1 Changes in version 0.4.7.2-alpha - 2021-10-26
2 This second alpha release of the 0.4.7.x series adds two major
3 features: congestion control (prop324) for network performance, and
4 the MiddleOnly flag (prop335) voted by the authorities to pin relays
5 to the middle position for various network health reasons. This
6 release also fixes numerous bugs.
8 The congestion control feature, detailed in proposal 324, still needs
9 more work before we can enable it by default. It is currently in its
10 testing and tuning phase which means that you should expect more
11 0.4.7.x alphas as congestion control gets stabilized and tuned for
12 optimal performance. And so, at this release, it can not be used
13 without a custom patch.
15 o Major features (congestion control):
16 - Implement support for flow control over congestion controlled
17 circuits. This work comes from proposal 324. Closes ticket 40450.
19 o Major features (directory authority):
20 - Add a new consensus method to handle MiddleOnly specially. When
21 enough authorities are using this method, then any relay tagged
22 with the MiddleOnly flag will have its Exit, Guard, HSDir, and
23 V2Dir flags automatically cleared, and will have its BadExit flag
24 automatically set. Implements part of proposal 335.
25 - Authorities can now be configured to label relays as "MiddleOnly".
26 When voting for this flag, authorities automatically vote against
27 Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
28 part of proposal 335. Based on a patch from Neel Chauhan.
30 o Major bugfix (relay, metrics):
31 - On the MetricsPort, the DNS error statistics are not reported by
32 record type ("record=...") anymore due to a libevent bug
33 (https://github.com/libevent/libevent/issues/1219). Fixes bug
34 40490; bugfix on 0.4.7.1-alpha.
36 o Major bugfixes (relay, overload state):
37 - Relays report the general overload state for DNS timeout errors
38 only if X% of all DNS queries over Y seconds are errors. Before
39 that, it only took 1 timeout to report the overload state which
40 was just too low of a threshold. The X and Y values are 1% and 10
41 minutes respectively but they are also controlled by consensus
42 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
44 o Minor feature (authority, relay):
45 - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
46 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
48 o Minor feature (onion service v2):
49 - Onion service v2 addresses are now not recognized anymore by tor
50 meaning a bad hostname is returned when attempting to pass it on a
51 SOCKS connection. No more deprecation log is emitted client side.
53 - See https://blog.torproject.org/v2-deprecation-timeline for
54 details on how to transition from v2 to v3.
56 o Minor features (fallbackdir):
57 - Regenerate fallback directories for October 2021. Closes
60 o Minor features (logging, heartbeat):
61 - When a relay receives a cell that isn't encrypted properly for it,
62 but the relay is the last hop on the circuit, the relay now counts
63 how many cells of this kind it receives, on how many circuits, and
64 reports this information in the log. Previously, we'd log each
65 cell at PROTOCOL_WARN level, which is far too verbose to be
66 useful. Fixes part of ticket 40400.
68 o Minor features (testing):
69 - We now have separate fuzzers for the inner layers of v3 onion
70 service descriptors, to prevent future bugs like 40392. Closes
73 o Minor bugfixes (compilation):
74 - Fix compilation error when __NR_time is not defined. Fixes bug
75 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
77 o Minor bugfixes (dirauth, bandwidth scanner):
78 - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
79 to avoid voting on bandwidth scanner weights to v3 directory
80 authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
83 o Minor bugfixes (fragile-hardening, sandbox):
84 - When building with --enable-fragile-hardening, add or relax Linux
85 seccomp rules to allow AddressSanitizer to execute normally if the
86 process terminates with the sandbox active. This has the side
87 effect of disabling the filtering of file- and directory-open
88 requests on most systems and dilutes the effectiveness of the
89 sandbox overall, as a wider range of system calls must be
90 permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
92 o Minor bugfixes (logging):
93 - If a channel has never received or transmitted a cell, or seen a
94 client, do not calculate time diffs against 1/1/1970 but log a
95 better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
97 o Minor bugfixes (onion service):
98 - Fix a warning BUG that would occur often on heavily loaded onion
99 service leading to filling the logs with useless warnings. Fixes
100 bug 34083; bugfix on 0.3.2.1-alpha.
102 o Minor bugfix (CI, onion service):
103 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
104 bugfix on 0.3.2.1-alpha.
106 o Minor bugfixes (onion service, config):
107 - Fix a memory leak for a small config line string that could occur
108 if the onion service failed to be configured from file properly.
109 Fixes bug 40484; bugfix on 0.3.2.1-alpha.
111 o Minor bugfixes (onion service, TROVE-2021-008):
112 - Only log v2 access attempts once total, in order to not pollute
113 the logs with warnings and to avoid recording the times on disk
114 when v2 access was attempted. Note that the onion address was
115 _never_ logged. This counts as a Low-severity security issue.
116 Fixes bug 40474; bugfix on 0.4.5.8.
117 - Note that due to #40476 which removes v2 support entirely, this
118 log line is not emitted anymore. We still mention this in the
119 changelog because it is a Low-severity TROVE.
121 o Minor bugfixes (usability):
122 - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
123 at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
124 happen naturally if a client gives up on a rendezvous circuit
125 after sending INTRODUCE1. Fixes part of bug 40400; bugfix
127 - Do not log "circuit_receive_relay_cell failed" at
128 LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
129 would want to log this as a protocol warning, we are already
130 logging another warning from inside circuit_receive_relay_cell.
131 Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
133 o Code simplification and refactoring:
134 - Lower the official maximum for "guard-extreme-restriction-percent"
135 to 100. This has no effect on when the guard code will generate a
136 warning, but it makes the intent of the option clearer. Fixes bug
137 40486; bugfix on 0.3.0.1-alpha.
140 - Add unit tests for the Linux seccomp sandbox. Resolves
143 o Code simplification and refactoring (rust):
144 - Remove Rust support and its associated code. It is unsupported and
145 Rust focus should be shifted to arti. Closes ticket 40469.
147 o Testing (CI, chutney):
148 - Bump the data size that chutney transmits to 5MBytes in order to
149 trigger the flow control and congestion window code. Closes
153 Changes in version 0.4.6.8 - 2021-10-26
154 This version fixes several bugs from earlier versions of Tor. One
155 highlight is a fix on how we track DNS timeouts to report general
158 o Major bugfixes (relay, overload state):
159 - Relays report the general overload state for DNS timeout errors
160 only if X% of all DNS queries over Y seconds are errors. Before
161 that, it only took 1 timeout to report the overload state which
162 was just too low of a threshold. The X and Y values are 1% and 10
163 minutes respectively but they are also controlled by consensus
164 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
166 o Minor features (fallbackdir):
167 - Regenerate fallback directories for October 2021. Closes
170 o Minor features (testing):
171 - On a testing network, relays can now use the
172 TestingMinTimeToReportBandwidth option to change the smallest
173 amount of time over which they're willing to report their observed
174 maximum bandwidth. Previously, this was fixed at 1 day. For
175 safety, values under 2 hours are only supported on testing
176 networks. Part of a fix for ticket 40337.
177 - Relays on testing networks no longer rate-limit how frequently
178 they are willing to report new bandwidth measurements. Part of a
179 fix for ticket 40337.
180 - Relays on testing networks now report their observed bandwidths
181 immediately from startup. Previously, they waited until they had
182 been running for a full day. Closes ticket 40337.
184 o Minor bugfix (onion service):
185 - Do not flag an HSDir as non-running in case the descriptor upload
186 or fetch fails. An onion service closes pending directory
187 connections before uploading a new descriptor which can thus lead
188 to wrongly flagging many relays and thus affecting circuit building
189 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
190 - Improve logging when a bad HS version is given. Fixes bug 40476;
191 bugfix on 0.4.6.1-alpha.
193 o Minor bugfix (CI, onion service):
194 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
195 bugfix on 0.3.2.1-alpha.
197 o Minor bugfixes (compatibility):
198 - Fix compatibility with the most recent Libevent versions, which no
199 longer have an evdns_set_random_bytes() function. Because this
200 function has been a no-op since Libevent 2.0.4-alpha, it is safe
201 for us to just stop calling it. Fixes bug 40371; bugfix
204 o Minor bugfixes (onion service, TROVE-2021-008):
205 - Only log v2 access attempts once total, in order to not pollute
206 the logs with warnings and to avoid recording the times on disk
207 when v2 access was attempted. Note that the onion address was
208 _never_ logged. This counts as a Low-severity security issue.
209 Fixes bug 40474; bugfix on 0.4.5.8.
212 Changes in version 0.4.5.11 - 2021-10-26
213 The major change in this version is that v2 onion services are now
214 disabled at the client, service, and relay: any Tor nodes running this
215 version and onward will stop supporting v2 onion services. This is the
216 last step in the long deprecation process of v2 onion services.
217 Everyone running an earlier version, whether as a client, a relay, or
218 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
221 o Major feature (onion service v2):
222 - See https://blog.torproject.org/v2-deprecation-timeline for
223 details on how to transition from v2 to v3.
224 - The control port commands HSFETCH and HSPOST no longer allow
225 version 2, and it is no longer possible to create a v2 service
227 - Tor no longer allows creating v2 services, or connecting as a
228 client to a v2 service. Relays will decline to be a v2 HSDir or
229 introduction point. This effectively disables onion service
230 version 2 Tor-wide. Closes ticket 40476.
232 o Minor features (bridge, backport from 0.4.6.8):
233 - We now announce the URL to Tor's new bridge status at
234 https://bridges.torproject.org/ when Tor is configured to run as a
235 bridge relay. Closes ticket 30477.
237 o Minor features (fallbackdir):
238 - Regenerate fallback directories for October 2021. Closes
241 o Minor features (logging, diagnostic, backport from 0.4.6.5):
242 - Log decompression failures at a higher severity level, since they
243 can help provide missing context for other warning messages. We
244 rate-limit these messages, to avoid flooding the logs if they
245 begin to occur frequently. Closes ticket 40175.
247 o Minor features (testing, backport from 0.4.6.8):
248 - On a testing network, relays can now use the
249 TestingMinTimeToReportBandwidth option to change the smallest
250 amount of time over which they're willing to report their observed
251 maximum bandwidth. Previously, this was fixed at 1 day. For
252 safety, values under 2 hours are only supported on testing
253 networks. Part of a fix for ticket 40337.
254 - Relays on testing networks no longer rate-limit how frequently
255 they are willing to report new bandwidth measurements. Part of a
256 fix for ticket 40337.
257 - Relays on testing networks now report their observed bandwidths
258 immediately from startup. Previously, they waited until they had
259 been running for a full day. Closes ticket 40337.
261 o Minor bugfix (CI, onion service):
262 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
263 bugfix on 0.3.2.1-alpha.
265 o Minor bugfix (onion service, backport from 0.4.6.8):
266 - Do not flag an HSDir as non-running in case the descriptor upload
267 or fetch fails. An onion service closes pending directory
268 connections before uploading a new descriptor which can thus lead
269 to wrongly flagging many relays and thus affecting circuit building
270 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
272 o Minor bugfixes (compatibility, backport from 0.4.6.8):
273 - Fix compatibility with the most recent Libevent versions, which no
274 longer have an evdns_set_random_bytes() function. Because this
275 function has been a no-op since Libevent 2.0.4-alpha, it is safe
276 for us to just stop calling it. Fixes bug 40371; bugfix
279 o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
280 - Avoid a set of bugs that could be caused by inconsistently
281 preferring an out-of-date consensus stored in a stale directory
282 cache over a more recent one stored on disk as the latest
283 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
285 o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
286 - Only log v2 access attempts once total, in order to not pollute
287 the logs with warnings and to avoid recording the times on disk
288 when v2 access was attempted. Note that the onion address was
289 _never_ logged. This counts as a Low-severity security issue.
290 Fixes bug 40474; bugfix on 0.4.5.8.
293 Changes in version 0.3.5.17 - 2021-10-26
294 The major change in this version is that v2 onion services are now
295 disabled at the client, service, and relay: any Tor nodes running this
296 version and onward will stop supporting v2 onion services. This is the
297 last step in the long deprecation process of v2 onion services.
298 Everyone running an earlier version, whether as a client, a relay, or
299 an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
302 o Major feature (onion service v2, backport from 0.4.5.11):
303 - See https://blog.torproject.org/v2-deprecation-timeline for
304 details on how to transition from v2 to v3.
305 - The control port commands HSFETCH and HSPOST no longer allow
306 version 2, and it is no longer possible to create a v2 service
308 - Tor no longer allows creating v2 services, or connecting as a
309 client to a v2 service. Relays will decline to be a v2 HSDir or
310 introduction point. This effectively disables onion service
311 version 2 Tor-wide. Closes ticket 40476.
313 o Minor features (bridge, backport from 0.4.6.8):
314 - We now announce the URL to Tor's new bridge status at
315 https://bridges.torproject.org/ when Tor is configured to run as a
316 bridge relay. Closes ticket 30477.
318 o Minor features (fallbackdir):
319 - Regenerate fallback directories for October 2021. Closes
322 o Minor bugfixes (compatibility, backport from 0.4.6.8):
323 - Fix compatibility with the most recent Libevent versions, which no
324 longer have an evdns_set_random_bytes() function. Because this
325 function has been a no-op since Libevent 2.0.4-alpha, it is safe
326 for us to just stop calling it. Fixes bug 40371; bugfix
330 Changes in version 0.4.7.1-alpha - 2021-09-17
331 This version is the first alpha release of the 0.4.7.x series. One
332 major feature is Vanguards Lite, from proposal 333, to help mitigate
333 guard discovery attacks against onion services. It also includes
336 o Major features (Proposal 332, onion services, guard selection algorithm):
337 - Clients and onion services now choose four long-lived "layer 2"
338 guard relays for use as the middle hop in all onion circuits.
339 These relays are kept in place for a randomized duration averaging
340 1 week. This mitigates guard discovery attacks against clients and
341 short-lived onion services such as OnionShare. Long-lived onion
342 services that need high security should still use the Vanguards
343 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
344 40363; implements proposal 333.
346 o Minor features (bridge testing support):
347 - Let external bridge reachability testing tools discard cached
348 bridge descriptors when setting new bridges, so they can be sure
349 to get a clean reachability test. Implements ticket 40209.
351 o Minor features (fuzzing):
352 - When building with --enable-libfuzzer, use a set of compiler flags
353 that works with more recent versions of the library. Previously we
354 were using a set of flags from 2017. Closes ticket 40407.
356 o Minor features (testing configuration):
357 - When TestingTorNetwork is enabled, skip the permissions check on
358 hidden service directories. Closes ticket 40338.
359 - On a testing network, relays can now use the
360 TestingMinTimeToReportBandwidth option to change the smallest
361 amount of time over which they're willing to report their observed
362 maximum bandwidth. Previously, this was fixed at 1 day. For
363 safety, values under 2 hours are only supported on testing
364 networks. Part of a fix for ticket 40337.
365 - Relays on testing networks no longer rate-limit how frequently
366 they are willing to report new bandwidth measurements. Part of a
367 fix for ticket 40337.
368 - Relays on testing networks now report their observed bandwidths
369 immediately from startup. Previously, they waited until they had
370 been running for a full day. Closes ticket 40337.
372 o Minor bugfixes (circuit padding):
373 - Don't send STOP circuit padding cells when the other side has
374 already shut down the corresponding padding machine. Fixes bug
375 40435; bugfix on 0.4.0.1-alpha.
377 o Minor bugfixes (compatibility):
378 - Fix compatibility with the most recent Libevent versions, which no
379 longer have an evdns_set_random_bytes() function. Because this
380 function has been a no-op since Libevent 2.0.4-alpha, it is safe
381 for us to just stop calling it. Fixes bug 40371; bugfix
384 o Minor bugfixes (control, sandbox):
385 - Allows the control command SAVECONF to succeed when the seccomp
386 sandbox is enabled. Makes SAVECONF keep only one backup file, to
387 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
388 Patch by Daniel Pinto.
390 o Minor bugfixes (heartbeat):
391 - Adjust the heartbeat log message about distinct clients to
392 consider the HeartbeatPeriod rather than a flat 6-hour delay.
393 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
395 o Minor bugfixes (logging, relay):
396 - Add spaces between the "and" when logging the "Your server has not
397 managed to confirm reachability for its" on dual-stack relays.
398 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
400 o Minor bugfixes (onion service):
401 - Do not flag an HSDir as non-running in case the descriptor upload
402 or fetch fails. An onion service closes pending directory
403 connections before uploading a new descriptor which leads to
404 wrongly flagging many relays and thus affecting circuit path
405 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
407 o Minor bugfixes (statistics):
408 - Fix a fencepost issue when we check stability_last_downrated where
409 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
410 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
412 o Minor bugfixes (tests):
413 - Fix a bug that prevented some tests from running with the correct
414 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
417 - Add links to original tor design paper and anonbib to
418 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
420 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
421 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
424 Changes in version 0.4.6.7 - 2021-08-16
425 This version fixes several bugs from earlier versions of Tor,
426 including one that could lead to a denial-of-service attack. Everyone
427 running an earlier version, whether as a client, a relay, or an onion
428 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
430 o Major bugfixes (cryptography, security):
431 - Resolve an assertion failure caused by a behavior mismatch between
432 our batch-signature verification code and our single-signature
433 verification code. This assertion failure could be triggered
434 remotely, leading to a denial of service attack. We fix this issue
435 by disabling batch verification. Fixes bug 40078; bugfix on
436 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
437 CVE-2021-38385. Found by Henry de Valence.
439 o Minor feature (fallbackdir):
440 - Regenerate fallback directories list. Close ticket 40447.
442 o Minor features (geoip data):
443 - Update the geoip files to match the IPFire Location Database, as
444 retrieved on 2021/08/12.
446 o Minor bugfix (crypto):
447 - Disable the unused batch verification feature of ed25519-donna.
448 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
451 o Minor bugfixes (onion service):
452 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
453 Address) for a v2 onion address. Fixes bug 40421; bugfix
456 o Minor bugfixes (relay):
457 - Reduce the compression level for data streaming from HIGH to LOW
458 in order to reduce CPU load on the directory relays. Fixes bug
459 40301; bugfix on 0.3.5.1-alpha.
461 o Minor bugfixes (timekeeping):
462 - Calculate the time of day correctly on systems where the time_t
463 type includes leap seconds. (This is not the case on most
464 operating systems, but on those where it occurs, our tor_timegm
465 function did not correctly invert the system's gmtime function,
466 which could result in assertion failures when calculating voting
467 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
470 Changes in version 0.4.5.10 - 2021-08-16
471 This version fixes several bugs from earlier versions of Tor,
472 including one that could lead to a denial-of-service attack. Everyone
473 running an earlier version, whether as a client, a relay, or an onion
474 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
476 o Major bugfixes (cryptography, security):
477 - Resolve an assertion failure caused by a behavior mismatch between
478 our batch-signature verification code and our single-signature
479 verification code. This assertion failure could be triggered
480 remotely, leading to a denial of service attack. We fix this issue
481 by disabling batch verification. Fixes bug 40078; bugfix on
482 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
483 CVE-2021-38385. Found by Henry de Valence.
485 o Minor feature (fallbackdir):
486 - Regenerate fallback directories list. Close ticket 40447.
488 o Minor features (geoip data):
489 - Update the geoip files to match the IPFire Location Database, as
490 retrieved on 2021/08/12.
492 o Minor features (testing):
493 - Enable the deterministic RNG for unit tests that covers the
494 address set bloomfilter-based API's. Fixes bug 40419; bugfix
497 o Minor bugfix (crypto, backport from 0.4.6.7):
498 - Disable the unused batch verification feature of ed25519-donna.
499 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
502 o Minor bugfixes (relay, backport from 0.4.6.7):
503 - Reduce the compression level for data streaming from HIGH to LOW.
504 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
506 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
507 - Calculate the time of day correctly on systems where the time_t
508 type includes leap seconds. (This is not the case on most
509 operating systems, but on those where it occurs, our tor_timegm
510 function did not correctly invert the system's gmtime function,
511 which could result in assertion failures when calculating voting
512 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
514 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
515 - Suppress a strict-prototype warning when building with some
516 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
519 Changes in version 0.3.5.16 - 2021-08-16
520 This version fixes several bugs from earlier versions of Tor,
521 including one that could lead to a denial-of-service attack. Everyone
522 running an earlier version, whether as a client, a relay, or an onion
523 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
525 o Major bugfixes (cryptography, security):
526 - Resolve an assertion failure caused by a behavior mismatch between
527 our batch-signature verification code and our single-signature
528 verification code. This assertion failure could be triggered
529 remotely, leading to a denial of service attack. We fix this issue
530 by disabling batch verification. Fixes bug 40078; bugfix on
531 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
532 CVE-2021-38385. Found by Henry de Valence.
534 o Minor feature (fallbackdir):
535 - Regenerate fallback directories list. Close ticket 40447.
537 o Minor features (geoip data):
538 - Update the geoip files to match the IPFire Location Database, as
539 retrieved on 2021/08/12.
541 o Minor bugfix (crypto, backport from 0.4.6.7):
542 - Disable the unused batch verification feature of ed25519-donna.
543 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
546 o Minor bugfixes (relay, backport from 0.4.6.7):
547 - Reduce the compression level for data streaming from HIGH to LOW.
548 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
551 Changes in version 0.4.6.6 - 2021-06-30
552 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
553 allows Tor to build correctly on older versions of GCC. You should
554 upgrade to this version if you were having trouble building Tor
555 0.4.6.5; otherwise, there is probably no need.
557 o Minor bugfixes (compilation):
558 - Fix a compilation error when trying to build Tor with a compiler
559 that does not support const variables in static initializers.
560 Fixes bug 40410; bugfix on 0.4.6.5.
561 - Suppress a strict-prototype warning when building with some
562 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
564 o Minor bugfixes (testing):
565 - Enable the deterministic RNG for unit tests that covers the
566 address set bloomfilter-based API's. Fixes bug 40419; bugfix
570 Changes in version 0.4.5.9 - 2021-06-14
571 Tor 0.4.5.9 fixes several security issues, including a
572 denial-of-service attack against onion service clients, and another
573 denial-of-service attack against relays. Everybody should upgrade to
574 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
576 o Major bugfixes (security, backport from 0.4.6.5):
577 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
578 half-closed streams. Previously, clients failed to validate which
579 hop sent these cells: this would allow a relay on a circuit to end
580 a stream that wasn't actually built with it. Fixes bug 40389;
581 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
582 003 and CVE-2021-34548.
584 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
585 - Detect more failure conditions from the OpenSSL RNG code.
586 Previously, we would detect errors from a missing RNG
587 implementation, but not failures from the RNG code itself.
588 Fortunately, it appears those failures do not happen in practice
589 when Tor is using OpenSSL's default RNG implementation. Fixes bug
590 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
591 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
593 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
594 - Resist a hashtable-based CPU denial-of-service attack against
595 relays. Previously we used a naive unkeyed hash function to look
596 up circuits in a circuitmux object. An attacker could exploit this
597 to construct circuits with chosen circuit IDs, to create
598 collisions and make the hash table inefficient. Now we use a
599 SipHash construction here instead. Fixes bug 40391; bugfix on
600 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
601 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
602 - Fix an out-of-bounds memory access in v3 onion service descriptor
603 parsing. An attacker could exploit this bug by crafting an onion
604 service descriptor that would crash any client that tried to visit
605 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
606 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
607 Glazunov from Google's Project Zero.
609 o Minor features (compatibility, backport from 0.4.6.4-rc):
610 - Remove an assertion function related to TLS renegotiation. It was
611 used nowhere outside the unit tests, and it was breaking
612 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
615 o Minor features (geoip data):
616 - Update the geoip files to match the IPFire Location Database, as
617 retrieved on 2021/06/10.
619 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
620 - Allow the control command SAVECONF to succeed when the seccomp
621 sandbox is enabled, and make SAVECONF keep only one backup file to
622 simplify implementation. Previously SAVECONF allowed a large
623 number of backup files, which made it incompatible with the
624 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
627 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
628 - Fix a bug that made tor try to re-bind() on an already open
629 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
633 Changes in version 0.4.4.9 - 2021-06-14
634 Tor 0.4.4.9 fixes several security issues, including a
635 denial-of-service attack against onion service clients, and another
636 denial-of-service attack against relays. Everybody should upgrade to
637 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
639 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
640 June 15. This is therefore the last release in its series. Everybody
641 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
643 o Major bugfixes (security, backport from 0.4.6.5):
644 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
645 half-closed streams. Previously, clients failed to validate which
646 hop sent these cells: this would allow a relay on a circuit to end
647 a stream that wasn't actually built with it. Fixes bug 40389;
648 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
649 003 and CVE-2021-34548.
651 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
652 - Detect more failure conditions from the OpenSSL RNG code.
653 Previously, we would detect errors from a missing RNG
654 implementation, but not failures from the RNG code itself.
655 Fortunately, it appears those failures do not happen in practice
656 when Tor is using OpenSSL's default RNG implementation. Fixes bug
657 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
658 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
660 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
661 - Resist a hashtable-based CPU denial-of-service attack against
662 relays. Previously we used a naive unkeyed hash function to look
663 up circuits in a circuitmux object. An attacker could exploit this
664 to construct circuits with chosen circuit IDs, to create
665 collisions and make the hash table inefficient. Now we use a
666 SipHash construction here instead. Fixes bug 40391; bugfix on
667 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
668 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
669 - Fix an out-of-bounds memory access in v3 onion service descriptor
670 parsing. An attacker could exploit this bug by crafting an onion
671 service descriptor that would crash any client that tried to visit
672 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
673 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
674 Glazunov from Google's Project Zero.
676 o Minor features (compatibility, backport from 0.4.6.4-rc):
677 - Remove an assertion function related to TLS renegotiation. It was
678 used nowhere outside the unit tests, and it was breaking
679 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
682 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
683 - Regenerate the list of fallback directories to contain a new set
684 of 200 relays. Closes ticket 40265.
686 o Minor features (geoip data):
687 - Update the geoip files to match the IPFire Location Database, as
688 retrieved on 2021/06/10.
690 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
691 - Fix a non-fatal BUG() message due to a too-early free of a string,
692 when listing a client connection from the DoS defenses subsystem.
693 Fixes bug 40345; bugfix on 0.4.3.4-rc.
695 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
696 - Fix an indentation problem that led to a warning from GCC 11.1.1.
697 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
700 Changes in version 0.3.5.15 - 2021-06-14
701 Tor 0.3.5.15 fixes several security issues, including a
702 denial-of-service attack against onion service clients, and another
703 denial-of-service attack against relays. Everybody should upgrade to
704 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
706 o Major bugfixes (security, backport from 0.4.6.5):
707 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
708 half-closed streams. Previously, clients failed to validate which
709 hop sent these cells: this would allow a relay on a circuit to end
710 a stream that wasn't actually built with it. Fixes bug 40389;
711 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
712 003 and CVE-2021-34548.
714 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
715 - Detect more failure conditions from the OpenSSL RNG code.
716 Previously, we would detect errors from a missing RNG
717 implementation, but not failures from the RNG code itself.
718 Fortunately, it appears those failures do not happen in practice
719 when Tor is using OpenSSL's default RNG implementation. Fixes bug
720 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
721 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
723 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
724 - Resist a hashtable-based CPU denial-of-service attack against
725 relays. Previously we used a naive unkeyed hash function to look
726 up circuits in a circuitmux object. An attacker could exploit this
727 to construct circuits with chosen circuit IDs, to create
728 collisions and make the hash table inefficient. Now we use a
729 SipHash construction here instead. Fixes bug 40391; bugfix on
730 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
731 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
732 - Fix an out-of-bounds memory access in v3 onion service descriptor
733 parsing. An attacker could exploit this bug by crafting an onion
734 service descriptor that would crash any client that tried to visit
735 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
736 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
737 Glazunov from Google's Project Zero.
739 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
740 - Fix an indentation problem that led to a warning from GCC 11.1.1.
741 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
743 o Minor features (compatibility, backport from 0.4.6.4-rc):
744 - Remove an assertion function related to TLS renegotiation. It was
745 used nowhere outside the unit tests, and it was breaking
746 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
749 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
750 - Regenerate the list of fallback directories to contain a new set
751 of 200 relays. Closes ticket 40265.
753 o Minor features (geoip data):
754 - Update the geoip files to match the IPFire Location Database, as
755 retrieved on 2021/06/10.
758 Changes in version 0.4.6.5 - 2021-06-14
759 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
760 series includes numerous features and bugfixes, including a significant
761 improvement to our circuit timeout algorithm that should improve
762 observed client performance, and a way for relays to report when they are
765 This release also includes security fixes for several security issues,
766 including a denial-of-service attack against onion service clients,
767 and another denial-of-service attack against relays. Everybody should
768 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
770 Below are the changes since 0.4.6.4-rc. For a complete list of changes
771 since 0.4.5.8, see the ReleaseNotes file.
773 o Major bugfixes (security):
774 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
775 half-closed streams. Previously, clients failed to validate which
776 hop sent these cells: this would allow a relay on a circuit to end
777 a stream that wasn't actually built with it. Fixes bug 40389;
778 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
779 003 and CVE-2021-34548.
781 o Major bugfixes (security, defense-in-depth):
782 - Detect more failure conditions from the OpenSSL RNG code.
783 Previously, we would detect errors from a missing RNG
784 implementation, but not failures from the RNG code itself.
785 Fortunately, it appears those failures do not happen in practice
786 when Tor is using OpenSSL's default RNG implementation. Fixes bug
787 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
788 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
790 o Major bugfixes (security, denial of service):
791 - Resist a hashtable-based CPU denial-of-service attack against
792 relays. Previously we used a naive unkeyed hash function to look
793 up circuits in a circuitmux object. An attacker could exploit this
794 to construct circuits with chosen circuit IDs, to create
795 collisions and make the hash table inefficient. Now we use a
796 SipHash construction here instead. Fixes bug 40391; bugfix on
797 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
798 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
799 - Fix an out-of-bounds memory access in v3 onion service descriptor
800 parsing. An attacker could exploit this bug by crafting an onion
801 service descriptor that would crash any client that tried to visit
802 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
803 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
804 Glazunov from Google's Project Zero.
806 o Minor features (geoip data):
807 - Update the geoip files to match the IPFire Location Database, as
808 retrieved on 2021/06/10.
810 o Minor features (logging, diagnostic):
811 - Log decompression failures at a higher severity level, since they
812 can help provide missing context for other warning messages. We
813 rate-limit these messages, to avoid flooding the logs if they
814 begin to occur frequently. Closes ticket 40175.
817 Changes in version 0.4.6.4-rc - 2021-05-28
818 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
819 the final release candidate in its series: unless major new issues are
820 found, the next release will be stable.
822 o Minor features (compatibility):
823 - Remove an assertion function related to TLS renegotiation. It was
824 used nowhere outside the unit tests, and it was breaking
825 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
828 o Minor bugfixes (consensus handling):
829 - Avoid a set of bugs that could be caused by inconsistently
830 preferring an out-of-date consensus stored in a stale directory
831 cache over a more recent one stored on disk as the latest
832 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
834 o Minor bugfixes (control, sandbox):
835 - Allow the control command SAVECONF to succeed when the seccomp
836 sandbox is enabled, and make SAVECONF keep only one backup file to
837 simplify implementation. Previously SAVECONF allowed a large
838 number of backup files, which made it incompatible with the
839 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
842 o Minor bugfixes (metrics port):
843 - Fix a bug that made tor try to re-bind() on an already open
844 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
848 - Remove unneeded code for parsing private keys in directory
849 documents. This code was only used for client authentication in v2
850 onion services, which are now unsupported. Closes ticket 40374.
853 Changes in version 0.4.5.8 - 2021-05-10
854 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
855 from the 0.4.6.x series.
857 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
858 - Add a workaround to enable the Linux sandbox to work correctly
859 with Glibc 2.33. This version of Glibc has started using the
860 fstatat() system call, which previously our sandbox did not allow.
861 Closes ticket 40382; see the ticket for a discussion of trade-offs.
863 o Minor features (compilation, backport from 0.4.6.3-rc):
864 - Make the autoconf script build correctly with autoconf versions
865 2.70 and later. Closes part of ticket 40335.
867 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
868 - Regenerate the list of fallback directories to contain a new set
869 of 200 relays. Closes ticket 40265.
871 o Minor features (geoip data):
872 - Update the geoip files to match the IPFire Location Database, as
873 retrieved on 2021/05/07.
875 o Minor features (onion services):
876 - Add warning message when connecting to now deprecated v2 onion
877 services. As announced, Tor 0.4.5.x is the last series that will
878 support v2 onions. Closes ticket 40373.
880 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
881 - Fix a regression that made it impossible start Tor using a bridge
882 line with a transport name and no fingerprint. Fixes bug 40360;
883 bugfix on 0.4.5.4-rc.
885 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
886 - Allow a custom "ar" for cross-compilation. Our previous build
887 script had used the $AR environment variable in most places, but
888 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
890 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
891 - Fix a non-fatal BUG() message due to a too-early free of a string,
892 when listing a client connection from the DoS defenses subsystem.
893 Fixes bug 40345; bugfix on 0.4.3.4-rc.
895 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
896 - Fix an indentation problem that led to a warning from GCC 11.1.1.
897 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
899 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
900 - Fix a "BUG" warning that would appear when a controller chooses
901 the first hop for a circuit, and that circuit completes. Fixes bug
902 40285; bugfix on 0.3.2.1-alpha.
904 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
905 - Fix a bug where an expired cached descriptor could get overwritten
906 with a new one without freeing it, leading to a memory leak. Fixes
907 bug 40356; bugfix on 0.3.5.1-alpha.
909 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
910 - Fix pattern-matching errors when patterns expand to invalid paths
911 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
915 Changes in version 0.4.6.3-rc - 2021-05-10
916 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
917 a few small bugs from previous versions, and adds a better error
918 message when trying to use (no longer supported) v2 onion services.
920 Though we anticipate that we'll be doing a bit more clean-up between
921 now and the stable release, we expect that our remaining changes will
922 be fairly simple. There will likely be at least one more release
923 candidate before 0.4.6.x is stable.
925 o Major bugfixes (onion service, control port):
926 - Make the ADD_ONION command properly configure client authorization.
927 Before this fix, the created onion failed to add the client(s).
928 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
930 o Minor features (compatibility, Linux seccomp sandbox):
931 - Add a workaround to enable the Linux sandbox to work correctly
932 with Glibc 2.33. This version of Glibc has started using the
933 fstatat() system call, which previously our sandbox did not allow.
934 Closes ticket 40382; see the ticket for a discussion of trade-offs.
936 o Minor features (compilation):
937 - Make the autoconf script build correctly with autoconf versions
938 2.70 and later. Closes part of ticket 40335.
940 o Minor features (geoip data):
941 - Update the geoip files to match the IPFire Location Database, as
942 retrieved on 2021/05/07.
944 o Minor features (onion services):
945 - Add a warning message when trying to connect to (no longer
946 supported) v2 onion services. Closes ticket 40373.
948 o Minor bugfixes (build, cross-compilation):
949 - Allow a custom "ar" for cross-compilation. Our previous build
950 script had used the $AR environment variable in most places, but
951 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
953 o Minor bugfixes (compiler warnings):
954 - Fix an indentation problem that led to a warning from GCC 11.1.1.
955 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
957 o Minor bugfixes (logging, relay):
958 - Emit a warning if an Address is found to be internal and tor can't
959 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
961 o Minor bugfixes (onion service, client, memory leak):
962 - Fix a bug where an expired cached descriptor could get overwritten
963 with a new one without freeing it, leading to a memory leak. Fixes
964 bug 40356; bugfix on 0.3.5.1-alpha.
967 Changes in version 0.4.6.2-alpha - 2021-04-15
968 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
969 small bugs in previous releases, and solves other issues that had
970 enabled denial-of-service attacks and affected integration with
973 o Minor features (client):
974 - Clients now check whether their streams are attempting to re-enter
975 the Tor network (i.e. to send Tor traffic over Tor), and close
976 them preemptively if they think exit relays will refuse them for
977 this reason. See ticket 2667 for details. Closes ticket 40271.
979 o Minor features (command line):
980 - Add long format name "--torrc-file" equivalent to the existing
981 command-line option "-f". Closes ticket 40324. Patch by
984 o Minor features (dormant mode):
985 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
986 control over whether the client ever becomes dormant from
987 inactivity. Most people won't need this. Closes ticket 40228.
989 o Minor features (fallback directory list):
990 - Regenerate the list of fallback directories to contain a new set
991 of 200 relays. Closes ticket 40265.
993 o Minor features (geoip data):
994 - Update the geoip files to match the IPFire Location Database, as
995 retrieved on 2021/04/13.
997 o Minor features (logging):
998 - Edit heartbeat log messages so that more of them begin with the
999 string "Heartbeat: ". Closes ticket 40322; patch
1002 o Minor bugfixes (bridge, pluggable transport):
1003 - Fix a regression that made it impossible start Tor using a bridge
1004 line with a transport name and no fingerprint. Fixes bug 40360;
1005 bugfix on 0.4.5.4-rc.
1007 o Minor bugfixes (channel, DoS):
1008 - Fix a non-fatal BUG() message due to a too-early free of a string,
1009 when listing a client connection from the DoS defenses subsystem.
1010 Fixes bug 40345; bugfix on 0.4.3.4-rc.
1012 o Minor bugfixes (compilation):
1013 - Fix a compilation warning about unused functions when building
1014 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
1015 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
1017 o Minor bugfixes (configuration):
1018 - Fix pattern-matching for directories on all platforms when using
1019 %include options in configuration files. This patch also fixes
1020 compilation on musl libc based systems. Fixes bug 40141; bugfix
1023 o Minor bugfixes (relay):
1024 - Move the "overload-general" line from extrainfo to the server
1025 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
1027 o Minor bugfixes (testing, BSD):
1028 - Fix pattern-matching errors when patterns expand to invalid paths
1029 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
1032 o Documentation (manual):
1033 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
1035 - Indicate that the HiddenServiceStatistics option also applies to
1036 bridges. Closes ticket 40346.
1037 - Move the description of BridgeRecordUsageByCountry to the section
1038 "STATISTICS OPTIONS". Closes ticket 40323.
1041 Changes in version 0.4.6.1-alpha - 2021-03-18
1042 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
1043 improves client circuit performance, adds missing features, and
1044 improves some of our DoS handling and statistics reporting. It also
1045 includes numerous smaller bugfixes.
1047 Below are the changes since 0.4.5.7. (Note that this release DOES
1048 include the fixes for the security bugs already fixed in 0.4.5.7.)
1050 o Major features (control port, onion services):
1051 - Add controller support for creating version 3 onion services with
1052 client authorization. Previously, only v2 onion services could be
1053 created with client authorization. Closes ticket 40084. Patch by
1056 o Major features (directory authority):
1057 - When voting on a relay with a Sybil-like appearance, add the Sybil
1058 flag when clearing out the other flags. This lets a relay operator
1059 know why their relay hasn't been included in the consensus. Closes
1060 ticket 40255. Patch by Neel Chauhan.
1062 o Major features (metrics):
1063 - Relays now report how overloaded they are in their extrainfo
1064 documents. This information is controlled with the
1065 OverloadStatistics torrc option, and it will be used to improve
1066 decisions about the network's load balancing. Implements proposal
1067 328; closes ticket 40222.
1069 o Major features (relay, denial of service):
1070 - Add a new DoS subsystem feature to control the rate of client
1071 connections for relays. Closes ticket 40253.
1073 o Major features (statistics):
1074 - Relays now publish statistics about the number of v3 onion
1075 services and volume of v3 onion service traffic, in the same
1076 manner they already do for v2 onions. Closes ticket 23126.
1078 o Major bugfixes (circuit build timeout):
1079 - Improve the accuracy of our circuit build timeout calculation for
1080 60%, 70%, and 80% build rates for various guard choices. We now
1081 use a maximum likelihood estimator for Pareto parameters of the
1082 circuit build time distribution, instead of a "right-censored
1083 estimator". This causes clients to ignore circuits that never
1084 finish building in their timeout calculations. Previously, clients
1085 were counting such unfinished circuits as having the highest
1086 possible build time value, when in reality these circuits most
1087 likely just contain relays that are offline. We also now wait a
1088 bit longer to let circuits complete for measurement purposes,
1089 lower the minimum possible effective timeout from 1.5 seconds to
1090 10ms, and increase the resolution of the circuit build time
1091 histogram from 50ms bin widths to 10ms bin widths. Additionally,
1092 we alter our estimate Xm by taking the maximum of the top 10 most
1093 common build time values of the 10ms histogram, and compute Xm as
1094 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
1095 - Remove max_time calculation and associated warning from circuit
1096 build timeout 'alpha' parameter estimation, as this is no longer
1097 needed by our new estimator from 40168. Fixes bug 34088; bugfix
1100 o Major bugfixes (signing key):
1101 - In the tor-gencert utility, give an informative error message if
1102 the passphrase given in `--create-identity-key` is too short.
1103 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
1105 o Minor features (bridge):
1106 - We now announce the URL to Tor's new bridge status at
1107 https://bridges.torproject.org/ when Tor is configured to run as a
1108 bridge relay. Closes ticket 30477.
1110 o Minor features (build system):
1111 - New "make lsp" command to auto generate the compile_commands.json
1112 file used by the ccls server. The "bear" program is needed for
1113 this. Closes ticket 40227.
1115 o Minor features (command-line interface):
1116 - Add build informations to `tor --version` in order to ease
1117 reproducible builds. Closes ticket 32102.
1118 - When parsing command-line flags that take an optional argument,
1119 treat the argument as absent if it would start with a '-'
1120 character. Arguments in that form are not intelligible for any of
1121 our optional-argument flags. Closes ticket 40223.
1122 - Allow a relay operator to list the ed25519 keys on the command
1123 line by adding the `rsa` and `ed25519` arguments to the
1124 --list-fingerprint flag to show the respective RSA and ed25519
1125 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
1127 o Minor features (control port, stream handling):
1128 - Add the stream ID to the event line in the ADDRMAP control event.
1129 Closes ticket 40249. Patch by Neel Chauhan.
1131 o Minor features (dormant mode):
1132 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
1133 control over whether the client can become dormant from
1134 inactivity. Most people won't need this. Closes ticket 40228.
1136 o Minor features (logging):
1137 - Change the DoS subsystem heartbeat line format to be more clear on
1138 what has been detected/rejected, and which option is disabled (if
1139 any). Closes ticket 40308.
1140 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
1141 put brackets around IPv6 addresses in log messages. Closes ticket
1142 40232. Patch by Neel Chauhan.
1144 o Minor features (performance, windows):
1145 - Use SRWLocks to implement locking on Windows. Replaces the
1146 "critical section" locking implementation with the faster
1147 SRWLocks, available since Windows Vista. Closes ticket 17927.
1148 Patch by Daniel Pinto.
1150 o Minor features (protocol, proxy support, defense in depth):
1151 - Close HAProxy connections if they somehow manage to send us data
1152 before we start reading. Closes another case of ticket 40017.
1154 o Minor features (tests, portability):
1155 - Port the hs_build_address.py test script to work with recent
1156 versions of python. Closes ticket 40213. Patch from
1159 o Minor features (vote document):
1160 - Add a "stats" line to directory authority votes, to report various
1161 statistics that authorities compute about the relays. This will
1162 help us diagnose the network better. Closes ticket 40314.
1164 o Minor bugfixes (build):
1165 - The configure script now shows whether or not lzma and zstd have
1166 been used, not just if the enable flag was passed in. Fixes bug
1167 40236; bugfix on 0.4.3.1-alpha.
1169 o Minor bugfixes (compatibility):
1170 - Fix a failure in the test cases when running on the "hppa"
1171 architecture, along with a related test that might fail on other
1172 architectures in the future. Fixes bug 40274; bugfix
1175 o Minor bugfixes (controller):
1176 - Fix a "BUG" warning that would appear when a controller chooses
1177 the first hop for a circuit, and that circuit completes. Fixes bug
1178 40285; bugfix on 0.3.2.1-alpha.
1180 o Minor bugfixes (directory authorities, voting):
1181 - Add a new consensus method (31) to support any future changes that
1182 authorities decide to make to the value of bwweightscale or
1183 maxunmeasuredbw. Previously, there was a bug that prevented the
1184 authorities from parsing these consensus parameters correctly under
1185 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
1187 o Minor bugfixes (ipv6):
1188 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
1189 rare configurations might break, but in this case you can disable
1190 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
1191 on 0.4.1.1-alpha. Patch by Neel Chauhan.
1193 o Minor bugfixes (key generation):
1194 - Do not require a valid torrc when using the `--keygen` argument to
1195 generate a signing key. This allows us to generate keys on systems
1196 or users which may not run Tor. Fixes bug 40235; bugfix on
1197 0.2.7.2-alpha. Patch by Neel Chauhan.
1199 o Minor bugfixes (onion services, logging):
1200 - Downgrade the severity of a few rendezvous circuit-related
1201 warnings from warning to info. Fixes bug 40207; bugfix on
1202 0.3.2.1-alpha. Patch by Neel Chauhan.
1204 o Minor bugfixes (relay):
1205 - Reduce the compression level for data streaming from HIGH to LOW.
1206 This should reduce the CPU and memory burden for directory caches.
1207 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
1209 o Code simplification and refactoring:
1210 - Remove the orconn_ext_or_id_map structure and related functions.
1211 (Nothing outside of unit tests used them.) Closes ticket 33383.
1212 Patch by Neel Chauhan.
1215 - As of this release, Tor no longer supports the old v2 onion
1216 services. They were deprecated last July for security, and support
1217 will be removed entirely later this year. We strongly encourage
1218 everybody to migrate to v3 onion services. For more information,
1219 see https://blog.torproject.org/v2-deprecation-timeline . Closes
1220 ticket 40266. (NOTE: We accidentally released an earlier version
1221 of the 0.4.6.1-alpha changelog without this entry. Sorry for
1224 o Code simplification and refactoring (metrics, DoS):
1225 - Move the DoS subsystem into the subsys manager, including its
1226 configuration options. Closes ticket 40261.
1228 o Removed features (relay):
1229 - Because DirPorts are only used on authorities, relays no longer
1230 advertise them. Similarly, self-testing for DirPorts has been
1231 disabled, since an unreachable DirPort is no reason for a relay
1232 not to advertise itself. (Configuring a DirPort will still work,
1233 for now.) Closes ticket 40282.
1236 Changes in version 0.3.5.14 - 2021-03-16
1237 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
1238 in earlier versions of Tor.
1240 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1241 who can send directory data to a Tor instance to force that Tor
1242 instance to consume huge amounts of CPU. This is easiest to exploit
1243 against authorities, since anybody can upload to them, but directory
1244 caches could also exploit this vulnerability against relays or clients
1245 when they download. The other vulnerability (TROVE-2021-002) only
1246 affects directory authorities, and would allow an attacker to remotely
1247 crash the authority with an assertion failure. Patches have already
1248 been provided to the authority operators, to help ensure
1251 We recommend that everybody upgrade to one of the releases that fixes
1252 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1255 This release also updates our GeoIP data source, and fixes a
1256 compatibility issue.
1258 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1259 - Disable the dump_desc() function that we used to dump unparseable
1260 information to disk. It was called incorrectly in several places,
1261 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1262 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1263 001 and CVE-2021-28089.
1264 - Fix a bug in appending detached signatures to a pending consensus
1265 document that could be used to crash a directory authority. Fixes
1266 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1269 o Minor features (geoip data, backport from 0.4.5.7):
1270 - We have switched geoip data sources. Previously we shipped IP-to-
1271 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1272 their licensing terms, so we were unable to update them after that
1273 point. We now ship geoip files based on the IPFire Location
1274 Database instead. (See https://location.ipfire.org/ for more
1275 information). This release updates our geoip files to match the
1276 IPFire Location Database as retrieved on 2021/03/12. Closes
1279 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1280 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1281 Closes ticket 40309.
1284 Changes in version 0.4.4.8 - 2021-03-16
1285 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
1286 in earlier versions of Tor.
1288 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1289 who can send directory data to a Tor instance to force that Tor
1290 instance to consume huge amounts of CPU. This is easiest to exploit
1291 against authorities, since anybody can upload to them, but directory
1292 caches could also exploit this vulnerability against relays or clients
1293 when they download. The other vulnerability (TROVE-2021-002) only
1294 affects directory authorities, and would allow an attacker to remotely
1295 crash the authority with an assertion failure. Patches have already
1296 been provided to the authority operators, to help ensure
1299 We recommend that everybody upgrade to one of the releases that fixes
1300 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1303 This release also updates our GeoIP data source, and fixes a
1304 compatibility issue.
1306 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
1307 - Disable the dump_desc() function that we used to dump unparseable
1308 information to disk. It was called incorrectly in several places,
1309 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1310 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1311 001 and CVE-2021-28089.
1312 - Fix a bug in appending detached signatures to a pending consensus
1313 document that could be used to crash a directory authority. Fixes
1314 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1317 o Minor features (geoip data, backport from 0.4.5.7):
1318 - We have switched geoip data sources. Previously we shipped IP-to-
1319 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1320 their licensing terms, so we were unable to update them after that
1321 point. We now ship geoip files based on the IPFire Location
1322 Database instead. (See https://location.ipfire.org/ for more
1323 information). This release updates our geoip files to match the
1324 IPFire Location Database as retrieved on 2021/03/12. Closes
1327 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
1328 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1329 Closes ticket 40309.
1332 Changes in version 0.4.5.7 - 2021-03-16
1333 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1336 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1337 who can send directory data to a Tor instance to force that Tor
1338 instance to consume huge amounts of CPU. This is easiest to exploit
1339 against authorities, since anybody can upload to them, but directory
1340 caches could also exploit this vulnerability against relays or clients
1341 when they download. The other vulnerability (TROVE-2021-002) only
1342 affects directory authorities, and would allow an attacker to remotely
1343 crash the authority with an assertion failure. Patches have already
1344 been provided to the authority operators, to help ensure
1347 We recommend that everybody upgrade to one of the releases that fixes
1348 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1351 This release also updates our GeoIP data source, and fixes a few
1352 smaller bugs in earlier releases.
1354 o Major bugfixes (security, denial of service):
1355 - Disable the dump_desc() function that we used to dump unparseable
1356 information to disk. It was called incorrectly in several places,
1357 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1358 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1359 001 and CVE-2021-28089.
1360 - Fix a bug in appending detached signatures to a pending consensus
1361 document that could be used to crash a directory authority. Fixes
1362 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1365 o Minor features (geoip data):
1366 - We have switched geoip data sources. Previously we shipped IP-to-
1367 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1368 their licensing terms, so we were unable to update them after that
1369 point. We now ship geoip files based on the IPFire Location
1370 Database instead. (See https://location.ipfire.org/ for more
1371 information). This release updates our geoip files to match the
1372 IPFire Location Database as retrieved on 2021/03/12. Closes
1375 o Minor bugfixes (directory authority):
1376 - Now that exit relays don't allow exit connections to directory
1377 authority DirPorts (to prevent network reentry), disable
1378 authorities' reachability self test on the DirPort. Fixes bug
1379 40287; bugfix on 0.4.5.5-rc.
1381 o Minor bugfixes (documentation):
1382 - Fix a formatting error in the documentation for
1383 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
1385 o Minor bugfixes (Linux, relay):
1386 - Fix a bug in determining total available system memory that would
1387 have been triggered if the format of Linux's /proc/meminfo file
1388 had ever changed to include "MemTotal:" in the middle of a line.
1389 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
1391 o Minor bugfixes (metrics port):
1392 - Fix a BUG() warning on the MetricsPort for an internal missing
1393 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
1395 o Minor bugfixes (onion service):
1396 - Remove a harmless BUG() warning when reloading tor configured with
1397 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
1399 o Minor bugfixes (portability):
1400 - Fix a non-portable usage of "==" with "test" in the configure
1401 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
1403 o Minor bugfixes (relay):
1404 - Remove a spammy log notice falsely claiming that the IPv4/v6
1405 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
1406 - Do not query the address cache early in the boot process when
1407 deciding if a relay needs to fetch early directory information
1408 from an authority. This bug resulted in a relay falsely believing
1409 it didn't have an address and thus triggering an authority fetch
1410 at each boot. Related to our fix for 40300.
1412 o Removed features (mallinfo deprecated):
1413 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1414 Closes ticket 40309.
1417 Changes in version 0.4.5.6 - 2021-02-15
1418 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
1419 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
1420 Karsten is best known for creating the Tor metrics portal and leading
1421 the metrics team, but he was involved in Tor from the early days. For
1422 example, while he was still a student he invented and implemented the
1423 v2 onion service directory design, and he also served as an ambassador
1424 to the many German researchers working in the anonymity field. We
1425 loved him and respected him for his patience, his consistency, and his
1426 welcoming approach to growing our community.
1428 This release series introduces significant improvements in relay IPv6
1429 address discovery, a new "MetricsPort" mechanism for relay operators
1430 to measure performance, LTTng support, build system improvements to
1431 help when using Tor as a static library, and significant bugfixes
1432 related to Windows relay performance. It also includes numerous
1433 smaller features and bugfixes.
1435 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1436 since 0.4.4.7, see the ReleaseNotes file.
1438 o Major bugfixes (IPv6, relay):
1439 - Fix a bug that prevented a relay from publishing its descriptor if
1440 an auto-discovered IPv6 that was found unreachable. Fixes bug
1441 40279; bugfix on 0.4.5.1-alpha.
1443 o Minor features (protocol versions):
1444 - Stop claiming to support the "DirCache=1" subprotocol version.
1445 Technically, we stopped supporting this subprotocol back in
1446 0.4.5.1-alpha, but we needed to wait for the authorities to stop
1447 listing it as "required" before we could drop it from the list.
1448 Closes ticket 40221.
1450 o Minor bugfixes (logging):
1451 - Avoid a spurious log message about missing subprotocol versions,
1452 when the consensus that we're reading from is older than the
1453 current release. Previously we had made this message nonfatal, but
1454 in practice, it is never relevant when the consensus is older than
1455 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
1457 o Minor bugfixes (metrics port):
1458 - Fix a bug warning when a metrics port socket was unexpectedly
1459 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
1461 o Minor bugfixes (relay):
1462 - Allow relays to have a RFC1918 address if PublishServerDescriptor
1463 is set to 0 and AssumeReachable is set to 1. This is to support
1464 the use case of a bridge on a local network, exposed via a
1465 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
1467 o Minor bugfixes (relay, config):
1468 - Fix a problem in the removal of duplicate ORPorts from the
1469 internal port list when loading the config file. We were removing
1470 the wrong ports, breaking valid torrc uses cases for multiple
1471 ORPorts of the same address family. Fixes bug 40289; bugfix
1475 Changes in version 0.4.4.7 - 2021-02-03
1476 Tor 0.4.4.7 backports numerous bugfixes from later releases,
1477 including one that made v3 onion services more susceptible to
1478 denial-of-service attacks, and a feature that makes some kinds of
1479 DoS attacks harder to perform.
1481 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1482 - Stop requiring a live consensus for v3 clients and services, and
1483 allow a "reasonably live" consensus instead. This allows v3 onion
1484 services to work even if the authorities fail to generate a
1485 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1488 o Major feature (exit, backport from 0.4.5.5-rc):
1489 - Re-entry into the network is now denied at the Exit level to all
1490 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1491 should help mitgate a set of denial-of-service attacks. Closes
1494 o Minor feature (build system, backport from 0.4.5.4-rc):
1495 - New "make lsp" command to generate the compile_commands.json file
1496 used by the ccls language server. The "bear" program is needed for
1497 this. Closes ticket 40227.
1499 o Minor features (compilation, backport from 0.4.5.2-rc):
1500 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1501 later. There are a number of APIs newly deprecated in OpenSSL
1502 3.0.0 that Tor still requires. (A later version of Tor will try to
1503 stop depending on these APIs.) Closes ticket 40165.
1505 o Minor features (crypto, backport from 0.4.5.3-rc):
1506 - Fix undefined behavior on our Keccak library. The bug only
1507 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1508 and would result in wrong digests. Fixes bug 40210; bugfix on
1509 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1510 weasel for diagnosing this.
1512 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1513 - Strip '\r' characters when reading text files on Unix platforms.
1514 This should resolve an issue where a relay operator migrates a
1515 relay from Windows to Unix, but does not change the line ending of
1516 Tor's various state files to match the platform, and the CRLF line
1517 endings from Windows end up leaking into other files such as the
1518 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1520 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1521 - Fix a compilation warning about unreachable fallthrough
1522 annotations when building with "--enable-all-bugs-are-fatal" on
1523 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1525 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1526 - Handle partial SOCKS5 messages correctly. Previously, our code
1527 would send an incorrect error message if it got a SOCKS5 request
1528 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1530 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1531 - Fix the `config/parse_tcp_proxy_line` test so that it works
1532 correctly on systems where the DNS provider hijacks invalid
1533 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1534 - Fix our Python reference-implementation for the v3 onion service
1535 handshake so that it works correctly with the version of hashlib
1536 provided by Python 3.9. Fixes part of bug 40179; bugfix
1538 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1539 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1542 Changes in version 0.4.3.8 - 2021-02-03
1543 Tor 0.4.3.8 backports numerous bugfixes from later releases,
1544 including one that made v3 onion services more susceptible to
1545 denial-of-service attacks, and a feature that makes some kinds of
1546 DoS attacks harder to perform.
1548 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
1549 which will reach end-of-life on 15 Feb 2021.
1551 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1552 - Stop requiring a live consensus for v3 clients and services, and
1553 allow a "reasonably live" consensus instead. This allows v3 onion
1554 services to work even if the authorities fail to generate a
1555 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1558 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1559 - Fix a bug where we were undercounting the Tor network's total
1560 onion service traffic, by ignoring any traffic originating from
1561 clients. Now we count traffic from both clients and services.
1562 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1564 o Major feature (exit, backport from 0.4.5.5-rc):
1565 - Re-entry into the network is now denied at the Exit level to all
1566 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1567 should help mitgate a set of denial-of-service attacks. Closes
1570 o Minor feature (build system, backport from 0.4.5.4-rc):
1571 - New "make lsp" command to generate the compile_commands.json file
1572 used by the ccls language server. The "bear" program is needed for
1573 this. Closes ticket 40227.
1575 o Minor features (compilation, backport from 0.4.5.2-rc):
1576 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1577 later. There are a number of APIs newly deprecated in OpenSSL
1578 3.0.0 that Tor still requires. (A later version of Tor will try to
1579 stop depending on these APIs.) Closes ticket 40165.
1581 o Minor features (crypto, backport from 0.4.5.3-rc):
1582 - Fix undefined behavior on our Keccak library. The bug only
1583 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1584 and would result in wrong digests. Fixes bug 40210; bugfix on
1585 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1586 weasel for diagnosing this.
1588 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1589 - Strip '\r' characters when reading text files on Unix platforms.
1590 This should resolve an issue where a relay operator migrates a
1591 relay from Windows to Unix, but does not change the line ending of
1592 Tor's various state files to match the platform, and the CRLF line
1593 endings from Windows end up leaking into other files such as the
1594 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1596 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1597 - Resolve a compilation warning that could occur in
1598 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1600 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1601 - Fix a compilation warning about unreachable fallthrough
1602 annotations when building with "--enable-all-bugs-are-fatal" on
1603 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1605 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1606 - Handle partial SOCKS5 messages correctly. Previously, our code
1607 would send an incorrect error message if it got a SOCKS5 request
1608 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1610 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1611 - Fix the `config/parse_tcp_proxy_line` test so that it works
1612 correctly on systems where the DNS provider hijacks invalid
1613 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1614 - Fix our Python reference-implementation for the v3 onion service
1615 handshake so that it works correctly with the version of hashlib
1616 provided by Python 3.9. Fixes part of bug 40179; bugfix
1618 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1619 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1622 Changes in version 0.3.5.13 - 2020-02-03
1623 Tor 0.3.5.13 backports numerous bugfixes from later releases,
1624 including one that made v3 onion services more susceptible to
1625 denial-of-service attacks, and a feature that makes some kinds of
1626 DoS attacks harder to perform.
1628 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1629 - Stop requiring a live consensus for v3 clients and services, and
1630 allow a "reasonably live" consensus instead. This allows v3 onion
1631 services to work even if the authorities fail to generate a
1632 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1635 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1636 - Fix a bug where we were undercounting the Tor network's total
1637 onion service traffic, by ignoring any traffic originating from
1638 clients. Now we count traffic from both clients and services.
1639 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1641 o Major feature (exit, backport from 0.4.5.5-rc):
1642 - Re-entry into the network is now denied at the Exit level to all
1643 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1644 should help mitgate a set of denial-of-service attacks. Closes
1647 o Minor feature (build system, backport from 0.4.5.4-rc):
1648 - New "make lsp" command to generate the compile_commands.json file
1649 used by the ccls language server. The "bear" program is needed for
1650 this. Closes ticket 40227.
1652 o Minor features (compilation, backport from 0.4.5.2-rc):
1653 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1654 later. There are a number of APIs newly deprecated in OpenSSL
1655 3.0.0 that Tor still requires. (A later version of Tor will try to
1656 stop depending on these APIs.) Closes ticket 40165.
1658 o Minor features (crypto, backport from 0.4.5.3-rc):
1659 - Fix undefined behavior on our Keccak library. The bug only
1660 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1661 and would result in wrong digests. Fixes bug 40210; bugfix on
1662 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1663 weasel for diagnosing this.
1665 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1666 - Strip '\r' characters when reading text files on Unix platforms.
1667 This should resolve an issue where a relay operator migrates a
1668 relay from Windows to Unix, but does not change the line ending of
1669 Tor's various state files to match the platform, and the CRLF line
1670 endings from Windows end up leaking into other files such as the
1671 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1673 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1674 - Resolve a compilation warning that could occur in
1675 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1677 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1678 - Fix a compilation warning about unreachable fallthrough
1679 annotations when building with "--enable-all-bugs-are-fatal" on
1680 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1682 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1683 - Handle partial SOCKS5 messages correctly. Previously, our code
1684 would send an incorrect error message if it got a SOCKS5 request
1685 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1687 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1688 - Fix our Python reference-implementation for the v3 onion service
1689 handshake so that it works correctly with the version of hashlib
1690 provided by Python 3.9. Fixes part of bug 40179; bugfix
1692 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1693 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1696 Changes in version 0.4.5.5-rc - 2021-02-01
1697 Tor 0.4.5.5-rc is the third release candidate in its series. We're
1698 coming closer and closer to a stable release series. This release
1699 fixes an annoyance with address detection code, and somewhat mitigates
1700 an ongoing denial-of-service attack.
1702 We anticipate no more code changes between this and the stable
1703 release, though of course that could change.
1705 o Major feature (exit):
1706 - Re-entry into the network is now denied at the Exit level to all
1707 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1708 should help mitgate a set of denial-of-service attacks. Closes
1711 o Minor bugfixes (relay, configuration):
1712 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
1713 for it can be found in the configuration. Fixes bug 40254; bugfix
1717 Changes in version 0.4.5.4-rc - 2021-01-22
1718 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
1719 several bugs present in previous releases.
1721 We expect that the stable release will be the same, or almost the
1722 same, as this release candidate, unless serious bugs are found.
1724 o Major bugfixes (authority, IPv6):
1725 - Do not consider multiple relays in the same IPv6 /64 network to be
1726 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
1728 o Major bugfixes (directory cache, performance, windows):
1729 - Limit the number of items in the consensus diff cache to 64 on
1730 Windows. We hope this will mitigate an issue where Windows relay
1731 operators reported Tor using 100% CPU, while we investigate better
1732 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
1734 o Minor feature (build system):
1735 - New "make lsp" command to generate the compile_commands.json file
1736 used by the ccls language server. The "bear" program is needed for
1737 this. Closes ticket 40227.
1739 o Minor features (authority, logging):
1740 - Log more information for directory authority operators during the
1741 consensus voting process, and while processing relay descriptors.
1742 Closes ticket 40245.
1743 - Reject obsolete router/extrainfo descriptors earlier and more
1744 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
1747 o Minor bugfixes (compilation):
1748 - Fix another warning about unreachable fallthrough annotations when
1749 building with "--enable-all-bugs-are-fatal" on some compilers.
1750 Fixes bug 40241; bugfix on 0.4.5.3-rc.
1751 - Change the linker flag ordering in our library search code so that
1752 it works for compilers that need the libraries to be listed in the
1753 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
1755 o Minor bugfixes (config, bridge):
1756 - Don't initiate a connection to a bridge configured to use a
1757 missing transport. This change reverts an earlier fix that would
1758 try to avoid such situations during configuration chcecking, but
1759 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
1762 o Minor bugfixes (onion services):
1763 - Avoid a non-fatal assertion in certain edge-cases when
1764 establishing a circuit to an onion service. Fixes bug 32666;
1765 bugfix on 0.3.0.3-alpha.
1767 o Minor bugfixes (relay):
1768 - If we were unable to build our descriptor, don't mark it as having
1769 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
1770 bugfix on 0.4.5.1-alpha.
1773 Changes in version 0.4.5.3-rc - 2021-01-12
1774 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
1775 several bugs, including one that broke onion services on certain older
1776 ARM CPUs, and another that made v3 onion services less reliable.
1778 Though we anticipate that we'll be doing a bit more clean-up between
1779 now and the stable release, we expect that our remaining changes will
1780 be fairly simple. There will be at least one more release candidate
1781 before 0.4.5.x is stable.
1783 o Major bugfixes (onion service v3):
1784 - Stop requiring a live consensus for v3 clients and services, and
1785 allow a "reasonably live" consensus instead. This allows v3 onion
1786 services to work even if the authorities fail to generate a
1787 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1790 o Minor features (crypto):
1791 - Fix undefined behavior on our Keccak library. The bug only
1792 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1793 and would result in wrong digests. Fixes bug 40210; bugfix on
1794 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1795 weasel for diagnosing this.
1797 o Minor features (documentation):
1798 - Mention the "!badexit" directive that can appear in an authority's
1799 approved-routers file, and update the description of the
1800 "!invalid" directive. Closes ticket 40188.
1802 o Minor bugfixes (compilation):
1803 - Fix a compilation warning about unreachable fallthrough
1804 annotations when building with "--enable-all-bugs-are-fatal" on
1805 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1806 - Fix the "--enable-static-tor" switch to properly set the "-static"
1807 compile option onto the tor binary only. Fixes bug 40111; bugfix
1810 o Minor bugfixes (config, bridge):
1811 - Really fix the case where torrc has a missing ClientTransportPlugin
1812 but is configured with a Bridge line and UseBridges. Previously,
1813 we didn't look at the managed proxy list and thus would fail for
1814 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
1816 o Minor bugfixes (logging, relay):
1817 - Log our address as reported by the directory authorities, if none
1818 was configured or detected before. Fixes bug 40201; bugfix
1820 - When a launching bandwidth testing circuit, don't incorrectly call
1821 it a reachability test, or trigger a "CHECKING_REACHABILITY"
1822 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
1824 o Minor bugfixes (relay, statistics):
1825 - Report the correct connection statistics in our extrainfo
1826 documents. Previously there was a problem in the file loading
1827 function which would wrongly truncate a state file, causing the
1828 wrong information to be reported. Fixes bug 40226; bugfix
1831 o Minor bugfixes (SOCKS5):
1832 - Handle partial SOCKS5 messages correctly. Previously, our code
1833 would send an incorrect error message if it got a SOCKS5 request
1834 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1837 Changes in version 0.4.5.2-alpha - 2020-11-23
1838 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
1839 It fixes several bugs present in earlier releases, including one that
1840 made it impractical to run relays on Windows. It also adds a few small
1841 safety features to improve Tor's behavior in the presence of strange
1842 compile-time options, misbehaving proxies, and future versions
1845 o Major bugfixes (relay, windows):
1846 - Fix a bug in our implementation of condition variables on Windows.
1847 Previously, a relay on Windows would use 100% CPU after running
1848 for some time. Because of this change, Tor now require Windows
1849 Vista or later to build and run. Fixes bug 30187; bugfix on
1850 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
1851 the introduction of consensus diffs.) Patch by Daniel Pinto.
1853 o Minor features (compilation):
1854 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1855 later. There are a number of APIs newly deprecated in OpenSSL
1856 3.0.0 that Tor still requires. (A later version of Tor will try to
1857 stop depending on these APIs.) Closes ticket 40165.
1859 o Minor features (protocol, proxy support, defense in depth):
1860 - Respond more deliberately to misbehaving proxies that leave
1861 leftover data on their connections, so as to make Tor even less
1862 likely to allow the proxies to pass their data off as having come
1863 from a relay. Closes ticket 40017.
1865 o Minor features (safety):
1866 - Log a warning at startup if Tor is built with compile-time options
1867 that are likely to make it less stable or reliable. Closes
1870 o Minor bugfixes (circuit, handshake):
1871 - In the v3 handshaking code, use connection_or_change_state() to
1872 change the state. Previously, we changed the state directly, but
1873 this did not pass the state change to the pubsub or channel
1874 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
1875 0.2.3.6-alpha. Patch by Neel Chauhan.
1877 o Minor bugfixes (compilation):
1878 - Use the correct 'ranlib' program when building libtor.a.
1879 Previously we used the default ranlib, which broke some kinds of
1880 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
1881 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
1882 bugfix on 0.4.5.1-alpha.
1883 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
1884 attempt to build. Linux supports that macro but not the BSDs.
1885 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
1887 o Minor bugfixes (configuration):
1888 - Exit Tor on a misconfiguration when the Bridge line is configured
1889 to use a transport but no corresponding ClientTransportPlugin can
1890 be found. Prior to this fix, Tor would attempt to connect to the
1891 bridge directly without using the transport, making it easier for
1892 adversaries to notice the bridge. Fixes bug 25528; bugfix
1894 - Fix an issue where an ORPort was compared with other kinds of
1895 ports, when it should have been only checked against other
1896 ORPorts. This bug would lead to "DirPort auto" getting ignored.
1897 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
1898 - Fix a bug where a second non-ORPort with a variant family (ex:
1899 SocksPort [::1]:9050) would be ignored due to a configuration
1900 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
1902 o Minor bugfixes (crash, relay, signing key):
1903 - Avoid assertion failures when we run Tor from the command line
1904 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
1905 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
1907 o Minor bugfixes (logging):
1908 - Remove trailing whitespace from control event log messages. Fixes
1909 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
1911 - Turn warning-level log message about SENDME failure into a debug-
1912 level message. (This event can happen naturally, and is no reason
1913 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
1915 o Minor bugfixes (relay, address discovery):
1916 - Don't trigger an IP change when no new valid IP can be found.
1917 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
1918 - When attempting to discover our IP, use a simple test circuit,
1919 rather than a descriptor fetch: the same address information is
1920 present in NETINFO cells, and is better authenticated there. Fixes
1921 bug 40071; bugfix on 0.4.5.1-alpha.
1923 o Minor bugfixes (testing):
1924 - Fix the `config/parse_tcp_proxy_line` test so that it works
1925 correctly on systems where the DNS provider hijacks invalid
1926 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1927 - Fix unit tests that used newly generated list of routers so that
1928 they check them with respect to the date when they were generated,
1929 not with respect to the current time. Fixes bug 40187; bugfix
1931 - Fix our Python reference-implementation for the v3 onion service
1932 handshake so that it works correctly with the version of hashlib
1933 provided by Python 3.9. Fixes part of bug 40179; bugfix
1935 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1936 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1938 o Removed features (controller):
1939 - Remove the "GETINFO network-status" controller command. It has
1940 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
1943 Changes in version 0.4.4.6 - 2020-11-12
1944 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
1945 backports fixes from later releases, including a fix for TROVE-2020-
1946 005, a security issue that could be used, under certain cases, by an
1947 adversary to observe traffic patterns on a limited number of circuits
1948 intended for a different relay.
1950 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1951 - When completing a channel, relays now check more thoroughly to
1952 make sure that it matches any pending circuits before attaching
1953 those circuits. Previously, address correctness and Ed25519
1954 identities were not checked in this case, but only when extending
1955 circuits on an existing channel. Fixes bug 40080; bugfix on
1956 0.2.7.2-alpha. Resolves TROVE-2020-005.
1958 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
1959 - Authorities now list a different set of protocols as required and
1960 recommended. These lists have been chosen so that only truly
1961 recommended and/or required protocols are included, and so that
1962 clients using 0.2.9 or later will continue to work (even though
1963 they are not supported), whereas only relays running 0.3.5 or
1964 later will meet the requirements. Closes ticket 40162.
1965 - Make it possible to specify multiple ConsensusParams torrc lines.
1966 Now directory authority operators can for example put the main
1967 ConsensusParams config in one torrc file and then add to it from a
1968 different torrc file. Closes ticket 40164.
1970 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1971 - Tor no longer allows subprotocol versions larger than 63.
1972 Previously version numbers up to UINT32_MAX were allowed, which
1973 significantly complicated our code. Implements proposal 318;
1974 closes ticket 40133.
1976 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1977 - Fix a rendezvous cache unit test that was triggering an underflow
1978 on the global rend cache allocation. Fixes bug 40125; bugfix
1980 - Fix another rendezvous cache unit test that was triggering an
1981 underflow on the global rend cache allocation. Fixes bug 40126;
1982 bugfix on 0.2.8.1-alpha.
1984 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
1985 - Fix compiler warnings that would occur when building with
1986 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1987 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1988 - Resolve a compilation warning that could occur in
1989 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1991 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1992 - Remove a debug logging statement that uselessly spammed the logs.
1993 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1995 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1996 - Avoid a fatal assert() when failing to create a listener
1997 connection for an address that was in use. Fixes bug 40073; bugfix
2000 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2001 - For HSFETCH commands on v2 onion services addresses, check the
2002 length of bytes decoded, not the base32 length. Fixes bug 34400;
2003 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2006 Changes in version 0.4.3.7 - 2020-11-12
2007 Tor 0.4.3.7 backports several bugfixes from later releases. It
2008 includes a fix for TROVE-2020-005, a security issue that could be
2009 used, under certain cases, by an adversary to observe traffic patterns
2010 on a limited number of circuits intended for a different relay.
2012 Please be aware that support for the 0.4.3.x series will end on 15
2013 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
2014 downgrade to 0.3.5.x, which will be supported until at least 1
2017 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2018 - Replace the 148 fallback directories originally included in Tor
2019 0.4.1.4-rc (of which around 105 are still functional) with a list
2020 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2022 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2023 - When completing a channel, relays now check more thoroughly to
2024 make sure that it matches any pending circuits before attaching
2025 those circuits. Previously, address correctness and Ed25519
2026 identities were not checked in this case, but only when extending
2027 circuits on an existing channel. Fixes bug 40080; bugfix on
2028 0.2.7.2-alpha. Resolves TROVE-2020-005.
2030 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2031 - When running with NSS enabled, make sure that NSS knows to expect
2032 nonblocking sockets. Previously, we set our TCP sockets as
2033 nonblocking, but did not tell NSS, which in turn could lead to
2034 unexpected blocking behavior. Fixes bug 40035; bugfix
2037 o Minor features (security, backport from 0.4.4.4-rc):
2038 - Channels using obsolete versions of the Tor link protocol are no
2039 longer allowed to circumvent address-canonicity checks. (This is
2040 only a minor issue, since such channels have no way to set ed25519
2041 keys, and therefore should always be rejected for circuits that
2042 specify ed25519 identities.) Closes ticket 40081.
2044 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2045 - Tor no longer allows subprotocol versions larger than 63.
2046 Previously version numbers up to UINT32_MAX were allowed, which
2047 significantly complicated our code. Implements proposal 318;
2048 closes ticket 40133.
2050 o Minor features (tests, backport from 0.4.4.5):
2051 - Our "make check" target now runs the unit tests in 8 parallel
2052 chunks. Doing this speeds up hardened CI builds by more than a
2053 factor of two. Closes ticket 40098.
2055 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2056 - Fix a rendezvous cache unit test that was triggering an underflow
2057 on the global rend cache allocation. Fixes bug 40125; bugfix
2059 - Fix another rendezvous cache unit test that was triggering an
2060 underflow on the global rend cache allocation. Fixes bug 40126;
2061 bugfix on 0.2.8.1-alpha.
2063 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2064 - Fix a correctness bug that could cause an assertion failure if we
2065 ever tried using the buf_move_all() function with an empty input
2066 buffer. As far as we know, no released versions of Tor do this.
2067 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2069 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2070 - Remove a debug logging statement that uselessly spammed the logs.
2071 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2073 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2074 - On a bridge, treat all connections from an ExtORPort as remote by
2075 default for the purposes of rate-limiting. Previously, bridges
2076 would treat the connection as local unless they explicitly
2077 received a "USERADDR" command. ExtORPort connections still count
2078 as local if there is a USERADDR command with an explicit local
2079 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2081 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2082 - Avoid a fatal assert() when failing to create a listener
2083 connection for an address that was in use. Fixes bug 40073; bugfix
2086 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2087 - Adjust the rules for when to warn about having too many
2088 connections to other relays. Previously we'd tolerate up to 1.5
2089 connections per relay on average. Now we tolerate more connections
2090 for directory authorities, and raise the number of total
2091 connections we need to see before we warn. Fixes bug 33880; bugfix
2094 o Minor bugfixes (tests, 0.4.4.5):
2095 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2096 on its own. Previously, it would exit with an error. Fixes bug
2097 40099; bugfix on 0.2.8.1-alpha.
2099 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
2100 - For HSFETCH commands on v2 onion services addresses, check the
2101 length of bytes decoded, not the base32 length. Fixes bug 34400;
2102 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2104 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2105 - Fix a bug that prevented Tor from starting if its log file grew
2106 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2108 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2109 - Add a deprecation warning for version 2 onion services. Closes
2112 o Removed features (backport from 0.4.4.3-alpha):
2113 - Our "check-local" test target no longer tries to use the
2114 Coccinelle semantic patching tool parse all the C files. While it
2115 is a good idea to try to make sure Coccinelle works on our C
2116 before we run a Coccinelle patch, doing so on every test run has
2117 proven to be disruptive. You can still run this tool manually with
2118 "make check-cocci". Closes ticket 40030. ticket 40030.
2121 Changes in version 0.3.5.12 - 2020-11-12
2122 Tor 0.4.3.7 backports several bugfixes from later releases. It
2123 includes a fix for TROVE-2020-005, a security issue that could be
2124 used, under certain cases, by an adversary to observe traffic patterns
2125 on a limited number of circuits intended for a different relay.
2127 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
2128 - Replace the 148 fallback directories originally included in Tor
2129 0.4.1.4-rc (of which around 105 are still functional) with a list
2130 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2132 o Major bugfixes (security, backport from 0.4.5.1-alpha):
2133 - When completing a channel, relays now check more thoroughly to
2134 make sure that it matches any pending circuits before attaching
2135 those circuits. Previously, address correctness and Ed25519
2136 identities were not checked in this case, but only when extending
2137 circuits on an existing channel. Fixes bug 40080; bugfix on
2138 0.2.7.2-alpha. Resolves TROVE-2020-005.
2140 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
2141 - When running with NSS enabled, make sure that NSS knows to expect
2142 nonblocking sockets. Previously, we set our TCP sockets as
2143 nonblocking, but did not tell NSS, which in turn could lead to
2144 unexpected blocking behavior. Fixes bug 40035; bugfix
2147 o Minor features (security, backport from 0.4.4.4-rc):
2148 - Channels using obsolete versions of the Tor link protocol are no
2149 longer allowed to circumvent address-canonicity checks. (This is
2150 only a minor issue, since such channels have no way to set ed25519
2151 keys, and therefore should always be rejected for circuits that
2152 specify ed25519 identities.) Closes ticket 40081.
2154 o Minor features (debugging, directory system):
2155 - Don't crash when we find a non-guard with a guard-fraction value
2156 set. Instead, log a bug warning, in an attempt to figure out how
2157 this happened. Diagnostic for ticket 32868.
2159 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
2160 - Tor no longer allows subprotocol versions larger than 63.
2161 Previously version numbers up to UINT32_MAX were allowed, which
2162 significantly complicated our code. Implements proposal 318;
2163 closes ticket 40133.
2165 o Minor features (tests, backport from 0.4.4.5):
2166 - Our "make check" target now runs the unit tests in 8 parallel
2167 chunks. Doing this speeds up hardened CI builds by more than a
2168 factor of two. Closes ticket 40098.
2170 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
2171 - Fix a rendezvous cache unit test that was triggering an underflow
2172 on the global rend cache allocation. Fixes bug 40125; bugfix
2174 - Fix another rendezvous cache unit test that was triggering an
2175 underflow on the global rend cache allocation. Fixes bug 40126;
2176 bugfix on 0.2.8.1-alpha.
2178 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
2179 - Fix a correctness bug that could cause an assertion failure if we
2180 ever tried using the buf_move_all() function with an empty input
2181 buffer. As far as we know, no released versions of Tor do this.
2182 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
2184 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
2185 - Remove a debug logging statement that uselessly spammed the logs.
2186 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2188 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
2189 - On a bridge, treat all connections from an ExtORPort as remote by
2190 default for the purposes of rate-limiting. Previously, bridges
2191 would treat the connection as local unless they explicitly
2192 received a "USERADDR" command. ExtORPort connections still count
2193 as local if there is a USERADDR command with an explicit local
2194 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
2196 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
2197 - Avoid a fatal assert() when failing to create a listener
2198 connection for an address that was in use. Fixes bug 40073; bugfix
2201 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
2202 - Adjust the rules for when to warn about having too many
2203 connections to other relays. Previously we'd tolerate up to 1.5
2204 connections per relay on average. Now we tolerate more connections
2205 for directory authorities, and raise the number of total
2206 connections we need to see before we warn. Fixes bug 33880; bugfix
2209 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2210 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2211 descriptors, when the IPv6 port was configured as "auto". Fixes
2212 bug 32588; bugfix on 0.2.3.9-alpha.
2214 o Minor bugfixes (tests, 0.4.4.5):
2215 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2216 on its own. Previously, it would exit with an error. Fixes bug
2217 40099; bugfix on 0.2.8.1-alpha.
2219 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
2220 - Fix a bug that prevented Tor from starting if its log file grew
2221 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
2223 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
2224 - Add a deprecation warning for version 2 onion services. Closes
2228 Changes in version 0.4.5.1-alpha - 2020-11-01
2229 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
2230 improves support for IPv6, address discovery and self-testing, code
2231 metrics and tracing.
2233 This release also fixes TROVE-2020-005, a security issue that could be
2234 used, under certain cases, by an adversary to observe traffic patterns
2235 on a limited number of circuits intended for a different relay. To
2236 mount this attack, the adversary would need to actively extend
2237 circuits to an incorrect address, as well as compromise a relay's
2238 legacy RSA-1024 key. We'll be backporting this fix to other release
2239 series soon, after it has had some testing.
2241 Here are the changes since 0.4.4.5.
2243 o Major features (build):
2244 - When building Tor, first link all object files into a single
2245 static library. This may help with embedding Tor in other
2246 programs. Note that most Tor functions do not constitute a part of
2247 a stable or supported API: only those functions in tor_api.h
2248 should be used if embedding Tor. Closes ticket 40127.
2250 o Major features (metrics):
2251 - Introduce a new MetricsPort which exposes, through an HTTP
2252 interface, a series of metrics that tor collects at runtime. At
2253 the moment, the only supported output format is Prometheus data
2254 model. Closes ticket 40063. See the manual page for more
2255 information and security considerations.
2256 o Major features (relay, IPv6):
2257 - The torrc option Address now supports IPv6. This unifies our
2258 address discovery interface to support IPv4, IPv6, and hostnames.
2259 Closes ticket 33233.
2260 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
2261 bridges. Closes ticket 33222.
2262 - Relays now automatically bind on IPv6 for their ORPort, unless
2263 specified otherwise with the IPv4Only flag. Closes ticket 33246.
2264 - When a relay with IPv6 support is told to open a connection to
2265 another relay, and the extend cell lists both IPv4 and IPv6
2266 addresses, the first relay now picks randomly which address to
2267 use. Closes ticket 33220.
2268 - Relays now track their IPv6 ORPort reachability separately from
2269 the reachability of their IPv4 ORPort. They will not publish a
2270 descriptor unless _both_ ports appear to be externally reachable.
2271 Closes ticket 34067.
2273 o Major features (tracing):
2274 - Add event-tracing library support for USDT and LTTng-UST, and a
2275 few tracepoints in the circuit subsystem. More will come
2276 incrementally. This feature is compiled out by default: it needs
2277 to be enabled at configure time. See documentation in
2278 doc/HACKING/Tracing.md. Closes ticket 32910.
2280 o Major bugfixes (security):
2281 - When completing a channel, relays now check more thoroughly to
2282 make sure that it matches any pending circuits before attaching
2283 those circuits. Previously, address correctness and Ed25519
2284 identities were not checked in this case, but only when extending
2285 circuits on an existing channel. Fixes bug 40080; bugfix on
2286 0.2.7.2-alpha. Resolves TROVE-2020-005.
2288 o Major bugfixes (TLS, buffer):
2289 - When attempting to read N bytes on a TLS connection, really try to
2290 read all N bytes. Previously, Tor would stop reading after the
2291 first TLS record, which can be smaller than the N bytes requested,
2292 and not check for more data until the next mainloop event. Fixes
2293 bug 40006; bugfix on 0.1.0.5-rc.
2295 o Minor features (address discovery):
2296 - If no Address statements are found, relays now prioritize guessing
2297 their address by looking at the local interface instead of the
2298 local hostname. If the interface address can't be found, the local
2299 hostname is used. Closes ticket 33238.
2301 o Minor features (admin tools):
2302 - Add a new --format argument to -key-expiration option to allow
2303 specifying the time format of the expiration date. Adds Unix
2304 timestamp format support. Patch by Daniel Pinto. Closes
2307 o Minor features (bootstrap reporting):
2308 - When reporting bootstrapping status on a relay, do not consider
2309 connections that have never been the target of an origin circuit.
2310 Previously, all connection failures were treated as potential
2311 bootstrapping failures, including connections that had been opened
2312 because of client requests. Closes ticket 25061.
2314 o Minor features (build):
2315 - When running the configure script, try to detect version
2316 mismatches between the OpenSSL headers and libraries, and suggest
2317 that the user should try "--with-openssl-dir". Closes 40138.
2318 - If the configure script has given any warnings, remind the user
2319 about them at the end of the script. Related to 40138.
2321 o Minor features (configuration):
2322 - Allow using wildcards (* and ?) with the %include option on
2323 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
2324 - Allow the configuration options EntryNodes, ExcludeNodes,
2325 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
2326 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
2327 Patch by Daniel Pinto.
2329 o Minor features (control port):
2330 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2331 and reset the current timeout. Closes ticket 40002.
2332 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2333 send a control port event. Closes ticket 32190. Patch by
2335 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2336 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2337 onion handshake counts respectively. Closes ticket 28279. Patch by
2340 o Minor features (control port, IPv6):
2341 - Tor relays now try to report to the controller when they are
2342 launching an IPv6 self-test. Closes ticket 34068.
2343 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2344 control port to fetch the Tor host's respective IPv4 or IPv6
2345 address. We keep "GETINFO address" for backwards-compatibility.
2346 Closes ticket 40039. Patch by Neel Chauhan.
2348 o Minor features (directory authorities):
2349 - Authorities now list a different set of protocols as required and
2350 recommended. These lists have been chosen so that only truly
2351 recommended and/or required protocols are included, and so that
2352 clients using 0.2.9 or later will continue to work (even though
2353 they are not supported), whereas only relays running 0.3.5 or
2354 later will meet the requirements. Closes ticket 40162.
2355 - Add a new consensus method 30 that removes the unnecessary "="
2356 padding from ntor-onion-key. Closes ticket 7869. Patch by
2358 - Directory authorities now reject descriptors from relays running
2359 Tor versions from the obsolete 0.4.1 series. Resolves ticket
2360 34357. Patch by Neel Chauhan.
2361 - Make it possible to specify multiple ConsensusParams torrc lines.
2362 Now directory authority operators can for example put the main
2363 ConsensusParams config in one torrc file and then add to it from a
2364 different torrc file. Closes ticket 40164.
2365 - The AssumeReachable option no longer stops directory authorities
2366 from checking whether other relays are running. A new
2367 AuthDirTestReachability option can be used to disable these
2368 checks. Closes ticket 34445.
2369 - When looking for possible Sybil attacks, also consider IPv6
2370 addresses. Two routers are considered to have "the same" address
2371 by this metric if they are in the same /64 network. Patch from
2372 Maurice Pibouin. Closes ticket 7193.
2374 o Minor features (directory authorities, IPv6):
2375 - Make authorities add their IPv6 ORPort (if any) to the trusted
2376 servers list. Authorities previously added only their IPv4
2377 addresses. Closes ticket 32822.
2379 o Minor features (ed25519, relay):
2380 - Save a relay's base64-encoded ed25519 identity key to the data
2381 directory in a file named fingerprint-ed25519. Closes ticket
2382 30642. Patch by Neel Chauhan.
2384 o Minor features (heartbeat):
2385 - Include the total number of inbound and outbound IPv4 and IPv6
2386 connections in the heartbeat message. Closes ticket 29113.
2388 o Minor features (IPv6, ExcludeNodes):
2389 - Handle IPv6 addresses in ExcludeNodes; previously they were
2390 ignored. Closes ticket 34065. Patch by Neel Chauhan.
2392 o Minor features (logging):
2393 - Add the running glibc version to the log, and the compiled glibc
2394 version to the library list returned when using --library-versions.
2395 Patch from Daniel Pinto. Closes ticket 40047.
2396 - Consider an HTTP 301 response to be an error (like a 404) when
2397 processing a directory response. Closes ticket 40053.
2398 - Log directory fetch statistics as a single line. Closes
2400 - Provide more complete descriptions of our connections when logging
2401 about them. Closes ticket 40041.
2402 - When describing a relay in the logs, we now include its ed25519
2403 identity. Closes ticket 22668.
2405 o Minor features (onion services):
2406 - Only overwrite an onion service's existing hostname file if its
2407 contents are wrong. This enables read-only onion-service
2408 directories. Resolves ticket 40062. Patch by Neel Chauhan.
2410 o Minor features (pluggable transports):
2411 - Add an OutboundBindAddressPT option to allow users to specify
2412 which IPv4 and IPv6 address pluggable transports should use for
2413 outgoing IP packets. Tor does not have a way to enforce that the
2414 pluggable transport honors this option, so each pluggable transport
2415 needs to implement support on its own. Closes ticket 5304.
2417 o Minor features (relay address tracking):
2418 - We now store relay addresses for OR connections in a more logical
2419 way. Previously we would sometimes overwrite the actual address of
2420 a connection with a "canonical address", and then store the "real
2421 address" elsewhere to remember it. We now track the "canonical
2422 address" elsewhere for the cases where we need it, and leave the
2423 connection's address alone. Closes ticket 33898.
2425 o Minor features (relay):
2426 - If a relay is unable to discover its address, attempt to learn it
2427 from the NETINFO cell. Closes ticket 40022.
2428 - Log immediately when launching a relay self-check. Previously we
2429 would try to log before launching checks, or approximately when we
2430 intended to launch checks, but this tended to be error-prone.
2431 Closes ticket 34137.
2433 o Minor features (relay, address discovery):
2434 - If Address option is not found in torrc, attempt to learn our
2435 address with the configured ORPort address if any. Closes
2438 o Minor features (relay, IPv6):
2439 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
2440 reachability. Closes part of ticket 33224.
2441 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
2442 parameters to be used in an emergency to tell relays that they
2443 should publish even if they cannot complete their ORPort self-
2444 checks. Closes ticket 34064 and part of 33224.
2445 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
2446 - Declare support for the Relay=3 subprotocol version. Closes
2448 - When launching IPv6 ORPort self-test circuits, make sure that the
2449 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
2451 o Minor features (specification update):
2452 - Several fields in microdescriptors, router descriptors, and
2453 consensus documents that were formerly optional are now required.
2454 Implements proposal 315; closes ticket 40132.
2456 o Minor features (state management):
2457 - When loading the state file, remove entries from the statefile
2458 that have been obsolete for a long time. Ordinarily Tor preserves
2459 unrecognized entries in order to keep forward-compatibility, but
2460 these entries have not actually been used in any release since
2461 before 0.3.5.x. Closes ticket 40137.
2463 o Minor features (statistics, ipv6):
2464 - Relays now publish IPv6-specific counts of single-direction versus
2465 bidirectional relay connections. Closes ticket 33264.
2466 - Relays now publish their IPv6 read and write statistics over time,
2467 if statistics are enabled. Closes ticket 33263.
2469 o Minor features (subprotocol versions):
2470 - Tor no longer allows subprotocol versions larger than 63.
2471 Previously version numbers up to UINT32_MAX were allowed, which
2472 significantly complicated our code. Implements proposal 318;
2473 closes ticket 40133.
2474 - Use the new limitations on subprotocol versions due to proposal
2475 318 to simplify our implementation. Part of ticket 40133.
2477 o Minor features (testing configuration):
2478 - The TestingTorNetwork option no longer implicitly sets
2479 AssumeReachable to 1. This change allows us to test relays' self-
2480 testing mechanisms, and to test authorities' relay-testing
2481 functionality. Closes ticket 34446.
2483 o Minor features (testing):
2484 - Added unit tests for channel_matches_target_addr_for_extend().
2485 Closes Ticket 33919. Patch by MrSquanchee.
2487 o Minor features (tests, v2 onion services):
2488 - Fix a rendezvous cache unit test that was triggering an underflow
2489 on the global rend cache allocation. Fixes bug 40125; bugfix
2491 - Fix another rendezvous cache unit test that was triggering an
2492 underflow on the global rend cache allocation. Fixes bug 40126;
2493 bugfix on 0.2.8.1-alpha.
2495 o Minor bugfixes (circuit padding):
2496 - When circpad_send_padding_cell_for_callback is called,
2497 `is_padding_timer_scheduled` flag was not reset. Now it is set to
2498 0 at the top of that function. Fixes bug 32671; bugfix
2500 - Add a per-circuit padding machine instance counter, so we can
2501 differentiate between shutdown requests for old machines on a
2502 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
2503 - Add the ability to keep circuit padding machines if they match a
2504 set of circuit states or purposes. This allows us to have machines
2505 that start up under some conditions but don't shut down under
2506 others. We now use this mask to avoid starting up introduction
2507 circuit padding again after the machines have already completed.
2508 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
2510 o Minor bugfixes (compatibility):
2511 - Strip '\r' characters when reading text files on Unix platforms.
2512 This should resolve an issue where a relay operator migrates a
2513 relay from Windows to Unix, but does not change the line ending of
2514 Tor's various state files to match the platform, and the CRLF line
2515 endings from Windows end up leaking into other files such as the
2516 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2518 o Minor bugfixes (compilation):
2519 - Fix compiler warnings that would occur when building with
2520 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2521 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2522 - Resolve a compilation warning that could occur in
2523 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2525 o Minor bugfixes (configuration):
2526 - Fix bug where %including a pattern ending with */ would include
2527 files and folders (instead of folders only) in versions of glibc <
2528 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
2531 o Minor bugfixes (control port):
2532 - Make sure we send the SOCKS request address in relay begin cells
2533 when a stream is attached with the purpose
2534 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
2535 Patch by Neel Chauhan.
2537 o Minor bugfixes (logging):
2538 - Remove a debug logging statement that uselessly spammed the logs.
2539 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2540 - When logging a rate-limited message about how many messages have
2541 been suppressed in the last N seconds, give an accurate value for
2542 N, rounded up to the nearest minute. Previously we would report
2543 the size of the rate-limiting interval, regardless of when the
2544 messages started to occur. Fixes bug 19431; bugfix
2547 o Minor bugfixes (relay configuration, crash):
2548 - Avoid a fatal assert() when failing to create a listener
2549 connection for an address that was in use. Fixes bug 40073; bugfix
2552 o Minor bugfixes (rust, protocol versions):
2553 - Declare support for the onion service introduction point denial of
2554 service extensions when building with Rust. Fixes bug 34248;
2555 bugfix on 0.4.2.1-alpha.
2556 - Make Rust protocol version support checks consistent with the
2557 undocumented error behavior of the corresponding C code. Fixes bug
2558 34251; bugfix on 0.3.3.5-rc.
2560 o Minor bugfixes (self-testing):
2561 - When receiving an incoming circuit, only accept it as evidence
2562 that we are reachable if the declared address of its channel is
2563 the same address we think that we have. Otherwise, it could be
2564 evidence that we're reachable on some other address. Fixes bug
2565 20165; bugfix on 0.1.0.1-rc.
2567 o Minor bugfixes (spec conformance):
2568 - Use the correct key type when generating signing->link
2569 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
2571 o Minor bugfixes (subprotocol versions):
2572 - Consistently reject extra commas, instead of only rejecting
2573 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
2574 - In summarize_protover_flags(), treat empty strings the same as
2575 NULL. This prevents protocols_known from being set. Previously, we
2576 treated empty strings as normal strings, which led to
2577 protocols_known being set. Fixes bug 34232; bugfix on
2578 0.3.3.2-alpha. Patch by Neel Chauhan.
2580 o Minor bugfixes (v2 onion services):
2581 - For HSFETCH commands on v2 onion services addresses, check the
2582 length of bytes decoded, not the base32 length. Fixes bug 34400;
2583 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2585 o Code simplification and refactoring:
2586 - Add and use a set of functions to perform down-casts on constant
2587 connection and channel pointers. Closes ticket 40046.
2588 - Refactor our code that logs descriptions of connections, channels,
2589 and the peers on them, to use a single call path. This change
2590 enables us to refactor the data types that they use, and eliminates
2591 many confusing usages of those types. Closes ticket 40041.
2592 - Refactor some common node selection code into a single function.
2593 Closes ticket 34200.
2594 - Remove the now-redundant 'outbuf_flushlen' field from our
2595 connection type. It was previously used for an older version of
2596 our rate-limiting logic. Closes ticket 33097.
2597 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
2598 instead, for consistency with other code. Closes ticket 18106.
2599 - Rename functions about "advertised" ports which are not in fact
2600 guaranteed to return the ports that have been advertised. Closes
2602 - Split implementation of several command line options from
2603 options_init_from_torrc into smaller isolated functions. Patch by
2604 Daniel Pinto. Closes ticket 40102.
2605 - When an extend cell is missing an IPv4 or IPv6 address, fill in
2606 the address from the extend info. This is similar to what was done
2607 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
2610 o Deprecated features:
2611 - The "non-builtin" argument to the "--dump-config" command is now
2612 deprecated. When it works, it behaves the same as "short", which
2613 you should use instead. Closes ticket 33398.
2616 - Replace URLs from our old bugtracker so that they refer to the new
2617 bugtracker and wiki. Closes ticket 40101.
2620 - We no longer ship or build a "tor.service" file for use with
2621 systemd. No distribution included this script unmodified, and we
2622 don't have the expertise ourselves to maintain this in a way that
2623 all the various systemd-based distributions can use. Closes
2625 - We no longer ship support for the Android logging API. Modern
2626 versions of Android can use the syslog API instead. Closes
2628 - The "optimistic data" feature is now always on; there is no longer
2629 an option to disable it from the torrc file or from the consensus
2630 directory. Closes part of 40139.
2631 - The "usecreatefast" network parameter is now removed; there is no
2632 longer an option for authorities to turn it off. Closes part
2636 - Add unit tests for bandwidth statistics manipulation functions.
2637 Closes ticket 33812. Patch by MrSquanchee.
2639 o Code simplification and refactoring (autoconf):
2640 - Remove autoconf checks for unused funcs and headers. Closes ticket
2641 31699; Patch by @bduszel
2643 o Code simplification and refactoring (maintainer scripts):
2644 - Disable by default the pre-commit hook. Use the environment
2645 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
2646 Furthermore, stop running practracker in the pre-commit hook and
2647 make check-local. Closes ticket 40019.
2649 o Code simplification and refactoring (relay address):
2650 - Most of IPv4 representation was using "uint32_t". It has now been
2651 moved to use the internal "tor_addr_t" interface instead. This is
2652 so we can properly integrate IPv6 along IPv4 with common
2653 interfaces. Closes ticket 40043.
2655 o Documentation (manual page):
2656 - Move them from doc/ to doc/man/. Closes ticket 40044.
2657 - Describe the status of the "Sandbox" option more accurately. It is
2658 no longer "experimental", but it _is_ dependent on kernel and libc
2659 versions. Closes ticket 23378.
2661 o Documentation (tracing):
2662 - Document in depth the circuit subsystem trace events in the new
2663 doc/tracing/EventsCircuit.md. Closes ticket 40036.
2666 Changes in version 0.4.4.5 - 2020-09-15
2667 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
2668 series improves our guard selection algorithms, adds v3 onion balance
2669 support, improves the amount of code that can be disabled when running
2670 without relay support, and includes numerous small bugfixes and
2671 enhancements. It also lays the ground for some IPv6 features that
2672 we'll be developing more in the next (0.4.5) series.
2674 Per our support policy, we support each stable release series for nine
2675 months after its first stable release, or three months after the first
2676 stable release of the next series: whichever is longer. This means
2677 that 0.4.4.x will be supported until around June 2021--or later, if
2678 0.4.5.x is later than anticipated.
2680 Note also that support for 0.4.2.x has just ended; support for 0.4.3
2681 will continue until Feb 15, 2021. We still plan to continue supporting
2682 0.3.5.x, our long-term stable series, until Feb 2022.
2684 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2685 since 0.4.3.6, see the ReleaseNotes file.
2687 o Major bugfixes (onion services, DoS):
2688 - Correct handling of parameters for the onion service DoS defense.
2689 Previously, the consensus parameters for the onion service DoS
2690 defenses were overwriting the parameters set by the service
2691 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
2692 40109; bugfix on 0.4.2.1-alpha.
2694 o Major bugfixes (stats, onion services):
2695 - Fix a bug where we were undercounting the Tor network's total
2696 onion service traffic, by ignoring any traffic originating from
2697 clients. Now we count traffic from both clients and services.
2698 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2700 o Minor features (control port):
2701 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
2702 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
2703 Closes ticket 40089. Patch by Neel Chauhan.
2705 o Minor features (denial-of-service memory limiter):
2706 - Allow the user to configure even lower values for the
2707 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
2708 when previously the minimum was 256 MB. On clients, there is no
2709 minimum. Relays and clients will both warn if the value is set so
2710 low that Tor is likely to stop working. Closes ticket 24308.
2712 o Minor features (tests):
2713 - Our "make check" target now runs the unit tests in 8 parallel
2714 chunks. Doing this speeds up hardened CI builds by more than a
2715 factor of two. Closes ticket 40098.
2717 o Minor bugfixes (guard selection algorithm):
2718 - Avoid needless guard-related warning when upgrading from 0.4.3 to
2719 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
2721 o Minor bugfixes (tests):
2722 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2723 on its own. Previously, it would exit with an error. Fixes bug
2724 40099; bugfix on 0.2.8.1-alpha.
2727 Changes in version 0.4.4.3-alpha - 2020-07-27
2728 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
2729 including one affecting NSS users, and several affecting the Linux
2732 o Major features (fallback directory list):
2733 - Replace the 148 fallback directories originally included in Tor
2734 0.4.1.4-rc (of which around 105 are still functional) with a list
2735 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2737 o Major bugfixes (NSS):
2738 - When running with NSS enabled, make sure that NSS knows to expect
2739 nonblocking sockets. Previously, we set our TCP sockets as
2740 nonblocking, but did not tell NSS, which in turn could lead to
2741 unexpected blocking behavior. Fixes bug 40035; bugfix
2744 o Minor bugfixes (linux seccomp2 sandbox):
2745 - Fix a regression on sandboxing rules for the openat() syscall. The
2746 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
2747 but broke with versions of glibc. We now choose a rule based on
2748 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
2750 - Makes the seccomp sandbox allow the correct syscall for opendir
2751 according to the running glibc version. This fixes crashes when
2752 reloading torrc with sandbox enabled when running on glibc 2.15 to
2753 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
2756 o Minor bugfixes (relay, usability):
2757 - Adjust the rules for when to warn about having too many
2758 connections to other relays. Previously we'd tolerate up to 1.5
2759 connections per relay on average. Now we tolerate more connections
2760 for directory authorities, and raise the number of total
2761 connections we need to see before we warn. Fixes bug 33880; bugfix
2765 - Replace most http:// URLs in our code and documentation with
2766 https:// URLs. (We have left unchanged the code in src/ext/, and
2767 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
2770 - Our "check-local" test target no longer tries to use the
2771 Coccinelle semantic patching tool parse all the C files. While it
2772 is a good idea to try to make sure Coccinelle works on our C
2773 before we run a Coccinelle patch, doing so on every test run has
2774 proven to be disruptive. You can still run this tool manually with
2775 "make check-cocci". Closes ticket 40030.
2778 Changes in version 0.3.5.11 - 2020-07-09
2779 Tor 0.3.5.11 backports fixes from later tor releases, including several
2780 usability, portability, and reliability fixes.
2782 This release also fixes TROVE-2020-001, a medium-severity denial of
2783 service vulnerability affecting all versions of Tor when compiled with
2784 the NSS encryption library. (This is not the default configuration.)
2785 Using this vulnerability, an attacker could cause an affected Tor
2786 instance to crash remotely. This issue is also tracked as CVE-2020-
2787 15572. Anybody running a version of Tor built with the NSS library
2788 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2791 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2792 - Fix a crash due to an out-of-bound memory access when Tor is
2793 compiled with NSS support. Fixes bug 33119; bugfix on
2794 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2797 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2798 - Fix a bug that was preventing DoS defenses from running on bridges
2799 with a pluggable transport. Previously, the DoS subsystem was not
2800 given the transport name of the client connection, thus failed to
2801 find the GeoIP cache entry for that client address. Fixes bug
2802 33491; bugfix on 0.3.3.2-alpha.
2804 o Minor features (testing, backport from 0.4.3.4-rc):
2805 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2806 variable to specify a list of space-separated test cases that
2807 should not be executed. We will use this to disable certain tests
2808 that are failing on Appveyor because of mismatched OpenSSL
2809 libraries. Part of ticket 33643.
2811 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2812 - Use the correct 64-bit printf format when compiling with MINGW on
2813 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2815 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2816 - Warn if the ContactInfo field is not set, and tell the relay
2817 operator that not having a ContactInfo field set might cause their
2818 relay to get rejected in the future. Fixes bug 33361; bugfix
2821 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2822 - Resume use of preemptively-built circuits when UseEntryGuards is set
2823 to 0. We accidentally disabled this feature with that config
2824 setting, leading to slower load times. Fixes bug 34303; bugfix
2827 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2828 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2829 style "/* falls through */" comments. Both Clang and GCC allow
2830 __attribute__((fallthrough)) instead, so that's what we're using
2831 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2833 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2834 - Fix a compiler warning on platforms with 32-bit time_t values.
2835 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2837 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2838 - When starting Tor any time after the first time in a process,
2839 register the thread in which it is running as the main thread.
2840 Previously, we only did this on Windows, which could lead to bugs
2841 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2844 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2845 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2846 if we are not running on Windows. Previously, non-Windows hosts
2847 would reject these line-endings in certain positions, making
2848 certain key files hard to move from one host to another. Fixes bug
2849 33032; bugfix on 0.3.5.1-alpha.
2851 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2852 - Downgrade a noisy log message that could occur naturally when
2853 receiving an extrainfo document that we no longer want. Fixes bug
2854 16016; bugfix on 0.2.6.3-alpha.
2856 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2857 - Remove a BUG() warning that would cause a stack trace if an onion
2858 service descriptor was freed while we were waiting for a
2859 rendezvous circuit to complete. Fixes bug 28992; bugfix
2862 o Testing (CI, backport from 0.4.3.4-rc):
2863 - In our Appveyor Windows CI, copy required DLLs to test and app
2864 directories, before running tor's tests. This ensures that tor.exe
2865 and test*.exe use the correct version of each DLL. This fix is not
2866 required, but we hope it will avoid DLL search issues in future.
2867 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2868 - On Appveyor, skip the crypto/openssl_version test, which is
2869 failing because of a mismatched library installation. Fix
2873 Changes in version 0.4.2.8 - 2020-07-09
2874 Tor 0.4.2.8 backports various fixes from later releases, including
2875 several that affect usability and portability.
2877 This release also fixes TROVE-2020-001, a medium-severity denial of
2878 service vulnerability affecting all versions of Tor when compiled with
2879 the NSS encryption library. (This is not the default configuration.)
2880 Using this vulnerability, an attacker could cause an affected Tor
2881 instance to crash remotely. This issue is also tracked as CVE-2020-
2882 15572. Anybody running a version of Tor built with the NSS library
2883 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2886 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2887 - Fix a crash due to an out-of-bound memory access when Tor is
2888 compiled with NSS support. Fixes bug 33119; bugfix on
2889 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2892 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2893 - Fix a bug that was preventing DoS defenses from running on bridges
2894 with a pluggable transport. Previously, the DoS subsystem was not
2895 given the transport name of the client connection, thus failed to
2896 find the GeoIP cache entry for that client address. Fixes bug
2897 33491; bugfix on 0.3.3.2-alpha.
2899 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
2900 - Default to sending SENDME version 1 cells. (Clients are already
2901 sending these, because of a consensus parameter telling them to do
2902 so: this change only affects what clients would do if the
2903 consensus didn't contain a recommendation.) Closes ticket 33623.
2905 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
2906 - Improve assertions and add some memory-poisoning code to try to
2907 track down possible causes of a rare crash (32564) in the EWMA
2908 code. Closes ticket 33290.
2910 o Minor features (testing, backport from 0.4.3.4-rc):
2911 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2912 variable to specify a list of space-separated test cases that
2913 should not be executed. We will use this to disable certain tests
2914 that are failing on Appveyor because of mismatched OpenSSL
2915 libraries. Part of ticket 33643.
2917 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2918 - Use the correct 64-bit printf format when compiling with MINGW on
2919 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2921 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2922 - Warn if the ContactInfo field is not set, and tell the relay
2923 operator that not having a ContactInfo field set might cause their
2924 relay to get rejected in the future. Fixes bug 33361; bugfix
2927 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2928 - Resume use of preemptively-built circuits when UseEntryGuards is set
2929 to 0. We accidentally disabled this feature with that config
2930 setting, leading to slower load times. Fixes bug 34303; bugfix
2933 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2934 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2935 style "/* falls through */" comments. Both Clang and GCC allow
2936 __attribute__((fallthrough)) instead, so that's what we're using
2937 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2938 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2941 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2942 - Fix a compiler warning on platforms with 32-bit time_t values.
2943 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2945 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
2946 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
2947 report them as SIGNAL events. Previously we would log a bug
2948 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
2950 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2951 - When starting Tor any time after the first time in a process,
2952 register the thread in which it is running as the main thread.
2953 Previously, we only did this on Windows, which could lead to bugs
2954 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2957 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2958 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2959 if we are not running on Windows. Previously, non-Windows hosts
2960 would reject these line-endings in certain positions, making
2961 certain key files hard to move from one host to another. Fixes bug
2962 33032; bugfix on 0.3.5.1-alpha.
2964 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
2965 - When logging a bug, do not say "Future instances of this warning
2966 will be silenced" unless we are actually going to silence them.
2967 Previously we would say this whenever a BUG() check failed in the
2968 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
2970 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
2971 - Flush stderr, stdout, and file logs during shutdown, if supported
2972 by the OS. This change helps make sure that any final logs are
2973 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2975 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2976 - Downgrade a noisy log message that could occur naturally when
2977 receiving an extrainfo document that we no longer want. Fixes bug
2978 16016; bugfix on 0.2.6.3-alpha.
2980 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2981 - Remove a BUG() warning that would cause a stack trace if an onion
2982 service descriptor was freed while we were waiting for a
2983 rendezvous circuit to complete. Fixes bug 28992; bugfix
2986 o Testing (CI, backport from 0.4.3.4-rc):
2987 - In our Appveyor Windows CI, copy required DLLs to test and app
2988 directories, before running tor's tests. This ensures that tor.exe
2989 and test*.exe use the correct version of each DLL. This fix is not
2990 required, but we hope it will avoid DLL search issues in future.
2991 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2992 - On Appveyor, skip the crypto/openssl_version test, which is
2993 failing because of a mismatched library installation. Fix
2997 Changes in version 0.4.3.6 - 2020-07-09
2998 Tor 0.4.3.6 backports several bugfixes from later releases, including
2999 some affecting usability.
3001 This release also fixes TROVE-2020-001, a medium-severity denial of
3002 service vulnerability affecting all versions of Tor when compiled with
3003 the NSS encryption library. (This is not the default configuration.)
3004 Using this vulnerability, an attacker could cause an affected Tor
3005 instance to crash remotely. This issue is also tracked as CVE-2020-
3006 15572. Anybody running a version of Tor built with the NSS library
3007 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3010 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
3011 - Fix a crash due to an out-of-bound memory access when Tor is
3012 compiled with NSS support. Fixes bug 33119; bugfix on
3013 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3016 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
3017 - Use the correct 64-bit printf format when compiling with MINGW on
3018 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3020 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
3021 - Resume use of preemptively-built circuits when UseEntryGuards is set
3022 to 0. We accidentally disabled this feature with that config
3023 setting, leading to slower load times. Fixes bug 34303; bugfix
3026 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
3027 - Fix a compiler warning on platforms with 32-bit time_t values.
3028 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3030 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
3031 - Fix a startup crash when tor is compiled with --enable-nss and
3032 sandbox support is enabled. Fixes bug 34130; bugfix on
3033 0.3.5.1-alpha. Patch by Daniel Pinto.
3035 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
3036 - Downgrade a noisy log message that could occur naturally when
3037 receiving an extrainfo document that we no longer want. Fixes bug
3038 16016; bugfix on 0.2.6.3-alpha.
3040 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
3041 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3042 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3044 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
3045 - Prevent an assert() that would occur when cleaning the client
3046 descriptor cache, and attempting to close circuits for a non-
3047 decrypted descriptor (lacking client authorization). Fixes bug
3048 33458; bugfix on 0.4.2.1-alpha.
3050 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
3051 - Fix a portability error in the configure script, where we were
3052 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3054 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
3055 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3056 descriptors, when the IPv6 port was configured as "auto". Fixes
3057 bug 32588; bugfix on 0.2.3.9-alpha.
3059 o Documentation (backport from 0.4.4.1-alpha):
3060 - Fix several doxygen warnings related to imbalanced groups. Closes
3064 Changes in version 0.4.4.2-alpha - 2020-07-09
3065 This is the second alpha release in the 0.4.4.x series. It fixes a few
3066 bugs in the previous release, and solves a few usability,
3067 compatibility, and portability issues.
3069 This release also fixes TROVE-2020-001, a medium-severity denial of
3070 service vulnerability affecting all versions of Tor when compiled with
3071 the NSS encryption library. (This is not the default configuration.)
3072 Using this vulnerability, an attacker could cause an affected Tor
3073 instance to crash remotely. This issue is also tracked as CVE-2020-
3074 15572. Anybody running a version of Tor built with the NSS library
3075 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
3078 o Major bugfixes (NSS, security):
3079 - Fix a crash due to an out-of-bound memory access when Tor is
3080 compiled with NSS support. Fixes bug 33119; bugfix on
3081 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
3084 o Minor features (bootstrap reporting):
3085 - Report more detailed reasons for bootstrap failure when the
3086 failure happens due to a TLS error. Previously we would just call
3087 these errors "MISC" when they happened during read, and "DONE"
3088 when they happened during any other TLS operation. Closes
3091 o Minor features (directory authority):
3092 - Authorities now recommend the protocol versions that are supported
3093 by Tor 0.3.5 and later. (Earlier versions of Tor have been
3094 deprecated since January of this year.) This recommendation will
3095 cause older clients and relays to give a warning on startup, or
3096 when they download a consensus directory. Closes ticket 32696.
3098 o Minor features (entry guards):
3099 - Reinstate support for GUARD NEW/UP/DOWN control port events.
3100 Closes ticket 40001.
3102 o Minor features (linux seccomp2 sandbox, portability):
3103 - Allow Tor to build on platforms where it doesn't know how to
3104 report which syscall caused the linux seccomp2 sandbox to fail.
3105 This change should make the sandbox code more portable to less
3106 common Linux architectures. Closes ticket 34382.
3107 - Permit the unlinkat() syscall, which some Libc implementations use
3108 to implement unlink(). Closes ticket 33346.
3110 o Minor bugfix (CI, Windows):
3111 - Use the correct 64-bit printf format when compiling with MINGW on
3112 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
3114 o Minor bugfix (onion service v3 client):
3115 - Remove a BUG() warning that could occur naturally. Fixes bug
3116 34087; bugfix on 0.3.2.1-alpha.
3118 o Minor bugfix (SOCKS, onion service client):
3119 - Detect v3 onion service addresses of the wrong length when
3120 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
3123 o Minor bugfixes (compiler warnings):
3124 - Fix a compiler warning on platforms with 32-bit time_t values.
3125 Fixes bug 40028; bugfix on 0.3.2.8-rc.
3127 o Minor bugfixes (control port, onion service):
3128 - Consistently use 'address' in "Invalid v3 address" response to
3129 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
3130 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
3132 o Minor bugfixes (logging):
3133 - Downgrade a noisy log message that could occur naturally when
3134 receiving an extrainfo document that we no longer want. Fixes bug
3135 16016; bugfix on 0.2.6.3-alpha.
3137 o Minor bugfixes (onion services v3):
3138 - Avoid a non-fatal assertion failure in certain edge-cases when
3139 opening an intro circuit as a client. Fixes bug 34084; bugfix
3142 o Deprecated features (onion service v2):
3143 - Add a deprecation warning for version 2 onion services. Closes
3146 o Removed features (IPv6, revert):
3147 - Revert the change in the default value of ClientPreferIPv6OrPort:
3148 it breaks the torsocks use case. The SOCKS resolve command has no
3149 mechanism to ask for a specific address family (v4 or v6), and so
3150 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
3151 interface resulted in a failure. Tor Browser explicitly sets
3152 PreferIPv6, so this should not affect the majority of our users.
3153 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
3156 Changes in version 0.4.4.1-alpha - 2020-06-16
3157 This is the first alpha release in the 0.4.4.x series. It improves
3158 our guard selection algorithms, improves the amount of code that
3159 can be disabled when running without relay support, and includes numerous
3160 small bugfixes and enhancements. It also lays the ground for some IPv6
3161 features that we'll be developing more in the next (0.4.5) series.
3163 Here are the changes since 0.4.3.5.
3165 o Major features (Proposal 310, performance + security):
3166 - Implements Proposal 310, "Bandaid on guard selection". Proposal
3167 310 solves load-balancing issues with older versions of the guard
3168 selection algorithm, and improves its security. Under this new
3169 algorithm, a newly selected guard never becomes Primary unless all
3170 previously sampled guards are unreachable. Implements
3171 recommendation from 32088. (Proposal 310 is linked to the CLAPS
3172 project researching optimal client location-aware path selections.
3173 This project is a collaboration between the UCLouvain Crypto Group,
3174 the U.S. Naval Research Laboratory, and Princeton University.)
3176 o Major features (IPv6, relay):
3177 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
3178 warning if the IPv4 or IPv6 address is an internal address, and
3179 internal addresses are not allowed. But continue to use the other
3180 address, if it is valid. Closes ticket 33817.
3181 - If a relay can extend over IPv4 and IPv6, and both addresses are
3182 provided, it chooses between them uniformly at random. Closes
3184 - Re-use existing IPv6 connections for circuit extends. Closes
3186 - Relays may extend circuits over IPv6, if the relay has an IPv6
3187 ORPort, and the client supplies the other relay's IPv6 ORPort in
3188 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
3189 ORPort self-tests in 33222. Closes ticket 33817.
3191 o Major features (v3 onion services):
3192 - Allow v3 onion services to act as OnionBalance backend instances,
3193 by using the HiddenServiceOnionBalanceInstance torrc option.
3194 Closes ticket 32709.
3196 o Minor feature (developer tools):
3197 - Add a script to help check the alphabetical ordering of option
3198 names in the manual page. Closes ticket 33339.
3200 o Minor feature (onion service client, SOCKS5):
3201 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
3202 new type of onion service connection failures. The semantics of
3203 these error codes are documented in proposal 309. Closes
3206 o Minor feature (onion service v3):
3207 - If a service cannot upload its descriptor(s), log why at INFO
3208 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
3210 o Minor feature (python scripts):
3211 - Stop assuming that /usr/bin/python exists. Instead of using a
3212 hardcoded path in scripts that still use Python 2, use
3213 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
3214 bug 33192; bugfix on 0.4.2.
3216 o Minor features (client-only compilation):
3217 - Disable more code related to the ext_orport protocol when
3218 compiling without support for relay mode. Closes ticket 33368.
3219 - Disable more of our self-testing code when support for relay mode
3220 is disabled. Closes ticket 33370.
3222 o Minor features (code safety):
3223 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
3224 functions in DNS and IP address processing code, and adjust
3225 codepaths to make them less likely to crash entire Tor instances.
3226 Resolves issue 33788.
3228 o Minor features (compilation size):
3229 - Most server-side DNS code is now disabled when building without
3230 support for relay mode. Closes ticket 33366.
3232 o Minor features (continuous integration):
3233 - Run unit-test and integration test (Stem, Chutney) jobs with
3234 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
3235 Resolves ticket 32143.
3237 o Minor features (control port):
3238 - Return a descriptive error message from the 'GETINFO status/fresh-
3239 relay-descs' command on the control port. Previously, we returned
3240 a generic error of "Error generating descriptor". Closes ticket
3241 32873. Patch by Neel Chauhan.
3243 o Minor features (developer tooling):
3244 - Refrain from listing all .a files that are generated by the Tor
3245 build in .gitignore. Add a single wildcard *.a entry that covers
3246 all of them for present and future. Closes ticket 33642.
3247 - Add a script ("git-install-tools.sh") to install git hooks and
3248 helper scripts. Closes ticket 33451.
3250 o Minor features (directory authority, shared random):
3251 - Refactor more authority-only parts of the shared-random scheduling
3252 code to reside in the dirauth module, and to be disabled when
3253 compiling with --disable-module-dirauth. Closes ticket 33436.
3255 o Minor features (directory):
3256 - Remember the number of bytes we have downloaded for each directory
3257 purpose while bootstrapping, and while fully bootstrapped. Log
3258 this information as part of the heartbeat message. Closes
3261 o Minor features (IPv6 support):
3262 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
3263 changes and tor_addr_is_null(). Closes ticket 33679. Patch
3265 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
3266 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
3267 Closes ticket 33901.
3269 o Minor features (logging):
3270 - When trying to find our own address, add debug-level logging to
3271 report the sources of candidate addresses. Closes ticket 32888.
3273 o Minor features (testing, architecture):
3274 - Our test scripts now double-check that subsystem initialization
3275 order is consistent with the inter-module dependencies established
3276 by our .may_include files. Implements ticket 31634.
3277 - Initialize all subsystems at the beginning of our unit test
3278 harness, to avoid crashes due to uninitialized subsystems. Follow-
3279 up from ticket 33316.
3281 o Minor features (v3 onion services):
3282 - Add v3 onion service status to the dumpstats() call which is
3283 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
3284 services. Closes ticket 24844. Patch by Neel Chauhan.
3286 o Minor features (windows):
3287 - Add support for console control signals like Ctrl+C in Windows.
3288 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
3290 o Minor bugfix (onion service v3):
3291 - Prevent an assert() that would occur when cleaning the client
3292 descriptor cache, and attempting to close circuits for a non-
3293 decrypted descriptor (lacking client authorization). Fixes bug
3294 33458; bugfix on 0.4.2.1-alpha.
3296 o Minor bugfix (refactoring):
3297 - Lift circuit_build_times_disabled() out of the
3298 circuit_expire_building() loop, to save CPU time when there are
3299 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
3301 o Minor bugfixes (client performance):
3302 - Resume use of preemptively-built circuits when UseEntryGuards is set
3303 to 0. We accidentally disabled this feature with that config
3304 setting, leading to slower load times. Fixes bug 34303; bugfix
3307 o Minor bugfixes (directory authorities):
3308 - Directory authorities now reject votes that arrive too late. In
3309 particular, once an authority has started fetching missing votes,
3310 it no longer accepts new votes posted by other authorities. This
3311 change helps prevent a consensus split, where only some authorities
3312 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
3314 o Minor bugfixes (git scripts):
3315 - Stop executing the checked-out pre-commit hook from the pre-push
3316 hook. Instead, execute the copy in the user's git directory. Fixes
3317 bug 33284; bugfix on 0.4.1.1-alpha.
3319 o Minor bugfixes (initialization):
3320 - Initialize the subsystems in our code in an order more closely
3321 corresponding to their dependencies, so that every system is
3322 initialized before the ones that (theoretically) depend on it.
3323 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
3325 o Minor bugfixes (IPv4, relay):
3326 - Check for invalid zero IPv4 addresses and ports when sending and
3327 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3329 o Minor bugfixes (IPv6, relay):
3330 - Consider IPv6 addresses when checking if a connection is
3331 canonical. In 17604, relays assumed that a remote relay could
3332 consider an IPv6 connection canonical, but did not set the
3333 canonical flag on their side of the connection. Fixes bug 33899;
3334 bugfix on 0.3.1.1-alpha.
3335 - Log IPv6 addresses on connections where this relay is the
3336 responder. Previously, responding relays would replace the remote
3337 IPv6 address with the IPv4 address from the consensus. Fixes bug
3338 33899; bugfix on 0.3.1.1-alpha.
3340 o Minor bugfixes (linux seccomp sandbox nss):
3341 - Fix a startup crash when tor is compiled with --enable-nss and
3342 sandbox support is enabled. Fixes bug 34130; bugfix on
3343 0.3.5.1-alpha. Patch by Daniel Pinto.
3345 o Minor bugfixes (logging, testing):
3346 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
3347 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
3348 used to log a non-fatal warning, regardless of the debugging
3349 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
3351 o Minor bugfixes (logs):
3352 - Remove surprising empty line in the INFO-level log about circuit
3353 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
3355 o Minor bugfixes (mainloop):
3356 - Better guard against growing a buffer past its maximum 2GB in
3357 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
3359 o Minor bugfixes (manual page):
3360 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3361 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3363 o Minor bugfixes (onion service v3, client):
3364 - Remove a BUG() that was causing a stacktrace when a descriptor
3365 changed at an unexpected time. Fixes bug 28992; bugfix
3368 o Minor bugfixes (onion service, logging):
3369 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
3370 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
3372 o Minor bugfixes (portability):
3373 - Fix a portability error in the configure script, where we were
3374 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3376 o Minor bugfixes (protocol versions):
3377 - Sort tor's supported protocol version lists, as recommended by the
3378 tor directory specification. Fixes bug 33285; bugfix
3381 o Minor bugfixes (relays):
3382 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3383 descriptors, when the IPv6 port was configured as "auto". Fixes
3384 bug 32588; bugfix on 0.2.3.9-alpha.
3386 o Code simplification and refactoring:
3387 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
3388 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
3389 brackets, separating colon, and port number. Closes ticket 33956.
3390 Patch by Neel Chauhan.
3391 - Merge the orconn and ocirc events into the "core" subsystem, which
3392 manages or connections and origin circuits. Previously they were
3393 isolated in subsystems of their own.
3394 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
3395 inversion. Closes ticket 33633.
3396 - Move the circuit extend code to the relay module. Split the
3397 circuit extend function into smaller functions. Closes
3399 - Rewrite port_parse_config() to use the default port flags from
3400 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
3401 - Updated comments in 'scheduler.c' to reflect old code changes, and
3402 simplified the scheduler channel state change code. Closes
3406 - Document the limitations of using %include on config files with
3407 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
3408 0.3.1.1-alpha. Patch by Daniel Pinto.
3409 - Fix several doxygen warnings related to imbalanced groups. Closes
3413 - Remove the ClientAutoIPv6ORPort option. This option attempted to
3414 randomly choose between IPv4 and IPv6 for client connections, and
3415 wasn't a true implementation of Happy Eyeballs. Often, this option
3416 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
3417 Patch by Neel Chauhan.
3418 - Stop shipping contrib/dist/rc.subr file, as it is not being used
3419 on FreeBSD anymore. Closes issue 31576.
3422 - Add a basic IPv6 test to "make test-network". This test only runs
3423 when the local machine has an IPv6 stack. Closes ticket 33300.
3424 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
3425 These jobs run the IPv4-only and dual-stack chutney flavours from
3426 test-network-all. Closes ticket 33280.
3427 - Remove a redundant distcheck job. Closes ticket 33194.
3428 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
3429 chutney job. This job runs on macOS, so it's a bit slow. Closes
3431 - Sort the Travis jobs in order of speed. Putting the slowest jobs
3432 first takes full advantage of Travis job concurrency. Closes
3434 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3435 previously configured to fast_finish (which requires
3436 allow_failure), to speed up the build. Closes ticket 33195.
3437 - Test v3 onion services to tor's mixed IPv4 chutney network. And
3438 add a mixed IPv6 chutney network. These networks are used in the
3439 test-network-all, test-network-ipv4, and test-network-ipv6 make
3440 targets. Closes ticket 33334.
3441 - Use the "bridges+hs-v23" chutney network flavour in "make test-
3442 network". This test requires a recent version of chutney (mid-
3443 February 2020). Closes ticket 28208.
3444 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3445 tool to produce detailed diagnostic output. Closes ticket 32792.
3447 o Code simplification and refactoring (onion service):
3448 - Refactor configuration parsing to use the new config subsystem
3449 code. Closes ticket 33014.
3451 o Code simplification and refactoring (relay address):
3452 - Move a series of functions related to address resolving into their
3453 own files. Closes ticket 33789.
3455 o Documentation (manual page):
3456 - Add cross reference links and a table of contents to the HTML tor
3457 manual page. Closes ticket 33369. Work by Swati Thacker as part of
3458 Google Season of Docs.
3459 - Alphabetize the Denial of Service Mitigation Options, Directory
3460 Authority Server Options, Hidden Service Options, and Testing
3461 Network Options sections of the tor(1) manual page. Closes ticket
3462 33275. Work by Swati Thacker as part of Google Season of Docs.
3463 - Refrain from mentioning nicknames in manpage section for MyFamily
3464 torrc option. Resolves issue 33417.
3465 - Updated the options set by TestingTorNetwork in the manual page.
3466 Closes ticket 33778.
3469 Changes in version 0.4.3.5 - 2020-05-15
3470 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
3471 series adds support for building without relay code enabled, and
3472 implements functionality needed for OnionBalance with v3 onion
3473 services. It includes significant refactoring of our configuration and
3474 controller functionality, and fixes numerous smaller bugs and
3477 Per our support policy, we support each stable release series for nine
3478 months after its first stable release, or three months after the first
3479 stable release of the next series: whichever is longer. This means
3480 that 0.4.3.x will be supported until around February 2021--later, if
3481 0.4.4.x is later than anticipated.
3483 Note also that support for 0.4.1.x is about to end on May 20 of this
3484 year; 0.4.2.x will be supported until September 15. We still plan to
3485 continue supporting 0.3.5.x, our long-term stable series, until
3488 Below are the changes since 0.4.3.4-rc. For a complete list of changes
3489 since 0.4.2.6, see the ReleaseNotes file.
3491 o Minor bugfixes (compiler compatibility):
3492 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3493 style "/* falls through */" comments. Both Clang and GCC allow
3494 __attribute__((fallthrough)) instead, so that's what we're using
3495 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3496 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3499 o Minor bugfixes (logging):
3500 - Stop truncating IPv6 addresses and ports in channel and connection
3501 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
3502 - Fix a logic error in a log message about whether an address was
3503 invalid. Previously, the code would never report that onion
3504 addresses were onion addresses. Fixes bug 34131; bugfix
3508 Changes in version 0.4.3.4-rc - 2020-04-13
3509 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
3510 several bugs from earlier versions, including one affecting DoS
3511 defenses on bridges using pluggable transports.
3513 o Major bugfixes (DoS defenses, bridges, pluggable transport):
3514 - Fix a bug that was preventing DoS defenses from running on bridges
3515 with a pluggable transport. Previously, the DoS subsystem was not
3516 given the transport name of the client connection, thus failed to
3517 find the GeoIP cache entry for that client address. Fixes bug
3518 33491; bugfix on 0.3.3.2-alpha.
3520 o Minor feature (sendme, flow control):
3521 - Default to sending SENDME version 1 cells. (Clients are already
3522 sending these, because of a consensus parameter telling them to do
3523 so: this change only affects what clients would do if the
3524 consensus didn't contain a recommendation.) Closes ticket 33623.
3526 o Minor features (testing):
3527 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3528 variable to specify a list of space-separated test cases that
3529 should not be executed. We will use this to disable certain tests
3530 that are failing on Appveyor because of mismatched OpenSSL
3531 libraries. Part of ticket 33643.
3533 o Minor bugfixes (--disable-module-relay):
3534 - Fix an assertion failure when Tor is built without the relay
3535 module, and then invoked with the "User" option. Fixes bug 33668;
3536 bugfix on 0.4.3.1-alpha.
3538 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
3539 - Set some output arguments in the relay and dirauth module stubs,
3540 to guard against future stub argument handling bugs like 33668.
3541 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
3543 o Minor bugfixes (build system):
3544 - Correctly output the enabled module in the configure summary.
3545 Before that, the list shown was just plain wrong. Fixes bug 33646;
3546 bugfix on 0.4.3.2-alpha.
3548 o Minor bugfixes (client, IPv6):
3549 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
3550 Instead, prefer IPv6 connections by default, but allow users to
3551 change their configs using the "NoPreferIPv6" port flag. Fixes bug
3552 33608; bugfix on 0.4.3.1-alpha.
3553 - Revert PreferIPv6 set by default on the SocksPort because it broke
3554 the torsocks use case. Tor doesn't have a way for an application
3555 to request the hostname to be resolved for a specific IP version,
3556 but torsocks requires that. Up until now, IPv4 was used by default
3557 so torsocks is expecting that, and can't handle a possible IPv6
3558 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
3560 o Minor bugfixes (key portability):
3561 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3562 if we are not running on Windows. Previously, non-Windows hosts
3563 would reject these line-endings in certain positions, making
3564 certain key files hard to move from one host to another. Fixes bug
3565 33032; bugfix on 0.3.5.1-alpha.
3567 o Minor bugfixes (logging):
3568 - Flush stderr, stdout, and file logs during shutdown, if supported
3569 by the OS. This change helps make sure that any final logs are
3570 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3571 - Stop closing stderr and stdout during shutdown. Closing these file
3572 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
3575 o Minor bugfixes (onion services v3):
3576 - Relax severity of a log message that can appear naturally when
3577 decoding onion service descriptors as a relay. Also add some
3578 diagnostics to debug any future bugs in that area. Fixes bug
3579 31669; bugfix on 0.3.0.1-alpha.
3580 - Block a client-side assertion by disallowing the registration of
3581 an x25519 client auth key that's all zeroes. Fixes bug 33545;
3582 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
3584 o Code simplification and refactoring:
3585 - Disable our coding standards best practices tracker in our git
3586 hooks. (0.4.3 branches only.) Closes ticket 33678.
3589 - Avoid conflicts between the fake sockets in tor's unit tests, and
3590 real file descriptors. Resolves issues running unit tests with
3591 GitHub Actions, where the process that embeds or launches the
3592 tests has already opened a large number of file descriptors. Fixes
3593 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
3597 - In our Appveyor Windows CI, copy required DLLs to test and app
3598 directories, before running tor's tests. This ensures that tor.exe
3599 and test*.exe use the correct version of each DLL. This fix is not
3600 required, but we hope it will avoid DLL search issues in future.
3601 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3602 - On Appveyor, skip the crypto/openssl_version test, which is
3603 failing because of a mismatched library installation. Fix
3607 Changes in version 0.4.3.3-alpha - 2020-03-18
3608 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
3609 TROVE-2020-002, a major denial-of-service vulnerability that affected
3610 all released Tor instances since 0.2.1.5-alpha. Using this
3611 vulnerability, an attacker could cause Tor instances to consume a huge
3612 amount of CPU, disrupting their operations for several seconds or
3613 minutes. This attack could be launched by anybody against a relay, or
3614 by a directory cache against any client that had connected to it. The
3615 attacker could launch this attack as much as they wanted, thereby
3616 disrupting service or creating patterns that could aid in traffic
3617 analysis. This issue was found by OSS-Fuzz, and is also tracked
3620 We do not have reason to believe that this attack is currently being
3621 exploited in the wild, but nonetheless we advise everyone to upgrade
3622 as soon as packages are available.
3624 o Major bugfixes (security, denial-of-service):
3625 - Fix a denial-of-service bug that could be used by anyone to
3626 consume a bunch of CPU on any Tor relay or authority, or by
3627 directories to consume a bunch of CPU on clients or hidden
3628 services. Because of the potential for CPU consumption to
3629 introduce observable timing patterns, we are treating this as a
3630 high-severity security issue. Fixes bug 33119; bugfix on
3631 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3632 as TROVE-2020-002 and CVE-2020-10592.
3634 o Major bugfixes (circuit padding, memory leak):
3635 - Avoid a remotely triggered memory leak in the case that a circuit
3636 padding machine is somehow negotiated twice on the same circuit.
3637 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3638 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3640 o Major bugfixes (directory authority):
3641 - Directory authorities will now send a 503 (not enough bandwidth)
3642 code to clients when under bandwidth pressure. Known relays and
3643 other authorities will always be answered regardless of the
3644 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3646 o Minor features (diagnostic):
3647 - Improve assertions and add some memory-poisoning code to try to
3648 track down possible causes of a rare crash (32564) in the EWMA
3649 code. Closes ticket 33290.
3651 o Minor features (directory authorities):
3652 - Directory authorities now reject descriptors from relays running
3653 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
3654 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
3656 o Minor features (usability):
3657 - Include more information when failing to parse a configuration
3658 value. This should make it easier to tell what's going wrong when
3659 a configuration file doesn't parse. Closes ticket 33460.
3661 o Minor bugfix (relay, configuration):
3662 - Warn if the ContactInfo field is not set, and tell the relay
3663 operator that not having a ContactInfo field set might cause their
3664 relay to get rejected in the future. Fixes bug 33361; bugfix
3667 o Minor bugfixes (coding best practices checks):
3668 - Allow the "practracker" script to read unicode files when using
3669 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
3670 but didn't change the codec for opening files. Fixes bug 33374;
3671 bugfix on 0.4.3.1-alpha.
3673 o Minor bugfixes (continuous integration):
3674 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
3677 o Minor bugfixes (onion service v3, client):
3678 - Remove a BUG() warning that would cause a stack trace if an onion
3679 service descriptor was freed while we were waiting for a
3680 rendezvous circuit to complete. Fixes bug 28992; bugfix
3683 o Minor bugfixes (onion services v3):
3684 - Fix an assertion failure that could result from a corrupted
3685 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3686 bugfix on 0.3.3.1-alpha. This issue is also tracked
3689 o Documentation (manpage):
3690 - Alphabetize the Server and Directory server sections of the tor
3691 manpage. Also split Statistics options into their own section of
3692 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
3693 Google Season of Docs.
3694 - Document the __OwningControllerProcess torrc option and specify
3695 its polling interval. Resolves issue 32971.
3697 o Testing (Travis CI):
3698 - Remove a redundant distcheck job. Closes ticket 33194.
3699 - Sort the Travis jobs in order of speed: putting the slowest jobs
3700 first takes full advantage of Travis job concurrency. Closes
3702 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3703 previously configured to fast_finish (which requires
3704 allow_failure), to speed up the build. Closes ticket 33195.
3705 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3706 tool to produce detailed diagnostic output. Closes ticket 32792.
3709 Changes in version 0.4.2.7 - 2020-03-18
3710 This is the third stable release in the 0.4.2.x series. It backports
3711 numerous fixes from later releases, including a fix for TROVE-2020-
3712 002, a major denial-of-service vulnerability that affected all
3713 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
3714 an attacker could cause Tor instances to consume a huge amount of CPU,
3715 disrupting their operations for several seconds or minutes. This
3716 attack could be launched by anybody against a relay, or by a directory
3717 cache against any client that had connected to it. The attacker could
3718 launch this attack as much as they wanted, thereby disrupting service
3719 or creating patterns that could aid in traffic analysis. This issue
3720 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
3722 We do not have reason to believe that this attack is currently being
3723 exploited in the wild, but nonetheless we advise everyone to upgrade
3724 as soon as packages are available.
3726 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3727 - Fix a denial-of-service bug that could be used by anyone to
3728 consume a bunch of CPU on any Tor relay or authority, or by
3729 directories to consume a bunch of CPU on clients or hidden
3730 services. Because of the potential for CPU consumption to
3731 introduce observable timing patterns, we are treating this as a
3732 high-severity security issue. Fixes bug 33119; bugfix on
3733 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3734 as TROVE-2020-002 and CVE-2020-10592.
3736 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3737 - Avoid a remotely triggered memory leak in the case that a circuit
3738 padding machine is somehow negotiated twice on the same circuit.
3739 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3740 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3742 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
3743 - Directory authorities will now send a 503 (not enough bandwidth)
3744 code to clients when under bandwidth pressure. Known relays and
3745 other authorities will always be answered regardless of the
3746 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3748 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3749 - Stop allowing failures on the Travis CI stem tests job. It looks
3750 like all the stem hangs we were seeing before are now fixed.
3751 Closes ticket 33075.
3753 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3754 - Lowercase the configured value of BridgeDistribution before adding
3755 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3757 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3758 - If we encounter a bug when flushing a buffer to a TLS connection,
3759 only log the bug once per invocation of the Tor process.
3760 Previously we would log with every occurrence, which could cause
3761 us to run out of disk space. Fixes bug 33093; bugfix
3764 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3765 - Fix an assertion failure that could result from a corrupted
3766 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3767 bugfix on 0.3.3.1-alpha. This issue is also tracked
3770 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3771 - Fix a syntax warning given by newer versions of Rust that was
3772 creating problems for our continuous integration. Fixes bug 33212;
3773 bugfix on 0.3.5.1-alpha.
3775 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3776 - Remove a redundant distcheck job. Closes ticket 33194.
3777 - Sort the Travis jobs in order of speed: putting the slowest jobs
3778 first takes full advantage of Travis job concurrency. Closes
3780 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3781 previously configured to fast_finish (which requires
3782 allow_failure), to speed up the build. Closes ticket 33195.
3783 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3784 tool to produce detailed diagnostic output. Closes ticket 32792.
3787 Changes in version 0.4.1.9 - 2020-03-18
3788 Tor 0.4.1.9 backports important fixes from later Tor releases,
3789 including a fix for TROVE-2020-002, a major denial-of-service
3790 vulnerability that affected all released Tor instances since
3791 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
3792 instances to consume a huge amount of CPU, disrupting their operations
3793 for several seconds or minutes. This attack could be launched by
3794 anybody against a relay, or by a directory cache against any client
3795 that had connected to it. The attacker could launch this attack as
3796 much as they wanted, thereby disrupting service or creating patterns
3797 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
3798 and is also tracked as CVE-2020-10592.
3800 We do not have reason to believe that this attack is currently being
3801 exploited in the wild, but nonetheless we advise everyone to upgrade
3802 as soon as packages are available.
3804 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3805 - Fix a denial-of-service bug that could be used by anyone to
3806 consume a bunch of CPU on any Tor relay or authority, or by
3807 directories to consume a bunch of CPU on clients or hidden
3808 services. Because of the potential for CPU consumption to
3809 introduce observable timing patterns, we are treating this as a
3810 high-severity security issue. Fixes bug 33119; bugfix on
3811 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3812 as TROVE-2020-002 and CVE-2020-10592.
3814 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3815 - Avoid a remotely triggered memory leak in the case that a circuit
3816 padding machine is somehow negotiated twice on the same circuit.
3817 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3818 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3820 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3821 - Lowercase the configured value of BridgeDistribution before adding
3822 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3824 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3825 - If we encounter a bug when flushing a buffer to a TLS connection,
3826 only log the bug once per invocation of the Tor process.
3827 Previously we would log with every occurrence, which could cause
3828 us to run out of disk space. Fixes bug 33093; bugfix
3831 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3832 - Fix an assertion failure that could result from a corrupted
3833 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3834 bugfix on 0.3.3.1-alpha. This issue is also tracked
3837 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3838 - Fix a syntax warning given by newer versions of Rust that was
3839 creating problems for our continuous integration. Fixes bug 33212;
3840 bugfix on 0.3.5.1-alpha.
3842 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3843 - Remove a redundant distcheck job. Closes ticket 33194.
3844 - Sort the Travis jobs in order of speed: putting the slowest jobs
3845 first takes full advantage of Travis job concurrency. Closes
3847 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3848 previously configured to fast_finish (which requires
3849 allow_failure), to speed up the build. Closes ticket 33195.
3850 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3851 tool to produce detailed diagnostic output. Closes ticket 32792.
3854 Changes in version 0.3.5.10 - 2020-03-18
3855 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
3856 fix for TROVE-2020-002, a major denial-of-service vulnerability that
3857 affected all released Tor instances since 0.2.1.5-alpha. Using this
3858 vulnerability, an attacker could cause Tor instances to consume a huge
3859 amount of CPU, disrupting their operations for several seconds or
3860 minutes. This attack could be launched by anybody against a relay, or
3861 by a directory cache against any client that had connected to it. The
3862 attacker could launch this attack as much as they wanted, thereby
3863 disrupting service or creating patterns that could aid in traffic
3864 analysis. This issue was found by OSS-Fuzz, and is also tracked
3867 We do not have reason to believe that this attack is currently being
3868 exploited in the wild, but nonetheless we advise everyone to upgrade
3869 as soon as packages are available.
3871 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3872 - Fix a denial-of-service bug that could be used by anyone to
3873 consume a bunch of CPU on any Tor relay or authority, or by
3874 directories to consume a bunch of CPU on clients or hidden
3875 services. Because of the potential for CPU consumption to
3876 introduce observable timing patterns, we are treating this as a
3877 high-severity security issue. Fixes bug 33119; bugfix on
3878 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3879 as TROVE-2020-002 and CVE-2020-10592.
3881 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3882 - Correct how we use libseccomp. Particularly, stop assuming that
3883 rules are applied in a particular order or that more rules are
3884 processed after the first match. Neither is the case! In
3885 libseccomp <2.4.0 this lead to some rules having no effect.
3886 libseccomp 2.4.0 changed how rules are generated, leading to a
3887 different ordering, which in turn led to a fatal crash during
3888 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3891 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3892 - Stop allowing failures on the Travis CI stem tests job. It looks
3893 like all the stem hangs we were seeing before are now fixed.
3894 Closes ticket 33075.
3896 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3897 - Lowercase the configured value of BridgeDistribution before adding
3898 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3900 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
3901 - When running Tor with an option like --verify-config or
3902 --dump-config that does not start the event loop, avoid crashing
3903 if we try to exit early because of an error. Fixes bug 32407;
3904 bugfix on 0.3.3.1-alpha.
3906 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3907 - If we encounter a bug when flushing a buffer to a TLS connection,
3908 only log the bug once per invocation of the Tor process.
3909 Previously we would log with every occurrence, which could cause
3910 us to run out of disk space. Fixes bug 33093; bugfix
3913 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3914 - Fix an assertion failure that could result from a corrupted
3915 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3916 bugfix on 0.3.3.1-alpha. This issue is also tracked
3919 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3920 - Fix a syntax warning given by newer versions of Rust that was
3921 creating problems for our continuous integration. Fixes bug 33212;
3922 bugfix on 0.3.5.1-alpha.
3924 o Testing (backport from 0.4.3.1-alpha):
3925 - Re-enable the Travis CI macOS Chutney build, but don't let it
3926 prevent the Travis job from finishing. (The Travis macOS jobs are
3927 slow, so we don't want to have it delay the whole CI process.)
3928 Closes ticket 32629.
3929 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3930 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3931 fix the sandbox errors in 32722. Closes ticket 32240.
3933 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3934 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3936 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3937 - Remove a redundant distcheck job. Closes ticket 33194.
3938 - Sort the Travis jobs in order of speed: putting the slowest jobs
3939 first takes full advantage of Travis job concurrency. Closes
3941 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3942 previously configured to fast_finish (which requires
3943 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3944 tool to produce detailed diagnostic output. Closes ticket 32792.
3947 Changes in version 0.4.3.2-alpha - 2020-02-10
3948 This is the second stable alpha release in the Tor 0.4.3.x series. It
3949 fixes several bugs present in the previous alpha release. Anybody
3950 running the previous alpha should upgrade, and look for bugs in this
3953 o Major bugfixes (onion service client, authorization):
3954 - On a NEWNYM signal, purge entries from the ephemeral client
3955 authorization cache. The permanent ones are kept. Fixes bug 33139;
3956 bugfix on 0.4.3.1-alpha.
3958 o Minor features (best practices tracker):
3959 - Practracker now supports a --regen-overbroad option to regenerate
3960 the exceptions file, but only to revise exceptions to be _less_
3961 tolerant of best-practices violations. Closes ticket 32372.
3963 o Minor features (continuous integration):
3964 - Run Doxygen Makefile target on Travis, so we can learn about
3965 regressions in our internal documentation. Closes ticket 32455.
3966 - Stop allowing failures on the Travis CI stem tests job. It looks
3967 like all the stem hangs we were seeing before are now fixed.
3968 Closes ticket 33075.
3970 o Minor bugfixes (build system):
3971 - Revise configure options that were either missing or incorrect in
3972 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
3974 o Minor bugfixes (controller protocol):
3975 - Fix a memory leak introduced by refactoring of control reply
3976 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
3977 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
3979 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3980 report them as SIGNAL events. Previously we would log a bug
3981 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3983 o Minor bugfixes (logging):
3984 - If we encounter a bug when flushing a buffer to a TLS connection,
3985 only log the bug once per invocation of the Tor process.
3986 Previously we would log with every occurrence, which could cause
3987 us to run out of disk space. Fixes bug 33093; bugfix
3989 - When logging a bug, do not say "Future instances of this warning
3990 will be silenced" unless we are actually going to silence them.
3991 Previously we would say this whenever a BUG() check failed in the
3992 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3994 o Minor bugfixes (onion service v2):
3995 - Move a series of v2 onion service warnings to protocol-warning
3996 level because they can all be triggered remotely by a malformed
3997 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
3999 o Minor bugfixes (onion service v3, client authorization):
4000 - When removing client authorization credentials using the control
4001 port, also remove the associated descriptor, so the onion service
4002 can no longer be contacted. Fixes bug 33148; bugfix
4005 o Minor bugfixes (pluggable transports):
4006 - When receiving a message on standard error from a pluggable
4007 transport, log it at info level, rather than as a warning. Fixes
4008 bug 33005; bugfix on 0.4.0.1-alpha.
4010 o Minor bugfixes (rust, build):
4011 - Fix a syntax warning given by newer versions of Rust that was
4012 creating problems for our continuous integration. Fixes bug 33212;
4013 bugfix on 0.3.5.1-alpha.
4015 o Minor bugfixes (TLS bug handling):
4016 - When encountering a bug in buf_read_from_tls(), return a "MISC"
4017 error code rather than "WANTWRITE". This change might help avoid
4018 some CPU-wasting loops if the bug is ever triggered. Bug reported
4019 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
4021 o Code simplification and refactoring (mainloop):
4022 - Simplify the ip_address_changed() function by removing redundant
4023 checks. Closes ticket 33091.
4025 o Documentation (manpage):
4026 - Split "Circuit Timeout" options and "Node Selection" options into
4027 their own sections of the tor manpage. Closes tickets 32928 and
4028 32929. Work by Swati Thacker as part of Google Season of Docs.
4031 Changes in version 0.4.2.6 - 2020-01-30
4032 This is the second stable release in the 0.4.2.x series. It backports
4033 several bugfixes from 0.4.3.1-alpha, including some that had affected
4034 the Linux seccomp2 sandbox or Windows services. If you're running with
4035 one of those configurations, you'll probably want to upgrade;
4036 otherwise, you should be fine with 0.4.2.5.
4038 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4039 - Correct how we use libseccomp. Particularly, stop assuming that
4040 rules are applied in a particular order or that more rules are
4041 processed after the first match. Neither is the case! In
4042 libseccomp <2.4.0 this led to some rules having no effect.
4043 libseccomp 2.4.0 changed how rules are generated, leading to a
4044 different ordering, which in turn led to a fatal crash during
4045 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4047 - Fix crash when reloading logging configuration while the
4048 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4049 0.4.1.7. Patch by Peter Gerber.
4051 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
4052 - Use GCC/Clang's printf-checking feature to make sure that
4053 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4054 bugfix on 0.4.1.1-alpha.
4056 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
4057 - Avoid a possible crash when trying to log a (fatal) assertion
4058 failure about mismatched magic numbers in configuration objects.
4059 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4061 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
4062 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4063 test_practracker.sh script. Doing so caused a test failure. Fixes
4064 bug 32705; bugfix on 0.4.2.1-alpha.
4065 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4066 skipping practracker checks. Fixes bug 32705; bugfix
4069 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4070 - Initialize the publish/subscribe system when running as a windows
4071 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4073 o Testing (backport from 0.4.3.1-alpha):
4074 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4075 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4076 fix the sandbox errors in 32722. Closes ticket 32240.
4077 - Re-enable the Travis CI macOS Chutney build, but don't let it
4078 prevent the Travis job from finishing. (The Travis macOS jobs are
4079 slow, so we don't want to have it delay the whole CI process.)
4080 Closes ticket 32629.
4082 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4083 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4086 Changes in version 0.4.1.8 - 2020-01-30
4087 This release backports several bugfixes from later release series,
4088 including some that had affected the Linux seccomp2 sandbox or Windows
4089 services. If you're running with one of those configurations, you'll
4090 probably want to upgrade; otherwise, you should be fine with your
4091 current version of 0.4.1.x.
4093 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
4094 - Correct how we use libseccomp. Particularly, stop assuming that
4095 rules are applied in a particular order or that more rules are
4096 processed after the first match. Neither is the case! In
4097 libseccomp <2.4.0 this led to some rules having no effect.
4098 libseccomp 2.4.0 changed how rules are generated, leading to a
4099 different ordering, which in turn led to a fatal crash during
4100 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4102 - Fix crash when reloading logging configuration while the
4103 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4104 0.4.1.7. Patch by Peter Gerber.
4106 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
4107 - When running Tor with an option like --verify-config or
4108 --dump-config that does not start the event loop, avoid crashing
4109 if we try to exit early because of an error. Fixes bug 32407;
4110 bugfix on 0.3.3.1-alpha.
4112 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
4113 - Initialize the publish/subscribe system when running as a windows
4114 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4116 o Testing (backport from 0.4.3.1-alpha):
4117 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4118 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4119 fix the sandbox errors in 32722. Closes ticket 32240.
4120 - Re-enable the Travis CI macOS Chutney build, but don't let it
4121 prevent the Travis job from finishing. (The Travis macOS jobs are
4122 slow, so we don't want to have it delay the whole CI process.)
4123 Closes ticket 32629.
4125 o Testing (continuous integration, backport from 0.4.3.1-alpha):
4126 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4129 Changes in version 0.4.3.1-alpha - 2020-01-22
4130 This is the first alpha release in the 0.4.3.x series. It includes
4131 improved support for application integration of onion services, support
4132 for building in a client-only mode, and newly improved internal
4133 documentation (online at https://src-ref.docs.torproject.org/tor/). It
4134 also has numerous other small bugfixes and features, as well as
4135 improvements to our code's internal organization that should help us
4136 write better code in the future.
4138 o New system requirements:
4139 - When building Tor, you now need to have Python 3 in order to run
4140 the integration tests. (Python 2 is officially unsupported
4141 upstream, as of 1 Jan 2020.) Closes ticket 32608.
4143 o Major features (build system):
4144 - The relay code can now be disabled using the --disable-module-relay
4145 configure option. When this option is set, we also disable the
4146 dirauth module. Closes ticket 32123.
4147 - When Tor is compiled --disable-module-relay, we also omit the code
4148 used to act as a directory cache. Closes ticket 32487.
4150 o Major features (directory authority, ed25519):
4151 - Add support for banning a relay's ed25519 keys in the approved-
4152 routers file. This will help us migrate away from RSA keys in the
4153 future. Previously, only RSA keys could be banned in approved-
4154 routers. Resolves ticket 22029. Patch by Neel Chauhan.
4156 o Major features (onion service, controller):
4157 - New control port commands to manage client-side onion service
4158 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
4159 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
4160 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
4162 o Major features (onion service, SOCKS5):
4163 - Introduce a new SocksPort flag, ExtendedErrors, to support more
4164 detailed error codes in information for applications that support
4165 them. Closes ticket 30382; implements proposal 304.
4167 o Major features (proxy):
4168 - In addition to its current supported proxy types (HTTP CONNECT,
4169 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
4170 HAProxy server. A new torrc option was added to specify the
4171 address/port of the server: TCPProxy <protocol> <host>:<port>.
4172 Currently the only supported protocol for the option is haproxy.
4173 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
4175 o Major bugfixes (linux seccomp sandbox):
4176 - Correct how we use libseccomp. Particularly, stop assuming that
4177 rules are applied in a particular order or that more rules are
4178 processed after the first match. Neither is the case! In
4179 libseccomp <2.4.0 this led to some rules having no effect.
4180 libseccomp 2.4.0 changed how rules are generated, leading to a
4181 different ordering, which in turn led to a fatal crash during
4182 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
4184 - Fix crash when reloading logging configuration while the
4185 experimental sandbox is enabled. Fixes bug 32841; bugfix on
4186 0.4.1.7. Patch by Peter Gerber.
4188 o Major bugfixes (networking):
4189 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
4190 and accept strings as well as binary addresses. Fixes bug 32315;
4191 bugfix on 0.3.5.1-alpha.
4193 o Major bugfixes (onion service):
4194 - Report HS circuit failure back into the HS subsystem so we take
4195 appropriate action with regards to the client introduction point
4196 failure cache. This improves reachability of onion services, since
4197 now clients notice failing introduction circuits properly. Fixes
4198 bug 32020; bugfix on 0.3.2.1-alpha.
4200 o Minor feature (configure, build system):
4201 - Output a list of enabled/disabled features at the end of the
4202 configure process in a pleasing way. Closes ticket 31373.
4204 o Minor feature (heartbeat, onion service):
4205 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
4206 message. Closes ticket 31371.
4208 o Minor features (configuration validation):
4209 - Configuration validation can now be done by per-module callbacks,
4210 rather than a global validation function. This will let us reduce
4211 the size of config.c and some of its more cumbersome functions.
4212 Closes ticket 31241.
4214 o Minor features (configuration):
4215 - If a configured hardware crypto accelerator in AccelName is
4216 prefixed with "!", Tor now exits when it cannot be found. Closes
4218 - We now use flag-driven logic to warn about obsolete configuration
4219 fields, so that we can include their names. In 0.4.2, we used a
4220 special type, which prevented us from generating good warnings.
4221 Implements ticket 32404.
4223 o Minor features (controller):
4224 - Add stream isolation data to STREAM event. Closes ticket 19859.
4225 - Implement a new GETINFO command to fetch microdescriptor
4226 consensus. Closes ticket 31684.
4228 o Minor features (debugging, directory system):
4229 - Don't crash when we find a non-guard with a guard-fraction value
4230 set. Instead, log a bug warning, in an attempt to figure out how
4231 this happened. Diagnostic for ticket 32868.
4233 o Minor features (defense in depth):
4234 - Add additional checks around tor_vasprintf() usage, in case the
4235 function returns an error. Patch by Tobias Stoeckmann. Fixes
4238 o Minor features (developer tooling):
4239 - Remove the 0.2.9.x series branches from git scripts (git-merge-
4240 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
4241 Closes ticket 32772.
4243 o Minor features (developer tools):
4244 - Add a check_cocci_parse.sh script that checks that new code is
4245 parseable by Coccinelle. Add an exceptions file for unparseable
4246 files, and run the script from travis CI. Closes ticket 31919.
4247 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
4248 target. Closes ticket 31919.
4249 - Add a rename_c_identifiers.py tool to rename a bunch of C
4250 identifiers at once, and generate a well-formed commit message
4251 describing the change. This should help with refactoring. Closes
4253 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
4254 semantic patching tool with the correct flags. These flags are
4255 fairly easy to forget, and these scripts should help us use
4256 Coccinelle more effectively in the future. Closes ticket 31705.
4258 o Minor features (Doxygen):
4259 - Update Doxygen configuration file to a more recent template (from
4260 1.8.15). Closes ticket 32110.
4261 - "make doxygen" now works with out-of-tree builds. Closes
4263 - Make sure that doxygen outputs documentation for all of our C
4264 files. Previously, some were missing @file declarations, causing
4265 them to be ignored. Closes ticket 32307.
4266 - Our "make doxygen" target now respects --enable-fatal-warnings by
4267 default, and does not warn about items that are missing
4268 documentation. To warn about missing documentation, run configure
4269 with the "--enable-missing-doc-warnings" flag: doing so suspends
4270 fatal warnings for doxygen. Closes ticket 32385.
4272 o Minor features (git scripts):
4273 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
4274 customisation. Closes ticket 32347.
4275 - Add git-setup-dirs.sh, which sets up an upstream git repository
4276 and worktrees for tor maintainers. Closes ticket 29603.
4277 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
4278 remote. Closes ticket 32347.
4279 - Call the check_cocci_parse.sh script from the git commit and push
4280 hooks. Closes ticket 31919.
4281 - Make git-push-all.sh skip unchanged branches when pushing to
4282 upstream. The script already skipped unchanged test branches.
4283 Closes ticket 32216.
4284 - Make git-setup-dirs.sh create a master symlink in the worktree
4285 directory. Closes ticket 32347.
4286 - Skip unmodified source files when doing some existing git hook
4287 checks. Related to ticket 31919.
4289 o Minor features (IPv6, client):
4290 - Make Tor clients tell dual-stack exits that they prefer IPv6
4291 connections. This change is equivalent to setting the PreferIPv6
4292 flag on SOCKSPorts (and most other listener ports). Tor Browser
4293 has been setting this flag for some time, and we want to remove a
4294 client distinguisher at exits. Closes ticket 32637.
4296 o Minor features (portability, android):
4297 - When building for Android, disable some tests that depend on $HOME
4298 and/or pwdb, which Android doesn't have. Closes ticket 32825.
4299 Patch from Hans-Christoph Steiner.
4301 o Minor features (relay modularity):
4302 - Split the relay and server pluggable transport config code into
4303 separate files in the relay module. Disable this code when the
4304 relay module is disabled. Closes part of ticket 32213.
4305 - When the relay module is disabled, reject attempts to set the
4306 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
4307 ServerTransport* options, rather than ignoring the values of these
4308 options. Closes part of ticket 32213.
4310 o Minor features (relay):
4311 - When the relay module is disabled, change the default config so
4312 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
4314 o Minor features (release tools):
4315 - Port our ChangeLog formatting and sorting tools to Python 3.
4316 Closes ticket 32704.
4318 o Minor features (testing):
4319 - Detect some common failure cases for test_parseconf.sh in
4320 src/test/conf_failures. Closes ticket 32451.
4321 - Allow test_parseconf.sh to test expected log outputs for successful
4322 configs, as well as failed configs. Closes ticket 32451.
4323 - The test_parseconf.sh script now supports result variants for any
4324 combination of the optional libraries lzma, nss, and zstd. Closes
4327 o Minor features (tests, Android):
4328 - When running the unit tests on Android, create temporary files in
4329 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4330 patch from Hans-Christoph Steiner.
4332 o Minor bugfixes (bridges):
4333 - Lowercase the configured value of BridgeDistribution before adding
4334 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4336 o Minor bugfixes (build system):
4337 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4338 bugfix on 0.4.1.2-alpha.
4340 o Minor bugfixes (configuration handling):
4341 - Make control_event_conf_changed() take in a config_line_t instead
4342 of a smartlist of alternating key/value entries. Fixes bug 31531;
4343 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
4345 o Minor bugfixes (configuration):
4346 - Check for multiplication overflow when parsing memory units inside
4347 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
4348 - When dumping the configuration, stop adding a trailing space after
4349 the option name when there is no option value. This issue only
4350 affects options that accept an empty value or list. (Most options
4351 reject empty values, or delete the entire line from the dumped
4352 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
4353 - Avoid changing the user's value of HardwareAccel as stored by
4354 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
4355 bug 32382; bugfix on 0.2.2.1-alpha.
4356 - When creating a KeyDirectory with the same location as the
4357 DataDirectory (not recommended), respect the DataDirectory's
4358 group-readable setting if one has not been set for the
4359 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
4361 o Minor bugfixes (controller):
4362 - In routerstatus_has_changed(), check all the fields that are
4363 output over the control port. Fixes bug 20218; bugfix
4366 o Minor bugfixes (correctness checks):
4367 - Use GCC/Clang's printf-checking feature to make sure that
4368 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4369 bugfix on 0.4.1.1-alpha.
4371 o Minor bugfixes (developer tools):
4372 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
4373 31336; bugfix on 0.4.1.2-alpha.
4375 o Minor bugfixes (dirauth module):
4376 - Split the dirauth config code into a separate file in the dirauth
4377 module. Disable this code when the dirauth module is disabled.
4378 Closes ticket 32213.
4379 - When the dirauth module is disabled, reject attempts to set the
4380 AuthoritativeDir option, rather than ignoring the value of the
4381 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
4383 o Minor bugfixes (embedded Tor):
4384 - When starting Tor any time after the first time in a process,
4385 register the thread in which it is running as the main thread.
4386 Previously, we only did this on Windows, which could lead to bugs
4387 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
4390 o Minor bugfixes (git scripts):
4391 - Avoid sleeping before the last push in git-push-all.sh. Closes
4393 - Forward all unrecognised arguments in git-push-all.sh to git push.
4394 Closes ticket 32216.
4396 o Minor bugfixes (hidden service v3):
4397 - Do not rely on a "circuit established" flag for intro circuits but
4398 instead always query the HS circuit map. This is to avoid sync
4399 issue with that flag and the map. Fixes bug 32094; bugfix
4402 o Minor bugfixes (logging, crash):
4403 - Avoid a possible crash when trying to log a (fatal) assertion
4404 failure about mismatched magic numbers in configuration objects.
4405 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4407 o Minor bugfixes (onion service v2):
4408 - When sending the INTRO cell for a v2 Onion Service, look at the
4409 failure cache alongside timeout values to check if the intro point
4410 is marked as failed. Previously, we only looked at the relay
4411 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
4414 o Minor bugfixes (onion services v3, client):
4415 - Properly handle the client rendezvous circuit timeout. Previously
4416 Tor would sometimes timeout a rendezvous circuit awaiting the
4417 introduction ACK, and find itself unable to re-establish all
4418 circuits because the rendezvous circuit timed out too early. Fixes
4419 bug 32021; bugfix on 0.3.2.1-alpha.
4421 o Minor bugfixes (onion services):
4422 - In cancel_descriptor_fetches(), use
4423 connection_list_by_type_purpose() instead of
4424 connection_list_by_type_state(). Fixes bug 32639; bugfix on
4425 0.3.2.1-alpha. Patch by Neel Chauhan.
4427 o Minor bugfixes (scripts):
4428 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
4429 bugfix on 0.4.0.1-alpha.
4431 o Minor bugfixes (test):
4432 - Use the same code to find the tor binary in all of our test
4433 scripts. This change makes sure we are always using the coverage
4434 binary when coverage is enabled. Fixes bug 32368; bugfix
4437 o Minor bugfixes (testing):
4438 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
4439 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
4440 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4441 test_practracker.sh script. Doing so caused a test failure. Fixes
4442 bug 32705; bugfix on 0.4.2.1-alpha.
4443 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4444 skipping practracker checks. Fixes bug 32705; bugfix
4447 o Minor bugfixes (tests):
4448 - Our option-validation tests no longer depend on specially
4449 configured non-default, non-passing sets of options. Previously,
4450 the tests had been written to assume that options would _not_ be
4451 set to their defaults, which led to needless complexity and
4452 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
4454 o Minor bugfixes (windows service):
4455 - Initialize the publish/subscribe system when running as a windows
4456 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4458 o Deprecated features:
4459 - Deprecate the ClientAutoIPv6ORPort option. This option was not
4460 true "Happy Eyeballs", and often failed on connections that
4461 weren't reliably dual-stack. Closes ticket 32942. Patch by
4465 - Provide a quickstart guide for a Circuit Padding Framework, and
4466 documentation for researchers to implement and study circuit
4467 padding machines. Closes ticket 28804.
4468 - Add documentation in 'HelpfulTools.md' to describe how to build a
4469 tag file. Closes ticket 32779.
4470 - Create a high-level description of the long-term software
4471 architecture goals. Closes ticket 32206.
4472 - Describe the --dump-config command in the manual page. Closes
4474 - Unite coding advice from this_not_that.md in torguts repo into our
4475 coding standards document. Resolves ticket 31853.
4478 - Our Doxygen configuration no longer generates LaTeX output. The
4479 reference manual produced by doing this was over 4000 pages long,
4480 and generally unusable. Closes ticket 32099.
4481 - The option "TestingEstimatedDescriptorPropagationTime" is now
4482 marked as obsolete. It has had no effect since 0.3.0.7, when
4483 clients stopped rejecting consensuses "from the future". Closes
4485 - We no longer support consensus methods before method 28; these
4486 methods were only used by authorities running versions of Tor that
4487 are now at end-of-life. In effect, this means that clients,
4488 relays, and authorities now assume that authorities will be
4489 running version 0.3.5.x or later. Closes ticket 32695.
4492 - Add more test cases for tor's UTF-8 validation function. Also,
4493 check the arguments passed to the function for consistency. Closes
4495 - Improve test coverage for relay and dirauth config code, focusing
4496 on option validation and normalization. Closes ticket 32213.
4497 - Improve the consistency of test_parseconf.sh output, and run all
4498 the tests, even if one fails. Closes ticket 32213.
4499 - Re-enable the Travis CI macOS Chutney build, but don't let it
4500 prevent the Travis job from finishing. (The Travis macOS jobs are
4501 slow, so we don't want to have it delay the whole CI process.)
4502 Closes ticket 32629.
4503 - Run the practracker unit tests in the pre-commit git hook. Closes
4505 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4506 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4507 fix the sandbox errors in 32722. Closes ticket 32240.
4509 o Code simplification and refactoring (channel):
4510 - Channel layer had a variable length cell handler that was not used
4511 and thus removed. Closes ticket 32892.
4513 o Code simplification and refactoring (configuration):
4514 - Immutability is now implemented as a flag on individual
4515 configuration options rather than as part of the option-transition
4516 checking code. Closes ticket 32344.
4517 - Instead of keeping a list of configuration options to check for
4518 relative paths, check all the options whose type is "FILENAME".
4519 Solves part of ticket 32339.
4520 - Our default log (which ordinarily sends NOTICE-level messages to
4521 standard output) is now handled in a more logical manner.
4522 Previously, we replaced the configured log options if they were
4523 empty. Now, we interpret an empty set of log options as meaning
4524 "use the default log". Closes ticket 31999.
4525 - Remove some unused arguments from the options_validate() function,
4526 to simplify our code and tests. Closes ticket 32187.
4527 - Simplify the options_validate() code so that it looks at the
4528 default options directly, rather than taking default options as an
4529 argument. This change lets us simplify its interface. Closes
4531 - Use our new configuration architecture to move most authority-
4532 related options to the directory authority module. Closes
4534 - When parsing the command line, handle options that determine our
4535 "quiet level" and our mode of operation (e.g., --dump-config and
4536 so on) all in one table. Closes ticket 32003.
4538 o Code simplification and refactoring (controller):
4539 - Create a new abstraction for formatting control protocol reply
4540 lines based on key-value pairs. Refactor some existing control
4541 protocol code to take advantage of this. Closes ticket 30984.
4542 - Create a helper function that can fetch network status or
4543 microdesc consensuses. Closes ticket 31684.
4545 o Code simplification and refactoring (dirauth modularization):
4546 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
4547 Closes ticket 32163.
4548 - Replace some confusing identifiers in process_descs.c. Closes
4550 - Simplify some relay and dirauth config code. Closes ticket 32213.
4552 o Code simplification and refactoring (misc):
4553 - Make all the structs we declare follow the same naming convention
4554 of ending with "_t". Closes ticket 32415.
4555 - Move and rename some configuration-related code for clarity.
4556 Closes ticket 32304.
4557 - Our include.am files are now broken up by subdirectory.
4558 Previously, src/core/include.am covered all of the subdirectories
4559 in "core", "feature", and "app". Closes ticket 32137.
4560 - Remove underused NS*() macros from test code: they make our tests
4561 more confusing, especially for code-formatting tools. Closes
4564 o Code simplification and refactoring (relay modularization):
4565 - Disable relay_periodic when the relay module is disabled. Closes
4567 - Disable relay_sys when the relay module is disabled. Closes
4570 o Code simplification and refactoring (tool support):
4571 - Add numerous missing dependencies to our include files, so that
4572 they can be included in different reasonable orders and still
4573 compile. Addresses part of ticket 32764.
4574 - Fix some parts of our code that were difficult for Coccinelle to
4575 parse. Related to ticket 31705.
4576 - Fix some small issues in our code that prevented automatic
4577 formatting tools from working. Addresses part of ticket 32764.
4579 o Documentation (manpage):
4580 - Alphabetize the Client Options section of the tor manpage. Closes
4582 - Alphabetize the General Options section of the tor manpage. Closes
4584 - In the tor(1) manpage, reword and improve formatting of the
4585 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
4586 32277. Based on work by Swati Thacker as part of Google Season
4588 - In the tor(1) manpage, reword and improve formatting of the FILES,
4589 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
4590 Swati Thacker as part of Google Season of Docs.
4592 o Testing (circuit, EWMA):
4593 - Add unit tests for circuitmux and EWMA subsystems. Closes
4596 o Testing (continuous integration):
4597 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4600 Changes in version 0.4.2.5 - 2019-12-09
4601 This is the first stable release in the 0.4.2.x series. This series
4602 improves reliability and stability, and includes several stability and
4603 correctness improvements for onion services. It also fixes many smaller
4604 bugs present in previous series.
4606 Per our support policy, we will support the 0.4.2.x series for nine
4607 months, or until three months after the release of a stable 0.4.3.x:
4608 whichever is longer. If you need longer-term support, please stick
4609 with 0.3.5.x, which will we plan to support until Feb 2022.
4611 Per our support policy, we will support the 0.4.2.x series for nine
4612 months, or until three months after the release of a stable 0.4.3.x:
4613 whichever is longer. If you need longer-term support, please stick
4614 with 0.3.5.x, which will we plan to support until Feb 2022.
4616 Below are the changes since 0.4.1.4-rc. For a complete list of changes
4617 since 0.4.1.5, see the ReleaseNotes file.
4619 o Minor features (geoip):
4620 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4621 Country database. Closes ticket 32685.
4624 - Require C99 standards-conforming code in Travis CI, but allow GNU
4625 gcc extensions. Also activates clang's -Wtypedef-redefinition
4626 warnings. Build some jobs with -std=gnu99, and some jobs without.
4627 Closes ticket 32500.
4630 Changes in version 0.4.1.7 - 2019-12-09
4631 This release backports several bugfixes to improve stability and
4632 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
4633 including all relays relying on AccountingMax, should upgrade.
4635 o Major features (directory authorities, backport from 0.4.2.2-alpha):
4636 - Directory authorities now reject relays running all currently
4637 deprecated release series. The currently supported release series
4638 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4640 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
4641 - Avoid a possible crash when restarting Tor in embedded mode and
4642 enabling a different set of publish/subscribe messages. Fixes bug
4643 31898; bugfix on 0.4.1.1-alpha.
4645 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4646 - Relays now respect their AccountingMax bandwidth again. When
4647 relays entered "soft" hibernation (which typically starts when
4648 we've hit 90% of our AccountingMax), we had stopped checking
4649 whether we should enter hard hibernation. Soft hibernation refuses
4650 new connections and new circuits, but the existing circuits can
4651 continue, meaning that relays could have exceeded their configured
4652 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4654 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4655 - Stop ignoring torrc options after an %include directive, when the
4656 included directory ends with a file that does not contain any
4657 config options (but does contain comments or whitespace). Fixes
4658 bug 31408; bugfix on 0.3.1.1-alpha.
4660 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4661 - Onion services now always use the exact number of intro points
4662 configured with the HiddenServiceNumIntroductionPoints option (or
4663 fewer if nodes are excluded). Before, a service could sometimes
4664 pick more intro points than configured. Fixes bug 31548; bugfix
4667 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4668 - When building on Appveyor and Travis, pass the "-k" flag to make,
4669 so that we are informed of all compilation failures, not just the
4670 first one or two. Closes ticket 31372.
4672 o Minor features (geoip, backport from 0.4.2.5):
4673 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4674 Country database. Closes ticket 32685.
4676 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4677 - Avoid spurious errors when Appveyor CI fails before the install step.
4678 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4680 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4681 - Fix a BUG() assertion that occurs within a very small race window
4682 between when a client intro circuit opens and when its descriptor
4683 gets cleaned up from the cache. The circuit is now closed early,
4684 which will trigger a re-fetch of the descriptor and continue the
4685 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4687 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4688 - Avoid trying to read data from closed connections, which can cause
4689 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4690 30344; bugfix on 0.1.1.1-alpha.
4692 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4693 - On abort, try harder to flush the output buffers of log messages.
4694 On some platforms (macOS), log messages could be discarded when
4695 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4696 - Report the tor version whenever an assertion fails. Previously, we
4697 only reported the Tor version on some crashes, and some non-fatal
4698 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4699 - When tor aborts due to an error, close log file descriptors before
4700 aborting. Closing the logs makes some OSes flush log file buffers,
4701 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4704 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4705 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4706 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4707 - Disable backtrace signal handlers when shutting down tor. Fixes
4708 bug 31614; bugfix on 0.2.5.2-alpha.
4709 - Rate-limit our the logging message about the obsolete .exit
4710 notation. Previously, there was no limit on this warning, which
4711 could potentially be triggered many times by a hostile website.
4712 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4714 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4715 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4716 cell on a connection using the obsolete v1 link protocol. Log a
4717 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4719 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4720 - Reset the periodic events' "enabled" flag when Tor is shut down
4721 cleanly. Previously, this flag was left on, which caused periodic
4722 events not to be re-enabled when Tor was relaunched in-process
4723 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4726 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
4727 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4728 31736; bugfix on 0.0.7.
4730 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
4731 - Remove overly strict assertions that triggered when a pluggable
4732 transport failed to launch. Fixes bug 31091; bugfix
4734 - Remove an assertion in the Unix process backend. This assertion
4735 would trigger when we failed to find the executable for a child
4736 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4738 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4739 - Avoid crashing when starting with a corrupt keys directory where
4740 the old ntor key and the new ntor key are identical. Fixes bug
4741 30916; bugfix on 0.2.4.8-alpha.
4743 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4744 - When testing port rebinding, don't busy-wait for tor to log.
4745 Instead, actually sleep for a short time before polling again.
4746 Also improve the formatting of control commands and log messages.
4747 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4749 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
4750 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4751 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4753 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4754 - Log bugs about the TLS read buffer's length only once, rather than
4755 filling the logs with similar warnings. Fixes bug 31939; bugfix
4758 o Documentation (backport from 0.4.2.2-alpha):
4759 - Explain why we can't destroy the backtrace buffer mutex. Explain
4760 why we don't need to destroy the log mutex. Closes ticket 31736.
4762 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4763 - Disable all but one Travis CI macOS build, to mitigate slow
4764 scheduling of Travis macOS jobs. Closes ticket 32177.
4765 - Run the chutney IPv6 networks as part of Travis CI. Closes
4767 - Simplify the Travis CI build matrix, and optimise for build time.
4768 Closes ticket 31859.
4769 - Use Windows Server 2019 instead of Windows Server 2016 in our
4770 Appveyor builds. Closes ticket 32086.
4772 o Testing (continuous integration, backport from 0.4.2.4-rc):
4773 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4774 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4775 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4776 until we can fix some Bionic permissions issues (see ticket
4777 32240). Related to ticket 31919.
4778 - Install the mingw OpenSSL package in Appveyor. This makes sure
4779 that the OpenSSL headers and libraries match in Tor's Appveyor
4780 builds. (This bug was triggered by an Appveyor image update.)
4781 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4783 o Testing (continuous integration, backport from 0.4.2.5):
4784 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4785 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4786 Build some jobs with -std=gnu99, and some jobs without.
4787 Closes ticket 32500.
4790 Changes in version 0.4.0.6 - 2019-12-09
4791 This is the second stable release in the 0.4.0.x series. This release
4792 backports several bugfixes to improve stability and correctness. Anyone
4793 experiencing build problems or crashes with 0.4.0.5, including all relays
4794 relying on AccountingMax, should upgrade.
4796 Note that, per our support policy, support for the 0.4.0.x series will end
4797 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
4798 latest stable release, or downgrade to 0.3.5.x, which will get long-term
4799 support until 1 Feb 2022.
4801 o Directory authority changes (backport from 0.4.1.5):
4802 - The directory authority "dizum" has a new IP address. Closes
4805 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
4806 - Consider our directory information to have changed when our list
4807 of bridges changes. Previously, Tor would not re-compute the
4808 status of its directory information when bridges changed, and
4809 therefore would not realize that it was no longer able to build
4810 circuits. Fixes part of bug 29875.
4811 - Do not count previously configured working bridges towards our
4812 total of working bridges. Previously, when Tor's list of bridges
4813 changed, it would think that the old bridges were still usable,
4814 and delay fetching router descriptors for the new ones. Fixes part
4815 of bug 29875; bugfix on 0.3.0.1-alpha.
4817 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
4818 - When considering upgrading circuits from "waiting for guard" to
4819 "open", always ignore circuits that are marked for close. Otherwise,
4820 we can end up in the situation where a subsystem is notified that
4821 a closing circuit has just opened, leading to undesirable
4822 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
4824 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
4825 - Properly clean up the introduction point map when circuits change
4826 purpose from onion service circuits to pathbias, measurement, or
4827 other circuit types. This should fix some service-side instances
4828 of introduction point failure. Fixes bug 29034; bugfix
4831 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
4832 - Fix an unreachable bug in which an introduction point could try to
4833 send an INTRODUCE_ACK with a status code that Trunnel would refuse
4834 to encode, leading the relay to assert(). We've consolidated the
4835 ABI values into Trunnel now. Fixes bug 30454; bugfix
4837 - Clients can now handle unknown status codes from INTRODUCE_ACK
4838 cells. (The NACK behavior will stay the same.) This will allow us
4839 to extend status codes in the future without breaking the normal
4840 client behavior. Fixes another part of bug 30454; bugfix
4843 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4844 - Relays now respect their AccountingMax bandwidth again. When
4845 relays entered "soft" hibernation (which typically starts when
4846 we've hit 90% of our AccountingMax), we had stopped checking
4847 whether we should enter hard hibernation. Soft hibernation refuses
4848 new connections and new circuits, but the existing circuits can
4849 continue, meaning that relays could have exceeded their configured
4850 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4852 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4853 - Stop ignoring torrc options after an %include directive, when the
4854 included directory ends with a file that does not contain any
4855 config options (but does contain comments or whitespace). Fixes
4856 bug 31408; bugfix on 0.3.1.1-alpha.
4858 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4859 - Onion services now always use the exact number of intro points
4860 configured with the HiddenServiceNumIntroductionPoints option (or
4861 fewer if nodes are excluded). Before, a service could sometimes
4862 pick more intro points than configured. Fixes bug 31548; bugfix
4865 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
4866 - Add a "--list-modules" command to print a list of which compile-
4867 time modules are enabled. Closes ticket 30452.
4869 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
4870 - Remove sudo configuration lines from .travis.yml as they are no
4871 longer needed with current Travis build environment. Resolves
4874 o Minor features (continuous integration, backport from 0.4.1.4-rc):
4875 - Our Travis configuration now uses Chutney to run some network
4876 integration tests automatically. Closes ticket 29280.
4878 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4879 - When building on Appveyor and Travis, pass the "-k" flag to make,
4880 so that we are informed of all compilation failures, not just the
4881 first one or two. Closes ticket 31372.
4883 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4884 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4885 in December 2018 (of which ~122 were still functional), with a
4886 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4887 in June 2019. Closes ticket 28795.
4889 o Minor features (geoip, backport from 0.4.2.5):
4890 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4891 Country database. Closes ticket 32685.
4893 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4894 - Change "make test-stem" so it only runs the stem tests that use
4895 tor. This change makes test-stem faster and more reliable. Closes
4898 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4899 - Avoid spurious errors when Appveyor CI fails before the install step.
4900 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4902 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4903 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4904 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4906 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
4907 - Fix a logic error that prevented the SessionGroup sub-option from
4908 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
4910 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
4911 - On relays, properly check that a padding machine is absent before
4912 logging a warning about it being absent. Fixes bug 30649; bugfix
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 (clock skew detection, backport from 0.4.1.5):
4923 - Don't believe clock skew results from NETINFO cells that appear to
4924 arrive before we sent the VERSIONS cells they are responding to.
4925 Previously, we would accept them up to 3 minutes "in the past".
4926 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4928 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
4929 - Fix a compilation warning on Windows about casting a function
4930 pointer for GetTickCount64(). Fixes bug 31374; bugfix
4933 o Minor bugfixes (compilation, backport from 0.4.1.5):
4934 - Avoid using labs() on time_t, which can cause compilation warnings
4935 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4937 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4938 - Suppress spurious float-conversion warnings from GCC when calling
4939 floating-point classifier functions on FreeBSD. Fixes part of bug
4940 31687; bugfix on 0.3.1.5-alpha.
4942 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
4943 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
4944 due to missing declarations of abort(), and prevent other such
4945 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
4947 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
4948 - Fix a bug that prevented us from supporting SOCKS5 proxies that
4949 want authentication along with configured (but unused!)
4950 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
4952 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4953 - Avoid trying to read data from closed connections, which can cause
4954 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4955 30344; bugfix on 0.1.1.1-alpha.
4957 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
4958 - Allow the test-stem job to fail in Travis, because it sometimes
4959 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
4960 - Skip test_rebind on macOS in Travis, because it is unreliable on
4961 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4962 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
4963 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4965 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
4966 - Avoid a set of possible code paths that could try to use freed
4967 memory in routerlist_free() while Tor was exiting. Fixes bug
4968 31003; bugfix on 0.1.2.2-alpha.
4970 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
4971 - Stop crashing after parsing an unknown descriptor purpose
4972 annotation. We think this bug can only be triggered by modifying a
4973 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
4975 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
4976 - Move the "bandwidth-file-headers" line in directory authority
4977 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
4980 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4981 - On abort, try harder to flush the output buffers of log messages.
4982 On some platforms (macOS), log messages could be discarded when
4983 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4984 - Report the tor version whenever an assertion fails. Previously, we
4985 only reported the Tor version on some crashes, and some non-fatal
4986 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4988 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4989 - When extracting an IPv6 address from a PF-based proxy, verify that
4990 we are actually configured to receive an IPv6 address, and log an
4991 internal error if not. Fixes part of bug 31687; bugfix
4994 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4995 - When tor is missing descriptors for some primary entry guards,
4996 make the log message less alarming. It's normal for descriptors to
4997 expire, as long as tor fetches new ones soon after. Fixes bug
4998 31657; bugfix on 0.3.3.1-alpha.
5000 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5001 - Do not log a warning when running with an OpenSSL version other
5002 than the one Tor was compiled with, if the two versions should be
5003 compatible. Previously, we would warn whenever the version was
5004 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5006 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5007 - Change log level of message "Hash of session info was not as
5008 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5011 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5012 - Rate-limit our the logging message about the obsolete .exit
5013 notation. Previously, there was no limit on this warning, which
5014 could potentially be triggered many times by a hostile website.
5015 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5017 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5018 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5019 cell on a connection using the obsolete v1 link protocol. Log a
5020 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5022 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5023 - Reset the periodic events' "enabled" flag when Tor is shut down
5024 cleanly. Previously, this flag was left on, which caused periodic
5025 events not to be re-enabled when Tor was relaunched in-process
5026 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5029 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5030 - Avoid a minor memory leak that could occur on relays when failing
5031 to create a "keys" directory. Fixes bug 30148; bugfix
5034 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5035 - Fix a trivial memory leak when parsing an invalid value
5036 from a download schedule in the configuration. Fixes bug
5037 30894; bugfix on 0.3.4.1-alpha.
5039 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
5040 - Fix usage of minherit() on NetBSD and other platforms that define
5041 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
5042 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
5044 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5045 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5046 implemenation) when failing to load an onion service client
5047 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5049 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5050 - When purging the DNS cache because of an out-of-memory condition,
5051 try purging just the older entries at first. Previously, we would
5052 always purge the whole thing. Fixes bug 29617; bugfix
5055 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5056 - Avoid crashing in our tor_vasprintf() implementation on systems
5057 that define neither vasprintf() nor _vscprintf(). (This bug has
5058 been here long enough that we question whether people are running
5059 Tor on such systems, but we're applying the fix out of caution.)
5060 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5063 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
5064 - Remove overly strict assertions that triggered when a pluggable
5065 transport failed to launch. Fixes bug 31091; bugfix
5067 - Remove an assertion in the Unix process backend. This assertion
5068 would trigger when we failed to find the executable for a child
5069 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5071 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5072 - Avoid crashing when starting with a corrupt keys directory where
5073 the old ntor key and the new ntor key are identical. Fixes bug
5074 30916; bugfix on 0.2.4.8-alpha.
5076 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5077 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5078 31463; bugfix on 0.3.5.4-alpha.
5080 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5081 - When testing port rebinding, don't busy-wait for tor to log.
5082 Instead, actually sleep for a short time before polling again.
5083 Also improve the formatting of control commands and log messages.
5084 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5086 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5087 - Log bugs about the TLS read buffer's length only once, rather than
5088 filling the logs with similar warnings. Fixes bug 31939; bugfix
5091 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5092 - Always retry v2 single onion service intro and rend circuits with
5093 a 3-hop path. Previously, v2 single onion services used a 3-hop
5094 path when rendezvous circuits were retried after a remote or
5095 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5096 23818; bugfix on 0.2.9.3-alpha.
5097 - Make v3 single onion services fall back to a 3-hop intro, when all
5098 intro points are unreachable via a 1-hop path. Previously, v3
5099 single onion services failed when all intro nodes were unreachable
5100 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5102 o Documentation (backport from 0.4.2.1-alpha):
5103 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5104 notice.html so that operators no longer have to host it
5105 themselves. Closes ticket 31089.
5107 o Testing (backport from 0.4.1.2-alpha):
5108 - Specify torrc paths (with empty files) when launching tor in
5109 integration tests; refrain from reading user and system torrcs.
5110 Resolves issue 29702.
5112 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5113 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5115 o Testing (continuous integration, backport from 0.4.1.5):
5116 - In Travis, make stem log a controller trace to the console, and
5117 tail stem's tor log after failure. Closes ticket 30591.
5118 - In Travis, only run the stem tests that use a tor binary. Closes
5121 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5122 - Disable all but one Travis CI macOS build, to mitigate slow
5123 scheduling of Travis macOS jobs. Closes ticket 32177.
5124 - Run the chutney IPv6 networks as part of Travis CI. Closes
5126 - Simplify the Travis CI build matrix, and optimise for build time.
5127 Closes ticket 31859.
5128 - Use Windows Server 2019 instead of Windows Server 2016 in our
5129 Appveyor builds. Closes ticket 32086.
5131 o Testing (continuous integration, backport from 0.4.2.4-rc):
5132 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5133 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5134 until we can fix some Bionic permissions issues (see ticket
5135 32240). Related to ticket 31919.
5136 - Install the mingw OpenSSL package in Appveyor. This makes sure
5137 that the OpenSSL headers and libraries match in Tor's Appveyor
5138 builds. (This bug was triggered by an Appveyor image update.)
5139 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5140 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5142 o Testing (continuous integration, backport from 0.4.2.5):
5143 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5144 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5145 Build some jobs with -std=gnu99, and some jobs without.
5146 Closes ticket 32500.
5148 Changes in version 0.3.5.9 - 2019-12-09
5149 Tor 0.3.5.9 backports serveral fixes from later releases, including
5150 several that affect bridge users, relay stability, onion services,
5153 o Directory authority changes (backport from 0.4.1.5):
5154 - The directory authority "dizum" has a new IP address. Closes
5157 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
5158 - Consider our directory information to have changed when our list
5159 of bridges changes. Previously, Tor would not re-compute the
5160 status of its directory information when bridges changed, and
5161 therefore would not realize that it was no longer able to build
5162 circuits. Fixes part of bug 29875.
5163 - Do not count previously configured working bridges towards our
5164 total of working bridges. Previously, when Tor's list of bridges
5165 changed, it would think that the old bridges were still usable,
5166 and delay fetching router descriptors for the new ones. Fixes part
5167 of bug 29875; bugfix on 0.3.0.1-alpha.
5169 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
5170 - When considering upgrading circuits from "waiting for guard" to
5171 "open", always ignore circuits that are marked for close. Otherwise,
5172 we can end up in the situation where a subsystem is notified that
5173 a closing circuit has just opened, leading to undesirable
5174 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5176 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
5177 - When running with NSS, disable TLS 1.2 ciphersuites that use
5178 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5179 these ciphersuites don't work -- which caused relays to fail to
5180 handshake with one another when these ciphersuites were enabled.
5181 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5183 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
5184 - Properly clean up the introduction point map when circuits change
5185 purpose from onion service circuits to pathbias, measurement, or
5186 other circuit types. This should fix some service-side instances
5187 of introduction point failure. Fixes bug 29034; bugfix
5190 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
5191 - Fix an unreachable bug in which an introduction point could try to
5192 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5193 to encode, leading the relay to assert(). We've consolidated the
5194 ABI values into Trunnel now. Fixes bug 30454; bugfix
5196 - Clients can now handle unknown status codes from INTRODUCE_ACK
5197 cells. (The NACK behavior will stay the same.) This will allow us
5198 to extend status codes in the future without breaking the normal
5199 client behavior. Fixes another part of bug 30454; bugfix
5202 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
5203 - Stop ignoring torrc options after an %include directive, when the
5204 included directory ends with a file that does not contain any
5205 config options (but does contain comments or whitespace). Fixes
5206 bug 31408; bugfix on 0.3.1.1-alpha.
5208 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
5209 - Onion services now always use the exact number of intro points
5210 configured with the HiddenServiceNumIntroductionPoints option (or
5211 fewer if nodes are excluded). Before, a service could sometimes
5212 pick more intro points than configured. Fixes bug 31548; bugfix
5215 o Minor features (address selection, backport from 0.4.0.3-alpha):
5216 - Treat the subnet 100.64.0.0/10 as public for some purposes;
5217 private for others. This subnet is the RFC 6598 (Carrier Grade
5218 NAT) IP range, and is deployed by many ISPs as an alternative to
5219 RFC 1918 that does not break existing internal networks. Tor now
5220 blocks SOCKS and control ports on these addresses and warns users
5221 if client ports or ExtORPorts are listening on a RFC 6598 address.
5222 Closes ticket 28525. Patch by Neel Chauhan.
5224 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
5225 - Make bandwidth authorities ignore relays that are reported in the
5226 bandwidth file with the flag "vote=0". This change allows us to
5227 report unmeasured relays for diagnostic reasons without including
5228 their bandwidth in the bandwidth authorities' vote. Closes
5231 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
5232 - Add a "--list-modules" command to print a list of which compile-
5233 time modules are enabled. Closes ticket 30452.
5235 o Minor features (continuous integration, backport from 0.4.0.4-rc):
5236 - On Travis Rust builds, cleanup Rust registry and refrain from
5237 caching the "target/" directory to speed up builds. Resolves
5240 o Minor features (continuous integration, backport from 0.4.0.5):
5241 - In Travis, tell timelimit to use stem's backtrace signals, and
5242 launch python directly from timelimit, so python receives the
5243 signals from timelimit, rather than make. Closes ticket 30117.
5245 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
5246 - Remove sudo configuration lines from .travis.yml as they are no
5247 longer needed with current Travis build environment. Resolves
5250 o Minor features (continuous integration, backport from 0.4.1.4-rc):
5251 - Our Travis configuration now uses Chutney to run some network
5252 integration tests automatically. Closes ticket 29280.
5254 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
5255 - When building on Appveyor and Travis, pass the "-k" flag to make,
5256 so that we are informed of all compilation failures, not just the
5257 first one or two. Closes ticket 31372.
5259 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
5260 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5261 in December 2018 (of which ~122 were still functional), with a
5262 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5263 in June 2019. Closes ticket 28795.
5265 o Minor features (geoip, backport from 0.4.2.5):
5266 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
5267 Country database. Closes ticket 32685.
5269 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
5270 - Try to log an error from NSS (if there is any) and a more useful
5271 description of our situation if we are using NSS and a call to
5272 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5274 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5275 - Change "make test-stem" so it only runs the stem tests that use
5276 tor. This change makes test-stem faster and more reliable. Closes
5279 o Minor bugfixes (security, backport from 0.4.0.4-rc):
5280 - Verify in more places that we are not about to create a buffer
5281 with more than INT_MAX bytes, to avoid possible OOB access in the
5282 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5283 fixed by Tobias Stoeckmann.
5284 - Fix a potential double free bug when reading huge bandwidth files.
5285 The issue is not exploitable in the current Tor network because
5286 the vulnerable code is only reached when directory authorities
5287 read bandwidth files, but bandwidth files come from a trusted
5288 source (usually the authorities themselves). Furthermore, the
5289 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5290 which are not used by any of the current authorities. Fixes bug
5291 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5294 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
5295 - Reset coverage state on disk after Travis CI has finished. This
5296 should prevent future coverage merge errors from causing the test
5297 suite for the "process" subsystem to fail. The process subsystem
5298 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5300 - Terminate test-stem if it takes more than 9.5 minutes to run.
5301 (Travis terminates the job after 10 minutes of no output.)
5302 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5304 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
5305 - Avoid spurious errors when Appveyor CI fails before the install step.
5306 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5308 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5309 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5310 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5312 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
5313 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5314 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5317 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
5318 - Fix a logic error that prevented the SessionGroup sub-option from
5319 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5321 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
5322 - Fix a BUG() assertion that occurs within a very small race window
5323 between when a client intro circuit opens and when its descriptor
5324 gets cleaned up from the cache. The circuit is now closed early,
5325 which will trigger a re-fetch of the descriptor and continue the
5326 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5328 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5329 - Don't believe clock skew results from NETINFO cells that appear to
5330 arrive before we sent the VERSIONS cells they are responding to.
5331 Previously, we would accept them up to 3 minutes "in the past".
5332 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5334 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5335 - Fix a compilation warning on Windows about casting a function
5336 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5339 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5340 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5341 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5343 o Minor bugfixes (compilation, backport from 0.4.1.5):
5344 - Avoid using labs() on time_t, which can cause compilation warnings
5345 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5347 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5348 - Suppress spurious float-conversion warnings from GCC when calling
5349 floating-point classifier functions on FreeBSD. Fixes part of bug
5350 31687; bugfix on 0.3.1.5-alpha.
5352 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5353 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5354 due to missing declarations of abort(), and prevent other such
5355 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5357 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5358 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5359 want authentication along with configured (but unused!)
5360 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5362 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5363 - Avoid trying to read data from closed connections, which can cause
5364 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5365 30344; bugfix on 0.1.1.1-alpha.
5367 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5368 - Allow the test-stem job to fail in Travis, because it sometimes
5369 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5370 - Skip test_rebind on macOS in Travis, because it is unreliable on
5371 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5372 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5373 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5375 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5376 - Avoid a set of possible code paths that could try to use freed
5377 memory in routerlist_free() while Tor was exiting. Fixes bug
5378 31003; bugfix on 0.1.2.2-alpha.
5380 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5381 - Stop crashing after parsing an unknown descriptor purpose
5382 annotation. We think this bug can only be triggered by modifying a
5383 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5385 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5386 - Move the "bandwidth-file-headers" line in directory authority
5387 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5390 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5391 - On abort, try harder to flush the output buffers of log messages.
5392 On some platforms (macOS), log messages could be discarded when
5393 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5394 - Report the tor version whenever an assertion fails. Previously, we
5395 only reported the Tor version on some crashes, and some non-fatal
5396 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5398 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5399 - When extracting an IPv6 address from a PF-based proxy, verify that
5400 we are actually configured to receive an IPv6 address, and log an
5401 internal error if not. Fixes part of bug 31687; bugfix
5404 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5405 - When tor is missing descriptors for some primary entry guards,
5406 make the log message less alarming. It's normal for descriptors to
5407 expire, as long as tor fetches new ones soon after. Fixes bug
5408 31657; bugfix on 0.3.3.1-alpha.
5410 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
5411 - Avoid logging that we are relaxing a circuit timeout when that
5412 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
5414 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
5415 - Correct a misleading error message when IPv4Only or IPv6Only is
5416 used but the resolved address can not be interpreted as an address
5417 of the specified IP version. Fixes bug 13221; bugfix on
5418 0.2.3.9-alpha. Patch from Kris Katterjohn.
5419 - Log the correct port number for listening sockets when "auto" is
5420 used to let Tor pick the port number. Previously, port 0 was
5421 logged instead of the actual port number. Fixes bug 29144; bugfix
5422 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5423 - Stop logging a BUG() warning when Tor is waiting for exit
5424 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5426 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5427 - Do not log a warning when running with an OpenSSL version other
5428 than the one Tor was compiled with, if the two versions should be
5429 compatible. Previously, we would warn whenever the version was
5430 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5432 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5433 - Change log level of message "Hash of session info was not as
5434 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5437 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5438 - Rate-limit our the logging message about the obsolete .exit
5439 notation. Previously, there was no limit on this warning, which
5440 could potentially be triggered many times by a hostile website.
5441 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5443 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5444 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5445 cell on a connection using the obsolete v1 link protocol. Log a
5446 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5448 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5449 - Reset the periodic events' "enabled" flag when Tor is shut down
5450 cleanly. Previously, this flag was left on, which caused periodic
5451 events not to be re-enabled when Tor was relaunched in-process
5452 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5455 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5456 - Avoid a minor memory leak that could occur on relays when failing
5457 to create a "keys" directory. Fixes bug 30148; bugfix
5460 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5461 - Fix a trivial memory leak when parsing an invalid value
5462 from a download schedule in the configuration. Fixes bug
5463 30894; bugfix on 0.3.4.1-alpha.
5465 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
5466 - Refactor the shared random state's memory management so that it
5467 actually takes ownership of the shared random value pointers.
5468 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5470 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
5471 - Stop leaking parts of the shared random state in the shared-random
5472 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5474 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5475 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5476 implemenation) when failing to load an onion service client
5477 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5479 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5480 - When purging the DNS cache because of an out-of-memory condition,
5481 try purging just the older entries at first. Previously, we would
5482 always purge the whole thing. Fixes bug 29617; bugfix
5485 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5486 - Avoid crashing in our tor_vasprintf() implementation on systems
5487 that define neither vasprintf() nor _vscprintf(). (This bug has
5488 been here long enough that we question whether people are running
5489 Tor on such systems, but we're applying the fix out of caution.)
5490 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5493 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5494 - Avoid crashing when starting with a corrupt keys directory where
5495 the old ntor key and the new ntor key are identical. Fixes bug
5496 30916; bugfix on 0.2.4.8-alpha.
5498 o Minor bugfixes (rust, backport from 0.4.0.5):
5499 - Abort on panic in all build profiles, instead of potentially
5500 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5502 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5503 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5504 31463; bugfix on 0.3.5.4-alpha.
5506 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
5507 - Allow connections to single onion services to remain idle without
5508 being disconnected. Previously, relays acting as rendezvous points
5509 for single onion services were mistakenly closing idle rendezvous
5510 circuits after 60 seconds, thinking that they were unused
5511 directory-fetching circuits that had served their purpose. Fixes
5512 bug 29665; bugfix on 0.2.1.26.
5514 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
5515 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5516 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5519 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
5520 - Downgrade some LOG_ERR messages in the address/* tests to
5521 warnings. The LOG_ERR messages were occurring when we had no
5522 configured network. We were failing the unit tests, because we
5523 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5524 29530; bugfix on 0.3.5.8.
5525 - Fix our gcov wrapper script to look for object files at the
5526 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5528 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
5529 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5530 recent test-network.sh to use new chutney features in CI. Fixes
5531 bug 29703; bugfix on 0.2.9.1-alpha.
5532 - Fix a test failure on Windows caused by an unexpected "BUG"
5533 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5536 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5537 - When testing port rebinding, don't busy-wait for tor to log.
5538 Instead, actually sleep for a short time before polling again.
5539 Also improve the formatting of control commands and log messages.
5540 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5542 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
5543 - When classifying a client's selection of TLS ciphers, if the
5544 client ciphers are not yet available, do not cache the result.
5545 Previously, we had cached the unavailability of the cipher list
5546 and never looked again, which in turn led us to assume that the
5547 client only supported the ancient V1 link protocol. This, in turn,
5548 was causing Stem integration tests to stall in some cases. Fixes
5549 bug 30021; bugfix on 0.2.4.8-alpha.
5551 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5552 - Log bugs about the TLS read buffer's length only once, rather than
5553 filling the logs with similar warnings. Fixes bug 31939; bugfix
5556 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5557 - Always retry v2 single onion service intro and rend circuits with
5558 a 3-hop path. Previously, v2 single onion services used a 3-hop
5559 path when rendezvous circuits were retried after a remote or
5560 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5561 23818; bugfix on 0.2.9.3-alpha.
5562 - Make v3 single onion services fall back to a 3-hop intro, when all
5563 intro points are unreachable via a 1-hop path. Previously, v3
5564 single onion services failed when all intro nodes were unreachable
5565 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5567 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
5568 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5569 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5570 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5571 fast_finish, so failed jobs terminate the build immediately. Fixes
5572 bug 29601; bugfix on 0.3.5.4-alpha.
5574 o Documentation (backport from 0.4.2.1-alpha):
5575 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5576 notice.html so that operators no longer have to host it
5577 themselves. Closes ticket 31089.
5579 o Testing (backport from 0.4.1.2-alpha):
5580 - Specify torrc paths (with empty files) when launching tor in
5581 integration tests; refrain from reading user and system torrcs.
5582 Resolves issue 29702.
5584 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5585 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5587 o Testing (continuous integration, backport from 0.4.1.5):
5588 - In Travis, make stem log a controller trace to the console, and
5589 tail stem's tor log after failure. Closes ticket 30591.
5590 - In Travis, only run the stem tests that use a tor binary. Closes
5593 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5594 - Disable all but one Travis CI macOS build, to mitigate slow
5595 scheduling of Travis macOS jobs. Closes ticket 32177.
5596 - Run the chutney IPv6 networks as part of Travis CI. Closes
5598 - Simplify the Travis CI build matrix, and optimise for build time.
5599 Closes ticket 31859.
5600 - Use Windows Server 2019 instead of Windows Server 2016 in our
5601 Appveyor builds. Closes ticket 32086.
5603 o Testing (continuous integration, backport from 0.4.2.4-rc):
5604 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5605 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5606 until we can fix some Bionic permissions issues (see ticket
5607 32240). Related to ticket 31919.
5608 - Install the mingw OpenSSL package in Appveyor. This makes sure
5609 that the OpenSSL headers and libraries match in Tor's Appveyor
5610 builds. (This bug was triggered by an Appveyor image update.)
5611 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5612 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5614 o Testing (continuous integration, backport from 0.4.2.5):
5615 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5616 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5617 Build some jobs with -std=gnu99, and some jobs without.
5618 Closes ticket 32500.
5620 Changes in version 0.4.2.4-rc - 2019-11-15
5621 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
5622 several bugs from earlier versions, including a few that would result in
5623 stack traces or incorrect behavior.
5625 o Minor features (build system):
5626 - Make pkg-config use --prefix when cross-compiling, if
5627 PKG_CONFIG_PATH is not set. Closes ticket 32191.
5629 o Minor features (geoip):
5630 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
5631 Country database. Closes ticket 32440.
5633 o Minor bugfixes (client, onion service v3):
5634 - Fix a BUG() assertion that occurs within a very small race window
5635 between when a client intro circuit opens and when its descriptor
5636 gets cleaned up from the cache. The circuit is now closed early,
5637 which will trigger a re-fetch of the descriptor and continue the
5638 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5640 o Minor bugfixes (code quality):
5641 - Fix "make check-includes" so it runs correctly on out-of-tree
5642 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
5644 o Minor bugfixes (configuration):
5645 - Log the option name when skipping an obsolete option. Fixes bug
5646 32295; bugfix on 0.4.2.1-alpha.
5648 o Minor bugfixes (crash):
5649 - When running Tor with an option like --verify-config or
5650 --dump-config that does not start the event loop, avoid crashing
5651 if we try to exit early because of an error. Fixes bug 32407;
5652 bugfix on 0.3.3.1-alpha.
5654 o Minor bugfixes (directory):
5655 - When checking if a directory connection is anonymous, test if the
5656 circuit was marked for close before looking at its channel. This
5657 avoids a BUG() stacktrace if the circuit was previously closed.
5658 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
5660 o Minor bugfixes (shellcheck):
5661 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
5662 32402; bugfix on 0.4.2.1-alpha.
5663 - Start checking most scripts for shellcheck errors again. Fixes bug
5664 32402; bugfix on 0.4.2.1-alpha.
5666 o Testing (continuous integration):
5667 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5668 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5669 until we can fix some Bionic permissions issues (see ticket
5670 32240). Related to ticket 31919.
5671 - Install the mingw OpenSSL package in Appveyor. This makes sure
5672 that the OpenSSL headers and libraries match in Tor's Appveyor
5673 builds. (This bug was triggered by an Appveyor image update.)
5674 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5675 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5678 Changes in version 0.4.2.3-alpha - 2019-10-24
5679 This release fixes several bugs from the previous alpha release, and
5680 from earlier versions of Tor.
5682 o Major bugfixes (relay):
5683 - Relays now respect their AccountingMax bandwidth again. When
5684 relays entered "soft" hibernation (which typically starts when
5685 we've hit 90% of our AccountingMax), we had stopped checking
5686 whether we should enter hard hibernation. Soft hibernation refuses
5687 new connections and new circuits, but the existing circuits can
5688 continue, meaning that relays could have exceeded their configured
5689 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5691 o Major bugfixes (v3 onion services):
5692 - Onion services now always use the exact number of intro points
5693 configured with the HiddenServiceNumIntroductionPoints option (or
5694 fewer if nodes are excluded). Before, a service could sometimes
5695 pick more intro points than configured. Fixes bug 31548; bugfix
5698 o Minor feature (onion services, control port):
5699 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
5700 (v3) onion services. Previously it defaulted to RSA1024 (v2).
5701 Closes ticket 29669.
5703 o Minor features (testing):
5704 - When running tests that attempt to look up hostnames, replace the
5705 libc name lookup functions with ones that do not actually touch
5706 the network. This way, the tests complete more quickly in the
5707 presence of a slow or missing DNS resolver. Closes ticket 31841.
5709 o Minor features (testing, continuous integration):
5710 - Disable all but one Travis CI macOS build, to mitigate slow
5711 scheduling of Travis macOS jobs. Closes ticket 32177.
5712 - Run the chutney IPv6 networks as part of Travis CI. Closes
5714 - Simplify the Travis CI build matrix, and optimise for build time.
5715 Closes ticket 31859.
5716 - Use Windows Server 2019 instead of Windows Server 2016 in our
5717 Appveyor builds. Closes ticket 32086.
5719 o Minor bugfixes (build system):
5720 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
5721 32124; bugfix on 0.3.4.1-alpha.
5722 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
5724 - Stop failing when jemalloc is requested, but tcmalloc is not
5725 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
5726 - When pkg-config is not installed, or a library that depends on
5727 pkg-config is not found, tell the user what to do to fix the
5728 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
5730 o Minor bugfixes (connections):
5731 - Avoid trying to read data from closed connections, which can cause
5732 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5733 30344; bugfix on 0.1.1.1-alpha.
5735 o Minor bugfixes (error handling):
5736 - Always lock the backtrace buffer before it is used. Fixes bug
5737 31734; bugfix on 0.2.5.3-alpha.
5739 o Minor bugfixes (mainloop, periodic events, in-process API):
5740 - Reset the periodic events' "enabled" flag when Tor is shut down
5741 cleanly. Previously, this flag was left on, which caused periodic
5742 events not to be re-enabled when Tor was relaunched in-process
5743 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5746 o Minor bugfixes (process management):
5747 - Remove overly strict assertions that triggered when a pluggable
5748 transport failed to launch. Fixes bug 31091; bugfix
5750 - Remove an assertion in the Unix process backend. This assertion
5751 would trigger when we failed to find the executable for a child
5752 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5754 o Minor bugfixes (testing):
5755 - Avoid intermittent test failures due to a test that had relied on
5756 inconsistent timing sources. Fixes bug 31995; bugfix
5758 - When testing port rebinding, don't busy-wait for tor to log.
5759 Instead, actually sleep for a short time before polling again.
5760 Also improve the formatting of control commands and log messages.
5761 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5763 o Minor bugfixes (tls, logging):
5764 - Log bugs about the TLS read buffer's length only once, rather than
5765 filling the logs with similar warnings. Fixes bug 31939; bugfix
5768 o Minor bugfixes (v3 onion services):
5769 - Fix an implicit conversion from ssize_t to size_t discovered by
5770 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
5771 - Fix a memory leak in an unlikely error code path when encoding HS
5772 DoS establish intro extension cell. Fixes bug 32063; bugfix
5774 - When cleaning up intro circuits for a v3 onion service, don't
5775 remove circuits that have an established or pending circuit, even
5776 if they ran out of retries. This way, we don't remove a circuit on
5777 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
5780 - Correct the description of "GuardLifetime". Fixes bug 31189;
5781 bugfix on 0.3.0.1-alpha.
5782 - Make clear in the man page, in both the bandwidth section and the
5783 AccountingMax section, that Tor counts in powers of two, not
5784 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
5785 bytes. Resolves ticket 32106.
5788 Changes in version 0.4.2.2-alpha - 2019-10-07
5789 This release fixes several bugs from the previous alpha release, and
5790 from earlier versions. It also includes a change in authorities, so
5791 that they begin to reject the currently unsupported release series.
5793 o Major features (directory authorities):
5794 - Directory authorities now reject relays running all currently
5795 deprecated release series. The currently supported release series
5796 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5798 o Major bugfixes (embedded Tor):
5799 - Avoid a possible crash when restarting Tor in embedded mode and
5800 enabling a different set of publish/subscribe messages. Fixes bug
5801 31898; bugfix on 0.4.1.1-alpha.
5803 o Major bugfixes (torrc parsing):
5804 - Stop ignoring torrc options after an %include directive, when the
5805 included directory ends with a file that does not contain any
5806 config options (but does contain comments or whitespace). Fixes
5807 bug 31408; bugfix on 0.3.1.1-alpha.
5809 o Minor features (auto-formatting scripts):
5810 - When annotating C macros, never generate a line that our check-
5811 spaces script would reject. Closes ticket 31759.
5812 - When annotating C macros, try to remove cases of double-negation.
5813 Closes ticket 31779.
5815 o Minor features (continuous integration):
5816 - When building on Appveyor and Travis, pass the "-k" flag to make,
5817 so that we are informed of all compilation failures, not just the
5818 first one or two. Closes ticket 31372.
5820 o Minor features (geoip):
5821 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
5822 Country database. Closes ticket 31931.
5824 o Minor features (maintenance scripts):
5825 - Add a Coccinelle script to detect bugs caused by incrementing or
5826 decrementing a variable inside a call to log_debug(). Since
5827 log_debug() is a macro whose arguments are conditionally
5828 evaluated, it is usually an error to do this. One such bug was
5829 30628, in which SENDME cells were miscounted by a decrement
5830 operator inside a log_debug() call. Closes ticket 30743.
5832 o Minor features (onion services v3):
5833 - Assist users who try to setup v2 client authorization in v3 onion
5834 services by pointing them to the right documentation. Closes
5837 o Minor bugfixes (Appveyor continuous integration):
5838 - Avoid spurious errors when Appveyor CI fails before the install
5839 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5841 o Minor bugfixes (best practices tracker):
5842 - When listing overbroad exceptions, do not also list problems, and
5843 do not list insufficiently broad exceptions. Fixes bug 31338;
5844 bugfix on 0.4.2.1-alpha.
5846 o Minor bugfixes (controller protocol):
5847 - Fix the MAPADDRESS controller command to accept one or more
5848 arguments. Previously, it required two or more arguments, and
5849 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5851 o Minor bugfixes (logging):
5852 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5853 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5854 - Disable backtrace signal handlers when shutting down tor. Fixes
5855 bug 31614; bugfix on 0.2.5.2-alpha.
5856 - Rate-limit our the logging message about the obsolete .exit
5857 notation. Previously, there was no limit on this warning, which
5858 could potentially be triggered many times by a hostile website.
5859 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5860 - When initialising log domain masks, only set known log domains.
5861 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
5863 o Minor bugfixes (logging, protocol violations):
5864 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5865 cell on a connection using the obsolete v1 link protocol. Log a
5866 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5868 o Minor bugfixes (modules):
5869 - Explain what the optional Directory Authority module is, and what
5870 happens when it is disabled. Fixes bug 31825; bugfix
5873 o Minor bugfixes (multithreading):
5874 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5875 31736; bugfix on 0.0.7.
5877 o Minor bugfixes (relay):
5878 - Avoid crashing when starting with a corrupt keys directory where
5879 the old ntor key and the new ntor key are identical. Fixes bug
5880 30916; bugfix on 0.2.4.8-alpha.
5882 o Minor bugfixes (tests, SunOS):
5883 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5884 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5886 o Code simplification and refactoring:
5887 - Refactor connection_control_process_inbuf() to reduce the size of
5888 a practracker exception. Closes ticket 31840.
5889 - Refactor the microdescs_parse_from_string() function into smaller
5890 pieces, for better comprehensibility. Closes ticket 31675.
5891 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
5892 tests and fuzzers, rather than using hard-coded values. Closes
5894 - Interface for function `decrypt_desc_layer` cleaned up. Closes
5898 - Document the signal-safe logging behaviour in the tor man page.
5899 Also add some comments to the relevant functions. Closes
5901 - Explain why we can't destroy the backtrace buffer mutex. Explain
5902 why we don't need to destroy the log mutex. Closes ticket 31736.
5903 - The Tor source code repository now includes a (somewhat dated)
5904 description of Tor's modular architecture, in doc/HACKING/design.
5905 This is based on the old "tor-guts.git" repository, which we are
5906 adopting and superseding. Closes ticket 31849.
5909 Changes in version 0.4.1.6 - 2019-09-19
5910 This release backports several bugfixes to improve stability and
5911 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
5912 or experiencing reliability issues with single onion services, should
5915 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
5916 - Tolerate systems (including some Android installations) where
5917 madvise and MADV_DONTDUMP are available at build-time, but not at
5918 run time. Previously, these systems would notice a failed syscall
5919 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
5920 - Tolerate systems (including some Linux installations) where
5921 madvise and/or MADV_DONTFORK are available at build-time, but not
5922 at run time. Previously, these systems would notice a failed
5923 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
5925 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5926 - Change "make test-stem" so it only runs the stem tests that use
5927 tor. This change makes test-stem faster and more reliable. Closes
5930 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5931 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5932 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5934 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5935 - Add more stub functions to fix compilation on Android with link-
5936 time optimization when --disable-module-dirauth is used.
5937 Previously, these compilation settings would make the compiler
5938 look for functions that didn't exist. Fixes bug 31552; bugfix
5940 - Suppress spurious float-conversion warnings from GCC when calling
5941 floating-point classifier functions on FreeBSD. Fixes part of bug
5942 31687; bugfix on 0.3.1.5-alpha.
5944 o Minor bugfixes (controller protocol):
5945 - Fix the MAPADDRESS controller command to accept one or more
5946 arguments. Previously, it required two or more arguments, and ignored
5947 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5949 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5950 - When extracting an IPv6 address from a PF-based proxy, verify that
5951 we are actually configured to receive an IPv6 address, and log an
5952 internal error if not. Fixes part of bug 31687; bugfix
5955 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5956 - When tor is missing descriptors for some primary entry guards,
5957 make the log message less alarming. It's normal for descriptors to
5958 expire, as long as tor fetches new ones soon after. Fixes bug
5959 31657; bugfix on 0.3.3.1-alpha.
5961 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5962 - Change log level of message "Hash of session info was not as
5963 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5966 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5967 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5968 31463; bugfix on 0.3.5.4-alpha.
5970 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5971 - Always retry v2 single onion service intro and rend circuits with
5972 a 3-hop path. Previously, v2 single onion services used a 3-hop
5973 path when rendezvous circuits were retried after a remote or
5974 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5975 23818; bugfix on 0.2.9.3-alpha.
5977 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
5978 - Always retry v3 single onion service intro and rend circuits with
5979 a 3-hop path. Previously, v3 single onion services used a 3-hop
5980 path when rend circuits were retried after a remote or delayed
5981 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
5982 bugfix on 0.3.2.1-alpha.
5983 - Make v3 single onion services fall back to a 3-hop intro, when all
5984 intro points are unreachable via a 1-hop path. Previously, v3
5985 single onion services failed when all intro nodes were unreachable
5986 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5988 o Documentation (backport from 0.4.2.1-alpha):
5989 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5990 notice.html so that operators no longer have to host it
5991 themselves. Closes ticket 31089.
5994 Changes in version 0.4.2.1-alpha - 2019-09-17
5995 This is the first alpha release in the 0.4.2.x series. It adds new
5996 defenses for denial-of-service attacks against onion services. It also
5997 includes numerous kinds of bugfixes and refactoring to help improve
5998 Tor's stability and ease of development.
6000 o Major features (onion service v3, denial of service):
6001 - Add onion service introduction denial of service defenses. Intro
6002 points can now rate-limit client introduction requests, using
6003 parameters that can be sent by the service within the
6004 ESTABLISH_INTRO cell. If the cell extension for this is not used,
6005 the intro point will honor the consensus parameters. Closes
6008 o Major bugfixes (circuit build, guard):
6009 - When considering upgrading circuits from "waiting for guard" to
6010 "open", always ignore circuits that are marked for close.
6011 Previously we could end up in the situation where a subsystem is
6012 notified of a circuit opening, but the circuit is still marked for
6013 close, leading to undesirable behavior. Fixes bug 30871; bugfix
6016 o Major bugfixes (crash, Linux, Android):
6017 - Tolerate systems (including some Android installations) where
6018 madvise and MADV_DONTDUMP are available at build-time, but not at
6019 run time. Previously, these systems would notice a failed syscall
6020 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
6021 - Tolerate systems (including some Linux installations) where
6022 madvise and/or MADV_DONTFORK are available at build-time, but not
6023 at run time. Previously, these systems would notice a failed
6024 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
6026 o Minor features (best practices tracker):
6027 - Our best-practices tracker now integrates with our include-checker
6028 tool to keep track of how many layering violations we have not yet
6029 fixed. We hope to reduce this number over time to improve Tor's
6030 modularity. Closes ticket 31176.
6031 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
6032 practracker from the environment. We may want this for continuous
6033 integration. Closes ticket 31309.
6034 - Give a warning rather than an error when a practracker exception
6035 is violated by a small amount, add a --list-overbroad option to
6036 practracker that lists exceptions that are stricter than they need
6037 to be, and provide an environment variable for disabling
6038 practracker. Closes ticket 30752.
6039 - Our best-practices tracker now looks at headers as well as C
6040 files. Closes ticket 31175.
6042 o Minor features (build system):
6043 - Add --disable-manpage and --disable-html-manual options to
6044 configure script. This will enable shortening build times by not
6045 building documentation. Resolves issue 19381.
6047 o Minor features (compilation):
6048 - Log a more useful error message when we are compiling and one of
6049 the compile-time hardening options we have selected can be linked
6050 but not executed. Closes ticket 27530.
6052 o Minor features (configuration):
6053 - The configuration code has been extended to allow splitting
6054 configuration data across multiple objects. Previously, all
6055 configuration data needed to be kept in a single object, which
6056 tended to become bloated. Closes ticket 31240.
6058 o Minor features (continuous integration):
6059 - When running CI builds on Travis, put some random data in
6060 ~/.torrc, to make sure no tests are reading the Tor configuration
6061 file from its default location. Resolves issue 30102.
6063 o Minor features (debugging):
6064 - Log a nonfatal assertion failure if we encounter a configuration
6065 line whose command is "CLEAR" but which has a nonempty value. This
6066 should be impossible, according to the rules of our configuration
6067 line parsing. Closes ticket 31529.
6069 o Minor features (git hooks):
6070 - Our pre-commit git hook now checks for a special file before
6071 running practracker, so that practracker only runs on branches
6072 that are based on master. Since the pre-push hook calls the pre-
6073 commit hook, practracker will also only run before pushes of
6074 branches based on master. Closes ticket 30979.
6076 o Minor features (git scripts):
6077 - Add a "--" command-line argument, to separate git-push-all.sh
6078 script arguments from arguments that are passed through to git
6079 push. Closes ticket 31314.
6080 - Add a -r <remote-name> argument to git-push-all.sh, so the script
6081 can push test branches to a personal remote. Closes ticket 31314.
6082 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
6083 git-push-all.sh, which makes these scripts create, merge forward,
6084 and push test branches. Closes ticket 31314.
6085 - Add a -u argument to git-merge-forward.sh, so that the script can
6086 re-use existing test branches after a merge failure and fix.
6087 Closes ticket 31314.
6088 - Add a TOR_GIT_PUSH env var, which sets the default git push
6089 command and arguments for git-push-all.sh. Closes ticket 31314.
6090 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
6091 script push master and maint branches with a delay between each
6092 branch. These delays trigger the CI jobs in a set order, which
6093 should show the most likely failures first. Also make pushes
6094 atomic by default, and make the script pass any command-line
6095 arguments to git push. Closes ticket 29879.
6096 - Call the shellcheck script from the pre-commit hook. Closes
6098 - Skip pushing test branches that are the same as a remote
6099 maint/release/master branch in git-push-all.sh by default. Add a
6100 -s argument, so git-push-all.sh can push all test branches. Closes
6103 o Minor features (IPv6, logging):
6104 - Log IPv6 addresses as well as IPv4 addresses when describing
6105 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
6107 o Minor features (onion service v3):
6108 - Do not allow single hop clients to fetch or post an HS descriptor
6109 from an HSDir. Closes ticket 24964.
6111 o Minor features (onion service):
6112 - Disallow single-hop clients at the introduction point. We've
6113 removed Tor2web support a while back and single-hop rendezvous
6114 attempts are blocked at the relays. This change should remove load
6115 off the network from spammy clients. Close ticket 24963.
6117 o Minor features (stem tests):
6118 - Change "make test-stem" so it only runs the stem tests that use
6119 tor. This change makes test-stem faster and more reliable. Closes
6122 o Minor features (testing):
6123 - Add a script to invoke "tor --dump-config" and "tor
6124 --verify-config" with various configuration options, and see
6125 whether tor's resulting configuration or error messages are what
6126 we expect. Use it for integration testing of our +Option and
6127 /Option flags. Closes ticket 31637.
6128 - Improve test coverage for our existing configuration parsing and
6129 management API. Closes ticket 30893.
6130 - Add integration tests to make sure that practracker gives the
6131 outputs we expect. Closes ticket 31477.
6132 - The practracker self-tests are now run as part of the Tor test
6133 suite. Closes ticket 31304.
6135 o Minor features (token bucket):
6136 - Implement a generic token bucket that uses a single counter, for
6137 use in anti-DoS onion service work. Closes ticket 30687.
6139 o Minor bugfixes (best practices tracker):
6140 - Fix a few issues in the best-practices script, including tests,
6141 tab tolerance, error reporting, and directory-exclusion logic.
6142 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
6143 - When running check-best-practices, only consider files in the src
6144 subdirectory. Previously we had recursively considered all
6145 subdirectories, which made us get confused by the temporary
6146 directories made by "make distcheck". Fixes bug 31578; bugfix
6149 o Minor bugfixes (build system):
6150 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
6151 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
6153 o Minor bugfixes (chutney, makefiles, documentation):
6154 - "make test-network-all" now shows the warnings from each test-
6155 network.sh run on the console, so developers see new warnings
6156 early. We've also improved the documentation for this feature, and
6157 renamed a Makefile variable so the code is self-documenting. Fixes
6158 bug 30455; bugfix on 0.3.0.4-rc.
6160 o Minor bugfixes (compilation):
6161 - Add more stub functions to fix compilation on Android with link-
6162 time optimization when --disable-module-dirauth is used.
6163 Previously, these compilation settings would make the compiler
6164 look for functions that didn't exist. Fixes bug 31552; bugfix
6166 - Suppress spurious float-conversion warnings from GCC when calling
6167 floating-point classifier functions on FreeBSD. Fixes part of bug
6168 31687; bugfix on 0.3.1.5-alpha.
6170 o Minor bugfixes (configuration):
6171 - Invalid floating-point values in the configuration file are now
6172 treated as errors in the configuration. Previously, they were
6173 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
6175 o Minor bugfixes (coverity):
6176 - Add an assertion when parsing a BEGIN cell so that coverity can be
6177 sure that we are not about to dereference a NULL address. Fixes
6178 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
6179 - In our siphash implementation, when building for coverity, use
6180 memcpy in place of a switch statement, so that coverity can tell
6181 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
6182 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
6183 - Fix several coverity warnings from our unit tests. Fixes bug
6184 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
6186 o Minor bugfixes (developer tooling):
6187 - Only log git script changes in the post-merge script when the
6188 merge was to the master branch. Fixes bug 31040; bugfix
6191 o Minor bugfixes (directory authorities):
6192 - Return a distinct status when formatting annotations fails. Fixes
6193 bug 30780; bugfix on 0.2.0.8-alpha.
6195 o Minor bugfixes (error handling):
6196 - On abort, try harder to flush the output buffers of log messages.
6197 On some platforms (macOS), log messages could be discarded when
6198 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6199 - Report the tor version whenever an assertion fails. Previously, we
6200 only reported the Tor version on some crashes, and some non-fatal
6201 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
6202 - When tor aborts due to an error, close log file descriptors before
6203 aborting. Closing the logs makes some OSes flush log file buffers,
6204 rather than deleting buffered log lines. Fixes bug 31594; bugfix
6207 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
6208 - When extracting an IPv6 address from a PF-based proxy, verify that
6209 we are actually configured to receive an IPv6 address, and log an
6210 internal error if not. Fixes part of bug 31687; bugfix
6213 o Minor bugfixes (git hooks):
6214 - Remove a duplicate call to practracker from the pre-push hook. The
6215 pre-push hook already calls the pre-commit hook, which calls
6216 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
6218 o Minor bugfixes (git scripts):
6219 - Stop hard-coding the bash path in the git scripts. Some OSes don't
6220 have bash in /usr/bin, others have an ancient bash at this path.
6221 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
6222 - Stop hard-coding the tor master branch name and worktree path in
6223 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
6224 - Allow git-push-all.sh to be run from any directory. Previously,
6225 the script only worked if run from an upstream worktree directory.
6226 Closes ticket 31678.
6228 o Minor bugfixes (guards):
6229 - When tor is missing descriptors for some primary entry guards,
6230 make the log message less alarming. It's normal for descriptors to
6231 expire, as long as tor fetches new ones soon after. Fixes bug
6232 31657; bugfix on 0.3.3.1-alpha.
6234 o Minor bugfixes (ipv6):
6235 - Check for private IPv6 addresses alongside their IPv4 equivalents
6236 when authorities check descriptors. Previously, we only checked
6237 for private IPv4 addresses. Fixes bug 31088; bugfix on
6238 0.2.3.21-rc. Patch by Neel Chauhan.
6239 - When parsing microdescriptors, we should check the IPv6 exit
6240 policy alongside IPv4. Previously, we checked both exit policies
6241 for only router info structures, while microdescriptors were
6242 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
6245 o Minor bugfixes (logging):
6246 - Change log level of message "Hash of session info was not as
6247 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
6249 - Fix a code issue that would have broken our parsing of log domains
6250 as soon as we had 33 of them. Fortunately, we still only have 29.
6251 Fixes bug 31451; bugfix on 0.4.1.4-rc.
6253 o Minor bugfixes (memory management):
6254 - Stop leaking a small amount of memory in nt_service_install(), in
6255 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
6258 o Minor bugfixes (networking, IP addresses):
6259 - When parsing addresses via Tor's internal DNS lookup API, reject
6260 IPv4 addresses in square brackets, and accept IPv6 addresses in
6261 square brackets. This change completes the work started in 23082,
6262 making address parsing consistent between tor's internal DNS
6263 lookup and address parsing APIs. Fixes bug 30721; bugfix
6265 - When parsing addresses via Tor's internal address:port parsing and
6266 DNS lookup APIs, require IPv6 addresses with ports to have square
6267 brackets. But allow IPv6 addresses without ports, whether or not
6268 they have square brackets. Fixes bug 30721; bugfix
6271 o Minor bugfixes (onion service v3):
6272 - When purging the client descriptor cache, close any introduction
6273 point circuits associated with purged cache entries. This avoids
6274 picking those circuits later when connecting to the same
6275 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
6277 o Minor bugfixes (onion services):
6278 - In the hs_ident_circuit_t data structure, remove the unused field
6279 circuit_type and the respective argument in hs_ident_circuit_new().
6280 This field was set by clients (for introduction) and services (for
6281 introduction and rendezvous) but was never used afterwards. Fixes
6282 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
6284 o Minor bugfixes (operator tools):
6285 - Make tor-print-ed-signing-cert(1) print certificate expiration
6286 date in RFC 1123 and UNIX timestamp formats, to make output
6287 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
6289 o Minor bugfixes (rust):
6290 - Correctly exclude a redundant rust build job in Travis. Fixes bug
6291 31463; bugfix on 0.3.5.4-alpha.
6292 - Raise the minimum rustc version to 1.31.0, as checked by configure
6293 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
6295 o Minor bugfixes (sendme, code structure):
6296 - Rename the trunnel SENDME file definition from sendme.trunnel to
6297 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
6298 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
6300 o Minor bugfixes (statistics):
6301 - Stop removing the ed25519 signature if the extra info file is too
6302 big. If the signature data was removed, but the keyword was kept,
6303 this could result in an unparseable extra info file. Fixes bug
6304 30958; bugfix on 0.2.7.2-alpha.
6306 o Minor bugfixes (subsystems):
6307 - Make the subsystem init order match the subsystem module
6308 dependencies. Call windows process security APIs as early as
6309 possible. Initialize logging before network and time, so that
6310 network and time can use logging. Fixes bug 31615; bugfix
6313 o Minor bugfixes (testing):
6314 - Teach the util/socketpair_ersatz test to work correctly when we
6315 have no network stack configured. Fixes bug 30804; bugfix
6318 o Minor bugfixes (v2 single onion services):
6319 - Always retry v2 single onion service intro and rend circuits with
6320 a 3-hop path. Previously, v2 single onion services used a 3-hop
6321 path when rendezvous circuits were retried after a remote or
6322 delayed failure, but a 1-hop path for immediate retries. Fixes bug
6323 23818; bugfix on 0.2.9.3-alpha.
6325 o Minor bugfixes (v3 single onion services):
6326 - Always retry v3 single onion service intro and rend circuits with
6327 a 3-hop path. Previously, v3 single onion services used a 3-hop
6328 path when rend circuits were retried after a remote or delayed
6329 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6330 bugfix on 0.3.2.1-alpha.
6331 - Make v3 single onion services fall back to a 3-hop intro, when all
6332 intro points are unreachable via a 1-hop path. Previously, v3
6333 single onion services failed when all intro nodes were unreachable
6334 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6337 - Improve documentation in circuit padding subsystem. Patch by
6338 Tobias Pulls. Closes ticket 31113.
6339 - Include an example usage for IPv6 ORPort in our sample torrc.
6340 Closes ticket 31320; patch from Ali Raheem.
6341 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6342 notice.html so that operators no longer have to host it
6343 themselves. Closes ticket 31089.
6346 - No longer include recommended package digests in votes as detailed
6347 in proposal 301. The RecommendedPackages torrc option is
6348 deprecated and will no longer have any effect. "package" lines
6349 will still be considered when computing consensuses for consensus
6350 methods that include them. (This change has no effect on the list
6351 of recommended Tor versions, which is still in use.) Closes
6353 - Remove torctl.in from contrib/dist directory. Resolves
6357 - Run shellcheck for all non-third-party shell scripts that are
6358 shipped with Tor. Closes ticket 29533.
6359 - When checking shell scripts, ignore any user-created directories.
6360 Closes ticket 30967.
6362 o Code simplification and refactoring (config handling):
6363 - Extract our variable manipulation code from confparse.c to a new
6364 lower-level typedvar.h module. Closes ticket 30864.
6365 - Lower another layer of object management from confparse.c to a
6366 more general tool. Now typed structure members are accessible via
6367 an abstract type. Implements ticket 30914.
6368 - Move our backend logic for working with configuration and state
6369 files into a lower-level library, since it no longer depends on
6370 any tor-specific functionality. Closes ticket 31626.
6371 - Numerous simplifications in configuration-handling logic: remove
6372 duplicated macro definitions, replace magical names with flags,
6373 and refactor "TestingTorNetwork" to use the same default-option
6374 logic as the rest of Tor. Closes ticket 30935.
6375 - Replace our ad-hoc set of flags for configuration variables and
6376 configuration variable types with fine-grained orthogonal flags
6377 corresponding to the actual behavior we want. Closes ticket 31625.
6379 o Code simplification and refactoring (misc):
6380 - Eliminate some uses of lower-level control reply abstractions,
6381 primarily in the onion_helper functions. Closes ticket 30889.
6382 - Rework bootstrap tracking to use the new publish-subscribe
6383 subsystem. Closes ticket 29976.
6384 - Rewrite format_node_description() and router_get_verbose_nickname()
6385 to use strlcpy() and strlcat(). The previous implementation used
6386 memcpy() and pointer arithmetic, which was error-prone. Closes
6387 ticket 31545. This is CID 1452819.
6388 - Split extrainfo_dump_to_string() into smaller functions. Closes
6390 - Use the ptrdiff_t type consistently for expressing variable
6391 offsets and pointer differences. Previously we incorrectly (but
6392 harmlessly) used int and sometimes off_t for these cases. Closes
6394 - Use the subsystems mechanism to manage the main event loop code.
6395 Closes ticket 30806.
6396 - Various simplifications and minor improvements to the circuit
6397 padding machines. Patch by Tobias Pulls. Closes tickets 31112
6400 o Documentation (hard-coded directories):
6401 - Improve the documentation for the DirAuthority and FallbackDir
6402 torrc options. Closes ticket 30955.
6404 o Documentation (tor.1 man page):
6405 - Fix typo in tor.1 man page: the option is "--help", not "-help".
6406 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
6409 Changes in version 0.4.1.5 - 2019-08-20
6410 This is the first stable release in the 0.4.1.x series. This series
6411 adds experimental circuit-level padding, authenticated SENDME cells to
6412 defend against certain attacks, and several performance improvements
6413 to save on CPU consumption. It fixes bugs in bootstrapping and v3
6414 onion services. It also includes numerous smaller features and
6415 bugfixes on earlier versions.
6417 Per our support policy, we will support the 0.4.1.x series for nine
6418 months, or until three months after the release of a stable 0.4.2.x:
6419 whichever is longer. If you need longer-term support, please stick
6420 with 0.3.5.x, which will we plan to support until Feb 2022.
6422 Below are the changes since 0.4.1.4-rc. For a complete list of changes
6423 since 0.4.0.5, see the ReleaseNotes file.
6425 o Directory authority changes:
6426 - The directory authority "dizum" has a new IP address. Closes
6429 o Minor features (circuit padding logging):
6430 - Demote noisy client-side warn logs about circuit padding to
6431 protocol warnings. Add additional log messages and circuit ID
6432 fields to help with bug 30992 and any other future issues.
6434 o Minor bugfixes (circuit padding negotiation):
6435 - Bump the circuit padding protocol version to explicitly signify
6436 that the HS setup machine support is finalized in 0.4.1.x-stable.
6437 This also means that 0.4.1.x-alpha clients will not negotiate
6438 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
6439 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
6440 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
6442 o Minor bugfixes (circuit padding):
6443 - Ignore non-padding cells on padding circuits. This addresses
6444 various warning messages from subsystems that were not expecting
6445 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
6447 o Minor bugfixes (clock skew detection):
6448 - Don't believe clock skew results from NETINFO cells that appear to
6449 arrive before we sent the VERSIONS cells they are responding to.
6450 Previously, we would accept them up to 3 minutes "in the past".
6451 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6453 o Minor bugfixes (compatibility, standards compliance):
6454 - Fix a bug that would invoke undefined behavior on certain
6455 operating systems when trying to asprintf() a string exactly
6456 INT_MAX bytes long. We don't believe this is exploitable, but it's
6457 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
6458 Found and fixed by Tobias Stoeckmann.
6460 o Minor bugfixes (compilation warning):
6461 - Fix a compilation warning on Windows about casting a function
6462 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6465 o Minor bugfixes (compilation):
6466 - Avoid using labs() on time_t, which can cause compilation warnings
6467 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6469 o Minor bugfixes (distribution):
6470 - Do not ship any temporary files found in the
6471 scripts/maint/practracker directory. Fixes bug 31311; bugfix
6474 o Testing (continuous integration):
6475 - In Travis, make stem log a controller trace to the console, and
6476 tail stem's tor log after failure. Closes ticket 30591.
6477 - In Travis, only run the stem tests that use a tor binary. Closes
6481 Changes in version 0.4.1.4-rc - 2019-07-25
6482 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
6483 updates to a new list of fallback directories. If no new bugs are
6484 found, the next release in the 0.4.1.x serious should be stable.
6486 o Major bugfixes (circuit build, guard):
6487 - When considering upgrading circuits from "waiting for guard" to
6488 "open", always ignore circuits that are marked for close. Otherwise,
6489 we can end up in the situation where a subsystem is notified that
6490 a closing circuit has just opened, leading to undesirable
6491 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
6493 o Minor features (continuous integration):
6494 - Our Travis configuration now uses Chutney to run some network
6495 integration tests automatically. Closes ticket 29280.
6497 o Minor features (fallback directory list):
6498 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6499 in December 2018 (of which ~122 were still functional), with a
6500 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6501 in June 2019. Closes ticket 28795.
6503 o Minor bugfixes (circuit padding):
6504 - On relays, properly check that a padding machine is absent before
6505 logging a warning about it being absent. Fixes bug 30649; bugfix
6507 - Add two NULL checks in unreachable places to silence Coverity (CID
6508 144729 and 1447291) and better future-proof ourselves. Fixes bug
6509 31024; bugfix on 0.4.1.1-alpha.
6511 o Minor bugfixes (crash on exit):
6512 - Avoid a set of possible code paths that could try to use freed
6513 memory in routerlist_free() while Tor was exiting. Fixes bug
6514 31003; bugfix on 0.1.2.2-alpha.
6516 o Minor bugfixes (logging):
6517 - Fix a conflict between the flag used for messaging-domain log
6518 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
6521 o Minor bugfixes (memory leaks):
6522 - Fix a trivial memory leak when parsing an invalid value from a
6523 download schedule in the configuration. Fixes bug 30894; bugfix
6526 o Code simplification and refactoring:
6527 - Remove some dead code from circpad_machine_remove_token() to fix
6528 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
6532 Changes in version 0.4.1.3-alpha - 2019-06-25
6533 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
6534 alpha, most of them from earlier release series.
6536 o Major bugfixes (Onion service reachability):
6537 - Properly clean up the introduction point map when circuits change
6538 purpose from onion service circuits to pathbias, measurement, or
6539 other circuit types. This should fix some service-side instances
6540 of introduction point failure. Fixes bug 29034; bugfix
6543 o Minor features (geoip):
6544 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
6545 Country database. Closes ticket 30852.
6547 o Minor features (logging):
6548 - Give a more useful assertion failure message if we think we have
6549 minherit() but we fail to make a region non-inheritable. Give a
6550 compile-time warning if our support for minherit() is incomplete.
6551 Closes ticket 30686.
6553 o Minor bugfixes (circuit isolation):
6554 - Fix a logic error that prevented the SessionGroup sub-option from
6555 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6557 o Minor bugfixes (continuous integration):
6558 - Allow the test-stem job to fail in Travis, because it sometimes
6559 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6560 - Skip test_rebind on macOS in Travis, because it is unreliable on
6561 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6562 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6563 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6565 o Minor bugfixes (directory authorities):
6566 - Stop crashing after parsing an unknown descriptor purpose
6567 annotation. We think this bug can only be triggered by modifying a
6568 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6570 o Minor bugfixes (pluggable transports):
6571 - When running as a bridge with pluggable transports, always publish
6572 pluggable transport information in our extrainfo descriptor, even
6573 if ExtraInfoStatistics is 0. This information is needed by
6574 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
6577 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
6578 Closes ticket 30630.
6581 Changes in version 0.4.1.2-alpha - 2019-06-06
6582 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
6583 previous alpha, and some much older. It also contains minor testing
6584 improvements, and an improvement to the security of our authenticated
6585 SENDME implementation.
6587 o Major bugfixes (bridges):
6588 - Consider our directory information to have changed when our list
6589 of bridges changes. Previously, Tor would not re-compute the
6590 status of its directory information when bridges changed, and
6591 therefore would not realize that it was no longer able to build
6592 circuits. Fixes part of bug 29875.
6593 - Do not count previously configured working bridges towards our
6594 total of working bridges. Previously, when Tor's list of bridges
6595 changed, it would think that the old bridges were still usable,
6596 and delay fetching router descriptors for the new ones. Fixes part
6597 of bug 29875; bugfix on 0.3.0.1-alpha.
6599 o Major bugfixes (flow control, SENDME):
6600 - Decrement the stream-level package window after packaging a cell.
6601 Previously, it was done inside a log_debug() call, meaning that if
6602 debug logs were not enabled, the decrement would never happen, and
6603 thus the window would be out of sync with the other end point.
6604 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
6606 o Major bugfixes (onion service reachability):
6607 - Properly clean up the introduction point map and associated state
6608 when circuits change purpose from onion service circuits to
6609 pathbias, measurement, or other circuit types. This may fix some
6610 instances of introduction point failure. Fixes bug 29034; bugfix
6613 o Minor features (authenticated SENDME):
6614 - Ensure that there is enough randomness on every circuit to prevent
6615 an attacker from successfully predicting the hashes they will need
6616 to include in authenticated SENDME cells. At a random interval, if
6617 we have not sent randomness already, we now leave some extra space
6618 at the end of a cell that we can fill with random bytes. Closes
6621 o Minor features (continuous integration):
6622 - When running coverage builds on Travis, we now set
6623 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
6626 o Minor features (maintenance):
6627 - Add a new "make autostyle" target that developers can use to apply
6628 all automatic Tor style and consistency conversions to the
6629 codebase. Closes ticket 30539.
6631 o Minor features (testing):
6632 - The circuitpadding tests now use a reproducible RNG implementation,
6633 so that if a test fails, we can learn why. Part of ticket 28878.
6634 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
6635 to set the RNG seed for tests that use a reproducible RNG. Part of
6637 - When running tests in coverage mode, take additional care to make
6638 our coverage deterministic, so that we can accurately track
6639 changes in code coverage. Closes ticket 30519.
6641 o Minor bugfixes (configuration, proxies):
6642 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6643 want authentication along with configured (but unused!)
6644 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6646 o Minor bugfixes (controller):
6647 - POSTDESCRIPTOR requests should work again. Previously, they were
6648 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
6650 - Repair the HSFETCH command so that it works again. Previously, it
6651 expected a body when it shouldn't have. Fixes bug 30646; bugfix
6654 o Minor bugfixes (developer tooling):
6655 - Fix pre-push hook to allow fixup and squash commits when pushing
6656 to non-upstream git remote. Fixes bug 30286; bugfix
6659 o Minor bugfixes (directory authority):
6660 - Move the "bandwidth-file-headers" line in directory authority
6661 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6664 o Minor bugfixes (NetBSD):
6665 - Fix usage of minherit() on NetBSD and other platforms that define
6666 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
6667 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
6669 o Minor bugfixes (out-of-memory handler):
6670 - When purging the DNS cache because of an out-of-memory condition,
6671 try purging just the older entries at first. Previously, we would
6672 always purge the whole thing. Fixes bug 29617; bugfix
6675 o Minor bugfixes (portability):
6676 - Avoid crashing in our tor_vasprintf() implementation on systems
6677 that define neither vasprintf() nor _vscprintf(). (This bug has
6678 been here long enough that we question whether people are running
6679 Tor on such systems, but we're applying the fix out of caution.)
6680 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6683 o Minor bugfixes (shutdown, libevent, memory safety):
6684 - Avoid use-after-free bugs when shutting down, by making sure that
6685 we shut down libevent only after shutting down all of its users.
6686 We believe these are harmless in practice, since they only occur
6687 on the shutdown path, and do not involve any attacker-controlled
6688 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
6690 o Minor bugfixes (static analysis):
6691 - Fix several spurious Coverity warnings about the unit tests, to
6692 lower our chances of missing real warnings in the future. Fixes
6693 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
6696 - Specify torrc paths (with empty files) when launching tor in
6697 integration tests; refrain from reading user and system torrcs.
6698 Resolves issue 29702.
6701 Changes in version 0.4.1.1-alpha - 2019-05-22
6702 This is the first alpha in the 0.4.1.x series. It introduces
6703 lightweight circuit padding to make some onion-service circuits harder
6704 to distinguish, includes a new "authenticated SENDME" feature to make
6705 certain denial-of-service attacks more difficult, and improves
6706 performance in several areas.
6708 o Major features (circuit padding):
6709 - Onion service clients now add padding cells at the start of their
6710 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
6711 look more like general purpose Exit traffic. The overhead for this
6712 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
6713 extra upstream cell and 10 downstream cells for INTRODUCE
6714 circuits. This feature is only enabled when also supported by the
6715 circuit's middle node. (Clients may specify fixed middle nodes
6716 with the MiddleNodes option, and may force-disable this feature
6717 with the CircuitPadding option.) Closes ticket 28634.
6719 o Major features (code organization):
6720 - Tor now includes a generic publish-subscribe message-passing
6721 subsystem that we can use to organize intermodule dependencies. We
6722 hope to use this to reduce dependencies between modules that don't
6723 need to be related, and to generally simplify our codebase. Closes
6726 o Major features (controller protocol):
6727 - Controller commands are now parsed using a generalized parsing
6728 subsystem. Previously, each controller command was responsible for
6729 parsing its own input, which led to strange inconsistencies.
6730 Closes ticket 30091.
6732 o Major features (flow control):
6733 - Implement authenticated SENDMEs as detailed in proposal 289. A
6734 SENDME cell now includes the digest of the traffic that it
6735 acknowledges, so that once an end point receives the SENDME, it
6736 can confirm the other side's knowledge of the previous cells that
6737 were sent, and prevent certain types of denial-of-service attacks.
6738 This behavior is controlled by two new consensus parameters: see
6739 the proposal for more details. Fixes ticket 26288.
6741 o Major features (performance):
6742 - Our node selection algorithm now excludes nodes in linear time.
6743 Previously, the algorithm was quadratic, which could slow down
6744 heavily used onion services. Closes ticket 30307.
6746 o Major features (performance, RNG):
6747 - Tor now constructs a fast secure pseudorandom number generator for
6748 each thread, to use when performance is critical. This PRNG is
6749 based on AES-CTR, using a buffering construction similar to
6750 libottery and the (newer) OpenBSD arc4random() code. It
6751 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
6752 small outputs. Although we believe it to be cryptographically
6753 strong, we are only using it when necessary for performance.
6754 Implements tickets 29023 and 29536.
6756 o Major bugfixes (onion service v3):
6757 - Fix an unreachable bug in which an introduction point could try to
6758 send an INTRODUCE_ACK with a status code that Trunnel would refuse
6759 to encode, leading the relay to assert(). We've consolidated the
6760 ABI values into Trunnel now. Fixes bug 30454; bugfix
6762 - Clients can now handle unknown status codes from INTRODUCE_ACK
6763 cells. (The NACK behavior will stay the same.) This will allow us
6764 to extend status codes in the future without breaking the normal
6765 client behavior. Fixes another part of bug 30454; bugfix
6768 o Minor features (circuit padding):
6769 - We now use a fast PRNG when scheduling circuit padding. Part of
6771 - Allow the padding machine designer to pick the edges of their
6772 histogram instead of trying to compute them automatically using an
6773 exponential formula. Resolves some undefined behavior in the case
6774 of small histograms and allows greater flexibility on machine
6775 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
6776 - Allow circuit padding machines to hold a circuit open until they
6777 are done padding it. Closes ticket 28780.
6779 o Minor features (compile-time modules):
6780 - Add a "--list-modules" command to print a list of which compile-
6781 time modules are enabled. Closes ticket 30452.
6783 o Minor features (continuous integration):
6784 - Remove sudo configuration lines from .travis.yml as they are no
6785 longer needed with current Travis build environment. Resolves
6787 - In Travis, show stem's tor log after failure. Closes ticket 30234.
6789 o Minor features (controller):
6790 - Add onion service version 3 support to the HSFETCH command.
6791 Previously, only version 2 onion services were supported. Closes
6792 ticket 25417. Patch by Neel Chauhan.
6794 o Minor features (debugging):
6795 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
6796 logging of additional information during assert failure. Now we
6797 can use format strings to include information for trouble
6798 shooting. Resolves ticket 29662.
6800 o Minor features (defense in depth):
6801 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
6802 case a bug causes them to be used later. Closes ticket 30176.
6803 Patch from Tobias Stoeckmann.
6804 - Tor now uses a cryptographically strong PRNG even for decisions
6805 that we do not believe are security-sensitive. Previously, for
6806 performance reasons, we had used a trivially predictable linear
6807 congruential generator algorithm for certain load-balancing and
6808 statistical sampling decisions. Now we use our fast RNG in those
6809 cases. Closes ticket 29542.
6811 o Minor features (developer tools):
6812 - Tor's "practracker" test script now checks for files and functions
6813 that seem too long and complicated. Existing overlong functions
6814 and files are accepted for now, but should eventually be
6815 refactored. Closes ticket 29221.
6816 - Add some scripts used for git maintenance to scripts/git. Closes
6818 - Call practracker from pre-push and pre-commit git hooks to let
6819 developers know if they made any code style violations. Closes
6821 - Add a script to check that each header has a well-formed and
6822 unique guard macro. Closes ticket 29756.
6824 o Minor features (geoip):
6825 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
6826 Country database. Closes ticket 30522.
6828 o Minor features (HTTP tunnel):
6829 - Return an informative web page when the HTTPTunnelPort is used as
6830 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
6832 o Minor features (IPv6, v3 onion services):
6833 - Make v3 onion services put IPv6 addresses in service descriptors.
6834 Before this change, service descriptors only contained IPv4
6835 addresses. Implements 26992.
6837 o Minor features (modularity):
6838 - The "--disable-module-dirauth" compile-time option now disables
6839 even more dirauth-only code. Closes ticket 30345.
6841 o Minor features (performance):
6842 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
6843 1.1.1 and later), since they tend to be faster than tiny-keccak.
6844 Closes ticket 28837.
6846 o Minor features (testing):
6847 - Tor's unit test code now contains helper functions to replace the
6848 PRNG with a deterministic or reproducible version for testing.
6849 Previously, various tests implemented this in various ways.
6850 Implements ticket 29732.
6851 - We now have a script, cov-test-determinism.sh, to identify places
6852 where our unit test coverage has become nondeterministic. Closes
6854 - Check that representative subsets of values of `int` and `unsigned
6855 int` can be represented by `void *`. Resolves issue 29537.
6857 o Minor bugfixes (bridge authority):
6858 - Bridge authorities now set bridges as running or non-running when
6859 about to dump their status to a file. Previously, they set bridges
6860 as running in response to a GETINFO command, but those shouldn't
6861 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
6862 Patch by Neel Chauhan.
6864 o Minor bugfixes (channel padding statistics):
6865 - Channel padding write totals and padding-enabled totals are now
6866 counted properly in relay extrainfo descriptors. Fixes bug 29231;
6867 bugfix on 0.3.1.1-alpha.
6869 o Minor bugfixes (circuit padding):
6870 - Add a "CircuitPadding" torrc option to disable circuit padding.
6871 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
6872 - Allow circuit padding machines to specify that they do not
6873 contribute much overhead, and provide consensus flags and torrc
6874 options to force clients to only use these low overhead machines.
6875 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
6876 - Provide a consensus parameter to fully disable circuit padding, to
6877 be used in emergency network overload situations. Fixes bug 30173;
6878 bugfix on 0.4.0.1-alpha.
6879 - The circuit padding subsystem will no longer schedule padding if
6880 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
6881 - Inspect a circuit-level cell queue before sending padding, to
6882 avoid sending padding while too much data is already queued. Fixes
6883 bug 29204; bugfix on 0.4.0.1-alpha.
6884 - Avoid calling monotime_absolute_usec() in circuit padding machines
6885 that do not use token removal or circuit RTT estimation. Fixes bug
6886 29085; bugfix on 0.4.0.1-alpha.
6888 o Minor bugfixes (compilation, unusual configurations):
6889 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
6890 due to missing declarations of abort(), and prevent other such
6891 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
6893 o Minor bugfixes (controller protocol):
6894 - Teach the controller parser to distinguish an object preceded by
6895 an argument list from one without. Previously, it couldn't
6896 distinguish an argument list from the first line of a multiline
6897 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
6899 o Minor bugfixes (directory authority, ipv6):
6900 - Directory authorities with IPv6 support now always mark themselves
6901 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
6902 Patch by Neel Chauhan.
6904 o Minor bugfixes (documentation):
6905 - Improve the documentation for using MapAddress with ".exit". Fixes
6906 bug 30109; bugfix on 0.1.0.1-rc.
6907 - Improve the monotonic time module and function documentation to
6908 explain what "monotonic" actually means, and document some results
6909 that have surprised people. Fixes bug 29640; bugfix
6911 - Use proper formatting when providing an example on quoting options
6912 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
6914 o Minor bugfixes (logging):
6915 - Do not log a warning when running with an OpenSSL version other
6916 than the one Tor was compiled with, if the two versions should be
6917 compatible. Previously, we would warn whenever the version was
6918 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
6919 - Warn operators when the MyFamily option is set but ContactInfo is
6920 missing, as the latter should be set too. Fixes bug 25110; bugfix
6923 o Minor bugfixes (memory leak):
6924 - Avoid a minor memory leak that could occur on relays when failing
6925 to create a "keys" directory. Fixes bug 30148; bugfix
6928 o Minor bugfixes (onion services):
6929 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
6930 implemenation) when failing to load an onion service client
6931 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
6932 - When refusing to launch a controller's HSFETCH request because of
6933 rate-limiting, respond to the controller with a new response,
6934 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
6935 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
6937 - When relaunching a circuit to a rendezvous service, mark the
6938 circuit as needing high-uptime routers as appropriate. Fixes bug
6939 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
6940 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
6941 (IPv6 support for v3 onion services is still incomplete: see
6942 ticket 23493 for details.) Fixes bug 23588; bugfix on
6943 0.3.2.1-alpha. Patch by Neel Chauhan.
6945 o Minor bugfixes (onion services, performance):
6946 - When building circuits to onion services, call tor_addr_parse()
6947 less often. Previously, we called tor_addr_parse() in
6948 circuit_is_acceptable() even if its output wasn't used. This
6949 change should improve performance when building circuits. Fixes
6950 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
6952 o Minor bugfixes (performance):
6953 - When checking whether a node is a bridge, use a fast check to make
6954 sure that its identity is set. Previously, we used a constant-time
6955 check, which is not necessary in this case. Fixes bug 30308;
6956 bugfix on 0.3.5.1-alpha.
6958 o Minor bugfixes (pluggable transports):
6959 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
6960 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
6962 o Minor bugfixes (probability distributions):
6963 - Refactor and improve parts of the probability distribution code
6964 that made Coverity complain. Fixes bug 29805; bugfix
6967 o Minor bugfixes (python):
6968 - Stop assuming that /usr/bin/python3 exists. For scripts that work
6969 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
6970 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
6972 o Minor bugfixes (relay):
6973 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
6974 is auto, act as if ExitRelay is 1. Previously, we would ignore
6975 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
6976 0.3.5.1-alpha. Patch by Neel Chauhan.
6978 o Minor bugfixes (stats):
6979 - When ExtraInfoStatistics is 0, stop including bandwidth usage
6980 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
6981 bridge statistics by country in extra-info documents. Fixes bug
6982 29018; bugfix on 0.2.4.1-alpha.
6984 o Minor bugfixes (testing):
6985 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
6986 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
6987 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
6988 - Fix some incorrect code in the v3 onion service unit tests. Fixes
6989 bug 29243; bugfix on 0.3.2.1-alpha.
6990 - In the "routerkeys/*" tests, check the return values of mkdir()
6991 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
6992 Found by Coverity as CID 1444254.
6993 - Split test_utils_general() into several smaller test functions.
6994 This makes it easier to perform resource deallocation on assert
6995 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
6996 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
6998 o Minor bugfixes (tor-resolve):
6999 - Fix a memory leak in tor-resolve that could happen if Tor gave it
7000 a malformed SOCKS response. (Memory leaks in tor-resolve don't
7001 actually matter, but it's good to fix them anyway.) Fixes bug
7002 30151; bugfix on 0.4.0.1-alpha.
7004 o Code simplification and refactoring:
7005 - Abstract out the low-level formatting of replies on the control
7006 port. Implements ticket 30007.
7007 - Add several assertions in an attempt to fix some Coverity
7008 warnings. Closes ticket 30149.
7009 - Introduce a connection_dir_buf_add() helper function that checks
7010 for compress_state of dir_connection_t and automatically writes a
7011 string to directory connection with or without compression.
7012 Resolves issue 28816.
7013 - Make the base32_decode() API return the number of bytes written,
7014 for consistency with base64_decode(). Closes ticket 28913.
7015 - Move most relay-only periodic events out of mainloop.c into the
7016 relay subsystem. Closes ticket 30414.
7017 - Refactor and encapsulate parts of the codebase that manipulate
7018 crypt_path_t objects. Resolves issue 30236.
7019 - Refactor several places in our code that Coverity incorrectly
7020 believed might have memory leaks. Closes ticket 30147.
7021 - Remove redundant return values in crypto_format, and the
7022 associated return value checks elsewhere in the code. Make the
7023 implementations in crypto_format consistent, and remove redundant
7024 code. Resolves ticket 29660.
7025 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
7026 it is not a constant-time function. Closes ticket 30309.
7027 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
7028 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
7029 bugfix on 0.3.2.1-alpha.
7030 - Simplify v3 onion service link specifier handling code. Fixes bug
7031 23576; bugfix on 0.3.2.1-alpha.
7032 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
7033 code. Resolves ticket 29108.
7034 - Split control.c into several submodules, in preparation for
7035 distributing its current responsibilities throughout the codebase.
7036 Closes ticket 29894.
7037 - Start to move responsibility for knowing about periodic events to
7038 the appropriate subsystems, so that the mainloop doesn't need to
7039 know all the periodic events in the rest of the codebase.
7040 Implements tickets 30293 and 30294.
7043 - Document how to find git commits and tags for bug fixes in
7044 CodingStandards.md. Update some file documentation. Closes
7048 - Remove the linux-tor-prio.sh script from contrib/operator-tools
7049 directory. Resolves issue 29434.
7050 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
7051 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
7054 o Code simplification and refactoring (shell scripts):
7055 - Clean up many of our shell scripts to fix shellcheck warnings.
7056 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
7057 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
7058 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
7059 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
7060 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
7061 nagios-check-tor-authority-cert (ticket 29071),
7062 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
7063 (ticket 29060), test_key_expiration.sh (ticket 30002),
7064 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
7067 o Testing (chutney):
7068 - In "make test-network-all", test IPv6-only v3 single onion
7069 services, using the chutney network single-onion-v23-ipv6-md.
7070 Closes ticket 27251.
7073 Changes in version 0.4.0.5 - 2019-05-02
7074 This is the first stable release in the 0.4.0.x series. It contains
7075 improvements for power management and bootstrap reporting, as well as
7076 preliminary backend support for circuit padding to prevent some kinds
7077 of traffic analysis. It also continues our work in refactoring Tor for
7078 long-term maintainability.
7080 Per our support policy, we will support the 0.4.0.x series for nine
7081 months, or until three months after the release of a stable 0.4.1.x:
7082 whichever is longer. If you need longer-term support, please stick
7083 with 0.3.5.x, which will we plan to support until Feb 2022.
7085 Below are the changes since 0.4.0.4-rc. For a complete list of changes
7086 since 0.3.5.7, see the ReleaseNotes file.
7088 o Minor features (continuous integration):
7089 - In Travis, tell timelimit to use stem's backtrace signals, and
7090 launch python directly from timelimit, so python receives the
7091 signals from timelimit, rather than make. Closes ticket 30117.
7093 o Minor features (diagnostic):
7094 - Add more diagnostic log messages in an attempt to solve the issue
7095 of NUL bytes appearing in a microdescriptor cache. Related to
7098 o Minor features (testing):
7099 - Use the approx_time() function when setting the "Expires" header
7100 in directory replies, to make them more testable. Needed for
7103 o Minor bugfixes (rust):
7104 - Abort on panic in all build profiles, instead of potentially
7105 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
7107 o Minor bugfixes (shellcheck):
7108 - Look for scripts in their correct locations during "make
7109 shellcheck". Previously we had looked in the wrong place during
7110 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
7112 o Minor bugfixes (testing):
7113 - Check the time in the "Expires" header using approx_time(). Fixes
7114 bug 30001; bugfix on 0.4.0.4-rc.
7116 o Minor bugfixes (UI):
7117 - Lower log level of unlink() errors during bootstrap. Fixes bug
7118 29930; bugfix on 0.4.0.1-alpha.
7121 Changes in version 0.4.0.4-rc - 2019-04-11
7122 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
7123 several bugs from earlier versions, including some that had affected
7124 stability, and one that prevented relays from working with NSS.
7126 o Major bugfixes (NSS, relay):
7127 - When running with NSS, disable TLS 1.2 ciphersuites that use
7128 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
7129 these ciphersuites don't work -- which caused relays to fail to
7130 handshake with one another when these ciphersuites were enabled.
7131 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
7133 o Minor features (bandwidth authority):
7134 - Make bandwidth authorities ignore relays that are reported in the
7135 bandwidth file with the flag "vote=0". This change allows us to
7136 report unmeasured relays for diagnostic reasons without including
7137 their bandwidth in the bandwidth authorities' vote. Closes
7139 - When a directory authority is using a bandwidth file to obtain the
7140 bandwidth values that will be included in the next vote, serve
7141 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
7144 o Minor features (circuit padding):
7145 - Stop warning about undefined behavior in the probability
7146 distribution tests. Float division by zero may technically be
7147 undefined behavior in C, but it's well defined in IEEE 754.
7148 Partial backport of 29298. Closes ticket 29527; bugfix
7151 o Minor features (continuous integration):
7152 - On Travis Rust builds, cleanup Rust registry and refrain from
7153 caching the "target/" directory to speed up builds. Resolves
7156 o Minor features (dormant mode):
7157 - Add a DormantCanceledByStartup option to tell Tor that it should
7158 treat a startup event as cancelling any previous dormant state.
7159 Integrators should use this option with caution: it should only be
7160 used if Tor is being started because of something that the user
7161 did, and not if Tor is being automatically started in the
7162 background. Closes ticket 29357.
7164 o Minor features (geoip):
7165 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
7166 Country database. Closes ticket 29992.
7168 o Minor features (NSS, diagnostic):
7169 - Try to log an error from NSS (if there is any) and a more useful
7170 description of our situation if we are using NSS and a call to
7171 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
7173 o Minor bugfixes (security):
7174 - Fix a potential double free bug when reading huge bandwidth files.
7175 The issue is not exploitable in the current Tor network because
7176 the vulnerable code is only reached when directory authorities
7177 read bandwidth files, but bandwidth files come from a trusted
7178 source (usually the authorities themselves). Furthermore, the
7179 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
7180 which are not used by any of the current authorities. Fixes bug
7181 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
7183 - Verify in more places that we are not about to create a buffer
7184 with more than INT_MAX bytes, to avoid possible OOB access in the
7185 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
7186 fixed by Tobias Stoeckmann.
7188 o Minor bugfix (continuous integration):
7189 - Reset coverage state on disk after Travis CI has finished. This
7190 should prevent future coverage merge errors from causing the test
7191 suite for the "process" subsystem to fail. The process subsystem
7192 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
7194 - Terminate test-stem if it takes more than 9.5 minutes to run.
7195 (Travis terminates the job after 10 minutes of no output.)
7196 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
7198 o Minor bugfixes (bootstrap reporting):
7199 - During bootstrap reporting, correctly distinguish pluggable
7200 transports from plain proxies. Fixes bug 28925; bugfix
7203 o Minor bugfixes (C correctness):
7204 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
7205 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
7208 o Minor bugfixes (circuitpadding testing):
7209 - Minor tweaks to avoid rare test failures related to timers and
7210 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
7212 o Minor bugfixes (directory authorities):
7213 - Actually include the bandwidth-file-digest line in directory
7214 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
7216 o Minor bugfixes (logging):
7217 - On Windows, when errors cause us to reload a consensus from disk,
7218 tell the user that we are retrying at log level "notice".
7219 Previously we only logged this information at "info", which was
7220 confusing because the errors themselves were logged at "warning".
7221 Improves previous fix for 28614. Fixes bug 30004; bugfix
7224 o Minor bugfixes (pluggable transports):
7225 - Restore old behavior when it comes to discovering the path of a
7226 given Pluggable Transport executable file. A change in
7227 0.4.0.1-alpha had broken this behavior on paths containing a
7228 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
7230 o Minor bugfixes (testing):
7231 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
7232 recent test-network.sh to use new chutney features in CI. Fixes
7233 bug 29703; bugfix on 0.2.9.1-alpha.
7234 - Fix a test failure on Windows caused by an unexpected "BUG"
7235 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
7238 o Minor bugfixes (TLS protocol):
7239 - When classifying a client's selection of TLS ciphers, if the
7240 client ciphers are not yet available, do not cache the result.
7241 Previously, we had cached the unavailability of the cipher list
7242 and never looked again, which in turn led us to assume that the
7243 client only supported the ancient V1 link protocol. This, in turn,
7244 was causing Stem integration tests to stall in some cases. Fixes
7245 bug 30021; bugfix on 0.2.4.8-alpha.
7247 o Code simplification and refactoring:
7248 - Introduce a connection_dir_buf_add() helper function that detects
7249 whether compression is in use, and adds a string accordingly.
7250 Resolves issue 28816.
7251 - Refactor handle_get_next_bandwidth() to use
7252 connection_dir_buf_add(). Implements ticket 29897.
7255 - Clarify that Tor performs stream isolation among *Port listeners
7256 by default. Resolves issue 29121.
7259 Changes in version 0.4.0.3-alpha - 2019-03-22
7260 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
7261 bugs from earlier versions.
7263 o Minor features (address selection):
7264 - Treat the subnet 100.64.0.0/10 as public for some purposes;
7265 private for others. This subnet is the RFC 6598 (Carrier Grade
7266 NAT) IP range, and is deployed by many ISPs as an alternative to
7267 RFC 1918 that does not break existing internal networks. Tor now
7268 blocks SOCKS and control ports on these addresses and warns users
7269 if client ports or ExtORPorts are listening on a RFC 6598 address.
7270 Closes ticket 28525. Patch by Neel Chauhan.
7272 o Minor features (geoip):
7273 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
7274 Country database. Closes ticket 29666.
7276 o Minor bugfixes (circuitpadding):
7277 - Inspect the circuit-level cell queue before sending padding, to
7278 avoid sending padding when too much data is queued. Fixes bug
7279 29204; bugfix on 0.4.0.1-alpha.
7281 o Minor bugfixes (logging):
7282 - Correct a misleading error message when IPv4Only or IPv6Only is
7283 used but the resolved address can not be interpreted as an address
7284 of the specified IP version. Fixes bug 13221; bugfix on
7285 0.2.3.9-alpha. Patch from Kris Katterjohn.
7286 - Log the correct port number for listening sockets when "auto" is
7287 used to let Tor pick the port number. Previously, port 0 was
7288 logged instead of the actual port number. Fixes bug 29144; bugfix
7289 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7290 - Stop logging a BUG() warning when Tor is waiting for exit
7291 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
7293 o Minor bugfixes (memory management):
7294 - Refactor the shared random state's memory management so that it
7295 actually takes ownership of the shared random value pointers.
7296 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
7298 o Minor bugfixes (memory management, testing):
7299 - Stop leaking parts of the shared random state in the shared-random
7300 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
7302 o Minor bugfixes (pluggable transports):
7303 - Fix an assertion failure crash bug when a pluggable transport is
7304 terminated during the bootstrap phase. Fixes bug 29562; bugfix
7307 o Minor bugfixes (Rust, protover):
7308 - Add a missing "Padding" value to the Rust implementation of
7309 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
7311 o Minor bugfixes (single onion services):
7312 - Allow connections to single onion services to remain idle without
7313 being disconnected. Previously, relays acting as rendezvous points
7314 for single onion services were mistakenly closing idle rendezvous
7315 circuits after 60 seconds, thinking that they were unused
7316 directory-fetching circuits that had served their purpose. Fixes
7317 bug 29665; bugfix on 0.2.1.26.
7319 o Minor bugfixes (stats):
7320 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
7321 relay and bridge extra-info documents. Fixes bug 29017; bugfix
7324 o Minor bugfixes (testing):
7325 - Downgrade some LOG_ERR messages in the address/* tests to
7326 warnings. The LOG_ERR messages were occurring when we had no
7327 configured network. We were failing the unit tests, because we
7328 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7329 29530; bugfix on 0.3.5.8.
7330 - Fix our gcov wrapper script to look for object files at the
7331 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7332 - Decrease the false positive rate of stochastic probability
7333 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7335 o Minor bugfixes (Windows, CI):
7336 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7337 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7338 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7339 fast_finish, so failed jobs terminate the build immediately. Fixes
7340 bug 29601; bugfix on 0.3.5.4-alpha.
7343 Changes in version 0.3.5.8 - 2019-02-21
7344 Tor 0.3.5.8 backports several fixes from later releases, including fixes
7345 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
7348 It also includes a fix for a medium-severity security bug affecting Tor
7349 0.3.2.1-alpha and later. All Tor instances running an affected release
7350 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7352 o Major bugfixes (cell scheduler, KIST, security):
7353 - Make KIST consider the outbuf length when computing what it can
7354 put in the outbuf. Previously, KIST acted as though the outbuf
7355 were empty, which could lead to the outbuf becoming too full. It
7356 is possible that an attacker could exploit this bug to cause a Tor
7357 client or relay to run out of memory and crash. Fixes bug 29168;
7358 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7359 TROVE-2019-001 and CVE-2019-8955.
7361 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
7362 - Gracefully handle empty username/password fields in SOCKS5
7363 username/password auth message and allow SOCKS5 handshake to
7364 continue. Previously, we had rejected these handshakes, breaking
7365 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7367 o Minor features (compilation, backport from 0.4.0.2-alpha):
7368 - Compile correctly when OpenSSL is built with engine support
7369 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7370 Patches from "Mangix".
7372 o Minor features (geoip):
7373 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7374 Country database. Closes ticket 29478.
7376 o Minor features (testing, backport from 0.4.0.2-alpha):
7377 - Treat all unexpected ERR and BUG messages as test failures. Closes
7380 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
7381 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7382 connection waiting for a descriptor that we actually have in the
7383 cache. It turns out that this can actually happen, though it is
7384 rare. Now, tor will recover and retry the descriptor. Fixes bug
7385 28669; bugfix on 0.3.2.4-alpha.
7387 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
7388 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7389 IPv6 socket was bound using an address family of AF_INET instead
7390 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7393 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7394 - Update Cargo.lock file to match the version made by the latest
7395 version of Rust, so that "make distcheck" will pass again. Fixes
7396 bug 29244; bugfix on 0.3.3.4-alpha.
7398 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
7399 - Select guards even if the consensus has expired, as long as the
7400 consensus is still reasonably live. Fixes bug 24661; bugfix
7403 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
7404 - Compile correctly on OpenBSD; previously, we were missing some
7405 headers required in order to detect it properly. Fixes bug 28938;
7406 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7408 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
7409 - Describe the contents of the v3 onion service client authorization
7410 files correctly: They hold public keys, not private keys. Fixes
7411 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7413 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
7414 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7415 link protocol versions when logging incoming/outgoing connection
7416 counts. Tor no longer skips version 5, and we won't have to
7417 remember to update this function when new link protocol version is
7418 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7420 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
7421 - Log more information at "warning" level when unable to read a
7422 private key; log more information at "info" level when unable to
7423 read a public key. We had warnings here before, but they were lost
7424 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7426 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
7427 - The amount of total available physical memory is now determined
7428 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7429 when it is defined and a 64-bit variant is not available. Fixes
7430 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7432 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7433 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7434 than one private key for a hidden service. Fixes bug 29040; bugfix
7436 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7437 "debug" level. Tor used to log it as a warning, which caused very
7438 long log lines to appear for some users. Fixes bug 29135; bugfix
7440 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7441 as a warning. Instead, log it as a protocol warning, because there
7442 is nothing that relay operators can do to fix it. Fixes bug 29029;
7443 bugfix on 0.2.5.7-rc.
7445 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
7446 - Mark outdated dirservers when Tor only has a reasonably live
7447 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7449 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
7450 - Detect and suppress "bug" warnings from the util/time test on
7451 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7452 - Do not log an error-level message if we fail to find an IPv6
7453 network interface from the unit tests. Fixes bug 29160; bugfix
7456 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
7457 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7458 Some users took this phrasing to mean that the mentioned guard was
7459 under their control or responsibility, which it is not. Fixes bug
7460 28895; bugfix on Tor 0.3.0.1-alpha.
7463 Changes in version 0.3.4.11 - 2019-02-21
7464 Tor 0.3.4.11 is the third stable release in its series. It includes
7465 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
7466 later. All Tor instances running an affected release should upgrade to
7467 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7469 o Major bugfixes (cell scheduler, KIST, security):
7470 - Make KIST consider the outbuf length when computing what it can
7471 put in the outbuf. Previously, KIST acted as though the outbuf
7472 were empty, which could lead to the outbuf becoming too full. It
7473 is possible that an attacker could exploit this bug to cause a Tor
7474 client or relay to run out of memory and crash. Fixes bug 29168;
7475 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7476 TROVE-2019-001 and CVE-2019-8955.
7478 o Minor features (geoip):
7479 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7480 Country database. Closes ticket 29478.
7482 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7483 - Update Cargo.lock file to match the version made by the latest
7484 version of Rust, so that "make distcheck" will pass again. Fixes
7485 bug 29244; bugfix on 0.3.3.4-alpha.
7487 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7488 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7489 as a warning. Instead, log it as a protocol warning, because there
7490 is nothing that relay operators can do to fix it. Fixes bug 29029;
7491 bugfix on 0.2.5.7-rc.
7494 Changes in version 0.3.3.12 - 2019-02-21
7495 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
7496 0.3.2.1-alpha and later. All Tor instances running an affected release
7497 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7499 This release marks the end of support for the Tor 0.3.3.x series. We
7500 recommend that users switch to either the Tor 0.3.4 series (supported
7501 until at least 10 June 2019), or the Tor 0.3.5 series, which will
7502 receive long-term support until at least 1 Feb 2022.
7504 o Major bugfixes (cell scheduler, KIST, security):
7505 - Make KIST consider the outbuf length when computing what it can
7506 put in the outbuf. Previously, KIST acted as though the outbuf
7507 were empty, which could lead to the outbuf becoming too full. It
7508 is possible that an attacker could exploit this bug to cause a Tor
7509 client or relay to run out of memory and crash. Fixes bug 29168;
7510 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7511 TROVE-2019-001 and CVE-2019-8955.
7513 o Minor features (geoip):
7514 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7515 Country database. Closes ticket 29478.
7517 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7518 - Update Cargo.lock file to match the version made by the latest
7519 version of Rust, so that "make distcheck" will pass again. Fixes
7520 bug 29244; bugfix on 0.3.3.4-alpha.
7522 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7523 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7524 as a warning. Instead, log it as a protocol warning, because there
7525 is nothing that relay operators can do to fix it. Fixes bug 29029;
7526 bugfix on 0.2.5.7-rc.
7529 Changes in version 0.4.0.2-alpha - 2019-02-21
7530 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
7531 bugs from earlier versions, including several that had broken
7532 backward compatibility.
7534 It also includes a fix for a medium-severity security bug affecting Tor
7535 0.3.2.1-alpha and later. All Tor instances running an affected release
7536 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7538 o Major bugfixes (cell scheduler, KIST, security):
7539 - Make KIST consider the outbuf length when computing what it can
7540 put in the outbuf. Previously, KIST acted as though the outbuf
7541 were empty, which could lead to the outbuf becoming too full. It
7542 is possible that an attacker could exploit this bug to cause a Tor
7543 client or relay to run out of memory and crash. Fixes bug 29168;
7544 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7545 TROVE-2019-001 and CVE-2019-8955.
7547 o Major bugfixes (networking):
7548 - Gracefully handle empty username/password fields in SOCKS5
7549 username/password auth messsage and allow SOCKS5 handshake to
7550 continue. Previously, we had rejected these handshakes, breaking
7551 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7553 o Major bugfixes (windows, startup):
7554 - When reading a consensus file from disk, detect whether it was
7555 written in text mode, and re-read it in text mode if so. Always
7556 write consensus files in binary mode so that we can map them into
7557 memory later. Previously, we had written in text mode, which
7558 confused us when we tried to map the file on windows. Fixes bug
7559 28614; bugfix on 0.4.0.1-alpha.
7561 o Minor features (compilation):
7562 - Compile correctly when OpenSSL is built with engine support
7563 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7564 Patches from "Mangix".
7566 o Minor features (developer tooling):
7567 - Check that bugfix versions in changes files look like Tor versions
7568 from the versions spec. Warn when bugfixes claim to be on a future
7569 release. Closes ticket 27761.
7570 - Provide a git pre-commit hook that disallows committing if we have
7571 any failures in our code and changelog formatting checks. It is
7572 now available in scripts/maint/pre-commit.git-hook. Implements
7575 o Minor features (directory authority):
7576 - When a directory authority is using a bandwidth file to obtain
7577 bandwidth values, include the digest of that file in the vote.
7578 Closes ticket 26698.
7580 o Minor features (geoip):
7581 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7582 Country database. Closes ticket 29478.
7584 o Minor features (testing):
7585 - Treat all unexpected ERR and BUG messages as test failures. Closes
7588 o Minor bugfixes (build, compatibility, rust):
7589 - Update Cargo.lock file to match the version made by the latest
7590 version of Rust, so that "make distcheck" will pass again. Fixes
7591 bug 29244; bugfix on 0.3.3.4-alpha.
7593 o Minor bugfixes (compilation):
7594 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
7595 29169; bugfix on 0.4.0.1-alpha.
7596 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
7597 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
7599 o Minor bugfixes (documentation):
7600 - Describe the contents of the v3 onion service client authorization
7601 files correctly: They hold public keys, not private keys. Fixes
7602 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7604 o Minor bugfixes (linux seccomp sandbox):
7605 - Fix startup crash when experimental sandbox support is enabled.
7606 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
7608 o Minor bugfixes (logging):
7609 - Avoid logging that we are relaxing a circuit timeout when that
7610 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
7611 - Log more information at "warning" level when unable to read a
7612 private key; log more information at "info" level when unable to
7613 read a public key. We had warnings here before, but they were lost
7614 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7616 o Minor bugfixes (misc):
7617 - The amount of total available physical memory is now determined
7618 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7619 when it is defined and a 64-bit variant is not available. Fixes
7620 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7622 o Minor bugfixes (onion services):
7623 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7624 than one private key for a hidden service. Fixes bug 29040; bugfix
7626 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7627 "debug" level. Tor used to log it as a warning, which caused very
7628 long log lines to appear for some users. Fixes bug 29135; bugfix
7630 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7631 as a warning. Instead, log it as a protocol warning, because there
7632 is nothing that relay operators can do to fix it. Fixes bug 29029;
7633 bugfix on 0.2.5.7-rc.
7635 o Minor bugfixes (scheduler):
7636 - When re-adding channels to the pending list, check the correct
7637 channel's sched_heap_idx. This issue has had no effect in mainline
7638 Tor, but could have led to bugs down the road in improved versions
7639 of our circuit scheduling code. Fixes bug 29508; bugfix
7642 o Minor bugfixes (tests):
7643 - Fix intermittent failures on an adaptive padding test. Fixes one
7644 case of bug 29122; bugfix on 0.4.0.1-alpha.
7645 - Disable an unstable circuit-padding test that was failing
7646 intermittently because of an ill-defined small histogram. Such
7647 histograms will be allowed again after 29298 is implemented. Fixes
7648 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
7649 - Detect and suppress "bug" warnings from the util/time test on
7650 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7651 - Do not log an error-level message if we fail to find an IPv6
7652 network interface from the unit tests. Fixes bug 29160; bugfix
7656 - In the manpage entry describing MapAddress torrc setting, use
7657 example IP addresses from ranges specified for use in documentation
7658 by RFC 5737. Resolves issue 28623.
7661 - Remove the old check-tor script. Resolves issue 29072.
7664 Changes in version 0.4.0.1-alpha - 2019-01-18
7665 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
7666 introduces improved features for power and bandwidth conservation,
7667 more accurate reporting of bootstrap progress for user interfaces, and
7668 an experimental backend for an exciting new adaptive padding feature.
7669 There is also the usual assortment of bugfixes and minor features, all
7672 o Major features (battery management, client, dormant mode):
7673 - When Tor is running as a client, and it is unused for a long time,
7674 it can now enter a "dormant" state. When Tor is dormant, it avoids
7675 network and CPU activity until it is reawoken either by a user
7676 request or by a controller command. For more information, see the
7677 configuration options starting with "Dormant". Implements tickets
7679 - The client's memory of whether it is "dormant", and how long it
7680 has spent idle, persists across invocations. Implements
7682 - There is a DormantOnFirstStartup option that integrators can use
7683 if they expect that in many cases, Tor will be installed but
7686 o Major features (bootstrap reporting):
7687 - When reporting bootstrap progress, report the first connection
7688 uniformly, regardless of whether it's a connection for building
7689 application circuits. This allows finer-grained reporting of early
7690 progress than previously possible, with the improvements of ticket
7691 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
7692 - When reporting bootstrap progress, treat connecting to a proxy or
7693 pluggable transport as separate from having successfully used that
7694 proxy or pluggable transport to connect to a relay. Closes tickets
7697 o Major features (circuit padding):
7698 - Implement preliminary support for the circuit padding portion of
7699 Proposal 254. The implementation supports Adaptive Padding (aka
7700 WTF-PAD) state machines for use between experimental clients and
7701 relays. Support is also provided for APE-style state machines that
7702 use probability distributions instead of histograms to specify
7703 inter-packet delay. At the moment, Tor does not provide any
7704 padding state machines that are used in normal operation: for now,
7705 this feature exists solely for experimentation. Closes
7708 o Major features (refactoring):
7709 - Tor now uses an explicit list of its own subsystems when
7710 initializing and shutting down. Previously, these systems were
7711 managed implicitly in various places throughout the codebase.
7712 (There may still be some subsystems using the old system.) Closes
7715 o Minor features (bootstrap reporting):
7716 - When reporting bootstrap progress, stop distinguishing between
7717 situations where only internal paths are available and situations
7718 where external paths are available. Previously, Tor would often
7719 erroneously report that it had only internal paths. Closes
7722 o Minor features (continuous integration):
7723 - Log Python version during each Travis CI job. Resolves
7726 o Minor features (controller):
7727 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
7728 Implements ticket 28843.
7730 o Minor features (developer tooling):
7731 - Provide a git hook script to prevent "fixup!" and "squash!"
7732 commits from ending up in the master branch, as scripts/main/pre-
7733 push.git-hook. Closes ticket 27993.
7735 o Minor features (directory authority):
7736 - Directory authorities support a new consensus algorithm, under
7737 which the family lines in microdescriptors are encoded in a
7738 canonical form. This change makes family lines more compressible
7739 in transit, and on the client. Closes ticket 28266; implements
7742 o Minor features (directory authority, relay):
7743 - Authorities now vote on a "StaleDesc" flag to indicate that a
7744 relay's descriptor is so old that the relay should upload again
7745 soon. Relays treat this flag as a signal to upload a new
7746 descriptor. This flag will eventually let us remove the
7747 'published' date from routerstatus entries, and make our consensus
7748 diffs much smaller. Closes ticket 26770; implements proposal 293.
7750 o Minor features (fallback directory mirrors):
7751 - Update the fallback whitelist based on operator opt-ins and opt-
7752 outs. Closes ticket 24805, patch by Phoul.
7754 o Minor features (FreeBSD):
7755 - On FreeBSD-based systems, warn relay operators if the
7756 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
7757 Closes ticket 28518.
7759 o Minor features (HTTP standards compliance):
7760 - Stop sending the header "Content-type: application/octet-stream"
7761 along with transparently compressed documents: this confused
7762 browsers. Closes ticket 28100.
7764 o Minor features (IPv6):
7765 - We add an option ClientAutoIPv6ORPort, to make clients randomly
7766 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
7767 every time a node is loaded from a new consensus or bridge config.
7768 We expect that this option will enable clients to bootstrap more
7769 quickly without having to determine whether they support IPv4,
7770 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
7771 - When using addrs_in_same_network_family(), avoid choosing circuit
7772 paths that pass through the same IPv6 subnet more than once.
7773 Previously, we only checked IPv4 subnets. Closes ticket 24393.
7774 Patch by Neel Chauhan.
7776 o Minor features (log messages):
7777 - Improve log message in v3 onion services that could print out
7778 negative revision counters. Closes ticket 27707. Patch
7781 o Minor features (memory usage):
7782 - Save memory by storing microdescriptor family lists with a more
7783 compact representation. Closes ticket 27359.
7784 - Tor clients now use mmap() to read consensus files from disk, so
7785 that they no longer need keep the full text of a consensus in
7786 memory when parsing it or applying a diff. Closes ticket 27244.
7788 o Minor features (parsing):
7789 - Directory authorities now validate that router descriptors and
7790 ExtraInfo documents are in a valid subset of UTF-8, and reject
7791 them if they are not. Closes ticket 27367.
7793 o Minor features (performance):
7794 - Cache the results of summarize_protocol_flags(), so that we don't
7795 have to parse the same protocol-versions string over and over.
7796 This should save us a huge number of malloc calls on startup, and
7797 may reduce memory fragmentation with some allocators. Closes
7799 - Remove a needless memset() call from get_token_arguments, thereby
7800 speeding up the tokenization of directory objects by about 20%.
7801 Closes ticket 28852.
7802 - Replace parse_short_policy() with a faster implementation, to
7803 improve microdescriptor parsing time. Closes ticket 28853.
7804 - Speed up directory parsing a little by avoiding use of the non-
7805 inlined strcmp_len() function. Closes ticket 28856.
7806 - Speed up microdescriptor parsing by about 30%, to help improve
7807 startup time. Closes ticket 28839.
7809 o Minor features (pluggable transports):
7810 - Add support for emitting STATUS updates to Tor's control port from
7811 a pluggable transport process. Closes ticket 28846.
7812 - Add support for logging to Tor's logging subsystem from a
7813 pluggable transport process. Closes ticket 28180.
7815 o Minor features (process management):
7816 - Add a new process API for handling child processes. This new API
7817 allows Tor to have bi-directional communication with child
7818 processes on both Unix and Windows. Closes ticket 28179.
7819 - Use the subsystem manager to initialize and shut down the process
7820 module. Closes ticket 28847.
7822 o Minor features (relay):
7823 - When listing relay families, list them in canonical form including
7824 the relay's own identity, and try to give a more useful set of
7825 warnings. Part of ticket 28266 and proposal 298.
7827 o Minor features (required protocols):
7828 - Before exiting because of a missing required protocol, Tor will
7829 now check the publication time of the consensus, and not exit
7830 unless the consensus is newer than the Tor program's own release
7831 date. Previously, Tor would not check the consensus publication
7832 time, and so might exit because of a missing protocol that might
7833 no longer be required in a current consensus. Implements proposal
7834 297; closes ticket 27735.
7836 o Minor features (testing):
7837 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
7838 networks. Closes ticket 28840. Patch by Rob Jansen.
7840 o Minor bugfixes (client, clock skew):
7841 - Bootstrap successfully even when Tor's clock is behind the clocks
7842 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
7843 - Select guards even if the consensus has expired, as long as the
7844 consensus is still reasonably live. Fixes bug 24661; bugfix
7847 o Minor bugfixes (compilation):
7848 - Compile correctly on OpenBSD; previously, we were missing some
7849 headers required in order to detect it properly. Fixes bug 28938;
7850 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7852 o Minor bugfixes (directory clients):
7853 - Mark outdated dirservers when Tor only has a reasonably live
7854 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7856 o Minor bugfixes (directory mirrors):
7857 - Even when a directory mirror's clock is behind the clocks on the
7858 authorities, we now allow the mirror to serve "future"
7859 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
7861 o Minor bugfixes (DNS):
7862 - Gracefully handle an empty or absent resolve.conf file by falling
7863 back to using "localhost" as a DNS server (and hoping it works).
7864 Previously, we would just stop running as an exit. Fixes bug
7865 21900; bugfix on 0.2.1.10-alpha.
7867 o Minor bugfixes (guards):
7868 - In count_acceptable_nodes(), the minimum number is now one bridge
7869 or guard node, and two non-guard nodes for a circuit. Previously,
7870 we had added up the sum of all nodes with a descriptor, but that
7871 could cause us to build failing circuits when we had either too
7872 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
7873 0.2.3.1-alpha. Patch by Neel Chauhan.
7875 o Minor bugfixes (IPv6):
7876 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7877 IPv6 socket was bound using an address family of AF_INET instead
7878 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7881 o Minor bugfixes (logging):
7882 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7883 link protocol versions when logging incoming/outgoing connection
7884 counts. Tor no longer skips version 5, and we won't have to
7885 remember to update this function when new link protocol version is
7886 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7888 o Minor bugfixes (networking):
7889 - Introduce additional checks into tor_addr_parse() to reject
7890 certain incorrect inputs that previously were not detected. Fixes
7891 bug 23082; bugfix on 0.2.0.10-alpha.
7893 o Minor bugfixes (onion service v3, client):
7894 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7895 connection waiting for a descriptor that we actually have in the
7896 cache. It turns out that this can actually happen, though it is
7897 rare. Now, tor will recover and retry the descriptor. Fixes bug
7898 28669; bugfix on 0.3.2.4-alpha.
7900 o Minor bugfixes (periodic events):
7901 - Refrain from calling routerlist_remove_old_routers() from
7902 check_descriptor_callback(). Instead, create a new hourly periodic
7903 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
7905 o Minor bugfixes (pluggable transports):
7906 - Make sure that data is continously read from standard output and
7907 standard error pipes of a pluggable transport child-process, to
7908 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
7909 bugfix on 0.2.3.6-alpha.
7911 o Minor bugfixes (unit tests):
7912 - Instead of relying on hs_free_all() to clean up all onion service
7913 objects in test_build_descriptors(), we now deallocate them one by
7914 one. This lets Coverity know that we are not leaking memory there
7915 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
7917 o Minor bugfixes (usability):
7918 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7919 Some users took this phrasing to mean that the mentioned guard was
7920 under their control or responsibility, which it is not. Fixes bug
7921 28895; bugfix on Tor 0.3.0.1-alpha.
7923 o Code simplification and refactoring:
7924 - Reimplement NETINFO cell parsing and generation to rely on
7925 trunnel-generated wire format handling code. Closes ticket 27325.
7926 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
7928 - Rework SOCKS wire format handling to rely on trunnel-generated
7929 parsing/generation code. Resolves ticket 27620.
7930 - Split out bootstrap progress reporting from control.c into a
7931 separate file. Part of ticket 27402.
7932 - The .may_include files that we use to describe our directory-by-
7933 directory dependency structure now describe a noncircular
7934 dependency graph over the directories that they cover. Our
7935 checkIncludes.py tool now enforces this noncircularity. Closes
7939 - Mention that you cannot add a new onion service if Tor is already
7940 running with Sandbox enabled. Closes ticket 28560.
7941 - Improve ControlPort documentation. Mention that it accepts
7942 address:port pairs, and can be used multiple times. Closes
7944 - Document the exact output of "tor --version". Closes ticket 28889.
7947 - Stop responding to the 'GETINFO status/version/num-concurring' and
7948 'GETINFO status/version/num-versioning' control port commands, as
7949 those were deprecated back in 0.2.0.30. Also stop listing them in
7950 output of 'GETINFO info/names'. Resolves ticket 28757.
7951 - The scripts used to generate and maintain the list of fallback
7952 directories have been extracted into a new "fallback-scripts"
7953 repository. Closes ticket 27914.
7956 - Run shellcheck for scripts in the in scripts/ directory. Closes
7958 - Add unit tests for tokenize_string() and get_next_token()
7959 functions. Resolves ticket 27625.
7961 o Code simplification and refactoring (onion service v3):
7962 - Consolidate the authorized client descriptor cookie computation
7963 code from client and service into one function. Closes
7966 o Code simplification and refactoring (shell scripts):
7967 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
7969 - Fix issues that shellcheck found in chutney-git-bisect.sh.
7970 Resolves ticket 28006.
7971 - Fix issues that shellcheck found in updateRustDependencies.sh.
7972 Resolves ticket 28012.
7973 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
7974 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
7975 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
7976 - Fix shellcheck warnings in scripts/test/coverage. Resolves
7980 Changes in version 0.3.3.11 - 2019-01-07
7981 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
7982 numerous fixes, including an important fix for anyone using OpenSSL
7983 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
7984 to this version, or to a later series.
7986 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
7987 We anticipate that this will be the last release of Tor 0.3.3, unless
7988 some major bug is before then. Some time between now and then, users
7989 should switch to either the Tor 0.3.4 series (supported until at least
7990 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
7991 support until at least 1 Feb 2022.
7993 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
7994 - Fix our usage of named groups when running as a TLS 1.3 client in
7995 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7996 running as a relay, which caused clients to fail to negotiate TLS
7997 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8000 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8001 - Fix a use-after-free error that could be caused by passing Tor an
8002 impossible set of options that would fail during options_act().
8003 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8005 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8006 - Only run one online rust build in Travis, to reduce network
8007 errors. Skip offline rust builds on Travis for Linux gcc, because
8008 they're redundant. Implements ticket 27252.
8009 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8010 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8011 Linux with default settings, because all the non-default builds
8012 use gcc on Linux. Implements ticket 27252.
8014 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8015 - Use the Travis Homebrew addon to install packages on macOS during
8016 Travis CI. The package list is the same, but the Homebrew addon
8017 does not do a `brew update` by default. Implements ticket 27738.
8019 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8020 - Replace the 150 fallbacks originally introduced in Tor
8021 0.3.3.1-alpha in January 2018 (of which ~115 were still
8022 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8023 removed) generated in December 2018. Closes ticket 24803.
8025 o Minor features (geoip):
8026 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8027 Country database. Closes ticket 29012.
8029 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8030 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8031 key export function from handling long labels. When this bug is
8032 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8033 version of OpenSSL without this bug when it becomes available.
8034 Closes ticket 28973.
8036 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8037 - Update relay descriptor on bandwidth changes only when the uptime
8038 is smaller than 24h, in order to reduce the efficiency of guard
8039 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8041 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
8042 - Avoid undefined behavior in an end-of-string check when parsing
8043 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8046 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8047 - Rewrite our assertion macros so that they no longer suppress the
8048 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8050 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8051 - Initialize a variable unconditionally in aes_new_cipher(), since
8052 some compilers cannot tell that we always initialize it before
8053 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8055 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
8056 - Log additional info when we get a relay that shares an ed25519 ID
8057 with a different relay, instead making a BUG() warning. Fixes bug
8058 27800; bugfix on 0.3.2.1-alpha.
8060 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8061 - When a user requests a group-readable DataDirectory, give it to
8062 them. Previously, when the DataDirectory and the CacheDirectory
8063 were the same, the default setting (0) for
8064 CacheDirectoryGroupReadable would override the setting for
8065 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8068 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8069 - When the onion service directory can't be created or has the wrong
8070 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8073 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8074 - Close all SOCKS request (for the same .onion) if the newly fetched
8075 descriptor is unusable. Before that, we would close only the first
8076 one leaving the other hanging and let to time out by themselves.
8077 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8079 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8080 - Don't warn so loudly when Tor is unable to decode an onion
8081 descriptor. This can now happen as a normal use case if a client
8082 gets a descriptor with client authorization but the client is not
8083 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8085 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8086 - When deleting an ephemeral onion service (DEL_ONION), do not close
8087 any rendezvous circuits in order to let the existing client
8088 connections finish by themselves or closed by the application. The
8089 HS v2 is doing that already so now we have the same behavior for
8090 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8092 o Minor bugfixes (HTTP tunnel):
8093 - Fix a bug warning when closing an HTTP tunnel connection due to
8094 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
8097 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8098 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8099 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8101 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8102 - Ensure circuitmux queues are empty before scheduling or sending
8103 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8105 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8106 - Reject protocol names containing bytes other than alphanumeric
8107 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8110 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8111 - Compute protover votes correctly in the rust version of the
8112 protover code. Previously, the protover rewrite in 24031 allowed
8113 repeated votes from the same voter for the same protocol version
8114 to be counted multiple times in protover_compute_vote(). Fixes bug
8115 27649; bugfix on 0.3.3.5-rc.
8116 - Reject protover names that contain invalid characters. Fixes bug
8117 27687; bugfix on 0.3.3.1-alpha.
8119 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8120 - protover_all_supported() would attempt to allocate up to 16GB on
8121 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8122 bugfix on 0.3.3.5-rc.
8124 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
8125 - Fix a potential null dereference in protover_all_supported(). Add
8126 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8127 - Return a string that can be safely freed by C code, not one
8128 created by the rust allocator, in protover_all_supported(). Fixes
8129 bug 27740; bugfix on 0.3.3.1-alpha.
8130 - Fix an API mismatch in the rust implementation of
8131 protover_compute_vote(). This bug could have caused crashes on any
8132 directory authorities running Tor with Rust (which we do not yet
8133 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8135 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8136 - If a unit test running in a subprocess exits abnormally or with a
8137 nonzero status code, treat the test as having failed, even if the
8138 test reported success. Without this fix, memory leaks don't cause
8139 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8140 bugfix on 0.2.2.4-alpha.
8142 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
8143 - Treat backtrace test failures as expected on BSD-derived systems
8144 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8145 (FreeBSD failures have been treated as expected since 18204 in
8146 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8148 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8149 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8150 bugfix on 0.3.0.1-alpha.
8153 Changes in version 0.3.4.10 - 2019-01-07
8154 Tor 0.3.4.9 is the second stable release in its series; it backports
8155 numerous fixes, including an important fix for relays, and for anyone
8156 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
8159 As a reminder, the Tor 0.3.4 series will be supported until 10 June
8160 2019. Some time between now and then, users should switch to the Tor
8161 0.3.5 series, which will receive long-term support until at least 1
8164 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
8165 - Fix our usage of named groups when running as a TLS 1.3 client in
8166 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8167 running as a relay, which caused clients to fail to negotiate TLS
8168 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8171 o Major bugfixes (relay, directory, backport from 0.3.5.7):
8172 - Always reactivate linked connections in the main loop so long as
8173 any linked connection has been active. Previously, connections
8174 serving directory information wouldn't get reactivated after the
8175 first chunk of data was sent (usually 32KB), which would prevent
8176 clients from bootstrapping. Fixes bug 28912; bugfix on
8177 0.3.4.1-alpha. Patch by "cypherpunks3".
8179 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
8180 - Always show the configure and test logs, and upload them as build
8181 artifacts, when building for Windows using Appveyor CI.
8184 o Minor features (controller, backport from 0.3.5.1-alpha):
8185 - For purposes of CIRC_BW-based dropped cell detection, track half-
8186 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8187 bias check cells to arrive without counting it as dropped until
8188 either the END arrives, or the windows are empty. Closes
8191 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
8192 - Replace the 150 fallbacks originally introduced in Tor
8193 0.3.3.1-alpha in January 2018 (of which ~115 were still
8194 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8195 removed) generated in December 2018. Closes ticket 24803.
8197 o Minor features (geoip):
8198 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8199 Country database. Closes ticket 28395.
8201 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
8202 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8203 key export function from handling long labels. When this bug is
8204 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8205 version of OpenSSL without this bug when it becomes available.
8206 Closes ticket 28973.
8208 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
8209 - Initialize a variable unconditionally in aes_new_cipher(), since
8210 some compilers cannot tell that we always initialize it before
8211 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8213 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
8214 - Avoid a logging a BUG() stacktrace when closing connection held
8215 open because the write side is rate limited but not the read side.
8216 Now, the connection read side is simply shut down until Tor is
8217 able to flush the connection and close it. Fixes bug 27750; bugfix
8220 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
8221 - Manually configure the zstd compiler options, when building using
8222 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8223 not come with a pkg-config file. Fixes bug 28454; bugfix
8225 - Stop using an external OpenSSL install, and stop installing MSYS2
8226 packages, when building using mingw on Appveyor Windows CI. Fixes
8227 bug 28399; bugfix on 0.3.4.1-alpha.
8229 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
8230 - Explicitly specify the path to the OpenSSL library and do not
8231 download OpenSSL from Pacman, but instead use the library that is
8232 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8234 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
8235 - When a user requests a group-readable DataDirectory, give it to
8236 them. Previously, when the DataDirectory and the CacheDirectory
8237 were the same, the default setting (0) for
8238 CacheDirectoryGroupReadable would override the setting for
8239 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8242 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
8243 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8244 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8246 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8247 - Don't warn so loudly when Tor is unable to decode an onion
8248 descriptor. This can now happen as a normal use case if a client
8249 gets a descriptor with client authorization but the client is not
8250 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8252 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
8253 - When deleting an ephemeral onion service (DEL_ONION), do not close
8254 any rendezvous circuits in order to let the existing client
8255 connections finish by themselves or closed by the application. The
8256 HS v2 is doing that already so now we have the same behavior for
8257 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8259 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
8260 - Update relay descriptor on bandwidth changes only when the uptime
8261 is smaller than 24h, in order to reduce the efficiency of guard
8262 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8264 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
8265 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8266 bugfix on 0.3.0.1-alpha.
8269 Changes in version 0.3.5.7 - 2019-01-07
8270 Tor 0.3.5.7 is the first stable release in its series; it includes
8271 compilation and portability fixes, and a fix for a severe problem
8272 affecting directory caches.
8274 The Tor 0.3.5 series includes several new features and performance
8275 improvements, including client authorization for v3 onion services,
8276 cleanups to bootstrap reporting, support for improved bandwidth-
8277 measurement tools, experimental support for NSS in place of OpenSSL,
8278 and much more. It also begins a full reorganization of Tor's code
8279 layout, for improved modularity and maintainability in the future.
8280 Finally, there is the usual set of performance improvements and
8281 bugfixes that we try to do in every release series.
8283 There are a couple of changes in the 0.3.5 that may affect
8284 compatibility. First, the default version for newly created onion
8285 services is now v3. Use the HiddenServiceVersion option if you want to
8286 override this. Second, some log messages related to bootstrapping have
8287 changed; if you use stem, you may need to update to the latest version
8288 so it will recognize them.
8290 We have designated 0.3.5 as a "long-term support" (LTS) series: we
8291 will continue to patch major bugs in typical configurations of 0.3.5
8292 until at least 1 Feb 2022. (We do not plan to provide long-term
8293 support for embedding, Rust support, NSS support, running a directory
8294 authority, or unsupported platforms. For these, you will need to stick
8295 with the latest stable release.)
8297 Below are the changes since 0.3.5.6-rc. For a complete list of changes
8298 since 0.3.4.9, see the ReleaseNotes file.
8300 o Major bugfixes (relay, directory):
8301 - Always reactivate linked connections in the main loop so long as
8302 any linked connection has been active. Previously, connections
8303 serving directory information wouldn't get reactivated after the
8304 first chunk of data was sent (usually 32KB), which would prevent
8305 clients from bootstrapping. Fixes bug 28912; bugfix on
8306 0.3.4.1-alpha. Patch by "cypherpunks3".
8308 o Minor features (compilation):
8309 - When possible, place our warning flags in a separate file, to
8310 avoid flooding verbose build logs. Closes ticket 28924.
8312 o Minor features (geoip):
8313 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
8314 Country database. Closes ticket 29012.
8316 o Minor features (OpenSSL bug workaround):
8317 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
8318 key export function from handling long labels. When this bug is
8319 detected, Tor will disable TLS 1.3. We recommend upgrading to a
8320 version of OpenSSL without this bug when it becomes available.
8321 Closes ticket 28973.
8323 o Minor features (performance):
8324 - Remove about 96% of the work from the function that we run at
8325 startup to test our curve25519_basepoint implementation. Since
8326 this function has yet to find an actual failure, we now only run
8327 it for 8 iterations instead of 200. Based on our profile
8328 information, this change should save around 8% of our startup time
8329 on typical desktops, and may have a similar effect on other
8330 platforms. Closes ticket 28838.
8331 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8332 every startup. Doing this wasted time and cycles, especially on
8333 low-powered devices. Closes ticket 28851.
8335 o Minor bugfixes (compilation):
8336 - Fix compilation for Android by adding a missing header to
8337 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8339 o Minor bugfixes (correctness):
8340 - Fix an unreached code path where we checked the value of
8341 "hostname" inside send_resolved_hostname_cell(). Previously, we
8342 used it before checking it; now we check it first. Fixes bug
8343 28879; bugfix on 0.1.2.7-alpha.
8345 o Minor bugfixes (testing):
8346 - Make sure that test_rebind.py actually obeys its timeout, even
8347 when it receives a large number of log messages. Fixes bug 28883;
8348 bugfix on 0.3.5.4-alpha.
8349 - Stop running stem's unit tests as part of "make test-stem", but
8350 continue to run stem's unit and online tests during "make test-
8351 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
8353 o Minor bugfixes (windows services):
8354 - Make Tor start correctly as an NT service again: previously it was
8355 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
8357 o Code simplification and refactoring:
8358 - When parsing a port configuration, make it more obvious to static
8359 analyzer tools that we always initialize the address. Closes
8363 Changes in version 0.3.5.6-rc - 2018-12-18
8364 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
8365 It is the first release candidate in the 0.3.5.x series; if no further
8366 huge bugs are found, our next release may be the stable 0.3.5.x.
8368 o Minor features (continuous integration, Windows):
8369 - Always show the configure and test logs, and upload them as build
8370 artifacts, when building for Windows using Appveyor CI.
8373 o Minor features (fallback directory list):
8374 - Replace the 150 fallbacks originally introduced in Tor
8375 0.3.3.1-alpha in January 2018 (of which ~115 were still
8376 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8377 removed) generated in December 2018. Closes ticket 24803.
8379 o Minor features (geoip):
8380 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
8381 Country database. Closes ticket 28744.
8383 o Minor bugfixes (compilation):
8384 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
8385 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
8387 o Minor bugfixes (continuous integration, Windows):
8388 - Explicitly specify the path to the OpenSSL library and do not
8389 download OpenSSL from Pacman, but instead use the library that is
8390 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8392 o Minor bugfixes (onion service v3):
8393 - When deleting an ephemeral onion service (DEL_ONION), do not close
8394 any rendezvous circuits in order to let the existing client
8395 connections finish by themselves or closed by the application. The
8396 HS v2 is doing that already so now we have the same behavior for
8397 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8399 o Minor bugfixes (restart-in-process, boostrap):
8400 - Add missing resets of bootstrap tracking state when shutting down
8401 (regression caused by ticket 27169). Fixes bug 28524; bugfix
8404 o Minor bugfixes (testing):
8405 - Use a separate DataDirectory for the test_rebind script.
8406 Previously, this script would run using the default DataDirectory,
8407 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
8408 Patch from Taylor R Campbell.
8409 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8410 bugfix on 0.3.0.1-alpha.
8412 o Minor bugfixes (Windows):
8413 - Correctly identify Windows 8.1, Windows 10, and Windows Server
8414 2008 and later from their NT versions. Fixes bug 28096; bugfix on
8415 0.2.2.34; reported by Keifer Bly.
8416 - On recent Windows versions, the GetVersionEx() function may report
8417 an earlier Windows version than the running OS. To avoid user
8418 confusion, add "[or later]" to Tor's version string on affected
8419 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
8421 - Remove Windows versions that were never supported by the
8422 GetVersionEx() function. Stop duplicating the latest Windows
8423 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
8424 reported by Keifer Bly.
8427 - Increase logging and tag all log entries with timestamps in
8428 test_rebind.py. Provides diagnostics for issue 28229.
8430 o Code simplification and refactoring (shared random, dirauth):
8431 - Change many tor_assert() to use BUG() instead. The idea is to not
8432 crash a dirauth but rather scream loudly with a stacktrace and let
8433 it continue run. The shared random subsystem is very resilient and
8434 if anything wrong happens with it, at worst a non coherent value
8435 will be put in the vote and discarded by the other authorities.
8436 Closes ticket 19566.
8438 o Documentation (onion services):
8439 - Document in the man page that changing ClientOnionAuthDir value or
8440 adding a new file in the directory will not work at runtime upon
8441 sending a HUP if Sandbox 1. Closes ticket 28128.
8442 - Note in the man page that the only real way to fully revoke an
8443 onion service v3 client authorization is by restarting the tor
8444 process. Closes ticket 28275.
8447 Changes in version 0.3.5.5-alpha - 2018-11-16
8448 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
8449 including several that we hope to backport to older release series in
8452 o Major bugfixes (OpenSSL, portability):
8453 - Fix our usage of named groups when running as a TLS 1.3 client in
8454 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8455 running as a relay, which caused clients to fail to negotiate TLS
8456 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8459 o Minor features (geoip):
8460 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8461 Country database. Closes ticket 28395.
8463 o Minor bugfixes (compilation):
8464 - Initialize a variable unconditionally in aes_new_cipher(), since
8465 some compilers cannot tell that we always initialize it before
8466 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8468 o Minor bugfixes (connection, relay):
8469 - Avoid a logging a BUG() stacktrace when closing connection held
8470 open because the write side is rate limited but not the read side.
8471 Now, the connection read side is simply shut down until Tor is
8472 able to flush the connection and close it. Fixes bug 27750; bugfix
8475 o Minor bugfixes (continuous integration, Windows):
8476 - Manually configure the zstd compiler options, when building using
8477 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8478 not come with a pkg-config file. Fixes bug 28454; bugfix
8480 - Stop using an external OpenSSL install, and stop installing MSYS2
8481 packages, when building using mingw on Appveyor Windows CI. Fixes
8482 bug 28399; bugfix on 0.3.4.1-alpha.
8484 o Minor bugfixes (documentation):
8485 - Make Doxygen work again after the code movement in the 0.3.5
8486 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
8488 o Minor bugfixes (Linux seccomp2 sandbox):
8489 - Permit the "shutdown()" system call, which is apparently used by
8490 OpenSSL under some circumstances. Fixes bug 28183; bugfix
8493 o Minor bugfixes (logging):
8494 - Stop talking about the Named flag in log messages. Clients have
8495 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
8498 o Minor bugfixes (memory leaks):
8499 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8500 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8502 o Minor bugfixes (onion services):
8503 - On an intro point for a version 3 onion service, stop closing
8504 introduction circuits on an NACK. This lets the client decide
8505 whether to reuse the circuit or discard it. Previously, we closed
8506 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
8507 0.3.2.1-alpha. Patch by Neel Chaunan.
8508 - When replacing a descriptor in the client cache, make sure to
8509 close all client introduction circuits for the old descriptor, so
8510 we don't end up with unusable leftover circuits. Fixes bug 27471;
8511 bugfix on 0.3.2.1-alpha.
8514 Changes in version 0.3.5.4-alpha - 2018-11-08
8515 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
8516 improves our continuous integration support. It continues our attempts
8517 to stabilize this alpha branch and build it into a foundation for an
8518 acceptable long-term-support release.
8520 o Major bugfixes (compilation, rust):
8521 - Rust tests can now build and run successfully with the
8522 --enable-fragile-hardening option enabled. Doing this currently
8523 requires the rust beta channel; it will be possible with stable
8524 rust once Rust version 1.31 is released. Patch from Alex Crichton.
8525 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
8527 o Major bugfixes (embedding, main loop):
8528 - When DisableNetwork becomes set, actually disable periodic events
8529 that are already enabled. (Previously, we would refrain from
8530 enabling new ones, but we would leave the old ones turned on.)
8531 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
8533 o Minor features (continuous integration):
8534 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
8536 - Add new CI job to Travis configuration to run stem-based
8537 integration tests. Closes ticket 27913.
8539 o Minor features (Windows, continuous integration):
8540 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
8541 Appveyor's CI. Closes ticket 28318.
8543 o Minor bugfixes (C correctness, also in 0.3.4.9):
8544 - Avoid undefined behavior in an end-of-string check when parsing
8545 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8548 o Minor bugfixes (compilation):
8549 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
8550 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8552 o Minor bugfixes (compilation, OpenSolaris):
8553 - Fix compilation on OpenSolaris and its descendants by adding a
8554 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
8557 o Minor bugfixes (configuration):
8558 - Refuse to start with relative file paths and RunAsDaemon set
8559 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
8562 o Minor bugfixes (directory authority, also in 0.3.4.9):
8563 - Log additional info when we get a relay that shares an ed25519 ID
8564 with a different relay, instead of a BUG() warning with a
8565 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
8567 o Minor bugfixes (onion service v3):
8568 - Build the service descriptor's signing key certificate before
8569 uploading, so we always have a fresh one: leaving no chances for
8570 it to expire service side. Fixes bug 27838; bugfix
8573 o Minor bugfixes (onion service v3, client authorization):
8574 - Fix an assert() when adding a client authorization for the first
8575 time and then sending a HUP signal to the service. Before that,
8576 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
8578 o Minor bugfixes (onion services):
8579 - Unless we have explicitly set HiddenServiceVersion, detect the
8580 onion service version and then look for invalid options.
8581 Previously, we did the reverse, but that broke existing configs
8582 which were pointed to a v2 service and had options like
8583 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
8584 0.3.5.1-alpha. Patch by Neel Chauhan.
8586 o Minor bugfixes (portability):
8587 - Make the OPE code (which is used for v3 onion services) run
8588 correctly on big-endian platforms. Fixes bug 28115; bugfix
8591 o Minor bugfixes (protover, rust):
8592 - Reject extra commas in version strings. Fixes bug 27197; bugfix
8595 o Minor bugfixes (relay shutdown, systemd):
8596 - Notify systemd of ShutdownWaitLength so it can be set to longer
8597 than systemd's TimeoutStopSec. In Tor's systemd service file, set
8598 TimeoutSec to 60 seconds to allow Tor some time to shut down.
8599 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
8601 o Minor bugfixes (rust, also in 0.3.4.9):
8602 - Fix a potential null dereference in protover_all_supported(). Add
8603 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8604 - Return a string that can be safely freed by C code, not one
8605 created by the rust allocator, in protover_all_supported(). Fixes
8606 bug 27740; bugfix on 0.3.3.1-alpha.
8608 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
8609 - Fix an API mismatch in the rust implementation of
8610 protover_compute_vote(). This bug could have caused crashes on any
8611 directory authorities running Tor with Rust (which we do not yet
8612 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8614 o Minor bugfixes (testing):
8615 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
8616 27968; bugfix on 0.3.5.1-alpha.
8618 o Minor bugfixes (testing, also in 0.3.4.9):
8619 - Treat backtrace test failures as expected on BSD-derived systems
8620 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8621 (FreeBSD failures have been treated as expected since 18204 in
8622 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8624 o Documentation (onion service manpage):
8625 - Improve HSv3 client authorization by making some options more
8626 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
8629 Changes in version 0.3.4.9 - 2018-11-02
8630 Tor 0.3.4.9 is the second stable release in its series; it backports
8631 numerous fixes, including a fix for a bandwidth management bug that
8632 was causing memory exhaustion on relays. Anyone running an earlier
8633 version of Tor 0.3.4.9 should upgrade.
8635 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
8636 - Fix compilation on ARM (and other less-used CPUs) when compiling
8637 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8639 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
8640 - Make sure Tor bootstraps and works properly if only the
8641 ControlPort is set. Prior to this fix, Tor would only bootstrap
8642 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8643 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8645 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
8646 - When our write bandwidth limit is exhausted, stop writing on the
8647 connection. Previously, we had a typo in the code that would make
8648 us stop reading instead, leading to relay connections being stuck
8649 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8652 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8653 - Fix a use-after-free error that could be caused by passing Tor an
8654 impossible set of options that would fail during options_act().
8655 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8657 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8658 - Don't do a distcheck with --disable-module-dirauth in Travis.
8659 Implements ticket 27252.
8660 - Only run one online rust build in Travis, to reduce network
8661 errors. Skip offline rust builds on Travis for Linux gcc, because
8662 they're redundant. Implements ticket 27252.
8663 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8664 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8665 Linux with default settings, because all the non-default builds
8666 use gcc on Linux. Implements ticket 27252.
8668 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8669 - Use the Travis Homebrew addon to install packages on macOS during
8670 Travis CI. The package list is the same, but the Homebrew addon
8671 does not do a `brew update` by default. Implements ticket 27738.
8673 o Minor features (geoip):
8674 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8675 Country database. Closes ticket 27991.
8677 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
8678 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8679 difference algorithm for 32-bit Apple platforms. Previously, it
8680 would overflow when calculating the difference between two times
8681 more than 47 days apart. Fixes part of bug 27139; bugfix
8683 - Improve the precision of our 32-bit millisecond difference
8684 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8685 bugfix on 0.3.4.1-alpha.
8686 - Relax the tolerance on the mainloop/update_time_jumps test when
8687 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8690 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
8691 - Avoid undefined behavior in an end-of-string check when parsing
8692 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8695 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
8696 - Only install the necessary mingw packages during our appveyor
8697 builds. This change makes the build a little faster, and prevents
8698 a conflict with a preinstalled mingw openssl that appveyor now
8699 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
8701 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8702 - Rewrite our assertion macros so that they no longer suppress the
8703 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8705 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
8706 - Stop reinstalling identical packages in our Windows CI. Fixes bug
8707 27464; bugfix on 0.3.4.1-alpha.
8709 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
8710 - Log additional info when we get a relay that shares an ed25519 ID
8711 with a different relay, instead making a BUG() warning. Fixes bug
8712 27800; bugfix on 0.3.2.1-alpha.
8714 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
8715 - Avoid a double-close when shutting down a stalled directory
8716 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8718 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
8719 - Fix a bug warning when closing an HTTP tunnel connection due to an
8720 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8723 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8724 - Ensure circuitmux queues are empty before scheduling or sending
8725 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8727 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8728 - When the onion service directory can't be created or has the wrong
8729 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8732 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8733 - Close all SOCKS request (for the same .onion) if the newly fetched
8734 descriptor is unusable. Before that, we would close only the first
8735 one leaving the other hanging and let to time out by themselves.
8736 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8738 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8739 - When selecting a v3 rendezvous point, don't only look at the
8740 protover, but also check whether the curve25519 onion key is
8741 present. This way we avoid picking a relay that supports the v3
8742 rendezvous but for which we don't have the microdescriptor. Fixes
8743 bug 27797; bugfix on 0.3.2.1-alpha.
8745 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8746 - Reject protocol names containing bytes other than alphanumeric
8747 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8750 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8751 - Compute protover votes correctly in the rust version of the
8752 protover code. Previously, the protover rewrite in 24031 allowed
8753 repeated votes from the same voter for the same protocol version
8754 to be counted multiple times in protover_compute_vote(). Fixes bug
8755 27649; bugfix on 0.3.3.5-rc.
8756 - Reject protover names that contain invalid characters. Fixes bug
8757 27687; bugfix on 0.3.3.1-alpha.
8759 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8760 - protover_all_supported() would attempt to allocate up to 16GB on
8761 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8762 bugfix on 0.3.3.5-rc.
8764 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
8765 - Fix an API mismatch in the rust implementation of
8766 protover_compute_vote(). This bug could have caused crashes on any
8767 directory authorities running Tor with Rust (which we do not yet
8768 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8770 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
8771 - Fix a potential null dereference in protover_all_supported(). Add
8772 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8773 - Return a string that can be safely freed by C code, not one
8774 created by the rust allocator, in protover_all_supported(). Fixes
8775 bug 27740; bugfix on 0.3.3.1-alpha.
8777 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8778 - If a unit test running in a subprocess exits abnormally or with a
8779 nonzero status code, treat the test as having failed, even if the
8780 test reported success. Without this fix, memory leaks don't cause
8781 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8782 bugfix on 0.2.2.4-alpha.
8784 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
8785 - Make the hs_service tests use the same time source when creating
8786 the introduction point and when testing it. Now tests work better
8787 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8790 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
8791 - Treat backtrace test failures as expected on BSD-derived systems
8792 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8793 (FreeBSD failures have been treated as expected since 18204 in
8794 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8797 Changes in version 0.3.5.3-alpha - 2018-10-17
8798 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
8799 versions. One important fix for relays addresses a problem with rate-
8800 limiting code from back in 0.3.4.x: If the fix works out, we'll be
8801 backporting it soon. This release is still an alpha, but we hope it's
8802 getting closer and closer to stability.
8804 o Major features (onion services):
8805 - Version 3 onion services can now use the per-service
8806 HiddenServiceExportCircuitID option to differentiate client
8807 circuits. It communicates with the service by using the HAProxy
8808 protocol to assign virtual IP addresses to inbound client
8809 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
8811 o Major bugfixes (compilation):
8812 - Fix compilation on ARM (and other less-used CPUs) when compiling
8813 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8815 o Major bugfixes (initialization, crash):
8816 - Fix an assertion crash that would stop Tor from starting up if it
8817 tried to activate a periodic event too early. Fixes bug 27861;
8818 bugfix on 0.3.5.1-alpha.
8820 o Major bugfixes (mainloop, bootstrap):
8821 - Make sure Tor bootstraps and works properly if only the
8822 ControlPort is set. Prior to this fix, Tor would only bootstrap
8823 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8824 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8826 o Major bugfixes (relay):
8827 - When our write bandwidth limit is exhausted, stop writing on the
8828 connection. Previously, we had a typo in the code that would make
8829 us stop reading instead, leading to relay connections being stuck
8830 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8833 o Minor features (continuous integration):
8834 - Use the Travis Homebrew addon to install packages on macOS during
8835 Travis CI. The package list is the same, but the Homebrew addon
8836 does not do a `brew update` by default. Implements ticket 27738.
8837 - Report what program produced the mysterious core file that we
8838 occasionally see on Travis CI during make distcheck. Closes
8841 o Minor features (geoip):
8842 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8843 Country database. Closes ticket 27991.
8845 o Minor bugfixes (code safety):
8846 - Rewrite our assertion macros so that they no longer suppress the
8847 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8850 o Minor bugfixes (compilation):
8851 - Compile the ed25519-donna code with a correct declaration of
8852 crypto_strongest_rand(). Previously, we built it with one type,
8853 but linked it against another in the unit tests, which caused
8854 compilation failures with LTO enabled. This could have caused
8855 other undefined behavior in the tests. Fixes bug 27728; bugfix
8858 o Minor bugfixes (compilation, netbsd):
8859 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
8862 o Minor bugfixes (continuous integration, appveyor):
8863 - Install only the necessary mingw packages during our appveyor
8864 builds. This change makes the build a little faster, and prevents
8865 a conflict with a preinstalled mingw openssl that appveyor now
8866 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
8868 o Minor bugfixes (directory permissions):
8869 - When a user requests a group-readable DataDirectory, give it to
8870 them. Previously, when the DataDirectory and the CacheDirectory
8871 were the same, the default setting (0) for
8872 CacheDirectoryGroupReadable would override the setting for
8873 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8876 o Minor bugfixes (memory leaks):
8877 - Fix a small memory leak when calling Tor with --dump-config. Fixes
8878 bug 27893; bugfix on 0.3.2.1-alpha.
8880 o Minor bugfixes (networking):
8881 - In retry_listeners_ports(), make sure that we're removing a member
8882 of old_conns smartlist at most once. Fixes bug 27808; bugfix
8884 - Refrain from attempting socket rebinding when old and new
8885 listeners are in different address families. Fixes bug 27928;
8886 bugfix on 0.3.5.1-alpha.
8888 o Minor bugfixes (onion service v3):
8889 - Stop dumping a stack trace when trying to connect to an intro
8890 point without having a descriptor for it. Fixes bug 27774; bugfix
8892 - Don't warn so loudly when Tor is unable to decode an onion
8893 descriptor. This can now happen as a normal use case if a client
8894 gets a descriptor with client authorization but the client is not
8895 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8896 - When selecting a v3 rendezvous point, don't only look at the
8897 protover, but also check whether the curve25519 onion key is
8898 present. This way we avoid picking a relay that supports the v3
8899 rendezvous but for which we don't have the microdescriptor. Fixes
8900 bug 27797; bugfix on 0.3.2.1-alpha.
8902 o Minor bugfixes (protover):
8903 - Reject protocol names containing bytes other than alphanumeric
8904 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8907 o Minor bugfixes (testing):
8908 - Make the hs_service tests use the same time source when creating
8909 the introduction point and when testing it. Now tests work better
8910 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8912 - In test_rebind.py, check if the Python version is in the supported
8913 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
8915 o Code simplification and refactoring:
8916 - Divide more large Tor source files -- especially ones that span
8917 multiple areas of functionality -- into smaller parts, including
8918 onion.c and main.c. Closes ticket 26747.
8919 - Divide the "routerparse.c" module into separate modules for each
8920 group of parsed objects. Closes ticket 27924.
8921 - Move protover_rust.c to the same place protover.c was moved to.
8922 Closes ticket 27814.
8923 - Split directory.c into separate pieces for client, server, and
8924 common functionality. Closes ticket 26744.
8925 - Split the non-statistics-related parts from the rephist.c and
8926 geoip.c modules. Closes ticket 27892.
8927 - Split the router.c file into relay-only and shared components, to
8928 help with future modularization. Closes ticket 27864.
8931 - In the tor-resolve(1) manpage, fix the reference to socks-
8932 extensions.txt by adding a web URL. Resolves ticket 27853.
8933 - Mention that we require Python to be 2.7 or newer for some
8934 integration tests that we ship with Tor. Resolves ticket 27677.
8937 Changes in version 0.3.5.2-alpha - 2018-09-21
8938 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
8939 that made Tor think it had run out of sockets. Anybody running a relay
8940 or an onion service on 0.3.5.1-alpha should upgrade.
8942 o Major bugfixes (relay bandwidth statistics):
8943 - When we close relayed circuits, report the data in the circuit
8944 queues as being written in our relay bandwidth stats. This
8945 mitigates guard discovery and other attacks that close circuits
8946 for the explicit purpose of noticing this discrepancy in
8947 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
8949 o Major bugfixes (socket accounting):
8950 - In our socket accounting code, count a socket as closed even when
8951 it is closed indirectly by the TLS layer. Previously, we would
8952 count these sockets as still in use, and incorrectly believe that
8953 we had run out of sockets. Fixes bug 27795; bugfix
8956 o Minor bugfixes (32-bit OSX and iOS, timing):
8957 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8958 difference algorithm for 32-bit Apple platforms. Previously, it
8959 would overflow when calculating the difference between two times
8960 more than 47 days apart. Fixes part of bug 27139; bugfix
8962 - Improve the precision of our 32-bit millisecond difference
8963 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8964 bugfix on 0.3.4.1-alpha.
8965 - Relax the tolerance on the mainloop/update_time_jumps test when
8966 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8969 o Minor bugfixes (onion service v3):
8970 - Close all SOCKS request (for the same .onion) if the newly fetched
8971 descriptor is unusable. Before that, we would close only the first
8972 one leaving the other hanging and let to time out by themselves.
8973 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8975 o Minor bugfixes (memory leak):
8976 - Fix an unlikely memory leak when trying to read a private key from
8977 a ridiculously large file. Fixes bug 27764; bugfix on
8978 0.3.5.1-alpha. This is CID 1439488.
8980 o Minor bugfixes (NSS):
8981 - Correctly detect failure to open a dummy TCP socket when stealing
8982 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
8985 o Minor bugfixes (rust):
8986 - protover_all_supported() would attempt to allocate up to 16GB on
8987 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8988 bugfix on 0.3.3.5-rc.
8990 o Minor bugfixes (testing):
8991 - Revise the "conditionvar_timeout" test so that it succeeds even on
8992 heavily loaded systems where the test threads are not scheduled
8993 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
8995 o Code simplification and refactoring:
8996 - Divide the routerlist.c and dirserv.c modules into smaller parts.
8997 Closes ticket 27799.
9000 Changes in version 0.3.5.1-alpha - 2018-09-18
9001 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
9002 client authorization for modern (v3) onion services, improves
9003 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
9004 support for NSS in place of OpenSSL, and much more.
9006 o Major features (onion services, UI change):
9007 - For a newly created onion service, the default version is now 3.
9008 Tor still supports existing version 2 services, but the operator
9009 now needs to set "HiddenServiceVersion 2" in order to create a new
9010 version 2 service. For existing services, Tor now learns the
9011 version by reading the key file. Closes ticket 27215.
9013 o Major features (relay, UI change):
9014 - Relays no longer run as exits by default. If the "ExitRelay"
9015 option is auto (or unset), and no exit policy is specified with
9016 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
9017 Previously in this case, we allowed exit traffic and logged a
9018 warning message. Closes ticket 21530. Patch by Neel Chauhan.
9019 - Tor now validates that the ContactInfo config option is valid UTF-
9020 8 when parsing torrc. Closes ticket 27428.
9022 o Major features (bootstrap):
9023 - Don't report directory progress until after a connection to a
9024 relay or bridge has succeeded. Previously, we'd report 80%
9025 progress based on cached directory information when we couldn't
9026 even connect to the network. Closes ticket 27169.
9028 o Major features (new code layout):
9029 - Nearly all of Tor's source code has been moved around into more
9030 logical places. The "common" directory is now divided into a set
9031 of libraries in "lib", and files in the "or" directory have been
9032 split into "core" (logic absolutely needed for onion routing),
9033 "feature" (independent modules in Tor), and "app" (to configure
9034 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
9035 more information. Closes ticket 26481.
9037 This refactoring is not complete: although the libraries have been
9038 refactored to be acyclic, the main body of Tor is still too
9039 interconnected. We will attempt to improve this in the future.
9041 o Major features (onion services v3):
9042 - Implement onion service client authorization at the descriptor
9043 level: only authorized clients can decrypt a service's descriptor
9044 to find out how to contact it. A new torrc option was added to
9045 control this client side: ClientOnionAuthDir <path>. On the
9046 service side, if the "authorized_clients/" directory exists in the
9047 onion service directory path, client configurations are read from
9048 the files within. See the manpage for more details. Closes ticket
9049 27547. Patch done by Suphanat Chunhapanya (haxxpop).
9050 - Improve revision counter generation in next-gen onion services.
9051 Onion services can now scale by hosting multiple instances on
9052 different hosts without synchronization between them, which was
9053 previously impossible because descriptors would get rejected by
9054 HSDirs. Addresses ticket 25552.
9056 o Major features (portability, cryptography, experimental, TLS):
9057 - Tor now has the option to compile with the NSS library instead of
9058 OpenSSL. This feature is experimental, and we expect that bugs may
9059 remain. It is mainly intended for environments where Tor's
9060 performance is not CPU-bound, and where NSS is already known to be
9061 installed. To try it out, configure Tor with the --enable-nss
9062 flag. Closes tickets 26631, 26815, and 26816.
9064 If you are experimenting with this option and using an old cached
9065 consensus, Tor may fail to start. To solve this, delete your
9066 "cached-consensus" and "cached-microdesc-consensus" files,
9067 (if present), and restart Tor.
9069 o Major bugfixes (directory authority):
9070 - Actually check that the address we get from DirAuthority
9071 configuration line is valid IPv4. Explicitly disallow DirAuthority
9072 address to be a DNS hostname. Fixes bug 26488; bugfix
9075 o Major bugfixes (restart-in-process):
9076 - Fix a use-after-free error that could be caused by passing Tor an
9077 impossible set of options that would fail during options_act().
9078 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
9080 o Minor features (admin tools):
9081 - Add a new --key-expiration option to print the expiration date of
9082 the signing cert in an ed25519_signing_cert file. Resolves
9085 o Minor features (build):
9086 - If you pass the "--enable-pic" option to configure, Tor will try
9087 to tell the compiler to build position-independent code suitable
9088 to link into a dynamic library. (The default remains -fPIE, for
9089 code suitable for a relocatable executable.) Closes ticket 23846.
9091 o Minor features (code correctness, testing):
9092 - Tor's build process now includes a "check-includes" make target to
9093 verify that no module of Tor relies on any headers from a higher-
9094 level module. We hope to use this feature over time to help
9095 refactor our codebase. Closes ticket 26447.
9097 o Minor features (code layout):
9098 - We have a new "lowest-level" error-handling API for use by code
9099 invoked from within the logging module. With this interface, the
9100 logging code is no longer at risk of calling into itself if a
9101 failure occurs while it is trying to log something. Closes
9104 o Minor features (compilation):
9105 - Tor's configure script now supports a --with-malloc= option to
9106 select your malloc implementation. Supported options are
9107 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
9108 default). Addresses part of ticket 20424. Based on a patch from
9111 o Minor features (config):
9112 - The "auto" keyword in torrc is now case-insensitive. Closes
9115 o Minor features (continuous integration):
9116 - Don't do a distcheck with --disable-module-dirauth in Travis.
9117 Implements ticket 27252.
9118 - Install libcap-dev and libseccomp2-dev so these optional
9119 dependencies get tested on Travis CI. Closes ticket 26560.
9120 - Only run one online rust build in Travis, to reduce network
9121 errors. Skip offline rust builds on Travis for Linux gcc, because
9122 they're redundant. Implements ticket 27252.
9123 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
9124 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
9125 Linux with default settings, because all the non-default builds
9126 use gcc on Linux. Implements ticket 27252.
9128 o Minor features (controller):
9129 - Emit CIRC_BW events as soon as we detect that we processed an
9130 invalid or otherwise dropped cell on a circuit. This allows
9131 vanguards and other controllers to react more quickly to dropped
9132 cells. Closes ticket 27678.
9133 - For purposes of CIRC_BW-based dropped cell detection, track half-
9134 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
9135 bias check cells to arrive without counting it as dropped until
9136 either the END arrives, or the windows are empty. Closes
9138 - Implement a 'GETINFO md/all' controller command to enable getting
9139 all known microdescriptors. Closes ticket 8323.
9140 - The GETINFO command now support an "uptime" argument, to return
9141 Tor's uptime in seconds. Closes ticket 25132.
9143 o Minor features (denial-of-service avoidance):
9144 - Make our OOM handler aware of the DNS cache so that it doesn't
9145 fill up the memory. This check is important for our DoS mitigation
9146 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
9148 o Minor features (development):
9149 - Tor's makefile now supports running the "clippy" Rust style tool
9150 on our Rust code. Closes ticket 22156.
9152 o Minor features (directory authority):
9153 - There is no longer an artificial upper limit on the length of
9154 bandwidth lines. Closes ticket 26223.
9155 - When a bandwidth file is used to obtain the bandwidth measurements,
9156 include this bandwidth file headers in the votes. Closes
9158 - Improved support for networks with only a single authority or a
9159 single fallback directory. Patch from Gabriel Somlo. Closes
9162 o Minor features (embedding API):
9163 - The Tor controller API now supports a function to launch Tor with
9164 a preconstructed owning controller FD, so that embedding
9165 applications don't need to manage controller ports and
9166 authentication. Closes ticket 24204.
9167 - The Tor controller API now has a function that returns the name
9168 and version of the backend implementing the API. Closes
9171 o Minor features (geoip):
9172 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
9173 Country database. Closes ticket 27631.
9175 o Minor features (memory management):
9176 - Get Libevent to use the same memory allocator as Tor, by calling
9177 event_set_mem_functions() during initialization. Resolves
9180 o Minor features (memory usage):
9181 - When not using them, store legacy TAP public onion keys in DER-
9182 encoded format, rather than as expanded public keys. This should
9183 save several megabytes on typical clients. Closes ticket 27246.
9185 o Minor features (OpenSSL):
9186 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
9187 than our own. Resolves ticket 19979.
9189 o Minor features (Rust, code quality):
9190 - Improve rust code quality in the rust protover implementation by
9191 making it more idiomatic. Includes changing an internal API to
9192 take &str instead of &String. Closes ticket 26492.
9194 o Minor features (testing):
9195 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
9196 chutney. Implements ticket 27211.
9198 o Minor features (tor-resolve):
9199 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
9200 Side-effect of the refactoring for ticket 26526.
9202 o Minor features (UI):
9203 - Log each included configuration file or directory as we read it,
9204 to provide more visibility about where Tor is reading from. Patch
9205 from Unto Sten; closes ticket 27186.
9206 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
9207 Closes ticket 26703.
9209 o Minor bugfixes (bootstrap):
9210 - Try harder to get descriptors in non-exit test networks, by using
9211 the mid weight for the third hop when there are no exits. Fixes
9212 bug 27237; bugfix on 0.2.6.2-alpha.
9214 o Minor bugfixes (C correctness):
9215 - Avoid casting smartlist index to int implicitly, as it may trigger
9216 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
9217 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
9218 - Use time_t for all values in
9219 predicted_ports_prediction_time_remaining(). Rework the code that
9220 computes difference between durations/timestamps. Fixes bug 27165;
9221 bugfix on 0.3.1.1-alpha.
9223 o Minor bugfixes (client, memory usage):
9224 - When not running as a directory cache, there is no need to store
9225 the text of the current consensus networkstatus in RAM.
9226 Previously, however, clients would store it anyway, at a cost of
9227 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
9230 o Minor bugfixes (client, reachableaddresses):
9231 - Instead of adding a "reject *:*" line to ReachableAddresses when
9232 loading the configuration, add one to the policy after parsing it
9233 in parse_reachable_addresses(). This prevents extra "reject *.*"
9234 lines from accumulating on reloads. Fixes bug 20874; bugfix on
9235 0.1.1.5-alpha. Patch by Neel Chauhan.
9237 o Minor bugfixes (code quality):
9238 - Rename sandbox_getaddrinfo() and other functions to no longer
9239 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
9240 bugfix on 0.2.7.1-alpha.
9242 o Minor bugfixes (configuration, Onion Services):
9243 - In rend_service_parse_port_config(), disallow any input to remain
9244 after address-port pair was parsed. This will catch address and
9245 port being whitespace-separated by mistake of the user. Fixes bug
9246 27044; bugfix on 0.2.9.10.
9248 o Minor bugfixes (continuous integration):
9249 - Stop reinstalling identical packages in our Windows CI. Fixes bug
9250 27464; bugfix on 0.3.4.1-alpha.
9252 o Minor bugfixes (controller):
9253 - Consider all routerinfo errors other than "not a server" to be
9254 transient for the purpose of "GETINFO exit-policy/*" controller
9255 request. Print stacktrace in the unlikely case of failing to
9256 recompute routerinfo digest. Fixes bug 27034; bugfix
9259 o Minor bugfixes (directory connection shutdown):
9260 - Avoid a double-close when shutting down a stalled directory
9261 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
9263 o Minor bugfixes (HTTP tunnel):
9264 - Fix a bug warning when closing an HTTP tunnel connection due to an
9265 HTTP request we couldn't handle. Fixes bug 26470; bugfix
9268 o Minor bugfixes (ipv6):
9269 - In addrs_in_same_network_family(), we choose the subnet size based
9270 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
9271 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
9272 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
9274 o Minor bugfixes (logging):
9275 - As a precaution, do an early return from log_addr_has_changed() if
9276 Tor is running as client. Also, log a stack trace for debugging as
9277 this function should only be called when Tor runs as server. Fixes
9278 bug 26892; bugfix on 0.1.1.9-alpha.
9279 - Refrain from mentioning bug 21018 in the logs, as it is already
9280 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
9282 o Minor bugfixes (logging, documentation):
9283 - When SafeLogging is enabled, scrub IP address in
9284 channel_tls_process_netinfo_cell(). Also, add a note to manpage
9285 that scrubbing is not guaranteed on loglevels below Notice. Fixes
9286 bug 26882; bugfix on 0.2.4.10-alpha.
9288 o Minor bugfixes (netflow padding):
9289 - Ensure circuitmux queues are empty before scheduling or sending
9290 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
9292 o Minor bugfixes (onion service v2):
9293 - Log at level "info", not "warning", in the case that we do not
9294 have a consensus when a .onion request comes in. This can happen
9295 normally while bootstrapping. Fixes bug 27040; bugfix
9298 o Minor bugfixes (onion service v3):
9299 - When the onion service directory can't be created or has the wrong
9300 permissions, do not log a stack trace. Fixes bug 27335; bugfix
9303 o Minor bugfixes (OS compatibility):
9304 - Properly handle configuration changes that move a listener to/from
9305 wildcard IP address. If the first attempt to bind a socket fails,
9306 close the old listener and try binding the socket again. Fixes bug
9307 17873; bugfix on 0.0.8pre-1.
9309 o Minor bugfixes (performance)::
9310 - Rework node_is_a_configured_bridge() to no longer call
9311 node_get_all_orports(), which was performing too many memory
9312 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
9314 o Minor bugfixes (relay statistics):
9315 - Update relay descriptor on bandwidth changes only when the uptime
9316 is smaller than 24h, in order to reduce the efficiency of guard
9317 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
9319 o Minor bugfixes (relays):
9320 - Consider the fact that we'll be making direct connections to our
9321 entry and guard nodes when computing the fraction of nodes that
9322 have their descriptors. Also, if we are using bridges and there is
9323 at least one bridge with a full descriptor, treat the fraction of
9324 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
9325 Patch by Neel Chauhan.
9326 - Update the message logged on relays when DirCache is disabled.
9327 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
9328 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9330 o Minor bugfixes (rust, protover):
9331 - Compute protover votes correctly in the rust version of the
9332 protover code. Previously, the protover rewrite in 24031 allowed
9333 repeated votes from the same voter for the same protocol version
9334 to be counted multiple times in protover_compute_vote(). Fixes bug
9335 27649; bugfix on 0.3.3.5-rc.
9336 - Reject protover names that contain invalid characters. Fixes bug
9337 27687; bugfix on 0.3.3.1-alpha.
9339 o Minor bugfixes (testing):
9340 - Fix two unit tests to work when HOME environment variable is not
9341 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9342 - If a unit test running in a subprocess exits abnormally or with a
9343 nonzero status code, treat the test as having failed, even if the
9344 test reported success. Without this fix, memory leaks don't cause
9345 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9346 bugfix on 0.2.2.4-alpha.
9347 - When logging a version mismatch in our openssl_version tests,
9348 report the actual offending version strings. Fixes bug 26152;
9349 bugfix on 0.2.9.1-alpha.
9350 - Fix forking tests on Windows when there is a space somewhere in
9351 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
9353 o Code simplification and refactoring:
9354 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
9355 longer needed. Closes ticket 26502.
9356 - Include paths to header files within Tor are now qualified by
9357 directory within the top-level src directory.
9358 - Many structures have been removed from the centralized "or.h"
9359 header, and moved into their own headers. This will allow us to
9360 reduce the number of places in the code that rely on each
9361 structure's contents and layout. Closes ticket 26383.
9362 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
9363 - Remove GetAdaptersAddresses_fn_t. The code that used it was
9364 removed as part of the 26481 refactor. Closes ticket 27467.
9365 - Rework Tor SOCKS server code to use Trunnel and benefit from
9366 autogenerated functions for parsing and generating SOCKS wire
9367 format. New implementation is cleaner, more maintainable and
9368 should be less prone to heartbleed-style vulnerabilities.
9369 Implements a significant fraction of ticket 3569.
9370 - Split sampled_guards_update_from_consensus() and
9371 select_entry_guard_for_circuit() into subfunctions. In
9372 entry_guards_update_primary() unite three smartlist enumerations
9373 into one and move smartlist comparison code out of the function.
9374 Closes ticket 21349.
9375 - Tor now assumes that you have standards-conformant stdint.h and
9376 inttypes.h headers when compiling. Closes ticket 26626.
9377 - Unify our bloom filter logic. Previously we had two copies of this
9378 code: one for routerlist filtering, and one for address set
9379 calculations. Closes ticket 26510.
9380 - Use the simpler strcmpstart() helper in
9381 rend_parse_v2_service_descriptor instead of strncmp(). Closes
9383 - Utility functions that can perform a DNS lookup are now wholly
9384 separated from those that can't, in separate headers and C
9385 modules. Closes ticket 26526.
9388 - Copy paragraph and URL to Tor's code of conduct document from
9389 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
9390 - Remove old instructions from INSTALL document. Closes ticket 26588.
9391 - Warn users that they should not include MyFamily line(s) in their
9392 torrc when running Tor bridge. Closes ticket 26908.
9395 - Tor no longer supports building with the dmalloc library. For
9396 debugging memory issues, we suggest using gperftools or msan
9397 instead. Closes ticket 26426.
9398 - Tor no longer attempts to run on Windows environments without the
9399 GetAdaptersAddresses() function. This function has existed since
9400 Windows XP, which is itself already older than we support.
9401 - Remove Tor2web functionality for version 2 onion services. The
9402 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
9403 (This feature was never shipped in vanilla Tor and it was only
9404 possible to use this feature by building the support at compile
9405 time. Tor2webMode is not implemented for version 3 onion services.)
9406 Closes ticket 26367.
9409 Changes in version 0.2.9.17 - 2018-09-10
9410 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
9412 o Minor features (compatibility, backport from 0.3.4.8):
9413 - Tell OpenSSL to maintain backward compatibility with previous
9414 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9415 ciphers are disabled by default. Closes ticket 27344.
9417 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9418 - Enable macOS builds in our Travis CI configuration. Closes
9420 - Install libcap-dev and libseccomp2-dev so these optional
9421 dependencies get tested on Travis CI. Closes ticket 26560.
9422 - Run asciidoc during Travis CI. Implements ticket 27087.
9423 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9425 o Minor features (geoip):
9426 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9427 Country database. Closes ticket 27089.
9429 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9430 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9431 tell the compiler not to include the system malloc implementation.
9432 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9434 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9435 - Silence a spurious compiler warning on the GetAdaptersAddresses
9436 function pointer cast. This issue is already fixed by 26481 in
9437 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9438 bugfix on 0.2.3.11-alpha.
9439 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9440 supported, and always fails. Some compilers warn about the
9441 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9444 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9445 - Don't link or search for pthreads when building for Windows, even
9446 if we are using build environment (like mingw) that provides a
9447 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9449 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9450 - Skip a pair of unreliable key generation tests on Windows, until
9451 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9452 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9454 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9455 - Pass the module flags to distcheck configure, and log the flags
9456 before running configure. (Backported to 0.2.9 and later as a
9457 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9459 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9460 - When a Travis build fails, and showing a log fails, keep trying to
9461 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9462 - When we use echo in Travis, don't pass a --flag as the first
9463 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9465 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9466 - When voting for recommended versions, make sure that all of the
9467 versions are well-formed and parsable. Fixes bug 26485; bugfix
9470 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9471 - Fix a bug in out sandboxing rules for the openat() syscall.
9472 Previously, no openat() call would be permitted, which would break
9473 filesystem operations on recent glibc versions. Fixes bug 25440;
9474 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9476 o Minor bugfixes (onion services, backport from 0.3.4.8):
9477 - Silence a spurious compiler warning in
9478 rend_client_send_introduction(). Fixes bug 27463; bugfix
9481 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9482 - Log a protocol warning when single onion services or Tor2web clients
9483 fail to authenticate direct connections to relays.
9484 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9486 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9487 - Disable core dumps in test_bt.sh, to avoid failures in "make
9488 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9490 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9491 - Before running make test-network-all, delete old logs and test
9492 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9495 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9496 - Our "tortls/cert_matches_key" unit test no longer relies on
9497 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9498 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9499 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9501 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9502 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9503 27185; bugfix on 0.2.2.2-alpha.
9506 Changes in version 0.3.2.12 - 2018-09-10
9507 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
9509 o Minor features (compatibility, backport from 0.3.4.8):
9510 - Tell OpenSSL to maintain backward compatibility with previous
9511 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9512 ciphers are disabled by default. Closes ticket 27344.
9514 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9515 - Enable macOS builds in our Travis CI configuration. Closes
9517 - Install libcap-dev and libseccomp2-dev so these optional
9518 dependencies get tested on Travis CI. Closes ticket 26560.
9519 - Run asciidoc during Travis CI. Implements ticket 27087.
9520 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9522 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9523 - Use cargo cache in our Travis CI configuration. Closes
9526 o Minor features (controller, backport from 0.3.4.6-rc):
9527 - The control port now exposes the list of HTTPTunnelPorts and
9528 ExtOrPorts via GETINFO net/listeners/httptunnel and
9529 net/listeners/extor respectively. Closes ticket 26647.
9531 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9532 - Authorities no longer vote to make the subprotocol version
9533 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9534 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9536 o Minor features (geoip):
9537 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9538 Country database. Closes ticket 27089.
9540 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9541 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9542 tell the compiler not to include the system malloc implementation.
9543 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9544 - Don't try to use a pragma to temporarily disable the
9545 -Wunused-const-variable warning if the compiler doesn't support
9546 it. Fixes bug 26785; bugfix on 0.3.2.11.
9548 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9549 - Silence a spurious compiler warning on the GetAdaptersAddresses
9550 function pointer cast. This issue is already fixed by 26481 in
9551 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9552 bugfix on 0.2.3.11-alpha.
9553 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9554 supported, and always fails. Some compilers warn about the
9555 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9558 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9559 - Don't link or search for pthreads when building for Windows, even
9560 if we are using build environment (like mingw) that provides a
9561 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9563 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9564 - Skip a pair of unreliable key generation tests on Windows, until
9565 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9566 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9568 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9569 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9570 - Pass the module flags to distcheck configure, and log the flags
9571 before running configure. (Backported to 0.2.9 and later as a
9572 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9574 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9575 - When a Travis build fails, and showing a log fails, keep trying to
9576 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9577 - When we use echo in Travis, don't pass a --flag as the first
9578 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9580 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9581 - When voting for recommended versions, make sure that all of the
9582 versions are well-formed and parsable. Fixes bug 26485; bugfix
9585 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9586 - Fix a bug in out sandboxing rules for the openat() syscall.
9587 Previously, no openat() call would be permitted, which would break
9588 filesystem operations on recent glibc versions. Fixes bug 25440;
9589 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9591 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9592 - Improve the log message when connection initiators fail to
9593 authenticate direct connections to relays. Fixes bug 26927; bugfix
9596 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9597 - Fix bug that causes services to not ever rotate their descriptors
9598 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9601 o Minor bugfixes (onion services, backport from 0.3.4.8):
9602 - Silence a spurious compiler warning in
9603 rend_client_send_introduction(). Fixes bug 27463; bugfix
9606 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9607 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9609 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9610 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9611 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9612 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9614 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9615 - Log a protocol warning when single onion services or Tor2web clients
9616 fail to authenticate direct connections to relays.
9617 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9619 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9620 - Disable core dumps in test_bt.sh, to avoid failures in "make
9621 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9623 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9624 - When running make test-network-all, use the mixed+hs-v2 network.
9625 (A previous fix to chutney removed v3 onion services from the
9626 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9627 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9628 - Before running make test-network-all, delete old logs and test
9629 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9632 o Minor bugfixes (testing, openssl compatibility):
9633 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
9634 internals. Previously, it relied on unsupported OpenSSL behavior in
9635 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
9636 bugfix on 0.2.5.1-alpha.
9638 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9639 - Our "tortls/cert_matches_key" unit test no longer relies on
9640 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9641 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9642 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9644 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9645 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9646 27185; bugfix on 0.2.2.2-alpha.
9649 Changes in version 0.3.3.10 - 2018-09-10
9650 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
9652 o Minor features (bug workaround, backport from 0.3.4.7-rc):
9653 - Compile correctly on systems that provide the C11 stdatomic.h
9654 header, but where C11 atomic functions don't actually compile.
9655 Closes ticket 26779; workaround for Debian issue 903709.
9657 o Minor features (compatibility, backport from 0.3.4.8):
9658 - Tell OpenSSL to maintain backward compatibility with previous
9659 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9660 ciphers are disabled by default. Closes ticket 27344.
9662 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9663 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9664 - Enable macOS builds in our Travis CI configuration. Closes
9666 - Install libcap-dev and libseccomp2-dev so these optional
9667 dependencies get tested on Travis CI. Closes ticket 26560.
9668 - Run asciidoc during Travis CI. Implements ticket 27087.
9669 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9671 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9672 - Use cargo cache in our Travis CI configuration. Closes
9675 o Minor features (controller, backport from 0.3.4.6-rc):
9676 - The control port now exposes the list of HTTPTunnelPorts and
9677 ExtOrPorts via GETINFO net/listeners/httptunnel and
9678 net/listeners/extor respectively. Closes ticket 26647.
9680 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9681 - Authorities no longer vote to make the subprotocol version
9682 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9683 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9685 o Minor features (geoip):
9686 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9687 Country database. Closes ticket 27089.
9689 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9690 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9691 tell the compiler not to include the system malloc implementation.
9692 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9693 - Don't try to use a pragma to temporarily disable the
9694 -Wunused-const-variable warning if the compiler doesn't support
9695 it. Fixes bug 26785; bugfix on 0.3.2.11.
9697 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9698 - Silence a spurious compiler warning on the GetAdaptersAddresses
9699 function pointer cast. This issue is already fixed by 26481 in
9700 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9701 bugfix on 0.2.3.11-alpha.
9702 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9703 supported, and always fails. Some compilers warn about the
9704 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9707 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9708 - Don't link or search for pthreads when building for Windows, even
9709 if we are using build environment (like mingw) that provides a
9710 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9712 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9713 - Skip a pair of unreliable key generation tests on Windows, until
9714 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9715 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9717 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9718 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9719 - Pass the module flags to distcheck configure, and log the flags
9720 before running configure. (Backported to 0.2.9 and later as a
9721 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9723 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9724 - When a Travis build fails, and showing a log fails, keep trying to
9725 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9726 - When we use echo in Travis, don't pass a --flag as the first
9727 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9729 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9730 - When voting for recommended versions, make sure that all of the
9731 versions are well-formed and parsable. Fixes bug 26485; bugfix
9734 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
9735 - Always call tor_free_all() when leaving tor_run_main(). When we
9736 did not, restarting tor in-process would cause an assertion
9737 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9739 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9740 - Fix a bug in our sandboxing rules for the openat() syscall.
9741 Previously, no openat() call would be permitted, which would break
9742 filesystem operations on recent glibc versions. Fixes bug 25440;
9743 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9745 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9746 - Improve the log message when connection initiators fail to
9747 authenticate direct connections to relays. Fixes bug 26927; bugfix
9750 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9751 - Fix bug that causes services to not ever rotate their descriptors
9752 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9755 o Minor bugfixes (onion services, backport from 0.3.4.8):
9756 - Silence a spurious compiler warning in
9757 rend_client_send_introduction(). Fixes bug 27463; bugfix
9760 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
9761 - Work around two different bugs in the OS X 10.10 and later SDKs
9762 that would prevent us from successfully targeting earlier versions
9763 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
9765 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
9766 - Fix compilation of the unit tests on GNU/Hurd, which does not
9767 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9770 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9771 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9773 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9774 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9775 - Protover parsing was accepting the presence of whitespace in
9776 version strings, which the C implementation would choke on, e.g.
9777 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9778 - Protover parsing was ignoring a 2nd hyphen and everything after
9779 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9781 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9782 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9783 - cd to ${abs_top_builddir}/src/rust before running cargo in
9784 src/test/test_rust.sh. This makes the working directory consistent
9785 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9787 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9788 - Log a protocol warning when single onion services or Tor2web clients
9789 fail to authenticate direct connections to relays.
9790 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9792 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9793 - Disable core dumps in test_bt.sh, to avoid failures in "make
9794 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9796 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9797 - When running make test-network-all, use the mixed+hs-v2 network.
9798 (A previous fix to chutney removed v3 onion services from the
9799 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9800 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9801 - Before running make test-network-all, delete old logs and test
9802 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9805 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9806 - Our "tortls/cert_matches_key" unit test no longer relies on
9807 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9808 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9809 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9811 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
9812 - Stop sending ed25519 link specifiers in v3 onion service introduce
9813 cells and descriptors, when the rendezvous or introduction point
9814 doesn't support ed25519 link authentication. Fixes bug 26627;
9815 bugfix on 0.3.2.4-alpha.
9817 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9818 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9819 27185; bugfix on 0.2.2.2-alpha.
9822 Changes in version 0.3.4.8 - 2018-09-10
9823 Tor 0.3.4.8 is the first stable release in its series; it includes
9824 compilation and portability fixes.
9826 The Tor 0.3.4 series includes improvements for running Tor in
9827 low-power and embedded environments, which should help performance in
9828 general. We've begun work on better modularity, and included preliminary
9829 changes on the directory authority side to accommodate a new bandwidth
9830 measurement system. We've also integrated more continuous-integration
9831 systems into our development process, and made corresponding changes to
9832 Tor's testing infrastructure. Finally, we've continued to refine
9833 our anti-denial-of-service code.
9835 Below are the changes since 0.3.4.7-rc. For a complete list of changes
9836 since 0.3.3.9, see the ReleaseNotes file.
9838 o Minor features (compatibility):
9839 - Tell OpenSSL to maintain backward compatibility with previous
9840 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9841 ciphers are disabled by default. Closes ticket 27344.
9843 o Minor features (continuous integration):
9844 - Log the compiler path and version during Appveyor builds.
9845 Implements ticket 27449.
9846 - Show config.log and test-suite.log after failed Appveyor builds.
9847 Also upload the zipped full logs as a build artifact. Implements
9850 o Minor bugfixes (compilation):
9851 - Silence a spurious compiler warning on the GetAdaptersAddresses
9852 function pointer cast. This issue is already fixed by 26481 in
9853 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9854 bugfix on 0.2.3.11-alpha.
9855 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9856 supported, and always fails. Some compilers warn about the
9857 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9860 o Minor bugfixes (continuous integration):
9861 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
9862 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
9863 Executables compiled for 64-bit Windows with this version of gcc
9864 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
9865 27460; bugfix on 0.3.4.1-alpha.
9866 - When a Travis build fails, and showing a log fails, keep trying to
9867 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9868 - When we use echo in Travis, don't pass a --flag as the first
9869 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9871 o Minor bugfixes (onion services):
9872 - Silence a spurious compiler warning in
9873 rend_client_send_introduction(). Fixes bug 27463; bugfix
9876 o Minor bugfixes (testing, chutney):
9877 - When running make test-network-all, use the mixed+hs-v2 network.
9878 (A previous fix to chutney removed v3 onion services from the
9879 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9880 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9881 - Before running make test-network-all, delete old logs and test
9882 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9885 Changes in version 0.3.4.7-rc - 2018-08-24
9886 Tor 0.3.4.7-rc fixes several small compilation, portability, and
9887 correctness issues in previous versions of Tor. This version is a
9888 release candidate: if no serious bugs are found, we expect that the
9889 stable 0.3.4 release will be (almost) the same as this release.
9891 o Minor features (bug workaround):
9892 - Compile correctly on systems that provide the C11 stdatomic.h
9893 header, but where C11 atomic functions don't actually compile.
9894 Closes ticket 26779; workaround for Debian issue 903709.
9896 o Minor features (continuous integration):
9897 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9898 - Enable macOS builds in our Travis CI configuration. Closes
9900 - Install libcap-dev and libseccomp2-dev so these optional
9901 dependencies get tested on Travis CI. Closes ticket 26560.
9902 - Only post Appveyor IRC notifications when the build fails.
9903 Implements ticket 27275.
9904 - Run asciidoc during Travis CI. Implements ticket 27087.
9905 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9907 o Minor features (continuous integration, rust):
9908 - Use cargo cache in our Travis CI configuration. Closes
9911 o Minor features (directory authorities):
9912 - Authorities no longer vote to make the subprotocol version
9913 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9914 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9916 o Minor features (geoip):
9917 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9918 Country database. Closes ticket 27089.
9920 o Minor bugfixes (compilation, windows):
9921 - Don't link or search for pthreads when building for Windows, even
9922 if we are using build environment (like mingw) that provides a
9923 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9925 o Minor bugfixes (continuous integration):
9926 - Improve Appveyor CI IRC logging. Generate correct branches and
9927 URLs for pull requests and tags. Use unambiguous short commits.
9928 Fixes bug 26979; bugfix on master.
9929 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9930 - Pass the module flags to distcheck configure, and log the flags
9931 before running configure. (Backported to 0.2.9 and later as a
9932 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9934 o Minor bugfixes (in-process restart):
9935 - Always call tor_free_all() when leaving tor_run_main(). When we
9936 did not, restarting tor in-process would cause an assertion
9937 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9939 o Minor bugfixes (linux seccomp2 sandbox):
9940 - Fix a bug in out sandboxing rules for the openat() syscall.
9941 Previously, no openat() call would be permitted, which would break
9942 filesystem operations on recent glibc versions. Fixes bug 25440;
9943 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9945 o Minor bugfixes (onion services):
9946 - Fix bug that causes services to not ever rotate their descriptors
9947 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9950 o Minor bugfixes (portability):
9951 - Fix compilation of the unit tests on GNU/Hurd, which does not
9952 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9955 o Minor bugfixes (rust):
9956 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9958 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9959 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9960 - Protover parsing was accepting the presence of whitespace in
9961 version strings, which the C implementation would choke on, e.g.
9962 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9963 - Protover parsing was ignoring a 2nd hyphen and everything after
9964 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9966 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9967 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9968 - cd to ${abs_top_builddir}/src/rust before running cargo in
9969 src/test/test_rust.sh. This makes the working directory consistent
9970 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9972 o Minor bugfixes (testing, bootstrap):
9973 - When calculating bootstrap progress, check exit policies and the
9974 exit flag. Previously, Tor would only check the exit flag, which
9975 caused race conditions in small and fast networks like chutney.
9976 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
9978 o Minor bugfixes (testing, openssl compatibility):
9979 - Our "tortls/cert_matches_key" unit test no longer relies on
9980 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9981 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9982 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9984 o Minor bugfixes (Windows, compilation):
9985 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9986 27185; bugfix on 0.2.2.2-alpha.
9989 Changes in version 0.3.4.6-rc - 2018-08-06
9990 Tor 0.3.4.6-rc fixes several small compilation, portability, and
9991 correctness issues in previous versions of Tor. This version is a
9992 release candidate: if no serious bugs are found, we expect that the
9993 stable 0.3.4 release will be (almost) the same as this release.
9995 o Major bugfixes (event scheduler):
9996 - When we enable a periodic event, schedule it in the event loop
9997 rather than running it immediately. Previously, we would re-run
9998 periodic events immediately in the middle of (for example)
9999 changing our options, with unpredictable effects. Fixes bug 27003;
10000 bugfix on 0.3.4.1-alpha.
10002 o Minor features (compilation):
10003 - When building Tor, prefer to use Python 3 over Python 2, and more
10004 recent (contemplated) versions over older ones. Closes
10006 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
10007 tell the compiler not to include the system malloc implementation.
10008 Fixes bug 20424; bugfix on 0.2.0.20-rc.
10009 - Don't try to use a pragma to temporarily disable the
10010 -Wunused-const-variable warning if the compiler doesn't support
10011 it. Fixes bug 26785; bugfix on 0.3.2.11.
10013 o Minor bugfixes (continuous integration):
10014 - Skip a pair of unreliable key generation tests on Windows, until
10015 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
10016 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
10018 o Minor features (controller):
10019 - The control port now exposes the list of HTTPTunnelPorts and
10020 ExtOrPorts via GETINFO net/listeners/httptunnel and
10021 net/listeners/extor respectively. Closes ticket 26647.
10023 o Minor bugfixes (directory authority):
10024 - When voting for recommended versions, make sure that all of the
10025 versions are well-formed and parsable. Fixes bug 26485; bugfix
10028 o Minor features (geoip):
10029 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10030 Country database. Closes ticket 26674.
10032 o Minor features (Rust, portability):
10033 - Rust cross-compilation is now supported. Closes ticket 25895.
10035 o Minor bugfixes (compilation):
10036 - Update build system so that tor builds again with --disable-unittests
10037 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
10038 - Fix a compilation warning on some versions of GCC when building
10039 code that calls routerinfo_get_my_routerinfo() twice, assuming
10040 that the second call will succeed if the first one did. Fixes bug
10041 26269; bugfix on 0.2.8.2-alpha.
10043 o Minor bugfixes (controller):
10044 - Report the port correctly when a port is configured to bind to
10045 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10046 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
10047 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
10048 on 0.3.3.1-alpha. Patch by "akwizgran".
10050 o Minor bugfixes (correctness, flow control):
10051 - Upon receiving a stream-level SENDME cell, verify that our window
10052 has not grown too large. Fixes bug 26214; bugfix on svn
10055 o Minor bugfixes (memory, correctness):
10056 - Fix a number of small memory leaks identified by coverity. Fixes
10057 bug 26467; bugfix on numerous Tor versions.
10059 o Minor bugfixes (logging):
10060 - Improve the log message when connection initiators fail to
10061 authenticate direct connections to relays. Fixes bug 26927; bugfix
10064 o Minor bugfixes (portability):
10065 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
10066 26994; bugfix on 0.3.4.1-alpha.
10067 - Work around two different bugs in the OS X 10.10 and later SDKs
10068 that would prevent us from successfully targeting earlier versions
10069 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
10071 o Minor bugfixes (single onion services, Tor2web):
10072 - Log a protocol warning when single onion services or Tor2web
10073 clients fail to authenticate direct connections to relays. Fixes
10074 bug 26924; bugfix on 0.2.9.1-alpha.
10076 o Minor bugfixes (testing):
10077 - Disable core dumps in test_bt.sh, to avoid failures in "make
10078 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
10080 o Minor bugfixes (testing, compatibility):
10081 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
10082 only to pass strings (rather than "bytes" objects) to the Python
10083 subprocess module. Python 3 on Windows seems to require this.
10084 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
10085 0.3.1.1-alpha (for hs_ntor_ref.py).
10087 o Minor bugfixes (v3 onion services):
10088 - Stop sending ed25519 link specifiers in v3 onion service introduce
10089 cells and descriptors, when the rendezvous or introduction point
10090 doesn't support ed25519 link authentication. Fixes bug 26627;
10091 bugfix on 0.3.2.4-alpha.
10094 Changes in version 0.3.4.5-rc - 2018-07-13
10095 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
10096 bridge relays should upgrade.
10098 o Directory authority changes:
10099 - The "Bifroest" bridge authority has been retired; the new bridge
10100 authority is "Serge", and it is operated by George from the
10101 TorBSD project. Closes ticket 26771.
10104 Changes in version 0.3.3.9 - 2018-07-13
10105 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
10106 bridge relays should upgrade.
10108 o Directory authority changes:
10109 - The "Bifroest" bridge authority has been retired; the new bridge
10110 authority is "Serge", and it is operated by George from the
10111 TorBSD project. Closes ticket 26771.
10114 Changes in version 0.3.2.11 - 2018-07-13
10115 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
10116 bridge relays should upgrade. We also take this opportunity to backport
10119 o Directory authority changes:
10120 - The "Bifroest" bridge authority has been retired; the new bridge
10121 authority is "Serge", and it is operated by George from the
10122 TorBSD project. Closes ticket 26771.
10124 o Directory authority changes (backport from 0.3.3.7):
10125 - Add an IPv6 address for the "dannenberg" directory authority.
10126 Closes ticket 26343.
10128 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10129 - When directory authorities read a zero-byte bandwidth file, they
10130 would previously log a warning with the contents of an
10131 uninitialised buffer. They now log a warning about the empty file
10132 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10134 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10135 - Correctly detect when onion services get disabled after HUP. Fixes
10136 bug 25761; bugfix on 0.3.2.1.
10138 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10139 - Explicitly permit the poll() system call when the Linux
10140 seccomp2-based sandbox is enabled: apparently, some versions of
10141 libc use poll() when calling getpwnam(). Closes ticket 25313.
10143 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
10144 - Update the Travis CI configuration to use the stable Rust channel,
10145 now that we have decided to require that. Closes ticket 25714.
10147 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10148 - Our .travis.yml configuration now includes support for testing the
10149 results of "make distcheck". (It's not uncommon for "make check"
10150 to pass but "make distcheck" to fail.) Closes ticket 25814.
10151 - Our Travis CI configuration now integrates with the Coveralls
10152 coverage analysis tool. Closes ticket 25818.
10154 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10155 - Add several checks to detect whether Tor relays are uploading
10156 their descriptors without specifying why they regenerated them.
10157 Diagnostic for ticket 25686.
10159 o Minor features (compilation, backport from 0.3.4.4-rc):
10160 - When building Tor, prefer to use Python 3 over Python 2, and more
10161 recent (contemplated) versions over older ones. Closes
10164 o Minor features (geoip):
10165 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10166 Country database. Closes ticket 26674.
10168 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10169 - Upon receiving a malformed connected cell, stop processing the
10170 cell immediately. Previously we would mark the connection for
10171 close, but continue processing the cell as if the connection were
10172 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10174 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10175 - Allow the nanosleep() system call, which glibc uses to implement
10176 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10178 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10179 - When running the hs_ntor_ref.py test, make sure only to pass
10180 strings (rather than "bytes" objects) to the Python subprocess
10181 module. Python 3 on Windows seems to require this. Fixes bug
10182 26535; bugfix on 0.3.1.1-alpha.
10183 - When running the ntor_ref.py test, make sure only to pass strings
10184 (rather than "bytes" objects) to the Python subprocess module.
10185 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10188 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10189 - Work around a change in OpenSSL 1.1.1 where return values that
10190 would previously indicate "no password" now indicate an empty
10191 password. Without this workaround, Tor instances running with
10192 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10193 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10195 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
10196 - Document that the PerConnBW{Rate,Burst} options will fall back to
10197 their corresponding consensus parameters only if those parameters
10198 are set. Previously we had claimed that these values would always
10199 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10201 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10202 - Fix a compilation warning on some versions of GCC when building
10203 code that calls routerinfo_get_my_routerinfo() twice, assuming
10204 that the second call will succeed if the first one did. Fixes bug
10205 26269; bugfix on 0.2.8.2-alpha.
10207 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10208 - Don't consider Tor running as a client if the ControlPort is open,
10209 but no actual client ports are open. Fixes bug 26062; bugfix
10212 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10213 - Prevent a possible out-of-bounds smartlist read in
10214 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10216 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10217 - Fix a very unlikely (impossible, we believe) null pointer
10218 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10219 Coverity; this is CID 1430932.
10221 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10222 - Fix a memory leak when a v3 onion service is configured and gets a
10223 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10224 - When parsing the descriptor signature, look for the token plus an
10225 extra white-space at the end. This is more correct but also will
10226 allow us to support new fields that might start with "signature".
10227 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10229 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10230 - Relays now correctly block attempts to re-extend to the previous
10231 relay by Ed25519 identity. Previously they would warn in this
10232 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10235 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10236 - Avoid a crash when running with DirPort set but ORPort turned off.
10237 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10239 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10240 - Silence unused-const-variable warnings in zstd.h with some GCC
10241 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10243 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
10244 - Avoid intermittent test failures due to a test that had relied on
10245 onion service introduction point creation finishing within 5
10246 seconds of real clock time. Fixes bug 25450; bugfix
10249 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
10250 - Fix a C99 compliance issue in our configuration script that caused
10251 compilation issues when compiling Tor with certain versions of
10252 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10254 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10255 - Fix a number of small memory leaks identified by coverity. Fixes
10256 bug 26467; bugfix on numerous Tor versions.
10258 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10259 - Move the list of default directory authorities to its own file.
10260 Closes ticket 24854. Patch by "beastr0".
10263 Changes in version 0.2.9.16 - 2018-07-13
10264 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
10265 bridge relays should upgrade. We also take this opportunity to backport
10268 o Directory authority changes:
10269 - The "Bifroest" bridge authority has been retired; the new bridge
10270 authority is "Serge", and it is operated by George from the
10271 TorBSD project. Closes ticket 26771.
10273 o Directory authority changes (backport from 0.3.3.7):
10274 - Add an IPv6 address for the "dannenberg" directory authority.
10275 Closes ticket 26343.
10277 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10278 - When directory authorities read a zero-byte bandwidth file, they
10279 would previously log a warning with the contents of an
10280 uninitialised buffer. They now log a warning about the empty file
10281 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10283 o Minor features (sandbox, backport from 0.3.3.4-alpha):
10284 - Explicitly permit the poll() system call when the Linux
10285 seccomp2-based sandbox is enabled: apparently, some versions of
10286 libc use poll() when calling getpwnam(). Closes ticket 25313.
10288 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10289 - Our .travis.yml configuration now includes support for testing the
10290 results of "make distcheck". (It's not uncommon for "make check"
10291 to pass but "make distcheck" to fail.) Closes ticket 25814.
10292 - Our Travis CI configuration now integrates with the Coveralls
10293 coverage analysis tool. Closes ticket 25818.
10295 o Minor features (compilation, backport from 0.3.4.4-rc):
10296 - When building Tor, prefer to use Python 3 over Python 2, and more
10297 recent (contemplated) versions over older ones. Closes
10300 o Minor features (geoip):
10301 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10302 Country database. Closes ticket 26674.
10304 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10305 - Upon receiving a malformed connected cell, stop processing the
10306 cell immediately. Previously we would mark the connection for
10307 close, but continue processing the cell as if the connection were
10308 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10310 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10311 - Allow the nanosleep() system call, which glibc uses to implement
10312 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10314 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10315 - When running the ntor_ref.py test, make sure only to pass strings
10316 (rather than "bytes" objects) to the Python subprocess module.
10317 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10320 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10321 - Work around a change in OpenSSL 1.1.1 where return values that
10322 would previously indicate "no password" now indicate an empty
10323 password. Without this workaround, Tor instances running with
10324 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10325 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10327 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10328 - Fix a compilation warning on some versions of GCC when building
10329 code that calls routerinfo_get_my_routerinfo() twice, assuming
10330 that the second call will succeed if the first one did. Fixes bug
10331 26269; bugfix on 0.2.8.2-alpha.
10333 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10334 - Don't consider Tor running as a client if the ControlPort is open,
10335 but no actual client ports are open. Fixes bug 26062; bugfix
10338 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10339 - Prevent a possible out-of-bounds smartlist read in
10340 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10342 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10343 - Fix a very unlikely (impossible, we believe) null pointer
10344 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10345 Coverity; this is CID 1430932.
10347 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10348 - Fix a number of small memory leaks identified by coverity. Fixes
10349 bug 26467; bugfix on numerous Tor versions.
10351 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10352 - Move the list of default directory authorities to its own file.
10353 Closes ticket 24854. Patch by "beastr0".
10356 Changes in version 0.3.4.4-rc - 2018-07-09
10357 Tor 0.3.4.4-rc fixes several small compilation, portability, and
10358 correctness issues in previous versions of Tor. This version is a
10359 release candidate: if no serious bugs are found, we expect that the
10360 stable 0.3.4 release will be (almost) the same as this release.
10362 o Minor features (compilation):
10363 - When building Tor, prefer to use Python 3 over Python 2, and more
10364 recent (contemplated) versions over older ones. Closes
10367 o Minor features (geoip):
10368 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10369 Country database. Closes ticket 26674.
10371 o Minor features (Rust, portability):
10372 - Rust cross-compilation is now supported. Closes ticket 25895.
10374 o Minor bugfixes (compilation):
10375 - Fix a compilation warning on some versions of GCC when building
10376 code that calls routerinfo_get_my_routerinfo() twice, assuming
10377 that the second call will succeed if the first one did. Fixes bug
10378 26269; bugfix on 0.2.8.2-alpha.
10380 o Minor bugfixes (control port):
10381 - Report the port correctly when a port is configured to bind to
10382 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10383 - Handle the HSADDRESS= argument to the HSPOST command properly.
10384 (Previously, this argument was misparsed and thus ignored.) Fixes
10385 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10387 o Minor bugfixes (correctness, flow control):
10388 - Upon receiving a stream-level SENDME cell, verify that our window
10389 has not grown too large. Fixes bug 26214; bugfix on svn
10392 o Minor bugfixes (memory, correctness):
10393 - Fix a number of small memory leaks identified by coverity. Fixes
10394 bug 26467; bugfix on numerous Tor versions.
10396 o Minor bugfixes (testing, compatibility):
10397 - When running the hs_ntor_ref.py test, make sure only to pass
10398 strings (rather than "bytes" objects) to the Python subprocess
10399 module. Python 3 on Windows seems to require this. Fixes bug
10400 26535; bugfix on 0.3.1.1-alpha.
10401 - When running the ntor_ref.py test, make sure only to pass strings
10402 (rather than "bytes" objects) to the Python subprocess module.
10403 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10407 Changes in version 0.3.3.8 - 2018-07-09
10408 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
10409 fixes for a memory leak affecting directory authorities.
10411 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
10412 - Stop leaking memory on directory authorities when planning to
10413 vote. This bug was crashing authorities by exhausting their
10414 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10416 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
10417 - Make sure that failing tests in Rust will actually cause the build
10418 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10421 o Minor features (compilation, backport from 0.3.4.4-rc):
10422 - When building Tor, prefer to use Python 3 over Python 2, and more
10423 recent (contemplated) versions over older ones. Closes
10426 o Minor features (geoip):
10427 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10428 Country database. Closes ticket 26674.
10430 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10431 - Add several checks to detect whether Tor relays are uploading
10432 their descriptors without specifying why they regenerated them.
10433 Diagnostic for ticket 25686.
10435 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
10436 - Don't count path selection failures as circuit build failures.
10437 This change should eliminate cases where Tor blames its guard or
10438 the network for situations like insufficient microdescriptors
10439 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10442 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10443 - Fix a compilation warning on some versions of GCC when building
10444 code that calls routerinfo_get_my_routerinfo() twice, assuming
10445 that the second call will succeed if the first one did. Fixes bug
10446 26269; bugfix on 0.2.8.2-alpha.
10448 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
10449 - Handle the HSADDRESS= argument to the HSPOST command properly.
10450 (Previously, this argument was misparsed and thus ignored.) Fixes
10451 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10453 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10454 - Fix a number of small memory leaks identified by coverity. Fixes
10455 bug 26467; bugfix on numerous Tor versions.
10457 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10458 - Relays now correctly block attempts to re-extend to the previous
10459 relay by Ed25519 identity. Previously they would warn in this
10460 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10463 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
10464 - When shutting down, Tor now clears all the flags in the control.c
10465 module. This should prevent a bug where authentication cookies are
10466 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10468 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10469 - When running the hs_ntor_ref.py test, make sure only to pass
10470 strings (rather than "bytes" objects) to the Python subprocess
10471 module. Python 3 on Windows seems to require this. Fixes bug
10472 26535; bugfix on 0.3.1.1-alpha.
10473 - When running the ntor_ref.py test, make sure only to pass strings
10474 (rather than "bytes" objects) to the Python subprocess module.
10475 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10479 Changes in version 0.3.4.3-alpha - 2018-06-26
10480 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
10481 one that was causing stability issues on directory authorities.
10483 o Major bugfixes (directory authority):
10484 - Stop leaking memory on directory authorities when planning to
10485 vote. This bug was crashing authorities by exhausting their
10486 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10488 o Major bugfixes (rust, testing):
10489 - Make sure that failing tests in Rust will actually cause the build
10490 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10493 o Minor feature (directory authorities):
10494 - Stop warning about incomplete bw lines before the first complete
10495 bw line has been found, so that additional header lines can be
10496 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
10498 o Minor features (relay, diagnostic):
10499 - Add several checks to detect whether Tor relays are uploading
10500 their descriptors without specifying why they regenerated them.
10501 Diagnostic for ticket 25686.
10503 o Minor features (unit tests):
10504 - Test complete bandwidth measurements files, and test that
10505 incomplete bandwidth lines only give warnings when the end of the
10506 header has not been detected. Fixes bug 25947; bugfix
10509 o Minor bugfixes (compilation):
10510 - Refrain from compiling unit testing related object files when
10511 --disable-unittests is set to configure script. Fixes bug 24891;
10512 bugfix on 0.2.5.1-alpha.
10513 - When linking the libtor_testing.a library, only include the
10514 dirauth object files once. Previously, they were getting added
10515 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
10516 - The --enable-fatal-warnings flag now affects Rust code as well.
10517 Closes ticket 26245.
10519 o Minor bugfixes (onion services):
10520 - Recompute some consensus information after detecting a clock jump,
10521 or after transitioning from a non-live consensus to a live
10522 consensus. We do this to avoid having an outdated state, and
10523 miscalculating the index for next-generation onion services. Fixes
10524 bug 24977; bugfix on 0.3.2.1-alpha.
10526 o Minor bugfixes (relay):
10527 - Relays now correctly block attempts to re-extend to the previous
10528 relay by Ed25519 identity. Previously they would warn in this
10529 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10532 o Minor bugfixes (testing):
10533 - Fix compilation of the doctests in the Rust crypto crate. Fixes
10534 bug 26415; bugfix on 0.3.4.1-alpha.
10535 - Instead of trying to read the geoip configuration files from
10536 within the unit tests, instead create our own ersatz files with
10537 just enough geoip data in the format we expect. Trying to read
10538 from the source directory created problems on Windows with mingw,
10539 where the build system's paths are not the same as the platform's
10540 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
10541 - Refrain from trying to get an item from an empty smartlist in
10542 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
10543 to catch improper smartlist usage. Furthermore, enable
10544 DEBUG_SMARTLIST globally when build is configured with fragile
10545 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
10548 Changes in version 0.3.3.7 - 2018-06-12
10549 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
10550 fixes for bugs affecting compatibility and stability.
10552 o Directory authority changes:
10553 - Add an IPv6 address for the "dannenberg" directory authority.
10554 Closes ticket 26343.
10556 o Minor features (geoip):
10557 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10558 Country database. Closes ticket 26351.
10560 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10561 - Work around a change in OpenSSL 1.1.1 where return values that
10562 would previously indicate "no password" now indicate an empty
10563 password. Without this workaround, Tor instances running with
10564 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10565 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10567 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10568 - Silence unused-const-variable warnings in zstd.h with some GCC
10569 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10571 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
10572 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10573 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10574 miscounting the total number of circuits for these field values.)
10575 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10577 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10578 - Prevent a possible out-of-bounds smartlist read in
10579 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10581 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
10582 - Only select relays when they have the descriptors we prefer to use
10583 for them. This change fixes a bug where we could select a relay
10584 because it had _some_ descriptor, but reject it later with a
10585 nonfatal assertion error because it didn't have the exact one we
10586 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10589 Changes in version 0.3.4.2-alpha - 2018-06-12
10590 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
10591 release, and forward-ports an authority-only security fix from 0.3.3.6.
10593 o Directory authority changes:
10594 - Add an IPv6 address for the "dannenberg" directory authority.
10595 Closes ticket 26343.
10597 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
10598 - Fix a bug that could have allowed an attacker to force a directory
10599 authority to use up all its RAM by passing it a maliciously
10600 crafted protocol versions string. Fixes bug 25517; bugfix on
10601 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10603 o Minor features (continuous integration):
10604 - Add the necessary configuration files for continuous integration
10605 testing on Windows, via the Appveyor platform. Closes ticket
10606 25549. Patches from Marcin Cieślak and Isis Lovecruft.
10608 o Minor features (geoip):
10609 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10610 Country database. Closes ticket 26351.
10612 o Minor bugfixes (compatibility, openssl):
10613 - Work around a change in OpenSSL 1.1.1 where return values that
10614 would previously indicate "no password" now indicate an empty
10615 password. Without this workaround, Tor instances running with
10616 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10617 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10619 o Minor bugfixes (compilation):
10620 - Silence unused-const-variable warnings in zstd.h with some GCC
10621 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10622 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
10623 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
10624 - Avoid a compiler warning when casting the return value of
10625 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
10626 26283; bugfix on 0.2.4.10-alpha.
10628 o Minor bugfixes (control port):
10629 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
10630 CIRC_BW events. Previously, such cells were counted entirely in
10631 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
10634 o Minor bugfixes (controller):
10635 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10636 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10637 miscounting the total number of circuits for these field values.)
10638 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10640 o Minor bugfixes (hardening):
10641 - Prevent a possible out-of-bounds smartlist read in
10642 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10644 o Minor bugfixes (onion services):
10645 - Fix a bug that blocked the creation of ephemeral v3 onion
10646 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
10648 o Minor bugfixes (test coverage tools):
10649 - Update our "cov-diff" script to handle output from the latest
10650 version of gcov, and to remove extraneous timestamp information
10651 from its output. Fixes bugs 26101 and 26102; bugfix
10655 Changes in version 0.3.3.6 - 2018-05-22
10656 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
10657 backports several important fixes from the 0.3.4.1-alpha.
10659 The Tor 0.3.3 series includes controller support and other
10660 improvements for v3 onion services, official support for embedding Tor
10661 within other applications, and our first non-trivial module written in
10662 the Rust programming language. (Rust is still not enabled by default
10663 when building Tor.) And as usual, there are numerous other smaller
10664 bugfixes, features, and improvements.
10666 Below are the changes since 0.3.3.5-rc. For a list of all changes
10667 since 0.3.2.10, see the ReleaseNotes file.
10669 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
10670 - When directory authorities read a zero-byte bandwidth file, they
10671 would previously log a warning with the contents of an
10672 uninitialised buffer. They now log a warning about the empty file
10673 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10675 o Major bugfixes (security, directory authority, denial-of-service):
10676 - Fix a bug that could have allowed an attacker to force a directory
10677 authority to use up all its RAM by passing it a maliciously
10678 crafted protocol versions string. Fixes bug 25517; bugfix on
10679 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10681 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
10682 - Avoid a rare assertion failure in the circuit build timeout code
10683 if we fail to allow any circuits to actually complete. Fixes bug
10684 25733; bugfix on 0.2.2.2-alpha.
10686 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10687 - Avoid a crash when testing router reachability on a router that
10688 could have an ed25519 ID, but which does not. Fixes bug 25415;
10689 bugfix on 0.3.3.2-alpha.
10691 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10692 - Correctly detect when onion services get disabled after HUP. Fixes
10693 bug 25761; bugfix on 0.3.2.1.
10695 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
10696 - Impose a limit on circuit cell queue size. The limit can be
10697 controlled by a consensus parameter. Fixes bug 25226; bugfix
10700 o Minor features (compatibility, backport from 0.3.4.1-alpha):
10701 - Avoid some compilation warnings with recent versions of LibreSSL.
10702 Closes ticket 26006.
10704 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10705 - Our .travis.yml configuration now includes support for testing the
10706 results of "make distcheck". (It's not uncommon for "make check"
10707 to pass but "make distcheck" to fail.) Closes ticket 25814.
10708 - Our Travis CI configuration now integrates with the Coveralls
10709 coverage analysis tool. Closes ticket 25818.
10711 o Minor features (geoip):
10712 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10713 database. Closes ticket 26104.
10715 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10716 - Don't consider Tor running as a client if the ControlPort is open,
10717 but no actual client ports are open. Fixes bug 26062; bugfix
10720 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10721 - Upon receiving a malformed connected cell, stop processing the
10722 cell immediately. Previously we would mark the connection for
10723 close, but continue processing the cell as if the connection were
10724 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10726 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
10727 - Stop saying in the manual that clients cache ipv4 dns answers from
10728 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10729 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
10730 we forgot to say so in the man page. Fixes bug 26052; bugfix
10733 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10734 - Allow the nanosleep() system call, which glibc uses to implement
10735 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10737 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10738 - Fix a memory leak when a v3 onion service is configured and gets a
10739 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10740 - When parsing the descriptor signature, look for the token plus an
10741 extra white-space at the end. This is more correct but also will
10742 allow us to support new fields that might start with "signature".
10743 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10745 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10746 - Avoid a crash when running with DirPort set but ORPort turned off.
10747 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10749 o Documentation (backport from 0.3.4.1-alpha):
10750 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10751 ticket 25857. Patch from "CTassisF".
10754 Changes in version 0.3.4.1-alpha - 2018-05-17
10755 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
10756 includes refactoring to begin reducing Tor's binary size and idle CPU
10757 usage on mobile, along with prep work for new bandwidth scanners,
10758 improvements to the experimental "vanguards" feature, and numerous
10759 other small features and bugfixes.
10761 o New system requirements:
10762 - Tor no longer tries to support old operating systems without
10763 mmap() or some local equivalent. Apparently, compilation on such
10764 systems has been broken for some time, without anybody noticing or
10765 complaining. Closes ticket 25398.
10767 o Major feature (directory authority, modularization):
10768 - The directory authority subsystem has been modularized. The code
10769 is now located in src/or/dirauth/, and is compiled in by default.
10770 To disable the module, the configure option
10771 --disable-module-dirauth has been added. This module may be
10772 disabled by default in some future release. Closes ticket 25610.
10774 o Major features (main loop, CPU usage):
10775 - When Tor is disabled (via DisableNetwork or via hibernation), it
10776 no longer needs to run any per-second events. This change should
10777 make it easier for mobile applications to disable Tor while the
10778 device is sleeping, or Tor is not running. Closes ticket 26063.
10779 - Tor no longer enables all of its periodic events by default.
10780 Previously, Tor would enable all possible main loop events,
10781 regardless of whether it needed them. Furthermore, many of these
10782 events are now disabled with Tor is hibernating or DisableNetwork
10783 is set. This is a big step towards reducing client CPU usage by
10784 reducing the amount of wake-ups the daemon does. Closes ticket
10786 - The bandwidth-limitation logic has been refactored so that
10787 bandwidth calculations are performed on-demand, rather than every
10788 TokenBucketRefillInterval milliseconds. This change should improve
10789 the granularity of our bandwidth calculations, and limit the
10790 number of times that the Tor process needs to wake up when it is
10791 idle. Closes ticket 25373.
10792 - Move responsibility for many operations from a once-per-second
10793 callback to a callback that is only scheduled as needed. Moving
10794 this functionality has allowed us to disable the callback when
10795 Tor's network is disabled. Once enough items are removed from our
10796 once-per-second callback, we can eliminate it entirely to conserve
10797 CPU when idle. The functionality removed includes: closing
10798 connections, circuits, and channels (ticket 25932); consensus
10799 voting (25937); flushing log callbacks (25951); honoring delayed
10800 SIGNEWNYM requests (25949); rescanning the consensus cache
10801 (25931); saving the state file to disk (25948); warning relay
10802 operators about unreachable ports (25952); and keeping track of
10803 Tor's uptime (26009).
10805 o Major bugfixes (directory authorities, security):
10806 - When directory authorities read a zero-byte bandwidth file, they
10807 would previously log a warning with the contents of an
10808 uninitialised buffer. They now log a warning about the empty file
10809 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10811 o Major bugfixes (crash):
10812 - Avoid a rare assertion failure in the circuit build timeout code
10813 if we fail to allow any circuits to actually complete. Fixes bug
10814 25733; bugfix on 0.2.2.2-alpha.
10816 o Major bugfixes (directory authority):
10817 - Avoid a crash when testing router reachability on a router that
10818 could have an ed25519 ID, but which does not. Fixes bug 25415;
10819 bugfix on 0.3.3.2-alpha.
10821 o Major bugfixes (onion service):
10822 - Correctly detect when onion services get disabled after HUP. Fixes
10823 bug 25761; bugfix on 0.3.2.1.
10825 o Major bugfixes (protover, voting):
10826 - Revise Rust implementation of protover to use a more memory-
10827 efficient voting algorithm and corresponding data structures, thus
10828 avoiding a potential (but small impact) DoS attack where specially
10829 crafted protocol strings would expand to several potential
10830 megabytes in memory. In the process, several portions of code were
10831 revised to be methods on new, custom types, rather than functions
10832 taking interchangeable types, thus increasing type safety of the
10833 module. Custom error types and handling were added as well, in
10834 order to facilitate better error dismissal/handling in outside
10835 crates and avoid mistakenly passing an internal error string to C
10836 over the FFI boundary. Many tests were added, and some previous
10837 differences between the C and Rust implementations have been
10838 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
10840 o Major bugfixes (relay, denial of service):
10841 - Impose a limit on circuit cell queue size. The limit can be
10842 controlled by a consensus parameter. Fixes bug 25226; bugfix
10845 o Minor features (accounting):
10846 - When Tor becomes dormant, it now uses a scheduled event to wake up
10847 at the right time. Previously, we would use the per-second timer
10848 to check whether to wake up, but we no longer have any per-second
10849 timers enabled when the network is disabled. Closes ticket 26064.
10851 o Minor features (code quality):
10852 - Add optional spell-checking for the Tor codebase, using the
10853 "misspell" program. To use this feature, run "make check-typos".
10854 Closes ticket 25024.
10856 o Minor features (compatibility):
10857 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
10858 the no-deprecated option, and builds correctly with them. Closes
10859 tickets 19429, 19981, and 25353.
10860 - Avoid some compilation warnings with recent versions of LibreSSL.
10861 Closes ticket 26006.
10863 o Minor features (compression, zstd):
10864 - When running with zstd, Tor now considers using advanced functions
10865 that the zstd maintainers have labeled as potentially unstable. To
10866 prevent breakage, Tor will only use this functionality when the
10867 runtime version of the zstd library matches the version with which
10868 Tor was compiled. Closes ticket 25162.
10870 o Minor features (configuration):
10871 - The "DownloadSchedule" options have been renamed to end with
10872 "DownloadInitialDelay". The old names are still allowed, but will
10873 produce a warning. Comma-separated lists are still permitted for
10874 these options, but all values after the first are ignored (as they
10875 have been since 0.2.9). Closes ticket 23354.
10877 o Minor features (continuous integration):
10878 - Our .travis.yml configuration now includes support for testing the
10879 results of "make distcheck". (It's not uncommon for "make check"
10880 to pass but "make distcheck" to fail.) Closes ticket 25814.
10881 - Our Travis CI configuration now integrates with the Coveralls
10882 coverage analysis tool. Closes ticket 25818.
10884 o Minor features (control port):
10885 - Introduce GETINFO "current-time/{local,utc}" to return the local
10886 and UTC times respectively in ISO format. This helps a controller
10887 like Tor Browser detect a time-related error. Closes ticket 25511.
10888 Patch by Neel Chauhan.
10889 - Introduce new fields to the CIRC_BW event. There are two new
10890 fields in each of the read and written directions. The DELIVERED
10891 fields report the total valid data on the circuit, as measured by
10892 the payload sizes of verified and error-checked relay command
10893 cells. The OVERHEAD fields report the total unused bytes in each
10894 of these cells. Closes ticket 25903.
10896 o Minor features (directory authority):
10897 - Directory authorities now open their key-pinning files as O_SYNC,
10898 to limit their chances of accidentally writing partial lines.
10899 Closes ticket 23909.
10901 o Minor features (directory authority, forward compatibility):
10902 - Make the lines of the measured bandwidth file able to contain
10903 their entries in any order. Previously, the node_id entry needed
10904 to come first. Closes ticket 26004.
10906 o Minor features (entry guards):
10907 - Introduce a new torrc option NumPrimaryGuards for controlling the
10908 number of primary guards. Closes ticket 25843.
10910 o Minor features (geoip):
10911 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10912 database. Closes ticket 26104.
10914 o Minor features (performance):
10915 - Avoid a needless call to malloc() when processing an incoming
10916 relay cell. Closes ticket 24914.
10917 - Make our timing-wheel code run a tiny bit faster on 32-bit
10918 platforms, by preferring 32-bit math to 64-bit. Closes
10920 - Avoid a needless malloc()/free() pair every time we handle an ntor
10921 handshake. Closes ticket 25150.
10923 o Minor features (testing):
10924 - Add a unit test for voting_schedule_get_start_of_next_interval().
10925 Closes ticket 26014, and helps make unit test coverage
10926 more deterministic.
10927 - A new unittests module specifically for testing the functions in
10928 the (new-ish) bridges.c module has been created with new
10929 unittests, raising the code coverage percentages. Closes 25425.
10930 - We now have improved testing for addressmap_get_virtual_address()
10931 function. This should improve our test coverage, and make our test
10932 coverage more deterministic. Closes ticket 25993.
10934 o Minor features (timekeeping, circuit scheduling):
10935 - When keeping track of how busy each circuit have been recently on
10936 a given connection, use coarse-grained monotonic timers rather
10937 than gettimeofday(). This change should marginally increase
10938 accuracy and performance. Implements part of ticket 25927.
10940 o Minor bugfixes (bandwidth management):
10941 - Consider ourselves "low on write bandwidth" if we have exhausted
10942 our write bandwidth some time in the last second. This was the
10943 documented behavior before, but the actual behavior was to change
10944 this value every TokenBucketRefillInterval. Fixes bug 25828;
10945 bugfix on 0.2.3.5-alpha.
10947 o Minor bugfixes (C correctness):
10948 - Add a missing lock acquisition in the shutdown code of the control
10949 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
10950 Coverity; this is CID 1433643.
10952 o Minor bugfixes (circuit path selection):
10953 - Don't count path selection failures as circuit build failures.
10954 This change should eliminate cases where Tor blames its guard or
10955 the network for situations like insufficient microdescriptors
10956 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10959 o Minor bugfixes (client):
10960 - Don't consider Tor running as a client if the ControlPort is open,
10961 but no actual client ports are open. Fixes bug 26062; bugfix
10964 o Minor bugfixes (code style):
10965 - Fixed multiple includes of transports.h in src/or/connection.c
10966 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
10967 - Remove the unused variable n_possible from the function
10968 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
10970 o Minor bugfixes (control interface):
10971 - Respond with more human-readable error messages to GETINFO exit-
10972 policy/* requests. Also, let controller know if an error is
10973 transient (response code 551) or not (response code 552). Fixes
10974 bug 25852; bugfix on 0.2.8.1-alpha.
10976 o Minor bugfixes (controller):
10977 - Make CIRC_BW event reflect the total of all data sent on a
10978 circuit, including padding and dropped cells. Also fix a mis-
10979 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
10980 bugfix on 0.2.5.2-alpha.
10982 o Minor bugfixes (correctness, client):
10983 - Upon receiving a malformed connected cell, stop processing the cell
10984 immediately. Previously we would mark the connection for close, but
10985 continue processing the cell as if the connection were open. Fixes bug
10986 26072; bugfix on 0.2.4.7-alpha.
10988 o Minor bugfixes (directory client):
10989 - When unverified-consensus is verified, rename it to cached-
10990 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
10991 - Fixed launching a certificate fetch always during the scheduled
10992 periodic consensus fetch by fetching only in those cases when
10993 consensus are waiting for certs. Fixes bug 24740; bugfix
10996 o Minor bugfixes (documentation):
10997 - Stop saying in the manual that clients cache ipv4 dns answers from
10998 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10999 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
11000 we forgot to say so in the man page. Fixes bug 26052; bugfix
11003 o Minor bugfixes (error reporting):
11004 - Improve tolerance for directory authorities with skewed clocks.
11005 Previously, an authority with a clock more than 60 seconds ahead
11006 could cause a client with a correct clock to warn that the
11007 client's clock was behind. Now the clocks of a majority of
11008 directory authorities have to be ahead of the client before this
11009 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
11011 o Minor bugfixes (Linux seccomp2 sandbox):
11012 - Allow the nanosleep() system call, which glibc uses to implement
11013 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
11015 o Minor bugfixes (onion service):
11016 - Fix a memory leak when a v3 onion service is configured and gets a
11017 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
11018 - When parsing the descriptor signature, look for the token plus an
11019 extra white-space at the end. This is more correct but also will
11020 allow us to support new fields that might start with "signature".
11021 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
11023 o Minor bugfixes (path selection):
11024 - Only select relays when they have the descriptors we prefer to use
11025 for them. This change fixes a bug where we could select a relay
11026 because it had _some_ descriptor, but reject it later with a
11027 nonfatal assertion error because it didn't have the exact one we
11028 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
11030 o Minor bugfixes (portability):
11031 - Do not align mmap length, as it is not required by POSIX, and the
11032 getpagesize function is deprecated. Fixes bug 25399; bugfix
11035 o Minor bugfixes (portability, FreeBSD):
11036 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
11037 does not stringify on FreeBSD, so we switch to tor_asprintf().
11038 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
11040 o Minor bugfixes (relay statistics):
11041 - When a relay is collecting internal statistics about how many
11042 create cell requests it has seen of each type, accurately count
11043 the requests from relays that temporarily fall out of the
11044 consensus. (To be extra conservative, we were already ignoring
11045 requests from clients in our counts, and we continue ignoring them
11046 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
11048 o Minor bugfixes (relay, crash):
11049 - Avoid a crash when running with DirPort set but ORPort turned off.
11050 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
11052 o Minor bugfixes (restart-in-process):
11053 - When shutting down, Tor now clears all the flags in the control.c
11054 module. This should prevent a bug where authentication cookies are
11055 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
11057 o Minor bugfixes (testing):
11058 - When testing workqueue event-cancellation, make sure that we
11059 actually cancel an event, and that cancel each event with equal
11060 probability. (It was previously possible, though extremely
11061 unlikely, for our event-canceling test not to cancel any events.)
11062 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
11063 - Repeat part of the test in test_client_pick_intro() a number of
11064 times, to give it consistent coverage. Fixes bug 25996; bugfix
11066 - Remove randomness from the hs_common/responsible_hsdirs test, so
11067 that it always takes the same path through the function it tests.
11068 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
11069 - Change the behavior of the "channel/outbound" test so that it
11070 never causes a 10-second rollover for the EWMA circuitmux code.
11071 Previously, this behavior would happen randomly, and result in
11072 fluctuating test coverage. Fixes bug 25994; bugfix
11074 - Use X509_new() to allocate certificates that will be freed later
11075 with X509_free(). Previously, some parts of the unit tests had
11076 used tor_malloc_zero(), which is incorrect, and which caused test
11077 failures on Windows when they were built with extra hardening.
11078 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
11080 - While running the circuit_timeout test, fix the PRNG to a
11081 deterministic AES stream, so that the test coverage from this test
11082 will itself be deterministic. Fixes bug 25995; bugfix
11085 o Minor bugfixes (vanguards):
11086 - Allow the last hop in a vanguard circuit to be the same as our
11087 first, to prevent the adversary from influencing guard node choice
11088 by choice of last hop. Also prevent the creation of A - B - A
11089 paths, or A - A paths, which are forbidden by relays. Fixes bug
11090 25870; bugfix on 0.3.3.1-alpha.
11092 o Code simplification and refactoring:
11093 - Remove duplicate code in parse_{c,s}method_line and bootstrap
11094 their functionalities into a single function. Fixes bug 6236;
11095 bugfix on 0.2.3.6-alpha.
11096 - We remove the PortForwarding and PortForwardingHelper options,
11097 related functions, and the port_forwarding tests. These options
11098 were used by the now-deprecated Vidalia to help ordinary users
11099 become Tor relays or bridges. Closes ticket 25409. Patch by
11101 - In order to make the OR and dir checking function in router.c less
11102 confusing we renamed some functions and
11103 consider_testing_reachability() has been split into
11104 router_should_check_reachability() and
11105 router_do_reachability_checks(). Also we improved the documentation
11106 in some functions. Closes ticket 18918.
11107 - Initial work to isolate Libevent usage to a handful of modules in
11108 our codebase, to simplify our call structure, and so that we can
11109 more easily change event loops in the future if needed. Closes
11111 - Introduce a function to call getsockname() and return tor_addr_t,
11112 to save a little complexity throughout the codebase. Closes
11114 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
11115 as hsdir_index is always present. Also, we move hsdir_index_t into
11116 or.h. Closes ticket 23094. Patch by Neel Chauhan.
11117 - Merge functions used for describing nodes and suppress the
11118 functions that do not allocate memory for the output buffer
11119 string. NODE_DESC_BUF_LEN constant and format_node_description()
11120 function cannot be used externally from router.c module anymore.
11121 Closes ticket 25432. Patch by valentecaio.
11122 - Our main loop has been simplified so that all important operations
11123 happen inside events. Previously, some operations had to happen
11124 outside the event loop, to prevent infinite sequences of event
11125 activations. Closes ticket 25374.
11126 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
11127 it in register_intro_circ() and service_intro_point_new(). This
11128 prevents the digest from being re-calculated each time. Closes
11129 ticket 23107. Patch by Neel Chauhan.
11130 - Refactor token-bucket implementations to use a common backend.
11131 Closes ticket 25766.
11132 - Remove extern declaration of stats_n_seconds_working variable from
11133 main, protecting its accesses with get_uptime() and reset_uptime()
11134 functions. Closes ticket 25081, patch by “valentecaio”.
11135 - Remove our previous logic for "cached gettimeofday()" -- our
11136 coarse monotonic timers are fast enough for this purpose, and far
11137 less error-prone. Implements part of ticket 25927.
11138 - Remove the return value for fascist_firewall_choose_address_base(),
11139 and sister functions such as fascist_firewall_choose_address_node()
11140 and fascist_firewall_choose_address_rs(). Also, while we're here,
11141 initialize the ap argument as leaving it uninitialized can pose a
11142 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
11143 - Rename two fields of connection_t struct. timestamp_lastwritten is
11144 renamed to timestamp_last_write_allowed and timestamp_lastread is
11145 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
11147 - Since Tor requires C99, remove our old workaround code for libc
11148 implementations where free(NULL) doesn't work. Closes ticket 24484.
11149 - Use our standard rate-limiting code to deal with excessive
11150 libevent failures, rather than the hand-rolled logic we had
11151 before. Closes ticket 26016.
11152 - We remove the return value of node_get_prim_orport() and
11153 node_get_prim_dirport(), and introduce node_get_prim_orport() in
11154 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
11155 check for a null address. Closes ticket 23873. Patch by
11157 - We switch to should_record_bridge_info() in
11158 geoip_note_client_seen() and options_need_geoip_info() instead of
11159 accessing the configuration values directly. Fixes bug 25290;
11160 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
11162 o Deprecated features:
11163 - As we are not recommending 0.2.5 anymore, we require relays that
11164 once had an ed25519 key associated with their RSA key to always
11165 have that key, instead of allowing them to drop back to a version
11166 that didn't support ed25519. This means they need to use a new RSA
11167 key if they want to downgrade to an older version of tor without
11168 ed25519. Closes ticket 20522.
11171 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
11172 ticket 25857. Patch from "CTassisF".
11174 o Removed features:
11175 - Directory authorities will no longer support voting according to
11176 any consensus method before consensus method 25. This keeps
11177 authorities compatible with all authorities running 0.2.9.8 and
11178 later, and does not break any clients or relays. Implements ticket
11179 24378 and proposal 290.
11180 - The PortForwarding and PortForwardingHelper features have been
11181 removed. The reasoning is, given that implementations of NAT
11182 traversal protocols within common consumer grade routers are
11183 frequently buggy, and that the target audience for a NAT punching
11184 feature is a perhaps less-technically-inclined relay operator,
11185 when the helper fails to setup traversal the problems are usually
11186 deep, ugly, and very router specific, making them horrendously
11187 impossible for technical support to reliable assist with, and thus
11188 resulting in frustration all around. Unfortunately, relay
11189 operators who would like to run relays behind NATs will need to
11190 become more familiar with the port forwarding configurations on
11191 their local router. Closes 25409.
11192 - The TestingEnableTbEmptyEvent option has been removed. It was used
11193 in testing simulations to measure how often connection buckets
11194 were emptied, in order to improve our scheduling, but it has not
11195 been actively used in years. Closes ticket 25760.
11196 - The old "round-robin" circuit multiplexer (circuitmux)
11197 implementation has been removed, along with a fairly large set of
11198 code that existed to support it. It has not been the default
11199 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
11200 but it still required an unreasonable amount of memory and CPU.
11201 Closes ticket 25268.
11204 Changes in version 0.3.3.5-rc - 2018-04-15
11205 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
11206 including some that could affect reliability or correctness.
11208 This is the first release candidate in the 0.3.3 series. If we find no
11209 new bugs or regression here, then the first stable 0.3.3 release will
11210 be nearly identical to this one.
11212 o Major bugfixes (security, protover, voting):
11213 - Revise Rust implementation of protover to use a more memory-
11214 efficient voting algorithm and corresponding data structures, thus
11215 avoiding a potential memory-based DoS attack where specially
11216 crafted protocol strings would expand to fill available memory.
11217 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
11219 o Major bugfixes (performance, load balancing):
11220 - Directory authorities no longer vote in favor of the Guard flag
11221 for relays without directory support. Starting in Tor
11222 0.3.0.1-alpha, clients have been avoiding using such relays in the
11223 Guard position, leading to increasingly broken load balancing for
11224 the 5%-or-so of Guards that don't advertise directory support.
11225 Fixes bug 22310; bugfix on 0.3.0.6.
11227 o Minor feature (continuous integration):
11228 - Update the Travis CI configuration to use the stable Rust channel,
11229 now that we have decided to require that. Closes ticket 25714.
11231 o Minor features (config options):
11232 - Change the way the default value for MaxMemInQueues is calculated.
11233 We now use 40% of the hardware RAM if the system has 8 GB RAM or
11234 more. Otherwise we use the former value of 75%. Closes
11237 o Minor features (geoip):
11238 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
11239 Country database. Closes ticket 25718.
11241 o Minor bugfixes (client):
11242 - When using a listed relay as a bridge, and also using
11243 microdescriptors, and considering that relay as a non-bridge in a
11244 circuit, treat its microdescriptor as a valid source of
11245 information about that relay. This change should prevent a non-
11246 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
11248 o Minor bugfixes (controller):
11249 - Restore the correct operation of the RESOLVE command, which had
11250 been broken since we added the ability to enable/disable DNS on
11251 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
11253 o Minor bugfixes (distribution, compilation, rust):
11254 - Build correctly when the rust dependencies submodule is loaded,
11255 but the TOR_RUST_DEPENDENCIES environment variable is not set.
11256 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
11257 - Actually include all of our Rust source in our source
11258 distributions. (Previously, a few of the files were accidentally
11259 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
11261 o Minor bugfixes (documentation):
11262 - Document that the PerConnBW{Rate,Burst} options will fall back to
11263 their corresponding consensus parameters only if those parameters
11264 are set. Previously we had claimed that these values would always
11265 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
11266 - Revert a misformatting issue in the ExitPolicy documentation.
11267 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
11269 o Minor bugfixes (exit relay DNS retries):
11270 - Re-attempt timed-out DNS queries 3 times before failure, since our
11271 timeout is 5 seconds for them, but clients wait 10-15. Also allow
11272 slightly more timeouts per resolver when an exit has multiple
11273 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
11275 o Minor bugfixes (onion services):
11276 - Re-instate counting the client HSDir fetch circuits against the
11277 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
11279 - Remove underscores from the _HSLayer{2,3}Nodes options. This
11280 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
11281 Fixes bug 25581; bugfix on 0.3.3.1-alpha
11283 o Code simplification and refactoring:
11284 - Move the list of default directory authorities to its own file.
11285 Closes ticket 24854. Patch by "beastr0".
11287 o Documentation (manpage, denial of service):
11288 - Provide more detail about the denial-of-service options, by
11289 listing each mitigation and explaining how they relate. Closes
11293 Changes in version 0.3.3.4-alpha - 2018-03-29
11294 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
11295 the alpha testing of earlier releases in its series. We are
11296 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
11298 o New system requirements:
11299 - When built with Rust, Tor now depends on version 0.2.39 of the
11300 libc crate. Closes tickets 25310 and 25664.
11302 o Major bugfixes (relay, connection):
11303 - If we have failed to connect to a relay and received a connection
11304 refused, timeout, or similar error (at the TCP level), do not try
11305 that same address/port again for 60 seconds after the failure has
11306 occurred. Fixes bug 24767; bugfix on 0.0.6.
11308 o Minor features (geoip):
11309 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
11310 Country database. Closes ticket 25469.
11312 o Minor features (log messages):
11313 - Improve log message in the out-of-memory handler to include
11314 information about memory usage from the different compression
11315 backends. Closes ticket 25372.
11317 o Minor features (sandbox):
11318 - Explicitly permit the poll() system call when the Linux
11319 seccomp2-based sandbox is enabled: apparently, some versions of
11320 libc use poll() when calling getpwnam(). Closes ticket 25313.
11322 o Minor bugfixes (C correctness):
11323 - Fix a very unlikely (impossible, we believe) null pointer
11324 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
11325 Coverity; this is CID 1430932.
11327 o Minor bugfixes (channel, client):
11328 - Better identify client connection when reporting to the geoip
11329 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11331 o Minor bugfixes (compilation):
11332 - Fix a C99 compliance issue in our configuration script that caused
11333 compilation issues when compiling Tor with certain versions of
11334 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11336 o Minor bugfixes (controller, reliability):
11337 - Avoid a (nonfatal) assertion failure when extending a one-hop
11338 circuit from the controller to become a multihop circuit. Fixes
11339 bug 24903; bugfix on 0.2.5.2-alpha.
11341 o Major bugfixes (networking):
11342 - Tor will no longer reject IPv6 address strings from Tor Browser
11343 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11344 25036, bugfix on Tor 0.3.1.2.
11346 o Minor bugfixes (networking):
11347 - string_is_valid_hostname() will not consider IP strings to be
11348 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
11350 o Minor bugfixes (onion service v3):
11351 - Avoid an assertion failure when the next onion service
11352 descriptor rotation type is out of sync with the consensus's
11353 valid-after time. Instead, log a warning message with extra
11354 information, so we can better hunt down the cause of this
11355 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
11357 o Minor bugfixes (testing):
11358 - Avoid intermittent test failures due to a test that had relied on
11359 onion service introduction point creation finishing within 5
11360 seconds of real clock time. Fixes bug 25450; bugfix
11362 - Rust crates are now automatically detected and tested. Previously,
11363 some crates were not tested by `make test-rust` due to a static
11364 string in the `src/test/test_rust.sh` script specifying which
11365 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
11367 o Minor bugfixes (testing, benchmarks):
11368 - Fix a crash when running benchmark tests on win32 systems. The
11369 crash was due to a mutex that wasn't initialized before logging
11370 and options were initialized. Fixes bug 25479; bugfix
11373 o Minor bugfixes (warnings, ipv6):
11374 - Avoid a bug warning that could occur when trying to connect to a
11375 relay over IPv6. This warning would occur on a Tor instance that
11376 downloads router descriptors, but prefers to use microdescriptors.
11377 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
11379 o Code simplification and refactoring:
11380 - Remove the old (deterministic) directory retry logic entirely:
11381 We've used exponential backoff exclusively for some time. Closes
11385 - Improved the documentation of AccountingStart parameter. Closes
11387 - Update the documentation for "Log" to include the current list of
11388 logging domains. Closes ticket 25378.
11391 Changes in version 0.3.1.10 - 2018-03-03
11392 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
11395 It includes an important security fix for a remote crash attack
11396 against directory authorities, tracked as TROVE-2018-001.
11398 This release also backports our new system for improved resistance to
11399 denial-of-service attacks against relays.
11401 This release also fixes several minor bugs and annoyances from
11404 All directory authorities should upgrade to one of the versions
11405 released today. Relays running 0.3.1.x may wish to update to one of
11406 the versions released today, for the DoS mitigations.
11408 Please note: according to our release calendar, Tor 0.3.1 will no
11409 longer be supported after 1 July 2018. If you will be running Tor
11410 after that date, you should make sure to plan to upgrade to the latest
11411 stable version, or downgrade to 0.2.9 (which will receive long-term
11414 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11415 - Fix a protocol-list handling bug that could be used to remotely crash
11416 directory authorities with a null-pointer exception. Fixes bug 25074;
11417 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11420 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11421 - Give relays some defenses against the recent network overload. We
11422 start with three defenses (default parameters in parentheses).
11423 First: if a single client address makes too many concurrent
11424 connections (>100), hang up on further connections. Second: if a
11425 single client address makes circuits too quickly (more than 3 per
11426 second, with an allowed burst of 90) while also having too many
11427 connections open (3), refuse new create cells for the next while
11428 (1-2 hours). Third: if a client asks to establish a rendezvous
11429 point to you directly, ignore the request. These defenses can be
11430 manually controlled by new torrc options, but relays will also
11431 take guidance from consensus parameters, so there's no need to
11432 configure anything manually. Implements ticket 24902.
11434 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11435 - Update the sandbox rules so that they should now work correctly
11436 with Glibc 2.26. Closes ticket 24315.
11438 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11439 - Fix an "off by 2" error in counting rendezvous failures on the
11440 onion service side. While we thought we would stop the rendezvous
11441 attempt after one failed circuit, we were actually making three
11442 circuit attempts before giving up. Now switch to a default of 2,
11443 and allow the consensus parameter "hs_service_max_rdv_failures" to
11444 override. Fixes bug 24895; bugfix on 0.0.6.
11446 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11447 - Add Link protocol version 5 to the supported protocols list. Fixes
11448 bug 25070; bugfix on 0.3.1.1-alpha.
11450 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11451 - Fix a set of false positives where relays would consider
11452 connections to other relays as being client-only connections (and
11453 thus e.g. deserving different link padding schemes) if those
11454 relays fell out of the consensus briefly. Now we look only at the
11455 initial handshake and whether the connection authenticated as a
11456 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11458 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11459 - Make our OOM handler aware of the geoip client history cache so it
11460 doesn't fill up the memory. This check is important for IPv6 and
11461 our DoS mitigation subsystem. Closes ticket 25122.
11463 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
11464 - Change relay bandwidth reporting stats interval from 4 hours to 24
11465 hours in order to reduce the efficiency of guard discovery
11466 attacks. Fixes ticket 23856.
11468 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11469 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11470 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11471 since they neither disabled TLS 1.3 nor enabled any of the
11472 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11473 Closes ticket 24978.
11475 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
11476 - The fallback directory list has been re-generated based on the
11477 current status of the network. Tor uses fallback directories to
11478 bootstrap when it doesn't yet have up-to-date directory
11479 information. Closes ticket 24801.
11480 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11481 prefer to bootstrap from fallback directory mirrors. This is a
11482 follow-up to 24679, which removed weights from the default
11483 fallbacks. Implements ticket 24681.
11485 o Minor features (geoip):
11486 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11489 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11490 - Use the actual observed address of an incoming relay connection,
11491 not the canonical address of the relay from its descriptor, when
11492 making decisions about how to handle the incoming connection.
11493 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11495 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11496 - Directory authorities, when refusing a descriptor from a rejected
11497 relay, now explicitly tell the relay (in its logs) to set a valid
11498 ContactInfo address and contact the bad-relays@ mailing list.
11499 Fixes bug 25170; bugfix on 0.2.9.1.
11501 o Minor bugfixes (address selection, backport from 0.3.2.9):
11502 - When the fascist_firewall_choose_address_ functions don't find a
11503 reachable address, set the returned address to the null address
11504 and port. This is a precautionary measure, because some callers do
11505 not check the return value. Fixes bug 24736; bugfix
11508 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
11509 - Fetch descriptors aggressively whenever we lack enough to build
11510 circuits, regardless of how many descriptors we are missing.
11511 Previously, we would delay launching the fetch when we had fewer
11512 than 15 missing descriptors, even if some of those descriptors
11513 were blocking circuits from building. Fixes bug 23985; bugfix on
11514 0.1.1.11-alpha. The effects of this bug became worse in
11515 0.3.0.3-alpha, when we began treating missing descriptors from our
11516 primary guards as a reason to delay circuits.
11517 - Don't try fetching microdescriptors from relays that have failed
11518 to deliver them in the past. Fixes bug 23817; bugfix
11521 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
11522 - Fix a signed/unsigned comparison warning introduced by our fix to
11523 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11525 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11526 - Avoid a crash when attempting to use the seccomp2 sandbox together
11527 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11530 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11531 - Fix a possible crash on malformed consensus. If a consensus had
11532 contained an unparseable protocol line, it could have made clients
11533 and relays crash with a null-pointer exception. To exploit this
11534 issue, however, an attacker would need to be able to subvert the
11535 directory authority system. Fixes bug 25251; bugfix on
11536 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11538 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
11539 - Recover better from empty or corrupt files in the consensus cache
11540 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11541 - When a consensus diff calculation is only partially successful,
11542 only record the successful parts as having succeeded. Partial
11543 success can happen if (for example) one compression method fails
11544 but the others succeed. Previously we misrecorded all the
11545 calculations as having succeeded, which would later cause a
11546 nonfatal assertion failure. Fixes bug 24086; bugfix
11549 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
11550 - Tor now updates its guard state when it reads a consensus
11551 regardless of whether it's missing descriptors. That makes tor use
11552 its primary guards to fetch descriptors in some edge cases where
11553 it would previously have used fallback directories. Fixes bug
11554 23862; bugfix on 0.3.0.1-alpha.
11556 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11557 - Don't treat inability to store a cached consensus object as a bug:
11558 it can happen normally when we are out of disk space. Fixes bug
11559 24859; bugfix on 0.3.1.1-alpha.
11561 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
11562 - When queuing DESTROY cells on a channel, only queue the circuit-id
11563 and reason fields: not the entire 514-byte cell. This fix should
11564 help mitigate any bugs or attacks that fill up these queues, and
11565 free more RAM for other uses. Fixes bug 24666; bugfix
11568 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
11569 - When closing a connection via close_connection_immediately(), we
11570 mark it as "not blocked on bandwidth", to prevent later calls from
11571 trying to unblock it, and give it permission to read. This fixes a
11572 backtrace warning that can happen on relays under various
11573 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11575 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
11576 - When selecting relays by bandwidth, avoid a rounding error that
11577 could sometimes cause load to be imbalanced incorrectly.
11578 Previously, we would always round upwards; now, we round towards
11579 the nearest integer. This had the biggest effect when a relay's
11580 weight adjustments should have given it weight 0, but it got
11581 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11582 - When calculating the fraction of nodes that have descriptors, and
11583 all nodes in the network have zero bandwidths, count the number of
11584 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11585 - Actually log the total bandwidth in compute_weighted_bandwidths().
11586 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11588 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11589 - Improve the performance of our consensus-diff application code
11590 when Tor is built with the --enable-fragile-hardening option set.
11591 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11593 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11594 - Don't exit the Tor process if setrlimit() fails to change the file
11595 limit (which can happen sometimes on some versions of OSX). Fixes
11596 bug 21074; bugfix on 0.0.9pre5.
11598 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
11599 - Fix a bug in the bit-counting parts of our timing-wheel code on
11600 MSVC. (Note that MSVC is still not a supported build platform, due
11601 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
11604 o Minor bugfixes (relay, partial backport):
11605 - Make the internal channel_is_client() function look at what sort
11606 of connection handshake the other side used, rather than whether
11607 the other side ever sent a create_fast cell to us. Backports part
11608 of the fixes from bugs 22805 and 24898.
11610 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11611 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11613 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11614 bugfix on 0.2.9.4-alpha.
11616 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11617 - Update the "rust dependencies" submodule to be a project-level
11618 repository, rather than a user repository. Closes ticket 25323.
11621 Changes in version 0.2.9.15 - 2018-03-03
11622 Tor 0.2.9.15 backports important security and stability bugfixes from
11623 later Tor releases.
11625 It includes an important security fix for a remote crash attack
11626 against directory authorities, tracked as TROVE-2018-001.
11628 This release also backports our new system for improved resistance to
11629 denial-of-service attacks against relays.
11631 This release also fixes several minor bugs and annoyances from
11634 All directory authorities should upgrade to one of the versions
11635 released today. Relays running 0.2.9.x may wish to update to one of
11636 the versions released today, for the DoS mitigations.
11638 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11639 - Fix a protocol-list handling bug that could be used to remotely crash
11640 directory authorities with a null-pointer exception. Fixes bug 25074;
11641 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11644 o Major features (denial-of-service mitigation):
11645 - Give relays some defenses against the recent network overload. We
11646 start with three defenses (default parameters in parentheses).
11647 First: if a single client address makes too many concurrent
11648 connections (>100), hang up on further connections. Second: if a
11649 single client address makes circuits too quickly (more than 3 per
11650 second, with an allowed burst of 90) while also having too many
11651 connections open (3), refuse new create cells for the next while
11652 (1-2 hours). Third: if a client asks to establish a rendezvous
11653 point to you directly, ignore the request. These defenses can be
11654 manually controlled by new torrc options, but relays will also
11655 take guidance from consensus parameters, so there's no need to
11656 configure anything manually. Implements ticket 24902.
11658 o Major bugfixes (bootstrapping):
11659 - Fetch descriptors aggressively whenever we lack enough to build
11660 circuits, regardless of how many descriptors we are missing.
11661 Previously, we would delay launching the fetch when we had fewer
11662 than 15 missing descriptors, even if some of those descriptors
11663 were blocking circuits from building. Fixes bug 23985; bugfix on
11664 0.1.1.11-alpha. The effects of this bug became worse in
11665 0.3.0.3-alpha, when we began treating missing descriptors from our
11666 primary guards as a reason to delay circuits.
11668 o Major bugfixes (onion services, retry behavior):
11669 - Fix an "off by 2" error in counting rendezvous failures on the
11670 onion service side. While we thought we would stop the rendezvous
11671 attempt after one failed circuit, we were actually making three
11672 circuit attempts before giving up. Now switch to a default of 2,
11673 and allow the consensus parameter "hs_service_max_rdv_failures" to
11674 override. Fixes bug 24895; bugfix on 0.0.6.
11676 o Minor feature (relay statistics):
11677 - Change relay bandwidth reporting stats interval from 4 hours to 24
11678 hours in order to reduce the efficiency of guard discovery
11679 attacks. Fixes ticket 23856.
11681 o Minor features (compatibility, OpenSSL):
11682 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11683 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11684 since they neither disabled TLS 1.3 nor enabled any of the
11685 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11686 Closes ticket 24978.
11688 o Minor features (denial-of-service avoidance):
11689 - Make our OOM handler aware of the geoip client history cache so it
11690 doesn't fill up the memory. This check is important for IPv6 and
11691 our DoS mitigation subsystem. Closes ticket 25122.
11693 o Minor features (fallback directory mirrors):
11694 - The fallback directory list has been re-generated based on the
11695 current status of the network. Tor uses fallback directories to
11696 bootstrap when it doesn't yet have up-to-date directory
11697 information. Closes ticket 24801.
11698 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11699 prefer to bootstrap from fallback directory mirrors. This is a
11700 follow-up to 24679, which removed weights from the default
11701 fallbacks. Implements ticket 24681.
11703 o Minor features (geoip):
11704 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11707 o Minor features (linux seccomp2 sandbox):
11708 - Update the sandbox rules so that they should now work correctly
11709 with Glibc 2.26. Closes ticket 24315.
11711 o Minor bugfix (channel connection):
11712 - Use the actual observed address of an incoming relay connection,
11713 not the canonical address of the relay from its descriptor, when
11714 making decisions about how to handle the incoming connection.
11715 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11717 o Minor bugfix (directory authority):
11718 - Directory authorities, when refusing a descriptor from a rejected
11719 relay, now explicitly tell the relay (in its logs) to set a valid
11720 ContactInfo address and contact the bad-relays@ mailing list.
11721 Fixes bug 25170; bugfix on 0.2.9.1.
11723 o Minor bugfixes (address selection):
11724 - When the fascist_firewall_choose_address_ functions don't find a
11725 reachable address, set the returned address to the null address
11726 and port. This is a precautionary measure, because some callers do
11727 not check the return value. Fixes bug 24736; bugfix
11730 o Minor bugfixes (compilation):
11731 - Fix a signed/unsigned comparison warning introduced by our fix to
11732 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11734 o Minor bugfixes (control port, linux seccomp2 sandbox):
11735 - Avoid a crash when attempting to use the seccomp2 sandbox together
11736 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11739 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11740 - Fix a possible crash on malformed consensus. If a consensus had
11741 contained an unparseable protocol line, it could have made clients
11742 and relays crash with a null-pointer exception. To exploit this
11743 issue, however, an attacker would need to be able to subvert the
11744 directory authority system. Fixes bug 25251; bugfix on
11745 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11747 o Minor bugfixes (memory usage):
11748 - When queuing DESTROY cells on a channel, only queue the circuit-id
11749 and reason fields: not the entire 514-byte cell. This fix should
11750 help mitigate any bugs or attacks that fill up these queues, and
11751 free more RAM for other uses. Fixes bug 24666; bugfix
11754 o Minor bugfixes (network layer):
11755 - When closing a connection via close_connection_immediately(), we
11756 mark it as "not blocked on bandwidth", to prevent later calls from
11757 trying to unblock it, and give it permission to read. This fixes a
11758 backtrace warning that can happen on relays under various
11759 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11761 o Minor bugfixes (OSX):
11762 - Don't exit the Tor process if setrlimit() fails to change the file
11763 limit (which can happen sometimes on some versions of OSX). Fixes
11764 bug 21074; bugfix on 0.0.9pre5.
11766 o Minor bugfixes (path selection):
11767 - When selecting relays by bandwidth, avoid a rounding error that
11768 could sometimes cause load to be imbalanced incorrectly.
11769 Previously, we would always round upwards; now, we round towards
11770 the nearest integer. This had the biggest effect when a relay's
11771 weight adjustments should have given it weight 0, but it got
11772 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11773 - When calculating the fraction of nodes that have descriptors, and
11774 all nodes in the network have zero bandwidths, count the number of
11775 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11776 - Actually log the total bandwidth in compute_weighted_bandwidths().
11777 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11779 o Minor bugfixes (portability, msvc):
11780 - Fix a bug in the bit-counting parts of our timing-wheel code on
11781 MSVC. (Note that MSVC is still not a supported build platform, due
11782 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11785 o Minor bugfixes (relay):
11786 - Make the internal channel_is_client() function look at what sort
11787 of connection handshake the other side used, rather than whether
11788 the other side ever sent a create_fast cell to us. Backports part
11789 of the fixes from bugs 22805 and 24898.
11791 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11792 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11794 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11795 bugfix on 0.2.9.4-alpha.
11798 Changes in version 0.3.2.10 - 2018-03-03
11799 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
11800 backports a number of bugfixes, including important fixes for security
11803 It includes an important security fix for a remote crash attack
11804 against directory authorities, tracked as TROVE-2018-001.
11806 Additionally, it backports a fix for a bug whose severity we have
11807 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
11808 triggered in order to crash relays with a use-after-free pattern. As
11809 such, we are now tracking that bug as TROVE-2018-002 and
11810 CVE-2018-0491, and backporting it to earlier releases. This bug
11811 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
11814 This release also backports our new system for improved resistance to
11815 denial-of-service attacks against relays.
11817 This release also fixes several minor bugs and annoyances from
11820 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
11821 today, for the fix to TROVE-2018-002. Directory authorities should
11822 also upgrade. (Relays on earlier versions might want to update too for
11823 the DoS mitigations.)
11825 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11826 - Fix a protocol-list handling bug that could be used to remotely crash
11827 directory authorities with a null-pointer exception. Fixes bug 25074;
11828 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11831 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
11832 - Avoid adding the same channel twice in the KIST scheduler pending
11833 list, which could lead to remote denial-of-service use-after-free
11834 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
11836 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11837 - Give relays some defenses against the recent network overload. We
11838 start with three defenses (default parameters in parentheses).
11839 First: if a single client address makes too many concurrent
11840 connections (>100), hang up on further connections. Second: if a
11841 single client address makes circuits too quickly (more than 3 per
11842 second, with an allowed burst of 90) while also having too many
11843 connections open (3), refuse new create cells for the next while
11844 (1-2 hours). Third: if a client asks to establish a rendezvous
11845 point to you directly, ignore the request. These defenses can be
11846 manually controlled by new torrc options, but relays will also
11847 take guidance from consensus parameters, so there's no need to
11848 configure anything manually. Implements ticket 24902.
11850 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11851 - Fix an "off by 2" error in counting rendezvous failures on the
11852 onion service side. While we thought we would stop the rendezvous
11853 attempt after one failed circuit, we were actually making three
11854 circuit attempts before giving up. Now switch to a default of 2,
11855 and allow the consensus parameter "hs_service_max_rdv_failures" to
11856 override. Fixes bug 24895; bugfix on 0.0.6.
11857 - New-style (v3) onion services now obey the "max rendezvous circuit
11858 attempts" logic. Previously they would make as many rendezvous
11859 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11860 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11862 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11863 - Add Link protocol version 5 to the supported protocols list. Fixes
11864 bug 25070; bugfix on 0.3.1.1-alpha.
11866 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11867 - Fix a set of false positives where relays would consider
11868 connections to other relays as being client-only connections (and
11869 thus e.g. deserving different link padding schemes) if those
11870 relays fell out of the consensus briefly. Now we look only at the
11871 initial handshake and whether the connection authenticated as a
11872 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11874 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
11875 - The scheduler subsystem was failing to promptly notice changes in
11876 consensus parameters, making it harder to switch schedulers
11877 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
11879 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11880 - Make our OOM handler aware of the geoip client history cache so it
11881 doesn't fill up the memory. This check is important for IPv6 and
11882 our DoS mitigation subsystem. Closes ticket 25122.
11884 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11885 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11886 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11887 since they neither disabled TLS 1.3 nor enabled any of the
11888 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11889 Closes ticket 24978.
11891 o Minor features (geoip):
11892 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11895 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
11896 - When logging a failure to create an onion service's descriptor,
11897 also log what the problem with the descriptor was. Diagnostic
11900 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11901 - Use the actual observed address of an incoming relay connection,
11902 not the canonical address of the relay from its descriptor, when
11903 making decisions about how to handle the incoming connection.
11904 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11906 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11907 - Fix a possible crash on malformed consensus. If a consensus had
11908 contained an unparseable protocol line, it could have made clients
11909 and relays crash with a null-pointer exception. To exploit this
11910 issue, however, an attacker would need to be able to subvert the
11911 directory authority system. Fixes bug 25251; bugfix on
11912 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11914 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11915 - Directory authorities, when refusing a descriptor from a rejected
11916 relay, now explicitly tell the relay (in its logs) to set a valid
11917 ContactInfo address and contact the bad-relays@ mailing list.
11918 Fixes bug 25170; bugfix on 0.2.9.1.
11920 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
11921 - When building with Rust on OSX, link against libresolv, to work
11922 around the issue at https://github.com/rust-lang/rust/issues/46797.
11923 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11925 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
11926 - Remove a BUG() statement when a client fetches an onion descriptor
11927 that has a lower revision counter than the one in its cache. This
11928 can happen in normal circumstances due to HSDir desync. Fixes bug
11929 24976; bugfix on 0.3.2.1-alpha.
11931 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11932 - Don't treat inability to store a cached consensus object as a bug:
11933 it can happen normally when we are out of disk space. Fixes bug
11934 24859; bugfix on 0.3.1.1-alpha.
11936 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11937 - Improve the performance of our consensus-diff application code
11938 when Tor is built with the --enable-fragile-hardening option set.
11939 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11941 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11942 - Don't exit the Tor process if setrlimit() fails to change the file
11943 limit (which can happen sometimes on some versions of OSX). Fixes
11944 bug 21074; bugfix on 0.0.9pre5.
11946 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11947 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11949 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11950 bugfix on 0.2.9.4-alpha.
11952 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
11953 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11954 25005; bugfix on 0.3.2.7-rc.
11956 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
11957 - Look at the "HSRend" protocol version, not the "HSDir" protocol
11958 version, when deciding whether a consensus entry can support the
11959 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
11960 bugfix on 0.3.2.1-alpha.
11962 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11963 - Update the "rust dependencies" submodule to be a project-level
11964 repository, rather than a user repository. Closes ticket 25323.
11966 o Documentation (backport from 0.3.3.1-alpha)
11967 - Document that operators who run more than one relay or bridge are
11968 expected to set MyFamily and ContactInfo correctly. Closes
11972 Changes in version 0.3.3.3-alpha - 2018-03-03
11973 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
11974 It includes an important security fix for a remote crash attack
11975 against directory authorities tracked as TROVE-2018-001.
11977 Additionally, with this release, we are upgrading the severity of a
11978 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
11979 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
11980 a use-after-free pattern. As such, we are now tracking that bug as
11981 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
11982 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
11984 This release also fixes several minor bugs and annoyances from
11987 Relays running 0.3.2.x should upgrade to one of the versions released
11988 today, for the fix to TROVE-2018-002. Directory authorities should
11989 also upgrade. (Relays on earlier versions might want to update too for
11990 the DoS mitigations.)
11992 o Major bugfixes (denial-of-service, directory authority):
11993 - Fix a protocol-list handling bug that could be used to remotely crash
11994 directory authorities with a null-pointer exception. Fixes bug 25074;
11995 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11998 o Minor features (compatibility, OpenSSL):
11999 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
12000 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
12001 since they neither disabled TLS 1.3 nor enabled any of the
12002 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
12003 Closes ticket 24978.
12005 o Minor features (logging):
12006 - Clarify the log messages produced when getrandom() or a related
12007 entropy-generation mechanism gives an error. Closes ticket 25120.
12009 o Minor features (testing):
12010 - Add a "make test-rust" target to run the rust tests only. Closes
12013 o Minor bugfixes (denial-of-service):
12014 - Fix a possible crash on malformed consensus. If a consensus had
12015 contained an unparseable protocol line, it could have made clients
12016 and relays crash with a null-pointer exception. To exploit this
12017 issue, however, an attacker would need to be able to subvert the
12018 directory authority system. Fixes bug 25251; bugfix on
12019 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
12021 o Minor bugfixes (DoS mitigation):
12022 - Add extra safety checks when refilling the circuit creation bucket
12023 to ensure we never set a value above the allowed maximum burst.
12024 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
12025 - When a new consensus arrives, don't update our DoS-mitigation
12026 parameters if we aren't a public relay. Fixes bug 25223; bugfix
12029 o Minor bugfixes (man page, SocksPort):
12030 - Remove dead code from the old "SocksSocket" option, and rename
12031 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
12032 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
12034 o Minor bugfixes (performance):
12035 - Reduce the number of circuits that will be opened at once during
12036 the circuit build timeout phase. This is done by increasing the
12037 idle timeout to 3 minutes, and lowering the maximum number of
12038 concurrent learning circuits to 10. Fixes bug 24769; bugfix
12041 o Minor bugfixes (spec conformance):
12042 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
12044 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
12045 bugfix on 0.2.9.4-alpha.
12047 o Minor bugfixes (spec conformance, rust):
12048 - Resolve a denial-of-service issue caused by an infinite loop in
12049 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
12050 Also tracked as TROVE-2018-003.
12052 o Code simplification and refactoring:
12053 - Update the "rust dependencies" submodule to be a project-level
12054 repository, rather than a user repository. Closes ticket 25323.
12057 Changes in version 0.3.3.2-alpha - 2018-02-10
12058 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
12059 introduces a mechanism to handle the high loads that many relay
12060 operators have been reporting recently. It also fixes several bugs in
12061 older releases. If this new code proves reliable, we plan to backport
12062 it to older supported release series.
12064 o Major features (denial-of-service mitigation):
12065 - Give relays some defenses against the recent network overload. We
12066 start with three defenses (default parameters in parentheses).
12067 First: if a single client address makes too many concurrent
12068 connections (>100), hang up on further connections. Second: if a
12069 single client address makes circuits too quickly (more than 3 per
12070 second, with an allowed burst of 90) while also having too many
12071 connections open (3), refuse new create cells for the next while
12072 (1-2 hours). Third: if a client asks to establish a rendezvous
12073 point to you directly, ignore the request. These defenses can be
12074 manually controlled by new torrc options, but relays will also
12075 take guidance from consensus parameters, so there's no need to
12076 configure anything manually. Implements ticket 24902.
12078 o Major bugfixes (netflow padding):
12079 - Stop adding unneeded channel padding right after we finish
12080 flushing to a connection that has been trying to flush for many
12081 seconds. Instead, treat all partial or complete flushes as
12082 activity on the channel, which will defer the time until we need
12083 to add padding. This fix should resolve confusing and scary log
12084 messages like "Channel padding timeout scheduled 221453ms in the
12085 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
12087 o Major bugfixes (protocol versions):
12088 - Add Link protocol version 5 to the supported protocols list. Fixes
12089 bug 25070; bugfix on 0.3.1.1-alpha.
12091 o Major bugfixes (scheduler, consensus):
12092 - The scheduler subsystem was failing to promptly notice changes in
12093 consensus parameters, making it harder to switch schedulers
12094 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
12096 o Minor features (denial-of-service avoidance):
12097 - Make our OOM handler aware of the geoip client history cache so it
12098 doesn't fill up the memory. This check is important for IPv6 and
12099 our DoS mitigation subsystem. Closes ticket 25122.
12101 o Minor features (directory authority):
12102 - When directory authorities are unable to add signatures to a
12103 pending consensus, log the reason why. Closes ticket 24849.
12105 o Minor features (geoip):
12106 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
12109 o Minor features (logging, diagnostic):
12110 - When logging a failure to create an onion service's descriptor,
12111 also log what the problem with the descriptor was. Diagnostic for
12114 o Minor bugfix (channel connection):
12115 - Use the actual observed address of an incoming relay connection,
12116 not the canonical address of the relay from its descriptor, when
12117 making decisions about how to handle the incoming connection.
12118 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
12120 o Minor bugfix (directory authority):
12121 - Directory authorities, when refusing a descriptor from a rejected
12122 relay, now explicitly tell the relay (in its logs) to set a valid
12123 ContactInfo address and contact the bad-relays@ mailing list.
12124 Fixes bug 25170; bugfix on 0.2.9.1.
12126 o Minor bugfixes (all versions of Tor):
12127 - Use the "misspell" tool to detect and fix typos throughout the
12128 source code. Fixes bug 23650; bugfix on various versions of Tor.
12129 Patch from Deepesh Pathak.
12131 o Minor bugfixes (circuit, cannibalization):
12132 - Don't cannibalize preemptively-built circuits if we no longer
12133 recognize their first hop. This situation can happen if our Guard
12134 relay went off the consensus after the circuit was created. Fixes
12135 bug 24469; bugfix on 0.0.6.
12137 o Minor bugfixes (correctness):
12138 - Remove a nonworking, unnecessary check to see whether a circuit
12139 hop's identity digest was set when the circuit failed. Fixes bug
12140 24927; bugfix on 0.2.4.4-alpha.
12142 o Minor bugfixes (logging):
12143 - Don't treat inability to store a cached consensus object as a bug:
12144 it can happen normally when we are out of disk space. Fixes bug
12145 24859; bugfix on 0.3.1.1-alpha.
12146 - Fix a (mostly harmless) race condition when invoking
12147 LOG_PROTOCOL_WARN message from a subthread while the torrc options
12148 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
12150 o Minor bugfixes (onion services):
12151 - Remove a BUG() statement when a client fetches an onion descriptor
12152 that has a lower revision counter than the one in its cache. This
12153 can happen in normal circumstances due to HSDir desync. Fixes bug
12154 24976; bugfix on 0.3.2.1-alpha.
12155 - If we are configured to offer a single onion service, don't log
12156 long-term established one hop rendezvous points in the heartbeat.
12157 Fixes bug 25116; bugfix on 0.2.9.6-rc.
12159 o Minor bugfixes (performance):
12160 - Avoid calling protocol_list_supports_protocol() from inside tight
12161 loops when running with cached routerinfo_t objects. Instead,
12162 summarize the relevant protocols as flags in the routerinfo_t, as
12163 we do for routerstatus_t objects. This change simplifies our code
12164 a little, and saves a large amount of short-term memory allocation
12165 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
12167 o Minor bugfixes (Rust FFI):
12168 - Fix a minor memory leak which would happen whenever the C code
12169 would call the Rust implementation of
12170 protover_get_supported_protocols(). This was due to the C version
12171 returning a static string, whereas the Rust version newly allocated
12172 a CString to pass across the FFI boundary. Consequently, the C
12173 code was not expecting to need to free() what it was given. Fixes
12174 bug 25127; bugfix on 0.3.2.1-alpha.
12176 o Minor bugfixes (scheduler, KIST):
12177 - Avoid adding the same channel twice in the KIST scheduler pending
12178 list, which would waste CPU cycles. Fixes bug 24700; bugfix
12181 o Minor bugfixes (unit test, monotonic time):
12182 - Increase a constant (1msec to 10msec) in the monotonic time test
12183 that makes sure the nsec/usec/msec times read are synchronized.
12184 This change was needed to accommodate slow systems like armel or
12185 when the clock_gettime() is not a VDSO on the running kernel.
12186 Fixes bug 25113; bugfix on 0.2.9.1.
12188 o Minor bugfixes (v3 onion services):
12189 - Look at the "HSRend" protocol version, not the "HSDir" protocol
12190 version, when deciding whether a consensus entry can support the
12191 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
12192 bugfix on 0.3.2.1-alpha.
12194 o Code simplification and refactoring:
12195 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
12197 - Remove a series of counters used to track circuit extend attempts
12198 and connection status but that in reality we aren't using for
12199 anything other than stats logged by a SIGUSR1 signal. Closes
12202 o Documentation (man page):
12203 - The HiddenServiceVersion torrc option accepts only one number:
12204 either version 2 or 3. Closes ticket 25026; bugfix
12208 Changes in version 0.3.3.1-alpha - 2018-01-25
12209 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
12210 several new features to Tor, including several improvements to
12211 bootstrapping, and support for an experimental "vanguards" feature to
12212 resist guard discovery attacks. This series also includes better
12213 support for applications that need to embed Tor or manage v3
12216 o Major features (embedding):
12217 - There is now a documented stable API for programs that need to
12218 embed Tor. See tor_api.h for full documentation and known bugs.
12219 Closes ticket 23684.
12220 - Tor now has support for restarting in the same process.
12221 Controllers that run Tor using the "tor_api.h" interface can now
12222 restart Tor after Tor has exited. This support is incomplete,
12223 however: we fixed crash bugs that prevented it from working at
12224 all, but many bugs probably remain, including a possibility of
12225 security issues. Implements ticket 24581.
12227 o Major features (IPv6, directory documents):
12228 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
12229 consensus. This information makes it easier for IPv6 clients to
12230 bootstrap and choose reachable entry guards. Implements ticket 23826.
12231 - Add consensus method 28, which removes IPv6 ORPorts from
12232 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
12233 are redundant in microdescs. This change will be used by Tor clients
12234 on 0.2.8.x and later. (That is to say, with all Tor clients that
12235 have IPv6 bootstrap and guard support.) Implements ticket 23828.
12236 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
12237 set by different numbers of authorities. Fixes 23870
12240 o Major features (onion service v3, control port):
12241 - The control port now supports commands and events for v3 onion
12242 services. It is now possible to create ephemeral v3 services using
12243 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
12244 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
12245 DEL_ONION) have been extended to support v3 onion services. Closes
12246 ticket 20699; implements proposal 284.
12248 o Major features (onion services):
12249 - Provide torrc options to pin the second and third hops of onion
12250 service circuits to a list of nodes. The option HSLayer2Guards
12251 pins the second hop, and the option HSLayer3Guards pins the third
12252 hop. These options are for use in conjunction with experiments
12253 with "vanguards" for preventing guard enumeration attacks. Closes
12256 o Major features (rust, portability, experimental):
12257 - Tor now ships with an optional implementation of one of its
12258 smaller modules (protover.c) in the Rust programming language. To
12259 try it out, install a Rust build environment, and configure Tor
12260 with "--enable-rust --enable-cargo-online-mode". This should not
12261 cause any user-visible changes, but should help us gain more
12262 experience with Rust, and plan future Rust integration work.
12263 Implementation by Chelsea Komlo. Closes ticket 22840.
12265 o Minor features (storage, configuration):
12266 - Users can store cached directory documents somewhere other than
12267 the DataDirectory by using the CacheDirectory option. Similarly,
12268 the storage location for relay's keys can be overridden with the
12269 KeyDirectory option. Closes ticket 22703.
12271 o Major features (v3 onion services, ipv6):
12272 - When v3 onion service clients send introduce cells, they now
12273 include the IPv6 address of the rendezvous point, if it has one.
12274 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
12275 in future Tor versions, IPv6-only v3 single onion services will be
12276 able to use IPv6 addresses to connect directly to the rendezvous
12277 point. Closes ticket 23577. Patch by Neel Chauhan.
12279 o Major bugfixes (onion services, retry behavior):
12280 - Fix an "off by 2" error in counting rendezvous failures on the
12281 onion service side. While we thought we would stop the rendezvous
12282 attempt after one failed circuit, we were actually making three
12283 circuit attempts before giving up. Now switch to a default of 2,
12284 and allow the consensus parameter "hs_service_max_rdv_failures" to
12285 override. Fixes bug 24895; bugfix on 0.0.6.
12286 - New-style (v3) onion services now obey the "max rendezvous circuit
12287 attempts" logic. Previously they would make as many rendezvous
12288 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
12289 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
12291 o Major bugfixes (relays):
12292 - Fix a set of false positives where relays would consider
12293 connections to other relays as being client-only connections (and
12294 thus e.g. deserving different link padding schemes) if those
12295 relays fell out of the consensus briefly. Now we look only at the
12296 initial handshake and whether the connection authenticated as a
12297 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
12299 o Minor feature (IPv6):
12300 - Make IPv6-only clients wait for microdescs for relays, even if we
12301 were previously using descriptors (or were using them as a bridge)
12302 and have a cached descriptor for them. Implements ticket 23827.
12303 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
12304 them, rather than waiting to download microdescriptors.
12305 Implements ticket 23827.
12307 o Minor features (cleanup):
12308 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
12309 when it stops. Closes ticket 23271.
12311 o Minor features (defensive programming):
12312 - Most of the functions in Tor that free objects have been replaced
12313 with macros that free the objects and set the corresponding
12314 pointers to NULL. This change should help prevent a large class of
12315 dangling pointer bugs. Closes ticket 24337.
12316 - Where possible, the tor_free() macro now only evaluates its input
12317 once. Part of ticket 24337.
12318 - Check that microdesc ed25519 ids are non-zero in
12319 node_get_ed25519_id() before returning them. Implements ticket
12320 24001, patch by "aruna1234".
12322 o Minor features (embedding):
12323 - Tor can now start with a preauthenticated control connection
12324 created by the process that launched it. This feature is meant for
12325 use by programs that want to launch and manage a Tor process
12326 without allowing other programs to manage it as well. For more
12327 information, see the __OwningControllerFD option documented in
12328 control-spec.txt. Closes ticket 23900.
12329 - On most errors that would cause Tor to exit, it now tries to
12330 return from the tor_main() function, rather than calling the
12331 system exit() function. Most users won't notice a difference here,
12332 but it should be significant for programs that run Tor inside
12333 a separate thread: they should now be able to survive Tor's exit
12334 conditions rather than having Tor shut down the entire process.
12335 Closes ticket 23848.
12336 - Applications that want to embed Tor can now tell Tor not to
12337 register any of its own POSIX signal handlers, using the
12338 __DisableSignalHandlers option. Closes ticket 24588.
12340 o Minor features (fallback directory list):
12341 - Avoid selecting fallbacks that change their IP addresses too
12342 often. Select more fallbacks by ignoring the Guard flag, and
12343 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12344 a lower bandwidth, and a higher number of fallbacks per operator
12345 (5% of the list). Implements ticket 24785.
12346 - Update the fallback whitelist and blacklist based on opt-ins and
12347 relay changes. Closes tickets 22321, 24678, 22527, 24135,
12350 o Minor features (fallback directory mirror configuration):
12351 - Add a nickname to each fallback in a C comment. This makes it
12352 easier for operators to find their relays, and allows stem to use
12353 nicknames to identify fallbacks. Implements ticket 24600.
12354 - Add a type and version header to the fallback directory mirror
12355 file. Also add a delimiter to the end of each fallback entry. This
12356 helps external parsers like stem and Relay Search. Implements
12358 - Add an extrainfo cache flag for each fallback in a C comment. This
12359 allows stem to use fallbacks to fetch extra-info documents, rather
12360 than using authorities. Implements ticket 22759.
12361 - Add the generateFallbackDirLine.py script for automatically
12362 generating fallback directory mirror lines from relay fingerprints.
12363 No more typos! Add the lookupFallbackDirContact.py script for
12364 automatically looking up operator contact info from relay
12365 fingerprints. Implements ticket 24706, patch by teor and atagar.
12366 - Reject any fallback directory mirror that serves an expired
12367 consensus. Implements ticket 20942, patch by "minik".
12368 - Remove commas and equals signs from external string inputs to the
12369 fallback list. This avoids format confusion attacks. Implements
12371 - Remove the "weight=10" line from fallback directory mirror
12372 entries. Ticket 24681 will maintain the current fallback weights
12373 by changing Tor's default fallback weight to 10. Implements
12375 - Stop logging excessive information about fallback netblocks.
12376 Implements ticket 24791.
12378 o Minor features (forward-compatibility):
12379 - If a relay supports some link authentication protocol that we do
12380 not recognize, then include that relay's ed25519 key when telling
12381 other relays to extend to it. Previously, we treated future
12382 versions as if they were too old to support ed25519 link
12383 authentication. Closes ticket 20895.
12385 o Minor features (heartbeat):
12386 - Add onion service information to our heartbeat logs, displaying
12387 stats about the activity of configured onion services. Closes
12390 o Minor features (instrumentation, development):
12391 - Add the MainloopStats option to allow developers to get
12392 instrumentation information from the main event loop via the
12393 heartbeat messages. We hope to use this to improve Tor's behavior
12394 when it's trying to sleep. Closes ticket 24605.
12396 o Minor features (log messages):
12397 - Improve a warning message that happens when we fail to re-parse an
12398 old router because of an expired certificate. Closes ticket 20020.
12399 - Make the log more quantitative when we hit MaxMemInQueues
12400 threshold exposing some values. Closes ticket 24501.
12402 o Minor features (logging, android):
12403 - Added support for the Android logging subsystem. Closes
12406 o Minor features (performance):
12407 - Support predictive circuit building for onion service circuits
12408 with multiple layers of guards. Closes ticket 23101.
12409 - Use stdatomic.h where available, rather than mutexes, to implement
12410 atomic_counter_t. Closes ticket 23953.
12412 o Minor features (performance, 32-bit):
12413 - Improve performance on 32-bit systems by avoiding 64-bit division
12414 when calculating the timestamp in milliseconds for channel padding
12415 computations. Implements ticket 24613.
12416 - Improve performance on 32-bit systems by avoiding 64-bit division
12417 when timestamping cells and buffer chunks for OOM calculations.
12418 Implements ticket 24374.
12420 o Minor features (performance, OSX, iOS):
12421 - Use the mach_approximate_time() function (when available) to
12422 implement coarse monotonic time. Having a coarse time function
12423 should avoid a large number of system calls, and improve
12424 performance slightly, especially under load. Closes ticket 24427.
12426 o Minor features (performance, windows):
12427 - Improve performance on Windows Vista and Windows 7 by adjusting
12428 TCP send window size according to the recommendation from
12429 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
12432 o Major features (relay):
12433 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
12434 operator to use a more reasonable ("reduced") exit policy, rather
12435 than the default one. If you want to run an exit node without
12436 thinking too hard about which ports to allow, this one is for you.
12437 Closes ticket 13605. Patch from Neel Chauhan.
12439 o Minor features (testing, debugging, embedding):
12440 - For development purposes, Tor now has a mode in which it runs for
12441 a few seconds, then stops, and starts again without exiting the
12442 process. This mode is meant to help us debug various issues with
12443 ticket 23847. To use this feature, compile with
12444 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
12445 environment variable. This is expected to crash a lot, and is
12446 really meant for developers only. It will likely be removed in a
12447 future release. Implements ticket 24583.
12449 o Minor bugfix (network IPv6 test):
12450 - Tor's test scripts now check if "ping -6 ::1" works when the user
12451 runs "make test-network-all". Fixes bug 24677; bugfix on
12452 0.2.9.3-alpha. Patch by "ffmancera".
12454 o Minor bugfixes (build, rust):
12455 - Fix output of autoconf checks to display success messages for Rust
12456 dependencies and a suitable rustc compiler version. Fixes bug
12457 24612; bugfix on 0.3.1.3-alpha.
12458 - When building with Rust on OSX, link against libresolv, to work
12459 around the issue at https://github.com/rust-lang/rust/issues/46797.
12460 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12461 - Don't pass the --quiet option to cargo: it seems to suppress some
12462 errors, which is not what we want to do when building. Fixes bug
12463 24518; bugfix on 0.3.1.7.
12464 - Build correctly when building from outside Tor's source tree with
12465 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
12468 o Minor bugfixes (directory authorities, IPv6):
12469 - When creating a routerstatus (vote) from a routerinfo (descriptor),
12470 set the IPv6 address to the unspecified IPv6 address, and
12471 explicitly initialize the port to zero. Fixes bug 24488; bugfix
12474 o Minor bugfixes (fallback directory mirrors):
12475 - Make updateFallbackDirs.py search harder for python. (Some OSs
12476 don't put it in /usr/bin.) Fixes bug 24708; bugfix
12479 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
12480 - When hibernating, close connections normally and allow them to
12481 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
12483 - Do not attempt to launch self-reachability tests when entering
12484 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12485 - Resolve several bugs related to descriptor fetching on bridge
12486 clients with bandwidth accounting enabled. (This combination is
12487 not recommended!) Fixes a case of bug 12062; bugfix
12489 - When hibernating, do not attempt to launch DNS checks. Fixes a
12490 case of bug 12062; bugfix on 0.1.2.2-alpha.
12491 - When hibernating, do not try to upload or download descriptors.
12492 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12494 o Minor bugfixes (IPv6, bridges):
12495 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
12496 bugfix on 0.2.8.2-alpha.
12497 - Tor now sets IPv6 address in the routerstatus as well as in the
12498 router descriptors when updating addresses for a bridge. Closes
12499 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
12501 o Minor bugfixes (linux seccomp2 sandbox):
12502 - When running with the sandbox enabled, reload configuration files
12503 correctly even when %include was used. Previously we would crash.
12504 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
12506 o Minor bugfixes (memory leaks):
12507 - Avoid possible at-exit memory leaks related to use of Libevent's
12508 event_base_once() function. (This function tends to leak memory if
12509 the event_base is closed before the event fires.) Fixes bug 24584;
12510 bugfix on 0.2.8.1-alpha.
12511 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
12514 o Minor bugfixes (OSX):
12515 - Don't exit the Tor process if setrlimit() fails to change the file
12516 limit (which can happen sometimes on some versions of OSX). Fixes
12517 bug 21074; bugfix on 0.0.9pre5.
12519 o Minor bugfixes (performance, fragile-hardening):
12520 - Improve the performance of our consensus-diff application code
12521 when Tor is built with the --enable-fragile-hardening option set.
12522 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12524 o Minor bugfixes (performance, timeouts):
12525 - Consider circuits for timeout as soon as they complete a hop. This
12526 is more accurate than applying the timeout in
12527 circuit_expire_building() because that function is only called
12528 once per second, which is now too slow for typical timeouts on the
12529 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
12530 - Use onion service circuits (and other circuits longer than 3 hops)
12531 to calculate a circuit build timeout. Previously, Tor only
12532 calculated its build timeout based on circuits that planned to be
12533 exactly 3 hops long. With this change, we include measurements
12534 from all circuits at the point where they complete their third
12535 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
12537 o Minor bugfixes (testing):
12538 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
12539 bugfix on 0.2.3.1-alpha.
12540 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12541 25005; bugfix on 0.3.2.7-rc.
12543 o Code simplification and refactoring:
12544 - Remove /usr/athena from search path in configure.ac. Closes
12546 - Remove duplicate code in node_has_curve25519_onion_key() and
12547 node_get_curve25519_onion_key(), and add a check for a zero
12548 microdesc curve25519 onion key. Closes ticket 23966, patch by
12549 "aruna1234" and teor.
12550 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
12551 memory allocations with large numbers of OR connections (e.g.
12552 relays). Closes ticket 24119.
12553 - Separate the function that deletes ephemeral files when Tor
12555 - Small changes to Tor's buf_t API to make it suitable for use as a
12556 general-purpose safe string constructor. Closes ticket 22342.
12557 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
12558 avoid source code identifier confusion. Closes ticket 24467.
12559 - The tor_git_revision[] constant no longer needs to be redeclared
12560 by everything that links against the rest of Tor. Done as part of
12561 ticket 23845, to simplify our external API.
12562 - We make extend_info_from_node() use node_get_curve25519_onion_key()
12563 introduced in ticket 23577 to access the curve25519 public keys
12564 rather than accessing it directly. Closes ticket 23760. Patch by
12566 - Add a function to log channels' scheduler state changes to aid
12567 debugging efforts. Closes ticket 24531.
12570 - Add documentation on how to build tor with Rust dependencies
12571 without having to be online. Closes ticket 22907; bugfix
12573 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
12574 traffic. Closes ticket 24318.
12575 - Document that OutboundBindAddress doesn't apply to DNS requests.
12576 Closes ticket 22145. Patch from Aruna Maurya.
12577 - Document that operators who run more than one relay or bridge are
12578 expected to set MyFamily and ContactInfo correctly. Closes
12581 o Code simplification and refactoring (channels):
12582 - Remove the incoming and outgoing channel queues. These were never
12583 used, but still took up a step in our fast path.
12584 - The majority of the channel unit tests have been rewritten and the
12585 code coverage has now been raised to 83.6% for channel.c. Closes
12587 - Remove other dead code from the channel subsystem: All together,
12588 this cleanup has removed more than 1500 lines of code overall and
12589 adding very little except for unit test.
12591 o Code simplification and refactoring (circuit rendezvous):
12592 - Split the client-side rendezvous circuit lookup into two
12593 functions: one that returns only established circuits and another
12594 that returns all kinds of circuits. Closes ticket 23459.
12596 o Code simplification and refactoring (controller):
12597 - Make most of the variables in networkstatus_getinfo_by_purpose()
12598 const. Implements ticket 24489.
12601 Changes in version 0.3.2.9 - 2018-01-09
12602 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
12604 The 0.3.2 series includes our long-anticipated new onion service
12605 design, with numerous security features. (For more information, see
12606 our blog post at https://blog.torproject.org/fall-harvest.) We also
12607 have a new circuit scheduler algorithm for improved performance on
12608 relays everywhere (see https://blog.torproject.org/kist-and-tell),
12609 along with many smaller features and bugfixes.
12611 Per our stable release policy, we plan to support each stable release
12612 series for at least the next nine months, or for three months after
12613 the first stable release of the next series: whichever is longer. If
12614 you need a release with long-term support, we recommend that you stay
12615 with the 0.2.9 series.
12617 Below is a list of the changes since 0.3.2.8-rc. For a list of all
12618 changes since 0.3.1, see the ReleaseNotes file.
12620 o Minor features (fallback directory mirrors):
12621 - The fallback directory list has been re-generated based on the
12622 current status of the network. Tor uses fallback directories to
12623 bootstrap when it doesn't yet have up-to-date directory
12624 information. Closes ticket 24801.
12625 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12626 prefer to bootstrap from fallback directory mirrors. This is a
12627 follow-up to 24679, which removed weights from the default
12628 fallbacks. Implements ticket 24681.
12630 o Minor features (geoip):
12631 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
12634 o Minor bugfixes (address selection):
12635 - When the fascist_firewall_choose_address_ functions don't find a
12636 reachable address, set the returned address to the null address
12637 and port. This is a precautionary measure, because some callers do
12638 not check the return value. Fixes bug 24736; bugfix
12641 o Minor bugfixes (compilation):
12642 - Resolve a few shadowed-variable warnings in the onion service
12643 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
12645 o Minor bugfixes (portability, msvc):
12646 - Fix a bug in the bit-counting parts of our timing-wheel code on
12647 MSVC. (Note that MSVC is still not a supported build platform, due
12648 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12652 Changes in version 0.3.2.8-rc - 2017-12-21
12653 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
12654 schedulers that had led servers under heavy load to overload their
12655 outgoing connections. All relay operators running earlier 0.3.2.x
12656 versions should upgrade. This version also includes a mitigation for
12657 over-full DESTROY queues leading to out-of-memory conditions: if it
12658 works, we will soon backport it to earlier release series.
12660 This is the second release candidate in the 0.3.2 series. If we find
12661 no new bugs or regression here, then the first stable 0.3.2 release
12662 will be nearly identical to this.
12664 o Major bugfixes (KIST, scheduler):
12665 - The KIST scheduler did not correctly account for data already
12666 enqueued in each connection's send socket buffer, particularly in
12667 cases when the TCP/IP congestion window was reduced between
12668 scheduler calls. This situation lead to excessive per-connection
12669 buffering in the kernel, and a potential memory DoS. Fixes bug
12670 24665; bugfix on 0.3.2.1-alpha.
12672 o Minor features (geoip):
12673 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
12676 o Minor bugfixes (hidden service v3):
12677 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
12678 the probability of reaching a service for a client missing
12679 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
12681 o Minor bugfixes (memory usage):
12682 - When queuing DESTROY cells on a channel, only queue the circuit-id
12683 and reason fields: not the entire 514-byte cell. This fix should
12684 help mitigate any bugs or attacks that fill up these queues, and
12685 free more RAM for other uses. Fixes bug 24666; bugfix
12688 o Minor bugfixes (scheduler, KIST):
12689 - Use a sane write limit for KISTLite when writing onto a connection
12690 buffer instead of using INT_MAX and shoving as much as it can.
12691 Because the OOM handler cleans up circuit queues, we are better
12692 off at keeping them in that queue instead of the connection's
12693 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
12696 Changes in version 0.3.2.7-rc - 2017-12-14
12697 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
12698 including some that could affect reliability or correctness.
12700 This is the first release candidate in the 0.3.2 series. If we find no
12701 new bugs or regression here, then the first stable 0.3.2. release will
12702 be nearly identical to this.
12704 o Major bugfixes (circuit prediction):
12705 - Fix circuit prediction logic so that a client doesn't treat a port
12706 as being "handled" by a circuit if that circuit already has
12707 isolation settings on it. This change should make Tor clients more
12708 responsive by improving their chances of having a pre-created
12709 circuit ready for use when a request arrives. Fixes bug 18859;
12710 bugfix on 0.2.3.3-alpha.
12712 o Minor features (logging):
12713 - Provide better warnings when the getrandom() syscall fails. Closes
12716 o Minor features (portability):
12717 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
12718 (It doesn't yet work with the sandbox enabled.) Closes
12721 o Minor bugfixes (bridge clients, bootstrap):
12722 - Retry directory downloads when we get our first bridge descriptor
12723 during bootstrap or while reconnecting to the network. Keep
12724 retrying every time we get a bridge descriptor, until we have a
12725 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
12726 - Stop delaying bridge descriptor fetches when we have cached bridge
12727 descriptors. Instead, only delay bridge descriptor fetches when we
12728 have at least one reachable bridge. Fixes part of bug 24367;
12729 bugfix on 0.2.0.3-alpha.
12730 - Stop delaying directory fetches when we have cached bridge
12731 descriptors. Instead, only delay bridge descriptor fetches when
12732 all our bridges are definitely unreachable. Fixes part of bug
12733 24367; bugfix on 0.2.0.3-alpha.
12735 o Minor bugfixes (compilation):
12736 - Fix a signed/unsigned comparison warning introduced by our fix to
12737 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12739 o Minor bugfixes (correctness):
12740 - Fix several places in our codebase where a C compiler would be
12741 likely to eliminate a check, based on assuming that undefined
12742 behavior had not happened elsewhere in the code. These cases are
12743 usually a sign of redundant checking or dubious arithmetic. Found
12744 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
12745 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
12748 o Minor bugfixes (onion service v3):
12749 - Fix a race where an onion service would launch a new intro circuit
12750 after closing an old one, but fail to register it before freeing
12751 the previously closed circuit. This bug was making the service
12752 unable to find the established intro circuit and thus not upload
12753 its descriptor, thus making a service unavailable for up to 24
12754 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
12756 o Minor bugfixes (scheduler, KIST):
12757 - Properly set the scheduler state of an unopened channel in the
12758 KIST scheduler main loop. This prevents a harmless but annoying
12759 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
12760 - Avoid a possible integer overflow when computing the available
12761 space on the TCP buffer of a channel. This had no security
12762 implications; but could make KIST allow too many cells on a
12763 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
12764 - Downgrade to "info" a harmless warning about the monotonic time
12765 moving backwards: This can happen on platform not supporting
12766 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12769 Changes in version 0.3.2.6-alpha - 2017-12-01
12770 This version of Tor is the latest in the 0.3.2 alpha series. It
12771 includes fixes for several important security issues. All Tor users
12772 should upgrade to this release, or to one of the other releases coming
12775 o Major bugfixes (security):
12776 - Fix a denial of service bug where an attacker could use a
12777 malformed directory object to cause a Tor instance to pause while
12778 OpenSSL would try to read a passphrase from the terminal. (Tor
12779 instances run without a terminal, which is the case for most Tor
12780 packages, are not impacted.) Fixes bug 24246; bugfix on every
12781 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12782 Found by OSS-Fuzz as testcase 6360145429790720.
12783 - Fix a denial of service issue where an attacker could crash a
12784 directory authority using a malformed router descriptor. Fixes bug
12785 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12787 - When checking for replays in the INTRODUCE1 cell data for a
12788 (legacy) onion service, correctly detect replays in the RSA-
12789 encrypted part of the cell. We were previously checking for
12790 replays on the entire cell, but those can be circumvented due to
12791 the malleability of Tor's legacy hybrid encryption. This fix helps
12792 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12793 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12796 o Major bugfixes (security, onion service v2):
12797 - Fix a use-after-free error that could crash v2 Tor onion services
12798 when they failed to open circuits while expiring introduction
12799 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12800 also tracked as TROVE-2017-013 and CVE-2017-8823.
12802 o Major bugfixes (security, relay):
12803 - When running as a relay, make sure that we never build a path
12804 through ourselves, even in the case where we have somehow lost the
12805 version of our descriptor appearing in the consensus. Fixes part
12806 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12807 as TROVE-2017-012 and CVE-2017-8822.
12808 - When running as a relay, make sure that we never choose ourselves
12809 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12810 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12812 o Minor feature (relay statistics):
12813 - Change relay bandwidth reporting stats interval from 4 hours to 24
12814 hours in order to reduce the efficiency of guard discovery
12815 attacks. Fixes ticket 23856.
12817 o Minor features (directory authority):
12818 - Add an IPv6 address for the "bastet" directory authority. Closes
12821 o Minor bugfixes (client):
12822 - By default, do not enable storage of client-side DNS values. These
12823 values were unused by default previously, but they should not have
12824 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
12827 Changes in version 0.3.1.9 - 2017-12-01:
12828 Tor 0.3.1.9 backports important security and stability fixes from the
12829 0.3.2 development series. All Tor users should upgrade to this
12830 release, or to another of the releases coming out today.
12832 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12833 - Fix a denial of service bug where an attacker could use a
12834 malformed directory object to cause a Tor instance to pause while
12835 OpenSSL would try to read a passphrase from the terminal. (Tor
12836 instances run without a terminal, which is the case for most Tor
12837 packages, are not impacted.) Fixes bug 24246; bugfix on every
12838 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12839 Found by OSS-Fuzz as testcase 6360145429790720.
12840 - Fix a denial of service issue where an attacker could crash a
12841 directory authority using a malformed router descriptor. Fixes bug
12842 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12844 - When checking for replays in the INTRODUCE1 cell data for a
12845 (legacy) onion service, correctly detect replays in the RSA-
12846 encrypted part of the cell. We were previously checking for
12847 replays on the entire cell, but those can be circumvented due to
12848 the malleability of Tor's legacy hybrid encryption. This fix helps
12849 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12850 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12853 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12854 - Fix a use-after-free error that could crash v2 Tor onion services
12855 when they failed to open circuits while expiring introduction
12856 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12857 also tracked as TROVE-2017-013 and CVE-2017-8823.
12859 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12860 - When running as a relay, make sure that we never build a path
12861 through ourselves, even in the case where we have somehow lost the
12862 version of our descriptor appearing in the consensus. Fixes part
12863 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12864 as TROVE-2017-012 and CVE-2017-8822.
12865 - When running as a relay, make sure that we never choose ourselves
12866 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12867 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12869 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12870 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12871 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12872 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12873 identifying and finding a workaround to this bug and to Moritz,
12874 Arthur Edelstein, and Roger for helping to track it down and
12877 o Minor features (bridge):
12878 - Bridges now include notice in their descriptors that they are
12879 bridges, and notice of their distribution status, based on their
12880 publication settings. Implements ticket 18329. For more fine-
12881 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12884 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12885 - Add an IPv6 address for the "bastet" directory authority. Closes
12888 o Minor features (geoip):
12889 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12892 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12893 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12894 relays, to prevent spurious address resolutions and descriptor
12895 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12896 bugfix on in 0.2.8.1-alpha.
12898 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12899 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12900 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12902 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12903 - When a circuit is marked for close, do not attempt to package any
12904 cells for channels on that circuit. Previously, we would detect
12905 this condition lower in the call stack, when we noticed that the
12906 circuit had no attached channel, and log an annoying message.
12907 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12909 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
12910 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
12911 so it matches dir-spec.txt. Fixes bug 24262; bugfix
12914 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12915 - Avoid a crash when transitioning from client mode to bridge mode.
12916 Previously, we would launch the worker threads whenever our
12917 "public server" mode changed, but not when our "server" mode
12918 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12921 Changes in version 0.3.0.13 - 2017-12-01
12922 Tor 0.3.0.13 backports important security and stability bugfixes from
12923 later Tor releases. All Tor users should upgrade to this release, or
12924 to another of the releases coming out today.
12926 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12927 2018. If you need a release with long-term support, please stick with
12928 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12930 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12931 - Fix a denial of service bug where an attacker could use a
12932 malformed directory object to cause a Tor instance to pause while
12933 OpenSSL would try to read a passphrase from the terminal. (Tor
12934 instances run without a terminal, which is the case for most Tor
12935 packages, are not impacted.) Fixes bug 24246; bugfix on every
12936 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12937 Found by OSS-Fuzz as testcase 6360145429790720.
12938 - Fix a denial of service issue where an attacker could crash a
12939 directory authority using a malformed router descriptor. Fixes bug
12940 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12942 - When checking for replays in the INTRODUCE1 cell data for a
12943 (legacy) onion service, correctly detect replays in the RSA-
12944 encrypted part of the cell. We were previously checking for
12945 replays on the entire cell, but those can be circumvented due to
12946 the malleability of Tor's legacy hybrid encryption. This fix helps
12947 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12948 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12951 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12952 - Fix a use-after-free error that could crash v2 Tor onion services
12953 when they failed to open circuits while expiring introduction
12954 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12955 also tracked as TROVE-2017-013 and CVE-2017-8823.
12957 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12958 - When running as a relay, make sure that we never build a path
12959 through ourselves, even in the case where we have somehow lost the
12960 version of our descriptor appearing in the consensus. Fixes part
12961 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12962 as TROVE-2017-012 and CVE-2017-8822.
12963 - When running as a relay, make sure that we never choose ourselves
12964 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12965 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12967 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12968 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12969 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12970 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12971 identifying and finding a workaround to this bug and to Moritz,
12972 Arthur Edelstein, and Roger for helping to track it down and
12975 o Minor features (security, windows, backport from 0.3.1.1-alpha):
12976 - Enable a couple of pieces of Windows hardening: one
12977 (HeapEnableTerminationOnCorruption) that has been on-by-default
12978 since Windows 8, and unavailable before Windows 7; and one
12979 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
12980 affect us, but shouldn't do any harm. Closes ticket 21953.
12982 o Minor features (bridge, backport from 0.3.1.9):
12983 - Bridges now include notice in their descriptors that they are
12984 bridges, and notice of their distribution status, based on their
12985 publication settings. Implements ticket 18329. For more fine-
12986 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12989 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12990 - Add an IPv6 address for the "bastet" directory authority. Closes
12993 o Minor features (geoip):
12994 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12997 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12998 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12999 relays, to prevent spurious address resolutions and descriptor
13000 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13001 bugfix on in 0.2.8.1-alpha.
13003 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13004 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13005 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13007 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13008 - When a circuit is marked for close, do not attempt to package any
13009 cells for channels on that circuit. Previously, we would detect
13010 this condition lower in the call stack, when we noticed that the
13011 circuit had no attached channel, and log an annoying message.
13012 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13014 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13015 - Avoid a crash when transitioning from client mode to bridge mode.
13016 Previously, we would launch the worker threads whenever our
13017 "public server" mode changed, but not when our "server" mode
13018 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13020 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13021 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13022 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13025 Changes in version 0.2.9.14 - 2017-12-01
13026 Tor 0.3.0.13 backports important security and stability bugfixes from
13027 later Tor releases. All Tor users should upgrade to this release, or
13028 to another of the releases coming out today.
13030 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
13031 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13032 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13033 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13034 identifying and finding a workaround to this bug and to Moritz,
13035 Arthur Edelstein, and Roger for helping to track it down and
13038 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13039 - Fix a denial of service bug where an attacker could use a
13040 malformed directory object to cause a Tor instance to pause while
13041 OpenSSL would try to read a passphrase from the terminal. (Tor
13042 instances run without a terminal, which is the case for most Tor
13043 packages, are not impacted.) Fixes bug 24246; bugfix on every
13044 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13045 Found by OSS-Fuzz as testcase 6360145429790720.
13046 - Fix a denial of service issue where an attacker could crash a
13047 directory authority using a malformed router descriptor. Fixes bug
13048 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
13050 - When checking for replays in the INTRODUCE1 cell data for a
13051 (legacy) onion service, correctly detect replays in the RSA-
13052 encrypted part of the cell. We were previously checking for
13053 replays on the entire cell, but those can be circumvented due to
13054 the malleability of Tor's legacy hybrid encryption. This fix helps
13055 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13056 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13059 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13060 - Fix a use-after-free error that could crash v2 Tor onion services
13061 when they failed to open circuits while expiring introduction
13062 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13063 also tracked as TROVE-2017-013 and CVE-2017-8823.
13065 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13066 - When running as a relay, make sure that we never build a path
13067 through ourselves, even in the case where we have somehow lost the
13068 version of our descriptor appearing in the consensus. Fixes part
13069 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13070 as TROVE-2017-012 and CVE-2017-8822.
13072 o Minor features (bridge, backport from 0.3.1.9):
13073 - Bridges now include notice in their descriptors that they are
13074 bridges, and notice of their distribution status, based on their
13075 publication settings. Implements ticket 18329. For more fine-
13076 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13079 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13080 - Add an IPv6 address for the "bastet" directory authority. Closes
13083 o Minor features (geoip):
13084 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13087 o Minor features (security, windows, backport from 0.3.1.1-alpha):
13088 - Enable a couple of pieces of Windows hardening: one
13089 (HeapEnableTerminationOnCorruption) that has been on-by-default
13090 since Windows 8, and unavailable before Windows 7; and one
13091 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
13092 affect us, but shouldn't do any harm. Closes ticket 21953.
13094 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
13095 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13096 relays, to prevent spurious address resolutions and descriptor
13097 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13098 bugfix on in 0.2.8.1-alpha.
13100 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
13101 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
13102 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13104 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
13105 - When a circuit is marked for close, do not attempt to package any
13106 cells for channels on that circuit. Previously, we would detect
13107 this condition lower in the call stack, when we noticed that the
13108 circuit had no attached channel, and log an annoying message.
13109 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13111 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
13112 - Avoid a crash when transitioning from client mode to bridge mode.
13113 Previously, we would launch the worker threads whenever our
13114 "public server" mode changed, but not when our "server" mode
13115 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13117 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13118 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13119 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13122 Changes in version 0.2.8.17 - 2017-12-01
13123 Tor 0.2.8.17 backports important security and stability bugfixes from
13124 later Tor releases. All Tor users should upgrade to this release, or
13125 to another of the releases coming out today.
13127 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13128 2018. If you need a release with long-term support, please upgrade with
13129 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13131 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13132 - Fix a denial of service bug where an attacker could use a
13133 malformed directory object to cause a Tor instance to pause while
13134 OpenSSL would try to read a passphrase from the terminal. (Tor
13135 instances run without a terminal, which is the case for most Tor
13136 packages, are not impacted.) Fixes bug 24246; bugfix on every
13137 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13138 Found by OSS-Fuzz as testcase 6360145429790720.
13139 - When checking for replays in the INTRODUCE1 cell data for a
13140 (legacy) onion service, correctly detect replays in the RSA-
13141 encrypted part of the cell. We were previously checking for
13142 replays on the entire cell, but those can be circumvented due to
13143 the malleability of Tor's legacy hybrid encryption. This fix helps
13144 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13145 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13148 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
13149 - Fix a use-after-free error that could crash v2 Tor onion services
13150 when they failed to open circuits while expiring introduction
13151 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
13152 also tracked as TROVE-2017-013 and CVE-2017-8823.
13154 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13155 - When running as a relay, make sure that we never build a path through
13156 ourselves, even in the case where we have somehow lost the version of
13157 our descriptor appearing in the consensus. Fixes part of bug 21534;
13158 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
13161 o Minor features (bridge, backport from 0.3.1.9):
13162 - Bridges now include notice in their descriptors that they are
13163 bridges, and notice of their distribution status, based on their
13164 publication settings. Implements ticket 18329. For more fine-
13165 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13168 o Minor features (directory authority, backport from 0.3.2.6-alpha):
13169 - Add an IPv6 address for the "bastet" directory authority. Closes
13172 o Minor features (geoip):
13173 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13176 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
13177 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13178 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13181 Changes in version 0.2.5.16 - 2017-12-01
13182 Tor 0.2.5.13 backports important security and stability bugfixes from
13183 later Tor releases. All Tor users should upgrade to this release, or
13184 to another of the releases coming out today.
13186 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13187 2018. If you need a release with long-term support, please upgrade to
13188 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13190 o Major bugfixes (security, backport from 0.3.2.6-alpha):
13191 - Fix a denial of service bug where an attacker could use a
13192 malformed directory object to cause a Tor instance to pause while
13193 OpenSSL would try to read a passphrase from the terminal. (Tor
13194 instances run without a terminal, which is the case for most Tor
13195 packages, are not impacted.) Fixes bug 24246; bugfix on every
13196 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
13197 Found by OSS-Fuzz as testcase 6360145429790720.
13198 - When checking for replays in the INTRODUCE1 cell data for a
13199 (legacy) onion service, correctly detect replays in the RSA-
13200 encrypted part of the cell. We were previously checking for
13201 replays on the entire cell, but those can be circumvented due to
13202 the malleability of Tor's legacy hybrid encryption. This fix helps
13203 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
13204 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
13207 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
13208 - When running as a relay, make sure that we never build a path
13209 through ourselves, even in the case where we have somehow lost the
13210 version of our descriptor appearing in the consensus. Fixes part
13211 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
13212 as TROVE-2017-012 and CVE-2017-8822.
13214 o Minor features (bridge, backport from 0.3.1.9):
13215 - Bridges now include notice in their descriptors that they are
13216 bridges, and notice of their distribution status, based on their
13217 publication settings. Implements ticket 18329. For more fine-
13218 grained control of how a bridge is distributed, upgrade to 0.3.2.x
13221 o Minor features (geoip):
13222 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13226 Changes in version 0.3.2.5-alpha - 2017-11-22
13227 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
13228 fixes several stability and reliability bugs, including a fix for
13229 intermittent bootstrapping failures that some people have been seeing
13230 since the 0.3.0.x series.
13232 Please test this alpha out -- many of these fixes will soon be
13233 backported to stable Tor versions if no additional bugs are found
13236 o Major bugfixes (bootstrapping):
13237 - Fetch descriptors aggressively whenever we lack enough to build
13238 circuits, regardless of how many descriptors we are missing.
13239 Previously, we would delay launching the fetch when we had fewer
13240 than 15 missing descriptors, even if some of those descriptors
13241 were blocking circuits from building. Fixes bug 23985; bugfix on
13242 0.1.1.11-alpha. The effects of this bug became worse in
13243 0.3.0.3-alpha, when we began treating missing descriptors from our
13244 primary guards as a reason to delay circuits.
13245 - Don't try fetching microdescriptors from relays that have failed
13246 to deliver them in the past. Fixes bug 23817; bugfix
13249 o Minor features (directory authority):
13250 - Make the "Exit" flag assignment only depend on whether the exit
13251 policy allows connections to ports 80 and 443. Previously relays
13252 would get the Exit flag if they allowed connections to one of
13253 these ports and also port 6667. Resolves ticket 23637.
13255 o Minor features (geoip):
13256 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
13259 o Minor features (linux seccomp2 sandbox):
13260 - Update the sandbox rules so that they should now work correctly
13261 with Glibc 2.26. Closes ticket 24315.
13263 o Minor features (logging):
13264 - Downgrade a pair of log messages that could occur when an exit's
13265 resolver gave us an unusual (but not forbidden) response. Closes
13267 - Improve the message we log when re-enabling circuit build timeouts
13268 after having received a consensus. Closes ticket 20963.
13270 o Minor bugfixes (compilation):
13271 - Fix a memory leak warning in one of the libevent-related
13272 configuration tests that could occur when manually specifying
13273 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
13274 Found and patched by Alex Xu.
13275 - When detecting OpenSSL on Windows from our configure script, make
13276 sure to try linking with the ws2_32 library. Fixes bug 23783;
13277 bugfix on 0.3.2.2-alpha.
13279 o Minor bugfixes (control port, linux seccomp2 sandbox):
13280 - Avoid a crash when attempting to use the seccomp2 sandbox together
13281 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
13284 o Minor bugfixes (control port, onion services):
13285 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
13286 HS_DESC event when a service is not able to upload a descriptor.
13287 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
13289 o Minor bugfixes (directory cache):
13290 - Recover better from empty or corrupt files in the consensus cache
13291 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
13292 - When a consensus diff calculation is only partially successful,
13293 only record the successful parts as having succeeded. Partial
13294 success can happen if (for example) one compression method fails
13295 but the others succeed. Previously we misrecorded all the
13296 calculations as having succeeded, which would later cause a
13297 nonfatal assertion failure. Fixes bug 24086; bugfix
13300 o Minor bugfixes (logging):
13301 - Only log once if we notice that KIST support is gone. Fixes bug
13302 24158; bugfix on 0.3.2.1-alpha.
13303 - Suppress a log notice when relay descriptors arrive. We already
13304 have a bootstrap progress for this so no need to log notice
13305 everytime tor receives relay descriptors. Microdescriptors behave
13306 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
13308 o Minor bugfixes (network layer):
13309 - When closing a connection via close_connection_immediately(), we
13310 mark it as "not blocked on bandwidth", to prevent later calls from
13311 trying to unblock it, and give it permission to read. This fixes a
13312 backtrace warning that can happen on relays under various
13313 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
13315 o Minor bugfixes (onion services):
13316 - The introduction circuit was being timed out too quickly while
13317 waiting for the rendezvous circuit to complete. Keep the intro
13318 circuit around longer instead of timing out and reopening new ones
13319 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
13320 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
13321 so it matches dir-spec.txt. Fixes bug 24262; bugfix
13323 - Silence a warning about failed v3 onion descriptor uploads that
13324 can happen naturally under certain edge cases. Fixes part of bug
13325 23662; bugfix on 0.3.2.1-alpha.
13327 o Minor bugfixes (tests):
13328 - Fix a memory leak in one of the bridge-distribution test cases.
13329 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13330 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13331 to correctly handle cases where a caller gives it an RSA key of
13332 under 160 bits. (This is not actually a bug in Tor itself, but
13333 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13334 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13337 - Add notes in man page regarding OS support for the various
13338 scheduler types. Attempt to use less jargon in the scheduler
13339 section. Closes ticket 24254.
13342 Changes in version 0.3.2.4-alpha - 2017-11-08
13343 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13344 It fixes several stability and reliability bugs, especially including
13345 a major reliability issue that has been plaguing fast exit relays in
13348 o Major bugfixes (exit relays, DNS):
13349 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13350 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13351 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13352 identifying and finding a workaround to this bug and to Moritz,
13353 Arthur Edelstein, and Roger for helping to track it down and
13356 o Major bugfixes (scheduler, channel):
13357 - Stop processing scheduled channels if they closed while flushing
13358 cells. This can happen if the write on the connection fails
13359 leading to the channel being closed while in the scheduler loop.
13360 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
13362 o Minor features (logging, scheduler):
13363 - Introduce a SCHED_BUG() function to log extra information about
13364 the scheduler state if we ever catch a bug in the scheduler.
13365 Closes ticket 23753.
13367 o Minor features (removed deprecations):
13368 - The ClientDNSRejectInternalAddresses flag can once again be set in
13369 non-testing Tor networks, so long as they do not use the default
13370 directory authorities. This change also removes the deprecation of
13371 this flag from 0.2.9.2-alpha. Closes ticket 21031.
13373 o Minor features (testing):
13374 - Our fuzzing tests now test the encrypted portions of v3 onion
13375 service descriptors. Implements more of 21509.
13377 o Minor bugfixes (directory client):
13378 - On failure to download directory information, delay retry attempts
13379 by a random amount based on the "decorrelated jitter" algorithm.
13380 Our previous delay algorithm tended to produce extra-long delays
13381 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
13383 o Minor bugfixes (IPv6, v3 single onion services):
13384 - Remove buggy code for IPv6-only v3 single onion services, and
13385 reject attempts to configure them. This release supports IPv4,
13386 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
13387 stack v3 single onion services. Fixes bug 23820; bugfix
13390 o Minor bugfixes (logging, relay):
13391 - Give only a protocol warning when the ed25519 key is not
13392 consistent between the descriptor and microdescriptor of a relay.
13393 This can happen, for instance, if the relay has been flagged
13394 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
13396 o Minor bugfixes (manpage, onion service):
13397 - Document that the HiddenServiceNumIntroductionPoints option is
13398 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
13399 bugfix on 0.3.2.1-alpha.
13401 o Minor bugfixes (memory leaks):
13402 - Fix a minor memory leak at exit in the KIST scheduler. This bug
13403 should have no user-visible impact. Fixes bug 23774; bugfix
13405 - Fix a memory leak when decrypting a badly formatted v3 onion
13406 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
13407 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
13409 o Minor bugfixes (onion services):
13410 - Cache some needed onion service client information instead of
13411 constantly computing it over and over again. Fixes bug 23623;
13412 bugfix on 0.3.2.1-alpha.
13413 - Properly retry HSv3 descriptor fetches when missing required
13414 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
13416 o Minor bugfixes (path selection):
13417 - When selecting relays by bandwidth, avoid a rounding error that
13418 could sometimes cause load to be imbalanced incorrectly.
13419 Previously, we would always round upwards; now, we round towards
13420 the nearest integer. This had the biggest effect when a relay's
13421 weight adjustments should have given it weight 0, but it got
13422 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
13423 - When calculating the fraction of nodes that have descriptors, and
13424 all nodes in the network have zero bandwidths, count the number of
13425 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
13426 - Actually log the total bandwidth in compute_weighted_bandwidths().
13427 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
13429 o Minor bugfixes (relay, crash):
13430 - Avoid a crash when transitioning from client mode to bridge mode.
13431 Previously, we would launch the worker threads whenever our
13432 "public server" mode changed, but not when our "server" mode
13433 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13435 o Minor bugfixes (testing):
13436 - Fix a spurious fuzzing-only use of an uninitialized value. Found
13437 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
13438 - Test that IPv6-only clients can use microdescriptors when running
13439 "make test-network-all". Requires chutney master 61c28b9 or later.
13440 Closes ticket 24109.
13443 Changes in version 0.3.2.3-alpha - 2017-10-27
13444 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
13445 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
13446 directory authority, Bastet.
13448 o Directory authority changes:
13449 - Add "Bastet" as a ninth directory authority to the default list.
13450 Closes ticket 23910.
13451 - The directory authority "Longclaw" has changed its IP address.
13452 Closes ticket 23592.
13454 o Minor features (bridge):
13455 - Bridge relays can now set the BridgeDistribution config option to
13456 add a "bridge-distribution-request" line to their bridge
13457 descriptor, which tells BridgeDB how they'd like their bridge
13458 address to be given out. (Note that as of Oct 2017, BridgeDB does
13459 not yet implement this feature.) As a side benefit, this feature
13460 provides a way to distinguish bridge descriptors from non-bridge
13461 descriptors. Implements tickets 18329.
13463 o Minor features (client, entry guards):
13464 - Improve log messages when missing descriptors for primary guards.
13465 Resolves ticket 23670.
13467 o Minor features (geoip):
13468 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13471 o Minor bugfixes (bridge):
13472 - Overwrite the bridge address earlier in the process of retrieving
13473 its descriptor, to make sure we reach it on the configured
13474 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
13476 o Minor bugfixes (documentation):
13477 - Document better how to read gcov, and what our gcov postprocessing
13478 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
13480 o Minor bugfixes (entry guards):
13481 - Tor now updates its guard state when it reads a consensus
13482 regardless of whether it's missing descriptors. That makes tor use
13483 its primary guards to fetch descriptors in some edge cases where
13484 it would previously have used fallback directories. Fixes bug
13485 23862; bugfix on 0.3.0.1-alpha.
13487 o Minor bugfixes (hidden service client):
13488 - When handling multiple SOCKS request for the same .onion address,
13489 only fetch the service descriptor once.
13490 - When a descriptor fetch fails with a non-recoverable error, close
13491 all pending SOCKS requests for that .onion. Fixes bug 23653;
13492 bugfix on 0.3.2.1-alpha.
13494 o Minor bugfixes (hidden service):
13495 - Always regenerate missing hidden service public key files. Prior
13496 to this, if the public key was deleted from disk, it wouldn't get
13497 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
13499 - Make sure that we have a usable ed25519 key when the intro point
13500 relay supports ed25519 link authentication. Fixes bug 24002;
13501 bugfix on 0.3.2.1-alpha.
13503 o Minor bugfixes (hidden service, v2):
13504 - When reloading configured hidden services, copy all information
13505 from the old service object. Previously, some data was omitted,
13506 causing delays in descriptor upload, and other bugs. Fixes bug
13507 23790; bugfix on 0.2.1.9-alpha.
13509 o Minor bugfixes (memory safety, defensive programming):
13510 - Clear the target address when node_get_prim_orport() returns
13511 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13513 o Minor bugfixes (relay):
13514 - Avoid a BUG warning when receiving a dubious CREATE cell while an
13515 option transition is in progress. Fixes bug 23952; bugfix
13518 o Minor bugfixes (testing):
13519 - Adjust the GitLab CI configuration to more closely match that of
13520 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
13521 - Prevent scripts/test/coverage from attempting to move gcov output
13522 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
13523 - When running unit tests as root, skip a test that would fail
13524 because it expects a permissions error. This affects some
13525 continuous integration setups. Fixes bug 23758; bugfix
13527 - Stop unconditionally mirroring the tor repository in GitLab CI.
13528 This prevented developers from enabling GitLab CI on master. Fixes
13529 bug 23755; bugfix on 0.3.2.2-alpha.
13530 - Fix the hidden service v3 descriptor decoding fuzzing to use the
13531 latest decoding API correctly. Fixes bug 21509; bugfix
13534 o Minor bugfixes (warnings):
13535 - When we get an HTTP request on a SOCKS port, tell the user about
13536 the new HTTPTunnelPort option. Previously, we would give a "Tor is
13537 not an HTTP Proxy" message, which stopped being true when
13538 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
13542 Changes in version 0.2.5.15 - 2017-10-25
13543 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
13544 series. It also adds a new directory authority, Bastet.
13546 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13547 2018. If you need a release with long-term support, please upgrade to
13548 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13550 o Directory authority changes:
13551 - Add "Bastet" as a ninth directory authority to the default list.
13552 Closes ticket 23910.
13553 - The directory authority "Longclaw" has changed its IP address.
13554 Closes ticket 23592.
13556 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13557 - Avoid an assertion failure bug affecting our implementation of
13558 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13559 handling of "0xx" differs from what we had expected. Fixes bug
13560 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13562 o Minor features (geoip):
13563 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13566 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13567 - Fix a memset() off the end of an array when packing cells. This
13568 bug should be harmless in practice, since the corrupted bytes are
13569 still in the same structure, and are always padding bytes,
13570 ignored, or immediately overwritten, depending on compiler
13571 behavior. Nevertheless, because the memset()'s purpose is to make
13572 sure that any other cell-handling bugs can't expose bytes to the
13573 network, we need to fix it. Fixes bug 22737; bugfix on
13574 0.2.4.11-alpha. Fixes CID 1401591.
13576 o Build features (backport from 0.3.1.5-alpha):
13577 - Tor's repository now includes a Travis Continuous Integration (CI)
13578 configuration file (.travis.yml). This is meant to help new
13579 developers and contributors who fork Tor to a Github repository be
13580 better able to test their changes, and understand what we expect
13581 to pass. To use this new build feature, you must fork Tor to your
13582 Github account, then go into the "Integrations" menu in the
13583 repository settings for your fork and enable Travis, then push
13584 your changes. Closes ticket 22636.
13587 Changes in version 0.2.8.16 - 2017-10-25
13588 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
13589 series, including a bugfix for a crash issue that had affected relays
13590 under memory pressure. It also adds a new directory authority, Bastet.
13592 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13593 2018. If you need a release with long-term support, please stick with
13594 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13596 o Directory authority changes:
13597 - Add "Bastet" as a ninth directory authority to the default list.
13598 Closes ticket 23910.
13599 - The directory authority "Longclaw" has changed its IP address.
13600 Closes ticket 23592.
13602 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13603 - Fix a timing-based assertion failure that could occur when the
13604 circuit out-of-memory handler freed a connection's output buffer.
13605 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13607 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13608 - Remove longclaw's IPv6 address, as it will soon change. Authority
13609 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13610 3/8 directory authorities with IPv6 addresses, but there are also
13611 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13613 o Minor features (geoip):
13614 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13618 Changes in version 0.2.9.13 - 2017-10-25
13619 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
13620 series, including a bugfix for a crash issue that had affected relays
13621 under memory pressure. It also adds a new directory authority, Bastet.
13623 o Directory authority changes:
13624 - Add "Bastet" as a ninth directory authority to the default list.
13625 Closes ticket 23910.
13626 - The directory authority "Longclaw" has changed its IP address.
13627 Closes ticket 23592.
13629 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13630 - Fix a timing-based assertion failure that could occur when the
13631 circuit out-of-memory handler freed a connection's output buffer.
13632 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13634 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13635 - Remove longclaw's IPv6 address, as it will soon change. Authority
13636 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13637 3/8 directory authorities with IPv6 addresses, but there are also
13638 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13640 o Minor features (geoip):
13641 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13644 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13645 - When a directory authority rejects a descriptor or extrainfo with
13646 a given digest, mark that digest as undownloadable, so that we do
13647 not attempt to download it again over and over. We previously
13648 tried to avoid downloading such descriptors by other means, but we
13649 didn't notice if we accidentally downloaded one anyway. This
13650 behavior became problematic in 0.2.7.2-alpha, when authorities
13651 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13654 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13655 - Clear the address when node_get_prim_orport() returns early.
13656 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13658 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13659 - When running as a Windows service, set the ID of the main thread
13660 correctly. Failure to do so made us fail to send log messages to
13661 the controller in 0.2.1.16-rc, slowed down controller event
13662 delivery in 0.2.7.3-rc and later, and crash with an assertion
13663 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13664 Patch and diagnosis from "Vort".
13667 Changes in version 0.3.0.12 - 2017-10-25
13668 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
13669 series, including a bugfix for a crash issue that had affected relays
13670 under memory pressure. It also adds a new directory authority, Bastet.
13672 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13673 2018. If you need a release with long-term support, please stick with
13674 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13676 o Directory authority changes:
13677 - Add "Bastet" as a ninth directory authority to the default list.
13678 Closes ticket 23910.
13679 - The directory authority "Longclaw" has changed its IP address.
13680 Closes ticket 23592.
13682 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13683 - Fix a timing-based assertion failure that could occur when the
13684 circuit out-of-memory handler freed a connection's output buffer.
13685 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13687 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13688 - Remove longclaw's IPv6 address, as it will soon change. Authority
13689 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13690 3/8 directory authorities with IPv6 addresses, but there are also
13691 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13693 o Minor features (geoip):
13694 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13697 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13698 - When a directory authority rejects a descriptor or extrainfo with
13699 a given digest, mark that digest as undownloadable, so that we do
13700 not attempt to download it again over and over. We previously
13701 tried to avoid downloading such descriptors by other means, but we
13702 didn't notice if we accidentally downloaded one anyway. This
13703 behavior became problematic in 0.2.7.2-alpha, when authorities
13704 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13707 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13708 - Avoid a possible double close of a circuit by the intro point on
13709 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13710 bugfix on 0.3.0.1-alpha.
13712 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13713 - Clear the address when node_get_prim_orport() returns early.
13714 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13716 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13717 - When running as a Windows service, set the ID of the main thread
13718 correctly. Failure to do so made us fail to send log messages to
13719 the controller in 0.2.1.16-rc, slowed down controller event
13720 delivery in 0.2.7.3-rc and later, and crash with an assertion
13721 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13722 Patch and diagnosis from "Vort".
13725 Changes in version 0.3.1.8 - 2017-10-25
13726 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
13727 It includes several bugfixes, including a bugfix for a crash issue
13728 that had affected relays under memory pressure. It also adds
13729 a new directory authority, Bastet.
13731 o Directory authority changes:
13732 - Add "Bastet" as a ninth directory authority to the default list.
13733 Closes ticket 23910.
13734 - The directory authority "Longclaw" has changed its IP address.
13735 Closes ticket 23592.
13737 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13738 - Fix a timing-based assertion failure that could occur when the
13739 circuit out-of-memory handler freed a connection's output buffer.
13740 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13742 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13743 - Remove longclaw's IPv6 address, as it will soon change. Authority
13744 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13745 3/8 directory authorities with IPv6 addresses, but there are also
13746 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13748 o Minor features (geoip):
13749 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13752 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
13753 - Fix a compilation warning when building with zstd support on
13754 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13755 and fixed by Andreas Stieger.
13757 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
13758 - Handle a pathological case when decompressing Zstandard data when
13759 the output buffer size is zero. Fixes bug 23551; bugfix
13762 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
13763 - Remove the length limit on HTTP status lines that authorities can
13764 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
13766 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13767 - Avoid a possible double close of a circuit by the intro point on
13768 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13769 bugfix on 0.3.0.1-alpha.
13771 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13772 - Clear the address when node_get_prim_orport() returns early.
13773 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13775 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
13776 - Fix additional channelpadding unit test failures by using mocked
13777 time instead of actual time for all tests. Fixes bug 23608; bugfix
13781 Changes in version 0.3.2.2-alpha - 2017-09-29
13782 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
13783 release fixes several minor bugs in the new scheduler and next-
13784 generation onion services; both features were newly added in the 0.3.2
13785 series. Other fixes in this alpha include several fixes for non-fatal
13786 tracebacks which would appear in logs.
13788 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
13789 alpha does not contain any substantial new features. Minor features
13790 include better testing and logging.
13792 The following comprises the complete list of changes included
13795 o Major bugfixes (relay, crash, assertion failure):
13796 - Fix a timing-based assertion failure that could occur when the
13797 circuit out-of-memory handler freed a connection's output buffer.
13798 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13800 o Major bugfixes (scheduler):
13801 - If a channel is put into the scheduler's pending list, then it
13802 starts closing, and then if the scheduler runs before it finishes
13803 closing, the scheduler will get stuck trying to flush its cells
13804 while the lower layers refuse to cooperate. Fix that race
13805 condition by giving the scheduler an escape method. Fixes bug
13806 23676; bugfix on 0.3.2.1-alpha.
13808 o Minor features (build, compilation):
13809 - The "check-changes" feature is now part of the "make check" tests;
13810 we'll use it to try to prevent misformed changes files from
13811 accumulating. Closes ticket 23564.
13812 - Tor builds should now fail if there are any mismatches between the
13813 C type representing a configuration variable and the C type the
13814 data-driven parser uses to store a value there. Previously, we
13815 needed to check these by hand, which sometimes led to mistakes.
13816 Closes ticket 23643.
13818 o Minor features (directory authorities):
13819 - Remove longclaw's IPv6 address, as it will soon change. Authority
13820 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13821 3/8 directory authorities with IPv6 addresses, but there are also
13822 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13824 o Minor features (hidden service, circuit, logging):
13825 - Improve logging of many callsite in the circuit subsystem to print
13826 the circuit identifier(s).
13827 - Log when we cleanup an intro point from a service so we know when
13828 and for what reason it happened. Closes ticket 23604.
13830 o Minor features (logging):
13831 - Log more circuit information whenever we are about to try to
13832 package a relay cell on a circuit with a nonexistent n_chan.
13833 Attempt to diagnose ticket 8185.
13834 - Improve info-level log identification of particular circuits, to
13835 help with debugging. Closes ticket 23645.
13837 o Minor features (relay):
13838 - When choosing which circuits can be expired as unused, consider
13839 circuits from clients even if those clients used regular CREATE
13840 cells to make them; and do not consider circuits from relays even
13841 if they were made with CREATE_FAST. Part of ticket 22805.
13843 o Minor features (robustness):
13844 - Change several fatal assertions when flushing buffers into non-
13845 fatal assertions, to prevent any recurrence of 23690.
13847 o Minor features (spec conformance, bridge, diagnostic):
13848 - When handling the USERADDR command on an ExtOrPort, warn when the
13849 transports provides a USERADDR with no port. In a future version,
13850 USERADDR commands of this format may be rejected. Detects problems
13851 related to ticket 23080.
13853 o Minor features (testing):
13854 - Add a unit test to make sure that our own generated platform
13855 string will be accepted by directory authorities. Closes
13858 o Minor bugfixes (bootstrapping):
13859 - When warning about state file clock skew, report the correct
13860 direction for the detected skew. Fixes bug 23606; bugfix
13862 - Avoid an assertion failure when logging a state file clock skew
13863 very early in bootstrapping. Fixes bug 23607; bugfix
13866 o Minor bugfixes (build, compilation):
13867 - Fix a compilation warning when building with zstd support on
13868 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13869 and fixed by Andreas Stieger.
13870 - When searching for OpenSSL, don't accept any OpenSSL library that
13871 lacks TLSv1_1_method(): Tor doesn't build with those versions.
13872 Additionally, look in /usr/local/opt/openssl, if it's present.
13873 These changes together repair the default build on OSX systems
13874 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
13876 o Minor bugfixes (compression):
13877 - Handle a pathological case when decompressing Zstandard data when
13878 the output buffer size is zero. Fixes bug 23551; bugfix
13881 o Minor bugfixes (documentation):
13882 - Fix manpage to not refer to the obsolete (and misspelled)
13883 UseEntryGuardsAsDirectoryGuards parameter in the description of
13884 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
13886 o Minor bugfixes (hidden service v3):
13887 - Don't log an assertion failure when we can't find the right
13888 information to extend to an introduction point. In rare cases,
13889 this could happen, causing a warning, even though tor would
13890 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
13891 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
13892 much bigger so the rendezvous point can't distinguish which hidden
13893 service protocol is being used. Fixes bug 23420; bugfix
13896 o Minor bugfixes (hidden service, relay):
13897 - Avoid a possible double close of a circuit by the intro point on
13898 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13899 bugfix on 0.3.0.1-alpha.
13901 o Minor bugfixes (logging, relay shutdown, annoyance):
13902 - When a circuit is marked for close, do not attempt to package any
13903 cells for channels on that circuit. Previously, we would detect
13904 this condition lower in the call stack, when we noticed that the
13905 circuit had no attached channel, and log an annoying message.
13906 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13908 o Minor bugfixes (scheduler):
13909 - When switching schedulers due to a consensus change, we didn't
13910 give the new scheduler a chance to react to the consensus. Fix
13911 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
13912 - Make the KISTSchedRunInterval option a non negative value. With
13913 this, the way to disable KIST through the consensus is to set it
13914 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
13915 - Only notice log the selected scheduler when we switch scheduler
13916 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
13917 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
13918 by a different tv_usec data type. Fixes bug 23575; bugfix
13920 - Make a hard exit if tor is unable to pick a scheduler which can
13921 happen if the user specifies a scheduler type that is not
13922 supported and not other types in Schedulers. Fixes bug 23581;
13923 bugfix on 0.3.2.1-alpha.
13924 - Properly initialize the scheduler last run time counter so it is
13925 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13927 o Minor bugfixes (testing):
13928 - Capture and detect several "Result does not fit" warnings in unit
13929 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
13931 - Fix additional channelpadding unit test failures by using mocked
13932 time instead of actual time for all tests. Fixes bug 23608; bugfix
13934 - The removal of some old scheduler options caused some tests to
13935 fail on BSD systems. Assume current behavior is correct and make
13936 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
13938 o Code simplification and refactoring:
13939 - Remove various ways of testing circuits and connections for
13940 "clientness"; instead, favor channel_is_client(). Part of
13943 o Deprecated features:
13944 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
13945 now deprecated; they do not apply to relays, and they have had no
13946 effect on clients since 0.2.8.x. Closes ticket 19704.
13949 - HiddenServiceVersion man page entry wasn't mentioning the now
13950 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
13951 - Clarify that the Address option is entirely about setting an
13952 advertised IPv4 address. Closes ticket 18891.
13953 - Clarify the manpage's use of the term "address" to clarify what
13954 kind of address is intended. Closes ticket 21405.
13955 - Document that onion service subdomains are allowed, and ignored.
13956 Closes ticket 18736.
13959 Changes in version 0.3.2.1-alpha - 2017-09-18
13960 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
13961 includes support for our next-generation ("v3") onion service
13962 protocol, and adds a new circuit scheduler for more responsive
13963 forwarding decisions from relays. There are also numerous other small
13964 features and bugfixes here.
13966 Below are the changes since Tor 0.3.1.7.
13968 o Major feature (scheduler, channel):
13969 - Tor now uses new schedulers to decide which circuits should
13970 deliver cells first, in order to improve congestion at relays. The
13971 first type is called "KIST" ("Kernel Informed Socket Transport"),
13972 and is only available on Linux-like systems: it uses feedback from
13973 the kernel to prevent the kernel's TCP buffers from growing too
13974 full. The second new scheduler type is called "KISTLite": it
13975 behaves the same as KIST, but runs on systems without kernel
13976 support for inspecting TCP implementation details. The old
13977 scheduler is still available, under the name "Vanilla". To change
13978 the default scheduler preference order, use the new "Schedulers"
13979 option. (The default preference order is "KIST,KISTLite,Vanilla".)
13981 Matt Traudt implemented KIST, based on research by Rob Jansen,
13982 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
13983 more information, see the design paper at
13984 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
13985 followup implementation paper at https://arxiv.org/abs/1709.01044.
13986 Closes ticket 12541.
13988 o Major features (next-generation onion services):
13989 - Tor now supports the next-generation onion services protocol for
13990 clients and services! As part of this release, the core of
13991 proposal 224 has been implemented and is available for
13992 experimentation and testing by our users. This newer version of
13993 onion services ("v3") features many improvements over the legacy
13996 a) Better crypto (replaced SHA1/DH/RSA1024
13997 with SHA3/ed25519/curve25519)
13999 b) Improved directory protocol, leaking much less information to
14002 c) Improved directory protocol, with smaller surface for
14005 d) Better onion address security against impersonation.
14007 e) More extensible introduction/rendezvous protocol.
14009 f) A cleaner and more modular codebase.
14011 You can identify a next-generation onion address by its length:
14012 they are 56 characters long, as in
14013 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
14015 In the future, we will release more options and features for v3
14016 onion services, but we first need a testing period, so that the
14017 current codebase matures and becomes more robust. Planned features
14018 include: offline keys, advanced client authorization, improved
14019 guard algorithms, and statistics. For full details, see
14022 Legacy ("v2") onion services will still work for the foreseeable
14023 future, and will remain the default until this new codebase gets
14024 tested and hardened. Service operators who want to experiment with
14025 the new system can use the 'HiddenServiceVersion 3' torrc
14026 directive along with the regular onion service configuration
14027 options. We will publish a blog post about this new feature
14030 o Major bugfixes (usability, control port):
14031 - Report trusted clock skew indications as bootstrap errors, so
14032 controllers can more easily alert users when their clocks are
14033 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
14035 o Minor features (bug detection):
14036 - Log a warning message with a stack trace for any attempt to call
14037 get_options() during option validation. This pattern has caused
14038 subtle bugs in the past. Closes ticket 22281.
14040 o Minor features (client):
14041 - You can now use Tor as a tunneled HTTP proxy: use the new
14042 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
14043 requests. Closes ticket 22407.
14044 - Add an extra check to make sure that we always use the newer guard
14045 selection code for picking our guards. Closes ticket 22779.
14046 - When downloading (micro)descriptors, don't split the list into
14047 multiple requests unless we want at least 32 descriptors.
14048 Previously, we split at 4, not 32, which led to significant
14049 overhead in HTTP request size and degradation in compression
14050 performance. Closes ticket 23220.
14052 o Minor features (command line):
14053 - Add a new commandline option, --key-expiration, which prints when
14054 the current signing key is going to expire. Implements ticket
14055 17639; patch by Isis Lovecruft.
14057 o Minor features (control port):
14058 - If an application tries to use the control port as an HTTP proxy,
14059 respond with a meaningful "This is the Tor control port" message,
14060 and log the event. Closes ticket 1667. Patch from Ravi
14062 - Provide better error message for GETINFO desc/(id|name) when not
14063 fetching router descriptors. Closes ticket 5847. Patch by
14065 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
14066 whether Tor will try to download router descriptors and
14067 microdescriptors respectively. Closes ticket 22684.
14068 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
14069 so controllers can tell whether the geoip databases are loaded.
14070 Closes ticket 23237.
14071 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
14072 events. Closes ticket 19254. Patch by "DonnchaC".
14074 o Minor features (development support):
14075 - Developers can now generate a call-graph for Tor using the
14076 "calltool" python program, which post-processes object dumps. It
14077 should work okay on many Linux and OSX platforms, and might work
14078 elsewhere too. To run it, install calltool from
14079 https://gitweb.torproject.org/user/nickm/calltool.git and run
14080 "make callgraph". Closes ticket 19307.
14082 o Minor features (ed25519):
14083 - Add validation function to checks for torsion components in
14084 ed25519 public keys, used by prop224 client-side code. Closes
14085 ticket 22006. Math help by Ian Goldberg.
14087 o Minor features (exit relay, DNS):
14088 - Improve the clarity and safety of the log message from evdns when
14089 receiving an apparently spoofed DNS reply. Closes ticket 3056.
14091 o Minor features (integration, hardening):
14092 - Add a new NoExec option to prevent Tor from running other
14093 programs. When this option is set to 1, Tor will never try to run
14094 another program, regardless of the settings of
14095 PortForwardingHelper, ClientTransportPlugin, or
14096 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
14097 without restarting Tor. Closes ticket 22976.
14099 o Minor features (logging):
14100 - Improve the warning message for specifying a relay by nickname.
14101 The previous message implied that nickname registration was still
14102 part of the Tor network design, which it isn't. Closes
14104 - If the sandbox filter fails to load, suggest to the user that
14105 their kernel might not support seccomp2. Closes ticket 23090.
14107 o Minor features (portability):
14108 - Check at configure time whether uint8_t is the same type as
14109 unsigned char. Lots of existing code already makes this
14110 assumption, and there could be strict aliasing issues if the
14111 assumption is violated. Closes ticket 22410.
14113 o Minor features (relay, configuration):
14114 - Reject attempts to use relative file paths when RunAsDaemon is
14115 set. Previously, Tor would accept these, but the directory-
14116 changing step of RunAsDaemon would give strange and/or confusing
14117 results. Closes ticket 22731.
14119 o Minor features (startup, safety):
14120 - When configured to write a PID file, Tor now exits if it is unable
14121 to do so. Previously, it would warn and continue. Closes
14124 o Minor features (static analysis):
14125 - The BUG() macro has been changed slightly so that Coverity no
14126 longer complains about dead code if the bug is impossible. Closes
14129 o Minor features (testing):
14130 - The default chutney network tests now include tests for the v3
14131 hidden service design. Make sure you have the latest version of
14132 chutney if you want to run these. Closes ticket 22437.
14133 - Add a unit test to verify that we can parse a hardcoded v2 hidden
14134 service descriptor. Closes ticket 15554.
14136 o Minor bugfixes (certificate handling):
14137 - Fix a time handling bug in Tor certificates set to expire after
14138 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
14139 Coverity as CID 1415728.
14141 o Minor bugfixes (client, usability):
14142 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
14143 SOCKS4a requests that contain IP address strings, even when
14144 SafeSocks in enabled, as this prevents user from connecting to
14145 known IP addresses without relying on DNS for resolving. SafeSocks
14146 still rejects SOCKS connections that connect to IP addresses when
14147 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
14148 bugfix on Tor 0.2.6.2-alpha.
14150 o Minor bugfixes (code correctness):
14151 - Call htons() in extend_cell_format() for encoding a 16-bit value.
14152 Previously we used ntohs(), which happens to behave the same on
14153 all the platforms we support, but which isn't really correct.
14154 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
14155 - For defense-in-depth, make the controller's write_escaped_data()
14156 function robust to extremely long inputs. Fixes bug 19281; bugfix
14157 on 0.1.1.1-alpha. Reported by Guido Vranken.
14159 o Minor bugfixes (compilation):
14160 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
14161 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
14163 o Minor bugfixes (consensus expiry):
14164 - Check for adequate directory information correctly. Previously, Tor
14165 would reconsider whether it had sufficient directory information
14166 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
14168 o Minor bugfixes (directory protocol):
14169 - Directory servers now include a "Date:" http header for response
14170 codes other than 200. Clients starting with a skewed clock and a
14171 recent consensus were getting "304 Not modified" responses from
14172 directory authorities, so without the Date header, the client
14173 would never hear about a wrong clock. Fixes bug 23499; bugfix
14175 - Make clients wait for 6 seconds before trying to download a
14176 consensus from an authority. Fixes bug 17750; bugfix
14179 o Minor bugfixes (DoS-resistance):
14180 - If future code asks if there are any running bridges, without
14181 checking if bridges are enabled, log a BUG warning rather than
14182 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
14184 o Minor bugfixes (format strictness):
14185 - Restrict several data formats to decimal. Previously, the
14186 BuildTimeHistogram entries in the state file, the "bw=" entries in
14187 the bandwidth authority file, and the process IDs passed to the
14188 __OwningControllerProcess option could all be specified in hex or
14189 octal as well as in decimal. This was not an intentional feature.
14190 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
14193 o Minor bugfixes (heartbeat):
14194 - If we fail to write a heartbeat message, schedule a retry for the
14195 minimum heartbeat interval number of seconds in the future. Fixes
14196 bug 19476; bugfix on 0.2.3.1-alpha.
14198 o Minor bugfixes (linux seccomp2 sandbox, logging):
14199 - Fix some messages on unexpected errors from the seccomp2 library.
14200 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
14202 o Minor bugfixes (logging):
14203 - Remove duplicate log messages regarding opening non-local
14204 SocksPorts upon parsing config and opening listeners at startup.
14205 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
14206 - Use a more comprehensible log message when telling the user
14207 they've excluded every running exit node. Fixes bug 7890; bugfix
14209 - When logging the number of descriptors we intend to download per
14210 directory request, do not log a number higher than then the number
14211 of descriptors we're fetching in total. Fixes bug 19648; bugfix
14213 - When warning about a directory owned by the wrong user, log the
14214 actual name of the user owning the directory. Previously, we'd log
14215 the name of the process owner twice. Fixes bug 23487; bugfix
14217 - The tor specification says hop counts are 1-based, so fix two log
14218 messages that mistakenly logged 0-based hop counts. Fixes bug
14219 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
14220 Credit to Xiaofan Li for reporting this issue.
14222 o Minor bugfixes (portability):
14223 - Stop using the PATH_MAX variable, which is not defined on GNU
14224 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
14226 o Minor bugfixes (relay):
14227 - When uploading our descriptor for the first time after startup,
14228 report the reason for uploading as "Tor just started" rather than
14229 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
14230 - Avoid unnecessary calls to directory_fetches_from_authorities() on
14231 relays, to prevent spurious address resolutions and descriptor
14232 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
14233 bugfix on in 0.2.8.1-alpha.
14235 o Minor bugfixes (tests):
14236 - Fix a broken unit test for the OutboundAddress option: the parsing
14237 function was never returning an error on failure. Fixes bug 23366;
14238 bugfix on 0.3.0.3-alpha.
14239 - Fix a signed-integer overflow in the unit tests for
14240 dir/download_status_random_backoff, which was untriggered until we
14241 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
14243 o Minor bugfixes (usability, control port):
14244 - Stop making an unnecessary routerlist check in NETINFO clock skew
14245 detection; this was preventing clients from reporting NETINFO clock
14246 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
14248 o Code simplification and refactoring:
14249 - Extract the code for handling newly-open channels into a separate
14250 function from the general code to handle channel state
14251 transitions. This change simplifies our callgraph, reducing the
14252 size of the largest strongly connected component by roughly a
14253 factor of two. Closes ticket 22608.
14254 - Remove dead code for largely unused statistics on the number of
14255 times we've attempted various public key operations. Fixes bug
14256 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
14257 - Remove several now-obsolete functions for asking about old
14258 variants directory authority status. Closes ticket 22311; patch
14260 - Remove some of the code that once supported "Named" and "Unnamed"
14261 routers. Authorities no longer vote for these flags. Closes
14263 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
14264 and old hidden services, to indicate that they aren't suitable for
14265 new protocols or formats. Closes ticket 23026.
14266 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
14267 22521. Patch from Neel Chauhan.
14268 - Split the enormous circuit_send_next_onion_skin() function into
14269 multiple subfunctions. Closes ticket 22804.
14270 - Split the portions of the buffer.c module that handle particular
14271 protocols into separate modules. Part of ticket 23149.
14272 - Use our test macros more consistently, to produce more useful
14273 error messages when our unit tests fail. Add coccinelle patches to
14274 allow us to re-check for test macro uses. Closes ticket 22497.
14276 o Deprecated features:
14277 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
14278 only applies to direct unencrypted HTTP connections to your
14279 directory server, which your Tor probably isn't using. Closes
14283 - Clarify in the manual that "Sandbox 1" is only supported on Linux
14284 kernels. Closes ticket 22677.
14285 - Document all values of PublishServerDescriptor in the manpage.
14286 Closes ticket 15645.
14287 - Improve the documentation for the directory port part of the
14288 DirAuthority line. Closes ticket 20152.
14289 - Restore documentation for the authorities' "approved-routers"
14290 file. Closes ticket 21148.
14292 o Removed features:
14293 - The AllowDotExit option has been removed as unsafe. It has been
14294 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
14295 - The ClientDNSRejectInternalAddresses flag can no longer be set on
14296 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
14297 Closes ticket 21031.
14298 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
14299 nobody was using it any longer. Closes ticket 22377.
14302 Changes in version 0.2.8.15 - 2017-09-18
14303 Tor 0.2.8.15 backports a collection of bugfixes from later
14306 Most significantly, it includes a fix for TROVE-2017-008, a
14307 security bug that affects hidden services running with the
14308 SafeLogging option disabled. For more information, see
14309 https://trac.torproject.org/projects/tor/ticket/23490
14311 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
14312 2018. We suggest that you upgrade to the latest stable release if
14313 possible. If you can't, we recommend that you upgrade at least to
14314 0.2.9, which will be supported until 2020.
14316 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14317 - Avoid an assertion failure bug affecting our implementation of
14318 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14319 handling of "0xx" differs from what we had expected. Fixes bug
14320 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14323 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14326 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14327 - Backport a fix for an "unused variable" warning that appeared
14328 in some versions of mingw. Fixes bug 22838; bugfix on
14331 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14332 - Fix a memset() off the end of an array when packing cells. This
14333 bug should be harmless in practice, since the corrupted bytes are
14334 still in the same structure, and are always padding bytes,
14335 ignored, or immediately overwritten, depending on compiler
14336 behavior. Nevertheless, because the memset()'s purpose is to make
14337 sure that any other cell-handling bugs can't expose bytes to the
14338 network, we need to fix it. Fixes bug 22737; bugfix on
14339 0.2.4.11-alpha. Fixes CID 1401591.
14341 o Build features (backport from 0.3.1.5-alpha):
14342 - Tor's repository now includes a Travis Continuous Integration (CI)
14343 configuration file (.travis.yml). This is meant to help new
14344 developers and contributors who fork Tor to a Github repository be
14345 better able to test their changes, and understand what we expect
14346 to pass. To use this new build feature, you must fork Tor to your
14347 Github account, then go into the "Integrations" menu in the
14348 repository settings for your fork and enable Travis, then push
14349 your changes. Closes ticket 22636.
14352 Changes in version 0.2.9.12 - 2017-09-18
14353 Tor 0.2.9.12 backports a collection of bugfixes from later
14356 Most significantly, it includes a fix for TROVE-2017-008, a
14357 security bug that affects hidden services running with the
14358 SafeLogging option disabled. For more information, see
14359 https://trac.torproject.org/projects/tor/ticket/23490
14361 o Major features (security, backport from 0.3.0.2-alpha):
14362 - Change the algorithm used to decide DNS TTLs on client and server
14363 side, to better resist DNS-based correlation attacks like the
14364 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
14365 Feamster. Now relays only return one of two possible DNS TTL
14366 values, and clients are willing to believe DNS TTL values up to 3
14367 hours long. Closes ticket 19769.
14369 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
14370 - Fix a rare crash when sending a begin cell on a circuit whose
14371 linked directory connection had already been closed. Fixes bug
14372 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14374 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
14375 - Fix a bug that prevented exit nodes from caching DNS records for
14376 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
14378 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14379 - Fix a typo that had prevented TPROXY-based transparent proxying
14380 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14381 Patch from "d4fq0fQAgoJ".
14383 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14384 - Avoid an assertion failure bug affecting our implementation of
14385 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14386 handling of "0xx" differs from what we had expected. Fixes bug
14387 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14389 o Minor features (code style, backport from 0.3.1.3-alpha):
14390 - Add "Falls through" comments to our codebase, in order to silence
14391 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14392 Stieger. Closes ticket 22446.
14394 o Minor features (geoip):
14395 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14398 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
14399 - Roll over monthly accounting at the configured hour and minute,
14400 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14401 Found by Andrey Karpov with PVS-Studio.
14403 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
14404 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14405 bugfix on 0.2.8.1-alpha.
14406 - Fix warnings when building with libscrypt and openssl scrypt support
14407 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14408 - When building with certain versions the mingw C header files, avoid
14409 float-conversion warnings when calling the C functions isfinite(),
14410 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
14412 o Minor bugfixes (compilation, backport from 0.3.1.7):
14413 - Avoid compiler warnings in the unit tests for running tor_sscanf()
14414 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14416 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14417 - Backport a fix for an "unused variable" warning that appeared
14418 in some versions of mingw. Fixes bug 22838; bugfix on
14421 o Minor bugfixes (controller, backport from 0.3.1.7):
14422 - Do not crash when receiving a HSPOST command with an empty body.
14423 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14424 - Do not crash when receiving a POSTDESCRIPTOR command with an
14425 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14427 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14428 - Avoid Coverity build warnings related to our BUG() macro. By
14429 default, Coverity treats BUG() as the Linux kernel does: an
14430 instant abort(). We need to override that so our BUG() macro
14431 doesn't prevent Coverity from analyzing functions that use it.
14432 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14434 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14435 - Fix a memset() off the end of an array when packing cells. This
14436 bug should be harmless in practice, since the corrupted bytes are
14437 still in the same structure, and are always padding bytes,
14438 ignored, or immediately overwritten, depending on compiler
14439 behavior. Nevertheless, because the memset()'s purpose is to make
14440 sure that any other cell-handling bugs can't expose bytes to the
14441 network, we need to fix it. Fixes bug 22737; bugfix on
14442 0.2.4.11-alpha. Fixes CID 1401591.
14444 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14445 - When setting the maximum number of connections allowed by the OS,
14446 always allow some extra file descriptors for other files. Fixes
14447 bug 22797; bugfix on 0.2.0.10-alpha.
14449 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14450 - Avoid a sandbox failure when trying to re-bind to a socket and
14451 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14453 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14454 - Permit the fchmod system call, to avoid crashing on startup when
14455 starting with the seccomp2 sandbox and an unexpected set of
14456 permissions on the data directory or its contents. Fixes bug
14457 22516; bugfix on 0.2.5.4-alpha.
14459 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
14460 - Avoid a double-marked-circuit warning that could happen when we
14461 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14464 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14465 - Reject version numbers with non-numeric prefixes (such as +, -, or
14466 whitespace). Disallowing whitespace prevents differential version
14467 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14468 and part of 21508; bugfix on 0.0.8pre1.
14470 o Build features (backport from 0.3.1.5-alpha):
14471 - Tor's repository now includes a Travis Continuous Integration (CI)
14472 configuration file (.travis.yml). This is meant to help new
14473 developers and contributors who fork Tor to a Github repository be
14474 better able to test their changes, and understand what we expect
14475 to pass. To use this new build feature, you must fork Tor to your
14476 Github account, then go into the "Integrations" menu in the
14477 repository settings for your fork and enable Travis, then push
14478 your changes. Closes ticket 22636.
14481 Changes in version 0.3.0.11 - 2017-09-18
14482 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
14485 Most significantly, it includes a fix for TROVE-2017-008, a
14486 security bug that affects hidden services running with the
14487 SafeLogging option disabled. For more information, see
14488 https://trac.torproject.org/projects/tor/ticket/23490
14490 o Minor features (code style, backport from 0.3.1.7):
14491 - Add "Falls through" comments to our codebase, in order to silence
14492 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14493 Stieger. Closes ticket 22446.
14496 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14499 o Minor bugfixes (compilation, backport from 0.3.1.7):
14500 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14501 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14503 o Minor bugfixes (controller, backport from 0.3.1.7):
14504 - Do not crash when receiving a HSPOST command with an empty body.
14505 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14506 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14507 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14509 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14510 - When setting the maximum number of connections allowed by the OS,
14511 always allow some extra file descriptors for other files. Fixes
14512 bug 22797; bugfix on 0.2.0.10-alpha.
14514 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
14515 - Remove a forgotten debugging message when an introduction point
14516 successfully establishes a hidden service prop224 circuit with
14518 - Change three other log_warn() for an introduction point to
14519 protocol warnings, because they can be failure from the network
14520 and are not relevant to the operator. Fixes bug 23078; bugfix on
14521 0.3.0.1-alpha and 0.3.0.2-alpha.
14524 Changes in version 0.3.1.7 - 2017-09-18
14525 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
14527 With the 0.3.1 series, Tor now serves and downloads directory
14528 information in more compact formats, to save on bandwidth overhead. It
14529 also contains a new padding system to resist netflow-based traffic
14530 analysis, and experimental support for building parts of Tor in Rust
14531 (though no parts of Tor are in Rust yet). There are also numerous
14532 small features, bugfixes on earlier release series, and groundwork for
14533 the hidden services revamp of 0.3.2.
14535 This release also includes a fix for TROVE-2017-008, a security bug
14536 that affects hidden services running with the SafeLogging option
14537 disabled. For more information, see
14538 https://trac.torproject.org/projects/tor/ticket/23490
14540 Per our stable release policy, we plan to support each stable release
14541 series for at least the next nine months, or for three months after
14542 the first stable release of the next series: whichever is longer. If
14543 you need a release with long-term support, we recommend that you stay
14544 with the 0.2.9 series.
14546 Below is a list of the changes since 0.3.1.6-rc. For a list of all
14547 changes since 0.3.0, see the ReleaseNotes file.
14549 o Major bugfixes (security, hidden services, loggging):
14550 - Fix a bug where we could log uninitialized stack when a certain
14551 hidden service error occurred while SafeLogging was disabled.
14552 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
14553 TROVE-2017-008 and CVE-2017-0380.
14555 o Minor features (defensive programming):
14556 - Create a pair of consensus parameters, nf_pad_tor2web and
14557 nf_pad_single_onion, to disable netflow padding in the consensus
14558 for non-anonymous connections in case the overhead is high. Closes
14561 o Minor features (diagnostic):
14562 - Add a stack trace to the bug warnings that can be logged when
14563 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
14564 attempt for bug 23105.
14566 o Minor features (geoip):
14567 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14570 o Minor bugfixes (compilation):
14571 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14572 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14574 o Minor bugfixes (controller):
14575 - Do not crash when receiving a HSPOST command with an empty body.
14576 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14577 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14578 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14580 o Minor bugfixes (relay):
14581 - Inform the geoip and rephist modules about all requests, even on
14582 relays that are only fetching microdescriptors. Fixes a bug
14583 related to 21585; bugfix on 0.3.0.1-alpha.
14585 o Minor bugfixes (unit tests):
14586 - Fix a channelpadding unit test failure on slow systems by using
14587 mocked time instead of actual time. Fixes bug 23077; bugfix
14591 Changes in version 0.3.1.6-rc - 2017-09-05
14592 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
14593 release series, including a bug that produced weird behavior on
14594 Windows directory caches.
14596 This is the first release candidate in the Tor 0.3.1 series. If we
14597 find no new bugs or regressions here, the first stable 0.3.1 release
14598 will be nearly identical to it.
14600 o Major bugfixes (windows, directory cache):
14601 - On Windows, do not try to delete cached consensus documents and
14602 diffs before they are unmapped from memory--Windows won't allow
14603 that. Instead, allow the consensus cache directory to grow larger,
14604 to hold files that might need to stay around longer. Fixes bug
14605 22752; bugfix on 0.3.1.1-alpha.
14607 o Minor features (directory authority):
14608 - Improve the message that authorities report to relays that present
14609 RSA/Ed25519 keypairs that conflict with previously pinned keys.
14610 Closes ticket 22348.
14612 o Minor features (geoip):
14613 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
14616 o Minor features (testing):
14617 - Add more tests for compression backend initialization. Closes
14620 o Minor bugfixes (directory cache):
14621 - Fix a memory leak when recovering space in the consensus cache.
14622 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
14624 o Minor bugfixes (hidden service):
14625 - Increase the number of circuits that a service is allowed to
14626 open over a specific period of time. The value was lower than it
14627 should be (8 vs 12) in the normal case of 3 introduction points.
14628 Fixes bug 22159; bugfix on 0.3.0.5-rc.
14629 - Fix a BUG warning during HSv3 descriptor decoding that could be
14630 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
14631 on 0.3.0.1-alpha. Bug found by "haxxpop".
14632 - Rate-limit the log messages if we exceed the maximum number of
14633 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
14635 o Minor bugfixes (logging, relay):
14636 - Remove a forgotten debugging message when an introduction point
14637 successfully establishes a hidden service prop224 circuit with
14639 - Change three other log_warn() for an introduction point to
14640 protocol warnings, because they can be failure from the network
14641 and are not relevant to the operator. Fixes bug 23078; bugfix on
14642 0.3.0.1-alpha and 0.3.0.2-alpha.
14644 o Minor bugfixes (relay):
14645 - When a relay is not running as a directory cache, it will no
14646 longer generate compressed consensuses and consensus diff
14647 information. Previously, this was a waste of disk and CPU. Fixes
14648 bug 23275; bugfix on 0.3.1.1-alpha.
14650 o Minor bugfixes (robustness, error handling):
14651 - Improve our handling of the cases where OpenSSL encounters a
14652 memory error while encoding keys and certificates. We haven't
14653 observed these errors in the wild, but if they do happen, we now
14654 detect and respond better. Fixes bug 19418; bugfix on all versions
14655 of Tor. Reported by Guido Vranken.
14657 o Minor bugfixes (stability):
14658 - Avoid crashing on a double-free when unable to load or process an
14659 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
14660 with the clang static analyzer.
14662 o Minor bugfixes (testing):
14663 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
14664 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
14665 - Port the hs_ntor handshake test to work correctly with recent
14666 versions of the pysha3 module. Fixes bug 23071; bugfix
14669 o Minor bugfixes (Windows service):
14670 - When running as a Windows service, set the ID of the main thread
14671 correctly. Failure to do so made us fail to send log messages to
14672 the controller in 0.2.1.16-rc, slowed down controller event
14673 delivery in 0.2.7.3-rc and later, and crash with an assertion
14674 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14675 Patch and diagnosis from "Vort".
14678 Changes in version 0.3.0.10 - 2017-08-02
14679 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
14680 from the current Tor alpha series. OpenBSD users and TPROXY users
14681 should upgrade; others are probably okay sticking with 0.3.0.9.
14683 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
14684 - Tor's repository now includes a Travis Continuous Integration (CI)
14685 configuration file (.travis.yml). This is meant to help new
14686 developers and contributors who fork Tor to a Github repository be
14687 better able to test their changes, and understand what we expect
14688 to pass. To use this new build feature, you must fork Tor to your
14689 Github account, then go into the "Integrations" menu in the
14690 repository settings for your fork and enable Travis, then push
14691 your changes. Closes ticket 22636.
14693 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14694 - Fix a typo that had prevented TPROXY-based transparent proxying
14695 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14696 Patch from "d4fq0fQAgoJ".
14698 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14699 - Avoid an assertion failure bug affecting our implementation of
14700 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14701 handling of "0xbar" differs from what we had expected. Fixes bug
14702 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14704 o Minor features (backport from 0.3.1.5-alpha):
14705 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14708 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
14709 - Roll over monthly accounting at the configured hour and minute,
14710 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14711 Found by Andrey Karpov with PVS-Studio.
14713 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
14714 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14715 bugfix on 0.2.8.1-alpha.
14716 - Fix warnings when building with libscrypt and openssl scrypt
14717 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14718 - When building with certain versions of the mingw C header files,
14719 avoid float-conversion warnings when calling the C functions
14720 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14723 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14724 - Backport a fix for an "unused variable" warning that appeared
14725 in some versions of mingw. Fixes bug 22838; bugfix on
14728 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14729 - Avoid Coverity build warnings related to our BUG() macro. By
14730 default, Coverity treats BUG() as the Linux kernel does: an
14731 instant abort(). We need to override that so our BUG() macro
14732 doesn't prevent Coverity from analyzing functions that use it.
14733 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14735 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
14736 - When rejecting a router descriptor for running an obsolete version
14737 of Tor without ntor support, warn about the obsolete tor version,
14738 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14740 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14741 - Avoid a sandbox failure when trying to re-bind to a socket and
14742 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14744 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
14745 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14746 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14749 Changes in version 0.3.1.5-alpha - 2017-08-01
14750 Tor 0.3.1.5-alpha improves the performance of consensus diff
14751 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
14752 several other bugs. If no serious bugs are found in this version, the
14753 next version will be a release candidate.
14755 This release also marks the end of support for the Tor 0.2.4.x,
14756 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
14757 further bug or security fixes. Anyone still running or distributing
14758 one of those versions should upgrade.
14760 o Major features (build system, continuous integration):
14761 - Tor's repository now includes a Travis Continuous Integration (CI)
14762 configuration file (.travis.yml). This is meant to help new
14763 developers and contributors who fork Tor to a Github repository be
14764 better able to test their changes, and understand what we expect
14765 to pass. To use this new build feature, you must fork Tor to your
14766 Github account, then go into the "Integrations" menu in the
14767 repository settings for your fork and enable Travis, then push
14768 your changes. Closes ticket 22636.
14770 o Major bugfixes (openbsd, denial-of-service):
14771 - Avoid an assertion failure bug affecting our implementation of
14772 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14773 handling of "0xbar" differs from what we had expected. Fixes bug
14774 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14776 o Major bugfixes (relay, performance):
14777 - Perform circuit handshake operations at a higher priority than we
14778 use for consensus diff creation and compression. This should
14779 prevent circuits from starving when a relay or bridge receives a
14780 new consensus, especially on lower-powered machines. Fixes bug
14781 22883; bugfix on 0.3.1.1-alpha.
14783 o Minor features (bridge authority):
14784 - Add "fingerprint" lines to the networkstatus-bridges file produced
14785 by bridge authorities. Closes ticket 22207.
14787 o Minor features (directory cache, consensus diff):
14788 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
14789 operators with low-resource environments to adjust the number of
14790 consensuses they'll store and generate diffs from. Most cache
14791 operators should leave it unchanged. Helps to work around
14794 o Minor features (geoip):
14795 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14798 o Minor features (relay, performance):
14799 - Always start relays with at least two worker threads, to prevent
14800 priority inversion on slow tasks. Part of the fix for bug 22883.
14801 - Allow background work to be queued with different priorities, so
14802 that a big pile of slow low-priority jobs will not starve out
14803 higher priority jobs. This lays the groundwork for a fix for
14806 o Minor bugfixes (build system, rust):
14807 - Fix a problem where Rust toolchains were not being found when
14808 building without --enable-cargo-online-mode, due to setting the
14809 $HOME environment variable instead of $CARGO_HOME. Fixes bug
14810 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
14812 o Minor bugfixes (compatibility, zstd):
14813 - Write zstd epilogues correctly when the epilogue requires
14814 reallocation of the output buffer, even with zstd 1.3.0.
14815 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
14816 22927; bugfix on 0.3.1.1-alpha.
14818 o Minor bugfixes (compilation warnings):
14819 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
14820 22915; bugfix on 0.2.8.1-alpha.
14821 - Fix warnings when building with libscrypt and openssl scrypt
14822 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14823 - Compile correctly when both openssl 1.1.0 and libscrypt are
14824 detected. Previously this would cause an error. Fixes bug 22892;
14825 bugfix on 0.3.1.1-alpha.
14826 - When building with certain versions of the mingw C header files,
14827 avoid float-conversion warnings when calling the C functions
14828 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14831 o Minor bugfixes (coverity build support):
14832 - Avoid Coverity build warnings related to our BUG() macro. By
14833 default, Coverity treats BUG() as the Linux kernel does: an
14834 instant abort(). We need to override that so our BUG() macro
14835 doesn't prevent Coverity from analyzing functions that use it.
14836 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14838 o Minor bugfixes (directory authority):
14839 - When a directory authority rejects a descriptor or extrainfo with
14840 a given digest, mark that digest as undownloadable, so that we do
14841 not attempt to download it again over and over. We previously
14842 tried to avoid downloading such descriptors by other means, but we
14843 didn't notice if we accidentally downloaded one anyway. This
14844 behavior became problematic in 0.2.7.2-alpha, when authorities
14845 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14848 o Minor bugfixes (error reporting, windows):
14849 - When formatting Windows error messages, use the English format to
14850 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
14853 o Minor bugfixes (file limits, osx):
14854 - When setting the maximum number of connections allowed by the OS,
14855 always allow some extra file descriptors for other files. Fixes
14856 bug 22797; bugfix on 0.2.0.10-alpha.
14858 o Minor bugfixes (linux seccomp2 sandbox):
14859 - Avoid a sandbox failure when trying to re-bind to a socket and
14860 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14862 o Minor bugfixes (memory leaks):
14863 - Fix a small memory leak when validating a configuration that uses
14864 two or more AF_UNIX sockets for the same port type. Fixes bug
14865 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
14867 o Minor bugfixes (unit tests):
14868 - test_consdiff_base64cmp would fail on OS X because while OS X
14869 follows the standard of (less than zero/zero/greater than zero),
14870 it doesn't follow the convention of (-1/0/+1). Make the test
14871 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
14872 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14873 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14876 Changes in version 0.3.1.4-alpha - 2017-06-29
14877 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
14878 to use a guard that was in the same network family as a chosen exit
14879 relay. This is a security regression; all clients running earlier
14880 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
14883 This release also fixes several other bugs introduced in 0.3.0.x
14884 and 0.3.1.x, including others that can affect bandwidth usage
14887 o New dependencies:
14888 - To build with zstd and lzma support, Tor now requires the
14889 pkg-config tool at build time. (This requirement was new in
14890 0.3.1.1-alpha, but was not noted at the time. Noting it here to
14891 close ticket 22623.)
14893 o Major bugfixes (path selection, security):
14894 - When choosing which guard to use for a circuit, avoid the exit's
14895 family along with the exit itself. Previously, the new guard
14896 selection logic avoided the exit, but did not consider its family.
14897 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
14898 006 and CVE-2017-0377.
14900 o Major bugfixes (compression, zstd):
14901 - Correctly detect a full buffer when decompressing a large zstd-
14902 compressed input. Previously, we would sometimes treat a full
14903 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
14905 o Major bugfixes (directory protocol):
14906 - Ensure that we send "304 Not modified" as HTTP status code when a
14907 client is attempting to fetch a consensus or consensus diff, and
14908 the best one we can send them is one they already have. Fixes bug
14909 22702; bugfix on 0.3.1.1-alpha.
14911 o Major bugfixes (entry guards):
14912 - When starting with an old consensus, do not add new entry guards
14913 unless the consensus is "reasonably live" (under 1 day old). Fixes
14914 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
14916 o Minor features (bug mitigation, diagnostics, logging):
14917 - Avoid an assertion failure, and log a better error message, when
14918 unable to remove a file from the consensus cache on Windows.
14919 Attempts to mitigate and diagnose bug 22752.
14921 o Minor features (geoip):
14922 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
14925 o Minor bugfixes (compression):
14926 - When compressing or decompressing a buffer, check for a failure to
14927 create a compression object. Fixes bug 22626; bugfix
14929 - When decompressing a buffer, check for extra data after the end of
14930 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
14931 - When decompressing an object received over an anonymous directory
14932 connection, if we have already decompressed it using an acceptable
14933 compression method, do not reject it for looking like an
14934 unacceptable compression method. Fixes part of bug 22670; bugfix
14936 - When serving directory votes compressed with zlib, do not claim to
14937 have compressed them with zstd. Fixes bug 22669; bugfix
14939 - When spooling compressed data to an output buffer, don't try to
14940 spool more data when there is no more data to spool and we are not
14941 trying to flush the input. Previously, we would sometimes launch
14942 compression requests with nothing to do, which interferes with our
14943 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
14945 o Minor bugfixes (defensive programming):
14946 - Detect and break out of infinite loops in our compression code. We
14947 don't think that any such loops exist now, but it's best to be
14948 safe. Closes ticket 22672.
14949 - Fix a memset() off the end of an array when packing cells. This
14950 bug should be harmless in practice, since the corrupted bytes are
14951 still in the same structure, and are always padding bytes,
14952 ignored, or immediately overwritten, depending on compiler
14953 behavior. Nevertheless, because the memset()'s purpose is to make
14954 sure that any other cell-handling bugs can't expose bytes to the
14955 network, we need to fix it. Fixes bug 22737; bugfix on
14956 0.2.4.11-alpha. Fixes CID 1401591.
14958 o Minor bugfixes (linux seccomp2 sandbox):
14959 - Permit the fchmod system call, to avoid crashing on startup when
14960 starting with the seccomp2 sandbox and an unexpected set of
14961 permissions on the data directory or its contents. Fixes bug
14962 22516; bugfix on 0.2.5.4-alpha.
14963 - Fix a crash in the LZMA module, when the sandbox was enabled, and
14964 liblzma would allocate more than 16 MB of memory. We solve this by
14965 bumping the mprotect() limit in the sandbox module from 16 MB to
14966 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
14968 o Minor bugfixes (logging):
14969 - When decompressing, do not warn if we fail to decompress using a
14970 compression method that we merely guessed. Fixes part of bug
14971 22670; bugfix on 0.1.1.14-alpha.
14972 - When decompressing, treat mismatch between content-encoding and
14973 actual compression type as a protocol warning. Fixes part of bug
14974 22670; bugfix on 0.1.1.9-alpha.
14975 - Downgrade "assigned_to_cpuworker failed" message to info-level
14976 severity. In every case that can reach it, either a better warning
14977 has already been logged, or no warning is warranted. Fixes bug
14978 22356; bugfix on 0.2.6.3-alpha.
14979 - Demote a warn that was caused by libevent delays to info if
14980 netflow padding is less than 4.5 seconds late, or to notice
14981 if it is more (4.5 seconds is the amount of time that a netflow
14982 record might be emitted after, if we chose the maximum timeout).
14983 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
14985 o Minor bugfixes (process behavior):
14986 - When exiting because of an error, always exit with a nonzero exit
14987 status. Previously, we would fail to report an error in our exit
14988 status in cases related to __OwningControllerProcess failure,
14989 lockfile contention, and Ed25519 key initialization. Fixes bug
14990 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
14991 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
14995 - Add a manpage description for the key-pinning-journal file. Closes
14997 - Correctly note that bandwidth accounting values are stored in the
14998 state file, and the bw_accounting file is now obsolete. Closes
15000 - Document more of the files in the Tor data directory, including
15001 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
15002 approved-routers, sr-random, and diff-cache. Found while fixing
15006 Changes in version 0.3.0.9 - 2017-06-29
15007 Tor 0.3.0.9 fixes a path selection bug that would allow a client
15008 to use a guard that was in the same network family as a chosen exit
15009 relay. This is a security regression; all clients running earlier
15010 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
15013 This release also backports several other bugfixes from the 0.3.1.x
15016 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
15017 - When choosing which guard to use for a circuit, avoid the exit's
15018 family along with the exit itself. Previously, the new guard
15019 selection logic avoided the exit, but did not consider its family.
15020 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
15021 006 and CVE-2017-0377.
15023 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
15024 - Don't block bootstrapping when a primary bridge is offline and we
15025 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15026 21969; bugfix on 0.3.0.3-alpha.
15028 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
15029 - When starting with an old consensus, do not add new entry guards
15030 unless the consensus is "reasonably live" (under 1 day old). Fixes
15031 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
15033 o Minor features (geoip):
15034 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
15037 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
15038 - Reject version numbers with non-numeric prefixes (such as +, -, or
15039 whitespace). Disallowing whitespace prevents differential version
15040 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15041 and part of 21508; bugfix on 0.0.8pre1.
15043 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
15044 - Permit the fchmod system call, to avoid crashing on startup when
15045 starting with the seccomp2 sandbox and an unexpected set of
15046 permissions on the data directory or its contents. Fixes bug
15047 22516; bugfix on 0.2.5.4-alpha.
15049 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
15050 - Fix a memset() off the end of an array when packing cells. This
15051 bug should be harmless in practice, since the corrupted bytes are
15052 still in the same structure, and are always padding bytes,
15053 ignored, or immediately overwritten, depending on compiler
15054 behavior. Nevertheless, because the memset()'s purpose is to make
15055 sure that any other cell-handling bugs can't expose bytes to the
15056 network, we need to fix it. Fixes bug 22737; bugfix on
15057 0.2.4.11-alpha. Fixes CID 1401591.
15060 Changes in version 0.3.1.3-alpha - 2017-06-08
15061 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
15062 remotely crash a hidden service with an assertion failure. Anyone
15063 running a hidden service should upgrade to this version, or to some
15064 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15066 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
15067 that sometimes made relays unreliable, as well as several other
15068 bugfixes described below.
15070 o Major bugfixes (hidden service, relay, security):
15071 - Fix a remotely triggerable assertion failure when a hidden service
15072 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15073 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15074 - Fix a remotely triggerable assertion failure caused by receiving a
15075 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15076 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15079 o Major bugfixes (relay, link handshake):
15080 - When performing the v3 link handshake on a TLS connection, report
15081 that we have the x509 certificate that we actually used on that
15082 connection, even if we have changed certificates since that
15083 connection was first opened. Previously, we would claim to have
15084 used our most recent x509 link certificate, which would sometimes
15085 make the link handshake fail. Fixes one case of bug 22460; bugfix
15088 o Major bugfixes (relays, key management):
15089 - Regenerate link and authentication certificates whenever the key
15090 that signs them changes; also, regenerate link certificates
15091 whenever the signed key changes. Previously, these processes were
15092 only weakly coupled, and we relays could (for minutes to hours)
15093 wind up with an inconsistent set of keys and certificates, which
15094 other relays would not accept. Fixes two cases of bug 22460;
15095 bugfix on 0.3.0.1-alpha.
15096 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15097 send the certificate that matches the x509 certificate that we
15098 used on the TLS connection. Previously, there was a race condition
15099 if the TLS context rotated after we began the TLS handshake but
15100 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15103 o Major bugfixes (torrc, crash):
15104 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
15105 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
15107 o Minor features (code style):
15108 - Add "Falls through" comments to our codebase, in order to silence
15109 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
15110 Stieger. Closes ticket 22446.
15112 o Minor features (diagnostic):
15113 - Add logging messages to try to diagnose a rare bug that seems to
15114 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
15115 think this is happening because of incorrect system clocks, but
15116 we'd like to know for certain. Diagnostic for bug 22466.
15118 o Minor bugfixes (correctness):
15119 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15120 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15122 o Minor bugfixes (directory protocol):
15123 - Check for libzstd >= 1.1, because older versions lack the
15124 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
15126 o Minor bugfixes (link handshake):
15127 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15128 months, and regenerate it when it is within one month of expiring.
15129 Previously, we had generated this certificate at startup with a
15130 ten-year lifetime, but that could lead to weird behavior when Tor
15131 was started with a grossly inaccurate clock. Mitigates bug 22466;
15132 mitigation on 0.3.0.1-alpha.
15134 o Minor bugfixes (storage directories):
15135 - Always check for underflows in the cached storage directory usage.
15136 If the usage does underflow, re-calculate it. Also, avoid a
15137 separate underflow when the usage is not known. Fixes bug 22424;
15138 bugfix on 0.3.1.1-alpha.
15140 o Minor bugfixes (unit tests):
15141 - The unit tests now pass on systems where localhost is misconfigured
15142 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
15146 - Clarify the manpage for the (deprecated) torify script. Closes
15149 Changes in version 0.3.0.8 - 2017-06-08
15150 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
15151 remotely crash a hidden service with an assertion failure. Anyone
15152 running a hidden service should upgrade to this version, or to some
15153 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
15155 Tor 0.3.0.8 also includes fixes for several key management bugs
15156 that sometimes made relays unreliable, as well as several other
15157 bugfixes described below.
15159 o Major bugfixes (hidden service, relay, security, backport
15160 from 0.3.1.3-alpha):
15161 - Fix a remotely triggerable assertion failure when a hidden service
15162 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
15163 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
15164 - Fix a remotely triggerable assertion failure caused by receiving a
15165 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15166 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15169 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15170 - When performing the v3 link handshake on a TLS connection, report
15171 that we have the x509 certificate that we actually used on that
15172 connection, even if we have changed certificates since that
15173 connection was first opened. Previously, we would claim to have
15174 used our most recent x509 link certificate, which would sometimes
15175 make the link handshake fail. Fixes one case of bug 22460; bugfix
15178 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
15179 - Regenerate link and authentication certificates whenever the key
15180 that signs them changes; also, regenerate link certificates
15181 whenever the signed key changes. Previously, these processes were
15182 only weakly coupled, and we relays could (for minutes to hours)
15183 wind up with an inconsistent set of keys and certificates, which
15184 other relays would not accept. Fixes two cases of bug 22460;
15185 bugfix on 0.3.0.1-alpha.
15186 - When sending an Ed25519 signing->link certificate in a CERTS cell,
15187 send the certificate that matches the x509 certificate that we
15188 used on the TLS connection. Previously, there was a race condition
15189 if the TLS context rotated after we began the TLS handshake but
15190 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
15193 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
15194 - Stop rejecting v3 hidden service descriptors because their size
15195 did not match an old padding rule. Fixes bug 22447; bugfix on
15198 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15199 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15200 December 2016 (of which ~126 were still functional) with a list of
15201 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15202 2017. Resolves ticket 21564.
15204 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
15205 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15206 bug 22252; bugfix on 0.2.9.3-alpha.
15208 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15209 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15210 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15212 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
15213 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
15214 months, and regenerate it when it is within one month of expiring.
15215 Previously, we had generated this certificate at startup with a
15216 ten-year lifetime, but that could lead to weird behavior when Tor
15217 was started with a grossly inaccurate clock. Mitigates bug 22466;
15218 mitigation on 0.3.0.1-alpha.
15220 o Minor bugfixes (memory leak, directory authority, backport from
15222 - When directory authorities reject a router descriptor due to
15223 keypinning, free the router descriptor rather than leaking the
15224 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15227 Changes in version 0.2.9.11 - 2017-06-08
15228 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
15229 remotely crash a hidden service with an assertion failure. Anyone
15230 running a hidden service should upgrade to this version, or to some
15231 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15232 are not affected by TROVE-2017-004.)
15234 Tor 0.2.9.11 also backports fixes for several key management bugs
15235 that sometimes made relays unreliable, as well as several other
15236 bugfixes described below.
15238 o Major bugfixes (hidden service, relay, security, backport
15239 from 0.3.1.3-alpha):
15240 - Fix a remotely triggerable assertion failure caused by receiving a
15241 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15242 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15245 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
15246 - When performing the v3 link handshake on a TLS connection, report
15247 that we have the x509 certificate that we actually used on that
15248 connection, even if we have changed certificates since that
15249 connection was first opened. Previously, we would claim to have
15250 used our most recent x509 link certificate, which would sometimes
15251 make the link handshake fail. Fixes one case of bug 22460; bugfix
15254 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15255 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15256 December 2016 (of which ~126 were still functional) with a list of
15257 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15258 2017. Resolves ticket 21564.
15260 o Minor features (future-proofing, backport from 0.3.0.7):
15261 - Tor no longer refuses to download microdescriptors or descriptors if
15262 they are listed as "published in the future". This change will
15263 eventually allow us to stop listing meaningful "published" dates
15264 in microdescriptor consensuses, and thereby allow us to reduce the
15265 resources required to download consensus diffs by over 50%.
15266 Implements part of ticket 21642; implements part of proposal 275.
15268 o Minor features (directory authorities, backport from 0.3.0.4-rc)
15269 - Directory authorities now reject relays running versions
15270 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15271 suffer from bug 20499 and don't keep their consensus cache
15272 up-to-date. Resolves ticket 20509.
15274 o Minor features (geoip):
15275 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15278 o Minor bugfixes (control port, backport from 0.3.0.6):
15279 - The GETINFO extra-info/digest/<digest> command was broken because
15280 of a wrong base16 decode return value check, introduced when
15281 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15283 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
15284 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15285 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15287 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
15288 - The getpid() system call is now permitted under the Linux seccomp2
15289 sandbox, to avoid crashing with versions of OpenSSL (and other
15290 libraries) that attempt to learn the process's PID by using the
15291 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15294 o Minor bugfixes (memory leak, directory authority, backport
15295 from 0.3.1.2-alpha):
15296 - When directory authorities reject a router descriptor due to
15297 keypinning, free the router descriptor rather than leaking the
15298 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15300 Changes in version 0.2.8.14 - 2017-06-08
15301 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15302 remotely crash a hidden service with an assertion failure. Anyone
15303 running a hidden service should upgrade to this version, or to some
15304 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15305 are not affected by TROVE-2017-004.)
15307 o Major bugfixes (hidden service, relay, security):
15308 - Fix a remotely triggerable assertion failure caused by receiving a
15309 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15310 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15313 o Minor features (geoip):
15314 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15317 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
15318 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15319 December 2016 (of which ~126 were still functional) with a list of
15320 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15321 2017. Resolves ticket 21564.
15323 o Minor bugfixes (correctness):
15324 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15325 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15327 Changes in version 0.2.7.8 - 2017-06-08
15328 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15329 remotely crash a hidden service with an assertion failure. Anyone
15330 running a hidden service should upgrade to this version, or to some
15331 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15332 are not affected by TROVE-2017-004.)
15334 o Major bugfixes (hidden service, relay, security):
15335 - Fix a remotely triggerable assertion failure caused by receiving a
15336 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15337 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15340 o Minor features (geoip):
15341 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15344 o Minor bugfixes (correctness):
15345 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15346 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15349 Changes in version 0.2.6.12 - 2017-06-08
15350 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
15351 remotely crash a hidden service with an assertion failure. Anyone
15352 running a hidden service should upgrade to this version, or to some
15353 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15354 are not affected by TROVE-2017-004.)
15356 o Major bugfixes (hidden service, relay, security):
15357 - Fix a remotely triggerable assertion failure caused by receiving a
15358 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15359 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15362 o Minor features (geoip):
15363 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15366 o Minor bugfixes (correctness):
15367 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15368 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15370 Changes in version 0.2.5.14 - 2017-06-08
15371 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
15372 remotely crash a hidden service with an assertion failure. Anyone
15373 running a hidden service should upgrade to this version, or to some
15374 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15375 are not affected by TROVE-2017-004.)
15377 o Major bugfixes (hidden service, relay, security):
15378 - Fix a remotely triggerable assertion failure caused by receiving a
15379 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15380 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15383 o Minor features (geoip):
15384 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15387 o Minor bugfixes (correctness):
15388 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15389 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15391 Changes in version 0.2.4.29 - 2017-06-08
15392 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
15393 remotely crash a hidden service with an assertion failure. Anyone
15394 running a hidden service should upgrade to this version, or to some
15395 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15396 are not affected by TROVE-2017-004.)
15398 o Major bugfixes (hidden service, relay, security):
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 Minor features (geoip):
15405 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15408 o Minor bugfixes (correctness):
15409 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15410 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15413 Changes in version 0.3.1.2-alpha - 2017-05-26
15414 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
15415 fixes a few bugs found while testing 0.3.1.1-alpha, including a
15416 memory corruption bug that affected relay stability.
15418 o Major bugfixes (crash, relay):
15419 - Fix a memory-corruption bug in relays that set MyFamily.
15420 Previously, they would double-free MyFamily elements when making
15421 the next descriptor or when changing their configuration. Fixes
15422 bug 22368; bugfix on 0.3.1.1-alpha.
15424 o Minor bugfixes (logging):
15425 - Log a better message when a directory authority replies to an
15426 upload with an unexpected status code. Fixes bug 11121; bugfix
15429 o Minor bugfixes (memory leak, directory authority):
15430 - When directory authorities reject a router descriptor due to
15431 keypinning, free the router descriptor rather than leaking the
15432 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15435 Changes in version 0.3.1.1-alpha - 2017-05-22
15436 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
15437 reduces the bandwidth usage for Tor's directory protocol, adds some
15438 basic padding to resist netflow-based traffic analysis and to serve as
15439 the basis of other padding in the future, and adds rust support to the
15442 It also contains numerous other small features and improvements to
15443 security, correctness, and performance.
15445 Below are the changes since 0.3.0.7.
15447 o Major features (directory protocol):
15448 - Tor relays and authorities can now serve clients an abbreviated
15449 version of the consensus document, containing only the changes
15450 since an older consensus document that the client holds. Clients
15451 now request these documents when available. When both client and
15452 server use this new protocol, they will use far less bandwidth (up
15453 to 94% less) to keep the client's consensus up-to-date. Implements
15454 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
15455 - Tor can now compress directory traffic with lzma or with zstd
15456 compression algorithms, which can deliver better bandwidth
15457 performance. Because lzma is computationally expensive, it's only
15458 used for documents that can be compressed once and served many
15459 times. Support for these algorithms requires that tor is built
15460 with the libzstd and/or liblzma libraries available. Implements
15461 proposal 278; closes ticket 21662.
15462 - Relays now perform the more expensive compression operations, and
15463 consensus diff generation, in worker threads. This separation
15464 avoids delaying the main thread when a new consensus arrives.
15466 o Major features (experimental):
15467 - Tor can now build modules written in Rust. To turn this on, pass
15468 the "--enable-rust" flag to the configure script. It's not time to
15469 get excited yet: currently, there is no actual Rust functionality
15470 beyond some simple glue code, and a notice at startup to tell you
15471 that Rust is running. Still, we hope that programmers and
15472 packagers will try building Tor with Rust support, so that we can
15473 find issues and solve portability problems. Closes ticket 22106.
15475 o Major features (traffic analysis resistance):
15476 - Connections between clients and relays now send a padding cell in
15477 each direction every 1.5 to 9.5 seconds (tunable via consensus
15478 parameters). This padding will not resist specialized
15479 eavesdroppers, but it should be enough to make many ISPs' routine
15480 network flow logging less useful in traffic analysis against
15483 Padding is negotiated using Tor's link protocol, so both relays
15484 and clients must upgrade for this to take effect. Clients may
15485 still send padding despite the relay's version by setting
15486 ConnectionPadding 1 in torrc, and may disable padding by setting
15487 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
15488 users with the torrc option ReducedConnectionPadding. Implements
15489 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
15490 - Relays will publish 24 hour totals of padding and non-padding cell
15491 counts to their extra-info descriptors, unless PaddingStatistics 0
15492 is set in torrc. These 24 hour totals are also rounded to
15493 multiples of 10000.
15495 o Major bugfixes (connection usage):
15496 - We use NETINFO cells to try to determine if both relays involved
15497 in a connection will agree on the canonical status of that
15498 connection. We prefer the connections where this is the case for
15499 extend cells, and try to close connections where relays disagree
15500 on their canonical status early. Also, we now prefer the oldest
15501 valid connection for extend cells. These two changes should reduce
15502 the number of long-term connections that are kept open between
15503 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
15504 - Relays now log hourly statistics (look for
15505 "channel_check_for_duplicates" lines) on the total number of
15506 connections to other relays. If the number of connections per
15507 relay is unexpectedly large, this log message is at notice level.
15508 Otherwise it is at info.
15510 o Major bugfixes (entry guards):
15511 - Don't block bootstrapping when a primary bridge is offline and we
15512 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15513 21969; bugfix on 0.3.0.3-alpha.
15515 o Major bugfixes (linux TPROXY support):
15516 - Fix a typo that had prevented TPROXY-based transparent proxying
15517 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15518 Patch from "d4fq0fQAgoJ".
15520 o Minor features (security, windows):
15521 - Enable a couple of pieces of Windows hardening: one
15522 (HeapEnableTerminationOnCorruption) that has been on-by-default
15523 since Windows 8, and unavailable before Windows 7; and one
15524 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
15525 affect us, but shouldn't do any harm. Closes ticket 21953.
15527 o Minor features (config options):
15528 - Allow "%include" directives in torrc configuration files. These
15529 directives import the settings from other files, or from all the
15530 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
15531 - Make SAVECONF return an error when overwriting a torrc that has
15532 includes. Using SAVECONF with the FORCE option will allow it to
15533 overwrite torrc even if includes are used. Related to ticket 1922.
15534 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
15535 will work without the FORCE option. Related to ticket 1922.
15537 o Minor features (controller):
15538 - Warn the first time that a controller requests data in the long-
15539 deprecated 'GETINFO network-status' format. Closes ticket 21703.
15541 o Minor features (defaults):
15542 - The default value for UseCreateFast is now 0: clients which
15543 haven't yet received a consensus document will now use a proper
15544 ntor handshake to talk to their directory servers whenever they
15545 can. Closes ticket 21407.
15546 - Onion key rotation and expiry intervals are now defined as a
15547 network consensus parameter, per proposal 274. The default
15548 lifetime of an onion key is increased from 7 to 28 days. Old onion
15549 keys will expire after 7 days by default. This change will make
15550 consensus diffs much smaller, and save significant bandwidth.
15551 Closes ticket 21641.
15553 o Minor features (fallback directory list):
15554 - Update the fallback directory mirror whitelist and blacklist based
15555 on operator emails. Closes task 21121.
15556 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15557 December 2016 (of which ~126 were still functional) with a list of
15558 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15559 2017. Resolves ticket 21564.
15561 o Minor features (hidden services, logging):
15562 - Log a message when a hidden service descriptor has fewer
15563 introduction points than specified in
15564 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
15565 - Log a message when a hidden service reaches its introduction point
15566 circuit limit, and when that limit is reset. Follow up to ticket
15567 21594; closes ticket 21622.
15568 - Warn user if multiple entries in EntryNodes and at least one
15569 HiddenService are used together. Pinning EntryNodes along with a
15570 hidden service can be possibly harmful; for instance see ticket
15571 14917 or 21155. Closes ticket 21155.
15573 o Minor features (linux seccomp2 sandbox):
15574 - We now have a document storage backend compatible with the Linux
15575 seccomp2 sandbox. This backend is used for consensus documents and
15576 diffs between them; in the long term, we'd like to use it for
15577 unparseable directory material too. Closes ticket 21645
15578 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
15579 from 1MB to 16MB. This was necessary with the glibc allocator in
15580 order to allow worker threads to allocate more memory -- which in
15581 turn is necessary because of our new use of worker threads for
15582 compression. Closes ticket 22096.
15584 o Minor features (logging):
15585 - Log files are no longer created world-readable by default.
15586 (Previously, most distributors would store the logs in a non-
15587 world-readable location to prevent inappropriate access. This
15588 change is an extra precaution.) Closes ticket 21729; patch
15591 o Minor features (performance):
15592 - Our Keccak (SHA-3) implementation now accesses memory more
15593 efficiently, especially on little-endian systems. Closes
15595 - Add an O(1) implementation of channel_find_by_global_id(), to
15596 speed some controller functions.
15598 o Minor features (relay, configuration):
15599 - The MyFamily option may now be repeated as many times as desired,
15600 for relays that want to configure large families. Closes ticket
15601 4998; patch by Daniel Pinto.
15603 o Minor features (safety):
15604 - Add an explicit check to extrainfo_parse_entry_from_string() for
15605 NULL inputs. We don't believe this can actually happen, but it may
15606 help silence a warning from the Clang analyzer. Closes
15609 o Minor features (testing):
15610 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
15611 When Tor is compiled with this option, we disable a number of
15612 redundant memory-safety failsafes that are intended to stop bugs
15613 from becoming security issues. This makes it easier to hunt for
15614 bugs that would be security issues without the failsafes turned
15615 on. Closes ticket 21439.
15616 - Add a general event-tracing instrumentation support to Tor. This
15617 subsystem will enable developers and researchers to add fine-
15618 grained instrumentation to their Tor instances, for use when
15619 examining Tor network performance issues. There are no trace
15620 events yet, and event-tracing is off by default unless enabled at
15621 compile time. Implements ticket 13802.
15622 - Improve our version parsing tests: add tests for typical version
15623 components, add tests for invalid versions, including numeric
15624 range and non-numeric prefixes. Unit tests 21278, 21450, and
15625 21507. Partially implements 21470.
15627 o Minor bugfixes (bandwidth accounting):
15628 - Roll over monthly accounting at the configured hour and minute,
15629 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15630 Found by Andrey Karpov with PVS-Studio.
15632 o Minor bugfixes (code correctness):
15633 - Accurately identify client connections by their lack of peer
15634 authentication. This means that we bail out earlier if asked to
15635 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
15638 o Minor bugfixes (configuration):
15639 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15640 bug 22252; bugfix on 0.2.9.3-alpha.
15642 o Minor bugfixes (connection lifespan):
15643 - Allow more control over how long TLS connections are kept open:
15644 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
15645 single option called CircuitsAvailableTimeout. Also, allow the
15646 consensus to control the default values for both this preference
15647 and the lifespan of relay-to-relay connections. Fixes bug 17592;
15648 bugfix on 0.2.5.5-alpha.
15649 - Increase the initial circuit build timeout testing frequency, to
15650 help ensure that ReducedConnectionPadding clients finish learning
15651 a timeout before their orconn would expire. The initial testing
15652 rate was set back in the days of TAP and before the Tor Browser
15653 updater, when we had to be much more careful about new clients
15654 making lots of circuits. With this change, a circuit build timeout
15655 is learned in about 15-20 minutes, instead of 100-120 minutes.
15657 o Minor bugfixes (controller):
15658 - GETINFO onions/current and onions/detached no longer respond with
15659 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
15660 - Trigger HS descriptor events on the control port when the client
15661 fails to pick a hidden service directory for a hidden service.
15662 This can happen if all the hidden service directories are in
15663 ExcludeNodes, or they have all been queried within the last 15
15664 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
15666 o Minor bugfixes (directory authority):
15667 - When rejecting a router descriptor for running an obsolete version
15668 of Tor without ntor support, warn about the obsolete tor version,
15669 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15670 - Prevent the shared randomness subsystem from asserting when
15671 initialized by a bridge authority with an incomplete configuration
15672 file. Fixes bug 21586; bugfix on 0.2.9.8.
15674 o Minor bugfixes (exit-side DNS):
15675 - Fix an untriggerable assertion that checked the output of a
15676 libevent DNS error, so that the assertion actually behaves as
15677 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
15678 Karpov using PVS-Studio.
15680 o Minor bugfixes (fallback directories):
15681 - Make the usage example in updateFallbackDirs.py actually work, and
15682 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
15683 - Decrease the guard flag average required to be a fallback. This
15684 allows us to keep relays that have their guard flag removed when
15685 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15686 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
15687 bugfix on 0.2.8.1-alpha.
15688 - Make sure fallback directory mirrors have the same address, port,
15689 and relay identity key for at least 30 days before they are
15690 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15692 o Minor bugfixes (hidden services):
15693 - Stop printing a cryptic warning when a hidden service gets a
15694 request to connect to a virtual port that it hasn't configured.
15695 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
15696 - Simplify hidden service descriptor creation by using an existing
15697 flag to check if an introduction point is established. Fixes bug
15698 21599; bugfix on 0.2.7.2-alpha.
15700 o Minor bugfixes (memory leak):
15701 - Fix a small memory leak at exit from the backtrace handler code.
15702 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
15704 o Minor bugfixes (protocol, logging):
15705 - Downgrade a log statement about unexpected relay cells from "bug"
15706 to "protocol warning", because there is at least one use case
15707 where it can be triggered by a buggy tor implementation. Fixes bug
15708 21293; bugfix on 0.1.1.14-alpha.
15710 o Minor bugfixes (testing):
15711 - Use unbuffered I/O for utility functions around the
15712 process_handle_t type. This fixes unit test failures reported on
15713 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
15714 - Make display of captured unit test log messages consistent. Fixes
15715 bug 21510; bugfix on 0.2.9.3-alpha.
15716 - Make test-network.sh always call chutney's test-network.sh.
15717 Previously, this only worked on systems which had bash installed,
15718 due to some bash-specific code in the script. Fixes bug 19699;
15719 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
15721 o Minor bugfixes (voting consistency):
15722 - Reject version numbers with non-numeric prefixes (such as +, -, or
15723 whitespace). Disallowing whitespace prevents differential version
15724 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15725 and part of 21508; bugfix on 0.0.8pre1.
15727 o Minor bugfixes (windows, relay):
15728 - Resolve "Failure from drain_fd: No error" warnings on Windows
15729 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
15731 o Code simplification and refactoring:
15732 - Break up the 630-line function connection_dir_client_reached_eof()
15733 into a dozen smaller functions. This change should help
15734 maintainability and readability of the client directory code.
15735 - Isolate our use of the openssl headers so that they are only
15736 included from our crypto wrapper modules, and from tests that
15737 examine those modules' internals. Closes ticket 21841.
15738 - Simplify our API to launch directory requests, making it more
15739 extensible and less error-prone. Now it's easier to add extra
15740 headers to directory requests. Closes ticket 21646.
15741 - Our base64 decoding functions no longer overestimate the output
15742 space that they need when parsing unpadded inputs. Closes
15744 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
15745 Resolves ticket 22213.
15746 - The logic that directory caches use to spool request to clients,
15747 serving them one part at a time so as not to allocate too much
15748 memory, has been refactored for consistency. Previously there was
15749 a separate spooling implementation per type of spoolable data. Now
15750 there is one common spooling implementation, with extensible data
15751 types. Closes ticket 21651.
15752 - Tor's compression module now supports multiple backends. Part of
15753 the implementation for proposal 278; closes ticket 21663.
15756 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
15757 Closes ticket 21873.
15758 - Correct documentation about the default DataDirectory value.
15759 Closes ticket 21151.
15760 - Document the default behavior of NumEntryGuards and
15761 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
15763 - Document key=value pluggable transport arguments for Bridge lines
15764 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
15765 - Note that bandwidth-limiting options don't affect TCP headers or
15766 DNS. Closes ticket 17170.
15768 o Removed features (configuration options, all in ticket 22060):
15769 - These configuration options are now marked Obsolete, and no longer
15770 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
15771 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
15772 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
15773 in 0.2.9.2-alpha and have now been removed. The previous default
15774 behavior is now always chosen; the previous (less secure) non-
15775 default behavior is now unavailable.
15776 - CloseHSClientCircuitsImmediatelyOnTimeout and
15777 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
15778 0.2.9.2-alpha and now have been removed. HS circuits never close
15779 on circuit build timeout; they have a longer timeout period.
15780 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
15781 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
15782 (and others) to configure listen-only and advertise-only addresses.
15784 o Removed features (tools):
15785 - We've removed the tor-checkkey tool from src/tools. Long ago, we
15786 used it to help people detect RSA keys that were generated by
15787 versions of Debian affected by CVE-2008-0166. But those keys have
15788 been out of circulation for ages, and this tool is no longer
15789 required. Closes ticket 21842.
15792 Changes in version 0.3.0.7 - 2017-05-15
15793 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
15794 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
15795 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
15796 clients are not affected.
15798 o Major bugfixes (hidden service directory, security):
15799 - Fix an assertion failure in the hidden service directory code, which
15800 could be used by an attacker to remotely cause a Tor relay process to
15801 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
15802 should upgrade. This security issue is tracked as TROVE-2017-002.
15803 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
15806 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15809 o Minor features (future-proofing):
15810 - Tor no longer refuses to download microdescriptors or descriptors
15811 if they are listed as "published in the future". This change will
15812 eventually allow us to stop listing meaningful "published" dates
15813 in microdescriptor consensuses, and thereby allow us to reduce the
15814 resources required to download consensus diffs by over 50%.
15815 Implements part of ticket 21642; implements part of proposal 275.
15817 o Minor bugfixes (Linux seccomp2 sandbox):
15818 - The getpid() system call is now permitted under the Linux seccomp2
15819 sandbox, to avoid crashing with versions of OpenSSL (and other
15820 libraries) that attempt to learn the process's PID by using the
15821 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15825 Changes in version 0.3.0.6 - 2017-04-26
15826 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
15828 With the 0.3.0 series, clients and relays now use Ed25519 keys to
15829 authenticate their link connections to relays, rather than the old
15830 RSA1024 keys that they used before. (Circuit crypto has been
15831 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
15832 the guard selection and replacement algorithm to behave more robustly
15833 in the presence of unreliable networks, and to resist guard-
15836 This series also includes numerous other small features and bugfixes,
15837 along with more groundwork for the upcoming hidden-services revamp.
15839 Per our stable release policy, we plan to support the Tor 0.3.0
15840 release series for at least the next nine months, or for three months
15841 after the first stable release of the 0.3.1 series: whichever is
15842 longer. If you need a release with long-term support, we recommend
15843 that you stay with the 0.2.9 series.
15845 Below are the changes since 0.3.0.5-rc. For a list of all changes
15846 since 0.2.9, see the ReleaseNotes file.
15848 o Minor features (geoip):
15849 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
15852 o Minor bugfixes (control port):
15853 - The GETINFO extra-info/digest/<digest> command was broken because
15854 of a wrong base16 decode return value check, introduced when
15855 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15857 o Minor bugfixes (crash prevention):
15858 - Fix a (currently untriggerable, but potentially dangerous) crash
15859 bug when base32-encoding inputs whose sizes are not a multiple of
15860 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
15863 Changes in version 0.3.0.5-rc - 2017-04-05
15864 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
15865 0.3.0 release series.
15867 This is the second release candidate in the Tor 0.3.0 series, and has
15868 much fewer changes than the first. If we find no new bugs or
15869 regressions here, the first stable 0.3.0 release will be nearly
15872 o Major bugfixes (crash, directory connections):
15873 - Fix a rare crash when sending a begin cell on a circuit whose
15874 linked directory connection had already been closed. Fixes bug
15875 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
15877 o Major bugfixes (guard selection):
15878 - Fix a guard selection bug where Tor would refuse to bootstrap in
15879 some cases if the user swapped a bridge for another bridge in
15880 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
15881 Reported by "torvlnt33r".
15883 o Minor features (geoip):
15884 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
15887 o Minor bugfix (compilation):
15888 - Fix a warning when compiling hs_service.c. Previously, it had no
15889 exported symbols when compiled for libor.a, resulting in a
15890 compilation warning from clang. Fixes bug 21825; bugfix
15893 o Minor bugfixes (hidden services):
15894 - Make hidden services check for failed intro point connections,
15895 even when they have exceeded their intro point creation limit.
15896 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
15897 - Make hidden services with 8 to 10 introduction points check for
15898 failed circuits immediately after startup. Previously, they would
15899 wait for 5 minutes before performing their first checks. Fixes bug
15900 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
15902 o Minor bugfixes (memory leaks):
15903 - Fix a memory leak when using GETCONF on a port option. Fixes bug
15904 21682; bugfix on 0.3.0.3-alpha.
15906 o Minor bugfixes (relay):
15907 - Avoid a double-marked-circuit warning that could happen when we
15908 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
15911 o Minor bugfixes (tests):
15912 - Run the entry_guard_parse_from_state_full() test with the time set
15913 to a specific date. (The guard state that this test was parsing
15914 contained guards that had expired since the test was first
15915 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
15918 - Update the description of the directory server options in the
15919 manual page, to clarify that a relay no longer needs to set
15920 DirPort in order to be a directory cache. Closes ticket 21720.
15924 Changes in version 0.2.8.13 - 2017-03-03
15925 Tor 0.2.8.13 backports a security fix from later Tor
15926 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
15927 this release, if for some reason they cannot upgrade to a later
15928 release series, and if they build Tor with the --enable-expensive-hardening
15931 Note that support for Tor 0.2.8.x is ending next year: we will not issue
15932 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
15933 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15935 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15936 - Fix an integer underflow bug when comparing malformed Tor
15937 versions. This bug could crash Tor when built with
15938 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15939 0.2.9.8, which were built with -ftrapv by default. In other cases
15940 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15941 on 0.0.8pre1. Found by OSS-Fuzz.
15943 o Minor features (geoip):
15944 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15948 Changes in version 0.2.7.7 - 2017-03-03
15949 Tor 0.2.7.7 backports a number of security fixes from later Tor
15950 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
15951 this release, if for some reason they cannot upgrade to a later
15954 Note that support for Tor 0.2.7.x is ending this year: we will not issue
15955 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
15956 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15958 o Directory authority changes (backport from 0.2.8.5-rc):
15959 - Urras is no longer a directory authority. Closes ticket 19271.
15961 o Directory authority changes (backport from 0.2.9.2-alpha):
15962 - The "Tonga" bridge authority has been retired; the new bridge
15963 authority is "Bifroest". Closes tickets 19728 and 19690.
15965 o Directory authority key updates (backport from 0.2.8.1-alpha):
15966 - Update the V3 identity key for the dannenberg directory authority:
15967 it was changed on 18 November 2015. Closes task 17906. Patch
15970 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15971 - Fix a bug in parsing that could cause clients to read a single
15972 byte past the end of an allocated region. This bug could be used
15973 to cause hardened clients (built with --enable-expensive-hardening)
15974 to crash if they tried to visit a hostile hidden service. Non-
15975 hardened clients are only affected depending on the details of
15976 their platform's memory allocator. Fixes bug 21018; bugfix on
15977 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15978 2016-12-002 and as CVE-2016-1254.
15980 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15981 - Stop a crash that could occur when a client running with DNSPort
15982 received a query with multiple address types, and the first
15983 address type was not supported. Found and fixed by Scott Dial.
15984 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15985 - Prevent a class of security bugs caused by treating the contents
15986 of a buffer chunk as if they were a NUL-terminated string. At
15987 least one such bug seems to be present in all currently used
15988 versions of Tor, and would allow an attacker to remotely crash
15989 most Tor instances, especially those compiled with extra compiler
15990 hardening. With this defense in place, such bugs can't crash Tor,
15991 though we should still fix them as they occur. Closes ticket
15992 20384 (TROVE-2016-10-001).
15994 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15995 - Avoid a difficult-to-trigger heap corruption attack when extending
15996 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15997 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15998 Reported by Guido Vranken.
16000 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16001 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16002 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16004 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16005 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16006 pointer to the previous (uninitialized) key value. The impact here
16007 should be limited to a difficult-to-trigger crash, if OpenSSL is
16008 running an engine that makes key generation failures possible, or
16009 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16010 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16013 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16014 - Fix an integer underflow bug when comparing malformed Tor
16015 versions. This bug could crash Tor when built with
16016 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16017 0.2.9.8, which were built with -ftrapv by default. In other cases
16018 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16019 on 0.0.8pre1. Found by OSS-Fuzz.
16021 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16022 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16023 zero size. Check size argument to memwipe() for underflow. Fixes
16024 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16027 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16028 - Make Tor survive errors involving connections without a
16029 corresponding event object. Previously we'd fail with an
16030 assertion; now we produce a log message. Related to bug 16248.
16032 o Minor features (geoip):
16033 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16037 Changes in version 0.2.6.11 - 2017-03-03
16038 Tor 0.2.6.11 backports a number of security fixes from later Tor
16039 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
16040 this release, if for some reason they cannot upgrade to a later
16043 Note that support for Tor 0.2.6.x is ending this year: we will not issue
16044 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
16045 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16047 o Directory authority changes (backport from 0.2.8.5-rc):
16048 - Urras is no longer a directory authority. Closes ticket 19271.
16050 o Directory authority changes (backport from 0.2.9.2-alpha):
16051 - The "Tonga" bridge authority has been retired; the new bridge
16052 authority is "Bifroest". Closes tickets 19728 and 19690.
16054 o Directory authority key updates (backport from 0.2.8.1-alpha):
16055 - Update the V3 identity key for the dannenberg directory authority:
16056 it was changed on 18 November 2015. Closes task 17906. Patch
16059 o Major features (security fixes, backport from 0.2.9.4-alpha):
16060 - Prevent a class of security bugs caused by treating the contents
16061 of a buffer chunk as if they were a NUL-terminated string. At
16062 least one such bug seems to be present in all currently used
16063 versions of Tor, and would allow an attacker to remotely crash
16064 most Tor instances, especially those compiled with extra compiler
16065 hardening. With this defense in place, such bugs can't crash Tor,
16066 though we should still fix them as they occur. Closes ticket
16067 20384 (TROVE-2016-10-001).
16069 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16070 - Fix a bug in parsing that could cause clients to read a single
16071 byte past the end of an allocated region. This bug could be used
16072 to cause hardened clients (built with --enable-expensive-hardening)
16073 to crash if they tried to visit a hostile hidden service. Non-
16074 hardened clients are only affected depending on the details of
16075 their platform's memory allocator. Fixes bug 21018; bugfix on
16076 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16077 2016-12-002 and as CVE-2016-1254.
16079 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16080 - Stop a crash that could occur when a client running with DNSPort
16081 received a query with multiple address types, and the first
16082 address type was not supported. Found and fixed by Scott Dial.
16083 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16085 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16086 - Fix an error that could cause us to read 4 bytes before the
16087 beginning of an openssl string. This bug could be used to cause
16088 Tor to crash on systems with unusual malloc implementations, or
16089 systems with unusual hardening installed. Fixes bug 17404; bugfix
16092 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16093 - Avoid a difficult-to-trigger heap corruption attack when extending
16094 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16095 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16096 Reported by Guido Vranken.
16098 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16099 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16100 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16102 o Major bugfixes (guard selection, backport from 0.2.7.6):
16103 - Actually look at the Guard flag when selecting a new directory
16104 guard. When we implemented the directory guard design, we
16105 accidentally started treating all relays as if they have the Guard
16106 flag during guard selection, leading to weaker anonymity and worse
16107 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16110 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16111 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16112 pointer to the previous (uninitialized) key value. The impact here
16113 should be limited to a difficult-to-trigger crash, if OpenSSL is
16114 running an engine that makes key generation failures possible, or
16115 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16116 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16119 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16120 - Fix an integer underflow bug when comparing malformed Tor
16121 versions. This bug could crash Tor when built with
16122 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16123 0.2.9.8, which were built with -ftrapv by default. In other cases
16124 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16125 on 0.0.8pre1. Found by OSS-Fuzz.
16127 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16128 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16129 zero size. Check size argument to memwipe() for underflow. Fixes
16130 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16133 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16134 - Make Tor survive errors involving connections without a
16135 corresponding event object. Previously we'd fail with an
16136 assertion; now we produce a log message. Related to bug 16248.
16138 o Minor features (geoip):
16139 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16142 o Minor bugfixes (compilation, backport from 0.2.7.6):
16143 - Fix a compilation warning with Clang 3.6: Do not check the
16144 presence of an address which can never be NULL. Fixes bug 17781.
16147 Changes in version 0.2.5.13 - 2017-03-03
16148 Tor 0.2.5.13 backports a number of security fixes from later Tor
16149 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
16150 this release, if for some reason they cannot upgrade to a later
16153 Note that support for Tor 0.2.5.x is ending next year: we will not issue
16154 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
16155 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
16157 o Directory authority changes (backport from 0.2.8.5-rc):
16158 - Urras is no longer a directory authority. Closes ticket 19271.
16160 o Directory authority changes (backport from 0.2.9.2-alpha):
16161 - The "Tonga" bridge authority has been retired; the new bridge
16162 authority is "Bifroest". Closes tickets 19728 and 19690.
16164 o Directory authority key updates (backport from 0.2.8.1-alpha):
16165 - Update the V3 identity key for the dannenberg directory authority:
16166 it was changed on 18 November 2015. Closes task 17906. Patch
16169 o Major features (security fixes, backport from 0.2.9.4-alpha):
16170 - Prevent a class of security bugs caused by treating the contents
16171 of a buffer chunk as if they were a NUL-terminated string. At
16172 least one such bug seems to be present in all currently used
16173 versions of Tor, and would allow an attacker to remotely crash
16174 most Tor instances, especially those compiled with extra compiler
16175 hardening. With this defense in place, such bugs can't crash Tor,
16176 though we should still fix them as they occur. Closes ticket
16177 20384 (TROVE-2016-10-001).
16179 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16180 - Fix a bug in parsing that could cause clients to read a single
16181 byte past the end of an allocated region. This bug could be used
16182 to cause hardened clients (built with --enable-expensive-hardening)
16183 to crash if they tried to visit a hostile hidden service. Non-
16184 hardened clients are only affected depending on the details of
16185 their platform's memory allocator. Fixes bug 21018; bugfix on
16186 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16187 2016-12-002 and as CVE-2016-1254.
16189 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
16190 - Stop a crash that could occur when a client running with DNSPort
16191 received a query with multiple address types, and the first
16192 address type was not supported. Found and fixed by Scott Dial.
16193 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
16195 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16196 - Fix an error that could cause us to read 4 bytes before the
16197 beginning of an openssl string. This bug could be used to cause
16198 Tor to crash on systems with unusual malloc implementations, or
16199 systems with unusual hardening installed. Fixes bug 17404; bugfix
16202 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16203 - Avoid a difficult-to-trigger heap corruption attack when extending
16204 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16205 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16206 Reported by Guido Vranken.
16208 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16209 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16210 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16212 o Major bugfixes (guard selection, backport from 0.2.7.6):
16213 - Actually look at the Guard flag when selecting a new directory
16214 guard. When we implemented the directory guard design, we
16215 accidentally started treating all relays as if they have the Guard
16216 flag during guard selection, leading to weaker anonymity and worse
16217 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16220 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16221 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16222 pointer to the previous (uninitialized) key value. The impact here
16223 should be limited to a difficult-to-trigger crash, if OpenSSL is
16224 running an engine that makes key generation failures possible, or
16225 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16226 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16229 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16230 - Fix an integer underflow bug when comparing malformed Tor
16231 versions. This bug could crash Tor when built with
16232 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16233 0.2.9.8, which were built with -ftrapv by default. In other cases
16234 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16235 on 0.0.8pre1. Found by OSS-Fuzz.
16237 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16238 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16239 zero size. Check size argument to memwipe() for underflow. Fixes
16240 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16243 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16244 - Make Tor survive errors involving connections without a
16245 corresponding event object. Previously we'd fail with an
16246 assertion; now we produce a log message. Related to bug 16248.
16248 o Minor features (geoip):
16249 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16252 o Minor bugfixes (compilation, backport from 0.2.7.6):
16253 - Fix a compilation warning with Clang 3.6: Do not check the
16254 presence of an address which can never be NULL. Fixes bug 17781.
16256 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
16257 - Check for failures from crypto_early_init, and refuse to continue.
16258 A previous typo meant that we could keep going with an
16259 uninitialized crypto library, and would have OpenSSL initialize
16260 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
16261 when implementing ticket 4900. Patch by "teor".
16263 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16264 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16265 a client authorized hidden service. Fixes bug 15823; bugfix
16269 Changes in version 0.2.4.28 - 2017-03-03
16270 Tor 0.2.4.28 backports a number of security fixes from later Tor
16271 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
16272 this release, if for some reason they cannot upgrade to a later
16275 Note that support for Tor 0.2.4.x is ending soon: we will not issue
16276 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
16277 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
16279 o Directory authority changes (backport from 0.2.8.5-rc):
16280 - Urras is no longer a directory authority. Closes ticket 19271.
16282 o Directory authority changes (backport from 0.2.9.2-alpha):
16283 - The "Tonga" bridge authority has been retired; the new bridge
16284 authority is "Bifroest". Closes tickets 19728 and 19690.
16286 o Directory authority key updates (backport from 0.2.8.1-alpha):
16287 - Update the V3 identity key for the dannenberg directory authority:
16288 it was changed on 18 November 2015. Closes task 17906. Patch
16291 o Major features (security fixes, backport from 0.2.9.4-alpha):
16292 - Prevent a class of security bugs caused by treating the contents
16293 of a buffer chunk as if they were a NUL-terminated string. At
16294 least one such bug seems to be present in all currently used
16295 versions of Tor, and would allow an attacker to remotely crash
16296 most Tor instances, especially those compiled with extra compiler
16297 hardening. With this defense in place, such bugs can't crash Tor,
16298 though we should still fix them as they occur. Closes ticket
16299 20384 (TROVE-2016-10-001).
16301 o Major bugfixes (parsing, security, backport from 0.2.9.8):
16302 - Fix a bug in parsing that could cause clients to read a single
16303 byte past the end of an allocated region. This bug could be used
16304 to cause hardened clients (built with --enable-expensive-hardening)
16305 to crash if they tried to visit a hostile hidden service. Non-
16306 hardened clients are only affected depending on the details of
16307 their platform's memory allocator. Fixes bug 21018; bugfix on
16308 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16309 2016-12-002 and as CVE-2016-1254.
16311 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
16312 - Fix an error that could cause us to read 4 bytes before the
16313 beginning of an openssl string. This bug could be used to cause
16314 Tor to crash on systems with unusual malloc implementations, or
16315 systems with unusual hardening installed. Fixes bug 17404; bugfix
16318 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
16319 - Avoid a difficult-to-trigger heap corruption attack when extending
16320 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
16321 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
16322 Reported by Guido Vranken.
16324 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
16325 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
16326 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
16328 o Major bugfixes (guard selection, backport from 0.2.7.6):
16329 - Actually look at the Guard flag when selecting a new directory
16330 guard. When we implemented the directory guard design, we
16331 accidentally started treating all relays as if they have the Guard
16332 flag during guard selection, leading to weaker anonymity and worse
16333 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16336 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16337 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16338 pointer to the previous (uninitialized) key value. The impact here
16339 should be limited to a difficult-to-trigger crash, if OpenSSL is
16340 running an engine that makes key generation failures possible, or
16341 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16342 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16345 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16346 - Fix an integer underflow bug when comparing malformed Tor
16347 versions. This bug could crash Tor when built with
16348 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16349 0.2.9.8, which were built with -ftrapv by default. In other cases
16350 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16351 on 0.0.8pre1. Found by OSS-Fuzz.
16353 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16354 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16355 zero size. Check size argument to memwipe() for underflow. Fixes
16356 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16359 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16360 - Make Tor survive errors involving connections without a
16361 corresponding event object. Previously we'd fail with an
16362 assertion; now we produce a log message. Related to bug 16248.
16364 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
16365 - Make it harder for attackers to overload hidden services with
16366 introductions, by blocking multiple introduction requests on the
16367 same circuit. Resolves ticket 15515.
16369 o Minor features (geoip):
16370 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16373 o Minor bugfixes (compilation, backport from 0.2.7.6):
16374 - Fix a compilation warning with Clang 3.6: Do not check the
16375 presence of an address which can never be NULL. Fixes bug 17781.
16377 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16378 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16379 a client authorized hidden service. Fixes bug 15823; bugfix
16383 Changes in version 0.3.0.4-rc - 2017-03-01
16384 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
16385 0.3.0 release series, and introduces a few reliability features to
16386 keep them from coming back.
16388 This is the first release candidate in the Tor 0.3.0 series. If we
16389 find no new bugs or regressions here, the first stable 0.3.0 release
16390 will be nearly identical to it.
16392 o Major bugfixes (bridges):
16393 - When the same bridge is configured multiple times with the same
16394 identity, but at different address:port combinations, treat those
16395 bridge instances as separate guards. This fix restores the ability
16396 of clients to configure the same bridge with multiple pluggable
16397 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
16399 o Major bugfixes (hidden service directory v3):
16400 - Stop crashing on a failed v3 hidden service descriptor lookup
16401 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
16403 o Major bugfixes (parsing):
16404 - When parsing a malformed content-length field from an HTTP
16405 message, do not read off the end of the buffer. This bug was a
16406 potential remote denial-of-service attack against Tor clients and
16407 relays. A workaround was released in October 2016, to prevent this
16408 bug from crashing Tor. This is a fix for the underlying issue,
16409 which should no longer matter (if you applied the earlier patch).
16410 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
16411 using AFL (http://lcamtuf.coredump.cx/afl/).
16412 - Fix an integer underflow bug when comparing malformed Tor
16413 versions. This bug could crash Tor when built with
16414 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16415 0.2.9.8, which were built with -ftrapv by default. In other cases
16416 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16417 on 0.0.8pre1. Found by OSS-Fuzz.
16419 o Minor feature (protocol versioning):
16420 - Add new protocol version for proposal 224. HSIntro now advertises
16421 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
16423 o Minor features (directory authorities):
16424 - Directory authorities now reject descriptors that claim to be
16425 malformed versions of Tor. Helps prevent exploitation of
16427 - Reject version numbers with components that exceed INT32_MAX.
16428 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16429 Fixes bug 21450; bugfix on 0.0.8pre1.
16430 - Directory authorities now reject relays running versions
16431 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16432 suffer from bug 20499 and don't keep their consensus cache
16433 up-to-date. Resolves ticket 20509.
16435 o Minor features (geoip):
16436 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16439 o Minor features (reliability, crash):
16440 - Try better to detect problems in buffers where they might grow (or
16441 think they have grown) over 2 GB in size. Diagnostic for
16444 o Minor features (testing):
16445 - During 'make test-network-all', if tor logs any warnings, ask
16446 chutney to output them. Requires a recent version of chutney with
16447 the 21572 patch. Implements 21570.
16449 o Minor bugfixes (certificate expiration time):
16450 - Avoid using link certificates that don't become valid till some
16451 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
16453 o Minor bugfixes (code correctness):
16454 - Repair a couple of (unreachable or harmless) cases of the risky
16455 comparison-by-subtraction pattern that caused bug 21278.
16456 - Remove a redundant check for the UseEntryGuards option from the
16457 options_transition_affects_guards() function. Fixes bug 21492;
16458 bugfix on 0.3.0.1-alpha.
16460 o Minor bugfixes (directory mirrors):
16461 - Allow relays to use directory mirrors without a DirPort: these
16462 relays need to be contacted over their ORPorts using a begindir
16463 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
16464 - Clarify the message logged when a remote relay is unexpectedly
16465 missing an ORPort or DirPort: users were confusing this with a
16466 local port. Fixes another case of bug 20711; bugfix
16469 o Minor bugfixes (guards):
16470 - Don't warn about a missing guard state on timeout-measurement
16471 circuits: they aren't supposed to be using guards. Fixes an
16472 instance of bug 21007; bugfix on 0.3.0.1-alpha.
16473 - Silence a BUG() warning when attempting to use a guard whose
16474 descriptor we don't know, and make this scenario less likely to
16475 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
16477 o Minor bugfixes (hidden service):
16478 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
16479 cells. Previously, we were using sizeof() on a pointer, instead of
16480 the real destination buffer. Fortunately, that value was only used
16481 to double-check that there was enough room--which was already
16482 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
16484 o Minor bugfixes (testing):
16485 - Fix Raspbian build issues related to missing socket errno in
16486 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
16488 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
16489 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
16490 - Use bash in src/test/test-network.sh. This ensures we reliably
16491 call chutney's newer tools/test-network.sh when available. Fixes
16492 bug 21562; bugfix on 0.2.9.1-alpha.
16495 - Small fixes to the fuzzing documentation. Closes ticket 21472.
16498 Changes in version 0.2.9.10 - 2017-03-01
16499 Tor 0.2.9.10 backports a security fix from later Tor release. It also
16500 includes fixes for some major issues affecting directory authorities,
16501 LibreSSL compatibility, and IPv6 correctness.
16503 The Tor 0.2.9.x release series is now marked as a long-term-support
16504 series. We intend to backport security fixes to 0.2.9.x until at
16505 least January of 2020.
16507 o Major bugfixes (directory authority, 0.3.0.3-alpha):
16508 - During voting, when marking a relay as a probable sybil, do not
16509 clear its BadExit flag: sybils can still be bad in other ways
16510 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16513 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
16514 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16515 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16516 exit policy rejects that port on more than an IPv6 /16 of
16517 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16518 which rejected a relay's own IPv6 address by default. Fixes bug
16519 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16521 o Major bugfixes (parsing, also in 0.3.0.4-rc):
16522 - Fix an integer underflow bug when comparing malformed Tor
16523 versions. This bug could crash Tor when built with
16524 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16525 0.2.9.8, which were built with -ftrapv by default. In other cases
16526 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16527 on 0.0.8pre1. Found by OSS-Fuzz.
16529 o Minor features (directory authorities, also in 0.3.0.4-rc):
16530 - Directory authorities now reject descriptors that claim to be
16531 malformed versions of Tor. Helps prevent exploitation of
16533 - Reject version numbers with components that exceed INT32_MAX.
16534 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16535 Fixes bug 21450; bugfix on 0.0.8pre1.
16537 o Minor features (geoip):
16538 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16541 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
16542 - Autoconf now checks to determine if OpenSSL structures are opaque,
16543 instead of explicitly checking for OpenSSL version numbers. Part
16545 - Support building with recent LibreSSL code that uses opaque
16546 structures. Closes ticket 21359.
16548 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
16549 - Repair a couple of (unreachable or harmless) cases of the risky
16550 comparison-by-subtraction pattern that caused bug 21278.
16552 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
16553 - The tor-resolve command line tool now rejects hostnames over 255
16554 characters in length. Previously, it would silently truncate them,
16555 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16556 Patch by "junglefowl".
16559 Changes in version 0.3.0.3-alpha - 2017-02-03
16560 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
16561 0.3.0.x development series, including some that could cause
16562 authorities to behave badly. There is also a fix for a longstanding
16563 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
16564 includes some smaller features and bugfixes.
16566 The Tor 0.3.0.x release series is now in patch-freeze: no additional
16567 features will be considered for inclusion in 0.3.0.x. We suspect that
16568 some bugs will probably remain, however, and we encourage people to
16571 o Major bugfixes (directory authority):
16572 - During voting, when marking a relay as a probable sybil, do not
16573 clear its BadExit flag: sybils can still be bad in other ways
16574 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16576 - When deciding whether we have just found a router to be reachable,
16577 do not penalize it for not having performed an Ed25519 link
16578 handshake if it does not claim to support an Ed25519 handshake.
16579 Previously, we would treat such relays as non-running. Fixes bug
16580 21107; bugfix on 0.3.0.1-alpha.
16582 o Major bugfixes (entry guards):
16583 - Stop trying to build circuits through entry guards for which we
16584 have no descriptor. Also, stop crashing in the case that we *do*
16585 accidentally try to build a circuit in such a state. Fixes bug
16586 21242; bugfix on 0.3.0.1-alpha.
16588 o Major bugfixes (IPv6 Exits):
16589 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16590 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16591 exit policy rejects that port on more than an IPv6 /16 of
16592 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16593 which rejected a relay's own IPv6 address by default. Fixes bug
16594 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16596 o Minor feature (client):
16597 - Enable IPv6 traffic on the SocksPort by default. To disable this,
16598 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
16600 o Minor feature (fallback scripts):
16601 - Add a check_existing mode to updateFallbackDirs.py, which checks
16602 if fallbacks in the hard-coded list are working. Closes ticket
16603 20174. Patch by haxxpop.
16605 o Minor features (ciphersuite selection):
16606 - Clients now advertise a list of ciphersuites closer to the ones
16607 preferred by Firefox. Closes part of ticket 15426.
16608 - Allow relays to accept a wider range of ciphersuites, including
16609 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
16611 o Minor features (controller, configuration):
16612 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
16613 and so on, now comes with a __*Port variant that will not be saved
16614 to the torrc file by the controller's SAVECONF command. This
16615 change allows TorBrowser to set up a single-use domain socket for
16616 each time it launches Tor. Closes ticket 20956.
16617 - The GETCONF command can now query options that may only be
16618 meaningful in context-sensitive lists. This allows the controller
16619 to query the mixed SocksPort/__SocksPort style options introduced
16620 in feature 20956. Implements ticket 21300.
16622 o Minor features (portability, compilation):
16623 - Autoconf now checks to determine if OpenSSL structures are opaque,
16624 instead of explicitly checking for OpenSSL version numbers. Part
16626 - Support building with recent LibreSSL code that uses opaque
16627 structures. Closes ticket 21359.
16629 o Minor features (relay):
16630 - We now allow separation of exit and relay traffic to different
16631 source IP addresses, using the OutboundBindAddressExit and
16632 OutboundBindAddressOR options respectively. Closes ticket 17975.
16633 Written by Michael Sonntag.
16635 o Minor bugfix (logging):
16636 - Don't recommend the use of Tor2web in non-anonymous mode.
16637 Recommending Tor2web is a bad idea because the client loses all
16638 anonymity. Tor2web should only be used in specific cases by users
16639 who *know* and understand the issues. Fixes bug 21294; bugfix
16642 o Minor bugfixes (client):
16643 - Always recover from failures in extend_info_from_node(), in an
16644 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
16645 bugfix on 0.2.3.1-alpha.
16647 o Minor bugfixes (client, entry guards):
16648 - Fix a bug warning (with backtrace) when we fail a channel that
16649 circuits to fallback directories on it. Fixes bug 21128; bugfix
16651 - Fix a spurious bug warning (with backtrace) when removing an
16652 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
16653 - Fix a bug of the new guard algorithm where tor could stall for up
16654 to 10 minutes before retrying a guard after a long period of no
16655 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
16656 - Do not try to build circuits until we have descriptors for our
16657 primary entry guards. Related to fix for bug 21242.
16659 o Minor bugfixes (configure, autoconf):
16660 - Rename the configure option --enable-expensive-hardening to
16661 --enable-fragile-hardening. Expensive hardening makes the tor
16662 daemon abort when some kinds of issues are detected. Thus, it
16663 makes tor more at risk of remote crashes but safer against RCE or
16664 heartbleed bug category. We now try to explain this issue in a
16665 message from the configure script. Fixes bug 21290; bugfix
16668 o Minor bugfixes (controller):
16669 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
16670 20824; bugfix on 0.3.0.1-alpha.
16672 o Minor bugfixes (hidden service):
16673 - Clean up the code for expiring intro points with no associated
16674 circuits. It was causing, rarely, a service with some expiring
16675 introduction points to not open enough additional introduction
16676 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
16677 - Stop setting the torrc option HiddenServiceStatistics to "0" just
16678 because we're not a bridge or relay. Instead, we preserve whatever
16679 value the user set (or didn't set). Fixes bug 21150; bugfix
16681 - Resolve two possible underflows which could lead to creating and
16682 closing a lot of introduction point circuits in a non-stop loop.
16683 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
16685 o Minor bugfixes (portability):
16686 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
16687 It is supported by OpenBSD itself, and also by most OpenBSD
16688 variants (such as Bitrig). Fixes bug 20980; bugfix
16690 - When mapping a file of length greater than SIZE_MAX, do not
16691 silently truncate its contents. This issue could occur on 32 bit
16692 systems with large file support and files which are larger than 4
16693 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
16695 o Minor bugfixes (tor-resolve):
16696 - The tor-resolve command line tool now rejects hostnames over 255
16697 characters in length. Previously, it would silently truncate them,
16698 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16699 Patch by "junglefowl".
16701 o Minor bugfixes (Windows services):
16702 - Be sure to initialize the monotonic time subsystem before using
16703 it, even when running as an NT service. Fixes bug 21356; bugfix
16707 Changes in version 0.3.0.2-alpha - 2017-01-23
16708 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
16709 cause relays and clients to crash, even if they were not built with
16710 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16711 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16712 version should upgrade.
16714 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
16715 time-to-live values, makes directory authorities enforce the 1-to-1
16716 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
16717 client-side onion service reachability bug, does better at selecting
16718 the set of fallback directories, and more.
16720 o Major bugfixes (security, also in 0.2.9.9):
16721 - Downgrade the "-ftrapv" option from "always on" to "only on when
16722 --enable-expensive-hardening is provided." This hardening option, like
16723 others, can turn survivable bugs into crashes--and having it on by
16724 default made a (relatively harmless) integer overflow bug into a
16725 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
16728 o Major features (security):
16729 - Change the algorithm used to decide DNS TTLs on client and server
16730 side, to better resist DNS-based correlation attacks like the
16731 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
16732 Feamster. Now relays only return one of two possible DNS TTL
16733 values, and clients are willing to believe DNS TTL values up to 3
16734 hours long. Closes ticket 19769.
16736 o Major features (directory authority, security):
16737 - The default for AuthDirPinKeys is now 1: directory authorities
16738 will reject relays where the RSA identity key matches a previously
16739 seen value, but the Ed25519 key has changed. Closes ticket 18319.
16741 o Major bugfixes (client, guard, crash):
16742 - In circuit_get_global_origin_list(), return the actual list of
16743 origin circuits. The previous version of this code returned the
16744 list of all the circuits, and could have caused strange bugs,
16745 including possible crashes. Fixes bug 21118; bugfix
16748 o Major bugfixes (client, onion service, also in 0.2.9.9):
16749 - Fix a client-side onion service reachability bug, where multiple
16750 socks requests to an onion service (or a single slow request)
16751 could cause us to mistakenly mark some of the service's
16752 introduction points as failed, and we cache that failure so
16753 eventually we run out and can't reach the service. Also resolves a
16754 mysterious "Remote server sent bogus reason code 65021" log
16755 warning. The bug was introduced in ticket 17218, where we tried to
16756 remember the circuit end reason as a uint16_t, which mangled
16757 negative values. Partially fixes bug 21056 and fixes bug 20307;
16758 bugfix on 0.2.8.1-alpha.
16760 o Major bugfixes (DNS):
16761 - Fix a bug that prevented exit nodes from caching DNS records for
16762 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
16764 o Minor features (controller):
16765 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
16766 shared-random values to the controller. Closes ticket 19925.
16768 o Minor features (entry guards):
16769 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
16770 break regression tests.
16771 - Require UseEntryGuards when UseBridges is set, in order to make
16772 sure bridges aren't bypassed. Resolves ticket 20502.
16774 o Minor features (fallback directories):
16775 - Select 200 fallback directories for each release. Closes
16777 - Allow 3 fallback relays per operator, which is safe now that we
16778 are choosing 200 fallback relays. Closes ticket 20912.
16779 - Exclude relays affected by bug 20499 from the fallback list.
16780 Exclude relays from the fallback list if they are running versions
16781 known to be affected by bug 20499, or if in our tests they deliver
16782 a stale consensus (i.e. one that expired more than 24 hours ago).
16783 Closes ticket 20539.
16784 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
16786 - Require fallback directories to have the same address and port for
16787 7 days (now that we have enough relays with this stability).
16788 Relays whose OnionOO stability timer is reset on restart by bug
16789 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
16790 this issue. Closes ticket 20880; maintains short-term fix
16792 - Require fallbacks to have flags for 90% of the time (weighted
16793 decaying average), rather than 95%. This allows at least 73% of
16794 clients to bootstrap in the first 5 seconds without contacting an
16795 authority. Part of ticket 18828.
16796 - Annotate updateFallbackDirs.py with the bandwidth and consensus
16797 weight for each candidate fallback. Closes ticket 20878.
16798 - Make it easier to change the output sort order of fallbacks.
16799 Closes ticket 20822.
16800 - Display the relay fingerprint when downloading consensuses from
16801 fallbacks. Closes ticket 20908.
16803 o Minor features (geoip, also in 0.2.9.9):
16804 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16807 o Minor features (next-gen onion service directories):
16808 - Remove the "EnableOnionServicesV3" consensus parameter that we
16809 introduced in 0.3.0.1-alpha: relays are now always willing to act
16810 as v3 onion service directories. Resolves ticket 19899.
16812 o Minor features (linting):
16813 - Enhance the changes file linter to warn on Tor versions that are
16814 prefixed with "tor-". Closes ticket 21096.
16816 o Minor features (logging):
16817 - In several places, describe unset ed25519 keys as "<unset>",
16818 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
16820 o Minor bugfix (control protocol):
16821 - The reply to a "GETINFO config/names" request via the control
16822 protocol now spells the type "Dependent" correctly. This is a
16823 breaking change in the control protocol. (The field seems to be
16824 ignored by the most common known controllers.) Fixes bug 18146;
16825 bugfix on 0.1.1.4-alpha.
16827 o Minor bugfixes (bug resilience):
16828 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
16829 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
16830 Hans Jerry Illikainen.
16832 o Minor bugfixes (build):
16833 - Replace obsolete Autoconf macros with their modern equivalent and
16834 prevent similar issues in the future. Fixes bug 20990; bugfix
16837 o Minor bugfixes (client, guards):
16838 - Fix bug where Tor would think that there are circuits waiting for
16839 better guards even though those circuits have been freed. Fixes
16840 bug 21142; bugfix on 0.3.0.1-alpha.
16842 o Minor bugfixes (config):
16843 - Don't assert on startup when trying to get the options list and
16844 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
16845 options so of course they aren't ready yet. Fixes bug 21062;
16846 bugfix on 0.2.9.3-alpha.
16848 o Minor bugfixes (controller):
16849 - Make the GETINFO interface for inquiring about entry guards
16850 support the new guards backend. Fixes bug 20823; bugfix
16853 o Minor bugfixes (dead code):
16854 - Remove a redundant check for PidFile changes at runtime in
16855 options_transition_allowed(): this check is already performed
16856 regardless of whether the sandbox is active. Fixes bug 21123;
16857 bugfix on 0.2.5.4-alpha.
16859 o Minor bugfixes (documentation):
16860 - Update the tor manual page to document every option that can not
16861 be changed while tor is running. Fixes bug 21122.
16863 o Minor bugfixes (fallback directories):
16864 - Stop failing when a relay has no uptime data in
16865 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
16866 - Avoid checking fallback candidates' DirPorts if they are down in
16867 OnionOO. When a relay operator has multiple relays, this
16868 prioritizes relays that are up over relays that are down. Fixes
16869 bug 20926; bugfix on 0.2.8.3-alpha.
16870 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
16871 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
16873 o Minor bugfixes (guards, bootstrapping):
16874 - When connecting to a directory guard during bootstrap, do not mark
16875 the guard as successful until we receive a good-looking directory
16876 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
16878 o Minor bugfixes (onion services):
16879 - Fix the config reload pruning of old vs new services so it
16880 actually works when both ephemeral and non-ephemeral services are
16881 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
16882 - Allow the number of introduction points to be as low as 0, rather
16883 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
16885 o Minor bugfixes (IPv6):
16886 - Make IPv6-using clients try harder to find an IPv6 directory
16887 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
16888 - When IPv6 addresses have not been downloaded yet (microdesc
16889 consensus documents don't list relay IPv6 addresses), use hard-
16890 coded addresses for authorities, fallbacks, and configured
16891 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
16892 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
16894 o Minor bugfixes (memory leaks):
16895 - Fix a memory leak when configuring hidden services. Fixes bug
16896 20987; bugfix on 0.3.0.1-alpha.
16898 o Minor bugfixes (portability, also in 0.2.9.9):
16899 - Avoid crashing when Tor is built using headers that contain
16900 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
16901 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
16903 - Fix Libevent detection on platforms without Libevent 1 headers
16904 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
16906 o Minor bugfixes (relay):
16907 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
16908 initializing the keys would reset the DataDirectory to 0700
16909 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
16910 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
16912 o Minor bugfixes (testing):
16913 - Remove undefined behavior from the backtrace generator by removing
16914 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
16916 o Minor bugfixes (unit tests):
16917 - Allow the unit tests to pass even when DNS lookups of bogus
16918 addresses do not fail as expected. Fixes bug 20862 and 20863;
16919 bugfix on unit tests introduced in 0.2.8.1-alpha
16920 through 0.2.9.4-alpha.
16922 o Code simplification and refactoring:
16923 - Refactor code to manipulate global_origin_circuit_list into
16924 separate functions. Closes ticket 20921.
16926 o Documentation (formatting):
16927 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
16928 blocks were incorrectly appearing. Closes ticket 20885.
16930 o Documentation (man page):
16931 - Clarify many options in tor.1 and add some min/max values for
16932 HiddenService options. Closes ticket 21058.
16935 Changes in version 0.2.9.9 - 2017-01-23
16936 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
16937 cause relays and clients to crash, even if they were not built with
16938 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16939 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16940 version should upgrade.
16942 This release also resolves a client-side onion service reachability
16943 bug, and resolves a pair of small portability issues.
16945 o Major bugfixes (security):
16946 - Downgrade the "-ftrapv" option from "always on" to "only on when
16947 --enable-expensive-hardening is provided." This hardening option,
16948 like others, can turn survivable bugs into crashes -- and having
16949 it on by default made a (relatively harmless) integer overflow bug
16950 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
16951 bugfix on 0.2.9.1-alpha.
16953 o Major bugfixes (client, onion service):
16954 - Fix a client-side onion service reachability bug, where multiple
16955 socks requests to an onion service (or a single slow request)
16956 could cause us to mistakenly mark some of the service's
16957 introduction points as failed, and we cache that failure so
16958 eventually we run out and can't reach the service. Also resolves a
16959 mysterious "Remote server sent bogus reason code 65021" log
16960 warning. The bug was introduced in ticket 17218, where we tried to
16961 remember the circuit end reason as a uint16_t, which mangled
16962 negative values. Partially fixes bug 21056 and fixes bug 20307;
16963 bugfix on 0.2.8.1-alpha.
16965 o Minor features (geoip):
16966 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16969 o Minor bugfixes (portability):
16970 - Avoid crashing when Tor is built using headers that contain
16971 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
16972 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
16974 - Fix Libevent detection on platforms without Libevent 1 headers
16975 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
16978 Changes in version 0.3.0.1-alpha - 2016-12-19
16979 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
16980 series. It strengthens Tor's link and circuit handshakes by
16981 identifying relays by their Ed25519 keys, improves the algorithm that
16982 clients use to choose and maintain their list of guards, and includes
16983 additional backend support for the next-generation hidden service
16984 design. It also contains numerous other small features and
16985 improvements to security, correctness, and performance.
16987 Below are the changes since 0.2.9.8.
16989 o Major features (guard selection algorithm):
16990 - Tor's guard selection algorithm has been redesigned from the
16991 ground up, to better support unreliable networks and restrictive
16992 sets of entry nodes, and to better resist guard-capture attacks by
16993 hostile local networks. Implements proposal 271; closes
16996 o Major features (next-generation hidden services):
16997 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
16998 prop224 aka "Next Generation Hidden Services". Service and clients
16999 don't use this functionality yet. Closes ticket 19043. Based on
17000 initial code by Alec Heifetz.
17001 - Relays now support the HSDir version 3 protocol, so that they can
17002 can store and serve v3 descriptors. This is part of the next-
17003 generation onion service work detailed in proposal 224. Closes
17006 o Major features (protocol, ed25519 identity keys):
17007 - Relays now use Ed25519 to prove their Ed25519 identities and to
17008 one another, and to clients. This algorithm is faster and more
17009 secure than the RSA-based handshake we've been doing until now.
17010 Implements the second big part of proposal 220; Closes
17012 - Clients now support including Ed25519 identity keys in the EXTEND2
17013 cells they generate. By default, this is controlled by a consensus
17014 parameter, currently disabled. You can turn this feature on for
17015 testing by setting ExtendByEd25519ID in your configuration. This
17016 might make your traffic appear different than the traffic
17017 generated by other users, however. Implements part of ticket
17018 15056; part of proposal 220.
17019 - Relays now understand requests to extend to other relays by their
17020 Ed25519 identity keys. When an Ed25519 identity key is included in
17021 an EXTEND2 cell, the relay will only extend the circuit if the
17022 other relay can prove ownership of that identity. Implements part
17023 of ticket 15056; part of proposal 220.
17025 o Major bugfixes (scheduler):
17026 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
17027 caused the channel scheduler to behave more or less randomly,
17028 rather than preferring channels with higher-priority circuits.
17029 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
17031 o Minor features (controller):
17032 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
17033 rather than "unrecognized." Closes ticket 20389; patch from
17036 o Minor features (diagnostic, directory client):
17037 - Warn when we find an unexpected inconsistency in directory
17038 download status objects. Prevents some negative consequences of
17041 o Minor features (directory authority):
17042 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
17043 default) to control whether authorities should try to probe relays
17044 by their Ed25519 link keys. This option will go away in a few
17045 releases--unless we encounter major trouble in our ed25519 link
17046 protocol rollout, in which case it will serve as a safety option.
17048 o Minor features (directory cache):
17049 - Relays and bridges will now refuse to serve the consensus they
17050 have if they know it is too old for a client to use. Closes
17053 o Minor features (ed25519 link handshake):
17054 - Advertise support for the ed25519 link handshake using the
17055 subprotocol-versions mechanism, so that clients can tell which
17056 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
17058 o Minor features (fingerprinting resistance, authentication):
17059 - Extend the length of RSA keys used for TLS link authentication to
17060 2048 bits. (These weren't used for forward secrecy; for forward
17061 secrecy, we used P256.) Closes ticket 13752.
17063 o Minor features (infrastructure):
17064 - Implement smartlist_add_strdup() function. Replaces the use of
17065 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
17067 o Minor bugfixes (client):
17068 - When clients that use bridges start up with a cached consensus on
17069 disk, they were ignoring it and downloading a new one. Now they
17070 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
17072 o Minor bugfixes (configuration):
17073 - Accept non-space whitespace characters after the severity level in
17074 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
17075 - Support "TByte" and "TBytes" units in options given in bytes.
17076 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
17077 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
17079 o Minor bugfixes (consensus weight):
17080 - Add new consensus method that initializes bw weights to 1 instead
17081 of 0. This prevents a zero weight from making it all the way to
17082 the end (happens in small testing networks) and causing an error.
17083 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
17085 o Minor bugfixes (descriptors):
17086 - Correctly recognise downloaded full descriptors as valid, even
17087 when using microdescriptors as circuits. This affects clients with
17088 FetchUselessDescriptors set, and may affect directory authorities.
17089 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
17091 o Minor bugfixes (directory system):
17092 - Download all consensus flavors, descriptors, and authority
17093 certificates when FetchUselessDescriptors is set, regardless of
17094 whether tor is a directory cache or not. Fixes bug 20667; bugfix
17095 on all recent tor versions.
17096 - Bridges and relays now use microdescriptors (like clients do)
17097 rather than old-style router descriptors. Now bridges will blend
17098 in with clients in terms of the circuits they build. Fixes bug
17099 6769; bugfix on 0.2.3.2-alpha.
17101 o Minor bugfixes (ed25519 certificates):
17102 - Correctly interpret ed25519 certificates that would expire some
17103 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
17105 o Minor bugfixes (hidden services):
17106 - Stop ignoring misconfigured hidden services. Instead, refuse to
17107 start tor until the misconfigurations have been corrected. Fixes
17108 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
17111 o Minor bugfixes (memory leak at exit):
17112 - Fix a small harmless memory leak at exit of the previously unused
17113 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
17116 o Minor bugfixes (util):
17117 - When finishing writing a file to disk, if we were about to replace
17118 the file with the temporary file created before and we fail to
17119 replace it, remove the temporary file so it doesn't stay on disk.
17120 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
17122 o Minor bugfixes (Windows):
17123 - Check for getpagesize before using it to mmap files. This fixes
17124 compilation in some MinGW environments. Fixes bug 20530; bugfix on
17125 0.1.2.1-alpha. Reported by "ice".
17127 o Code simplification and refactoring:
17128 - Abolish all global guard context in entrynodes.c; replace with new
17129 guard_selection_t structure as preparation for proposal 271.
17130 Closes ticket 19858.
17131 - Introduce rend_service_is_ephemeral() that tells if given onion
17132 service is ephemeral. Replace unclear NULL-checkings for service
17133 directory with this function. Closes ticket 20526.
17134 - Extract magic numbers in circuituse.c into defined variables.
17135 - Refactor circuit_is_available_for_use to remove unnecessary check.
17136 - Refactor circuit_predict_and_launch_new for readability and
17137 testability. Closes ticket 18873.
17138 - Refactor large if statement in purpose_needs_anonymity to use
17139 switch statement instead. Closes part of ticket 20077.
17140 - Refactor the hashing API to return negative values for errors, as
17141 is done as throughout the codebase. Closes ticket 20717.
17142 - Remove data structures that were used to index or_connection
17143 objects by their RSA identity digests. These structures are fully
17144 redundant with the similar structures used in the
17145 channel abstraction.
17146 - Remove duplicate code in the channel_write_*cell() functions.
17147 Closes ticket 13827; patch from Pingl.
17148 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
17149 use only purpose_needs_anonymity. Closes part of ticket 20077.
17150 - The code to generate and parse EXTEND and EXTEND2 cells has been
17151 replaced with code automatically generated by the
17155 - Include the "TBits" unit in Tor's man page. Fixes part of bug
17156 20622; bugfix on 0.2.5.1-alpha.
17157 - Change '1' to 'weight_scale' in consensus bw weights calculation
17158 comments, as that is reality. Closes ticket 20273. Patch
17160 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
17161 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
17163 - Stop the man page from incorrectly stating that HiddenServiceDir
17164 must already exist. Fixes 20486.
17165 - Clarify that when ClientRejectInternalAddresses is enabled (which
17166 is the default), multicast DNS hostnames for machines on the local
17167 network (of the form *.local) are also rejected. Closes
17170 o Removed features:
17171 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
17172 limit for relays running on a single IP applies to authority IP
17173 addresses as well as to non-authority IP addresses. Closes
17175 - The UseDirectoryGuards torrc option no longer exists: all users
17176 that use entry guards will also use directory guards. Related to
17177 proposal 271; implements part of ticket 20831.
17180 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
17181 from "overcaffeinated".
17182 - Perform the coding style checks when running the tests and fail
17183 when coding style violations are found. Closes ticket 5500.
17184 - Add tests for networkstatus_compute_bw_weights_v10.
17185 - Add unit tests circuit_predict_and_launch_new.
17186 - Extract dummy_origin_circuit_new so it can be used by other
17190 Changes in version 0.2.8.12 - 2016-12-19
17191 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
17192 below) where Tor clients could crash when attempting to visit a
17193 hostile hidden service. Clients are recommended to upgrade as packages
17194 become available for their systems.
17196 It also includes an updated list of fallback directories, backported
17199 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
17200 backported to 0.2.8 in the future.
17202 o Major bugfixes (parsing, security, backported from 0.2.9.8):
17203 - Fix a bug in parsing that could cause clients to read a single
17204 byte past the end of an allocated region. This bug could be used
17205 to cause hardened clients (built with --enable-expensive-hardening)
17206 to crash if they tried to visit a hostile hidden service. Non-
17207 hardened clients are only affected depending on the details of
17208 their platform's memory allocator. Fixes bug 21018; bugfix on
17209 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17210 2016-12-002 and as CVE-2016-1254.
17212 o Minor features (fallback directory list, backported from 0.2.9.8):
17213 - Replace the 81 remaining fallbacks of the 100 originally
17214 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17215 fallbacks (123 new, 54 existing, 27 removed) generated in December
17216 2016. Resolves ticket 20170.
17218 o Minor features (geoip, backported from 0.2.9.7-rc):
17219 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17223 Changes in version 0.2.9.8 - 2016-12-19
17224 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
17226 The Tor 0.2.9 series makes mandatory a number of security features
17227 that were formerly optional. It includes support for a new shared-
17228 randomness protocol that will form the basis for next generation
17229 hidden services, includes a single-hop hidden service mode for
17230 optimizing .onion services that don't actually want to be hidden,
17231 tries harder not to overload the directory authorities with excessive
17232 downloads, and supports a better protocol versioning scheme for
17233 improved compatibility with other implementations of the Tor protocol.
17235 And of course, there are numerous other bugfixes and improvements.
17237 This release also includes a fix for a medium-severity issue (bug
17238 21018 below) where Tor clients could crash when attempting to visit a
17239 hostile hidden service. Clients are recommended to upgrade as packages
17240 become available for their systems.
17242 Below are the changes since 0.2.9.7-rc. For a list of all changes
17243 since 0.2.8, see the ReleaseNotes file.
17245 o Major bugfixes (parsing, security):
17246 - Fix a bug in parsing that could cause clients to read a single
17247 byte past the end of an allocated region. This bug could be used
17248 to cause hardened clients (built with --enable-expensive-hardening)
17249 to crash if they tried to visit a hostile hidden service. Non-
17250 hardened clients are only affected depending on the details of
17251 their platform's memory allocator. Fixes bug 21018; bugfix on
17252 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
17253 2016-12-002 and as CVE-2016-1254.
17255 o Minor features (fallback directory list):
17256 - Replace the 81 remaining fallbacks of the 100 originally
17257 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
17258 fallbacks (123 new, 54 existing, 27 removed) generated in December
17259 2016. Resolves ticket 20170.
17262 Changes in version 0.2.9.7-rc - 2016-12-12
17263 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
17264 including a few that had prevented tests from passing on
17267 o Minor features (geoip):
17268 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
17271 o Minor bugfix (build):
17272 - The current Git revision when building from a local repository is
17273 now detected correctly when using git worktrees. Fixes bug 20492;
17274 bugfix on 0.2.3.9-alpha.
17276 o Minor bugfixes (directory authority):
17277 - When computing old Tor protocol line version in protover, we were
17278 looking at 0.2.7.5 twice instead of a specific case for
17279 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
17281 o Minor bugfixes (download scheduling):
17282 - Resolve a "bug" warning when considering a download schedule whose
17283 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
17285 o Minor bugfixes (logging):
17286 - Downgrade a harmless log message about the
17287 pending_entry_connections list from "warn" to "info". Mitigates
17290 o Minor bugfixes (memory leak):
17291 - Fix a small memory leak when receiving AF_UNIX connections on a
17292 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
17293 - When moving a signed descriptor object from a source to an
17294 existing destination, free the allocated memory inside that
17295 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
17297 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
17298 - Fix a memory leak and use-after-free error when removing entries
17299 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
17300 0.2.5.5-alpha. Patch from "cypherpunks".
17302 o Minor bugfixes (portability):
17303 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
17304 Fixes bug 20935; bugfix on 0.2.9.6-rc.
17306 o Minor bugfixes (unit tests):
17307 - Stop expecting NetBSD unit tests to report success for ipfw. Part
17308 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
17309 - Fix tolerances in unit tests for monotonic time comparisons
17310 between nanoseconds and microseconds. Previously, we accepted a 10
17311 us difference only, which is not realistic on every platform's
17312 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
17313 - Remove a double-free in the single onion service unit test. Stop
17314 ignoring a return value. Make future changes less error-prone.
17315 Fixes bug 20864; bugfix on 0.2.9.6-rc.
17318 Changes in version 0.2.8.11 - 2016-12-08
17319 Tor 0.2.8.11 backports fixes for additional portability issues that
17320 could prevent Tor from building correctly on OSX Sierra, or with
17321 OpenSSL 1.1. Affected users should upgrade; others can safely stay
17324 o Minor bugfixes (portability):
17325 - Avoid compilation errors when building on OSX Sierra. Sierra began
17326 to support the getentropy() and clock_gettime() APIs, but created
17327 a few problems in doing so. Tor 0.2.9 has a more thorough set of
17328 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17329 monotonic time interfaces. Fixes bug 20865. Bugfix
17332 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17333 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17334 architectures. Closes ticket 20588.
17337 Changes in version 0.2.8.10 - 2016-12-02
17338 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17339 unusable after they left standby mode. It also backports fixes for
17340 a few portability issues and a small but problematic memory leak.
17342 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17343 - When Tor leaves standby because of a new application request, open
17344 circuits as needed to serve that request. Previously, we would
17345 potentially wait a very long time. Fixes part of bug 19969; bugfix
17348 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
17349 - Clients now respond to new application stream requests immediately
17350 when they arrive, rather than waiting up to one second before
17351 starting to handle them. Fixes part of bug 19969; bugfix
17354 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
17355 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17356 successfully targeting earlier versions of OSX. Resolves
17359 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17360 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17361 20551; bugfix on 0.2.1.1-alpha.
17363 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
17364 - Work around a memory leak in OpenSSL 1.1 when encoding public
17365 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17367 o Minor features (geoip):
17368 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17371 Changes in version 0.2.9.6-rc - 2016-12-02
17372 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
17373 version. We hope that it will be ready to become stable soon, and we
17374 encourage everyone to test this release. If no showstopper bugs are
17375 found here, the next 0.2.9 release will be stable.
17377 o Major bugfixes (relay, resolver, logging):
17378 - For relays that don't know their own address, avoid attempting a
17379 local hostname resolve for each descriptor we download. This
17380 will cut down on the number of "Success: chose address 'x.x.x.x'"
17381 log lines, and also avoid confusing clock jumps if the resolver
17382 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
17384 o Minor bugfixes (client, fascistfirewall):
17385 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
17386 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
17388 o Minor bugfixes (hidden services):
17389 - Stop ignoring the anonymity status of saved keys for hidden
17390 services and single onion services when first starting tor.
17391 Instead, refuse to start tor if any hidden service key has been
17392 used in a different hidden service anonymity mode. Fixes bug
17393 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
17395 o Minor bugfixes (portability):
17396 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17397 successfully targeting earlier versions of OSX. Resolves
17399 - Run correctly when built on Windows build environments that
17400 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
17402 o Minor bugfixes (single onion services, Tor2web):
17403 - Stop complaining about long-term one-hop circuits deliberately
17404 created by single onion services and Tor2web. These log messages
17405 are intended to diagnose issue 8387, which relates to circuits
17406 hanging around forever for no reason. Fixes bug 20613; bugfix on
17407 0.2.9.1-alpha. Reported by "pastly".
17409 o Minor bugfixes (unit tests):
17410 - Stop spurious failures in the local interface address discovery
17411 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
17415 - Correct the minimum bandwidth value in torrc.sample, and queue a
17416 corresponding change for torrc.minimal. Closes ticket 20085.
17419 Changes in version 0.2.9.5-alpha - 2016-11-08
17420 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
17421 version. We believe one or two probably remain, and we encourage
17422 everyone to test this release.
17424 o Major bugfixes (client performance):
17425 - Clients now respond to new application stream requests immediately
17426 when they arrive, rather than waiting up to one second before
17427 starting to handle them. Fixes part of bug 19969; bugfix
17430 o Major bugfixes (client reliability):
17431 - When Tor leaves standby because of a new application request, open
17432 circuits as needed to serve that request. Previously, we would
17433 potentially wait a very long time. Fixes part of bug 19969; bugfix
17436 o Major bugfixes (download scheduling):
17437 - When using an exponential backoff schedule, do not give up on
17438 downloading just because we have failed a bunch of times. Since
17439 each delay is longer than the last, retrying indefinitely won't
17440 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
17441 - If a consensus expires while we are waiting for certificates to
17442 download, stop waiting for certificates.
17443 - If we stop waiting for certificates less than a minute after we
17444 started downloading them, do not consider the certificate download
17445 failure a separate failure. Fixes bug 20533; bugfix
17447 - Remove the maximum delay on exponential-backoff scheduling. Since
17448 we now allow an infinite number of failures (see ticket 20536), we
17449 must now allow the time to grow longer on each failure. Fixes part
17450 of bug 20534; bugfix on 0.2.9.1-alpha.
17451 - Make our initial download delays closer to those from 0.2.8. Fixes
17452 another part of bug 20534; bugfix on 0.2.9.1-alpha.
17453 - When determining when to download a directory object, handle times
17454 after 2038 if the operating system supports them. (Someday this
17455 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
17456 - When using exponential backoff in test networks, use a lower
17457 exponent, so the delays do not vary as much. This helps test
17458 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
17460 o Minor features (geoip):
17461 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17464 o Minor bugfixes (client directory scheduling):
17465 - Treat "relay too busy to answer request" as a failed request and a
17466 reason to back off on our retry frequency. This is safe now that
17467 exponential backoffs retry indefinitely, and avoids a bug where we
17468 would reset our download schedule erroneously. Fixes bug 20593;
17469 bugfix on 0.2.9.1-alpha.
17471 o Minor bugfixes (client, logging):
17472 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
17473 assume all nodes support EXTEND2. Use ntor whenever a key is
17474 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
17475 - On DNSPort, stop logging a BUG warning on a failed hostname
17476 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
17478 o Minor bugfixes (hidden services):
17479 - When configuring hidden services, check every hidden service
17480 directory's permissions. Previously, we only checked the last
17481 hidden service. Fixes bug 20529; bugfix the work to fix 13942
17484 o Minor bugfixes (portability):
17485 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17486 architectures. Closes ticket 20588.
17487 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
17488 removed the ECDH ciphers which caused the tests to fail on
17489 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
17490 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17491 20551; bugfix on 0.2.1.1-alpha.
17493 o Minor bugfixes (relay bootstrap):
17494 - Ensure relays don't make multiple connections during bootstrap.
17495 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
17497 o Minor bugfixes (relay):
17498 - Work around a memory leak in OpenSSL 1.1 when encoding public
17499 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17500 - Avoid a small memory leak when informing worker threads about
17501 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
17502 - Do not try to parallelize workers more than 16x without the user
17503 explicitly configuring us to do so, even if we do detect more than
17504 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17506 o Minor bugfixes (single onion services):
17507 - Start correctly when creating a single onion service in a
17508 directory that did not previously exist. Fixes bug 20484; bugfix
17511 o Minor bugfixes (testing):
17512 - Avoid a unit test failure on systems with over 16 detectable CPU
17513 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17516 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
17517 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
17518 - Module-level documentation for several more modules. Closes
17519 tickets 19287 and 19290.
17522 Changes in version 0.2.8.9 - 2016-10-17
17523 Tor 0.2.8.9 backports a fix for a security hole in previous versions
17524 of Tor that would allow a remote attacker to crash a Tor client,
17525 hidden service, relay, or authority. All Tor users should upgrade to
17526 this version, or to 0.2.9.4-alpha. Patches will be released for older
17529 o Major features (security fixes, also in 0.2.9.4-alpha):
17530 - Prevent a class of security bugs caused by treating the contents
17531 of a buffer chunk as if they were a NUL-terminated string. At
17532 least one such bug seems to be present in all currently used
17533 versions of Tor, and would allow an attacker to remotely crash
17534 most Tor instances, especially those compiled with extra compiler
17535 hardening. With this defense in place, such bugs can't crash Tor,
17536 though we should still fix them as they occur. Closes ticket
17537 20384 (TROVE-2016-10-001).
17539 o Minor features (geoip):
17540 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17544 Changes in version 0.2.9.4-alpha - 2016-10-17
17545 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
17546 that would allow a remote attacker to crash a Tor client, hidden
17547 service, relay, or authority. All Tor users should upgrade to this
17548 version, or to 0.2.8.9. Patches will be released for older versions
17551 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
17552 previous versions of Tor, including the implementation of a feature to
17553 future- proof the Tor ecosystem against protocol changes, some bug
17554 fixes necessary for Tor Browser to use unix domain sockets correctly,
17555 and several portability improvements. We anticipate that this will be
17556 the last alpha in the Tor 0.2.9 series, and that the next release will
17557 be a release candidate.
17559 o Major features (security fixes):
17560 - Prevent a class of security bugs caused by treating the contents
17561 of a buffer chunk as if they were a NUL-terminated string. At
17562 least one such bug seems to be present in all currently used
17563 versions of Tor, and would allow an attacker to remotely crash
17564 most Tor instances, especially those compiled with extra compiler
17565 hardening. With this defense in place, such bugs can't crash Tor,
17566 though we should still fix them as they occur. Closes ticket
17567 20384 (TROVE-2016-10-001).
17569 o Major features (subprotocol versions):
17570 - Tor directory authorities now vote on a set of recommended
17571 subprotocol versions, and on a set of required subprotocol
17572 versions. Clients and relays that lack support for a _required_
17573 subprotocol version will not start; those that lack support for a
17574 _recommended_ subprotocol version will warn the user to upgrade.
17575 Closes ticket 19958; implements part of proposal 264.
17576 - Tor now uses "subprotocol versions" to indicate compatibility.
17577 Previously, versions of Tor looked at the declared Tor version of
17578 a relay to tell whether they could use a given feature. Now, they
17579 should be able to rely on its declared subprotocol versions. This
17580 change allows compatible implementations of the Tor protocol(s) to
17581 exist without pretending to be 100% bug-compatible with particular
17582 releases of Tor itself. Closes ticket 19958; implements part of
17585 o Minor feature (fallback directories):
17586 - Remove broken fallbacks from the hard-coded fallback directory
17587 list. Closes ticket 20190; patch by teor.
17589 o Minor features (client, directory):
17590 - Since authorities now omit all routers that lack the Running and
17591 Valid flags, we assume that any relay listed in the consensus must
17592 have those flags. Closes ticket 20001; implements part of
17595 o Minor features (compilation, portability):
17596 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
17599 o Minor features (development tools, etags):
17600 - Teach the "make tags" Makefile target how to correctly find
17601 "MOCK_IMPL" function definitions. Patch from nherring; closes
17604 o Minor features (geoip):
17605 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17608 o Minor features (unix domain sockets):
17609 - When configuring a unix domain socket for a SocksPort,
17610 ControlPort, or Hidden service, you can now wrap the address in
17611 quotes, using C-style escapes inside the quotes. This allows unix
17612 domain socket paths to contain spaces.
17614 o Minor features (virtual addresses):
17615 - Increase the maximum number of bits for the IPv6 virtual network
17616 prefix from 16 to 104. In this way, the condition for address
17617 allocation is less restrictive. Closes ticket 20151; feature
17620 o Minor bugfixes (address discovery):
17621 - Stop reordering IP addresses returned by the OS. This makes it
17622 more likely that Tor will guess the same relay IP address every
17623 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
17624 Reported by René Mayrhofer, patch by "cypherpunks".
17626 o Minor bugfixes (client, unix domain sockets):
17627 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
17628 the client address is meaningless. Fixes bug 20261; bugfix
17631 o Minor bugfixes (compilation, OpenBSD):
17632 - Detect Libevent2 functions correctly on systems that provide
17633 libevent2, but where libevent1 is linked with -levent. Fixes bug
17634 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
17636 o Minor bugfixes (configuration):
17637 - When parsing quoted configuration values from the torrc file,
17638 handle windows line endings correctly. Fixes bug 19167; bugfix on
17639 0.2.0.16-alpha. Patch from "Pingl".
17641 o Minor bugfixes (getpass):
17642 - Defensively fix a non-triggerable heap corruption at do_getpass()
17643 to protect ourselves from mistakes in the future. Fixes bug
17644 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
17647 o Minor bugfixes (hidden service):
17648 - Allow hidden services to run on IPv6 addresses even when the
17649 IPv6Exit option is not set. Fixes bug 18357; bugfix
17653 - Add module-level internal documentation for 36 C files that
17654 previously didn't have a high-level overview. Closes ticket #20385.
17656 o Required libraries:
17657 - When building with OpenSSL, Tor now requires version 1.0.1 or
17658 later. OpenSSL 1.0.0 and earlier are no longer supported by the
17659 OpenSSL team, and should not be used. Closes ticket 20303.
17662 Changes in version 0.2.9.3-alpha - 2016-09-23
17663 Tor 0.2.9.3-alpha adds improved support for entities that want to make
17664 high-performance services available through the Tor .onion mechanism
17665 without themselves receiving anonymity as they host those services. It
17666 also tries harder to ensure that all steps on a circuit are using the
17667 strongest crypto possible, strengthens some TLS properties, and
17668 resolves several bugs -- including a pair of crash bugs from the 0.2.8
17669 series. Anybody running an earlier version of 0.2.9.x should upgrade.
17671 o Major bugfixes (crash, also in 0.2.8.8):
17672 - Fix a complicated crash bug that could affect Tor clients
17673 configured to use bridges when replacing a networkstatus consensus
17674 in which one of their bridges was mentioned. OpenBSD users saw
17675 more crashes here, but all platforms were potentially affected.
17676 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17678 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
17679 - Fix a timing-dependent assertion failure that could occur when we
17680 tried to flush from a circuit after having freed its cells because
17681 of an out-of-memory condition. Fixes bug 20203; bugfix on
17682 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17685 o Major features (circuit building, security):
17686 - Authorities, relays and clients now require ntor keys in all
17687 descriptors, for all hops (except for rare hidden service protocol
17688 cases), for all circuits, and for all other roles. Part of
17690 - Tor authorities, relays, and clients only use ntor, except for
17691 rare cases in the hidden service protocol. Part of ticket 19163.
17693 o Major features (single-hop "hidden" services):
17694 - Add experimental HiddenServiceSingleHopMode and
17695 HiddenServiceNonAnonymousMode options. When both are set to 1,
17696 every hidden service on a Tor instance becomes a non-anonymous
17697 Single Onion Service. Single Onions make one-hop (direct)
17698 connections to their introduction and rendezvous points. One-hop
17699 circuits make Single Onion servers easily locatable, but clients
17700 remain location-anonymous. This is compatible with the existing
17701 hidden service implementation, and works on the current tor
17702 network without any changes to older relays or clients. Implements
17703 proposal 260, completes ticket 17178. Patch by teor and asn.
17705 o Major features (resource management):
17706 - Tor can now notice it is about to run out of sockets, and
17707 preemptively close connections of lower priority. (This feature is
17708 off by default for now, since the current prioritizing method is
17709 yet not mature enough. You can enable it by setting
17710 "DisableOOSCheck 0", but watch out: it might close some sockets
17711 you would rather have it keep.) Closes ticket 18640.
17713 o Major bugfixes (circuit building):
17714 - Hidden service client-to-intro-point and service-to-rendezvous-
17715 point circuits use the TAP key supplied by the protocol, to avoid
17716 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
17718 o Major bugfixes (compilation, OpenBSD):
17719 - Fix a Libevent-detection bug in our autoconf script that would
17720 prevent Tor from linking successfully on OpenBSD. Patch from
17721 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
17723 o Major bugfixes (hidden services):
17724 - Clients now require hidden services to include the TAP keys for
17725 their intro points in the hidden service descriptor. This prevents
17726 an inadvertent upgrade to ntor, which a malicious hidden service
17727 could use to distinguish clients by consensus version. Fixes bug
17728 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
17730 o Minor features (security, TLS):
17731 - Servers no longer support clients that without AES ciphersuites.
17732 (3DES is no longer considered an acceptable cipher.) We believe
17733 that no such Tor clients currently exist, since Tor has required
17734 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
17736 o Minor feature (fallback directories):
17737 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17738 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17739 2016. Closes ticket 20190; patch by teor.
17741 o Minor features (geoip, also in 0.2.8.8):
17742 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17745 o Minor feature (port flags):
17746 - Add new flags to the *Port options to finer control over which
17747 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
17748 and the synthetic flag OnionTrafficOnly, which is equivalent to
17749 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
17750 18693; patch by "teor".
17752 o Minor features (directory authority):
17753 - After voting, if the authorities decide that a relay is not
17754 "Valid", they no longer include it in the consensus at all. Closes
17755 ticket 20002; implements part of proposal 272.
17757 o Minor features (testing):
17758 - Disable memory protections on OpenBSD when performing our unit
17759 tests for memwipe(). The test deliberately invokes undefined
17760 behavior, and the OpenBSD protections interfere with this. Patch
17761 from "rubiate". Closes ticket 20066.
17763 o Minor features (testing, ipv6):
17764 - Add the single-onion and single-onion-ipv6 chutney targets to
17765 "make test-network-all". This requires a recent chutney version
17766 with the single onion network flavours (git c72a652 or later).
17767 Closes ticket 20072; patch by teor.
17768 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
17769 tests. Remove bridges+hs, as it's somewhat redundant. This
17770 requires a recent chutney version that supports IPv6 clients,
17771 relays, and authorities. Closes ticket 20069; patch by teor.
17773 o Minor features (Tor2web):
17774 - Make Tor2web clients respect ReachableAddresses. This feature was
17775 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
17776 0.2.8.7. Implements feature 20034. Patch by teor.
17778 o Minor features (unit tests):
17779 - We've done significant work to make the unit tests run faster.
17780 - Our link-handshake unit tests now check that when invalid
17781 handshakes fail, they fail with the error messages we expected.
17782 - Our unit testing code that captures log messages no longer
17783 prevents them from being written out if the user asked for them
17784 (by passing --debug or --info or or --notice --warn to the "test"
17785 binary). This change prevents us from missing unexpected log
17786 messages simply because we were looking for others. Related to
17788 - The unit tests now log all warning messages with the "BUG" flag.
17789 Previously, they only logged errors by default. This change will
17790 help us make our testing code more correct, and make sure that we
17791 only hit this code when we mean to. In the meantime, however,
17792 there will be more warnings in the unit test logs than before.
17793 This is preparatory work for ticket 19999.
17794 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
17795 assertion as a test failure.
17797 o Minor bug fixes (circuits):
17798 - Use the CircuitBuildTimeout option whenever
17799 LearnCircuitBuildTimeout is disabled. Previously, we would respect
17800 the option when a user disabled it, but not when it was disabled
17801 because some other option was set. Fixes bug 20073; bugfix on
17802 0.2.4.12-alpha. Patch by teor.
17804 o Minor bugfixes (allocation):
17805 - Change how we allocate memory for large chunks on buffers, to
17806 avoid a (currently impossible) integer overflow, and to waste less
17807 space when allocating unusually large chunks. Fixes bug 20081;
17808 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
17809 - Always include orconfig.h before including any other C headers.
17810 Sometimes, it includes macros that affect the behavior of the
17811 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
17812 first version to use AC_USE_SYSTEM_EXTENSIONS).
17813 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
17814 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
17815 Patch from Gisle Vanem.
17816 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
17817 They apparently require a set of annotations that we aren't
17818 currently using, and they create false positives in our pthreads
17819 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
17821 o Minor bugfixes (directory authority):
17822 - Die with a more useful error when the operator forgets to place
17823 the authority_signing_key file into the keys directory. This
17824 avoids an uninformative assert & traceback about having an invalid
17825 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
17826 - When allowing private addresses, mark Exits that only exit to
17827 private locations as such. Fixes bug 20064; bugfix
17830 o Minor bugfixes (documentation):
17831 - Document the default PathsNeededToBuildCircuits value that's used
17832 by clients when the directory authorities don't set
17833 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
17834 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
17835 - Fix manual for the User option: it takes a username, not a UID.
17836 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
17839 o Minor bugfixes (hidden services):
17840 - Stop logging intro point details to the client log on certain
17841 error conditions. Fixed as part of bug 20012; bugfix on
17842 0.2.4.8-alpha. Patch by teor.
17844 o Minor bugfixes (IPv6, testing):
17845 - Check for IPv6 correctly on Linux when running test networks.
17846 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
17848 o Minor bugfixes (Linux seccomp2 sandbox):
17849 - Add permission to run the sched_yield() and sigaltstack() system
17850 calls, in order to support versions of Tor compiled with asan or
17851 ubsan code that use these calls. Now "sandbox 1" and
17852 "--enable-expensive-hardening" should be compatible on more
17853 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
17855 o Minor bugfixes (logging):
17856 - When logging a message from the BUG() macro, be explicit about
17857 what we were asserting. Previously we were confusing what we were
17858 asserting with what the bug was. Fixes bug 20093; bugfix
17860 - When we are unable to remove the bw_accounting file, do not warn
17861 if the reason we couldn't remove it was that it didn't exist.
17862 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
17864 o Minor bugfixes (option parsing):
17865 - Count unix sockets when counting client listeners (SOCKS, Trans,
17866 NATD, and DNS). This has no user-visible behaviour changes: these
17867 options are set once, and never read. Required for correct
17868 behaviour in ticket 17178. Fixes bug 19677; bugfix on
17869 0.2.6.3-alpha. Patch by teor.
17871 o Minor bugfixes (options):
17872 - Check the consistency of UseEntryGuards and EntryNodes more
17873 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
17875 - Stop changing the configured value of UseEntryGuards on
17876 authorities and Tor2web clients. Fixes bug 20074; bugfix on
17877 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
17880 o Minor bugfixes (Tor2web):
17881 - Prevent Tor2web clients running hidden services, these services
17882 are not anonymous due to the one-hop client paths. Fixes bug
17883 19678. Patch by teor.
17885 o Minor bugfixes (unit tests):
17886 - Fix a shared-random unit test that was failing on big endian
17887 architectures due to internal representation of a integer copied
17888 to a buffer. The test is changed to take a full 32 bytes of data
17889 and use the output of a python script that make the COMMIT and
17890 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
17892 - The tor_tls_server_info_callback unit test no longer crashes when
17893 debug-level logging is turned on. Fixes bug 20041; bugfix
17897 Changes in version 0.2.8.8 - 2016-09-23
17898 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
17899 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
17900 who select public relays as their bridges.
17902 o Major bugfixes (crash):
17903 - Fix a complicated crash bug that could affect Tor clients
17904 configured to use bridges when replacing a networkstatus consensus
17905 in which one of their bridges was mentioned. OpenBSD users saw
17906 more crashes here, but all platforms were potentially affected.
17907 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17909 o Major bugfixes (relay, OOM handler):
17910 - Fix a timing-dependent assertion failure that could occur when we
17911 tried to flush from a circuit after having freed its cells because
17912 of an out-of-memory condition. Fixes bug 20203; bugfix on
17913 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17916 o Minor feature (fallback directories):
17917 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17918 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17919 2016. Closes ticket 20190; patch by teor.
17921 o Minor features (geoip):
17922 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17926 Changes in version 0.2.9.2-alpha - 2016-08-24
17927 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
17928 several new features and bugfixes. It also includes an important
17929 authority update and an important bugfix from 0.2.8.7. Everyone who
17930 sets the ReachableAddresses option, and all bridges, are strongly
17931 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
17933 o Directory authority changes (also in 0.2.8.7):
17934 - The "Tonga" bridge authority has been retired; the new bridge
17935 authority is "Bifroest". Closes tickets 19728 and 19690.
17937 o Major bugfixes (client, security, also in 0.2.8.7):
17938 - Only use the ReachableAddresses option to restrict the first hop
17939 in a path. In earlier versions of 0.2.8.x, it would apply to
17940 every hop in the path, with a possible degradation in anonymity
17941 for anyone using an uncommon ReachableAddress setting. Fixes bug
17942 19973; bugfix on 0.2.8.2-alpha.
17944 o Major features (user interface):
17945 - Tor now supports the ability to declare options deprecated, so
17946 that we can recommend that people stop using them. Previously,
17947 this was done in an ad-hoc way. Closes ticket 19820.
17949 o Major bugfixes (directory downloads):
17950 - Avoid resetting download status for consensuses hourly, since we
17951 already have another, smarter retry mechanism. Fixes bug 8625;
17952 bugfix on 0.2.0.9-alpha.
17954 o Minor features (config):
17955 - Warn users when descriptor and port addresses are inconsistent.
17956 Mitigates bug 13953; patch by teor.
17958 o Minor features (geoip):
17959 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
17962 o Minor features (user interface):
17963 - There is a new --list-deprecated-options command-line option to
17964 list all of the deprecated options. Implemented as part of
17967 o Minor bugfixes (code style):
17968 - Fix an integer signedness conversion issue in the case conversion
17969 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
17971 o Minor bugfixes (compilation):
17972 - Build correctly on versions of libevent2 without support for
17973 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
17975 - Fix a compilation warning on GCC versions before 4.6. Our
17976 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
17977 when it is also required as an argument to the compiler pragma.
17978 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
17980 o Minor bugfixes (compilation, also in 0.2.8.7):
17981 - Remove an inappropriate "inline" in tortls.c that was causing
17982 warnings on older versions of GCC. Fixes bug 19903; bugfix
17985 o Minor bugfixes (fallback directories, also in 0.2.8.7):
17986 - Avoid logging a NULL string pointer when loading fallback
17987 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
17988 and 0.2.8.1-alpha. Report and patch by "rubiate".
17990 o Minor bugfixes (logging):
17991 - Log a more accurate message when we fail to dump a microdescriptor.
17992 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
17994 o Minor bugfixes (memory leak):
17995 - Fix a series of slow memory leaks related to parsing torrc files
17996 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
17998 o Deprecated features:
17999 - A number of DNS-cache-related sub-options for client ports are now
18000 deprecated for security reasons, and may be removed in a future
18001 version of Tor. (We believe that client-side DNS caching is a bad
18002 idea for anonymity, and you should not turn it on.) The options
18003 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
18004 UseIPv4Cache, and UseIPv6Cache.
18005 - A number of options are deprecated for security reasons, and may
18006 be removed in a future version of Tor. The options are:
18007 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
18008 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
18009 CloseHSClientCircuitsImmediatelyOnTimeout,
18010 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
18011 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
18012 UseNTorHandshake, and WarnUnsafeSocks.
18013 - The *ListenAddress options are now deprecated as unnecessary: the
18014 corresponding *Port options should be used instead. These options
18015 may someday be removed. The affected options are:
18016 ControlListenAddress, DNSListenAddress, DirListenAddress,
18017 NATDListenAddress, ORListenAddress, SocksListenAddress,
18018 and TransListenAddress.
18021 - Correct the IPv6 syntax in our documentation for the
18022 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
18025 - We no longer include the (dead, deprecated) bufferevent code in
18026 Tor. Closes ticket 19450. Based on a patch from U+039b.
18029 Changes in version 0.2.8.7 - 2016-08-24
18030 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
18031 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
18032 who sets the ReachableAddresses option, and all bridges, are strongly
18033 encouraged to upgrade.
18035 o Directory authority changes:
18036 - The "Tonga" bridge authority has been retired; the new bridge
18037 authority is "Bifroest". Closes tickets 19728 and 19690.
18039 o Major bugfixes (client, security):
18040 - Only use the ReachableAddresses option to restrict the first hop
18041 in a path. In earlier versions of 0.2.8.x, it would apply to
18042 every hop in the path, with a possible degradation in anonymity
18043 for anyone using an uncommon ReachableAddress setting. Fixes bug
18044 19973; bugfix on 0.2.8.2-alpha.
18046 o Minor features (geoip):
18047 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
18050 o Minor bugfixes (compilation):
18051 - Remove an inappropriate "inline" in tortls.c that was causing
18052 warnings on older versions of GCC. Fixes bug 19903; bugfix
18055 o Minor bugfixes (fallback directories):
18056 - Avoid logging a NULL string pointer when loading fallback
18057 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
18058 and 0.2.8.1-alpha. Report and patch by "rubiate".
18061 Changes in version 0.2.9.1-alpha - 2016-08-08
18062 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
18063 series. It improves our support for hardened builds and compiler
18064 warnings, deploys some critical infrastructure for improvements to
18065 hidden services, includes a new timing backend that we hope to use for
18066 better support for traffic padding, makes it easier for programmers to
18067 log unexpected events, and contains other small improvements to
18068 security, correctness, and performance.
18070 Below are the changes since 0.2.8.6.
18072 o New system requirements:
18073 - Tor now requires Libevent version 2.0.10-stable or later. Older
18074 versions of Libevent have less efficient backends for several
18075 platforms, and lack the DNS code that we use for our server-side
18076 DNS support. This implements ticket 19554.
18077 - Tor now requires zlib version 1.2 or later, for security,
18078 efficiency, and (eventually) gzip support. (Back when we started,
18079 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
18080 released in 2003. We recommend the latest version.)
18082 o Major features (build, hardening):
18083 - Tor now builds with -ftrapv by default on compilers that support
18084 it. This option detects signed integer overflow (which C forbids),
18085 and turns it into a hard-failure. We do not apply this option to
18086 code that needs to run in constant time to avoid side-channels;
18087 instead, we use -fwrapv in that code. Closes ticket 17983.
18088 - When --enable-expensive-hardening is selected, stop applying the
18089 clang/gcc sanitizers to code that needs to run in constant time.
18090 Although we are aware of no introduced side-channels, we are not
18091 able to prove that there are none. Related to ticket 17983.
18093 o Major features (compilation):
18094 - Our big list of extra GCC warnings is now enabled by default when
18095 building with GCC (or with anything like Clang that claims to be
18096 GCC-compatible). To make all warnings into fatal compilation
18097 errors, pass --enable-fatal-warnings to configure. Closes
18099 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
18100 turn on C and POSIX extensions. (Previously, we attempted to do
18101 this on an ad hoc basis.) Closes ticket 19139.
18103 o Major features (directory authorities, hidden services):
18104 - Directory authorities can now perform the shared randomness
18105 protocol specified by proposal 250. Using this protocol, directory
18106 authorities generate a global fresh random value every day. In the
18107 future, this value will be used by hidden services to select
18108 HSDirs. This release implements the directory authority feature;
18109 the hidden service side will be implemented in the future as part
18110 of proposal 224. Resolves ticket 16943; implements proposal 250.
18112 o Major features (downloading, random exponential backoff):
18113 - When we fail to download an object from a directory service, wait
18114 for an (exponentially increasing) randomized amount of time before
18115 retrying, rather than a fixed interval as we did before. This
18116 prevents a group of Tor instances from becoming too synchronized,
18117 or a single Tor instance from becoming too predictable, in its
18118 download schedule. Closes ticket 15942.
18120 o Major bugfixes (exit policies):
18121 - Avoid disclosing exit outbound bind addresses, configured port
18122 bind addresses, and local interface addresses in relay descriptors
18123 by default under ExitPolicyRejectPrivate. Instead, only reject
18124 these (otherwise unlisted) addresses if
18125 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
18126 0.2.7.2-alpha. Patch by teor.
18128 o Major bugfixes (hidden service client):
18129 - Allow Tor clients with appropriate controllers to work with
18130 FetchHidServDescriptors set to 0. Previously, this option also
18131 disabled descriptor cache lookup, thus breaking hidden services
18132 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
18134 o Minor features (build, hardening):
18135 - Detect and work around a libclang_rt problem that would prevent
18136 clang from finding __mulodi4() on some 32-bit platforms, and thus
18137 keep -ftrapv from linking on those systems. Closes ticket 19079.
18138 - When building on a system without runtime support for the runtime
18139 hardening options, try to log a useful warning at configuration
18140 time, rather than an incomprehensible warning at link time. If
18141 expensive hardening was requested, this warning becomes an error.
18142 Closes ticket 18895.
18144 o Minor features (code safety):
18145 - In our integer-parsing functions, ensure that maxiumum value we
18146 give is no smaller than the minimum value. Closes ticket 19063;
18149 o Minor features (controller):
18150 - Implement new GETINFO queries for all downloads that use
18151 download_status_t to schedule retries. This allows controllers to
18152 examine the schedule for pending downloads. Closes ticket 19323.
18153 - Allow controllers to configure basic client authorization on
18154 hidden services when they create them with the ADD_ONION control
18155 command. Implements ticket 15588. Patch by "special".
18156 - Fire a STATUS_SERVER controller event whenever the hibernation
18157 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
18159 o Minor features (directory authority):
18160 - Directory authorities now only give the Guard flag to a relay if
18161 they are also giving it the Stable flag. This change allows us to
18162 simplify path selection for clients. It should have minimal effect
18163 in practice, since >99% of Guards already have the Stable flag.
18164 Implements ticket 18624.
18165 - Directory authorities now write their v3-status-votes file out to
18166 disk earlier in the consensus process, so we have a record of the
18167 votes even if we abort the consensus process. Resolves
18170 o Minor features (hidden service):
18171 - Stop being so strict about the payload length of "rendezvous1"
18172 cells. We used to be locked in to the "TAP" handshake length, and
18173 now we can handle better handshakes like "ntor". Resolves
18176 o Minor features (infrastructure, time):
18177 - Tor now uses the operating system's monotonic timers (where
18178 available) for internal fine-grained timing. Previously we would
18179 look at the system clock, and then attempt to compensate for the
18180 clock running backwards. Closes ticket 18908.
18181 - Tor now includes an improved timer backend, so that we can
18182 efficiently support tens or hundreds of thousands of concurrent
18183 timers, as will be needed for some of our planned anti-traffic-
18184 analysis work. This code is based on William Ahern's "timeout.c"
18185 project, which implements a "tickless hierarchical timing wheel".
18186 Closes ticket 18365.
18188 o Minor features (logging):
18189 - Provide a more useful warning message when configured with an
18190 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
18191 - When dumping unparseable router descriptors, optionally store them
18192 in separate files, named by digest, up to a configurable size
18193 limit. You can change the size limit by setting the
18194 MaxUnparseableDescSizeToLog option, and disable this feature by
18195 setting that option to 0. Closes ticket 18322.
18196 - Add a set of macros to check nonfatal assertions, for internal
18197 use. Migrating more of our checks to these should help us avoid
18198 needless crash bugs. Closes ticket 18613.
18200 o Minor features (performance):
18201 - Change the "optimistic data" extension from "off by default" to
18202 "on by default". The default was ordinarily overridden by a
18203 consensus option, but when clients were bootstrapping for the
18204 first time, they would not have a consensus to get the option
18205 from. Changing this default saves a round-trip during startup.
18206 Closes ticket 18815.
18208 o Minor features (relay, usability):
18209 - When the directory authorities refuse a bad relay's descriptor,
18210 encourage the relay operator to contact us. Many relay operators
18211 won't notice this line in their logs, but it's a win if even a few
18212 learn why we don't like what their relay was doing. Resolves
18215 o Minor features (testing):
18216 - Let backtrace tests work correctly under AddressSanitizer. Fixes
18217 part of bug 18934; bugfix on 0.2.5.2-alpha.
18218 - Move the test-network.sh script to chutney, and modify tor's test-
18219 network.sh to call the (newer) chutney version when available.
18220 Resolves ticket 19116. Patch by teor.
18221 - Use the lcov convention for marking lines as unreachable, so that
18222 we don't count them when we're generating test coverage data.
18223 Update our coverage tools to understand this convention. Closes
18226 o Minor bugfixes (bootstrap):
18227 - Remember the directory we fetched the consensus or previous
18228 certificates from, and use it to fetch future authority
18229 certificates. This change improves bootstrapping performance.
18230 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
18232 o Minor bugfixes (build):
18233 - The test-stem and test-network makefile targets now depend only on
18234 the tor binary that they are testing. Previously, they depended on
18235 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
18236 patch from "cypherpunks".
18238 o Minor bugfixes (circuits):
18239 - Make sure extend_info_from_router() is only called on servers.
18240 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
18242 o Minor bugfixes (compilation):
18243 - When building with Clang, use a full set of GCC warnings.
18244 (Previously, we included only a subset, because of the way we
18245 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
18247 o Minor bugfixes (directory authority):
18248 - Authorities now sort the "package" lines in their votes, for ease
18249 of debugging. (They are already sorted in consensus documents.)
18250 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
18251 - When parsing a detached signature, make sure we use the length of
18252 the digest algorithm instead of an hardcoded DIGEST256_LEN in
18253 order to avoid comparing bytes out-of-bounds with a smaller digest
18254 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
18256 o Minor bugfixes (documentation):
18257 - Document the --passphrase-fd option in the tor manpage. Fixes bug
18258 19504; bugfix on 0.2.7.3-rc.
18259 - Fix the description of the --passphrase-fd option in the
18260 tor-gencert manpage. The option is used to pass the number of a
18261 file descriptor to read the passphrase from, not to read the file
18262 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
18264 o Minor bugfixes (ephemeral hidden service):
18265 - When deleting an ephemeral hidden service, close its intro points
18266 even if they are not completely open. Fixes bug 18604; bugfix
18269 o Minor bugfixes (guard selection):
18270 - Use a single entry guard even if the NumEntryGuards consensus
18271 parameter is not provided. Fixes bug 17688; bugfix
18273 - Don't mark guards as unreachable if connection_connect() fails.
18274 That function fails for local reasons, so it shouldn't reveal
18275 anything about the status of the guard. Fixes bug 14334; bugfix
18278 o Minor bugfixes (hidden service client):
18279 - Increase the minimum number of internal circuits we preemptively
18280 build from 2 to 3, so a circuit is available when a client
18281 connects to another onion service. Fixes bug 13239; bugfix
18284 o Minor bugfixes (logging):
18285 - When logging a directory ownership mismatch, log the owning
18286 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
18288 o Minor bugfixes (memory leaks):
18289 - Fix a small, uncommon memory leak that could occur when reading a
18290 truncated ed25519 key file. Fixes bug 18956; bugfix
18293 o Minor bugfixes (testing):
18294 - Allow clients to retry HSDirs much faster in test networks. Fixes
18295 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
18296 - Disable ASAN's detection of segmentation faults while running
18297 test_bt.sh, so that we can make sure that our own backtrace
18298 generation code works. Fixes another aspect of bug 18934; bugfix
18299 on 0.2.5.2-alpha. Patch from "cypherpunks".
18300 - Fix the test-network-all target on out-of-tree builds by using the
18301 correct path to the test driver script. Fixes bug 19421; bugfix
18304 o Minor bugfixes (time):
18305 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
18306 bugfix on all released tor versions.
18307 - When computing the difference between two times in milliseconds,
18308 we now round to the nearest millisecond correctly. Previously, we
18309 could sometimes round in the wrong direction. Fixes bug 19428;
18310 bugfix on 0.2.2.2-alpha.
18312 o Minor bugfixes (user interface):
18313 - Display a more accurate number of suppressed messages in the log
18314 rate-limiter. Previously, there was a potential integer overflow
18315 in the counter. Now, if the number of messages hits a maximum, the
18316 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
18318 - Fix a typo in the passphrase prompt for the ed25519 identity key.
18319 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
18321 o Code simplification and refactoring:
18322 - Remove redundant declarations of the MIN macro. Closes
18324 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
18325 Closes ticket 18462; patch from "icanhasaccount".
18326 - Split the 600-line directory_handle_command_get function into
18327 separate functions for different URL types. Closes ticket 16698.
18330 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18331 ticket 19153. Patch from "U+039b".
18333 o Removed features:
18334 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18335 "GETINFO dir-usage" controller request, which were only available
18336 via a compile-time option in Tor anyway. Feature was added in
18337 0.2.2.1-alpha. Resolves ticket 19035.
18338 - There is no longer a compile-time option to disable support for
18339 TransPort. (If you don't want TransPort; just don't use it.) Patch
18340 from "U+039b". Closes ticket 19449.
18343 - Run more workqueue tests as part of "make check". These had
18344 previously been implemented, but you needed to know special
18345 command-line options to enable them.
18346 - We now have unit tests for our code to reject zlib "compression
18347 bombs". (Fortunately, the code works fine.)
18350 Changes in version 0.2.8.6 - 2016-08-02
18352 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
18354 The Tor 0.2.8 series improves client bootstrapping performance,
18355 completes the authority-side implementation of improved identity
18356 keys for relays, and includes numerous bugfixes and performance
18357 improvements throughout the program. This release continues to
18358 improve the coverage of Tor's test suite. For a full list of
18359 changes since Tor 0.2.7, see the ReleaseNotes file.
18361 Changes since 0.2.8.5-rc:
18363 o Minor features (geoip):
18364 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
18367 o Minor bugfixes (compilation):
18368 - Fix a compilation warning in the unit tests on systems where char
18369 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
18371 o Minor bugfixes (fallback directories):
18372 - Remove 1 fallback that was on the hardcoded list, then opted-out,
18373 leaving 89 of the 100 fallbacks originally introduced in Tor
18374 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
18376 o Minor bugfixes (Linux seccomp2 sandbox):
18377 - Allow more syscalls when running with "Sandbox 1" enabled:
18378 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
18379 some systems, these are required for Tor to start. Fixes bug
18380 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
18381 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
18382 so that get_interface_address6_via_udp_socket_hack() can work.
18383 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
18386 Changes in version 0.2.8.5-rc - 2016-07-07
18387 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
18388 series. If we find no new bugs or regressions here, the first stable
18389 0.2.8 release will be identical to it. It has a few small bugfixes
18390 against previous versions.
18392 o Directory authority changes:
18393 - Urras is no longer a directory authority. Closes ticket 19271.
18395 o Major bugfixes (heartbeat):
18396 - Fix a regression that would crash Tor when the periodic
18397 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
18398 0.2.8.1-alpha. Reported by "kubaku".
18400 o Minor features (build):
18401 - Tor now again builds with the recent OpenSSL 1.1 development
18402 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
18403 - When building manual pages, set the timezone to "UTC", so that the
18404 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
18405 Patch from intrigeri.
18407 o Minor bugfixes (fallback directory selection):
18408 - Avoid errors during fallback selection if there are no eligible
18409 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
18412 o Minor bugfixes (IPv6, microdescriptors):
18413 - Don't check node addresses when we only have a routerstatus. This
18414 allows IPv6-only clients to bootstrap by fetching microdescriptors
18415 from fallback directory mirrors. (The microdescriptor consensus
18416 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
18419 o Minor bugfixes (logging):
18420 - Reduce pointlessly verbose log messages when directory servers
18421 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
18422 0.2.8.1-alpha. Patch by teor.
18423 - When a fallback directory changes its fingerprint from the hard-
18424 coded fingerprint, log a less severe, more explanatory log
18425 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
18427 o Minor bugfixes (Linux seccomp2 sandboxing):
18428 - Allow statistics to be written to disk when "Sandbox 1" is
18429 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
18430 0.2.6.1-alpha respectively.
18432 o Minor bugfixes (user interface):
18433 - Remove a warning message "Service [scrubbed] not found after
18434 descriptor upload". This message appears when one uses HSPOST
18435 control command to upload a service descriptor. Since there is
18436 only a descriptor and no service, showing this message is
18437 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
18439 o Fallback directory list:
18440 - Add a comment to the generated fallback directory list that
18441 explains how to comment out unsuitable fallbacks in a way that's
18442 compatible with the stem fallback parser.
18443 - Update fallback whitelist and blacklist based on relay operator
18444 emails. Blacklist unsuitable (non-working, over-volatile)
18445 fallbacks. Resolves ticket 19071. Patch by teor.
18446 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
18447 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
18448 ticket 19071; patch by teor.
18451 Changes in version 0.2.8.4-rc - 2016-06-15
18452 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
18453 If we find no new bugs or regressions here, the first stable 0.2.8
18454 release will be identical to it. It has a few small bugfixes against
18457 o Major bugfixes (user interface):
18458 - Correctly give a warning in the cases where a relay is specified
18459 by nickname, and one such relay is found, but it is not officially
18460 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
18462 o Minor features (build):
18463 - Tor now builds once again with the recent OpenSSL 1.1 development
18464 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
18466 o Minor features (geoip):
18467 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
18470 o Minor bugfixes (compilation):
18471 - Cause the unit tests to compile correctly on mingw64 versions that
18472 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
18474 o Minor bugfixes (downloading):
18475 - Predict more correctly whether we'll be downloading over HTTP when
18476 we determine the maximum length of a URL. This should avoid a
18477 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
18481 Changes in version 0.2.8.3-alpha - 2016-05-26
18482 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
18483 the course of the 0.2.8 development cycle. It improves the behavior of
18484 directory clients, fixes several crash bugs, fixes a gap in compiler
18485 hardening, and allows the full integration test suite to run on
18488 o Major bugfixes (security, client, DNS proxy):
18489 - Stop a crash that could occur when a client running with DNSPort
18490 received a query with multiple address types, and the first
18491 address type was not supported. Found and fixed by Scott Dial.
18492 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
18494 o Major bugfixes (security, compilation):
18495 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
18496 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
18497 cause a compiler warning, thereby making other checks fail, and
18498 needlessly disabling compiler-hardening support. Fixes one case of
18499 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
18501 o Major bugfixes (security, directory authorities):
18502 - Fix a crash and out-of-bounds write during authority voting, when
18503 the list of relays includes duplicate ed25519 identity keys. Fixes
18504 bug 19032; bugfix on 0.2.8.2-alpha.
18506 o Major bugfixes (client, bootstrapping):
18507 - Check if bootstrap consensus downloads are still needed when the
18508 linked connection attaches. This prevents tor making unnecessary
18509 begindir-style connections, which are the only directory
18510 connections tor clients make since the fix for 18483 was merged.
18511 - Fix some edge cases where consensus download connections may not
18512 have been closed, even though they were not needed. Related to fix
18514 - Make relays retry consensus downloads the correct number of times,
18515 rather than the more aggressive client retry count. Fixes part of
18517 - Stop downloading consensuses when we have a consensus, even if we
18518 don't have all the certificates for it yet. Fixes bug 18809;
18519 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
18521 o Major bugfixes (directory mirrors):
18522 - Decide whether to advertise begindir support in the the same way
18523 we decide whether to advertise our DirPort. Allowing these
18524 decisions to become out-of-sync led to surprising behavior like
18525 advertising begindir support when hibernation made us not
18526 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
18529 o Major bugfixes (IPv6 bridges, client):
18530 - Actually use IPv6 addresses when selecting directory addresses for
18531 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
18534 o Major bugfixes (key management):
18535 - If OpenSSL fails to generate an RSA key, do not retain a dangling
18536 pointer to the previous (uninitialized) key value. The impact here
18537 should be limited to a difficult-to-trigger crash, if OpenSSL is
18538 running an engine that makes key generation failures possible, or
18539 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
18540 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
18543 o Major bugfixes (testing):
18544 - Fix a bug that would block 'make test-network-all' on systems where
18545 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
18546 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
18547 bugfix on 0.2.8.1-alpha.
18549 o Minor features (clients):
18550 - Make clients, onion services, and bridge relays always use an
18551 encrypted begindir connection for directory requests. Resolves
18552 ticket 18483. Patch by "teor".
18554 o Minor features (fallback directory mirrors):
18555 - Give each fallback the same weight for client selection; restrict
18556 fallbacks to one per operator; report fallback directory detail
18557 changes when rebuilding list; add new fallback directory mirrors
18558 to the whitelist; and many other minor simplifications and fixes.
18559 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
18560 0.2.8.1-alpha; patch by "teor".
18561 - Replace the 21 fallbacks generated in January 2016 and included in
18562 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
18563 2016. Closes task 17158; patch by "teor".
18565 o Minor features (geoip):
18566 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
18569 o Minor bugfixes (assert, portability):
18570 - Fix an assertion failure in memarea.c on systems where "long" is
18571 shorter than the size of a pointer. Fixes bug 18716; bugfix
18574 o Minor bugfixes (bootstrap):
18575 - Consistently use the consensus download schedule for authority
18576 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
18578 o Minor bugfixes (build):
18579 - Remove a pair of redundant AM_CONDITIONAL declarations from
18580 configure.ac. Fixes one final case of bug 17744; bugfix
18582 - Resolve warnings when building on systems that are concerned with
18583 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
18585 - When libscrypt.h is found, but no libscrypt library can be linked,
18586 treat libscrypt as absent. Fixes bug 19161; bugfix
18589 o Minor bugfixes (client):
18590 - Turn all TestingClientBootstrap* into non-testing torrc options.
18591 This changes simply renames them by removing "Testing" in front of
18592 them and they do not require TestingTorNetwork to be enabled
18593 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
18594 - Make directory node selection more reliable, mainly for IPv6-only
18595 clients and clients with few reachable addresses. Fixes bug 18929;
18596 bugfix on 0.2.8.1-alpha. Patch by "teor".
18598 o Minor bugfixes (controller, microdescriptors):
18599 - Make GETINFO dir/status-vote/current/consensus conform to the
18600 control specification by returning "551 Could not open cached
18601 consensus..." when not caching consensuses. Fixes bug 18920;
18602 bugfix on 0.2.2.6-alpha.
18604 o Minor bugfixes (crypto, portability):
18605 - The SHA3 and SHAKE routines now produce the correct output on Big
18606 Endian systems. No code calls either algorithm yet, so this is
18607 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
18608 - Tor now builds again with the recent OpenSSL 1.1 development
18609 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
18612 o Minor bugfixes (directories):
18613 - When fetching extrainfo documents, compare their SHA256 digests
18614 and Ed25519 signing key certificates with the routerinfo that led
18615 us to fetch them, rather than with the most recent routerinfo.
18616 Otherwise we generate many spurious warnings about mismatches.
18617 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
18619 o Minor bugfixes (logging):
18620 - When we can't generate a signing key because OfflineMasterKey is
18621 set, do not imply that we should have been able to load it. Fixes
18622 bug 18133; bugfix on 0.2.7.2-alpha.
18623 - Stop periodic_event_dispatch() from blasting twelve lines per
18624 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
18625 - When rejecting a misformed INTRODUCE2 cell, only log at
18626 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
18628 o Minor bugfixes (pluggable transports):
18629 - Avoid reporting a spurious error when we decide that we don't need
18630 to terminate a pluggable transport because it has already exited.
18631 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
18633 o Minor bugfixes (pointer arithmetic):
18634 - Fix a bug in memarea_alloc() that could have resulted in remote
18635 heap write access, if Tor had ever passed an unchecked size to
18636 memarea_alloc(). Fortunately, all the sizes we pass to
18637 memarea_alloc() are pre-checked to be less than 128 kilobytes.
18638 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
18641 o Minor bugfixes (relays):
18642 - Consider more config options when relays decide whether to
18643 regenerate their descriptor. Fixes more of bug 12538; bugfix
18645 - Resolve some edge cases where we might launch an ORPort
18646 reachability check even when DisableNetwork is set. Noticed while
18647 fixing bug 18616; bugfix on 0.2.3.9-alpha.
18649 o Minor bugfixes (statistics):
18650 - We now include consensus downloads via IPv6 in our directory-
18651 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
18653 o Minor bugfixes (testing):
18654 - Allow directories in small networks to bootstrap by skipping
18655 DirPort checks when the consensus has no exits. Fixes bug 19003;
18656 bugfix on 0.2.8.1-alpha. Patch by teor.
18657 - Fix a small memory leak that would occur when the
18658 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
18659 bugfix on 0.2.5.2-alpha.
18661 o Minor bugfixes (time handling):
18662 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
18663 field. Otherwise, our unit tests crash on Windows. Fixes bug
18664 18977; bugfix on 0.2.2.25-alpha.
18667 - Document the contents of the 'datadir/keys' subdirectory in the
18668 manual page. Closes ticket 17621.
18669 - Stop recommending use of nicknames to identify relays in our
18670 MapAddress documentation. Closes ticket 18312.
18673 Changes in version 0.2.8.2-alpha - 2016-03-28
18674 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
18675 bugs in earlier versions of Tor, including some that prevented
18676 authorities using Tor 0.2.7.x from running correctly. IPv6 and
18677 directory support should also be much improved.
18679 o New system requirements:
18680 - Tor no longer supports versions of OpenSSL with a broken
18681 implementation of counter mode. (This bug was present in OpenSSL
18682 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
18683 longer runs with, these versions.
18684 - Tor no longer attempts to support platforms where the "time_t"
18685 type is unsigned. (To the best of our knowledge, only OpenVMS does
18686 this, and Tor has never actually built on OpenVMS.) Closes
18688 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
18689 later (released in 2008 and 2009 respectively). If you are
18690 building Tor from the git repository instead of from the source
18691 distribution, and your tools are older than this, you will need to
18692 upgrade. Closes ticket 17732.
18694 o Major bugfixes (security, pointers):
18695 - Avoid a difficult-to-trigger heap corruption attack when extending
18696 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
18697 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
18698 Reported by Guido Vranken.
18700 o Major bugfixes (bridges, pluggable transports):
18701 - Modify the check for OR connections to private addresses. Allow
18702 bridges on private addresses, including pluggable transports that
18703 ignore the (potentially private) address in the bridge line. Fixes
18704 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
18706 o Major bugfixes (compilation):
18707 - Repair hardened builds under the clang compiler. Previously, our
18708 use of _FORTIFY_SOURCE would conflict with clang's address
18709 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
18711 o Major bugfixes (crash on shutdown):
18712 - Correctly handle detaching circuits from muxes when shutting down.
18713 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
18714 - Fix an assert-on-exit bug related to counting memory usage in
18715 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
18717 o Major bugfixes (crash on startup):
18718 - Fix a segfault during startup: If a Unix domain socket was
18719 configured as listener (such as a ControlSocket or a SocksPort
18720 "unix:" socket), and tor was started as root but not configured to
18721 switch to another user, tor would segfault while trying to string
18722 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
18725 o Major bugfixes (dns proxy mode, crash):
18726 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
18727 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
18729 o Major bugfixes (relays, bridge clients):
18730 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
18731 bridge clients use the address configured in the bridge line.
18732 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
18735 o Major bugfixes (voting):
18736 - Actually enable support for authorities to match routers by their
18737 Ed25519 identities. Previously, the code had been written, but
18738 some debugging code that had accidentally been left in the
18739 codebase made it stay turned off. Fixes bug 17702; bugfix
18741 - When collating votes by Ed25519 identities, authorities now
18742 include a "NoEdConsensus" flag if the ed25519 value (or lack
18743 thereof) for a server does not reflect the majority consensus.
18744 Related to bug 17668; bugfix on 0.2.7.2-alpha.
18745 - When generating a vote with keypinning disabled, never include two
18746 entries for the same ed25519 identity. This bug was causing
18747 authorities to generate votes that they could not parse when a
18748 router violated key pinning by changing its RSA identity but
18749 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
18750 18318. Bugfix on 0.2.7.2-alpha.
18752 o Minor features (security, win32):
18753 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
18754 attack. Fixes bug 18123; bugfix on all tor versions. Patch
18757 o Minor features (bug-resistance):
18758 - Make Tor survive errors involving connections without a
18759 corresponding event object. Previously we'd fail with an
18760 assertion; now we produce a log message. Related to bug 16248.
18762 o Minor features (build):
18763 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
18764 as having possible IPFW support. Closes ticket 18448. Patch from
18765 Steven Chamberlain.
18767 o Minor features (code hardening):
18768 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
18769 level code, to harden against accidental failures to NUL-
18770 terminate. Part of ticket 17852. Patch from jsturgix. Found
18773 o Minor features (crypto):
18774 - Validate the hard-coded Diffie-Hellman parameters and ensure that
18775 p is a safe prime, and g is a suitable generator. Closes
18778 o Minor features (geoip):
18779 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
18782 o Minor features (hidden service directory):
18783 - Streamline relay-side hsdir handling: when relays consider whether
18784 to accept an uploaded hidden service descriptor, they no longer
18785 check whether they are one of the relays in the network that is
18786 "supposed" to handle that descriptor. Implements ticket 18332.
18788 o Minor features (IPv6):
18789 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
18790 to 1, tor prefers IPv6 directory addresses.
18791 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
18792 avoids using IPv4 for client OR and directory connections.
18793 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
18794 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
18795 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
18797 o Minor features (linux seccomp2 sandbox):
18798 - Reject attempts to change our Address with "Sandbox 1" enabled.
18799 Changing Address with Sandbox turned on would never actually work,
18800 but previously it would fail in strange and confusing ways. Found
18801 while fixing 18548.
18803 o Minor features (robustness):
18804 - Exit immediately with an error message if the code attempts to use
18805 Libevent without having initialized it. This should resolve some
18806 frequently-made mistakes in our unit tests. Closes ticket 18241.
18808 o Minor features (unix domain sockets):
18809 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
18810 Unix domain sockets without checking the permissions on the parent
18811 directory. (Tor checks permissions by default because some
18812 operating systems only check permissions on the parent directory.
18813 However, some operating systems do look at permissions on the
18814 socket, and tor's default check is unneeded.) Closes ticket 18458.
18817 o Minor bugfixes (exit policies, security):
18818 - Refresh an exit relay's exit policy when interface addresses
18819 change. Previously, tor only refreshed the exit policy when the
18820 configured external address changed. Fixes bug 18208; bugfix on
18821 0.2.7.3-rc. Patch by teor.
18823 o Minor bugfixes (security, hidden services):
18824 - Prevent hidden services connecting to client-supplied rendezvous
18825 addresses that are reserved as internal or multicast. Fixes bug
18826 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
18828 o Minor bugfixes (build):
18829 - Do not link the unit tests against both the testing and non-
18830 testing versions of the static libraries. Fixes bug 18490; bugfix
18832 - Avoid spurious failures from configure files related to calling
18833 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
18834 0.2.0.1-alpha. Patch from "cypherpunks".
18835 - Silence spurious clang-scan warnings in the ed25519_donna code by
18836 explicitly initializing some objects. Fixes bug 18384; bugfix on
18837 0.2.7.2-alpha. Patch by teor.
18839 o Minor bugfixes (client, bootstrap):
18840 - Count receipt of new microdescriptors as progress towards
18841 bootstrapping. Previously, with EntryNodes set, Tor might not
18842 successfully repopulate the guard set on bootstrapping. Fixes bug
18843 16825; bugfix on 0.2.3.1-alpha.
18845 o Minor bugfixes (code correctness):
18846 - Update to the latest version of Trunnel, which tries harder to
18847 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
18848 by clang address sanitizer. Fixes bug 18373; bugfix
18851 o Minor bugfixes (configuration):
18852 - Fix a tiny memory leak when parsing a port configuration ending in
18853 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
18855 o Minor bugfixes (containers):
18856 - If we somehow attempt to construct a heap with more than
18857 1073741822 elements, avoid an integer overflow when maintaining
18858 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
18860 o Minor bugfixes (correctness):
18861 - Fix a bad memory handling bug that would occur if we had queued a
18862 cell on a channel's incoming queue. Fortunately, we can't actually
18863 queue a cell like that as our code is constructed today, but it's
18864 best to avoid this kind of error, even if there isn't any code
18865 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
18867 o Minor bugfixes (directory):
18868 - When generating a URL for a directory server on an IPv6 address,
18869 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
18870 on 0.2.3.9-alpha. Patch from Malek.
18872 o Minor bugfixes (fallback directory mirrors):
18873 - When requesting extrainfo descriptors from a trusted directory
18874 server, check whether it is an authority or a fallback directory
18875 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
18876 0.2.4.7-alpha. Reported by atagar, patch by teor.
18878 o Minor bugfixes (hidden service, client):
18879 - Handle the case where the user makes several fast consecutive
18880 requests to the same .onion address. Previously, the first six
18881 requests would each trigger a descriptor fetch, each picking a
18882 directory (there are 6 overall) and the seventh one would fail
18883 because no directories were left, thereby triggering a close on
18884 all current directory connections asking for the hidden service.
18885 The solution here is to not close the connections if we have
18886 pending directory fetches. Fixes bug 15937; bugfix
18889 o Minor bugfixes (hidden service, control port):
18890 - Add the onion address to the HS_DESC event for the UPLOADED action
18891 both on success or failure. It was previously hardcoded with
18892 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
18894 o Minor bugfixes (hidden service, directory):
18895 - Bridges now refuse "rendezvous2" (hidden service descriptor)
18896 publish attempts. Suggested by ticket 18332.
18898 o Minor bugfixes (linux seccomp2 sandbox):
18899 - Allow the setrlimit syscall, and the prlimit and prlimit64
18900 syscalls, which some libc implementations use under the hood.
18901 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
18902 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
18903 enabled and no DNS resolvers configured. This should help TAILS
18904 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
18905 - Fix the sandbox's interoperability with unix domain sockets under
18906 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
18908 o Minor bugfixes (logging):
18909 - When logging information about an unparsable networkstatus vote or
18910 consensus, do not say "vote" when we mean consensus. Fixes bug
18911 18368; bugfix on 0.2.0.8-alpha.
18912 - Scrub service name in "unrecognized service ID" log messages.
18913 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
18914 - Downgrade logs and backtraces about IP versions to info-level.
18915 Only log backtraces once each time tor runs. Assists in diagnosing
18916 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
18917 Christian, patch by teor.
18919 o Minor bugfixes (memory safety):
18920 - Avoid freeing an uninitialized pointer when opening a socket fails
18921 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
18922 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
18924 - Correctly duplicate addresses in get_interface_address6_list().
18925 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
18926 patch by "cypherpunks".
18927 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
18929 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
18930 18672; bugfix on 0.2.5.1-alpha.
18932 o Minor bugfixes (private directory):
18933 - Prevent a race condition when creating private directories. Fixes
18934 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
18935 Patch from jsturgix. Found with Flawfinder.
18937 o Minor bugfixes (test networks, IPv6):
18938 - Allow internal IPv6 addresses in descriptors in test networks.
18939 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
18942 o Minor bugfixes (testing):
18943 - We no longer disable assertions in the unit tests when coverage is
18944 enabled. Instead, we require you to say --disable-asserts-in-tests
18945 to the configure script if you need assertions disabled in the
18946 unit tests (for example, if you want to perform branch coverage).
18947 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
18949 o Minor bugfixes (time parsing):
18950 - Avoid overflow in tor_timegm when parsing dates in and after 2038
18951 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
18952 0.0.2pre14. Patch by teor.
18954 o Minor bugfixes (tor-gencert):
18955 - Correctly handle the case where an authority operator enters a
18956 passphrase but sends an EOF before sending a newline. Fixes bug
18957 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
18959 o Code simplification and refactoring:
18960 - Quote all the string interpolations in configure.ac -- even those
18961 which we are pretty sure can't contain spaces. Closes ticket
18962 17744. Patch from zerosion.
18963 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
18964 inplace, so there's no need to have a separate implementation for
18965 the non-inplace code. Closes ticket 18258. Patch from Malek.
18966 - Simplify return types for some crypto functions that can't
18967 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
18970 - Change build messages to refer to "Fedora" instead of "Fedora
18971 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
18972 Patches from "icanhasaccount" and "cypherpunks".
18974 o Removed features:
18975 - We no longer maintain an internal freelist in memarea.c.
18976 Allocators should be good enough to make this code unnecessary,
18977 and it's doubtful that it ever had any performance benefit.
18980 - Fix several warnings from clang's address sanitizer produced in
18982 - Treat backtrace test failures as expected on FreeBSD until we
18983 solve bug 17808. Closes ticket 18204.
18986 Changes in version 0.2.8.1-alpha - 2016-02-04
18987 Tor 0.2.8.1-alpha is the first alpha release in its series. It
18988 includes numerous small features and bugfixes against previous Tor
18989 versions, and numerous small infrastructure improvements. The most
18990 notable features are a set of improvements to the directory subsystem.
18992 o Major features (security, Linux):
18993 - When Tor starts as root on Linux and is told to switch user ID, it
18994 can now retain the capability to bind to low ports. By default,
18995 Tor will do this only when it's switching user ID and some low
18996 ports have been configured. You can change this behavior with the
18997 new option KeepBindCapabilities. Closes ticket 8195.
18999 o Major features (directory system):
19000 - When bootstrapping multiple consensus downloads at a time, use the
19001 first one that starts downloading, and close the rest. This
19002 reduces failures when authorities or fallback directories are slow
19003 or down. Together with the code for feature 15775, this feature
19004 should reduces failures due to fallback churn. Implements ticket
19005 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
19006 "mikeperry" and "teor".
19007 - Include a trial list of 21 default fallback directories, generated
19008 in January 2016, based on an opt-in survey of suitable relays.
19009 Doing this should make clients bootstrap more quickly and reliably,
19010 and reduce the load on the directory authorities. Closes ticket
19011 15775. Patch by "teor".
19012 Candidates identified using an OnionOO script by "weasel", "teor",
19013 "gsathya", and "karsten".
19014 - Previously only relays that explicitly opened a directory port
19015 (DirPort) accepted directory requests from clients. Now all
19016 relays, with and without a DirPort, accept and serve tunneled
19017 directory requests that they receive through their ORPort. You can
19018 disable this behavior using the new DirCache option. Closes
19021 o Major key updates:
19022 - Update the V3 identity key for the dannenberg directory authority:
19023 it was changed on 18 November 2015. Closes task 17906. Patch
19026 o Minor features (security, clock):
19027 - Warn when the system clock appears to move back in time (when the
19028 state file was last written in the future). Tor doesn't know that
19029 consensuses have expired if the clock is in the past. Patch by
19030 "teor". Implements ticket 17188.
19032 o Minor features (security, exit policies):
19033 - ExitPolicyRejectPrivate now rejects more private addresses by
19034 default. Specifically, it now rejects the relay's outbound bind
19035 addresses (if configured), and the relay's configured port
19036 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
19037 0.2.0.11-alpha. Patch by "teor".
19039 o Minor features (security, memory erasure):
19040 - Set the unused entries in a smartlist to NULL. This helped catch
19041 a (harmless) bug, and shouldn't affect performance too much.
19042 Implements ticket 17026.
19043 - Use SecureMemoryWipe() function to securely clean memory on
19044 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
19045 Implements feature 17986.
19046 - Use explicit_bzero or memset_s when present. Previously, we'd use
19047 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
19048 from <logan@hackers.mu> and <selven@hackers.mu>.
19049 - Make memwipe() do nothing when passed a NULL pointer or buffer of
19050 zero size. Check size argument to memwipe() for underflow. Fixes
19051 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
19054 o Minor features (security, RNG):
19055 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
19056 positively are not allowed to fail. Previously we depended on
19057 internal details of OpenSSL's behavior. Closes ticket 17686.
19058 - Never use the system entropy output directly for anything besides
19059 seeding the PRNG. When we want to generate important keys, instead
19060 of using system entropy directly, we now hash it with the PRNG
19061 stream. This may help resist certain attacks based on broken OS
19062 entropy implementations. Closes part of ticket 17694.
19063 - Use modern system calls (like getentropy() or getrandom()) to
19064 generate strong entropy on platforms that have them. Closes
19067 o Minor features (accounting):
19068 - Added two modes to the AccountingRule option: One for limiting
19069 only the number of bytes sent ("AccountingRule out"), and one for
19070 limiting only the number of bytes received ("AccountingRule in").
19071 Closes ticket 15989; patch from "unixninja92".
19073 o Minor features (build):
19074 - Since our build process now uses "make distcheck", we no longer
19075 force "make dist" to depend on "make check". Closes ticket 17893;
19076 patch from "cypherpunks."
19077 - Tor now builds successfully with the recent OpenSSL 1.1
19078 development branch, and with the latest LibreSSL. Closes tickets
19079 17549, 17921, and 17984.
19081 o Minor features (controller):
19082 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
19083 tickets 16774 and 17817. Patch by George Tankersley.
19084 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
19085 service descriptor from a service's local hidden service
19086 descriptor cache. Closes ticket 14846.
19087 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
19088 controllers can examine the the reject rules added by
19089 ExitPolicyRejectPrivate. This makes it easier for stem to display
19092 o Minor features (crypto):
19093 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
19095 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
19096 - When allocating a digest state object, allocate no more space than
19097 we actually need. Previously, we would allocate as much space as
19098 the state for the largest algorithm would need. This change saves
19099 up to 672 bytes per circuit. Closes ticket 17796.
19100 - Improve performance when hashing non-multiple of 8 sized buffers,
19101 based on Andrew Moon's public domain SipHash-2-4 implementation.
19102 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
19104 o Minor features (directory downloads):
19105 - Wait for busy authorities and fallback directories to become non-
19106 busy when bootstrapping. (A similar change was made in 6c443e987d
19107 for directory caches chosen from the consensus.) Closes ticket
19108 17864; patch by "teor".
19109 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
19110 directory mirrors. The default is 1; set it to 0 to disable
19111 fallbacks. Implements ticket 17576. Patch by "teor".
19113 o Minor features (geoip):
19114 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
19117 o Minor features (IPv6):
19118 - Add an argument 'ipv6=address:orport' to the DirAuthority and
19119 FallbackDir torrc options, to specify an IPv6 address for an
19120 authority or fallback directory. Add hard-coded ipv6 addresses for
19121 directory authorities that have them. Closes ticket 17327; patch
19122 from Nick Mathewson and "teor".
19123 - Add address policy assume_action support for IPv6 addresses.
19124 - Limit IPv6 mask bits to 128.
19125 - Warn when comparing against an AF_UNSPEC address in a policy, it's
19126 almost always a bug. Closes ticket 17863; patch by "teor".
19127 - Allow users to configure directory authorities and fallback
19128 directory servers with IPv6 addresses and ORPorts. Resolves
19130 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
19131 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
19132 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
19133 17638; bugfix on 0.0.2pre8. Patch by "teor".
19135 o Minor features (logging):
19136 - When logging to syslog, allow a tag to be added to the syslog
19137 identity (the string prepended to every log message). The tag can
19138 be configured with SyslogIdentityTag and defaults to none. Setting
19139 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
19142 o Minor features (portability):
19143 - Use timingsafe_memcmp() where available. Closes ticket 17944;
19144 patch from <logan@hackers.mu>.
19146 o Minor features (relay, address discovery):
19147 - Add a family argument to get_interface_addresses_raw() and
19148 subfunctions to make network interface address interogation more
19149 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
19150 types of interfaces from the operating system. Resolves
19152 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
19153 fails to enumerate interface addresses using the platform-specific
19154 API, have it rely on the UDP socket fallback technique to try and
19155 find out what IP addresses (both IPv4 and IPv6) our machine has.
19156 Resolves ticket 17951.
19158 o Minor features (replay cache):
19159 - The replay cache now uses SHA256 instead of SHA1. Implements
19160 feature 8961. Patch by "teor", issue reported by "rransom".
19162 o Minor features (unix file permissions):
19163 - Defer creation of Unix sockets until after setuid. This avoids
19164 needing CAP_CHOWN and CAP_FOWNER when using systemd's
19165 CapabilityBoundingSet, or chown and fowner when using SELinux.
19166 Implements part of ticket 17562. Patch from Jamie Nguyen.
19167 - If any directory created by Tor is marked as group readable, the
19168 filesystem group is allowed to be either the default GID or the
19169 root user. Allowing root to read the DataDirectory prevents the
19170 need for CAP_READ_SEARCH when using systemd's
19171 CapabilityBoundingSet, or dac_read_search when using SELinux.
19172 Implements part of ticket 17562. Patch from Jamie Nguyen.
19173 - Introduce a new DataDirectoryGroupReadable option. If it is set to
19174 1, the DataDirectory will be made readable by the default GID.
19175 Implements part of ticket 17562. Patch from Jamie Nguyen.
19177 o Minor bugfixes (accounting):
19178 - The max bandwidth when using 'AccountRule sum' is now correctly
19179 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
19180 from "unixninja92".
19182 o Minor bugfixes (code correctness):
19183 - When closing an entry connection, generate a warning if we should
19184 have sent an end cell for it but we haven't. Fixes bug 17876;
19185 bugfix on 0.2.3.2-alpha.
19186 - Assert that allocated memory held by the reputation code is freed
19187 according to its internal counters. Fixes bug 17753; bugfix
19189 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
19192 o Minor bugfixes (compilation):
19193 - Mark all object files that include micro-revision.i as depending
19194 on it, so as to make parallel builds more reliable. Fixes bug
19195 17826; bugfix on 0.2.5.1-alpha.
19196 - Don't try to use the pthread_condattr_setclock() function unless
19197 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
19198 17819; bugfix on 0.2.6.3-alpha.
19199 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
19201 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19202 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19203 - Fix search for libevent libraries on OpenBSD (and other systems
19204 that install libevent 1 and libevent 2 in parallel). Fixes bug
19205 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
19206 - Isolate environment variables meant for tests from the rest of the
19207 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
19208 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
19210 - Remove config.log only from make distclean, not from make clean.
19211 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
19213 o Minor bugfixes (crypto):
19214 - Check the return value of HMAC() and assert on failure. Fixes bug
19215 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
19217 o Minor bugfixes (fallback directories):
19218 - Mark fallbacks as "too busy" when they return a 503 response,
19219 rather than just marking authorities. Fixes bug 17572; bugfix on
19220 0.2.4.7-alpha. Patch by "teor".
19222 o Minor bugfixes (IPv6):
19223 - Update the limits in max_dl_per_request for IPv6 address length.
19224 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
19226 o Minor bugfixes (linux seccomp2 sandbox):
19227 - Fix a crash when using offline master ed25519 keys with the Linux
19228 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
19230 o Minor bugfixes (logging):
19231 - In log messages that include a function name, use __FUNCTION__
19232 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
19233 with clang __PRETTY_FUNCTION__ has extra information we don't
19234 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
19236 - Remove needless quotes from a log message about unparseable
19237 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
19239 o Minor bugfixes (portability):
19240 - Remove an #endif from configure.ac so that we correctly detect the
19241 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
19244 o Minor bugfixes (relays):
19245 - Check that both the ORPort and DirPort (if present) are reachable
19246 before publishing a relay descriptor. Otherwise, relays publish a
19247 descriptor with DirPort 0 when the DirPort reachability test takes
19248 longer than the ORPort reachability test. Fixes bug 18050; bugfix
19249 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
19251 o Minor bugfixes (relays, hidden services):
19252 - Refuse connection requests to private OR addresses unless
19253 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
19254 then refuse to send any cells to a private address. Fixes bugs
19255 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
19257 o Minor bugfixes (safe logging):
19258 - When logging a malformed hostname received through socks4, scrub
19259 it if SafeLogging says we should. Fixes bug 17419; bugfix
19262 o Minor bugfixes (statistics code):
19263 - Consistently check for overflow in round_*_to_next_multiple_of
19264 functions, and add unit tests with additional and maximal values.
19265 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
19266 - Handle edge cases in the laplace functions: avoid division by
19267 zero, avoid taking the log of zero, and silence clang type
19268 conversion warnings using round and trunc. Add unit tests for edge
19269 cases with maximal values. Fixes part of bug 13192; bugfix
19272 o Minor bugfixes (testing):
19273 - The test for log_heartbeat was incorrectly failing in timezones
19274 with non-integer offsets. Instead of comparing the end of the time
19275 string against a constant, compare it to the output of
19276 format_local_iso_time when given the correct input. Fixes bug
19277 18039; bugfix on 0.2.5.4-alpha.
19278 - Make unit tests pass on IPv6-only systems, and systems without
19279 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
19280 bugfix on 0.2.7.3-rc. Patch by "teor".
19281 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
19283 - Check the full results of SHA256 and SHA512 digests in the unit
19284 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
19286 o Code simplification and refactoring:
19287 - Move logging of redundant policy entries in
19288 policies_parse_exit_policy_internal into its own function. Closes
19289 ticket 17608; patch from "juce".
19290 - Extract the more complicated parts of circuit_mark_for_close()
19291 into a new function that we run periodically before circuits are
19292 freed. This change removes more than half of the functions
19293 currently in the "blob". Closes ticket 17218.
19294 - Clean up a little duplicated code in
19295 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
19297 - Decouple the list of streams waiting to be attached to circuits
19298 from the overall connection list. This change makes it possible to
19299 attach streams quickly while simplifying Tor's callgraph and
19300 avoiding O(N) scans of the entire connection list. Closes
19302 - When a direct directory request fails immediately on launch,
19303 instead of relaunching that request from inside the code that
19304 launches it, instead mark the connection for teardown. This change
19305 simplifies Tor's callback and prevents the directory-request
19306 launching code from invoking itself recursively. Closes
19308 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
19309 use them. Closes ticket 17926.
19312 - Add a description of the correct use of the '--keygen' command-
19313 line option. Closes ticket 17583; based on text by 's7r'.
19314 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
19315 - Explain actual minima for BandwidthRate. Closes ticket 16382.
19316 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
19317 - Mention torspec URL in the manpage and point the reader to it
19318 whenever we mention a document that belongs in torspce. Fixes
19321 o Removed features:
19322 - Remove client-side support for connecting to Tor relays running
19323 versions of Tor before 0.2.3.6-alpha. These relays didn't support
19324 the v3 TLS handshake protocol, and are no longer allowed on the
19325 Tor network. Implements the client side of ticket 11150. Based on
19326 patches by Tom van der Woerdt.
19329 - Add unit tests to check for common RNG failure modes, such as
19330 returning all zeroes, identical values, or incrementing values
19331 (OpenSSL's rand_predictable feature). Patch by "teor".
19332 - Log more information when the backtrace tests fail. Closes ticket
19333 17892. Patch from "cypherpunks."
19334 - Always test both ed25519 backends, so that we can be sure that our
19335 batch-open replacement code works. Part of ticket 16794.
19336 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19337 portion of ticket 16831.
19338 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19339 util_format.c, directory.c, and options_validate.c. Closes tickets
19340 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19342 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19343 Patch from Reinaldo de Souza Jr.
19346 Changes in version 0.2.7.6 - 2015-12-10
19347 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
19348 well as a minor bug in hidden service reliability.
19350 o Major bugfixes (guard selection):
19351 - Actually look at the Guard flag when selecting a new directory
19352 guard. When we implemented the directory guard design, we
19353 accidentally started treating all relays as if they have the Guard
19354 flag during guard selection, leading to weaker anonymity and worse
19355 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
19358 o Minor features (geoip):
19359 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
19362 o Minor bugfixes (compilation):
19363 - When checking for net/pfvar.h, include netinet/in.h if possible.
19364 This fixes transparent proxy detection on OpenBSD. Fixes bug
19365 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
19366 - Fix a compilation warning with Clang 3.6: Do not check the
19367 presence of an address which can never be NULL. Fixes bug 17781.
19369 o Minor bugfixes (correctness):
19370 - When displaying an IPv6 exit policy, include the mask bits
19371 correctly even when the number is greater than 31. Fixes bug
19372 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
19373 - The wrong list was used when looking up expired intro points in a
19374 rend service object, causing what we think could be reachability
19375 issues for hidden services, and triggering a BUG log. Fixes bug
19376 16702; bugfix on 0.2.7.2-alpha.
19377 - Fix undefined behavior in the tor_cert_checksig function. Fixes
19378 bug 17722; bugfix on 0.2.7.2-alpha.
19381 Changes in version 0.2.7.5 - 2015-11-20
19382 The Tor 0.2.7 release series is dedicated to the memory of Tor user
19383 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
19384 tirelessly to advocate human rights regardless of national borders,
19385 and oppose the encroachments of mass surveillance. He opposed national
19386 exceptionalism, he brought clarity to legal and policy debates, he
19387 understood and predicted the impact of mass surveillance on the world,
19388 and he laid the groundwork for resisting it. While serving on the Tor
19389 Project's board of directors, he brought us his uncompromising focus
19390 on technical excellence in the service of humankind. Caspar was an
19391 inimitable force for good and a wonderful friend. He was kind,
19392 humorous, generous, gallant, and believed we should protect one
19393 another without exception. We honor him here for his ideals, his
19394 efforts, and his accomplishments. Please honor his memory with works
19395 that would make him proud.
19397 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
19399 The 0.2.7 series adds a more secure identity key type for relays,
19400 improves cryptography performance, resolves several longstanding
19401 hidden-service performance issues, improves controller support for
19402 hidden services, and includes small bugfixes and performance
19403 improvements throughout the program. This release series also includes
19404 more tests than before, and significant simplifications to which parts
19405 of Tor invoke which others.
19407 (This release contains no code changes since 0.2.7.4-rc.)
19410 Changes in version 0.2.7.4-rc - 2015-10-21
19411 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
19412 fixes some important memory leaks, and a scary-looking (but mostly
19413 harmless in practice) invalid-read bug. It also has a few small
19414 bugfixes, notably fixes for compilation and portability on different
19415 platforms. If no further significant bounds are found, the next
19416 release will the the official stable release.
19418 o Major bugfixes (security, correctness):
19419 - Fix an error that could cause us to read 4 bytes before the
19420 beginning of an openssl string. This bug could be used to cause
19421 Tor to crash on systems with unusual malloc implementations, or
19422 systems with unusual hardening installed. Fixes bug 17404; bugfix
19425 o Major bugfixes (correctness):
19426 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
19427 bug 17401; bugfix on 0.2.7.3-rc.
19429 o Major bugfixes (memory leaks):
19430 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
19431 17398; bugfix on 0.2.6.1-alpha.
19432 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
19433 17402; bugfix on 0.2.7.3-rc.
19434 - Fix a memory leak when reading an expired signing key from disk.
19435 Fixes bug 17403; bugfix on 0.2.7.2-rc.
19437 o Minor features (geoIP):
19438 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
19441 o Minor bugfixes (compilation):
19442 - Repair compilation with the most recent (unreleased, alpha)
19443 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
19444 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
19445 17251; bugfix on 0.2.7.2-alpha.
19446 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19447 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19449 o Minor bugfixes (portability):
19450 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
19451 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
19454 o Minor bugfixes (sandbox):
19455 - Add the "hidserv-stats" filename to our sandbox filter for the
19456 HiddenServiceStatistics option to work properly. Fixes bug 17354;
19457 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
19459 o Minor bugfixes (testing):
19460 - Add unit tests for get_interface_address* failure cases. Fixes bug
19461 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
19462 - Fix breakage when running 'make check' with BSD make. Fixes bug
19463 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
19464 - Make the get_ifaddrs_* unit tests more tolerant of different
19465 network configurations. (Don't assume every test box has an IPv4
19466 address, and don't assume every test box has a non-localhost
19467 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
19468 - Skip backtrace tests when backtrace support is not compiled in.
19469 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
19473 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
19474 - Note that HiddenServicePorts can take a unix domain socket. Closes
19478 Changes in version 0.2.7.3-rc - 2015-09-25
19479 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
19480 contains numerous usability fixes for Ed25519 keys, safeguards against
19481 several misconfiguration problems, significant simplifications to
19482 Tor's callgraph, and numerous bugfixes and small features.
19484 This is the most tested release of Tor to date. The unit tests cover
19485 39.40% of the code, and the integration tests (accessible with "make
19486 test-full-online", requiring stem and chutney and a network
19487 connection) raise the coverage to 64.49%.
19489 o Major features (security, hidden services):
19490 - Hidden services, if using the EntryNodes option, are required to
19491 use more than one EntryNode, in order to avoid a guard discovery
19492 attack. (This would only affect people who had configured hidden
19493 services and manually specified the EntryNodes option with a
19494 single entry-node. The impact was that it would be easy to
19495 remotely identify the guard node used by such a hidden service.
19496 See ticket for more information.) Fixes ticket 14917.
19498 o Major features (Ed25519 keys, keypinning):
19499 - The key-pinning option on directory authorities is now advisory-
19500 only by default. In a future version, or when the AuthDirPinKeys
19501 option is set, pins are enforced again. Disabling key-pinning
19502 seemed like a good idea so that we can survive the fallout of any
19503 usability problems associated with Ed25519 keys. Closes
19506 o Major features (Ed25519 performance):
19507 - Improve the speed of Ed25519 operations and Curve25519 keypair
19508 generation when built targeting 32 bit x86 platforms with SSE2
19509 available. Implements ticket 16535.
19510 - Improve the runtime speed of Ed25519 signature verification by
19511 using Ed25519-donna's batch verification support. Implements
19514 o Major features (performance testing):
19515 - The test-network.sh script now supports performance testing.
19516 Requires corresponding chutney performance testing changes. Patch
19517 by "teor". Closes ticket 14175.
19519 o Major features (relay, Ed25519):
19520 - Significant usability improvements for Ed25519 key management. Log
19521 messages are better, and the code can recover from far more
19522 failure conditions. Thanks to "s7r" for reporting and diagnosing
19524 - Add a new OfflineMasterKey option to tell Tor never to try loading
19525 or generating a secret Ed25519 identity key. You can use this in
19526 combination with tor --keygen to manage offline and/or encrypted
19527 Ed25519 keys. Implements ticket 16944.
19528 - Add a --newpass option to allow changing or removing the
19529 passphrase of an encrypted key with tor --keygen. Implements part
19531 - On receiving a HUP signal, check to see whether the Ed25519
19532 signing key has changed, and reload it if so. Closes ticket 16790.
19534 o Major bugfixes (relay, Ed25519):
19535 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
19536 0.2.7.2-alpha. Reported by "s7r".
19537 - Improve handling of expired signing keys with offline master keys.
19538 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
19540 o Minor features (client-side privacy):
19541 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
19542 lifespan when IsolateSOCKSAuth and streams with SOCKS
19543 authentication are attached to the circuit. This allows
19544 applications like TorBrowser to manage circuit lifetime on their
19545 own. Implements feature 15482.
19546 - When logging malformed hostnames from SOCKS5 requests, respect
19547 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
19549 o Minor features (compilation):
19550 - Give a warning as early as possible when trying to build with an
19551 unsupported OpenSSL version. Closes ticket 16901.
19552 - Fail during configure if we're trying to build against an OpenSSL
19553 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
19554 which started requiring ECC.
19556 o Minor features (geoip):
19557 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
19560 o Minor features (hidden services):
19561 - Relays need to have the Fast flag to get the HSDir flag. As this
19562 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
19563 drop. This change should make some attacks against the hidden
19564 service directory system harder. Fixes ticket 15963.
19565 - Turn on hidden service statistics collection by setting the torrc
19566 option HiddenServiceStatistics to "1" by default. (This keeps
19567 track only of the fraction of traffic used by hidden services, and
19568 the total number of hidden services in existence.) Closes
19570 - Client now uses an introduction point failure cache to know when
19571 to fetch or keep a descriptor in their cache. Previously, failures
19572 were recorded implicitly, but not explicitly remembered. Closes
19575 o Minor features (testing, authorities, documentation):
19576 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
19577 explicitly manage consensus flags in testing networks. Patch by
19578 "robgjansen", modified by "teor". Implements part of ticket 14882.
19580 o Minor bugfixes (security, exit policies):
19581 - ExitPolicyRejectPrivate now also rejects the relay's published
19582 IPv6 address (if any), and any publicly routable IPv4 or IPv6
19583 addresses on any local interfaces. ticket 17027. Patch by "teor".
19584 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
19586 o Minor bug fixes (torrc exit policies):
19587 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
19588 produce IPv6 wildcard addresses. Previously they would produce
19589 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
19590 of bug 16069; bugfix on 0.2.4.7-alpha.
19591 - When parsing torrc ExitPolicies, we now warn for a number of cases
19592 where the user's intent is likely to differ from Tor's actual
19593 behavior. These include: using an IPv4 address with an accept6 or
19594 reject6 line; using "private" on an accept6 or reject6 line; and
19595 including any ExitPolicy lines after accept *:* or reject *:*.
19596 Related to ticket 16069.
19597 - When parsing torrc ExitPolicies, we now issue an info-level
19598 message when expanding an "accept/reject *" line to include both
19599 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
19600 - In each instance above, usage advice is provided to avoid the
19601 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
19602 16069; bugfix on 0.2.4.7-alpha.
19604 o Minor bugfixes (authority):
19605 - Don't assign "HSDir" to a router if it isn't Valid and Running.
19606 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
19607 - Downgrade log messages about Ed25519 key issues if they are in old
19608 cached router descriptors. Fixes part of bug 16286; bugfix
19610 - When we find an Ed25519 key issue in a cached descriptor, stop
19611 saying the descriptor was just "uploaded". Fixes another part of
19612 bug 16286; bugfix on 0.2.7.2-alpha.
19614 o Minor bugfixes (control port):
19615 - Repair a warning and a spurious result when getting the maximum
19616 number of file descriptors from the controller. Fixes bug 16697;
19617 bugfix on 0.2.7.2-alpha.
19619 o Minor bugfixes (correctness):
19620 - When calling channel_free_list(), avoid calling smartlist_remove()
19621 while inside a FOREACH loop. This partially reverts commit
19622 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
19623 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
19625 o Minor bugfixes (documentation):
19626 - Advise users on how to configure separate IPv4 and IPv6 exit
19627 policies in the manpage and sample torrcs. Related to ticket 16069.
19628 - Fix the usage message of tor-resolve(1) so that it no longer lists
19629 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
19630 - Fix an error in the manual page and comments for
19631 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
19632 required "ORPort connectivity". While this is true, it is in no
19633 way unique to the HSDir flag. Of all the flags, only HSDirs need a
19634 DirPort configured in order for the authorities to assign that
19635 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
19638 o Minor bugfixes (Ed25519):
19639 - Fix a memory leak when reading router descriptors with expired
19640 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
19642 o Minor bugfixes (linux seccomp2 sandbox):
19643 - Allow bridge authorities to run correctly under the seccomp2
19644 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
19645 - Allow routers with ed25519 keys to run correctly under the
19646 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
19648 o Minor bugfixes (open file limit):
19649 - Fix set_max_file_descriptors() to set by default the max open file
19650 limit to the current limit when setrlimit() fails. Fixes bug
19651 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
19653 o Minor bugfixes (portability):
19654 - Try harder to normalize the exit status of the Tor process to the
19655 standard-provided range. Fixes bug 16975; bugfix on every version
19657 - Check correctly for Windows socket errors in the workqueue
19658 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
19659 - Fix the behavior of crypto_rand_time_range() when told to consider
19660 times before 1970. (These times were possible when running in a
19661 simulated network environment where time()'s output starts at
19662 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
19663 - Restore correct operation of TLS client-cipher detection on
19664 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
19666 o Minor bugfixes (relay):
19667 - Ensure that worker threads actually exit when a fatal error or
19668 shutdown is indicated. This fix doesn't currently affect the
19669 behavior of Tor, because Tor workers never indicates fatal error
19670 or shutdown except in the unit tests. Fixes bug 16868; bugfix
19672 - Unblock threads before releasing the work queue mutex to ensure
19673 predictable scheduling behavior. Fixes bug 16644; bugfix
19676 o Code simplification and refactoring:
19677 - Change the function that's called when we need to retry all
19678 downloads so that it only reschedules the downloads to happen
19679 immediately, rather than launching them all at once itself. This
19680 further simplifies Tor's callgraph.
19681 - Move some format-parsing functions out of crypto.c and
19682 crypto_curve25519.c into crypto_format.c and/or util_format.c.
19683 - Move the client-only parts of init_keys() into a separate
19684 function. Closes ticket 16763.
19685 - Simplify the microdesc_free() implementation so that it no longer
19686 appears (to code analysis tools) to potentially invoke a huge
19687 suite of other microdesc functions.
19688 - Simply the control graph further by deferring the inner body of
19689 directory_all_unreachable() into a callback. Closes ticket 16762.
19690 - Treat the loss of an owning controller as equivalent to a SIGTERM
19691 signal. This removes a tiny amount of duplicated code, and
19692 simplifies our callgraph. Closes ticket 16788.
19693 - When generating an event to send to the controller, we no longer
19694 put the event over the network immediately. Instead, we queue
19695 these events, and use a Libevent callback to deliver them. This
19696 change simplifies Tor's callgraph by reducing the number of
19697 functions from which all other Tor functions are reachable. Closes
19699 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
19700 that try to scan or compile every file on Unix won't decide that
19702 - Remove the unused "nulterminate" argument from buf_pullup().
19705 - Recommend a 40 GB example AccountingMax in torrc.sample rather
19706 than a 4 GB max. Closes ticket 16742.
19707 - Include the TUNING document in our source tarball. It is referred
19708 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
19712 - The internal pure-C tor-fw-helper tool is now removed from the Tor
19713 distribution, in favor of the pure-Go clone available from
19714 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
19715 used by the C tor-fw-helper are not, in our opinion, very
19716 confidence- inspiring in their secure-programming techniques.
19717 Closes ticket 13338.
19718 - Remove the code that would try to aggressively flush controller
19719 connections while writing to them. This code was introduced in
19720 0.1.2.7-alpha, in order to keep output buffers from exceeding
19721 their limits. But there is no longer a maximum output buffer size,
19722 and flushing data in this way caused some undesirable recursions
19723 in our call graph. Closes ticket 16480.
19726 - Make "bridges+hs" the default test network. This tests almost all
19727 tor functionality during make test-network, while allowing tests
19728 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
19729 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
19730 (chutney). Patches by "teor".
19731 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
19732 by-side in the same parent directory. Closes ticket 16903. Patch
19734 - Use environment variables rather than autoconf substitutions to
19735 send variables from the build system to the test scripts. This
19736 change should be easier to maintain, and cause 'make distcheck' to
19737 work better than before. Fixes bug 17148.
19738 - Add a new set of callgraph analysis scripts that use clang to
19739 produce a list of which Tor functions are reachable from which
19740 other Tor functions. We're planning to use these to help simplify
19741 our code structure by identifying illogical dependencies.
19742 - Add new 'test-full' and 'test-full-online' targets to run all
19743 tests, including integration tests with stem and chutney.
19744 - Make the test-workqueue test work on Windows by initializing the
19745 network before we begin.
19746 - New make target (make test-network-all) to run multiple applicable
19747 chutney test cases. Patch from Teor; closes 16953.
19748 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
19749 functions in dns.c. Implements a portion of ticket 16831.
19750 - When building Tor with testing coverage enabled, run Chutney tests
19751 (if any) using the 'tor-cov' coverage binary.
19752 - When running test-network or test-stem, check for the absence of
19753 stem/chutney before doing any build operations.
19756 Changes in version 0.2.7.2-alpha - 2015-07-27
19757 This, the second alpha in the Tor 0.2.7 series, has a number of new
19758 features, including a way to manually pick the number of introduction
19759 points for hidden services, and the much stronger Ed25519 signing key
19760 algorithm for regular Tor relays (including support for encrypted
19761 offline identity keys in the new algorithm).
19763 Support for Ed25519 on relays is currently limited to signing router
19764 descriptors; later alphas in this series will extend Ed25519 key
19765 support to more parts of the Tor protocol.
19767 o Major features (Ed25519 identity keys, Proposal 220):
19768 - All relays now maintain a stronger identity key, using the Ed25519
19769 elliptic curve signature format. This master key is designed so
19770 that it can be kept offline. Relays also generate an online
19771 signing key, and a set of other Ed25519 keys and certificates.
19772 These are all automatically regenerated and rotated as needed.
19773 Implements part of ticket 12498.
19774 - Directory authorities now vote on Ed25519 identity keys along with
19775 RSA1024 keys. Implements part of ticket 12498.
19776 - Directory authorities track which Ed25519 identity keys have been
19777 used with which RSA1024 identity keys, and do not allow them to
19778 vary freely. Implements part of ticket 12498.
19779 - Microdescriptors now include Ed25519 identity keys. Implements
19780 part of ticket 12498.
19781 - Add support for offline encrypted Ed25519 master keys. To use this
19782 feature on your tor relay, run "tor --keygen" to make a new master
19783 key (or to make a new signing key if you already have a master
19784 key). Closes ticket 13642.
19786 o Major features (Hidden services):
19787 - Add the torrc option HiddenServiceNumIntroductionPoints, to
19788 specify a fixed number of introduction points. Its maximum value
19789 is 10 and default is 3. Using this option can increase a hidden
19790 service's reliability under load, at the cost of making it more
19791 visible that the hidden service is facing extra load. Closes
19793 - Remove the adaptive algorithm for choosing the number of
19794 introduction points, which used to change the number of
19795 introduction points (poorly) depending on the number of
19796 connections the HS sees. Closes ticket 4862.
19798 o Major features (onion key cross-certification):
19799 - Relay descriptors now include signatures of their own identity
19800 keys, made using the TAP and ntor onion keys. These signatures
19801 allow relays to prove ownership of their own onion keys. Because
19802 of this change, microdescriptors will no longer need to include
19803 RSA identity keys. Implements proposal 228; closes ticket 12499.
19805 o Major features (performance):
19806 - Improve the runtime speed of Ed25519 operations by using the
19807 public-domain Ed25519-donna by Andrew M. ("floodyberry").
19808 Implements ticket 16467.
19809 - Improve the runtime speed of the ntor handshake by using an
19810 optimized curve25519 basepoint scalarmult implementation from the
19811 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
19812 ideas by Adam Langley. Implements ticket 9663.
19814 o Major bugfixes (client-side privacy, also in 0.2.6.9):
19815 - Properly separate out each SOCKSPort when applying stream
19816 isolation. The error occurred because each port's session group
19817 was being overwritten by a default value when the listener
19818 connection was initialized. Fixes bug 16247; bugfix on
19819 0.2.6.3-alpha. Patch by "jojelino".
19821 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
19822 - Stop refusing to store updated hidden service descriptors on a
19823 client. This reverts commit 9407040c59218 (which indeed fixed bug
19824 14219, but introduced a major hidden service reachability
19825 regression detailed in bug 16381). This is a temporary fix since
19826 we can live with the minor issue in bug 14219 (it just results in
19827 some load on the network) but the regression of 16381 is too much
19828 of a setback. First-round fix for bug 16381; bugfix
19831 o Major bugfixes (hidden services):
19832 - When cannibalizing a circuit for an introduction point, always
19833 extend to the chosen exit node (creating a 4 hop circuit).
19834 Previously Tor would use the current circuit exit node, which
19835 changed the original choice of introduction point, and could cause
19836 the hidden service to skip excluded introduction points or
19837 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
19840 o Major bugfixes (open file limit):
19841 - The open file limit wasn't checked before calling
19842 tor_accept_socket_nonblocking(), which would make Tor exceed the
19843 limit. Now, before opening a new socket, Tor validates the open
19844 file limit just before, and if the max has been reached, return an
19845 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
19847 o Major bugfixes (stability, also in 0.2.6.10):
19848 - Stop crashing with an assertion failure when parsing certain kinds
19849 of malformed or truncated microdescriptors. Fixes bug 16400;
19850 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
19851 by "cypherpunks_backup".
19852 - Stop random client-side assertion failures that could occur when
19853 connecting to a busy hidden service, or connecting to a hidden
19854 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
19857 o Minor features (directory authorities, security, also in 0.2.6.9):
19858 - The HSDir flag given by authorities now requires the Stable flag.
19859 For the current network, this results in going from 2887 to 2806
19860 HSDirs. Also, it makes it harder for an attacker to launch a sybil
19861 attack by raising the effort for a relay to become Stable to
19862 require at the very least 7 days, while maintaining the 96 hours
19863 uptime requirement for HSDir. Implements ticket 8243.
19865 o Minor features (client):
19866 - Relax the validation of hostnames in SOCKS5 requests, allowing the
19867 character '_' to appear, in order to cope with domains observed in
19868 the wild that are serving non-RFC compliant records. Resolves
19870 - Relax the validation done to hostnames in SOCKS5 requests, and
19871 allow a single trailing '.' to cope with clients that pass FQDNs
19872 using that syntax to explicitly indicate that the domain name is
19873 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
19874 - Add GroupWritable and WorldWritable options to unix-socket based
19875 SocksPort and ControlPort options. These options apply to a single
19876 socket, and override {Control,Socks}SocketsGroupWritable. Closes
19879 o Minor features (control protocol):
19880 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
19881 the control protocol. Resolves ticket 15358.
19883 o Minor features (directory authorities):
19884 - Directory authorities no longer vote against the "Fast", "Stable",
19885 and "HSDir" flags just because they were going to vote against
19886 "Running": if the consensus turns out to be that the router was
19887 running, then the authority's vote should count. Patch from Peter
19888 Retzlaff; closes issue 8712.
19890 o Minor features (geoip, also in 0.2.6.10):
19891 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
19892 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
19894 o Minor features (hidden services):
19895 - Add the new options "HiddenServiceMaxStreams" and
19896 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
19897 limit the maximum number of simultaneous streams per circuit, and
19898 optionally tear down the circuit when the limit is exceeded. Part
19901 o Minor features (portability):
19902 - Use C99 variadic macros when the compiler is not GCC. This avoids
19903 failing compilations on MSVC, and fixes a log-file-based race
19904 condition in our old workarounds. Original patch from Gisle Vanem.
19906 o Minor bugfixes (compilation, also in 0.2.6.9):
19907 - Build with --enable-systemd correctly when libsystemd is
19908 installed, but systemd is not. Fixes bug 16164; bugfix on
19909 0.2.6.3-alpha. Patch from Peter Palfrader.
19911 o Minor bugfixes (controller):
19912 - Add the descriptor ID in each HS_DESC control event. It was
19913 missing, but specified in control-spec.txt. Fixes bug 15881;
19914 bugfix on 0.2.5.2-alpha.
19916 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
19917 - Check for failures from crypto_early_init, and refuse to continue.
19918 A previous typo meant that we could keep going with an
19919 uninitialized crypto library, and would have OpenSSL initialize
19920 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
19921 when implementing ticket 4900. Patch by "teor".
19923 o Minor bugfixes (hidden services):
19924 - Fix a crash when reloading configuration while at least one
19925 configured and one ephemeral hidden service exists. Fixes bug
19926 16060; bugfix on 0.2.7.1-alpha.
19927 - Avoid crashing with a double-free bug when we create an ephemeral
19928 hidden service but adding it fails for some reason. Fixes bug
19929 16228; bugfix on 0.2.7.1-alpha.
19931 o Minor bugfixes (Linux seccomp2 sandbox):
19932 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
19933 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
19935 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
19936 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
19937 these when eventfd2() support is missing. Fixes bug 16363; bugfix
19938 on 0.2.6.3-alpha. Patch from "teor".
19940 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
19941 - Fix sandboxing to work when running as a relay, by allowing the
19942 renaming of secret_id_key, and allowing the eventfd2 and futex
19943 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
19945 - Allow systemd connections to work with the Linux seccomp2 sandbox
19946 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
19949 o Minor bugfixes (relay):
19950 - Fix a rarely-encountered memory leak when failing to initialize
19951 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
19952 from "cypherpunks".
19954 o Minor bugfixes (systemd):
19955 - Fix an accidental formatting error that broke the systemd
19956 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
19957 - Tor's systemd unit file no longer contains extraneous spaces.
19958 These spaces would sometimes confuse tools like deb-systemd-
19959 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
19961 o Minor bugfixes (tests):
19962 - Use the configured Python executable when running test-stem-full.
19963 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
19965 o Minor bugfixes (tests, also in 0.2.6.9):
19966 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
19967 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
19969 o Minor bugfixes (threads, comments):
19970 - Always initialize return value in compute_desc_id in rendcommon.c
19971 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19972 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
19973 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19974 - Remove undefined directive-in-macro in test_util_writepid clang
19975 3.7 complains that using a preprocessor directive inside a macro
19976 invocation in test_util_writepid in test_util.c is undefined.
19977 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19979 o Code simplification and refactoring:
19980 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
19981 to ensure they remain consistent and visible everywhere.
19982 - Remove some vestigial workarounds for the MSVC6 compiler. We
19983 haven't supported that in ages.
19984 - The link authentication code has been refactored for better
19985 testability and reliability. It now uses code generated with the
19986 "trunnel" binary encoding generator, to reduce the risk of bugs
19987 due to programmer error. Done as part of ticket 12498.
19990 - Include a specific and (hopefully) accurate documentation of the
19991 torrc file's meta-format in doc/torrc_format.txt. This is mainly
19992 of interest to people writing programs to parse or generate torrc
19993 files. This document is not a commitment to long-term
19994 compatibility; some aspects of the current format are a bit
19995 ridiculous. Closes ticket 2325.
19997 o Removed features:
19998 - Tor no longer supports copies of OpenSSL that are missing support
19999 for Elliptic Curve Cryptography. (We began using ECC when
20000 available in 0.2.4.8-alpha, for more safe and efficient key
20001 negotiation.) In particular, support for at least one of P256 or
20002 P224 is now required, with manual configuration needed if only
20003 P224 is available. Resolves ticket 16140.
20004 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
20005 on an operating system that has not upgraded to OpenSSL 1.0 or
20006 later, and you compile Tor from source, you will need to install a
20007 more recent OpenSSL to link Tor against.) These versions of
20008 OpenSSL are still supported by the OpenSSL, but the numerous
20009 cryptographic improvements in later OpenSSL releases makes them a
20010 clear choice. Resolves ticket 16034.
20011 - Remove the HidServDirectoryV2 option. Now all relays offer to
20012 store hidden service descriptors. Related to 16543.
20013 - Remove the VoteOnHidServDirectoriesV2 option, since all
20014 authorities have long set it to 1. Closes ticket 16543.
20017 - Document use of coverity, clang static analyzer, and clang dynamic
20018 undefined behavior and address sanitizers in doc/HACKING. Include
20019 detailed usage instructions in the blacklist. Patch by "teor".
20020 Closes ticket 15817.
20021 - The link authentication protocol code now has extensive tests.
20022 - The relay descriptor signature testing code now has
20024 - The test_workqueue program now runs faster, and is enabled by
20025 default as a part of "make check".
20026 - Now that OpenSSL has its own scrypt implementation, add an unit
20027 test that checks for interoperability between libscrypt_scrypt()
20028 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
20029 and rely on EVP_PBE_scrypt() whenever possible. Resolves
20033 Changes in version 0.2.6.10 - 2015-07-12
20034 Tor version 0.2.6.10 fixes some significant stability and hidden
20035 service client bugs, bulletproofs the cryptography init process, and
20036 fixes a bug when using the sandbox code with some older versions of
20037 Linux. Everyone running an older version, especially an older version
20038 of 0.2.6, should upgrade.
20040 o Major bugfixes (hidden service clients, stability):
20041 - Stop refusing to store updated hidden service descriptors on a
20042 client. This reverts commit 9407040c59218 (which indeed fixed bug
20043 14219, but introduced a major hidden service reachability
20044 regression detailed in bug 16381). This is a temporary fix since
20045 we can live with the minor issue in bug 14219 (it just results in
20046 some load on the network) but the regression of 16381 is too much
20047 of a setback. First-round fix for bug 16381; bugfix
20050 o Major bugfixes (stability):
20051 - Stop crashing with an assertion failure when parsing certain kinds
20052 of malformed or truncated microdescriptors. Fixes bug 16400;
20053 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
20054 by "cypherpunks_backup".
20055 - Stop random client-side assertion failures that could occur when
20056 connecting to a busy hidden service, or connecting to a hidden
20057 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
20060 o Minor features (geoip):
20061 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
20062 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
20064 o Minor bugfixes (crypto error-handling):
20065 - Check for failures from crypto_early_init, and refuse to continue.
20066 A previous typo meant that we could keep going with an
20067 uninitialized crypto library, and would have OpenSSL initialize
20068 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
20069 when implementing ticket 4900. Patch by "teor".
20071 o Minor bugfixes (Linux seccomp2 sandbox):
20072 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
20073 these when eventfd2() support is missing. Fixes bug 16363; bugfix
20074 on 0.2.6.3-alpha. Patch from "teor".
20077 Changes in version 0.2.6.9 - 2015-06-11
20078 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
20079 requirements for receiving an HSDir flag, and addresses some other small
20080 bugs in the systemd and sandbox code. Clients using circuit isolation
20081 should upgrade; all directory authorities should upgrade.
20083 o Major bugfixes (client-side privacy):
20084 - Properly separate out each SOCKSPort when applying stream
20085 isolation. The error occurred because each port's session group was
20086 being overwritten by a default value when the listener connection
20087 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
20090 o Minor feature (directory authorities, security):
20091 - The HSDir flag given by authorities now requires the Stable flag.
20092 For the current network, this results in going from 2887 to 2806
20093 HSDirs. Also, it makes it harder for an attacker to launch a sybil
20094 attack by raising the effort for a relay to become Stable which
20095 takes at the very least 7 days to do so and by keeping the 96
20096 hours uptime requirement for HSDir. Implements ticket 8243.
20098 o Minor bugfixes (compilation):
20099 - Build with --enable-systemd correctly when libsystemd is
20100 installed, but systemd is not. Fixes bug 16164; bugfix on
20101 0.2.6.3-alpha. Patch from Peter Palfrader.
20103 o Minor bugfixes (Linux seccomp2 sandbox):
20104 - Fix sandboxing to work when running as a relaymby renaming of
20105 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
20106 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
20107 - Allow systemd connections to work with the Linux seccomp2 sandbox
20108 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
20111 o Minor bugfixes (tests):
20112 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
20113 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
20116 Changes in version 0.2.6.8 - 2015-05-21
20117 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
20118 fixes an authority-side bug in assigning the HSDir flag. All directory
20119 authorities should upgrade.
20121 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
20122 - Revert commit that made directory authorities assign the HSDir
20123 flag to relays without a DirPort; this was bad because such relays
20124 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20127 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
20128 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20129 a client authorized hidden service. Fixes bug 15823; bugfix
20132 o Minor features (geoip):
20133 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20134 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20138 Changes in version 0.2.7.1-alpha - 2015-05-12
20139 Tor 0.2.7.1-alpha is the first alpha release in its series. It
20140 includes numerous small features and bugfixes against previous Tor
20141 versions, and numerous small infrastructure improvements. The most
20142 notable features are several new ways for controllers to interact with
20143 the hidden services subsystem.
20145 o New system requirements:
20146 - Tor no longer includes workarounds to support Libevent versions
20147 before 1.3e. Libevent 2.0 or later is recommended. Closes
20150 o Major features (controller):
20151 - Add the ADD_ONION and DEL_ONION commands that allow the creation
20152 and management of hidden services via the controller. Closes
20154 - New "GETINFO onions/current" and "GETINFO onions/detached"
20155 commands to get information about hidden services created via the
20156 controller. Part of ticket 6411.
20157 - New HSFETCH command to launch a request for a hidden service
20158 descriptor. Closes ticket 14847.
20159 - New HSPOST command to upload a hidden service descriptor. Closes
20160 ticket 3523. Patch by "DonnchaC".
20162 o Major bugfixes (hidden services):
20163 - Revert commit that made directory authorities assign the HSDir
20164 flag to relays without a DirPort; this was bad because such relays
20165 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
20168 o Minor features (clock-jump tolerance):
20169 - Recover better when our clock jumps back many hours, like might
20170 happen for Tails or Whonix users who start with a very wrong
20171 hardware clock, use Tor to discover a more accurate time, and then
20172 fix their clock. Resolves part of ticket 8766.
20174 o Minor features (command-line interface):
20175 - Make --hash-password imply --hush to prevent unnecessary noise.
20176 Closes ticket 15542. Patch from "cypherpunks".
20177 - Print a warning whenever we find a relative file path being used
20178 as torrc option. Resolves issue 14018.
20180 o Minor features (controller):
20181 - Add DirAuthority lines for default directory authorities to the
20182 output of the "GETINFO config/defaults" command if not already
20183 present. Implements ticket 14840.
20184 - Controllers can now use "GETINFO hs/client/desc/id/..." to
20185 retrieve items from the client's hidden service descriptor cache.
20186 Closes ticket 14845.
20187 - Implement a new controller command "GETINFO status/fresh-relay-
20188 descs" to fetch a descriptor/extrainfo pair that was generated on
20189 demand just for the controller's use. Implements ticket 14784.
20191 o Minor features (DoS-resistance):
20192 - Make it harder for attackers to overload hidden services with
20193 introductions, by blocking multiple introduction requests on the
20194 same circuit. Resolves ticket 15515.
20196 o Minor features (geoip):
20197 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
20198 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
20201 o Minor features (HS popularity countermeasure):
20202 - To avoid leaking HS popularity, don't cycle the introduction point
20203 when we've handled a fixed number of INTRODUCE2 cells but instead
20204 cycle it when a random number of introductions is reached, thus
20205 making it more difficult for an attacker to find out the amount of
20206 clients that have used the introduction point for a specific HS.
20207 Closes ticket 15745.
20209 o Minor features (logging):
20210 - Include the Tor version in all LD_BUG log messages, since people
20211 tend to cut and paste those into the bugtracker. Implements
20214 o Minor features (pluggable transports):
20215 - When launching managed pluggable transports on Linux systems,
20216 attempt to have the kernel deliver a SIGTERM on tor exit if the
20217 pluggable transport process is still running. Resolves
20219 - When launching managed pluggable transports, setup a valid open
20220 stdin in the child process that can be used to detect if tor has
20221 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
20222 can be used by implementations to detect this new behavior.
20223 Resolves ticket 15435.
20225 o Minor features (testing):
20226 - Add a test to verify that the compiler does not eliminate our
20227 memwipe() implementation. Closes ticket 15377.
20228 - Add make rule `check-changes` to verify the format of changes
20229 files. Closes ticket 15180.
20230 - Add unit tests for control_event_is_interesting(). Add a compile-
20231 time check that the number of events doesn't exceed the capacity
20232 of control_event_t.event_mask. Closes ticket 15431, checks for
20233 bugs similar to 13085. Patch by "teor".
20234 - Command-line argument tests moved to Stem. Resolves ticket 14806.
20235 - Integrate the ntor, backtrace, and zero-length keys tests into the
20236 automake test suite. Closes ticket 15344.
20237 - Remove assertions during builds to determine Tor's test coverage.
20238 We don't want to trigger these even in assertions, so including
20239 them artificially makes our branch coverage look worse than it is.
20240 This patch provides the new test-stem-full and coverage-html-full
20241 configure options. Implements ticket 15400.
20243 o Minor bugfixes (build):
20244 - Improve out-of-tree builds by making non-standard rules work and
20245 clean up additional files and directories. Fixes bug 15053; bugfix
20248 o Minor bugfixes (command-line interface):
20249 - When "--quiet" is provided along with "--validate-config", do not
20250 write anything to stdout on success. Fixes bug 14994; bugfix
20252 - When complaining about bad arguments to "--dump-config", use
20253 stderr, not stdout.
20255 o Minor bugfixes (configuration, unit tests):
20256 - Only add the default fallback directories when the DirAuthorities,
20257 AlternateDirAuthority, and FallbackDir directory config options
20258 are set to their defaults. The default fallback directory list is
20259 currently empty, this fix will only change tor's behavior when it
20260 has default fallback directories. Includes unit tests for
20261 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
20262 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
20264 o Minor bugfixes (correctness):
20265 - For correctness, avoid modifying a constant string in
20266 handle_control_postdescriptor. Fixes bug 15546; bugfix
20268 - Remove side-effects from tor_assert() calls. This was harmless,
20269 because we never disable assertions, but it is bad style and
20270 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
20273 o Minor bugfixes (hidden service):
20274 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
20275 a client authorized hidden service. Fixes bug 15823; bugfix
20277 - Remove an extraneous newline character from the end of hidden
20278 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
20280 o Minor bugfixes (interface):
20281 - Print usage information for --dump-config when it is used without
20282 an argument. Also, fix the error message to use different wording
20283 and add newline at the end. Fixes bug 15541; bugfix
20286 o Minor bugfixes (logs):
20287 - When building Tor under Clang, do not include an extra set of
20288 parentheses in log messages that include function names. Fixes bug
20289 15269; bugfix on every released version of Tor when compiled with
20290 recent enough Clang.
20292 o Minor bugfixes (network):
20293 - When attempting to use fallback technique for network interface
20294 lookup, disregard loopback and multicast addresses since they are
20295 unsuitable for public communications.
20297 o Minor bugfixes (statistics):
20298 - Disregard the ConnDirectionStatistics torrc options when Tor is
20299 not a relay since in that mode of operation no sensible data is
20300 being collected and because Tor might run into measurement hiccups
20301 when running as a client for some time, then becoming a relay.
20302 Fixes bug 15604; bugfix on 0.2.2.35.
20304 o Minor bugfixes (test networks):
20305 - When self-testing reachability, use ExtendAllowPrivateAddresses to
20306 determine if local/private addresses imply reachability. The
20307 previous fix used TestingTorNetwork, which implies
20308 ExtendAllowPrivateAddresses, but this excluded rare configurations
20309 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
20310 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
20311 issue discovered by CJ Ess.
20313 o Minor bugfixes (testing):
20314 - Check for matching value in server response in ntor_ref.py. Fixes
20315 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
20317 - Set the severity correctly when testing
20318 get_interface_addresses_ifaddrs() and
20319 get_interface_addresses_win32(), so that the tests fail gracefully
20320 instead of triggering an assertion. Fixes bug 15759; bugfix on
20321 0.2.6.3-alpha. Reported by Nicolas Derive.
20323 o Code simplification and refactoring:
20324 - Move the hacky fallback code out of get_interface_address6() into
20325 separate function and get it covered with unit-tests. Resolves
20327 - Refactor hidden service client-side cache lookup to intelligently
20328 report its various failure cases, and disentangle failure cases
20329 involving a lack of introduction points. Closes ticket 14391.
20330 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20331 control over the output. Part of ticket 15652.
20334 - Improve the descriptions of statistics-related torrc options in
20335 the manpage to describe rationale and possible uses cases. Fixes
20337 - Improve the layout and formatting of ./configure --help messages.
20338 Closes ticket 15024. Patch from "cypherpunks".
20339 - Standardize on the term "server descriptor" in the manual page.
20340 Previously, we had used "router descriptor", "server descriptor",
20341 and "relay descriptor" interchangeably. Part of ticket 14987.
20344 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
20345 and always use the internal Base64 decoder. The internal decoder
20346 has been part of tor since 0.2.0.10-alpha, and no one should
20347 be using the OpenSSL one. Part of ticket 15652.
20348 - Remove the 'tor_strclear()' function; use memwipe() instead.
20349 Closes ticket 14922.
20351 o Removed features:
20352 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
20353 fingerprinting we now recommend pluggable transports; for forward-
20354 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
20355 - Remove the undocumented "--digests" command-line option. It
20356 complicated our build process, caused subtle build issues on
20357 multiple platforms, and is now redundant since we started
20358 including git version identifiers. Closes ticket 14742.
20359 - Tor no longer contains checks for ancient directory cache versions
20360 that didn't know about microdescriptors.
20361 - Tor no longer contains workarounds for stat files generated by
20362 super-old versions of Tor that didn't choose guards sensibly.
20365 Changes in version 0.2.4.27 - 2015-04-06
20366 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
20367 could be used by an attacker to crash hidden services, or crash clients
20368 visiting hidden services. Hidden services should upgrade as soon as
20369 possible; clients should upgrade whenever packages become available.
20371 This release also backports a simple improvement to make hidden
20372 services a bit less vulnerable to denial-of-service attacks.
20374 o Major bugfixes (security, hidden service):
20375 - Fix an issue that would allow a malicious client to trigger an
20376 assertion failure and halt a hidden service. Fixes bug 15600;
20377 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20378 - Fix a bug that could cause a client to crash with an assertion
20379 failure when parsing a malformed hidden service descriptor. Fixes
20380 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20382 o Minor features (DoS-resistance, hidden service):
20383 - Introduction points no longer allow multiple INTRODUCE1 cells to
20384 arrive on the same circuit. This should make it more expensive for
20385 attackers to overwhelm hidden services with introductions.
20386 Resolves ticket 15515.
20389 Changes in version 0.2.5.12 - 2015-04-06
20390 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
20391 could be used by an attacker to crash hidden services, or crash clients
20392 visiting hidden services. Hidden services should upgrade as soon as
20393 possible; clients should upgrade whenever packages become available.
20395 This release also backports a simple improvement to make hidden
20396 services a bit less vulnerable to denial-of-service attacks.
20398 o Major bugfixes (security, hidden service):
20399 - Fix an issue that would allow a malicious client to trigger an
20400 assertion failure and halt a hidden service. Fixes bug 15600;
20401 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20402 - Fix a bug that could cause a client to crash with an assertion
20403 failure when parsing a malformed hidden service descriptor. Fixes
20404 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20406 o Minor features (DoS-resistance, hidden service):
20407 - Introduction points no longer allow multiple INTRODUCE1 cells to
20408 arrive on the same circuit. This should make it more expensive for
20409 attackers to overwhelm hidden services with introductions.
20410 Resolves ticket 15515.
20413 Changes in version 0.2.6.7 - 2015-04-06
20414 Tor 0.2.6.7 fixes two security issues that could be used by an
20415 attacker to crash hidden services, or crash clients visiting hidden
20416 services. Hidden services should upgrade as soon as possible; clients
20417 should upgrade whenever packages become available.
20419 This release also contains two simple improvements to make hidden
20420 services a bit less vulnerable to denial-of-service attacks.
20422 o Major bugfixes (security, hidden service):
20423 - Fix an issue that would allow a malicious client to trigger an
20424 assertion failure and halt a hidden service. Fixes bug 15600;
20425 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20426 - Fix a bug that could cause a client to crash with an assertion
20427 failure when parsing a malformed hidden service descriptor. Fixes
20428 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20430 o Minor features (DoS-resistance, hidden service):
20431 - Introduction points no longer allow multiple INTRODUCE1 cells to
20432 arrive on the same circuit. This should make it more expensive for
20433 attackers to overwhelm hidden services with introductions.
20434 Resolves ticket 15515.
20435 - Decrease the amount of reattempts that a hidden service performs
20436 when its rendezvous circuits fail. This reduces the computational
20437 cost for running a hidden service under heavy load. Resolves
20441 Changes in version 0.2.6.6 - 2015-03-24
20442 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
20444 It adds numerous safety, security, correctness, and performance
20445 improvements. Client programs can be configured to use more kinds of
20446 sockets, AutomapHosts works better, the multithreading backend is
20447 improved, cell transmission is refactored, test coverage is much
20448 higher, more denial-of-service attacks are handled, guard selection is
20449 improved to handle long-term guards better, pluggable transports
20450 should work a bit better, and some annoying hidden service performance
20451 bugs should be addressed.
20453 o Minor bugfixes (portability):
20454 - Use the correct datatype in the SipHash-2-4 function to prevent
20455 compilers from assuming any sort of alignment. Fixes bug 15436;
20456 bugfix on 0.2.5.3-alpha.
20458 Changes in version 0.2.6.5-rc - 2015-03-18
20459 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
20460 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
20462 o Major bugfixes (client):
20463 - Avoid crashing when making certain configuration option changes on
20464 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
20467 o Major bugfixes (pluggable transports):
20468 - Initialize the extended OR Port authentication cookie before
20469 launching pluggable transports. This prevents a race condition
20470 that occurred when server-side pluggable transports would cache the
20471 authentication cookie before it has been (re)generated. Fixes bug
20472 15240; bugfix on 0.2.5.1-alpha.
20474 o Major bugfixes (portability):
20475 - Do not crash on startup when running on Solaris. Fixes a bug
20476 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
20479 o Minor features (heartbeat):
20480 - On relays, report how many connections we negotiated using each
20481 version of the Tor link protocols. This information will let us
20482 know if removing support for very old versions of the Tor
20483 protocols is harming the network. Closes ticket 15212.
20485 o Code simplification and refactoring:
20486 - Refactor main loop to extract the 'loop' part. This makes it
20487 easier to run Tor under Shadow. Closes ticket 15176.
20490 Changes in version 0.2.5.11 - 2015-03-17
20491 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
20493 It backports several bugfixes from the 0.2.6 branch, including a
20494 couple of medium-level security fixes for relays and exit nodes.
20495 It also updates the list of directory authorities.
20497 o Directory authority changes:
20498 - Remove turtles as a directory authority.
20499 - Add longclaw as a new (v3) directory authority. This implements
20500 ticket 13296. This keeps the directory authority count at 9.
20501 - The directory authority Faravahar has a new IP address. This
20502 closes ticket 14487.
20504 o Major bugfixes (crash, OSX, security):
20505 - Fix a remote denial-of-service opportunity caused by a bug in
20506 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20509 o Major bugfixes (relay, stability, possible security):
20510 - Fix a bug that could lead to a relay crashing with an assertion
20511 failure if a buffer of exactly the wrong layout was passed to
20512 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20513 0.2.0.10-alpha. Patch from 'cypherpunks'.
20514 - Do not assert if the 'data' pointer on a buffer is advanced to the
20515 very end of the buffer; log a BUG message instead. Only assert if
20516 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20518 o Major bugfixes (exit node stability):
20519 - Fix an assertion failure that could occur under high DNS load.
20520 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20521 diagnosed and fixed by "cypherpunks".
20523 o Major bugfixes (Linux seccomp2 sandbox):
20524 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20525 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20526 0.2.5.1-alpha. Patch from "sanic".
20528 o Minor features (controller):
20529 - New "GETINFO bw-event-cache" to get information about recent
20530 bandwidth events. Closes ticket 14128. Useful for controllers to
20531 get recent bandwidth history after the fix for ticket 13988.
20533 o Minor features (geoip):
20534 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20535 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20538 o Minor bugfixes (client, automapping):
20539 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20540 no value follows the option. Fixes bug 14142; bugfix on
20541 0.2.4.7-alpha. Patch by "teor".
20542 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20543 14195; bugfix on 0.1.0.1-rc.
20545 o Minor bugfixes (compilation):
20546 - Build without warnings with the stock OpenSSL srtp.h header, which
20547 has a duplicate declaration of SSL_get_selected_srtp_profile().
20548 Fixes bug 14220; this is OpenSSL's bug, not ours.
20550 o Minor bugfixes (directory authority):
20551 - Allow directory authorities to fetch more data from one another if
20552 they find themselves missing lots of votes. Previously, they had
20553 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20554 bugfix on 0.1.2.5-alpha.
20555 - Enlarge the buffer to read bwauth generated files to avoid an
20556 issue when parsing the file in dirserv_read_measured_bandwidths().
20557 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20559 o Minor bugfixes (statistics):
20560 - Increase period over which bandwidth observations are aggregated
20561 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20563 o Minor bugfixes (preventative security, C safety):
20564 - When reading a hexadecimal, base-32, or base-64 encoded value from
20565 a string, always overwrite the whole output buffer. This prevents
20566 some bugs where we would look at (but fortunately, not reveal)
20567 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20571 Changes in version 0.2.4.26 - 2015-03-17
20572 Tor 0.2.4.26 includes an updated list of directory authorities. It
20573 also backports a couple of stability and security bugfixes from 0.2.5
20576 o Directory authority changes:
20577 - Remove turtles as a directory authority.
20578 - Add longclaw as a new (v3) directory authority. This implements
20579 ticket 13296. This keeps the directory authority count at 9.
20580 - The directory authority Faravahar has a new IP address. This
20581 closes ticket 14487.
20583 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
20584 - Fix an assertion failure that could occur under high DNS load.
20585 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20586 diagnosed and fixed by "cypherpunks".
20588 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
20589 - Fix a bug that could lead to a relay crashing with an assertion
20590 failure if a buffer of exactly the wrong layout was passed to
20591 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20592 0.2.0.10-alpha. Patch from 'cypherpunks'.
20593 - Do not assert if the 'data' pointer on a buffer is advanced to the
20594 very end of the buffer; log a BUG message instead. Only assert if
20595 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20597 o Minor features (geoip):
20598 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20599 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20602 Changes in version 0.2.6.4-rc - 2015-03-09
20603 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
20604 attacker might be able to use in order to crash certain Tor
20605 directories. It also resolves some minor issues left over from, or
20606 introduced in, Tor 0.2.6.3-alpha or earlier.
20608 o Major bugfixes (crash, OSX, security):
20609 - Fix a remote denial-of-service opportunity caused by a bug in
20610 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20613 o Major bugfixes (relay, stability, possible security):
20614 - Fix a bug that could lead to a relay crashing with an assertion
20615 failure if a buffer of exactly the wrong layout is passed to
20616 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20617 0.2.0.10-alpha. Patch from "cypherpunks".
20618 - Do not assert if the 'data' pointer on a buffer is advanced to the
20619 very end of the buffer; log a BUG message instead. Only assert if
20620 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20622 o Major bugfixes (FreeBSD IPFW transparent proxy):
20623 - Fix address detection with FreeBSD transparent proxies, when
20624 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
20627 o Major bugfixes (Linux seccomp2 sandbox):
20628 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
20629 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
20631 - Allow AF_UNIX hidden services to be used with the seccomp2
20632 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
20633 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20634 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20635 0.2.5.1-alpha. Patch from "sanic".
20637 o Minor features (controller):
20638 - Messages about problems in the bootstrap process now include
20639 information about the server we were trying to connect to when we
20640 noticed the problem. Closes ticket 15006.
20642 o Minor features (geoip):
20643 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20644 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20647 o Minor features (logs):
20648 - Quiet some log messages in the heartbeat and at startup. Closes
20651 o Minor bugfixes (certificate handling):
20652 - If an authority operator accidentally makes a signing certificate
20653 with a future publication time, do not discard its real signing
20654 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
20655 - Remove any old authority certificates that have been superseded
20656 for at least two days. Previously, we would keep superseded
20657 certificates until they expired, if they were published close in
20658 time to the certificate that superseded them. Fixes bug 11454;
20659 bugfix on 0.2.1.8-alpha.
20661 o Minor bugfixes (compilation):
20662 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
20664 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
20667 o Minor bugfixes (testing):
20668 - Fix endianness issues in unit test for resolve_my_address() to
20669 have it pass on big endian systems. Fixes bug 14980; bugfix on
20671 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
20672 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
20673 - When running the new 'make test-stem' target, use the configured
20674 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
20675 from "cypherpunks".
20676 - When running the zero-length-keys tests, do not use the default
20677 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
20680 o Directory authority IP change:
20681 - The directory authority Faravahar has a new IP address. This
20682 closes ticket 14487.
20685 - Remove some lingering dead code that once supported mempools.
20686 Mempools were disabled by default in 0.2.5, and removed entirely
20687 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
20691 Changes in version 0.2.6.3-alpha - 2015-02-19
20692 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
20693 the 0.2.6.x series. It introduces support for more kinds of sockets,
20694 makes it harder to accidentally run an exit, improves our
20695 multithreading backend, incorporates several fixes for the
20696 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
20698 If no major regressions or security holes are found in this version,
20699 the next version will be a release candidate.
20701 o Deprecated versions:
20702 - Tor relays older than 0.2.4.18-rc are no longer allowed to
20703 advertise themselves on the network. Closes ticket 13555.
20705 o Major features (security, unix domain sockets):
20706 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
20707 applications can reach Tor without having to create AF_INET or
20708 AF_INET6 sockets, meaning they can completely disable their
20709 ability to make non-Tor network connections. To create a socket of
20710 this type, use "SocksPort unix:/path/to/socket". Implements
20712 - Support mapping hidden service virtual ports to AF_UNIX sockets.
20713 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
20714 Implements ticket 11485.
20716 o Major features (changed defaults):
20717 - Prevent relay operators from unintentionally running exits: When a
20718 relay is configured as an exit node, we now warn the user unless
20719 the "ExitRelay" option is set to 1. We warn even more loudly if
20720 the relay is configured with the default exit policy, since this
20721 can indicate accidental misconfiguration. Setting "ExitRelay 0"
20722 stops Tor from running as an exit relay. Closes ticket 10067.
20724 o Major features (directory system):
20725 - When downloading server- or microdescriptors from a directory
20726 server, we no longer launch multiple simultaneous requests to the
20727 same server. This reduces load on the directory servers,
20728 especially when directory guards are in use. Closes ticket 9969.
20729 - When downloading server- or microdescriptors over a tunneled
20730 connection, do not limit the length of our requests to what the
20731 Squid proxy is willing to handle. Part of ticket 9969.
20732 - Authorities can now vote on the correct digests and latest
20733 versions for different software packages. This allows packages
20734 that include Tor to use the Tor authority system as a way to get
20735 notified of updates and their correct digests. Implements proposal
20736 227. Closes ticket 10395.
20738 o Major features (guards):
20739 - Introduce the Guardfraction feature to improves load balancing on
20740 guard nodes. Specifically, it aims to reduce the traffic gap that
20741 guard nodes experience when they first get the Guard flag. This is
20742 a required step if we want to increase the guard lifetime to 9
20743 months or greater. Closes ticket 9321.
20745 o Major features (performance):
20746 - Make the CPU worker implementation more efficient by avoiding the
20747 kernel and lengthening pipelines. The original implementation used
20748 sockets to transfer data from the main thread to the workers, and
20749 didn't allow any thread to be assigned more than a single piece of
20750 work at once. The new implementation avoids communications
20751 overhead by making requests in shared memory, avoiding kernel IO
20752 where possible, and keeping more requests in flight at once.
20753 Implements ticket 9682.
20755 o Major features (relay):
20756 - Raise the minimum acceptable configured bandwidth rate for bridges
20757 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
20758 20 KiB/sec.) Closes ticket 13822.
20760 o Major bugfixes (exit node stability):
20761 - Fix an assertion failure that could occur under high DNS load.
20762 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20763 diagnosed and fixed by "cypherpunks".
20765 o Major bugfixes (mixed relay-client operation):
20766 - When running as a relay and client at the same time (not
20767 recommended), if we decide not to use a new guard because we want
20768 to retry older guards, only close the locally-originating circuits
20769 passing through that guard. Previously we would close all the
20770 circuits through that guard. Fixes bug 9819; bugfix on
20771 0.2.1.1-alpha. Reported by "skruffy".
20773 o Minor features (build):
20774 - New --disable-system-torrc compile-time option to prevent Tor from
20775 looking for the system-wide torrc or torrc-defaults files.
20776 Resolves ticket 13037.
20778 o Minor features (controller):
20779 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
20780 events so controllers can observe circuit isolation inputs. Closes
20782 - ControlPort now supports the unix:/path/to/socket syntax as an
20783 alternative to the ControlSocket option, for consistency with
20784 SocksPort and HiddenServicePort. Closes ticket 14451.
20785 - New "GETINFO bw-event-cache" to get information about recent
20786 bandwidth events. Closes ticket 14128. Useful for controllers to
20787 get recent bandwidth history after the fix for ticket 13988.
20789 o Minor features (Denial of service resistance):
20790 - Count the total number of bytes used storing hidden service
20791 descriptors against the value of MaxMemInQueues. If we're low on
20792 memory, and more than 20% of our memory is used holding hidden
20793 service descriptors, free them until no more than 10% of our
20794 memory holds hidden service descriptors. Free the least recently
20795 fetched descriptors first. Resolves ticket 13806.
20796 - When we have recently been under memory pressure (over 3/4 of
20797 MaxMemInQueues is allocated), then allocate smaller zlib objects
20798 for small requests. Closes ticket 11791.
20800 o Minor features (geoip):
20801 - Update geoip and geoip6 files to the January 7 2015 Maxmind
20802 GeoLite2 Country database.
20804 o Minor features (guard nodes):
20805 - Reduce the time delay before saving guard status to disk from 10
20806 minutes to 30 seconds (or from one hour to 10 minutes if
20807 AvoidDiskWrites is set). Closes ticket 12485.
20809 o Minor features (hidden service):
20810 - Make Sybil attacks against hidden services harder by changing the
20811 minimum time required to get the HSDir flag from 25 hours up to 96
20812 hours. Addresses ticket 14149.
20813 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
20814 services to disable the anti-scanning feature introduced in
20815 0.2.6.2-alpha. With this option not set, a connection to an
20816 unlisted port closes the circuit. With this option set, only a
20817 RELAY_DONE cell is sent. Closes ticket 14084.
20819 o Minor features (interface):
20820 - Implement "-f -" command-line option to read torrc configuration
20821 from standard input, if you don't want to store the torrc file in
20822 the file system. Implements feature 13865.
20824 o Minor features (logging):
20825 - Add a count of unique clients to the bridge heartbeat message.
20826 Resolves ticket 6852.
20827 - Suppress "router info incompatible with extra info" message when
20828 reading extrainfo documents from cache. (This message got loud
20829 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
20831 - Elevate hidden service authorized-client message from DEBUG to
20832 INFO. Closes ticket 14015.
20834 o Minor features (stability):
20835 - Add assertions in our hash-table iteration code to check for
20836 corrupted values that could cause infinite loops. Closes
20839 o Minor features (systemd):
20840 - Various improvements and modernizations in systemd hardening
20841 support. Closes ticket 13805. Patch from Craig Andrews.
20843 o Minor features (testing networks):
20844 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
20845 and the default on a testing network to 2 minutes. Drop the
20846 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
20847 keep the default on a testing network at 30 seconds. This reduces
20848 HS bootstrap time to around 25 seconds. Also, change the default
20849 time in test-network.sh to match. Closes ticket 13401. Patch
20851 - Create TestingDirAuthVoteHSDir to correspond to
20852 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
20853 HSDir flag for the listed relays regardless of uptime or ORPort
20854 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
20855 Partial implementation for ticket 14067. Patch by "teor".
20857 o Minor features (tor2web mode):
20858 - Introduce the config option Tor2webRendezvousPoints, which allows
20859 clients in Tor2webMode to select a specific Rendezvous Point to be
20860 used in HS circuits. This might allow better performance for
20861 Tor2Web nodes. Implements ticket 12844.
20863 o Minor bugfixes (client DNS):
20864 - Report the correct cached DNS expiration times on SOCKS port or in
20865 DNS replies. Previously, we would report everything as "never
20866 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
20867 - Avoid a small memory leak when we find a cached answer for a
20868 reverse DNS lookup in a client-side DNS cache. (Remember, client-
20869 side DNS caching is off by default, and is not recommended.) Fixes
20870 bug 14259; bugfix on 0.2.0.1-alpha.
20872 o Minor bugfixes (client, automapping):
20873 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20874 no value follows the option. Fixes bug 14142; bugfix on
20875 0.2.4.7-alpha. Patch by "teor".
20876 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20877 14195; bugfix on 0.1.0.1-rc.
20878 - Prevent changes to other options from removing the wildcard value
20879 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
20881 - Allow MapAddress and AutomapHostsOnResolve to work together when
20882 an address is mapped into another address type (like .onion) that
20883 must be automapped at resolve time. Fixes bug 7555; bugfix
20886 o Minor bugfixes (client, bridges):
20887 - When we are using bridges and we had a network connectivity
20888 problem, only retry connecting to our currently configured
20889 bridges, not all bridges we know about and remember using. Fixes
20890 bug 14216; bugfix on 0.2.2.17-alpha.
20892 o Minor bugfixes (client, IPv6):
20893 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
20894 flag is not set; and not because the NoIPv4Traffic flag was set.
20895 Previously we'd looked at the NoIPv4Traffic flag for both types of
20896 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
20898 o Minor bugfixes (compilation):
20899 - The address of an array in the middle of a structure will always
20900 be non-NULL. clang recognises this and complains. Disable the
20901 tautologous and redundant check to silence this warning. Fixes bug
20902 14001; bugfix on 0.2.1.2-alpha.
20903 - Avoid warnings when building with systemd 209 or later. Fixes bug
20904 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
20905 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
20906 Addresses ticket 14188.
20907 - Build without warnings with the stock OpenSSL srtp.h header, which
20908 has a duplicate declaration of SSL_get_selected_srtp_profile().
20909 Fixes bug 14220; this is OpenSSL's bug, not ours.
20910 - Do not compile any code related to Tor2Web mode when Tor2Web mode
20911 is not enabled at compile time. Previously, this code was included
20912 in a disabled state. See discussion on ticket 12844.
20913 - Remove the --disable-threads configure option again. It was
20914 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
20915 14819; bugfix on 0.2.6.2-alpha.
20917 o Minor bugfixes (controller):
20918 - Report "down" in response to the "GETINFO entry-guards" command
20919 when relays are down with an unreachable_since value. Previously,
20920 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
20921 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
20922 14116; bugfix on 0.2.2.9-alpha.
20923 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
20924 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
20926 o Minor bugfixes (directory authority):
20927 - Allow directory authorities to fetch more data from one another if
20928 they find themselves missing lots of votes. Previously, they had
20929 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20930 bugfix on 0.1.2.5-alpha.
20931 - Do not attempt to download extrainfo documents which we will be
20932 unable to validate with a matching server descriptor. Fixes bug
20933 13762; bugfix on 0.2.0.1-alpha.
20934 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
20935 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
20936 - Enlarge the buffer to read bwauth generated files to avoid an
20937 issue when parsing the file in dirserv_read_measured_bandwidths().
20938 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20940 o Minor bugfixes (file handling):
20941 - Stop failing when key files are zero-length. Instead, generate new
20942 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
20943 on all versions of Tor. Patch by "teor".
20944 - Stop generating a fresh .old RSA onion key file when the .old file
20945 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
20946 - Avoid overwriting .old key files with empty key files.
20947 - Skip loading zero-length extrainfo store, router store, stats,
20948 state, and key files.
20949 - Avoid crashing when trying to reload a torrc specified as a
20950 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
20953 o Minor bugfixes (hidden services):
20954 - Close the introduction circuit when we have no more usable intro
20955 points, instead of waiting for it to time out. This also ensures
20956 that no follow-up HS descriptor fetch is triggered when the
20957 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
20958 - When fetching a hidden service descriptor for a down service that
20959 was recently up, do not keep refetching until we try the same
20960 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
20961 - Successfully launch Tor with a nonexistent hidden service
20962 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
20963 14106; bugfix on 0.2.6.2-alpha.
20965 o Minor bugfixes (logging):
20966 - Avoid crashing when there are more log domains than entries in
20967 domain_list. Bugfix on 0.2.3.1-alpha.
20968 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
20970 - Don't log messages to stdout twice when starting up. Fixes bug
20971 13993; bugfix on 0.2.6.1-alpha.
20973 o Minor bugfixes (parsing):
20974 - Stop accepting milliseconds (or other junk) at the end of
20975 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
20976 - Support two-number and three-number version numbers correctly, in
20977 case we change the Tor versioning system in the future. Fixes bug
20978 13661; bugfix on 0.0.8pre1.
20980 o Minor bugfixes (path counting):
20981 - When deciding whether the consensus lists any exit nodes, count
20982 the number listed in the consensus, not the number we have
20983 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
20984 - When deciding whether we have any exit nodes, only examine
20985 ExitNodes when the ExitNodes option is actually set. Fixes part of
20986 bug 14918; bugfix on 0.2.6.2-alpha.
20987 - Get rid of redundant and possibly scary warnings that we are
20988 missing directory information while we bootstrap. Fixes part of
20989 bug 14918; bugfix on 0.2.6.2-alpha.
20991 o Minor bugfixes (portability):
20992 - Fix the ioctl()-based network interface lookup code so that it
20993 will work on systems that have variable-length struct ifreq, for
20995 - Fix scheduler compilation on targets where char is unsigned. Fixes
20996 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
20998 o Minor bugfixes (sandbox):
20999 - Allow glibc fatal errors to be sent to stderr before Tor exits.
21000 Previously, glibc would try to write them to /dev/tty, and the
21001 sandbox would trap the call and make Tor exit prematurely. Fixes
21002 bug 14759; bugfix on 0.2.5.1-alpha.
21004 o Minor bugfixes (shutdown):
21005 - When shutting down, always call event_del() on lingering read or
21006 write events before freeing them. Otherwise, we risk double-frees
21007 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
21010 o Minor bugfixes (small memory leaks):
21011 - Avoid leaking memory when using IPv6 virtual address mappings.
21012 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
21015 o Minor bugfixes (statistics):
21016 - Increase period over which bandwidth observations are aggregated
21017 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
21019 o Minor bugfixes (systemd support):
21020 - Fix detection and operation of systemd watchdog. Fixes part of bug
21021 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
21022 - Run correctly under systemd with the RunAsDaemon option set. Fixes
21023 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
21024 - Inform the systemd supervisor about more changes in the Tor
21025 process status. Implements part of ticket 14141. Patch from
21027 - Cause the "--disable-systemd" option to actually disable systemd
21028 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
21031 o Minor bugfixes (TLS):
21032 - Check more thoroughly throughout the TLS code for possible
21033 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
21035 o Minor bugfixes (transparent proxy):
21036 - Use getsockname, not getsockopt, to retrieve the address for a
21037 TPROXY-redirected connection. Fixes bug 13796; bugfix
21040 o Code simplification and refactoring:
21041 - Move fields related to isolating and configuring client ports into
21042 a shared structure. Previously, they were duplicated across
21043 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
21044 to copy them correctly had been the cause of at least one bug in
21045 the past. Closes ticket 8546.
21046 - Refactor the get_interface_addresses_raw() doom-function into
21047 multiple smaller and simpler subfunctions. Cover the resulting
21048 subfunctions with unit-tests. Fixes a significant portion of
21050 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
21051 only for version <= 0.2.2.24 which is now deprecated. Closes
21053 - Remove a test for a long-defunct broken version-one
21057 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
21058 for writing the OpenBSD-specific tips. Resolves ticket 13702.
21059 - Make the tor-resolve documentation match its help string and its
21060 options. Resolves part of ticket 14325.
21061 - Log a more useful error message from tor-resolve when failing to
21062 look up a hidden service address. Resolves part of ticket 14325.
21064 o Downgraded warnings:
21065 - Don't warn when we've attempted to contact a relay using the wrong
21066 ntor onion key. Closes ticket 9635.
21068 o Removed features:
21069 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
21070 longer silently accepted as an alias for "ExitNodes".
21071 - The --enable-mempool and --enable-buf-freelists options, which
21072 were originally created to work around bad malloc implementations,
21073 no longer exist. They were off-by-default in 0.2.5. Closes
21077 - Make the checkdir/perms test complete successfully even if the
21078 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
21079 - Test that tor does not fail when key files are zero-length. Check
21080 that tor generates new keys, and overwrites the empty key files.
21081 - Test that tor generates new keys when keys are missing
21082 (existing behavior).
21083 - Test that tor does not overwrite key files that already contain
21084 data (existing behavior). Tests bug 13111. Patch by "teor".
21085 - New "make test-stem" target to run stem integration tests.
21086 Requires that the "STEM_SOURCE_DIR" environment variable be set.
21087 Closes ticket 14107.
21088 - Make the test_cmdline_args.py script work correctly on Windows.
21089 Patch from Gisle Vanem.
21090 - Move the slower unit tests into a new "./src/test/test-slow"
21091 binary that can be run independently of the other tests. Closes
21093 - Avoid undefined behavior when sampling huge values from the
21094 Laplace distribution. This made unittests fail on Raspberry Pi.
21095 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
21098 Changes in version 0.2.6.2-alpha - 2014-12-31
21099 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
21100 It introduces a major new backend for deciding when to send cells on
21101 channels, which should lead down the road to big performance
21102 increases. It contains security and statistics features for better
21103 work on hidden services, and numerous bugfixes.
21105 This release contains many new unit tests, along with major
21106 performance improvements for running testing networks using Chutney.
21107 Thanks to a series of patches contributed by "teor", testing networks
21108 should now bootstrap in seconds, rather than minutes.
21110 o Major features (relay, infrastructure):
21111 - Complete revision of the code that relays use to decide which cell
21112 to send next. Formerly, we selected the best circuit to write on
21113 each channel, but we didn't select among channels in any
21114 sophisticated way. Now, we choose the best circuits globally from
21115 among those whose channels are ready to deliver traffic.
21117 This patch implements a new inter-cmux comparison API, a global
21118 high/low watermark mechanism and a global scheduler loop for
21119 transmission prioritization across all channels as well as among
21120 circuits on one channel. This schedule is currently tuned to
21121 (tolerantly) avoid making changes in network performance, but it
21122 should form the basis for major circuit performance increases in
21123 the future. Code by Andrea; tuning by Rob Jansen; implements
21126 o Major features (hidden services):
21127 - Make HS port scanning more difficult by immediately closing the
21128 circuit when a user attempts to connect to a nonexistent port.
21129 Closes ticket 13667.
21130 - Add a HiddenServiceStatistics option that allows Tor relays to
21131 gather and publish statistics about the overall size and volume of
21132 hidden service usage. Specifically, when this option is turned on,
21133 an HSDir will publish an approximate number of hidden services
21134 that have published descriptors to it the past 24 hours. Also, if
21135 a relay has acted as a hidden service rendezvous point, it will
21136 publish the approximate amount of rendezvous cells it has relayed
21137 the past 24 hours. The statistics themselves are obfuscated so
21138 that the exact values cannot be derived. For more details see
21139 proposal 238, "Better hidden service stats from Tor relays". This
21140 feature is currently disabled by default. Implements feature 13192.
21142 o Major bugfixes (client, automap):
21143 - Repair automapping with IPv6 addresses. This automapping should
21144 have worked previously, but one piece of debugging code that we
21145 inserted to detect a regression actually caused the regression to
21146 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
21147 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
21150 o Major bugfixes (hidden services):
21151 - When closing an introduction circuit that was opened in parallel
21152 with others, don't mark the introduction point as unreachable.
21153 Previously, the first successful connection to an introduction
21154 point would make the other introduction points get marked as
21155 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
21157 o Directory authority changes:
21158 - Remove turtles as a directory authority.
21159 - Add longclaw as a new (v3) directory authority. This implements
21160 ticket 13296. This keeps the directory authority count at 9.
21162 o Major removed features:
21163 - Tor clients no longer support connecting to hidden services
21164 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
21165 option has been removed. (There shouldn't be any hidden services
21166 running these versions on the network.) Closes ticket 7803.
21168 o Minor features (client):
21169 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
21170 is enabled, reject requests with IP addresses as hostnames.
21171 Resolves ticket 13315.
21173 o Minor features (controller):
21174 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
21175 write an unscheduled heartbeat message to the log. Implements
21178 o Minor features (geoip):
21179 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
21182 o Minor features (hidden services):
21183 - When re-enabling the network, don't try to build introduction
21184 circuits until we have successfully built a circuit. This makes
21185 hidden services come up faster when the network is re-enabled.
21186 Patch from "akwizgran". Closes ticket 13447.
21187 - When we fail to retrieve a hidden service descriptor, send the
21188 controller an "HS_DESC FAILED" controller event. Implements
21190 - New HiddenServiceDirGroupReadable option to cause hidden service
21191 directories and hostname files to be created group-readable. Patch
21192 from "anon", David Stainton, and "meejah". Closes ticket 11291.
21194 o Minor features (systemd):
21195 - Where supported, when running with systemd, report successful
21196 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
21197 - When running with systemd, support systemd watchdog messages. Part
21198 of ticket 11016. Patch by Michael Scherer.
21200 o Minor features (transparent proxy):
21201 - Update the transparent proxy option checks to allow for both ipfw
21202 and pf on OS X. Closes ticket 14002.
21203 - Use the correct option when using IPv6 with transparent proxy
21204 support on Linux. Resolves 13808. Patch by Francisco Blas
21207 o Minor bugfixes (preventative security, C safety):
21208 - When reading a hexadecimal, base-32, or base-64 encoded value from
21209 a string, always overwrite the whole output buffer. This prevents
21210 some bugs where we would look at (but fortunately, not reveal)
21211 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
21213 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
21214 just the part that's used. This makes it harder for data leak bugs
21215 to occur in the event of other programming failures. Resolves
21218 o Minor bugfixes (client, microdescriptors):
21219 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
21220 computing which microdescriptors to download. This keeps us from
21221 erroneous download behavior if two microdescriptor digests ever
21222 have the same first 160 bits. Fixes part of bug 13399; bugfix
21224 - Reset a router's status if its microdescriptor digest changes,
21225 even if the first 160 bits remain the same. Fixes part of bug
21226 13399; bugfix on 0.2.3.1-alpha.
21228 o Minor bugfixes (compilation):
21229 - Silence clang warnings under --enable-expensive-hardening,
21230 including implicit truncation of 64 bit values to 32 bit, const
21231 char assignment to self, tautological compare, and additional
21232 parentheses around equality tests. Fixes bug 13577; bugfix
21234 - Fix a clang warning about checking whether an address in the
21235 middle of a structure is NULL. Fixes bug 14001; bugfix
21238 o Minor bugfixes (hidden services):
21239 - Correctly send a controller event when we find that a rendezvous
21240 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
21241 - Pre-check directory permissions for new hidden-services to avoid
21242 at least one case of "Bug: Acting on config options left us in a
21243 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
21244 - When adding a new hidden service (for example, via SETCONF), Tor
21245 no longer congratulates the user for running a relay. Fixes bug
21246 13941; bugfix on 0.2.6.1-alpha.
21247 - When fetching hidden service descriptors, we now check not only
21248 for whether we got the hidden service we had in mind, but also
21249 whether we got the particular descriptors we wanted. This prevents
21250 a class of inefficient but annoying DoS attacks by hidden service
21251 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
21254 o Minor bugfixes (Linux seccomp2 sandbox):
21255 - Make transparent proxy support work along with the seccomp2
21256 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
21257 by Francisco Blas Izquierdo Riera.
21258 - Fix a memory leak in tor-resolve when running with the sandbox
21259 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
21261 o Minor bugfixes (logging):
21262 - Downgrade warnings about RSA signature failures to info log level.
21263 Emit a warning when an extra info document is found incompatible
21264 with a corresponding router descriptor. Fixes bug 9812; bugfix
21266 - Make connection_ap_handshake_attach_circuit() log the circuit ID
21267 correctly. Fixes bug 13701; bugfix on 0.0.6.
21269 o Minor bugfixes (misc):
21270 - Stop allowing invalid address patterns like "*/24" that contain
21271 both a wildcard address and a bit prefix length. This affects all
21272 our address-range parsing code. Fixes bug 7484; bugfix
21275 o Minor bugfixes (testing networks, fast startup):
21276 - Allow Tor to build circuits using a consensus with no exits. If
21277 the consensus has no exits (typical of a bootstrapping test
21278 network), allow Tor to build circuits once enough descriptors have
21279 been downloaded. This assists in bootstrapping a testing Tor
21280 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
21282 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
21283 header to directory servers. This allows us to obtain consensuses
21284 promptly when the consensus interval is very short. This assists
21285 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
21286 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
21287 - Stop assuming that private addresses are local when checking
21288 reachability in a TestingTorNetwork. Instead, when testing, assume
21289 all OR connections are remote. (This is necessary due to many test
21290 scenarios running all relays on localhost.) This assists in
21291 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
21292 0.1.0.1-rc. Patch by "teor".
21293 - Avoid building exit circuits from a consensus with no exits. Now
21294 thanks to our fix for 13718, we accept a no-exit network as not
21295 wholly lost, but we need to remember not to try to build exit
21296 circuits on it. Closes ticket 13814; patch by "teor".
21297 - Stop requiring exits to have non-zero bandwithcapacity in a
21298 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
21299 ignore exit bandwidthcapacity. This assists in bootstrapping a
21300 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
21301 on 0.2.0.3-alpha. Patch by "teor".
21302 - Add "internal" to some bootstrap statuses when no exits are
21303 available. If the consensus does not contain Exits, Tor will only
21304 build internal circuits. In this case, relevant statuses will
21305 contain the word "internal" as indicated in the Tor control-
21306 spec.txt. When bootstrap completes, Tor will be ready to build
21307 internal circuits. If a future consensus contains Exits, exit
21308 circuits may become available. Fixes part of bug 13718; bugfix on
21309 0.2.4.10-alpha. Patch by "teor".
21310 - Decrease minimum consensus interval to 10 seconds when
21311 TestingTorNetwork is set, or 5 seconds for the first consensus.
21312 Fix assumptions throughout the code that assume larger intervals.
21313 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
21315 - Avoid excluding guards from path building in minimal test
21316 networks, when we're in a test network and excluding guards would
21317 exclude all relays. This typically occurs in incredibly small tor
21318 networks, and those using "TestingAuthVoteGuard *". Fixes part of
21319 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
21321 o Code simplification and refactoring:
21322 - Stop using can_complete_circuits as a global variable; access it
21323 with a function instead.
21324 - Avoid using operators directly as macro arguments: this lets us
21325 apply coccinelle transformations to our codebase more directly.
21326 Closes ticket 13172.
21327 - Combine the functions used to parse ClientTransportPlugin and
21328 ServerTransportPlugin into a single function. Closes ticket 6456.
21329 - Add inline functions and convenience macros for inspecting channel
21330 state. Refactor the code to use convenience macros instead of
21331 checking channel state directly. Fixes issue 7356.
21332 - Document all members of was_router_added_t and rename
21333 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21334 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21335 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21336 constant instead of hardcoded value. Fixes issue 13840.
21337 - Refactor our generic strmap and digestmap types into a single
21338 implementation, so that we can add a new digest256map
21342 - Document the bridge-authority-only 'networkstatus-bridges' file.
21343 Closes ticket 13713; patch from "tom".
21344 - Fix typo in PredictedPortsRelevanceTime option description in
21345 manpage. Resolves issue 13707.
21346 - Stop suggesting that users specify relays by nickname: it isn't a
21347 good idea. Also, properly cross-reference how to specify relays in
21348 all parts of manual documenting options that take a list of
21349 relays. Closes ticket 13381.
21350 - Clarify the HiddenServiceDir option description in manpage to make
21351 it clear that relative paths are taken with respect to the current
21352 working directory. Also clarify that this behavior is not
21353 guaranteed to remain indefinitely. Fixes issue 13913.
21356 - New tests for many parts of channel, relay, and circuitmux
21357 functionality. Code by Andrea; part of 9262.
21358 - New tests for parse_transport_line(). Part of ticket 6456.
21359 - In the unit tests, use chgrp() to change the group of the unit
21360 test temporary directory to the current user, so that the sticky
21361 bit doesn't interfere with tests that check directory groups.
21363 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
21367 Changes in version 0.2.6.1-alpha - 2014-10-30
21368 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
21369 includes numerous code cleanups and new tests, and fixes a large
21370 number of annoying bugs. Out-of-memory conditions are handled better
21371 than in 0.2.5, pluggable transports have improved proxy support, and
21372 clients now use optimistic data for contacting hidden services. Also,
21373 we are now more robust to changes in what we consider a parseable
21374 directory object, so that tightening restrictions does not have a risk
21375 of introducing infinite download loops.
21377 This is the first alpha release in a new series, so expect there to be
21378 bugs. Users who would rather test out a more stable branch should stay
21379 with 0.2.5.x for now.
21381 o New compiler and system requirements:
21382 - Tor 0.2.6.x requires that your compiler support more of the C99
21383 language standard than before. The 'configure' script now detects
21384 whether your compiler supports C99 mid-block declarations and
21385 designated initializers. If it does not, Tor will not compile.
21387 We may revisit this requirement if it turns out that a significant
21388 number of people need to build Tor with compilers that don't
21389 bother implementing a 15-year-old standard. Closes ticket 13233.
21390 - Tor no longer supports systems without threading support. When we
21391 began working on Tor, there were several systems that didn't have
21392 threads, or where the thread support wasn't able to run the
21393 threads of a single process on multiple CPUs. That no longer
21394 holds: every system where Tor needs to run well now has threading
21395 support. Resolves ticket 12439.
21397 o Removed platform support:
21398 - We no longer include special code to build on Windows CE; as far
21399 as we know, nobody has used Tor on Windows CE in a very long time.
21400 Closes ticket 11446.
21402 o Major features (bridges):
21403 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
21404 transports if they are configured via the "TOR_PT_PROXY"
21405 environment variable. Implements proposal 232. Resolves
21408 o Major features (client performance, hidden services):
21409 - Allow clients to use optimistic data when connecting to a hidden
21410 service, which should remove a round-trip from hidden service
21411 initialization. See proposal 181 for details. Implements
21414 o Major features (directory system):
21415 - Upon receiving an unparseable directory object, if its digest
21416 matches what we expected, then don't try to download it again.
21417 Previously, when we got a descriptor we didn't like, we would keep
21418 trying to download it over and over. Closes ticket 11243.
21420 o Major features (sample torrc):
21421 - Add a new, infrequently-changed "torrc.minimal". This file is
21422 similar to torrc.sample, but it will change as infrequently as
21423 possible, for the benefit of users whose systems prompt them for
21424 intervention whenever a default configuration file is changed.
21425 Making this change allows us to update torrc.sample to be a more
21426 generally useful "sample torrc".
21428 o Major bugfixes (directory authorities):
21429 - Do not assign the HSDir flag to relays if they are not Valid, or
21430 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
21432 o Major bugfixes (directory bandwidth performance):
21433 - Don't flush the zlib buffer aggressively when compressing
21434 directory information for clients. This should save about 7% of
21435 the bandwidth currently used for compressed descriptors and
21436 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
21438 o Minor features (security, memory wiping):
21439 - Ensure we securely wipe keys from memory after
21440 crypto_digest_get_digest and init_curve25519_keypair_from_file
21441 have finished using them. Resolves ticket 13477.
21443 o Minor features (security, out-of-memory handling):
21444 - When handling an out-of-memory condition, allocate less memory for
21445 temporary data structures. Fixes issue 10115.
21446 - When handling an out-of-memory condition, consider more types of
21447 buffers, including those on directory connections, and zlib
21448 buffers. Resolves ticket 11792.
21451 - When identity keypair is generated for first time, log a
21452 congratulatory message that links to the new relay lifecycle
21453 document. Implements feature 10427.
21455 o Minor features (client):
21456 - Clients are now willing to send optimistic data (before they
21457 receive a 'connected' cell) to relays of any version. (Relays
21458 without support for optimistic data are no longer supported on the
21459 Tor network.) Resolves ticket 13153.
21461 o Minor features (directory authorities):
21462 - Don't list relays with a bandwidth estimate of 0 in the consensus.
21463 Implements a feature proposed during discussion of bug 13000.
21464 - In tor-gencert, report an error if the user provides the same
21465 argument more than once.
21466 - If a directory authority can't find a best consensus method in the
21467 votes that it holds, it now falls back to its favorite consensus
21468 method. Previously, it fell back to method 1. Neither of these is
21469 likely to get enough signatures, but "fall back to favorite"
21470 doesn't require us to maintain support an obsolete consensus
21471 method. Implements part of proposal 215.
21473 o Minor features (logging):
21474 - On Unix-like systems, you can now use named pipes as the target of
21475 the Log option, and other options that try to append to files.
21476 Closes ticket 12061. Patch from "carlo von lynX".
21477 - When opening a log file at startup, send it every log message that
21478 we generated between startup and opening it. Previously, log
21479 messages that were generated before opening the log file were only
21480 logged to stdout. Closes ticket 6938.
21481 - Add a TruncateLogFile option to overwrite logs instead of
21482 appending to them. Closes ticket 5583.
21484 o Minor features (portability, Solaris):
21485 - Threads are no longer disabled by default on Solaris; we believe
21486 that the versions of Solaris with broken threading support are all
21487 obsolete by now. Resolves ticket 9495.
21489 o Minor features (relay):
21490 - Re-check our address after we detect a changed IP address from
21491 getsockname(). This ensures that the controller command "GETINFO
21492 address" will report the correct value. Resolves ticket 11582.
21494 - A new AccountingRule option lets Relays set whether they'd like
21495 AccountingMax to be applied separately to inbound and outbound
21496 traffic, or applied to the sum of inbound and outbound traffic.
21497 Resolves ticket 961. Patch by "chobe".
21499 o Minor features (testing networks):
21500 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
21501 the "Exit" flag regardless of their uptime, bandwidth, or exit
21502 policy. TestingTorNetwork must be set for this option to have any
21503 effect. Previously, authorities would take up to 35 minutes to
21504 give nodes the Exit flag in a test network. Partially implements
21507 o Minor features (validation):
21508 - Check all date/time values passed to tor_timegm and
21509 parse_rfc1123_time for validity, taking leap years into account.
21510 Improves HTTP header validation. Implemented with bug 13476.
21511 - In correct_tm(), limit the range of values returned by system
21512 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
21513 This means we don't have to deal with negative or too large dates,
21514 even if a clock is wrong. Otherwise we might fail to read a file
21515 written by us which includes such a date. Fixes bug 13476.
21517 o Minor bugfixes (bridge clients):
21518 - When configured to use a bridge without an identity digest (not
21519 recommended), avoid launching an extra channel to it when
21520 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
21522 o Minor bugfixes (bridges):
21523 - When DisableNetwork is set, do not launch pluggable transport
21524 plugins, and if any are running, terminate them. Fixes bug 13213;
21525 bugfix on 0.2.3.6-alpha.
21527 o Minor bugfixes (C correctness):
21528 - Fix several instances of possible integer overflow/underflow/NaN.
21529 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
21531 - In circuit_build_times_calculate_timeout() in circuitstats.c,
21532 avoid dividing by zero in the pareto calculations. This traps
21533 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
21535 - Fix an integer overflow in format_time_interval(). Fixes bug
21536 13393; bugfix on 0.2.0.10-alpha.
21537 - Set the correct day of year value when the system's localtime(_r)
21538 or gmtime(_r) functions fail to set struct tm. Not externally
21539 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
21540 - Avoid unlikely signed integer overflow in tor_timegm on systems
21541 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
21543 o Minor bugfixes (client):
21544 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
21545 BadExit flag are not considered worthy candidates. Fixes bug
21546 13066; bugfix on 0.1.2.3-alpha.
21547 - Use the consensus schedule for downloading consensuses, and not
21548 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
21549 - Handle unsupported or malformed SOCKS5 requests properly by
21550 responding with the appropriate error message before closing the
21551 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
21553 o Minor bugfixes (client, torrc):
21554 - Stop modifying the value of our DirReqStatistics torrc option just
21555 because we're not a bridge or relay. This bug was causing Tor
21556 Browser users to write "DirReqStatistics 0" in their torrc files
21557 as if they had chosen to change the config. Fixes bug 4244; bugfix
21559 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
21560 that our options have changed every time we SIGHUP. Fixes bug
21561 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
21563 o Minor bugfixes (controller):
21564 - Return an error when the second or later arguments of the
21565 "setevents" controller command are invalid events. Previously we
21566 would return success while silently skipping invalid events. Fixes
21567 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
21569 o Minor bugfixes (directory system):
21570 - Always believe that v3 directory authorities serve extra-info
21571 documents, whether they advertise "caches-extra-info" or not.
21572 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21573 - When running as a v3 directory authority, advertise that you serve
21574 extra-info documents so that clients who want them can find them
21575 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21576 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
21577 Previously, directories offering BRIDGE_DIRINFO and some other
21578 flag (i.e. microdescriptors or extrainfo) would be ignored when
21579 looking for bridges. Partially fixes bug 13163; bugfix
21582 o Minor bugfixes (networking):
21583 - Check for orconns and use connection_or_close_for_error() rather
21584 than connection_mark_for_close() directly in the getsockopt()
21585 failure case of connection_handle_write_impl(). Fixes bug 11302;
21586 bugfix on 0.2.4.4-alpha.
21588 o Minor bugfixes (relay):
21589 - When generating our family list, remove spaces from around the
21590 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
21591 - If our previous bandwidth estimate was 0 bytes, allow publishing a
21592 new relay descriptor immediately. Fixes bug 13000; bugfix
21595 o Minor bugfixes (testing networks):
21596 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
21597 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
21598 - Stop using the default authorities in networks which provide both
21599 AlternateDirAuthority and AlternateBridgeAuthority. Partially
21600 fixes bug 13163; bugfix on 0.2.0.13-alpha.
21602 o Minor bugfixes (testing):
21603 - Stop spawn test failures due to a race condition between the
21604 SIGCHLD handler updating the process status, and the test reading
21605 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
21607 o Minor bugfixes (testing, Windows):
21608 - Avoid passing an extra backslash when creating a temporary
21609 directory for running the unit tests on Windows. Fixes bug 12392;
21610 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
21612 o Minor bugfixes (windows):
21613 - Remove code to special-case handling of NTE_BAD_KEYSET when
21614 acquiring windows CryptoAPI context. This error can't actually
21615 occur for the parameters we're providing. Fixes bug 10816; bugfix
21618 o Minor bugfixes (zlib):
21619 - Avoid truncating a zlib stream when trying to finalize it with an
21620 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
21623 - Allow our configure script to build correctly with autoconf 2.62
21624 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
21625 - Improve the error message from ./configure to make it clear that
21626 when asciidoc has not been found, the user will have to either add
21627 --disable-asciidoc argument or install asciidoc. Resolves
21630 o Code simplification and refactoring:
21631 - Change the entry_is_live() function to take named bitfield
21632 elements instead of an unnamed list of booleans. Closes
21634 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
21635 Resolves ticket 12205.
21636 - Use calloc and reallocarray functions instead of multiply-
21637 then-malloc. This makes it less likely for us to fall victim to an
21638 integer overflow attack when allocating. Resolves ticket 12855.
21639 - Use the standard macro name SIZE_MAX, instead of our
21641 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
21642 functions which take them as arguments. Replace 0 with NO_DIRINFO
21643 in a function call for clarity. Seeks to prevent future issues
21645 - Avoid 4 null pointer errors under clang static analysis by using
21646 tor_assert() to prove that the pointers aren't null. Fixes
21648 - Rework the API of policies_parse_exit_policy() to use a bitmask to
21649 represent parsing options, instead of a confusing mess of
21650 booleans. Resolves ticket 8197.
21651 - Introduce a helper function to parse ExitPolicy in
21652 or_options_t structure.
21655 - Add a doc/TUNING document with tips for handling large numbers of
21656 TCP connections when running busy Tor relay. Update the warning
21657 message to point to this file when running out of sockets
21658 operating system is allowing to use simultaneously. Resolves
21661 o Removed features:
21662 - We no longer remind the user about configuration options that have
21663 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
21664 - Remove our old, non-weighted bandwidth-based node selection code.
21665 Previously, we used it as a fallback when we couldn't perform
21666 weighted bandwidth-based node selection. But that would only
21667 happen in the cases where we had no consensus, or when we had a
21668 consensus generated by buggy or ancient directory authorities. In
21669 either case, it's better to use the more modern, better maintained
21670 algorithm, with reasonable defaults for the weights. Closes
21672 - Remove the --disable-curve25519 configure option. Relays and
21673 clients now are required to support curve25519 and the
21675 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
21676 used to be deprecated synonyms for "StrictNodes", are now marked
21677 obsolete. Resolves ticket 12226.
21678 - Clients don't understand the BadDirectory flag in the consensus
21679 anymore, and ignore it.
21682 - Refactor the function that chooses guard nodes so that it can more
21683 easily be tested; write some tests for it.
21684 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
21685 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
21686 - Create unit tests for format_time_interval(). With bug 13393.
21687 - Add unit tests for tor_timegm signed overflow, tor_timegm and
21688 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
21689 tests (visible) fixes in bug 13476.
21690 - Add a "coverage-html" make target to generate HTML-visualized
21691 coverage results when building with --enable-coverage. (Requires
21692 lcov.) Patch from Kevin Murray.
21693 - Enable the backtrace handler (where supported) when running the
21695 - Revise all unit tests that used the legacy test_* macros to
21696 instead use the recommended tt_* macros. This patch was generated
21697 with coccinelle, to avoid manual errors. Closes ticket 13119.
21699 o Distribution (systemd):
21700 - systemd unit file: only allow tor to write to /var/lib/tor and
21701 /var/log/tor. The rest of the filesystem is accessible for reading
21702 only. Patch by intrigeri; resolves ticket 12751.
21703 - systemd unit file: ensure that the process and all its children
21704 can never gain new privileges. Patch by intrigeri; resolves
21706 - systemd unit file: set up /var/run/tor as writable for the Tor
21707 service. Patch by intrigeri; resolves ticket 13196.
21709 o Removed features (directory authorities):
21710 - Remove code that prevented authorities from listing Tor relays
21711 affected by CVE-2011-2769 as guards. These relays are already
21712 rejected altogether due to the minimum version requirement of
21713 0.2.3.16-alpha. Closes ticket 13152.
21714 - The "AuthDirRejectUnlisted" option no longer has any effect, as
21715 the fingerprints file (approved-routers) has been deprecated.
21716 - Directory authorities do not support being Naming dirauths anymore.
21717 The "NamingAuthoritativeDir" config option is now obsolete.
21718 - Directory authorities do not support giving out the BadDirectory
21720 - Directory authorities no longer advertise or support consensus
21721 methods 1 through 12 inclusive. These consensus methods were
21722 obsolete and/or insecure: maintaining the ability to support them
21723 served no good purpose. Implements part of proposal 215; closes
21726 o Testing (test-network.sh):
21727 - Stop using "echo -n", as some shells' built-in echo doesn't
21728 support "-n". Instead, use "/bin/echo -n". Partially fixes
21730 - Stop an apparent test-network hang when used with make -j2. Fixes
21732 - Add a --delay option to test-network.sh, which configures the
21733 delay before the chutney network tests for data transmission.
21734 Partially implements ticket 13161.
21737 Changes in version 0.2.5.10 - 2014-10-24
21738 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
21740 It adds several new security features, including improved
21741 denial-of-service resistance for relays, new compiler hardening
21742 options, and a system-call sandbox for hardened installations on Linux
21743 (requires seccomp2). The controller protocol has several new features,
21744 resolving IPv6 addresses should work better than before, and relays
21745 should be a little more CPU-efficient. We've added support for more
21746 OpenBSD and FreeBSD transparent proxy types. We've improved the build
21747 system and testing infrastructure to allow unit testing of more parts
21748 of the Tor codebase. Finally, we've addressed several nagging pluggable
21749 transport usability issues, and included numerous other small bugfixes
21750 and features mentioned below.
21752 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
21753 have accumulated many known flaws; everyone should upgrade.
21755 o Deprecated versions:
21756 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
21757 attention for some while.
21760 Changes in version 0.2.5.9-rc - 2014-10-20
21761 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
21762 series. It disables SSL3 in response to the recent "POODLE" attack
21763 (even though POODLE does not affect Tor). It also works around a crash
21764 bug caused by some operating systems' response to the "POODLE" attack
21765 (which does affect Tor). It also contains a few miscellaneous fixes.
21767 o Major security fixes:
21768 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21769 today support TLS 1.0 or later, so we can safely turn off support
21770 for this old (and insecure) protocol. Fixes bug 13426.
21772 o Major bugfixes (openssl bug workaround):
21773 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21774 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21775 13471. This is a workaround for an OpenSSL bug.
21778 - Disable the sandbox name resolver cache when running tor-resolve:
21779 tor-resolve doesn't use the sandbox code, and turning it on was
21780 breaking attempts to do tor-resolve on a non-default server on
21781 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
21783 o Compilation fixes:
21784 - Build and run correctly on systems like OpenBSD-current that have
21785 patched OpenSSL to remove get_cipher_by_char and/or its
21786 implementations. Fixes issue 13325.
21788 o Downgraded warnings:
21789 - Downgrade the severity of the 'unexpected sendme cell from client'
21790 from 'warn' to 'protocol warning'. Closes ticket 8093.
21793 Changes in version 0.2.4.25 - 2014-10-20
21794 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
21795 (even though POODLE does not affect Tor). It also works around a crash
21796 bug caused by some operating systems' response to the "POODLE" attack
21797 (which does affect Tor).
21799 o Major security fixes (also in 0.2.5.9-rc):
21800 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21801 today support TLS 1.0 or later, so we can safely turn off support
21802 for this old (and insecure) protocol. Fixes bug 13426.
21804 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
21805 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21806 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21807 13471. This is a workaround for an OpenSSL bug.
21810 Changes in version 0.2.5.8-rc - 2014-09-22
21811 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
21812 series. It fixes a bug that affects consistency and speed when
21813 connecting to hidden services, and it updates the location of one of
21814 the directory authorities.
21817 - Clients now send the correct address for their chosen rendezvous
21818 point when trying to access a hidden service. They used to send
21819 the wrong address, which would still work some of the time because
21820 they also sent the identity digest of the rendezvous point, and if
21821 the hidden service happened to try connecting to the rendezvous
21822 point from a relay that already had a connection open to it,
21823 the relay would reuse that connection. Now connections to hidden
21824 services should be more robust and faster. Also, this bug meant
21825 that clients were leaking to the hidden service whether they were
21826 on a little-endian (common) or big-endian (rare) system, which for
21827 some users might have reduced their anonymity. Fixes bug 13151;
21828 bugfix on 0.2.1.5-alpha.
21830 o Directory authority changes:
21831 - Change IP address for gabelmoo (v3 directory authority).
21834 Changes in version 0.2.4.24 - 2014-09-22
21835 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
21836 connecting to hidden services, and it updates the location of one of
21837 the directory authorities.
21840 - Clients now send the correct address for their chosen rendezvous
21841 point when trying to access a hidden service. They used to send
21842 the wrong address, which would still work some of the time because
21843 they also sent the identity digest of the rendezvous point, and if
21844 the hidden service happened to try connecting to the rendezvous
21845 point from a relay that already had a connection open to it,
21846 the relay would reuse that connection. Now connections to hidden
21847 services should be more robust and faster. Also, this bug meant
21848 that clients were leaking to the hidden service whether they were
21849 on a little-endian (common) or big-endian (rare) system, which for
21850 some users might have reduced their anonymity. Fixes bug 13151;
21851 bugfix on 0.2.1.5-alpha.
21853 o Directory authority changes:
21854 - Change IP address for gabelmoo (v3 directory authority).
21856 o Minor features (geoip):
21857 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21861 Changes in version 0.2.5.7-rc - 2014-09-11
21862 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
21863 release series, and some long-standing bugs related to ORPort reachability
21864 testing and failure to send CREATE cells. It is the first release
21865 candidate for the Tor 0.2.5.x series.
21867 o Major bugfixes (client, startup):
21868 - Start making circuits as soon as DisabledNetwork is turned off.
21869 When Tor started with DisabledNetwork set, it would correctly
21870 conclude that it shouldn't build circuits, but it would mistakenly
21871 cache this conclusion, and continue believing it even when
21872 DisableNetwork is set to 0. Fixes the bug introduced by the fix
21873 for bug 11200; bugfix on 0.2.5.4-alpha.
21874 - Resume expanding abbreviations for command-line options. The fix
21875 for bug 4647 accidentally removed our hack from bug 586 that
21876 rewrote HashedControlPassword to __HashedControlSessionPassword
21877 when it appears on the commandline (which allowed the user to set
21878 her own HashedControlPassword in the torrc file while the
21879 controller generates a fresh session password for each run). Fixes
21880 bug 12948; bugfix on 0.2.5.1-alpha.
21881 - Warn about attempts to run hidden services and relays in the same
21882 process: that's probably not a good idea. Closes ticket 12908.
21884 o Major bugfixes (relay):
21885 - Avoid queuing or sending destroy cells for circuit ID zero when we
21886 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
21887 Found and fixed by "cypherpunks".
21888 - Fix ORPort reachability detection on relays running behind a
21889 proxy, by correctly updating the "local" mark on the controlling
21890 channel when changing the address of an or_connection_t after the
21891 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
21893 o Minor features (bridge):
21894 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
21895 cookie file for the ExtORPort g+r by default.
21897 o Minor features (geoip):
21898 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21901 o Minor bugfixes (logging):
21902 - Reduce the log severity of the "Pluggable transport proxy does not
21903 provide any needed transports and will not be launched." message,
21904 since Tor Browser includes several ClientTransportPlugin lines in
21905 its torrc-defaults file, leading every Tor Browser user who looks
21906 at her logs to see these notices and wonder if they're dangerous.
21907 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
21908 - Downgrade "Unexpected onionskin length after decryption" warning
21909 to a protocol-warn, since there's nothing relay operators can do
21910 about a client that sends them a malformed create cell. Resolves
21911 bug 12996; bugfix on 0.0.6rc1.
21912 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
21913 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
21914 - When logging information about an EXTEND2 or EXTENDED2 cell, log
21915 their names correctly. Fixes part of bug 12700; bugfix
21917 - When logging information about a relay cell whose command we don't
21918 recognize, log its command as an integer. Fixes part of bug 12700;
21919 bugfix on 0.2.1.10-alpha.
21920 - Escape all strings from the directory connection before logging
21921 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
21923 o Minor bugfixes (controller):
21924 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
21925 bug 12864; bugfix on 0.2.5.1-alpha.
21926 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
21927 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
21930 o Minor bugfixes (compilation):
21931 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
21932 bugfix on 0.2.5.5-alpha.
21933 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
21934 0.2.5.1-alpha. Patch from "NewEraCracker".
21935 - In routerlist_assert_ok(), don't take the address of a
21936 routerinfo's cache_info member unless that routerinfo is non-NULL.
21937 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
21938 - Fix a large number of false positive warnings from the clang
21939 analyzer static analysis tool. This should make real warnings
21940 easier for clang analyzer to find. Patch from "teor". Closes
21943 o Distribution (systemd):
21944 - Verify configuration file via ExecStartPre in the systemd unit
21945 file. Patch from intrigeri; resolves ticket 12730.
21946 - Explicitly disable RunAsDaemon in the systemd unit file. Our
21947 current systemd unit uses "Type = simple", so systemd does not
21948 expect tor to fork. If the user has "RunAsDaemon 1" in their
21949 torrc, then things won't work as expected. This is e.g. the case
21950 on Debian (and derivatives), since there we pass "--defaults-torrc
21951 /usr/share/tor/tor-service-defaults-torrc" (that contains
21952 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
21956 - Adjust the URLs in the README to refer to the new locations of
21957 several documents on the website. Fixes bug 12830. Patch from
21959 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
21963 Changes in version 0.2.5.6-alpha - 2014-07-28
21964 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
21965 risk from guard rotation, and fixes a variety of other issues to get
21966 us closer to a release candidate.
21968 o Major features (also in 0.2.4.23):
21969 - Make the number of entry guards configurable via a new
21970 NumEntryGuards consensus parameter, and the number of directory
21971 guards configurable via a new NumDirectoryGuards consensus
21972 parameter. Implements ticket 12688.
21974 o Major bugfixes (also in 0.2.4.23):
21975 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
21976 implementation that caused incorrect results on 32-bit
21977 implementations when certain malformed inputs were used along with
21978 a small class of private ntor keys. This bug does not currently
21979 appear to allow an attacker to learn private keys or impersonate a
21980 Tor server, but it could provide a means to distinguish 32-bit Tor
21981 implementations from 64-bit Tor implementations. Fixes bug 12694;
21982 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
21986 - Perform circuit cleanup operations even when circuit
21987 construction operations are disabled (because the network is
21988 disabled, or because there isn't enough directory information).
21989 Previously, when we were not building predictive circuits, we
21990 were not closing expired circuits either. Fixes bug 8387; bugfix on
21991 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
21992 became more strict about when we have "enough directory information
21993 to build circuits".
21996 - Authorities now assign the Guard flag to the fastest 25% of the
21997 network (it used to be the fastest 50%). Also raise the consensus
21998 weight that guarantees the Guard flag from 250 to 2000. For the
21999 current network, this results in about 1100 guards, down from 2500.
22000 This step paves the way for moving the number of entry guards
22001 down to 1 (proposal 236) while still providing reasonable expected
22002 performance for most users. Implements ticket 12690.
22003 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22005 - Slightly enhance the diagnostic message for bug 12184.
22007 o Minor bugfixes (also in 0.2.4.23):
22008 - Warn and drop the circuit if we receive an inbound 'relay early'
22009 cell. Those used to be normal to receive on hidden service circuits
22010 due to bug 1038, but the buggy Tor versions are long gone from
22011 the network so we can afford to resume watching for them. Resolves
22012 the rest of bug 1038; bugfix on 0.2.1.19.
22013 - Correct a confusing error message when trying to extend a circuit
22014 via the control protocol but we don't know a descriptor or
22015 microdescriptor for one of the specified relays. Fixes bug 12718;
22016 bugfix on 0.2.3.1-alpha.
22019 - Fix compilation when building with bufferevents enabled. (This
22020 configuration is still not expected to work, however.)
22021 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
22022 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
22024 - Compile correctly with builds and forks of OpenSSL (such as
22025 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
22026 0.2.1.1-alpha. Patch from "dhill".
22029 Changes in version 0.2.4.23 - 2014-07-28
22030 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
22031 guard rotation, and also backports several important fixes from the
22032 Tor 0.2.5 alpha release series.
22035 - Clients now look at the "usecreatefast" consensus parameter to
22036 decide whether to use CREATE_FAST or CREATE cells for the first hop
22037 of their circuit. This approach can improve security on connections
22038 where Tor's circuit handshake is stronger than the available TLS
22039 connection security levels, but the tradeoff is more computational
22040 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22041 - Make the number of entry guards configurable via a new
22042 NumEntryGuards consensus parameter, and the number of directory
22043 guards configurable via a new NumDirectoryGuards consensus
22044 parameter. Implements ticket 12688.
22047 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
22048 implementation that caused incorrect results on 32-bit
22049 implementations when certain malformed inputs were used along with
22050 a small class of private ntor keys. This bug does not currently
22051 appear to allow an attacker to learn private keys or impersonate a
22052 Tor server, but it could provide a means to distinguish 32-bit Tor
22053 implementations from 64-bit Tor implementations. Fixes bug 12694;
22054 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
22058 - Warn and drop the circuit if we receive an inbound 'relay early'
22059 cell. Those used to be normal to receive on hidden service circuits
22060 due to bug 1038, but the buggy Tor versions are long gone from
22061 the network so we can afford to resume watching for them. Resolves
22062 the rest of bug 1038; bugfix on 0.2.1.19.
22063 - Correct a confusing error message when trying to extend a circuit
22064 via the control protocol but we don't know a descriptor or
22065 microdescriptor for one of the specified relays. Fixes bug 12718;
22066 bugfix on 0.2.3.1-alpha.
22067 - Avoid an illegal read from stack when initializing the TLS
22068 module using a version of OpenSSL without all of the ciphers
22069 used by the v2 link handshake. Fixes bug 12227; bugfix on
22070 0.2.4.8-alpha. Found by "starlight".
22073 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
22077 Changes in version 0.2.5.5-alpha - 2014-06-18
22078 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
22079 0.2.5.x release series, including a couple of DoS issues, some
22080 performance regressions, a large number of bugs affecting the Linux
22081 seccomp2 sandbox code, and various other bugfixes. It also adds
22082 diagnostic bugfixes for a few tricky issues that we're trying to
22085 o Major features (security, traffic analysis resistance):
22086 - Several major improvements to the algorithm used to decide when to
22087 close TLS connections. Previous versions of Tor closed connections
22088 at a fixed interval after the last time a non-padding cell was
22089 sent over the connection, regardless of the target of the
22090 connection. Now, we randomize the intervals by adding up to 50% of
22091 their base value, we measure the length of time since connection
22092 last had at least one circuit, and we allow connections to known
22093 ORs to remain open a little longer (15 minutes instead of 3
22094 minutes minimum). These changes should improve Tor's resistance
22095 against some kinds of traffic analysis, and lower some overhead
22096 from needlessly closed connections. Fixes ticket 6799.
22097 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
22099 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
22100 - Fix a memory leak that could occur if a microdescriptor parse
22101 fails during the tokenizing step. This bug could enable a memory
22102 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22105 o Major bugfixes (security, directory authorities):
22106 - Directory authorities now include a digest of each relay's
22107 identity key as a part of its microdescriptor.
22109 This is a workaround for bug 11743 (reported by "cypherpunks"),
22110 where Tor clients do not support receiving multiple
22111 microdescriptors with the same SHA256 digest in the same
22112 consensus. When clients receive a consensus like this, they only
22113 use one of the relays. Without this fix, a hostile relay could
22114 selectively disable some client use of target relays by
22115 constructing a router descriptor with a different identity and the
22116 same microdescriptor parameters and getting the authorities to
22117 list it in a microdescriptor consensus. This fix prevents an
22118 attacker from causing a microdescriptor collision, because the
22119 router's identity is not forgeable.
22121 o Major bugfixes (relay):
22122 - Use a direct dirport connection when uploading non-anonymous
22123 descriptors to the directory authorities. Previously, relays would
22124 incorrectly use tunnel connections under a fairly wide variety of
22125 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
22126 - When a circuit accidentally has the same circuit ID for its
22127 forward and reverse direction, correctly detect the direction of
22128 cells using that circuit. Previously, this bug made roughly one
22129 circuit in a million non-functional. Fixes bug 12195; this is a
22130 bugfix on every version of Tor.
22132 o Major bugfixes (client, pluggable transports):
22133 - When managing pluggable transports, use OS notification facilities
22134 to learn if they have crashed, and don't attempt to kill any
22135 process that has already exited. Fixes bug 8746; bugfix
22138 o Minor features (diagnostic):
22139 - When logging a warning because of bug 7164, additionally check the
22140 hash table for consistency (as proposed on ticket 11737). This may
22141 help diagnose bug 7164.
22142 - When we log a heartbeat, log how many one-hop circuits we have
22143 that are at least 30 minutes old, and log status information about
22144 a few of them. This is an attempt to track down bug 8387.
22145 - When encountering an unexpected CR while writing text to a file on
22146 Windows, log the name of the file. Should help diagnosing
22148 - Give more specific warnings when a client notices that an onion
22149 handshake has failed. Fixes ticket 9635.
22150 - Add significant new logging code to attempt to diagnose bug 12184,
22151 where relays seem to run out of available circuit IDs.
22152 - Improve the diagnostic log message for bug 8387 even further to
22153 try to improve our odds of figuring out why one-hop directory
22154 circuits sometimes do not get closed.
22156 o Minor features (security, memory management):
22157 - Memory allocation tricks (mempools and buffer freelists) are now
22158 disabled by default. You can turn them back on with
22159 --enable-mempools and --enable-buf-freelists respectively. We're
22160 disabling these features because malloc performance is good enough
22161 on most platforms, and a similar feature in OpenSSL exacerbated
22162 exploitation of the Heartbleed attack. Resolves ticket 11476.
22164 o Minor features (security):
22165 - Apply the secure SipHash-2-4 function to the hash table mapping
22166 circuit IDs and channels to circuits. We missed this one when we
22167 were converting all the other hash functions to use SipHash back
22168 in 0.2.5.3-alpha. Resolves ticket 11750.
22170 o Minor features (build):
22171 - The configure script has a --disable-seccomp option to turn off
22172 support for libseccomp on systems that have it, in case it (or
22173 Tor's use of it) is broken. Resolves ticket 11628.
22175 o Minor features (other):
22176 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
22179 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
22180 - When running a hidden service, do not allow TunneledDirConns 0;
22181 this will keep the hidden service from running, and also
22182 make it publish its descriptors directly over HTTP. Fixes bug 10849;
22183 bugfix on 0.2.1.1-alpha.
22185 o Minor bugfixes (performance):
22186 - Avoid a bug where every successful connection made us recompute
22187 the flag telling us whether we have sufficient information to
22188 build circuits. Previously, we would forget our cached value
22189 whenever we successfully opened a channel (or marked a router as
22190 running or not running for any other reason), regardless of
22191 whether we had previously believed the router to be running. This
22192 forced us to run an expensive update operation far too often.
22193 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
22194 - Avoid using tor_memeq() for checking relay cell integrity. This
22195 removes a possible performance bottleneck. Fixes part of bug
22196 12169; bugfix on 0.2.1.31.
22198 o Minor bugfixes (compilation):
22199 - Fix compilation of test_status.c when building with MVSC. Bugfix
22200 on 0.2.5.4-alpha. Patch from Gisle Vanem.
22201 - Resolve GCC complaints on OpenBSD about discarding constness in
22202 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
22203 on 0.1.1.23. Patch from Dana Koch.
22204 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
22205 treatment of long and time_t as comparable types. Fixes part of
22206 bug 11633. Patch from Dana Koch.
22207 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
22208 11623; bugfix on 0.2.5.3-alpha.
22209 - When deciding whether to build the 64-bit curve25519
22210 implementation, detect platforms where we can compile 128-bit
22211 arithmetic but cannot link it. Fixes bug 11729; bugfix on
22212 0.2.4.8-alpha. Patch from "conradev".
22213 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
22214 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
22215 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
22218 o Minor bugfixes (Directory server):
22219 - When sending a compressed set of descriptors or microdescriptors,
22220 make sure to finalize the zlib stream. Previously, we would write
22221 all the compressed data, but if the last descriptor we wanted to
22222 send was missing or too old, we would not mark the stream as
22223 finished. This caused problems for decompression tools. Fixes bug
22224 11648; bugfix on 0.1.1.23.
22226 o Minor bugfixes (Linux seccomp sandbox):
22227 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
22228 11622; bugfix on 0.2.5.1-alpha.
22229 - Avoid crashing when re-opening listener ports with the seccomp
22230 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
22231 - Avoid crashing with the seccomp sandbox enabled along with
22232 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
22233 - When we receive a SIGHUP with the sandbox enabled, correctly
22234 support rotating our log files. Fixes bug 12032; bugfix
22236 - Avoid crash when running with sandboxing enabled and
22237 DirReqStatistics not disabled. Fixes bug 12035; bugfix
22239 - Fix a "BUG" warning when trying to write bridge-stats files with
22240 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
22242 - Prevent the sandbox from crashing on startup when run with the
22243 --enable-expensive-hardening configuration option. Fixes bug
22244 11477; bugfix on 0.2.5.4-alpha.
22245 - When running with DirPortFrontPage and sandboxing both enabled,
22246 reload the DirPortFrontPage correctly when restarting. Fixes bug
22247 12028; bugfix on 0.2.5.1-alpha.
22248 - Don't try to enable the sandbox when using the Tor binary to check
22249 its configuration, hash a passphrase, or so on. Doing so was
22250 crashing on startup for some users. Fixes bug 11609; bugfix
22252 - Avoid warnings when running with sandboxing and node statistics
22253 enabled at the same time. Fixes part of 12064; bugfix on
22254 0.2.5.1-alpha. Patch from Michael Wolf.
22255 - Avoid warnings when running with sandboxing enabled at the same
22256 time as cookie authentication, hidden services, or directory
22257 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
22258 - Do not allow options that require calls to exec to be enabled
22259 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
22260 bug 12043; bugfix on 0.2.5.1-alpha.
22261 - Handle failures in getpwnam()/getpwuid() when running with the
22262 User option set and the Linux syscall sandbox enabled. Fixes bug
22263 11946; bugfix on 0.2.5.1-alpha.
22264 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
22265 to avoid calling getaddrinfo() after installing the sandbox
22266 filters. Previously, it preloaded a cache with the IPv4 address
22267 for our hostname, and nothing else. Now, it loads the cache with
22268 every address that it used to initialize the Tor process. Fixes
22269 bug 11970; bugfix on 0.2.5.1-alpha.
22271 o Minor bugfixes (pluggable transports):
22272 - Enable the ExtORPortCookieAuthFile option, to allow changing the
22273 default location of the authentication token for the extended OR
22274 Port as used by sever-side pluggable transports. We had
22275 implemented this option before, but the code to make it settable
22276 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
22277 - Avoid another 60-second delay when starting Tor in a pluggable-
22278 transport-using configuration when we already have cached
22279 descriptors for our bridges. Fixes bug 11965; bugfix
22282 o Minor bugfixes (client):
22283 - Avoid "Tried to open a socket with DisableNetwork set" warnings
22284 when starting a client with bridges configured and DisableNetwork
22285 set. (Tor launcher starts Tor with DisableNetwork set the first
22286 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
22288 o Minor bugfixes (testing):
22289 - The Python parts of the test scripts now work on Python 3 as well
22290 as Python 2, so systems where '/usr/bin/python' is Python 3 will
22291 no longer have the tests break. Fixes bug 11608; bugfix
22293 - When looking for versions of python that we could run the tests
22294 with, check for "python2.7" and "python3.3"; previously we were
22295 only looking for "python", "python2", and "python3". Patch from
22296 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
22297 - Fix all valgrind warnings produced by the unit tests. There were
22298 over a thousand memory leak warnings previously, mostly produced
22299 by forgetting to free things in the unit test code. Fixes bug
22300 11618, bugfixes on many versions of Tor.
22302 o Minor bugfixes (tor-fw-helper):
22303 - Give a correct log message when tor-fw-helper fails to launch.
22304 (Previously, we would say something like "tor-fw-helper sent us a
22305 string we could not parse".) Fixes bug 9781; bugfix
22308 o Minor bugfixes (relay, threading):
22309 - Check return code on spawn_func() in cpuworker code, so that we
22310 don't think we've spawned a nonworking cpuworker and write junk to
22311 it forever. Fix related to bug 4345; bugfix on all released Tor
22312 versions. Found by "skruffy".
22313 - Use a pthread_attr to make sure that spawn_func() cannot return an
22314 error while at the same time launching a thread. Fix related to
22315 bug 4345; bugfix on all released Tor versions. Reported
22318 o Minor bugfixes (relay, oom prevention):
22319 - Correctly detect the total available system memory. We tried to do
22320 this in 0.2.5.4-alpha, but the code was set up to always return an
22321 error value, even on success. Fixes bug 11805; bugfix
22324 o Minor bugfixes (relay, other):
22325 - We now drop CREATE cells for already-existent circuit IDs and for
22326 zero-valued circuit IDs, regardless of other factors that might
22327 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22329 - Avoid an illegal read from stack when initializing the TLS module
22330 using a version of OpenSSL without all of the ciphers used by the
22331 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22333 - When rejecting DATA cells for stream_id zero, still count them
22334 against the circuit's deliver window so that we don't fail to send
22335 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22337 o Minor bugfixes (logging):
22338 - Fix a misformatted log message about delayed directory fetches.
22339 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22340 - Squelch a spurious LD_BUG message "No origin circuit for
22341 successful SOCKS stream" in certain hidden service failure cases;
22345 - Include a tor.service file in contrib/dist for use with systemd.
22346 Some distributions will be able to use this file unmodified;
22347 others will need to tweak it, or write their own. Patch from Jamie
22348 Nguyen; resolves ticket 8368.
22351 - Clean up several option names in the manpage to match their real
22352 names, add the missing documentation for a couple of testing and
22353 directory authority options, remove the documentation for a
22354 V2-directory fetching option that no longer exists. Resolves
22356 - Correct the documentation so that it lists the correct directory
22357 for the stats files. (They are in a subdirectory called "stats",
22359 - In the manpage, move more authority-only options into the
22360 directory authority section so that operators of regular directory
22361 caches don't get confused.
22364 - The contrib directory has been sorted and tidied. Before, it was
22365 an unsorted dumping ground for useful and not-so-useful things.
22366 Now, it is divided based on functionality, and the items which
22367 seemed to be nonfunctional or useless have been removed. Resolves
22368 ticket 8966; based on patches from "rl1987".
22371 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
22372 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
22373 - The TunnelDirConns and PreferTunnelledDirConns options no longer
22374 exist; tunneled directory connections have been available since
22375 0.1.2.5-alpha, and turning them off is not a good idea. This is a
22376 brute-force fix for 10849, where "TunnelDirConns 0" would break
22380 Changes in version 0.2.4.22 - 2014-05-16
22381 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
22382 alpha release series. These include blocking all authority signing
22383 keys that may have been affected by the OpenSSL "heartbleed" bug,
22384 choosing a far more secure set of TLS ciphersuites by default, closing
22385 a couple of memory leaks that could be used to run a target relay out
22386 of RAM, and several others.
22388 o Major features (security, backport from 0.2.5.4-alpha):
22389 - Block authority signing keys that were used on authorities
22390 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22391 don't have any evidence that these keys _were_ compromised; we're
22392 doing this to be prudent.) Resolves ticket 11464.
22394 o Major bugfixes (security, OOM):
22395 - Fix a memory leak that could occur if a microdescriptor parse
22396 fails during the tokenizing step. This bug could enable a memory
22397 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22400 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
22401 - The relay ciphersuite list is now generated automatically based on
22402 uniform criteria, and includes all OpenSSL ciphersuites with
22403 acceptable strength and forward secrecy. Previously, we had left
22404 some perfectly fine ciphersuites unsupported due to omission or
22405 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22406 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22407 - Relays now trust themselves to have a better view than clients of
22408 which TLS ciphersuites are better than others. (Thanks to bug
22409 11513, the relay list is now well-considered, whereas the client
22410 list has been chosen mainly for anti-fingerprinting purposes.)
22411 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22412 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22413 AES128. Resolves ticket 11528.
22414 - Clients now try to advertise the same list of ciphersuites as
22415 Firefox 28. This change enables selection of (fast) GCM
22416 ciphersuites, disables some strange old ciphers, and stops
22417 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22418 Resolves ticket 11438.
22420 o Minor bugfixes (configuration, security):
22421 - When running a hidden service, do not allow TunneledDirConns 0:
22422 trying to set that option together with a hidden service would
22423 otherwise prevent the hidden service from running, and also make
22424 it publish its descriptors directly over HTTP. Fixes bug 10849;
22425 bugfix on 0.2.1.1-alpha.
22427 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
22428 - Avoid sending a garbage value to the controller when a circuit is
22429 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22431 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
22432 - Stop leaking memory when we successfully resolve a PTR record.
22433 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22435 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
22436 - Avoid 60-second delays in the bootstrapping process when Tor is
22437 launching for a second time while using bridges. Fixes bug 9229;
22438 bugfix on 0.2.0.3-alpha.
22440 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
22441 - Give the correct URL in the warning message when trying to run a
22442 relay on an ancient version of Windows. Fixes bug 9393.
22444 o Minor bugfixes (compilation):
22445 - Fix a compilation error when compiling with --disable-curve25519.
22446 Fixes bug 9700; bugfix on 0.2.4.17-rc.
22449 - Downgrade the warning severity for the the "md was still
22450 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
22451 for trying to diagnose this bug, and the current warning in
22452 earlier versions of tor achieves nothing useful. Addresses warning
22455 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
22456 - When we run out of usable circuit IDs on a channel, log only one
22457 warning for the whole channel, and describe how many circuits
22458 there were on the channel. Fixes part of ticket 11553.
22460 o Minor features (security, backport from 0.2.5.4-alpha):
22461 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
22462 leave the default at 8GBytes), to better support Raspberry Pi
22463 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
22465 o Documentation (backport from 0.2.5.4-alpha):
22466 - Correctly document that we search for a system torrc file before
22467 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22471 Changes in version 0.2.5.4-alpha - 2014-04-25
22472 Tor 0.2.5.4-alpha includes several security and performance
22473 improvements for clients and relays, including blacklisting authority
22474 signing keys that were used while susceptible to the OpenSSL
22475 "heartbleed" bug, fixing two expensive functions on busy relays,
22476 improved TLS ciphersuite preference lists, support for run-time
22477 hardening on compilers that support AddressSanitizer, and more work on
22478 the Linux sandbox code.
22480 There are also several usability fixes for clients (especially clients
22481 that use bridges), two new TransPort protocols supported (one on
22482 OpenBSD, one on FreeBSD), and various other bugfixes.
22484 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
22485 have accumulated many known flaws; everyone should upgrade.
22487 o Major features (security):
22488 - If you don't specify MaxMemInQueues yourself, Tor now tries to
22489 pick a good value based on your total system memory. Previously,
22490 the default was always 8 GB. You can still override the default by
22491 setting MaxMemInQueues yourself. Resolves ticket 11396.
22492 - Block authority signing keys that were used on authorities
22493 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22494 don't have any evidence that these keys _were_ compromised; we're
22495 doing this to be prudent.) Resolves ticket 11464.
22497 o Major features (relay performance):
22498 - Speed up server-side lookups of rendezvous and introduction point
22499 circuits by using hashtables instead of linear searches. These
22500 functions previously accounted between 3 and 7% of CPU usage on
22501 some busy relays. Resolves ticket 9841.
22502 - Avoid wasting CPU when extending a circuit over a channel that is
22503 nearly out of circuit IDs. Previously, we would do a linear scan
22504 over possible circuit IDs before finding one or deciding that we
22505 had exhausted our possibilities. Now, we try at most 64 random
22506 circuit IDs before deciding that we probably won't succeed. Fixes
22507 a possible root cause of ticket 11553.
22509 o Major features (seccomp2 sandbox, Linux only):
22510 - The seccomp2 sandbox can now run a test network for multiple hours
22511 without crashing. The sandbox is still experimental, and more bugs
22512 will probably turn up. To try it, enable "Sandbox 1" on a Linux
22513 host. Resolves ticket 11351.
22514 - Strengthen sandbox code: the sandbox can now test the arguments
22515 for rename(), and blocks _sysctl() entirely. Resolves another part
22517 - When the sandbox blocks a system call, it now tries to log a stack
22518 trace before exiting. Resolves ticket 11465.
22520 o Major bugfixes (TLS cipher selection):
22521 - The relay ciphersuite list is now generated automatically based on
22522 uniform criteria, and includes all OpenSSL ciphersuites with
22523 acceptable strength and forward secrecy. Previously, we had left
22524 some perfectly fine ciphersuites unsupported due to omission or
22525 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22526 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22527 - Relays now trust themselves to have a better view than clients of
22528 which TLS ciphersuites are better than others. (Thanks to bug
22529 11513, the relay list is now well-considered, whereas the client
22530 list has been chosen mainly for anti-fingerprinting purposes.)
22531 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22532 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22533 AES128. Resolves ticket 11528.
22534 - Clients now try to advertise the same list of ciphersuites as
22535 Firefox 28. This change enables selection of (fast) GCM
22536 ciphersuites, disables some strange old ciphers, and stops
22537 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22538 Resolves ticket 11438.
22540 o Major bugfixes (bridge client):
22541 - Avoid 60-second delays in the bootstrapping process when Tor is
22542 launching for a second time while using bridges. Fixes bug 9229;
22543 bugfix on 0.2.0.3-alpha.
22545 o Minor features (transparent proxy, *BSD):
22546 - Support FreeBSD's ipfw firewall interface for TransPort ports on
22547 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
22548 10267; patch from "yurivict".
22549 - Support OpenBSD's divert-to rules with the pf firewall for
22550 transparent proxy ports. To enable it, set "TransProxyType
22551 pf-divert". This allows Tor to run a TransPort transparent proxy
22552 port on OpenBSD 4.4 or later without root privileges. See the
22553 pf.conf(5) manual page for information on configuring pf to use
22554 divert-to rules. Closes ticket 10896; patch from Dana Koch.
22556 o Minor features (security):
22557 - New --enable-expensive-hardening option to enable security
22558 hardening options that consume nontrivial amounts of CPU and
22559 memory. Right now, this includes AddressSanitizer and UbSan, which
22560 are supported in newer versions of GCC and Clang. Closes ticket
22563 o Minor features (log verbosity):
22564 - Demote the message that we give when a flushing connection times
22565 out for too long from NOTICE to INFO. It was usually meaningless.
22566 Resolves ticket 5286.
22567 - Don't log so many notice-level bootstrapping messages at startup
22568 about downloading descriptors. Previously, we'd log a notice
22569 whenever we learned about more routers. Now, we only log a notice
22570 at every 5% of progress. Fixes bug 9963.
22571 - Warn less verbosely when receiving a malformed
22572 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
22573 - When we run out of usable circuit IDs on a channel, log only one
22574 warning for the whole channel, and describe how many circuits
22575 there were on the channel. Fixes part of ticket 11553.
22577 o Minor features (relay):
22578 - If a circuit timed out for at least 3 minutes, check if we have a
22579 new external IP address, and publish a new descriptor with the new
22580 IP address if it changed. Resolves ticket 2454.
22582 o Minor features (controller):
22583 - Make the entire exit policy available from the control port via
22584 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
22586 - Because of the fix for ticket 11396, the real limit for memory
22587 usage may no longer match the configured MaxMemInQueues value. The
22588 real limit is now exposed via GETINFO limits/max-mem-in-queues.
22590 o Minor features (bridge client):
22591 - Report a more useful failure message when we can't connect to a
22592 bridge because we don't have the right pluggable transport
22593 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
22595 o Minor features (diagnostic):
22596 - Add more log messages to diagnose bug 7164, which causes
22597 intermittent "microdesc_free() called but md was still referenced"
22598 warnings. We now include more information, to figure out why we
22599 might be cleaning a microdescriptor for being too old if it's
22600 still referenced by a live node_t object.
22602 o Minor bugfixes (client, DNSPort):
22603 - When using DNSPort, try to respond to AAAA requests with AAAA
22604 answers. Previously, we hadn't looked at the request type when
22605 deciding which answer type to prefer. Fixes bug 10468; bugfix on
22607 - When receiving a DNS query for an unsupported record type, reply
22608 with no answer rather than with a NOTIMPL error. This behavior
22609 isn't correct either, but it will break fewer client programs, we
22610 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
22613 o Minor bugfixes (exit relay):
22614 - Stop leaking memory when we successfully resolve a PTR record.
22615 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22617 o Minor bugfixes (bridge client):
22618 - Stop accepting bridge lines containing hostnames. Doing so would
22619 cause clients to perform DNS requests on the hostnames, which was
22620 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
22621 - Avoid a 60-second delay in the bootstrapping process when a Tor
22622 client with pluggable transports re-reads its configuration at
22623 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
22625 o Minor bugfixes (client, logging during bootstrap):
22626 - Warn only once if we start logging in an unsafe way. Previously,
22627 we complain as many times as we had problems. Fixes bug 9870;
22628 bugfix on 0.2.5.1-alpha.
22629 - Only report the first fatal bootstrap error on a given OR
22630 connection. This stops us from telling the controller bogus error
22631 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
22632 - Be more helpful when trying to run sandboxed on Linux without
22633 libseccomp. Instead of saying "Sandbox is not implemented on this
22634 platform", we now explain that we need to be built with
22635 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
22636 - Avoid generating spurious warnings when starting with
22637 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
22640 o Minor bugfixes (closing OR connections):
22641 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
22642 check if it's an or_connection_t and correctly call
22643 connection_or_close_for_error() rather than
22644 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
22646 - When closing all connections on setting DisableNetwork to 1, use
22647 connection_or_close_normally() rather than closing OR connections
22648 out from under the channel layer. Fixes bug 11306; bugfix on
22651 o Minor bugfixes (controller):
22652 - Avoid sending a garbage value to the controller when a circuit is
22653 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22655 o Minor bugfixes (tor-fw-helper):
22656 - Allow tor-fw-helper to build again by adding src/ext to its
22657 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
22659 o Minor bugfixes (bridges):
22660 - Avoid potential crashes or bad behavior when launching a
22661 server-side managed proxy with ORPort or ExtORPort temporarily
22662 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
22664 o Minor bugfixes (platform-specific):
22665 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
22666 bug 11426; bugfix on 0.2.5.3-alpha.
22667 - When dumping a malformed directory object to disk, save it in
22668 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
22670 - Don't report failures from make_socket_reuseable() on incoming
22671 sockets on OSX: this can happen when incoming connections close
22672 early. Fixes bug 10081.
22674 o Minor bugfixes (trivial memory leaks):
22675 - Fix a small memory leak when signing a directory object. Fixes bug
22676 11275; bugfix on 0.2.4.13-alpha.
22677 - Free placeholder entries in our circuit table at exit; fixes a
22678 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
22679 - Don't re-initialize a second set of OpenSSL mutexes when starting
22680 up. Previously, we'd make one set of mutexes, and then immediately
22681 replace them with another. Fixes bug 11726; bugfix on
22683 - Resolve some memory leaks found by coverity in the unit tests, on
22684 exit in tor-gencert, and on a failure to compute digests for our
22685 own keys when generating a v3 networkstatus vote. These leaks
22686 should never have affected anyone in practice.
22688 o Minor bugfixes (hidden service):
22689 - Only retry attempts to connect to a chosen rendezvous point 8
22690 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
22692 o Minor bugfixes (misc code correctness):
22693 - Fix various instances of undefined behavior in channeltls.c,
22694 tor_memmem(), and eventdns.c that would cause us to construct
22695 pointers to memory outside an allocated object. (These invalid
22696 pointers were not accessed, but C does not even allow them to
22697 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
22698 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
22699 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
22700 fix some miscellaneous errors in our tests and codebase. Fixes bug
22701 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
22702 - Always check return values for unlink, munmap, UnmapViewOfFile;
22703 check strftime return values more often. In some cases all we can
22704 do is report a warning, but this may help prevent deeper bugs from
22705 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
22707 - Fix numerous warnings from the clang "scan-build" static analyzer.
22708 Some of these are programming style issues; some of them are false
22709 positives that indicated awkward code; some are undefined behavior
22710 cases related to constructing (but not using) invalid pointers;
22711 some are assumptions about API behavior; some are (harmlessly)
22712 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
22713 correct; and one or two are genuine bugs that weren't reachable
22714 from the rest of the program. Fixes bug 8793; bugfixes on many,
22718 - Build the torify.1 manpage again. Previously, we were only trying
22719 to build it when also building tor-fw-helper. That's why we didn't
22720 notice that we'd broken the ability to build it. Fixes bug 11321;
22721 bugfix on 0.2.5.1-alpha.
22722 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
22723 11061; bugfix on 0.2.4.7-alpha.
22724 - Correctly document that we search for a system torrc file before
22725 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22727 - Resolve warnings from Doxygen.
22729 o Code simplifications and refactoring:
22730 - Remove is_internal_IP() function. Resolves ticket 4645.
22731 - Remove unused function circuit_dump_by_chan from circuitlist.c.
22732 Closes issue 9107; patch from "marek".
22733 - Change our use of the ENUM_BF macro to avoid declarations that
22736 o Deprecated versions:
22737 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
22738 attention for some while. Directory authorities no longer accept
22739 descriptors from relays running any version of Tor prior to Tor
22740 0.2.3.16-alpha. Resolves ticket 11149.
22743 - New macros in test.h to simplify writing mock-functions for unit
22744 tests. Part of ticket 11507. Patch from Dana Koch.
22745 - Complete tests for the status.c module. Resolves ticket 11507.
22746 Patch from Dana Koch.
22749 - Remove all code for the long unused v1 directory protocol.
22750 Resolves ticket 11070.
22753 Changes in version 0.2.5.3-alpha - 2014-03-22
22754 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
22755 two new anti-DoS features for Tor relays, resolves a bug that kept
22756 SOCKS5 support for IPv6 from working, fixes several annoying usability
22757 issues for bridge users, and removes more old code for unused
22760 The Tor 0.2.5.x release series is now in patch-freeze: no feature
22761 patches not already written will be considered for inclusion in 0.2.5.x.
22763 o Major features (relay security, DoS-resistance):
22764 - When deciding whether we have run out of memory and we need to
22765 close circuits, also consider memory allocated in buffers for
22766 streams attached to each circuit.
22768 This change, which extends an anti-DoS feature introduced in
22769 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
22770 better resist more memory-based DoS attacks than before. Since the
22771 MaxMemInCellQueues option now applies to all queues, it is renamed
22772 to MaxMemInQueues. This feature fixes bug 10169.
22773 - Avoid hash-flooding denial-of-service attacks by using the secure
22774 SipHash-2-4 hash function for our hashtables. Without this
22775 feature, an attacker could degrade performance of a targeted
22776 client or server by flooding their data structures with a large
22777 number of entries to be stored at the same hash table position,
22778 thereby slowing down the Tor instance. With this feature, hash
22779 table positions are derived from a randomized cryptographic key,
22780 and an attacker cannot predict which entries will collide. Closes
22782 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
22783 the default at 8GBytes), to better support Raspberry Pi users. Fixes
22784 bug 9686; bugfix on 0.2.4.14-alpha.
22786 o Minor features (bridges, pluggable transports):
22787 - Bridges now write the SHA1 digest of their identity key
22788 fingerprint (that is, a hash of a hash of their public key) to
22789 notice-level logs, and to a new hashed-fingerprint file. This
22790 information will help bridge operators look up their bridge in
22791 Globe and similar tools. Resolves ticket 10884.
22792 - Improve the message that Tor displays when running as a bridge
22793 using pluggable transports without an Extended ORPort listener.
22794 Also, log the message in the log file too. Resolves ticket 11043.
22796 o Minor features (other):
22797 - Add a new option, PredictedPortsRelevanceTime, to control how long
22798 after having received a request to connect to a given port Tor
22799 will try to keep circuits ready in anticipation of future requests
22800 for that port. Patch from "unixninja92"; implements ticket 9176.
22801 - Generate a warning if any ports are listed in the SocksPolicy,
22802 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
22803 AuthDirBadExit options. (These options only support address
22804 ranges.) Fixes part of ticket 11108.
22805 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
22808 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
22809 - Build without warnings under clang 3.4. (We have some macros that
22810 define static functions only some of which will get used later in
22811 the module. Starting with clang 3.4, these give a warning unless the
22812 unused attribute is set on them.) Resolves ticket 10904.
22813 - Fix build warnings about missing "a2x" comment when building the
22814 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22815 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22817 o Minor bugfixes (client):
22818 - Improve the log message when we can't connect to a hidden service
22819 because all of the hidden service directory nodes hosting its
22820 descriptor are excluded. Improves on our fix for bug 10722, which
22821 was a bugfix on 0.2.0.10-alpha.
22822 - Raise a control port warning when we fail to connect to all of
22823 our bridges. Previously, we didn't inform the controller, and
22824 the bootstrap process would stall. Fixes bug 11069; bugfix on
22826 - Exit immediately when a process-owning controller exits.
22827 Previously, tor relays would wait for a little while after their
22828 controller exited, as if they had gotten an INT signal -- but this
22829 was problematic, since there was no feedback for the user. To do a
22830 clean shutdown, controllers should send an INT signal and give Tor
22831 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
22832 - Stop attempting to connect to bridges before our pluggable
22833 transports are configured (harmless but resulted in some erroneous
22834 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
22835 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
22836 generating incorrect SOCKS5 responses, and confusing client
22837 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
22839 o Minor bugfixes (relays and bridges):
22840 - Avoid crashing on a malformed resolv.conf file when running a
22841 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
22842 - Non-exit relays no longer launch mock DNS requests to check for
22843 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
22844 non-exit relays stopped servicing DNS requests. Fixes bug 965;
22845 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
22846 - Bridges now report complete directory request statistics. Related
22847 to bug 5824; bugfix on 0.2.2.1-alpha.
22848 - Bridges now never collect statistics that were designed for
22849 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
22850 - Stop giving annoying warning messages when we decide not to launch
22851 a pluggable transport proxy that we don't need (because there are
22852 no bridges configured to use it). Resolves ticket 5018; bugfix
22854 - Give the correct URL in the warning message when trying to run a
22855 relay on an ancient version of Windows. Fixes bug 9393.
22857 o Minor bugfixes (backtrace support):
22858 - Support automatic backtraces on more platforms by using the
22859 "-fasynchronous-unwind-tables" compiler option. This option is
22860 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
22861 is on by default and table generation is not. This doesn't yet
22862 add Windows support; only Linux, OSX, and some BSDs are affected.
22863 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
22864 - Avoid strange behavior if two threads hit failed assertions at the
22865 same time and both try to log backtraces at once. (Previously, if
22866 this had happened, both threads would have stored their intermediate
22867 results in the same buffer, and generated junk outputs.) Reported by
22868 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
22869 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
22870 0.2.5.2-alpha; patch from Nick Hopper.
22872 o Minor bugfixes (unit tests):
22873 - Fix a small bug in the unit tests that might have made the tests
22874 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
22875 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
22878 - Remove all remaining code related to version-0 hidden service
22879 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
22880 the rest of bug 10841.
22883 - Document in the manpage that "KBytes" may also be written as
22884 "kilobytes" or "KB", that "Kbits" may also be written as
22885 "kilobits", and so forth. Closes ticket 9222.
22886 - Document that the ClientOnly config option overrides ORPort.
22887 Our old explanation made ClientOnly sound as though it did
22888 nothing at all. Resolves bug 9059.
22889 - Explain that SocksPolicy, DirPolicy, and similar options don't
22890 take port arguments. Fixes the other part of ticket 11108.
22891 - Fix a comment about the rend_server_descriptor_t.protocols field
22892 to more accurately describe its range. Also, make that field
22893 unsigned, to more accurately reflect its usage. Fixes bug 9099;
22894 bugfix on 0.2.1.5-alpha.
22895 - Fix the manpage's description of HiddenServiceAuthorizeClient:
22896 the maximum client name length is 16, not 19. Fixes bug 11118;
22897 bugfix on 0.2.1.6-alpha.
22899 o Code simplifications and refactoring:
22900 - Get rid of router->address, since in all cases it was just the
22901 string representation of router->addr. Resolves ticket 5528.
22903 o Test infrastructure:
22904 - Update to the latest version of tinytest.
22905 - Improve the tinytest implementation of string operation tests so
22906 that comparisons with NULL strings no longer crash the tests; they
22907 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
22910 Changes in version 0.2.4.21 - 2014-02-28
22911 Tor 0.2.4.21 further improves security against potential adversaries who
22912 find breaking 1024-bit crypto doable, and backports several stability
22913 and robustness patches from the 0.2.5 branch.
22915 o Major features (client security):
22916 - When we choose a path for a 3-hop circuit, make sure it contains
22917 at least one relay that supports the NTor circuit extension
22918 handshake. Otherwise, there is a chance that we're building
22919 a circuit that's worth attacking by an adversary who finds
22920 breaking 1024-bit crypto doable, and that chance changes the game
22921 theory. Implements ticket 9777.
22924 - Do not treat streams that fail with reason
22925 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
22926 since it could also indicate an ENETUNREACH connection error. Fixes
22927 part of bug 10777; bugfix on 0.2.4.8-alpha.
22929 o Code simplification and refactoring:
22930 - Remove data structures which were introduced to implement the
22931 CellStatistics option: they are now redundant with the new timestamp
22932 field in the regular packed_cell_t data structure, which we did
22933 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
22936 - Always clear OpenSSL bignums before freeing them -- even bignums
22937 that don't contain secrets. Resolves ticket 10793. Patch by
22939 - Build without warnings under clang 3.4. (We have some macros that
22940 define static functions only some of which will get used later in
22941 the module. Starting with clang 3.4, these give a warning unless the
22942 unused attribute is set on them.) Resolves ticket 10904.
22943 - Update geoip and geoip6 files to the February 7 2014 Maxmind
22944 GeoLite2 Country database.
22947 - Set the listen() backlog limit to the largest actually supported
22948 on the system, not to the value in a header file. Fixes bug 9716;
22949 bugfix on every released Tor.
22950 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
22951 exit node as a NOROUTE error, not an INTERNAL error, since they
22952 can apparently happen when trying to connect to the wrong sort
22953 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
22954 - Fix build warnings about missing "a2x" comment when building the
22955 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22956 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22957 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
22958 not entirely remove it from the connection lists. Fixes bug 9602;
22959 bugfix on 0.2.4.4-alpha.
22960 - Fix a segmentation fault in our benchmark code when running with
22961 Fedora's OpenSSL package, or any other OpenSSL that provides
22962 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
22963 - Turn "circuit handshake stats since last time" log messages into a
22964 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
22966 o Documentation fixes:
22967 - Document that all but one DirPort entry must have the NoAdvertise
22968 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
22971 Changes in version 0.2.5.2-alpha - 2014-02-13
22972 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
22973 like the "poor random number generation" fix and the "building too many
22974 circuits" fix. It also further improves security against potential
22975 adversaries who find breaking 1024-bit crypto doable, and launches
22976 pluggable transports on demand (which gets us closer to integrating
22977 pluggable transport support by default -- not to be confused with Tor
22978 bundles enabling pluggable transports and bridges by default).
22980 o Major features (client security):
22981 - When we choose a path for a 3-hop circuit, make sure it contains
22982 at least one relay that supports the NTor circuit extension
22983 handshake. Otherwise, there is a chance that we're building
22984 a circuit that's worth attacking by an adversary who finds
22985 breaking 1024-bit crypto doable, and that chance changes the game
22986 theory. Implements ticket 9777.
22987 - Clients now look at the "usecreatefast" consensus parameter to
22988 decide whether to use CREATE_FAST or CREATE cells for the first hop
22989 of their circuit. This approach can improve security on connections
22990 where Tor's circuit handshake is stronger than the available TLS
22991 connection security levels, but the tradeoff is more computational
22992 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22994 o Major features (bridges):
22995 - Don't launch pluggable transport proxies if we don't have any
22996 bridges configured that would use them. Now we can list many
22997 pluggable transports, and Tor will dynamically start one when it
22998 hears a bridge address that needs it. Resolves ticket 5018.
22999 - The bridge directory authority now assigns status flags (Stable,
23000 Guard, etc) to bridges based on thresholds calculated over all
23001 Running bridges. Now bridgedb can finally make use of its features
23002 to e.g. include at least one Stable bridge in its answers. Fixes
23005 o Major features (other):
23006 - Extend ORCONN controller event to include an "ID" parameter,
23007 and add four new controller event types CONN_BW, CIRC_BW,
23008 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
23009 The new events are emitted in private Tor networks only, with the
23010 goal of being able to better track performance and load during
23011 full-network simulations. Implements proposal 218 and ticket 7359.
23012 - On some platforms (currently: recent OSX versions, glibc-based
23013 platforms that support the ELF format, and a few other
23014 Unix-like operating systems), Tor can now dump stack traces
23015 when a crash occurs or an assertion fails. By default, traces
23016 are dumped to stderr (if possible) and to any logs that are
23017 reporting errors. Implements ticket 9299.
23020 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
23021 not entirely remove it from the connection lists. Fixes bug 9602;
23022 bugfix on 0.2.4.4-alpha.
23023 - Do not treat streams that fail with reason
23024 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
23025 since it could also indicate an ENETUNREACH connection error. Fixes
23026 part of bug 10777; bugfix on 0.2.4.8-alpha.
23028 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23029 - Do not allow OpenSSL engines to replace the PRNG, even when
23030 HardwareAccel is set. The only default builtin PRNG engine uses
23031 the Intel RDRAND instruction to replace the entire PRNG, and
23032 ignores all attempts to seed it with more entropy. That's
23033 cryptographically stupid: the right response to a new alleged
23034 entropy source is never to discard all previously used entropy
23035 sources. Fixes bug 10402; works around behavior introduced in
23036 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23038 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23039 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23040 - Avoid launching spurious extra circuits when a stream is pending.
23041 This fixes a bug where any circuit that _wasn't_ unusable for new
23042 streams would be treated as if it were, causing extra circuits to
23043 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23045 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23046 - No longer stop reading or writing on cpuworker connections when
23047 our rate limiting buckets go empty. Now we should handle circuit
23048 handshake requests more promptly. Resolves bug 9731.
23049 - Stop trying to bootstrap all our directory information from
23050 only our first guard. Discovered while fixing bug 9946; bugfix
23053 o Minor features (bridges, pluggable transports):
23054 - Add threshold cutoffs to the networkstatus document created by
23055 the Bridge Authority. Fixes bug 1117.
23056 - On Windows, spawn background processes using the CREATE_NO_WINDOW
23057 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
23058 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
23059 Vidalia set this option for us.) Implements ticket 10297.
23061 o Minor features (security):
23062 - Always clear OpenSSL bignums before freeing them -- even bignums
23063 that don't contain secrets. Resolves ticket 10793. Patch by
23066 o Minor features (config options and command line):
23067 - Add an --allow-missing-torrc commandline option that tells Tor to
23068 run even if the configuration file specified by -f is not available.
23069 Implements ticket 10060.
23070 - Add support for the TPROXY transparent proxying facility on Linux.
23071 See documentation for the new TransProxyType option for more
23072 details. Implementation by "thomo". Closes ticket 10582.
23074 o Minor features (controller):
23075 - Add a new "HS_DESC" controller event that reports activities
23076 related to hidden service descriptors. Resolves ticket 8510.
23077 - New "DROPGUARDS" controller command to forget all current entry
23078 guards. Not recommended for ordinary use, since replacing guards
23079 too frequently makes several attacks easier. Resolves ticket 9934;
23082 o Minor features (build):
23083 - Assume that a user using ./configure --host wants to cross-compile,
23084 and give an error if we cannot find a properly named
23085 tool-chain. Add a --disable-tool-name-check option to proceed
23086 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
23087 - If we run ./configure and the compiler recognizes -fstack-protector
23088 but the linker rejects it, warn the user about a potentially missing
23089 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
23091 o Minor features (testing):
23092 - If Python is installed, "make check" now runs extra tests beyond
23093 the unit test scripts.
23094 - When bootstrapping a test network, sometimes very few relays get
23095 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
23096 specify a set of relays which should be voted Guard regardless of
23097 their uptime or bandwidth. Addresses ticket 9206.
23099 o Minor features (log messages):
23100 - When ServerTransportPlugin is set on a bridge, Tor can write more
23101 useful statistics about bridge use in its extrainfo descriptors,
23102 but only if the Extended ORPort ("ExtORPort") is set too. Add a
23103 log message to inform the user in this case. Resolves ticket 9651.
23104 - When receiving a new controller connection, log the origin address.
23105 Resolves ticket 9698; patch from "sigpipe".
23106 - When logging OpenSSL engine status at startup, log the status of
23107 more engines. Fixes ticket 10043; patch from Joshua Datko.
23108 - Turn "circuit handshake stats since last time" log messages into a
23109 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
23111 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23112 - Improve the circuit queue out-of-memory handler. Previously, when
23113 we ran low on memory, we'd close whichever circuits had the most
23114 queued cells. Now, we close those that have the *oldest* queued
23115 cells, on the theory that those are most responsible for us
23116 running low on memory. Based on analysis from a forthcoming paper
23117 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23118 - Generate bootstrapping status update events correctly when fetching
23119 microdescriptors. Fixes bug 9927.
23120 - Update to the October 2 2013 Maxmind GeoLite Country database.
23122 o Minor bugfixes (clients):
23123 - When closing a channel that has already been open, do not close
23124 pending circuits that were waiting to connect to the same relay.
23125 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
23128 o Minor bugfixes (relays):
23129 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
23130 exit node as a NOROUTE error, not an INTERNAL error, since they
23131 can apparently happen when trying to connect to the wrong sort
23132 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
23134 o Minor bugfixes (bridges):
23135 - Fix a bug where the first connection works to a bridge that uses a
23136 pluggable transport with client-side parameters, but we don't send
23137 the client-side parameters on subsequent connections. (We don't
23138 use any pluggable transports with client-side parameters yet,
23139 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
23140 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
23142 o Minor bugfixes (node selection):
23143 - If ExcludeNodes is set, consider non-excluded hidden service
23144 directory servers before excluded ones. Do not consider excluded
23145 hidden service directory servers at all if StrictNodes is
23146 set. (Previously, we would sometimes decide to connect to those
23147 servers, and then realize before we initiated a connection that
23148 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
23149 Reported by "mr-4".
23150 - If we set the ExitNodes option but it doesn't include any nodes
23151 that have the Exit flag, we would choose not to bootstrap. Now we
23152 bootstrap so long as ExitNodes includes nodes which can exit to
23153 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
23155 o Minor bugfixes (controller and command-line):
23156 - If changing a config option via "setconf" fails in a recoverable
23157 way, we used to nonetheless write our new control ports to the
23158 file described by the "ControlPortWriteToFile" option. Now we only
23159 write out that file if we successfully switch to the new config
23160 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
23161 - When a command-line option such as --version or --help that
23162 ordinarily implies --hush appears on the command line along with
23163 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
23164 only if it appeared later on the command line. Fixes bug 9578;
23165 bugfix on 0.2.5.1-alpha.
23167 o Minor bugfixes (code correctness):
23168 - Previously we used two temporary files when writing descriptors to
23169 disk; now we only use one. Fixes bug 1376.
23170 - Remove an erroneous (but impossible and thus harmless) pointer
23171 comparison that would have allowed compilers to skip a bounds
23172 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
23173 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
23174 - Fix an always-true assertion in pluggable transports code so it
23175 actually checks what it was trying to check. Fixes bug 10046;
23176 bugfix on 0.2.3.9-alpha. Found by "dcb".
23178 o Minor bugfixes (protocol correctness):
23179 - When receiving a VERSIONS cell with an odd number of bytes, close
23180 the connection immediately since the cell is malformed. Fixes bug
23181 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
23184 o Minor bugfixes (build):
23185 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
23186 turned off (that is, without support for v2 link handshakes). Fixes
23187 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
23188 - Fix compilation warnings and startup issues when running with
23189 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
23191 - Fix compilation on Solaris 9, which didn't like us having an
23192 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
23194 o Minor bugfixes (testing):
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.
23199 o Minor bugfixes (log messages):
23200 - Fix a bug where clients using bridges would report themselves
23201 as 50% bootstrapped even without a live consensus document.
23202 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
23203 - Suppress a warning where, if there's only one directory authority
23204 in the network, we would complain that votes and signatures cannot
23205 be uploaded to other directory authorities. Fixes bug 10842;
23206 bugfix on 0.2.2.26-beta.
23207 - Report bootstrapping progress correctly when we're downloading
23208 microdescriptors. We had updated our "do we have enough microdescs
23209 to begin building circuits?" logic most recently in 0.2.4.10-alpha
23210 (see bug 5956), but we left the bootstrap status event logic at
23211 "how far through getting 1/4 of them are we?" Fixes bug 9958;
23212 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
23214 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
23215 - Avoid a crash bug when starting with a corrupted microdescriptor
23216 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23217 - If we fail to dump a previously cached microdescriptor to disk, avoid
23218 freeing duplicate data later on. Fixes bug 10423; bugfix on
23219 0.2.4.13-alpha. Spotted by "bobnomnom".
23221 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23222 - Correctly log long IPv6 exit policies, instead of truncating them
23223 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23224 - Our default TLS ecdhe groups were backwards: we meant to be using
23225 P224 for relays (for performance win) and P256 for bridges (since
23226 it is more common in the wild). Instead we had it backwards. After
23227 reconsideration, we decided that the default should be P256 on all
23228 hosts, since its security is probably better, and since P224 is
23229 reportedly used quite little in the wild. Found by "skruffy" on
23230 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23231 - Free directory authority certificate download statuses on exit
23232 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23234 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23235 - If the guard we choose first doesn't answer, we would try the
23236 second guard, but once we connected to the second guard we would
23237 abandon it and retry the first one, slowing down bootstrapping.
23238 The fix is to treat all our initially chosen guards as acceptable
23239 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23240 - Fix an assertion failure that would occur when disabling the
23241 ORPort setting on a running Tor process while accounting was
23242 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23243 - When examining the list of network interfaces to find our address,
23244 do not consider non-running or disabled network interfaces. Fixes
23245 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23246 - Avoid an off-by-one error when checking buffer boundaries when
23247 formatting the exit status of a pluggable transport helper.
23248 This is probably not an exploitable bug, but better safe than
23249 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23252 o Removed code and features:
23253 - Clients now reject any directory authority certificates lacking
23254 a dir-key-crosscert element. These have been included since
23255 0.2.1.9-alpha, so there's no real reason for them to be optional
23256 any longer. Completes proposal 157. Resolves ticket 10162.
23257 - Remove all code that existed to support the v2 directory system,
23258 since there are no longer any v2 directory authorities. Resolves
23260 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
23261 options, which were used for designating authorities as "Hidden
23262 service authorities". There has been no use of hidden service
23263 authorities since 0.2.2.1-alpha, when we stopped uploading or
23264 downloading v0 hidden service descriptors. Fixes bug 10881; also
23265 part of a fix for bug 10841.
23267 o Code simplification and refactoring:
23268 - Remove some old fallback code designed to keep Tor clients working
23269 in a network with only two working relays. Elsewhere in the code we
23270 have long since stopped supporting such networks, so there wasn't
23271 much point in keeping it around. Addresses ticket 9926.
23272 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
23273 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
23274 - Remove data structures which were introduced to implement the
23275 CellStatistics option: they are now redundant with the addition
23276 of a timestamp to the regular packed_cell_t data structure, which
23277 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
23280 o Documentation (man page) fixes:
23281 - Update manpage to describe some of the files you can expect to
23282 find in Tor's DataDirectory. Addresses ticket 9839.
23283 - Document that all but one DirPort entry must have the NoAdvertise
23284 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
23286 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
23287 - Clarify the usage and risks of setting the ContactInfo torrc line
23288 for your relay or bridge. Resolves ticket 9854.
23289 - Add anchors to the manpage so we can link to the html version of
23290 the documentation for specific options. Resolves ticket 9866.
23291 - Replace remaining references to DirServer in man page and
23292 log entries. Resolves ticket 10124.
23295 - Make the "tor-gencert" tool used by directory authority operators
23296 create 2048-bit signing keys by default (rather than 1024-bit, since
23297 1024-bit is uncomfortably small these days). Addresses ticket 10324.
23300 Changes in version 0.2.4.20 - 2013-12-22
23301 Tor 0.2.4.20 fixes potentially poor random number generation for users
23302 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
23303 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
23304 and 4) have no state file in their DataDirectory (as would happen on
23305 first start). Users who generated relay or hidden service identity
23306 keys in such a situation should discard them and generate new ones.
23308 This release also fixes a logic error that caused Tor clients to build
23309 many more preemptive circuits than they actually need.
23312 - Do not allow OpenSSL engines to replace the PRNG, even when
23313 HardwareAccel is set. The only default builtin PRNG engine uses
23314 the Intel RDRAND instruction to replace the entire PRNG, and
23315 ignores all attempts to seed it with more entropy. That's
23316 cryptographically stupid: the right response to a new alleged
23317 entropy source is never to discard all previously used entropy
23318 sources. Fixes bug 10402; works around behavior introduced in
23319 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
23321 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
23322 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
23323 - Avoid launching spurious extra circuits when a stream is pending.
23324 This fixes a bug where any circuit that _wasn't_ unusable for new
23325 streams would be treated as if it were, causing extra circuits to
23326 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23329 - Avoid a crash bug when starting with a corrupted microdescriptor
23330 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23331 - If we fail to dump a previously cached microdescriptor to disk, avoid
23332 freeing duplicate data later on. Fixes bug 10423; bugfix on
23333 0.2.4.13-alpha. Spotted by "bobnomnom".
23336 Changes in version 0.2.4.19 - 2013-12-11
23337 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23338 (1986-2013). Aaron worked on diverse projects including helping to guide
23339 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23340 transparency to the U.S government's PACER documents, and contributing
23341 design and development for Tor and Tor2Web. Aaron was one of the latest
23342 martyrs in our collective fight for civil liberties and human rights,
23343 and his death is all the more painful because he was one of us.
23345 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
23346 a new circuit handshake and link encryption that use ECC to provide
23347 better security and efficiency; makes relays better manage circuit
23348 creation requests; uses "directory guards" to reduce client enumeration
23349 risks; makes bridges collect and report statistics about the pluggable
23350 transports they support; cleans up and improves our geoip database;
23351 gets much closer to IPv6 support for clients, bridges, and relays; makes
23352 directory authorities use measured bandwidths rather than advertised
23353 ones when computing flags and thresholds; disables client-side DNS
23354 caching to reduce tracking risks; and fixes a big bug in bridge
23355 reachability testing. This release introduces two new design
23356 abstractions in the code: a new "channel" abstraction between circuits
23357 and or_connections to allow for implementing alternate relay-to-relay
23358 transports, and a new "circuitmux" abstraction storing the queue of
23359 circuits for a channel. The release also includes many stability,
23360 security, and privacy fixes.
23363 Changes in version 0.2.4.18-rc - 2013-11-16
23364 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
23365 series. It takes a variety of fixes from the 0.2.5.x branch to improve
23366 stability, performance, and better handling of edge cases.
23369 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23370 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23371 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23372 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23373 them to solve bug 6033.)
23376 - No longer stop reading or writing on cpuworker connections when
23377 our rate limiting buckets go empty. Now we should handle circuit
23378 handshake requests more promptly. Resolves bug 9731.
23379 - If we are unable to save a microdescriptor to the journal, do not
23380 drop it from memory and then reattempt downloading it. Fixes bug
23381 9645; bugfix on 0.2.2.6-alpha.
23382 - Stop trying to bootstrap all our directory information from
23383 only our first guard. Discovered while fixing bug 9946; bugfix
23385 - The new channel code sometimes lost track of in-progress circuits,
23386 causing long-running clients to stop building new circuits. The
23387 fix is to always call circuit_n_chan_done(chan, 0) from
23388 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23390 o Minor bugfixes (on 0.2.4.x):
23391 - Correctly log long IPv6 exit policies, instead of truncating them
23392 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23393 - Our default TLS ecdhe groups were backwards: we meant to be using
23394 P224 for relays (for performance win) and P256 for bridges (since
23395 it is more common in the wild). Instead we had it backwards. After
23396 reconsideration, we decided that the default should be P256 on all
23397 hosts, since its security is probably better, and since P224 is
23398 reportedly used quite little in the wild. Found by "skruffy" on
23399 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23400 - Free directory authority certificate download statuses on exit
23401 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23403 o Minor bugfixes (on 0.2.3.x and earlier):
23404 - If the guard we choose first doesn't answer, we would try the
23405 second guard, but once we connected to the second guard we would
23406 abandon it and retry the first one, slowing down bootstrapping.
23407 The fix is to treat all our initially chosen guards as acceptable
23408 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23409 - Fix an assertion failure that would occur when disabling the
23410 ORPort setting on a running Tor process while accounting was
23411 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23412 - When examining the list of network interfaces to find our address,
23413 do not consider non-running or disabled network interfaces. Fixes
23414 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23415 - Avoid an off-by-one error when checking buffer boundaries when
23416 formatting the exit status of a pluggable transport helper.
23417 This is probably not an exploitable bug, but better safe than
23418 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23421 o Minor features (protecting client timestamps):
23422 - Clients no longer send timestamps in their NETINFO cells. These were
23423 not used for anything, and they provided one small way for clients
23424 to be distinguished from each other as they moved from network to
23425 network or behind NAT. Implements part of proposal 222.
23426 - Clients now round timestamps in INTRODUCE cells down to the nearest
23427 10 minutes. If a new Support022HiddenServices option is set to 0, or
23428 if it's set to "auto" and the feature is disabled in the consensus,
23429 the timestamp is sent as 0 instead. Implements part of proposal 222.
23430 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23431 a big deal from a security point of view, but it achieves no actual
23432 good purpose, and isn't needed. Implements part of proposal 222.
23433 - Reduce down accuracy of timestamps in hidden service descriptors.
23434 Implements part of proposal 222.
23436 o Minor features (other):
23437 - Improve the circuit queue out-of-memory handler. Previously, when
23438 we ran low on memory, we'd close whichever circuits had the most
23439 queued cells. Now, we close those that have the *oldest* queued
23440 cells, on the theory that those are most responsible for us
23441 running low on memory. Based on analysis from a forthcoming paper
23442 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23443 - Generate bootstrapping status update events correctly when fetching
23444 microdescriptors. Fixes bug 9927.
23445 - Update to the October 2 2013 Maxmind GeoLite Country database.
23447 o Documentation fixes:
23448 - Clarify the usage and risks of setting the ContactInfo torrc line
23449 for your relay or bridge. Resolves ticket 9854.
23450 - Add anchors to the manpage so we can link to the html version of
23451 the documentation for specific options. Resolves ticket 9866.
23452 - Replace remaining references to DirServer in man page and
23453 log entries. Resolves ticket 10124.
23456 Changes in version 0.2.5.1-alpha - 2013-10-02
23457 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
23458 on Linux, allows bridges that offer pluggable transports to report usage
23459 statistics, fixes many issues to make testing easier, and provides
23460 a pile of minor features and bugfixes that have been waiting for a
23461 release of the new branch.
23463 This is the first alpha release in a new series, so expect there to
23464 be bugs. Users who would rather test out a more stable branch should
23465 stay with 0.2.4.x for now.
23467 o Major features (security):
23468 - Use the seccomp2 syscall filtering facility on Linux to limit
23469 which system calls Tor can invoke. This is an experimental,
23470 Linux-only feature to provide defense-in-depth against unknown
23471 attacks. To try turning it on, set "Sandbox 1" in your torrc
23472 file. Please be ready to report bugs. We hope to add support
23473 for better sandboxing in the future, including more fine-grained
23474 filters, better division of responsibility, and support for more
23475 platforms. This work has been done by Cristian-Matei Toader for
23476 Google Summer of Code.
23477 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23478 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23479 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23480 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23481 them to solve bug 6033.)
23483 o Major features (other):
23484 - Add support for passing arguments to managed pluggable transport
23485 proxies. Implements ticket 3594.
23486 - Bridges now track GeoIP information and the number of their users
23487 even when pluggable transports are in use, and report usage
23488 statistics in their extra-info descriptors. Resolves tickets 4773
23490 - Make testing Tor networks bootstrap better: lower directory fetch
23491 retry schedules and maximum interval without directory requests,
23492 and raise maximum download tries. Implements ticket 6752.
23493 - Add make target 'test-network' to run tests on a Chutney network.
23494 Implements ticket 8530.
23495 - The ntor handshake is now on-by-default, no matter what the
23496 directory authorities recommend. Implements ticket 8561.
23499 - Instead of writing destroy cells directly to outgoing connection
23500 buffers, queue them and intersperse them with other outgoing cells.
23501 This can prevent a set of resource starvation conditions where too
23502 many pending destroy cells prevent data cells from actually getting
23503 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
23504 bugfix on 0.2.0.1-alpha.
23505 - If we are unable to save a microdescriptor to the journal, do not
23506 drop it from memory and then reattempt downloading it. Fixes bug
23507 9645; bugfix on 0.2.2.6-alpha.
23508 - The new channel code sometimes lost track of in-progress circuits,
23509 causing long-running clients to stop building new circuits. The
23510 fix is to always call circuit_n_chan_done(chan, 0) from
23511 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23514 - Tor now builds each source file in two modes: a mode that avoids
23515 exposing identifiers needlessly, and another mode that exposes
23516 more identifiers for testing. This lets the compiler do better at
23517 optimizing the production code, while enabling us to take more
23518 radical measures to let the unit tests test things.
23519 - The production builds no longer include functions used only in
23520 the unit tests; all functions exposed from a module only for
23521 unit-testing are now static in production builds.
23522 - Add an --enable-coverage configuration option to make the unit
23523 tests (and a new src/or/tor-cov target) to build with gcov test
23527 - We now have rudimentary function mocking support that our unit
23528 tests can use to test functions in isolation. Function mocking
23529 lets the tests temporarily replace a function's dependencies with
23530 stub functions, so that the tests can check the function without
23531 invoking the other functions it calls.
23532 - Add more unit tests for the <circid,channel>->circuit map, and
23533 the destroy-cell-tracking code to fix bug 7912.
23534 - Unit tests for failing cases of the TAP onion handshake.
23535 - More unit tests for address-manipulation functions.
23537 o Minor features (protecting client timestamps):
23538 - Clients no longer send timestamps in their NETINFO cells. These were
23539 not used for anything, and they provided one small way for clients
23540 to be distinguished from each other as they moved from network to
23541 network or behind NAT. Implements part of proposal 222.
23542 - Clients now round timestamps in INTRODUCE cells down to the nearest
23543 10 minutes. If a new Support022HiddenServices option is set to 0, or
23544 if it's set to "auto" and the feature is disabled in the consensus,
23545 the timestamp is sent as 0 instead. Implements part of proposal 222.
23546 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23547 a big deal from a security point of view, but it achieves no actual
23548 good purpose, and isn't needed. Implements part of proposal 222.
23549 - Reduce down accuracy of timestamps in hidden service descriptors.
23550 Implements part of proposal 222.
23552 o Minor features (config options):
23553 - Config (torrc) lines now handle fingerprints which are missing
23554 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
23555 - Support a --dump-config option to print some or all of the
23556 configured options. Mainly useful for debugging the command-line
23557 option parsing code. Helps resolve ticket 4647.
23558 - Raise awareness of safer logging: notify user of potentially
23559 unsafe config options, like logging more verbosely than severity
23560 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
23561 - Add a new configuration option TestingV3AuthVotingStartOffset
23562 that bootstraps a network faster by changing the timing for
23563 consensus votes. Addresses ticket 8532.
23564 - Add a new torrc option "ServerTransportOptions" that allows
23565 bridge operators to pass configuration parameters to their
23566 pluggable transports. Resolves ticket 8929.
23567 - The config (torrc) file now accepts bandwidth and space limits in
23568 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
23569 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
23572 o Minor features (build):
23573 - Add support for `--library-versions` flag. Implements ticket 6384.
23574 - Return the "unexpected sendme" warnings to a warn severity, but make
23575 them rate limited, to help diagnose ticket 8093.
23576 - Detect a missing asciidoc, and warn the user about it, during
23577 configure rather than at build time. Fixes issue 6506. Patch from
23580 o Minor features (other):
23581 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
23582 sockets in a single system call. Implements ticket 5129.
23583 - Log current accounting state (bytes sent and received + remaining
23584 time for the current accounting period) in the relay's heartbeat
23585 message. Implements ticket 5526; patch from Peter Retzlaff.
23586 - Implement the TRANSPORT_LAUNCHED control port event that
23587 notifies controllers about new launched pluggable
23588 transports. Resolves ticket 5609.
23589 - If we're using the pure-C 32-bit curve25519_donna implementation
23590 of curve25519, build it with the -fomit-frame-pointer option to
23591 make it go faster on register-starved hosts. This improves our
23592 handshake performance by about 6% on i386 hosts without nacl.
23593 Closes ticket 8109.
23594 - Update to the September 4 2013 Maxmind GeoLite Country database.
23597 - Set the listen() backlog limit to the largest actually supported
23598 on the system, not to the value in a header file. Fixes bug 9716;
23599 bugfix on every released Tor.
23600 - No longer accept malformed http headers when parsing urls from
23601 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
23602 bugfix on 0.0.6pre1.
23603 - In munge_extrainfo_into_routerinfo(), check the return value of
23604 memchr(). This would have been a serious issue if we ever passed
23605 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
23607 - On the chance that somebody manages to build Tor on a
23608 platform where time_t is unsigned, correct the way that
23609 microdesc_add_to_cache() handles negative time arguments.
23610 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
23611 - Reject relative control socket paths and emit a warning. Previously,
23612 single-component control socket paths would be rejected, but Tor
23613 would not log why it could not validate the config. Fixes bug 9258;
23614 bugfix on 0.2.3.16-alpha.
23616 o Minor bugfixes (command line):
23617 - Use a single command-line parser for parsing torrc options on the
23618 command line and for finding special command-line options to avoid
23619 inconsistent behavior for torrc option arguments that have the same
23620 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
23622 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
23623 9573; bugfix on 0.0.9pre5.
23625 o Minor fixes (build, auxiliary programs):
23626 - Stop preprocessing the "torify" script with autoconf, since
23627 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
23629 - The tor-fw-helper program now follows the standard convention and
23630 exits with status code "0" on success. Fixes bug 9030; bugfix on
23631 0.2.3.1-alpha. Patch by Arlo Breault.
23632 - Corrected ./configure advice for what openssl dev package you should
23633 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
23635 o Minor code improvements:
23636 - Remove constants and tests for PKCS1 padding; it's insecure and
23637 shouldn't be used for anything new. Fixes bug 8792; patch
23639 - Remove instances of strcpy() from the unit tests. They weren't
23640 hurting anything, since they were only in the unit tests, but it's
23641 embarrassing to have strcpy() in the code at all, and some analysis
23642 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
23643 0.2.3.8-alpha. Patch from Arlo Breault.
23645 o Removed features:
23646 - Remove migration code from when we renamed the "cached-routers"
23647 file to "cached-descriptors" back in 0.2.0.8-alpha. This
23648 incidentally resolves ticket 6502 by cleaning up the related code
23649 a bit. Patch from Akshay Hebbar.
23651 o Code simplification and refactoring:
23652 - Extract the common duplicated code for creating a subdirectory
23653 of the data directory and writing to a file in it. Fixes ticket
23654 4282; patch from Peter Retzlaff.
23655 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
23656 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
23657 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
23658 - Add a set of accessor functions for the circuit timeout data
23659 structure. Fixes ticket 6153; patch from "piet".
23660 - Clean up exit paths from connection_listener_new(). Closes ticket
23661 8789. Patch from Arlo Breault.
23662 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
23663 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
23664 - Use a doubly-linked list to implement the global circuit list.
23665 Resolves ticket 9108. Patch from Marek Majkowski.
23666 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
23669 Changes in version 0.2.4.17-rc - 2013-09-05
23670 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
23671 series. It adds an emergency step to help us tolerate the massive
23672 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
23673 circuit-level handshakes now effectively jump the queue compared to
23674 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
23675 big bug hindering bridge reachability tests.
23678 - Relays now process the new "NTor" circuit-level handshake requests
23679 with higher priority than the old "TAP" circuit-level handshake
23680 requests. We still process some TAP requests to not totally starve
23681 0.2.3 clients when NTor becomes popular. A new consensus parameter
23682 "NumNTorsPerTAP" lets us tune the balance later if we need to.
23683 Implements ticket 9574.
23686 - If the circuit build timeout logic is disabled (via the consensus,
23687 or because we are an authority), then don't build testing circuits.
23688 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
23689 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
23690 previously they did not, which prevented them from receiving
23691 successful connections from relays for self-test or bandwidth
23692 testing. Also, when a relay is extending a circuit to a bridge,
23693 it needs to send a NETINFO cell, even when the bridge hasn't sent
23694 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
23695 - If the time to download the next old-style networkstatus is in
23696 the future, do not decline to consider whether to download the
23697 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
23701 - Avoid double-closing the listener socket in our socketpair()
23702 replacement (used on Windows) in the case where the addresses on
23703 our opened sockets don't match what we expected. Fixes bug 9400;
23704 bugfix on 0.0.2pre7. Found by Coverity.
23706 o Minor fixes (config options):
23707 - Avoid overflows when the user sets MaxCircuitDirtiness to a
23708 ridiculously high value, by imposing a (ridiculously high) 30-day
23709 maximum on MaxCircuitDirtiness.
23710 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
23711 message is logged at notice, not at info.
23712 - Warn and fail if a server is configured not to advertise any
23713 ORPorts at all. (We need *something* to put in our descriptor,
23714 or we just won't work.)
23717 - Track how many "TAP" and "NTor" circuit handshake requests we get,
23718 and how many we complete, and log it every hour to help relay
23719 operators follow trends in network load. Addresses ticket 9658.
23720 - Update to the August 7 2013 Maxmind GeoLite Country database.
23723 Changes in version 0.2.4.16-rc - 2013-08-10
23724 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
23725 series. It fixes several crash bugs in the 0.2.4 branch.
23728 - Fix a bug in the voting algorithm that could yield incorrect results
23729 when a non-naming authority declared too many flags. Fixes bug 9200;
23730 bugfix on 0.2.0.3-alpha.
23731 - Fix an uninitialized read that could in some cases lead to a remote
23732 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
23733 Anybody running a hidden service on the experimental 0.2.4.x
23734 branch should upgrade. (This is, so far as we know, unrelated to
23736 - Avoid an assertion failure when processing DNS replies without the
23737 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
23738 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
23739 0.2.4.15-rc. Found by stem integration tests.
23742 - Fix an invalid memory read that occurred when a pluggable
23743 transport proxy failed its configuration protocol.
23744 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
23745 - When evaluating whether to use a connection that we haven't
23746 decided is canonical using a recent link protocol version,
23747 decide that it's canonical only if it used address _does_
23748 match the desired address. Fixes bug 9309; bugfix on
23749 0.2.4.4-alpha. Reported by skruffy.
23750 - Make the default behavior of NumDirectoryGuards be to track
23751 NumEntryGuards. Now a user who changes only NumEntryGuards will get
23752 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
23753 - Fix a spurious compilation warning with some older versions of
23754 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
23757 - Update to the July 3 2013 Maxmind GeoLite Country database.
23760 Changes in version 0.2.4.15-rc - 2013-07-01
23761 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
23762 series. It fixes a few smaller bugs, but generally appears stable.
23763 Please test it and let us know whether it is!
23766 - When receiving a new configuration file via the control port's
23767 LOADCONF command, do not treat the defaults file as absent.
23768 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
23771 - Issue a warning when running with the bufferevents backend enabled.
23772 It's still not stable, and people should know that they're likely
23773 to hit unexpected problems. Closes ticket 9147.
23776 Changes in version 0.2.4.14-alpha - 2013-06-18
23777 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
23778 present in 0.2.4.13-alpha.
23781 - When we have too much memory queued in circuits (according to a new
23782 MaxMemInCellQueues option), close the circuits consuming the most
23783 memory. This prevents us from running out of memory as a relay if
23784 circuits fill up faster than they can be drained. Fixes bug 9063;
23785 bugfix on the 54th commit of Tor. This bug is a further fix beyond
23786 bug 6252, whose fix was merged into 0.2.3.21-rc.
23788 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
23789 where we tried to solve this issue simply by imposing an upper limit
23790 on the number of queued cells for a single circuit. That approach
23791 proved to be problematic, since there are ways to provoke clients to
23792 send a number of cells in excess of any such reasonable limit. Fixes
23793 bug 9072; bugfix on 0.2.4.13-alpha.
23795 - Limit hidden service descriptors to at most ten introduction
23796 points, to slow one kind of guard enumeration. Fixes bug 9002;
23797 bugfix on 0.1.1.11-alpha.
23800 Changes in version 0.2.4.13-alpha - 2013-06-14
23801 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
23802 vulnerabilities, makes socks5 username/password circuit isolation
23803 actually actually work (this time for sure!), and cleans up a bunch
23804 of other issues in preparation for a release candidate.
23806 o Major bugfixes (robustness):
23807 - Close any circuit that has too many cells queued on it. Fixes
23808 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
23809 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
23810 - Prevent the get_freelists() function from running off the end of
23811 the list of freelists if it somehow gets an unrecognized
23812 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
23814 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
23815 when an exit connection with optimistic data succeeds immediately
23816 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
23818 - Fix a directory authority crash bug when building a consensus
23819 using an older consensus as its basis. Fixes bug 8833. Bugfix
23823 - Avoid a memory leak where we would leak a consensus body when we
23824 find that a consensus which we couldn't previously verify due to
23825 missing certificates is now verifiable. Fixes bug 8719; bugfix
23827 - We used to always request authority certificates by identity digest,
23828 meaning we'd get the newest one even when we wanted one with a
23829 different signing key. Then we would complain about being given
23830 a certificate we already had, and never get the one we really
23831 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
23832 resource to request the one we want. Fixes bug 5595; bugfix on
23834 - Follow the socks5 protocol when offering username/password
23835 authentication. The fix for bug 8117 exposed this bug, and it
23836 turns out real-world applications like Pidgin do care. Bugfix on
23837 0.2.3.2-alpha; fixes bug 8879.
23838 - Prevent failures on Windows Vista and later when rebuilding the
23839 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
23840 bugfix on 0.2.4.12-alpha.
23843 - Fix an impossible buffer overrun in the AES unit tests. Fixes
23844 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
23845 - If for some reason we fail to write a microdescriptor while
23846 rebuilding the cache, do not let the annotations from that
23847 microdescriptor linger in the cache file, and do not let the
23848 microdescriptor stay recorded as present in its old location.
23849 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
23850 - Fix a memory leak that would occur whenever a configuration
23851 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
23852 - Paste the description for PathBias parameters from the man
23853 page into or.h, so the code documents them too. Fixes bug 7982;
23854 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
23855 - Relays now treat a changed IPv6 ORPort as sufficient reason to
23856 publish an updated descriptor. Fixes bug 6026; bugfix on
23858 - When launching a resolve request on behalf of an AF_UNIX control
23859 socket, omit the address field of the new entry connection, used in
23860 subsequent controller events, rather than letting tor_dup_addr()
23861 set it to "<unknown address type>". Fixes bug 8639; bugfix on
23864 o Minor bugfixes (log messages):
23865 - Fix a scaling issue in the path bias accounting code that
23866 resulted in "Bug:" log messages from either
23867 pathbias_scale_close_rates() or pathbias_count_build_success().
23868 This represents a bugfix on a previous bugfix: the original fix
23869 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
23871 - Give a less useless error message when the user asks for an IPv4
23872 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
23876 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
23877 to tolerate bug 8093 for now.
23878 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
23879 in directory authority votes to describe whether they have enough
23880 measured bandwidths to ignore advertised (relay descriptor)
23881 bandwidth claims. Resolves ticket 8711.
23882 - Update to the June 5 2013 Maxmind GeoLite Country database.
23884 o Removed documentation:
23885 - Remove some of the older contents of doc/ as obsolete; move others
23886 to torspec.git. Fixes bug 8965.
23888 o Code simplification and refactoring:
23889 - Avoid using character buffers when constructing most directory
23890 objects: this approach was unwieldy and error-prone. Instead,
23891 build smartlists of strings, and concatenate them when done.
23894 Changes in version 0.2.4.12-alpha - 2013-04-18
23895 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
23896 process for lengthening the guard rotation period, makes directory
23897 authority opinions in the consensus a bit less gameable, makes socks5
23898 username/password circuit isolation actually work, and fixes a wide
23899 variety of other issues.
23902 - Raise the default time that a client keeps an entry guard from
23903 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
23904 2012 paper. (We would make it even longer, but we need better client
23905 load balancing first.) Also, make the guard lifetime controllable
23906 via a new GuardLifetime torrc option and a GuardLifetime consensus
23907 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
23908 - Directory authorities now prefer using measured bandwidths to
23909 advertised ones when computing flags and thresholds. Resolves
23911 - Directory authorities that have more than a threshold number
23912 of relays with measured bandwidths now treat relays with unmeasured
23913 bandwidths as having bandwidth 0. Resolves ticket 8435.
23915 o Major bugfixes (assert / resource use):
23916 - Avoid a bug where our response to TLS renegotiation under certain
23917 network conditions could lead to a busy-loop, with 100% CPU
23918 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
23919 - Avoid an assertion when we discover that we'd like to write a cell
23920 onto a closing connection: just discard the cell. Fixes another
23921 case of bug 7350; bugfix on 0.2.4.4-alpha.
23923 o Major bugfixes (client-side privacy):
23924 - When we mark a circuit as unusable for new circuits, have it
23925 continue to be unusable for new circuits even if MaxCircuitDirtiness
23926 is increased too much at the wrong time, or the system clock jumps
23927 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
23928 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
23929 which have resolved to internal addresses") is set, apply that
23930 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
23931 - When an exit relay rejects a stream with reason "exit policy", but
23932 we only know an exit policy summary (e.g. from the microdesc
23933 consensus) for it, do not mark the relay as useless for all exiting.
23934 Instead, mark just the circuit as unsuitable for that particular
23935 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
23936 - Allow applications to get proper stream isolation with
23937 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
23938 username/password authentication also offer "no authentication". Tor
23939 had previously preferred "no authentication", so the applications
23940 never actually sent Tor their auth details. Now Tor selects
23941 username/password authentication if it's offered. You can disable
23942 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
23943 bug 8117; bugfix on 0.2.3.3-alpha.
23945 o Major bugfixes (other):
23946 - When unable to find any working directory nodes to use as a
23947 directory guard, give up rather than adding the same non-working
23948 nodes to the directory guard list over and over. Fixes bug 8231;
23949 bugfix on 0.2.4.8-alpha.
23952 - Reject as invalid most directory objects containing a NUL.
23953 Belt-and-suspender fix for bug 8037.
23954 - In our testsuite, create temporary directories with a bit more
23955 entropy in their name to make name collisions less likely. Fixes
23957 - Add CACHED keyword to ADDRMAP events in the control protocol
23958 to indicate whether a DNS result will be cached or not. Resolves
23960 - Update to the April 3 2013 Maxmind GeoLite Country database.
23962 o Minor features (build):
23963 - Detect and reject attempts to build Tor with threading support
23964 when OpenSSL has been compiled without threading support.
23966 - Clarify that when autoconf is checking for nacl, it is checking
23967 specifically for nacl with a fast curve25519 implementation.
23969 - Warn if building on a platform with an unsigned time_t: there
23970 are too many places where Tor currently assumes that time_t can
23971 hold negative values. We'd like to fix them all, but probably
23974 o Minor bugfixes (build):
23975 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
23976 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
23977 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
23978 - Add the old src/or/micro-revision.i filename to CLEANFILES.
23979 On the off chance that somebody has one, it will go away as soon
23980 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
23981 - Build Tor correctly on 32-bit platforms where the compiler can build
23982 but not run code using the "uint128_t" construction. Fixes bug 8587;
23983 bugfix on 0.2.4.8-alpha.
23984 - Fix compilation warning with some versions of clang that would
23985 prefer the -Wswitch-enum compiler flag to warn about switch
23986 statements with missing enum values, even if those switch
23987 statements have a "default:" statement. Fixes bug 8598; bugfix
23990 o Minor bugfixes (protocol):
23991 - Fix the handling of a TRUNCATE cell when it arrives while the
23992 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
23993 - Fix a misframing issue when reading the version numbers in a
23994 VERSIONS cell. Previously we would recognize [00 01 00 02] as
23995 'version 1, version 2, and version 0x100', when it should have
23996 only included versions 1 and 2. Fixes bug 8059; bugfix on
23997 0.2.0.10-alpha. Reported pseudonymously.
23998 - Make the format and order of STREAM events for DNS lookups
23999 consistent among the various ways to launch DNS lookups. Fixes
24000 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
24001 - Correct our check for which versions of Tor support the EXTEND2
24002 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
24003 later, when support was really added in version 0.2.4.8-alpha.
24004 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
24006 o Minor bugfixes (other):
24007 - Correctly store microdescriptors and extrainfo descriptors with
24008 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
24009 Bug reported by "cypherpunks".
24010 - Increase the width of the field used to remember a connection's
24011 link protocol version to two bytes. Harmless for now, since the
24012 only currently recognized versions are one byte long. Reported
24013 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
24014 - If the state file's path bias counts are invalid (presumably from a
24015 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
24016 additional checks and log messages to the scaling of Path Bias
24017 counts, in case there still are remaining issues with scaling.
24018 Should help resolve bug 8235.
24019 - Eliminate several instances where we use "Nickname=ID" to refer to
24020 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
24021 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
24022 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
24024 o Minor bugfixes (syscalls):
24025 - Always check the return values of functions fcntl() and
24026 setsockopt(). We don't believe these are ever actually failing in
24027 practice, but better safe than sorry. Also, checking these return
24028 values should please analysis tools like Coverity. Patch from
24029 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
24030 - Use direct writes rather than stdio when building microdescriptor
24031 caches, in an attempt to mitigate bug 8031, or at least make it
24034 o Minor bugfixes (config):
24035 - When rejecting a configuration because we were unable to parse a
24036 quoted string, log an actual error message. Fixes bug 7950; bugfix
24038 - Behave correctly when the user disables LearnCircuitBuildTimeout
24039 but doesn't tell us what they would like the timeout to be. Fixes
24040 bug 6304; bugfix on 0.2.2.14-alpha.
24041 - When autodetecting the number of CPUs, use the number of available
24042 CPUs in preference to the number of configured CPUs. Inform the
24043 user if this reduces the number of available CPUs. Fixes bug 8002;
24044 bugfix on 0.2.3.1-alpha.
24045 - Make it an error when you set EntryNodes but disable UseGuardNodes,
24046 since it will (surprisingly to some users) ignore EntryNodes. Fixes
24047 bug 8180; bugfix on 0.2.3.11-alpha.
24048 - Allow TestingTorNetworks to override the 4096-byte minimum for
24049 the Fast threshold. Otherwise they can't bootstrap until they've
24050 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
24051 - Fix some logic errors when the user manually overrides the
24052 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
24055 o Minor bugfixes (log messages to help diagnose bugs):
24056 - If we fail to free a microdescriptor because of bug 7164, log
24057 the filename and line number from which we tried to free it.
24058 - Add another diagnostic to the heartbeat message: track and log
24059 overhead that TLS is adding to the data we write. If this is
24060 high, we are sending too little data to SSL_write at a time.
24061 Diagnostic for bug 7707.
24062 - Add more detail to a log message about relaxed timeouts, to help
24064 - Warn more aggressively when flushing microdescriptors to a
24065 microdescriptor cache fails, in an attempt to mitigate bug 8031,
24066 or at least make it more diagnosable.
24067 - Improve debugging output to help track down bug 8185 ("Bug:
24068 outgoing relay cell has n_chan==NULL. Dropping.")
24069 - Log the purpose of a path-bias testing circuit correctly.
24070 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
24072 o Minor bugfixes (0.2.4.x log messages that were too noisy):
24073 - Don't attempt to relax the timeout of already opened 1-hop circuits.
24074 They might never timeout. This should eliminate some/all cases of
24075 the relaxed timeout log message.
24076 - Use circuit creation time for network liveness evaluation. This
24077 should eliminate warning log messages about liveness caused
24078 by changes in timeout evaluation. Fixes bug 6572; bugfix on
24080 - Reduce a path bias length check from notice to info. The message
24081 is triggered when creating controller circuits. Fixes bug 8196;
24082 bugfix on 0.2.4.8-alpha.
24083 - Fix a path state issue that triggered a notice during relay startup.
24084 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
24085 - Reduce occurrences of warns about circuit purpose in
24086 connection_ap_expire_building(). Fixes bug 8477; bugfix on
24089 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
24090 - If we encounter a write failure on a SOCKS connection before we
24091 finish our SOCKS handshake, don't warn that we closed the
24092 connection before we could send a SOCKS reply. Fixes bug 8427;
24093 bugfix on 0.1.0.1-rc.
24094 - Correctly recognize that [::1] is a loopback address. Fixes
24095 bug 8377; bugfix on 0.2.1.3-alpha.
24096 - Fix a directory authority warn caused when we have a large amount
24097 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
24098 - Don't log inappropriate heartbeat messages when hibernating: a
24099 hibernating node is _expected_ to drop out of the consensus,
24100 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
24101 bugfix on 0.2.3.1-alpha.
24102 - Don't complain about bootstrapping problems while hibernating.
24103 These complaints reflect a general code problem, but not one
24104 with any problematic effects (no connections are actually
24105 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
24107 o Documentation fixes:
24108 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
24109 names match. Fixes bug 7768.
24110 - Make the torify manpage no longer refer to tsocks; torify hasn't
24111 supported tsocks since 0.2.3.14-alpha.
24112 - Make the tor manpage no longer reference tsocks.
24113 - Fix the GeoIPExcludeUnknown documentation to refer to
24114 ExcludeExitNodes rather than the currently nonexistent
24115 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
24118 - The tor-tsocks.conf is no longer distributed or installed. We
24119 recommend that tsocks users use torsocks instead. Resolves
24123 Changes in version 0.2.4.11-alpha - 2013-03-11
24124 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
24125 more robust, makes hidden service authentication work again, and
24126 resolves a DPI fingerprint for Tor's SSL transport.
24128 o Major features (directory authorities):
24129 - Directory authorities now support a new consensus method (17)
24130 where they cap the published bandwidth of servers for which
24131 insufficient bandwidth measurements exist. Fixes part of bug 2286.
24132 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
24133 serve any v2 directory information. Now we can test disabling the
24134 old deprecated v2 directory format, and see whether doing so has
24135 any effect on network load. Begins to fix bug 6783.
24136 - Directory authorities now include inside each vote a statement of
24137 the performance thresholds they used when assigning flags.
24138 Implements ticket 8151.
24140 o Major bugfixes (directory authorities):
24141 - Stop marking every relay as having been down for one hour every
24142 time we restart a directory authority. These artificial downtimes
24143 were messing with our Stable and Guard flag calculations. Fixes
24144 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
24146 o Major bugfixes (hidden services):
24147 - Allow hidden service authentication to succeed again. When we
24148 refactored the hidden service introduction code back
24149 in 0.2.4.1-alpha, we didn't update the code that checks
24150 whether authentication information is present, causing all
24151 authentication checks to return "false". Fix for bug 8207; bugfix
24152 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
24154 o Minor features (relays, bridges):
24155 - Make bridge relays check once a minute for whether their IP
24156 address has changed, rather than only every 15 minutes. Resolves
24157 bugs 1913 and 1992.
24158 - Refactor resolve_my_address() so it returns the method by which we
24159 decided our public IP address (explicitly configured, resolved from
24160 explicit hostname, guessed from interfaces, learned by gethostname).
24161 Now we can provide more helpful log messages when a relay guesses
24162 its IP address incorrectly (e.g. due to unexpected lines in
24163 /etc/hosts). Resolves ticket 2267.
24164 - Teach bridge-using clients to avoid 0.2.2 bridges when making
24165 microdescriptor-related dir requests, and only fall back to normal
24166 descriptors if none of their bridges can handle microdescriptors
24167 (as opposed to the fix in ticket 4013, which caused them to fall
24168 back to normal descriptors if *any* of their bridges preferred
24169 them). Resolves ticket 4994.
24170 - Randomize the lifetime of our SSL link certificate, so censors can't
24171 use the static value for filtering Tor flows. Resolves ticket 8443;
24172 related to ticket 4014 which was included in 0.2.2.33.
24173 - Support a new version of the link protocol that allows 4-byte circuit
24174 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
24175 a possible resource exhaustion issue. Closes ticket 7351; implements
24178 o Minor features (portability):
24179 - Tweak the curve25519-donna*.c implementations to tolerate systems
24180 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
24181 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
24182 the signs of types during autoconf. This is better than our old
24183 approach, which didn't work when cross-compiling.
24184 - Detect the sign of enum values, rather than assuming that MSC is the
24185 only compiler where enum types are all signed. Fixes bug 7727;
24186 bugfix on 0.2.4.10-alpha.
24188 o Minor features (other):
24189 - Say "KBytes" rather than "KB" in the man page (for various values
24190 of K), to further reduce confusion about whether Tor counts in
24191 units of memory or fractions of units of memory. Resolves ticket 7054.
24192 - Clear the high bit on curve25519 public keys before passing them to
24193 our backend, in case we ever wind up using a backend that doesn't do
24194 so itself. If we used such a backend, and *didn't* clear the high bit,
24195 we could wind up in a situation where users with such backends would
24196 be distinguishable from users without. Fixes bug 8121; bugfix on
24198 - Update to the March 6 2013 Maxmind GeoLite Country database.
24200 o Minor bugfixes (clients):
24201 - When we receive a RELAY_END cell with the reason DONE, or with no
24202 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
24203 status as "connection refused". Previously we reported these cases
24204 as success but then immediately closed the connection. Fixes bug
24205 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
24206 - Downgrade an assertion in connection_ap_expire_beginning to an
24207 LD_BUG message. The fix for bug 8024 should prevent this message
24208 from displaying, but just in case, a warn that we can diagnose
24209 is better than more assert crashes. Fixes bug 8065; bugfix on
24211 - Lower path use bias thresholds to .80 for notice and .60 for warn.
24212 Also make the rate limiting flags for the path use bias log messages
24213 independent from the original path bias flags. Fixes bug 8161;
24214 bugfix on 0.2.4.10-alpha.
24216 o Minor bugfixes (relays):
24217 - Stop trying to resolve our hostname so often (e.g. every time we
24218 think about doing a directory fetch). Now we reuse the cached
24219 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
24220 and 2410 (bugfix on 0.1.2.2-alpha).
24221 - Stop sending a stray "(null)" in some cases for the server status
24222 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
24224 - When choosing which stream on a formerly stalled circuit to wake
24225 first, make better use of the platform's weak RNG. Previously,
24226 we had been using the % ("modulo") operator to try to generate a
24227 1/N chance of picking each stream, but this behaves badly with
24228 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
24230 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
24231 Irix's random() only return 15 bits; Solaris's random() returns more
24232 bits but its RAND_MAX says it only returns 15, and so on. Motivated
24233 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
24235 o Minor bugfixes (directory authorities):
24236 - Directory authorities now use less space when formatting identical
24237 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
24240 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
24241 - Avoid leaking memory if we fail to compute a consensus signature
24242 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
24243 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
24245 - Fix a memory leak during safe-cookie controller authentication.
24246 Bugfix on 0.2.3.13-alpha.
24247 - Avoid memory leak of IPv6 policy content if we fail to format it into
24248 a router descriptor. Bugfix on 0.2.4.7-alpha.
24250 o Minor bugfixes (other code correctness issues):
24251 - Avoid a crash if we fail to generate an extrainfo descriptor.
24252 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
24253 this is CID 718634.
24254 - When detecting the largest possible file descriptor (in order to
24255 close all file descriptors when launching a new program), actually
24256 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
24257 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
24259 - Fix a copy-and-paste error when adding a missing A1 to a routerset
24260 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
24261 Bugfix on 0.2.4.10-alpha.
24262 - Fix an impossible-to-trigger integer overflow when estimating how
24263 long our onionskin queue would take. (This overflow would require us
24264 to accept 4 million onionskins before processing 100 of them.) Fixes
24265 bug 8210; bugfix on 0.2.4.10-alpha.
24267 o Code simplification and refactoring:
24268 - Add a wrapper function for the common "log a message with a
24272 Changes in version 0.2.4.10-alpha - 2013-02-04
24273 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
24274 certain attacks that flood the network with relays; changes the queue
24275 for circuit create requests from a sized-based limit to a time-based
24276 limit; resumes building with MSVC on Windows; and fixes a wide variety
24279 o Major bugfixes (directory authority):
24280 - When computing directory thresholds, ignore any rejected-as-sybil
24281 nodes during the computation so that they can't influence Fast,
24282 Guard, etc. (We should have done this for proposal 109.) Fixes
24284 - When marking a node as a likely sybil, reset its uptime metrics
24285 to zero, so that it cannot time towards getting marked as Guard,
24286 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
24290 - When a TLS write is partially successful but incomplete, remember
24291 that the flushed part has been flushed, and notice that bytes were
24292 actually written. Reported and fixed pseudonymously. Fixes bug
24293 7708; bugfix on Tor 0.1.0.5-rc.
24294 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
24295 ID: these could be used to create unexpected streams and circuits
24296 which would count as "present" to some parts of Tor but "absent"
24297 to others, leading to zombie circuits and streams or to a bandwidth
24298 denial-of-service. Fixes bug 7889; bugfix on every released version
24299 of Tor. Reported by "oftc_must_be_destroyed".
24300 - Rename all macros in our local copy of queue.h to begin with "TOR_".
24301 This change seems the only good way to permanently prevent conflicts
24302 with queue.h on various operating systems. Fixes bug 8107; bugfix
24305 o Major features (relay):
24306 - Instead of limiting the number of queued onionskins (aka circuit
24307 create requests) to a fixed, hard-to-configure number, we limit
24308 the size of the queue based on how many we expect to be able to
24309 process in a given amount of time. We estimate the time it will
24310 take to process an onionskin based on average processing time
24311 of previous onionskins. Closes ticket 7291. You'll never have to
24312 configure MaxOnionsPending again.
24314 o Major features (portability):
24315 - Resume building correctly with MSVC and Makefile.nmake. This patch
24316 resolves numerous bugs and fixes reported by ultramage, including
24317 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
24318 - Make the ntor and curve25519 code build correctly with MSVC.
24319 Fix on 0.2.4.8-alpha.
24322 - When directory authorities are computing thresholds for flags,
24323 never let the threshold for the Fast flag fall below 4096
24324 bytes. Also, do not consider nodes with extremely low bandwidths
24325 when deciding thresholds for various directory flags. This change
24326 should raise our threshold for Fast relays, possibly in turn
24327 improving overall network performance; see ticket 1854. Resolves
24329 - The Tor client now ignores sub-domain components of a .onion
24330 address. This change makes HTTP "virtual" hosting
24331 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24332 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24333 hosted on the same hidden service. Implements proposal 204.
24334 - We compute the overhead from passing onionskins back and forth to
24335 cpuworkers, and report it when dumping statistics in response to
24336 SIGUSR1. Supports ticket 7291.
24338 o Minor features (path selection):
24339 - When deciding whether we have enough descriptors to build circuits,
24340 instead of looking at raw relay counts, look at which fraction
24341 of (bandwidth-weighted) paths we're able to build. This approach
24342 keeps clients from building circuits if their paths are likely to
24343 stand out statistically. The default fraction of paths needed is
24344 taken from the consensus directory; you can override it with the
24345 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
24346 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
24347 and we have GeoIP information, also exclude all nodes with unknown
24348 countries "??" and "A1". This behavior is controlled by the
24349 new GeoIPExcludeUnknown option: you can make such nodes always
24350 excluded with "GeoIPExcludeUnknown 1", and disable the feature
24351 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
24352 gets you the default behavior. Implements feature 7706.
24353 - Path Use Bias: Perform separate accounting for successful circuit
24354 use. Keep separate statistics on stream attempt rates versus stream
24355 success rates for each guard. Provide configurable thresholds to
24356 determine when to emit log messages or disable use of guards that
24357 fail too many stream attempts. Resolves ticket 7802.
24359 o Minor features (log messages):
24360 - When learning a fingerprint for a bridge, log its corresponding
24361 transport type. Implements ticket 7896.
24362 - Improve the log message when "Bug/attack: unexpected sendme cell
24363 from client" occurs, to help us track bug 8093.
24366 - Remove a couple of extraneous semicolons that were upsetting the
24367 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
24368 bugfix on 0.2.2.1-alpha.
24369 - Remove a source of rounding error during path bias count scaling;
24370 don't count cannibalized circuits as used for path bias until we
24371 actually try to use them; and fix a circuit_package_relay_cell()
24372 warning message about n_chan==NULL. Fixes bug 7802.
24373 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
24374 actually link against nacl when we're configured to use it. Fixes
24375 bug 7972; bugfix on 0.2.4.8-alpha.
24376 - Compile correctly with the --disable-curve25519 option. Fixes
24377 bug 8153; bugfix on 0.2.4.8-alpha.
24379 o Build improvements:
24380 - Do not report status verbosely from autogen.sh unless the -v flag
24381 is specified. Fixes issue 4664. Patch from Onizuka.
24382 - Replace all calls to snprintf() outside of src/ext with
24383 tor_snprintf(). Also remove the #define to replace snprintf with
24384 _snprintf on Windows; they have different semantics, and all of
24385 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
24386 - Try to detect if we are ever building on a platform where
24387 memset(...,0,...) does not set the value of a double to 0.0. Such
24388 platforms are permitted by the C standard, though in practice
24389 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
24390 currently support them, but it's better to detect them and fail
24391 than to perform erroneously.
24393 o Removed features:
24394 - Stop exporting estimates of v2 and v3 directory traffic shares
24395 in extrainfo documents. They were unneeded and sometimes inaccurate.
24396 Also stop exporting any v2 directory request statistics. Resolves
24398 - Drop support for detecting and warning about versions of Libevent
24399 before 1.3e. Nothing reasonable ships with them any longer;
24400 warning the user about them shouldn't be needed. Resolves ticket
24403 o Code simplifications and refactoring:
24404 - Rename "isin" functions to "contains", for grammar. Resolves
24406 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
24407 with the natural logarithm function from the system libm. Resolves
24411 Changes in version 0.2.4.9-alpha - 2013-01-15
24412 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
24413 work more robustly.
24416 - Fix backward compatibility logic when receiving an embedded ntor
24417 handshake tunneled in a CREATE cell. This clears up the "Bug:
24418 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
24422 Changes in version 0.2.4.8-alpha - 2013-01-14
24423 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
24424 risks, adds a new stronger and faster circuit handshake, and offers
24425 stronger and faster link encryption when both sides support it.
24428 - Preliminary support for directory guards (proposal 207): when
24429 possible, clients now use their entry guards for non-anonymous
24430 directory requests. This can help prevent client enumeration. Note
24431 that this behavior only works when we have a usable consensus
24432 directory, and when options about what to download are more or less
24433 standard. In the future we should re-bootstrap from our guards,
24434 rather than re-bootstrapping from the preconfigured list of
24435 directory sources that ships with Tor. Resolves ticket 6526.
24436 - Tor relays and clients now support a better CREATE/EXTEND cell
24437 format, allowing the sender to specify multiple address, identity,
24438 and handshake types. Implements Robert Ransom's proposal 200;
24439 closes ticket 7199.
24441 o Major features (new circuit handshake):
24442 - Tor now supports a new circuit extension handshake designed by Ian
24443 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
24444 circuit extension handshake, later called "TAP", was a bit slow
24445 (especially on the relay side), had a fragile security proof, and
24446 used weaker keys than we'd now prefer. The new circuit handshake
24447 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
24448 function, making it significantly more secure than the older
24449 handshake, and significantly faster. Tor can use one of two built-in
24450 pure-C curve25519-donna implementations by Adam Langley, or it
24451 can link against the "nacl" library for a tuned version if present.
24453 The built-in version is very fast for 64-bit systems when building
24454 with GCC. The built-in 32-bit version is still faster than the
24455 old TAP protocol, but using libnacl is better on most such hosts.
24457 Clients don't currently use this protocol by default, since
24458 comparatively few clients support it so far. To try it, set
24459 UseNTorHandshake to 1.
24461 Implements proposal 216; closes ticket 7202.
24463 o Major features (better link encryption):
24464 - Relays can now enable the ECDHE TLS ciphersuites when available
24465 and appropriate. These ciphersuites let us negotiate forward-secure
24466 TLS secret keys more safely and more efficiently than with our
24467 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
24468 public relays prefer the (faster) P224 group, and bridges prefer
24469 the (more common) P256 group; you can override this with the
24472 Enabling these ciphers was a little tricky, since for a long time,
24473 clients had been claiming to support them without actually doing
24474 so, in order to foil fingerprinting. But with the client-side
24475 implementation of proposal 198 in 0.2.3.17-beta, clients can now
24476 match the ciphers from recent Firefox versions *and* list the
24477 ciphers they actually mean, so relays can believe such clients
24478 when they advertise ECDHE support in their TLS ClientHello messages.
24480 This feature requires clients running 0.2.3.17-beta or later,
24481 and requires both sides to be running OpenSSL 1.0.0 or later
24482 with ECC support. OpenSSL 1.0.1, with the compile-time option
24483 "enable-ec_nistp_64_gcc_128", is highly recommended.
24485 Implements the relay side of proposal 198; closes ticket 7200.
24488 - Avoid crashing when, as a relay without IPv6-exit support, a
24489 client insists on getting an IPv6 address or nothing. Fixes bug
24490 7814; bugfix on 0.2.4.7-alpha.
24493 - Improve circuit build timeout handling for hidden services.
24494 In particular: adjust build timeouts more accurately depending
24495 upon the number of hop-RTTs that a particular circuit type
24496 undergoes. Additionally, launch intro circuits in parallel
24497 if they timeout, and take the first one to reply as valid.
24498 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
24499 separate error codes; or at least, don't break for that reason.
24500 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
24501 - Update to the January 2 2013 Maxmind GeoLite Country database.
24503 o Minor features (testing):
24504 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
24505 (P-256) Diffie-Hellman handshakes to src/or/bench.
24506 - Add benchmark functions to test onion handshake performance.
24508 o Minor features (path bias detection):
24509 - Alter the Path Bias log messages to be more descriptive in terms
24510 of reporting timeouts and other statistics.
24511 - Create three levels of Path Bias log messages, as opposed to just
24512 two. These are configurable via consensus as well as via the torrc
24513 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
24514 The default values are 0.70, 0.50, and 0.30 respectively.
24515 - Separate the log message levels from the decision to drop guards,
24516 which also is available via torrc option PathBiasDropGuards.
24517 PathBiasDropGuards still defaults to 0 (off).
24518 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
24519 in combination with PathBiasExtremeRate.
24520 - Increase the default values for PathBiasScaleThreshold and
24521 PathBiasCircThreshold from (200, 20) to (300, 150).
24522 - Add in circuit usage accounting to path bias. If we try to use a
24523 built circuit but fail for any reason, it counts as path bias.
24524 Certain classes of circuits where the adversary gets to pick your
24525 destination node are exempt from this accounting. Usage accounting
24526 can be specifically disabled via consensus parameter or torrc.
24527 - Convert all internal path bias state to double-precision floating
24528 point, to avoid roundoff error and other issues.
24529 - Only record path bias information for circuits that have completed
24530 *two* hops. Assuming end-to-end tagging is the attack vector, this
24531 makes us more resilient to ambient circuit failure without any
24532 detection capability loss.
24534 o Minor bugfixes (log messages):
24535 - Rate-limit the "No circuits are opened. Relaxed timeout for a
24536 circuit with channel state open..." message to once per hour to
24537 keep it from filling the notice logs. Mitigates bug 7799 but does
24538 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
24539 - Avoid spurious warnings when configuring multiple client ports of
24540 which only some are nonlocal. Previously, we had claimed that some
24541 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
24544 o Code simplifications and refactoring:
24545 - Get rid of a couple of harmless clang warnings, where we compared
24546 enums to ints. These warnings are newly introduced in clang 3.2.
24547 - Split the onion.c file into separate modules for the onion queue
24548 and the different handshakes it supports.
24549 - Remove the marshalling/unmarshalling code for sending requests to
24550 cpuworkers over a socket, and instead just send structs. The
24551 recipient will always be the same Tor binary as the sender, so
24552 any encoding is overkill.
24555 Changes in version 0.2.4.7-alpha - 2012-12-24
24556 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
24557 directory mirrors for more robust bootstrapping; fixes more issues where
24558 clients with changing network conditions refuse to make any circuits;
24559 adds initial support for exiting to IPv6 addresses; resumes being able
24560 to update our GeoIP database, and includes the geoip6 file this time;
24561 turns off the client-side DNS cache by default due to privacy risks;
24562 and fixes a variety of other issues.
24564 o Major features (client resilience):
24565 - Add a new "FallbackDir" torrc option to use when we can't use
24566 a directory mirror from the consensus (either because we lack a
24567 consensus, or because they're all down). Currently, all authorities
24568 are fallbacks by default, and there are no other default fallbacks,
24569 but that will change. This option will allow us to give clients a
24570 longer list of servers to try to get a consensus from when first
24571 connecting to the Tor network, and thereby reduce load on the
24572 directory authorities. Implements proposal 206, "Preconfigured
24573 directory sources for bootstrapping". We also removed the old
24574 "FallbackNetworkstatus" option, since we never got it working well
24575 enough to use it. Closes bug 572.
24576 - If we have no circuits open, use a relaxed timeout (the
24577 95-percentile cutoff) until a circuit succeeds. This heuristic
24578 should allow Tor to succeed at building circuits even when the
24579 network connection drastically changes. Should help with bug 3443.
24581 o Major features (IPv6):
24582 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
24583 connectivity, then set the IPv6Exit flag to 1. Also make sure your
24584 exit policy reads as you would like: the address * applies to all
24585 address families, whereas *4 is IPv4 address only, and *6 is IPv6
24586 addresses only. On the client side, you'll need to wait until the
24587 authorities have upgraded, wait for enough exits to support IPv6,
24588 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
24589 ticket 5547, implements proposal 117 as revised in proposal 208.
24591 We DO NOT recommend that clients with actual anonymity needs start
24592 using IPv6 over Tor yet, since not enough exits support it yet.
24594 o Major features (geoip database):
24595 - Maxmind began labelling Tor relays as being in country "A1",
24596 which breaks by-country node selection inside Tor. Now we use a
24597 script to replace "A1" ("Anonymous Proxy") entries in our geoip
24598 file with real country codes. This script fixes about 90% of "A1"
24599 entries automatically and uses manual country code assignments to
24600 fix the remaining 10%. See src/config/README.geoip for details.
24601 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
24602 Country database, as modified above.
24604 o Major bugfixes (client-side DNS):
24605 - Turn off the client-side DNS cache by default. Updating and using
24606 the DNS cache is now configurable on a per-client-port
24607 level. SOCKSPort, DNSPort, etc lines may now contain
24608 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
24609 cache these types of DNS answers when we receive them from an
24610 exit node in response to an application request on this port, and
24611 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
24612 cached DNS answers of these types, we shouldn't use them. It's
24613 potentially risky to use cached DNS answers at the client, since
24614 doing so can indicate to one exit what answers we've gotten
24615 for DNS lookups in the past. With IPv6, this becomes especially
24616 problematic. Using cached DNS answers for requests on the same
24617 circuit would present less linkability risk, since all traffic
24618 on a circuit is already linkable, but it would also provide
24619 little performance benefit: the exit node caches DNS replies
24620 too. Implements a simplified version of Proposal 205. Implements
24623 o Major bugfixes (other):
24624 - Alter circuit build timeout measurement to start at the point
24625 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
24626 initialization). This should make our timeout measurements more
24627 uniform. Previously, we were sometimes including ORconn setup time
24628 in our circuit build time measurements. Should resolve bug 3443.
24629 - Fix an assertion that could trigger in hibernate_go_dormant() when
24630 closing an or_connection_t: call channel_mark_for_close() rather
24631 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
24633 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
24634 7655; bugfix on 0.2.4.6-alpha.
24637 - Add a new torrc option "ServerTransportListenAddr" to let bridge
24638 operators select the address where their pluggable transports will
24639 listen for connections. Resolves ticket 7013.
24640 - Allow an optional $ before the node identity digest in the
24641 controller command GETINFO ns/id/<identity>, for consistency with
24642 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
24643 - Log packaged cell fullness as part of the heartbeat message.
24644 Diagnosis to try to determine the extent of bug 7743.
24646 o Minor features (IPv6):
24647 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
24648 prefer to hand out virtual IPv6 addresses, since there are more of
24649 them and we can't run out. To override this behavior and make IPv4
24650 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
24651 or DNSPort you're using for resolving. Implements ticket 7571.
24652 - AutomapHostsOnResolve responses are now randomized, to avoid
24653 annoying situations where Tor is restarted and applications
24654 connect to the wrong addresses.
24655 - Never try more than 1000 times to pick a new virtual address when
24656 AutomapHostsOnResolve is set. That's good enough so long as we
24657 aren't close to handing out our entire virtual address space;
24658 if you're getting there, it's best to switch to IPv6 virtual
24662 - The ADDRMAP command can no longer generate an ill-formed error
24663 code on a failed MAPADDRESS. It now says "internal" rather than
24664 an English sentence fragment with spaces in the middle. Bugfix on
24665 Tor 0.2.0.19-alpha.
24666 - Fix log messages and comments to avoid saying "GMT" when we mean
24667 "UTC". Fixes bug 6113.
24668 - Compile on win64 using mingw64. Fixes bug 7260; patches from
24670 - Fix a crash when debugging unit tests on Windows: deallocate a
24671 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
24672 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
24675 - The DirServer option is now DirAuthority, for consistency with
24676 current naming patterns. You can still use the old DirServer form.
24678 o Code simplification and refactoring:
24679 - Move the client-side address-map/virtual-address/DNS-cache code
24680 out of connection_edge.c into a new addressmap.c module.
24681 - Remove unused code for parsing v1 directories and "running routers"
24682 documents. Fixes bug 6887.
24685 Changes in version 0.2.3.25 - 2012-11-19
24686 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
24687 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
24688 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
24689 programmer, and friend. Unstinting in his dedication to the cause of
24690 freedom, he inspired and helped many of us as we began our work on
24691 anonymity, and inspires us still. Please honor his memory by writing
24692 software to protect people's freedoms, and by helping others to do so.
24694 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
24695 significantly reduced directory overhead (via microdescriptors),
24696 enormous crypto performance improvements for fast relays on new
24697 enough hardware, a new v3 TLS handshake protocol that can better
24698 resist fingerprinting, support for protocol obfuscation plugins (aka
24699 pluggable transports), better scalability for hidden services, IPv6
24700 support for bridges, performance improvements like allowing clients
24701 to skip the first round-trip on the circuit ("optimistic data") and
24702 refilling token buckets more often, a new "stream isolation" design
24703 to isolate different applications on different circuits, and many
24704 stability, security, and privacy fixes.
24707 - Tor tries to wipe potentially sensitive data after using it, so
24708 that if some subsequent security failure exposes Tor's memory,
24709 the damage will be limited. But we had a bug where the compiler
24710 was eliminating these wipe operations when it decided that the
24711 memory was no longer visible to a (correctly running) program,
24712 hence defeating our attempt at defense in depth. We fix that
24713 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24714 is unlikely to optimize away. Future versions of Tor may use
24715 a less ridiculously heavy approach for this. Fixes bug 7352.
24716 Reported in an article by Andrey Karpov.
24719 - Fix a harmless bug when opting against publishing a relay descriptor
24720 because DisableNetwork is set. Fixes bug 7464; bugfix on
24724 Changes in version 0.2.4.6-alpha - 2012-11-13
24725 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
24726 makes our defense-in-depth memory wiping more reliable, and begins to
24727 count IPv6 addresses in bridge statistics,
24730 - Fix an assertion failure that could occur when closing a connection
24731 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
24733 - Tor tries to wipe potentially sensitive data after using it, so
24734 that if some subsequent security failure exposes Tor's memory,
24735 the damage will be limited. But we had a bug where the compiler
24736 was eliminating these wipe operations when it decided that the
24737 memory was no longer visible to a (correctly running) program,
24738 hence defeating our attempt at defense in depth. We fix that
24739 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24740 is unlikely to optimize away. Future versions of Tor may use
24741 a less ridiculously heavy approach for this. Fixes bug 7352.
24742 Reported in an article by Andrey Karpov.
24745 - Add GeoIP database for IPv6 addresses. The new config option
24747 - Bridge statistics now count bridge clients connecting over IPv6:
24748 bridge statistics files now list "bridge-ip-versions" and
24749 extra-info documents list "geoip6-db-digest". The control protocol
24750 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
24751 implementation by "shkoo", addressing ticket 5055.
24754 - Warn when we are binding low ports when hibernation is enabled;
24755 previously we had warned when we were _advertising_ low ports with
24756 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
24757 - Fix a harmless bug when opting against publishing a relay descriptor
24758 because DisableNetwork is set. Fixes bug 7464; bugfix on
24760 - Add warning message when a managed proxy dies during configuration.
24761 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
24762 - Fix a linking error when building tor-fw-helper without miniupnp.
24763 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
24764 - Check for closing an or_connection_t without going through correct
24765 channel functions; emit a warning and then call
24766 connection_or_close_for_error() so we don't assert as in bugs 7212
24768 - Compile correctly on compilers without C99 designated initializer
24769 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
24770 - Avoid a possible assert that can occur when channel_send_destroy() is
24771 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
24772 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
24773 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
24774 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
24775 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
24777 o Code simplification and refactoring:
24778 - Start using OpenBSD's implementation of queue.h, so that we don't
24779 need to hand-roll our own pointer and list structures whenever we
24780 need them. (We can't rely on a sys/queue.h, since some operating
24781 systems don't have them, and the ones that do have them don't all
24782 present the same extensions.)
24785 Changes in version 0.2.4.5-alpha - 2012-10-25
24786 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
24787 two important security vulnerabilities that could lead to remotely
24788 triggerable relay crashes, fix a major bug that was preventing clients
24789 from choosing suitable exit nodes, and refactor some of our code.
24791 o Major bugfixes (security, also in 0.2.3.24-rc):
24792 - Fix a group of remotely triggerable assertion failures related to
24793 incorrect link protocol negotiation. Found, diagnosed, and fixed
24794 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24796 - Fix a denial of service attack by which any directory authority
24797 could crash all the others, or by which a single v2 directory
24798 authority could crash everybody downloading v2 directory
24799 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24801 o Major bugfixes (also in 0.2.3.24-rc):
24802 - When parsing exit policy summaries from microdescriptors, we had
24803 previously been ignoring the last character in each one, so that
24804 "accept 80,443,8080" would be treated by clients as indicating
24805 a node that allows access to ports 80, 443, and 808. That would
24806 lead to clients attempting connections that could never work,
24807 and ignoring exit nodes that would support their connections. Now
24808 clients parse these exit policy summaries correctly. Fixes bug 7192;
24809 bugfix on 0.2.3.1-alpha.
24811 o Minor bugfixes (also in 0.2.3.24-rc):
24812 - Clients now consider the ClientRejectInternalAddresses config option
24813 when using a microdescriptor consensus stanza to decide whether
24814 an exit relay would allow exiting to an internal address. Fixes
24815 bug 7190; bugfix on 0.2.3.1-alpha.
24818 - Only disable TLS session ticket support when running as a TLS
24819 server. Now clients will blend better with regular Firefox
24820 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
24822 o Code simplification and refactoring:
24823 - Start using OpenBSD's implementation of queue.h (originally by
24825 - Move the entry node code from circuitbuild.c to its own file.
24826 - Move the circuit build timeout tracking code from circuitbuild.c
24830 Changes in version 0.2.3.24-rc - 2012-10-25
24831 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
24832 could lead to remotely triggerable relay crashes, and fixes
24833 a major bug that was preventing clients from choosing suitable exit
24836 o Major bugfixes (security):
24837 - Fix a group of remotely triggerable assertion failures related to
24838 incorrect link protocol negotiation. Found, diagnosed, and fixed
24839 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24841 - Fix a denial of service attack by which any directory authority
24842 could crash all the others, or by which a single v2 directory
24843 authority could crash everybody downloading v2 directory
24844 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24847 - When parsing exit policy summaries from microdescriptors, we had
24848 previously been ignoring the last character in each one, so that
24849 "accept 80,443,8080" would be treated by clients as indicating
24850 a node that allows access to ports 80, 443, and 808. That would
24851 lead to clients attempting connections that could never work,
24852 and ignoring exit nodes that would support their connections. Now
24853 clients parse these exit policy summaries correctly. Fixes bug 7192;
24854 bugfix on 0.2.3.1-alpha.
24857 - Clients now consider the ClientRejectInternalAddresses config option
24858 when using a microdescriptor consensus stanza to decide whether
24859 an exit relay would allow exiting to an internal address. Fixes
24860 bug 7190; bugfix on 0.2.3.1-alpha.
24863 Changes in version 0.2.4.4-alpha - 2012-10-20
24864 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
24865 vulnerability introduced by a change in OpenSSL, fixes a remotely
24866 triggerable assert, and adds new channel_t and circuitmux_t abstractions
24867 that will make it easier to test new connection transport and cell
24868 scheduling algorithms.
24870 o New directory authorities (also in 0.2.3.23-rc):
24871 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24872 authority. Closes ticket 5749.
24874 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
24875 - Disable TLS session tickets. OpenSSL's implementation was giving
24876 our TLS session keys the lifetime of our TLS context objects, when
24877 perfect forward secrecy would want us to discard anything that
24878 could decrypt a link connection as soon as the link connection
24879 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24880 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24881 - Discard extraneous renegotiation attempts once the V3 link
24882 protocol has been initiated. Failure to do so left us open to
24883 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24884 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24886 o Internal abstraction features:
24887 - Introduce new channel_t abstraction between circuits and
24888 or_connection_t to allow for implementing alternate OR-to-OR
24889 transports. A channel_t is an abstract object which can either be a
24890 cell-bearing channel, which is responsible for authenticating and
24891 handshaking with the remote OR and transmitting cells to and from
24892 it, or a listening channel, which spawns new cell-bearing channels
24893 at the request of remote ORs. Implements part of ticket 6465.
24894 - Also new is the channel_tls_t subclass of channel_t, adapting it
24895 to the existing or_connection_t code. The V2/V3 protocol handshaking
24896 code which formerly resided in command.c has been moved below the
24897 channel_t abstraction layer and may be found in channeltls.c now.
24898 Implements the rest of ticket 6465.
24899 - Introduce new circuitmux_t storing the queue of circuits for
24900 a channel; this encapsulates and abstracts the queue logic and
24901 circuit selection policy, and allows the latter to be overridden
24902 easily by switching out a policy object. The existing EWMA behavior
24903 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
24905 o Required libraries:
24906 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
24907 strongly recommended.
24910 - Warn users who run hidden services on a Tor client with
24911 UseEntryGuards disabled that their hidden services will be
24912 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
24913 attack which motivated Tor to support entry guards in the first
24914 place). Resolves ticket 6889.
24915 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
24916 dhill. Resolves ticket 6982.
24917 - Option OutboundBindAddress can be specified multiple times and
24918 accepts IPv6 addresses. Resolves ticket 6876.
24920 o Minor bugfixes (also in 0.2.3.23-rc):
24921 - Don't serve or accept v2 hidden service descriptors over a
24922 relay's DirPort. It's never correct to do so, and disabling it
24923 might make it more annoying to exploit any bugs that turn up in the
24924 descriptor-parsing code. Fixes bug 7149.
24925 - Fix two cases in src/or/transports.c where we were calling
24926 fmt_addr() twice in a parameter list. Bug found by David
24927 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
24928 - Fix memory leaks whenever we logged any message about the "path
24929 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
24930 - When relays refuse a "create" cell because their queue of pending
24931 create cells is too big (typically because their cpu can't keep up
24932 with the arrival rate), send back reason "resource limit" rather
24933 than reason "internal", so network measurement scripts can get a
24934 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
24937 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
24938 - Free some more still-in-use memory at exit, to make hunting for
24939 memory leaks easier. Resolves bug 7029.
24940 - When a Tor client gets a "truncated" relay cell, the first byte of
24941 its payload specifies why the circuit was truncated. We were
24942 ignoring this 'reason' byte when tearing down the circuit, resulting
24943 in the controller not being told why the circuit closed. Now we
24944 pass the reason from the truncated cell to the controller. Bugfix
24945 on 0.1.2.3-alpha; fixes bug 7039.
24946 - Downgrade "Failed to hand off onionskin" messages to "debug"
24947 severity, since they're typically redundant with the "Your computer
24948 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
24949 - Make clients running with IPv6 bridges connect over IPv6 again,
24950 even without setting new config options ClientUseIPv6 and
24951 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
24952 - Use square brackets around IPv6 addresses in numerous places
24953 that needed them, including log messages, HTTPS CONNECT proxy
24954 requests, TransportProxy statefile entries, and pluggable transport
24955 extra-info lines. Fixes bug 7011; patch by David Fifield.
24957 o Code refactoring and cleanup:
24958 - Source files taken from other packages now reside in src/ext;
24959 previously they were scattered around the rest of Tor.
24960 - Avoid use of reserved identifiers in our C code. The C standard
24961 doesn't like us declaring anything that starts with an
24962 underscore, so let's knock it off before we get in trouble. Fix
24963 for bug 1031; bugfix on the first Tor commit.
24966 Changes in version 0.2.3.23-rc - 2012-10-20
24967 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
24968 vulnerability introduced by a change in OpenSSL, and fixes a variety
24969 of smaller bugs in preparation for the release.
24971 o New directory authorities:
24972 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24973 authority. Closes ticket 5749.
24975 o Major bugfixes (security/privacy):
24976 - Disable TLS session tickets. OpenSSL's implementation was giving
24977 our TLS session keys the lifetime of our TLS context objects, when
24978 perfect forward secrecy would want us to discard anything that
24979 could decrypt a link connection as soon as the link connection
24980 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24981 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24982 - Discard extraneous renegotiation attempts once the V3 link
24983 protocol has been initiated. Failure to do so left us open to
24984 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24985 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24988 - Fix a possible crash bug when checking for deactivated circuits
24989 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
24990 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
24992 o Minor bugfixes (on 0.2.3.x):
24993 - Fix two cases in src/or/transports.c where we were calling
24994 fmt_addr() twice in a parameter list. Bug found by David
24995 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
24996 - Convert an assert in the pathbias code to a log message. The assert
24997 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
24998 bugfix on 0.2.3.17-beta.
24999 - Fix memory leaks whenever we logged any message about the "path
25000 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
25002 o Minor bugfixes (on 0.2.2.x and earlier):
25003 - Don't serve or accept v2 hidden service descriptors over a relay's
25004 DirPort. It's never correct to do so, and disabling it might
25005 make it more annoying to exploit any bugs that turn up in the
25006 descriptor-parsing code. Fixes bug 7149.
25007 - When relays refuse a "create" cell because their queue of pending
25008 create cells is too big (typically because their cpu can't keep up
25009 with the arrival rate), send back reason "resource limit" rather
25010 than reason "internal", so network measurement scripts can get a
25011 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
25012 - Correct file sizes when reading binary files on Cygwin, to avoid
25013 a bug where Tor would fail to read its state file. Fixes bug 6844;
25014 bugfix on 0.1.2.7-alpha.
25015 - Avoid undefined behavior when parsing the list of supported
25016 rendezvous/introduction protocols in a hidden service descriptor.
25017 Previously, Tor would have confused (as-yet-unused) protocol version
25018 numbers greater than 32 with lower ones on many platforms. Fixes
25019 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25021 o Documentation fixes:
25022 - Clarify that hidden services are TCP only. Fixes bug 6024.
25025 Changes in version 0.2.4.3-alpha - 2012-09-22
25026 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
25027 assertion, resumes letting relays test reachability of their DirPort,
25028 and cleans up a bunch of smaller bugs.
25031 - Fix an assertion failure in tor_timegm() that could be triggered
25032 by a badly formatted directory object. Bug found by fuzzing with
25033 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25036 - Fix a possible crash bug when checking for deactivated circuits
25037 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
25038 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
25039 - Allow routers to detect that their own DirPorts are running. When
25040 we removed support for versions_supports_begindir, we also
25041 accidentally removed the mechanism we used to self-test our
25042 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
25043 bugfix on 0.2.4.2-alpha.
25045 o Security features:
25046 - Switch to a completely time-invariant approach for picking nodes
25047 weighted by bandwidth. Our old approach would run through the
25048 part of the loop after it had made its choice slightly slower
25049 than it ran through the part of the loop before it had made its
25050 choice. Addresses ticket 6538.
25051 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
25052 by tor2web clients allows hidden services to identify tor2web
25053 clients through their repeated selection of the same rendezvous
25054 and introduction point circuit endpoints (their guards). Resolves
25058 - Enable Tor to read configuration, state, and key information from
25059 a FIFO. Previously Tor would only read from files with a positive
25060 stat.st_size. Code from meejah; fixes bug 6044.
25063 - Correct file sizes when reading binary files on Cygwin, to avoid
25064 a bug where Tor would fail to read its state file. Fixes bug 6844;
25065 bugfix on 0.1.2.7-alpha.
25066 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
25067 bugfix on 0.2.0.3-alpha.
25068 - When complaining about a client port on a public address, log
25069 which address we're complaining about. Fixes bug 4020; bugfix on
25070 0.2.3.3-alpha. Patch by Tom Fitzhenry.
25071 - Convert an assert in the pathbias code to a log message. The assert
25072 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
25073 bugfix on 0.2.3.17-beta.
25074 - Our new buildsystem was overzealous about rebuilding manpages: it
25075 would rebuild them all whenever any one of them changed. Now our
25076 dependency checking should be correct. Fixes bug 6843; bugfix on
25078 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
25079 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
25080 - Correct log printout about which address family is preferred
25081 when connecting to a bridge with both an IPv4 and IPv6 OR port.
25082 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
25084 o Minor bugfixes (code cleanliness):
25085 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
25086 with large values. This situation was untriggered, but nevertheless
25087 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
25088 - Reject consensus votes with more than 64 known-flags. We aren't even
25089 close to that limit yet, and our code doesn't handle it correctly.
25090 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
25091 - Avoid undefined behavior when parsing the list of supported
25092 rendezvous/introduction protocols in a hidden service descriptor.
25093 Previously, Tor would have confused (as-yet-unused) protocol version
25094 numbers greater than 32 with lower ones on many platforms. Fixes
25095 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
25096 - Fix handling of rendezvous client authorization types over 8.
25097 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
25098 - Fix building with older versions of GCC (2.95, for one) that don't
25099 like preprocessor directives inside macro arguments. Found by
25100 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
25101 - Switch weighted node selection rule from using a list of doubles
25102 to using a list of int64_t. This change should make the process
25103 slightly easier to debug and maintain. Needed to finish ticket 6538.
25105 o Code simplification and refactoring:
25106 - Move the generic "config" code into a new file, and have "config.c"
25107 hold only torrc- and state-related code. Resolves ticket 6823.
25108 - Move the core of our "choose a weighted element at random" logic
25109 into its own function, and give it unit tests. Now the logic is
25110 testable, and a little less fragile too.
25111 - Removed the testing_since field of node_t, which hasn't been used
25112 for anything since 0.2.0.9-alpha.
25114 o Documentation fixes:
25115 - Clarify that hidden services are TCP only. Fixes bug 6024.
25116 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
25120 Changes in version 0.2.3.22-rc - 2012-09-11
25121 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
25125 - Fix an assertion failure in tor_timegm() that could be triggered
25126 by a badly formatted directory object. Bug found by fuzzing with
25127 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25130 - Avoid segfault when starting up having run with an extremely old
25131 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25135 Changes in version 0.2.2.39 - 2012-09-11
25136 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
25140 - Fix an assertion failure in tor_timegm() that could be triggered
25141 by a badly formatted directory object. Bug found by fuzzing with
25142 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
25143 - Do not crash when comparing an address with port value 0 to an
25144 address policy. This bug could have been used to cause a remote
25145 assertion failure by or against directory authorities, or to
25146 allow some applications to crash clients. Fixes bug 6690; bugfix
25150 Changes in version 0.2.4.2-alpha - 2012-09-10
25151 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
25152 raises the default rate limiting even more, and makes the bootstrapping
25153 log messages less noisy.
25156 - Automatically forward the TCP ports of pluggable transport
25157 proxies using tor-fw-helper if PortForwarding is enabled. Implements
25161 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
25162 to 1GB/1GB. The previous defaults were intended to be "basically
25163 infinite", but it turns out they're now limiting our 100mbit+
25164 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
25165 last time we raised it).
25168 - Detect when we're running with a version of OpenSSL other than the
25169 one we compiled with. This has occasionally given people hard-to-
25171 - Log fewer lines at level "notice" about our OpenSSL and Libevent
25172 versions and capabilities when everything is going right. Resolves
25173 part of ticket 6736.
25174 - Directory authorities no long accept descriptors for any version of
25175 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
25176 These versions are insecure, unsupported, or both. Implements
25180 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
25181 to start with a triple-underscore so the controller won't touch it.
25182 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
25183 - Avoid segfault when starting up having run with an extremely old
25184 version of Tor and parsing its state file. Fixes bug 6801; bugfix
25186 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
25187 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
25188 - Don't follow the NULL pointer if microdescriptor generation fails.
25189 (This does not appear to be triggerable, but it's best to be safe.)
25190 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
25191 - Fix mis-declared dependencies on src/common/crypto.c and
25192 src/or/tor_main.c that could break out-of-tree builds under some
25193 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
25194 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
25195 6778; bugfix on 0.2.4.1-alpha.
25196 - Fix a harmless (in this case) build warning for implicitly
25197 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
25199 o Removed features:
25200 - Now that all versions before 0.2.2.x are disallowed, we no longer
25201 need to work around their missing features. Thus we can remove a
25202 bunch of compatibility code.
25204 o Code refactoring:
25205 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
25206 TCP ports to forward. In the past it only accepted two ports:
25207 the ORPort and the DirPort.
25210 Changes in version 0.2.4.1-alpha - 2012-09-05
25211 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
25212 bridgedb; lets relays use IPv6 addresses and directory authorities
25213 advertise them; and switches to a cleaner build interface.
25215 This is the first alpha release in a new series, so expect there to
25216 be bugs. Users who would rather test out a more stable branch should
25217 stay with 0.2.3.x for now.
25219 o Major features (bridges):
25220 - Bridges now report the pluggable transports they support to the
25221 bridge authority, so it can pass the supported transports on to
25222 bridgedb and/or eventually do reachability testing. Implements
25225 o Major features (IPv6):
25226 - Bridge authorities now accept IPv6 bridge addresses and include
25227 them in network status documents. Implements ticket 5534.
25228 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
25229 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
25230 to happen. Implements ticket 5535.
25231 - All kind of relays, not just bridges, can now advertise an IPv6
25232 OR port. Implements ticket 6362.
25233 - Directory authorities vote on IPv6 OR ports using the new consensus
25234 method 14. Implements ticket 6363.
25236 o Major features (build):
25237 - Switch to a nonrecursive Makefile structure. Now instead of each
25238 Makefile.am invoking other Makefile.am's, there is a master
25239 Makefile.am that includes the others. This change makes our build
25240 process slightly more maintainable, and improves parallelism for
25241 building with make -j. Original patch by Stewart Smith; various
25242 fixes by Jim Meyering.
25243 - Where available, we now use automake's "silent" make rules by
25244 default, so that warnings are easier to spot. You can get the old
25245 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
25247 o Minor features (code security and spec conformance):
25248 - Clear keys and key-derived material left on the stack in
25249 rendservice.c and rendclient.c. Check return value of
25250 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
25251 These fixes should make us more forward-secure against cold-boot
25252 attacks and the like. Fixes bug 2385.
25253 - Reject EXTEND cells sent to nonexistent streams. According to the
25254 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
25255 we were only checking for stream IDs that were currently in use.
25256 Found while hunting for more instances of bug 6271. Bugfix on
25257 0.0.2pre8, which introduced incremental circuit construction.
25259 o Minor features (streamlining);
25260 - No longer include the "opt" prefix when generating routerinfos
25261 or v2 directories: it has been needless since Tor 0.1.2. Closes
25263 - Remove some now-needless code that tried to aggressively flush
25264 OR connections as data was added to them. Since 0.2.0.1-alpha, our
25265 cell queue logic has saved us from the failure mode that this code
25266 was supposed to prevent. Removing this code will limit the number
25267 of baroque control flow paths through Tor's network logic. Reported
25268 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
25270 o Minor features (controller):
25271 - Add a "GETINFO signal/names" control port command. Implements
25273 - Provide default values for all options via "GETINFO config/defaults".
25274 Implements ticket 4971.
25276 o Minor features (IPv6):
25277 - New config option "AuthDirHasIPv6Connectivity 1" that directory
25278 authorities should set if they have IPv6 connectivity and want to
25279 do reachability tests for IPv6 relays. Implements feature 5974.
25280 - A relay with an IPv6 OR port now sends that address in NETINFO
25281 cells (in addition to its other address). Implements ticket 6364.
25283 o Minor features (log messages):
25284 - Omit the first heartbeat log message, because it never has anything
25285 useful to say, and it clutters up the bootstrapping messages.
25286 Resolves ticket 6758.
25287 - Don't log about reloading the microdescriptor cache at startup. Our
25288 bootstrap warnings are supposed to tell the user when there's a
25289 problem, and our bootstrap notices say when there isn't. Resolves
25290 ticket 6759; bugfix on 0.2.2.6-alpha.
25291 - Don't log "I learned some more directory information" when we're
25292 reading cached directory information. Reserve it for when new
25293 directory information arrives in response to a fetch. Resolves
25295 - Prevent rounding error in path bias counts when scaling
25296 them down, and use the correct scale factor default. Also demote
25297 some path bias related log messages down a level and make others
25298 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
25299 - We no longer warn so much when generating manpages from their
25302 o Code simplifications and refactoring:
25303 - Enhance our internal sscanf replacement so that we can eliminate
25304 the last remaining uses of the system sscanf. (Though those uses
25305 of sscanf were safe, sscanf itself is generally error prone, so
25306 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
25308 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
25309 - Move last_reachable and testing_since from routerinfo_t to node_t.
25310 Implements ticket 5529.
25311 - Add replaycache_t structure, functions and unit tests, then refactor
25312 rend_service_introduce() to be more clear to read, improve, debug,
25313 and test. Resolves bug 6177.
25314 - Finally remove support for malloc_good_size and malloc_usable_size.
25315 We had hoped that these functions would let us eke a little more
25316 memory out of our malloc implementation. Unfortunately, the only
25317 implementations that provided these functions are also ones that
25318 are already efficient about not overallocation: they never got us
25319 more than 7 or so bytes per allocation. Removing them saves us a
25320 little code complexity and a nontrivial amount of build complexity.
25322 o New requirements:
25323 - Tor maintainers now require Automake version 1.9 or later to build
25324 Tor from the Git repository. (Automake is not required when building
25325 from a source distribution.)
25328 Changes in version 0.2.3.21-rc - 2012-09-05
25329 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25330 series. It fixes a trio of potential security bugs, fixes a bug where
25331 we were leaving some of the fast relays out of the microdescriptor
25332 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25333 and cleans up other smaller issues.
25335 o Major bugfixes (security):
25336 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25337 could use this trick to make their circuits receive cells faster
25338 than our flow control would have allowed, or to gum up the network,
25339 or possibly to do targeted memory denial-of-service attacks on
25340 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25341 from July 2002, before the release of Tor 0.0.0. We had committed
25342 this patch previously, but we had to revert it because of bug 6271.
25343 Now that 6271 is fixed, this patch appears to work.
25344 - Reject any attempt to extend to an internal address. Without
25345 this fix, a router could be used to probe addresses on an internal
25346 network to see whether they were accepting connections. Fixes bug
25347 6710; bugfix on 0.0.8pre1.
25348 - Do not crash when comparing an address with port value 0 to an
25349 address policy. This bug could have been used to cause a remote
25350 assertion failure by or against directory authorities, or to
25351 allow some applications to crash clients. Fixes bug 6690; bugfix
25355 - Remove the upper bound on microdescriptor length. We were hitting
25356 the limit for routers with complex exit policies or family
25357 declarations, causing clients to not use them. Fixes the first
25358 piece of bug 6404; fix on 0.2.2.6-alpha.
25359 - Detect "ORPort 0" as meaning, uniformly, that we're not running
25360 as a relay. Previously, some of our code would treat the presence
25361 of any ORPort line as meaning that we should act like a relay,
25362 even though our new listener code would correctly not open any
25363 ORPorts for ORPort 0. Similar bugs in other Port options are also
25364 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
25367 - Avoid a pair of double-free and use-after-mark bugs that can
25368 occur with certain timings in canceled and re-received DNS
25369 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
25370 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
25371 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
25372 - Allow one-hop directory fetching circuits the full "circuit build
25373 timeout" period, rather than just half of it, before failing them
25374 and marking the relay down. This fix should help reduce cases where
25375 clients declare relays (or worse, bridges) unreachable because
25376 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
25377 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
25379 - Authorities no longer include any router in their microdescriptor
25380 consensuses for which they couldn't generate or agree on a
25381 microdescriptor. Fixes the second piece of bug 6404; fix on
25383 - Detect and reject attempts to specify both "FooPort" and
25384 "FooPort 0" in the same configuration domain. (It's still okay
25385 to have a FooPort in your configuration file, and use "FooPort 0"
25386 on the command line to disable it.) Fixes the second half of bug
25387 6507; bugfix on 0.2.3.3-alpha.
25388 - Make wildcarded addresses (that is, ones beginning with "*.") work
25389 when provided via the controller's MapAddress command. Previously,
25390 they were accepted, but we never actually noticed that they were
25391 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
25392 - Avoid crashing on a malformed state file where EntryGuardPathBias
25393 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
25394 - Add a (probably redundant) memory clear between iterations of
25395 the router status voting loop, to prevent future coding errors
25396 where data might leak between iterations of the loop. Resolves
25399 o Minor bugfixes (log messages):
25400 - Downgrade "set buildtimeout to low value" messages to "info"
25401 severity; they were never an actual problem, there was never
25402 anything reasonable to do about them, and they tended to spam logs
25403 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
25404 - Downgrade path-bias warning messages to "info". We'll try to get
25405 them working better in 0.2.4. Add internal circuit construction
25406 state to protect against the noisy warn message "Unexpectedly high
25407 circuit_successes". Also add some additional rate-limited notice
25408 messages to help determine the root cause of the warn. Fixes bug
25409 6475. Bugfix against 0.2.3.17-beta.
25410 - Move log message when unable to find a microdesc in a routerstatus
25411 entry to parse time. Previously we'd spam this warning every time
25412 we tried to figure out which microdescriptors to download. Fixes
25413 the third piece of bug 6404; fix on 0.2.3.18-rc.
25416 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
25417 change when the authority is deciding whether to accept a newly
25418 uploaded descriptor. Implements ticket 6423.
25419 - Add missing documentation for consensus and microdesc files.
25420 Resolves ticket 6732.
25423 Changes in version 0.2.2.38 - 2012-08-12
25424 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
25425 attack that could in theory leak path information.
25428 - Avoid an uninitialized memory read when reading a vote or consensus
25429 document that has an unrecognized flavor name. This read could
25430 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25431 - Try to leak less information about what relays a client is
25432 choosing to a side-channel attacker. Previously, a Tor client would
25433 stop iterating through the list of available relays as soon as it
25434 had chosen one, thus finishing a little earlier when it picked
25435 a router earlier in the list. If an attacker can recover this
25436 timing information (nontrivial but not proven to be impossible),
25437 they could learn some coarse-grained information about which relays
25438 a client was picking (middle nodes in particular are likelier to
25439 be affected than exits). The timing attack might be mitigated by
25440 other factors (see bug 6537 for some discussion), but it's best
25441 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25444 Changes in version 0.2.3.20-rc - 2012-08-05
25445 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
25446 series. It fixes a pair of code security bugs and a potential anonymity
25447 issue, updates our RPM spec files, and cleans up other smaller issues.
25450 - Avoid read-from-freed-memory and double-free bugs that could occur
25451 when a DNS request fails while launching it. Fixes bug 6480;
25452 bugfix on 0.2.0.1-alpha.
25453 - Avoid an uninitialized memory read when reading a vote or consensus
25454 document that has an unrecognized flavor name. This read could
25455 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25456 - Try to leak less information about what relays a client is
25457 choosing to a side-channel attacker. Previously, a Tor client would
25458 stop iterating through the list of available relays as soon as it
25459 had chosen one, thus finishing a little earlier when it picked
25460 a router earlier in the list. If an attacker can recover this
25461 timing information (nontrivial but not proven to be impossible),
25462 they could learn some coarse-grained information about which relays
25463 a client was picking (middle nodes in particular are likelier to
25464 be affected than exits). The timing attack might be mitigated by
25465 other factors (see bug 6537 for some discussion), but it's best
25466 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25469 - Try to make the warning when giving an obsolete SOCKSListenAddress
25470 a little more useful.
25471 - Terminate active server managed proxies if Tor stops being a
25472 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
25473 - Provide a better error message about possible OSX Asciidoc failure
25474 reasons. Fixes bug 6436.
25475 - Warn when Tor is configured to use accounting in a way that can
25476 link a hidden service to some other hidden service or public
25477 address. Resolves ticket 6490.
25480 - Check return value of fputs() when writing authority certificate
25481 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
25482 - Ignore ServerTransportPlugin lines when Tor is not configured as
25483 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
25484 - When disabling guards for having too high a proportion of failed
25485 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
25489 - Update our default RPM spec files to work with mock and rpmbuild
25490 on RHEL/Fedora. They have an updated set of dependencies and
25491 conflicts, a fix for an ancient typo when creating the "_tor"
25492 user, and better instructions. Thanks to Ondrej Mikle for the
25493 patch series. Fixes bug 6043.
25496 - Make it possible to set the TestingTorNetwork configuration
25497 option using AlternateDirAuthority and AlternateBridgeAuthority
25498 as an alternative to setting DirServer. Addresses ticket 6377.
25501 - Clarify the documentation for the Alternate*Authority options.
25503 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
25505 o Code simplification and refactoring:
25506 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
25507 10 lines. Also, don't nest them. Doing so in the past has
25508 led to hard-to-debug code. The new style is to use the
25509 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
25512 Changes in version 0.2.3.19-rc - 2012-07-06
25513 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
25514 series. It fixes the compile on Windows, reverts to a GeoIP database
25515 that isn't as broken, and fixes a flow control bug that has been around
25516 since the beginning of Tor.
25519 - Fix a bug handling SENDME cells on nonexistent streams that could
25520 result in bizarre window values. Report and patch contributed
25521 pseudonymously. Fixes part of bug 6271. This bug was introduced
25522 before the first Tor release, in svn commit r152.
25523 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
25524 June 2012 database, Maxmind marked many Tor relays as country "A1",
25525 which will cause risky behavior for clients that set EntryNodes
25526 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
25527 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
25528 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
25531 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
25532 bugfix on 0.2.1.10-alpha.
25535 Changes in version 0.2.3.18-rc - 2012-06-28
25536 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
25537 series. It fixes a few smaller bugs, but generally appears stable.
25538 Please test it and let us know whether it is!
25541 - Allow wildcarded mapaddress targets to be specified on the
25542 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
25543 - Make our linker option detection code more robust against linkers
25544 such as on FreeBSD 8, where a bad combination of options completes
25545 successfully but makes an unrunnable binary. Fixes bug 6173;
25546 bugfix on 0.2.3.17-beta.
25548 o Minor bugfixes (on 0.2.2.x and earlier):
25549 - Avoid a false positive in the util/threads unit test by increasing
25550 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
25551 - Replace "Sending publish request" log messages with "Launching
25552 upload", so that they no longer confusingly imply that we're
25553 sending something to a directory we might not even be connected
25554 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
25555 - Make sure to set *socket_error in all error cases in
25556 connection_connect(), so it can't produce a warning about
25557 errno being zero from errno_to_orconn_end_reason(). Bugfix on
25558 0.2.1.1-alpha; resolves ticket 6028.
25559 - Downgrade "Got a certificate, but we already have it" log messages
25560 from warning to info, except when we're a dirauth. Fixes bug 5238;
25561 bugfix on 0.2.1.7-alpha.
25562 - When checking for requested signatures on the latest consensus
25563 before serving it to a client, make sure to check the right
25564 consensus flavor. Bugfix on 0.2.2.6-alpha.
25565 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
25566 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
25568 o Minor bugfixes (on 0.2.3.x):
25569 - Make format_helper_exit_status() avoid unnecessary space padding
25570 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
25572 - Downgrade a message about cleaning the microdescriptor cache to
25573 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
25574 - Log a BUG message at severity INFO if we have a networkstatus with
25575 a missing entry for some microdescriptor. Continues on a patch
25577 - Improve the log message when a managed proxy fails to launch. Fixes
25578 bug 5099; bugfix on 0.2.3.6-alpha.
25579 - Don't do DNS lookups when parsing corrupted managed proxy protocol
25580 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
25581 - When formatting wildcarded address mappings for the controller,
25582 be sure to include "*." as appropriate. Partially fixes bug 6244;
25583 bugfix on 0.2.3.9-alpha.
25584 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
25585 Bugfix on 0.2.3.13-alpha.
25586 - Stop logging messages about running with circuit timeout learning
25587 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
25588 - Disable a spurious warning about reading on a marked and flushing
25589 connection. We shouldn't be doing that, but apparently we
25590 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
25591 - Fix a bug that stopped AllowDotExit from working on addresses
25592 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
25595 o Code simplification, refactoring, unit tests:
25596 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
25597 Libevent's notion of cached time when possible.
25598 - Remove duplicate code for invoking getrlimit() from control.c.
25599 - Add a unit test for the environment_variable_names_equal function.
25602 - Document the --defaults-torrc option, and the new (in 0.2.3)
25603 semantics for overriding, extending, and clearing lists of
25604 options. Closes bug 4748.
25607 Changes in version 0.2.3.17-beta - 2012-06-15
25608 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
25609 gets our TLS handshake back on track for being able to blend in with
25610 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
25611 with Vidalia, and otherwise continues to get us closer to a release
25615 - Enable gcc and ld hardening by default. Resolves ticket 5210.
25616 - Update TLS cipher list to match Firefox 8 and later. Resolves
25618 - Implement the client side of proposal 198: remove support for
25619 clients falsely claiming to support standard ciphersuites that
25620 they can actually provide. As of modern OpenSSL versions, it's not
25621 necessary to fake any standard ciphersuite, and doing so prevents
25622 us from using better ciphersuites in the future, since servers
25623 can't know whether an advertised ciphersuite is really supported or
25624 not. Some hosts -- notably, ones with very old versions of OpenSSL
25625 or where OpenSSL has been built with ECC disabled -- will stand
25626 out because of this change; TBB users should not be affected.
25629 - Change the default value for DynamicDHGroups (introduced in
25630 0.2.3.9-alpha) to 0. This feature can make Tor relays less
25631 identifiable by their use of the mod_ssl DH group, but at
25632 the cost of some usability (#4721) and bridge tracing (#6087)
25633 regressions. Resolves ticket 5598.
25634 - Send a CRLF at the end of each STATUS_* control protocol event. This
25635 bug tickled a bug in Vidalia which would make it freeze. Fixes
25636 bug 6094; bugfix on 0.2.3.16-alpha.
25639 - Disable writing on marked-for-close connections when they are
25640 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
25641 bug 5263; bugfix on 0.0.2pre13, where we first added a special
25642 case for flushing marked connections.
25643 - Detect SSL handshake even when the initial attempt to write the
25644 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
25645 - Change the AllowDotExit rules so they should actually work.
25646 We now enforce AllowDotExit only immediately after receiving an
25647 address via SOCKS or DNSPort: other sources are free to provide
25648 .exit addresses after the resolution occurs. Fixes bug 3940;
25649 bugfix on 0.2.2.1-alpha.
25650 - Fix a (harmless) integer overflow in cell statistics reported by
25651 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
25652 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
25653 right places and never depends on the consensus parameters or
25654 computes adaptive timeouts when it is disabled. Fixes bug 5049;
25655 bugfix on 0.2.2.14-alpha.
25656 - When building Tor on Windows with -DUNICODE (not default), ensure
25657 that error messages, filenames, and DNS server names are always
25658 NUL-terminated when we convert them to a single-byte encoding.
25659 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
25660 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
25661 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
25662 - Fix an edge case where TestingTorNetwork is set but the authorities
25663 and relays all have an uptime of zero, where the private Tor network
25664 could briefly lack support for hidden services. Fixes bug 3886;
25665 bugfix on 0.2.2.18-alpha.
25666 - Correct the manpage's descriptions for the default values of
25667 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
25669 - Fix the documentation for the --hush and --quiet command line
25670 options, which changed their behavior back in 0.2.3.3-alpha.
25671 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
25675 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
25676 more information to it, so that we can track it down in case it
25677 returns again. Mitigates bug 5235.
25678 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
25679 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
25680 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
25681 - Warn the user when HTTPProxy, but no other proxy type, is
25682 configured. This can cause surprising behavior: it doesn't send
25683 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
25684 directory traffic only. Resolves ticket 4663.
25685 - Issue a notice if a guard completes less than 40% of your circuits.
25686 Threshold is configurable by torrc option PathBiasNoticeRate and
25687 consensus parameter pb_noticepct. There is additional, off-by-
25688 default code to disable guards which fail too many circuits.
25689 Addresses ticket 5458.
25690 - Update to the June 6 2012 Maxmind GeoLite Country database.
25692 o Code simplifications and refactoring:
25693 - Remove validate_pluggable_transports_config(): its warning
25694 message is now handled by connection_or_connect().
25697 Changes in version 0.2.2.37 - 2012-06-06
25698 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
25699 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25703 - Work around a bug in OpenSSL that broke renegotiation with TLS
25704 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25705 the v2 Tor connection protocol when both sides were using OpenSSL
25706 1.0.1 would fail. Resolves ticket 6033.
25707 - When waiting for a client to renegotiate, don't allow it to add
25708 any bytes to the input buffer. This fixes a potential DoS issue.
25709 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25710 - Fix an edge case where if we fetch or publish a hidden service
25711 descriptor, we might build a 4-hop circuit and then use that circuit
25712 for exiting afterwards -- even if the new last hop doesn't obey our
25713 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25716 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25717 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25720 - Tell GCC and Clang to check for any errors in format strings passed
25721 to the tor_v*(print|scan)f functions.
25724 Changes in version 0.2.3.16-alpha - 2012-06-05
25725 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
25726 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25727 currently). It also fixes a variety of smaller bugs and other cleanups
25728 that get us closer to a release candidate.
25730 o Major bugfixes (general):
25731 - Work around a bug in OpenSSL that broke renegotiation with TLS
25732 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25733 the v2 Tor connection protocol when both sides were using OpenSSL
25734 1.0.1 would fail. Resolves ticket 6033.
25735 - When waiting for a client to renegotiate, don't allow it to add
25736 any bytes to the input buffer. This fixes a potential DoS issue.
25737 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25738 - Pass correct OR address to managed proxies (like obfsproxy),
25739 even when ORListenAddress is used. Fixes bug 4865; bugfix on
25741 - The advertised platform of a router now includes only its operating
25742 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
25743 service pack level (for Windows) or its CPU architecture (for Unix).
25744 We also no longer include the "git-XYZ" tag in the version. Resolves
25747 o Major bugfixes (clients):
25748 - If we are unable to find any exit that supports our predicted ports,
25749 stop calling them predicted, so that we don't loop and build
25750 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
25751 which introduced predicted ports.
25752 - Fix an edge case where if we fetch or publish a hidden service
25753 descriptor, we might build a 4-hop circuit and then use that circuit
25754 for exiting afterwards -- even if the new last hop doesn't obey our
25755 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25756 - Check at each new consensus whether our entry guards were picked
25757 long enough ago that we should rotate them. Previously, we only
25758 did this check at startup, which could lead to us holding a guard
25759 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
25760 - When fetching a bridge descriptor from a bridge authority,
25761 always do so anonymously, whether we have been able to open
25762 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
25763 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
25764 but we'll need to wait for bug 6010 before it's actually usable.
25766 o Major bugfixes (directory authorities):
25767 - When computing weight parameters, behave more robustly in the
25768 presence of a bad bwweightscale value. Previously, the authorities
25769 would crash if they agreed on a sufficiently broken weight_scale
25770 value: now, they use a reasonable default and carry on. Partial
25771 fix for 5786; bugfix on 0.2.2.17-alpha.
25772 - Check more thoroughly to prevent a rogue authority from
25773 double-voting on any consensus directory parameter. Previously,
25774 authorities would crash in this case if the total number of
25775 votes for any parameter exceeded the number of active voters,
25776 but would let it pass otherwise. Partial fix for bug 5786; bugfix
25780 - Rate-limit log messages when asked to connect anonymously to
25781 a private address. When these hit, they tended to hit fast and
25782 often. Also, don't bother trying to connect to addresses that we
25783 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
25784 reply makes us think we have been lied to, even when the address the
25785 client tried to connect to was "localhost." Resolves ticket 2822.
25786 - Allow packagers to insert an extra string in server descriptor
25787 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
25788 Resolves the rest of ticket 2988.
25789 - Raise the threshold of server descriptors needed (75%) and exit
25790 server descriptors needed (50%) before we will declare ourselves
25791 bootstrapped. This will make clients start building circuits a
25792 little later, but makes the initially constructed circuits less
25793 skewed and less in conflict with further directory fetches. Fixes
25795 - Close any connection that sends unrecognized junk before the
25796 handshake. Solves an issue noted in bug 4369.
25797 - Improve log messages about managed transports. Resolves ticket 5070.
25798 - Tag a bridge's descriptor as "never to be sent unencrypted".
25799 This shouldn't matter, since bridges don't open non-anonymous
25800 connections to the bridge authority and don't allow unencrypted
25801 directory connections from clients, but we might as well make
25802 sure. Closes bug 5139.
25803 - Expose our view of whether we have gone dormant to the controller,
25804 via a new "GETINFO dormant" value. Torbutton and other controllers
25805 can use this to avoid doing periodic requests through Tor while
25806 it's dormant (bug 4718). Fixes bug 5954.
25807 - Tell GCC and Clang to check for any errors in format strings passed
25808 to the tor_v*(print|scan)f functions.
25809 - Update to the May 1 2012 Maxmind GeoLite Country database.
25811 o Minor bugfixes (already included in 0.2.2.36):
25812 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
25813 Fixes bug 5346; bugfix on 0.0.8pre3.
25814 - Correct parsing of certain date types in parse_http_time().
25815 Without this patch, If-Modified-Since would behave
25816 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
25817 Esteban Manchado Velázques.
25818 - Make our number-parsing functions always treat too-large values
25819 as an error, even when those values exceed the width of the
25820 underlying type. Previously, if the caller provided these
25821 functions with minima or maxima set to the extreme values of the
25822 underlying integer type, these functions would return those
25823 values on overflow rather than treating overflow as an error.
25824 Fixes part of bug 5786; bugfix on 0.0.9.
25825 - If we hit the error case where routerlist_insert() replaces an
25826 existing (old) server descriptor, make sure to remove that
25827 server descriptor from the old_routers list. Fix related to bug
25828 1776. Bugfix on 0.2.2.18-alpha.
25829 - Clarify the behavior of MaxCircuitDirtiness with hidden service
25830 circuits. Fixes issue 5259.
25832 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
25833 - Prevent a null-pointer dereference when receiving a data cell
25834 for a nonexistent stream when the circuit in question has an
25835 empty deliver window. We don't believe this is triggerable,
25836 since we don't currently allow deliver windows to become empty,
25837 but the logic is tricky enough that it's better to make the code
25838 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
25839 - Fix a memory leak when trying to launch a DNS request when the
25840 network is disabled or the nameservers are unconfigurable. Fixes
25841 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
25842 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
25843 - Don't hold a Windows file handle open for every file mapping;
25844 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
25846 - Avoid O(n^2) performance characteristics when parsing a large
25847 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
25848 - Format more doubles with %f, not %lf. Patch from grarpamp to make
25849 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
25851 - Make our replacement implementation of strtok_r() compatible with
25852 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
25853 bugfix on 0.2.2.1-alpha.
25854 - Fix a NULL-pointer dereference on a badly formed
25855 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
25856 bugfix on 0.2.2.9-alpha.
25857 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25858 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25859 - Defensively refactor rend_mid_rendezvous() so that protocol
25860 violations and length checks happen in the beginning. Fixes
25862 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
25863 that IPv6 stuff will compile on MSVC, and compilation issues
25864 will be easier to track down. Fixes bug 5861.
25866 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
25867 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
25868 resource exhaustion, so that clients can adjust their load to
25869 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
25870 started using END_STREAM_REASON_RESOURCELIMIT.
25871 - Don't check for whether the address we're using for outbound
25872 connections has changed until after the outbound connection has
25873 completed. On Windows, getsockname() doesn't succeed until the
25874 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
25875 - If the configuration tries to set MyFamily on a bridge, refuse to
25876 do so, and warn about the security implications. Fixes bug 4657;
25877 bugfix on 0.2.0.3-alpha.
25878 - If the client fails to set a reasonable set of ciphersuites
25879 during its v2 handshake renegotiation, allow the renegotiation to
25880 continue nevertheless (i.e. send all the required certificates).
25881 Fixes bug 4591; bugfix on 0.2.0.20-rc.
25882 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
25883 option is set to 0 (which Vidalia version 0.2.16 now does when
25884 a SAVECONF attempt fails), perform other actions that SIGHUP
25885 usually causes (like reopening the logs). Fixes bug 5095; bugfix
25887 - If we fail to write a microdescriptor to the disk cache, do not
25888 continue replacing the old microdescriptor file. Fixes bug 2954;
25889 bugfix on 0.2.2.6-alpha.
25890 - Exit nodes don't need to fetch certificates for authorities that
25891 they don't recognize; only directory authorities, bridges,
25892 and caches need to do that. Fixes part of bug 2297; bugfix on
25894 - Correctly handle checking the permissions on the parent
25895 directory of a control socket in the root directory. Bug found
25896 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
25898 - When told to add a bridge with the same digest as a preexisting
25899 bridge but a different addr:port, change the addr:port as
25900 requested. Previously we would not notice the change. Fixes half
25901 of bug 5603; fix on 0.2.2.26-beta.
25902 - End AUTHCHALLENGE error messages (in the control protocol) with
25903 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
25905 o Minor bugfixes (on 0.2.3.x):
25906 - Turn an assertion (that the number of handshakes received as a
25907 server is not < 1) into a warning. Fixes bug 4873; bugfix on
25909 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
25910 we had reversed them when the answer was cached.) Fixes bug
25911 5723; bugfix on 0.2.3.1-alpha.
25912 - Work correctly on Linux systems with accept4 support advertised in
25913 their headers, but without accept4 support in the kernel. Fix
25914 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
25915 - When told to add a bridge with the same addr:port as a preexisting
25916 bridge but a different transport, change the transport as
25917 requested. Previously we would not notice the change. Fixes half
25918 of bug 5603; fix on 0.2.3.2-alpha.
25919 - Avoid a "double-reply" warning when replying to a SOCKS request
25920 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
25921 bugfix on 0.2.3.4-alpha.
25922 - Fix a bug where a bridge authority crashes if it has seen no
25923 directory requests when it's time to write statistics to disk.
25924 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
25926 - Don't try to open non-control listeners when DisableNetwork is set.
25927 Previously, we'd open all listeners, then immediately close them.
25928 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
25929 - Don't abort the managed proxy protocol if the managed proxy
25930 sends us an unrecognized line; ignore it instead. Fixes bug
25931 5910; bugfix on 0.2.3.9-alpha.
25932 - Fix a compile warning in crypto.c when compiling with clang 3.1.
25933 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
25934 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
25935 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
25936 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
25937 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
25938 - Resolve numerous small warnings and build issues with MSVC. Resolves
25941 o Documentation fixes:
25942 - Improve the manual's documentation for the NT Service command-line
25943 options. Addresses ticket 3964.
25944 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
25945 - Document the changes to the ORPort and DirPort options, and the
25946 fact that {OR/Dir}ListenAddress is now unnecessary (and
25947 therefore deprecated). Resolves ticket 5597.
25950 - Remove the torrc.bridge file: we don't use it for anything, and
25951 it had become badly desynchronized from torrc.sample. Resolves
25955 Changes in version 0.2.2.36 - 2012-05-24
25956 Tor 0.2.2.36 updates the addresses for two of the eight directory
25957 authorities, fixes some potential anonymity and security issues,
25958 and fixes several crash bugs.
25960 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
25961 known flaws, and nobody should be using them. You should upgrade. If
25962 you're using a Linux or BSD and its packages are obsolete, stop using
25963 those packages and upgrade anyway.
25965 o Directory authority changes:
25966 - Change IP address for maatuska (v3 directory authority).
25967 - Change IP address for ides (v3 directory authority), and rename
25971 - When building or running with any version of OpenSSL earlier
25972 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25973 versions have a bug (CVE-2011-4576) in which their block cipher
25974 padding includes uninitialized data, potentially leaking sensitive
25975 information to any peer with whom they make a SSLv3 connection. Tor
25976 does not use SSL v3 by default, but a hostile client or server
25977 could force an SSLv3 connection in order to gain information that
25978 they shouldn't have been able to get. The best solution here is to
25979 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25980 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25981 to make sure that the bug can't happen.
25982 - Never use a bridge or a controller-supplied node as an exit, even
25983 if its exit policy allows it. Found by wanoskarnet. Fixes bug
25984 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
25985 and 0.2.0.3-alpha (for bridge-purpose descriptors).
25986 - Only build circuits if we have a sufficient threshold of the total
25987 descriptors that are marked in the consensus with the "Exit"
25988 flag. This mitigates an attack proposed by wanoskarnet, in which
25989 all of a client's bridges collude to restrict the exit nodes that
25990 the client knows about. Fixes bug 5343.
25991 - Provide controllers with a safer way to implement the cookie
25992 authentication mechanism. With the old method, if another locally
25993 running program could convince a controller that it was the Tor
25994 process, then that program could trick the controller into telling
25995 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
25996 authentication method uses a challenge-response approach to prevent
25997 this attack. Fixes bug 5185; implements proposal 193.
26000 - Avoid logging uninitialized data when unable to decode a hidden
26001 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26002 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26003 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26005 - Fix builds when the path to sed, openssl, or sha1sum contains
26006 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26008 - Correct our replacements for the timeradd() and timersub() functions
26009 on platforms that lack them (for example, Windows). The timersub()
26010 function is used when expiring circuits, while timeradd() is
26011 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26012 bugfix on 0.2.2.24-alpha.
26013 - Fix the SOCKET_OK test that we use to tell when socket
26014 creation fails so that it works on Win64. Fixes part of bug 4533;
26015 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26018 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
26019 Fixes bug 5346; bugfix on 0.0.8pre3.
26020 - Make our number-parsing functions always treat too-large values
26021 as an error, even when those values exceed the width of the
26022 underlying type. Previously, if the caller provided these
26023 functions with minima or maxima set to the extreme values of the
26024 underlying integer type, these functions would return those
26025 values on overflow rather than treating overflow as an error.
26026 Fixes part of bug 5786; bugfix on 0.0.9.
26027 - Older Linux kernels erroneously respond to strange nmap behavior
26028 by having accept() return successfully with a zero-length
26029 socket. When this happens, just close the connection. Previously,
26030 we would try harder to learn the remote address: but there was
26031 no such remote address to learn, and our method for trying to
26032 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26033 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26034 - Correct parsing of certain date types in parse_http_time().
26035 Without this patch, If-Modified-Since would behave
26036 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
26037 Esteban Manchado Velázques.
26038 - Change the BridgePassword feature (part of the "bridge community"
26039 design, which is not yet implemented) to use a time-independent
26040 comparison. The old behavior might have allowed an adversary
26041 to use timing to guess the BridgePassword value. Fixes bug 5543;
26042 bugfix on 0.2.0.14-alpha.
26043 - Detect and reject certain misformed escape sequences in
26044 configuration values. Previously, these values would cause us
26045 to crash if received in a torrc file or over an authenticated
26046 control port. Bug found by Esteban Manchado Velázquez, and
26047 independently by Robert Connolly from Matta Consulting who further
26048 noted that it allows a post-authentication heap overflow. Patch
26049 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26050 bugfix on 0.2.0.16-alpha.
26051 - Fix a compile warning when using the --enable-openbsd-malloc
26052 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26053 - During configure, detect when we're building with clang version
26054 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26055 CFLAGS. clang doesn't support them yet.
26056 - When sending an HTTP/1.1 proxy request, include a Host header.
26057 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26058 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
26059 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
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.
26065 o Minor bugfixes (documentation and log messages):
26066 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26067 Fixes bug 4856; bugfix on Tor 0.0.6.
26068 - Update "ClientOnly" man page entry to explain that there isn't
26069 really any point to messing with it. Resolves ticket 5005.
26070 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26071 directory authority option (introduced in Tor 0.2.2.34).
26072 - Downgrade the "We're missing a certificate" message from notice
26073 to info: people kept mistaking it for a real problem, whereas it
26074 is seldom the problem even when we are failing to bootstrap. Fixes
26075 bug 5067; bugfix on 0.2.0.10-alpha.
26076 - Correctly spell "connect" in a log message on failure to create a
26077 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
26078 - Clarify the behavior of MaxCircuitDirtiness with hidden service
26079 circuits. Fixes issue 5259.
26082 - Directory authorities now reject versions of Tor older than
26083 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26084 inclusive. These versions accounted for only a small fraction of
26085 the Tor network, and have numerous known security issues. Resolves
26087 - Update to the May 1 2012 Maxmind GeoLite Country database.
26090 - When sending or relaying a RELAY_EARLY cell, we used to convert
26091 it to a RELAY cell if the connection was using the v1 link
26092 protocol. This was a workaround for older versions of Tor, which
26093 didn't handle RELAY_EARLY cells properly. Now that all supported
26094 versions can handle RELAY_EARLY cells, and now that we're enforcing
26095 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26096 remove this workaround. Addresses bug 4786.
26099 Changes in version 0.2.3.15-alpha - 2012-04-30
26100 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
26101 the development branch build on Windows again.
26103 o Minor bugfixes (on 0.2.2.x and earlier):
26104 - Make sure that there are no unhandled pending TLS errors before
26105 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
26106 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
26107 Bugfix on 0.1.0.5-rc; fixes bug 4528.
26108 - Fix an assert that directory authorities could trigger on sighup
26109 during some configuration state transitions. We now don't treat
26110 it as a fatal error when the new descriptor we just generated in
26111 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
26112 - After we pick a directory mirror, we would refuse to use it if
26113 it's in our ExcludeExitNodes list, resulting in mysterious failures
26114 to bootstrap for people who just wanted to avoid exiting from
26115 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
26116 - When building with --enable-static-tor on OpenBSD, do not
26117 erroneously attempt to link -lrt. Fixes bug 5103.
26119 o Minor bugfixes (on 0.2.3.x):
26120 - When Tor is built with kernel headers from a recent (last few
26121 years) Linux kernel, do not fail to run on older (pre-2.6.28
26122 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
26123 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
26124 and 0.2.3.12-alpha.
26125 - Fix compilation with miniupnpc version 1.6; patch from
26126 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
26127 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
26128 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
26129 - Fix compilation on platforms without unistd.h, or where environ
26130 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
26133 - Directory authorities are now a little more lenient at accepting
26134 older router descriptors, or newer router descriptors that don't
26135 make big changes. This should help ameliorate past and future
26136 issues where routers think they have uploaded valid descriptors,
26137 but the authorities don't think so. Fix for ticket 2479.
26138 - Make the code that clients use to detect an address change be
26139 IPv6-aware, so that it won't fill clients' logs with error
26140 messages when trying to get the IPv4 address of an IPv6
26141 connection. Implements ticket 5537.
26143 o Removed features:
26144 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
26145 authorities needed to use it for a while to keep the network working
26146 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
26147 that was six months ago. As of now, it should no longer be needed
26151 Changes in version 0.2.3.14-alpha - 2012-04-23
26152 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
26153 candidate. It also dramatically speeds up AES: fast relays should
26154 consider switching to the newer OpenSSL library.
26156 o Directory authority changes:
26157 - Change IP address for ides (v3 directory authority), and rename
26161 - Avoid logging uninitialized data when unable to decode a hidden
26162 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
26163 - Avoid a client-side assertion failure when receiving an INTRODUCE2
26164 cell on a general purpose circuit. Fixes bug 5644; bugfix on
26166 - If authorities are unable to get a v2 consensus document from other
26167 directory authorities, they no longer fall back to fetching
26168 them from regular directory caches. Fixes bug 5635; bugfix on
26169 0.2.2.26-beta, where routers stopped downloading v2 consensus
26170 documents entirely.
26171 - When we start a Tor client with a normal consensus already cached,
26172 be willing to download a microdescriptor consensus. Fixes bug 4011;
26173 fix on 0.2.3.1-alpha.
26175 o Major features (performance):
26176 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
26177 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
26178 vectorized AES implementations as appropriate. These can be much,
26179 much faster than other AES implementations.
26181 o Minor bugfixes (0.2.2.x and earlier):
26182 - Don't launch more than 10 service-side introduction-point circuits
26183 for a hidden service in five minutes. Previously, we would consider
26184 launching more introduction-point circuits if at least one second
26185 had passed without any introduction-point circuits failing. Fixes
26186 bug 4607; bugfix on 0.0.7pre1.
26187 - Change the BridgePassword feature (part of the "bridge community"
26188 design, which is not yet implemented) to use a time-independent
26189 comparison. The old behavior might have allowed an adversary
26190 to use timing to guess the BridgePassword value. Fixes bug 5543;
26191 bugfix on 0.2.0.14-alpha.
26192 - Enforce correct return behavior of tor_vsscanf() when the '%%'
26193 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
26194 - When sending an HTTP/1.1 proxy request, include a Host header.
26195 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
26196 - Don't log that we have "decided to publish new relay descriptor"
26197 unless we are actually publishing a descriptor. Fixes bug 3942;
26198 bugfix on 0.2.2.28-beta.
26200 o Minor bugfixes (0.2.3.x):
26201 - Fix a bug where a bridge authority crashes (on a failed assert)
26202 if it has seen no directory requests when it's time to write
26203 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
26204 - Fix bug stomping on ORPort option NoListen and ignoring option
26205 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
26206 - In the testsuite, provide a large enough buffer in the tor_sscanf
26207 unit test. Otherwise we'd overrun that buffer and crash during
26208 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
26210 - Make sure we create the keys directory if it doesn't exist and we're
26211 about to store the dynamic Diffie-Hellman parameters. Fixes bug
26212 5572; bugfix on 0.2.3.13-alpha.
26213 - Fix a small memory leak when trying to decode incorrect base16
26214 authenticator during SAFECOOKIE authentication. Found by
26215 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
26218 - Add more information to a log statement that might help track down
26219 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
26220 non-IP address" messages (or any Bug messages, for that matter!),
26221 please let us know about it.
26222 - Relays now understand an IPv6 address when they get one from a
26223 directory server. Resolves ticket 4875.
26224 - Resolve IPv6 addresses in bridge and entry statistics to country
26225 code "??" which means we at least count them. Resolves ticket 5053;
26226 improves on 0.2.3.9-alpha.
26227 - Update to the April 3 2012 Maxmind GeoLite Country database.
26228 - Begin a doc/state-contents.txt file to explain the contents of
26229 the Tor state file. Fixes bug 2987.
26231 o Default torrc changes:
26232 - Stop listing "socksport 9050" in torrc.sample. We open a socks
26233 port on 9050 by default anyway, so this should not change anything
26235 - Stop mentioning the deprecated *ListenAddress options in
26236 torrc.sample. Fixes bug 5438.
26237 - Document unit of bandwidth related options in sample torrc.
26240 o Removed features:
26241 - The "torify" script no longer supports the "tsocks" socksifier
26242 tool, since tsocks doesn't support DNS and UDP right for Tor.
26243 Everyone should be using torsocks instead. Fixes bugs 3530 and
26244 5180. Based on a patch by "ugh".
26246 o Code refactoring:
26247 - Change the symmetric cipher interface so that creating and
26248 initializing a stream cipher are no longer separate functions.
26249 - Remove all internal support for unpadded RSA. We never used it, and
26250 it would be a bad idea to start.
26253 Changes in version 0.2.3.13-alpha - 2012-03-26
26254 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
26255 in managed pluggable transports, as well as providing other cleanups
26256 that get us closer to a release candidate.
26258 o Directory authority changes:
26259 - Change IP address for maatuska (v3 directory authority).
26262 - Provide controllers with a safer way to implement the cookie
26263 authentication mechanism. With the old method, if another locally
26264 running program could convince a controller that it was the Tor
26265 process, then that program could trick the controller into telling
26266 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
26267 authentication method uses a challenge-response approach to prevent
26268 this attack. Fixes bug 5185, implements proposal 193.
26269 - Never use a bridge or a controller-supplied node as an exit, even
26270 if its exit policy allows it. Found by wanoskarnet. Fixes bug
26271 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
26272 and 0.2.0.3-alpha (for bridge-purpose descriptors).
26273 - Only build circuits if we have a sufficient threshold of the total
26274 descriptors that are marked in the consensus with the "Exit"
26275 flag. This mitigates an attack proposed by wanoskarnet, in which
26276 all of a client's bridges collude to restrict the exit nodes that
26277 the client knows about. Fixes bug 5343.
26279 o Major bugfixes (on Tor 0.2.3.x):
26280 - Avoid an assert when managed proxies like obfsproxy are configured,
26281 and we receive HUP signals or setconf attempts too rapidly. This
26282 situation happens most commonly when Vidalia tries to attach to
26283 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
26284 bugfix on 0.2.3.6-alpha.
26285 - Fix a relay-side pluggable transports bug where managed proxies were
26286 unreachable from the Internet, because Tor asked them to bind on
26287 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
26288 - Stop discarding command-line arguments when TestingTorNetwork
26289 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
26290 0.2.3.9-alpha, where task 4552 added support for two layers of
26292 - Resume allowing the unit tests to run in gdb. This was accidentally
26293 made impossible when the DisableDebuggerAttachment option was
26294 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
26295 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
26296 0.2.3.11-alpha. Reported by Anthony G. Basile.
26298 o Minor bugfixes (on 0.2.2.x and earlier):
26299 - Ensure we don't cannibalize circuits that are longer than three hops
26300 already, so we don't end up making circuits with 5 or more
26301 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
26302 0.1.0.1-rc which introduced cannibalization.
26303 - Detect and reject certain misformed escape sequences in
26304 configuration values. Previously, these values would cause us
26305 to crash if received in a torrc file or over an authenticated
26306 control port. Bug found by Esteban Manchado Velázquez, and
26307 independently by Robert Connolly from Matta Consulting who further
26308 noted that it allows a post-authentication heap overflow. Patch
26309 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
26310 bugfix on 0.2.0.16-alpha.
26311 - Fix a compile warning when using the --enable-openbsd-malloc
26312 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
26313 - Directory caches no longer refuse to clean out descriptors because
26314 of missing v2 networkstatus documents, unless they're configured
26315 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
26316 0.2.2.26-beta. Patch by Daniel Bryg.
26317 - Update to the latest version of the tinytest unit testing framework.
26318 This includes a couple of bugfixes that can be relevant for
26319 running forked unit tests on Windows, and removes all reserved
26322 o Minor bugfixes (on 0.2.3.x):
26323 - On a failed pipe() call, don't leak file descriptors. Fixes bug
26324 4296; bugfix on 0.2.3.1-alpha.
26325 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
26326 until after we have received a CERTS cell. Fixes bug 4361; bugfix
26327 on 0.2.3.6-alpha. Patch by "frosty".
26328 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26329 option, so that the IP stack doesn't decide to use it for IPv4
26330 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26331 - Ensure that variables set in Tor's environment cannot override
26332 environment variables that Tor passes to a managed
26333 pluggable-transport proxy. Previously, Tor would pass every
26334 variable in its environment to managed proxies along with the new
26335 ones, in such a way that on many operating systems, the inherited
26336 environment variables would override those which Tor tried to
26337 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26338 bugfix on 0.2.3.9-alpha for Windows.
26341 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26342 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26343 - Update to the March 6 2012 Maxmind GeoLite Country database.
26346 Changes in version 0.2.3.12-alpha - 2012-02-13
26347 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
26348 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
26349 when Tor is configured to use a pluggable transport like obfsproxy.
26352 - Fix builds when the path to sed, openssl, or sha1sum contains
26353 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26355 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
26356 connections. This change should allow busy exit relays to stop
26357 running out of available sockets as quickly. Fixes bug 4950;
26358 bugfix on 0.2.2.26-beta.
26359 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
26360 would ask the bridge for microdescriptors, which are only supported
26361 in 0.2.3.x, and then fail to bootstrap when it didn't get the
26362 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
26363 - Properly set up obfsproxy's environment when in managed mode. The
26364 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
26365 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
26366 5076 and 5082; bugfix on 0.2.3.6-alpha.
26369 - Use the dead_strip option when building Tor on OS X. This reduces
26370 binary size by almost 19% when linking openssl and libevent
26371 statically, which we do for Tor Browser Bundle.
26372 - Fix broken URLs in the sample torrc file, and tell readers about
26373 the OutboundBindAddress, ExitPolicyRejectPrivate, and
26374 PublishServerDescriptor options. Addresses bug 4652.
26375 - Update to the February 7 2012 Maxmind GeoLite Country database.
26378 - Downgrade the "We're missing a certificate" message from notice
26379 to info: people kept mistaking it for a real problem, whereas it
26380 is seldom the problem even when we are failing to bootstrap. Fixes
26381 bug 5067; bugfix on 0.2.0.10-alpha.
26382 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
26383 managed pluggable transport server proxy's environment.
26384 Previously, we would put it there, even though Tor doesn't
26385 implement an 'extended server port' yet, and even though Tor
26386 almost certainly isn't listening at that address. For now, we set
26387 it to an empty string to avoid crashing older obfsproxies. Bugfix
26389 - Log the heartbeat message every HeartbeatPeriod seconds, not every
26390 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
26391 0.2.3.1-alpha. Bug reported by Scott Bennett.
26392 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
26393 bugfix on 0.2.3.11-alpha.
26394 - Update "ClientOnly" man page entry to explain that there isn't
26395 really any point to messing with it. Resolves ticket 5005.
26396 - Use the correct CVE number for CVE-2011-4576 in our comments and
26397 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
26400 o Code simplifications and refactoring:
26401 - Use the _WIN32 macro throughout our code to detect Windows.
26402 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
26406 Changes in version 0.2.3.11-alpha - 2012-01-22
26407 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
26408 the last step of the plan to limit maximum circuit length, includes
26409 a wide variety of hidden service performance and correctness fixes,
26410 works around an OpenSSL security flaw if your distro is too stubborn
26411 to upgrade, and fixes a bunch of smaller issues.
26414 - Now that Tor 0.2.0.x is completely deprecated, enable the final
26415 part of "Proposal 110: Avoiding infinite length circuits" by
26416 refusing all circuit-extend requests that do not use a relay_early
26417 cell. This change helps Tor resist a class of denial-of-service
26418 attacks by limiting the maximum circuit length.
26419 - Adjust the number of introduction points that a hidden service
26420 will try to maintain based on how long its introduction points
26421 remain in use and how many introductions they handle. Fixes
26423 - Try to use system facilities for enumerating local interface
26424 addresses, before falling back to our old approach (which was
26425 binding a UDP socket, and calling getsockname() on it). That
26426 approach was scaring OS X users whose draconian firewall
26427 software warned about binding to UDP sockets, regardless of
26428 whether packets were sent. Now we try to use getifaddrs(),
26429 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
26430 system supports. Resolves ticket 1827.
26432 o Major security workaround:
26433 - When building or running with any version of OpenSSL earlier
26434 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26435 versions have a bug (CVE-2011-4576) in which their block cipher
26436 padding includes uninitialized data, potentially leaking sensitive
26437 information to any peer with whom they make a SSLv3 connection. Tor
26438 does not use SSL v3 by default, but a hostile client or server
26439 could force an SSLv3 connection in order to gain information that
26440 they shouldn't have been able to get. The best solution here is to
26441 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26442 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26443 to make sure that the bug can't happen.
26446 - Fix the SOCKET_OK test that we use to tell when socket
26447 creation fails so that it works on Win64. Fixes part of bug 4533;
26448 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26449 - Correct our replacements for the timeradd() and timersub() functions
26450 on platforms that lack them (for example, Windows). The timersub()
26451 function is used when expiring circuits, while timeradd() is
26452 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26453 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
26454 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
26455 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
26456 bug at runtime, not compile time, because some distributions hack
26457 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
26458 on 0.2.3.9-alpha. Found by Pascal.
26460 o Minor features (controller):
26461 - Use absolute path names when reporting the torrc filename in the
26462 control protocol, so a controller can more easily find the torrc
26463 file. Resolves bug 1101.
26464 - Extend the control protocol to report flags that control a circuit's
26465 path selection in CIRC events and in replies to 'GETINFO
26466 circuit-status'. Implements part of ticket 2411.
26467 - Extend the control protocol to report the hidden service address
26468 and current state of a hidden-service-related circuit in CIRC
26469 events and in replies to 'GETINFO circuit-status'. Implements part
26471 - When reporting the path to the cookie file to the controller,
26472 give an absolute path. Resolves ticket 4881.
26473 - Allow controllers to request an event notification whenever a
26474 circuit is cannibalized or its purpose is changed. Implements
26475 part of ticket 3457.
26476 - Include the creation time of a circuit in CIRC and CIRC2
26477 control-port events and the list produced by the 'GETINFO
26478 circuit-status' control-port command.
26480 o Minor features (directory authorities):
26481 - Directory authorities now reject versions of Tor older than
26482 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26483 inclusive. These versions accounted for only a small fraction of
26484 the Tor network, and have numerous known security issues. Resolves
26486 - Authority operators can now vote for all relays in a given
26487 set of countries to be BadDir/BadExit/Invalid/Rejected.
26488 - Provide two consensus parameters (FastFlagMinThreshold and
26489 FastFlagMaxThreshold) to control the range of allowable bandwidths
26490 for the Fast directory flag. These allow authorities to run
26491 experiments on appropriate requirements for being a "Fast" node.
26492 The AuthDirFastGuarantee config value still applies. Implements
26494 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26495 directory authority option (introduced in Tor 0.2.2.34).
26497 o Minor features (other):
26498 - Don't disable the DirPort when we cannot exceed our AccountingMax
26499 limit during this interval because the effective bandwidthrate is
26500 low enough. This is useful in a situation where AccountMax is only
26501 used as an additional safeguard or to provide statistics.
26502 - Prepend an informative header to generated dynamic_dh_params files.
26503 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
26504 EntryNodes will have no effect. Resolves issue 2571.
26505 - Log more useful messages when we fail to disable debugger
26507 - Log which authority we're missing votes from when we go to fetch
26508 them from the other auths.
26509 - Log (at debug level) whenever a circuit's purpose is changed.
26510 - Add missing documentation for the MaxClientCircuitsPending,
26511 UseMicrodescriptors, UserspaceIOCPBuffers, and
26512 _UseFilteringSSLBufferevents options, all introduced during
26513 the 0.2.3.x series.
26514 - Update to the January 3 2012 Maxmind GeoLite Country database.
26516 o Minor bugfixes (hidden services):
26517 - Don't close hidden service client circuits which have almost
26518 finished connecting to their destination when they reach
26519 the normal circuit-build timeout. Previously, we would close
26520 introduction circuits which are waiting for an acknowledgement
26521 from the introduction point, and rendezvous circuits which have
26522 been specified in an INTRODUCE1 cell sent to a hidden service,
26523 after the normal CBT. Now, we mark them as 'timed out', and launch
26524 another rendezvous attempt in parallel. This behavior change can
26525 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
26526 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
26527 - Don't close hidden-service-side rendezvous circuits when they
26528 reach the normal circuit-build timeout. This behavior change can
26529 be disabled using the new
26530 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
26531 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
26532 - Make sure we never mark the wrong rendezvous circuit as having
26533 had its introduction cell acknowledged by the introduction-point
26534 relay. Previously, when we received an INTRODUCE_ACK cell on a
26535 client-side hidden-service introduction circuit, we might have
26536 marked a rendezvous circuit other than the one we specified in
26537 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
26538 a warning message and interfered with the hidden service
26539 connection-establishment process. Fixes bug 4759; bugfix on
26540 0.2.3.3-alpha, when we added the stream-isolation feature which
26541 might cause Tor to open multiple rendezvous circuits for the same
26543 - Don't trigger an assertion failure when we mark a new client-side
26544 hidden-service introduction circuit for close during the process
26545 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
26548 o Minor bugfixes (log messages):
26549 - Correctly spell "connect" in a log message on failure to create a
26550 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
26552 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26553 Fixes bug 4856; bugfix on Tor 0.0.6.
26554 - Fix the log message describing how we work around discovering
26555 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
26556 4837; bugfix on 0.2.2.9-alpha.
26557 - When logging about a disallowed .exit name, do not also call it
26558 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
26560 o Minor bugfixes (build fixes):
26561 - During configure, detect when we're building with clang version
26562 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26563 CFLAGS. clang doesn't support them yet.
26564 - During configure, search for library containing cos function as
26565 libm lives in libcore on some platforms (BeOS/Haiku). Linking
26566 against libm was hard-coded before. Fixes the first part of bug
26567 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
26569 - Detect attempts to build Tor on (as yet hypothetical) versions
26570 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
26571 fix for bug 4533. Bugfix on 0.2.2.28-beta.
26572 - Preprocessor directives should not be put inside the arguments
26573 of a macro. This would break compilation with GCC releases prior
26574 to version 3.3. We would never recommend such an old GCC version,
26575 but it is apparently required for binary compatibility on some
26576 platforms (namely, certain builds of Haiku). Fixes the other part
26577 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
26580 o Minor bugfixes (other):
26581 - Older Linux kernels erroneously respond to strange nmap behavior
26582 by having accept() return successfully with a zero-length
26583 socket. When this happens, just close the connection. Previously,
26584 we would try harder to learn the remote address: but there was
26585 no such remote address to learn, and our method for trying to
26586 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26587 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26588 - Fix null-pointer access that could occur if TLS allocation failed.
26589 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
26590 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
26591 accidentally been reverted.
26592 - Fix our implementation of crypto_random_hostname() so it can't
26593 overflow on ridiculously large inputs. (No Tor version has ever
26594 provided this kind of bad inputs, but let's be correct in depth.)
26595 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
26596 - Find more places in the code that should have been testing for
26597 invalid sockets using the SOCKET_OK macro. Required for a fix
26598 for bug 4533. Bugfix on 0.2.2.28-beta.
26599 - Fix an assertion failure when, while running with bufferevents, a
26600 connection finishes connecting after it is marked for close, but
26601 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
26602 - test_util_spawn_background_ok() hardcoded the expected value
26603 for ENOENT to 2. This isn't portable as error numbers are
26604 platform specific, and particularly the hurd has ENOENT at
26605 0x40000002. Construct expected string at runtime, using the correct
26606 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
26607 - Reject attempts to disable DisableDebuggerAttachment while Tor is
26608 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
26609 - Use an appropriate-width type for sockets in tor-fw-helper on
26610 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
26613 - When sending or relaying a RELAY_EARLY cell, we used to convert
26614 it to a RELAY cell if the connection was using the v1 link
26615 protocol. This was a workaround for older versions of Tor, which
26616 didn't handle RELAY_EARLY cells properly. Now that all supported
26617 versions can handle RELAY_EARLY cells, and now that we're enforcing
26618 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26619 remove this workaround. Addresses bug 4786.
26621 o Code simplifications and refactoring:
26622 - Use OpenSSL's built-in SSL_state_string_long() instead of our
26623 own homebrewed ssl_state_to_string() replacement. Patch from
26624 Emile Snyder. Fixes bug 4653.
26625 - Use macros to indicate OpenSSL versions, so we don't need to worry
26626 about accidental hexadecimal bit shifts.
26627 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
26629 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
26630 - Use the smartlist_add_asprintf() alias more consistently.
26631 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
26632 invalid value, rather than just -1.
26633 - Rename a handful of old identifiers, mostly related to crypto
26634 structures and crypto functions. By convention, our "create an
26635 object" functions are called "type_new()", our "free an object"
26636 functions are called "type_free()", and our types indicate that
26637 they are types only with a final "_t". But a handful of older
26638 types and functions broke these rules, with function names like
26639 "type_create" or "subsystem_op_type", or with type names like
26643 Changes in version 0.2.3.10-alpha - 2011-12-16
26644 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
26645 Tor's buffers code. Absolutely everybody should upgrade.
26647 The bug relied on an incorrect calculation when making data continuous
26648 in one of our IO buffers, if the first chunk of the buffer was
26649 misaligned by just the wrong amount. The miscalculation would allow an
26650 attacker to overflow a piece of heap-allocated memory. To mount this
26651 attack, the attacker would need to either open a SOCKS connection to
26652 Tor's SocksPort (usually restricted to localhost), or target a Tor
26653 instance configured to make its connections through a SOCKS proxy
26654 (which Tor does not do by default).
26656 Good security practice requires that all heap-overflow bugs should be
26657 presumed to be exploitable until proven otherwise, so we are treating
26658 this as a potential code execution attack. Please upgrade immediately!
26659 This bug does not affect bufferevents-based builds of Tor. Special
26660 thanks to "Vektor" for reporting this issue to us!
26662 This release also contains a few minor bugfixes for issues discovered
26666 - Fix a heap overflow bug that could occur when trying to pull
26667 data into the first chunk of a buffer, when that chunk had
26668 already had some data drained from it. Fixes CVE-2011-2778;
26669 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26672 - If we can't attach streams to a rendezvous circuit when we
26673 finish connecting to a hidden service, clear the rendezvous
26674 circuit's stream-isolation state and try to attach streams
26675 again. Previously, we cleared rendezvous circuits' isolation
26676 state either too early (if they were freshly built) or not at all
26677 (if they had been built earlier and were cannibalized). Bugfix on
26678 0.2.3.3-alpha; fixes bug 4655.
26679 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
26680 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
26681 - Fix an assertion failure when a relay with accounting enabled
26682 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
26685 - Update to the December 6 2011 Maxmind GeoLite Country database.
26688 Changes in version 0.2.2.35 - 2011-12-16
26689 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
26690 buffers code. Absolutely everybody should upgrade.
26692 The bug relied on an incorrect calculation when making data continuous
26693 in one of our IO buffers, if the first chunk of the buffer was
26694 misaligned by just the wrong amount. The miscalculation would allow an
26695 attacker to overflow a piece of heap-allocated memory. To mount this
26696 attack, the attacker would need to either open a SOCKS connection to
26697 Tor's SocksPort (usually restricted to localhost), or target a Tor
26698 instance configured to make its connections through a SOCKS proxy
26699 (which Tor does not do by default).
26701 Good security practice requires that all heap-overflow bugs should be
26702 presumed to be exploitable until proven otherwise, so we are treating
26703 this as a potential code execution attack. Please upgrade immediately!
26704 This bug does not affect bufferevents-based builds of Tor. Special
26705 thanks to "Vektor" for reporting this issue to us!
26707 Tor 0.2.2.35 also fixes several bugs in previous versions, including
26708 crash bugs for unusual configurations, and a long-term bug that
26709 would prevent Tor from starting on Windows machines with draconian
26712 With this release, we remind everyone that 0.2.0.x has reached its
26713 formal end-of-life. Those Tor versions have many known flaws, and
26714 nobody should be using them. You should upgrade -- ideally to the
26715 0.2.2.x series. If you're using a Linux or BSD and its packages are
26716 obsolete, stop using those packages and upgrade anyway.
26718 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
26719 longer receive support after some time in early 2012.
26722 - Fix a heap overflow bug that could occur when trying to pull
26723 data into the first chunk of a buffer, when that chunk had
26724 already had some data drained from it. Fixes CVE-2011-2778;
26725 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26726 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
26727 that it doesn't attempt to allocate a socketpair. This could cause
26728 some problems on Windows systems with overzealous firewalls. Fix for
26729 bug 4457; workaround for Libevent versions 2.0.1-alpha through
26731 - If we mark an OR connection for close based on a cell we process,
26732 don't process any further cells on it. We already avoid further
26733 reads on marked-for-close connections, but now we also discard the
26734 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
26735 which was the first version where we might mark a connection for
26736 close based on processing a cell on it.
26737 - Correctly sanity-check that we don't underflow on a memory
26738 allocation (and then assert) for hidden service introduction
26739 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26740 bugfix on 0.2.1.5-alpha.
26741 - Fix a memory leak when we check whether a hidden service
26742 descriptor has any usable introduction points left. Fixes bug
26743 4424. Bugfix on 0.2.2.25-alpha.
26744 - Don't crash when we're running as a relay and don't have a GeoIP
26745 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
26746 we've had in the 0.2.3.x branch already.
26747 - When running as a client, do not print a misleading (and plain
26748 wrong) log message that we're collecting "directory request"
26749 statistics: clients don't collect statistics. Also don't create a
26750 useless (because empty) stats file in the stats/ directory. Fixes
26751 bug 4353; bugfix on 0.2.2.34.
26754 - Detect failure to initialize Libevent. This fix provides better
26755 detection for future instances of bug 4457.
26756 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26757 function. This was eating up hideously large amounts of time on some
26758 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26759 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26760 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26762 - Don't warn about unused log_mutex in log.c when building with
26763 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26764 0.1.0.6-rc which introduced --disable-threads.
26765 - When configuring, starting, or stopping an NT service, stop
26766 immediately after the service configuration attempt has succeeded
26767 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
26768 - When sending a NETINFO cell, include the original address
26769 received for the other side, not its canonical address. Found
26770 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
26771 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
26772 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
26773 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
26774 occurred when a client tried to fetch a descriptor for a bridge
26775 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
26776 - Backport fixes for a pair of compilation warnings on Windows.
26777 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
26778 - If we had ever tried to call tor_addr_to_str on an address of
26779 unknown type, we would have done a strdup on an uninitialized
26780 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26781 Reported by "troll_un".
26782 - Correctly detect and handle transient lookup failures from
26783 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26784 Reported by "troll_un".
26785 - Fix null-pointer access that could occur if TLS allocation failed.
26786 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26787 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26788 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26791 - Add two new config options for directory authorities:
26792 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
26793 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
26794 that is always sufficient to satisfy the bandwidth requirement for
26795 the Guard flag. Now it will be easier for researchers to simulate
26796 Tor networks with different values. Resolves ticket 4484.
26797 - When Tor ignores a hidden service specified in its configuration,
26798 include the hidden service's directory in the warning message.
26799 Previously, we would only tell the user that some hidden service
26800 was ignored. Bugfix on 0.0.6; fixes bug 4426.
26801 - Update to the December 6 2011 Maxmind GeoLite Country database.
26803 o Packaging changes:
26804 - Make it easier to automate expert package builds on Windows,
26805 by removing an absolute path from makensis.exe command.
26808 Changes in version 0.2.1.32 - 2011-12-16
26809 Tor 0.2.1.32 backports important security and privacy fixes for
26810 oldstable. This release is intended only for package maintainers and
26811 others who cannot use the 0.2.2 stable series. All others should be
26812 using Tor 0.2.2.x or newer.
26814 The Tor 0.2.1.x series will reach formal end-of-life some time in
26815 early 2012; we will stop releasing patches for it then.
26817 o Major bugfixes (also included in 0.2.2.x):
26818 - Correctly sanity-check that we don't underflow on a memory
26819 allocation (and then assert) for hidden service introduction
26820 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26821 bugfix on 0.2.1.5-alpha.
26822 - Fix a heap overflow bug that could occur when trying to pull
26823 data into the first chunk of a buffer, when that chunk had
26824 already had some data drained from it. Fixes CVE-2011-2778;
26825 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26828 - Update to the December 6 2011 Maxmind GeoLite Country database.
26831 Changes in version 0.2.3.9-alpha - 2011-12-08
26832 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
26833 a "DisableNetwork" security feature that bundles can use to avoid
26834 touching the network until bridges are configured, moves forward on
26835 the pluggable transport design, fixes a flaw in the hidden service
26836 design that unnecessarily prevented clients with wrong clocks from
26837 reaching hidden services, and fixes a wide variety of other issues.
26840 - Clients can now connect to private bridges over IPv6. Bridges
26841 still need at least one IPv4 address in order to connect to
26842 other relays. Note that we don't yet handle the case where the
26843 user has two bridge lines for the same bridge (one IPv4, one
26844 IPv6). Implements parts of proposal 186.
26845 - New "DisableNetwork" config option to prevent Tor from launching any
26846 connections or accepting any connections except on a control port.
26847 Bundles and controllers can set this option before letting Tor talk
26848 to the rest of the network, for example to prevent any connections
26849 to a non-bridge address. Packages like Orbot can also use this
26850 option to instruct Tor to save power when the network is off.
26851 - Clients and bridges can now be configured to use a separate
26852 "transport" proxy. This approach makes the censorship arms race
26853 easier by allowing bridges to use protocol obfuscation plugins. It
26854 implements the "managed proxy" part of proposal 180 (ticket 3472).
26855 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
26856 implementation. It makes AES_CTR about 7% faster than our old one
26857 (which was about 10% faster than the one OpenSSL used to provide).
26858 Resolves ticket 4526.
26859 - Add a "tor2web mode" for clients that want to connect to hidden
26860 services non-anonymously (and possibly more quickly). As a safety
26861 measure to try to keep users from turning this on without knowing
26862 what they are doing, tor2web mode must be explicitly enabled at
26863 compile time, and a copy of Tor compiled to run in tor2web mode
26864 cannot be used as a normal Tor client. Implements feature 2553.
26865 - Add experimental support for running on Windows with IOCP and no
26866 kernel-space socket buffers. This feature is controlled by a new
26867 "UserspaceIOCPBuffers" config option (off by default), which has
26868 no effect unless Tor has been built with support for bufferevents,
26869 is running on Windows, and has enabled IOCP. This may, in the long
26870 run, help solve or mitigate bug 98.
26871 - Use a more secure consensus parameter voting algorithm. Now at
26872 least three directory authorities or a majority of them must
26873 vote on a given parameter before it will be included in the
26874 consensus. Implements proposal 178.
26877 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
26878 They used to check that the timestamp was within 30 minutes
26879 of their system clock, so they could cap the size of their
26880 replay-detection cache, but that approach unnecessarily refused
26881 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
26882 the v3 intro-point protocol (the first one which sent a timestamp
26883 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
26884 - Only use the EVP interface when AES acceleration is enabled,
26885 to avoid a 5-7% performance regression. Resolves issue 4525;
26886 bugfix on 0.2.3.8-alpha.
26888 o Privacy/anonymity features (bridge detection):
26889 - Make bridge SSL certificates a bit more stealthy by using random
26890 serial numbers, in the same fashion as OpenSSL when generating
26891 self-signed certificates. Implements ticket 4584.
26892 - Introduce a new config option "DynamicDHGroups", enabled by
26893 default, which provides each bridge with a unique prime DH modulus
26894 to be used during SSL handshakes. This option attempts to help
26895 against censors who might use the Apache DH modulus as a static
26896 identifier for bridges. Addresses ticket 4548.
26898 o Minor features (new/different config options):
26899 - New configuration option "DisableDebuggerAttachment" (on by default)
26900 to prevent basic debugging attachment attempts by other processes.
26901 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
26902 - Allow MapAddress directives to specify matches against super-domains,
26903 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
26904 Implements issue 933.
26905 - Slightly change behavior of "list" options (that is, config
26906 options that can appear more than once) when they appear both in
26907 torrc and on the command line. Previously, the command-line options
26908 would be appended to the ones from torrc. Now, the command-line
26909 options override the torrc options entirely. This new behavior
26910 allows the user to override list options (like exit policies and
26911 ports to listen on) from the command line, rather than simply
26912 appending to the list.
26913 - You can get the old (appending) command-line behavior for "list"
26914 options by prefixing the option name with a "+".
26915 - You can remove all the values for a "list" option from the command
26916 line without adding any new ones by prefixing the option name
26918 - Add experimental support for a "defaults" torrc file to be parsed
26919 before the regular torrc. Torrc options override the defaults file's
26920 options in the same way that the command line overrides the torrc.
26921 The SAVECONF controller command saves only those options which
26922 differ between the current configuration and the defaults file. HUP
26923 reloads both files. (Note: This is an experimental feature; its
26924 behavior will probably be refined in future 0.2.3.x-alpha versions
26925 to better meet packagers' needs.) Implements task 4552.
26928 - Try to make the introductory warning message that Tor prints on
26929 startup more useful for actually finding help and information.
26930 Resolves ticket 2474.
26931 - Running "make version" now displays the version of Tor that
26932 we're about to build. Idea from katmagic; resolves issue 4400.
26933 - Expire old or over-used hidden service introduction points.
26934 Required by fix for bug 3460.
26935 - Move the replay-detection cache for the RSA-encrypted parts of
26936 INTRODUCE2 cells to the introduction point data structures.
26937 Previously, we would use one replay-detection cache per hidden
26938 service. Required by fix for bug 3460.
26939 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
26940 public key replay-detection cache from 60 minutes to 5 minutes. This
26941 replay-detection cache is now used only to detect multiple
26942 INTRODUCE2 cells specifying the same rendezvous point, so we can
26943 avoid launching multiple simultaneous attempts to connect to it.
26945 o Minor bugfixes (on Tor 0.2.2.x and earlier):
26946 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26947 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26949 - Fix a minor formatting issue in one of tor-gencert's error messages.
26951 - Prevent a false positive from the check-spaces script, by disabling
26952 the "whitespace between function name and (" check for functions
26954 - Fix a log message suggesting that people contact a non-existent
26955 email address. Fixes bug 3448.
26956 - Fix null-pointer access that could occur if TLS allocation failed.
26957 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26958 - Report a real bootstrap problem to the controller on router
26959 identity mismatch. Previously we just said "foo", which probably
26960 made a lot of sense at the time. Fixes bug 4169; bugfix on
26962 - If we had ever tried to call tor_addr_to_str() on an address of
26963 unknown type, we would have done a strdup() on an uninitialized
26964 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26965 Reported by "troll_un".
26966 - Correctly detect and handle transient lookup failures from
26967 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26968 Reported by "troll_un".
26969 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26970 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26971 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
26972 bug 4532; found by "troll_un".
26974 o Minor bugfixes (on Tor 0.2.3.x):
26975 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
26977 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
26978 circuit for use as a hidden service client's rendezvous point.
26979 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
26980 with help from wanoskarnet.
26981 - Restore behavior of overriding SocksPort, ORPort, and similar
26982 options from the command line. Bugfix on 0.2.3.3-alpha.
26985 - Properly handle the case where the build-tree is not the same
26986 as the source tree when generating src/common/common_sha1.i,
26987 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
26988 bugfix on 0.2.0.1-alpha.
26990 o Code simplifications, cleanups, and refactorings:
26991 - Remove the pure attribute from all functions that used it
26992 previously. In many cases we assigned it incorrectly, because the
26993 functions might assert or call impure functions, and we don't have
26994 evidence that keeping the pure attribute is worthwhile. Implements
26995 changes suggested in ticket 4421.
26996 - Remove some dead code spotted by coverity. Fixes cid 432.
26997 Bugfix on 0.2.3.1-alpha, closes bug 4637.
27000 Changes in version 0.2.3.8-alpha - 2011-11-22
27001 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
27002 socketpair-related bug that has been bothering Windows users. It adds
27003 support to serve microdescriptors to controllers, so Vidalia's network
27004 map can resume listing relays (once Vidalia implements its side),
27005 and adds better support for hardware AES acceleration. Finally, it
27006 starts the process of adjusting the bandwidth cutoff for getting the
27007 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
27008 that tiny relays harm performance more than they help network capacity.
27011 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
27012 that it doesn't attempt to allocate a socketpair. This could cause
27013 some problems on Windows systems with overzealous firewalls. Fix for
27014 bug 4457; workaround for Libevent versions 2.0.1-alpha through
27016 - Correctly sanity-check that we don't underflow on a memory
27017 allocation (and then assert) for hidden service introduction
27018 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
27019 bugfix on 0.2.1.5-alpha.
27020 - Remove the artificially low cutoff of 20KB to guarantee the Fast
27021 flag. In the past few years the average relay speed has picked
27022 up, and while the "top 7/8 of the network get the Fast flag" and
27023 "all relays with 20KB or more of capacity get the Fast flag" rules
27024 used to have the same result, now the top 7/8 of the network has
27025 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
27026 - Fix a rare assertion failure when checking whether a v0 hidden
27027 service descriptor has any usable introduction points left, and
27028 we don't have enough information to build a circuit to the first
27029 intro point named in the descriptor. The HS client code in
27030 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
27031 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
27032 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
27033 - Make bridge authorities not crash when they are asked for their own
27034 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
27035 - When running as a client, do not print a misleading (and plain
27036 wrong) log message that we're collecting "directory request"
27037 statistics: clients don't collect statistics. Also don't create a
27038 useless (because empty) stats file in the stats/ directory. Fixes
27039 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
27042 - Allow Tor controllers like Vidalia to obtain the microdescriptor
27043 for a relay by identity digest or nickname. Previously,
27044 microdescriptors were only available by their own digests, so a
27045 controller would have to ask for and parse the whole microdescriptor
27046 consensus in order to look up a single relay's microdesc. Fixes
27047 bug 3832; bugfix on 0.2.3.1-alpha.
27048 - Use OpenSSL's EVP interface for AES encryption, so that all AES
27049 operations can use hardware acceleration (if present). Resolves
27052 o Minor bugfixes (on 0.2.2.x and earlier):
27053 - Detect failure to initialize Libevent. This fix provides better
27054 detection for future instances of bug 4457.
27055 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
27056 function. This was eating up hideously large amounts of time on some
27057 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
27058 - Don't warn about unused log_mutex in log.c when building with
27059 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
27060 0.1.0.6-rc which introduced --disable-threads.
27061 - Allow manual 'authenticate' commands to the controller interface
27062 from netcat (nc) as well as telnet. We were rejecting them because
27063 they didn't come with the expected whitespace at the end of the
27064 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
27065 - Fix some (not actually triggerable) buffer size checks in usage of
27066 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
27068 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
27069 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
27070 - When configuring, starting, or stopping an NT service, stop
27071 immediately after the service configuration attempt has succeeded
27072 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
27073 - When sending a NETINFO cell, include the original address
27074 received for the other side, not its canonical address. Found
27075 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
27076 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
27077 can pick them up when the tests aren't disabled. Bugfix on
27078 0.2.2.4-alpha which introduced tinytest.
27079 - Fix a memory leak when we check whether a hidden service
27080 descriptor has any usable introduction points left. Fixes bug
27081 4424. Bugfix on 0.2.2.25-alpha.
27082 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
27083 occurred when a client tried to fetch a descriptor for a bridge
27084 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
27086 o Minor bugfixes (on 0.2.3.x):
27087 - Make util unit tests build correctly with MSVC. Bugfix on
27088 0.2.3.3-alpha. Patch by Gisle Vanem.
27089 - Successfully detect AUTH_CHALLENGE cells with no recognized
27090 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
27091 Found by frosty_un.
27092 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
27093 it should still send a NETINFO cell to allow the connection to
27094 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
27096 - Log less loudly when we get an invalid authentication certificate
27097 from a source other than a directory authority: it's not unusual
27098 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
27100 - Tolerate servers with more clock skew in their authentication
27101 certificates than previously. Fixes bug 4371; bugfix on
27103 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
27104 on 0.2.3.4-alpha and 0.2.3.6-alpha.
27107 - Add two new config options for directory authorities:
27108 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
27109 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
27110 that is always sufficient to satisfy the bandwidth requirement for
27111 the Guard flag. Now it will be easier for researchers to simulate
27112 Tor networks with different values. Resolves ticket 4484.
27113 - When Tor ignores a hidden service specified in its configuration,
27114 include the hidden service's directory in the warning message.
27115 Previously, we would only tell the user that some hidden service
27116 was ignored. Bugfix on 0.0.6; fixes bug 4426.
27117 - When we fail to initialize Libevent, retry with IOCP disabled so we
27118 don't need to turn on multi-threading support in Libevent, which in
27119 turn requires a working socketpair(). This is a workaround for bug
27120 4457, which affects Libevent versions from 2.0.1-alpha through
27122 - Detect when we try to build on a platform that doesn't define
27123 AF_UNSPEC to 0. We don't work there, so refuse to compile.
27124 - Update to the November 1 2011 Maxmind GeoLite Country database.
27126 o Packaging changes:
27127 - Make it easier to automate expert package builds on Windows,
27128 by removing an absolute path from makensis.exe command.
27130 o Code simplifications and refactoring:
27131 - Remove some redundant #include directives throughout the code.
27132 Patch from Andrea Gelmini.
27133 - Unconditionally use OpenSSL's AES implementation instead of our
27134 old built-in one. OpenSSL's AES has been better for a while, and
27135 relatively few servers should still be on any version of OpenSSL
27136 that doesn't have good optimized assembly AES.
27137 - Use the name "CERTS" consistently to refer to the new cell type;
27138 we were calling it CERT in some places and CERTS in others.
27141 - Numerous new unit tests for functions in util.c and address.c by
27143 - The long-disabled benchmark tests are now split into their own
27144 ./src/test/bench binary.
27145 - The benchmark tests can now use more accurate timers than
27146 gettimeofday() when such timers are available.
27149 Changes in version 0.2.3.7-alpha - 2011-10-30
27150 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
27151 the new v3 handshake. It also resolves yet another bridge address
27155 - If we mark an OR connection for close based on a cell we process,
27156 don't process any further cells on it. We already avoid further
27157 reads on marked-for-close connections, but now we also discard the
27158 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
27159 which was the first version where we might mark a connection for
27160 close based on processing a cell on it.
27161 - Fix a double-free bug that would occur when we received an invalid
27162 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
27163 bugfix on 0.2.3.6-alpha.
27164 - Bridges no longer include their address in NETINFO cells on outgoing
27165 OR connections, to allow them to blend in better with clients.
27166 Removes another avenue for enumerating bridges. Reported by
27167 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
27168 cells were introduced.
27171 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
27172 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
27175 Changes in version 0.2.3.6-alpha - 2011-10-26
27176 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
27177 anonymity vulnerability where an attacker can deanonymize Tor
27178 users. Everybody should upgrade.
27180 This release also features support for a new v3 connection handshake
27181 protocol, and fixes to make hidden service connections more robust.
27184 - Implement a new handshake protocol (v3) for authenticating Tors to
27185 each other over TLS. It should be more resistant to fingerprinting
27186 than previous protocols, and should require less TLS hacking for
27187 future Tor implementations. Implements proposal 176.
27188 - Allow variable-length padding cells to disguise the length of
27189 Tor's TLS records. Implements part of proposal 184.
27191 o Privacy/anonymity fixes (clients):
27192 - Clients and bridges no longer send TLS certificate chains on
27193 outgoing OR connections. Previously, each client or bridge would
27194 use the same cert chain for all outgoing OR connections until
27195 its IP address changes, which allowed any relay that the client
27196 or bridge contacted to determine which entry guards it is using.
27197 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27198 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27199 no longer considers that connection as suitable for satisfying a
27200 circuit EXTEND request. Now relays can protect clients from the
27201 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27202 - Directory authorities no longer assign the Guard flag to relays
27203 that haven't upgraded to the above "refuse EXTEND requests
27204 to client connections" fix. Now directory authorities can
27205 protect clients from the CVE-2011-2768 issue even if neither
27206 the clients nor the relays have upgraded yet. There's a new
27207 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27208 to let us transition smoothly, else tomorrow there would be no
27211 o Major bugfixes (hidden services):
27212 - Improve hidden service robustness: when an attempt to connect to
27213 a hidden service ends, be willing to refetch its hidden service
27214 descriptors from each of the HSDir relays responsible for them
27215 immediately. Previously, we would not consider refetching the
27216 service's descriptors from each HSDir for 15 minutes after the last
27217 fetch, which was inconvenient if the hidden service was not running
27218 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
27219 - When one of a hidden service's introduction points appears to be
27220 unreachable, stop trying it. Previously, we would keep trying
27221 to build circuits to the introduction point until we lost the
27222 descriptor, usually because the user gave up and restarted Tor.
27223 Partly fixes bug 3825.
27224 - Don't launch a useless circuit after failing to use one of a
27225 hidden service's introduction points. Previously, we would
27226 launch a new introduction circuit, but not set the hidden service
27227 which that circuit was intended to connect to, so it would never
27228 actually be used. A different piece of code would then create a
27229 new introduction circuit correctly. Bug reported by katmagic and
27230 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27232 o Major bugfixes (other):
27233 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27234 that they initiated. Relays could distinguish incoming bridge
27235 connections from client connections, creating another avenue for
27236 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27237 Found by "frosty_un".
27238 - Don't update the AccountingSoftLimitHitAt state file entry whenever
27239 tor gets started. This prevents a wrong average bandwidth
27240 estimate, which would cause relays to always start a new accounting
27241 interval at the earliest possible moment. Fixes bug 2003; bugfix
27242 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
27243 immensely in tracking this bug down.
27244 - Fix a crash bug when changing node restrictions while a DNS lookup
27245 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27248 o Minor bugfixes (on 0.2.2.x and earlier):
27249 - When a hidden service turns an extra service-side introduction
27250 circuit into a general-purpose circuit, free the rend_data and
27251 intro_key fields first, so we won't leak memory if the circuit
27252 is cannibalized for use as another service-side introduction
27253 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27254 - Rephrase the log message emitted if the TestSocks check is
27255 successful. Patch from Fabian Keil; fixes bug 4094.
27256 - Bridges now skip DNS self-tests, to act a little more stealthily.
27257 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27258 bridges. Patch by "warms0x".
27259 - Remove a confusing dollar sign from the example fingerprint in the
27260 man page, and also make the example fingerprint a valid one. Fixes
27261 bug 4309; bugfix on 0.2.1.3-alpha.
27262 - Fix internal bug-checking logic that was supposed to catch
27263 failures in digest generation so that it will fail more robustly
27264 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27265 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27266 - Report any failure in init_keys() calls launched because our
27267 IP address has changed. Spotted by Coverity Scan. Bugfix on
27268 0.1.1.4-alpha; fixes CID 484.
27270 o Minor bugfixes (on 0.2.3.x):
27271 - Fix a bug in configure.in that kept it from building a configure
27272 script with autoconf versions earlier than 2.61. Fixes bug 2430;
27273 bugfix on 0.2.3.1-alpha.
27274 - Don't warn users that they are exposing a client port to the
27275 Internet if they have specified an RFC1918 address. Previously,
27276 we would warn if the user had specified any non-loopback
27277 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
27278 - Fix memory leaks in the failing cases of the new SocksPort and
27279 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
27280 fixes coverity CIDs 485, 486, and 487.
27283 - When a hidden service's introduction point times out, consider
27284 trying it again during the next attempt to connect to the
27285 HS. Previously, we would not try it again unless a newly fetched
27286 descriptor contained it. Required by fixes for bugs 1297 and 3825.
27287 - The next version of Windows will be called Windows 8, and it has
27288 a major version of 6, minor version of 2. Correctly identify that
27289 version instead of calling it "Very recent version". Resolves
27290 ticket 4153; reported by funkstar.
27291 - The Bridge Authority now writes statistics on how many bridge
27292 descriptors it gave out in total, and how many unique descriptors
27293 it gave out. It also lists how often the most and least commonly
27294 fetched descriptors were given out, as well as the median and
27295 25th/75th percentile. Implements tickets 4200 and 4294.
27296 - Update to the October 4 2011 Maxmind GeoLite Country database.
27298 o Code simplifications and refactoring:
27299 - Remove some old code to remember statistics about which descriptors
27300 we've served as a directory mirror. The feature wasn't used and
27301 is outdated now that microdescriptors are around.
27302 - Rename Tor functions that turn strings into addresses, so that
27303 "parse" indicates that no hostname resolution occurs, and
27304 "lookup" indicates that hostname resolution may occur. This
27305 should help prevent mistakes in the future. Fixes bug 3512.
27308 Changes in version 0.2.2.34 - 2011-10-26
27309 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
27310 can deanonymize Tor users. Everybody should upgrade.
27312 The attack relies on four components: 1) Clients reuse their TLS cert
27313 when talking to different relays, so relays can recognize a user by
27314 the identity key in her cert. 2) An attacker who knows the client's
27315 identity key can probe each guard relay to see if that identity key
27316 is connected to that guard relay right now. 3) A variety of active
27317 attacks in the literature (starting from "Low-Cost Traffic Analysis
27318 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
27319 discover the guard relays that a Tor user visiting the website is using.
27320 4) Clients typically pick three guards at random, so the set of guards
27321 for a given user could well be a unique fingerprint for her. This
27322 release fixes components #1 and #2, which is enough to block the attack;
27323 the other two remain as open research problems. Special thanks to
27324 "frosty_un" for reporting the issue to us!
27326 Clients should upgrade so they are no longer recognizable by the TLS
27327 certs they present. Relays should upgrade so they no longer allow a
27328 remote attacker to probe them to test whether unpatched clients are
27329 currently connected to them.
27331 This release also fixes several vulnerabilities that allow an attacker
27332 to enumerate bridge relays. Some bridge enumeration attacks still
27333 remain; see for example proposal 188.
27335 o Privacy/anonymity fixes (clients):
27336 - Clients and bridges no longer send TLS certificate chains on
27337 outgoing OR connections. Previously, each client or bridge would
27338 use the same cert chain for all outgoing OR connections until
27339 its IP address changes, which allowed any relay that the client
27340 or bridge contacted to determine which entry guards it is using.
27341 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27342 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27343 no longer considers that connection as suitable for satisfying a
27344 circuit EXTEND request. Now relays can protect clients from the
27345 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27346 - Directory authorities no longer assign the Guard flag to relays
27347 that haven't upgraded to the above "refuse EXTEND requests
27348 to client connections" fix. Now directory authorities can
27349 protect clients from the CVE-2011-2768 issue even if neither
27350 the clients nor the relays have upgraded yet. There's a new
27351 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27352 to let us transition smoothly, else tomorrow there would be no
27355 o Privacy/anonymity fixes (bridge enumeration):
27356 - Bridge relays now do their directory fetches inside Tor TLS
27357 connections, like all the other clients do, rather than connecting
27358 directly to the DirPort like public relays do. Removes another
27359 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27360 - Bridges relays now build circuits for themselves in a more similar
27361 way to how clients build them. Removes another avenue for
27362 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27363 when bridges were introduced.
27364 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27365 that they initiated. Relays could distinguish incoming bridge
27366 connections from client connections, creating another avenue for
27367 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27368 Found by "frosty_un".
27371 - Fix a crash bug when changing node restrictions while a DNS lookup
27372 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27374 - Don't launch a useless circuit after failing to use one of a
27375 hidden service's introduction points. Previously, we would
27376 launch a new introduction circuit, but not set the hidden service
27377 which that circuit was intended to connect to, so it would never
27378 actually be used. A different piece of code would then create a
27379 new introduction circuit correctly. Bug reported by katmagic and
27380 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27383 - Change an integer overflow check in the OpenBSD_Malloc code so
27384 that GCC is less likely to eliminate it as impossible. Patch
27385 from Mansour Moufid. Fixes bug 4059.
27386 - When a hidden service turns an extra service-side introduction
27387 circuit into a general-purpose circuit, free the rend_data and
27388 intro_key fields first, so we won't leak memory if the circuit
27389 is cannibalized for use as another service-side introduction
27390 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27391 - Bridges now skip DNS self-tests, to act a little more stealthily.
27392 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27393 bridges. Patch by "warms0x".
27394 - Fix internal bug-checking logic that was supposed to catch
27395 failures in digest generation so that it will fail more robustly
27396 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27397 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27398 - Report any failure in init_keys() calls launched because our
27399 IP address has changed. Spotted by Coverity Scan. Bugfix on
27400 0.1.1.4-alpha; fixes CID 484.
27402 o Minor bugfixes (log messages and documentation):
27403 - Remove a confusing dollar sign from the example fingerprint in the
27404 man page, and also make the example fingerprint a valid one. Fixes
27405 bug 4309; bugfix on 0.2.1.3-alpha.
27406 - The next version of Windows will be called Windows 8, and it has
27407 a major version of 6, minor version of 2. Correctly identify that
27408 version instead of calling it "Very recent version". Resolves
27409 ticket 4153; reported by funkstar.
27410 - Downgrade log messages about circuit timeout calibration from
27411 "notice" to "info": they don't require or suggest any human
27412 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27413 bugfix on 0.2.2.14-alpha.
27416 - Turn on directory request statistics by default and include them in
27417 extra-info descriptors. Don't break if we have no GeoIP database.
27418 Backported from 0.2.3.1-alpha; implements ticket 3951.
27419 - Update to the October 4 2011 Maxmind GeoLite Country database.
27422 Changes in version 0.2.1.31 - 2011-10-26
27423 Tor 0.2.1.31 backports important security and privacy fixes for
27424 oldstable. This release is intended only for package maintainers and
27425 others who cannot use the 0.2.2 stable series. All others should be
27426 using Tor 0.2.2.x or newer.
27428 o Security fixes (also included in 0.2.2.x):
27429 - Replace all potentially sensitive memory comparison operations
27430 with versions whose runtime does not depend on the data being
27431 compared. This will help resist a class of attacks where an
27432 adversary can use variations in timing information to learn
27433 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27434 implementation by Robert Ransom based partially on code by DJB.)
27435 - Fix an assert in parsing router descriptors containing IPv6
27436 addresses. This one took down the directory authorities when
27437 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27439 o Privacy/anonymity fixes (also included in 0.2.2.x):
27440 - Clients and bridges no longer send TLS certificate chains on
27441 outgoing OR connections. Previously, each client or bridge would
27442 use the same cert chain for all outgoing OR connections until
27443 its IP address changes, which allowed any relay that the client
27444 or bridge contacted to determine which entry guards it is using.
27445 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27446 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27447 no longer considers that connection as suitable for satisfying a
27448 circuit EXTEND request. Now relays can protect clients from the
27449 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27450 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27451 that they initiated. Relays could distinguish incoming bridge
27452 connections from client connections, creating another avenue for
27453 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27454 Found by "frosty_un".
27455 - When receiving a hidden service descriptor, check that it is for
27456 the hidden service we wanted. Previously, Tor would store any
27457 hidden service descriptors that a directory gave it, whether it
27458 wanted them or not. This wouldn't have let an attacker impersonate
27459 a hidden service, but it did let directories pre-seed a client
27460 with descriptors that it didn't want. Bugfix on 0.0.6.
27461 - Avoid linkability based on cached hidden service descriptors: forget
27462 all hidden service descriptors cached as a client when processing a
27463 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27464 - Make the bridge directory authority refuse to answer directory
27465 requests for "all" descriptors. It used to include bridge
27466 descriptors in its answer, which was a major information leak.
27467 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27468 - Don't attach new streams to old rendezvous circuits after SIGNAL
27469 NEWNYM. Previously, we would keep using an existing rendezvous
27470 circuit if it remained open (i.e. if it were kept open by a
27471 long-lived stream, or if a new stream were attached to it before
27472 Tor could notice that it was old and no longer in use). Bugfix on
27473 0.1.1.15-rc; fixes bug 3375.
27475 o Minor bugfixes (also included in 0.2.2.x):
27476 - When we restart our relay, we might get a successful connection
27477 from the outside before we've started our reachability tests,
27478 triggering a warning: "ORPort found reachable, but I have no
27479 routerinfo yet. Failing to inform controller of success." This
27480 bug was harmless unless Tor is running under a controller
27481 like Vidalia, in which case the controller would never get a
27482 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27484 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
27485 enabled. Fixes bug 1526.
27486 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27487 anything since 0.2.1.16-rc.
27488 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27489 None of the cases where we did this before were wrong, but by making
27490 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27491 - Fix a rare crash bug that could occur when a client was configured
27492 with a large number of bridges. Fixes bug 2629; bugfix on
27493 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27494 - Correct the warning displayed when a rendezvous descriptor exceeds
27495 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27497 - Fix an uncommon assertion failure when running with DNSPort under
27498 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27499 - When warning about missing zlib development packages during compile,
27500 give the correct package names. Bugfix on 0.2.0.1-alpha.
27501 - Require that introduction point keys and onion keys have public
27502 exponent 65537. Bugfix on 0.2.0.10-alpha.
27503 - Do not crash when our configuration file becomes unreadable, for
27504 example due to a permissions change, between when we start up
27505 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27507 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27509 - Always NUL-terminate the sun_path field of a sockaddr_un before
27510 passing it to the kernel. (Not a security issue: kernels are
27511 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27512 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27513 - Don't stack-allocate the list of supplementary GIDs when we're
27514 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27515 could take up to 256K, which is way too much stack. Found by
27516 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27518 o Minor bugfixes (only in 0.2.1.x):
27519 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
27520 rely on them. Bugfix on 0.2.1.30.
27521 - Use git revisions instead of svn revisions when generating our
27522 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27524 o Minor features (also included in 0.2.2.x):
27525 - Adjust the expiration time on our SSL session certificates to
27526 better match SSL certs seen in the wild. Resolves ticket 4014.
27527 - Allow nameservers with IPv6 address. Resolves bug 2574.
27528 - Update to the October 4 2011 Maxmind GeoLite Country database.
27531 Changes in version 0.2.3.5-alpha - 2011-09-28
27532 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
27533 bridge relays; fixes an assertion error that many users started hitting
27534 today; and adds the ability to refill token buckets more often than
27535 once per second, allowing significant performance improvements.
27538 - Bridge relays now do their directory fetches inside Tor TLS
27539 connections, like all the other clients do, rather than connecting
27540 directly to the DirPort like public relays do. Removes another
27541 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27542 - Bridges relays now build circuits for themselves in a more similar
27543 way to how clients build them. Removes another avenue for
27544 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27545 when bridges were introduced.
27548 - Fix an "Assertion md->held_by_node == 1 failed" error that could
27549 occur when the same microdescriptor was referenced by two node_t
27550 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
27552 o Major features (networking):
27553 - Add a new TokenBucketRefillInterval option to refill token buckets
27554 more frequently than once per second. This should improve network
27555 performance, alleviate queueing problems, and make traffic less
27556 bursty. Implements proposal 183; closes ticket 3630. Design by
27557 Florian Tschorsch and Björn Scheuermann; implementation by
27561 - Change an integer overflow check in the OpenBSD_Malloc code so
27562 that GCC is less likely to eliminate it as impossible. Patch
27563 from Mansour Moufid. Fixes bug 4059.
27565 o Minor bugfixes (usability):
27566 - Downgrade log messages about circuit timeout calibration from
27567 "notice" to "info": they don't require or suggest any human
27568 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27569 bugfix on 0.2.2.14-alpha.
27571 o Minor features (diagnostics):
27572 - When the system call to create a listener socket fails, log the
27573 error message explaining why. This may help diagnose bug 4027.
27576 Changes in version 0.2.3.4-alpha - 2011-09-13
27577 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
27578 tweak to Tor's TLS handshake that makes relays and bridges that run
27579 this new version reachable from Iran again. It also fixes a few new
27580 bugs in 0.2.3.x, and teaches relays to recognize when they're not
27581 listed in the network consensus and republish.
27583 o Major bugfixes (also part of 0.2.2.33):
27584 - Avoid an assertion failure when reloading a configuration with
27585 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27586 3923; bugfix on 0.2.2.25-alpha.
27588 o Minor features (security, also part of 0.2.2.33):
27589 - Check for replays of the public-key encrypted portion of an
27590 INTRODUCE1 cell, in addition to the current check for replays of
27591 the g^x value. This prevents a possible class of active attacks
27592 by an attacker who controls both an introduction point and a
27593 rendezvous point, and who uses the malleability of AES-CTR to
27594 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27595 that these attacks are infeasible (requiring the attacker to send
27596 on the order of zettabytes of altered cells in a short interval),
27597 but we'd rather block them off in case there are any classes of
27598 this attack that we missed. Reported by Willem Pinckaers.
27600 o Minor features (also part of 0.2.2.33):
27601 - Adjust the expiration time on our SSL session certificates to
27602 better match SSL certs seen in the wild. Resolves ticket 4014.
27603 - Change the default required uptime for a relay to be accepted as
27604 a HSDir (hidden service directory) from 24 hours to 25 hours.
27605 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27606 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27607 authorities to abstain from voting on assignment of the HSDir
27608 consensus flag. Related to bug 2649.
27609 - Update to the September 6 2011 Maxmind GeoLite Country database.
27611 o Minor bugfixes (also part of 0.2.2.33):
27612 - Demote the 'replay detected' log message emitted when a hidden
27613 service receives the same Diffie-Hellman public key in two different
27614 INTRODUCE2 cells to info level. A normal Tor client can cause that
27615 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27616 fixes part of bug 2442.
27617 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27618 level. There is nothing that a hidden service's operator can do
27619 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27621 - Clarify a log message specifying the characters permitted in
27622 HiddenServiceAuthorizeClient client names. Previously, the log
27623 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27624 given the impression that every ASCII character between "+" and "_"
27625 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27627 o Build fixes (also part of 0.2.2.33):
27628 - Clean up some code issues that prevented Tor from building on older
27629 BSDs. Fixes bug 3894; reported by "grarpamp".
27630 - Search for a platform-specific version of "ar" when cross-compiling.
27631 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27634 - Fix a bug where the SocksPort option (for example) would get
27635 ignored and replaced by the default if a SocksListenAddress
27636 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
27640 - Relays now try regenerating and uploading their descriptor more
27641 frequently if they are not listed in the consensus, or if the
27642 version of their descriptor listed in the consensus is too
27643 old. This fix should prevent situations where a server declines
27644 to re-publish itself because it has done so too recently, even
27645 though the authorities decided not to list its recent-enough
27646 descriptor. Fix for bug 3327.
27649 - Relays now include a reason for regenerating their descriptors
27650 in an HTTP header when uploading to the authorities. This will
27651 make it easier to debug descriptor-upload issues in the future.
27652 - When starting as root and then changing our UID via the User
27653 control option, and we have a ControlSocket configured, make sure
27654 that the ControlSocket is owned by the same account that Tor will
27655 run under. Implements ticket 3421; fix by Jérémy Bobbio.
27658 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
27659 utility function used in the control-port code). This shouldn't
27660 ever happen unless Tor is completely out of memory, but if it did
27661 happen and Tor somehow recovered from it, Tor could have sent a log
27662 message to a control port in the middle of a reply to a controller
27663 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
27664 - Make 'FetchUselessDescriptors' cause all descriptor types and
27665 all consensus types (including microdescriptors) to get fetched.
27666 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
27668 o Code refactoring:
27669 - Make a new "entry connection" struct as an internal subtype of "edge
27670 connection", to simplify the code and make exit connections smaller.
27673 Changes in version 0.2.2.33 - 2011-09-13
27674 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
27675 TLS handshake that makes relays and bridges that run this new version
27676 reachable from Iran again.
27679 - Avoid an assertion failure when reloading a configuration with
27680 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27681 3923; bugfix on 0.2.2.25-alpha.
27683 o Minor features (security):
27684 - Check for replays of the public-key encrypted portion of an
27685 INTRODUCE1 cell, in addition to the current check for replays of
27686 the g^x value. This prevents a possible class of active attacks
27687 by an attacker who controls both an introduction point and a
27688 rendezvous point, and who uses the malleability of AES-CTR to
27689 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27690 that these attacks are infeasible (requiring the attacker to send
27691 on the order of zettabytes of altered cells in a short interval),
27692 but we'd rather block them off in case there are any classes of
27693 this attack that we missed. Reported by Willem Pinckaers.
27696 - Adjust the expiration time on our SSL session certificates to
27697 better match SSL certs seen in the wild. Resolves ticket 4014.
27698 - Change the default required uptime for a relay to be accepted as
27699 a HSDir (hidden service directory) from 24 hours to 25 hours.
27700 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27701 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27702 authorities to abstain from voting on assignment of the HSDir
27703 consensus flag. Related to bug 2649.
27704 - Update to the September 6 2011 Maxmind GeoLite Country database.
27706 o Minor bugfixes (documentation and log messages):
27707 - Correct the man page to explain that HashedControlPassword and
27708 CookieAuthentication can both be set, in which case either method
27709 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27710 when we decided to allow these config options to both be set. Issue
27711 raised by bug 3898.
27712 - Demote the 'replay detected' log message emitted when a hidden
27713 service receives the same Diffie-Hellman public key in two different
27714 INTRODUCE2 cells to info level. A normal Tor client can cause that
27715 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27716 fixes part of bug 2442.
27717 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27718 level. There is nothing that a hidden service's operator can do
27719 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27721 - Clarify a log message specifying the characters permitted in
27722 HiddenServiceAuthorizeClient client names. Previously, the log
27723 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27724 given the impression that every ASCII character between "+" and "_"
27725 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27728 - Provide a substitute implementation of lround() for MSVC, which
27729 apparently lacks it. Patch from Gisle Vanem.
27730 - Clean up some code issues that prevented Tor from building on older
27731 BSDs. Fixes bug 3894; reported by "grarpamp".
27732 - Search for a platform-specific version of "ar" when cross-compiling.
27733 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27736 Changes in version 0.2.3.3-alpha - 2011-09-01
27737 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
27738 security, and provides client-side support for the microdescriptor
27739 and optimistic data features introduced earlier in the 0.2.3.x
27740 series. It also includes numerous critical bugfixes in the (optional)
27741 bufferevent-based networking backend.
27743 o Major features (stream isolation):
27744 - You can now configure Tor so that streams from different
27745 applications are isolated on different circuits, to prevent an
27746 attacker who sees your streams as they leave an exit node from
27747 linking your sessions to one another. To do this, choose some way
27748 to distinguish the applications: have them connect to different
27749 SocksPorts, or have one of them use SOCKS4 while the other uses
27750 SOCKS5, or have them pass different authentication strings to the
27751 SOCKS proxy. Then, use the new SocksPort syntax to configure the
27752 degree of isolation you need. This implements Proposal 171.
27753 - There's a new syntax for specifying multiple client ports (such as
27754 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
27755 multiple *Port entries with full addr:port syntax on each.
27756 The old *ListenAddress format is still supported, but you can't
27757 mix it with the new *Port syntax.
27759 o Major features (other):
27760 - Enable microdescriptor fetching by default for clients. This allows
27761 clients to download a much smaller amount of directory information.
27762 To disable it (and go back to the old-style consensus and
27763 descriptors), set "UseMicrodescriptors 0" in your torrc file.
27764 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
27765 "PortForwarding" config option), now supports Windows.
27766 - When using an exit relay running 0.2.3.x, clients can now
27767 "optimistically" send data before the exit relay reports that
27768 the stream has opened. This saves a round trip when starting
27769 connections where the client speaks first (such as web browsing).
27770 This behavior is controlled by a consensus parameter (currently
27771 disabled). To turn it on or off manually, use the "OptimisticData"
27772 torrc option. Implements proposal 181; code by Ian Goldberg.
27774 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
27775 - When using IOCP on Windows, we need to enable Libevent windows
27777 - The IOCP backend now works even when the user has not specified
27778 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
27779 Fixes part of bug 3752.
27780 - Correctly record the bytes we've read and written when using
27781 bufferevents, so that we can include them in our bandwidth history
27782 and advertised bandwidth. Fixes bug 3803.
27783 - Apply rate-limiting only at the bottom of a chain of filtering
27784 bufferevents. This prevents us from filling up internal read
27785 buffers and violating rate-limits when filtering bufferevents
27786 are enabled. Fixes part of bug 3804.
27787 - Add high-watermarks to the output buffers for filtered
27788 bufferevents. This prevents us from filling up internal write
27789 buffers and wasting CPU cycles when filtering bufferevents are
27790 enabled. Fixes part of bug 3804.
27791 - Correctly notice when data has been written from a bufferevent
27792 without flushing it completely. Fixes bug 3805.
27793 - Fix a bug where server-side tunneled bufferevent-based directory
27794 streams would get closed prematurely. Fixes bug 3814.
27795 - Fix a use-after-free error with per-connection rate-limiting
27796 buckets. Fixes bug 3888.
27798 o Major bugfixes (also part of 0.2.2.31-rc):
27799 - If we're configured to write our ControlPorts to disk, only write
27800 them after switching UID and creating the data directory. This way,
27801 we don't fail when starting up with a nonexistent DataDirectory
27802 and a ControlPortWriteToFile setting based on that directory. Fixes
27803 bug 3747; bugfix on Tor 0.2.2.26-beta.
27806 - Added a new CONF_CHANGED event so that controllers can be notified
27807 of any configuration changes made by other controllers, or by the
27808 user. Implements ticket 1692.
27809 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
27810 leak when using bufferevents, and lets Libevent worry about how to
27811 best copy data out of a buffer.
27812 - Replace files in stats/ rather than appending to them. Now that we
27813 include statistics in extra-info descriptors, it makes no sense to
27814 keep old statistics forever. Implements ticket 2930.
27816 o Minor features (build compatibility):
27817 - Limited, experimental support for building with nmake and MSVC.
27818 - Provide a substitute implementation of lround() for MSVC, which
27819 apparently lacks it. Patch from Gisle Vanem.
27821 o Minor features (also part of 0.2.2.31-rc):
27822 - Update to the August 2 2011 Maxmind GeoLite Country database.
27824 o Minor bugfixes (on 0.2.3.x-alpha):
27825 - Fix a spurious warning when parsing SOCKS requests with
27826 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
27827 - Get rid of a harmless warning that could happen on relays running
27828 with bufferevents. The warning was caused by someone doing an http
27829 request to a relay's orport. Also don't warn for a few related
27830 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
27832 o Minor bugfixes (on 2.2.x and earlier):
27833 - Correct the man page to explain that HashedControlPassword and
27834 CookieAuthentication can both be set, in which case either method
27835 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27836 when we decided to allow these config options to both be set. Issue
27837 raised by bug 3898.
27838 - The "--quiet" and "--hush" options now apply not only to Tor's
27839 behavior before logs are configured, but also to Tor's behavior in
27840 the absence of configured logs. Fixes bug 3550; bugfix on
27843 o Minor bugfixes (also part of 0.2.2.31-rc):
27844 - Write several files in text mode, on OSes that distinguish text
27845 mode from binary mode (namely, Windows). These files are:
27846 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27847 that collect those statistics; 'client_keys' and 'hostname' for
27848 hidden services that use authentication; and (in the tor-gencert
27849 utility) newly generated identity and signing keys. Previously,
27850 we wouldn't specify text mode or binary mode, leading to an
27851 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27852 the DirRecordUsageByCountry option which would have triggered
27853 the assertion failure was added), although this assertion failure
27854 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27855 - Selectively disable deprecation warnings on OS X because Lion
27856 started deprecating the shipped copy of openssl. Fixes bug 3643.
27857 - Remove an extra pair of quotation marks around the error
27858 message in control-port STATUS_GENERAL BUG events. Bugfix on
27859 0.1.2.6-alpha; fixes bug 3732.
27860 - When unable to format an address as a string, report its value
27861 as "???" rather than reusing the last formatted address. Bugfix
27864 o Code simplifications and refactoring:
27865 - Rewrite the listener-selection logic so that parsing which ports
27866 we want to listen on is now separate from binding to the ports
27870 - Building Tor with bufferevent support now requires Libevent
27871 2.0.13-stable or later. Previous versions of Libevent had bugs in
27872 SSL-related bufferevents and related issues that would make Tor
27873 work badly with bufferevents. Requiring 2.0.13-stable also allows
27874 Tor with bufferevents to take advantage of Libevent APIs
27875 introduced after 2.0.8-rc.
27878 Changes in version 0.2.2.32 - 2011-08-27
27879 The Tor 0.2.2 release series is dedicated to the memory of Andreas
27880 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
27881 a founder of the PETS community, a leader in our field, a mentor,
27882 and a friend. He left us with these words: "I had the possibility
27883 to contribute to this world that is not as it should be. I hope I
27884 could help in some areas to make the world a better place, and that
27885 I could also encourage other people to be engaged in improving the
27886 world. Please, stay engaged. This world needs you, your love, your
27887 initiative -- now I cannot be part of that anymore."
27889 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
27890 ready. More than two years in the making, this release features improved
27891 client performance and hidden service reliability, better compatibility
27892 for Android, correct behavior for bridges that listen on more than
27893 one address, more extensible and flexible directory object handling,
27894 better reporting of network statistics, improved code security, and
27895 many many other features and bugfixes.
27898 Changes in version 0.2.2.31-rc - 2011-08-17
27899 Tor 0.2.2.31-rc is the second and hopefully final release candidate
27900 for the Tor 0.2.2.x series.
27903 - Remove an extra pair of quotation marks around the error
27904 message in control-port STATUS_GENERAL BUG events. Bugfix on
27905 0.1.2.6-alpha; fixes bug 3732.
27906 - If we're configured to write our ControlPorts to disk, only write
27907 them after switching UID and creating the data directory. This way,
27908 we don't fail when starting up with a nonexistent DataDirectory
27909 and a ControlPortWriteToFile setting based on that directory. Fixes
27910 bug 3747; bugfix on Tor 0.2.2.26-beta.
27913 - Update to the August 2 2011 Maxmind GeoLite Country database.
27916 - Allow GETINFO fingerprint to return a fingerprint even when
27917 we have not yet built a router descriptor. Fixes bug 3577;
27918 bugfix on 0.2.0.1-alpha.
27919 - Write several files in text mode, on OSes that distinguish text
27920 mode from binary mode (namely, Windows). These files are:
27921 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27922 that collect those statistics; 'client_keys' and 'hostname' for
27923 hidden services that use authentication; and (in the tor-gencert
27924 utility) newly generated identity and signing keys. Previously,
27925 we wouldn't specify text mode or binary mode, leading to an
27926 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27927 the DirRecordUsageByCountry option which would have triggered
27928 the assertion failure was added), although this assertion failure
27929 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27930 - Selectively disable deprecation warnings on OS X because Lion
27931 started deprecating the shipped copy of openssl. Fixes bug 3643.
27932 - When unable to format an address as a string, report its value
27933 as "???" rather than reusing the last formatted address. Bugfix
27937 Changes in version 0.2.3.2-alpha - 2011-07-18
27938 Tor 0.2.3.2-alpha introduces two new experimental features:
27939 microdescriptors and pluggable transports. It also continues cleaning
27940 up a variety of recently introduced features.
27943 - Clients can now use microdescriptors instead of regular descriptors
27944 to build circuits. Microdescriptors are authority-generated
27945 summaries of regular descriptors' contents, designed to change
27946 very rarely (see proposal 158 for details). This feature is
27947 designed to save bandwidth, especially for clients on slow internet
27948 connections. It's off by default for now, since nearly no caches
27949 support it, but it will be on-by-default for clients in a future
27950 version. You can use the UseMicrodescriptors option to turn it on.
27951 - Tor clients using bridges can now be configured to use a separate
27952 'transport' proxy for each bridge. This approach helps to resist
27953 censorship by allowing bridges to use protocol obfuscation
27954 plugins. It implements part of proposal 180. Implements ticket 2841.
27955 - While we're trying to bootstrap, record how many TLS connections
27956 fail in each state, and report which states saw the most failures
27957 in response to any bootstrap failures. This feature may speed up
27958 diagnosis of censorship events. Implements ticket 3116.
27960 o Major bugfixes (on 0.2.3.1-alpha):
27961 - When configuring a large set of nodes in EntryNodes (as with
27962 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
27963 random subset to be guards, and choose them in random
27964 order. Fixes bug 2798.
27965 - Tor could crash when remembering a consensus in a non-used consensus
27966 flavor without having a current consensus set. Fixes bug 3361.
27967 - Comparing an unknown address to a microdescriptor's shortened exit
27968 policy would always give a "rejected" result. Fixes bug 3599.
27969 - Using microdescriptors as a client no longer prevents Tor from
27970 uploading and downloading hidden service descriptors. Fixes
27974 - Allow nameservers with IPv6 address. Resolves bug 2574.
27975 - Accept attempts to include a password authenticator in the
27976 handshake, as supported by SOCKS5. This handles SOCKS clients that
27977 don't know how to omit a password when authenticating. Resolves
27979 - When configuring a large set of nodes in EntryNodes, and there are
27980 enough of them listed as Guard so that we don't need to consider
27981 the non-guard entries, prefer the ones listed with the Guard flag.
27982 - Check for and recover from inconsistency in the microdescriptor
27983 cache. This will make it harder for us to accidentally free a
27984 microdescriptor without removing it from the appropriate data
27985 structures. Fixes issue 3135; issue noted by "wanoskarnet".
27986 - Log SSL state transitions at log level DEBUG, log domain
27987 HANDSHAKE. This can be useful for debugging censorship events.
27988 Implements ticket 3264.
27989 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
27990 implements ticket 3439.
27992 o Minor bugfixes (on 0.2.3.1-alpha):
27993 - Do not free all general-purpose regular descriptors just
27994 because microdescriptor use is enabled. Fixes bug 3113.
27995 - Correctly link libevent_openssl when --enable-static-libevent
27996 is passed to configure. Fixes bug 3118.
27997 - Bridges should not complain during their heartbeat log messages that
27998 they are unlisted in the consensus: that's more or less the point
27999 of being a bridge. Fixes bug 3183.
28000 - Report a SIGNAL event to controllers when acting on a delayed
28001 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
28002 event to the controller if we acted on a SIGNAL NEWNYM command
28003 immediately, and otherwise not report a SIGNAL event for the
28004 command at all. Fixes bug 3349.
28005 - Fix a crash when handling the SIGNAL controller command or
28006 reporting ERR-level status events with bufferevents enabled. Found
28007 by Robert Ransom. Fixes bug 3367.
28008 - Always ship the tor-fw-helper manpage in our release tarballs.
28009 Fixes bug 3389. Reported by Stephen Walker.
28010 - Fix a class of double-mark-for-close bugs when bufferevents
28011 are enabled. Fixes bug 3403.
28012 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
28013 - Add SIGNAL to the list returned by the 'GETINFO events/names'
28014 control-port command. Fixes part of bug 3465.
28015 - Prevent using negative indices during unit test runs when read_all()
28016 fails. Spotted by coverity.
28017 - Fix a rare memory leak when checking the nodelist without it being
28018 present. Found by coverity.
28019 - Only try to download a microdescriptor-flavored consensus from
28020 a directory cache that provides them.
28022 o Minor bugfixes (on 0.2.2.x and earlier):
28023 - Assert that hidden-service-related operations are not performed
28024 using single-hop circuits. Previously, Tor would assert that
28025 client-side streams are not attached to single-hop circuits,
28026 but not that other sensitive operations on the client and service
28027 side are not performed using single-hop circuits. Fixes bug 3332;
28029 - Don't publish a new relay descriptor when we reload our onion key,
28030 unless the onion key has actually changed. Fixes bug 3263 and
28031 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
28032 - Allow GETINFO fingerprint to return a fingerprint even when
28033 we have not yet built a router descriptor. Fixes bug 3577;
28034 bugfix on 0.2.0.1-alpha.
28035 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
28036 on 0.2.2.4-alpha; fixes bug 3427.
28038 o Code simplification and refactoring:
28039 - Use tor_sscanf() in place of scanf() in more places through the
28040 code. This makes us a little more locale-independent, and
28041 should help shut up code-analysis tools that can't tell
28042 a safe sscanf string from a dangerous one.
28043 - Use tt_assert(), not tor_assert(), for checking for test failures.
28044 This makes the unit tests more able to go on in the event that
28046 - Split connection_about_to_close() into separate functions for each
28050 - On Windows, we now define the _WIN32_WINNT macros only if they
28051 are not already defined. This lets the person building Tor decide,
28052 if they want, to require a later version of Windows.
28055 Changes in version 0.2.2.30-rc - 2011-07-07
28056 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
28057 series. It fixes a few smaller bugs, but generally appears stable.
28058 Please test it and let us know whether it is!
28061 - Send a SUCCEEDED stream event to the controller when a reverse
28062 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
28063 discovered by katmagic.
28064 - Always NUL-terminate the sun_path field of a sockaddr_un before
28065 passing it to the kernel. (Not a security issue: kernels are
28066 smart enough to reject bad sockaddr_uns.) Found by Coverity;
28067 CID #428. Bugfix on Tor 0.2.0.3-alpha.
28068 - Don't stack-allocate the list of supplementary GIDs when we're
28069 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
28070 could take up to 256K, which is way too much stack. Found by
28071 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
28072 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
28073 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
28074 fixes part of bug 3465.
28075 - Fix a memory leak when receiving a descriptor for a hidden
28076 service we didn't ask for. Found by Coverity; CID #30. Bugfix
28080 - Update to the July 1 2011 Maxmind GeoLite Country database.
28083 Changes in version 0.2.2.29-beta - 2011-06-20
28084 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
28085 have bridge lines in their torrc but don't want to use them; gets
28086 us closer to having the control socket feature working on Debian;
28087 and fixes a variety of smaller bugs.
28090 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
28091 When we changed the default behavior to "use bridges if any
28092 are listed in the torrc", we surprised users who had bridges
28093 in their torrc files but who didn't actually want to use them.
28094 Partial resolution for bug 3354.
28097 - Don't attach new streams to old rendezvous circuits after SIGNAL
28098 NEWNYM. Previously, we would keep using an existing rendezvous
28099 circuit if it remained open (i.e. if it were kept open by a
28100 long-lived stream, or if a new stream were attached to it before
28101 Tor could notice that it was old and no longer in use). Bugfix on
28102 0.1.1.15-rc; fixes bug 3375.
28105 - Fix a bug when using ControlSocketsGroupWritable with User. The
28106 directory's group would be checked against the current group, not
28107 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
28108 bugfix on 0.2.2.26-beta.
28109 - Make connection_printf_to_buf()'s behavior sane. Its callers
28110 expect it to emit a CRLF iff the format string ends with CRLF;
28111 it actually emitted a CRLF iff (a) the format string ended with
28112 CRLF or (b) the resulting string was over 1023 characters long or
28113 (c) the format string did not end with CRLF *and* the resulting
28114 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
28115 fixes part of bug 3407.
28116 - Make send_control_event_impl()'s behavior sane. Its callers
28117 expect it to always emit a CRLF at the end of the string; it
28118 might have emitted extra control characters as well. Bugfix on
28119 0.1.1.9-alpha; fixes another part of bug 3407.
28120 - Make crypto_rand_int() check the value of its input correctly.
28121 Previously, it accepted values up to UINT_MAX, but could return a
28122 negative number if given a value above INT_MAX+1. Found by George
28123 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
28124 - Avoid a segfault when reading a malformed circuit build state
28125 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
28127 - When asked about a DNS record type we don't support via a
28128 client DNSPort, reply with NOTIMPL rather than an empty
28129 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
28130 - Fix a rare memory leak during stats writing. Found by coverity.
28133 - Update to the June 1 2011 Maxmind GeoLite Country database.
28135 o Code simplifications and refactoring:
28136 - Remove some dead code as indicated by coverity.
28137 - Remove a few dead assignments during router parsing. Found by
28139 - Add some forgotten return value checks during unit tests. Found
28141 - Don't use 1-bit wide signed bit fields. Found by coverity.
28144 Changes in version 0.2.2.28-beta - 2011-06-04
28145 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
28146 fixed a big bug in whether relays stay in the consensus consistently,
28147 we moved closer to handling bridges and hidden services correctly,
28148 and we started the process of better handling the dreaded "my Vidalia
28149 died, and now my Tor demands a password when I try to reconnect to it"
28153 - Don't decide to make a new descriptor when receiving a HUP signal.
28154 This bug has caused a lot of 0.2.2.x relays to disappear from the
28155 consensus periodically. Fixes the most common case of triggering
28156 bug 1810; bugfix on 0.2.2.7-alpha.
28157 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
28158 - Don't try to build descriptors if "ORPort auto" is set and we
28159 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
28161 - Resolve a crash that occurred when setting BridgeRelay to 1 with
28162 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
28163 - Apply circuit timeouts to opened hidden-service-related circuits
28164 based on the correct start time. Previously, we would apply the
28165 circuit build timeout based on time since the circuit's creation;
28166 it was supposed to be applied based on time since the circuit
28167 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
28168 - Use the same circuit timeout for client-side introduction
28169 circuits as for other four-hop circuits, rather than the timeout
28170 for single-hop directory-fetch circuits; the shorter timeout may
28171 have been appropriate with the static circuit build timeout in
28172 0.2.1.x and earlier, but caused many hidden service access attempts
28173 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
28174 on 0.2.2.2-alpha; fixes another part of bug 1297.
28175 - In ticket 2511 we fixed a case where you could use an unconfigured
28176 bridge if you had configured it as a bridge the last time you ran
28177 Tor. Now fix another edge case: if you had configured it as a bridge
28178 but then switched to a different bridge via the controller, you
28179 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
28183 - Add an __OwningControllerProcess configuration option and a
28184 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
28185 that when it exits, Tor will shut down. Implements feature 3049.
28186 - If "UseBridges 1" is set and no bridges are configured, Tor will
28187 now refuse to build any circuits until some bridges are set.
28188 If "UseBridges auto" is set, Tor will use bridges if they are
28189 configured and we are not running as a server, but otherwise will
28190 make circuits as usual. The new default is "auto". Patch by anonym,
28191 so the Tails LiveCD can stop automatically revealing you as a Tor
28195 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
28196 - Remove a trailing asterisk from "exit-policy/default" in the
28197 output of the control port command "GETINFO info/names". Bugfix
28199 - Use a wide type to hold sockets when built for 64-bit Windows builds.
28201 - Warn when the user configures two HiddenServiceDir lines that point
28202 to the same directory. Bugfix on 0.0.6 (the version introducing
28203 HiddenServiceDir); fixes bug 3289.
28204 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
28205 part of bug 2748; bugfix on 0.2.0.10-alpha.
28206 - Log malformed requests for rendezvous descriptors as protocol
28207 warnings, not warnings. Also, use a more informative log message
28208 in case someone sees it at log level warning without prior
28209 info-level messages. Fixes the other part of bug 2748; bugfix
28211 - Clear the table recording the time of the last request for each
28212 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
28213 Previously, we would clear our HS descriptor cache on SIGNAL
28214 NEWNYM, but if we had previously retrieved a descriptor (or tried
28215 to) from every directory responsible for it, we would refuse to
28216 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
28218 - Fix a log message that said "bits" while displaying a value in
28219 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
28221 - When checking for 1024-bit keys, check for 1024 bits, not 128
28222 bytes. This allows Tor to correctly discard keys of length 1017
28223 through 1023. Bugfix on 0.0.9pre5.
28226 - Relays now log the reason for publishing a new relay descriptor,
28227 so we have a better chance of hunting down instances of bug 1810.
28228 Resolves ticket 3252.
28229 - Revise most log messages that refer to nodes by nickname to
28230 instead use the "$key=nickname at address" format. This should be
28231 more useful, especially since nicknames are less and less likely
28232 to be unique. Resolves ticket 3045.
28233 - Log (at info level) when purging pieces of hidden-service-client
28234 state because of SIGNAL NEWNYM.
28237 - Remove undocumented option "-F" from tor-resolve: it hasn't done
28238 anything since 0.2.1.16-rc.
28241 Changes in version 0.2.2.27-beta - 2011-05-18
28242 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
28243 release, and also adds a few more general bugfixes.
28246 - Fix a crash bug when changing bridges in a running Tor process.
28247 Fixes bug 3213; bugfix on 0.2.2.26-beta.
28248 - When the controller configures a new bridge, don't wait 10 to 60
28249 seconds before trying to fetch its descriptor. Bugfix on
28250 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
28253 - Require that onion keys have exponent 65537 in microdescriptors too.
28254 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
28255 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
28256 Changed the limit to 512 characters by removing base64 newlines.
28257 Fixes bug 2752. Fix by Michael Yakubovich.
28258 - When a client starts or stops using bridges, never use a circuit
28259 that was built before the configuration change. This behavior could
28260 put at risk a user who uses bridges to ensure that her traffic
28261 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
28265 Changes in version 0.2.2.26-beta - 2011-05-17
28266 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
28267 also introduces a new "socksport auto" approach that should make it
28268 easier to run multiple Tors on the same system, and does a lot of
28269 cleanup to get us closer to a release candidate.
28271 o Security/privacy fixes:
28272 - Replace all potentially sensitive memory comparison operations
28273 with versions whose runtime does not depend on the data being
28274 compared. This will help resist a class of attacks where an
28275 adversary can use variations in timing information to learn
28276 sensitive data. Fix for one case of bug 3122. (Safe memcmp
28277 implementation by Robert Ransom based partially on code by DJB.)
28278 - When receiving a hidden service descriptor, check that it is for
28279 the hidden service we wanted. Previously, Tor would store any
28280 hidden service descriptors that a directory gave it, whether it
28281 wanted them or not. This wouldn't have let an attacker impersonate
28282 a hidden service, but it did let directories pre-seed a client
28283 with descriptors that it didn't want. Bugfix on 0.0.6.
28284 - On SIGHUP, do not clear out all TrackHostExits mappings, client
28285 DNS cache entries, and virtual address mappings: that's what
28286 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
28289 - The options SocksPort, ControlPort, and so on now all accept a
28290 value "auto" that opens a socket on an OS-selected port. A
28291 new ControlPortWriteToFile option tells Tor to write its
28292 actual control port or ports to a chosen file. If the option
28293 ControlPortFileGroupReadable is set, the file is created as
28294 group-readable. Now users can run two Tor clients on the same
28295 system without needing to manually mess with parameters. Resolves
28296 part of ticket 3076.
28297 - Set SO_REUSEADDR on all sockets, not just listeners. This should
28298 help busy exit nodes avoid running out of useable ports just
28299 because all the ports have been used in the near past. Resolves
28303 - New "GETINFO net/listeners/(type)" controller command to return
28304 a list of addresses and ports that are bound for listeners for a
28305 given connection type. This is useful when the user has configured
28306 "SocksPort auto" and the controller needs to know which port got
28307 chosen. Resolves another part of ticket 3076.
28308 - Add a new ControlSocketsGroupWritable configuration option: when
28309 it is turned on, ControlSockets are group-writeable by the default
28310 group of the current user. Patch by Jérémy Bobbio; implements
28312 - Tor now refuses to create a ControlSocket in a directory that is
28313 world-readable (or group-readable if ControlSocketsGroupWritable
28314 is 0). This is necessary because some operating systems do not
28315 enforce permissions on an AF_UNIX sockets. Permissions on the
28316 directory holding the socket, however, seems to work everywhere.
28317 - Rate-limit a warning about failures to download v2 networkstatus
28318 documents. Resolves part of bug 1352.
28319 - Backport code from 0.2.3.x that allows directory authorities to
28320 clean their microdescriptor caches. Needed to resolve bug 2230.
28321 - When an HTTPS proxy reports "403 Forbidden", we now explain
28322 what it means rather than calling it an unexpected status code.
28323 Closes bug 2503. Patch from Michael Yakubovich.
28324 - Update to the May 1 2011 Maxmind GeoLite Country database.
28327 - Authorities now clean their microdesc cache periodically and when
28328 reading from disk initially, not only when adding new descriptors.
28329 This prevents a bug where we could lose microdescriptors. Bugfix
28330 on 0.2.2.6-alpha. Fixes bug 2230.
28331 - Do not crash when our configuration file becomes unreadable, for
28332 example due to a permissions change, between when we start up
28333 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28335 - Avoid a bug that would keep us from replacing a microdescriptor
28336 cache on Windows. (We would try to replace the file while still
28337 holding it open. That's fine on Unix, but Windows doesn't let us
28338 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28339 - Add missing explanations for the authority-related torrc options
28340 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28341 man page. Resolves issue 2379.
28342 - As an authority, do not upload our own vote or signature set to
28343 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28344 it would get flagged as a duplicate. Resolves bug 3026.
28345 - Accept hidden service descriptors if we think we might be a hidden
28346 service directory, regardless of what our consensus says. This
28347 helps robustness, since clients and hidden services can sometimes
28348 have a more up-to-date view of the network consensus than we do,
28349 and if they think that the directory authorities list us a HSDir,
28350 we might actually be one. Related to bug 2732; bugfix on
28352 - When a controller changes TrackHostExits, remove mappings for
28353 hosts that should no longer have their exits tracked. Bugfix on
28355 - When a controller changes VirtualAddrNetwork, remove any mappings
28356 for hosts that were automapped to the old network. Bugfix on
28358 - When a controller changes one of the AutomapHosts* options, remove
28359 any mappings for hosts that should no longer be automapped. Bugfix
28361 - Do not reset the bridge descriptor download status every time we
28362 re-parse our configuration or get a configuration change. Fixes
28363 bug 3019; bugfix on 0.2.0.3-alpha.
28365 o Minor bugfixes (code cleanup):
28366 - When loading the microdesc journal, remember its current size.
28367 In 0.2.2, this helps prevent the microdesc journal from growing
28368 without limit on authorities (who are the only ones to use it in
28369 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28370 Fix posted by "cypherpunks."
28371 - The microdesc journal is supposed to get rebuilt only if it is
28372 at least _half_ the length of the store, not _twice_ the length
28373 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28374 - Fix a potential null-pointer dereference while computing a
28375 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
28377 - Avoid a possible null-pointer dereference when rebuilding the mdesc
28378 cache without actually having any descriptors to cache. Bugfix on
28379 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
28380 - If we fail to compute the identity digest of a v3 legacy keypair,
28381 warn, and don't use a buffer-full of junk instead. Bugfix on
28382 0.2.1.1-alpha; fixes bug 3106.
28383 - Resolve an untriggerable issue in smartlist_string_num_isin(),
28384 where if the function had ever in the future been used to check
28385 for the presence of a too-large number, it would have given an
28386 incorrect result. (Fortunately, we only used it for 16-bit
28387 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
28388 - Require that introduction point keys and onion handshake keys
28389 have a public exponent of 65537. Starts to fix bug 3207; bugfix
28392 o Removed features:
28393 - Caches no longer download and serve v2 networkstatus documents
28394 unless FetchV2Networkstatus flag is set: these documents haven't
28395 haven't been used by clients or relays since 0.2.0.x. Resolves
28399 Changes in version 0.2.3.1-alpha - 2011-05-05
28400 Tor 0.2.3.1-alpha adds some new experimental features, including support
28401 for an improved network IO backend, IOCP networking on Windows,
28402 microdescriptor caching, "fast-start" support for streams, and automatic
28403 home router configuration. There are also numerous internal improvements
28404 to try to make the code easier for developers to work with.
28406 This is the first alpha release in a new series, so expect there to be
28407 bugs. Users who would rather test out a more stable branch should
28408 stay with 0.2.2.x for now.
28411 - Tor can now optionally build with the "bufferevents" buffered IO
28412 backend provided by Libevent 2. To use this feature, make sure you
28413 have the latest possible version of Libevent, and pass the
28414 --enable-bufferevents flag to configure when building Tor from
28415 source. This feature will make our networking code more flexible,
28416 let us stack layers on each other, and let us use more efficient
28417 zero-copy transports where available.
28418 - As an experimental feature, Tor can use IOCP for networking on Windows.
28419 Once this code is tuned and optimized, it promises much better
28420 performance than the select-based backend we've used in the past. To
28421 try this feature, you must build Tor with Libevent 2, configure Tor
28422 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
28423 your torrc. There are known bugs here: only try this if you can help
28424 debug it as it breaks.
28425 - The EntryNodes option can now include country codes like {de} or IP
28426 addresses or network masks. Previously we had disallowed these options
28427 because we didn't have an efficient way to keep the list up to
28428 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
28429 - Exit nodes now accept and queue data on not-yet-connected streams.
28430 Previously, the client wasn't allowed to send data until the stream was
28431 connected, which slowed down all connections. This change will enable
28432 clients to perform a "fast-start" on streams and send data without
28433 having to wait for a confirmation that the stream has opened. (Patch
28434 from Ian Goldberg; implements the server side of Proposal 174.)
28435 - Tor now has initial support for automatic port mapping on the many
28436 home routers that support NAT-PMP or UPnP. (Not yet supported on
28437 Windows). To build the support code, you'll need to have libnatpnp
28438 library and/or the libminiupnpc library, and you'll need to enable the
28439 feature specifically by passing "--enable-upnp" and/or
28440 "--enable-natpnp" to configure. To turn it on, use the new
28441 PortForwarding option.
28442 - Caches now download, cache, and serve multiple "flavors" of the
28443 consensus, including a flavor that describes microdescriptors.
28444 - Caches now download, cache, and serve microdescriptors -- small
28445 summaries of router descriptors that are authenticated by all of the
28446 directory authorities. Once enough caches are running this code,
28447 clients will be able to save significant amounts of directory bandwidth
28448 by downloading microdescriptors instead of router descriptors.
28451 - Make logging resolution configurable with a new LogTimeGranularity
28452 option, and change the default from 1 millisecond to 1 second.
28453 Implements enhancement 1668.
28454 - We log which torrc file we're using on startup. Implements ticket
28456 - Ordinarily, Tor does not count traffic from private addresses (like
28457 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
28458 There is now a new option, CountPrivateBandwidth, to disable this
28459 behavior. Patch from Daniel Cagara.
28460 - New --enable-static-tor configure option for building Tor as
28461 statically as possible. Idea, general hackery and thoughts from
28462 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
28464 - If you set the NumCPUs option to 0, Tor will now try to detect how
28465 many CPUs you have. This is the new default behavior.
28466 - Turn on directory request statistics by default and include them in
28467 extra-info descriptors. Don't break if we have no GeoIP database.
28468 - Relays that set "ConnDirectionStatistics 1" write statistics on the
28469 bidirectional use of connections to disk every 24 hours.
28470 - Add a GeoIP file digest to the extra-info descriptor. Implements
28472 - The NodeFamily option -- which let you declare that you want to
28473 consider nodes to be part of a family whether they list themselves
28474 that way or not -- now allows IP address ranges and country codes.
28475 - Add a new 'Heartbeat' log message type to periodically log a message
28476 describing Tor's status at level Notice. This feature is meant for
28477 operators who log at notice, and want to make sure that their Tor
28478 server is still working. Implementation by George Kadianakis.
28480 o Minor bugfixes (on 0.2.2.25-alpha):
28481 - When loading the microdesc journal, remember its current size.
28482 In 0.2.2, this helps prevent the microdesc journal from growing
28483 without limit on authorities (who are the only ones to use it in
28484 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28485 Fix posted by "cypherpunks."
28486 - The microdesc journal is supposed to get rebuilt only if it is
28487 at least _half_ the length of the store, not _twice_ the length
28488 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28489 - If as an authority we fail to compute the identity digest of a v3
28490 legacy keypair, warn, and don't use a buffer-full of junk instead.
28491 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
28492 - Authorities now clean their microdesc cache periodically and when
28493 reading from disk initially, not only when adding new descriptors.
28494 This prevents a bug where we could lose microdescriptors. Bugfix
28497 o Minor features (controller):
28498 - Add a new SIGNAL event to the controller interface so that
28499 controllers can be notified when Tor handles a signal. Resolves
28500 issue 1955. Patch by John Brooks.
28501 - Add a new GETINFO option to get total bytes read and written. Patch
28502 from pipe, revised by atagar. Resolves ticket 2345.
28503 - Implement some GETINFO controller fields to provide information about
28504 the Tor process's pid, euid, username, and resource limits.
28507 - Our build system requires automake 1.6 or later to create the
28508 Makefile.in files. Previously, you could have used 1.4.
28509 This only affects developers and people building Tor from git;
28510 people who build Tor from the source distribution without changing
28511 the Makefile.am files should be fine.
28512 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
28513 so on. This is more robust against some of the failure modes
28514 associated with running the autotools pieces on their own.
28516 o Minor packaging issues:
28517 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
28518 already created. Patch from Andreas Stieger. Fixes bug 2573.
28520 o Code simplifications and refactoring:
28521 - A major revision to our internal node-selecting and listing logic.
28522 Tor already had at least two major ways to look at the question of
28523 "which Tor servers do we know about": a list of router descriptors,
28524 and a list of entries in the current consensus. With
28525 microdescriptors, we're adding a third. Having so many systems
28526 without an abstraction layer over them was hurting the codebase.
28527 Now, we have a new "node_t" abstraction that presents a consistent
28528 interface to a client's view of a Tor node, and holds (nearly) all
28529 of the mutable state formerly in routerinfo_t and routerstatus_t.
28530 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
28531 no longer link against Libevent: they never used it, but
28532 our library structure used to force them to link it.
28534 o Removed features:
28535 - Remove some old code to work around even older versions of Tor that
28536 used forked processes to handle DNS requests. Such versions of Tor
28537 are no longer in use as servers.
28539 o Documentation fixes:
28540 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
28541 - Add missing documentation for the authority-related torrc options
28542 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
28546 Changes in version 0.2.2.25-alpha - 2011-04-29
28547 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
28548 robust, routers no longer overreport their bandwidth, Win7 should crash
28549 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
28550 now prevents hidden service-related activity from being linkable. It
28551 provides more information to Vidalia so you can see if your bridge is
28552 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
28553 StrictNodes configuration options to make them more reliable, more
28554 understandable, and more regularly applied. If you use those options,
28555 please see the revised documentation for them in the manual page.
28558 - Relays were publishing grossly inflated bandwidth values because
28559 they were writing their state files wrong--now they write the
28560 correct value. Also, resume reading bandwidth history from the
28561 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
28562 - Improve hidden service robustness: When we find that we have
28563 extended a hidden service's introduction circuit to a relay not
28564 listed as an introduction point in the HS descriptor we currently
28565 have, retry with an introduction point from the current
28566 descriptor. Previously we would just give up. Fixes bugs 1024 and
28567 1930; bugfix on 0.2.0.10-alpha.
28568 - Clients now stop trying to use an exit node associated with a given
28569 destination by TrackHostExits if they fail to reach that exit node.
28570 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
28571 - Fix crash bug on platforms where gmtime and localtime can return
28572 NULL. Windows 7 users were running into this one. Fixes part of bug
28573 2077. Bugfix on all versions of Tor. Found by boboper.
28575 o Security and stability fixes:
28576 - Don't double-free a parsable, but invalid, microdescriptor, even if
28577 it is followed in the blob we're parsing by an unparsable
28578 microdescriptor. Fixes an issue reported in a comment on bug 2954.
28579 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
28580 - If the Nickname configuration option isn't given, Tor would pick a
28581 nickname based on the local hostname as the nickname for a relay.
28582 Because nicknames are not very important in today's Tor and the
28583 "Unnamed" nickname has been implemented, this is now problematic
28584 behavior: It leaks information about the hostname without being
28585 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
28586 introduced the Unnamed nickname. Reported by tagnaq.
28587 - Fix an uncommon assertion failure when running with DNSPort under
28588 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28589 - Avoid linkability based on cached hidden service descriptors: forget
28590 all hidden service descriptors cached as a client when processing a
28591 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28594 - Export GeoIP information on bridge usage to controllers even if we
28595 have not yet been running for 24 hours. Now Vidalia bridge operators
28596 can get more accurate and immediate feedback about their
28597 contributions to the network.
28599 o Major features and bugfixes (node selection):
28600 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
28601 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
28602 options. Previously, we had been ambiguous in describing what
28603 counted as an "exit" node, and what operations exactly "StrictNodes
28604 0" would permit. This created confusion when people saw nodes built
28605 through unexpected circuits, and made it hard to tell real bugs from
28606 surprises. Now the intended behavior is:
28607 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
28608 a node that delivers user traffic outside the Tor network.
28609 . "Entry", in the context of EntryNodes, means a node used as the
28610 first hop of a multihop circuit. It doesn't include direct
28611 connections to directory servers.
28612 . "ExcludeNodes" applies to all nodes.
28613 . "StrictNodes" changes the behavior of ExcludeNodes only. When
28614 StrictNodes is set, Tor should avoid all nodes listed in
28615 ExcludeNodes, even when it will make user requests fail. When
28616 StrictNodes is *not* set, then Tor should follow ExcludeNodes
28617 whenever it can, except when it must use an excluded node to
28618 perform self-tests, connect to a hidden service, provide a
28619 hidden service, fulfill a .exit request, upload directory
28620 information, or fetch directory information.
28621 Collectively, the changes to implement the behavior fix bug 1090.
28622 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
28623 a node is listed in both, it's treated as excluded.
28624 - ExcludeNodes now applies to directory nodes -- as a preference if
28625 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
28626 Don't exclude all the directory authorities and set StrictNodes to 1
28627 unless you really want your Tor to break.
28628 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
28629 - ExcludeExitNodes now overrides .exit requests.
28630 - We don't use bridges listed in ExcludeNodes.
28631 - When StrictNodes is 1:
28632 . We now apply ExcludeNodes to hidden service introduction points
28633 and to rendezvous points selected by hidden service users. This
28634 can make your hidden service less reliable: use it with caution!
28635 . If we have used ExcludeNodes on ourself, do not try relay
28636 reachability self-tests.
28637 . If we have excluded all the directory authorities, we will not
28638 even try to upload our descriptor if we're a relay.
28639 . Do not honor .exit requests to an excluded node.
28640 - Remove a misfeature that caused us to ignore the Fast/Stable flags
28641 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
28642 - When the set of permitted nodes changes, we now remove any mappings
28643 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
28645 - We never cannibalize a circuit that had excluded nodes on it, even
28646 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
28647 - Revert a change where we would be laxer about attaching streams to
28648 circuits than when building the circuits. This was meant to prevent
28649 a set of bugs where streams were never attachable, but our improved
28650 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
28651 - Keep track of how many times we launch a new circuit to handle a
28652 given stream. Too many launches could indicate an inconsistency
28653 between our "launch a circuit to handle this stream" logic and our
28654 "attach this stream to one of the available circuits" logic.
28655 - Improve log messages related to excluded nodes.
28658 - Fix a spurious warning when moving from a short month to a long
28659 month on relays with month-based BandwidthAccounting. Bugfix on
28660 0.2.2.17-alpha; fixes bug 3020.
28661 - When a client finds that an origin circuit has run out of 16-bit
28662 stream IDs, we now mark it as unusable for new streams. Previously,
28663 we would try to close the entire circuit. Bugfix on 0.0.6.
28664 - Add a forgotten cast that caused a compile warning on OS X 10.6.
28665 Bugfix on 0.2.2.24-alpha.
28666 - Be more careful about reporting the correct error from a failed
28667 connect() system call. Under some circumstances, it was possible to
28668 look at an incorrect value for errno when sending the end reason.
28669 Bugfix on 0.1.0.1-rc.
28670 - Correctly handle an "impossible" overflow cases in connection byte
28671 counting, where we write or read more than 4GB on an edge connection
28672 in a single second. Bugfix on 0.1.2.8-beta.
28673 - Correct the warning displayed when a rendezvous descriptor exceeds
28674 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28676 - Clients and hidden services now use HSDir-flagged relays for hidden
28677 service descriptor downloads and uploads even if the relays have no
28678 DirPort set and the client has disabled TunnelDirConns. This will
28679 eventually allow us to give the HSDir flag to relays with no
28680 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
28681 - Downgrade "no current certificates known for authority" message from
28682 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
28683 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
28684 2917. Bugfix on 0.1.1.1-alpha.
28685 - Only limit the lengths of single HS descriptors, even when multiple
28686 HS descriptors are published to an HSDir relay in a single POST
28687 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
28688 - Write the current time into the LastWritten line in our state file,
28689 rather than the time from the previous write attempt. Also, stop
28690 trying to use a time of -1 in our log statements. Fixes bug 3039;
28691 bugfix on 0.2.2.14-alpha.
28692 - Be more consistent in our treatment of file system paths. "~" should
28693 get expanded to the user's home directory in the Log config option.
28694 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
28695 feature for the -f and --DataDirectory options.
28698 - Make sure every relay writes a state file at least every 12 hours.
28699 Previously, a relay could go for weeks without writing its state
28700 file, and on a crash could lose its bandwidth history, capacity
28701 estimates, client country statistics, and so on. Addresses bug 3012.
28702 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
28703 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
28704 clients are already deprecated because of security bugs.
28705 - Don't allow v0 hidden service authorities to act as clients.
28706 Required by fix for bug 3000.
28707 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
28708 by fix for bug 3000.
28709 - Ensure that no empty [dirreq-](read|write)-history lines are added
28710 to an extrainfo document. Implements ticket 2497.
28712 o Code simplification and refactoring:
28713 - Remove workaround code to handle directory responses from servers
28714 that had bug 539 (they would send HTTP status 503 responses _and_
28715 send a body too). Since only server versions before
28716 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
28717 keep the workaround in place.
28718 - Remove the old 'fuzzy time' logic. It was supposed to be used for
28719 handling calculations where we have a known amount of clock skew and
28720 an allowed amount of unknown skew. But we only used it in three
28721 places, and we never adjusted the known/unknown skew values. This is
28722 still something we might want to do someday, but if we do, we'll
28723 want to do it differently.
28724 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
28725 None of the cases where we did this before were wrong, but by making
28726 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
28727 - Use GetTempDir to find the proper temporary directory location on
28728 Windows when generating temporary files for the unit tests. Patch by
28732 Changes in version 0.2.2.24-alpha - 2011-04-08
28733 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
28734 prevented Tor clients from effectively using "multihomed" bridges,
28735 that is, bridges that listen on multiple ports or IP addresses so users
28736 can continue to use some of their addresses even if others get blocked.
28739 - Fix a bug where bridge users who configure the non-canonical
28740 address of a bridge automatically switch to its canonical
28741 address. If a bridge listens at more than one address, it should be
28742 able to advertise those addresses independently and any non-blocked
28743 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
28745 - If you configured Tor to use bridge A, and then quit and
28746 configured Tor to use bridge B instead, it would happily continue
28747 to use bridge A if it's still reachable. While this behavior is
28748 a feature if your goal is connectivity, in some scenarios it's a
28749 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
28750 - Directory authorities now use data collected from their own
28751 uptime observations when choosing whether to assign the HSDir flag
28752 to relays, instead of trusting the uptime value the relay reports in
28753 its descriptor. This change helps prevent an attack where a small
28754 set of nodes with frequently-changing identity keys can blackhole
28755 a hidden service. (Only authorities need upgrade; others will be
28756 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
28759 - When we restart our relay, we might get a successful connection
28760 from the outside before we've started our reachability tests,
28761 triggering a warning: "ORPort found reachable, but I have no
28762 routerinfo yet. Failing to inform controller of success." This
28763 bug was harmless unless Tor is running under a controller
28764 like Vidalia, in which case the controller would never get a
28765 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
28767 - Make directory authorities more accurate at recording when
28768 relays that have failed several reachability tests became
28769 unreachable, so we can provide more accuracy at assigning Stable,
28770 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
28771 - Fix an issue that prevented static linking of libevent on
28772 some platforms (notably Linux). Fixes bug 2698; bugfix on
28773 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
28774 the --with-static-libevent configure option).
28775 - We now ask the other side of a stream (the client or the exit)
28776 for more data on that stream when the amount of queued data on
28777 that stream dips low enough. Previously, we wouldn't ask the
28778 other side for more data until either it sent us more data (which
28779 it wasn't supposed to do if it had exhausted its window!) or we
28780 had completely flushed all our queued data. This flow control fix
28781 should improve throughput. Fixes bug 2756; bugfix on the earliest
28782 released versions of Tor (svn commit r152).
28783 - Avoid a double-mark-for-free warning when failing to attach a
28784 transparent proxy connection. (We thought we had fixed this in
28785 0.2.2.23-alpha, but it turns out our fix was checking the wrong
28786 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
28787 bug) and 0.2.2.23-alpha (the incorrect fix).
28788 - When warning about missing zlib development packages during compile,
28789 give the correct package names. Bugfix on 0.2.0.1-alpha.
28792 - Directory authorities now log the source of a rejected POSTed v3
28793 networkstatus vote.
28794 - Make compilation with clang possible when using
28795 --enable-gcc-warnings by removing two warning options that clang
28796 hasn't implemented yet and by fixing a few warnings. Implements
28798 - When expiring circuits, use microsecond timers rather than
28799 one-second timers. This can avoid an unpleasant situation where a
28800 circuit is launched near the end of one second and expired right
28801 near the beginning of the next, and prevent fluctuations in circuit
28803 - Use computed circuit-build timeouts to decide when to launch
28804 parallel introduction circuits for hidden services. (Previously,
28805 we would retry after 15 seconds.)
28806 - Update to the April 1 2011 Maxmind GeoLite Country database.
28809 - Create the /var/run/tor directory on startup on OpenSUSE if it is
28810 not already created. Patch from Andreas Stieger. Fixes bug 2573.
28812 o Documentation changes:
28813 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
28814 - Resolve all doxygen warnings except those for missing documentation.
28816 - Add doxygen documentation for more functions, fields, and types.
28819 Changes in version 0.2.2.23-alpha - 2011-03-08
28820 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
28821 they restart they don't lose their bandwidth capacity estimate. This
28822 release also fixes a diverse set of user-facing bugs, ranging from
28823 relays overrunning their rate limiting to clients falsely warning about
28824 clock skew to bridge descriptor leaks by our bridge directory authority.
28827 - Stop sending a CLOCK_SKEW controller status event whenever
28828 we fetch directory information from a relay that has a wrong clock.
28829 Instead, only inform the controller when it's a trusted authority
28830 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28831 the rest of bug 1074.
28832 - Fix an assert in parsing router descriptors containing IPv6
28833 addresses. This one took down the directory authorities when
28834 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
28835 - Make the bridge directory authority refuse to answer directory
28836 requests for "all" descriptors. It used to include bridge
28837 descriptors in its answer, which was a major information leak.
28838 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
28839 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28840 Tor would ignore their RelayBandwidthBurst setting,
28841 potentially using more bandwidth than expected. Bugfix on
28842 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28843 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28844 hidserv" in her torrc. The 'hidserv' argument never controlled
28845 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28848 - Relays now save observed peak bandwidth throughput rates to their
28849 state file (along with total usage, which was already saved)
28850 so that they can determine their correct estimated bandwidth on
28851 restart. Resolves bug 1863, where Tor relays would reset their
28852 estimated bandwidth to 0 after restarting.
28853 - Directory authorities now take changes in router IP address and
28854 ORPort into account when determining router stability. Previously,
28855 if a router changed its IP or ORPort, the authorities would not
28856 treat it as having any downtime for the purposes of stability
28857 calculation, whereas clients would experience downtime since the
28858 change could take a while to propagate to them. Resolves issue 1035.
28859 - Enable Address Space Layout Randomization (ASLR) and Data Execution
28860 Prevention (DEP) by default on Windows to make it harder for
28861 attackers to exploit vulnerabilities. Patch from John Brooks.
28863 o Minor bugfixes (on 0.2.1.x and earlier):
28864 - Fix a rare crash bug that could occur when a client was configured
28865 with a large number of bridges. Fixes bug 2629; bugfix on
28866 0.2.1.2-alpha. Bugfix by trac user "shitlei".
28867 - Avoid a double mark-for-free warning when failing to attach a
28868 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
28870 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
28871 found by "cypherpunks". This bug was introduced before the first
28872 Tor release, in svn commit r110.
28873 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
28874 don't mention them in the manpage. Fixes bug 2450; issue
28875 spotted by keb and G-Lo.
28876 - Fix a bug in bandwidth history state parsing that could have been
28877 triggered if a future version of Tor ever changed the timing
28878 granularity at which bandwidth history is measured. Bugfix on
28879 Tor 0.1.1.11-alpha.
28880 - When a relay decides that its DNS is too broken for it to serve
28881 as an exit server, it advertised itself as a non-exit, but
28882 continued to act as an exit. This could create accidental
28883 partitioning opportunities for users. Instead, if a relay is
28884 going to advertise reject *:* as its exit policy, it should
28885 really act with exit policy "reject *:*". Fixes bug 2366.
28886 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
28887 - In the special case where you configure a public exit relay as your
28888 bridge, Tor would be willing to use that exit relay as the last
28889 hop in your circuit as well. Now we fail that circuit instead.
28890 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
28891 - Fix a bug with our locking implementation on Windows that couldn't
28892 correctly detect when a file was already locked. Fixes bug 2504,
28893 bugfix on 0.2.1.6-alpha.
28894 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
28895 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
28897 - Set target port in get_interface_address6() correctly. Bugfix
28898 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
28899 - Directory authorities are now more robust to hops back in time
28900 when calculating router stability. Previously, if a run of uptime
28901 or downtime appeared to be negative, the calculation could give
28902 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
28904 - Fix an assert that got triggered when using the TestingTorNetwork
28905 configuration option and then issuing a GETINFO config-text control
28906 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
28908 o Minor bugfixes (on 0.2.2.x):
28909 - Clients should not weight BadExit nodes as Exits in their node
28910 selection. Similarly, directory authorities should not count BadExit
28911 bandwidth as Exit bandwidth when computing bandwidth-weights.
28912 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
28913 - Correctly clear our dir_read/dir_write history when there is an
28914 error parsing any bw history value from the state file. Bugfix on
28915 Tor 0.2.2.15-alpha.
28916 - Resolve a bug in verifying signatures of directory objects
28917 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
28918 Fixes bug 2409. Found by "piebeer".
28919 - Bridge authorities no longer crash on SIGHUP when they try to
28920 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
28924 - Log less aggressively about circuit timeout changes, and improve
28925 some other circuit timeout messages. Resolves bug 2004.
28926 - Log a little more clearly about the times at which we're no longer
28927 accepting new connections. Resolves bug 2181.
28928 - Reject attempts at the client side to open connections to private
28929 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
28930 a randomly chosen exit node. Attempts to do so are always
28931 ill-defined, generally prevented by exit policies, and usually
28932 in error. This will also help to detect loops in transparent
28933 proxy configurations. You can disable this feature by setting
28934 "ClientRejectInternalAddresses 0" in your torrc.
28935 - Always treat failure to allocate an RSA key as an unrecoverable
28937 - Update to the March 1 2011 Maxmind GeoLite Country database.
28939 o Minor features (log subsystem):
28940 - Add documentation for configuring logging at different severities in
28941 different log domains. We've had this feature since 0.2.1.1-alpha,
28942 but for some reason it never made it into the manpage. Fixes
28944 - Make it simpler to specify "All log domains except for A and B".
28945 Previously you needed to say "[*,~A,~B]". Now you can just say
28947 - Add a "LogMessageDomains 1" option to include the domains of log
28948 messages along with the messages. Without this, there's no way
28949 to use log domains without reading the source or doing a lot
28952 o Packaging changes:
28953 - Stop shipping the Tor specs files and development proposal documents
28954 in the tarball. They are now in a separate git repository at
28955 git://git.torproject.org/torspec.git
28958 Changes in version 0.2.1.30 - 2011-02-23
28959 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
28960 change is a slight tweak to Tor's TLS handshake that makes relays
28961 and bridges that run this new version reachable from Iran again.
28962 We don't expect this tweak will win the arms race long-term, but it
28963 buys us time until we roll out a better solution.
28966 - Stop sending a CLOCK_SKEW controller status event whenever
28967 we fetch directory information from a relay that has a wrong clock.
28968 Instead, only inform the controller when it's a trusted authority
28969 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28970 the rest of bug 1074.
28971 - Fix a bounds-checking error that could allow an attacker to
28972 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
28973 Found by "piebeer".
28974 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28975 Tor would ignore their RelayBandwidthBurst setting,
28976 potentially using more bandwidth than expected. Bugfix on
28977 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28978 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28979 hidserv" in her torrc. The 'hidserv' argument never controlled
28980 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28983 - Adjust our TLS Diffie-Hellman parameters to match those used by
28985 - Update to the February 1 2011 Maxmind GeoLite Country database.
28988 - Check for and reject overly long directory certificates and
28989 directory tokens before they have a chance to hit any assertions.
28990 Bugfix on 0.2.1.28. Found by "doorss".
28991 - Bring the logic that gathers routerinfos and assesses the
28992 acceptability of circuits into line. This prevents a Tor OP from
28993 getting locked in a cycle of choosing its local OR as an exit for a
28994 path (due to a .exit request) and then rejecting the circuit because
28995 its OR is not listed yet. It also prevents Tor clients from using an
28996 OR running in the same instance as an exit (due to a .exit request)
28997 if the OR does not meet the same requirements expected of an OR
28998 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29000 o Packaging changes:
29001 - Stop shipping the Tor specs files and development proposal documents
29002 in the tarball. They are now in a separate git repository at
29003 git://git.torproject.org/torspec.git
29004 - Do not include Git version tags as though they are SVN tags when
29005 generating a tarball from inside a repository that has switched
29006 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
29009 Changes in version 0.2.2.22-alpha - 2011-01-25
29010 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
29011 main other change is a slight tweak to Tor's TLS handshake that makes
29012 relays and bridges that run this new version reachable from Iran again.
29013 We don't expect this tweak will win the arms race long-term, but it
29014 will buy us a bit more time until we roll out a better solution.
29017 - Fix a bounds-checking error that could allow an attacker to
29018 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
29019 Found by "piebeer".
29020 - Don't assert when changing from bridge to relay or vice versa
29021 via the controller. The assert happened because we didn't properly
29022 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
29023 bug 2433. Reported by bastik.
29026 - Adjust our TLS Diffie-Hellman parameters to match those used by
29028 - Provide a log message stating which geoip file we're parsing
29029 instead of just stating that we're parsing the geoip file.
29030 Implements ticket 2432.
29033 - Check for and reject overly long directory certificates and
29034 directory tokens before they have a chance to hit any assertions.
29035 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
29038 Changes in version 0.2.2.21-alpha - 2011-01-15
29039 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
29040 continues our recent code security audit work. The main fix resolves
29041 a remote heap overflow vulnerability that can allow remote code
29042 execution (CVE-2011-0427). Other fixes address a variety of assert
29043 and crash bugs, most of which we think are hard to exploit remotely.
29045 o Major bugfixes (security), also included in 0.2.1.29:
29046 - Fix a heap overflow bug where an adversary could cause heap
29047 corruption. This bug probably allows remote code execution
29048 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29050 - Prevent a denial-of-service attack by disallowing any
29051 zlib-compressed data whose compression factor is implausibly
29052 high. Fixes part of bug 2324; reported by "doorss".
29053 - Zero out a few more keys in memory before freeing them. Fixes
29054 bug 2384 and part of bug 2385. These key instances found by
29055 "cypherpunks", based on Andrew Case's report about being able
29056 to find sensitive data in Tor's memory space if you have enough
29057 permissions. Bugfix on 0.0.2pre9.
29059 o Major bugfixes (crashes), also included in 0.2.1.29:
29060 - Prevent calls to Libevent from inside Libevent log handlers.
29061 This had potential to cause a nasty set of crashes, especially
29062 if running Libevent with debug logging enabled, and running
29063 Tor with a controller watching for low-severity log messages.
29064 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29065 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29066 underflow errors there too. Fixes the other part of bug 2324.
29067 - Fix a bug where we would assert if we ever had a
29068 cached-descriptors.new file (or another file read directly into
29069 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29070 on 0.2.1.25. Found by doorss.
29071 - Fix some potential asserts and parsing issues with grossly
29072 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29075 o Minor bugfixes (other), also included in 0.2.1.29:
29076 - Fix a bug with handling misformed replies to reverse DNS lookup
29077 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29078 bug reported by doorss.
29079 - Fix compilation on mingw when a pthreads compatibility library
29080 has been installed. (We don't want to use it, so we shouldn't
29081 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29082 - Fix a bug where we would declare that we had run out of virtual
29083 addresses when the address space was only half-exhausted. Bugfix
29085 - Correctly handle the case where AutomapHostsOnResolve is set but
29086 no virtual addresses are available. Fixes bug 2328; bugfix on
29087 0.1.2.1-alpha. Bug found by doorss.
29088 - Correctly handle wrapping around when we run out of virtual
29089 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
29091 o Minor features, also included in 0.2.1.29:
29092 - Update to the January 1 2011 Maxmind GeoLite Country database.
29093 - Introduce output size checks on all of our decryption functions.
29095 o Build changes, also included in 0.2.1.29:
29096 - Tor does not build packages correctly with Automake 1.6 and earlier;
29097 added a check to Makefile.am to make sure that we're building with
29098 Automake 1.7 or later.
29099 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29100 because we built it with a too-old version of automake. Thus that
29101 release broke ./configure --enable-openbsd-malloc, which is popular
29102 among really fast exit relays on Linux.
29104 o Major bugfixes, new in 0.2.2.21-alpha:
29105 - Prevent crash/heap corruption when the cbtnummodes consensus
29106 parameter is set to 0 or large values. Fixes bug 2317; bugfix
29109 o Major features, new in 0.2.2.21-alpha:
29110 - Introduce minimum/maximum values that clients will believe
29111 from the consensus. Now we'll have a better chance to avoid crashes
29112 or worse when a consensus param has a weird value.
29114 o Minor features, new in 0.2.2.21-alpha:
29115 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
29116 used on bridges, and it makes bridge scanning somewhat easier.
29117 - If writing the state file to disk fails, wait up to an hour before
29118 retrying again, rather than trying again each second. Fixes bug
29119 2346; bugfix on Tor 0.1.1.3-alpha.
29120 - Make Libevent log messages get delivered to controllers later,
29121 and not from inside the Libevent log handler. This prevents unsafe
29122 reentrant Libevent calls while still letting the log messages
29124 - Detect platforms that brokenly use a signed size_t, and refuse to
29125 build there. Found and analyzed by doorss and rransom.
29126 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
29129 o Minor bugfixes, new in 0.2.2.21-alpha:
29130 - Handle SOCKS messages longer than 128 bytes long correctly, rather
29131 than waiting forever for them to finish. Fixes bug 2330; bugfix
29132 on 0.2.0.16-alpha. Found by doorss.
29133 - Add assertions to check for overflow in arguments to
29134 base32_encode() and base32_decode(); fix a signed-unsigned
29135 comparison there too. These bugs are not actually reachable in Tor,
29136 but it's good to prevent future errors too. Found by doorss.
29137 - Correctly detect failures to create DNS requests when using Libevent
29138 versions before v2. (Before Libevent 2, we used our own evdns
29139 implementation. Its return values for Libevent's evdns_resolve_*()
29140 functions are not consistent with those from Libevent.) Fixes bug
29141 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
29143 o Documentation, new in 0.2.2.21-alpha:
29144 - Document the default socks host and port (127.0.0.1:9050) for
29148 Changes in version 0.2.1.29 - 2011-01-15
29149 Tor 0.2.1.29 continues our recent code security audit work. The main
29150 fix resolves a remote heap overflow vulnerability that can allow remote
29151 code execution. Other fixes address a variety of assert and crash bugs,
29152 most of which we think are hard to exploit remotely.
29154 o Major bugfixes (security):
29155 - Fix a heap overflow bug where an adversary could cause heap
29156 corruption. This bug probably allows remote code execution
29157 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
29159 - Prevent a denial-of-service attack by disallowing any
29160 zlib-compressed data whose compression factor is implausibly
29161 high. Fixes part of bug 2324; reported by "doorss".
29162 - Zero out a few more keys in memory before freeing them. Fixes
29163 bug 2384 and part of bug 2385. These key instances found by
29164 "cypherpunks", based on Andrew Case's report about being able
29165 to find sensitive data in Tor's memory space if you have enough
29166 permissions. Bugfix on 0.0.2pre9.
29168 o Major bugfixes (crashes):
29169 - Prevent calls to Libevent from inside Libevent log handlers.
29170 This had potential to cause a nasty set of crashes, especially
29171 if running Libevent with debug logging enabled, and running
29172 Tor with a controller watching for low-severity log messages.
29173 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
29174 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
29175 underflow errors there too. Fixes the other part of bug 2324.
29176 - Fix a bug where we would assert if we ever had a
29177 cached-descriptors.new file (or another file read directly into
29178 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
29179 on 0.2.1.25. Found by doorss.
29180 - Fix some potential asserts and parsing issues with grossly
29181 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
29184 o Minor bugfixes (other):
29185 - Fix a bug with handling misformed replies to reverse DNS lookup
29186 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
29187 bug reported by doorss.
29188 - Fix compilation on mingw when a pthreads compatibility library
29189 has been installed. (We don't want to use it, so we shouldn't
29190 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
29191 - Fix a bug where we would declare that we had run out of virtual
29192 addresses when the address space was only half-exhausted. Bugfix
29194 - Correctly handle the case where AutomapHostsOnResolve is set but
29195 no virtual addresses are available. Fixes bug 2328; bugfix on
29196 0.1.2.1-alpha. Bug found by doorss.
29197 - Correctly handle wrapping around to when we run out of virtual
29198 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
29199 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
29200 because we built it with a too-old version of automake. Thus that
29201 release broke ./configure --enable-openbsd-malloc, which is popular
29202 among really fast exit relays on Linux.
29205 - Update to the January 1 2011 Maxmind GeoLite Country database.
29206 - Introduce output size checks on all of our decryption functions.
29209 - Tor does not build packages correctly with Automake 1.6 and earlier;
29210 added a check to Makefile.am to make sure that we're building with
29211 Automake 1.7 or later.
29214 Changes in version 0.2.2.20-alpha - 2010-12-17
29215 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
29216 exploitable bugs. We also fix a variety of other significant bugs,
29217 change the IP address for one of our directory authorities, and update
29218 the minimum version that Tor relays must run to join the network.
29221 - Fix a remotely exploitable bug that could be used to crash instances
29222 of Tor remotely by overflowing on the heap. Remote-code execution
29223 hasn't been confirmed, but can't be ruled out. Everyone should
29224 upgrade. Bugfix on the 0.1.1 series and later.
29225 - Fix a bug that could break accounting on 64-bit systems with large
29226 time_t values, making them hibernate for impossibly long intervals.
29227 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
29228 - Fix a logic error in directory_fetches_from_authorities() that
29229 would cause all _non_-exits refusing single-hop-like circuits
29230 to fetch from authorities, when we wanted to have _exits_ fetch
29231 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
29233 - Fix a stream fairness bug that would cause newer streams on a given
29234 circuit to get preference when reading bytes from the origin or
29235 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
29236 introduced before the first Tor release, in svn revision r152.
29238 o Directory authority changes:
29239 - Change IP address and ports for gabelmoo (v3 directory authority).
29242 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
29243 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
29244 - Fix an off-by-one error in calculating some controller command
29245 argument lengths. Fortunately, this mistake is harmless since
29246 the controller code does redundant NUL termination too. Found by
29247 boboper. Bugfix on 0.1.1.1-alpha.
29248 - Do not dereference NULL if a bridge fails to build its
29249 extra-info descriptor. Found by an anonymous commenter on
29250 Trac. Bugfix on 0.2.2.19-alpha.
29253 - Update to the December 1 2010 Maxmind GeoLite Country database.
29254 - Directory authorities now reject relays running any versions of
29255 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
29256 known bugs that keep RELAY_EARLY cells from working on rendezvous
29257 circuits. Followup to fix for bug 2081.
29258 - Directory authorities now reject relays running any version of Tor
29259 older than 0.2.0.26-rc. That version is the earliest that fetches
29260 current directory information correctly. Fixes bug 2156.
29261 - Report only the top 10 ports in exit-port stats in order not to
29262 exceed the maximum extra-info descriptor length of 50 KB. Implements
29266 Changes in version 0.2.1.28 - 2010-12-17
29267 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
29268 exploitable bugs. We also took this opportunity to change the IP address
29269 for one of our directory authorities, and to update the geoip database
29273 - Fix a remotely exploitable bug that could be used to crash instances
29274 of Tor remotely by overflowing on the heap. Remote-code execution
29275 hasn't been confirmed, but can't be ruled out. Everyone should
29276 upgrade. Bugfix on the 0.1.1 series and later.
29278 o Directory authority changes:
29279 - Change IP address and ports for gabelmoo (v3 directory authority).
29282 - Update to the December 1 2010 Maxmind GeoLite Country database.
29285 Changes in version 0.2.1.27 - 2010-11-23
29286 Yet another OpenSSL security patch broke its compatibility with Tor:
29287 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
29288 also took this opportunity to fix several crash bugs, integrate a new
29289 directory authority, and update the bundled GeoIP database.
29292 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29293 No longer set the tlsext_host_name extension on server SSL objects;
29294 but continue to set it on client SSL objects. Our goal in setting
29295 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29296 bugfix on 0.2.1.1-alpha.
29297 - Do not log messages to the controller while shrinking buffer
29298 freelists. Doing so would sometimes make the controller connection
29299 try to allocate a buffer chunk, which would mess up the internals
29300 of the freelist and cause an assertion failure. Fixes bug 1125;
29301 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29302 - Learn our external IP address when we're a relay or bridge, even if
29303 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29304 where we introduced bridge relays that don't need to publish to
29305 be useful. Fixes bug 2050.
29306 - Do even more to reject (and not just ignore) annotations on
29307 router descriptors received anywhere but from the cache. Previously
29308 we would ignore such annotations at first, but cache them to disk
29309 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29310 - When you're using bridges and your network goes away and your
29311 bridges get marked as down, recover when you attempt a new socks
29312 connection (if the network is back), rather than waiting up to an
29313 hour to try fetching new descriptors for your bridges. Bugfix on
29314 0.2.0.3-alpha; fixes bug 1981.
29317 - Move to the November 2010 Maxmind GeoLite country db (rather
29318 than the June 2009 ip-to-country GeoIP db) for our statistics that
29319 count how many users relays are seeing from each country. Now we'll
29320 have more accurate data, especially for many African countries.
29322 o New directory authorities:
29323 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29327 - Fix an assertion failure that could occur in directory caches or
29328 bridge users when using a very short voting interval on a testing
29329 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29331 - Enforce multiplicity rules when parsing annotations. Bugfix on
29332 0.2.0.8-alpha. Found by piebeer.
29333 - Allow handshaking OR connections to take a full KeepalivePeriod
29334 seconds to handshake. Previously, we would close them after
29335 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29336 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29338 - When building with --enable-gcc-warnings on OpenBSD, disable
29339 warnings in system headers. This makes --enable-gcc-warnings
29340 pass on OpenBSD 4.8.
29343 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29344 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29345 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29346 Servers can start sending this code when enough clients recognize
29347 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
29348 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29349 Patch from mingw-san.
29352 - Remove the old debian/ directory from the main Tor distribution.
29353 The official Tor-for-debian git repository lives at the URL
29354 https://git.torproject.org/debian/tor.git
29355 - Stop shipping the old doc/website/ directory in the tarball. We
29356 changed the website format in late 2010, and what we shipped in
29357 0.2.1.26 really wasn't that useful anyway.
29360 Changes in version 0.2.2.19-alpha - 2010-11-22
29361 Yet another OpenSSL security patch broke its compatibility with Tor:
29362 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
29365 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29366 No longer set the tlsext_host_name extension on server SSL objects;
29367 but continue to set it on client SSL objects. Our goal in setting
29368 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29369 bugfix on 0.2.1.1-alpha.
29372 - Try harder not to exceed the maximum length of 50 KB when writing
29373 statistics to extra-info descriptors. This bug was triggered by very
29374 fast relays reporting exit-port, entry, and dirreq statistics.
29375 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
29376 - Publish a router descriptor even if generating an extra-info
29377 descriptor fails. Previously we would not publish a router
29378 descriptor without an extra-info descriptor; this can cause fast
29379 exit relays collecting exit-port statistics to drop from the
29380 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
29383 Changes in version 0.2.2.18-alpha - 2010-11-16
29384 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
29385 us lately, makes unpublished bridge relays able to detect their IP
29386 address, and fixes a wide variety of other bugs to get us much closer
29387 to a stable release.
29390 - Do even more to reject (and not just ignore) annotations on
29391 router descriptors received anywhere but from the cache. Previously
29392 we would ignore such annotations at first, but cache them to disk
29393 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29394 - Do not log messages to the controller while shrinking buffer
29395 freelists. Doing so would sometimes make the controller connection
29396 try to allocate a buffer chunk, which would mess up the internals
29397 of the freelist and cause an assertion failure. Fixes bug 1125;
29398 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29399 - Learn our external IP address when we're a relay or bridge, even if
29400 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29401 where we introduced bridge relays that don't need to publish to
29402 be useful. Fixes bug 2050.
29403 - Maintain separate TLS contexts and certificates for incoming and
29404 outgoing connections in bridge relays. Previously we would use the
29405 same TLS contexts and certs for incoming and outgoing connections.
29406 Bugfix on 0.2.0.3-alpha; addresses bug 988.
29407 - Maintain separate identity keys for incoming and outgoing TLS
29408 contexts in bridge relays. Previously we would use the same
29409 identity keys for incoming and outgoing TLS contexts. Bugfix on
29410 0.2.0.3-alpha; addresses the other half of bug 988.
29411 - Avoid an assertion failure when we as an authority receive a
29412 duplicate upload of a router descriptor that we already have,
29413 but which we previously considered an obsolete descriptor.
29414 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
29415 - Avoid a crash bug triggered by looking at a dangling pointer while
29416 setting the network status consensus. Found by Robert Ransom.
29417 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
29418 - Fix a logic error where servers that _didn't_ act as exits would
29419 try to keep their server lists more aggressively up to date than
29420 exits, when it was supposed to be the other way around. Bugfix
29423 o Minor bugfixes (on Tor 0.2.1.x and earlier):
29424 - When we're trying to guess whether we know our IP address as
29425 a relay, we would log various ways that we failed to guess
29426 our address, but never log that we ended up guessing it
29427 successfully. Now add a log line to help confused and anxious
29428 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
29429 - Bring the logic that gathers routerinfos and assesses the
29430 acceptability of circuits into line. This prevents a Tor OP from
29431 getting locked in a cycle of choosing its local OR as an exit for a
29432 path (due to a .exit request) and then rejecting the circuit because
29433 its OR is not listed yet. It also prevents Tor clients from using an
29434 OR running in the same instance as an exit (due to a .exit request)
29435 if the OR does not meet the same requirements expected of an OR
29436 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29437 - Correctly describe errors that occur when generating a TLS object.
29438 Previously we would attribute them to a failure while generating a
29439 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
29441 - Enforce multiplicity rules when parsing annotations. Bugfix on
29442 0.2.0.8-alpha. Found by piebeer.
29443 - Fix warnings that newer versions of autoconf produced during
29444 ./autogen.sh. These warnings appear to be harmless in our case,
29445 but they were extremely verbose. Fixes bug 2020.
29447 o Minor bugfixes (on Tor 0.2.2.x):
29448 - Enable protection of small arrays whenever we build with gcc
29449 hardening features, not only when also building with warnings
29450 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
29453 - Make hidden services work better in private Tor networks by not
29454 requiring any uptime to join the hidden service descriptor
29455 DHT. Implements ticket 2088.
29456 - Rate-limit the "your application is giving Tor only an IP address"
29457 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
29458 - When AllowSingleHopExits is set, print a warning to explain to the
29459 relay operator why most clients are avoiding her relay.
29460 - Update to the November 1 2010 Maxmind GeoLite Country database.
29462 o Code simplifications and refactoring:
29463 - When we fixed bug 1038 we had to put in a restriction not to send
29464 RELAY_EARLY cells on rend circuits. This was necessary as long
29465 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
29466 active. Now remove this obsolete check. Resolves bug 2081.
29467 - Some options used different conventions for uppercasing of acronyms
29468 when comparing manpage and source. Fix those in favor of the
29469 manpage, as it makes sense to capitalize acronyms.
29470 - Remove the torrc.complete file. It hasn't been kept up to date
29471 and users will have better luck checking out the manpage.
29472 - Remove the obsolete "NoPublish" option; it has been flagged
29473 as obsolete and has produced a warning since 0.1.1.18-rc.
29474 - Remove everything related to building the expert bundle for OS X.
29475 It has confused many users, doesn't work right on OS X 10.6,
29476 and is hard to get rid of once installed. Resolves bug 1274.
29479 Changes in version 0.2.2.17-alpha - 2010-09-30
29480 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
29481 to use one-hop circuits (which can put the exit relays at higher risk,
29482 plus unbalance the network); fixes a big bug in bandwidth accounting
29483 for relays that want to limit their monthly bandwidth use; fixes a
29484 big pile of bugs in how clients tolerate temporary network failure;
29485 and makes our adaptive circuit build timeout feature (which improves
29486 client performance if your network is fast while not breaking things
29487 if your network is slow) better handle bad networks.
29490 - Exit relays now try harder to block exit attempts from unknown
29491 relays, to make it harder for people to use them as one-hop proxies
29492 a la tortunnel. Controlled by the refuseunknownexits consensus
29493 parameter (currently enabled), or you can override it on your
29494 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
29496 o Major bugfixes (0.2.1.x and earlier):
29497 - Fix a bug in bandwidth accounting that could make us use twice
29498 the intended bandwidth when our interval start changes due to
29499 daylight saving time. Now we tolerate skew in stored vs computed
29500 interval starts: if the start of the period changes by no more than
29501 50% of the period's duration, we remember bytes that we transferred
29502 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
29503 - Always search the Windows system directory for system DLLs, and
29504 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
29505 - When you're using bridges and your network goes away and your
29506 bridges get marked as down, recover when you attempt a new socks
29507 connection (if the network is back), rather than waiting up to an
29508 hour to try fetching new descriptors for your bridges. Bugfix on
29509 0.2.0.3-alpha; fixes bug 1981.
29511 o Major bugfixes (on 0.2.2.x):
29512 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
29514 - Fix a segfault that could happen when operating a bridge relay with
29515 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
29516 - The consensus bandwidth-weights (used by clients to choose fast
29517 relays) entered an unexpected edge case in September where
29518 Exits were much scarcer than Guards, resulting in bad weight
29519 recommendations. Now we compute them using new constraints that
29520 should succeed in all cases. Also alter directory authorities to
29521 not include the bandwidth-weights line if they fail to produce
29522 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
29523 - When weighting bridges during path selection, we used to trust
29524 the bandwidths they provided in their descriptor, only capping them
29525 at 10MB/s. This turned out to be problematic for two reasons:
29526 Bridges could claim to handle a lot more traffic then they
29527 actually would, thus making more clients pick them and have a
29528 pretty effective DoS attack. The other issue is that new bridges
29529 that might not have a good estimate for their bw capacity yet
29530 would not get used at all unless no other bridges are available
29531 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
29533 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
29534 - Ignore cannibalized circuits when recording circuit build times.
29535 This should provide for a minor performance improvement for hidden
29536 service users using 0.2.2.14-alpha, and should remove two spurious
29537 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
29538 - Simplify the logic that causes us to decide if the network is
29539 unavailable for purposes of recording circuit build times. If we
29540 receive no cells whatsoever for the entire duration of a circuit's
29541 full measured lifetime, the network is probably down. Also ignore
29542 one-hop directory fetching circuit timeouts when calculating our
29543 circuit build times. These changes should hopefully reduce the
29544 cases where we see ridiculous circuit build timeouts for people
29545 with spotty wireless connections. Fixes part of bug 1772; bugfix
29547 - Prevent the circuit build timeout from becoming larger than
29548 the maximum build time we have ever seen. Also, prevent the time
29549 period for measurement circuits from becoming larger than twice that
29550 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
29553 - When we run out of directory information such that we can't build
29554 circuits, but then get enough that we can build circuits, log when
29555 we actually construct a circuit, so the user has a better chance of
29556 knowing what's going on. Fixes bug 1362.
29557 - Be more generous with how much bandwidth we'd use up (with
29558 accounting enabled) before entering "soft hibernation". Previously,
29559 we'd refuse new connections and circuits once we'd used up 95% of
29560 our allotment. Now, we use up 95% of our allotment, AND make sure
29561 that we have no more than 500MB (or 3 hours of expected traffic,
29562 whichever is lower) remaining before we enter soft hibernation.
29563 - If we've configured EntryNodes and our network goes away and/or all
29564 our entrynodes get marked down, optimistically retry them all when
29565 a new socks application request appears. Fixes bug 1882.
29566 - Add some more defensive programming for architectures that can't
29567 handle unaligned integer accesses. We don't know of any actual bugs
29568 right now, but that's the best time to fix them. Fixes bug 1943.
29569 - Support line continuations in the torrc config file. If a line
29570 ends with a single backslash character, the newline is ignored, and
29571 the configuration value is treated as continuing on the next line.
29574 o Minor bugfixes (on 0.2.1.x and earlier):
29575 - For bandwidth accounting, calculate our expected bandwidth rate
29576 based on the time during which we were active and not in
29577 soft-hibernation during the last interval. Previously, we were
29578 also considering the time spent in soft-hibernation. If this
29579 was a long time, we would wind up underestimating our bandwidth
29580 by a lot, and skewing our wakeup time towards the start of the
29581 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
29583 o Minor bugfixes (on 0.2.2.x):
29584 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
29585 which were disabled by the circuit build timeout changes in
29586 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
29587 - Make sure we don't warn about missing bandwidth weights when
29588 choosing bridges or other relays not in the consensus. Bugfix on
29589 0.2.2.10-alpha; fixes bug 1805.
29590 - In our logs, do not double-report signatures from unrecognized
29591 authorities both as "from unknown authority" and "not
29592 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
29595 Changes in version 0.2.2.16-alpha - 2010-09-17
29596 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
29597 evident at exit relays), and also continues to resolve all the little
29598 bugs that have been filling up trac lately.
29600 o Major bugfixes (stream-level fairness):
29601 - When receiving a circuit-level SENDME for a blocked circuit, try
29602 to package cells fairly from all the streams that had previously
29603 been blocked on that circuit. Previously, we had started with the
29604 oldest stream, and allowed each stream to potentially exhaust
29605 the circuit's package window. This gave older streams on any
29606 given circuit priority over newer ones. Fixes bug 1937. Detected
29607 originally by Camilo Viecco. This bug was introduced before the
29608 first Tor release, in svn commit r152: it is the new winner of
29609 the longest-lived bug prize.
29610 - When the exit relay got a circuit-level sendme cell, it started
29611 reading on the exit streams, even if had 500 cells queued in the
29612 circuit queue already, so the circuit queue just grew and grew in
29613 some cases. We fix this by not re-enabling reading on receipt of a
29614 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
29615 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
29617 - Newly created streams were allowed to read cells onto circuits,
29618 even if the circuit's cell queue was blocked and waiting to drain.
29619 This created potential unfairness, as older streams would be
29620 blocked, but newer streams would gladly fill the queue completely.
29621 We add code to detect this situation and prevent any stream from
29622 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
29626 - Update to the September 1 2010 Maxmind GeoLite Country database.
29627 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
29628 not. This would lead to a cookie that is still not group readable.
29629 Closes bug 1843. Suggested by katmagic.
29630 - When logging a rate-limited warning, we now mention how many messages
29631 got suppressed since the last warning.
29632 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
29633 do individual connection-level rate limiting of clients. The torrc
29634 config options with the same names trump the consensus params, if
29635 both are present. Replaces the old "bwconnrate" and "bwconnburst"
29636 consensus params which were broken from 0.2.2.7-alpha through
29637 0.2.2.14-alpha. Closes bug 1947.
29638 - When a router changes IP address or port, authorities now launch
29639 a new reachability test for it. Implements ticket 1899.
29640 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
29641 2 no signature, 4 required" messages about consensus signatures
29642 easier to read, and make sure they get logged at the same severity
29643 as the messages explaining which keys are which. Fixes bug 1290.
29644 - Don't warn when we have a consensus that we can't verify because
29645 of missing certificates, unless those certificates are ones
29646 that we have been trying and failing to download. Fixes bug 1145.
29647 - If you configure your bridge with a known identity fingerprint,
29648 and the bridge authority is unreachable (as it is in at least
29649 one country now), fall back to directly requesting the descriptor
29650 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
29652 - When building with --enable-gcc-warnings on OpenBSD, disable
29653 warnings in system headers. This makes --enable-gcc-warnings
29654 pass on OpenBSD 4.8.
29656 o Minor bugfixes (on 0.2.1.x and earlier):
29657 - Authorities will now attempt to download consensuses if their
29658 own efforts to make a live consensus have failed. This change
29659 means authorities that restart will fetch a valid consensus, and
29660 it means authorities that didn't agree with the current consensus
29661 will still fetch and serve it if it has enough signatures. Bugfix
29662 on 0.2.0.9-alpha; fixes bug 1300.
29663 - Ensure DNS requests launched by "RESOLVE" commands from the
29664 controller respect the __LeaveStreamsUnattached setconf options. The
29665 same goes for requests launched via DNSPort or transparent
29666 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
29667 - Allow handshaking OR connections to take a full KeepalivePeriod
29668 seconds to handshake. Previously, we would close them after
29669 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29670 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29672 - Rate-limit "Failed to hand off onionskin" warnings.
29673 - Never relay a cell for a circuit we have already destroyed.
29674 Between marking a circuit as closeable and finally closing it,
29675 it may have been possible for a few queued cells to get relayed,
29676 even though they would have been immediately dropped by the next
29677 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
29678 - Never queue a cell for a circuit that's already been marked
29680 - Never vote for a server as "Running" if we have a descriptor for
29681 it claiming to be hibernating, and that descriptor was published
29682 more recently than our last contact with the server. Bugfix on
29683 0.2.0.3-alpha; fixes bug 911.
29684 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
29687 o Minor bugfixes (on 0.2.2.x):
29688 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
29689 down if a directory fetch fails and you've configured either
29690 bridges or EntryNodes. The intent was to mark the relay as down
29691 _unless_ you're using bridges or EntryNodes, since if you are
29692 then you could quickly run out of entry points.
29693 - Fix the Windows directory-listing code. A bug introduced in
29694 0.2.2.14-alpha could make Windows directory servers forget to load
29695 some of their cached v2 networkstatus files.
29696 - Really allow clients to use relays as bridges. Fixes bug 1776;
29697 bugfix on 0.2.2.15-alpha.
29698 - Demote a warn to info that happens when the CellStatistics option
29699 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
29700 Reported by Moritz Bartl.
29701 - On Windows, build correctly either with or without Unicode support.
29702 This is necessary so that Tor can support fringe platforms like
29703 Windows 98 (which has no Unicode), or Windows CE (which has no
29704 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
29707 - Add a unit test for cross-platform directory-listing code.
29710 Changes in version 0.2.2.15-alpha - 2010-08-18
29711 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
29712 fixes a variety of other bugs that were preventing performance
29713 experiments from moving forward, fixes several bothersome memory leaks,
29714 and generally closes a lot of smaller bugs that have been filling up
29718 - Stop assigning the HSDir flag to relays that disable their
29719 DirPort (and thus will refuse to answer directory requests). This
29720 fix should dramatically improve the reachability of hidden services:
29721 hidden services and hidden service clients pick six HSDir relays
29722 to store and retrieve the hidden service descriptor, and currently
29723 about half of the HSDir relays will refuse to work. Bugfix on
29724 0.2.0.10-alpha; fixes part of bug 1693.
29725 - The PerConnBWRate and Burst config options, along with the
29726 bwconnrate and bwconnburst consensus params, initialized each conn's
29727 token bucket values only when the connection is established. Now we
29728 update them if the config options change, and update them every time
29729 we get a new consensus. Otherwise we can encounter an ugly edge
29730 case where we initialize an OR conn to client-level bandwidth,
29731 but then later the relay joins the consensus and we leave it
29732 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
29733 - Fix a regression that caused Tor to rebind its ports if it receives
29734 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
29737 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
29738 should give us approximately 40-50% more Guard-flagged nodes,
29739 improving the anonymity the Tor network can provide and also
29740 decreasing the dropoff in throughput that relays experience when
29741 they first get the Guard flag.
29742 - Allow enabling or disabling the *Statistics config options while
29746 - Update to the August 1 2010 Maxmind GeoLite Country database.
29747 - Have the controller interface give a more useful message than
29748 "Internal Error" in response to failed GETINFO requests.
29749 - Warn when the same option is provided more than once in a torrc
29750 file, on the command line, or in a single SETCONF statement, and
29751 the option is one that only accepts a single line. Closes bug 1384.
29752 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29753 Patch from mingw-san.
29754 - Add support for the country code "{??}" in torrc options like
29755 ExcludeNodes, to indicate all routers of unknown country. Closes
29757 - Relays report the number of bytes spent on answering directory
29758 requests in extra-info descriptors similar to {read,write}-history.
29759 Implements enhancement 1790.
29761 o Minor bugfixes (on 0.2.1.x and earlier):
29762 - Complain if PublishServerDescriptor is given multiple arguments that
29763 include 0 or 1. This configuration will be rejected in the future.
29764 Bugfix on 0.2.0.1-alpha; closes bug 1107.
29765 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
29766 Bugfix on 0.2.0.13-alpha; closes bug 928.
29767 - Change "Application request when we're believed to be offline."
29768 notice to "Application request when we haven't used client
29769 functionality lately.", to clarify that it's not an error. Bugfix
29770 on 0.0.9.3; fixes bug 1222.
29771 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
29772 would return "551 Internal error" rather than "552 Unrecognized key
29773 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
29774 - Users can't configure a regular relay to be their bridge. It didn't
29775 work because when Tor fetched the bridge descriptor, it found
29776 that it already had it, and didn't realize that the purpose of the
29777 descriptor had changed. Now we replace routers with a purpose other
29778 than bridge with bridge descriptors when fetching them. Bugfix on
29779 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
29780 refetch the descriptor with router purpose 'general', disabling
29782 - Fix a rare bug in rend_fn unit tests: we would fail a test when
29783 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
29784 on 0.2.0.10-alpha; fixes bug 1808.
29785 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29786 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29787 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29788 Servers can start sending this code when enough clients recognize
29789 it. Also update the spec to reflect this new reason. Bugfix on
29790 0.1.0.1-rc; fixes part of bug 1793.
29791 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
29792 when we switch from being a public relay to a bridge. Otherwise
29793 there will still be clients that see the relay in their consensus,
29794 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
29796 - Instead of giving an assertion failure on an internal mismatch
29797 on estimated freelist size, just log a BUG warning and try later.
29798 Mitigates but does not fix bug 1125.
29799 - Fix an assertion failure that could occur in caches or bridge users
29800 when using a very short voting interval on a testing network.
29801 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
29803 o Minor bugfixes (on 0.2.2.x):
29804 - Alter directory authorities to always consider Exit-flagged nodes
29805 as potential Guard nodes in their votes. The actual decision to
29806 use Exits as Guards is done in the consensus bandwidth weights.
29807 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
29808 - When the controller is reporting the purpose of circuits that
29809 didn't finish building before the circuit build timeout, it was
29810 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
29811 - Our libevent version parsing code couldn't handle versions like
29812 1.4.14b-stable and incorrectly warned the user about using an
29813 old and broken version of libevent. Treat 1.4.14b-stable like
29814 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
29816 - Don't use substitution references like $(VAR:MOD) when
29817 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
29818 '$(:x)' to 'x' rather than the empty string. This bites us in
29819 doc/ when configured with --disable-asciidoc. Bugfix on
29820 0.2.2.9-alpha; fixes bug 1773.
29821 - Remove a spurious hidden service server-side log notice about
29822 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
29824 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
29826 - Correctly report written bytes on linked connections. Found while
29827 implementing 1790. Bugfix on 0.2.2.4-alpha.
29828 - Fix three memory leaks: one in circuit_build_times_parse_state(),
29829 one in dirvote_add_signatures_to_pending_consensus(), and one every
29830 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
29831 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
29833 o Code simplifications and refactoring:
29834 - Take a first step towards making or.h smaller by splitting out
29835 function definitions for all source files in src/or/. Leave
29836 structures and defines in or.h for now.
29837 - Remove a bunch of unused function declarations as well as a block of
29838 #if 0'd code from the unit tests. Closes bug 1824.
29839 - New unit tests for exit-port history statistics; refactored exit
29840 statistics code to be more easily tested.
29841 - Remove the old debian/ directory from the main Tor distribution.
29842 The official Tor-for-debian git repository lives at the URL
29843 https://git.torproject.org/debian/tor.git
29846 Changes in version 0.2.2.14-alpha - 2010-07-12
29847 Tor 0.2.2.14-alpha greatly improves client-side handling of
29848 circuit build timeouts, which are used to estimate speed and improve
29849 performance. We also move to a much better GeoIP database, port Tor to
29850 Windows CE, introduce new compile flags that improve code security,
29851 add an eighth v3 directory authority, and address a lot of more
29855 - Tor directory authorities no longer crash when started with a
29856 cached-microdesc-consensus file in their data directory. Bugfix
29857 on 0.2.2.6-alpha; fixes bug 1532.
29858 - Treat an unset $HOME like an empty $HOME rather than triggering an
29859 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
29860 - Ignore negative and large circuit build timeout values that can
29861 happen during a suspend or hibernate. These values caused various
29862 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
29863 - Alter calculation of Pareto distribution parameter 'Xm' for
29864 Circuit Build Timeout learning to use the weighted average of the
29865 top N=3 modes (because we have three entry guards). Considering
29866 multiple modes should improve the timeout calculation in some cases,
29867 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
29869 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
29870 right censored distribution model. This approach improves over the
29871 synthetic timeout generation approach that was producing insanely
29872 high timeout values. Now we calculate build timeouts using truncated
29873 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
29874 - Do not close circuits that are under construction when they reach
29875 the circuit build timeout. Instead, leave them building (but do not
29876 use them) for up until the time corresponding to the 95th percentile
29877 on the Pareto CDF or 60 seconds, whichever is greater. This is done
29878 to provide better data for the new Pareto model. This percentile
29879 can be controlled by the consensus.
29882 - Move to the June 2010 Maxmind GeoLite country db (rather than the
29883 June 2009 ip-to-country GeoIP db) for our statistics that count
29884 how many users relays are seeing from each country. Now we have
29885 more accurate data for many African countries.
29886 - Port Tor to build and run correctly on Windows CE systems, using
29887 the wcecompat library. Contributed by Valerio Lupi.
29888 - New "--enable-gcc-hardening" ./configure flag (off by default)
29889 to turn on gcc compile time hardening options. It ensures
29890 that signed ints have defined behavior (-fwrapv), enables
29891 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
29892 with canaries (-fstack-protector-all), turns on ASLR protection if
29893 supported by the kernel (-fPIE, -pie), and adds additional security
29894 related warnings. Verified to work on Mac OS X and Debian Lenny.
29895 - New "--enable-linker-hardening" ./configure flag (off by default)
29896 to turn on ELF specific hardening features (relro, now). This does
29897 not work with Mac OS X or any other non-ELF binary format.
29899 o New directory authorities:
29900 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29904 - New config option "WarnUnsafeSocks 0" disables the warning that
29905 occurs whenever Tor receives a socks handshake using a version of
29906 the socks protocol that can only provide an IP address (rather
29907 than a hostname). Setups that do DNS locally over Tor are fine,
29908 and we shouldn't spam the logs in that case.
29909 - Convert the HACKING file to asciidoc, and add a few new sections
29910 to it, explaining how we use Git, how we make changelogs, and
29911 what should go in a patch.
29912 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
29913 event, to give information on the current rate of circuit timeouts
29914 over our stored history.
29915 - Add ability to disable circuit build time learning via consensus
29916 parameter and via a LearnCircuitBuildTimeout config option. Also
29917 automatically disable circuit build time calculation if we are
29918 either a AuthoritativeDirectory, or if we fail to write our state
29919 file. Fixes bug 1296.
29920 - More gracefully handle corrupt state files, removing asserts
29921 in favor of saving a backup and resetting state.
29922 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
29926 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
29928 - When a2x fails, mention that the user could disable manpages instead
29929 of trying to fix their asciidoc installation.
29930 - Where available, use Libevent 2.0's periodic timers so that our
29931 once-per-second cleanup code gets called even more closely to
29932 once per second than it would otherwise. Fixes bug 943.
29933 - If you run a bridge that listens on multiple IP addresses, and
29934 some user configures a bridge address that uses a different IP
29935 address than your bridge writes in its router descriptor, and the
29936 user doesn't specify an identity key, their Tor would discard the
29937 descriptor because "it isn't one of our configured bridges", and
29938 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
29939 Bugfix on 0.2.0.3-alpha.
29940 - If OpenSSL fails to make a duplicate of a private or public key, log
29941 an error message and try to exit cleanly. May help with debugging
29942 if bug 1209 ever remanifests.
29943 - Save a couple bytes in memory allocation every time we escape
29944 certain characters in a string. Patch from Florian Zumbiehl.
29945 - Make it explicit that we don't cannibalize one-hop circuits. This
29946 happens in the wild, but doesn't turn out to be a problem because
29947 we fortunately don't use those circuits. Many thanks to outofwords
29948 for the initial analysis and to swissknife who confirmed that
29949 two-hop circuits are actually created.
29950 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
29951 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
29952 - Eliminate a case where a circuit build time warning was displayed
29953 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
29956 Changes in version 0.2.1.26 - 2010-05-02
29957 Tor 0.2.1.26 addresses the recent connection and memory overload
29958 problems we've been seeing on relays, especially relays with their
29959 DirPort open. If your relay has been crashing, or you turned it off
29960 because it used too many resources, give this release a try.
29962 This release also fixes yet another instance of broken OpenSSL libraries
29963 that was causing some relays to drop out of the consensus.
29966 - Teach relays to defend themselves from connection overload. Relays
29967 now close idle circuits early if it looks like they were intended
29968 for directory fetches. Relays are also more aggressive about closing
29969 TLS connections that have no circuits on them. Such circuits are
29970 unlikely to be re-used, and tens of thousands of them were piling
29971 up at the fast relays, causing the relays to run out of sockets
29972 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
29973 their directory fetches over TLS).
29974 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
29975 that claim to be earlier than 0.9.8m, but which have in reality
29976 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
29977 behavior. Possible fix for some cases of bug 1346.
29978 - Directory mirrors were fetching relay descriptors only from v2
29979 directory authorities, rather than v3 authorities like they should.
29980 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
29981 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
29984 - Finally get rid of the deprecated and now harmful notion of "clique
29985 mode", where directory authorities maintain TLS connections to
29989 - In the util/threads test, no longer free the test_mutex before all
29990 worker threads have finished. Bugfix on 0.2.1.6-alpha.
29991 - The master thread could starve the worker threads quite badly on
29992 certain systems, causing them to run only partially in the allowed
29993 window. This resulted in test failures. Now the master thread sleeps
29994 occasionally for a few microseconds while the two worker-threads
29995 compete for the mutex. Bugfix on 0.2.0.1-alpha.
29998 Changes in version 0.2.2.13-alpha - 2010-04-24
29999 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
30000 problems we've been seeing on relays, especially relays with their
30001 DirPort open. If your relay has been crashing, or you turned it off
30002 because it used too many resources, give this release a try.
30005 - Teach relays to defend themselves from connection overload. Relays
30006 now close idle circuits early if it looks like they were intended
30007 for directory fetches. Relays are also more aggressive about closing
30008 TLS connections that have no circuits on them. Such circuits are
30009 unlikely to be re-used, and tens of thousands of them were piling
30010 up at the fast relays, causing the relays to run out of sockets
30011 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
30012 their directory fetches over TLS).
30015 - Finally get rid of the deprecated and now harmful notion of "clique
30016 mode", where directory authorities maintain TLS connections to
30018 - Directory authorities now do an immediate reachability check as soon
30019 as they hear about a new relay. This change should slightly reduce
30020 the time between setting up a relay and getting listed as running
30021 in the consensus. It should also improve the time between setting
30022 up a bridge and seeing use by bridge users.
30023 - Directory authorities no longer launch a TLS connection to every
30024 relay as they startup. Now that we have 2k+ descriptors cached,
30025 the resulting network hiccup is becoming a burden. Besides,
30026 authorities already avoid voting about Running for the first half
30027 hour of their uptime.
30030 Changes in version 0.2.2.12-alpha - 2010-04-20
30031 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
30032 handle and vote on descriptors. It was causing relays to drop out of
30036 - Many relays have been falling out of the consensus lately because
30037 not enough authorities know about their descriptor for them to get
30038 a majority of votes. When we deprecated the v2 directory protocol,
30039 we got rid of the only way that v3 authorities can hear from each
30040 other about other descriptors. Now authorities examine every v3
30041 vote for new descriptors, and fetch them from that authority. Bugfix
30043 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
30044 and a warning in or.h related to bandwidth_weight_rule_t that
30045 prevented clean compile on OS X. Fixes bug 1363; bugfix on
30047 - Fix a segfault on relays when DirReqStatistics is enabled
30048 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
30052 - Demote a confusing TLS warning that relay operators might get when
30053 someone tries to talk to their OrPort. It is neither the operator's
30054 fault nor can they do anything about it. Fixes bug 1364; bugfix
30058 Changes in version 0.2.2.11-alpha - 2010-04-15
30059 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
30060 libraries that was causing some relays to drop out of the consensus.
30063 - Directory mirrors were fetching relay descriptors only from v2
30064 directory authorities, rather than v3 authorities like they should.
30065 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
30066 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
30067 - Fix a parsing error that made every possible value of
30068 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
30069 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
30070 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
30071 about the option without breaking older ones.
30072 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
30073 that claim to be earlier than 0.9.8m, but which have in reality
30074 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
30075 behavior. Possible fix for some cases of bug 1346.
30078 - Experiment with a more aggressive approach to preventing clients
30079 from making one-hop exit streams. Exit relays who want to try it
30080 out can set "RefuseUnknownExits 1" in their torrc, and then look
30081 for "Attempt by %s to open a stream" log messages. Let us know
30083 - Add support for statically linking zlib by specifying
30084 --enable-static-zlib, to go with our support for statically linking
30085 openssl and libevent. Resolves bug 1358.
30088 - Fix a segfault that happens whenever a Tor client that is using
30089 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
30091 - When we cleaned up the contrib/tor-exit-notice.html file, we left
30092 out the first line. Fixes bug 1295.
30093 - When building the manpage from a tarball, we required asciidoc, but
30094 the asciidoc -> roff/html conversion was already done for the
30095 tarball. Make 'make' complain only when we need asciidoc (either
30096 because we're compiling directly from git, or because we altered
30097 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
30098 - When none of the directory authorities vote on any params, Tor
30099 segfaulted when trying to make the consensus from the votes. We
30100 didn't trigger the bug in practice, because authorities do include
30101 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
30104 - In the util/threads test, no longer free the test_mutex before all
30105 worker threads have finished. Bugfix on 0.2.1.6-alpha.
30106 - The master thread could starve the worker threads quite badly on
30107 certain systems, causing them to run only partially in the allowed
30108 window. This resulted in test failures. Now the master thread sleeps
30109 occasionally for a few microseconds while the two worker-threads
30110 compete for the mutex. Bugfix on 0.2.0.1-alpha.
30113 Changes in version 0.2.2.10-alpha - 2010-03-07
30114 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
30115 could prevent relays from guessing their IP address correctly. It also
30116 starts the groundwork for another client-side performance boost, since
30117 currently we're not making efficient use of relays that have both the
30118 Guard flag and the Exit flag.
30121 - Fix a regression from our patch for bug 1244 that caused relays
30122 to guess their IP address incorrectly if they didn't set Address
30123 in their torrc and/or their address fails to resolve. Bugfix on
30124 0.2.2.9-alpha; fixes bug 1269.
30126 o Major features (performance):
30127 - Directory authorities now compute consensus weightings that instruct
30128 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
30129 and no flag. Clients that use these weightings will distribute
30130 network load more evenly across these different relay types. The
30131 weightings are in the consensus so we can change them globally in
30132 the future. Extra thanks to "outofwords" for finding some nasty
30133 security bugs in the first implementation of this feature.
30135 o Minor features (performance):
30136 - Always perform router selections using weighted relay bandwidth,
30137 even if we don't need a high capacity circuit at the time. Non-fast
30138 circuits now only differ from fast ones in that they can use relays
30139 not marked with the Fast flag. This "feature" could turn out to
30140 be a horrible bug; we should investigate more before it goes into
30144 - Allow disabling building of the manpages. Skipping the manpage
30145 speeds up the build considerably.
30147 o Minor bugfixes (on 0.2.2.x):
30148 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
30149 Bugfix on 0.2.2.9-alpha.
30150 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
30151 config option. Bugfix on 0.2.2.7-alpha.
30152 - Ship the asciidoc-helper file in the tarball, so that people can
30153 build from source if they want to, and touching the .1.txt files
30154 doesn't break the build. Bugfix on 0.2.2.9-alpha.
30156 o Minor bugfixes (on 0.2.1.x or earlier):
30157 - Fix a dereference-then-NULL-check sequence when publishing
30158 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30160 - Fix another dereference-then-NULL-check sequence. Bugfix on
30161 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30162 - Make sure we treat potentially not NUL-terminated strings correctly.
30163 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30165 o Code simplifications and refactoring:
30166 - Fix some urls in the exit notice file and make it XHTML1.1 strict
30167 compliant. Based on a patch from Christian Kujau.
30168 - Don't use sed in asciidoc-helper anymore.
30169 - Make the build process fail if asciidoc cannot be found and
30170 building with asciidoc isn't disabled.
30173 Changes in version 0.2.2.9-alpha - 2010-02-22
30174 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
30175 location of a directory authority, and cleans up a bunch of small bugs.
30177 o Directory authority changes:
30178 - Change IP address for dannenberg (v3 directory authority), and
30179 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30180 service directory authority) from the list.
30183 - Make Tor work again on the latest OS X: when deciding whether to
30184 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30185 version at run-time, not compile time. We need to do this because
30186 Apple doesn't update its dev-tools headers when it updates its
30187 libraries in a security patch.
30188 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30189 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30190 a memory leak when requesting a hidden service descriptor we've
30191 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30193 - Authorities could be tricked into giving out the Exit flag to relays
30194 that didn't allow exiting to any ports. This bug could screw
30195 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
30196 1238. Bug discovered by Martin Kowalczyk.
30197 - When freeing a session key, zero it out completely. We only zeroed
30198 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30199 patched by ekir. Fixes bug 1254.
30202 - Fix static compilation by listing the openssl libraries in the right
30203 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
30204 - Resume handling .exit hostnames in a special way: originally we
30205 stripped the .exit part and used the requested exit relay. In
30206 0.2.2.1-alpha we stopped treating them in any special way, meaning
30207 if you use a .exit address then Tor will pass it on to the exit
30208 relay. Now we reject the .exit stream outright, since that behavior
30209 might be more expected by the user. Found and diagnosed by Scott
30210 Bennett and Downie on or-talk.
30211 - Don't spam the controller with events when we have no file
30212 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
30213 for log messages was already solved from bug 748.)
30214 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
30216 - Make the DNSPort option work with libevent 2.x. Don't alter the
30217 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
30218 - Emit a GUARD DROPPED controller event for a case we missed.
30219 - Make more fields in the controller protocol case-insensitive, since
30220 control-spec.txt said they were.
30221 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30222 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30223 - Fix a spec conformance issue: the network-status-version token
30224 must be the first token in a v3 consensus or vote. Discovered by
30225 parakeep. Bugfix on 0.2.0.3-alpha.
30227 o Code simplifications and refactoring:
30228 - Generate our manpage and HTML documentation using Asciidoc. This
30229 change should make it easier to maintain the documentation, and
30230 produce nicer HTML.
30231 - Remove the --enable-iphone option. According to reports from Marco
30232 Bonetti, Tor builds fine without any special tweaking on recent
30233 iPhone SDK versions.
30234 - Removed some unnecessary files from the source distribution. The
30235 AUTHORS file has now been merged into the people page on the
30236 website. The roadmaps and design doc can now be found in the
30237 projects directory in svn.
30238 - Enabled various circuit build timeout constants to be controlled
30239 by consensus parameters. Also set better defaults for these
30240 parameters based on experimentation on broadband and simulated
30241 high latency links.
30244 - The 'EXTENDCIRCUIT' control port command can now be used with
30245 a circ id of 0 and no path. This feature will cause Tor to build
30246 a new 'fast' general purpose circuit using its own path selection
30248 - Added a BUILDTIMEOUT_SET controller event to describe changes
30249 to the circuit build timeout.
30250 - Future-proof the controller protocol a bit by ignoring keyword
30251 arguments we do not recognize.
30252 - Expand homedirs passed to tor-checkkey. This should silence a
30253 coverity complaint about passing a user-supplied string into
30254 open() without checking it.
30257 Changes in version 0.2.1.25 - 2010-03-16
30258 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
30259 prevent relays from guessing their IP address correctly. It also fixes
30260 several minor potential security bugs.
30263 - Fix a regression from our patch for bug 1244 that caused relays
30264 to guess their IP address incorrectly if they didn't set Address
30265 in their torrc and/or their address fails to resolve. Bugfix on
30266 0.2.1.23; fixes bug 1269.
30267 - When freeing a session key, zero it out completely. We only zeroed
30268 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
30269 patched by ekir. Fixes bug 1254.
30272 - Fix a dereference-then-NULL-check sequence when publishing
30273 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
30275 - Fix another dereference-then-NULL-check sequence. Bugfix on
30276 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
30277 - Make sure we treat potentially not NUL-terminated strings correctly.
30278 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
30282 Changes in version 0.2.1.24 - 2010-02-21
30283 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
30287 - Work correctly out-of-the-box with even more vendor-patched versions
30288 of OpenSSL. In particular, make it so Debian and OS X don't need
30289 customized patches to run/build.
30292 Changes in version 0.2.1.23 - 2010-02-13
30293 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
30294 again on the latest OS X, and updates the location of a directory
30297 o Major bugfixes (performance):
30298 - We were selecting our guards uniformly at random, and then weighting
30299 which of our guards we'd use uniformly at random. This imbalance
30300 meant that Tor clients were severely limited on throughput (and
30301 probably latency too) by the first hop in their circuit. Now we
30302 select guards weighted by currently advertised bandwidth. We also
30303 automatically discard guards picked using the old algorithm. Fixes
30304 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30307 - Make Tor work again on the latest OS X: when deciding whether to
30308 use strange flags to turn TLS renegotiation on, detect the OpenSSL
30309 version at run-time, not compile time. We need to do this because
30310 Apple doesn't update its dev-tools headers when it updates its
30311 libraries in a security patch.
30312 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
30313 that could happen on 32-bit platforms with 64-bit time_t. Also fix
30314 a memory leak when requesting a hidden service descriptor we've
30315 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
30318 o Directory authority changes:
30319 - Change IP address for dannenberg (v3 directory authority), and
30320 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
30321 service directory authority) from the list.
30324 - Refactor resolve_my_address() to not use gethostbyname() anymore.
30325 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
30328 - Avoid a mad rush at the beginning of each month when each client
30329 rotates half of its guards. Instead we spread the rotation out
30330 throughout the month, but we still avoid leaving a precise timestamp
30331 in the state file about when we first picked the guard. Improves
30332 over the behavior introduced in 0.1.2.17.
30335 Changes in version 0.2.2.8-alpha - 2010-01-26
30336 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30337 causing bridge relays to disappear. If you're running a bridge,
30341 - Fix a memory corruption bug on bridges that occurred during the
30342 inclusion of stats data in extra-info descriptors. Also fix the
30343 interface for geoip_get_bridge_stats* to prevent similar bugs in
30344 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
30345 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
30348 - Ignore OutboundBindAddress when connecting to localhost.
30349 Connections to localhost need to come _from_ localhost, or else
30350 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
30354 Changes in version 0.2.2.7-alpha - 2010-01-19
30355 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
30356 as laying the groundwork for further relay-side performance fixes. It
30357 also starts cleaning up client behavior with respect to the EntryNodes,
30358 ExitNodes, and StrictNodes config options.
30360 This release also rotates two directory authority keys, due to a
30361 security breach of some of the Torproject servers.
30363 o Directory authority changes:
30364 - Rotate keys (both v3 identity and relay identity) for moria1
30367 o Major features (performance):
30368 - We were selecting our guards uniformly at random, and then weighting
30369 which of our guards we'd use uniformly at random. This imbalance
30370 meant that Tor clients were severely limited on throughput (and
30371 probably latency too) by the first hop in their circuit. Now we
30372 select guards weighted by currently advertised bandwidth. We also
30373 automatically discard guards picked using the old algorithm. Fixes
30374 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30375 - When choosing which cells to relay first, relays can now favor
30376 circuits that have been quiet recently, to provide lower latency
30377 for low-volume circuits. By default, relays enable or disable this
30378 feature based on a setting in the consensus. You can override
30379 this default by using the new "CircuitPriorityHalflife" config
30380 option. Design and code by Ian Goldberg, Can Tang, and Chris
30382 - Add separate per-conn write limiting to go with the per-conn read
30383 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
30384 but never per-conn write limits.
30385 - New consensus params "bwconnrate" and "bwconnburst" to let us
30386 rate-limit client connections as they enter the network. It's
30387 controlled in the consensus so we can turn it on and off for
30388 experiments. It's starting out off. Based on proposal 163.
30390 o Major features (relay selection options):
30391 - Switch to a StrictNodes config option, rather than the previous
30392 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
30393 "StrictExcludeNodes" option.
30394 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
30395 change during a config reload, mark and discard all our origin
30396 circuits. This fix should address edge cases where we change the
30397 config options and but then choose a circuit that we created before
30399 - If EntryNodes or ExitNodes are set, be more willing to use an
30400 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
30402 - Make EntryNodes config option much more aggressive even when
30403 StrictNodes is not set. Before it would prepend your requested
30404 entrynodes to your list of guard nodes, but feel free to use others
30405 after that. Now it chooses only from your EntryNodes if any of
30406 those are available, and only falls back to others if a) they're
30407 all down and b) StrictNodes is not set.
30408 - Now we refresh your entry guards from EntryNodes at each consensus
30409 fetch -- rather than just at startup and then they slowly rot as
30410 the network changes.
30413 - Stop bridge directory authorities from answering dbg-stability.txt
30414 directory queries, which would let people fetch a list of all
30415 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30418 - Log a notice when we get a new control connection. Now it's easier
30419 for security-conscious users to recognize when a local application
30420 is knocking on their controller door. Suggested by bug 1196.
30421 - New config option "CircuitStreamTimeout" to override our internal
30422 timeout schedule for how many seconds until we detach a stream from
30423 a circuit and try a new circuit. If your network is particularly
30424 slow, you might want to set this to a number like 60.
30425 - New controller command "getinfo config-text". It returns the
30426 contents that Tor would write if you send it a SAVECONF command,
30427 so the controller can write the file to disk itself.
30428 - New options for SafeLogging to allow scrubbing only log messages
30429 generated while acting as a relay.
30430 - Ship the bridges spec file in the tarball too.
30431 - Avoid a mad rush at the beginning of each month when each client
30432 rotates half of its guards. Instead we spread the rotation out
30433 throughout the month, but we still avoid leaving a precise timestamp
30434 in the state file about when we first picked the guard. Improves
30435 over the behavior introduced in 0.1.2.17.
30437 o Minor bugfixes (compiling):
30438 - Fix compilation on OS X 10.3, which has a stub mlockall() but
30439 hides it. Bugfix on 0.2.2.6-alpha.
30440 - Fix compilation on Solaris by removing support for the
30441 DisableAllSwap config option. Solaris doesn't have an rlimit for
30442 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
30445 o Minor bugfixes (crashes):
30446 - Do not segfault when writing buffer stats when we haven't observed
30447 a single circuit to report about. Found by Fabian Lanze. Bugfix on
30449 - If we're in the pathological case where there's no exit bandwidth
30450 but there is non-exit bandwidth, or no guard bandwidth but there
30451 is non-guard bandwidth, don't crash during path selection. Bugfix
30453 - Fix an impossible-to-actually-trigger buffer overflow in relay
30454 descriptor generation. Bugfix on 0.1.0.15.
30456 o Minor bugfixes (privacy):
30457 - Fix an instance where a Tor directory mirror might accidentally
30458 log the IP address of a misbehaving Tor client. Bugfix on
30460 - Don't list Windows capabilities in relay descriptors. We never made
30461 use of them, and maybe it's a bad idea to publish them. Bugfix
30464 o Minor bugfixes (other):
30465 - Resolve an edge case in path weighting that could make us misweight
30466 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
30467 - Fix statistics on client numbers by country as seen by bridges that
30468 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
30469 intervals instead of variable 12-to-48-hour intervals.
30470 - After we free an internal connection structure, overwrite it
30471 with a different memory value than we use for overwriting a freed
30472 internal circuit structure. Should help with debugging. Suggested
30474 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
30477 o Removed features:
30478 - Remove the HSAuthorityRecordStats option that version 0 hidden
30479 service authorities could have used to track statistics of overall
30480 hidden service usage.
30483 Changes in version 0.2.1.22 - 2010-01-19
30484 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
30485 authorities -- it would tell you its whole history of bridge descriptors
30486 if you make the right directory request. This stable update also
30487 rotates two of the seven v3 directory authority keys and locations.
30489 o Directory authority changes:
30490 - Rotate keys (both v3 identity and relay identity) for moria1
30494 - Stop bridge directory authorities from answering dbg-stability.txt
30495 directory queries, which would let people fetch a list of all
30496 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30499 Changes in version 0.2.1.21 - 2009-12-21
30500 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
30501 library. If you use Tor on Linux / Unix and you're getting SSL
30502 renegotiation errors, upgrading should help. We also recommend an
30503 upgrade if you're an exit relay.
30506 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30507 handshake from working unless we explicitly tell OpenSSL that we
30508 are using SSL renegotiation safely. We are, of course, but OpenSSL
30509 0.9.8l won't work unless we say we are.
30510 - Avoid crashing if the client is trying to upload many bytes and the
30511 circuit gets torn down at the same time, or if the flip side
30512 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
30515 - Do not refuse to learn about authority certs and v2 networkstatus
30516 documents that are older than the latest consensus. This bug might
30517 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30518 Spotted and fixed by xmux.
30519 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
30520 trigger platform-specific option misparsing case found by Coverity
30522 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
30523 trigger assert. Fixes bug 1173.
30526 Changes in version 0.2.2.6-alpha - 2009-11-19
30527 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
30528 support for the new lower-footprint "microdescriptor" directory design,
30529 future-proofing our consensus format against new hash functions or
30530 other changes, and an Android port. It also makes Tor compatible with
30531 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
30534 - Directory authorities can now create, vote on, and serve multiple
30535 parallel formats of directory data as part of their voting process.
30536 Partially implements Proposal 162: "Publish the consensus in
30538 - Directory authorities can now agree on and publish small summaries
30539 of router information that clients can use in place of regular
30540 server descriptors. This transition will eventually allow clients
30541 to use far less bandwidth for downloading information about the
30542 network. Begins the implementation of Proposal 158: "Clients
30543 download consensus + microdescriptors".
30544 - The directory voting system is now extensible to use multiple hash
30545 algorithms for signatures and resource selection. Newer formats
30546 are signed with SHA256, with a possibility for moving to a better
30547 hash algorithm in the future.
30548 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
30549 current and future memory pages via mlockall(). On supported
30550 platforms (modern Linux and probably BSD but not Windows or OS X),
30551 this should effectively disable any and all attempts to page out
30552 memory. This option requires that you start your Tor as root --
30553 if you use DisableAllSwap, please consider using the User option
30554 to properly reduce the privileges of your Tor.
30555 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
30556 to help Tor build correctly for Android phones.
30559 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30560 handshake from working unless we explicitly tell OpenSSL that we
30561 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
30562 won't work unless we say we are.
30565 - Fix a crash bug when trying to initialize the evdns module in
30566 Libevent 2. Bugfix on 0.2.1.16-rc.
30567 - Stop logging at severity 'warn' when some other Tor client tries
30568 to establish a circuit with us using weak DH keys. It's a protocol
30569 violation, but that doesn't mean ordinary users need to hear about
30570 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
30571 - Do not refuse to learn about authority certs and v2 networkstatus
30572 documents that are older than the latest consensus. This bug might
30573 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30574 Spotted and fixed by xmux.
30575 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
30576 - If all authorities restart at once right before a consensus vote,
30577 nobody will vote about "Running", and clients will get a consensus
30578 with no usable relays. Instead, authorities refuse to build a
30579 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
30580 - If your relay can't keep up with the number of incoming create
30581 cells, it would log one warning per failure into your logs. Limit
30582 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
30583 - Bridges now use "reject *:*" as their default exit policy. Bugfix
30584 on 0.2.0.3-alpha; fixes bug 1113.
30585 - Fix a memory leak on directory authorities during voting that was
30586 introduced in 0.2.2.1-alpha. Found via valgrind.
30589 Changes in version 0.2.1.20 - 2009-10-15
30590 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
30591 services at once, prepares for more performance improvements, and
30592 fixes a bunch of smaller bugs.
30594 The Windows and OS X bundles also include a more recent Vidalia,
30595 and switch from Privoxy to Polipo.
30597 The OS X installers are now drag and drop. It's best to un-install
30598 Tor/Vidalia and then install this new bundle, rather than upgrade. If
30599 you want to upgrade, you'll need to update the paths for Tor and Polipo
30600 in the Vidalia Settings window.
30603 - Send circuit or stream sendme cells when our window has decreased
30604 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30605 by Karsten when testing the "reduce circuit window" performance
30606 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30607 before the release of Tor 0.0.0. This is the new winner of the
30609 - Fix a remotely triggerable memory leak when a consensus document
30610 contains more than one signature from the same voter. Bugfix on
30612 - Avoid segfault in rare cases when finishing an introduction circuit
30613 as a client and finding out that we don't have an introduction key
30614 for it. Fixes bug 1073. Reported by Aaron Swartz.
30617 - Tor now reads the "circwindow" parameter out of the consensus,
30618 and uses that value for its circuit package window rather than the
30619 default of 1000 cells. Begins the implementation of proposal 168.
30621 o New directory authorities:
30622 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30624 - Move moria1 and tonga to alternate IP addresses.
30627 - Fix a signed/unsigned compile warning in 0.2.1.19.
30628 - Fix possible segmentation fault on directory authorities. Bugfix on
30630 - Fix an extremely rare infinite recursion bug that could occur if
30631 we tried to log a message after shutting down the log subsystem.
30632 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30633 - Fix an obscure bug where hidden services on 64-bit big-endian
30634 systems might mis-read the timestamp in v3 introduce cells, and
30635 refuse to connect back to the client. Discovered by "rotor".
30636 Bugfix on 0.2.1.6-alpha.
30637 - We were triggering a CLOCK_SKEW controller status event whenever
30638 we connect via the v2 connection protocol to any relay that has
30639 a wrong clock. Instead, we should only inform the controller when
30640 it's a trusted authority that claims our clock is wrong. Bugfix
30641 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30642 - We were telling the controller about CHECKING_REACHABILITY and
30643 REACHABILITY_FAILED status events whenever we launch a testing
30644 circuit or notice that one has failed. Instead, only tell the
30645 controller when we want to inform the user of overall success or
30646 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30648 - Don't warn when we're using a circuit that ends with a node
30649 excluded in ExcludeExitNodes, but the circuit is not used to access
30650 the outside world. This should help fix bug 1090. Bugfix on
30652 - Work around a small memory leak in some versions of OpenSSL that
30653 stopped the memory used by the hostname TLS extension from being
30657 - Add a "getinfo status/accepted-server-descriptor" controller
30658 command, which is the recommended way for controllers to learn
30659 whether our server descriptor has been successfully received by at
30660 least on directory authority. Un-recommend good-server-descriptor
30661 getinfo and status events until we have a better design for them.
30664 Changes in version 0.2.2.5-alpha - 2009-10-11
30665 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
30668 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
30670 o Directory authorities:
30671 - Temporarily (just for this release) move dizum to an alternate
30675 Changes in version 0.2.2.4-alpha - 2009-10-10
30676 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
30677 introduces a new unit test framework, shifts directry authority
30678 addresses around to reduce the impact from recent blocking events,
30679 and fixes a few smaller bugs.
30682 - Fix several more asserts in the circuit_build_times code, for
30683 example one that causes Tor to fail to start once we have
30684 accumulated 5000 build times in the state file. Bugfixes on
30685 0.2.2.2-alpha; fixes bug 1108.
30687 o New directory authorities:
30688 - Move moria1 and Tonga to alternate IP addresses.
30691 - Log SSL state transitions at debug level during handshake, and
30692 include SSL states in error messages. This may help debug future
30693 SSL handshake issues.
30694 - Add a new "Handshake" log domain for activities that happen
30695 during the TLS handshake.
30696 - Revert to the "June 3 2009" ip-to-country file. The September one
30697 seems to have removed most US IP addresses.
30698 - Directory authorities now reject Tor relays with versions less than
30699 0.1.2.14. This step cuts out four relays from the current network,
30700 none of which are very big.
30703 - Fix a couple of smaller issues with gathering statistics. Bugfixes
30705 - Fix two memory leaks in the error case of
30706 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
30707 - Don't count one-hop circuits when we're estimating how long it
30708 takes circuits to build on average. Otherwise we'll set our circuit
30709 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
30710 - Directory authorities no longer change their opinion of, or vote on,
30711 whether a router is Running, unless they have themselves been
30712 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
30715 o Code simplifications and refactoring:
30716 - Revise our unit tests to use the "tinytest" framework, so we
30717 can run tests in their own processes, have smarter setup/teardown
30718 code, and so on. The unit test code has moved to its own
30719 subdirectory, and has been split into multiple modules.
30722 Changes in version 0.2.2.3-alpha - 2009-09-23
30723 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
30726 - Fix an overzealous assert in our new circuit build timeout code.
30727 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
30730 - If the networkstatus consensus tells us that we should use a
30731 negative circuit package window, ignore it. Otherwise we'll
30732 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
30735 Changes in version 0.2.2.2-alpha - 2009-09-21
30736 Tor 0.2.2.2-alpha introduces our latest performance improvement for
30737 clients: Tor tracks the average time it takes to build a circuit, and
30738 avoids using circuits that take too long to build. For fast connections,
30739 this feature can cut your expected latency in half. For slow or flaky
30740 connections, it could ruin your Tor experience. Let us know if it does!
30743 - Tor now tracks how long it takes to build client-side circuits
30744 over time, and adapts its timeout to local network performance.
30745 Since a circuit that takes a long time to build will also provide
30746 bad performance, we get significant latency improvements by
30747 discarding the slowest 20% of circuits. Specifically, Tor creates
30748 circuits more aggressively than usual until it has enough data
30749 points for a good timeout estimate. Implements proposal 151.
30750 We are especially looking for reports (good and bad) from users with
30751 both EDGE and broadband connections that can move from broadband
30752 to EDGE and find out if the build-time data in the .tor/state gets
30753 reset without loss of Tor usability. You should also see a notice
30754 log message telling you that Tor has reset its timeout.
30755 - Directory authorities can now vote on arbitrary integer values as
30756 part of the consensus process. This is designed to help set
30757 network-wide parameters. Implements proposal 167.
30758 - Tor now reads the "circwindow" parameter out of the consensus,
30759 and uses that value for its circuit package window rather than the
30760 default of 1000 cells. Begins the implementation of proposal 168.
30763 - Fix a remotely triggerable memory leak when a consensus document
30764 contains more than one signature from the same voter. Bugfix on
30768 - Fix an extremely rare infinite recursion bug that could occur if
30769 we tried to log a message after shutting down the log subsystem.
30770 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30771 - Fix parsing for memory or time units given without a space between
30772 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
30773 - A networkstatus vote must contain exactly one signature. Spec
30774 conformance issue. Bugfix on 0.2.0.3-alpha.
30775 - Fix an obscure bug where hidden services on 64-bit big-endian
30776 systems might mis-read the timestamp in v3 introduce cells, and
30777 refuse to connect back to the client. Discovered by "rotor".
30778 Bugfix on 0.2.1.6-alpha.
30779 - We were triggering a CLOCK_SKEW controller status event whenever
30780 we connect via the v2 connection protocol to any relay that has
30781 a wrong clock. Instead, we should only inform the controller when
30782 it's a trusted authority that claims our clock is wrong. Bugfix
30783 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30784 - We were telling the controller about CHECKING_REACHABILITY and
30785 REACHABILITY_FAILED status events whenever we launch a testing
30786 circuit or notice that one has failed. Instead, only tell the
30787 controller when we want to inform the user of overall success or
30788 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30790 - Don't warn when we're using a circuit that ends with a node
30791 excluded in ExcludeExitNodes, but the circuit is not used to access
30792 the outside world. This should help fix bug 1090, but more problems
30793 remain. Bugfix on 0.2.1.6-alpha.
30794 - Work around a small memory leak in some versions of OpenSSL that
30795 stopped the memory used by the hostname TLS extension from being
30797 - Make our 'torify' script more portable; if we have only one of
30798 'torsocks' or 'tsocks' installed, don't complain to the user;
30799 and explain our warning about tsocks better.
30802 - Add a "getinfo status/accepted-server-descriptor" controller
30803 command, which is the recommended way for controllers to learn
30804 whether our server descriptor has been successfully received by at
30805 least on directory authority. Un-recommend good-server-descriptor
30806 getinfo and status events until we have a better design for them.
30807 - Update to the "September 4 2009" ip-to-country file.
30810 Changes in version 0.2.2.1-alpha - 2009-08-26
30811 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
30812 Tor clients to bootstrap on networks where only port 80 is reachable,
30813 makes it more straightforward to support hardware crypto accelerators,
30814 and starts the groundwork for gathering stats safely at relays.
30817 - Start the process of disabling ".exit" address notation, since it
30818 can be used for a variety of esoteric application-level attacks
30819 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
30822 o New directory authorities:
30823 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30827 - New AccelName and AccelDir options add support for dynamic OpenSSL
30828 hardware crypto acceleration engines.
30829 - Tor now supports tunneling all of its outgoing connections over
30830 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
30831 configuration options. Code by Christopher Davis.
30834 - Send circuit or stream sendme cells when our window has decreased
30835 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30836 by Karsten when testing the "reduce circuit window" performance
30837 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30838 before the release of Tor 0.0.0. This is the new winner of the
30841 o New options for gathering stats safely:
30842 - Directory mirrors that set "DirReqStatistics 1" write statistics
30843 about directory requests to disk every 24 hours. As compared to the
30844 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
30845 1) stats are written to disk exactly every 24 hours; 2) estimated
30846 shares of v2 and v3 requests are determined as mean values, not at
30847 the end of a measurement period; 3) unresolved requests are listed
30848 with country code '??'; 4) directories also measure download times.
30849 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
30850 number of exit streams and transferred bytes per port to disk every
30852 - Relays that set "CellStatistics 1" write statistics on how long
30853 cells spend in their circuit queues to disk every 24 hours.
30854 - Entry nodes that set "EntryStatistics 1" write statistics on the
30855 rough number and origins of connecting clients to disk every 24
30857 - Relays that write any of the above statistics to disk and set
30858 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
30859 their extra-info documents.
30862 - New --digests command-line switch to output the digests of the
30863 source files Tor was built with.
30864 - The "torify" script now uses torsocks where available.
30865 - The memarea code now uses a sentinel value at the end of each area
30866 to make sure nothing writes beyond the end of an area. This might
30867 help debug some conceivable causes of bug 930.
30868 - Time and memory units in the configuration file can now be set to
30869 fractional units. For example, "2.5 GB" is now a valid value for
30871 - Certain Tor clients (such as those behind check.torproject.org) may
30872 want to fetch the consensus in an extra early manner. To enable this
30873 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
30874 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
30875 as only certain clients who must have this information sooner should
30877 - Instead of adding the svn revision to the Tor version string, report
30878 the git commit (when we're building from a git checkout).
30881 - If any of the v3 certs we download are unparseable, we should
30882 actually notice the failure so we don't retry indefinitely. Bugfix
30883 on 0.2.0.x; reported by "rotator".
30884 - If the cached cert file is unparseable, warn but don't exit.
30885 - Fix possible segmentation fault on directory authorities. Bugfix on
30887 - When Tor fails to parse a descriptor of any kind, dump it to disk.
30888 Might help diagnosing bug 1051.
30890 o Deprecated and removed features:
30891 - The controller no longer accepts the old obsolete "addr-mappings/"
30892 or "unregistered-servers-" GETINFO values.
30893 - Hidden services no longer publish version 0 descriptors, and clients
30894 do not request or use version 0 descriptors. However, the old hidden
30895 service authorities still accept and serve version 0 descriptors
30896 when contacted by older hidden services/clients.
30897 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
30898 always on; using them is necessary for correct forward-compatible
30900 - Remove support for .noconnect style addresses. Nobody was using
30901 them, and they provided another avenue for detecting Tor users
30902 via application-level web tricks.
30904 o Packaging changes:
30905 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
30906 installer bundles. See
30907 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
30908 for details of what's new in Vidalia 0.2.3.
30909 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
30910 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
30911 configuration file, rather than the old Privoxy.
30912 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
30913 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
30914 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
30915 better compatibility with OS X 10.6, aka Snow Leopard.
30916 - OS X Vidalia Bundle: The multi-package installer is now replaced
30917 by a simple drag and drop to the /Applications folder. This change
30918 occurred with the upgrade to Vidalia 0.2.3.
30921 Changes in version 0.2.1.19 - 2009-07-28
30922 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
30923 services on Tor 0.2.1.3-alpha through 0.2.1.18.
30926 - Make accessing hidden services on 0.2.1.x work right again.
30927 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
30928 part of patch provided by "optimist".
30931 - When a relay/bridge is writing out its identity key fingerprint to
30932 the "fingerprint" file and to its logs, write it without spaces. Now
30933 it will look like the fingerprints in our bridges documentation,
30934 and confuse fewer users.
30937 - Relays no longer publish a new server descriptor if they change
30938 their MaxAdvertisedBandwidth config option but it doesn't end up
30939 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
30940 fixes bug 1026. Patch from Sebastian.
30941 - Avoid leaking memory every time we get a create cell but we have
30942 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
30943 fixes bug 1034. Reported by BarkerJr.
30946 Changes in version 0.2.1.18 - 2009-07-24
30947 Tor 0.2.1.18 lays the foundations for performance improvements,
30948 adds status events to help users diagnose bootstrap problems, adds
30949 optional authentication/authorization for hidden services, fixes a
30950 variety of potential anonymity problems, and includes a huge pile of
30951 other features and bug fixes.
30954 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
30957 Changes in version 0.2.1.17-rc - 2009-07-07
30958 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
30959 candidate for the 0.2.1.x series. It lays the groundwork for further
30960 client performance improvements, and also fixes a big bug with directory
30961 authorities that were causing them to assign Guard and Stable flags
30964 The Windows bundles also finally include the geoip database that we
30965 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
30966 should actually install Torbutton rather than giving you a cryptic
30967 failure message (oops).
30970 - Clients now use the bandwidth values in the consensus, rather than
30971 the bandwidth values in each relay descriptor. This approach opens
30972 the door to more accurate bandwidth estimates once the directory
30973 authorities start doing active measurements. Implements more of
30977 - When Tor clients restart after 1-5 days, they discard all their
30978 cached descriptors as too old, but they still use the cached
30979 consensus document. This approach is good for robustness, but
30980 bad for performance: since they don't know any bandwidths, they
30981 end up choosing at random rather than weighting their choice by
30982 speed. Fixed by the above feature of putting bandwidths in the
30983 consensus. Bugfix on 0.2.0.x.
30984 - Directory authorities were neglecting to mark relays down in their
30985 internal histories if the relays fall off the routerlist without
30986 ever being found unreachable. So there were relays in the histories
30987 that haven't been seen for eight months, and are listed as being
30988 up for eight months. This wreaked havoc on the "median wfu"
30989 and "median mtbf" calculations, in turn making Guard and Stable
30990 flags very wrong, hurting network performance. Fixes bugs 696 and
30991 969. Bugfix on 0.2.0.6-alpha.
30994 - Serve the DirPortFrontPage page even when we have been approaching
30995 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
30996 - The control port would close the connection before flushing long
30997 replies, such as the network consensus, if a QUIT command was issued
30998 before the reply had completed. Now, the control port flushes all
30999 pending replies before closing the connection. Also fixed a spurious
31000 warning when a QUIT command is issued after a malformed or rejected
31001 AUTHENTICATE command, but before the connection was closed. Patch
31002 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
31003 - When we can't find an intro key for a v2 hidden service descriptor,
31004 fall back to the v0 hidden service descriptor and log a bug message.
31005 Workaround for bug 1024.
31006 - Fix a log message that did not respect the SafeLogging option.
31010 - If we're a relay and we change our IP address, be more verbose
31011 about the reason that made us change. Should help track down
31012 further bugs for relays on dynamic IP addresses.
31015 Changes in version 0.2.0.35 - 2009-06-24
31017 - Avoid crashing in the presence of certain malformed descriptors.
31018 Found by lark, and by automated fuzzing.
31019 - Fix an edge case where a malicious exit relay could convince a
31020 controller that the client's DNS question resolves to an internal IP
31021 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31024 - Finally fix the bug where dynamic-IP relays disappear when their
31025 IP address changes: directory mirrors were mistakenly telling
31026 them their old address if they asked via begin_dir, so they
31027 never got an accurate answer about their new address, so they
31028 just vanished after a day. For belt-and-suspenders, relays that
31029 don't set Address in their config now avoid using begin_dir for
31030 all direct connections. Should fix bugs 827, 883, and 900.
31031 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31032 that would occur on some exit nodes when DNS failures and timeouts
31033 occurred in certain patterns. Fix for bug 957.
31036 - When starting with a cache over a few days old, do not leak
31037 memory for the obsolete router descriptors in it. Bugfix on
31038 0.2.0.33; fixes bug 672.
31039 - Hidden service clients didn't use a cached service descriptor that
31040 was older than 15 minutes, but wouldn't fetch a new one either,
31041 because there was already one in the cache. Now, fetch a v2
31042 descriptor unless the same descriptor was added to the cache within
31043 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31046 Changes in version 0.2.1.16-rc - 2009-06-20
31047 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
31048 a bunch of minor bugs.
31051 - Fix an edge case where a malicious exit relay could convince a
31052 controller that the client's DNS question resolves to an internal IP
31053 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
31055 o Major performance improvements (on 0.2.0.x):
31056 - Disable and refactor some debugging checks that forced a linear scan
31057 over the whole server-side DNS cache. These accounted for over 50%
31058 of CPU time on a relatively busy exit node's gprof profile. Found
31060 - Disable some debugging checks that appeared in exit node profile
31064 - Update to the "June 3 2009" ip-to-country file.
31065 - Do not have tor-resolve automatically refuse all .onion addresses;
31066 if AutomapHostsOnResolve is set in your torrc, this will work fine.
31068 o Minor bugfixes (on 0.2.0.x):
31069 - Log correct error messages for DNS-related network errors on
31071 - Fix a race condition that could cause crashes or memory corruption
31072 when running as a server with a controller listening for log
31074 - Avoid crashing when we have a policy specified in a DirPolicy or
31075 SocksPolicy or ReachableAddresses option with ports set on it,
31076 and we re-load the policy. May fix bug 996.
31077 - Hidden service clients didn't use a cached service descriptor that
31078 was older than 15 minutes, but wouldn't fetch a new one either,
31079 because there was already one in the cache. Now, fetch a v2
31080 descriptor unless the same descriptor was added to the cache within
31081 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
31083 o Minor bugfixes (on 0.2.1.x):
31084 - Don't warn users about low port and hibernation mix when they
31085 provide a *ListenAddress directive to fix that. Bugfix on
31087 - When switching back and forth between bridge mode, do not start
31088 gathering GeoIP data until two hours have passed.
31089 - Do not complain that the user has requested an excluded node as
31090 an exit when the node is not really an exit. This could happen
31091 because the circuit was for testing, or an introduction point.
31095 Changes in version 0.2.1.15-rc - 2009-05-25
31096 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
31097 series. It fixes a major bug on fast exit relays, as well as a variety
31098 of more minor bugs.
31100 o Major bugfixes (on 0.2.0.x):
31101 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
31102 that would occur on some exit nodes when DNS failures and timeouts
31103 occurred in certain patterns. Fix for bug 957.
31105 o Minor bugfixes (on 0.2.0.x):
31106 - Actually return -1 in the error case for read_bandwidth_usage().
31107 Harmless bug, since we currently don't care about the return value
31108 anywhere. Bugfix on 0.2.0.9-alpha.
31109 - Provide a more useful log message if bug 977 (related to buffer
31110 freelists) ever reappears, and do not crash right away.
31111 - Fix an assertion failure on 64-bit platforms when we allocated
31112 memory right up to the end of a memarea, then realigned the memory
31113 one step beyond the end. Fixes a possible cause of bug 930.
31114 - Protect the count of open sockets with a mutex, so we can't
31115 corrupt it when two threads are closing or opening sockets at once.
31116 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
31117 - Don't allow a bridge to publish its router descriptor to a
31118 non-bridge directory authority. Fixes part of bug 932.
31119 - When we change to or from being a bridge, reset our counts of
31120 client usage by country. Fixes bug 932.
31121 - Fix a bug that made stream bandwidth get misreported to the
31123 - Stop using malloc_usable_size() to use more area than we had
31124 actually allocated: it was safe, but made valgrind really unhappy.
31125 - Fix a memory leak when v3 directory authorities load their keys
31126 and cert from disk. Bugfix on 0.2.0.1-alpha.
31128 o Minor bugfixes (on 0.2.1.x):
31129 - Fix use of freed memory when deciding to mark a non-addable
31130 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
31133 Changes in version 0.2.1.14-rc - 2009-04-12
31134 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
31135 series. It begins fixing some major performance problems, and also
31136 finally addresses the bug that was causing relays on dynamic IP
31137 addresses to fall out of the directory.
31140 - Clients replace entry guards that were chosen more than a few months
31141 ago. This change should significantly improve client performance,
31142 especially once more people upgrade, since relays that have been
31143 a guard for a long time are currently overloaded.
31145 o Major bugfixes (on 0.2.0):
31146 - Finally fix the bug where dynamic-IP relays disappear when their
31147 IP address changes: directory mirrors were mistakenly telling
31148 them their old address if they asked via begin_dir, so they
31149 never got an accurate answer about their new address, so they
31150 just vanished after a day. For belt-and-suspenders, relays that
31151 don't set Address in their config now avoid using begin_dir for
31152 all direct connections. Should fix bugs 827, 883, and 900.
31153 - Relays were falling out of the networkstatus consensus for
31154 part of a day if they changed their local config but the
31155 authorities discarded their new descriptor as "not sufficiently
31156 different". Now directory authorities accept a descriptor as changed
31157 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
31158 patch by Sebastian.
31159 - Avoid crashing in the presence of certain malformed descriptors.
31160 Found by lark, and by automated fuzzing.
31163 - When generating circuit events with verbose nicknames for
31164 controllers, try harder to look up nicknames for routers on a
31165 circuit. (Previously, we would look in the router descriptors we had
31166 for nicknames, but not in the consensus.) Partial fix for bug 941.
31167 - If the bridge config line doesn't specify a port, assume 443.
31168 This makes bridge lines a bit smaller and easier for users to
31170 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
31171 bytes (aka 20KB/s), to match our documentation. Also update
31172 directory authorities so they always assign the Fast flag to relays
31173 with 20KB/s of capacity. Now people running relays won't suddenly
31174 find themselves not seeing any use, if the network gets faster
31176 - Update to the "April 3 2009" ip-to-country file.
31179 - Avoid trying to print raw memory to the logs when we decide to
31180 give up on downloading a given relay descriptor. Bugfix on
31182 - In tor-resolve, when the Tor client to use is specified by
31183 <hostname>:<port>, actually use the specified port rather than
31184 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
31185 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
31186 - When starting with a cache over a few days old, do not leak
31187 memory for the obsolete router descriptors in it. Bugfix on
31189 - Avoid double-free on list of successfully uploaded hidden
31190 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
31191 - Change memarea_strndup() implementation to work even when
31192 duplicating a string at the end of a page. This bug was
31193 harmless for now, but could have meant crashes later. Fix by
31194 lark. Bugfix on 0.2.1.1-alpha.
31195 - Limit uploaded directory documents to be 16M rather than 500K.
31196 The directory authorities were refusing v3 consensus votes from
31197 other authorities, since the votes are now 504K. Fixes bug 959;
31198 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
31199 - Directory authorities should never send a 503 "busy" response to
31200 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
31204 Changes in version 0.2.1.13-alpha - 2009-03-09
31205 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
31206 cleanups. We're finally getting close to a release candidate.
31209 - Correctly update the list of which countries we exclude as
31210 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
31211 lark. Bugfix on 0.2.1.6-alpha.
31213 o Minor bugfixes (on 0.2.0.x and earlier):
31214 - Automatically detect MacOSX versions earlier than 10.4.0, and
31215 disable kqueue from inside Tor when running with these versions.
31216 We previously did this from the startup script, but that was no
31217 help to people who didn't use the startup script. Resolves bug 863.
31218 - When we had picked an exit node for a connection, but marked it as
31219 "optional", and it turned out we had no onion key for the exit,
31220 stop wanting that exit and try again. This situation may not
31221 be possible now, but will probably become feasible with proposal
31222 158. Spotted by rovv. Fixes another case of bug 752.
31223 - Clients no longer cache certificates for authorities they do not
31224 recognize. Bugfix on 0.2.0.9-alpha.
31225 - When we can't transmit a DNS request due to a network error, retry
31226 it after a while, and eventually transmit a failing response to
31227 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
31228 - If the controller claimed responsibility for a stream, but that
31229 stream never finished making its connection, it would live
31230 forever in circuit_wait state. Now we close it after SocksTimeout
31231 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
31232 - Drop begin cells to a hidden service if they come from the middle
31233 of a circuit. Patch from lark.
31234 - When we erroneously receive two EXTEND cells for the same circuit
31235 ID on the same connection, drop the second. Patch from lark.
31236 - Fix a crash that occurs on exit nodes when a nameserver request
31237 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
31238 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
31240 - Do not assume that a stack-allocated character array will be
31241 64-bit aligned on platforms that demand that uint64_t access is
31242 aligned. Possible fix for bug 604.
31243 - Parse dates and IPv4 addresses in a locale- and libc-independent
31244 manner, to avoid platform-dependent behavior on malformed input.
31245 - Build correctly when configured to build outside the main source
31246 path. Patch from Michael Gold.
31247 - We were already rejecting relay begin cells with destination port
31248 of 0. Now also reject extend cells with destination port or address
31249 of 0. Suggested by lark.
31251 o Minor bugfixes (on 0.2.1.x):
31252 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
31253 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
31254 - If we're an exit node, scrub the IP address to which we are exiting
31255 in the logs. Bugfix on 0.2.1.8-alpha.
31258 - On Linux, use the prctl call to re-enable core dumps when the user
31260 - New controller event NEWCONSENSUS that lists the networkstatus
31261 lines for every recommended relay. Now controllers like Torflow
31262 can keep up-to-date on which relays they should be using.
31263 - Update to the "February 26 2009" ip-to-country file.
31266 Changes in version 0.2.0.34 - 2009-02-08
31267 Tor 0.2.0.34 features several more security-related fixes. You should
31268 upgrade, especially if you run an exit relay (remote crash) or a
31269 directory authority (remote infinite loop), or you're on an older
31270 (pre-XP) or not-recently-patched Windows (remote exploit).
31272 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
31273 have many known flaws, and nobody should be using them. You should
31274 upgrade. If you're using a Linux or BSD and its packages are obsolete,
31275 stop using those packages and upgrade anyway.
31278 - Fix an infinite-loop bug on handling corrupt votes under certain
31279 circumstances. Bugfix on 0.2.0.8-alpha.
31280 - Fix a temporary DoS vulnerability that could be performed by
31281 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31282 - Avoid a potential crash on exit nodes when processing malformed
31283 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
31284 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31285 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31288 - Fix compilation on systems where time_t is a 64-bit integer.
31289 Patch from Matthias Drochner.
31290 - Don't consider expiring already-closed client connections. Fixes
31291 bug 893. Bugfix on 0.0.2pre20.
31294 Changes in version 0.2.1.12-alpha - 2009-02-08
31295 Tor 0.2.1.12-alpha features several more security-related fixes. You
31296 should upgrade, especially if you run an exit relay (remote crash) or
31297 a directory authority (remote infinite loop), or you're on an older
31298 (pre-XP) or not-recently-patched Windows (remote exploit). It also
31299 includes a big pile of minor bugfixes and cleanups.
31302 - Fix an infinite-loop bug on handling corrupt votes under certain
31303 circumstances. Bugfix on 0.2.0.8-alpha.
31304 - Fix a temporary DoS vulnerability that could be performed by
31305 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
31306 - Avoid a potential crash on exit nodes when processing malformed
31307 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
31310 - Let controllers actually ask for the "clients_seen" event for
31311 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
31312 reported by Matt Edman.
31313 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
31315 - Fix a bug in address parsing that was preventing bridges or hidden
31316 service targets from being at IPv6 addresses.
31317 - Solve a bug that kept hardware crypto acceleration from getting
31318 enabled when accounting was turned on. Fixes bug 907. Bugfix on
31320 - Remove a bash-ism from configure.in to build properly on non-Linux
31321 platforms. Bugfix on 0.2.1.1-alpha.
31322 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
31323 headers. Bugfix on 0.2.0.10-alpha.
31324 - Don't consider expiring already-closed client connections. Fixes
31325 bug 893. Bugfix on 0.0.2pre20.
31326 - Fix another interesting corner-case of bug 891 spotted by rovv:
31327 Previously, if two hosts had different amounts of clock drift, and
31328 one of them created a new connection with just the wrong timing,
31329 the other might decide to deprecate the new connection erroneously.
31330 Bugfix on 0.1.1.13-alpha.
31331 - Resolve a very rare crash bug that could occur when the user forced
31332 a nameserver reconfiguration during the middle of a nameserver
31333 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31334 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31335 Bugfix on 0.2.1.7-alpha.
31336 - If we're using bridges and our network goes away, be more willing
31337 to forgive our bridges and try again when we get an application
31338 request. Bugfix on 0.2.0.x.
31341 - Support platforms where time_t is 64 bits long. (Congratulations,
31342 NetBSD!) Patch from Matthias Drochner.
31343 - Add a 'getinfo status/clients-seen' controller command, in case
31344 controllers want to hear clients_seen events but connect late.
31347 - Disable GCC's strict alias optimization by default, to avoid the
31348 likelihood of its introducing subtle bugs whenever our code violates
31349 the letter of C99's alias rules.
31352 Changes in version 0.2.0.33 - 2009-01-21
31353 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
31354 useful to users. It also finally fixes a bug where a relay or client
31355 that's been off for many days would take a long time to bootstrap.
31357 This update also fixes an important security-related bug reported by
31358 Ilja van Sprundel. You should upgrade. (We'll send out more details
31359 about the bug once people have had some time to upgrade.)
31362 - Fix a heap-corruption bug that may be remotely triggerable on
31363 some platforms. Reported by Ilja van Sprundel.
31366 - When a stream at an exit relay is in state "resolving" or
31367 "connecting" and it receives an "end" relay cell, the exit relay
31368 would silently ignore the end cell and not close the stream. If
31369 the client never closes the circuit, then the exit relay never
31370 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
31371 reported by "wood".
31372 - When sending CREATED cells back for a given circuit, use a 64-bit
31373 connection ID to find the right connection, rather than an addr:port
31374 combination. Now that we can have multiple OR connections between
31375 the same ORs, it is no longer possible to use addr:port to uniquely
31376 identify a connection.
31377 - Bridge relays that had DirPort set to 0 would stop fetching
31378 descriptors shortly after startup, and then briefly resume
31379 after a new bandwidth test and/or after publishing a new bridge
31380 descriptor. Bridge users that try to bootstrap from them would
31381 get a recent networkstatus but would get descriptors from up to
31382 18 hours earlier, meaning most of the descriptors were obsolete
31383 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31384 - Prevent bridge relays from serving their 'extrainfo' document
31385 to anybody who asks, now that extrainfo docs include potentially
31386 sensitive aggregated client geoip summaries. Bugfix on
31388 - If the cached networkstatus consensus is more than five days old,
31389 discard it rather than trying to use it. In theory it could be
31390 useful because it lists alternate directory mirrors, but in practice
31391 it just means we spend many minutes trying directory mirrors that
31392 are long gone from the network. Also discard router descriptors as
31393 we load them if they are more than five days old, since the onion
31394 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
31397 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31398 could make gcc generate non-functional binary search code. Bugfix
31400 - Build correctly on platforms without socklen_t.
31401 - Compile without warnings on solaris.
31402 - Avoid potential crash on internal error during signature collection.
31403 Fixes bug 864. Patch from rovv.
31404 - Correct handling of possible malformed authority signing key
31405 certificates with internal signature types. Fixes bug 880.
31406 Bugfix on 0.2.0.3-alpha.
31407 - Fix a hard-to-trigger resource leak when logging credential status.
31409 - When we can't initialize DNS because the network is down, do not
31410 automatically stop Tor from starting. Instead, we retry failed
31411 dns_init() every 10 minutes, and change the exit policy to reject
31412 *:* until one succeeds. Fixes bug 691.
31413 - Use 64 bits instead of 32 bits for connection identifiers used with
31414 the controller protocol, to greatly reduce risk of identifier reuse.
31415 - When we're choosing an exit node for a circuit, and we have
31416 no pending streams, choose a good general exit rather than one that
31417 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31418 - Fix another case of assuming, when a specific exit is requested,
31419 that we know more than the user about what hosts it allows.
31420 Fixes one case of bug 752. Patch from rovv.
31421 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31422 seconds. Warn the user if lower values are given in the
31423 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31424 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31425 user if lower values are given in the configuration. Bugfix on
31426 0.1.1.17-rc. Patch by Sebastian.
31427 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
31428 the cache because we already had a v0 descriptor with the same ID.
31429 Bugfix on 0.2.0.18-alpha.
31430 - Fix a race condition when freeing keys shared between main thread
31431 and CPU workers that could result in a memory leak. Bugfix on
31432 0.1.0.1-rc. Fixes bug 889.
31433 - Send a valid END cell back when a client tries to connect to a
31434 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31435 840. Patch from rovv.
31436 - Check which hops rendezvous stream cells are associated with to
31437 prevent possible guess-the-streamid injection attacks from
31438 intermediate hops. Fixes another case of bug 446. Based on patch
31440 - If a broken client asks a non-exit router to connect somewhere,
31441 do not even do the DNS lookup before rejecting the connection.
31442 Fixes another case of bug 619. Patch from rovv.
31443 - When a relay gets a create cell it can't decrypt (e.g. because it's
31444 using the wrong onion key), we were dropping it and letting the
31445 client time out. Now actually answer with a destroy cell. Fixes
31446 bug 904. Bugfix on 0.0.2pre8.
31448 o Minor bugfixes (hidden services):
31449 - Do not throw away existing introduction points on SIGHUP. Bugfix on
31450 0.0.6pre1. Patch by Karsten. Fixes bug 874.
31453 - Report the case where all signatures in a detached set are rejected
31454 differently than the case where there is an error handling the
31456 - When we realize that another process has modified our cached
31457 descriptors, print out a more useful error message rather than
31458 triggering an assertion. Fixes bug 885. Patch from Karsten.
31459 - Implement the 0x20 hack to better resist DNS poisoning: set the
31460 case on outgoing DNS requests randomly, and reject responses that do
31461 not match the case correctly. This logic can be disabled with the
31462 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31463 of servers that do not reliably preserve case in replies. See
31464 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31466 - Check DNS replies for more matching fields to better resist DNS
31468 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31469 compress cells, which are basically all encrypted, compressed, or
31473 Changes in version 0.2.1.11-alpha - 2009-01-20
31474 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
31475 week it will take a long time to bootstrap again" bug. It also fixes
31476 an important security-related bug reported by Ilja van Sprundel. You
31477 should upgrade. (We'll send out more details about the bug once people
31478 have had some time to upgrade.)
31481 - Fix a heap-corruption bug that may be remotely triggerable on
31482 some platforms. Reported by Ilja van Sprundel.
31485 - Discard router descriptors as we load them if they are more than
31486 five days old. Otherwise if Tor is off for a long time and then
31487 starts with cached descriptors, it will try to use the onion
31488 keys in those obsolete descriptors when building circuits. Bugfix
31489 on 0.2.0.x. Fixes bug 887.
31492 - Try to make sure that the version of Libevent we're running with
31493 is binary-compatible with the one we built with. May address bug
31495 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
31496 for bug 905. Bugfix on 0.2.1.7-alpha.
31497 - Add a new --enable-local-appdata configuration switch to change
31498 the default location of the datadir on win32 from APPDATA to
31499 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
31500 entirely. Patch from coderman.
31503 - Make outbound DNS packets respect the OutboundBindAddress setting.
31504 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
31505 - When our circuit fails at the first hop (e.g. we get a destroy
31506 cell back), avoid using that OR connection anymore, and also
31507 tell all the one-hop directory requests waiting for it that they
31508 should fail. Bugfix on 0.2.1.3-alpha.
31509 - In the torify(1) manpage, mention that tsocks will leak your
31513 Changes in version 0.2.1.10-alpha - 2009-01-06
31514 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
31515 would make the bridge relay not so useful if it had DirPort set to 0,
31516 and one that could let an attacker learn a little bit of information
31517 about the bridge's users), and a bug that would cause your Tor relay
31518 to ignore a circuit create request it can't decrypt (rather than reply
31519 with an error). It also fixes a wide variety of other bugs.
31522 - If the cached networkstatus consensus is more than five days old,
31523 discard it rather than trying to use it. In theory it could
31524 be useful because it lists alternate directory mirrors, but in
31525 practice it just means we spend many minutes trying directory
31526 mirrors that are long gone from the network. Helps bug 887 a bit;
31528 - Bridge relays that had DirPort set to 0 would stop fetching
31529 descriptors shortly after startup, and then briefly resume
31530 after a new bandwidth test and/or after publishing a new bridge
31531 descriptor. Bridge users that try to bootstrap from them would
31532 get a recent networkstatus but would get descriptors from up to
31533 18 hours earlier, meaning most of the descriptors were obsolete
31534 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31535 - Prevent bridge relays from serving their 'extrainfo' document
31536 to anybody who asks, now that extrainfo docs include potentially
31537 sensitive aggregated client geoip summaries. Bugfix on
31541 - New controller event "clients_seen" to report a geoip-based summary
31542 of which countries we've seen clients from recently. Now controllers
31543 like Vidalia can show bridge operators that they're actually making
31545 - Build correctly against versions of OpenSSL 0.9.8 or later built
31546 without support for deprecated functions.
31547 - Update to the "December 19 2008" ip-to-country file.
31549 o Minor bugfixes (on 0.2.0.x):
31550 - Authorities now vote for the Stable flag for any router whose
31551 weighted MTBF is at least 5 days, regardless of the mean MTBF.
31552 - Do not remove routers as too old if we do not have any consensus
31553 document. Bugfix on 0.2.0.7-alpha.
31554 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31555 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31556 - When an exit relay resolves a stream address to a local IP address,
31557 do not just keep retrying that same exit relay over and
31558 over. Instead, just close the stream. Addresses bug 872. Bugfix
31559 on 0.2.0.32. Patch from rovv.
31560 - If a hidden service sends us an END cell, do not consider
31561 retrying the connection; just close it. Patch from rovv.
31562 - When we made bridge authorities stop serving bridge descriptors over
31563 unencrypted links, we also broke DirPort reachability testing for
31564 bridges. So bridges with a non-zero DirPort were printing spurious
31565 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
31566 - When a relay gets a create cell it can't decrypt (e.g. because it's
31567 using the wrong onion key), we were dropping it and letting the
31568 client time out. Now actually answer with a destroy cell. Fixes
31569 bug 904. Bugfix on 0.0.2pre8.
31570 - Squeeze 2-5% out of client performance (according to oprofile) by
31571 improving the implementation of some policy-manipulation functions.
31573 o Minor bugfixes (on 0.2.1.x):
31574 - Make get_interface_address() function work properly again; stop
31575 guessing the wrong parts of our address as our address.
31576 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
31577 send on that circuit. Otherwise we might violate the proposal-110
31578 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
31580 - When we're sending non-EXTEND cells to the first hop in a circuit,
31581 for example to use an encrypted directory connection, we don't need
31582 to use RELAY_EARLY cells: the first hop knows what kind of cell
31583 it is, and nobody else can even see the cell type. Conserving
31584 RELAY_EARLY cells makes it easier to cannibalize circuits like
31586 - Stop logging nameserver addresses in reverse order.
31587 - If we are retrying a directory download slowly over and over, do
31588 not automatically give up after the 254th failure. Bugfix on
31590 - Resume reporting accurate "stream end" reasons to the local control
31591 port. They were lost in the changes for Proposal 148. Bugfix on
31594 o Deprecated and removed features:
31595 - The old "tor --version --version" command, which would print out
31596 the subversion "Id" of most of the source files, is now removed. It
31597 turned out to be less useful than we'd expected, and harder to
31600 o Code simplifications and refactoring:
31601 - Change our header file guard macros to be less likely to conflict
31602 with system headers. Adam Langley noticed that we were conflicting
31603 with log.h on Android.
31604 - Tool-assisted documentation cleanup. Nearly every function or
31605 static variable in Tor should have its own documentation now.
31608 Changes in version 0.2.1.9-alpha - 2008-12-25
31609 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
31611 o New directory authorities:
31612 - gabelmoo (the authority run by Karsten Loesing) now has a new
31616 - Never use a connection with a mismatched address to extend a
31617 circuit, unless that connection is canonical. A canonical
31618 connection is one whose address is authenticated by the router's
31619 identity key, either in a NETINFO cell or in a router descriptor.
31620 - Avoid a possible memory corruption bug when receiving hidden service
31621 descriptors. Bugfix on 0.2.1.6-alpha.
31624 - Fix a logic error that would automatically reject all but the first
31625 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
31626 part of bug 813/868. Bug spotted by coderman.
31627 - When a stream at an exit relay is in state "resolving" or
31628 "connecting" and it receives an "end" relay cell, the exit relay
31629 would silently ignore the end cell and not close the stream. If
31630 the client never closes the circuit, then the exit relay never
31631 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
31632 reported by "wood".
31633 - When we can't initialize DNS because the network is down, do not
31634 automatically stop Tor from starting. Instead, retry failed
31635 dns_init() every 10 minutes, and change the exit policy to reject
31636 *:* until one succeeds. Fixes bug 691.
31639 - Give a better error message when an overzealous init script says
31640 "sudo -u username tor --user username". Makes Bug 882 easier for
31642 - When a directory authority gives us a new guess for our IP address,
31643 log which authority we used. Hopefully this will help us debug
31644 the recent complaints about bad IP address guesses.
31645 - Detect svn revision properly when we're using git-svn.
31646 - Try not to open more than one descriptor-downloading connection
31647 to an authority at once. This should reduce load on directory
31648 authorities. Fixes bug 366.
31649 - Add cross-certification to newly generated certificates, so that
31650 a signing key is enough information to look up a certificate.
31651 Partial implementation of proposal 157.
31652 - Start serving certificates by <identity digest, signing key digest>
31653 pairs. Partial implementation of proposal 157.
31654 - Clients now never report any stream end reason except 'MISC'.
31655 Implements proposal 148.
31656 - On platforms with a maximum syslog string length, truncate syslog
31657 messages to that length ourselves, rather than relying on the
31658 system to do it for us.
31659 - Optimize out calls to time(NULL) that occur for every IO operation,
31660 or for every cell. On systems where time() is a slow syscall,
31661 this fix will be slightly helpful.
31662 - Exit servers can now answer resolve requests for ip6.arpa addresses.
31663 - When we download a descriptor that we then immediately (as
31664 a directory authority) reject, do not retry downloading it right
31665 away. Should save some bandwidth on authorities. Fix for bug
31666 888. Patch by Sebastian Hahn.
31667 - When a download gets us zero good descriptors, do not notify
31668 Tor that new directory information has arrived.
31669 - Avoid some nasty corner cases in the logic for marking connections
31670 as too old or obsolete or noncanonical for circuits. Partial
31673 o Minor features (controller):
31674 - New CONSENSUS_ARRIVED event to note when a new consensus has
31675 been fetched and validated.
31676 - When we realize that another process has modified our cached
31677 descriptors file, print out a more useful error message rather
31678 than triggering an assertion. Fixes bug 885. Patch from Karsten.
31679 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
31680 controllers to prevent SIGHUP from reloading the
31681 configuration. Fixes bug 856.
31684 - Resume using the correct "REASON=" stream when telling the
31685 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
31686 - When a canonical connection appears later in our internal list
31687 than a noncanonical one for a given OR ID, always use the
31688 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
31690 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31691 seconds. Warn the user if lower values are given in the
31692 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31693 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31694 user if lower values are given in the configuration. Bugfix on
31695 0.1.1.17-rc. Patch by Sebastian.
31696 - Fix a race condition when freeing keys shared between main thread
31697 and CPU workers that could result in a memory leak. Bugfix on
31698 0.1.0.1-rc. Fixes bug 889.
31700 o Minor bugfixes (hidden services):
31701 - Do not throw away existing introduction points on SIGHUP (bugfix on
31702 0.0.6pre1); also, do not stall hidden services because we're
31703 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
31704 by John Brooks. Patch by Karsten. Fixes bug 874.
31705 - Fix a memory leak when we decline to add a v2 rendezvous
31706 descriptor to the cache because we already had a v0 descriptor
31707 with the same ID. Bugfix on 0.2.0.18-alpha.
31709 o Deprecated and removed features:
31710 - RedirectExits has been removed. It was deprecated since
31712 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
31713 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
31714 - Cell pools are now always enabled; --disable-cell-pools is ignored.
31716 o Code simplifications and refactoring:
31717 - Rename the confusing or_is_obsolete field to the more appropriate
31718 is_bad_for_new_circs, and move it to or_connection_t where it
31720 - Move edge-only flags from connection_t to edge_connection_t: not
31721 only is this better coding, but on machines of plausible alignment,
31722 it should save 4-8 bytes per connection_t. "Every little bit helps."
31723 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
31724 for consistency; keep old option working for backward compatibility.
31725 - Simplify the code for finding connections to use for a circuit.
31728 Changes in version 0.2.1.8-alpha - 2008-12-08
31729 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
31730 builds better on unusual platforms like Solaris and old OS X, and
31731 fixes a variety of other issues.
31734 - New DirPortFrontPage option that takes an html file and publishes
31735 it as "/" on the DirPort. Now relay operators can provide a
31736 disclaimer without needing to set up a separate webserver. There's
31737 a sample disclaimer in contrib/tor-exit-notice.html.
31740 - When the client is choosing entry guards, now it selects at most
31741 one guard from a given relay family. Otherwise we could end up with
31742 all of our entry points into the network run by the same operator.
31743 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
31746 - Fix a DOS opportunity during the voting signature collection process
31747 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31748 - Fix a possible segfault when establishing an exit connection. Bugfix
31752 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
31754 - Made Tor a little less aggressive about deleting expired
31755 certificates. Partial fix for bug 854.
31756 - Stop doing unaligned memory access that generated bus errors on
31757 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
31758 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
31759 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
31760 - Make USR2 log-level switch take effect immediately. Bugfix on
31762 - If one win32 nameserver fails to get added, continue adding the
31763 rest, and don't automatically fail.
31764 - Use fcntl() for locking when flock() is not available. Should fix
31765 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
31766 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31767 could make gcc generate non-functional binary search code. Bugfix
31769 - Build correctly on platforms without socklen_t.
31770 - Avoid potential crash on internal error during signature collection.
31771 Fixes bug 864. Patch from rovv.
31772 - Do not use C's stdio library for writing to log files. This will
31773 improve logging performance by a minute amount, and will stop
31774 leaking fds when our disk is full. Fixes bug 861.
31775 - Stop erroneous use of O_APPEND in cases where we did not in fact
31776 want to re-seek to the end of a file before every last write().
31777 - Correct handling of possible malformed authority signing key
31778 certificates with internal signature types. Fixes bug 880. Bugfix
31780 - Fix a hard-to-trigger resource leak when logging credential status.
31784 - Directory mirrors no longer fetch the v1 directory or
31785 running-routers files. They are obsolete, and nobody asks for them
31786 anymore. This is the first step to making v1 authorities obsolete.
31788 o Minor features (controller):
31789 - Return circuit purposes in response to GETINFO circuit-status. Fixes
31793 Changes in version 0.2.0.32 - 2008-11-20
31794 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
31795 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31796 a smaller security flaw that might allow an attacker to access local
31797 services, further improves hidden service performance, and fixes a
31798 variety of other issues.
31801 - The "User" and "Group" config options did not clear the
31802 supplementary group entries for the Tor process. The "User" option
31803 is now more robust, and we now set the groups to the specified
31804 user's primary group. The "Group" option is now ignored. For more
31805 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31806 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31807 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
31808 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31809 consistently obeyed: if an exit relay refuses a stream because its
31810 exit policy doesn't allow it, we would remember what IP address
31811 the relay said the destination address resolves to, even if it's
31812 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31815 - Fix a DOS opportunity during the voting signature collection process
31816 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31818 o Major bugfixes (hidden services):
31819 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31820 we were failing the whole hidden service request when the v0
31821 descriptor fetch fails, even if the v2 fetch is still pending and
31822 might succeed. Similarly, if the last v2 fetch fails, we were
31823 failing the whole hidden service request even if a v0 fetch is
31824 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31825 - When extending a circuit to a hidden service directory to upload a
31826 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31827 requests failed, because the router descriptor has not been
31828 downloaded yet. In these cases, do not attempt to upload the
31829 rendezvous descriptor, but wait until the router descriptor is
31830 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
31831 descriptor from a hidden service directory for which the router
31832 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
31836 - Fix several infrequent memory leaks spotted by Coverity.
31837 - When testing for libevent functions, set the LDFLAGS variable
31838 correctly. Found by Riastradh.
31839 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
31840 bootstrapping with tunneled directory connections. Bugfix on
31841 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
31842 - When asked to connect to A.B.exit:80, if we don't know the IP for A
31843 and we know that server B rejects most-but-not all connections to
31844 port 80, we would previously reject the connection. Now, we assume
31845 the user knows what they were asking for. Fixes bug 752. Bugfix
31846 on 0.0.9rc5. Diagnosed by BarkerJr.
31847 - If we overrun our per-second write limits a little, count this as
31848 having used up our write allocation for the second, and choke
31849 outgoing directory writes. Previously, we had only counted this when
31850 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
31851 Bugfix on 0.2.0.x (??).
31852 - Remove the old v2 directory authority 'lefkada' from the default
31853 list. It has been gone for many months.
31854 - Stop doing unaligned memory access that generated bus errors on
31855 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
31856 - Make USR2 log-level switch take effect immediately. Bugfix on
31859 o Minor bugfixes (controller):
31860 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
31861 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
31864 Changes in version 0.2.1.7-alpha - 2008-11-08
31865 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
31866 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31867 a smaller security flaw that might allow an attacker to access local
31868 services, adds better defense against DNS poisoning attacks on exit
31869 relays, further improves hidden service performance, and fixes a
31870 variety of other issues.
31873 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31874 consistently obeyed: if an exit relay refuses a stream because its
31875 exit policy doesn't allow it, we would remember what IP address
31876 the relay said the destination address resolves to, even if it's
31877 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31878 - The "User" and "Group" config options did not clear the
31879 supplementary group entries for the Tor process. The "User" option
31880 is now more robust, and we now set the groups to the specified
31881 user's primary group. The "Group" option is now ignored. For more
31882 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31883 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31884 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
31885 - Do not use or believe expired v3 authority certificates. Patch
31886 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
31889 - Now NodeFamily and MyFamily config options allow spaces in
31890 identity fingerprints, so it's easier to paste them in.
31891 Suggested by Lucky Green.
31892 - Implement the 0x20 hack to better resist DNS poisoning: set the
31893 case on outgoing DNS requests randomly, and reject responses that do
31894 not match the case correctly. This logic can be disabled with the
31895 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31896 of servers that do not reliably preserve case in replies. See
31897 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31899 - Preserve case in replies to DNSPort requests in order to support
31900 the 0x20 hack for resisting DNS poisoning attacks.
31902 o Hidden service performance improvements:
31903 - When the client launches an introduction circuit, retry with a
31904 new circuit after 30 seconds rather than 60 seconds.
31905 - Launch a second client-side introduction circuit in parallel
31906 after a delay of 15 seconds (based on work by Christian Wilms).
31907 - Hidden services start out building five intro circuits rather
31908 than three, and when the first three finish they publish a service
31909 descriptor using those. Now we publish our service descriptor much
31910 faster after restart.
31913 - Minor fix in the warning messages when you're having problems
31914 bootstrapping; also, be more forgiving of bootstrap problems when
31915 we're still making incremental progress on a given bootstrap phase.
31916 - When we're choosing an exit node for a circuit, and we have
31917 no pending streams, choose a good general exit rather than one that
31918 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31919 - Send a valid END cell back when a client tries to connect to a
31920 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31921 840. Patch from rovv.
31922 - If a broken client asks a non-exit router to connect somewhere,
31923 do not even do the DNS lookup before rejecting the connection.
31924 Fixes another case of bug 619. Patch from rovv.
31925 - Fix another case of assuming, when a specific exit is requested,
31926 that we know more than the user about what hosts it allows.
31927 Fixes another case of bug 752. Patch from rovv.
31928 - Check which hops rendezvous stream cells are associated with to
31929 prevent possible guess-the-streamid injection attacks from
31930 intermediate hops. Fixes another case of bug 446. Based on patch
31932 - Avoid using a negative right-shift when comparing 32-bit
31933 addresses. Possible fix for bug 845 and bug 811.
31934 - Make the assert_circuit_ok() function work correctly on circuits that
31935 have already been marked for close.
31936 - Fix read-off-the-end-of-string error in unit tests when decoding
31937 introduction points.
31938 - Fix uninitialized size field for memory area allocation: may improve
31939 memory performance during directory parsing.
31940 - Treat duplicate certificate fetches as failures, so that we do
31941 not try to re-fetch an expired certificate over and over and over.
31942 - Do not say we're fetching a certificate when we'll in fact skip it
31943 because of a pending download.
31946 Changes in version 0.2.1.6-alpha - 2008-09-30
31947 Tor 0.2.1.6-alpha further improves performance and robustness of
31948 hidden services, starts work on supporting per-country relay selection,
31949 and fixes a variety of smaller issues.
31952 - Implement proposal 121: make it possible to build hidden services
31953 that only certain clients are allowed to connect to. This is
31954 enforced at several points, so that unauthorized clients are unable
31955 to send INTRODUCE cells to the service, or even (depending on the
31956 type of authentication) to learn introduction points. This feature
31957 raises the bar for certain kinds of active attacks against hidden
31958 services. Code by Karsten Loesing.
31959 - Relays now store and serve v2 hidden service descriptors by default,
31960 i.e., the new default value for HidServDirectoryV2 is 1. This is
31961 the last step in proposal 114, which aims to make hidden service
31962 lookups more reliable.
31963 - Start work to allow node restrictions to include country codes. The
31964 syntax to exclude nodes in a country with country code XX is
31965 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
31966 refinement to decide what config options should take priority if
31967 you ask to both use a particular node and exclude it.
31968 - Allow ExitNodes list to include IP ranges and country codes, just
31969 like the Exclude*Nodes lists. Patch from Robert Hogan.
31972 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
31973 Tor to fail to start if you had it configured to use a bridge
31974 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
31975 - When extending a circuit to a hidden service directory to upload a
31976 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31977 requests failed, because the router descriptor had not been
31978 downloaded yet. In these cases, we now wait until the router
31979 descriptor is downloaded, and then retry. Likewise, clients
31980 now skip over a hidden service directory if they don't yet have
31981 its router descriptor, rather than futilely requesting it and
31982 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
31984 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31985 we were failing the whole hidden service request when the v0
31986 descriptor fetch fails, even if the v2 fetch is still pending and
31987 might succeed. Similarly, if the last v2 fetch fails, we were
31988 failing the whole hidden service request even if a v0 fetch is
31989 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31990 - DNS replies need to have names matching their requests, but
31991 these names should be in the questions section, not necessarily
31992 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
31995 - Update to the "September 1 2008" ip-to-country file.
31996 - Allow ports 465 and 587 in the default exit policy again. We had
31997 rejected them in 0.1.0.15, because back in 2005 they were commonly
31998 misconfigured and ended up as spam targets. We hear they are better
31999 locked down these days.
32000 - Use a lockfile to make sure that two Tor processes are not
32001 simultaneously running with the same datadir.
32002 - Serve the latest v3 networkstatus consensus via the control
32003 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
32004 - Better logging about stability/reliability calculations on directory
32006 - Drop the requirement to have an open dir port for storing and
32007 serving v2 hidden service descriptors.
32008 - Directory authorities now serve a /tor/dbg-stability.txt URL to
32009 help debug WFU and MTBF calculations.
32010 - Implement most of Proposal 152: allow specialized servers to permit
32011 single-hop circuits, and clients to use those servers to build
32012 single-hop circuits when using a specialized controller. Patch
32013 from Josh Albrecht. Resolves feature request 768.
32014 - Add a -p option to tor-resolve for specifying the SOCKS port: some
32015 people find host:port too confusing.
32016 - Make TrackHostExit mappings expire a while after their last use, not
32017 after their creation. Patch from Robert Hogan.
32018 - Provide circuit purposes along with circuit events to the controller.
32021 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
32023 - Fixed some memory leaks -- some quite frequent, some almost
32024 impossible to trigger -- based on results from Coverity.
32025 - When testing for libevent functions, set the LDFLAGS variable
32026 correctly. Found by Riastradh.
32027 - Fix an assertion bug in parsing policy-related options; possible fix
32029 - Catch and report a few more bootstrapping failure cases when Tor
32030 fails to establish a TCP connection. Cleanup on 0.2.1.x.
32031 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
32032 bootstrapping with tunneled directory connections. Bugfix on
32033 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
32034 - When asked to connect to A.B.exit:80, if we don't know the IP for A
32035 and we know that server B rejects most-but-not all connections to
32036 port 80, we would previously reject the connection. Now, we assume
32037 the user knows what they were asking for. Fixes bug 752. Bugfix
32038 on 0.0.9rc5. Diagnosed by BarkerJr.
32039 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
32040 service directories if they have no advertised dir port. Bugfix
32042 - If we overrun our per-second write limits a little, count this as
32043 having used up our write allocation for the second, and choke
32044 outgoing directory writes. Previously, we had only counted this when
32045 we had met our limits precisely. Fixes bug 824. Patch by rovv.
32046 Bugfix on 0.2.0.x (??).
32047 - Avoid a "0 divided by 0" calculation when calculating router uptime
32048 at directory authorities. Bugfix on 0.2.0.8-alpha.
32049 - Make DNS resolved controller events into "CLOSED", not
32050 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
32052 - Fix a bug where an unreachable relay would establish enough
32053 reachability testing circuits to do a bandwidth test -- if
32054 we already have a connection to the middle hop of the testing
32055 circuit, then it could establish the last hop by using the existing
32056 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
32057 circuits no longer use entry guards in 0.2.1.3-alpha.
32058 - If we have correct permissions on $datadir, we complain to stdout
32059 and fail to start. But dangerous permissions on
32060 $datadir/cached-status/ would cause us to open a log and complain
32061 there. Now complain to stdout and fail to start in both cases. Fixes
32062 bug 820, reported by seeess.
32063 - Remove the old v2 directory authority 'lefkada' from the default
32064 list. It has been gone for many months.
32066 o Code simplifications and refactoring:
32067 - Revise the connection_new functions so that a more typesafe variant
32068 exists. This will work better with Coverity, and let us find any
32069 actual mistakes we're making here.
32070 - Refactor unit testing logic so that dmalloc can be used sensibly
32071 with unit tests to check for memory leaks.
32072 - Move all hidden-service related fields from connection and circuit
32073 structure to substructures: this way they won't eat so much memory.
32076 Changes in version 0.2.0.31 - 2008-09-03
32077 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
32078 a big bug we're seeing where in rare cases traffic from one Tor stream
32079 gets mixed into another stream, and fixes a variety of smaller issues.
32082 - Make sure that two circuits can never exist on the same connection
32083 with the same circuit ID, even if one is marked for close. This
32084 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
32085 - Relays now reject risky extend cells: if the extend cell includes
32086 a digest of all zeroes, or asks to extend back to the relay that
32087 sent the extend cell, tear down the circuit. Ideas suggested
32089 - If not enough of our entry guards are available so we add a new
32090 one, we might use the new one even if it overlapped with the
32091 current circuit's exit relay (or its family). Anonymity bugfix
32092 pointed out by rovv.
32095 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32096 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32097 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32098 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32099 - Pick size of default geoip filename string correctly on windows.
32100 Fixes bug 806. Bugfix on 0.2.0.30.
32101 - Make the autoconf script accept the obsolete --with-ssl-dir
32102 option as an alias for the actually-working --with-openssl-dir
32103 option. Fix the help documentation to recommend --with-openssl-dir.
32104 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32105 - When using the TransPort option on OpenBSD, and using the User
32106 option to change UID and drop privileges, make sure to open
32107 /dev/pf before dropping privileges. Fixes bug 782. Patch from
32108 Christopher Davis. Bugfix on 0.1.2.1-alpha.
32109 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32110 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32111 on the client side when connecting to a hidden service. Bugfix
32112 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32113 - When closing an application-side connection because its circuit is
32114 getting torn down, generate the stream event correctly. Bugfix on
32115 0.1.2.x. Anonymous patch.
32118 Changes in version 0.2.1.5-alpha - 2008-08-31
32119 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
32120 in a lot of the infrastructure for adding authorization to hidden
32121 services, lays the groundwork for having clients read their load
32122 balancing information out of the networkstatus consensus rather than
32123 the individual router descriptors, addresses two potential anonymity
32124 issues, and fixes a variety of smaller issues.
32127 - Convert many internal address representations to optionally hold
32129 - Generate and accept IPv6 addresses in many protocol elements.
32130 - Make resolver code handle nameservers located at ipv6 addresses.
32131 - Begin implementation of proposal 121 ("Client authorization for
32132 hidden services"): configure hidden services with client
32133 authorization, publish descriptors for them, and configure
32134 authorization data for hidden services at clients. The next
32135 step is to actually access hidden services that perform client
32137 - More progress toward proposal 141: Network status consensus
32138 documents and votes now contain bandwidth information for each
32139 router and a summary of that router's exit policy. Eventually this
32140 will be used by clients so that they do not have to download every
32141 known descriptor before building circuits.
32143 o Major bugfixes (on 0.2.0.x and before):
32144 - When sending CREATED cells back for a given circuit, use a 64-bit
32145 connection ID to find the right connection, rather than an addr:port
32146 combination. Now that we can have multiple OR connections between
32147 the same ORs, it is no longer possible to use addr:port to uniquely
32148 identify a connection.
32149 - Relays now reject risky extend cells: if the extend cell includes
32150 a digest of all zeroes, or asks to extend back to the relay that
32151 sent the extend cell, tear down the circuit. Ideas suggested
32153 - If not enough of our entry guards are available so we add a new
32154 one, we might use the new one even if it overlapped with the
32155 current circuit's exit relay (or its family). Anonymity bugfix
32156 pointed out by rovv.
32159 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
32160 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
32161 - When using the TransPort option on OpenBSD, and using the User
32162 option to change UID and drop privileges, make sure to open /dev/pf
32163 before dropping privileges. Fixes bug 782. Patch from Christopher
32164 Davis. Bugfix on 0.1.2.1-alpha.
32165 - Correctly detect the presence of the linux/netfilter_ipv4.h header
32166 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
32167 - Add a missing safe_str() call for a debug log message.
32168 - Use 64 bits instead of 32 bits for connection identifiers used with
32169 the controller protocol, to greatly reduce risk of identifier reuse.
32170 - Make the autoconf script accept the obsolete --with-ssl-dir
32171 option as an alias for the actually-working --with-openssl-dir
32172 option. Fix the help documentation to recommend --with-openssl-dir.
32173 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
32176 - Rate-limit too-many-sockets messages: when they happen, they happen
32177 a lot. Resolves bug 748.
32178 - Resist DNS poisoning a little better by making sure that names in
32179 answer sections match.
32180 - Print the SOCKS5 error message string as well as the error code
32181 when a tor-resolve request fails. Patch from Jacob.
32184 Changes in version 0.2.1.4-alpha - 2008-08-04
32185 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
32188 - The address part of exit policies was not correctly written
32189 to router descriptors. This generated router descriptors that failed
32190 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
32192 - Tor triggered a false assert when extending a circuit to a relay
32193 but we already have a connection open to that relay. Noticed by
32194 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
32197 - Fix a hidden service logging bug: in some edge cases, the router
32198 descriptor of a previously picked introduction point becomes
32199 obsolete and we need to give up on it rather than continually
32200 complaining that it has become obsolete. Observed by xiando. Bugfix
32203 o Removed features:
32204 - Take out the TestVia config option, since it was a workaround for
32205 a bug that was fixed in Tor 0.1.1.21.
32208 Changes in version 0.2.1.3-alpha - 2008-08-03
32209 Tor 0.2.1.3-alpha implements most of the pieces to prevent
32210 infinite-length circuit attacks (see proposal 110); fixes a bug that
32211 might cause exit relays to corrupt streams they send back; allows
32212 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
32213 ExcludeExitNodes config options; and fixes a big pile of bugs.
32215 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32216 - Send a bootstrap problem "warn" event on the first problem if the
32217 reason is NO_ROUTE (that is, our network is down).
32220 - Implement most of proposal 110: The first K cells to be sent
32221 along a circuit are marked as special "early" cells; only K "early"
32222 cells will be allowed. Once this code is universal, we can block
32223 certain kinds of DOS attack by requiring that EXTEND commands must
32224 be sent using an "early" cell.
32227 - Try to attach connections immediately upon receiving a RENDEZVOUS2
32228 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
32229 on the client side when connecting to a hidden service. Bugfix
32230 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
32231 - Ensure that two circuits can never exist on the same connection
32232 with the same circuit ID, even if one is marked for close. This
32233 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
32236 - When relays do their initial bandwidth measurement, don't limit
32237 to just our entry guards for the test circuits. Otherwise we tend
32238 to have multiple test circuits going through a single entry guard,
32239 which makes our bandwidth test less accurate. Fixes part of bug 654;
32240 patch contributed by Josh Albrecht.
32241 - Add an ExcludeExitNodes option so users can list a set of nodes
32242 that should be be excluded from the exit node position, but
32243 allowed elsewhere. Implements proposal 151.
32244 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
32245 ExcludeNodes and ExcludeExitNodes lists.
32246 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
32247 be more efficient. Formerly it was quadratic in the number of
32248 servers; now it should be linear. Fixes bug 509.
32249 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
32250 and n_conn_id_digest fields into a separate structure that's
32251 only needed when the circuit has not yet attached to an n_conn.
32254 - Change the contrib/tor.logrotate script so it makes the new
32255 logs as "_tor:_tor" rather than the default, which is generally
32256 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
32257 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32258 warnings (occasionally), but it can also cause the compiler to
32259 eliminate error-checking code. Suggested by Peter Gutmann.
32260 - When a hidden service is giving up on an introduction point candidate
32261 that was not included in the last published rendezvous descriptor,
32262 don't reschedule publication of the next descriptor. Fixes bug 763.
32264 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
32265 HiddenServiceExcludeNodes as obsolete: they never worked properly,
32266 and nobody claims to be using them. Fixes bug 754. Bugfix on
32267 0.1.0.1-rc. Patch from Christian Wilms.
32268 - Fix a small alignment and memory-wasting bug on buffer chunks.
32271 o Minor bugfixes (controller):
32272 - When closing an application-side connection because its circuit
32273 is getting torn down, generate the stream event correctly.
32274 Bugfix on 0.1.2.x. Anonymous patch.
32276 o Removed features:
32277 - Remove all backward-compatibility code to support relays running
32278 versions of Tor so old that they no longer work at all on the
32282 Changes in version 0.2.0.30 - 2008-07-15
32284 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
32285 warnings (occasionally), but it can also cause the compiler to
32286 eliminate error-checking code. Suggested by Peter Gutmann.
32289 Changes in version 0.2.0.29-rc - 2008-07-08
32290 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
32291 hidden-service performance bugs, and fixes a bunch of smaller bugs.
32294 - If you have more than one bridge but don't know their keys,
32295 you would only launch a request for the descriptor of the first one
32296 on your list. (Tor considered launching requests for the others, but
32297 found that it already had a connection on the way for $0000...0000
32298 so it didn't open another.) Bugfix on 0.2.0.x.
32299 - If you have more than one bridge but don't know their keys, and the
32300 connection to one of the bridges failed, you would cancel all
32301 pending bridge connections. (After all, they all have the same
32302 digest.) Bugfix on 0.2.0.x.
32303 - When a hidden service was trying to establish an introduction point,
32304 and Tor had built circuits preemptively for such purposes, we
32305 were ignoring all the preemptive circuits and launching a new one
32306 instead. Bugfix on 0.2.0.14-alpha.
32307 - When a hidden service was trying to establish an introduction point,
32308 and Tor *did* manage to reuse one of the preemptively built
32309 circuits, it didn't correctly remember which one it used,
32310 so it asked for another one soon after, until there were no
32311 more preemptive circuits, at which point it launched one from
32312 scratch. Bugfix on 0.0.9.x.
32313 - Make directory servers include the X-Your-Address-Is: http header in
32314 their responses even for begin_dir conns. Now clients who only
32315 ever use begin_dir connections still have a way to learn their IP
32316 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
32319 - Fix a macro/CPP interaction that was confusing some compilers:
32320 some GCCs don't like #if/#endif pairs inside macro arguments.
32322 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
32323 Fixes bug 704; fix from Steven Murdoch.
32324 - When opening /dev/null in finish_daemonize(), do not pass the
32325 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
32326 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
32327 - Correctly detect transparent proxy support on Linux hosts that
32328 require in.h to be included before netfilter_ipv4.h. Patch
32330 - Disallow session resumption attempts during the renegotiation
32331 stage of the v2 handshake protocol. Clients should never be trying
32332 session resumption at this point, but apparently some did, in
32333 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32334 found by Geoff Goodell.
32337 Changes in version 0.2.1.2-alpha - 2008-06-20
32338 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32339 make it easier to set up your own private Tor network; fixes several
32340 big bugs with using more than one bridge relay; fixes a big bug with
32341 offering hidden services quickly after Tor starts; and uses a better
32342 API for reporting potential bootstrapping problems to the controller.
32345 - New TestingTorNetwork config option to allow adjustment of
32346 previously constant values that, while reasonable, could slow
32347 bootstrapping. Implements proposal 135. Patch from Karsten.
32350 - If you have more than one bridge but don't know their digests,
32351 you would only learn a request for the descriptor of the first one
32352 on your list. (Tor considered launching requests for the others, but
32353 found that it already had a connection on the way for $0000...0000
32354 so it didn't open another.) Bugfix on 0.2.0.x.
32355 - If you have more than one bridge but don't know their digests,
32356 and the connection to one of the bridges failed, you would cancel
32357 all pending bridge connections. (After all, they all have the
32358 same digest.) Bugfix on 0.2.0.x.
32359 - When establishing a hidden service, introduction points that
32360 originate from cannibalized circuits are completely ignored and not
32361 included in rendezvous service descriptors. This might be another
32362 reason for delay in making a hidden service available. Bugfix
32363 from long ago (0.0.9.x?)
32366 - Allow OpenSSL to use dynamic locks if it wants.
32367 - When building a consensus, do not include routers that are down.
32368 This will cut down 30% to 40% on consensus size. Implements
32370 - In directory authorities' approved-routers files, allow
32371 fingerprints with or without space.
32372 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
32373 controller can query our current bootstrap state in case it attaches
32374 partway through and wants to catch up.
32375 - Send an initial "Starting" bootstrap status event, so we have a
32376 state to start out in.
32379 - Asking for a conditional consensus at .../consensus/<fingerprints>
32380 would crash a dirserver if it did not already have a
32381 consensus. Bugfix on 0.2.1.1-alpha.
32382 - Clean up some macro/CPP interactions: some GCC versions don't like
32383 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
32386 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
32387 - Directory authorities shouldn't complain about bootstrapping
32388 problems just because they do a lot of reachability testing and
32389 some of the connection attempts fail.
32390 - Start sending "count" and "recommendation" key/value pairs in
32391 bootstrap problem status events, so the controller can hear about
32392 problems even before Tor decides they're worth reporting for sure.
32393 - If you're using bridges, generate "bootstrap problem" warnings
32394 as soon as you run out of working bridges, rather than waiting
32395 for ten failures -- which will never happen if you have less than
32397 - If we close our OR connection because there's been a circuit
32398 pending on it for too long, we were telling our bootstrap status
32399 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
32402 Changes in version 0.2.1.1-alpha - 2008-06-13
32403 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
32404 were making the Tor process bloat especially on Linux; makes our TLS
32405 handshake blend in better; sends "bootstrap phase" status events to
32406 the controller, so it can keep the user informed of progress (and
32407 problems) fetching directory information and establishing circuits;
32408 and adds a variety of smaller features.
32411 - More work on making our TLS handshake blend in: modify the list
32412 of ciphers advertised by OpenSSL in client mode to even more
32413 closely resemble a common web browser. We cheat a little so that
32414 we can advertise ciphers that the locally installed OpenSSL doesn't
32416 - Start sending "bootstrap phase" status events to the controller,
32417 so it can keep the user informed of progress fetching directory
32418 information and establishing circuits. Also inform the controller
32419 if we think we're stuck at a particular bootstrap phase. Implements
32421 - Resume using OpenSSL's RAND_poll() for better (and more portable)
32422 cross-platform entropy collection again. We used to use it, then
32423 stopped using it because of a bug that could crash systems that
32424 called RAND_poll when they had a lot of fds open. It looks like the
32425 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
32426 at startup, and to call RAND_poll() when we reseed later only if
32427 we have a non-buggy OpenSSL version.
32430 - When we choose to abandon a new entry guard because we think our
32431 older ones might be better, close any circuits pending on that
32432 new entry guard connection. This fix should make us recover much
32433 faster when our network is down and then comes back. Bugfix on
32434 0.1.2.8-beta; found by lodger.
32436 o Memory fixes and improvements:
32437 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
32438 to avoid unused RAM in buffer chunks and memory pools.
32439 - Speed up parsing and cut down on memory fragmentation by using
32440 stack-style allocations for parsing directory objects. Previously,
32441 this accounted for over 40% of allocations from within Tor's code
32442 on a typical directory cache.
32443 - Use a Bloom filter rather than a digest-based set to track which
32444 descriptors we need to keep around when we're cleaning out old
32445 router descriptors. This speeds up the computation significantly,
32446 and may reduce fragmentation.
32447 - Reduce the default smartlist size from 32 to 16; it turns out that
32448 most smartlists hold around 8-12 elements tops.
32449 - Make dumpstats() log the fullness and size of openssl-internal
32451 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
32452 patch to their OpenSSL, turn it on to save memory on servers. This
32453 patch will (with any luck) get included in a mainline distribution
32455 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32456 compress cells, which are basically all encrypted, compressed,
32460 - Stop reloading the router list from disk for no reason when we
32461 run out of reachable directory mirrors. Once upon a time reloading
32462 it would set the 'is_running' flag back to 1 for them. It hasn't
32463 done that for a long time.
32464 - In very rare situations new hidden service descriptors were
32465 published earlier than 30 seconds after the last change to the
32466 service. (We currently think that a hidden service descriptor
32467 that's been stable for 30 seconds is worth publishing.)
32470 - Allow separate log levels to be configured for different logging
32471 domains. For example, this allows one to log all notices, warnings,
32472 or errors, plus all memory management messages of level debug or
32473 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
32474 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
32475 and stop using a warning that had become unfixably verbose under
32477 - New --hush command-line option similar to --quiet. While --quiet
32478 disables all logging to the console on startup, --hush limits the
32479 output to messages of warning and error severity.
32480 - Servers support a new URL scheme for consensus downloads that
32481 allows the client to specify which authorities are trusted.
32482 The server then only sends the consensus if the client will trust
32483 it. Otherwise a 404 error is sent back. Clients use this
32484 new scheme when the server supports it (meaning it's running
32485 0.2.1.1-alpha or later). Implements proposal 134.
32486 - New configure/torrc options (--enable-geoip-stats,
32487 DirRecordUsageByCountry) to record how many IPs we've served
32488 directory info to in each country code, how many status documents
32489 total we've sent to each country code, and what share of the total
32490 directory requests we should expect to see.
32491 - Use the TLS1 hostname extension to more closely resemble browser
32493 - Lots of new unit tests.
32494 - Add a macro to implement the common pattern of iterating through
32495 two parallel lists in lockstep.
32498 Changes in version 0.2.0.28-rc - 2008-06-13
32499 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
32500 performance bug, and fixes a bunch of smaller bugs.
32503 - Fix a bug where, when we were choosing the 'end stream reason' to
32504 put in our relay end cell that we send to the exit relay, Tor
32505 clients on Windows were sometimes sending the wrong 'reason'. The
32506 anonymity problem is that exit relays may be able to guess whether
32507 the client is running Windows, thus helping partition the anonymity
32508 set. Down the road we should stop sending reasons to exit relays,
32509 or otherwise prevent future versions of this bug.
32512 - While setting up a hidden service, some valid introduction circuits
32513 were overlooked and abandoned. This might be the reason for
32514 the long delay in making a hidden service available. Bugfix on
32518 - Update to the "June 9 2008" ip-to-country file.
32519 - Run 'make test' as part of 'make dist', so we stop releasing so
32520 many development snapshots that fail their unit tests.
32523 - When we're checking if we have enough dir info for each relay
32524 to begin establishing circuits, make sure that we actually have
32525 the descriptor listed in the consensus, not just any descriptor.
32527 - Bridge relays no longer print "xx=0" in their extrainfo document
32528 for every single country code in the geoip db. Bugfix on
32530 - Only warn when we fail to load the geoip file if we were planning to
32531 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
32532 - If we change our MaxAdvertisedBandwidth and then reload torrc,
32533 Tor won't realize it should publish a new relay descriptor. Fixes
32534 bug 688, reported by mfr. Bugfix on 0.1.2.x.
32535 - When we haven't had any application requests lately, don't bother
32536 logging that we have expired a bunch of descriptors. Bugfix
32538 - Make relay cells written on a connection count as non-padding when
32539 tracking how long a connection has been in use. Bugfix on
32540 0.2.0.1-alpha. Spotted by lodger.
32541 - Fix unit tests in 0.2.0.27-rc.
32542 - Fix compile on Windows.
32545 Changes in version 0.2.0.27-rc - 2008-06-03
32546 Tor 0.2.0.27-rc adds a few features we left out of the earlier
32547 release candidates. In particular, we now include an IP-to-country
32548 GeoIP database, so controllers can easily look up what country a
32549 given relay is in, and so bridge relays can give us some sanitized
32550 summaries about which countries are making use of bridges. (See proposal
32551 126-geoip-fetching.txt for details.)
32554 - Include an IP-to-country GeoIP file in the tarball, so bridge
32555 relays can report sanitized summaries of the usage they're seeing.
32558 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
32559 Robert Hogan. Fixes the first part of bug 681.
32560 - Make bridge authorities never serve extrainfo docs.
32561 - Add support to detect Libevent versions in the 1.4.x series
32563 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
32564 - Include a new contrib/tor-exit-notice.html file that exit relay
32565 operators can put on their website to help reduce abuse queries.
32568 - When tunneling an encrypted directory connection, and its first
32569 circuit fails, do not leave it unattached and ask the controller
32570 to deal. Fixes the second part of bug 681.
32571 - Make bridge authorities correctly expire old extrainfo documents
32575 Changes in version 0.2.0.26-rc - 2008-05-13
32576 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
32577 in Debian's OpenSSL packages. All users running any 0.2.0.x version
32578 should upgrade, whether they're running Debian or not.
32580 o Major security fixes:
32581 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32582 moria1 V3 directory authorities. The old keys were generated with
32583 a vulnerable version of Debian's OpenSSL package, and must be
32584 considered compromised. Other authorities' keys were not generated
32585 with an affected version of OpenSSL.
32588 - List authority signatures as "unrecognized" based on DirServer
32589 lines, not on cert cache. Bugfix on 0.2.0.x.
32592 - Add a new V3AuthUseLegacyKey option to make it easier for
32593 authorities to change their identity keys if they have to.
32596 Changes in version 0.2.0.25-rc - 2008-04-23
32597 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
32600 - Remember to initialize threading before initializing logging.
32601 Otherwise, many BSD-family implementations will crash hard on
32602 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
32605 - Authorities correctly free policies on bad servers on
32606 exit. Fixes bug 672. Bugfix on 0.2.0.x.
32609 Changes in version 0.2.0.24-rc - 2008-04-22
32610 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
32611 v3 directory authority, makes relays with dynamic IP addresses and no
32612 DirPort notice more quickly when their IP address changes, fixes a few
32613 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
32615 o New directory authorities:
32616 - Take lefkada out of the list of v3 directory authorities, since
32617 it has been down for months.
32618 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
32622 - Detect address changes more quickly on non-directory mirror
32623 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
32625 o Minor features (security):
32626 - Reject requests for reverse-dns lookup of names that are in
32627 a private address space. Patch from lodger.
32628 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
32631 o Minor bugfixes (crashes):
32632 - Avoid a rare assert that can trigger when Tor doesn't have much
32633 directory information yet and it tries to fetch a v2 hidden
32634 service descriptor. Fixes bug 651, reported by nwf.
32635 - Initialize log mutex before initializing dmalloc. Otherwise,
32636 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
32637 - Use recursive pthread mutexes in order to avoid deadlock when
32638 logging debug-level messages to a controller. Bug spotted by nwf,
32639 bugfix on 0.2.0.16-alpha.
32641 o Minor bugfixes (resource management):
32642 - Keep address policies from leaking memory: start their refcount
32643 at 1, not 2. Bugfix on 0.2.0.16-alpha.
32644 - Free authority certificates on exit, so they don't look like memory
32645 leaks. Bugfix on 0.2.0.19-alpha.
32646 - Free static hashtables for policy maps and for TLS connections on
32647 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
32648 - Avoid allocating extra space when computing consensuses on 64-bit
32649 platforms. Bug spotted by aakova.
32651 o Minor bugfixes (misc):
32652 - Do not read the configuration file when we've only been told to
32653 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
32654 based on patch from Sebastian Hahn.
32655 - Exit relays that are used as a client can now reach themselves
32656 using the .exit notation, rather than just launching an infinite
32657 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
32658 - When attempting to open a logfile fails, tell us why.
32659 - Fix a dumb bug that was preventing us from knowing that we should
32660 preemptively build circuits to handle expected directory requests.
32661 Fixes bug 660. Bugfix on 0.1.2.x.
32662 - Warn less verbosely about clock skew from netinfo cells from
32663 untrusted sources. Fixes bug 663.
32664 - Make controller stream events for DNS requests more consistent,
32665 by adding "new stream" events for DNS requests, and removing
32666 spurious "stream closed" events" for cached reverse resolves.
32667 Patch from mwenge. Fixes bug 646.
32668 - Correctly notify one-hop connections when a circuit build has
32669 failed. Possible fix for bug 669. Found by lodger.
32672 Changes in version 0.2.0.23-rc - 2008-03-24
32673 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
32674 makes bootstrapping faster if the first directory mirror you contact
32675 is down. The bundles also include the new Vidalia 0.1.2 release.
32678 - When a tunneled directory request is made to a directory server
32679 that's down, notice after 30 seconds rather than 120 seconds. Also,
32680 fail any begindir streams that are pending on it, so they can
32681 retry elsewhere. This was causing multi-minute delays on bootstrap.
32684 Changes in version 0.2.0.22-rc - 2008-03-18
32685 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
32686 enables encrypted directory connections by default for non-relays, fixes
32687 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
32688 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
32691 - Enable encrypted directory connections by default for non-relays,
32692 so censor tools that block Tor directory connections based on their
32693 plaintext patterns will no longer work. This means Tor works in
32694 certain censored countries by default again.
32697 - Make sure servers always request certificates from clients during
32698 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
32699 - Do not enter a CPU-eating loop when a connection is closed in
32700 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
32701 diagnosed by lodger; bugfix on 0.2.0.20-rc.
32702 - Fix assertion failure that could occur when a blocked circuit
32703 became unblocked, and it had pending client DNS requests. Bugfix
32704 on 0.2.0.1-alpha. Fixes bug 632.
32706 o Minor bugfixes (on 0.1.2.x):
32707 - Generate "STATUS_SERVER" events rather than misspelled
32708 "STATUS_SEVER" events. Caught by mwenge.
32709 - When counting the number of bytes written on a TLS connection,
32710 look at the BIO actually used for writing to the network, not
32711 at the BIO used (sometimes) to buffer data for the network.
32712 Looking at different BIOs could result in write counts on the
32713 order of ULONG_MAX. Fixes bug 614.
32714 - On Windows, correctly detect errors when listing the contents of
32715 a directory. Fix from lodger.
32717 o Minor bugfixes (on 0.2.0.x):
32718 - Downgrade "sslv3 alert handshake failure" message to INFO.
32719 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
32720 left BandwidthRate and BandwidthBurst at the default, we would be
32721 silently limited by those defaults. Now raise them to match the
32722 RelayBandwidth* values.
32723 - Fix the SVK version detection logic to work correctly on a branch.
32724 - Make --enable-openbsd-malloc work correctly on Linux with alpha
32725 CPUs. Fixes bug 625.
32726 - Logging functions now check that the passed severity is sane.
32727 - Use proper log levels in the testsuite call of
32728 get_interface_address6().
32729 - When using a nonstandard malloc, do not use the platform values for
32730 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
32731 - Make the openbsd malloc code use 8k pages on alpha CPUs and
32733 - Detect mismatched page sizes when using --enable-openbsd-malloc.
32734 - Avoid double-marked-for-close warning when certain kinds of invalid
32735 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
32736 for bug 617. Bugfix on 0.2.0.1-alpha.
32737 - Make sure that the "NULL-means-reject *:*" convention is followed by
32738 all the policy manipulation functions, avoiding some possible crash
32739 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
32740 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
32741 actually works, and doesn't warn about every single reverse lookup.
32742 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
32745 - Only log guard node status when guard node status has changed.
32746 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
32747 make "INFO" 75% less verbose.
32750 Changes in version 0.2.0.21-rc - 2008-03-02
32751 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
32752 makes Tor work well with Vidalia again, fixes a rare assert bug,
32753 and fixes a pair of more minor bugs. The bundles also include Vidalia
32754 0.1.0 and Torbutton 1.1.16.
32757 - The control port should declare that it requires password auth
32758 when HashedControlSessionPassword is set too. Patch from Matt Edman;
32759 bugfix on 0.2.0.20-rc. Fixes bug 615.
32760 - Downgrade assert in connection_buckets_decrement() to a log message.
32761 This may help us solve bug 614, and in any case will make its
32762 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
32763 - We were sometimes miscounting the number of bytes read from the
32764 network, causing our rate limiting to not be followed exactly.
32765 Bugfix on 0.2.0.16-alpha. Reported by lodger.
32768 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
32769 OpenSSL versions should have been working fine. Diagnosis and patch
32770 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
32771 Bugfix on 0.2.0.20-rc.
32774 Changes in version 0.2.0.20-rc - 2008-02-24
32775 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
32776 makes more progress towards normalizing Tor's TLS handshake, makes
32777 hidden services work better again, helps relays bootstrap if they don't
32778 know their IP address, adds optional support for linking in openbsd's
32779 allocator or tcmalloc, allows really fast relays to scale past 15000
32780 sockets, and fixes a bunch of minor bugs reported by Veracode.
32783 - Enable the revised TLS handshake based on the one designed by
32784 Steven Murdoch in proposal 124, as revised in proposal 130. It
32785 includes version negotiation for OR connections as described in
32786 proposal 105. The new handshake is meant to be harder for censors
32787 to fingerprint, and it adds the ability to detect certain kinds of
32788 man-in-the-middle traffic analysis attacks. The version negotiation
32789 feature will allow us to improve Tor's link protocol more safely
32791 - Choose which bridge to use proportional to its advertised bandwidth,
32792 rather than uniformly at random. This should speed up Tor for
32793 bridge users. Also do this for people who set StrictEntryNodes.
32794 - When a TrackHostExits-chosen exit fails too many times in a row,
32795 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
32798 - Resolved problems with (re-)fetching hidden service descriptors.
32799 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
32800 and 0.2.0.19-alpha.
32801 - If we only ever used Tor for hidden service lookups or posts, we
32802 would stop building circuits and start refusing connections after
32803 24 hours, since we falsely believed that Tor was dormant. Reported
32804 by nwf; bugfix on 0.1.2.x.
32805 - Servers that don't know their own IP address should go to the
32806 authorities for their first directory fetch, even if their DirPort
32807 is off or if they don't know they're reachable yet. This will help
32808 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
32809 - When counting the number of open sockets, count not only the number
32810 of sockets we have received from the socket() call, but also
32811 the number we've gotten from accept() and socketpair(). This bug
32812 made us fail to count all sockets that we were using for incoming
32813 connections. Bugfix on 0.2.0.x.
32814 - Fix code used to find strings within buffers, when those strings
32815 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
32816 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
32817 - Add a new __HashedControlSessionPassword option for controllers
32818 to use for one-off session password hashes that shouldn't get
32819 saved to disk by SAVECONF --- Vidalia users were accumulating a
32820 pile of HashedControlPassword lines in their torrc files, one for
32821 each time they had restarted Tor and then clicked Save. Make Tor
32822 automatically convert "HashedControlPassword" to this new option but
32823 only when it's given on the command line. Partial fix for bug 586.
32825 o Minor features (performance):
32826 - Tune parameters for cell pool allocation to minimize amount of
32828 - Add OpenBSD malloc code from phk as an optional malloc
32829 replacement on Linux: some glibc libraries do very poorly
32830 with Tor's memory allocation patterns. Pass
32831 --enable-openbsd-malloc to get the replacement malloc code.
32832 - Add a --with-tcmalloc option to the configure script to link
32833 against tcmalloc (if present). Does not yet search for
32834 non-system include paths.
32835 - Stop imposing an arbitrary maximum on the number of file descriptors
32836 used for busy servers. Bug reported by Olaf Selke; patch from
32839 o Minor features (other):
32840 - When SafeLogging is disabled, log addresses along with all TLS
32842 - When building with --enable-gcc-warnings, check for whether Apple's
32843 warning "-Wshorten-64-to-32" is available.
32844 - Add a --passphrase-fd argument to the tor-gencert command for
32847 o Minor bugfixes (memory leaks and code problems):
32848 - We were leaking a file descriptor if Tor started with a zero-length
32849 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
32850 - Detect size overflow in zlib code. Reported by Justin Ferguson and
32852 - We were comparing the raw BridgePassword entry with a base64'ed
32853 version of it, when handling a "/tor/networkstatus-bridges"
32854 directory request. Now compare correctly. Noticed by Veracode.
32855 - Recover from bad tracked-since value in MTBF-history file.
32856 Should fix bug 537.
32857 - Alter the code that tries to recover from unhandled write
32858 errors, to not try to flush onto a socket that's given us
32859 unhandled errors. Bugfix on 0.1.2.x.
32860 - Make Unix controlsockets work correctly on OpenBSD. Patch from
32861 tup. Bugfix on 0.2.0.3-alpha.
32863 o Minor bugfixes (other):
32864 - If we have an extra-info document for our server, always make
32865 it available on the control port, even if we haven't gotten
32866 a copy of it from an authority yet. Patch from mwenge.
32867 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
32868 - Directory mirrors no longer include a guess at the client's IP
32869 address if the connection appears to be coming from the same /24
32870 network; it was producing too many wrong guesses.
32871 - Make the new hidden service code respect the SafeLogging setting.
32872 Bugfix on 0.2.0.x. Patch from Karsten.
32873 - When starting as an authority, do not overwrite all certificates
32874 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
32875 - If we're trying to flush the last bytes on a connection (for
32876 example, when answering a directory request), reset the
32877 time-to-give-up timeout every time we manage to write something
32878 on the socket. Bugfix on 0.1.2.x.
32879 - Change the behavior of "getinfo status/good-server-descriptor"
32880 so it doesn't return failure when any authority disappears.
32881 - Even though the man page said that "TrackHostExits ." should
32882 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
32883 - Report TLS "zero return" case as a "clean close" and "IO error"
32884 as a "close". Stop calling closes "unexpected closes": existing
32885 Tors don't use SSL_close(), so having a connection close without
32886 the TLS shutdown handshake is hardly unexpected.
32887 - Send NAMESERVER_STATUS messages for a single failed nameserver
32890 o Code simplifications and refactoring:
32891 - Remove the tor_strpartition function: its logic was confused,
32892 and it was only used for one thing that could be implemented far
32896 Changes in version 0.2.0.19-alpha - 2008-02-09
32897 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
32898 handshake, makes path selection for relays more secure and IP address
32899 guessing more robust, and generally fixes a lot of bugs in preparation
32900 for calling the 0.2.0 branch stable.
32903 - Do not include recognizeable strings in the commonname part of
32904 Tor's x509 certificates.
32907 - If we're a relay, avoid picking ourselves as an introduction point,
32908 a rendezvous point, or as the final hop for internal circuits. Bug
32909 reported by taranis and lodger. Bugfix on 0.1.2.x.
32910 - Patch from "Andrew S. Lists" to catch when we contact a directory
32911 mirror at IP address X and he says we look like we're coming from
32912 IP address X. Bugfix on 0.1.2.x.
32914 o Minor features (security):
32915 - Be more paranoid about overwriting sensitive memory on free(),
32916 as a defensive programming tactic to ensure forward secrecy.
32918 o Minor features (directory authority):
32919 - Actually validate the options passed to AuthDirReject,
32920 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
32921 - Reject router descriptors with out-of-range bandwidthcapacity or
32922 bandwidthburst values.
32924 o Minor features (controller):
32925 - Reject controller commands over 1MB in length. This keeps rogue
32926 processes from running us out of memory.
32928 o Minor features (misc):
32929 - Give more descriptive well-formedness errors for out-of-range
32930 hidden service descriptor/protocol versions.
32931 - Make memory debugging information describe more about history
32932 of cell allocation, so we can help reduce our memory use.
32934 o Deprecated features (controller):
32935 - The status/version/num-versioning and status/version/num-concurring
32936 GETINFO options are no longer useful in the v3 directory protocol:
32937 treat them as deprecated, and warn when they're used.
32940 - When our consensus networkstatus has been expired for a while, stop
32941 being willing to build circuits using it. Fixes bug 401. Bugfix
32943 - Directory caches now fetch certificates from all authorities
32944 listed in a networkstatus consensus, even when they do not
32945 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
32946 - When connecting to a bridge without specifying its key, insert
32947 the connection into the identity-to-connection map as soon as
32948 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
32949 - Detect versions of OS X where malloc_good_size() is present in the
32950 library but never actually declared. Resolves bug 587. Bugfix
32952 - Stop incorrectly truncating zlib responses to directory authority
32953 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
32954 - Stop recommending that every server operator send mail to tor-ops.
32955 Resolves bug 597. Bugfix on 0.1.2.x.
32956 - Don't trigger an assert if we start a directory authority with a
32957 private IP address (like 127.0.0.1).
32958 - Avoid possible failures when generating a directory with routers
32959 with over-long versions strings, or too many flags set. Bugfix
32961 - If an attempt to launch a DNS resolve request over the control
32962 port fails because we have overrun the limit on the number of
32963 connections, tell the controller that the request has failed.
32964 - Avoid using too little bandwidth when our clock skips a few
32965 seconds. Bugfix on 0.1.2.x.
32966 - Fix shell error when warning about missing packages in configure
32967 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
32968 - Do not become confused when receiving a spurious VERSIONS-like
32969 cell from a confused v1 client. Bugfix on 0.2.0.x.
32970 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
32971 introduction points for a hidden service have failed. Patch from
32972 Karsten Loesing. Bugfix on 0.2.0.x.
32974 o Code simplifications and refactoring:
32975 - Remove some needless generality from cpuworker code, for improved
32977 - Stop overloading the circuit_t.onionskin field for both "onionskin
32978 from a CREATE cell that we are waiting for a cpuworker to be
32979 assigned" and "onionskin from an EXTEND cell that we are going to
32980 send to an OR as soon as we are connected". Might help with bug 600.
32981 - Add an in-place version of aes_crypt() so that we can avoid doing a
32982 needless memcpy() call on each cell payload.
32985 Changes in version 0.2.0.18-alpha - 2008-01-25
32986 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
32987 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
32988 that can warn or reject connections to ports generally associated with
32989 vulnerable-plaintext protocols.
32991 o New directory authorities:
32992 - Set up dannenberg (run by CCC) as the sixth v3 directory
32996 - Fix a major memory leak when attempting to use the v2 TLS
32997 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
32998 - We accidentally enabled the under-development v2 TLS handshake
32999 code, which was causing log entries like "TLS error while
33000 renegotiating handshake". Disable it again. Resolves bug 590.
33001 - We were computing the wrong Content-Length: header for directory
33002 responses that need to be compressed on the fly, causing clients
33003 asking for those items to always fail. Bugfix on 0.2.0.x; partially
33007 - Avoid going directly to the directory authorities even if you're a
33008 relay, if you haven't found yourself reachable yet or if you've
33009 decided not to advertise your dirport yet. Addresses bug 556.
33010 - If we've gone 12 hours since our last bandwidth check, and we
33011 estimate we have less than 50KB bandwidth capacity but we could
33012 handle more, do another bandwidth test.
33013 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
33014 Tor can warn and/or refuse connections to ports commonly used with
33015 vulnerable-plaintext protocols. Currently we warn on ports 23,
33016 109, 110, and 143, but we don't reject any.
33019 - When we setconf ClientOnly to 1, close any current OR and Dir
33020 listeners. Reported by mwenge.
33021 - When we get a consensus that's been signed by more people than
33022 we expect, don't log about it; it's not a big deal. Reported
33026 - Don't answer "/tor/networkstatus-bridges" directory requests if
33027 the request isn't encrypted.
33028 - Make "ClientOnly 1" config option disable directory ports too.
33029 - Patches from Karsten Loesing to make v2 hidden services more
33030 robust: work even when there aren't enough HSDir relays available;
33031 retry when a v2 rend desc fetch fails; but don't retry if we
33032 already have a usable v0 rend desc.
33035 Changes in version 0.2.0.17-alpha - 2008-01-17
33036 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
33039 - Make the tor-gencert man page get included correctly in the tarball.
33042 Changes in version 0.2.0.16-alpha - 2008-01-17
33043 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
33044 Loesing, and generally cleans up a lot of features and minor bugs.
33046 o New directory authorities:
33047 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
33050 o Major performance improvements:
33051 - Switch our old ring buffer implementation for one more like that
33052 used by free Unix kernels. The wasted space in a buffer with 1mb
33053 of data will now be more like 8k than 1mb. The new implementation
33054 also avoids realloc();realloc(); patterns that can contribute to
33055 memory fragmentation.
33058 - Configuration files now accept C-style strings as values. This
33059 helps encode characters not allowed in the current configuration
33060 file format, such as newline or #. Addresses bug 557.
33061 - Although we fixed bug 539 (where servers would send HTTP status 503
33062 responses _and_ send a body too), there are still servers out
33063 there that haven't upgraded. Therefore, make clients parse such
33064 bodies when they receive them.
33065 - When we're not serving v2 directory information, there is no reason
33066 to actually keep any around. Remove the obsolete files and directory
33067 on startup if they are very old and we aren't going to serve them.
33069 o Minor performance improvements:
33070 - Reference-count and share copies of address policy entries; only 5%
33071 of them were actually distinct.
33072 - Never walk through the list of logs if we know that no log is
33073 interested in a given message.
33076 - When an authority has not signed a consensus, do not try to
33077 download a nonexistent "certificate with key 00000000". Bugfix
33078 on 0.2.0.x. Fixes bug 569.
33079 - Fix a rare assert error when we're closing one of our threads:
33080 use a mutex to protect the list of logs, so we never write to the
33081 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
33082 bug 575, which is kind of the revenge of bug 222.
33083 - Patch from Karsten Loesing to complain less at both the client
33084 and the relay when a relay used to have the HSDir flag but doesn't
33085 anymore, and we try to upload a hidden service descriptor.
33086 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
33088 - Do not try to download missing certificates until we have tried
33089 to check our fallback consensus. Fixes bug 583.
33090 - Make bridges round reported GeoIP stats info up to the nearest
33091 estimate, not down. Now we can distinguish between "0 people from
33092 this country" and "1 person from this country".
33093 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
33094 - Avoid possible segfault if key generation fails in
33095 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
33096 - Avoid segfault in the case where a badly behaved v2 versioning
33097 directory sends a signed networkstatus with missing client-versions.
33099 - Avoid segfaults on certain complex invocations of
33100 router_get_by_hexdigest(). Bugfix on 0.1.2.
33101 - Correct bad index on array access in parse_http_time(). Bugfix
33103 - Fix possible bug in vote generation when server versions are present
33104 but client versions are not.
33105 - Fix rare bug on REDIRECTSTREAM control command when called with no
33106 port set: it could erroneously report an error when none had
33108 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
33109 compressing large objects and find ourselves with more than 4k
33110 left over. Bugfix on 0.2.0.
33111 - Fix a small memory leak when setting up a hidden service.
33112 - Fix a few memory leaks that could in theory happen under bizarre
33114 - Fix an assert if we post a general-purpose descriptor via the
33115 control port but that descriptor isn't mentioned in our current
33116 network consensus. Bug reported by Jon McLachlan; bugfix on
33119 o Minor features (controller):
33120 - Get NS events working again. Patch from tup.
33121 - The GETCONF command now escapes and quotes configuration values
33122 that don't otherwise fit into the torrc file.
33123 - The SETCONF command now handles quoted values correctly.
33125 o Minor features (directory authorities):
33126 - New configuration options to override default maximum number of
33127 servers allowed on a single IP address. This is important for
33128 running a test network on a single host.
33129 - Actually implement the -s option to tor-gencert.
33130 - Add a manual page for tor-gencert.
33132 o Minor features (bridges):
33133 - Bridge authorities no longer serve bridge descriptors over
33134 unencrypted connections.
33136 o Minor features (other):
33137 - Add hidden services and DNSPorts to the list of things that make
33138 Tor accept that it has running ports. Change starting Tor with no
33139 ports from a fatal error to a warning; we might change it back if
33140 this turns out to confuse anybody. Fixes bug 579.
33143 Changes in version 0.1.2.19 - 2008-01-17
33144 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
33145 exit policy a little bit more conservative so it's safer to run an
33146 exit relay on a home system, and fixes a variety of smaller issues.
33149 - Exit policies now reject connections that are addressed to a
33150 relay's public (external) IP address too, unless
33151 ExitPolicyRejectPrivate is turned off. We do this because too
33152 many relays are running nearby to services that trust them based
33153 on network address.
33156 - When the clock jumps forward a lot, do not allow the bandwidth
33157 buckets to become negative. Fixes bug 544.
33158 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33159 on every successful resolve. Reported by Mike Perry.
33160 - Purge old entries from the "rephist" database and the hidden
33161 service descriptor database even when DirPort is zero.
33162 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33163 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33164 crashing or mis-answering these requests.
33165 - When we decide to send a 503 response to a request for servers, do
33166 not then also send the server descriptors: this defeats the whole
33167 purpose. Fixes bug 539.
33170 - Changing the ExitPolicyRejectPrivate setting should cause us to
33171 rebuild our server descriptor.
33172 - Fix handling of hex nicknames when answering controller requests for
33173 networkstatus by name, or when deciding whether to warn about
33174 unknown routers in a config option. (Patch from mwenge.)
33175 - Fix a couple of hard-to-trigger autoconf problems that could result
33176 in really weird results on platforms whose sys/types.h files define
33177 nonstandard integer types.
33178 - Don't try to create the datadir when running --verify-config or
33179 --hash-password. Resolves bug 540.
33180 - If we were having problems getting a particular descriptor from the
33181 directory caches, and then we learned about a new descriptor for
33182 that router, we weren't resetting our failure count. Reported
33184 - Although we fixed bug 539 (where servers would send HTTP status 503
33185 responses _and_ send a body too), there are still servers out there
33186 that haven't upgraded. Therefore, make clients parse such bodies
33187 when they receive them.
33188 - Run correctly on systems where rlim_t is larger than unsigned long.
33189 This includes some 64-bit systems.
33190 - Run correctly on platforms (like some versions of OS X 10.5) where
33191 the real limit for number of open files is OPEN_FILES, not rlim_max
33192 from getrlimit(RLIMIT_NOFILES).
33193 - Avoid a spurious free on base64 failure.
33194 - Avoid segfaults on certain complex invocations of
33195 router_get_by_hexdigest().
33196 - Fix rare bug on REDIRECTSTREAM control command when called with no
33197 port set: it could erroneously report an error when none had
33201 Changes in version 0.2.0.15-alpha - 2007-12-25
33202 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
33203 features added in 0.2.0.13-alpha.
33206 - Fix several remotely triggerable asserts based on DirPort requests
33207 for a v2 or v3 networkstatus object before we were prepared. This
33208 was particularly bad for 0.2.0.13 and later bridge relays, who
33209 would never have a v2 networkstatus and would thus always crash
33210 when used. Bugfixes on 0.2.0.x.
33211 - Estimate the v3 networkstatus size more accurately, rather than
33212 estimating it at zero bytes and giving it artificially high priority
33213 compared to other directory requests. Bugfix on 0.2.0.x.
33216 - Fix configure.in logic for cross-compilation.
33217 - When we load a bridge descriptor from the cache, and it was
33218 previously unreachable, mark it as retriable so we won't just
33219 ignore it. Also, try fetching a new copy immediately. Bugfixes
33221 - The bridge GeoIP stats were counting other relays, for example
33222 self-reachability and authority-reachability tests.
33225 - Support compilation to target iPhone; patch from cjacker huang.
33226 To build for iPhone, pass the --enable-iphone option to configure.
33229 Changes in version 0.2.0.14-alpha - 2007-12-23
33231 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
33232 without a datadirectory from a previous Tor install. Reported
33234 - Fix a crash when we fetch a descriptor that turns out to be
33235 unexpected (it used to be in our networkstatus when we started
33236 fetching it, but it isn't in our current networkstatus), and we
33237 aren't using bridges. Bugfix on 0.2.0.x.
33238 - Fix a crash when accessing hidden services: it would work the first
33239 time you use a given introduction point for your service, but
33240 on subsequent requests we'd be using garbage memory. Fixed by
33241 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
33242 - Fix a crash when we load a bridge descriptor from disk but we don't
33243 currently have a Bridge line for it in our torrc. Bugfix on
33247 - If bridge authorities set BridgePassword, they will serve a
33248 snapshot of known bridge routerstatuses from their DirPort to
33249 anybody who knows that password. Unset by default.
33252 - Make the unit tests build again.
33253 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
33254 - Make PublishServerDescriptor default to 1, so the default doesn't
33255 have to change as we invent new directory protocol versions.
33256 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
33257 be included unless sys/time.h is already included. Fixes
33258 bug 553. Bugfix on 0.2.0.x.
33259 - If we receive a general-purpose descriptor and then receive an
33260 identical bridge-purpose descriptor soon after, don't discard
33261 the next one as a duplicate.
33264 - If BridgeRelay is set to 1, then the default for
33265 PublishServerDescriptor is now "bridge" rather than "v2,v3".
33266 - If the user sets RelayBandwidthRate but doesn't set
33267 RelayBandwidthBurst, then make them equal rather than erroring out.
33270 Changes in version 0.2.0.13-alpha - 2007-12-21
33271 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
33272 Goodell, fixes many more bugs, and adds a lot of infrastructure for
33275 o New directory authorities:
33276 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
33280 - Only update guard status (usable / not usable) once we have
33281 enough directory information. This was causing us to always pick
33282 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
33283 causing us to discard all our guards on startup if we hadn't been
33284 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
33285 - Purge old entries from the "rephist" database and the hidden
33286 service descriptor databases even when DirPort is zero. Bugfix
33288 - We were ignoring our RelayBandwidthRate for the first 30 seconds
33289 after opening a circuit -- even a relayed circuit. Bugfix on
33291 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
33292 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
33293 crashing or mis-answering these types of requests.
33294 - Relays were publishing their server descriptor to v1 and v2
33295 directory authorities, but they didn't try publishing to v3-only
33296 authorities. Fix this; and also stop publishing to v1 authorities.
33298 - When we were reading router descriptors from cache, we were ignoring
33299 the annotations -- so for example we were reading in bridge-purpose
33300 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
33301 - When we decided to send a 503 response to a request for servers, we
33302 were then also sending the server descriptors: this defeats the
33303 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
33306 - Bridge relays now behave like clients with respect to time
33307 intervals for downloading new consensus documents -- otherwise they
33308 stand out. Bridge users now wait until the end of the interval,
33309 so their bridge relay will be sure to have a new consensus document.
33310 - Three new config options (AlternateDirAuthority,
33311 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
33312 user selectively replace the default directory authorities by type,
33313 rather than the all-or-nothing replacement that DirServer offers.
33314 - Tor can now be configured to read a GeoIP file from disk in one
33315 of two formats. This can be used by controllers to map IP addresses
33316 to countries. Eventually, it may support exit-by-country.
33317 - When possible, bridge relays remember which countries users
33318 are coming from, and report aggregate information in their
33319 extra-info documents, so that the bridge authorities can learn
33320 where Tor is blocked.
33321 - Bridge directory authorities now do reachability testing on the
33322 bridges they know. They provide router status summaries to the
33323 controller via "getinfo ns/purpose/bridge", and also dump summaries
33324 to a file periodically.
33325 - Stop fetching directory info so aggressively if your DirPort is
33326 on but your ORPort is off; stop fetching v2 dir info entirely.
33327 You can override these choices with the new FetchDirInfoEarly
33331 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33332 consensus documents when there are too many relays at a single
33333 IP address. Now clear it in v2 network status documents too, and
33334 also clear it in routerinfo_t when the relay is no longer listed
33335 in the relevant networkstatus document.
33336 - Don't crash if we get an unexpected value for the
33337 PublishServerDescriptor config option. Reported by Matt Edman;
33338 bugfix on 0.2.0.9-alpha.
33339 - Our new v2 hidden service descriptor format allows descriptors
33340 that have no introduction points. But Tor crashed when we tried
33341 to build a descriptor with no intro points (and it would have
33342 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33343 by Karsten Loesing.
33344 - Fix building with dmalloc 5.5.2 with glibc.
33345 - Reject uploaded descriptors and extrainfo documents if they're
33346 huge. Otherwise we'll cache them all over the network and it'll
33347 clog everything up. Reported by Aljosha Judmayer.
33348 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
33349 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
33350 - When the DANGEROUS_VERSION controller status event told us we're
33351 running an obsolete version, it used the string "OLD" to describe
33352 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
33353 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
33354 - If we can't expand our list of entry guards (e.g. because we're
33355 using bridges or we have StrictEntryNodes set), don't mark relays
33356 down when they fail a directory request. Otherwise we're too quick
33357 to mark all our entry points down. Bugfix on 0.1.2.x.
33358 - Fix handling of hex nicknames when answering controller requests for
33359 networkstatus by name, or when deciding whether to warn about unknown
33360 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
33361 - Fix a couple of hard-to-trigger autoconf problems that could result
33362 in really weird results on platforms whose sys/types.h files define
33363 nonstandard integer types. Bugfix on 0.1.2.x.
33364 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
33365 - Don't crash on name lookup when we have no current consensus. Fixes
33366 bug 538; bugfix on 0.2.0.x.
33367 - Only Tors that want to mirror the v2 directory info should
33368 create the "cached-status" directory in their datadir. (All Tors
33369 used to create it.) Bugfix on 0.2.0.9-alpha.
33370 - Directory authorities should only automatically download Extra Info
33371 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
33374 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
33375 consumers. (We already do this on HUP.)
33376 - Authorities and caches fetch the v2 networkstatus documents
33377 less often, now that v3 is encouraged.
33378 - Add a new config option BridgeRelay that specifies you want to
33379 be a bridge relay. Right now the only difference is that it makes
33380 you answer begin_dir requests, and it makes you cache dir info,
33381 even if your DirPort isn't on.
33382 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
33383 ask about source, timestamp of arrival, purpose, etc. We need
33384 something like this to help Vidalia not do GeoIP lookups on bridge
33386 - Allow multiple HashedControlPassword config lines, to support
33387 multiple controller passwords.
33388 - Authorities now decide whether they're authoritative for a given
33389 router based on the router's purpose.
33390 - New config options AuthDirBadDir and AuthDirListBadDirs for
33391 authorities to mark certain relays as "bad directories" in the
33392 networkstatus documents. Also supports the "!baddir" directive in
33393 the approved-routers file.
33396 Changes in version 0.2.0.12-alpha - 2007-11-16
33397 This twelfth development snapshot fixes some more build problems as
33398 well as a few minor bugs.
33401 - Make it build on OpenBSD again. Patch from tup.
33402 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
33403 package-building for Red Hat, OS X, etc.
33405 o Minor bugfixes (on 0.1.2.x):
33406 - Changing the ExitPolicyRejectPrivate setting should cause us to
33407 rebuild our server descriptor.
33409 o Minor bugfixes (on 0.2.0.x):
33410 - When we're lacking a consensus, don't try to perform rendezvous
33411 operations. Reported by Karsten Loesing.
33412 - Fix a small memory leak whenever we decide against using a
33413 newly picked entry guard. Reported by Mike Perry.
33414 - When authorities detected more than two relays running on the same
33415 IP address, they were clearing all the status flags but forgetting
33416 to clear the "hsdir" flag. So clients were being told that a
33417 given relay was the right choice for a v2 hsdir lookup, yet they
33418 never had its descriptor because it was marked as 'not running'
33420 - If we're trying to fetch a bridge descriptor and there's no way
33421 the bridge authority could help us (for example, we don't know
33422 a digest, or there is no bridge authority), don't be so eager to
33423 fall back to asking the bridge authority.
33424 - If we're using bridges or have strictentrynodes set, and our
33425 chosen exit is in the same family as all our bridges/entry guards,
33426 then be flexible about families.
33429 - When we negotiate a v2 link-layer connection (not yet implemented),
33430 accept RELAY_EARLY cells and turn them into RELAY cells if we've
33431 negotiated a v1 connection for their next step. Initial code for
33435 Changes in version 0.2.0.11-alpha - 2007-11-12
33436 This eleventh development snapshot fixes some build problems with
33437 the previous snapshot. It also includes a more secure-by-default exit
33438 policy for relays, fixes an enormous memory leak for exit relays, and
33439 fixes another bug where servers were falling out of the directory list.
33442 - Exit policies now reject connections that are addressed to a
33443 relay's public (external) IP address too, unless
33444 ExitPolicyRejectPrivate is turned off. We do this because too
33445 many relays are running nearby to services that trust them based
33446 on network address. Bugfix on 0.1.2.x.
33449 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33450 on every successful resolve. Reported by Mike Perry; bugfix
33452 - On authorities, never downgrade to old router descriptors simply
33453 because they're listed in the consensus. This created a catch-22
33454 where we wouldn't list a new descriptor because there was an
33455 old one in the consensus, and we couldn't get the new one in the
33456 consensus because we wouldn't list it. Possible fix for bug 548.
33457 Also, this might cause bug 543 to appear on authorities; if so,
33458 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
33460 o Packaging fixes on 0.2.0.10-alpha:
33461 - We were including instructions about what to do with the
33462 src/config/fallback-consensus file, but we weren't actually
33463 including it in the tarball. Disable all of that for now.
33466 - Allow people to say PreferTunnelledDirConns rather than
33467 PreferTunneledDirConns, for those alternate-spellers out there.
33470 - Don't reevaluate all the information from our consensus document
33471 just because we've downloaded a v2 networkstatus that we intend
33472 to cache. Fixes bug 545; bugfix on 0.2.0.x.
33475 Changes in version 0.2.0.10-alpha - 2007-11-10
33476 This tenth development snapshot adds a third v3 directory authority
33477 run by Mike Perry, adds most of Karsten Loesing's new hidden service
33478 descriptor format, fixes a bad crash bug and new bridge bugs introduced
33479 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
33480 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
33481 addresses many more minor issues.
33483 o New directory authorities:
33484 - Set up ides (run by Mike Perry) as the third v3 directory authority.
33487 - Allow tunnelled directory connections to ask for an encrypted
33488 "begin_dir" connection or an anonymized "uses a full Tor circuit"
33489 connection independently. Now we can make anonymized begin_dir
33490 connections for (e.g.) more secure hidden service posting and
33492 - More progress on proposal 114: code from Karsten Loesing to
33493 implement new hidden service descriptor format.
33494 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
33495 accommodate the growing number of servers that use the default
33496 and are reaching it.
33497 - Directory authorities use a new formula for selecting which nodes
33498 to advertise as Guards: they must be in the top 7/8 in terms of
33499 how long we have known about them, and above the median of those
33500 nodes in terms of weighted fractional uptime.
33501 - Make "not enough dir info yet" warnings describe *why* Tor feels
33502 it doesn't have enough directory info yet.
33505 - Stop servers from crashing if they set a Family option (or
33506 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
33508 - Make bridge users work again -- the move to v3 directories in
33509 0.2.0.9-alpha had introduced a number of bugs that made bridges
33510 no longer work for clients.
33511 - When the clock jumps forward a lot, do not allow the bandwidth
33512 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
33514 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
33515 - When the consensus lists a router descriptor that we previously were
33516 mirroring, but that we considered non-canonical, reload the
33517 descriptor as canonical. This fixes bug 543 where Tor servers
33518 would start complaining after a few days that they don't have
33519 enough directory information to build a circuit.
33520 - Consider replacing the current consensus when certificates arrive
33521 that make the pending consensus valid. Previously, we were only
33522 considering replacement when the new certs _didn't_ help.
33523 - Fix an assert error on startup if we didn't already have the
33524 consensus and certs cached in our datadirectory: we were caching
33525 the consensus in consensus_waiting_for_certs but then free'ing it
33527 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
33528 Request) if we need more v3 certs but we've already got pending
33529 requests for all of them.
33530 - Correctly back off from failing certificate downloads. Fixes
33532 - Authorities don't vote on the Running flag if they have been running
33533 for less than 30 minutes themselves. Fixes bug 547, where a newly
33534 started authority would vote that everyone was down.
33536 o New requirements:
33537 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
33538 it, it had no AES, and it hasn't seen any security patches since
33542 - Clients now hold circuitless TLS connections open for 1.5 times
33543 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
33544 rebuild a new circuit over them within that timeframe. Previously,
33545 they held them open only for KeepalivePeriod (5 minutes).
33546 - Use "If-Modified-Since" to avoid retrieving consensus
33547 networkstatuses that we already have.
33548 - When we have no consensus, check FallbackNetworkstatusFile (defaults
33549 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
33550 we start knowing some directory caches.
33551 - When we receive a consensus from the future, warn about skew.
33552 - Improve skew reporting: try to give the user a better log message
33553 about how skewed they are, and how much this matters.
33554 - When we have a certificate for an authority, believe that
33555 certificate's claims about the authority's IP address.
33556 - New --quiet command-line option to suppress the default console log.
33557 Good in combination with --hash-password.
33558 - Authorities send back an X-Descriptor-Not-New header in response to
33559 an accepted-but-discarded descriptor upload. Partially implements
33561 - Make the log message for "tls error. breaking." more useful.
33562 - Better log messages about certificate downloads, to attempt to
33563 track down the second incarnation of bug 546.
33565 o Minor features (bridges):
33566 - If bridge users set UpdateBridgesFromAuthority, but the digest
33567 they ask for is a 404 from the bridge authority, they now fall
33568 back to trying the bridge directly.
33569 - Bridges now use begin_dir to publish their server descriptor to
33570 the bridge authority, even when they haven't set TunnelDirConns.
33572 o Minor features (controller):
33573 - When reporting clock skew, and we know that the clock is _at least
33574 as skewed_ as some value, but we don't know the actual value,
33575 report the value as a "minimum skew."
33578 - Update linux-tor-prio.sh script to allow QoS based on the uid of
33579 the Tor process. Patch from Marco Bonetti with tweaks from Mike
33583 - Refuse to start if both ORPort and UseBridges are set. Bugfix
33584 on 0.2.0.x, suggested by Matt Edman.
33585 - Don't stop fetching descriptors when FetchUselessDescriptors is
33586 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
33587 reported by tup and ioerror.
33588 - Better log message on vote from unknown authority.
33589 - Don't log "Launching 0 request for 0 router" message.
33591 o Minor bugfixes (memory leaks):
33592 - Stop leaking memory every time we parse a v3 certificate. Bugfix
33594 - Stop leaking memory every time we load a v3 certificate. Bugfix
33595 on 0.2.0.1-alpha. Fixes bug 536.
33596 - Stop leaking a cached networkstatus on exit. Bugfix on
33598 - Stop leaking voter information every time we free a consensus.
33599 Bugfix on 0.2.0.3-alpha.
33600 - Stop leaking signed data every time we check a voter signature.
33601 Bugfix on 0.2.0.3-alpha.
33602 - Stop leaking a signature every time we fail to parse a consensus or
33603 a vote. Bugfix on 0.2.0.3-alpha.
33604 - Stop leaking v2_download_status_map on shutdown. Bugfix on
33606 - Stop leaking conn->nickname every time we make a connection to a
33607 Tor relay without knowing its expected identity digest (e.g. when
33608 using bridges). Bugfix on 0.2.0.3-alpha.
33610 - Minor bugfixes (portability):
33611 - Run correctly on platforms where rlim_t is larger than unsigned
33612 long, and/or where the real limit for number of open files is
33613 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
33614 particular, these may be needed for OS X 10.5.
33617 Changes in version 0.1.2.18 - 2007-10-28
33618 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
33619 hidden service introduction that were causing huge delays, and a big
33620 bug that was causing some servers to disappear from the network status
33621 lists for a few hours each day.
33623 o Major bugfixes (crashes):
33624 - If a connection is shut down abruptly because of something that
33625 happened inside connection_flushed_some(), do not call
33626 connection_finished_flushing(). Should fix bug 451:
33627 "connection_stop_writing: Assertion conn->write_event failed"
33628 Bugfix on 0.1.2.7-alpha.
33629 - Fix possible segfaults in functions called from
33630 rend_process_relay_cell().
33632 o Major bugfixes (hidden services):
33633 - Hidden services were choosing introduction points uniquely by
33634 hexdigest, but when constructing the hidden service descriptor
33635 they merely wrote the (potentially ambiguous) nickname.
33636 - Clients now use the v2 intro format for hidden service
33637 connections: they specify their chosen rendezvous point by identity
33638 digest rather than by (potentially ambiguous) nickname. These
33639 changes could speed up hidden service connections dramatically.
33641 o Major bugfixes (other):
33642 - Stop publishing a new server descriptor just because we get a
33643 HUP signal. This led (in a roundabout way) to some servers getting
33644 dropped from the networkstatus lists for a few hours each day.
33645 - When looking for a circuit to cannibalize, consider family as well
33646 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33647 circuit cannibalization).
33648 - When a router wasn't listed in a new networkstatus, we were leaving
33649 the flags for that router alone -- meaning it remained Named,
33650 Running, etc -- even though absence from the networkstatus means
33651 that it shouldn't be considered to exist at all anymore. Now we
33652 clear all the flags for routers that fall out of the networkstatus
33653 consensus. Fixes bug 529.
33656 - Don't try to access (or alter) the state file when running
33657 --list-fingerprint or --verify-config or --hash-password. Resolves
33659 - When generating information telling us how to extend to a given
33660 router, do not try to include the nickname if it is
33661 absent. Resolves bug 467.
33662 - Fix a user-triggerable segfault in expand_filename(). (There isn't
33663 a way to trigger this remotely.)
33664 - When sending a status event to the controller telling it that an
33665 OR address is reachable, set the port correctly. (Previously we
33666 were reporting the dir port.)
33667 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33668 command. Bugfix on 0.1.2.17.
33669 - When loading bandwidth history, do not believe any information in
33670 the future. Fixes bug 434.
33671 - When loading entry guard information, do not believe any information
33673 - When we have our clock set far in the future and generate an
33674 onion key, then re-set our clock to be correct, we should not stop
33675 the onion key from getting rotated.
33676 - On some platforms, accept() can return a broken address. Detect
33677 this more quietly, and deal accordingly. Fixes bug 483.
33678 - It's not actually an error to find a non-pending entry in the DNS
33679 cache when canceling a pending resolve. Don't log unless stuff
33680 is fishy. Resolves bug 463.
33681 - Don't reset trusted dir server list when we set a configuration
33682 option. Patch from Robert Hogan.
33683 - Don't try to create the datadir when running --verify-config or
33684 --hash-password. Resolves bug 540.
33687 Changes in version 0.2.0.9-alpha - 2007-10-24
33688 This ninth development snapshot switches clients to the new v3 directory
33689 system; allows servers to be listed in the network status even when they
33690 have the same nickname as a registered server; and fixes many other
33691 bugs including a big one that was causing some servers to disappear
33692 from the network status lists for a few hours each day.
33694 o Major features (directory system):
33695 - Clients now download v3 consensus networkstatus documents instead
33696 of v2 networkstatus documents. Clients and caches now base their
33697 opinions about routers on these consensus documents. Clients only
33698 download router descriptors listed in the consensus.
33699 - Authorities now list servers who have the same nickname as
33700 a different named server, but list them with a new flag,
33701 "Unnamed". Now we can list servers that happen to pick the same
33702 nickname as a server that registered two years ago and then
33703 disappeared. Partially implements proposal 122.
33704 - If the consensus lists a router as "Unnamed", the name is assigned
33705 to a different router: do not identify the router by that name.
33706 Partially implements proposal 122.
33707 - Authorities can now come to a consensus on which method to use to
33708 compute the consensus. This gives us forward compatibility.
33711 - Stop publishing a new server descriptor just because we HUP or
33712 when we find our DirPort to be reachable but won't actually publish
33713 it. New descriptors without any real changes are dropped by the
33714 authorities, and can screw up our "publish every 18 hours" schedule.
33716 - When a router wasn't listed in a new networkstatus, we were leaving
33717 the flags for that router alone -- meaning it remained Named,
33718 Running, etc -- even though absence from the networkstatus means
33719 that it shouldn't be considered to exist at all anymore. Now we
33720 clear all the flags for routers that fall out of the networkstatus
33721 consensus. Fixes bug 529; bugfix on 0.1.2.x.
33722 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
33723 extrainfo documents and then discard them immediately for not
33724 matching the latest router. Bugfix on 0.2.0.1-alpha.
33726 o Minor features (v3 directory protocol):
33727 - Allow tor-gencert to generate a new certificate without replacing
33729 - Allow certificates to include an address.
33730 - When we change our directory-cache settings, reschedule all voting
33731 and download operations.
33732 - Reattempt certificate downloads immediately on failure, as long as
33733 we haven't failed a threshold number of times yet.
33734 - Delay retrying consensus downloads while we're downloading
33735 certificates to verify the one we just got. Also, count getting a
33736 consensus that we already have (or one that isn't valid) as a failure,
33737 and count failing to get the certificates after 20 minutes as a
33739 - Build circuits and download descriptors even if our consensus is a
33740 little expired. (This feature will go away once authorities are
33743 o Minor features (router descriptor cache):
33744 - If we find a cached-routers file that's been sitting around for more
33745 than 28 days unmodified, then most likely it's a leftover from
33746 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
33748 - When we (as a cache) download a descriptor because it was listed
33749 in a consensus, remember when the consensus was supposed to expire,
33750 and don't expire the descriptor until then.
33752 o Minor features (performance):
33753 - Call routerlist_remove_old_routers() much less often. This should
33754 speed startup, especially on directory caches.
33755 - Don't try to launch new descriptor downloads quite so often when we
33756 already have enough directory information to build circuits.
33757 - Base64 decoding was actually showing up on our profile when parsing
33758 the initial descriptor file; switch to an in-process all-at-once
33759 implementation that's about 3.5x times faster than calling out to
33762 o Minor features (compilation):
33763 - Detect non-ASCII platforms (if any still exist) and refuse to
33764 build there: some of our code assumes that 'A' is 65 and so on.
33766 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
33767 - Make the "next period" votes into "current period" votes immediately
33768 after publishing the consensus; avoid a heisenbug that made them
33769 stick around indefinitely.
33770 - When we discard a vote as a duplicate, do not report this as
33772 - Treat missing v3 keys or certificates as an error when running as a
33773 v3 directory authority.
33774 - When we're configured to be a v3 authority, but we're only listed
33775 as a non-v3 authority in our DirServer line for ourself, correct
33777 - If an authority doesn't have a qualified hostname, just put
33778 its address in the vote. This fixes the problem where we referred to
33779 "moria on moria:9031."
33780 - Distinguish between detached signatures for the wrong period, and
33781 detached signatures for a divergent vote.
33782 - Fix a small memory leak when computing a consensus.
33783 - When there's no consensus, we were forming a vote every 30
33784 minutes, but writing the "valid-after" line in our vote based
33785 on our configured V3AuthVotingInterval: so unless the intervals
33786 matched up, we immediately rejected our own vote because it didn't
33787 start at the voting interval that caused us to construct a vote.
33789 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
33790 - Delete unverified-consensus when the real consensus is set.
33791 - Consider retrying a consensus networkstatus fetch immediately
33792 after one fails: don't wait 60 seconds to notice.
33793 - When fetching a consensus as a cache, wait until a newer consensus
33794 should exist before trying to replace the current one.
33795 - Use a more forgiving schedule for retrying failed consensus
33796 downloads than for other types.
33798 o Minor bugfixes (other directory issues):
33799 - Correct the implementation of "download votes by digest." Bugfix on
33801 - Authorities no longer send back "400 you're unreachable please fix
33802 it" errors to Tor servers that aren't online all the time. We're
33803 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
33805 o Minor bugfixes (controller):
33806 - Don't reset trusted dir server list when we set a configuration
33807 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
33808 - Respond to INT and TERM SIGNAL commands before we execute the
33809 signal, in case the signal shuts us down. We had a patch in
33810 0.1.2.1-alpha that tried to do this by queueing the response on
33811 the connection's buffer before shutting down, but that really
33812 isn't the same thing at all. Bug located by Matt Edman.
33814 o Minor bugfixes (misc):
33815 - Correctly check for bad options to the "PublishServerDescriptor"
33816 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
33817 - Stop leaking memory on failing case of base32_decode, and make
33818 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
33819 - Don't try to download extrainfo documents when we're trying to
33820 fetch enough directory info to build a circuit: having enough
33821 info should get priority. Bugfix on 0.2.0.x.
33822 - Don't complain that "your server has not managed to confirm that its
33823 ports are reachable" if we haven't been able to build any circuits
33824 yet. Bug found by spending four hours without a v3 consensus. Bugfix
33826 - Detect the reason for failing to mmap a descriptor file we just
33827 wrote, and give a more useful log message. Fixes bug 533. Bugfix
33830 o Code simplifications and refactoring:
33831 - Remove support for the old bw_accounting file: we've been storing
33832 bandwidth accounting information in the state file since
33833 0.1.2.5-alpha. This may result in bandwidth accounting errors
33834 if you try to upgrade from 0.1.1.x or earlier, or if you try to
33835 downgrade to 0.1.1.x or earlier.
33836 - New convenience code to locate a file within the DataDirectory.
33837 - Move non-authority functionality out of dirvote.c.
33838 - Refactor the arguments for router_pick_{directory_|trusteddir}server
33839 so that they all take the same named flags.
33842 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
33843 Unix users an easy way to script their Tor process (e.g. by
33844 adjusting bandwidth based on the time of the day).
33847 Changes in version 0.2.0.8-alpha - 2007-10-12
33848 This eighth development snapshot fixes a crash bug that's been bothering
33849 us since February 2007, lets bridge authorities store a list of bridge
33850 descriptors they've seen, gets v3 directory voting closer to working,
33851 starts caching v3 directory consensus documents on directory mirrors,
33852 and fixes a variety of smaller issues including some minor memory leaks.
33854 o Major features (router descriptor cache):
33855 - Store routers in a file called cached-descriptors instead of in
33856 cached-routers. Initialize cached-descriptors from cached-routers
33857 if the old format is around. The new format allows us to store
33858 annotations along with descriptors.
33859 - Use annotations to record the time we received each descriptor, its
33860 source, and its purpose.
33861 - Disable the SETROUTERPURPOSE controller command: it is now
33863 - Controllers should now specify cache=no or cache=yes when using
33864 the +POSTDESCRIPTOR command.
33865 - Bridge authorities now write bridge descriptors to disk, meaning
33866 we can export them to other programs and begin distributing them
33869 o Major features (directory authorities):
33870 - When a v3 authority is missing votes or signatures, it now tries
33872 - Directory authorities track weighted fractional uptime as well as
33873 weighted mean-time-between failures. WFU is suitable for deciding
33874 whether a node is "usually up", while MTBF is suitable for deciding
33875 whether a node is "likely to stay up." We need both, because
33876 "usually up" is a good requirement for guards, while "likely to
33877 stay up" is a good requirement for long-lived connections.
33879 o Major features (v3 directory system):
33880 - Caches now download v3 network status documents as needed,
33881 and download the descriptors listed in them.
33882 - All hosts now attempt to download and keep fresh v3 authority
33883 certificates, and re-attempt after failures.
33884 - More internal-consistency checks for vote parsing.
33886 o Major bugfixes (crashes):
33887 - If a connection is shut down abruptly because of something that
33888 happened inside connection_flushed_some(), do not call
33889 connection_finished_flushing(). Should fix bug 451. Bugfix on
33892 o Major bugfixes (performance):
33893 - Fix really bad O(n^2) performance when parsing a long list of
33894 routers: Instead of searching the entire list for an "extra-info "
33895 string which usually wasn't there, once for every routerinfo
33896 we read, just scan lines forward until we find one we like.
33898 - When we add data to a write buffer in response to the data on that
33899 write buffer getting low because of a flush, do not consider the
33900 newly added data as a candidate for immediate flushing, but rather
33901 make it wait until the next round of writing. Otherwise, we flush
33902 and refill recursively, and a single greedy TLS connection can
33903 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
33905 o Minor features (v3 authority system):
33906 - Add more ways for tools to download the votes that lead to the
33908 - Send a 503 when low on bandwidth and a vote, consensus, or
33909 certificate is requested.
33910 - If-modified-since is now implemented properly for all kinds of
33911 certificate requests.
33913 o Minor bugfixes (network statuses):
33914 - Tweak the implementation of proposal 109 slightly: allow at most
33915 two Tor servers on the same IP address, except if it's the location
33916 of a directory authority, in which case allow five. Bugfix on
33919 o Minor bugfixes (controller):
33920 - When sending a status event to the controller telling it that an
33921 OR address is reachable, set the port correctly. (Previously we
33922 were reporting the dir port.) Bugfix on 0.1.2.x.
33924 o Minor bugfixes (v3 directory system):
33925 - Fix logic to look up a cert by its signing key digest. Bugfix on
33927 - Only change the reply to a vote to "OK" if it's not already
33928 set. This gets rid of annoying "400 OK" log messages, which may
33929 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
33930 - When we get a valid consensus, recompute the voting schedule.
33931 - Base the valid-after time of a vote on the consensus voting
33932 schedule, not on our preferred schedule.
33933 - Make the return values and messages from signature uploads and
33934 downloads more sensible.
33935 - Fix a memory leak when serving votes and consensus documents, and
33936 another when serving certificates.
33938 o Minor bugfixes (performance):
33939 - Use a slightly simpler string hashing algorithm (copying Python's
33940 instead of Java's) and optimize our digest hashing algorithm to take
33941 advantage of 64-bit platforms and to remove some possibly-costly
33943 - Fix a minor memory leak whenever we parse guards from our state
33944 file. Bugfix on 0.2.0.7-alpha.
33945 - Fix a minor memory leak whenever we write out a file. Bugfix on
33947 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33948 command. Bugfix on 0.2.0.5-alpha.
33950 o Minor bugfixes (portability):
33951 - On some platforms, accept() can return a broken address. Detect
33952 this more quietly, and deal accordingly. Fixes bug 483.
33953 - Stop calling tor_strlower() on uninitialized memory in some cases.
33954 Bugfix in 0.2.0.7-alpha.
33956 o Minor bugfixes (usability):
33957 - Treat some 403 responses from directory servers as INFO rather than
33958 WARN-severity events.
33959 - It's not actually an error to find a non-pending entry in the DNS
33960 cache when canceling a pending resolve. Don't log unless stuff is
33961 fishy. Resolves bug 463.
33963 o Minor bugfixes (anonymity):
33964 - Never report that we've used more bandwidth than we're willing to
33965 relay: it leaks how much non-relay traffic we're using. Resolves
33967 - When looking for a circuit to cannibalize, consider family as well
33968 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33969 circuit cannibalization).
33971 o Code simplifications and refactoring:
33972 - Make a bunch of functions static. Remove some dead code.
33973 - Pull out about a third of the really big routerlist.c; put it in a
33974 new module, networkstatus.c.
33975 - Merge the extra fields in local_routerstatus_t back into
33976 routerstatus_t: we used to need one routerstatus_t for each
33977 authority's opinion, plus a local_routerstatus_t for the locally
33978 computed consensus opinion. To save space, we put the locally
33979 modified fields into local_routerstatus_t, and only the common
33980 stuff into routerstatus_t. But once v3 directories are in use,
33981 clients and caches will no longer need to hold authority opinions;
33982 thus, the rationale for keeping the types separate is now gone.
33983 - Make the code used to reschedule and reattempt downloads more
33985 - Turn all 'Are we a directory server/mirror?' logic into a call to
33987 - Remove the code to generate the oldest (v1) directory format.
33988 The code has been disabled since 0.2.0.5-alpha.
33991 Changes in version 0.2.0.7-alpha - 2007-09-21
33992 This seventh development snapshot makes bridges work again, makes bridge
33993 authorities work for the first time, fixes two huge performance flaws
33994 in hidden services, and fixes a variety of minor issues.
33996 o New directory authorities:
33997 - Set up moria1 and tor26 as the first v3 directory authorities. See
33998 doc/spec/dir-spec.txt for details on the new directory design.
34000 o Major bugfixes (crashes):
34001 - Fix possible segfaults in functions called from
34002 rend_process_relay_cell(). Bugfix on 0.1.2.x.
34004 o Major bugfixes (bridges):
34005 - Fix a bug that made servers send a "404 Not found" in response to
34006 attempts to fetch their server descriptor. This caused Tor servers
34007 to take many minutes to establish reachability for their DirPort,
34008 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
34009 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
34010 users configure that and specify a bridge with an identity
34011 fingerprint, now they will lookup the bridge descriptor at the
34012 default bridge authority via a one-hop tunnel, but once circuits
34013 are established they will switch to a three-hop tunnel for later
34014 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
34016 o Major bugfixes (hidden services):
34017 - Hidden services were choosing introduction points uniquely by
34018 hexdigest, but when constructing the hidden service descriptor
34019 they merely wrote the (potentially ambiguous) nickname.
34020 - Clients now use the v2 intro format for hidden service
34021 connections: they specify their chosen rendezvous point by identity
34022 digest rather than by (potentially ambiguous) nickname. Both
34023 are bugfixes on 0.1.2.x, and they could speed up hidden service
34024 connections dramatically. Thanks to Karsten Loesing.
34026 o Minor features (security):
34027 - As a client, do not believe any server that tells us that an
34028 address maps to an internal address space.
34029 - Make it possible to enable HashedControlPassword and
34030 CookieAuthentication at the same time.
34032 o Minor features (guard nodes):
34033 - Tag every guard node in our state file with the version that
34034 we believe added it, or with our own version if we add it. This way,
34035 if a user temporarily runs an old version of Tor and then switches
34036 back to a new one, she doesn't automatically lose her guards.
34038 o Minor features (speed):
34039 - When implementing AES counter mode, update only the portions of the
34040 counter buffer that need to change, and don't keep separate
34041 network-order and host-order counters when they are the same (i.e.,
34042 on big-endian hosts.)
34044 o Minor features (controller):
34045 - Accept LF instead of CRLF on controller, since some software has a
34046 hard time generating real Internet newlines.
34047 - Add GETINFO values for the server status events
34048 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
34051 o Removed features:
34052 - Routers no longer include bandwidth-history lines in their
34053 descriptors; this information is already available in extra-info
34054 documents, and including it in router descriptors took up 60%
34055 (!) of compressed router descriptor downloads. Completes
34056 implementation of proposal 104.
34057 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
34058 and TorControl.py, as they use the old v0 controller protocol,
34059 and are obsoleted by TorFlow anyway.
34060 - Drop support for v1 rendezvous descriptors, since we never used
34061 them anyway, and the code has probably rotted by now. Based on
34062 patch from Karsten Loesing.
34063 - On OSX, stop warning the user that kqueue support in libevent is
34064 "experimental", since it seems to have worked fine for ages.
34067 - When generating information telling us how to extend to a given
34068 router, do not try to include the nickname if it is absent. Fixes
34069 bug 467. Bugfix on 0.2.0.3-alpha.
34070 - Fix a user-triggerable (but not remotely-triggerable) segfault
34071 in expand_filename(). Bugfix on 0.1.2.x.
34072 - Fix a memory leak when freeing incomplete requests from DNSPort.
34073 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
34074 - Don't try to access (or alter) the state file when running
34075 --list-fingerprint or --verify-config or --hash-password. (Resolves
34076 bug 499.) Bugfix on 0.1.2.x.
34077 - Servers used to decline to publish their DirPort if their
34078 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
34079 were below a threshold. Now they only look at BandwidthRate and
34080 RelayBandwidthRate. Bugfix on 0.1.2.x.
34081 - Remove an optimization in the AES counter-mode code that assumed
34082 that the counter never exceeded 2^68. When the counter can be set
34083 arbitrarily as an IV (as it is by Karsten's new hidden services
34084 code), this assumption no longer holds. Bugfix on 0.1.2.x.
34085 - Resume listing "AUTHORITY" flag for authorities in network status.
34086 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
34088 o Code simplifications and refactoring:
34089 - Revamp file-writing logic so we don't need to have the entire
34090 contents of a file in memory at once before we write to disk. Tor,
34092 - Turn "descriptor store" into a full-fledged type.
34093 - Move all NT services code into a separate source file.
34094 - Unify all code that computes medians, percentile elements, etc.
34095 - Get rid of a needless malloc when parsing address policies.
34098 Changes in version 0.1.2.17 - 2007-08-30
34099 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
34100 X bundles. Vidalia 0.0.14 makes authentication required for the
34101 ControlPort in the default configuration, which addresses important
34102 security risks. Everybody who uses Vidalia (or another controller)
34105 In addition, this Tor update fixes major load balancing problems with
34106 path selection, which should speed things up a lot once many people
34109 o Major bugfixes (security):
34110 - We removed support for the old (v0) control protocol. It has been
34111 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
34112 become more of a headache than it's worth.
34114 o Major bugfixes (load balancing):
34115 - When choosing nodes for non-guard positions, weight guards
34116 proportionally less, since they already have enough load. Patch
34118 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34119 will allow fast Tor servers to get more attention.
34120 - When we're upgrading from an old Tor version, forget our current
34121 guards and pick new ones according to the new weightings. These
34122 three load balancing patches could raise effective network capacity
34123 by a factor of four. Thanks to Mike Perry for measurements.
34125 o Major bugfixes (stream expiration):
34126 - Expire not-yet-successful application streams in all cases if
34127 they've been around longer than SocksTimeout. Right now there are
34128 some cases where the stream will live forever, demanding a new
34129 circuit every 15 seconds. Fixes bug 454; reported by lodger.
34131 o Minor features (controller):
34132 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34133 is valid before any authentication has been received. It tells
34134 a controller what kind of authentication is expected, and what
34135 protocol is spoken. Implements proposal 119.
34137 o Minor bugfixes (performance):
34138 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
34139 greatly speeding up loading cached-routers from disk on startup.
34140 - Disable sentinel-based debugging for buffer code: we squashed all
34141 the bugs that this was supposed to detect a long time ago, and now
34142 its only effect is to change our buffer sizes from nice powers of
34143 two (which platform mallocs tend to like) to values slightly over
34144 powers of two (which make some platform mallocs sad).
34146 o Minor bugfixes (misc):
34147 - If exit bandwidth ever exceeds one third of total bandwidth, then
34148 use the correct formula to weight exit nodes when choosing paths.
34149 Based on patch from Mike Perry.
34150 - Choose perfectly fairly among routers when choosing by bandwidth and
34151 weighting by fraction of bandwidth provided by exits. Previously, we
34152 would choose with only approximate fairness, and correct ourselves
34153 if we ran off the end of the list.
34154 - If we require CookieAuthentication but we fail to write the
34155 cookie file, we would warn but not exit, and end up in a state
34156 where no controller could authenticate. Now we exit.
34157 - If we require CookieAuthentication, stop generating a new cookie
34158 every time we change any piece of our config.
34159 - Refuse to start with certain directory authority keys, and
34160 encourage people using them to stop.
34161 - Terminate multi-line control events properly. Original patch
34163 - Fix a minor memory leak when we fail to find enough suitable
34164 servers to choose a circuit.
34165 - Stop leaking part of the descriptor when we run into a particularly
34166 unparseable piece of it.
34169 Changes in version 0.2.0.6-alpha - 2007-08-26
34170 This sixth development snapshot features a new Vidalia version in the
34171 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
34172 the ControlPort in the default configuration, which addresses important
34175 In addition, this snapshot fixes major load balancing problems
34176 with path selection, which should speed things up a lot once many
34177 people have upgraded. The directory authorities also use a new
34178 mean-time-between-failure approach to tracking which servers are stable,
34179 rather than just looking at the most recent uptime.
34181 o New directory authorities:
34182 - Set up Tonga as the default bridge directory authority.
34185 - Directory authorities now track servers by weighted
34186 mean-times-between-failures. When we have 4 or more days of data,
34187 use measured MTBF rather than declared uptime to decide whether
34188 to call a router Stable. Implements proposal 108.
34190 o Major bugfixes (load balancing):
34191 - When choosing nodes for non-guard positions, weight guards
34192 proportionally less, since they already have enough load. Patch
34194 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
34195 will allow fast Tor servers to get more attention.
34196 - When we're upgrading from an old Tor version, forget our current
34197 guards and pick new ones according to the new weightings. These
34198 three load balancing patches could raise effective network capacity
34199 by a factor of four. Thanks to Mike Perry for measurements.
34201 o Major bugfixes (descriptor parsing):
34202 - Handle unexpected whitespace better in malformed descriptors. Bug
34203 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
34206 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
34207 GETINFO for Torstat to use until it can switch to using extrainfos.
34208 - Optionally (if built with -DEXPORTMALLINFO) export the output
34209 of mallinfo via http, as tor/mallinfo.txt. Only accessible
34213 - Do not intermix bridge routers with controller-added
34214 routers. (Bugfix on 0.2.0.x)
34215 - Do not fail with an assert when accept() returns an unexpected
34216 address family. Addresses but does not wholly fix bug 483. (Bugfix
34218 - Let directory authorities startup even when they can't generate
34219 a descriptor immediately, e.g. because they don't know their
34221 - Stop putting the authentication cookie in a file called "0"
34222 in your working directory if you don't specify anything for the
34223 new CookieAuthFile option. Reported by Matt Edman.
34224 - Make it possible to read the PROTOCOLINFO response in a way that
34225 conforms to our control-spec. Reported by Matt Edman.
34226 - Fix a minor memory leak when we fail to find enough suitable
34227 servers to choose a circuit. Bugfix on 0.1.2.x.
34228 - Stop leaking part of the descriptor when we run into a particularly
34229 unparseable piece of it. Bugfix on 0.1.2.x.
34230 - Unmap the extrainfo cache file on exit.
34233 Changes in version 0.2.0.5-alpha - 2007-08-19
34234 This fifth development snapshot fixes compilation on Windows again;
34235 fixes an obnoxious client-side bug that slowed things down and put
34236 extra load on the network; gets us closer to using the v3 directory
34237 voting scheme; makes it easier for Tor controllers to use cookie-based
34238 authentication; and fixes a variety of other bugs.
34240 o Removed features:
34241 - Version 1 directories are no longer generated in full. Instead,
34242 authorities generate and serve "stub" v1 directories that list
34243 no servers. This will stop Tor versions 0.1.0.x and earlier from
34244 working, but (for security reasons) nobody should be running those
34247 o Major bugfixes (compilation, 0.2.0.x):
34248 - Try to fix Win32 compilation again: improve checking for IPv6 types.
34249 - Try to fix MSVC compilation: build correctly on platforms that do
34250 not define s6_addr16 or s6_addr32.
34251 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
34254 o Major bugfixes (stream expiration):
34255 - Expire not-yet-successful application streams in all cases if
34256 they've been around longer than SocksTimeout. Right now there are
34257 some cases where the stream will live forever, demanding a new
34258 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
34259 reported by lodger.
34261 o Minor features (directory servers):
34262 - When somebody requests a list of statuses or servers, and we have
34263 none of those, return a 404 rather than an empty 200.
34265 o Minor features (directory voting):
34266 - Store v3 consensus status consensuses on disk, and reload them
34269 o Minor features (security):
34270 - Warn about unsafe ControlPort configurations.
34271 - Refuse to start with certain directory authority keys, and
34272 encourage people using them to stop.
34274 o Minor features (controller):
34275 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
34276 is valid before any authentication has been received. It tells
34277 a controller what kind of authentication is expected, and what
34278 protocol is spoken. Implements proposal 119.
34279 - New config option CookieAuthFile to choose a new location for the
34280 cookie authentication file, and config option
34281 CookieAuthFileGroupReadable to make it group-readable.
34283 o Minor features (unit testing):
34284 - Add command-line arguments to unit-test executable so that we can
34285 invoke any chosen test from the command line rather than having
34286 to run the whole test suite at once; and so that we can turn on
34287 logging for the unit tests.
34289 o Minor bugfixes (on 0.1.2.x):
34290 - If we require CookieAuthentication but we fail to write the
34291 cookie file, we would warn but not exit, and end up in a state
34292 where no controller could authenticate. Now we exit.
34293 - If we require CookieAuthentication, stop generating a new cookie
34294 every time we change any piece of our config.
34295 - When loading bandwidth history, do not believe any information in
34296 the future. Fixes bug 434.
34297 - When loading entry guard information, do not believe any information
34299 - When we have our clock set far in the future and generate an
34300 onion key, then re-set our clock to be correct, we should not stop
34301 the onion key from getting rotated.
34302 - Clean up torrc sample config file.
34303 - Do not automatically run configure from autogen.sh. This
34304 non-standard behavior tended to annoy people who have built other
34307 o Minor bugfixes (on 0.2.0.x):
34308 - Fix a bug with AutomapHostsOnResolve that would always cause
34309 the second request to fail. Bug reported by Kate. Bugfix on
34311 - Fix a bug in ADDRMAP controller replies that would sometimes
34312 try to print a NULL. Patch from tup.
34313 - Read v3 directory authority keys from the right location.
34314 - Numerous bugfixes to directory voting code.
34317 Changes in version 0.1.2.16 - 2007-08-01
34318 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
34319 remote attacker in certain situations to rewrite the user's torrc
34320 configuration file. This can completely compromise anonymity of users
34321 in most configurations, including those running the Vidalia bundles,
34322 TorK, etc. Or worse.
34324 o Major security fixes:
34325 - Close immediately after missing authentication on control port;
34326 do not allow multiple authentication attempts.
34329 Changes in version 0.2.0.4-alpha - 2007-08-01
34330 This fourth development snapshot fixes a critical security vulnerability
34331 for most users, specifically those running Vidalia, TorK, etc. Everybody
34332 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34334 o Major security fixes:
34335 - Close immediately after missing authentication on control port;
34336 do not allow multiple authentication attempts.
34338 o Major bugfixes (compilation):
34339 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34342 o Minor features (performance):
34343 - Be even more aggressive about releasing RAM from small
34344 empty buffers. Thanks to our free-list code, this shouldn't be too
34345 performance-intensive.
34346 - Disable sentinel-based debugging for buffer code: we squashed all
34347 the bugs that this was supposed to detect a long time ago, and
34348 now its only effect is to change our buffer sizes from nice
34349 powers of two (which platform mallocs tend to like) to values
34350 slightly over powers of two (which make some platform mallocs sad).
34351 - Log malloc statistics from mallinfo() on platforms where it
34355 Changes in version 0.2.0.3-alpha - 2007-07-29
34356 This third development snapshot introduces new experimental
34357 blocking-resistance features and a preliminary version of the v3
34358 directory voting design, and includes many other smaller features
34362 - The first pieces of our "bridge" design for blocking-resistance
34363 are implemented. People can run bridge directory authorities;
34364 people can run bridges; and people can configure their Tor clients
34365 with a set of bridges to use as the first hop into the Tor network.
34366 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
34368 - Create listener connections before we setuid to the configured
34369 User and Group. Now non-Windows users can choose port values
34370 under 1024, start Tor as root, and have Tor bind those ports
34371 before it changes to another UID. (Windows users could already
34373 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
34374 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
34375 on "vserver" accounts. (Patch from coderman.)
34376 - Be even more aggressive about separating local traffic from relayed
34377 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
34379 o Major features (experimental):
34380 - First cut of code for "v3 dir voting": directory authorities will
34381 vote on a common network status document rather than each publishing
34382 their own opinion. This code needs more testing and more corner-case
34383 handling before it's ready for use.
34386 - Directory authorities now call routers Fast if their bandwidth is
34387 at least 100KB/s, and consider their bandwidth adequate to be a
34388 Guard if it is at least 250KB/s, no matter the medians. This fix
34389 complements proposal 107. [Bugfix on 0.1.2.x]
34390 - Directory authorities now never mark more than 3 servers per IP as
34391 Valid and Running. (Implements proposal 109, by Kevin Bauer and
34393 - Minor change to organizationName and commonName generation
34394 procedures in TLS certificates during Tor handshakes, to invalidate
34395 some earlier censorware approaches. This is not a long-term
34396 solution, but applying it will give us a bit of time to look into
34397 the epidemiology of countermeasures as they spread.
34399 o Major bugfixes (directory):
34400 - Rewrite directory tokenization code to never run off the end of
34401 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
34403 o Minor features (controller):
34404 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
34405 match requests to applications. (Patch from Robert Hogan.)
34406 - Report address and port correctly on connections to DNSPort. (Patch
34407 from Robert Hogan.)
34408 - Add a RESOLVE command to launch hostname lookups. (Original patch
34409 from Robert Hogan.)
34410 - Add GETINFO status/enough-dir-info to let controllers tell whether
34411 Tor has downloaded sufficient directory information. (Patch
34413 - You can now use the ControlSocket option to tell Tor to listen for
34414 controller connections on Unix domain sockets on systems that
34415 support them. (Patch from Peter Palfrader.)
34416 - STREAM NEW events are generated for DNSPort requests and for
34417 tunneled directory connections. (Patch from Robert Hogan.)
34418 - New "GETINFO address-mappings/*" command to get address mappings
34419 with expiry information. "addr-mappings/*" is now deprecated.
34422 o Minor features (misc):
34423 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
34425 - The tor-gencert tool for v3 directory authorities now creates all
34426 files as readable to the file creator only, and write-protects
34427 the authority identity key.
34428 - When dumping memory usage, list bytes used in buffer memory
34430 - When running with dmalloc, dump more stats on hup and on exit.
34431 - Directory authorities now fail quickly and (relatively) harmlessly
34432 if they generate a network status document that is somehow
34435 o Traffic load balancing improvements:
34436 - If exit bandwidth ever exceeds one third of total bandwidth, then
34437 use the correct formula to weight exit nodes when choosing paths.
34438 (Based on patch from Mike Perry.)
34439 - Choose perfectly fairly among routers when choosing by bandwidth and
34440 weighting by fraction of bandwidth provided by exits. Previously, we
34441 would choose with only approximate fairness, and correct ourselves
34442 if we ran off the end of the list. [Bugfix on 0.1.2.x]
34444 o Performance improvements:
34445 - Be more aggressive with freeing buffer RAM or putting it on the
34447 - Use Critical Sections rather than Mutexes for synchronizing threads
34448 on win32; Mutexes are heavier-weight, and designed for synchronizing
34451 o Deprecated and removed features:
34452 - RedirectExits is now deprecated.
34453 - Stop allowing address masks that do not correspond to bit prefixes.
34454 We have warned about these for a really long time; now it's time
34455 to reject them. (Patch from croup.)
34457 o Minor bugfixes (directory):
34458 - Fix another crash bug related to extra-info caching. (Bug found by
34459 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
34460 - Directories no longer return a "304 not modified" when they don't
34461 have the networkstatus the client asked for. Also fix a memory
34462 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
34463 - We had accidentally labelled 0.1.2.x directory servers as not
34464 suitable for begin_dir requests, and had labelled no directory
34465 servers as suitable for uploading extra-info documents. [Bugfix
34468 o Minor bugfixes (dns):
34469 - Fix a crash when DNSPort is set more than once. (Patch from Robert
34470 Hogan.) [Bugfix on 0.2.0.2-alpha]
34471 - Add DNSPort connections to the global connection list, so that we
34472 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
34474 - Fix a dangling reference that could lead to a crash when DNSPort is
34475 changed or closed (Patch from Robert Hogan.) [Bugfix on
34478 o Minor bugfixes (controller):
34479 - Provide DNS expiry times in GMT, not in local time. For backward
34480 compatibility, ADDRMAP events only provide GMT expiry in an extended
34481 field. "GETINFO address-mappings" always does the right thing.
34482 - Use CRLF line endings properly in NS events.
34483 - Terminate multi-line control events properly. (Original patch
34484 from tup.) [Bugfix on 0.1.2.x-alpha]
34485 - Do not include spaces in SOURCE_ADDR fields in STREAM
34486 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
34489 Changes in version 0.1.2.15 - 2007-07-17
34490 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
34491 problems, fixes compilation on BSD, and fixes a variety of other
34492 bugs. Everybody should upgrade.
34494 o Major bugfixes (compilation):
34495 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
34497 o Major bugfixes (crashes):
34498 - Try even harder not to dereference the first character after
34499 an mmap(). Reported by lodger.
34500 - Fix a crash bug in directory authorities when we re-number the
34501 routerlist while inserting a new router.
34502 - When the cached-routers file is an even multiple of the page size,
34503 don't run off the end and crash. (Fixes bug 455; based on idea
34505 - Fix eventdns.c behavior on Solaris: It is critical to include
34506 orconfig.h _before_ sys/types.h, so that we can get the expected
34507 definition of _FILE_OFFSET_BITS.
34509 o Major bugfixes (security):
34510 - Fix a possible buffer overrun when using BSD natd support. Bug
34512 - When sending destroy cells from a circuit's origin, don't include
34513 the reason for tearing down the circuit. The spec says we didn't,
34514 and now we actually don't. Reported by lodger.
34515 - Keep streamids from different exits on a circuit separate. This
34516 bug may have allowed other routers on a given circuit to inject
34517 cells into streams. Reported by lodger; fixes bug 446.
34518 - If there's a never-before-connected-to guard node in our list,
34519 never choose any guards past it. This way we don't expand our
34520 guard list unless we need to.
34522 o Minor bugfixes (guard nodes):
34523 - Weight guard selection by bandwidth, so that low-bandwidth nodes
34524 don't get overused as guards.
34526 o Minor bugfixes (directory):
34527 - Correctly count the number of authorities that recommend each
34528 version. Previously, we were under-counting by 1.
34529 - Fix a potential crash bug when we load many server descriptors at
34530 once and some of them make others of them obsolete. Fixes bug 458.
34532 o Minor bugfixes (hidden services):
34533 - Stop tearing down the whole circuit when the user asks for a
34534 connection to a port that the hidden service didn't configure.
34537 o Minor bugfixes (misc):
34538 - On Windows, we were preventing other processes from reading
34539 cached-routers while Tor was running. Reported by janbar.
34540 - Fix a possible (but very unlikely) bug in picking routers by
34541 bandwidth. Add a log message to confirm that it is in fact
34542 unlikely. Patch from lodger.
34543 - Backport a couple of memory leak fixes.
34544 - Backport miscellaneous cosmetic bugfixes.
34547 Changes in version 0.2.0.2-alpha - 2007-06-02
34548 o Major bugfixes on 0.2.0.1-alpha:
34549 - Fix an assertion failure related to servers without extra-info digests.
34550 Resolves bugs 441 and 442.
34552 o Minor features (directory):
34553 - Support "If-Modified-Since" when answering HTTP requests for
34554 directories, running-routers documents, and network-status documents.
34555 (There's no need to support it for router descriptors, since those
34556 are downloaded by descriptor digest.)
34558 o Minor build issues:
34559 - Clear up some MIPSPro compiler warnings.
34560 - When building from a tarball on a machine that happens to have SVK
34561 installed, report the micro-revision as whatever version existed
34562 in the tarball, not as "x".
34565 Changes in version 0.2.0.1-alpha - 2007-06-01
34566 This early development snapshot provides new features for people running
34567 Tor as both a client and a server (check out the new RelayBandwidth
34568 config options); lets Tor run as a DNS proxy; and generally moves us
34569 forward on a lot of fronts.
34571 o Major features, server usability:
34572 - New config options RelayBandwidthRate and RelayBandwidthBurst:
34573 a separate set of token buckets for relayed traffic. Right now
34574 relayed traffic is defined as answers to directory requests, and
34575 OR connections that don't have any local circuits on them.
34577 o Major features, client usability:
34578 - A client-side DNS proxy feature to replace the need for
34579 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
34580 for DNS requests on port 9999, use the Tor network to resolve them
34581 anonymously, and send the reply back like a regular DNS server.
34582 The code still only implements a subset of DNS.
34583 - Make PreferTunneledDirConns and TunnelDirConns work even when
34584 we have no cached directory info. This means Tor clients can now
34585 do all of their connections protected by TLS.
34587 o Major features, performance and efficiency:
34588 - Directory authorities accept and serve "extra info" documents for
34589 routers. These documents contain fields from router descriptors
34590 that aren't usually needed, and that use a lot of excess
34591 bandwidth. Once these fields are removed from router descriptors,
34592 the bandwidth savings should be about 60%. [Partially implements
34594 - Servers upload extra-info documents to any authority that accepts
34595 them. Authorities (and caches that have been configured to download
34596 extra-info documents) download them as needed. [Partially implements
34598 - Change the way that Tor buffers data that it is waiting to write.
34599 Instead of queueing data cells in an enormous ring buffer for each
34600 client->OR or OR->OR connection, we now queue cells on a separate
34601 queue for each circuit. This lets us use less slack memory, and
34602 will eventually let us be smarter about prioritizing different kinds
34604 - Use memory pools to allocate cells with better speed and memory
34605 efficiency, especially on platforms where malloc() is inefficient.
34606 - Stop reading on edge connections when their corresponding circuit
34607 buffers are full; start again as the circuits empty out.
34609 o Major features, other:
34610 - Add an HSAuthorityRecordStats option that hidden service authorities
34611 can use to track statistics of overall hidden service usage without
34612 logging information that would be very useful to an attacker.
34613 - Start work implementing multi-level keys for directory authorities:
34614 Add a standalone tool to generate key certificates. (Proposal 103.)
34617 - Directory authorities now call routers Stable if they have an
34618 uptime of at least 30 days, even if that's not the median uptime
34619 in the network. Implements proposal 107, suggested by Kevin Bauer
34622 o Minor fixes (resource management):
34623 - Count the number of open sockets separately from the number
34624 of active connection_t objects. This will let us avoid underusing
34625 our allocated connection limit.
34626 - We no longer use socket pairs to link an edge connection to an
34627 anonymous directory connection or a DirPort test connection.
34628 Instead, we track the link internally and transfer the data
34629 in-process. This saves two sockets per "linked" connection (at the
34630 client and at the server), and avoids the nasty Windows socketpair()
34632 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
34633 for every single inactive connection_t. Free items from the
34634 4k/16k-buffer free lists when they haven't been used for a while.
34636 o Minor features (build):
34637 - Make autoconf search for libevent, openssl, and zlib consistently.
34638 - Update deprecated macros in configure.in.
34639 - When warning about missing headers, tell the user to let us
34640 know if the compile succeeds anyway, so we can downgrade the
34642 - Include the current subversion revision as part of the version
34643 string: either fetch it directly if we're in an SVN checkout, do
34644 some magic to guess it if we're in an SVK checkout, or use
34645 the last-detected version if we're building from a .tar.gz.
34646 Use this version consistently in log messages.
34648 o Minor features (logging):
34649 - Always prepend "Bug: " to any log message about a bug.
34650 - Put a platform string (e.g. "Linux i686") in the startup log
34651 message, so when people paste just their logs, we know if it's
34652 OpenBSD or Windows or what.
34653 - When logging memory usage, break down memory used in buffers by
34656 o Minor features (directory system):
34657 - New config option V2AuthoritativeDirectory that all directory
34658 authorities should set. This will let future authorities choose
34659 not to serve V2 directory information.
34660 - Directory authorities allow multiple router descriptors and/or extra
34661 info documents to be uploaded in a single go. This will make
34662 implementing proposal 104 simpler.
34664 o Minor features (controller):
34665 - Add a new config option __DisablePredictedCircuits designed for
34666 use by the controller, when we don't want Tor to build any circuits
34668 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
34669 so we can exit from the middle of the circuit.
34670 - Implement "getinfo status/circuit-established".
34671 - Implement "getinfo status/version/..." so a controller can tell
34672 whether the current version is recommended, and whether any versions
34673 are good, and how many authorities agree. (Patch from shibz.)
34675 o Minor features (hidden services):
34676 - Allow multiple HiddenServicePort directives with the same virtual
34677 port; when they occur, the user is sent round-robin to one
34678 of the target ports chosen at random. Partially fixes bug 393 by
34679 adding limited ad-hoc round-robining.
34681 o Minor features (other):
34683 - Add a new AutomapHostsOnResolve option: when it is enabled, any
34684 resolve request for hosts matching a given pattern causes Tor to
34685 generate an internal virtual address mapping for that host. This
34686 allows DNSPort to work sensibly with hidden service users. By
34687 default, .exit and .onion addresses are remapped; the list of
34688 patterns can be reconfigured with AutomapHostsSuffixes.
34689 - Add an "-F" option to tor-resolve to force a resolve for a .onion
34690 address. Thanks to the AutomapHostsOnResolve option, this is no
34691 longer a completely silly thing to do.
34692 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
34693 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
34694 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
34695 minus 1 byte: the actual maximum declared bandwidth.
34697 o Removed features:
34698 - Removed support for the old binary "version 0" controller protocol.
34699 This has been deprecated since 0.1.1, and warnings have been issued
34700 since 0.1.2. When we encounter a v0 control message, we now send
34701 back an error and close the connection.
34702 - Remove the old "dns worker" server DNS code: it hasn't been default
34703 since 0.1.2.2-alpha, and all the servers seem to be using the new
34706 o Minor bugfixes (portability):
34707 - Even though Windows is equally happy with / and \ as path separators,
34708 try to use \ consistently on Windows and / consistently on Unix: it
34709 makes the log messages nicer.
34710 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
34711 - Read resolv.conf files correctly on platforms where read() returns
34712 partial results on small file reads.
34714 o Minor bugfixes (directory):
34715 - Correctly enforce that elements of directory objects do not appear
34716 more often than they are allowed to appear.
34717 - When we are reporting the DirServer line we just parsed, we were
34718 logging the second stanza of the key fingerprint, not the first.
34720 o Minor bugfixes (logging):
34721 - When we hit an EOF on a log (probably because we're shutting down),
34722 don't try to remove the log from the list: just mark it as
34723 unusable. (Bulletproofs against bug 222.)
34725 o Minor bugfixes (other):
34726 - In the exitlist script, only consider the most recently published
34727 server descriptor for each server. Also, when the user requests
34728 a list of servers that _reject_ connections to a given address,
34729 explicitly exclude the IPs that also have servers that accept
34730 connections to that address. (Resolves bug 405.)
34731 - Stop allowing hibernating servers to be "stable" or "fast".
34732 - On Windows, we were preventing other processes from reading
34733 cached-routers while Tor was running. (Reported by janbar)
34734 - Make the NodeFamilies config option work. (Reported by
34735 lodger -- it has never actually worked, even though we added it
34737 - Check return values from pthread_mutex functions.
34738 - Don't save non-general-purpose router descriptors to the disk cache,
34739 because we have no way of remembering what their purpose was when
34741 - Add even more asserts to hunt down bug 417.
34742 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
34743 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
34744 Add a log message to confirm that it is in fact unlikely.
34746 o Minor bugfixes (controller):
34747 - Make 'getinfo fingerprint' return a 551 error if we're not a
34748 server, so we match what the control spec claims we do. Reported
34750 - Fix a typo in an error message when extendcircuit fails that
34751 caused us to not follow the \r\n-based delimiter protocol. Reported
34754 o Code simplifications and refactoring:
34755 - Stop passing around circuit_t and crypt_path_t pointers that are
34756 implicit in other procedure arguments.
34757 - Drop the old code to choke directory connections when the
34758 corresponding OR connections got full: thanks to the cell queue
34759 feature, OR conns don't get full any more.
34760 - Make dns_resolve() handle attaching connections to circuits
34761 properly, so the caller doesn't have to.
34762 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
34763 - Keep the connection array as a dynamic smartlist_t, rather than as
34764 a fixed-sized array. This is important, as the number of connections
34765 is becoming increasingly decoupled from the number of sockets.
34768 Changes in version 0.1.2.14 - 2007-05-25
34769 Tor 0.1.2.14 changes the addresses of two directory authorities (this
34770 change especially affects those who serve or use hidden services),
34771 and fixes several other crash- and security-related bugs.
34773 o Directory authority changes:
34774 - Two directory authorities (moria1 and moria2) just moved to new
34775 IP addresses. This change will particularly affect those who serve
34776 or use hidden services.
34778 o Major bugfixes (crashes):
34779 - If a directory server runs out of space in the connection table
34780 as it's processing a begin_dir request, it will free the exit stream
34781 but leave it attached to the circuit, leading to unpredictable
34782 behavior. (Reported by seeess, fixes bug 425.)
34783 - Fix a bug in dirserv_remove_invalid() that would cause authorities
34784 to corrupt memory under some really unlikely scenarios.
34785 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
34786 - Avoid segfaults when reading from mmaped descriptor file. (Reported
34789 o Major bugfixes (security):
34790 - When choosing an entry guard for a circuit, avoid using guards
34791 that are in the same family as the chosen exit -- not just guards
34792 that are exactly the chosen exit. (Reported by lodger.)
34794 o Major bugfixes (resource management):
34795 - If a directory authority is down, skip it when deciding where to get
34796 networkstatus objects or descriptors. Otherwise we keep asking
34797 every 10 seconds forever. Fixes bug 384.
34798 - Count it as a failure if we fetch a valid network-status but we
34799 don't want to keep it. Otherwise we'll keep fetching it and keep
34800 not wanting to keep it. Fixes part of bug 422.
34801 - If all of our dirservers have given us bad or no networkstatuses
34802 lately, then stop hammering them once per minute even when we
34803 think they're failed. Fixes another part of bug 422.
34806 - Actually set the purpose correctly for descriptors inserted with
34807 purpose=controller.
34808 - When we have k non-v2 authorities in our DirServer config,
34809 we ignored the last k authorities in the list when updating our
34811 - Correctly back-off from requesting router descriptors that we are
34812 having a hard time downloading.
34813 - Read resolv.conf files correctly on platforms where read() returns
34814 partial results on small file reads.
34815 - Don't rebuild the entire router store every time we get 32K of
34816 routers: rebuild it when the journal gets very large, or when
34817 the gaps in the store get very large.
34820 - When routers publish SVN revisions in their router descriptors,
34821 authorities now include those versions correctly in networkstatus
34823 - Warn when using a version of libevent before 1.3b to run a server on
34824 OSX or BSD: these versions interact badly with userspace threads.
34827 Changes in version 0.1.2.13 - 2007-04-24
34828 This release features some major anonymity fixes, such as safer path
34829 selection; better client performance; faster bootstrapping, better
34830 address detection, and better DNS support for servers; write limiting as
34831 well as read limiting to make servers easier to run; and a huge pile of
34832 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
34834 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
34835 of the Freenode IRC network, remembering his patience and vision for
34836 free speech on the Internet.
34839 - Fix a memory leak when we ask for "all" networkstatuses and we
34840 get one we don't recognize.
34841 - Add more asserts to hunt down bug 417.
34842 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
34845 Changes in version 0.1.2.12-rc - 2007-03-16
34847 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
34848 directory information requested inside Tor connections (i.e. via
34849 begin_dir cells). It only triggered when the same connection was
34850 serving other data at the same time. Reported by seeess.
34853 - When creating a circuit via the controller, send a 'launched'
34854 event when we're done, so we follow the spec better.
34857 Changes in version 0.1.2.11-rc - 2007-03-15
34858 o Minor bugfixes (controller), reported by daejees:
34859 - Correct the control spec to match how the code actually responds
34860 to 'getinfo addr-mappings/*'.
34861 - The control spec described a GUARDS event, but the code
34862 implemented a GUARD event. Standardize on GUARD, but let people
34863 ask for GUARDS too.
34866 Changes in version 0.1.2.10-rc - 2007-03-07
34867 o Major bugfixes (Windows):
34868 - Do not load the NT services library functions (which may not exist)
34869 just to detect if we're a service trying to shut down. Now we run
34870 on Win98 and friends again.
34872 o Minor bugfixes (other):
34873 - Clarify a couple of log messages.
34874 - Fix a misleading socks5 error number.
34877 Changes in version 0.1.2.9-rc - 2007-03-02
34878 o Major bugfixes (Windows):
34879 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
34880 of the usual GCC "%llu". This prevents a bug when saving 64-bit
34881 int configuration values: the high-order 32 bits would get
34882 truncated. In particular, we were being bitten by the default
34883 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
34884 and maybe also bug 397.)
34886 o Minor bugfixes (performance):
34887 - Use OpenSSL's AES implementation on platforms where it's faster.
34888 This could save us as much as 10% CPU usage.
34890 o Minor bugfixes (server):
34891 - Do not rotate onion key immediately after setting it for the first
34894 o Minor bugfixes (directory authorities):
34895 - Stop calling servers that have been hibernating for a long time
34896 "stable". Also, stop letting hibernating or obsolete servers affect
34897 uptime and bandwidth cutoffs.
34898 - Stop listing hibernating servers in the v1 directory.
34900 o Minor bugfixes (hidden services):
34901 - Upload hidden service descriptors slightly less often, to reduce
34902 load on authorities.
34904 o Minor bugfixes (other):
34905 - Fix an assert that could trigger if a controller quickly set then
34906 cleared EntryNodes. Bug found by Udo van den Heuvel.
34907 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
34909 - Fix a potential race condition in the rpm installer. Found by
34911 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
34912 of 2 as indicating that the server is completely bad; it sometimes
34913 means that the server is just bad for the request in question. (may fix
34914 the last of bug 326.)
34915 - Disable encrypted directory connections when we don't have a server
34916 descriptor for the destination. We'll get this working again in
34920 Changes in version 0.1.2.8-beta - 2007-02-26
34921 o Major bugfixes (crashes):
34922 - Stop crashing when the controller asks us to resetconf more than
34923 one config option at once. (Vidalia 0.0.11 does this.)
34924 - Fix a crash that happened on Win98 when we're given command-line
34925 arguments: don't try to load NT service functions from advapi32.dll
34926 except when we need them. (Bug introduced in 0.1.2.7-alpha;
34928 - Fix a longstanding obscure crash bug that could occur when
34929 we run out of DNS worker processes. (Resolves bug 390.)
34931 o Major bugfixes (hidden services):
34932 - Correctly detect whether hidden service descriptor downloads are
34933 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
34935 o Major bugfixes (accounting):
34936 - When we start during an accounting interval before it's time to wake
34937 up, remember to wake up at the correct time. (May fix bug 342.)
34939 o Minor bugfixes (controller):
34940 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
34941 clear the corresponding on_circuit variable, and remember later
34942 that we don't need to send a redundant CLOSED event. Resolves part
34944 - Report events where a resolve succeeded or where we got a socks
34945 protocol error correctly, rather than calling both of them
34947 - Change reported stream target addresses to IP consistently when
34948 we finally get the IP from an exit node.
34949 - Send log messages to the controller even if they happen to be very
34952 o Minor bugfixes (other):
34953 - Display correct results when reporting which versions are
34954 recommended, and how recommended they are. (Resolves bug 383.)
34955 - Improve our estimates for directory bandwidth to be less random:
34956 guess that an unrecognized directory will have the average bandwidth
34957 from all known directories, not that it will have the average
34958 bandwidth from those directories earlier than it on the list.
34959 - If we start a server with ClientOnly 1, then set ClientOnly to 0
34960 and hup, stop triggering an assert based on an empty onion_key.
34961 - On platforms with no working mmap() equivalent, don't warn the
34962 user when cached-routers doesn't exist.
34963 - Warn the user when mmap() [or its equivalent] fails for some reason
34964 other than file-not-found.
34965 - Don't warn the user when cached-routers.new doesn't exist: that's
34966 perfectly fine when starting up for the first time.
34967 - When EntryNodes are configured, rebuild the guard list to contain,
34968 in order: the EntryNodes that were guards before; the rest of the
34969 EntryNodes; the nodes that were guards before.
34970 - Mask out all signals in sub-threads; only the libevent signal
34971 handler should be processing them. This should prevent some crashes
34972 on some machines using pthreads. (Patch from coderman.)
34973 - Fix switched arguments on memset in the implementation of
34974 tor_munmap() for systems with no mmap() call.
34975 - When Tor receives a router descriptor that it asked for, but
34976 no longer wants (because it has received fresh networkstatuses
34977 in the meantime), do not warn the user. Cache the descriptor if
34978 we're a cache; drop it if we aren't.
34979 - Make earlier entry guards _really_ get retried when the network
34981 - On a malformed DNS reply, always give an error to the corresponding
34983 - Build with recent libevents on platforms that do not define the
34984 nonstandard types "u_int8_t" and friends.
34986 o Minor features (controller):
34987 - Warn the user when an application uses the obsolete binary v0
34988 control protocol. We're planning to remove support for it during
34989 the next development series, so it's good to give people some
34991 - Add STREAM_BW events to report per-entry-stream bandwidth
34992 use. (Patch from Robert Hogan.)
34993 - Rate-limit SIGNEWNYM signals in response to controllers that
34994 impolitely generate them for every single stream. (Patch from
34995 mwenge; closes bug 394.)
34996 - Make REMAP stream events have a SOURCE (cache or exit), and
34997 make them generated in every case where we get a successful
34998 connected or resolved cell.
35000 o Minor bugfixes (performance):
35001 - Call router_have_min_dir_info half as often. (This is showing up in
35002 some profiles, but not others.)
35003 - When using GCC, make log_debug never get called at all, and its
35004 arguments never get evaluated, when no debug logs are configured.
35005 (This is showing up in some profiles, but not others.)
35008 - Remove some never-implemented options. Mark PathlenCoinWeight as
35010 - Implement proposal 106: Stop requiring clients to have well-formed
35011 certificates; stop checking nicknames in certificates. (Clients
35012 have certificates so that they can look like Tor servers, but in
35013 the future we might want to allow them to look like regular TLS
35014 clients instead. Nicknames in certificates serve no purpose other
35015 than making our protocol easier to recognize on the wire.)
35016 - Revise messages on handshake failure again to be even more clear about
35017 which are incoming connections and which are outgoing.
35018 - Discard any v1 directory info that's over 1 month old (for
35019 directories) or over 1 week old (for running-routers lists).
35020 - Do not warn when individual nodes in the configuration's EntryNodes,
35021 ExitNodes, etc are down: warn only when all possible nodes
35022 are down. (Fixes bug 348.)
35023 - Always remove expired routers and networkstatus docs before checking
35024 whether we have enough information to build circuits. (Fixes
35026 - Put a lower-bound on MaxAdvertisedBandwidth.
35029 Changes in version 0.1.2.7-alpha - 2007-02-06
35030 o Major bugfixes (rate limiting):
35031 - Servers decline directory requests much more aggressively when
35032 they're low on bandwidth. Otherwise they end up queueing more and
35033 more directory responses, which can't be good for latency.
35034 - But never refuse directory requests from local addresses.
35035 - Fix a memory leak when sending a 503 response for a networkstatus
35037 - Be willing to read or write on local connections (e.g. controller
35038 connections) even when the global rate limiting buckets are empty.
35039 - If our system clock jumps back in time, don't publish a negative
35040 uptime in the descriptor. Also, don't let the global rate limiting
35041 buckets go absurdly negative.
35042 - Flush local controller connection buffers periodically as we're
35043 writing to them, so we avoid queueing 4+ megabytes of data before
35046 o Major bugfixes (NT services):
35047 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
35048 command-line flag so that admins can override the default by saying
35049 "tor --service install --user "SomeUser"". This will not affect
35050 existing installed services. Also, warn the user that the service
35051 will look for its configuration file in the service user's
35052 %appdata% directory. (We can't do the 'hardwire the user's appdata
35053 directory' trick any more, since we may not have read access to that
35056 o Major bugfixes (other):
35057 - Previously, we would cache up to 16 old networkstatus documents
35058 indefinitely, if they came from nontrusted authorities. Now we
35059 discard them if they are more than 10 days old.
35060 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
35062 - Detect and reject malformed DNS responses containing circular
35064 - If exits are rare enough that we're not marking exits as guards,
35065 ignore exit bandwidth when we're deciding the required bandwidth
35067 - When we're handling a directory connection tunneled over Tor,
35068 don't fill up internal memory buffers with all the data we want
35069 to tunnel; instead, only add it if the OR connection that will
35070 eventually receive it has some room for it. (This can lead to
35071 slowdowns in tunneled dir connections; a better solution will have
35072 to wait for 0.2.0.)
35074 o Minor bugfixes (dns):
35075 - Add some defensive programming to eventdns.c in an attempt to catch
35076 possible memory-stomping bugs.
35077 - Detect and reject DNS replies containing IPv4 or IPv6 records with
35078 an incorrect number of bytes. (Previously, we would ignore the
35080 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
35081 in the correct order, and doesn't crash.
35082 - Free memory held in recently-completed DNS lookup attempts on exit.
35083 This was not a memory leak, but may have been hiding memory leaks.
35084 - Handle TTL values correctly on reverse DNS lookups.
35085 - Treat failure to parse resolv.conf as an error.
35087 o Minor bugfixes (other):
35088 - Fix crash with "tor --list-fingerprint" (reported by seeess).
35089 - When computing clock skew from directory HTTP headers, consider what
35090 time it was when we finished asking for the directory, not what
35092 - Expire socks connections if they spend too long waiting for the
35093 handshake to finish. Previously we would let them sit around for
35094 days, if the connecting application didn't close them either.
35095 - And if the socks handshake hasn't started, don't send a
35096 "DNS resolve socks failed" handshake reply; just close it.
35097 - Stop using C functions that OpenBSD's linker doesn't like.
35098 - Don't launch requests for descriptors unless we have networkstatuses
35099 from at least half of the authorities. This delays the first
35100 download slightly under pathological circumstances, but can prevent
35101 us from downloading a bunch of descriptors we don't need.
35102 - Do not log IPs with TLS failures for incoming TLS
35103 connections. (Fixes bug 382.)
35104 - If the user asks to use invalid exit nodes, be willing to use
35106 - Stop using the reserved ac_cv namespace in our configure script.
35107 - Call stat() slightly less often; use fstat() when possible.
35108 - Refactor the way we handle pending circuits when an OR connection
35109 completes or fails, in an attempt to fix a rare crash bug.
35110 - Only rewrite a conn's address based on X-Forwarded-For: headers
35111 if it's a parseable public IP address; and stop adding extra quotes
35112 to the resulting address.
35115 - Weight directory requests by advertised bandwidth. Now we can
35116 let servers enable write limiting but still allow most clients to
35117 succeed at their directory requests. (We still ignore weights when
35118 choosing a directory authority; I hope this is a feature.)
35121 - Create a new file ReleaseNotes which was the old ChangeLog. The
35122 new ChangeLog file now includes the summaries for all development
35124 - Check for addresses with invalid characters at the exit as well
35125 as at the client, and warn less verbosely when they fail. You can
35126 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
35127 - Adapt a patch from goodell to let the contrib/exitlist script
35128 take arguments rather than require direct editing.
35129 - Inform the server operator when we decide not to advertise a
35130 DirPort due to AccountingMax enabled or a low BandwidthRate. It
35131 was confusing Zax, so now we're hopefully more helpful.
35132 - Bring us one step closer to being able to establish an encrypted
35133 directory tunnel without knowing a descriptor first. Still not
35134 ready yet. As part of the change, now assume we can use a
35135 create_fast cell if we don't know anything about a router.
35136 - Allow exit nodes to use nameservers running on ports other than 53.
35137 - Servers now cache reverse DNS replies.
35138 - Add an --ignore-missing-torrc command-line option so that we can
35139 get the "use sensible defaults if the configuration file doesn't
35140 exist" behavior even when specifying a torrc location on the command
35143 o Minor features (controller):
35144 - Track reasons for OR connection failure; make these reasons
35145 available via the controller interface. (Patch from Mike Perry.)
35146 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
35147 can learn when clients are sending malformed hostnames to Tor.
35148 - Clean up documentation for controller status events.
35149 - Add a REMAP status to stream events to note that a stream's
35150 address has changed because of a cached address or a MapAddress
35154 Changes in version 0.1.2.6-alpha - 2007-01-09
35156 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
35157 connection handles more than 4 gigs in either direction, we crash.
35158 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
35159 advertised exit node, somebody might try to exit from us when
35160 we're bootstrapping and before we've built our descriptor yet.
35161 Refuse the connection rather than crashing.
35164 - Warn if we (as a server) find that we've resolved an address that we
35165 weren't planning to resolve.
35166 - Warn that using select() on any libevent version before 1.1 will be
35167 unnecessarily slow (even for select()).
35168 - Flush ERR-level controller status events just like we currently
35169 flush ERR-level log events, so that a Tor shutdown doesn't prevent
35170 the controller from learning about current events.
35172 o Minor features (more controller status events):
35173 - Implement EXTERNAL_ADDRESS server status event so controllers can
35174 learn when our address changes.
35175 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
35176 can learn when directories reject our descriptor.
35177 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
35178 can learn when a client application is speaking a non-socks protocol
35180 - Implement DANGEROUS_SOCKS client status event so controllers
35181 can learn when a client application is leaking DNS addresses.
35182 - Implement BUG general status event so controllers can learn when
35183 Tor is unhappy about its internal invariants.
35184 - Implement CLOCK_SKEW general status event so controllers can learn
35185 when Tor thinks the system clock is set incorrectly.
35186 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
35187 server status events so controllers can learn when their descriptors
35188 are accepted by a directory.
35189 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
35190 server status events so controllers can learn about Tor's progress in
35191 deciding whether it's reachable from the outside.
35192 - Implement BAD_LIBEVENT general status event so controllers can learn
35193 when we have a version/method combination in libevent that needs to
35195 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
35196 and DNS_USELESS server status events so controllers can learn
35197 about changes to DNS server status.
35199 o Minor features (directory):
35200 - Authorities no longer recommend exits as guards if this would shift
35201 too much load to the exit nodes.
35204 Changes in version 0.1.2.5-alpha - 2007-01-06
35206 - Enable write limiting as well as read limiting. Now we sacrifice
35207 capacity if we're pushing out lots of directory traffic, rather
35208 than overrunning the user's intended bandwidth limits.
35209 - Include TLS overhead when counting bandwidth usage; previously, we
35210 would count only the bytes sent over TLS, but not the bytes used
35212 - Support running the Tor service with a torrc not in the same
35213 directory as tor.exe and default to using the torrc located in
35214 the %appdata%\Tor\ of the user who installed the service. Patch
35216 - Servers now check for the case when common DNS requests are going to
35217 wildcarded addresses (i.e. all getting the same answer), and change
35218 their exit policy to reject *:* if it's happening.
35219 - Implement BEGIN_DIR cells, so we can connect to the directory
35220 server via TLS to do encrypted directory requests rather than
35221 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
35222 config options if you like.
35224 o Minor features (config and docs):
35225 - Start using the state file to store bandwidth accounting data:
35226 the bw_accounting file is now obsolete. We'll keep generating it
35227 for a while for people who are still using 0.1.2.4-alpha.
35228 - Try to batch changes to the state file so that we do as few
35229 disk writes as possible while still storing important things in
35231 - The state file and the bw_accounting file get saved less often when
35232 the AvoidDiskWrites config option is set.
35233 - Make PIDFile work on Windows (untested).
35234 - Add internal descriptions for a bunch of configuration options:
35235 accessible via controller interface and in comments in saved
35237 - Reject *:563 (NNTPS) in the default exit policy. We already reject
35238 NNTP by default, so this seems like a sensible addition.
35239 - Clients now reject hostnames with invalid characters. This should
35240 avoid some inadvertent info leaks. Add an option
35241 AllowNonRFC953Hostnames to disable this behavior, in case somebody
35242 is running a private network with hosts called @, !, and #.
35243 - Add a maintainer script to tell us which options are missing
35244 documentation: "make check-docs".
35245 - Add a new address-spec.txt document to describe our special-case
35246 addresses: .exit, .onion, and .noconnnect.
35248 o Minor features (DNS):
35249 - Ongoing work on eventdns infrastructure: now it has dns server
35250 and ipv6 support. One day Tor will make use of it.
35251 - Add client-side caching for reverse DNS lookups.
35252 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
35253 - When we change nameservers or IP addresses, reset and re-launch
35254 our tests for DNS hijacking.
35256 o Minor features (directory):
35257 - Authorities now specify server versions in networkstatus. This adds
35258 about 2% to the size of compressed networkstatus docs, and allows
35259 clients to tell which servers support BEGIN_DIR and which don't.
35260 The implementation is forward-compatible with a proposed future
35261 protocol version scheme not tied to Tor versions.
35262 - DirServer configuration lines now have an orport= option so
35263 clients can open encrypted tunnels to the authorities without
35264 having downloaded their descriptors yet. Enabled for moria1,
35265 moria2, tor26, and lefkada now in the default configuration.
35266 - Directory servers are more willing to send a 503 "busy" if they
35267 are near their write limit, especially for v1 directory requests.
35268 Now they can use their limited bandwidth for actual Tor traffic.
35269 - Clients track responses with status 503 from dirservers. After a
35270 dirserver has given us a 503, we try not to use it until an hour has
35271 gone by, or until we have no dirservers that haven't given us a 503.
35272 - When we get a 503 from a directory, and we're not a server, we don't
35273 count the failure against the total number of failures allowed
35274 for the thing we're trying to download.
35275 - Report X-Your-Address-Is correctly from tunneled directory
35276 connections; don't report X-Your-Address-Is when it's an internal
35277 address; and never believe reported remote addresses when they're
35279 - Protect against an unlikely DoS attack on directory servers.
35280 - Add a BadDirectory flag to network status docs so that authorities
35281 can (eventually) tell clients about caches they believe to be
35284 o Minor features (controller):
35285 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
35286 - Reimplement GETINFO so that info/names stays in sync with the
35288 - Implement "GETINFO fingerprint".
35289 - Implement "SETEVENTS GUARD" so controllers can get updates on
35290 entry guard status as it changes.
35292 o Minor features (clean up obsolete pieces):
35293 - Remove some options that have been deprecated since at least
35294 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
35295 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
35296 to set log options.
35297 - We no longer look for identity and onion keys in "identity.key" and
35298 "onion.key" -- these were replaced by secret_id_key and
35299 secret_onion_key in 0.0.8pre1.
35300 - We no longer require unrecognized directory entries to be
35303 o Major bugfixes (security):
35304 - Stop sending the HttpProxyAuthenticator string to directory
35305 servers when directory connections are tunnelled through Tor.
35306 - Clients no longer store bandwidth history in the state file.
35307 - Do not log introduction points for hidden services if SafeLogging
35309 - When generating bandwidth history, round down to the nearest
35310 1k. When storing accounting data, round up to the nearest 1k.
35311 - When we're running as a server, remember when we last rotated onion
35312 keys, so that we will rotate keys once they're a week old even if
35313 we never stay up for a week ourselves.
35315 o Major bugfixes (other):
35316 - Fix a longstanding bug in eventdns that prevented the count of
35317 timed-out resolves from ever being reset. This bug caused us to
35318 give up on a nameserver the third time it timed out, and try it
35319 10 seconds later... and to give up on it every time it timed out
35321 - Take out the '5 second' timeout from the connection retry
35322 schedule. Now the first connect attempt will wait a full 10
35323 seconds before switching to a new circuit. Perhaps this will help
35324 a lot. Based on observations from Mike Perry.
35325 - Fix a bug on the Windows implementation of tor_mmap_file() that
35326 would prevent the cached-routers file from ever loading. Reported
35330 - Fix an assert failure when a directory authority sets
35331 AuthDirRejectUnlisted and then receives a descriptor from an
35332 unlisted router. Reported by seeess.
35333 - Avoid a double-free when parsing malformed DirServer lines.
35334 - Fix a bug when a BSD-style PF socket is first used. Patch from
35336 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35337 to resolve an address at a given exit node even when they ask for
35339 - Servers no longer ever list themselves in their "family" line,
35340 even if configured to do so. This makes it easier to configure
35341 family lists conveniently.
35342 - When running as a server, don't fall back to 127.0.0.1 when no
35343 nameservers are configured in /etc/resolv.conf; instead, make the
35344 user fix resolv.conf or specify nameservers explicitly. (Resolves
35346 - Stop accepting certain malformed ports in configured exit policies.
35347 - Don't re-write the fingerprint file every restart, unless it has
35349 - Stop warning when a single nameserver fails: only warn when _all_ of
35350 our nameservers have failed. Also, when we only have one nameserver,
35351 raise the threshold for deciding that the nameserver is dead.
35352 - Directory authorities now only decide that routers are reachable
35353 if their identity keys are as expected.
35354 - When the user uses bad syntax in the Log config line, stop
35355 suggesting other bad syntax as a replacement.
35356 - Correctly detect ipv6 DNS capability on OpenBSD.
35358 o Minor bugfixes (controller):
35359 - Report the circuit number correctly in STREAM CLOSED events. Bug
35360 reported by Mike Perry.
35361 - Do not report bizarre values for results of accounting GETINFOs
35362 when the last second's write or read exceeds the allotted bandwidth.
35363 - Report "unrecognized key" rather than an empty string when the
35364 controller tries to fetch a networkstatus that doesn't exist.
35367 Changes in version 0.1.1.26 - 2006-12-14
35368 o Security bugfixes:
35369 - Stop sending the HttpProxyAuthenticator string to directory
35370 servers when directory connections are tunnelled through Tor.
35371 - Clients no longer store bandwidth history in the state file.
35372 - Do not log introduction points for hidden services if SafeLogging
35376 - Fix an assert failure when a directory authority sets
35377 AuthDirRejectUnlisted and then receives a descriptor from an
35378 unlisted router (reported by seeess).
35381 Changes in version 0.1.2.4-alpha - 2006-12-03
35383 - Add support for using natd; this allows FreeBSDs earlier than
35384 5.1.2 to have ipfw send connections through Tor without using
35385 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
35388 - Make all connections to addresses of the form ".noconnect"
35389 immediately get closed. This lets application/controller combos
35390 successfully test whether they're talking to the same Tor by
35391 watching for STREAM events.
35392 - Make cross.sh cross-compilation script work even when autogen.sh
35393 hasn't been run. (Patch from Michael Mohr.)
35394 - Statistics dumped by -USR2 now include a breakdown of public key
35395 operations, for profiling.
35398 - Fix a major leak when directory authorities parse their
35399 approved-routers list, a minor memory leak when we fail to pick
35400 an exit node, and a few rare leaks on errors.
35401 - Handle TransPort connections even when the server sends data before
35402 the client sends data. Previously, the connection would just hang
35403 until the client sent data. (Patch from tup based on patch from
35405 - Avoid assert failure when our cached-routers file is empty on
35409 - Don't log spurious warnings when we see a circuit close reason we
35410 don't recognize; it's probably just from a newer version of Tor.
35411 - Have directory authorities allow larger amounts of drift in uptime
35412 without replacing the server descriptor: previously, a server that
35413 restarted every 30 minutes could have 48 "interesting" descriptors
35415 - Start linking to the Tor specification and Tor reference manual
35416 correctly in the Windows installer.
35417 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35418 Tor/Privoxy we also uninstall Vidalia.
35419 - Resume building on Irix64, and fix a lot of warnings from its
35420 MIPSpro C compiler.
35421 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
35422 when we're running as a client.
35425 Changes in version 0.1.1.25 - 2006-11-04
35427 - When a client asks us to resolve (rather than connect to)
35428 an address, and we have a cached answer, give them the cached
35429 answer. Previously, we would give them no answer at all.
35430 - We were building exactly the wrong circuits when we predict
35431 hidden service requirements, meaning Tor would have to build all
35432 its circuits on demand.
35433 - If none of our live entry guards have a high uptime, but we
35434 require a guard with a high uptime, try adding a new guard before
35435 we give up on the requirement. This patch should make long-lived
35436 connections more stable on average.
35437 - When testing reachability of our DirPort, don't launch new
35438 tests when there's already one in progress -- unreachable
35439 servers were stacking up dozens of testing streams.
35441 o Security bugfixes:
35442 - When the user sends a NEWNYM signal, clear the client-side DNS
35443 cache too. Otherwise we continue to act on previous information.
35446 - Avoid a memory corruption bug when creating a hash table for
35448 - Avoid possibility of controller-triggered crash when misusing
35449 certain commands from a v0 controller on platforms that do not
35450 handle printf("%s",NULL) gracefully.
35451 - Avoid infinite loop on unexpected controller input.
35452 - Don't log spurious warnings when we see a circuit close reason we
35453 don't recognize; it's probably just from a newer version of Tor.
35454 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35455 Tor/Privoxy we also uninstall Vidalia.
35458 Changes in version 0.1.2.3-alpha - 2006-10-29
35460 - Prepare for servers to publish descriptors less often: never
35461 discard a descriptor simply for being too old until either it is
35462 recommended by no authorities, or until we get a better one for
35463 the same router. Make caches consider retaining old recommended
35464 routers for even longer.
35465 - If most authorities set a BadExit flag for a server, clients
35466 don't think of it as a general-purpose exit. Clients only consider
35467 authorities that advertise themselves as listing bad exits.
35468 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
35469 headers for content, so that we can work better in the presence of
35470 caching HTTP proxies.
35471 - Allow authorities to list nodes as bad exits by fingerprint or by
35474 o Minor features, controller:
35475 - Add a REASON field to CIRC events; for backward compatibility, this
35476 field is sent only to controllers that have enabled the extended
35477 event format. Also, add additional reason codes to explain why
35478 a given circuit has been destroyed or truncated. (Patches from
35480 - Add a REMOTE_REASON field to extended CIRC events to tell the
35481 controller about why a remote OR told us to close a circuit.
35482 - Stream events also now have REASON and REMOTE_REASON fields,
35483 working much like those for circuit events.
35484 - There's now a GETINFO ns/... field so that controllers can ask Tor
35485 about the current status of a router.
35486 - A new event type "NS" to inform a controller when our opinion of
35487 a router's status has changed.
35488 - Add a GETINFO events/names and GETINFO features/names so controllers
35489 can tell which events and features are supported.
35490 - A new CLEARDNSCACHE signal to allow controllers to clear the
35491 client-side DNS cache without expiring circuits.
35493 o Security bugfixes:
35494 - When the user sends a NEWNYM signal, clear the client-side DNS
35495 cache too. Otherwise we continue to act on previous information.
35498 - Avoid sending junk to controllers or segfaulting when a controller
35499 uses EVENT_NEW_DESC with verbose nicknames.
35500 - Stop triggering asserts if the controller tries to extend hidden
35501 service circuits (reported by mwenge).
35502 - Avoid infinite loop on unexpected controller input.
35503 - When the controller does a "GETINFO network-status", tell it
35504 about even those routers whose descriptors are very old, and use
35505 long nicknames where appropriate.
35506 - Change NT service functions to be loaded on demand. This lets us
35507 build with MinGW without breaking Tor for Windows 98 users.
35508 - Do DirPort reachability tests less often, since a single test
35509 chews through many circuits before giving up.
35510 - In the hidden service example in torrc.sample, stop recommending
35511 esoteric and discouraged hidden service options.
35512 - When stopping an NT service, wait up to 10 sec for it to actually
35513 stop. Patch from Matt Edman; resolves bug 295.
35514 - Fix handling of verbose nicknames with ORCONN controller events:
35515 make them show up exactly when requested, rather than exactly when
35517 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
35518 printing a duplicate "$" in the keys we send (reported by mwenge).
35519 - Correctly set maximum connection limit on Cygwin. (This time
35521 - Try to detect Windows correctly when cross-compiling.
35522 - Detect the size of the routers file correctly even if it is
35523 corrupted (on systems without mmap) or not page-aligned (on systems
35524 with mmap). This bug was harmless.
35525 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
35526 to open a stream fails; now we do in more cases. This should
35527 make clients able to find a good exit faster in some cases, since
35528 unhandleable requests will now get an error rather than timing out.
35529 - Resolve two memory leaks when rebuilding the on-disk router cache
35530 (reported by fookoowa).
35531 - Clean up minor code warnings suggested by the MIPSpro C compiler,
35532 and reported by some Centos users.
35533 - Controller signals now work on non-Unix platforms that don't define
35534 SIGUSR1 and SIGUSR2 the way we expect.
35535 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
35536 values before failing, and always enables eventdns.
35537 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
35538 Try to fix this in configure.in by checking for most functions
35539 before we check for libevent.
35542 Changes in version 0.1.2.2-alpha - 2006-10-07
35544 - Make our async eventdns library on-by-default for Tor servers,
35545 and plan to deprecate the separate dnsworker threads.
35546 - Add server-side support for "reverse" DNS lookups (using PTR
35547 records so clients can determine the canonical hostname for a given
35548 IPv4 address). Only supported by servers using eventdns; servers
35549 now announce in their descriptors whether they support eventdns.
35550 - Specify and implement client-side SOCKS5 interface for reverse DNS
35551 lookups (see doc/socks-extensions.txt).
35552 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
35553 connect to directory servers through Tor. Previously, clients needed
35554 to find Tor exits to make private connections to directory servers.
35555 - Avoid choosing Exit nodes for entry or middle hops when the
35556 total bandwidth available from non-Exit nodes is much higher than
35557 the total bandwidth available from Exit nodes.
35558 - Workaround for name servers (like Earthlink's) that hijack failing
35559 DNS requests and replace the no-such-server answer with a "helpful"
35560 redirect to an advertising-driven search portal. Also work around
35561 DNS hijackers who "helpfully" decline to hijack known-invalid
35562 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
35563 lets you turn it off.
35564 - Send out a burst of long-range padding cells once we've established
35565 that we're reachable. Spread them over 4 circuits, so hopefully
35566 a few will be fast. This exercises our bandwidth and bootstraps
35567 us into the directory more quickly.
35569 o New/improved config options:
35570 - Add new config option "ResolvConf" to let the server operator
35571 choose an alternate resolve.conf file when using eventdns.
35572 - Add an "EnforceDistinctSubnets" option to control our "exclude
35573 servers on the same /16" behavior. It's still on by default; this
35574 is mostly for people who want to operate private test networks with
35575 all the machines on the same subnet.
35576 - If one of our entry guards is on the ExcludeNodes list, or the
35577 directory authorities don't think it's a good guard, treat it as
35578 if it were unlisted: stop using it as a guard, and throw it off
35579 the guards list if it stays that way for a long time.
35580 - Allow directory authorities to be marked separately as authorities
35581 for the v1 directory protocol, the v2 directory protocol, and
35582 as hidden service directories, to make it easier to retire old
35583 authorities. V1 authorities should set "HSAuthoritativeDir 1"
35584 to continue being hidden service authorities too.
35585 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
35587 o Minor features, controller:
35588 - Fix CIRC controller events so that controllers can learn the
35589 identity digests of non-Named servers used in circuit paths.
35590 - Let controllers ask for more useful identifiers for servers. Instead
35591 of learning identity digests for un-Named servers and nicknames
35592 for Named servers, the new identifiers include digest, nickname,
35593 and indication of Named status. Off by default; see control-spec.txt
35594 for more information.
35595 - Add a "getinfo address" controller command so it can display Tor's
35596 best guess to the user.
35597 - New controller event to alert the controller when our server
35598 descriptor has changed.
35599 - Give more meaningful errors on controller authentication failure.
35601 o Minor features, other:
35602 - When asked to resolve a hostname, don't use non-exit servers unless
35603 requested to do so. This allows servers with broken DNS to be
35604 useful to the network.
35605 - Divide eventdns log messages into warn and info messages.
35606 - Reserve the nickname "Unnamed" for routers that can't pick
35607 a hostname: any router can call itself Unnamed; directory
35608 authorities will never allocate Unnamed to any particular router;
35609 clients won't believe that any router is the canonical Unnamed.
35610 - Only include function names in log messages for info/debug messages.
35611 For notice/warn/err, the content of the message should be clear on
35612 its own, and printing the function name only confuses users.
35613 - Avoid some false positives during reachability testing: don't try
35614 to test via a server that's on the same /24 as us.
35615 - If we fail to build a circuit to an intended enclave, and it's
35616 not mandatory that we use that enclave, stop wanting it.
35617 - When eventdns is enabled, allow multithreaded builds on NetBSD and
35618 OpenBSD. (We had previously disabled threads on these platforms
35619 because they didn't have working thread-safe resolver functions.)
35621 o Major bugfixes, anonymity/security:
35622 - If a client asked for a server by name, and there's a named server
35623 in our network-status but we don't have its descriptor yet, we
35624 could return an unnamed server instead.
35625 - Fix NetBSD bug that could allow someone to force uninitialized RAM
35626 to be sent to a server's DNS resolver. This only affects NetBSD
35627 and other platforms that do not bounds-check tolower().
35628 - Reject (most) attempts to use Tor circuits with length one. (If
35629 many people start using Tor as a one-hop proxy, exit nodes become
35630 a more attractive target for compromise.)
35631 - Just because your DirPort is open doesn't mean people should be
35632 able to remotely teach you about hidden service descriptors. Now
35633 only accept rendezvous posts if you've got HSAuthoritativeDir set.
35635 o Major bugfixes, other:
35636 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
35637 - When a client asks the server to resolve (not connect to)
35638 an address, and it has a cached answer, give them the cached answer.
35639 Previously, the server would give them no answer at all.
35640 - Allow really slow clients to not hang up five minutes into their
35641 directory downloads (suggested by Adam J. Richter).
35642 - We were building exactly the wrong circuits when we anticipated
35643 hidden service requirements, meaning Tor would have to build all
35644 its circuits on demand.
35645 - Avoid crashing when we mmap a router cache file of size 0.
35646 - When testing reachability of our DirPort, don't launch new
35647 tests when there's already one in progress -- unreachable
35648 servers were stacking up dozens of testing streams.
35650 o Minor bugfixes, correctness:
35651 - If we're a directory mirror and we ask for "all" network status
35652 documents, we would discard status documents from authorities
35653 we don't recognize.
35654 - Avoid a memory corruption bug when creating a hash table for
35656 - Avoid controller-triggered crash when misusing certain commands
35657 from a v0 controller on platforms that do not handle
35658 printf("%s",NULL) gracefully.
35659 - Don't crash when a controller sends a third argument to an
35660 "extendcircuit" request.
35661 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35662 response; fix error code when "getinfo dir/status/" fails.
35663 - Avoid crash when telling controller stream-status and a stream
35665 - Patch from Adam Langley to fix assert() in eventdns.c.
35666 - Fix a debug log message in eventdns to say "X resolved to Y"
35667 instead of "X resolved to X".
35668 - Make eventdns give strings for DNS errors, not just error numbers.
35669 - Track unreachable entry guards correctly: don't conflate
35670 'unreachable by us right now' with 'listed as down by the directory
35671 authorities'. With the old code, if a guard was unreachable by
35672 us but listed as running, it would clog our guard list forever.
35673 - Behave correctly in case we ever have a network with more than
35674 2GB/s total advertised capacity.
35675 - Make TrackExitHosts case-insensitive, and fix the behavior of
35676 ".suffix" TrackExitHosts items to avoid matching in the middle of
35678 - Finally fix the openssl warnings from newer gccs that believe that
35679 ignoring a return value is okay, but casting a return value and
35680 then ignoring it is a sign of madness.
35681 - Prevent the contrib/exitlist script from printing the same
35682 result more than once.
35683 - Patch from Steve Hildrey: Generate network status correctly on
35684 non-versioning dirservers.
35685 - Don't listen to the X-Your-Address-Is hint if you did the lookup
35686 via Tor; otherwise you'll think you're the exit node's IP address.
35688 o Minor bugfixes, performance:
35689 - Two small performance improvements on parsing descriptors.
35690 - Major performance improvement on inserting descriptors: change
35691 algorithm from O(n^2) to O(n).
35692 - Make the common memory allocation path faster on machines where
35693 malloc(0) returns a pointer.
35694 - Start remembering X-Your-Address-Is directory hints even if you're
35695 a client, so you can become a server more smoothly.
35696 - Avoid duplicate entries on MyFamily line in server descriptor.
35698 o Packaging, features:
35699 - Remove architecture from OS X builds. The official builds are
35700 now universal binaries.
35701 - The Debian package now uses --verify-config when (re)starting,
35702 to distinguish configuration errors from other errors.
35703 - Update RPMs to require libevent 1.1b.
35705 o Packaging, bugfixes:
35706 - Patches so Tor builds with MinGW on Windows.
35707 - Patches so Tor might run on Cygwin again.
35708 - Resume building on non-gcc compilers and ancient gcc. Resume
35709 building with the -O0 compile flag. Resume building cleanly on
35711 - Run correctly on OS X platforms with case-sensitive filesystems.
35712 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
35713 - Add autoconf checks so Tor can build on Solaris x86 again.
35716 - Documented (and renamed) ServerDNSSearchDomains and
35717 ServerDNSResolvConfFile options.
35718 - Be clearer that the *ListenAddress directives can be repeated
35722 Changes in version 0.1.1.24 - 2006-09-29
35724 - Allow really slow clients to not hang up five minutes into their
35725 directory downloads (suggested by Adam J. Richter).
35726 - Fix major performance regression from 0.1.0.x: instead of checking
35727 whether we have enough directory information every time we want to
35728 do something, only check when the directory information has changed.
35729 This should improve client CPU usage by 25-50%.
35730 - Don't crash if, after a server has been running for a while,
35731 it can't resolve its hostname.
35734 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35735 - Don't crash when the controller receives a third argument to an
35736 "extendcircuit" request.
35737 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35738 response; fix error code when "getinfo dir/status/" fails.
35739 - Fix configure.in to not produce broken configure files with
35740 more recent versions of autoconf. Thanks to Clint for his auto*
35742 - Fix security bug on NetBSD that could allow someone to force
35743 uninitialized RAM to be sent to a server's DNS resolver. This
35744 only affects NetBSD and other platforms that do not bounds-check
35746 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
35747 methods: these are known to be buggy.
35748 - If we're a directory mirror and we ask for "all" network status
35749 documents, we would discard status documents from authorities
35750 we don't recognize.
35753 Changes in version 0.1.2.1-alpha - 2006-08-27
35755 - Add "eventdns" async dns library from Adam Langley, tweaked to
35756 build on OSX and Windows. Only enabled if you pass the
35757 --enable-eventdns argument to configure.
35758 - Allow servers with no hostname or IP address to learn their
35759 IP address by asking the directory authorities. This code only
35760 kicks in when you would normally have exited with a "no address"
35761 error. Nothing's authenticated, so use with care.
35762 - Rather than waiting a fixed amount of time between retrying
35763 application connections, we wait only 5 seconds for the first,
35764 10 seconds for the second, and 15 seconds for each retry after
35765 that. Hopefully this will improve the expected user experience.
35766 - Patch from Tup to add support for transparent AP connections:
35767 this basically bundles the functionality of trans-proxy-tor
35768 into the Tor mainline. Now hosts with compliant pf/netfilter
35769 implementations can redirect TCP connections straight to Tor
35770 without diverting through SOCKS. Needs docs.
35771 - Busy directory servers save lots of memory by spooling server
35772 descriptors, v1 directories, and v2 networkstatus docs to buffers
35773 as needed rather than en masse. Also mmap the cached-routers
35774 files, so we don't need to keep the whole thing in memory too.
35775 - Automatically avoid picking more than one node from the same
35776 /16 network when constructing a circuit.
35777 - Revise and clean up the torrc.sample that we ship with; add
35778 a section for BandwidthRate and BandwidthBurst.
35781 - Split circuit_t into origin_circuit_t and or_circuit_t, and
35782 split connection_t into edge, or, dir, control, and base structs.
35783 These will save quite a bit of memory on busy servers, and they'll
35784 also help us track down bugs in the code and bugs in the spec.
35785 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
35786 or later. Log when we are doing this, so we can diagnose it when
35787 it fails. (Also, recommend libevent 1.1b for kqueue and
35788 win32 methods; deprecate libevent 1.0b harder; make libevent
35789 recommendation system saner.)
35790 - Start being able to build universal binaries on OS X (thanks
35792 - Export the default exit policy via the control port, so controllers
35793 don't need to guess what it is / will be later.
35794 - Add a man page entry for ProtocolWarnings.
35795 - Add TestVia config option to the man page.
35796 - Remove even more protocol-related warnings from Tor server logs,
35797 such as bad TLS handshakes and malformed begin cells.
35798 - Stop fetching descriptors if you're not a dir mirror and you
35799 haven't tried to establish any circuits lately. [This currently
35800 causes some dangerous behavior, because when you start up again
35801 you'll use your ancient server descriptors.]
35802 - New DirPort behavior: if you have your dirport set, you download
35803 descriptors aggressively like a directory mirror, whether or not
35804 your ORPort is set.
35805 - Get rid of the router_retry_connections notion. Now routers
35806 no longer try to rebuild long-term connections to directory
35807 authorities, and directory authorities no longer try to rebuild
35808 long-term connections to all servers. We still don't hang up
35809 connections in these two cases though -- we need to look at it
35810 more carefully to avoid flapping, and we likely need to wait til
35811 0.1.1.x is obsolete.
35812 - Drop compatibility with obsolete Tors that permit create cells
35813 to have the wrong circ_id_type.
35814 - Re-enable per-connection rate limiting. Get rid of the "OP
35815 bandwidth" concept. Lay groundwork for "bandwidth classes" --
35816 separate global buckets that apply depending on what sort of conn
35818 - Start publishing one minute or so after we find our ORPort
35819 to be reachable. This will help reduce the number of descriptors
35820 we have for ourselves floating around, since it's quite likely
35821 other things (e.g. DirPort) will change during that minute too.
35822 - Fork the v1 directory protocol into its own spec document,
35823 and mark dir-spec.txt as the currently correct (v2) spec.
35826 - When we find our DirPort to be reachable, publish a new descriptor
35827 so we'll tell the world (reported by pnx).
35828 - Publish a new descriptor after we hup/reload. This is important
35829 if our config has changed such that we'll want to start advertising
35830 our DirPort now, etc.
35831 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35832 - When we have a state file we cannot parse, tell the user and
35833 move it aside. Now we avoid situations where the user starts
35834 Tor in 1904, Tor writes a state file with that timestamp in it,
35835 the user fixes her clock, and Tor refuses to start.
35836 - Fix configure.in to not produce broken configure files with
35837 more recent versions of autoconf. Thanks to Clint for his auto*
35839 - "tor --verify-config" now exits with -1(255) or 0 depending on
35840 whether the config options are bad or good.
35841 - Resolve bug 321 when using dnsworkers: append a period to every
35842 address we resolve at the exit node, so that we do not accidentally
35843 pick up local addresses, and so that failing searches are retried
35844 in the resolver search domains. (This is already solved for
35845 eventdns.) (This breaks Blossom servers for now.)
35846 - If we are using an exit enclave and we can't connect, e.g. because
35847 its webserver is misconfigured to not listen on localhost, then
35848 back off and try connecting from somewhere else before we fail.
35851 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
35852 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
35853 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
35854 when the IP address is mapped through MapAddress to a hostname.
35855 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
35856 useless IPv6 DNS resolves.
35857 - Patch suggested by Karsten Loesing: respond to SIGNAL command
35858 before we execute the signal, in case the signal shuts us down.
35859 - Clean up AllowInvalidNodes man page entry.
35860 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
35861 - Add more asserts to track down an assert error on a windows Tor
35862 server with connection_add being called with socket == -1.
35863 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
35864 - Fix misleading log messages: an entry guard that is "unlisted",
35865 as well as not known to be "down" (because we've never heard
35866 of it), is not therefore "up".
35867 - Remove code to special-case "-cvs" ending, since it has not
35868 actually mattered since 0.0.9.
35869 - Make our socks5 handling more robust to broken socks clients:
35870 throw out everything waiting on the buffer in between socks
35871 handshake phases, since they can't possibly (so the theory
35872 goes) have predicted what we plan to respond to them.
35875 Changes in version 0.1.1.23 - 2006-07-30
35877 - Fast Tor servers, especially exit nodes, were triggering asserts
35878 due to a bug in handling the list of pending DNS resolves. Some
35879 bugs still remain here; we're hunting them.
35880 - Entry guards could crash clients by sending unexpected input.
35881 - More fixes on reachability testing: if you find yourself reachable,
35882 then don't ever make any client requests (so you stop predicting
35883 circuits), then hup or have your clock jump, then later your IP
35884 changes, you won't think circuits are working, so you won't try to
35885 test reachability, so you won't publish.
35888 - Avoid a crash if the controller does a resetconf firewallports
35889 and then a setconf fascistfirewall=1.
35890 - Avoid an integer underflow when the dir authority decides whether
35891 a router is stable: we might wrongly label it stable, and compute
35892 a slightly wrong median stability, when a descriptor is published
35894 - Fix a place where we might trigger an assert if we can't build our
35895 own server descriptor yet.
35898 Changes in version 0.1.1.22 - 2006-07-05
35900 - Fix a big bug that was causing servers to not find themselves
35901 reachable if they changed IP addresses. Since only 0.1.1.22+
35902 servers can do reachability testing correctly, now we automatically
35903 make sure to test via one of these.
35904 - Fix to allow clients and mirrors to learn directory info from
35905 descriptor downloads that get cut off partway through.
35906 - Directory authorities had a bug in deciding if a newly published
35907 descriptor was novel enough to make everybody want a copy -- a few
35908 servers seem to be publishing new descriptors many times a minute.
35910 - Fix a rare bug that was causing some servers to complain about
35911 "closing wedged cpuworkers" and skip some circuit create requests.
35912 - Make the Exit flag in directory status documents actually work.
35915 Changes in version 0.1.1.21 - 2006-06-10
35916 o Crash and assert fixes from 0.1.1.20:
35917 - Fix a rare crash on Tor servers that have enabled hibernation.
35918 - Fix a seg fault on startup for Tor networks that use only one
35919 directory authority.
35920 - Fix an assert from a race condition that occurs on Tor servers
35921 while exiting, where various threads are trying to log that they're
35922 exiting, and delete the logs, at the same time.
35923 - Make our unit tests pass again on certain obscure platforms.
35926 - Add support for building SUSE RPM packages.
35927 - Speed up initial bootstrapping for clients: if we are making our
35928 first ever connection to any entry guard, then don't mark it down
35930 - When only one Tor server in the network is labelled as a guard,
35931 and we've already picked him, we would cycle endlessly picking him
35932 again, being unhappy about it, etc. Now we specifically exclude
35933 current guards when picking a new guard.
35934 - Servers send create cells more reliably after the TLS connection
35935 is established: we were sometimes forgetting to send half of them
35936 when we had more than one pending.
35937 - If we get a create cell that asks us to extend somewhere, but the
35938 Tor server there doesn't match the expected digest, we now send
35939 a destroy cell back, rather than silently doing nothing.
35940 - Make options->RedirectExit work again.
35941 - Make cookie authentication for the controller work again.
35942 - Stop being picky about unusual characters in the arguments to
35943 mapaddress. It's none of our business.
35944 - Add a new config option "TestVia" that lets you specify preferred
35945 middle hops to use for test circuits. Perhaps this will let me
35946 debug the reachability problems better.
35948 o Log / documentation fixes:
35949 - If we're a server and some peer has a broken TLS certificate, don't
35950 log about it unless ProtocolWarnings is set, i.e., we want to hear
35951 about protocol violations by others.
35952 - Fix spelling of VirtualAddrNetwork in man page.
35953 - Add a better explanation at the top of the autogenerated torrc file
35954 about what happened to our old torrc.
35957 Changes in version 0.1.1.20 - 2006-05-23
35959 - Downgrade a log severity where servers complain that they're
35961 - Avoid a compile warning on FreeBSD.
35962 - Remove string size limit on NEWDESC messages; solve bug 291.
35963 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
35964 more thoroughly when we're running on windows.
35967 Changes in version 0.1.1.19-rc - 2006-05-03
35969 - Regenerate our local descriptor if it's dirty and we try to use
35970 it locally (e.g. if it changes during reachability detection).
35971 - If we setconf our ORPort to 0, we continued to listen on the
35972 old ORPort and receive connections.
35973 - Avoid a second warning about machine/limits.h on Debian
35975 - Be willing to add our own routerinfo into the routerlist.
35976 Now authorities will include themselves in their directories
35977 and network-statuses.
35978 - Stop trying to upload rendezvous descriptors to every
35979 directory authority: only try the v1 authorities.
35980 - Servers no longer complain when they think they're not
35981 registered with the directory authorities. There were too many
35983 - Backport dist-rpm changes so rpms can be built without errors.
35986 - Implement an option, VirtualAddrMask, to set which addresses
35987 get handed out in response to mapaddress requests. This works
35988 around a bug in tsocks where 127.0.0.0/8 is never socksified.
35991 Changes in version 0.1.1.18-rc - 2006-04-10
35993 - Work harder to download live network-statuses from all the
35994 directory authorities we know about. Improve the threshold
35995 decision logic so we're more robust to edge cases.
35996 - When fetching rendezvous descriptors, we were willing to ask
35997 v2 authorities too, which would always return 404.
36000 - Stop listing down or invalid nodes in the v1 directory. This will
36001 reduce its bulk by about 1/3, and reduce load on directory
36003 - When deciding whether a router is Fast or Guard-worthy, consider
36004 his advertised BandwidthRate and not just the BandwidthCapacity.
36005 - No longer ship INSTALL and README files -- they are useless now.
36006 - Force rpmbuild to behave and honor target_cpu.
36007 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
36008 - Start to include translated versions of the tor-doc-*.html
36009 files, along with the screenshots. Still needs more work.
36010 - Start sending back 512 and 451 errors if mapaddress fails,
36011 rather than not sending anything back at all.
36012 - When we fail to bind or listen on an incoming or outgoing
36013 socket, we should close it before failing. otherwise we just
36014 leak it. (thanks to weasel for finding.)
36015 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
36016 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
36017 - Make NoPublish (even though deprecated) work again.
36018 - Fix a minor security flaw where a versioning auth dirserver
36019 could list a recommended version many times in a row to make
36020 clients more convinced that it's recommended.
36021 - Fix crash bug if there are two unregistered servers running
36022 with the same nickname, one of them is down, and you ask for
36023 them by nickname in your EntryNodes or ExitNodes. Also, try
36024 to pick the one that's running rather than an arbitrary one.
36025 - Fix an infinite loop we could hit if we go offline for too long.
36026 - Complain when we hit WSAENOBUFS on recv() or write() too.
36027 Perhaps this will help us hunt the bug.
36028 - If you're not a versioning dirserver, don't put the string
36029 "client-versions \nserver-versions \n" in your network-status.
36030 - Lower the minimum required number of file descriptors to 1000,
36031 so we can have some overhead for Valgrind on Linux, where the
36032 default ulimit -n is 1024.
36035 - Add tor.dizum.com as the fifth authoritative directory server.
36036 - Add a new config option FetchUselessDescriptors, off by default,
36037 for when you plan to run "exitlist" on your client and you want
36038 to know about even the non-running descriptors.
36041 Changes in version 0.1.1.17-rc - 2006-03-28
36043 - Clients and servers since 0.1.1.10-alpha have been expiring
36044 connections whenever they are idle for 5 minutes and they *do*
36045 have circuits on them. Oops. With this new version, clients will
36046 discard their previous entry guard choices and avoid choosing
36047 entry guards running these flawed versions.
36048 - Fix memory leak when uncompressing concatenated zlib streams. This
36049 was causing substantial leaks over time on Tor servers.
36050 - The v1 directory was including servers as much as 48 hours old,
36051 because that's how the new routerlist->routers works. Now only
36052 include them if they're 20 hours old or less.
36055 - Resume building on irix64, netbsd 2.0, etc.
36056 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
36058 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
36059 and it is confusing some users.
36060 - Mirrors stop caching the v1 directory so often.
36061 - Make the max number of old descriptors that a cache will hold
36062 rise with the number of directory authorities, so we can scale.
36063 - Change our win32 uname() hack to be more forgiving about what
36064 win32 versions it thinks it's found.
36067 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
36069 - When the controller's *setconf commands fail, collect an error
36070 message in a string and hand it back to the controller.
36071 - Make the v2 dir's "Fast" flag based on relative capacity, just
36072 like "Stable" is based on median uptime. Name everything in the
36073 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
36074 - Log server fingerprint on startup, so new server operators don't
36075 have to go hunting around their filesystem for it.
36076 - Return a robots.txt on our dirport to discourage google indexing.
36077 - Let the controller ask for GETINFO dir/status/foo so it can ask
36078 directly rather than connecting to the dir port. Only works when
36079 dirport is set for now.
36081 o New config options rather than constants in the code:
36082 - SocksTimeout: How long do we let a socks connection wait
36083 unattached before we fail it?
36084 - CircuitBuildTimeout: Cull non-open circuits that were born
36085 at least this many seconds ago.
36086 - CircuitIdleTimeout: Cull open clean circuits that were born
36087 at least this many seconds ago.
36090 Changes in version 0.1.1.16-rc - 2006-03-18
36091 o Bugfixes on 0.1.1.15-rc:
36092 - Fix assert when the controller asks to attachstream a connect-wait
36093 or resolve-wait stream.
36094 - Now do address rewriting when the controller asks us to attach
36095 to a particular circuit too. This will let Blossom specify
36096 "moria2.exit" without having to learn what moria2's IP address is.
36097 - Make the "tor --verify-config" command-line work again, so people
36098 can automatically check if their torrc will parse.
36099 - Authoritative dirservers no longer require an open connection from
36100 a server to consider him "reachable". We need this change because
36101 when we add new auth dirservers, old servers won't know not to
36103 - Let Tor build on Sun CC again.
36104 - Fix an off-by-one buffer size in dirserv.c that magically never
36105 hit our three authorities but broke sjmurdoch's own tor network.
36106 - If we as a directory mirror don't know of any v1 directory
36107 authorities, then don't try to cache any v1 directories.
36108 - Stop warning about unknown servers in our family when they are
36109 given as hex digests.
36110 - Stop complaining as quickly to the server operator that he
36111 hasn't registered his nickname/key binding.
36112 - Various cleanups so we can add new V2 Auth Dirservers.
36113 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
36114 reflect the updated flags in our v2 dir protocol.
36115 - Resume allowing non-printable characters for exit streams (both
36116 for connecting and for resolving). Now we tolerate applications
36117 that don't follow the RFCs. But continue to block malformed names
36120 o Bugfixes on 0.1.0.x:
36121 - Fix assert bug in close_logs(): when we close and delete logs,
36122 remove them all from the global "logfiles" list.
36123 - Fix minor integer overflow in calculating when we expect to use up
36124 our bandwidth allocation before hibernating.
36125 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
36126 there are multiple SSLs installed with different versions.
36127 - When we try to be a server and Address is not explicitly set and
36128 our hostname resolves to a private IP address, try to use an
36129 interface address if it has a public address. Now Windows machines
36130 that think of themselves as localhost can work by default.
36133 - Let the controller ask for GETINFO dir/server/foo so it can ask
36134 directly rather than connecting to the dir port.
36135 - Let the controller tell us about certain router descriptors
36136 that it doesn't want Tor to use in circuits. Implement
36137 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
36138 - New config option SafeSocks to reject all application connections
36139 using unsafe socks protocols. Defaults to off.
36142 Changes in version 0.1.1.15-rc - 2006-03-11
36143 o Bugfixes and cleanups:
36144 - When we're printing strings from the network, don't try to print
36145 non-printable characters. This protects us against shell escape
36146 sequence exploits, and also against attacks to fool humans into
36147 misreading their logs.
36148 - Fix a bug where Tor would fail to establish any connections if you
36149 left it off for 24 hours and then started it: we were happy with
36150 the obsolete network statuses, but they all referred to router
36151 descriptors that were too old to fetch, so we ended up with no
36152 valid router descriptors.
36153 - Fix a seg fault in the controller's "getinfo orconn-status"
36154 command while listing status on incoming handshaking connections.
36155 Introduce a status name "NEW" for these connections.
36156 - If we get a linelist or linelist_s config option from the torrc
36157 (e.g. ExitPolicy) and it has no value, warn and skip rather than
36158 silently resetting it to its default.
36159 - Don't abandon entry guards until they've been down or gone for
36161 - Cleaner and quieter log messages.
36164 - New controller signal NEWNYM that makes new application requests
36165 use clean circuits.
36166 - Add a new circuit purpose 'controller' to let the controller ask
36167 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
36168 controller command to let you specify the purpose if you're
36169 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
36170 command to let you change a circuit's purpose after it's been
36172 - Accept "private:*" in routerdesc exit policies; not generated yet
36173 because older Tors do not understand it.
36174 - Add BSD-style contributed startup script "rc.subr" from Peter
36178 Changes in version 0.1.1.14-alpha - 2006-02-20
36179 o Bugfixes on 0.1.1.x:
36180 - Don't die if we ask for a stdout or stderr log (even implicitly)
36181 and we're set to RunAsDaemon -- just warn.
36182 - We still had a few bugs in the OR connection rotation code that
36183 caused directory servers to slowly aggregate connections to other
36184 fast Tor servers. This time for sure!
36185 - Make log entries on Win32 include the name of the function again.
36186 - We were treating a pair of exit policies if they were equal even
36187 if one said accept and the other said reject -- causing us to
36188 not always publish a new descriptor since we thought nothing
36190 - Retry pending server downloads as well as pending networkstatus
36191 downloads when we unexpectedly get a socks request.
36192 - We were ignoring the IS_FAST flag in the directory status,
36193 meaning we were willing to pick trivial-bandwidth nodes for "fast"
36195 - If the controller's SAVECONF command fails (e.g. due to file
36196 permissions), let the controller know that it failed.
36199 - If we're trying to be a Tor server and running Windows 95/98/ME
36200 as a server, explain that we'll likely crash.
36201 - When we're a server, a client asks for an old-style directory,
36202 and our write bucket is empty, don't give it to him. This way
36203 small servers can continue to serve the directory *sometimes*,
36204 without getting overloaded.
36205 - Compress exit policies even more -- look for duplicate lines
36207 - Clients now honor the "guard" flag in the router status when
36208 picking entry guards, rather than looking at is_fast or is_stable.
36209 - Retain unrecognized lines in $DATADIR/state file, so that we can
36210 be forward-compatible.
36211 - Generate 18.0.0.0/8 address policy format in descs when we can;
36212 warn when the mask is not reducible to a bit-prefix.
36213 - Let the user set ControlListenAddress in the torrc. This can be
36214 dangerous, but there are some cases (like a secured LAN) where it
36216 - Split ReachableAddresses into ReachableDirAddresses and
36217 ReachableORAddresses, so we can restrict Dir conns to port 80
36218 and OR conns to port 443.
36219 - Now we can target arch and OS in rpm builds (contributed by
36220 Phobos). Also make the resulting dist-rpm filename match the
36222 - New config options to help controllers: FetchServerDescriptors
36223 and FetchHidServDescriptors for whether to fetch server
36224 info and hidserv info or let the controller do it, and
36225 PublishServerDescriptor and PublishHidServDescriptors.
36226 - Also let the controller set the __AllDirActionsPrivate config
36227 option if you want all directory fetches/publishes to happen via
36228 Tor (it assumes your controller bootstraps your circuits).
36231 Changes in version 0.1.0.17 - 2006-02-17
36232 o Crash bugfixes on 0.1.0.x:
36233 - When servers with a non-zero DirPort came out of hibernation,
36234 sometimes they would trigger an assert.
36236 o Other important bugfixes:
36237 - On platforms that don't have getrlimit (like Windows), we were
36238 artificially constraining ourselves to a max of 1024
36239 connections. Now just assume that we can handle as many as 15000
36240 connections. Hopefully this won't cause other problems.
36242 o Backported features:
36243 - When we're a server, a client asks for an old-style directory,
36244 and our write bucket is empty, don't give it to him. This way
36245 small servers can continue to serve the directory *sometimes*,
36246 without getting overloaded.
36247 - Whenever you get a 503 in response to a directory fetch, try
36248 once more. This will become important once servers start sending
36249 503's whenever they feel busy.
36250 - Fetch a new directory every 120 minutes, not every 40 minutes.
36251 Now that we have hundreds of thousands of users running the old
36252 directory algorithm, it's starting to hurt a lot.
36253 - Bump up the period for forcing a hidden service descriptor upload
36254 from 20 minutes to 1 hour.
36257 Changes in version 0.1.1.13-alpha - 2006-02-09
36258 o Crashes in 0.1.1.x:
36259 - When you tried to setconf ORPort via the controller, Tor would
36260 crash. So people using TorCP to become a server were sad.
36261 - Solve (I hope) the stack-smashing bug that we were seeing on fast
36262 servers. The problem appears to be something do with OpenSSL's
36263 random number generation, or how we call it, or something. Let me
36264 know if the crashes continue.
36265 - Turn crypto hardware acceleration off by default, until we find
36266 somebody smart who can test it for us. (It appears to produce
36267 seg faults in at least some cases.)
36268 - Fix a rare assert error when we've tried all intro points for
36269 a hidden service and we try fetching the service descriptor again:
36270 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
36273 - Fix a major load balance bug: we were round-robining in 16 KB
36274 chunks, and servers with bandwidthrate of 20 KB, while downloading
36275 a 600 KB directory, would starve their other connections. Now we
36276 try to be a bit more fair.
36277 - Dir authorities and mirrors were never expiring the newest
36278 descriptor for each server, causing memory and directory bloat.
36279 - Fix memory-bloating and connection-bloating bug on servers: We
36280 were never closing any connection that had ever had a circuit on
36281 it, because we were checking conn->n_circuits == 0, yet we had a
36282 bug that let it go negative.
36283 - Make Tor work using squid as your http proxy again -- squid
36284 returns an error if you ask for a URL that's too long, and it uses
36285 a really generic error message. Plus, many people are behind a
36286 transparent squid so they don't even realize it.
36287 - On platforms that don't have getrlimit (like Windows), we were
36288 artificially constraining ourselves to a max of 1024
36289 connections. Now just assume that we can handle as many as 15000
36290 connections. Hopefully this won't cause other problems.
36291 - Add a new config option ExitPolicyRejectPrivate which defaults to
36292 1. This means all exit policies will begin with rejecting private
36293 addresses, unless the server operator explicitly turns it off.
36296 - Clients no longer download descriptors for non-running
36298 - Before we add new directory authorities, we should make it
36299 clear that only v1 authorities should receive/publish hidden
36300 service descriptors.
36303 - As soon as we've fetched some more directory info, immediately
36304 try to download more server descriptors. This way we don't have
36305 a 10 second pause during initial bootstrapping.
36306 - Remove even more loud log messages that the server operator can't
36308 - When we're running an obsolete or un-recommended version, make
36309 the log message more clear about what the problem is and what
36310 versions *are* still recommended.
36311 - Provide a more useful warn message when our onion queue gets full:
36312 the CPU is too slow or the exit policy is too liberal.
36313 - Don't warn when we receive a 503 from a dirserver/cache -- this
36314 will pave the way for them being able to refuse if they're busy.
36315 - When we fail to bind a listener, try to provide a more useful
36316 log message: e.g., "Is Tor already running?"
36317 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
36318 Goldberg can prove things about our handshake protocol more
36320 - MaxConn has been obsolete for a while now. Document the ConnLimit
36321 config option, which is a *minimum* number of file descriptors
36322 that must be available else Tor refuses to start.
36323 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
36324 if you log to syslog and want something other than LOG_DAEMON.
36325 - Make dirservers generate a separate "guard" flag to mean,
36326 "would make a good entry guard". Make clients parse it and vote
36327 on it. Not used by clients yet.
36328 - Implement --with-libevent-dir option to ./configure. Also, improve
36329 search techniques to find libevent, and use those for openssl too.
36330 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36331 - Only start testing reachability once we've established a
36332 circuit. This will make startup on dirservers less noisy.
36333 - Don't try to upload hidden service descriptors until we have
36334 established a circuit.
36335 - Fix the controller's "attachstream 0" command to treat conn like
36336 it just connected, doing address remapping, handling .exit and
36337 .onion idioms, and so on. Now we're more uniform in making sure
36338 that the controller hears about new and closing connections.
36341 Changes in version 0.1.1.12-alpha - 2006-01-11
36342 o Bugfixes on 0.1.1.x:
36343 - The fix to close duplicate server connections was closing all
36344 Tor client connections if they didn't establish a circuit
36345 quickly enough. Oops.
36346 - Fix minor memory issue (double-free) that happened on exit.
36348 o Bugfixes on 0.1.0.x:
36349 - Tor didn't warn when it failed to open a log file.
36352 Changes in version 0.1.1.11-alpha - 2006-01-10
36353 o Crashes in 0.1.1.x:
36354 - Include all the assert/crash fixes from 0.1.0.16.
36355 - If you start Tor and then quit very quickly, there were some
36356 races that tried to free things that weren't allocated yet.
36357 - Fix a rare memory stomp if you're running hidden services.
36358 - Fix segfault when specifying DirServer in config without nickname.
36359 - Fix a seg fault when you finish connecting to a server but at
36360 that moment you dump his server descriptor.
36361 - Extendcircuit and Attachstream controller commands would
36362 assert/crash if you don't give them enough arguments.
36363 - Fix an assert error when we're out of space in the connection_list
36364 and we try to post a hidden service descriptor (reported by weasel).
36365 - If you specify a relative torrc path and you set RunAsDaemon in
36366 your torrc, then it chdir()'s to the new directory. If you HUP,
36367 it tries to load the new torrc location, fails, and exits.
36368 The fix: no longer allow a relative path to torrc using -f.
36371 - Implement "entry guards": automatically choose a handful of entry
36372 nodes and stick with them for all circuits. Only pick new guards
36373 when the ones you have are unsuitable, and if the old guards
36374 become suitable again, switch back. This will increase security
36375 dramatically against certain end-point attacks. The EntryNodes
36376 config option now provides some hints about which entry guards you
36377 want to use most; and StrictEntryNodes means to only use those.
36378 - New directory logic: download by descriptor digest, not by
36379 fingerprint. Caches try to download all listed digests from
36380 authorities; clients try to download "best" digests from caches.
36381 This avoids partitioning and isolating attacks better.
36382 - Make the "stable" router flag in network-status be the median of
36383 the uptimes of running valid servers, and make clients pay
36384 attention to the network-status flags. Thus the cutoff adapts
36385 to the stability of the network as a whole, making IRC, IM, etc
36386 connections more reliable.
36389 - Tor servers with dynamic IP addresses were needing to wait 18
36390 hours before they could start doing reachability testing using
36391 the new IP address and ports. This is because they were using
36392 the internal descriptor to learn what to test, yet they were only
36393 rebuilding the descriptor once they decided they were reachable.
36394 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
36395 to download certain server descriptors, throw them away, and then
36396 fetch them again after 30 minutes. Now mirrors throw away these
36397 server descriptors so clients can't get them.
36398 - We were leaving duplicate connections to other ORs open for a week,
36399 rather than closing them once we detect a duplicate. This only
36400 really affected authdirservers, but it affected them a lot.
36401 - Spread the authdirservers' reachability testing over the entire
36402 testing interval, so we don't try to do 500 TLS's at once every
36406 - If the network is down, and we try to connect to a conn because
36407 we have a circuit in mind, and we timeout (30 seconds) because the
36408 network never answers, we were expiring the circuit, but we weren't
36409 obsoleting the connection or telling the entry_guards functions.
36410 - Some Tor servers process billions of cells per day. These statistics
36411 need to be uint64_t's.
36412 - Check for integer overflows in more places, when adding elements
36413 to smartlists. This could possibly prevent a buffer overflow
36414 on malicious huge inputs. I don't see any, but I haven't looked
36416 - ReachableAddresses kept growing new "reject *:*" lines on every
36418 - When you "setconf log" via the controller, it should remove all
36419 logs. We were automatically adding back in a "log notice stdout".
36420 - Newly bootstrapped Tor networks couldn't establish hidden service
36421 circuits until they had nodes with high uptime. Be more tolerant.
36422 - We were marking servers down when they could not answer every piece
36423 of the directory request we sent them. This was far too harsh.
36424 - Fix the torify (tsocks) config file to not use Tor for localhost
36426 - Directory authorities now go to the proper authority when asking for
36427 a networkstatus, even when they want a compressed one.
36428 - Fix a harmless bug that was causing Tor servers to log
36429 "Got an end because of misc error, but we're not an AP. Closing."
36430 - Authorities were treating their own descriptor changes as cosmetic,
36431 meaning the descriptor available in the network-status and the
36432 descriptor that clients downloaded were different.
36433 - The OS X installer was adding a symlink for tor_resolve but
36434 the binary was called tor-resolve (reported by Thomas Hardly).
36435 - Workaround a problem with some http proxies where they refuse GET
36436 requests that specify "Content-Length: 0" (reported by Adrian).
36437 - Fix wrong log message when you add a "HiddenServiceNodes" config
36438 line without any HiddenServiceDir line (reported by Chris Thomas).
36441 - Write the TorVersion into the state file so we have a prayer of
36442 keeping forward and backward compatibility.
36443 - Revive the FascistFirewall config option rather than eliminating it:
36444 now it's a synonym for ReachableAddresses *:80,*:443.
36445 - Clients choose directory servers from the network status lists,
36446 not from their internal list of router descriptors. Now they can
36447 go to caches directly rather than needing to go to authorities
36449 - Directory authorities ignore router descriptors that have only
36450 cosmetic differences: do this for 0.1.0.x servers now too.
36451 - Add a new flag to network-status indicating whether the server
36452 can answer v2 directory requests too.
36453 - Authdirs now stop whining so loudly about bad descriptors that
36454 they fetch from other dirservers. So when there's a log complaint,
36455 it's for sure from a freshly uploaded descriptor.
36456 - Reduce memory requirements in our structs by changing the order
36458 - There used to be two ways to specify your listening ports in a
36459 server descriptor: on the "router" line and with a separate "ports"
36460 line. Remove support for the "ports" line.
36461 - New config option "AuthDirRejectUnlisted" for auth dirservers as
36462 a panic button: if we get flooded with unusable servers we can
36463 revert to only listing servers in the approved-routers file.
36464 - Auth dir servers can now mark a fingerprint as "!reject" or
36465 "!invalid" in the approved-routers file (as its nickname), to
36466 refuse descriptors outright or include them but marked as invalid.
36467 - Servers store bandwidth history across restarts/crashes.
36468 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
36469 get a better idea of why their circuits failed. Not used yet.
36470 - Directory mirrors now cache up to 16 unrecognized network-status
36471 docs. Now we can add new authdirservers and they'll be cached too.
36472 - When picking a random directory, prefer non-authorities if any
36474 - New controller option "getinfo desc/all-recent" to fetch the
36475 latest server descriptor for every router that Tor knows about.
36478 Changes in version 0.1.0.16 - 2006-01-02
36479 o Crash bugfixes on 0.1.0.x:
36480 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36481 corrupting the heap, losing FDs, or crashing when we need to resize
36482 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36483 - It turns out sparc64 platforms crash on unaligned memory access
36484 too -- so detect and avoid this.
36485 - Handle truncated compressed data correctly (by detecting it and
36487 - Fix possible-but-unlikely free(NULL) in control.c.
36488 - When we were closing connections, there was a rare case that
36489 stomped on memory, triggering seg faults and asserts.
36490 - Avoid potential infinite recursion when building a descriptor. (We
36491 don't know that it ever happened, but better to fix it anyway.)
36492 - We were neglecting to unlink marked circuits from soon-to-close OR
36493 connections, which caused some rare scribbling on freed memory.
36494 - Fix a memory stomping race bug when closing the joining point of two
36495 rendezvous circuits.
36496 - Fix an assert in time parsing found by Steven Murdoch.
36498 o Other bugfixes on 0.1.0.x:
36499 - When we're doing reachability testing, provide more useful log
36500 messages so the operator knows what to expect.
36501 - Do not check whether DirPort is reachable when we are suppressing
36502 advertising it because of hibernation.
36503 - When building with -static or on Solaris, we sometimes needed -ldl.
36504 - When we're deciding whether a stream has enough circuits around
36505 that can handle it, count the freshly dirty ones and not the ones
36506 that are so dirty they won't be able to handle it.
36507 - When we're expiring old circuits, we had a logic error that caused
36508 us to close new rendezvous circuits rather than old ones.
36509 - Give a more helpful log message when you try to change ORPort via
36510 the controller: you should upgrade Tor if you want that to work.
36511 - We were failing to parse Tor versions that start with "Tor ".
36512 - Tolerate faulty streams better: when a stream fails for reason
36513 exitpolicy, stop assuming that the router is lying about his exit
36514 policy. When a stream fails for reason misc, allow it to retry just
36515 as if it was resolvefailed. When a stream has failed three times,
36516 reset its failure count so we can try again and get all three tries.
36519 Changes in version 0.1.1.10-alpha - 2005-12-11
36520 o Correctness bugfixes on 0.1.0.x:
36521 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36522 corrupting the heap, losing FDs, or crashing when we need to resize
36523 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36524 - Stop doing the complex voodoo overkill checking for insecure
36525 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
36526 - When we were closing connections, there was a rare case that
36527 stomped on memory, triggering seg faults and asserts.
36528 - We were neglecting to unlink marked circuits from soon-to-close OR
36529 connections, which caused some rare scribbling on freed memory.
36530 - When we're deciding whether a stream has enough circuits around
36531 that can handle it, count the freshly dirty ones and not the ones
36532 that are so dirty they won't be able to handle it.
36533 - Recover better from TCP connections to Tor servers that are
36534 broken but don't tell you (it happens!); and rotate TLS
36535 connections once a week.
36536 - When we're expiring old circuits, we had a logic error that caused
36537 us to close new rendezvous circuits rather than old ones.
36538 - Fix a scary-looking but apparently harmless bug where circuits
36539 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
36540 servers, and never switch to state CIRCUIT_STATE_OPEN.
36541 - When building with -static or on Solaris, we sometimes needed to
36543 - Give a useful message when people run Tor as the wrong user,
36544 rather than telling them to start chowning random directories.
36545 - We were failing to inform the controller about new .onion streams.
36547 o Security bugfixes on 0.1.0.x:
36548 - Refuse server descriptors if the fingerprint line doesn't match
36549 the included identity key. Tor doesn't care, but other apps (and
36550 humans) might actually be trusting the fingerprint line.
36551 - We used to kill the circuit when we receive a relay command we
36552 don't recognize. Now we just drop it.
36553 - Start obeying our firewall options more rigorously:
36554 . If we can't get to a dirserver directly, try going via Tor.
36555 . Don't ever try to connect (as a client) to a place our
36556 firewall options forbid.
36557 . If we specify a proxy and also firewall options, obey the
36558 firewall options even when we're using the proxy: some proxies
36559 can only proxy to certain destinations.
36560 - Fix a bug found by Lasse Overlier: when we were making internal
36561 circuits (intended to be cannibalized later for rendezvous and
36562 introduction circuits), we were picking them so that they had
36563 useful exit nodes. There was no need for this, and it actually
36564 aids some statistical attacks.
36565 - Start treating internal circuits and exit circuits separately.
36566 It's important to keep them separate because internal circuits
36567 have their last hops picked like middle hops, rather than like
36568 exit hops. So exiting on them will break the user's expectations.
36570 o Bugfixes on 0.1.1.x:
36571 - Take out the mis-feature where we tried to detect IP address
36572 flapping for people with DynDNS, and chose not to upload a new
36573 server descriptor sometimes.
36574 - Try to be compatible with OpenSSL 0.9.6 again.
36575 - Log fix: when the controller is logging about .onion addresses,
36576 sometimes it didn't include the ".onion" part of the address.
36577 - Don't try to modify options->DirServers internally -- if the
36578 user didn't specify any, just add the default ones directly to
36579 the trusted dirserver list. This fixes a bug where people running
36580 controllers would use SETCONF on some totally unrelated config
36581 option, and Tor would start yelling at them about changing their
36583 - Let the controller's redirectstream command specify a port, in
36584 case the controller wants to change that too.
36585 - When we requested a pile of server descriptors, we sometimes
36586 accidentally launched a duplicate request for the first one.
36587 - Bugfix for trackhostexits: write down the fingerprint of the
36588 chosen exit, not its nickname, because the chosen exit might not
36590 - When parsing foo.exit, if foo is unknown, and we are leaving
36591 circuits unattached, set the chosen_exit field and leave the
36592 address empty. This matters because controllers got confused
36594 - Directory authorities no longer try to download server
36595 descriptors that they know they will reject.
36597 o Features and updates:
36598 - Replace balanced trees with hash tables: this should make stuff
36599 significantly faster.
36600 - Resume using the AES counter-mode implementation that we ship,
36601 rather than OpenSSL's. Ours is significantly faster.
36602 - Many other CPU and memory improvements.
36603 - Add a new config option FastFirstHopPK (on by default) so clients
36604 do a trivial crypto handshake for their first hop, since TLS has
36605 already taken care of confidentiality and authentication.
36606 - Add a new config option TestSocks so people can see if their
36607 applications are using socks4, socks4a, socks5-with-ip, or
36608 socks5-with-hostname. This way they don't have to keep mucking
36609 with tcpdump and wondering if something got cached somewhere.
36610 - Warn when listening on a public address for socks. I suspect a
36611 lot of people are setting themselves up as open socks proxies,
36612 and they have no idea that jerks on the Internet are using them,
36613 since they simply proxy the traffic into the Tor network.
36614 - Add "private:*" as an alias in configuration for policies. Now
36615 you can simplify your exit policy rather than needing to list
36616 every single internal or nonroutable network space.
36617 - Add a new controller event type that allows controllers to get
36618 all server descriptors that were uploaded to a router in its role
36619 as authoritative dirserver.
36620 - Start shipping socks-extensions.txt, tor-doc-unix.html,
36621 tor-doc-server.html, and stylesheet.css in the tarball.
36622 - Stop shipping tor-doc.html in the tarball.
36625 Changes in version 0.1.1.9-alpha - 2005-11-15
36626 o Usability improvements:
36627 - Start calling it FooListenAddress rather than FooBindAddress,
36628 since few of our users know what it means to bind an address
36630 - Reduce clutter in server logs. We're going to try to make
36631 them actually usable now. New config option ProtocolWarnings that
36632 lets you hear about how _other Tors_ are breaking the protocol. Off
36634 - Divide log messages into logging domains. Once we put some sort
36635 of interface on this, it will let people looking at more verbose
36636 log levels specify the topics they want to hear more about.
36637 - Make directory servers return better http 404 error messages
36638 instead of a generic "Servers unavailable".
36639 - Check for even more Windows version flags when writing the platform
36640 string in server descriptors, and note any we don't recognize.
36641 - Clean up more of the OpenSSL memory when exiting, so we can detect
36642 memory leaks better.
36643 - Make directory authorities be non-versioning, non-naming by
36644 default. Now we can add new directory servers without requiring
36645 their operators to pay close attention.
36646 - When logging via syslog, include the pid whenever we provide
36647 a log entry. Suggested by Todd Fries.
36649 o Performance improvements:
36650 - Directory servers now silently throw away new descriptors that
36651 haven't changed much if the timestamps are similar. We do this to
36652 tolerate older Tor servers that upload a new descriptor every 15
36653 minutes. (It seemed like a good idea at the time.)
36654 - Inline bottleneck smartlist functions; use fast versions by default.
36655 - Add a "Map from digest to void*" abstraction digestmap_t so we
36656 can do less hex encoding/decoding. Use it in router_get_by_digest()
36657 to resolve a performance bottleneck.
36658 - Allow tor_gzip_uncompress to extract as much as possible from
36659 truncated compressed data. Try to extract as many
36660 descriptors as possible from truncated http responses (when
36661 DIR_PURPOSE_FETCH_ROUTERDESC).
36662 - Make circ->onionskin a pointer, not a static array. moria2 was using
36663 125000 circuit_t's after it had been up for a few weeks, which
36664 translates to 20+ megs of wasted space.
36665 - The private half of our EDH handshake keys are now chosen out
36666 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
36668 o Security improvements:
36669 - Start making directory caches retain old routerinfos, so soon
36670 clients can start asking by digest of descriptor rather than by
36671 fingerprint of server.
36672 - Add half our entropy from RAND_poll in OpenSSL. This knows how
36673 to use egd (if present), openbsd weirdness (if present), vms/os2
36674 weirdness (if we ever port there), and more in the future.
36676 o Bugfixes on 0.1.0.x:
36677 - Do round-robin writes of at most 16 kB per write. This might be
36678 more fair on loaded Tor servers, and it might resolve our Windows
36679 crash bug. It might also slow things down.
36680 - Our TLS handshakes were generating a single public/private
36681 keypair for the TLS context, rather than making a new one for
36682 each new connections. Oops. (But we were still rotating them
36683 periodically, so it's not so bad.)
36684 - When we were cannibalizing a circuit with a particular exit
36685 node in mind, we weren't checking to see if that exit node was
36686 already present earlier in the circuit. Oops.
36687 - When a Tor server's IP changes (e.g. from a dyndns address),
36688 upload a new descriptor so clients will learn too.
36689 - Really busy servers were keeping enough circuits open on stable
36690 connections that they were wrapping around the circuit_id
36691 space. (It's only two bytes.) This exposed a bug where we would
36692 feel free to reuse a circuit_id even if it still exists but has
36693 been marked for close. Try to fix this bug. Some bug remains.
36694 - If we would close a stream early (e.g. it asks for a .exit that
36695 we know would refuse it) but the LeaveStreamsUnattached config
36696 option is set by the controller, then don't close it.
36698 o Bugfixes on 0.1.1.8-alpha:
36699 - Fix a big pile of memory leaks, some of them serious.
36700 - Do not try to download a routerdesc if we would immediately reject
36702 - Resume inserting a newline between all router descriptors when
36703 generating (old style) signed directories, since our spec says
36705 - When providing content-type application/octet-stream for
36706 server descriptors using .z, we were leaving out the
36707 content-encoding header. Oops. (Everything tolerated this just
36708 fine, but that doesn't mean we need to be part of the problem.)
36709 - Fix a potential seg fault in getconf and getinfo using version 1
36710 of the controller protocol.
36711 - Avoid crash: do not check whether DirPort is reachable when we
36712 are suppressing it because of hibernation.
36713 - Make --hash-password not crash on exit.
36716 Changes in version 0.1.1.8-alpha - 2005-10-07
36717 o New features (major):
36718 - Clients don't download or use the directory anymore. Now they
36719 download and use network-statuses from the trusted dirservers,
36720 and fetch individual server descriptors as needed from mirrors.
36721 See dir-spec.txt for all the gory details.
36722 - Be more conservative about whether to advertise our DirPort.
36723 The main change is to not advertise if we're running at capacity
36724 and either a) we could hibernate or b) our capacity is low and
36725 we're using a default DirPort.
36726 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
36728 o New features (minor):
36729 - Try to be smart about when to retry network-status and
36730 server-descriptor fetches. Still needs some tuning.
36731 - Stop parsing, storing, or using running-routers output (but
36732 mirrors still cache and serve it).
36733 - Consider a threshold of versioning dirservers (dirservers who have
36734 an opinion about which Tor versions are still recommended) before
36735 deciding whether to warn the user that he's obsolete.
36736 - Dirservers can now reject/invalidate by key and IP, with the
36737 config options "AuthDirInvalid" and "AuthDirReject". This is
36738 useful since currently we automatically list servers as running
36739 and usable even if we know they're jerks.
36740 - Provide dire warnings to any users who set DirServer; move it out
36741 of torrc.sample and into torrc.complete.
36742 - Add MyFamily to torrc.sample in the server section.
36743 - Add nicknames to the DirServer line, so we can refer to them
36744 without requiring all our users to memorize their IP addresses.
36745 - When we get an EOF or a timeout on a directory connection, note
36746 how many bytes of serverdesc we are dropping. This will help
36747 us determine whether it is smart to parse incomplete serverdesc
36749 - Add a new function to "change pseudonyms" -- that is, to stop
36750 using any currently-dirty circuits for new streams, so we don't
36751 link new actions to old actions. Currently it's only called on
36752 HUP (or SIGNAL RELOAD).
36753 - On sighup, if UseHelperNodes changed to 1, use new circuits.
36754 - Start using RAND_bytes rather than RAND_pseudo_bytes from
36755 OpenSSL. Also, reseed our entropy every hour, not just at
36756 startup. And entropy in 512-bit chunks, not 160-bit chunks.
36758 o Fixes on 0.1.1.7-alpha:
36759 - Nobody ever implemented EVENT_ADDRMAP for control protocol
36760 version 0, so don't let version 0 controllers ask for it.
36761 - If you requested something with too many newlines via the
36762 v1 controller protocol, you could crash tor.
36763 - Fix a number of memory leaks, including some pretty serious ones.
36764 - Re-enable DirPort testing again, so Tor servers will be willing
36765 to advertise their DirPort if it's reachable.
36766 - On TLS handshake, only check the other router's nickname against
36767 its expected nickname if is_named is set.
36769 o Fixes forward-ported from 0.1.0.15:
36770 - Don't crash when we don't have any spare file descriptors and we
36771 try to spawn a dns or cpu worker.
36772 - Make the numbers in read-history and write-history into uint64s,
36773 so they don't overflow and publish negatives in the descriptor.
36775 o Fixes on 0.1.0.x:
36776 - For the OS X package's modified privoxy config file, comment
36777 out the "logfile" line so we don't log everything passed
36779 - We were whining about using socks4 or socks5-with-local-lookup
36780 even when it's an IP in the "virtual" range we designed exactly
36782 - We were leaking some memory every time the client changes IPs.
36783 - Never call free() on tor_malloc()d memory. This will help us
36784 use dmalloc to detect memory leaks.
36785 - Check for named servers when looking them up by nickname;
36786 warn when we'recalling a non-named server by its nickname;
36787 don't warn twice about the same name.
36788 - Try to list MyFamily elements by key, not by nickname, and warn
36789 if we've not heard of the server.
36790 - Make windows platform detection (uname equivalent) smarter.
36791 - It turns out sparc64 doesn't like unaligned access either.
36794 Changes in version 0.1.0.15 - 2005-09-23
36795 o Bugfixes on 0.1.0.x:
36796 - Reject ports 465 and 587 (spam targets) in default exit policy.
36797 - Don't crash when we don't have any spare file descriptors and we
36798 try to spawn a dns or cpu worker.
36799 - Get rid of IgnoreVersion undocumented config option, and make us
36800 only warn, never exit, when we're running an obsolete version.
36801 - Don't try to print a null string when your server finds itself to
36802 be unreachable and the Address config option is empty.
36803 - Make the numbers in read-history and write-history into uint64s,
36804 so they don't overflow and publish negatives in the descriptor.
36805 - Fix a minor memory leak in smartlist_string_remove().
36806 - We were only allowing ourselves to upload a server descriptor at
36807 most every 20 minutes, even if it changed earlier than that.
36808 - Clean up log entries that pointed to old URLs.
36811 Changes in version 0.1.1.7-alpha - 2005-09-14
36812 o Fixes on 0.1.1.6-alpha:
36813 - Exit servers were crashing when people asked them to make a
36814 connection to an address not in their exit policy.
36815 - Looking up a non-existent stream for a v1 control connection would
36817 - Fix a seg fault if we ask a dirserver for a descriptor by
36818 fingerprint but he doesn't know about him.
36819 - SETCONF was appending items to linelists, not clearing them.
36820 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
36821 out and refuse the setconf if it would fail.
36822 - Downgrade the dirserver log messages when whining about
36826 - Add Peter Palfrader's check-tor script to tor/contrib/
36827 It lets you easily check whether a given server (referenced by
36828 nickname) is reachable by you.
36829 - Numerous changes to move towards client-side v2 directories. Not
36832 o Fixes on 0.1.0.x:
36833 - If the user gave tor an odd number of command-line arguments,
36834 we were silently ignoring the last one. Now we complain and fail.
36835 [This wins the oldest-bug prize -- this bug has been present since
36836 November 2002, as released in Tor 0.0.0.]
36837 - Do not use unaligned memory access on alpha, mips, or mipsel.
36838 It *works*, but is very slow, so we treat them as if it doesn't.
36839 - Retry directory requests if we fail to get an answer we like
36840 from a given dirserver (we were retrying before, but only if
36841 we fail to connect).
36842 - When writing the RecommendedVersions line, sort them first.
36843 - When the client asked for a rendezvous port that the hidden
36844 service didn't want to provide, we were sending an IP address
36845 back along with the end cell. Fortunately, it was zero. But stop
36847 - Correct "your server is reachable" log entries to indicate that
36848 it was self-testing that told us so.
36851 Changes in version 0.1.1.6-alpha - 2005-09-09
36852 o Fixes on 0.1.1.5-alpha:
36853 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
36854 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
36855 - Fix bug with tor_memmem finding a match at the end of the string.
36856 - Make unit tests run without segfaulting.
36857 - Resolve some solaris x86 compile warnings.
36858 - Handle duplicate lines in approved-routers files without warning.
36859 - Fix bug where as soon as a server refused any requests due to his
36860 exit policy (e.g. when we ask for localhost and he tells us that's
36861 127.0.0.1 and he won't do it), we decided he wasn't obeying his
36862 exit policy using him for any exits.
36863 - Only do openssl hardware accelerator stuff if openssl version is
36866 o New controller features/fixes:
36867 - Add a "RESETCONF" command so you can set config options like
36868 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
36869 a config option in the torrc with no value, then it clears it
36870 entirely (rather than setting it to its default).
36871 - Add a "GETINFO config-file" to tell us where torrc is.
36872 - Avoid sending blank lines when GETINFO replies should be empty.
36873 - Add a QUIT command for the controller (for using it manually).
36874 - Fix a bug in SAVECONF that was adding default dirservers and
36875 other redundant entries to the torrc file.
36877 o Start on the new directory design:
36878 - Generate, publish, cache, serve new network-status format.
36879 - Publish individual descriptors (by fingerprint, by "all", and by
36881 - Publish client and server recommended versions separately.
36882 - Allow tor_gzip_uncompress() to handle multiple concatenated
36883 compressed strings. Serve compressed groups of router
36884 descriptors. The compression logic here could be more
36886 - Distinguish v1 authorities (all currently trusted directories)
36887 from v2 authorities (all trusted directories).
36888 - Change DirServers config line to note which dirs are v1 authorities.
36889 - Add configuration option "V1AuthoritativeDirectory 1" which
36890 moria1, moria2, and tor26 should set.
36891 - Remove option when getting directory cache to see whether they
36892 support running-routers; they all do now. Replace it with one
36893 to see whether caches support v2 stuff.
36896 - Dirservers now do their own external reachability testing of each
36897 Tor server, and only list them as running if they've been found to
36898 be reachable. We also send back warnings to the server's logs if
36899 it uploads a descriptor that we already believe is unreachable.
36900 - Implement exit enclaves: if we know an IP address for the
36901 destination, and there's a running Tor server at that address
36902 which allows exit to the destination, then extend the circuit to
36903 that exit first. This provides end-to-end encryption and end-to-end
36904 authentication. Also, if the user wants a .exit address or enclave,
36905 use 4 hops rather than 3, and cannibalize a general circ for it
36907 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
36908 controller. Also, rotate dns and cpu workers if the controller
36909 changes options that will affect them; and initialize the dns
36910 worker cache tree whether or not we start out as a server.
36911 - Only upload a new server descriptor when options change, 18
36912 hours have passed, uptime is reset, or bandwidth changes a lot.
36913 - Check [X-]Forwarded-For headers in HTTP requests when generating
36914 log messages. This lets people run dirservers (and caches) behind
36915 Apache but still know which IP addresses are causing warnings.
36917 o Config option changes:
36918 - Replace (Fascist)Firewall* config options with a new
36919 ReachableAddresses option that understands address policies.
36920 For example, "ReachableAddresses *:80,*:443"
36921 - Get rid of IgnoreVersion undocumented config option, and make us
36922 only warn, never exit, when we're running an obsolete version.
36923 - Make MonthlyAccountingStart config option truly obsolete now.
36925 o Fixes on 0.1.0.x:
36926 - Reject ports 465 and 587 in the default exit policy, since
36927 people have started using them for spam too.
36928 - It turns out we couldn't bootstrap a network since we added
36929 reachability detection in 0.1.0.1-rc. Good thing the Tor network
36930 has never gone down. Add an AssumeReachable config option to let
36931 servers and dirservers bootstrap. When we're trying to build a
36932 high-uptime or high-bandwidth circuit but there aren't enough
36933 suitable servers, try being less picky rather than simply failing.
36934 - Our logic to decide if the OR we connected to was the right guy
36935 was brittle and maybe open to a mitm for unverified routers.
36936 - We weren't cannibalizing circuits correctly for
36937 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
36938 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
36939 build those from scratch. This should make hidden services faster.
36940 - Predict required circuits better, with an eye toward making hidden
36941 services faster on the service end.
36942 - Retry streams if the exit node sends back a 'misc' failure. This
36943 should result in fewer random failures. Also, after failing
36944 from resolve failed or misc, reset the num failures, so we give
36945 it a fair shake next time we try.
36946 - Clean up the rendezvous warn log msgs, and downgrade some to info.
36947 - Reduce severity on logs about dns worker spawning and culling.
36948 - When we're shutting down and we do something like try to post a
36949 server descriptor or rendezvous descriptor, don't complain that
36950 we seem to be unreachable. Of course we are, we're shutting down.
36951 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
36952 We don't use them yet, but maybe one day our DNS resolver will be
36953 able to discover them.
36954 - Make ContactInfo mandatory for authoritative directory servers.
36955 - Require server descriptors to list IPv4 addresses -- hostnames
36956 are no longer allowed. This also fixes some potential security
36957 problems with people providing hostnames as their address and then
36958 preferentially resolving them to partition users.
36959 - Change log line for unreachability to explicitly suggest /etc/hosts
36960 as the culprit. Also make it clearer what IP address and ports we're
36961 testing for reachability.
36962 - Put quotes around user-supplied strings when logging so users are
36963 more likely to realize if they add bad characters (like quotes)
36965 - Let auth dir servers start without specifying an Address config
36967 - Make unit tests (and other invocations that aren't the real Tor)
36968 run without launching listeners, creating subdirectories, and so on.
36971 Changes in version 0.1.1.5-alpha - 2005-08-08
36972 o Bugfixes included in 0.1.0.14.
36974 o Bugfixes on 0.1.0.x:
36975 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
36976 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
36977 it would silently using ignore the 6668.
36980 Changes in version 0.1.0.14 - 2005-08-08
36981 o Bugfixes on 0.1.0.x:
36982 - Fix the other half of the bug with crypto handshakes
36984 - Fix an assert trigger if you send a 'signal term' via the
36985 controller when it's listening for 'event info' messages.
36988 Changes in version 0.1.1.4-alpha - 2005-08-04
36989 o Bugfixes included in 0.1.0.13.
36992 - Improve tor_gettimeofday() granularity on windows.
36993 - Make clients regenerate their keys when their IP address changes.
36994 - Implement some more GETINFO goodness: expose helper nodes, config
36995 options, getinfo keys.
36998 Changes in version 0.1.0.13 - 2005-08-04
36999 o Bugfixes on 0.1.0.x:
37000 - Fix a critical bug in the security of our crypto handshakes.
37001 - Fix a size_t underflow in smartlist_join_strings2() that made
37002 it do bad things when you hand it an empty smartlist.
37003 - Fix Windows installer to ship Tor license (thanks to Aphex for
37004 pointing out this oversight) and put a link to the doc directory
37006 - Explicitly set no-unaligned-access for sparc: it turns out the
37007 new gcc's let you compile broken code, but that doesn't make it
37011 Changes in version 0.1.1.3-alpha - 2005-07-23
37012 o Bugfixes on 0.1.1.2-alpha:
37013 - Fix a bug in handling the controller's "post descriptor"
37015 - Fix several bugs in handling the controller's "extend circuit"
37017 - Fix a bug in handling the controller's "stream status" event.
37018 - Fix an assert failure if we have a controller listening for
37019 circuit events and we go offline.
37020 - Re-allow hidden service descriptors to publish 0 intro points.
37021 - Fix a crash when generating your hidden service descriptor if
37022 you don't have enough intro points already.
37024 o New features on 0.1.1.2-alpha:
37025 - New controller function "getinfo accounting", to ask how
37026 many bytes we've used in this time period.
37027 - Experimental support for helper nodes: a lot of the risk from
37028 a small static adversary comes because users pick new random
37029 nodes every time they rebuild a circuit. Now users will try to
37030 stick to the same small set of entry nodes if they can. Not
37031 enabled by default yet.
37033 o Bugfixes on 0.1.0.12:
37034 - If you're an auth dir server, always publish your dirport,
37035 even if you haven't yet found yourself to be reachable.
37036 - Fix a size_t underflow in smartlist_join_strings2() that made
37037 it do bad things when you hand it an empty smartlist.
37040 Changes in version 0.1.0.12 - 2005-07-18
37041 o New directory servers:
37042 - tor26 has changed IP address.
37044 o Bugfixes on 0.1.0.x:
37045 - Fix a possible double-free in tor_gzip_uncompress().
37046 - When --disable-threads is set, do not search for or link against
37047 pthreads libraries.
37048 - Don't trigger an assert if an authoritative directory server
37049 claims its dirport is 0.
37050 - Fix bug with removing Tor as an NT service: some people were
37051 getting "The service did not return an error." Thanks to Matt
37055 Changes in version 0.1.1.2-alpha - 2005-07-15
37056 o New directory servers:
37057 - tor26 has changed IP address.
37059 o Bugfixes on 0.1.0.x, crashes/leaks:
37060 - Port the servers-not-obeying-their-exit-policies fix from
37062 - Fix an fd leak in start_daemon().
37063 - On Windows, you can't always reopen a port right after you've
37064 closed it. So change retry_listeners() to only close and re-open
37065 ports that have changed.
37066 - Fix a possible double-free in tor_gzip_uncompress().
37068 o Bugfixes on 0.1.0.x, usability:
37069 - When tor_socketpair() fails in Windows, give a reasonable
37070 Windows-style errno back.
37071 - Let people type "tor --install" as well as "tor -install" when
37073 want to make it an NT service.
37074 - NT service patch from Matt Edman to improve error messages.
37075 - When the controller asks for a config option with an abbreviated
37076 name, give the full name in our response.
37077 - Correct the man page entry on TrackHostExitsExpire.
37078 - Looks like we were never delivering deflated (i.e. compressed)
37079 running-routers lists, even when asked. Oops.
37080 - When --disable-threads is set, do not search for or link against
37081 pthreads libraries.
37083 o Bugfixes on 0.1.1.x:
37084 - Fix a seg fault with autodetecting which controller version is
37088 - New hidden service descriptor format: put a version in it, and
37089 let people specify introduction/rendezvous points that aren't
37090 in "the directory" (which is subjective anyway).
37091 - Allow the DEBUG controller event to work again. Mark certain log
37092 entries as "don't tell this to controllers", so we avoid cycles.
37095 Changes in version 0.1.0.11 - 2005-06-30
37096 o Bugfixes on 0.1.0.x:
37097 - Fix major security bug: servers were disregarding their
37098 exit policies if clients behaved unexpectedly.
37099 - Make OS X init script check for missing argument, so we don't
37100 confuse users who invoke it incorrectly.
37101 - Fix a seg fault in "tor --hash-password foo".
37102 - The MAPADDRESS control command was broken.
37105 Changes in version 0.1.1.1-alpha - 2005-06-29
37107 - Make OS X init script check for missing argument, so we don't
37108 confuse users who invoke it incorrectly.
37109 - Fix a seg fault in "tor --hash-password foo".
37110 - Fix a possible way to DoS dirservers.
37111 - When we complain that your exit policy implicitly allows local or
37112 private address spaces, name them explicitly so operators can
37114 - Make the log message less scary when all the dirservers are
37115 temporarily unreachable.
37116 - We were printing the number of idle dns workers incorrectly when
37120 - Revised controller protocol (version 1) that uses ascii rather
37121 than binary. Add supporting libraries in python and java so you
37122 can use the controller from your applications without caring how
37123 our protocol works.
37124 - Spiffy new support for crypto hardware accelerators. Can somebody
37128 Changes in version 0.0.9.10 - 2005-06-16
37129 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
37130 - Refuse relay cells that claim to have a length larger than the
37131 maximum allowed. This prevents a potential attack that could read
37132 arbitrary memory (e.g. keys) from an exit server's process
37136 Changes in version 0.1.0.10 - 2005-06-14
37137 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
37138 libevent before 1.1a.
37141 Changes in version 0.1.0.9-rc - 2005-06-09
37143 - Reset buf->highwater every time buf_shrink() is called, not just on
37144 a successful shrink. This was causing significant memory bloat.
37145 - Fix buffer overflow when checking hashed passwords.
37146 - Security fix: if seeding the RNG on Win32 fails, quit.
37147 - Allow seeding the RNG on Win32 even when you're not running as
37149 - Disable threading on Solaris too. Something is wonky with it,
37150 cpuworkers, and reentrant libs.
37151 - Reenable the part of the code that tries to flush as soon as an
37152 OR outbuf has a full TLS record available. Perhaps this will make
37153 OR outbufs not grow as huge except in rare cases, thus saving lots
37154 of CPU time plus memory.
37155 - Reject malformed .onion addresses rather then passing them on as
37156 normal web requests.
37157 - Adapt patch from Adam Langley: fix possible memory leak in
37158 tor_lookup_hostname().
37159 - Initialize libevent later in the startup process, so the logs are
37160 already established by the time we start logging libevent warns.
37161 - Use correct errno on win32 if libevent fails.
37162 - Check and warn about known-bad/slow libevent versions.
37163 - Pay more attention to the ClientOnly config option.
37164 - Have torctl.in/tor.sh.in check for location of su binary (needed
37166 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
37167 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
37168 HttpProxyAuthenticator
37169 - Stop warning about sigpipes in the logs. We're going to
37170 pretend that getting these occasionally is normal and fine.
37171 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
37173 installer screens; and don't put stuff into StartupItems unless
37174 the user asks you to.
37175 - Require servers that use the default dirservers to have public IP
37176 addresses. We have too many servers that are configured with private
37177 IPs and their admins never notice the log entries complaining that
37178 their descriptors are being rejected.
37179 - Add OSX uninstall instructions. An actual uninstall script will
37183 Changes in version 0.1.0.8-rc - 2005-05-23
37185 - It turns out that kqueue on OS X 10.3.9 was causing kernel
37186 panics. Disable kqueue on all OS X Tors.
37187 - Fix RPM: remove duplicate line accidentally added to the rpm
37189 - Disable threads on openbsd too, since its gethostaddr is not
37191 - Tolerate libevent 0.8 since it still works, even though it's
37193 - Enable building on Red Hat 9.0 again.
37194 - Allow the middle hop of the testing circuit to be running any
37195 version, now that most of them have the bugfix to let them connect
37196 to unknown servers. This will allow reachability testing to work
37197 even when 0.0.9.7-0.0.9.9 become obsolete.
37198 - Handle relay cells with rh.length too large. This prevents
37199 a potential attack that could read arbitrary memory (maybe even
37200 keys) from the exit server's process.
37201 - We screwed up the dirport reachability testing when we don't yet
37202 have a cached version of the directory. Hopefully now fixed.
37203 - Clean up router_load_single_router() (used by the controller),
37204 so it doesn't seg fault on error.
37205 - Fix a minor memory leak when somebody establishes an introduction
37206 point at your Tor server.
37207 - If a socks connection ends because read fails, don't warn that
37208 you're not sending a socks reply back.
37211 - Add HttpProxyAuthenticator config option too, that works like
37212 the HttpsProxyAuthenticator config option.
37213 - Encode hashed controller passwords in hex instead of base64,
37214 to make it easier to write controllers.
37217 Changes in version 0.1.0.7-rc - 2005-05-17
37219 - Fix a bug in the OS X package installer that prevented it from
37220 installing on Tiger.
37221 - Fix a script bug in the OS X package installer that made it
37222 complain during installation.
37223 - Find libevent even if it's hiding in /usr/local/ and your
37224 CFLAGS and LDFLAGS don't tell you to look there.
37225 - Be able to link with libevent as a shared library (the default
37226 after 1.0d), even if it's hiding in /usr/local/lib and even
37227 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
37228 assuming you're running gcc. Otherwise fail and give a useful
37230 - Fix a bug in the RPM packager: set home directory for _tor to
37231 something more reasonable when first installing.
37232 - Free a minor amount of memory that is still reachable on exit.
37235 Changes in version 0.1.0.6-rc - 2005-05-14
37237 - Implement --disable-threads configure option. Disable threads on
37238 netbsd by default, because it appears to have no reentrant resolver
37240 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
37241 release (1.1) detects and disables kqueue if it's broken.
37242 - Append default exit policy before checking for implicit internal
37243 addresses. Now we don't log a bunch of complaints on startup
37244 when using the default exit policy.
37245 - Some people were putting "Address " in their torrc, and they had
37246 a buggy resolver that resolved " " to 0.0.0.0. Oops.
37247 - If DataDir is ~/.tor, and that expands to /.tor, then default to
37248 LOCALSTATEDIR/tor instead.
37249 - Fix fragmented-message bug in TorControl.py.
37250 - Resolve a minor bug which would prevent unreachable dirports
37251 from getting suppressed in the published descriptor.
37252 - When the controller gave us a new descriptor, we weren't resolving
37253 it immediately, so Tor would think its address was 0.0.0.0 until
37254 we fetched a new directory.
37255 - Fix an uppercase/lowercase case error in suppressing a bogus
37256 libevent warning on some Linuxes.
37259 - Begin scrubbing sensitive strings from logs by default. Turn off
37260 the config option SafeLogging if you need to do debugging.
37261 - Switch to a new buffer management algorithm, which tries to avoid
37262 reallocing and copying quite as much. In first tests it looks like
37263 it uses *more* memory on average, but less cpu.
37264 - First cut at support for "create-fast" cells. Clients can use
37265 these when extending to their first hop, since the TLS already
37266 provides forward secrecy and authentication. Not enabled on
37268 - When dirservers refuse a router descriptor, we now log its
37269 contactinfo, platform, and the poster's IP address.
37270 - Call tor_free_all instead of connections_free_all after forking, to
37271 save memory on systems that need to fork.
37272 - Whine at you if you're a server and you don't set your contactinfo.
37273 - Implement --verify-config command-line option to check if your torrc
37274 is valid without actually launching Tor.
37275 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
37276 rather than just rejecting it.
37279 Changes in version 0.1.0.5-rc - 2005-04-27
37281 - Stop trying to print a null pointer if an OR conn fails because
37282 we didn't like its cert.
37284 - Switch our internal buffers implementation to use a ring buffer,
37285 to hopefully improve performance for fast servers a lot.
37286 - Add HttpsProxyAuthenticator support (basic auth only), based
37287 on patch from Adam Langley.
37288 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
37289 the fast servers that have been joining lately.
37290 - Give hidden service accesses extra time on the first attempt,
37291 since 60 seconds is often only barely enough. This might improve
37293 - Improve performance for dirservers: stop re-parsing the whole
37294 directory every time you regenerate it.
37295 - Add more debugging info to help us find the weird dns freebsd
37296 pthreads bug; cleaner debug messages to help track future issues.
37299 Changes in version 0.0.9.9 - 2005-04-23
37300 o Bugfixes on 0.0.9.x:
37301 - If unofficial Tor clients connect and send weird TLS certs, our
37302 Tor server triggers an assert. This release contains a minimal
37303 backport from the broader fix that we put into 0.1.0.4-rc.
37306 Changes in version 0.1.0.4-rc - 2005-04-23
37308 - If unofficial Tor clients connect and send weird TLS certs, our
37309 Tor server triggers an assert. Stop asserting, and start handling
37310 TLS errors better in other situations too.
37311 - When the controller asks us to tell it about all the debug-level
37312 logs, it turns out we were generating debug-level logs while
37313 telling it about them, which turns into a bad loop. Now keep
37314 track of whether you're sending a debug log to the controller,
37315 and don't log when you are.
37316 - Fix the "postdescriptor" feature of the controller interface: on
37317 non-complete success, only say "done" once.
37319 - Clients are now willing to load balance over up to 2mB, not 1mB,
37320 of advertised bandwidth capacity.
37321 - Add a NoPublish config option, so you can be a server (e.g. for
37322 testing running Tor servers in other Tor networks) without
37323 publishing your descriptor to the primary dirservers.
37326 Changes in version 0.1.0.3-rc - 2005-04-08
37327 o Improvements on 0.1.0.2-rc:
37328 - Client now retries when streams end early for 'hibernating' or
37329 'resource limit' reasons, rather than failing them.
37330 - More automated handling for dirserver operators:
37331 - Automatically approve nodes running 0.1.0.2-rc or later,
37332 now that the the reachability detection stuff is working.
37333 - Now we allow two unverified servers with the same nickname
37334 but different keys. But if a nickname is verified, only that
37335 nickname+key are allowed.
37336 - If you're an authdirserver connecting to an address:port,
37337 and it's not the OR you were expecting, forget about that
37338 descriptor. If he *was* the one you were expecting, then forget
37339 about all other descriptors for that address:port.
37340 - Allow servers to publish descriptors from 12 hours in the future.
37341 Corollary: only whine about clock skew from the dirserver if
37342 he's a trusted dirserver (since now even verified servers could
37343 have quite wrong clocks).
37344 - Adjust maximum skew and age for rendezvous descriptors: let skew
37345 be 48 hours rather than 90 minutes.
37346 - Efficiency improvements:
37347 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
37348 it much faster to look up a circuit for each relay cell.
37349 - Remove most calls to assert_all_pending_dns_resolves_ok(),
37350 since they're eating our cpu on exit nodes.
37351 - Stop wasting time doing a case insensitive comparison for every
37352 dns name every time we do any lookup. Canonicalize the names to
37353 lowercase and be done with it.
37354 - Start sending 'truncated' cells back rather than destroy cells,
37355 if the circuit closes in front of you. This means we won't have
37356 to abandon partially built circuits.
37357 - Only warn once per nickname from add_nickname_list_to_smartlist
37358 per failure, so an entrynode or exitnode choice that's down won't
37360 - Put a note in the torrc about abuse potential with the default
37362 - Revise control spec and implementation to allow all log messages to
37363 be sent to controller with their severities intact (suggested by
37364 Matt Edman). Update TorControl to handle new log event types.
37365 - Provide better explanation messages when controller's POSTDESCRIPTOR
37367 - Stop putting nodename in the Platform string in server descriptors.
37368 It doesn't actually help, and it is confusing/upsetting some people.
37370 o Bugfixes on 0.1.0.2-rc:
37371 - We were printing the host mask wrong in exit policies in server
37372 descriptors. This isn't a critical bug though, since we were still
37373 obeying the exit policy internally.
37374 - Fix Tor when compiled with libevent but without pthreads: move
37375 connection_unregister() from _connection_free() to
37377 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
37378 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
37379 when we look through the connection array, we'll find any of the
37380 cpu/dnsworkers. This is no good.
37382 o Bugfixes on 0.0.9.8:
37383 - Fix possible bug on threading platforms (e.g. win32) which was
37384 leaking a file descriptor whenever a cpuworker or dnsworker died.
37385 - When using preferred entry or exit nodes, ignore whether the
37386 circuit wants uptime or capacity. They asked for the nodes, they
37388 - chdir() to your datadirectory at the *end* of the daemonize process,
37389 not the beginning. This was a problem because the first time you
37390 run tor, if your datadir isn't there, and you have runasdaemon set
37391 to 1, it will try to chdir to it before it tries to create it. Oops.
37392 - Handle changed router status correctly when dirserver reloads
37393 fingerprint file. We used to be dropping all unverified descriptors
37394 right then. The bug was hidden because we would immediately
37395 fetch a directory from another dirserver, which would include the
37396 descriptors we just dropped.
37397 - When we're connecting to an OR and he's got a different nickname/key
37398 than we were expecting, only complain loudly if we're an OP or a
37399 dirserver. Complaining loudly to the OR admins just confuses them.
37400 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
37401 artificially capped at 500kB.
37404 Changes in version 0.0.9.8 - 2005-04-07
37405 o Bugfixes on 0.0.9.x:
37406 - We have a bug that I haven't found yet. Sometimes, very rarely,
37407 cpuworkers get stuck in the 'busy' state, even though the cpuworker
37408 thinks of itself as idle. This meant that no new circuits ever got
37409 established. Here's a workaround to kill any cpuworker that's been
37410 busy for more than 100 seconds.
37413 Changes in version 0.1.0.2-rc - 2005-04-01
37414 o Bugfixes on 0.1.0.1-rc:
37415 - Fixes on reachability detection:
37416 - Don't check for reachability while hibernating.
37417 - If ORPort is reachable but DirPort isn't, still publish the
37418 descriptor, but zero out DirPort until it's found reachable.
37419 - When building testing circs for ORPort testing, use only
37420 high-bandwidth nodes, so fewer circuits fail.
37421 - Complain about unreachable ORPort separately from unreachable
37422 DirPort, so the user knows what's going on.
37423 - Make sure we only conclude ORPort reachability if we didn't
37424 initiate the conn. Otherwise we could falsely conclude that
37425 we're reachable just because we connected to the guy earlier
37426 and he used that same pipe to extend to us.
37427 - Authdirservers shouldn't do ORPort reachability detection,
37428 since they're in clique mode, so it will be rare to find a
37429 server not already connected to them.
37430 - When building testing circuits, always pick middle hops running
37431 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
37432 bug. (This is a kludge; it will go away when 0.0.9.x becomes
37434 - When we decide we're reachable, actually publish our descriptor
37436 - Fix bug in redirectstream in the controller.
37437 - Fix the state descriptor strings so logs don't claim edge streams
37438 are in a different state than they actually are.
37439 - Use recent libevent features when possible (this only really affects
37440 win32 and osx right now, because the new libevent with these
37441 features hasn't been released yet). Add code to suppress spurious
37443 - Prevent possible segfault in connection_close_unattached_ap().
37444 - Fix newlines on torrc in win32.
37445 - Improve error msgs when tor-resolve fails.
37447 o Improvements on 0.0.9.x:
37448 - New experimental script tor/contrib/ExerciseServer.py (needs more
37449 work) that uses the controller interface to build circuits and
37450 fetch pages over them. This will help us bootstrap servers that
37451 have lots of capacity but haven't noticed it yet.
37452 - New experimental script tor/contrib/PathDemo.py (needs more work)
37453 that uses the controller interface to let you choose whole paths
37455 "<hostname>.<path,separated by dots>.<length of path>.path"
37456 - When we've connected to an OR and handshaked but didn't like
37457 the result, we were closing the conn without sending destroy
37458 cells back for pending circuits. Now send those destroys.
37461 Changes in version 0.0.9.7 - 2005-04-01
37462 o Bugfixes on 0.0.9.x:
37463 - Fix another race crash bug (thanks to Glenn Fink for reporting).
37464 - Compare identity to identity, not to nickname, when extending to
37465 a router not already in the directory. This was preventing us from
37466 extending to unknown routers. Oops.
37467 - Make sure to create OS X Tor user in <500 range, so we aren't
37468 creating actual system users.
37469 - Note where connection-that-hasn't-sent-end was marked, and fix
37470 a few really loud instances of this harmless bug (it's fixed more
37474 Changes in version 0.1.0.1-rc - 2005-03-28
37476 - Add reachability testing. Your Tor server will automatically try
37477 to see if its ORPort and DirPort are reachable from the outside,
37478 and it won't upload its descriptor until it decides they are.
37479 - Handle unavailable hidden services better. Handle slow or busy
37480 hidden services better.
37481 - Add support for CONNECTing through https proxies, with "HttpsProxy"
37483 - New exit policy: accept most low-numbered ports, rather than
37484 rejecting most low-numbered ports.
37485 - More Tor controller support (still experimental). See
37486 http://tor.eff.org/doc/control-spec.txt for all the new features,
37487 including signals to emulate unix signals from any platform;
37488 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
37489 closestream; closecircuit; etc.
37490 - Make nt services work and start on startup on win32 (based on
37491 patch by Matt Edman).
37492 - Add a new AddressMap config directive to rewrite incoming socks
37493 addresses. This lets you, for example, declare an implicit
37494 required exit node for certain sites.
37495 - Add a new TrackHostExits config directive to trigger addressmaps
37496 for certain incoming socks addresses -- for sites that break when
37497 your exit keeps changing (based on patch by Mike Perry).
37498 - Redo the client-side dns cache so it's just an addressmap too.
37499 - Notice when our IP changes, and reset stats/uptime/reachability.
37500 - When an application is using socks5, give him the whole variety of
37501 potential socks5 responses (connect refused, host unreachable, etc),
37502 rather than just "success" or "failure".
37503 - A more sane version numbering system. See
37504 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
37505 - New contributed script "exitlist": a simple python script to
37506 parse directories and find Tor nodes that exit to listed
37508 - New contributed script "privoxy-tor-toggle" to toggle whether
37509 Privoxy uses Tor. Seems to be configured for Debian by default.
37510 - Report HTTP reasons to client when getting a response from directory
37511 servers -- so you can actually know what went wrong.
37512 - New config option MaxAdvertisedBandwidth which lets you advertise
37513 a low bandwidthrate (to not attract as many circuits) while still
37514 allowing a higher bandwidthrate in reality.
37516 o Robustness/stability fixes:
37517 - Make Tor use Niels Provos's libevent instead of its current
37518 poll-but-sometimes-select mess. This will let us use faster async
37519 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
37521 - pthread support now too. This was forced because when we forked,
37522 we ended up wasting a lot of duplicate ram over time. Also switch
37523 to foo_r versions of some library calls to allow reentry and
37525 - Better handling for heterogeneous / unreliable nodes:
37526 - Annotate circuits w/ whether they aim to contain high uptime nodes
37527 and/or high capacity nodes. When building circuits, choose
37529 - This means that every single node in an intro rend circuit,
37530 not just the last one, will have a minimum uptime.
37531 - New config option LongLivedPorts to indicate application streams
37532 that will want high uptime circuits.
37533 - Servers reset uptime when a dir fetch entirely fails. This
37534 hopefully reflects stability of the server's network connectivity.
37535 - If somebody starts his tor server in Jan 2004 and then fixes his
37536 clock, don't make his published uptime be a year.
37537 - Reset published uptime when you wake up from hibernation.
37538 - Introduce a notion of 'internal' circs, which are chosen without
37539 regard to the exit policy of the last hop. Intro and rendezvous
37540 circs must be internal circs, to avoid leaking information. Resolve
37541 and connect streams can use internal circs if they want.
37542 - New circuit pooling algorithm: make sure to have enough circs around
37543 to satisfy any predicted ports, and also make sure to have 2 internal
37544 circs around if we've required internal circs lately (and with high
37545 uptime if we've seen that lately too).
37546 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
37547 which describes how often we retry making new circuits if current
37548 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
37549 how long we're willing to make use of an already-dirty circuit.
37550 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
37551 circ as necessary, if there are any completed ones lying around
37552 when we try to launch one.
37553 - Make hidden services try to establish a rendezvous for 30 seconds,
37554 rather than for n (where n=3) attempts to build a circuit.
37555 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
37556 "ShutdownWaitLength".
37557 - Try to be more zealous about calling connection_edge_end when
37558 things go bad with edge conns in connection.c.
37559 - Revise tor-spec to add more/better stream end reasons.
37560 - Revise all calls to connection_edge_end to avoid sending "misc",
37561 and to take errno into account where possible.
37564 - Fix a race condition that can trigger an assert, when we have a
37565 pending create cell and an OR connection fails right then.
37566 - Fix several double-mark-for-close bugs, e.g. where we were finding
37567 a conn for a cell even if that conn is already marked for close.
37568 - Make sequence of log messages when starting on win32 with no config
37569 file more reasonable.
37570 - When choosing an exit node for a new non-internal circ, don't take
37571 into account whether it'll be useful for any pending x.onion
37572 addresses -- it won't.
37573 - Turn addr_policy_compare from a tristate to a quadstate; this should
37574 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
37575 for google.com" problem.
37576 - Make "platform" string in descriptor more accurate for Win32 servers,
37577 so it's not just "unknown platform".
37578 - Fix an edge case in parsing config options (thanks weasel).
37579 If they say "--" on the commandline, it's not an option.
37580 - Reject odd-looking addresses at the client (e.g. addresses that
37581 contain a colon), rather than having the server drop them because
37583 - tor-resolve requests were ignoring .exit if there was a working circuit
37584 they could use instead.
37585 - REUSEADDR on normal platforms means you can rebind to the port
37586 right after somebody else has let it go. But REUSEADDR on win32
37587 means to let you bind to the port _even when somebody else
37588 already has it bound_! So, don't do that on Win32.
37589 - Change version parsing logic: a version is "obsolete" if it is not
37590 recommended and (1) there is a newer recommended version in the
37591 same series, or (2) there are no recommended versions in the same
37592 series, but there are some recommended versions in a newer series.
37593 A version is "new" if it is newer than any recommended version in
37595 - Stop most cases of hanging up on a socks connection without sending
37599 - Require BandwidthRate to be at least 20kB/s for servers.
37600 - When a dirserver causes you to give a warn, mention which dirserver
37602 - New config option DirAllowPrivateAddresses for authdirservers.
37603 Now by default they refuse router descriptors that have non-IP or
37604 private-IP addresses.
37605 - Stop publishing socksport in the directory, since it's not
37606 actually meant to be public. For compatibility, publish a 0 there
37608 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
37609 smart" value, that is low for servers and high for clients.
37610 - If our clock jumps forward by 100 seconds or more, assume something
37611 has gone wrong with our network and abandon all not-yet-used circs.
37612 - Warn when exit policy implicitly allows local addresses.
37613 - If we get an incredibly skewed timestamp from a dirserver mirror
37614 that isn't a verified OR, don't warn -- it's probably him that's
37616 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
37617 cookies to disk and doesn't log each web request to disk. (Thanks
37618 to Brett Carrington for pointing this out.)
37619 - When a client asks us for a dir mirror and we don't have one,
37620 launch an attempt to get a fresh one.
37621 - If we're hibernating and we get a SIGINT, exit immediately.
37622 - Add --with-dmalloc ./configure option, to track memory leaks.
37623 - And try to free all memory on closing, so we can detect what
37625 - Cache local dns resolves correctly even when they're .exit
37627 - Give a better warning when some other server advertises an
37628 ORPort that is actually an apache running ssl.
37629 - Add "opt hibernating 1" to server descriptor to make it clearer
37630 whether the server is hibernating.
37633 Changes in version 0.0.9.6 - 2005-03-24
37634 o Bugfixes on 0.0.9.x (crashes and asserts):
37635 - Add new end stream reasons to maintenance branch. Fix bug where
37636 reason (8) could trigger an assert. Prevent bug from recurring.
37637 - Apparently win32 stat wants paths to not end with a slash.
37638 - Fix assert triggers in assert_cpath_layer_ok(), where we were
37639 blowing away the circuit that conn->cpath_layer points to, then
37640 checking to see if the circ is well-formed. Backport check to make
37641 sure we dont use the cpath on a closed connection.
37642 - Prevent circuit_resume_edge_reading_helper() from trying to package
37643 inbufs for marked-for-close streams.
37644 - Don't crash on hup if your options->address has become unresolvable.
37645 - Some systems (like OS X) sometimes accept() a connection and tell
37646 you the remote host is 0.0.0.0:0. If this happens, due to some
37647 other mis-features, we get confused; so refuse the conn for now.
37649 o Bugfixes on 0.0.9.x (other):
37650 - Fix harmless but scary "Unrecognized content encoding" warn message.
37651 - Add new stream error reason: TORPROTOCOL reason means "you are not
37652 speaking a version of Tor I understand; say bye-bye to your stream."
37653 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
37654 into the future, now that we are more tolerant of skew. This
37655 resolves a bug where a Tor server would refuse to cache a directory
37656 because all the directories it gets are too far in the future;
37657 yet the Tor server never logs any complaints about clock skew.
37658 - Mac packaging magic: make man pages useable, and do not overwrite
37659 existing torrc files.
37660 - Make OS X log happily to /var/log/tor/tor.log
37663 Changes in version 0.0.9.5 - 2005-02-22
37664 o Bugfixes on 0.0.9.x:
37665 - Fix an assert race at exit nodes when resolve requests fail.
37666 - Stop picking unverified dir mirrors--it only leads to misery.
37667 - Patch from Matt Edman to make NT services work better. Service
37668 support is still not compiled into the executable by default.
37669 - Patch from Dmitri Bely so the Tor service runs better under
37670 the win32 SYSTEM account.
37671 - Make tor-resolve actually work (?) on Win32.
37672 - Fix a sign bug when getrlimit claims to have 4+ billion
37673 file descriptors available.
37674 - Stop refusing to start when bandwidthburst == bandwidthrate.
37675 - When create cells have been on the onion queue more than five
37676 seconds, just send back a destroy and take them off the list.
37679 Changes in version 0.0.9.4 - 2005-02-03
37680 o Bugfixes on 0.0.9:
37681 - Fix an assert bug that took down most of our servers: when
37682 a server claims to have 1 GB of bandwidthburst, don't
37684 - Don't crash as badly if we have spawned the max allowed number
37685 of dnsworkers, or we're out of file descriptors.
37686 - Block more file-sharing ports in the default exit policy.
37687 - MaxConn is now automatically set to the hard limit of max
37688 file descriptors we're allowed (ulimit -n), minus a few for
37690 - Give a clearer message when servers need to raise their
37691 ulimit -n when they start running out of file descriptors.
37692 - SGI Compatibility patches from Jan Schaumann.
37693 - Tolerate a corrupt cached directory better.
37694 - When a dirserver hasn't approved your server, list which one.
37695 - Go into soft hibernation after 95% of the bandwidth is used,
37696 not 99%. This is especially important for daily hibernators who
37697 have a small accounting max. Hopefully it will result in fewer
37698 cut connections when the hard hibernation starts.
37699 - Load-balance better when using servers that claim more than
37700 800kB/s of capacity.
37701 - Make NT services work (experimental, only used if compiled in).
37704 Changes in version 0.0.9.3 - 2005-01-21
37705 o Bugfixes on 0.0.9:
37706 - Backport the cpu use fixes from main branch, so busy servers won't
37707 need as much processor time.
37708 - Work better when we go offline and then come back, or when we
37709 run Tor at boot before the network is up. We do this by
37710 optimistically trying to fetch a new directory whenever an
37711 application request comes in and we think we're offline -- the
37712 human is hopefully a good measure of when the network is back.
37713 - Backport some minimal hidserv bugfixes: keep rend circuits open as
37714 long as you keep using them; actually publish hidserv descriptors
37715 shortly after they change, rather than waiting 20-40 minutes.
37716 - Enable Mac startup script by default.
37717 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
37718 - When you update AllowUnverifiedNodes or FirewallPorts via the
37719 controller's setconf feature, we were always appending, never
37721 - When you update HiddenServiceDir via setconf, it was screwing up
37722 the order of reading the lines, making it fail.
37723 - Do not rewrite a cached directory back to the cache; otherwise we
37724 will think it is recent and not fetch a newer one on startup.
37725 - Workaround for webservers that lie about Content-Encoding: Tor
37726 now tries to autodetect compressed directories and compression
37727 itself. This lets us Proxypass dir fetches through apache.
37730 Changes in version 0.0.9.2 - 2005-01-04
37731 o Bugfixes on 0.0.9 (crashes and asserts):
37732 - Fix an assert on startup when the disk is full and you're logging
37734 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
37735 style address, then we'd crash.
37736 - Fix an assert trigger when the running-routers string we get from
37737 a dirserver is broken.
37738 - Make worker threads start and run on win32. Now win32 servers
37740 - Bandaid (not actually fix, but now it doesn't crash) an assert
37741 where the dns worker dies mysteriously and the main Tor process
37742 doesn't remember anything about the address it was resolving.
37744 o Bugfixes on 0.0.9 (Win32):
37745 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
37746 name out of the warning/assert messages.
37747 - Fix a superficial "unhandled error on read" bug on win32.
37748 - The win32 installer no longer requires a click-through for our
37749 license, since our Free Software license grants rights but does not
37751 - Win32: When connecting to a dirserver fails, try another one
37752 immediately. (This was already working for non-win32 Tors.)
37753 - Stop trying to parse $HOME on win32 when hunting for default
37755 - Make tor-resolve.c work on win32 by calling network_init().
37757 o Bugfixes on 0.0.9 (other):
37758 - Make 0.0.9.x build on Solaris again.
37759 - Due to a fencepost error, we were blowing away the \n when reporting
37760 confvalue items in the controller. So asking for multiple config
37761 values at once couldn't work.
37762 - When listing circuits that are pending on an opening OR connection,
37763 if we're an OR we were listing circuits that *end* at us as
37764 being pending on every listener, dns/cpu worker, etc. Stop that.
37765 - Dirservers were failing to create 'running-routers' or 'directory'
37766 strings if we had more than some threshold of routers. Fix them so
37767 they can handle any number of routers.
37768 - Fix a superficial "Duplicate mark for close" bug.
37769 - Stop checking for clock skew for OR connections, even for servers.
37770 - Fix a fencepost error that was chopping off the last letter of any
37771 nickname that is the maximum allowed nickname length.
37772 - Update URLs in log messages so they point to the new website.
37773 - Fix a potential problem in mangling server private keys while
37774 writing to disk (not triggered yet, as far as we know).
37775 - Include the licenses for other free software we include in Tor,
37776 now that we're shipping binary distributions more regularly.
37779 Changes in version 0.0.9.1 - 2004-12-15
37780 o Bugfixes on 0.0.9:
37781 - Make hibernation actually work.
37782 - Make HashedControlPassword config option work.
37783 - When we're reporting event circuit status to a controller,
37784 don't use the stream status code.
37787 Changes in version 0.0.9 - 2004-12-12
37789 - Clean up manpage and torrc.sample file.
37790 - Clean up severities and text of log warnings.
37792 - Make servers trigger an assert when they enter hibernation.
37795 Changes in version 0.0.9rc7 - 2004-12-08
37796 o Bugfixes on 0.0.9rc:
37797 - Fix a stack-trashing crash when an exit node begins hibernating.
37798 - Avoid looking at unallocated memory while considering which
37799 ports we need to build circuits to cover.
37800 - Stop a sigpipe: when an 'end' cell races with eof from the app,
37801 we shouldn't hold-open-until-flush if the eof arrived first.
37802 - Fix a bug with init_cookie_authentication() in the controller.
37803 - When recommending new-format log lines, if the upper bound is
37804 LOG_ERR, leave it implicit.
37806 o Bugfixes on 0.0.8.1:
37807 - Fix a whole slew of memory leaks.
37808 - Fix isspace() and friends so they still make Solaris happy
37809 but also so they don't trigger asserts on win32.
37810 - Fix parse_iso_time on platforms without strptime (eg win32).
37811 - win32: tolerate extra "readable" events better.
37812 - win32: when being multithreaded, leave parent fdarray open.
37813 - Make unit tests work on win32.
37816 Changes in version 0.0.9rc6 - 2004-12-06
37817 o Bugfixes on 0.0.9pre:
37818 - Clean up some more integer underflow opportunities (not exploitable
37820 - While hibernating, hup should not regrow our listeners.
37821 - Send an end to the streams we close when we hibernate, rather
37822 than just chopping them off.
37823 - React to eof immediately on non-open edge connections.
37825 o Bugfixes on 0.0.8.1:
37826 - Calculate timeout for waiting for a connected cell from the time
37827 we sent the begin cell, not from the time the stream started. If
37828 it took a long time to establish the circuit, we would time out
37829 right after sending the begin cell.
37830 - Fix router_compare_addr_to_addr_policy: it was not treating a port
37831 of * as always matching, so we were picking reject *:* nodes as
37832 exit nodes too. Oops.
37835 - New circuit building strategy: keep a list of ports that we've
37836 used in the past 6 hours, and always try to have 2 circuits open
37837 or on the way that will handle each such port. Seed us with port
37838 80 so web users won't complain that Tor is "slow to start up".
37839 - Make kill -USR1 dump more useful stats about circuits.
37840 - When warning about retrying or giving up, print the address, so
37841 the user knows which one it's talking about.
37842 - If you haven't used a clean circuit in an hour, throw it away,
37843 just to be on the safe side. (This means after 6 hours a totally
37844 unused Tor client will have no circuits open.)
37847 Changes in version 0.0.9rc5 - 2004-12-01
37848 o Bugfixes on 0.0.8.1:
37849 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
37850 - Let resolve conns retry/expire also, rather than sticking around
37852 - If we are using select, make sure we stay within FD_SETSIZE.
37854 o Bugfixes on 0.0.9pre:
37855 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
37856 but doesn't seem to be currently; thanks to Ilja van Sprundel for
37858 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
37859 instead. Impose minima and maxima for all *Period options; impose
37860 even tighter maxima for fetching if we are a caching dirserver.
37861 Clip rather than rejecting.
37862 - Fetch cached running-routers from servers that serve it (that is,
37863 authdirservers and servers running 0.0.9rc5-cvs or later.)
37866 - Accept *:706 (silc) in default exit policy.
37867 - Implement new versioning format for post 0.1.
37868 - Support "foo.nickname.exit" addresses, to let Alice request the
37869 address "foo" as viewed by exit node "nickname". Based on a patch
37871 - Make tor --version --version dump the cvs Id of every file.
37874 Changes in version 0.0.9rc4 - 2004-11-28
37875 o Bugfixes on 0.0.8.1:
37876 - Make windows sockets actually non-blocking (oops), and handle
37877 win32 socket errors better.
37879 o Bugfixes on 0.0.9rc1:
37880 - Actually catch the -USR2 signal.
37883 Changes in version 0.0.9rc3 - 2004-11-25
37884 o Bugfixes on 0.0.8.1:
37885 - Flush the log file descriptor after we print "Tor opening log file",
37886 so we don't see those messages days later.
37888 o Bugfixes on 0.0.9rc1:
37889 - Make tor-resolve work again.
37890 - Avoid infinite loop in tor-resolve if tor hangs up on it.
37891 - Fix an assert trigger for clients/servers handling resolves.
37894 Changes in version 0.0.9rc2 - 2004-11-24
37895 o Bugfixes on 0.0.9rc1:
37896 - I broke socks5 support while fixing the eof bug.
37897 - Allow unitless bandwidths and intervals; they default to bytes
37899 - New servers don't start out hibernating; they are active until
37900 they run out of bytes, so they have a better estimate of how
37901 long it takes, and so their operators can know they're working.
37904 Changes in version 0.0.9rc1 - 2004-11-23
37905 o Bugfixes on 0.0.8.1:
37906 - Finally fix a bug that's been plaguing us for a year:
37907 With high load, circuit package window was reaching 0. Whenever
37908 we got a circuit-level sendme, we were reading a lot on each
37909 socket, but only writing out a bit. So we would eventually reach
37910 eof. This would be noticed and acted on even when there were still
37911 bytes sitting in the inbuf.
37912 - When poll() is interrupted, we shouldn't believe the revents values.
37914 o Bugfixes on 0.0.9pre6:
37915 - Fix hibernate bug that caused pre6 to be broken.
37916 - Don't keep rephist info for routers that haven't had activity for
37917 24 hours. (This matters now that clients have keys, since we track
37919 - Never call close_temp_logs while validating log options.
37920 - Fix backslash-escaping on tor.sh.in and torctl.in.
37923 - Implement weekly/monthly/daily accounting: now you specify your
37924 hibernation properties by
37925 AccountingMax N bytes|KB|MB|GB|TB
37926 AccountingStart day|week|month [day] HH:MM
37927 Defaults to "month 1 0:00".
37928 - Let bandwidth and interval config options be specified as 5 bytes,
37929 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
37930 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
37931 get back to normal.)
37932 - If your requested entry or exit node has advertised bandwidth 0,
37934 - Be more greedy about filling up relay cells -- we try reading again
37935 once we've processed the stuff we read, in case enough has arrived
37936 to fill the last cell completely.
37937 - Apply NT service patch from Osamu Fujino. Still needs more work.
37940 Changes in version 0.0.9pre6 - 2004-11-15
37941 o Bugfixes on 0.0.8.1:
37942 - Fix assert failure on malformed socks4a requests.
37943 - Use identity comparison, not nickname comparison, to choose which
37944 half of circuit-ID-space each side gets to use. This is needed
37945 because sometimes we think of a router as a nickname, and sometimes
37946 as a hex ID, and we can't predict what the other side will do.
37947 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
37948 write() call will fail and we handle it there.
37949 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
37950 and smartlist_len, which are two major profiling offenders.
37952 o Bugfixes on 0.0.9pre5:
37953 - Fix a bug in read_all that was corrupting config files on windows.
37954 - When we're raising the max number of open file descriptors to
37955 'unlimited', don't log that we just raised it to '-1'.
37956 - Include event code with events, as required by control-spec.txt.
37957 - Don't give a fingerprint when clients do --list-fingerprint:
37958 it's misleading, because it will never be the same again.
37959 - Stop using strlcpy in tor_strndup, since it was slowing us
37961 - Remove warn on startup about missing cached-directory file.
37962 - Make kill -USR1 work again.
37963 - Hibernate if we start tor during the "wait for wakeup-time" phase
37964 of an accounting interval. Log our hibernation plans better.
37965 - Authoritative dirservers now also cache their directory, so they
37966 have it on start-up.
37969 - Fetch running-routers; cache running-routers; compress
37970 running-routers; serve compressed running-routers.z
37971 - Add NSI installer script contributed by J Doe.
37972 - Commit VC6 and VC7 workspace/project files.
37973 - Commit a tor.spec for making RPM files, with help from jbash.
37974 - Add contrib/torctl.in contributed by Glenn Fink.
37975 - Implement the control-spec's SAVECONF command, to write your
37976 configuration to torrc.
37977 - Get cookie authentication for the controller closer to working.
37978 - Include control-spec.txt in the tarball.
37979 - When set_conf changes our server descriptor, upload a new copy.
37980 But don't upload it too often if there are frequent changes.
37981 - Document authentication config in man page, and document signals
37983 - Clean up confusing parts of man page and torrc.sample.
37984 - Make expand_filename handle ~ and ~username.
37985 - Use autoconf to enable largefile support where necessary. Use
37986 ftello where available, since ftell can fail at 2GB.
37987 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
37988 log more informatively.
37989 - Give a slightly more useful output for "tor -h".
37990 - Refuse application socks connections to port 0.
37991 - Check clock skew for verified servers, but allow unverified
37992 servers and clients to have any clock skew.
37993 - Break DirFetchPostPeriod into:
37994 - DirFetchPeriod for fetching full directory,
37995 - StatusFetchPeriod for fetching running-routers,
37996 - DirPostPeriod for posting server descriptor,
37997 - RendPostPeriod for posting hidden service descriptors.
37998 - Make sure the hidden service descriptors are at a random offset
37999 from each other, to hinder linkability.
38002 Changes in version 0.0.9pre5 - 2004-11-09
38003 o Bugfixes on 0.0.9pre4:
38004 - Fix a seg fault in unit tests (doesn't affect main program).
38005 - Fix an assert bug where a hidden service provider would fail if
38006 the first hop of his rendezvous circuit was down.
38007 - Hidden service operators now correctly handle version 1 style
38008 INTRODUCE1 cells (nobody generates them still, so not a critical
38010 - If do_hup fails, actually notice.
38011 - Handle more errnos from accept() without closing the listener.
38012 Some OpenBSD machines were closing their listeners because
38013 they ran out of file descriptors.
38014 - Send resolve cells to exit routers that are running a new
38015 enough version of the resolve code to work right.
38016 - Better handling of winsock includes on non-MSV win32 compilers.
38017 - Some people had wrapped their tor client/server in a script
38018 that would restart it whenever it died. This did not play well
38019 with our "shut down if your version is obsolete" code. Now people
38020 don't fetch a new directory if their local cached version is
38022 - Make our autogen.sh work on ksh as well as bash.
38025 - Hibernation: New config option "AccountingMaxKB" lets you
38026 set how many KBytes per month you want to allow your server to
38027 consume. Rather than spreading those bytes out evenly over the
38028 month, we instead hibernate for some of the month and pop up
38029 at a deterministic time, work until the bytes are consumed, then
38030 hibernate again. Config option "MonthlyAccountingStart" lets you
38031 specify which day of the month your billing cycle starts on.
38032 - Control interface: a separate program can now talk to your
38033 client/server over a socket, and get/set config options, receive
38034 notifications of circuits and streams starting/finishing/dying,
38035 bandwidth used, etc. The next step is to get some GUIs working.
38036 Let us know if you want to help out. See doc/control-spec.txt .
38037 - Ship a contrib/tor-control.py as an example script to interact
38038 with the control port.
38039 - "tor --hash-password zzyxz" will output a salted password for
38040 use in authenticating to the control interface.
38041 - New log format in config:
38042 "Log minsev[-maxsev] stdout|stderr|syslog" or
38043 "Log minsev[-maxsev] file /var/foo"
38046 - DirPolicy config option, to let people reject incoming addresses
38047 from their dirserver.
38048 - "tor --list-fingerprint" will list your identity key fingerprint
38050 - Add "pass" target for RedirectExit, to make it easier to break
38051 out of a sequence of RedirectExit rules.
38052 - Clients now generate a TLS cert too, in preparation for having
38053 them act more like real nodes.
38054 - Ship src/win32/ in the tarball, so people can use it to build.
38055 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
38057 - New "router-status" line in directory, to better bind each verified
38058 nickname to its identity key.
38059 - Deprecate unofficial config option abbreviations, and abbreviations
38060 not on the command line.
38061 - Add a pure-C tor-resolve implementation.
38062 - Use getrlimit and friends to ensure we can reach MaxConn (currently
38063 1024) file descriptors.
38065 o Code security improvements, inspired by Ilja:
38066 - Replace sprintf with snprintf. (I think they were all safe, but
38068 - Replace strcpy/strncpy with strlcpy in more places.
38069 - Avoid strcat; use snprintf or strlcat instead.
38070 - snprintf wrapper with consistent (though not C99) overflow behavior.
38073 Changes in version 0.0.9pre4 - 2004-10-17
38074 o Bugfixes on 0.0.9pre3:
38075 - If the server doesn't specify an exit policy, use the real default
38076 exit policy, not reject *:*.
38077 - Ignore fascistfirewall when uploading/downloading hidden service
38078 descriptors, since we go through Tor for those; and when using
38079 an HttpProxy, since we assume it can reach them all.
38080 - When looking for an authoritative dirserver, use only the ones
38081 configured at boot. Don't bother looking in the directory.
38082 - The rest of the fix for get_default_conf_file() on older win32.
38083 - Make 'Routerfile' config option obsolete.
38086 - New 'MyFamily nick1,...' config option for a server to
38087 specify other servers that shouldn't be used in the same circuit
38088 with it. Only believed if nick1 also specifies us.
38089 - New 'NodeFamily nick1,nick2,...' config option for a client to
38090 specify nodes that it doesn't want to use in the same circuit.
38091 - New 'Redirectexit pattern address:port' config option for a
38092 server to redirect exit connections, e.g. to a local squid.
38095 Changes in version 0.0.9pre3 - 2004-10-13
38096 o Bugfixes on 0.0.8.1:
38097 - Better torrc example lines for dirbindaddress and orbindaddress.
38098 - Improved bounds checking on parsed ints (e.g. config options and
38099 the ones we find in directories.)
38100 - Better handling of size_t vs int, so we're more robust on 64
38102 - Fix the rest of the bug where a newly started OR would appear
38103 as unverified even after we've added his fingerprint and hupped
38105 - Fix a bug from 0.0.7: when read() failed on a stream, we would
38106 close it without sending back an end. So 'connection refused'
38107 would simply be ignored and the user would get no response.
38109 o Bugfixes on 0.0.9pre2:
38110 - Serving the cached-on-disk directory to people is bad. We now
38111 provide no directory until we've fetched a fresh one.
38112 - Workaround for bug on windows where cached-directories get crlf
38114 - Make get_default_conf_file() work on older windows too.
38115 - If we write a *:* exit policy line in the descriptor, don't write
38116 any more exit policy lines.
38119 - Use only 0.0.9pre1 and later servers for resolve cells.
38120 - Make the dirservers file obsolete.
38121 - Include a dir-signing-key token in directories to tell the
38122 parsing entity which key is being used to sign.
38123 - Remove the built-in bulky default dirservers string.
38124 - New config option "Dirserver %s:%d [fingerprint]", which can be
38125 repeated as many times as needed. If no dirservers specified,
38126 default to moria1,moria2,tor26.
38127 - Make moria2 advertise a dirport of 80, so people behind firewalls
38128 will be able to get a directory.
38129 - Http proxy support
38130 - Dirservers translate requests for http://%s:%d/x to /x
38131 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
38132 be routed through this host.
38133 - Clients ask for /tor/x rather than /x for new enough dirservers.
38134 This way we can one day coexist peacefully with apache.
38135 - Clients specify a "Host: %s%d" http header, to be compatible
38136 with more proxies, and so running squid on an exit node can work.
38139 Changes in version 0.0.8.1 - 2004-10-13
38141 - Fix a seg fault that can be triggered remotely for Tor
38142 clients/servers with an open dirport.
38143 - Fix a rare assert trigger, where routerinfos for entries in
38144 our cpath would expire while we're building the path.
38145 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38146 - Fix a rare seg fault for people running hidden services on
38147 intermittent connections.
38148 - Fix a bug in parsing opt keywords with objects.
38149 - Fix a stale pointer assert bug when a stream detaches and
38151 - Fix a string format vulnerability (probably not exploitable)
38152 in reporting stats locally.
38153 - Fix an assert trigger: sometimes launching circuits can fail
38154 immediately, e.g. because too many circuits have failed recently.
38155 - Fix a compile warning on 64 bit platforms.
38158 Changes in version 0.0.9pre2 - 2004-10-03
38160 - Make fetching a cached directory work for 64-bit platforms too.
38161 - Make zlib.h a required header, not an optional header.
38164 Changes in version 0.0.9pre1 - 2004-10-01
38166 - Stop using separate defaults for no-config-file and
38167 empty-config-file. Now you have to explicitly turn off SocksPort,
38168 if you don't want it open.
38169 - Fix a bug in OutboundBindAddress so it (hopefully) works.
38170 - Improve man page to mention more of the 0.0.8 features.
38171 - Fix a rare seg fault for people running hidden services on
38172 intermittent connections.
38173 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
38175 - Fix more dns related bugs: send back resolve_failed and end cells
38176 more reliably when the resolve fails, rather than closing the
38177 circuit and then trying to send the cell. Also attach dummy resolve
38178 connections to a circuit *before* calling dns_resolve(), to fix
38179 a bug where cached answers would never be sent in RESOLVED cells.
38180 - When we run out of disk space, or other log writing error, don't
38181 crash. Just stop logging to that log and continue.
38182 - We were starting to daemonize before we opened our logs, so if
38183 there were any problems opening logs, we would complain to stderr,
38184 which wouldn't work, and then mysteriously exit.
38185 - Fix a rare bug where sometimes a verified OR would connect to us
38186 before he'd uploaded his descriptor, which would cause us to
38187 assign conn->nickname as though he's unverified. Now we look through
38188 the fingerprint list to see if he's there.
38189 - Fix a rare assert trigger, where routerinfos for entries in
38190 our cpath would expire while we're building the path.
38193 - Clients can ask dirservers for /dir.z to get a compressed version
38194 of the directory. Only works for servers running 0.0.9, of course.
38195 - Make clients cache directories and use them to seed their router
38196 lists at startup. This means clients have a datadir again.
38197 - Configuration infrastructure support for warning on obsolete
38199 - Respond to content-encoding headers by trying to uncompress as
38201 - Reply with a deflated directory when a client asks for "dir.z".
38202 We could use allow-encodings instead, but allow-encodings isn't
38203 specified in HTTP 1.0.
38204 - Raise the max dns workers from 50 to 100.
38205 - Discourage people from setting their dirfetchpostperiod more often
38206 than once per minute.
38207 - Protect dirservers from overzealous descriptor uploading -- wait
38208 10 seconds after directory gets dirty, before regenerating.
38211 Changes in version 0.0.8 - 2004-08-25
38212 o Port it to SunOS 5.9 / Athena
38215 Changes in version 0.0.8rc2 - 2004-08-20
38216 o Make it compile on cygwin again.
38217 o When picking unverified routers, skip those with low uptime and/or
38218 low bandwidth, depending on what properties you care about.
38221 Changes in version 0.0.8rc1 - 2004-08-18
38222 o Changes from 0.0.7.3:
38224 - Fix assert triggers: if the other side returns an address 0.0.0.0,
38225 don't put it into the client dns cache.
38226 - If a begin failed due to exit policy, but we believe the IP address
38227 should have been allowed, switch that router to exitpolicy reject *:*
38228 until we get our next directory.
38230 - Clients choose nodes proportional to advertised bandwidth.
38231 - Avoid using nodes with low uptime as introduction points.
38232 - Handle servers with dynamic IP addresses: don't replace
38233 options->Address with the resolved one at startup, and
38234 detect our address right before we make a routerinfo each time.
38235 - 'FascistFirewall' option to pick dirservers and ORs on specific
38236 ports; plus 'FirewallPorts' config option to tell FascistFirewall
38237 which ports are open. (Defaults to 80,443)
38238 - Be more aggressive about trying to make circuits when the network
38239 has changed (e.g. when you unsuspend your laptop).
38240 - Check for time skew on http headers; report date in response to
38242 - If the entrynode config line has only one node, don't pick it as
38244 - Add strict{entry|exit}nodes config options. If set to 1, then
38245 we refuse to build circuits that don't include the specified entry
38247 - OutboundBindAddress config option, to bind to a specific
38248 IP address for outgoing connect()s.
38249 - End truncated log entries (e.g. directories) with "[truncated]".
38251 o Patches to 0.0.8preX:
38253 - Patches to compile and run on win32 again (maybe)?
38254 - Fix crash when looking for ~/.torrc with no $HOME set.
38255 - Fix a race bug in the unit tests.
38256 - Handle verified/unverified name collisions better when new
38257 routerinfo's arrive in a directory.
38258 - Sometimes routers were getting entered into the stats before
38259 we'd assigned their identity_digest. Oops.
38260 - Only pick and establish intro points after we've gotten a
38263 - AllowUnverifiedNodes config option to let circuits choose no-name
38264 routers in entry,middle,exit,introduction,rendezvous positions.
38265 Allow middle and rendezvous positions by default.
38266 - Add a man page for tor-resolve.
38269 Changes in version 0.0.7.3 - 2004-08-12
38270 o Stop dnsworkers from triggering an assert failure when you
38271 ask them to resolve the host "".
38274 Changes in version 0.0.8pre3 - 2004-08-09
38275 o Changes from 0.0.7.2:
38276 - Allow multiple ORs with same nickname in routerlist -- now when
38277 people give us one identity key for a nickname, then later
38278 another, we don't constantly complain until the first expires.
38279 - Remember used bandwidth (both in and out), and publish 15-minute
38280 snapshots for the past day into our descriptor.
38281 - You can now fetch $DIRURL/running-routers to get just the
38282 running-routers line, not the whole descriptor list. (But
38283 clients don't use this yet.)
38284 - When people mistakenly use Tor as an http proxy, point them
38285 at the tor-doc.html rather than the INSTALL.
38286 - Remove our mostly unused -- and broken -- hex_encode()
38287 function. Use base16_encode() instead. (Thanks to Timo Lindfors
38288 for pointing out this bug.)
38289 - Rotate onion keys every 12 hours, not every 2 hours, so we have
38290 fewer problems with people using the wrong key.
38291 - Change the default exit policy to reject the default edonkey,
38292 kazaa, gnutella ports.
38293 - Add replace_file() to util.[ch] to handle win32's rename().
38295 o Changes from 0.0.8preX:
38296 - Fix two bugs in saving onion keys to disk when rotating, so
38297 hopefully we'll get fewer people using old onion keys.
38298 - Fix an assert error that was making SocksPolicy not work.
38299 - Be willing to expire routers that have an open dirport -- it's
38300 just the authoritative dirservers we want to not forget.
38301 - Reject tor-resolve requests for .onion addresses early, so we
38302 don't build a whole rendezvous circuit and then fail.
38303 - When you're warning a server that he's unverified, don't cry
38304 wolf unpredictably.
38305 - Fix a race condition: don't try to extend onto a connection
38306 that's still handshaking.
38307 - For servers in clique mode, require the conn to be open before
38308 you'll choose it for your path.
38309 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
38310 end relay cell, etc.
38311 - Measure bandwidth capacity over the last 24 hours, not just 12
38312 - Bugfix: authoritative dirservers were making and signing a new
38313 directory for each client, rather than reusing the cached one.
38316 Changes in version 0.0.8pre2 - 2004-08-04
38317 o Changes from 0.0.7.2:
38319 - Check directory signature _before_ you decide whether you're
38320 you're running an obsolete version and should exit.
38321 - Check directory signature _before_ you parse the running-routers
38322 list to decide who's running or verified.
38323 - Bugfixes and features:
38324 - Check return value of fclose while writing to disk, so we don't
38325 end up with broken files when servers run out of disk space.
38326 - Log a warning if the user uses an unsafe socks variant, so people
38327 are more likely to learn about privoxy or socat.
38328 - Dirservers now include RFC1123-style dates in the HTTP headers,
38329 which one day we will use to better detect clock skew.
38331 o Changes from 0.0.8pre1:
38332 - Make it compile without warnings again on win32.
38333 - Log a warning if you're running an unverified server, to let you
38334 know you might want to get it verified.
38335 - Only pick a default nickname if you plan to be a server.
38338 Changes in version 0.0.8pre1 - 2004-07-23
38340 - Made our unit tests compile again on OpenBSD 3.5, and tor
38341 itself compile again on OpenBSD on a sparc64.
38342 - We were neglecting milliseconds when logging on win32, so
38343 everything appeared to happen at the beginning of each second.
38345 o Protocol changes:
38346 - 'Extend' relay cell payloads now include the digest of the
38347 intended next hop's identity key. Now we can verify that we're
38348 extending to the right router, and also extend to routers we
38349 hadn't heard of before.
38352 - Tor nodes can now act as relays (with an advertised ORPort)
38353 without being manually verified by the dirserver operators.
38354 - Uploaded descriptors of unverified routers are now accepted
38355 by the dirservers, and included in the directory.
38356 - Verified routers are listed by nickname in the running-routers
38357 list; unverified routers are listed as "$<fingerprint>".
38358 - We now use hash-of-identity-key in most places rather than
38359 nickname or addr:port, for improved security/flexibility.
38360 - To avoid Sybil attacks, paths still use only verified servers.
38361 But now we have a chance to play around with hybrid approaches.
38362 - Nodes track bandwidth usage to estimate capacity (not used yet).
38363 - ClientOnly option for nodes that never want to become servers.
38364 - Directory caching.
38365 - "AuthoritativeDir 1" option for the official dirservers.
38366 - Now other nodes (clients and servers) will cache the latest
38367 directory they've pulled down.
38368 - They can enable their DirPort to serve it to others.
38369 - Clients will pull down a directory from any node with an open
38370 DirPort, and check the signature/timestamp correctly.
38371 - Authoritative dirservers now fetch directories from other
38372 authdirservers, to stay better synced.
38373 - Running-routers list tells who's down also, along with noting
38374 if they're verified (listed by nickname) or unverified (listed
38376 - Allow dirservers to serve running-router list separately.
38377 This isn't used yet.
38378 - ORs connect-on-demand to other ORs
38379 - If you get an extend cell to an OR you're not connected to,
38380 connect, handshake, and forward the create cell.
38381 - The authoritative dirservers stay connected to everybody,
38382 and everybody stays connected to 0.0.7 servers, but otherwise
38383 clients/servers expire unused connections after 5 minutes.
38384 - When servers get a sigint, they delay 30 seconds (refusing new
38385 connections) then exit. A second sigint causes immediate exit.
38386 - File and name management:
38387 - Look for .torrc if no CONFDIR "torrc" is found.
38388 - If no datadir is defined, then choose, make, and secure ~/.tor
38390 - If torrc not found, exitpolicy reject *:*.
38391 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
38392 - If no nickname is defined, derive default from hostname.
38393 - Rename secret key files, e.g. identity.key -> secret_id_key,
38394 to discourage people from mailing their identity key to tor-ops.
38395 - Refuse to build a circuit before the directory has arrived --
38396 it won't work anyway, since you won't know the right onion keys
38398 - Try other dirservers immediately if the one you try is down. This
38399 should tolerate down dirservers better now.
38400 - Parse tor version numbers so we can do an is-newer-than check
38401 rather than an is-in-the-list check.
38402 - New socks command 'resolve', to let us shim gethostbyname()
38404 - A 'tor_resolve' script to access the socks resolve functionality.
38405 - A new socks-extensions.txt doc file to describe our
38406 interpretation and extensions to the socks protocols.
38407 - Add a ContactInfo option, which gets published in descriptor.
38408 - Publish OR uptime in descriptor (and thus in directory) too.
38409 - Write tor version at the top of each log file
38410 - New docs in the tarball:
38412 - Document that you should proxy your SSL traffic too.
38415 Changes in version 0.0.7.2 - 2004-07-07
38416 o A better fix for the 0.0.0.0 problem, that will hopefully
38417 eliminate the remaining related assertion failures.
38420 Changes in version 0.0.7.1 - 2004-07-04
38421 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
38422 since internally we use 0.0.0.0 to signify "not yet resolved".
38425 Changes in version 0.0.7 - 2004-06-07
38426 o Updated the man page to reflect the new features.
38429 Changes in version 0.0.7rc2 - 2004-06-06
38430 o Changes from 0.0.7rc1:
38431 - Make it build on Win32 again.
38432 o Changes from 0.0.6.2:
38433 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
38437 Changes in version 0.0.7rc1 - 2004-06-02
38439 - On sighup, we were adding another log without removing the first
38440 one. So log messages would get duplicated n times for n sighups.
38441 - Several cases of using a connection after we'd freed it. The
38442 problem was that connections that are pending resolve are in both
38443 the pending_resolve tree, and also the circuit's resolving_streams
38444 list. When you want to remove one, you must remove it from both.
38445 - Fix a double-mark-for-close where an end cell arrived for a
38446 resolving stream, and then the resolve failed.
38447 - Check directory signatures based on name of signer, not on whom
38448 we got the directory from. This will let us cache directories more
38451 - Crank up some of our constants to handle more users.
38454 Changes in version 0.0.7pre1 - 2004-06-02
38455 o Fixes for crashes and other obnoxious bugs:
38456 - Fix an epipe bug: sometimes when directory connections failed
38457 to connect, we would give them a chance to flush before closing
38459 - When we detached from a circuit because of resolvefailed, we
38460 would immediately try the same circuit twice more, and then
38461 give up on the resolve thinking we'd tried three different
38463 - Limit the number of intro circuits we'll attempt to build for a
38464 hidden service per 15-minute period.
38465 - Check recommended-software string *early*, before actually parsing
38466 the directory. Thus we can detect an obsolete version and exit,
38467 even if the new directory format doesn't parse.
38468 o Fixes for security bugs:
38469 - Remember which nodes are dirservers when you startup, and if a
38470 random OR enables his dirport, don't automatically assume he's
38471 a trusted dirserver.
38473 - Directory connections were asking the wrong poll socket to
38474 start writing, and not asking themselves to start writing.
38475 - When we detached from a circuit because we sent a begin but
38476 didn't get a connected, we would use it again the first time;
38477 but after that we would correctly switch to a different one.
38478 - Stop warning when the first onion decrypt attempt fails; they
38479 will sometimes legitimately fail now that we rotate keys.
38480 - Override unaligned-access-ok check when $host_cpu is ia64 or
38481 arm. Apparently they allow it but the kernel whines.
38482 - Dirservers try to reconnect periodically too, in case connections
38484 - Fix some memory leaks in directory servers.
38485 - Allow backslash in Win32 filenames.
38486 - Made Tor build complain-free on FreeBSD, hopefully without
38487 breaking other BSD builds. We'll see.
38489 - Doxygen markup on all functions and global variables.
38490 - Make directory functions update routerlist, not replace it. So
38491 now directory disagreements are not so critical a problem.
38492 - Remove the upper limit on number of descriptors in a dirserver's
38493 directory (not that we were anywhere close).
38494 - Allow multiple logfiles at different severity ranges.
38495 - Allow *BindAddress to specify ":port" rather than setting *Port
38496 separately. Allow multiple instances of each BindAddress config
38497 option, so you can bind to multiple interfaces if you want.
38498 - Allow multiple exit policy lines, which are processed in order.
38499 Now we don't need that huge line with all the commas in it.
38500 - Enable accept/reject policies on SOCKS connections, so you can bind
38501 to 0.0.0.0 but still control who can use your OP.
38504 Changes in version 0.0.6.2 - 2004-05-16
38505 o Our integrity-checking digest was checking only the most recent cell,
38506 not the previous cells like we'd thought.
38507 Thanks to Stefan Mark for finding the flaw!
38510 Changes in version 0.0.6.1 - 2004-05-06
38511 o Fix two bugs in our AES counter-mode implementation (this affected
38512 onion-level stream encryption, but not TLS-level). It turns
38513 out we were doing something much more akin to a 16-character
38514 polyalphabetic cipher. Oops.
38515 Thanks to Stefan Mark for finding the flaw!
38516 o Retire moria3 as a directory server, and add tor26 as a directory
38520 Changes in version 0.0.6 - 2004-05-02
38521 [version bump only]
38524 Changes in version 0.0.6rc4 - 2004-05-01
38525 o Update the built-in dirservers list to use the new directory format
38526 o Fix a rare seg fault: if a node offering a hidden service attempts
38527 to build a circuit to Alice's rendezvous point and fails before it
38528 reaches the last hop, it retries with a different circuit, but
38530 o Handle windows socket errors correctly.
38533 Changes in version 0.0.6rc3 - 2004-04-28
38534 o Don't expire non-general excess circuits (if we had enough
38535 circuits open, we were expiring rendezvous circuits -- even
38536 when they had a stream attached. oops.)
38537 o Fetch randomness from /dev/urandom better (not via fopen/fread)
38538 o Better debugging for tls errors
38539 o Some versions of openssl have an SSL_pending function that erroneously
38540 returns bytes when there is a non-application record pending.
38541 o Set Content-Type on the directory and hidserv descriptor.
38542 o Remove IVs from cipher code, since AES-ctr has none.
38543 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
38544 o We were using an array of length zero in a few places.
38545 o win32's gethostbyname can't resolve an IP to an IP.
38546 o win32's close can't close a socket.
38549 Changes in version 0.0.6rc2 - 2004-04-26
38550 o Fix a bug where we were closing tls connections intermittently.
38551 It turns out openssl keeps its errors around -- so if an error
38552 happens, and you don't ask about it, and then another openssl
38553 operation happens and succeeds, and you ask if there was an error,
38554 it tells you about the first error. Fun fun.
38555 o Fix a bug that's been lurking since 27 may 03 (!)
38556 When passing back a destroy cell, we would use the wrong circ id.
38557 'Mostly harmless', but still worth fixing.
38558 o Since we don't support truncateds much, don't bother sending them;
38559 just close the circ.
38560 o check for <machine/limits.h> so we build on NetBSD again (I hope).
38561 o don't crash if a conn that sent a begin has suddenly lost its circuit
38562 (this was quite rare).
38565 Changes in version 0.0.6rc1 - 2004-04-25
38566 o We now rotate link (tls context) keys and onion keys.
38567 o CREATE cells now include oaep padding, so you can tell
38568 if you decrypted them correctly.
38569 o Add bandwidthburst to server descriptor.
38570 o Directories now say which dirserver signed them.
38571 o Use a tor_assert macro that logs failed assertions too.
38574 Changes in version 0.0.6pre5 - 2004-04-18
38575 o changes from 0.0.6pre4:
38576 - make tor build on broken freebsd 5.2 installs
38577 - fix a failed assert when you try an intro point, get a nack, and try
38578 a second one and it works.
38579 - when alice uses a port that the hidden service doesn't accept,
38580 it now sends back an end cell (denied by exit policy). otherwise
38581 alice would just have to wait to time out.
38582 - fix another rare bug: when we had tried all the intro
38583 points for a hidden service, we fetched the descriptor
38584 again, but we left our introcirc thinking it had already
38585 sent an intro, so it kept waiting for a response...
38586 - bugfix: when you sleep your hidden-service laptop, as soon
38587 as it wakes up it tries to upload a service descriptor, but
38588 socketpair fails for some reason (localhost not up yet?).
38589 now we simply give up on that upload, and we'll try again later.
38590 i'd still like to find the bug though.
38591 - if an intro circ waiting for an ack dies before getting one, then
38593 - we were reusing stale service descriptors and refetching usable
38597 Changes in version 0.0.6pre4 - 2004-04-14
38598 o changes from 0.0.6pre3:
38599 - when bob fails to connect to the rendezvous point, and his
38600 circ didn't fail because of the rendezvous point itself, then
38601 he retries a couple of times
38602 - we expire introduction and rendezvous circs more thoroughly
38603 (sometimes they were hanging around forever)
38604 - we expire unattached rendezvous streams that have been around
38605 too long (they were sticking around forever).
38606 - fix a measly fencepost error that was crashing everybody with
38610 Changes in version 0.0.6pre3 - 2004-04-14
38611 o changes from 0.0.6pre2:
38612 - make hup work again
38613 - fix some memory leaks for dirservers
38614 - allow more skew in rendezvous descriptor timestamps, to help
38615 handle people like blanu who don't know what time it is
38616 - normal circs are 3 hops, but some rend/intro circs are 4, if
38617 the initiator doesn't get to choose the last hop
38618 - send acks for introductions, so alice can know whether to try
38620 - bob publishes intro points more correctly
38621 o changes from 0.0.5:
38622 - fix an assert trigger that's been plaguing us since the days
38623 of 0.0.2prexx (thanks weasel!)
38624 - retry stream correctly when we fail to connect because of
38625 exit-policy-reject (should try another) or can't-resolve-address
38626 (also should try another, because dns on random internet servers
38628 - when we hup a dirserver and we've *removed* a server from the
38629 approved-routers list, now we remove that server from the
38630 in-memory directories too
38633 Changes in version 0.0.6pre2 - 2004-04-08
38634 o We fixed our base32 implementation. Now it works on all architectures.
38637 Changes in version 0.0.6pre1 - 2004-04-08
38639 - Hidden services and rendezvous points are implemented. Go to
38640 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
38641 hidden services. (This only works via a socks4a proxy such as
38642 Privoxy, and currently it's quite slow.)
38645 Changes in version 0.0.5 - 2004-03-30
38646 [version bump only]
38649 Changes in version 0.0.5rc3 - 2004-03-29
38650 o Install torrc as torrc.sample -- we no longer clobber your
38652 o Re-enable recommendedversion checking (we broke it in rc2, oops)
38653 o Add in a 'notice' log level for things the operator should hear
38654 but that aren't warnings
38657 Changes in version 0.0.5rc2 - 2004-03-29
38658 o Hold socks connection open until reply is flushed (if possible)
38659 o Make exit nodes resolve IPs to IPs immediately, rather than asking
38660 the dns farm to do it.
38661 o Fix c99 aliasing warnings in rephist.c
38662 o Don't include server descriptors that are older than 24 hours in the
38664 o Give socks 'reject' replies their whole 15s to attempt to flush,
38665 rather than seeing the 60s timeout and assuming the flush had failed.
38666 o Clean automake droppings from the cvs repository
38669 Changes in version 0.0.5rc1 - 2004-03-28
38670 o Fix mangled-state bug in directory fetching (was causing sigpipes).
38671 o Only build circuits after we've fetched the directory: clients were
38672 using only the directory servers before they'd fetched a directory.
38673 This also means longer startup time; so it goes.
38674 o Fix an assert trigger where an OP would fail to handshake, and we'd
38675 expect it to have a nickname.
38676 o Work around a tsocks bug: do a socks reject when AP connection dies
38677 early, else tsocks goes into an infinite loop.
38680 Changes in version 0.0.4 - 2004-03-26
38681 o When connecting to a dirserver or OR and the network is down,
38685 Changes in version 0.0.3 - 2004-03-26
38686 o Warn and fail if server chose a nickname with illegal characters
38687 o Port to Solaris and Sparc:
38688 - include missing header fcntl.h
38689 - have autoconf find -lsocket -lnsl automatically
38690 - deal with hardware word alignment
38691 - make uname() work (solaris has a different return convention)
38692 - switch from using signal() to sigaction()
38693 o Preliminary work on reputation system:
38694 - Keep statistics on success/fail of connect attempts; they're published
38695 by kill -USR1 currently.
38696 - Add a RunTesting option to try to learn link state by creating test
38697 circuits, even when SocksPort is off.
38698 - Remove unused open circuits when there are too many.
38701 Changes in version 0.0.2 - 2004-03-19
38702 - Include strlcpy and strlcat for safer string ops
38703 - define INADDR_NONE so we compile (but still not run) on solaris
38706 Changes in version 0.0.2pre27 - 2004-03-14
38708 - Allow internal tor networks (we were rejecting internal IPs,
38709 now we allow them if they're set explicitly).
38710 - And fix a few endian issues.
38713 Changes in version 0.0.2pre26 - 2004-03-14
38715 - If a stream times out after 15s without a connected cell, don't
38716 try that circuit again: try a new one.
38717 - Retry streams at most 4 times. Then give up.
38718 - When a dirserver gets a descriptor from an unknown router, it
38719 logs its fingerprint (so the dirserver operator can choose to
38720 accept it even without mail from the server operator).
38721 - Inform unapproved servers when we reject their descriptors.
38722 - Make tor build on Windows again. It works as a client, who knows
38724 - Clearer instructions in the torrc for how to set up a server.
38725 - Be more efficient about reading fd's when our global token bucket
38726 (used for rate limiting) becomes empty.
38728 - Stop asserting that computers always go forward in time. It's
38730 - When we sent a cell (e.g. destroy) and then marked an OR connection
38731 expired, we might close it before finishing a flush if the other
38732 side isn't reading right then.
38733 - Don't allow dirservers to start if they haven't defined
38734 RecommendedVersions
38735 - We were caching transient dns failures. Oops.
38736 - Prevent servers from publishing an internal IP as their address.
38737 - Address a strcat vulnerability in circuit.c
38740 Changes in version 0.0.2pre25 - 2004-03-04
38742 - Put the OR's IP in its router descriptor, not its fqdn. That way
38743 we'll stop being stalled by gethostbyname for nodes with flaky dns,
38746 - If the user typed in an address that didn't resolve, the server
38750 Changes in version 0.0.2pre24 - 2004-03-03
38752 - Fix an assertion failure in dns.c, where we were trying to dequeue
38753 a pending dns resolve even if it wasn't pending
38754 - Fix a spurious socks5 warning about still trying to write after the
38755 connection is finished.
38756 - Hold certain marked_for_close connections open until they're finished
38757 flushing, rather than losing bytes by closing them too early.
38758 - Correctly report the reason for ending a stream
38759 - Remove some duplicate calls to connection_mark_for_close
38760 - Put switch_id and start_daemon earlier in the boot sequence, so it
38761 will actually try to chdir() to options.DataDirectory
38762 - Make 'make test' exit(1) if a test fails; fix some unit tests
38763 - Make tor fail when you use a config option it doesn't know about,
38764 rather than warn and continue.
38765 - Make --version work
38766 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
38769 Changes in version 0.0.2pre23 - 2004-02-29
38771 - Print a statement when the first circ is finished, so the user
38772 knows it's working.
38773 - If a relay cell is unrecognized at the end of the circuit,
38774 send back a destroy. (So attacks to mutate cells are more
38776 - New config option 'excludenodes' to avoid certain nodes for circuits.
38777 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
38778 so you can collect coredumps there.
38780 - Fix a bug in tls flushing where sometimes data got wedged and
38781 didn't flush until more data got sent. Hopefully this bug was
38782 a big factor in the random delays we were seeing.
38783 - Make 'connected' cells include the resolved IP, so the client
38784 dns cache actually gets populated.
38785 - Disallow changing from ORPort=0 to ORPort>0 on hup.
38786 - When we time-out on a stream and detach from the circuit, send an
38787 end cell down it first.
38788 - Only warn about an unknown router (in exitnodes, entrynodes,
38789 excludenodes) after we've fetched a directory.
38792 Changes in version 0.0.2pre22 - 2004-02-26
38794 - Servers publish less revealing uname information in descriptors.
38795 - More memory tracking and assertions, to crash more usefully when
38797 - If the default torrc isn't there, just use some default defaults.
38798 Plus provide an internal dirservers file if they don't have one.
38799 - When the user tries to use Tor as an http proxy, give them an http
38800 501 failure explaining that we're a socks proxy.
38801 - Dump a new router.desc on hup, to help confused people who change
38802 their exit policies and then wonder why router.desc doesn't reflect
38804 - Clean up the generic tor.sh init script that we ship with.
38806 - If the exit stream is pending on the resolve, and a destroy arrives,
38807 then the stream wasn't getting removed from the pending list. I
38808 think this was the one causing recent server crashes.
38809 - Use a more robust poll on OSX 10.3, since their poll is flaky.
38810 - When it couldn't resolve any dirservers, it was useless from then on.
38811 Now it reloads the RouterFile (or default dirservers) if it has no
38813 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
38814 many users don't even *have* a /usr/local/sbin/.
38817 Changes in version 0.0.2pre21 - 2004-02-18
38819 - There's a ChangeLog file that actually reflects the changelog.
38820 - There's a 'torify' wrapper script, with an accompanying
38821 tor-tsocks.conf, that simplifies the process of using tsocks for
38822 tor. It even has a man page.
38823 - The tor binary gets installed to sbin rather than bin now.
38824 - Retry streams where the connected cell hasn't arrived in 15 seconds
38825 - Clean up exit policy handling -- get the default out of the torrc,
38826 so we can update it without forcing each server operator to fix
38828 - Allow imaps and pop3s in default exit policy
38830 - Prevent picking middleman nodes as the last node in the circuit
38833 Changes in version 0.0.2pre20 - 2004-01-30
38835 - We now have a deb package, and it's in debian unstable. Go to
38836 it, apt-getters. :)
38837 - I've split the TotalBandwidth option into BandwidthRate (how many
38838 bytes per second you want to allow, long-term) and
38839 BandwidthBurst (how many bytes you will allow at once before the cap
38840 kicks in). This better token bucket approach lets you, say, set
38841 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
38842 performance while not exceeding your monthly bandwidth quota.
38843 - Push out a tls record's worth of data once you've got it, rather
38844 than waiting until you've read everything waiting to be read. This
38845 may improve performance by pipelining better. We'll see.
38846 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
38847 from failed circuits (if they haven't been connected yet) and attach
38849 - Expire old streams that haven't managed to connect. Some day we'll
38850 have them reattach to new circuits instead.
38853 - Fix several memory leaks that were causing servers to become bloated
38855 - Fix a few very rare assert triggers. A few more remain.
38856 - Setuid to User _before_ complaining about running as root.
38859 Changes in version 0.0.2pre19 - 2004-01-07
38861 - Fix deadlock condition in dns farm. We were telling a child to die by
38862 closing the parent's file descriptor to him. But newer children were
38863 inheriting the open file descriptor from the parent, and since they
38864 weren't closing it, the socket never closed, so the child never read
38865 eof, so he never knew to exit. Similarly, dns workers were holding
38866 open other sockets, leading to all sorts of chaos.
38867 - New cleaner daemon() code for forking and backgrounding.
38868 - If you log to a file, it now prints an entry at the top of the
38869 logfile so you know it's working.
38870 - The onionskin challenge length was 30 bytes longer than necessary.
38871 - Started to patch up the spec so it's not quite so out of date.
38874 Changes in version 0.0.2pre18 - 2004-01-02
38876 - Fix endian issues with the 'integrity' field in the relay header.
38877 - Fix a potential bug where connections in state
38878 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
38881 Changes in version 0.0.2pre17 - 2003-12-30
38883 - Made --debuglogfile (or any second log file, actually) work.
38884 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
38885 adversary could force us into an infinite loop.
38888 - Each onionskin handshake now includes a hash of the computed key,
38889 to prove the server's identity and help perfect forward secrecy.
38890 - Changed cell size from 256 to 512 bytes (working toward compatibility
38892 - Changed cell length to 2 bytes, and moved it to the relay header.
38893 - Implemented end-to-end integrity checking for the payloads of
38895 - Separated streamid from 'recognized' (otherwise circuits will get
38896 messed up when we try to have streams exit from the middle). We
38897 use the integrity-checking to confirm that a cell is addressed to
38899 - Randomize the initial circid and streamid values, so an adversary who
38900 breaks into a node can't learn how many circuits or streams have
38904 Changes in version 0.0.2pre16 - 2003-12-14
38906 - Fixed a bug that made HUP trigger an assert
38907 - Fixed a bug where a circuit that immediately failed wasn't being
38908 counted as a failed circuit in counting retries.
38911 - Now we close the circuit when we get a truncated cell: otherwise we're
38912 open to an anonymity attack where a bad node in the path truncates
38913 the circuit and then we open streams at him.
38914 - Add port ranges to exit policies
38915 - Add a conservative default exit policy
38916 - Warn if you're running tor as root
38917 - on HUP, retry OR connections and close/rebind listeners
38918 - options.EntryNodes: try these nodes first when picking the first node
38919 - options.ExitNodes: if your best choices happen to include any of
38920 your preferred exit nodes, you choose among just those preferred
38922 - options.ExcludedNodes: nodes that are never picked in path building
38925 Changes in version 0.0.2pre15 - 2003-12-03
38926 o Robustness and bugfixes:
38927 - Sometimes clients would cache incorrect DNS resolves, which would
38928 really screw things up.
38929 - An OP that goes offline would slowly leak all its sockets and stop
38931 - A wide variety of bugfixes in exit node selection, exit policy
38932 handling, and processing pending streams when a new circuit is
38934 - Pick nodes for a path only from those the directory says are up
38935 - Choose randomly from all running dirservers, not always the first one
38936 - Increase allowed http header size for directory fetch.
38937 - Stop writing to stderr (if we're daemonized it will be closed).
38938 - Enable -g always, so cores will be more useful to me.
38939 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
38942 - Wrote a man page. It lists commonly used options.
38945 - Change default loglevel to warn.
38946 - Make PidFile default to null rather than littering in your CWD.
38947 - OnionRouter config option is now obsolete. Instead it just checks
38949 - Moved to a single unified torrc file for both clients and servers.
38952 Changes in version 0.0.2pre14 - 2003-11-29
38953 o Robustness and bugfixes:
38954 - Force the admin to make the DataDirectory himself
38955 - to get ownership/permissions right
38956 - so clients no longer make a DataDirectory and then never use it
38957 - fix bug where a client who was offline for 45 minutes would never
38958 pull down a directory again
38959 - fix (or at least hide really well) the dns assert bug that was
38960 causing server crashes
38961 - warnings and improved robustness wrt clockskew for certs
38962 - use the native daemon(3) to daemonize, when available
38963 - exit if bind() fails
38964 - exit if neither socksport nor orport is defined
38965 - include our own tor_timegm (Win32 doesn't have its own)
38966 - bugfix for win32 with lots of connections
38967 - fix minor bias in PRNG
38968 - make dirserver more robust to corrupt cached directory
38971 - Wrote the design document (woo)
38973 o Circuit building and exit policies:
38974 - Circuits no longer try to use nodes that the directory has told them
38976 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
38977 bitcounts (18.0.0.0/8).
38978 - Make AP connections standby for a circuit if no suitable circuit
38979 exists, rather than failing
38980 - Circuits choose exit node based on addr/port, exit policies, and
38981 which AP connections are standing by
38982 - Bump min pathlen from 2 to 3
38983 - Relay end cells have a payload to describe why the stream ended.
38984 - If the stream failed because of exit policy, try again with a new
38986 - Clients have a dns cache to remember resolved addresses.
38987 - Notice more quickly when we have no working circuits
38990 - APPort is now called SocksPort
38991 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
38993 - RecommendedVersions is now a config variable rather than
38994 hardcoded (for dirservers)
38995 - Reloads config on HUP
38996 - Usage info on -h or --help
38997 - If you set User and Group config vars, it'll setu/gid to them.
39000 Changes in version 0.0.2pre13 - 2003-10-19
39001 o General stability:
39002 - SSL_write no longer fails when it returns WANTWRITE and the number
39003 of bytes in the buf has changed by the next SSL_write call.
39004 - Fix segfault fetching directory when network is down
39005 - Fix a variety of minor memory leaks
39006 - Dirservers reload the fingerprints file on HUP, so I don't have
39007 to take down the network when I approve a new router
39008 - Default server config file has explicit Address line to specify fqdn
39011 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
39012 - Make listener connections not ever alloc bufs
39014 o Autoconf improvements:
39015 - don't clobber an external CFLAGS in ./configure
39016 - Make install now works
39017 - create var/lib/tor on make install
39018 - autocreate a tor.sh initscript to help distribs
39019 - autocreate the torrc and sample-server-torrc with correct paths
39021 o Log files and Daemonizing now work:
39022 - If --DebugLogFile is specified, log to it at -l debug
39023 - If --LogFile is specified, use it instead of commandline
39024 - If --RunAsDaemon is set, tor forks and backgrounds on startup