implemented the directory guard design, we
19588 accidentally started treating all relays as if they have the Guard
19589 flag during guard selection, leading to weaker anonymity and worse
19590 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
19593 o Minor features (geoip):
19594 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
19597 o Minor bugfixes (compilation):
19598 - When checking for net/pfvar.h, include netinet/in.h if possible.
19599 This fixes transparent proxy detection on OpenBSD. Fixes bug
19600 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
19601 - Fix a compilation warning with Clang 3.6: Do not check the
19602 presence of an address which can never be NULL. Fixes bug 17781.
19604 o Minor bugfixes (correctness):
19605 - When displaying an IPv6 exit policy, include the mask bits
19606 correctly even when the number is greater than 31. Fixes bug
19607 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
19608 - The wrong list was used when looking up expired intro points in a
19609 rend service object, causing what we think could be reachability
19610 issues for hidden services, and triggering a BUG log. Fixes bug
19611 16702; bugfix on 0.2.7.2-alpha.
19612 - Fix undefined behavior in the tor_cert_checksig function. Fixes
19613 bug 17722; bugfix on 0.2.7.2-alpha.
19616 Changes in version 0.2.7.5 - 2015-11-20
19617 The Tor 0.2.7 release series is dedicated to the memory of Tor user
19618 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
19619 tirelessly to advocate human rights regardless of national borders,
19620 and oppose the encroachments of mass surveillance. He opposed national
19621 exceptionalism, he brought clarity to legal and policy debates, he
19622 understood and predicted the impact of mass surveillance on the world,
19623 and he laid the groundwork for resisting it. While serving on the Tor
19624 Project's board of directors, he brought us his uncompromising focus
19625 on technical excellence in the service of humankind. Caspar was an
19626 inimitable force for good and a wonderful friend. He was kind,
19627 humorous, generous, gallant, and believed we should protect one
19628 another without exception. We honor him here for his ideals, his
19629 efforts, and his accomplishments. Please honor his memory with works
19630 that would make him proud.
19632 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
19634 The 0.2.7 series adds a more secure identity key type for relays,
19635 improves cryptography performance, resolves several longstanding
19636 hidden-service performance issues, improves controller support for
19637 hidden services, and includes small bugfixes and performance
19638 improvements throughout the program. This release series also includes
19639 more tests than before, and significant simplifications to which parts
19640 of Tor invoke which others.
19642 (This release contains no code changes since 0.2.7.4-rc.)
19645 Changes in version 0.2.7.4-rc - 2015-10-21
19646 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
19647 fixes some important memory leaks, and a scary-looking (but mostly
19648 harmless in practice) invalid-read bug. It also has a few small
19649 bugfixes, notably fixes for compilation and portability on different
19650 platforms. If no further significant bounds are found, the next
19651 release will the the official stable release.
19653 o Major bugfixes (security, correctness):
19654 - Fix an error that could cause us to read 4 bytes before the
19655 beginning of an openssl string. This bug could be used to cause
19656 Tor to crash on systems with unusual malloc implementations, or
19657 systems with unusual hardening installed. Fixes bug 17404; bugfix
19660 o Major bugfixes (correctness):
19661 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
19662 bug 17401; bugfix on 0.2.7.3-rc.
19664 o Major bugfixes (memory leaks):
19665 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
19666 17398; bugfix on 0.2.6.1-alpha.
19667 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
19668 17402; bugfix on 0.2.7.3-rc.
19669 - Fix a memory leak when reading an expired signing key from disk.
19670 Fixes bug 17403; bugfix on 0.2.7.2-rc.
19672 o Minor features (geoIP):
19673 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
19676 o Minor bugfixes (compilation):
19677 - Repair compilation with the most recent (unreleased, alpha)
19678 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
19679 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
19680 17251; bugfix on 0.2.7.2-alpha.
19681 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19682 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19684 o Minor bugfixes (portability):
19685 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
19686 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
19689 o Minor bugfixes (sandbox):
19690 - Add the "hidserv-stats" filename to our sandbox filter for the
19691 HiddenServiceStatistics option to work properly. Fixes bug 17354;
19692 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
19694 o Minor bugfixes (testing):
19695 - Add unit tests for get_interface_address* failure cases. Fixes bug
19696 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
19697 - Fix breakage when running 'make check' with BSD make. Fixes bug
19698 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
19699 - Make the get_ifaddrs_* unit tests more tolerant of different
19700 network configurations. (Don't assume every test box has an IPv4
19701 address, and don't assume every test box has a non-localhost
19702 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
19703 - Skip backtrace tests when backtrace support is not compiled in.
19704 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
19708 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
19709 - Note that HiddenServicePorts can take a unix domain socket. Closes
19713 Changes in version 0.2.7.3-rc - 2015-09-25
19714 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
19715 contains numerous usability fixes for Ed25519 keys, safeguards against
19716 several misconfiguration problems, significant simplifications to
19717 Tor's callgraph, and numerous bugfixes and small features.
19719 This is the most tested release of Tor to date. The unit tests cover
19720 39.40% of the code, and the integration tests (accessible with "make
19721 test-full-online", requiring stem and chutney and a network
19722 connection) raise the coverage to 64.49%.
19724 o Major features (security, hidden services):
19725 - Hidden services, if using the EntryNodes option, are required to
19726 use more than one EntryNode, in order to avoid a guard discovery
19727 attack. (This would only affect people who had configured hidden
19728 services and manually specified the EntryNodes option with a
19729 single entry-node. The impact was that it would be easy to
19730 remotely identify the guard node used by such a hidden service.
19731 See ticket for more information.) Fixes ticket 14917.
19733 o Major features (Ed25519 keys, keypinning):
19734 - The key-pinning option on directory authorities is now advisory-
19735 only by default. In a future version, or when the AuthDirPinKeys
19736 option is set, pins are enforced again. Disabling key-pinning
19737 seemed like a good idea so that we can survive the fallout of any
19738 usability problems associated with Ed25519 keys. Closes
19741 o Major features (Ed25519 performance):
19742 - Improve the speed of Ed25519 operations and Curve25519 keypair
19743 generation when built targeting 32 bit x86 platforms with SSE2
19744 available. Implements ticket 16535.
19745 - Improve the runtime speed of Ed25519 signature verification by
19746 using Ed25519-donna's batch verification support. Implements
19749 o Major features (performance testing):
19750 - The test-network.sh script now supports performance testing.
19751 Requires corresponding chutney performance testing changes. Patch
19752 by "teor". Closes ticket 14175.
19754 o Major features (relay, Ed25519):
19755 - Significant usability improvements for Ed25519 key management. Log
19756 messages are better, and the code can recover from far more
19757 failure conditions. Thanks to "s7r" for reporting and diagnosing
19759 - Add a new OfflineMasterKey option to tell Tor never to try loading
19760 or generating a secret Ed25519 identity key. You can use this in
19761 combination with tor --keygen to manage offline and/or encrypted
19762 Ed25519 keys. Implements ticket 16944.
19763 - Add a --newpass option to allow changing or removing the
19764 passphrase of an encrypted key with tor --keygen. Implements part
19766 - On receiving a HUP signal, check to see whether the Ed25519
19767 signing key has changed, and reload it if so. Closes ticket 16790.
19769 o Major bugfixes (relay, Ed25519):
19770 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
19771 0.2.7.2-alpha. Reported by "s7r".
19772 - Improve handling of expired signing keys with offline master keys.
19773 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
19775 o Minor features (client-side privacy):
19776 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
19777 lifespan when IsolateSOCKSAuth and streams with SOCKS
19778 authentication are attached to the circuit. This allows
19779 applications like TorBrowser to manage circuit lifetime on their
19780 own. Implements feature 15482.
19781 - When logging malformed hostnames from SOCKS5 requests, respect
19782 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
19784 o Minor features (compilation):
19785 - Give a warning as early as possible when trying to build with an
19786 unsupported OpenSSL version. Closes ticket 16901.
19787 - Fail during configure if we're trying to build against an OpenSSL
19788 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
19789 which started requiring ECC.
19791 o Minor features (geoip):
19792 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
19795 o Minor features (hidden services):
19796 - Relays need to have the Fast flag to get the HSDir flag. As this
19797 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
19798 drop. This change should make some attacks against the hidden
19799 service directory system harder. Fixes ticket 15963.
19800 - Turn on hidden service statistics collection by setting the torrc
19801 option HiddenServiceStatistics to "1" by default. (This keeps
19802 track only of the fraction of traffic used by hidden services, and
19803 the total number of hidden services in existence.) Closes
19805 - Client now uses an introduction point failure cache to know when
19806 to fetch or keep a descriptor in their cache. Previously, failures
19807 were recorded implicitly, but not explicitly remembered. Closes
19810 o Minor features (testing, authorities, documentation):
19811 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
19812 explicitly manage consensus flags in testing networks. Patch by
19813 "robgjansen", modified by "teor". Implements part of ticket 14882.
19815 o Minor bugfixes (security, exit policies):
19816 - ExitPolicyRejectPrivate now also rejects the relay's published
19817 IPv6 address (if any), and any publicly routable IPv4 or IPv6
19818 addresses on any local interfaces. ticket 17027. Patch by "teor".
19819 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
19821 o Minor bug fixes (torrc exit policies):
19822 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
19823 produce IPv6 wildcard addresses. Previously they would produce
19824 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
19825 of bug 16069; bugfix on 0.2.4.7-alpha.
19826 - When parsing torrc ExitPolicies, we now warn for a number of cases
19827 where the user's intent is likely to differ from Tor's actual
19828 behavior. These include: using an IPv4 address with an accept6 or
19829 reject6 line; using "private" on an accept6 or reject6 line; and
19830 including any ExitPolicy lines after accept *:* or reject *:*.
19831 Related to ticket 16069.
19832 - When parsing torrc ExitPolicies, we now issue an info-level
19833 message when expanding an "accept/reject *" line to include both
19834 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
19835 - In each instance above, usage advice is provided to avoid the
19836 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
19837 16069; bugfix on 0.2.4.7-alpha.
19839 o Minor bugfixes (authority):
19840 - Don't assign "HSDir" to a router if it isn't Valid and Running.
19841 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
19842 - Downgrade log messages about Ed25519 key issues if they are in old
19843 cached router descriptors. Fixes part of bug 16286; bugfix
19845 - When we find an Ed25519 key issue in a cached descriptor, stop
19846 saying the descriptor was just "uploaded". Fixes another part of
19847 bug 16286; bugfix on 0.2.7.2-alpha.
19849 o Minor bugfixes (control port):
19850 - Repair a warning and a spurious result when getting the maximum
19851 number of file descriptors from the controller. Fixes bug 16697;
19852 bugfix on 0.2.7.2-alpha.
19854 o Minor bugfixes (correctness):
19855 - When calling channel_free_list(), avoid calling smartlist_remove()
19856 while inside a FOREACH loop. This partially reverts commit
19857 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
19858 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
19860 o Minor bugfixes (documentation):
19861 - Advise users on how to configure separate IPv4 and IPv6 exit
19862 policies in the manpage and sample torrcs. Related to ticket 16069.
19863 - Fix the usage message of tor-resolve(1) so that it no longer lists
19864 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
19865 - Fix an error in the manual page and comments for
19866 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
19867 required "ORPort connectivity". While this is true, it is in no
19868 way unique to the HSDir flag. Of all the flags, only HSDirs need a
19869 DirPort configured in order for the authorities to assign that
19870 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
19873 o Minor bugfixes (Ed25519):
19874 - Fix a memory leak when reading router descriptors with expired
19875 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
19877 o Minor bugfixes (linux seccomp2 sandbox):
19878 - Allow bridge authorities to run correctly under the seccomp2
19879 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
19880 - Allow routers with ed25519 keys to run correctly under the
19881 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
19883 o Minor bugfixes (open file limit):
19884 - Fix set_max_file_descriptors() to set by default the max open file
19885 limit to the current limit when setrlimit() fails. Fixes bug
19886 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
19888 o Minor bugfixes (portability):
19889 - Try harder to normalize the exit status of the Tor process to the
19890 standard-provided range. Fixes bug 16975; bugfix on every version
19892 - Check correctly for Windows socket errors in the workqueue
19893 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
19894 - Fix the behavior of crypto_rand_time_range() when told to consider
19895 times before 1970. (These times were possible when running in a
19896 simulated network environment where time()'s output starts at
19897 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
19898 - Restore correct operation of TLS client-cipher detection on
19899 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
19901 o Minor bugfixes (relay):
19902 - Ensure that worker threads actually exit when a fatal error or
19903 shutdown is indicated. This fix doesn't currently affect the
19904 behavior of Tor, because Tor workers never indicates fatal error
19905 or shutdown except in the unit tests. Fixes bug 16868; bugfix
19907 - Unblock threads before releasing the work queue mutex to ensure
19908 predictable scheduling behavior. Fixes bug 16644; bugfix
19911 o Code simplification and refactoring:
19912 - Change the function that's called when we need to retry all
19913 downloads so that it only reschedules the downloads to happen
19914 immediately, rather than launching them all at once itself. This
19915 further simplifies Tor's callgraph.
19916 - Move some format-parsing functions out of crypto.c and
19917 crypto_curve25519.c into crypto_format.c and/or util_format.c.
19918 - Move the client-only parts of init_keys() into a separate
19919 function. Closes ticket 16763.
19920 - Simplify the microdesc_free() implementation so that it no longer
19921 appears (to code analysis tools) to potentially invoke a huge
19922 suite of other microdesc functions.
19923 - Simply the control graph further by deferring the inner body of
19924 directory_all_unreachable() into a callback. Closes ticket 16762.
19925 - Treat the loss of an owning controller as equivalent to a SIGTERM
19926 signal. This removes a tiny amount of duplicated code, and
19927 simplifies our callgraph. Closes ticket 16788.
19928 - When generating an event to send to the controller, we no longer
19929 put the event over the network immediately. Instead, we queue
19930 these events, and use a Libevent callback to deliver them. This
19931 change simplifies Tor's callgraph by reducing the number of
19932 functions from which all other Tor functions are reachable. Closes
19934 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
19935 that try to scan or compile every file on Unix won't decide that
19937 - Remove the unused "nulterminate" argument from buf_pullup().
19940 - Recommend a 40 GB example AccountingMax in torrc.sample rather
19941 than a 4 GB max. Closes ticket 16742.
19942 - Include the TUNING document in our source tarball. It is referred
19943 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
19947 - The internal pure-C tor-fw-helper tool is now removed from the Tor
19948 distribution, in favor of the pure-Go clone available from
19949 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
19950 used by the C tor-fw-helper are not, in our opinion, very
19951 confidence- inspiring in their secure-programming techniques.
19952 Closes ticket 13338.
19953 - Remove the code that would try to aggressively flush controller
19954 connections while writing to them. This code was introduced in
19955 0.1.2.7-alpha, in order to keep output buffers from exceeding
19956 their limits. But there is no longer a maximum output buffer size,
19957 and flushing data in this way caused some undesirable recursions
19958 in our call graph. Closes ticket 16480.
19961 - Make "bridges+hs" the default test network. This tests almost all
19962 tor functionality during make test-network, while allowing tests
19963 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
19964 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
19965 (chutney). Patches by "teor".
19966 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
19967 by-side in the same parent directory. Closes ticket 16903. Patch
19969 - Use environment variables rather than autoconf substitutions to
19970 send variables from the build system to the test scripts. This
19971 change should be easier to maintain, and cause 'make distcheck' to
19972 work better than before. Fixes bug 17148.
19973 - Add a new set of callgraph analysis scripts that use clang to
19974 produce a list of which Tor functions are reachable from which
19975 other Tor functions. We're planning to use these to help simplify
19976 our code structure by identifying illogical dependencies.
19977 - Add new 'test-full' and 'test-full-online' targets to run all
19978 tests, including integration tests with stem and chutney.
19979 - Make the test-workqueue test work on Windows by initializing the
19980 network before we begin.
19981 - New make target (make test-network-all) to run multiple applicable
19982 chutney test cases. Patch from Teor; closes 16953.
19983 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
19984 functions in dns.c. Implements a portion of ticket 16831.
19985 - When building Tor with testing coverage enabled, run Chutney tests
19986 (if any) using the 'tor-cov' coverage binary.
19987 - When running test-network or test-stem, check for the absence of
19988 stem/chutney before doing any build operations.
19991 Changes in version 0.2.7.2-alpha - 2015-07-27
19992 This, the second alpha in the Tor 0.2.7 series, has a number of new
19993 features, including a way to manually pick the number of introduction
19994 points for hidden services, and the much stronger Ed25519 signing key
19995 algorithm for regular Tor relays (including support for encrypted
19996 offline identity keys in the new algorithm).
19998 Support for Ed25519 on relays is currently limited to signing router
19999 descriptors; later alphas in this series will extend Ed25519 key
20000 support to more parts of the Tor protocol.
20002 o Major features (Ed25519 identity keys, Proposal 220):
20003 - All relays now maintain a stronger identity key, using the Ed25519
20004 elliptic curve signature format. This master key is designed so
20005 that it can be kept offline. Relays also generate an online
20006 signing key, and a set of other Ed25519 keys and certificates.
20007 These are all automatically regenerated and rotated as needed.
20008 Implements part of ticket 12498.
20009 - Directory authorities now vote on Ed25519 identity keys along with
20010 RSA1024 keys. Implements part of ticket 12498.
20011 - Directory authorities track which Ed25519 identity keys have been
20012 used with which RSA1024 identity keys, and do not allow them to
20013 vary freely. Implements part of ticket 12498.
20014 - Microdescriptors now include Ed25519 identity keys. Implements
20015 part of ticket 12498.
20016 - Add support for offline encrypted Ed25519 master keys. To use this
20017 feature on your tor relay, run "tor --keygen" to make a new master
20018 key (or to make a new signing key if you already have a master
20019 key). Closes ticket 13642.
20021 o Major features (Hidden services):
20022 - Add the torrc option HiddenServiceNumIntroductionPoints, to
20023 specify a fixed number of introduction points. Its maximum value
20024 is 10 and default is 3. Using this option can increase a hidden
20025 service's reliability under load, at the cost of making it more
20026 visible that the hidden service is facing extra load. Closes
20028 - Remove the adaptive algorithm for choosing the number of
20029 introduction points, which used to change the number of
20030 introduction points (poorly) depending on the number of
20031 connections the HS sees. Closes ticket 4862.
20033 o Major features (onion key cross-certification):
20034 - Relay descriptors now include signatures of their own identity
20035 keys, made using the TAP and ntor onion keys. These signatures
20036 allow relays to prove ownership of their own onion keys. Because
20037 of this change, microdescriptors will no longer need to include
20038 RSA identity keys. Implements proposal 228; closes ticket 12499.
20040 o Major features (performance):
20041 - Improve the runtime speed of Ed25519 operations by using the
20042 public-domain Ed25519-donna by Andrew M. ("floodyberry").
20043 Implements ticket 16467.
20044 - Improve the runtime speed of the ntor handshake by using an
20045 optimized curve25519 basepoint scalarmult implementation from the
20046 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
20047 ideas by Adam Langley. Implements ticket 9663.
20049 o Major bugfixes (client-side privacy, also in 0.2.6.9):
20050 - Properly separate out each SOCKSPort when applying stream
20051 isolation. The error occurred because each port's session group
20052 was being overwritten by a default value when the listener
20053 connection was initialized. Fixes bug 16247; bugfix on
20054 0.2.6.3-alpha. Patch by "jojelino".
20056 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
20057 - Stop refusing to store updated hidden service descriptors on a
20058 client. This reverts commit 9407040c59218 (which indeed fixed bug
20059 14219, but introduced a major hidden service reachability
20060 regression detailed in bug 16381). This is a temporary fix since
20061 we can live with the minor issue in bug 14219 (it just results in
20062 some load on the network) but the regression of 16381 is too much
20063 of a setback. First-round fix for bug 16381; bugfix
20066 o Major bugfixes (hidden services):
20067 - When cannibalizing a circuit for an introduction point, always
20068 extend to the chosen exit node (creating a 4 hop circuit).
20069 Previously Tor would use the current circuit exit node, which
20070 changed the original choice of introduction point, and could cause
20071 the hidden service to skip excluded introduction points or
20072 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
20075 o Major bugfixes (open file limit):
20076 - The open file limit wasn't checked before calling
20077 tor_accept_socket_nonblocking(), which would make Tor exceed the
20078 limit. Now, before opening a new socket, Tor validates the open
20079 file limit just before, and if the max has been reached, return an
20080 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
20082 o Major bugfixes (stability, also in 0.2.6.10):
20083 - Stop crashing with an assertion failure when parsing certain kinds
20084 of malformed or truncated microdescriptors. Fixes bug 16400;
20085 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20086 by "cypherpunks_backup".
20087 - Stop random client-side assertion failures that could occur when
20088 connecting to a busy hidden service, or connecting to a hidden
20089 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20092 o Minor features (directory authorities, security, also in 0.2.6.9):
20093 - The HSDir flag given by authorities now requires the Stable flag.
20094 For the current network, this results in going from 2887 to 2806
20095 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20096 attack by raising the effort for a relay to become Stable to
20097 require at the very least 7 days, while maintaining the 96 hours
20098 uptime requirement for HSDir. Implements ticket 8243.
20100 o Minor features (client):
20101 - Relax the validation of hostnames in SOCKS5 requests, allowing the
20102 character '_' to appear, in order to cope with domains observed in
20103 the wild that are serving non-RFC compliant records. Resolves
20105 - Relax the validation done to hostnames in SOCKS5 requests, and
20106 allow a single trailing '.' to cope with clients that pass FQDNs
20107 using that syntax to explicitly indicate that the domain name is
20108 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
20109 - Add GroupWritable and WorldWritable options to unix-socket based
20110 SocksPort and ControlPort options. These options apply to a single
20111 socket, and override {Control,Socks}SocketsGroupWritable. Closes
20114 o Minor features (control protocol):
20115 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
20116 the control protocol. Resolves ticket 15358.
20118 o Minor features (directory authorities):
20119 - Directory authorities no longer vote against the "Fast", "Stable",
20120 and "HSDir" flags just because they were going to vote against
20121 "Running": if the consensus turns out to be that the router was
20122 running, then the authority's vote should count. Patch from Peter
20123 Retzlaff; closes issue 8712.
20125 o Minor features (geoip, also in 0.2.6.10):
20126 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20127 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20129 o Minor features (hidden services):
20130 - Add the new options "HiddenServiceMaxStreams" and
20131 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
20132 limit the maximum number of simultaneous streams per circuit, and
20133 optionally tear down the circuit when the limit is exceeded. Part
20136 o Minor features (portability):
20137 - Use C99 variadic macros when the compiler is not GCC. This avoids
20138 failing compilations on MSVC, and fixes a log-file-based race
20139 condition in our old workarounds. Original patch from Gisle Vanem.
20141 o Minor bugfixes (compilation, also in 0.2.6.9):
20142 - Build with --enable-systemd correctly when libsystemd is
20143 installed, but systemd is not. Fixes bug 16164; bugfix on
20144 0.2.6.3-alpha. Patch from Peter Palfrader.
20146 o Minor bugfixes (controller):
20147 - Add the descriptor ID in each HS_DESC control event. It was
20148 missing, but specified in control-spec.txt. Fixes bug 15881;
20149 bugfix on 0.2.5.2-alpha.
20151 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
20152 - Check for failures from crypto_early_init, and refuse to continue.
20153 A previous typo meant that we could keep going with an
20154 uninitialized crypto library, and would have OpenSSL initialize
20155 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20156 when implementing ticket 4900. Patch by "teor".
20158 o Minor bugfixes (hidden services):
20159 - Fix a crash when reloading configuration while at least one
20160 configured and one ephemeral hidden service exists. Fixes bug
20161 16060; bugfix on 0.2.7.1-alpha.
20162 - Avoid crashing with a double-free bug when we create an ephemeral
20163 hidden service but adding it fails for some reason. Fixes bug
20164 16228; bugfix on 0.2.7.1-alpha.
20166 o Minor bugfixes (Linux seccomp2 sandbox):
20167 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
20168 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
20170 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
20171 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20172 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20173 on 0.2.6.3-alpha. Patch from "teor".
20175 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
20176 - Fix sandboxing to work when running as a relay, by allowing the
20177 renaming of secret_id_key, and allowing the eventfd2 and futex
20178 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
20180 - Allow systemd connections to work with the Linux seccomp2 sandbox
20181 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20184 o Minor bugfixes (relay):
20185 - Fix a rarely-encountered memory leak when failing to initialize
20186 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
20187 from "cypherpunks".
20189 o Minor bugfixes (systemd):
20190 - Fix an accidental formatting error that broke the systemd
20191 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
20192 - Tor's systemd unit file no longer contains extraneous spaces.
20193 These spaces would sometimes confuse tools like deb-systemd-
20194 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
20196 o Minor bugfixes (tests):
20197 - Use the configured Python executable when running test-stem-full.
20198 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
20200 o Minor bugfixes (tests, also in 0.2.6.9):
20201 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20202 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20204 o Minor bugfixes (threads, comments):
20205 - Always initialize return value in compute_desc_id in rendcommon.c
20206 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20207 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
20208 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20209 - Remove undefined directive-in-macro in test_util_writepid clang
20210 3.7 complains that using a preprocessor directive inside a macro
20211 invocation in test_util_writepid in test_util.c is undefined.
20212 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
20214 o Code simplification and refactoring:
20215 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
20216 to ensure they remain consistent and visible everywhere.
20217 - Remove some vestigial workarounds for the MSVC6 compiler. We
20218 haven't supported that in ages.
20219 - The link authentication code has been refactored for better
20220 testability and reliability. It now uses code generated with the
20221 "trunnel" binary encoding generator, to reduce the risk of bugs
20222 due to programmer error. Done as part of ticket 12498.
20225 - Include a specific and (hopefully) accurate documentation of the
20226 torrc file's meta-format in doc/torrc_format.txt. This is mainly
20227 of interest to people writing programs to parse or generate torrc
20228 files. This document is not a commitment to long-term
20229 compatibility; some aspects of the current format are a bit
20230 ridiculous. Closes ticket 2325.
20232 o Removed features:
20233 - Tor no longer supports copies of OpenSSL that are missing support
20234 for Elliptic Curve Cryptography. (We began using ECC when
20235 available in 0.2.4.8-alpha, for more safe and efficient key
20236 negotiation.) In particular, support for at least one of P256 or
20237 P224 is now required, with manual configuration needed if only
20238 P224 is available. Resolves ticket 16140.
20239 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20240 on an operating system that has not upgraded to OpenSSL 1.0 or
20241 later, and you compile Tor from source, you will need to install a
20242 more recent OpenSSL to link Tor against.) These versions of
20243 OpenSSL are still supported by the OpenSSL, but the numerous
20244 cryptographic improvements in later OpenSSL releases makes them a
20245 clear choice. Resolves ticket 16034.
20246 - Remove the HidServDirectoryV2 option. Now all relays offer to
20247 store hidden service descriptors. Related to 16543.
20248 - Remove the VoteOnHidServDirectoriesV2 option, since all
20249 authorities have long set it to 1. Closes ticket 16543.
20252 - Document use of coverity, clang static analyzer, and clang dynamic
20253 undefined behavior and address sanitizers in doc/HACKING. Include
20254 detailed usage instructions in the blacklist. Patch by "teor".
20255 Closes ticket 15817.
20256 - The link authentication protocol code now has extensive tests.
20257 - The relay descriptor signature testing code now has
20259 - The test_workqueue program now runs faster, and is enabled by
20260 default as a part of "make check".
20261 - Now that OpenSSL has its own scrypt implementation, add an unit
20262 test that checks for interoperability between libscrypt_scrypt()
20263 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20264 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20268 Changes in version 0.2.6.10 - 2015-07-12
20269 Tor version 0.2.6.10 fixes some significant stability and hidden
20270 service client bugs, bulletproofs the cryptography init process, and
20271 fixes a bug when using the sandbox code with some older versions of
20272 Linux. Everyone running an older version, especially an older version
20273 of 0.2.6, should upgrade.
20275 o Major bugfixes (hidden service clients, stability):
20276 - Stop refusing to store updated hidden service descriptors on a
20277 client. This reverts commit 9407040c59218 (which indeed fixed bug
20278 14219, but introduced a major hidden service reachability
20279 regression detailed in bug 16381). This is a temporary fix since
20280 we can live with the minor issue in bug 14219 (it just results in
20281 some load on the network) but the regression of 16381 is too much
20282 of a setback. First-round fix for bug 16381; bugfix
20285 o Major bugfixes (stability):
20286 - Stop crashing with an assertion failure when parsing certain kinds
20287 of malformed or truncated microdescriptors. Fixes bug 16400;
20288 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20289 by "cypherpunks_backup".
20290 - Stop random client-side assertion failures that could occur when
20291 connecting to a busy hidden service, or connecting to a hidden
20292 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20295 o Minor features (geoip):
20296 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20297 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20299 o Minor bugfixes (crypto error-handling):
20300 - Check for failures from crypto_early_init, and refuse to continue.
20301 A previous typo meant that we could keep going with an
20302 uninitialized crypto library, and would have OpenSSL initialize
20303 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20304 when implementing ticket 4900. Patch by "teor".
20306 o Minor bugfixes (Linux seccomp2 sandbox):
20307 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20308 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20309 on 0.2.6.3-alpha. Patch from "teor".
20312 Changes in version 0.2.6.9 - 2015-06-11
20313 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20314 requirements for receiving an HSDir flag, and addresses some other small
20315 bugs in the systemd and sandbox code. Clients using circuit isolation
20316 should upgrade; all directory authorities should upgrade.
20318 o Major bugfixes (client-side privacy):
20319 - Properly separate out each SOCKSPort when applying stream
20320 isolation. The error occurred because each port's session group was
20321 being overwritten by a default value when the listener connection
20322 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20325 o Minor feature (directory authorities, security):
20326 - The HSDir flag given by authorities now requires the Stable flag.
20327 For the current network, this results in going from 2887 to 2806
20328 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20329 attack by raising the effort for a relay to become Stable which
20330 takes at the very least 7 days to do so and by keeping the 96
20331 hours uptime requirement for HSDir. Implements ticket 8243.
20333 o Minor bugfixes (compilation):
20334 - Build with --enable-systemd correctly when libsystemd is
20335 installed, but systemd is not. Fixes bug 16164; bugfix on
20336 0.2.6.3-alpha. Patch from Peter Palfrader.
20338 o Minor bugfixes (Linux seccomp2 sandbox):
20339 - Fix sandboxing to work when running as a relaymby renaming of
20340 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20341 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20342 - Allow systemd connections to work with the Linux seccomp2 sandbox
20343 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20346 o Minor bugfixes (tests):
20347 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20348 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20351 Changes in version 0.2.6.8 - 2015-05-21
20352 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20353 fixes an authority-side bug in assigning the HSDir flag. All directory
20354 authorities should upgrade.
20356 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20357 - Revert commit that made directory authorities assign the HSDir
20358 flag to relays without a DirPort; this was bad because such relays
20359 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20362 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20363 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20364 a client authorized hidden service. Fixes bug 15823; bugfix
20367 o Minor features (geoip):
20368 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20369 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20373 Changes in version 0.2.7.1-alpha - 2015-05-12
20374 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20375 includes numerous small features and bugfixes against previous Tor
20376 versions, and numerous small infrastructure improvements. The most
20377 notable features are several new ways for controllers to interact with
20378 the hidden services subsystem.
20380 o New system requirements:
20381 - Tor no longer includes workarounds to support Libevent versions
20382 before 1.3e. Libevent 2.0 or later is recommended. Closes
20385 o Major features (controller):
20386 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20387 and management of hidden services via the controller. Closes
20389 - New "GETINFO onions/current" and "GETINFO onions/detached"
20390 commands to get information about hidden services created via the
20391 controller. Part of ticket 6411.
20392 - New HSFETCH command to launch a request for a hidden service
20393 descriptor. Closes ticket 14847.
20394 - New HSPOST command to upload a hidden service descriptor. Closes
20395 ticket 3523. Patch by "DonnchaC".
20397 o Major bugfixes (hidden services):
20398 - Revert commit that made directory authorities assign the HSDir
20399 flag to relays without a DirPort; this was bad because such relays
20400 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20403 o Minor features (clock-jump tolerance):
20404 - Recover better when our clock jumps back many hours, like might
20405 happen for Tails or Whonix users who start with a very wrong
20406 hardware clock, use Tor to discover a more accurate time, and then
20407 fix their clock. Resolves part of ticket 8766.
20409 o Minor features (command-line interface):
20410 - Make --hash-password imply --hush to prevent unnecessary noise.
20411 Closes ticket 15542. Patch from "cypherpunks".
20412 - Print a warning whenever we find a relative file path being used
20413 as torrc option. Resolves issue 14018.
20415 o Minor features (controller):
20416 - Add DirAuthority lines for default directory authorities to the
20417 output of the "GETINFO config/defaults" command if not already
20418 present. Implements ticket 14840.
20419 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20420 retrieve items from the client's hidden service descriptor cache.
20421 Closes ticket 14845.
20422 - Implement a new controller command "GETINFO status/fresh-relay-
20423 descs" to fetch a descriptor/extrainfo pair that was generated on
20424 demand just for the controller's use. Implements ticket 14784.
20426 o Minor features (DoS-resistance):
20427 - Make it harder for attackers to overload hidden services with
20428 introductions, by blocking multiple introduction requests on the
20429 same circuit. Resolves ticket 15515.
20431 o Minor features (geoip):
20432 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20433 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20436 o Minor features (HS popularity countermeasure):
20437 - To avoid leaking HS popularity, don't cycle the introduction point
20438 when we've handled a fixed number of INTRODUCE2 cells but instead
20439 cycle it when a random number of introductions is reached, thus
20440 making it more difficult for an attacker to find out the amount of
20441 clients that have used the introduction point for a specific HS.
20442 Closes ticket 15745.
20444 o Minor features (logging):
20445 - Include the Tor version in all LD_BUG log messages, since people
20446 tend to cut and paste those into the bugtracker. Implements
20449 o Minor features (pluggable transports):
20450 - When launching managed pluggable transports on Linux systems,
20451 attempt to have the kernel deliver a SIGTERM on tor exit if the
20452 pluggable transport process is still running. Resolves
20454 - When launching managed pluggable transports, setup a valid open
20455 stdin in the child process that can be used to detect if tor has
20456 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
20457 can be used by implementations to detect this new behavior.
20458 Resolves ticket 15435.
20460 o Minor features (testing):
20461 - Add a test to verify that the compiler does not eliminate our
20462 memwipe() implementation. Closes ticket 15377.
20463 - Add make rule `check-changes` to verify the format of changes
20464 files. Closes ticket 15180.
20465 - Add unit tests for control_event_is_interesting(). Add a compile-
20466 time check that the number of events doesn't exceed the capacity
20467 of control_event_t.event_mask. Closes ticket 15431, checks for
20468 bugs similar to 13085. Patch by "teor".
20469 - Command-line argument tests moved to Stem. Resolves ticket 14806.
20470 - Integrate the ntor, backtrace, and zero-length keys tests into the
20471 automake test suite. Closes ticket 15344.
20472 - Remove assertions during builds to determine Tor's test coverage.
20473 We don't want to trigger these even in assertions, so including
20474 them artificially makes our branch coverage look worse than it is.
20475 This patch provides the new test-stem-full and coverage-html-full
20476 configure options. Implements ticket 15400.
20478 o Minor bugfixes (build):
20479 - Improve out-of-tree builds by making non-standard rules work and
20480 clean up additional files and directories. Fixes bug 15053; bugfix
20483 o Minor bugfixes (command-line interface):
20484 - When "--quiet" is provided along with "--validate-config", do not
20485 write anything to stdout on success. Fixes bug 14994; bugfix
20487 - When complaining about bad arguments to "--dump-config", use
20488 stderr, not stdout.
20490 o Minor bugfixes (configuration, unit tests):
20491 - Only add the default fallback directories when the DirAuthorities,
20492 AlternateDirAuthority, and FallbackDir directory config options
20493 are set to their defaults. The default fallback directory list is
20494 currently empty, this fix will only change tor's behavior when it
20495 has default fallback directories. Includes unit tests for
20496 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
20497 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
20499 o Minor bugfixes (correctness):
20500 - For correctness, avoid modifying a constant string in
20501 handle_control_postdescriptor. Fixes bug 15546; bugfix
20503 - Remove side-effects from tor_assert() calls. This was harmless,
20504 because we never disable assertions, but it is bad style and
20505 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
20508 o Minor bugfixes (hidden service):
20509 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20510 a client authorized hidden service. Fixes bug 15823; bugfix
20512 - Remove an extraneous newline character from the end of hidden
20513 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
20515 o Minor bugfixes (interface):
20516 - Print usage information for --dump-config when it is used without
20517 an argument. Also, fix the error message to use different wording
20518 and add newline at the end. Fixes bug 15541; bugfix
20521 o Minor bugfixes (logs):
20522 - When building Tor under Clang, do not include an extra set of
20523 parentheses in log messages that include function names. Fixes bug
20524 15269; bugfix on every released version of Tor when compiled with
20525 recent enough Clang.
20527 o Minor bugfixes (network):
20528 - When attempting to use fallback technique for network interface
20529 lookup, disregard loopback and multicast addresses since they are
20530 unsuitable for public communications.
20532 o Minor bugfixes (statistics):
20533 - Disregard the ConnDirectionStatistics torrc options when Tor is
20534 not a relay since in that mode of operation no sensible data is
20535 being collected and because Tor might run into measurement hiccups
20536 when running as a client for some time, then becoming a relay.
20537 Fixes bug 15604; bugfix on 0.2.2.35.
20539 o Minor bugfixes (test networks):
20540 - When self-testing reachability, use ExtendAllowPrivateAddresses to
20541 determine if local/private addresses imply reachability. The
20542 previous fix used TestingTorNetwork, which implies
20543 ExtendAllowPrivateAddresses, but this excluded rare configurations
20544 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
20545 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
20546 issue discovered by CJ Ess.
20548 o Minor bugfixes (testing):
20549 - Check for matching value in server response in ntor_ref.py. Fixes
20550 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
20552 - Set the severity correctly when testing
20553 get_interface_addresses_ifaddrs() and
20554 get_interface_addresses_win32(), so that the tests fail gracefully
20555 instead of triggering an assertion. Fixes bug 15759; bugfix on
20556 0.2.6.3-alpha. Reported by Nicolas Derive.
20558 o Code simplification and refactoring:
20559 - Move the hacky fallback code out of get_interface_address6() into
20560 separate function and get it covered with unit-tests. Resolves
20562 - Refactor hidden service client-side cache lookup to intelligently
20563 report its various failure cases, and disentangle failure cases
20564 involving a lack of introduction points. Closes ticket 14391.
20565 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20566 control over the output. Part of ticket 15652.
20569 - Improve the descriptions of statistics-related torrc options in
20570 the manpage to describe rationale and possible uses cases. Fixes
20572 - Improve the layout and formatting of ./configure --help messages.
20573 Closes ticket 15024. Patch from "cypherpunks".
20574 - Standardize on the term "server descriptor" in the manual page.
20575 Previously, we had used "router descriptor", "server descriptor",
20576 and "relay descriptor" interchangeably. Part of ticket 14987.
20579 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
20580 and always use the internal Base64 decoder. The internal decoder
20581 has been part of tor since 0.2.0.10-alpha, and no one should
20582 be using the OpenSSL one. Part of ticket 15652.
20583 - Remove the 'tor_strclear()' function; use memwipe() instead.
20584 Closes ticket 14922.
20586 o Removed features:
20587 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
20588 fingerprinting we now recommend pluggable transports; for forward-
20589 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
20590 - Remove the undocumented "--digests" command-line option. It
20591 complicated our build process, caused subtle build issues on
20592 multiple platforms, and is now redundant since we started
20593 including git version identifiers. Closes ticket 14742.
20594 - Tor no longer contains checks for ancient directory cache versions
20595 that didn't know about microdescriptors.
20596 - Tor no longer contains workarounds for stat files generated by
20597 super-old versions of Tor that didn't choose guards sensibly.
20600 Changes in version 0.2.4.27 - 2015-04-06
20601 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
20602 could be used by an attacker to crash hidden services, or crash clients
20603 visiting hidden services. Hidden services should upgrade as soon as
20604 possible; clients should upgrade whenever packages become available.
20606 This release also backports a simple improvement to make hidden
20607 services a bit less vulnerable to denial-of-service attacks.
20609 o Major bugfixes (security, hidden service):
20610 - Fix an issue that would allow a malicious client to trigger an
20611 assertion failure and halt a hidden service. Fixes bug 15600;
20612 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20613 - Fix a bug that could cause a client to crash with an assertion
20614 failure when parsing a malformed hidden service descriptor. Fixes
20615 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20617 o Minor features (DoS-resistance, hidden service):
20618 - Introduction points no longer allow multiple INTRODUCE1 cells to
20619 arrive on the same circuit. This should make it more expensive for
20620 attackers to overwhelm hidden services with introductions.
20621 Resolves ticket 15515.
20624 Changes in version 0.2.5.12 - 2015-04-06
20625 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
20626 could be used by an attacker to crash hidden services, or crash clients
20627 visiting hidden services. Hidden services should upgrade as soon as
20628 possible; clients should upgrade whenever packages become available.
20630 This release also backports a simple improvement to make hidden
20631 services a bit less vulnerable to denial-of-service attacks.
20633 o Major bugfixes (security, hidden service):
20634 - Fix an issue that would allow a malicious client to trigger an
20635 assertion failure and halt a hidden service. Fixes bug 15600;
20636 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20637 - Fix a bug that could cause a client to crash with an assertion
20638 failure when parsing a malformed hidden service descriptor. Fixes
20639 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20641 o Minor features (DoS-resistance, hidden service):
20642 - Introduction points no longer allow multiple INTRODUCE1 cells to
20643 arrive on the same circuit. This should make it more expensive for
20644 attackers to overwhelm hidden services with introductions.
20645 Resolves ticket 15515.
20648 Changes in version 0.2.6.7 - 2015-04-06
20649 Tor 0.2.6.7 fixes two security issues that could be used by an
20650 attacker to crash hidden services, or crash clients visiting hidden
20651 services. Hidden services should upgrade as soon as possible; clients
20652 should upgrade whenever packages become available.
20654 This release also contains two simple improvements to make hidden
20655 services a bit less vulnerable to denial-of-service attacks.
20657 o Major bugfixes (security, hidden service):
20658 - Fix an issue that would allow a malicious client to trigger an
20659 assertion failure and halt a hidden service. Fixes bug 15600;
20660 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20661 - Fix a bug that could cause a client to crash with an assertion
20662 failure when parsing a malformed hidden service descriptor. Fixes
20663 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20665 o Minor features (DoS-resistance, hidden service):
20666 - Introduction points no longer allow multiple INTRODUCE1 cells to
20667 arrive on the same circuit. This should make it more expensive for
20668 attackers to overwhelm hidden services with introductions.
20669 Resolves ticket 15515.
20670 - Decrease the amount of reattempts that a hidden service performs
20671 when its rendezvous circuits fail. This reduces the computational
20672 cost for running a hidden service under heavy load. Resolves
20676 Changes in version 0.2.6.6 - 2015-03-24
20677 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
20679 It adds numerous safety, security, correctness, and performance
20680 improvements. Client programs can be configured to use more kinds of
20681 sockets, AutomapHosts works better, the multithreading backend is
20682 improved, cell transmission is refactored, test coverage is much
20683 higher, more denial-of-service attacks are handled, guard selection is
20684 improved to handle long-term guards better, pluggable transports
20685 should work a bit better, and some annoying hidden service performance
20686 bugs should be addressed.
20688 o Minor bugfixes (portability):
20689 - Use the correct datatype in the SipHash-2-4 function to prevent
20690 compilers from assuming any sort of alignment. Fixes bug 15436;
20691 bugfix on 0.2.5.3-alpha.
20693 Changes in version 0.2.6.5-rc - 2015-03-18
20694 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
20695 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
20697 o Major bugfixes (client):
20698 - Avoid crashing when making certain configuration option changes on
20699 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
20702 o Major bugfixes (pluggable transports):
20703 - Initialize the extended OR Port authentication cookie before
20704 launching pluggable transports. This prevents a race condition
20705 that occurred when server-side pluggable transports would cache the
20706 authentication cookie before it has been (re)generated. Fixes bug
20707 15240; bugfix on 0.2.5.1-alpha.
20709 o Major bugfixes (portability):
20710 - Do not crash on startup when running on Solaris. Fixes a bug
20711 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
20714 o Minor features (heartbeat):
20715 - On relays, report how many connections we negotiated using each
20716 version of the Tor link protocols. This information will let us
20717 know if removing support for very old versions of the Tor
20718 protocols is harming the network. Closes ticket 15212.
20720 o Code simplification and refactoring:
20721 - Refactor main loop to extract the 'loop' part. This makes it
20722 easier to run Tor under Shadow. Closes ticket 15176.
20725 Changes in version 0.2.5.11 - 2015-03-17
20726 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
20728 It backports several bugfixes from the 0.2.6 branch, including a
20729 couple of medium-level security fixes for relays and exit nodes.
20730 It also updates the list of directory authorities.
20732 o Directory authority changes:
20733 - Remove turtles as a directory authority.
20734 - Add longclaw as a new (v3) directory authority. This implements
20735 ticket 13296. This keeps the directory authority count at 9.
20736 - The directory authority Faravahar has a new IP address. This
20737 closes ticket 14487.
20739 o Major bugfixes (crash, OSX, security):
20740 - Fix a remote denial-of-service opportunity caused by a bug in
20741 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20744 o Major bugfixes (relay, stability, possible security):
20745 - Fix a bug that could lead to a relay crashing with an assertion
20746 failure if a buffer of exactly the wrong layout was passed to
20747 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20748 0.2.0.10-alpha. Patch from 'cypherpunks'.
20749 - Do not assert if the 'data' pointer on a buffer is advanced to the
20750 very end of the buffer; log a BUG message instead. Only assert if
20751 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20753 o Major bugfixes (exit node stability):
20754 - Fix an assertion failure that could occur under high DNS load.
20755 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20756 diagnosed and fixed by "cypherpunks".
20758 o Major bugfixes (Linux seccomp2 sandbox):
20759 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20760 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20761 0.2.5.1-alpha. Patch from "sanic".
20763 o Minor features (controller):
20764 - New "GETINFO bw-event-cache" to get information about recent
20765 bandwidth events. Closes ticket 14128. Useful for controllers to
20766 get recent bandwidth history after the fix for ticket 13988.
20768 o Minor features (geoip):
20769 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20770 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20773 o Minor bugfixes (client, automapping):
20774 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20775 no value follows the option. Fixes bug 14142; bugfix on
20776 0.2.4.7-alpha. Patch by "teor".
20777 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20778 14195; bugfix on 0.1.0.1-rc.
20780 o Minor bugfixes (compilation):
20781 - Build without warnings with the stock OpenSSL srtp.h header, which
20782 has a duplicate declaration of SSL_get_selected_srtp_profile().
20783 Fixes bug 14220; this is OpenSSL's bug, not ours.
20785 o Minor bugfixes (directory authority):
20786 - Allow directory authorities to fetch more data from one another if
20787 they find themselves missing lots of votes. Previously, they had
20788 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20789 bugfix on 0.1.2.5-alpha.
20790 - Enlarge the buffer to read bwauth generated files to avoid an
20791 issue when parsing the file in dirserv_read_measured_bandwidths().
20792 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20794 o Minor bugfixes (statistics):
20795 - Increase period over which bandwidth observations are aggregated
20796 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20798 o Minor bugfixes (preventative security, C safety):
20799 - When reading a hexadecimal, base-32, or base-64 encoded value from
20800 a string, always overwrite the whole output buffer. This prevents
20801 some bugs where we would look at (but fortunately, not reveal)
20802 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20806 Changes in version 0.2.4.26 - 2015-03-17
20807 Tor 0.2.4.26 includes an updated list of directory authorities. It
20808 also backports a couple of stability and security bugfixes from 0.2.5
20811 o Directory authority changes:
20812 - Remove turtles as a directory authority.
20813 - Add longclaw as a new (v3) directory authority. This implements
20814 ticket 13296. This keeps the directory authority count at 9.
20815 - The directory authority Faravahar has a new IP address. This
20816 closes ticket 14487.
20818 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
20819 - Fix an assertion failure that could occur under high DNS load.
20820 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20821 diagnosed and fixed by "cypherpunks".
20823 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
20824 - Fix a bug that could lead to a relay crashing with an assertion
20825 failure if a buffer of exactly the wrong layout was passed to
20826 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20827 0.2.0.10-alpha. Patch from 'cypherpunks'.
20828 - Do not assert if the 'data' pointer on a buffer is advanced to the
20829 very end of the buffer; log a BUG message instead. Only assert if
20830 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20832 o Minor features (geoip):
20833 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20834 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20837 Changes in version 0.2.6.4-rc - 2015-03-09
20838 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
20839 attacker might be able to use in order to crash certain Tor
20840 directories. It also resolves some minor issues left over from, or
20841 introduced in, Tor 0.2.6.3-alpha or earlier.
20843 o Major bugfixes (crash, OSX, security):
20844 - Fix a remote denial-of-service opportunity caused by a bug in
20845 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20848 o Major bugfixes (relay, stability, possible security):
20849 - Fix a bug that could lead to a relay crashing with an assertion
20850 failure if a buffer of exactly the wrong layout is passed to
20851 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20852 0.2.0.10-alpha. Patch from "cypherpunks".
20853 - Do not assert if the 'data' pointer on a buffer is advanced to the
20854 very end of the buffer; log a BUG message instead. Only assert if
20855 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20857 o Major bugfixes (FreeBSD IPFW transparent proxy):
20858 - Fix address detection with FreeBSD transparent proxies, when
20859 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
20862 o Major bugfixes (Linux seccomp2 sandbox):
20863 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
20864 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
20866 - Allow AF_UNIX hidden services to be used with the seccomp2
20867 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
20868 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20869 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20870 0.2.5.1-alpha. Patch from "sanic".
20872 o Minor features (controller):
20873 - Messages about problems in the bootstrap process now include
20874 information about the server we were trying to connect to when we
20875 noticed the problem. Closes ticket 15006.
20877 o Minor features (geoip):
20878 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20879 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20882 o Minor features (logs):
20883 - Quiet some log messages in the heartbeat and at startup. Closes
20886 o Minor bugfixes (certificate handling):
20887 - If an authority operator accidentally makes a signing certificate
20888 with a future publication time, do not discard its real signing
20889 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
20890 - Remove any old authority certificates that have been superseded
20891 for at least two days. Previously, we would keep superseded
20892 certificates until they expired, if they were published close in
20893 time to the certificate that superseded them. Fixes bug 11454;
20894 bugfix on 0.2.1.8-alpha.
20896 o Minor bugfixes (compilation):
20897 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
20899 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
20902 o Minor bugfixes (testing):
20903 - Fix endianness issues in unit test for resolve_my_address() to
20904 have it pass on big endian systems. Fixes bug 14980; bugfix on
20906 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
20907 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
20908 - When running the new 'make test-stem' target, use the configured
20909 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
20910 from "cypherpunks".
20911 - When running the zero-length-keys tests, do not use the default
20912 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
20915 o Directory authority IP change:
20916 - The directory authority Faravahar has a new IP address. This
20917 closes ticket 14487.
20920 - Remove some lingering dead code that once supported mempools.
20921 Mempools were disabled by default in 0.2.5, and removed entirely
20922 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
20926 Changes in version 0.2.6.3-alpha - 2015-02-19
20927 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
20928 the 0.2.6.x series. It introduces support for more kinds of sockets,
20929 makes it harder to accidentally run an exit, improves our
20930 multithreading backend, incorporates several fixes for the
20931 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
20933 If no major regressions or security holes are found in this version,
20934 the next version will be a release candidate.
20936 o Deprecated versions:
20937 - Tor relays older than 0.2.4.18-rc are no longer allowed to
20938 advertise themselves on the network. Closes ticket 13555.
20940 o Major features (security, unix domain sockets):
20941 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
20942 applications can reach Tor without having to create AF_INET or
20943 AF_INET6 sockets, meaning they can completely disable their
20944 ability to make non-Tor network connections. To create a socket of
20945 this type, use "SocksPort unix:/path/to/socket". Implements
20947 - Support mapping hidden service virtual ports to AF_UNIX sockets.
20948 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
20949 Implements ticket 11485.
20951 o Major features (changed defaults):
20952 - Prevent relay operators from unintentionally running exits: When a
20953 relay is configured as an exit node, we now warn the user unless
20954 the "ExitRelay" option is set to 1. We warn even more loudly if
20955 the relay is configured with the default exit policy, since this
20956 can indicate accidental misconfiguration. Setting "ExitRelay 0"
20957 stops Tor from running as an exit relay. Closes ticket 10067.
20959 o Major features (directory system):
20960 - When downloading server- or microdescriptors from a directory
20961 server, we no longer launch multiple simultaneous requests to the
20962 same server. This reduces load on the directory servers,
20963 especially when directory guards are in use. Closes ticket 9969.
20964 - When downloading server- or microdescriptors over a tunneled
20965 connection, do not limit the length of our requests to what the
20966 Squid proxy is willing to handle. Part of ticket 9969.
20967 - Authorities can now vote on the correct digests and latest
20968 versions for different software packages. This allows packages
20969 that include Tor to use the Tor authority system as a way to get
20970 notified of updates and their correct digests. Implements proposal
20971 227. Closes ticket 10395.
20973 o Major features (guards):
20974 - Introduce the Guardfraction feature to improves load balancing on
20975 guard nodes. Specifically, it aims to reduce the traffic gap that
20976 guard nodes experience when they first get the Guard flag. This is
20977 a required step if we want to increase the guard lifetime to 9
20978 months or greater. Closes ticket 9321.
20980 o Major features (performance):
20981 - Make the CPU worker implementation more efficient by avoiding the
20982 kernel and lengthening pipelines. The original implementation used
20983 sockets to transfer data from the main thread to the workers, and
20984 didn't allow any thread to be assigned more than a single piece of
20985 work at once. The new implementation avoids communications
20986 overhead by making requests in shared memory, avoiding kernel IO
20987 where possible, and keeping more requests in flight at once.
20988 Implements ticket 9682.
20990 o Major features (relay):
20991 - Raise the minimum acceptable configured bandwidth rate for bridges
20992 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
20993 20 KiB/sec.) Closes ticket 13822.
20995 o Major bugfixes (exit node stability):
20996 - Fix an assertion failure that could occur under high DNS load.
20997 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20998 diagnosed and fixed by "cypherpunks".
21000 o Major bugfixes (mixed relay-client operation):
21001 - When running as a relay and client at the same time (not
21002 recommended), if we decide not to use a new guard because we want
21003 to retry older guards, only close the locally-originating circuits
21004 passing through that guard. Previously we would close all the
21005 circuits through that guard. Fixes bug 9819; bugfix on
21006 0.2.1.1-alpha. Reported by "skruffy".
21008 o Minor features (build):
21009 - New --disable-system-torrc compile-time option to prevent Tor from
21010 looking for the system-wide torrc or torrc-defaults files.
21011 Resolves ticket 13037.
21013 o Minor features (controller):
21014 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
21015 events so controllers can observe circuit isolation inputs. Closes
21017 - ControlPort now supports the unix:/path/to/socket syntax as an
21018 alternative to the ControlSocket option, for consistency with
21019 SocksPort and HiddenServicePort. Closes ticket 14451.
21020 - New "GETINFO bw-event-cache" to get information about recent
21021 bandwidth events. Closes ticket 14128. Useful for controllers to
21022 get recent bandwidth history after the fix for ticket 13988.
21024 o Minor features (Denial of service resistance):
21025 - Count the total number of bytes used storing hidden service
21026 descriptors against the value of MaxMemInQueues. If we're low on
21027 memory, and more than 20% of our memory is used holding hidden
21028 service descriptors, free them until no more than 10% of our
21029 memory holds hidden service descriptors. Free the least recently
21030 fetched descriptors first. Resolves ticket 13806.
21031 - When we have recently been under memory pressure (over 3/4 of
21032 MaxMemInQueues is allocated), then allocate smaller zlib objects
21033 for small requests. Closes ticket 11791.
21035 o Minor features (geoip):
21036 - Update geoip and geoip6 files to the January 7 2015 Maxmind
21037 GeoLite2 Country database.
21039 o Minor features (guard nodes):
21040 - Reduce the time delay before saving guard status to disk from 10
21041 minutes to 30 seconds (or from one hour to 10 minutes if
21042 AvoidDiskWrites is set). Closes ticket 12485.
21044 o Minor features (hidden service):
21045 - Make Sybil attacks against hidden services harder by changing the
21046 minimum time required to get the HSDir flag from 25 hours up to 96
21047 hours. Addresses ticket 14149.
21048 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
21049 services to disable the anti-scanning feature introduced in
21050 0.2.6.2-alpha. With this option not set, a connection to an
21051 unlisted port closes the circuit. With this option set, only a
21052 RELAY_DONE cell is sent. Closes ticket 14084.
21054 o Minor features (interface):
21055 - Implement "-f -" command-line option to read torrc configuration
21056 from standard input, if you don't want to store the torrc file in
21057 the file system. Implements feature 13865.
21059 o Minor features (logging):
21060 - Add a count of unique clients to the bridge heartbeat message.
21061 Resolves ticket 6852.
21062 - Suppress "router info incompatible with extra info" message when
21063 reading extrainfo documents from cache. (This message got loud
21064 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
21066 - Elevate hidden service authorized-client message from DEBUG to
21067 INFO. Closes ticket 14015.
21069 o Minor features (stability):
21070 - Add assertions in our hash-table iteration code to check for
21071 corrupted values that could cause infinite loops. Closes
21074 o Minor features (systemd):
21075 - Various improvements and modernizations in systemd hardening
21076 support. Closes ticket 13805. Patch from Craig Andrews.
21078 o Minor features (testing networks):
21079 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
21080 and the default on a testing network to 2 minutes. Drop the
21081 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
21082 keep the default on a testing network at 30 seconds. This reduces
21083 HS bootstrap time to around 25 seconds. Also, change the default
21084 time in test-network.sh to match. Closes ticket 13401. Patch
21086 - Create TestingDirAuthVoteHSDir to correspond to
21087 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
21088 HSDir flag for the listed relays regardless of uptime or ORPort
21089 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
21090 Partial implementation for ticket 14067. Patch by "teor".
21092 o Minor features (tor2web mode):
21093 - Introduce the config option Tor2webRendezvousPoints, which allows
21094 clients in Tor2webMode to select a specific Rendezvous Point to be
21095 used in HS circuits. This might allow better performance for
21096 Tor2Web nodes. Implements ticket 12844.
21098 o Minor bugfixes (client DNS):
21099 - Report the correct cached DNS expiration times on SOCKS port or in
21100 DNS replies. Previously, we would report everything as "never
21101 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
21102 - Avoid a small memory leak when we find a cached answer for a
21103 reverse DNS lookup in a client-side DNS cache. (Remember, client-
21104 side DNS caching is off by default, and is not recommended.) Fixes
21105 bug 14259; bugfix on 0.2.0.1-alpha.
21107 o Minor bugfixes (client, automapping):
21108 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
21109 no value follows the option. Fixes bug 14142; bugfix on
21110 0.2.4.7-alpha. Patch by "teor".
21111 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
21112 14195; bugfix on 0.1.0.1-rc.
21113 - Prevent changes to other options from removing the wildcard value
21114 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
21116 - Allow MapAddress and AutomapHostsOnResolve to work together when
21117 an address is mapped into another address type (like .onion) that
21118 must be automapped at resolve time. Fixes bug 7555; bugfix
21121 o Minor bugfixes (client, bridges):
21122 - When we are using bridges and we had a network connectivity
21123 problem, only retry connecting to our currently configured
21124 bridges, not all bridges we know about and remember using. Fixes
21125 bug 14216; bugfix on 0.2.2.17-alpha.
21127 o Minor bugfixes (client, IPv6):
21128 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
21129 flag is not set; and not because the NoIPv4Traffic flag was set.
21130 Previously we'd looked at the NoIPv4Traffic flag for both types of
21131 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
21133 o Minor bugfixes (compilation):
21134 - The address of an array in the middle of a structure will always
21135 be non-NULL. clang recognises this and complains. Disable the
21136 tautologous and redundant check to silence this warning. Fixes bug
21137 14001; bugfix on 0.2.1.2-alpha.
21138 - Avoid warnings when building with systemd 209 or later. Fixes bug
21139 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
21140 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
21141 Addresses ticket 14188.
21142 - Build without warnings with the stock OpenSSL srtp.h header, which
21143 has a duplicate declaration of SSL_get_selected_srtp_profile().
21144 Fixes bug 14220; this is OpenSSL's bug, not ours.
21145 - Do not compile any code related to Tor2Web mode when Tor2Web mode
21146 is not enabled at compile time. Previously, this code was included
21147 in a disabled state. See discussion on ticket 12844.
21148 - Remove the --disable-threads configure option again. It was
21149 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
21150 14819; bugfix on 0.2.6.2-alpha.
21152 o Minor bugfixes (controller):
21153 - Report "down" in response to the "GETINFO entry-guards" command
21154 when relays are down with an unreachable_since value. Previously,
21155 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
21156 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
21157 14116; bugfix on 0.2.2.9-alpha.
21158 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
21159 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
21161 o Minor bugfixes (directory authority):
21162 - Allow directory authorities to fetch more data from one another if
21163 they find themselves missing lots of votes. Previously, they had
21164 been bumping against the 10 MB queued data limit. Fixes bug 14261;
21165 bugfix on 0.1.2.5-alpha.
21166 - Do not attempt to download extrainfo documents which we will be
21167 unable to validate with a matching server descriptor. Fixes bug
21168 13762; bugfix on 0.2.0.1-alpha.
21169 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
21170 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
21171 - Enlarge the buffer to read bwauth generated files to avoid an
21172 issue when parsing the file in dirserv_read_measured_bandwidths().
21173 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
21175 o Minor bugfixes (file handling):
21176 - Stop failing when key files are zero-length. Instead, generate new
21177 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
21178 on all versions of Tor. Patch by "teor".
21179 - Stop generating a fresh .old RSA onion key file when the .old file
21180 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
21181 - Avoid overwriting .old key files with empty key files.
21182 - Skip loading zero-length extrainfo store, router store, stats,
21183 state, and key files.
21184 - Avoid crashing when trying to reload a torrc specified as a
21185 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
21188 o Minor bugfixes (hidden services):
21189 - Close the introduction circuit when we have no more usable intro
21190 points, instead of waiting for it to time out. This also ensures
21191 that no follow-up HS descriptor fetch is triggered when the
21192 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
21193 - When fetching a hidden service descriptor for a down service that
21194 was recently up, do not keep refetching until we try the same
21195 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
21196 - Successfully launch Tor with a nonexistent hidden service
21197 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
21198 14106; bugfix on 0.2.6.2-alpha.
21200 o Minor bugfixes (logging):
21201 - Avoid crashing when there are more log domains than entries in
21202 domain_list. Bugfix on 0.2.3.1-alpha.
21203 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
21205 - Don't log messages to stdout twice when starting up. Fixes bug
21206 13993; bugfix on 0.2.6.1-alpha.
21208 o Minor bugfixes (parsing):
21209 - Stop accepting milliseconds (or other junk) at the end of
21210 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
21211 - Support two-number and three-number version numbers correctly, in
21212 case we change the Tor versioning system in the future. Fixes bug
21213 13661; bugfix on 0.0.8pre1.
21215 o Minor bugfixes (path counting):
21216 - When deciding whether the consensus lists any exit nodes, count
21217 the number listed in the consensus, not the number we have
21218 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
21219 - When deciding whether we have any exit nodes, only examine
21220 ExitNodes when the ExitNodes option is actually set. Fixes part of
21221 bug 14918; bugfix on 0.2.6.2-alpha.
21222 - Get rid of redundant and possibly scary warnings that we are
21223 missing directory information while we bootstrap. Fixes part of
21224 bug 14918; bugfix on 0.2.6.2-alpha.
21226 o Minor bugfixes (portability):
21227 - Fix the ioctl()-based network interface lookup code so that it
21228 will work on systems that have variable-length struct ifreq, for
21230 - Fix scheduler compilation on targets where char is unsigned. Fixes
21231 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
21233 o Minor bugfixes (sandbox):
21234 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21235 Previously, glibc would try to write them to /dev/tty, and the
21236 sandbox would trap the call and make Tor exit prematurely. Fixes
21237 bug 14759; bugfix on 0.2.5.1-alpha.
21239 o Minor bugfixes (shutdown):
21240 - When shutting down, always call event_del() on lingering read or
21241 write events before freeing them. Otherwise, we risk double-frees
21242 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21245 o Minor bugfixes (small memory leaks):
21246 - Avoid leaking memory when using IPv6 virtual address mappings.
21247 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21250 o Minor bugfixes (statistics):
21251 - Increase period over which bandwidth observations are aggregated
21252 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21254 o Minor bugfixes (systemd support):
21255 - Fix detection and operation of systemd watchdog. Fixes part of bug
21256 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21257 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21258 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21259 - Inform the systemd supervisor about more changes in the Tor
21260 process status. Implements part of ticket 14141. Patch from
21262 - Cause the "--disable-systemd" option to actually disable systemd
21263 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21266 o Minor bugfixes (TLS):
21267 - Check more thoroughly throughout the TLS code for possible
21268 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21270 o Minor bugfixes (transparent proxy):
21271 - Use getsockname, not getsockopt, to retrieve the address for a
21272 TPROXY-redirected connection. Fixes bug 13796; bugfix
21275 o Code simplification and refactoring:
21276 - Move fields related to isolating and configuring client ports into
21277 a shared structure. Previously, they were duplicated across
21278 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21279 to copy them correctly had been the cause of at least one bug in
21280 the past. Closes ticket 8546.
21281 - Refactor the get_interface_addresses_raw() doom-function into
21282 multiple smaller and simpler subfunctions. Cover the resulting
21283 subfunctions with unit-tests. Fixes a significant portion of
21285 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21286 only for version <= 0.2.2.24 which is now deprecated. Closes
21288 - Remove a test for a long-defunct broken version-one
21292 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21293 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21294 - Make the tor-resolve documentation match its help string and its
21295 options. Resolves part of ticket 14325.
21296 - Log a more useful error message from tor-resolve when failing to
21297 look up a hidden service address. Resolves part of ticket 14325.
21299 o Downgraded warnings:
21300 - Don't warn when we've attempted to contact a relay using the wrong
21301 ntor onion key. Closes ticket 9635.
21303 o Removed features:
21304 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21305 longer silently accepted as an alias for "ExitNodes".
21306 - The --enable-mempool and --enable-buf-freelists options, which
21307 were originally created to work around bad malloc implementations,
21308 no longer exist. They were off-by-default in 0.2.5. Closes
21312 - Make the checkdir/perms test complete successfully even if the
21313 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21314 - Test that tor does not fail when key files are zero-length. Check
21315 that tor generates new keys, and overwrites the empty key files.
21316 - Test that tor generates new keys when keys are missing
21317 (existing behavior).
21318 - Test that tor does not overwrite key files that already contain
21319 data (existing behavior). Tests bug 13111. Patch by "teor".
21320 - New "make test-stem" target to run stem integration tests.
21321 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21322 Closes ticket 14107.
21323 - Make the test_cmdline_args.py script work correctly on Windows.
21324 Patch from Gisle Vanem.
21325 - Move the slower unit tests into a new "./src/test/test-slow"
21326 binary that can be run independently of the other tests. Closes
21328 - Avoid undefined behavior when sampling huge values from the
21329 Laplace distribution. This made unittests fail on Raspberry Pi.
21330 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21333 Changes in version 0.2.6.2-alpha - 2014-12-31
21334 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21335 It introduces a major new backend for deciding when to send cells on
21336 channels, which should lead down the road to big performance
21337 increases. It contains security and statistics features for better
21338 work on hidden services, and numerous bugfixes.
21340 This release contains many new unit tests, along with major
21341 performance improvements for running testing networks using Chutney.
21342 Thanks to a series of patches contributed by "teor", testing networks
21343 should now bootstrap in seconds, rather than minutes.
21345 o Major features (relay, infrastructure):
21346 - Complete revision of the code that relays use to decide which cell
21347 to send next. Formerly, we selected the best circuit to write on
21348 each channel, but we didn't select among channels in any
21349 sophisticated way. Now, we choose the best circuits globally from
21350 among those whose channels are ready to deliver traffic.
21352 This patch implements a new inter-cmux comparison API, a global
21353 high/low watermark mechanism and a global scheduler loop for
21354 transmission prioritization across all channels as well as among
21355 circuits on one channel. This schedule is currently tuned to
21356 (tolerantly) avoid making changes in network performance, but it
21357 should form the basis for major circuit performance increases in
21358 the future. Code by Andrea; tuning by Rob Jansen; implements
21361 o Major features (hidden services):
21362 - Make HS port scanning more difficult by immediately closing the
21363 circuit when a user attempts to connect to a nonexistent port.
21364 Closes ticket 13667.
21365 - Add a HiddenServiceStatistics option that allows Tor relays to
21366 gather and publish statistics about the overall size and volume of
21367 hidden service usage. Specifically, when this option is turned on,
21368 an HSDir will publish an approximate number of hidden services
21369 that have published descriptors to it the past 24 hours. Also, if
21370 a relay has acted as a hidden service rendezvous point, it will
21371 publish the approximate amount of rendezvous cells it has relayed
21372 the past 24 hours. The statistics themselves are obfuscated so
21373 that the exact values cannot be derived. For more details see
21374 proposal 238, "Better hidden service stats from Tor relays". This
21375 feature is currently disabled by default. Implements feature 13192.
21377 o Major bugfixes (client, automap):
21378 - Repair automapping with IPv6 addresses. This automapping should
21379 have worked previously, but one piece of debugging code that we
21380 inserted to detect a regression actually caused the regression to
21381 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21382 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21385 o Major bugfixes (hidden services):
21386 - When closing an introduction circuit that was opened in parallel
21387 with others, don't mark the introduction point as unreachable.
21388 Previously, the first successful connection to an introduction
21389 point would make the other introduction points get marked as
21390 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21392 o Directory authority changes:
21393 - Remove turtles as a directory authority.
21394 - Add longclaw as a new (v3) directory authority. This implements
21395 ticket 13296. This keeps the directory authority count at 9.
21397 o Major removed features:
21398 - Tor clients no longer support connecting to hidden services
21399 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21400 option has been removed. (There shouldn't be any hidden services
21401 running these versions on the network.) Closes ticket 7803.
21403 o Minor features (client):
21404 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21405 is enabled, reject requests with IP addresses as hostnames.
21406 Resolves ticket 13315.
21408 o Minor features (controller):
21409 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21410 write an unscheduled heartbeat message to the log. Implements
21413 o Minor features (geoip):
21414 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21417 o Minor features (hidden services):
21418 - When re-enabling the network, don't try to build introduction
21419 circuits until we have successfully built a circuit. This makes
21420 hidden services come up faster when the network is re-enabled.
21421 Patch from "akwizgran". Closes ticket 13447.
21422 - When we fail to retrieve a hidden service descriptor, send the
21423 controller an "HS_DESC FAILED" controller event. Implements
21425 - New HiddenServiceDirGroupReadable option to cause hidden service
21426 directories and hostname files to be created group-readable. Patch
21427 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21429 o Minor features (systemd):
21430 - Where supported, when running with systemd, report successful
21431 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21432 - When running with systemd, support systemd watchdog messages. Part
21433 of ticket 11016. Patch by Michael Scherer.
21435 o Minor features (transparent proxy):
21436 - Update the transparent proxy option checks to allow for both ipfw
21437 and pf on OS X. Closes ticket 14002.
21438 - Use the correct option when using IPv6 with transparent proxy
21439 support on Linux. Resolves 13808. Patch by Francisco Blas
21442 o Minor bugfixes (preventative security, C safety):
21443 - When reading a hexadecimal, base-32, or base-64 encoded value from
21444 a string, always overwrite the whole output buffer. This prevents
21445 some bugs where we would look at (but fortunately, not reveal)
21446 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21448 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
21449 just the part that's used. This makes it harder for data leak bugs
21450 to occur in the event of other programming failures. Resolves
21453 o Minor bugfixes (client, microdescriptors):
21454 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
21455 computing which microdescriptors to download. This keeps us from
21456 erroneous download behavior if two microdescriptor digests ever
21457 have the same first 160 bits. Fixes part of bug 13399; bugfix
21459 - Reset a router's status if its microdescriptor digest changes,
21460 even if the first 160 bits remain the same. Fixes part of bug
21461 13399; bugfix on 0.2.3.1-alpha.
21463 o Minor bugfixes (compilation):
21464 - Silence clang warnings under --enable-expensive-hardening,
21465 including implicit truncation of 64 bit values to 32 bit, const
21466 char assignment to self, tautological compare, and additional
21467 parentheses around equality tests. Fixes bug 13577; bugfix
21469 - Fix a clang warning about checking whether an address in the
21470 middle of a structure is NULL. Fixes bug 14001; bugfix
21473 o Minor bugfixes (hidden services):
21474 - Correctly send a controller event when we find that a rendezvous
21475 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
21476 - Pre-check directory permissions for new hidden-services to avoid
21477 at least one case of "Bug: Acting on config options left us in a
21478 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
21479 - When adding a new hidden service (for example, via SETCONF), Tor
21480 no longer congratulates the user for running a relay. Fixes bug
21481 13941; bugfix on 0.2.6.1-alpha.
21482 - When fetching hidden service descriptors, we now check not only
21483 for whether we got the hidden service we had in mind, but also
21484 whether we got the particular descriptors we wanted. This prevents
21485 a class of inefficient but annoying DoS attacks by hidden service
21486 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
21489 o Minor bugfixes (Linux seccomp2 sandbox):
21490 - Make transparent proxy support work along with the seccomp2
21491 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
21492 by Francisco Blas Izquierdo Riera.
21493 - Fix a memory leak in tor-resolve when running with the sandbox
21494 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
21496 o Minor bugfixes (logging):
21497 - Downgrade warnings about RSA signature failures to info log level.
21498 Emit a warning when an extra info document is found incompatible
21499 with a corresponding router descriptor. Fixes bug 9812; bugfix
21501 - Make connection_ap_handshake_attach_circuit() log the circuit ID
21502 correctly. Fixes bug 13701; bugfix on 0.0.6.
21504 o Minor bugfixes (misc):
21505 - Stop allowing invalid address patterns like "*/24" that contain
21506 both a wildcard address and a bit prefix length. This affects all
21507 our address-range parsing code. Fixes bug 7484; bugfix
21510 o Minor bugfixes (testing networks, fast startup):
21511 - Allow Tor to build circuits using a consensus with no exits. If
21512 the consensus has no exits (typical of a bootstrapping test
21513 network), allow Tor to build circuits once enough descriptors have
21514 been downloaded. This assists in bootstrapping a testing Tor
21515 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
21517 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
21518 header to directory servers. This allows us to obtain consensuses
21519 promptly when the consensus interval is very short. This assists
21520 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
21521 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
21522 - Stop assuming that private addresses are local when checking
21523 reachability in a TestingTorNetwork. Instead, when testing, assume
21524 all OR connections are remote. (This is necessary due to many test
21525 scenarios running all relays on localhost.) This assists in
21526 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
21527 0.1.0.1-rc. Patch by "teor".
21528 - Avoid building exit circuits from a consensus with no exits. Now
21529 thanks to our fix for 13718, we accept a no-exit network as not
21530 wholly lost, but we need to remember not to try to build exit
21531 circuits on it. Closes ticket 13814; patch by "teor".
21532 - Stop requiring exits to have non-zero bandwithcapacity in a
21533 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
21534 ignore exit bandwidthcapacity. This assists in bootstrapping a
21535 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
21536 on 0.2.0.3-alpha. Patch by "teor".
21537 - Add "internal" to some bootstrap statuses when no exits are
21538 available. If the consensus does not contain Exits, Tor will only
21539 build internal circuits. In this case, relevant statuses will
21540 contain the word "internal" as indicated in the Tor control-
21541 spec.txt. When bootstrap completes, Tor will be ready to build
21542 internal circuits. If a future consensus contains Exits, exit
21543 circuits may become available. Fixes part of bug 13718; bugfix on
21544 0.2.4.10-alpha. Patch by "teor".
21545 - Decrease minimum consensus interval to 10 seconds when
21546 TestingTorNetwork is set, or 5 seconds for the first consensus.
21547 Fix assumptions throughout the code that assume larger intervals.
21548 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
21550 - Avoid excluding guards from path building in minimal test
21551 networks, when we're in a test network and excluding guards would
21552 exclude all relays. This typically occurs in incredibly small tor
21553 networks, and those using "TestingAuthVoteGuard *". Fixes part of
21554 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
21556 o Code simplification and refactoring:
21557 - Stop using can_complete_circuits as a global variable; access it
21558 with a function instead.
21559 - Avoid using operators directly as macro arguments: this lets us
21560 apply coccinelle transformations to our codebase more directly.
21561 Closes ticket 13172.
21562 - Combine the functions used to parse ClientTransportPlugin and
21563 ServerTransportPlugin into a single function. Closes ticket 6456.
21564 - Add inline functions and convenience macros for inspecting channel
21565 state. Refactor the code to use convenience macros instead of
21566 checking channel state directly. Fixes issue 7356.
21567 - Document all members of was_router_added_t and rename
21568 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21569 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21570 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21571 constant instead of hardcoded value. Fixes issue 13840.
21572 - Refactor our generic strmap and digestmap types into a single
21573 implementation, so that we can add a new digest256map
21577 - Document the bridge-authority-only 'networkstatus-bridges' file.
21578 Closes ticket 13713; patch from "tom".
21579 - Fix typo in PredictedPortsRelevanceTime option description in
21580 manpage. Resolves issue 13707.
21581 - Stop suggesting that users specify relays by nickname: it isn't a
21582 good idea. Also, properly cross-reference how to specify relays in
21583 all parts of manual documenting options that take a list of
21584 relays. Closes ticket 13381.
21585 - Clarify the HiddenServiceDir option description in manpage to make
21586 it clear that relative paths are taken with respect to the current
21587 working directory. Also clarify that this behavior is not
21588 guaranteed to remain indefinitely. Fixes issue 13913.
21591 - New tests for many parts of channel, relay, and circuitmux
21592 functionality. Code by Andrea; part of 9262.
21593 - New tests for parse_transport_line(). Part of ticket 6456.
21594 - In the unit tests, use chgrp() to change the group of the unit
21595 test temporary directory to the current user, so that the sticky
21596 bit doesn't interfere with tests that check directory groups.
21598 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
21602 Changes in version 0.2.6.1-alpha - 2014-10-30
21603 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
21604 includes numerous code cleanups and new tests, and fixes a large
21605 number of annoying bugs. Out-of-memory conditions are handled better
21606 than in 0.2.5, pluggable transports have improved proxy support, and
21607 clients now use optimistic data for contacting hidden services. Also,
21608 we are now more robust to changes in what we consider a parseable
21609 directory object, so that tightening restrictions does not have a risk
21610 of introducing infinite download loops.
21612 This is the first alpha release in a new series, so expect there to be
21613 bugs. Users who would rather test out a more stable branch should stay
21614 with 0.2.5.x for now.
21616 o New compiler and system requirements:
21617 - Tor 0.2.6.x requires that your compiler support more of the C99
21618 language standard than before. The 'configure' script now detects
21619 whether your compiler supports C99 mid-block declarations and
21620 designated initializers. If it does not, Tor will not compile.
21622 We may revisit this requirement if it turns out that a significant
21623 number of people need to build Tor with compilers that don't
21624 bother implementing a 15-year-old standard. Closes ticket 13233.
21625 - Tor no longer supports systems without threading support. When we
21626 began working on Tor, there were several systems that didn't have
21627 threads, or where the thread support wasn't able to run the
21628 threads of a single process on multiple CPUs. That no longer
21629 holds: every system where Tor needs to run well now has threading
21630 support. Resolves ticket 12439.
21632 o Removed platform support:
21633 - We no longer include special code to build on Windows CE; as far
21634 as we know, nobody has used Tor on Windows CE in a very long time.
21635 Closes ticket 11446.
21637 o Major features (bridges):
21638 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
21639 transports if they are configured via the "TOR_PT_PROXY"
21640 environment variable. Implements proposal 232. Resolves
21643 o Major features (client performance, hidden services):
21644 - Allow clients to use optimistic data when connecting to a hidden
21645 service, which should remove a round-trip from hidden service
21646 initialization. See proposal 181 for details. Implements
21649 o Major features (directory system):
21650 - Upon receiving an unparseable directory object, if its digest
21651 matches what we expected, then don't try to download it again.
21652 Previously, when we got a descriptor we didn't like, we would keep
21653 trying to download it over and over. Closes ticket 11243.
21655 o Major features (sample torrc):
21656 - Add a new, infrequently-changed "torrc.minimal". This file is
21657 similar to torrc.sample, but it will change as infrequently as
21658 possible, for the benefit of users whose systems prompt them for
21659 intervention whenever a default configuration file is changed.
21660 Making this change allows us to update torrc.sample to be a more
21661 generally useful "sample torrc".
21663 o Major bugfixes (directory authorities):
21664 - Do not assign the HSDir flag to relays if they are not Valid, or
21665 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
21667 o Major bugfixes (directory bandwidth performance):
21668 - Don't flush the zlib buffer aggressively when compressing
21669 directory information for clients. This should save about 7% of
21670 the bandwidth currently used for compressed descriptors and
21671 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
21673 o Minor features (security, memory wiping):
21674 - Ensure we securely wipe keys from memory after
21675 crypto_digest_get_digest and init_curve25519_keypair_from_file
21676 have finished using them. Resolves ticket 13477.
21678 o Minor features (security, out-of-memory handling):
21679 - When handling an out-of-memory condition, allocate less memory for
21680 temporary data structures. Fixes issue 10115.
21681 - When handling an out-of-memory condition, consider more types of
21682 buffers, including those on directory connections, and zlib
21683 buffers. Resolves ticket 11792.
21686 - When identity keypair is generated for first time, log a
21687 congratulatory message that links to the new relay lifecycle
21688 document. Implements feature 10427.
21690 o Minor features (client):
21691 - Clients are now willing to send optimistic data (before they
21692 receive a 'connected' cell) to relays of any version. (Relays
21693 without support for optimistic data are no longer supported on the
21694 Tor network.) Resolves ticket 13153.
21696 o Minor features (directory authorities):
21697 - Don't list relays with a bandwidth estimate of 0 in the consensus.
21698 Implements a feature proposed during discussion of bug 13000.
21699 - In tor-gencert, report an error if the user provides the same
21700 argument more than once.
21701 - If a directory authority can't find a best consensus method in the
21702 votes that it holds, it now falls back to its favorite consensus
21703 method. Previously, it fell back to method 1. Neither of these is
21704 likely to get enough signatures, but "fall back to favorite"
21705 doesn't require us to maintain support an obsolete consensus
21706 method. Implements part of proposal 215.
21708 o Minor features (logging):
21709 - On Unix-like systems, you can now use named pipes as the target of
21710 the Log option, and other options that try to append to files.
21711 Closes ticket 12061. Patch from "carlo von lynX".
21712 - When opening a log file at startup, send it every log message that
21713 we generated between startup and opening it. Previously, log
21714 messages that were generated before opening the log file were only
21715 logged to stdout. Closes ticket 6938.
21716 - Add a TruncateLogFile option to overwrite logs instead of
21717 appending to them. Closes ticket 5583.
21719 o Minor features (portability, Solaris):
21720 - Threads are no longer disabled by default on Solaris; we believe
21721 that the versions of Solaris with broken threading support are all
21722 obsolete by now. Resolves ticket 9495.
21724 o Minor features (relay):
21725 - Re-check our address after we detect a changed IP address from
21726 getsockname(). This ensures that the controller command "GETINFO
21727 address" will report the correct value. Resolves ticket 11582.
21729 - A new AccountingRule option lets Relays set whether they'd like
21730 AccountingMax to be applied separately to inbound and outbound
21731 traffic, or applied to the sum of inbound and outbound traffic.
21732 Resolves ticket 961. Patch by "chobe".
21734 o Minor features (testing networks):
21735 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
21736 the "Exit" flag regardless of their uptime, bandwidth, or exit
21737 policy. TestingTorNetwork must be set for this option to have any
21738 effect. Previously, authorities would take up to 35 minutes to
21739 give nodes the Exit flag in a test network. Partially implements
21742 o Minor features (validation):
21743 - Check all date/time values passed to tor_timegm and
21744 parse_rfc1123_time for validity, taking leap years into account.
21745 Improves HTTP header validation. Implemented with bug 13476.
21746 - In correct_tm(), limit the range of values returned by system
21747 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
21748 This means we don't have to deal with negative or too large dates,
21749 even if a clock is wrong. Otherwise we might fail to read a file
21750 written by us which includes such a date. Fixes bug 13476.
21752 o Minor bugfixes (bridge clients):
21753 - When configured to use a bridge without an identity digest (not
21754 recommended), avoid launching an extra channel to it when
21755 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
21757 o Minor bugfixes (bridges):
21758 - When DisableNetwork is set, do not launch pluggable transport
21759 plugins, and if any are running, terminate them. Fixes bug 13213;
21760 bugfix on 0.2.3.6-alpha.
21762 o Minor bugfixes (C correctness):
21763 - Fix several instances of possible integer overflow/underflow/NaN.
21764 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
21766 - In circuit_build_times_calculate_timeout() in circuitstats.c,
21767 avoid dividing by zero in the pareto calculations. This traps
21768 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
21770 - Fix an integer overflow in format_time_interval(). Fixes bug
21771 13393; bugfix on 0.2.0.10-alpha.
21772 - Set the correct day of year value when the system's localtime(_r)
21773 or gmtime(_r) functions fail to set struct tm. Not externally
21774 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
21775 - Avoid unlikely signed integer overflow in tor_timegm on systems
21776 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
21778 o Minor bugfixes (client):
21779 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
21780 BadExit flag are not considered worthy candidates. Fixes bug
21781 13066; bugfix on 0.1.2.3-alpha.
21782 - Use the consensus schedule for downloading consensuses, and not
21783 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
21784 - Handle unsupported or malformed SOCKS5 requests properly by
21785 responding with the appropriate error message before closing the
21786 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
21788 o Minor bugfixes (client, torrc):
21789 - Stop modifying the value of our DirReqStatistics torrc option just
21790 because we're not a bridge or relay. This bug was causing Tor
21791 Browser users to write "DirReqStatistics 0" in their torrc files
21792 as if they had chosen to change the config. Fixes bug 4244; bugfix
21794 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
21795 that our options have changed every time we SIGHUP. Fixes bug
21796 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
21798 o Minor bugfixes (controller):
21799 - Return an error when the second or later arguments of the
21800 "setevents" controller command are invalid events. Previously we
21801 would return success while silently skipping invalid events. Fixes
21802 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
21804 o Minor bugfixes (directory system):
21805 - Always believe that v3 directory authorities serve extra-info
21806 documents, whether they advertise "caches-extra-info" or not.
21807 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21808 - When running as a v3 directory authority, advertise that you serve
21809 extra-info documents so that clients who want them can find them
21810 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21811 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
21812 Previously, directories offering BRIDGE_DIRINFO and some other
21813 flag (i.e. microdescriptors or extrainfo) would be ignored when
21814 looking for bridges. Partially fixes bug 13163; bugfix
21817 o Minor bugfixes (networking):
21818 - Check for orconns and use connection_or_close_for_error() rather
21819 than connection_mark_for_close() directly in the getsockopt()
21820 failure case of connection_handle_write_impl(). Fixes bug 11302;
21821 bugfix on 0.2.4.4-alpha.
21823 o Minor bugfixes (relay):
21824 - When generating our family list, remove spaces from around the
21825 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
21826 - If our previous bandwidth estimate was 0 bytes, allow publishing a
21827 new relay descriptor immediately. Fixes bug 13000; bugfix
21830 o Minor bugfixes (testing networks):
21831 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
21832 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
21833 - Stop using the default authorities in networks which provide both
21834 AlternateDirAuthority and AlternateBridgeAuthority. Partially
21835 fixes bug 13163; bugfix on 0.2.0.13-alpha.
21837 o Minor bugfixes (testing):
21838 - Stop spawn test failures due to a race condition between the
21839 SIGCHLD handler updating the process status, and the test reading
21840 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
21842 o Minor bugfixes (testing, Windows):
21843 - Avoid passing an extra backslash when creating a temporary
21844 directory for running the unit tests on Windows. Fixes bug 12392;
21845 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
21847 o Minor bugfixes (windows):
21848 - Remove code to special-case handling of NTE_BAD_KEYSET when
21849 acquiring windows CryptoAPI context. This error can't actually
21850 occur for the parameters we're providing. Fixes bug 10816; bugfix
21853 o Minor bugfixes (zlib):
21854 - Avoid truncating a zlib stream when trying to finalize it with an
21855 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
21858 - Allow our configure script to build correctly with autoconf 2.62
21859 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
21860 - Improve the error message from ./configure to make it clear that
21861 when asciidoc has not been found, the user will have to either add
21862 --disable-asciidoc argument or install asciidoc. Resolves
21865 o Code simplification and refactoring:
21866 - Change the entry_is_live() function to take named bitfield
21867 elements instead of an unnamed list of booleans. Closes
21869 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
21870 Resolves ticket 12205.
21871 - Use calloc and reallocarray functions instead of multiply-
21872 then-malloc. This makes it less likely for us to fall victim to an
21873 integer overflow attack when allocating. Resolves ticket 12855.
21874 - Use the standard macro name SIZE_MAX, instead of our
21876 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
21877 functions which take them as arguments. Replace 0 with NO_DIRINFO
21878 in a function call for clarity. Seeks to prevent future issues
21880 - Avoid 4 null pointer errors under clang static analysis by using
21881 tor_assert() to prove that the pointers aren't null. Fixes
21883 - Rework the API of policies_parse_exit_policy() to use a bitmask to
21884 represent parsing options, instead of a confusing mess of
21885 booleans. Resolves ticket 8197.
21886 - Introduce a helper function to parse ExitPolicy in
21887 or_options_t structure.
21890 - Add a doc/TUNING document with tips for handling large numbers of
21891 TCP connections when running busy Tor relay. Update the warning
21892 message to point to this file when running out of sockets
21893 operating system is allowing to use simultaneously. Resolves
21896 o Removed features:
21897 - We no longer remind the user about configuration options that have
21898 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
21899 - Remove our old, non-weighted bandwidth-based node selection code.
21900 Previously, we used it as a fallback when we couldn't perform
21901 weighted bandwidth-based node selection. But that would only
21902 happen in the cases where we had no consensus, or when we had a
21903 consensus generated by buggy or ancient directory authorities. In
21904 either case, it's better to use the more modern, better maintained
21905 algorithm, with reasonable defaults for the weights. Closes
21907 - Remove the --disable-curve25519 configure option. Relays and
21908 clients now are required to support curve25519 and the
21910 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
21911 used to be deprecated synonyms for "StrictNodes", are now marked
21912 obsolete. Resolves ticket 12226.
21913 - Clients don't understand the BadDirectory flag in the consensus
21914 anymore, and ignore it.
21917 - Refactor the function that chooses guard nodes so that it can more
21918 easily be tested; write some tests for it.
21919 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
21920 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
21921 - Create unit tests for format_time_interval(). With bug 13393.
21922 - Add unit tests for tor_timegm signed overflow, tor_timegm and
21923 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
21924 tests (visible) fixes in bug 13476.
21925 - Add a "coverage-html" make target to generate HTML-visualized
21926 coverage results when building with --enable-coverage. (Requires
21927 lcov.) Patch from Kevin Murray.
21928 - Enable the backtrace handler (where supported) when running the
21930 - Revise all unit tests that used the legacy test_* macros to
21931 instead use the recommended tt_* macros. This patch was generated
21932 with coccinelle, to avoid manual errors. Closes ticket 13119.
21934 o Distribution (systemd):
21935 - systemd unit file: only allow tor to write to /var/lib/tor and
21936 /var/log/tor. The rest of the filesystem is accessible for reading
21937 only. Patch by intrigeri; resolves ticket 12751.
21938 - systemd unit file: ensure that the process and all its children
21939 can never gain new privileges. Patch by intrigeri; resolves
21941 - systemd unit file: set up /var/run/tor as writable for the Tor
21942 service. Patch by intrigeri; resolves ticket 13196.
21944 o Removed features (directory authorities):
21945 - Remove code that prevented authorities from listing Tor relays
21946 affected by CVE-2011-2769 as guards. These relays are already
21947 rejected altogether due to the minimum version requirement of
21948 0.2.3.16-alpha. Closes ticket 13152.
21949 - The "AuthDirRejectUnlisted" option no longer has any effect, as
21950 the fingerprints file (approved-routers) has been deprecated.
21951 - Directory authorities do not support being Naming dirauths anymore.
21952 The "NamingAuthoritativeDir" config option is now obsolete.
21953 - Directory authorities do not support giving out the BadDirectory
21955 - Directory authorities no longer advertise or support consensus
21956 methods 1 through 12 inclusive. These consensus methods were
21957 obsolete and/or insecure: maintaining the ability to support them
21958 served no good purpose. Implements part of proposal 215; closes
21961 o Testing (test-network.sh):
21962 - Stop using "echo -n", as some shells' built-in echo doesn't
21963 support "-n". Instead, use "/bin/echo -n". Partially fixes
21965 - Stop an apparent test-network hang when used with make -j2. Fixes
21967 - Add a --delay option to test-network.sh, which configures the
21968 delay before the chutney network tests for data transmission.
21969 Partially implements ticket 13161.
21972 Changes in version 0.2.5.10 - 2014-10-24
21973 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
21975 It adds several new security features, including improved
21976 denial-of-service resistance for relays, new compiler hardening
21977 options, and a system-call sandbox for hardened installations on Linux
21978 (requires seccomp2). The controller protocol has several new features,
21979 resolving IPv6 addresses should work better than before, and relays
21980 should be a little more CPU-efficient. We've added support for more
21981 OpenBSD and FreeBSD transparent proxy types. We've improved the build
21982 system and testing infrastructure to allow unit testing of more parts
21983 of the Tor codebase. Finally, we've addressed several nagging pluggable
21984 transport usability issues, and included numerous other small bugfixes
21985 and features mentioned below.
21987 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
21988 have accumulated many known flaws; everyone should upgrade.
21990 o Deprecated versions:
21991 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
21992 attention for some while.
21995 Changes in version 0.2.5.9-rc - 2014-10-20
21996 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
21997 series. It disables SSL3 in response to the recent "POODLE" attack
21998 (even though POODLE does not affect Tor). It also works around a crash
21999 bug caused by some operating systems' response to the "POODLE" attack
22000 (which does affect Tor). It also contains a few miscellaneous fixes.
22002 o Major security fixes:
22003 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22004 today support TLS 1.0 or later, so we can safely turn off support
22005 for this old (and insecure) protocol. Fixes bug 13426.
22007 o Major bugfixes (openssl bug workaround):
22008 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22009 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22010 13471. This is a workaround for an OpenSSL bug.
22013 - Disable the sandbox name resolver cache when running tor-resolve:
22014 tor-resolve doesn't use the sandbox code, and turning it on was
22015 breaking attempts to do tor-resolve on a non-default server on
22016 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
22018 o Compilation fixes:
22019 - Build and run correctly on systems like OpenBSD-current that have
22020 patched OpenSSL to remove get_cipher_by_char and/or its
22021 implementations. Fixes issue 13325.
22023 o Downgraded warnings:
22024 - Downgrade the severity of the 'unexpected sendme cell from client'
22025 from 'warn' to 'protocol warning'. Closes ticket 8093.
22028 Changes in version 0.2.4.25 - 2014-10-20
22029 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
22030 (even though POODLE does not affect Tor). It also works around a crash
22031 bug caused by some operating systems' response to the "POODLE" attack
22032 (which does affect Tor).
22034 o Major security fixes (also in 0.2.5.9-rc):
22035 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
22036 today support TLS 1.0 or later, so we can safely turn off support
22037 for this old (and insecure) protocol. Fixes bug 13426.
22039 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
22040 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
22041 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
22042 13471. This is a workaround for an OpenSSL bug.
22045 Changes in version 0.2.5.8-rc - 2014-09-22
22046 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
22047 series. It fixes a bug that affects consistency and speed when
22048 connecting to hidden services, and it updates the location of one of
22049 the directory authorities.
22052 - Clients now send the correct address for their chosen rendezvous
22053 point when trying to access a hidden service. They used to send
22054 the wrong address, which would still work some of the time because
22055 they also sent the identity digest of the rendezvous point, and if
22056 the hidden service happened to try connecting to the rendezvous
22057 point from a relay that already had a connection open to it,
22058 the relay would reuse that connection. Now connections to hidden
22059 services should be more robust and faster. Also, this bug meant
22060 that clients were leaking to the hidden service whether they were
22061 on a little-endian (common) or big-endian (rare) system, which for
22062 some users might have reduced their anonymity. Fixes bug 13151;
22063 bugfix on 0.2.1.5-alpha.
22065 o Directory authority changes:
22066 - Change IP address for gabelmoo (v3 directory authority).
22069 Changes in version 0.2.4.24 - 2014-09-22
22070 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
22071 connecting to hidden services, and it updates the location of one of
22072 the directory authorities.
22075 - Clients now send the correct address for their chosen rendezvous
22076 point when trying to access a hidden service. They used to send
22077 the wrong address, which would still work some of the time because
22078 they also sent the identity digest of the rendezvous point, and if
22079 the hidden service happened to try connecting to the rendezvous
22080 point from a relay that already had a connection open to it,
22081 the relay would reuse that connection. Now connections to hidden
22082 services should be more robust and faster. Also, this bug meant
22083 that clients were leaking to the hidden service whether they were
22084 on a little-endian (common) or big-endian (rare) system, which for
22085 some users might have reduced their anonymity. Fixes bug 13151;
22086 bugfix on 0.2.1.5-alpha.
22088 o Directory authority changes:
22089 - Change IP address for gabelmoo (v3 directory authority).
22091 o Minor features (geoip):
22092 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22096 Changes in version 0.2.5.7-rc - 2014-09-11
22097 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
22098 release series, and some long-standing bugs related to ORPort reachability
22099 testing and failure to send CREATE cells. It is the first release
22100 candidate for the Tor 0.2.5.x series.
22102 o Major bugfixes (client, startup):
22103 - Start making circuits as soon as DisabledNetwork is turned off.
22104 When Tor started with DisabledNetwork set, it would correctly
22105 conclude that it shouldn't build circuits, but it would mistakenly
22106 cache this conclusion, and continue believing it even when
22107 DisableNetwork is set to 0. Fixes the bug introduced by the fix
22108 for bug 11200; bugfix on 0.2.5.4-alpha.
22109 - Resume expanding abbreviations for command-line options. The fix
22110 for bug 4647 accidentally removed our hack from bug 586 that
22111 rewrote HashedControlPassword to __HashedControlSessionPassword
22112 when it appears on the commandline (which allowed the user to set
22113 her own HashedControlPassword in the torrc file while the
22114 controller generates a fresh session password for each run). Fixes
22115 bug 12948; bugfix on 0.2.5.1-alpha.
22116 - Warn about attempts to run hidden services and relays in the same
22117 process: that's probably not a good idea. Closes ticket 12908.
22119 o Major bugfixes (relay):
22120 - Avoid queuing or sending destroy cells for circuit ID zero when we
22121 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
22122 Found and fixed by "cypherpunks".
22123 - Fix ORPort reachability detection on relays running behind a
22124 proxy, by correctly updating the "local" mark on the controlling
22125 channel when changing the address of an or_connection_t after the
22126 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
22128 o Minor features (bridge):
22129 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
22130 cookie file for the ExtORPort g+r by default.
22132 o Minor features (geoip):
22133 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
22136 o Minor bugfixes (logging):
22137 - Reduce the log severity of the "Pluggable transport proxy does not
22138 provide any needed transports and will not be launched." message,
22139 since Tor Browser includes several ClientTransportPlugin lines in
22140 its torrc-defaults file, leading every Tor Browser user who looks
22141 at her logs to see these notices and wonder if they're dangerous.
22142 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
22143 - Downgrade "Unexpected onionskin length after decryption" warning
22144 to a protocol-warn, since there's nothing relay operators can do
22145 about a client that sends them a malformed create cell. Resolves
22146 bug 12996; bugfix on 0.0.6rc1.
22147 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
22148 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
22149 - When logging information about an EXTEND2 or EXTENDED2 cell, log
22150 their names correctly. Fixes part of bug 12700; bugfix
22152 - When logging information about a relay cell whose command we don't
22153 recognize, log its command as an integer. Fixes part of bug 12700;
22154 bugfix on 0.2.1.10-alpha.
22155 - Escape all strings from the directory connection before logging
22156 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
22158 o Minor bugfixes (controller):
22159 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
22160 bug 12864; bugfix on 0.2.5.1-alpha.
22161 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
22162 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
22165 o Minor bugfixes (compilation):
22166 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
22167 bugfix on 0.2.5.5-alpha.
22168 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
22169 0.2.5.1-alpha. Patch from "NewEraCracker".
22170 - In routerlist_assert_ok(), don't take the address of a
22171 routerinfo's cache_info member unless that routerinfo is non-NULL.
22172 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
22173 - Fix a large number of false positive warnings from the clang
22174 analyzer static analysis tool. This should make real warnings
22175 easier for clang analyzer to find. Patch from "teor". Closes
22178 o Distribution (systemd):
22179 - Verify configuration file via ExecStartPre in the systemd unit
22180 file. Patch from intrigeri; resolves ticket 12730.
22181 - Explicitly disable RunAsDaemon in the systemd unit file. Our
22182 current systemd unit uses "Type = simple", so systemd does not
22183 expect tor to fork. If the user has "RunAsDaemon 1" in their
22184 torrc, then things won't work as expected. This is e.g. the case
22185 on Debian (and derivatives), since there we pass "--defaults-torrc
22186 /usr/share/tor/tor-service-defaults-torrc" (that contains
22187 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
22191 - Adjust the URLs in the README to refer to the new locations of
22192 several documents on the website. Fixes bug 12830. Patch from
22194 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
22198 Changes in version 0.2.5.6-alpha - 2014-07-28
22199 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
22200 risk from guard rotation, and fixes a variety of other issues to get
22201 us closer to a release candidate.
22203 o Major features (also in 0.2.4.23):
22204 - Make the number of entry guards configurable via a new
22205 NumEntryGuards consensus parameter, and the number of directory
22206 guards configurable via a new NumDirectoryGuards consensus
22207 parameter. Implements ticket 12688.
22209 o Major bugfixes (also in 0.2.4.23):
22210 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22211 implementation that caused incorrect results on 32-bit
22212 implementations when certain malformed inputs were used along with
22213 a small class of private ntor keys. This bug does not currently
22214 appear to allow an attacker to learn private keys or impersonate a
22215 Tor server, but it could provide a means to distinguish 32-bit Tor
22216 implementations from 64-bit Tor implementations. Fixes bug 12694;
22217 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22221 - Perform circuit cleanup operations even when circuit
22222 construction operations are disabled (because the network is
22223 disabled, or because there isn't enough directory information).
22224 Previously, when we were not building predictive circuits, we
22225 were not closing expired circuits either. Fixes bug 8387; bugfix on
22226 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
22227 became more strict about when we have "enough directory information
22228 to build circuits".
22231 - Authorities now assign the Guard flag to the fastest 25% of the
22232 network (it used to be the fastest 50%). Also raise the consensus
22233 weight that guarantees the Guard flag from 250 to 2000. For the
22234 current network, this results in about 1100 guards, down from 2500.
22235 This step paves the way for moving the number of entry guards
22236 down to 1 (proposal 236) while still providing reasonable expected
22237 performance for most users. Implements ticket 12690.
22238 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22240 - Slightly enhance the diagnostic message for bug 12184.
22242 o Minor bugfixes (also in 0.2.4.23):
22243 - Warn and drop the circuit if we receive an inbound 'relay early'
22244 cell. Those used to be normal to receive on hidden service circuits
22245 due to bug 1038, but the buggy Tor versions are long gone from
22246 the network so we can afford to resume watching for them. Resolves
22247 the rest of bug 1038; bugfix on 0.2.1.19.
22248 - Correct a confusing error message when trying to extend a circuit
22249 via the control protocol but we don't know a descriptor or
22250 microdescriptor for one of the specified relays. Fixes bug 12718;
22251 bugfix on 0.2.3.1-alpha.
22254 - Fix compilation when building with bufferevents enabled. (This
22255 configuration is still not expected to work, however.)
22256 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22257 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22259 - Compile correctly with builds and forks of OpenSSL (such as
22260 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22261 0.2.1.1-alpha. Patch from "dhill".
22264 Changes in version 0.2.4.23 - 2014-07-28
22265 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22266 guard rotation, and also backports several important fixes from the
22267 Tor 0.2.5 alpha release series.
22270 - Clients now look at the "usecreatefast" consensus parameter to
22271 decide whether to use CREATE_FAST or CREATE cells for the first hop
22272 of their circuit. This approach can improve security on connections
22273 where Tor's circuit handshake is stronger than the available TLS
22274 connection security levels, but the tradeoff is more computational
22275 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22276 - Make the number of entry guards configurable via a new
22277 NumEntryGuards consensus parameter, and the number of directory
22278 guards configurable via a new NumDirectoryGuards consensus
22279 parameter. Implements ticket 12688.
22282 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22283 implementation that caused incorrect results on 32-bit
22284 implementations when certain malformed inputs were used along with
22285 a small class of private ntor keys. This bug does not currently
22286 appear to allow an attacker to learn private keys or impersonate a
22287 Tor server, but it could provide a means to distinguish 32-bit Tor
22288 implementations from 64-bit Tor implementations. Fixes bug 12694;
22289 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22293 - Warn and drop the circuit if we receive an inbound 'relay early'
22294 cell. Those used to be normal to receive on hidden service circuits
22295 due to bug 1038, but the buggy Tor versions are long gone from
22296 the network so we can afford to resume watching for them. Resolves
22297 the rest of bug 1038; bugfix on 0.2.1.19.
22298 - Correct a confusing error message when trying to extend a circuit
22299 via the control protocol but we don't know a descriptor or
22300 microdescriptor for one of the specified relays. Fixes bug 12718;
22301 bugfix on 0.2.3.1-alpha.
22302 - Avoid an illegal read from stack when initializing the TLS
22303 module using a version of OpenSSL without all of the ciphers
22304 used by the v2 link handshake. Fixes bug 12227; bugfix on
22305 0.2.4.8-alpha. Found by "starlight".
22308 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22312 Changes in version 0.2.5.5-alpha - 2014-06-18
22313 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22314 0.2.5.x release series, including a couple of DoS issues, some
22315 performance regressions, a large number of bugs affecting the Linux
22316 seccomp2 sandbox code, and various other bugfixes. It also adds
22317 diagnostic bugfixes for a few tricky issues that we're trying to
22320 o Major features (security, traffic analysis resistance):
22321 - Several major improvements to the algorithm used to decide when to
22322 close TLS connections. Previous versions of Tor closed connections
22323 at a fixed interval after the last time a non-padding cell was
22324 sent over the connection, regardless of the target of the
22325 connection. Now, we randomize the intervals by adding up to 50% of
22326 their base value, we measure the length of time since connection
22327 last had at least one circuit, and we allow connections to known
22328 ORs to remain open a little longer (15 minutes instead of 3
22329 minutes minimum). These changes should improve Tor's resistance
22330 against some kinds of traffic analysis, and lower some overhead
22331 from needlessly closed connections. Fixes ticket 6799.
22332 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22334 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22335 - Fix a memory leak that could occur if a microdescriptor parse
22336 fails during the tokenizing step. This bug could enable a memory
22337 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22340 o Major bugfixes (security, directory authorities):
22341 - Directory authorities now include a digest of each relay's
22342 identity key as a part of its microdescriptor.
22344 This is a workaround for bug 11743 (reported by "cypherpunks"),
22345 where Tor clients do not support receiving multiple
22346 microdescriptors with the same SHA256 digest in the same
22347 consensus. When clients receive a consensus like this, they only
22348 use one of the relays. Without this fix, a hostile relay could
22349 selectively disable some client use of target relays by
22350 constructing a router descriptor with a different identity and the
22351 same microdescriptor parameters and getting the authorities to
22352 list it in a microdescriptor consensus. This fix prevents an
22353 attacker from causing a microdescriptor collision, because the
22354 router's identity is not forgeable.
22356 o Major bugfixes (relay):
22357 - Use a direct dirport connection when uploading non-anonymous
22358 descriptors to the directory authorities. Previously, relays would
22359 incorrectly use tunnel connections under a fairly wide variety of
22360 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22361 - When a circuit accidentally has the same circuit ID for its
22362 forward and reverse direction, correctly detect the direction of
22363 cells using that circuit. Previously, this bug made roughly one
22364 circuit in a million non-functional. Fixes bug 12195; this is a
22365 bugfix on every version of Tor.
22367 o Major bugfixes (client, pluggable transports):
22368 - When managing pluggable transports, use OS notification facilities
22369 to learn if they have crashed, and don't attempt to kill any
22370 process that has already exited. Fixes bug 8746; bugfix
22373 o Minor features (diagnostic):
22374 - When logging a warning because of bug 7164, additionally check the
22375 hash table for consistency (as proposed on ticket 11737). This may
22376 help diagnose bug 7164.
22377 - When we log a heartbeat, log how many one-hop circuits we have
22378 that are at least 30 minutes old, and log status information about
22379 a few of them. This is an attempt to track down bug 8387.
22380 - When encountering an unexpected CR while writing text to a file on
22381 Windows, log the name of the file. Should help diagnosing
22383 - Give more specific warnings when a client notices that an onion
22384 handshake has failed. Fixes ticket 9635.
22385 - Add significant new logging code to attempt to diagnose bug 12184,
22386 where relays seem to run out of available circuit IDs.
22387 - Improve the diagnostic log message for bug 8387 even further to
22388 try to improve our odds of figuring out why one-hop directory
22389 circuits sometimes do not get closed.
22391 o Minor features (security, memory management):
22392 - Memory allocation tricks (mempools and buffer freelists) are now
22393 disabled by default. You can turn them back on with
22394 --enable-mempools and --enable-buf-freelists respectively. We're
22395 disabling these features because malloc performance is good enough
22396 on most platforms, and a similar feature in OpenSSL exacerbated
22397 exploitation of the Heartbleed attack. Resolves ticket 11476.
22399 o Minor features (security):
22400 - Apply the secure SipHash-2-4 function to the hash table mapping
22401 circuit IDs and channels to circuits. We missed this one when we
22402 were converting all the other hash functions to use SipHash back
22403 in 0.2.5.3-alpha. Resolves ticket 11750.
22405 o Minor features (build):
22406 - The configure script has a --disable-seccomp option to turn off
22407 support for libseccomp on systems that have it, in case it (or
22408 Tor's use of it) is broken. Resolves ticket 11628.
22410 o Minor features (other):
22411 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22414 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22415 - When running a hidden service, do not allow TunneledDirConns 0;
22416 this will keep the hidden service from running, and also
22417 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22418 bugfix on 0.2.1.1-alpha.
22420 o Minor bugfixes (performance):
22421 - Avoid a bug where every successful connection made us recompute
22422 the flag telling us whether we have sufficient information to
22423 build circuits. Previously, we would forget our cached value
22424 whenever we successfully opened a channel (or marked a router as
22425 running or not running for any other reason), regardless of
22426 whether we had previously believed the router to be running. This
22427 forced us to run an expensive update operation far too often.
22428 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22429 - Avoid using tor_memeq() for checking relay cell integrity. This
22430 removes a possible performance bottleneck. Fixes part of bug
22431 12169; bugfix on 0.2.1.31.
22433 o Minor bugfixes (compilation):
22434 - Fix compilation of test_status.c when building with MVSC. Bugfix
22435 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22436 - Resolve GCC complaints on OpenBSD about discarding constness in
22437 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22438 on 0.1.1.23. Patch from Dana Koch.
22439 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22440 treatment of long and time_t as comparable types. Fixes part of
22441 bug 11633. Patch from Dana Koch.
22442 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
22443 11623; bugfix on 0.2.5.3-alpha.
22444 - When deciding whether to build the 64-bit curve25519
22445 implementation, detect platforms where we can compile 128-bit
22446 arithmetic but cannot link it. Fixes bug 11729; bugfix on
22447 0.2.4.8-alpha. Patch from "conradev".
22448 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
22449 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
22450 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
22453 o Minor bugfixes (Directory server):
22454 - When sending a compressed set of descriptors or microdescriptors,
22455 make sure to finalize the zlib stream. Previously, we would write
22456 all the compressed data, but if the last descriptor we wanted to
22457 send was missing or too old, we would not mark the stream as
22458 finished. This caused problems for decompression tools. Fixes bug
22459 11648; bugfix on 0.1.1.23.
22461 o Minor bugfixes (Linux seccomp sandbox):
22462 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
22463 11622; bugfix on 0.2.5.1-alpha.
22464 - Avoid crashing when re-opening listener ports with the seccomp
22465 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
22466 - Avoid crashing with the seccomp sandbox enabled along with
22467 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
22468 - When we receive a SIGHUP with the sandbox enabled, correctly
22469 support rotating our log files. Fixes bug 12032; bugfix
22471 - Avoid crash when running with sandboxing enabled and
22472 DirReqStatistics not disabled. Fixes bug 12035; bugfix
22474 - Fix a "BUG" warning when trying to write bridge-stats files with
22475 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
22477 - Prevent the sandbox from crashing on startup when run with the
22478 --enable-expensive-hardening configuration option. Fixes bug
22479 11477; bugfix on 0.2.5.4-alpha.
22480 - When running with DirPortFrontPage and sandboxing both enabled,
22481 reload the DirPortFrontPage correctly when restarting. Fixes bug
22482 12028; bugfix on 0.2.5.1-alpha.
22483 - Don't try to enable the sandbox when using the Tor binary to check
22484 its configuration, hash a passphrase, or so on. Doing so was
22485 crashing on startup for some users. Fixes bug 11609; bugfix
22487 - Avoid warnings when running with sandboxing and node statistics
22488 enabled at the same time. Fixes part of 12064; bugfix on
22489 0.2.5.1-alpha. Patch from Michael Wolf.
22490 - Avoid warnings when running with sandboxing enabled at the same
22491 time as cookie authentication, hidden services, or directory
22492 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
22493 - Do not allow options that require calls to exec to be enabled
22494 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
22495 bug 12043; bugfix on 0.2.5.1-alpha.
22496 - Handle failures in getpwnam()/getpwuid() when running with the
22497 User option set and the Linux syscall sandbox enabled. Fixes bug
22498 11946; bugfix on 0.2.5.1-alpha.
22499 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
22500 to avoid calling getaddrinfo() after installing the sandbox
22501 filters. Previously, it preloaded a cache with the IPv4 address
22502 for our hostname, and nothing else. Now, it loads the cache with
22503 every address that it used to initialize the Tor process. Fixes
22504 bug 11970; bugfix on 0.2.5.1-alpha.
22506 o Minor bugfixes (pluggable transports):
22507 - Enable the ExtORPortCookieAuthFile option, to allow changing the
22508 default location of the authentication token for the extended OR
22509 Port as used by sever-side pluggable transports. We had
22510 implemented this option before, but the code to make it settable
22511 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
22512 - Avoid another 60-second delay when starting Tor in a pluggable-
22513 transport-using configuration when we already have cached
22514 descriptors for our bridges. Fixes bug 11965; bugfix
22517 o Minor bugfixes (client):
22518 - Avoid "Tried to open a socket with DisableNetwork set" warnings
22519 when starting a client with bridges configured and DisableNetwork
22520 set. (Tor launcher starts Tor with DisableNetwork set the first
22521 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
22523 o Minor bugfixes (testing):
22524 - The Python parts of the test scripts now work on Python 3 as well
22525 as Python 2, so systems where '/usr/bin/python' is Python 3 will
22526 no longer have the tests break. Fixes bug 11608; bugfix
22528 - When looking for versions of python that we could run the tests
22529 with, check for "python2.7" and "python3.3"; previously we were
22530 only looking for "python", "python2", and "python3". Patch from
22531 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
22532 - Fix all valgrind warnings produced by the unit tests. There were
22533 over a thousand memory leak warnings previously, mostly produced
22534 by forgetting to free things in the unit test code. Fixes bug
22535 11618, bugfixes on many versions of Tor.
22537 o Minor bugfixes (tor-fw-helper):
22538 - Give a correct log message when tor-fw-helper fails to launch.
22539 (Previously, we would say something like "tor-fw-helper sent us a
22540 string we could not parse".) Fixes bug 9781; bugfix
22543 o Minor bugfixes (relay, threading):
22544 - Check return code on spawn_func() in cpuworker code, so that we
22545 don't think we've spawned a nonworking cpuworker and write junk to
22546 it forever. Fix related to bug 4345; bugfix on all released Tor
22547 versions. Found by "skruffy".
22548 - Use a pthread_attr to make sure that spawn_func() cannot return an
22549 error while at the same time launching a thread. Fix related to
22550 bug 4345; bugfix on all released Tor versions. Reported
22553 o Minor bugfixes (relay, oom prevention):
22554 - Correctly detect the total available system memory. We tried to do
22555 this in 0.2.5.4-alpha, but the code was set up to always return an
22556 error value, even on success. Fixes bug 11805; bugfix
22559 o Minor bugfixes (relay, other):
22560 - We now drop CREATE cells for already-existent circuit IDs and for
22561 zero-valued circuit IDs, regardless of other factors that might
22562 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22564 - Avoid an illegal read from stack when initializing the TLS module
22565 using a version of OpenSSL without all of the ciphers used by the
22566 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22568 - When rejecting DATA cells for stream_id zero, still count them
22569 against the circuit's deliver window so that we don't fail to send
22570 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22572 o Minor bugfixes (logging):
22573 - Fix a misformatted log message about delayed directory fetches.
22574 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22575 - Squelch a spurious LD_BUG message "No origin circuit for
22576 successful SOCKS stream" in certain hidden service failure cases;
22580 - Include a tor.service file in contrib/dist for use with systemd.
22581 Some distributions will be able to use this file unmodified;
22582 others will need to tweak it, or write their own. Patch from Jamie
22583 Nguyen; resolves ticket 8368.
22586 - Clean up several option names in the manpage to match their real
22587 names, add the missing documentation for a couple of testing and
22588 directory authority options, remove the documentation for a
22589 V2-directory fetching option that no longer exists. Resolves
22591 - Correct the documentation so that it lists the correct directory
22592 for the stats files. (They are in a subdirectory called "stats",
22594 - In the manpage, move more authority-only options into the
22595 directory authority section so that operators of regular directory
22596 caches don't get confused.
22599 - The contrib directory has been sorted and tidied. Before, it was
22600 an unsorted dumping ground for useful and not-so-useful things.
22601 Now, it is divided based on functionality, and the items which
22602 seemed to be nonfunctional or useless have been removed. Resolves
22603 ticket 8966; based on patches from "rl1987".
22606 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
22607 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
22608 - The TunnelDirConns and PreferTunnelledDirConns options no longer
22609 exist; tunneled directory connections have been available since
22610 0.1.2.5-alpha, and turning them off is not a good idea. This is a
22611 brute-force fix for 10849, where "TunnelDirConns 0" would break
22615 Changes in version 0.2.4.22 - 2014-05-16
22616 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
22617 alpha release series. These include blocking all authority signing
22618 keys that may have been affected by the OpenSSL "heartbleed" bug,
22619 choosing a far more secure set of TLS ciphersuites by default, closing
22620 a couple of memory leaks that could be used to run a target relay out
22621 of RAM, and several others.
22623 o Major features (security, backport from 0.2.5.4-alpha):
22624 - Block authority signing keys that were used on authorities
22625 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22626 don't have any evidence that these keys _were_ compromised; we're
22627 doing this to be prudent.) Resolves ticket 11464.
22629 o Major bugfixes (security, OOM):
22630 - Fix a memory leak that could occur if a microdescriptor parse
22631 fails during the tokenizing step. This bug could enable a memory
22632 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22635 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
22636 - The relay ciphersuite list is now generated automatically based on
22637 uniform criteria, and includes all OpenSSL ciphersuites with
22638 acceptable strength and forward secrecy. Previously, we had left
22639 some perfectly fine ciphersuites unsupported due to omission or
22640 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22641 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22642 - Relays now trust themselves to have a better view than clients of
22643 which TLS ciphersuites are better than others. (Thanks to bug
22644 11513, the relay list is now well-considered, whereas the client
22645 list has been chosen mainly for anti-fingerprinting purposes.)
22646 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22647 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22648 AES128. Resolves ticket 11528.
22649 - Clients now try to advertise the same list of ciphersuites as
22650 Firefox 28. This change enables selection of (fast) GCM
22651 ciphersuites, disables some strange old ciphers, and stops
22652 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22653 Resolves ticket 11438.
22655 o Minor bugfixes (configuration, security):
22656 - When running a hidden service, do not allow TunneledDirConns 0:
22657 trying to set that option together with a hidden service would
22658 otherwise prevent the hidden service from running, and also make
22659 it publish its descriptors directly over HTTP. Fixes bug 10849;
22660 bugfix on 0.2.1.1-alpha.
22662 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
22663 - Avoid sending a garbage value to the controller when a circuit is
22664 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22666 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
22667 - Stop leaking memory when we successfully resolve a PTR record.
22668 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22670 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
22671 - Avoid 60-second delays in the bootstrapping process when Tor is
22672 launching for a second time while using bridges. Fixes bug 9229;
22673 bugfix on 0.2.0.3-alpha.
22675 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
22676 - Give the correct URL in the warning message when trying to run a
22677 relay on an ancient version of Windows. Fixes bug 9393.
22679 o Minor bugfixes (compilation):
22680 - Fix a compilation error when compiling with --disable-curve25519.
22681 Fixes bug 9700; bugfix on 0.2.4.17-rc.
22684 - Downgrade the warning severity for the the "md was still
22685 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
22686 for trying to diagnose this bug, and the current warning in
22687 earlier versions of tor achieves nothing useful. Addresses warning
22690 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
22691 - When we run out of usable circuit IDs on a channel, log only one
22692 warning for the whole channel, and describe how many circuits
22693 there were on the channel. Fixes part of ticket 11553.
22695 o Minor features (security, backport from 0.2.5.4-alpha):
22696 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
22697 leave the default at 8GBytes), to better support Raspberry Pi
22698 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
22700 o Documentation (backport from 0.2.5.4-alpha):
22701 - Correctly document that we search for a system torrc file before
22702 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22706 Changes in version 0.2.5.4-alpha - 2014-04-25
22707 Tor 0.2.5.4-alpha includes several security and performance
22708 improvements for clients and relays, including blacklisting authority
22709 signing keys that were used while susceptible to the OpenSSL
22710 "heartbleed" bug, fixing two expensive functions on busy relays,
22711 improved TLS ciphersuite preference lists, support for run-time
22712 hardening on compilers that support AddressSanitizer, and more work on
22713 the Linux sandbox code.
22715 There are also several usability fixes for clients (especially clients
22716 that use bridges), two new TransPort protocols supported (one on
22717 OpenBSD, one on FreeBSD), and various other bugfixes.
22719 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
22720 have accumulated many known flaws; everyone should upgrade.
22722 o Major features (security):
22723 - If you don't specify MaxMemInQueues yourself, Tor now tries to
22724 pick a good value based on your total system memory. Previously,
22725 the default was always 8 GB. You can still override the default by
22726 setting MaxMemInQueues yourself. Resolves ticket 11396.
22727 - Block authority signing keys that were used on authorities
22728 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22729 don't have any evidence that these keys _were_ compromised; we're
22730 doing this to be prudent.) Resolves ticket 11464.
22732 o Major features (relay performance):
22733 - Speed up server-side lookups of rendezvous and introduction point
22734 circuits by using hashtables instead of linear searches. These
22735 functions previously accounted between 3 and 7% of CPU usage on
22736 some busy relays. Resolves ticket 9841.
22737 - Avoid wasting CPU when extending a circuit over a channel that is
22738 nearly out of circuit IDs. Previously, we would do a linear scan
22739 over possible circuit IDs before finding one or deciding that we
22740 had exhausted our possibilities. Now, we try at most 64 random
22741 circuit IDs before deciding that we probably won't succeed. Fixes
22742 a possible root cause of ticket 11553.
22744 o Major features (seccomp2 sandbox, Linux only):
22745 - The seccomp2 sandbox can now run a test network for multiple hours
22746 without crashing. The sandbox is still experimental, and more bugs
22747 will probably turn up. To try it, enable "Sandbox 1" on a Linux
22748 host. Resolves ticket 11351.
22749 - Strengthen sandbox code: the sandbox can now test the arguments
22750 for rename(), and blocks _sysctl() entirely. Resolves another part
22752 - When the sandbox blocks a system call, it now tries to log a stack
22753 trace before exiting. Resolves ticket 11465.
22755 o Major bugfixes (TLS cipher selection):
22756 - The relay ciphersuite list is now generated automatically based on
22757 uniform criteria, and includes all OpenSSL ciphersuites with
22758 acceptable strength and forward secrecy. Previously, we had left
22759 some perfectly fine ciphersuites unsupported due to omission or
22760 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22761 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22762 - Relays now trust themselves to have a better view than clients of
22763 which TLS ciphersuites are better than others. (Thanks to bug
22764 11513, the relay list is now well-considered, whereas the client
22765 list has been chosen mainly for anti-fingerprinting purposes.)
22766 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22767 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22768 AES128. Resolves ticket 11528.
22769 - Clients now try to advertise the same list of ciphersuites as
22770 Firefox 28. This change enables selection of (fast) GCM
22771 ciphersuites, disables some strange old ciphers, and stops
22772 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22773 Resolves ticket 11438.
22775 o Major bugfixes (bridge client):
22776 - Avoid 60-second delays in the bootstrapping process when Tor is
22777 launching for a second time while using bridges. Fixes bug 9229;
22778 bugfix on 0.2.0.3-alpha.
22780 o Minor features (transparent proxy, *BSD):
22781 - Support FreeBSD's ipfw firewall interface for TransPort ports on
22782 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
22783 10267; patch from "yurivict".
22784 - Support OpenBSD's divert-to rules with the pf firewall for
22785 transparent proxy ports. To enable it, set "TransProxyType
22786 pf-divert". This allows Tor to run a TransPort transparent proxy
22787 port on OpenBSD 4.4 or later without root privileges. See the
22788 pf.conf(5) manual page for information on configuring pf to use
22789 divert-to rules. Closes ticket 10896; patch from Dana Koch.
22791 o Minor features (security):
22792 - New --enable-expensive-hardening option to enable security
22793 hardening options that consume nontrivial amounts of CPU and
22794 memory. Right now, this includes AddressSanitizer and UbSan, which
22795 are supported in newer versions of GCC and Clang. Closes ticket
22798 o Minor features (log verbosity):
22799 - Demote the message that we give when a flushing connection times
22800 out for too long from NOTICE to INFO. It was usually meaningless.
22801 Resolves ticket 5286.
22802 - Don't log so many notice-level bootstrapping messages at startup
22803 about downloading descriptors. Previously, we'd log a notice
22804 whenever we learned about more routers. Now, we only log a notice
22805 at every 5% of progress. Fixes bug 9963.
22806 - Warn less verbosely when receiving a malformed
22807 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
22808 - When we run out of usable circuit IDs on a channel, log only one
22809 warning for the whole channel, and describe how many circuits
22810 there were on the channel. Fixes part of ticket 11553.
22812 o Minor features (relay):
22813 - If a circuit timed out for at least 3 minutes, check if we have a
22814 new external IP address, and publish a new descriptor with the new
22815 IP address if it changed. Resolves ticket 2454.
22817 o Minor features (controller):
22818 - Make the entire exit policy available from the control port via
22819 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
22821 - Because of the fix for ticket 11396, the real limit for memory
22822 usage may no longer match the configured MaxMemInQueues value. The
22823 real limit is now exposed via GETINFO limits/max-mem-in-queues.
22825 o Minor features (bridge client):
22826 - Report a more useful failure message when we can't connect to a
22827 bridge because we don't have the right pluggable transport
22828 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
22830 o Minor features (diagnostic):
22831 - Add more log messages to diagnose bug 7164, which causes
22832 intermittent "microdesc_free() called but md was still referenced"
22833 warnings. We now include more information, to figure out why we
22834 might be cleaning a microdescriptor for being too old if it's
22835 still referenced by a live node_t object.
22837 o Minor bugfixes (client, DNSPort):
22838 - When using DNSPort, try to respond to AAAA requests with AAAA
22839 answers. Previously, we hadn't looked at the request type when
22840 deciding which answer type to prefer. Fixes bug 10468; bugfix on
22842 - When receiving a DNS query for an unsupported record type, reply
22843 with no answer rather than with a NOTIMPL error. This behavior
22844 isn't correct either, but it will break fewer client programs, we
22845 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
22848 o Minor bugfixes (exit relay):
22849 - Stop leaking memory when we successfully resolve a PTR record.
22850 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22852 o Minor bugfixes (bridge client):
22853 - Stop accepting bridge lines containing hostnames. Doing so would
22854 cause clients to perform DNS requests on the hostnames, which was
22855 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
22856 - Avoid a 60-second delay in the bootstrapping process when a Tor
22857 client with pluggable transports re-reads its configuration at
22858 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
22860 o Minor bugfixes (client, logging during bootstrap):
22861 - Warn only once if we start logging in an unsafe way. Previously,
22862 we complain as many times as we had problems. Fixes bug 9870;
22863 bugfix on 0.2.5.1-alpha.
22864 - Only report the first fatal bootstrap error on a given OR
22865 connection. This stops us from telling the controller bogus error
22866 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
22867 - Be more helpful when trying to run sandboxed on Linux without
22868 libseccomp. Instead of saying "Sandbox is not implemented on this
22869 platform", we now explain that we need to be built with
22870 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
22871 - Avoid generating spurious warnings when starting with
22872 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
22875 o Minor bugfixes (closing OR connections):
22876 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
22877 check if it's an or_connection_t and correctly call
22878 connection_or_close_for_error() rather than
22879 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
22881 - When closing all connections on setting DisableNetwork to 1, use
22882 connection_or_close_normally() rather than closing OR connections
22883 out from under the channel layer. Fixes bug 11306; bugfix on
22886 o Minor bugfixes (controller):
22887 - Avoid sending a garbage value to the controller when a circuit is
22888 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22890 o Minor bugfixes (tor-fw-helper):
22891 - Allow tor-fw-helper to build again by adding src/ext to its
22892 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
22894 o Minor bugfixes (bridges):
22895 - Avoid potential crashes or bad behavior when launching a
22896 server-side managed proxy with ORPort or ExtORPort temporarily
22897 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
22899 o Minor bugfixes (platform-specific):
22900 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
22901 bug 11426; bugfix on 0.2.5.3-alpha.
22902 - When dumping a malformed directory object to disk, save it in
22903 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
22905 - Don't report failures from make_socket_reuseable() on incoming
22906 sockets on OSX: this can happen when incoming connections close
22907 early. Fixes bug 10081.
22909 o Minor bugfixes (trivial memory leaks):
22910 - Fix a small memory leak when signing a directory object. Fixes bug
22911 11275; bugfix on 0.2.4.13-alpha.
22912 - Free placeholder entries in our circuit table at exit; fixes a
22913 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
22914 - Don't re-initialize a second set of OpenSSL mutexes when starting
22915 up. Previously, we'd make one set of mutexes, and then immediately
22916 replace them with another. Fixes bug 11726; bugfix on
22918 - Resolve some memory leaks found by coverity in the unit tests, on
22919 exit in tor-gencert, and on a failure to compute digests for our
22920 own keys when generating a v3 networkstatus vote. These leaks
22921 should never have affected anyone in practice.
22923 o Minor bugfixes (hidden service):
22924 - Only retry attempts to connect to a chosen rendezvous point 8
22925 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
22927 o Minor bugfixes (misc code correctness):
22928 - Fix various instances of undefined behavior in channeltls.c,
22929 tor_memmem(), and eventdns.c that would cause us to construct
22930 pointers to memory outside an allocated object. (These invalid
22931 pointers were not accessed, but C does not even allow them to
22932 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
22933 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
22934 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
22935 fix some miscellaneous errors in our tests and codebase. Fixes bug
22936 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
22937 - Always check return values for unlink, munmap, UnmapViewOfFile;
22938 check strftime return values more often. In some cases all we can
22939 do is report a warning, but this may help prevent deeper bugs from
22940 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
22942 - Fix numerous warnings from the clang "scan-build" static analyzer.
22943 Some of these are programming style issues; some of them are false
22944 positives that indicated awkward code; some are undefined behavior
22945 cases related to constructing (but not using) invalid pointers;
22946 some are assumptions about API behavior; some are (harmlessly)
22947 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
22948 correct; and one or two are genuine bugs that weren't reachable
22949 from the rest of the program. Fixes bug 8793; bugfixes on many,
22953 - Build the torify.1 manpage again. Previously, we were only trying
22954 to build it when also building tor-fw-helper. That's why we didn't
22955 notice that we'd broken the ability to build it. Fixes bug 11321;
22956 bugfix on 0.2.5.1-alpha.
22957 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
22958 11061; bugfix on 0.2.4.7-alpha.
22959 - Correctly document that we search for a system torrc file before
22960 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22962 - Resolve warnings from Doxygen.
22964 o Code simplifications and refactoring:
22965 - Remove is_internal_IP() function. Resolves ticket 4645.
22966 - Remove unused function circuit_dump_by_chan from circuitlist.c.
22967 Closes issue 9107; patch from "marek".
22968 - Change our use of the ENUM_BF macro to avoid declarations that
22971 o Deprecated versions:
22972 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
22973 attention for some while. Directory authorities no longer accept
22974 descriptors from relays running any version of Tor prior to Tor
22975 0.2.3.16-alpha. Resolves ticket 11149.
22978 - New macros in test.h to simplify writing mock-functions for unit
22979 tests. Part of ticket 11507. Patch from Dana Koch.
22980 - Complete tests for the status.c module. Resolves ticket 11507.
22981 Patch from Dana Koch.
22984 - Remove all code for the long unused v1 directory protocol.
22985 Resolves ticket 11070.
22988 Changes in version 0.2.5.3-alpha - 2014-03-22
22989 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
22990 two new anti-DoS features for Tor relays, resolves a bug that kept
22991 SOCKS5 support for IPv6 from working, fixes several annoying usability
22992 issues for bridge users, and removes more old code for unused
22995 The Tor 0.2.5.x release series is now in patch-freeze: no feature
22996 patches not already written will be considered for inclusion in 0.2.5.x.
22998 o Major features (relay security, DoS-resistance):
22999 - When deciding whether we have run out of memory and we need to
23000 close circuits, also consider memory allocated in buffers for
23001 streams attached to each circuit.
23003 This change, which extends an anti-DoS feature introduced in
23004 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
23005 better resist more memory-based DoS attacks than before. Since the
23006 MaxMemInCellQueues option now applies to all queues, it is renamed
23007 to MaxMemInQueues. This feature fixes bug 10169.
23008 - Avoid hash-flooding denial-of-service attacks by using the secure
23009 SipHash-2-4 hash function for our hashtables. Without this
23010 feature, an attacker could degrade performance of a targeted
23011 client or server by flooding their data structures with a large
23012 number of entries to be stored at the same hash table position,
23013 thereby slowing down the Tor instance. With this feature, hash
23014 table positions are derived from a randomized cryptographic key,
23015 and an attacker cannot predict which entries will collide. Closes
23017 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
23018 the default at 8GBytes), to better support Raspberry Pi users. Fixes
23019 bug 9686; bugfix on 0.2.4.14-alpha.
23021 o Minor features (bridges, pluggable transports):
23022 - Bridges now write the SHA1 digest of their identity key
23023 fingerprint (that is, a hash of a hash of their public key) to
23024 notice-level logs, and to a new hashed-fingerprint file. This
23025 information will help bridge operators look up their bridge in
23026 Globe and similar tools. Resolves ticket 10884.
23027 - Improve the message that Tor displays when running as a bridge
23028 using pluggable transports without an Extended ORPort listener.
23029 Also, log the message in the log file too. Resolves ticket 11043.
23031 o Minor features (other):
23032 - Add a new option, PredictedPortsRelevanceTime, to control how long
23033 after having received a request to connect to a given port Tor
23034 will try to keep circuits ready in anticipation of future requests
23035 for that port. Patch from "unixninja92"; implements ticket 9176.
23036 - Generate a warning if any ports are listed in the SocksPolicy,
23037 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
23038 AuthDirBadExit options. (These options only support address
23039 ranges.) Fixes part of ticket 11108.
23040 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
23043 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
23044 - Build without warnings under clang 3.4. (We have some macros that
23045 define static functions only some of which will get used later in
23046 the module. Starting with clang 3.4, these give a warning unless the
23047 unused attribute is set on them.) Resolves ticket 10904.
23048 - Fix build warnings about missing "a2x" comment when building the
23049 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23050 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23052 o Minor bugfixes (client):
23053 - Improve the log message when we can't connect to a hidden service
23054 because all of the hidden service directory nodes hosting its
23055 descriptor are excluded. Improves on our fix for bug 10722, which
23056 was a bugfix on 0.2.0.10-alpha.
23057 - Raise a control port warning when we fail to connect to all of
23058 our bridges. Previously, we didn't inform the controller, and
23059 the bootstrap process would stall. Fixes bug 11069; bugfix on
23061 - Exit immediately when a process-owning controller exits.
23062 Previously, tor relays would wait for a little while after their
23063 controller exited, as if they had gotten an INT signal -- but this
23064 was problematic, since there was no feedback for the user. To do a
23065 clean shutdown, controllers should send an INT signal and give Tor
23066 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
23067 - Stop attempting to connect to bridges before our pluggable
23068 transports are configured (harmless but resulted in some erroneous
23069 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
23070 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
23071 generating incorrect SOCKS5 responses, and confusing client
23072 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
23074 o Minor bugfixes (relays and bridges):
23075 - Avoid crashing on a malformed resolv.conf file when running a
23076 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
23077 - Non-exit relays no longer launch mock DNS requests to check for
23078 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
23079 non-exit relays stopped servicing DNS requests. Fixes bug 965;
23080 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
23081 - Bridges now report complete directory request statistics. Related
23082 to bug 5824; bugfix on 0.2.2.1-alpha.
23083 - Bridges now never collect statistics that were designed for
23084 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
23085 - Stop giving annoying warning messages when we decide not to launch
23086 a pluggable transport proxy that we don't need (because there are
23087 no bridges configured to use it). Resolves ticket 5018; bugfix
23089 - Give the correct URL in the warning message when trying to run a
23090 relay on an ancient version of Windows. Fixes bug 9393.
23092 o Minor bugfixes (backtrace support):
23093 - Support automatic backtraces on more platforms by using the
23094 "-fasynchronous-unwind-tables" compiler option. This option is
23095 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
23096 is on by default and table generation is not. This doesn't yet
23097 add Windows support; only Linux, OSX, and some BSDs are affected.
23098 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
23099 - Avoid strange behavior if two threads hit failed assertions at the
23100 same time and both try to log backtraces at once. (Previously, if
23101 this had happened, both threads would have stored their intermediate
23102 results in the same buffer, and generated junk outputs.) Reported by
23103 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
23104 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
23105 0.2.5.2-alpha; patch from Nick Hopper.
23107 o Minor bugfixes (unit tests):
23108 - Fix a small bug in the unit tests that might have made the tests
23109 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
23110 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
23113 - Remove all remaining code related to version-0 hidden service
23114 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
23115 the rest of bug 10841.
23118 - Document in the manpage that "KBytes" may also be written as
23119 "kilobytes" or "KB", that "Kbits" may also be written as
23120 "kilobits", and so forth. Closes ticket 9222.
23121 - Document that the ClientOnly config option overrides ORPort.
23122 Our old explanation made ClientOnly sound as though it did
23123 nothing at all. Resolves bug 9059.
23124 - Explain that SocksPolicy, DirPolicy, and similar options don't
23125 take port arguments. Fixes the other part of ticket 11108.
23126 - Fix a comment about the rend_server_descriptor_t.protocols field
23127 to more accurately describe its range. Also, make that field
23128 unsigned, to more accurately reflect its usage. Fixes bug 9099;
23129 bugfix on 0.2.1.5-alpha.
23130 - Fix the manpage's description of HiddenServiceAuthorizeClient:
23131 the maximum client name length is 16, not 19. Fixes bug 11118;
23132 bugfix on 0.2.1.6-alpha.
23134 o Code simplifications and refactoring:
23135 - Get rid of router->address, since in all cases it was just the
23136 string representation of router->addr. Resolves ticket 5528.
23138 o Test infrastructure:
23139 - Update to the latest version of tinytest.
23140 - Improve the tinytest implementation of string operation tests so
23141 that comparisons with NULL strings no longer crash the tests; they
23142 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
23145 Changes in version 0.2.4.21 - 2014-02-28
23146 Tor 0.2.4.21 further improves security against potential adversaries who
23147 find breaking 1024-bit crypto doable, and backports several stability
23148 and robustness patches from the 0.2.5 branch.
23150 o Major features (client security):
23151 - When we choose a path for a 3-hop circuit, make sure it contains
23152 at least one relay that supports the NTor circuit extension
23153 handshake. Otherwise, there is a chance that we're building
23154 a circuit that's worth attacking by an adversary who finds
23155 breaking 1024-bit crypto doable, and that chance changes the game
23156 theory. Implements ticket 9777.
23159 - Do not treat streams that fail with reason
23160 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23161 since it could also indicate an ENETUNREACH connection error. Fixes
23162 part of bug 10777; bugfix on 0.2.4.8-alpha.
23164 o Code simplification and refactoring:
23165 - Remove data structures which were introduced to implement the
23166 CellStatistics option: they are now redundant with the new timestamp
23167 field in the regular packed_cell_t data structure, which we did
23168 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
23171 - Always clear OpenSSL bignums before freeing them -- even bignums
23172 that don't contain secrets. Resolves ticket 10793. Patch by
23174 - Build without warnings under clang 3.4. (We have some macros that
23175 define static functions only some of which will get used later in
23176 the module. Starting with clang 3.4, these give a warning unless the
23177 unused attribute is set on them.) Resolves ticket 10904.
23178 - Update geoip and geoip6 files to the February 7 2014 Maxmind
23179 GeoLite2 Country database.
23182 - Set the listen() backlog limit to the largest actually supported
23183 on the system, not to the value in a header file. Fixes bug 9716;
23184 bugfix on every released Tor.
23185 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23186 exit node as a NOROUTE error, not an INTERNAL error, since they
23187 can apparently happen when trying to connect to the wrong sort
23188 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23189 - Fix build warnings about missing "a2x" comment when building the
23190 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
23191 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
23192 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23193 not entirely remove it from the connection lists. Fixes bug 9602;
23194 bugfix on 0.2.4.4-alpha.
23195 - Fix a segmentation fault in our benchmark code when running with
23196 Fedora's OpenSSL package, or any other OpenSSL that provides
23197 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23198 - Turn "circuit handshake stats since last time" log messages into a
23199 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23201 o Documentation fixes:
23202 - Document that all but one DirPort entry must have the NoAdvertise
23203 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23206 Changes in version 0.2.5.2-alpha - 2014-02-13
23207 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
23208 like the "poor random number generation" fix and the "building too many
23209 circuits" fix. It also further improves security against potential
23210 adversaries who find breaking 1024-bit crypto doable, and launches
23211 pluggable transports on demand (which gets us closer to integrating
23212 pluggable transport support by default -- not to be confused with Tor
23213 bundles enabling pluggable transports and bridges by default).
23215 o Major features (client security):
23216 - When we choose a path for a 3-hop circuit, make sure it contains
23217 at least one relay that supports the NTor circuit extension
23218 handshake. Otherwise, there is a chance that we're building
23219 a circuit that's worth attacking by an adversary who finds
23220 breaking 1024-bit crypto doable, and that chance changes the game
23221 theory. Implements ticket 9777.
23222 - Clients now look at the "usecreatefast" consensus parameter to
23223 decide whether to use CREATE_FAST or CREATE cells for the first hop
23224 of their circuit. This approach can improve security on connections
23225 where Tor's circuit handshake is stronger than the available TLS
23226 connection security levels, but the tradeoff is more computational
23227 load on guard relays. Implements proposal 221. Resolves ticket 9386.
23229 o Major features (bridges):
23230 - Don't launch pluggable transport proxies if we don't have any
23231 bridges configured that would use them. Now we can list many
23232 pluggable transports, and Tor will dynamically start one when it
23233 hears a bridge address that needs it. Resolves ticket 5018.
23234 - The bridge directory authority now assigns status flags (Stable,
23235 Guard, etc) to bridges based on thresholds calculated over all
23236 Running bridges. Now bridgedb can finally make use of its features
23237 to e.g. include at least one Stable bridge in its answers. Fixes
23240 o Major features (other):
23241 - Extend ORCONN controller event to include an "ID" parameter,
23242 and add four new controller event types CONN_BW, CIRC_BW,
23243 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23244 The new events are emitted in private Tor networks only, with the
23245 goal of being able to better track performance and load during
23246 full-network simulations. Implements proposal 218 and ticket 7359.
23247 - On some platforms (currently: recent OSX versions, glibc-based
23248 platforms that support the ELF format, and a few other
23249 Unix-like operating systems), Tor can now dump stack traces
23250 when a crash occurs or an assertion fails. By default, traces
23251 are dumped to stderr (if possible) and to any logs that are
23252 reporting errors. Implements ticket 9299.
23255 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23256 not entirely remove it from the connection lists. Fixes bug 9602;
23257 bugfix on 0.2.4.4-alpha.
23258 - Do not treat streams that fail with reason
23259 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23260 since it could also indicate an ENETUNREACH connection error. Fixes
23261 part of bug 10777; bugfix on 0.2.4.8-alpha.
23263 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23264 - Do not allow OpenSSL engines to replace the PRNG, even when
23265 HardwareAccel is set. The only default builtin PRNG engine uses
23266 the Intel RDRAND instruction to replace the entire PRNG, and
23267 ignores all attempts to seed it with more entropy. That's
23268 cryptographically stupid: the right response to a new alleged
23269 entropy source is never to discard all previously used entropy
23270 sources. Fixes bug 10402; works around behavior introduced in
23271 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23273 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23274 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23275 - Avoid launching spurious extra circuits when a stream is pending.
23276 This fixes a bug where any circuit that _wasn't_ unusable for new
23277 streams would be treated as if it were, causing extra circuits to
23278 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23280 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23281 - No longer stop reading or writing on cpuworker connections when
23282 our rate limiting buckets go empty. Now we should handle circuit
23283 handshake requests more promptly. Resolves bug 9731.
23284 - Stop trying to bootstrap all our directory information from
23285 only our first guard. Discovered while fixing bug 9946; bugfix
23288 o Minor features (bridges, pluggable transports):
23289 - Add threshold cutoffs to the networkstatus document created by
23290 the Bridge Authority. Fixes bug 1117.
23291 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23292 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23293 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23294 Vidalia set this option for us.) Implements ticket 10297.
23296 o Minor features (security):
23297 - Always clear OpenSSL bignums before freeing them -- even bignums
23298 that don't contain secrets. Resolves ticket 10793. Patch by
23301 o Minor features (config options and command line):
23302 - Add an --allow-missing-torrc commandline option that tells Tor to
23303 run even if the configuration file specified by -f is not available.
23304 Implements ticket 10060.
23305 - Add support for the TPROXY transparent proxying facility on Linux.
23306 See documentation for the new TransProxyType option for more
23307 details. Implementation by "thomo". Closes ticket 10582.
23309 o Minor features (controller):
23310 - Add a new "HS_DESC" controller event that reports activities
23311 related to hidden service descriptors. Resolves ticket 8510.
23312 - New "DROPGUARDS" controller command to forget all current entry
23313 guards. Not recommended for ordinary use, since replacing guards
23314 too frequently makes several attacks easier. Resolves ticket 9934;
23317 o Minor features (build):
23318 - Assume that a user using ./configure --host wants to cross-compile,
23319 and give an error if we cannot find a properly named
23320 tool-chain. Add a --disable-tool-name-check option to proceed
23321 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23322 - If we run ./configure and the compiler recognizes -fstack-protector
23323 but the linker rejects it, warn the user about a potentially missing
23324 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23326 o Minor features (testing):
23327 - If Python is installed, "make check" now runs extra tests beyond
23328 the unit test scripts.
23329 - When bootstrapping a test network, sometimes very few relays get
23330 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23331 specify a set of relays which should be voted Guard regardless of
23332 their uptime or bandwidth. Addresses ticket 9206.
23334 o Minor features (log messages):
23335 - When ServerTransportPlugin is set on a bridge, Tor can write more
23336 useful statistics about bridge use in its extrainfo descriptors,
23337 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23338 log message to inform the user in this case. Resolves ticket 9651.
23339 - When receiving a new controller connection, log the origin address.
23340 Resolves ticket 9698; patch from "sigpipe".
23341 - When logging OpenSSL engine status at startup, log the status of
23342 more engines. Fixes ticket 10043; patch from Joshua Datko.
23343 - Turn "circuit handshake stats since last time" log messages into a
23344 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23346 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23347 - Improve the circuit queue out-of-memory handler. Previously, when
23348 we ran low on memory, we'd close whichever circuits had the most
23349 queued cells. Now, we close those that have the *oldest* queued
23350 cells, on the theory that those are most responsible for us
23351 running low on memory. Based on analysis from a forthcoming paper
23352 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23353 - Generate bootstrapping status update events correctly when fetching
23354 microdescriptors. Fixes bug 9927.
23355 - Update to the October 2 2013 Maxmind GeoLite Country database.
23357 o Minor bugfixes (clients):
23358 - When closing a channel that has already been open, do not close
23359 pending circuits that were waiting to connect to the same relay.
23360 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23363 o Minor bugfixes (relays):
23364 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23365 exit node as a NOROUTE error, not an INTERNAL error, since they
23366 can apparently happen when trying to connect to the wrong sort
23367 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23369 o Minor bugfixes (bridges):
23370 - Fix a bug where the first connection works to a bridge that uses a
23371 pluggable transport with client-side parameters, but we don't send
23372 the client-side parameters on subsequent connections. (We don't
23373 use any pluggable transports with client-side parameters yet,
23374 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23375 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23377 o Minor bugfixes (node selection):
23378 - If ExcludeNodes is set, consider non-excluded hidden service
23379 directory servers before excluded ones. Do not consider excluded
23380 hidden service directory servers at all if StrictNodes is
23381 set. (Previously, we would sometimes decide to connect to those
23382 servers, and then realize before we initiated a connection that
23383 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23384 Reported by "mr-4".
23385 - If we set the ExitNodes option but it doesn't include any nodes
23386 that have the Exit flag, we would choose not to bootstrap. Now we
23387 bootstrap so long as ExitNodes includes nodes which can exit to
23388 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23390 o Minor bugfixes (controller and command-line):
23391 - If changing a config option via "setconf" fails in a recoverable
23392 way, we used to nonetheless write our new control ports to the
23393 file described by the "ControlPortWriteToFile" option. Now we only
23394 write out that file if we successfully switch to the new config
23395 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23396 - When a command-line option such as --version or --help that
23397 ordinarily implies --hush appears on the command line along with
23398 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23399 only if it appeared later on the command line. Fixes bug 9578;
23400 bugfix on 0.2.5.1-alpha.
23402 o Minor bugfixes (code correctness):
23403 - Previously we used two temporary files when writing descriptors to
23404 disk; now we only use one. Fixes bug 1376.
23405 - Remove an erroneous (but impossible and thus harmless) pointer
23406 comparison that would have allowed compilers to skip a bounds
23407 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23408 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23409 - Fix an always-true assertion in pluggable transports code so it
23410 actually checks what it was trying to check. Fixes bug 10046;
23411 bugfix on 0.2.3.9-alpha. Found by "dcb".
23413 o Minor bugfixes (protocol correctness):
23414 - When receiving a VERSIONS cell with an odd number of bytes, close
23415 the connection immediately since the cell is malformed. Fixes bug
23416 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23419 o Minor bugfixes (build):
23420 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23421 turned off (that is, without support for v2 link handshakes). Fixes
23422 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23423 - Fix compilation warnings and startup issues when running with
23424 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23426 - Fix compilation on Solaris 9, which didn't like us having an
23427 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23429 o Minor bugfixes (testing):
23430 - Fix a segmentation fault in our benchmark code when running with
23431 Fedora's OpenSSL package, or any other OpenSSL that provides
23432 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
23434 o Minor bugfixes (log messages):
23435 - Fix a bug where clients using bridges would report themselves
23436 as 50% bootstrapped even without a live consensus document.
23437 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23438 - Suppress a warning where, if there's only one directory authority
23439 in the network, we would complain that votes and signatures cannot
23440 be uploaded to other directory authorities. Fixes bug 10842;
23441 bugfix on 0.2.2.26-beta.
23442 - Report bootstrapping progress correctly when we're downloading
23443 microdescriptors. We had updated our "do we have enough microdescs
23444 to begin building circuits?" logic most recently in 0.2.4.10-alpha
23445 (see bug 5956), but we left the bootstrap status event logic at
23446 "how far through getting 1/4 of them are we?" Fixes bug 9958;
23447 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
23449 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23450 - Avoid a crash bug when starting with a corrupted microdescriptor
23451 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23452 - If we fail to dump a previously cached microdescriptor to disk, avoid
23453 freeing duplicate data later on. Fixes bug 10423; bugfix on
23454 0.2.4.13-alpha. Spotted by "bobnomnom".
23456 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23457 - Correctly log long IPv6 exit policies, instead of truncating them
23458 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23459 - Our default TLS ecdhe groups were backwards: we meant to be using
23460 P224 for relays (for performance win) and P256 for bridges (since
23461 it is more common in the wild). Instead we had it backwards. After
23462 reconsideration, we decided that the default should be P256 on all
23463 hosts, since its security is probably better, and since P224 is
23464 reportedly used quite little in the wild. Found by "skruffy" on
23465 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23466 - Free directory authority certificate download statuses on exit
23467 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23469 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23470 - If the guard we choose first doesn't answer, we would try the
23471 second guard, but once we connected to the second guard we would
23472 abandon it and retry the first one, slowing down bootstrapping.
23473 The fix is to treat all our initially chosen guards as acceptable
23474 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23475 - Fix an assertion failure that would occur when disabling the
23476 ORPort setting on a running Tor process while accounting was
23477 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23478 - When examining the list of network interfaces to find our address,
23479 do not consider non-running or disabled network interfaces. Fixes
23480 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23481 - Avoid an off-by-one error when checking buffer boundaries when
23482 formatting the exit status of a pluggable transport helper.
23483 This is probably not an exploitable bug, but better safe than
23484 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23487 o Removed code and features:
23488 - Clients now reject any directory authority certificates lacking
23489 a dir-key-crosscert element. These have been included since
23490 0.2.1.9-alpha, so there's no real reason for them to be optional
23491 any longer. Completes proposal 157. Resolves ticket 10162.
23492 - Remove all code that existed to support the v2 directory system,
23493 since there are no longer any v2 directory authorities. Resolves
23495 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
23496 options, which were used for designating authorities as "Hidden
23497 service authorities". There has been no use of hidden service
23498 authorities since 0.2.2.1-alpha, when we stopped uploading or
23499 downloading v0 hidden service descriptors. Fixes bug 10881; also
23500 part of a fix for bug 10841.
23502 o Code simplification and refactoring:
23503 - Remove some old fallback code designed to keep Tor clients working
23504 in a network with only two working relays. Elsewhere in the code we
23505 have long since stopped supporting such networks, so there wasn't
23506 much point in keeping it around. Addresses ticket 9926.
23507 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
23508 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
23509 - Remove data structures which were introduced to implement the
23510 CellStatistics option: they are now redundant with the addition
23511 of a timestamp to the regular packed_cell_t data structure, which
23512 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
23515 o Documentation (man page) fixes:
23516 - Update manpage to describe some of the files you can expect to
23517 find in Tor's DataDirectory. Addresses ticket 9839.
23518 - Document that all but one DirPort entry must have the NoAdvertise
23519 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23521 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23522 - Clarify the usage and risks of setting the ContactInfo torrc line
23523 for your relay or bridge. Resolves ticket 9854.
23524 - Add anchors to the manpage so we can link to the html version of
23525 the documentation for specific options. Resolves ticket 9866.
23526 - Replace remaining references to DirServer in man page and
23527 log entries. Resolves ticket 10124.
23530 - Make the "tor-gencert" tool used by directory authority operators
23531 create 2048-bit signing keys by default (rather than 1024-bit, since
23532 1024-bit is uncomfortably small these days). Addresses ticket 10324.
23535 Changes in version 0.2.4.20 - 2013-12-22
23536 Tor 0.2.4.20 fixes potentially poor random number generation for users
23537 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
23538 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
23539 and 4) have no state file in their DataDirectory (as would happen on
23540 first start). Users who generated relay or hidden service identity
23541 keys in such a situation should discard them and generate new ones.
23543 This release also fixes a logic error that caused Tor clients to build
23544 many more preemptive circuits than they actually need.
23547 - Do not allow OpenSSL engines to replace the PRNG, even when
23548 HardwareAccel is set. The only default builtin PRNG engine uses
23549 the Intel RDRAND instruction to replace the entire PRNG, and
23550 ignores all attempts to seed it with more entropy. That's
23551 cryptographically stupid: the right response to a new alleged
23552 entropy source is never to discard all previously used entropy
23553 sources. Fixes bug 10402; works around behavior introduced in
23554 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23556 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23557 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23558 - Avoid launching spurious extra circuits when a stream is pending.
23559 This fixes a bug where any circuit that _wasn't_ unusable for new
23560 streams would be treated as if it were, causing extra circuits to
23561 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23564 - Avoid a crash bug when starting with a corrupted microdescriptor
23565 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23566 - If we fail to dump a previously cached microdescriptor to disk, avoid
23567 freeing duplicate data later on. Fixes bug 10423; bugfix on
23568 0.2.4.13-alpha. Spotted by "bobnomnom".
23571 Changes in version 0.2.4.19 - 2013-12-11
23572 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23573 (1986-2013). Aaron worked on diverse projects including helping to guide
23574 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23575 transparency to the U.S government's PACER documents, and contributing
23576 design and development for Tor and Tor2Web. Aaron was one of the latest
23577 martyrs in our collective fight for civil liberties and human rights,
23578 and his death is all the more painful because he was one of us.
23580 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
23581 a new circuit handshake and link encryption that use ECC to provide
23582 better security and efficiency; makes relays better manage circuit
23583 creation requests; uses "directory guards" to reduce client enumeration
23584 risks; makes bridges collect and report statistics about the pluggable
23585 transports they support; cleans up and improves our geoip database;
23586 gets much closer to IPv6 support for clients, bridges, and relays; makes
23587 directory authorities use measured bandwidths rather than advertised
23588 ones when computing flags and thresholds; disables client-side DNS
23589 caching to reduce tracking risks; and fixes a big bug in bridge
23590 reachability testing. This release introduces two new design
23591 abstractions in the code: a new "channel" abstraction between circuits
23592 and or_connections to allow for implementing alternate relay-to-relay
23593 transports, and a new "circuitmux" abstraction storing the queue of
23594 circuits for a channel. The release also includes many stability,
23595 security, and privacy fixes.
23598 Changes in version 0.2.4.18-rc - 2013-11-16
23599 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
23600 series. It takes a variety of fixes from the 0.2.5.x branch to improve
23601 stability, performance, and better handling of edge cases.
23604 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23605 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23606 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23607 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23608 them to solve bug 6033.)
23611 - No longer stop reading or writing on cpuworker connections when
23612 our rate limiting buckets go empty. Now we should handle circuit
23613 handshake requests more promptly. Resolves bug 9731.
23614 - If we are unable to save a microdescriptor to the journal, do not
23615 drop it from memory and then reattempt downloading it. Fixes bug
23616 9645; bugfix on 0.2.2.6-alpha.
23617 - Stop trying to bootstrap all our directory information from
23618 only our first guard. Discovered while fixing bug 9946; bugfix
23620 - The new channel code sometimes lost track of in-progress circuits,
23621 causing long-running clients to stop building new circuits. The
23622 fix is to always call circuit_n_chan_done(chan, 0) from
23623 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23625 o Minor bugfixes (on 0.2.4.x):
23626 - Correctly log long IPv6 exit policies, instead of truncating them
23627 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23628 - Our default TLS ecdhe groups were backwards: we meant to be using
23629 P224 for relays (for performance win) and P256 for bridges (since
23630 it is more common in the wild). Instead we had it backwards. After
23631 reconsideration, we decided that the default should be P256 on all
23632 hosts, since its security is probably better, and since P224 is
23633 reportedly used quite little in the wild. Found by "skruffy" on
23634 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23635 - Free directory authority certificate download statuses on exit
23636 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23638 o Minor bugfixes (on 0.2.3.x and earlier):
23639 - If the guard we choose first doesn't answer, we would try the
23640 second guard, but once we connected to the second guard we would
23641 abandon it and retry the first one, slowing down bootstrapping.
23642 The fix is to treat all our initially chosen guards as acceptable
23643 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23644 - Fix an assertion failure that would occur when disabling the
23645 ORPort setting on a running Tor process while accounting was
23646 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23647 - When examining the list of network interfaces to find our address,
23648 do not consider non-running or disabled network interfaces. Fixes
23649 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23650 - Avoid an off-by-one error when checking buffer boundaries when
23651 formatting the exit status of a pluggable transport helper.
23652 This is probably not an exploitable bug, but better safe than
23653 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23656 o Minor features (protecting client timestamps):
23657 - Clients no longer send timestamps in their NETINFO cells. These were
23658 not used for anything, and they provided one small way for clients
23659 to be distinguished from each other as they moved from network to
23660 network or behind NAT. Implements part of proposal 222.
23661 - Clients now round timestamps in INTRODUCE cells down to the nearest
23662 10 minutes. If a new Support022HiddenServices option is set to 0, or
23663 if it's set to "auto" and the feature is disabled in the consensus,
23664 the timestamp is sent as 0 instead. Implements part of proposal 222.
23665 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23666 a big deal from a security point of view, but it achieves no actual
23667 good purpose, and isn't needed. Implements part of proposal 222.
23668 - Reduce down accuracy of timestamps in hidden service descriptors.
23669 Implements part of proposal 222.
23671 o Minor features (other):
23672 - Improve the circuit queue out-of-memory handler. Previously, when
23673 we ran low on memory, we'd close whichever circuits had the most
23674 queued cells. Now, we close those that have the *oldest* queued
23675 cells, on the theory that those are most responsible for us
23676 running low on memory. Based on analysis from a forthcoming paper
23677 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23678 - Generate bootstrapping status update events correctly when fetching
23679 microdescriptors. Fixes bug 9927.
23680 - Update to the October 2 2013 Maxmind GeoLite Country database.
23682 o Documentation fixes:
23683 - Clarify the usage and risks of setting the ContactInfo torrc line
23684 for your relay or bridge. Resolves ticket 9854.
23685 - Add anchors to the manpage so we can link to the html version of
23686 the documentation for specific options. Resolves ticket 9866.
23687 - Replace remaining references to DirServer in man page and
23688 log entries. Resolves ticket 10124.
23691 Changes in version 0.2.5.1-alpha - 2013-10-02
23692 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
23693 on Linux, allows bridges that offer pluggable transports to report usage
23694 statistics, fixes many issues to make testing easier, and provides
23695 a pile of minor features and bugfixes that have been waiting for a
23696 release of the new branch.
23698 This is the first alpha release in a new series, so expect there to
23699 be bugs. Users who would rather test out a more stable branch should
23700 stay with 0.2.4.x for now.
23702 o Major features (security):
23703 - Use the seccomp2 syscall filtering facility on Linux to limit
23704 which system calls Tor can invoke. This is an experimental,
23705 Linux-only feature to provide defense-in-depth against unknown
23706 attacks. To try turning it on, set "Sandbox 1" in your torrc
23707 file. Please be ready to report bugs. We hope to add support
23708 for better sandboxing in the future, including more fine-grained
23709 filters, better division of responsibility, and support for more
23710 platforms. This work has been done by Cristian-Matei Toader for
23711 Google Summer of Code.
23712 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23713 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23714 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23715 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23716 them to solve bug 6033.)
23718 o Major features (other):
23719 - Add support for passing arguments to managed pluggable transport
23720 proxies. Implements ticket 3594.
23721 - Bridges now track GeoIP information and the number of their users
23722 even when pluggable transports are in use, and report usage
23723 statistics in their extra-info descriptors. Resolves tickets 4773
23725 - Make testing Tor networks bootstrap better: lower directory fetch
23726 retry schedules and maximum interval without directory requests,
23727 and raise maximum download tries. Implements ticket 6752.
23728 - Add make target 'test-network' to run tests on a Chutney network.
23729 Implements ticket 8530.
23730 - The ntor handshake is now on-by-default, no matter what the
23731 directory authorities recommend. Implements ticket 8561.
23734 - Instead of writing destroy cells directly to outgoing connection
23735 buffers, queue them and intersperse them with other outgoing cells.
23736 This can prevent a set of resource starvation conditions where too
23737 many pending destroy cells prevent data cells from actually getting
23738 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
23739 bugfix on 0.2.0.1-alpha.
23740 - If we are unable to save a microdescriptor to the journal, do not
23741 drop it from memory and then reattempt downloading it. Fixes bug
23742 9645; bugfix on 0.2.2.6-alpha.
23743 - The new channel code sometimes lost track of in-progress circuits,
23744 causing long-running clients to stop building new circuits. The
23745 fix is to always call circuit_n_chan_done(chan, 0) from
23746 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23749 - Tor now builds each source file in two modes: a mode that avoids
23750 exposing identifiers needlessly, and another mode that exposes
23751 more identifiers for testing. This lets the compiler do better at
23752 optimizing the production code, while enabling us to take more
23753 radical measures to let the unit tests test things.
23754 - The production builds no longer include functions used only in
23755 the unit tests; all functions exposed from a module only for
23756 unit-testing are now static in production builds.
23757 - Add an --enable-coverage configuration option to make the unit
23758 tests (and a new src/or/tor-cov target) to build with gcov test
23762 - We now have rudimentary function mocking support that our unit
23763 tests can use to test functions in isolation. Function mocking
23764 lets the tests temporarily replace a function's dependencies with
23765 stub functions, so that the tests can check the function without
23766 invoking the other functions it calls.
23767 - Add more unit tests for the <circid,channel>->circuit map, and
23768 the destroy-cell-tracking code to fix bug 7912.
23769 - Unit tests for failing cases of the TAP onion handshake.
23770 - More unit tests for address-manipulation functions.
23772 o Minor features (protecting client timestamps):
23773 - Clients no longer send timestamps in their NETINFO cells. These were
23774 not used for anything, and they provided one small way for clients
23775 to be distinguished from each other as they moved from network to
23776 network or behind NAT. Implements part of proposal 222.
23777 - Clients now round timestamps in INTRODUCE cells down to the nearest
23778 10 minutes. If a new Support022HiddenServices option is set to 0, or
23779 if it's set to "auto" and the feature is disabled in the consensus,
23780 the timestamp is sent as 0 instead. Implements part of proposal 222.
23781 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23782 a big deal from a security point of view, but it achieves no actual
23783 good purpose, and isn't needed. Implements part of proposal 222.
23784 - Reduce down accuracy of timestamps in hidden service descriptors.
23785 Implements part of proposal 222.
23787 o Minor features (config options):
23788 - Config (torrc) lines now handle fingerprints which are missing
23789 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
23790 - Support a --dump-config option to print some or all of the
23791 configured options. Mainly useful for debugging the command-line
23792 option parsing code. Helps resolve ticket 4647.
23793 - Raise awareness of safer logging: notify user of potentially
23794 unsafe config options, like logging more verbosely than severity
23795 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
23796 - Add a new configuration option TestingV3AuthVotingStartOffset
23797 that bootstraps a network faster by changing the timing for
23798 consensus votes. Addresses ticket 8532.
23799 - Add a new torrc option "ServerTransportOptions" that allows
23800 bridge operators to pass configuration parameters to their
23801 pluggable transports. Resolves ticket 8929.
23802 - The config (torrc) file now accepts bandwidth and space limits in
23803 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
23804 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
23807 o Minor features (build):
23808 - Add support for `--library-versions` flag. Implements ticket 6384.
23809 - Return the "unexpected sendme" warnings to a warn severity, but make
23810 them rate limited, to help diagnose ticket 8093.
23811 - Detect a missing asciidoc, and warn the user about it, during
23812 configure rather than at build time. Fixes issue 6506. Patch from
23815 o Minor features (other):
23816 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
23817 sockets in a single system call. Implements ticket 5129.
23818 - Log current accounting state (bytes sent and received + remaining
23819 time for the current accounting period) in the relay's heartbeat
23820 message. Implements ticket 5526; patch from Peter Retzlaff.
23821 - Implement the TRANSPORT_LAUNCHED control port event that
23822 notifies controllers about new launched pluggable
23823 transports. Resolves ticket 5609.
23824 - If we're using the pure-C 32-bit curve25519_donna implementation
23825 of curve25519, build it with the -fomit-frame-pointer option to
23826 make it go faster on register-starved hosts. This improves our
23827 handshake performance by about 6% on i386 hosts without nacl.
23828 Closes ticket 8109.
23829 - Update to the September 4 2013 Maxmind GeoLite Country database.
23832 - Set the listen() backlog limit to the largest actually supported
23833 on the system, not to the value in a header file. Fixes bug 9716;
23834 bugfix on every released Tor.
23835 - No longer accept malformed http headers when parsing urls from
23836 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
23837 bugfix on 0.0.6pre1.
23838 - In munge_extrainfo_into_routerinfo(), check the return value of
23839 memchr(). This would have been a serious issue if we ever passed
23840 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
23842 - On the chance that somebody manages to build Tor on a
23843 platform where time_t is unsigned, correct the way that
23844 microdesc_add_to_cache() handles negative time arguments.
23845 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
23846 - Reject relative control socket paths and emit a warning. Previously,
23847 single-component control socket paths would be rejected, but Tor
23848 would not log why it could not validate the config. Fixes bug 9258;
23849 bugfix on 0.2.3.16-alpha.
23851 o Minor bugfixes (command line):
23852 - Use a single command-line parser for parsing torrc options on the
23853 command line and for finding special command-line options to avoid
23854 inconsistent behavior for torrc option arguments that have the same
23855 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
23857 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
23858 9573; bugfix on 0.0.9pre5.
23860 o Minor fixes (build, auxiliary programs):
23861 - Stop preprocessing the "torify" script with autoconf, since
23862 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
23864 - The tor-fw-helper program now follows the standard convention and
23865 exits with status code "0" on success. Fixes bug 9030; bugfix on
23866 0.2.3.1-alpha. Patch by Arlo Breault.
23867 - Corrected ./configure advice for what openssl dev package you should
23868 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
23870 o Minor code improvements:
23871 - Remove constants and tests for PKCS1 padding; it's insecure and
23872 shouldn't be used for anything new. Fixes bug 8792; patch
23874 - Remove instances of strcpy() from the unit tests. They weren't
23875 hurting anything, since they were only in the unit tests, but it's
23876 embarrassing to have strcpy() in the code at all, and some analysis
23877 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
23878 0.2.3.8-alpha. Patch from Arlo Breault.
23880 o Removed features:
23881 - Remove migration code from when we renamed the "cached-routers"
23882 file to "cached-descriptors" back in 0.2.0.8-alpha. This
23883 incidentally resolves ticket 6502 by cleaning up the related code
23884 a bit. Patch from Akshay Hebbar.
23886 o Code simplification and refactoring:
23887 - Extract the common duplicated code for creating a subdirectory
23888 of the data directory and writing to a file in it. Fixes ticket
23889 4282; patch from Peter Retzlaff.
23890 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
23891 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
23892 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
23893 - Add a set of accessor functions for the circuit timeout data
23894 structure. Fixes ticket 6153; patch from "piet".
23895 - Clean up exit paths from connection_listener_new(). Closes ticket
23896 8789. Patch from Arlo Breault.
23897 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
23898 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
23899 - Use a doubly-linked list to implement the global circuit list.
23900 Resolves ticket 9108. Patch from Marek Majkowski.
23901 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
23904 Changes in version 0.2.4.17-rc - 2013-09-05
23905 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
23906 series. It adds an emergency step to help us tolerate the massive
23907 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
23908 circuit-level handshakes now effectively jump the queue compared to
23909 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
23910 big bug hindering bridge reachability tests.
23913 - Relays now process the new "NTor" circuit-level handshake requests
23914 with higher priority than the old "TAP" circuit-level handshake
23915 requests. We still process some TAP requests to not totally starve
23916 0.2.3 clients when NTor becomes popular. A new consensus parameter
23917 "NumNTorsPerTAP" lets us tune the balance later if we need to.
23918 Implements ticket 9574.
23921 - If the circuit build timeout logic is disabled (via the consensus,
23922 or because we are an authority), then don't build testing circuits.
23923 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
23924 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
23925 previously they did not, which prevented them from receiving
23926 successful connections from relays for self-test or bandwidth
23927 testing. Also, when a relay is extending a circuit to a bridge,
23928 it needs to send a NETINFO cell, even when the bridge hasn't sent
23929 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
23930 - If the time to download the next old-style networkstatus is in
23931 the future, do not decline to consider whether to download the
23932 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
23936 - Avoid double-closing the listener socket in our socketpair()
23937 replacement (used on Windows) in the case where the addresses on
23938 our opened sockets don't match what we expected. Fixes bug 9400;
23939 bugfix on 0.0.2pre7. Found by Coverity.
23941 o Minor fixes (config options):
23942 - Avoid overflows when the user sets MaxCircuitDirtiness to a
23943 ridiculously high value, by imposing a (ridiculously high) 30-day
23944 maximum on MaxCircuitDirtiness.
23945 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
23946 message is logged at notice, not at info.
23947 - Warn and fail if a server is configured not to advertise any
23948 ORPorts at all. (We need *something* to put in our descriptor,
23949 or we just won't work.)
23952 - Track how many "TAP" and "NTor" circuit handshake requests we get,
23953 and how many we complete, and log it every hour to help relay
23954 operators follow trends in network load. Addresses ticket 9658.
23955 - Update to the August 7 2013 Maxmind GeoLite Country database.
23958 Changes in version 0.2.4.16-rc - 2013-08-10
23959 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
23960 series. It fixes several crash bugs in the 0.2.4 branch.
23963 - Fix a bug in the voting algorithm that could yield incorrect results
23964 when a non-naming authority declared too many flags. Fixes bug 9200;
23965 bugfix on 0.2.0.3-alpha.
23966 - Fix an uninitialized read that could in some cases lead to a remote
23967 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
23968 Anybody running a hidden service on the experimental 0.2.4.x
23969 branch should upgrade. (This is, so far as we know, unrelated to
23971 - Avoid an assertion failure when processing DNS replies without the
23972 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
23973 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
23974 0.2.4.15-rc. Found by stem integration tests.
23977 - Fix an invalid memory read that occurred when a pluggable
23978 transport proxy failed its configuration protocol.
23979 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
23980 - When evaluating whether to use a connection that we haven't
23981 decided is canonical using a recent link protocol version,
23982 decide that it's canonical only if it used address _does_
23983 match the desired address. Fixes bug 9309; bugfix on
23984 0.2.4.4-alpha. Reported by skruffy.
23985 - Make the default behavior of NumDirectoryGuards be to track
23986 NumEntryGuards. Now a user who changes only NumEntryGuards will get
23987 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
23988 - Fix a spurious compilation warning with some older versions of
23989 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
23992 - Update to the July 3 2013 Maxmind GeoLite Country database.
23995 Changes in version 0.2.4.15-rc - 2013-07-01
23996 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
23997 series. It fixes a few smaller bugs, but generally appears stable.
23998 Please test it and let us know whether it is!
24001 - When receiving a new configuration file via the control port's
24002 LOADCONF command, do not treat the defaults file as absent.
24003 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
24006 - Issue a warning when running with the bufferevents backend enabled.
24007 It's still not stable, and people should know that they're likely
24008 to hit unexpected problems. Closes ticket 9147.
24011 Changes in version 0.2.4.14-alpha - 2013-06-18
24012 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
24013 present in 0.2.4.13-alpha.
24016 - When we have too much memory queued in circuits (according to a new
24017 MaxMemInCellQueues option), close the circuits consuming the most
24018 memory. This prevents us from running out of memory as a relay if
24019 circuits fill up faster than they can be drained. Fixes bug 9063;
24020 bugfix on the 54th commit of Tor. This bug is a further fix beyond
24021 bug 6252, whose fix was merged into 0.2.3.21-rc.
24023 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
24024 where we tried to solve this issue simply by imposing an upper limit
24025 on the number of queued cells for a single circuit. That approach
24026 proved to be problematic, since there are ways to provoke clients to
24027 send a number of cells in excess of any such reasonable limit. Fixes
24028 bug 9072; bugfix on 0.2.4.13-alpha.
24030 - Limit hidden service descriptors to at most ten introduction
24031 points, to slow one kind of guard enumeration. Fixes bug 9002;
24032 bugfix on 0.1.1.11-alpha.
24035 Changes in version 0.2.4.13-alpha - 2013-06-14
24036 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
24037 vulnerabilities, makes socks5 username/password circuit isolation
24038 actually actually work (this time for sure!), and cleans up a bunch
24039 of other issues in preparation for a release candidate.
24041 o Major bugfixes (robustness):
24042 - Close any circuit that has too many cells queued on it. Fixes
24043 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
24044 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
24045 - Prevent the get_freelists() function from running off the end of
24046 the list of freelists if it somehow gets an unrecognized
24047 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
24049 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
24050 when an exit connection with optimistic data succeeds immediately
24051 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
24053 - Fix a directory authority crash bug when building a consensus
24054 using an older consensus as its basis. Fixes bug 8833. Bugfix
24058 - Avoid a memory leak where we would leak a consensus body when we
24059 find that a consensus which we couldn't previously verify due to
24060 missing certificates is now verifiable. Fixes bug 8719; bugfix
24062 - We used to always request authority certificates by identity digest,
24063 meaning we'd get the newest one even when we wanted one with a
24064 different signing key. Then we would complain about being given
24065 a certificate we already had, and never get the one we really
24066 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
24067 resource to request the one we want. Fixes bug 5595; bugfix on
24069 - Follow the socks5 protocol when offering username/password
24070 authentication. The fix for bug 8117 exposed this bug, and it
24071 turns out real-world applications like Pidgin do care. Bugfix on
24072 0.2.3.2-alpha; fixes bug 8879.
24073 - Prevent failures on Windows Vista and later when rebuilding the
24074 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
24075 bugfix on 0.2.4.12-alpha.
24078 - Fix an impossible buffer overrun in the AES unit tests. Fixes
24079 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
24080 - If for some reason we fail to write a microdescriptor while
24081 rebuilding the cache, do not let the annotations from that
24082 microdescriptor linger in the cache file, and do not let the
24083 microdescriptor stay recorded as present in its old location.
24084 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
24085 - Fix a memory leak that would occur whenever a configuration
24086 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
24087 - Paste the description for PathBias parameters from the man
24088 page into or.h, so the code documents them too. Fixes bug 7982;
24089 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
24090 - Relays now treat a changed IPv6 ORPort as sufficient reason to
24091 publish an updated descriptor. Fixes bug 6026; bugfix on
24093 - When launching a resolve request on behalf of an AF_UNIX control
24094 socket, omit the address field of the new entry connection, used in
24095 subsequent controller events, rather than letting tor_dup_addr()
24096 set it to "<unknown address type>". Fixes bug 8639; bugfix on
24099 o Minor bugfixes (log messages):
24100 - Fix a scaling issue in the path bias accounting code that
24101 resulted in "Bug:" log messages from either
24102 pathbias_scale_close_rates() or pathbias_count_build_success().
24103 This represents a bugfix on a previous bugfix: the original fix
24104 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
24106 - Give a less useless error message when the user asks for an IPv4
24107 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
24111 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
24112 to tolerate bug 8093 for now.
24113 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
24114 in directory authority votes to describe whether they have enough
24115 measured bandwidths to ignore advertised (relay descriptor)
24116 bandwidth claims. Resolves ticket 8711.
24117 - Update to the June 5 2013 Maxmind GeoLite Country database.
24119 o Removed documentation:
24120 - Remove some of the older contents of doc/ as obsolete; move others
24121 to torspec.git. Fixes bug 8965.
24123 o Code simplification and refactoring:
24124 - Avoid using character buffers when constructing most directory
24125 objects: this approach was unwieldy and error-prone. Instead,
24126 build smartlists of strings, and concatenate them when done.
24129 Changes in version 0.2.4.12-alpha - 2013-04-18
24130 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
24131 process for lengthening the guard rotation period, makes directory
24132 authority opinions in the consensus a bit less gameable, makes socks5
24133 username/password circuit isolation actually work, and fixes a wide
24134 variety of other issues.
24137 - Raise the default time that a client keeps an entry guard from
24138 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
24139 2012 paper. (We would make it even longer, but we need better client
24140 load balancing first.) Also, make the guard lifetime controllable
24141 via a new GuardLifetime torrc option and a GuardLifetime consensus
24142 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
24143 - Directory authorities now prefer using measured bandwidths to
24144 advertised ones when computing flags and thresholds. Resolves
24146 - Directory authorities that have more than a threshold number
24147 of relays with measured bandwidths now treat relays with unmeasured
24148 bandwidths as having bandwidth 0. Resolves ticket 8435.
24150 o Major bugfixes (assert / resource use):
24151 - Avoid a bug where our response to TLS renegotiation under certain
24152 network conditions could lead to a busy-loop, with 100% CPU
24153 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
24154 - Avoid an assertion when we discover that we'd like to write a cell
24155 onto a closing connection: just discard the cell. Fixes another
24156 case of bug 7350; bugfix on 0.2.4.4-alpha.
24158 o Major bugfixes (client-side privacy):
24159 - When we mark a circuit as unusable for new circuits, have it
24160 continue to be unusable for new circuits even if MaxCircuitDirtiness
24161 is increased too much at the wrong time, or the system clock jumps
24162 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
24163 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
24164 which have resolved to internal addresses") is set, apply that
24165 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
24166 - When an exit relay rejects a stream with reason "exit policy", but
24167 we only know an exit policy summary (e.g. from the microdesc
24168 consensus) for it, do not mark the relay as useless for all exiting.
24169 Instead, mark just the circuit as unsuitable for that particular
24170 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
24171 - Allow applications to get proper stream isolation with
24172 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
24173 username/password authentication also offer "no authentication". Tor
24174 had previously preferred "no authentication", so the applications
24175 never actually sent Tor their auth details. Now Tor selects
24176 username/password authentication if it's offered. You can disable
24177 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
24178 bug 8117; bugfix on 0.2.3.3-alpha.
24180 o Major bugfixes (other):
24181 - When unable to find any working directory nodes to use as a
24182 directory guard, give up rather than adding the same non-working
24183 nodes to the directory guard list over and over. Fixes bug 8231;
24184 bugfix on 0.2.4.8-alpha.
24187 - Reject as invalid most directory objects containing a NUL.
24188 Belt-and-suspender fix for bug 8037.
24189 - In our testsuite, create temporary directories with a bit more
24190 entropy in their name to make name collisions less likely. Fixes
24192 - Add CACHED keyword to ADDRMAP events in the control protocol
24193 to indicate whether a DNS result will be cached or not. Resolves
24195 - Update to the April 3 2013 Maxmind GeoLite Country database.
24197 o Minor features (build):
24198 - Detect and reject attempts to build Tor with threading support
24199 when OpenSSL has been compiled without threading support.
24201 - Clarify that when autoconf is checking for nacl, it is checking
24202 specifically for nacl with a fast curve25519 implementation.
24204 - Warn if building on a platform with an unsigned time_t: there
24205 are too many places where Tor currently assumes that time_t can
24206 hold negative values. We'd like to fix them all, but probably
24209 o Minor bugfixes (build):
24210 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
24211 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
24212 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
24213 - Add the old src/or/micro-revision.i filename to CLEANFILES.
24214 On the off chance that somebody has one, it will go away as soon
24215 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
24216 - Build Tor correctly on 32-bit platforms where the compiler can build
24217 but not run code using the "uint128_t" construction. Fixes bug 8587;
24218 bugfix on 0.2.4.8-alpha.
24219 - Fix compilation warning with some versions of clang that would
24220 prefer the -Wswitch-enum compiler flag to warn about switch
24221 statements with missing enum values, even if those switch
24222 statements have a "default:" statement. Fixes bug 8598; bugfix
24225 o Minor bugfixes (protocol):
24226 - Fix the handling of a TRUNCATE cell when it arrives while the
24227 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
24228 - Fix a misframing issue when reading the version numbers in a
24229 VERSIONS cell. Previously we would recognize [00 01 00 02] as
24230 'version 1, version 2, and version 0x100', when it should have
24231 only included versions 1 and 2. Fixes bug 8059; bugfix on
24232 0.2.0.10-alpha. Reported pseudonymously.
24233 - Make the format and order of STREAM events for DNS lookups
24234 consistent among the various ways to launch DNS lookups. Fixes
24235 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24236 - Correct our check for which versions of Tor support the EXTEND2
24237 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24238 later, when support was really added in version 0.2.4.8-alpha.
24239 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24241 o Minor bugfixes (other):
24242 - Correctly store microdescriptors and extrainfo descriptors with
24243 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24244 Bug reported by "cypherpunks".
24245 - Increase the width of the field used to remember a connection's
24246 link protocol version to two bytes. Harmless for now, since the
24247 only currently recognized versions are one byte long. Reported
24248 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24249 - If the state file's path bias counts are invalid (presumably from a
24250 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24251 additional checks and log messages to the scaling of Path Bias
24252 counts, in case there still are remaining issues with scaling.
24253 Should help resolve bug 8235.
24254 - Eliminate several instances where we use "Nickname=ID" to refer to
24255 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24256 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24257 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24259 o Minor bugfixes (syscalls):
24260 - Always check the return values of functions fcntl() and
24261 setsockopt(). We don't believe these are ever actually failing in
24262 practice, but better safe than sorry. Also, checking these return
24263 values should please analysis tools like Coverity. Patch from
24264 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24265 - Use direct writes rather than stdio when building microdescriptor
24266 caches, in an attempt to mitigate bug 8031, or at least make it
24269 o Minor bugfixes (config):
24270 - When rejecting a configuration because we were unable to parse a
24271 quoted string, log an actual error message. Fixes bug 7950; bugfix
24273 - Behave correctly when the user disables LearnCircuitBuildTimeout
24274 but doesn't tell us what they would like the timeout to be. Fixes
24275 bug 6304; bugfix on 0.2.2.14-alpha.
24276 - When autodetecting the number of CPUs, use the number of available
24277 CPUs in preference to the number of configured CPUs. Inform the
24278 user if this reduces the number of available CPUs. Fixes bug 8002;
24279 bugfix on 0.2.3.1-alpha.
24280 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24281 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24282 bug 8180; bugfix on 0.2.3.11-alpha.
24283 - Allow TestingTorNetworks to override the 4096-byte minimum for
24284 the Fast threshold. Otherwise they can't bootstrap until they've
24285 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24286 - Fix some logic errors when the user manually overrides the
24287 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24290 o Minor bugfixes (log messages to help diagnose bugs):
24291 - If we fail to free a microdescriptor because of bug 7164, log
24292 the filename and line number from which we tried to free it.
24293 - Add another diagnostic to the heartbeat message: track and log
24294 overhead that TLS is adding to the data we write. If this is
24295 high, we are sending too little data to SSL_write at a time.
24296 Diagnostic for bug 7707.
24297 - Add more detail to a log message about relaxed timeouts, to help
24299 - Warn more aggressively when flushing microdescriptors to a
24300 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24301 or at least make it more diagnosable.
24302 - Improve debugging output to help track down bug 8185 ("Bug:
24303 outgoing relay cell has n_chan==NULL. Dropping.")
24304 - Log the purpose of a path-bias testing circuit correctly.
24305 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24307 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24308 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24309 They might never timeout. This should eliminate some/all cases of
24310 the relaxed timeout log message.
24311 - Use circuit creation time for network liveness evaluation. This
24312 should eliminate warning log messages about liveness caused
24313 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24315 - Reduce a path bias length check from notice to info. The message
24316 is triggered when creating controller circuits. Fixes bug 8196;
24317 bugfix on 0.2.4.8-alpha.
24318 - Fix a path state issue that triggered a notice during relay startup.
24319 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24320 - Reduce occurrences of warns about circuit purpose in
24321 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24324 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24325 - If we encounter a write failure on a SOCKS connection before we
24326 finish our SOCKS handshake, don't warn that we closed the
24327 connection before we could send a SOCKS reply. Fixes bug 8427;
24328 bugfix on 0.1.0.1-rc.
24329 - Correctly recognize that [::1] is a loopback address. Fixes
24330 bug 8377; bugfix on 0.2.1.3-alpha.
24331 - Fix a directory authority warn caused when we have a large amount
24332 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24333 - Don't log inappropriate heartbeat messages when hibernating: a
24334 hibernating node is _expected_ to drop out of the consensus,
24335 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24336 bugfix on 0.2.3.1-alpha.
24337 - Don't complain about bootstrapping problems while hibernating.
24338 These complaints reflect a general code problem, but not one
24339 with any problematic effects (no connections are actually
24340 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24342 o Documentation fixes:
24343 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24344 names match. Fixes bug 7768.
24345 - Make the torify manpage no longer refer to tsocks; torify hasn't
24346 supported tsocks since 0.2.3.14-alpha.
24347 - Make the tor manpage no longer reference tsocks.
24348 - Fix the GeoIPExcludeUnknown documentation to refer to
24349 ExcludeExitNodes rather than the currently nonexistent
24350 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24353 - The tor-tsocks.conf is no longer distributed or installed. We
24354 recommend that tsocks users use torsocks instead. Resolves
24358 Changes in version 0.2.4.11-alpha - 2013-03-11
24359 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24360 more robust, makes hidden service authentication work again, and
24361 resolves a DPI fingerprint for Tor's SSL transport.
24363 o Major features (directory authorities):
24364 - Directory authorities now support a new consensus method (17)
24365 where they cap the published bandwidth of servers for which
24366 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24367 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24368 serve any v2 directory information. Now we can test disabling the
24369 old deprecated v2 directory format, and see whether doing so has
24370 any effect on network load. Begins to fix bug 6783.
24371 - Directory authorities now include inside each vote a statement of
24372 the performance thresholds they used when assigning flags.
24373 Implements ticket 8151.
24375 o Major bugfixes (directory authorities):
24376 - Stop marking every relay as having been down for one hour every
24377 time we restart a directory authority. These artificial downtimes
24378 were messing with our Stable and Guard flag calculations. Fixes
24379 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24381 o Major bugfixes (hidden services):
24382 - Allow hidden service authentication to succeed again. When we
24383 refactored the hidden service introduction code back
24384 in 0.2.4.1-alpha, we didn't update the code that checks
24385 whether authentication information is present, causing all
24386 authentication checks to return "false". Fix for bug 8207; bugfix
24387 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24389 o Minor features (relays, bridges):
24390 - Make bridge relays check once a minute for whether their IP
24391 address has changed, rather than only every 15 minutes. Resolves
24392 bugs 1913 and 1992.
24393 - Refactor resolve_my_address() so it returns the method by which we
24394 decided our public IP address (explicitly configured, resolved from
24395 explicit hostname, guessed from interfaces, learned by gethostname).
24396 Now we can provide more helpful log messages when a relay guesses
24397 its IP address incorrectly (e.g. due to unexpected lines in
24398 /etc/hosts). Resolves ticket 2267.
24399 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24400 microdescriptor-related dir requests, and only fall back to normal
24401 descriptors if none of their bridges can handle microdescriptors
24402 (as opposed to the fix in ticket 4013, which caused them to fall
24403 back to normal descriptors if *any* of their bridges preferred
24404 them). Resolves ticket 4994.
24405 - Randomize the lifetime of our SSL link certificate, so censors can't
24406 use the static value for filtering Tor flows. Resolves ticket 8443;
24407 related to ticket 4014 which was included in 0.2.2.33.
24408 - Support a new version of the link protocol that allows 4-byte circuit
24409 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24410 a possible resource exhaustion issue. Closes ticket 7351; implements
24413 o Minor features (portability):
24414 - Tweak the curve25519-donna*.c implementations to tolerate systems
24415 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24416 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24417 the signs of types during autoconf. This is better than our old
24418 approach, which didn't work when cross-compiling.
24419 - Detect the sign of enum values, rather than assuming that MSC is the
24420 only compiler where enum types are all signed. Fixes bug 7727;
24421 bugfix on 0.2.4.10-alpha.
24423 o Minor features (other):
24424 - Say "KBytes" rather than "KB" in the man page (for various values
24425 of K), to further reduce confusion about whether Tor counts in
24426 units of memory or fractions of units of memory. Resolves ticket 7054.
24427 - Clear the high bit on curve25519 public keys before passing them to
24428 our backend, in case we ever wind up using a backend that doesn't do
24429 so itself. If we used such a backend, and *didn't* clear the high bit,
24430 we could wind up in a situation where users with such backends would
24431 be distinguishable from users without. Fixes bug 8121; bugfix on
24433 - Update to the March 6 2013 Maxmind GeoLite Country database.
24435 o Minor bugfixes (clients):
24436 - When we receive a RELAY_END cell with the reason DONE, or with no
24437 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24438 status as "connection refused". Previously we reported these cases
24439 as success but then immediately closed the connection. Fixes bug
24440 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24441 - Downgrade an assertion in connection_ap_expire_beginning to an
24442 LD_BUG message. The fix for bug 8024 should prevent this message
24443 from displaying, but just in case, a warn that we can diagnose
24444 is better than more assert crashes. Fixes bug 8065; bugfix on
24446 - Lower path use bias thresholds to .80 for notice and .60 for warn.
24447 Also make the rate limiting flags for the path use bias log messages
24448 independent from the original path bias flags. Fixes bug 8161;
24449 bugfix on 0.2.4.10-alpha.
24451 o Minor bugfixes (relays):
24452 - Stop trying to resolve our hostname so often (e.g. every time we
24453 think about doing a directory fetch). Now we reuse the cached
24454 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
24455 and 2410 (bugfix on 0.1.2.2-alpha).
24456 - Stop sending a stray "(null)" in some cases for the server status
24457 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
24459 - When choosing which stream on a formerly stalled circuit to wake
24460 first, make better use of the platform's weak RNG. Previously,
24461 we had been using the % ("modulo") operator to try to generate a
24462 1/N chance of picking each stream, but this behaves badly with
24463 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
24465 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
24466 Irix's random() only return 15 bits; Solaris's random() returns more
24467 bits but its RAND_MAX says it only returns 15, and so on. Motivated
24468 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
24470 o Minor bugfixes (directory authorities):
24471 - Directory authorities now use less space when formatting identical
24472 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
24475 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
24476 - Avoid leaking memory if we fail to compute a consensus signature
24477 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
24478 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
24480 - Fix a memory leak during safe-cookie controller authentication.
24481 Bugfix on 0.2.3.13-alpha.
24482 - Avoid memory leak of IPv6 policy content if we fail to format it into
24483 a router descriptor. Bugfix on 0.2.4.7-alpha.
24485 o Minor bugfixes (other code correctness issues):
24486 - Avoid a crash if we fail to generate an extrainfo descriptor.
24487 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
24488 this is CID 718634.
24489 - When detecting the largest possible file descriptor (in order to
24490 close all file descriptors when launching a new program), actually
24491 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
24492 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
24494 - Fix a copy-and-paste error when adding a missing A1 to a routerset
24495 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
24496 Bugfix on 0.2.4.10-alpha.
24497 - Fix an impossible-to-trigger integer overflow when estimating how
24498 long our onionskin queue would take. (This overflow would require us
24499 to accept 4 million onionskins before processing 100 of them.) Fixes
24500 bug 8210; bugfix on 0.2.4.10-alpha.
24502 o Code simplification and refactoring:
24503 - Add a wrapper function for the common "log a message with a
24507 Changes in version 0.2.4.10-alpha - 2013-02-04
24508 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
24509 certain attacks that flood the network with relays; changes the queue
24510 for circuit create requests from a sized-based limit to a time-based
24511 limit; resumes building with MSVC on Windows; and fixes a wide variety
24514 o Major bugfixes (directory authority):
24515 - When computing directory thresholds, ignore any rejected-as-sybil
24516 nodes during the computation so that they can't influence Fast,
24517 Guard, etc. (We should have done this for proposal 109.) Fixes
24519 - When marking a node as a likely sybil, reset its uptime metrics
24520 to zero, so that it cannot time towards getting marked as Guard,
24521 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
24525 - When a TLS write is partially successful but incomplete, remember
24526 that the flushed part has been flushed, and notice that bytes were
24527 actually written. Reported and fixed pseudonymously. Fixes bug
24528 7708; bugfix on Tor 0.1.0.5-rc.
24529 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
24530 ID: these could be used to create unexpected streams and circuits
24531 which would count as "present" to some parts of Tor but "absent"
24532 to others, leading to zombie circuits and streams or to a bandwidth
24533 denial-of-service. Fixes bug 7889; bugfix on every released version
24534 of Tor. Reported by "oftc_must_be_destroyed".
24535 - Rename all macros in our local copy of queue.h to begin with "TOR_".
24536 This change seems the only good way to permanently prevent conflicts
24537 with queue.h on various operating systems. Fixes bug 8107; bugfix
24540 o Major features (relay):
24541 - Instead of limiting the number of queued onionskins (aka circuit
24542 create requests) to a fixed, hard-to-configure number, we limit
24543 the size of the queue based on how many we expect to be able to
24544 process in a given amount of time. We estimate the time it will
24545 take to process an onionskin based on average processing time
24546 of previous onionskins. Closes ticket 7291. You'll never have to
24547 configure MaxOnionsPending again.
24549 o Major features (portability):
24550 - Resume building correctly with MSVC and Makefile.nmake. This patch
24551 resolves numerous bugs and fixes reported by ultramage, including
24552 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
24553 - Make the ntor and curve25519 code build correctly with MSVC.
24554 Fix on 0.2.4.8-alpha.
24557 - When directory authorities are computing thresholds for flags,
24558 never let the threshold for the Fast flag fall below 4096
24559 bytes. Also, do not consider nodes with extremely low bandwidths
24560 when deciding thresholds for various directory flags. This change
24561 should raise our threshold for Fast relays, possibly in turn
24562 improving overall network performance; see ticket 1854. Resolves
24564 - The Tor client now ignores sub-domain components of a .onion
24565 address. This change makes HTTP "virtual" hosting
24566 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24567 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24568 hosted on the same hidden service. Implements proposal 204.
24569 - We compute the overhead from passing onionskins back and forth to
24570 cpuworkers, and report it when dumping statistics in response to
24571 SIGUSR1. Supports ticket 7291.
24573 o Minor features (path selection):
24574 - When deciding whether we have enough descriptors to build circuits,
24575 instead of looking at raw relay counts, look at which fraction
24576 of (bandwidth-weighted) paths we're able to build. This approach
24577 keeps clients from building circuits if their paths are likely to
24578 stand out statistically. The default fraction of paths needed is
24579 taken from the consensus directory; you can override it with the
24580 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
24581 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
24582 and we have GeoIP information, also exclude all nodes with unknown
24583 countries "??" and "A1". This behavior is controlled by the
24584 new GeoIPExcludeUnknown option: you can make such nodes always
24585 excluded with "GeoIPExcludeUnknown 1", and disable the feature
24586 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
24587 gets you the default behavior. Implements feature 7706.
24588 - Path Use Bias: Perform separate accounting for successful circuit
24589 use. Keep separate statistics on stream attempt rates versus stream
24590 success rates for each guard. Provide configurable thresholds to
24591 determine when to emit log messages or disable use of guards that
24592 fail too many stream attempts. Resolves ticket 7802.
24594 o Minor features (log messages):
24595 - When learning a fingerprint for a bridge, log its corresponding
24596 transport type. Implements ticket 7896.
24597 - Improve the log message when "Bug/attack: unexpected sendme cell
24598 from client" occurs, to help us track bug 8093.
24601 - Remove a couple of extraneous semicolons that were upsetting the
24602 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
24603 bugfix on 0.2.2.1-alpha.
24604 - Remove a source of rounding error during path bias count scaling;
24605 don't count cannibalized circuits as used for path bias until we
24606 actually try to use them; and fix a circuit_package_relay_cell()
24607 warning message about n_chan==NULL. Fixes bug 7802.
24608 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
24609 actually link against nacl when we're configured to use it. Fixes
24610 bug 7972; bugfix on 0.2.4.8-alpha.
24611 - Compile correctly with the --disable-curve25519 option. Fixes
24612 bug 8153; bugfix on 0.2.4.8-alpha.
24614 o Build improvements:
24615 - Do not report status verbosely from autogen.sh unless the -v flag
24616 is specified. Fixes issue 4664. Patch from Onizuka.
24617 - Replace all calls to snprintf() outside of src/ext with
24618 tor_snprintf(). Also remove the #define to replace snprintf with
24619 _snprintf on Windows; they have different semantics, and all of
24620 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
24621 - Try to detect if we are ever building on a platform where
24622 memset(...,0,...) does not set the value of a double to 0.0. Such
24623 platforms are permitted by the C standard, though in practice
24624 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
24625 currently support them, but it's better to detect them and fail
24626 than to perform erroneously.
24628 o Removed features:
24629 - Stop exporting estimates of v2 and v3 directory traffic shares
24630 in extrainfo documents. They were unneeded and sometimes inaccurate.
24631 Also stop exporting any v2 directory request statistics. Resolves
24633 - Drop support for detecting and warning about versions of Libevent
24634 before 1.3e. Nothing reasonable ships with them any longer;
24635 warning the user about them shouldn't be needed. Resolves ticket
24638 o Code simplifications and refactoring:
24639 - Rename "isin" functions to "contains", for grammar. Resolves
24641 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
24642 with the natural logarithm function from the system libm. Resolves
24646 Changes in version 0.2.4.9-alpha - 2013-01-15
24647 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
24648 work more robustly.
24651 - Fix backward compatibility logic when receiving an embedded ntor
24652 handshake tunneled in a CREATE cell. This clears up the "Bug:
24653 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
24657 Changes in version 0.2.4.8-alpha - 2013-01-14
24658 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
24659 risks, adds a new stronger and faster circuit handshake, and offers
24660 stronger and faster link encryption when both sides support it.
24663 - Preliminary support for directory guards (proposal 207): when
24664 possible, clients now use their entry guards for non-anonymous
24665 directory requests. This can help prevent client enumeration. Note
24666 that this behavior only works when we have a usable consensus
24667 directory, and when options about what to download are more or less
24668 standard. In the future we should re-bootstrap from our guards,
24669 rather than re-bootstrapping from the preconfigured list of
24670 directory sources that ships with Tor. Resolves ticket 6526.
24671 - Tor relays and clients now support a better CREATE/EXTEND cell
24672 format, allowing the sender to specify multiple address, identity,
24673 and handshake types. Implements Robert Ransom's proposal 200;
24674 closes ticket 7199.
24676 o Major features (new circuit handshake):
24677 - Tor now supports a new circuit extension handshake designed by Ian
24678 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
24679 circuit extension handshake, later called "TAP", was a bit slow
24680 (especially on the relay side), had a fragile security proof, and
24681 used weaker keys than we'd now prefer. The new circuit handshake
24682 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
24683 function, making it significantly more secure than the older
24684 handshake, and significantly faster. Tor can use one of two built-in
24685 pure-C curve25519-donna implementations by Adam Langley, or it
24686 can link against the "nacl" library for a tuned version if present.
24688 The built-in version is very fast for 64-bit systems when building
24689 with GCC. The built-in 32-bit version is still faster than the
24690 old TAP protocol, but using libnacl is better on most such hosts.
24692 Clients don't currently use this protocol by default, since
24693 comparatively few clients support it so far. To try it, set
24694 UseNTorHandshake to 1.
24696 Implements proposal 216; closes ticket 7202.
24698 o Major features (better link encryption):
24699 - Relays can now enable the ECDHE TLS ciphersuites when available
24700 and appropriate. These ciphersuites let us negotiate forward-secure
24701 TLS secret keys more safely and more efficiently than with our
24702 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
24703 public relays prefer the (faster) P224 group, and bridges prefer
24704 the (more common) P256 group; you can override this with the
24707 Enabling these ciphers was a little tricky, since for a long time,
24708 clients had been claiming to support them without actually doing
24709 so, in order to foil fingerprinting. But with the client-side
24710 implementation of proposal 198 in 0.2.3.17-beta, clients can now
24711 match the ciphers from recent Firefox versions *and* list the
24712 ciphers they actually mean, so relays can believe such clients
24713 when they advertise ECDHE support in their TLS ClientHello messages.
24715 This feature requires clients running 0.2.3.17-beta or later,
24716 and requires both sides to be running OpenSSL 1.0.0 or later
24717 with ECC support. OpenSSL 1.0.1, with the compile-time option
24718 "enable-ec_nistp_64_gcc_128", is highly recommended.
24720 Implements the relay side of proposal 198; closes ticket 7200.
24723 - Avoid crashing when, as a relay without IPv6-exit support, a
24724 client insists on getting an IPv6 address or nothing. Fixes bug
24725 7814; bugfix on 0.2.4.7-alpha.
24728 - Improve circuit build timeout handling for hidden services.
24729 In particular: adjust build timeouts more accurately depending
24730 upon the number of hop-RTTs that a particular circuit type
24731 undergoes. Additionally, launch intro circuits in parallel
24732 if they timeout, and take the first one to reply as valid.
24733 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
24734 separate error codes; or at least, don't break for that reason.
24735 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
24736 - Update to the January 2 2013 Maxmind GeoLite Country database.
24738 o Minor features (testing):
24739 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
24740 (P-256) Diffie-Hellman handshakes to src/or/bench.
24741 - Add benchmark functions to test onion handshake performance.
24743 o Minor features (path bias detection):
24744 - Alter the Path Bias log messages to be more descriptive in terms
24745 of reporting timeouts and other statistics.
24746 - Create three levels of Path Bias log messages, as opposed to just
24747 two. These are configurable via consensus as well as via the torrc
24748 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
24749 The default values are 0.70, 0.50, and 0.30 respectively.
24750 - Separate the log message levels from the decision to drop guards,
24751 which also is available via torrc option PathBiasDropGuards.
24752 PathBiasDropGuards still defaults to 0 (off).
24753 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
24754 in combination with PathBiasExtremeRate.
24755 - Increase the default values for PathBiasScaleThreshold and
24756 PathBiasCircThreshold from (200, 20) to (300, 150).
24757 - Add in circuit usage accounting to path bias. If we try to use a
24758 built circuit but fail for any reason, it counts as path bias.
24759 Certain classes of circuits where the adversary gets to pick your
24760 destination node are exempt from this accounting. Usage accounting
24761 can be specifically disabled via consensus parameter or torrc.
24762 - Convert all internal path bias state to double-precision floating
24763 point, to avoid roundoff error and other issues.
24764 - Only record path bias information for circuits that have completed
24765 *two* hops. Assuming end-to-end tagging is the attack vector, this
24766 makes us more resilient to ambient circuit failure without any
24767 detection capability loss.
24769 o Minor bugfixes (log messages):
24770 - Rate-limit the "No circuits are opened. Relaxed timeout for a
24771 circuit with channel state open..." message to once per hour to
24772 keep it from filling the notice logs. Mitigates bug 7799 but does
24773 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
24774 - Avoid spurious warnings when configuring multiple client ports of
24775 which only some are nonlocal. Previously, we had claimed that some
24776 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
24779 o Code simplifications and refactoring:
24780 - Get rid of a couple of harmless clang warnings, where we compared
24781 enums to ints. These warnings are newly introduced in clang 3.2.
24782 - Split the onion.c file into separate modules for the onion queue
24783 and the different handshakes it supports.
24784 - Remove the marshalling/unmarshalling code for sending requests to
24785 cpuworkers over a socket, and instead just send structs. The
24786 recipient will always be the same Tor binary as the sender, so
24787 any encoding is overkill.
24790 Changes in version 0.2.4.7-alpha - 2012-12-24
24791 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
24792 directory mirrors for more robust bootstrapping; fixes more issues where
24793 clients with changing network conditions refuse to make any circuits;
24794 adds initial support for exiting to IPv6 addresses; resumes being able
24795 to update our GeoIP database, and includes the geoip6 file this time;
24796 turns off the client-side DNS cache by default due to privacy risks;
24797 and fixes a variety of other issues.
24799 o Major features (client resilience):
24800 - Add a new "FallbackDir" torrc option to use when we can't use
24801 a directory mirror from the consensus (either because we lack a
24802 consensus, or because they're all down). Currently, all authorities
24803 are fallbacks by default, and there are no other default fallbacks,
24804 but that will change. This option will allow us to give clients a
24805 longer list of servers to try to get a consensus from when first
24806 connecting to the Tor network, and thereby reduce load on the
24807 directory authorities. Implements proposal 206, "Preconfigured
24808 directory sources for bootstrapping". We also removed the old
24809 "FallbackNetworkstatus" option, since we never got it working well
24810 enough to use it. Closes bug 572.
24811 - If we have no circuits open, use a relaxed timeout (the
24812 95-percentile cutoff) until a circuit succeeds. This heuristic
24813 should allow Tor to succeed at building circuits even when the
24814 network connection drastically changes. Should help with bug 3443.
24816 o Major features (IPv6):
24817 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
24818 connectivity, then set the IPv6Exit flag to 1. Also make sure your
24819 exit policy reads as you would like: the address * applies to all
24820 address families, whereas *4 is IPv4 address only, and *6 is IPv6
24821 addresses only. On the client side, you'll need to wait until the
24822 authorities have upgraded, wait for enough exits to support IPv6,
24823 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
24824 ticket 5547, implements proposal 117 as revised in proposal 208.
24826 We DO NOT recommend that clients with actual anonymity needs start
24827 using IPv6 over Tor yet, since not enough exits support it yet.
24829 o Major features (geoip database):
24830 - Maxmind began labelling Tor relays as being in country "A1",
24831 which breaks by-country node selection inside Tor. Now we use a
24832 script to replace "A1" ("Anonymous Proxy") entries in our geoip
24833 file with real country codes. This script fixes about 90% of "A1"
24834 entries automatically and uses manual country code assignments to
24835 fix the remaining 10%. See src/config/README.geoip for details.
24836 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
24837 Country database, as modified above.
24839 o Major bugfixes (client-side DNS):
24840 - Turn off the client-side DNS cache by default. Updating and using
24841 the DNS cache is now configurable on a per-client-port
24842 level. SOCKSPort, DNSPort, etc lines may now contain
24843 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
24844 cache these types of DNS answers when we receive them from an
24845 exit node in response to an application request on this port, and
24846 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
24847 cached DNS answers of these types, we shouldn't use them. It's
24848 potentially risky to use cached DNS answers at the client, since
24849 doing so can indicate to one exit what answers we've gotten
24850 for DNS lookups in the past. With IPv6, this becomes especially
24851 problematic. Using cached DNS answers for requests on the same
24852 circuit would present less linkability risk, since all traffic
24853 on a circuit is already linkable, but it would also provide
24854 little performance benefit: the exit node caches DNS replies
24855 too. Implements a simplified version of Proposal 205. Implements
24858 o Major bugfixes (other):
24859 - Alter circuit build timeout measurement to start at the point
24860 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
24861 initialization). This should make our timeout measurements more
24862 uniform. Previously, we were sometimes including ORconn setup time
24863 in our circuit build time measurements. Should resolve bug 3443.
24864 - Fix an assertion that could trigger in hibernate_go_dormant() when
24865 closing an or_connection_t: call channel_mark_for_close() rather
24866 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
24868 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
24869 7655; bugfix on 0.2.4.6-alpha.
24872 - Add a new torrc option "ServerTransportListenAddr" to let bridge
24873 operators select the address where their pluggable transports will
24874 listen for connections. Resolves ticket 7013.
24875 - Allow an optional $ before the node identity digest in the
24876 controller command GETINFO ns/id/<identity>, for consistency with
24877 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
24878 - Log packaged cell fullness as part of the heartbeat message.
24879 Diagnosis to try to determine the extent of bug 7743.
24881 o Minor features (IPv6):
24882 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
24883 prefer to hand out virtual IPv6 addresses, since there are more of
24884 them and we can't run out. To override this behavior and make IPv4
24885 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
24886 or DNSPort you're using for resolving. Implements ticket 7571.
24887 - AutomapHostsOnResolve responses are now randomized, to avoid
24888 annoying situations where Tor is restarted and applications
24889 connect to the wrong addresses.
24890 - Never try more than 1000 times to pick a new virtual address when
24891 AutomapHostsOnResolve is set. That's good enough so long as we
24892 aren't close to handing out our entire virtual address space;
24893 if you're getting there, it's best to switch to IPv6 virtual
24897 - The ADDRMAP command can no longer generate an ill-formed error
24898 code on a failed MAPADDRESS. It now says "internal" rather than
24899 an English sentence fragment with spaces in the middle. Bugfix on
24900 Tor 0.2.0.19-alpha.
24901 - Fix log messages and comments to avoid saying "GMT" when we mean
24902 "UTC". Fixes bug 6113.
24903 - Compile on win64 using mingw64. Fixes bug 7260; patches from
24905 - Fix a crash when debugging unit tests on Windows: deallocate a
24906 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
24907 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
24910 - The DirServer option is now DirAuthority, for consistency with
24911 current naming patterns. You can still use the old DirServer form.
24913 o Code simplification and refactoring:
24914 - Move the client-side address-map/virtual-address/DNS-cache code
24915 out of connection_edge.c into a new addressmap.c module.
24916 - Remove unused code for parsing v1 directories and "running routers"
24917 documents. Fixes bug 6887.
24920 Changes in version 0.2.3.25 - 2012-11-19
24921 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
24922 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
24923 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
24924 programmer, and friend. Unstinting in his dedication to the cause of
24925 freedom, he inspired and helped many of us as we began our work on
24926 anonymity, and inspires us still. Please honor his memory by writing
24927 software to protect people's freedoms, and by helping others to do so.
24929 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
24930 significantly reduced directory overhead (via microdescriptors),
24931 enormous crypto performance improvements for fast relays on new
24932 enough hardware, a new v3 TLS handshake protocol that can better
24933 resist fingerprinting, support for protocol obfuscation plugins (aka
24934 pluggable transports), better scalability for hidden services, IPv6
24935 support for bridges, performance improvements like allowing clients
24936 to skip the first round-trip on the circuit ("optimistic data") and
24937 refilling token buckets more often, a new "stream isolation" design
24938 to isolate different applications on different circuits, and many
24939 stability, security, and privacy fixes.
24942 - Tor tries to wipe potentially sensitive data after using it, so
24943 that if some subsequent security failure exposes Tor's memory,
24944 the damage will be limited. But we had a bug where the compiler
24945 was eliminating these wipe operations when it decided that the
24946 memory was no longer visible to a (correctly running) program,
24947 hence defeating our attempt at defense in depth. We fix that
24948 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24949 is unlikely to optimize away. Future versions of Tor may use
24950 a less ridiculously heavy approach for this. Fixes bug 7352.
24951 Reported in an article by Andrey Karpov.
24954 - Fix a harmless bug when opting against publishing a relay descriptor
24955 because DisableNetwork is set. Fixes bug 7464; bugfix on
24959 Changes in version 0.2.4.6-alpha - 2012-11-13
24960 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
24961 makes our defense-in-depth memory wiping more reliable, and begins to
24962 count IPv6 addresses in bridge statistics,
24965 - Fix an assertion failure that could occur when closing a connection
24966 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
24968 - Tor tries to wipe potentially sensitive data after using it, so
24969 that if some subsequent security failure exposes Tor's memory,
24970 the damage will be limited. But we had a bug where the compiler
24971 was eliminating these wipe operations when it decided that the
24972 memory was no longer visible to a (correctly running) program,
24973 hence defeating our attempt at defense in depth. We fix that
24974 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24975 is unlikely to optimize away. Future versions of Tor may use
24976 a less ridiculously heavy approach for this. Fixes bug 7352.
24977 Reported in an article by Andrey Karpov.
24980 - Add GeoIP database for IPv6 addresses. The new config option
24982 - Bridge statistics now count bridge clients connecting over IPv6:
24983 bridge statistics files now list "bridge-ip-versions" and
24984 extra-info documents list "geoip6-db-digest". The control protocol
24985 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
24986 implementation by "shkoo", addressing ticket 5055.
24989 - Warn when we are binding low ports when hibernation is enabled;
24990 previously we had warned when we were _advertising_ low ports with
24991 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
24992 - Fix a harmless bug when opting against publishing a relay descriptor
24993 because DisableNetwork is set. Fixes bug 7464; bugfix on
24995 - Add warning message when a managed proxy dies during configuration.
24996 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
24997 - Fix a linking error when building tor-fw-helper without miniupnp.
24998 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
24999 - Check for closing an or_connection_t without going through correct
25000 channel functions; emit a warning and then call
25001 connection_or_close_for_error() so we don't assert as in bugs 7212
25003 - Compile correctly on compilers without C99 designated initializer
25004 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
25005 - Avoid a possible assert that can occur when channel_send_destroy() is
25006 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
25007 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
25008 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
25009 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
25010 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
25012 o Code simplification and refactoring:
25013 - Start using OpenBSD's implementation of queue.h, so that we don't
25014 need to hand-roll our own pointer and list structures whenever we
25015 need them. (We can't rely on a sys/queue.h, since some operating
25016 systems don't have them, and the ones that do have them don't all
25017 present the same extensions.)
25020 Changes in version 0.2.4.5-alpha - 2012-10-25
25021 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
25022 two important security vulnerabilities that could lead to remotely
25023 triggerable relay crashes, fix a major bug that was preventing clients
25024 from choosing suitable exit nodes, and refactor some of our code.
25026 o Major bugfixes (security, also in 0.2.3.24-rc):
25027 - Fix a group of remotely triggerable assertion failures related to
25028 incorrect link protocol negotiation. Found, diagnosed, and fixed
25029 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25031 - Fix a denial of service attack by which any directory authority
25032 could crash all the others, or by which a single v2 directory
25033 authority could crash everybody downloading v2 directory
25034 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25036 o Major bugfixes (also in 0.2.3.24-rc):
25037 - When parsing exit policy summaries from microdescriptors, we had
25038 previously been ignoring the last character in each one, so that
25039 "accept 80,443,8080" would be treated by clients as indicating
25040 a node that allows access to ports 80, 443, and 808. That would
25041 lead to clients attempting connections that could never work,
25042 and ignoring exit nodes that would support their connections. Now
25043 clients parse these exit policy summaries correctly. Fixes bug 7192;
25044 bugfix on 0.2.3.1-alpha.
25046 o Minor bugfixes (also in 0.2.3.24-rc):
25047 - Clients now consider the ClientRejectInternalAddresses config option
25048 when using a microdescriptor consensus stanza to decide whether
25049 an exit relay would allow exiting to an internal address. Fixes
25050 bug 7190; bugfix on 0.2.3.1-alpha.
25053 - Only disable TLS session ticket support when running as a TLS
25054 server. Now clients will blend better with regular Firefox
25055 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
25057 o Code simplification and refactoring:
25058 - Start using OpenBSD's implementation of queue.h (originally by
25060 - Move the entry node code from circuitbuild.c to its own file.
25061 - Move the circuit build timeout tracking code from circuitbuild.c
25065 Changes in version 0.2.3.24-rc - 2012-10-25
25066 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
25067 could lead to remotely triggerable relay crashes, and fixes
25068 a major bug that was preventing clients from choosing suitable exit
25071 o Major bugfixes (security):
25072 - Fix a group of remotely triggerable assertion failures related to
25073 incorrect link protocol negotiation. Found, diagnosed, and fixed
25074 by "some guy from France". Fix for CVE-2012-2250; bugfix on
25076 - Fix a denial of service attack by which any directory authority
25077 could crash all the others, or by which a single v2 directory
25078 authority could crash everybody downloading v2 directory
25079 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
25082 - When parsing exit policy summaries from microdescriptors, we had
25083 previously been ignoring the last character in each one, so that
25084 "accept 80,443,8080" would be treated by clients as indicating
25085 a node that allows access to ports 80, 443, and 808. That would
25086 lead to clients attempting connections that could never work,
25087 and ignoring exit nodes that would support their connections. Now
25088 clients parse these exit policy summaries correctly. Fixes bug 7192;
25089 bugfix on 0.2.3.1-alpha.
25092 - Clients now consider the ClientRejectInternalAddresses config option
25093 when using a microdescriptor consensus stanza to decide whether
25094 an exit relay would allow exiting to an internal address. Fixes
25095 bug 7190; bugfix on 0.2.3.1-alpha.
25098 Changes in version 0.2.4.4-alpha - 2012-10-20
25099 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
25100 vulnerability introduced by a change in OpenSSL, fixes a remotely
25101 triggerable assert, and adds new channel_t and circuitmux_t abstractions
25102 that will make it easier to test new connection transport and cell
25103 scheduling algorithms.
25105 o New directory authorities (also in 0.2.3.23-rc):
25106 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25107 authority. Closes ticket 5749.
25109 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
25110 - Disable TLS session tickets. OpenSSL's implementation was giving
25111 our TLS session keys the lifetime of our TLS context objects, when
25112 perfect forward secrecy would want us to discard anything that
25113 could decrypt a link connection as soon as the link connection
25114 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25115 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25116 - Discard extraneous renegotiation attempts once the V3 link
25117 protocol has been initiated. Failure to do so left us open to
25118 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25119 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25121 o Internal abstraction features:
25122 - Introduce new channel_t abstraction between circuits and
25123 or_connection_t to allow for implementing alternate OR-to-OR
25124 transports. A channel_t is an abstract object which can either be a
25125 cell-bearing channel, which is responsible for authenticating and
25126 handshaking with the remote OR and transmitting cells to and from
25127 it, or a listening channel, which spawns new cell-bearing channels
25128 at the request of remote ORs. Implements part of ticket 6465.
25129 - Also new is the channel_tls_t subclass of channel_t, adapting it
25130 to the existing or_connection_t code. The V2/V3 protocol handshaking
25131 code which formerly resided in command.c has been moved below the
25132 channel_t abstraction layer and may be found in channeltls.c now.
25133 Implements the rest of ticket 6465.
25134 - Introduce new circuitmux_t storing the queue of circuits for
25135 a channel; this encapsulates and abstracts the queue logic and
25136 circuit selection policy, and allows the latter to be overridden
25137 easily by switching out a policy object. The existing EWMA behavior
25138 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
25140 o Required libraries:
25141 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
25142 strongly recommended.
25145 - Warn users who run hidden services on a Tor client with
25146 UseEntryGuards disabled that their hidden services will be
25147 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
25148 attack which motivated Tor to support entry guards in the first
25149 place). Resolves ticket 6889.
25150 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
25151 dhill. Resolves ticket 6982.
25152 - Option OutboundBindAddress can be specified multiple times and
25153 accepts IPv6 addresses. Resolves ticket 6876.
25155 o Minor bugfixes (also in 0.2.3.23-rc):
25156 - Don't serve or accept v2 hidden service descriptors over a
25157 relay's DirPort. It's never correct to do so, and disabling it
25158 might make it more annoying to exploit any bugs that turn up in the
25159 descriptor-parsing code. Fixes bug 7149.
25160 - Fix two cases in src/or/transports.c where we were calling
25161 fmt_addr() twice in a parameter list. Bug found by David
25162 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
25163 - Fix memory leaks whenever we logged any message about the "path
25164 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25165 - When relays refuse a "create" cell because their queue of pending
25166 create cells is too big (typically because their cpu can't keep up
25167 with the arrival rate), send back reason "resource limit" rather
25168 than reason "internal", so network measurement scripts can get a
25169 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
25172 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
25173 - Free some more still-in-use memory at exit, to make hunting for
25174 memory leaks easier. Resolves bug 7029.
25175 - When a Tor client gets a "truncated" relay cell, the first byte of
25176 its payload specifies why the circuit was truncated. We were
25177 ignoring this 'reason' byte when tearing down the circuit, resulting
25178 in the controller not being told why the circuit closed. Now we
25179 pass the reason from the truncated cell to the controller. Bugfix
25180 on 0.1.2.3-alpha; fixes bug 7039.
25181 - Downgrade "Failed to hand off onionskin" messages to "debug"
25182 severity, since they're typically redundant with the "Your computer
25183 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
25184 - Make clients running with IPv6 bridges connect over IPv6 again,
25185 even without setting new config options ClientUseIPv6 and
25186 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
25187 - Use square brackets around IPv6 addresses in numerous places
25188 that needed them, including log messages, HTTPS CONNECT proxy
25189 requests, TransportProxy statefile entries, and pluggable transport
25190 extra-info lines. Fixes bug 7011; patch by David Fifield.
25192 o Code refactoring and cleanup:
25193 - Source files taken from other packages now reside in src/ext;
25194 previously they were scattered around the rest of Tor.
25195 - Avoid use of reserved identifiers in our C code. The C standard
25196 doesn't like us declaring anything that starts with an
25197 underscore, so let's knock it off before we get in trouble. Fix
25198 for bug 1031; bugfix on the first Tor commit.
25201 Changes in version 0.2.3.23-rc - 2012-10-20
25202 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
25203 vulnerability introduced by a change in OpenSSL, and fixes a variety
25204 of smaller bugs in preparation for the release.
25206 o New directory authorities:
25207 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
25208 authority. Closes ticket 5749.
25210 o Major bugfixes (security/privacy):
25211 - Disable TLS session tickets. OpenSSL's implementation was giving
25212 our TLS session keys the lifetime of our TLS context objects, when
25213 perfect forward secrecy would want us to discard anything that
25214 could decrypt a link connection as soon as the link connection
25215 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
25216 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
25217 - Discard extraneous renegotiation attempts once the V3 link
25218 protocol has been initiated. Failure to do so left us open to
25219 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
25220 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
25223 - Fix a possible crash bug when checking for deactivated circuits
25224 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25225 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25227 o Minor bugfixes (on 0.2.3.x):
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 - Convert an assert in the pathbias code to a log message. The assert
25232 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25233 bugfix on 0.2.3.17-beta.
25234 - Fix memory leaks whenever we logged any message about the "path
25235 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25237 o Minor bugfixes (on 0.2.2.x and earlier):
25238 - Don't serve or accept v2 hidden service descriptors over a relay's
25239 DirPort. It's never correct to do so, and disabling it might
25240 make it more annoying to exploit any bugs that turn up in the
25241 descriptor-parsing code. Fixes bug 7149.
25242 - When relays refuse a "create" cell because their queue of pending
25243 create cells is too big (typically because their cpu can't keep up
25244 with the arrival rate), send back reason "resource limit" rather
25245 than reason "internal", so network measurement scripts can get a
25246 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25247 - Correct file sizes when reading binary files on Cygwin, to avoid
25248 a bug where Tor would fail to read its state file. Fixes bug 6844;
25249 bugfix on 0.1.2.7-alpha.
25250 - Avoid undefined behavior when parsing the list of supported
25251 rendezvous/introduction protocols in a hidden service descriptor.
25252 Previously, Tor would have confused (as-yet-unused) protocol version
25253 numbers greater than 32 with lower ones on many platforms. Fixes
25254 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25256 o Documentation fixes:
25257 - Clarify that hidden services are TCP only. Fixes bug 6024.
25260 Changes in version 0.2.4.3-alpha - 2012-09-22
25261 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25262 assertion, resumes letting relays test reachability of their DirPort,
25263 and cleans up a bunch of smaller bugs.
25266 - Fix an assertion failure in tor_timegm() that could be triggered
25267 by a badly formatted directory object. Bug found by fuzzing with
25268 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25271 - Fix a possible crash bug when checking for deactivated circuits
25272 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25273 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25274 - Allow routers to detect that their own DirPorts are running. When
25275 we removed support for versions_supports_begindir, we also
25276 accidentally removed the mechanism we used to self-test our
25277 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25278 bugfix on 0.2.4.2-alpha.
25280 o Security features:
25281 - Switch to a completely time-invariant approach for picking nodes
25282 weighted by bandwidth. Our old approach would run through the
25283 part of the loop after it had made its choice slightly slower
25284 than it ran through the part of the loop before it had made its
25285 choice. Addresses ticket 6538.
25286 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25287 by tor2web clients allows hidden services to identify tor2web
25288 clients through their repeated selection of the same rendezvous
25289 and introduction point circuit endpoints (their guards). Resolves
25293 - Enable Tor to read configuration, state, and key information from
25294 a FIFO. Previously Tor would only read from files with a positive
25295 stat.st_size. Code from meejah; fixes bug 6044.
25298 - Correct file sizes when reading binary files on Cygwin, to avoid
25299 a bug where Tor would fail to read its state file. Fixes bug 6844;
25300 bugfix on 0.1.2.7-alpha.
25301 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25302 bugfix on 0.2.0.3-alpha.
25303 - When complaining about a client port on a public address, log
25304 which address we're complaining about. Fixes bug 4020; bugfix on
25305 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25306 - Convert an assert in the pathbias code to a log message. The assert
25307 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25308 bugfix on 0.2.3.17-beta.
25309 - Our new buildsystem was overzealous about rebuilding manpages: it
25310 would rebuild them all whenever any one of them changed. Now our
25311 dependency checking should be correct. Fixes bug 6843; bugfix on
25313 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25314 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25315 - Correct log printout about which address family is preferred
25316 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25317 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25319 o Minor bugfixes (code cleanliness):
25320 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25321 with large values. This situation was untriggered, but nevertheless
25322 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25323 - Reject consensus votes with more than 64 known-flags. We aren't even
25324 close to that limit yet, and our code doesn't handle it correctly.
25325 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25326 - Avoid undefined behavior when parsing the list of supported
25327 rendezvous/introduction protocols in a hidden service descriptor.
25328 Previously, Tor would have confused (as-yet-unused) protocol version
25329 numbers greater than 32 with lower ones on many platforms. Fixes
25330 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25331 - Fix handling of rendezvous client authorization types over 8.
25332 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25333 - Fix building with older versions of GCC (2.95, for one) that don't
25334 like preprocessor directives inside macro arguments. Found by
25335 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25336 - Switch weighted node selection rule from using a list of doubles
25337 to using a list of int64_t. This change should make the process
25338 slightly easier to debug and maintain. Needed to finish ticket 6538.
25340 o Code simplification and refactoring:
25341 - Move the generic "config" code into a new file, and have "config.c"
25342 hold only torrc- and state-related code. Resolves ticket 6823.
25343 - Move the core of our "choose a weighted element at random" logic
25344 into its own function, and give it unit tests. Now the logic is
25345 testable, and a little less fragile too.
25346 - Removed the testing_since field of node_t, which hasn't been used
25347 for anything since 0.2.0.9-alpha.
25349 o Documentation fixes:
25350 - Clarify that hidden services are TCP only. Fixes bug 6024.
25351 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25355 Changes in version 0.2.3.22-rc - 2012-09-11
25356 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25360 - Fix an assertion failure in tor_timegm() that could be triggered
25361 by a badly formatted directory object. Bug found by fuzzing with
25362 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25365 - Avoid segfault when starting up having run with an extremely old
25366 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25370 Changes in version 0.2.2.39 - 2012-09-11
25371 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25375 - Fix an assertion failure in tor_timegm() that could be triggered
25376 by a badly formatted directory object. Bug found by fuzzing with
25377 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25378 - Do not crash when comparing an address with port value 0 to an
25379 address policy. This bug could have been used to cause a remote
25380 assertion failure by or against directory authorities, or to
25381 allow some applications to crash clients. Fixes bug 6690; bugfix
25385 Changes in version 0.2.4.2-alpha - 2012-09-10
25386 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25387 raises the default rate limiting even more, and makes the bootstrapping
25388 log messages less noisy.
25391 - Automatically forward the TCP ports of pluggable transport
25392 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25396 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25397 to 1GB/1GB. The previous defaults were intended to be "basically
25398 infinite", but it turns out they're now limiting our 100mbit+
25399 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25400 last time we raised it).
25403 - Detect when we're running with a version of OpenSSL other than the
25404 one we compiled with. This has occasionally given people hard-to-
25406 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25407 versions and capabilities when everything is going right. Resolves
25408 part of ticket 6736.
25409 - Directory authorities no long accept descriptors for any version of
25410 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25411 These versions are insecure, unsupported, or both. Implements
25415 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25416 to start with a triple-underscore so the controller won't touch it.
25417 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25418 - Avoid segfault when starting up having run with an extremely old
25419 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25421 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25422 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25423 - Don't follow the NULL pointer if microdescriptor generation fails.
25424 (This does not appear to be triggerable, but it's best to be safe.)
25425 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25426 - Fix mis-declared dependencies on src/common/crypto.c and
25427 src/or/tor_main.c that could break out-of-tree builds under some
25428 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25429 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25430 6778; bugfix on 0.2.4.1-alpha.
25431 - Fix a harmless (in this case) build warning for implicitly
25432 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25434 o Removed features:
25435 - Now that all versions before 0.2.2.x are disallowed, we no longer
25436 need to work around their missing features. Thus we can remove a
25437 bunch of compatibility code.
25439 o Code refactoring:
25440 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25441 TCP ports to forward. In the past it only accepted two ports:
25442 the ORPort and the DirPort.
25445 Changes in version 0.2.4.1-alpha - 2012-09-05
25446 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
25447 bridgedb; lets relays use IPv6 addresses and directory authorities
25448 advertise them; and switches to a cleaner build interface.
25450 This is the first alpha release in a new series, so expect there to
25451 be bugs. Users who would rather test out a more stable branch should
25452 stay with 0.2.3.x for now.
25454 o Major features (bridges):
25455 - Bridges now report the pluggable transports they support to the
25456 bridge authority, so it can pass the supported transports on to
25457 bridgedb and/or eventually do reachability testing. Implements
25460 o Major features (IPv6):
25461 - Bridge authorities now accept IPv6 bridge addresses and include
25462 them in network status documents. Implements ticket 5534.
25463 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
25464 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
25465 to happen. Implements ticket 5535.
25466 - All kind of relays, not just bridges, can now advertise an IPv6
25467 OR port. Implements ticket 6362.
25468 - Directory authorities vote on IPv6 OR ports using the new consensus
25469 method 14. Implements ticket 6363.
25471 o Major features (build):
25472 - Switch to a nonrecursive Makefile structure. Now instead of each
25473 Makefile.am invoking other Makefile.am's, there is a master
25474 Makefile.am that includes the others. This change makes our build
25475 process slightly more maintainable, and improves parallelism for
25476 building with make -j. Original patch by Stewart Smith; various
25477 fixes by Jim Meyering.
25478 - Where available, we now use automake's "silent" make rules by
25479 default, so that warnings are easier to spot. You can get the old
25480 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
25482 o Minor features (code security and spec conformance):
25483 - Clear keys and key-derived material left on the stack in
25484 rendservice.c and rendclient.c. Check return value of
25485 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
25486 These fixes should make us more forward-secure against cold-boot
25487 attacks and the like. Fixes bug 2385.
25488 - Reject EXTEND cells sent to nonexistent streams. According to the
25489 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
25490 we were only checking for stream IDs that were currently in use.
25491 Found while hunting for more instances of bug 6271. Bugfix on
25492 0.0.2pre8, which introduced incremental circuit construction.
25494 o Minor features (streamlining);
25495 - No longer include the "opt" prefix when generating routerinfos
25496 or v2 directories: it has been needless since Tor 0.1.2. Closes
25498 - Remove some now-needless code that tried to aggressively flush
25499 OR connections as data was added to them. Since 0.2.0.1-alpha, our
25500 cell queue logic has saved us from the failure mode that this code
25501 was supposed to prevent. Removing this code will limit the number
25502 of baroque control flow paths through Tor's network logic. Reported
25503 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
25505 o Minor features (controller):
25506 - Add a "GETINFO signal/names" control port command. Implements
25508 - Provide default values for all options via "GETINFO config/defaults".
25509 Implements ticket 4971.
25511 o Minor features (IPv6):
25512 - New config option "AuthDirHasIPv6Connectivity 1" that directory
25513 authorities should set if they have IPv6 connectivity and want to
25514 do reachability tests for IPv6 relays. Implements feature 5974.
25515 - A relay with an IPv6 OR port now sends that address in NETINFO
25516 cells (in addition to its other address). Implements ticket 6364.
25518 o Minor features (log messages):
25519 - Omit the first heartbeat log message, because it never has anything
25520 useful to say, and it clutters up the bootstrapping messages.
25521 Resolves ticket 6758.
25522 - Don't log about reloading the microdescriptor cache at startup. Our
25523 bootstrap warnings are supposed to tell the user when there's a
25524 problem, and our bootstrap notices say when there isn't. Resolves
25525 ticket 6759; bugfix on 0.2.2.6-alpha.
25526 - Don't log "I learned some more directory information" when we're
25527 reading cached directory information. Reserve it for when new
25528 directory information arrives in response to a fetch. Resolves
25530 - Prevent rounding error in path bias counts when scaling
25531 them down, and use the correct scale factor default. Also demote
25532 some path bias related log messages down a level and make others
25533 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
25534 - We no longer warn so much when generating manpages from their
25537 o Code simplifications and refactoring:
25538 - Enhance our internal sscanf replacement so that we can eliminate
25539 the last remaining uses of the system sscanf. (Though those uses
25540 of sscanf were safe, sscanf itself is generally error prone, so
25541 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
25543 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
25544 - Move last_reachable and testing_since from routerinfo_t to node_t.
25545 Implements ticket 5529.
25546 - Add replaycache_t structure, functions and unit tests, then refactor
25547 rend_service_introduce() to be more clear to read, improve, debug,
25548 and test. Resolves bug 6177.
25549 - Finally remove support for malloc_good_size and malloc_usable_size.
25550 We had hoped that these functions would let us eke a little more
25551 memory out of our malloc implementation. Unfortunately, the only
25552 implementations that provided these functions are also ones that
25553 are already efficient about not overallocation: they never got us
25554 more than 7 or so bytes per allocation. Removing them saves us a
25555 little code complexity and a nontrivial amount of build complexity.
25557 o New requirements:
25558 - Tor maintainers now require Automake version 1.9 or later to build
25559 Tor from the Git repository. (Automake is not required when building
25560 from a source distribution.)
25563 Changes in version 0.2.3.21-rc - 2012-09-05
25564 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25565 series. It fixes a trio of potential security bugs, fixes a bug where
25566 we were leaving some of the fast relays out of the microdescriptor
25567 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25568 and cleans up other smaller issues.
25570 o Major bugfixes (security):
25571 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25572 could use this trick to make their circuits receive cells faster
25573 than our flow control would have allowed, or to gum up the network,
25574 or possibly to do targeted memory denial-of-service attacks on
25575 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25576 from July 2002, before the release of Tor 0.0.0. We had committed
25577 this patch previously, but we had to revert it because of bug 6271.
25578 Now that 6271 is fixed, this patch appears to work.
25579 - Reject any attempt to extend to an internal address. Without
25580 this fix, a router could be used to probe addresses on an internal
25581 network to see whether they were accepting connections. Fixes bug
25582 6710; bugfix on 0.0.8pre1.
25583 - Do not crash when comparing an address with port value 0 to an
25584 address policy. This bug could have been used to cause a remote
25585 assertion failure by or against directory authorities, or to
25586 allow some applications to crash clients. Fixes bug 6690; bugfix
25590 - Remove the upper bound on microdescriptor length. We were hitting
25591 the limit for routers with complex exit policies or family
25592 declarations, causing clients to not use them. Fixes the first
25593 piece of bug 6404; fix on 0.2.2.6-alpha.
25594 - Detect "ORPort 0" as meaning, uniformly, that we're not running
25595 as a relay. Previously, some of our code would treat the presence
25596 of any ORPort line as meaning that we should act like a relay,
25597 even though our new listener code would correctly not open any
25598 ORPorts for ORPort 0. Similar bugs in other Port options are also
25599 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
25602 - Avoid a pair of double-free and use-after-mark bugs that can
25603 occur with certain timings in canceled and re-received DNS
25604 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
25605 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
25606 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
25607 - Allow one-hop directory fetching circuits the full "circuit build
25608 timeout" period, rather than just half of it, before failing them
25609 and marking the relay down. This fix should help reduce cases where
25610 clients declare relays (or worse, bridges) unreachable because
25611 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
25612 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
25614 - Authorities no longer include any router in their microdescriptor
25615 consensuses for which they couldn't generate or agree on a
25616 microdescriptor. Fixes the second piece of bug 6404; fix on
25618 - Detect and reject attempts to specify both "FooPort" and
25619 "FooPort 0" in the same configuration domain. (It's still okay
25620 to have a FooPort in your configuration file, and use "FooPort 0"
25621 on the command line to disable it.) Fixes the second half of bug
25622 6507; bugfix on 0.2.3.3-alpha.
25623 - Make wildcarded addresses (that is, ones beginning with "*.") work
25624 when provided via the controller's MapAddress command. Previously,
25625 they were accepted, but we never actually noticed that they were
25626 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
25627 - Avoid crashing on a malformed state file where EntryGuardPathBias
25628 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
25629 - Add a (probably redundant) memory clear between iterations of
25630 the router status voting loop, to prevent future coding errors
25631 where data might leak between iterations of the loop. Resolves
25634 o Minor bugfixes (log messages):
25635 - Downgrade "set buildtimeout to low value" messages to "info"
25636 severity; they were never an actual problem, there was never
25637 anything reasonable to do about them, and they tended to spam logs
25638 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
25639 - Downgrade path-bias warning messages to "info". We'll try to get
25640 them working better in 0.2.4. Add internal circuit construction
25641 state to protect against the noisy warn message "Unexpectedly high
25642 circuit_successes". Also add some additional rate-limited notice
25643 messages to help determine the root cause of the warn. Fixes bug
25644 6475. Bugfix against 0.2.3.17-beta.
25645 - Move log message when unable to find a microdesc in a routerstatus
25646 entry to parse time. Previously we'd spam this warning every time
25647 we tried to figure out which microdescriptors to download. Fixes
25648 the third piece of bug 6404; fix on 0.2.3.18-rc.
25651 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
25652 change when the authority is deciding whether to accept a newly
25653 uploaded descriptor. Implements ticket 6423.
25654 - Add missing documentation for consensus and microdesc files.
25655 Resolves ticket 6732.
25658 Changes in version 0.2.2.38 - 2012-08-12
25659 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
25660 attack that could in theory leak path information.
25663 - Avoid an uninitialized memory read when reading a vote or consensus
25664 document that has an unrecognized flavor name. This read could
25665 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25666 - Try to leak less information about what relays a client is
25667 choosing to a side-channel attacker. Previously, a Tor client would
25668 stop iterating through the list of available relays as soon as it
25669 had chosen one, thus finishing a little earlier when it picked
25670 a router earlier in the list. If an attacker can recover this
25671 timing information (nontrivial but not proven to be impossible),
25672 they could learn some coarse-grained information about which relays
25673 a client was picking (middle nodes in particular are likelier to
25674 be affected than exits). The timing attack might be mitigated by
25675 other factors (see bug 6537 for some discussion), but it's best
25676 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25679 Changes in version 0.2.3.20-rc - 2012-08-05
25680 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
25681 series. It fixes a pair of code security bugs and a potential anonymity
25682 issue, updates our RPM spec files, and cleans up other smaller issues.
25685 - Avoid read-from-freed-memory and double-free bugs that could occur
25686 when a DNS request fails while launching it. Fixes bug 6480;
25687 bugfix on 0.2.0.1-alpha.
25688 - Avoid an uninitialized memory read when reading a vote or consensus
25689 document that has an unrecognized flavor name. This read could
25690 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25691 - Try to leak less information about what relays a client is
25692 choosing to a side-channel attacker. Previously, a Tor client would
25693 stop iterating through the list of available relays as soon as it
25694 had chosen one, thus finishing a little earlier when it picked
25695 a router earlier in the list. If an attacker can recover this
25696 timing information (nontrivial but not proven to be impossible),
25697 they could learn some coarse-grained information about which relays
25698 a client was picking (middle nodes in particular are likelier to
25699 be affected than exits). The timing attack might be mitigated by
25700 other factors (see bug 6537 for some discussion), but it's best
25701 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25704 - Try to make the warning when giving an obsolete SOCKSListenAddress
25705 a little more useful.
25706 - Terminate active server managed proxies if Tor stops being a
25707 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
25708 - Provide a better error message about possible OSX Asciidoc failure
25709 reasons. Fixes bug 6436.
25710 - Warn when Tor is configured to use accounting in a way that can
25711 link a hidden service to some other hidden service or public
25712 address. Resolves ticket 6490.
25715 - Check return value of fputs() when writing authority certificate
25716 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
25717 - Ignore ServerTransportPlugin lines when Tor is not configured as
25718 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
25719 - When disabling guards for having too high a proportion of failed
25720 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
25724 - Update our default RPM spec files to work with mock and rpmbuild
25725 on RHEL/Fedora. They have an updated set of dependencies and
25726 conflicts, a fix for an ancient typo when creating the "_tor"
25727 user, and better instructions. Thanks to Ondrej Mikle for the
25728 patch series. Fixes bug 6043.
25731 - Make it possible to set the TestingTorNetwork configuration
25732 option using AlternateDirAuthority and AlternateBridgeAuthority
25733 as an alternative to setting DirServer. Addresses ticket 6377.
25736 - Clarify the documentation for the Alternate*Authority options.
25738 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
25740 o Code simplification and refactoring:
25741 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
25742 10 lines. Also, don't nest them. Doing so in the past has
25743 led to hard-to-debug code. The new style is to use the
25744 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
25747 Changes in version 0.2.3.19-rc - 2012-07-06
25748 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
25749 series. It fixes the compile on Windows, reverts to a GeoIP database
25750 that isn't as broken, and fixes a flow control bug that has been around
25751 since the beginning of Tor.
25754 - Fix a bug handling SENDME cells on nonexistent streams that could
25755 result in bizarre window values. Report and patch contributed
25756 pseudonymously. Fixes part of bug 6271. This bug was introduced
25757 before the first Tor release, in svn commit r152.
25758 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
25759 June 2012 database, Maxmind marked many Tor relays as country "A1",
25760 which will cause risky behavior for clients that set EntryNodes
25761 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
25762 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
25763 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
25766 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
25767 bugfix on 0.2.1.10-alpha.
25770 Changes in version 0.2.3.18-rc - 2012-06-28
25771 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
25772 series. It fixes a few smaller bugs, but generally appears stable.
25773 Please test it and let us know whether it is!
25776 - Allow wildcarded mapaddress targets to be specified on the
25777 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
25778 - Make our linker option detection code more robust against linkers
25779 such as on FreeBSD 8, where a bad combination of options completes
25780 successfully but makes an unrunnable binary. Fixes bug 6173;
25781 bugfix on 0.2.3.17-beta.
25783 o Minor bugfixes (on 0.2.2.x and earlier):
25784 - Avoid a false positive in the util/threads unit test by increasing
25785 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
25786 - Replace "Sending publish request" log messages with "Launching
25787 upload", so that they no longer confusingly imply that we're
25788 sending something to a directory we might not even be connected
25789 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
25790 - Make sure to set *socket_error in all error cases in
25791 connection_connect(), so it can't produce a warning about
25792 errno being zero from errno_to_orconn_end_reason(). Bugfix on
25793 0.2.1.1-alpha; resolves ticket 6028.
25794 - Downgrade "Got a certificate, but we already have it" log messages
25795 from warning to info, except when we're a dirauth. Fixes bug 5238;
25796 bugfix on 0.2.1.7-alpha.
25797 - When checking for requested signatures on the latest consensus
25798 before serving it to a client, make sure to check the right
25799 consensus flavor. Bugfix on 0.2.2.6-alpha.
25800 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
25801 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
25803 o Minor bugfixes (on 0.2.3.x):
25804 - Make format_helper_exit_status() avoid unnecessary space padding
25805 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
25807 - Downgrade a message about cleaning the microdescriptor cache to
25808 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
25809 - Log a BUG message at severity INFO if we have a networkstatus with
25810 a missing entry for some microdescriptor. Continues on a patch
25812 - Improve the log message when a managed proxy fails to launch. Fixes
25813 bug 5099; bugfix on 0.2.3.6-alpha.
25814 - Don't do DNS lookups when parsing corrupted managed proxy protocol
25815 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
25816 - When formatting wildcarded address mappings for the controller,
25817 be sure to include "*." as appropriate. Partially fixes bug 6244;
25818 bugfix on 0.2.3.9-alpha.
25819 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
25820 Bugfix on 0.2.3.13-alpha.
25821 - Stop logging messages about running with circuit timeout learning
25822 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
25823 - Disable a spurious warning about reading on a marked and flushing
25824 connection. We shouldn't be doing that, but apparently we
25825 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
25826 - Fix a bug that stopped AllowDotExit from working on addresses
25827 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
25830 o Code simplification, refactoring, unit tests:
25831 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
25832 Libevent's notion of cached time when possible.
25833 - Remove duplicate code for invoking getrlimit() from control.c.
25834 - Add a unit test for the environment_variable_names_equal function.
25837 - Document the --defaults-torrc option, and the new (in 0.2.3)
25838 semantics for overriding, extending, and clearing lists of
25839 options. Closes bug 4748.
25842 Changes in version 0.2.3.17-beta - 2012-06-15
25843 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
25844 gets our TLS handshake back on track for being able to blend in with
25845 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
25846 with Vidalia, and otherwise continues to get us closer to a release
25850 - Enable gcc and ld hardening by default. Resolves ticket 5210.
25851 - Update TLS cipher list to match Firefox 8 and later. Resolves
25853 - Implement the client side of proposal 198: remove support for
25854 clients falsely claiming to support standard ciphersuites that
25855 they can actually provide. As of modern OpenSSL versions, it's not
25856 necessary to fake any standard ciphersuite, and doing so prevents
25857 us from using better ciphersuites in the future, since servers
25858 can't know whether an advertised ciphersuite is really supported or
25859 not. Some hosts -- notably, ones with very old versions of OpenSSL
25860 or where OpenSSL has been built with ECC disabled -- will stand
25861 out because of this change; TBB users should not be affected.
25864 - Change the default value for DynamicDHGroups (introduced in
25865 0.2.3.9-alpha) to 0. This feature can make Tor relays less
25866 identifiable by their use of the mod_ssl DH group, but at
25867 the cost of some usability (#4721) and bridge tracing (#6087)
25868 regressions. Resolves ticket 5598.
25869 - Send a CRLF at the end of each STATUS_* control protocol event. This
25870 bug tickled a bug in Vidalia which would make it freeze. Fixes
25871 bug 6094; bugfix on 0.2.3.16-alpha.
25874 - Disable writing on marked-for-close connections when they are
25875 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
25876 bug 5263; bugfix on 0.0.2pre13, where we first added a special
25877 case for flushing marked connections.
25878 - Detect SSL handshake even when the initial attempt to write the
25879 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
25880 - Change the AllowDotExit rules so they should actually work.
25881 We now enforce AllowDotExit only immediately after receiving an
25882 address via SOCKS or DNSPort: other sources are free to provide
25883 .exit addresses after the resolution occurs. Fixes bug 3940;
25884 bugfix on 0.2.2.1-alpha.
25885 - Fix a (harmless) integer overflow in cell statistics reported by
25886 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
25887 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
25888 right places and never depends on the consensus parameters or
25889 computes adaptive timeouts when it is disabled. Fixes bug 5049;
25890 bugfix on 0.2.2.14-alpha.
25891 - When building Tor on Windows with -DUNICODE (not default), ensure
25892 that error messages, filenames, and DNS server names are always
25893 NUL-terminated when we convert them to a single-byte encoding.
25894 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
25895 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
25896 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
25897 - Fix an edge case where TestingTorNetwork is set but the authorities
25898 and relays all have an uptime of zero, where the private Tor network
25899 could briefly lack support for hidden services. Fixes bug 3886;
25900 bugfix on 0.2.2.18-alpha.
25901 - Correct the manpage's descriptions for the default values of
25902 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
25904 - Fix the documentation for the --hush and --quiet command line
25905 options, which changed their behavior back in 0.2.3.3-alpha.
25906 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
25910 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
25911 more information to it, so that we can track it down in case it
25912 returns again. Mitigates bug 5235.
25913 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
25914 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
25915 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
25916 - Warn the user when HTTPProxy, but no other proxy type, is
25917 configured. This can cause surprising behavior: it doesn't send
25918 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
25919 directory traffic only. Resolves ticket 4663.
25920 - Issue a notice if a guard completes less than 40% of your circuits.
25921 Threshold is configurable by torrc option PathBiasNoticeRate and
25922 consensus parameter pb_noticepct. There is additional, off-by-
25923 default code to disable guards which fail too many circuits.
25924 Addresses ticket 5458.
25925 - Update to the June 6 2012 Maxmind GeoLite Country database.
25927 o Code simplifications and refactoring:
25928 - Remove validate_pluggable_transports_config(): its warning
25929 message is now handled by connection_or_connect().
25932 Changes in version 0.2.2.37 - 2012-06-06
25933 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
25934 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25938 - Work around a bug in OpenSSL that broke renegotiation with TLS
25939 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25940 the v2 Tor connection protocol when both sides were using OpenSSL
25941 1.0.1 would fail. Resolves ticket 6033.
25942 - When waiting for a client to renegotiate, don't allow it to add
25943 any bytes to the input buffer. This fixes a potential DoS issue.
25944 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25945 - Fix an edge case where if we fetch or publish a hidden service
25946 descriptor, we might build a 4-hop circuit and then use that circuit
25947 for exiting afterwards -- even if the new last hop doesn't obey our
25948 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25951 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25952 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25955 - Tell GCC and Clang to check for any errors in format strings passed
25956 to the tor_v*(print|scan)f functions.
25959 Changes in version 0.2.3.16-alpha - 2012-06-05
25960 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
25961 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25962 currently). It also fixes a variety of smaller bugs and other cleanups
25963 that get us closer to a release candidate.
25965 o Major bugfixes (general):
25966 - Work around a bug in OpenSSL that broke renegotiation with TLS
25967 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25968 the v2 Tor connection protocol when both sides were using OpenSSL
25969 1.0.1 would fail. Resolves ticket 6033.
25970 - When waiting for a client to renegotiate, don't allow it to add
25971 any bytes to the input buffer. This fixes a potential DoS issue.
25972 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25973 - Pass correct OR address to managed proxies (like obfsproxy),
25974 even when ORListenAddress is used. Fixes bug 4865; bugfix on
25976 - The advertised platform of a router now includes only its operating
25977 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
25978 service pack level (for Windows) or its CPU architecture (for Unix).
25979 We also no longer include the "git-XYZ" tag in the version. Resolves
25982 o Major bugfixes (clients):
25983 - If we are unable to find any exit that supports our predicted ports,
25984 stop calling them predicted, so that we don't loop and build
25985 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
25986 which introduced predicted ports.
25987 - Fix an edge case where if we fetch or publish a hidden service
25988 descriptor, we might build a 4-hop circuit and then use that circuit
25989 for exiting afterwards -- even if the new last hop doesn't obey our
25990 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25991 - Check at each new consensus whether our entry guards were picked
25992 long enough ago that we should rotate them. Previously, we only
25993 did this check at startup, which could lead to us holding a guard
25994 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
25995 - When fetching a bridge descriptor from a bridge authority,
25996 always do so anonymously, whether we have been able to open
25997 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
25998 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
25999 but we'll need to wait for bug 6010 before it's actually usable.
26001 o Major bugfixes (directory authorities):
26002 - When computing weight parameters, behave more robustly in the
26003 presence of a bad bwweightscale value. Previously, the authorities
26004 would crash if they agreed on a sufficiently broken weight_scale
26005 value: now, they use a reasonable default and carry on. Partial
26006 fix for 5786; bugfix on 0.2.2.17-alpha.
26007 - Check more thoroughly to prevent a rogue authority from
26008 double-voting on any consensus directory parameter. Previously,
26009 authorities would crash in this case if the total number of
26010 votes for any parameter exceeded the number of active voters,
26011 but would let it pass otherwise. Partial fix for bug 5786; bugfix
26015 - Rate-limit log messages when asked to connect anonymously to
26016 a private address. When these hit, they tended to hit fast and
26017 often. Also, don't bother trying to connect to addresses that we
26018 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
26019 reply makes us think we have been lied to, even when the address the
26020 client tried to connect to was "localhost." Resolves ticket 2822.
26021 - Allow packagers to insert an extra string in server descriptor
26022 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
26023 Resolves the rest of ticket 2988.
26024 - Raise the threshold of server descriptors needed (75%) and exit
26025 server descriptors needed (50%) before we will declare ourselves
26026 bootstrapped. This will make clients start building circuits a
26027 little later, but makes the initially constructed circuits less
26028 skewed and less in conflict with further directory fetches. Fixes
26030 - Close any connection that sends unrecognized junk before the
26031 handshake. Solves an issue noted in bug 4369.
26032 - Improve log messages about managed transports. Resolves ticket 5070.
26033 - Tag a bridge's descriptor as "never to be sent unencrypted".
26034 This shouldn't matter, since bridges don't open non-anonymous
26035 connections to the bridge authority and don't allow unencrypted
26036 directory connections from clients, but we might as well make
26037 sure. Closes bug 5139.
26038 - Expose our view of whether we have gone dormant to the controller,
26039 via a new "GETINFO dormant" value. Torbutton and other controllers
26040 can use this to avoid doing periodic requests through Tor while
26041 it's dormant (bug 4718). Fixes bug 5954.
26042 - Tell GCC and Clang to check for any errors in format strings passed
26043 to the tor_v*(print|scan)f functions.
26044 - Update to the May 1 2012 Maxmind GeoLite Country database.
26046 o Minor bugfixes (already included in 0.2.2.36):
26047 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26048 Fixes bug 5346; bugfix on 0.0.8pre3.
26049 - Correct parsing of certain date types in parse_http_time().
26050 Without this patch, If-Modified-Since would behave
26051 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26052 Esteban Manchado Velázques.
26053 - Make our number-parsing functions always treat too-large values
26054 as an error, even when those values exceed the width of the
26055 underlying type. Previously, if the caller provided these
26056 functions with minima or maxima set to the extreme values of the
26057 underlying integer type, these functions would return those
26058 values on overflow rather than treating overflow as an error.
26059 Fixes part of bug 5786; bugfix on 0.0.9.
26060 - If we hit the error case where routerlist_insert() replaces an
26061 existing (old) server descriptor, make sure to remove that
26062 server descriptor from the old_routers list. Fix related to bug
26063 1776. Bugfix on 0.2.2.18-alpha.
26064 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26065 circuits. Fixes issue 5259.
26067 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
26068 - Prevent a null-pointer dereference when receiving a data cell
26069 for a nonexistent stream when the circuit in question has an
26070 empty deliver window. We don't believe this is triggerable,
26071 since we don't currently allow deliver windows to become empty,
26072 but the logic is tricky enough that it's better to make the code
26073 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
26074 - Fix a memory leak when trying to launch a DNS request when the
26075 network is disabled or the nameservers are unconfigurable. Fixes
26076 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
26077 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
26078 - Don't hold a Windows file handle open for every file mapping;
26079 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
26081 - Avoid O(n^2) performance characteristics when parsing a large
26082 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
26083 - Format more doubles with %f, not %lf. Patch from grarpamp to make
26084 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
26086 - Make our replacement implementation of strtok_r() compatible with
26087 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
26088 bugfix on 0.2.2.1-alpha.
26089 - Fix a NULL-pointer dereference on a badly formed
26090 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
26091 bugfix on 0.2.2.9-alpha.
26092 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
26093 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
26094 - Defensively refactor rend_mid_rendezvous() so that protocol
26095 violations and length checks happen in the beginning. Fixes
26097 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
26098 that IPv6 stuff will compile on MSVC, and compilation issues
26099 will be easier to track down. Fixes bug 5861.
26101 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
26102 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
26103 resource exhaustion, so that clients can adjust their load to
26104 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
26105 started using END_STREAM_REASON_RESOURCELIMIT.
26106 - Don't check for whether the address we're using for outbound
26107 connections has changed until after the outbound connection has
26108 completed. On Windows, getsockname() doesn't succeed until the
26109 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
26110 - If the configuration tries to set MyFamily on a bridge, refuse to
26111 do so, and warn about the security implications. Fixes bug 4657;
26112 bugfix on 0.2.0.3-alpha.
26113 - If the client fails to set a reasonable set of ciphersuites
26114 during its v2 handshake renegotiation, allow the renegotiation to
26115 continue nevertheless (i.e. send all the required certificates).
26116 Fixes bug 4591; bugfix on 0.2.0.20-rc.
26117 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
26118 option is set to 0 (which Vidalia version 0.2.16 now does when
26119 a SAVECONF attempt fails), perform other actions that SIGHUP
26120 usually causes (like reopening the logs). Fixes bug 5095; bugfix
26122 - If we fail to write a microdescriptor to the disk cache, do not
26123 continue replacing the old microdescriptor file. Fixes bug 2954;
26124 bugfix on 0.2.2.6-alpha.
26125 - Exit nodes don't need to fetch certificates for authorities that
26126 they don't recognize; only directory authorities, bridges,
26127 and caches need to do that. Fixes part of bug 2297; bugfix on
26129 - Correctly handle checking the permissions on the parent
26130 directory of a control socket in the root directory. Bug found
26131 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
26133 - When told to add a bridge with the same digest as a preexisting
26134 bridge but a different addr:port, change the addr:port as
26135 requested. Previously we would not notice the change. Fixes half
26136 of bug 5603; fix on 0.2.2.26-beta.
26137 - End AUTHCHALLENGE error messages (in the control protocol) with
26138 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
26140 o Minor bugfixes (on 0.2.3.x):
26141 - Turn an assertion (that the number of handshakes received as a
26142 server is not < 1) into a warning. Fixes bug 4873; bugfix on
26144 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
26145 we had reversed them when the answer was cached.) Fixes bug
26146 5723; bugfix on 0.2.3.1-alpha.
26147 - Work correctly on Linux systems with accept4 support advertised in
26148 their headers, but without accept4 support in the kernel. Fix
26149 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
26150 - When told to add a bridge with the same addr:port as a preexisting
26151 bridge but a different transport, change the transport as
26152 requested. Previously we would not notice the change. Fixes half
26153 of bug 5603; fix on 0.2.3.2-alpha.
26154 - Avoid a "double-reply" warning when replying to a SOCKS request
26155 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
26156 bugfix on 0.2.3.4-alpha.
26157 - Fix a bug where a bridge authority crashes if it has seen no
26158 directory requests when it's time to write statistics to disk.
26159 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
26161 - Don't try to open non-control listeners when DisableNetwork is set.
26162 Previously, we'd open all listeners, then immediately close them.
26163 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
26164 - Don't abort the managed proxy protocol if the managed proxy
26165 sends us an unrecognized line; ignore it instead. Fixes bug
26166 5910; bugfix on 0.2.3.9-alpha.
26167 - Fix a compile warning in crypto.c when compiling with clang 3.1.
26168 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
26169 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
26170 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
26171 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
26172 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
26173 - Resolve numerous small warnings and build issues with MSVC. Resolves
26176 o Documentation fixes:
26177 - Improve the manual's documentation for the NT Service command-line
26178 options. Addresses ticket 3964.
26179 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
26180 - Document the changes to the ORPort and DirPort options, and the
26181 fact that {OR/Dir}ListenAddress is now unnecessary (and
26182 therefore deprecated). Resolves ticket 5597.
26185 - Remove the torrc.bridge file: we don't use it for anything, and
26186 it had become badly desynchronized from torrc.sample. Resolves
26190 Changes in version 0.2.2.36 - 2012-05-24
26191 Tor 0.2.2.36 updates the addresses for two of the eight directory
26192 authorities, fixes some potential anonymity and security issues,
26193 and fixes several crash bugs.
26195 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
26196 known flaws, and nobody should be using them. You should upgrade. If
26197 you're using a Linux or BSD and its packages are obsolete, stop using
26198 those packages and upgrade anyway.
26200 o Directory authority changes:
26201 - Change IP address for maatuska (v3 directory authority).
26202 - Change IP address for ides (v3 directory authority), and rename
26206 - When building or running with any version of OpenSSL earlier
26207 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26208 versions have a bug (CVE-2011-4576) in which their block cipher
26209 padding includes uninitialized data, potentially leaking sensitive
26210 information to any peer with whom they make a SSLv3 connection. Tor
26211 does not use SSL v3 by default, but a hostile client or server
26212 could force an SSLv3 connection in order to gain information that
26213 they shouldn't have been able to get. The best solution here is to
26214 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26215 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26216 to make sure that the bug can't happen.
26217 - Never use a bridge or a controller-supplied node as an exit, even
26218 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26219 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26220 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26221 - Only build circuits if we have a sufficient threshold of the total
26222 descriptors that are marked in the consensus with the "Exit"
26223 flag. This mitigates an attack proposed by wanoskarnet, in which
26224 all of a client's bridges collude to restrict the exit nodes that
26225 the client knows about. Fixes bug 5343.
26226 - Provide controllers with a safer way to implement the cookie
26227 authentication mechanism. With the old method, if another locally
26228 running program could convince a controller that it was the Tor
26229 process, then that program could trick the controller into telling
26230 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26231 authentication method uses a challenge-response approach to prevent
26232 this attack. Fixes bug 5185; implements proposal 193.
26235 - Avoid logging uninitialized data when unable to decode a hidden
26236 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26237 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26238 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26240 - Fix builds when the path to sed, openssl, or sha1sum contains
26241 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26243 - Correct our replacements for the timeradd() and timersub() functions
26244 on platforms that lack them (for example, Windows). The timersub()
26245 function is used when expiring circuits, while timeradd() is
26246 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26247 bugfix on 0.2.2.24-alpha.
26248 - Fix the SOCKET_OK test that we use to tell when socket
26249 creation fails so that it works on Win64. Fixes part of bug 4533;
26250 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26253 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26254 Fixes bug 5346; bugfix on 0.0.8pre3.
26255 - Make our number-parsing functions always treat too-large values
26256 as an error, even when those values exceed the width of the
26257 underlying type. Previously, if the caller provided these
26258 functions with minima or maxima set to the extreme values of the
26259 underlying integer type, these functions would return those
26260 values on overflow rather than treating overflow as an error.
26261 Fixes part of bug 5786; bugfix on 0.0.9.
26262 - Older Linux kernels erroneously respond to strange nmap behavior
26263 by having accept() return successfully with a zero-length
26264 socket. When this happens, just close the connection. Previously,
26265 we would try harder to learn the remote address: but there was
26266 no such remote address to learn, and our method for trying to
26267 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26268 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26269 - Correct parsing of certain date types in parse_http_time().
26270 Without this patch, If-Modified-Since would behave
26271 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26272 Esteban Manchado Velázques.
26273 - Change the BridgePassword feature (part of the "bridge community"
26274 design, which is not yet implemented) to use a time-independent
26275 comparison. The old behavior might have allowed an adversary
26276 to use timing to guess the BridgePassword value. Fixes bug 5543;
26277 bugfix on 0.2.0.14-alpha.
26278 - Detect and reject certain misformed escape sequences in
26279 configuration values. Previously, these values would cause us
26280 to crash if received in a torrc file or over an authenticated
26281 control port. Bug found by Esteban Manchado Velázquez, and
26282 independently by Robert Connolly from Matta Consulting who further
26283 noted that it allows a post-authentication heap overflow. Patch
26284 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26285 bugfix on 0.2.0.16-alpha.
26286 - Fix a compile warning when using the --enable-openbsd-malloc
26287 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26288 - During configure, detect when we're building with clang version
26289 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26290 CFLAGS. clang doesn't support them yet.
26291 - When sending an HTTP/1.1 proxy request, include a Host header.
26292 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26293 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26294 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
26295 - If we hit the error case where routerlist_insert() replaces an
26296 existing (old) server descriptor, make sure to remove that
26297 server descriptor from the old_routers list. Fix related to bug
26298 1776. Bugfix on 0.2.2.18-alpha.
26300 o Minor bugfixes (documentation and log messages):
26301 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26302 Fixes bug 4856; bugfix on Tor 0.0.6.
26303 - Update "ClientOnly" man page entry to explain that there isn't
26304 really any point to messing with it. Resolves ticket 5005.
26305 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26306 directory authority option (introduced in Tor 0.2.2.34).
26307 - Downgrade the "We're missing a certificate" message from notice
26308 to info: people kept mistaking it for a real problem, whereas it
26309 is seldom the problem even when we are failing to bootstrap. Fixes
26310 bug 5067; bugfix on 0.2.0.10-alpha.
26311 - Correctly spell "connect" in a log message on failure to create a
26312 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26313 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26314 circuits. Fixes issue 5259.
26317 - Directory authorities now reject versions of Tor older than
26318 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26319 inclusive. These versions accounted for only a small fraction of
26320 the Tor network, and have numerous known security issues. Resolves
26322 - Update to the May 1 2012 Maxmind GeoLite Country database.
26325 - When sending or relaying a RELAY_EARLY cell, we used to convert
26326 it to a RELAY cell if the connection was using the v1 link
26327 protocol. This was a workaround for older versions of Tor, which
26328 didn't handle RELAY_EARLY cells properly. Now that all supported
26329 versions can handle RELAY_EARLY cells, and now that we're enforcing
26330 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26331 remove this workaround. Addresses bug 4786.
26334 Changes in version 0.2.3.15-alpha - 2012-04-30
26335 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26336 the development branch build on Windows again.
26338 o Minor bugfixes (on 0.2.2.x and earlier):
26339 - Make sure that there are no unhandled pending TLS errors before
26340 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26341 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26342 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26343 - Fix an assert that directory authorities could trigger on sighup
26344 during some configuration state transitions. We now don't treat
26345 it as a fatal error when the new descriptor we just generated in
26346 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26347 - After we pick a directory mirror, we would refuse to use it if
26348 it's in our ExcludeExitNodes list, resulting in mysterious failures
26349 to bootstrap for people who just wanted to avoid exiting from
26350 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26351 - When building with --enable-static-tor on OpenBSD, do not
26352 erroneously attempt to link -lrt. Fixes bug 5103.
26354 o Minor bugfixes (on 0.2.3.x):
26355 - When Tor is built with kernel headers from a recent (last few
26356 years) Linux kernel, do not fail to run on older (pre-2.6.28
26357 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26358 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26359 and 0.2.3.12-alpha.
26360 - Fix compilation with miniupnpc version 1.6; patch from
26361 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26362 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26363 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26364 - Fix compilation on platforms without unistd.h, or where environ
26365 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26368 - Directory authorities are now a little more lenient at accepting
26369 older router descriptors, or newer router descriptors that don't
26370 make big changes. This should help ameliorate past and future
26371 issues where routers think they have uploaded valid descriptors,
26372 but the authorities don't think so. Fix for ticket 2479.
26373 - Make the code that clients use to detect an address change be
26374 IPv6-aware, so that it won't fill clients' logs with error
26375 messages when trying to get the IPv4 address of an IPv6
26376 connection. Implements ticket 5537.
26378 o Removed features:
26379 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26380 authorities needed to use it for a while to keep the network working
26381 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26382 that was six months ago. As of now, it should no longer be needed
26386 Changes in version 0.2.3.14-alpha - 2012-04-23
26387 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26388 candidate. It also dramatically speeds up AES: fast relays should
26389 consider switching to the newer OpenSSL library.
26391 o Directory authority changes:
26392 - Change IP address for ides (v3 directory authority), and rename
26396 - Avoid logging uninitialized data when unable to decode a hidden
26397 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26398 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26399 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26401 - If authorities are unable to get a v2 consensus document from other
26402 directory authorities, they no longer fall back to fetching
26403 them from regular directory caches. Fixes bug 5635; bugfix on
26404 0.2.2.26-beta, where routers stopped downloading v2 consensus
26405 documents entirely.
26406 - When we start a Tor client with a normal consensus already cached,
26407 be willing to download a microdescriptor consensus. Fixes bug 4011;
26408 fix on 0.2.3.1-alpha.
26410 o Major features (performance):
26411 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26412 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26413 vectorized AES implementations as appropriate. These can be much,
26414 much faster than other AES implementations.
26416 o Minor bugfixes (0.2.2.x and earlier):
26417 - Don't launch more than 10 service-side introduction-point circuits
26418 for a hidden service in five minutes. Previously, we would consider
26419 launching more introduction-point circuits if at least one second
26420 had passed without any introduction-point circuits failing. Fixes
26421 bug 4607; bugfix on 0.0.7pre1.
26422 - Change the BridgePassword feature (part of the "bridge community"
26423 design, which is not yet implemented) to use a time-independent
26424 comparison. The old behavior might have allowed an adversary
26425 to use timing to guess the BridgePassword value. Fixes bug 5543;
26426 bugfix on 0.2.0.14-alpha.
26427 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26428 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
26429 - When sending an HTTP/1.1 proxy request, include a Host header.
26430 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26431 - Don't log that we have "decided to publish new relay descriptor"
26432 unless we are actually publishing a descriptor. Fixes bug 3942;
26433 bugfix on 0.2.2.28-beta.
26435 o Minor bugfixes (0.2.3.x):
26436 - Fix a bug where a bridge authority crashes (on a failed assert)
26437 if it has seen no directory requests when it's time to write
26438 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26439 - Fix bug stomping on ORPort option NoListen and ignoring option
26440 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26441 - In the testsuite, provide a large enough buffer in the tor_sscanf
26442 unit test. Otherwise we'd overrun that buffer and crash during
26443 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
26445 - Make sure we create the keys directory if it doesn't exist and we're
26446 about to store the dynamic Diffie-Hellman parameters. Fixes bug
26447 5572; bugfix on 0.2.3.13-alpha.
26448 - Fix a small memory leak when trying to decode incorrect base16
26449 authenticator during SAFECOOKIE authentication. Found by
26450 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
26453 - Add more information to a log statement that might help track down
26454 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
26455 non-IP address" messages (or any Bug messages, for that matter!),
26456 please let us know about it.
26457 - Relays now understand an IPv6 address when they get one from a
26458 directory server. Resolves ticket 4875.
26459 - Resolve IPv6 addresses in bridge and entry statistics to country
26460 code "??" which means we at least count them. Resolves ticket 5053;
26461 improves on 0.2.3.9-alpha.
26462 - Update to the April 3 2012 Maxmind GeoLite Country database.
26463 - Begin a doc/state-contents.txt file to explain the contents of
26464 the Tor state file. Fixes bug 2987.
26466 o Default torrc changes:
26467 - Stop listing "socksport 9050" in torrc.sample. We open a socks
26468 port on 9050 by default anyway, so this should not change anything
26470 - Stop mentioning the deprecated *ListenAddress options in
26471 torrc.sample. Fixes bug 5438.
26472 - Document unit of bandwidth related options in sample torrc.
26475 o Removed features:
26476 - The "torify" script no longer supports the "tsocks" socksifier
26477 tool, since tsocks doesn't support DNS and UDP right for Tor.
26478 Everyone should be using torsocks instead. Fixes bugs 3530 and
26479 5180. Based on a patch by "ugh".
26481 o Code refactoring:
26482 - Change the symmetric cipher interface so that creating and
26483 initializing a stream cipher are no longer separate functions.
26484 - Remove all internal support for unpadded RSA. We never used it, and
26485 it would be a bad idea to start.
26488 Changes in version 0.2.3.13-alpha - 2012-03-26
26489 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
26490 in managed pluggable transports, as well as providing other cleanups
26491 that get us closer to a release candidate.
26493 o Directory authority changes:
26494 - Change IP address for maatuska (v3 directory authority).
26497 - Provide controllers with a safer way to implement the cookie
26498 authentication mechanism. With the old method, if another locally
26499 running program could convince a controller that it was the Tor
26500 process, then that program could trick the controller into telling
26501 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26502 authentication method uses a challenge-response approach to prevent
26503 this attack. Fixes bug 5185, implements proposal 193.
26504 - Never use a bridge or a controller-supplied node as an exit, even
26505 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26506 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26507 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26508 - Only build circuits if we have a sufficient threshold of the total
26509 descriptors that are marked in the consensus with the "Exit"
26510 flag. This mitigates an attack proposed by wanoskarnet, in which
26511 all of a client's bridges collude to restrict the exit nodes that
26512 the client knows about. Fixes bug 5343.
26514 o Major bugfixes (on Tor 0.2.3.x):
26515 - Avoid an assert when managed proxies like obfsproxy are configured,
26516 and we receive HUP signals or setconf attempts too rapidly. This
26517 situation happens most commonly when Vidalia tries to attach to
26518 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
26519 bugfix on 0.2.3.6-alpha.
26520 - Fix a relay-side pluggable transports bug where managed proxies were
26521 unreachable from the Internet, because Tor asked them to bind on
26522 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
26523 - Stop discarding command-line arguments when TestingTorNetwork
26524 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
26525 0.2.3.9-alpha, where task 4552 added support for two layers of
26527 - Resume allowing the unit tests to run in gdb. This was accidentally
26528 made impossible when the DisableDebuggerAttachment option was
26529 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
26530 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
26531 0.2.3.11-alpha. Reported by Anthony G. Basile.
26533 o Minor bugfixes (on 0.2.2.x and earlier):
26534 - Ensure we don't cannibalize circuits that are longer than three hops
26535 already, so we don't end up making circuits with 5 or more
26536 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
26537 0.1.0.1-rc which introduced cannibalization.
26538 - Detect and reject certain misformed escape sequences in
26539 configuration values. Previously, these values would cause us
26540 to crash if received in a torrc file or over an authenticated
26541 control port. Bug found by Esteban Manchado Velázquez, and
26542 independently by Robert Connolly from Matta Consulting who further
26543 noted that it allows a post-authentication heap overflow. Patch
26544 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26545 bugfix on 0.2.0.16-alpha.
26546 - Fix a compile warning when using the --enable-openbsd-malloc
26547 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26548 - Directory caches no longer refuse to clean out descriptors because
26549 of missing v2 networkstatus documents, unless they're configured
26550 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
26551 0.2.2.26-beta. Patch by Daniel Bryg.
26552 - Update to the latest version of the tinytest unit testing framework.
26553 This includes a couple of bugfixes that can be relevant for
26554 running forked unit tests on Windows, and removes all reserved
26557 o Minor bugfixes (on 0.2.3.x):
26558 - On a failed pipe() call, don't leak file descriptors. Fixes bug
26559 4296; bugfix on 0.2.3.1-alpha.
26560 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
26561 until after we have received a CERTS cell. Fixes bug 4361; bugfix
26562 on 0.2.3.6-alpha. Patch by "frosty".
26563 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26564 option, so that the IP stack doesn't decide to use it for IPv4
26565 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26566 - Ensure that variables set in Tor's environment cannot override
26567 environment variables that Tor passes to a managed
26568 pluggable-transport proxy. Previously, Tor would pass every
26569 variable in its environment to managed proxies along with the new
26570 ones, in such a way that on many operating systems, the inherited
26571 environment variables would override those which Tor tried to
26572 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26573 bugfix on 0.2.3.9-alpha for Windows.
26576 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26577 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26578 - Update to the March 6 2012 Maxmind GeoLite Country database.
26581 Changes in version 0.2.3.12-alpha - 2012-02-13
26582 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
26583 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
26584 when Tor is configured to use a pluggable transport like obfsproxy.
26587 - Fix builds when the path to sed, openssl, or sha1sum contains
26588 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26590 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
26591 connections. This change should allow busy exit relays to stop
26592 running out of available sockets as quickly. Fixes bug 4950;
26593 bugfix on 0.2.2.26-beta.
26594 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
26595 would ask the bridge for microdescriptors, which are only supported
26596 in 0.2.3.x, and then fail to bootstrap when it didn't get the
26597 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
26598 - Properly set up obfsproxy's environment when in managed mode. The
26599 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
26600 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
26601 5076 and 5082; bugfix on 0.2.3.6-alpha.
26604 - Use the dead_strip option when building Tor on OS X. This reduces
26605 binary size by almost 19% when linking openssl and libevent
26606 statically, which we do for Tor Browser Bundle.
26607 - Fix broken URLs in the sample torrc file, and tell readers about
26608 the OutboundBindAddress, ExitPolicyRejectPrivate, and
26609 PublishServerDescriptor options. Addresses bug 4652.
26610 - Update to the February 7 2012 Maxmind GeoLite Country database.
26613 - Downgrade the "We're missing a certificate" message from notice
26614 to info: people kept mistaking it for a real problem, whereas it
26615 is seldom the problem even when we are failing to bootstrap. Fixes
26616 bug 5067; bugfix on 0.2.0.10-alpha.
26617 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
26618 managed pluggable transport server proxy's environment.
26619 Previously, we would put it there, even though Tor doesn't
26620 implement an 'extended server port' yet, and even though Tor
26621 almost certainly isn't listening at that address. For now, we set
26622 it to an empty string to avoid crashing older obfsproxies. Bugfix
26624 - Log the heartbeat message every HeartbeatPeriod seconds, not every
26625 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
26626 0.2.3.1-alpha. Bug reported by Scott Bennett.
26627 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
26628 bugfix on 0.2.3.11-alpha.
26629 - Update "ClientOnly" man page entry to explain that there isn't
26630 really any point to messing with it. Resolves ticket 5005.
26631 - Use the correct CVE number for CVE-2011-4576 in our comments and
26632 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
26635 o Code simplifications and refactoring:
26636 - Use the _WIN32 macro throughout our code to detect Windows.
26637 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
26641 Changes in version 0.2.3.11-alpha - 2012-01-22
26642 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
26643 the last step of the plan to limit maximum circuit length, includes
26644 a wide variety of hidden service performance and correctness fixes,
26645 works around an OpenSSL security flaw if your distro is too stubborn
26646 to upgrade, and fixes a bunch of smaller issues.
26649 - Now that Tor 0.2.0.x is completely deprecated, enable the final
26650 part of "Proposal 110: Avoiding infinite length circuits" by
26651 refusing all circuit-extend requests that do not use a relay_early
26652 cell. This change helps Tor resist a class of denial-of-service
26653 attacks by limiting the maximum circuit length.
26654 - Adjust the number of introduction points that a hidden service
26655 will try to maintain based on how long its introduction points
26656 remain in use and how many introductions they handle. Fixes
26658 - Try to use system facilities for enumerating local interface
26659 addresses, before falling back to our old approach (which was
26660 binding a UDP socket, and calling getsockname() on it). That
26661 approach was scaring OS X users whose draconian firewall
26662 software warned about binding to UDP sockets, regardless of
26663 whether packets were sent. Now we try to use getifaddrs(),
26664 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
26665 system supports. Resolves ticket 1827.
26667 o Major security workaround:
26668 - When building or running with any version of OpenSSL earlier
26669 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26670 versions have a bug (CVE-2011-4576) in which their block cipher
26671 padding includes uninitialized data, potentially leaking sensitive
26672 information to any peer with whom they make a SSLv3 connection. Tor
26673 does not use SSL v3 by default, but a hostile client or server
26674 could force an SSLv3 connection in order to gain information that
26675 they shouldn't have been able to get. The best solution here is to
26676 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26677 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26678 to make sure that the bug can't happen.
26681 - Fix the SOCKET_OK test that we use to tell when socket
26682 creation fails so that it works on Win64. Fixes part of bug 4533;
26683 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26684 - Correct our replacements for the timeradd() and timersub() functions
26685 on platforms that lack them (for example, Windows). The timersub()
26686 function is used when expiring circuits, while timeradd() is
26687 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26688 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
26689 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
26690 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
26691 bug at runtime, not compile time, because some distributions hack
26692 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
26693 on 0.2.3.9-alpha. Found by Pascal.
26695 o Minor features (controller):
26696 - Use absolute path names when reporting the torrc filename in the
26697 control protocol, so a controller can more easily find the torrc
26698 file. Resolves bug 1101.
26699 - Extend the control protocol to report flags that control a circuit's
26700 path selection in CIRC events and in replies to 'GETINFO
26701 circuit-status'. Implements part of ticket 2411.
26702 - Extend the control protocol to report the hidden service address
26703 and current state of a hidden-service-related circuit in CIRC
26704 events and in replies to 'GETINFO circuit-status'. Implements part
26706 - When reporting the path to the cookie file to the controller,
26707 give an absolute path. Resolves ticket 4881.
26708 - Allow controllers to request an event notification whenever a
26709 circuit is cannibalized or its purpose is changed. Implements
26710 part of ticket 3457.
26711 - Include the creation time of a circuit in CIRC and CIRC2
26712 control-port events and the list produced by the 'GETINFO
26713 circuit-status' control-port command.
26715 o Minor features (directory authorities):
26716 - Directory authorities now reject versions of Tor older than
26717 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26718 inclusive. These versions accounted for only a small fraction of
26719 the Tor network, and have numerous known security issues. Resolves
26721 - Authority operators can now vote for all relays in a given
26722 set of countries to be BadDir/BadExit/Invalid/Rejected.
26723 - Provide two consensus parameters (FastFlagMinThreshold and
26724 FastFlagMaxThreshold) to control the range of allowable bandwidths
26725 for the Fast directory flag. These allow authorities to run
26726 experiments on appropriate requirements for being a "Fast" node.
26727 The AuthDirFastGuarantee config value still applies. Implements
26729 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26730 directory authority option (introduced in Tor 0.2.2.34).
26732 o Minor features (other):
26733 - Don't disable the DirPort when we cannot exceed our AccountingMax
26734 limit during this interval because the effective bandwidthrate is
26735 low enough. This is useful in a situation where AccountMax is only
26736 used as an additional safeguard or to provide statistics.
26737 - Prepend an informative header to generated dynamic_dh_params files.
26738 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
26739 EntryNodes will have no effect. Resolves issue 2571.
26740 - Log more useful messages when we fail to disable debugger
26742 - Log which authority we're missing votes from when we go to fetch
26743 them from the other auths.
26744 - Log (at debug level) whenever a circuit's purpose is changed.
26745 - Add missing documentation for the MaxClientCircuitsPending,
26746 UseMicrodescriptors, UserspaceIOCPBuffers, and
26747 _UseFilteringSSLBufferevents options, all introduced during
26748 the 0.2.3.x series.
26749 - Update to the January 3 2012 Maxmind GeoLite Country database.
26751 o Minor bugfixes (hidden services):
26752 - Don't close hidden service client circuits which have almost
26753 finished connecting to their destination when they reach
26754 the normal circuit-build timeout. Previously, we would close
26755 introduction circuits which are waiting for an acknowledgement
26756 from the introduction point, and rendezvous circuits which have
26757 been specified in an INTRODUCE1 cell sent to a hidden service,
26758 after the normal CBT. Now, we mark them as 'timed out', and launch
26759 another rendezvous attempt in parallel. This behavior change can
26760 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
26761 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
26762 - Don't close hidden-service-side rendezvous circuits when they
26763 reach the normal circuit-build timeout. This behavior change can
26764 be disabled using the new
26765 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
26766 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
26767 - Make sure we never mark the wrong rendezvous circuit as having
26768 had its introduction cell acknowledged by the introduction-point
26769 relay. Previously, when we received an INTRODUCE_ACK cell on a
26770 client-side hidden-service introduction circuit, we might have
26771 marked a rendezvous circuit other than the one we specified in
26772 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
26773 a warning message and interfered with the hidden service
26774 connection-establishment process. Fixes bug 4759; bugfix on
26775 0.2.3.3-alpha, when we added the stream-isolation feature which
26776 might cause Tor to open multiple rendezvous circuits for the same
26778 - Don't trigger an assertion failure when we mark a new client-side
26779 hidden-service introduction circuit for close during the process
26780 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
26783 o Minor bugfixes (log messages):
26784 - Correctly spell "connect" in a log message on failure to create a
26785 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
26787 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26788 Fixes bug 4856; bugfix on Tor 0.0.6.
26789 - Fix the log message describing how we work around discovering
26790 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
26791 4837; bugfix on 0.2.2.9-alpha.
26792 - When logging about a disallowed .exit name, do not also call it
26793 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
26795 o Minor bugfixes (build fixes):
26796 - During configure, detect when we're building with clang version
26797 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26798 CFLAGS. clang doesn't support them yet.
26799 - During configure, search for library containing cos function as
26800 libm lives in libcore on some platforms (BeOS/Haiku). Linking
26801 against libm was hard-coded before. Fixes the first part of bug
26802 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
26804 - Detect attempts to build Tor on (as yet hypothetical) versions
26805 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
26806 fix for bug 4533. Bugfix on 0.2.2.28-beta.
26807 - Preprocessor directives should not be put inside the arguments
26808 of a macro. This would break compilation with GCC releases prior
26809 to version 3.3. We would never recommend such an old GCC version,
26810 but it is apparently required for binary compatibility on some
26811 platforms (namely, certain builds of Haiku). Fixes the other part
26812 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
26815 o Minor bugfixes (other):
26816 - Older Linux kernels erroneously respond to strange nmap behavior
26817 by having accept() return successfully with a zero-length
26818 socket. When this happens, just close the connection. Previously,
26819 we would try harder to learn the remote address: but there was
26820 no such remote address to learn, and our method for trying to
26821 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26822 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26823 - Fix null-pointer access that could occur if TLS allocation failed.
26824 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
26825 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
26826 accidentally been reverted.
26827 - Fix our implementation of crypto_random_hostname() so it can't
26828 overflow on ridiculously large inputs. (No Tor version has ever
26829 provided this kind of bad inputs, but let's be correct in depth.)
26830 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
26831 - Find more places in the code that should have been testing for
26832 invalid sockets using the SOCKET_OK macro. Required for a fix
26833 for bug 4533. Bugfix on 0.2.2.28-beta.
26834 - Fix an assertion failure when, while running with bufferevents, a
26835 connection finishes connecting after it is marked for close, but
26836 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
26837 - test_util_spawn_background_ok() hardcoded the expected value
26838 for ENOENT to 2. This isn't portable as error numbers are
26839 platform specific, and particularly the hurd has ENOENT at
26840 0x40000002. Construct expected string at runtime, using the correct
26841 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
26842 - Reject attempts to disable DisableDebuggerAttachment while Tor is
26843 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
26844 - Use an appropriate-width type for sockets in tor-fw-helper on
26845 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
26848 - When sending or relaying a RELAY_EARLY cell, we used to convert
26849 it to a RELAY cell if the connection was using the v1 link
26850 protocol. This was a workaround for older versions of Tor, which
26851 didn't handle RELAY_EARLY cells properly. Now that all supported
26852 versions can handle RELAY_EARLY cells, and now that we're enforcing
26853 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26854 remove this workaround. Addresses bug 4786.
26856 o Code simplifications and refactoring:
26857 - Use OpenSSL's built-in SSL_state_string_long() instead of our
26858 own homebrewed ssl_state_to_string() replacement. Patch from
26859 Emile Snyder. Fixes bug 4653.
26860 - Use macros to indicate OpenSSL versions, so we don't need to worry
26861 about accidental hexadecimal bit shifts.
26862 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
26864 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
26865 - Use the smartlist_add_asprintf() alias more consistently.
26866 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
26867 invalid value, rather than just -1.
26868 - Rename a handful of old identifiers, mostly related to crypto
26869 structures and crypto functions. By convention, our "create an
26870 object" functions are called "type_new()", our "free an object"
26871 functions are called "type_free()", and our types indicate that
26872 they are types only with a final "_t". But a handful of older
26873 types and functions broke these rules, with function names like
26874 "type_create" or "subsystem_op_type", or with type names like
26878 Changes in version 0.2.3.10-alpha - 2011-12-16
26879 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
26880 Tor's buffers code. Absolutely everybody should upgrade.
26882 The bug relied on an incorrect calculation when making data continuous
26883 in one of our IO buffers, if the first chunk of the buffer was
26884 misaligned by just the wrong amount. The miscalculation would allow an
26885 attacker to overflow a piece of heap-allocated memory. To mount this
26886 attack, the attacker would need to either open a SOCKS connection to
26887 Tor's SocksPort (usually restricted to localhost), or target a Tor
26888 instance configured to make its connections through a SOCKS proxy
26889 (which Tor does not do by default).
26891 Good security practice requires that all heap-overflow bugs should be
26892 presumed to be exploitable until proven otherwise, so we are treating
26893 this as a potential code execution attack. Please upgrade immediately!
26894 This bug does not affect bufferevents-based builds of Tor. Special
26895 thanks to "Vektor" for reporting this issue to us!
26897 This release also contains a few minor bugfixes for issues discovered
26901 - Fix a heap overflow bug that could occur when trying to pull
26902 data into the first chunk of a buffer, when that chunk had
26903 already had some data drained from it. Fixes CVE-2011-2778;
26904 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26907 - If we can't attach streams to a rendezvous circuit when we
26908 finish connecting to a hidden service, clear the rendezvous
26909 circuit's stream-isolation state and try to attach streams
26910 again. Previously, we cleared rendezvous circuits' isolation
26911 state either too early (if they were freshly built) or not at all
26912 (if they had been built earlier and were cannibalized). Bugfix on
26913 0.2.3.3-alpha; fixes bug 4655.
26914 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
26915 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
26916 - Fix an assertion failure when a relay with accounting enabled
26917 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
26920 - Update to the December 6 2011 Maxmind GeoLite Country database.
26923 Changes in version 0.2.2.35 - 2011-12-16
26924 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
26925 buffers code. Absolutely everybody should upgrade.
26927 The bug relied on an incorrect calculation when making data continuous
26928 in one of our IO buffers, if the first chunk of the buffer was
26929 misaligned by just the wrong amount. The miscalculation would allow an
26930 attacker to overflow a piece of heap-allocated memory. To mount this
26931 attack, the attacker would need to either open a SOCKS connection to
26932 Tor's SocksPort (usually restricted to localhost), or target a Tor
26933 instance configured to make its connections through a SOCKS proxy
26934 (which Tor does not do by default).
26936 Good security practice requires that all heap-overflow bugs should be
26937 presumed to be exploitable until proven otherwise, so we are treating
26938 this as a potential code execution attack. Please upgrade immediately!
26939 This bug does not affect bufferevents-based builds of Tor. Special
26940 thanks to "Vektor" for reporting this issue to us!
26942 Tor 0.2.2.35 also fixes several bugs in previous versions, including
26943 crash bugs for unusual configurations, and a long-term bug that
26944 would prevent Tor from starting on Windows machines with draconian
26947 With this release, we remind everyone that 0.2.0.x has reached its
26948 formal end-of-life. Those Tor versions have many known flaws, and
26949 nobody should be using them. You should upgrade -- ideally to the
26950 0.2.2.x series. If you're using a Linux or BSD and its packages are
26951 obsolete, stop using those packages and upgrade anyway.
26953 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
26954 longer receive support after some time in early 2012.
26957 - Fix a heap overflow bug that could occur when trying to pull
26958 data into the first chunk of a buffer, when that chunk had
26959 already had some data drained from it. Fixes CVE-2011-2778;
26960 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26961 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
26962 that it doesn't attempt to allocate a socketpair. This could cause
26963 some problems on Windows systems with overzealous firewalls. Fix for
26964 bug 4457; workaround for Libevent versions 2.0.1-alpha through
26966 - If we mark an OR connection for close based on a cell we process,
26967 don't process any further cells on it. We already avoid further
26968 reads on marked-for-close connections, but now we also discard the
26969 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
26970 which was the first version where we might mark a connection for
26971 close based on processing a cell on it.
26972 - Correctly sanity-check that we don't underflow on a memory
26973 allocation (and then assert) for hidden service introduction
26974 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26975 bugfix on 0.2.1.5-alpha.
26976 - Fix a memory leak when we check whether a hidden service
26977 descriptor has any usable introduction points left. Fixes bug
26978 4424. Bugfix on 0.2.2.25-alpha.
26979 - Don't crash when we're running as a relay and don't have a GeoIP
26980 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
26981 we've had in the 0.2.3.x branch already.
26982 - When running as a client, do not print a misleading (and plain
26983 wrong) log message that we're collecting "directory request"
26984 statistics: clients don't collect statistics. Also don't create a
26985 useless (because empty) stats file in the stats/ directory. Fixes
26986 bug 4353; bugfix on 0.2.2.34.
26989 - Detect failure to initialize Libevent. This fix provides better
26990 detection for future instances of bug 4457.
26991 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26992 function. This was eating up hideously large amounts of time on some
26993 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26994 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26995 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26997 - Don't warn about unused log_mutex in log.c when building with
26998 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26999 0.1.0.6-rc which introduced --disable-threads.
27000 - When configuring, starting, or stopping an NT service, stop
27001 immediately after the service configuration attempt has succeeded
27002 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27003 - When sending a NETINFO cell, include the original address
27004 received for the other side, not its canonical address. Found
27005 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27006 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
27007 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27008 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27009 occurred when a client tried to fetch a descriptor for a bridge
27010 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27011 - Backport fixes for a pair of compilation warnings on Windows.
27012 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
27013 - If we had ever tried to call tor_addr_to_str on an address of
27014 unknown type, we would have done a strdup on an uninitialized
27015 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27016 Reported by "troll_un".
27017 - Correctly detect and handle transient lookup failures from
27018 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27019 Reported by "troll_un".
27020 - Fix null-pointer access that could occur if TLS allocation failed.
27021 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27022 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27023 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27026 - Add two new config options for directory authorities:
27027 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27028 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27029 that is always sufficient to satisfy the bandwidth requirement for
27030 the Guard flag. Now it will be easier for researchers to simulate
27031 Tor networks with different values. Resolves ticket 4484.
27032 - When Tor ignores a hidden service specified in its configuration,
27033 include the hidden service's directory in the warning message.
27034 Previously, we would only tell the user that some hidden service
27035 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27036 - Update to the December 6 2011 Maxmind GeoLite Country database.
27038 o Packaging changes:
27039 - Make it easier to automate expert package builds on Windows,
27040 by removing an absolute path from makensis.exe command.
27043 Changes in version 0.2.1.32 - 2011-12-16
27044 Tor 0.2.1.32 backports important security and privacy fixes for
27045 oldstable. This release is intended only for package maintainers and
27046 others who cannot use the 0.2.2 stable series. All others should be
27047 using Tor 0.2.2.x or newer.
27049 The Tor 0.2.1.x series will reach formal end-of-life some time in
27050 early 2012; we will stop releasing patches for it then.
27052 o Major bugfixes (also included in 0.2.2.x):
27053 - Correctly sanity-check that we don't underflow on a memory
27054 allocation (and then assert) for hidden service introduction
27055 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27056 bugfix on 0.2.1.5-alpha.
27057 - Fix a heap overflow bug that could occur when trying to pull
27058 data into the first chunk of a buffer, when that chunk had
27059 already had some data drained from it. Fixes CVE-2011-2778;
27060 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
27063 - Update to the December 6 2011 Maxmind GeoLite Country database.
27066 Changes in version 0.2.3.9-alpha - 2011-12-08
27067 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
27068 a "DisableNetwork" security feature that bundles can use to avoid
27069 touching the network until bridges are configured, moves forward on
27070 the pluggable transport design, fixes a flaw in the hidden service
27071 design that unnecessarily prevented clients with wrong clocks from
27072 reaching hidden services, and fixes a wide variety of other issues.
27075 - Clients can now connect to private bridges over IPv6. Bridges
27076 still need at least one IPv4 address in order to connect to
27077 other relays. Note that we don't yet handle the case where the
27078 user has two bridge lines for the same bridge (one IPv4, one
27079 IPv6). Implements parts of proposal 186.
27080 - New "DisableNetwork" config option to prevent Tor from launching any
27081 connections or accepting any connections except on a control port.
27082 Bundles and controllers can set this option before letting Tor talk
27083 to the rest of the network, for example to prevent any connections
27084 to a non-bridge address. Packages like Orbot can also use this
27085 option to instruct Tor to save power when the network is off.
27086 - Clients and bridges can now be configured to use a separate
27087 "transport" proxy. This approach makes the censorship arms race
27088 easier by allowing bridges to use protocol obfuscation plugins. It
27089 implements the "managed proxy" part of proposal 180 (ticket 3472).
27090 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
27091 implementation. It makes AES_CTR about 7% faster than our old one
27092 (which was about 10% faster than the one OpenSSL used to provide).
27093 Resolves ticket 4526.
27094 - Add a "tor2web mode" for clients that want to connect to hidden
27095 services non-anonymously (and possibly more quickly). As a safety
27096 measure to try to keep users from turning this on without knowing
27097 what they are doing, tor2web mode must be explicitly enabled at
27098 compile time, and a copy of Tor compiled to run in tor2web mode
27099 cannot be used as a normal Tor client. Implements feature 2553.
27100 - Add experimental support for running on Windows with IOCP and no
27101 kernel-space socket buffers. This feature is controlled by a new
27102 "UserspaceIOCPBuffers" config option (off by default), which has
27103 no effect unless Tor has been built with support for bufferevents,
27104 is running on Windows, and has enabled IOCP. This may, in the long
27105 run, help solve or mitigate bug 98.
27106 - Use a more secure consensus parameter voting algorithm. Now at
27107 least three directory authorities or a majority of them must
27108 vote on a given parameter before it will be included in the
27109 consensus. Implements proposal 178.
27112 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
27113 They used to check that the timestamp was within 30 minutes
27114 of their system clock, so they could cap the size of their
27115 replay-detection cache, but that approach unnecessarily refused
27116 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
27117 the v3 intro-point protocol (the first one which sent a timestamp
27118 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
27119 - Only use the EVP interface when AES acceleration is enabled,
27120 to avoid a 5-7% performance regression. Resolves issue 4525;
27121 bugfix on 0.2.3.8-alpha.
27123 o Privacy/anonymity features (bridge detection):
27124 - Make bridge SSL certificates a bit more stealthy by using random
27125 serial numbers, in the same fashion as OpenSSL when generating
27126 self-signed certificates. Implements ticket 4584.
27127 - Introduce a new config option "DynamicDHGroups", enabled by
27128 default, which provides each bridge with a unique prime DH modulus
27129 to be used during SSL handshakes. This option attempts to help
27130 against censors who might use the Apache DH modulus as a static
27131 identifier for bridges. Addresses ticket 4548.
27133 o Minor features (new/different config options):
27134 - New configuration option "DisableDebuggerAttachment" (on by default)
27135 to prevent basic debugging attachment attempts by other processes.
27136 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
27137 - Allow MapAddress directives to specify matches against super-domains,
27138 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
27139 Implements issue 933.
27140 - Slightly change behavior of "list" options (that is, config
27141 options that can appear more than once) when they appear both in
27142 torrc and on the command line. Previously, the command-line options
27143 would be appended to the ones from torrc. Now, the command-line
27144 options override the torrc options entirely. This new behavior
27145 allows the user to override list options (like exit policies and
27146 ports to listen on) from the command line, rather than simply
27147 appending to the list.
27148 - You can get the old (appending) command-line behavior for "list"
27149 options by prefixing the option name with a "+".
27150 - You can remove all the values for a "list" option from the command
27151 line without adding any new ones by prefixing the option name
27153 - Add experimental support for a "defaults" torrc file to be parsed
27154 before the regular torrc. Torrc options override the defaults file's
27155 options in the same way that the command line overrides the torrc.
27156 The SAVECONF controller command saves only those options which
27157 differ between the current configuration and the defaults file. HUP
27158 reloads both files. (Note: This is an experimental feature; its
27159 behavior will probably be refined in future 0.2.3.x-alpha versions
27160 to better meet packagers' needs.) Implements task 4552.
27163 - Try to make the introductory warning message that Tor prints on
27164 startup more useful for actually finding help and information.
27165 Resolves ticket 2474.
27166 - Running "make version" now displays the version of Tor that
27167 we're about to build. Idea from katmagic; resolves issue 4400.
27168 - Expire old or over-used hidden service introduction points.
27169 Required by fix for bug 3460.
27170 - Move the replay-detection cache for the RSA-encrypted parts of
27171 INTRODUCE2 cells to the introduction point data structures.
27172 Previously, we would use one replay-detection cache per hidden
27173 service. Required by fix for bug 3460.
27174 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
27175 public key replay-detection cache from 60 minutes to 5 minutes. This
27176 replay-detection cache is now used only to detect multiple
27177 INTRODUCE2 cells specifying the same rendezvous point, so we can
27178 avoid launching multiple simultaneous attempts to connect to it.
27180 o Minor bugfixes (on Tor 0.2.2.x and earlier):
27181 - Resolve an integer overflow bug in smartlist_ensure_capacity().
27182 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
27184 - Fix a minor formatting issue in one of tor-gencert's error messages.
27186 - Prevent a false positive from the check-spaces script, by disabling
27187 the "whitespace between function name and (" check for functions
27189 - Fix a log message suggesting that people contact a non-existent
27190 email address. Fixes bug 3448.
27191 - Fix null-pointer access that could occur if TLS allocation failed.
27192 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
27193 - Report a real bootstrap problem to the controller on router
27194 identity mismatch. Previously we just said "foo", which probably
27195 made a lot of sense at the time. Fixes bug 4169; bugfix on
27197 - If we had ever tried to call tor_addr_to_str() on an address of
27198 unknown type, we would have done a strdup() on an uninitialized
27199 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
27200 Reported by "troll_un".
27201 - Correctly detect and handle transient lookup failures from
27202 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
27203 Reported by "troll_un".
27204 - Use tor_socket_t type for listener argument to accept(). Fixes bug
27205 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
27206 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
27207 bug 4532; found by "troll_un".
27209 o Minor bugfixes (on Tor 0.2.3.x):
27210 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
27212 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
27213 circuit for use as a hidden service client's rendezvous point.
27214 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
27215 with help from wanoskarnet.
27216 - Restore behavior of overriding SocksPort, ORPort, and similar
27217 options from the command line. Bugfix on 0.2.3.3-alpha.
27220 - Properly handle the case where the build-tree is not the same
27221 as the source tree when generating src/common/common_sha1.i,
27222 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
27223 bugfix on 0.2.0.1-alpha.
27225 o Code simplifications, cleanups, and refactorings:
27226 - Remove the pure attribute from all functions that used it
27227 previously. In many cases we assigned it incorrectly, because the
27228 functions might assert or call impure functions, and we don't have
27229 evidence that keeping the pure attribute is worthwhile. Implements
27230 changes suggested in ticket 4421.
27231 - Remove some dead code spotted by coverity. Fixes cid 432.
27232 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27235 Changes in version 0.2.3.8-alpha - 2011-11-22
27236 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27237 socketpair-related bug that has been bothering Windows users. It adds
27238 support to serve microdescriptors to controllers, so Vidalia's network
27239 map can resume listing relays (once Vidalia implements its side),
27240 and adds better support for hardware AES acceleration. Finally, it
27241 starts the process of adjusting the bandwidth cutoff for getting the
27242 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27243 that tiny relays harm performance more than they help network capacity.
27246 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27247 that it doesn't attempt to allocate a socketpair. This could cause
27248 some problems on Windows systems with overzealous firewalls. Fix for
27249 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27251 - Correctly sanity-check that we don't underflow on a memory
27252 allocation (and then assert) for hidden service introduction
27253 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27254 bugfix on 0.2.1.5-alpha.
27255 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27256 flag. In the past few years the average relay speed has picked
27257 up, and while the "top 7/8 of the network get the Fast flag" and
27258 "all relays with 20KB or more of capacity get the Fast flag" rules
27259 used to have the same result, now the top 7/8 of the network has
27260 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27261 - Fix a rare assertion failure when checking whether a v0 hidden
27262 service descriptor has any usable introduction points left, and
27263 we don't have enough information to build a circuit to the first
27264 intro point named in the descriptor. The HS client code in
27265 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27266 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27267 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27268 - Make bridge authorities not crash when they are asked for their own
27269 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27270 - When running as a client, do not print a misleading (and plain
27271 wrong) log message that we're collecting "directory request"
27272 statistics: clients don't collect statistics. Also don't create a
27273 useless (because empty) stats file in the stats/ directory. Fixes
27274 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27277 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27278 for a relay by identity digest or nickname. Previously,
27279 microdescriptors were only available by their own digests, so a
27280 controller would have to ask for and parse the whole microdescriptor
27281 consensus in order to look up a single relay's microdesc. Fixes
27282 bug 3832; bugfix on 0.2.3.1-alpha.
27283 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27284 operations can use hardware acceleration (if present). Resolves
27287 o Minor bugfixes (on 0.2.2.x and earlier):
27288 - Detect failure to initialize Libevent. This fix provides better
27289 detection for future instances of bug 4457.
27290 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27291 function. This was eating up hideously large amounts of time on some
27292 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27293 - Don't warn about unused log_mutex in log.c when building with
27294 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27295 0.1.0.6-rc which introduced --disable-threads.
27296 - Allow manual 'authenticate' commands to the controller interface
27297 from netcat (nc) as well as telnet. We were rejecting them because
27298 they didn't come with the expected whitespace at the end of the
27299 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27300 - Fix some (not actually triggerable) buffer size checks in usage of
27301 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27303 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27304 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27305 - When configuring, starting, or stopping an NT service, stop
27306 immediately after the service configuration attempt has succeeded
27307 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27308 - When sending a NETINFO cell, include the original address
27309 received for the other side, not its canonical address. Found
27310 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27311 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27312 can pick them up when the tests aren't disabled. Bugfix on
27313 0.2.2.4-alpha which introduced tinytest.
27314 - Fix a memory leak when we check whether a hidden service
27315 descriptor has any usable introduction points left. Fixes bug
27316 4424. Bugfix on 0.2.2.25-alpha.
27317 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27318 occurred when a client tried to fetch a descriptor for a bridge
27319 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27321 o Minor bugfixes (on 0.2.3.x):
27322 - Make util unit tests build correctly with MSVC. Bugfix on
27323 0.2.3.3-alpha. Patch by Gisle Vanem.
27324 - Successfully detect AUTH_CHALLENGE cells with no recognized
27325 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27326 Found by frosty_un.
27327 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27328 it should still send a NETINFO cell to allow the connection to
27329 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27331 - Log less loudly when we get an invalid authentication certificate
27332 from a source other than a directory authority: it's not unusual
27333 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27335 - Tolerate servers with more clock skew in their authentication
27336 certificates than previously. Fixes bug 4371; bugfix on
27338 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27339 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27342 - Add two new config options for directory authorities:
27343 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27344 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27345 that is always sufficient to satisfy the bandwidth requirement for
27346 the Guard flag. Now it will be easier for researchers to simulate
27347 Tor networks with different values. Resolves ticket 4484.
27348 - When Tor ignores a hidden service specified in its configuration,
27349 include the hidden service's directory in the warning message.
27350 Previously, we would only tell the user that some hidden service
27351 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27352 - When we fail to initialize Libevent, retry with IOCP disabled so we
27353 don't need to turn on multi-threading support in Libevent, which in
27354 turn requires a working socketpair(). This is a workaround for bug
27355 4457, which affects Libevent versions from 2.0.1-alpha through
27357 - Detect when we try to build on a platform that doesn't define
27358 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27359 - Update to the November 1 2011 Maxmind GeoLite Country database.
27361 o Packaging changes:
27362 - Make it easier to automate expert package builds on Windows,
27363 by removing an absolute path from makensis.exe command.
27365 o Code simplifications and refactoring:
27366 - Remove some redundant #include directives throughout the code.
27367 Patch from Andrea Gelmini.
27368 - Unconditionally use OpenSSL's AES implementation instead of our
27369 old built-in one. OpenSSL's AES has been better for a while, and
27370 relatively few servers should still be on any version of OpenSSL
27371 that doesn't have good optimized assembly AES.
27372 - Use the name "CERTS" consistently to refer to the new cell type;
27373 we were calling it CERT in some places and CERTS in others.
27376 - Numerous new unit tests for functions in util.c and address.c by
27378 - The long-disabled benchmark tests are now split into their own
27379 ./src/test/bench binary.
27380 - The benchmark tests can now use more accurate timers than
27381 gettimeofday() when such timers are available.
27384 Changes in version 0.2.3.7-alpha - 2011-10-30
27385 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27386 the new v3 handshake. It also resolves yet another bridge address
27390 - If we mark an OR connection for close based on a cell we process,
27391 don't process any further cells on it. We already avoid further
27392 reads on marked-for-close connections, but now we also discard the
27393 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27394 which was the first version where we might mark a connection for
27395 close based on processing a cell on it.
27396 - Fix a double-free bug that would occur when we received an invalid
27397 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27398 bugfix on 0.2.3.6-alpha.
27399 - Bridges no longer include their address in NETINFO cells on outgoing
27400 OR connections, to allow them to blend in better with clients.
27401 Removes another avenue for enumerating bridges. Reported by
27402 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27403 cells were introduced.
27406 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27407 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27410 Changes in version 0.2.3.6-alpha - 2011-10-26
27411 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27412 anonymity vulnerability where an attacker can deanonymize Tor
27413 users. Everybody should upgrade.
27415 This release also features support for a new v3 connection handshake
27416 protocol, and fixes to make hidden service connections more robust.
27419 - Implement a new handshake protocol (v3) for authenticating Tors to
27420 each other over TLS. It should be more resistant to fingerprinting
27421 than previous protocols, and should require less TLS hacking for
27422 future Tor implementations. Implements proposal 176.
27423 - Allow variable-length padding cells to disguise the length of
27424 Tor's TLS records. Implements part of proposal 184.
27426 o Privacy/anonymity fixes (clients):
27427 - Clients and bridges no longer send TLS certificate chains on
27428 outgoing OR connections. Previously, each client or bridge would
27429 use the same cert chain for all outgoing OR connections until
27430 its IP address changes, which allowed any relay that the client
27431 or bridge contacted to determine which entry guards it is using.
27432 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27433 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27434 no longer considers that connection as suitable for satisfying a
27435 circuit EXTEND request. Now relays can protect clients from the
27436 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27437 - Directory authorities no longer assign the Guard flag to relays
27438 that haven't upgraded to the above "refuse EXTEND requests
27439 to client connections" fix. Now directory authorities can
27440 protect clients from the CVE-2011-2768 issue even if neither
27441 the clients nor the relays have upgraded yet. There's a new
27442 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27443 to let us transition smoothly, else tomorrow there would be no
27446 o Major bugfixes (hidden services):
27447 - Improve hidden service robustness: when an attempt to connect to
27448 a hidden service ends, be willing to refetch its hidden service
27449 descriptors from each of the HSDir relays responsible for them
27450 immediately. Previously, we would not consider refetching the
27451 service's descriptors from each HSDir for 15 minutes after the last
27452 fetch, which was inconvenient if the hidden service was not running
27453 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
27454 - When one of a hidden service's introduction points appears to be
27455 unreachable, stop trying it. Previously, we would keep trying
27456 to build circuits to the introduction point until we lost the
27457 descriptor, usually because the user gave up and restarted Tor.
27458 Partly fixes bug 3825.
27459 - Don't launch a useless circuit after failing to use one of a
27460 hidden service's introduction points. Previously, we would
27461 launch a new introduction circuit, but not set the hidden service
27462 which that circuit was intended to connect to, so it would never
27463 actually be used. A different piece of code would then create a
27464 new introduction circuit correctly. Bug reported by katmagic and
27465 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27467 o Major bugfixes (other):
27468 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27469 that they initiated. Relays could distinguish incoming bridge
27470 connections from client connections, creating another avenue for
27471 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27472 Found by "frosty_un".
27473 - Don't update the AccountingSoftLimitHitAt state file entry whenever
27474 tor gets started. This prevents a wrong average bandwidth
27475 estimate, which would cause relays to always start a new accounting
27476 interval at the earliest possible moment. Fixes bug 2003; bugfix
27477 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
27478 immensely in tracking this bug down.
27479 - Fix a crash bug when changing node restrictions while a DNS lookup
27480 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27483 o Minor bugfixes (on 0.2.2.x and earlier):
27484 - When a hidden service turns an extra service-side introduction
27485 circuit into a general-purpose circuit, free the rend_data and
27486 intro_key fields first, so we won't leak memory if the circuit
27487 is cannibalized for use as another service-side introduction
27488 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27489 - Rephrase the log message emitted if the TestSocks check is
27490 successful. Patch from Fabian Keil; fixes bug 4094.
27491 - Bridges now skip DNS self-tests, to act a little more stealthily.
27492 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27493 bridges. Patch by "warms0x".
27494 - Remove a confusing dollar sign from the example fingerprint in the
27495 man page, and also make the example fingerprint a valid one. Fixes
27496 bug 4309; bugfix on 0.2.1.3-alpha.
27497 - Fix internal bug-checking logic that was supposed to catch
27498 failures in digest generation so that it will fail more robustly
27499 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27500 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27501 - Report any failure in init_keys() calls launched because our
27502 IP address has changed. Spotted by Coverity Scan. Bugfix on
27503 0.1.1.4-alpha; fixes CID 484.
27505 o Minor bugfixes (on 0.2.3.x):
27506 - Fix a bug in configure.in that kept it from building a configure
27507 script with autoconf versions earlier than 2.61. Fixes bug 2430;
27508 bugfix on 0.2.3.1-alpha.
27509 - Don't warn users that they are exposing a client port to the
27510 Internet if they have specified an RFC1918 address. Previously,
27511 we would warn if the user had specified any non-loopback
27512 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
27513 - Fix memory leaks in the failing cases of the new SocksPort and
27514 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
27515 fixes coverity CIDs 485, 486, and 487.
27518 - When a hidden service's introduction point times out, consider
27519 trying it again during the next attempt to connect to the
27520 HS. Previously, we would not try it again unless a newly fetched
27521 descriptor contained it. Required by fixes for bugs 1297 and 3825.
27522 - The next version of Windows will be called Windows 8, and it has
27523 a major version of 6, minor version of 2. Correctly identify that
27524 version instead of calling it "Very recent version". Resolves
27525 ticket 4153; reported by funkstar.
27526 - The Bridge Authority now writes statistics on how many bridge
27527 descriptors it gave out in total, and how many unique descriptors
27528 it gave out. It also lists how often the most and least commonly
27529 fetched descriptors were given out, as well as the median and
27530 25th/75th percentile. Implements tickets 4200 and 4294.
27531 - Update to the October 4 2011 Maxmind GeoLite Country database.
27533 o Code simplifications and refactoring:
27534 - Remove some old code to remember statistics about which descriptors
27535 we've served as a directory mirror. The feature wasn't used and
27536 is outdated now that microdescriptors are around.
27537 - Rename Tor functions that turn strings into addresses, so that
27538 "parse" indicates that no hostname resolution occurs, and
27539 "lookup" indicates that hostname resolution may occur. This
27540 should help prevent mistakes in the future. Fixes bug 3512.
27543 Changes in version 0.2.2.34 - 2011-10-26
27544 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
27545 can deanonymize Tor users. Everybody should upgrade.
27547 The attack relies on four components: 1) Clients reuse their TLS cert
27548 when talking to different relays, so relays can recognize a user by
27549 the identity key in her cert. 2) An attacker who knows the client's
27550 identity key can probe each guard relay to see if that identity key
27551 is connected to that guard relay right now. 3) A variety of active
27552 attacks in the literature (starting from "Low-Cost Traffic Analysis
27553 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
27554 discover the guard relays that a Tor user visiting the website is using.
27555 4) Clients typically pick three guards at random, so the set of guards
27556 for a given user could well be a unique fingerprint for her. This
27557 release fixes components #1 and #2, which is enough to block the attack;
27558 the other two remain as open research problems. Special thanks to
27559 "frosty_un" for reporting the issue to us!
27561 Clients should upgrade so they are no longer recognizable by the TLS
27562 certs they present. Relays should upgrade so they no longer allow a
27563 remote attacker to probe them to test whether unpatched clients are
27564 currently connected to them.
27566 This release also fixes several vulnerabilities that allow an attacker
27567 to enumerate bridge relays. Some bridge enumeration attacks still
27568 remain; see for example proposal 188.
27570 o Privacy/anonymity fixes (clients):
27571 - Clients and bridges no longer send TLS certificate chains on
27572 outgoing OR connections. Previously, each client or bridge would
27573 use the same cert chain for all outgoing OR connections until
27574 its IP address changes, which allowed any relay that the client
27575 or bridge contacted to determine which entry guards it is using.
27576 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27577 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27578 no longer considers that connection as suitable for satisfying a
27579 circuit EXTEND request. Now relays can protect clients from the
27580 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27581 - Directory authorities no longer assign the Guard flag to relays
27582 that haven't upgraded to the above "refuse EXTEND requests
27583 to client connections" fix. Now directory authorities can
27584 protect clients from the CVE-2011-2768 issue even if neither
27585 the clients nor the relays have upgraded yet. There's a new
27586 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27587 to let us transition smoothly, else tomorrow there would be no
27590 o Privacy/anonymity fixes (bridge enumeration):
27591 - Bridge relays now do their directory fetches inside Tor TLS
27592 connections, like all the other clients do, rather than connecting
27593 directly to the DirPort like public relays do. Removes another
27594 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27595 - Bridges relays now build circuits for themselves in a more similar
27596 way to how clients build them. Removes another avenue for
27597 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27598 when bridges were introduced.
27599 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27600 that they initiated. Relays could distinguish incoming bridge
27601 connections from client connections, creating another avenue for
27602 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27603 Found by "frosty_un".
27606 - Fix a crash bug when changing node restrictions while a DNS lookup
27607 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27609 - Don't launch a useless circuit after failing to use one of a
27610 hidden service's introduction points. Previously, we would
27611 launch a new introduction circuit, but not set the hidden service
27612 which that circuit was intended to connect to, so it would never
27613 actually be used. A different piece of code would then create a
27614 new introduction circuit correctly. Bug reported by katmagic and
27615 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27618 - Change an integer overflow check in the OpenBSD_Malloc code so
27619 that GCC is less likely to eliminate it as impossible. Patch
27620 from Mansour Moufid. Fixes bug 4059.
27621 - When a hidden service turns an extra service-side introduction
27622 circuit into a general-purpose circuit, free the rend_data and
27623 intro_key fields first, so we won't leak memory if the circuit
27624 is cannibalized for use as another service-side introduction
27625 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27626 - Bridges now skip DNS self-tests, to act a little more stealthily.
27627 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27628 bridges. Patch by "warms0x".
27629 - Fix internal bug-checking logic that was supposed to catch
27630 failures in digest generation so that it will fail more robustly
27631 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27632 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27633 - Report any failure in init_keys() calls launched because our
27634 IP address has changed. Spotted by Coverity Scan. Bugfix on
27635 0.1.1.4-alpha; fixes CID 484.
27637 o Minor bugfixes (log messages and documentation):
27638 - Remove a confusing dollar sign from the example fingerprint in the
27639 man page, and also make the example fingerprint a valid one. Fixes
27640 bug 4309; bugfix on 0.2.1.3-alpha.
27641 - The next version of Windows will be called Windows 8, and it has
27642 a major version of 6, minor version of 2. Correctly identify that
27643 version instead of calling it "Very recent version". Resolves
27644 ticket 4153; reported by funkstar.
27645 - Downgrade log messages about circuit timeout calibration from
27646 "notice" to "info": they don't require or suggest any human
27647 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27648 bugfix on 0.2.2.14-alpha.
27651 - Turn on directory request statistics by default and include them in
27652 extra-info descriptors. Don't break if we have no GeoIP database.
27653 Backported from 0.2.3.1-alpha; implements ticket 3951.
27654 - Update to the October 4 2011 Maxmind GeoLite Country database.
27657 Changes in version 0.2.1.31 - 2011-10-26
27658 Tor 0.2.1.31 backports important security and privacy fixes for
27659 oldstable. This release is intended only for package maintainers and
27660 others who cannot use the 0.2.2 stable series. All others should be
27661 using Tor 0.2.2.x or newer.
27663 o Security fixes (also included in 0.2.2.x):
27664 - Replace all potentially sensitive memory comparison operations
27665 with versions whose runtime does not depend on the data being
27666 compared. This will help resist a class of attacks where an
27667 adversary can use variations in timing information to learn
27668 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27669 implementation by Robert Ransom based partially on code by DJB.)
27670 - Fix an assert in parsing router descriptors containing IPv6
27671 addresses. This one took down the directory authorities when
27672 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27674 o Privacy/anonymity fixes (also included in 0.2.2.x):
27675 - Clients and bridges no longer send TLS certificate chains on
27676 outgoing OR connections. Previously, each client or bridge would
27677 use the same cert chain for all outgoing OR connections until
27678 its IP address changes, which allowed any relay that the client
27679 or bridge contacted to determine which entry guards it is using.
27680 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27681 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27682 no longer considers that connection as suitable for satisfying a
27683 circuit EXTEND request. Now relays can protect clients from the
27684 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27685 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27686 that they initiated. Relays could distinguish incoming bridge
27687 connections from client connections, creating another avenue for
27688 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27689 Found by "frosty_un".
27690 - When receiving a hidden service descriptor, check that it is for
27691 the hidden service we wanted. Previously, Tor would store any
27692 hidden service descriptors that a directory gave it, whether it
27693 wanted them or not. This wouldn't have let an attacker impersonate
27694 a hidden service, but it did let directories pre-seed a client
27695 with descriptors that it didn't want. Bugfix on 0.0.6.
27696 - Avoid linkability based on cached hidden service descriptors: forget
27697 all hidden service descriptors cached as a client when processing a
27698 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27699 - Make the bridge directory authority refuse to answer directory
27700 requests for "all" descriptors. It used to include bridge
27701 descriptors in its answer, which was a major information leak.
27702 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27703 - Don't attach new streams to old rendezvous circuits after SIGNAL
27704 NEWNYM. Previously, we would keep using an existing rendezvous
27705 circuit if it remained open (i.e. if it were kept open by a
27706 long-lived stream, or if a new stream were attached to it before
27707 Tor could notice that it was old and no longer in use). Bugfix on
27708 0.1.1.15-rc; fixes bug 3375.
27710 o Minor bugfixes (also included in 0.2.2.x):
27711 - When we restart our relay, we might get a successful connection
27712 from the outside before we've started our reachability tests,
27713 triggering a warning: "ORPort found reachable, but I have no
27714 routerinfo yet. Failing to inform controller of success." This
27715 bug was harmless unless Tor is running under a controller
27716 like Vidalia, in which case the controller would never get a
27717 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27719 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
27720 enabled. Fixes bug 1526.
27721 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27722 anything since 0.2.1.16-rc.
27723 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27724 None of the cases where we did this before were wrong, but by making
27725 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27726 - Fix a rare crash bug that could occur when a client was configured
27727 with a large number of bridges. Fixes bug 2629; bugfix on
27728 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27729 - Correct the warning displayed when a rendezvous descriptor exceeds
27730 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27732 - Fix an uncommon assertion failure when running with DNSPort under
27733 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27734 - When warning about missing zlib development packages during compile,
27735 give the correct package names. Bugfix on 0.2.0.1-alpha.
27736 - Require that introduction point keys and onion keys have public
27737 exponent 65537. Bugfix on 0.2.0.10-alpha.
27738 - Do not crash when our configuration file becomes unreadable, for
27739 example due to a permissions change, between when we start up
27740 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27742 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27744 - Always NUL-terminate the sun_path field of a sockaddr_un before
27745 passing it to the kernel. (Not a security issue: kernels are
27746 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27747 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27748 - Don't stack-allocate the list of supplementary GIDs when we're
27749 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27750 could take up to 256K, which is way too much stack. Found by
27751 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27753 o Minor bugfixes (only in 0.2.1.x):
27754 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
27755 rely on them. Bugfix on 0.2.1.30.
27756 - Use git revisions instead of svn revisions when generating our
27757 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27759 o Minor features (also included in 0.2.2.x):
27760 - Adjust the expiration time on our SSL session certificates to
27761 better match SSL certs seen in the wild. Resolves ticket 4014.
27762 - Allow nameservers with IPv6 address. Resolves bug 2574.
27763 - Update to the October 4 2011 Maxmind GeoLite Country database.
27766 Changes in version 0.2.3.5-alpha - 2011-09-28
27767 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
27768 bridge relays; fixes an assertion error that many users started hitting
27769 today; and adds the ability to refill token buckets more often than
27770 once per second, allowing significant performance improvements.
27773 - Bridge relays now do their directory fetches inside Tor TLS
27774 connections, like all the other clients do, rather than connecting
27775 directly to the DirPort like public relays do. Removes another
27776 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27777 - Bridges relays now build circuits for themselves in a more similar
27778 way to how clients build them. Removes another avenue for
27779 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27780 when bridges were introduced.
27783 - Fix an "Assertion md->held_by_node == 1 failed" error that could
27784 occur when the same microdescriptor was referenced by two node_t
27785 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
27787 o Major features (networking):
27788 - Add a new TokenBucketRefillInterval option to refill token buckets
27789 more frequently than once per second. This should improve network
27790 performance, alleviate queueing problems, and make traffic less
27791 bursty. Implements proposal 183; closes ticket 3630. Design by
27792 Florian Tschorsch and Björn Scheuermann; implementation by
27796 - Change an integer overflow check in the OpenBSD_Malloc code so
27797 that GCC is less likely to eliminate it as impossible. Patch
27798 from Mansour Moufid. Fixes bug 4059.
27800 o Minor bugfixes (usability):
27801 - Downgrade log messages about circuit timeout calibration from
27802 "notice" to "info": they don't require or suggest any human
27803 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27804 bugfix on 0.2.2.14-alpha.
27806 o Minor features (diagnostics):
27807 - When the system call to create a listener socket fails, log the
27808 error message explaining why. This may help diagnose bug 4027.
27811 Changes in version 0.2.3.4-alpha - 2011-09-13
27812 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
27813 tweak to Tor's TLS handshake that makes relays and bridges that run
27814 this new version reachable from Iran again. It also fixes a few new
27815 bugs in 0.2.3.x, and teaches relays to recognize when they're not
27816 listed in the network consensus and republish.
27818 o Major bugfixes (also part of 0.2.2.33):
27819 - Avoid an assertion failure when reloading a configuration with
27820 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27821 3923; bugfix on 0.2.2.25-alpha.
27823 o Minor features (security, also part of 0.2.2.33):
27824 - Check for replays of the public-key encrypted portion of an
27825 INTRODUCE1 cell, in addition to the current check for replays of
27826 the g^x value. This prevents a possible class of active attacks
27827 by an attacker who controls both an introduction point and a
27828 rendezvous point, and who uses the malleability of AES-CTR to
27829 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27830 that these attacks are infeasible (requiring the attacker to send
27831 on the order of zettabytes of altered cells in a short interval),
27832 but we'd rather block them off in case there are any classes of
27833 this attack that we missed. Reported by Willem Pinckaers.
27835 o Minor features (also part of 0.2.2.33):
27836 - Adjust the expiration time on our SSL session certificates to
27837 better match SSL certs seen in the wild. Resolves ticket 4014.
27838 - Change the default required uptime for a relay to be accepted as
27839 a HSDir (hidden service directory) from 24 hours to 25 hours.
27840 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27841 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27842 authorities to abstain from voting on assignment of the HSDir
27843 consensus flag. Related to bug 2649.
27844 - Update to the September 6 2011 Maxmind GeoLite Country database.
27846 o Minor bugfixes (also part of 0.2.2.33):
27847 - Demote the 'replay detected' log message emitted when a hidden
27848 service receives the same Diffie-Hellman public key in two different
27849 INTRODUCE2 cells to info level. A normal Tor client can cause that
27850 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27851 fixes part of bug 2442.
27852 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27853 level. There is nothing that a hidden service's operator can do
27854 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27856 - Clarify a log message specifying the characters permitted in
27857 HiddenServiceAuthorizeClient client names. Previously, the log
27858 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27859 given the impression that every ASCII character between "+" and "_"
27860 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27862 o Build fixes (also part of 0.2.2.33):
27863 - Clean up some code issues that prevented Tor from building on older
27864 BSDs. Fixes bug 3894; reported by "grarpamp".
27865 - Search for a platform-specific version of "ar" when cross-compiling.
27866 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27869 - Fix a bug where the SocksPort option (for example) would get
27870 ignored and replaced by the default if a SocksListenAddress
27871 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
27875 - Relays now try regenerating and uploading their descriptor more
27876 frequently if they are not listed in the consensus, or if the
27877 version of their descriptor listed in the consensus is too
27878 old. This fix should prevent situations where a server declines
27879 to re-publish itself because it has done so too recently, even
27880 though the authorities decided not to list its recent-enough
27881 descriptor. Fix for bug 3327.
27884 - Relays now include a reason for regenerating their descriptors
27885 in an HTTP header when uploading to the authorities. This will
27886 make it easier to debug descriptor-upload issues in the future.
27887 - When starting as root and then changing our UID via the User
27888 control option, and we have a ControlSocket configured, make sure
27889 that the ControlSocket is owned by the same account that Tor will
27890 run under. Implements ticket 3421; fix by Jérémy Bobbio.
27893 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
27894 utility function used in the control-port code). This shouldn't
27895 ever happen unless Tor is completely out of memory, but if it did
27896 happen and Tor somehow recovered from it, Tor could have sent a log
27897 message to a control port in the middle of a reply to a controller
27898 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
27899 - Make 'FetchUselessDescriptors' cause all descriptor types and
27900 all consensus types (including microdescriptors) to get fetched.
27901 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
27903 o Code refactoring:
27904 - Make a new "entry connection" struct as an internal subtype of "edge
27905 connection", to simplify the code and make exit connections smaller.
27908 Changes in version 0.2.2.33 - 2011-09-13
27909 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
27910 TLS handshake that makes relays and bridges that run this new version
27911 reachable from Iran again.
27914 - Avoid an assertion failure when reloading a configuration with
27915 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27916 3923; bugfix on 0.2.2.25-alpha.
27918 o Minor features (security):
27919 - Check for replays of the public-key encrypted portion of an
27920 INTRODUCE1 cell, in addition to the current check for replays of
27921 the g^x value. This prevents a possible class of active attacks
27922 by an attacker who controls both an introduction point and a
27923 rendezvous point, and who uses the malleability of AES-CTR to
27924 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27925 that these attacks are infeasible (requiring the attacker to send
27926 on the order of zettabytes of altered cells in a short interval),
27927 but we'd rather block them off in case there are any classes of
27928 this attack that we missed. Reported by Willem Pinckaers.
27931 - Adjust the expiration time on our SSL session certificates to
27932 better match SSL certs seen in the wild. Resolves ticket 4014.
27933 - Change the default required uptime for a relay to be accepted as
27934 a HSDir (hidden service directory) from 24 hours to 25 hours.
27935 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27936 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27937 authorities to abstain from voting on assignment of the HSDir
27938 consensus flag. Related to bug 2649.
27939 - Update to the September 6 2011 Maxmind GeoLite Country database.
27941 o Minor bugfixes (documentation and log messages):
27942 - Correct the man page to explain that HashedControlPassword and
27943 CookieAuthentication can both be set, in which case either method
27944 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27945 when we decided to allow these config options to both be set. Issue
27946 raised by bug 3898.
27947 - Demote the 'replay detected' log message emitted when a hidden
27948 service receives the same Diffie-Hellman public key in two different
27949 INTRODUCE2 cells to info level. A normal Tor client can cause that
27950 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27951 fixes part of bug 2442.
27952 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27953 level. There is nothing that a hidden service's operator can do
27954 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27956 - Clarify a log message specifying the characters permitted in
27957 HiddenServiceAuthorizeClient client names. Previously, the log
27958 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27959 given the impression that every ASCII character between "+" and "_"
27960 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27963 - Provide a substitute implementation of lround() for MSVC, which
27964 apparently lacks it. Patch from Gisle Vanem.
27965 - Clean up some code issues that prevented Tor from building on older
27966 BSDs. Fixes bug 3894; reported by "grarpamp".
27967 - Search for a platform-specific version of "ar" when cross-compiling.
27968 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27971 Changes in version 0.2.3.3-alpha - 2011-09-01
27972 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
27973 security, and provides client-side support for the microdescriptor
27974 and optimistic data features introduced earlier in the 0.2.3.x
27975 series. It also includes numerous critical bugfixes in the (optional)
27976 bufferevent-based networking backend.
27978 o Major features (stream isolation):
27979 - You can now configure Tor so that streams from different
27980 applications are isolated on different circuits, to prevent an
27981 attacker who sees your streams as they leave an exit node from
27982 linking your sessions to one another. To do this, choose some way
27983 to distinguish the applications: have them connect to different
27984 SocksPorts, or have one of them use SOCKS4 while the other uses
27985 SOCKS5, or have them pass different authentication strings to the
27986 SOCKS proxy. Then, use the new SocksPort syntax to configure the
27987 degree of isolation you need. This implements Proposal 171.
27988 - There's a new syntax for specifying multiple client ports (such as
27989 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
27990 multiple *Port entries with full addr:port syntax on each.
27991 The old *ListenAddress format is still supported, but you can't
27992 mix it with the new *Port syntax.
27994 o Major features (other):
27995 - Enable microdescriptor fetching by default for clients. This allows
27996 clients to download a much smaller amount of directory information.
27997 To disable it (and go back to the old-style consensus and
27998 descriptors), set "UseMicrodescriptors 0" in your torrc file.
27999 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
28000 "PortForwarding" config option), now supports Windows.
28001 - When using an exit relay running 0.2.3.x, clients can now
28002 "optimistically" send data before the exit relay reports that
28003 the stream has opened. This saves a round trip when starting
28004 connections where the client speaks first (such as web browsing).
28005 This behavior is controlled by a consensus parameter (currently
28006 disabled). To turn it on or off manually, use the "OptimisticData"
28007 torrc option. Implements proposal 181; code by Ian Goldberg.
28009 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
28010 - When using IOCP on Windows, we need to enable Libevent windows
28012 - The IOCP backend now works even when the user has not specified
28013 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
28014 Fixes part of bug 3752.
28015 - Correctly record the bytes we've read and written when using
28016 bufferevents, so that we can include them in our bandwidth history
28017 and advertised bandwidth. Fixes bug 3803.
28018 - Apply rate-limiting only at the bottom of a chain of filtering
28019 bufferevents. This prevents us from filling up internal read
28020 buffers and violating rate-limits when filtering bufferevents
28021 are enabled. Fixes part of bug 3804.
28022 - Add high-watermarks to the output buffers for filtered
28023 bufferevents. This prevents us from filling up internal write
28024 buffers and wasting CPU cycles when filtering bufferevents are
28025 enabled. Fixes part of bug 3804.
28026 - Correctly notice when data has been written from a bufferevent
28027 without flushing it completely. Fixes bug 3805.
28028 - Fix a bug where server-side tunneled bufferevent-based directory
28029 streams would get closed prematurely. Fixes bug 3814.
28030 - Fix a use-after-free error with per-connection rate-limiting
28031 buckets. Fixes bug 3888.
28033 o Major bugfixes (also part of 0.2.2.31-rc):
28034 - If we're configured to write our ControlPorts to disk, only write
28035 them after switching UID and creating the data directory. This way,
28036 we don't fail when starting up with a nonexistent DataDirectory
28037 and a ControlPortWriteToFile setting based on that directory. Fixes
28038 bug 3747; bugfix on Tor 0.2.2.26-beta.
28041 - Added a new CONF_CHANGED event so that controllers can be notified
28042 of any configuration changes made by other controllers, or by the
28043 user. Implements ticket 1692.
28044 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
28045 leak when using bufferevents, and lets Libevent worry about how to
28046 best copy data out of a buffer.
28047 - Replace files in stats/ rather than appending to them. Now that we
28048 include statistics in extra-info descriptors, it makes no sense to
28049 keep old statistics forever. Implements ticket 2930.
28051 o Minor features (build compatibility):
28052 - Limited, experimental support for building with nmake and MSVC.
28053 - Provide a substitute implementation of lround() for MSVC, which
28054 apparently lacks it. Patch from Gisle Vanem.
28056 o Minor features (also part of 0.2.2.31-rc):
28057 - Update to the August 2 2011 Maxmind GeoLite Country database.
28059 o Minor bugfixes (on 0.2.3.x-alpha):
28060 - Fix a spurious warning when parsing SOCKS requests with
28061 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
28062 - Get rid of a harmless warning that could happen on relays running
28063 with bufferevents. The warning was caused by someone doing an http
28064 request to a relay's orport. Also don't warn for a few related
28065 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
28067 o Minor bugfixes (on 2.2.x and earlier):
28068 - Correct the man page to explain that HashedControlPassword and
28069 CookieAuthentication can both be set, in which case either method
28070 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
28071 when we decided to allow these config options to both be set. Issue
28072 raised by bug 3898.
28073 - The "--quiet" and "--hush" options now apply not only to Tor's
28074 behavior before logs are configured, but also to Tor's behavior in
28075 the absence of configured logs. Fixes bug 3550; bugfix on
28078 o Minor bugfixes (also part of 0.2.2.31-rc):
28079 - Write several files in text mode, on OSes that distinguish text
28080 mode from binary mode (namely, Windows). These files are:
28081 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28082 that collect those statistics; 'client_keys' and 'hostname' for
28083 hidden services that use authentication; and (in the tor-gencert
28084 utility) newly generated identity and signing keys. Previously,
28085 we wouldn't specify text mode or binary mode, leading to an
28086 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28087 the DirRecordUsageByCountry option which would have triggered
28088 the assertion failure was added), although this assertion failure
28089 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28090 - Selectively disable deprecation warnings on OS X because Lion
28091 started deprecating the shipped copy of openssl. Fixes bug 3643.
28092 - Remove an extra pair of quotation marks around the error
28093 message in control-port STATUS_GENERAL BUG events. Bugfix on
28094 0.1.2.6-alpha; fixes bug 3732.
28095 - When unable to format an address as a string, report its value
28096 as "???" rather than reusing the last formatted address. Bugfix
28099 o Code simplifications and refactoring:
28100 - Rewrite the listener-selection logic so that parsing which ports
28101 we want to listen on is now separate from binding to the ports
28105 - Building Tor with bufferevent support now requires Libevent
28106 2.0.13-stable or later. Previous versions of Libevent had bugs in
28107 SSL-related bufferevents and related issues that would make Tor
28108 work badly with bufferevents. Requiring 2.0.13-stable also allows
28109 Tor with bufferevents to take advantage of Libevent APIs
28110 introduced after 2.0.8-rc.
28113 Changes in version 0.2.2.32 - 2011-08-27
28114 The Tor 0.2.2 release series is dedicated to the memory of Andreas
28115 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
28116 a founder of the PETS community, a leader in our field, a mentor,
28117 and a friend. He left us with these words: "I had the possibility
28118 to contribute to this world that is not as it should be. I hope I
28119 could help in some areas to make the world a better place, and that
28120 I could also encourage other people to be engaged in improving the
28121 world. Please, stay engaged. This world needs you, your love, your
28122 initiative -- now I cannot be part of that anymore."
28124 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
28125 ready. More than two years in the making, this release features improved
28126 client performance and hidden service reliability, better compatibility
28127 for Android, correct behavior for bridges that listen on more than
28128 one address, more extensible and flexible directory object handling,
28129 better reporting of network statistics, improved code security, and
28130 many many other features and bugfixes.
28133 Changes in version 0.2.2.31-rc - 2011-08-17
28134 Tor 0.2.2.31-rc is the second and hopefully final release candidate
28135 for the Tor 0.2.2.x series.
28138 - Remove an extra pair of quotation marks around the error
28139 message in control-port STATUS_GENERAL BUG events. Bugfix on
28140 0.1.2.6-alpha; fixes bug 3732.
28141 - If we're configured to write our ControlPorts to disk, only write
28142 them after switching UID and creating the data directory. This way,
28143 we don't fail when starting up with a nonexistent DataDirectory
28144 and a ControlPortWriteToFile setting based on that directory. Fixes
28145 bug 3747; bugfix on Tor 0.2.2.26-beta.
28148 - Update to the August 2 2011 Maxmind GeoLite Country database.
28151 - Allow GETINFO fingerprint to return a fingerprint even when
28152 we have not yet built a router descriptor. Fixes bug 3577;
28153 bugfix on 0.2.0.1-alpha.
28154 - Write several files in text mode, on OSes that distinguish text
28155 mode from binary mode (namely, Windows). These files are:
28156 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
28157 that collect those statistics; 'client_keys' and 'hostname' for
28158 hidden services that use authentication; and (in the tor-gencert
28159 utility) newly generated identity and signing keys. Previously,
28160 we wouldn't specify text mode or binary mode, leading to an
28161 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
28162 the DirRecordUsageByCountry option which would have triggered
28163 the assertion failure was added), although this assertion failure
28164 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
28165 - Selectively disable deprecation warnings on OS X because Lion
28166 started deprecating the shipped copy of openssl. Fixes bug 3643.
28167 - When unable to format an address as a string, report its value
28168 as "???" rather than reusing the last formatted address. Bugfix
28172 Changes in version 0.2.3.2-alpha - 2011-07-18
28173 Tor 0.2.3.2-alpha introduces two new experimental features:
28174 microdescriptors and pluggable transports. It also continues cleaning
28175 up a variety of recently introduced features.
28178 - Clients can now use microdescriptors instead of regular descriptors
28179 to build circuits. Microdescriptors are authority-generated
28180 summaries of regular descriptors' contents, designed to change
28181 very rarely (see proposal 158 for details). This feature is
28182 designed to save bandwidth, especially for clients on slow internet
28183 connections. It's off by default for now, since nearly no caches
28184 support it, but it will be on-by-default for clients in a future
28185 version. You can use the UseMicrodescriptors option to turn it on.
28186 - Tor clients using bridges can now be configured to use a separate
28187 'transport' proxy for each bridge. This approach helps to resist
28188 censorship by allowing bridges to use protocol obfuscation
28189 plugins. It implements part of proposal 180. Implements ticket 2841.
28190 - While we're trying to bootstrap, record how many TLS connections
28191 fail in each state, and report which states saw the most failures
28192 in response to any bootstrap failures. This feature may speed up
28193 diagnosis of censorship events. Implements ticket 3116.
28195 o Major bugfixes (on 0.2.3.1-alpha):
28196 - When configuring a large set of nodes in EntryNodes (as with
28197 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
28198 random subset to be guards, and choose them in random
28199 order. Fixes bug 2798.
28200 - Tor could crash when remembering a consensus in a non-used consensus
28201 flavor without having a current consensus set. Fixes bug 3361.
28202 - Comparing an unknown address to a microdescriptor's shortened exit
28203 policy would always give a "rejected" result. Fixes bug 3599.
28204 - Using microdescriptors as a client no longer prevents Tor from
28205 uploading and downloading hidden service descriptors. Fixes
28209 - Allow nameservers with IPv6 address. Resolves bug 2574.
28210 - Accept attempts to include a password authenticator in the
28211 handshake, as supported by SOCKS5. This handles SOCKS clients that
28212 don't know how to omit a password when authenticating. Resolves
28214 - When configuring a large set of nodes in EntryNodes, and there are
28215 enough of them listed as Guard so that we don't need to consider
28216 the non-guard entries, prefer the ones listed with the Guard flag.
28217 - Check for and recover from inconsistency in the microdescriptor
28218 cache. This will make it harder for us to accidentally free a
28219 microdescriptor without removing it from the appropriate data
28220 structures. Fixes issue 3135; issue noted by "wanoskarnet".
28221 - Log SSL state transitions at log level DEBUG, log domain
28222 HANDSHAKE. This can be useful for debugging censorship events.
28223 Implements ticket 3264.
28224 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
28225 implements ticket 3439.
28227 o Minor bugfixes (on 0.2.3.1-alpha):
28228 - Do not free all general-purpose regular descriptors just
28229 because microdescriptor use is enabled. Fixes bug 3113.
28230 - Correctly link libevent_openssl when --enable-static-libevent
28231 is passed to configure. Fixes bug 3118.
28232 - Bridges should not complain during their heartbeat log messages that
28233 they are unlisted in the consensus: that's more or less the point
28234 of being a bridge. Fixes bug 3183.
28235 - Report a SIGNAL event to controllers when acting on a delayed
28236 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28237 event to the controller if we acted on a SIGNAL NEWNYM command
28238 immediately, and otherwise not report a SIGNAL event for the
28239 command at all. Fixes bug 3349.
28240 - Fix a crash when handling the SIGNAL controller command or
28241 reporting ERR-level status events with bufferevents enabled. Found
28242 by Robert Ransom. Fixes bug 3367.
28243 - Always ship the tor-fw-helper manpage in our release tarballs.
28244 Fixes bug 3389. Reported by Stephen Walker.
28245 - Fix a class of double-mark-for-close bugs when bufferevents
28246 are enabled. Fixes bug 3403.
28247 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28248 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28249 control-port command. Fixes part of bug 3465.
28250 - Prevent using negative indices during unit test runs when read_all()
28251 fails. Spotted by coverity.
28252 - Fix a rare memory leak when checking the nodelist without it being
28253 present. Found by coverity.
28254 - Only try to download a microdescriptor-flavored consensus from
28255 a directory cache that provides them.
28257 o Minor bugfixes (on 0.2.2.x and earlier):
28258 - Assert that hidden-service-related operations are not performed
28259 using single-hop circuits. Previously, Tor would assert that
28260 client-side streams are not attached to single-hop circuits,
28261 but not that other sensitive operations on the client and service
28262 side are not performed using single-hop circuits. Fixes bug 3332;
28264 - Don't publish a new relay descriptor when we reload our onion key,
28265 unless the onion key has actually changed. Fixes bug 3263 and
28266 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28267 - Allow GETINFO fingerprint to return a fingerprint even when
28268 we have not yet built a router descriptor. Fixes bug 3577;
28269 bugfix on 0.2.0.1-alpha.
28270 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28271 on 0.2.2.4-alpha; fixes bug 3427.
28273 o Code simplification and refactoring:
28274 - Use tor_sscanf() in place of scanf() in more places through the
28275 code. This makes us a little more locale-independent, and
28276 should help shut up code-analysis tools that can't tell
28277 a safe sscanf string from a dangerous one.
28278 - Use tt_assert(), not tor_assert(), for checking for test failures.
28279 This makes the unit tests more able to go on in the event that
28281 - Split connection_about_to_close() into separate functions for each
28285 - On Windows, we now define the _WIN32_WINNT macros only if they
28286 are not already defined. This lets the person building Tor decide,
28287 if they want, to require a later version of Windows.
28290 Changes in version 0.2.2.30-rc - 2011-07-07
28291 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28292 series. It fixes a few smaller bugs, but generally appears stable.
28293 Please test it and let us know whether it is!
28296 - Send a SUCCEEDED stream event to the controller when a reverse
28297 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28298 discovered by katmagic.
28299 - Always NUL-terminate the sun_path field of a sockaddr_un before
28300 passing it to the kernel. (Not a security issue: kernels are
28301 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28302 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28303 - Don't stack-allocate the list of supplementary GIDs when we're
28304 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28305 could take up to 256K, which is way too much stack. Found by
28306 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28307 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28308 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28309 fixes part of bug 3465.
28310 - Fix a memory leak when receiving a descriptor for a hidden
28311 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28315 - Update to the July 1 2011 Maxmind GeoLite Country database.
28318 Changes in version 0.2.2.29-beta - 2011-06-20
28319 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28320 have bridge lines in their torrc but don't want to use them; gets
28321 us closer to having the control socket feature working on Debian;
28322 and fixes a variety of smaller bugs.
28325 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28326 When we changed the default behavior to "use bridges if any
28327 are listed in the torrc", we surprised users who had bridges
28328 in their torrc files but who didn't actually want to use them.
28329 Partial resolution for bug 3354.
28332 - Don't attach new streams to old rendezvous circuits after SIGNAL
28333 NEWNYM. Previously, we would keep using an existing rendezvous
28334 circuit if it remained open (i.e. if it were kept open by a
28335 long-lived stream, or if a new stream were attached to it before
28336 Tor could notice that it was old and no longer in use). Bugfix on
28337 0.1.1.15-rc; fixes bug 3375.
28340 - Fix a bug when using ControlSocketsGroupWritable with User. The
28341 directory's group would be checked against the current group, not
28342 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28343 bugfix on 0.2.2.26-beta.
28344 - Make connection_printf_to_buf()'s behavior sane. Its callers
28345 expect it to emit a CRLF iff the format string ends with CRLF;
28346 it actually emitted a CRLF iff (a) the format string ended with
28347 CRLF or (b) the resulting string was over 1023 characters long or
28348 (c) the format string did not end with CRLF *and* the resulting
28349 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28350 fixes part of bug 3407.
28351 - Make send_control_event_impl()'s behavior sane. Its callers
28352 expect it to always emit a CRLF at the end of the string; it
28353 might have emitted extra control characters as well. Bugfix on
28354 0.1.1.9-alpha; fixes another part of bug 3407.
28355 - Make crypto_rand_int() check the value of its input correctly.
28356 Previously, it accepted values up to UINT_MAX, but could return a
28357 negative number if given a value above INT_MAX+1. Found by George
28358 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28359 - Avoid a segfault when reading a malformed circuit build state
28360 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28362 - When asked about a DNS record type we don't support via a
28363 client DNSPort, reply with NOTIMPL rather than an empty
28364 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28365 - Fix a rare memory leak during stats writing. Found by coverity.
28368 - Update to the June 1 2011 Maxmind GeoLite Country database.
28370 o Code simplifications and refactoring:
28371 - Remove some dead code as indicated by coverity.
28372 - Remove a few dead assignments during router parsing. Found by
28374 - Add some forgotten return value checks during unit tests. Found
28376 - Don't use 1-bit wide signed bit fields. Found by coverity.
28379 Changes in version 0.2.2.28-beta - 2011-06-04
28380 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28381 fixed a big bug in whether relays stay in the consensus consistently,
28382 we moved closer to handling bridges and hidden services correctly,
28383 and we started the process of better handling the dreaded "my Vidalia
28384 died, and now my Tor demands a password when I try to reconnect to it"
28388 - Don't decide to make a new descriptor when receiving a HUP signal.
28389 This bug has caused a lot of 0.2.2.x relays to disappear from the
28390 consensus periodically. Fixes the most common case of triggering
28391 bug 1810; bugfix on 0.2.2.7-alpha.
28392 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28393 - Don't try to build descriptors if "ORPort auto" is set and we
28394 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28396 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28397 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28398 - Apply circuit timeouts to opened hidden-service-related circuits
28399 based on the correct start time. Previously, we would apply the
28400 circuit build timeout based on time since the circuit's creation;
28401 it was supposed to be applied based on time since the circuit
28402 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28403 - Use the same circuit timeout for client-side introduction
28404 circuits as for other four-hop circuits, rather than the timeout
28405 for single-hop directory-fetch circuits; the shorter timeout may
28406 have been appropriate with the static circuit build timeout in
28407 0.2.1.x and earlier, but caused many hidden service access attempts
28408 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28409 on 0.2.2.2-alpha; fixes another part of bug 1297.
28410 - In ticket 2511 we fixed a case where you could use an unconfigured
28411 bridge if you had configured it as a bridge the last time you ran
28412 Tor. Now fix another edge case: if you had configured it as a bridge
28413 but then switched to a different bridge via the controller, you
28414 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28418 - Add an __OwningControllerProcess configuration option and a
28419 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28420 that when it exits, Tor will shut down. Implements feature 3049.
28421 - If "UseBridges 1" is set and no bridges are configured, Tor will
28422 now refuse to build any circuits until some bridges are set.
28423 If "UseBridges auto" is set, Tor will use bridges if they are
28424 configured and we are not running as a server, but otherwise will
28425 make circuits as usual. The new default is "auto". Patch by anonym,
28426 so the Tails LiveCD can stop automatically revealing you as a Tor
28430 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28431 - Remove a trailing asterisk from "exit-policy/default" in the
28432 output of the control port command "GETINFO info/names". Bugfix
28434 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28436 - Warn when the user configures two HiddenServiceDir lines that point
28437 to the same directory. Bugfix on 0.0.6 (the version introducing
28438 HiddenServiceDir); fixes bug 3289.
28439 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28440 part of bug 2748; bugfix on 0.2.0.10-alpha.
28441 - Log malformed requests for rendezvous descriptors as protocol
28442 warnings, not warnings. Also, use a more informative log message
28443 in case someone sees it at log level warning without prior
28444 info-level messages. Fixes the other part of bug 2748; bugfix
28446 - Clear the table recording the time of the last request for each
28447 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
28448 Previously, we would clear our HS descriptor cache on SIGNAL
28449 NEWNYM, but if we had previously retrieved a descriptor (or tried
28450 to) from every directory responsible for it, we would refuse to
28451 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
28453 - Fix a log message that said "bits" while displaying a value in
28454 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
28456 - When checking for 1024-bit keys, check for 1024 bits, not 128
28457 bytes. This allows Tor to correctly discard keys of length 1017
28458 through 1023. Bugfix on 0.0.9pre5.
28461 - Relays now log the reason for publishing a new relay descriptor,
28462 so we have a better chance of hunting down instances of bug 1810.
28463 Resolves ticket 3252.
28464 - Revise most log messages that refer to nodes by nickname to
28465 instead use the "$key=nickname at address" format. This should be
28466 more useful, especially since nicknames are less and less likely
28467 to be unique. Resolves ticket 3045.
28468 - Log (at info level) when purging pieces of hidden-service-client
28469 state because of SIGNAL NEWNYM.
28472 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28473 anything since 0.2.1.16-rc.
28476 Changes in version 0.2.2.27-beta - 2011-05-18
28477 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
28478 release, and also adds a few more general bugfixes.
28481 - Fix a crash bug when changing bridges in a running Tor process.
28482 Fixes bug 3213; bugfix on 0.2.2.26-beta.
28483 - When the controller configures a new bridge, don't wait 10 to 60
28484 seconds before trying to fetch its descriptor. Bugfix on
28485 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
28488 - Require that onion keys have exponent 65537 in microdescriptors too.
28489 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
28490 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
28491 Changed the limit to 512 characters by removing base64 newlines.
28492 Fixes bug 2752. Fix by Michael Yakubovich.
28493 - When a client starts or stops using bridges, never use a circuit
28494 that was built before the configuration change. This behavior could
28495 put at risk a user who uses bridges to ensure that her traffic
28496 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
28500 Changes in version 0.2.2.26-beta - 2011-05-17
28501 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
28502 also introduces a new "socksport auto" approach that should make it
28503 easier to run multiple Tors on the same system, and does a lot of
28504 cleanup to get us closer to a release candidate.
28506 o Security/privacy fixes:
28507 - Replace all potentially sensitive memory comparison operations
28508 with versions whose runtime does not depend on the data being
28509 compared. This will help resist a class of attacks where an
28510 adversary can use variations in timing information to learn
28511 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28512 implementation by Robert Ransom based partially on code by DJB.)
28513 - When receiving a hidden service descriptor, check that it is for
28514 the hidden service we wanted. Previously, Tor would store any
28515 hidden service descriptors that a directory gave it, whether it
28516 wanted them or not. This wouldn't have let an attacker impersonate
28517 a hidden service, but it did let directories pre-seed a client
28518 with descriptors that it didn't want. Bugfix on 0.0.6.
28519 - On SIGHUP, do not clear out all TrackHostExits mappings, client
28520 DNS cache entries, and virtual address mappings: that's what
28521 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
28524 - The options SocksPort, ControlPort, and so on now all accept a
28525 value "auto" that opens a socket on an OS-selected port. A
28526 new ControlPortWriteToFile option tells Tor to write its
28527 actual control port or ports to a chosen file. If the option
28528 ControlPortFileGroupReadable is set, the file is created as
28529 group-readable. Now users can run two Tor clients on the same
28530 system without needing to manually mess with parameters. Resolves
28531 part of ticket 3076.
28532 - Set SO_REUSEADDR on all sockets, not just listeners. This should
28533 help busy exit nodes avoid running out of useable ports just
28534 because all the ports have been used in the near past. Resolves
28538 - New "GETINFO net/listeners/(type)" controller command to return
28539 a list of addresses and ports that are bound for listeners for a
28540 given connection type. This is useful when the user has configured
28541 "SocksPort auto" and the controller needs to know which port got
28542 chosen. Resolves another part of ticket 3076.
28543 - Add a new ControlSocketsGroupWritable configuration option: when
28544 it is turned on, ControlSockets are group-writeable by the default
28545 group of the current user. Patch by Jérémy Bobbio; implements
28547 - Tor now refuses to create a ControlSocket in a directory that is
28548 world-readable (or group-readable if ControlSocketsGroupWritable
28549 is 0). This is necessary because some operating systems do not
28550 enforce permissions on an AF_UNIX sockets. Permissions on the
28551 directory holding the socket, however, seems to work everywhere.
28552 - Rate-limit a warning about failures to download v2 networkstatus
28553 documents. Resolves part of bug 1352.
28554 - Backport code from 0.2.3.x that allows directory authorities to
28555 clean their microdescriptor caches. Needed to resolve bug 2230.
28556 - When an HTTPS proxy reports "403 Forbidden", we now explain
28557 what it means rather than calling it an unexpected status code.
28558 Closes bug 2503. Patch from Michael Yakubovich.
28559 - Update to the May 1 2011 Maxmind GeoLite Country database.
28562 - Authorities now clean their microdesc cache periodically and when
28563 reading from disk initially, not only when adding new descriptors.
28564 This prevents a bug where we could lose microdescriptors. Bugfix
28565 on 0.2.2.6-alpha. Fixes bug 2230.
28566 - Do not crash when our configuration file becomes unreadable, for
28567 example due to a permissions change, between when we start up
28568 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28570 - Avoid a bug that would keep us from replacing a microdescriptor
28571 cache on Windows. (We would try to replace the file while still
28572 holding it open. That's fine on Unix, but Windows doesn't let us
28573 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28574 - Add missing explanations for the authority-related torrc options
28575 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28576 man page. Resolves issue 2379.
28577 - As an authority, do not upload our own vote or signature set to
28578 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28579 it would get flagged as a duplicate. Resolves bug 3026.
28580 - Accept hidden service descriptors if we think we might be a hidden
28581 service directory, regardless of what our consensus says. This
28582 helps robustness, since clients and hidden services can sometimes
28583 have a more up-to-date view of the network consensus than we do,
28584 and if they think that the directory authorities list us a HSDir,
28585 we might actually be one. Related to bug 2732; bugfix on
28587 - When a controller changes TrackHostExits, remove mappings for
28588 hosts that should no longer have their exits tracked. Bugfix on
28590 - When a controller changes VirtualAddrNetwork, remove any mappings
28591 for hosts that were automapped to the old network. Bugfix on
28593 - When a controller changes one of the AutomapHosts* options, remove
28594 any mappings for hosts that should no longer be automapped. Bugfix
28596 - Do not reset the bridge descriptor download status every time we
28597 re-parse our configuration or get a configuration change. Fixes
28598 bug 3019; bugfix on 0.2.0.3-alpha.
28600 o Minor bugfixes (code cleanup):
28601 - When loading the microdesc journal, remember its current size.
28602 In 0.2.2, this helps prevent the microdesc journal from growing
28603 without limit on authorities (who are the only ones to use it in
28604 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28605 Fix posted by "cypherpunks."
28606 - The microdesc journal is supposed to get rebuilt only if it is
28607 at least _half_ the length of the store, not _twice_ the length
28608 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28609 - Fix a potential null-pointer dereference while computing a
28610 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
28612 - Avoid a possible null-pointer dereference when rebuilding the mdesc
28613 cache without actually having any descriptors to cache. Bugfix on
28614 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
28615 - If we fail to compute the identity digest of a v3 legacy keypair,
28616 warn, and don't use a buffer-full of junk instead. Bugfix on
28617 0.2.1.1-alpha; fixes bug 3106.
28618 - Resolve an untriggerable issue in smartlist_string_num_isin(),
28619 where if the function had ever in the future been used to check
28620 for the presence of a too-large number, it would have given an
28621 incorrect result. (Fortunately, we only used it for 16-bit
28622 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
28623 - Require that introduction point keys and onion handshake keys
28624 have a public exponent of 65537. Starts to fix bug 3207; bugfix
28627 o Removed features:
28628 - Caches no longer download and serve v2 networkstatus documents
28629 unless FetchV2Networkstatus flag is set: these documents haven't
28630 haven't been used by clients or relays since 0.2.0.x. Resolves
28634 Changes in version 0.2.3.1-alpha - 2011-05-05
28635 Tor 0.2.3.1-alpha adds some new experimental features, including support
28636 for an improved network IO backend, IOCP networking on Windows,
28637 microdescriptor caching, "fast-start" support for streams, and automatic
28638 home router configuration. There are also numerous internal improvements
28639 to try to make the code easier for developers to work with.
28641 This is the first alpha release in a new series, so expect there to be
28642 bugs. Users who would rather test out a more stable branch should
28643 stay with 0.2.2.x for now.
28646 - Tor can now optionally build with the "bufferevents" buffered IO
28647 backend provided by Libevent 2. To use this feature, make sure you
28648 have the latest possible version of Libevent, and pass the
28649 --enable-bufferevents flag to configure when building Tor from
28650 source. This feature will make our networking code more flexible,
28651 let us stack layers on each other, and let us use more efficient
28652 zero-copy transports where available.
28653 - As an experimental feature, Tor can use IOCP for networking on Windows.
28654 Once this code is tuned and optimized, it promises much better
28655 performance than the select-based backend we've used in the past. To
28656 try this feature, you must build Tor with Libevent 2, configure Tor
28657 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
28658 your torrc. There are known bugs here: only try this if you can help
28659 debug it as it breaks.
28660 - The EntryNodes option can now include country codes like {de} or IP
28661 addresses or network masks. Previously we had disallowed these options
28662 because we didn't have an efficient way to keep the list up to
28663 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
28664 - Exit nodes now accept and queue data on not-yet-connected streams.
28665 Previously, the client wasn't allowed to send data until the stream was
28666 connected, which slowed down all connections. This change will enable
28667 clients to perform a "fast-start" on streams and send data without
28668 having to wait for a confirmation that the stream has opened. (Patch
28669 from Ian Goldberg; implements the server side of Proposal 174.)
28670 - Tor now has initial support for automatic port mapping on the many
28671 home routers that support NAT-PMP or UPnP. (Not yet supported on
28672 Windows). To build the support code, you'll need to have libnatpnp
28673 library and/or the libminiupnpc library, and you'll need to enable the
28674 feature specifically by passing "--enable-upnp" and/or
28675 "--enable-natpnp" to configure. To turn it on, use the new
28676 PortForwarding option.
28677 - Caches now download, cache, and serve multiple "flavors" of the
28678 consensus, including a flavor that describes microdescriptors.
28679 - Caches now download, cache, and serve microdescriptors -- small
28680 summaries of router descriptors that are authenticated by all of the
28681 directory authorities. Once enough caches are running this code,
28682 clients will be able to save significant amounts of directory bandwidth
28683 by downloading microdescriptors instead of router descriptors.
28686 - Make logging resolution configurable with a new LogTimeGranularity
28687 option, and change the default from 1 millisecond to 1 second.
28688 Implements enhancement 1668.
28689 - We log which torrc file we're using on startup. Implements ticket
28691 - Ordinarily, Tor does not count traffic from private addresses (like
28692 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
28693 There is now a new option, CountPrivateBandwidth, to disable this
28694 behavior. Patch from Daniel Cagara.
28695 - New --enable-static-tor configure option for building Tor as
28696 statically as possible. Idea, general hackery and thoughts from
28697 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
28699 - If you set the NumCPUs option to 0, Tor will now try to detect how
28700 many CPUs you have. This is the new default behavior.
28701 - Turn on directory request statistics by default and include them in
28702 extra-info descriptors. Don't break if we have no GeoIP database.
28703 - Relays that set "ConnDirectionStatistics 1" write statistics on the
28704 bidirectional use of connections to disk every 24 hours.
28705 - Add a GeoIP file digest to the extra-info descriptor. Implements
28707 - The NodeFamily option -- which let you declare that you want to
28708 consider nodes to be part of a family whether they list themselves
28709 that way or not -- now allows IP address ranges and country codes.
28710 - Add a new 'Heartbeat' log message type to periodically log a message
28711 describing Tor's status at level Notice. This feature is meant for
28712 operators who log at notice, and want to make sure that their Tor
28713 server is still working. Implementation by George Kadianakis.
28715 o Minor bugfixes (on 0.2.2.25-alpha):
28716 - When loading the microdesc journal, remember its current size.
28717 In 0.2.2, this helps prevent the microdesc journal from growing
28718 without limit on authorities (who are the only ones to use it in
28719 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28720 Fix posted by "cypherpunks."
28721 - The microdesc journal is supposed to get rebuilt only if it is
28722 at least _half_ the length of the store, not _twice_ the length
28723 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28724 - If as an authority we fail to compute the identity digest of a v3
28725 legacy keypair, warn, and don't use a buffer-full of junk instead.
28726 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
28727 - Authorities now clean their microdesc cache periodically and when
28728 reading from disk initially, not only when adding new descriptors.
28729 This prevents a bug where we could lose microdescriptors. Bugfix
28732 o Minor features (controller):
28733 - Add a new SIGNAL event to the controller interface so that
28734 controllers can be notified when Tor handles a signal. Resolves
28735 issue 1955. Patch by John Brooks.
28736 - Add a new GETINFO option to get total bytes read and written. Patch
28737 from pipe, revised by atagar. Resolves ticket 2345.
28738 - Implement some GETINFO controller fields to provide information about
28739 the Tor process's pid, euid, username, and resource limits.
28742 - Our build system requires automake 1.6 or later to create the
28743 Makefile.in files. Previously, you could have used 1.4.
28744 This only affects developers and people building Tor from git;
28745 people who build Tor from the source distribution without changing
28746 the Makefile.am files should be fine.
28747 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
28748 so on. This is more robust against some of the failure modes
28749 associated with running the autotools pieces on their own.
28751 o Minor packaging issues:
28752 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
28753 already created. Patch from Andreas Stieger. Fixes bug 2573.
28755 o Code simplifications and refactoring:
28756 - A major revision to our internal node-selecting and listing logic.
28757 Tor already had at least two major ways to look at the question of
28758 "which Tor servers do we know about": a list of router descriptors,
28759 and a list of entries in the current consensus. With
28760 microdescriptors, we're adding a third. Having so many systems
28761 without an abstraction layer over them was hurting the codebase.
28762 Now, we have a new "node_t" abstraction that presents a consistent
28763 interface to a client's view of a Tor node, and holds (nearly) all
28764 of the mutable state formerly in routerinfo_t and routerstatus_t.
28765 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
28766 no longer link against Libevent: they never used it, but
28767 our library structure used to force them to link it.
28769 o Removed features:
28770 - Remove some old code to work around even older versions of Tor that
28771 used forked processes to handle DNS requests. Such versions of Tor
28772 are no longer in use as servers.
28774 o Documentation fixes:
28775 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
28776 - Add missing documentation for the authority-related torrc options
28777 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
28781 Changes in version 0.2.2.25-alpha - 2011-04-29
28782 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
28783 robust, routers no longer overreport their bandwidth, Win7 should crash
28784 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
28785 now prevents hidden service-related activity from being linkable. It
28786 provides more information to Vidalia so you can see if your bridge is
28787 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
28788 StrictNodes configuration options to make them more reliable, more
28789 understandable, and more regularly applied. If you use those options,
28790 please see the revised documentation for them in the manual page.
28793 - Relays were publishing grossly inflated bandwidth values because
28794 they were writing their state files wrong--now they write the
28795 correct value. Also, resume reading bandwidth history from the
28796 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
28797 - Improve hidden service robustness: When we find that we have
28798 extended a hidden service's introduction circuit to a relay not
28799 listed as an introduction point in the HS descriptor we currently
28800 have, retry with an introduction point from the current
28801 descriptor. Previously we would just give up. Fixes bugs 1024 and
28802 1930; bugfix on 0.2.0.10-alpha.
28803 - Clients now stop trying to use an exit node associated with a given
28804 destination by TrackHostExits if they fail to reach that exit node.
28805 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
28806 - Fix crash bug on platforms where gmtime and localtime can return
28807 NULL. Windows 7 users were running into this one. Fixes part of bug
28808 2077. Bugfix on all versions of Tor. Found by boboper.
28810 o Security and stability fixes:
28811 - Don't double-free a parsable, but invalid, microdescriptor, even if
28812 it is followed in the blob we're parsing by an unparsable
28813 microdescriptor. Fixes an issue reported in a comment on bug 2954.
28814 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
28815 - If the Nickname configuration option isn't given, Tor would pick a
28816 nickname based on the local hostname as the nickname for a relay.
28817 Because nicknames are not very important in today's Tor and the
28818 "Unnamed" nickname has been implemented, this is now problematic
28819 behavior: It leaks information about the hostname without being
28820 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
28821 introduced the Unnamed nickname. Reported by tagnaq.
28822 - Fix an uncommon assertion failure when running with DNSPort under
28823 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28824 - Avoid linkability based on cached hidden service descriptors: forget
28825 all hidden service descriptors cached as a client when processing a
28826 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28829 - Export GeoIP information on bridge usage to controllers even if we
28830 have not yet been running for 24 hours. Now Vidalia bridge operators
28831 can get more accurate and immediate feedback about their
28832 contributions to the network.
28834 o Major features and bugfixes (node selection):
28835 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
28836 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
28837 options. Previously, we had been ambiguous in describing what
28838 counted as an "exit" node, and what operations exactly "StrictNodes
28839 0" would permit. This created confusion when people saw nodes built
28840 through unexpected circuits, and made it hard to tell real bugs from
28841 surprises. Now the intended behavior is:
28842 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
28843 a node that delivers user traffic outside the Tor network.
28844 . "Entry", in the context of EntryNodes, means a node used as the
28845 first hop of a multihop circuit. It doesn't include direct
28846 connections to directory servers.
28847 . "ExcludeNodes" applies to all nodes.
28848 . "StrictNodes" changes the behavior of ExcludeNodes only. When
28849 StrictNodes is set, Tor should avoid all nodes listed in
28850 ExcludeNodes, even when it will make user requests fail. When
28851 StrictNodes is *not* set, then Tor should follow ExcludeNodes
28852 whenever it can, except when it must use an excluded node to
28853 perform self-tests, connect to a hidden service, provide a
28854 hidden service, fulfill a .exit request, upload directory
28855 information, or fetch directory information.
28856 Collectively, the changes to implement the behavior fix bug 1090.
28857 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
28858 a node is listed in both, it's treated as excluded.
28859 - ExcludeNodes now applies to directory nodes -- as a preference if
28860 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
28861 Don't exclude all the directory authorities and set StrictNodes to 1
28862 unless you really want your Tor to break.
28863 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
28864 - ExcludeExitNodes now overrides .exit requests.
28865 - We don't use bridges listed in ExcludeNodes.
28866 - When StrictNodes is 1:
28867 . We now apply ExcludeNodes to hidden service introduction points
28868 and to rendezvous points selected by hidden service users. This
28869 can make your hidden service less reliable: use it with caution!
28870 . If we have used ExcludeNodes on ourself, do not try relay
28871 reachability self-tests.
28872 . If we have excluded all the directory authorities, we will not
28873 even try to upload our descriptor if we're a relay.
28874 . Do not honor .exit requests to an excluded node.
28875 - Remove a misfeature that caused us to ignore the Fast/Stable flags
28876 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
28877 - When the set of permitted nodes changes, we now remove any mappings
28878 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
28880 - We never cannibalize a circuit that had excluded nodes on it, even
28881 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
28882 - Revert a change where we would be laxer about attaching streams to
28883 circuits than when building the circuits. This was meant to prevent
28884 a set of bugs where streams were never attachable, but our improved
28885 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
28886 - Keep track of how many times we launch a new circuit to handle a
28887 given stream. Too many launches could indicate an inconsistency
28888 between our "launch a circuit to handle this stream" logic and our
28889 "attach this stream to one of the available circuits" logic.
28890 - Improve log messages related to excluded nodes.
28893 - Fix a spurious warning when moving from a short month to a long
28894 month on relays with month-based BandwidthAccounting. Bugfix on
28895 0.2.2.17-alpha; fixes bug 3020.
28896 - When a client finds that an origin circuit has run out of 16-bit
28897 stream IDs, we now mark it as unusable for new streams. Previously,
28898 we would try to close the entire circuit. Bugfix on 0.0.6.
28899 - Add a forgotten cast that caused a compile warning on OS X 10.6.
28900 Bugfix on 0.2.2.24-alpha.
28901 - Be more careful about reporting the correct error from a failed
28902 connect() system call. Under some circumstances, it was possible to
28903 look at an incorrect value for errno when sending the end reason.
28904 Bugfix on 0.1.0.1-rc.
28905 - Correctly handle an "impossible" overflow cases in connection byte
28906 counting, where we write or read more than 4GB on an edge connection
28907 in a single second. Bugfix on 0.1.2.8-beta.
28908 - Correct the warning displayed when a rendezvous descriptor exceeds
28909 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28911 - Clients and hidden services now use HSDir-flagged relays for hidden
28912 service descriptor downloads and uploads even if the relays have no
28913 DirPort set and the client has disabled TunnelDirConns. This will
28914 eventually allow us to give the HSDir flag to relays with no
28915 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
28916 - Downgrade "no current certificates known for authority" message from
28917 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
28918 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
28919 2917. Bugfix on 0.1.1.1-alpha.
28920 - Only limit the lengths of single HS descriptors, even when multiple
28921 HS descriptors are published to an HSDir relay in a single POST
28922 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
28923 - Write the current time into the LastWritten line in our state file,
28924 rather than the time from the previous write attempt. Also, stop
28925 trying to use a time of -1 in our log statements. Fixes bug 3039;
28926 bugfix on 0.2.2.14-alpha.
28927 - Be more consistent in our treatment of file system paths. "~" should
28928 get expanded to the user's home directory in the Log config option.
28929 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
28930 feature for the -f and --DataDirectory options.
28933 - Make sure every relay writes a state file at least every 12 hours.
28934 Previously, a relay could go for weeks without writing its state
28935 file, and on a crash could lose its bandwidth history, capacity
28936 estimates, client country statistics, and so on. Addresses bug 3012.
28937 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
28938 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
28939 clients are already deprecated because of security bugs.
28940 - Don't allow v0 hidden service authorities to act as clients.
28941 Required by fix for bug 3000.
28942 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
28943 by fix for bug 3000.
28944 - Ensure that no empty [dirreq-](read|write)-history lines are added
28945 to an extrainfo document. Implements ticket 2497.
28947 o Code simplification and refactoring:
28948 - Remove workaround code to handle directory responses from servers
28949 that had bug 539 (they would send HTTP status 503 responses _and_
28950 send a body too). Since only server versions before
28951 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
28952 keep the workaround in place.
28953 - Remove the old 'fuzzy time' logic. It was supposed to be used for
28954 handling calculations where we have a known amount of clock skew and
28955 an allowed amount of unknown skew. But we only used it in three
28956 places, and we never adjusted the known/unknown skew values. This is
28957 still something we might want to do someday, but if we do, we'll
28958 want to do it differently.
28959 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
28960 None of the cases where we did this before were wrong, but by making
28961 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
28962 - Use GetTempDir to find the proper temporary directory location on
28963 Windows when generating temporary files for the unit tests. Patch by
28967 Changes in version 0.2.2.24-alpha - 2011-04-08
28968 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
28969 prevented Tor clients from effectively using "multihomed" bridges,
28970 that is, bridges that listen on multiple ports or IP addresses so users
28971 can continue to use some of their addresses even if others get blocked.
28974 - Fix a bug where bridge users who configure the non-canonical
28975 address of a bridge automatically switch to its canonical
28976 address. If a bridge listens at more than one address, it should be
28977 able to advertise those addresses independently and any non-blocked
28978 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
28980 - If you configured Tor to use bridge A, and then quit and
28981 configured Tor to use bridge B instead, it would happily continue
28982 to use bridge A if it's still reachable. While this behavior is
28983 a feature if your goal is connectivity, in some scenarios it's a
28984 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
28985 - Directory authorities now use data collected from their own
28986 uptime observations when choosing whether to assign the HSDir flag
28987 to relays, instead of trusting the uptime value the relay reports in
28988 its descriptor. This change helps prevent an attack where a small
28989 set of nodes with frequently-changing identity keys can blackhole
28990 a hidden service. (Only authorities need upgrade; others will be
28991 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
28994 - When we restart our relay, we might get a successful connection
28995 from the outside before we've started our reachability tests,
28996 triggering a warning: "ORPort found reachable, but I have no
28997 routerinfo yet. Failing to inform controller of success." This
28998 bug was harmless unless Tor is running under a controller
28999 like Vidalia, in which case the controller would never get a
29000 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
29002 - Make directory authorities more accurate at recording when
29003 relays that have failed several reachability tests became
29004 unreachable, so we can provide more accuracy at assigning Stable,
29005 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
29006 - Fix an issue that prevented static linking of libevent on
29007 some platforms (notably Linux). Fixes bug 2698; bugfix on
29008 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
29009 the --with-static-libevent configure option).
29010 - We now ask the other side of a stream (the client or the exit)
29011 for more data on that stream when the amount of queued data on
29012 that stream dips low enough. Previously, we wouldn't ask the
29013 other side for more data until either it sent us more data (which
29014 it wasn't supposed to do if it had exhausted its window!) or we
29015 had completely flushed all our queued data. This flow control fix
29016 should improve throughput. Fixes bug 2756; bugfix on the earliest
29017 released versions of Tor (svn commit r152).
29018 - Avoid a double-mark-for-free warning when failing to attach a
29019 transparent proxy connection. (We thought we had fixed this in
29020 0.2.2.23-alpha, but it turns out our fix was checking the wrong
29021 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
29022 bug) and 0.2.2.23-alpha (the incorrect fix).
29023 - When warning about missing zlib development packages during compile,
29024 give the correct package names. Bugfix on 0.2.0.1-alpha.
29027 - Directory authorities now log the source of a rejected POSTed v3
29028 networkstatus vote.
29029 - Make compilation with clang possible when using
29030 --enable-gcc-warnings by removing two warning options that clang
29031 hasn't implemented yet and by fixing a few warnings. Implements
29033 - When expiring circuits, use microsecond timers rather than
29034 one-second timers. This can avoid an unpleasant situation where a
29035 circuit is launched near the end of one second and expired right
29036 near the beginning of the next, and prevent fluctuations in circuit
29038 - Use computed circuit-build timeouts to decide when to launch
29039 parallel introduction circuits for hidden services. (Previously,
29040 we would retry after 15 seconds.)
29041 - Update to the April 1 2011 Maxmind GeoLite Country database.
29044 - Create the /var/run/tor directory on startup on OpenSUSE if it is
29045 not already created. Patch from Andreas Stieger. Fixes bug 2573.
29047 o Documentation changes:
29048 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
29049 - Resolve all doxygen warnings except those for missing documentation.
29051 - Add doxygen documentation for more functions, fields, and types.
29054 Changes in version 0.2.2.23-alpha - 2011-03-08
29055 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
29056 they restart they don't lose their bandwidth capacity estimate. This
29057 release also fixes a diverse set of user-facing bugs, ranging from
29058 relays overrunning their rate limiting to clients falsely warning about
29059 clock skew to bridge descriptor leaks by our bridge directory authority.
29062 - Stop sending a CLOCK_SKEW controller status event whenever
29063 we fetch directory information from a relay that has a wrong clock.
29064 Instead, only inform the controller when it's a trusted authority
29065 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29066 the rest of bug 1074.
29067 - Fix an assert in parsing router descriptors containing IPv6
29068 addresses. This one took down the directory authorities when
29069 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
29070 - Make the bridge directory authority refuse to answer directory
29071 requests for "all" descriptors. It used to include bridge
29072 descriptors in its answer, which was a major information leak.
29073 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
29074 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29075 Tor would ignore their RelayBandwidthBurst setting,
29076 potentially using more bandwidth than expected. Bugfix on
29077 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29078 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29079 hidserv" in her torrc. The 'hidserv' argument never controlled
29080 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29083 - Relays now save observed peak bandwidth throughput rates to their
29084 state file (along with total usage, which was already saved)
29085 so that they can determine their correct estimated bandwidth on
29086 restart. Resolves bug 1863, where Tor relays would reset their
29087 estimated bandwidth to 0 after restarting.
29088 - Directory authorities now take changes in router IP address and
29089 ORPort into account when determining router stability. Previously,
29090 if a router changed its IP or ORPort, the authorities would not
29091 treat it as having any downtime for the purposes of stability
29092 calculation, whereas clients would experience downtime since the
29093 change could take a while to propagate to them. Resolves issue 1035.
29094 - Enable Address Space Layout Randomization (ASLR) and Data Execution
29095 Prevention (DEP) by default on Windows to make it harder for
29096 attackers to exploit vulnerabilities. Patch from John Brooks.
29098 o Minor bugfixes (on 0.2.1.x and earlier):
29099 - Fix a rare crash bug that could occur when a client was configured
29100 with a large number of bridges. Fixes bug 2629; bugfix on
29101 0.2.1.2-alpha. Bugfix by trac user "shitlei".
29102 - Avoid a double mark-for-free warning when failing to attach a
29103 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
29105 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
29106 found by "cypherpunks". This bug was introduced before the first
29107 Tor release, in svn commit r110.
29108 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
29109 don't mention them in the manpage. Fixes bug 2450; issue
29110 spotted by keb and G-Lo.
29111 - Fix a bug in bandwidth history state parsing that could have been
29112 triggered if a future version of Tor ever changed the timing
29113 granularity at which bandwidth history is measured. Bugfix on
29114 Tor 0.1.1.11-alpha.
29115 - When a relay decides that its DNS is too broken for it to serve
29116 as an exit server, it advertised itself as a non-exit, but
29117 continued to act as an exit. This could create accidental
29118 partitioning opportunities for users. Instead, if a relay is
29119 going to advertise reject *:* as its exit policy, it should
29120 really act with exit policy "reject *:*". Fixes bug 2366.
29121 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
29122 - In the special case where you configure a public exit relay as your
29123 bridge, Tor would be willing to use that exit relay as the last
29124 hop in your circuit as well. Now we fail that circuit instead.
29125 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
29126 - Fix a bug with our locking implementation on Windows that couldn't
29127 correctly detect when a file was already locked. Fixes bug 2504,
29128 bugfix on 0.2.1.6-alpha.
29129 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
29130 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
29132 - Set target port in get_interface_address6() correctly. Bugfix
29133 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
29134 - Directory authorities are now more robust to hops back in time
29135 when calculating router stability. Previously, if a run of uptime
29136 or downtime appeared to be negative, the calculation could give
29137 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
29139 - Fix an assert that got triggered when using the TestingTorNetwork
29140 configuration option and then issuing a GETINFO config-text control
29141 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
29143 o Minor bugfixes (on 0.2.2.x):
29144 - Clients should not weight BadExit nodes as Exits in their node
29145 selection. Similarly, directory authorities should not count BadExit
29146 bandwidth as Exit bandwidth when computing bandwidth-weights.
29147 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
29148 - Correctly clear our dir_read/dir_write history when there is an
29149 error parsing any bw history value from the state file. Bugfix on
29150 Tor 0.2.2.15-alpha.
29151 - Resolve a bug in verifying signatures of directory objects
29152 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
29153 Fixes bug 2409. Found by "piebeer".
29154 - Bridge authorities no longer crash on SIGHUP when they try to
29155 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
29159 - Log less aggressively about circuit timeout changes, and improve
29160 some other circuit timeout messages. Resolves bug 2004.
29161 - Log a little more clearly about the times at which we're no longer
29162 accepting new connections. Resolves bug 2181.
29163 - Reject attempts at the client side to open connections to private
29164 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
29165 a randomly chosen exit node. Attempts to do so are always
29166 ill-defined, generally prevented by exit policies, and usually
29167 in error. This will also help to detect loops in transparent
29168 proxy configurations. You can disable this feature by setting
29169 "ClientRejectInternalAddresses 0" in your torrc.
29170 - Always treat failure to allocate an RSA key as an unrecoverable
29172 - Update to the March 1 2011 Maxmind GeoLite Country database.
29174 o Minor features (log subsystem):
29175 - Add documentation for configuring logging at different severities in
29176 different log domains. We've had this feature since 0.2.1.1-alpha,
29177 but for some reason it never made it into the manpage. Fixes
29179 - Make it simpler to specify "All log domains except for A and B".
29180 Previously you needed to say "[*,~A,~B]". Now you can just say
29182 - Add a "LogMessageDomains 1" option to include the domains of log
29183 messages along with the messages. Without this, there's no way
29184 to use log domains without reading the source or doing a lot
29187 o Packaging changes:
29188 - Stop shipping the Tor specs files and development proposal documents
29189 in the tarball. They are now in a separate git repository at
29190 git://git.torproject.org/torspec.git
29193 Changes in version 0.2.1.30 - 2011-02-23
29194 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
29195 change is a slight tweak to Tor's TLS handshake that makes relays
29196 and bridges that run this new version reachable from Iran again.
29197 We don't expect this tweak will win the arms race long-term, but it
29198 buys us time until we roll out a better solution.
29201 - Stop sending a CLOCK_SKEW controller status event whenever
29202 we fetch directory information from a relay that has a wrong clock.
29203 Instead, only inform the controller when it's a trusted authority
29204 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
29205 the rest of bug 1074.
29206 - Fix a bounds-checking error that could allow an attacker to
29207 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29208 Found by "piebeer".
29209 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
29210 Tor would ignore their RelayBandwidthBurst setting,
29211 potentially using more bandwidth than expected. Bugfix on
29212 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
29213 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
29214 hidserv" in her torrc. The 'hidserv' argument never controlled
29215 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
29218 - Adjust our TLS Diffie-Hellman parameters to match those used by
29220 - Update to the February 1 2011 Maxmind GeoLite Country database.
29223 - Check for and reject overly long directory certificates and
29224 directory tokens before they have a chance to hit any assertions.
29225 Bugfix on 0.2.1.28. Found by "doorss".
29226 - Bring the logic that gathers routerinfos and assesses the
29227 acceptability of circuits into line. This prevents a Tor OP from
29228 getting locked in a cycle of choosing its local OR as an exit for a
29229 path (due to a .exit request) and then rejecting the circuit because
29230 its OR is not listed yet. It also prevents Tor clients from using an
29231 OR running in the same instance as an exit (due to a .exit request)
29232 if the OR does not meet the same requirements expected of an OR
29233 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29235 o Packaging changes:
29236 - Stop shipping the Tor specs files and development proposal documents
29237 in the tarball. They are now in a separate git repository at
29238 git://git.torproject.org/torspec.git
29239 - Do not include Git version tags as though they are SVN tags when
29240 generating a tarball from inside a repository that has switched
29241 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29244 Changes in version 0.2.2.22-alpha - 2011-01-25
29245 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29246 main other change is a slight tweak to Tor's TLS handshake that makes
29247 relays and bridges that run this new version reachable from Iran again.
29248 We don't expect this tweak will win the arms race long-term, but it
29249 will buy us a bit more time until we roll out a better solution.
29252 - Fix a bounds-checking error that could allow an attacker to
29253 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29254 Found by "piebeer".
29255 - Don't assert when changing from bridge to relay or vice versa
29256 via the controller. The assert happened because we didn't properly
29257 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29258 bug 2433. Reported by bastik.
29261 - Adjust our TLS Diffie-Hellman parameters to match those used by
29263 - Provide a log message stating which geoip file we're parsing
29264 instead of just stating that we're parsing the geoip file.
29265 Implements ticket 2432.
29268 - Check for and reject overly long directory certificates and
29269 directory tokens before they have a chance to hit any assertions.
29270 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29273 Changes in version 0.2.2.21-alpha - 2011-01-15
29274 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29275 continues our recent code security audit work. The main fix resolves
29276 a remote heap overflow vulnerability that can allow remote code
29277 execution (CVE-2011-0427). Other fixes address a variety of assert
29278 and crash bugs, most of which we think are hard to exploit remotely.
29280 o Major bugfixes (security), also included in 0.2.1.29:
29281 - Fix a heap overflow bug where an adversary could cause heap
29282 corruption. This bug probably allows remote code execution
29283 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29285 - Prevent a denial-of-service attack by disallowing any
29286 zlib-compressed data whose compression factor is implausibly
29287 high. Fixes part of bug 2324; reported by "doorss".
29288 - Zero out a few more keys in memory before freeing them. Fixes
29289 bug 2384 and part of bug 2385. These key instances found by
29290 "cypherpunks", based on Andrew Case's report about being able
29291 to find sensitive data in Tor's memory space if you have enough
29292 permissions. Bugfix on 0.0.2pre9.
29294 o Major bugfixes (crashes), also included in 0.2.1.29:
29295 - Prevent calls to Libevent from inside Libevent log handlers.
29296 This had potential to cause a nasty set of crashes, especially
29297 if running Libevent with debug logging enabled, and running
29298 Tor with a controller watching for low-severity log messages.
29299 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29300 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29301 underflow errors there too. Fixes the other part of bug 2324.
29302 - Fix a bug where we would assert if we ever had a
29303 cached-descriptors.new file (or another file read directly into
29304 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29305 on 0.2.1.25. Found by doorss.
29306 - Fix some potential asserts and parsing issues with grossly
29307 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29310 o Minor bugfixes (other), also included in 0.2.1.29:
29311 - Fix a bug with handling misformed replies to reverse DNS lookup
29312 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29313 bug reported by doorss.
29314 - Fix compilation on mingw when a pthreads compatibility library
29315 has been installed. (We don't want to use it, so we shouldn't
29316 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29317 - Fix a bug where we would declare that we had run out of virtual
29318 addresses when the address space was only half-exhausted. Bugfix
29320 - Correctly handle the case where AutomapHostsOnResolve is set but
29321 no virtual addresses are available. Fixes bug 2328; bugfix on
29322 0.1.2.1-alpha. Bug found by doorss.
29323 - Correctly handle wrapping around when we run out of virtual
29324 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29326 o Minor features, also included in 0.2.1.29:
29327 - Update to the January 1 2011 Maxmind GeoLite Country database.
29328 - Introduce output size checks on all of our decryption functions.
29330 o Build changes, also included in 0.2.1.29:
29331 - Tor does not build packages correctly with Automake 1.6 and earlier;
29332 added a check to Makefile.am to make sure that we're building with
29333 Automake 1.7 or later.
29334 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29335 because we built it with a too-old version of automake. Thus that
29336 release broke ./configure --enable-openbsd-malloc, which is popular
29337 among really fast exit relays on Linux.
29339 o Major bugfixes, new in 0.2.2.21-alpha:
29340 - Prevent crash/heap corruption when the cbtnummodes consensus
29341 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29344 o Major features, new in 0.2.2.21-alpha:
29345 - Introduce minimum/maximum values that clients will believe
29346 from the consensus. Now we'll have a better chance to avoid crashes
29347 or worse when a consensus param has a weird value.
29349 o Minor features, new in 0.2.2.21-alpha:
29350 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29351 used on bridges, and it makes bridge scanning somewhat easier.
29352 - If writing the state file to disk fails, wait up to an hour before
29353 retrying again, rather than trying again each second. Fixes bug
29354 2346; bugfix on Tor 0.1.1.3-alpha.
29355 - Make Libevent log messages get delivered to controllers later,
29356 and not from inside the Libevent log handler. This prevents unsafe
29357 reentrant Libevent calls while still letting the log messages
29359 - Detect platforms that brokenly use a signed size_t, and refuse to
29360 build there. Found and analyzed by doorss and rransom.
29361 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29364 o Minor bugfixes, new in 0.2.2.21-alpha:
29365 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29366 than waiting forever for them to finish. Fixes bug 2330; bugfix
29367 on 0.2.0.16-alpha. Found by doorss.
29368 - Add assertions to check for overflow in arguments to
29369 base32_encode() and base32_decode(); fix a signed-unsigned
29370 comparison there too. These bugs are not actually reachable in Tor,
29371 but it's good to prevent future errors too. Found by doorss.
29372 - Correctly detect failures to create DNS requests when using Libevent
29373 versions before v2. (Before Libevent 2, we used our own evdns
29374 implementation. Its return values for Libevent's evdns_resolve_*()
29375 functions are not consistent with those from Libevent.) Fixes bug
29376 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29378 o Documentation, new in 0.2.2.21-alpha:
29379 - Document the default socks host and port (127.0.0.1:9050) for
29383 Changes in version 0.2.1.29 - 2011-01-15
29384 Tor 0.2.1.29 continues our recent code security audit work. The main
29385 fix resolves a remote heap overflow vulnerability that can allow remote
29386 code execution. Other fixes address a variety of assert and crash bugs,
29387 most of which we think are hard to exploit remotely.
29389 o Major bugfixes (security):
29390 - Fix a heap overflow bug where an adversary could cause heap
29391 corruption. This bug probably allows remote code execution
29392 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29394 - Prevent a denial-of-service attack by disallowing any
29395 zlib-compressed data whose compression factor is implausibly
29396 high. Fixes part of bug 2324; reported by "doorss".
29397 - Zero out a few more keys in memory before freeing them. Fixes
29398 bug 2384 and part of bug 2385. These key instances found by
29399 "cypherpunks", based on Andrew Case's report about being able
29400 to find sensitive data in Tor's memory space if you have enough
29401 permissions. Bugfix on 0.0.2pre9.
29403 o Major bugfixes (crashes):
29404 - Prevent calls to Libevent from inside Libevent log handlers.
29405 This had potential to cause a nasty set of crashes, especially
29406 if running Libevent with debug logging enabled, and running
29407 Tor with a controller watching for low-severity log messages.
29408 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29409 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29410 underflow errors there too. Fixes the other part of bug 2324.
29411 - Fix a bug where we would assert if we ever had a
29412 cached-descriptors.new file (or another file read directly into
29413 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29414 on 0.2.1.25. Found by doorss.
29415 - Fix some potential asserts and parsing issues with grossly
29416 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29419 o Minor bugfixes (other):
29420 - Fix a bug with handling misformed replies to reverse DNS lookup
29421 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29422 bug reported by doorss.
29423 - Fix compilation on mingw when a pthreads compatibility library
29424 has been installed. (We don't want to use it, so we shouldn't
29425 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29426 - Fix a bug where we would declare that we had run out of virtual
29427 addresses when the address space was only half-exhausted. Bugfix
29429 - Correctly handle the case where AutomapHostsOnResolve is set but
29430 no virtual addresses are available. Fixes bug 2328; bugfix on
29431 0.1.2.1-alpha. Bug found by doorss.
29432 - Correctly handle wrapping around to when we run out of virtual
29433 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29434 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29435 because we built it with a too-old version of automake. Thus that
29436 release broke ./configure --enable-openbsd-malloc, which is popular
29437 among really fast exit relays on Linux.
29440 - Update to the January 1 2011 Maxmind GeoLite Country database.
29441 - Introduce output size checks on all of our decryption functions.
29444 - Tor does not build packages correctly with Automake 1.6 and earlier;
29445 added a check to Makefile.am to make sure that we're building with
29446 Automake 1.7 or later.
29449 Changes in version 0.2.2.20-alpha - 2010-12-17
29450 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
29451 exploitable bugs. We also fix a variety of other significant bugs,
29452 change the IP address for one of our directory authorities, and update
29453 the minimum version that Tor relays must run to join the network.
29456 - Fix a remotely exploitable bug that could be used to crash instances
29457 of Tor remotely by overflowing on the heap. Remote-code execution
29458 hasn't been confirmed, but can't be ruled out. Everyone should
29459 upgrade. Bugfix on the 0.1.1 series and later.
29460 - Fix a bug that could break accounting on 64-bit systems with large
29461 time_t values, making them hibernate for impossibly long intervals.
29462 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
29463 - Fix a logic error in directory_fetches_from_authorities() that
29464 would cause all _non_-exits refusing single-hop-like circuits
29465 to fetch from authorities, when we wanted to have _exits_ fetch
29466 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
29468 - Fix a stream fairness bug that would cause newer streams on a given
29469 circuit to get preference when reading bytes from the origin or
29470 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
29471 introduced before the first Tor release, in svn revision r152.
29473 o Directory authority changes:
29474 - Change IP address and ports for gabelmoo (v3 directory authority).
29477 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
29478 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
29479 - Fix an off-by-one error in calculating some controller command
29480 argument lengths. Fortunately, this mistake is harmless since
29481 the controller code does redundant NUL termination too. Found by
29482 boboper. Bugfix on 0.1.1.1-alpha.
29483 - Do not dereference NULL if a bridge fails to build its
29484 extra-info descriptor. Found by an anonymous commenter on
29485 Trac. Bugfix on 0.2.2.19-alpha.
29488 - Update to the December 1 2010 Maxmind GeoLite Country database.
29489 - Directory authorities now reject relays running any versions of
29490 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
29491 known bugs that keep RELAY_EARLY cells from working on rendezvous
29492 circuits. Followup to fix for bug 2081.
29493 - Directory authorities now reject relays running any version of Tor
29494 older than 0.2.0.26-rc. That version is the earliest that fetches
29495 current directory information correctly. Fixes bug 2156.
29496 - Report only the top 10 ports in exit-port stats in order not to
29497 exceed the maximum extra-info descriptor length of 50 KB. Implements
29501 Changes in version 0.2.1.28 - 2010-12-17
29502 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
29503 exploitable bugs. We also took this opportunity to change the IP address
29504 for one of our directory authorities, and to update the geoip database
29508 - Fix a remotely exploitable bug that could be used to crash instances
29509 of Tor remotely by overflowing on the heap. Remote-code execution
29510 hasn't been confirmed, but can't be ruled out. Everyone should
29511 upgrade. Bugfix on the 0.1.1 series and later.
29513 o Directory authority changes:
29514 - Change IP address and ports for gabelmoo (v3 directory authority).
29517 - Update to the December 1 2010 Maxmind GeoLite Country database.
29520 Changes in version 0.2.1.27 - 2010-11-23
29521 Yet another OpenSSL security patch broke its compatibility with Tor:
29522 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
29523 also took this opportunity to fix several crash bugs, integrate a new
29524 directory authority, and update the bundled GeoIP database.
29527 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29528 No longer set the tlsext_host_name extension on server SSL objects;
29529 but continue to set it on client SSL objects. Our goal in setting
29530 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29531 bugfix on 0.2.1.1-alpha.
29532 - Do not log messages to the controller while shrinking buffer
29533 freelists. Doing so would sometimes make the controller connection
29534 try to allocate a buffer chunk, which would mess up the internals
29535 of the freelist and cause an assertion failure. Fixes bug 1125;
29536 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29537 - Learn our external IP address when we're a relay or bridge, even if
29538 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29539 where we introduced bridge relays that don't need to publish to
29540 be useful. Fixes bug 2050.
29541 - Do even more to reject (and not just ignore) annotations on
29542 router descriptors received anywhere but from the cache. Previously
29543 we would ignore such annotations at first, but cache them to disk
29544 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29545 - When you're using bridges and your network goes away and your
29546 bridges get marked as down, recover when you attempt a new socks
29547 connection (if the network is back), rather than waiting up to an
29548 hour to try fetching new descriptors for your bridges. Bugfix on
29549 0.2.0.3-alpha; fixes bug 1981.
29552 - Move to the November 2010 Maxmind GeoLite country db (rather
29553 than the June 2009 ip-to-country GeoIP db) for our statistics that
29554 count how many users relays are seeing from each country. Now we'll
29555 have more accurate data, especially for many African countries.
29557 o New directory authorities:
29558 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29562 - Fix an assertion failure that could occur in directory caches or
29563 bridge users when using a very short voting interval on a testing
29564 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29566 - Enforce multiplicity rules when parsing annotations. Bugfix on
29567 0.2.0.8-alpha. Found by piebeer.
29568 - Allow handshaking OR connections to take a full KeepalivePeriod
29569 seconds to handshake. Previously, we would close them after
29570 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29571 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29573 - When building with --enable-gcc-warnings on OpenBSD, disable
29574 warnings in system headers. This makes --enable-gcc-warnings
29575 pass on OpenBSD 4.8.
29578 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29579 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29580 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29581 Servers can start sending this code when enough clients recognize
29582 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
29583 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29584 Patch from mingw-san.
29587 - Remove the old debian/ directory from the main Tor distribution.
29588 The official Tor-for-debian git repository lives at the URL
29589 https://git.torproject.org/debian/tor.git
29590 - Stop shipping the old doc/website/ directory in the tarball. We
29591 changed the website format in late 2010, and what we shipped in
29592 0.2.1.26 really wasn't that useful anyway.
29595 Changes in version 0.2.2.19-alpha - 2010-11-22
29596 Yet another OpenSSL security patch broke its compatibility with Tor:
29597 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
29600 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29601 No longer set the tlsext_host_name extension on server SSL objects;
29602 but continue to set it on client SSL objects. Our goal in setting
29603 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29604 bugfix on 0.2.1.1-alpha.
29607 - Try harder not to exceed the maximum length of 50 KB when writing
29608 statistics to extra-info descriptors. This bug was triggered by very
29609 fast relays reporting exit-port, entry, and dirreq statistics.
29610 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
29611 - Publish a router descriptor even if generating an extra-info
29612 descriptor fails. Previously we would not publish a router
29613 descriptor without an extra-info descriptor; this can cause fast
29614 exit relays collecting exit-port statistics to drop from the
29615 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
29618 Changes in version 0.2.2.18-alpha - 2010-11-16
29619 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
29620 us lately, makes unpublished bridge relays able to detect their IP
29621 address, and fixes a wide variety of other bugs to get us much closer
29622 to a stable release.
29625 - Do even more to reject (and not just ignore) annotations on
29626 router descriptors received anywhere but from the cache. Previously
29627 we would ignore such annotations at first, but cache them to disk
29628 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29629 - Do not log messages to the controller while shrinking buffer
29630 freelists. Doing so would sometimes make the controller connection
29631 try to allocate a buffer chunk, which would mess up the internals
29632 of the freelist and cause an assertion failure. Fixes bug 1125;
29633 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29634 - Learn our external IP address when we're a relay or bridge, even if
29635 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29636 where we introduced bridge relays that don't need to publish to
29637 be useful. Fixes bug 2050.
29638 - Maintain separate TLS contexts and certificates for incoming and
29639 outgoing connections in bridge relays. Previously we would use the
29640 same TLS contexts and certs for incoming and outgoing connections.
29641 Bugfix on 0.2.0.3-alpha; addresses bug 988.
29642 - Maintain separate identity keys for incoming and outgoing TLS
29643 contexts in bridge relays. Previously we would use the same
29644 identity keys for incoming and outgoing TLS contexts. Bugfix on
29645 0.2.0.3-alpha; addresses the other half of bug 988.
29646 - Avoid an assertion failure when we as an authority receive a
29647 duplicate upload of a router descriptor that we already have,
29648 but which we previously considered an obsolete descriptor.
29649 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
29650 - Avoid a crash bug triggered by looking at a dangling pointer while
29651 setting the network status consensus. Found by Robert Ransom.
29652 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
29653 - Fix a logic error where servers that _didn't_ act as exits would
29654 try to keep their server lists more aggressively up to date than
29655 exits, when it was supposed to be the other way around. Bugfix
29658 o Minor bugfixes (on Tor 0.2.1.x and earlier):
29659 - When we're trying to guess whether we know our IP address as
29660 a relay, we would log various ways that we failed to guess
29661 our address, but never log that we ended up guessing it
29662 successfully. Now add a log line to help confused and anxious
29663 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
29664 - Bring the logic that gathers routerinfos and assesses the
29665 acceptability of circuits into line. This prevents a Tor OP from
29666 getting locked in a cycle of choosing its local OR as an exit for a
29667 path (due to a .exit request) and then rejecting the circuit because
29668 its OR is not listed yet. It also prevents Tor clients from using an
29669 OR running in the same instance as an exit (due to a .exit request)
29670 if the OR does not meet the same requirements expected of an OR
29671 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29672 - Correctly describe errors that occur when generating a TLS object.
29673 Previously we would attribute them to a failure while generating a
29674 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
29676 - Enforce multiplicity rules when parsing annotations. Bugfix on
29677 0.2.0.8-alpha. Found by piebeer.
29678 - Fix warnings that newer versions of autoconf produced during
29679 ./autogen.sh. These warnings appear to be harmless in our case,
29680 but they were extremely verbose. Fixes bug 2020.
29682 o Minor bugfixes (on Tor 0.2.2.x):
29683 - Enable protection of small arrays whenever we build with gcc
29684 hardening features, not only when also building with warnings
29685 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
29688 - Make hidden services work better in private Tor networks by not
29689 requiring any uptime to join the hidden service descriptor
29690 DHT. Implements ticket 2088.
29691 - Rate-limit the "your application is giving Tor only an IP address"
29692 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
29693 - When AllowSingleHopExits is set, print a warning to explain to the
29694 relay operator why most clients are avoiding her relay.
29695 - Update to the November 1 2010 Maxmind GeoLite Country database.
29697 o Code simplifications and refactoring:
29698 - When we fixed bug 1038 we had to put in a restriction not to send
29699 RELAY_EARLY cells on rend circuits. This was necessary as long
29700 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
29701 active. Now remove this obsolete check. Resolves bug 2081.
29702 - Some options used different conventions for uppercasing of acronyms
29703 when comparing manpage and source. Fix those in favor of the
29704 manpage, as it makes sense to capitalize acronyms.
29705 - Remove the torrc.complete file. It hasn't been kept up to date
29706 and users will have better luck checking out the manpage.
29707 - Remove the obsolete "NoPublish" option; it has been flagged
29708 as obsolete and has produced a warning since 0.1.1.18-rc.
29709 - Remove everything related to building the expert bundle for OS X.
29710 It has confused many users, doesn't work right on OS X 10.6,
29711 and is hard to get rid of once installed. Resolves bug 1274.
29714 Changes in version 0.2.2.17-alpha - 2010-09-30
29715 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
29716 to use one-hop circuits (which can put the exit relays at higher risk,
29717 plus unbalance the network); fixes a big bug in bandwidth accounting
29718 for relays that want to limit their monthly bandwidth use; fixes a
29719 big pile of bugs in how clients tolerate temporary network failure;
29720 and makes our adaptive circuit build timeout feature (which improves
29721 client performance if your network is fast while not breaking things
29722 if your network is slow) better handle bad networks.
29725 - Exit relays now try harder to block exit attempts from unknown
29726 relays, to make it harder for people to use them as one-hop proxies
29727 a la tortunnel. Controlled by the refuseunknownexits consensus
29728 parameter (currently enabled), or you can override it on your
29729 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
29731 o Major bugfixes (0.2.1.x and earlier):
29732 - Fix a bug in bandwidth accounting that could make us use twice
29733 the intended bandwidth when our interval start changes due to
29734 daylight saving time. Now we tolerate skew in stored vs computed
29735 interval starts: if the start of the period changes by no more than
29736 50% of the period's duration, we remember bytes that we transferred
29737 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
29738 - Always search the Windows system directory for system DLLs, and
29739 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
29740 - When you're using bridges and your network goes away and your
29741 bridges get marked as down, recover when you attempt a new socks
29742 connection (if the network is back), rather than waiting up to an
29743 hour to try fetching new descriptors for your bridges. Bugfix on
29744 0.2.0.3-alpha; fixes bug 1981.
29746 o Major bugfixes (on 0.2.2.x):
29747 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
29749 - Fix a segfault that could happen when operating a bridge relay with
29750 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
29751 - The consensus bandwidth-weights (used by clients to choose fast
29752 relays) entered an unexpected edge case in September where
29753 Exits were much scarcer than Guards, resulting in bad weight
29754 recommendations. Now we compute them using new constraints that
29755 should succeed in all cases. Also alter directory authorities to
29756 not include the bandwidth-weights line if they fail to produce
29757 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
29758 - When weighting bridges during path selection, we used to trust
29759 the bandwidths they provided in their descriptor, only capping them
29760 at 10MB/s. This turned out to be problematic for two reasons:
29761 Bridges could claim to handle a lot more traffic then they
29762 actually would, thus making more clients pick them and have a
29763 pretty effective DoS attack. The other issue is that new bridges
29764 that might not have a good estimate for their bw capacity yet
29765 would not get used at all unless no other bridges are available
29766 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
29768 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
29769 - Ignore cannibalized circuits when recording circuit build times.
29770 This should provide for a minor performance improvement for hidden
29771 service users using 0.2.2.14-alpha, and should remove two spurious
29772 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
29773 - Simplify the logic that causes us to decide if the network is
29774 unavailable for purposes of recording circuit build times. If we
29775 receive no cells whatsoever for the entire duration of a circuit's
29776 full measured lifetime, the network is probably down. Also ignore
29777 one-hop directory fetching circuit timeouts when calculating our
29778 circuit build times. These changes should hopefully reduce the
29779 cases where we see ridiculous circuit build timeouts for people
29780 with spotty wireless connections. Fixes part of bug 1772; bugfix
29782 - Prevent the circuit build timeout from becoming larger than
29783 the maximum build time we have ever seen. Also, prevent the time
29784 period for measurement circuits from becoming larger than twice that
29785 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
29788 - When we run out of directory information such that we can't build
29789 circuits, but then get enough that we can build circuits, log when
29790 we actually construct a circuit, so the user has a better chance of
29791 knowing what's going on. Fixes bug 1362.
29792 - Be more generous with how much bandwidth we'd use up (with
29793 accounting enabled) before entering "soft hibernation". Previously,
29794 we'd refuse new connections and circuits once we'd used up 95% of
29795 our allotment. Now, we use up 95% of our allotment, AND make sure
29796 that we have no more than 500MB (or 3 hours of expected traffic,
29797 whichever is lower) remaining before we enter soft hibernation.
29798 - If we've configured EntryNodes and our network goes away and/or all
29799 our entrynodes get marked down, optimistically retry them all when
29800 a new socks application request appears. Fixes bug 1882.
29801 - Add some more defensive programming for architectures that can't
29802 handle unaligned integer accesses. We don't know of any actual bugs
29803 right now, but that's the best time to fix them. Fixes bug 1943.
29804 - Support line continuations in the torrc config file. If a line
29805 ends with a single backslash character, the newline is ignored, and
29806 the configuration value is treated as continuing on the next line.
29809 o Minor bugfixes (on 0.2.1.x and earlier):
29810 - For bandwidth accounting, calculate our expected bandwidth rate
29811 based on the time during which we were active and not in
29812 soft-hibernation during the last interval. Previously, we were
29813 also considering the time spent in soft-hibernation. If this
29814 was a long time, we would wind up underestimating our bandwidth
29815 by a lot, and skewing our wakeup time towards the start of the
29816 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
29818 o Minor bugfixes (on 0.2.2.x):
29819 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
29820 which were disabled by the circuit build timeout changes in
29821 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
29822 - Make sure we don't warn about missing bandwidth weights when
29823 choosing bridges or other relays not in the consensus. Bugfix on
29824 0.2.2.10-alpha; fixes bug 1805.
29825 - In our logs, do not double-report signatures from unrecognized
29826 authorities both as "from unknown authority" and "not
29827 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
29830 Changes in version 0.2.2.16-alpha - 2010-09-17
29831 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
29832 evident at exit relays), and also continues to resolve all the little
29833 bugs that have been filling up trac lately.
29835 o Major bugfixes (stream-level fairness):
29836 - When receiving a circuit-level SENDME for a blocked circuit, try
29837 to package cells fairly from all the streams that had previously
29838 been blocked on that circuit. Previously, we had started with the
29839 oldest stream, and allowed each stream to potentially exhaust
29840 the circuit's package window. This gave older streams on any
29841 given circuit priority over newer ones. Fixes bug 1937. Detected
29842 originally by Camilo Viecco. This bug was introduced before the
29843 first Tor release, in svn commit r152: it is the new winner of
29844 the longest-lived bug prize.
29845 - When the exit relay got a circuit-level sendme cell, it started
29846 reading on the exit streams, even if had 500 cells queued in the
29847 circuit queue already, so the circuit queue just grew and grew in
29848 some cases. We fix this by not re-enabling reading on receipt of a
29849 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
29850 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
29852 - Newly created streams were allowed to read cells onto circuits,
29853 even if the circuit's cell queue was blocked and waiting to drain.
29854 This created potential unfairness, as older streams would be
29855 blocked, but newer streams would gladly fill the queue completely.
29856 We add code to detect this situation and prevent any stream from
29857 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
29861 - Update to the September 1 2010 Maxmind GeoLite Country database.
29862 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
29863 not. This would lead to a cookie that is still not group readable.
29864 Closes bug 1843. Suggested by katmagic.
29865 - When logging a rate-limited warning, we now mention how many messages
29866 got suppressed since the last warning.
29867 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
29868 do individual connection-level rate limiting of clients. The torrc
29869 config options with the same names trump the consensus params, if
29870 both are present. Replaces the old "bwconnrate" and "bwconnburst"
29871 consensus params which were broken from 0.2.2.7-alpha through
29872 0.2.2.14-alpha. Closes bug 1947.
29873 - When a router changes IP address or port, authorities now launch
29874 a new reachability test for it. Implements ticket 1899.
29875 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
29876 2 no signature, 4 required" messages about consensus signatures
29877 easier to read, and make sure they get logged at the same severity
29878 as the messages explaining which keys are which. Fixes bug 1290.
29879 - Don't warn when we have a consensus that we can't verify because
29880 of missing certificates, unless those certificates are ones
29881 that we have been trying and failing to download. Fixes bug 1145.
29882 - If you configure your bridge with a known identity fingerprint,
29883 and the bridge authority is unreachable (as it is in at least
29884 one country now), fall back to directly requesting the descriptor
29885 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
29887 - When building with --enable-gcc-warnings on OpenBSD, disable
29888 warnings in system headers. This makes --enable-gcc-warnings
29889 pass on OpenBSD 4.8.
29891 o Minor bugfixes (on 0.2.1.x and earlier):
29892 - Authorities will now attempt to download consensuses if their
29893 own efforts to make a live consensus have failed. This change
29894 means authorities that restart will fetch a valid consensus, and
29895 it means authorities that didn't agree with the current consensus
29896 will still fetch and serve it if it has enough signatures. Bugfix
29897 on 0.2.0.9-alpha; fixes bug 1300.
29898 - Ensure DNS requests launched by "RESOLVE" commands from the
29899 controller respect the __LeaveStreamsUnattached setconf options. The
29900 same goes for requests launched via DNSPort or transparent
29901 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
29902 - Allow handshaking OR connections to take a full KeepalivePeriod
29903 seconds to handshake. Previously, we would close them after
29904 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29905 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29907 - Rate-limit "Failed to hand off onionskin" warnings.
29908 - Never relay a cell for a circuit we have already destroyed.
29909 Between marking a circuit as closeable and finally closing it,
29910 it may have been possible for a few queued cells to get relayed,
29911 even though they would have been immediately dropped by the next
29912 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
29913 - Never queue a cell for a circuit that's already been marked
29915 - Never vote for a server as "Running" if we have a descriptor for
29916 it claiming to be hibernating, and that descriptor was published
29917 more recently than our last contact with the server. Bugfix on
29918 0.2.0.3-alpha; fixes bug 911.
29919 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
29922 o Minor bugfixes (on 0.2.2.x):
29923 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
29924 down if a directory fetch fails and you've configured either
29925 bridges or EntryNodes. The intent was to mark the relay as down
29926 _unless_ you're using bridges or EntryNodes, since if you are
29927 then you could quickly run out of entry points.
29928 - Fix the Windows directory-listing code. A bug introduced in
29929 0.2.2.14-alpha could make Windows directory servers forget to load
29930 some of their cached v2 networkstatus files.
29931 - Really allow clients to use relays as bridges. Fixes bug 1776;
29932 bugfix on 0.2.2.15-alpha.
29933 - Demote a warn to info that happens when the CellStatistics option
29934 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
29935 Reported by Moritz Bartl.
29936 - On Windows, build correctly either with or without Unicode support.
29937 This is necessary so that Tor can support fringe platforms like
29938 Windows 98 (which has no Unicode), or Windows CE (which has no
29939 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
29942 - Add a unit test for cross-platform directory-listing code.
29945 Changes in version 0.2.2.15-alpha - 2010-08-18
29946 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
29947 fixes a variety of other bugs that were preventing performance
29948 experiments from moving forward, fixes several bothersome memory leaks,
29949 and generally closes a lot of smaller bugs that have been filling up
29953 - Stop assigning the HSDir flag to relays that disable their
29954 DirPort (and thus will refuse to answer directory requests). This
29955 fix should dramatically improve the reachability of hidden services:
29956 hidden services and hidden service clients pick six HSDir relays
29957 to store and retrieve the hidden service descriptor, and currently
29958 about half of the HSDir relays will refuse to work. Bugfix on
29959 0.2.0.10-alpha; fixes part of bug 1693.
29960 - The PerConnBWRate and Burst config options, along with the
29961 bwconnrate and bwconnburst consensus params, initialized each conn's
29962 token bucket values only when the connection is established. Now we
29963 update them if the config options change, and update them every time
29964 we get a new consensus. Otherwise we can encounter an ugly edge
29965 case where we initialize an OR conn to client-level bandwidth,
29966 but then later the relay joins the consensus and we leave it
29967 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
29968 - Fix a regression that caused Tor to rebind its ports if it receives
29969 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
29972 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
29973 should give us approximately 40-50% more Guard-flagged nodes,
29974 improving the anonymity the Tor network can provide and also
29975 decreasing the dropoff in throughput that relays experience when
29976 they first get the Guard flag.
29977 - Allow enabling or disabling the *Statistics config options while
29981 - Update to the August 1 2010 Maxmind GeoLite Country database.
29982 - Have the controller interface give a more useful message than
29983 "Internal Error" in response to failed GETINFO requests.
29984 - Warn when the same option is provided more than once in a torrc
29985 file, on the command line, or in a single SETCONF statement, and
29986 the option is one that only accepts a single line. Closes bug 1384.
29987 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29988 Patch from mingw-san.
29989 - Add support for the country code "{??}" in torrc options like
29990 ExcludeNodes, to indicate all routers of unknown country. Closes
29992 - Relays report the number of bytes spent on answering directory
29993 requests in extra-info descriptors similar to {read,write}-history.
29994 Implements enhancement 1790.
29996 o Minor bugfixes (on 0.2.1.x and earlier):
29997 - Complain if PublishServerDescriptor is given multiple arguments that
29998 include 0 or 1. This configuration will be rejected in the future.
29999 Bugfix on 0.2.0.1-alpha; closes bug 1107.
30000 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
30001 Bugfix on 0.2.0.13-alpha; closes bug 928.
30002 - Change "Application request when we're believed to be offline."
30003 notice to "Application request when we haven't used client
30004 functionality lately.", to clarify that it's not an error. Bugfix
30005 on 0.0.9.3; fixes bug 1222.
30006 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
30007 would return "551 Internal error" rather than "552 Unrecognized key
30008 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
30009 - Users can't configure a regular relay to be their bridge. It didn't
30010 work because when Tor fetched the bridge descriptor, it found
30011 that it already had it, and didn't realize that the purpose of the
30012 descriptor had changed. Now we replace routers with a purpose other
30013 than bridge with bridge descriptors when fetching them. Bugfix on
30014 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
30015 refetch the descriptor with router purpose 'general', disabling
30017 - Fix a rare bug in rend_fn unit tests: we would fail a test when
30018 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
30019 on 0.2.0.10-alpha; fixes bug 1808.
30020 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
30021 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
30022 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
30023 Servers can start sending this code when enough clients recognize
30024 it. Also update the spec to reflect this new reason. Bugfix on
30025 0.1.0.1-rc; fixes part of bug 1793.
30026 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
30027 when we switch from being a public relay to a bridge. Otherwise
30028 there will still be clients that see the relay in their consensus,
30029 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
30031 - Instead of giving an assertion failure on an internal mismatch
30032 on estimated freelist size, just log a BUG warning and try later.
30033 Mitigates but does not fix bug 1125.
30034 - Fix an assertion failure that could occur in caches or bridge users
30035 when using a very short voting interval on a testing network.
30036 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
30038 o Minor bugfixes (on 0.2.2.x):
30039 - Alter directory authorities to always consider Exit-flagged nodes
30040 as potential Guard nodes in their votes. The actual decision to
30041 use Exits as Guards is done in the consensus bandwidth weights.
30042 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
30043 - When the controller is reporting the purpose of circuits that
30044 didn't finish building before the circuit build timeout, it was
30045 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
30046 - Our libevent version parsing code couldn't handle versions like
30047 1.4.14b-stable and incorrectly warned the user about using an
30048 old and broken version of libevent. Treat 1.4.14b-stable like
30049 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
30051 - Don't use substitution references like $(VAR:MOD) when
30052 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
30053 '$(:x)' to 'x' rather than the empty string. This bites us in
30054 doc/ when configured with --disable-asciidoc. Bugfix on
30055 0.2.2.9-alpha; fixes bug 1773.
30056 - Remove a spurious hidden service server-side log notice about
30057 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
30059 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
30061 - Correctly report written bytes on linked connections. Found while
30062 implementing 1790. Bugfix on 0.2.2.4-alpha.
30063 - Fix three memory leaks: one in circuit_build_times_parse_state(),
30064 one in dirvote_add_signatures_to_pending_consensus(), and one every
30065 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
30066 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
30068 o Code simplifications and refactoring:
30069 - Take a first step towards making or.h smaller by splitting out
30070 function definitions for all source files in src/or/. Leave
30071 structures and defines in or.h for now.
30072 - Remove a bunch of unused function declarations as well as a block of
30073 #if 0'd code from the unit tests. Closes bug 1824.
30074 - New unit tests for exit-port history statistics; refactored exit
30075 statistics code to be more easily tested.
30076 - Remove the old debian/ directory from the main Tor distribution.
30077 The official Tor-for-debian git repository lives at the URL
30078 https://git.torproject.org/debian/tor.git
30081 Changes in version 0.2.2.14-alpha - 2010-07-12
30082 Tor 0.2.2.14-alpha greatly improves client-side handling of
30083 circuit build timeouts, which are used to estimate speed and improve
30084 performance. We also move to a much better GeoIP database, port Tor to
30085 Windows CE, introduce new compile flags that improve code security,
30086 add an eighth v3 directory authority, and address a lot of more
30090 - Tor directory authorities no longer crash when started with a
30091 cached-microdesc-consensus file in their data directory. Bugfix
30092 on 0.2.2.6-alpha; fixes bug 1532.
30093 - Treat an unset $HOME like an empty $HOME rather than triggering an
30094 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
30095 - Ignore negative and large circuit build timeout values that can
30096 happen during a suspend or hibernate. These values caused various
30097 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
30098 - Alter calculation of Pareto distribution parameter 'Xm' for
30099 Circuit Build Timeout learning to use the weighted average of the
30100 top N=3 modes (because we have three entry guards). Considering
30101 multiple modes should improve the timeout calculation in some cases,
30102 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
30104 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
30105 right censored distribution model. This approach improves over the
30106 synthetic timeout generation approach that was producing insanely
30107 high timeout values. Now we calculate build timeouts using truncated
30108 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
30109 - Do not close circuits that are under construction when they reach
30110 the circuit build timeout. Instead, leave them building (but do not
30111 use them) for up until the time corresponding to the 95th percentile
30112 on the Pareto CDF or 60 seconds, whichever is greater. This is done
30113 to provide better data for the new Pareto model. This percentile
30114 can be controlled by the consensus.
30117 - Move to the June 2010 Maxmind GeoLite country db (rather than the
30118 June 2009 ip-to-country GeoIP db) for our statistics that count
30119 how many users relays are seeing from each country. Now we have
30120 more accurate data for many African countries.
30121 - Port Tor to build and run correctly on Windows CE systems, using
30122 the wcecompat library. Contributed by Valerio Lupi.
30123 - New "--enable-gcc-hardening" ./configure flag (off by default)
30124 to turn on gcc compile time hardening options. It ensures
30125 that signed ints have defined behavior (-fwrapv), enables
30126 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
30127 with canaries (-fstack-protector-all), turns on ASLR protection if
30128 supported by the kernel (-fPIE, -pie), and adds additional security
30129 related warnings. Verified to work on Mac OS X and Debian Lenny.
30130 - New "--enable-linker-hardening" ./configure flag (off by default)
30131 to turn on ELF specific hardening features (relro, now). This does
30132 not work with Mac OS X or any other non-ELF binary format.
30134 o New directory authorities:
30135 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
30139 - New config option "WarnUnsafeSocks 0" disables the warning that
30140 occurs whenever Tor receives a socks handshake using a version of
30141 the socks protocol that can only provide an IP address (rather
30142 than a hostname). Setups that do DNS locally over Tor are fine,
30143 and we shouldn't spam the logs in that case.
30144 - Convert the HACKING file to asciidoc, and add a few new sections
30145 to it, explaining how we use Git, how we make changelogs, and
30146 what should go in a patch.
30147 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
30148 event, to give information on the current rate of circuit timeouts
30149 over our stored history.
30150 - Add ability to disable circuit build time learning via consensus
30151 parameter and via a LearnCircuitBuildTimeout config option. Also
30152 automatically disable circuit build time calculation if we are
30153 either a AuthoritativeDirectory, or if we fail to write our state
30154 file. Fixes bug 1296.
30155 - More gracefully handle corrupt state files, removing asserts
30156 in favor of saving a backup and resetting state.
30157 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
30161 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
30163 - When a2x fails, mention that the user could disable manpages instead
30164 of trying to fix their asciidoc installation.
30165 - Where available, use Libevent 2.0's periodic timers so that our
30166 once-per-second cleanup code gets called even more closely to
30167 once per second than it would otherwise. Fixes bug 943.
30168 - If you run a bridge that listens on multiple IP addresses, and
30169 some user configures a bridge address that uses a different IP
30170 address than your bridge writes in its router descriptor, and the
30171 user doesn't specify an identity key, their Tor would discard the
30172 descriptor because "it isn't one of our configured bridges", and
30173 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
30174 Bugfix on 0.2.0.3-alpha.
30175 - If OpenSSL fails to make a duplicate of a private or public key, log
30176 an error message and try to exit cleanly. May help with debugging
30177 if bug 1209 ever remanifests.
30178 - Save a couple bytes in memory allocation every time we escape
30179 certain characters in a string. Patch from Florian Zumbiehl.
30180 - Make it explicit that we don't cannibalize one-hop circuits. This
30181 happens in the wild, but doesn't turn out to be a problem because
30182 we fortunately don't use those circuits. Many thanks to outofwords
30183 for the initial analysis and to swissknife who confirmed that
30184 two-hop circuits are actually created.
30185 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
30186 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
30187 - Eliminate a case where a circuit build time warning was displayed
30188 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
30191 Changes in version 0.2.1.26 - 2010-05-02
30192 Tor 0.2.1.26 addresses the recent connection and memory overload
30193 problems we've been seeing on relays, especially relays with their
30194 DirPort open. If your relay has been crashing, or you turned it off
30195 because it used too many resources, give this release a try.
30197 This release also fixes yet another instance of broken OpenSSL libraries
30198 that was causing some relays to drop out of the consensus.
30201 - Teach relays to defend themselves from connection overload. Relays
30202 now close idle circuits early if it looks like they were intended
30203 for directory fetches. Relays are also more aggressive about closing
30204 TLS connections that have no circuits on them. Such circuits are
30205 unlikely to be re-used, and tens of thousands of them were piling
30206 up at the fast relays, causing the relays to run out of sockets
30207 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30208 their directory fetches over TLS).
30209 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30210 that claim to be earlier than 0.9.8m, but which have in reality
30211 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30212 behavior. Possible fix for some cases of bug 1346.
30213 - Directory mirrors were fetching relay descriptors only from v2
30214 directory authorities, rather than v3 authorities like they should.
30215 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30216 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30219 - Finally get rid of the deprecated and now harmful notion of "clique
30220 mode", where directory authorities maintain TLS connections to
30224 - In the util/threads test, no longer free the test_mutex before all
30225 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30226 - The master thread could starve the worker threads quite badly on
30227 certain systems, causing them to run only partially in the allowed
30228 window. This resulted in test failures. Now the master thread sleeps
30229 occasionally for a few microseconds while the two worker-threads
30230 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30233 Changes in version 0.2.2.13-alpha - 2010-04-24
30234 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30235 problems we've been seeing on relays, especially relays with their
30236 DirPort open. If your relay has been crashing, or you turned it off
30237 because it used too many resources, give this release a try.
30240 - Teach relays to defend themselves from connection overload. Relays
30241 now close idle circuits early if it looks like they were intended
30242 for directory fetches. Relays are also more aggressive about closing
30243 TLS connections that have no circuits on them. Such circuits are
30244 unlikely to be re-used, and tens of thousands of them were piling
30245 up at the fast relays, causing the relays to run out of sockets
30246 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30247 their directory fetches over TLS).
30250 - Finally get rid of the deprecated and now harmful notion of "clique
30251 mode", where directory authorities maintain TLS connections to
30253 - Directory authorities now do an immediate reachability check as soon
30254 as they hear about a new relay. This change should slightly reduce
30255 the time between setting up a relay and getting listed as running
30256 in the consensus. It should also improve the time between setting
30257 up a bridge and seeing use by bridge users.
30258 - Directory authorities no longer launch a TLS connection to every
30259 relay as they startup. Now that we have 2k+ descriptors cached,
30260 the resulting network hiccup is becoming a burden. Besides,
30261 authorities already avoid voting about Running for the first half
30262 hour of their uptime.
30265 Changes in version 0.2.2.12-alpha - 2010-04-20
30266 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30267 handle and vote on descriptors. It was causing relays to drop out of
30271 - Many relays have been falling out of the consensus lately because
30272 not enough authorities know about their descriptor for them to get
30273 a majority of votes. When we deprecated the v2 directory protocol,
30274 we got rid of the only way that v3 authorities can hear from each
30275 other about other descriptors. Now authorities examine every v3
30276 vote for new descriptors, and fetch them from that authority. Bugfix
30278 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30279 and a warning in or.h related to bandwidth_weight_rule_t that
30280 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30282 - Fix a segfault on relays when DirReqStatistics is enabled
30283 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30287 - Demote a confusing TLS warning that relay operators might get when
30288 someone tries to talk to their OrPort. It is neither the operator's
30289 fault nor can they do anything about it. Fixes bug 1364; bugfix
30293 Changes in version 0.2.2.11-alpha - 2010-04-15
30294 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30295 libraries that was causing some relays to drop out of the consensus.
30298 - Directory mirrors were fetching relay descriptors only from v2
30299 directory authorities, rather than v3 authorities like they should.
30300 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30301 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30302 - Fix a parsing error that made every possible value of
30303 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30304 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30305 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30306 about the option without breaking older ones.
30307 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30308 that claim to be earlier than 0.9.8m, but which have in reality
30309 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30310 behavior. Possible fix for some cases of bug 1346.
30313 - Experiment with a more aggressive approach to preventing clients
30314 from making one-hop exit streams. Exit relays who want to try it
30315 out can set "RefuseUnknownExits 1" in their torrc, and then look
30316 for "Attempt by %s to open a stream" log messages. Let us know
30318 - Add support for statically linking zlib by specifying
30319 --enable-static-zlib, to go with our support for statically linking
30320 openssl and libevent. Resolves bug 1358.
30323 - Fix a segfault that happens whenever a Tor client that is using
30324 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30326 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30327 out the first line. Fixes bug 1295.
30328 - When building the manpage from a tarball, we required asciidoc, but
30329 the asciidoc -> roff/html conversion was already done for the
30330 tarball. Make 'make' complain only when we need asciidoc (either
30331 because we're compiling directly from git, or because we altered
30332 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30333 - When none of the directory authorities vote on any params, Tor
30334 segfaulted when trying to make the consensus from the votes. We
30335 didn't trigger the bug in practice, because authorities do include
30336 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30339 - In the util/threads test, no longer free the test_mutex before all
30340 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30341 - The master thread could starve the worker threads quite badly on
30342 certain systems, causing them to run only partially in the allowed
30343 window. This resulted in test failures. Now the master thread sleeps
30344 occasionally for a few microseconds while the two worker-threads
30345 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30348 Changes in version 0.2.2.10-alpha - 2010-03-07
30349 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30350 could prevent relays from guessing their IP address correctly. It also
30351 starts the groundwork for another client-side performance boost, since
30352 currently we're not making efficient use of relays that have both the
30353 Guard flag and the Exit flag.
30356 - Fix a regression from our patch for bug 1244 that caused relays
30357 to guess their IP address incorrectly if they didn't set Address
30358 in their torrc and/or their address fails to resolve. Bugfix on
30359 0.2.2.9-alpha; fixes bug 1269.
30361 o Major features (performance):
30362 - Directory authorities now compute consensus weightings that instruct
30363 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30364 and no flag. Clients that use these weightings will distribute
30365 network load more evenly across these different relay types. The
30366 weightings are in the consensus so we can change them globally in
30367 the future. Extra thanks to "outofwords" for finding some nasty
30368 security bugs in the first implementation of this feature.
30370 o Minor features (performance):
30371 - Always perform router selections using weighted relay bandwidth,
30372 even if we don't need a high capacity circuit at the time. Non-fast
30373 circuits now only differ from fast ones in that they can use relays
30374 not marked with the Fast flag. This "feature" could turn out to
30375 be a horrible bug; we should investigate more before it goes into
30379 - Allow disabling building of the manpages. Skipping the manpage
30380 speeds up the build considerably.
30382 o Minor bugfixes (on 0.2.2.x):
30383 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30384 Bugfix on 0.2.2.9-alpha.
30385 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30386 config option. Bugfix on 0.2.2.7-alpha.
30387 - Ship the asciidoc-helper file in the tarball, so that people can
30388 build from source if they want to, and touching the .1.txt files
30389 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30391 o Minor bugfixes (on 0.2.1.x or earlier):
30392 - Fix a dereference-then-NULL-check sequence when publishing
30393 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30395 - Fix another dereference-then-NULL-check sequence. Bugfix on
30396 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30397 - Make sure we treat potentially not NUL-terminated strings correctly.
30398 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30400 o Code simplifications and refactoring:
30401 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30402 compliant. Based on a patch from Christian Kujau.
30403 - Don't use sed in asciidoc-helper anymore.
30404 - Make the build process fail if asciidoc cannot be found and
30405 building with asciidoc isn't disabled.
30408 Changes in version 0.2.2.9-alpha - 2010-02-22
30409 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30410 location of a directory authority, and cleans up a bunch of small bugs.
30412 o Directory authority changes:
30413 - Change IP address for dannenberg (v3 directory authority), and
30414 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30415 service directory authority) from the list.
30418 - Make Tor work again on the latest OS X: when deciding whether to
30419 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30420 version at run-time, not compile time. We need to do this because
30421 Apple doesn't update its dev-tools headers when it updates its
30422 libraries in a security patch.
30423 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30424 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30425 a memory leak when requesting a hidden service descriptor we've
30426 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30428 - Authorities could be tricked into giving out the Exit flag to relays
30429 that didn't allow exiting to any ports. This bug could screw
30430 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30431 1238. Bug discovered by Martin Kowalczyk.
30432 - When freeing a session key, zero it out completely. We only zeroed
30433 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30434 patched by ekir. Fixes bug 1254.
30437 - Fix static compilation by listing the openssl libraries in the right
30438 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30439 - Resume handling .exit hostnames in a special way: originally we
30440 stripped the .exit part and used the requested exit relay. In
30441 0.2.2.1-alpha we stopped treating them in any special way, meaning
30442 if you use a .exit address then Tor will pass it on to the exit
30443 relay. Now we reject the .exit stream outright, since that behavior
30444 might be more expected by the user. Found and diagnosed by Scott
30445 Bennett and Downie on or-talk.
30446 - Don't spam the controller with events when we have no file
30447 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
30448 for log messages was already solved from bug 748.)
30449 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
30451 - Make the DNSPort option work with libevent 2.x. Don't alter the
30452 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
30453 - Emit a GUARD DROPPED controller event for a case we missed.
30454 - Make more fields in the controller protocol case-insensitive, since
30455 control-spec.txt said they were.
30456 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30457 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30458 - Fix a spec conformance issue: the network-status-version token
30459 must be the first token in a v3 consensus or vote. Discovered by
30460 parakeep. Bugfix on 0.2.0.3-alpha.
30462 o Code simplifications and refactoring:
30463 - Generate our manpage and HTML documentation using Asciidoc. This
30464 change should make it easier to maintain the documentation, and
30465 produce nicer HTML.
30466 - Remove the --enable-iphone option. According to reports from Marco
30467 Bonetti, Tor builds fine without any special tweaking on recent
30468 iPhone SDK versions.
30469 - Removed some unnecessary files from the source distribution. The
30470 AUTHORS file has now been merged into the people page on the
30471 website. The roadmaps and design doc can now be found in the
30472 projects directory in svn.
30473 - Enabled various circuit build timeout constants to be controlled
30474 by consensus parameters. Also set better defaults for these
30475 parameters based on experimentation on broadband and simulated
30476 high latency links.
30479 - The 'EXTENDCIRCUIT' control port command can now be used with
30480 a circ id of 0 and no path. This feature will cause Tor to build
30481 a new 'fast' general purpose circuit using its own path selection
30483 - Added a BUILDTIMEOUT_SET controller event to describe changes
30484 to the circuit build timeout.
30485 - Future-proof the controller protocol a bit by ignoring keyword
30486 arguments we do not recognize.
30487 - Expand homedirs passed to tor-checkkey. This should silence a
30488 coverity complaint about passing a user-supplied string into
30489 open() without checking it.
30492 Changes in version 0.2.1.25 - 2010-03-16
30493 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
30494 prevent relays from guessing their IP address correctly. It also fixes
30495 several minor potential security bugs.
30498 - Fix a regression from our patch for bug 1244 that caused relays
30499 to guess their IP address incorrectly if they didn't set Address
30500 in their torrc and/or their address fails to resolve. Bugfix on
30501 0.2.1.23; fixes bug 1269.
30502 - When freeing a session key, zero it out completely. We only zeroed
30503 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30504 patched by ekir. Fixes bug 1254.
30507 - Fix a dereference-then-NULL-check sequence when publishing
30508 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30510 - Fix another dereference-then-NULL-check sequence. Bugfix on
30511 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30512 - Make sure we treat potentially not NUL-terminated strings correctly.
30513 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30517 Changes in version 0.2.1.24 - 2010-02-21
30518 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
30522 - Work correctly out-of-the-box with even more vendor-patched versions
30523 of OpenSSL. In particular, make it so Debian and OS X don't need
30524 customized patches to run/build.
30527 Changes in version 0.2.1.23 - 2010-02-13
30528 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
30529 again on the latest OS X, and updates the location of a directory
30532 o Major bugfixes (performance):
30533 - We were selecting our guards uniformly at random, and then weighting
30534 which of our guards we'd use uniformly at random. This imbalance
30535 meant that Tor clients were severely limited on throughput (and
30536 probably latency too) by the first hop in their circuit. Now we
30537 select guards weighted by currently advertised bandwidth. We also
30538 automatically discard guards picked using the old algorithm. Fixes
30539 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30542 - Make Tor work again on the latest OS X: when deciding whether to
30543 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30544 version at run-time, not compile time. We need to do this because
30545 Apple doesn't update its dev-tools headers when it updates its
30546 libraries in a security patch.
30547 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30548 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30549 a memory leak when requesting a hidden service descriptor we've
30550 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30553 o Directory authority changes:
30554 - Change IP address for dannenberg (v3 directory authority), and
30555 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30556 service directory authority) from the list.
30559 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30560 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30563 - Avoid a mad rush at the beginning of each month when each client
30564 rotates half of its guards. Instead we spread the rotation out
30565 throughout the month, but we still avoid leaving a precise timestamp
30566 in the state file about when we first picked the guard. Improves
30567 over the behavior introduced in 0.1.2.17.
30570 Changes in version 0.2.2.8-alpha - 2010-01-26
30571 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30572 causing bridge relays to disappear. If you're running a bridge,
30576 - Fix a memory corruption bug on bridges that occurred during the
30577 inclusion of stats data in extra-info descriptors. Also fix the
30578 interface for geoip_get_bridge_stats* to prevent similar bugs in
30579 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
30580 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
30583 - Ignore OutboundBindAddress when connecting to localhost.
30584 Connections to localhost need to come _from_ localhost, or else
30585 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
30589 Changes in version 0.2.2.7-alpha - 2010-01-19
30590 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
30591 as laying the groundwork for further relay-side performance fixes. It
30592 also starts cleaning up client behavior with respect to the EntryNodes,
30593 ExitNodes, and StrictNodes config options.
30595 This release also rotates two directory authority keys, due to a
30596 security breach of some of the Torproject servers.
30598 o Directory authority changes:
30599 - Rotate keys (both v3 identity and relay identity) for moria1
30602 o Major features (performance):
30603 - We were selecting our guards uniformly at random, and then weighting
30604 which of our guards we'd use uniformly at random. This imbalance
30605 meant that Tor clients were severely limited on throughput (and
30606 probably latency too) by the first hop in their circuit. Now we
30607 select guards weighted by currently advertised bandwidth. We also
30608 automatically discard guards picked using the old algorithm. Fixes
30609 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30610 - When choosing which cells to relay first, relays can now favor
30611 circuits that have been quiet recently, to provide lower latency
30612 for low-volume circuits. By default, relays enable or disable this
30613 feature based on a setting in the consensus. You can override
30614 this default by using the new "CircuitPriorityHalflife" config
30615 option. Design and code by Ian Goldberg, Can Tang, and Chris
30617 - Add separate per-conn write limiting to go with the per-conn read
30618 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
30619 but never per-conn write limits.
30620 - New consensus params "bwconnrate" and "bwconnburst" to let us
30621 rate-limit client connections as they enter the network. It's
30622 controlled in the consensus so we can turn it on and off for
30623 experiments. It's starting out off. Based on proposal 163.
30625 o Major features (relay selection options):
30626 - Switch to a StrictNodes config option, rather than the previous
30627 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
30628 "StrictExcludeNodes" option.
30629 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
30630 change during a config reload, mark and discard all our origin
30631 circuits. This fix should address edge cases where we change the
30632 config options and but then choose a circuit that we created before
30634 - If EntryNodes or ExitNodes are set, be more willing to use an
30635 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
30637 - Make EntryNodes config option much more aggressive even when
30638 StrictNodes is not set. Before it would prepend your requested
30639 entrynodes to your list of guard nodes, but feel free to use others
30640 after that. Now it chooses only from your EntryNodes if any of
30641 those are available, and only falls back to others if a) they're
30642 all down and b) StrictNodes is not set.
30643 - Now we refresh your entry guards from EntryNodes at each consensus
30644 fetch -- rather than just at startup and then they slowly rot as
30645 the network changes.
30648 - Stop bridge directory authorities from answering dbg-stability.txt
30649 directory queries, which would let people fetch a list of all
30650 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30653 - Log a notice when we get a new control connection. Now it's easier
30654 for security-conscious users to recognize when a local application
30655 is knocking on their controller door. Suggested by bug 1196.
30656 - New config option "CircuitStreamTimeout" to override our internal
30657 timeout schedule for how many seconds until we detach a stream from
30658 a circuit and try a new circuit. If your network is particularly
30659 slow, you might want to set this to a number like 60.
30660 - New controller command "getinfo config-text". It returns the
30661 contents that Tor would write if you send it a SAVECONF command,
30662 so the controller can write the file to disk itself.
30663 - New options for SafeLogging to allow scrubbing only log messages
30664 generated while acting as a relay.
30665 - Ship the bridges spec file in the tarball too.
30666 - Avoid a mad rush at the beginning of each month when each client
30667 rotates half of its guards. Instead we spread the rotation out
30668 throughout the month, but we still avoid leaving a precise timestamp
30669 in the state file about when we first picked the guard. Improves
30670 over the behavior introduced in 0.1.2.17.
30672 o Minor bugfixes (compiling):
30673 - Fix compilation on OS X 10.3, which has a stub mlockall() but
30674 hides it. Bugfix on 0.2.2.6-alpha.
30675 - Fix compilation on Solaris by removing support for the
30676 DisableAllSwap config option. Solaris doesn't have an rlimit for
30677 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
30680 o Minor bugfixes (crashes):
30681 - Do not segfault when writing buffer stats when we haven't observed
30682 a single circuit to report about. Found by Fabian Lanze. Bugfix on
30684 - If we're in the pathological case where there's no exit bandwidth
30685 but there is non-exit bandwidth, or no guard bandwidth but there
30686 is non-guard bandwidth, don't crash during path selection. Bugfix
30688 - Fix an impossible-to-actually-trigger buffer overflow in relay
30689 descriptor generation. Bugfix on 0.1.0.15.
30691 o Minor bugfixes (privacy):
30692 - Fix an instance where a Tor directory mirror might accidentally
30693 log the IP address of a misbehaving Tor client. Bugfix on
30695 - Don't list Windows capabilities in relay descriptors. We never made
30696 use of them, and maybe it's a bad idea to publish them. Bugfix
30699 o Minor bugfixes (other):
30700 - Resolve an edge case in path weighting that could make us misweight
30701 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
30702 - Fix statistics on client numbers by country as seen by bridges that
30703 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
30704 intervals instead of variable 12-to-48-hour intervals.
30705 - After we free an internal connection structure, overwrite it
30706 with a different memory value than we use for overwriting a freed
30707 internal circuit structure. Should help with debugging. Suggested
30709 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
30712 o Removed features:
30713 - Remove the HSAuthorityRecordStats option that version 0 hidden
30714 service authorities could have used to track statistics of overall
30715 hidden service usage.
30718 Changes in version 0.2.1.22 - 2010-01-19
30719 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
30720 authorities -- it would tell you its whole history of bridge descriptors
30721 if you make the right directory request. This stable update also
30722 rotates two of the seven v3 directory authority keys and locations.
30724 o Directory authority changes:
30725 - Rotate keys (both v3 identity and relay identity) for moria1
30729 - Stop bridge directory authorities from answering dbg-stability.txt
30730 directory queries, which would let people fetch a list of all
30731 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30734 Changes in version 0.2.1.21 - 2009-12-21
30735 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
30736 library. If you use Tor on Linux / Unix and you're getting SSL
30737 renegotiation errors, upgrading should help. We also recommend an
30738 upgrade if you're an exit relay.
30741 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30742 handshake from working unless we explicitly tell OpenSSL that we
30743 are using SSL renegotiation safely. We are, of course, but OpenSSL
30744 0.9.8l won't work unless we say we are.
30745 - Avoid crashing if the client is trying to upload many bytes and the
30746 circuit gets torn down at the same time, or if the flip side
30747 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
30750 - Do not refuse to learn about authority certs and v2 networkstatus
30751 documents that are older than the latest consensus. This bug might
30752 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30753 Spotted and fixed by xmux.
30754 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
30755 trigger platform-specific option misparsing case found by Coverity
30757 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
30758 trigger assert. Fixes bug 1173.
30761 Changes in version 0.2.2.6-alpha - 2009-11-19
30762 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
30763 support for the new lower-footprint "microdescriptor" directory design,
30764 future-proofing our consensus format against new hash functions or
30765 other changes, and an Android port. It also makes Tor compatible with
30766 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
30769 - Directory authorities can now create, vote on, and serve multiple
30770 parallel formats of directory data as part of their voting process.
30771 Partially implements Proposal 162: "Publish the consensus in
30773 - Directory authorities can now agree on and publish small summaries
30774 of router information that clients can use in place of regular
30775 server descriptors. This transition will eventually allow clients
30776 to use far less bandwidth for downloading information about the
30777 network. Begins the implementation of Proposal 158: "Clients
30778 download consensus + microdescriptors".
30779 - The directory voting system is now extensible to use multiple hash
30780 algorithms for signatures and resource selection. Newer formats
30781 are signed with SHA256, with a possibility for moving to a better
30782 hash algorithm in the future.
30783 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
30784 current and future memory pages via mlockall(). On supported
30785 platforms (modern Linux and probably BSD but not Windows or OS X),
30786 this should effectively disable any and all attempts to page out
30787 memory. This option requires that you start your Tor as root --
30788 if you use DisableAllSwap, please consider using the User option
30789 to properly reduce the privileges of your Tor.
30790 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
30791 to help Tor build correctly for Android phones.
30794 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30795 handshake from working unless we explicitly tell OpenSSL that we
30796 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
30797 won't work unless we say we are.
30800 - Fix a crash bug when trying to initialize the evdns module in
30801 Libevent 2. Bugfix on 0.2.1.16-rc.
30802 - Stop logging at severity 'warn' when some other Tor client tries
30803 to establish a circuit with us using weak DH keys. It's a protocol
30804 violation, but that doesn't mean ordinary users need to hear about
30805 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
30806 - Do not refuse to learn about authority certs and v2 networkstatus
30807 documents that are older than the latest consensus. This bug might
30808 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30809 Spotted and fixed by xmux.
30810 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
30811 - If all authorities restart at once right before a consensus vote,
30812 nobody will vote about "Running", and clients will get a consensus
30813 with no usable relays. Instead, authorities refuse to build a
30814 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
30815 - If your relay can't keep up with the number of incoming create
30816 cells, it would log one warning per failure into your logs. Limit
30817 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
30818 - Bridges now use "reject *:*" as their default exit policy. Bugfix
30819 on 0.2.0.3-alpha; fixes bug 1113.
30820 - Fix a memory leak on directory authorities during voting that was
30821 introduced in 0.2.2.1-alpha. Found via valgrind.
30824 Changes in version 0.2.1.20 - 2009-10-15
30825 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
30826 services at once, prepares for more performance improvements, and
30827 fixes a bunch of smaller bugs.
30829 The Windows and OS X bundles also include a more recent Vidalia,
30830 and switch from Privoxy to Polipo.
30832 The OS X installers are now drag and drop. It's best to un-install
30833 Tor/Vidalia and then install this new bundle, rather than upgrade. If
30834 you want to upgrade, you'll need to update the paths for Tor and Polipo
30835 in the Vidalia Settings window.
30838 - Send circuit or stream sendme cells when our window has decreased
30839 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30840 by Karsten when testing the "reduce circuit window" performance
30841 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30842 before the release of Tor 0.0.0. This is the new winner of the
30844 - Fix a remotely triggerable memory leak when a consensus document
30845 contains more than one signature from the same voter. Bugfix on
30847 - Avoid segfault in rare cases when finishing an introduction circuit
30848 as a client and finding out that we don't have an introduction key
30849 for it. Fixes bug 1073. Reported by Aaron Swartz.
30852 - Tor now reads the "circwindow" parameter out of the consensus,
30853 and uses that value for its circuit package window rather than the
30854 default of 1000 cells. Begins the implementation of proposal 168.
30856 o New directory authorities:
30857 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30859 - Move moria1 and tonga to alternate IP addresses.
30862 - Fix a signed/unsigned compile warning in 0.2.1.19.
30863 - Fix possible segmentation fault on directory authorities. Bugfix on
30865 - Fix an extremely rare infinite recursion bug that could occur if
30866 we tried to log a message after shutting down the log subsystem.
30867 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30868 - Fix an obscure bug where hidden services on 64-bit big-endian
30869 systems might mis-read the timestamp in v3 introduce cells, and
30870 refuse to connect back to the client. Discovered by "rotor".
30871 Bugfix on 0.2.1.6-alpha.
30872 - We were triggering a CLOCK_SKEW controller status event whenever
30873 we connect via the v2 connection protocol to any relay that has
30874 a wrong clock. Instead, we should only inform the controller when
30875 it's a trusted authority that claims our clock is wrong. Bugfix
30876 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30877 - We were telling the controller about CHECKING_REACHABILITY and
30878 REACHABILITY_FAILED status events whenever we launch a testing
30879 circuit or notice that one has failed. Instead, only tell the
30880 controller when we want to inform the user of overall success or
30881 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30883 - Don't warn when we're using a circuit that ends with a node
30884 excluded in ExcludeExitNodes, but the circuit is not used to access
30885 the outside world. This should help fix bug 1090. Bugfix on
30887 - Work around a small memory leak in some versions of OpenSSL that
30888 stopped the memory used by the hostname TLS extension from being
30892 - Add a "getinfo status/accepted-server-descriptor" controller
30893 command, which is the recommended way for controllers to learn
30894 whether our server descriptor has been successfully received by at
30895 least on directory authority. Un-recommend good-server-descriptor
30896 getinfo and status events until we have a better design for them.
30899 Changes in version 0.2.2.5-alpha - 2009-10-11
30900 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
30903 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
30905 o Directory authorities:
30906 - Temporarily (just for this release) move dizum to an alternate
30910 Changes in version 0.2.2.4-alpha - 2009-10-10
30911 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
30912 introduces a new unit test framework, shifts directry authority
30913 addresses around to reduce the impact from recent blocking events,
30914 and fixes a few smaller bugs.
30917 - Fix several more asserts in the circuit_build_times code, for
30918 example one that causes Tor to fail to start once we have
30919 accumulated 5000 build times in the state file. Bugfixes on
30920 0.2.2.2-alpha; fixes bug 1108.
30922 o New directory authorities:
30923 - Move moria1 and Tonga to alternate IP addresses.
30926 - Log SSL state transitions at debug level during handshake, and
30927 include SSL states in error messages. This may help debug future
30928 SSL handshake issues.
30929 - Add a new "Handshake" log domain for activities that happen
30930 during the TLS handshake.
30931 - Revert to the "June 3 2009" ip-to-country file. The September one
30932 seems to have removed most US IP addresses.
30933 - Directory authorities now reject Tor relays with versions less than
30934 0.1.2.14. This step cuts out four relays from the current network,
30935 none of which are very big.
30938 - Fix a couple of smaller issues with gathering statistics. Bugfixes
30940 - Fix two memory leaks in the error case of
30941 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
30942 - Don't count one-hop circuits when we're estimating how long it
30943 takes circuits to build on average. Otherwise we'll set our circuit
30944 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
30945 - Directory authorities no longer change their opinion of, or vote on,
30946 whether a router is Running, unless they have themselves been
30947 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
30950 o Code simplifications and refactoring:
30951 - Revise our unit tests to use the "tinytest" framework, so we
30952 can run tests in their own processes, have smarter setup/teardown
30953 code, and so on. The unit test code has moved to its own
30954 subdirectory, and has been split into multiple modules.
30957 Changes in version 0.2.2.3-alpha - 2009-09-23
30958 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
30961 - Fix an overzealous assert in our new circuit build timeout code.
30962 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
30965 - If the networkstatus consensus tells us that we should use a
30966 negative circuit package window, ignore it. Otherwise we'll
30967 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
30970 Changes in version 0.2.2.2-alpha - 2009-09-21
30971 Tor 0.2.2.2-alpha introduces our latest performance improvement for
30972 clients: Tor tracks the average time it takes to build a circuit, and
30973 avoids using circuits that take too long to build. For fast connections,
30974 this feature can cut your expected latency in half. For slow or flaky
30975 connections, it could ruin your Tor experience. Let us know if it does!
30978 - Tor now tracks how long it takes to build client-side circuits
30979 over time, and adapts its timeout to local network performance.
30980 Since a circuit that takes a long time to build will also provide
30981 bad performance, we get significant latency improvements by
30982 discarding the slowest 20% of circuits. Specifically, Tor creates
30983 circuits more aggressively than usual until it has enough data
30984 points for a good timeout estimate. Implements proposal 151.
30985 We are especially looking for reports (good and bad) from users with
30986 both EDGE and broadband connections that can move from broadband
30987 to EDGE and find out if the build-time data in the .tor/state gets
30988 reset without loss of Tor usability. You should also see a notice
30989 log message telling you that Tor has reset its timeout.
30990 - Directory authorities can now vote on arbitrary integer values as
30991 part of the consensus process. This is designed to help set
30992 network-wide parameters. Implements proposal 167.
30993 - Tor now reads the "circwindow" parameter out of the consensus,
30994 and uses that value for its circuit package window rather than the
30995 default of 1000 cells. Begins the implementation of proposal 168.
30998 - Fix a remotely triggerable memory leak when a consensus document
30999 contains more than one signature from the same voter. Bugfix on
31003 - Fix an extremely rare infinite recursion bug that could occur if
31004 we tried to log a message after shutting down the log subsystem.
31005 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
31006 - Fix parsing for memory or time units given without a space between
31007 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
31008 - A networkstatus vote must contain exactly one signature. Spec
31009 conformance issue. Bugfix on 0.2.0.3-alpha.
31010 - Fix an obscure bug where hidden services on 64-bit big-endian
31011 systems might mis-read the timestamp in v3 introduce cells, and
31012 refuse to connect back to the client. Discovered by "rotor".
31013 Bugfix on 0.2.1.6-alpha.
31014 - We were triggering a CLOCK_SKEW controller status event whenever
31015 we connect via the v2 connection protocol to any relay that has
31016 a wrong clock. Instead, we should only inform the controller when
31017 it's a trusted authority that claims our clock is wrong. Bugfix
31018 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
31019 - We were telling the controller about CHECKING_REACHABILITY and
31020 REACHABILITY_FAILED status events whenever we launch a testing
31021 circuit or notice that one has failed. Instead, only tell the
31022 controller when we want to inform the user of overall success or
31023 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
31025 - Don't warn when we're using a circuit that ends with a node
31026 excluded in ExcludeExitNodes, but the circuit is not used to access
31027 the outside world. This should help fix bug 1090, but more problems
31028 remain. Bugfix on 0.2.1.6-alpha.
31029 - Work around a small memory leak in some versions of OpenSSL that
31030 stopped the memory used by the hostname TLS extension from being
31032 - Make our 'torify' script more portable; if we have only one of
31033 'torsocks' or 'tsocks' installed, don't complain to the user;
31034 and explain our warning about tsocks better.
31037 - Add a "getinfo status/accepted-server-descriptor" controller
31038 command, which is the recommended way for controllers to learn
31039 whether our server descriptor has been successfully received by at
31040 least on directory authority. Un-recommend good-server-descriptor
31041 getinfo and status events until we have a better design for them.
31042 - Update to the "September 4 2009" ip-to-country file.
31045 Changes in version 0.2.2.1-alpha - 2009-08-26
31046 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
31047 Tor clients to bootstrap on networks where only port 80 is reachable,
31048 makes it more straightforward to support hardware crypto accelerators,
31049 and starts the groundwork for gathering stats safely at relays.
31052 - Start the process of disabling ".exit" address notation, since it
31053 can be used for a variety of esoteric application-level attacks
31054 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
31057 o New directory authorities:
31058 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
31062 - New AccelName and AccelDir options add support for dynamic OpenSSL
31063 hardware crypto acceleration engines.
31064 - Tor now supports tunneling all of its outgoing connections over
31065 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
31066 configuration options. Code by Christopher Davis.
31069 - Send circuit or stream sendme cells when our window has decreased
31070 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
31071 by Karsten when testing the "reduce circuit window" performance
31072 patch. Bugfix on the 54th commit on Tor -- from July 2002,
31073 before the release of Tor 0.0.0. This is the new winner of the
31076 o New options for gathering stats safely:
31077 - Directory mirrors that set "DirReqStatistics 1" write statistics
31078 about directory requests to disk every 24 hours. As compared to the
31079 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
31080 1) stats are written to disk exactly every 24 hours; 2) estimated
31081 shares of v2 and v3 requests are determined as mean values, not at
31082 the end of a measurement period; 3) unresolved requests are listed
31083 with country code '??'; 4) directories also measure download times.
31084 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
31085 number of exit streams and transferred bytes per port to disk every
31087 - Relays that set "CellStatistics 1" write statistics on how long
31088 cells spend in their circuit queues to disk every 24 hours.
31089 - Entry nodes that set "EntryStatistics 1" write statistics on the
31090 rough number and origins of connecting clients to disk every 24
31092 - Relays that write any of the above statistics to disk and set
31093 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
31094 their extra-info documents.
31097 - New --digests command-line switch to output the digests of the
31098 source files Tor was built with.
31099 - The "torify" script now uses torsocks where available.
31100 - The memarea code now uses a sentinel value at the end of each area
31101 to make sure nothing writes beyond the end of an area. This might
31102 help debug some conceivable causes of bug 930.
31103 - Time and memory units in the configuration file can now be set to
31104 fractional units. For example, "2.5 GB" is now a valid value for
31106 - Certain Tor clients (such as those behind check.torproject.org) may
31107 want to fetch the consensus in an extra early manner. To enable this
31108 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
31109 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
31110 as only certain clients who must have this information sooner should
31112 - Instead of adding the svn revision to the Tor version string, report
31113 the git commit (when we're building from a git checkout).
31116 - If any of the v3 certs we download are unparseable, we should
31117 actually notice the failure so we don't retry indefinitely. Bugfix
31118 on 0.2.0.x; reported by "rotator".
31119 - If the cached cert file is unparseable, warn but don't exit.
31120 - Fix possible segmentation fault on directory authorities. Bugfix on
31122 - When Tor fails to parse a descriptor of any kind, dump it to disk.
31123 Might help diagnosing bug 1051.
31125 o Deprecated and removed features:
31126 - The controller no longer accepts the old obsolete "addr-mappings/"
31127 or "unregistered-servers-" GETINFO values.
31128 - Hidden services no longer publish version 0 descriptors, and clients
31129 do not request or use version 0 descriptors. However, the old hidden
31130 service authorities still accept and serve version 0 descriptors
31131 when contacted by older hidden services/clients.
31132 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
31133 always on; using them is necessary for correct forward-compatible
31135 - Remove support for .noconnect style addresses. Nobody was using
31136 them, and they provided another avenue for detecting Tor users
31137 via application-level web tricks.
31139 o Packaging changes:
31140 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
31141 installer bundles. See
31142 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
31143 for details of what's new in Vidalia 0.2.3.
31144 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
31145 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
31146 configuration file, rather than the old Privoxy.
31147 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
31148 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
31149 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
31150 better compatibility with OS X 10.6, aka Snow Leopard.
31151 - OS X Vidalia Bundle: The multi-package installer is now replaced
31152 by a simple drag and drop to the /Applications folder. This change
31153 occurred with the upgrade to Vidalia 0.2.3.
31156 Changes in version 0.2.1.19 - 2009-07-28
31157 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
31158 services on Tor 0.2.1.3-alpha through 0.2.1.18.
31161 - Make accessing hidden services on 0.2.1.x work right again.
31162 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
31163 part of patch provided by "optimist".
31166 - When a relay/bridge is writing out its identity key fingerprint to
31167 the "fingerprint" file and to its logs, write it without spaces. Now
31168 it will look like the fingerprints in our bridges documentation,
31169 and confuse fewer users.
31172 - Relays no longer publish a new server descriptor if they change
31173 their MaxAdvertisedBandwidth config option but it doesn't end up
31174 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
31175 fixes bug 1026. Patch from Sebastian.
31176 - Avoid leaking memory every time we get a create cell but we have
31177 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
31178 fixes bug 1034. Reported by BarkerJr.
31181 Changes in version 0.2.1.18 - 2009-07-24
31182 Tor 0.2.1.18 lays the foundations for performance improvements,
31183 adds status events to help users diagnose bootstrap problems, adds
31184 optional authentication/authorization for hidden services, fixes a
31185 variety of potential anonymity problems, and includes a huge pile of
31186 other features and bug fixes.
31189 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
31192 Changes in version 0.2.1.17-rc - 2009-07-07
31193 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
31194 candidate for the 0.2.1.x series. It lays the groundwork for further
31195 client performance improvements, and also fixes a big bug with directory
31196 authorities that were causing them to assign Guard and Stable flags
31199 The Windows bundles also finally include the geoip database that we
31200 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
31201 should actually install Torbutton rather than giving you a cryptic
31202 failure message (oops).
31205 - Clients now use the bandwidth values in the consensus, rather than
31206 the bandwidth values in each relay descriptor. This approach opens
31207 the door to more accurate bandwidth estimates once the directory
31208 authorities start doing active measurements. Implements more of
31212 - When Tor clients restart after 1-5 days, they discard all their
31213 cached descriptors as too old, but they still use the cached
31214 consensus document. This approach is good for robustness, but
31215 bad for performance: since they don't know any bandwidths, they
31216 end up choosing at random rather than weighting their choice by
31217 speed. Fixed by the above feature of putting bandwidths in the
31218 consensus. Bugfix on 0.2.0.x.
31219 - Directory authorities were neglecting to mark relays down in their
31220 internal histories if the relays fall off the routerlist without
31221 ever being found unreachable. So there were relays in the histories
31222 that haven't been seen for eight months, and are listed as being
31223 up for eight months. This wreaked havoc on the "median wfu"
31224 and "median mtbf" calculations, in turn making Guard and Stable
31225 flags very wrong, hurting network performance. Fixes bugs 696 and
31226 969. Bugfix on 0.2.0.6-alpha.
31229 - Serve the DirPortFrontPage page even when we have been approaching
31230 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
31231 - The control port would close the connection before flushing long
31232 replies, such as the network consensus, if a QUIT command was issued
31233 before the reply had completed. Now, the control port flushes all
31234 pending replies before closing the connection. Also fixed a spurious
31235 warning when a QUIT command is issued after a malformed or rejected
31236 AUTHENTICATE command, but before the connection was closed. Patch
31237 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31238 - When we can't find an intro key for a v2 hidden service descriptor,
31239 fall back to the v0 hidden service descriptor and log a bug message.
31240 Workaround for bug 1024.
31241 - Fix a log message that did not respect the SafeLogging option.
31245 - If we're a relay and we change our IP address, be more verbose
31246 about the reason that made us change. Should help track down
31247 further bugs for relays on dynamic IP addresses.
31250 Changes in version 0.2.0.35 - 2009-06-24
31252 - Avoid crashing in the presence of certain malformed descriptors.
31253 Found by lark, and by automated fuzzing.
31254 - Fix an edge case where a malicious exit relay could convince a
31255 controller that the client's DNS question resolves to an internal IP
31256 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31259 - Finally fix the bug where dynamic-IP relays disappear when their
31260 IP address changes: directory mirrors were mistakenly telling
31261 them their old address if they asked via begin_dir, so they
31262 never got an accurate answer about their new address, so they
31263 just vanished after a day. For belt-and-suspenders, relays that
31264 don't set Address in their config now avoid using begin_dir for
31265 all direct connections. Should fix bugs 827, 883, and 900.
31266 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31267 that would occur on some exit nodes when DNS failures and timeouts
31268 occurred in certain patterns. Fix for bug 957.
31271 - When starting with a cache over a few days old, do not leak
31272 memory for the obsolete router descriptors in it. Bugfix on
31273 0.2.0.33; fixes bug 672.
31274 - Hidden service clients didn't use a cached service descriptor that
31275 was older than 15 minutes, but wouldn't fetch a new one either,
31276 because there was already one in the cache. Now, fetch a v2
31277 descriptor unless the same descriptor was added to the cache within
31278 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31281 Changes in version 0.2.1.16-rc - 2009-06-20
31282 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31283 a bunch of minor bugs.
31286 - Fix an edge case where a malicious exit relay could convince a
31287 controller that the client's DNS question resolves to an internal IP
31288 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31290 o Major performance improvements (on 0.2.0.x):
31291 - Disable and refactor some debugging checks that forced a linear scan
31292 over the whole server-side DNS cache. These accounted for over 50%
31293 of CPU time on a relatively busy exit node's gprof profile. Found
31295 - Disable some debugging checks that appeared in exit node profile
31299 - Update to the "June 3 2009" ip-to-country file.
31300 - Do not have tor-resolve automatically refuse all .onion addresses;
31301 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31303 o Minor bugfixes (on 0.2.0.x):
31304 - Log correct error messages for DNS-related network errors on
31306 - Fix a race condition that could cause crashes or memory corruption
31307 when running as a server with a controller listening for log
31309 - Avoid crashing when we have a policy specified in a DirPolicy or
31310 SocksPolicy or ReachableAddresses option with ports set on it,
31311 and we re-load the policy. May fix bug 996.
31312 - Hidden service clients didn't use a cached service descriptor that
31313 was older than 15 minutes, but wouldn't fetch a new one either,
31314 because there was already one in the cache. Now, fetch a v2
31315 descriptor unless the same descriptor was added to the cache within
31316 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31318 o Minor bugfixes (on 0.2.1.x):
31319 - Don't warn users about low port and hibernation mix when they
31320 provide a *ListenAddress directive to fix that. Bugfix on
31322 - When switching back and forth between bridge mode, do not start
31323 gathering GeoIP data until two hours have passed.
31324 - Do not complain that the user has requested an excluded node as
31325 an exit when the node is not really an exit. This could happen
31326 because the circuit was for testing, or an introduction point.
31330 Changes in version 0.2.1.15-rc - 2009-05-25
31331 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31332 series. It fixes a major bug on fast exit relays, as well as a variety
31333 of more minor bugs.
31335 o Major bugfixes (on 0.2.0.x):
31336 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31337 that would occur on some exit nodes when DNS failures and timeouts
31338 occurred in certain patterns. Fix for bug 957.
31340 o Minor bugfixes (on 0.2.0.x):
31341 - Actually return -1 in the error case for read_bandwidth_usage().
31342 Harmless bug, since we currently don't care about the return value
31343 anywhere. Bugfix on 0.2.0.9-alpha.
31344 - Provide a more useful log message if bug 977 (related to buffer
31345 freelists) ever reappears, and do not crash right away.
31346 - Fix an assertion failure on 64-bit platforms when we allocated
31347 memory right up to the end of a memarea, then realigned the memory
31348 one step beyond the end. Fixes a possible cause of bug 930.
31349 - Protect the count of open sockets with a mutex, so we can't
31350 corrupt it when two threads are closing or opening sockets at once.
31351 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31352 - Don't allow a bridge to publish its router descriptor to a
31353 non-bridge directory authority. Fixes part of bug 932.
31354 - When we change to or from being a bridge, reset our counts of
31355 client usage by country. Fixes bug 932.
31356 - Fix a bug that made stream bandwidth get misreported to the
31358 - Stop using malloc_usable_size() to use more area than we had
31359 actually allocated: it was safe, but made valgrind really unhappy.
31360 - Fix a memory leak when v3 directory authorities load their keys
31361 and cert from disk. Bugfix on 0.2.0.1-alpha.
31363 o Minor bugfixes (on 0.2.1.x):
31364 - Fix use of freed memory when deciding to mark a non-addable
31365 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31368 Changes in version 0.2.1.14-rc - 2009-04-12
31369 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31370 series. It begins fixing some major performance problems, and also
31371 finally addresses the bug that was causing relays on dynamic IP
31372 addresses to fall out of the directory.
31375 - Clients replace entry guards that were chosen more than a few months
31376 ago. This change should significantly improve client performance,
31377 especially once more people upgrade, since relays that have been
31378 a guard for a long time are currently overloaded.
31380 o Major bugfixes (on 0.2.0):
31381 - Finally fix the bug where dynamic-IP relays disappear when their
31382 IP address changes: directory mirrors were mistakenly telling
31383 them their old address if they asked via begin_dir, so they
31384 never got an accurate answer about their new address, so they
31385 just vanished after a day. For belt-and-suspenders, relays that
31386 don't set Address in their config now avoid using begin_dir for
31387 all direct connections. Should fix bugs 827, 883, and 900.
31388 - Relays were falling out of the networkstatus consensus for
31389 part of a day if they changed their local config but the
31390 authorities discarded their new descriptor as "not sufficiently
31391 different". Now directory authorities accept a descriptor as changed
31392 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31393 patch by Sebastian.
31394 - Avoid crashing in the presence of certain malformed descriptors.
31395 Found by lark, and by automated fuzzing.
31398 - When generating circuit events with verbose nicknames for
31399 controllers, try harder to look up nicknames for routers on a
31400 circuit. (Previously, we would look in the router descriptors we had
31401 for nicknames, but not in the consensus.) Partial fix for bug 941.
31402 - If the bridge config line doesn't specify a port, assume 443.
31403 This makes bridge lines a bit smaller and easier for users to
31405 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31406 bytes (aka 20KB/s), to match our documentation. Also update
31407 directory authorities so they always assign the Fast flag to relays
31408 with 20KB/s of capacity. Now people running relays won't suddenly
31409 find themselves not seeing any use, if the network gets faster
31411 - Update to the "April 3 2009" ip-to-country file.
31414 - Avoid trying to print raw memory to the logs when we decide to
31415 give up on downloading a given relay descriptor. Bugfix on
31417 - In tor-resolve, when the Tor client to use is specified by
31418 <hostname>:<port>, actually use the specified port rather than
31419 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31420 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31421 - When starting with a cache over a few days old, do not leak
31422 memory for the obsolete router descriptors in it. Bugfix on
31424 - Avoid double-free on list of successfully uploaded hidden
31425 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31426 - Change memarea_strndup() implementation to work even when
31427 duplicating a string at the end of a page. This bug was
31428 harmless for now, but could have meant crashes later. Fix by
31429 lark. Bugfix on 0.2.1.1-alpha.
31430 - Limit uploaded directory documents to be 16M rather than 500K.
31431 The directory authorities were refusing v3 consensus votes from
31432 other authorities, since the votes are now 504K. Fixes bug 959;
31433 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31434 - Directory authorities should never send a 503 "busy" response to
31435 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31439 Changes in version 0.2.1.13-alpha - 2009-03-09
31440 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31441 cleanups. We're finally getting close to a release candidate.
31444 - Correctly update the list of which countries we exclude as
31445 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
31446 lark. Bugfix on 0.2.1.6-alpha.
31448 o Minor bugfixes (on 0.2.0.x and earlier):
31449 - Automatically detect MacOSX versions earlier than 10.4.0, and
31450 disable kqueue from inside Tor when running with these versions.
31451 We previously did this from the startup script, but that was no
31452 help to people who didn't use the startup script. Resolves bug 863.
31453 - When we had picked an exit node for a connection, but marked it as
31454 "optional", and it turned out we had no onion key for the exit,
31455 stop wanting that exit and try again. This situation may not
31456 be possible now, but will probably become feasible with proposal
31457 158. Spotted by rovv. Fixes another case of bug 752.
31458 - Clients no longer cache certificates for authorities they do not
31459 recognize. Bugfix on 0.2.0.9-alpha.
31460 - When we can't transmit a DNS request due to a network error, retry
31461 it after a while, and eventually transmit a failing response to
31462 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
31463 - If the controller claimed responsibility for a stream, but that
31464 stream never finished making its connection, it would live
31465 forever in circuit_wait state. Now we close it after SocksTimeout
31466 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
31467 - Drop begin cells to a hidden service if they come from the middle
31468 of a circuit. Patch from lark.
31469 - When we erroneously receive two EXTEND cells for the same circuit
31470 ID on the same connection, drop the second. Patch from lark.
31471 - Fix a crash that occurs on exit nodes when a nameserver request
31472 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
31473 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
31475 - Do not assume that a stack-allocated character array will be
31476 64-bit aligned on platforms that demand that uint64_t access is
31477 aligned. Possible fix for bug 604.
31478 - Parse dates and IPv4 addresses in a locale- and libc-independent
31479 manner, to avoid platform-dependent behavior on malformed input.
31480 - Build correctly when configured to build outside the main source
31481 path. Patch from Michael Gold.
31482 - We were already rejecting relay begin cells with destination port
31483 of 0. Now also reject extend cells with destination port or address
31484 of 0. Suggested by lark.
31486 o Minor bugfixes (on 0.2.1.x):
31487 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
31488 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
31489 - If we're an exit node, scrub the IP address to which we are exiting
31490 in the logs. Bugfix on 0.2.1.8-alpha.
31493 - On Linux, use the prctl call to re-enable core dumps when the user
31495 - New controller event NEWCONSENSUS that lists the networkstatus
31496 lines for every recommended relay. Now controllers like Torflow
31497 can keep up-to-date on which relays they should be using.
31498 - Update to the "February 26 2009" ip-to-country file.
31501 Changes in version 0.2.0.34 - 2009-02-08
31502 Tor 0.2.0.34 features several more security-related fixes. You should
31503 upgrade, especially if you run an exit relay (remote crash) or a
31504 directory authority (remote infinite loop), or you're on an older
31505 (pre-XP) or not-recently-patched Windows (remote exploit).
31507 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
31508 have many known flaws, and nobody should be using them. You should
31509 upgrade. If you're using a Linux or BSD and its packages are obsolete,
31510 stop using those packages and upgrade anyway.
31513 - Fix an infinite-loop bug on handling corrupt votes under certain
31514 circumstances. Bugfix on 0.2.0.8-alpha.
31515 - Fix a temporary DoS vulnerability that could be performed by
31516 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31517 - Avoid a potential crash on exit nodes when processing malformed
31518 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
31519 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31520 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31523 - Fix compilation on systems where time_t is a 64-bit integer.
31524 Patch from Matthias Drochner.
31525 - Don't consider expiring already-closed client connections. Fixes
31526 bug 893. Bugfix on 0.0.2pre20.
31529 Changes in version 0.2.1.12-alpha - 2009-02-08
31530 Tor 0.2.1.12-alpha features several more security-related fixes. You
31531 should upgrade, especially if you run an exit relay (remote crash) or
31532 a directory authority (remote infinite loop), or you're on an older
31533 (pre-XP) or not-recently-patched Windows (remote exploit). It also
31534 includes a big pile of minor bugfixes and cleanups.
31537 - Fix an infinite-loop bug on handling corrupt votes under certain
31538 circumstances. Bugfix on 0.2.0.8-alpha.
31539 - Fix a temporary DoS vulnerability that could be performed by
31540 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31541 - Avoid a potential crash on exit nodes when processing malformed
31542 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
31545 - Let controllers actually ask for the "clients_seen" event for
31546 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
31547 reported by Matt Edman.
31548 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
31550 - Fix a bug in address parsing that was preventing bridges or hidden
31551 service targets from being at IPv6 addresses.
31552 - Solve a bug that kept hardware crypto acceleration from getting
31553 enabled when accounting was turned on. Fixes bug 907. Bugfix on
31555 - Remove a bash-ism from configure.in to build properly on non-Linux
31556 platforms. Bugfix on 0.2.1.1-alpha.
31557 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
31558 headers. Bugfix on 0.2.0.10-alpha.
31559 - Don't consider expiring already-closed client connections. Fixes
31560 bug 893. Bugfix on 0.0.2pre20.
31561 - Fix another interesting corner-case of bug 891 spotted by rovv:
31562 Previously, if two hosts had different amounts of clock drift, and
31563 one of them created a new connection with just the wrong timing,
31564 the other might decide to deprecate the new connection erroneously.
31565 Bugfix on 0.1.1.13-alpha.
31566 - Resolve a very rare crash bug that could occur when the user forced
31567 a nameserver reconfiguration during the middle of a nameserver
31568 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31569 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31570 Bugfix on 0.2.1.7-alpha.
31571 - If we're using bridges and our network goes away, be more willing
31572 to forgive our bridges and try again when we get an application
31573 request. Bugfix on 0.2.0.x.
31576 - Support platforms where time_t is 64 bits long. (Congratulations,
31577 NetBSD!) Patch from Matthias Drochner.
31578 - Add a 'getinfo status/clients-seen' controller command, in case
31579 controllers want to hear clients_seen events but connect late.
31582 - Disable GCC's strict alias optimization by default, to avoid the
31583 likelihood of its introducing subtle bugs whenever our code violates
31584 the letter of C99's alias rules.
31587 Changes in version 0.2.0.33 - 2009-01-21
31588 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
31589 useful to users. It also finally fixes a bug where a relay or client
31590 that's been off for many days would take a long time to bootstrap.
31592 This update also fixes an important security-related bug reported by
31593 Ilja van Sprundel. You should upgrade. (We'll send out more details
31594 about the bug once people have had some time to upgrade.)
31597 - Fix a heap-corruption bug that may be remotely triggerable on
31598 some platforms. Reported by Ilja van Sprundel.
31601 - When a stream at an exit relay is in state "resolving" or
31602 "connecting" and it receives an "end" relay cell, the exit relay
31603 would silently ignore the end cell and not close the stream. If
31604 the client never closes the circuit, then the exit relay never
31605 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
31606 reported by "wood".
31607 - When sending CREATED cells back for a given circuit, use a 64-bit
31608 connection ID to find the right connection, rather than an addr:port
31609 combination. Now that we can have multiple OR connections between
31610 the same ORs, it is no longer possible to use addr:port to uniquely
31611 identify a connection.
31612 - Bridge relays that had DirPort set to 0 would stop fetching
31613 descriptors shortly after startup, and then briefly resume
31614 after a new bandwidth test and/or after publishing a new bridge
31615 descriptor. Bridge users that try to bootstrap from them would
31616 get a recent networkstatus but would get descriptors from up to
31617 18 hours earlier, meaning most of the descriptors were obsolete
31618 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31619 - Prevent bridge relays from serving their 'extrainfo' document
31620 to anybody who asks, now that extrainfo docs include potentially
31621 sensitive aggregated client geoip summaries. Bugfix on
31623 - If the cached networkstatus consensus is more than five days old,
31624 discard it rather than trying to use it. In theory it could be
31625 useful because it lists alternate directory mirrors, but in practice
31626 it just means we spend many minutes trying directory mirrors that
31627 are long gone from the network. Also discard router descriptors as
31628 we load them if they are more than five days old, since the onion
31629 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
31632 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31633 could make gcc generate non-functional binary search code. Bugfix
31635 - Build correctly on platforms without socklen_t.
31636 - Compile without warnings on solaris.
31637 - Avoid potential crash on internal error during signature collection.
31638 Fixes bug 864. Patch from rovv.
31639 - Correct handling of possible malformed authority signing key
31640 certificates with internal signature types. Fixes bug 880.
31641 Bugfix on 0.2.0.3-alpha.
31642 - Fix a hard-to-trigger resource leak when logging credential status.
31644 - When we can't initialize DNS because the network is down, do not
31645 automatically stop Tor from starting. Instead, we retry failed
31646 dns_init() every 10 minutes, and change the exit policy to reject
31647 *:* until one succeeds. Fixes bug 691.
31648 - Use 64 bits instead of 32 bits for connection identifiers used with
31649 the controller protocol, to greatly reduce risk of identifier reuse.
31650 - When we're choosing an exit node for a circuit, and we have
31651 no pending streams, choose a good general exit rather than one that
31652 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31653 - Fix another case of assuming, when a specific exit is requested,
31654 that we know more than the user about what hosts it allows.
31655 Fixes one case of bug 752. Patch from rovv.
31656 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31657 seconds. Warn the user if lower values are given in the
31658 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31659 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31660 user if lower values are given in the configuration. Bugfix on
31661 0.1.1.17-rc. Patch by Sebastian.
31662 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
31663 the cache because we already had a v0 descriptor with the same ID.
31664 Bugfix on 0.2.0.18-alpha.
31665 - Fix a race condition when freeing keys shared between main thread
31666 and CPU workers that could result in a memory leak. Bugfix on
31667 0.1.0.1-rc. Fixes bug 889.
31668 - Send a valid END cell back when a client tries to connect to a
31669 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31670 840. Patch from rovv.
31671 - Check which hops rendezvous stream cells are associated with to
31672 prevent possible guess-the-streamid injection attacks from
31673 intermediate hops. Fixes another case of bug 446. Based on patch
31675 - If a broken client asks a non-exit router to connect somewhere,
31676 do not even do the DNS lookup before rejecting the connection.
31677 Fixes another case of bug 619. Patch from rovv.
31678 - When a relay gets a create cell it can't decrypt (e.g. because it's
31679 using the wrong onion key), we were dropping it and letting the
31680 client time out. Now actually answer with a destroy cell. Fixes
31681 bug 904. Bugfix on 0.0.2pre8.
31683 o Minor bugfixes (hidden services):
31684 - Do not throw away existing introduction points on SIGHUP. Bugfix on
31685 0.0.6pre1. Patch by Karsten. Fixes bug 874.
31688 - Report the case where all signatures in a detached set are rejected
31689 differently than the case where there is an error handling the
31691 - When we realize that another process has modified our cached
31692 descriptors, print out a more useful error message rather than
31693 triggering an assertion. Fixes bug 885. Patch from Karsten.
31694 - Implement the 0x20 hack to better resist DNS poisoning: set the
31695 case on outgoing DNS requests randomly, and reject responses that do
31696 not match the case correctly. This logic can be disabled with the
31697 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31698 of servers that do not reliably preserve case in replies. See
31699 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31701 - Check DNS replies for more matching fields to better resist DNS
31703 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31704 compress cells, which are basically all encrypted, compressed, or
31708 Changes in version 0.2.1.11-alpha - 2009-01-20
31709 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
31710 week it will take a long time to bootstrap again" bug. It also fixes
31711 an important security-related bug reported by Ilja van Sprundel. You
31712 should upgrade. (We'll send out more details about the bug once people
31713 have had some time to upgrade.)
31716 - Fix a heap-corruption bug that may be remotely triggerable on
31717 some platforms. Reported by Ilja van Sprundel.
31720 - Discard router descriptors as we load them if they are more than
31721 five days old. Otherwise if Tor is off for a long time and then
31722 starts with cached descriptors, it will try to use the onion
31723 keys in those obsolete descriptors when building circuits. Bugfix
31724 on 0.2.0.x. Fixes bug 887.
31727 - Try to make sure that the version of Libevent we're running with
31728 is binary-compatible with the one we built with. May address bug
31730 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
31731 for bug 905. Bugfix on 0.2.1.7-alpha.
31732 - Add a new --enable-local-appdata configuration switch to change
31733 the default location of the datadir on win32 from APPDATA to
31734 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
31735 entirely. Patch from coderman.
31738 - Make outbound DNS packets respect the OutboundBindAddress setting.
31739 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
31740 - When our circuit fails at the first hop (e.g. we get a destroy
31741 cell back), avoid using that OR connection anymore, and also
31742 tell all the one-hop directory requests waiting for it that they
31743 should fail. Bugfix on 0.2.1.3-alpha.
31744 - In the torify(1) manpage, mention that tsocks will leak your
31748 Changes in version 0.2.1.10-alpha - 2009-01-06
31749 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
31750 would make the bridge relay not so useful if it had DirPort set to 0,
31751 and one that could let an attacker learn a little bit of information
31752 about the bridge's users), and a bug that would cause your Tor relay
31753 to ignore a circuit create request it can't decrypt (rather than reply
31754 with an error). It also fixes a wide variety of other bugs.
31757 - If the cached networkstatus consensus is more than five days old,
31758 discard it rather than trying to use it. In theory it could
31759 be useful because it lists alternate directory mirrors, but in
31760 practice it just means we spend many minutes trying directory
31761 mirrors that are long gone from the network. Helps bug 887 a bit;
31763 - Bridge relays that had DirPort set to 0 would stop fetching
31764 descriptors shortly after startup, and then briefly resume
31765 after a new bandwidth test and/or after publishing a new bridge
31766 descriptor. Bridge users that try to bootstrap from them would
31767 get a recent networkstatus but would get descriptors from up to
31768 18 hours earlier, meaning most of the descriptors were obsolete
31769 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31770 - Prevent bridge relays from serving their 'extrainfo' document
31771 to anybody who asks, now that extrainfo docs include potentially
31772 sensitive aggregated client geoip summaries. Bugfix on
31776 - New controller event "clients_seen" to report a geoip-based summary
31777 of which countries we've seen clients from recently. Now controllers
31778 like Vidalia can show bridge operators that they're actually making
31780 - Build correctly against versions of OpenSSL 0.9.8 or later built
31781 without support for deprecated functions.
31782 - Update to the "December 19 2008" ip-to-country file.
31784 o Minor bugfixes (on 0.2.0.x):
31785 - Authorities now vote for the Stable flag for any router whose
31786 weighted MTBF is at least 5 days, regardless of the mean MTBF.
31787 - Do not remove routers as too old if we do not have any consensus
31788 document. Bugfix on 0.2.0.7-alpha.
31789 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31790 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31791 - When an exit relay resolves a stream address to a local IP address,
31792 do not just keep retrying that same exit relay over and
31793 over. Instead, just close the stream. Addresses bug 872. Bugfix
31794 on 0.2.0.32. Patch from rovv.
31795 - If a hidden service sends us an END cell, do not consider
31796 retrying the connection; just close it. Patch from rovv.
31797 - When we made bridge authorities stop serving bridge descriptors over
31798 unencrypted links, we also broke DirPort reachability testing for
31799 bridges. So bridges with a non-zero DirPort were printing spurious
31800 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
31801 - When a relay gets a create cell it can't decrypt (e.g. because it's
31802 using the wrong onion key), we were dropping it and letting the
31803 client time out. Now actually answer with a destroy cell. Fixes
31804 bug 904. Bugfix on 0.0.2pre8.
31805 - Squeeze 2-5% out of client performance (according to oprofile) by
31806 improving the implementation of some policy-manipulation functions.
31808 o Minor bugfixes (on 0.2.1.x):
31809 - Make get_interface_address() function work properly again; stop
31810 guessing the wrong parts of our address as our address.
31811 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
31812 send on that circuit. Otherwise we might violate the proposal-110
31813 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
31815 - When we're sending non-EXTEND cells to the first hop in a circuit,
31816 for example to use an encrypted directory connection, we don't need
31817 to use RELAY_EARLY cells: the first hop knows what kind of cell
31818 it is, and nobody else can even see the cell type. Conserving
31819 RELAY_EARLY cells makes it easier to cannibalize circuits like
31821 - Stop logging nameserver addresses in reverse order.
31822 - If we are retrying a directory download slowly over and over, do
31823 not automatically give up after the 254th failure. Bugfix on
31825 - Resume reporting accurate "stream end" reasons to the local control
31826 port. They were lost in the changes for Proposal 148. Bugfix on
31829 o Deprecated and removed features:
31830 - The old "tor --version --version" command, which would print out
31831 the subversion "Id" of most of the source files, is now removed. It
31832 turned out to be less useful than we'd expected, and harder to
31835 o Code simplifications and refactoring:
31836 - Change our header file guard macros to be less likely to conflict
31837 with system headers. Adam Langley noticed that we were conflicting
31838 with log.h on Android.
31839 - Tool-assisted documentation cleanup. Nearly every function or
31840 static variable in Tor should have its own documentation now.
31843 Changes in version 0.2.1.9-alpha - 2008-12-25
31844 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
31846 o New directory authorities:
31847 - gabelmoo (the authority run by Karsten Loesing) now has a new
31851 - Never use a connection with a mismatched address to extend a
31852 circuit, unless that connection is canonical. A canonical
31853 connection is one whose address is authenticated by the router's
31854 identity key, either in a NETINFO cell or in a router descriptor.
31855 - Avoid a possible memory corruption bug when receiving hidden service
31856 descriptors. Bugfix on 0.2.1.6-alpha.
31859 - Fix a logic error that would automatically reject all but the first
31860 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
31861 part of bug 813/868. Bug spotted by coderman.
31862 - When a stream at an exit relay is in state "resolving" or
31863 "connecting" and it receives an "end" relay cell, the exit relay
31864 would silently ignore the end cell and not close the stream. If
31865 the client never closes the circuit, then the exit relay never
31866 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
31867 reported by "wood".
31868 - When we can't initialize DNS because the network is down, do not
31869 automatically stop Tor from starting. Instead, retry failed
31870 dns_init() every 10 minutes, and change the exit policy to reject
31871 *:* until one succeeds. Fixes bug 691.
31874 - Give a better error message when an overzealous init script says
31875 "sudo -u username tor --user username". Makes Bug 882 easier for
31877 - When a directory authority gives us a new guess for our IP address,
31878 log which authority we used. Hopefully this will help us debug
31879 the recent complaints about bad IP address guesses.
31880 - Detect svn revision properly when we're using git-svn.
31881 - Try not to open more than one descriptor-downloading connection
31882 to an authority at once. This should reduce load on directory
31883 authorities. Fixes bug 366.
31884 - Add cross-certification to newly generated certificates, so that
31885 a signing key is enough information to look up a certificate.
31886 Partial implementation of proposal 157.
31887 - Start serving certificates by <identity digest, signing key digest>
31888 pairs. Partial implementation of proposal 157.
31889 - Clients now never report any stream end reason except 'MISC'.
31890 Implements proposal 148.
31891 - On platforms with a maximum syslog string length, truncate syslog
31892 messages to that length ourselves, rather than relying on the
31893 system to do it for us.
31894 - Optimize out calls to time(NULL) that occur for every IO operation,
31895 or for every cell. On systems where time() is a slow syscall,
31896 this fix will be slightly helpful.
31897 - Exit servers can now answer resolve requests for ip6.arpa addresses.
31898 - When we download a descriptor that we then immediately (as
31899 a directory authority) reject, do not retry downloading it right
31900 away. Should save some bandwidth on authorities. Fix for bug
31901 888. Patch by Sebastian Hahn.
31902 - When a download gets us zero good descriptors, do not notify
31903 Tor that new directory information has arrived.
31904 - Avoid some nasty corner cases in the logic for marking connections
31905 as too old or obsolete or noncanonical for circuits. Partial
31908 o Minor features (controller):
31909 - New CONSENSUS_ARRIVED event to note when a new consensus has
31910 been fetched and validated.
31911 - When we realize that another process has modified our cached
31912 descriptors file, print out a more useful error message rather
31913 than triggering an assertion. Fixes bug 885. Patch from Karsten.
31914 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
31915 controllers to prevent SIGHUP from reloading the
31916 configuration. Fixes bug 856.
31919 - Resume using the correct "REASON=" stream when telling the
31920 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
31921 - When a canonical connection appears later in our internal list
31922 than a noncanonical one for a given OR ID, always use the
31923 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
31925 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31926 seconds. Warn the user if lower values are given in the
31927 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31928 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31929 user if lower values are given in the configuration. Bugfix on
31930 0.1.1.17-rc. Patch by Sebastian.
31931 - Fix a race condition when freeing keys shared between main thread
31932 and CPU workers that could result in a memory leak. Bugfix on
31933 0.1.0.1-rc. Fixes bug 889.
31935 o Minor bugfixes (hidden services):
31936 - Do not throw away existing introduction points on SIGHUP (bugfix on
31937 0.0.6pre1); also, do not stall hidden services because we're
31938 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
31939 by John Brooks. Patch by Karsten. Fixes bug 874.
31940 - Fix a memory leak when we decline to add a v2 rendezvous
31941 descriptor to the cache because we already had a v0 descriptor
31942 with the same ID. Bugfix on 0.2.0.18-alpha.
31944 o Deprecated and removed features:
31945 - RedirectExits has been removed. It was deprecated since
31947 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
31948 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
31949 - Cell pools are now always enabled; --disable-cell-pools is ignored.
31951 o Code simplifications and refactoring:
31952 - Rename the confusing or_is_obsolete field to the more appropriate
31953 is_bad_for_new_circs, and move it to or_connection_t where it
31955 - Move edge-only flags from connection_t to edge_connection_t: not
31956 only is this better coding, but on machines of plausible alignment,
31957 it should save 4-8 bytes per connection_t. "Every little bit helps."
31958 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
31959 for consistency; keep old option working for backward compatibility.
31960 - Simplify the code for finding connections to use for a circuit.
31963 Changes in version 0.2.1.8-alpha - 2008-12-08
31964 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
31965 builds better on unusual platforms like Solaris and old OS X, and
31966 fixes a variety of other issues.
31969 - New DirPortFrontPage option that takes an html file and publishes
31970 it as "/" on the DirPort. Now relay operators can provide a
31971 disclaimer without needing to set up a separate webserver. There's
31972 a sample disclaimer in contrib/tor-exit-notice.html.
31975 - When the client is choosing entry guards, now it selects at most
31976 one guard from a given relay family. Otherwise we could end up with
31977 all of our entry points into the network run by the same operator.
31978 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
31981 - Fix a DOS opportunity during the voting signature collection process
31982 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31983 - Fix a possible segfault when establishing an exit connection. Bugfix
31987 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
31989 - Made Tor a little less aggressive about deleting expired
31990 certificates. Partial fix for bug 854.
31991 - Stop doing unaligned memory access that generated bus errors on
31992 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
31993 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
31994 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
31995 - Make USR2 log-level switch take effect immediately. Bugfix on
31997 - If one win32 nameserver fails to get added, continue adding the
31998 rest, and don't automatically fail.
31999 - Use fcntl() for locking when flock() is not available. Should fix
32000 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
32001 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
32002 could make gcc generate non-functional binary search code. Bugfix
32004 - Build correctly on platforms without socklen_t.
32005 - Avoid potential crash on internal error during signature collection.
32006 Fixes bug 864. Patch from rovv.
32007 - Do not use C's stdio library for writing to log files. This will
32008 improve logging performance by a minute amount, and will stop
32009 leaking fds when our disk is full. Fixes bug 861.
32010 - Stop erroneous use of O_APPEND in cases where we did not in fact
32011 want to re-seek to the end of a file before every last write().
32012 - Correct handling of possible malformed authority signing key
32013 certificates with internal signature types. Fixes bug 880. Bugfix
32015 - Fix a hard-to-trigger resource leak when logging credential status.
32019 - Directory mirrors no longer fetch the v1 directory or
32020 running-routers files. They are obsolete, and nobody asks for them
32021 anymore. This is the first step to making v1 authorities obsolete.
32023 o Minor features (controller):
32024 - Return circuit purposes in response to GETINFO circuit-status. Fixes
32028 Changes in version 0.2.0.32 - 2008-11-20
32029 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
32030 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32031 a smaller security flaw that might allow an attacker to access local
32032 services, further improves hidden service performance, and fixes a
32033 variety of other issues.
32036 - The "User" and "Group" config options did not clear the
32037 supplementary group entries for the Tor process. The "User" option
32038 is now more robust, and we now set the groups to the specified
32039 user's primary group. The "Group" option is now ignored. For more
32040 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32041 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32042 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
32043 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32044 consistently obeyed: if an exit relay refuses a stream because its
32045 exit policy doesn't allow it, we would remember what IP address
32046 the relay said the destination address resolves to, even if it's
32047 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32050 - Fix a DOS opportunity during the voting signature collection process
32051 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
32053 o Major bugfixes (hidden services):
32054 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32055 we were failing the whole hidden service request when the v0
32056 descriptor fetch fails, even if the v2 fetch is still pending and
32057 might succeed. Similarly, if the last v2 fetch fails, we were
32058 failing the whole hidden service request even if a v0 fetch is
32059 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32060 - When extending a circuit to a hidden service directory to upload a
32061 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32062 requests failed, because the router descriptor has not been
32063 downloaded yet. In these cases, do not attempt to upload the
32064 rendezvous descriptor, but wait until the router descriptor is
32065 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
32066 descriptor from a hidden service directory for which the router
32067 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
32071 - Fix several infrequent memory leaks spotted by Coverity.
32072 - When testing for libevent functions, set the LDFLAGS variable
32073 correctly. Found by Riastradh.
32074 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32075 bootstrapping with tunneled directory connections. Bugfix on
32076 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32077 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32078 and we know that server B rejects most-but-not all connections to
32079 port 80, we would previously reject the connection. Now, we assume
32080 the user knows what they were asking for. Fixes bug 752. Bugfix
32081 on 0.0.9rc5. Diagnosed by BarkerJr.
32082 - If we overrun our per-second write limits a little, count this as
32083 having used up our write allocation for the second, and choke
32084 outgoing directory writes. Previously, we had only counted this when
32085 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
32086 Bugfix on 0.2.0.x (??).
32087 - Remove the old v2 directory authority 'lefkada' from the default
32088 list. It has been gone for many months.
32089 - Stop doing unaligned memory access that generated bus errors on
32090 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
32091 - Make USR2 log-level switch take effect immediately. Bugfix on
32094 o Minor bugfixes (controller):
32095 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
32096 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
32099 Changes in version 0.2.1.7-alpha - 2008-11-08
32100 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
32101 packages (and maybe other packages) noticed by Theo de Raadt, fixes
32102 a smaller security flaw that might allow an attacker to access local
32103 services, adds better defense against DNS poisoning attacks on exit
32104 relays, further improves hidden service performance, and fixes a
32105 variety of other issues.
32108 - The "ClientDNSRejectInternalAddresses" config option wasn't being
32109 consistently obeyed: if an exit relay refuses a stream because its
32110 exit policy doesn't allow it, we would remember what IP address
32111 the relay said the destination address resolves to, even if it's
32112 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
32113 - The "User" and "Group" config options did not clear the
32114 supplementary group entries for the Tor process. The "User" option
32115 is now more robust, and we now set the groups to the specified
32116 user's primary group. The "Group" option is now ignored. For more
32117 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
32118 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
32119 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
32120 - Do not use or believe expired v3 authority certificates. Patch
32121 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
32124 - Now NodeFamily and MyFamily config options allow spaces in
32125 identity fingerprints, so it's easier to paste them in.
32126 Suggested by Lucky Green.
32127 - Implement the 0x20 hack to better resist DNS poisoning: set the
32128 case on outgoing DNS requests randomly, and reject responses that do
32129 not match the case correctly. This logic can be disabled with the
32130 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
32131 of servers that do not reliably preserve case in replies. See
32132 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
32134 - Preserve case in replies to DNSPort requests in order to support
32135 the 0x20 hack for resisting DNS poisoning attacks.
32137 o Hidden service performance improvements:
32138 - When the client launches an introduction circuit, retry with a
32139 new circuit after 30 seconds rather than 60 seconds.
32140 - Launch a second client-side introduction circuit in parallel
32141 after a delay of 15 seconds (based on work by Christian Wilms).
32142 - Hidden services start out building five intro circuits rather
32143 than three, and when the first three finish they publish a service
32144 descriptor using those. Now we publish our service descriptor much
32145 faster after restart.
32148 - Minor fix in the warning messages when you're having problems
32149 bootstrapping; also, be more forgiving of bootstrap problems when
32150 we're still making incremental progress on a given bootstrap phase.
32151 - When we're choosing an exit node for a circuit, and we have
32152 no pending streams, choose a good general exit rather than one that
32153 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
32154 - Send a valid END cell back when a client tries to connect to a
32155 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
32156 840. Patch from rovv.
32157 - If a broken client asks a non-exit router to connect somewhere,
32158 do not even do the DNS lookup before rejecting the connection.
32159 Fixes another case of bug 619. Patch from rovv.
32160 - Fix another case of assuming, when a specific exit is requested,
32161 that we know more than the user about what hosts it allows.
32162 Fixes another case of bug 752. Patch from rovv.
32163 - Check which hops rendezvous stream cells are associated with to
32164 prevent possible guess-the-streamid injection attacks from
32165 intermediate hops. Fixes another case of bug 446. Based on patch
32167 - Avoid using a negative right-shift when comparing 32-bit
32168 addresses. Possible fix for bug 845 and bug 811.
32169 - Make the assert_circuit_ok() function work correctly on circuits that
32170 have already been marked for close.
32171 - Fix read-off-the-end-of-string error in unit tests when decoding
32172 introduction points.
32173 - Fix uninitialized size field for memory area allocation: may improve
32174 memory performance during directory parsing.
32175 - Treat duplicate certificate fetches as failures, so that we do
32176 not try to re-fetch an expired certificate over and over and over.
32177 - Do not say we're fetching a certificate when we'll in fact skip it
32178 because of a pending download.
32181 Changes in version 0.2.1.6-alpha - 2008-09-30
32182 Tor 0.2.1.6-alpha further improves performance and robustness of
32183 hidden services, starts work on supporting per-country relay selection,
32184 and fixes a variety of smaller issues.
32187 - Implement proposal 121: make it possible to build hidden services
32188 that only certain clients are allowed to connect to. This is
32189 enforced at several points, so that unauthorized clients are unable
32190 to send INTRODUCE cells to the service, or even (depending on the
32191 type of authentication) to learn introduction points. This feature
32192 raises the bar for certain kinds of active attacks against hidden
32193 services. Code by Karsten Loesing.
32194 - Relays now store and serve v2 hidden service descriptors by default,
32195 i.e., the new default value for HidServDirectoryV2 is 1. This is
32196 the last step in proposal 114, which aims to make hidden service
32197 lookups more reliable.
32198 - Start work to allow node restrictions to include country codes. The
32199 syntax to exclude nodes in a country with country code XX is
32200 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
32201 refinement to decide what config options should take priority if
32202 you ask to both use a particular node and exclude it.
32203 - Allow ExitNodes list to include IP ranges and country codes, just
32204 like the Exclude*Nodes lists. Patch from Robert Hogan.
32207 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
32208 Tor to fail to start if you had it configured to use a bridge
32209 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
32210 - When extending a circuit to a hidden service directory to upload a
32211 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
32212 requests failed, because the router descriptor had not been
32213 downloaded yet. In these cases, we now wait until the router
32214 descriptor is downloaded, and then retry. Likewise, clients
32215 now skip over a hidden service directory if they don't yet have
32216 its router descriptor, rather than futilely requesting it and
32217 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
32219 - When fetching v0 and v2 rendezvous service descriptors in parallel,
32220 we were failing the whole hidden service request when the v0
32221 descriptor fetch fails, even if the v2 fetch is still pending and
32222 might succeed. Similarly, if the last v2 fetch fails, we were
32223 failing the whole hidden service request even if a v0 fetch is
32224 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
32225 - DNS replies need to have names matching their requests, but
32226 these names should be in the questions section, not necessarily
32227 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
32230 - Update to the "September 1 2008" ip-to-country file.
32231 - Allow ports 465 and 587 in the default exit policy again. We had
32232 rejected them in 0.1.0.15, because back in 2005 they were commonly
32233 misconfigured and ended up as spam targets. We hear they are better
32234 locked down these days.
32235 - Use a lockfile to make sure that two Tor processes are not
32236 simultaneously running with the same datadir.
32237 - Serve the latest v3 networkstatus consensus via the control
32238 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32239 - Better logging about stability/reliability calculations on directory
32241 - Drop the requirement to have an open dir port for storing and
32242 serving v2 hidden service descriptors.
32243 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32244 help debug WFU and MTBF calculations.
32245 - Implement most of Proposal 152: allow specialized servers to permit
32246 single-hop circuits, and clients to use those servers to build
32247 single-hop circuits when using a specialized controller. Patch
32248 from Josh Albrecht. Resolves feature request 768.
32249 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32250 people find host:port too confusing.
32251 - Make TrackHostExit mappings expire a while after their last use, not
32252 after their creation. Patch from Robert Hogan.
32253 - Provide circuit purposes along with circuit events to the controller.
32256 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32258 - Fixed some memory leaks -- some quite frequent, some almost
32259 impossible to trigger -- based on results from Coverity.
32260 - When testing for libevent functions, set the LDFLAGS variable
32261 correctly. Found by Riastradh.
32262 - Fix an assertion bug in parsing policy-related options; possible fix
32264 - Catch and report a few more bootstrapping failure cases when Tor
32265 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32266 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32267 bootstrapping with tunneled directory connections. Bugfix on
32268 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32269 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32270 and we know that server B rejects most-but-not all connections to
32271 port 80, we would previously reject the connection. Now, we assume
32272 the user knows what they were asking for. Fixes bug 752. Bugfix
32273 on 0.0.9rc5. Diagnosed by BarkerJr.
32274 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32275 service directories if they have no advertised dir port. Bugfix
32277 - If we overrun our per-second write limits a little, count this as
32278 having used up our write allocation for the second, and choke
32279 outgoing directory writes. Previously, we had only counted this when
32280 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32281 Bugfix on 0.2.0.x (??).
32282 - Avoid a "0 divided by 0" calculation when calculating router uptime
32283 at directory authorities. Bugfix on 0.2.0.8-alpha.
32284 - Make DNS resolved controller events into "CLOSED", not
32285 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32287 - Fix a bug where an unreachable relay would establish enough
32288 reachability testing circuits to do a bandwidth test -- if
32289 we already have a connection to the middle hop of the testing
32290 circuit, then it could establish the last hop by using the existing
32291 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32292 circuits no longer use entry guards in 0.2.1.3-alpha.
32293 - If we have correct permissions on $datadir, we complain to stdout
32294 and fail to start. But dangerous permissions on
32295 $datadir/cached-status/ would cause us to open a log and complain
32296 there. Now complain to stdout and fail to start in both cases. Fixes
32297 bug 820, reported by seeess.
32298 - Remove the old v2 directory authority 'lefkada' from the default
32299 list. It has been gone for many months.
32301 o Code simplifications and refactoring:
32302 - Revise the connection_new functions so that a more typesafe variant
32303 exists. This will work better with Coverity, and let us find any
32304 actual mistakes we're making here.
32305 - Refactor unit testing logic so that dmalloc can be used sensibly
32306 with unit tests to check for memory leaks.
32307 - Move all hidden-service related fields from connection and circuit
32308 structure to substructures: this way they won't eat so much memory.
32311 Changes in version 0.2.0.31 - 2008-09-03
32312 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32313 a big bug we're seeing where in rare cases traffic from one Tor stream
32314 gets mixed into another stream, and fixes a variety of smaller issues.
32317 - Make sure that two circuits can never exist on the same connection
32318 with the same circuit ID, even if one is marked for close. This
32319 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32320 - Relays now reject risky extend cells: if the extend cell includes
32321 a digest of all zeroes, or asks to extend back to the relay that
32322 sent the extend cell, tear down the circuit. Ideas suggested
32324 - If not enough of our entry guards are available so we add a new
32325 one, we might use the new one even if it overlapped with the
32326 current circuit's exit relay (or its family). Anonymity bugfix
32327 pointed out by rovv.
32330 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32331 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32332 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32333 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32334 - Pick size of default geoip filename string correctly on windows.
32335 Fixes bug 806. Bugfix on 0.2.0.30.
32336 - Make the autoconf script accept the obsolete --with-ssl-dir
32337 option as an alias for the actually-working --with-openssl-dir
32338 option. Fix the help documentation to recommend --with-openssl-dir.
32339 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32340 - When using the TransPort option on OpenBSD, and using the User
32341 option to change UID and drop privileges, make sure to open
32342 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32343 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32344 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32345 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32346 on the client side when connecting to a hidden service. Bugfix
32347 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32348 - When closing an application-side connection because its circuit is
32349 getting torn down, generate the stream event correctly. Bugfix on
32350 0.1.2.x. Anonymous patch.
32353 Changes in version 0.2.1.5-alpha - 2008-08-31
32354 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32355 in a lot of the infrastructure for adding authorization to hidden
32356 services, lays the groundwork for having clients read their load
32357 balancing information out of the networkstatus consensus rather than
32358 the individual router descriptors, addresses two potential anonymity
32359 issues, and fixes a variety of smaller issues.
32362 - Convert many internal address representations to optionally hold
32364 - Generate and accept IPv6 addresses in many protocol elements.
32365 - Make resolver code handle nameservers located at ipv6 addresses.
32366 - Begin implementation of proposal 121 ("Client authorization for
32367 hidden services"): configure hidden services with client
32368 authorization, publish descriptors for them, and configure
32369 authorization data for hidden services at clients. The next
32370 step is to actually access hidden services that perform client
32372 - More progress toward proposal 141: Network status consensus
32373 documents and votes now contain bandwidth information for each
32374 router and a summary of that router's exit policy. Eventually this
32375 will be used by clients so that they do not have to download every
32376 known descriptor before building circuits.
32378 o Major bugfixes (on 0.2.0.x and before):
32379 - When sending CREATED cells back for a given circuit, use a 64-bit
32380 connection ID to find the right connection, rather than an addr:port
32381 combination. Now that we can have multiple OR connections between
32382 the same ORs, it is no longer possible to use addr:port to uniquely
32383 identify a connection.
32384 - Relays now reject risky extend cells: if the extend cell includes
32385 a digest of all zeroes, or asks to extend back to the relay that
32386 sent the extend cell, tear down the circuit. Ideas suggested
32388 - If not enough of our entry guards are available so we add a new
32389 one, we might use the new one even if it overlapped with the
32390 current circuit's exit relay (or its family). Anonymity bugfix
32391 pointed out by rovv.
32394 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32395 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32396 - When using the TransPort option on OpenBSD, and using the User
32397 option to change UID and drop privileges, make sure to open /dev/pf
32398 before dropping privileges. Fixes bug 782. Patch from Christopher
32399 Davis. Bugfix on 0.1.2.1-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 - Add a missing safe_str() call for a debug log message.
32403 - Use 64 bits instead of 32 bits for connection identifiers used with
32404 the controller protocol, to greatly reduce risk of identifier reuse.
32405 - Make the autoconf script accept the obsolete --with-ssl-dir
32406 option as an alias for the actually-working --with-openssl-dir
32407 option. Fix the help documentation to recommend --with-openssl-dir.
32408 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32411 - Rate-limit too-many-sockets messages: when they happen, they happen
32412 a lot. Resolves bug 748.
32413 - Resist DNS poisoning a little better by making sure that names in
32414 answer sections match.
32415 - Print the SOCKS5 error message string as well as the error code
32416 when a tor-resolve request fails. Patch from Jacob.
32419 Changes in version 0.2.1.4-alpha - 2008-08-04
32420 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32423 - The address part of exit policies was not correctly written
32424 to router descriptors. This generated router descriptors that failed
32425 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32427 - Tor triggered a false assert when extending a circuit to a relay
32428 but we already have a connection open to that relay. Noticed by
32429 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32432 - Fix a hidden service logging bug: in some edge cases, the router
32433 descriptor of a previously picked introduction point becomes
32434 obsolete and we need to give up on it rather than continually
32435 complaining that it has become obsolete. Observed by xiando. Bugfix
32438 o Removed features:
32439 - Take out the TestVia config option, since it was a workaround for
32440 a bug that was fixed in Tor 0.1.1.21.
32443 Changes in version 0.2.1.3-alpha - 2008-08-03
32444 Tor 0.2.1.3-alpha implements most of the pieces to prevent
32445 infinite-length circuit attacks (see proposal 110); fixes a bug that
32446 might cause exit relays to corrupt streams they send back; allows
32447 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
32448 ExcludeExitNodes config options; and fixes a big pile of bugs.
32450 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32451 - Send a bootstrap problem "warn" event on the first problem if the
32452 reason is NO_ROUTE (that is, our network is down).
32455 - Implement most of proposal 110: The first K cells to be sent
32456 along a circuit are marked as special "early" cells; only K "early"
32457 cells will be allowed. Once this code is universal, we can block
32458 certain kinds of DOS attack by requiring that EXTEND commands must
32459 be sent using an "early" cell.
32462 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32463 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32464 on the client side when connecting to a hidden service. Bugfix
32465 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32466 - Ensure that two circuits can never exist on the same connection
32467 with the same circuit ID, even if one is marked for close. This
32468 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
32471 - When relays do their initial bandwidth measurement, don't limit
32472 to just our entry guards for the test circuits. Otherwise we tend
32473 to have multiple test circuits going through a single entry guard,
32474 which makes our bandwidth test less accurate. Fixes part of bug 654;
32475 patch contributed by Josh Albrecht.
32476 - Add an ExcludeExitNodes option so users can list a set of nodes
32477 that should be be excluded from the exit node position, but
32478 allowed elsewhere. Implements proposal 151.
32479 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
32480 ExcludeNodes and ExcludeExitNodes lists.
32481 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
32482 be more efficient. Formerly it was quadratic in the number of
32483 servers; now it should be linear. Fixes bug 509.
32484 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
32485 and n_conn_id_digest fields into a separate structure that's
32486 only needed when the circuit has not yet attached to an n_conn.
32489 - Change the contrib/tor.logrotate script so it makes the new
32490 logs as "_tor:_tor" rather than the default, which is generally
32491 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
32492 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32493 warnings (occasionally), but it can also cause the compiler to
32494 eliminate error-checking code. Suggested by Peter Gutmann.
32495 - When a hidden service is giving up on an introduction point candidate
32496 that was not included in the last published rendezvous descriptor,
32497 don't reschedule publication of the next descriptor. Fixes bug 763.
32499 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
32500 HiddenServiceExcludeNodes as obsolete: they never worked properly,
32501 and nobody claims to be using them. Fixes bug 754. Bugfix on
32502 0.1.0.1-rc. Patch from Christian Wilms.
32503 - Fix a small alignment and memory-wasting bug on buffer chunks.
32506 o Minor bugfixes (controller):
32507 - When closing an application-side connection because its circuit
32508 is getting torn down, generate the stream event correctly.
32509 Bugfix on 0.1.2.x. Anonymous patch.
32511 o Removed features:
32512 - Remove all backward-compatibility code to support relays running
32513 versions of Tor so old that they no longer work at all on the
32517 Changes in version 0.2.0.30 - 2008-07-15
32519 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32520 warnings (occasionally), but it can also cause the compiler to
32521 eliminate error-checking code. Suggested by Peter Gutmann.
32524 Changes in version 0.2.0.29-rc - 2008-07-08
32525 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
32526 hidden-service performance bugs, and fixes a bunch of smaller bugs.
32529 - If you have more than one bridge but don't know their keys,
32530 you would only launch a request for the descriptor of the first one
32531 on your list. (Tor considered launching requests for the others, but
32532 found that it already had a connection on the way for $0000...0000
32533 so it didn't open another.) Bugfix on 0.2.0.x.
32534 - If you have more than one bridge but don't know their keys, and the
32535 connection to one of the bridges failed, you would cancel all
32536 pending bridge connections. (After all, they all have the same
32537 digest.) Bugfix on 0.2.0.x.
32538 - When a hidden service was trying to establish an introduction point,
32539 and Tor had built circuits preemptively for such purposes, we
32540 were ignoring all the preemptive circuits and launching a new one
32541 instead. Bugfix on 0.2.0.14-alpha.
32542 - When a hidden service was trying to establish an introduction point,
32543 and Tor *did* manage to reuse one of the preemptively built
32544 circuits, it didn't correctly remember which one it used,
32545 so it asked for another one soon after, until there were no
32546 more preemptive circuits, at which point it launched one from
32547 scratch. Bugfix on 0.0.9.x.
32548 - Make directory servers include the X-Your-Address-Is: http header in
32549 their responses even for begin_dir conns. Now clients who only
32550 ever use begin_dir connections still have a way to learn their IP
32551 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
32554 - Fix a macro/CPP interaction that was confusing some compilers:
32555 some GCCs don't like #if/#endif pairs inside macro arguments.
32557 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
32558 Fixes bug 704; fix from Steven Murdoch.
32559 - When opening /dev/null in finish_daemonize(), do not pass the
32560 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
32561 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
32562 - Correctly detect transparent proxy support on Linux hosts that
32563 require in.h to be included before netfilter_ipv4.h. Patch
32565 - Disallow session resumption attempts during the renegotiation
32566 stage of the v2 handshake protocol. Clients should never be trying
32567 session resumption at this point, but apparently some did, in
32568 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32569 found by Geoff Goodell.
32572 Changes in version 0.2.1.2-alpha - 2008-06-20
32573 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32574 make it easier to set up your own private Tor network; fixes several
32575 big bugs with using more than one bridge relay; fixes a big bug with
32576 offering hidden services quickly after Tor starts; and uses a better
32577 API for reporting potential bootstrapping problems to the controller.
32580 - New TestingTorNetwork config option to allow adjustment of
32581 previously constant values that, while reasonable, could slow
32582 bootstrapping. Implements proposal 135. Patch from Karsten.
32585 - If you have more than one bridge but don't know their digests,
32586 you would only learn a request for the descriptor of the first one
32587 on your list. (Tor considered launching requests for the others, but
32588 found that it already had a connection on the way for $0000...0000
32589 so it didn't open another.) Bugfix on 0.2.0.x.
32590 - If you have more than one bridge but don't know their digests,
32591 and the connection to one of the bridges failed, you would cancel
32592 all pending bridge connections. (After all, they all have the
32593 same digest.) Bugfix on 0.2.0.x.
32594 - When establishing a hidden service, introduction points that
32595 originate from cannibalized circuits are completely ignored and not
32596 included in rendezvous service descriptors. This might be another
32597 reason for delay in making a hidden service available. Bugfix
32598 from long ago (0.0.9.x?)
32601 - Allow OpenSSL to use dynamic locks if it wants.
32602 - When building a consensus, do not include routers that are down.
32603 This will cut down 30% to 40% on consensus size. Implements
32605 - In directory authorities' approved-routers files, allow
32606 fingerprints with or without space.
32607 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
32608 controller can query our current bootstrap state in case it attaches
32609 partway through and wants to catch up.
32610 - Send an initial "Starting" bootstrap status event, so we have a
32611 state to start out in.
32614 - Asking for a conditional consensus at .../consensus/<fingerprints>
32615 would crash a dirserver if it did not already have a
32616 consensus. Bugfix on 0.2.1.1-alpha.
32617 - Clean up some macro/CPP interactions: some GCC versions don't like
32618 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
32621 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
32622 - Directory authorities shouldn't complain about bootstrapping
32623 problems just because they do a lot of reachability testing and
32624 some of the connection attempts fail.
32625 - Start sending "count" and "recommendation" key/value pairs in
32626 bootstrap problem status events, so the controller can hear about
32627 problems even before Tor decides they're worth reporting for sure.
32628 - If you're using bridges, generate "bootstrap problem" warnings
32629 as soon as you run out of working bridges, rather than waiting
32630 for ten failures -- which will never happen if you have less than
32632 - If we close our OR connection because there's been a circuit
32633 pending on it for too long, we were telling our bootstrap status
32634 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
32637 Changes in version 0.2.1.1-alpha - 2008-06-13
32638 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
32639 were making the Tor process bloat especially on Linux; makes our TLS
32640 handshake blend in better; sends "bootstrap phase" status events to
32641 the controller, so it can keep the user informed of progress (and
32642 problems) fetching directory information and establishing circuits;
32643 and adds a variety of smaller features.
32646 - More work on making our TLS handshake blend in: modify the list
32647 of ciphers advertised by OpenSSL in client mode to even more
32648 closely resemble a common web browser. We cheat a little so that
32649 we can advertise ciphers that the locally installed OpenSSL doesn't
32651 - Start sending "bootstrap phase" status events to the controller,
32652 so it can keep the user informed of progress fetching directory
32653 information and establishing circuits. Also inform the controller
32654 if we think we're stuck at a particular bootstrap phase. Implements
32656 - Resume using OpenSSL's RAND_poll() for better (and more portable)
32657 cross-platform entropy collection again. We used to use it, then
32658 stopped using it because of a bug that could crash systems that
32659 called RAND_poll when they had a lot of fds open. It looks like the
32660 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
32661 at startup, and to call RAND_poll() when we reseed later only if
32662 we have a non-buggy OpenSSL version.
32665 - When we choose to abandon a new entry guard because we think our
32666 older ones might be better, close any circuits pending on that
32667 new entry guard connection. This fix should make us recover much
32668 faster when our network is down and then comes back. Bugfix on
32669 0.1.2.8-beta; found by lodger.
32671 o Memory fixes and improvements:
32672 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
32673 to avoid unused RAM in buffer chunks and memory pools.
32674 - Speed up parsing and cut down on memory fragmentation by using
32675 stack-style allocations for parsing directory objects. Previously,
32676 this accounted for over 40% of allocations from within Tor's code
32677 on a typical directory cache.
32678 - Use a Bloom filter rather than a digest-based set to track which
32679 descriptors we need to keep around when we're cleaning out old
32680 router descriptors. This speeds up the computation significantly,
32681 and may reduce fragmentation.
32682 - Reduce the default smartlist size from 32 to 16; it turns out that
32683 most smartlists hold around 8-12 elements tops.
32684 - Make dumpstats() log the fullness and size of openssl-internal
32686 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
32687 patch to their OpenSSL, turn it on to save memory on servers. This
32688 patch will (with any luck) get included in a mainline distribution
32690 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32691 compress cells, which are basically all encrypted, compressed,
32695 - Stop reloading the router list from disk for no reason when we
32696 run out of reachable directory mirrors. Once upon a time reloading
32697 it would set the 'is_running' flag back to 1 for them. It hasn't
32698 done that for a long time.
32699 - In very rare situations new hidden service descriptors were
32700 published earlier than 30 seconds after the last change to the
32701 service. (We currently think that a hidden service descriptor
32702 that's been stable for 30 seconds is worth publishing.)
32705 - Allow separate log levels to be configured for different logging
32706 domains. For example, this allows one to log all notices, warnings,
32707 or errors, plus all memory management messages of level debug or
32708 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
32709 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
32710 and stop using a warning that had become unfixably verbose under
32712 - New --hush command-line option similar to --quiet. While --quiet
32713 disables all logging to the console on startup, --hush limits the
32714 output to messages of warning and error severity.
32715 - Servers support a new URL scheme for consensus downloads that
32716 allows the client to specify which authorities are trusted.
32717 The server then only sends the consensus if the client will trust
32718 it. Otherwise a 404 error is sent back. Clients use this
32719 new scheme when the server supports it (meaning it's running
32720 0.2.1.1-alpha or later). Implements proposal 134.
32721 - New configure/torrc options (--enable-geoip-stats,
32722 DirRecordUsageByCountry) to record how many IPs we've served
32723 directory info to in each country code, how many status documents
32724 total we've sent to each country code, and what share of the total
32725 directory requests we should expect to see.
32726 - Use the TLS1 hostname extension to more closely resemble browser
32728 - Lots of new unit tests.
32729 - Add a macro to implement the common pattern of iterating through
32730 two parallel lists in lockstep.
32733 Changes in version 0.2.0.28-rc - 2008-06-13
32734 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
32735 performance bug, and fixes a bunch of smaller bugs.
32738 - Fix a bug where, when we were choosing the 'end stream reason' to
32739 put in our relay end cell that we send to the exit relay, Tor
32740 clients on Windows were sometimes sending the wrong 'reason'. The
32741 anonymity problem is that exit relays may be able to guess whether
32742 the client is running Windows, thus helping partition the anonymity
32743 set. Down the road we should stop sending reasons to exit relays,
32744 or otherwise prevent future versions of this bug.
32747 - While setting up a hidden service, some valid introduction circuits
32748 were overlooked and abandoned. This might be the reason for
32749 the long delay in making a hidden service available. Bugfix on
32753 - Update to the "June 9 2008" ip-to-country file.
32754 - Run 'make test' as part of 'make dist', so we stop releasing so
32755 many development snapshots that fail their unit tests.
32758 - When we're checking if we have enough dir info for each relay
32759 to begin establishing circuits, make sure that we actually have
32760 the descriptor listed in the consensus, not just any descriptor.
32762 - Bridge relays no longer print "xx=0" in their extrainfo document
32763 for every single country code in the geoip db. Bugfix on
32765 - Only warn when we fail to load the geoip file if we were planning to
32766 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
32767 - If we change our MaxAdvertisedBandwidth and then reload torrc,
32768 Tor won't realize it should publish a new relay descriptor. Fixes
32769 bug 688, reported by mfr. Bugfix on 0.1.2.x.
32770 - When we haven't had any application requests lately, don't bother
32771 logging that we have expired a bunch of descriptors. Bugfix
32773 - Make relay cells written on a connection count as non-padding when
32774 tracking how long a connection has been in use. Bugfix on
32775 0.2.0.1-alpha. Spotted by lodger.
32776 - Fix unit tests in 0.2.0.27-rc.
32777 - Fix compile on Windows.
32780 Changes in version 0.2.0.27-rc - 2008-06-03
32781 Tor 0.2.0.27-rc adds a few features we left out of the earlier
32782 release candidates. In particular, we now include an IP-to-country
32783 GeoIP database, so controllers can easily look up what country a
32784 given relay is in, and so bridge relays can give us some sanitized
32785 summaries about which countries are making use of bridges. (See proposal
32786 126-geoip-fetching.txt for details.)
32789 - Include an IP-to-country GeoIP file in the tarball, so bridge
32790 relays can report sanitized summaries of the usage they're seeing.
32793 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
32794 Robert Hogan. Fixes the first part of bug 681.
32795 - Make bridge authorities never serve extrainfo docs.
32796 - Add support to detect Libevent versions in the 1.4.x series
32798 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
32799 - Include a new contrib/tor-exit-notice.html file that exit relay
32800 operators can put on their website to help reduce abuse queries.
32803 - When tunneling an encrypted directory connection, and its first
32804 circuit fails, do not leave it unattached and ask the controller
32805 to deal. Fixes the second part of bug 681.
32806 - Make bridge authorities correctly expire old extrainfo documents
32810 Changes in version 0.2.0.26-rc - 2008-05-13
32811 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
32812 in Debian's OpenSSL packages. All users running any 0.2.0.x version
32813 should upgrade, whether they're running Debian or not.
32815 o Major security fixes:
32816 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32817 moria1 V3 directory authorities. The old keys were generated with
32818 a vulnerable version of Debian's OpenSSL package, and must be
32819 considered compromised. Other authorities' keys were not generated
32820 with an affected version of OpenSSL.
32823 - List authority signatures as "unrecognized" based on DirServer
32824 lines, not on cert cache. Bugfix on 0.2.0.x.
32827 - Add a new V3AuthUseLegacyKey option to make it easier for
32828 authorities to change their identity keys if they have to.
32831 Changes in version 0.2.0.25-rc - 2008-04-23
32832 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
32835 - Remember to initialize threading before initializing logging.
32836 Otherwise, many BSD-family implementations will crash hard on
32837 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
32840 - Authorities correctly free policies on bad servers on
32841 exit. Fixes bug 672. Bugfix on 0.2.0.x.
32844 Changes in version 0.2.0.24-rc - 2008-04-22
32845 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
32846 v3 directory authority, makes relays with dynamic IP addresses and no
32847 DirPort notice more quickly when their IP address changes, fixes a few
32848 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
32850 o New directory authorities:
32851 - Take lefkada out of the list of v3 directory authorities, since
32852 it has been down for months.
32853 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
32857 - Detect address changes more quickly on non-directory mirror
32858 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
32860 o Minor features (security):
32861 - Reject requests for reverse-dns lookup of names that are in
32862 a private address space. Patch from lodger.
32863 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
32866 o Minor bugfixes (crashes):
32867 - Avoid a rare assert that can trigger when Tor doesn't have much
32868 directory information yet and it tries to fetch a v2 hidden
32869 service descriptor. Fixes bug 651, reported by nwf.
32870 - Initialize log mutex before initializing dmalloc. Otherwise,
32871 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
32872 - Use recursive pthread mutexes in order to avoid deadlock when
32873 logging debug-level messages to a controller. Bug spotted by nwf,
32874 bugfix on 0.2.0.16-alpha.
32876 o Minor bugfixes (resource management):
32877 - Keep address policies from leaking memory: start their refcount
32878 at 1, not 2. Bugfix on 0.2.0.16-alpha.
32879 - Free authority certificates on exit, so they don't look like memory
32880 leaks. Bugfix on 0.2.0.19-alpha.
32881 - Free static hashtables for policy maps and for TLS connections on
32882 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
32883 - Avoid allocating extra space when computing consensuses on 64-bit
32884 platforms. Bug spotted by aakova.
32886 o Minor bugfixes (misc):
32887 - Do not read the configuration file when we've only been told to
32888 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
32889 based on patch from Sebastian Hahn.
32890 - Exit relays that are used as a client can now reach themselves
32891 using the .exit notation, rather than just launching an infinite
32892 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
32893 - When attempting to open a logfile fails, tell us why.
32894 - Fix a dumb bug that was preventing us from knowing that we should
32895 preemptively build circuits to handle expected directory requests.
32896 Fixes bug 660. Bugfix on 0.1.2.x.
32897 - Warn less verbosely about clock skew from netinfo cells from
32898 untrusted sources. Fixes bug 663.
32899 - Make controller stream events for DNS requests more consistent,
32900 by adding "new stream" events for DNS requests, and removing
32901 spurious "stream closed" events" for cached reverse resolves.
32902 Patch from mwenge. Fixes bug 646.
32903 - Correctly notify one-hop connections when a circuit build has
32904 failed. Possible fix for bug 669. Found by lodger.
32907 Changes in version 0.2.0.23-rc - 2008-03-24
32908 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
32909 makes bootstrapping faster if the first directory mirror you contact
32910 is down. The bundles also include the new Vidalia 0.1.2 release.
32913 - When a tunneled directory request is made to a directory server
32914 that's down, notice after 30 seconds rather than 120 seconds. Also,
32915 fail any begindir streams that are pending on it, so they can
32916 retry elsewhere. This was causing multi-minute delays on bootstrap.
32919 Changes in version 0.2.0.22-rc - 2008-03-18
32920 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
32921 enables encrypted directory connections by default for non-relays, fixes
32922 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
32923 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
32926 - Enable encrypted directory connections by default for non-relays,
32927 so censor tools that block Tor directory connections based on their
32928 plaintext patterns will no longer work. This means Tor works in
32929 certain censored countries by default again.
32932 - Make sure servers always request certificates from clients during
32933 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
32934 - Do not enter a CPU-eating loop when a connection is closed in
32935 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
32936 diagnosed by lodger; bugfix on 0.2.0.20-rc.
32937 - Fix assertion failure that could occur when a blocked circuit
32938 became unblocked, and it had pending client DNS requests. Bugfix
32939 on 0.2.0.1-alpha. Fixes bug 632.
32941 o Minor bugfixes (on 0.1.2.x):
32942 - Generate "STATUS_SERVER" events rather than misspelled
32943 "STATUS_SEVER" events. Caught by mwenge.
32944 - When counting the number of bytes written on a TLS connection,
32945 look at the BIO actually used for writing to the network, not
32946 at the BIO used (sometimes) to buffer data for the network.
32947 Looking at different BIOs could result in write counts on the
32948 order of ULONG_MAX. Fixes bug 614.
32949 - On Windows, correctly detect errors when listing the contents of
32950 a directory. Fix from lodger.
32952 o Minor bugfixes (on 0.2.0.x):
32953 - Downgrade "sslv3 alert handshake failure" message to INFO.
32954 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
32955 left BandwidthRate and BandwidthBurst at the default, we would be
32956 silently limited by those defaults. Now raise them to match the
32957 RelayBandwidth* values.
32958 - Fix the SVK version detection logic to work correctly on a branch.
32959 - Make --enable-openbsd-malloc work correctly on Linux with alpha
32960 CPUs. Fixes bug 625.
32961 - Logging functions now check that the passed severity is sane.
32962 - Use proper log levels in the testsuite call of
32963 get_interface_address6().
32964 - When using a nonstandard malloc, do not use the platform values for
32965 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
32966 - Make the openbsd malloc code use 8k pages on alpha CPUs and
32968 - Detect mismatched page sizes when using --enable-openbsd-malloc.
32969 - Avoid double-marked-for-close warning when certain kinds of invalid
32970 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
32971 for bug 617. Bugfix on 0.2.0.1-alpha.
32972 - Make sure that the "NULL-means-reject *:*" convention is followed by
32973 all the policy manipulation functions, avoiding some possible crash
32974 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
32975 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
32976 actually works, and doesn't warn about every single reverse lookup.
32977 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
32980 - Only log guard node status when guard node status has changed.
32981 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
32982 make "INFO" 75% less verbose.
32985 Changes in version 0.2.0.21-rc - 2008-03-02
32986 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
32987 makes Tor work well with Vidalia again, fixes a rare assert bug,
32988 and fixes a pair of more minor bugs. The bundles also include Vidalia
32989 0.1.0 and Torbutton 1.1.16.
32992 - The control port should declare that it requires password auth
32993 when HashedControlSessionPassword is set too. Patch from Matt Edman;
32994 bugfix on 0.2.0.20-rc. Fixes bug 615.
32995 - Downgrade assert in connection_buckets_decrement() to a log message.
32996 This may help us solve bug 614, and in any case will make its
32997 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
32998 - We were sometimes miscounting the number of bytes read from the
32999 network, causing our rate limiting to not be followed exactly.
33000 Bugfix on 0.2.0.16-alpha. Reported by lodger.
33003 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
33004 OpenSSL versions should have been working fine. Diagnosis and patch
33005 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
33006 Bugfix on 0.2.0.20-rc.
33009 Changes in version 0.2.0.20-rc - 2008-02-24
33010 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
33011 makes more progress towards normalizing Tor's TLS handshake, makes
33012 hidden services work better again, helps relays bootstrap if they don't
33013 know their IP address, adds optional support for linking in openbsd's
33014 allocator or tcmalloc, allows really fast relays to scale past 15000
33015 sockets, and fixes a bunch of minor bugs reported by Veracode.
33018 - Enable the revised TLS handshake based on the one designed by
33019 Steven Murdoch in proposal 124, as revised in proposal 130. It
33020 includes version negotiation for OR connections as described in
33021 proposal 105. The new handshake is meant to be harder for censors
33022 to fingerprint, and it adds the ability to detect certain kinds of
33023 man-in-the-middle traffic analysis attacks. The version negotiation
33024 feature will allow us to improve Tor's link protocol more safely
33026 - Choose which bridge to use proportional to its advertised bandwidth,
33027 rather than uniformly at random. This should speed up Tor for
33028 bridge users. Also do this for people who set StrictEntryNodes.
33029 - When a TrackHostExits-chosen exit fails too many times in a row,
33030 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
33033 - Resolved problems with (re-)fetching hidden service descriptors.
33034 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
33035 and 0.2.0.19-alpha.
33036 - If we only ever used Tor for hidden service lookups or posts, we
33037 would stop building circuits and start refusing connections after
33038 24 hours, since we falsely believed that Tor was dormant. Reported
33039 by nwf; bugfix on 0.1.2.x.
33040 - Servers that don't know their own IP address should go to the
33041 authorities for their first directory fetch, even if their DirPort
33042 is off or if they don't know they're reachable yet. This will help
33043 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
33044 - When counting the number of open sockets, count not only the number
33045 of sockets we have received from the socket() call, but also
33046 the number we've gotten from accept() and socketpair(). This bug
33047 made us fail to count all sockets that we were using for incoming
33048 connections. Bugfix on 0.2.0.x.
33049 - Fix code used to find strings within buffers, when those strings
33050 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
33051 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
33052 - Add a new __HashedControlSessionPassword option for controllers
33053 to use for one-off session password hashes that shouldn't get
33054 saved to disk by SAVECONF --- Vidalia users were accumulating a
33055 pile of HashedControlPassword lines in their torrc files, one for
33056 each time they had restarted Tor and then clicked Save. Make Tor
33057 automatically convert "HashedControlPassword" to this new option but
33058 only when it's given on the command line. Partial fix for bug 586.
33060 o Minor features (performance):
33061 - Tune parameters for cell pool allocation to minimize amount of
33063 - Add OpenBSD malloc code from phk as an optional malloc
33064 replacement on Linux: some glibc libraries do very poorly
33065 with Tor's memory allocation patterns. Pass
33066 --enable-openbsd-malloc to get the replacement malloc code.
33067 - Add a --with-tcmalloc option to the configure script to link
33068 against tcmalloc (if present). Does not yet search for
33069 non-system include paths.
33070 - Stop imposing an arbitrary maximum on the number of file descriptors
33071 used for busy servers. Bug reported by Olaf Selke; patch from
33074 o Minor features (other):
33075 - When SafeLogging is disabled, log addresses along with all TLS
33077 - When building with --enable-gcc-warnings, check for whether Apple's
33078 warning "-Wshorten-64-to-32" is available.
33079 - Add a --passphrase-fd argument to the tor-gencert command for
33082 o Minor bugfixes (memory leaks and code problems):
33083 - We were leaking a file descriptor if Tor started with a zero-length
33084 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
33085 - Detect size overflow in zlib code. Reported by Justin Ferguson and
33087 - We were comparing the raw BridgePassword entry with a base64'ed
33088 version of it, when handling a "/tor/networkstatus-bridges"
33089 directory request. Now compare correctly. Noticed by Veracode.
33090 - Recover from bad tracked-since value in MTBF-history file.
33091 Should fix bug 537.
33092 - Alter the code that tries to recover from unhandled write
33093 errors, to not try to flush onto a socket that's given us
33094 unhandled errors. Bugfix on 0.1.2.x.
33095 - Make Unix controlsockets work correctly on OpenBSD. Patch from
33096 tup. Bugfix on 0.2.0.3-alpha.
33098 o Minor bugfixes (other):
33099 - If we have an extra-info document for our server, always make
33100 it available on the control port, even if we haven't gotten
33101 a copy of it from an authority yet. Patch from mwenge.
33102 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
33103 - Directory mirrors no longer include a guess at the client's IP
33104 address if the connection appears to be coming from the same /24
33105 network; it was producing too many wrong guesses.
33106 - Make the new hidden service code respect the SafeLogging setting.
33107 Bugfix on 0.2.0.x. Patch from Karsten.
33108 - When starting as an authority, do not overwrite all certificates
33109 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
33110 - If we're trying to flush the last bytes on a connection (for
33111 example, when answering a directory request), reset the
33112 time-to-give-up timeout every time we manage to write something
33113 on the socket. Bugfix on 0.1.2.x.
33114 - Change the behavior of "getinfo status/good-server-descriptor"
33115 so it doesn't return failure when any authority disappears.
33116 - Even though the man page said that "TrackHostExits ." should
33117 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
33118 - Report TLS "zero return" case as a "clean close" and "IO error"
33119 as a "close". Stop calling closes "unexpected closes": existing
33120 Tors don't use SSL_close(), so having a connection close without
33121 the TLS shutdown handshake is hardly unexpected.
33122 - Send NAMESERVER_STATUS messages for a single failed nameserver
33125 o Code simplifications and refactoring:
33126 - Remove the tor_strpartition function: its logic was confused,
33127 and it was only used for one thing that could be implemented far
33131 Changes in version 0.2.0.19-alpha - 2008-02-09
33132 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
33133 handshake, makes path selection for relays more secure and IP address
33134 guessing more robust, and generally fixes a lot of bugs in preparation
33135 for calling the 0.2.0 branch stable.
33138 - Do not include recognizeable strings in the commonname part of
33139 Tor's x509 certificates.
33142 - If we're a relay, avoid picking ourselves as an introduction point,
33143 a rendezvous point, or as the final hop for internal circuits. Bug
33144 reported by taranis and lodger. Bugfix on 0.1.2.x.
33145 - Patch from "Andrew S. Lists" to catch when we contact a directory
33146 mirror at IP address X and he says we look like we're coming from
33147 IP address X. Bugfix on 0.1.2.x.
33149 o Minor features (security):
33150 - Be more paranoid about overwriting sensitive memory on free(),
33151 as a defensive programming tactic to ensure forward secrecy.
33153 o Minor features (directory authority):
33154 - Actually validate the options passed to AuthDirReject,
33155 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
33156 - Reject router descriptors with out-of-range bandwidthcapacity or
33157 bandwidthburst values.
33159 o Minor features (controller):
33160 - Reject controller commands over 1MB in length. This keeps rogue
33161 processes from running us out of memory.
33163 o Minor features (misc):
33164 - Give more descriptive well-formedness errors for out-of-range
33165 hidden service descriptor/protocol versions.
33166 - Make memory debugging information describe more about history
33167 of cell allocation, so we can help reduce our memory use.
33169 o Deprecated features (controller):
33170 - The status/version/num-versioning and status/version/num-concurring
33171 GETINFO options are no longer useful in the v3 directory protocol:
33172 treat them as deprecated, and warn when they're used.
33175 - When our consensus networkstatus has been expired for a while, stop
33176 being willing to build circuits using it. Fixes bug 401. Bugfix
33178 - Directory caches now fetch certificates from all authorities
33179 listed in a networkstatus consensus, even when they do not
33180 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
33181 - When connecting to a bridge without specifying its key, insert
33182 the connection into the identity-to-connection map as soon as
33183 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
33184 - Detect versions of OS X where malloc_good_size() is present in the
33185 library but never actually declared. Resolves bug 587. Bugfix
33187 - Stop incorrectly truncating zlib responses to directory authority
33188 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
33189 - Stop recommending that every server operator send mail to tor-ops.
33190 Resolves bug 597. Bugfix on 0.1.2.x.
33191 - Don't trigger an assert if we start a directory authority with a
33192 private IP address (like 127.0.0.1).
33193 - Avoid possible failures when generating a directory with routers
33194 with over-long versions strings, or too many flags set. Bugfix
33196 - If an attempt to launch a DNS resolve request over the control
33197 port fails because we have overrun the limit on the number of
33198 connections, tell the controller that the request has failed.
33199 - Avoid using too little bandwidth when our clock skips a few
33200 seconds. Bugfix on 0.1.2.x.
33201 - Fix shell error when warning about missing packages in configure
33202 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
33203 - Do not become confused when receiving a spurious VERSIONS-like
33204 cell from a confused v1 client. Bugfix on 0.2.0.x.
33205 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
33206 introduction points for a hidden service have failed. Patch from
33207 Karsten Loesing. Bugfix on 0.2.0.x.
33209 o Code simplifications and refactoring:
33210 - Remove some needless generality from cpuworker code, for improved
33212 - Stop overloading the circuit_t.onionskin field for both "onionskin
33213 from a CREATE cell that we are waiting for a cpuworker to be
33214 assigned" and "onionskin from an EXTEND cell that we are going to
33215 send to an OR as soon as we are connected". Might help with bug 600.
33216 - Add an in-place version of aes_crypt() so that we can avoid doing a
33217 needless memcpy() call on each cell payload.
33220 Changes in version 0.2.0.18-alpha - 2008-01-25
33221 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
33222 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
33223 that can warn or reject connections to ports generally associated with
33224 vulnerable-plaintext protocols.
33226 o New directory authorities:
33227 - Set up dannenberg (run by CCC) as the sixth v3 directory
33231 - Fix a major memory leak when attempting to use the v2 TLS
33232 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
33233 - We accidentally enabled the under-development v2 TLS handshake
33234 code, which was causing log entries like "TLS error while
33235 renegotiating handshake". Disable it again. Resolves bug 590.
33236 - We were computing the wrong Content-Length: header for directory
33237 responses that need to be compressed on the fly, causing clients
33238 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33242 - Avoid going directly to the directory authorities even if you're a
33243 relay, if you haven't found yourself reachable yet or if you've
33244 decided not to advertise your dirport yet. Addresses bug 556.
33245 - If we've gone 12 hours since our last bandwidth check, and we
33246 estimate we have less than 50KB bandwidth capacity but we could
33247 handle more, do another bandwidth test.
33248 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33249 Tor can warn and/or refuse connections to ports commonly used with
33250 vulnerable-plaintext protocols. Currently we warn on ports 23,
33251 109, 110, and 143, but we don't reject any.
33254 - When we setconf ClientOnly to 1, close any current OR and Dir
33255 listeners. Reported by mwenge.
33256 - When we get a consensus that's been signed by more people than
33257 we expect, don't log about it; it's not a big deal. Reported
33261 - Don't answer "/tor/networkstatus-bridges" directory requests if
33262 the request isn't encrypted.
33263 - Make "ClientOnly 1" config option disable directory ports too.
33264 - Patches from Karsten Loesing to make v2 hidden services more
33265 robust: work even when there aren't enough HSDir relays available;
33266 retry when a v2 rend desc fetch fails; but don't retry if we
33267 already have a usable v0 rend desc.
33270 Changes in version 0.2.0.17-alpha - 2008-01-17
33271 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33274 - Make the tor-gencert man page get included correctly in the tarball.
33277 Changes in version 0.2.0.16-alpha - 2008-01-17
33278 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33279 Loesing, and generally cleans up a lot of features and minor bugs.
33281 o New directory authorities:
33282 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33285 o Major performance improvements:
33286 - Switch our old ring buffer implementation for one more like that
33287 used by free Unix kernels. The wasted space in a buffer with 1mb
33288 of data will now be more like 8k than 1mb. The new implementation
33289 also avoids realloc();realloc(); patterns that can contribute to
33290 memory fragmentation.
33293 - Configuration files now accept C-style strings as values. This
33294 helps encode characters not allowed in the current configuration
33295 file format, such as newline or #. Addresses bug 557.
33296 - Although we fixed bug 539 (where servers would send HTTP status 503
33297 responses _and_ send a body too), there are still servers out
33298 there that haven't upgraded. Therefore, make clients parse such
33299 bodies when they receive them.
33300 - When we're not serving v2 directory information, there is no reason
33301 to actually keep any around. Remove the obsolete files and directory
33302 on startup if they are very old and we aren't going to serve them.
33304 o Minor performance improvements:
33305 - Reference-count and share copies of address policy entries; only 5%
33306 of them were actually distinct.
33307 - Never walk through the list of logs if we know that no log is
33308 interested in a given message.
33311 - When an authority has not signed a consensus, do not try to
33312 download a nonexistent "certificate with key 00000000". Bugfix
33313 on 0.2.0.x. Fixes bug 569.
33314 - Fix a rare assert error when we're closing one of our threads:
33315 use a mutex to protect the list of logs, so we never write to the
33316 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33317 bug 575, which is kind of the revenge of bug 222.
33318 - Patch from Karsten Loesing to complain less at both the client
33319 and the relay when a relay used to have the HSDir flag but doesn't
33320 anymore, and we try to upload a hidden service descriptor.
33321 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33323 - Do not try to download missing certificates until we have tried
33324 to check our fallback consensus. Fixes bug 583.
33325 - Make bridges round reported GeoIP stats info up to the nearest
33326 estimate, not down. Now we can distinguish between "0 people from
33327 this country" and "1 person from this country".
33328 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33329 - Avoid possible segfault if key generation fails in
33330 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33331 - Avoid segfault in the case where a badly behaved v2 versioning
33332 directory sends a signed networkstatus with missing client-versions.
33334 - Avoid segfaults on certain complex invocations of
33335 router_get_by_hexdigest(). Bugfix on 0.1.2.
33336 - Correct bad index on array access in parse_http_time(). Bugfix
33338 - Fix possible bug in vote generation when server versions are present
33339 but client versions are not.
33340 - Fix rare bug on REDIRECTSTREAM control command when called with no
33341 port set: it could erroneously report an error when none had
33343 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33344 compressing large objects and find ourselves with more than 4k
33345 left over. Bugfix on 0.2.0.
33346 - Fix a small memory leak when setting up a hidden service.
33347 - Fix a few memory leaks that could in theory happen under bizarre
33349 - Fix an assert if we post a general-purpose descriptor via the
33350 control port but that descriptor isn't mentioned in our current
33351 network consensus. Bug reported by Jon McLachlan; bugfix on
33354 o Minor features (controller):
33355 - Get NS events working again. Patch from tup.
33356 - The GETCONF command now escapes and quotes configuration values
33357 that don't otherwise fit into the torrc file.
33358 - The SETCONF command now handles quoted values correctly.
33360 o Minor features (directory authorities):
33361 - New configuration options to override default maximum number of
33362 servers allowed on a single IP address. This is important for
33363 running a test network on a single host.
33364 - Actually implement the -s option to tor-gencert.
33365 - Add a manual page for tor-gencert.
33367 o Minor features (bridges):
33368 - Bridge authorities no longer serve bridge descriptors over
33369 unencrypted connections.
33371 o Minor features (other):
33372 - Add hidden services and DNSPorts to the list of things that make
33373 Tor accept that it has running ports. Change starting Tor with no
33374 ports from a fatal error to a warning; we might change it back if
33375 this turns out to confuse anybody. Fixes bug 579.
33378 Changes in version 0.1.2.19 - 2008-01-17
33379 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33380 exit policy a little bit more conservative so it's safer to run an
33381 exit relay on a home system, and fixes a variety of smaller issues.
33384 - Exit policies now reject connections that are addressed to a
33385 relay's public (external) IP address too, unless
33386 ExitPolicyRejectPrivate is turned off. We do this because too
33387 many relays are running nearby to services that trust them based
33388 on network address.
33391 - When the clock jumps forward a lot, do not allow the bandwidth
33392 buckets to become negative. Fixes bug 544.
33393 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33394 on every successful resolve. Reported by Mike Perry.
33395 - Purge old entries from the "rephist" database and the hidden
33396 service descriptor database even when DirPort is zero.
33397 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33398 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33399 crashing or mis-answering these requests.
33400 - When we decide to send a 503 response to a request for servers, do
33401 not then also send the server descriptors: this defeats the whole
33402 purpose. Fixes bug 539.
33405 - Changing the ExitPolicyRejectPrivate setting should cause us to
33406 rebuild our server descriptor.
33407 - Fix handling of hex nicknames when answering controller requests for
33408 networkstatus by name, or when deciding whether to warn about
33409 unknown routers in a config option. (Patch from mwenge.)
33410 - Fix a couple of hard-to-trigger autoconf problems that could result
33411 in really weird results on platforms whose sys/types.h files define
33412 nonstandard integer types.
33413 - Don't try to create the datadir when running --verify-config or
33414 --hash-password. Resolves bug 540.
33415 - If we were having problems getting a particular descriptor from the
33416 directory caches, and then we learned about a new descriptor for
33417 that router, we weren't resetting our failure count. Reported
33419 - Although we fixed bug 539 (where servers would send HTTP status 503
33420 responses _and_ send a body too), there are still servers out there
33421 that haven't upgraded. Therefore, make clients parse such bodies
33422 when they receive them.
33423 - Run correctly on systems where rlim_t is larger than unsigned long.
33424 This includes some 64-bit systems.
33425 - Run correctly on platforms (like some versions of OS X 10.5) where
33426 the real limit for number of open files is OPEN_FILES, not rlim_max
33427 from getrlimit(RLIMIT_NOFILES).
33428 - Avoid a spurious free on base64 failure.
33429 - Avoid segfaults on certain complex invocations of
33430 router_get_by_hexdigest().
33431 - Fix rare bug on REDIRECTSTREAM control command when called with no
33432 port set: it could erroneously report an error when none had
33436 Changes in version 0.2.0.15-alpha - 2007-12-25
33437 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33438 features added in 0.2.0.13-alpha.
33441 - Fix several remotely triggerable asserts based on DirPort requests
33442 for a v2 or v3 networkstatus object before we were prepared. This
33443 was particularly bad for 0.2.0.13 and later bridge relays, who
33444 would never have a v2 networkstatus and would thus always crash
33445 when used. Bugfixes on 0.2.0.x.
33446 - Estimate the v3 networkstatus size more accurately, rather than
33447 estimating it at zero bytes and giving it artificially high priority
33448 compared to other directory requests. Bugfix on 0.2.0.x.
33451 - Fix configure.in logic for cross-compilation.
33452 - When we load a bridge descriptor from the cache, and it was
33453 previously unreachable, mark it as retriable so we won't just
33454 ignore it. Also, try fetching a new copy immediately. Bugfixes
33456 - The bridge GeoIP stats were counting other relays, for example
33457 self-reachability and authority-reachability tests.
33460 - Support compilation to target iPhone; patch from cjacker huang.
33461 To build for iPhone, pass the --enable-iphone option to configure.
33464 Changes in version 0.2.0.14-alpha - 2007-12-23
33466 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
33467 without a datadirectory from a previous Tor install. Reported
33469 - Fix a crash when we fetch a descriptor that turns out to be
33470 unexpected (it used to be in our networkstatus when we started
33471 fetching it, but it isn't in our current networkstatus), and we
33472 aren't using bridges. Bugfix on 0.2.0.x.
33473 - Fix a crash when accessing hidden services: it would work the first
33474 time you use a given introduction point for your service, but
33475 on subsequent requests we'd be using garbage memory. Fixed by
33476 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
33477 - Fix a crash when we load a bridge descriptor from disk but we don't
33478 currently have a Bridge line for it in our torrc. Bugfix on
33482 - If bridge authorities set BridgePassword, they will serve a
33483 snapshot of known bridge routerstatuses from their DirPort to
33484 anybody who knows that password. Unset by default.
33487 - Make the unit tests build again.
33488 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
33489 - Make PublishServerDescriptor default to 1, so the default doesn't
33490 have to change as we invent new directory protocol versions.
33491 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
33492 be included unless sys/time.h is already included. Fixes
33493 bug 553. Bugfix on 0.2.0.x.
33494 - If we receive a general-purpose descriptor and then receive an
33495 identical bridge-purpose descriptor soon after, don't discard
33496 the next one as a duplicate.
33499 - If BridgeRelay is set to 1, then the default for
33500 PublishServerDescriptor is now "bridge" rather than "v2,v3".
33501 - If the user sets RelayBandwidthRate but doesn't set
33502 RelayBandwidthBurst, then make them equal rather than erroring out.
33505 Changes in version 0.2.0.13-alpha - 2007-12-21
33506 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
33507 Goodell, fixes many more bugs, and adds a lot of infrastructure for
33510 o New directory authorities:
33511 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
33515 - Only update guard status (usable / not usable) once we have
33516 enough directory information. This was causing us to always pick
33517 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
33518 causing us to discard all our guards on startup if we hadn't been
33519 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
33520 - Purge old entries from the "rephist" database and the hidden
33521 service descriptor databases even when DirPort is zero. Bugfix
33523 - We were ignoring our RelayBandwidthRate for the first 30 seconds
33524 after opening a circuit -- even a relayed circuit. Bugfix on
33526 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33527 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33528 crashing or mis-answering these types of requests.
33529 - Relays were publishing their server descriptor to v1 and v2
33530 directory authorities, but they didn't try publishing to v3-only
33531 authorities. Fix this; and also stop publishing to v1 authorities.
33533 - When we were reading router descriptors from cache, we were ignoring
33534 the annotations -- so for example we were reading in bridge-purpose
33535 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
33536 - When we decided to send a 503 response to a request for servers, we
33537 were then also sending the server descriptors: this defeats the
33538 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
33541 - Bridge relays now behave like clients with respect to time
33542 intervals for downloading new consensus documents -- otherwise they
33543 stand out. Bridge users now wait until the end of the interval,
33544 so their bridge relay will be sure to have a new consensus document.
33545 - Three new config options (AlternateDirAuthority,
33546 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
33547 user selectively replace the default directory authorities by type,
33548 rather than the all-or-nothing replacement that DirServer offers.
33549 - Tor can now be configured to read a GeoIP file from disk in one
33550 of two formats. This can be used by controllers to map IP addresses
33551 to countries. Eventually, it may support exit-by-country.
33552 - When possible, bridge relays remember which countries users
33553 are coming from, and report aggregate information in their
33554 extra-info documents, so that the bridge authorities can learn
33555 where Tor is blocked.
33556 - Bridge directory authorities now do reachability testing on the
33557 bridges they know. They provide router status summaries to the
33558 controller via "getinfo ns/purpose/bridge", and also dump summaries
33559 to a file periodically.
33560 - Stop fetching directory info so aggressively if your DirPort is
33561 on but your ORPort is off; stop fetching v2 dir info entirely.
33562 You can override these choices with the new FetchDirInfoEarly
33566 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33567 consensus documents when there are too many relays at a single
33568 IP address. Now clear it in v2 network status documents too, and
33569 also clear it in routerinfo_t when the relay is no longer listed
33570 in the relevant networkstatus document.
33571 - Don't crash if we get an unexpected value for the
33572 PublishServerDescriptor config option. Reported by Matt Edman;
33573 bugfix on 0.2.0.9-alpha.
33574 - Our new v2 hidden service descriptor format allows descriptors
33575 that have no introduction points. But Tor crashed when we tried
33576 to build a descriptor with no intro points (and it would have
33577 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33578 by Karsten Loesing.
33579 - Fix building with dmalloc 5.5.2 with glibc.
33580 - Reject uploaded descriptors and extrainfo documents if they're
33581 huge. Otherwise we'll cache them all over the network and it'll
33582 clog everything up. Reported by Aljosha Judmayer.
33583 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
33584 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
33585 - When the DANGEROUS_VERSION controller status event told us we're
33586 running an obsolete version, it used the string "OLD" to describe
33587 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
33588 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
33589 - If we can't expand our list of entry guards (e.g. because we're
33590 using bridges or we have StrictEntryNodes set), don't mark relays
33591 down when they fail a directory request. Otherwise we're too quick
33592 to mark all our entry points down. Bugfix on 0.1.2.x.
33593 - Fix handling of hex nicknames when answering controller requests for
33594 networkstatus by name, or when deciding whether to warn about unknown
33595 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
33596 - Fix a couple of hard-to-trigger autoconf problems that could result
33597 in really weird results on platforms whose sys/types.h files define
33598 nonstandard integer types. Bugfix on 0.1.2.x.
33599 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
33600 - Don't crash on name lookup when we have no current consensus. Fixes
33601 bug 538; bugfix on 0.2.0.x.
33602 - Only Tors that want to mirror the v2 directory info should
33603 create the "cached-status" directory in their datadir. (All Tors
33604 used to create it.) Bugfix on 0.2.0.9-alpha.
33605 - Directory authorities should only automatically download Extra Info
33606 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
33609 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
33610 consumers. (We already do this on HUP.)
33611 - Authorities and caches fetch the v2 networkstatus documents
33612 less often, now that v3 is encouraged.
33613 - Add a new config option BridgeRelay that specifies you want to
33614 be a bridge relay. Right now the only difference is that it makes
33615 you answer begin_dir requests, and it makes you cache dir info,
33616 even if your DirPort isn't on.
33617 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
33618 ask about source, timestamp of arrival, purpose, etc. We need
33619 something like this to help Vidalia not do GeoIP lookups on bridge
33621 - Allow multiple HashedControlPassword config lines, to support
33622 multiple controller passwords.
33623 - Authorities now decide whether they're authoritative for a given
33624 router based on the router's purpose.
33625 - New config options AuthDirBadDir and AuthDirListBadDirs for
33626 authorities to mark certain relays as "bad directories" in the
33627 networkstatus documents. Also supports the "!baddir" directive in
33628 the approved-routers file.
33631 Changes in version 0.2.0.12-alpha - 2007-11-16
33632 This twelfth development snapshot fixes some more build problems as
33633 well as a few minor bugs.
33636 - Make it build on OpenBSD again. Patch from tup.
33637 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
33638 package-building for Red Hat, OS X, etc.
33640 o Minor bugfixes (on 0.1.2.x):
33641 - Changing the ExitPolicyRejectPrivate setting should cause us to
33642 rebuild our server descriptor.
33644 o Minor bugfixes (on 0.2.0.x):
33645 - When we're lacking a consensus, don't try to perform rendezvous
33646 operations. Reported by Karsten Loesing.
33647 - Fix a small memory leak whenever we decide against using a
33648 newly picked entry guard. Reported by Mike Perry.
33649 - When authorities detected more than two relays running on the same
33650 IP address, they were clearing all the status flags but forgetting
33651 to clear the "hsdir" flag. So clients were being told that a
33652 given relay was the right choice for a v2 hsdir lookup, yet they
33653 never had its descriptor because it was marked as 'not running'
33655 - If we're trying to fetch a bridge descriptor and there's no way
33656 the bridge authority could help us (for example, we don't know
33657 a digest, or there is no bridge authority), don't be so eager to
33658 fall back to asking the bridge authority.
33659 - If we're using bridges or have strictentrynodes set, and our
33660 chosen exit is in the same family as all our bridges/entry guards,
33661 then be flexible about families.
33664 - When we negotiate a v2 link-layer connection (not yet implemented),
33665 accept RELAY_EARLY cells and turn them into RELAY cells if we've
33666 negotiated a v1 connection for their next step. Initial code for
33670 Changes in version 0.2.0.11-alpha - 2007-11-12
33671 This eleventh development snapshot fixes some build problems with
33672 the previous snapshot. It also includes a more secure-by-default exit
33673 policy for relays, fixes an enormous memory leak for exit relays, and
33674 fixes another bug where servers were falling out of the directory list.
33677 - Exit policies now reject connections that are addressed to a
33678 relay's public (external) IP address too, unless
33679 ExitPolicyRejectPrivate is turned off. We do this because too
33680 many relays are running nearby to services that trust them based
33681 on network address. Bugfix on 0.1.2.x.
33684 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33685 on every successful resolve. Reported by Mike Perry; bugfix
33687 - On authorities, never downgrade to old router descriptors simply
33688 because they're listed in the consensus. This created a catch-22
33689 where we wouldn't list a new descriptor because there was an
33690 old one in the consensus, and we couldn't get the new one in the
33691 consensus because we wouldn't list it. Possible fix for bug 548.
33692 Also, this might cause bug 543 to appear on authorities; if so,
33693 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
33695 o Packaging fixes on 0.2.0.10-alpha:
33696 - We were including instructions about what to do with the
33697 src/config/fallback-consensus file, but we weren't actually
33698 including it in the tarball. Disable all of that for now.
33701 - Allow people to say PreferTunnelledDirConns rather than
33702 PreferTunneledDirConns, for those alternate-spellers out there.
33705 - Don't reevaluate all the information from our consensus document
33706 just because we've downloaded a v2 networkstatus that we intend
33707 to cache. Fixes bug 545; bugfix on 0.2.0.x.
33710 Changes in version 0.2.0.10-alpha - 2007-11-10
33711 This tenth development snapshot adds a third v3 directory authority
33712 run by Mike Perry, adds most of Karsten Loesing's new hidden service
33713 descriptor format, fixes a bad crash bug and new bridge bugs introduced
33714 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
33715 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
33716 addresses many more minor issues.
33718 o New directory authorities:
33719 - Set up ides (run by Mike Perry) as the third v3 directory authority.
33722 - Allow tunnelled directory connections to ask for an encrypted
33723 "begin_dir" connection or an anonymized "uses a full Tor circuit"
33724 connection independently. Now we can make anonymized begin_dir
33725 connections for (e.g.) more secure hidden service posting and
33727 - More progress on proposal 114: code from Karsten Loesing to
33728 implement new hidden service descriptor format.
33729 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
33730 accommodate the growing number of servers that use the default
33731 and are reaching it.
33732 - Directory authorities use a new formula for selecting which nodes
33733 to advertise as Guards: they must be in the top 7/8 in terms of
33734 how long we have known about them, and above the median of those
33735 nodes in terms of weighted fractional uptime.
33736 - Make "not enough dir info yet" warnings describe *why* Tor feels
33737 it doesn't have enough directory info yet.
33740 - Stop servers from crashing if they set a Family option (or
33741 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
33743 - Make bridge users work again -- the move to v3 directories in
33744 0.2.0.9-alpha had introduced a number of bugs that made bridges
33745 no longer work for clients.
33746 - When the clock jumps forward a lot, do not allow the bandwidth
33747 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
33749 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
33750 - When the consensus lists a router descriptor that we previously were
33751 mirroring, but that we considered non-canonical, reload the
33752 descriptor as canonical. This fixes bug 543 where Tor servers
33753 would start complaining after a few days that they don't have
33754 enough directory information to build a circuit.
33755 - Consider replacing the current consensus when certificates arrive
33756 that make the pending consensus valid. Previously, we were only
33757 considering replacement when the new certs _didn't_ help.
33758 - Fix an assert error on startup if we didn't already have the
33759 consensus and certs cached in our datadirectory: we were caching
33760 the consensus in consensus_waiting_for_certs but then free'ing it
33762 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
33763 Request) if we need more v3 certs but we've already got pending
33764 requests for all of them.
33765 - Correctly back off from failing certificate downloads. Fixes
33767 - Authorities don't vote on the Running flag if they have been running
33768 for less than 30 minutes themselves. Fixes bug 547, where a newly
33769 started authority would vote that everyone was down.
33771 o New requirements:
33772 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
33773 it, it had no AES, and it hasn't seen any security patches since
33777 - Clients now hold circuitless TLS connections open for 1.5 times
33778 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
33779 rebuild a new circuit over them within that timeframe. Previously,
33780 they held them open only for KeepalivePeriod (5 minutes).
33781 - Use "If-Modified-Since" to avoid retrieving consensus
33782 networkstatuses that we already have.
33783 - When we have no consensus, check FallbackNetworkstatusFile (defaults
33784 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
33785 we start knowing some directory caches.
33786 - When we receive a consensus from the future, warn about skew.
33787 - Improve skew reporting: try to give the user a better log message
33788 about how skewed they are, and how much this matters.
33789 - When we have a certificate for an authority, believe that
33790 certificate's claims about the authority's IP address.
33791 - New --quiet command-line option to suppress the default console log.
33792 Good in combination with --hash-password.
33793 - Authorities send back an X-Descriptor-Not-New header in response to
33794 an accepted-but-discarded descriptor upload. Partially implements
33796 - Make the log message for "tls error. breaking." more useful.
33797 - Better log messages about certificate downloads, to attempt to
33798 track down the second incarnation of bug 546.
33800 o Minor features (bridges):
33801 - If bridge users set UpdateBridgesFromAuthority, but the digest
33802 they ask for is a 404 from the bridge authority, they now fall
33803 back to trying the bridge directly.
33804 - Bridges now use begin_dir to publish their server descriptor to
33805 the bridge authority, even when they haven't set TunnelDirConns.
33807 o Minor features (controller):
33808 - When reporting clock skew, and we know that the clock is _at least
33809 as skewed_ as some value, but we don't know the actual value,
33810 report the value as a "minimum skew."
33813 - Update linux-tor-prio.sh script to allow QoS based on the uid of
33814 the Tor process. Patch from Marco Bonetti with tweaks from Mike
33818 - Refuse to start if both ORPort and UseBridges are set. Bugfix
33819 on 0.2.0.x, suggested by Matt Edman.
33820 - Don't stop fetching descriptors when FetchUselessDescriptors is
33821 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
33822 reported by tup and ioerror.
33823 - Better log message on vote from unknown authority.
33824 - Don't log "Launching 0 request for 0 router" message.
33826 o Minor bugfixes (memory leaks):
33827 - Stop leaking memory every time we parse a v3 certificate. Bugfix
33829 - Stop leaking memory every time we load a v3 certificate. Bugfix
33830 on 0.2.0.1-alpha. Fixes bug 536.
33831 - Stop leaking a cached networkstatus on exit. Bugfix on
33833 - Stop leaking voter information every time we free a consensus.
33834 Bugfix on 0.2.0.3-alpha.
33835 - Stop leaking signed data every time we check a voter signature.
33836 Bugfix on 0.2.0.3-alpha.
33837 - Stop leaking a signature every time we fail to parse a consensus or
33838 a vote. Bugfix on 0.2.0.3-alpha.
33839 - Stop leaking v2_download_status_map on shutdown. Bugfix on
33841 - Stop leaking conn->nickname every time we make a connection to a
33842 Tor relay without knowing its expected identity digest (e.g. when
33843 using bridges). Bugfix on 0.2.0.3-alpha.
33845 - Minor bugfixes (portability):
33846 - Run correctly on platforms where rlim_t is larger than unsigned
33847 long, and/or where the real limit for number of open files is
33848 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
33849 particular, these may be needed for OS X 10.5.
33852 Changes in version 0.1.2.18 - 2007-10-28
33853 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
33854 hidden service introduction that were causing huge delays, and a big
33855 bug that was causing some servers to disappear from the network status
33856 lists for a few hours each day.
33858 o Major bugfixes (crashes):
33859 - If a connection is shut down abruptly because of something that
33860 happened inside connection_flushed_some(), do not call
33861 connection_finished_flushing(). Should fix bug 451:
33862 "connection_stop_writing: Assertion conn->write_event failed"
33863 Bugfix on 0.1.2.7-alpha.
33864 - Fix possible segfaults in functions called from
33865 rend_process_relay_cell().
33867 o Major bugfixes (hidden services):
33868 - Hidden services were choosing introduction points uniquely by
33869 hexdigest, but when constructing the hidden service descriptor
33870 they merely wrote the (potentially ambiguous) nickname.
33871 - Clients now use the v2 intro format for hidden service
33872 connections: they specify their chosen rendezvous point by identity
33873 digest rather than by (potentially ambiguous) nickname. These
33874 changes could speed up hidden service connections dramatically.
33876 o Major bugfixes (other):
33877 - Stop publishing a new server descriptor just because we get a
33878 HUP signal. This led (in a roundabout way) to some servers getting
33879 dropped from the networkstatus lists for a few hours each day.
33880 - When looking for a circuit to cannibalize, consider family as well
33881 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33882 circuit cannibalization).
33883 - When a router wasn't listed in a new networkstatus, we were leaving
33884 the flags for that router alone -- meaning it remained Named,
33885 Running, etc -- even though absence from the networkstatus means
33886 that it shouldn't be considered to exist at all anymore. Now we
33887 clear all the flags for routers that fall out of the networkstatus
33888 consensus. Fixes bug 529.
33891 - Don't try to access (or alter) the state file when running
33892 --list-fingerprint or --verify-config or --hash-password. Resolves
33894 - When generating information telling us how to extend to a given
33895 router, do not try to include the nickname if it is
33896 absent. Resolves bug 467.
33897 - Fix a user-triggerable segfault in expand_filename(). (There isn't
33898 a way to trigger this remotely.)
33899 - When sending a status event to the controller telling it that an
33900 OR address is reachable, set the port correctly. (Previously we
33901 were reporting the dir port.)
33902 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33903 command. Bugfix on 0.1.2.17.
33904 - When loading bandwidth history, do not believe any information in
33905 the future. Fixes bug 434.
33906 - When loading entry guard information, do not believe any information
33908 - When we have our clock set far in the future and generate an
33909 onion key, then re-set our clock to be correct, we should not stop
33910 the onion key from getting rotated.
33911 - On some platforms, accept() can return a broken address. Detect
33912 this more quietly, and deal accordingly. Fixes bug 483.
33913 - It's not actually an error to find a non-pending entry in the DNS
33914 cache when canceling a pending resolve. Don't log unless stuff
33915 is fishy. Resolves bug 463.
33916 - Don't reset trusted dir server list when we set a configuration
33917 option. Patch from Robert Hogan.
33918 - Don't try to create the datadir when running --verify-config or
33919 --hash-password. Resolves bug 540.
33922 Changes in version 0.2.0.9-alpha - 2007-10-24
33923 This ninth development snapshot switches clients to the new v3 directory
33924 system; allows servers to be listed in the network status even when they
33925 have the same nickname as a registered server; and fixes many other
33926 bugs including a big one that was causing some servers to disappear
33927 from the network status lists for a few hours each day.
33929 o Major features (directory system):
33930 - Clients now download v3 consensus networkstatus documents instead
33931 of v2 networkstatus documents. Clients and caches now base their
33932 opinions about routers on these consensus documents. Clients only
33933 download router descriptors listed in the consensus.
33934 - Authorities now list servers who have the same nickname as
33935 a different named server, but list them with a new flag,
33936 "Unnamed". Now we can list servers that happen to pick the same
33937 nickname as a server that registered two years ago and then
33938 disappeared. Partially implements proposal 122.
33939 - If the consensus lists a router as "Unnamed", the name is assigned
33940 to a different router: do not identify the router by that name.
33941 Partially implements proposal 122.
33942 - Authorities can now come to a consensus on which method to use to
33943 compute the consensus. This gives us forward compatibility.
33946 - Stop publishing a new server descriptor just because we HUP or
33947 when we find our DirPort to be reachable but won't actually publish
33948 it. New descriptors without any real changes are dropped by the
33949 authorities, and can screw up our "publish every 18 hours" schedule.
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; bugfix on 0.1.2.x.
33957 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
33958 extrainfo documents and then discard them immediately for not
33959 matching the latest router. Bugfix on 0.2.0.1-alpha.
33961 o Minor features (v3 directory protocol):
33962 - Allow tor-gencert to generate a new certificate without replacing
33964 - Allow certificates to include an address.
33965 - When we change our directory-cache settings, reschedule all voting
33966 and download operations.
33967 - Reattempt certificate downloads immediately on failure, as long as
33968 we haven't failed a threshold number of times yet.
33969 - Delay retrying consensus downloads while we're downloading
33970 certificates to verify the one we just got. Also, count getting a
33971 consensus that we already have (or one that isn't valid) as a failure,
33972 and count failing to get the certificates after 20 minutes as a
33974 - Build circuits and download descriptors even if our consensus is a
33975 little expired. (This feature will go away once authorities are
33978 o Minor features (router descriptor cache):
33979 - If we find a cached-routers file that's been sitting around for more
33980 than 28 days unmodified, then most likely it's a leftover from
33981 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
33983 - When we (as a cache) download a descriptor because it was listed
33984 in a consensus, remember when the consensus was supposed to expire,
33985 and don't expire the descriptor until then.
33987 o Minor features (performance):
33988 - Call routerlist_remove_old_routers() much less often. This should
33989 speed startup, especially on directory caches.
33990 - Don't try to launch new descriptor downloads quite so often when we
33991 already have enough directory information to build circuits.
33992 - Base64 decoding was actually showing up on our profile when parsing
33993 the initial descriptor file; switch to an in-process all-at-once
33994 implementation that's about 3.5x times faster than calling out to
33997 o Minor features (compilation):
33998 - Detect non-ASCII platforms (if any still exist) and refuse to
33999 build there: some of our code assumes that 'A' is 65 and so on.
34001 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
34002 - Make the "next period" votes into "current period" votes immediately
34003 after publishing the consensus; avoid a heisenbug that made them
34004 stick around indefinitely.
34005 - When we discard a vote as a duplicate, do not report this as
34007 - Treat missing v3 keys or certificates as an error when running as a
34008 v3 directory authority.
34009 - When we're configured to be a v3 authority, but we're only listed
34010 as a non-v3 authority in our DirServer line for ourself, correct
34012 - If an authority doesn't have a qualified hostname, just put
34013 its address in the vote. This fixes the problem where we referred to
34014 "moria on moria:9031."
34015 - Distinguish between detached signatures for the wrong period, and
34016 detached signatures for a divergent vote.
34017 - Fix a small memory leak when computing a consensus.
34018 - When there's no consensus, we were forming a vote every 30
34019 minutes, but writing the "valid-after" line in our vote based
34020 on our configured V3AuthVotingInterval: so unless the intervals
34021 matched up, we immediately rejected our own vote because it didn't
34022 start at the voting interval that caused us to construct a vote.
34024 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
34025 - Delete unverified-consensus when the real consensus is set.
34026 - Consider retrying a consensus networkstatus fetch immediately
34027 after one fails: don't wait 60 seconds to notice.
34028 - When fetching a consensus as a cache, wait until a newer consensus
34029 should exist before trying to replace the current one.
34030 - Use a more forgiving schedule for retrying failed consensus
34031 downloads than for other types.
34033 o Minor bugfixes (other directory issues):
34034 - Correct the implementation of "download votes by digest." Bugfix on
34036 - Authorities no longer send back "400 you're unreachable please fix
34037 it" errors to Tor servers that aren't online all the time. We're
34038 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
34040 o Minor bugfixes (controller):
34041 - Don't reset trusted dir server list when we set a configuration
34042 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
34043 - Respond to INT and TERM SIGNAL commands before we execute the
34044 signal, in case the signal shuts us down. We had a patch in
34045 0.1.2.1-alpha that tried to do this by queueing the response on
34046 the connection's buffer before shutting down, but that really
34047 isn't the same thing at all. Bug located by Matt Edman.
34049 o Minor bugfixes (misc):
34050 - Correctly check for bad options to the "PublishServerDescriptor"
34051 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
34052 - Stop leaking memory on failing case of base32_decode, and make
34053 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
34054 - Don't try to download extrainfo documents when we're trying to
34055 fetch enough directory info to build a circuit: having enough
34056 info should get priority. Bugfix on 0.2.0.x.
34057 - Don't complain that "your server has not managed to confirm that its
34058 ports are reachable" if we haven't been able to build any circuits
34059 yet. Bug found by spending four hours without a v3 consensus. Bugfix
34061 - Detect the reason for failing to mmap a descriptor file we just
34062 wrote, and give a more useful log message. Fixes bug 533. Bugfix
34065 o Code simplifications and refactoring:
34066 - Remove support for the old bw_accounting file: we've been storing
34067 bandwidth accounting information in the state file since
34068 0.1.2.5-alpha. This may result in bandwidth accounting errors
34069 if you try to upgrade from 0.1.1.x or earlier, or if you try to
34070 downgrade to 0.1.1.x or earlier.
34071 - New convenience code to locate a file within the DataDirectory.
34072 - Move non-authority functionality out of dirvote.c.
34073 - Refactor the arguments for router_pick_{directory_|trusteddir}server
34074 so that they all take the same named flags.
34077 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
34078 Unix users an easy way to script their Tor process (e.g. by
34079 adjusting bandwidth based on the time of the day).
34082 Changes in version 0.2.0.8-alpha - 2007-10-12
34083 This eighth development snapshot fixes a crash bug that's been bothering
34084 us since February 2007, lets bridge authorities store a list of bridge
34085 descriptors they've seen, gets v3 directory voting closer to working,
34086 starts caching v3 directory consensus documents on directory mirrors,
34087 and fixes a variety of smaller issues including some minor memory leaks.
34089 o Major features (router descriptor cache):
34090 - Store routers in a file called cached-descriptors instead of in
34091 cached-routers. Initialize cached-descriptors from cached-routers
34092 if the old format is around. The new format allows us to store
34093 annotations along with descriptors.
34094 - Use annotations to record the time we received each descriptor, its
34095 source, and its purpose.
34096 - Disable the SETROUTERPURPOSE controller command: it is now
34098 - Controllers should now specify cache=no or cache=yes when using
34099 the +POSTDESCRIPTOR command.
34100 - Bridge authorities now write bridge descriptors to disk, meaning
34101 we can export them to other programs and begin distributing them
34104 o Major features (directory authorities):
34105 - When a v3 authority is missing votes or signatures, it now tries
34107 - Directory authorities track weighted fractional uptime as well as
34108 weighted mean-time-between failures. WFU is suitable for deciding
34109 whether a node is "usually up", while MTBF is suitable for deciding
34110 whether a node is "likely to stay up." We need both, because
34111 "usually up" is a good requirement for guards, while "likely to
34112 stay up" is a good requirement for long-lived connections.
34114 o Major features (v3 directory system):
34115 - Caches now download v3 network status documents as needed,
34116 and download the descriptors listed in them.
34117 - All hosts now attempt to download and keep fresh v3 authority
34118 certificates, and re-attempt after failures.
34119 - More internal-consistency checks for vote parsing.
34121 o Major bugfixes (crashes):
34122 - If a connection is shut down abruptly because of something that
34123 happened inside connection_flushed_some(), do not call
34124 connection_finished_flushing(). Should fix bug 451. Bugfix on
34127 o Major bugfixes (performance):
34128 - Fix really bad O(n^2) performance when parsing a long list of
34129 routers: Instead of searching the entire list for an "extra-info "
34130 string which usually wasn't there, once for every routerinfo
34131 we read, just scan lines forward until we find one we like.
34133 - When we add data to a write buffer in response to the data on that
34134 write buffer getting low because of a flush, do not consider the
34135 newly added data as a candidate for immediate flushing, but rather
34136 make it wait until the next round of writing. Otherwise, we flush
34137 and refill recursively, and a single greedy TLS connection can
34138 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
34140 o Minor features (v3 authority system):
34141 - Add more ways for tools to download the votes that lead to the
34143 - Send a 503 when low on bandwidth and a vote, consensus, or
34144 certificate is requested.
34145 - If-modified-since is now implemented properly for all kinds of
34146 certificate requests.
34148 o Minor bugfixes (network statuses):
34149 - Tweak the implementation of proposal 109 slightly: allow at most
34150 two Tor servers on the same IP address, except if it's the location
34151 of a directory authority, in which case allow five. Bugfix on
34154 o Minor bugfixes (controller):
34155 - When sending a status event to the controller telling it that an
34156 OR address is reachable, set the port correctly. (Previously we
34157 were reporting the dir port.) Bugfix on 0.1.2.x.
34159 o Minor bugfixes (v3 directory system):
34160 - Fix logic to look up a cert by its signing key digest. Bugfix on
34162 - Only change the reply to a vote to "OK" if it's not already
34163 set. This gets rid of annoying "400 OK" log messages, which may
34164 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
34165 - When we get a valid consensus, recompute the voting schedule.
34166 - Base the valid-after time of a vote on the consensus voting
34167 schedule, not on our preferred schedule.
34168 - Make the return values and messages from signature uploads and
34169 downloads more sensible.
34170 - Fix a memory leak when serving votes and consensus documents, and
34171 another when serving certificates.
34173 o Minor bugfixes (performance):
34174 - Use a slightly simpler string hashing algorithm (copying Python's
34175 instead of Java's) and optimize our digest hashing algorithm to take
34176 advantage of 64-bit platforms and to remove some possibly-costly
34178 - Fix a minor memory leak whenever we parse guards from our state
34179 file. Bugfix on 0.2.0.7-alpha.
34180 - Fix a minor memory leak whenever we write out a file. Bugfix on
34182 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
34183 command. Bugfix on 0.2.0.5-alpha.
34185 o Minor bugfixes (portability):
34186 - On some platforms, accept() can return a broken address. Detect
34187 this more quietly, and deal accordingly. Fixes bug 483.
34188 - Stop calling tor_strlower() on uninitialized memory in some cases.
34189 Bugfix in 0.2.0.7-alpha.
34191 o Minor bugfixes (usability):
34192 - Treat some 403 responses from directory servers as INFO rather than
34193 WARN-severity events.
34194 - It's not actually an error to find a non-pending entry in the DNS
34195 cache when canceling a pending resolve. Don't log unless stuff is
34196 fishy. Resolves bug 463.
34198 o Minor bugfixes (anonymity):
34199 - Never report that we've used more bandwidth than we're willing to
34200 relay: it leaks how much non-relay traffic we're using. Resolves
34202 - When looking for a circuit to cannibalize, consider family as well
34203 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
34204 circuit cannibalization).
34206 o Code simplifications and refactoring:
34207 - Make a bunch of functions static. Remove some dead code.
34208 - Pull out about a third of the really big routerlist.c; put it in a
34209 new module, networkstatus.c.
34210 - Merge the extra fields in local_routerstatus_t back into
34211 routerstatus_t: we used to need one routerstatus_t for each
34212 authority's opinion, plus a local_routerstatus_t for the locally
34213 computed consensus opinion. To save space, we put the locally
34214 modified fields into local_routerstatus_t, and only the common
34215 stuff into routerstatus_t. But once v3 directories are in use,
34216 clients and caches will no longer need to hold authority opinions;
34217 thus, the rationale for keeping the types separate is now gone.
34218 - Make the code used to reschedule and reattempt downloads more
34220 - Turn all 'Are we a directory server/mirror?' logic into a call to
34222 - Remove the code to generate the oldest (v1) directory format.
34223 The code has been disabled since 0.2.0.5-alpha.
34226 Changes in version 0.2.0.7-alpha - 2007-09-21
34227 This seventh development snapshot makes bridges work again, makes bridge
34228 authorities work for the first time, fixes two huge performance flaws
34229 in hidden services, and fixes a variety of minor issues.
34231 o New directory authorities:
34232 - Set up moria1 and tor26 as the first v3 directory authorities. See
34233 doc/spec/dir-spec.txt for details on the new directory design.
34235 o Major bugfixes (crashes):
34236 - Fix possible segfaults in functions called from
34237 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34239 o Major bugfixes (bridges):
34240 - Fix a bug that made servers send a "404 Not found" in response to
34241 attempts to fetch their server descriptor. This caused Tor servers
34242 to take many minutes to establish reachability for their DirPort,
34243 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34244 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34245 users configure that and specify a bridge with an identity
34246 fingerprint, now they will lookup the bridge descriptor at the
34247 default bridge authority via a one-hop tunnel, but once circuits
34248 are established they will switch to a three-hop tunnel for later
34249 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34251 o Major bugfixes (hidden services):
34252 - Hidden services were choosing introduction points uniquely by
34253 hexdigest, but when constructing the hidden service descriptor
34254 they merely wrote the (potentially ambiguous) nickname.
34255 - Clients now use the v2 intro format for hidden service
34256 connections: they specify their chosen rendezvous point by identity
34257 digest rather than by (potentially ambiguous) nickname. Both
34258 are bugfixes on 0.1.2.x, and they could speed up hidden service
34259 connections dramatically. Thanks to Karsten Loesing.
34261 o Minor features (security):
34262 - As a client, do not believe any server that tells us that an
34263 address maps to an internal address space.
34264 - Make it possible to enable HashedControlPassword and
34265 CookieAuthentication at the same time.
34267 o Minor features (guard nodes):
34268 - Tag every guard node in our state file with the version that
34269 we believe added it, or with our own version if we add it. This way,
34270 if a user temporarily runs an old version of Tor and then switches
34271 back to a new one, she doesn't automatically lose her guards.
34273 o Minor features (speed):
34274 - When implementing AES counter mode, update only the portions of the
34275 counter buffer that need to change, and don't keep separate
34276 network-order and host-order counters when they are the same (i.e.,
34277 on big-endian hosts.)
34279 o Minor features (controller):
34280 - Accept LF instead of CRLF on controller, since some software has a
34281 hard time generating real Internet newlines.
34282 - Add GETINFO values for the server status events
34283 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34286 o Removed features:
34287 - Routers no longer include bandwidth-history lines in their
34288 descriptors; this information is already available in extra-info
34289 documents, and including it in router descriptors took up 60%
34290 (!) of compressed router descriptor downloads. Completes
34291 implementation of proposal 104.
34292 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34293 and TorControl.py, as they use the old v0 controller protocol,
34294 and are obsoleted by TorFlow anyway.
34295 - Drop support for v1 rendezvous descriptors, since we never used
34296 them anyway, and the code has probably rotted by now. Based on
34297 patch from Karsten Loesing.
34298 - On OSX, stop warning the user that kqueue support in libevent is
34299 "experimental", since it seems to have worked fine for ages.
34302 - When generating information telling us how to extend to a given
34303 router, do not try to include the nickname if it is absent. Fixes
34304 bug 467. Bugfix on 0.2.0.3-alpha.
34305 - Fix a user-triggerable (but not remotely-triggerable) segfault
34306 in expand_filename(). Bugfix on 0.1.2.x.
34307 - Fix a memory leak when freeing incomplete requests from DNSPort.
34308 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34309 - Don't try to access (or alter) the state file when running
34310 --list-fingerprint or --verify-config or --hash-password. (Resolves
34311 bug 499.) Bugfix on 0.1.2.x.
34312 - Servers used to decline to publish their DirPort if their
34313 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34314 were below a threshold. Now they only look at BandwidthRate and
34315 RelayBandwidthRate. Bugfix on 0.1.2.x.
34316 - Remove an optimization in the AES counter-mode code that assumed
34317 that the counter never exceeded 2^68. When the counter can be set
34318 arbitrarily as an IV (as it is by Karsten's new hidden services
34319 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34320 - Resume listing "AUTHORITY" flag for authorities in network status.
34321 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34323 o Code simplifications and refactoring:
34324 - Revamp file-writing logic so we don't need to have the entire
34325 contents of a file in memory at once before we write to disk. Tor,
34327 - Turn "descriptor store" into a full-fledged type.
34328 - Move all NT services code into a separate source file.
34329 - Unify all code that computes medians, percentile elements, etc.
34330 - Get rid of a needless malloc when parsing address policies.
34333 Changes in version 0.1.2.17 - 2007-08-30
34334 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34335 X bundles. Vidalia 0.0.14 makes authentication required for the
34336 ControlPort in the default configuration, which addresses important
34337 security risks. Everybody who uses Vidalia (or another controller)
34340 In addition, this Tor update fixes major load balancing problems with
34341 path selection, which should speed things up a lot once many people
34344 o Major bugfixes (security):
34345 - We removed support for the old (v0) control protocol. It has been
34346 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34347 become more of a headache than it's worth.
34349 o Major bugfixes (load balancing):
34350 - When choosing nodes for non-guard positions, weight guards
34351 proportionally less, since they already have enough load. Patch
34353 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34354 will allow fast Tor servers to get more attention.
34355 - When we're upgrading from an old Tor version, forget our current
34356 guards and pick new ones according to the new weightings. These
34357 three load balancing patches could raise effective network capacity
34358 by a factor of four. Thanks to Mike Perry for measurements.
34360 o Major bugfixes (stream expiration):
34361 - Expire not-yet-successful application streams in all cases if
34362 they've been around longer than SocksTimeout. Right now there are
34363 some cases where the stream will live forever, demanding a new
34364 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34366 o Minor features (controller):
34367 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34368 is valid before any authentication has been received. It tells
34369 a controller what kind of authentication is expected, and what
34370 protocol is spoken. Implements proposal 119.
34372 o Minor bugfixes (performance):
34373 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34374 greatly speeding up loading cached-routers from disk on startup.
34375 - Disable sentinel-based debugging for buffer code: we squashed all
34376 the bugs that this was supposed to detect a long time ago, and now
34377 its only effect is to change our buffer sizes from nice powers of
34378 two (which platform mallocs tend to like) to values slightly over
34379 powers of two (which make some platform mallocs sad).
34381 o Minor bugfixes (misc):
34382 - If exit bandwidth ever exceeds one third of total bandwidth, then
34383 use the correct formula to weight exit nodes when choosing paths.
34384 Based on patch from Mike Perry.
34385 - Choose perfectly fairly among routers when choosing by bandwidth and
34386 weighting by fraction of bandwidth provided by exits. Previously, we
34387 would choose with only approximate fairness, and correct ourselves
34388 if we ran off the end of the list.
34389 - If we require CookieAuthentication but we fail to write the
34390 cookie file, we would warn but not exit, and end up in a state
34391 where no controller could authenticate. Now we exit.
34392 - If we require CookieAuthentication, stop generating a new cookie
34393 every time we change any piece of our config.
34394 - Refuse to start with certain directory authority keys, and
34395 encourage people using them to stop.
34396 - Terminate multi-line control events properly. Original patch
34398 - Fix a minor memory leak when we fail to find enough suitable
34399 servers to choose a circuit.
34400 - Stop leaking part of the descriptor when we run into a particularly
34401 unparseable piece of it.
34404 Changes in version 0.2.0.6-alpha - 2007-08-26
34405 This sixth development snapshot features a new Vidalia version in the
34406 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34407 the ControlPort in the default configuration, which addresses important
34410 In addition, this snapshot fixes major load balancing problems
34411 with path selection, which should speed things up a lot once many
34412 people have upgraded. The directory authorities also use a new
34413 mean-time-between-failure approach to tracking which servers are stable,
34414 rather than just looking at the most recent uptime.
34416 o New directory authorities:
34417 - Set up Tonga as the default bridge directory authority.
34420 - Directory authorities now track servers by weighted
34421 mean-times-between-failures. When we have 4 or more days of data,
34422 use measured MTBF rather than declared uptime to decide whether
34423 to call a router Stable. Implements proposal 108.
34425 o Major bugfixes (load balancing):
34426 - When choosing nodes for non-guard positions, weight guards
34427 proportionally less, since they already have enough load. Patch
34429 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34430 will allow fast Tor servers to get more attention.
34431 - When we're upgrading from an old Tor version, forget our current
34432 guards and pick new ones according to the new weightings. These
34433 three load balancing patches could raise effective network capacity
34434 by a factor of four. Thanks to Mike Perry for measurements.
34436 o Major bugfixes (descriptor parsing):
34437 - Handle unexpected whitespace better in malformed descriptors. Bug
34438 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34441 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
34442 GETINFO for Torstat to use until it can switch to using extrainfos.
34443 - Optionally (if built with -DEXPORTMALLINFO) export the output
34444 of mallinfo via http, as tor/mallinfo.txt. Only accessible
34448 - Do not intermix bridge routers with controller-added
34449 routers. (Bugfix on 0.2.0.x)
34450 - Do not fail with an assert when accept() returns an unexpected
34451 address family. Addresses but does not wholly fix bug 483. (Bugfix
34453 - Let directory authorities startup even when they can't generate
34454 a descriptor immediately, e.g. because they don't know their
34456 - Stop putting the authentication cookie in a file called "0"
34457 in your working directory if you don't specify anything for the
34458 new CookieAuthFile option. Reported by Matt Edman.
34459 - Make it possible to read the PROTOCOLINFO response in a way that
34460 conforms to our control-spec. Reported by Matt Edman.
34461 - Fix a minor memory leak when we fail to find enough suitable
34462 servers to choose a circuit. Bugfix on 0.1.2.x.
34463 - Stop leaking part of the descriptor when we run into a particularly
34464 unparseable piece of it. Bugfix on 0.1.2.x.
34465 - Unmap the extrainfo cache file on exit.
34468 Changes in version 0.2.0.5-alpha - 2007-08-19
34469 This fifth development snapshot fixes compilation on Windows again;
34470 fixes an obnoxious client-side bug that slowed things down and put
34471 extra load on the network; gets us closer to using the v3 directory
34472 voting scheme; makes it easier for Tor controllers to use cookie-based
34473 authentication; and fixes a variety of other bugs.
34475 o Removed features:
34476 - Version 1 directories are no longer generated in full. Instead,
34477 authorities generate and serve "stub" v1 directories that list
34478 no servers. This will stop Tor versions 0.1.0.x and earlier from
34479 working, but (for security reasons) nobody should be running those
34482 o Major bugfixes (compilation, 0.2.0.x):
34483 - Try to fix Win32 compilation again: improve checking for IPv6 types.
34484 - Try to fix MSVC compilation: build correctly on platforms that do
34485 not define s6_addr16 or s6_addr32.
34486 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
34489 o Major bugfixes (stream expiration):
34490 - Expire not-yet-successful application streams in all cases if
34491 they've been around longer than SocksTimeout. Right now there are
34492 some cases where the stream will live forever, demanding a new
34493 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
34494 reported by lodger.
34496 o Minor features (directory servers):
34497 - When somebody requests a list of statuses or servers, and we have
34498 none of those, return a 404 rather than an empty 200.
34500 o Minor features (directory voting):
34501 - Store v3 consensus status consensuses on disk, and reload them
34504 o Minor features (security):
34505 - Warn about unsafe ControlPort configurations.
34506 - Refuse to start with certain directory authority keys, and
34507 encourage people using them to stop.
34509 o Minor features (controller):
34510 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34511 is valid before any authentication has been received. It tells
34512 a controller what kind of authentication is expected, and what
34513 protocol is spoken. Implements proposal 119.
34514 - New config option CookieAuthFile to choose a new location for the
34515 cookie authentication file, and config option
34516 CookieAuthFileGroupReadable to make it group-readable.
34518 o Minor features (unit testing):
34519 - Add command-line arguments to unit-test executable so that we can
34520 invoke any chosen test from the command line rather than having
34521 to run the whole test suite at once; and so that we can turn on
34522 logging for the unit tests.
34524 o Minor bugfixes (on 0.1.2.x):
34525 - If we require CookieAuthentication but we fail to write the
34526 cookie file, we would warn but not exit, and end up in a state
34527 where no controller could authenticate. Now we exit.
34528 - If we require CookieAuthentication, stop generating a new cookie
34529 every time we change any piece of our config.
34530 - When loading bandwidth history, do not believe any information in
34531 the future. Fixes bug 434.
34532 - When loading entry guard information, do not believe any information
34534 - When we have our clock set far in the future and generate an
34535 onion key, then re-set our clock to be correct, we should not stop
34536 the onion key from getting rotated.
34537 - Clean up torrc sample config file.
34538 - Do not automatically run configure from autogen.sh. This
34539 non-standard behavior tended to annoy people who have built other
34542 o Minor bugfixes (on 0.2.0.x):
34543 - Fix a bug with AutomapHostsOnResolve that would always cause
34544 the second request to fail. Bug reported by Kate. Bugfix on
34546 - Fix a bug in ADDRMAP controller replies that would sometimes
34547 try to print a NULL. Patch from tup.
34548 - Read v3 directory authority keys from the right location.
34549 - Numerous bugfixes to directory voting code.
34552 Changes in version 0.1.2.16 - 2007-08-01
34553 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
34554 remote attacker in certain situations to rewrite the user's torrc
34555 configuration file. This can completely compromise anonymity of users
34556 in most configurations, including those running the Vidalia bundles,
34557 TorK, etc. Or worse.
34559 o Major security fixes:
34560 - Close immediately after missing authentication on control port;
34561 do not allow multiple authentication attempts.
34564 Changes in version 0.2.0.4-alpha - 2007-08-01
34565 This fourth development snapshot fixes a critical security vulnerability
34566 for most users, specifically those running Vidalia, TorK, etc. Everybody
34567 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34569 o Major security fixes:
34570 - Close immediately after missing authentication on control port;
34571 do not allow multiple authentication attempts.
34573 o Major bugfixes (compilation):
34574 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34577 o Minor features (performance):
34578 - Be even more aggressive about releasing RAM from small
34579 empty buffers. Thanks to our free-list code, this shouldn't be too
34580 performance-intensive.
34581 - Disable sentinel-based debugging for buffer code: we squashed all
34582 the bugs that this was supposed to detect a long time ago, and
34583 now its only effect is to change our buffer sizes from nice
34584 powers of two (which platform mallocs tend to like) to values
34585 slightly over powers of two (which make some platform mallocs sad).
34586 - Log malloc statistics from mallinfo() on platforms where it
34590 Changes in version 0.2.0.3-alpha - 2007-07-29
34591 This third development snapshot introduces new experimental
34592 blocking-resistance features and a preliminary version of the v3
34593 directory voting design, and includes many other smaller features
34597 - The first pieces of our "bridge" design for blocking-resistance
34598 are implemented. People can run bridge directory authorities;
34599 people can run bridges; and people can configure their Tor clients
34600 with a set of bridges to use as the first hop into the Tor network.
34601 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
34603 - Create listener connections before we setuid to the configured
34604 User and Group. Now non-Windows users can choose port values
34605 under 1024, start Tor as root, and have Tor bind those ports
34606 before it changes to another UID. (Windows users could already
34608 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
34609 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
34610 on "vserver" accounts. (Patch from coderman.)
34611 - Be even more aggressive about separating local traffic from relayed
34612 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
34614 o Major features (experimental):
34615 - First cut of code for "v3 dir voting": directory authorities will
34616 vote on a common network status document rather than each publishing
34617 their own opinion. This code needs more testing and more corner-case
34618 handling before it's ready for use.
34621 - Directory authorities now call routers Fast if their bandwidth is
34622 at least 100KB/s, and consider their bandwidth adequate to be a
34623 Guard if it is at least 250KB/s, no matter the medians. This fix
34624 complements proposal 107. [Bugfix on 0.1.2.x]
34625 - Directory authorities now never mark more than 3 servers per IP as
34626 Valid and Running. (Implements proposal 109, by Kevin Bauer and
34628 - Minor change to organizationName and commonName generation
34629 procedures in TLS certificates during Tor handshakes, to invalidate
34630 some earlier censorware approaches. This is not a long-term
34631 solution, but applying it will give us a bit of time to look into
34632 the epidemiology of countermeasures as they spread.
34634 o Major bugfixes (directory):
34635 - Rewrite directory tokenization code to never run off the end of
34636 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
34638 o Minor features (controller):
34639 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
34640 match requests to applications. (Patch from Robert Hogan.)
34641 - Report address and port correctly on connections to DNSPort. (Patch
34642 from Robert Hogan.)
34643 - Add a RESOLVE command to launch hostname lookups. (Original patch
34644 from Robert Hogan.)
34645 - Add GETINFO status/enough-dir-info to let controllers tell whether
34646 Tor has downloaded sufficient directory information. (Patch
34648 - You can now use the ControlSocket option to tell Tor to listen for
34649 controller connections on Unix domain sockets on systems that
34650 support them. (Patch from Peter Palfrader.)
34651 - STREAM NEW events are generated for DNSPort requests and for
34652 tunneled directory connections. (Patch from Robert Hogan.)
34653 - New "GETINFO address-mappings/*" command to get address mappings
34654 with expiry information. "addr-mappings/*" is now deprecated.
34657 o Minor features (misc):
34658 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
34660 - The tor-gencert tool for v3 directory authorities now creates all
34661 files as readable to the file creator only, and write-protects
34662 the authority identity key.
34663 - When dumping memory usage, list bytes used in buffer memory
34665 - When running with dmalloc, dump more stats on hup and on exit.
34666 - Directory authorities now fail quickly and (relatively) harmlessly
34667 if they generate a network status document that is somehow
34670 o Traffic load balancing improvements:
34671 - If exit bandwidth ever exceeds one third of total bandwidth, then
34672 use the correct formula to weight exit nodes when choosing paths.
34673 (Based on patch from Mike Perry.)
34674 - Choose perfectly fairly among routers when choosing by bandwidth and
34675 weighting by fraction of bandwidth provided by exits. Previously, we
34676 would choose with only approximate fairness, and correct ourselves
34677 if we ran off the end of the list. [Bugfix on 0.1.2.x]
34679 o Performance improvements:
34680 - Be more aggressive with freeing buffer RAM or putting it on the
34682 - Use Critical Sections rather than Mutexes for synchronizing threads
34683 on win32; Mutexes are heavier-weight, and designed for synchronizing
34686 o Deprecated and removed features:
34687 - RedirectExits is now deprecated.
34688 - Stop allowing address masks that do not correspond to bit prefixes.
34689 We have warned about these for a really long time; now it's time
34690 to reject them. (Patch from croup.)
34692 o Minor bugfixes (directory):
34693 - Fix another crash bug related to extra-info caching. (Bug found by
34694 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
34695 - Directories no longer return a "304 not modified" when they don't
34696 have the networkstatus the client asked for. Also fix a memory
34697 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
34698 - We had accidentally labelled 0.1.2.x directory servers as not
34699 suitable for begin_dir requests, and had labelled no directory
34700 servers as suitable for uploading extra-info documents. [Bugfix
34703 o Minor bugfixes (dns):
34704 - Fix a crash when DNSPort is set more than once. (Patch from Robert
34705 Hogan.) [Bugfix on 0.2.0.2-alpha]
34706 - Add DNSPort connections to the global connection list, so that we
34707 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
34709 - Fix a dangling reference that could lead to a crash when DNSPort is
34710 changed or closed (Patch from Robert Hogan.) [Bugfix on
34713 o Minor bugfixes (controller):
34714 - Provide DNS expiry times in GMT, not in local time. For backward
34715 compatibility, ADDRMAP events only provide GMT expiry in an extended
34716 field. "GETINFO address-mappings" always does the right thing.
34717 - Use CRLF line endings properly in NS events.
34718 - Terminate multi-line control events properly. (Original patch
34719 from tup.) [Bugfix on 0.1.2.x-alpha]
34720 - Do not include spaces in SOURCE_ADDR fields in STREAM
34721 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
34724 Changes in version 0.1.2.15 - 2007-07-17
34725 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
34726 problems, fixes compilation on BSD, and fixes a variety of other
34727 bugs. Everybody should upgrade.
34729 o Major bugfixes (compilation):
34730 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
34732 o Major bugfixes (crashes):
34733 - Try even harder not to dereference the first character after
34734 an mmap(). Reported by lodger.
34735 - Fix a crash bug in directory authorities when we re-number the
34736 routerlist while inserting a new router.
34737 - When the cached-routers file is an even multiple of the page size,
34738 don't run off the end and crash. (Fixes bug 455; based on idea
34740 - Fix eventdns.c behavior on Solaris: It is critical to include
34741 orconfig.h _before_ sys/types.h, so that we can get the expected
34742 definition of _FILE_OFFSET_BITS.
34744 o Major bugfixes (security):
34745 - Fix a possible buffer overrun when using BSD natd support. Bug
34747 - When sending destroy cells from a circuit's origin, don't include
34748 the reason for tearing down the circuit. The spec says we didn't,
34749 and now we actually don't. Reported by lodger.
34750 - Keep streamids from different exits on a circuit separate. This
34751 bug may have allowed other routers on a given circuit to inject
34752 cells into streams. Reported by lodger; fixes bug 446.
34753 - If there's a never-before-connected-to guard node in our list,
34754 never choose any guards past it. This way we don't expand our
34755 guard list unless we need to.
34757 o Minor bugfixes (guard nodes):
34758 - Weight guard selection by bandwidth, so that low-bandwidth nodes
34759 don't get overused as guards.
34761 o Minor bugfixes (directory):
34762 - Correctly count the number of authorities that recommend each
34763 version. Previously, we were under-counting by 1.
34764 - Fix a potential crash bug when we load many server descriptors at
34765 once and some of them make others of them obsolete. Fixes bug 458.
34767 o Minor bugfixes (hidden services):
34768 - Stop tearing down the whole circuit when the user asks for a
34769 connection to a port that the hidden service didn't configure.
34772 o Minor bugfixes (misc):
34773 - On Windows, we were preventing other processes from reading
34774 cached-routers while Tor was running. Reported by janbar.
34775 - Fix a possible (but very unlikely) bug in picking routers by
34776 bandwidth. Add a log message to confirm that it is in fact
34777 unlikely. Patch from lodger.
34778 - Backport a couple of memory leak fixes.
34779 - Backport miscellaneous cosmetic bugfixes.
34782 Changes in version 0.2.0.2-alpha - 2007-06-02
34783 o Major bugfixes on 0.2.0.1-alpha:
34784 - Fix an assertion failure related to servers without extra-info digests.
34785 Resolves bugs 441 and 442.
34787 o Minor features (directory):
34788 - Support "If-Modified-Since" when answering HTTP requests for
34789 directories, running-routers documents, and network-status documents.
34790 (There's no need to support it for router descriptors, since those
34791 are downloaded by descriptor digest.)
34793 o Minor build issues:
34794 - Clear up some MIPSPro compiler warnings.
34795 - When building from a tarball on a machine that happens to have SVK
34796 installed, report the micro-revision as whatever version existed
34797 in the tarball, not as "x".
34800 Changes in version 0.2.0.1-alpha - 2007-06-01
34801 This early development snapshot provides new features for people running
34802 Tor as both a client and a server (check out the new RelayBandwidth
34803 config options); lets Tor run as a DNS proxy; and generally moves us
34804 forward on a lot of fronts.
34806 o Major features, server usability:
34807 - New config options RelayBandwidthRate and RelayBandwidthBurst:
34808 a separate set of token buckets for relayed traffic. Right now
34809 relayed traffic is defined as answers to directory requests, and
34810 OR connections that don't have any local circuits on them.
34812 o Major features, client usability:
34813 - A client-side DNS proxy feature to replace the need for
34814 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
34815 for DNS requests on port 9999, use the Tor network to resolve them
34816 anonymously, and send the reply back like a regular DNS server.
34817 The code still only implements a subset of DNS.
34818 - Make PreferTunneledDirConns and TunnelDirConns work even when
34819 we have no cached directory info. This means Tor clients can now
34820 do all of their connections protected by TLS.
34822 o Major features, performance and efficiency:
34823 - Directory authorities accept and serve "extra info" documents for
34824 routers. These documents contain fields from router descriptors
34825 that aren't usually needed, and that use a lot of excess
34826 bandwidth. Once these fields are removed from router descriptors,
34827 the bandwidth savings should be about 60%. [Partially implements
34829 - Servers upload extra-info documents to any authority that accepts
34830 them. Authorities (and caches that have been configured to download
34831 extra-info documents) download them as needed. [Partially implements
34833 - Change the way that Tor buffers data that it is waiting to write.
34834 Instead of queueing data cells in an enormous ring buffer for each
34835 client->OR or OR->OR connection, we now queue cells on a separate
34836 queue for each circuit. This lets us use less slack memory, and
34837 will eventually let us be smarter about prioritizing different kinds
34839 - Use memory pools to allocate cells with better speed and memory
34840 efficiency, especially on platforms where malloc() is inefficient.
34841 - Stop reading on edge connections when their corresponding circuit
34842 buffers are full; start again as the circuits empty out.
34844 o Major features, other:
34845 - Add an HSAuthorityRecordStats option that hidden service authorities
34846 can use to track statistics of overall hidden service usage without
34847 logging information that would be very useful to an attacker.
34848 - Start work implementing multi-level keys for directory authorities:
34849 Add a standalone tool to generate key certificates. (Proposal 103.)
34852 - Directory authorities now call routers Stable if they have an
34853 uptime of at least 30 days, even if that's not the median uptime
34854 in the network. Implements proposal 107, suggested by Kevin Bauer
34857 o Minor fixes (resource management):
34858 - Count the number of open sockets separately from the number
34859 of active connection_t objects. This will let us avoid underusing
34860 our allocated connection limit.
34861 - We no longer use socket pairs to link an edge connection to an
34862 anonymous directory connection or a DirPort test connection.
34863 Instead, we track the link internally and transfer the data
34864 in-process. This saves two sockets per "linked" connection (at the
34865 client and at the server), and avoids the nasty Windows socketpair()
34867 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
34868 for every single inactive connection_t. Free items from the
34869 4k/16k-buffer free lists when they haven't been used for a while.
34871 o Minor features (build):
34872 - Make autoconf search for libevent, openssl, and zlib consistently.
34873 - Update deprecated macros in configure.in.
34874 - When warning about missing headers, tell the user to let us
34875 know if the compile succeeds anyway, so we can downgrade the
34877 - Include the current subversion revision as part of the version
34878 string: either fetch it directly if we're in an SVN checkout, do
34879 some magic to guess it if we're in an SVK checkout, or use
34880 the last-detected version if we're building from a .tar.gz.
34881 Use this version consistently in log messages.
34883 o Minor features (logging):
34884 - Always prepend "Bug: " to any log message about a bug.
34885 - Put a platform string (e.g. "Linux i686") in the startup log
34886 message, so when people paste just their logs, we know if it's
34887 OpenBSD or Windows or what.
34888 - When logging memory usage, break down memory used in buffers by
34891 o Minor features (directory system):
34892 - New config option V2AuthoritativeDirectory that all directory
34893 authorities should set. This will let future authorities choose
34894 not to serve V2 directory information.
34895 - Directory authorities allow multiple router descriptors and/or extra
34896 info documents to be uploaded in a single go. This will make
34897 implementing proposal 104 simpler.
34899 o Minor features (controller):
34900 - Add a new config option __DisablePredictedCircuits designed for
34901 use by the controller, when we don't want Tor to build any circuits
34903 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
34904 so we can exit from the middle of the circuit.
34905 - Implement "getinfo status/circuit-established".
34906 - Implement "getinfo status/version/..." so a controller can tell
34907 whether the current version is recommended, and whether any versions
34908 are good, and how many authorities agree. (Patch from shibz.)
34910 o Minor features (hidden services):
34911 - Allow multiple HiddenServicePort directives with the same virtual
34912 port; when they occur, the user is sent round-robin to one
34913 of the target ports chosen at random. Partially fixes bug 393 by
34914 adding limited ad-hoc round-robining.
34916 o Minor features (other):
34918 - Add a new AutomapHostsOnResolve option: when it is enabled, any
34919 resolve request for hosts matching a given pattern causes Tor to
34920 generate an internal virtual address mapping for that host. This
34921 allows DNSPort to work sensibly with hidden service users. By
34922 default, .exit and .onion addresses are remapped; the list of
34923 patterns can be reconfigured with AutomapHostsSuffixes.
34924 - Add an "-F" option to tor-resolve to force a resolve for a .onion
34925 address. Thanks to the AutomapHostsOnResolve option, this is no
34926 longer a completely silly thing to do.
34927 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
34928 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
34929 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
34930 minus 1 byte: the actual maximum declared bandwidth.
34932 o Removed features:
34933 - Removed support for the old binary "version 0" controller protocol.
34934 This has been deprecated since 0.1.1, and warnings have been issued
34935 since 0.1.2. When we encounter a v0 control message, we now send
34936 back an error and close the connection.
34937 - Remove the old "dns worker" server DNS code: it hasn't been default
34938 since 0.1.2.2-alpha, and all the servers seem to be using the new
34941 o Minor bugfixes (portability):
34942 - Even though Windows is equally happy with / and \ as path separators,
34943 try to use \ consistently on Windows and / consistently on Unix: it
34944 makes the log messages nicer.
34945 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
34946 - Read resolv.conf files correctly on platforms where read() returns
34947 partial results on small file reads.
34949 o Minor bugfixes (directory):
34950 - Correctly enforce that elements of directory objects do not appear
34951 more often than they are allowed to appear.
34952 - When we are reporting the DirServer line we just parsed, we were
34953 logging the second stanza of the key fingerprint, not the first.
34955 o Minor bugfixes (logging):
34956 - When we hit an EOF on a log (probably because we're shutting down),
34957 don't try to remove the log from the list: just mark it as
34958 unusable. (Bulletproofs against bug 222.)
34960 o Minor bugfixes (other):
34961 - In the exitlist script, only consider the most recently published
34962 server descriptor for each server. Also, when the user requests
34963 a list of servers that _reject_ connections to a given address,
34964 explicitly exclude the IPs that also have servers that accept
34965 connections to that address. (Resolves bug 405.)
34966 - Stop allowing hibernating servers to be "stable" or "fast".
34967 - On Windows, we were preventing other processes from reading
34968 cached-routers while Tor was running. (Reported by janbar)
34969 - Make the NodeFamilies config option work. (Reported by
34970 lodger -- it has never actually worked, even though we added it
34972 - Check return values from pthread_mutex functions.
34973 - Don't save non-general-purpose router descriptors to the disk cache,
34974 because we have no way of remembering what their purpose was when
34976 - Add even more asserts to hunt down bug 417.
34977 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
34978 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
34979 Add a log message to confirm that it is in fact unlikely.
34981 o Minor bugfixes (controller):
34982 - Make 'getinfo fingerprint' return a 551 error if we're not a
34983 server, so we match what the control spec claims we do. Reported
34985 - Fix a typo in an error message when extendcircuit fails that
34986 caused us to not follow the \r\n-based delimiter protocol. Reported
34989 o Code simplifications and refactoring:
34990 - Stop passing around circuit_t and crypt_path_t pointers that are
34991 implicit in other procedure arguments.
34992 - Drop the old code to choke directory connections when the
34993 corresponding OR connections got full: thanks to the cell queue
34994 feature, OR conns don't get full any more.
34995 - Make dns_resolve() handle attaching connections to circuits
34996 properly, so the caller doesn't have to.
34997 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
34998 - Keep the connection array as a dynamic smartlist_t, rather than as
34999 a fixed-sized array. This is important, as the number of connections
35000 is becoming increasingly decoupled from the number of sockets.
35003 Changes in version 0.1.2.14 - 2007-05-25
35004 Tor 0.1.2.14 changes the addresses of two directory authorities (this
35005 change especially affects those who serve or use hidden services),
35006 and fixes several other crash- and security-related bugs.
35008 o Directory authority changes:
35009 - Two directory authorities (moria1 and moria2) just moved to new
35010 IP addresses. This change will particularly affect those who serve
35011 or use hidden services.
35013 o Major bugfixes (crashes):
35014 - If a directory server runs out of space in the connection table
35015 as it's processing a begin_dir request, it will free the exit stream
35016 but leave it attached to the circuit, leading to unpredictable
35017 behavior. (Reported by seeess, fixes bug 425.)
35018 - Fix a bug in dirserv_remove_invalid() that would cause authorities
35019 to corrupt memory under some really unlikely scenarios.
35020 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
35021 - Avoid segfaults when reading from mmaped descriptor file. (Reported
35024 o Major bugfixes (security):
35025 - When choosing an entry guard for a circuit, avoid using guards
35026 that are in the same family as the chosen exit -- not just guards
35027 that are exactly the chosen exit. (Reported by lodger.)
35029 o Major bugfixes (resource management):
35030 - If a directory authority is down, skip it when deciding where to get
35031 networkstatus objects or descriptors. Otherwise we keep asking
35032 every 10 seconds forever. Fixes bug 384.
35033 - Count it as a failure if we fetch a valid network-status but we
35034 don't want to keep it. Otherwise we'll keep fetching it and keep
35035 not wanting to keep it. Fixes part of bug 422.
35036 - If all of our dirservers have given us bad or no networkstatuses
35037 lately, then stop hammering them once per minute even when we
35038 think they're failed. Fixes another part of bug 422.
35041 - Actually set the purpose correctly for descriptors inserted with
35042 purpose=controller.
35043 - When we have k non-v2 authorities in our DirServer config,
35044 we ignored the last k authorities in the list when updating our
35046 - Correctly back-off from requesting router descriptors that we are
35047 having a hard time downloading.
35048 - Read resolv.conf files correctly on platforms where read() returns
35049 partial results on small file reads.
35050 - Don't rebuild the entire router store every time we get 32K of
35051 routers: rebuild it when the journal gets very large, or when
35052 the gaps in the store get very large.
35055 - When routers publish SVN revisions in their router descriptors,
35056 authorities now include those versions correctly in networkstatus
35058 - Warn when using a version of libevent before 1.3b to run a server on
35059 OSX or BSD: these versions interact badly with userspace threads.
35062 Changes in version 0.1.2.13 - 2007-04-24
35063 This release features some major anonymity fixes, such as safer path
35064 selection; better client performance; faster bootstrapping, better
35065 address detection, and better DNS support for servers; write limiting as
35066 well as read limiting to make servers easier to run; and a huge pile of
35067 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
35069 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
35070 of the Freenode IRC network, remembering his patience and vision for
35071 free speech on the Internet.
35074 - Fix a memory leak when we ask for "all" networkstatuses and we
35075 get one we don't recognize.
35076 - Add more asserts to hunt down bug 417.
35077 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
35080 Changes in version 0.1.2.12-rc - 2007-03-16
35082 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
35083 directory information requested inside Tor connections (i.e. via
35084 begin_dir cells). It only triggered when the same connection was
35085 serving other data at the same time. Reported by seeess.
35088 - When creating a circuit via the controller, send a 'launched'
35089 event when we're done, so we follow the spec better.
35092 Changes in version 0.1.2.11-rc - 2007-03-15
35093 o Minor bugfixes (controller), reported by daejees:
35094 - Correct the control spec to match how the code actually responds
35095 to 'getinfo addr-mappings/*'.
35096 - The control spec described a GUARDS event, but the code
35097 implemented a GUARD event. Standardize on GUARD, but let people
35098 ask for GUARDS too.
35101 Changes in version 0.1.2.10-rc - 2007-03-07
35102 o Major bugfixes (Windows):
35103 - Do not load the NT services library functions (which may not exist)
35104 just to detect if we're a service trying to shut down. Now we run
35105 on Win98 and friends again.
35107 o Minor bugfixes (other):
35108 - Clarify a couple of log messages.
35109 - Fix a misleading socks5 error number.
35112 Changes in version 0.1.2.9-rc - 2007-03-02
35113 o Major bugfixes (Windows):
35114 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
35115 of the usual GCC "%llu". This prevents a bug when saving 64-bit
35116 int configuration values: the high-order 32 bits would get
35117 truncated. In particular, we were being bitten by the default
35118 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
35119 and maybe also bug 397.)
35121 o Minor bugfixes (performance):
35122 - Use OpenSSL's AES implementation on platforms where it's faster.
35123 This could save us as much as 10% CPU usage.
35125 o Minor bugfixes (server):
35126 - Do not rotate onion key immediately after setting it for the first
35129 o Minor bugfixes (directory authorities):
35130 - Stop calling servers that have been hibernating for a long time
35131 "stable". Also, stop letting hibernating or obsolete servers affect
35132 uptime and bandwidth cutoffs.
35133 - Stop listing hibernating servers in the v1 directory.
35135 o Minor bugfixes (hidden services):
35136 - Upload hidden service descriptors slightly less often, to reduce
35137 load on authorities.
35139 o Minor bugfixes (other):
35140 - Fix an assert that could trigger if a controller quickly set then
35141 cleared EntryNodes. Bug found by Udo van den Heuvel.
35142 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
35144 - Fix a potential race condition in the rpm installer. Found by
35146 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
35147 of 2 as indicating that the server is completely bad; it sometimes
35148 means that the server is just bad for the request in question. (may fix
35149 the last of bug 326.)
35150 - Disable encrypted directory connections when we don't have a server
35151 descriptor for the destination. We'll get this working again in
35155 Changes in version 0.1.2.8-beta - 2007-02-26
35156 o Major bugfixes (crashes):
35157 - Stop crashing when the controller asks us to resetconf more than
35158 one config option at once. (Vidalia 0.0.11 does this.)
35159 - Fix a crash that happened on Win98 when we're given command-line
35160 arguments: don't try to load NT service functions from advapi32.dll
35161 except when we need them. (Bug introduced in 0.1.2.7-alpha;
35163 - Fix a longstanding obscure crash bug that could occur when
35164 we run out of DNS worker processes. (Resolves bug 390.)
35166 o Major bugfixes (hidden services):
35167 - Correctly detect whether hidden service descriptor downloads are
35168 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
35170 o Major bugfixes (accounting):
35171 - When we start during an accounting interval before it's time to wake
35172 up, remember to wake up at the correct time. (May fix bug 342.)
35174 o Minor bugfixes (controller):
35175 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
35176 clear the corresponding on_circuit variable, and remember later
35177 that we don't need to send a redundant CLOSED event. Resolves part
35179 - Report events where a resolve succeeded or where we got a socks
35180 protocol error correctly, rather than calling both of them
35182 - Change reported stream target addresses to IP consistently when
35183 we finally get the IP from an exit node.
35184 - Send log messages to the controller even if they happen to be very
35187 o Minor bugfixes (other):
35188 - Display correct results when reporting which versions are
35189 recommended, and how recommended they are. (Resolves bug 383.)
35190 - Improve our estimates for directory bandwidth to be less random:
35191 guess that an unrecognized directory will have the average bandwidth
35192 from all known directories, not that it will have the average
35193 bandwidth from those directories earlier than it on the list.
35194 - If we start a server with ClientOnly 1, then set ClientOnly to 0
35195 and hup, stop triggering an assert based on an empty onion_key.
35196 - On platforms with no working mmap() equivalent, don't warn the
35197 user when cached-routers doesn't exist.
35198 - Warn the user when mmap() [or its equivalent] fails for some reason
35199 other than file-not-found.
35200 - Don't warn the user when cached-routers.new doesn't exist: that's
35201 perfectly fine when starting up for the first time.
35202 - When EntryNodes are configured, rebuild the guard list to contain,
35203 in order: the EntryNodes that were guards before; the rest of the
35204 EntryNodes; the nodes that were guards before.
35205 - Mask out all signals in sub-threads; only the libevent signal
35206 handler should be processing them. This should prevent some crashes
35207 on some machines using pthreads. (Patch from coderman.)
35208 - Fix switched arguments on memset in the implementation of
35209 tor_munmap() for systems with no mmap() call.
35210 - When Tor receives a router descriptor that it asked for, but
35211 no longer wants (because it has received fresh networkstatuses
35212 in the meantime), do not warn the user. Cache the descriptor if
35213 we're a cache; drop it if we aren't.
35214 - Make earlier entry guards _really_ get retried when the network
35216 - On a malformed DNS reply, always give an error to the corresponding
35218 - Build with recent libevents on platforms that do not define the
35219 nonstandard types "u_int8_t" and friends.
35221 o Minor features (controller):
35222 - Warn the user when an application uses the obsolete binary v0
35223 control protocol. We're planning to remove support for it during
35224 the next development series, so it's good to give people some
35226 - Add STREAM_BW events to report per-entry-stream bandwidth
35227 use. (Patch from Robert Hogan.)
35228 - Rate-limit SIGNEWNYM signals in response to controllers that
35229 impolitely generate them for every single stream. (Patch from
35230 mwenge; closes bug 394.)
35231 - Make REMAP stream events have a SOURCE (cache or exit), and
35232 make them generated in every case where we get a successful
35233 connected or resolved cell.
35235 o Minor bugfixes (performance):
35236 - Call router_have_min_dir_info half as often. (This is showing up in
35237 some profiles, but not others.)
35238 - When using GCC, make log_debug never get called at all, and its
35239 arguments never get evaluated, when no debug logs are configured.
35240 (This is showing up in some profiles, but not others.)
35243 - Remove some never-implemented options. Mark PathlenCoinWeight as
35245 - Implement proposal 106: Stop requiring clients to have well-formed
35246 certificates; stop checking nicknames in certificates. (Clients
35247 have certificates so that they can look like Tor servers, but in
35248 the future we might want to allow them to look like regular TLS
35249 clients instead. Nicknames in certificates serve no purpose other
35250 than making our protocol easier to recognize on the wire.)
35251 - Revise messages on handshake failure again to be even more clear about
35252 which are incoming connections and which are outgoing.
35253 - Discard any v1 directory info that's over 1 month old (for
35254 directories) or over 1 week old (for running-routers lists).
35255 - Do not warn when individual nodes in the configuration's EntryNodes,
35256 ExitNodes, etc are down: warn only when all possible nodes
35257 are down. (Fixes bug 348.)
35258 - Always remove expired routers and networkstatus docs before checking
35259 whether we have enough information to build circuits. (Fixes
35261 - Put a lower-bound on MaxAdvertisedBandwidth.
35264 Changes in version 0.1.2.7-alpha - 2007-02-06
35265 o Major bugfixes (rate limiting):
35266 - Servers decline directory requests much more aggressively when
35267 they're low on bandwidth. Otherwise they end up queueing more and
35268 more directory responses, which can't be good for latency.
35269 - But never refuse directory requests from local addresses.
35270 - Fix a memory leak when sending a 503 response for a networkstatus
35272 - Be willing to read or write on local connections (e.g. controller
35273 connections) even when the global rate limiting buckets are empty.
35274 - If our system clock jumps back in time, don't publish a negative
35275 uptime in the descriptor. Also, don't let the global rate limiting
35276 buckets go absurdly negative.
35277 - Flush local controller connection buffers periodically as we're
35278 writing to them, so we avoid queueing 4+ megabytes of data before
35281 o Major bugfixes (NT services):
35282 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35283 command-line flag so that admins can override the default by saying
35284 "tor --service install --user "SomeUser"". This will not affect
35285 existing installed services. Also, warn the user that the service
35286 will look for its configuration file in the service user's
35287 %appdata% directory. (We can't do the 'hardwire the user's appdata
35288 directory' trick any more, since we may not have read access to that
35291 o Major bugfixes (other):
35292 - Previously, we would cache up to 16 old networkstatus documents
35293 indefinitely, if they came from nontrusted authorities. Now we
35294 discard them if they are more than 10 days old.
35295 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35297 - Detect and reject malformed DNS responses containing circular
35299 - If exits are rare enough that we're not marking exits as guards,
35300 ignore exit bandwidth when we're deciding the required bandwidth
35302 - When we're handling a directory connection tunneled over Tor,
35303 don't fill up internal memory buffers with all the data we want
35304 to tunnel; instead, only add it if the OR connection that will
35305 eventually receive it has some room for it. (This can lead to
35306 slowdowns in tunneled dir connections; a better solution will have
35307 to wait for 0.2.0.)
35309 o Minor bugfixes (dns):
35310 - Add some defensive programming to eventdns.c in an attempt to catch
35311 possible memory-stomping bugs.
35312 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35313 an incorrect number of bytes. (Previously, we would ignore the
35315 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35316 in the correct order, and doesn't crash.
35317 - Free memory held in recently-completed DNS lookup attempts on exit.
35318 This was not a memory leak, but may have been hiding memory leaks.
35319 - Handle TTL values correctly on reverse DNS lookups.
35320 - Treat failure to parse resolv.conf as an error.
35322 o Minor bugfixes (other):
35323 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35324 - When computing clock skew from directory HTTP headers, consider what
35325 time it was when we finished asking for the directory, not what
35327 - Expire socks connections if they spend too long waiting for the
35328 handshake to finish. Previously we would let them sit around for
35329 days, if the connecting application didn't close them either.
35330 - And if the socks handshake hasn't started, don't send a
35331 "DNS resolve socks failed" handshake reply; just close it.
35332 - Stop using C functions that OpenBSD's linker doesn't like.
35333 - Don't launch requests for descriptors unless we have networkstatuses
35334 from at least half of the authorities. This delays the first
35335 download slightly under pathological circumstances, but can prevent
35336 us from downloading a bunch of descriptors we don't need.
35337 - Do not log IPs with TLS failures for incoming TLS
35338 connections. (Fixes bug 382.)
35339 - If the user asks to use invalid exit nodes, be willing to use
35341 - Stop using the reserved ac_cv namespace in our configure script.
35342 - Call stat() slightly less often; use fstat() when possible.
35343 - Refactor the way we handle pending circuits when an OR connection
35344 completes or fails, in an attempt to fix a rare crash bug.
35345 - Only rewrite a conn's address based on X-Forwarded-For: headers
35346 if it's a parseable public IP address; and stop adding extra quotes
35347 to the resulting address.
35350 - Weight directory requests by advertised bandwidth. Now we can
35351 let servers enable write limiting but still allow most clients to
35352 succeed at their directory requests. (We still ignore weights when
35353 choosing a directory authority; I hope this is a feature.)
35356 - Create a new file ReleaseNotes which was the old ChangeLog. The
35357 new ChangeLog file now includes the summaries for all development
35359 - Check for addresses with invalid characters at the exit as well
35360 as at the client, and warn less verbosely when they fail. You can
35361 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35362 - Adapt a patch from goodell to let the contrib/exitlist script
35363 take arguments rather than require direct editing.
35364 - Inform the server operator when we decide not to advertise a
35365 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35366 was confusing Zax, so now we're hopefully more helpful.
35367 - Bring us one step closer to being able to establish an encrypted
35368 directory tunnel without knowing a descriptor first. Still not
35369 ready yet. As part of the change, now assume we can use a
35370 create_fast cell if we don't know anything about a router.
35371 - Allow exit nodes to use nameservers running on ports other than 53.
35372 - Servers now cache reverse DNS replies.
35373 - Add an --ignore-missing-torrc command-line option so that we can
35374 get the "use sensible defaults if the configuration file doesn't
35375 exist" behavior even when specifying a torrc location on the command
35378 o Minor features (controller):
35379 - Track reasons for OR connection failure; make these reasons
35380 available via the controller interface. (Patch from Mike Perry.)
35381 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35382 can learn when clients are sending malformed hostnames to Tor.
35383 - Clean up documentation for controller status events.
35384 - Add a REMAP status to stream events to note that a stream's
35385 address has changed because of a cached address or a MapAddress
35389 Changes in version 0.1.2.6-alpha - 2007-01-09
35391 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35392 connection handles more than 4 gigs in either direction, we crash.
35393 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35394 advertised exit node, somebody might try to exit from us when
35395 we're bootstrapping and before we've built our descriptor yet.
35396 Refuse the connection rather than crashing.
35399 - Warn if we (as a server) find that we've resolved an address that we
35400 weren't planning to resolve.
35401 - Warn that using select() on any libevent version before 1.1 will be
35402 unnecessarily slow (even for select()).
35403 - Flush ERR-level controller status events just like we currently
35404 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35405 the controller from learning about current events.
35407 o Minor features (more controller status events):
35408 - Implement EXTERNAL_ADDRESS server status event so controllers can
35409 learn when our address changes.
35410 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35411 can learn when directories reject our descriptor.
35412 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35413 can learn when a client application is speaking a non-socks protocol
35415 - Implement DANGEROUS_SOCKS client status event so controllers
35416 can learn when a client application is leaking DNS addresses.
35417 - Implement BUG general status event so controllers can learn when
35418 Tor is unhappy about its internal invariants.
35419 - Implement CLOCK_SKEW general status event so controllers can learn
35420 when Tor thinks the system clock is set incorrectly.
35421 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35422 server status events so controllers can learn when their descriptors
35423 are accepted by a directory.
35424 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35425 server status events so controllers can learn about Tor's progress in
35426 deciding whether it's reachable from the outside.
35427 - Implement BAD_LIBEVENT general status event so controllers can learn
35428 when we have a version/method combination in libevent that needs to
35430 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35431 and DNS_USELESS server status events so controllers can learn
35432 about changes to DNS server status.
35434 o Minor features (directory):
35435 - Authorities no longer recommend exits as guards if this would shift
35436 too much load to the exit nodes.
35439 Changes in version 0.1.2.5-alpha - 2007-01-06
35441 - Enable write limiting as well as read limiting. Now we sacrifice
35442 capacity if we're pushing out lots of directory traffic, rather
35443 than overrunning the user's intended bandwidth limits.
35444 - Include TLS overhead when counting bandwidth usage; previously, we
35445 would count only the bytes sent over TLS, but not the bytes used
35447 - Support running the Tor service with a torrc not in the same
35448 directory as tor.exe and default to using the torrc located in
35449 the %appdata%\Tor\ of the user who installed the service. Patch
35451 - Servers now check for the case when common DNS requests are going to
35452 wildcarded addresses (i.e. all getting the same answer), and change
35453 their exit policy to reject *:* if it's happening.
35454 - Implement BEGIN_DIR cells, so we can connect to the directory
35455 server via TLS to do encrypted directory requests rather than
35456 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
35457 config options if you like.
35459 o Minor features (config and docs):
35460 - Start using the state file to store bandwidth accounting data:
35461 the bw_accounting file is now obsolete. We'll keep generating it
35462 for a while for people who are still using 0.1.2.4-alpha.
35463 - Try to batch changes to the state file so that we do as few
35464 disk writes as possible while still storing important things in
35466 - The state file and the bw_accounting file get saved less often when
35467 the AvoidDiskWrites config option is set.
35468 - Make PIDFile work on Windows (untested).
35469 - Add internal descriptions for a bunch of configuration options:
35470 accessible via controller interface and in comments in saved
35472 - Reject *:563 (NNTPS) in the default exit policy. We already reject
35473 NNTP by default, so this seems like a sensible addition.
35474 - Clients now reject hostnames with invalid characters. This should
35475 avoid some inadvertent info leaks. Add an option
35476 AllowNonRFC953Hostnames to disable this behavior, in case somebody
35477 is running a private network with hosts called @, !, and #.
35478 - Add a maintainer script to tell us which options are missing
35479 documentation: "make check-docs".
35480 - Add a new address-spec.txt document to describe our special-case
35481 addresses: .exit, .onion, and .noconnnect.
35483 o Minor features (DNS):
35484 - Ongoing work on eventdns infrastructure: now it has dns server
35485 and ipv6 support. One day Tor will make use of it.
35486 - Add client-side caching for reverse DNS lookups.
35487 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
35488 - When we change nameservers or IP addresses, reset and re-launch
35489 our tests for DNS hijacking.
35491 o Minor features (directory):
35492 - Authorities now specify server versions in networkstatus. This adds
35493 about 2% to the size of compressed networkstatus docs, and allows
35494 clients to tell which servers support BEGIN_DIR and which don't.
35495 The implementation is forward-compatible with a proposed future
35496 protocol version scheme not tied to Tor versions.
35497 - DirServer configuration lines now have an orport= option so
35498 clients can open encrypted tunnels to the authorities without
35499 having downloaded their descriptors yet. Enabled for moria1,
35500 moria2, tor26, and lefkada now in the default configuration.
35501 - Directory servers are more willing to send a 503 "busy" if they
35502 are near their write limit, especially for v1 directory requests.
35503 Now they can use their limited bandwidth for actual Tor traffic.
35504 - Clients track responses with status 503 from dirservers. After a
35505 dirserver has given us a 503, we try not to use it until an hour has
35506 gone by, or until we have no dirservers that haven't given us a 503.
35507 - When we get a 503 from a directory, and we're not a server, we don't
35508 count the failure against the total number of failures allowed
35509 for the thing we're trying to download.
35510 - Report X-Your-Address-Is correctly from tunneled directory
35511 connections; don't report X-Your-Address-Is when it's an internal
35512 address; and never believe reported remote addresses when they're
35514 - Protect against an unlikely DoS attack on directory servers.
35515 - Add a BadDirectory flag to network status docs so that authorities
35516 can (eventually) tell clients about caches they believe to be
35519 o Minor features (controller):
35520 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
35521 - Reimplement GETINFO so that info/names stays in sync with the
35523 - Implement "GETINFO fingerprint".
35524 - Implement "SETEVENTS GUARD" so controllers can get updates on
35525 entry guard status as it changes.
35527 o Minor features (clean up obsolete pieces):
35528 - Remove some options that have been deprecated since at least
35529 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
35530 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
35531 to set log options.
35532 - We no longer look for identity and onion keys in "identity.key" and
35533 "onion.key" -- these were replaced by secret_id_key and
35534 secret_onion_key in 0.0.8pre1.
35535 - We no longer require unrecognized directory entries to be
35538 o Major bugfixes (security):
35539 - Stop sending the HttpProxyAuthenticator string to directory
35540 servers when directory connections are tunnelled through Tor.
35541 - Clients no longer store bandwidth history in the state file.
35542 - Do not log introduction points for hidden services if SafeLogging
35544 - When generating bandwidth history, round down to the nearest
35545 1k. When storing accounting data, round up to the nearest 1k.
35546 - When we're running as a server, remember when we last rotated onion
35547 keys, so that we will rotate keys once they're a week old even if
35548 we never stay up for a week ourselves.
35550 o Major bugfixes (other):
35551 - Fix a longstanding bug in eventdns that prevented the count of
35552 timed-out resolves from ever being reset. This bug caused us to
35553 give up on a nameserver the third time it timed out, and try it
35554 10 seconds later... and to give up on it every time it timed out
35556 - Take out the '5 second' timeout from the connection retry
35557 schedule. Now the first connect attempt will wait a full 10
35558 seconds before switching to a new circuit. Perhaps this will help
35559 a lot. Based on observations from Mike Perry.
35560 - Fix a bug on the Windows implementation of tor_mmap_file() that
35561 would prevent the cached-routers file from ever loading. Reported
35565 - Fix an assert failure when a directory authority sets
35566 AuthDirRejectUnlisted and then receives a descriptor from an
35567 unlisted router. Reported by seeess.
35568 - Avoid a double-free when parsing malformed DirServer lines.
35569 - Fix a bug when a BSD-style PF socket is first used. Patch from
35571 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35572 to resolve an address at a given exit node even when they ask for
35574 - Servers no longer ever list themselves in their "family" line,
35575 even if configured to do so. This makes it easier to configure
35576 family lists conveniently.
35577 - When running as a server, don't fall back to 127.0.0.1 when no
35578 nameservers are configured in /etc/resolv.conf; instead, make the
35579 user fix resolv.conf or specify nameservers explicitly. (Resolves
35581 - Stop accepting certain malformed ports in configured exit policies.
35582 - Don't re-write the fingerprint file every restart, unless it has
35584 - Stop warning when a single nameserver fails: only warn when _all_ of
35585 our nameservers have failed. Also, when we only have one nameserver,
35586 raise the threshold for deciding that the nameserver is dead.
35587 - Directory authorities now only decide that routers are reachable
35588 if their identity keys are as expected.
35589 - When the user uses bad syntax in the Log config line, stop
35590 suggesting other bad syntax as a replacement.
35591 - Correctly detect ipv6 DNS capability on OpenBSD.
35593 o Minor bugfixes (controller):
35594 - Report the circuit number correctly in STREAM CLOSED events. Bug
35595 reported by Mike Perry.
35596 - Do not report bizarre values for results of accounting GETINFOs
35597 when the last second's write or read exceeds the allotted bandwidth.
35598 - Report "unrecognized key" rather than an empty string when the
35599 controller tries to fetch a networkstatus that doesn't exist.
35602 Changes in version 0.1.1.26 - 2006-12-14
35603 o Security bugfixes:
35604 - Stop sending the HttpProxyAuthenticator string to directory
35605 servers when directory connections are tunnelled through Tor.
35606 - Clients no longer store bandwidth history in the state file.
35607 - Do not log introduction points for hidden services if SafeLogging
35611 - Fix an assert failure when a directory authority sets
35612 AuthDirRejectUnlisted and then receives a descriptor from an
35613 unlisted router (reported by seeess).
35616 Changes in version 0.1.2.4-alpha - 2006-12-03
35618 - Add support for using natd; this allows FreeBSDs earlier than
35619 5.1.2 to have ipfw send connections through Tor without using
35620 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
35623 - Make all connections to addresses of the form ".noconnect"
35624 immediately get closed. This lets application/controller combos
35625 successfully test whether they're talking to the same Tor by
35626 watching for STREAM events.
35627 - Make cross.sh cross-compilation script work even when autogen.sh
35628 hasn't been run. (Patch from Michael Mohr.)
35629 - Statistics dumped by -USR2 now include a breakdown of public key
35630 operations, for profiling.
35633 - Fix a major leak when directory authorities parse their
35634 approved-routers list, a minor memory leak when we fail to pick
35635 an exit node, and a few rare leaks on errors.
35636 - Handle TransPort connections even when the server sends data before
35637 the client sends data. Previously, the connection would just hang
35638 until the client sent data. (Patch from tup based on patch from
35640 - Avoid assert failure when our cached-routers file is empty on
35644 - Don't log spurious warnings when we see a circuit close reason we
35645 don't recognize; it's probably just from a newer version of Tor.
35646 - Have directory authorities allow larger amounts of drift in uptime
35647 without replacing the server descriptor: previously, a server that
35648 restarted every 30 minutes could have 48 "interesting" descriptors
35650 - Start linking to the Tor specification and Tor reference manual
35651 correctly in the Windows installer.
35652 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35653 Tor/Privoxy we also uninstall Vidalia.
35654 - Resume building on Irix64, and fix a lot of warnings from its
35655 MIPSpro C compiler.
35656 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
35657 when we're running as a client.
35660 Changes in version 0.1.1.25 - 2006-11-04
35662 - When a client asks us to resolve (rather than connect to)
35663 an address, and we have a cached answer, give them the cached
35664 answer. Previously, we would give them no answer at all.
35665 - We were building exactly the wrong circuits when we predict
35666 hidden service requirements, meaning Tor would have to build all
35667 its circuits on demand.
35668 - If none of our live entry guards have a high uptime, but we
35669 require a guard with a high uptime, try adding a new guard before
35670 we give up on the requirement. This patch should make long-lived
35671 connections more stable on average.
35672 - When testing reachability of our DirPort, don't launch new
35673 tests when there's already one in progress -- unreachable
35674 servers were stacking up dozens of testing streams.
35676 o Security bugfixes:
35677 - When the user sends a NEWNYM signal, clear the client-side DNS
35678 cache too. Otherwise we continue to act on previous information.
35681 - Avoid a memory corruption bug when creating a hash table for
35683 - Avoid possibility of controller-triggered crash when misusing
35684 certain commands from a v0 controller on platforms that do not
35685 handle printf("%s",NULL) gracefully.
35686 - Avoid infinite loop on unexpected controller input.
35687 - Don't log spurious warnings when we see a circuit close reason we
35688 don't recognize; it's probably just from a newer version of Tor.
35689 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35690 Tor/Privoxy we also uninstall Vidalia.
35693 Changes in version 0.1.2.3-alpha - 2006-10-29
35695 - Prepare for servers to publish descriptors less often: never
35696 discard a descriptor simply for being too old until either it is
35697 recommended by no authorities, or until we get a better one for
35698 the same router. Make caches consider retaining old recommended
35699 routers for even longer.
35700 - If most authorities set a BadExit flag for a server, clients
35701 don't think of it as a general-purpose exit. Clients only consider
35702 authorities that advertise themselves as listing bad exits.
35703 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
35704 headers for content, so that we can work better in the presence of
35705 caching HTTP proxies.
35706 - Allow authorities to list nodes as bad exits by fingerprint or by
35709 o Minor features, controller:
35710 - Add a REASON field to CIRC events; for backward compatibility, this
35711 field is sent only to controllers that have enabled the extended
35712 event format. Also, add additional reason codes to explain why
35713 a given circuit has been destroyed or truncated. (Patches from
35715 - Add a REMOTE_REASON field to extended CIRC events to tell the
35716 controller about why a remote OR told us to close a circuit.
35717 - Stream events also now have REASON and REMOTE_REASON fields,
35718 working much like those for circuit events.
35719 - There's now a GETINFO ns/... field so that controllers can ask Tor
35720 about the current status of a router.
35721 - A new event type "NS" to inform a controller when our opinion of
35722 a router's status has changed.
35723 - Add a GETINFO events/names and GETINFO features/names so controllers
35724 can tell which events and features are supported.
35725 - A new CLEARDNSCACHE signal to allow controllers to clear the
35726 client-side DNS cache without expiring circuits.
35728 o Security bugfixes:
35729 - When the user sends a NEWNYM signal, clear the client-side DNS
35730 cache too. Otherwise we continue to act on previous information.
35733 - Avoid sending junk to controllers or segfaulting when a controller
35734 uses EVENT_NEW_DESC with verbose nicknames.
35735 - Stop triggering asserts if the controller tries to extend hidden
35736 service circuits (reported by mwenge).
35737 - Avoid infinite loop on unexpected controller input.
35738 - When the controller does a "GETINFO network-status", tell it
35739 about even those routers whose descriptors are very old, and use
35740 long nicknames where appropriate.
35741 - Change NT service functions to be loaded on demand. This lets us
35742 build with MinGW without breaking Tor for Windows 98 users.
35743 - Do DirPort reachability tests less often, since a single test
35744 chews through many circuits before giving up.
35745 - In the hidden service example in torrc.sample, stop recommending
35746 esoteric and discouraged hidden service options.
35747 - When stopping an NT service, wait up to 10 sec for it to actually
35748 stop. Patch from Matt Edman; resolves bug 295.
35749 - Fix handling of verbose nicknames with ORCONN controller events:
35750 make them show up exactly when requested, rather than exactly when
35752 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
35753 printing a duplicate "$" in the keys we send (reported by mwenge).
35754 - Correctly set maximum connection limit on Cygwin. (This time
35756 - Try to detect Windows correctly when cross-compiling.
35757 - Detect the size of the routers file correctly even if it is
35758 corrupted (on systems without mmap) or not page-aligned (on systems
35759 with mmap). This bug was harmless.
35760 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
35761 to open a stream fails; now we do in more cases. This should
35762 make clients able to find a good exit faster in some cases, since
35763 unhandleable requests will now get an error rather than timing out.
35764 - Resolve two memory leaks when rebuilding the on-disk router cache
35765 (reported by fookoowa).
35766 - Clean up minor code warnings suggested by the MIPSpro C compiler,
35767 and reported by some Centos users.
35768 - Controller signals now work on non-Unix platforms that don't define
35769 SIGUSR1 and SIGUSR2 the way we expect.
35770 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
35771 values before failing, and always enables eventdns.
35772 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
35773 Try to fix this in configure.in by checking for most functions
35774 before we check for libevent.
35777 Changes in version 0.1.2.2-alpha - 2006-10-07
35779 - Make our async eventdns library on-by-default for Tor servers,
35780 and plan to deprecate the separate dnsworker threads.
35781 - Add server-side support for "reverse" DNS lookups (using PTR
35782 records so clients can determine the canonical hostname for a given
35783 IPv4 address). Only supported by servers using eventdns; servers
35784 now announce in their descriptors whether they support eventdns.
35785 - Specify and implement client-side SOCKS5 interface for reverse DNS
35786 lookups (see doc/socks-extensions.txt).
35787 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
35788 connect to directory servers through Tor. Previously, clients needed
35789 to find Tor exits to make private connections to directory servers.
35790 - Avoid choosing Exit nodes for entry or middle hops when the
35791 total bandwidth available from non-Exit nodes is much higher than
35792 the total bandwidth available from Exit nodes.
35793 - Workaround for name servers (like Earthlink's) that hijack failing
35794 DNS requests and replace the no-such-server answer with a "helpful"
35795 redirect to an advertising-driven search portal. Also work around
35796 DNS hijackers who "helpfully" decline to hijack known-invalid
35797 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
35798 lets you turn it off.
35799 - Send out a burst of long-range padding cells once we've established
35800 that we're reachable. Spread them over 4 circuits, so hopefully
35801 a few will be fast. This exercises our bandwidth and bootstraps
35802 us into the directory more quickly.
35804 o New/improved config options:
35805 - Add new config option "ResolvConf" to let the server operator
35806 choose an alternate resolve.conf file when using eventdns.
35807 - Add an "EnforceDistinctSubnets" option to control our "exclude
35808 servers on the same /16" behavior. It's still on by default; this
35809 is mostly for people who want to operate private test networks with
35810 all the machines on the same subnet.
35811 - If one of our entry guards is on the ExcludeNodes list, or the
35812 directory authorities don't think it's a good guard, treat it as
35813 if it were unlisted: stop using it as a guard, and throw it off
35814 the guards list if it stays that way for a long time.
35815 - Allow directory authorities to be marked separately as authorities
35816 for the v1 directory protocol, the v2 directory protocol, and
35817 as hidden service directories, to make it easier to retire old
35818 authorities. V1 authorities should set "HSAuthoritativeDir 1"
35819 to continue being hidden service authorities too.
35820 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
35822 o Minor features, controller:
35823 - Fix CIRC controller events so that controllers can learn the
35824 identity digests of non-Named servers used in circuit paths.
35825 - Let controllers ask for more useful identifiers for servers. Instead
35826 of learning identity digests for un-Named servers and nicknames
35827 for Named servers, the new identifiers include digest, nickname,
35828 and indication of Named status. Off by default; see control-spec.txt
35829 for more information.
35830 - Add a "getinfo address" controller command so it can display Tor's
35831 best guess to the user.
35832 - New controller event to alert the controller when our server
35833 descriptor has changed.
35834 - Give more meaningful errors on controller authentication failure.
35836 o Minor features, other:
35837 - When asked to resolve a hostname, don't use non-exit servers unless
35838 requested to do so. This allows servers with broken DNS to be
35839 useful to the network.
35840 - Divide eventdns log messages into warn and info messages.
35841 - Reserve the nickname "Unnamed" for routers that can't pick
35842 a hostname: any router can call itself Unnamed; directory
35843 authorities will never allocate Unnamed to any particular router;
35844 clients won't believe that any router is the canonical Unnamed.
35845 - Only include function names in log messages for info/debug messages.
35846 For notice/warn/err, the content of the message should be clear on
35847 its own, and printing the function name only confuses users.
35848 - Avoid some false positives during reachability testing: don't try
35849 to test via a server that's on the same /24 as us.
35850 - If we fail to build a circuit to an intended enclave, and it's
35851 not mandatory that we use that enclave, stop wanting it.
35852 - When eventdns is enabled, allow multithreaded builds on NetBSD and
35853 OpenBSD. (We had previously disabled threads on these platforms
35854 because they didn't have working thread-safe resolver functions.)
35856 o Major bugfixes, anonymity/security:
35857 - If a client asked for a server by name, and there's a named server
35858 in our network-status but we don't have its descriptor yet, we
35859 could return an unnamed server instead.
35860 - Fix NetBSD bug that could allow someone to force uninitialized RAM
35861 to be sent to a server's DNS resolver. This only affects NetBSD
35862 and other platforms that do not bounds-check tolower().
35863 - Reject (most) attempts to use Tor circuits with length one. (If
35864 many people start using Tor as a one-hop proxy, exit nodes become
35865 a more attractive target for compromise.)
35866 - Just because your DirPort is open doesn't mean people should be
35867 able to remotely teach you about hidden service descriptors. Now
35868 only accept rendezvous posts if you've got HSAuthoritativeDir set.
35870 o Major bugfixes, other:
35871 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
35872 - When a client asks the server to resolve (not connect to)
35873 an address, and it has a cached answer, give them the cached answer.
35874 Previously, the server would give them no answer at all.
35875 - Allow really slow clients to not hang up five minutes into their
35876 directory downloads (suggested by Adam J. Richter).
35877 - We were building exactly the wrong circuits when we anticipated
35878 hidden service requirements, meaning Tor would have to build all
35879 its circuits on demand.
35880 - Avoid crashing when we mmap a router cache file of size 0.
35881 - When testing reachability of our DirPort, don't launch new
35882 tests when there's already one in progress -- unreachable
35883 servers were stacking up dozens of testing streams.
35885 o Minor bugfixes, correctness:
35886 - If we're a directory mirror and we ask for "all" network status
35887 documents, we would discard status documents from authorities
35888 we don't recognize.
35889 - Avoid a memory corruption bug when creating a hash table for
35891 - Avoid controller-triggered crash when misusing certain commands
35892 from a v0 controller on platforms that do not handle
35893 printf("%s",NULL) gracefully.
35894 - Don't crash when a controller sends a third argument to an
35895 "extendcircuit" request.
35896 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35897 response; fix error code when "getinfo dir/status/" fails.
35898 - Avoid crash when telling controller stream-status and a stream
35900 - Patch from Adam Langley to fix assert() in eventdns.c.
35901 - Fix a debug log message in eventdns to say "X resolved to Y"
35902 instead of "X resolved to X".
35903 - Make eventdns give strings for DNS errors, not just error numbers.
35904 - Track unreachable entry guards correctly: don't conflate
35905 'unreachable by us right now' with 'listed as down by the directory
35906 authorities'. With the old code, if a guard was unreachable by
35907 us but listed as running, it would clog our guard list forever.
35908 - Behave correctly in case we ever have a network with more than
35909 2GB/s total advertised capacity.
35910 - Make TrackExitHosts case-insensitive, and fix the behavior of
35911 ".suffix" TrackExitHosts items to avoid matching in the middle of
35913 - Finally fix the openssl warnings from newer gccs that believe that
35914 ignoring a return value is okay, but casting a return value and
35915 then ignoring it is a sign of madness.
35916 - Prevent the contrib/exitlist script from printing the same
35917 result more than once.
35918 - Patch from Steve Hildrey: Generate network status correctly on
35919 non-versioning dirservers.
35920 - Don't listen to the X-Your-Address-Is hint if you did the lookup
35921 via Tor; otherwise you'll think you're the exit node's IP address.
35923 o Minor bugfixes, performance:
35924 - Two small performance improvements on parsing descriptors.
35925 - Major performance improvement on inserting descriptors: change
35926 algorithm from O(n^2) to O(n).
35927 - Make the common memory allocation path faster on machines where
35928 malloc(0) returns a pointer.
35929 - Start remembering X-Your-Address-Is directory hints even if you're
35930 a client, so you can become a server more smoothly.
35931 - Avoid duplicate entries on MyFamily line in server descriptor.
35933 o Packaging, features:
35934 - Remove architecture from OS X builds. The official builds are
35935 now universal binaries.
35936 - The Debian package now uses --verify-config when (re)starting,
35937 to distinguish configuration errors from other errors.
35938 - Update RPMs to require libevent 1.1b.
35940 o Packaging, bugfixes:
35941 - Patches so Tor builds with MinGW on Windows.
35942 - Patches so Tor might run on Cygwin again.
35943 - Resume building on non-gcc compilers and ancient gcc. Resume
35944 building with the -O0 compile flag. Resume building cleanly on
35946 - Run correctly on OS X platforms with case-sensitive filesystems.
35947 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
35948 - Add autoconf checks so Tor can build on Solaris x86 again.
35951 - Documented (and renamed) ServerDNSSearchDomains and
35952 ServerDNSResolvConfFile options.
35953 - Be clearer that the *ListenAddress directives can be repeated
35957 Changes in version 0.1.1.24 - 2006-09-29
35959 - Allow really slow clients to not hang up five minutes into their
35960 directory downloads (suggested by Adam J. Richter).
35961 - Fix major performance regression from 0.1.0.x: instead of checking
35962 whether we have enough directory information every time we want to
35963 do something, only check when the directory information has changed.
35964 This should improve client CPU usage by 25-50%.
35965 - Don't crash if, after a server has been running for a while,
35966 it can't resolve its hostname.
35969 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35970 - Don't crash when the controller receives a third argument to an
35971 "extendcircuit" request.
35972 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35973 response; fix error code when "getinfo dir/status/" fails.
35974 - Fix configure.in to not produce broken configure files with
35975 more recent versions of autoconf. Thanks to Clint for his auto*
35977 - Fix security bug on NetBSD that could allow someone to force
35978 uninitialized RAM to be sent to a server's DNS resolver. This
35979 only affects NetBSD and other platforms that do not bounds-check
35981 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
35982 methods: these are known to be buggy.
35983 - If we're a directory mirror and we ask for "all" network status
35984 documents, we would discard status documents from authorities
35985 we don't recognize.
35988 Changes in version 0.1.2.1-alpha - 2006-08-27
35990 - Add "eventdns" async dns library from Adam Langley, tweaked to
35991 build on OSX and Windows. Only enabled if you pass the
35992 --enable-eventdns argument to configure.
35993 - Allow servers with no hostname or IP address to learn their
35994 IP address by asking the directory authorities. This code only
35995 kicks in when you would normally have exited with a "no address"
35996 error. Nothing's authenticated, so use with care.
35997 - Rather than waiting a fixed amount of time between retrying
35998 application connections, we wait only 5 seconds for the first,
35999 10 seconds for the second, and 15 seconds for each retry after
36000 that. Hopefully this will improve the expected user experience.
36001 - Patch from Tup to add support for transparent AP connections:
36002 this basically bundles the functionality of trans-proxy-tor
36003 into the Tor mainline. Now hosts with compliant pf/netfilter
36004 implementations can redirect TCP connections straight to Tor
36005 without diverting through SOCKS. Needs docs.
36006 - Busy directory servers save lots of memory by spooling server
36007 descriptors, v1 directories, and v2 networkstatus docs to buffers
36008 as needed rather than en masse. Also mmap the cached-routers
36009 files, so we don't need to keep the whole thing in memory too.
36010 - Automatically avoid picking more than one node from the same
36011 /16 network when constructing a circuit.
36012 - Revise and clean up the torrc.sample that we ship with; add
36013 a section for BandwidthRate and BandwidthBurst.
36016 - Split circuit_t into origin_circuit_t and or_circuit_t, and
36017 split connection_t into edge, or, dir, control, and base structs.
36018 These will save quite a bit of memory on busy servers, and they'll
36019 also help us track down bugs in the code and bugs in the spec.
36020 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
36021 or later. Log when we are doing this, so we can diagnose it when
36022 it fails. (Also, recommend libevent 1.1b for kqueue and
36023 win32 methods; deprecate libevent 1.0b harder; make libevent
36024 recommendation system saner.)
36025 - Start being able to build universal binaries on OS X (thanks
36027 - Export the default exit policy via the control port, so controllers
36028 don't need to guess what it is / will be later.
36029 - Add a man page entry for ProtocolWarnings.
36030 - Add TestVia config option to the man page.
36031 - Remove even more protocol-related warnings from Tor server logs,
36032 such as bad TLS handshakes and malformed begin cells.
36033 - Stop fetching descriptors if you're not a dir mirror and you
36034 haven't tried to establish any circuits lately. [This currently
36035 causes some dangerous behavior, because when you start up again
36036 you'll use your ancient server descriptors.]
36037 - New DirPort behavior: if you have your dirport set, you download
36038 descriptors aggressively like a directory mirror, whether or not
36039 your ORPort is set.
36040 - Get rid of the router_retry_connections notion. Now routers
36041 no longer try to rebuild long-term connections to directory
36042 authorities, and directory authorities no longer try to rebuild
36043 long-term connections to all servers. We still don't hang up
36044 connections in these two cases though -- we need to look at it
36045 more carefully to avoid flapping, and we likely need to wait til
36046 0.1.1.x is obsolete.
36047 - Drop compatibility with obsolete Tors that permit create cells
36048 to have the wrong circ_id_type.
36049 - Re-enable per-connection rate limiting. Get rid of the "OP
36050 bandwidth" concept. Lay groundwork for "bandwidth classes" --
36051 separate global buckets that apply depending on what sort of conn
36053 - Start publishing one minute or so after we find our ORPort
36054 to be reachable. This will help reduce the number of descriptors
36055 we have for ourselves floating around, since it's quite likely
36056 other things (e.g. DirPort) will change during that minute too.
36057 - Fork the v1 directory protocol into its own spec document,
36058 and mark dir-spec.txt as the currently correct (v2) spec.
36061 - When we find our DirPort to be reachable, publish a new descriptor
36062 so we'll tell the world (reported by pnx).
36063 - Publish a new descriptor after we hup/reload. This is important
36064 if our config has changed such that we'll want to start advertising
36065 our DirPort now, etc.
36066 - Allow Tor to start when RunAsDaemon is set but no logs are set.
36067 - When we have a state file we cannot parse, tell the user and
36068 move it aside. Now we avoid situations where the user starts
36069 Tor in 1904, Tor writes a state file with that timestamp in it,
36070 the user fixes her clock, and Tor refuses to start.
36071 - Fix configure.in to not produce broken configure files with
36072 more recent versions of autoconf. Thanks to Clint for his auto*
36074 - "tor --verify-config" now exits with -1(255) or 0 depending on
36075 whether the config options are bad or good.
36076 - Resolve bug 321 when using dnsworkers: append a period to every
36077 address we resolve at the exit node, so that we do not accidentally
36078 pick up local addresses, and so that failing searches are retried
36079 in the resolver search domains. (This is already solved for
36080 eventdns.) (This breaks Blossom servers for now.)
36081 - If we are using an exit enclave and we can't connect, e.g. because
36082 its webserver is misconfigured to not listen on localhost, then
36083 back off and try connecting from somewhere else before we fail.
36086 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
36087 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
36088 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
36089 when the IP address is mapped through MapAddress to a hostname.
36090 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
36091 useless IPv6 DNS resolves.
36092 - Patch suggested by Karsten Loesing: respond to SIGNAL command
36093 before we execute the signal, in case the signal shuts us down.
36094 - Clean up AllowInvalidNodes man page entry.
36095 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
36096 - Add more asserts to track down an assert error on a windows Tor
36097 server with connection_add being called with socket == -1.
36098 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
36099 - Fix misleading log messages: an entry guard that is "unlisted",
36100 as well as not known to be "down" (because we've never heard
36101 of it), is not therefore "up".
36102 - Remove code to special-case "-cvs" ending, since it has not
36103 actually mattered since 0.0.9.
36104 - Make our socks5 handling more robust to broken socks clients:
36105 throw out everything waiting on the buffer in between socks
36106 handshake phases, since they can't possibly (so the theory
36107 goes) have predicted what we plan to respond to them.
36110 Changes in version 0.1.1.23 - 2006-07-30
36112 - Fast Tor servers, especially exit nodes, were triggering asserts
36113 due to a bug in handling the list of pending DNS resolves. Some
36114 bugs still remain here; we're hunting them.
36115 - Entry guards could crash clients by sending unexpected input.
36116 - More fixes on reachability testing: if you find yourself reachable,
36117 then don't ever make any client requests (so you stop predicting
36118 circuits), then hup or have your clock jump, then later your IP
36119 changes, you won't think circuits are working, so you won't try to
36120 test reachability, so you won't publish.
36123 - Avoid a crash if the controller does a resetconf firewallports
36124 and then a setconf fascistfirewall=1.
36125 - Avoid an integer underflow when the dir authority decides whether
36126 a router is stable: we might wrongly label it stable, and compute
36127 a slightly wrong median stability, when a descriptor is published
36129 - Fix a place where we might trigger an assert if we can't build our
36130 own server descriptor yet.
36133 Changes in version 0.1.1.22 - 2006-07-05
36135 - Fix a big bug that was causing servers to not find themselves
36136 reachable if they changed IP addresses. Since only 0.1.1.22+
36137 servers can do reachability testing correctly, now we automatically
36138 make sure to test via one of these.
36139 - Fix to allow clients and mirrors to learn directory info from
36140 descriptor downloads that get cut off partway through.
36141 - Directory authorities had a bug in deciding if a newly published
36142 descriptor was novel enough to make everybody want a copy -- a few
36143 servers seem to be publishing new descriptors many times a minute.
36145 - Fix a rare bug that was causing some servers to complain about
36146 "closing wedged cpuworkers" and skip some circuit create requests.
36147 - Make the Exit flag in directory status documents actually work.
36150 Changes in version 0.1.1.21 - 2006-06-10
36151 o Crash and assert fixes from 0.1.1.20:
36152 - Fix a rare crash on Tor servers that have enabled hibernation.
36153 - Fix a seg fault on startup for Tor networks that use only one
36154 directory authority.
36155 - Fix an assert from a race condition that occurs on Tor servers
36156 while exiting, where various threads are trying to log that they're
36157 exiting, and delete the logs, at the same time.
36158 - Make our unit tests pass again on certain obscure platforms.
36161 - Add support for building SUSE RPM packages.
36162 - Speed up initial bootstrapping for clients: if we are making our
36163 first ever connection to any entry guard, then don't mark it down
36165 - When only one Tor server in the network is labelled as a guard,
36166 and we've already picked him, we would cycle endlessly picking him
36167 again, being unhappy about it, etc. Now we specifically exclude
36168 current guards when picking a new guard.
36169 - Servers send create cells more reliably after the TLS connection
36170 is established: we were sometimes forgetting to send half of them
36171 when we had more than one pending.
36172 - If we get a create cell that asks us to extend somewhere, but the
36173 Tor server there doesn't match the expected digest, we now send
36174 a destroy cell back, rather than silently doing nothing.
36175 - Make options->RedirectExit work again.
36176 - Make cookie authentication for the controller work again.
36177 - Stop being picky about unusual characters in the arguments to
36178 mapaddress. It's none of our business.
36179 - Add a new config option "TestVia" that lets you specify preferred
36180 middle hops to use for test circuits. Perhaps this will let me
36181 debug the reachability problems better.
36183 o Log / documentation fixes:
36184 - If we're a server and some peer has a broken TLS certificate, don't
36185 log about it unless ProtocolWarnings is set, i.e., we want to hear
36186 about protocol violations by others.
36187 - Fix spelling of VirtualAddrNetwork in man page.
36188 - Add a better explanation at the top of the autogenerated torrc file
36189 about what happened to our old torrc.
36192 Changes in version 0.1.1.20 - 2006-05-23
36194 - Downgrade a log severity where servers complain that they're
36196 - Avoid a compile warning on FreeBSD.
36197 - Remove string size limit on NEWDESC messages; solve bug 291.
36198 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
36199 more thoroughly when we're running on windows.
36202 Changes in version 0.1.1.19-rc - 2006-05-03
36204 - Regenerate our local descriptor if it's dirty and we try to use
36205 it locally (e.g. if it changes during reachability detection).
36206 - If we setconf our ORPort to 0, we continued to listen on the
36207 old ORPort and receive connections.
36208 - Avoid a second warning about machine/limits.h on Debian
36210 - Be willing to add our own routerinfo into the routerlist.
36211 Now authorities will include themselves in their directories
36212 and network-statuses.
36213 - Stop trying to upload rendezvous descriptors to every
36214 directory authority: only try the v1 authorities.
36215 - Servers no longer complain when they think they're not
36216 registered with the directory authorities. There were too many
36218 - Backport dist-rpm changes so rpms can be built without errors.
36221 - Implement an option, VirtualAddrMask, to set which addresses
36222 get handed out in response to mapaddress requests. This works
36223 around a bug in tsocks where 127.0.0.0/8 is never socksified.
36226 Changes in version 0.1.1.18-rc - 2006-04-10
36228 - Work harder to download live network-statuses from all the
36229 directory authorities we know about. Improve the threshold
36230 decision logic so we're more robust to edge cases.
36231 - When fetching rendezvous descriptors, we were willing to ask
36232 v2 authorities too, which would always return 404.
36235 - Stop listing down or invalid nodes in the v1 directory. This will
36236 reduce its bulk by about 1/3, and reduce load on directory
36238 - When deciding whether a router is Fast or Guard-worthy, consider
36239 his advertised BandwidthRate and not just the BandwidthCapacity.
36240 - No longer ship INSTALL and README files -- they are useless now.
36241 - Force rpmbuild to behave and honor target_cpu.
36242 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36243 - Start to include translated versions of the tor-doc-*.html
36244 files, along with the screenshots. Still needs more work.
36245 - Start sending back 512 and 451 errors if mapaddress fails,
36246 rather than not sending anything back at all.
36247 - When we fail to bind or listen on an incoming or outgoing
36248 socket, we should close it before failing. otherwise we just
36249 leak it. (thanks to weasel for finding.)
36250 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36251 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36252 - Make NoPublish (even though deprecated) work again.
36253 - Fix a minor security flaw where a versioning auth dirserver
36254 could list a recommended version many times in a row to make
36255 clients more convinced that it's recommended.
36256 - Fix crash bug if there are two unregistered servers running
36257 with the same nickname, one of them is down, and you ask for
36258 them by nickname in your EntryNodes or ExitNodes. Also, try
36259 to pick the one that's running rather than an arbitrary one.
36260 - Fix an infinite loop we could hit if we go offline for too long.
36261 - Complain when we hit WSAENOBUFS on recv() or write() too.
36262 Perhaps this will help us hunt the bug.
36263 - If you're not a versioning dirserver, don't put the string
36264 "client-versions \nserver-versions \n" in your network-status.
36265 - Lower the minimum required number of file descriptors to 1000,
36266 so we can have some overhead for Valgrind on Linux, where the
36267 default ulimit -n is 1024.
36270 - Add tor.dizum.com as the fifth authoritative directory server.
36271 - Add a new config option FetchUselessDescriptors, off by default,
36272 for when you plan to run "exitlist" on your client and you want
36273 to know about even the non-running descriptors.
36276 Changes in version 0.1.1.17-rc - 2006-03-28
36278 - Clients and servers since 0.1.1.10-alpha have been expiring
36279 connections whenever they are idle for 5 minutes and they *do*
36280 have circuits on them. Oops. With this new version, clients will
36281 discard their previous entry guard choices and avoid choosing
36282 entry guards running these flawed versions.
36283 - Fix memory leak when uncompressing concatenated zlib streams. This
36284 was causing substantial leaks over time on Tor servers.
36285 - The v1 directory was including servers as much as 48 hours old,
36286 because that's how the new routerlist->routers works. Now only
36287 include them if they're 20 hours old or less.
36290 - Resume building on irix64, netbsd 2.0, etc.
36291 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36293 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36294 and it is confusing some users.
36295 - Mirrors stop caching the v1 directory so often.
36296 - Make the max number of old descriptors that a cache will hold
36297 rise with the number of directory authorities, so we can scale.
36298 - Change our win32 uname() hack to be more forgiving about what
36299 win32 versions it thinks it's found.
36302 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36304 - When the controller's *setconf commands fail, collect an error
36305 message in a string and hand it back to the controller.
36306 - Make the v2 dir's "Fast" flag based on relative capacity, just
36307 like "Stable" is based on median uptime. Name everything in the
36308 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36309 - Log server fingerprint on startup, so new server operators don't
36310 have to go hunting around their filesystem for it.
36311 - Return a robots.txt on our dirport to discourage google indexing.
36312 - Let the controller ask for GETINFO dir/status/foo so it can ask
36313 directly rather than connecting to the dir port. Only works when
36314 dirport is set for now.
36316 o New config options rather than constants in the code:
36317 - SocksTimeout: How long do we let a socks connection wait
36318 unattached before we fail it?
36319 - CircuitBuildTimeout: Cull non-open circuits that were born
36320 at least this many seconds ago.
36321 - CircuitIdleTimeout: Cull open clean circuits that were born
36322 at least this many seconds ago.
36325 Changes in version 0.1.1.16-rc - 2006-03-18
36326 o Bugfixes on 0.1.1.15-rc:
36327 - Fix assert when the controller asks to attachstream a connect-wait
36328 or resolve-wait stream.
36329 - Now do address rewriting when the controller asks us to attach
36330 to a particular circuit too. This will let Blossom specify
36331 "moria2.exit" without having to learn what moria2's IP address is.
36332 - Make the "tor --verify-config" command-line work again, so people
36333 can automatically check if their torrc will parse.
36334 - Authoritative dirservers no longer require an open connection from
36335 a server to consider him "reachable". We need this change because
36336 when we add new auth dirservers, old servers won't know not to
36338 - Let Tor build on Sun CC again.
36339 - Fix an off-by-one buffer size in dirserv.c that magically never
36340 hit our three authorities but broke sjmurdoch's own tor network.
36341 - If we as a directory mirror don't know of any v1 directory
36342 authorities, then don't try to cache any v1 directories.
36343 - Stop warning about unknown servers in our family when they are
36344 given as hex digests.
36345 - Stop complaining as quickly to the server operator that he
36346 hasn't registered his nickname/key binding.
36347 - Various cleanups so we can add new V2 Auth Dirservers.
36348 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36349 reflect the updated flags in our v2 dir protocol.
36350 - Resume allowing non-printable characters for exit streams (both
36351 for connecting and for resolving). Now we tolerate applications
36352 that don't follow the RFCs. But continue to block malformed names
36355 o Bugfixes on 0.1.0.x:
36356 - Fix assert bug in close_logs(): when we close and delete logs,
36357 remove them all from the global "logfiles" list.
36358 - Fix minor integer overflow in calculating when we expect to use up
36359 our bandwidth allocation before hibernating.
36360 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36361 there are multiple SSLs installed with different versions.
36362 - When we try to be a server and Address is not explicitly set and
36363 our hostname resolves to a private IP address, try to use an
36364 interface address if it has a public address. Now Windows machines
36365 that think of themselves as localhost can work by default.
36368 - Let the controller ask for GETINFO dir/server/foo so it can ask
36369 directly rather than connecting to the dir port.
36370 - Let the controller tell us about certain router descriptors
36371 that it doesn't want Tor to use in circuits. Implement
36372 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36373 - New config option SafeSocks to reject all application connections
36374 using unsafe socks protocols. Defaults to off.
36377 Changes in version 0.1.1.15-rc - 2006-03-11
36378 o Bugfixes and cleanups:
36379 - When we're printing strings from the network, don't try to print
36380 non-printable characters. This protects us against shell escape
36381 sequence exploits, and also against attacks to fool humans into
36382 misreading their logs.
36383 - Fix a bug where Tor would fail to establish any connections if you
36384 left it off for 24 hours and then started it: we were happy with
36385 the obsolete network statuses, but they all referred to router
36386 descriptors that were too old to fetch, so we ended up with no
36387 valid router descriptors.
36388 - Fix a seg fault in the controller's "getinfo orconn-status"
36389 command while listing status on incoming handshaking connections.
36390 Introduce a status name "NEW" for these connections.
36391 - If we get a linelist or linelist_s config option from the torrc
36392 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36393 silently resetting it to its default.
36394 - Don't abandon entry guards until they've been down or gone for
36396 - Cleaner and quieter log messages.
36399 - New controller signal NEWNYM that makes new application requests
36400 use clean circuits.
36401 - Add a new circuit purpose 'controller' to let the controller ask
36402 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36403 controller command to let you specify the purpose if you're
36404 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36405 command to let you change a circuit's purpose after it's been
36407 - Accept "private:*" in routerdesc exit policies; not generated yet
36408 because older Tors do not understand it.
36409 - Add BSD-style contributed startup script "rc.subr" from Peter
36413 Changes in version 0.1.1.14-alpha - 2006-02-20
36414 o Bugfixes on 0.1.1.x:
36415 - Don't die if we ask for a stdout or stderr log (even implicitly)
36416 and we're set to RunAsDaemon -- just warn.
36417 - We still had a few bugs in the OR connection rotation code that
36418 caused directory servers to slowly aggregate connections to other
36419 fast Tor servers. This time for sure!
36420 - Make log entries on Win32 include the name of the function again.
36421 - We were treating a pair of exit policies if they were equal even
36422 if one said accept and the other said reject -- causing us to
36423 not always publish a new descriptor since we thought nothing
36425 - Retry pending server downloads as well as pending networkstatus
36426 downloads when we unexpectedly get a socks request.
36427 - We were ignoring the IS_FAST flag in the directory status,
36428 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36430 - If the controller's SAVECONF command fails (e.g. due to file
36431 permissions), let the controller know that it failed.
36434 - If we're trying to be a Tor server and running Windows 95/98/ME
36435 as a server, explain that we'll likely crash.
36436 - When we're a server, a client asks for an old-style directory,
36437 and our write bucket is empty, don't give it to him. This way
36438 small servers can continue to serve the directory *sometimes*,
36439 without getting overloaded.
36440 - Compress exit policies even more -- look for duplicate lines
36442 - Clients now honor the "guard" flag in the router status when
36443 picking entry guards, rather than looking at is_fast or is_stable.
36444 - Retain unrecognized lines in $DATADIR/state file, so that we can
36445 be forward-compatible.
36446 - Generate 18.0.0.0/8 address policy format in descs when we can;
36447 warn when the mask is not reducible to a bit-prefix.
36448 - Let the user set ControlListenAddress in the torrc. This can be
36449 dangerous, but there are some cases (like a secured LAN) where it
36451 - Split ReachableAddresses into ReachableDirAddresses and
36452 ReachableORAddresses, so we can restrict Dir conns to port 80
36453 and OR conns to port 443.
36454 - Now we can target arch and OS in rpm builds (contributed by
36455 Phobos). Also make the resulting dist-rpm filename match the
36457 - New config options to help controllers: FetchServerDescriptors
36458 and FetchHidServDescriptors for whether to fetch server
36459 info and hidserv info or let the controller do it, and
36460 PublishServerDescriptor and PublishHidServDescriptors.
36461 - Also let the controller set the __AllDirActionsPrivate config
36462 option if you want all directory fetches/publishes to happen via
36463 Tor (it assumes your controller bootstraps your circuits).
36466 Changes in version 0.1.0.17 - 2006-02-17
36467 o Crash bugfixes on 0.1.0.x:
36468 - When servers with a non-zero DirPort came out of hibernation,
36469 sometimes they would trigger an assert.
36471 o Other important bugfixes:
36472 - On platforms that don't have getrlimit (like Windows), we were
36473 artificially constraining ourselves to a max of 1024
36474 connections. Now just assume that we can handle as many as 15000
36475 connections. Hopefully this won't cause other problems.
36477 o Backported features:
36478 - When we're a server, a client asks for an old-style directory,
36479 and our write bucket is empty, don't give it to him. This way
36480 small servers can continue to serve the directory *sometimes*,
36481 without getting overloaded.
36482 - Whenever you get a 503 in response to a directory fetch, try
36483 once more. This will become important once servers start sending
36484 503's whenever they feel busy.
36485 - Fetch a new directory every 120 minutes, not every 40 minutes.
36486 Now that we have hundreds of thousands of users running the old
36487 directory algorithm, it's starting to hurt a lot.
36488 - Bump up the period for forcing a hidden service descriptor upload
36489 from 20 minutes to 1 hour.
36492 Changes in version 0.1.1.13-alpha - 2006-02-09
36493 o Crashes in 0.1.1.x:
36494 - When you tried to setconf ORPort via the controller, Tor would
36495 crash. So people using TorCP to become a server were sad.
36496 - Solve (I hope) the stack-smashing bug that we were seeing on fast
36497 servers. The problem appears to be something do with OpenSSL's
36498 random number generation, or how we call it, or something. Let me
36499 know if the crashes continue.
36500 - Turn crypto hardware acceleration off by default, until we find
36501 somebody smart who can test it for us. (It appears to produce
36502 seg faults in at least some cases.)
36503 - Fix a rare assert error when we've tried all intro points for
36504 a hidden service and we try fetching the service descriptor again:
36505 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
36508 - Fix a major load balance bug: we were round-robining in 16 KB
36509 chunks, and servers with bandwidthrate of 20 KB, while downloading
36510 a 600 KB directory, would starve their other connections. Now we
36511 try to be a bit more fair.
36512 - Dir authorities and mirrors were never expiring the newest
36513 descriptor for each server, causing memory and directory bloat.
36514 - Fix memory-bloating and connection-bloating bug on servers: We
36515 were never closing any connection that had ever had a circuit on
36516 it, because we were checking conn->n_circuits == 0, yet we had a
36517 bug that let it go negative.
36518 - Make Tor work using squid as your http proxy again -- squid
36519 returns an error if you ask for a URL that's too long, and it uses
36520 a really generic error message. Plus, many people are behind a
36521 transparent squid so they don't even realize it.
36522 - On platforms that don't have getrlimit (like Windows), we were
36523 artificially constraining ourselves to a max of 1024
36524 connections. Now just assume that we can handle as many as 15000
36525 connections. Hopefully this won't cause other problems.
36526 - Add a new config option ExitPolicyRejectPrivate which defaults to
36527 1. This means all exit policies will begin with rejecting private
36528 addresses, unless the server operator explicitly turns it off.
36531 - Clients no longer download descriptors for non-running
36533 - Before we add new directory authorities, we should make it
36534 clear that only v1 authorities should receive/publish hidden
36535 service descriptors.
36538 - As soon as we've fetched some more directory info, immediately
36539 try to download more server descriptors. This way we don't have
36540 a 10 second pause during initial bootstrapping.
36541 - Remove even more loud log messages that the server operator can't
36543 - When we're running an obsolete or un-recommended version, make
36544 the log message more clear about what the problem is and what
36545 versions *are* still recommended.
36546 - Provide a more useful warn message when our onion queue gets full:
36547 the CPU is too slow or the exit policy is too liberal.
36548 - Don't warn when we receive a 503 from a dirserver/cache -- this
36549 will pave the way for them being able to refuse if they're busy.
36550 - When we fail to bind a listener, try to provide a more useful
36551 log message: e.g., "Is Tor already running?"
36552 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
36553 Goldberg can prove things about our handshake protocol more
36555 - MaxConn has been obsolete for a while now. Document the ConnLimit
36556 config option, which is a *minimum* number of file descriptors
36557 that must be available else Tor refuses to start.
36558 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
36559 if you log to syslog and want something other than LOG_DAEMON.
36560 - Make dirservers generate a separate "guard" flag to mean,
36561 "would make a good entry guard". Make clients parse it and vote
36562 on it. Not used by clients yet.
36563 - Implement --with-libevent-dir option to ./configure. Also, improve
36564 search techniques to find libevent, and use those for openssl too.
36565 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36566 - Only start testing reachability once we've established a
36567 circuit. This will make startup on dirservers less noisy.
36568 - Don't try to upload hidden service descriptors until we have
36569 established a circuit.
36570 - Fix the controller's "attachstream 0" command to treat conn like
36571 it just connected, doing address remapping, handling .exit and
36572 .onion idioms, and so on. Now we're more uniform in making sure
36573 that the controller hears about new and closing connections.
36576 Changes in version 0.1.1.12-alpha - 2006-01-11
36577 o Bugfixes on 0.1.1.x:
36578 - The fix to close duplicate server connections was closing all
36579 Tor client connections if they didn't establish a circuit
36580 quickly enough. Oops.
36581 - Fix minor memory issue (double-free) that happened on exit.
36583 o Bugfixes on 0.1.0.x:
36584 - Tor didn't warn when it failed to open a log file.
36587 Changes in version 0.1.1.11-alpha - 2006-01-10
36588 o Crashes in 0.1.1.x:
36589 - Include all the assert/crash fixes from 0.1.0.16.
36590 - If you start Tor and then quit very quickly, there were some
36591 races that tried to free things that weren't allocated yet.
36592 - Fix a rare memory stomp if you're running hidden services.
36593 - Fix segfault when specifying DirServer in config without nickname.
36594 - Fix a seg fault when you finish connecting to a server but at
36595 that moment you dump his server descriptor.
36596 - Extendcircuit and Attachstream controller commands would
36597 assert/crash if you don't give them enough arguments.
36598 - Fix an assert error when we're out of space in the connection_list
36599 and we try to post a hidden service descriptor (reported by weasel).
36600 - If you specify a relative torrc path and you set RunAsDaemon in
36601 your torrc, then it chdir()'s to the new directory. If you HUP,
36602 it tries to load the new torrc location, fails, and exits.
36603 The fix: no longer allow a relative path to torrc using -f.
36606 - Implement "entry guards": automatically choose a handful of entry
36607 nodes and stick with them for all circuits. Only pick new guards
36608 when the ones you have are unsuitable, and if the old guards
36609 become suitable again, switch back. This will increase security
36610 dramatically against certain end-point attacks. The EntryNodes
36611 config option now provides some hints about which entry guards you
36612 want to use most; and StrictEntryNodes means to only use those.
36613 - New directory logic: download by descriptor digest, not by
36614 fingerprint. Caches try to download all listed digests from
36615 authorities; clients try to download "best" digests from caches.
36616 This avoids partitioning and isolating attacks better.
36617 - Make the "stable" router flag in network-status be the median of
36618 the uptimes of running valid servers, and make clients pay
36619 attention to the network-status flags. Thus the cutoff adapts
36620 to the stability of the network as a whole, making IRC, IM, etc
36621 connections more reliable.
36624 - Tor servers with dynamic IP addresses were needing to wait 18
36625 hours before they could start doing reachability testing using
36626 the new IP address and ports. This is because they were using
36627 the internal descriptor to learn what to test, yet they were only
36628 rebuilding the descriptor once they decided they were reachable.
36629 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
36630 to download certain server descriptors, throw them away, and then
36631 fetch them again after 30 minutes. Now mirrors throw away these
36632 server descriptors so clients can't get them.
36633 - We were leaving duplicate connections to other ORs open for a week,
36634 rather than closing them once we detect a duplicate. This only
36635 really affected authdirservers, but it affected them a lot.
36636 - Spread the authdirservers' reachability testing over the entire
36637 testing interval, so we don't try to do 500 TLS's at once every
36641 - If the network is down, and we try to connect to a conn because
36642 we have a circuit in mind, and we timeout (30 seconds) because the
36643 network never answers, we were expiring the circuit, but we weren't
36644 obsoleting the connection or telling the entry_guards functions.
36645 - Some Tor servers process billions of cells per day. These statistics
36646 need to be uint64_t's.
36647 - Check for integer overflows in more places, when adding elements
36648 to smartlists. This could possibly prevent a buffer overflow
36649 on malicious huge inputs. I don't see any, but I haven't looked
36651 - ReachableAddresses kept growing new "reject *:*" lines on every
36653 - When you "setconf log" via the controller, it should remove all
36654 logs. We were automatically adding back in a "log notice stdout".
36655 - Newly bootstrapped Tor networks couldn't establish hidden service
36656 circuits until they had nodes with high uptime. Be more tolerant.
36657 - We were marking servers down when they could not answer every piece
36658 of the directory request we sent them. This was far too harsh.
36659 - Fix the torify (tsocks) config file to not use Tor for localhost
36661 - Directory authorities now go to the proper authority when asking for
36662 a networkstatus, even when they want a compressed one.
36663 - Fix a harmless bug that was causing Tor servers to log
36664 "Got an end because of misc error, but we're not an AP. Closing."
36665 - Authorities were treating their own descriptor changes as cosmetic,
36666 meaning the descriptor available in the network-status and the
36667 descriptor that clients downloaded were different.
36668 - The OS X installer was adding a symlink for tor_resolve but
36669 the binary was called tor-resolve (reported by Thomas Hardly).
36670 - Workaround a problem with some http proxies where they refuse GET
36671 requests that specify "Content-Length: 0" (reported by Adrian).
36672 - Fix wrong log message when you add a "HiddenServiceNodes" config
36673 line without any HiddenServiceDir line (reported by Chris Thomas).
36676 - Write the TorVersion into the state file so we have a prayer of
36677 keeping forward and backward compatibility.
36678 - Revive the FascistFirewall config option rather than eliminating it:
36679 now it's a synonym for ReachableAddresses *:80,*:443.
36680 - Clients choose directory servers from the network status lists,
36681 not from their internal list of router descriptors. Now they can
36682 go to caches directly rather than needing to go to authorities
36684 - Directory authorities ignore router descriptors that have only
36685 cosmetic differences: do this for 0.1.0.x servers now too.
36686 - Add a new flag to network-status indicating whether the server
36687 can answer v2 directory requests too.
36688 - Authdirs now stop whining so loudly about bad descriptors that
36689 they fetch from other dirservers. So when there's a log complaint,
36690 it's for sure from a freshly uploaded descriptor.
36691 - Reduce memory requirements in our structs by changing the order
36693 - There used to be two ways to specify your listening ports in a
36694 server descriptor: on the "router" line and with a separate "ports"
36695 line. Remove support for the "ports" line.
36696 - New config option "AuthDirRejectUnlisted" for auth dirservers as
36697 a panic button: if we get flooded with unusable servers we can
36698 revert to only listing servers in the approved-routers file.
36699 - Auth dir servers can now mark a fingerprint as "!reject" or
36700 "!invalid" in the approved-routers file (as its nickname), to
36701 refuse descriptors outright or include them but marked as invalid.
36702 - Servers store bandwidth history across restarts/crashes.
36703 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
36704 get a better idea of why their circuits failed. Not used yet.
36705 - Directory mirrors now cache up to 16 unrecognized network-status
36706 docs. Now we can add new authdirservers and they'll be cached too.
36707 - When picking a random directory, prefer non-authorities if any
36709 - New controller option "getinfo desc/all-recent" to fetch the
36710 latest server descriptor for every router that Tor knows about.
36713 Changes in version 0.1.0.16 - 2006-01-02
36714 o Crash bugfixes on 0.1.0.x:
36715 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36716 corrupting the heap, losing FDs, or crashing when we need to resize
36717 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36718 - It turns out sparc64 platforms crash on unaligned memory access
36719 too -- so detect and avoid this.
36720 - Handle truncated compressed data correctly (by detecting it and
36722 - Fix possible-but-unlikely free(NULL) in control.c.
36723 - When we were closing connections, there was a rare case that
36724 stomped on memory, triggering seg faults and asserts.
36725 - Avoid potential infinite recursion when building a descriptor. (We
36726 don't know that it ever happened, but better to fix it anyway.)
36727 - We were neglecting to unlink marked circuits from soon-to-close OR
36728 connections, which caused some rare scribbling on freed memory.
36729 - Fix a memory stomping race bug when closing the joining point of two
36730 rendezvous circuits.
36731 - Fix an assert in time parsing found by Steven Murdoch.
36733 o Other bugfixes on 0.1.0.x:
36734 - When we're doing reachability testing, provide more useful log
36735 messages so the operator knows what to expect.
36736 - Do not check whether DirPort is reachable when we are suppressing
36737 advertising it because of hibernation.
36738 - When building with -static or on Solaris, we sometimes needed -ldl.
36739 - When we're deciding whether a stream has enough circuits around
36740 that can handle it, count the freshly dirty ones and not the ones
36741 that are so dirty they won't be able to handle it.
36742 - When we're expiring old circuits, we had a logic error that caused
36743 us to close new rendezvous circuits rather than old ones.
36744 - Give a more helpful log message when you try to change ORPort via
36745 the controller: you should upgrade Tor if you want that to work.
36746 - We were failing to parse Tor versions that start with "Tor ".
36747 - Tolerate faulty streams better: when a stream fails for reason
36748 exitpolicy, stop assuming that the router is lying about his exit
36749 policy. When a stream fails for reason misc, allow it to retry just
36750 as if it was resolvefailed. When a stream has failed three times,
36751 reset its failure count so we can try again and get all three tries.
36754 Changes in version 0.1.1.10-alpha - 2005-12-11
36755 o Correctness bugfixes on 0.1.0.x:
36756 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36757 corrupting the heap, losing FDs, or crashing when we need to resize
36758 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36759 - Stop doing the complex voodoo overkill checking for insecure
36760 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
36761 - When we were closing connections, there was a rare case that
36762 stomped on memory, triggering seg faults and asserts.
36763 - We were neglecting to unlink marked circuits from soon-to-close OR
36764 connections, which caused some rare scribbling on freed memory.
36765 - When we're deciding whether a stream has enough circuits around
36766 that can handle it, count the freshly dirty ones and not the ones
36767 that are so dirty they won't be able to handle it.
36768 - Recover better from TCP connections to Tor servers that are
36769 broken but don't tell you (it happens!); and rotate TLS
36770 connections once a week.
36771 - When we're expiring old circuits, we had a logic error that caused
36772 us to close new rendezvous circuits rather than old ones.
36773 - Fix a scary-looking but apparently harmless bug where circuits
36774 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
36775 servers, and never switch to state CIRCUIT_STATE_OPEN.
36776 - When building with -static or on Solaris, we sometimes needed to
36778 - Give a useful message when people run Tor as the wrong user,
36779 rather than telling them to start chowning random directories.
36780 - We were failing to inform the controller about new .onion streams.
36782 o Security bugfixes on 0.1.0.x:
36783 - Refuse server descriptors if the fingerprint line doesn't match
36784 the included identity key. Tor doesn't care, but other apps (and
36785 humans) might actually be trusting the fingerprint line.
36786 - We used to kill the circuit when we receive a relay command we
36787 don't recognize. Now we just drop it.
36788 - Start obeying our firewall options more rigorously:
36789 . If we can't get to a dirserver directly, try going via Tor.
36790 . Don't ever try to connect (as a client) to a place our
36791 firewall options forbid.
36792 . If we specify a proxy and also firewall options, obey the
36793 firewall options even when we're using the proxy: some proxies
36794 can only proxy to certain destinations.
36795 - Fix a bug found by Lasse Overlier: when we were making internal
36796 circuits (intended to be cannibalized later for rendezvous and
36797 introduction circuits), we were picking them so that they had
36798 useful exit nodes. There was no need for this, and it actually
36799 aids some statistical attacks.
36800 - Start treating internal circuits and exit circuits separately.
36801 It's important to keep them separate because internal circuits
36802 have their last hops picked like middle hops, rather than like
36803 exit hops. So exiting on them will break the user's expectations.
36805 o Bugfixes on 0.1.1.x:
36806 - Take out the mis-feature where we tried to detect IP address
36807 flapping for people with DynDNS, and chose not to upload a new
36808 server descriptor sometimes.
36809 - Try to be compatible with OpenSSL 0.9.6 again.
36810 - Log fix: when the controller is logging about .onion addresses,
36811 sometimes it didn't include the ".onion" part of the address.
36812 - Don't try to modify options->DirServers internally -- if the
36813 user didn't specify any, just add the default ones directly to
36814 the trusted dirserver list. This fixes a bug where people running
36815 controllers would use SETCONF on some totally unrelated config
36816 option, and Tor would start yelling at them about changing their
36818 - Let the controller's redirectstream command specify a port, in
36819 case the controller wants to change that too.
36820 - When we requested a pile of server descriptors, we sometimes
36821 accidentally launched a duplicate request for the first one.
36822 - Bugfix for trackhostexits: write down the fingerprint of the
36823 chosen exit, not its nickname, because the chosen exit might not
36825 - When parsing foo.exit, if foo is unknown, and we are leaving
36826 circuits unattached, set the chosen_exit field and leave the
36827 address empty. This matters because controllers got confused
36829 - Directory authorities no longer try to download server
36830 descriptors that they know they will reject.
36832 o Features and updates:
36833 - Replace balanced trees with hash tables: this should make stuff
36834 significantly faster.
36835 - Resume using the AES counter-mode implementation that we ship,
36836 rather than OpenSSL's. Ours is significantly faster.
36837 - Many other CPU and memory improvements.
36838 - Add a new config option FastFirstHopPK (on by default) so clients
36839 do a trivial crypto handshake for their first hop, since TLS has
36840 already taken care of confidentiality and authentication.
36841 - Add a new config option TestSocks so people can see if their
36842 applications are using socks4, socks4a, socks5-with-ip, or
36843 socks5-with-hostname. This way they don't have to keep mucking
36844 with tcpdump and wondering if something got cached somewhere.
36845 - Warn when listening on a public address for socks. I suspect a
36846 lot of people are setting themselves up as open socks proxies,
36847 and they have no idea that jerks on the Internet are using them,
36848 since they simply proxy the traffic into the Tor network.
36849 - Add "private:*" as an alias in configuration for policies. Now
36850 you can simplify your exit policy rather than needing to list
36851 every single internal or nonroutable network space.
36852 - Add a new controller event type that allows controllers to get
36853 all server descriptors that were uploaded to a router in its role
36854 as authoritative dirserver.
36855 - Start shipping socks-extensions.txt, tor-doc-unix.html,
36856 tor-doc-server.html, and stylesheet.css in the tarball.
36857 - Stop shipping tor-doc.html in the tarball.
36860 Changes in version 0.1.1.9-alpha - 2005-11-15
36861 o Usability improvements:
36862 - Start calling it FooListenAddress rather than FooBindAddress,
36863 since few of our users know what it means to bind an address
36865 - Reduce clutter in server logs. We're going to try to make
36866 them actually usable now. New config option ProtocolWarnings that
36867 lets you hear about how _other Tors_ are breaking the protocol. Off
36869 - Divide log messages into logging domains. Once we put some sort
36870 of interface on this, it will let people looking at more verbose
36871 log levels specify the topics they want to hear more about.
36872 - Make directory servers return better http 404 error messages
36873 instead of a generic "Servers unavailable".
36874 - Check for even more Windows version flags when writing the platform
36875 string in server descriptors, and note any we don't recognize.
36876 - Clean up more of the OpenSSL memory when exiting, so we can detect
36877 memory leaks better.
36878 - Make directory authorities be non-versioning, non-naming by
36879 default. Now we can add new directory servers without requiring
36880 their operators to pay close attention.
36881 - When logging via syslog, include the pid whenever we provide
36882 a log entry. Suggested by Todd Fries.
36884 o Performance improvements:
36885 - Directory servers now silently throw away new descriptors that
36886 haven't changed much if the timestamps are similar. We do this to
36887 tolerate older Tor servers that upload a new descriptor every 15
36888 minutes. (It seemed like a good idea at the time.)
36889 - Inline bottleneck smartlist functions; use fast versions by default.
36890 - Add a "Map from digest to void*" abstraction digestmap_t so we
36891 can do less hex encoding/decoding. Use it in router_get_by_digest()
36892 to resolve a performance bottleneck.
36893 - Allow tor_gzip_uncompress to extract as much as possible from
36894 truncated compressed data. Try to extract as many
36895 descriptors as possible from truncated http responses (when
36896 DIR_PURPOSE_FETCH_ROUTERDESC).
36897 - Make circ->onionskin a pointer, not a static array. moria2 was using
36898 125000 circuit_t's after it had been up for a few weeks, which
36899 translates to 20+ megs of wasted space.
36900 - The private half of our EDH handshake keys are now chosen out
36901 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
36903 o Security improvements:
36904 - Start making directory caches retain old routerinfos, so soon
36905 clients can start asking by digest of descriptor rather than by
36906 fingerprint of server.
36907 - Add half our entropy from RAND_poll in OpenSSL. This knows how
36908 to use egd (if present), openbsd weirdness (if present), vms/os2
36909 weirdness (if we ever port there), and more in the future.
36911 o Bugfixes on 0.1.0.x:
36912 - Do round-robin writes of at most 16 kB per write. This might be
36913 more fair on loaded Tor servers, and it might resolve our Windows
36914 crash bug. It might also slow things down.
36915 - Our TLS handshakes were generating a single public/private
36916 keypair for the TLS context, rather than making a new one for
36917 each new connections. Oops. (But we were still rotating them
36918 periodically, so it's not so bad.)
36919 - When we were cannibalizing a circuit with a particular exit
36920 node in mind, we weren't checking to see if that exit node was
36921 already present earlier in the circuit. Oops.
36922 - When a Tor server's IP changes (e.g. from a dyndns address),
36923 upload a new descriptor so clients will learn too.
36924 - Really busy servers were keeping enough circuits open on stable
36925 connections that they were wrapping around the circuit_id
36926 space. (It's only two bytes.) This exposed a bug where we would
36927 feel free to reuse a circuit_id even if it still exists but has
36928 been marked for close. Try to fix this bug. Some bug remains.
36929 - If we would close a stream early (e.g. it asks for a .exit that
36930 we know would refuse it) but the LeaveStreamsUnattached config
36931 option is set by the controller, then don't close it.
36933 o Bugfixes on 0.1.1.8-alpha:
36934 - Fix a big pile of memory leaks, some of them serious.
36935 - Do not try to download a routerdesc if we would immediately reject
36937 - Resume inserting a newline between all router descriptors when
36938 generating (old style) signed directories, since our spec says
36940 - When providing content-type application/octet-stream for
36941 server descriptors using .z, we were leaving out the
36942 content-encoding header. Oops. (Everything tolerated this just
36943 fine, but that doesn't mean we need to be part of the problem.)
36944 - Fix a potential seg fault in getconf and getinfo using version 1
36945 of the controller protocol.
36946 - Avoid crash: do not check whether DirPort is reachable when we
36947 are suppressing it because of hibernation.
36948 - Make --hash-password not crash on exit.
36951 Changes in version 0.1.1.8-alpha - 2005-10-07
36952 o New features (major):
36953 - Clients don't download or use the directory anymore. Now they
36954 download and use network-statuses from the trusted dirservers,
36955 and fetch individual server descriptors as needed from mirrors.
36956 See dir-spec.txt for all the gory details.
36957 - Be more conservative about whether to advertise our DirPort.
36958 The main change is to not advertise if we're running at capacity
36959 and either a) we could hibernate or b) our capacity is low and
36960 we're using a default DirPort.
36961 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
36963 o New features (minor):
36964 - Try to be smart about when to retry network-status and
36965 server-descriptor fetches. Still needs some tuning.
36966 - Stop parsing, storing, or using running-routers output (but
36967 mirrors still cache and serve it).
36968 - Consider a threshold of versioning dirservers (dirservers who have
36969 an opinion about which Tor versions are still recommended) before
36970 deciding whether to warn the user that he's obsolete.
36971 - Dirservers can now reject/invalidate by key and IP, with the
36972 config options "AuthDirInvalid" and "AuthDirReject". This is
36973 useful since currently we automatically list servers as running
36974 and usable even if we know they're jerks.
36975 - Provide dire warnings to any users who set DirServer; move it out
36976 of torrc.sample and into torrc.complete.
36977 - Add MyFamily to torrc.sample in the server section.
36978 - Add nicknames to the DirServer line, so we can refer to them
36979 without requiring all our users to memorize their IP addresses.
36980 - When we get an EOF or a timeout on a directory connection, note
36981 how many bytes of serverdesc we are dropping. This will help
36982 us determine whether it is smart to parse incomplete serverdesc
36984 - Add a new function to "change pseudonyms" -- that is, to stop
36985 using any currently-dirty circuits for new streams, so we don't
36986 link new actions to old actions. Currently it's only called on
36987 HUP (or SIGNAL RELOAD).
36988 - On sighup, if UseHelperNodes changed to 1, use new circuits.
36989 - Start using RAND_bytes rather than RAND_pseudo_bytes from
36990 OpenSSL. Also, reseed our entropy every hour, not just at
36991 startup. And entropy in 512-bit chunks, not 160-bit chunks.
36993 o Fixes on 0.1.1.7-alpha:
36994 - Nobody ever implemented EVENT_ADDRMAP for control protocol
36995 version 0, so don't let version 0 controllers ask for it.
36996 - If you requested something with too many newlines via the
36997 v1 controller protocol, you could crash tor.
36998 - Fix a number of memory leaks, including some pretty serious ones.
36999 - Re-enable DirPort testing again, so Tor servers will be willing
37000 to advertise their DirPort if it's reachable.
37001 - On TLS handshake, only check the other router's nickname against
37002 its expected nickname if is_named is set.
37004 o Fixes forward-ported from 0.1.0.15:
37005 - Don't crash when we don't have any spare file descriptors and we
37006 try to spawn a dns or cpu worker.
37007 - Make the numbers in read-history and write-history into uint64s,
37008 so they don't overflow and publish negatives in the descriptor.
37010 o Fixes on 0.1.0.x:
37011 - For the OS X package's modified privoxy config file, comment
37012 out the "logfile" line so we don't log everything passed
37014 - We were whining about using socks4 or socks5-with-local-lookup
37015 even when it's an IP in the "virtual" range we designed exactly
37017 - We were leaking some memory every time the client changes IPs.
37018 - Never call free() on tor_malloc()d memory. This will help us
37019 use dmalloc to detect memory leaks.
37020 - Check for named servers when looking them up by nickname;
37021 warn when we'recalling a non-named server by its nickname;
37022 don't warn twice about the same name.
37023 - Try to list MyFamily elements by key, not by nickname, and warn
37024 if we've not heard of the server.
37025 - Make windows platform detection (uname equivalent) smarter.
37026 - It turns out sparc64 doesn't like unaligned access either.
37029 Changes in version 0.1.0.15 - 2005-09-23
37030 o Bugfixes on 0.1.0.x:
37031 - Reject ports 465 and 587 (spam targets) in default exit policy.
37032 - Don't crash when we don't have any spare file descriptors and we
37033 try to spawn a dns or cpu worker.
37034 - Get rid of IgnoreVersion undocumented config option, and make us
37035 only warn, never exit, when we're running an obsolete version.
37036 - Don't try to print a null string when your server finds itself to
37037 be unreachable and the Address config option is empty.
37038 - Make the numbers in read-history and write-history into uint64s,
37039 so they don't overflow and publish negatives in the descriptor.
37040 - Fix a minor memory leak in smartlist_string_remove().
37041 - We were only allowing ourselves to upload a server descriptor at
37042 most every 20 minutes, even if it changed earlier than that.
37043 - Clean up log entries that pointed to old URLs.
37046 Changes in version 0.1.1.7-alpha - 2005-09-14
37047 o Fixes on 0.1.1.6-alpha:
37048 - Exit servers were crashing when people asked them to make a
37049 connection to an address not in their exit policy.
37050 - Looking up a non-existent stream for a v1 control connection would
37052 - Fix a seg fault if we ask a dirserver for a descriptor by
37053 fingerprint but he doesn't know about him.
37054 - SETCONF was appending items to linelists, not clearing them.
37055 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
37056 out and refuse the setconf if it would fail.
37057 - Downgrade the dirserver log messages when whining about
37061 - Add Peter Palfrader's check-tor script to tor/contrib/
37062 It lets you easily check whether a given server (referenced by
37063 nickname) is reachable by you.
37064 - Numerous changes to move towards client-side v2 directories. Not
37067 o Fixes on 0.1.0.x:
37068 - If the user gave tor an odd number of command-line arguments,
37069 we were silently ignoring the last one. Now we complain and fail.
37070 [This wins the oldest-bug prize -- this bug has been present since
37071 November 2002, as released in Tor 0.0.0.]
37072 - Do not use unaligned memory access on alpha, mips, or mipsel.
37073 It *works*, but is very slow, so we treat them as if it doesn't.
37074 - Retry directory requests if we fail to get an answer we like
37075 from a given dirserver (we were retrying before, but only if
37076 we fail to connect).
37077 - When writing the RecommendedVersions line, sort them first.
37078 - When the client asked for a rendezvous port that the hidden
37079 service didn't want to provide, we were sending an IP address
37080 back along with the end cell. Fortunately, it was zero. But stop
37082 - Correct "your server is reachable" log entries to indicate that
37083 it was self-testing that told us so.
37086 Changes in version 0.1.1.6-alpha - 2005-09-09
37087 o Fixes on 0.1.1.5-alpha:
37088 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
37089 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
37090 - Fix bug with tor_memmem finding a match at the end of the string.
37091 - Make unit tests run without segfaulting.
37092 - Resolve some solaris x86 compile warnings.
37093 - Handle duplicate lines in approved-routers files without warning.
37094 - Fix bug where as soon as a server refused any requests due to his
37095 exit policy (e.g. when we ask for localhost and he tells us that's
37096 127.0.0.1 and he won't do it), we decided he wasn't obeying his
37097 exit policy using him for any exits.
37098 - Only do openssl hardware accelerator stuff if openssl version is
37101 o New controller features/fixes:
37102 - Add a "RESETCONF" command so you can set config options like
37103 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
37104 a config option in the torrc with no value, then it clears it
37105 entirely (rather than setting it to its default).
37106 - Add a "GETINFO config-file" to tell us where torrc is.
37107 - Avoid sending blank lines when GETINFO replies should be empty.
37108 - Add a QUIT command for the controller (for using it manually).
37109 - Fix a bug in SAVECONF that was adding default dirservers and
37110 other redundant entries to the torrc file.
37112 o Start on the new directory design:
37113 - Generate, publish, cache, serve new network-status format.
37114 - Publish individual descriptors (by fingerprint, by "all", and by
37116 - Publish client and server recommended versions separately.
37117 - Allow tor_gzip_uncompress() to handle multiple concatenated
37118 compressed strings. Serve compressed groups of router
37119 descriptors. The compression logic here could be more
37121 - Distinguish v1 authorities (all currently trusted directories)
37122 from v2 authorities (all trusted directories).
37123 - Change DirServers config line to note which dirs are v1 authorities.
37124 - Add configuration option "V1AuthoritativeDirectory 1" which
37125 moria1, moria2, and tor26 should set.
37126 - Remove option when getting directory cache to see whether they
37127 support running-routers; they all do now. Replace it with one
37128 to see whether caches support v2 stuff.
37131 - Dirservers now do their own external reachability testing of each
37132 Tor server, and only list them as running if they've been found to
37133 be reachable. We also send back warnings to the server's logs if
37134 it uploads a descriptor that we already believe is unreachable.
37135 - Implement exit enclaves: if we know an IP address for the
37136 destination, and there's a running Tor server at that address
37137 which allows exit to the destination, then extend the circuit to
37138 that exit first. This provides end-to-end encryption and end-to-end
37139 authentication. Also, if the user wants a .exit address or enclave,
37140 use 4 hops rather than 3, and cannibalize a general circ for it
37142 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
37143 controller. Also, rotate dns and cpu workers if the controller
37144 changes options that will affect them; and initialize the dns
37145 worker cache tree whether or not we start out as a server.
37146 - Only upload a new server descriptor when options change, 18
37147 hours have passed, uptime is reset, or bandwidth changes a lot.
37148 - Check [X-]Forwarded-For headers in HTTP requests when generating
37149 log messages. This lets people run dirservers (and caches) behind
37150 Apache but still know which IP addresses are causing warnings.
37152 o Config option changes:
37153 - Replace (Fascist)Firewall* config options with a new
37154 ReachableAddresses option that understands address policies.
37155 For example, "ReachableAddresses *:80,*:443"
37156 - Get rid of IgnoreVersion undocumented config option, and make us
37157 only warn, never exit, when we're running an obsolete version.
37158 - Make MonthlyAccountingStart config option truly obsolete now.
37160 o Fixes on 0.1.0.x:
37161 - Reject ports 465 and 587 in the default exit policy, since
37162 people have started using them for spam too.
37163 - It turns out we couldn't bootstrap a network since we added
37164 reachability detection in 0.1.0.1-rc. Good thing the Tor network
37165 has never gone down. Add an AssumeReachable config option to let
37166 servers and dirservers bootstrap. When we're trying to build a
37167 high-uptime or high-bandwidth circuit but there aren't enough
37168 suitable servers, try being less picky rather than simply failing.
37169 - Our logic to decide if the OR we connected to was the right guy
37170 was brittle and maybe open to a mitm for unverified routers.
37171 - We weren't cannibalizing circuits correctly for
37172 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
37173 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
37174 build those from scratch. This should make hidden services faster.
37175 - Predict required circuits better, with an eye toward making hidden
37176 services faster on the service end.
37177 - Retry streams if the exit node sends back a 'misc' failure. This
37178 should result in fewer random failures. Also, after failing
37179 from resolve failed or misc, reset the num failures, so we give
37180 it a fair shake next time we try.
37181 - Clean up the rendezvous warn log msgs, and downgrade some to info.
37182 - Reduce severity on logs about dns worker spawning and culling.
37183 - When we're shutting down and we do something like try to post a
37184 server descriptor or rendezvous descriptor, don't complain that
37185 we seem to be unreachable. Of course we are, we're shutting down.
37186 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
37187 We don't use them yet, but maybe one day our DNS resolver will be
37188 able to discover them.
37189 - Make ContactInfo mandatory for authoritative directory servers.
37190 - Require server descriptors to list IPv4 addresses -- hostnames
37191 are no longer allowed. This also fixes some potential security
37192 problems with people providing hostnames as their address and then
37193 preferentially resolving them to partition users.
37194 - Change log line for unreachability to explicitly suggest /etc/hosts
37195 as the culprit. Also make it clearer what IP address and ports we're
37196 testing for reachability.
37197 - Put quotes around user-supplied strings when logging so users are
37198 more likely to realize if they add bad characters (like quotes)
37200 - Let auth dir servers start without specifying an Address config
37202 - Make unit tests (and other invocations that aren't the real Tor)
37203 run without launching listeners, creating subdirectories, and so on.
37206 Changes in version 0.1.1.5-alpha - 2005-08-08
37207 o Bugfixes included in 0.1.0.14.
37209 o Bugfixes on 0.1.0.x:
37210 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
37211 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
37212 it would silently using ignore the 6668.
37215 Changes in version 0.1.0.14 - 2005-08-08
37216 o Bugfixes on 0.1.0.x:
37217 - Fix the other half of the bug with crypto handshakes
37219 - Fix an assert trigger if you send a 'signal term' via the
37220 controller when it's listening for 'event info' messages.
37223 Changes in version 0.1.1.4-alpha - 2005-08-04
37224 o Bugfixes included in 0.1.0.13.
37227 - Improve tor_gettimeofday() granularity on windows.
37228 - Make clients regenerate their keys when their IP address changes.
37229 - Implement some more GETINFO goodness: expose helper nodes, config
37230 options, getinfo keys.
37233 Changes in version 0.1.0.13 - 2005-08-04
37234 o Bugfixes on 0.1.0.x:
37235 - Fix a critical bug in the security of our crypto handshakes.
37236 - Fix a size_t underflow in smartlist_join_strings2() that made
37237 it do bad things when you hand it an empty smartlist.
37238 - Fix Windows installer to ship Tor license (thanks to Aphex for
37239 pointing out this oversight) and put a link to the doc directory
37241 - Explicitly set no-unaligned-access for sparc: it turns out the
37242 new gcc's let you compile broken code, but that doesn't make it
37246 Changes in version 0.1.1.3-alpha - 2005-07-23
37247 o Bugfixes on 0.1.1.2-alpha:
37248 - Fix a bug in handling the controller's "post descriptor"
37250 - Fix several bugs in handling the controller's "extend circuit"
37252 - Fix a bug in handling the controller's "stream status" event.
37253 - Fix an assert failure if we have a controller listening for
37254 circuit events and we go offline.
37255 - Re-allow hidden service descriptors to publish 0 intro points.
37256 - Fix a crash when generating your hidden service descriptor if
37257 you don't have enough intro points already.
37259 o New features on 0.1.1.2-alpha:
37260 - New controller function "getinfo accounting", to ask how
37261 many bytes we've used in this time period.
37262 - Experimental support for helper nodes: a lot of the risk from
37263 a small static adversary comes because users pick new random
37264 nodes every time they rebuild a circuit. Now users will try to
37265 stick to the same small set of entry nodes if they can. Not
37266 enabled by default yet.
37268 o Bugfixes on 0.1.0.12:
37269 - If you're an auth dir server, always publish your dirport,
37270 even if you haven't yet found yourself to be reachable.
37271 - Fix a size_t underflow in smartlist_join_strings2() that made
37272 it do bad things when you hand it an empty smartlist.
37275 Changes in version 0.1.0.12 - 2005-07-18
37276 o New directory servers:
37277 - tor26 has changed IP address.
37279 o Bugfixes on 0.1.0.x:
37280 - Fix a possible double-free in tor_gzip_uncompress().
37281 - When --disable-threads is set, do not search for or link against
37282 pthreads libraries.
37283 - Don't trigger an assert if an authoritative directory server
37284 claims its dirport is 0.
37285 - Fix bug with removing Tor as an NT service: some people were
37286 getting "The service did not return an error." Thanks to Matt
37290 Changes in version 0.1.1.2-alpha - 2005-07-15
37291 o New directory servers:
37292 - tor26 has changed IP address.
37294 o Bugfixes on 0.1.0.x, crashes/leaks:
37295 - Port the servers-not-obeying-their-exit-policies fix from
37297 - Fix an fd leak in start_daemon().
37298 - On Windows, you can't always reopen a port right after you've
37299 closed it. So change retry_listeners() to only close and re-open
37300 ports that have changed.
37301 - Fix a possible double-free in tor_gzip_uncompress().
37303 o Bugfixes on 0.1.0.x, usability:
37304 - When tor_socketpair() fails in Windows, give a reasonable
37305 Windows-style errno back.
37306 - Let people type "tor --install" as well as "tor -install" when
37308 want to make it an NT service.
37309 - NT service patch from Matt Edman to improve error messages.
37310 - When the controller asks for a config option with an abbreviated
37311 name, give the full name in our response.
37312 - Correct the man page entry on TrackHostExitsExpire.
37313 - Looks like we were never delivering deflated (i.e. compressed)
37314 running-routers lists, even when asked. Oops.
37315 - When --disable-threads is set, do not search for or link against
37316 pthreads libraries.
37318 o Bugfixes on 0.1.1.x:
37319 - Fix a seg fault with autodetecting which controller version is
37323 - New hidden service descriptor format: put a version in it, and
37324 let people specify introduction/rendezvous points that aren't
37325 in "the directory" (which is subjective anyway).
37326 - Allow the DEBUG controller event to work again. Mark certain log
37327 entries as "don't tell this to controllers", so we avoid cycles.
37330 Changes in version 0.1.0.11 - 2005-06-30
37331 o Bugfixes on 0.1.0.x:
37332 - Fix major security bug: servers were disregarding their
37333 exit policies if clients behaved unexpectedly.
37334 - Make OS X init script check for missing argument, so we don't
37335 confuse users who invoke it incorrectly.
37336 - Fix a seg fault in "tor --hash-password foo".
37337 - The MAPADDRESS control command was broken.
37340 Changes in version 0.1.1.1-alpha - 2005-06-29
37342 - Make OS X init script check for missing argument, so we don't
37343 confuse users who invoke it incorrectly.
37344 - Fix a seg fault in "tor --hash-password foo".
37345 - Fix a possible way to DoS dirservers.
37346 - When we complain that your exit policy implicitly allows local or
37347 private address spaces, name them explicitly so operators can
37349 - Make the log message less scary when all the dirservers are
37350 temporarily unreachable.
37351 - We were printing the number of idle dns workers incorrectly when
37355 - Revised controller protocol (version 1) that uses ascii rather
37356 than binary. Add supporting libraries in python and java so you
37357 can use the controller from your applications without caring how
37358 our protocol works.
37359 - Spiffy new support for crypto hardware accelerators. Can somebody
37363 Changes in version 0.0.9.10 - 2005-06-16
37364 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37365 - Refuse relay cells that claim to have a length larger than the
37366 maximum allowed. This prevents a potential attack that could read
37367 arbitrary memory (e.g. keys) from an exit server's process
37371 Changes in version 0.1.0.10 - 2005-06-14
37372 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37373 libevent before 1.1a.
37376 Changes in version 0.1.0.9-rc - 2005-06-09
37378 - Reset buf->highwater every time buf_shrink() is called, not just on
37379 a successful shrink. This was causing significant memory bloat.
37380 - Fix buffer overflow when checking hashed passwords.
37381 - Security fix: if seeding the RNG on Win32 fails, quit.
37382 - Allow seeding the RNG on Win32 even when you're not running as
37384 - Disable threading on Solaris too. Something is wonky with it,
37385 cpuworkers, and reentrant libs.
37386 - Reenable the part of the code that tries to flush as soon as an
37387 OR outbuf has a full TLS record available. Perhaps this will make
37388 OR outbufs not grow as huge except in rare cases, thus saving lots
37389 of CPU time plus memory.
37390 - Reject malformed .onion addresses rather then passing them on as
37391 normal web requests.
37392 - Adapt patch from Adam Langley: fix possible memory leak in
37393 tor_lookup_hostname().
37394 - Initialize libevent later in the startup process, so the logs are
37395 already established by the time we start logging libevent warns.
37396 - Use correct errno on win32 if libevent fails.
37397 - Check and warn about known-bad/slow libevent versions.
37398 - Pay more attention to the ClientOnly config option.
37399 - Have torctl.in/tor.sh.in check for location of su binary (needed
37401 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37402 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37403 HttpProxyAuthenticator
37404 - Stop warning about sigpipes in the logs. We're going to
37405 pretend that getting these occasionally is normal and fine.
37406 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37408 installer screens; and don't put stuff into StartupItems unless
37409 the user asks you to.
37410 - Require servers that use the default dirservers to have public IP
37411 addresses. We have too many servers that are configured with private
37412 IPs and their admins never notice the log entries complaining that
37413 their descriptors are being rejected.
37414 - Add OSX uninstall instructions. An actual uninstall script will
37418 Changes in version 0.1.0.8-rc - 2005-05-23
37420 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37421 panics. Disable kqueue on all OS X Tors.
37422 - Fix RPM: remove duplicate line accidentally added to the rpm
37424 - Disable threads on openbsd too, since its gethostaddr is not
37426 - Tolerate libevent 0.8 since it still works, even though it's
37428 - Enable building on Red Hat 9.0 again.
37429 - Allow the middle hop of the testing circuit to be running any
37430 version, now that most of them have the bugfix to let them connect
37431 to unknown servers. This will allow reachability testing to work
37432 even when 0.0.9.7-0.0.9.9 become obsolete.
37433 - Handle relay cells with rh.length too large. This prevents
37434 a potential attack that could read arbitrary memory (maybe even
37435 keys) from the exit server's process.
37436 - We screwed up the dirport reachability testing when we don't yet
37437 have a cached version of the directory. Hopefully now fixed.
37438 - Clean up router_load_single_router() (used by the controller),
37439 so it doesn't seg fault on error.
37440 - Fix a minor memory leak when somebody establishes an introduction
37441 point at your Tor server.
37442 - If a socks connection ends because read fails, don't warn that
37443 you're not sending a socks reply back.
37446 - Add HttpProxyAuthenticator config option too, that works like
37447 the HttpsProxyAuthenticator config option.
37448 - Encode hashed controller passwords in hex instead of base64,
37449 to make it easier to write controllers.
37452 Changes in version 0.1.0.7-rc - 2005-05-17
37454 - Fix a bug in the OS X package installer that prevented it from
37455 installing on Tiger.
37456 - Fix a script bug in the OS X package installer that made it
37457 complain during installation.
37458 - Find libevent even if it's hiding in /usr/local/ and your
37459 CFLAGS and LDFLAGS don't tell you to look there.
37460 - Be able to link with libevent as a shared library (the default
37461 after 1.0d), even if it's hiding in /usr/local/lib and even
37462 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
37463 assuming you're running gcc. Otherwise fail and give a useful
37465 - Fix a bug in the RPM packager: set home directory for _tor to
37466 something more reasonable when first installing.
37467 - Free a minor amount of memory that is still reachable on exit.
37470 Changes in version 0.1.0.6-rc - 2005-05-14
37472 - Implement --disable-threads configure option. Disable threads on
37473 netbsd by default, because it appears to have no reentrant resolver
37475 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
37476 release (1.1) detects and disables kqueue if it's broken.
37477 - Append default exit policy before checking for implicit internal
37478 addresses. Now we don't log a bunch of complaints on startup
37479 when using the default exit policy.
37480 - Some people were putting "Address " in their torrc, and they had
37481 a buggy resolver that resolved " " to 0.0.0.0. Oops.
37482 - If DataDir is ~/.tor, and that expands to /.tor, then default to
37483 LOCALSTATEDIR/tor instead.
37484 - Fix fragmented-message bug in TorControl.py.
37485 - Resolve a minor bug which would prevent unreachable dirports
37486 from getting suppressed in the published descriptor.
37487 - When the controller gave us a new descriptor, we weren't resolving
37488 it immediately, so Tor would think its address was 0.0.0.0 until
37489 we fetched a new directory.
37490 - Fix an uppercase/lowercase case error in suppressing a bogus
37491 libevent warning on some Linuxes.
37494 - Begin scrubbing sensitive strings from logs by default. Turn off
37495 the config option SafeLogging if you need to do debugging.
37496 - Switch to a new buffer management algorithm, which tries to avoid
37497 reallocing and copying quite as much. In first tests it looks like
37498 it uses *more* memory on average, but less cpu.
37499 - First cut at support for "create-fast" cells. Clients can use
37500 these when extending to their first hop, since the TLS already
37501 provides forward secrecy and authentication. Not enabled on
37503 - When dirservers refuse a router descriptor, we now log its
37504 contactinfo, platform, and the poster's IP address.
37505 - Call tor_free_all instead of connections_free_all after forking, to
37506 save memory on systems that need to fork.
37507 - Whine at you if you're a server and you don't set your contactinfo.
37508 - Implement --verify-config command-line option to check if your torrc
37509 is valid without actually launching Tor.
37510 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
37511 rather than just rejecting it.
37514 Changes in version 0.1.0.5-rc - 2005-04-27
37516 - Stop trying to print a null pointer if an OR conn fails because
37517 we didn't like its cert.
37519 - Switch our internal buffers implementation to use a ring buffer,
37520 to hopefully improve performance for fast servers a lot.
37521 - Add HttpsProxyAuthenticator support (basic auth only), based
37522 on patch from Adam Langley.
37523 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
37524 the fast servers that have been joining lately.
37525 - Give hidden service accesses extra time on the first attempt,
37526 since 60 seconds is often only barely enough. This might improve
37528 - Improve performance for dirservers: stop re-parsing the whole
37529 directory every time you regenerate it.
37530 - Add more debugging info to help us find the weird dns freebsd
37531 pthreads bug; cleaner debug messages to help track future issues.
37534 Changes in version 0.0.9.9 - 2005-04-23
37535 o Bugfixes on 0.0.9.x:
37536 - If unofficial Tor clients connect and send weird TLS certs, our
37537 Tor server triggers an assert. This release contains a minimal
37538 backport from the broader fix that we put into 0.1.0.4-rc.
37541 Changes in version 0.1.0.4-rc - 2005-04-23
37543 - If unofficial Tor clients connect and send weird TLS certs, our
37544 Tor server triggers an assert. Stop asserting, and start handling
37545 TLS errors better in other situations too.
37546 - When the controller asks us to tell it about all the debug-level
37547 logs, it turns out we were generating debug-level logs while
37548 telling it about them, which turns into a bad loop. Now keep
37549 track of whether you're sending a debug log to the controller,
37550 and don't log when you are.
37551 - Fix the "postdescriptor" feature of the controller interface: on
37552 non-complete success, only say "done" once.
37554 - Clients are now willing to load balance over up to 2mB, not 1mB,
37555 of advertised bandwidth capacity.
37556 - Add a NoPublish config option, so you can be a server (e.g. for
37557 testing running Tor servers in other Tor networks) without
37558 publishing your descriptor to the primary dirservers.
37561 Changes in version 0.1.0.3-rc - 2005-04-08
37562 o Improvements on 0.1.0.2-rc:
37563 - Client now retries when streams end early for 'hibernating' or
37564 'resource limit' reasons, rather than failing them.
37565 - More automated handling for dirserver operators:
37566 - Automatically approve nodes running 0.1.0.2-rc or later,
37567 now that the the reachability detection stuff is working.
37568 - Now we allow two unverified servers with the same nickname
37569 but different keys. But if a nickname is verified, only that
37570 nickname+key are allowed.
37571 - If you're an authdirserver connecting to an address:port,
37572 and it's not the OR you were expecting, forget about that
37573 descriptor. If he *was* the one you were expecting, then forget
37574 about all other descriptors for that address:port.
37575 - Allow servers to publish descriptors from 12 hours in the future.
37576 Corollary: only whine about clock skew from the dirserver if
37577 he's a trusted dirserver (since now even verified servers could
37578 have quite wrong clocks).
37579 - Adjust maximum skew and age for rendezvous descriptors: let skew
37580 be 48 hours rather than 90 minutes.
37581 - Efficiency improvements:
37582 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
37583 it much faster to look up a circuit for each relay cell.
37584 - Remove most calls to assert_all_pending_dns_resolves_ok(),
37585 since they're eating our cpu on exit nodes.
37586 - Stop wasting time doing a case insensitive comparison for every
37587 dns name every time we do any lookup. Canonicalize the names to
37588 lowercase and be done with it.
37589 - Start sending 'truncated' cells back rather than destroy cells,
37590 if the circuit closes in front of you. This means we won't have
37591 to abandon partially built circuits.
37592 - Only warn once per nickname from add_nickname_list_to_smartlist
37593 per failure, so an entrynode or exitnode choice that's down won't
37595 - Put a note in the torrc about abuse potential with the default
37597 - Revise control spec and implementation to allow all log messages to
37598 be sent to controller with their severities intact (suggested by
37599 Matt Edman). Update TorControl to handle new log event types.
37600 - Provide better explanation messages when controller's POSTDESCRIPTOR
37602 - Stop putting nodename in the Platform string in server descriptors.
37603 It doesn't actually help, and it is confusing/upsetting some people.
37605 o Bugfixes on 0.1.0.2-rc:
37606 - We were printing the host mask wrong in exit policies in server
37607 descriptors. This isn't a critical bug though, since we were still
37608 obeying the exit policy internally.
37609 - Fix Tor when compiled with libevent but without pthreads: move
37610 connection_unregister() from _connection_free() to
37612 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
37613 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
37614 when we look through the connection array, we'll find any of the
37615 cpu/dnsworkers. This is no good.
37617 o Bugfixes on 0.0.9.8:
37618 - Fix possible bug on threading platforms (e.g. win32) which was
37619 leaking a file descriptor whenever a cpuworker or dnsworker died.
37620 - When using preferred entry or exit nodes, ignore whether the
37621 circuit wants uptime or capacity. They asked for the nodes, they
37623 - chdir() to your datadirectory at the *end* of the daemonize process,
37624 not the beginning. This was a problem because the first time you
37625 run tor, if your datadir isn't there, and you have runasdaemon set
37626 to 1, it will try to chdir to it before it tries to create it. Oops.
37627 - Handle changed router status correctly when dirserver reloads
37628 fingerprint file. We used to be dropping all unverified descriptors
37629 right then. The bug was hidden because we would immediately
37630 fetch a directory from another dirserver, which would include the
37631 descriptors we just dropped.
37632 - When we're connecting to an OR and he's got a different nickname/key
37633 than we were expecting, only complain loudly if we're an OP or a
37634 dirserver. Complaining loudly to the OR admins just confuses them.
37635 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
37636 artificially capped at 500kB.
37639 Changes in version 0.0.9.8 - 2005-04-07
37640 o Bugfixes on 0.0.9.x:
37641 - We have a bug that I haven't found yet. Sometimes, very rarely,
37642 cpuworkers get stuck in the 'busy' state, even though the cpuworker
37643 thinks of itself as idle. This meant that no new circuits ever got
37644 established. Here's a workaround to kill any cpuworker that's been
37645 busy for more than 100 seconds.
37648 Changes in version 0.1.0.2-rc - 2005-04-01
37649 o Bugfixes on 0.1.0.1-rc:
37650 - Fixes on reachability detection:
37651 - Don't check for reachability while hibernating.
37652 - If ORPort is reachable but DirPort isn't, still publish the
37653 descriptor, but zero out DirPort until it's found reachable.
37654 - When building testing circs for ORPort testing, use only
37655 high-bandwidth nodes, so fewer circuits fail.
37656 - Complain about unreachable ORPort separately from unreachable
37657 DirPort, so the user knows what's going on.
37658 - Make sure we only conclude ORPort reachability if we didn't
37659 initiate the conn. Otherwise we could falsely conclude that
37660 we're reachable just because we connected to the guy earlier
37661 and he used that same pipe to extend to us.
37662 - Authdirservers shouldn't do ORPort reachability detection,
37663 since they're in clique mode, so it will be rare to find a
37664 server not already connected to them.
37665 - When building testing circuits, always pick middle hops running
37666 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
37667 bug. (This is a kludge; it will go away when 0.0.9.x becomes
37669 - When we decide we're reachable, actually publish our descriptor
37671 - Fix bug in redirectstream in the controller.
37672 - Fix the state descriptor strings so logs don't claim edge streams
37673 are in a different state than they actually are.
37674 - Use recent libevent features when possible (this only really affects
37675 win32 and osx right now, because the new libevent with these
37676 features hasn't been released yet). Add code to suppress spurious
37678 - Prevent possible segfault in connection_close_unattached_ap().
37679 - Fix newlines on torrc in win32.
37680 - Improve error msgs when tor-resolve fails.
37682 o Improvements on 0.0.9.x:
37683 - New experimental script tor/contrib/ExerciseServer.py (needs more
37684 work) that uses the controller interface to build circuits and
37685 fetch pages over them. This will help us bootstrap servers that
37686 have lots of capacity but haven't noticed it yet.
37687 - New experimental script tor/contrib/PathDemo.py (needs more work)
37688 that uses the controller interface to let you choose whole paths
37690 "<hostname>.<path,separated by dots>.<length of path>.path"
37691 - When we've connected to an OR and handshaked but didn't like
37692 the result, we were closing the conn without sending destroy
37693 cells back for pending circuits. Now send those destroys.
37696 Changes in version 0.0.9.7 - 2005-04-01
37697 o Bugfixes on 0.0.9.x:
37698 - Fix another race crash bug (thanks to Glenn Fink for reporting).
37699 - Compare identity to identity, not to nickname, when extending to
37700 a router not already in the directory. This was preventing us from
37701 extending to unknown routers. Oops.
37702 - Make sure to create OS X Tor user in <500 range, so we aren't
37703 creating actual system users.
37704 - Note where connection-that-hasn't-sent-end was marked, and fix
37705 a few really loud instances of this harmless bug (it's fixed more
37709 Changes in version 0.1.0.1-rc - 2005-03-28
37711 - Add reachability testing. Your Tor server will automatically try
37712 to see if its ORPort and DirPort are reachable from the outside,
37713 and it won't upload its descriptor until it decides they are.
37714 - Handle unavailable hidden services better. Handle slow or busy
37715 hidden services better.
37716 - Add support for CONNECTing through https proxies, with "HttpsProxy"
37718 - New exit policy: accept most low-numbered ports, rather than
37719 rejecting most low-numbered ports.
37720 - More Tor controller support (still experimental). See
37721 http://tor.eff.org/doc/control-spec.txt for all the new features,
37722 including signals to emulate unix signals from any platform;
37723 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
37724 closestream; closecircuit; etc.
37725 - Make nt services work and start on startup on win32 (based on
37726 patch by Matt Edman).
37727 - Add a new AddressMap config directive to rewrite incoming socks
37728 addresses. This lets you, for example, declare an implicit
37729 required exit node for certain sites.
37730 - Add a new TrackHostExits config directive to trigger addressmaps
37731 for certain incoming socks addresses -- for sites that break when
37732 your exit keeps changing (based on patch by Mike Perry).
37733 - Redo the client-side dns cache so it's just an addressmap too.
37734 - Notice when our IP changes, and reset stats/uptime/reachability.
37735 - When an application is using socks5, give him the whole variety of
37736 potential socks5 responses (connect refused, host unreachable, etc),
37737 rather than just "success" or "failure".
37738 - A more sane version numbering system. See
37739 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
37740 - New contributed script "exitlist": a simple python script to
37741 parse directories and find Tor nodes that exit to listed
37743 - New contributed script "privoxy-tor-toggle" to toggle whether
37744 Privoxy uses Tor. Seems to be configured for Debian by default.
37745 - Report HTTP reasons to client when getting a response from directory
37746 servers -- so you can actually know what went wrong.
37747 - New config option MaxAdvertisedBandwidth which lets you advertise
37748 a low bandwidthrate (to not attract as many circuits) while still
37749 allowing a higher bandwidthrate in reality.
37751 o Robustness/stability fixes:
37752 - Make Tor use Niels Provos's libevent instead of its current
37753 poll-but-sometimes-select mess. This will let us use faster async
37754 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
37756 - pthread support now too. This was forced because when we forked,
37757 we ended up wasting a lot of duplicate ram over time. Also switch
37758 to foo_r versions of some library calls to allow reentry and
37760 - Better handling for heterogeneous / unreliable nodes:
37761 - Annotate circuits w/ whether they aim to contain high uptime nodes
37762 and/or high capacity nodes. When building circuits, choose
37764 - This means that every single node in an intro rend circuit,
37765 not just the last one, will have a minimum uptime.
37766 - New config option LongLivedPorts to indicate application streams
37767 that will want high uptime circuits.
37768 - Servers reset uptime when a dir fetch entirely fails. This
37769 hopefully reflects stability of the server's network connectivity.
37770 - If somebody starts his tor server in Jan 2004 and then fixes his
37771 clock, don't make his published uptime be a year.
37772 - Reset published uptime when you wake up from hibernation.
37773 - Introduce a notion of 'internal' circs, which are chosen without
37774 regard to the exit policy of the last hop. Intro and rendezvous
37775 circs must be internal circs, to avoid leaking information. Resolve
37776 and connect streams can use internal circs if they want.
37777 - New circuit pooling algorithm: make sure to have enough circs around
37778 to satisfy any predicted ports, and also make sure to have 2 internal
37779 circs around if we've required internal circs lately (and with high
37780 uptime if we've seen that lately too).
37781 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
37782 which describes how often we retry making new circuits if current
37783 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
37784 how long we're willing to make use of an already-dirty circuit.
37785 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
37786 circ as necessary, if there are any completed ones lying around
37787 when we try to launch one.
37788 - Make hidden services try to establish a rendezvous for 30 seconds,
37789 rather than for n (where n=3) attempts to build a circuit.
37790 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
37791 "ShutdownWaitLength".
37792 - Try to be more zealous about calling connection_edge_end when
37793 things go bad with edge conns in connection.c.
37794 - Revise tor-spec to add more/better stream end reasons.
37795 - Revise all calls to connection_edge_end to avoid sending "misc",
37796 and to take errno into account where possible.
37799 - Fix a race condition that can trigger an assert, when we have a
37800 pending create cell and an OR connection fails right then.
37801 - Fix several double-mark-for-close bugs, e.g. where we were finding
37802 a conn for a cell even if that conn is already marked for close.
37803 - Make sequence of log messages when starting on win32 with no config
37804 file more reasonable.
37805 - When choosing an exit node for a new non-internal circ, don't take
37806 into account whether it'll be useful for any pending x.onion
37807 addresses -- it won't.
37808 - Turn addr_policy_compare from a tristate to a quadstate; this should
37809 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
37810 for google.com" problem.
37811 - Make "platform" string in descriptor more accurate for Win32 servers,
37812 so it's not just "unknown platform".
37813 - Fix an edge case in parsing config options (thanks weasel).
37814 If they say "--" on the commandline, it's not an option.
37815 - Reject odd-looking addresses at the client (e.g. addresses that
37816 contain a colon), rather than having the server drop them because
37818 - tor-resolve requests were ignoring .exit if there was a working circuit
37819 they could use instead.
37820 - REUSEADDR on normal platforms means you can rebind to the port
37821 right after somebody else has let it go. But REUSEADDR on win32
37822 means to let you bind to the port _even when somebody else
37823 already has it bound_! So, don't do that on Win32.
37824 - Change version parsing logic: a version is "obsolete" if it is not
37825 recommended and (1) there is a newer recommended version in the
37826 same series, or (2) there are no recommended versions in the same
37827 series, but there are some recommended versions in a newer series.
37828 A version is "new" if it is newer than any recommended version in
37830 - Stop most cases of hanging up on a socks connection without sending
37834 - Require BandwidthRate to be at least 20kB/s for servers.
37835 - When a dirserver causes you to give a warn, mention which dirserver
37837 - New config option DirAllowPrivateAddresses for authdirservers.
37838 Now by default they refuse router descriptors that have non-IP or
37839 private-IP addresses.
37840 - Stop publishing socksport in the directory, since it's not
37841 actually meant to be public. For compatibility, publish a 0 there
37843 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
37844 smart" value, that is low for servers and high for clients.
37845 - If our clock jumps forward by 100 seconds or more, assume something
37846 has gone wrong with our network and abandon all not-yet-used circs.
37847 - Warn when exit policy implicitly allows local addresses.
37848 - If we get an incredibly skewed timestamp from a dirserver mirror
37849 that isn't a verified OR, don't warn -- it's probably him that's
37851 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
37852 cookies to disk and doesn't log each web request to disk. (Thanks
37853 to Brett Carrington for pointing this out.)
37854 - When a client asks us for a dir mirror and we don't have one,
37855 launch an attempt to get a fresh one.
37856 - If we're hibernating and we get a SIGINT, exit immediately.
37857 - Add --with-dmalloc ./configure option, to track memory leaks.
37858 - And try to free all memory on closing, so we can detect what
37860 - Cache local dns resolves correctly even when they're .exit
37862 - Give a better warning when some other server advertises an
37863 ORPort that is actually an apache running ssl.
37864 - Add "opt hibernating 1" to server descriptor to make it clearer
37865 whether the server is hibernating.
37868 Changes in version 0.0.9.6 - 2005-03-24
37869 o Bugfixes on 0.0.9.x (crashes and asserts):
37870 - Add new end stream reasons to maintenance branch. Fix bug where
37871 reason (8) could trigger an assert. Prevent bug from recurring.
37872 - Apparently win32 stat wants paths to not end with a slash.
37873 - Fix assert triggers in assert_cpath_layer_ok(), where we were
37874 blowing away the circuit that conn->cpath_layer points to, then
37875 checking to see if the circ is well-formed. Backport check to make
37876 sure we dont use the cpath on a closed connection.
37877 - Prevent circuit_resume_edge_reading_helper() from trying to package
37878 inbufs for marked-for-close streams.
37879 - Don't crash on hup if your options->address has become unresolvable.
37880 - Some systems (like OS X) sometimes accept() a connection and tell
37881 you the remote host is 0.0.0.0:0. If this happens, due to some
37882 other mis-features, we get confused; so refuse the conn for now.
37884 o Bugfixes on 0.0.9.x (other):
37885 - Fix harmless but scary "Unrecognized content encoding" warn message.
37886 - Add new stream error reason: TORPROTOCOL reason means "you are not
37887 speaking a version of Tor I understand; say bye-bye to your stream."
37888 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
37889 into the future, now that we are more tolerant of skew. This
37890 resolves a bug where a Tor server would refuse to cache a directory
37891 because all the directories it gets are too far in the future;
37892 yet the Tor server never logs any complaints about clock skew.
37893 - Mac packaging magic: make man pages useable, and do not overwrite
37894 existing torrc files.
37895 - Make OS X log happily to /var/log/tor/tor.log
37898 Changes in version 0.0.9.5 - 2005-02-22
37899 o Bugfixes on 0.0.9.x:
37900 - Fix an assert race at exit nodes when resolve requests fail.
37901 - Stop picking unverified dir mirrors--it only leads to misery.
37902 - Patch from Matt Edman to make NT services work better. Service
37903 support is still not compiled into the executable by default.
37904 - Patch from Dmitri Bely so the Tor service runs better under
37905 the win32 SYSTEM account.
37906 - Make tor-resolve actually work (?) on Win32.
37907 - Fix a sign bug when getrlimit claims to have 4+ billion
37908 file descriptors available.
37909 - Stop refusing to start when bandwidthburst == bandwidthrate.
37910 - When create cells have been on the onion queue more than five
37911 seconds, just send back a destroy and take them off the list.
37914 Changes in version 0.0.9.4 - 2005-02-03
37915 o Bugfixes on 0.0.9:
37916 - Fix an assert bug that took down most of our servers: when
37917 a server claims to have 1 GB of bandwidthburst, don't
37919 - Don't crash as badly if we have spawned the max allowed number
37920 of dnsworkers, or we're out of file descriptors.
37921 - Block more file-sharing ports in the default exit policy.
37922 - MaxConn is now automatically set to the hard limit of max
37923 file descriptors we're allowed (ulimit -n), minus a few for
37925 - Give a clearer message when servers need to raise their
37926 ulimit -n when they start running out of file descriptors.
37927 - SGI Compatibility patches from Jan Schaumann.
37928 - Tolerate a corrupt cached directory better.
37929 - When a dirserver hasn't approved your server, list which one.
37930 - Go into soft hibernation after 95% of the bandwidth is used,
37931 not 99%. This is especially important for daily hibernators who
37932 have a small accounting max. Hopefully it will result in fewer
37933 cut connections when the hard hibernation starts.
37934 - Load-balance better when using servers that claim more than
37935 800kB/s of capacity.
37936 - Make NT services work (experimental, only used if compiled in).
37939 Changes in version 0.0.9.3 - 2005-01-21
37940 o Bugfixes on 0.0.9:
37941 - Backport the cpu use fixes from main branch, so busy servers won't
37942 need as much processor time.
37943 - Work better when we go offline and then come back, or when we
37944 run Tor at boot before the network is up. We do this by
37945 optimistically trying to fetch a new directory whenever an
37946 application request comes in and we think we're offline -- the
37947 human is hopefully a good measure of when the network is back.
37948 - Backport some minimal hidserv bugfixes: keep rend circuits open as
37949 long as you keep using them; actually publish hidserv descriptors
37950 shortly after they change, rather than waiting 20-40 minutes.
37951 - Enable Mac startup script by default.
37952 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
37953 - When you update AllowUnverifiedNodes or FirewallPorts via the
37954 controller's setconf feature, we were always appending, never
37956 - When you update HiddenServiceDir via setconf, it was screwing up
37957 the order of reading the lines, making it fail.
37958 - Do not rewrite a cached directory back to the cache; otherwise we
37959 will think it is recent and not fetch a newer one on startup.
37960 - Workaround for webservers that lie about Content-Encoding: Tor
37961 now tries to autodetect compressed directories and compression
37962 itself. This lets us Proxypass dir fetches through apache.
37965 Changes in version 0.0.9.2 - 2005-01-04
37966 o Bugfixes on 0.0.9 (crashes and asserts):
37967 - Fix an assert on startup when the disk is full and you're logging
37969 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
37970 style address, then we'd crash.
37971 - Fix an assert trigger when the running-routers string we get from
37972 a dirserver is broken.
37973 - Make worker threads start and run on win32. Now win32 servers
37975 - Bandaid (not actually fix, but now it doesn't crash) an assert
37976 where the dns worker dies mysteriously and the main Tor process
37977 doesn't remember anything about the address it was resolving.
37979 o Bugfixes on 0.0.9 (Win32):
37980 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
37981 name out of the warning/assert messages.
37982 - Fix a superficial "unhandled error on read" bug on win32.
37983 - The win32 installer no longer requires a click-through for our
37984 license, since our Free Software license grants rights but does not
37986 - Win32: When connecting to a dirserver fails, try another one
37987 immediately. (This was already working for non-win32 Tors.)
37988 - Stop trying to parse $HOME on win32 when hunting for default
37990 - Make tor-resolve.c work on win32 by calling network_init().
37992 o Bugfixes on 0.0.9 (other):
37993 - Make 0.0.9.x build on Solaris again.
37994 - Due to a fencepost error, we were blowing away the \n when reporting
37995 confvalue items in the controller. So asking for multiple config
37996 values at once couldn't work.
37997 - When listing circuits that are pending on an opening OR connection,
37998 if we're an OR we were listing circuits that *end* at us as
37999 being pending on every listener, dns/cpu worker, etc. Stop that.
38000 - Dirservers were failing to create 'running-routers' or 'directory'
38001 strings if we had more than some threshold of routers. Fix them so
38002 they can handle any number of routers.
38003 - Fix a superficial "Duplicate mark for close" bug.
38004 - Stop checking for clock skew for OR connections, even for servers.
38005 - Fix a fencepost error that was chopping off the last letter of any
38006 nickname that is the maximum allowed nickname length.
38007 - Update URLs in log messages so they point to the new website.
38008 - Fix a potential problem in mangling server private keys while
38009 writing to disk (not triggered yet, as far as we know).
38010 - Include the licenses for other free software we include in Tor,
38011 now that we're shipping binary distributions more regularly.
38014 Changes in version 0.0.9.1 - 2004-12-15
38015 o Bugfixes on 0.0.9:
38016 - Make hibernation actually work.
38017 - Make HashedControlPassword config option work.
38018 - When we're reporting event circuit status to a controller,
38019 don't use the stream status code.
38022 Changes in version 0.0.9 - 2004-12-12
38024 - Clean up manpage and torrc.sample file.
38025 - Clean up severities and text of log warnings.
38027 - Make servers trigger an assert when they enter hibernation.
38030 Changes in version 0.0.9rc7 - 2004-12-08
38031 o Bugfixes on 0.0.9rc:
38032 - Fix a stack-trashing crash when an exit node begins hibernating.
38033 - Avoid looking at unallocated memory while considering which
38034 ports we need to build circuits to cover.
38035 - Stop a sigpipe: when an 'end' cell races with eof from the app,
38036 we shouldn't hold-open-until-flush if the eof arrived first.
38037 - Fix a bug with init_cookie_authentication() in the controller.
38038 - When recommending new-format log lines, if the upper bound is
38039 LOG_ERR, leave it implicit.
38041 o Bugfixes on 0.0.8.1:
38042 - Fix a whole slew of memory leaks.
38043 - Fix isspace() and friends so they still make Solaris happy
38044 but also so they don't trigger asserts on win32.
38045 - Fix parse_iso_time on platforms without strptime (eg win32).
38046 - win32: tolerate extra "readable" events better.
38047 - win32: when being multithreaded, leave parent fdarray open.
38048 - Make unit tests work on win32.
38051 Changes in version 0.0.9rc6 - 2004-12-06
38052 o Bugfixes on 0.0.9pre:
38053 - Clean up some more integer underflow opportunities (not exploitable
38055 - While hibernating, hup should not regrow our listeners.
38056 - Send an end to the streams we close when we hibernate, rather
38057 than just chopping them off.
38058 - React to eof immediately on non-open edge connections.
38060 o Bugfixes on 0.0.8.1:
38061 - Calculate timeout for waiting for a connected cell from the time
38062 we sent the begin cell, not from the time the stream started. If
38063 it took a long time to establish the circuit, we would time out
38064 right after sending the begin cell.
38065 - Fix router_compare_addr_to_addr_policy: it was not treating a port
38066 of * as always matching, so we were picking reject *:* nodes as
38067 exit nodes too. Oops.
38070 - New circuit building strategy: keep a list of ports that we've
38071 used in the past 6 hours, and always try to have 2 circuits open
38072 or on the way that will handle each such port. Seed us with port
38073 80 so web users won't complain that Tor is "slow to start up".
38074 - Make kill -USR1 dump more useful stats about circuits.
38075 - When warning about retrying or giving up, print the address, so
38076 the user knows which one it's talking about.
38077 - If you haven't used a clean circuit in an hour, throw it away,
38078 just to be on the safe side. (This means after 6 hours a totally
38079 unused Tor client will have no circuits open.)
38082 Changes in version 0.0.9rc5 - 2004-12-01
38083 o Bugfixes on 0.0.8.1:
38084 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
38085 - Let resolve conns retry/expire also, rather than sticking around
38087 - If we are using select, make sure we stay within FD_SETSIZE.
38089 o Bugfixes on 0.0.9pre:
38090 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
38091 but doesn't seem to be currently; thanks to Ilja van Sprundel for
38093 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
38094 instead. Impose minima and maxima for all *Period options; impose
38095 even tighter maxima for fetching if we are a caching dirserver.
38096 Clip rather than rejecting.
38097 - Fetch cached running-routers from servers that serve it (that is,
38098 authdirservers and servers running 0.0.9rc5-cvs or later.)
38101 - Accept *:706 (silc) in default exit policy.
38102 - Implement new versioning format for post 0.1.
38103 - Support "foo.nickname.exit" addresses, to let Alice request the
38104 address "foo" as viewed by exit node "nickname". Based on a patch
38106 - Make tor --version --version dump the cvs Id of every file.
38109 Changes in version 0.0.9rc4 - 2004-11-28
38110 o Bugfixes on 0.0.8.1:
38111 - Make windows sockets actually non-blocking (oops), and handle
38112 win32 socket errors better.
38114 o Bugfixes on 0.0.9rc1:
38115 - Actually catch the -USR2 signal.
38118 Changes in version 0.0.9rc3 - 2004-11-25
38119 o Bugfixes on 0.0.8.1:
38120 - Flush the log file descriptor after we print "Tor opening log file",
38121 so we don't see those messages days later.
38123 o Bugfixes on 0.0.9rc1:
38124 - Make tor-resolve work again.
38125 - Avoid infinite loop in tor-resolve if tor hangs up on it.
38126 - Fix an assert trigger for clients/servers handling resolves.
38129 Changes in version 0.0.9rc2 - 2004-11-24
38130 o Bugfixes on 0.0.9rc1:
38131 - I broke socks5 support while fixing the eof bug.
38132 - Allow unitless bandwidths and intervals; they default to bytes
38134 - New servers don't start out hibernating; they are active until
38135 they run out of bytes, so they have a better estimate of how
38136 long it takes, and so their operators can know they're working.
38139 Changes in version 0.0.9rc1 - 2004-11-23
38140 o Bugfixes on 0.0.8.1:
38141 - Finally fix a bug that's been plaguing us for a year:
38142 With high load, circuit package window was reaching 0. Whenever
38143 we got a circuit-level sendme, we were reading a lot on each
38144 socket, but only writing out a bit. So we would eventually reach
38145 eof. This would be noticed and acted on even when there were still
38146 bytes sitting in the inbuf.
38147 - When poll() is interrupted, we shouldn't believe the revents values.
38149 o Bugfixes on 0.0.9pre6:
38150 - Fix hibernate bug that caused pre6 to be broken.
38151 - Don't keep rephist info for routers that haven't had activity for
38152 24 hours. (This matters now that clients have keys, since we track
38154 - Never call close_temp_logs while validating log options.
38155 - Fix backslash-escaping on tor.sh.in and torctl.in.
38158 - Implement weekly/monthly/daily accounting: now you specify your
38159 hibernation properties by
38160 AccountingMax N bytes|KB|MB|GB|TB
38161 AccountingStart day|week|month [day] HH:MM
38162 Defaults to "month 1 0:00".
38163 - Let bandwidth and interval config options be specified as 5 bytes,
38164 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
38165 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
38166 get back to normal.)
38167 - If your requested entry or exit node has advertised bandwidth 0,
38169 - Be more greedy about filling up relay cells -- we try reading again
38170 once we've processed the stuff we read, in case enough has arrived
38171 to fill the last cell completely.
38172 - Apply NT service patch from Osamu Fujino. Still needs more work.
38175 Changes in version 0.0.9pre6 - 2004-11-15
38176 o Bugfixes on 0.0.8.1:
38177 - Fix assert failure on malformed socks4a requests.
38178 - Use identity comparison, not nickname comparison, to choose which
38179 half of circuit-ID-space each side gets to use. This is needed
38180 because sometimes we think of a router as a nickname, and sometimes
38181 as a hex ID, and we can't predict what the other side will do.
38182 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
38183 write() call will fail and we handle it there.
38184 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
38185 and smartlist_len, which are two major profiling offenders.
38187 o Bugfixes on 0.0.9pre5:
38188 - Fix a bug in read_all that was corrupting config files on windows.
38189 - When we're raising the max number of open file descriptors to
38190 'unlimited', don't log that we just raised it to '-1'.
38191 - Include event code with events, as required by control-spec.txt.
38192 - Don't give a fingerprint when clients do --list-fingerprint:
38193 it's misleading, because it will never be the same again.
38194 - Stop using strlcpy in tor_strndup, since it was slowing us
38196 - Remove warn on startup about missing cached-directory file.
38197 - Make kill -USR1 work again.
38198 - Hibernate if we start tor during the "wait for wakeup-time" phase
38199 of an accounting interval. Log our hibernation plans better.
38200 - Authoritative dirservers now also cache their directory, so they
38201 have it on start-up.
38204 - Fetch running-routers; cache running-routers; compress
38205 running-routers; serve compressed running-routers.z
38206 - Add NSI installer script contributed by J Doe.
38207 - Commit VC6 and VC7 workspace/project files.
38208 - Commit a tor.spec for making RPM files, with help from jbash.
38209 - Add contrib/torctl.in contributed by Glenn Fink.
38210 - Implement the control-spec's SAVECONF command, to write your
38211 configuration to torrc.
38212 - Get cookie authentication for the controller closer to working.
38213 - Include control-spec.txt in the tarball.
38214 - When set_conf changes our server descriptor, upload a new copy.
38215 But don't upload it too often if there are frequent changes.
38216 - Document authentication config in man page, and document signals
38218 - Clean up confusing parts of man page and torrc.sample.
38219 - Make expand_filename handle ~ and ~username.
38220 - Use autoconf to enable largefile support where necessary. Use
38221 ftello where available, since ftell can fail at 2GB.
38222 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
38223 log more informatively.
38224 - Give a slightly more useful output for "tor -h".
38225 - Refuse application socks connections to port 0.
38226 - Check clock skew for verified servers, but allow unverified
38227 servers and clients to have any clock skew.
38228 - Break DirFetchPostPeriod into:
38229 - DirFetchPeriod for fetching full directory,
38230 - StatusFetchPeriod for fetching running-routers,
38231 - DirPostPeriod for posting server descriptor,
38232 - RendPostPeriod for posting hidden service descriptors.
38233 - Make sure the hidden service descriptors are at a random offset
38234 from each other, to hinder linkability.
38237 Changes in version 0.0.9pre5 - 2004-11-09
38238 o Bugfixes on 0.0.9pre4:
38239 - Fix a seg fault in unit tests (doesn't affect main program).
38240 - Fix an assert bug where a hidden service provider would fail if
38241 the first hop of his rendezvous circuit was down.
38242 - Hidden service operators now correctly handle version 1 style
38243 INTRODUCE1 cells (nobody generates them still, so not a critical
38245 - If do_hup fails, actually notice.
38246 - Handle more errnos from accept() without closing the listener.
38247 Some OpenBSD machines were closing their listeners because
38248 they ran out of file descriptors.
38249 - Send resolve cells to exit routers that are running a new
38250 enough version of the resolve code to work right.
38251 - Better handling of winsock includes on non-MSV win32 compilers.
38252 - Some people had wrapped their tor client/server in a script
38253 that would restart it whenever it died. This did not play well
38254 with our "shut down if your version is obsolete" code. Now people
38255 don't fetch a new directory if their local cached version is
38257 - Make our autogen.sh work on ksh as well as bash.
38260 - Hibernation: New config option "AccountingMaxKB" lets you
38261 set how many KBytes per month you want to allow your server to
38262 consume. Rather than spreading those bytes out evenly over the
38263 month, we instead hibernate for some of the month and pop up
38264 at a deterministic time, work until the bytes are consumed, then
38265 hibernate again. Config option "MonthlyAccountingStart" lets you
38266 specify which day of the month your billing cycle starts on.
38267 - Control interface: a separate program can now talk to your
38268 client/server over a socket, and get/set config options, receive
38269 notifications of circuits and streams starting/finishing/dying,
38270 bandwidth used, etc. The next step is to get some GUIs working.
38271 Let us know if you want to help out. See doc/control-spec.txt .
38272 - Ship a contrib/tor-control.py as an example script to interact
38273 with the control port.
38274 - "tor --hash-password zzyxz" will output a salted password for
38275 use in authenticating to the control interface.
38276 - New log format in config:
38277 "Log minsev[-maxsev] stdout|stderr|syslog" or
38278 "Log minsev[-maxsev] file /var/foo"
38281 - DirPolicy config option, to let people reject incoming addresses
38282 from their dirserver.
38283 - "tor --list-fingerprint" will list your identity key fingerprint
38285 - Add "pass" target for RedirectExit, to make it easier to break
38286 out of a sequence of RedirectExit rules.
38287 - Clients now generate a TLS cert too, in preparation for having
38288 them act more like real nodes.
38289 - Ship src/win32/ in the tarball, so people can use it to build.
38290 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38292 - New "router-status" line in directory, to better bind each verified
38293 nickname to its identity key.
38294 - Deprecate unofficial config option abbreviations, and abbreviations
38295 not on the command line.
38296 - Add a pure-C tor-resolve implementation.
38297 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38298 1024) file descriptors.
38300 o Code security improvements, inspired by Ilja:
38301 - Replace sprintf with snprintf. (I think they were all safe, but
38303 - Replace strcpy/strncpy with strlcpy in more places.
38304 - Avoid strcat; use snprintf or strlcat instead.
38305 - snprintf wrapper with consistent (though not C99) overflow behavior.
38308 Changes in version 0.0.9pre4 - 2004-10-17
38309 o Bugfixes on 0.0.9pre3:
38310 - If the server doesn't specify an exit policy, use the real default
38311 exit policy, not reject *:*.
38312 - Ignore fascistfirewall when uploading/downloading hidden service
38313 descriptors, since we go through Tor for those; and when using
38314 an HttpProxy, since we assume it can reach them all.
38315 - When looking for an authoritative dirserver, use only the ones
38316 configured at boot. Don't bother looking in the directory.
38317 - The rest of the fix for get_default_conf_file() on older win32.
38318 - Make 'Routerfile' config option obsolete.
38321 - New 'MyFamily nick1,...' config option for a server to
38322 specify other servers that shouldn't be used in the same circuit
38323 with it. Only believed if nick1 also specifies us.
38324 - New 'NodeFamily nick1,nick2,...' config option for a client to
38325 specify nodes that it doesn't want to use in the same circuit.
38326 - New 'Redirectexit pattern address:port' config option for a
38327 server to redirect exit connections, e.g. to a local squid.
38330 Changes in version 0.0.9pre3 - 2004-10-13
38331 o Bugfixes on 0.0.8.1:
38332 - Better torrc example lines for dirbindaddress and orbindaddress.
38333 - Improved bounds checking on parsed ints (e.g. config options and
38334 the ones we find in directories.)
38335 - Better handling of size_t vs int, so we're more robust on 64
38337 - Fix the rest of the bug where a newly started OR would appear
38338 as unverified even after we've added his fingerprint and hupped
38340 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38341 close it without sending back an end. So 'connection refused'
38342 would simply be ignored and the user would get no response.
38344 o Bugfixes on 0.0.9pre2:
38345 - Serving the cached-on-disk directory to people is bad. We now
38346 provide no directory until we've fetched a fresh one.
38347 - Workaround for bug on windows where cached-directories get crlf
38349 - Make get_default_conf_file() work on older windows too.
38350 - If we write a *:* exit policy line in the descriptor, don't write
38351 any more exit policy lines.
38354 - Use only 0.0.9pre1 and later servers for resolve cells.
38355 - Make the dirservers file obsolete.
38356 - Include a dir-signing-key token in directories to tell the
38357 parsing entity which key is being used to sign.
38358 - Remove the built-in bulky default dirservers string.
38359 - New config option "Dirserver %s:%d [fingerprint]", which can be
38360 repeated as many times as needed. If no dirservers specified,
38361 default to moria1,moria2,tor26.
38362 - Make moria2 advertise a dirport of 80, so people behind firewalls
38363 will be able to get a directory.
38364 - Http proxy support
38365 - Dirservers translate requests for http://%s:%d/x to /x
38366 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38367 be routed through this host.
38368 - Clients ask for /tor/x rather than /x for new enough dirservers.
38369 This way we can one day coexist peacefully with apache.
38370 - Clients specify a "Host: %s%d" http header, to be compatible
38371 with more proxies, and so running squid on an exit node can work.
38374 Changes in version 0.0.8.1 - 2004-10-13
38376 - Fix a seg fault that can be triggered remotely for Tor
38377 clients/servers with an open dirport.
38378 - Fix a rare assert trigger, where routerinfos for entries in
38379 our cpath would expire while we're building the path.
38380 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38381 - Fix a rare seg fault for people running hidden services on
38382 intermittent connections.
38383 - Fix a bug in parsing opt keywords with objects.
38384 - Fix a stale pointer assert bug when a stream detaches and
38386 - Fix a string format vulnerability (probably not exploitable)
38387 in reporting stats locally.
38388 - Fix an assert trigger: sometimes launching circuits can fail
38389 immediately, e.g. because too many circuits have failed recently.
38390 - Fix a compile warning on 64 bit platforms.
38393 Changes in version 0.0.9pre2 - 2004-10-03
38395 - Make fetching a cached directory work for 64-bit platforms too.
38396 - Make zlib.h a required header, not an optional header.
38399 Changes in version 0.0.9pre1 - 2004-10-01
38401 - Stop using separate defaults for no-config-file and
38402 empty-config-file. Now you have to explicitly turn off SocksPort,
38403 if you don't want it open.
38404 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38405 - Improve man page to mention more of the 0.0.8 features.
38406 - Fix a rare seg fault for people running hidden services on
38407 intermittent connections.
38408 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38410 - Fix more dns related bugs: send back resolve_failed and end cells
38411 more reliably when the resolve fails, rather than closing the
38412 circuit and then trying to send the cell. Also attach dummy resolve
38413 connections to a circuit *before* calling dns_resolve(), to fix
38414 a bug where cached answers would never be sent in RESOLVED cells.
38415 - When we run out of disk space, or other log writing error, don't
38416 crash. Just stop logging to that log and continue.
38417 - We were starting to daemonize before we opened our logs, so if
38418 there were any problems opening logs, we would complain to stderr,
38419 which wouldn't work, and then mysteriously exit.
38420 - Fix a rare bug where sometimes a verified OR would connect to us
38421 before he'd uploaded his descriptor, which would cause us to
38422 assign conn->nickname as though he's unverified. Now we look through
38423 the fingerprint list to see if he's there.
38424 - Fix a rare assert trigger, where routerinfos for entries in
38425 our cpath would expire while we're building the path.
38428 - Clients can ask dirservers for /dir.z to get a compressed version
38429 of the directory. Only works for servers running 0.0.9, of course.
38430 - Make clients cache directories and use them to seed their router
38431 lists at startup. This means clients have a datadir again.
38432 - Configuration infrastructure support for warning on obsolete
38434 - Respond to content-encoding headers by trying to uncompress as
38436 - Reply with a deflated directory when a client asks for "dir.z".
38437 We could use allow-encodings instead, but allow-encodings isn't
38438 specified in HTTP 1.0.
38439 - Raise the max dns workers from 50 to 100.
38440 - Discourage people from setting their dirfetchpostperiod more often
38441 than once per minute.
38442 - Protect dirservers from overzealous descriptor uploading -- wait
38443 10 seconds after directory gets dirty, before regenerating.
38446 Changes in version 0.0.8 - 2004-08-25
38447 o Port it to SunOS 5.9 / Athena
38450 Changes in version 0.0.8rc2 - 2004-08-20
38451 o Make it compile on cygwin again.
38452 o When picking unverified routers, skip those with low uptime and/or
38453 low bandwidth, depending on what properties you care about.
38456 Changes in version 0.0.8rc1 - 2004-08-18
38457 o Changes from 0.0.7.3:
38459 - Fix assert triggers: if the other side returns an address 0.0.0.0,
38460 don't put it into the client dns cache.
38461 - If a begin failed due to exit policy, but we believe the IP address
38462 should have been allowed, switch that router to exitpolicy reject *:*
38463 until we get our next directory.
38465 - Clients choose nodes proportional to advertised bandwidth.
38466 - Avoid using nodes with low uptime as introduction points.
38467 - Handle servers with dynamic IP addresses: don't replace
38468 options->Address with the resolved one at startup, and
38469 detect our address right before we make a routerinfo each time.
38470 - 'FascistFirewall' option to pick dirservers and ORs on specific
38471 ports; plus 'FirewallPorts' config option to tell FascistFirewall
38472 which ports are open. (Defaults to 80,443)
38473 - Be more aggressive about trying to make circuits when the network
38474 has changed (e.g. when you unsuspend your laptop).
38475 - Check for time skew on http headers; report date in response to
38477 - If the entrynode config line has only one node, don't pick it as
38479 - Add strict{entry|exit}nodes config options. If set to 1, then
38480 we refuse to build circuits that don't include the specified entry
38482 - OutboundBindAddress config option, to bind to a specific
38483 IP address for outgoing connect()s.
38484 - End truncated log entries (e.g. directories) with "[truncated]".
38486 o Patches to 0.0.8preX:
38488 - Patches to compile and run on win32 again (maybe)?
38489 - Fix crash when looking for ~/.torrc with no $HOME set.
38490 - Fix a race bug in the unit tests.
38491 - Handle verified/unverified name collisions better when new
38492 routerinfo's arrive in a directory.
38493 - Sometimes routers were getting entered into the stats before
38494 we'd assigned their identity_digest. Oops.
38495 - Only pick and establish intro points after we've gotten a
38498 - AllowUnverifiedNodes config option to let circuits choose no-name
38499 routers in entry,middle,exit,introduction,rendezvous positions.
38500 Allow middle and rendezvous positions by default.
38501 - Add a man page for tor-resolve.
38504 Changes in version 0.0.7.3 - 2004-08-12
38505 o Stop dnsworkers from triggering an assert failure when you
38506 ask them to resolve the host "".
38509 Changes in version 0.0.8pre3 - 2004-08-09
38510 o Changes from 0.0.7.2:
38511 - Allow multiple ORs with same nickname in routerlist -- now when
38512 people give us one identity key for a nickname, then later
38513 another, we don't constantly complain until the first expires.
38514 - Remember used bandwidth (both in and out), and publish 15-minute
38515 snapshots for the past day into our descriptor.
38516 - You can now fetch $DIRURL/running-routers to get just the
38517 running-routers line, not the whole descriptor list. (But
38518 clients don't use this yet.)
38519 - When people mistakenly use Tor as an http proxy, point them
38520 at the tor-doc.html rather than the INSTALL.
38521 - Remove our mostly unused -- and broken -- hex_encode()
38522 function. Use base16_encode() instead. (Thanks to Timo Lindfors
38523 for pointing out this bug.)
38524 - Rotate onion keys every 12 hours, not every 2 hours, so we have
38525 fewer problems with people using the wrong key.
38526 - Change the default exit policy to reject the default edonkey,
38527 kazaa, gnutella ports.
38528 - Add replace_file() to util.[ch] to handle win32's rename().
38530 o Changes from 0.0.8preX:
38531 - Fix two bugs in saving onion keys to disk when rotating, so
38532 hopefully we'll get fewer people using old onion keys.
38533 - Fix an assert error that was making SocksPolicy not work.
38534 - Be willing to expire routers that have an open dirport -- it's
38535 just the authoritative dirservers we want to not forget.
38536 - Reject tor-resolve requests for .onion addresses early, so we
38537 don't build a whole rendezvous circuit and then fail.
38538 - When you're warning a server that he's unverified, don't cry
38539 wolf unpredictably.
38540 - Fix a race condition: don't try to extend onto a connection
38541 that's still handshaking.
38542 - For servers in clique mode, require the conn to be open before
38543 you'll choose it for your path.
38544 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
38545 end relay cell, etc.
38546 - Measure bandwidth capacity over the last 24 hours, not just 12
38547 - Bugfix: authoritative dirservers were making and signing a new
38548 directory for each client, rather than reusing the cached one.
38551 Changes in version 0.0.8pre2 - 2004-08-04
38552 o Changes from 0.0.7.2:
38554 - Check directory signature _before_ you decide whether you're
38555 you're running an obsolete version and should exit.
38556 - Check directory signature _before_ you parse the running-routers
38557 list to decide who's running or verified.
38558 - Bugfixes and features:
38559 - Check return value of fclose while writing to disk, so we don't
38560 end up with broken files when servers run out of disk space.
38561 - Log a warning if the user uses an unsafe socks variant, so people
38562 are more likely to learn about privoxy or socat.
38563 - Dirservers now include RFC1123-style dates in the HTTP headers,
38564 which one day we will use to better detect clock skew.
38566 o Changes from 0.0.8pre1:
38567 - Make it compile without warnings again on win32.
38568 - Log a warning if you're running an unverified server, to let you
38569 know you might want to get it verified.
38570 - Only pick a default nickname if you plan to be a server.
38573 Changes in version 0.0.8pre1 - 2004-07-23
38575 - Made our unit tests compile again on OpenBSD 3.5, and tor
38576 itself compile again on OpenBSD on a sparc64.
38577 - We were neglecting milliseconds when logging on win32, so
38578 everything appeared to happen at the beginning of each second.
38580 o Protocol changes:
38581 - 'Extend' relay cell payloads now include the digest of the
38582 intended next hop's identity key. Now we can verify that we're
38583 extending to the right router, and also extend to routers we
38584 hadn't heard of before.
38587 - Tor nodes can now act as relays (with an advertised ORPort)
38588 without being manually verified by the dirserver operators.
38589 - Uploaded descriptors of unverified routers are now accepted
38590 by the dirservers, and included in the directory.
38591 - Verified routers are listed by nickname in the running-routers
38592 list; unverified routers are listed as "$<fingerprint>".
38593 - We now use hash-of-identity-key in most places rather than
38594 nickname or addr:port, for improved security/flexibility.
38595 - To avoid Sybil attacks, paths still use only verified servers.
38596 But now we have a chance to play around with hybrid approaches.
38597 - Nodes track bandwidth usage to estimate capacity (not used yet).
38598 - ClientOnly option for nodes that never want to become servers.
38599 - Directory caching.
38600 - "AuthoritativeDir 1" option for the official dirservers.
38601 - Now other nodes (clients and servers) will cache the latest
38602 directory they've pulled down.
38603 - They can enable their DirPort to serve it to others.
38604 - Clients will pull down a directory from any node with an open
38605 DirPort, and check the signature/timestamp correctly.
38606 - Authoritative dirservers now fetch directories from other
38607 authdirservers, to stay better synced.
38608 - Running-routers list tells who's down also, along with noting
38609 if they're verified (listed by nickname) or unverified (listed
38611 - Allow dirservers to serve running-router list separately.
38612 This isn't used yet.
38613 - ORs connect-on-demand to other ORs
38614 - If you get an extend cell to an OR you're not connected to,
38615 connect, handshake, and forward the create cell.
38616 - The authoritative dirservers stay connected to everybody,
38617 and everybody stays connected to 0.0.7 servers, but otherwise
38618 clients/servers expire unused connections after 5 minutes.
38619 - When servers get a sigint, they delay 30 seconds (refusing new
38620 connections) then exit. A second sigint causes immediate exit.
38621 - File and name management:
38622 - Look for .torrc if no CONFDIR "torrc" is found.
38623 - If no datadir is defined, then choose, make, and secure ~/.tor
38625 - If torrc not found, exitpolicy reject *:*.
38626 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
38627 - If no nickname is defined, derive default from hostname.
38628 - Rename secret key files, e.g. identity.key -> secret_id_key,
38629 to discourage people from mailing their identity key to tor-ops.
38630 - Refuse to build a circuit before the directory has arrived --
38631 it won't work anyway, since you won't know the right onion keys
38633 - Try other dirservers immediately if the one you try is down. This
38634 should tolerate down dirservers better now.
38635 - Parse tor version numbers so we can do an is-newer-than check
38636 rather than an is-in-the-list check.
38637 - New socks command 'resolve', to let us shim gethostbyname()
38639 - A 'tor_resolve' script to access the socks resolve functionality.
38640 - A new socks-extensions.txt doc file to describe our
38641 interpretation and extensions to the socks protocols.
38642 - Add a ContactInfo option, which gets published in descriptor.
38643 - Publish OR uptime in descriptor (and thus in directory) too.
38644 - Write tor version at the top of each log file
38645 - New docs in the tarball:
38647 - Document that you should proxy your SSL traffic too.
38650 Changes in version 0.0.7.2 - 2004-07-07
38651 o A better fix for the 0.0.0.0 problem, that will hopefully
38652 eliminate the remaining related assertion failures.
38655 Changes in version 0.0.7.1 - 2004-07-04
38656 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
38657 since internally we use 0.0.0.0 to signify "not yet resolved".
38660 Changes in version 0.0.7 - 2004-06-07
38661 o Updated the man page to reflect the new features.
38664 Changes in version 0.0.7rc2 - 2004-06-06
38665 o Changes from 0.0.7rc1:
38666 - Make it build on Win32 again.
38667 o Changes from 0.0.6.2:
38668 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
38672 Changes in version 0.0.7rc1 - 2004-06-02
38674 - On sighup, we were adding another log without removing the first
38675 one. So log messages would get duplicated n times for n sighups.
38676 - Several cases of using a connection after we'd freed it. The
38677 problem was that connections that are pending resolve are in both
38678 the pending_resolve tree, and also the circuit's resolving_streams
38679 list. When you want to remove one, you must remove it from both.
38680 - Fix a double-mark-for-close where an end cell arrived for a
38681 resolving stream, and then the resolve failed.
38682 - Check directory signatures based on name of signer, not on whom
38683 we got the directory from. This will let us cache directories more
38686 - Crank up some of our constants to handle more users.
38689 Changes in version 0.0.7pre1 - 2004-06-02
38690 o Fixes for crashes and other obnoxious bugs:
38691 - Fix an epipe bug: sometimes when directory connections failed
38692 to connect, we would give them a chance to flush before closing
38694 - When we detached from a circuit because of resolvefailed, we
38695 would immediately try the same circuit twice more, and then
38696 give up on the resolve thinking we'd tried three different
38698 - Limit the number of intro circuits we'll attempt to build for a
38699 hidden service per 15-minute period.
38700 - Check recommended-software string *early*, before actually parsing
38701 the directory. Thus we can detect an obsolete version and exit,
38702 even if the new directory format doesn't parse.
38703 o Fixes for security bugs:
38704 - Remember which nodes are dirservers when you startup, and if a
38705 random OR enables his dirport, don't automatically assume he's
38706 a trusted dirserver.
38708 - Directory connections were asking the wrong poll socket to
38709 start writing, and not asking themselves to start writing.
38710 - When we detached from a circuit because we sent a begin but
38711 didn't get a connected, we would use it again the first time;
38712 but after that we would correctly switch to a different one.
38713 - Stop warning when the first onion decrypt attempt fails; they
38714 will sometimes legitimately fail now that we rotate keys.
38715 - Override unaligned-access-ok check when $host_cpu is ia64 or
38716 arm. Apparently they allow it but the kernel whines.
38717 - Dirservers try to reconnect periodically too, in case connections
38719 - Fix some memory leaks in directory servers.
38720 - Allow backslash in Win32 filenames.
38721 - Made Tor build complain-free on FreeBSD, hopefully without
38722 breaking other BSD builds. We'll see.
38724 - Doxygen markup on all functions and global variables.
38725 - Make directory functions update routerlist, not replace it. So
38726 now directory disagreements are not so critical a problem.
38727 - Remove the upper limit on number of descriptors in a dirserver's
38728 directory (not that we were anywhere close).
38729 - Allow multiple logfiles at different severity ranges.
38730 - Allow *BindAddress to specify ":port" rather than setting *Port
38731 separately. Allow multiple instances of each BindAddress config
38732 option, so you can bind to multiple interfaces if you want.
38733 - Allow multiple exit policy lines, which are processed in order.
38734 Now we don't need that huge line with all the commas in it.
38735 - Enable accept/reject policies on SOCKS connections, so you can bind
38736 to 0.0.0.0 but still control who can use your OP.
38739 Changes in version 0.0.6.2 - 2004-05-16
38740 o Our integrity-checking digest was checking only the most recent cell,
38741 not the previous cells like we'd thought.
38742 Thanks to Stefan Mark for finding the flaw!
38745 Changes in version 0.0.6.1 - 2004-05-06
38746 o Fix two bugs in our AES counter-mode implementation (this affected
38747 onion-level stream encryption, but not TLS-level). It turns
38748 out we were doing something much more akin to a 16-character
38749 polyalphabetic cipher. Oops.
38750 Thanks to Stefan Mark for finding the flaw!
38751 o Retire moria3 as a directory server, and add tor26 as a directory
38755 Changes in version 0.0.6 - 2004-05-02
38756 [version bump only]
38759 Changes in version 0.0.6rc4 - 2004-05-01
38760 o Update the built-in dirservers list to use the new directory format
38761 o Fix a rare seg fault: if a node offering a hidden service attempts
38762 to build a circuit to Alice's rendezvous point and fails before it
38763 reaches the last hop, it retries with a different circuit, but
38765 o Handle windows socket errors correctly.
38768 Changes in version 0.0.6rc3 - 2004-04-28
38769 o Don't expire non-general excess circuits (if we had enough
38770 circuits open, we were expiring rendezvous circuits -- even
38771 when they had a stream attached. oops.)
38772 o Fetch randomness from /dev/urandom better (not via fopen/fread)
38773 o Better debugging for tls errors
38774 o Some versions of openssl have an SSL_pending function that erroneously
38775 returns bytes when there is a non-application record pending.
38776 o Set Content-Type on the directory and hidserv descriptor.
38777 o Remove IVs from cipher code, since AES-ctr has none.
38778 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
38779 o We were using an array of length zero in a few places.
38780 o win32's gethostbyname can't resolve an IP to an IP.
38781 o win32's close can't close a socket.
38784 Changes in version 0.0.6rc2 - 2004-04-26
38785 o Fix a bug where we were closing tls connections intermittently.
38786 It turns out openssl keeps its errors around -- so if an error
38787 happens, and you don't ask about it, and then another openssl
38788 operation happens and succeeds, and you ask if there was an error,
38789 it tells you about the first error. Fun fun.
38790 o Fix a bug that's been lurking since 27 may 03 (!)
38791 When passing back a destroy cell, we would use the wrong circ id.
38792 'Mostly harmless', but still worth fixing.
38793 o Since we don't support truncateds much, don't bother sending them;
38794 just close the circ.
38795 o check for <machine/limits.h> so we build on NetBSD again (I hope).
38796 o don't crash if a conn that sent a begin has suddenly lost its circuit
38797 (this was quite rare).
38800 Changes in version 0.0.6rc1 - 2004-04-25
38801 o We now rotate link (tls context) keys and onion keys.
38802 o CREATE cells now include oaep padding, so you can tell
38803 if you decrypted them correctly.
38804 o Add bandwidthburst to server descriptor.
38805 o Directories now say which dirserver signed them.
38806 o Use a tor_assert macro that logs failed assertions too.
38809 Changes in version 0.0.6pre5 - 2004-04-18
38810 o changes from 0.0.6pre4:
38811 - make tor build on broken freebsd 5.2 installs
38812 - fix a failed assert when you try an intro point, get a nack, and try
38813 a second one and it works.
38814 - when alice uses a port that the hidden service doesn't accept,
38815 it now sends back an end cell (denied by exit policy). otherwise
38816 alice would just have to wait to time out.
38817 - fix another rare bug: when we had tried all the intro
38818 points for a hidden service, we fetched the descriptor
38819 again, but we left our introcirc thinking it had already
38820 sent an intro, so it kept waiting for a response...
38821 - bugfix: when you sleep your hidden-service laptop, as soon
38822 as it wakes up it tries to upload a service descriptor, but
38823 socketpair fails for some reason (localhost not up yet?).
38824 now we simply give up on that upload, and we'll try again later.
38825 i'd still like to find the bug though.
38826 - if an intro circ waiting for an ack dies before getting one, then
38828 - we were reusing stale service descriptors and refetching usable
38832 Changes in version 0.0.6pre4 - 2004-04-14
38833 o changes from 0.0.6pre3:
38834 - when bob fails to connect to the rendezvous point, and his
38835 circ didn't fail because of the rendezvous point itself, then
38836 he retries a couple of times
38837 - we expire introduction and rendezvous circs more thoroughly
38838 (sometimes they were hanging around forever)
38839 - we expire unattached rendezvous streams that have been around
38840 too long (they were sticking around forever).
38841 - fix a measly fencepost error that was crashing everybody with
38845 Changes in version 0.0.6pre3 - 2004-04-14
38846 o changes from 0.0.6pre2:
38847 - make hup work again
38848 - fix some memory leaks for dirservers
38849 - allow more skew in rendezvous descriptor timestamps, to help
38850 handle people like blanu who don't know what time it is
38851 - normal circs are 3 hops, but some rend/intro circs are 4, if
38852 the initiator doesn't get to choose the last hop
38853 - send acks for introductions, so alice can know whether to try
38855 - bob publishes intro points more correctly
38856 o changes from 0.0.5:
38857 - fix an assert trigger that's been plaguing us since the days
38858 of 0.0.2prexx (thanks weasel!)
38859 - retry stream correctly when we fail to connect because of
38860 exit-policy-reject (should try another) or can't-resolve-address
38861 (also should try another, because dns on random internet servers
38863 - when we hup a dirserver and we've *removed* a server from the
38864 approved-routers list, now we remove that server from the
38865 in-memory directories too
38868 Changes in version 0.0.6pre2 - 2004-04-08
38869 o We fixed our base32 implementation. Now it works on all architectures.
38872 Changes in version 0.0.6pre1 - 2004-04-08
38874 - Hidden services and rendezvous points are implemented. Go to
38875 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
38876 hidden services. (This only works via a socks4a proxy such as
38877 Privoxy, and currently it's quite slow.)
38880 Changes in version 0.0.5 - 2004-03-30
38881 [version bump only]
38884 Changes in version 0.0.5rc3 - 2004-03-29
38885 o Install torrc as torrc.sample -- we no longer clobber your
38887 o Re-enable recommendedversion checking (we broke it in rc2, oops)
38888 o Add in a 'notice' log level for things the operator should hear
38889 but that aren't warnings
38892 Changes in version 0.0.5rc2 - 2004-03-29
38893 o Hold socks connection open until reply is flushed (if possible)
38894 o Make exit nodes resolve IPs to IPs immediately, rather than asking
38895 the dns farm to do it.
38896 o Fix c99 aliasing warnings in rephist.c
38897 o Don't include server descriptors that are older than 24 hours in the
38899 o Give socks 'reject' replies their whole 15s to attempt to flush,
38900 rather than seeing the 60s timeout and assuming the flush had failed.
38901 o Clean automake droppings from the cvs repository
38904 Changes in version 0.0.5rc1 - 2004-03-28
38905 o Fix mangled-state bug in directory fetching (was causing sigpipes).
38906 o Only build circuits after we've fetched the directory: clients were
38907 using only the directory servers before they'd fetched a directory.
38908 This also means longer startup time; so it goes.
38909 o Fix an assert trigger where an OP would fail to handshake, and we'd
38910 expect it to have a nickname.
38911 o Work around a tsocks bug: do a socks reject when AP connection dies
38912 early, else tsocks goes into an infinite loop.
38915 Changes in version 0.0.4 - 2004-03-26
38916 o When connecting to a dirserver or OR and the network is down,
38920 Changes in version 0.0.3 - 2004-03-26
38921 o Warn and fail if server chose a nickname with illegal characters
38922 o Port to Solaris and Sparc:
38923 - include missing header fcntl.h
38924 - have autoconf find -lsocket -lnsl automatically
38925 - deal with hardware word alignment
38926 - make uname() work (solaris has a different return convention)
38927 - switch from using signal() to sigaction()
38928 o Preliminary work on reputation system:
38929 - Keep statistics on success/fail of connect attempts; they're published
38930 by kill -USR1 currently.
38931 - Add a RunTesting option to try to learn link state by creating test
38932 circuits, even when SocksPort is off.
38933 - Remove unused open circuits when there are too many.
38936 Changes in version 0.0.2 - 2004-03-19
38937 - Include strlcpy and strlcat for safer string ops
38938 - define INADDR_NONE so we compile (but still not run) on solaris
38941 Changes in version 0.0.2pre27 - 2004-03-14
38943 - Allow internal tor networks (we were rejecting internal IPs,
38944 now we allow them if they're set explicitly).
38945 - And fix a few endian issues.
38948 Changes in version 0.0.2pre26 - 2004-03-14
38950 - If a stream times out after 15s without a connected cell, don't
38951 try that circuit again: try a new one.
38952 - Retry streams at most 4 times. Then give up.
38953 - When a dirserver gets a descriptor from an unknown router, it
38954 logs its fingerprint (so the dirserver operator can choose to
38955 accept it even without mail from the server operator).
38956 - Inform unapproved servers when we reject their descriptors.
38957 - Make tor build on Windows again. It works as a client, who knows
38959 - Clearer instructions in the torrc for how to set up a server.
38960 - Be more efficient about reading fd's when our global token bucket
38961 (used for rate limiting) becomes empty.
38963 - Stop asserting that computers always go forward in time. It's
38965 - When we sent a cell (e.g. destroy) and then marked an OR connection
38966 expired, we might close it before finishing a flush if the other
38967 side isn't reading right then.
38968 - Don't allow dirservers to start if they haven't defined
38969 RecommendedVersions
38970 - We were caching transient dns failures. Oops.
38971 - Prevent servers from publishing an internal IP as their address.
38972 - Address a strcat vulnerability in circuit.c
38975 Changes in version 0.0.2pre25 - 2004-03-04
38977 - Put the OR's IP in its router descriptor, not its fqdn. That way
38978 we'll stop being stalled by gethostbyname for nodes with flaky dns,
38981 - If the user typed in an address that didn't resolve, the server
38985 Changes in version 0.0.2pre24 - 2004-03-03
38987 - Fix an assertion failure in dns.c, where we were trying to dequeue
38988 a pending dns resolve even if it wasn't pending
38989 - Fix a spurious socks5 warning about still trying to write after the
38990 connection is finished.
38991 - Hold certain marked_for_close connections open until they're finished
38992 flushing, rather than losing bytes by closing them too early.
38993 - Correctly report the reason for ending a stream
38994 - Remove some duplicate calls to connection_mark_for_close
38995 - Put switch_id and start_daemon earlier in the boot sequence, so it
38996 will actually try to chdir() to options.DataDirectory
38997 - Make 'make test' exit(1) if a test fails; fix some unit tests
38998 - Make tor fail when you use a config option it doesn't know about,
38999 rather than warn and continue.
39000 - Make --version work
39001 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
39004 Changes in version 0.0.2pre23 - 2004-02-29
39006 - Print a statement when the first circ is finished, so the user
39007 knows it's working.
39008 - If a relay cell is unrecognized at the end of the circuit,
39009 send back a destroy. (So attacks to mutate cells are more
39011 - New config option 'excludenodes' to avoid certain nodes for circuits.
39012 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
39013 so you can collect coredumps there.
39015 - Fix a bug in tls flushing where sometimes data got wedged and
39016 didn't flush until more data got sent. Hopefully this bug was
39017 a big factor in the random delays we were seeing.
39018 - Make 'connected' cells include the resolved IP, so the client
39019 dns cache actually gets populated.
39020 - Disallow changing from ORPort=0 to ORPort>0 on hup.
39021 - When we time-out on a stream and detach from the circuit, send an
39022 end cell down it first.
39023 - Only warn about an unknown router (in exitnodes, entrynodes,
39024 excludenodes) after we've fetched a directory.
39027 Changes in version 0.0.2pre22 - 2004-02-26
39029 - Servers publish less revealing uname information in descriptors.
39030 - More memory tracking and assertions, to crash more usefully when
39032 - If the default torrc isn't there, just use some default defaults.
39033 Plus provide an internal dirservers file if they don't have one.
39034 - When the user tries to use Tor as an http proxy, give them an http
39035 501 failure explaining that we're a socks proxy.
39036 - Dump a new router.desc on hup, to help confused people who change
39037 their exit policies and then wonder why router.desc doesn't reflect
39039 - Clean up the generic tor.sh init script that we ship with.
39041 - If the exit stream is pending on the resolve, and a destroy arrives,
39042 then the stream wasn't getting removed from the pending list. I
39043 think this was the one causing recent server crashes.
39044 - Use a more robust poll on OSX 10.3, since their poll is flaky.
39045 - When it couldn't resolve any dirservers, it was useless from then on.
39046 Now it reloads the RouterFile (or default dirservers) if it has no
39048 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
39049 many users don't even *have* a /usr/local/sbin/.
39052 Changes in version 0.0.2pre21 - 2004-02-18
39054 - There's a ChangeLog file that actually reflects the changelog.
39055 - There's a 'torify' wrapper script, with an accompanying
39056 tor-tsocks.conf, that simplifies the process of using tsocks for
39057 tor. It even has a man page.
39058 - The tor binary gets installed to sbin rather than bin now.
39059 - Retry streams where the connected cell hasn't arrived in 15 seconds
39060 - Clean up exit policy handling -- get the default out of the torrc,
39061 so we can update it without forcing each server operator to fix
39063 - Allow imaps and pop3s in default exit policy
39065 - Prevent picking middleman nodes as the last node in the circuit
39068 Changes in version 0.0.2pre20 - 2004-01-30
39070 - We now have a deb package, and it's in debian unstable. Go to
39071 it, apt-getters. :)
39072 - I've split the TotalBandwidth option into BandwidthRate (how many
39073 bytes per second you want to allow, long-term) and
39074 BandwidthBurst (how many bytes you will allow at once before the cap
39075 kicks in). This better token bucket approach lets you, say, set
39076 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
39077 performance while not exceeding your monthly bandwidth quota.
39078 - Push out a tls record's worth of data once you've got it, rather
39079 than waiting until you've read everything waiting to be read. This
39080 may improve performance by pipelining better. We'll see.
39081 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
39082 from failed circuits (if they haven't been connected yet) and attach
39084 - Expire old streams that haven't managed to connect. Some day we'll
39085 have them reattach to new circuits instead.
39088 - Fix several memory leaks that were causing servers to become bloated
39090 - Fix a few very rare assert triggers. A few more remain.
39091 - Setuid to User _before_ complaining about running as root.
39094 Changes in version 0.0.2pre19 - 2004-01-07
39096 - Fix deadlock condition in dns farm. We were telling a child to die by
39097 closing the parent's file descriptor to him. But newer children were
39098 inheriting the open file descriptor from the parent, and since they
39099 weren't closing it, the socket never closed, so the child never read
39100 eof, so he never knew to exit. Similarly, dns workers were holding
39101 open other sockets, leading to all sorts of chaos.
39102 - New cleaner daemon() code for forking and backgrounding.
39103 - If you log to a file, it now prints an entry at the top of the
39104 logfile so you know it's working.
39105 - The onionskin challenge length was 30 bytes longer than necessary.
39106 - Started to patch up the spec so it's not quite so out of date.
39109 Changes in version 0.0.2pre18 - 2004-01-02
39111 - Fix endian issues with the 'integrity' field in the relay header.
39112 - Fix a potential bug where connections in state
39113 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
39116 Changes in version 0.0.2pre17 - 2003-12-30
39118 - Made --debuglogfile (or any second log file, actually) work.
39119 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
39120 adversary could force us into an infinite loop.
39123 - Each onionskin handshake now includes a hash of the computed key,
39124 to prove the server's identity and help perfect forward secrecy.
39125 - Changed cell size from 256 to 512 bytes (working toward compatibility
39127 - Changed cell length to 2 bytes, and moved it to the relay header.
39128 - Implemented end-to-end integrity checking for the payloads of
39130 - Separated streamid from 'recognized' (otherwise circuits will get
39131 messed up when we try to have streams exit from the middle). We
39132 use the integrity-checking to confirm that a cell is addressed to
39134 - Randomize the initial circid and streamid values, so an adversary who
39135 breaks into a node can't learn how many circuits or streams have
39139 Changes in version 0.0.2pre16 - 2003-12-14
39141 - Fixed a bug that made HUP trigger an assert
39142 - Fixed a bug where a circuit that immediately failed wasn't being
39143 counted as a failed circuit in counting retries.
39146 - Now we close the circuit when we get a truncated cell: otherwise we're
39147 open to an anonymity attack where a bad node in the path truncates
39148 the circuit and then we open streams at him.
39149 - Add port ranges to exit policies
39150 - Add a conservative default exit policy
39151 - Warn if you're running tor as root
39152 - on HUP, retry OR connections and close/rebind listeners
39153 - options.EntryNodes: try these nodes first when picking the first node
39154 - options.ExitNodes: if your best choices happen to include any of
39155 your preferred exit nodes, you choose among just those preferred
39157 - options.ExcludedNodes: nodes that are never picked in path building
39160 Changes in version 0.0.2pre15 - 2003-12-03
39161 o Robustness and bugfixes:
39162 - Sometimes clients would cache incorrect DNS resolves, which would
39163 really screw things up.
39164 - An OP that goes offline would slowly leak all its sockets and stop
39166 - A wide variety of bugfixes in exit node selection, exit policy
39167 handling, and processing pending streams when a new circuit is
39169 - Pick nodes for a path only from those the directory says are up
39170 - Choose randomly from all running dirservers, not always the first one
39171 - Increase allowed http header size for directory fetch.
39172 - Stop writing to stderr (if we're daemonized it will be closed).
39173 - Enable -g always, so cores will be more useful to me.
39174 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
39177 - Wrote a man page. It lists commonly used options.
39180 - Change default loglevel to warn.
39181 - Make PidFile default to null rather than littering in your CWD.
39182 - OnionRouter config option is now obsolete. Instead it just checks
39184 - Moved to a single unified torrc file for both clients and servers.
39187 Changes in version 0.0.2pre14 - 2003-11-29
39188 o Robustness and bugfixes:
39189 - Force the admin to make the DataDirectory himself
39190 - to get ownership/permissions right
39191 - so clients no longer make a DataDirectory and then never use it
39192 - fix bug where a client who was offline for 45 minutes would never
39193 pull down a directory again
39194 - fix (or at least hide really well) the dns assert bug that was
39195 causing server crashes
39196 - warnings and improved robustness wrt clockskew for certs
39197 - use the native daemon(3) to daemonize, when available
39198 - exit if bind() fails
39199 - exit if neither socksport nor orport is defined
39200 - include our own tor_timegm (Win32 doesn't have its own)
39201 - bugfix for win32 with lots of connections
39202 - fix minor bias in PRNG
39203 - make dirserver more robust to corrupt cached directory
39206 - Wrote the design document (woo)
39208 o Circuit building and exit policies:
39209 - Circuits no longer try to use nodes that the directory has told them
39211 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
39212 bitcounts (18.0.0.0/8).
39213 - Make AP connections standby for a circuit if no suitable circuit
39214 exists, rather than failing
39215 - Circuits choose exit node based on addr/port, exit policies, and
39216 which AP connections are standing by
39217 - Bump min pathlen from 2 to 3
39218 - Relay end cells have a payload to describe why the stream ended.
39219 - If the stream failed because of exit policy, try again with a new
39221 - Clients have a dns cache to remember resolved addresses.
39222 - Notice more quickly when we have no working circuits
39225 - APPort is now called SocksPort
39226 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
39228 - RecommendedVersions is now a config variable rather than
39229 hardcoded (for dirservers)
39230 - Reloads config on HUP
39231 - Usage info on -h or --help
39232 - If you set User and Group config vars, it'll setu/gid to them.
39235 Changes in version 0.0.2pre13 - 2003-10-19
39236 o General stability:
39237 - SSL_write no longer fails when it returns WANTWRITE and the number
39238 of bytes in the buf has changed by the next SSL_write call.
39239 - Fix segfault fetching directory when network is down
39240 - Fix a variety of minor memory leaks
39241 - Dirservers reload the fingerprints file on HUP, so I don't have
39242 to take down the network when I approve a new router
39243 - Default server config file has explicit Address line to specify fqdn
39246 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39247 - Make listener connections not ever alloc bufs
39249 o Autoconf improvements:
39250 - don't clobber an external CFLAGS in ./configure
39251 - Make install now works
39252 - create var/lib/tor on make install
39253 - autocreate a tor.sh initscript to help distribs
39254 - autocreate the torrc and sample-server-torrc with correct paths
39256 o Log files and Daemonizing now work:
39257 - If --DebugLogFile is specified, log to it at -l debug
39258 - If --LogFile is specified, use it instead of commandline
39259 - If --RunAsDaemon is set, tor forks and backgrounds on startup