1 Changes in version 0.4.7.1-alpha - 2021-09-17
2 This version is the first alpha release of the 0.4.7.x series. One
3 major feature is Vanguards Lite, from proposal 333, to help mitigate
4 guard discovery attacks against onion services. It also includes
7 o Major features (Proposal 332, onion services, guard selection algorithm):
8 - Clients and onion services now choose four long-lived "layer 2"
9 guard relays for use as the middle hop in all onion circuits.
10 These relays are kept in place for a randomized duration averaging
11 1 week. This mitigates guard discovery attacks against clients and
12 short-lived onion services such as OnionShare. Long-lived onion
13 services that need high security should still use the Vanguards
14 addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
15 40363; implements proposal 333.
17 o Minor features (bridge testing support):
18 - Let external bridge reachability testing tools discard cached
19 bridge descriptors when setting new bridges, so they can be sure
20 to get a clean reachability test. Implements ticket 40209.
22 o Minor features (fuzzing):
23 - When building with --enable-libfuzzer, use a set of compiler flags
24 that works with more recent versions of the library. Previously we
25 were using a set of flags from 2017. Closes ticket 40407.
27 o Minor features (testing configuration):
28 - When TestingTorNetwork is enabled, skip the permissions check on
29 hidden service directories. Closes ticket 40338.
30 - On a testing network, relays can now use the
31 TestingMinTimeToReportBandwidth option to change the smallest
32 amount of time over which they're willing to report their observed
33 maximum bandwidth. Previously, this was fixed at 1 day. For
34 safety, values under 2 hours are only supported on testing
35 networks. Part of a fix for ticket 40337.
36 - Relays on testing networks no longer rate-limit how frequently
37 they are willing to report new bandwidth measurements. Part of a
39 - Relays on testing networks now report their observed bandwidths
40 immediately from startup. Previously, they waited until they had
41 been running for a full day. Closes ticket 40337.
43 o Minor bugfixes (circuit padding):
44 - Don't send STOP circuit padding cells when the other side has
45 already shut down the corresponding padding machine. Fixes bug
46 40435; bugfix on 0.4.0.1-alpha.
48 o Minor bugfixes (compatibility):
49 - Fix compatibility with the most recent Libevent versions, which no
50 longer have an evdns_set_random_bytes() function. Because this
51 function has been a no-op since Libevent 2.0.4-alpha, it is safe
52 for us to just stop calling it. Fixes bug 40371; bugfix
55 o Minor bugfixes (control, sandbox):
56 - Allows the control command SAVECONF to succeed when the seccomp
57 sandbox is enabled. Makes SAVECONF keep only one backup file, to
58 simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
59 Patch by Daniel Pinto.
61 o Minor bugfixes (heartbeat):
62 - Adjust the heartbeat log message about distinct clients to
63 consider the HeartbeatPeriod rather than a flat 6-hour delay.
64 Fixes bug 40330; bugfix on 0.2.6.3-alpha.
66 o Minor bugfixes (logging, relay):
67 - Add spaces between the "and" when logging the "Your server has not
68 managed to confirm reachability for its" on dual-stack relays.
69 Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
71 o Minor bugfixes (onion service):
72 - Do not flag an HSDir as non-running in case the descriptor upload
73 or fetch fails. An onion service closes pending directory
74 connections before uploading a new descriptor which leads to
75 wrongly flagging many relays and thus affecting circuit path
76 selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
78 o Minor bugfixes (statistics):
79 - Fix a fencepost issue when we check stability_last_downrated where
80 we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
81 bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
83 o Minor bugfixes (tests):
84 - Fix a bug that prevented some tests from running with the correct
85 names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
88 - Add links to original tor design paper and anonbib to
89 docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
91 - Describe the "fingerprint-ed25519" file in the tor.1 man page.
92 Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
95 Changes in version 0.4.6.7 - 2021-08-16
96 This version fixes several bugs from earlier versions of Tor,
97 including one that could lead to a denial-of-service attack. Everyone
98 running an earlier version, whether as a client, a relay, or an onion
99 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
101 o Major bugfixes (cryptography, security):
102 - Resolve an assertion failure caused by a behavior mismatch between
103 our batch-signature verification code and our single-signature
104 verification code. This assertion failure could be triggered
105 remotely, leading to a denial of service attack. We fix this issue
106 by disabling batch verification. Fixes bug 40078; bugfix on
107 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
108 CVE-2021-38385. Found by Henry de Valence.
110 o Minor feature (fallbackdir):
111 - Regenerate fallback directories list. Close ticket 40447.
113 o Minor features (geoip data):
114 - Update the geoip files to match the IPFire Location Database, as
115 retrieved on 2021/08/12.
117 o Minor bugfix (crypto):
118 - Disable the unused batch verification feature of ed25519-donna.
119 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
122 o Minor bugfixes (onion service):
123 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
124 Address) for a v2 onion address. Fixes bug 40421; bugfix
127 o Minor bugfixes (relay):
128 - Reduce the compression level for data streaming from HIGH to LOW
129 in order to reduce CPU load on the directory relays. Fixes bug
130 40301; bugfix on 0.3.5.1-alpha.
132 o Minor bugfixes (timekeeping):
133 - Calculate the time of day correctly on systems where the time_t
134 type includes leap seconds. (This is not the case on most
135 operating systems, but on those where it occurs, our tor_timegm
136 function did not correctly invert the system's gmtime function,
137 which could result in assertion failures when calculating voting
138 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
141 Changes in version 0.4.5.10 - 2021-08-16
142 This version fixes several bugs from earlier versions of Tor,
143 including one that could lead to a denial-of-service attack. Everyone
144 running an earlier version, whether as a client, a relay, or an onion
145 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
147 o Major bugfixes (cryptography, security):
148 - Resolve an assertion failure caused by a behavior mismatch between
149 our batch-signature verification code and our single-signature
150 verification code. This assertion failure could be triggered
151 remotely, leading to a denial of service attack. We fix this issue
152 by disabling batch verification. Fixes bug 40078; bugfix on
153 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
154 CVE-2021-38385. Found by Henry de Valence.
156 o Minor feature (fallbackdir):
157 - Regenerate fallback directories list. Close ticket 40447.
159 o Minor features (geoip data):
160 - Update the geoip files to match the IPFire Location Database, as
161 retrieved on 2021/08/12.
163 o Minor features (testing):
164 - Enable the deterministic RNG for unit tests that covers the
165 address set bloomfilter-based API's. Fixes bug 40419; bugfix
168 o Minor bugfix (crypto, backport from 0.4.6.7):
169 - Disable the unused batch verification feature of ed25519-donna.
170 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
173 o Minor bugfixes (relay, backport from 0.4.6.7):
174 - Reduce the compression level for data streaming from HIGH to LOW.
175 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
177 o Minor bugfixes (timekeeping, backport from 0.4.6.7):
178 - Calculate the time of day correctly on systems where the time_t
179 type includes leap seconds. (This is not the case on most
180 operating systems, but on those where it occurs, our tor_timegm
181 function did not correctly invert the system's gmtime function,
182 which could result in assertion failures when calculating voting
183 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
185 o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
186 - Suppress a strict-prototype warning when building with some
187 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
190 Changes in version 0.3.5.16 - 2021-08-16
191 This version fixes several bugs from earlier versions of Tor,
192 including one that could lead to a denial-of-service attack. Everyone
193 running an earlier version, whether as a client, a relay, or an onion
194 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
196 o Major bugfixes (cryptography, security):
197 - Resolve an assertion failure caused by a behavior mismatch between
198 our batch-signature verification code and our single-signature
199 verification code. This assertion failure could be triggered
200 remotely, leading to a denial of service attack. We fix this issue
201 by disabling batch verification. Fixes bug 40078; bugfix on
202 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
203 CVE-2021-38385. Found by Henry de Valence.
205 o Minor feature (fallbackdir):
206 - Regenerate fallback directories list. Close ticket 40447.
208 o Minor features (geoip data):
209 - Update the geoip files to match the IPFire Location Database, as
210 retrieved on 2021/08/12.
212 o Minor bugfix (crypto, backport from 0.4.6.7):
213 - Disable the unused batch verification feature of ed25519-donna.
214 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
217 o Minor bugfixes (relay, backport from 0.4.6.7):
218 - Reduce the compression level for data streaming from HIGH to LOW.
219 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
222 Changes in version 0.4.6.6 - 2021-06-30
223 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
224 allows Tor to build correctly on older versions of GCC. You should
225 upgrade to this version if you were having trouble building Tor
226 0.4.6.5; otherwise, there is probably no need.
228 o Minor bugfixes (compilation):
229 - Fix a compilation error when trying to build Tor with a compiler
230 that does not support const variables in static initializers.
231 Fixes bug 40410; bugfix on 0.4.6.5.
232 - Suppress a strict-prototype warning when building with some
233 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
235 o Minor bugfixes (testing):
236 - Enable the deterministic RNG for unit tests that covers the
237 address set bloomfilter-based API's. Fixes bug 40419; bugfix
241 Changes in version 0.4.5.9 - 2021-06-14
242 Tor 0.4.5.9 fixes several security issues, including a
243 denial-of-service attack against onion service clients, and another
244 denial-of-service attack against relays. Everybody should upgrade to
245 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
247 o Major bugfixes (security, backport from 0.4.6.5):
248 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
249 half-closed streams. Previously, clients failed to validate which
250 hop sent these cells: this would allow a relay on a circuit to end
251 a stream that wasn't actually built with it. Fixes bug 40389;
252 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
253 003 and CVE-2021-34548.
255 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
256 - Detect more failure conditions from the OpenSSL RNG code.
257 Previously, we would detect errors from a missing RNG
258 implementation, but not failures from the RNG code itself.
259 Fortunately, it appears those failures do not happen in practice
260 when Tor is using OpenSSL's default RNG implementation. Fixes bug
261 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
262 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
264 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
265 - Resist a hashtable-based CPU denial-of-service attack against
266 relays. Previously we used a naive unkeyed hash function to look
267 up circuits in a circuitmux object. An attacker could exploit this
268 to construct circuits with chosen circuit IDs, to create
269 collisions and make the hash table inefficient. Now we use a
270 SipHash construction here instead. Fixes bug 40391; bugfix on
271 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
272 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
273 - Fix an out-of-bounds memory access in v3 onion service descriptor
274 parsing. An attacker could exploit this bug by crafting an onion
275 service descriptor that would crash any client that tried to visit
276 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
277 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
278 Glazunov from Google's Project Zero.
280 o Minor features (compatibility, backport from 0.4.6.4-rc):
281 - Remove an assertion function related to TLS renegotiation. It was
282 used nowhere outside the unit tests, and it was breaking
283 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
286 o Minor features (geoip data):
287 - Update the geoip files to match the IPFire Location Database, as
288 retrieved on 2021/06/10.
290 o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
291 - Allow the control command SAVECONF to succeed when the seccomp
292 sandbox is enabled, and make SAVECONF keep only one backup file to
293 simplify implementation. Previously SAVECONF allowed a large
294 number of backup files, which made it incompatible with the
295 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
298 o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
299 - Fix a bug that made tor try to re-bind() on an already open
300 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
304 Changes in version 0.4.4.9 - 2021-06-14
305 Tor 0.4.4.9 fixes several security issues, including a
306 denial-of-service attack against onion service clients, and another
307 denial-of-service attack against relays. Everybody should upgrade to
308 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
310 Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
311 June 15. This is therefore the last release in its series. Everybody
312 still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
314 o Major bugfixes (security, backport from 0.4.6.5):
315 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
316 half-closed streams. Previously, clients failed to validate which
317 hop sent these cells: this would allow a relay on a circuit to end
318 a stream that wasn't actually built with it. Fixes bug 40389;
319 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
320 003 and CVE-2021-34548.
322 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
323 - Detect more failure conditions from the OpenSSL RNG code.
324 Previously, we would detect errors from a missing RNG
325 implementation, but not failures from the RNG code itself.
326 Fortunately, it appears those failures do not happen in practice
327 when Tor is using OpenSSL's default RNG implementation. Fixes bug
328 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
329 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
331 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
332 - Resist a hashtable-based CPU denial-of-service attack against
333 relays. Previously we used a naive unkeyed hash function to look
334 up circuits in a circuitmux object. An attacker could exploit this
335 to construct circuits with chosen circuit IDs, to create
336 collisions and make the hash table inefficient. Now we use a
337 SipHash construction here instead. Fixes bug 40391; bugfix on
338 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
339 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
340 - Fix an out-of-bounds memory access in v3 onion service descriptor
341 parsing. An attacker could exploit this bug by crafting an onion
342 service descriptor that would crash any client that tried to visit
343 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
344 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
345 Glazunov from Google's Project Zero.
347 o Minor features (compatibility, backport from 0.4.6.4-rc):
348 - Remove an assertion function related to TLS renegotiation. It was
349 used nowhere outside the unit tests, and it was breaking
350 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
353 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
354 - Regenerate the list of fallback directories to contain a new set
355 of 200 relays. Closes ticket 40265.
357 o Minor features (geoip data):
358 - Update the geoip files to match the IPFire Location Database, as
359 retrieved on 2021/06/10.
361 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
362 - Fix a non-fatal BUG() message due to a too-early free of a string,
363 when listing a client connection from the DoS defenses subsystem.
364 Fixes bug 40345; bugfix on 0.4.3.4-rc.
366 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
367 - Fix an indentation problem that led to a warning from GCC 11.1.1.
368 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
371 Changes in version 0.3.5.15 - 2021-06-14
372 Tor 0.3.5.15 fixes several security issues, including a
373 denial-of-service attack against onion service clients, and another
374 denial-of-service attack against relays. Everybody should upgrade to
375 one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
377 o Major bugfixes (security, backport from 0.4.6.5):
378 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
379 half-closed streams. Previously, clients failed to validate which
380 hop sent these cells: this would allow a relay on a circuit to end
381 a stream that wasn't actually built with it. Fixes bug 40389;
382 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
383 003 and CVE-2021-34548.
385 o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
386 - Detect more failure conditions from the OpenSSL RNG code.
387 Previously, we would detect errors from a missing RNG
388 implementation, but not failures from the RNG code itself.
389 Fortunately, it appears those failures do not happen in practice
390 when Tor is using OpenSSL's default RNG implementation. Fixes bug
391 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
392 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
394 o Major bugfixes (security, denial of service, backport from 0.4.6.5):
395 - Resist a hashtable-based CPU denial-of-service attack against
396 relays. Previously we used a naive unkeyed hash function to look
397 up circuits in a circuitmux object. An attacker could exploit this
398 to construct circuits with chosen circuit IDs, to create
399 collisions and make the hash table inefficient. Now we use a
400 SipHash construction here instead. Fixes bug 40391; bugfix on
401 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
402 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
403 - Fix an out-of-bounds memory access in v3 onion service descriptor
404 parsing. An attacker could exploit this bug by crafting an onion
405 service descriptor that would crash any client that tried to visit
406 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
407 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
408 Glazunov from Google's Project Zero.
410 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
411 - Fix an indentation problem that led to a warning from GCC 11.1.1.
412 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
414 o Minor features (compatibility, backport from 0.4.6.4-rc):
415 - Remove an assertion function related to TLS renegotiation. It was
416 used nowhere outside the unit tests, and it was breaking
417 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
420 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
421 - Regenerate the list of fallback directories to contain a new set
422 of 200 relays. Closes ticket 40265.
424 o Minor features (geoip data):
425 - Update the geoip files to match the IPFire Location Database, as
426 retrieved on 2021/06/10.
429 Changes in version 0.4.6.5 - 2021-06-14
430 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
431 series includes numerous features and bugfixes, including a significant
432 improvement to our circuit timeout algorithm that should improve
433 observed client performance, and a way for relays to report when they are
436 This release also includes security fixes for several security issues,
437 including a denial-of-service attack against onion service clients,
438 and another denial-of-service attack against relays. Everybody should
439 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
441 Below are the changes since 0.4.6.4-rc. For a complete list of changes
442 since 0.4.5.8, see the ReleaseNotes file.
444 o Major bugfixes (security):
445 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
446 half-closed streams. Previously, clients failed to validate which
447 hop sent these cells: this would allow a relay on a circuit to end
448 a stream that wasn't actually built with it. Fixes bug 40389;
449 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
450 003 and CVE-2021-34548.
452 o Major bugfixes (security, defense-in-depth):
453 - Detect more failure conditions from the OpenSSL RNG code.
454 Previously, we would detect errors from a missing RNG
455 implementation, but not failures from the RNG code itself.
456 Fortunately, it appears those failures do not happen in practice
457 when Tor is using OpenSSL's default RNG implementation. Fixes bug
458 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
459 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
461 o Major bugfixes (security, denial of service):
462 - Resist a hashtable-based CPU denial-of-service attack against
463 relays. Previously we used a naive unkeyed hash function to look
464 up circuits in a circuitmux object. An attacker could exploit this
465 to construct circuits with chosen circuit IDs, to create
466 collisions and make the hash table inefficient. Now we use a
467 SipHash construction here instead. Fixes bug 40391; bugfix on
468 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
469 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
470 - Fix an out-of-bounds memory access in v3 onion service descriptor
471 parsing. An attacker could exploit this bug by crafting an onion
472 service descriptor that would crash any client that tried to visit
473 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
474 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
475 Glazunov from Google's Project Zero.
477 o Minor features (geoip data):
478 - Update the geoip files to match the IPFire Location Database, as
479 retrieved on 2021/06/10.
481 o Minor features (logging, diagnostic):
482 - Log decompression failures at a higher severity level, since they
483 can help provide missing context for other warning messages. We
484 rate-limit these messages, to avoid flooding the logs if they
485 begin to occur frequently. Closes ticket 40175.
488 Changes in version 0.4.6.4-rc - 2021-05-28
489 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
490 the final release candidate in its series: unless major new issues are
491 found, the next release will be stable.
493 o Minor features (compatibility):
494 - Remove an assertion function related to TLS renegotiation. It was
495 used nowhere outside the unit tests, and it was breaking
496 compilation with recent alpha releases of OpenSSL 3.0.0. Closes
499 o Minor bugfixes (consensus handling):
500 - Avoid a set of bugs that could be caused by inconsistently
501 preferring an out-of-date consensus stored in a stale directory
502 cache over a more recent one stored on disk as the latest
503 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
505 o Minor bugfixes (control, sandbox):
506 - Allow the control command SAVECONF to succeed when the seccomp
507 sandbox is enabled, and make SAVECONF keep only one backup file to
508 simplify implementation. Previously SAVECONF allowed a large
509 number of backup files, which made it incompatible with the
510 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
513 o Minor bugfixes (metrics port):
514 - Fix a bug that made tor try to re-bind() on an already open
515 MetricsPort every 60 seconds. Fixes bug 40370; bugfix
519 - Remove unneeded code for parsing private keys in directory
520 documents. This code was only used for client authentication in v2
521 onion services, which are now unsupported. Closes ticket 40374.
524 Changes in version 0.4.5.8 - 2021-05-10
525 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
526 from the 0.4.6.x series.
528 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
529 - Add a workaround to enable the Linux sandbox to work correctly
530 with Glibc 2.33. This version of Glibc has started using the
531 fstatat() system call, which previously our sandbox did not allow.
532 Closes ticket 40382; see the ticket for a discussion of trade-offs.
534 o Minor features (compilation, backport from 0.4.6.3-rc):
535 - Make the autoconf script build correctly with autoconf versions
536 2.70 and later. Closes part of ticket 40335.
538 o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
539 - Regenerate the list of fallback directories to contain a new set
540 of 200 relays. Closes ticket 40265.
542 o Minor features (geoip data):
543 - Update the geoip files to match the IPFire Location Database, as
544 retrieved on 2021/05/07.
546 o Minor features (onion services):
547 - Add warning message when connecting to now deprecated v2 onion
548 services. As announced, Tor 0.4.5.x is the last series that will
549 support v2 onions. Closes ticket 40373.
551 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
552 - Fix a regression that made it impossible start Tor using a bridge
553 line with a transport name and no fingerprint. Fixes bug 40360;
554 bugfix on 0.4.5.4-rc.
556 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
557 - Allow a custom "ar" for cross-compilation. Our previous build
558 script had used the $AR environment variable in most places, but
559 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
561 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
562 - Fix a non-fatal BUG() message due to a too-early free of a string,
563 when listing a client connection from the DoS defenses subsystem.
564 Fixes bug 40345; bugfix on 0.4.3.4-rc.
566 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
567 - Fix an indentation problem that led to a warning from GCC 11.1.1.
568 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
570 o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
571 - Fix a "BUG" warning that would appear when a controller chooses
572 the first hop for a circuit, and that circuit completes. Fixes bug
573 40285; bugfix on 0.3.2.1-alpha.
575 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
576 - Fix a bug where an expired cached descriptor could get overwritten
577 with a new one without freeing it, leading to a memory leak. Fixes
578 bug 40356; bugfix on 0.3.5.1-alpha.
580 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
581 - Fix pattern-matching errors when patterns expand to invalid paths
582 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
586 Changes in version 0.4.6.3-rc - 2021-05-10
587 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
588 a few small bugs from previous versions, and adds a better error
589 message when trying to use (no longer supported) v2 onion services.
591 Though we anticipate that we'll be doing a bit more clean-up between
592 now and the stable release, we expect that our remaining changes will
593 be fairly simple. There will likely be at least one more release
594 candidate before 0.4.6.x is stable.
596 o Major bugfixes (onion service, control port):
597 - Make the ADD_ONION command properly configure client authorization.
598 Before this fix, the created onion failed to add the client(s).
599 Fixes bug 40378; bugfix on 0.4.6.1-alpha.
601 o Minor features (compatibility, Linux seccomp sandbox):
602 - Add a workaround to enable the Linux sandbox to work correctly
603 with Glibc 2.33. This version of Glibc has started using the
604 fstatat() system call, which previously our sandbox did not allow.
605 Closes ticket 40382; see the ticket for a discussion of trade-offs.
607 o Minor features (compilation):
608 - Make the autoconf script build correctly with autoconf versions
609 2.70 and later. Closes part of ticket 40335.
611 o Minor features (geoip data):
612 - Update the geoip files to match the IPFire Location Database, as
613 retrieved on 2021/05/07.
615 o Minor features (onion services):
616 - Add a warning message when trying to connect to (no longer
617 supported) v2 onion services. Closes ticket 40373.
619 o Minor bugfixes (build, cross-compilation):
620 - Allow a custom "ar" for cross-compilation. Our previous build
621 script had used the $AR environment variable in most places, but
622 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
624 o Minor bugfixes (compiler warnings):
625 - Fix an indentation problem that led to a warning from GCC 11.1.1.
626 Fixes bug 40380; bugfix on 0.3.0.1-alpha.
628 o Minor bugfixes (logging, relay):
629 - Emit a warning if an Address is found to be internal and tor can't
630 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
632 o Minor bugfixes (onion service, client, memory leak):
633 - Fix a bug where an expired cached descriptor could get overwritten
634 with a new one without freeing it, leading to a memory leak. Fixes
635 bug 40356; bugfix on 0.3.5.1-alpha.
638 Changes in version 0.4.6.2-alpha - 2021-04-15
639 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
640 small bugs in previous releases, and solves other issues that had
641 enabled denial-of-service attacks and affected integration with
644 o Minor features (client):
645 - Clients now check whether their streams are attempting to re-enter
646 the Tor network (i.e. to send Tor traffic over Tor), and close
647 them preemptively if they think exit relays will refuse them for
648 this reason. See ticket 2667 for details. Closes ticket 40271.
650 o Minor features (command line):
651 - Add long format name "--torrc-file" equivalent to the existing
652 command-line option "-f". Closes ticket 40324. Patch by
655 o Minor features (dormant mode):
656 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
657 control over whether the client ever becomes dormant from
658 inactivity. Most people won't need this. Closes ticket 40228.
660 o Minor features (fallback directory list):
661 - Regenerate the list of fallback directories to contain a new set
662 of 200 relays. Closes ticket 40265.
664 o Minor features (geoip data):
665 - Update the geoip files to match the IPFire Location Database, as
666 retrieved on 2021/04/13.
668 o Minor features (logging):
669 - Edit heartbeat log messages so that more of them begin with the
670 string "Heartbeat: ". Closes ticket 40322; patch
673 o Minor bugfixes (bridge, pluggable transport):
674 - Fix a regression that made it impossible start Tor using a bridge
675 line with a transport name and no fingerprint. Fixes bug 40360;
676 bugfix on 0.4.5.4-rc.
678 o Minor bugfixes (channel, DoS):
679 - Fix a non-fatal BUG() message due to a too-early free of a string,
680 when listing a client connection from the DoS defenses subsystem.
681 Fixes bug 40345; bugfix on 0.4.3.4-rc.
683 o Minor bugfixes (compilation):
684 - Fix a compilation warning about unused functions when building
685 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
686 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
688 o Minor bugfixes (configuration):
689 - Fix pattern-matching for directories on all platforms when using
690 %include options in configuration files. This patch also fixes
691 compilation on musl libc based systems. Fixes bug 40141; bugfix
694 o Minor bugfixes (relay):
695 - Move the "overload-general" line from extrainfo to the server
696 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
698 o Minor bugfixes (testing, BSD):
699 - Fix pattern-matching errors when patterns expand to invalid paths
700 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
703 o Documentation (manual):
704 - Move the ServerTransport* options to the "SERVER OPTIONS" section.
706 - Indicate that the HiddenServiceStatistics option also applies to
707 bridges. Closes ticket 40346.
708 - Move the description of BridgeRecordUsageByCountry to the section
709 "STATISTICS OPTIONS". Closes ticket 40323.
712 Changes in version 0.4.6.1-alpha - 2021-03-18
713 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
714 improves client circuit performance, adds missing features, and
715 improves some of our DoS handling and statistics reporting. It also
716 includes numerous smaller bugfixes.
718 Below are the changes since 0.4.5.7. (Note that this release DOES
719 include the fixes for the security bugs already fixed in 0.4.5.7.)
721 o Major features (control port, onion services):
722 - Add controller support for creating version 3 onion services with
723 client authorization. Previously, only v2 onion services could be
724 created with client authorization. Closes ticket 40084. Patch by
727 o Major features (directory authority):
728 - When voting on a relay with a Sybil-like appearance, add the Sybil
729 flag when clearing out the other flags. This lets a relay operator
730 know why their relay hasn't been included in the consensus. Closes
731 ticket 40255. Patch by Neel Chauhan.
733 o Major features (metrics):
734 - Relays now report how overloaded they are in their extrainfo
735 documents. This information is controlled with the
736 OverloadStatistics torrc option, and it will be used to improve
737 decisions about the network's load balancing. Implements proposal
738 328; closes ticket 40222.
740 o Major features (relay, denial of service):
741 - Add a new DoS subsystem feature to control the rate of client
742 connections for relays. Closes ticket 40253.
744 o Major features (statistics):
745 - Relays now publish statistics about the number of v3 onion
746 services and volume of v3 onion service traffic, in the same
747 manner they already do for v2 onions. Closes ticket 23126.
749 o Major bugfixes (circuit build timeout):
750 - Improve the accuracy of our circuit build timeout calculation for
751 60%, 70%, and 80% build rates for various guard choices. We now
752 use a maximum likelihood estimator for Pareto parameters of the
753 circuit build time distribution, instead of a "right-censored
754 estimator". This causes clients to ignore circuits that never
755 finish building in their timeout calculations. Previously, clients
756 were counting such unfinished circuits as having the highest
757 possible build time value, when in reality these circuits most
758 likely just contain relays that are offline. We also now wait a
759 bit longer to let circuits complete for measurement purposes,
760 lower the minimum possible effective timeout from 1.5 seconds to
761 10ms, and increase the resolution of the circuit build time
762 histogram from 50ms bin widths to 10ms bin widths. Additionally,
763 we alter our estimate Xm by taking the maximum of the top 10 most
764 common build time values of the 10ms histogram, and compute Xm as
765 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
766 - Remove max_time calculation and associated warning from circuit
767 build timeout 'alpha' parameter estimation, as this is no longer
768 needed by our new estimator from 40168. Fixes bug 34088; bugfix
771 o Major bugfixes (signing key):
772 - In the tor-gencert utility, give an informative error message if
773 the passphrase given in `--create-identity-key` is too short.
774 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
776 o Minor features (bridge):
777 - We now announce the URL to Tor's new bridge status at
778 https://bridges.torproject.org/ when Tor is configured to run as a
779 bridge relay. Closes ticket 30477.
781 o Minor features (build system):
782 - New "make lsp" command to auto generate the compile_commands.json
783 file used by the ccls server. The "bear" program is needed for
784 this. Closes ticket 40227.
786 o Minor features (command-line interface):
787 - Add build informations to `tor --version` in order to ease
788 reproducible builds. Closes ticket 32102.
789 - When parsing command-line flags that take an optional argument,
790 treat the argument as absent if it would start with a '-'
791 character. Arguments in that form are not intelligible for any of
792 our optional-argument flags. Closes ticket 40223.
793 - Allow a relay operator to list the ed25519 keys on the command
794 line by adding the `rsa` and `ed25519` arguments to the
795 --list-fingerprint flag to show the respective RSA and ed25519
796 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
798 o Minor features (control port, stream handling):
799 - Add the stream ID to the event line in the ADDRMAP control event.
800 Closes ticket 40249. Patch by Neel Chauhan.
802 o Minor features (dormant mode):
803 - Add a new 'DormantTimeoutEnabled' option for coarse-grained
804 control over whether the client can become dormant from
805 inactivity. Most people won't need this. Closes ticket 40228.
807 o Minor features (logging):
808 - Change the DoS subsystem heartbeat line format to be more clear on
809 what has been detected/rejected, and which option is disabled (if
810 any). Closes ticket 40308.
811 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
812 put brackets around IPv6 addresses in log messages. Closes ticket
813 40232. Patch by Neel Chauhan.
815 o Minor features (performance, windows):
816 - Use SRWLocks to implement locking on Windows. Replaces the
817 "critical section" locking implementation with the faster
818 SRWLocks, available since Windows Vista. Closes ticket 17927.
819 Patch by Daniel Pinto.
821 o Minor features (protocol, proxy support, defense in depth):
822 - Close HAProxy connections if they somehow manage to send us data
823 before we start reading. Closes another case of ticket 40017.
825 o Minor features (tests, portability):
826 - Port the hs_build_address.py test script to work with recent
827 versions of python. Closes ticket 40213. Patch from
830 o Minor features (vote document):
831 - Add a "stats" line to directory authority votes, to report various
832 statistics that authorities compute about the relays. This will
833 help us diagnose the network better. Closes ticket 40314.
835 o Minor bugfixes (build):
836 - The configure script now shows whether or not lzma and zstd have
837 been used, not just if the enable flag was passed in. Fixes bug
838 40236; bugfix on 0.4.3.1-alpha.
840 o Minor bugfixes (compatibility):
841 - Fix a failure in the test cases when running on the "hppa"
842 architecture, along with a related test that might fail on other
843 architectures in the future. Fixes bug 40274; bugfix
846 o Minor bugfixes (controller):
847 - Fix a "BUG" warning that would appear when a controller chooses
848 the first hop for a circuit, and that circuit completes. Fixes bug
849 40285; bugfix on 0.3.2.1-alpha.
851 o Minor bugfixes (directory authorities, voting):
852 - Add a new consensus method (31) to support any future changes that
853 authorities decide to make to the value of bwweightscale or
854 maxunmeasuredbw. Previously, there was a bug that prevented the
855 authorities from parsing these consensus parameters correctly under
856 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
858 o Minor bugfixes (ipv6):
859 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
860 rare configurations might break, but in this case you can disable
861 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
862 on 0.4.1.1-alpha. Patch by Neel Chauhan.
864 o Minor bugfixes (key generation):
865 - Do not require a valid torrc when using the `--keygen` argument to
866 generate a signing key. This allows us to generate keys on systems
867 or users which may not run Tor. Fixes bug 40235; bugfix on
868 0.2.7.2-alpha. Patch by Neel Chauhan.
870 o Minor bugfixes (onion services, logging):
871 - Downgrade the severity of a few rendezvous circuit-related
872 warnings from warning to info. Fixes bug 40207; bugfix on
873 0.3.2.1-alpha. Patch by Neel Chauhan.
875 o Minor bugfixes (relay):
876 - Reduce the compression level for data streaming from HIGH to LOW.
877 This should reduce the CPU and memory burden for directory caches.
878 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
880 o Code simplification and refactoring:
881 - Remove the orconn_ext_or_id_map structure and related functions.
882 (Nothing outside of unit tests used them.) Closes ticket 33383.
883 Patch by Neel Chauhan.
886 - As of this release, Tor no longer supports the old v2 onion
887 services. They were deprecated last July for security, and support
888 will be removed entirely later this year. We strongly encourage
889 everybody to migrate to v3 onion services. For more information,
890 see https://blog.torproject.org/v2-deprecation-timeline . Closes
891 ticket 40266. (NOTE: We accidentally released an earlier version
892 of the 0.4.6.1-alpha changelog without this entry. Sorry for
895 o Code simplification and refactoring (metrics, DoS):
896 - Move the DoS subsystem into the subsys manager, including its
897 configuration options. Closes ticket 40261.
899 o Removed features (relay):
900 - Because DirPorts are only used on authorities, relays no longer
901 advertise them. Similarly, self-testing for DirPorts has been
902 disabled, since an unreachable DirPort is no reason for a relay
903 not to advertise itself. (Configuring a DirPort will still work,
904 for now.) Closes ticket 40282.
907 Changes in version 0.3.5.14 - 2021-03-16
908 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
909 in earlier versions of Tor.
911 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
912 who can send directory data to a Tor instance to force that Tor
913 instance to consume huge amounts of CPU. This is easiest to exploit
914 against authorities, since anybody can upload to them, but directory
915 caches could also exploit this vulnerability against relays or clients
916 when they download. The other vulnerability (TROVE-2021-002) only
917 affects directory authorities, and would allow an attacker to remotely
918 crash the authority with an assertion failure. Patches have already
919 been provided to the authority operators, to help ensure
922 We recommend that everybody upgrade to one of the releases that fixes
923 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
926 This release also updates our GeoIP data source, and fixes a
929 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
930 - Disable the dump_desc() function that we used to dump unparseable
931 information to disk. It was called incorrectly in several places,
932 in a way that could lead to excessive CPU usage. Fixes bug 40286;
933 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
934 001 and CVE-2021-28089.
935 - Fix a bug in appending detached signatures to a pending consensus
936 document that could be used to crash a directory authority. Fixes
937 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
940 o Minor features (geoip data, backport from 0.4.5.7):
941 - We have switched geoip data sources. Previously we shipped IP-to-
942 country mappings from Maxmind's GeoLite2, but in 2019 they changed
943 their licensing terms, so we were unable to update them after that
944 point. We now ship geoip files based on the IPFire Location
945 Database instead. (See https://location.ipfire.org/ for more
946 information). This release updates our geoip files to match the
947 IPFire Location Database as retrieved on 2021/03/12. Closes
950 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
951 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
955 Changes in version 0.4.4.8 - 2021-03-16
956 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
957 in earlier versions of Tor.
959 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
960 who can send directory data to a Tor instance to force that Tor
961 instance to consume huge amounts of CPU. This is easiest to exploit
962 against authorities, since anybody can upload to them, but directory
963 caches could also exploit this vulnerability against relays or clients
964 when they download. The other vulnerability (TROVE-2021-002) only
965 affects directory authorities, and would allow an attacker to remotely
966 crash the authority with an assertion failure. Patches have already
967 been provided to the authority operators, to help ensure
970 We recommend that everybody upgrade to one of the releases that fixes
971 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
974 This release also updates our GeoIP data source, and fixes a
977 o Major bugfixes (security, denial of service, backport from 0.4.5.7):
978 - Disable the dump_desc() function that we used to dump unparseable
979 information to disk. It was called incorrectly in several places,
980 in a way that could lead to excessive CPU usage. Fixes bug 40286;
981 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
982 001 and CVE-2021-28089.
983 - Fix a bug in appending detached signatures to a pending consensus
984 document that could be used to crash a directory authority. Fixes
985 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
988 o Minor features (geoip data, backport from 0.4.5.7):
989 - We have switched geoip data sources. Previously we shipped IP-to-
990 country mappings from Maxmind's GeoLite2, but in 2019 they changed
991 their licensing terms, so we were unable to update them after that
992 point. We now ship geoip files based on the IPFire Location
993 Database instead. (See https://location.ipfire.org/ for more
994 information). This release updates our geoip files to match the
995 IPFire Location Database as retrieved on 2021/03/12. Closes
998 o Removed features (mallinfo deprecated, backport from 0.4.5.7):
999 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1000 Closes ticket 40309.
1003 Changes in version 0.4.5.7 - 2021-03-16
1004 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
1007 One of these vulnerabilities (TROVE-2021-001) would allow an attacker
1008 who can send directory data to a Tor instance to force that Tor
1009 instance to consume huge amounts of CPU. This is easiest to exploit
1010 against authorities, since anybody can upload to them, but directory
1011 caches could also exploit this vulnerability against relays or clients
1012 when they download. The other vulnerability (TROVE-2021-002) only
1013 affects directory authorities, and would allow an attacker to remotely
1014 crash the authority with an assertion failure. Patches have already
1015 been provided to the authority operators, to help ensure
1018 We recommend that everybody upgrade to one of the releases that fixes
1019 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
1022 This release also updates our GeoIP data source, and fixes a few
1023 smaller bugs in earlier releases.
1025 o Major bugfixes (security, denial of service):
1026 - Disable the dump_desc() function that we used to dump unparseable
1027 information to disk. It was called incorrectly in several places,
1028 in a way that could lead to excessive CPU usage. Fixes bug 40286;
1029 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
1030 001 and CVE-2021-28089.
1031 - Fix a bug in appending detached signatures to a pending consensus
1032 document that could be used to crash a directory authority. Fixes
1033 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
1036 o Minor features (geoip data):
1037 - We have switched geoip data sources. Previously we shipped IP-to-
1038 country mappings from Maxmind's GeoLite2, but in 2019 they changed
1039 their licensing terms, so we were unable to update them after that
1040 point. We now ship geoip files based on the IPFire Location
1041 Database instead. (See https://location.ipfire.org/ for more
1042 information). This release updates our geoip files to match the
1043 IPFire Location Database as retrieved on 2021/03/12. Closes
1046 o Minor bugfixes (directory authority):
1047 - Now that exit relays don't allow exit connections to directory
1048 authority DirPorts (to prevent network reentry), disable
1049 authorities' reachability self test on the DirPort. Fixes bug
1050 40287; bugfix on 0.4.5.5-rc.
1052 o Minor bugfixes (documentation):
1053 - Fix a formatting error in the documentation for
1054 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
1056 o Minor bugfixes (Linux, relay):
1057 - Fix a bug in determining total available system memory that would
1058 have been triggered if the format of Linux's /proc/meminfo file
1059 had ever changed to include "MemTotal:" in the middle of a line.
1060 Fixes bug 40315; bugfix on 0.2.5.4-alpha.
1062 o Minor bugfixes (metrics port):
1063 - Fix a BUG() warning on the MetricsPort for an internal missing
1064 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
1066 o Minor bugfixes (onion service):
1067 - Remove a harmless BUG() warning when reloading tor configured with
1068 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
1070 o Minor bugfixes (portability):
1071 - Fix a non-portable usage of "==" with "test" in the configure
1072 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
1074 o Minor bugfixes (relay):
1075 - Remove a spammy log notice falsely claiming that the IPv4/v6
1076 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
1077 - Do not query the address cache early in the boot process when
1078 deciding if a relay needs to fetch early directory information
1079 from an authority. This bug resulted in a relay falsely believing
1080 it didn't have an address and thus triggering an authority fetch
1081 at each boot. Related to our fix for 40300.
1083 o Removed features (mallinfo deprecated):
1084 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
1085 Closes ticket 40309.
1088 Changes in version 0.4.5.6 - 2021-02-15
1089 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
1090 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
1091 Karsten is best known for creating the Tor metrics portal and leading
1092 the metrics team, but he was involved in Tor from the early days. For
1093 example, while he was still a student he invented and implemented the
1094 v2 onion service directory design, and he also served as an ambassador
1095 to the many German researchers working in the anonymity field. We
1096 loved him and respected him for his patience, his consistency, and his
1097 welcoming approach to growing our community.
1099 This release series introduces significant improvements in relay IPv6
1100 address discovery, a new "MetricsPort" mechanism for relay operators
1101 to measure performance, LTTng support, build system improvements to
1102 help when using Tor as a static library, and significant bugfixes
1103 related to Windows relay performance. It also includes numerous
1104 smaller features and bugfixes.
1106 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1107 since 0.4.4.7, see the ReleaseNotes file.
1109 o Major bugfixes (IPv6, relay):
1110 - Fix a bug that prevented a relay from publishing its descriptor if
1111 an auto-discovered IPv6 that was found unreachable. Fixes bug
1112 40279; bugfix on 0.4.5.1-alpha.
1114 o Minor features (protocol versions):
1115 - Stop claiming to support the "DirCache=1" subprotocol version.
1116 Technically, we stopped supporting this subprotocol back in
1117 0.4.5.1-alpha, but we needed to wait for the authorities to stop
1118 listing it as "required" before we could drop it from the list.
1119 Closes ticket 40221.
1121 o Minor bugfixes (logging):
1122 - Avoid a spurious log message about missing subprotocol versions,
1123 when the consensus that we're reading from is older than the
1124 current release. Previously we had made this message nonfatal, but
1125 in practice, it is never relevant when the consensus is older than
1126 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
1128 o Minor bugfixes (metrics port):
1129 - Fix a bug warning when a metrics port socket was unexpectedly
1130 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
1132 o Minor bugfixes (relay):
1133 - Allow relays to have a RFC1918 address if PublishServerDescriptor
1134 is set to 0 and AssumeReachable is set to 1. This is to support
1135 the use case of a bridge on a local network, exposed via a
1136 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
1138 o Minor bugfixes (relay, config):
1139 - Fix a problem in the removal of duplicate ORPorts from the
1140 internal port list when loading the config file. We were removing
1141 the wrong ports, breaking valid torrc uses cases for multiple
1142 ORPorts of the same address family. Fixes bug 40289; bugfix
1146 Changes in version 0.4.4.7 - 2021-02-03
1147 Tor 0.4.4.7 backports numerous bugfixes from later releases,
1148 including one that made v3 onion services more susceptible to
1149 denial-of-service attacks, and a feature that makes some kinds of
1150 DoS attacks harder to perform.
1152 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1153 - Stop requiring a live consensus for v3 clients and services, and
1154 allow a "reasonably live" consensus instead. This allows v3 onion
1155 services to work even if the authorities fail to generate a
1156 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1159 o Major feature (exit, backport from 0.4.5.5-rc):
1160 - Re-entry into the network is now denied at the Exit level to all
1161 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1162 should help mitgate a set of denial-of-service attacks. Closes
1165 o Minor feature (build system, backport from 0.4.5.4-rc):
1166 - New "make lsp" command to generate the compile_commands.json file
1167 used by the ccls language server. The "bear" program is needed for
1168 this. Closes ticket 40227.
1170 o Minor features (compilation, backport from 0.4.5.2-rc):
1171 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1172 later. There are a number of APIs newly deprecated in OpenSSL
1173 3.0.0 that Tor still requires. (A later version of Tor will try to
1174 stop depending on these APIs.) Closes ticket 40165.
1176 o Minor features (crypto, backport from 0.4.5.3-rc):
1177 - Fix undefined behavior on our Keccak library. The bug only
1178 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1179 and would result in wrong digests. Fixes bug 40210; bugfix on
1180 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1181 weasel for diagnosing this.
1183 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1184 - Strip '\r' characters when reading text files on Unix platforms.
1185 This should resolve an issue where a relay operator migrates a
1186 relay from Windows to Unix, but does not change the line ending of
1187 Tor's various state files to match the platform, and the CRLF line
1188 endings from Windows end up leaking into other files such as the
1189 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1191 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1192 - Fix a compilation warning about unreachable fallthrough
1193 annotations when building with "--enable-all-bugs-are-fatal" on
1194 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1196 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1197 - Handle partial SOCKS5 messages correctly. Previously, our code
1198 would send an incorrect error message if it got a SOCKS5 request
1199 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1201 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1202 - Fix the `config/parse_tcp_proxy_line` test so that it works
1203 correctly on systems where the DNS provider hijacks invalid
1204 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1205 - Fix our Python reference-implementation for the v3 onion service
1206 handshake so that it works correctly with the version of hashlib
1207 provided by Python 3.9. Fixes part of bug 40179; bugfix
1209 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1210 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1213 Changes in version 0.4.3.8 - 2021-02-03
1214 Tor 0.4.3.8 backports numerous bugfixes from later releases,
1215 including one that made v3 onion services more susceptible to
1216 denial-of-service attacks, and a feature that makes some kinds of
1217 DoS attacks harder to perform.
1219 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
1220 which will reach end-of-life on 15 Feb 2021.
1222 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1223 - Stop requiring a live consensus for v3 clients and services, and
1224 allow a "reasonably live" consensus instead. This allows v3 onion
1225 services to work even if the authorities fail to generate a
1226 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1229 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1230 - Fix a bug where we were undercounting the Tor network's total
1231 onion service traffic, by ignoring any traffic originating from
1232 clients. Now we count traffic from both clients and services.
1233 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1235 o Major feature (exit, backport from 0.4.5.5-rc):
1236 - Re-entry into the network is now denied at the Exit level to all
1237 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1238 should help mitgate a set of denial-of-service attacks. Closes
1241 o Minor feature (build system, backport from 0.4.5.4-rc):
1242 - New "make lsp" command to generate the compile_commands.json file
1243 used by the ccls language server. The "bear" program is needed for
1244 this. Closes ticket 40227.
1246 o Minor features (compilation, backport from 0.4.5.2-rc):
1247 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1248 later. There are a number of APIs newly deprecated in OpenSSL
1249 3.0.0 that Tor still requires. (A later version of Tor will try to
1250 stop depending on these APIs.) Closes ticket 40165.
1252 o Minor features (crypto, backport from 0.4.5.3-rc):
1253 - Fix undefined behavior on our Keccak library. The bug only
1254 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1255 and would result in wrong digests. Fixes bug 40210; bugfix on
1256 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1257 weasel for diagnosing this.
1259 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1260 - Strip '\r' characters when reading text files on Unix platforms.
1261 This should resolve an issue where a relay operator migrates a
1262 relay from Windows to Unix, but does not change the line ending of
1263 Tor's various state files to match the platform, and the CRLF line
1264 endings from Windows end up leaking into other files such as the
1265 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1267 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1268 - Resolve a compilation warning that could occur in
1269 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1271 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1272 - Fix a compilation warning about unreachable fallthrough
1273 annotations when building with "--enable-all-bugs-are-fatal" on
1274 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1276 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1277 - Handle partial SOCKS5 messages correctly. Previously, our code
1278 would send an incorrect error message if it got a SOCKS5 request
1279 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1281 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1282 - Fix the `config/parse_tcp_proxy_line` test so that it works
1283 correctly on systems where the DNS provider hijacks invalid
1284 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1285 - Fix our Python reference-implementation for the v3 onion service
1286 handshake so that it works correctly with the version of hashlib
1287 provided by Python 3.9. Fixes part of bug 40179; bugfix
1289 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1290 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1293 Changes in version 0.3.5.13 - 2020-02-03
1294 Tor 0.3.5.13 backports numerous bugfixes from later releases,
1295 including one that made v3 onion services more susceptible to
1296 denial-of-service attacks, and a feature that makes some kinds of
1297 DoS attacks harder to perform.
1299 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
1300 - Stop requiring a live consensus for v3 clients and services, and
1301 allow a "reasonably live" consensus instead. This allows v3 onion
1302 services to work even if the authorities fail to generate a
1303 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1306 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
1307 - Fix a bug where we were undercounting the Tor network's total
1308 onion service traffic, by ignoring any traffic originating from
1309 clients. Now we count traffic from both clients and services.
1310 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1312 o Major feature (exit, backport from 0.4.5.5-rc):
1313 - Re-entry into the network is now denied at the Exit level to all
1314 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1315 should help mitgate a set of denial-of-service attacks. Closes
1318 o Minor feature (build system, backport from 0.4.5.4-rc):
1319 - New "make lsp" command to generate the compile_commands.json file
1320 used by the ccls language server. The "bear" program is needed for
1321 this. Closes ticket 40227.
1323 o Minor features (compilation, backport from 0.4.5.2-rc):
1324 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1325 later. There are a number of APIs newly deprecated in OpenSSL
1326 3.0.0 that Tor still requires. (A later version of Tor will try to
1327 stop depending on these APIs.) Closes ticket 40165.
1329 o Minor features (crypto, backport from 0.4.5.3-rc):
1330 - Fix undefined behavior on our Keccak library. The bug only
1331 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1332 and would result in wrong digests. Fixes bug 40210; bugfix on
1333 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1334 weasel for diagnosing this.
1336 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
1337 - Strip '\r' characters when reading text files on Unix platforms.
1338 This should resolve an issue where a relay operator migrates a
1339 relay from Windows to Unix, but does not change the line ending of
1340 Tor's various state files to match the platform, and the CRLF line
1341 endings from Windows end up leaking into other files such as the
1342 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1344 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
1345 - Resolve a compilation warning that could occur in
1346 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1348 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
1349 - Fix a compilation warning about unreachable fallthrough
1350 annotations when building with "--enable-all-bugs-are-fatal" on
1351 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1353 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
1354 - Handle partial SOCKS5 messages correctly. Previously, our code
1355 would send an incorrect error message if it got a SOCKS5 request
1356 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1358 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
1359 - Fix our Python reference-implementation for the v3 onion service
1360 handshake so that it works correctly with the version of hashlib
1361 provided by Python 3.9. Fixes part of bug 40179; bugfix
1363 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1364 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1367 Changes in version 0.4.5.5-rc - 2021-02-01
1368 Tor 0.4.5.5-rc is the third release candidate in its series. We're
1369 coming closer and closer to a stable release series. This release
1370 fixes an annoyance with address detection code, and somewhat mitigates
1371 an ongoing denial-of-service attack.
1373 We anticipate no more code changes between this and the stable
1374 release, though of course that could change.
1376 o Major feature (exit):
1377 - Re-entry into the network is now denied at the Exit level to all
1378 relays' ORPorts and authorities' ORPorts and DirPorts. This change
1379 should help mitgate a set of denial-of-service attacks. Closes
1382 o Minor bugfixes (relay, configuration):
1383 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
1384 for it can be found in the configuration. Fixes bug 40254; bugfix
1388 Changes in version 0.4.5.4-rc - 2021-01-22
1389 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
1390 several bugs present in previous releases.
1392 We expect that the stable release will be the same, or almost the
1393 same, as this release candidate, unless serious bugs are found.
1395 o Major bugfixes (authority, IPv6):
1396 - Do not consider multiple relays in the same IPv6 /64 network to be
1397 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
1399 o Major bugfixes (directory cache, performance, windows):
1400 - Limit the number of items in the consensus diff cache to 64 on
1401 Windows. We hope this will mitigate an issue where Windows relay
1402 operators reported Tor using 100% CPU, while we investigate better
1403 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
1405 o Minor feature (build system):
1406 - New "make lsp" command to generate the compile_commands.json file
1407 used by the ccls language server. The "bear" program is needed for
1408 this. Closes ticket 40227.
1410 o Minor features (authority, logging):
1411 - Log more information for directory authority operators during the
1412 consensus voting process, and while processing relay descriptors.
1413 Closes ticket 40245.
1414 - Reject obsolete router/extrainfo descriptors earlier and more
1415 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
1418 o Minor bugfixes (compilation):
1419 - Fix another warning about unreachable fallthrough annotations when
1420 building with "--enable-all-bugs-are-fatal" on some compilers.
1421 Fixes bug 40241; bugfix on 0.4.5.3-rc.
1422 - Change the linker flag ordering in our library search code so that
1423 it works for compilers that need the libraries to be listed in the
1424 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
1426 o Minor bugfixes (config, bridge):
1427 - Don't initiate a connection to a bridge configured to use a
1428 missing transport. This change reverts an earlier fix that would
1429 try to avoid such situations during configuration chcecking, but
1430 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
1433 o Minor bugfixes (onion services):
1434 - Avoid a non-fatal assertion in certain edge-cases when
1435 establishing a circuit to an onion service. Fixes bug 32666;
1436 bugfix on 0.3.0.3-alpha.
1438 o Minor bugfixes (relay):
1439 - If we were unable to build our descriptor, don't mark it as having
1440 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
1441 bugfix on 0.4.5.1-alpha.
1444 Changes in version 0.4.5.3-rc - 2021-01-12
1445 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
1446 several bugs, including one that broke onion services on certain older
1447 ARM CPUs, and another that made v3 onion services less reliable.
1449 Though we anticipate that we'll be doing a bit more clean-up between
1450 now and the stable release, we expect that our remaining changes will
1451 be fairly simple. There will be at least one more release candidate
1452 before 0.4.5.x is stable.
1454 o Major bugfixes (onion service v3):
1455 - Stop requiring a live consensus for v3 clients and services, and
1456 allow a "reasonably live" consensus instead. This allows v3 onion
1457 services to work even if the authorities fail to generate a
1458 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
1461 o Minor features (crypto):
1462 - Fix undefined behavior on our Keccak library. The bug only
1463 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
1464 and would result in wrong digests. Fixes bug 40210; bugfix on
1465 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
1466 weasel for diagnosing this.
1468 o Minor features (documentation):
1469 - Mention the "!badexit" directive that can appear in an authority's
1470 approved-routers file, and update the description of the
1471 "!invalid" directive. Closes ticket 40188.
1473 o Minor bugfixes (compilation):
1474 - Fix a compilation warning about unreachable fallthrough
1475 annotations when building with "--enable-all-bugs-are-fatal" on
1476 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
1477 - Fix the "--enable-static-tor" switch to properly set the "-static"
1478 compile option onto the tor binary only. Fixes bug 40111; bugfix
1481 o Minor bugfixes (config, bridge):
1482 - Really fix the case where torrc has a missing ClientTransportPlugin
1483 but is configured with a Bridge line and UseBridges. Previously,
1484 we didn't look at the managed proxy list and thus would fail for
1485 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
1487 o Minor bugfixes (logging, relay):
1488 - Log our address as reported by the directory authorities, if none
1489 was configured or detected before. Fixes bug 40201; bugfix
1491 - When a launching bandwidth testing circuit, don't incorrectly call
1492 it a reachability test, or trigger a "CHECKING_REACHABILITY"
1493 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
1495 o Minor bugfixes (relay, statistics):
1496 - Report the correct connection statistics in our extrainfo
1497 documents. Previously there was a problem in the file loading
1498 function which would wrongly truncate a state file, causing the
1499 wrong information to be reported. Fixes bug 40226; bugfix
1502 o Minor bugfixes (SOCKS5):
1503 - Handle partial SOCKS5 messages correctly. Previously, our code
1504 would send an incorrect error message if it got a SOCKS5 request
1505 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
1508 Changes in version 0.4.5.2-alpha - 2020-11-23
1509 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
1510 It fixes several bugs present in earlier releases, including one that
1511 made it impractical to run relays on Windows. It also adds a few small
1512 safety features to improve Tor's behavior in the presence of strange
1513 compile-time options, misbehaving proxies, and future versions
1516 o Major bugfixes (relay, windows):
1517 - Fix a bug in our implementation of condition variables on Windows.
1518 Previously, a relay on Windows would use 100% CPU after running
1519 for some time. Because of this change, Tor now require Windows
1520 Vista or later to build and run. Fixes bug 30187; bugfix on
1521 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
1522 the introduction of consensus diffs.) Patch by Daniel Pinto.
1524 o Minor features (compilation):
1525 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
1526 later. There are a number of APIs newly deprecated in OpenSSL
1527 3.0.0 that Tor still requires. (A later version of Tor will try to
1528 stop depending on these APIs.) Closes ticket 40165.
1530 o Minor features (protocol, proxy support, defense in depth):
1531 - Respond more deliberately to misbehaving proxies that leave
1532 leftover data on their connections, so as to make Tor even less
1533 likely to allow the proxies to pass their data off as having come
1534 from a relay. Closes ticket 40017.
1536 o Minor features (safety):
1537 - Log a warning at startup if Tor is built with compile-time options
1538 that are likely to make it less stable or reliable. Closes
1541 o Minor bugfixes (circuit, handshake):
1542 - In the v3 handshaking code, use connection_or_change_state() to
1543 change the state. Previously, we changed the state directly, but
1544 this did not pass the state change to the pubsub or channel
1545 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
1546 0.2.3.6-alpha. Patch by Neel Chauhan.
1548 o Minor bugfixes (compilation):
1549 - Use the correct 'ranlib' program when building libtor.a.
1550 Previously we used the default ranlib, which broke some kinds of
1551 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
1552 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
1553 bugfix on 0.4.5.1-alpha.
1554 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
1555 attempt to build. Linux supports that macro but not the BSDs.
1556 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
1558 o Minor bugfixes (configuration):
1559 - Exit Tor on a misconfiguration when the Bridge line is configured
1560 to use a transport but no corresponding ClientTransportPlugin can
1561 be found. Prior to this fix, Tor would attempt to connect to the
1562 bridge directly without using the transport, making it easier for
1563 adversaries to notice the bridge. Fixes bug 25528; bugfix
1565 - Fix an issue where an ORPort was compared with other kinds of
1566 ports, when it should have been only checked against other
1567 ORPorts. This bug would lead to "DirPort auto" getting ignored.
1568 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
1569 - Fix a bug where a second non-ORPort with a variant family (ex:
1570 SocksPort [::1]:9050) would be ignored due to a configuration
1571 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
1573 o Minor bugfixes (crash, relay, signing key):
1574 - Avoid assertion failures when we run Tor from the command line
1575 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
1576 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
1578 o Minor bugfixes (logging):
1579 - Remove trailing whitespace from control event log messages. Fixes
1580 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
1582 - Turn warning-level log message about SENDME failure into a debug-
1583 level message. (This event can happen naturally, and is no reason
1584 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
1586 o Minor bugfixes (relay, address discovery):
1587 - Don't trigger an IP change when no new valid IP can be found.
1588 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
1589 - When attempting to discover our IP, use a simple test circuit,
1590 rather than a descriptor fetch: the same address information is
1591 present in NETINFO cells, and is better authenticated there. Fixes
1592 bug 40071; bugfix on 0.4.5.1-alpha.
1594 o Minor bugfixes (testing):
1595 - Fix the `config/parse_tcp_proxy_line` test so that it works
1596 correctly on systems where the DNS provider hijacks invalid
1597 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
1598 - Fix unit tests that used newly generated list of routers so that
1599 they check them with respect to the date when they were generated,
1600 not with respect to the current time. Fixes bug 40187; bugfix
1602 - Fix our Python reference-implementation for the v3 onion service
1603 handshake so that it works correctly with the version of hashlib
1604 provided by Python 3.9. Fixes part of bug 40179; bugfix
1606 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
1607 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
1609 o Removed features (controller):
1610 - Remove the "GETINFO network-status" controller command. It has
1611 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
1614 Changes in version 0.4.4.6 - 2020-11-12
1615 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
1616 backports fixes from later releases, including a fix for TROVE-2020-
1617 005, a security issue that could be used, under certain cases, by an
1618 adversary to observe traffic patterns on a limited number of circuits
1619 intended for a different relay.
1621 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1622 - When completing a channel, relays now check more thoroughly to
1623 make sure that it matches any pending circuits before attaching
1624 those circuits. Previously, address correctness and Ed25519
1625 identities were not checked in this case, but only when extending
1626 circuits on an existing channel. Fixes bug 40080; bugfix on
1627 0.2.7.2-alpha. Resolves TROVE-2020-005.
1629 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
1630 - Authorities now list a different set of protocols as required and
1631 recommended. These lists have been chosen so that only truly
1632 recommended and/or required protocols are included, and so that
1633 clients using 0.2.9 or later will continue to work (even though
1634 they are not supported), whereas only relays running 0.3.5 or
1635 later will meet the requirements. Closes ticket 40162.
1636 - Make it possible to specify multiple ConsensusParams torrc lines.
1637 Now directory authority operators can for example put the main
1638 ConsensusParams config in one torrc file and then add to it from a
1639 different torrc file. Closes ticket 40164.
1641 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1642 - Tor no longer allows subprotocol versions larger than 63.
1643 Previously version numbers up to UINT32_MAX were allowed, which
1644 significantly complicated our code. Implements proposal 318;
1645 closes ticket 40133.
1647 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1648 - Fix a rendezvous cache unit test that was triggering an underflow
1649 on the global rend cache allocation. Fixes bug 40125; bugfix
1651 - Fix another rendezvous cache unit test that was triggering an
1652 underflow on the global rend cache allocation. Fixes bug 40126;
1653 bugfix on 0.2.8.1-alpha.
1655 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
1656 - Fix compiler warnings that would occur when building with
1657 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1658 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1659 - Resolve a compilation warning that could occur in
1660 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1662 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1663 - Remove a debug logging statement that uselessly spammed the logs.
1664 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1666 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1667 - Avoid a fatal assert() when failing to create a listener
1668 connection for an address that was in use. Fixes bug 40073; bugfix
1671 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
1672 - For HSFETCH commands on v2 onion services addresses, check the
1673 length of bytes decoded, not the base32 length. Fixes bug 34400;
1674 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1677 Changes in version 0.4.3.7 - 2020-11-12
1678 Tor 0.4.3.7 backports several bugfixes from later releases. It
1679 includes a fix for TROVE-2020-005, a security issue that could be
1680 used, under certain cases, by an adversary to observe traffic patterns
1681 on a limited number of circuits intended for a different relay.
1683 Please be aware that support for the 0.4.3.x series will end on 15
1684 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
1685 downgrade to 0.3.5.x, which will be supported until at least 1
1688 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
1689 - Replace the 148 fallback directories originally included in Tor
1690 0.4.1.4-rc (of which around 105 are still functional) with a list
1691 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1693 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1694 - When completing a channel, relays now check more thoroughly to
1695 make sure that it matches any pending circuits before attaching
1696 those circuits. Previously, address correctness and Ed25519
1697 identities were not checked in this case, but only when extending
1698 circuits on an existing channel. Fixes bug 40080; bugfix on
1699 0.2.7.2-alpha. Resolves TROVE-2020-005.
1701 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
1702 - When running with NSS enabled, make sure that NSS knows to expect
1703 nonblocking sockets. Previously, we set our TCP sockets as
1704 nonblocking, but did not tell NSS, which in turn could lead to
1705 unexpected blocking behavior. Fixes bug 40035; bugfix
1708 o Minor features (security, backport from 0.4.4.4-rc):
1709 - Channels using obsolete versions of the Tor link protocol are no
1710 longer allowed to circumvent address-canonicity checks. (This is
1711 only a minor issue, since such channels have no way to set ed25519
1712 keys, and therefore should always be rejected for circuits that
1713 specify ed25519 identities.) Closes ticket 40081.
1715 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1716 - Tor no longer allows subprotocol versions larger than 63.
1717 Previously version numbers up to UINT32_MAX were allowed, which
1718 significantly complicated our code. Implements proposal 318;
1719 closes ticket 40133.
1721 o Minor features (tests, backport from 0.4.4.5):
1722 - Our "make check" target now runs the unit tests in 8 parallel
1723 chunks. Doing this speeds up hardened CI builds by more than a
1724 factor of two. Closes ticket 40098.
1726 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1727 - Fix a rendezvous cache unit test that was triggering an underflow
1728 on the global rend cache allocation. Fixes bug 40125; bugfix
1730 - Fix another rendezvous cache unit test that was triggering an
1731 underflow on the global rend cache allocation. Fixes bug 40126;
1732 bugfix on 0.2.8.1-alpha.
1734 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
1735 - Fix a correctness bug that could cause an assertion failure if we
1736 ever tried using the buf_move_all() function with an empty input
1737 buffer. As far as we know, no released versions of Tor do this.
1738 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
1740 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1741 - Remove a debug logging statement that uselessly spammed the logs.
1742 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1744 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
1745 - On a bridge, treat all connections from an ExtORPort as remote by
1746 default for the purposes of rate-limiting. Previously, bridges
1747 would treat the connection as local unless they explicitly
1748 received a "USERADDR" command. ExtORPort connections still count
1749 as local if there is a USERADDR command with an explicit local
1750 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
1752 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1753 - Avoid a fatal assert() when failing to create a listener
1754 connection for an address that was in use. Fixes bug 40073; bugfix
1757 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
1758 - Adjust the rules for when to warn about having too many
1759 connections to other relays. Previously we'd tolerate up to 1.5
1760 connections per relay on average. Now we tolerate more connections
1761 for directory authorities, and raise the number of total
1762 connections we need to see before we warn. Fixes bug 33880; bugfix
1765 o Minor bugfixes (tests, 0.4.4.5):
1766 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1767 on its own. Previously, it would exit with an error. Fixes bug
1768 40099; bugfix on 0.2.8.1-alpha.
1770 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
1771 - For HSFETCH commands on v2 onion services addresses, check the
1772 length of bytes decoded, not the base32 length. Fixes bug 34400;
1773 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1775 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
1776 - Fix a bug that prevented Tor from starting if its log file grew
1777 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
1779 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
1780 - Add a deprecation warning for version 2 onion services. Closes
1783 o Removed features (backport from 0.4.4.3-alpha):
1784 - Our "check-local" test target no longer tries to use the
1785 Coccinelle semantic patching tool parse all the C files. While it
1786 is a good idea to try to make sure Coccinelle works on our C
1787 before we run a Coccinelle patch, doing so on every test run has
1788 proven to be disruptive. You can still run this tool manually with
1789 "make check-cocci". Closes ticket 40030. ticket 40030.
1792 Changes in version 0.3.5.12 - 2020-11-12
1793 Tor 0.4.3.7 backports several bugfixes from later releases. It
1794 includes a fix for TROVE-2020-005, a security issue that could be
1795 used, under certain cases, by an adversary to observe traffic patterns
1796 on a limited number of circuits intended for a different relay.
1798 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
1799 - Replace the 148 fallback directories originally included in Tor
1800 0.4.1.4-rc (of which around 105 are still functional) with a list
1801 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1803 o Major bugfixes (security, backport from 0.4.5.1-alpha):
1804 - When completing a channel, relays now check more thoroughly to
1805 make sure that it matches any pending circuits before attaching
1806 those circuits. Previously, address correctness and Ed25519
1807 identities were not checked in this case, but only when extending
1808 circuits on an existing channel. Fixes bug 40080; bugfix on
1809 0.2.7.2-alpha. Resolves TROVE-2020-005.
1811 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
1812 - When running with NSS enabled, make sure that NSS knows to expect
1813 nonblocking sockets. Previously, we set our TCP sockets as
1814 nonblocking, but did not tell NSS, which in turn could lead to
1815 unexpected blocking behavior. Fixes bug 40035; bugfix
1818 o Minor features (security, backport from 0.4.4.4-rc):
1819 - Channels using obsolete versions of the Tor link protocol are no
1820 longer allowed to circumvent address-canonicity checks. (This is
1821 only a minor issue, since such channels have no way to set ed25519
1822 keys, and therefore should always be rejected for circuits that
1823 specify ed25519 identities.) Closes ticket 40081.
1825 o Minor features (debugging, directory system):
1826 - Don't crash when we find a non-guard with a guard-fraction value
1827 set. Instead, log a bug warning, in an attempt to figure out how
1828 this happened. Diagnostic for ticket 32868.
1830 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
1831 - Tor no longer allows subprotocol versions larger than 63.
1832 Previously version numbers up to UINT32_MAX were allowed, which
1833 significantly complicated our code. Implements proposal 318;
1834 closes ticket 40133.
1836 o Minor features (tests, backport from 0.4.4.5):
1837 - Our "make check" target now runs the unit tests in 8 parallel
1838 chunks. Doing this speeds up hardened CI builds by more than a
1839 factor of two. Closes ticket 40098.
1841 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
1842 - Fix a rendezvous cache unit test that was triggering an underflow
1843 on the global rend cache allocation. Fixes bug 40125; bugfix
1845 - Fix another rendezvous cache unit test that was triggering an
1846 underflow on the global rend cache allocation. Fixes bug 40126;
1847 bugfix on 0.2.8.1-alpha.
1849 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
1850 - Fix a correctness bug that could cause an assertion failure if we
1851 ever tried using the buf_move_all() function with an empty input
1852 buffer. As far as we know, no released versions of Tor do this.
1853 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
1855 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
1856 - Remove a debug logging statement that uselessly spammed the logs.
1857 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1859 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
1860 - On a bridge, treat all connections from an ExtORPort as remote by
1861 default for the purposes of rate-limiting. Previously, bridges
1862 would treat the connection as local unless they explicitly
1863 received a "USERADDR" command. ExtORPort connections still count
1864 as local if there is a USERADDR command with an explicit local
1865 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
1867 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
1868 - Avoid a fatal assert() when failing to create a listener
1869 connection for an address that was in use. Fixes bug 40073; bugfix
1872 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
1873 - Adjust the rules for when to warn about having too many
1874 connections to other relays. Previously we'd tolerate up to 1.5
1875 connections per relay on average. Now we tolerate more connections
1876 for directory authorities, and raise the number of total
1877 connections we need to see before we warn. Fixes bug 33880; bugfix
1880 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
1881 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
1882 descriptors, when the IPv6 port was configured as "auto". Fixes
1883 bug 32588; bugfix on 0.2.3.9-alpha.
1885 o Minor bugfixes (tests, 0.4.4.5):
1886 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1887 on its own. Previously, it would exit with an error. Fixes bug
1888 40099; bugfix on 0.2.8.1-alpha.
1890 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
1891 - Fix a bug that prevented Tor from starting if its log file grew
1892 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
1894 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
1895 - Add a deprecation warning for version 2 onion services. Closes
1899 Changes in version 0.4.5.1-alpha - 2020-11-01
1900 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
1901 improves support for IPv6, address discovery and self-testing, code
1902 metrics and tracing.
1904 This release also fixes TROVE-2020-005, a security issue that could be
1905 used, under certain cases, by an adversary to observe traffic patterns
1906 on a limited number of circuits intended for a different relay. To
1907 mount this attack, the adversary would need to actively extend
1908 circuits to an incorrect address, as well as compromise a relay's
1909 legacy RSA-1024 key. We'll be backporting this fix to other release
1910 series soon, after it has had some testing.
1912 Here are the changes since 0.4.4.5.
1914 o Major features (build):
1915 - When building Tor, first link all object files into a single
1916 static library. This may help with embedding Tor in other
1917 programs. Note that most Tor functions do not constitute a part of
1918 a stable or supported API: only those functions in tor_api.h
1919 should be used if embedding Tor. Closes ticket 40127.
1921 o Major features (metrics):
1922 - Introduce a new MetricsPort which exposes, through an HTTP
1923 interface, a series of metrics that tor collects at runtime. At
1924 the moment, the only supported output format is Prometheus data
1925 model. Closes ticket 40063. See the manual page for more
1926 information and security considerations.
1927 o Major features (relay, IPv6):
1928 - The torrc option Address now supports IPv6. This unifies our
1929 address discovery interface to support IPv4, IPv6, and hostnames.
1930 Closes ticket 33233.
1931 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
1932 bridges. Closes ticket 33222.
1933 - Relays now automatically bind on IPv6 for their ORPort, unless
1934 specified otherwise with the IPv4Only flag. Closes ticket 33246.
1935 - When a relay with IPv6 support is told to open a connection to
1936 another relay, and the extend cell lists both IPv4 and IPv6
1937 addresses, the first relay now picks randomly which address to
1938 use. Closes ticket 33220.
1939 - Relays now track their IPv6 ORPort reachability separately from
1940 the reachability of their IPv4 ORPort. They will not publish a
1941 descriptor unless _both_ ports appear to be externally reachable.
1942 Closes ticket 34067.
1944 o Major features (tracing):
1945 - Add event-tracing library support for USDT and LTTng-UST, and a
1946 few tracepoints in the circuit subsystem. More will come
1947 incrementally. This feature is compiled out by default: it needs
1948 to be enabled at configure time. See documentation in
1949 doc/HACKING/Tracing.md. Closes ticket 32910.
1951 o Major bugfixes (security):
1952 - When completing a channel, relays now check more thoroughly to
1953 make sure that it matches any pending circuits before attaching
1954 those circuits. Previously, address correctness and Ed25519
1955 identities were not checked in this case, but only when extending
1956 circuits on an existing channel. Fixes bug 40080; bugfix on
1957 0.2.7.2-alpha. Resolves TROVE-2020-005.
1959 o Major bugfixes (TLS, buffer):
1960 - When attempting to read N bytes on a TLS connection, really try to
1961 read all N bytes. Previously, Tor would stop reading after the
1962 first TLS record, which can be smaller than the N bytes requested,
1963 and not check for more data until the next mainloop event. Fixes
1964 bug 40006; bugfix on 0.1.0.5-rc.
1966 o Minor features (address discovery):
1967 - If no Address statements are found, relays now prioritize guessing
1968 their address by looking at the local interface instead of the
1969 local hostname. If the interface address can't be found, the local
1970 hostname is used. Closes ticket 33238.
1972 o Minor features (admin tools):
1973 - Add a new --format argument to -key-expiration option to allow
1974 specifying the time format of the expiration date. Adds Unix
1975 timestamp format support. Patch by Daniel Pinto. Closes
1978 o Minor features (bootstrap reporting):
1979 - When reporting bootstrapping status on a relay, do not consider
1980 connections that have never been the target of an origin circuit.
1981 Previously, all connection failures were treated as potential
1982 bootstrapping failures, including connections that had been opened
1983 because of client requests. Closes ticket 25061.
1985 o Minor features (build):
1986 - When running the configure script, try to detect version
1987 mismatches between the OpenSSL headers and libraries, and suggest
1988 that the user should try "--with-openssl-dir". Closes 40138.
1989 - If the configure script has given any warnings, remind the user
1990 about them at the end of the script. Related to 40138.
1992 o Minor features (configuration):
1993 - Allow using wildcards (* and ?) with the %include option on
1994 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
1995 - Allow the configuration options EntryNodes, ExcludeNodes,
1996 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
1997 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
1998 Patch by Daniel Pinto.
2000 o Minor features (control port):
2001 - Add a DROPTIMEOUTS command to drop circuit build timeout history
2002 and reset the current timeout. Closes ticket 40002.
2003 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
2004 send a control port event. Closes ticket 32190. Patch by
2006 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
2007 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
2008 onion handshake counts respectively. Closes ticket 28279. Patch by
2011 o Minor features (control port, IPv6):
2012 - Tor relays now try to report to the controller when they are
2013 launching an IPv6 self-test. Closes ticket 34068.
2014 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
2015 control port to fetch the Tor host's respective IPv4 or IPv6
2016 address. We keep "GETINFO address" for backwards-compatibility.
2017 Closes ticket 40039. Patch by Neel Chauhan.
2019 o Minor features (directory authorities):
2020 - Authorities now list a different set of protocols as required and
2021 recommended. These lists have been chosen so that only truly
2022 recommended and/or required protocols are included, and so that
2023 clients using 0.2.9 or later will continue to work (even though
2024 they are not supported), whereas only relays running 0.3.5 or
2025 later will meet the requirements. Closes ticket 40162.
2026 - Add a new consensus method 30 that removes the unnecessary "="
2027 padding from ntor-onion-key. Closes ticket 7869. Patch by
2029 - Directory authorities now reject descriptors from relays running
2030 Tor versions from the obsolete 0.4.1 series. Resolves ticket
2031 34357. Patch by Neel Chauhan.
2032 - Make it possible to specify multiple ConsensusParams torrc lines.
2033 Now directory authority operators can for example put the main
2034 ConsensusParams config in one torrc file and then add to it from a
2035 different torrc file. Closes ticket 40164.
2036 - The AssumeReachable option no longer stops directory authorities
2037 from checking whether other relays are running. A new
2038 AuthDirTestReachability option can be used to disable these
2039 checks. Closes ticket 34445.
2040 - When looking for possible Sybil attacks, also consider IPv6
2041 addresses. Two routers are considered to have "the same" address
2042 by this metric if they are in the same /64 network. Patch from
2043 Maurice Pibouin. Closes ticket 7193.
2045 o Minor features (directory authorities, IPv6):
2046 - Make authorities add their IPv6 ORPort (if any) to the trusted
2047 servers list. Authorities previously added only their IPv4
2048 addresses. Closes ticket 32822.
2050 o Minor features (ed25519, relay):
2051 - Save a relay's base64-encoded ed25519 identity key to the data
2052 directory in a file named fingerprint-ed25519. Closes ticket
2053 30642. Patch by Neel Chauhan.
2055 o Minor features (heartbeat):
2056 - Include the total number of inbound and outbound IPv4 and IPv6
2057 connections in the heartbeat message. Closes ticket 29113.
2059 o Minor features (IPv6, ExcludeNodes):
2060 - Handle IPv6 addresses in ExcludeNodes; previously they were
2061 ignored. Closes ticket 34065. Patch by Neel Chauhan.
2063 o Minor features (logging):
2064 - Add the running glibc version to the log, and the compiled glibc
2065 version to the library list returned when using --library-versions.
2066 Patch from Daniel Pinto. Closes ticket 40047.
2067 - Consider an HTTP 301 response to be an error (like a 404) when
2068 processing a directory response. Closes ticket 40053.
2069 - Log directory fetch statistics as a single line. Closes
2071 - Provide more complete descriptions of our connections when logging
2072 about them. Closes ticket 40041.
2073 - When describing a relay in the logs, we now include its ed25519
2074 identity. Closes ticket 22668.
2076 o Minor features (onion services):
2077 - Only overwrite an onion service's existing hostname file if its
2078 contents are wrong. This enables read-only onion-service
2079 directories. Resolves ticket 40062. Patch by Neel Chauhan.
2081 o Minor features (pluggable transports):
2082 - Add an OutboundBindAddressPT option to allow users to specify
2083 which IPv4 and IPv6 address pluggable transports should use for
2084 outgoing IP packets. Tor does not have a way to enforce that the
2085 pluggable transport honors this option, so each pluggable transport
2086 needs to implement support on its own. Closes ticket 5304.
2088 o Minor features (relay address tracking):
2089 - We now store relay addresses for OR connections in a more logical
2090 way. Previously we would sometimes overwrite the actual address of
2091 a connection with a "canonical address", and then store the "real
2092 address" elsewhere to remember it. We now track the "canonical
2093 address" elsewhere for the cases where we need it, and leave the
2094 connection's address alone. Closes ticket 33898.
2096 o Minor features (relay):
2097 - If a relay is unable to discover its address, attempt to learn it
2098 from the NETINFO cell. Closes ticket 40022.
2099 - Log immediately when launching a relay self-check. Previously we
2100 would try to log before launching checks, or approximately when we
2101 intended to launch checks, but this tended to be error-prone.
2102 Closes ticket 34137.
2104 o Minor features (relay, address discovery):
2105 - If Address option is not found in torrc, attempt to learn our
2106 address with the configured ORPort address if any. Closes
2109 o Minor features (relay, IPv6):
2110 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
2111 reachability. Closes part of ticket 33224.
2112 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
2113 parameters to be used in an emergency to tell relays that they
2114 should publish even if they cannot complete their ORPort self-
2115 checks. Closes ticket 34064 and part of 33224.
2116 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
2117 - Declare support for the Relay=3 subprotocol version. Closes
2119 - When launching IPv6 ORPort self-test circuits, make sure that the
2120 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
2122 o Minor features (specification update):
2123 - Several fields in microdescriptors, router descriptors, and
2124 consensus documents that were formerly optional are now required.
2125 Implements proposal 315; closes ticket 40132.
2127 o Minor features (state management):
2128 - When loading the state file, remove entries from the statefile
2129 that have been obsolete for a long time. Ordinarily Tor preserves
2130 unrecognized entries in order to keep forward-compatibility, but
2131 these entries have not actually been used in any release since
2132 before 0.3.5.x. Closes ticket 40137.
2134 o Minor features (statistics, ipv6):
2135 - Relays now publish IPv6-specific counts of single-direction versus
2136 bidirectional relay connections. Closes ticket 33264.
2137 - Relays now publish their IPv6 read and write statistics over time,
2138 if statistics are enabled. Closes ticket 33263.
2140 o Minor features (subprotocol versions):
2141 - Tor no longer allows subprotocol versions larger than 63.
2142 Previously version numbers up to UINT32_MAX were allowed, which
2143 significantly complicated our code. Implements proposal 318;
2144 closes ticket 40133.
2145 - Use the new limitations on subprotocol versions due to proposal
2146 318 to simplify our implementation. Part of ticket 40133.
2148 o Minor features (testing configuration):
2149 - The TestingTorNetwork option no longer implicitly sets
2150 AssumeReachable to 1. This change allows us to test relays' self-
2151 testing mechanisms, and to test authorities' relay-testing
2152 functionality. Closes ticket 34446.
2154 o Minor features (testing):
2155 - Added unit tests for channel_matches_target_addr_for_extend().
2156 Closes Ticket 33919. Patch by MrSquanchee.
2158 o Minor features (tests, v2 onion services):
2159 - Fix a rendezvous cache unit test that was triggering an underflow
2160 on the global rend cache allocation. Fixes bug 40125; bugfix
2162 - Fix another rendezvous cache unit test that was triggering an
2163 underflow on the global rend cache allocation. Fixes bug 40126;
2164 bugfix on 0.2.8.1-alpha.
2166 o Minor bugfixes (circuit padding):
2167 - When circpad_send_padding_cell_for_callback is called,
2168 `is_padding_timer_scheduled` flag was not reset. Now it is set to
2169 0 at the top of that function. Fixes bug 32671; bugfix
2171 - Add a per-circuit padding machine instance counter, so we can
2172 differentiate between shutdown requests for old machines on a
2173 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
2174 - Add the ability to keep circuit padding machines if they match a
2175 set of circuit states or purposes. This allows us to have machines
2176 that start up under some conditions but don't shut down under
2177 others. We now use this mask to avoid starting up introduction
2178 circuit padding again after the machines have already completed.
2179 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
2181 o Minor bugfixes (compatibility):
2182 - Strip '\r' characters when reading text files on Unix platforms.
2183 This should resolve an issue where a relay operator migrates a
2184 relay from Windows to Unix, but does not change the line ending of
2185 Tor's various state files to match the platform, and the CRLF line
2186 endings from Windows end up leaking into other files such as the
2187 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
2189 o Minor bugfixes (compilation):
2190 - Fix compiler warnings that would occur when building with
2191 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
2192 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
2193 - Resolve a compilation warning that could occur in
2194 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
2196 o Minor bugfixes (configuration):
2197 - Fix bug where %including a pattern ending with */ would include
2198 files and folders (instead of folders only) in versions of glibc <
2199 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
2202 o Minor bugfixes (control port):
2203 - Make sure we send the SOCKS request address in relay begin cells
2204 when a stream is attached with the purpose
2205 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
2206 Patch by Neel Chauhan.
2208 o Minor bugfixes (logging):
2209 - Remove a debug logging statement that uselessly spammed the logs.
2210 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
2211 - When logging a rate-limited message about how many messages have
2212 been suppressed in the last N seconds, give an accurate value for
2213 N, rounded up to the nearest minute. Previously we would report
2214 the size of the rate-limiting interval, regardless of when the
2215 messages started to occur. Fixes bug 19431; bugfix
2218 o Minor bugfixes (relay configuration, crash):
2219 - Avoid a fatal assert() when failing to create a listener
2220 connection for an address that was in use. Fixes bug 40073; bugfix
2223 o Minor bugfixes (rust, protocol versions):
2224 - Declare support for the onion service introduction point denial of
2225 service extensions when building with Rust. Fixes bug 34248;
2226 bugfix on 0.4.2.1-alpha.
2227 - Make Rust protocol version support checks consistent with the
2228 undocumented error behavior of the corresponding C code. Fixes bug
2229 34251; bugfix on 0.3.3.5-rc.
2231 o Minor bugfixes (self-testing):
2232 - When receiving an incoming circuit, only accept it as evidence
2233 that we are reachable if the declared address of its channel is
2234 the same address we think that we have. Otherwise, it could be
2235 evidence that we're reachable on some other address. Fixes bug
2236 20165; bugfix on 0.1.0.1-rc.
2238 o Minor bugfixes (spec conformance):
2239 - Use the correct key type when generating signing->link
2240 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
2242 o Minor bugfixes (subprotocol versions):
2243 - Consistently reject extra commas, instead of only rejecting
2244 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
2245 - In summarize_protover_flags(), treat empty strings the same as
2246 NULL. This prevents protocols_known from being set. Previously, we
2247 treated empty strings as normal strings, which led to
2248 protocols_known being set. Fixes bug 34232; bugfix on
2249 0.3.3.2-alpha. Patch by Neel Chauhan.
2251 o Minor bugfixes (v2 onion services):
2252 - For HSFETCH commands on v2 onion services addresses, check the
2253 length of bytes decoded, not the base32 length. Fixes bug 34400;
2254 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
2256 o Code simplification and refactoring:
2257 - Add and use a set of functions to perform down-casts on constant
2258 connection and channel pointers. Closes ticket 40046.
2259 - Refactor our code that logs descriptions of connections, channels,
2260 and the peers on them, to use a single call path. This change
2261 enables us to refactor the data types that they use, and eliminates
2262 many confusing usages of those types. Closes ticket 40041.
2263 - Refactor some common node selection code into a single function.
2264 Closes ticket 34200.
2265 - Remove the now-redundant 'outbuf_flushlen' field from our
2266 connection type. It was previously used for an older version of
2267 our rate-limiting logic. Closes ticket 33097.
2268 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
2269 instead, for consistency with other code. Closes ticket 18106.
2270 - Rename functions about "advertised" ports which are not in fact
2271 guaranteed to return the ports that have been advertised. Closes
2273 - Split implementation of several command line options from
2274 options_init_from_torrc into smaller isolated functions. Patch by
2275 Daniel Pinto. Closes ticket 40102.
2276 - When an extend cell is missing an IPv4 or IPv6 address, fill in
2277 the address from the extend info. This is similar to what was done
2278 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
2281 o Deprecated features:
2282 - The "non-builtin" argument to the "--dump-config" command is now
2283 deprecated. When it works, it behaves the same as "short", which
2284 you should use instead. Closes ticket 33398.
2287 - Replace URLs from our old bugtracker so that they refer to the new
2288 bugtracker and wiki. Closes ticket 40101.
2291 - We no longer ship or build a "tor.service" file for use with
2292 systemd. No distribution included this script unmodified, and we
2293 don't have the expertise ourselves to maintain this in a way that
2294 all the various systemd-based distributions can use. Closes
2296 - We no longer ship support for the Android logging API. Modern
2297 versions of Android can use the syslog API instead. Closes
2299 - The "optimistic data" feature is now always on; there is no longer
2300 an option to disable it from the torrc file or from the consensus
2301 directory. Closes part of 40139.
2302 - The "usecreatefast" network parameter is now removed; there is no
2303 longer an option for authorities to turn it off. Closes part
2307 - Add unit tests for bandwidth statistics manipulation functions.
2308 Closes ticket 33812. Patch by MrSquanchee.
2310 o Code simplification and refactoring (autoconf):
2311 - Remove autoconf checks for unused funcs and headers. Closes ticket
2312 31699; Patch by @bduszel
2314 o Code simplification and refactoring (maintainer scripts):
2315 - Disable by default the pre-commit hook. Use the environment
2316 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
2317 Furthermore, stop running practracker in the pre-commit hook and
2318 make check-local. Closes ticket 40019.
2320 o Code simplification and refactoring (relay address):
2321 - Most of IPv4 representation was using "uint32_t". It has now been
2322 moved to use the internal "tor_addr_t" interface instead. This is
2323 so we can properly integrate IPv6 along IPv4 with common
2324 interfaces. Closes ticket 40043.
2326 o Documentation (manual page):
2327 - Move them from doc/ to doc/man/. Closes ticket 40044.
2328 - Describe the status of the "Sandbox" option more accurately. It is
2329 no longer "experimental", but it _is_ dependent on kernel and libc
2330 versions. Closes ticket 23378.
2332 o Documentation (tracing):
2333 - Document in depth the circuit subsystem trace events in the new
2334 doc/tracing/EventsCircuit.md. Closes ticket 40036.
2337 Changes in version 0.4.4.5 - 2020-09-15
2338 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
2339 series improves our guard selection algorithms, adds v3 onion balance
2340 support, improves the amount of code that can be disabled when running
2341 without relay support, and includes numerous small bugfixes and
2342 enhancements. It also lays the ground for some IPv6 features that
2343 we'll be developing more in the next (0.4.5) series.
2345 Per our support policy, we support each stable release series for nine
2346 months after its first stable release, or three months after the first
2347 stable release of the next series: whichever is longer. This means
2348 that 0.4.4.x will be supported until around June 2021--or later, if
2349 0.4.5.x is later than anticipated.
2351 Note also that support for 0.4.2.x has just ended; support for 0.4.3
2352 will continue until Feb 15, 2021. We still plan to continue supporting
2353 0.3.5.x, our long-term stable series, until Feb 2022.
2355 Below are the changes since 0.4.4.4-rc. For a complete list of changes
2356 since 0.4.3.6, see the ReleaseNotes file.
2358 o Major bugfixes (onion services, DoS):
2359 - Correct handling of parameters for the onion service DoS defense.
2360 Previously, the consensus parameters for the onion service DoS
2361 defenses were overwriting the parameters set by the service
2362 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
2363 40109; bugfix on 0.4.2.1-alpha.
2365 o Major bugfixes (stats, onion services):
2366 - Fix a bug where we were undercounting the Tor network's total
2367 onion service traffic, by ignoring any traffic originating from
2368 clients. Now we count traffic from both clients and services.
2369 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
2371 o Minor features (control port):
2372 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
2373 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
2374 Closes ticket 40089. Patch by Neel Chauhan.
2376 o Minor features (denial-of-service memory limiter):
2377 - Allow the user to configure even lower values for the
2378 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
2379 when previously the minimum was 256 MB. On clients, there is no
2380 minimum. Relays and clients will both warn if the value is set so
2381 low that Tor is likely to stop working. Closes ticket 24308.
2383 o Minor features (tests):
2384 - Our "make check" target now runs the unit tests in 8 parallel
2385 chunks. Doing this speeds up hardened CI builds by more than a
2386 factor of two. Closes ticket 40098.
2388 o Minor bugfixes (guard selection algorithm):
2389 - Avoid needless guard-related warning when upgrading from 0.4.3 to
2390 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
2392 o Minor bugfixes (tests):
2393 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
2394 on its own. Previously, it would exit with an error. Fixes bug
2395 40099; bugfix on 0.2.8.1-alpha.
2398 Changes in version 0.4.4.3-alpha - 2020-07-27
2399 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
2400 including one affecting NSS users, and several affecting the Linux
2403 o Major features (fallback directory list):
2404 - Replace the 148 fallback directories originally included in Tor
2405 0.4.1.4-rc (of which around 105 are still functional) with a list
2406 of 144 fallbacks generated in July 2020. Closes ticket 40061.
2408 o Major bugfixes (NSS):
2409 - When running with NSS enabled, make sure that NSS knows to expect
2410 nonblocking sockets. Previously, we set our TCP sockets as
2411 nonblocking, but did not tell NSS, which in turn could lead to
2412 unexpected blocking behavior. Fixes bug 40035; bugfix
2415 o Minor bugfixes (linux seccomp2 sandbox):
2416 - Fix a regression on sandboxing rules for the openat() syscall. The
2417 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
2418 but broke with versions of glibc. We now choose a rule based on
2419 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
2421 - Makes the seccomp sandbox allow the correct syscall for opendir
2422 according to the running glibc version. This fixes crashes when
2423 reloading torrc with sandbox enabled when running on glibc 2.15 to
2424 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
2427 o Minor bugfixes (relay, usability):
2428 - Adjust the rules for when to warn about having too many
2429 connections to other relays. Previously we'd tolerate up to 1.5
2430 connections per relay on average. Now we tolerate more connections
2431 for directory authorities, and raise the number of total
2432 connections we need to see before we warn. Fixes bug 33880; bugfix
2436 - Replace most http:// URLs in our code and documentation with
2437 https:// URLs. (We have left unchanged the code in src/ext/, and
2438 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
2441 - Our "check-local" test target no longer tries to use the
2442 Coccinelle semantic patching tool parse all the C files. While it
2443 is a good idea to try to make sure Coccinelle works on our C
2444 before we run a Coccinelle patch, doing so on every test run has
2445 proven to be disruptive. You can still run this tool manually with
2446 "make check-cocci". Closes ticket 40030.
2449 Changes in version 0.3.5.11 - 2020-07-09
2450 Tor 0.3.5.11 backports fixes from later tor releases, including several
2451 usability, portability, and reliability fixes.
2453 This release also fixes TROVE-2020-001, a medium-severity denial of
2454 service vulnerability affecting all versions of Tor when compiled with
2455 the NSS encryption library. (This is not the default configuration.)
2456 Using this vulnerability, an attacker could cause an affected Tor
2457 instance to crash remotely. This issue is also tracked as CVE-2020-
2458 15572. Anybody running a version of Tor built with the NSS library
2459 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2462 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2463 - Fix a crash due to an out-of-bound memory access when Tor is
2464 compiled with NSS support. Fixes bug 33119; bugfix on
2465 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2468 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2469 - Fix a bug that was preventing DoS defenses from running on bridges
2470 with a pluggable transport. Previously, the DoS subsystem was not
2471 given the transport name of the client connection, thus failed to
2472 find the GeoIP cache entry for that client address. Fixes bug
2473 33491; bugfix on 0.3.3.2-alpha.
2475 o Minor features (testing, backport from 0.4.3.4-rc):
2476 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2477 variable to specify a list of space-separated test cases that
2478 should not be executed. We will use this to disable certain tests
2479 that are failing on Appveyor because of mismatched OpenSSL
2480 libraries. Part of ticket 33643.
2482 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2483 - Use the correct 64-bit printf format when compiling with MINGW on
2484 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2486 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2487 - Warn if the ContactInfo field is not set, and tell the relay
2488 operator that not having a ContactInfo field set might cause their
2489 relay to get rejected in the future. Fixes bug 33361; bugfix
2492 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2493 - Resume use of preemptively-built circuits when UseEntryGuards is set
2494 to 0. We accidentally disabled this feature with that config
2495 setting, leading to slower load times. Fixes bug 34303; bugfix
2498 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2499 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2500 style "/* falls through */" comments. Both Clang and GCC allow
2501 __attribute__((fallthrough)) instead, so that's what we're using
2502 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2504 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2505 - Fix a compiler warning on platforms with 32-bit time_t values.
2506 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2508 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2509 - When starting Tor any time after the first time in a process,
2510 register the thread in which it is running as the main thread.
2511 Previously, we only did this on Windows, which could lead to bugs
2512 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2515 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2516 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2517 if we are not running on Windows. Previously, non-Windows hosts
2518 would reject these line-endings in certain positions, making
2519 certain key files hard to move from one host to another. Fixes bug
2520 33032; bugfix on 0.3.5.1-alpha.
2522 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2523 - Downgrade a noisy log message that could occur naturally when
2524 receiving an extrainfo document that we no longer want. Fixes bug
2525 16016; bugfix on 0.2.6.3-alpha.
2527 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2528 - Remove a BUG() warning that would cause a stack trace if an onion
2529 service descriptor was freed while we were waiting for a
2530 rendezvous circuit to complete. Fixes bug 28992; bugfix
2533 o Testing (CI, backport from 0.4.3.4-rc):
2534 - In our Appveyor Windows CI, copy required DLLs to test and app
2535 directories, before running tor's tests. This ensures that tor.exe
2536 and test*.exe use the correct version of each DLL. This fix is not
2537 required, but we hope it will avoid DLL search issues in future.
2538 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2539 - On Appveyor, skip the crypto/openssl_version test, which is
2540 failing because of a mismatched library installation. Fix
2544 Changes in version 0.4.2.8 - 2020-07-09
2545 Tor 0.4.2.8 backports various fixes from later releases, including
2546 several that affect usability and portability.
2548 This release also fixes TROVE-2020-001, a medium-severity denial of
2549 service vulnerability affecting all versions of Tor when compiled with
2550 the NSS encryption library. (This is not the default configuration.)
2551 Using this vulnerability, an attacker could cause an affected Tor
2552 instance to crash remotely. This issue is also tracked as CVE-2020-
2553 15572. Anybody running a version of Tor built with the NSS library
2554 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2557 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2558 - Fix a crash due to an out-of-bound memory access when Tor is
2559 compiled with NSS support. Fixes bug 33119; bugfix on
2560 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2563 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
2564 - Fix a bug that was preventing DoS defenses from running on bridges
2565 with a pluggable transport. Previously, the DoS subsystem was not
2566 given the transport name of the client connection, thus failed to
2567 find the GeoIP cache entry for that client address. Fixes bug
2568 33491; bugfix on 0.3.3.2-alpha.
2570 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
2571 - Default to sending SENDME version 1 cells. (Clients are already
2572 sending these, because of a consensus parameter telling them to do
2573 so: this change only affects what clients would do if the
2574 consensus didn't contain a recommendation.) Closes ticket 33623.
2576 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
2577 - Improve assertions and add some memory-poisoning code to try to
2578 track down possible causes of a rare crash (32564) in the EWMA
2579 code. Closes ticket 33290.
2581 o Minor features (testing, backport from 0.4.3.4-rc):
2582 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2583 variable to specify a list of space-separated test cases that
2584 should not be executed. We will use this to disable certain tests
2585 that are failing on Appveyor because of mismatched OpenSSL
2586 libraries. Part of ticket 33643.
2588 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2589 - Use the correct 64-bit printf format when compiling with MINGW on
2590 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2592 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
2593 - Warn if the ContactInfo field is not set, and tell the relay
2594 operator that not having a ContactInfo field set might cause their
2595 relay to get rejected in the future. Fixes bug 33361; bugfix
2598 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2599 - Resume use of preemptively-built circuits when UseEntryGuards is set
2600 to 0. We accidentally disabled this feature with that config
2601 setting, leading to slower load times. Fixes bug 34303; bugfix
2604 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
2605 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2606 style "/* falls through */" comments. Both Clang and GCC allow
2607 __attribute__((fallthrough)) instead, so that's what we're using
2608 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2609 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2612 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2613 - Fix a compiler warning on platforms with 32-bit time_t values.
2614 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2616 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
2617 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
2618 report them as SIGNAL events. Previously we would log a bug
2619 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
2621 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
2622 - When starting Tor any time after the first time in a process,
2623 register the thread in which it is running as the main thread.
2624 Previously, we only did this on Windows, which could lead to bugs
2625 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
2628 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
2629 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2630 if we are not running on Windows. Previously, non-Windows hosts
2631 would reject these line-endings in certain positions, making
2632 certain key files hard to move from one host to another. Fixes bug
2633 33032; bugfix on 0.3.5.1-alpha.
2635 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
2636 - When logging a bug, do not say "Future instances of this warning
2637 will be silenced" unless we are actually going to silence them.
2638 Previously we would say this whenever a BUG() check failed in the
2639 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
2641 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
2642 - Flush stderr, stdout, and file logs during shutdown, if supported
2643 by the OS. This change helps make sure that any final logs are
2644 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2646 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2647 - Downgrade a noisy log message that could occur naturally when
2648 receiving an extrainfo document that we no longer want. Fixes bug
2649 16016; bugfix on 0.2.6.3-alpha.
2651 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
2652 - Remove a BUG() warning that would cause a stack trace if an onion
2653 service descriptor was freed while we were waiting for a
2654 rendezvous circuit to complete. Fixes bug 28992; bugfix
2657 o Testing (CI, backport from 0.4.3.4-rc):
2658 - In our Appveyor Windows CI, copy required DLLs to test and app
2659 directories, before running tor's tests. This ensures that tor.exe
2660 and test*.exe use the correct version of each DLL. This fix is not
2661 required, but we hope it will avoid DLL search issues in future.
2662 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2663 - On Appveyor, skip the crypto/openssl_version test, which is
2664 failing because of a mismatched library installation. Fix
2668 Changes in version 0.4.3.6 - 2020-07-09
2669 Tor 0.4.3.6 backports several bugfixes from later releases, including
2670 some affecting usability.
2672 This release also fixes TROVE-2020-001, a medium-severity denial of
2673 service vulnerability affecting all versions of Tor when compiled with
2674 the NSS encryption library. (This is not the default configuration.)
2675 Using this vulnerability, an attacker could cause an affected Tor
2676 instance to crash remotely. This issue is also tracked as CVE-2020-
2677 15572. Anybody running a version of Tor built with the NSS library
2678 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2681 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
2682 - Fix a crash due to an out-of-bound memory access when Tor is
2683 compiled with NSS support. Fixes bug 33119; bugfix on
2684 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2687 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
2688 - Use the correct 64-bit printf format when compiling with MINGW on
2689 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2691 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
2692 - Resume use of preemptively-built circuits when UseEntryGuards is set
2693 to 0. We accidentally disabled this feature with that config
2694 setting, leading to slower load times. Fixes bug 34303; bugfix
2697 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
2698 - Fix a compiler warning on platforms with 32-bit time_t values.
2699 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2701 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
2702 - Fix a startup crash when tor is compiled with --enable-nss and
2703 sandbox support is enabled. Fixes bug 34130; bugfix on
2704 0.3.5.1-alpha. Patch by Daniel Pinto.
2706 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
2707 - Downgrade a noisy log message that could occur naturally when
2708 receiving an extrainfo document that we no longer want. Fixes bug
2709 16016; bugfix on 0.2.6.3-alpha.
2711 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
2712 - Update the man page to reflect that MinUptimeHidServDirectoryV2
2713 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
2715 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
2716 - Prevent an assert() that would occur when cleaning the client
2717 descriptor cache, and attempting to close circuits for a non-
2718 decrypted descriptor (lacking client authorization). Fixes bug
2719 33458; bugfix on 0.4.2.1-alpha.
2721 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
2722 - Fix a portability error in the configure script, where we were
2723 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
2725 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
2726 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2727 descriptors, when the IPv6 port was configured as "auto". Fixes
2728 bug 32588; bugfix on 0.2.3.9-alpha.
2730 o Documentation (backport from 0.4.4.1-alpha):
2731 - Fix several doxygen warnings related to imbalanced groups. Closes
2735 Changes in version 0.4.4.2-alpha - 2020-07-09
2736 This is the second alpha release in the 0.4.4.x series. It fixes a few
2737 bugs in the previous release, and solves a few usability,
2738 compatibility, and portability issues.
2740 This release also fixes TROVE-2020-001, a medium-severity denial of
2741 service vulnerability affecting all versions of Tor when compiled with
2742 the NSS encryption library. (This is not the default configuration.)
2743 Using this vulnerability, an attacker could cause an affected Tor
2744 instance to crash remotely. This issue is also tracked as CVE-2020-
2745 15572. Anybody running a version of Tor built with the NSS library
2746 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
2749 o Major bugfixes (NSS, security):
2750 - Fix a crash due to an out-of-bound memory access when Tor is
2751 compiled with NSS support. Fixes bug 33119; bugfix on
2752 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
2755 o Minor features (bootstrap reporting):
2756 - Report more detailed reasons for bootstrap failure when the
2757 failure happens due to a TLS error. Previously we would just call
2758 these errors "MISC" when they happened during read, and "DONE"
2759 when they happened during any other TLS operation. Closes
2762 o Minor features (directory authority):
2763 - Authorities now recommend the protocol versions that are supported
2764 by Tor 0.3.5 and later. (Earlier versions of Tor have been
2765 deprecated since January of this year.) This recommendation will
2766 cause older clients and relays to give a warning on startup, or
2767 when they download a consensus directory. Closes ticket 32696.
2769 o Minor features (entry guards):
2770 - Reinstate support for GUARD NEW/UP/DOWN control port events.
2771 Closes ticket 40001.
2773 o Minor features (linux seccomp2 sandbox, portability):
2774 - Allow Tor to build on platforms where it doesn't know how to
2775 report which syscall caused the linux seccomp2 sandbox to fail.
2776 This change should make the sandbox code more portable to less
2777 common Linux architectures. Closes ticket 34382.
2778 - Permit the unlinkat() syscall, which some Libc implementations use
2779 to implement unlink(). Closes ticket 33346.
2781 o Minor bugfix (CI, Windows):
2782 - Use the correct 64-bit printf format when compiling with MINGW on
2783 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
2785 o Minor bugfix (onion service v3 client):
2786 - Remove a BUG() warning that could occur naturally. Fixes bug
2787 34087; bugfix on 0.3.2.1-alpha.
2789 o Minor bugfix (SOCKS, onion service client):
2790 - Detect v3 onion service addresses of the wrong length when
2791 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
2794 o Minor bugfixes (compiler warnings):
2795 - Fix a compiler warning on platforms with 32-bit time_t values.
2796 Fixes bug 40028; bugfix on 0.3.2.8-rc.
2798 o Minor bugfixes (control port, onion service):
2799 - Consistently use 'address' in "Invalid v3 address" response to
2800 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
2801 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
2803 o Minor bugfixes (logging):
2804 - Downgrade a noisy log message that could occur naturally when
2805 receiving an extrainfo document that we no longer want. Fixes bug
2806 16016; bugfix on 0.2.6.3-alpha.
2808 o Minor bugfixes (onion services v3):
2809 - Avoid a non-fatal assertion failure in certain edge-cases when
2810 opening an intro circuit as a client. Fixes bug 34084; bugfix
2813 o Deprecated features (onion service v2):
2814 - Add a deprecation warning for version 2 onion services. Closes
2817 o Removed features (IPv6, revert):
2818 - Revert the change in the default value of ClientPreferIPv6OrPort:
2819 it breaks the torsocks use case. The SOCKS resolve command has no
2820 mechanism to ask for a specific address family (v4 or v6), and so
2821 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
2822 interface resulted in a failure. Tor Browser explicitly sets
2823 PreferIPv6, so this should not affect the majority of our users.
2824 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
2827 Changes in version 0.4.4.1-alpha - 2020-06-16
2828 This is the first alpha release in the 0.4.4.x series. It improves
2829 our guard selection algorithms, improves the amount of code that
2830 can be disabled when running without relay support, and includes numerous
2831 small bugfixes and enhancements. It also lays the ground for some IPv6
2832 features that we'll be developing more in the next (0.4.5) series.
2834 Here are the changes since 0.4.3.5.
2836 o Major features (Proposal 310, performance + security):
2837 - Implements Proposal 310, "Bandaid on guard selection". Proposal
2838 310 solves load-balancing issues with older versions of the guard
2839 selection algorithm, and improves its security. Under this new
2840 algorithm, a newly selected guard never becomes Primary unless all
2841 previously sampled guards are unreachable. Implements
2842 recommendation from 32088. (Proposal 310 is linked to the CLAPS
2843 project researching optimal client location-aware path selections.
2844 This project is a collaboration between the UCLouvain Crypto Group,
2845 the U.S. Naval Research Laboratory, and Princeton University.)
2847 o Major features (IPv6, relay):
2848 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
2849 warning if the IPv4 or IPv6 address is an internal address, and
2850 internal addresses are not allowed. But continue to use the other
2851 address, if it is valid. Closes ticket 33817.
2852 - If a relay can extend over IPv4 and IPv6, and both addresses are
2853 provided, it chooses between them uniformly at random. Closes
2855 - Re-use existing IPv6 connections for circuit extends. Closes
2857 - Relays may extend circuits over IPv6, if the relay has an IPv6
2858 ORPort, and the client supplies the other relay's IPv6 ORPort in
2859 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
2860 ORPort self-tests in 33222. Closes ticket 33817.
2862 o Major features (v3 onion services):
2863 - Allow v3 onion services to act as OnionBalance backend instances,
2864 by using the HiddenServiceOnionBalanceInstance torrc option.
2865 Closes ticket 32709.
2867 o Minor feature (developer tools):
2868 - Add a script to help check the alphabetical ordering of option
2869 names in the manual page. Closes ticket 33339.
2871 o Minor feature (onion service client, SOCKS5):
2872 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
2873 new type of onion service connection failures. The semantics of
2874 these error codes are documented in proposal 309. Closes
2877 o Minor feature (onion service v3):
2878 - If a service cannot upload its descriptor(s), log why at INFO
2879 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
2881 o Minor feature (python scripts):
2882 - Stop assuming that /usr/bin/python exists. Instead of using a
2883 hardcoded path in scripts that still use Python 2, use
2884 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
2885 bug 33192; bugfix on 0.4.2.
2887 o Minor features (client-only compilation):
2888 - Disable more code related to the ext_orport protocol when
2889 compiling without support for relay mode. Closes ticket 33368.
2890 - Disable more of our self-testing code when support for relay mode
2891 is disabled. Closes ticket 33370.
2893 o Minor features (code safety):
2894 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
2895 functions in DNS and IP address processing code, and adjust
2896 codepaths to make them less likely to crash entire Tor instances.
2897 Resolves issue 33788.
2899 o Minor features (compilation size):
2900 - Most server-side DNS code is now disabled when building without
2901 support for relay mode. Closes ticket 33366.
2903 o Minor features (continuous integration):
2904 - Run unit-test and integration test (Stem, Chutney) jobs with
2905 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
2906 Resolves ticket 32143.
2908 o Minor features (control port):
2909 - Return a descriptive error message from the 'GETINFO status/fresh-
2910 relay-descs' command on the control port. Previously, we returned
2911 a generic error of "Error generating descriptor". Closes ticket
2912 32873. Patch by Neel Chauhan.
2914 o Minor features (developer tooling):
2915 - Refrain from listing all .a files that are generated by the Tor
2916 build in .gitignore. Add a single wildcard *.a entry that covers
2917 all of them for present and future. Closes ticket 33642.
2918 - Add a script ("git-install-tools.sh") to install git hooks and
2919 helper scripts. Closes ticket 33451.
2921 o Minor features (directory authority, shared random):
2922 - Refactor more authority-only parts of the shared-random scheduling
2923 code to reside in the dirauth module, and to be disabled when
2924 compiling with --disable-module-dirauth. Closes ticket 33436.
2926 o Minor features (directory):
2927 - Remember the number of bytes we have downloaded for each directory
2928 purpose while bootstrapping, and while fully bootstrapped. Log
2929 this information as part of the heartbeat message. Closes
2932 o Minor features (IPv6 support):
2933 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
2934 changes and tor_addr_is_null(). Closes ticket 33679. Patch
2936 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
2937 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
2938 Closes ticket 33901.
2940 o Minor features (logging):
2941 - When trying to find our own address, add debug-level logging to
2942 report the sources of candidate addresses. Closes ticket 32888.
2944 o Minor features (testing, architecture):
2945 - Our test scripts now double-check that subsystem initialization
2946 order is consistent with the inter-module dependencies established
2947 by our .may_include files. Implements ticket 31634.
2948 - Initialize all subsystems at the beginning of our unit test
2949 harness, to avoid crashes due to uninitialized subsystems. Follow-
2950 up from ticket 33316.
2952 o Minor features (v3 onion services):
2953 - Add v3 onion service status to the dumpstats() call which is
2954 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
2955 services. Closes ticket 24844. Patch by Neel Chauhan.
2957 o Minor features (windows):
2958 - Add support for console control signals like Ctrl+C in Windows.
2959 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
2961 o Minor bugfix (onion service v3):
2962 - Prevent an assert() that would occur when cleaning the client
2963 descriptor cache, and attempting to close circuits for a non-
2964 decrypted descriptor (lacking client authorization). Fixes bug
2965 33458; bugfix on 0.4.2.1-alpha.
2967 o Minor bugfix (refactoring):
2968 - Lift circuit_build_times_disabled() out of the
2969 circuit_expire_building() loop, to save CPU time when there are
2970 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
2972 o Minor bugfixes (client performance):
2973 - Resume use of preemptively-built circuits when UseEntryGuards is set
2974 to 0. We accidentally disabled this feature with that config
2975 setting, leading to slower load times. Fixes bug 34303; bugfix
2978 o Minor bugfixes (directory authorities):
2979 - Directory authorities now reject votes that arrive too late. In
2980 particular, once an authority has started fetching missing votes,
2981 it no longer accepts new votes posted by other authorities. This
2982 change helps prevent a consensus split, where only some authorities
2983 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
2985 o Minor bugfixes (git scripts):
2986 - Stop executing the checked-out pre-commit hook from the pre-push
2987 hook. Instead, execute the copy in the user's git directory. Fixes
2988 bug 33284; bugfix on 0.4.1.1-alpha.
2990 o Minor bugfixes (initialization):
2991 - Initialize the subsystems in our code in an order more closely
2992 corresponding to their dependencies, so that every system is
2993 initialized before the ones that (theoretically) depend on it.
2994 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
2996 o Minor bugfixes (IPv4, relay):
2997 - Check for invalid zero IPv4 addresses and ports when sending and
2998 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
3000 o Minor bugfixes (IPv6, relay):
3001 - Consider IPv6 addresses when checking if a connection is
3002 canonical. In 17604, relays assumed that a remote relay could
3003 consider an IPv6 connection canonical, but did not set the
3004 canonical flag on their side of the connection. Fixes bug 33899;
3005 bugfix on 0.3.1.1-alpha.
3006 - Log IPv6 addresses on connections where this relay is the
3007 responder. Previously, responding relays would replace the remote
3008 IPv6 address with the IPv4 address from the consensus. Fixes bug
3009 33899; bugfix on 0.3.1.1-alpha.
3011 o Minor bugfixes (linux seccomp sandbox nss):
3012 - Fix a startup crash when tor is compiled with --enable-nss and
3013 sandbox support is enabled. Fixes bug 34130; bugfix on
3014 0.3.5.1-alpha. Patch by Daniel Pinto.
3016 o Minor bugfixes (logging, testing):
3017 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
3018 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
3019 used to log a non-fatal warning, regardless of the debugging
3020 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
3022 o Minor bugfixes (logs):
3023 - Remove surprising empty line in the INFO-level log about circuit
3024 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
3026 o Minor bugfixes (mainloop):
3027 - Better guard against growing a buffer past its maximum 2GB in
3028 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
3030 o Minor bugfixes (manual page):
3031 - Update the man page to reflect that MinUptimeHidServDirectoryV2
3032 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
3034 o Minor bugfixes (onion service v3, client):
3035 - Remove a BUG() that was causing a stacktrace when a descriptor
3036 changed at an unexpected time. Fixes bug 28992; bugfix
3039 o Minor bugfixes (onion service, logging):
3040 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
3041 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
3043 o Minor bugfixes (portability):
3044 - Fix a portability error in the configure script, where we were
3045 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
3047 o Minor bugfixes (protocol versions):
3048 - Sort tor's supported protocol version lists, as recommended by the
3049 tor directory specification. Fixes bug 33285; bugfix
3052 o Minor bugfixes (relays):
3053 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
3054 descriptors, when the IPv6 port was configured as "auto". Fixes
3055 bug 32588; bugfix on 0.2.3.9-alpha.
3057 o Code simplification and refactoring:
3058 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
3059 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
3060 brackets, separating colon, and port number. Closes ticket 33956.
3061 Patch by Neel Chauhan.
3062 - Merge the orconn and ocirc events into the "core" subsystem, which
3063 manages or connections and origin circuits. Previously they were
3064 isolated in subsystems of their own.
3065 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
3066 inversion. Closes ticket 33633.
3067 - Move the circuit extend code to the relay module. Split the
3068 circuit extend function into smaller functions. Closes
3070 - Rewrite port_parse_config() to use the default port flags from
3071 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
3072 - Updated comments in 'scheduler.c' to reflect old code changes, and
3073 simplified the scheduler channel state change code. Closes
3077 - Document the limitations of using %include on config files with
3078 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
3079 0.3.1.1-alpha. Patch by Daniel Pinto.
3080 - Fix several doxygen warnings related to imbalanced groups. Closes
3084 - Remove the ClientAutoIPv6ORPort option. This option attempted to
3085 randomly choose between IPv4 and IPv6 for client connections, and
3086 wasn't a true implementation of Happy Eyeballs. Often, this option
3087 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
3088 Patch by Neel Chauhan.
3089 - Stop shipping contrib/dist/rc.subr file, as it is not being used
3090 on FreeBSD anymore. Closes issue 31576.
3093 - Add a basic IPv6 test to "make test-network". This test only runs
3094 when the local machine has an IPv6 stack. Closes ticket 33300.
3095 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
3096 These jobs run the IPv4-only and dual-stack chutney flavours from
3097 test-network-all. Closes ticket 33280.
3098 - Remove a redundant distcheck job. Closes ticket 33194.
3099 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
3100 chutney job. This job runs on macOS, so it's a bit slow. Closes
3102 - Sort the Travis jobs in order of speed. Putting the slowest jobs
3103 first takes full advantage of Travis job concurrency. Closes
3105 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3106 previously configured to fast_finish (which requires
3107 allow_failure), to speed up the build. Closes ticket 33195.
3108 - Test v3 onion services to tor's mixed IPv4 chutney network. And
3109 add a mixed IPv6 chutney network. These networks are used in the
3110 test-network-all, test-network-ipv4, and test-network-ipv6 make
3111 targets. Closes ticket 33334.
3112 - Use the "bridges+hs-v23" chutney network flavour in "make test-
3113 network". This test requires a recent version of chutney (mid-
3114 February 2020). Closes ticket 28208.
3115 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3116 tool to produce detailed diagnostic output. Closes ticket 32792.
3118 o Code simplification and refactoring (onion service):
3119 - Refactor configuration parsing to use the new config subsystem
3120 code. Closes ticket 33014.
3122 o Code simplification and refactoring (relay address):
3123 - Move a series of functions related to address resolving into their
3124 own files. Closes ticket 33789.
3126 o Documentation (manual page):
3127 - Add cross reference links and a table of contents to the HTML tor
3128 manual page. Closes ticket 33369. Work by Swati Thacker as part of
3129 Google Season of Docs.
3130 - Alphabetize the Denial of Service Mitigation Options, Directory
3131 Authority Server Options, Hidden Service Options, and Testing
3132 Network Options sections of the tor(1) manual page. Closes ticket
3133 33275. Work by Swati Thacker as part of Google Season of Docs.
3134 - Refrain from mentioning nicknames in manpage section for MyFamily
3135 torrc option. Resolves issue 33417.
3136 - Updated the options set by TestingTorNetwork in the manual page.
3137 Closes ticket 33778.
3140 Changes in version 0.4.3.5 - 2020-05-15
3141 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
3142 series adds support for building without relay code enabled, and
3143 implements functionality needed for OnionBalance with v3 onion
3144 services. It includes significant refactoring of our configuration and
3145 controller functionality, and fixes numerous smaller bugs and
3148 Per our support policy, we support each stable release series for nine
3149 months after its first stable release, or three months after the first
3150 stable release of the next series: whichever is longer. This means
3151 that 0.4.3.x will be supported until around February 2021--later, if
3152 0.4.4.x is later than anticipated.
3154 Note also that support for 0.4.1.x is about to end on May 20 of this
3155 year; 0.4.2.x will be supported until September 15. We still plan to
3156 continue supporting 0.3.5.x, our long-term stable series, until
3159 Below are the changes since 0.4.3.4-rc. For a complete list of changes
3160 since 0.4.2.6, see the ReleaseNotes file.
3162 o Minor bugfixes (compiler compatibility):
3163 - Avoid compiler warnings from Clang 10 related to the use of GCC-
3164 style "/* falls through */" comments. Both Clang and GCC allow
3165 __attribute__((fallthrough)) instead, so that's what we're using
3166 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
3167 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
3170 o Minor bugfixes (logging):
3171 - Stop truncating IPv6 addresses and ports in channel and connection
3172 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
3173 - Fix a logic error in a log message about whether an address was
3174 invalid. Previously, the code would never report that onion
3175 addresses were onion addresses. Fixes bug 34131; bugfix
3179 Changes in version 0.4.3.4-rc - 2020-04-13
3180 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
3181 several bugs from earlier versions, including one affecting DoS
3182 defenses on bridges using pluggable transports.
3184 o Major bugfixes (DoS defenses, bridges, pluggable transport):
3185 - Fix a bug that was preventing DoS defenses from running on bridges
3186 with a pluggable transport. Previously, the DoS subsystem was not
3187 given the transport name of the client connection, thus failed to
3188 find the GeoIP cache entry for that client address. Fixes bug
3189 33491; bugfix on 0.3.3.2-alpha.
3191 o Minor feature (sendme, flow control):
3192 - Default to sending SENDME version 1 cells. (Clients are already
3193 sending these, because of a consensus parameter telling them to do
3194 so: this change only affects what clients would do if the
3195 consensus didn't contain a recommendation.) Closes ticket 33623.
3197 o Minor features (testing):
3198 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
3199 variable to specify a list of space-separated test cases that
3200 should not be executed. We will use this to disable certain tests
3201 that are failing on Appveyor because of mismatched OpenSSL
3202 libraries. Part of ticket 33643.
3204 o Minor bugfixes (--disable-module-relay):
3205 - Fix an assertion failure when Tor is built without the relay
3206 module, and then invoked with the "User" option. Fixes bug 33668;
3207 bugfix on 0.4.3.1-alpha.
3209 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
3210 - Set some output arguments in the relay and dirauth module stubs,
3211 to guard against future stub argument handling bugs like 33668.
3212 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
3214 o Minor bugfixes (build system):
3215 - Correctly output the enabled module in the configure summary.
3216 Before that, the list shown was just plain wrong. Fixes bug 33646;
3217 bugfix on 0.4.3.2-alpha.
3219 o Minor bugfixes (client, IPv6):
3220 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
3221 Instead, prefer IPv6 connections by default, but allow users to
3222 change their configs using the "NoPreferIPv6" port flag. Fixes bug
3223 33608; bugfix on 0.4.3.1-alpha.
3224 - Revert PreferIPv6 set by default on the SocksPort because it broke
3225 the torsocks use case. Tor doesn't have a way for an application
3226 to request the hostname to be resolved for a specific IP version,
3227 but torsocks requires that. Up until now, IPv4 was used by default
3228 so torsocks is expecting that, and can't handle a possible IPv6
3229 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
3231 o Minor bugfixes (key portability):
3232 - When reading PEM-encoded key data, tolerate CRLF line-endings even
3233 if we are not running on Windows. Previously, non-Windows hosts
3234 would reject these line-endings in certain positions, making
3235 certain key files hard to move from one host to another. Fixes bug
3236 33032; bugfix on 0.3.5.1-alpha.
3238 o Minor bugfixes (logging):
3239 - Flush stderr, stdout, and file logs during shutdown, if supported
3240 by the OS. This change helps make sure that any final logs are
3241 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
3242 - Stop closing stderr and stdout during shutdown. Closing these file
3243 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
3246 o Minor bugfixes (onion services v3):
3247 - Relax severity of a log message that can appear naturally when
3248 decoding onion service descriptors as a relay. Also add some
3249 diagnostics to debug any future bugs in that area. Fixes bug
3250 31669; bugfix on 0.3.0.1-alpha.
3251 - Block a client-side assertion by disallowing the registration of
3252 an x25519 client auth key that's all zeroes. Fixes bug 33545;
3253 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
3255 o Code simplification and refactoring:
3256 - Disable our coding standards best practices tracker in our git
3257 hooks. (0.4.3 branches only.) Closes ticket 33678.
3260 - Avoid conflicts between the fake sockets in tor's unit tests, and
3261 real file descriptors. Resolves issues running unit tests with
3262 GitHub Actions, where the process that embeds or launches the
3263 tests has already opened a large number of file descriptors. Fixes
3264 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
3268 - In our Appveyor Windows CI, copy required DLLs to test and app
3269 directories, before running tor's tests. This ensures that tor.exe
3270 and test*.exe use the correct version of each DLL. This fix is not
3271 required, but we hope it will avoid DLL search issues in future.
3272 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
3273 - On Appveyor, skip the crypto/openssl_version test, which is
3274 failing because of a mismatched library installation. Fix
3278 Changes in version 0.4.3.3-alpha - 2020-03-18
3279 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
3280 TROVE-2020-002, a major denial-of-service vulnerability that affected
3281 all released Tor instances since 0.2.1.5-alpha. Using this
3282 vulnerability, an attacker could cause Tor instances to consume a huge
3283 amount of CPU, disrupting their operations for several seconds or
3284 minutes. This attack could be launched by anybody against a relay, or
3285 by a directory cache against any client that had connected to it. The
3286 attacker could launch this attack as much as they wanted, thereby
3287 disrupting service or creating patterns that could aid in traffic
3288 analysis. This issue was found by OSS-Fuzz, and is also tracked
3291 We do not have reason to believe that this attack is currently being
3292 exploited in the wild, but nonetheless we advise everyone to upgrade
3293 as soon as packages are available.
3295 o Major bugfixes (security, denial-of-service):
3296 - Fix a denial-of-service bug that could be used by anyone to
3297 consume a bunch of CPU on any Tor relay or authority, or by
3298 directories to consume a bunch of CPU on clients or hidden
3299 services. Because of the potential for CPU consumption to
3300 introduce observable timing patterns, we are treating this as a
3301 high-severity security issue. Fixes bug 33119; bugfix on
3302 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3303 as TROVE-2020-002 and CVE-2020-10592.
3305 o Major bugfixes (circuit padding, memory leak):
3306 - Avoid a remotely triggered memory leak in the case that a circuit
3307 padding machine is somehow negotiated twice on the same circuit.
3308 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3309 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3311 o Major bugfixes (directory authority):
3312 - Directory authorities will now send a 503 (not enough bandwidth)
3313 code to clients when under bandwidth pressure. Known relays and
3314 other authorities will always be answered regardless of the
3315 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3317 o Minor features (diagnostic):
3318 - Improve assertions and add some memory-poisoning code to try to
3319 track down possible causes of a rare crash (32564) in the EWMA
3320 code. Closes ticket 33290.
3322 o Minor features (directory authorities):
3323 - Directory authorities now reject descriptors from relays running
3324 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
3325 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
3327 o Minor features (usability):
3328 - Include more information when failing to parse a configuration
3329 value. This should make it easier to tell what's going wrong when
3330 a configuration file doesn't parse. Closes ticket 33460.
3332 o Minor bugfix (relay, configuration):
3333 - Warn if the ContactInfo field is not set, and tell the relay
3334 operator that not having a ContactInfo field set might cause their
3335 relay to get rejected in the future. Fixes bug 33361; bugfix
3338 o Minor bugfixes (coding best practices checks):
3339 - Allow the "practracker" script to read unicode files when using
3340 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
3341 but didn't change the codec for opening files. Fixes bug 33374;
3342 bugfix on 0.4.3.1-alpha.
3344 o Minor bugfixes (continuous integration):
3345 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
3348 o Minor bugfixes (onion service v3, client):
3349 - Remove a BUG() warning that would cause a stack trace if an onion
3350 service descriptor was freed while we were waiting for a
3351 rendezvous circuit to complete. Fixes bug 28992; bugfix
3354 o Minor bugfixes (onion services v3):
3355 - Fix an assertion failure that could result from a corrupted
3356 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3357 bugfix on 0.3.3.1-alpha. This issue is also tracked
3360 o Documentation (manpage):
3361 - Alphabetize the Server and Directory server sections of the tor
3362 manpage. Also split Statistics options into their own section of
3363 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
3364 Google Season of Docs.
3365 - Document the __OwningControllerProcess torrc option and specify
3366 its polling interval. Resolves issue 32971.
3368 o Testing (Travis CI):
3369 - Remove a redundant distcheck job. Closes ticket 33194.
3370 - Sort the Travis jobs in order of speed: putting the slowest jobs
3371 first takes full advantage of Travis job concurrency. Closes
3373 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3374 previously configured to fast_finish (which requires
3375 allow_failure), to speed up the build. Closes ticket 33195.
3376 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3377 tool to produce detailed diagnostic output. Closes ticket 32792.
3380 Changes in version 0.4.2.7 - 2020-03-18
3381 This is the third stable release in the 0.4.2.x series. It backports
3382 numerous fixes from later releases, including a fix for TROVE-2020-
3383 002, a major denial-of-service vulnerability that affected all
3384 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
3385 an attacker could cause Tor instances to consume a huge amount of CPU,
3386 disrupting their operations for several seconds or minutes. This
3387 attack could be launched by anybody against a relay, or by a directory
3388 cache against any client that had connected to it. The attacker could
3389 launch this attack as much as they wanted, thereby disrupting service
3390 or creating patterns that could aid in traffic analysis. This issue
3391 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
3393 We do not have reason to believe that this attack is currently being
3394 exploited in the wild, but nonetheless we advise everyone to upgrade
3395 as soon as packages are available.
3397 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3398 - Fix a denial-of-service bug that could be used by anyone to
3399 consume a bunch of CPU on any Tor relay or authority, or by
3400 directories to consume a bunch of CPU on clients or hidden
3401 services. Because of the potential for CPU consumption to
3402 introduce observable timing patterns, we are treating this as a
3403 high-severity security issue. Fixes bug 33119; bugfix on
3404 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3405 as TROVE-2020-002 and CVE-2020-10592.
3407 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3408 - Avoid a remotely triggered memory leak in the case that a circuit
3409 padding machine is somehow negotiated twice on the same circuit.
3410 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3411 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3413 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
3414 - Directory authorities will now send a 503 (not enough bandwidth)
3415 code to clients when under bandwidth pressure. Known relays and
3416 other authorities will always be answered regardless of the
3417 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
3419 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3420 - Stop allowing failures on the Travis CI stem tests job. It looks
3421 like all the stem hangs we were seeing before are now fixed.
3422 Closes ticket 33075.
3424 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3425 - Lowercase the configured value of BridgeDistribution before adding
3426 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3428 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3429 - If we encounter a bug when flushing a buffer to a TLS connection,
3430 only log the bug once per invocation of the Tor process.
3431 Previously we would log with every occurrence, which could cause
3432 us to run out of disk space. Fixes bug 33093; bugfix
3435 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3436 - Fix an assertion failure that could result from a corrupted
3437 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3438 bugfix on 0.3.3.1-alpha. This issue is also tracked
3441 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3442 - Fix a syntax warning given by newer versions of Rust that was
3443 creating problems for our continuous integration. Fixes bug 33212;
3444 bugfix on 0.3.5.1-alpha.
3446 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3447 - Remove a redundant distcheck job. Closes ticket 33194.
3448 - Sort the Travis jobs in order of speed: putting the slowest jobs
3449 first takes full advantage of Travis job concurrency. Closes
3451 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3452 previously configured to fast_finish (which requires
3453 allow_failure), to speed up the build. Closes ticket 33195.
3454 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3455 tool to produce detailed diagnostic output. Closes ticket 32792.
3458 Changes in version 0.4.1.9 - 2020-03-18
3459 Tor 0.4.1.9 backports important fixes from later Tor releases,
3460 including a fix for TROVE-2020-002, a major denial-of-service
3461 vulnerability that affected all released Tor instances since
3462 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
3463 instances to consume a huge amount of CPU, disrupting their operations
3464 for several seconds or minutes. This attack could be launched by
3465 anybody against a relay, or by a directory cache against any client
3466 that had connected to it. The attacker could launch this attack as
3467 much as they wanted, thereby disrupting service or creating patterns
3468 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
3469 and is also tracked as CVE-2020-10592.
3471 We do not have reason to believe that this attack is currently being
3472 exploited in the wild, but nonetheless we advise everyone to upgrade
3473 as soon as packages are available.
3475 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3476 - Fix a denial-of-service bug that could be used by anyone to
3477 consume a bunch of CPU on any Tor relay or authority, or by
3478 directories to consume a bunch of CPU on clients or hidden
3479 services. Because of the potential for CPU consumption to
3480 introduce observable timing patterns, we are treating this as a
3481 high-severity security issue. Fixes bug 33119; bugfix on
3482 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3483 as TROVE-2020-002 and CVE-2020-10592.
3485 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
3486 - Avoid a remotely triggered memory leak in the case that a circuit
3487 padding machine is somehow negotiated twice on the same circuit.
3488 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
3489 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
3491 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3492 - Lowercase the configured value of BridgeDistribution before adding
3493 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3495 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3496 - If we encounter a bug when flushing a buffer to a TLS connection,
3497 only log the bug once per invocation of the Tor process.
3498 Previously we would log with every occurrence, which could cause
3499 us to run out of disk space. Fixes bug 33093; bugfix
3502 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3503 - Fix an assertion failure that could result from a corrupted
3504 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3505 bugfix on 0.3.3.1-alpha. This issue is also tracked
3508 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3509 - Fix a syntax warning given by newer versions of Rust that was
3510 creating problems for our continuous integration. Fixes bug 33212;
3511 bugfix on 0.3.5.1-alpha.
3513 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3514 - Remove a redundant distcheck job. Closes ticket 33194.
3515 - Sort the Travis jobs in order of speed: putting the slowest jobs
3516 first takes full advantage of Travis job concurrency. Closes
3518 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3519 previously configured to fast_finish (which requires
3520 allow_failure), to speed up the build. Closes ticket 33195.
3521 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3522 tool to produce detailed diagnostic output. Closes ticket 32792.
3525 Changes in version 0.3.5.10 - 2020-03-18
3526 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
3527 fix for TROVE-2020-002, a major denial-of-service vulnerability that
3528 affected all released Tor instances since 0.2.1.5-alpha. Using this
3529 vulnerability, an attacker could cause Tor instances to consume a huge
3530 amount of CPU, disrupting their operations for several seconds or
3531 minutes. This attack could be launched by anybody against a relay, or
3532 by a directory cache against any client that had connected to it. The
3533 attacker could launch this attack as much as they wanted, thereby
3534 disrupting service or creating patterns that could aid in traffic
3535 analysis. This issue was found by OSS-Fuzz, and is also tracked
3538 We do not have reason to believe that this attack is currently being
3539 exploited in the wild, but nonetheless we advise everyone to upgrade
3540 as soon as packages are available.
3542 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
3543 - Fix a denial-of-service bug that could be used by anyone to
3544 consume a bunch of CPU on any Tor relay or authority, or by
3545 directories to consume a bunch of CPU on clients or hidden
3546 services. Because of the potential for CPU consumption to
3547 introduce observable timing patterns, we are treating this as a
3548 high-severity security issue. Fixes bug 33119; bugfix on
3549 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
3550 as TROVE-2020-002 and CVE-2020-10592.
3552 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3553 - Correct how we use libseccomp. Particularly, stop assuming that
3554 rules are applied in a particular order or that more rules are
3555 processed after the first match. Neither is the case! In
3556 libseccomp <2.4.0 this lead to some rules having no effect.
3557 libseccomp 2.4.0 changed how rules are generated, leading to a
3558 different ordering, which in turn led to a fatal crash during
3559 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3562 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
3563 - Stop allowing failures on the Travis CI stem tests job. It looks
3564 like all the stem hangs we were seeing before are now fixed.
3565 Closes ticket 33075.
3567 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
3568 - Lowercase the configured value of BridgeDistribution before adding
3569 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3571 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
3572 - When running Tor with an option like --verify-config or
3573 --dump-config that does not start the event loop, avoid crashing
3574 if we try to exit early because of an error. Fixes bug 32407;
3575 bugfix on 0.3.3.1-alpha.
3577 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
3578 - If we encounter a bug when flushing a buffer to a TLS connection,
3579 only log the bug once per invocation of the Tor process.
3580 Previously we would log with every occurrence, which could cause
3581 us to run out of disk space. Fixes bug 33093; bugfix
3584 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
3585 - Fix an assertion failure that could result from a corrupted
3586 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
3587 bugfix on 0.3.3.1-alpha. This issue is also tracked
3590 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
3591 - Fix a syntax warning given by newer versions of Rust that was
3592 creating problems for our continuous integration. Fixes bug 33212;
3593 bugfix on 0.3.5.1-alpha.
3595 o Testing (backport from 0.4.3.1-alpha):
3596 - Re-enable the Travis CI macOS Chutney build, but don't let it
3597 prevent the Travis job from finishing. (The Travis macOS jobs are
3598 slow, so we don't want to have it delay the whole CI process.)
3599 Closes ticket 32629.
3600 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3601 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3602 fix the sandbox errors in 32722. Closes ticket 32240.
3604 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3605 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3607 o Testing (Travis CI, backport from 0.4.3.3-alpha):
3608 - Remove a redundant distcheck job. Closes ticket 33194.
3609 - Sort the Travis jobs in order of speed: putting the slowest jobs
3610 first takes full advantage of Travis job concurrency. Closes
3612 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
3613 previously configured to fast_finish (which requires
3614 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
3615 tool to produce detailed diagnostic output. Closes ticket 32792.
3618 Changes in version 0.4.3.2-alpha - 2020-02-10
3619 This is the second stable alpha release in the Tor 0.4.3.x series. It
3620 fixes several bugs present in the previous alpha release. Anybody
3621 running the previous alpha should upgrade, and look for bugs in this
3624 o Major bugfixes (onion service client, authorization):
3625 - On a NEWNYM signal, purge entries from the ephemeral client
3626 authorization cache. The permanent ones are kept. Fixes bug 33139;
3627 bugfix on 0.4.3.1-alpha.
3629 o Minor features (best practices tracker):
3630 - Practracker now supports a --regen-overbroad option to regenerate
3631 the exceptions file, but only to revise exceptions to be _less_
3632 tolerant of best-practices violations. Closes ticket 32372.
3634 o Minor features (continuous integration):
3635 - Run Doxygen Makefile target on Travis, so we can learn about
3636 regressions in our internal documentation. Closes ticket 32455.
3637 - Stop allowing failures on the Travis CI stem tests job. It looks
3638 like all the stem hangs we were seeing before are now fixed.
3639 Closes ticket 33075.
3641 o Minor bugfixes (build system):
3642 - Revise configure options that were either missing or incorrect in
3643 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
3645 o Minor bugfixes (controller protocol):
3646 - Fix a memory leak introduced by refactoring of control reply
3647 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
3648 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
3650 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
3651 report them as SIGNAL events. Previously we would log a bug
3652 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
3654 o Minor bugfixes (logging):
3655 - If we encounter a bug when flushing a buffer to a TLS connection,
3656 only log the bug once per invocation of the Tor process.
3657 Previously we would log with every occurrence, which could cause
3658 us to run out of disk space. Fixes bug 33093; bugfix
3660 - When logging a bug, do not say "Future instances of this warning
3661 will be silenced" unless we are actually going to silence them.
3662 Previously we would say this whenever a BUG() check failed in the
3663 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
3665 o Minor bugfixes (onion service v2):
3666 - Move a series of v2 onion service warnings to protocol-warning
3667 level because they can all be triggered remotely by a malformed
3668 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
3670 o Minor bugfixes (onion service v3, client authorization):
3671 - When removing client authorization credentials using the control
3672 port, also remove the associated descriptor, so the onion service
3673 can no longer be contacted. Fixes bug 33148; bugfix
3676 o Minor bugfixes (pluggable transports):
3677 - When receiving a message on standard error from a pluggable
3678 transport, log it at info level, rather than as a warning. Fixes
3679 bug 33005; bugfix on 0.4.0.1-alpha.
3681 o Minor bugfixes (rust, build):
3682 - Fix a syntax warning given by newer versions of Rust that was
3683 creating problems for our continuous integration. Fixes bug 33212;
3684 bugfix on 0.3.5.1-alpha.
3686 o Minor bugfixes (TLS bug handling):
3687 - When encountering a bug in buf_read_from_tls(), return a "MISC"
3688 error code rather than "WANTWRITE". This change might help avoid
3689 some CPU-wasting loops if the bug is ever triggered. Bug reported
3690 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
3692 o Code simplification and refactoring (mainloop):
3693 - Simplify the ip_address_changed() function by removing redundant
3694 checks. Closes ticket 33091.
3696 o Documentation (manpage):
3697 - Split "Circuit Timeout" options and "Node Selection" options into
3698 their own sections of the tor manpage. Closes tickets 32928 and
3699 32929. Work by Swati Thacker as part of Google Season of Docs.
3702 Changes in version 0.4.2.6 - 2020-01-30
3703 This is the second stable release in the 0.4.2.x series. It backports
3704 several bugfixes from 0.4.3.1-alpha, including some that had affected
3705 the Linux seccomp2 sandbox or Windows services. If you're running with
3706 one of those configurations, you'll probably want to upgrade;
3707 otherwise, you should be fine with 0.4.2.5.
3709 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3710 - Correct how we use libseccomp. Particularly, stop assuming that
3711 rules are applied in a particular order or that more rules are
3712 processed after the first match. Neither is the case! In
3713 libseccomp <2.4.0 this led to some rules having no effect.
3714 libseccomp 2.4.0 changed how rules are generated, leading to a
3715 different ordering, which in turn led to a fatal crash during
3716 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3718 - Fix crash when reloading logging configuration while the
3719 experimental sandbox is enabled. Fixes bug 32841; bugfix on
3720 0.4.1.7. Patch by Peter Gerber.
3722 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
3723 - Use GCC/Clang's printf-checking feature to make sure that
3724 tor_assertf() arguments are correctly typed. Fixes bug 32765;
3725 bugfix on 0.4.1.1-alpha.
3727 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
3728 - Avoid a possible crash when trying to log a (fatal) assertion
3729 failure about mismatched magic numbers in configuration objects.
3730 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
3732 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
3733 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
3734 test_practracker.sh script. Doing so caused a test failure. Fixes
3735 bug 32705; bugfix on 0.4.2.1-alpha.
3736 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
3737 skipping practracker checks. Fixes bug 32705; bugfix
3740 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
3741 - Initialize the publish/subscribe system when running as a windows
3742 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3744 o Testing (backport from 0.4.3.1-alpha):
3745 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3746 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3747 fix the sandbox errors in 32722. Closes ticket 32240.
3748 - Re-enable the Travis CI macOS Chutney build, but don't let it
3749 prevent the Travis job from finishing. (The Travis macOS jobs are
3750 slow, so we don't want to have it delay the whole CI process.)
3751 Closes ticket 32629.
3753 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3754 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3757 Changes in version 0.4.1.8 - 2020-01-30
3758 This release backports several bugfixes from later release series,
3759 including some that had affected the Linux seccomp2 sandbox or Windows
3760 services. If you're running with one of those configurations, you'll
3761 probably want to upgrade; otherwise, you should be fine with your
3762 current version of 0.4.1.x.
3764 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
3765 - Correct how we use libseccomp. Particularly, stop assuming that
3766 rules are applied in a particular order or that more rules are
3767 processed after the first match. Neither is the case! In
3768 libseccomp <2.4.0 this led to some rules having no effect.
3769 libseccomp 2.4.0 changed how rules are generated, leading to a
3770 different ordering, which in turn led to a fatal crash during
3771 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3773 - Fix crash when reloading logging configuration while the
3774 experimental sandbox is enabled. Fixes bug 32841; bugfix on
3775 0.4.1.7. Patch by Peter Gerber.
3777 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
3778 - When running Tor with an option like --verify-config or
3779 --dump-config that does not start the event loop, avoid crashing
3780 if we try to exit early because of an error. Fixes bug 32407;
3781 bugfix on 0.3.3.1-alpha.
3783 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
3784 - Initialize the publish/subscribe system when running as a windows
3785 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3787 o Testing (backport from 0.4.3.1-alpha):
3788 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3789 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3790 fix the sandbox errors in 32722. Closes ticket 32240.
3791 - Re-enable the Travis CI macOS Chutney build, but don't let it
3792 prevent the Travis job from finishing. (The Travis macOS jobs are
3793 slow, so we don't want to have it delay the whole CI process.)
3794 Closes ticket 32629.
3796 o Testing (continuous integration, backport from 0.4.3.1-alpha):
3797 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3800 Changes in version 0.4.3.1-alpha - 2020-01-22
3801 This is the first alpha release in the 0.4.3.x series. It includes
3802 improved support for application integration of onion services, support
3803 for building in a client-only mode, and newly improved internal
3804 documentation (online at https://src-ref.docs.torproject.org/tor/). It
3805 also has numerous other small bugfixes and features, as well as
3806 improvements to our code's internal organization that should help us
3807 write better code in the future.
3809 o New system requirements:
3810 - When building Tor, you now need to have Python 3 in order to run
3811 the integration tests. (Python 2 is officially unsupported
3812 upstream, as of 1 Jan 2020.) Closes ticket 32608.
3814 o Major features (build system):
3815 - The relay code can now be disabled using the --disable-module-relay
3816 configure option. When this option is set, we also disable the
3817 dirauth module. Closes ticket 32123.
3818 - When Tor is compiled --disable-module-relay, we also omit the code
3819 used to act as a directory cache. Closes ticket 32487.
3821 o Major features (directory authority, ed25519):
3822 - Add support for banning a relay's ed25519 keys in the approved-
3823 routers file. This will help us migrate away from RSA keys in the
3824 future. Previously, only RSA keys could be banned in approved-
3825 routers. Resolves ticket 22029. Patch by Neel Chauhan.
3827 o Major features (onion service, controller):
3828 - New control port commands to manage client-side onion service
3829 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
3830 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
3831 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
3833 o Major features (onion service, SOCKS5):
3834 - Introduce a new SocksPort flag, ExtendedErrors, to support more
3835 detailed error codes in information for applications that support
3836 them. Closes ticket 30382; implements proposal 304.
3838 o Major features (proxy):
3839 - In addition to its current supported proxy types (HTTP CONNECT,
3840 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
3841 HAProxy server. A new torrc option was added to specify the
3842 address/port of the server: TCPProxy <protocol> <host>:<port>.
3843 Currently the only supported protocol for the option is haproxy.
3844 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
3846 o Major bugfixes (linux seccomp sandbox):
3847 - Correct how we use libseccomp. Particularly, stop assuming that
3848 rules are applied in a particular order or that more rules are
3849 processed after the first match. Neither is the case! In
3850 libseccomp <2.4.0 this led to some rules having no effect.
3851 libseccomp 2.4.0 changed how rules are generated, leading to a
3852 different ordering, which in turn led to a fatal crash during
3853 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
3855 - Fix crash when reloading logging configuration while the
3856 experimental sandbox is enabled. Fixes bug 32841; bugfix on
3857 0.4.1.7. Patch by Peter Gerber.
3859 o Major bugfixes (networking):
3860 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
3861 and accept strings as well as binary addresses. Fixes bug 32315;
3862 bugfix on 0.3.5.1-alpha.
3864 o Major bugfixes (onion service):
3865 - Report HS circuit failure back into the HS subsystem so we take
3866 appropriate action with regards to the client introduction point
3867 failure cache. This improves reachability of onion services, since
3868 now clients notice failing introduction circuits properly. Fixes
3869 bug 32020; bugfix on 0.3.2.1-alpha.
3871 o Minor feature (configure, build system):
3872 - Output a list of enabled/disabled features at the end of the
3873 configure process in a pleasing way. Closes ticket 31373.
3875 o Minor feature (heartbeat, onion service):
3876 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
3877 message. Closes ticket 31371.
3879 o Minor features (configuration validation):
3880 - Configuration validation can now be done by per-module callbacks,
3881 rather than a global validation function. This will let us reduce
3882 the size of config.c and some of its more cumbersome functions.
3883 Closes ticket 31241.
3885 o Minor features (configuration):
3886 - If a configured hardware crypto accelerator in AccelName is
3887 prefixed with "!", Tor now exits when it cannot be found. Closes
3889 - We now use flag-driven logic to warn about obsolete configuration
3890 fields, so that we can include their names. In 0.4.2, we used a
3891 special type, which prevented us from generating good warnings.
3892 Implements ticket 32404.
3894 o Minor features (controller):
3895 - Add stream isolation data to STREAM event. Closes ticket 19859.
3896 - Implement a new GETINFO command to fetch microdescriptor
3897 consensus. Closes ticket 31684.
3899 o Minor features (debugging, directory system):
3900 - Don't crash when we find a non-guard with a guard-fraction value
3901 set. Instead, log a bug warning, in an attempt to figure out how
3902 this happened. Diagnostic for ticket 32868.
3904 o Minor features (defense in depth):
3905 - Add additional checks around tor_vasprintf() usage, in case the
3906 function returns an error. Patch by Tobias Stoeckmann. Fixes
3909 o Minor features (developer tooling):
3910 - Remove the 0.2.9.x series branches from git scripts (git-merge-
3911 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
3912 Closes ticket 32772.
3914 o Minor features (developer tools):
3915 - Add a check_cocci_parse.sh script that checks that new code is
3916 parseable by Coccinelle. Add an exceptions file for unparseable
3917 files, and run the script from travis CI. Closes ticket 31919.
3918 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
3919 target. Closes ticket 31919.
3920 - Add a rename_c_identifiers.py tool to rename a bunch of C
3921 identifiers at once, and generate a well-formed commit message
3922 describing the change. This should help with refactoring. Closes
3924 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
3925 semantic patching tool with the correct flags. These flags are
3926 fairly easy to forget, and these scripts should help us use
3927 Coccinelle more effectively in the future. Closes ticket 31705.
3929 o Minor features (Doxygen):
3930 - Update Doxygen configuration file to a more recent template (from
3931 1.8.15). Closes ticket 32110.
3932 - "make doxygen" now works with out-of-tree builds. Closes
3934 - Make sure that doxygen outputs documentation for all of our C
3935 files. Previously, some were missing @file declarations, causing
3936 them to be ignored. Closes ticket 32307.
3937 - Our "make doxygen" target now respects --enable-fatal-warnings by
3938 default, and does not warn about items that are missing
3939 documentation. To warn about missing documentation, run configure
3940 with the "--enable-missing-doc-warnings" flag: doing so suspends
3941 fatal warnings for doxygen. Closes ticket 32385.
3943 o Minor features (git scripts):
3944 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
3945 customisation. Closes ticket 32347.
3946 - Add git-setup-dirs.sh, which sets up an upstream git repository
3947 and worktrees for tor maintainers. Closes ticket 29603.
3948 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
3949 remote. Closes ticket 32347.
3950 - Call the check_cocci_parse.sh script from the git commit and push
3951 hooks. Closes ticket 31919.
3952 - Make git-push-all.sh skip unchanged branches when pushing to
3953 upstream. The script already skipped unchanged test branches.
3954 Closes ticket 32216.
3955 - Make git-setup-dirs.sh create a master symlink in the worktree
3956 directory. Closes ticket 32347.
3957 - Skip unmodified source files when doing some existing git hook
3958 checks. Related to ticket 31919.
3960 o Minor features (IPv6, client):
3961 - Make Tor clients tell dual-stack exits that they prefer IPv6
3962 connections. This change is equivalent to setting the PreferIPv6
3963 flag on SOCKSPorts (and most other listener ports). Tor Browser
3964 has been setting this flag for some time, and we want to remove a
3965 client distinguisher at exits. Closes ticket 32637.
3967 o Minor features (portability, android):
3968 - When building for Android, disable some tests that depend on $HOME
3969 and/or pwdb, which Android doesn't have. Closes ticket 32825.
3970 Patch from Hans-Christoph Steiner.
3972 o Minor features (relay modularity):
3973 - Split the relay and server pluggable transport config code into
3974 separate files in the relay module. Disable this code when the
3975 relay module is disabled. Closes part of ticket 32213.
3976 - When the relay module is disabled, reject attempts to set the
3977 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
3978 ServerTransport* options, rather than ignoring the values of these
3979 options. Closes part of ticket 32213.
3981 o Minor features (relay):
3982 - When the relay module is disabled, change the default config so
3983 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
3985 o Minor features (release tools):
3986 - Port our ChangeLog formatting and sorting tools to Python 3.
3987 Closes ticket 32704.
3989 o Minor features (testing):
3990 - Detect some common failure cases for test_parseconf.sh in
3991 src/test/conf_failures. Closes ticket 32451.
3992 - Allow test_parseconf.sh to test expected log outputs for successful
3993 configs, as well as failed configs. Closes ticket 32451.
3994 - The test_parseconf.sh script now supports result variants for any
3995 combination of the optional libraries lzma, nss, and zstd. Closes
3998 o Minor features (tests, Android):
3999 - When running the unit tests on Android, create temporary files in
4000 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
4001 patch from Hans-Christoph Steiner.
4003 o Minor bugfixes (bridges):
4004 - Lowercase the configured value of BridgeDistribution before adding
4005 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
4007 o Minor bugfixes (build system):
4008 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
4009 bugfix on 0.4.1.2-alpha.
4011 o Minor bugfixes (configuration handling):
4012 - Make control_event_conf_changed() take in a config_line_t instead
4013 of a smartlist of alternating key/value entries. Fixes bug 31531;
4014 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
4016 o Minor bugfixes (configuration):
4017 - Check for multiplication overflow when parsing memory units inside
4018 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
4019 - When dumping the configuration, stop adding a trailing space after
4020 the option name when there is no option value. This issue only
4021 affects options that accept an empty value or list. (Most options
4022 reject empty values, or delete the entire line from the dumped
4023 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
4024 - Avoid changing the user's value of HardwareAccel as stored by
4025 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
4026 bug 32382; bugfix on 0.2.2.1-alpha.
4027 - When creating a KeyDirectory with the same location as the
4028 DataDirectory (not recommended), respect the DataDirectory's
4029 group-readable setting if one has not been set for the
4030 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
4032 o Minor bugfixes (controller):
4033 - In routerstatus_has_changed(), check all the fields that are
4034 output over the control port. Fixes bug 20218; bugfix
4037 o Minor bugfixes (correctness checks):
4038 - Use GCC/Clang's printf-checking feature to make sure that
4039 tor_assertf() arguments are correctly typed. Fixes bug 32765;
4040 bugfix on 0.4.1.1-alpha.
4042 o Minor bugfixes (developer tools):
4043 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
4044 31336; bugfix on 0.4.1.2-alpha.
4046 o Minor bugfixes (dirauth module):
4047 - Split the dirauth config code into a separate file in the dirauth
4048 module. Disable this code when the dirauth module is disabled.
4049 Closes ticket 32213.
4050 - When the dirauth module is disabled, reject attempts to set the
4051 AuthoritativeDir option, rather than ignoring the value of the
4052 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
4054 o Minor bugfixes (embedded Tor):
4055 - When starting Tor any time after the first time in a process,
4056 register the thread in which it is running as the main thread.
4057 Previously, we only did this on Windows, which could lead to bugs
4058 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
4061 o Minor bugfixes (git scripts):
4062 - Avoid sleeping before the last push in git-push-all.sh. Closes
4064 - Forward all unrecognised arguments in git-push-all.sh to git push.
4065 Closes ticket 32216.
4067 o Minor bugfixes (hidden service v3):
4068 - Do not rely on a "circuit established" flag for intro circuits but
4069 instead always query the HS circuit map. This is to avoid sync
4070 issue with that flag and the map. Fixes bug 32094; bugfix
4073 o Minor bugfixes (logging, crash):
4074 - Avoid a possible crash when trying to log a (fatal) assertion
4075 failure about mismatched magic numbers in configuration objects.
4076 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
4078 o Minor bugfixes (onion service v2):
4079 - When sending the INTRO cell for a v2 Onion Service, look at the
4080 failure cache alongside timeout values to check if the intro point
4081 is marked as failed. Previously, we only looked at the relay
4082 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
4085 o Minor bugfixes (onion services v3, client):
4086 - Properly handle the client rendezvous circuit timeout. Previously
4087 Tor would sometimes timeout a rendezvous circuit awaiting the
4088 introduction ACK, and find itself unable to re-establish all
4089 circuits because the rendezvous circuit timed out too early. Fixes
4090 bug 32021; bugfix on 0.3.2.1-alpha.
4092 o Minor bugfixes (onion services):
4093 - In cancel_descriptor_fetches(), use
4094 connection_list_by_type_purpose() instead of
4095 connection_list_by_type_state(). Fixes bug 32639; bugfix on
4096 0.3.2.1-alpha. Patch by Neel Chauhan.
4098 o Minor bugfixes (scripts):
4099 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
4100 bugfix on 0.4.0.1-alpha.
4102 o Minor bugfixes (test):
4103 - Use the same code to find the tor binary in all of our test
4104 scripts. This change makes sure we are always using the coverage
4105 binary when coverage is enabled. Fixes bug 32368; bugfix
4108 o Minor bugfixes (testing):
4109 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
4110 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
4111 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
4112 test_practracker.sh script. Doing so caused a test failure. Fixes
4113 bug 32705; bugfix on 0.4.2.1-alpha.
4114 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
4115 skipping practracker checks. Fixes bug 32705; bugfix
4118 o Minor bugfixes (tests):
4119 - Our option-validation tests no longer depend on specially
4120 configured non-default, non-passing sets of options. Previously,
4121 the tests had been written to assume that options would _not_ be
4122 set to their defaults, which led to needless complexity and
4123 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
4125 o Minor bugfixes (windows service):
4126 - Initialize the publish/subscribe system when running as a windows
4127 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
4129 o Deprecated features:
4130 - Deprecate the ClientAutoIPv6ORPort option. This option was not
4131 true "Happy Eyeballs", and often failed on connections that
4132 weren't reliably dual-stack. Closes ticket 32942. Patch by
4136 - Provide a quickstart guide for a Circuit Padding Framework, and
4137 documentation for researchers to implement and study circuit
4138 padding machines. Closes ticket 28804.
4139 - Add documentation in 'HelpfulTools.md' to describe how to build a
4140 tag file. Closes ticket 32779.
4141 - Create a high-level description of the long-term software
4142 architecture goals. Closes ticket 32206.
4143 - Describe the --dump-config command in the manual page. Closes
4145 - Unite coding advice from this_not_that.md in torguts repo into our
4146 coding standards document. Resolves ticket 31853.
4149 - Our Doxygen configuration no longer generates LaTeX output. The
4150 reference manual produced by doing this was over 4000 pages long,
4151 and generally unusable. Closes ticket 32099.
4152 - The option "TestingEstimatedDescriptorPropagationTime" is now
4153 marked as obsolete. It has had no effect since 0.3.0.7, when
4154 clients stopped rejecting consensuses "from the future". Closes
4156 - We no longer support consensus methods before method 28; these
4157 methods were only used by authorities running versions of Tor that
4158 are now at end-of-life. In effect, this means that clients,
4159 relays, and authorities now assume that authorities will be
4160 running version 0.3.5.x or later. Closes ticket 32695.
4163 - Add more test cases for tor's UTF-8 validation function. Also,
4164 check the arguments passed to the function for consistency. Closes
4166 - Improve test coverage for relay and dirauth config code, focusing
4167 on option validation and normalization. Closes ticket 32213.
4168 - Improve the consistency of test_parseconf.sh output, and run all
4169 the tests, even if one fails. Closes ticket 32213.
4170 - Re-enable the Travis CI macOS Chutney build, but don't let it
4171 prevent the Travis job from finishing. (The Travis macOS jobs are
4172 slow, so we don't want to have it delay the whole CI process.)
4173 Closes ticket 32629.
4174 - Run the practracker unit tests in the pre-commit git hook. Closes
4176 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
4177 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
4178 fix the sandbox errors in 32722. Closes ticket 32240.
4180 o Code simplification and refactoring (channel):
4181 - Channel layer had a variable length cell handler that was not used
4182 and thus removed. Closes ticket 32892.
4184 o Code simplification and refactoring (configuration):
4185 - Immutability is now implemented as a flag on individual
4186 configuration options rather than as part of the option-transition
4187 checking code. Closes ticket 32344.
4188 - Instead of keeping a list of configuration options to check for
4189 relative paths, check all the options whose type is "FILENAME".
4190 Solves part of ticket 32339.
4191 - Our default log (which ordinarily sends NOTICE-level messages to
4192 standard output) is now handled in a more logical manner.
4193 Previously, we replaced the configured log options if they were
4194 empty. Now, we interpret an empty set of log options as meaning
4195 "use the default log". Closes ticket 31999.
4196 - Remove some unused arguments from the options_validate() function,
4197 to simplify our code and tests. Closes ticket 32187.
4198 - Simplify the options_validate() code so that it looks at the
4199 default options directly, rather than taking default options as an
4200 argument. This change lets us simplify its interface. Closes
4202 - Use our new configuration architecture to move most authority-
4203 related options to the directory authority module. Closes
4205 - When parsing the command line, handle options that determine our
4206 "quiet level" and our mode of operation (e.g., --dump-config and
4207 so on) all in one table. Closes ticket 32003.
4209 o Code simplification and refactoring (controller):
4210 - Create a new abstraction for formatting control protocol reply
4211 lines based on key-value pairs. Refactor some existing control
4212 protocol code to take advantage of this. Closes ticket 30984.
4213 - Create a helper function that can fetch network status or
4214 microdesc consensuses. Closes ticket 31684.
4216 o Code simplification and refactoring (dirauth modularization):
4217 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
4218 Closes ticket 32163.
4219 - Replace some confusing identifiers in process_descs.c. Closes
4221 - Simplify some relay and dirauth config code. Closes ticket 32213.
4223 o Code simplification and refactoring (misc):
4224 - Make all the structs we declare follow the same naming convention
4225 of ending with "_t". Closes ticket 32415.
4226 - Move and rename some configuration-related code for clarity.
4227 Closes ticket 32304.
4228 - Our include.am files are now broken up by subdirectory.
4229 Previously, src/core/include.am covered all of the subdirectories
4230 in "core", "feature", and "app". Closes ticket 32137.
4231 - Remove underused NS*() macros from test code: they make our tests
4232 more confusing, especially for code-formatting tools. Closes
4235 o Code simplification and refactoring (relay modularization):
4236 - Disable relay_periodic when the relay module is disabled. Closes
4238 - Disable relay_sys when the relay module is disabled. Closes
4241 o Code simplification and refactoring (tool support):
4242 - Add numerous missing dependencies to our include files, so that
4243 they can be included in different reasonable orders and still
4244 compile. Addresses part of ticket 32764.
4245 - Fix some parts of our code that were difficult for Coccinelle to
4246 parse. Related to ticket 31705.
4247 - Fix some small issues in our code that prevented automatic
4248 formatting tools from working. Addresses part of ticket 32764.
4250 o Documentation (manpage):
4251 - Alphabetize the Client Options section of the tor manpage. Closes
4253 - Alphabetize the General Options section of the tor manpage. Closes
4255 - In the tor(1) manpage, reword and improve formatting of the
4256 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
4257 32277. Based on work by Swati Thacker as part of Google Season
4259 - In the tor(1) manpage, reword and improve formatting of the FILES,
4260 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
4261 Swati Thacker as part of Google Season of Docs.
4263 o Testing (circuit, EWMA):
4264 - Add unit tests for circuitmux and EWMA subsystems. Closes
4267 o Testing (continuous integration):
4268 - Use zstd in our Travis Linux builds. Closes ticket 32242.
4271 Changes in version 0.4.2.5 - 2019-12-09
4272 This is the first stable release in the 0.4.2.x series. This series
4273 improves reliability and stability, and includes several stability and
4274 correctness improvements for onion services. It also fixes many smaller
4275 bugs present in previous series.
4277 Per our support policy, we will support the 0.4.2.x series for nine
4278 months, or until three months after the release of a stable 0.4.3.x:
4279 whichever is longer. If you need longer-term support, please stick
4280 with 0.3.5.x, which will we plan to support until Feb 2022.
4282 Per our support policy, we will support the 0.4.2.x series for nine
4283 months, or until three months after the release of a stable 0.4.3.x:
4284 whichever is longer. If you need longer-term support, please stick
4285 with 0.3.5.x, which will we plan to support until Feb 2022.
4287 Below are the changes since 0.4.1.4-rc. For a complete list of changes
4288 since 0.4.1.5, see the ReleaseNotes file.
4290 o Minor features (geoip):
4291 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4292 Country database. Closes ticket 32685.
4295 - Require C99 standards-conforming code in Travis CI, but allow GNU
4296 gcc extensions. Also activates clang's -Wtypedef-redefinition
4297 warnings. Build some jobs with -std=gnu99, and some jobs without.
4298 Closes ticket 32500.
4301 Changes in version 0.4.1.7 - 2019-12-09
4302 This release backports several bugfixes to improve stability and
4303 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
4304 including all relays relying on AccountingMax, should upgrade.
4306 o Major features (directory authorities, backport from 0.4.2.2-alpha):
4307 - Directory authorities now reject relays running all currently
4308 deprecated release series. The currently supported release series
4309 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4311 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
4312 - Avoid a possible crash when restarting Tor in embedded mode and
4313 enabling a different set of publish/subscribe messages. Fixes bug
4314 31898; bugfix on 0.4.1.1-alpha.
4316 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4317 - Relays now respect their AccountingMax bandwidth again. When
4318 relays entered "soft" hibernation (which typically starts when
4319 we've hit 90% of our AccountingMax), we had stopped checking
4320 whether we should enter hard hibernation. Soft hibernation refuses
4321 new connections and new circuits, but the existing circuits can
4322 continue, meaning that relays could have exceeded their configured
4323 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4325 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4326 - Stop ignoring torrc options after an %include directive, when the
4327 included directory ends with a file that does not contain any
4328 config options (but does contain comments or whitespace). Fixes
4329 bug 31408; bugfix on 0.3.1.1-alpha.
4331 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4332 - Onion services now always use the exact number of intro points
4333 configured with the HiddenServiceNumIntroductionPoints option (or
4334 fewer if nodes are excluded). Before, a service could sometimes
4335 pick more intro points than configured. Fixes bug 31548; bugfix
4338 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4339 - When building on Appveyor and Travis, pass the "-k" flag to make,
4340 so that we are informed of all compilation failures, not just the
4341 first one or two. Closes ticket 31372.
4343 o Minor features (geoip, backport from 0.4.2.5):
4344 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4345 Country database. Closes ticket 32685.
4347 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4348 - Avoid spurious errors when Appveyor CI fails before the install step.
4349 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4351 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4352 - Fix a BUG() assertion that occurs within a very small race window
4353 between when a client intro circuit opens and when its descriptor
4354 gets cleaned up from the cache. The circuit is now closed early,
4355 which will trigger a re-fetch of the descriptor and continue the
4356 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4358 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4359 - Avoid trying to read data from closed connections, which can cause
4360 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4361 30344; bugfix on 0.1.1.1-alpha.
4363 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4364 - On abort, try harder to flush the output buffers of log messages.
4365 On some platforms (macOS), log messages could be discarded when
4366 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4367 - Report the tor version whenever an assertion fails. Previously, we
4368 only reported the Tor version on some crashes, and some non-fatal
4369 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4370 - When tor aborts due to an error, close log file descriptors before
4371 aborting. Closing the logs makes some OSes flush log file buffers,
4372 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4375 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4376 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4377 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4378 - Disable backtrace signal handlers when shutting down tor. Fixes
4379 bug 31614; bugfix on 0.2.5.2-alpha.
4380 - Rate-limit our the logging message about the obsolete .exit
4381 notation. Previously, there was no limit on this warning, which
4382 could potentially be triggered many times by a hostile website.
4383 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4385 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4386 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4387 cell on a connection using the obsolete v1 link protocol. Log a
4388 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4390 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4391 - Reset the periodic events' "enabled" flag when Tor is shut down
4392 cleanly. Previously, this flag was left on, which caused periodic
4393 events not to be re-enabled when Tor was relaunched in-process
4394 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4397 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
4398 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4399 31736; bugfix on 0.0.7.
4401 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
4402 - Remove overly strict assertions that triggered when a pluggable
4403 transport failed to launch. Fixes bug 31091; bugfix
4405 - Remove an assertion in the Unix process backend. This assertion
4406 would trigger when we failed to find the executable for a child
4407 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4409 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4410 - Avoid crashing when starting with a corrupt keys directory where
4411 the old ntor key and the new ntor key are identical. Fixes bug
4412 30916; bugfix on 0.2.4.8-alpha.
4414 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4415 - When testing port rebinding, don't busy-wait for tor to log.
4416 Instead, actually sleep for a short time before polling again.
4417 Also improve the formatting of control commands and log messages.
4418 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4420 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
4421 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4422 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4424 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4425 - Log bugs about the TLS read buffer's length only once, rather than
4426 filling the logs with similar warnings. Fixes bug 31939; bugfix
4429 o Documentation (backport from 0.4.2.2-alpha):
4430 - Explain why we can't destroy the backtrace buffer mutex. Explain
4431 why we don't need to destroy the log mutex. Closes ticket 31736.
4433 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4434 - Disable all but one Travis CI macOS build, to mitigate slow
4435 scheduling of Travis macOS jobs. Closes ticket 32177.
4436 - Run the chutney IPv6 networks as part of Travis CI. Closes
4438 - Simplify the Travis CI build matrix, and optimise for build time.
4439 Closes ticket 31859.
4440 - Use Windows Server 2019 instead of Windows Server 2016 in our
4441 Appveyor builds. Closes ticket 32086.
4443 o Testing (continuous integration, backport from 0.4.2.4-rc):
4444 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4445 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4446 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4447 until we can fix some Bionic permissions issues (see ticket
4448 32240). Related to ticket 31919.
4449 - Install the mingw OpenSSL package in Appveyor. This makes sure
4450 that the OpenSSL headers and libraries match in Tor's Appveyor
4451 builds. (This bug was triggered by an Appveyor image update.)
4452 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4454 o Testing (continuous integration, backport from 0.4.2.5):
4455 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4456 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4457 Build some jobs with -std=gnu99, and some jobs without.
4458 Closes ticket 32500.
4461 Changes in version 0.4.0.6 - 2019-12-09
4462 This is the second stable release in the 0.4.0.x series. This release
4463 backports several bugfixes to improve stability and correctness. Anyone
4464 experiencing build problems or crashes with 0.4.0.5, including all relays
4465 relying on AccountingMax, should upgrade.
4467 Note that, per our support policy, support for the 0.4.0.x series will end
4468 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
4469 latest stable release, or downgrade to 0.3.5.x, which will get long-term
4470 support until 1 Feb 2022.
4472 o Directory authority changes (backport from 0.4.1.5):
4473 - The directory authority "dizum" has a new IP address. Closes
4476 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
4477 - Consider our directory information to have changed when our list
4478 of bridges changes. Previously, Tor would not re-compute the
4479 status of its directory information when bridges changed, and
4480 therefore would not realize that it was no longer able to build
4481 circuits. Fixes part of bug 29875.
4482 - Do not count previously configured working bridges towards our
4483 total of working bridges. Previously, when Tor's list of bridges
4484 changed, it would think that the old bridges were still usable,
4485 and delay fetching router descriptors for the new ones. Fixes part
4486 of bug 29875; bugfix on 0.3.0.1-alpha.
4488 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
4489 - When considering upgrading circuits from "waiting for guard" to
4490 "open", always ignore circuits that are marked for close. Otherwise,
4491 we can end up in the situation where a subsystem is notified that
4492 a closing circuit has just opened, leading to undesirable
4493 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
4495 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
4496 - Properly clean up the introduction point map when circuits change
4497 purpose from onion service circuits to pathbias, measurement, or
4498 other circuit types. This should fix some service-side instances
4499 of introduction point failure. Fixes bug 29034; bugfix
4502 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
4503 - Fix an unreachable bug in which an introduction point could try to
4504 send an INTRODUCE_ACK with a status code that Trunnel would refuse
4505 to encode, leading the relay to assert(). We've consolidated the
4506 ABI values into Trunnel now. Fixes bug 30454; bugfix
4508 - Clients can now handle unknown status codes from INTRODUCE_ACK
4509 cells. (The NACK behavior will stay the same.) This will allow us
4510 to extend status codes in the future without breaking the normal
4511 client behavior. Fixes another part of bug 30454; bugfix
4514 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
4515 - Relays now respect their AccountingMax bandwidth again. When
4516 relays entered "soft" hibernation (which typically starts when
4517 we've hit 90% of our AccountingMax), we had stopped checking
4518 whether we should enter hard hibernation. Soft hibernation refuses
4519 new connections and new circuits, but the existing circuits can
4520 continue, meaning that relays could have exceeded their configured
4521 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4523 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4524 - Stop ignoring torrc options after an %include directive, when the
4525 included directory ends with a file that does not contain any
4526 config options (but does contain comments or whitespace). Fixes
4527 bug 31408; bugfix on 0.3.1.1-alpha.
4529 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4530 - Onion services now always use the exact number of intro points
4531 configured with the HiddenServiceNumIntroductionPoints option (or
4532 fewer if nodes are excluded). Before, a service could sometimes
4533 pick more intro points than configured. Fixes bug 31548; bugfix
4536 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
4537 - Add a "--list-modules" command to print a list of which compile-
4538 time modules are enabled. Closes ticket 30452.
4540 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
4541 - Remove sudo configuration lines from .travis.yml as they are no
4542 longer needed with current Travis build environment. Resolves
4545 o Minor features (continuous integration, backport from 0.4.1.4-rc):
4546 - Our Travis configuration now uses Chutney to run some network
4547 integration tests automatically. Closes ticket 29280.
4549 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4550 - When building on Appveyor and Travis, pass the "-k" flag to make,
4551 so that we are informed of all compilation failures, not just the
4552 first one or two. Closes ticket 31372.
4554 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4555 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4556 in December 2018 (of which ~122 were still functional), with a
4557 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4558 in June 2019. Closes ticket 28795.
4560 o Minor features (geoip, backport from 0.4.2.5):
4561 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4562 Country database. Closes ticket 32685.
4564 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4565 - Change "make test-stem" so it only runs the stem tests that use
4566 tor. This change makes test-stem faster and more reliable. Closes
4569 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4570 - Avoid spurious errors when Appveyor CI fails before the install step.
4571 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4573 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4574 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4575 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4577 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
4578 - Fix a logic error that prevented the SessionGroup sub-option from
4579 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
4581 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
4582 - On relays, properly check that a padding machine is absent before
4583 logging a warning about it being absent. Fixes bug 30649; bugfix
4586 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4587 - Fix a BUG() assertion that occurs within a very small race window
4588 between when a client intro circuit opens and when its descriptor
4589 gets cleaned up from the cache. The circuit is now closed early,
4590 which will trigger a re-fetch of the descriptor and continue the
4591 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4593 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
4594 - Don't believe clock skew results from NETINFO cells that appear to
4595 arrive before we sent the VERSIONS cells they are responding to.
4596 Previously, we would accept them up to 3 minutes "in the past".
4597 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4599 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
4600 - Fix a compilation warning on Windows about casting a function
4601 pointer for GetTickCount64(). Fixes bug 31374; bugfix
4604 o Minor bugfixes (compilation, backport from 0.4.1.5):
4605 - Avoid using labs() on time_t, which can cause compilation warnings
4606 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4608 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4609 - Suppress spurious float-conversion warnings from GCC when calling
4610 floating-point classifier functions on FreeBSD. Fixes part of bug
4611 31687; bugfix on 0.3.1.5-alpha.
4613 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
4614 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
4615 due to missing declarations of abort(), and prevent other such
4616 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
4618 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
4619 - Fix a bug that prevented us from supporting SOCKS5 proxies that
4620 want authentication along with configured (but unused!)
4621 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
4623 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4624 - Avoid trying to read data from closed connections, which can cause
4625 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4626 30344; bugfix on 0.1.1.1-alpha.
4628 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
4629 - Allow the test-stem job to fail in Travis, because it sometimes
4630 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
4631 - Skip test_rebind on macOS in Travis, because it is unreliable on
4632 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4633 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
4634 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4636 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
4637 - Avoid a set of possible code paths that could try to use freed
4638 memory in routerlist_free() while Tor was exiting. Fixes bug
4639 31003; bugfix on 0.1.2.2-alpha.
4641 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
4642 - Stop crashing after parsing an unknown descriptor purpose
4643 annotation. We think this bug can only be triggered by modifying a
4644 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
4646 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
4647 - Move the "bandwidth-file-headers" line in directory authority
4648 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
4651 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4652 - On abort, try harder to flush the output buffers of log messages.
4653 On some platforms (macOS), log messages could be discarded when
4654 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4655 - Report the tor version whenever an assertion fails. Previously, we
4656 only reported the Tor version on some crashes, and some non-fatal
4657 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4659 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4660 - When extracting an IPv6 address from a PF-based proxy, verify that
4661 we are actually configured to receive an IPv6 address, and log an
4662 internal error if not. Fixes part of bug 31687; bugfix
4665 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4666 - When tor is missing descriptors for some primary entry guards,
4667 make the log message less alarming. It's normal for descriptors to
4668 expire, as long as tor fetches new ones soon after. Fixes bug
4669 31657; bugfix on 0.3.3.1-alpha.
4671 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
4672 - Do not log a warning when running with an OpenSSL version other
4673 than the one Tor was compiled with, if the two versions should be
4674 compatible. Previously, we would warn whenever the version was
4675 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
4677 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4678 - Change log level of message "Hash of session info was not as
4679 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4682 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4683 - Rate-limit our the logging message about the obsolete .exit
4684 notation. Previously, there was no limit on this warning, which
4685 could potentially be triggered many times by a hostile website.
4686 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4688 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4689 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4690 cell on a connection using the obsolete v1 link protocol. Log a
4691 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4693 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4694 - Reset the periodic events' "enabled" flag when Tor is shut down
4695 cleanly. Previously, this flag was left on, which caused periodic
4696 events not to be re-enabled when Tor was relaunched in-process
4697 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4700 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
4701 - Avoid a minor memory leak that could occur on relays when failing
4702 to create a "keys" directory. Fixes bug 30148; bugfix
4705 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
4706 - Fix a trivial memory leak when parsing an invalid value
4707 from a download schedule in the configuration. Fixes bug
4708 30894; bugfix on 0.3.4.1-alpha.
4710 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
4711 - Fix usage of minherit() on NetBSD and other platforms that define
4712 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
4713 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
4715 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
4716 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
4717 implemenation) when failing to load an onion service client
4718 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
4720 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
4721 - When purging the DNS cache because of an out-of-memory condition,
4722 try purging just the older entries at first. Previously, we would
4723 always purge the whole thing. Fixes bug 29617; bugfix
4726 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
4727 - Avoid crashing in our tor_vasprintf() implementation on systems
4728 that define neither vasprintf() nor _vscprintf(). (This bug has
4729 been here long enough that we question whether people are running
4730 Tor on such systems, but we're applying the fix out of caution.)
4731 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
4734 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
4735 - Remove overly strict assertions that triggered when a pluggable
4736 transport failed to launch. Fixes bug 31091; bugfix
4738 - Remove an assertion in the Unix process backend. This assertion
4739 would trigger when we failed to find the executable for a child
4740 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4742 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4743 - Avoid crashing when starting with a corrupt keys directory where
4744 the old ntor key and the new ntor key are identical. Fixes bug
4745 30916; bugfix on 0.2.4.8-alpha.
4747 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4748 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4749 31463; bugfix on 0.3.5.4-alpha.
4751 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4752 - When testing port rebinding, don't busy-wait for tor to log.
4753 Instead, actually sleep for a short time before polling again.
4754 Also improve the formatting of control commands and log messages.
4755 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4757 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4758 - Log bugs about the TLS read buffer's length only once, rather than
4759 filling the logs with similar warnings. Fixes bug 31939; bugfix
4762 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4763 - Always retry v2 single onion service intro and rend circuits with
4764 a 3-hop path. Previously, v2 single onion services used a 3-hop
4765 path when rendezvous circuits were retried after a remote or
4766 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4767 23818; bugfix on 0.2.9.3-alpha.
4768 - Make v3 single onion services fall back to a 3-hop intro, when all
4769 intro points are unreachable via a 1-hop path. Previously, v3
4770 single onion services failed when all intro nodes were unreachable
4771 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4773 o Documentation (backport from 0.4.2.1-alpha):
4774 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4775 notice.html so that operators no longer have to host it
4776 themselves. Closes ticket 31089.
4778 o Testing (backport from 0.4.1.2-alpha):
4779 - Specify torrc paths (with empty files) when launching tor in
4780 integration tests; refrain from reading user and system torrcs.
4781 Resolves issue 29702.
4783 o Testing (continuous integration, backport from 0.4.1.1-alpha):
4784 - In Travis, show stem's tor log after failure. Closes ticket 30234.
4786 o Testing (continuous integration, backport from 0.4.1.5):
4787 - In Travis, make stem log a controller trace to the console, and
4788 tail stem's tor log after failure. Closes ticket 30591.
4789 - In Travis, only run the stem tests that use a tor binary. Closes
4792 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4793 - Disable all but one Travis CI macOS build, to mitigate slow
4794 scheduling of Travis macOS jobs. Closes ticket 32177.
4795 - Run the chutney IPv6 networks as part of Travis CI. Closes
4797 - Simplify the Travis CI build matrix, and optimise for build time.
4798 Closes ticket 31859.
4799 - Use Windows Server 2019 instead of Windows Server 2016 in our
4800 Appveyor builds. Closes ticket 32086.
4802 o Testing (continuous integration, backport from 0.4.2.4-rc):
4803 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4804 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4805 until we can fix some Bionic permissions issues (see ticket
4806 32240). Related to ticket 31919.
4807 - Install the mingw OpenSSL package in Appveyor. This makes sure
4808 that the OpenSSL headers and libraries match in Tor's Appveyor
4809 builds. (This bug was triggered by an Appveyor image update.)
4810 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4811 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4813 o Testing (continuous integration, backport from 0.4.2.5):
4814 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4815 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4816 Build some jobs with -std=gnu99, and some jobs without.
4817 Closes ticket 32500.
4819 Changes in version 0.3.5.9 - 2019-12-09
4820 Tor 0.3.5.9 backports serveral fixes from later releases, including
4821 several that affect bridge users, relay stability, onion services,
4824 o Directory authority changes (backport from 0.4.1.5):
4825 - The directory authority "dizum" has a new IP address. Closes
4828 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
4829 - Consider our directory information to have changed when our list
4830 of bridges changes. Previously, Tor would not re-compute the
4831 status of its directory information when bridges changed, and
4832 therefore would not realize that it was no longer able to build
4833 circuits. Fixes part of bug 29875.
4834 - Do not count previously configured working bridges towards our
4835 total of working bridges. Previously, when Tor's list of bridges
4836 changed, it would think that the old bridges were still usable,
4837 and delay fetching router descriptors for the new ones. Fixes part
4838 of bug 29875; bugfix on 0.3.0.1-alpha.
4840 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
4841 - When considering upgrading circuits from "waiting for guard" to
4842 "open", always ignore circuits that are marked for close. Otherwise,
4843 we can end up in the situation where a subsystem is notified that
4844 a closing circuit has just opened, leading to undesirable
4845 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
4847 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
4848 - When running with NSS, disable TLS 1.2 ciphersuites that use
4849 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
4850 these ciphersuites don't work -- which caused relays to fail to
4851 handshake with one another when these ciphersuites were enabled.
4852 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
4854 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
4855 - Properly clean up the introduction point map when circuits change
4856 purpose from onion service circuits to pathbias, measurement, or
4857 other circuit types. This should fix some service-side instances
4858 of introduction point failure. Fixes bug 29034; bugfix
4861 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
4862 - Fix an unreachable bug in which an introduction point could try to
4863 send an INTRODUCE_ACK with a status code that Trunnel would refuse
4864 to encode, leading the relay to assert(). We've consolidated the
4865 ABI values into Trunnel now. Fixes bug 30454; bugfix
4867 - Clients can now handle unknown status codes from INTRODUCE_ACK
4868 cells. (The NACK behavior will stay the same.) This will allow us
4869 to extend status codes in the future without breaking the normal
4870 client behavior. Fixes another part of bug 30454; bugfix
4873 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
4874 - Stop ignoring torrc options after an %include directive, when the
4875 included directory ends with a file that does not contain any
4876 config options (but does contain comments or whitespace). Fixes
4877 bug 31408; bugfix on 0.3.1.1-alpha.
4879 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
4880 - Onion services now always use the exact number of intro points
4881 configured with the HiddenServiceNumIntroductionPoints option (or
4882 fewer if nodes are excluded). Before, a service could sometimes
4883 pick more intro points than configured. Fixes bug 31548; bugfix
4886 o Minor features (address selection, backport from 0.4.0.3-alpha):
4887 - Treat the subnet 100.64.0.0/10 as public for some purposes;
4888 private for others. This subnet is the RFC 6598 (Carrier Grade
4889 NAT) IP range, and is deployed by many ISPs as an alternative to
4890 RFC 1918 that does not break existing internal networks. Tor now
4891 blocks SOCKS and control ports on these addresses and warns users
4892 if client ports or ExtORPorts are listening on a RFC 6598 address.
4893 Closes ticket 28525. Patch by Neel Chauhan.
4895 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
4896 - Make bandwidth authorities ignore relays that are reported in the
4897 bandwidth file with the flag "vote=0". This change allows us to
4898 report unmeasured relays for diagnostic reasons without including
4899 their bandwidth in the bandwidth authorities' vote. Closes
4902 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
4903 - Add a "--list-modules" command to print a list of which compile-
4904 time modules are enabled. Closes ticket 30452.
4906 o Minor features (continuous integration, backport from 0.4.0.4-rc):
4907 - On Travis Rust builds, cleanup Rust registry and refrain from
4908 caching the "target/" directory to speed up builds. Resolves
4911 o Minor features (continuous integration, backport from 0.4.0.5):
4912 - In Travis, tell timelimit to use stem's backtrace signals, and
4913 launch python directly from timelimit, so python receives the
4914 signals from timelimit, rather than make. Closes ticket 30117.
4916 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
4917 - Remove sudo configuration lines from .travis.yml as they are no
4918 longer needed with current Travis build environment. Resolves
4921 o Minor features (continuous integration, backport from 0.4.1.4-rc):
4922 - Our Travis configuration now uses Chutney to run some network
4923 integration tests automatically. Closes ticket 29280.
4925 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
4926 - When building on Appveyor and Travis, pass the "-k" flag to make,
4927 so that we are informed of all compilation failures, not just the
4928 first one or two. Closes ticket 31372.
4930 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4931 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4932 in December 2018 (of which ~122 were still functional), with a
4933 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4934 in June 2019. Closes ticket 28795.
4936 o Minor features (geoip, backport from 0.4.2.5):
4937 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4938 Country database. Closes ticket 32685.
4940 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
4941 - Try to log an error from NSS (if there is any) and a more useful
4942 description of our situation if we are using NSS and a call to
4943 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
4945 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4946 - Change "make test-stem" so it only runs the stem tests that use
4947 tor. This change makes test-stem faster and more reliable. Closes
4950 o Minor bugfixes (security, backport from 0.4.0.4-rc):
4951 - Verify in more places that we are not about to create a buffer
4952 with more than INT_MAX bytes, to avoid possible OOB access in the
4953 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
4954 fixed by Tobias Stoeckmann.
4955 - Fix a potential double free bug when reading huge bandwidth files.
4956 The issue is not exploitable in the current Tor network because
4957 the vulnerable code is only reached when directory authorities
4958 read bandwidth files, but bandwidth files come from a trusted
4959 source (usually the authorities themselves). Furthermore, the
4960 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
4961 which are not used by any of the current authorities. Fixes bug
4962 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
4965 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
4966 - Reset coverage state on disk after Travis CI has finished. This
4967 should prevent future coverage merge errors from causing the test
4968 suite for the "process" subsystem to fail. The process subsystem
4969 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
4971 - Terminate test-stem if it takes more than 9.5 minutes to run.
4972 (Travis terminates the job after 10 minutes of no output.)
4973 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
4975 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4976 - Avoid spurious errors when Appveyor CI fails before the install step.
4977 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4979 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4980 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4981 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4983 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
4984 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
4985 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
4988 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
4989 - Fix a logic error that prevented the SessionGroup sub-option from
4990 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
4992 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4993 - Fix a BUG() assertion that occurs within a very small race window
4994 between when a client intro circuit opens and when its descriptor
4995 gets cleaned up from the cache. The circuit is now closed early,
4996 which will trigger a re-fetch of the descriptor and continue the
4997 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4999 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
5000 - Don't believe clock skew results from NETINFO cells that appear to
5001 arrive before we sent the VERSIONS cells they are responding to.
5002 Previously, we would accept them up to 3 minutes "in the past".
5003 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5005 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
5006 - Fix a compilation warning on Windows about casting a function
5007 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5010 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
5011 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
5012 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
5014 o Minor bugfixes (compilation, backport from 0.4.1.5):
5015 - Avoid using labs() on time_t, which can cause compilation warnings
5016 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5018 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5019 - Suppress spurious float-conversion warnings from GCC when calling
5020 floating-point classifier functions on FreeBSD. Fixes part of bug
5021 31687; bugfix on 0.3.1.5-alpha.
5023 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
5024 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5025 due to missing declarations of abort(), and prevent other such
5026 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5028 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
5029 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5030 want authentication along with configured (but unused!)
5031 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5033 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
5034 - Avoid trying to read data from closed connections, which can cause
5035 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5036 30344; bugfix on 0.1.1.1-alpha.
5038 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
5039 - Allow the test-stem job to fail in Travis, because it sometimes
5040 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5041 - Skip test_rebind on macOS in Travis, because it is unreliable on
5042 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5043 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5044 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5046 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
5047 - Avoid a set of possible code paths that could try to use freed
5048 memory in routerlist_free() while Tor was exiting. Fixes bug
5049 31003; bugfix on 0.1.2.2-alpha.
5051 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
5052 - Stop crashing after parsing an unknown descriptor purpose
5053 annotation. We think this bug can only be triggered by modifying a
5054 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5056 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
5057 - Move the "bandwidth-file-headers" line in directory authority
5058 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5061 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
5062 - On abort, try harder to flush the output buffers of log messages.
5063 On some platforms (macOS), log messages could be discarded when
5064 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5065 - Report the tor version whenever an assertion fails. Previously, we
5066 only reported the Tor version on some crashes, and some non-fatal
5067 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5069 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5070 - When extracting an IPv6 address from a PF-based proxy, verify that
5071 we are actually configured to receive an IPv6 address, and log an
5072 internal error if not. Fixes part of bug 31687; bugfix
5075 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5076 - When tor is missing descriptors for some primary entry guards,
5077 make the log message less alarming. It's normal for descriptors to
5078 expire, as long as tor fetches new ones soon after. Fixes bug
5079 31657; bugfix on 0.3.3.1-alpha.
5081 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
5082 - Avoid logging that we are relaxing a circuit timeout when that
5083 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
5085 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
5086 - Correct a misleading error message when IPv4Only or IPv6Only is
5087 used but the resolved address can not be interpreted as an address
5088 of the specified IP version. Fixes bug 13221; bugfix on
5089 0.2.3.9-alpha. Patch from Kris Katterjohn.
5090 - Log the correct port number for listening sockets when "auto" is
5091 used to let Tor pick the port number. Previously, port 0 was
5092 logged instead of the actual port number. Fixes bug 29144; bugfix
5093 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
5094 - Stop logging a BUG() warning when Tor is waiting for exit
5095 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
5097 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
5098 - Do not log a warning when running with an OpenSSL version other
5099 than the one Tor was compiled with, if the two versions should be
5100 compatible. Previously, we would warn whenever the version was
5101 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5103 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5104 - Change log level of message "Hash of session info was not as
5105 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5108 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
5109 - Rate-limit our the logging message about the obsolete .exit
5110 notation. Previously, there was no limit on this warning, which
5111 could potentially be triggered many times by a hostile website.
5112 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5114 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
5115 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5116 cell on a connection using the obsolete v1 link protocol. Log a
5117 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5119 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
5120 - Reset the periodic events' "enabled" flag when Tor is shut down
5121 cleanly. Previously, this flag was left on, which caused periodic
5122 events not to be re-enabled when Tor was relaunched in-process
5123 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5126 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
5127 - Avoid a minor memory leak that could occur on relays when failing
5128 to create a "keys" directory. Fixes bug 30148; bugfix
5131 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
5132 - Fix a trivial memory leak when parsing an invalid value
5133 from a download schedule in the configuration. Fixes bug
5134 30894; bugfix on 0.3.4.1-alpha.
5136 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
5137 - Refactor the shared random state's memory management so that it
5138 actually takes ownership of the shared random value pointers.
5139 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
5141 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
5142 - Stop leaking parts of the shared random state in the shared-random
5143 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
5145 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
5146 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5147 implemenation) when failing to load an onion service client
5148 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5150 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
5151 - When purging the DNS cache because of an out-of-memory condition,
5152 try purging just the older entries at first. Previously, we would
5153 always purge the whole thing. Fixes bug 29617; bugfix
5156 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
5157 - Avoid crashing in our tor_vasprintf() implementation on systems
5158 that define neither vasprintf() nor _vscprintf(). (This bug has
5159 been here long enough that we question whether people are running
5160 Tor on such systems, but we're applying the fix out of caution.)
5161 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5164 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
5165 - Avoid crashing when starting with a corrupt keys directory where
5166 the old ntor key and the new ntor key are identical. Fixes bug
5167 30916; bugfix on 0.2.4.8-alpha.
5169 o Minor bugfixes (rust, backport from 0.4.0.5):
5170 - Abort on panic in all build profiles, instead of potentially
5171 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5173 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5174 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5175 31463; bugfix on 0.3.5.4-alpha.
5177 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
5178 - Allow connections to single onion services to remain idle without
5179 being disconnected. Previously, relays acting as rendezvous points
5180 for single onion services were mistakenly closing idle rendezvous
5181 circuits after 60 seconds, thinking that they were unused
5182 directory-fetching circuits that had served their purpose. Fixes
5183 bug 29665; bugfix on 0.2.1.26.
5185 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
5186 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
5187 relay and bridge extra-info documents. Fixes bug 29017; bugfix
5190 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
5191 - Downgrade some LOG_ERR messages in the address/* tests to
5192 warnings. The LOG_ERR messages were occurring when we had no
5193 configured network. We were failing the unit tests, because we
5194 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
5195 29530; bugfix on 0.3.5.8.
5196 - Fix our gcov wrapper script to look for object files at the
5197 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
5199 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
5200 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5201 recent test-network.sh to use new chutney features in CI. Fixes
5202 bug 29703; bugfix on 0.2.9.1-alpha.
5203 - Fix a test failure on Windows caused by an unexpected "BUG"
5204 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5207 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
5208 - When testing port rebinding, don't busy-wait for tor to log.
5209 Instead, actually sleep for a short time before polling again.
5210 Also improve the formatting of control commands and log messages.
5211 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5213 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
5214 - When classifying a client's selection of TLS ciphers, if the
5215 client ciphers are not yet available, do not cache the result.
5216 Previously, we had cached the unavailability of the cipher list
5217 and never looked again, which in turn led us to assume that the
5218 client only supported the ancient V1 link protocol. This, in turn,
5219 was causing Stem integration tests to stall in some cases. Fixes
5220 bug 30021; bugfix on 0.2.4.8-alpha.
5222 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
5223 - Log bugs about the TLS read buffer's length only once, rather than
5224 filling the logs with similar warnings. Fixes bug 31939; bugfix
5227 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5228 - Always retry v2 single onion service intro and rend circuits with
5229 a 3-hop path. Previously, v2 single onion services used a 3-hop
5230 path when rendezvous circuits were retried after a remote or
5231 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5232 23818; bugfix on 0.2.9.3-alpha.
5233 - Make v3 single onion services fall back to a 3-hop intro, when all
5234 intro points are unreachable via a 1-hop path. Previously, v3
5235 single onion services failed when all intro nodes were unreachable
5236 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5238 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
5239 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
5240 Windows Server 2012 R2 job. The remaining 2 jobs still provide
5241 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
5242 fast_finish, so failed jobs terminate the build immediately. Fixes
5243 bug 29601; bugfix on 0.3.5.4-alpha.
5245 o Documentation (backport from 0.4.2.1-alpha):
5246 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5247 notice.html so that operators no longer have to host it
5248 themselves. Closes ticket 31089.
5250 o Testing (backport from 0.4.1.2-alpha):
5251 - Specify torrc paths (with empty files) when launching tor in
5252 integration tests; refrain from reading user and system torrcs.
5253 Resolves issue 29702.
5255 o Testing (continuous integration, backport from 0.4.1.1-alpha):
5256 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5258 o Testing (continuous integration, backport from 0.4.1.5):
5259 - In Travis, make stem log a controller trace to the console, and
5260 tail stem's tor log after failure. Closes ticket 30591.
5261 - In Travis, only run the stem tests that use a tor binary. Closes
5264 o Testing (continuous integration, backport from 0.4.2.3-alpha):
5265 - Disable all but one Travis CI macOS build, to mitigate slow
5266 scheduling of Travis macOS jobs. Closes ticket 32177.
5267 - Run the chutney IPv6 networks as part of Travis CI. Closes
5269 - Simplify the Travis CI build matrix, and optimise for build time.
5270 Closes ticket 31859.
5271 - Use Windows Server 2019 instead of Windows Server 2016 in our
5272 Appveyor builds. Closes ticket 32086.
5274 o Testing (continuous integration, backport from 0.4.2.4-rc):
5275 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5276 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5277 until we can fix some Bionic permissions issues (see ticket
5278 32240). Related to ticket 31919.
5279 - Install the mingw OpenSSL package in Appveyor. This makes sure
5280 that the OpenSSL headers and libraries match in Tor's Appveyor
5281 builds. (This bug was triggered by an Appveyor image update.)
5282 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5283 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5285 o Testing (continuous integration, backport from 0.4.2.5):
5286 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
5287 extensions. Also activates clang's -Wtypedef-redefinition warnings.
5288 Build some jobs with -std=gnu99, and some jobs without.
5289 Closes ticket 32500.
5291 Changes in version 0.4.2.4-rc - 2019-11-15
5292 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
5293 several bugs from earlier versions, including a few that would result in
5294 stack traces or incorrect behavior.
5296 o Minor features (build system):
5297 - Make pkg-config use --prefix when cross-compiling, if
5298 PKG_CONFIG_PATH is not set. Closes ticket 32191.
5300 o Minor features (geoip):
5301 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
5302 Country database. Closes ticket 32440.
5304 o Minor bugfixes (client, onion service v3):
5305 - Fix a BUG() assertion that occurs within a very small race window
5306 between when a client intro circuit opens and when its descriptor
5307 gets cleaned up from the cache. The circuit is now closed early,
5308 which will trigger a re-fetch of the descriptor and continue the
5309 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
5311 o Minor bugfixes (code quality):
5312 - Fix "make check-includes" so it runs correctly on out-of-tree
5313 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
5315 o Minor bugfixes (configuration):
5316 - Log the option name when skipping an obsolete option. Fixes bug
5317 32295; bugfix on 0.4.2.1-alpha.
5319 o Minor bugfixes (crash):
5320 - When running Tor with an option like --verify-config or
5321 --dump-config that does not start the event loop, avoid crashing
5322 if we try to exit early because of an error. Fixes bug 32407;
5323 bugfix on 0.3.3.1-alpha.
5325 o Minor bugfixes (directory):
5326 - When checking if a directory connection is anonymous, test if the
5327 circuit was marked for close before looking at its channel. This
5328 avoids a BUG() stacktrace if the circuit was previously closed.
5329 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
5331 o Minor bugfixes (shellcheck):
5332 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
5333 32402; bugfix on 0.4.2.1-alpha.
5334 - Start checking most scripts for shellcheck errors again. Fixes bug
5335 32402; bugfix on 0.4.2.1-alpha.
5337 o Testing (continuous integration):
5338 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
5339 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
5340 until we can fix some Bionic permissions issues (see ticket
5341 32240). Related to ticket 31919.
5342 - Install the mingw OpenSSL package in Appveyor. This makes sure
5343 that the OpenSSL headers and libraries match in Tor's Appveyor
5344 builds. (This bug was triggered by an Appveyor image update.)
5345 Fixes bug 32449; bugfix on 0.3.5.6-rc.
5346 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
5349 Changes in version 0.4.2.3-alpha - 2019-10-24
5350 This release fixes several bugs from the previous alpha release, and
5351 from earlier versions of Tor.
5353 o Major bugfixes (relay):
5354 - Relays now respect their AccountingMax bandwidth again. When
5355 relays entered "soft" hibernation (which typically starts when
5356 we've hit 90% of our AccountingMax), we had stopped checking
5357 whether we should enter hard hibernation. Soft hibernation refuses
5358 new connections and new circuits, but the existing circuits can
5359 continue, meaning that relays could have exceeded their configured
5360 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
5362 o Major bugfixes (v3 onion services):
5363 - Onion services now always use the exact number of intro points
5364 configured with the HiddenServiceNumIntroductionPoints option (or
5365 fewer if nodes are excluded). Before, a service could sometimes
5366 pick more intro points than configured. Fixes bug 31548; bugfix
5369 o Minor feature (onion services, control port):
5370 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
5371 (v3) onion services. Previously it defaulted to RSA1024 (v2).
5372 Closes ticket 29669.
5374 o Minor features (testing):
5375 - When running tests that attempt to look up hostnames, replace the
5376 libc name lookup functions with ones that do not actually touch
5377 the network. This way, the tests complete more quickly in the
5378 presence of a slow or missing DNS resolver. Closes ticket 31841.
5380 o Minor features (testing, continuous integration):
5381 - Disable all but one Travis CI macOS build, to mitigate slow
5382 scheduling of Travis macOS jobs. Closes ticket 32177.
5383 - Run the chutney IPv6 networks as part of Travis CI. Closes
5385 - Simplify the Travis CI build matrix, and optimise for build time.
5386 Closes ticket 31859.
5387 - Use Windows Server 2019 instead of Windows Server 2016 in our
5388 Appveyor builds. Closes ticket 32086.
5390 o Minor bugfixes (build system):
5391 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
5392 32124; bugfix on 0.3.4.1-alpha.
5393 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
5395 - Stop failing when jemalloc is requested, but tcmalloc is not
5396 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
5397 - When pkg-config is not installed, or a library that depends on
5398 pkg-config is not found, tell the user what to do to fix the
5399 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
5401 o Minor bugfixes (connections):
5402 - Avoid trying to read data from closed connections, which can cause
5403 needless loops in Libevent and infinite loops in Shadow. Fixes bug
5404 30344; bugfix on 0.1.1.1-alpha.
5406 o Minor bugfixes (error handling):
5407 - Always lock the backtrace buffer before it is used. Fixes bug
5408 31734; bugfix on 0.2.5.3-alpha.
5410 o Minor bugfixes (mainloop, periodic events, in-process API):
5411 - Reset the periodic events' "enabled" flag when Tor is shut down
5412 cleanly. Previously, this flag was left on, which caused periodic
5413 events not to be re-enabled when Tor was relaunched in-process
5414 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
5417 o Minor bugfixes (process management):
5418 - Remove overly strict assertions that triggered when a pluggable
5419 transport failed to launch. Fixes bug 31091; bugfix
5421 - Remove an assertion in the Unix process backend. This assertion
5422 would trigger when we failed to find the executable for a child
5423 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
5425 o Minor bugfixes (testing):
5426 - Avoid intermittent test failures due to a test that had relied on
5427 inconsistent timing sources. Fixes bug 31995; bugfix
5429 - When testing port rebinding, don't busy-wait for tor to log.
5430 Instead, actually sleep for a short time before polling again.
5431 Also improve the formatting of control commands and log messages.
5432 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
5434 o Minor bugfixes (tls, logging):
5435 - Log bugs about the TLS read buffer's length only once, rather than
5436 filling the logs with similar warnings. Fixes bug 31939; bugfix
5439 o Minor bugfixes (v3 onion services):
5440 - Fix an implicit conversion from ssize_t to size_t discovered by
5441 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
5442 - Fix a memory leak in an unlikely error code path when encoding HS
5443 DoS establish intro extension cell. Fixes bug 32063; bugfix
5445 - When cleaning up intro circuits for a v3 onion service, don't
5446 remove circuits that have an established or pending circuit, even
5447 if they ran out of retries. This way, we don't remove a circuit on
5448 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
5451 - Correct the description of "GuardLifetime". Fixes bug 31189;
5452 bugfix on 0.3.0.1-alpha.
5453 - Make clear in the man page, in both the bandwidth section and the
5454 AccountingMax section, that Tor counts in powers of two, not
5455 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
5456 bytes. Resolves ticket 32106.
5459 Changes in version 0.4.2.2-alpha - 2019-10-07
5460 This release fixes several bugs from the previous alpha release, and
5461 from earlier versions. It also includes a change in authorities, so
5462 that they begin to reject the currently unsupported release series.
5464 o Major features (directory authorities):
5465 - Directory authorities now reject relays running all currently
5466 deprecated release series. The currently supported release series
5467 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
5469 o Major bugfixes (embedded Tor):
5470 - Avoid a possible crash when restarting Tor in embedded mode and
5471 enabling a different set of publish/subscribe messages. Fixes bug
5472 31898; bugfix on 0.4.1.1-alpha.
5474 o Major bugfixes (torrc parsing):
5475 - Stop ignoring torrc options after an %include directive, when the
5476 included directory ends with a file that does not contain any
5477 config options (but does contain comments or whitespace). Fixes
5478 bug 31408; bugfix on 0.3.1.1-alpha.
5480 o Minor features (auto-formatting scripts):
5481 - When annotating C macros, never generate a line that our check-
5482 spaces script would reject. Closes ticket 31759.
5483 - When annotating C macros, try to remove cases of double-negation.
5484 Closes ticket 31779.
5486 o Minor features (continuous integration):
5487 - When building on Appveyor and Travis, pass the "-k" flag to make,
5488 so that we are informed of all compilation failures, not just the
5489 first one or two. Closes ticket 31372.
5491 o Minor features (geoip):
5492 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
5493 Country database. Closes ticket 31931.
5495 o Minor features (maintenance scripts):
5496 - Add a Coccinelle script to detect bugs caused by incrementing or
5497 decrementing a variable inside a call to log_debug(). Since
5498 log_debug() is a macro whose arguments are conditionally
5499 evaluated, it is usually an error to do this. One such bug was
5500 30628, in which SENDME cells were miscounted by a decrement
5501 operator inside a log_debug() call. Closes ticket 30743.
5503 o Minor features (onion services v3):
5504 - Assist users who try to setup v2 client authorization in v3 onion
5505 services by pointing them to the right documentation. Closes
5508 o Minor bugfixes (Appveyor continuous integration):
5509 - Avoid spurious errors when Appveyor CI fails before the install
5510 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
5512 o Minor bugfixes (best practices tracker):
5513 - When listing overbroad exceptions, do not also list problems, and
5514 do not list insufficiently broad exceptions. Fixes bug 31338;
5515 bugfix on 0.4.2.1-alpha.
5517 o Minor bugfixes (controller protocol):
5518 - Fix the MAPADDRESS controller command to accept one or more
5519 arguments. Previously, it required two or more arguments, and
5520 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5522 o Minor bugfixes (logging):
5523 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
5524 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
5525 - Disable backtrace signal handlers when shutting down tor. Fixes
5526 bug 31614; bugfix on 0.2.5.2-alpha.
5527 - Rate-limit our the logging message about the obsolete .exit
5528 notation. Previously, there was no limit on this warning, which
5529 could potentially be triggered many times by a hostile website.
5530 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
5531 - When initialising log domain masks, only set known log domains.
5532 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
5534 o Minor bugfixes (logging, protocol violations):
5535 - Do not log a nonfatal assertion failure when receiving a VERSIONS
5536 cell on a connection using the obsolete v1 link protocol. Log a
5537 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
5539 o Minor bugfixes (modules):
5540 - Explain what the optional Directory Authority module is, and what
5541 happens when it is disabled. Fixes bug 31825; bugfix
5544 o Minor bugfixes (multithreading):
5545 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
5546 31736; bugfix on 0.0.7.
5548 o Minor bugfixes (relay):
5549 - Avoid crashing when starting with a corrupt keys directory where
5550 the old ntor key and the new ntor key are identical. Fixes bug
5551 30916; bugfix on 0.2.4.8-alpha.
5553 o Minor bugfixes (tests, SunOS):
5554 - Avoid a map_anon_nofork test failure due to a signed/unsigned
5555 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
5557 o Code simplification and refactoring:
5558 - Refactor connection_control_process_inbuf() to reduce the size of
5559 a practracker exception. Closes ticket 31840.
5560 - Refactor the microdescs_parse_from_string() function into smaller
5561 pieces, for better comprehensibility. Closes ticket 31675.
5562 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
5563 tests and fuzzers, rather than using hard-coded values. Closes
5565 - Interface for function `decrypt_desc_layer` cleaned up. Closes
5569 - Document the signal-safe logging behaviour in the tor man page.
5570 Also add some comments to the relevant functions. Closes
5572 - Explain why we can't destroy the backtrace buffer mutex. Explain
5573 why we don't need to destroy the log mutex. Closes ticket 31736.
5574 - The Tor source code repository now includes a (somewhat dated)
5575 description of Tor's modular architecture, in doc/HACKING/design.
5576 This is based on the old "tor-guts.git" repository, which we are
5577 adopting and superseding. Closes ticket 31849.
5580 Changes in version 0.4.1.6 - 2019-09-19
5581 This release backports several bugfixes to improve stability and
5582 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
5583 or experiencing reliability issues with single onion services, should
5586 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
5587 - Tolerate systems (including some Android installations) where
5588 madvise and MADV_DONTDUMP are available at build-time, but not at
5589 run time. Previously, these systems would notice a failed syscall
5590 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
5591 - Tolerate systems (including some Linux installations) where
5592 madvise and/or MADV_DONTFORK are available at build-time, but not
5593 at run time. Previously, these systems would notice a failed
5594 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
5596 o Minor features (stem tests, backport from 0.4.2.1-alpha):
5597 - Change "make test-stem" so it only runs the stem tests that use
5598 tor. This change makes test-stem faster and more reliable. Closes
5601 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
5602 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5603 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5605 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
5606 - Add more stub functions to fix compilation on Android with link-
5607 time optimization when --disable-module-dirauth is used.
5608 Previously, these compilation settings would make the compiler
5609 look for functions that didn't exist. Fixes bug 31552; bugfix
5611 - Suppress spurious float-conversion warnings from GCC when calling
5612 floating-point classifier functions on FreeBSD. Fixes part of bug
5613 31687; bugfix on 0.3.1.5-alpha.
5615 o Minor bugfixes (controller protocol):
5616 - Fix the MAPADDRESS controller command to accept one or more
5617 arguments. Previously, it required two or more arguments, and ignored
5618 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
5620 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
5621 - When extracting an IPv6 address from a PF-based proxy, verify that
5622 we are actually configured to receive an IPv6 address, and log an
5623 internal error if not. Fixes part of bug 31687; bugfix
5626 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
5627 - When tor is missing descriptors for some primary entry guards,
5628 make the log message less alarming. It's normal for descriptors to
5629 expire, as long as tor fetches new ones soon after. Fixes bug
5630 31657; bugfix on 0.3.3.1-alpha.
5632 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
5633 - Change log level of message "Hash of session info was not as
5634 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5637 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
5638 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5639 31463; bugfix on 0.3.5.4-alpha.
5641 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
5642 - Always retry v2 single onion service intro and rend circuits with
5643 a 3-hop path. Previously, v2 single onion services used a 3-hop
5644 path when rendezvous circuits were retried after a remote or
5645 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5646 23818; bugfix on 0.2.9.3-alpha.
5648 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
5649 - Always retry v3 single onion service intro and rend circuits with
5650 a 3-hop path. Previously, v3 single onion services used a 3-hop
5651 path when rend circuits were retried after a remote or delayed
5652 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
5653 bugfix on 0.3.2.1-alpha.
5654 - Make v3 single onion services fall back to a 3-hop intro, when all
5655 intro points are unreachable via a 1-hop path. Previously, v3
5656 single onion services failed when all intro nodes were unreachable
5657 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5659 o Documentation (backport from 0.4.2.1-alpha):
5660 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5661 notice.html so that operators no longer have to host it
5662 themselves. Closes ticket 31089.
5665 Changes in version 0.4.2.1-alpha - 2019-09-17
5666 This is the first alpha release in the 0.4.2.x series. It adds new
5667 defenses for denial-of-service attacks against onion services. It also
5668 includes numerous kinds of bugfixes and refactoring to help improve
5669 Tor's stability and ease of development.
5671 o Major features (onion service v3, denial of service):
5672 - Add onion service introduction denial of service defenses. Intro
5673 points can now rate-limit client introduction requests, using
5674 parameters that can be sent by the service within the
5675 ESTABLISH_INTRO cell. If the cell extension for this is not used,
5676 the intro point will honor the consensus parameters. Closes
5679 o Major bugfixes (circuit build, guard):
5680 - When considering upgrading circuits from "waiting for guard" to
5681 "open", always ignore circuits that are marked for close.
5682 Previously we could end up in the situation where a subsystem is
5683 notified of a circuit opening, but the circuit is still marked for
5684 close, leading to undesirable behavior. Fixes bug 30871; bugfix
5687 o Major bugfixes (crash, Linux, Android):
5688 - Tolerate systems (including some Android installations) where
5689 madvise and MADV_DONTDUMP are available at build-time, but not at
5690 run time. Previously, these systems would notice a failed syscall
5691 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
5692 - Tolerate systems (including some Linux installations) where
5693 madvise and/or MADV_DONTFORK are available at build-time, but not
5694 at run time. Previously, these systems would notice a failed
5695 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
5697 o Minor features (best practices tracker):
5698 - Our best-practices tracker now integrates with our include-checker
5699 tool to keep track of how many layering violations we have not yet
5700 fixed. We hope to reduce this number over time to improve Tor's
5701 modularity. Closes ticket 31176.
5702 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
5703 practracker from the environment. We may want this for continuous
5704 integration. Closes ticket 31309.
5705 - Give a warning rather than an error when a practracker exception
5706 is violated by a small amount, add a --list-overbroad option to
5707 practracker that lists exceptions that are stricter than they need
5708 to be, and provide an environment variable for disabling
5709 practracker. Closes ticket 30752.
5710 - Our best-practices tracker now looks at headers as well as C
5711 files. Closes ticket 31175.
5713 o Minor features (build system):
5714 - Add --disable-manpage and --disable-html-manual options to
5715 configure script. This will enable shortening build times by not
5716 building documentation. Resolves issue 19381.
5718 o Minor features (compilation):
5719 - Log a more useful error message when we are compiling and one of
5720 the compile-time hardening options we have selected can be linked
5721 but not executed. Closes ticket 27530.
5723 o Minor features (configuration):
5724 - The configuration code has been extended to allow splitting
5725 configuration data across multiple objects. Previously, all
5726 configuration data needed to be kept in a single object, which
5727 tended to become bloated. Closes ticket 31240.
5729 o Minor features (continuous integration):
5730 - When running CI builds on Travis, put some random data in
5731 ~/.torrc, to make sure no tests are reading the Tor configuration
5732 file from its default location. Resolves issue 30102.
5734 o Minor features (debugging):
5735 - Log a nonfatal assertion failure if we encounter a configuration
5736 line whose command is "CLEAR" but which has a nonempty value. This
5737 should be impossible, according to the rules of our configuration
5738 line parsing. Closes ticket 31529.
5740 o Minor features (git hooks):
5741 - Our pre-commit git hook now checks for a special file before
5742 running practracker, so that practracker only runs on branches
5743 that are based on master. Since the pre-push hook calls the pre-
5744 commit hook, practracker will also only run before pushes of
5745 branches based on master. Closes ticket 30979.
5747 o Minor features (git scripts):
5748 - Add a "--" command-line argument, to separate git-push-all.sh
5749 script arguments from arguments that are passed through to git
5750 push. Closes ticket 31314.
5751 - Add a -r <remote-name> argument to git-push-all.sh, so the script
5752 can push test branches to a personal remote. Closes ticket 31314.
5753 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
5754 git-push-all.sh, which makes these scripts create, merge forward,
5755 and push test branches. Closes ticket 31314.
5756 - Add a -u argument to git-merge-forward.sh, so that the script can
5757 re-use existing test branches after a merge failure and fix.
5758 Closes ticket 31314.
5759 - Add a TOR_GIT_PUSH env var, which sets the default git push
5760 command and arguments for git-push-all.sh. Closes ticket 31314.
5761 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
5762 script push master and maint branches with a delay between each
5763 branch. These delays trigger the CI jobs in a set order, which
5764 should show the most likely failures first. Also make pushes
5765 atomic by default, and make the script pass any command-line
5766 arguments to git push. Closes ticket 29879.
5767 - Call the shellcheck script from the pre-commit hook. Closes
5769 - Skip pushing test branches that are the same as a remote
5770 maint/release/master branch in git-push-all.sh by default. Add a
5771 -s argument, so git-push-all.sh can push all test branches. Closes
5774 o Minor features (IPv6, logging):
5775 - Log IPv6 addresses as well as IPv4 addresses when describing
5776 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
5778 o Minor features (onion service v3):
5779 - Do not allow single hop clients to fetch or post an HS descriptor
5780 from an HSDir. Closes ticket 24964.
5782 o Minor features (onion service):
5783 - Disallow single-hop clients at the introduction point. We've
5784 removed Tor2web support a while back and single-hop rendezvous
5785 attempts are blocked at the relays. This change should remove load
5786 off the network from spammy clients. Close ticket 24963.
5788 o Minor features (stem tests):
5789 - Change "make test-stem" so it only runs the stem tests that use
5790 tor. This change makes test-stem faster and more reliable. Closes
5793 o Minor features (testing):
5794 - Add a script to invoke "tor --dump-config" and "tor
5795 --verify-config" with various configuration options, and see
5796 whether tor's resulting configuration or error messages are what
5797 we expect. Use it for integration testing of our +Option and
5798 /Option flags. Closes ticket 31637.
5799 - Improve test coverage for our existing configuration parsing and
5800 management API. Closes ticket 30893.
5801 - Add integration tests to make sure that practracker gives the
5802 outputs we expect. Closes ticket 31477.
5803 - The practracker self-tests are now run as part of the Tor test
5804 suite. Closes ticket 31304.
5806 o Minor features (token bucket):
5807 - Implement a generic token bucket that uses a single counter, for
5808 use in anti-DoS onion service work. Closes ticket 30687.
5810 o Minor bugfixes (best practices tracker):
5811 - Fix a few issues in the best-practices script, including tests,
5812 tab tolerance, error reporting, and directory-exclusion logic.
5813 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
5814 - When running check-best-practices, only consider files in the src
5815 subdirectory. Previously we had recursively considered all
5816 subdirectories, which made us get confused by the temporary
5817 directories made by "make distcheck". Fixes bug 31578; bugfix
5820 o Minor bugfixes (build system):
5821 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
5822 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
5824 o Minor bugfixes (chutney, makefiles, documentation):
5825 - "make test-network-all" now shows the warnings from each test-
5826 network.sh run on the console, so developers see new warnings
5827 early. We've also improved the documentation for this feature, and
5828 renamed a Makefile variable so the code is self-documenting. Fixes
5829 bug 30455; bugfix on 0.3.0.4-rc.
5831 o Minor bugfixes (compilation):
5832 - Add more stub functions to fix compilation on Android with link-
5833 time optimization when --disable-module-dirauth is used.
5834 Previously, these compilation settings would make the compiler
5835 look for functions that didn't exist. Fixes bug 31552; bugfix
5837 - Suppress spurious float-conversion warnings from GCC when calling
5838 floating-point classifier functions on FreeBSD. Fixes part of bug
5839 31687; bugfix on 0.3.1.5-alpha.
5841 o Minor bugfixes (configuration):
5842 - Invalid floating-point values in the configuration file are now
5843 treated as errors in the configuration. Previously, they were
5844 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
5846 o Minor bugfixes (coverity):
5847 - Add an assertion when parsing a BEGIN cell so that coverity can be
5848 sure that we are not about to dereference a NULL address. Fixes
5849 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
5850 - In our siphash implementation, when building for coverity, use
5851 memcpy in place of a switch statement, so that coverity can tell
5852 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
5853 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
5854 - Fix several coverity warnings from our unit tests. Fixes bug
5855 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
5857 o Minor bugfixes (developer tooling):
5858 - Only log git script changes in the post-merge script when the
5859 merge was to the master branch. Fixes bug 31040; bugfix
5862 o Minor bugfixes (directory authorities):
5863 - Return a distinct status when formatting annotations fails. Fixes
5864 bug 30780; bugfix on 0.2.0.8-alpha.
5866 o Minor bugfixes (error handling):
5867 - On abort, try harder to flush the output buffers of log messages.
5868 On some platforms (macOS), log messages could be discarded when
5869 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5870 - Report the tor version whenever an assertion fails. Previously, we
5871 only reported the Tor version on some crashes, and some non-fatal
5872 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
5873 - When tor aborts due to an error, close log file descriptors before
5874 aborting. Closing the logs makes some OSes flush log file buffers,
5875 rather than deleting buffered log lines. Fixes bug 31594; bugfix
5878 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
5879 - When extracting an IPv6 address from a PF-based proxy, verify that
5880 we are actually configured to receive an IPv6 address, and log an
5881 internal error if not. Fixes part of bug 31687; bugfix
5884 o Minor bugfixes (git hooks):
5885 - Remove a duplicate call to practracker from the pre-push hook. The
5886 pre-push hook already calls the pre-commit hook, which calls
5887 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
5889 o Minor bugfixes (git scripts):
5890 - Stop hard-coding the bash path in the git scripts. Some OSes don't
5891 have bash in /usr/bin, others have an ancient bash at this path.
5892 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
5893 - Stop hard-coding the tor master branch name and worktree path in
5894 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
5895 - Allow git-push-all.sh to be run from any directory. Previously,
5896 the script only worked if run from an upstream worktree directory.
5897 Closes ticket 31678.
5899 o Minor bugfixes (guards):
5900 - When tor is missing descriptors for some primary entry guards,
5901 make the log message less alarming. It's normal for descriptors to
5902 expire, as long as tor fetches new ones soon after. Fixes bug
5903 31657; bugfix on 0.3.3.1-alpha.
5905 o Minor bugfixes (ipv6):
5906 - Check for private IPv6 addresses alongside their IPv4 equivalents
5907 when authorities check descriptors. Previously, we only checked
5908 for private IPv4 addresses. Fixes bug 31088; bugfix on
5909 0.2.3.21-rc. Patch by Neel Chauhan.
5910 - When parsing microdescriptors, we should check the IPv6 exit
5911 policy alongside IPv4. Previously, we checked both exit policies
5912 for only router info structures, while microdescriptors were
5913 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
5916 o Minor bugfixes (logging):
5917 - Change log level of message "Hash of session info was not as
5918 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
5920 - Fix a code issue that would have broken our parsing of log domains
5921 as soon as we had 33 of them. Fortunately, we still only have 29.
5922 Fixes bug 31451; bugfix on 0.4.1.4-rc.
5924 o Minor bugfixes (memory management):
5925 - Stop leaking a small amount of memory in nt_service_install(), in
5926 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
5929 o Minor bugfixes (networking, IP addresses):
5930 - When parsing addresses via Tor's internal DNS lookup API, reject
5931 IPv4 addresses in square brackets, and accept IPv6 addresses in
5932 square brackets. This change completes the work started in 23082,
5933 making address parsing consistent between tor's internal DNS
5934 lookup and address parsing APIs. Fixes bug 30721; bugfix
5936 - When parsing addresses via Tor's internal address:port parsing and
5937 DNS lookup APIs, require IPv6 addresses with ports to have square
5938 brackets. But allow IPv6 addresses without ports, whether or not
5939 they have square brackets. Fixes bug 30721; bugfix
5942 o Minor bugfixes (onion service v3):
5943 - When purging the client descriptor cache, close any introduction
5944 point circuits associated with purged cache entries. This avoids
5945 picking those circuits later when connecting to the same
5946 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
5948 o Minor bugfixes (onion services):
5949 - In the hs_ident_circuit_t data structure, remove the unused field
5950 circuit_type and the respective argument in hs_ident_circuit_new().
5951 This field was set by clients (for introduction) and services (for
5952 introduction and rendezvous) but was never used afterwards. Fixes
5953 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
5955 o Minor bugfixes (operator tools):
5956 - Make tor-print-ed-signing-cert(1) print certificate expiration
5957 date in RFC 1123 and UNIX timestamp formats, to make output
5958 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
5960 o Minor bugfixes (rust):
5961 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5962 31463; bugfix on 0.3.5.4-alpha.
5963 - Raise the minimum rustc version to 1.31.0, as checked by configure
5964 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
5966 o Minor bugfixes (sendme, code structure):
5967 - Rename the trunnel SENDME file definition from sendme.trunnel to
5968 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
5969 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
5971 o Minor bugfixes (statistics):
5972 - Stop removing the ed25519 signature if the extra info file is too
5973 big. If the signature data was removed, but the keyword was kept,
5974 this could result in an unparseable extra info file. Fixes bug
5975 30958; bugfix on 0.2.7.2-alpha.
5977 o Minor bugfixes (subsystems):
5978 - Make the subsystem init order match the subsystem module
5979 dependencies. Call windows process security APIs as early as
5980 possible. Initialize logging before network and time, so that
5981 network and time can use logging. Fixes bug 31615; bugfix
5984 o Minor bugfixes (testing):
5985 - Teach the util/socketpair_ersatz test to work correctly when we
5986 have no network stack configured. Fixes bug 30804; bugfix
5989 o Minor bugfixes (v2 single onion services):
5990 - Always retry v2 single onion service intro and rend circuits with
5991 a 3-hop path. Previously, v2 single onion services used a 3-hop
5992 path when rendezvous circuits were retried after a remote or
5993 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5994 23818; bugfix on 0.2.9.3-alpha.
5996 o Minor bugfixes (v3 single onion services):
5997 - Always retry v3 single onion service intro and rend circuits with
5998 a 3-hop path. Previously, v3 single onion services used a 3-hop
5999 path when rend circuits were retried after a remote or delayed
6000 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
6001 bugfix on 0.3.2.1-alpha.
6002 - Make v3 single onion services fall back to a 3-hop intro, when all
6003 intro points are unreachable via a 1-hop path. Previously, v3
6004 single onion services failed when all intro nodes were unreachable
6005 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
6008 - Improve documentation in circuit padding subsystem. Patch by
6009 Tobias Pulls. Closes ticket 31113.
6010 - Include an example usage for IPv6 ORPort in our sample torrc.
6011 Closes ticket 31320; patch from Ali Raheem.
6012 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
6013 notice.html so that operators no longer have to host it
6014 themselves. Closes ticket 31089.
6017 - No longer include recommended package digests in votes as detailed
6018 in proposal 301. The RecommendedPackages torrc option is
6019 deprecated and will no longer have any effect. "package" lines
6020 will still be considered when computing consensuses for consensus
6021 methods that include them. (This change has no effect on the list
6022 of recommended Tor versions, which is still in use.) Closes
6024 - Remove torctl.in from contrib/dist directory. Resolves
6028 - Run shellcheck for all non-third-party shell scripts that are
6029 shipped with Tor. Closes ticket 29533.
6030 - When checking shell scripts, ignore any user-created directories.
6031 Closes ticket 30967.
6033 o Code simplification and refactoring (config handling):
6034 - Extract our variable manipulation code from confparse.c to a new
6035 lower-level typedvar.h module. Closes ticket 30864.
6036 - Lower another layer of object management from confparse.c to a
6037 more general tool. Now typed structure members are accessible via
6038 an abstract type. Implements ticket 30914.
6039 - Move our backend logic for working with configuration and state
6040 files into a lower-level library, since it no longer depends on
6041 any tor-specific functionality. Closes ticket 31626.
6042 - Numerous simplifications in configuration-handling logic: remove
6043 duplicated macro definitions, replace magical names with flags,
6044 and refactor "TestingTorNetwork" to use the same default-option
6045 logic as the rest of Tor. Closes ticket 30935.
6046 - Replace our ad-hoc set of flags for configuration variables and
6047 configuration variable types with fine-grained orthogonal flags
6048 corresponding to the actual behavior we want. Closes ticket 31625.
6050 o Code simplification and refactoring (misc):
6051 - Eliminate some uses of lower-level control reply abstractions,
6052 primarily in the onion_helper functions. Closes ticket 30889.
6053 - Rework bootstrap tracking to use the new publish-subscribe
6054 subsystem. Closes ticket 29976.
6055 - Rewrite format_node_description() and router_get_verbose_nickname()
6056 to use strlcpy() and strlcat(). The previous implementation used
6057 memcpy() and pointer arithmetic, which was error-prone. Closes
6058 ticket 31545. This is CID 1452819.
6059 - Split extrainfo_dump_to_string() into smaller functions. Closes
6061 - Use the ptrdiff_t type consistently for expressing variable
6062 offsets and pointer differences. Previously we incorrectly (but
6063 harmlessly) used int and sometimes off_t for these cases. Closes
6065 - Use the subsystems mechanism to manage the main event loop code.
6066 Closes ticket 30806.
6067 - Various simplifications and minor improvements to the circuit
6068 padding machines. Patch by Tobias Pulls. Closes tickets 31112
6071 o Documentation (hard-coded directories):
6072 - Improve the documentation for the DirAuthority and FallbackDir
6073 torrc options. Closes ticket 30955.
6075 o Documentation (tor.1 man page):
6076 - Fix typo in tor.1 man page: the option is "--help", not "-help".
6077 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
6080 Changes in version 0.4.1.5 - 2019-08-20
6081 This is the first stable release in the 0.4.1.x series. This series
6082 adds experimental circuit-level padding, authenticated SENDME cells to
6083 defend against certain attacks, and several performance improvements
6084 to save on CPU consumption. It fixes bugs in bootstrapping and v3
6085 onion services. It also includes numerous smaller features and
6086 bugfixes on earlier versions.
6088 Per our support policy, we will support the 0.4.1.x series for nine
6089 months, or until three months after the release of a stable 0.4.2.x:
6090 whichever is longer. If you need longer-term support, please stick
6091 with 0.3.5.x, which will we plan to support until Feb 2022.
6093 Below are the changes since 0.4.1.4-rc. For a complete list of changes
6094 since 0.4.0.5, see the ReleaseNotes file.
6096 o Directory authority changes:
6097 - The directory authority "dizum" has a new IP address. Closes
6100 o Minor features (circuit padding logging):
6101 - Demote noisy client-side warn logs about circuit padding to
6102 protocol warnings. Add additional log messages and circuit ID
6103 fields to help with bug 30992 and any other future issues.
6105 o Minor bugfixes (circuit padding negotiation):
6106 - Bump the circuit padding protocol version to explicitly signify
6107 that the HS setup machine support is finalized in 0.4.1.x-stable.
6108 This also means that 0.4.1.x-alpha clients will not negotiate
6109 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
6110 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
6111 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
6113 o Minor bugfixes (circuit padding):
6114 - Ignore non-padding cells on padding circuits. This addresses
6115 various warning messages from subsystems that were not expecting
6116 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
6118 o Minor bugfixes (clock skew detection):
6119 - Don't believe clock skew results from NETINFO cells that appear to
6120 arrive before we sent the VERSIONS cells they are responding to.
6121 Previously, we would accept them up to 3 minutes "in the past".
6122 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6124 o Minor bugfixes (compatibility, standards compliance):
6125 - Fix a bug that would invoke undefined behavior on certain
6126 operating systems when trying to asprintf() a string exactly
6127 INT_MAX bytes long. We don't believe this is exploitable, but it's
6128 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
6129 Found and fixed by Tobias Stoeckmann.
6131 o Minor bugfixes (compilation warning):
6132 - Fix a compilation warning on Windows about casting a function
6133 pointer for GetTickCount64(). Fixes bug 31374; bugfix
6136 o Minor bugfixes (compilation):
6137 - Avoid using labs() on time_t, which can cause compilation warnings
6138 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
6140 o Minor bugfixes (distribution):
6141 - Do not ship any temporary files found in the
6142 scripts/maint/practracker directory. Fixes bug 31311; bugfix
6145 o Testing (continuous integration):
6146 - In Travis, make stem log a controller trace to the console, and
6147 tail stem's tor log after failure. Closes ticket 30591.
6148 - In Travis, only run the stem tests that use a tor binary. Closes
6152 Changes in version 0.4.1.4-rc - 2019-07-25
6153 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
6154 updates to a new list of fallback directories. If no new bugs are
6155 found, the next release in the 0.4.1.x serious should be stable.
6157 o Major bugfixes (circuit build, guard):
6158 - When considering upgrading circuits from "waiting for guard" to
6159 "open", always ignore circuits that are marked for close. Otherwise,
6160 we can end up in the situation where a subsystem is notified that
6161 a closing circuit has just opened, leading to undesirable
6162 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
6164 o Minor features (continuous integration):
6165 - Our Travis configuration now uses Chutney to run some network
6166 integration tests automatically. Closes ticket 29280.
6168 o Minor features (fallback directory list):
6169 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
6170 in December 2018 (of which ~122 were still functional), with a
6171 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
6172 in June 2019. Closes ticket 28795.
6174 o Minor bugfixes (circuit padding):
6175 - On relays, properly check that a padding machine is absent before
6176 logging a warning about it being absent. Fixes bug 30649; bugfix
6178 - Add two NULL checks in unreachable places to silence Coverity (CID
6179 144729 and 1447291) and better future-proof ourselves. Fixes bug
6180 31024; bugfix on 0.4.1.1-alpha.
6182 o Minor bugfixes (crash on exit):
6183 - Avoid a set of possible code paths that could try to use freed
6184 memory in routerlist_free() while Tor was exiting. Fixes bug
6185 31003; bugfix on 0.1.2.2-alpha.
6187 o Minor bugfixes (logging):
6188 - Fix a conflict between the flag used for messaging-domain log
6189 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
6192 o Minor bugfixes (memory leaks):
6193 - Fix a trivial memory leak when parsing an invalid value from a
6194 download schedule in the configuration. Fixes bug 30894; bugfix
6197 o Code simplification and refactoring:
6198 - Remove some dead code from circpad_machine_remove_token() to fix
6199 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
6203 Changes in version 0.4.1.3-alpha - 2019-06-25
6204 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
6205 alpha, most of them from earlier release series.
6207 o Major bugfixes (Onion service reachability):
6208 - Properly clean up the introduction point map when circuits change
6209 purpose from onion service circuits to pathbias, measurement, or
6210 other circuit types. This should fix some service-side instances
6211 of introduction point failure. Fixes bug 29034; bugfix
6214 o Minor features (geoip):
6215 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
6216 Country database. Closes ticket 30852.
6218 o Minor features (logging):
6219 - Give a more useful assertion failure message if we think we have
6220 minherit() but we fail to make a region non-inheritable. Give a
6221 compile-time warning if our support for minherit() is incomplete.
6222 Closes ticket 30686.
6224 o Minor bugfixes (circuit isolation):
6225 - Fix a logic error that prevented the SessionGroup sub-option from
6226 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
6228 o Minor bugfixes (continuous integration):
6229 - Allow the test-stem job to fail in Travis, because it sometimes
6230 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
6231 - Skip test_rebind on macOS in Travis, because it is unreliable on
6232 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6233 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
6234 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
6236 o Minor bugfixes (directory authorities):
6237 - Stop crashing after parsing an unknown descriptor purpose
6238 annotation. We think this bug can only be triggered by modifying a
6239 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
6241 o Minor bugfixes (pluggable transports):
6242 - When running as a bridge with pluggable transports, always publish
6243 pluggable transport information in our extrainfo descriptor, even
6244 if ExtraInfoStatistics is 0. This information is needed by
6245 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
6248 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
6249 Closes ticket 30630.
6252 Changes in version 0.4.1.2-alpha - 2019-06-06
6253 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
6254 previous alpha, and some much older. It also contains minor testing
6255 improvements, and an improvement to the security of our authenticated
6256 SENDME implementation.
6258 o Major bugfixes (bridges):
6259 - Consider our directory information to have changed when our list
6260 of bridges changes. Previously, Tor would not re-compute the
6261 status of its directory information when bridges changed, and
6262 therefore would not realize that it was no longer able to build
6263 circuits. Fixes part of bug 29875.
6264 - Do not count previously configured working bridges towards our
6265 total of working bridges. Previously, when Tor's list of bridges
6266 changed, it would think that the old bridges were still usable,
6267 and delay fetching router descriptors for the new ones. Fixes part
6268 of bug 29875; bugfix on 0.3.0.1-alpha.
6270 o Major bugfixes (flow control, SENDME):
6271 - Decrement the stream-level package window after packaging a cell.
6272 Previously, it was done inside a log_debug() call, meaning that if
6273 debug logs were not enabled, the decrement would never happen, and
6274 thus the window would be out of sync with the other end point.
6275 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
6277 o Major bugfixes (onion service reachability):
6278 - Properly clean up the introduction point map and associated state
6279 when circuits change purpose from onion service circuits to
6280 pathbias, measurement, or other circuit types. This may fix some
6281 instances of introduction point failure. Fixes bug 29034; bugfix
6284 o Minor features (authenticated SENDME):
6285 - Ensure that there is enough randomness on every circuit to prevent
6286 an attacker from successfully predicting the hashes they will need
6287 to include in authenticated SENDME cells. At a random interval, if
6288 we have not sent randomness already, we now leave some extra space
6289 at the end of a cell that we can fill with random bytes. Closes
6292 o Minor features (continuous integration):
6293 - When running coverage builds on Travis, we now set
6294 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
6297 o Minor features (maintenance):
6298 - Add a new "make autostyle" target that developers can use to apply
6299 all automatic Tor style and consistency conversions to the
6300 codebase. Closes ticket 30539.
6302 o Minor features (testing):
6303 - The circuitpadding tests now use a reproducible RNG implementation,
6304 so that if a test fails, we can learn why. Part of ticket 28878.
6305 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
6306 to set the RNG seed for tests that use a reproducible RNG. Part of
6308 - When running tests in coverage mode, take additional care to make
6309 our coverage deterministic, so that we can accurately track
6310 changes in code coverage. Closes ticket 30519.
6312 o Minor bugfixes (configuration, proxies):
6313 - Fix a bug that prevented us from supporting SOCKS5 proxies that
6314 want authentication along with configured (but unused!)
6315 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
6317 o Minor bugfixes (controller):
6318 - POSTDESCRIPTOR requests should work again. Previously, they were
6319 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
6321 - Repair the HSFETCH command so that it works again. Previously, it
6322 expected a body when it shouldn't have. Fixes bug 30646; bugfix
6325 o Minor bugfixes (developer tooling):
6326 - Fix pre-push hook to allow fixup and squash commits when pushing
6327 to non-upstream git remote. Fixes bug 30286; bugfix
6330 o Minor bugfixes (directory authority):
6331 - Move the "bandwidth-file-headers" line in directory authority
6332 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
6335 o Minor bugfixes (NetBSD):
6336 - Fix usage of minherit() on NetBSD and other platforms that define
6337 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
6338 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
6340 o Minor bugfixes (out-of-memory handler):
6341 - When purging the DNS cache because of an out-of-memory condition,
6342 try purging just the older entries at first. Previously, we would
6343 always purge the whole thing. Fixes bug 29617; bugfix
6346 o Minor bugfixes (portability):
6347 - Avoid crashing in our tor_vasprintf() implementation on systems
6348 that define neither vasprintf() nor _vscprintf(). (This bug has
6349 been here long enough that we question whether people are running
6350 Tor on such systems, but we're applying the fix out of caution.)
6351 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
6354 o Minor bugfixes (shutdown, libevent, memory safety):
6355 - Avoid use-after-free bugs when shutting down, by making sure that
6356 we shut down libevent only after shutting down all of its users.
6357 We believe these are harmless in practice, since they only occur
6358 on the shutdown path, and do not involve any attacker-controlled
6359 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
6361 o Minor bugfixes (static analysis):
6362 - Fix several spurious Coverity warnings about the unit tests, to
6363 lower our chances of missing real warnings in the future. Fixes
6364 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
6367 - Specify torrc paths (with empty files) when launching tor in
6368 integration tests; refrain from reading user and system torrcs.
6369 Resolves issue 29702.
6372 Changes in version 0.4.1.1-alpha - 2019-05-22
6373 This is the first alpha in the 0.4.1.x series. It introduces
6374 lightweight circuit padding to make some onion-service circuits harder
6375 to distinguish, includes a new "authenticated SENDME" feature to make
6376 certain denial-of-service attacks more difficult, and improves
6377 performance in several areas.
6379 o Major features (circuit padding):
6380 - Onion service clients now add padding cells at the start of their
6381 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
6382 look more like general purpose Exit traffic. The overhead for this
6383 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
6384 extra upstream cell and 10 downstream cells for INTRODUCE
6385 circuits. This feature is only enabled when also supported by the
6386 circuit's middle node. (Clients may specify fixed middle nodes
6387 with the MiddleNodes option, and may force-disable this feature
6388 with the CircuitPadding option.) Closes ticket 28634.
6390 o Major features (code organization):
6391 - Tor now includes a generic publish-subscribe message-passing
6392 subsystem that we can use to organize intermodule dependencies. We
6393 hope to use this to reduce dependencies between modules that don't
6394 need to be related, and to generally simplify our codebase. Closes
6397 o Major features (controller protocol):
6398 - Controller commands are now parsed using a generalized parsing
6399 subsystem. Previously, each controller command was responsible for
6400 parsing its own input, which led to strange inconsistencies.
6401 Closes ticket 30091.
6403 o Major features (flow control):
6404 - Implement authenticated SENDMEs as detailed in proposal 289. A
6405 SENDME cell now includes the digest of the traffic that it
6406 acknowledges, so that once an end point receives the SENDME, it
6407 can confirm the other side's knowledge of the previous cells that
6408 were sent, and prevent certain types of denial-of-service attacks.
6409 This behavior is controlled by two new consensus parameters: see
6410 the proposal for more details. Fixes ticket 26288.
6412 o Major features (performance):
6413 - Our node selection algorithm now excludes nodes in linear time.
6414 Previously, the algorithm was quadratic, which could slow down
6415 heavily used onion services. Closes ticket 30307.
6417 o Major features (performance, RNG):
6418 - Tor now constructs a fast secure pseudorandom number generator for
6419 each thread, to use when performance is critical. This PRNG is
6420 based on AES-CTR, using a buffering construction similar to
6421 libottery and the (newer) OpenBSD arc4random() code. It
6422 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
6423 small outputs. Although we believe it to be cryptographically
6424 strong, we are only using it when necessary for performance.
6425 Implements tickets 29023 and 29536.
6427 o Major bugfixes (onion service v3):
6428 - Fix an unreachable bug in which an introduction point could try to
6429 send an INTRODUCE_ACK with a status code that Trunnel would refuse
6430 to encode, leading the relay to assert(). We've consolidated the
6431 ABI values into Trunnel now. Fixes bug 30454; bugfix
6433 - Clients can now handle unknown status codes from INTRODUCE_ACK
6434 cells. (The NACK behavior will stay the same.) This will allow us
6435 to extend status codes in the future without breaking the normal
6436 client behavior. Fixes another part of bug 30454; bugfix
6439 o Minor features (circuit padding):
6440 - We now use a fast PRNG when scheduling circuit padding. Part of
6442 - Allow the padding machine designer to pick the edges of their
6443 histogram instead of trying to compute them automatically using an
6444 exponential formula. Resolves some undefined behavior in the case
6445 of small histograms and allows greater flexibility on machine
6446 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
6447 - Allow circuit padding machines to hold a circuit open until they
6448 are done padding it. Closes ticket 28780.
6450 o Minor features (compile-time modules):
6451 - Add a "--list-modules" command to print a list of which compile-
6452 time modules are enabled. Closes ticket 30452.
6454 o Minor features (continuous integration):
6455 - Remove sudo configuration lines from .travis.yml as they are no
6456 longer needed with current Travis build environment. Resolves
6458 - In Travis, show stem's tor log after failure. Closes ticket 30234.
6460 o Minor features (controller):
6461 - Add onion service version 3 support to the HSFETCH command.
6462 Previously, only version 2 onion services were supported. Closes
6463 ticket 25417. Patch by Neel Chauhan.
6465 o Minor features (debugging):
6466 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
6467 logging of additional information during assert failure. Now we
6468 can use format strings to include information for trouble
6469 shooting. Resolves ticket 29662.
6471 o Minor features (defense in depth):
6472 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
6473 case a bug causes them to be used later. Closes ticket 30176.
6474 Patch from Tobias Stoeckmann.
6475 - Tor now uses a cryptographically strong PRNG even for decisions
6476 that we do not believe are security-sensitive. Previously, for
6477 performance reasons, we had used a trivially predictable linear
6478 congruential generator algorithm for certain load-balancing and
6479 statistical sampling decisions. Now we use our fast RNG in those
6480 cases. Closes ticket 29542.
6482 o Minor features (developer tools):
6483 - Tor's "practracker" test script now checks for files and functions
6484 that seem too long and complicated. Existing overlong functions
6485 and files are accepted for now, but should eventually be
6486 refactored. Closes ticket 29221.
6487 - Add some scripts used for git maintenance to scripts/git. Closes
6489 - Call practracker from pre-push and pre-commit git hooks to let
6490 developers know if they made any code style violations. Closes
6492 - Add a script to check that each header has a well-formed and
6493 unique guard macro. Closes ticket 29756.
6495 o Minor features (geoip):
6496 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
6497 Country database. Closes ticket 30522.
6499 o Minor features (HTTP tunnel):
6500 - Return an informative web page when the HTTPTunnelPort is used as
6501 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
6503 o Minor features (IPv6, v3 onion services):
6504 - Make v3 onion services put IPv6 addresses in service descriptors.
6505 Before this change, service descriptors only contained IPv4
6506 addresses. Implements 26992.
6508 o Minor features (modularity):
6509 - The "--disable-module-dirauth" compile-time option now disables
6510 even more dirauth-only code. Closes ticket 30345.
6512 o Minor features (performance):
6513 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
6514 1.1.1 and later), since they tend to be faster than tiny-keccak.
6515 Closes ticket 28837.
6517 o Minor features (testing):
6518 - Tor's unit test code now contains helper functions to replace the
6519 PRNG with a deterministic or reproducible version for testing.
6520 Previously, various tests implemented this in various ways.
6521 Implements ticket 29732.
6522 - We now have a script, cov-test-determinism.sh, to identify places
6523 where our unit test coverage has become nondeterministic. Closes
6525 - Check that representative subsets of values of `int` and `unsigned
6526 int` can be represented by `void *`. Resolves issue 29537.
6528 o Minor bugfixes (bridge authority):
6529 - Bridge authorities now set bridges as running or non-running when
6530 about to dump their status to a file. Previously, they set bridges
6531 as running in response to a GETINFO command, but those shouldn't
6532 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
6533 Patch by Neel Chauhan.
6535 o Minor bugfixes (channel padding statistics):
6536 - Channel padding write totals and padding-enabled totals are now
6537 counted properly in relay extrainfo descriptors. Fixes bug 29231;
6538 bugfix on 0.3.1.1-alpha.
6540 o Minor bugfixes (circuit padding):
6541 - Add a "CircuitPadding" torrc option to disable circuit padding.
6542 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
6543 - Allow circuit padding machines to specify that they do not
6544 contribute much overhead, and provide consensus flags and torrc
6545 options to force clients to only use these low overhead machines.
6546 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
6547 - Provide a consensus parameter to fully disable circuit padding, to
6548 be used in emergency network overload situations. Fixes bug 30173;
6549 bugfix on 0.4.0.1-alpha.
6550 - The circuit padding subsystem will no longer schedule padding if
6551 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
6552 - Inspect a circuit-level cell queue before sending padding, to
6553 avoid sending padding while too much data is already queued. Fixes
6554 bug 29204; bugfix on 0.4.0.1-alpha.
6555 - Avoid calling monotime_absolute_usec() in circuit padding machines
6556 that do not use token removal or circuit RTT estimation. Fixes bug
6557 29085; bugfix on 0.4.0.1-alpha.
6559 o Minor bugfixes (compilation, unusual configurations):
6560 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
6561 due to missing declarations of abort(), and prevent other such
6562 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
6564 o Minor bugfixes (controller protocol):
6565 - Teach the controller parser to distinguish an object preceded by
6566 an argument list from one without. Previously, it couldn't
6567 distinguish an argument list from the first line of a multiline
6568 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
6570 o Minor bugfixes (directory authority, ipv6):
6571 - Directory authorities with IPv6 support now always mark themselves
6572 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
6573 Patch by Neel Chauhan.
6575 o Minor bugfixes (documentation):
6576 - Improve the documentation for using MapAddress with ".exit". Fixes
6577 bug 30109; bugfix on 0.1.0.1-rc.
6578 - Improve the monotonic time module and function documentation to
6579 explain what "monotonic" actually means, and document some results
6580 that have surprised people. Fixes bug 29640; bugfix
6582 - Use proper formatting when providing an example on quoting options
6583 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
6585 o Minor bugfixes (logging):
6586 - Do not log a warning when running with an OpenSSL version other
6587 than the one Tor was compiled with, if the two versions should be
6588 compatible. Previously, we would warn whenever the version was
6589 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
6590 - Warn operators when the MyFamily option is set but ContactInfo is
6591 missing, as the latter should be set too. Fixes bug 25110; bugfix
6594 o Minor bugfixes (memory leak):
6595 - Avoid a minor memory leak that could occur on relays when failing
6596 to create a "keys" directory. Fixes bug 30148; bugfix
6599 o Minor bugfixes (onion services):
6600 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
6601 implemenation) when failing to load an onion service client
6602 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
6603 - When refusing to launch a controller's HSFETCH request because of
6604 rate-limiting, respond to the controller with a new response,
6605 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
6606 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
6608 - When relaunching a circuit to a rendezvous service, mark the
6609 circuit as needing high-uptime routers as appropriate. Fixes bug
6610 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
6611 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
6612 (IPv6 support for v3 onion services is still incomplete: see
6613 ticket 23493 for details.) Fixes bug 23588; bugfix on
6614 0.3.2.1-alpha. Patch by Neel Chauhan.
6616 o Minor bugfixes (onion services, performance):
6617 - When building circuits to onion services, call tor_addr_parse()
6618 less often. Previously, we called tor_addr_parse() in
6619 circuit_is_acceptable() even if its output wasn't used. This
6620 change should improve performance when building circuits. Fixes
6621 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
6623 o Minor bugfixes (performance):
6624 - When checking whether a node is a bridge, use a fast check to make
6625 sure that its identity is set. Previously, we used a constant-time
6626 check, which is not necessary in this case. Fixes bug 30308;
6627 bugfix on 0.3.5.1-alpha.
6629 o Minor bugfixes (pluggable transports):
6630 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
6631 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
6633 o Minor bugfixes (probability distributions):
6634 - Refactor and improve parts of the probability distribution code
6635 that made Coverity complain. Fixes bug 29805; bugfix
6638 o Minor bugfixes (python):
6639 - Stop assuming that /usr/bin/python3 exists. For scripts that work
6640 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
6641 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
6643 o Minor bugfixes (relay):
6644 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
6645 is auto, act as if ExitRelay is 1. Previously, we would ignore
6646 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
6647 0.3.5.1-alpha. Patch by Neel Chauhan.
6649 o Minor bugfixes (stats):
6650 - When ExtraInfoStatistics is 0, stop including bandwidth usage
6651 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
6652 bridge statistics by country in extra-info documents. Fixes bug
6653 29018; bugfix on 0.2.4.1-alpha.
6655 o Minor bugfixes (testing):
6656 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
6657 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
6658 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
6659 - Fix some incorrect code in the v3 onion service unit tests. Fixes
6660 bug 29243; bugfix on 0.3.2.1-alpha.
6661 - In the "routerkeys/*" tests, check the return values of mkdir()
6662 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
6663 Found by Coverity as CID 1444254.
6664 - Split test_utils_general() into several smaller test functions.
6665 This makes it easier to perform resource deallocation on assert
6666 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
6667 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
6669 o Minor bugfixes (tor-resolve):
6670 - Fix a memory leak in tor-resolve that could happen if Tor gave it
6671 a malformed SOCKS response. (Memory leaks in tor-resolve don't
6672 actually matter, but it's good to fix them anyway.) Fixes bug
6673 30151; bugfix on 0.4.0.1-alpha.
6675 o Code simplification and refactoring:
6676 - Abstract out the low-level formatting of replies on the control
6677 port. Implements ticket 30007.
6678 - Add several assertions in an attempt to fix some Coverity
6679 warnings. Closes ticket 30149.
6680 - Introduce a connection_dir_buf_add() helper function that checks
6681 for compress_state of dir_connection_t and automatically writes a
6682 string to directory connection with or without compression.
6683 Resolves issue 28816.
6684 - Make the base32_decode() API return the number of bytes written,
6685 for consistency with base64_decode(). Closes ticket 28913.
6686 - Move most relay-only periodic events out of mainloop.c into the
6687 relay subsystem. Closes ticket 30414.
6688 - Refactor and encapsulate parts of the codebase that manipulate
6689 crypt_path_t objects. Resolves issue 30236.
6690 - Refactor several places in our code that Coverity incorrectly
6691 believed might have memory leaks. Closes ticket 30147.
6692 - Remove redundant return values in crypto_format, and the
6693 associated return value checks elsewhere in the code. Make the
6694 implementations in crypto_format consistent, and remove redundant
6695 code. Resolves ticket 29660.
6696 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
6697 it is not a constant-time function. Closes ticket 30309.
6698 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
6699 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
6700 bugfix on 0.3.2.1-alpha.
6701 - Simplify v3 onion service link specifier handling code. Fixes bug
6702 23576; bugfix on 0.3.2.1-alpha.
6703 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
6704 code. Resolves ticket 29108.
6705 - Split control.c into several submodules, in preparation for
6706 distributing its current responsibilities throughout the codebase.
6707 Closes ticket 29894.
6708 - Start to move responsibility for knowing about periodic events to
6709 the appropriate subsystems, so that the mainloop doesn't need to
6710 know all the periodic events in the rest of the codebase.
6711 Implements tickets 30293 and 30294.
6714 - Document how to find git commits and tags for bug fixes in
6715 CodingStandards.md. Update some file documentation. Closes
6719 - Remove the linux-tor-prio.sh script from contrib/operator-tools
6720 directory. Resolves issue 29434.
6721 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
6722 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
6725 o Code simplification and refactoring (shell scripts):
6726 - Clean up many of our shell scripts to fix shellcheck warnings.
6727 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
6728 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
6729 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
6730 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
6731 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
6732 nagios-check-tor-authority-cert (ticket 29071),
6733 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
6734 (ticket 29060), test_key_expiration.sh (ticket 30002),
6735 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
6738 o Testing (chutney):
6739 - In "make test-network-all", test IPv6-only v3 single onion
6740 services, using the chutney network single-onion-v23-ipv6-md.
6741 Closes ticket 27251.
6744 Changes in version 0.4.0.5 - 2019-05-02
6745 This is the first stable release in the 0.4.0.x series. It contains
6746 improvements for power management and bootstrap reporting, as well as
6747 preliminary backend support for circuit padding to prevent some kinds
6748 of traffic analysis. It also continues our work in refactoring Tor for
6749 long-term maintainability.
6751 Per our support policy, we will support the 0.4.0.x series for nine
6752 months, or until three months after the release of a stable 0.4.1.x:
6753 whichever is longer. If you need longer-term support, please stick
6754 with 0.3.5.x, which will we plan to support until Feb 2022.
6756 Below are the changes since 0.4.0.4-rc. For a complete list of changes
6757 since 0.3.5.7, see the ReleaseNotes file.
6759 o Minor features (continuous integration):
6760 - In Travis, tell timelimit to use stem's backtrace signals, and
6761 launch python directly from timelimit, so python receives the
6762 signals from timelimit, rather than make. Closes ticket 30117.
6764 o Minor features (diagnostic):
6765 - Add more diagnostic log messages in an attempt to solve the issue
6766 of NUL bytes appearing in a microdescriptor cache. Related to
6769 o Minor features (testing):
6770 - Use the approx_time() function when setting the "Expires" header
6771 in directory replies, to make them more testable. Needed for
6774 o Minor bugfixes (rust):
6775 - Abort on panic in all build profiles, instead of potentially
6776 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
6778 o Minor bugfixes (shellcheck):
6779 - Look for scripts in their correct locations during "make
6780 shellcheck". Previously we had looked in the wrong place during
6781 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
6783 o Minor bugfixes (testing):
6784 - Check the time in the "Expires" header using approx_time(). Fixes
6785 bug 30001; bugfix on 0.4.0.4-rc.
6787 o Minor bugfixes (UI):
6788 - Lower log level of unlink() errors during bootstrap. Fixes bug
6789 29930; bugfix on 0.4.0.1-alpha.
6792 Changes in version 0.4.0.4-rc - 2019-04-11
6793 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
6794 several bugs from earlier versions, including some that had affected
6795 stability, and one that prevented relays from working with NSS.
6797 o Major bugfixes (NSS, relay):
6798 - When running with NSS, disable TLS 1.2 ciphersuites that use
6799 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
6800 these ciphersuites don't work -- which caused relays to fail to
6801 handshake with one another when these ciphersuites were enabled.
6802 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
6804 o Minor features (bandwidth authority):
6805 - Make bandwidth authorities ignore relays that are reported in the
6806 bandwidth file with the flag "vote=0". This change allows us to
6807 report unmeasured relays for diagnostic reasons without including
6808 their bandwidth in the bandwidth authorities' vote. Closes
6810 - When a directory authority is using a bandwidth file to obtain the
6811 bandwidth values that will be included in the next vote, serve
6812 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
6815 o Minor features (circuit padding):
6816 - Stop warning about undefined behavior in the probability
6817 distribution tests. Float division by zero may technically be
6818 undefined behavior in C, but it's well defined in IEEE 754.
6819 Partial backport of 29298. Closes ticket 29527; bugfix
6822 o Minor features (continuous integration):
6823 - On Travis Rust builds, cleanup Rust registry and refrain from
6824 caching the "target/" directory to speed up builds. Resolves
6827 o Minor features (dormant mode):
6828 - Add a DormantCanceledByStartup option to tell Tor that it should
6829 treat a startup event as cancelling any previous dormant state.
6830 Integrators should use this option with caution: it should only be
6831 used if Tor is being started because of something that the user
6832 did, and not if Tor is being automatically started in the
6833 background. Closes ticket 29357.
6835 o Minor features (geoip):
6836 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
6837 Country database. Closes ticket 29992.
6839 o Minor features (NSS, diagnostic):
6840 - Try to log an error from NSS (if there is any) and a more useful
6841 description of our situation if we are using NSS and a call to
6842 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
6844 o Minor bugfixes (security):
6845 - Fix a potential double free bug when reading huge bandwidth files.
6846 The issue is not exploitable in the current Tor network because
6847 the vulnerable code is only reached when directory authorities
6848 read bandwidth files, but bandwidth files come from a trusted
6849 source (usually the authorities themselves). Furthermore, the
6850 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
6851 which are not used by any of the current authorities. Fixes bug
6852 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
6854 - Verify in more places that we are not about to create a buffer
6855 with more than INT_MAX bytes, to avoid possible OOB access in the
6856 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
6857 fixed by Tobias Stoeckmann.
6859 o Minor bugfix (continuous integration):
6860 - Reset coverage state on disk after Travis CI has finished. This
6861 should prevent future coverage merge errors from causing the test
6862 suite for the "process" subsystem to fail. The process subsystem
6863 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
6865 - Terminate test-stem if it takes more than 9.5 minutes to run.
6866 (Travis terminates the job after 10 minutes of no output.)
6867 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
6869 o Minor bugfixes (bootstrap reporting):
6870 - During bootstrap reporting, correctly distinguish pluggable
6871 transports from plain proxies. Fixes bug 28925; bugfix
6874 o Minor bugfixes (C correctness):
6875 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
6876 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
6879 o Minor bugfixes (circuitpadding testing):
6880 - Minor tweaks to avoid rare test failures related to timers and
6881 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
6883 o Minor bugfixes (directory authorities):
6884 - Actually include the bandwidth-file-digest line in directory
6885 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
6887 o Minor bugfixes (logging):
6888 - On Windows, when errors cause us to reload a consensus from disk,
6889 tell the user that we are retrying at log level "notice".
6890 Previously we only logged this information at "info", which was
6891 confusing because the errors themselves were logged at "warning".
6892 Improves previous fix for 28614. Fixes bug 30004; bugfix
6895 o Minor bugfixes (pluggable transports):
6896 - Restore old behavior when it comes to discovering the path of a
6897 given Pluggable Transport executable file. A change in
6898 0.4.0.1-alpha had broken this behavior on paths containing a
6899 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
6901 o Minor bugfixes (testing):
6902 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
6903 recent test-network.sh to use new chutney features in CI. Fixes
6904 bug 29703; bugfix on 0.2.9.1-alpha.
6905 - Fix a test failure on Windows caused by an unexpected "BUG"
6906 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
6909 o Minor bugfixes (TLS protocol):
6910 - When classifying a client's selection of TLS ciphers, if the
6911 client ciphers are not yet available, do not cache the result.
6912 Previously, we had cached the unavailability of the cipher list
6913 and never looked again, which in turn led us to assume that the
6914 client only supported the ancient V1 link protocol. This, in turn,
6915 was causing Stem integration tests to stall in some cases. Fixes
6916 bug 30021; bugfix on 0.2.4.8-alpha.
6918 o Code simplification and refactoring:
6919 - Introduce a connection_dir_buf_add() helper function that detects
6920 whether compression is in use, and adds a string accordingly.
6921 Resolves issue 28816.
6922 - Refactor handle_get_next_bandwidth() to use
6923 connection_dir_buf_add(). Implements ticket 29897.
6926 - Clarify that Tor performs stream isolation among *Port listeners
6927 by default. Resolves issue 29121.
6930 Changes in version 0.4.0.3-alpha - 2019-03-22
6931 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
6932 bugs from earlier versions.
6934 o Minor features (address selection):
6935 - Treat the subnet 100.64.0.0/10 as public for some purposes;
6936 private for others. This subnet is the RFC 6598 (Carrier Grade
6937 NAT) IP range, and is deployed by many ISPs as an alternative to
6938 RFC 1918 that does not break existing internal networks. Tor now
6939 blocks SOCKS and control ports on these addresses and warns users
6940 if client ports or ExtORPorts are listening on a RFC 6598 address.
6941 Closes ticket 28525. Patch by Neel Chauhan.
6943 o Minor features (geoip):
6944 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
6945 Country database. Closes ticket 29666.
6947 o Minor bugfixes (circuitpadding):
6948 - Inspect the circuit-level cell queue before sending padding, to
6949 avoid sending padding when too much data is queued. Fixes bug
6950 29204; bugfix on 0.4.0.1-alpha.
6952 o Minor bugfixes (logging):
6953 - Correct a misleading error message when IPv4Only or IPv6Only is
6954 used but the resolved address can not be interpreted as an address
6955 of the specified IP version. Fixes bug 13221; bugfix on
6956 0.2.3.9-alpha. Patch from Kris Katterjohn.
6957 - Log the correct port number for listening sockets when "auto" is
6958 used to let Tor pick the port number. Previously, port 0 was
6959 logged instead of the actual port number. Fixes bug 29144; bugfix
6960 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6961 - Stop logging a BUG() warning when Tor is waiting for exit
6962 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
6964 o Minor bugfixes (memory management):
6965 - Refactor the shared random state's memory management so that it
6966 actually takes ownership of the shared random value pointers.
6967 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
6969 o Minor bugfixes (memory management, testing):
6970 - Stop leaking parts of the shared random state in the shared-random
6971 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
6973 o Minor bugfixes (pluggable transports):
6974 - Fix an assertion failure crash bug when a pluggable transport is
6975 terminated during the bootstrap phase. Fixes bug 29562; bugfix
6978 o Minor bugfixes (Rust, protover):
6979 - Add a missing "Padding" value to the Rust implementation of
6980 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
6982 o Minor bugfixes (single onion services):
6983 - Allow connections to single onion services to remain idle without
6984 being disconnected. Previously, relays acting as rendezvous points
6985 for single onion services were mistakenly closing idle rendezvous
6986 circuits after 60 seconds, thinking that they were unused
6987 directory-fetching circuits that had served their purpose. Fixes
6988 bug 29665; bugfix on 0.2.1.26.
6990 o Minor bugfixes (stats):
6991 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
6992 relay and bridge extra-info documents. Fixes bug 29017; bugfix
6995 o Minor bugfixes (testing):
6996 - Downgrade some LOG_ERR messages in the address/* tests to
6997 warnings. The LOG_ERR messages were occurring when we had no
6998 configured network. We were failing the unit tests, because we
6999 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
7000 29530; bugfix on 0.3.5.8.
7001 - Fix our gcov wrapper script to look for object files at the
7002 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
7003 - Decrease the false positive rate of stochastic probability
7004 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
7006 o Minor bugfixes (Windows, CI):
7007 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
7008 Windows Server 2012 R2 job. The remaining 2 jobs still provide
7009 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
7010 fast_finish, so failed jobs terminate the build immediately. Fixes
7011 bug 29601; bugfix on 0.3.5.4-alpha.
7014 Changes in version 0.3.5.8 - 2019-02-21
7015 Tor 0.3.5.8 backports several fixes from later releases, including fixes
7016 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
7019 It also includes a fix for a medium-severity security bug affecting Tor
7020 0.3.2.1-alpha and later. All Tor instances running an affected release
7021 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7023 o Major bugfixes (cell scheduler, KIST, security):
7024 - Make KIST consider the outbuf length when computing what it can
7025 put in the outbuf. Previously, KIST acted as though the outbuf
7026 were empty, which could lead to the outbuf becoming too full. It
7027 is possible that an attacker could exploit this bug to cause a Tor
7028 client or relay to run out of memory and crash. Fixes bug 29168;
7029 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7030 TROVE-2019-001 and CVE-2019-8955.
7032 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
7033 - Gracefully handle empty username/password fields in SOCKS5
7034 username/password auth message and allow SOCKS5 handshake to
7035 continue. Previously, we had rejected these handshakes, breaking
7036 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7038 o Minor features (compilation, backport from 0.4.0.2-alpha):
7039 - Compile correctly when OpenSSL is built with engine support
7040 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7041 Patches from "Mangix".
7043 o Minor features (geoip):
7044 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7045 Country database. Closes ticket 29478.
7047 o Minor features (testing, backport from 0.4.0.2-alpha):
7048 - Treat all unexpected ERR and BUG messages as test failures. Closes
7051 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
7052 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7053 connection waiting for a descriptor that we actually have in the
7054 cache. It turns out that this can actually happen, though it is
7055 rare. Now, tor will recover and retry the descriptor. Fixes bug
7056 28669; bugfix on 0.3.2.4-alpha.
7058 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
7059 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7060 IPv6 socket was bound using an address family of AF_INET instead
7061 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7064 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7065 - Update Cargo.lock file to match the version made by the latest
7066 version of Rust, so that "make distcheck" will pass again. Fixes
7067 bug 29244; bugfix on 0.3.3.4-alpha.
7069 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
7070 - Select guards even if the consensus has expired, as long as the
7071 consensus is still reasonably live. Fixes bug 24661; bugfix
7074 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
7075 - Compile correctly on OpenBSD; previously, we were missing some
7076 headers required in order to detect it properly. Fixes bug 28938;
7077 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7079 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
7080 - Describe the contents of the v3 onion service client authorization
7081 files correctly: They hold public keys, not private keys. Fixes
7082 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7084 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
7085 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7086 link protocol versions when logging incoming/outgoing connection
7087 counts. Tor no longer skips version 5, and we won't have to
7088 remember to update this function when new link protocol version is
7089 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7091 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
7092 - Log more information at "warning" level when unable to read a
7093 private key; log more information at "info" level when unable to
7094 read a public key. We had warnings here before, but they were lost
7095 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7097 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
7098 - The amount of total available physical memory is now determined
7099 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7100 when it is defined and a 64-bit variant is not available. Fixes
7101 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7103 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7104 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7105 than one private key for a hidden service. Fixes bug 29040; bugfix
7107 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7108 "debug" level. Tor used to log it as a warning, which caused very
7109 long log lines to appear for some users. Fixes bug 29135; bugfix
7111 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7112 as a warning. Instead, log it as a protocol warning, because there
7113 is nothing that relay operators can do to fix it. Fixes bug 29029;
7114 bugfix on 0.2.5.7-rc.
7116 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
7117 - Mark outdated dirservers when Tor only has a reasonably live
7118 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7120 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
7121 - Detect and suppress "bug" warnings from the util/time test on
7122 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7123 - Do not log an error-level message if we fail to find an IPv6
7124 network interface from the unit tests. Fixes bug 29160; bugfix
7127 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
7128 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7129 Some users took this phrasing to mean that the mentioned guard was
7130 under their control or responsibility, which it is not. Fixes bug
7131 28895; bugfix on Tor 0.3.0.1-alpha.
7134 Changes in version 0.3.4.11 - 2019-02-21
7135 Tor 0.3.4.11 is the third stable release in its series. It includes
7136 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
7137 later. All Tor instances running an affected release should upgrade to
7138 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7140 o Major bugfixes (cell scheduler, KIST, security):
7141 - Make KIST consider the outbuf length when computing what it can
7142 put in the outbuf. Previously, KIST acted as though the outbuf
7143 were empty, which could lead to the outbuf becoming too full. It
7144 is possible that an attacker could exploit this bug to cause a Tor
7145 client or relay to run out of memory and crash. Fixes bug 29168;
7146 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7147 TROVE-2019-001 and CVE-2019-8955.
7149 o Minor features (geoip):
7150 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7151 Country database. Closes ticket 29478.
7153 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7154 - Update Cargo.lock file to match the version made by the latest
7155 version of Rust, so that "make distcheck" will pass again. Fixes
7156 bug 29244; bugfix on 0.3.3.4-alpha.
7158 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7159 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7160 as a warning. Instead, log it as a protocol warning, because there
7161 is nothing that relay operators can do to fix it. Fixes bug 29029;
7162 bugfix on 0.2.5.7-rc.
7165 Changes in version 0.3.3.12 - 2019-02-21
7166 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
7167 0.3.2.1-alpha and later. All Tor instances running an affected release
7168 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7170 This release marks the end of support for the Tor 0.3.3.x series. We
7171 recommend that users switch to either the Tor 0.3.4 series (supported
7172 until at least 10 June 2019), or the Tor 0.3.5 series, which will
7173 receive long-term support until at least 1 Feb 2022.
7175 o Major bugfixes (cell scheduler, KIST, security):
7176 - Make KIST consider the outbuf length when computing what it can
7177 put in the outbuf. Previously, KIST acted as though the outbuf
7178 were empty, which could lead to the outbuf becoming too full. It
7179 is possible that an attacker could exploit this bug to cause a Tor
7180 client or relay to run out of memory and crash. Fixes bug 29168;
7181 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7182 TROVE-2019-001 and CVE-2019-8955.
7184 o Minor features (geoip):
7185 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7186 Country database. Closes ticket 29478.
7188 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
7189 - Update Cargo.lock file to match the version made by the latest
7190 version of Rust, so that "make distcheck" will pass again. Fixes
7191 bug 29244; bugfix on 0.3.3.4-alpha.
7193 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
7194 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7195 as a warning. Instead, log it as a protocol warning, because there
7196 is nothing that relay operators can do to fix it. Fixes bug 29029;
7197 bugfix on 0.2.5.7-rc.
7200 Changes in version 0.4.0.2-alpha - 2019-02-21
7201 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
7202 bugs from earlier versions, including several that had broken
7203 backward compatibility.
7205 It also includes a fix for a medium-severity security bug affecting Tor
7206 0.3.2.1-alpha and later. All Tor instances running an affected release
7207 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
7209 o Major bugfixes (cell scheduler, KIST, security):
7210 - Make KIST consider the outbuf length when computing what it can
7211 put in the outbuf. Previously, KIST acted as though the outbuf
7212 were empty, which could lead to the outbuf becoming too full. It
7213 is possible that an attacker could exploit this bug to cause a Tor
7214 client or relay to run out of memory and crash. Fixes bug 29168;
7215 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
7216 TROVE-2019-001 and CVE-2019-8955.
7218 o Major bugfixes (networking):
7219 - Gracefully handle empty username/password fields in SOCKS5
7220 username/password auth messsage and allow SOCKS5 handshake to
7221 continue. Previously, we had rejected these handshakes, breaking
7222 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
7224 o Major bugfixes (windows, startup):
7225 - When reading a consensus file from disk, detect whether it was
7226 written in text mode, and re-read it in text mode if so. Always
7227 write consensus files in binary mode so that we can map them into
7228 memory later. Previously, we had written in text mode, which
7229 confused us when we tried to map the file on windows. Fixes bug
7230 28614; bugfix on 0.4.0.1-alpha.
7232 o Minor features (compilation):
7233 - Compile correctly when OpenSSL is built with engine support
7234 disabled, or with deprecated APIs disabled. Closes ticket 29026.
7235 Patches from "Mangix".
7237 o Minor features (developer tooling):
7238 - Check that bugfix versions in changes files look like Tor versions
7239 from the versions spec. Warn when bugfixes claim to be on a future
7240 release. Closes ticket 27761.
7241 - Provide a git pre-commit hook that disallows committing if we have
7242 any failures in our code and changelog formatting checks. It is
7243 now available in scripts/maint/pre-commit.git-hook. Implements
7246 o Minor features (directory authority):
7247 - When a directory authority is using a bandwidth file to obtain
7248 bandwidth values, include the digest of that file in the vote.
7249 Closes ticket 26698.
7251 o Minor features (geoip):
7252 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
7253 Country database. Closes ticket 29478.
7255 o Minor features (testing):
7256 - Treat all unexpected ERR and BUG messages as test failures. Closes
7259 o Minor bugfixes (build, compatibility, rust):
7260 - Update Cargo.lock file to match the version made by the latest
7261 version of Rust, so that "make distcheck" will pass again. Fixes
7262 bug 29244; bugfix on 0.3.3.4-alpha.
7264 o Minor bugfixes (compilation):
7265 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
7266 29169; bugfix on 0.4.0.1-alpha.
7267 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
7268 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
7270 o Minor bugfixes (documentation):
7271 - Describe the contents of the v3 onion service client authorization
7272 files correctly: They hold public keys, not private keys. Fixes
7273 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
7275 o Minor bugfixes (linux seccomp sandbox):
7276 - Fix startup crash when experimental sandbox support is enabled.
7277 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
7279 o Minor bugfixes (logging):
7280 - Avoid logging that we are relaxing a circuit timeout when that
7281 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
7282 - Log more information at "warning" level when unable to read a
7283 private key; log more information at "info" level when unable to
7284 read a public key. We had warnings here before, but they were lost
7285 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
7287 o Minor bugfixes (misc):
7288 - The amount of total available physical memory is now determined
7289 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
7290 when it is defined and a 64-bit variant is not available. Fixes
7291 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
7293 o Minor bugfixes (onion services):
7294 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
7295 than one private key for a hidden service. Fixes bug 29040; bugfix
7297 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
7298 "debug" level. Tor used to log it as a warning, which caused very
7299 long log lines to appear for some users. Fixes bug 29135; bugfix
7301 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
7302 as a warning. Instead, log it as a protocol warning, because there
7303 is nothing that relay operators can do to fix it. Fixes bug 29029;
7304 bugfix on 0.2.5.7-rc.
7306 o Minor bugfixes (scheduler):
7307 - When re-adding channels to the pending list, check the correct
7308 channel's sched_heap_idx. This issue has had no effect in mainline
7309 Tor, but could have led to bugs down the road in improved versions
7310 of our circuit scheduling code. Fixes bug 29508; bugfix
7313 o Minor bugfixes (tests):
7314 - Fix intermittent failures on an adaptive padding test. Fixes one
7315 case of bug 29122; bugfix on 0.4.0.1-alpha.
7316 - Disable an unstable circuit-padding test that was failing
7317 intermittently because of an ill-defined small histogram. Such
7318 histograms will be allowed again after 29298 is implemented. Fixes
7319 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
7320 - Detect and suppress "bug" warnings from the util/time test on
7321 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
7322 - Do not log an error-level message if we fail to find an IPv6
7323 network interface from the unit tests. Fixes bug 29160; bugfix
7327 - In the manpage entry describing MapAddress torrc setting, use
7328 example IP addresses from ranges specified for use in documentation
7329 by RFC 5737. Resolves issue 28623.
7332 - Remove the old check-tor script. Resolves issue 29072.
7335 Changes in version 0.4.0.1-alpha - 2019-01-18
7336 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
7337 introduces improved features for power and bandwidth conservation,
7338 more accurate reporting of bootstrap progress for user interfaces, and
7339 an experimental backend for an exciting new adaptive padding feature.
7340 There is also the usual assortment of bugfixes and minor features, all
7343 o Major features (battery management, client, dormant mode):
7344 - When Tor is running as a client, and it is unused for a long time,
7345 it can now enter a "dormant" state. When Tor is dormant, it avoids
7346 network and CPU activity until it is reawoken either by a user
7347 request or by a controller command. For more information, see the
7348 configuration options starting with "Dormant". Implements tickets
7350 - The client's memory of whether it is "dormant", and how long it
7351 has spent idle, persists across invocations. Implements
7353 - There is a DormantOnFirstStartup option that integrators can use
7354 if they expect that in many cases, Tor will be installed but
7357 o Major features (bootstrap reporting):
7358 - When reporting bootstrap progress, report the first connection
7359 uniformly, regardless of whether it's a connection for building
7360 application circuits. This allows finer-grained reporting of early
7361 progress than previously possible, with the improvements of ticket
7362 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
7363 - When reporting bootstrap progress, treat connecting to a proxy or
7364 pluggable transport as separate from having successfully used that
7365 proxy or pluggable transport to connect to a relay. Closes tickets
7368 o Major features (circuit padding):
7369 - Implement preliminary support for the circuit padding portion of
7370 Proposal 254. The implementation supports Adaptive Padding (aka
7371 WTF-PAD) state machines for use between experimental clients and
7372 relays. Support is also provided for APE-style state machines that
7373 use probability distributions instead of histograms to specify
7374 inter-packet delay. At the moment, Tor does not provide any
7375 padding state machines that are used in normal operation: for now,
7376 this feature exists solely for experimentation. Closes
7379 o Major features (refactoring):
7380 - Tor now uses an explicit list of its own subsystems when
7381 initializing and shutting down. Previously, these systems were
7382 managed implicitly in various places throughout the codebase.
7383 (There may still be some subsystems using the old system.) Closes
7386 o Minor features (bootstrap reporting):
7387 - When reporting bootstrap progress, stop distinguishing between
7388 situations where only internal paths are available and situations
7389 where external paths are available. Previously, Tor would often
7390 erroneously report that it had only internal paths. Closes
7393 o Minor features (continuous integration):
7394 - Log Python version during each Travis CI job. Resolves
7397 o Minor features (controller):
7398 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
7399 Implements ticket 28843.
7401 o Minor features (developer tooling):
7402 - Provide a git hook script to prevent "fixup!" and "squash!"
7403 commits from ending up in the master branch, as scripts/main/pre-
7404 push.git-hook. Closes ticket 27993.
7406 o Minor features (directory authority):
7407 - Directory authorities support a new consensus algorithm, under
7408 which the family lines in microdescriptors are encoded in a
7409 canonical form. This change makes family lines more compressible
7410 in transit, and on the client. Closes ticket 28266; implements
7413 o Minor features (directory authority, relay):
7414 - Authorities now vote on a "StaleDesc" flag to indicate that a
7415 relay's descriptor is so old that the relay should upload again
7416 soon. Relays treat this flag as a signal to upload a new
7417 descriptor. This flag will eventually let us remove the
7418 'published' date from routerstatus entries, and make our consensus
7419 diffs much smaller. Closes ticket 26770; implements proposal 293.
7421 o Minor features (fallback directory mirrors):
7422 - Update the fallback whitelist based on operator opt-ins and opt-
7423 outs. Closes ticket 24805, patch by Phoul.
7425 o Minor features (FreeBSD):
7426 - On FreeBSD-based systems, warn relay operators if the
7427 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
7428 Closes ticket 28518.
7430 o Minor features (HTTP standards compliance):
7431 - Stop sending the header "Content-type: application/octet-stream"
7432 along with transparently compressed documents: this confused
7433 browsers. Closes ticket 28100.
7435 o Minor features (IPv6):
7436 - We add an option ClientAutoIPv6ORPort, to make clients randomly
7437 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
7438 every time a node is loaded from a new consensus or bridge config.
7439 We expect that this option will enable clients to bootstrap more
7440 quickly without having to determine whether they support IPv4,
7441 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
7442 - When using addrs_in_same_network_family(), avoid choosing circuit
7443 paths that pass through the same IPv6 subnet more than once.
7444 Previously, we only checked IPv4 subnets. Closes ticket 24393.
7445 Patch by Neel Chauhan.
7447 o Minor features (log messages):
7448 - Improve log message in v3 onion services that could print out
7449 negative revision counters. Closes ticket 27707. Patch
7452 o Minor features (memory usage):
7453 - Save memory by storing microdescriptor family lists with a more
7454 compact representation. Closes ticket 27359.
7455 - Tor clients now use mmap() to read consensus files from disk, so
7456 that they no longer need keep the full text of a consensus in
7457 memory when parsing it or applying a diff. Closes ticket 27244.
7459 o Minor features (parsing):
7460 - Directory authorities now validate that router descriptors and
7461 ExtraInfo documents are in a valid subset of UTF-8, and reject
7462 them if they are not. Closes ticket 27367.
7464 o Minor features (performance):
7465 - Cache the results of summarize_protocol_flags(), so that we don't
7466 have to parse the same protocol-versions string over and over.
7467 This should save us a huge number of malloc calls on startup, and
7468 may reduce memory fragmentation with some allocators. Closes
7470 - Remove a needless memset() call from get_token_arguments, thereby
7471 speeding up the tokenization of directory objects by about 20%.
7472 Closes ticket 28852.
7473 - Replace parse_short_policy() with a faster implementation, to
7474 improve microdescriptor parsing time. Closes ticket 28853.
7475 - Speed up directory parsing a little by avoiding use of the non-
7476 inlined strcmp_len() function. Closes ticket 28856.
7477 - Speed up microdescriptor parsing by about 30%, to help improve
7478 startup time. Closes ticket 28839.
7480 o Minor features (pluggable transports):
7481 - Add support for emitting STATUS updates to Tor's control port from
7482 a pluggable transport process. Closes ticket 28846.
7483 - Add support for logging to Tor's logging subsystem from a
7484 pluggable transport process. Closes ticket 28180.
7486 o Minor features (process management):
7487 - Add a new process API for handling child processes. This new API
7488 allows Tor to have bi-directional communication with child
7489 processes on both Unix and Windows. Closes ticket 28179.
7490 - Use the subsystem manager to initialize and shut down the process
7491 module. Closes ticket 28847.
7493 o Minor features (relay):
7494 - When listing relay families, list them in canonical form including
7495 the relay's own identity, and try to give a more useful set of
7496 warnings. Part of ticket 28266 and proposal 298.
7498 o Minor features (required protocols):
7499 - Before exiting because of a missing required protocol, Tor will
7500 now check the publication time of the consensus, and not exit
7501 unless the consensus is newer than the Tor program's own release
7502 date. Previously, Tor would not check the consensus publication
7503 time, and so might exit because of a missing protocol that might
7504 no longer be required in a current consensus. Implements proposal
7505 297; closes ticket 27735.
7507 o Minor features (testing):
7508 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
7509 networks. Closes ticket 28840. Patch by Rob Jansen.
7511 o Minor bugfixes (client, clock skew):
7512 - Bootstrap successfully even when Tor's clock is behind the clocks
7513 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
7514 - Select guards even if the consensus has expired, as long as the
7515 consensus is still reasonably live. Fixes bug 24661; bugfix
7518 o Minor bugfixes (compilation):
7519 - Compile correctly on OpenBSD; previously, we were missing some
7520 headers required in order to detect it properly. Fixes bug 28938;
7521 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7523 o Minor bugfixes (directory clients):
7524 - Mark outdated dirservers when Tor only has a reasonably live
7525 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
7527 o Minor bugfixes (directory mirrors):
7528 - Even when a directory mirror's clock is behind the clocks on the
7529 authorities, we now allow the mirror to serve "future"
7530 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
7532 o Minor bugfixes (DNS):
7533 - Gracefully handle an empty or absent resolve.conf file by falling
7534 back to using "localhost" as a DNS server (and hoping it works).
7535 Previously, we would just stop running as an exit. Fixes bug
7536 21900; bugfix on 0.2.1.10-alpha.
7538 o Minor bugfixes (guards):
7539 - In count_acceptable_nodes(), the minimum number is now one bridge
7540 or guard node, and two non-guard nodes for a circuit. Previously,
7541 we had added up the sum of all nodes with a descriptor, but that
7542 could cause us to build failing circuits when we had either too
7543 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
7544 0.2.3.1-alpha. Patch by Neel Chauhan.
7546 o Minor bugfixes (IPv6):
7547 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
7548 IPv6 socket was bound using an address family of AF_INET instead
7549 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
7552 o Minor bugfixes (logging):
7553 - Rework rep_hist_log_link_protocol_counts() to iterate through all
7554 link protocol versions when logging incoming/outgoing connection
7555 counts. Tor no longer skips version 5, and we won't have to
7556 remember to update this function when new link protocol version is
7557 developed. Fixes bug 28920; bugfix on 0.2.6.10.
7559 o Minor bugfixes (networking):
7560 - Introduce additional checks into tor_addr_parse() to reject
7561 certain incorrect inputs that previously were not detected. Fixes
7562 bug 23082; bugfix on 0.2.0.10-alpha.
7564 o Minor bugfixes (onion service v3, client):
7565 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
7566 connection waiting for a descriptor that we actually have in the
7567 cache. It turns out that this can actually happen, though it is
7568 rare. Now, tor will recover and retry the descriptor. Fixes bug
7569 28669; bugfix on 0.3.2.4-alpha.
7571 o Minor bugfixes (periodic events):
7572 - Refrain from calling routerlist_remove_old_routers() from
7573 check_descriptor_callback(). Instead, create a new hourly periodic
7574 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
7576 o Minor bugfixes (pluggable transports):
7577 - Make sure that data is continously read from standard output and
7578 standard error pipes of a pluggable transport child-process, to
7579 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
7580 bugfix on 0.2.3.6-alpha.
7582 o Minor bugfixes (unit tests):
7583 - Instead of relying on hs_free_all() to clean up all onion service
7584 objects in test_build_descriptors(), we now deallocate them one by
7585 one. This lets Coverity know that we are not leaking memory there
7586 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
7588 o Minor bugfixes (usability):
7589 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
7590 Some users took this phrasing to mean that the mentioned guard was
7591 under their control or responsibility, which it is not. Fixes bug
7592 28895; bugfix on Tor 0.3.0.1-alpha.
7594 o Code simplification and refactoring:
7595 - Reimplement NETINFO cell parsing and generation to rely on
7596 trunnel-generated wire format handling code. Closes ticket 27325.
7597 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
7599 - Rework SOCKS wire format handling to rely on trunnel-generated
7600 parsing/generation code. Resolves ticket 27620.
7601 - Split out bootstrap progress reporting from control.c into a
7602 separate file. Part of ticket 27402.
7603 - The .may_include files that we use to describe our directory-by-
7604 directory dependency structure now describe a noncircular
7605 dependency graph over the directories that they cover. Our
7606 checkIncludes.py tool now enforces this noncircularity. Closes
7610 - Mention that you cannot add a new onion service if Tor is already
7611 running with Sandbox enabled. Closes ticket 28560.
7612 - Improve ControlPort documentation. Mention that it accepts
7613 address:port pairs, and can be used multiple times. Closes
7615 - Document the exact output of "tor --version". Closes ticket 28889.
7618 - Stop responding to the 'GETINFO status/version/num-concurring' and
7619 'GETINFO status/version/num-versioning' control port commands, as
7620 those were deprecated back in 0.2.0.30. Also stop listing them in
7621 output of 'GETINFO info/names'. Resolves ticket 28757.
7622 - The scripts used to generate and maintain the list of fallback
7623 directories have been extracted into a new "fallback-scripts"
7624 repository. Closes ticket 27914.
7627 - Run shellcheck for scripts in the in scripts/ directory. Closes
7629 - Add unit tests for tokenize_string() and get_next_token()
7630 functions. Resolves ticket 27625.
7632 o Code simplification and refactoring (onion service v3):
7633 - Consolidate the authorized client descriptor cookie computation
7634 code from client and service into one function. Closes
7637 o Code simplification and refactoring (shell scripts):
7638 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
7640 - Fix issues that shellcheck found in chutney-git-bisect.sh.
7641 Resolves ticket 28006.
7642 - Fix issues that shellcheck found in updateRustDependencies.sh.
7643 Resolves ticket 28012.
7644 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
7645 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
7646 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
7647 - Fix shellcheck warnings in scripts/test/coverage. Resolves
7651 Changes in version 0.3.3.11 - 2019-01-07
7652 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
7653 numerous fixes, including an important fix for anyone using OpenSSL
7654 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
7655 to this version, or to a later series.
7657 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
7658 We anticipate that this will be the last release of Tor 0.3.3, unless
7659 some major bug is before then. Some time between now and then, users
7660 should switch to either the Tor 0.3.4 series (supported until at least
7661 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
7662 support until at least 1 Feb 2022.
7664 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
7665 - Fix our usage of named groups when running as a TLS 1.3 client in
7666 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7667 running as a relay, which caused clients to fail to negotiate TLS
7668 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7671 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
7672 - Fix a use-after-free error that could be caused by passing Tor an
7673 impossible set of options that would fail during options_act().
7674 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7676 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
7677 - Only run one online rust build in Travis, to reduce network
7678 errors. Skip offline rust builds on Travis for Linux gcc, because
7679 they're redundant. Implements ticket 27252.
7680 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7681 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7682 Linux with default settings, because all the non-default builds
7683 use gcc on Linux. Implements ticket 27252.
7685 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
7686 - Use the Travis Homebrew addon to install packages on macOS during
7687 Travis CI. The package list is the same, but the Homebrew addon
7688 does not do a `brew update` by default. Implements ticket 27738.
7690 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
7691 - Replace the 150 fallbacks originally introduced in Tor
7692 0.3.3.1-alpha in January 2018 (of which ~115 were still
7693 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
7694 removed) generated in December 2018. Closes ticket 24803.
7696 o Minor features (geoip):
7697 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
7698 Country database. Closes ticket 29012.
7700 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
7701 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7702 key export function from handling long labels. When this bug is
7703 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7704 version of OpenSSL without this bug when it becomes available.
7705 Closes ticket 28973.
7707 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
7708 - Update relay descriptor on bandwidth changes only when the uptime
7709 is smaller than 24h, in order to reduce the efficiency of guard
7710 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7712 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
7713 - Avoid undefined behavior in an end-of-string check when parsing
7714 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7717 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
7718 - Rewrite our assertion macros so that they no longer suppress the
7719 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7721 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
7722 - Initialize a variable unconditionally in aes_new_cipher(), since
7723 some compilers cannot tell that we always initialize it before
7724 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7726 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
7727 - Log additional info when we get a relay that shares an ed25519 ID
7728 with a different relay, instead making a BUG() warning. Fixes bug
7729 27800; bugfix on 0.3.2.1-alpha.
7731 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
7732 - When a user requests a group-readable DataDirectory, give it to
7733 them. Previously, when the DataDirectory and the CacheDirectory
7734 were the same, the default setting (0) for
7735 CacheDirectoryGroupReadable would override the setting for
7736 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7739 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
7740 - When the onion service directory can't be created or has the wrong
7741 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7744 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
7745 - Close all SOCKS request (for the same .onion) if the newly fetched
7746 descriptor is unusable. Before that, we would close only the first
7747 one leaving the other hanging and let to time out by themselves.
7748 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7750 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7751 - Don't warn so loudly when Tor is unable to decode an onion
7752 descriptor. This can now happen as a normal use case if a client
7753 gets a descriptor with client authorization but the client is not
7754 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7756 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
7757 - When deleting an ephemeral onion service (DEL_ONION), do not close
7758 any rendezvous circuits in order to let the existing client
7759 connections finish by themselves or closed by the application. The
7760 HS v2 is doing that already so now we have the same behavior for
7761 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7763 o Minor bugfixes (HTTP tunnel):
7764 - Fix a bug warning when closing an HTTP tunnel connection due to
7765 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
7768 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
7769 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7770 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7772 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
7773 - Ensure circuitmux queues are empty before scheduling or sending
7774 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7776 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
7777 - Reject protocol names containing bytes other than alphanumeric
7778 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7781 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
7782 - Compute protover votes correctly in the rust version of the
7783 protover code. Previously, the protover rewrite in 24031 allowed
7784 repeated votes from the same voter for the same protocol version
7785 to be counted multiple times in protover_compute_vote(). Fixes bug
7786 27649; bugfix on 0.3.3.5-rc.
7787 - Reject protover names that contain invalid characters. Fixes bug
7788 27687; bugfix on 0.3.3.1-alpha.
7790 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
7791 - protover_all_supported() would attempt to allocate up to 16GB on
7792 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7793 bugfix on 0.3.3.5-rc.
7795 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
7796 - Fix a potential null dereference in protover_all_supported(). Add
7797 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7798 - Return a string that can be safely freed by C code, not one
7799 created by the rust allocator, in protover_all_supported(). Fixes
7800 bug 27740; bugfix on 0.3.3.1-alpha.
7801 - Fix an API mismatch in the rust implementation of
7802 protover_compute_vote(). This bug could have caused crashes on any
7803 directory authorities running Tor with Rust (which we do not yet
7804 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7806 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
7807 - If a unit test running in a subprocess exits abnormally or with a
7808 nonzero status code, treat the test as having failed, even if the
7809 test reported success. Without this fix, memory leaks don't cause
7810 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7811 bugfix on 0.2.2.4-alpha.
7813 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
7814 - Treat backtrace test failures as expected on BSD-derived systems
7815 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7816 (FreeBSD failures have been treated as expected since 18204 in
7817 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7819 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
7820 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7821 bugfix on 0.3.0.1-alpha.
7824 Changes in version 0.3.4.10 - 2019-01-07
7825 Tor 0.3.4.9 is the second stable release in its series; it backports
7826 numerous fixes, including an important fix for relays, and for anyone
7827 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
7830 As a reminder, the Tor 0.3.4 series will be supported until 10 June
7831 2019. Some time between now and then, users should switch to the Tor
7832 0.3.5 series, which will receive long-term support until at least 1
7835 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
7836 - Fix our usage of named groups when running as a TLS 1.3 client in
7837 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7838 running as a relay, which caused clients to fail to negotiate TLS
7839 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7842 o Major bugfixes (relay, directory, backport from 0.3.5.7):
7843 - Always reactivate linked connections in the main loop so long as
7844 any linked connection has been active. Previously, connections
7845 serving directory information wouldn't get reactivated after the
7846 first chunk of data was sent (usually 32KB), which would prevent
7847 clients from bootstrapping. Fixes bug 28912; bugfix on
7848 0.3.4.1-alpha. Patch by "cypherpunks3".
7850 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
7851 - Always show the configure and test logs, and upload them as build
7852 artifacts, when building for Windows using Appveyor CI.
7855 o Minor features (controller, backport from 0.3.5.1-alpha):
7856 - For purposes of CIRC_BW-based dropped cell detection, track half-
7857 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
7858 bias check cells to arrive without counting it as dropped until
7859 either the END arrives, or the windows are empty. Closes
7862 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
7863 - Replace the 150 fallbacks originally introduced in Tor
7864 0.3.3.1-alpha in January 2018 (of which ~115 were still
7865 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
7866 removed) generated in December 2018. Closes ticket 24803.
7868 o Minor features (geoip):
7869 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
7870 Country database. Closes ticket 28395.
7872 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
7873 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7874 key export function from handling long labels. When this bug is
7875 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7876 version of OpenSSL without this bug when it becomes available.
7877 Closes ticket 28973.
7879 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
7880 - Initialize a variable unconditionally in aes_new_cipher(), since
7881 some compilers cannot tell that we always initialize it before
7882 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7884 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
7885 - Avoid a logging a BUG() stacktrace when closing connection held
7886 open because the write side is rate limited but not the read side.
7887 Now, the connection read side is simply shut down until Tor is
7888 able to flush the connection and close it. Fixes bug 27750; bugfix
7891 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
7892 - Manually configure the zstd compiler options, when building using
7893 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
7894 not come with a pkg-config file. Fixes bug 28454; bugfix
7896 - Stop using an external OpenSSL install, and stop installing MSYS2
7897 packages, when building using mingw on Appveyor Windows CI. Fixes
7898 bug 28399; bugfix on 0.3.4.1-alpha.
7900 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
7901 - Explicitly specify the path to the OpenSSL library and do not
7902 download OpenSSL from Pacman, but instead use the library that is
7903 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
7905 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
7906 - When a user requests a group-readable DataDirectory, give it to
7907 them. Previously, when the DataDirectory and the CacheDirectory
7908 were the same, the default setting (0) for
7909 CacheDirectoryGroupReadable would override the setting for
7910 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7913 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
7914 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7915 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7917 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7918 - Don't warn so loudly when Tor is unable to decode an onion
7919 descriptor. This can now happen as a normal use case if a client
7920 gets a descriptor with client authorization but the client is not
7921 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7923 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
7924 - When deleting an ephemeral onion service (DEL_ONION), do not close
7925 any rendezvous circuits in order to let the existing client
7926 connections finish by themselves or closed by the application. The
7927 HS v2 is doing that already so now we have the same behavior for
7928 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7930 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
7931 - Update relay descriptor on bandwidth changes only when the uptime
7932 is smaller than 24h, in order to reduce the efficiency of guard
7933 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7935 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
7936 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7937 bugfix on 0.3.0.1-alpha.
7940 Changes in version 0.3.5.7 - 2019-01-07
7941 Tor 0.3.5.7 is the first stable release in its series; it includes
7942 compilation and portability fixes, and a fix for a severe problem
7943 affecting directory caches.
7945 The Tor 0.3.5 series includes several new features and performance
7946 improvements, including client authorization for v3 onion services,
7947 cleanups to bootstrap reporting, support for improved bandwidth-
7948 measurement tools, experimental support for NSS in place of OpenSSL,
7949 and much more. It also begins a full reorganization of Tor's code
7950 layout, for improved modularity and maintainability in the future.
7951 Finally, there is the usual set of performance improvements and
7952 bugfixes that we try to do in every release series.
7954 There are a couple of changes in the 0.3.5 that may affect
7955 compatibility. First, the default version for newly created onion
7956 services is now v3. Use the HiddenServiceVersion option if you want to
7957 override this. Second, some log messages related to bootstrapping have
7958 changed; if you use stem, you may need to update to the latest version
7959 so it will recognize them.
7961 We have designated 0.3.5 as a "long-term support" (LTS) series: we
7962 will continue to patch major bugs in typical configurations of 0.3.5
7963 until at least 1 Feb 2022. (We do not plan to provide long-term
7964 support for embedding, Rust support, NSS support, running a directory
7965 authority, or unsupported platforms. For these, you will need to stick
7966 with the latest stable release.)
7968 Below are the changes since 0.3.5.6-rc. For a complete list of changes
7969 since 0.3.4.9, see the ReleaseNotes file.
7971 o Major bugfixes (relay, directory):
7972 - Always reactivate linked connections in the main loop so long as
7973 any linked connection has been active. Previously, connections
7974 serving directory information wouldn't get reactivated after the
7975 first chunk of data was sent (usually 32KB), which would prevent
7976 clients from bootstrapping. Fixes bug 28912; bugfix on
7977 0.3.4.1-alpha. Patch by "cypherpunks3".
7979 o Minor features (compilation):
7980 - When possible, place our warning flags in a separate file, to
7981 avoid flooding verbose build logs. Closes ticket 28924.
7983 o Minor features (geoip):
7984 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
7985 Country database. Closes ticket 29012.
7987 o Minor features (OpenSSL bug workaround):
7988 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7989 key export function from handling long labels. When this bug is
7990 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7991 version of OpenSSL without this bug when it becomes available.
7992 Closes ticket 28973.
7994 o Minor features (performance):
7995 - Remove about 96% of the work from the function that we run at
7996 startup to test our curve25519_basepoint implementation. Since
7997 this function has yet to find an actual failure, we now only run
7998 it for 8 iterations instead of 200. Based on our profile
7999 information, this change should save around 8% of our startup time
8000 on typical desktops, and may have a similar effect on other
8001 platforms. Closes ticket 28838.
8002 - Stop re-validating our hardcoded Diffie-Hellman parameters on
8003 every startup. Doing this wasted time and cycles, especially on
8004 low-powered devices. Closes ticket 28851.
8006 o Minor bugfixes (compilation):
8007 - Fix compilation for Android by adding a missing header to
8008 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
8010 o Minor bugfixes (correctness):
8011 - Fix an unreached code path where we checked the value of
8012 "hostname" inside send_resolved_hostname_cell(). Previously, we
8013 used it before checking it; now we check it first. Fixes bug
8014 28879; bugfix on 0.1.2.7-alpha.
8016 o Minor bugfixes (testing):
8017 - Make sure that test_rebind.py actually obeys its timeout, even
8018 when it receives a large number of log messages. Fixes bug 28883;
8019 bugfix on 0.3.5.4-alpha.
8020 - Stop running stem's unit tests as part of "make test-stem", but
8021 continue to run stem's unit and online tests during "make test-
8022 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
8024 o Minor bugfixes (windows services):
8025 - Make Tor start correctly as an NT service again: previously it was
8026 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
8028 o Code simplification and refactoring:
8029 - When parsing a port configuration, make it more obvious to static
8030 analyzer tools that we always initialize the address. Closes
8034 Changes in version 0.3.5.6-rc - 2018-12-18
8035 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
8036 It is the first release candidate in the 0.3.5.x series; if no further
8037 huge bugs are found, our next release may be the stable 0.3.5.x.
8039 o Minor features (continuous integration, Windows):
8040 - Always show the configure and test logs, and upload them as build
8041 artifacts, when building for Windows using Appveyor CI.
8044 o Minor features (fallback directory list):
8045 - Replace the 150 fallbacks originally introduced in Tor
8046 0.3.3.1-alpha in January 2018 (of which ~115 were still
8047 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
8048 removed) generated in December 2018. Closes ticket 24803.
8050 o Minor features (geoip):
8051 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
8052 Country database. Closes ticket 28744.
8054 o Minor bugfixes (compilation):
8055 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
8056 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
8058 o Minor bugfixes (continuous integration, Windows):
8059 - Explicitly specify the path to the OpenSSL library and do not
8060 download OpenSSL from Pacman, but instead use the library that is
8061 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
8063 o Minor bugfixes (onion service v3):
8064 - When deleting an ephemeral onion service (DEL_ONION), do not close
8065 any rendezvous circuits in order to let the existing client
8066 connections finish by themselves or closed by the application. The
8067 HS v2 is doing that already so now we have the same behavior for
8068 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
8070 o Minor bugfixes (restart-in-process, boostrap):
8071 - Add missing resets of bootstrap tracking state when shutting down
8072 (regression caused by ticket 27169). Fixes bug 28524; bugfix
8075 o Minor bugfixes (testing):
8076 - Use a separate DataDirectory for the test_rebind script.
8077 Previously, this script would run using the default DataDirectory,
8078 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
8079 Patch from Taylor R Campbell.
8080 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
8081 bugfix on 0.3.0.1-alpha.
8083 o Minor bugfixes (Windows):
8084 - Correctly identify Windows 8.1, Windows 10, and Windows Server
8085 2008 and later from their NT versions. Fixes bug 28096; bugfix on
8086 0.2.2.34; reported by Keifer Bly.
8087 - On recent Windows versions, the GetVersionEx() function may report
8088 an earlier Windows version than the running OS. To avoid user
8089 confusion, add "[or later]" to Tor's version string on affected
8090 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
8092 - Remove Windows versions that were never supported by the
8093 GetVersionEx() function. Stop duplicating the latest Windows
8094 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
8095 reported by Keifer Bly.
8098 - Increase logging and tag all log entries with timestamps in
8099 test_rebind.py. Provides diagnostics for issue 28229.
8101 o Code simplification and refactoring (shared random, dirauth):
8102 - Change many tor_assert() to use BUG() instead. The idea is to not
8103 crash a dirauth but rather scream loudly with a stacktrace and let
8104 it continue run. The shared random subsystem is very resilient and
8105 if anything wrong happens with it, at worst a non coherent value
8106 will be put in the vote and discarded by the other authorities.
8107 Closes ticket 19566.
8109 o Documentation (onion services):
8110 - Document in the man page that changing ClientOnionAuthDir value or
8111 adding a new file in the directory will not work at runtime upon
8112 sending a HUP if Sandbox 1. Closes ticket 28128.
8113 - Note in the man page that the only real way to fully revoke an
8114 onion service v3 client authorization is by restarting the tor
8115 process. Closes ticket 28275.
8118 Changes in version 0.3.5.5-alpha - 2018-11-16
8119 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
8120 including several that we hope to backport to older release series in
8123 o Major bugfixes (OpenSSL, portability):
8124 - Fix our usage of named groups when running as a TLS 1.3 client in
8125 OpenSSL 1.1.1. Previously, we only initialized EC groups when
8126 running as a relay, which caused clients to fail to negotiate TLS
8127 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
8130 o Minor features (geoip):
8131 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
8132 Country database. Closes ticket 28395.
8134 o Minor bugfixes (compilation):
8135 - Initialize a variable unconditionally in aes_new_cipher(), since
8136 some compilers cannot tell that we always initialize it before
8137 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
8139 o Minor bugfixes (connection, relay):
8140 - Avoid a logging a BUG() stacktrace when closing connection held
8141 open because the write side is rate limited but not the read side.
8142 Now, the connection read side is simply shut down until Tor is
8143 able to flush the connection and close it. Fixes bug 27750; bugfix
8146 o Minor bugfixes (continuous integration, Windows):
8147 - Manually configure the zstd compiler options, when building using
8148 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
8149 not come with a pkg-config file. Fixes bug 28454; bugfix
8151 - Stop using an external OpenSSL install, and stop installing MSYS2
8152 packages, when building using mingw on Appveyor Windows CI. Fixes
8153 bug 28399; bugfix on 0.3.4.1-alpha.
8155 o Minor bugfixes (documentation):
8156 - Make Doxygen work again after the code movement in the 0.3.5
8157 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
8159 o Minor bugfixes (Linux seccomp2 sandbox):
8160 - Permit the "shutdown()" system call, which is apparently used by
8161 OpenSSL under some circumstances. Fixes bug 28183; bugfix
8164 o Minor bugfixes (logging):
8165 - Stop talking about the Named flag in log messages. Clients have
8166 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
8169 o Minor bugfixes (memory leaks):
8170 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
8171 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
8173 o Minor bugfixes (onion services):
8174 - On an intro point for a version 3 onion service, stop closing
8175 introduction circuits on an NACK. This lets the client decide
8176 whether to reuse the circuit or discard it. Previously, we closed
8177 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
8178 0.3.2.1-alpha. Patch by Neel Chaunan.
8179 - When replacing a descriptor in the client cache, make sure to
8180 close all client introduction circuits for the old descriptor, so
8181 we don't end up with unusable leftover circuits. Fixes bug 27471;
8182 bugfix on 0.3.2.1-alpha.
8185 Changes in version 0.3.5.4-alpha - 2018-11-08
8186 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
8187 improves our continuous integration support. It continues our attempts
8188 to stabilize this alpha branch and build it into a foundation for an
8189 acceptable long-term-support release.
8191 o Major bugfixes (compilation, rust):
8192 - Rust tests can now build and run successfully with the
8193 --enable-fragile-hardening option enabled. Doing this currently
8194 requires the rust beta channel; it will be possible with stable
8195 rust once Rust version 1.31 is released. Patch from Alex Crichton.
8196 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
8198 o Major bugfixes (embedding, main loop):
8199 - When DisableNetwork becomes set, actually disable periodic events
8200 that are already enabled. (Previously, we would refrain from
8201 enabling new ones, but we would leave the old ones turned on.)
8202 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
8204 o Minor features (continuous integration):
8205 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
8207 - Add new CI job to Travis configuration to run stem-based
8208 integration tests. Closes ticket 27913.
8210 o Minor features (Windows, continuous integration):
8211 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
8212 Appveyor's CI. Closes ticket 28318.
8214 o Minor bugfixes (C correctness, also in 0.3.4.9):
8215 - Avoid undefined behavior in an end-of-string check when parsing
8216 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8219 o Minor bugfixes (compilation):
8220 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
8221 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
8223 o Minor bugfixes (compilation, OpenSolaris):
8224 - Fix compilation on OpenSolaris and its descendants by adding a
8225 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
8228 o Minor bugfixes (configuration):
8229 - Refuse to start with relative file paths and RunAsDaemon set
8230 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
8233 o Minor bugfixes (directory authority, also in 0.3.4.9):
8234 - Log additional info when we get a relay that shares an ed25519 ID
8235 with a different relay, instead of a BUG() warning with a
8236 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
8238 o Minor bugfixes (onion service v3):
8239 - Build the service descriptor's signing key certificate before
8240 uploading, so we always have a fresh one: leaving no chances for
8241 it to expire service side. Fixes bug 27838; bugfix
8244 o Minor bugfixes (onion service v3, client authorization):
8245 - Fix an assert() when adding a client authorization for the first
8246 time and then sending a HUP signal to the service. Before that,
8247 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
8249 o Minor bugfixes (onion services):
8250 - Unless we have explicitly set HiddenServiceVersion, detect the
8251 onion service version and then look for invalid options.
8252 Previously, we did the reverse, but that broke existing configs
8253 which were pointed to a v2 service and had options like
8254 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
8255 0.3.5.1-alpha. Patch by Neel Chauhan.
8257 o Minor bugfixes (portability):
8258 - Make the OPE code (which is used for v3 onion services) run
8259 correctly on big-endian platforms. Fixes bug 28115; bugfix
8262 o Minor bugfixes (protover, rust):
8263 - Reject extra commas in version strings. Fixes bug 27197; bugfix
8266 o Minor bugfixes (relay shutdown, systemd):
8267 - Notify systemd of ShutdownWaitLength so it can be set to longer
8268 than systemd's TimeoutStopSec. In Tor's systemd service file, set
8269 TimeoutSec to 60 seconds to allow Tor some time to shut down.
8270 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
8272 o Minor bugfixes (rust, also in 0.3.4.9):
8273 - Fix a potential null dereference in protover_all_supported(). Add
8274 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8275 - Return a string that can be safely freed by C code, not one
8276 created by the rust allocator, in protover_all_supported(). Fixes
8277 bug 27740; bugfix on 0.3.3.1-alpha.
8279 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
8280 - Fix an API mismatch in the rust implementation of
8281 protover_compute_vote(). This bug could have caused crashes on any
8282 directory authorities running Tor with Rust (which we do not yet
8283 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8285 o Minor bugfixes (testing):
8286 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
8287 27968; bugfix on 0.3.5.1-alpha.
8289 o Minor bugfixes (testing, also in 0.3.4.9):
8290 - Treat backtrace test failures as expected on BSD-derived systems
8291 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8292 (FreeBSD failures have been treated as expected since 18204 in
8293 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8295 o Documentation (onion service manpage):
8296 - Improve HSv3 client authorization by making some options more
8297 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
8300 Changes in version 0.3.4.9 - 2018-11-02
8301 Tor 0.3.4.9 is the second stable release in its series; it backports
8302 numerous fixes, including a fix for a bandwidth management bug that
8303 was causing memory exhaustion on relays. Anyone running an earlier
8304 version of Tor 0.3.4.9 should upgrade.
8306 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
8307 - Fix compilation on ARM (and other less-used CPUs) when compiling
8308 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8310 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
8311 - Make sure Tor bootstraps and works properly if only the
8312 ControlPort is set. Prior to this fix, Tor would only bootstrap
8313 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8314 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8316 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
8317 - When our write bandwidth limit is exhausted, stop writing on the
8318 connection. Previously, we had a typo in the code that would make
8319 us stop reading instead, leading to relay connections being stuck
8320 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8323 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
8324 - Fix a use-after-free error that could be caused by passing Tor an
8325 impossible set of options that would fail during options_act().
8326 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8328 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
8329 - Don't do a distcheck with --disable-module-dirauth in Travis.
8330 Implements ticket 27252.
8331 - Only run one online rust build in Travis, to reduce network
8332 errors. Skip offline rust builds on Travis for Linux gcc, because
8333 they're redundant. Implements ticket 27252.
8334 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8335 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8336 Linux with default settings, because all the non-default builds
8337 use gcc on Linux. Implements ticket 27252.
8339 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
8340 - Use the Travis Homebrew addon to install packages on macOS during
8341 Travis CI. The package list is the same, but the Homebrew addon
8342 does not do a `brew update` by default. Implements ticket 27738.
8344 o Minor features (geoip):
8345 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8346 Country database. Closes ticket 27991.
8348 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
8349 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8350 difference algorithm for 32-bit Apple platforms. Previously, it
8351 would overflow when calculating the difference between two times
8352 more than 47 days apart. Fixes part of bug 27139; bugfix
8354 - Improve the precision of our 32-bit millisecond difference
8355 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8356 bugfix on 0.3.4.1-alpha.
8357 - Relax the tolerance on the mainloop/update_time_jumps test when
8358 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8361 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
8362 - Avoid undefined behavior in an end-of-string check when parsing
8363 the BEGIN line in a directory object. Fixes bug 28202; bugfix
8366 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
8367 - Only install the necessary mingw packages during our appveyor
8368 builds. This change makes the build a little faster, and prevents
8369 a conflict with a preinstalled mingw openssl that appveyor now
8370 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
8372 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
8373 - Rewrite our assertion macros so that they no longer suppress the
8374 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8376 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
8377 - Stop reinstalling identical packages in our Windows CI. Fixes bug
8378 27464; bugfix on 0.3.4.1-alpha.
8380 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
8381 - Log additional info when we get a relay that shares an ed25519 ID
8382 with a different relay, instead making a BUG() warning. Fixes bug
8383 27800; bugfix on 0.3.2.1-alpha.
8385 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
8386 - Avoid a double-close when shutting down a stalled directory
8387 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8389 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
8390 - Fix a bug warning when closing an HTTP tunnel connection due to an
8391 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8394 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
8395 - Ensure circuitmux queues are empty before scheduling or sending
8396 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8398 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
8399 - When the onion service directory can't be created or has the wrong
8400 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8403 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
8404 - Close all SOCKS request (for the same .onion) if the newly fetched
8405 descriptor is unusable. Before that, we would close only the first
8406 one leaving the other hanging and let to time out by themselves.
8407 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8409 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
8410 - When selecting a v3 rendezvous point, don't only look at the
8411 protover, but also check whether the curve25519 onion key is
8412 present. This way we avoid picking a relay that supports the v3
8413 rendezvous but for which we don't have the microdescriptor. Fixes
8414 bug 27797; bugfix on 0.3.2.1-alpha.
8416 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
8417 - Reject protocol names containing bytes other than alphanumeric
8418 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8421 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
8422 - Compute protover votes correctly in the rust version of the
8423 protover code. Previously, the protover rewrite in 24031 allowed
8424 repeated votes from the same voter for the same protocol version
8425 to be counted multiple times in protover_compute_vote(). Fixes bug
8426 27649; bugfix on 0.3.3.5-rc.
8427 - Reject protover names that contain invalid characters. Fixes bug
8428 27687; bugfix on 0.3.3.1-alpha.
8430 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
8431 - protover_all_supported() would attempt to allocate up to 16GB on
8432 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8433 bugfix on 0.3.3.5-rc.
8435 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
8436 - Fix an API mismatch in the rust implementation of
8437 protover_compute_vote(). This bug could have caused crashes on any
8438 directory authorities running Tor with Rust (which we do not yet
8439 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
8441 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
8442 - Fix a potential null dereference in protover_all_supported(). Add
8443 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
8444 - Return a string that can be safely freed by C code, not one
8445 created by the rust allocator, in protover_all_supported(). Fixes
8446 bug 27740; bugfix on 0.3.3.1-alpha.
8448 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
8449 - If a unit test running in a subprocess exits abnormally or with a
8450 nonzero status code, treat the test as having failed, even if the
8451 test reported success. Without this fix, memory leaks don't cause
8452 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8453 bugfix on 0.2.2.4-alpha.
8455 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
8456 - Make the hs_service tests use the same time source when creating
8457 the introduction point and when testing it. Now tests work better
8458 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8461 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
8462 - Treat backtrace test failures as expected on BSD-derived systems
8463 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
8464 (FreeBSD failures have been treated as expected since 18204 in
8465 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
8468 Changes in version 0.3.5.3-alpha - 2018-10-17
8469 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
8470 versions. One important fix for relays addresses a problem with rate-
8471 limiting code from back in 0.3.4.x: If the fix works out, we'll be
8472 backporting it soon. This release is still an alpha, but we hope it's
8473 getting closer and closer to stability.
8475 o Major features (onion services):
8476 - Version 3 onion services can now use the per-service
8477 HiddenServiceExportCircuitID option to differentiate client
8478 circuits. It communicates with the service by using the HAProxy
8479 protocol to assign virtual IP addresses to inbound client
8480 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
8482 o Major bugfixes (compilation):
8483 - Fix compilation on ARM (and other less-used CPUs) when compiling
8484 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
8486 o Major bugfixes (initialization, crash):
8487 - Fix an assertion crash that would stop Tor from starting up if it
8488 tried to activate a periodic event too early. Fixes bug 27861;
8489 bugfix on 0.3.5.1-alpha.
8491 o Major bugfixes (mainloop, bootstrap):
8492 - Make sure Tor bootstraps and works properly if only the
8493 ControlPort is set. Prior to this fix, Tor would only bootstrap
8494 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
8495 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
8497 o Major bugfixes (relay):
8498 - When our write bandwidth limit is exhausted, stop writing on the
8499 connection. Previously, we had a typo in the code that would make
8500 us stop reading instead, leading to relay connections being stuck
8501 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
8504 o Minor features (continuous integration):
8505 - Use the Travis Homebrew addon to install packages on macOS during
8506 Travis CI. The package list is the same, but the Homebrew addon
8507 does not do a `brew update` by default. Implements ticket 27738.
8508 - Report what program produced the mysterious core file that we
8509 occasionally see on Travis CI during make distcheck. Closes
8512 o Minor features (geoip):
8513 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
8514 Country database. Closes ticket 27991.
8516 o Minor bugfixes (code safety):
8517 - Rewrite our assertion macros so that they no longer suppress the
8518 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
8521 o Minor bugfixes (compilation):
8522 - Compile the ed25519-donna code with a correct declaration of
8523 crypto_strongest_rand(). Previously, we built it with one type,
8524 but linked it against another in the unit tests, which caused
8525 compilation failures with LTO enabled. This could have caused
8526 other undefined behavior in the tests. Fixes bug 27728; bugfix
8529 o Minor bugfixes (compilation, netbsd):
8530 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
8533 o Minor bugfixes (continuous integration, appveyor):
8534 - Install only the necessary mingw packages during our appveyor
8535 builds. This change makes the build a little faster, and prevents
8536 a conflict with a preinstalled mingw openssl that appveyor now
8537 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
8539 o Minor bugfixes (directory permissions):
8540 - When a user requests a group-readable DataDirectory, give it to
8541 them. Previously, when the DataDirectory and the CacheDirectory
8542 were the same, the default setting (0) for
8543 CacheDirectoryGroupReadable would override the setting for
8544 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
8547 o Minor bugfixes (memory leaks):
8548 - Fix a small memory leak when calling Tor with --dump-config. Fixes
8549 bug 27893; bugfix on 0.3.2.1-alpha.
8551 o Minor bugfixes (networking):
8552 - In retry_listeners_ports(), make sure that we're removing a member
8553 of old_conns smartlist at most once. Fixes bug 27808; bugfix
8555 - Refrain from attempting socket rebinding when old and new
8556 listeners are in different address families. Fixes bug 27928;
8557 bugfix on 0.3.5.1-alpha.
8559 o Minor bugfixes (onion service v3):
8560 - Stop dumping a stack trace when trying to connect to an intro
8561 point without having a descriptor for it. Fixes bug 27774; bugfix
8563 - Don't warn so loudly when Tor is unable to decode an onion
8564 descriptor. This can now happen as a normal use case if a client
8565 gets a descriptor with client authorization but the client is not
8566 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
8567 - When selecting a v3 rendezvous point, don't only look at the
8568 protover, but also check whether the curve25519 onion key is
8569 present. This way we avoid picking a relay that supports the v3
8570 rendezvous but for which we don't have the microdescriptor. Fixes
8571 bug 27797; bugfix on 0.3.2.1-alpha.
8573 o Minor bugfixes (protover):
8574 - Reject protocol names containing bytes other than alphanumeric
8575 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
8578 o Minor bugfixes (testing):
8579 - Make the hs_service tests use the same time source when creating
8580 the introduction point and when testing it. Now tests work better
8581 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
8583 - In test_rebind.py, check if the Python version is in the supported
8584 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
8586 o Code simplification and refactoring:
8587 - Divide more large Tor source files -- especially ones that span
8588 multiple areas of functionality -- into smaller parts, including
8589 onion.c and main.c. Closes ticket 26747.
8590 - Divide the "routerparse.c" module into separate modules for each
8591 group of parsed objects. Closes ticket 27924.
8592 - Move protover_rust.c to the same place protover.c was moved to.
8593 Closes ticket 27814.
8594 - Split directory.c into separate pieces for client, server, and
8595 common functionality. Closes ticket 26744.
8596 - Split the non-statistics-related parts from the rephist.c and
8597 geoip.c modules. Closes ticket 27892.
8598 - Split the router.c file into relay-only and shared components, to
8599 help with future modularization. Closes ticket 27864.
8602 - In the tor-resolve(1) manpage, fix the reference to socks-
8603 extensions.txt by adding a web URL. Resolves ticket 27853.
8604 - Mention that we require Python to be 2.7 or newer for some
8605 integration tests that we ship with Tor. Resolves ticket 27677.
8608 Changes in version 0.3.5.2-alpha - 2018-09-21
8609 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
8610 that made Tor think it had run out of sockets. Anybody running a relay
8611 or an onion service on 0.3.5.1-alpha should upgrade.
8613 o Major bugfixes (relay bandwidth statistics):
8614 - When we close relayed circuits, report the data in the circuit
8615 queues as being written in our relay bandwidth stats. This
8616 mitigates guard discovery and other attacks that close circuits
8617 for the explicit purpose of noticing this discrepancy in
8618 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
8620 o Major bugfixes (socket accounting):
8621 - In our socket accounting code, count a socket as closed even when
8622 it is closed indirectly by the TLS layer. Previously, we would
8623 count these sockets as still in use, and incorrectly believe that
8624 we had run out of sockets. Fixes bug 27795; bugfix
8627 o Minor bugfixes (32-bit OSX and iOS, timing):
8628 - Fix an integer overflow bug in our optimized 32-bit millisecond-
8629 difference algorithm for 32-bit Apple platforms. Previously, it
8630 would overflow when calculating the difference between two times
8631 more than 47 days apart. Fixes part of bug 27139; bugfix
8633 - Improve the precision of our 32-bit millisecond difference
8634 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
8635 bugfix on 0.3.4.1-alpha.
8636 - Relax the tolerance on the mainloop/update_time_jumps test when
8637 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
8640 o Minor bugfixes (onion service v3):
8641 - Close all SOCKS request (for the same .onion) if the newly fetched
8642 descriptor is unusable. Before that, we would close only the first
8643 one leaving the other hanging and let to time out by themselves.
8644 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
8646 o Minor bugfixes (memory leak):
8647 - Fix an unlikely memory leak when trying to read a private key from
8648 a ridiculously large file. Fixes bug 27764; bugfix on
8649 0.3.5.1-alpha. This is CID 1439488.
8651 o Minor bugfixes (NSS):
8652 - Correctly detect failure to open a dummy TCP socket when stealing
8653 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
8656 o Minor bugfixes (rust):
8657 - protover_all_supported() would attempt to allocate up to 16GB on
8658 some inputs, leading to a potential memory DoS. Fixes bug 27206;
8659 bugfix on 0.3.3.5-rc.
8661 o Minor bugfixes (testing):
8662 - Revise the "conditionvar_timeout" test so that it succeeds even on
8663 heavily loaded systems where the test threads are not scheduled
8664 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
8666 o Code simplification and refactoring:
8667 - Divide the routerlist.c and dirserv.c modules into smaller parts.
8668 Closes ticket 27799.
8671 Changes in version 0.3.5.1-alpha - 2018-09-18
8672 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
8673 client authorization for modern (v3) onion services, improves
8674 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
8675 support for NSS in place of OpenSSL, and much more.
8677 o Major features (onion services, UI change):
8678 - For a newly created onion service, the default version is now 3.
8679 Tor still supports existing version 2 services, but the operator
8680 now needs to set "HiddenServiceVersion 2" in order to create a new
8681 version 2 service. For existing services, Tor now learns the
8682 version by reading the key file. Closes ticket 27215.
8684 o Major features (relay, UI change):
8685 - Relays no longer run as exits by default. If the "ExitRelay"
8686 option is auto (or unset), and no exit policy is specified with
8687 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
8688 Previously in this case, we allowed exit traffic and logged a
8689 warning message. Closes ticket 21530. Patch by Neel Chauhan.
8690 - Tor now validates that the ContactInfo config option is valid UTF-
8691 8 when parsing torrc. Closes ticket 27428.
8693 o Major features (bootstrap):
8694 - Don't report directory progress until after a connection to a
8695 relay or bridge has succeeded. Previously, we'd report 80%
8696 progress based on cached directory information when we couldn't
8697 even connect to the network. Closes ticket 27169.
8699 o Major features (new code layout):
8700 - Nearly all of Tor's source code has been moved around into more
8701 logical places. The "common" directory is now divided into a set
8702 of libraries in "lib", and files in the "or" directory have been
8703 split into "core" (logic absolutely needed for onion routing),
8704 "feature" (independent modules in Tor), and "app" (to configure
8705 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
8706 more information. Closes ticket 26481.
8708 This refactoring is not complete: although the libraries have been
8709 refactored to be acyclic, the main body of Tor is still too
8710 interconnected. We will attempt to improve this in the future.
8712 o Major features (onion services v3):
8713 - Implement onion service client authorization at the descriptor
8714 level: only authorized clients can decrypt a service's descriptor
8715 to find out how to contact it. A new torrc option was added to
8716 control this client side: ClientOnionAuthDir <path>. On the
8717 service side, if the "authorized_clients/" directory exists in the
8718 onion service directory path, client configurations are read from
8719 the files within. See the manpage for more details. Closes ticket
8720 27547. Patch done by Suphanat Chunhapanya (haxxpop).
8721 - Improve revision counter generation in next-gen onion services.
8722 Onion services can now scale by hosting multiple instances on
8723 different hosts without synchronization between them, which was
8724 previously impossible because descriptors would get rejected by
8725 HSDirs. Addresses ticket 25552.
8727 o Major features (portability, cryptography, experimental, TLS):
8728 - Tor now has the option to compile with the NSS library instead of
8729 OpenSSL. This feature is experimental, and we expect that bugs may
8730 remain. It is mainly intended for environments where Tor's
8731 performance is not CPU-bound, and where NSS is already known to be
8732 installed. To try it out, configure Tor with the --enable-nss
8733 flag. Closes tickets 26631, 26815, and 26816.
8735 If you are experimenting with this option and using an old cached
8736 consensus, Tor may fail to start. To solve this, delete your
8737 "cached-consensus" and "cached-microdesc-consensus" files,
8738 (if present), and restart Tor.
8740 o Major bugfixes (directory authority):
8741 - Actually check that the address we get from DirAuthority
8742 configuration line is valid IPv4. Explicitly disallow DirAuthority
8743 address to be a DNS hostname. Fixes bug 26488; bugfix
8746 o Major bugfixes (restart-in-process):
8747 - Fix a use-after-free error that could be caused by passing Tor an
8748 impossible set of options that would fail during options_act().
8749 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
8751 o Minor features (admin tools):
8752 - Add a new --key-expiration option to print the expiration date of
8753 the signing cert in an ed25519_signing_cert file. Resolves
8756 o Minor features (build):
8757 - If you pass the "--enable-pic" option to configure, Tor will try
8758 to tell the compiler to build position-independent code suitable
8759 to link into a dynamic library. (The default remains -fPIE, for
8760 code suitable for a relocatable executable.) Closes ticket 23846.
8762 o Minor features (code correctness, testing):
8763 - Tor's build process now includes a "check-includes" make target to
8764 verify that no module of Tor relies on any headers from a higher-
8765 level module. We hope to use this feature over time to help
8766 refactor our codebase. Closes ticket 26447.
8768 o Minor features (code layout):
8769 - We have a new "lowest-level" error-handling API for use by code
8770 invoked from within the logging module. With this interface, the
8771 logging code is no longer at risk of calling into itself if a
8772 failure occurs while it is trying to log something. Closes
8775 o Minor features (compilation):
8776 - Tor's configure script now supports a --with-malloc= option to
8777 select your malloc implementation. Supported options are
8778 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
8779 default). Addresses part of ticket 20424. Based on a patch from
8782 o Minor features (config):
8783 - The "auto" keyword in torrc is now case-insensitive. Closes
8786 o Minor features (continuous integration):
8787 - Don't do a distcheck with --disable-module-dirauth in Travis.
8788 Implements ticket 27252.
8789 - Install libcap-dev and libseccomp2-dev so these optional
8790 dependencies get tested on Travis CI. Closes ticket 26560.
8791 - Only run one online rust build in Travis, to reduce network
8792 errors. Skip offline rust builds on Travis for Linux gcc, because
8793 they're redundant. Implements ticket 27252.
8794 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
8795 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
8796 Linux with default settings, because all the non-default builds
8797 use gcc on Linux. Implements ticket 27252.
8799 o Minor features (controller):
8800 - Emit CIRC_BW events as soon as we detect that we processed an
8801 invalid or otherwise dropped cell on a circuit. This allows
8802 vanguards and other controllers to react more quickly to dropped
8803 cells. Closes ticket 27678.
8804 - For purposes of CIRC_BW-based dropped cell detection, track half-
8805 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
8806 bias check cells to arrive without counting it as dropped until
8807 either the END arrives, or the windows are empty. Closes
8809 - Implement a 'GETINFO md/all' controller command to enable getting
8810 all known microdescriptors. Closes ticket 8323.
8811 - The GETINFO command now support an "uptime" argument, to return
8812 Tor's uptime in seconds. Closes ticket 25132.
8814 o Minor features (denial-of-service avoidance):
8815 - Make our OOM handler aware of the DNS cache so that it doesn't
8816 fill up the memory. This check is important for our DoS mitigation
8817 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
8819 o Minor features (development):
8820 - Tor's makefile now supports running the "clippy" Rust style tool
8821 on our Rust code. Closes ticket 22156.
8823 o Minor features (directory authority):
8824 - There is no longer an artificial upper limit on the length of
8825 bandwidth lines. Closes ticket 26223.
8826 - When a bandwidth file is used to obtain the bandwidth measurements,
8827 include this bandwidth file headers in the votes. Closes
8829 - Improved support for networks with only a single authority or a
8830 single fallback directory. Patch from Gabriel Somlo. Closes
8833 o Minor features (embedding API):
8834 - The Tor controller API now supports a function to launch Tor with
8835 a preconstructed owning controller FD, so that embedding
8836 applications don't need to manage controller ports and
8837 authentication. Closes ticket 24204.
8838 - The Tor controller API now has a function that returns the name
8839 and version of the backend implementing the API. Closes
8842 o Minor features (geoip):
8843 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
8844 Country database. Closes ticket 27631.
8846 o Minor features (memory management):
8847 - Get Libevent to use the same memory allocator as Tor, by calling
8848 event_set_mem_functions() during initialization. Resolves
8851 o Minor features (memory usage):
8852 - When not using them, store legacy TAP public onion keys in DER-
8853 encoded format, rather than as expanded public keys. This should
8854 save several megabytes on typical clients. Closes ticket 27246.
8856 o Minor features (OpenSSL):
8857 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
8858 than our own. Resolves ticket 19979.
8860 o Minor features (Rust, code quality):
8861 - Improve rust code quality in the rust protover implementation by
8862 making it more idiomatic. Includes changing an internal API to
8863 take &str instead of &String. Closes ticket 26492.
8865 o Minor features (testing):
8866 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
8867 chutney. Implements ticket 27211.
8869 o Minor features (tor-resolve):
8870 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
8871 Side-effect of the refactoring for ticket 26526.
8873 o Minor features (UI):
8874 - Log each included configuration file or directory as we read it,
8875 to provide more visibility about where Tor is reading from. Patch
8876 from Unto Sten; closes ticket 27186.
8877 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
8878 Closes ticket 26703.
8880 o Minor bugfixes (bootstrap):
8881 - Try harder to get descriptors in non-exit test networks, by using
8882 the mid weight for the third hop when there are no exits. Fixes
8883 bug 27237; bugfix on 0.2.6.2-alpha.
8885 o Minor bugfixes (C correctness):
8886 - Avoid casting smartlist index to int implicitly, as it may trigger
8887 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
8888 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
8889 - Use time_t for all values in
8890 predicted_ports_prediction_time_remaining(). Rework the code that
8891 computes difference between durations/timestamps. Fixes bug 27165;
8892 bugfix on 0.3.1.1-alpha.
8894 o Minor bugfixes (client, memory usage):
8895 - When not running as a directory cache, there is no need to store
8896 the text of the current consensus networkstatus in RAM.
8897 Previously, however, clients would store it anyway, at a cost of
8898 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
8901 o Minor bugfixes (client, reachableaddresses):
8902 - Instead of adding a "reject *:*" line to ReachableAddresses when
8903 loading the configuration, add one to the policy after parsing it
8904 in parse_reachable_addresses(). This prevents extra "reject *.*"
8905 lines from accumulating on reloads. Fixes bug 20874; bugfix on
8906 0.1.1.5-alpha. Patch by Neel Chauhan.
8908 o Minor bugfixes (code quality):
8909 - Rename sandbox_getaddrinfo() and other functions to no longer
8910 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
8911 bugfix on 0.2.7.1-alpha.
8913 o Minor bugfixes (configuration, Onion Services):
8914 - In rend_service_parse_port_config(), disallow any input to remain
8915 after address-port pair was parsed. This will catch address and
8916 port being whitespace-separated by mistake of the user. Fixes bug
8917 27044; bugfix on 0.2.9.10.
8919 o Minor bugfixes (continuous integration):
8920 - Stop reinstalling identical packages in our Windows CI. Fixes bug
8921 27464; bugfix on 0.3.4.1-alpha.
8923 o Minor bugfixes (controller):
8924 - Consider all routerinfo errors other than "not a server" to be
8925 transient for the purpose of "GETINFO exit-policy/*" controller
8926 request. Print stacktrace in the unlikely case of failing to
8927 recompute routerinfo digest. Fixes bug 27034; bugfix
8930 o Minor bugfixes (directory connection shutdown):
8931 - Avoid a double-close when shutting down a stalled directory
8932 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8934 o Minor bugfixes (HTTP tunnel):
8935 - Fix a bug warning when closing an HTTP tunnel connection due to an
8936 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8939 o Minor bugfixes (ipv6):
8940 - In addrs_in_same_network_family(), we choose the subnet size based
8941 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
8942 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
8943 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
8945 o Minor bugfixes (logging):
8946 - As a precaution, do an early return from log_addr_has_changed() if
8947 Tor is running as client. Also, log a stack trace for debugging as
8948 this function should only be called when Tor runs as server. Fixes
8949 bug 26892; bugfix on 0.1.1.9-alpha.
8950 - Refrain from mentioning bug 21018 in the logs, as it is already
8951 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
8953 o Minor bugfixes (logging, documentation):
8954 - When SafeLogging is enabled, scrub IP address in
8955 channel_tls_process_netinfo_cell(). Also, add a note to manpage
8956 that scrubbing is not guaranteed on loglevels below Notice. Fixes
8957 bug 26882; bugfix on 0.2.4.10-alpha.
8959 o Minor bugfixes (netflow padding):
8960 - Ensure circuitmux queues are empty before scheduling or sending
8961 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8963 o Minor bugfixes (onion service v2):
8964 - Log at level "info", not "warning", in the case that we do not
8965 have a consensus when a .onion request comes in. This can happen
8966 normally while bootstrapping. Fixes bug 27040; bugfix
8969 o Minor bugfixes (onion service v3):
8970 - When the onion service directory can't be created or has the wrong
8971 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8974 o Minor bugfixes (OS compatibility):
8975 - Properly handle configuration changes that move a listener to/from
8976 wildcard IP address. If the first attempt to bind a socket fails,
8977 close the old listener and try binding the socket again. Fixes bug
8978 17873; bugfix on 0.0.8pre-1.
8980 o Minor bugfixes (performance)::
8981 - Rework node_is_a_configured_bridge() to no longer call
8982 node_get_all_orports(), which was performing too many memory
8983 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
8985 o Minor bugfixes (relay statistics):
8986 - Update relay descriptor on bandwidth changes only when the uptime
8987 is smaller than 24h, in order to reduce the efficiency of guard
8988 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8990 o Minor bugfixes (relays):
8991 - Consider the fact that we'll be making direct connections to our
8992 entry and guard nodes when computing the fraction of nodes that
8993 have their descriptors. Also, if we are using bridges and there is
8994 at least one bridge with a full descriptor, treat the fraction of
8995 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
8996 Patch by Neel Chauhan.
8997 - Update the message logged on relays when DirCache is disabled.
8998 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
8999 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
9001 o Minor bugfixes (rust, protover):
9002 - Compute protover votes correctly in the rust version of the
9003 protover code. Previously, the protover rewrite in 24031 allowed
9004 repeated votes from the same voter for the same protocol version
9005 to be counted multiple times in protover_compute_vote(). Fixes bug
9006 27649; bugfix on 0.3.3.5-rc.
9007 - Reject protover names that contain invalid characters. Fixes bug
9008 27687; bugfix on 0.3.3.1-alpha.
9010 o Minor bugfixes (testing):
9011 - Fix two unit tests to work when HOME environment variable is not
9012 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
9013 - If a unit test running in a subprocess exits abnormally or with a
9014 nonzero status code, treat the test as having failed, even if the
9015 test reported success. Without this fix, memory leaks don't cause
9016 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
9017 bugfix on 0.2.2.4-alpha.
9018 - When logging a version mismatch in our openssl_version tests,
9019 report the actual offending version strings. Fixes bug 26152;
9020 bugfix on 0.2.9.1-alpha.
9021 - Fix forking tests on Windows when there is a space somewhere in
9022 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
9024 o Code simplification and refactoring:
9025 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
9026 longer needed. Closes ticket 26502.
9027 - Include paths to header files within Tor are now qualified by
9028 directory within the top-level src directory.
9029 - Many structures have been removed from the centralized "or.h"
9030 header, and moved into their own headers. This will allow us to
9031 reduce the number of places in the code that rely on each
9032 structure's contents and layout. Closes ticket 26383.
9033 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
9034 - Remove GetAdaptersAddresses_fn_t. The code that used it was
9035 removed as part of the 26481 refactor. Closes ticket 27467.
9036 - Rework Tor SOCKS server code to use Trunnel and benefit from
9037 autogenerated functions for parsing and generating SOCKS wire
9038 format. New implementation is cleaner, more maintainable and
9039 should be less prone to heartbleed-style vulnerabilities.
9040 Implements a significant fraction of ticket 3569.
9041 - Split sampled_guards_update_from_consensus() and
9042 select_entry_guard_for_circuit() into subfunctions. In
9043 entry_guards_update_primary() unite three smartlist enumerations
9044 into one and move smartlist comparison code out of the function.
9045 Closes ticket 21349.
9046 - Tor now assumes that you have standards-conformant stdint.h and
9047 inttypes.h headers when compiling. Closes ticket 26626.
9048 - Unify our bloom filter logic. Previously we had two copies of this
9049 code: one for routerlist filtering, and one for address set
9050 calculations. Closes ticket 26510.
9051 - Use the simpler strcmpstart() helper in
9052 rend_parse_v2_service_descriptor instead of strncmp(). Closes
9054 - Utility functions that can perform a DNS lookup are now wholly
9055 separated from those that can't, in separate headers and C
9056 modules. Closes ticket 26526.
9059 - Copy paragraph and URL to Tor's code of conduct document from
9060 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
9061 - Remove old instructions from INSTALL document. Closes ticket 26588.
9062 - Warn users that they should not include MyFamily line(s) in their
9063 torrc when running Tor bridge. Closes ticket 26908.
9066 - Tor no longer supports building with the dmalloc library. For
9067 debugging memory issues, we suggest using gperftools or msan
9068 instead. Closes ticket 26426.
9069 - Tor no longer attempts to run on Windows environments without the
9070 GetAdaptersAddresses() function. This function has existed since
9071 Windows XP, which is itself already older than we support.
9072 - Remove Tor2web functionality for version 2 onion services. The
9073 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
9074 (This feature was never shipped in vanilla Tor and it was only
9075 possible to use this feature by building the support at compile
9076 time. Tor2webMode is not implemented for version 3 onion services.)
9077 Closes ticket 26367.
9080 Changes in version 0.2.9.17 - 2018-09-10
9081 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
9083 o Minor features (compatibility, backport from 0.3.4.8):
9084 - Tell OpenSSL to maintain backward compatibility with previous
9085 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9086 ciphers are disabled by default. Closes ticket 27344.
9088 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9089 - Enable macOS builds in our Travis CI configuration. Closes
9091 - Install libcap-dev and libseccomp2-dev so these optional
9092 dependencies get tested on Travis CI. Closes ticket 26560.
9093 - Run asciidoc during Travis CI. Implements ticket 27087.
9094 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9096 o Minor features (geoip):
9097 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9098 Country database. Closes ticket 27089.
9100 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9101 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9102 tell the compiler not to include the system malloc implementation.
9103 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9105 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9106 - Silence a spurious compiler warning on the GetAdaptersAddresses
9107 function pointer cast. This issue is already fixed by 26481 in
9108 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9109 bugfix on 0.2.3.11-alpha.
9110 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9111 supported, and always fails. Some compilers warn about the
9112 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9115 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9116 - Don't link or search for pthreads when building for Windows, even
9117 if we are using build environment (like mingw) that provides a
9118 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9120 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9121 - Skip a pair of unreliable key generation tests on Windows, until
9122 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9123 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9125 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9126 - Pass the module flags to distcheck configure, and log the flags
9127 before running configure. (Backported to 0.2.9 and later as a
9128 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9130 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9131 - When a Travis build fails, and showing a log fails, keep trying to
9132 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9133 - When we use echo in Travis, don't pass a --flag as the first
9134 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9136 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9137 - When voting for recommended versions, make sure that all of the
9138 versions are well-formed and parsable. Fixes bug 26485; bugfix
9141 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9142 - Fix a bug in out sandboxing rules for the openat() syscall.
9143 Previously, no openat() call would be permitted, which would break
9144 filesystem operations on recent glibc versions. Fixes bug 25440;
9145 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9147 o Minor bugfixes (onion services, backport from 0.3.4.8):
9148 - Silence a spurious compiler warning in
9149 rend_client_send_introduction(). Fixes bug 27463; bugfix
9152 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9153 - Log a protocol warning when single onion services or Tor2web clients
9154 fail to authenticate direct connections to relays.
9155 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9157 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9158 - Disable core dumps in test_bt.sh, to avoid failures in "make
9159 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9161 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9162 - Before running make test-network-all, delete old logs and test
9163 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9166 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9167 - Our "tortls/cert_matches_key" unit test no longer relies on
9168 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9169 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9170 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9172 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9173 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9174 27185; bugfix on 0.2.2.2-alpha.
9177 Changes in version 0.3.2.12 - 2018-09-10
9178 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
9180 o Minor features (compatibility, backport from 0.3.4.8):
9181 - Tell OpenSSL to maintain backward compatibility with previous
9182 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9183 ciphers are disabled by default. Closes ticket 27344.
9185 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9186 - Enable macOS builds in our Travis CI configuration. Closes
9188 - Install libcap-dev and libseccomp2-dev so these optional
9189 dependencies get tested on Travis CI. Closes ticket 26560.
9190 - Run asciidoc during Travis CI. Implements ticket 27087.
9191 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9193 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9194 - Use cargo cache in our Travis CI configuration. Closes
9197 o Minor features (controller, backport from 0.3.4.6-rc):
9198 - The control port now exposes the list of HTTPTunnelPorts and
9199 ExtOrPorts via GETINFO net/listeners/httptunnel and
9200 net/listeners/extor respectively. Closes ticket 26647.
9202 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9203 - Authorities no longer vote to make the subprotocol version
9204 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9205 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9207 o Minor features (geoip):
9208 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9209 Country database. Closes ticket 27089.
9211 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9212 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9213 tell the compiler not to include the system malloc implementation.
9214 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9215 - Don't try to use a pragma to temporarily disable the
9216 -Wunused-const-variable warning if the compiler doesn't support
9217 it. Fixes bug 26785; bugfix on 0.3.2.11.
9219 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9220 - Silence a spurious compiler warning on the GetAdaptersAddresses
9221 function pointer cast. This issue is already fixed by 26481 in
9222 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9223 bugfix on 0.2.3.11-alpha.
9224 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9225 supported, and always fails. Some compilers warn about the
9226 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9229 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9230 - Don't link or search for pthreads when building for Windows, even
9231 if we are using build environment (like mingw) that provides a
9232 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9234 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9235 - Skip a pair of unreliable key generation tests on Windows, until
9236 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9237 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9239 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9240 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9241 - Pass the module flags to distcheck configure, and log the flags
9242 before running configure. (Backported to 0.2.9 and later as a
9243 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9245 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9246 - When a Travis build fails, and showing a log fails, keep trying to
9247 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9248 - When we use echo in Travis, don't pass a --flag as the first
9249 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9251 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9252 - When voting for recommended versions, make sure that all of the
9253 versions are well-formed and parsable. Fixes bug 26485; bugfix
9256 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9257 - Fix a bug in out sandboxing rules for the openat() syscall.
9258 Previously, no openat() call would be permitted, which would break
9259 filesystem operations on recent glibc versions. Fixes bug 25440;
9260 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9262 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9263 - Improve the log message when connection initiators fail to
9264 authenticate direct connections to relays. Fixes bug 26927; bugfix
9267 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9268 - Fix bug that causes services to not ever rotate their descriptors
9269 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9272 o Minor bugfixes (onion services, backport from 0.3.4.8):
9273 - Silence a spurious compiler warning in
9274 rend_client_send_introduction(). Fixes bug 27463; bugfix
9277 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9278 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9280 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9281 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9282 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9283 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9285 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9286 - Log a protocol warning when single onion services or Tor2web clients
9287 fail to authenticate direct connections to relays.
9288 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9290 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9291 - Disable core dumps in test_bt.sh, to avoid failures in "make
9292 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9294 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9295 - When running make test-network-all, use the mixed+hs-v2 network.
9296 (A previous fix to chutney removed v3 onion services from the
9297 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9298 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9299 - Before running make test-network-all, delete old logs and test
9300 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9303 o Minor bugfixes (testing, openssl compatibility):
9304 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
9305 internals. Previously, it relied on unsupported OpenSSL behavior in
9306 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
9307 bugfix on 0.2.5.1-alpha.
9309 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9310 - Our "tortls/cert_matches_key" unit test no longer relies on
9311 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9312 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9313 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9315 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9316 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9317 27185; bugfix on 0.2.2.2-alpha.
9320 Changes in version 0.3.3.10 - 2018-09-10
9321 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
9323 o Minor features (bug workaround, backport from 0.3.4.7-rc):
9324 - Compile correctly on systems that provide the C11 stdatomic.h
9325 header, but where C11 atomic functions don't actually compile.
9326 Closes ticket 26779; workaround for Debian issue 903709.
9328 o Minor features (compatibility, backport from 0.3.4.8):
9329 - Tell OpenSSL to maintain backward compatibility with previous
9330 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
9331 ciphers are disabled by default. Closes ticket 27344.
9333 o Minor features (continuous integration, backport from 0.3.4.7-rc):
9334 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9335 - Enable macOS builds in our Travis CI configuration. Closes
9337 - Install libcap-dev and libseccomp2-dev so these optional
9338 dependencies get tested on Travis CI. Closes ticket 26560.
9339 - Run asciidoc during Travis CI. Implements ticket 27087.
9340 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9342 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
9343 - Use cargo cache in our Travis CI configuration. Closes
9346 o Minor features (controller, backport from 0.3.4.6-rc):
9347 - The control port now exposes the list of HTTPTunnelPorts and
9348 ExtOrPorts via GETINFO net/listeners/httptunnel and
9349 net/listeners/extor respectively. Closes ticket 26647.
9351 o Minor features (directory authorities, backport from 0.3.4.7-rc):
9352 - Authorities no longer vote to make the subprotocol version
9353 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9354 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9356 o Minor features (geoip):
9357 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9358 Country database. Closes ticket 27089.
9360 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
9361 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9362 tell the compiler not to include the system malloc implementation.
9363 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9364 - Don't try to use a pragma to temporarily disable the
9365 -Wunused-const-variable warning if the compiler doesn't support
9366 it. Fixes bug 26785; bugfix on 0.3.2.11.
9368 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
9369 - Silence a spurious compiler warning on the GetAdaptersAddresses
9370 function pointer cast. This issue is already fixed by 26481 in
9371 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9372 bugfix on 0.2.3.11-alpha.
9373 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9374 supported, and always fails. Some compilers warn about the
9375 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9378 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
9379 - Don't link or search for pthreads when building for Windows, even
9380 if we are using build environment (like mingw) that provides a
9381 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9383 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
9384 - Skip a pair of unreliable key generation tests on Windows, until
9385 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9386 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9388 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
9389 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9390 - Pass the module flags to distcheck configure, and log the flags
9391 before running configure. (Backported to 0.2.9 and later as a
9392 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9394 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
9395 - When a Travis build fails, and showing a log fails, keep trying to
9396 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9397 - When we use echo in Travis, don't pass a --flag as the first
9398 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9400 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
9401 - When voting for recommended versions, make sure that all of the
9402 versions are well-formed and parsable. Fixes bug 26485; bugfix
9405 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
9406 - Always call tor_free_all() when leaving tor_run_main(). When we
9407 did not, restarting tor in-process would cause an assertion
9408 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9410 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
9411 - Fix a bug in our sandboxing rules for the openat() syscall.
9412 Previously, no openat() call would be permitted, which would break
9413 filesystem operations on recent glibc versions. Fixes bug 25440;
9414 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9416 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
9417 - Improve the log message when connection initiators fail to
9418 authenticate direct connections to relays. Fixes bug 26927; bugfix
9421 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
9422 - Fix bug that causes services to not ever rotate their descriptors
9423 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9426 o Minor bugfixes (onion services, backport from 0.3.4.8):
9427 - Silence a spurious compiler warning in
9428 rend_client_send_introduction(). Fixes bug 27463; bugfix
9431 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
9432 - Work around two different bugs in the OS X 10.10 and later SDKs
9433 that would prevent us from successfully targeting earlier versions
9434 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
9436 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
9437 - Fix compilation of the unit tests on GNU/Hurd, which does not
9438 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9441 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
9442 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9444 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9445 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9446 - Protover parsing was accepting the presence of whitespace in
9447 version strings, which the C implementation would choke on, e.g.
9448 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9449 - Protover parsing was ignoring a 2nd hyphen and everything after
9450 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9452 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9453 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9454 - cd to ${abs_top_builddir}/src/rust before running cargo in
9455 src/test/test_rust.sh. This makes the working directory consistent
9456 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9458 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
9459 - Log a protocol warning when single onion services or Tor2web clients
9460 fail to authenticate direct connections to relays.
9461 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
9463 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
9464 - Disable core dumps in test_bt.sh, to avoid failures in "make
9465 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9467 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
9468 - When running make test-network-all, use the mixed+hs-v2 network.
9469 (A previous fix to chutney removed v3 onion services from the
9470 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9471 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9472 - Before running make test-network-all, delete old logs and test
9473 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9476 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
9477 - Our "tortls/cert_matches_key" unit test no longer relies on
9478 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9479 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9480 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9482 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
9483 - Stop sending ed25519 link specifiers in v3 onion service introduce
9484 cells and descriptors, when the rendezvous or introduction point
9485 doesn't support ed25519 link authentication. Fixes bug 26627;
9486 bugfix on 0.3.2.4-alpha.
9488 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
9489 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9490 27185; bugfix on 0.2.2.2-alpha.
9493 Changes in version 0.3.4.8 - 2018-09-10
9494 Tor 0.3.4.8 is the first stable release in its series; it includes
9495 compilation and portability fixes.
9497 The Tor 0.3.4 series includes improvements for running Tor in
9498 low-power and embedded environments, which should help performance in
9499 general. We've begun work on better modularity, and included preliminary
9500 changes on the directory authority side to accommodate a new bandwidth
9501 measurement system. We've also integrated more continuous-integration
9502 systems into our development process, and made corresponding changes to
9503 Tor's testing infrastructure. Finally, we've continued to refine
9504 our anti-denial-of-service code.
9506 Below are the changes since 0.3.4.7-rc. For a complete list of changes
9507 since 0.3.3.9, see the ReleaseNotes file.
9509 o Minor features (compatibility):
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):
9515 - Log the compiler path and version during Appveyor builds.
9516 Implements ticket 27449.
9517 - Show config.log and test-suite.log after failed Appveyor builds.
9518 Also upload the zipped full logs as a build artifact. Implements
9521 o Minor bugfixes (compilation):
9522 - Silence a spurious compiler warning on the GetAdaptersAddresses
9523 function pointer cast. This issue is already fixed by 26481 in
9524 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
9525 bugfix on 0.2.3.11-alpha.
9526 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
9527 supported, and always fails. Some compilers warn about the
9528 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
9531 o Minor bugfixes (continuous integration):
9532 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
9533 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
9534 Executables compiled for 64-bit Windows with this version of gcc
9535 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
9536 27460; bugfix on 0.3.4.1-alpha.
9537 - When a Travis build fails, and showing a log fails, keep trying to
9538 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
9539 - When we use echo in Travis, don't pass a --flag as the first
9540 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
9542 o Minor bugfixes (onion services):
9543 - Silence a spurious compiler warning in
9544 rend_client_send_introduction(). Fixes bug 27463; bugfix
9547 o Minor bugfixes (testing, chutney):
9548 - When running make test-network-all, use the mixed+hs-v2 network.
9549 (A previous fix to chutney removed v3 onion services from the
9550 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
9551 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
9552 - Before running make test-network-all, delete old logs and test
9553 result files, to avoid spurious failures. Fixes bug 27295; bugfix
9556 Changes in version 0.3.4.7-rc - 2018-08-24
9557 Tor 0.3.4.7-rc fixes several small compilation, portability, and
9558 correctness issues in previous versions of Tor. This version is a
9559 release candidate: if no serious bugs are found, we expect that the
9560 stable 0.3.4 release will be (almost) the same as this release.
9562 o Minor features (bug workaround):
9563 - Compile correctly on systems that provide the C11 stdatomic.h
9564 header, but where C11 atomic functions don't actually compile.
9565 Closes ticket 26779; workaround for Debian issue 903709.
9567 o Minor features (continuous integration):
9568 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
9569 - Enable macOS builds in our Travis CI configuration. Closes
9571 - Install libcap-dev and libseccomp2-dev so these optional
9572 dependencies get tested on Travis CI. Closes ticket 26560.
9573 - Only post Appveyor IRC notifications when the build fails.
9574 Implements ticket 27275.
9575 - Run asciidoc during Travis CI. Implements ticket 27087.
9576 - Use ccache in our Travis CI configuration. Closes ticket 26952.
9578 o Minor features (continuous integration, rust):
9579 - Use cargo cache in our Travis CI configuration. Closes
9582 o Minor features (directory authorities):
9583 - Authorities no longer vote to make the subprotocol version
9584 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
9585 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
9587 o Minor features (geoip):
9588 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
9589 Country database. Closes ticket 27089.
9591 o Minor bugfixes (compilation, windows):
9592 - Don't link or search for pthreads when building for Windows, even
9593 if we are using build environment (like mingw) that provides a
9594 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
9596 o Minor bugfixes (continuous integration):
9597 - Improve Appveyor CI IRC logging. Generate correct branches and
9598 URLs for pull requests and tags. Use unambiguous short commits.
9599 Fixes bug 26979; bugfix on master.
9600 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
9601 - Pass the module flags to distcheck configure, and log the flags
9602 before running configure. (Backported to 0.2.9 and later as a
9603 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
9605 o Minor bugfixes (in-process restart):
9606 - Always call tor_free_all() when leaving tor_run_main(). When we
9607 did not, restarting tor in-process would cause an assertion
9608 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
9610 o Minor bugfixes (linux seccomp2 sandbox):
9611 - Fix a bug in out sandboxing rules for the openat() syscall.
9612 Previously, no openat() call would be permitted, which would break
9613 filesystem operations on recent glibc versions. Fixes bug 25440;
9614 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
9616 o Minor bugfixes (onion services):
9617 - Fix bug that causes services to not ever rotate their descriptors
9618 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
9621 o Minor bugfixes (portability):
9622 - Fix compilation of the unit tests on GNU/Hurd, which does not
9623 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
9626 o Minor bugfixes (rust):
9627 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
9629 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
9630 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
9631 - Protover parsing was accepting the presence of whitespace in
9632 version strings, which the C implementation would choke on, e.g.
9633 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
9634 - Protover parsing was ignoring a 2nd hyphen and everything after
9635 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
9637 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
9638 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
9639 - cd to ${abs_top_builddir}/src/rust before running cargo in
9640 src/test/test_rust.sh. This makes the working directory consistent
9641 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
9643 o Minor bugfixes (testing, bootstrap):
9644 - When calculating bootstrap progress, check exit policies and the
9645 exit flag. Previously, Tor would only check the exit flag, which
9646 caused race conditions in small and fast networks like chutney.
9647 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
9649 o Minor bugfixes (testing, openssl compatibility):
9650 - Our "tortls/cert_matches_key" unit test no longer relies on
9651 OpenSSL internals. Previously, it relied on unsupported OpenSSL
9652 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
9653 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
9655 o Minor bugfixes (Windows, compilation):
9656 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
9657 27185; bugfix on 0.2.2.2-alpha.
9660 Changes in version 0.3.4.6-rc - 2018-08-06
9661 Tor 0.3.4.6-rc fixes several small compilation, portability, and
9662 correctness issues in previous versions of Tor. This version is a
9663 release candidate: if no serious bugs are found, we expect that the
9664 stable 0.3.4 release will be (almost) the same as this release.
9666 o Major bugfixes (event scheduler):
9667 - When we enable a periodic event, schedule it in the event loop
9668 rather than running it immediately. Previously, we would re-run
9669 periodic events immediately in the middle of (for example)
9670 changing our options, with unpredictable effects. Fixes bug 27003;
9671 bugfix on 0.3.4.1-alpha.
9673 o Minor features (compilation):
9674 - When building Tor, prefer to use Python 3 over Python 2, and more
9675 recent (contemplated) versions over older ones. Closes
9677 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
9678 tell the compiler not to include the system malloc implementation.
9679 Fixes bug 20424; bugfix on 0.2.0.20-rc.
9680 - Don't try to use a pragma to temporarily disable the
9681 -Wunused-const-variable warning if the compiler doesn't support
9682 it. Fixes bug 26785; bugfix on 0.3.2.11.
9684 o Minor bugfixes (continuous integration):
9685 - Skip a pair of unreliable key generation tests on Windows, until
9686 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
9687 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
9689 o Minor features (controller):
9690 - The control port now exposes the list of HTTPTunnelPorts and
9691 ExtOrPorts via GETINFO net/listeners/httptunnel and
9692 net/listeners/extor respectively. Closes ticket 26647.
9694 o Minor bugfixes (directory authority):
9695 - When voting for recommended versions, make sure that all of the
9696 versions are well-formed and parsable. Fixes bug 26485; bugfix
9699 o Minor features (geoip):
9700 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9701 Country database. Closes ticket 26674.
9703 o Minor features (Rust, portability):
9704 - Rust cross-compilation is now supported. Closes ticket 25895.
9706 o Minor bugfixes (compilation):
9707 - Update build system so that tor builds again with --disable-unittests
9708 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
9709 - Fix a compilation warning on some versions of GCC when building
9710 code that calls routerinfo_get_my_routerinfo() twice, assuming
9711 that the second call will succeed if the first one did. Fixes bug
9712 26269; bugfix on 0.2.8.2-alpha.
9714 o Minor bugfixes (controller):
9715 - Report the port correctly when a port is configured to bind to
9716 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
9717 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
9718 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
9719 on 0.3.3.1-alpha. Patch by "akwizgran".
9721 o Minor bugfixes (correctness, flow control):
9722 - Upon receiving a stream-level SENDME cell, verify that our window
9723 has not grown too large. Fixes bug 26214; bugfix on svn
9726 o Minor bugfixes (memory, correctness):
9727 - Fix a number of small memory leaks identified by coverity. Fixes
9728 bug 26467; bugfix on numerous Tor versions.
9730 o Minor bugfixes (logging):
9731 - Improve the log message when connection initiators fail to
9732 authenticate direct connections to relays. Fixes bug 26927; bugfix
9735 o Minor bugfixes (portability):
9736 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
9737 26994; bugfix on 0.3.4.1-alpha.
9738 - Work around two different bugs in the OS X 10.10 and later SDKs
9739 that would prevent us from successfully targeting earlier versions
9740 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
9742 o Minor bugfixes (single onion services, Tor2web):
9743 - Log a protocol warning when single onion services or Tor2web
9744 clients fail to authenticate direct connections to relays. Fixes
9745 bug 26924; bugfix on 0.2.9.1-alpha.
9747 o Minor bugfixes (testing):
9748 - Disable core dumps in test_bt.sh, to avoid failures in "make
9749 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
9751 o Minor bugfixes (testing, compatibility):
9752 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
9753 only to pass strings (rather than "bytes" objects) to the Python
9754 subprocess module. Python 3 on Windows seems to require this.
9755 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
9756 0.3.1.1-alpha (for hs_ntor_ref.py).
9758 o Minor bugfixes (v3 onion services):
9759 - Stop sending ed25519 link specifiers in v3 onion service introduce
9760 cells and descriptors, when the rendezvous or introduction point
9761 doesn't support ed25519 link authentication. Fixes bug 26627;
9762 bugfix on 0.3.2.4-alpha.
9765 Changes in version 0.3.4.5-rc - 2018-07-13
9766 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
9767 bridge relays should upgrade.
9769 o Directory authority changes:
9770 - The "Bifroest" bridge authority has been retired; the new bridge
9771 authority is "Serge", and it is operated by George from the
9772 TorBSD project. Closes ticket 26771.
9775 Changes in version 0.3.3.9 - 2018-07-13
9776 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
9777 bridge relays should upgrade.
9779 o Directory authority changes:
9780 - The "Bifroest" bridge authority has been retired; the new bridge
9781 authority is "Serge", and it is operated by George from the
9782 TorBSD project. Closes ticket 26771.
9785 Changes in version 0.3.2.11 - 2018-07-13
9786 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
9787 bridge relays should upgrade. We also take this opportunity to backport
9790 o Directory authority changes:
9791 - The "Bifroest" bridge authority has been retired; the new bridge
9792 authority is "Serge", and it is operated by George from the
9793 TorBSD project. Closes ticket 26771.
9795 o Directory authority changes (backport from 0.3.3.7):
9796 - Add an IPv6 address for the "dannenberg" directory authority.
9797 Closes ticket 26343.
9799 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9800 - When directory authorities read a zero-byte bandwidth file, they
9801 would previously log a warning with the contents of an
9802 uninitialised buffer. They now log a warning about the empty file
9803 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9805 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
9806 - Correctly detect when onion services get disabled after HUP. Fixes
9807 bug 25761; bugfix on 0.3.2.1.
9809 o Minor features (sandbox, backport from 0.3.3.4-alpha):
9810 - Explicitly permit the poll() system call when the Linux
9811 seccomp2-based sandbox is enabled: apparently, some versions of
9812 libc use poll() when calling getpwnam(). Closes ticket 25313.
9814 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
9815 - Update the Travis CI configuration to use the stable Rust channel,
9816 now that we have decided to require that. Closes ticket 25714.
9818 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9819 - Our .travis.yml configuration now includes support for testing the
9820 results of "make distcheck". (It's not uncommon for "make check"
9821 to pass but "make distcheck" to fail.) Closes ticket 25814.
9822 - Our Travis CI configuration now integrates with the Coveralls
9823 coverage analysis tool. Closes ticket 25818.
9825 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
9826 - Add several checks to detect whether Tor relays are uploading
9827 their descriptors without specifying why they regenerated them.
9828 Diagnostic for ticket 25686.
9830 o Minor features (compilation, backport from 0.3.4.4-rc):
9831 - When building Tor, prefer to use Python 3 over Python 2, and more
9832 recent (contemplated) versions over older ones. Closes
9835 o Minor features (geoip):
9836 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9837 Country database. Closes ticket 26674.
9839 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9840 - Upon receiving a malformed connected cell, stop processing the
9841 cell immediately. Previously we would mark the connection for
9842 close, but continue processing the cell as if the connection were
9843 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9845 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9846 - Allow the nanosleep() system call, which glibc uses to implement
9847 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9849 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9850 - When running the hs_ntor_ref.py test, make sure only to pass
9851 strings (rather than "bytes" objects) to the Python subprocess
9852 module. Python 3 on Windows seems to require this. Fixes bug
9853 26535; bugfix on 0.3.1.1-alpha.
9854 - When running the ntor_ref.py test, make sure only to pass strings
9855 (rather than "bytes" objects) to the Python subprocess module.
9856 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9859 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9860 - Work around a change in OpenSSL 1.1.1 where return values that
9861 would previously indicate "no password" now indicate an empty
9862 password. Without this workaround, Tor instances running with
9863 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9864 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9866 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
9867 - Document that the PerConnBW{Rate,Burst} options will fall back to
9868 their corresponding consensus parameters only if those parameters
9869 are set. Previously we had claimed that these values would always
9870 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
9872 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9873 - Fix a compilation warning on some versions of GCC when building
9874 code that calls routerinfo_get_my_routerinfo() twice, assuming
9875 that the second call will succeed if the first one did. Fixes bug
9876 26269; bugfix on 0.2.8.2-alpha.
9878 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9879 - Don't consider Tor running as a client if the ControlPort is open,
9880 but no actual client ports are open. Fixes bug 26062; bugfix
9883 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9884 - Prevent a possible out-of-bounds smartlist read in
9885 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9887 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
9888 - Fix a very unlikely (impossible, we believe) null pointer
9889 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
9890 Coverity; this is CID 1430932.
9892 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
9893 - Fix a memory leak when a v3 onion service is configured and gets a
9894 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9895 - When parsing the descriptor signature, look for the token plus an
9896 extra white-space at the end. This is more correct but also will
9897 allow us to support new fields that might start with "signature".
9898 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9900 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
9901 - Relays now correctly block attempts to re-extend to the previous
9902 relay by Ed25519 identity. Previously they would warn in this
9903 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9906 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
9907 - Avoid a crash when running with DirPort set but ORPort turned off.
9908 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9910 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
9911 - Silence unused-const-variable warnings in zstd.h with some GCC
9912 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9914 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
9915 - Avoid intermittent test failures due to a test that had relied on
9916 onion service introduction point creation finishing within 5
9917 seconds of real clock time. Fixes bug 25450; bugfix
9920 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
9921 - Fix a C99 compliance issue in our configuration script that caused
9922 compilation issues when compiling Tor with certain versions of
9923 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
9925 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9926 - Fix a number of small memory leaks identified by coverity. Fixes
9927 bug 26467; bugfix on numerous Tor versions.
9929 o Code simplification and refactoring (backport from 0.3.3.5-rc):
9930 - Move the list of default directory authorities to its own file.
9931 Closes ticket 24854. Patch by "beastr0".
9934 Changes in version 0.2.9.16 - 2018-07-13
9935 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
9936 bridge relays should upgrade. We also take this opportunity to backport
9939 o Directory authority changes:
9940 - The "Bifroest" bridge authority has been retired; the new bridge
9941 authority is "Serge", and it is operated by George from the
9942 TorBSD project. Closes ticket 26771.
9944 o Directory authority changes (backport from 0.3.3.7):
9945 - Add an IPv6 address for the "dannenberg" directory authority.
9946 Closes ticket 26343.
9948 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9949 - When directory authorities read a zero-byte bandwidth file, they
9950 would previously log a warning with the contents of an
9951 uninitialised buffer. They now log a warning about the empty file
9952 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9954 o Minor features (sandbox, backport from 0.3.3.4-alpha):
9955 - Explicitly permit the poll() system call when the Linux
9956 seccomp2-based sandbox is enabled: apparently, some versions of
9957 libc use poll() when calling getpwnam(). Closes ticket 25313.
9959 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9960 - Our .travis.yml configuration now includes support for testing the
9961 results of "make distcheck". (It's not uncommon for "make check"
9962 to pass but "make distcheck" to fail.) Closes ticket 25814.
9963 - Our Travis CI configuration now integrates with the Coveralls
9964 coverage analysis tool. Closes ticket 25818.
9966 o Minor features (compilation, backport from 0.3.4.4-rc):
9967 - When building Tor, prefer to use Python 3 over Python 2, and more
9968 recent (contemplated) versions over older ones. Closes
9971 o Minor features (geoip):
9972 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9973 Country database. Closes ticket 26674.
9975 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9976 - Upon receiving a malformed connected cell, stop processing the
9977 cell immediately. Previously we would mark the connection for
9978 close, but continue processing the cell as if the connection were
9979 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9981 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9982 - Allow the nanosleep() system call, which glibc uses to implement
9983 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9985 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9986 - When running the ntor_ref.py test, make sure only to pass strings
9987 (rather than "bytes" objects) to the Python subprocess module.
9988 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9991 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9992 - Work around a change in OpenSSL 1.1.1 where return values that
9993 would previously indicate "no password" now indicate an empty
9994 password. Without this workaround, Tor instances running with
9995 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9996 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9998 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9999 - Fix a compilation warning on some versions of GCC when building
10000 code that calls routerinfo_get_my_routerinfo() twice, assuming
10001 that the second call will succeed if the first one did. Fixes bug
10002 26269; bugfix on 0.2.8.2-alpha.
10004 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10005 - Don't consider Tor running as a client if the ControlPort is open,
10006 but no actual client ports are open. Fixes bug 26062; bugfix
10009 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10010 - Prevent a possible out-of-bounds smartlist read in
10011 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10013 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
10014 - Fix a very unlikely (impossible, we believe) null pointer
10015 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10016 Coverity; this is CID 1430932.
10018 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10019 - Fix a number of small memory leaks identified by coverity. Fixes
10020 bug 26467; bugfix on numerous Tor versions.
10022 o Code simplification and refactoring (backport from 0.3.3.5-rc):
10023 - Move the list of default directory authorities to its own file.
10024 Closes ticket 24854. Patch by "beastr0".
10027 Changes in version 0.3.4.4-rc - 2018-07-09
10028 Tor 0.3.4.4-rc fixes several small compilation, portability, and
10029 correctness issues in previous versions of Tor. This version is a
10030 release candidate: if no serious bugs are found, we expect that the
10031 stable 0.3.4 release will be (almost) the same as this release.
10033 o Minor features (compilation):
10034 - When building Tor, prefer to use Python 3 over Python 2, and more
10035 recent (contemplated) versions over older ones. Closes
10038 o Minor features (geoip):
10039 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10040 Country database. Closes ticket 26674.
10042 o Minor features (Rust, portability):
10043 - Rust cross-compilation is now supported. Closes ticket 25895.
10045 o Minor bugfixes (compilation):
10046 - Fix a compilation warning on some versions of GCC when building
10047 code that calls routerinfo_get_my_routerinfo() twice, assuming
10048 that the second call will succeed if the first one did. Fixes bug
10049 26269; bugfix on 0.2.8.2-alpha.
10051 o Minor bugfixes (control port):
10052 - Report the port correctly when a port is configured to bind to
10053 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
10054 - Handle the HSADDRESS= argument to the HSPOST command properly.
10055 (Previously, this argument was misparsed and thus ignored.) Fixes
10056 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10058 o Minor bugfixes (correctness, flow control):
10059 - Upon receiving a stream-level SENDME cell, verify that our window
10060 has not grown too large. Fixes bug 26214; bugfix on svn
10063 o Minor bugfixes (memory, correctness):
10064 - Fix a number of small memory leaks identified by coverity. Fixes
10065 bug 26467; bugfix on numerous Tor versions.
10067 o Minor bugfixes (testing, compatibility):
10068 - When running the hs_ntor_ref.py test, make sure only to pass
10069 strings (rather than "bytes" objects) to the Python subprocess
10070 module. Python 3 on Windows seems to require this. Fixes bug
10071 26535; bugfix on 0.3.1.1-alpha.
10072 - When running the ntor_ref.py test, make sure only to pass strings
10073 (rather than "bytes" objects) to the Python subprocess module.
10074 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10078 Changes in version 0.3.3.8 - 2018-07-09
10079 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
10080 fixes for a memory leak affecting directory authorities.
10082 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
10083 - Stop leaking memory on directory authorities when planning to
10084 vote. This bug was crashing authorities by exhausting their
10085 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10087 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
10088 - Make sure that failing tests in Rust will actually cause the build
10089 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10092 o Minor features (compilation, backport from 0.3.4.4-rc):
10093 - When building Tor, prefer to use Python 3 over Python 2, and more
10094 recent (contemplated) versions over older ones. Closes
10097 o Minor features (geoip):
10098 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
10099 Country database. Closes ticket 26674.
10101 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
10102 - Add several checks to detect whether Tor relays are uploading
10103 their descriptors without specifying why they regenerated them.
10104 Diagnostic for ticket 25686.
10106 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
10107 - Don't count path selection failures as circuit build failures.
10108 This change should eliminate cases where Tor blames its guard or
10109 the network for situations like insufficient microdescriptors
10110 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10113 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
10114 - Fix a compilation warning on some versions of GCC when building
10115 code that calls routerinfo_get_my_routerinfo() twice, assuming
10116 that the second call will succeed if the first one did. Fixes bug
10117 26269; bugfix on 0.2.8.2-alpha.
10119 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
10120 - Handle the HSADDRESS= argument to the HSPOST command properly.
10121 (Previously, this argument was misparsed and thus ignored.) Fixes
10122 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
10124 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
10125 - Fix a number of small memory leaks identified by coverity. Fixes
10126 bug 26467; bugfix on numerous Tor versions.
10128 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
10129 - Relays now correctly block attempts to re-extend to the previous
10130 relay by Ed25519 identity. Previously they would warn in this
10131 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10134 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
10135 - When shutting down, Tor now clears all the flags in the control.c
10136 module. This should prevent a bug where authentication cookies are
10137 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10139 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
10140 - When running the hs_ntor_ref.py test, make sure only to pass
10141 strings (rather than "bytes" objects) to the Python subprocess
10142 module. Python 3 on Windows seems to require this. Fixes bug
10143 26535; bugfix on 0.3.1.1-alpha.
10144 - When running the ntor_ref.py test, make sure only to pass strings
10145 (rather than "bytes" objects) to the Python subprocess module.
10146 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
10150 Changes in version 0.3.4.3-alpha - 2018-06-26
10151 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
10152 one that was causing stability issues on directory authorities.
10154 o Major bugfixes (directory authority):
10155 - Stop leaking memory on directory authorities when planning to
10156 vote. This bug was crashing authorities by exhausting their
10157 memory. Fixes bug 26435; bugfix on 0.3.3.6.
10159 o Major bugfixes (rust, testing):
10160 - Make sure that failing tests in Rust will actually cause the build
10161 to fail: previously, they were ignored. Fixes bug 26258; bugfix
10164 o Minor feature (directory authorities):
10165 - Stop warning about incomplete bw lines before the first complete
10166 bw line has been found, so that additional header lines can be
10167 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
10169 o Minor features (relay, diagnostic):
10170 - Add several checks to detect whether Tor relays are uploading
10171 their descriptors without specifying why they regenerated them.
10172 Diagnostic for ticket 25686.
10174 o Minor features (unit tests):
10175 - Test complete bandwidth measurements files, and test that
10176 incomplete bandwidth lines only give warnings when the end of the
10177 header has not been detected. Fixes bug 25947; bugfix
10180 o Minor bugfixes (compilation):
10181 - Refrain from compiling unit testing related object files when
10182 --disable-unittests is set to configure script. Fixes bug 24891;
10183 bugfix on 0.2.5.1-alpha.
10184 - When linking the libtor_testing.a library, only include the
10185 dirauth object files once. Previously, they were getting added
10186 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
10187 - The --enable-fatal-warnings flag now affects Rust code as well.
10188 Closes ticket 26245.
10190 o Minor bugfixes (onion services):
10191 - Recompute some consensus information after detecting a clock jump,
10192 or after transitioning from a non-live consensus to a live
10193 consensus. We do this to avoid having an outdated state, and
10194 miscalculating the index for next-generation onion services. Fixes
10195 bug 24977; bugfix on 0.3.2.1-alpha.
10197 o Minor bugfixes (relay):
10198 - Relays now correctly block attempts to re-extend to the previous
10199 relay by Ed25519 identity. Previously they would warn in this
10200 case, but not actually reject the attempt. Fixes bug 26158; bugfix
10203 o Minor bugfixes (testing):
10204 - Fix compilation of the doctests in the Rust crypto crate. Fixes
10205 bug 26415; bugfix on 0.3.4.1-alpha.
10206 - Instead of trying to read the geoip configuration files from
10207 within the unit tests, instead create our own ersatz files with
10208 just enough geoip data in the format we expect. Trying to read
10209 from the source directory created problems on Windows with mingw,
10210 where the build system's paths are not the same as the platform's
10211 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
10212 - Refrain from trying to get an item from an empty smartlist in
10213 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
10214 to catch improper smartlist usage. Furthermore, enable
10215 DEBUG_SMARTLIST globally when build is configured with fragile
10216 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
10219 Changes in version 0.3.3.7 - 2018-06-12
10220 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
10221 fixes for bugs affecting compatibility and stability.
10223 o Directory authority changes:
10224 - Add an IPv6 address for the "dannenberg" directory authority.
10225 Closes ticket 26343.
10227 o Minor features (geoip):
10228 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10229 Country database. Closes ticket 26351.
10231 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
10232 - Work around a change in OpenSSL 1.1.1 where return values that
10233 would previously indicate "no password" now indicate an empty
10234 password. Without this workaround, Tor instances running with
10235 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10236 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10238 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
10239 - Silence unused-const-variable warnings in zstd.h with some GCC
10240 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10242 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
10243 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10244 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10245 miscounting the total number of circuits for these field values.)
10246 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10248 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
10249 - Prevent a possible out-of-bounds smartlist read in
10250 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10252 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
10253 - Only select relays when they have the descriptors we prefer to use
10254 for them. This change fixes a bug where we could select a relay
10255 because it had _some_ descriptor, but reject it later with a
10256 nonfatal assertion error because it didn't have the exact one we
10257 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10260 Changes in version 0.3.4.2-alpha - 2018-06-12
10261 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
10262 release, and forward-ports an authority-only security fix from 0.3.3.6.
10264 o Directory authority changes:
10265 - Add an IPv6 address for the "dannenberg" directory authority.
10266 Closes ticket 26343.
10268 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
10269 - Fix a bug that could have allowed an attacker to force a directory
10270 authority to use up all its RAM by passing it a maliciously
10271 crafted protocol versions string. Fixes bug 25517; bugfix on
10272 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10274 o Minor features (continuous integration):
10275 - Add the necessary configuration files for continuous integration
10276 testing on Windows, via the Appveyor platform. Closes ticket
10277 25549. Patches from Marcin Cieślak and Isis Lovecruft.
10279 o Minor features (geoip):
10280 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
10281 Country database. Closes ticket 26351.
10283 o Minor bugfixes (compatibility, openssl):
10284 - Work around a change in OpenSSL 1.1.1 where return values that
10285 would previously indicate "no password" now indicate an empty
10286 password. Without this workaround, Tor instances running with
10287 OpenSSL 1.1.1 would accept descriptors that other Tor instances
10288 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
10290 o Minor bugfixes (compilation):
10291 - Silence unused-const-variable warnings in zstd.h with some GCC
10292 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
10293 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
10294 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
10295 - Avoid a compiler warning when casting the return value of
10296 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
10297 26283; bugfix on 0.2.4.10-alpha.
10299 o Minor bugfixes (control port):
10300 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
10301 CIRC_BW events. Previously, such cells were counted entirely in
10302 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
10305 o Minor bugfixes (controller):
10306 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
10307 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
10308 miscounting the total number of circuits for these field values.)
10309 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
10311 o Minor bugfixes (hardening):
10312 - Prevent a possible out-of-bounds smartlist read in
10313 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
10315 o Minor bugfixes (onion services):
10316 - Fix a bug that blocked the creation of ephemeral v3 onion
10317 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
10319 o Minor bugfixes (test coverage tools):
10320 - Update our "cov-diff" script to handle output from the latest
10321 version of gcov, and to remove extraneous timestamp information
10322 from its output. Fixes bugs 26101 and 26102; bugfix
10326 Changes in version 0.3.3.6 - 2018-05-22
10327 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
10328 backports several important fixes from the 0.3.4.1-alpha.
10330 The Tor 0.3.3 series includes controller support and other
10331 improvements for v3 onion services, official support for embedding Tor
10332 within other applications, and our first non-trivial module written in
10333 the Rust programming language. (Rust is still not enabled by default
10334 when building Tor.) And as usual, there are numerous other smaller
10335 bugfixes, features, and improvements.
10337 Below are the changes since 0.3.3.5-rc. For a list of all changes
10338 since 0.3.2.10, see the ReleaseNotes file.
10340 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
10341 - When directory authorities read a zero-byte bandwidth file, they
10342 would previously log a warning with the contents of an
10343 uninitialised buffer. They now log a warning about the empty file
10344 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10346 o Major bugfixes (security, directory authority, denial-of-service):
10347 - Fix a bug that could have allowed an attacker to force a directory
10348 authority to use up all its RAM by passing it a maliciously
10349 crafted protocol versions string. Fixes bug 25517; bugfix on
10350 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
10352 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
10353 - Avoid a rare assertion failure in the circuit build timeout code
10354 if we fail to allow any circuits to actually complete. Fixes bug
10355 25733; bugfix on 0.2.2.2-alpha.
10357 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
10358 - Avoid a crash when testing router reachability on a router that
10359 could have an ed25519 ID, but which does not. Fixes bug 25415;
10360 bugfix on 0.3.3.2-alpha.
10362 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
10363 - Correctly detect when onion services get disabled after HUP. Fixes
10364 bug 25761; bugfix on 0.3.2.1.
10366 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
10367 - Impose a limit on circuit cell queue size. The limit can be
10368 controlled by a consensus parameter. Fixes bug 25226; bugfix
10371 o Minor features (compatibility, backport from 0.3.4.1-alpha):
10372 - Avoid some compilation warnings with recent versions of LibreSSL.
10373 Closes ticket 26006.
10375 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
10376 - Our .travis.yml configuration now includes support for testing the
10377 results of "make distcheck". (It's not uncommon for "make check"
10378 to pass but "make distcheck" to fail.) Closes ticket 25814.
10379 - Our Travis CI configuration now integrates with the Coveralls
10380 coverage analysis tool. Closes ticket 25818.
10382 o Minor features (geoip):
10383 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10384 database. Closes ticket 26104.
10386 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
10387 - Don't consider Tor running as a client if the ControlPort is open,
10388 but no actual client ports are open. Fixes bug 26062; bugfix
10391 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
10392 - Upon receiving a malformed connected cell, stop processing the
10393 cell immediately. Previously we would mark the connection for
10394 close, but continue processing the cell as if the connection were
10395 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
10397 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
10398 - Stop saying in the manual that clients cache ipv4 dns answers from
10399 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10400 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
10401 we forgot to say so in the man page. Fixes bug 26052; bugfix
10404 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
10405 - Allow the nanosleep() system call, which glibc uses to implement
10406 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10408 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
10409 - Fix a memory leak when a v3 onion service is configured and gets a
10410 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10411 - When parsing the descriptor signature, look for the token plus an
10412 extra white-space at the end. This is more correct but also will
10413 allow us to support new fields that might start with "signature".
10414 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10416 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
10417 - Avoid a crash when running with DirPort set but ORPort turned off.
10418 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10420 o Documentation (backport from 0.3.4.1-alpha):
10421 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10422 ticket 25857. Patch from "CTassisF".
10425 Changes in version 0.3.4.1-alpha - 2018-05-17
10426 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
10427 includes refactoring to begin reducing Tor's binary size and idle CPU
10428 usage on mobile, along with prep work for new bandwidth scanners,
10429 improvements to the experimental "vanguards" feature, and numerous
10430 other small features and bugfixes.
10432 o New system requirements:
10433 - Tor no longer tries to support old operating systems without
10434 mmap() or some local equivalent. Apparently, compilation on such
10435 systems has been broken for some time, without anybody noticing or
10436 complaining. Closes ticket 25398.
10438 o Major feature (directory authority, modularization):
10439 - The directory authority subsystem has been modularized. The code
10440 is now located in src/or/dirauth/, and is compiled in by default.
10441 To disable the module, the configure option
10442 --disable-module-dirauth has been added. This module may be
10443 disabled by default in some future release. Closes ticket 25610.
10445 o Major features (main loop, CPU usage):
10446 - When Tor is disabled (via DisableNetwork or via hibernation), it
10447 no longer needs to run any per-second events. This change should
10448 make it easier for mobile applications to disable Tor while the
10449 device is sleeping, or Tor is not running. Closes ticket 26063.
10450 - Tor no longer enables all of its periodic events by default.
10451 Previously, Tor would enable all possible main loop events,
10452 regardless of whether it needed them. Furthermore, many of these
10453 events are now disabled with Tor is hibernating or DisableNetwork
10454 is set. This is a big step towards reducing client CPU usage by
10455 reducing the amount of wake-ups the daemon does. Closes ticket
10457 - The bandwidth-limitation logic has been refactored so that
10458 bandwidth calculations are performed on-demand, rather than every
10459 TokenBucketRefillInterval milliseconds. This change should improve
10460 the granularity of our bandwidth calculations, and limit the
10461 number of times that the Tor process needs to wake up when it is
10462 idle. Closes ticket 25373.
10463 - Move responsibility for many operations from a once-per-second
10464 callback to a callback that is only scheduled as needed. Moving
10465 this functionality has allowed us to disable the callback when
10466 Tor's network is disabled. Once enough items are removed from our
10467 once-per-second callback, we can eliminate it entirely to conserve
10468 CPU when idle. The functionality removed includes: closing
10469 connections, circuits, and channels (ticket 25932); consensus
10470 voting (25937); flushing log callbacks (25951); honoring delayed
10471 SIGNEWNYM requests (25949); rescanning the consensus cache
10472 (25931); saving the state file to disk (25948); warning relay
10473 operators about unreachable ports (25952); and keeping track of
10474 Tor's uptime (26009).
10476 o Major bugfixes (directory authorities, security):
10477 - When directory authorities read a zero-byte bandwidth file, they
10478 would previously log a warning with the contents of an
10479 uninitialised buffer. They now log a warning about the empty file
10480 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
10482 o Major bugfixes (crash):
10483 - Avoid a rare assertion failure in the circuit build timeout code
10484 if we fail to allow any circuits to actually complete. Fixes bug
10485 25733; bugfix on 0.2.2.2-alpha.
10487 o Major bugfixes (directory authority):
10488 - Avoid a crash when testing router reachability on a router that
10489 could have an ed25519 ID, but which does not. Fixes bug 25415;
10490 bugfix on 0.3.3.2-alpha.
10492 o Major bugfixes (onion service):
10493 - Correctly detect when onion services get disabled after HUP. Fixes
10494 bug 25761; bugfix on 0.3.2.1.
10496 o Major bugfixes (protover, voting):
10497 - Revise Rust implementation of protover to use a more memory-
10498 efficient voting algorithm and corresponding data structures, thus
10499 avoiding a potential (but small impact) DoS attack where specially
10500 crafted protocol strings would expand to several potential
10501 megabytes in memory. In the process, several portions of code were
10502 revised to be methods on new, custom types, rather than functions
10503 taking interchangeable types, thus increasing type safety of the
10504 module. Custom error types and handling were added as well, in
10505 order to facilitate better error dismissal/handling in outside
10506 crates and avoid mistakenly passing an internal error string to C
10507 over the FFI boundary. Many tests were added, and some previous
10508 differences between the C and Rust implementations have been
10509 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
10511 o Major bugfixes (relay, denial of service):
10512 - Impose a limit on circuit cell queue size. The limit can be
10513 controlled by a consensus parameter. Fixes bug 25226; bugfix
10516 o Minor features (accounting):
10517 - When Tor becomes dormant, it now uses a scheduled event to wake up
10518 at the right time. Previously, we would use the per-second timer
10519 to check whether to wake up, but we no longer have any per-second
10520 timers enabled when the network is disabled. Closes ticket 26064.
10522 o Minor features (code quality):
10523 - Add optional spell-checking for the Tor codebase, using the
10524 "misspell" program. To use this feature, run "make check-typos".
10525 Closes ticket 25024.
10527 o Minor features (compatibility):
10528 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
10529 the no-deprecated option, and builds correctly with them. Closes
10530 tickets 19429, 19981, and 25353.
10531 - Avoid some compilation warnings with recent versions of LibreSSL.
10532 Closes ticket 26006.
10534 o Minor features (compression, zstd):
10535 - When running with zstd, Tor now considers using advanced functions
10536 that the zstd maintainers have labeled as potentially unstable. To
10537 prevent breakage, Tor will only use this functionality when the
10538 runtime version of the zstd library matches the version with which
10539 Tor was compiled. Closes ticket 25162.
10541 o Minor features (configuration):
10542 - The "DownloadSchedule" options have been renamed to end with
10543 "DownloadInitialDelay". The old names are still allowed, but will
10544 produce a warning. Comma-separated lists are still permitted for
10545 these options, but all values after the first are ignored (as they
10546 have been since 0.2.9). Closes ticket 23354.
10548 o Minor features (continuous integration):
10549 - Our .travis.yml configuration now includes support for testing the
10550 results of "make distcheck". (It's not uncommon for "make check"
10551 to pass but "make distcheck" to fail.) Closes ticket 25814.
10552 - Our Travis CI configuration now integrates with the Coveralls
10553 coverage analysis tool. Closes ticket 25818.
10555 o Minor features (control port):
10556 - Introduce GETINFO "current-time/{local,utc}" to return the local
10557 and UTC times respectively in ISO format. This helps a controller
10558 like Tor Browser detect a time-related error. Closes ticket 25511.
10559 Patch by Neel Chauhan.
10560 - Introduce new fields to the CIRC_BW event. There are two new
10561 fields in each of the read and written directions. The DELIVERED
10562 fields report the total valid data on the circuit, as measured by
10563 the payload sizes of verified and error-checked relay command
10564 cells. The OVERHEAD fields report the total unused bytes in each
10565 of these cells. Closes ticket 25903.
10567 o Minor features (directory authority):
10568 - Directory authorities now open their key-pinning files as O_SYNC,
10569 to limit their chances of accidentally writing partial lines.
10570 Closes ticket 23909.
10572 o Minor features (directory authority, forward compatibility):
10573 - Make the lines of the measured bandwidth file able to contain
10574 their entries in any order. Previously, the node_id entry needed
10575 to come first. Closes ticket 26004.
10577 o Minor features (entry guards):
10578 - Introduce a new torrc option NumPrimaryGuards for controlling the
10579 number of primary guards. Closes ticket 25843.
10581 o Minor features (geoip):
10582 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
10583 database. Closes ticket 26104.
10585 o Minor features (performance):
10586 - Avoid a needless call to malloc() when processing an incoming
10587 relay cell. Closes ticket 24914.
10588 - Make our timing-wheel code run a tiny bit faster on 32-bit
10589 platforms, by preferring 32-bit math to 64-bit. Closes
10591 - Avoid a needless malloc()/free() pair every time we handle an ntor
10592 handshake. Closes ticket 25150.
10594 o Minor features (testing):
10595 - Add a unit test for voting_schedule_get_start_of_next_interval().
10596 Closes ticket 26014, and helps make unit test coverage
10597 more deterministic.
10598 - A new unittests module specifically for testing the functions in
10599 the (new-ish) bridges.c module has been created with new
10600 unittests, raising the code coverage percentages. Closes 25425.
10601 - We now have improved testing for addressmap_get_virtual_address()
10602 function. This should improve our test coverage, and make our test
10603 coverage more deterministic. Closes ticket 25993.
10605 o Minor features (timekeeping, circuit scheduling):
10606 - When keeping track of how busy each circuit have been recently on
10607 a given connection, use coarse-grained monotonic timers rather
10608 than gettimeofday(). This change should marginally increase
10609 accuracy and performance. Implements part of ticket 25927.
10611 o Minor bugfixes (bandwidth management):
10612 - Consider ourselves "low on write bandwidth" if we have exhausted
10613 our write bandwidth some time in the last second. This was the
10614 documented behavior before, but the actual behavior was to change
10615 this value every TokenBucketRefillInterval. Fixes bug 25828;
10616 bugfix on 0.2.3.5-alpha.
10618 o Minor bugfixes (C correctness):
10619 - Add a missing lock acquisition in the shutdown code of the control
10620 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
10621 Coverity; this is CID 1433643.
10623 o Minor bugfixes (circuit path selection):
10624 - Don't count path selection failures as circuit build failures.
10625 This change should eliminate cases where Tor blames its guard or
10626 the network for situations like insufficient microdescriptors
10627 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
10630 o Minor bugfixes (client):
10631 - Don't consider Tor running as a client if the ControlPort is open,
10632 but no actual client ports are open. Fixes bug 26062; bugfix
10635 o Minor bugfixes (code style):
10636 - Fixed multiple includes of transports.h in src/or/connection.c
10637 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
10638 - Remove the unused variable n_possible from the function
10639 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
10641 o Minor bugfixes (control interface):
10642 - Respond with more human-readable error messages to GETINFO exit-
10643 policy/* requests. Also, let controller know if an error is
10644 transient (response code 551) or not (response code 552). Fixes
10645 bug 25852; bugfix on 0.2.8.1-alpha.
10647 o Minor bugfixes (controller):
10648 - Make CIRC_BW event reflect the total of all data sent on a
10649 circuit, including padding and dropped cells. Also fix a mis-
10650 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
10651 bugfix on 0.2.5.2-alpha.
10653 o Minor bugfixes (correctness, client):
10654 - Upon receiving a malformed connected cell, stop processing the cell
10655 immediately. Previously we would mark the connection for close, but
10656 continue processing the cell as if the connection were open. Fixes bug
10657 26072; bugfix on 0.2.4.7-alpha.
10659 o Minor bugfixes (directory client):
10660 - When unverified-consensus is verified, rename it to cached-
10661 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
10662 - Fixed launching a certificate fetch always during the scheduled
10663 periodic consensus fetch by fetching only in those cases when
10664 consensus are waiting for certs. Fixes bug 24740; bugfix
10667 o Minor bugfixes (documentation):
10668 - Stop saying in the manual that clients cache ipv4 dns answers from
10669 exit relays. We haven't used them since 0.2.6.3-alpha, and in
10670 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
10671 we forgot to say so in the man page. Fixes bug 26052; bugfix
10674 o Minor bugfixes (error reporting):
10675 - Improve tolerance for directory authorities with skewed clocks.
10676 Previously, an authority with a clock more than 60 seconds ahead
10677 could cause a client with a correct clock to warn that the
10678 client's clock was behind. Now the clocks of a majority of
10679 directory authorities have to be ahead of the client before this
10680 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
10682 o Minor bugfixes (Linux seccomp2 sandbox):
10683 - Allow the nanosleep() system call, which glibc uses to implement
10684 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
10686 o Minor bugfixes (onion service):
10687 - Fix a memory leak when a v3 onion service is configured and gets a
10688 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
10689 - When parsing the descriptor signature, look for the token plus an
10690 extra white-space at the end. This is more correct but also will
10691 allow us to support new fields that might start with "signature".
10692 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
10694 o Minor bugfixes (path selection):
10695 - Only select relays when they have the descriptors we prefer to use
10696 for them. This change fixes a bug where we could select a relay
10697 because it had _some_ descriptor, but reject it later with a
10698 nonfatal assertion error because it didn't have the exact one we
10699 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
10701 o Minor bugfixes (portability):
10702 - Do not align mmap length, as it is not required by POSIX, and the
10703 getpagesize function is deprecated. Fixes bug 25399; bugfix
10706 o Minor bugfixes (portability, FreeBSD):
10707 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
10708 does not stringify on FreeBSD, so we switch to tor_asprintf().
10709 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
10711 o Minor bugfixes (relay statistics):
10712 - When a relay is collecting internal statistics about how many
10713 create cell requests it has seen of each type, accurately count
10714 the requests from relays that temporarily fall out of the
10715 consensus. (To be extra conservative, we were already ignoring
10716 requests from clients in our counts, and we continue ignoring them
10717 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
10719 o Minor bugfixes (relay, crash):
10720 - Avoid a crash when running with DirPort set but ORPort turned off.
10721 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
10723 o Minor bugfixes (restart-in-process):
10724 - When shutting down, Tor now clears all the flags in the control.c
10725 module. This should prevent a bug where authentication cookies are
10726 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
10728 o Minor bugfixes (testing):
10729 - When testing workqueue event-cancellation, make sure that we
10730 actually cancel an event, and that cancel each event with equal
10731 probability. (It was previously possible, though extremely
10732 unlikely, for our event-canceling test not to cancel any events.)
10733 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
10734 - Repeat part of the test in test_client_pick_intro() a number of
10735 times, to give it consistent coverage. Fixes bug 25996; bugfix
10737 - Remove randomness from the hs_common/responsible_hsdirs test, so
10738 that it always takes the same path through the function it tests.
10739 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
10740 - Change the behavior of the "channel/outbound" test so that it
10741 never causes a 10-second rollover for the EWMA circuitmux code.
10742 Previously, this behavior would happen randomly, and result in
10743 fluctuating test coverage. Fixes bug 25994; bugfix
10745 - Use X509_new() to allocate certificates that will be freed later
10746 with X509_free(). Previously, some parts of the unit tests had
10747 used tor_malloc_zero(), which is incorrect, and which caused test
10748 failures on Windows when they were built with extra hardening.
10749 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
10751 - While running the circuit_timeout test, fix the PRNG to a
10752 deterministic AES stream, so that the test coverage from this test
10753 will itself be deterministic. Fixes bug 25995; bugfix
10756 o Minor bugfixes (vanguards):
10757 - Allow the last hop in a vanguard circuit to be the same as our
10758 first, to prevent the adversary from influencing guard node choice
10759 by choice of last hop. Also prevent the creation of A - B - A
10760 paths, or A - A paths, which are forbidden by relays. Fixes bug
10761 25870; bugfix on 0.3.3.1-alpha.
10763 o Code simplification and refactoring:
10764 - Remove duplicate code in parse_{c,s}method_line and bootstrap
10765 their functionalities into a single function. Fixes bug 6236;
10766 bugfix on 0.2.3.6-alpha.
10767 - We remove the PortForwarding and PortForwardingHelper options,
10768 related functions, and the port_forwarding tests. These options
10769 were used by the now-deprecated Vidalia to help ordinary users
10770 become Tor relays or bridges. Closes ticket 25409. Patch by
10772 - In order to make the OR and dir checking function in router.c less
10773 confusing we renamed some functions and
10774 consider_testing_reachability() has been split into
10775 router_should_check_reachability() and
10776 router_do_reachability_checks(). Also we improved the documentation
10777 in some functions. Closes ticket 18918.
10778 - Initial work to isolate Libevent usage to a handful of modules in
10779 our codebase, to simplify our call structure, and so that we can
10780 more easily change event loops in the future if needed. Closes
10782 - Introduce a function to call getsockname() and return tor_addr_t,
10783 to save a little complexity throughout the codebase. Closes
10785 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
10786 as hsdir_index is always present. Also, we move hsdir_index_t into
10787 or.h. Closes ticket 23094. Patch by Neel Chauhan.
10788 - Merge functions used for describing nodes and suppress the
10789 functions that do not allocate memory for the output buffer
10790 string. NODE_DESC_BUF_LEN constant and format_node_description()
10791 function cannot be used externally from router.c module anymore.
10792 Closes ticket 25432. Patch by valentecaio.
10793 - Our main loop has been simplified so that all important operations
10794 happen inside events. Previously, some operations had to happen
10795 outside the event loop, to prevent infinite sequences of event
10796 activations. Closes ticket 25374.
10797 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
10798 it in register_intro_circ() and service_intro_point_new(). This
10799 prevents the digest from being re-calculated each time. Closes
10800 ticket 23107. Patch by Neel Chauhan.
10801 - Refactor token-bucket implementations to use a common backend.
10802 Closes ticket 25766.
10803 - Remove extern declaration of stats_n_seconds_working variable from
10804 main, protecting its accesses with get_uptime() and reset_uptime()
10805 functions. Closes ticket 25081, patch by “valentecaio”.
10806 - Remove our previous logic for "cached gettimeofday()" -- our
10807 coarse monotonic timers are fast enough for this purpose, and far
10808 less error-prone. Implements part of ticket 25927.
10809 - Remove the return value for fascist_firewall_choose_address_base(),
10810 and sister functions such as fascist_firewall_choose_address_node()
10811 and fascist_firewall_choose_address_rs(). Also, while we're here,
10812 initialize the ap argument as leaving it uninitialized can pose a
10813 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
10814 - Rename two fields of connection_t struct. timestamp_lastwritten is
10815 renamed to timestamp_last_write_allowed and timestamp_lastread is
10816 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
10818 - Since Tor requires C99, remove our old workaround code for libc
10819 implementations where free(NULL) doesn't work. Closes ticket 24484.
10820 - Use our standard rate-limiting code to deal with excessive
10821 libevent failures, rather than the hand-rolled logic we had
10822 before. Closes ticket 26016.
10823 - We remove the return value of node_get_prim_orport() and
10824 node_get_prim_dirport(), and introduce node_get_prim_orport() in
10825 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
10826 check for a null address. Closes ticket 23873. Patch by
10828 - We switch to should_record_bridge_info() in
10829 geoip_note_client_seen() and options_need_geoip_info() instead of
10830 accessing the configuration values directly. Fixes bug 25290;
10831 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
10833 o Deprecated features:
10834 - As we are not recommending 0.2.5 anymore, we require relays that
10835 once had an ed25519 key associated with their RSA key to always
10836 have that key, instead of allowing them to drop back to a version
10837 that didn't support ed25519. This means they need to use a new RSA
10838 key if they want to downgrade to an older version of tor without
10839 ed25519. Closes ticket 20522.
10842 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
10843 ticket 25857. Patch from "CTassisF".
10845 o Removed features:
10846 - Directory authorities will no longer support voting according to
10847 any consensus method before consensus method 25. This keeps
10848 authorities compatible with all authorities running 0.2.9.8 and
10849 later, and does not break any clients or relays. Implements ticket
10850 24378 and proposal 290.
10851 - The PortForwarding and PortForwardingHelper features have been
10852 removed. The reasoning is, given that implementations of NAT
10853 traversal protocols within common consumer grade routers are
10854 frequently buggy, and that the target audience for a NAT punching
10855 feature is a perhaps less-technically-inclined relay operator,
10856 when the helper fails to setup traversal the problems are usually
10857 deep, ugly, and very router specific, making them horrendously
10858 impossible for technical support to reliable assist with, and thus
10859 resulting in frustration all around. Unfortunately, relay
10860 operators who would like to run relays behind NATs will need to
10861 become more familiar with the port forwarding configurations on
10862 their local router. Closes 25409.
10863 - The TestingEnableTbEmptyEvent option has been removed. It was used
10864 in testing simulations to measure how often connection buckets
10865 were emptied, in order to improve our scheduling, but it has not
10866 been actively used in years. Closes ticket 25760.
10867 - The old "round-robin" circuit multiplexer (circuitmux)
10868 implementation has been removed, along with a fairly large set of
10869 code that existed to support it. It has not been the default
10870 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
10871 but it still required an unreasonable amount of memory and CPU.
10872 Closes ticket 25268.
10875 Changes in version 0.3.3.5-rc - 2018-04-15
10876 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
10877 including some that could affect reliability or correctness.
10879 This is the first release candidate in the 0.3.3 series. If we find no
10880 new bugs or regression here, then the first stable 0.3.3 release will
10881 be nearly identical to this one.
10883 o Major bugfixes (security, protover, voting):
10884 - Revise Rust implementation of protover to use a more memory-
10885 efficient voting algorithm and corresponding data structures, thus
10886 avoiding a potential memory-based DoS attack where specially
10887 crafted protocol strings would expand to fill available memory.
10888 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
10890 o Major bugfixes (performance, load balancing):
10891 - Directory authorities no longer vote in favor of the Guard flag
10892 for relays without directory support. Starting in Tor
10893 0.3.0.1-alpha, clients have been avoiding using such relays in the
10894 Guard position, leading to increasingly broken load balancing for
10895 the 5%-or-so of Guards that don't advertise directory support.
10896 Fixes bug 22310; bugfix on 0.3.0.6.
10898 o Minor feature (continuous integration):
10899 - Update the Travis CI configuration to use the stable Rust channel,
10900 now that we have decided to require that. Closes ticket 25714.
10902 o Minor features (config options):
10903 - Change the way the default value for MaxMemInQueues is calculated.
10904 We now use 40% of the hardware RAM if the system has 8 GB RAM or
10905 more. Otherwise we use the former value of 75%. Closes
10908 o Minor features (geoip):
10909 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
10910 Country database. Closes ticket 25718.
10912 o Minor bugfixes (client):
10913 - When using a listed relay as a bridge, and also using
10914 microdescriptors, and considering that relay as a non-bridge in a
10915 circuit, treat its microdescriptor as a valid source of
10916 information about that relay. This change should prevent a non-
10917 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
10919 o Minor bugfixes (controller):
10920 - Restore the correct operation of the RESOLVE command, which had
10921 been broken since we added the ability to enable/disable DNS on
10922 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
10924 o Minor bugfixes (distribution, compilation, rust):
10925 - Build correctly when the rust dependencies submodule is loaded,
10926 but the TOR_RUST_DEPENDENCIES environment variable is not set.
10927 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
10928 - Actually include all of our Rust source in our source
10929 distributions. (Previously, a few of the files were accidentally
10930 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
10932 o Minor bugfixes (documentation):
10933 - Document that the PerConnBW{Rate,Burst} options will fall back to
10934 their corresponding consensus parameters only if those parameters
10935 are set. Previously we had claimed that these values would always
10936 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10937 - Revert a misformatting issue in the ExitPolicy documentation.
10938 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
10940 o Minor bugfixes (exit relay DNS retries):
10941 - Re-attempt timed-out DNS queries 3 times before failure, since our
10942 timeout is 5 seconds for them, but clients wait 10-15. Also allow
10943 slightly more timeouts per resolver when an exit has multiple
10944 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
10946 o Minor bugfixes (onion services):
10947 - Re-instate counting the client HSDir fetch circuits against the
10948 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
10950 - Remove underscores from the _HSLayer{2,3}Nodes options. This
10951 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
10952 Fixes bug 25581; bugfix on 0.3.3.1-alpha
10954 o Code simplification and refactoring:
10955 - Move the list of default directory authorities to its own file.
10956 Closes ticket 24854. Patch by "beastr0".
10958 o Documentation (manpage, denial of service):
10959 - Provide more detail about the denial-of-service options, by
10960 listing each mitigation and explaining how they relate. Closes
10964 Changes in version 0.3.3.4-alpha - 2018-03-29
10965 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
10966 the alpha testing of earlier releases in its series. We are
10967 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
10969 o New system requirements:
10970 - When built with Rust, Tor now depends on version 0.2.39 of the
10971 libc crate. Closes tickets 25310 and 25664.
10973 o Major bugfixes (relay, connection):
10974 - If we have failed to connect to a relay and received a connection
10975 refused, timeout, or similar error (at the TCP level), do not try
10976 that same address/port again for 60 seconds after the failure has
10977 occurred. Fixes bug 24767; bugfix on 0.0.6.
10979 o Minor features (geoip):
10980 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
10981 Country database. Closes ticket 25469.
10983 o Minor features (log messages):
10984 - Improve log message in the out-of-memory handler to include
10985 information about memory usage from the different compression
10986 backends. Closes ticket 25372.
10988 o Minor features (sandbox):
10989 - Explicitly permit the poll() system call when the Linux
10990 seccomp2-based sandbox is enabled: apparently, some versions of
10991 libc use poll() when calling getpwnam(). Closes ticket 25313.
10993 o Minor bugfixes (C correctness):
10994 - Fix a very unlikely (impossible, we believe) null pointer
10995 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10996 Coverity; this is CID 1430932.
10998 o Minor bugfixes (channel, client):
10999 - Better identify client connection when reporting to the geoip
11000 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
11002 o Minor bugfixes (compilation):
11003 - Fix a C99 compliance issue in our configuration script that caused
11004 compilation issues when compiling Tor with certain versions of
11005 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
11007 o Minor bugfixes (controller, reliability):
11008 - Avoid a (nonfatal) assertion failure when extending a one-hop
11009 circuit from the controller to become a multihop circuit. Fixes
11010 bug 24903; bugfix on 0.2.5.2-alpha.
11012 o Major bugfixes (networking):
11013 - Tor will no longer reject IPv6 address strings from Tor Browser
11014 when they are passed as hostnames in SOCKS5 requests. Fixes bug
11015 25036, bugfix on Tor 0.3.1.2.
11017 o Minor bugfixes (networking):
11018 - string_is_valid_hostname() will not consider IP strings to be
11019 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
11021 o Minor bugfixes (onion service v3):
11022 - Avoid an assertion failure when the next onion service
11023 descriptor rotation type is out of sync with the consensus's
11024 valid-after time. Instead, log a warning message with extra
11025 information, so we can better hunt down the cause of this
11026 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
11028 o Minor bugfixes (testing):
11029 - Avoid intermittent test failures due to a test that had relied on
11030 onion service introduction point creation finishing within 5
11031 seconds of real clock time. Fixes bug 25450; bugfix
11033 - Rust crates are now automatically detected and tested. Previously,
11034 some crates were not tested by `make test-rust` due to a static
11035 string in the `src/test/test_rust.sh` script specifying which
11036 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
11038 o Minor bugfixes (testing, benchmarks):
11039 - Fix a crash when running benchmark tests on win32 systems. The
11040 crash was due to a mutex that wasn't initialized before logging
11041 and options were initialized. Fixes bug 25479; bugfix
11044 o Minor bugfixes (warnings, ipv6):
11045 - Avoid a bug warning that could occur when trying to connect to a
11046 relay over IPv6. This warning would occur on a Tor instance that
11047 downloads router descriptors, but prefers to use microdescriptors.
11048 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
11050 o Code simplification and refactoring:
11051 - Remove the old (deterministic) directory retry logic entirely:
11052 We've used exponential backoff exclusively for some time. Closes
11056 - Improved the documentation of AccountingStart parameter. Closes
11058 - Update the documentation for "Log" to include the current list of
11059 logging domains. Closes ticket 25378.
11062 Changes in version 0.3.1.10 - 2018-03-03
11063 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
11066 It includes an important security fix for a remote crash attack
11067 against directory authorities, tracked as TROVE-2018-001.
11069 This release also backports our new system for improved resistance to
11070 denial-of-service attacks against relays.
11072 This release also fixes several minor bugs and annoyances from
11075 All directory authorities should upgrade to one of the versions
11076 released today. Relays running 0.3.1.x may wish to update to one of
11077 the versions released today, for the DoS mitigations.
11079 Please note: according to our release calendar, Tor 0.3.1 will no
11080 longer be supported after 1 July 2018. If you will be running Tor
11081 after that date, you should make sure to plan to upgrade to the latest
11082 stable version, or downgrade to 0.2.9 (which will receive long-term
11085 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11086 - Fix a protocol-list handling bug that could be used to remotely crash
11087 directory authorities with a null-pointer exception. Fixes bug 25074;
11088 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11091 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11092 - Give relays some defenses against the recent network overload. We
11093 start with three defenses (default parameters in parentheses).
11094 First: if a single client address makes too many concurrent
11095 connections (>100), hang up on further connections. Second: if a
11096 single client address makes circuits too quickly (more than 3 per
11097 second, with an allowed burst of 90) while also having too many
11098 connections open (3), refuse new create cells for the next while
11099 (1-2 hours). Third: if a client asks to establish a rendezvous
11100 point to you directly, ignore the request. These defenses can be
11101 manually controlled by new torrc options, but relays will also
11102 take guidance from consensus parameters, so there's no need to
11103 configure anything manually. Implements ticket 24902.
11105 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11106 - Update the sandbox rules so that they should now work correctly
11107 with Glibc 2.26. Closes ticket 24315.
11109 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11110 - Fix an "off by 2" error in counting rendezvous failures on the
11111 onion service side. While we thought we would stop the rendezvous
11112 attempt after one failed circuit, we were actually making three
11113 circuit attempts before giving up. Now switch to a default of 2,
11114 and allow the consensus parameter "hs_service_max_rdv_failures" to
11115 override. Fixes bug 24895; bugfix on 0.0.6.
11117 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11118 - Add Link protocol version 5 to the supported protocols list. Fixes
11119 bug 25070; bugfix on 0.3.1.1-alpha.
11121 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11122 - Fix a set of false positives where relays would consider
11123 connections to other relays as being client-only connections (and
11124 thus e.g. deserving different link padding schemes) if those
11125 relays fell out of the consensus briefly. Now we look only at the
11126 initial handshake and whether the connection authenticated as a
11127 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11129 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11130 - Make our OOM handler aware of the geoip client history cache so it
11131 doesn't fill up the memory. This check is important for IPv6 and
11132 our DoS mitigation subsystem. Closes ticket 25122.
11134 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
11135 - Change relay bandwidth reporting stats interval from 4 hours to 24
11136 hours in order to reduce the efficiency of guard discovery
11137 attacks. Fixes ticket 23856.
11139 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11140 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11141 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11142 since they neither disabled TLS 1.3 nor enabled any of the
11143 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11144 Closes ticket 24978.
11146 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
11147 - The fallback directory list has been re-generated based on the
11148 current status of the network. Tor uses fallback directories to
11149 bootstrap when it doesn't yet have up-to-date directory
11150 information. Closes ticket 24801.
11151 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11152 prefer to bootstrap from fallback directory mirrors. This is a
11153 follow-up to 24679, which removed weights from the default
11154 fallbacks. Implements ticket 24681.
11156 o Minor features (geoip):
11157 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11160 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11161 - Use the actual observed address of an incoming relay connection,
11162 not the canonical address of the relay from its descriptor, when
11163 making decisions about how to handle the incoming connection.
11164 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11166 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11167 - Directory authorities, when refusing a descriptor from a rejected
11168 relay, now explicitly tell the relay (in its logs) to set a valid
11169 ContactInfo address and contact the bad-relays@ mailing list.
11170 Fixes bug 25170; bugfix on 0.2.9.1.
11172 o Minor bugfixes (address selection, backport from 0.3.2.9):
11173 - When the fascist_firewall_choose_address_ functions don't find a
11174 reachable address, set the returned address to the null address
11175 and port. This is a precautionary measure, because some callers do
11176 not check the return value. Fixes bug 24736; bugfix
11179 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
11180 - Fetch descriptors aggressively whenever we lack enough to build
11181 circuits, regardless of how many descriptors we are missing.
11182 Previously, we would delay launching the fetch when we had fewer
11183 than 15 missing descriptors, even if some of those descriptors
11184 were blocking circuits from building. Fixes bug 23985; bugfix on
11185 0.1.1.11-alpha. The effects of this bug became worse in
11186 0.3.0.3-alpha, when we began treating missing descriptors from our
11187 primary guards as a reason to delay circuits.
11188 - Don't try fetching microdescriptors from relays that have failed
11189 to deliver them in the past. Fixes bug 23817; bugfix
11192 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
11193 - Fix a signed/unsigned comparison warning introduced by our fix to
11194 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11196 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
11197 - Avoid a crash when attempting to use the seccomp2 sandbox together
11198 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11201 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11202 - Fix a possible crash on malformed consensus. If a consensus had
11203 contained an unparseable protocol line, it could have made clients
11204 and relays crash with a null-pointer exception. To exploit this
11205 issue, however, an attacker would need to be able to subvert the
11206 directory authority system. Fixes bug 25251; bugfix on
11207 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11209 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
11210 - Recover better from empty or corrupt files in the consensus cache
11211 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
11212 - When a consensus diff calculation is only partially successful,
11213 only record the successful parts as having succeeded. Partial
11214 success can happen if (for example) one compression method fails
11215 but the others succeed. Previously we misrecorded all the
11216 calculations as having succeeded, which would later cause a
11217 nonfatal assertion failure. Fixes bug 24086; bugfix
11220 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
11221 - Tor now updates its guard state when it reads a consensus
11222 regardless of whether it's missing descriptors. That makes tor use
11223 its primary guards to fetch descriptors in some edge cases where
11224 it would previously have used fallback directories. Fixes bug
11225 23862; bugfix on 0.3.0.1-alpha.
11227 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11228 - Don't treat inability to store a cached consensus object as a bug:
11229 it can happen normally when we are out of disk space. Fixes bug
11230 24859; bugfix on 0.3.1.1-alpha.
11232 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
11233 - When queuing DESTROY cells on a channel, only queue the circuit-id
11234 and reason fields: not the entire 514-byte cell. This fix should
11235 help mitigate any bugs or attacks that fill up these queues, and
11236 free more RAM for other uses. Fixes bug 24666; bugfix
11239 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
11240 - When closing a connection via close_connection_immediately(), we
11241 mark it as "not blocked on bandwidth", to prevent later calls from
11242 trying to unblock it, and give it permission to read. This fixes a
11243 backtrace warning that can happen on relays under various
11244 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11246 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
11247 - When selecting relays by bandwidth, avoid a rounding error that
11248 could sometimes cause load to be imbalanced incorrectly.
11249 Previously, we would always round upwards; now, we round towards
11250 the nearest integer. This had the biggest effect when a relay's
11251 weight adjustments should have given it weight 0, but it got
11252 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11253 - When calculating the fraction of nodes that have descriptors, and
11254 all nodes in the network have zero bandwidths, count the number of
11255 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11256 - Actually log the total bandwidth in compute_weighted_bandwidths().
11257 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11259 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11260 - Improve the performance of our consensus-diff application code
11261 when Tor is built with the --enable-fragile-hardening option set.
11262 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11264 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11265 - Don't exit the Tor process if setrlimit() fails to change the file
11266 limit (which can happen sometimes on some versions of OSX). Fixes
11267 bug 21074; bugfix on 0.0.9pre5.
11269 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
11270 - Fix a bug in the bit-counting parts of our timing-wheel code on
11271 MSVC. (Note that MSVC is still not a supported build platform, due
11272 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
11275 o Minor bugfixes (relay, partial backport):
11276 - Make the internal channel_is_client() function look at what sort
11277 of connection handshake the other side used, rather than whether
11278 the other side ever sent a create_fast cell to us. Backports part
11279 of the fixes from bugs 22805 and 24898.
11281 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11282 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11284 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11285 bugfix on 0.2.9.4-alpha.
11287 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11288 - Update the "rust dependencies" submodule to be a project-level
11289 repository, rather than a user repository. Closes ticket 25323.
11292 Changes in version 0.2.9.15 - 2018-03-03
11293 Tor 0.2.9.15 backports important security and stability bugfixes from
11294 later Tor releases.
11296 It includes an important security fix for a remote crash attack
11297 against directory authorities, tracked as TROVE-2018-001.
11299 This release also backports our new system for improved resistance to
11300 denial-of-service attacks against relays.
11302 This release also fixes several minor bugs and annoyances from
11305 All directory authorities should upgrade to one of the versions
11306 released today. Relays running 0.2.9.x may wish to update to one of
11307 the versions released today, for the DoS mitigations.
11309 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11310 - Fix a protocol-list handling bug that could be used to remotely crash
11311 directory authorities with a null-pointer exception. Fixes bug 25074;
11312 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11315 o Major features (denial-of-service mitigation):
11316 - Give relays some defenses against the recent network overload. We
11317 start with three defenses (default parameters in parentheses).
11318 First: if a single client address makes too many concurrent
11319 connections (>100), hang up on further connections. Second: if a
11320 single client address makes circuits too quickly (more than 3 per
11321 second, with an allowed burst of 90) while also having too many
11322 connections open (3), refuse new create cells for the next while
11323 (1-2 hours). Third: if a client asks to establish a rendezvous
11324 point to you directly, ignore the request. These defenses can be
11325 manually controlled by new torrc options, but relays will also
11326 take guidance from consensus parameters, so there's no need to
11327 configure anything manually. Implements ticket 24902.
11329 o Major bugfixes (bootstrapping):
11330 - Fetch descriptors aggressively whenever we lack enough to build
11331 circuits, regardless of how many descriptors we are missing.
11332 Previously, we would delay launching the fetch when we had fewer
11333 than 15 missing descriptors, even if some of those descriptors
11334 were blocking circuits from building. Fixes bug 23985; bugfix on
11335 0.1.1.11-alpha. The effects of this bug became worse in
11336 0.3.0.3-alpha, when we began treating missing descriptors from our
11337 primary guards as a reason to delay circuits.
11339 o Major bugfixes (onion services, retry behavior):
11340 - Fix an "off by 2" error in counting rendezvous failures on the
11341 onion service side. While we thought we would stop the rendezvous
11342 attempt after one failed circuit, we were actually making three
11343 circuit attempts before giving up. Now switch to a default of 2,
11344 and allow the consensus parameter "hs_service_max_rdv_failures" to
11345 override. Fixes bug 24895; bugfix on 0.0.6.
11347 o Minor feature (relay statistics):
11348 - Change relay bandwidth reporting stats interval from 4 hours to 24
11349 hours in order to reduce the efficiency of guard discovery
11350 attacks. Fixes ticket 23856.
11352 o Minor features (compatibility, OpenSSL):
11353 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11354 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11355 since they neither disabled TLS 1.3 nor enabled any of the
11356 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11357 Closes ticket 24978.
11359 o Minor features (denial-of-service avoidance):
11360 - Make our OOM handler aware of the geoip client history cache so it
11361 doesn't fill up the memory. This check is important for IPv6 and
11362 our DoS mitigation subsystem. Closes ticket 25122.
11364 o Minor features (fallback directory mirrors):
11365 - The fallback directory list has been re-generated based on the
11366 current status of the network. Tor uses fallback directories to
11367 bootstrap when it doesn't yet have up-to-date directory
11368 information. Closes ticket 24801.
11369 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11370 prefer to bootstrap from fallback directory mirrors. This is a
11371 follow-up to 24679, which removed weights from the default
11372 fallbacks. Implements ticket 24681.
11374 o Minor features (geoip):
11375 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11378 o Minor features (linux seccomp2 sandbox):
11379 - Update the sandbox rules so that they should now work correctly
11380 with Glibc 2.26. Closes ticket 24315.
11382 o Minor bugfix (channel connection):
11383 - Use the actual observed address of an incoming relay connection,
11384 not the canonical address of the relay from its descriptor, when
11385 making decisions about how to handle the incoming connection.
11386 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11388 o Minor bugfix (directory authority):
11389 - Directory authorities, when refusing a descriptor from a rejected
11390 relay, now explicitly tell the relay (in its logs) to set a valid
11391 ContactInfo address and contact the bad-relays@ mailing list.
11392 Fixes bug 25170; bugfix on 0.2.9.1.
11394 o Minor bugfixes (address selection):
11395 - When the fascist_firewall_choose_address_ functions don't find a
11396 reachable address, set the returned address to the null address
11397 and port. This is a precautionary measure, because some callers do
11398 not check the return value. Fixes bug 24736; bugfix
11401 o Minor bugfixes (compilation):
11402 - Fix a signed/unsigned comparison warning introduced by our fix to
11403 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11405 o Minor bugfixes (control port, linux seccomp2 sandbox):
11406 - Avoid a crash when attempting to use the seccomp2 sandbox together
11407 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
11410 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11411 - Fix a possible crash on malformed consensus. If a consensus had
11412 contained an unparseable protocol line, it could have made clients
11413 and relays crash with a null-pointer exception. To exploit this
11414 issue, however, an attacker would need to be able to subvert the
11415 directory authority system. Fixes bug 25251; bugfix on
11416 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11418 o Minor bugfixes (memory usage):
11419 - When queuing DESTROY cells on a channel, only queue the circuit-id
11420 and reason fields: not the entire 514-byte cell. This fix should
11421 help mitigate any bugs or attacks that fill up these queues, and
11422 free more RAM for other uses. Fixes bug 24666; bugfix
11425 o Minor bugfixes (network layer):
11426 - When closing a connection via close_connection_immediately(), we
11427 mark it as "not blocked on bandwidth", to prevent later calls from
11428 trying to unblock it, and give it permission to read. This fixes a
11429 backtrace warning that can happen on relays under various
11430 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
11432 o Minor bugfixes (OSX):
11433 - Don't exit the Tor process if setrlimit() fails to change the file
11434 limit (which can happen sometimes on some versions of OSX). Fixes
11435 bug 21074; bugfix on 0.0.9pre5.
11437 o Minor bugfixes (path selection):
11438 - When selecting relays by bandwidth, avoid a rounding error that
11439 could sometimes cause load to be imbalanced incorrectly.
11440 Previously, we would always round upwards; now, we round towards
11441 the nearest integer. This had the biggest effect when a relay's
11442 weight adjustments should have given it weight 0, but it got
11443 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
11444 - When calculating the fraction of nodes that have descriptors, and
11445 all nodes in the network have zero bandwidths, count the number of
11446 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
11447 - Actually log the total bandwidth in compute_weighted_bandwidths().
11448 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
11450 o Minor bugfixes (portability, msvc):
11451 - Fix a bug in the bit-counting parts of our timing-wheel code on
11452 MSVC. (Note that MSVC is still not a supported build platform, due
11453 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11456 o Minor bugfixes (relay):
11457 - Make the internal channel_is_client() function look at what sort
11458 of connection handshake the other side used, rather than whether
11459 the other side ever sent a create_fast cell to us. Backports part
11460 of the fixes from bugs 22805 and 24898.
11462 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11463 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11465 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11466 bugfix on 0.2.9.4-alpha.
11469 Changes in version 0.3.2.10 - 2018-03-03
11470 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
11471 backports a number of bugfixes, including important fixes for security
11474 It includes an important security fix for a remote crash attack
11475 against directory authorities, tracked as TROVE-2018-001.
11477 Additionally, it backports a fix for a bug whose severity we have
11478 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
11479 triggered in order to crash relays with a use-after-free pattern. As
11480 such, we are now tracking that bug as TROVE-2018-002 and
11481 CVE-2018-0491, and backporting it to earlier releases. This bug
11482 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
11485 This release also backports our new system for improved resistance to
11486 denial-of-service attacks against relays.
11488 This release also fixes several minor bugs and annoyances from
11491 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
11492 today, for the fix to TROVE-2018-002. Directory authorities should
11493 also upgrade. (Relays on earlier versions might want to update too for
11494 the DoS mitigations.)
11496 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
11497 - Fix a protocol-list handling bug that could be used to remotely crash
11498 directory authorities with a null-pointer exception. Fixes bug 25074;
11499 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11502 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
11503 - Avoid adding the same channel twice in the KIST scheduler pending
11504 list, which could lead to remote denial-of-service use-after-free
11505 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
11507 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
11508 - Give relays some defenses against the recent network overload. We
11509 start with three defenses (default parameters in parentheses).
11510 First: if a single client address makes too many concurrent
11511 connections (>100), hang up on further connections. Second: if a
11512 single client address makes circuits too quickly (more than 3 per
11513 second, with an allowed burst of 90) while also having too many
11514 connections open (3), refuse new create cells for the next while
11515 (1-2 hours). Third: if a client asks to establish a rendezvous
11516 point to you directly, ignore the request. These defenses can be
11517 manually controlled by new torrc options, but relays will also
11518 take guidance from consensus parameters, so there's no need to
11519 configure anything manually. Implements ticket 24902.
11521 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
11522 - Fix an "off by 2" error in counting rendezvous failures on the
11523 onion service side. While we thought we would stop the rendezvous
11524 attempt after one failed circuit, we were actually making three
11525 circuit attempts before giving up. Now switch to a default of 2,
11526 and allow the consensus parameter "hs_service_max_rdv_failures" to
11527 override. Fixes bug 24895; bugfix on 0.0.6.
11528 - New-style (v3) onion services now obey the "max rendezvous circuit
11529 attempts" logic. Previously they would make as many rendezvous
11530 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11531 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11533 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
11534 - Add Link protocol version 5 to the supported protocols list. Fixes
11535 bug 25070; bugfix on 0.3.1.1-alpha.
11537 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
11538 - Fix a set of false positives where relays would consider
11539 connections to other relays as being client-only connections (and
11540 thus e.g. deserving different link padding schemes) if those
11541 relays fell out of the consensus briefly. Now we look only at the
11542 initial handshake and whether the connection authenticated as a
11543 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11545 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
11546 - The scheduler subsystem was failing to promptly notice changes in
11547 consensus parameters, making it harder to switch schedulers
11548 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
11550 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
11551 - Make our OOM handler aware of the geoip client history cache so it
11552 doesn't fill up the memory. This check is important for IPv6 and
11553 our DoS mitigation subsystem. Closes ticket 25122.
11555 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
11556 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11557 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11558 since they neither disabled TLS 1.3 nor enabled any of the
11559 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11560 Closes ticket 24978.
11562 o Minor features (geoip):
11563 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11566 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
11567 - When logging a failure to create an onion service's descriptor,
11568 also log what the problem with the descriptor was. Diagnostic
11571 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
11572 - Use the actual observed address of an incoming relay connection,
11573 not the canonical address of the relay from its descriptor, when
11574 making decisions about how to handle the incoming connection.
11575 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11577 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
11578 - Fix a possible crash on malformed consensus. If a consensus had
11579 contained an unparseable protocol line, it could have made clients
11580 and relays crash with a null-pointer exception. To exploit this
11581 issue, however, an attacker would need to be able to subvert the
11582 directory authority system. Fixes bug 25251; bugfix on
11583 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11585 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
11586 - Directory authorities, when refusing a descriptor from a rejected
11587 relay, now explicitly tell the relay (in its logs) to set a valid
11588 ContactInfo address and contact the bad-relays@ mailing list.
11589 Fixes bug 25170; bugfix on 0.2.9.1.
11591 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
11592 - When building with Rust on OSX, link against libresolv, to work
11593 around the issue at https://github.com/rust-lang/rust/issues/46797.
11594 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11596 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
11597 - Remove a BUG() statement when a client fetches an onion descriptor
11598 that has a lower revision counter than the one in its cache. This
11599 can happen in normal circumstances due to HSDir desync. Fixes bug
11600 24976; bugfix on 0.3.2.1-alpha.
11602 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
11603 - Don't treat inability to store a cached consensus object as a bug:
11604 it can happen normally when we are out of disk space. Fixes bug
11605 24859; bugfix on 0.3.1.1-alpha.
11607 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
11608 - Improve the performance of our consensus-diff application code
11609 when Tor is built with the --enable-fragile-hardening option set.
11610 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11612 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
11613 - Don't exit the Tor process if setrlimit() fails to change the file
11614 limit (which can happen sometimes on some versions of OSX). Fixes
11615 bug 21074; bugfix on 0.0.9pre5.
11617 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
11618 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11620 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11621 bugfix on 0.2.9.4-alpha.
11623 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
11624 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11625 25005; bugfix on 0.3.2.7-rc.
11627 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
11628 - Look at the "HSRend" protocol version, not the "HSDir" protocol
11629 version, when deciding whether a consensus entry can support the
11630 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
11631 bugfix on 0.3.2.1-alpha.
11633 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
11634 - Update the "rust dependencies" submodule to be a project-level
11635 repository, rather than a user repository. Closes ticket 25323.
11637 o Documentation (backport from 0.3.3.1-alpha)
11638 - Document that operators who run more than one relay or bridge are
11639 expected to set MyFamily and ContactInfo correctly. Closes
11643 Changes in version 0.3.3.3-alpha - 2018-03-03
11644 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
11645 It includes an important security fix for a remote crash attack
11646 against directory authorities tracked as TROVE-2018-001.
11648 Additionally, with this release, we are upgrading the severity of a
11649 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
11650 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
11651 a use-after-free pattern. As such, we are now tracking that bug as
11652 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
11653 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
11655 This release also fixes several minor bugs and annoyances from
11658 Relays running 0.3.2.x should upgrade to one of the versions released
11659 today, for the fix to TROVE-2018-002. Directory authorities should
11660 also upgrade. (Relays on earlier versions might want to update too for
11661 the DoS mitigations.)
11663 o Major bugfixes (denial-of-service, directory authority):
11664 - Fix a protocol-list handling bug that could be used to remotely crash
11665 directory authorities with a null-pointer exception. Fixes bug 25074;
11666 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
11669 o Minor features (compatibility, OpenSSL):
11670 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
11671 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
11672 since they neither disabled TLS 1.3 nor enabled any of the
11673 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
11674 Closes ticket 24978.
11676 o Minor features (logging):
11677 - Clarify the log messages produced when getrandom() or a related
11678 entropy-generation mechanism gives an error. Closes ticket 25120.
11680 o Minor features (testing):
11681 - Add a "make test-rust" target to run the rust tests only. Closes
11684 o Minor bugfixes (denial-of-service):
11685 - Fix a possible crash on malformed consensus. If a consensus had
11686 contained an unparseable protocol line, it could have made clients
11687 and relays crash with a null-pointer exception. To exploit this
11688 issue, however, an attacker would need to be able to subvert the
11689 directory authority system. Fixes bug 25251; bugfix on
11690 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
11692 o Minor bugfixes (DoS mitigation):
11693 - Add extra safety checks when refilling the circuit creation bucket
11694 to ensure we never set a value above the allowed maximum burst.
11695 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
11696 - When a new consensus arrives, don't update our DoS-mitigation
11697 parameters if we aren't a public relay. Fixes bug 25223; bugfix
11700 o Minor bugfixes (man page, SocksPort):
11701 - Remove dead code from the old "SocksSocket" option, and rename
11702 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
11703 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
11705 o Minor bugfixes (performance):
11706 - Reduce the number of circuits that will be opened at once during
11707 the circuit build timeout phase. This is done by increasing the
11708 idle timeout to 3 minutes, and lowering the maximum number of
11709 concurrent learning circuits to 10. Fixes bug 24769; bugfix
11712 o Minor bugfixes (spec conformance):
11713 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
11715 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
11716 bugfix on 0.2.9.4-alpha.
11718 o Minor bugfixes (spec conformance, rust):
11719 - Resolve a denial-of-service issue caused by an infinite loop in
11720 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
11721 Also tracked as TROVE-2018-003.
11723 o Code simplification and refactoring:
11724 - Update the "rust dependencies" submodule to be a project-level
11725 repository, rather than a user repository. Closes ticket 25323.
11728 Changes in version 0.3.3.2-alpha - 2018-02-10
11729 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
11730 introduces a mechanism to handle the high loads that many relay
11731 operators have been reporting recently. It also fixes several bugs in
11732 older releases. If this new code proves reliable, we plan to backport
11733 it to older supported release series.
11735 o Major features (denial-of-service mitigation):
11736 - Give relays some defenses against the recent network overload. We
11737 start with three defenses (default parameters in parentheses).
11738 First: if a single client address makes too many concurrent
11739 connections (>100), hang up on further connections. Second: if a
11740 single client address makes circuits too quickly (more than 3 per
11741 second, with an allowed burst of 90) while also having too many
11742 connections open (3), refuse new create cells for the next while
11743 (1-2 hours). Third: if a client asks to establish a rendezvous
11744 point to you directly, ignore the request. These defenses can be
11745 manually controlled by new torrc options, but relays will also
11746 take guidance from consensus parameters, so there's no need to
11747 configure anything manually. Implements ticket 24902.
11749 o Major bugfixes (netflow padding):
11750 - Stop adding unneeded channel padding right after we finish
11751 flushing to a connection that has been trying to flush for many
11752 seconds. Instead, treat all partial or complete flushes as
11753 activity on the channel, which will defer the time until we need
11754 to add padding. This fix should resolve confusing and scary log
11755 messages like "Channel padding timeout scheduled 221453ms in the
11756 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
11758 o Major bugfixes (protocol versions):
11759 - Add Link protocol version 5 to the supported protocols list. Fixes
11760 bug 25070; bugfix on 0.3.1.1-alpha.
11762 o Major bugfixes (scheduler, consensus):
11763 - The scheduler subsystem was failing to promptly notice changes in
11764 consensus parameters, making it harder to switch schedulers
11765 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
11767 o Minor features (denial-of-service avoidance):
11768 - Make our OOM handler aware of the geoip client history cache so it
11769 doesn't fill up the memory. This check is important for IPv6 and
11770 our DoS mitigation subsystem. Closes ticket 25122.
11772 o Minor features (directory authority):
11773 - When directory authorities are unable to add signatures to a
11774 pending consensus, log the reason why. Closes ticket 24849.
11776 o Minor features (geoip):
11777 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
11780 o Minor features (logging, diagnostic):
11781 - When logging a failure to create an onion service's descriptor,
11782 also log what the problem with the descriptor was. Diagnostic for
11785 o Minor bugfix (channel connection):
11786 - Use the actual observed address of an incoming relay connection,
11787 not the canonical address of the relay from its descriptor, when
11788 making decisions about how to handle the incoming connection.
11789 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
11791 o Minor bugfix (directory authority):
11792 - Directory authorities, when refusing a descriptor from a rejected
11793 relay, now explicitly tell the relay (in its logs) to set a valid
11794 ContactInfo address and contact the bad-relays@ mailing list.
11795 Fixes bug 25170; bugfix on 0.2.9.1.
11797 o Minor bugfixes (all versions of Tor):
11798 - Use the "misspell" tool to detect and fix typos throughout the
11799 source code. Fixes bug 23650; bugfix on various versions of Tor.
11800 Patch from Deepesh Pathak.
11802 o Minor bugfixes (circuit, cannibalization):
11803 - Don't cannibalize preemptively-built circuits if we no longer
11804 recognize their first hop. This situation can happen if our Guard
11805 relay went off the consensus after the circuit was created. Fixes
11806 bug 24469; bugfix on 0.0.6.
11808 o Minor bugfixes (correctness):
11809 - Remove a nonworking, unnecessary check to see whether a circuit
11810 hop's identity digest was set when the circuit failed. Fixes bug
11811 24927; bugfix on 0.2.4.4-alpha.
11813 o Minor bugfixes (logging):
11814 - Don't treat inability to store a cached consensus object as a bug:
11815 it can happen normally when we are out of disk space. Fixes bug
11816 24859; bugfix on 0.3.1.1-alpha.
11817 - Fix a (mostly harmless) race condition when invoking
11818 LOG_PROTOCOL_WARN message from a subthread while the torrc options
11819 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
11821 o Minor bugfixes (onion services):
11822 - Remove a BUG() statement when a client fetches an onion descriptor
11823 that has a lower revision counter than the one in its cache. This
11824 can happen in normal circumstances due to HSDir desync. Fixes bug
11825 24976; bugfix on 0.3.2.1-alpha.
11826 - If we are configured to offer a single onion service, don't log
11827 long-term established one hop rendezvous points in the heartbeat.
11828 Fixes bug 25116; bugfix on 0.2.9.6-rc.
11830 o Minor bugfixes (performance):
11831 - Avoid calling protocol_list_supports_protocol() from inside tight
11832 loops when running with cached routerinfo_t objects. Instead,
11833 summarize the relevant protocols as flags in the routerinfo_t, as
11834 we do for routerstatus_t objects. This change simplifies our code
11835 a little, and saves a large amount of short-term memory allocation
11836 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
11838 o Minor bugfixes (Rust FFI):
11839 - Fix a minor memory leak which would happen whenever the C code
11840 would call the Rust implementation of
11841 protover_get_supported_protocols(). This was due to the C version
11842 returning a static string, whereas the Rust version newly allocated
11843 a CString to pass across the FFI boundary. Consequently, the C
11844 code was not expecting to need to free() what it was given. Fixes
11845 bug 25127; bugfix on 0.3.2.1-alpha.
11847 o Minor bugfixes (scheduler, KIST):
11848 - Avoid adding the same channel twice in the KIST scheduler pending
11849 list, which would waste CPU cycles. Fixes bug 24700; bugfix
11852 o Minor bugfixes (unit test, monotonic time):
11853 - Increase a constant (1msec to 10msec) in the monotonic time test
11854 that makes sure the nsec/usec/msec times read are synchronized.
11855 This change was needed to accommodate slow systems like armel or
11856 when the clock_gettime() is not a VDSO on the running kernel.
11857 Fixes bug 25113; bugfix on 0.2.9.1.
11859 o Minor bugfixes (v3 onion services):
11860 - Look at the "HSRend" protocol version, not the "HSDir" protocol
11861 version, when deciding whether a consensus entry can support the
11862 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
11863 bugfix on 0.3.2.1-alpha.
11865 o Code simplification and refactoring:
11866 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
11868 - Remove a series of counters used to track circuit extend attempts
11869 and connection status but that in reality we aren't using for
11870 anything other than stats logged by a SIGUSR1 signal. Closes
11873 o Documentation (man page):
11874 - The HiddenServiceVersion torrc option accepts only one number:
11875 either version 2 or 3. Closes ticket 25026; bugfix
11879 Changes in version 0.3.3.1-alpha - 2018-01-25
11880 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
11881 several new features to Tor, including several improvements to
11882 bootstrapping, and support for an experimental "vanguards" feature to
11883 resist guard discovery attacks. This series also includes better
11884 support for applications that need to embed Tor or manage v3
11887 o Major features (embedding):
11888 - There is now a documented stable API for programs that need to
11889 embed Tor. See tor_api.h for full documentation and known bugs.
11890 Closes ticket 23684.
11891 - Tor now has support for restarting in the same process.
11892 Controllers that run Tor using the "tor_api.h" interface can now
11893 restart Tor after Tor has exited. This support is incomplete,
11894 however: we fixed crash bugs that prevented it from working at
11895 all, but many bugs probably remain, including a possibility of
11896 security issues. Implements ticket 24581.
11898 o Major features (IPv6, directory documents):
11899 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
11900 consensus. This information makes it easier for IPv6 clients to
11901 bootstrap and choose reachable entry guards. Implements ticket 23826.
11902 - Add consensus method 28, which removes IPv6 ORPorts from
11903 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
11904 are redundant in microdescs. This change will be used by Tor clients
11905 on 0.2.8.x and later. (That is to say, with all Tor clients that
11906 have IPv6 bootstrap and guard support.) Implements ticket 23828.
11907 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
11908 set by different numbers of authorities. Fixes 23870
11911 o Major features (onion service v3, control port):
11912 - The control port now supports commands and events for v3 onion
11913 services. It is now possible to create ephemeral v3 services using
11914 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
11915 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
11916 DEL_ONION) have been extended to support v3 onion services. Closes
11917 ticket 20699; implements proposal 284.
11919 o Major features (onion services):
11920 - Provide torrc options to pin the second and third hops of onion
11921 service circuits to a list of nodes. The option HSLayer2Guards
11922 pins the second hop, and the option HSLayer3Guards pins the third
11923 hop. These options are for use in conjunction with experiments
11924 with "vanguards" for preventing guard enumeration attacks. Closes
11927 o Major features (rust, portability, experimental):
11928 - Tor now ships with an optional implementation of one of its
11929 smaller modules (protover.c) in the Rust programming language. To
11930 try it out, install a Rust build environment, and configure Tor
11931 with "--enable-rust --enable-cargo-online-mode". This should not
11932 cause any user-visible changes, but should help us gain more
11933 experience with Rust, and plan future Rust integration work.
11934 Implementation by Chelsea Komlo. Closes ticket 22840.
11936 o Minor features (storage, configuration):
11937 - Users can store cached directory documents somewhere other than
11938 the DataDirectory by using the CacheDirectory option. Similarly,
11939 the storage location for relay's keys can be overridden with the
11940 KeyDirectory option. Closes ticket 22703.
11942 o Major features (v3 onion services, ipv6):
11943 - When v3 onion service clients send introduce cells, they now
11944 include the IPv6 address of the rendezvous point, if it has one.
11945 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
11946 in future Tor versions, IPv6-only v3 single onion services will be
11947 able to use IPv6 addresses to connect directly to the rendezvous
11948 point. Closes ticket 23577. Patch by Neel Chauhan.
11950 o Major bugfixes (onion services, retry behavior):
11951 - Fix an "off by 2" error in counting rendezvous failures on the
11952 onion service side. While we thought we would stop the rendezvous
11953 attempt after one failed circuit, we were actually making three
11954 circuit attempts before giving up. Now switch to a default of 2,
11955 and allow the consensus parameter "hs_service_max_rdv_failures" to
11956 override. Fixes bug 24895; bugfix on 0.0.6.
11957 - New-style (v3) onion services now obey the "max rendezvous circuit
11958 attempts" logic. Previously they would make as many rendezvous
11959 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11960 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11962 o Major bugfixes (relays):
11963 - Fix a set of false positives where relays would consider
11964 connections to other relays as being client-only connections (and
11965 thus e.g. deserving different link padding schemes) if those
11966 relays fell out of the consensus briefly. Now we look only at the
11967 initial handshake and whether the connection authenticated as a
11968 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11970 o Minor feature (IPv6):
11971 - Make IPv6-only clients wait for microdescs for relays, even if we
11972 were previously using descriptors (or were using them as a bridge)
11973 and have a cached descriptor for them. Implements ticket 23827.
11974 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
11975 them, rather than waiting to download microdescriptors.
11976 Implements ticket 23827.
11978 o Minor features (cleanup):
11979 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
11980 when it stops. Closes ticket 23271.
11982 o Minor features (defensive programming):
11983 - Most of the functions in Tor that free objects have been replaced
11984 with macros that free the objects and set the corresponding
11985 pointers to NULL. This change should help prevent a large class of
11986 dangling pointer bugs. Closes ticket 24337.
11987 - Where possible, the tor_free() macro now only evaluates its input
11988 once. Part of ticket 24337.
11989 - Check that microdesc ed25519 ids are non-zero in
11990 node_get_ed25519_id() before returning them. Implements ticket
11991 24001, patch by "aruna1234".
11993 o Minor features (embedding):
11994 - Tor can now start with a preauthenticated control connection
11995 created by the process that launched it. This feature is meant for
11996 use by programs that want to launch and manage a Tor process
11997 without allowing other programs to manage it as well. For more
11998 information, see the __OwningControllerFD option documented in
11999 control-spec.txt. Closes ticket 23900.
12000 - On most errors that would cause Tor to exit, it now tries to
12001 return from the tor_main() function, rather than calling the
12002 system exit() function. Most users won't notice a difference here,
12003 but it should be significant for programs that run Tor inside
12004 a separate thread: they should now be able to survive Tor's exit
12005 conditions rather than having Tor shut down the entire process.
12006 Closes ticket 23848.
12007 - Applications that want to embed Tor can now tell Tor not to
12008 register any of its own POSIX signal handlers, using the
12009 __DisableSignalHandlers option. Closes ticket 24588.
12011 o Minor features (fallback directory list):
12012 - Avoid selecting fallbacks that change their IP addresses too
12013 often. Select more fallbacks by ignoring the Guard flag, and
12014 allowing lower cutoffs for the Running and V2Dir flags. Also allow
12015 a lower bandwidth, and a higher number of fallbacks per operator
12016 (5% of the list). Implements ticket 24785.
12017 - Update the fallback whitelist and blacklist based on opt-ins and
12018 relay changes. Closes tickets 22321, 24678, 22527, 24135,
12021 o Minor features (fallback directory mirror configuration):
12022 - Add a nickname to each fallback in a C comment. This makes it
12023 easier for operators to find their relays, and allows stem to use
12024 nicknames to identify fallbacks. Implements ticket 24600.
12025 - Add a type and version header to the fallback directory mirror
12026 file. Also add a delimiter to the end of each fallback entry. This
12027 helps external parsers like stem and Relay Search. Implements
12029 - Add an extrainfo cache flag for each fallback in a C comment. This
12030 allows stem to use fallbacks to fetch extra-info documents, rather
12031 than using authorities. Implements ticket 22759.
12032 - Add the generateFallbackDirLine.py script for automatically
12033 generating fallback directory mirror lines from relay fingerprints.
12034 No more typos! Add the lookupFallbackDirContact.py script for
12035 automatically looking up operator contact info from relay
12036 fingerprints. Implements ticket 24706, patch by teor and atagar.
12037 - Reject any fallback directory mirror that serves an expired
12038 consensus. Implements ticket 20942, patch by "minik".
12039 - Remove commas and equals signs from external string inputs to the
12040 fallback list. This avoids format confusion attacks. Implements
12042 - Remove the "weight=10" line from fallback directory mirror
12043 entries. Ticket 24681 will maintain the current fallback weights
12044 by changing Tor's default fallback weight to 10. Implements
12046 - Stop logging excessive information about fallback netblocks.
12047 Implements ticket 24791.
12049 o Minor features (forward-compatibility):
12050 - If a relay supports some link authentication protocol that we do
12051 not recognize, then include that relay's ed25519 key when telling
12052 other relays to extend to it. Previously, we treated future
12053 versions as if they were too old to support ed25519 link
12054 authentication. Closes ticket 20895.
12056 o Minor features (heartbeat):
12057 - Add onion service information to our heartbeat logs, displaying
12058 stats about the activity of configured onion services. Closes
12061 o Minor features (instrumentation, development):
12062 - Add the MainloopStats option to allow developers to get
12063 instrumentation information from the main event loop via the
12064 heartbeat messages. We hope to use this to improve Tor's behavior
12065 when it's trying to sleep. Closes ticket 24605.
12067 o Minor features (log messages):
12068 - Improve a warning message that happens when we fail to re-parse an
12069 old router because of an expired certificate. Closes ticket 20020.
12070 - Make the log more quantitative when we hit MaxMemInQueues
12071 threshold exposing some values. Closes ticket 24501.
12073 o Minor features (logging, android):
12074 - Added support for the Android logging subsystem. Closes
12077 o Minor features (performance):
12078 - Support predictive circuit building for onion service circuits
12079 with multiple layers of guards. Closes ticket 23101.
12080 - Use stdatomic.h where available, rather than mutexes, to implement
12081 atomic_counter_t. Closes ticket 23953.
12083 o Minor features (performance, 32-bit):
12084 - Improve performance on 32-bit systems by avoiding 64-bit division
12085 when calculating the timestamp in milliseconds for channel padding
12086 computations. Implements ticket 24613.
12087 - Improve performance on 32-bit systems by avoiding 64-bit division
12088 when timestamping cells and buffer chunks for OOM calculations.
12089 Implements ticket 24374.
12091 o Minor features (performance, OSX, iOS):
12092 - Use the mach_approximate_time() function (when available) to
12093 implement coarse monotonic time. Having a coarse time function
12094 should avoid a large number of system calls, and improve
12095 performance slightly, especially under load. Closes ticket 24427.
12097 o Minor features (performance, windows):
12098 - Improve performance on Windows Vista and Windows 7 by adjusting
12099 TCP send window size according to the recommendation from
12100 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
12103 o Major features (relay):
12104 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
12105 operator to use a more reasonable ("reduced") exit policy, rather
12106 than the default one. If you want to run an exit node without
12107 thinking too hard about which ports to allow, this one is for you.
12108 Closes ticket 13605. Patch from Neel Chauhan.
12110 o Minor features (testing, debugging, embedding):
12111 - For development purposes, Tor now has a mode in which it runs for
12112 a few seconds, then stops, and starts again without exiting the
12113 process. This mode is meant to help us debug various issues with
12114 ticket 23847. To use this feature, compile with
12115 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
12116 environment variable. This is expected to crash a lot, and is
12117 really meant for developers only. It will likely be removed in a
12118 future release. Implements ticket 24583.
12120 o Minor bugfix (network IPv6 test):
12121 - Tor's test scripts now check if "ping -6 ::1" works when the user
12122 runs "make test-network-all". Fixes bug 24677; bugfix on
12123 0.2.9.3-alpha. Patch by "ffmancera".
12125 o Minor bugfixes (build, rust):
12126 - Fix output of autoconf checks to display success messages for Rust
12127 dependencies and a suitable rustc compiler version. Fixes bug
12128 24612; bugfix on 0.3.1.3-alpha.
12129 - When building with Rust on OSX, link against libresolv, to work
12130 around the issue at https://github.com/rust-lang/rust/issues/46797.
12131 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
12132 - Don't pass the --quiet option to cargo: it seems to suppress some
12133 errors, which is not what we want to do when building. Fixes bug
12134 24518; bugfix on 0.3.1.7.
12135 - Build correctly when building from outside Tor's source tree with
12136 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
12139 o Minor bugfixes (directory authorities, IPv6):
12140 - When creating a routerstatus (vote) from a routerinfo (descriptor),
12141 set the IPv6 address to the unspecified IPv6 address, and
12142 explicitly initialize the port to zero. Fixes bug 24488; bugfix
12145 o Minor bugfixes (fallback directory mirrors):
12146 - Make updateFallbackDirs.py search harder for python. (Some OSs
12147 don't put it in /usr/bin.) Fixes bug 24708; bugfix
12150 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
12151 - When hibernating, close connections normally and allow them to
12152 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
12154 - Do not attempt to launch self-reachability tests when entering
12155 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12156 - Resolve several bugs related to descriptor fetching on bridge
12157 clients with bandwidth accounting enabled. (This combination is
12158 not recommended!) Fixes a case of bug 12062; bugfix
12160 - When hibernating, do not attempt to launch DNS checks. Fixes a
12161 case of bug 12062; bugfix on 0.1.2.2-alpha.
12162 - When hibernating, do not try to upload or download descriptors.
12163 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
12165 o Minor bugfixes (IPv6, bridges):
12166 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
12167 bugfix on 0.2.8.2-alpha.
12168 - Tor now sets IPv6 address in the routerstatus as well as in the
12169 router descriptors when updating addresses for a bridge. Closes
12170 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
12172 o Minor bugfixes (linux seccomp2 sandbox):
12173 - When running with the sandbox enabled, reload configuration files
12174 correctly even when %include was used. Previously we would crash.
12175 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
12177 o Minor bugfixes (memory leaks):
12178 - Avoid possible at-exit memory leaks related to use of Libevent's
12179 event_base_once() function. (This function tends to leak memory if
12180 the event_base is closed before the event fires.) Fixes bug 24584;
12181 bugfix on 0.2.8.1-alpha.
12182 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
12185 o Minor bugfixes (OSX):
12186 - Don't exit the Tor process if setrlimit() fails to change the file
12187 limit (which can happen sometimes on some versions of OSX). Fixes
12188 bug 21074; bugfix on 0.0.9pre5.
12190 o Minor bugfixes (performance, fragile-hardening):
12191 - Improve the performance of our consensus-diff application code
12192 when Tor is built with the --enable-fragile-hardening option set.
12193 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
12195 o Minor bugfixes (performance, timeouts):
12196 - Consider circuits for timeout as soon as they complete a hop. This
12197 is more accurate than applying the timeout in
12198 circuit_expire_building() because that function is only called
12199 once per second, which is now too slow for typical timeouts on the
12200 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
12201 - Use onion service circuits (and other circuits longer than 3 hops)
12202 to calculate a circuit build timeout. Previously, Tor only
12203 calculated its build timeout based on circuits that planned to be
12204 exactly 3 hops long. With this change, we include measurements
12205 from all circuits at the point where they complete their third
12206 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
12208 o Minor bugfixes (testing):
12209 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
12210 bugfix on 0.2.3.1-alpha.
12211 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
12212 25005; bugfix on 0.3.2.7-rc.
12214 o Code simplification and refactoring:
12215 - Remove /usr/athena from search path in configure.ac. Closes
12217 - Remove duplicate code in node_has_curve25519_onion_key() and
12218 node_get_curve25519_onion_key(), and add a check for a zero
12219 microdesc curve25519 onion key. Closes ticket 23966, patch by
12220 "aruna1234" and teor.
12221 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
12222 memory allocations with large numbers of OR connections (e.g.
12223 relays). Closes ticket 24119.
12224 - Separate the function that deletes ephemeral files when Tor
12226 - Small changes to Tor's buf_t API to make it suitable for use as a
12227 general-purpose safe string constructor. Closes ticket 22342.
12228 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
12229 avoid source code identifier confusion. Closes ticket 24467.
12230 - The tor_git_revision[] constant no longer needs to be redeclared
12231 by everything that links against the rest of Tor. Done as part of
12232 ticket 23845, to simplify our external API.
12233 - We make extend_info_from_node() use node_get_curve25519_onion_key()
12234 introduced in ticket 23577 to access the curve25519 public keys
12235 rather than accessing it directly. Closes ticket 23760. Patch by
12237 - Add a function to log channels' scheduler state changes to aid
12238 debugging efforts. Closes ticket 24531.
12241 - Add documentation on how to build tor with Rust dependencies
12242 without having to be online. Closes ticket 22907; bugfix
12244 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
12245 traffic. Closes ticket 24318.
12246 - Document that OutboundBindAddress doesn't apply to DNS requests.
12247 Closes ticket 22145. Patch from Aruna Maurya.
12248 - Document that operators who run more than one relay or bridge are
12249 expected to set MyFamily and ContactInfo correctly. Closes
12252 o Code simplification and refactoring (channels):
12253 - Remove the incoming and outgoing channel queues. These were never
12254 used, but still took up a step in our fast path.
12255 - The majority of the channel unit tests have been rewritten and the
12256 code coverage has now been raised to 83.6% for channel.c. Closes
12258 - Remove other dead code from the channel subsystem: All together,
12259 this cleanup has removed more than 1500 lines of code overall and
12260 adding very little except for unit test.
12262 o Code simplification and refactoring (circuit rendezvous):
12263 - Split the client-side rendezvous circuit lookup into two
12264 functions: one that returns only established circuits and another
12265 that returns all kinds of circuits. Closes ticket 23459.
12267 o Code simplification and refactoring (controller):
12268 - Make most of the variables in networkstatus_getinfo_by_purpose()
12269 const. Implements ticket 24489.
12272 Changes in version 0.3.2.9 - 2018-01-09
12273 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
12275 The 0.3.2 series includes our long-anticipated new onion service
12276 design, with numerous security features. (For more information, see
12277 our blog post at https://blog.torproject.org/fall-harvest.) We also
12278 have a new circuit scheduler algorithm for improved performance on
12279 relays everywhere (see https://blog.torproject.org/kist-and-tell),
12280 along with many smaller features and bugfixes.
12282 Per our stable release policy, we plan to support each stable release
12283 series for at least the next nine months, or for three months after
12284 the first stable release of the next series: whichever is longer. If
12285 you need a release with long-term support, we recommend that you stay
12286 with the 0.2.9 series.
12288 Below is a list of the changes since 0.3.2.8-rc. For a list of all
12289 changes since 0.3.1, see the ReleaseNotes file.
12291 o Minor features (fallback directory mirrors):
12292 - The fallback directory list has been re-generated based on the
12293 current status of the network. Tor uses fallback directories to
12294 bootstrap when it doesn't yet have up-to-date directory
12295 information. Closes ticket 24801.
12296 - Make the default DirAuthorityFallbackRate 0.1, so that clients
12297 prefer to bootstrap from fallback directory mirrors. This is a
12298 follow-up to 24679, which removed weights from the default
12299 fallbacks. Implements ticket 24681.
12301 o Minor features (geoip):
12302 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
12305 o Minor bugfixes (address selection):
12306 - When the fascist_firewall_choose_address_ functions don't find a
12307 reachable address, set the returned address to the null address
12308 and port. This is a precautionary measure, because some callers do
12309 not check the return value. Fixes bug 24736; bugfix
12312 o Minor bugfixes (compilation):
12313 - Resolve a few shadowed-variable warnings in the onion service
12314 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
12316 o Minor bugfixes (portability, msvc):
12317 - Fix a bug in the bit-counting parts of our timing-wheel code on
12318 MSVC. (Note that MSVC is still not a supported build platform, due
12319 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
12323 Changes in version 0.3.2.8-rc - 2017-12-21
12324 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
12325 schedulers that had led servers under heavy load to overload their
12326 outgoing connections. All relay operators running earlier 0.3.2.x
12327 versions should upgrade. This version also includes a mitigation for
12328 over-full DESTROY queues leading to out-of-memory conditions: if it
12329 works, we will soon backport it to earlier release series.
12331 This is the second release candidate in the 0.3.2 series. If we find
12332 no new bugs or regression here, then the first stable 0.3.2 release
12333 will be nearly identical to this.
12335 o Major bugfixes (KIST, scheduler):
12336 - The KIST scheduler did not correctly account for data already
12337 enqueued in each connection's send socket buffer, particularly in
12338 cases when the TCP/IP congestion window was reduced between
12339 scheduler calls. This situation lead to excessive per-connection
12340 buffering in the kernel, and a potential memory DoS. Fixes bug
12341 24665; bugfix on 0.3.2.1-alpha.
12343 o Minor features (geoip):
12344 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
12347 o Minor bugfixes (hidden service v3):
12348 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
12349 the probability of reaching a service for a client missing
12350 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
12352 o Minor bugfixes (memory usage):
12353 - When queuing DESTROY cells on a channel, only queue the circuit-id
12354 and reason fields: not the entire 514-byte cell. This fix should
12355 help mitigate any bugs or attacks that fill up these queues, and
12356 free more RAM for other uses. Fixes bug 24666; bugfix
12359 o Minor bugfixes (scheduler, KIST):
12360 - Use a sane write limit for KISTLite when writing onto a connection
12361 buffer instead of using INT_MAX and shoving as much as it can.
12362 Because the OOM handler cleans up circuit queues, we are better
12363 off at keeping them in that queue instead of the connection's
12364 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
12367 Changes in version 0.3.2.7-rc - 2017-12-14
12368 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
12369 including some that could affect reliability or correctness.
12371 This is the first release candidate in the 0.3.2 series. If we find no
12372 new bugs or regression here, then the first stable 0.3.2. release will
12373 be nearly identical to this.
12375 o Major bugfixes (circuit prediction):
12376 - Fix circuit prediction logic so that a client doesn't treat a port
12377 as being "handled" by a circuit if that circuit already has
12378 isolation settings on it. This change should make Tor clients more
12379 responsive by improving their chances of having a pre-created
12380 circuit ready for use when a request arrives. Fixes bug 18859;
12381 bugfix on 0.2.3.3-alpha.
12383 o Minor features (logging):
12384 - Provide better warnings when the getrandom() syscall fails. Closes
12387 o Minor features (portability):
12388 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
12389 (It doesn't yet work with the sandbox enabled.) Closes
12392 o Minor bugfixes (bridge clients, bootstrap):
12393 - Retry directory downloads when we get our first bridge descriptor
12394 during bootstrap or while reconnecting to the network. Keep
12395 retrying every time we get a bridge descriptor, until we have a
12396 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
12397 - Stop delaying bridge descriptor fetches when we have cached bridge
12398 descriptors. Instead, only delay bridge descriptor fetches when we
12399 have at least one reachable bridge. Fixes part of bug 24367;
12400 bugfix on 0.2.0.3-alpha.
12401 - Stop delaying directory fetches when we have cached bridge
12402 descriptors. Instead, only delay bridge descriptor fetches when
12403 all our bridges are definitely unreachable. Fixes part of bug
12404 24367; bugfix on 0.2.0.3-alpha.
12406 o Minor bugfixes (compilation):
12407 - Fix a signed/unsigned comparison warning introduced by our fix to
12408 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
12410 o Minor bugfixes (correctness):
12411 - Fix several places in our codebase where a C compiler would be
12412 likely to eliminate a check, based on assuming that undefined
12413 behavior had not happened elsewhere in the code. These cases are
12414 usually a sign of redundant checking or dubious arithmetic. Found
12415 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
12416 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
12419 o Minor bugfixes (onion service v3):
12420 - Fix a race where an onion service would launch a new intro circuit
12421 after closing an old one, but fail to register it before freeing
12422 the previously closed circuit. This bug was making the service
12423 unable to find the established intro circuit and thus not upload
12424 its descriptor, thus making a service unavailable for up to 24
12425 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
12427 o Minor bugfixes (scheduler, KIST):
12428 - Properly set the scheduler state of an unopened channel in the
12429 KIST scheduler main loop. This prevents a harmless but annoying
12430 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
12431 - Avoid a possible integer overflow when computing the available
12432 space on the TCP buffer of a channel. This had no security
12433 implications; but could make KIST allow too many cells on a
12434 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
12435 - Downgrade to "info" a harmless warning about the monotonic time
12436 moving backwards: This can happen on platform not supporting
12437 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12440 Changes in version 0.3.2.6-alpha - 2017-12-01
12441 This version of Tor is the latest in the 0.3.2 alpha series. It
12442 includes fixes for several important security issues. All Tor users
12443 should upgrade to this release, or to one of the other releases coming
12446 o Major bugfixes (security):
12447 - Fix a denial of service bug where an attacker could use a
12448 malformed directory object to cause a Tor instance to pause while
12449 OpenSSL would try to read a passphrase from the terminal. (Tor
12450 instances run without a terminal, which is the case for most Tor
12451 packages, are not impacted.) Fixes bug 24246; bugfix on every
12452 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12453 Found by OSS-Fuzz as testcase 6360145429790720.
12454 - Fix a denial of service issue where an attacker could crash a
12455 directory authority using a malformed router descriptor. Fixes bug
12456 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12458 - When checking for replays in the INTRODUCE1 cell data for a
12459 (legacy) onion service, correctly detect replays in the RSA-
12460 encrypted part of the cell. We were previously checking for
12461 replays on the entire cell, but those can be circumvented due to
12462 the malleability of Tor's legacy hybrid encryption. This fix helps
12463 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12464 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12467 o Major bugfixes (security, onion service v2):
12468 - Fix a use-after-free error that could crash v2 Tor onion services
12469 when they failed to open circuits while expiring introduction
12470 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12471 also tracked as TROVE-2017-013 and CVE-2017-8823.
12473 o Major bugfixes (security, relay):
12474 - When running as a relay, make sure that we never build a path
12475 through ourselves, even in the case where we have somehow lost the
12476 version of our descriptor appearing in the consensus. Fixes part
12477 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12478 as TROVE-2017-012 and CVE-2017-8822.
12479 - When running as a relay, make sure that we never choose ourselves
12480 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12481 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12483 o Minor feature (relay statistics):
12484 - Change relay bandwidth reporting stats interval from 4 hours to 24
12485 hours in order to reduce the efficiency of guard discovery
12486 attacks. Fixes ticket 23856.
12488 o Minor features (directory authority):
12489 - Add an IPv6 address for the "bastet" directory authority. Closes
12492 o Minor bugfixes (client):
12493 - By default, do not enable storage of client-side DNS values. These
12494 values were unused by default previously, but they should not have
12495 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
12498 Changes in version 0.3.1.9 - 2017-12-01:
12499 Tor 0.3.1.9 backports important security and stability fixes from the
12500 0.3.2 development series. All Tor users should upgrade to this
12501 release, or to another of the releases coming out today.
12503 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12504 - Fix a denial of service bug where an attacker could use a
12505 malformed directory object to cause a Tor instance to pause while
12506 OpenSSL would try to read a passphrase from the terminal. (Tor
12507 instances run without a terminal, which is the case for most Tor
12508 packages, are not impacted.) Fixes bug 24246; bugfix on every
12509 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12510 Found by OSS-Fuzz as testcase 6360145429790720.
12511 - Fix a denial of service issue where an attacker could crash a
12512 directory authority using a malformed router descriptor. Fixes bug
12513 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12515 - When checking for replays in the INTRODUCE1 cell data for a
12516 (legacy) onion service, correctly detect replays in the RSA-
12517 encrypted part of the cell. We were previously checking for
12518 replays on the entire cell, but those can be circumvented due to
12519 the malleability of Tor's legacy hybrid encryption. This fix helps
12520 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12521 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12524 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12525 - Fix a use-after-free error that could crash v2 Tor onion services
12526 when they failed to open circuits while expiring introduction
12527 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12528 also tracked as TROVE-2017-013 and CVE-2017-8823.
12530 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12531 - When running as a relay, make sure that we never build a path
12532 through ourselves, even in the case where we have somehow lost the
12533 version of our descriptor appearing in the consensus. Fixes part
12534 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12535 as TROVE-2017-012 and CVE-2017-8822.
12536 - When running as a relay, make sure that we never choose ourselves
12537 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12538 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12540 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12541 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12542 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12543 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12544 identifying and finding a workaround to this bug and to Moritz,
12545 Arthur Edelstein, and Roger for helping to track it down and
12548 o Minor features (bridge):
12549 - Bridges now include notice in their descriptors that they are
12550 bridges, and notice of their distribution status, based on their
12551 publication settings. Implements ticket 18329. For more fine-
12552 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12555 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12556 - Add an IPv6 address for the "bastet" directory authority. Closes
12559 o Minor features (geoip):
12560 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12563 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12564 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12565 relays, to prevent spurious address resolutions and descriptor
12566 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12567 bugfix on in 0.2.8.1-alpha.
12569 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12570 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12571 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12573 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12574 - When a circuit is marked for close, do not attempt to package any
12575 cells for channels on that circuit. Previously, we would detect
12576 this condition lower in the call stack, when we noticed that the
12577 circuit had no attached channel, and log an annoying message.
12578 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12580 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
12581 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
12582 so it matches dir-spec.txt. Fixes bug 24262; bugfix
12585 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12586 - Avoid a crash when transitioning from client mode to bridge mode.
12587 Previously, we would launch the worker threads whenever our
12588 "public server" mode changed, but not when our "server" mode
12589 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12592 Changes in version 0.3.0.13 - 2017-12-01
12593 Tor 0.3.0.13 backports important security and stability bugfixes from
12594 later Tor releases. All Tor users should upgrade to this release, or
12595 to another of the releases coming out today.
12597 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12598 2018. If you need a release with long-term support, please stick with
12599 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12601 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12602 - Fix a denial of service bug where an attacker could use a
12603 malformed directory object to cause a Tor instance to pause while
12604 OpenSSL would try to read a passphrase from the terminal. (Tor
12605 instances run without a terminal, which is the case for most Tor
12606 packages, are not impacted.) Fixes bug 24246; bugfix on every
12607 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12608 Found by OSS-Fuzz as testcase 6360145429790720.
12609 - Fix a denial of service issue where an attacker could crash a
12610 directory authority using a malformed router descriptor. Fixes bug
12611 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12613 - When checking for replays in the INTRODUCE1 cell data for a
12614 (legacy) onion service, correctly detect replays in the RSA-
12615 encrypted part of the cell. We were previously checking for
12616 replays on the entire cell, but those can be circumvented due to
12617 the malleability of Tor's legacy hybrid encryption. This fix helps
12618 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12619 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12622 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12623 - Fix a use-after-free error that could crash v2 Tor onion services
12624 when they failed to open circuits while expiring introduction
12625 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12626 also tracked as TROVE-2017-013 and CVE-2017-8823.
12628 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12629 - When running as a relay, make sure that we never build a path
12630 through ourselves, even in the case where we have somehow lost the
12631 version of our descriptor appearing in the consensus. Fixes part
12632 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12633 as TROVE-2017-012 and CVE-2017-8822.
12634 - When running as a relay, make sure that we never choose ourselves
12635 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
12636 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
12638 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12639 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12640 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12641 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12642 identifying and finding a workaround to this bug and to Moritz,
12643 Arthur Edelstein, and Roger for helping to track it down and
12646 o Minor features (security, windows, backport from 0.3.1.1-alpha):
12647 - Enable a couple of pieces of Windows hardening: one
12648 (HeapEnableTerminationOnCorruption) that has been on-by-default
12649 since Windows 8, and unavailable before Windows 7; and one
12650 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
12651 affect us, but shouldn't do any harm. Closes ticket 21953.
12653 o Minor features (bridge, backport from 0.3.1.9):
12654 - Bridges now include notice in their descriptors that they are
12655 bridges, and notice of their distribution status, based on their
12656 publication settings. Implements ticket 18329. For more fine-
12657 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12660 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12661 - Add an IPv6 address for the "bastet" directory authority. Closes
12664 o Minor features (geoip):
12665 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12668 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12669 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12670 relays, to prevent spurious address resolutions and descriptor
12671 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12672 bugfix on in 0.2.8.1-alpha.
12674 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12675 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12676 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12678 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12679 - When a circuit is marked for close, do not attempt to package any
12680 cells for channels on that circuit. Previously, we would detect
12681 this condition lower in the call stack, when we noticed that the
12682 circuit had no attached channel, and log an annoying message.
12683 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12685 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12686 - Avoid a crash when transitioning from client mode to bridge mode.
12687 Previously, we would launch the worker threads whenever our
12688 "public server" mode changed, but not when our "server" mode
12689 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12691 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
12692 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
12693 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
12696 Changes in version 0.2.9.14 - 2017-12-01
12697 Tor 0.3.0.13 backports important security and stability bugfixes from
12698 later Tor releases. All Tor users should upgrade to this release, or
12699 to another of the releases coming out today.
12701 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
12702 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12703 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12704 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12705 identifying and finding a workaround to this bug and to Moritz,
12706 Arthur Edelstein, and Roger for helping to track it down and
12709 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12710 - Fix a denial of service bug where an attacker could use a
12711 malformed directory object to cause a Tor instance to pause while
12712 OpenSSL would try to read a passphrase from the terminal. (Tor
12713 instances run without a terminal, which is the case for most Tor
12714 packages, are not impacted.) Fixes bug 24246; bugfix on every
12715 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12716 Found by OSS-Fuzz as testcase 6360145429790720.
12717 - Fix a denial of service issue where an attacker could crash a
12718 directory authority using a malformed router descriptor. Fixes bug
12719 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
12721 - When checking for replays in the INTRODUCE1 cell data for a
12722 (legacy) onion service, correctly detect replays in the RSA-
12723 encrypted part of the cell. We were previously checking for
12724 replays on the entire cell, but those can be circumvented due to
12725 the malleability of Tor's legacy hybrid encryption. This fix helps
12726 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12727 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12730 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12731 - Fix a use-after-free error that could crash v2 Tor onion services
12732 when they failed to open circuits while expiring introduction
12733 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12734 also tracked as TROVE-2017-013 and CVE-2017-8823.
12736 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12737 - When running as a relay, make sure that we never build a path
12738 through ourselves, even in the case where we have somehow lost the
12739 version of our descriptor appearing in the consensus. Fixes part
12740 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12741 as TROVE-2017-012 and CVE-2017-8822.
12743 o Minor features (bridge, backport from 0.3.1.9):
12744 - Bridges now include notice in their descriptors that they are
12745 bridges, and notice of their distribution status, based on their
12746 publication settings. Implements ticket 18329. For more fine-
12747 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12750 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12751 - Add an IPv6 address for the "bastet" directory authority. Closes
12754 o Minor features (geoip):
12755 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12758 o Minor features (security, windows, backport from 0.3.1.1-alpha):
12759 - Enable a couple of pieces of Windows hardening: one
12760 (HeapEnableTerminationOnCorruption) that has been on-by-default
12761 since Windows 8, and unavailable before Windows 7; and one
12762 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
12763 affect us, but shouldn't do any harm. Closes ticket 21953.
12765 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
12766 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12767 relays, to prevent spurious address resolutions and descriptor
12768 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12769 bugfix on in 0.2.8.1-alpha.
12771 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
12772 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
12773 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12775 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
12776 - When a circuit is marked for close, do not attempt to package any
12777 cells for channels on that circuit. Previously, we would detect
12778 this condition lower in the call stack, when we noticed that the
12779 circuit had no attached channel, and log an annoying message.
12780 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12782 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
12783 - Avoid a crash when transitioning from client mode to bridge mode.
12784 Previously, we would launch the worker threads whenever our
12785 "public server" mode changed, but not when our "server" mode
12786 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12788 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
12789 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
12790 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
12793 Changes in version 0.2.8.17 - 2017-12-01
12794 Tor 0.2.8.17 backports important security and stability bugfixes from
12795 later Tor releases. All Tor users should upgrade to this release, or
12796 to another of the releases coming out today.
12798 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
12799 2018. If you need a release with long-term support, please upgrade with
12800 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12802 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12803 - Fix a denial of service bug where an attacker could use a
12804 malformed directory object to cause a Tor instance to pause while
12805 OpenSSL would try to read a passphrase from the terminal. (Tor
12806 instances run without a terminal, which is the case for most Tor
12807 packages, are not impacted.) Fixes bug 24246; bugfix on every
12808 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12809 Found by OSS-Fuzz as testcase 6360145429790720.
12810 - When checking for replays in the INTRODUCE1 cell data for a
12811 (legacy) onion service, correctly detect replays in the RSA-
12812 encrypted part of the cell. We were previously checking for
12813 replays on the entire cell, but those can be circumvented due to
12814 the malleability of Tor's legacy hybrid encryption. This fix helps
12815 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12816 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12819 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
12820 - Fix a use-after-free error that could crash v2 Tor onion services
12821 when they failed to open circuits while expiring introduction
12822 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
12823 also tracked as TROVE-2017-013 and CVE-2017-8823.
12825 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12826 - When running as a relay, make sure that we never build a path through
12827 ourselves, even in the case where we have somehow lost the version of
12828 our descriptor appearing in the consensus. Fixes part of bug 21534;
12829 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
12832 o Minor features (bridge, backport from 0.3.1.9):
12833 - Bridges now include notice in their descriptors that they are
12834 bridges, and notice of their distribution status, based on their
12835 publication settings. Implements ticket 18329. For more fine-
12836 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12839 o Minor features (directory authority, backport from 0.3.2.6-alpha):
12840 - Add an IPv6 address for the "bastet" directory authority. Closes
12843 o Minor features (geoip):
12844 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12847 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
12848 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
12849 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
12852 Changes in version 0.2.5.16 - 2017-12-01
12853 Tor 0.2.5.13 backports important security and stability bugfixes from
12854 later Tor releases. All Tor users should upgrade to this release, or
12855 to another of the releases coming out today.
12857 Note: the Tor 0.2.5 series will no longer be supported after 1 May
12858 2018. If you need a release with long-term support, please upgrade to
12859 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12861 o Major bugfixes (security, backport from 0.3.2.6-alpha):
12862 - Fix a denial of service bug where an attacker could use a
12863 malformed directory object to cause a Tor instance to pause while
12864 OpenSSL would try to read a passphrase from the terminal. (Tor
12865 instances run without a terminal, which is the case for most Tor
12866 packages, are not impacted.) Fixes bug 24246; bugfix on every
12867 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
12868 Found by OSS-Fuzz as testcase 6360145429790720.
12869 - When checking for replays in the INTRODUCE1 cell data for a
12870 (legacy) onion service, correctly detect replays in the RSA-
12871 encrypted part of the cell. We were previously checking for
12872 replays on the entire cell, but those can be circumvented due to
12873 the malleability of Tor's legacy hybrid encryption. This fix helps
12874 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
12875 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
12878 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
12879 - When running as a relay, make sure that we never build a path
12880 through ourselves, even in the case where we have somehow lost the
12881 version of our descriptor appearing in the consensus. Fixes part
12882 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
12883 as TROVE-2017-012 and CVE-2017-8822.
12885 o Minor features (bridge, backport from 0.3.1.9):
12886 - Bridges now include notice in their descriptors that they are
12887 bridges, and notice of their distribution status, based on their
12888 publication settings. Implements ticket 18329. For more fine-
12889 grained control of how a bridge is distributed, upgrade to 0.3.2.x
12892 o Minor features (geoip):
12893 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12897 Changes in version 0.3.2.5-alpha - 2017-11-22
12898 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
12899 fixes several stability and reliability bugs, including a fix for
12900 intermittent bootstrapping failures that some people have been seeing
12901 since the 0.3.0.x series.
12903 Please test this alpha out -- many of these fixes will soon be
12904 backported to stable Tor versions if no additional bugs are found
12907 o Major bugfixes (bootstrapping):
12908 - Fetch descriptors aggressively whenever we lack enough to build
12909 circuits, regardless of how many descriptors we are missing.
12910 Previously, we would delay launching the fetch when we had fewer
12911 than 15 missing descriptors, even if some of those descriptors
12912 were blocking circuits from building. Fixes bug 23985; bugfix on
12913 0.1.1.11-alpha. The effects of this bug became worse in
12914 0.3.0.3-alpha, when we began treating missing descriptors from our
12915 primary guards as a reason to delay circuits.
12916 - Don't try fetching microdescriptors from relays that have failed
12917 to deliver them in the past. Fixes bug 23817; bugfix
12920 o Minor features (directory authority):
12921 - Make the "Exit" flag assignment only depend on whether the exit
12922 policy allows connections to ports 80 and 443. Previously relays
12923 would get the Exit flag if they allowed connections to one of
12924 these ports and also port 6667. Resolves ticket 23637.
12926 o Minor features (geoip):
12927 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12930 o Minor features (linux seccomp2 sandbox):
12931 - Update the sandbox rules so that they should now work correctly
12932 with Glibc 2.26. Closes ticket 24315.
12934 o Minor features (logging):
12935 - Downgrade a pair of log messages that could occur when an exit's
12936 resolver gave us an unusual (but not forbidden) response. Closes
12938 - Improve the message we log when re-enabling circuit build timeouts
12939 after having received a consensus. Closes ticket 20963.
12941 o Minor bugfixes (compilation):
12942 - Fix a memory leak warning in one of the libevent-related
12943 configuration tests that could occur when manually specifying
12944 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
12945 Found and patched by Alex Xu.
12946 - When detecting OpenSSL on Windows from our configure script, make
12947 sure to try linking with the ws2_32 library. Fixes bug 23783;
12948 bugfix on 0.3.2.2-alpha.
12950 o Minor bugfixes (control port, linux seccomp2 sandbox):
12951 - Avoid a crash when attempting to use the seccomp2 sandbox together
12952 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12955 o Minor bugfixes (control port, onion services):
12956 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
12957 HS_DESC event when a service is not able to upload a descriptor.
12958 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
12960 o Minor bugfixes (directory cache):
12961 - Recover better from empty or corrupt files in the consensus cache
12962 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
12963 - When a consensus diff calculation is only partially successful,
12964 only record the successful parts as having succeeded. Partial
12965 success can happen if (for example) one compression method fails
12966 but the others succeed. Previously we misrecorded all the
12967 calculations as having succeeded, which would later cause a
12968 nonfatal assertion failure. Fixes bug 24086; bugfix
12971 o Minor bugfixes (logging):
12972 - Only log once if we notice that KIST support is gone. Fixes bug
12973 24158; bugfix on 0.3.2.1-alpha.
12974 - Suppress a log notice when relay descriptors arrive. We already
12975 have a bootstrap progress for this so no need to log notice
12976 everytime tor receives relay descriptors. Microdescriptors behave
12977 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
12979 o Minor bugfixes (network layer):
12980 - When closing a connection via close_connection_immediately(), we
12981 mark it as "not blocked on bandwidth", to prevent later calls from
12982 trying to unblock it, and give it permission to read. This fixes a
12983 backtrace warning that can happen on relays under various
12984 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12986 o Minor bugfixes (onion services):
12987 - The introduction circuit was being timed out too quickly while
12988 waiting for the rendezvous circuit to complete. Keep the intro
12989 circuit around longer instead of timing out and reopening new ones
12990 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
12991 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
12992 so it matches dir-spec.txt. Fixes bug 24262; bugfix
12994 - Silence a warning about failed v3 onion descriptor uploads that
12995 can happen naturally under certain edge cases. Fixes part of bug
12996 23662; bugfix on 0.3.2.1-alpha.
12998 o Minor bugfixes (tests):
12999 - Fix a memory leak in one of the bridge-distribution test cases.
13000 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
13001 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
13002 to correctly handle cases where a caller gives it an RSA key of
13003 under 160 bits. (This is not actually a bug in Tor itself, but
13004 rather in our fuzzing code.) Fixes bug 24247; bugfix on
13005 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
13008 - Add notes in man page regarding OS support for the various
13009 scheduler types. Attempt to use less jargon in the scheduler
13010 section. Closes ticket 24254.
13013 Changes in version 0.3.2.4-alpha - 2017-11-08
13014 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
13015 It fixes several stability and reliability bugs, especially including
13016 a major reliability issue that has been plaguing fast exit relays in
13019 o Major bugfixes (exit relays, DNS):
13020 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
13021 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
13022 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
13023 identifying and finding a workaround to this bug and to Moritz,
13024 Arthur Edelstein, and Roger for helping to track it down and
13027 o Major bugfixes (scheduler, channel):
13028 - Stop processing scheduled channels if they closed while flushing
13029 cells. This can happen if the write on the connection fails
13030 leading to the channel being closed while in the scheduler loop.
13031 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
13033 o Minor features (logging, scheduler):
13034 - Introduce a SCHED_BUG() function to log extra information about
13035 the scheduler state if we ever catch a bug in the scheduler.
13036 Closes ticket 23753.
13038 o Minor features (removed deprecations):
13039 - The ClientDNSRejectInternalAddresses flag can once again be set in
13040 non-testing Tor networks, so long as they do not use the default
13041 directory authorities. This change also removes the deprecation of
13042 this flag from 0.2.9.2-alpha. Closes ticket 21031.
13044 o Minor features (testing):
13045 - Our fuzzing tests now test the encrypted portions of v3 onion
13046 service descriptors. Implements more of 21509.
13048 o Minor bugfixes (directory client):
13049 - On failure to download directory information, delay retry attempts
13050 by a random amount based on the "decorrelated jitter" algorithm.
13051 Our previous delay algorithm tended to produce extra-long delays
13052 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
13054 o Minor bugfixes (IPv6, v3 single onion services):
13055 - Remove buggy code for IPv6-only v3 single onion services, and
13056 reject attempts to configure them. This release supports IPv4,
13057 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
13058 stack v3 single onion services. Fixes bug 23820; bugfix
13061 o Minor bugfixes (logging, relay):
13062 - Give only a protocol warning when the ed25519 key is not
13063 consistent between the descriptor and microdescriptor of a relay.
13064 This can happen, for instance, if the relay has been flagged
13065 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
13067 o Minor bugfixes (manpage, onion service):
13068 - Document that the HiddenServiceNumIntroductionPoints option is
13069 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
13070 bugfix on 0.3.2.1-alpha.
13072 o Minor bugfixes (memory leaks):
13073 - Fix a minor memory leak at exit in the KIST scheduler. This bug
13074 should have no user-visible impact. Fixes bug 23774; bugfix
13076 - Fix a memory leak when decrypting a badly formatted v3 onion
13077 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
13078 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
13080 o Minor bugfixes (onion services):
13081 - Cache some needed onion service client information instead of
13082 constantly computing it over and over again. Fixes bug 23623;
13083 bugfix on 0.3.2.1-alpha.
13084 - Properly retry HSv3 descriptor fetches when missing required
13085 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
13087 o Minor bugfixes (path selection):
13088 - When selecting relays by bandwidth, avoid a rounding error that
13089 could sometimes cause load to be imbalanced incorrectly.
13090 Previously, we would always round upwards; now, we round towards
13091 the nearest integer. This had the biggest effect when a relay's
13092 weight adjustments should have given it weight 0, but it got
13093 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
13094 - When calculating the fraction of nodes that have descriptors, and
13095 all nodes in the network have zero bandwidths, count the number of
13096 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
13097 - Actually log the total bandwidth in compute_weighted_bandwidths().
13098 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
13100 o Minor bugfixes (relay, crash):
13101 - Avoid a crash when transitioning from client mode to bridge mode.
13102 Previously, we would launch the worker threads whenever our
13103 "public server" mode changed, but not when our "server" mode
13104 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
13106 o Minor bugfixes (testing):
13107 - Fix a spurious fuzzing-only use of an uninitialized value. Found
13108 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
13109 - Test that IPv6-only clients can use microdescriptors when running
13110 "make test-network-all". Requires chutney master 61c28b9 or later.
13111 Closes ticket 24109.
13114 Changes in version 0.3.2.3-alpha - 2017-10-27
13115 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
13116 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
13117 directory authority, Bastet.
13119 o Directory authority changes:
13120 - Add "Bastet" as a ninth directory authority to the default list.
13121 Closes ticket 23910.
13122 - The directory authority "Longclaw" has changed its IP address.
13123 Closes ticket 23592.
13125 o Minor features (bridge):
13126 - Bridge relays can now set the BridgeDistribution config option to
13127 add a "bridge-distribution-request" line to their bridge
13128 descriptor, which tells BridgeDB how they'd like their bridge
13129 address to be given out. (Note that as of Oct 2017, BridgeDB does
13130 not yet implement this feature.) As a side benefit, this feature
13131 provides a way to distinguish bridge descriptors from non-bridge
13132 descriptors. Implements tickets 18329.
13134 o Minor features (client, entry guards):
13135 - Improve log messages when missing descriptors for primary guards.
13136 Resolves ticket 23670.
13138 o Minor features (geoip):
13139 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13142 o Minor bugfixes (bridge):
13143 - Overwrite the bridge address earlier in the process of retrieving
13144 its descriptor, to make sure we reach it on the configured
13145 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
13147 o Minor bugfixes (documentation):
13148 - Document better how to read gcov, and what our gcov postprocessing
13149 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
13151 o Minor bugfixes (entry guards):
13152 - Tor now updates its guard state when it reads a consensus
13153 regardless of whether it's missing descriptors. That makes tor use
13154 its primary guards to fetch descriptors in some edge cases where
13155 it would previously have used fallback directories. Fixes bug
13156 23862; bugfix on 0.3.0.1-alpha.
13158 o Minor bugfixes (hidden service client):
13159 - When handling multiple SOCKS request for the same .onion address,
13160 only fetch the service descriptor once.
13161 - When a descriptor fetch fails with a non-recoverable error, close
13162 all pending SOCKS requests for that .onion. Fixes bug 23653;
13163 bugfix on 0.3.2.1-alpha.
13165 o Minor bugfixes (hidden service):
13166 - Always regenerate missing hidden service public key files. Prior
13167 to this, if the public key was deleted from disk, it wouldn't get
13168 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
13170 - Make sure that we have a usable ed25519 key when the intro point
13171 relay supports ed25519 link authentication. Fixes bug 24002;
13172 bugfix on 0.3.2.1-alpha.
13174 o Minor bugfixes (hidden service, v2):
13175 - When reloading configured hidden services, copy all information
13176 from the old service object. Previously, some data was omitted,
13177 causing delays in descriptor upload, and other bugs. Fixes bug
13178 23790; bugfix on 0.2.1.9-alpha.
13180 o Minor bugfixes (memory safety, defensive programming):
13181 - Clear the target address when node_get_prim_orport() returns
13182 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13184 o Minor bugfixes (relay):
13185 - Avoid a BUG warning when receiving a dubious CREATE cell while an
13186 option transition is in progress. Fixes bug 23952; bugfix
13189 o Minor bugfixes (testing):
13190 - Adjust the GitLab CI configuration to more closely match that of
13191 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
13192 - Prevent scripts/test/coverage from attempting to move gcov output
13193 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
13194 - When running unit tests as root, skip a test that would fail
13195 because it expects a permissions error. This affects some
13196 continuous integration setups. Fixes bug 23758; bugfix
13198 - Stop unconditionally mirroring the tor repository in GitLab CI.
13199 This prevented developers from enabling GitLab CI on master. Fixes
13200 bug 23755; bugfix on 0.3.2.2-alpha.
13201 - Fix the hidden service v3 descriptor decoding fuzzing to use the
13202 latest decoding API correctly. Fixes bug 21509; bugfix
13205 o Minor bugfixes (warnings):
13206 - When we get an HTTP request on a SOCKS port, tell the user about
13207 the new HTTPTunnelPort option. Previously, we would give a "Tor is
13208 not an HTTP Proxy" message, which stopped being true when
13209 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
13213 Changes in version 0.2.5.15 - 2017-10-25
13214 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
13215 series. It also adds a new directory authority, Bastet.
13217 Note: the Tor 0.2.5 series will no longer be supported after 1 May
13218 2018. If you need a release with long-term support, please upgrade to
13219 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13221 o Directory authority changes:
13222 - Add "Bastet" as a ninth directory authority to the default list.
13223 Closes ticket 23910.
13224 - The directory authority "Longclaw" has changed its IP address.
13225 Closes ticket 23592.
13227 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13228 - Avoid an assertion failure bug affecting our implementation of
13229 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13230 handling of "0xx" differs from what we had expected. Fixes bug
13231 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13233 o Minor features (geoip):
13234 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13237 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13238 - Fix a memset() off the end of an array when packing cells. This
13239 bug should be harmless in practice, since the corrupted bytes are
13240 still in the same structure, and are always padding bytes,
13241 ignored, or immediately overwritten, depending on compiler
13242 behavior. Nevertheless, because the memset()'s purpose is to make
13243 sure that any other cell-handling bugs can't expose bytes to the
13244 network, we need to fix it. Fixes bug 22737; bugfix on
13245 0.2.4.11-alpha. Fixes CID 1401591.
13247 o Build features (backport from 0.3.1.5-alpha):
13248 - Tor's repository now includes a Travis Continuous Integration (CI)
13249 configuration file (.travis.yml). This is meant to help new
13250 developers and contributors who fork Tor to a Github repository be
13251 better able to test their changes, and understand what we expect
13252 to pass. To use this new build feature, you must fork Tor to your
13253 Github account, then go into the "Integrations" menu in the
13254 repository settings for your fork and enable Travis, then push
13255 your changes. Closes ticket 22636.
13258 Changes in version 0.2.8.16 - 2017-10-25
13259 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
13260 series, including a bugfix for a crash issue that had affected relays
13261 under memory pressure. It also adds a new directory authority, Bastet.
13263 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
13264 2018. If you need a release with long-term support, please stick with
13265 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13267 o Directory authority changes:
13268 - Add "Bastet" as a ninth directory authority to the default list.
13269 Closes ticket 23910.
13270 - The directory authority "Longclaw" has changed its IP address.
13271 Closes ticket 23592.
13273 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13274 - Fix a timing-based assertion failure that could occur when the
13275 circuit out-of-memory handler freed a connection's output buffer.
13276 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13278 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13279 - Remove longclaw's IPv6 address, as it will soon change. Authority
13280 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13281 3/8 directory authorities with IPv6 addresses, but there are also
13282 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13284 o Minor features (geoip):
13285 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13289 Changes in version 0.2.9.13 - 2017-10-25
13290 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
13291 series, including a bugfix for a crash issue that had affected relays
13292 under memory pressure. It also adds a new directory authority, Bastet.
13294 o Directory authority changes:
13295 - Add "Bastet" as a ninth directory authority to the default list.
13296 Closes ticket 23910.
13297 - The directory authority "Longclaw" has changed its IP address.
13298 Closes ticket 23592.
13300 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13301 - Fix a timing-based assertion failure that could occur when the
13302 circuit out-of-memory handler freed a connection's output buffer.
13303 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13305 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13306 - Remove longclaw's IPv6 address, as it will soon change. Authority
13307 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13308 3/8 directory authorities with IPv6 addresses, but there are also
13309 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13311 o Minor features (geoip):
13312 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13315 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13316 - When a directory authority rejects a descriptor or extrainfo with
13317 a given digest, mark that digest as undownloadable, so that we do
13318 not attempt to download it again over and over. We previously
13319 tried to avoid downloading such descriptors by other means, but we
13320 didn't notice if we accidentally downloaded one anyway. This
13321 behavior became problematic in 0.2.7.2-alpha, when authorities
13322 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13325 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13326 - Clear the address when node_get_prim_orport() returns early.
13327 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13329 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13330 - When running as a Windows service, set the ID of the main thread
13331 correctly. Failure to do so made us fail to send log messages to
13332 the controller in 0.2.1.16-rc, slowed down controller event
13333 delivery in 0.2.7.3-rc and later, and crash with an assertion
13334 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13335 Patch and diagnosis from "Vort".
13338 Changes in version 0.3.0.12 - 2017-10-25
13339 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
13340 series, including a bugfix for a crash issue that had affected relays
13341 under memory pressure. It also adds a new directory authority, Bastet.
13343 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
13344 2018. If you need a release with long-term support, please stick with
13345 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
13347 o Directory authority changes:
13348 - Add "Bastet" as a ninth directory authority to the default list.
13349 Closes ticket 23910.
13350 - The directory authority "Longclaw" has changed its IP address.
13351 Closes ticket 23592.
13353 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13354 - Fix a timing-based assertion failure that could occur when the
13355 circuit out-of-memory handler freed a connection's output buffer.
13356 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13358 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13359 - Remove longclaw's IPv6 address, as it will soon change. Authority
13360 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13361 3/8 directory authorities with IPv6 addresses, but there are also
13362 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13364 o Minor features (geoip):
13365 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13368 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
13369 - When a directory authority rejects a descriptor or extrainfo with
13370 a given digest, mark that digest as undownloadable, so that we do
13371 not attempt to download it again over and over. We previously
13372 tried to avoid downloading such descriptors by other means, but we
13373 didn't notice if we accidentally downloaded one anyway. This
13374 behavior became problematic in 0.2.7.2-alpha, when authorities
13375 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13378 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13379 - Avoid a possible double close of a circuit by the intro point on
13380 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13381 bugfix on 0.3.0.1-alpha.
13383 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13384 - Clear the address when node_get_prim_orport() returns early.
13385 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13387 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
13388 - When running as a Windows service, set the ID of the main thread
13389 correctly. Failure to do so made us fail to send log messages to
13390 the controller in 0.2.1.16-rc, slowed down controller event
13391 delivery in 0.2.7.3-rc and later, and crash with an assertion
13392 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13393 Patch and diagnosis from "Vort".
13396 Changes in version 0.3.1.8 - 2017-10-25
13397 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
13398 It includes several bugfixes, including a bugfix for a crash issue
13399 that had affected relays under memory pressure. It also adds
13400 a new directory authority, Bastet.
13402 o Directory authority changes:
13403 - Add "Bastet" as a ninth directory authority to the default list.
13404 Closes ticket 23910.
13405 - The directory authority "Longclaw" has changed its IP address.
13406 Closes ticket 23592.
13408 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
13409 - Fix a timing-based assertion failure that could occur when the
13410 circuit out-of-memory handler freed a connection's output buffer.
13411 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13413 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
13414 - Remove longclaw's IPv6 address, as it will soon change. Authority
13415 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13416 3/8 directory authorities with IPv6 addresses, but there are also
13417 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13419 o Minor features (geoip):
13420 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
13423 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
13424 - Fix a compilation warning when building with zstd support on
13425 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13426 and fixed by Andreas Stieger.
13428 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
13429 - Handle a pathological case when decompressing Zstandard data when
13430 the output buffer size is zero. Fixes bug 23551; bugfix
13433 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
13434 - Remove the length limit on HTTP status lines that authorities can
13435 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
13437 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
13438 - Avoid a possible double close of a circuit by the intro point on
13439 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13440 bugfix on 0.3.0.1-alpha.
13442 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
13443 - Clear the address when node_get_prim_orport() returns early.
13444 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
13446 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
13447 - Fix additional channelpadding unit test failures by using mocked
13448 time instead of actual time for all tests. Fixes bug 23608; bugfix
13452 Changes in version 0.3.2.2-alpha - 2017-09-29
13453 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
13454 release fixes several minor bugs in the new scheduler and next-
13455 generation onion services; both features were newly added in the 0.3.2
13456 series. Other fixes in this alpha include several fixes for non-fatal
13457 tracebacks which would appear in logs.
13459 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
13460 alpha does not contain any substantial new features. Minor features
13461 include better testing and logging.
13463 The following comprises the complete list of changes included
13466 o Major bugfixes (relay, crash, assertion failure):
13467 - Fix a timing-based assertion failure that could occur when the
13468 circuit out-of-memory handler freed a connection's output buffer.
13469 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
13471 o Major bugfixes (scheduler):
13472 - If a channel is put into the scheduler's pending list, then it
13473 starts closing, and then if the scheduler runs before it finishes
13474 closing, the scheduler will get stuck trying to flush its cells
13475 while the lower layers refuse to cooperate. Fix that race
13476 condition by giving the scheduler an escape method. Fixes bug
13477 23676; bugfix on 0.3.2.1-alpha.
13479 o Minor features (build, compilation):
13480 - The "check-changes" feature is now part of the "make check" tests;
13481 we'll use it to try to prevent misformed changes files from
13482 accumulating. Closes ticket 23564.
13483 - Tor builds should now fail if there are any mismatches between the
13484 C type representing a configuration variable and the C type the
13485 data-driven parser uses to store a value there. Previously, we
13486 needed to check these by hand, which sometimes led to mistakes.
13487 Closes ticket 23643.
13489 o Minor features (directory authorities):
13490 - Remove longclaw's IPv6 address, as it will soon change. Authority
13491 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
13492 3/8 directory authorities with IPv6 addresses, but there are also
13493 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
13495 o Minor features (hidden service, circuit, logging):
13496 - Improve logging of many callsite in the circuit subsystem to print
13497 the circuit identifier(s).
13498 - Log when we cleanup an intro point from a service so we know when
13499 and for what reason it happened. Closes ticket 23604.
13501 o Minor features (logging):
13502 - Log more circuit information whenever we are about to try to
13503 package a relay cell on a circuit with a nonexistent n_chan.
13504 Attempt to diagnose ticket 8185.
13505 - Improve info-level log identification of particular circuits, to
13506 help with debugging. Closes ticket 23645.
13508 o Minor features (relay):
13509 - When choosing which circuits can be expired as unused, consider
13510 circuits from clients even if those clients used regular CREATE
13511 cells to make them; and do not consider circuits from relays even
13512 if they were made with CREATE_FAST. Part of ticket 22805.
13514 o Minor features (robustness):
13515 - Change several fatal assertions when flushing buffers into non-
13516 fatal assertions, to prevent any recurrence of 23690.
13518 o Minor features (spec conformance, bridge, diagnostic):
13519 - When handling the USERADDR command on an ExtOrPort, warn when the
13520 transports provides a USERADDR with no port. In a future version,
13521 USERADDR commands of this format may be rejected. Detects problems
13522 related to ticket 23080.
13524 o Minor features (testing):
13525 - Add a unit test to make sure that our own generated platform
13526 string will be accepted by directory authorities. Closes
13529 o Minor bugfixes (bootstrapping):
13530 - When warning about state file clock skew, report the correct
13531 direction for the detected skew. Fixes bug 23606; bugfix
13533 - Avoid an assertion failure when logging a state file clock skew
13534 very early in bootstrapping. Fixes bug 23607; bugfix
13537 o Minor bugfixes (build, compilation):
13538 - Fix a compilation warning when building with zstd support on
13539 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
13540 and fixed by Andreas Stieger.
13541 - When searching for OpenSSL, don't accept any OpenSSL library that
13542 lacks TLSv1_1_method(): Tor doesn't build with those versions.
13543 Additionally, look in /usr/local/opt/openssl, if it's present.
13544 These changes together repair the default build on OSX systems
13545 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
13547 o Minor bugfixes (compression):
13548 - Handle a pathological case when decompressing Zstandard data when
13549 the output buffer size is zero. Fixes bug 23551; bugfix
13552 o Minor bugfixes (documentation):
13553 - Fix manpage to not refer to the obsolete (and misspelled)
13554 UseEntryGuardsAsDirectoryGuards parameter in the description of
13555 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
13557 o Minor bugfixes (hidden service v3):
13558 - Don't log an assertion failure when we can't find the right
13559 information to extend to an introduction point. In rare cases,
13560 this could happen, causing a warning, even though tor would
13561 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
13562 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
13563 much bigger so the rendezvous point can't distinguish which hidden
13564 service protocol is being used. Fixes bug 23420; bugfix
13567 o Minor bugfixes (hidden service, relay):
13568 - Avoid a possible double close of a circuit by the intro point on
13569 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
13570 bugfix on 0.3.0.1-alpha.
13572 o Minor bugfixes (logging, relay shutdown, annoyance):
13573 - When a circuit is marked for close, do not attempt to package any
13574 cells for channels on that circuit. Previously, we would detect
13575 this condition lower in the call stack, when we noticed that the
13576 circuit had no attached channel, and log an annoying message.
13577 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
13579 o Minor bugfixes (scheduler):
13580 - When switching schedulers due to a consensus change, we didn't
13581 give the new scheduler a chance to react to the consensus. Fix
13582 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
13583 - Make the KISTSchedRunInterval option a non negative value. With
13584 this, the way to disable KIST through the consensus is to set it
13585 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
13586 - Only notice log the selected scheduler when we switch scheduler
13587 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
13588 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
13589 by a different tv_usec data type. Fixes bug 23575; bugfix
13591 - Make a hard exit if tor is unable to pick a scheduler which can
13592 happen if the user specifies a scheduler type that is not
13593 supported and not other types in Schedulers. Fixes bug 23581;
13594 bugfix on 0.3.2.1-alpha.
13595 - Properly initialize the scheduler last run time counter so it is
13596 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
13598 o Minor bugfixes (testing):
13599 - Capture and detect several "Result does not fit" warnings in unit
13600 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
13602 - Fix additional channelpadding unit test failures by using mocked
13603 time instead of actual time for all tests. Fixes bug 23608; bugfix
13605 - The removal of some old scheduler options caused some tests to
13606 fail on BSD systems. Assume current behavior is correct and make
13607 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
13609 o Code simplification and refactoring:
13610 - Remove various ways of testing circuits and connections for
13611 "clientness"; instead, favor channel_is_client(). Part of
13614 o Deprecated features:
13615 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
13616 now deprecated; they do not apply to relays, and they have had no
13617 effect on clients since 0.2.8.x. Closes ticket 19704.
13620 - HiddenServiceVersion man page entry wasn't mentioning the now
13621 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
13622 - Clarify that the Address option is entirely about setting an
13623 advertised IPv4 address. Closes ticket 18891.
13624 - Clarify the manpage's use of the term "address" to clarify what
13625 kind of address is intended. Closes ticket 21405.
13626 - Document that onion service subdomains are allowed, and ignored.
13627 Closes ticket 18736.
13630 Changes in version 0.3.2.1-alpha - 2017-09-18
13631 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
13632 includes support for our next-generation ("v3") onion service
13633 protocol, and adds a new circuit scheduler for more responsive
13634 forwarding decisions from relays. There are also numerous other small
13635 features and bugfixes here.
13637 Below are the changes since Tor 0.3.1.7.
13639 o Major feature (scheduler, channel):
13640 - Tor now uses new schedulers to decide which circuits should
13641 deliver cells first, in order to improve congestion at relays. The
13642 first type is called "KIST" ("Kernel Informed Socket Transport"),
13643 and is only available on Linux-like systems: it uses feedback from
13644 the kernel to prevent the kernel's TCP buffers from growing too
13645 full. The second new scheduler type is called "KISTLite": it
13646 behaves the same as KIST, but runs on systems without kernel
13647 support for inspecting TCP implementation details. The old
13648 scheduler is still available, under the name "Vanilla". To change
13649 the default scheduler preference order, use the new "Schedulers"
13650 option. (The default preference order is "KIST,KISTLite,Vanilla".)
13652 Matt Traudt implemented KIST, based on research by Rob Jansen,
13653 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
13654 more information, see the design paper at
13655 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
13656 followup implementation paper at https://arxiv.org/abs/1709.01044.
13657 Closes ticket 12541.
13659 o Major features (next-generation onion services):
13660 - Tor now supports the next-generation onion services protocol for
13661 clients and services! As part of this release, the core of
13662 proposal 224 has been implemented and is available for
13663 experimentation and testing by our users. This newer version of
13664 onion services ("v3") features many improvements over the legacy
13667 a) Better crypto (replaced SHA1/DH/RSA1024
13668 with SHA3/ed25519/curve25519)
13670 b) Improved directory protocol, leaking much less information to
13673 c) Improved directory protocol, with smaller surface for
13676 d) Better onion address security against impersonation.
13678 e) More extensible introduction/rendezvous protocol.
13680 f) A cleaner and more modular codebase.
13682 You can identify a next-generation onion address by its length:
13683 they are 56 characters long, as in
13684 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
13686 In the future, we will release more options and features for v3
13687 onion services, but we first need a testing period, so that the
13688 current codebase matures and becomes more robust. Planned features
13689 include: offline keys, advanced client authorization, improved
13690 guard algorithms, and statistics. For full details, see
13693 Legacy ("v2") onion services will still work for the foreseeable
13694 future, and will remain the default until this new codebase gets
13695 tested and hardened. Service operators who want to experiment with
13696 the new system can use the 'HiddenServiceVersion 3' torrc
13697 directive along with the regular onion service configuration
13698 options. We will publish a blog post about this new feature
13701 o Major bugfixes (usability, control port):
13702 - Report trusted clock skew indications as bootstrap errors, so
13703 controllers can more easily alert users when their clocks are
13704 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
13706 o Minor features (bug detection):
13707 - Log a warning message with a stack trace for any attempt to call
13708 get_options() during option validation. This pattern has caused
13709 subtle bugs in the past. Closes ticket 22281.
13711 o Minor features (client):
13712 - You can now use Tor as a tunneled HTTP proxy: use the new
13713 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
13714 requests. Closes ticket 22407.
13715 - Add an extra check to make sure that we always use the newer guard
13716 selection code for picking our guards. Closes ticket 22779.
13717 - When downloading (micro)descriptors, don't split the list into
13718 multiple requests unless we want at least 32 descriptors.
13719 Previously, we split at 4, not 32, which led to significant
13720 overhead in HTTP request size and degradation in compression
13721 performance. Closes ticket 23220.
13723 o Minor features (command line):
13724 - Add a new commandline option, --key-expiration, which prints when
13725 the current signing key is going to expire. Implements ticket
13726 17639; patch by Isis Lovecruft.
13728 o Minor features (control port):
13729 - If an application tries to use the control port as an HTTP proxy,
13730 respond with a meaningful "This is the Tor control port" message,
13731 and log the event. Closes ticket 1667. Patch from Ravi
13733 - Provide better error message for GETINFO desc/(id|name) when not
13734 fetching router descriptors. Closes ticket 5847. Patch by
13736 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
13737 whether Tor will try to download router descriptors and
13738 microdescriptors respectively. Closes ticket 22684.
13739 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
13740 so controllers can tell whether the geoip databases are loaded.
13741 Closes ticket 23237.
13742 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
13743 events. Closes ticket 19254. Patch by "DonnchaC".
13745 o Minor features (development support):
13746 - Developers can now generate a call-graph for Tor using the
13747 "calltool" python program, which post-processes object dumps. It
13748 should work okay on many Linux and OSX platforms, and might work
13749 elsewhere too. To run it, install calltool from
13750 https://gitweb.torproject.org/user/nickm/calltool.git and run
13751 "make callgraph". Closes ticket 19307.
13753 o Minor features (ed25519):
13754 - Add validation function to checks for torsion components in
13755 ed25519 public keys, used by prop224 client-side code. Closes
13756 ticket 22006. Math help by Ian Goldberg.
13758 o Minor features (exit relay, DNS):
13759 - Improve the clarity and safety of the log message from evdns when
13760 receiving an apparently spoofed DNS reply. Closes ticket 3056.
13762 o Minor features (integration, hardening):
13763 - Add a new NoExec option to prevent Tor from running other
13764 programs. When this option is set to 1, Tor will never try to run
13765 another program, regardless of the settings of
13766 PortForwardingHelper, ClientTransportPlugin, or
13767 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
13768 without restarting Tor. Closes ticket 22976.
13770 o Minor features (logging):
13771 - Improve the warning message for specifying a relay by nickname.
13772 The previous message implied that nickname registration was still
13773 part of the Tor network design, which it isn't. Closes
13775 - If the sandbox filter fails to load, suggest to the user that
13776 their kernel might not support seccomp2. Closes ticket 23090.
13778 o Minor features (portability):
13779 - Check at configure time whether uint8_t is the same type as
13780 unsigned char. Lots of existing code already makes this
13781 assumption, and there could be strict aliasing issues if the
13782 assumption is violated. Closes ticket 22410.
13784 o Minor features (relay, configuration):
13785 - Reject attempts to use relative file paths when RunAsDaemon is
13786 set. Previously, Tor would accept these, but the directory-
13787 changing step of RunAsDaemon would give strange and/or confusing
13788 results. Closes ticket 22731.
13790 o Minor features (startup, safety):
13791 - When configured to write a PID file, Tor now exits if it is unable
13792 to do so. Previously, it would warn and continue. Closes
13795 o Minor features (static analysis):
13796 - The BUG() macro has been changed slightly so that Coverity no
13797 longer complains about dead code if the bug is impossible. Closes
13800 o Minor features (testing):
13801 - The default chutney network tests now include tests for the v3
13802 hidden service design. Make sure you have the latest version of
13803 chutney if you want to run these. Closes ticket 22437.
13804 - Add a unit test to verify that we can parse a hardcoded v2 hidden
13805 service descriptor. Closes ticket 15554.
13807 o Minor bugfixes (certificate handling):
13808 - Fix a time handling bug in Tor certificates set to expire after
13809 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
13810 Coverity as CID 1415728.
13812 o Minor bugfixes (client, usability):
13813 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
13814 SOCKS4a requests that contain IP address strings, even when
13815 SafeSocks in enabled, as this prevents user from connecting to
13816 known IP addresses without relying on DNS for resolving. SafeSocks
13817 still rejects SOCKS connections that connect to IP addresses when
13818 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
13819 bugfix on Tor 0.2.6.2-alpha.
13821 o Minor bugfixes (code correctness):
13822 - Call htons() in extend_cell_format() for encoding a 16-bit value.
13823 Previously we used ntohs(), which happens to behave the same on
13824 all the platforms we support, but which isn't really correct.
13825 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
13826 - For defense-in-depth, make the controller's write_escaped_data()
13827 function robust to extremely long inputs. Fixes bug 19281; bugfix
13828 on 0.1.1.1-alpha. Reported by Guido Vranken.
13830 o Minor bugfixes (compilation):
13831 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
13832 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
13834 o Minor bugfixes (consensus expiry):
13835 - Check for adequate directory information correctly. Previously, Tor
13836 would reconsider whether it had sufficient directory information
13837 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
13839 o Minor bugfixes (directory protocol):
13840 - Directory servers now include a "Date:" http header for response
13841 codes other than 200. Clients starting with a skewed clock and a
13842 recent consensus were getting "304 Not modified" responses from
13843 directory authorities, so without the Date header, the client
13844 would never hear about a wrong clock. Fixes bug 23499; bugfix
13846 - Make clients wait for 6 seconds before trying to download a
13847 consensus from an authority. Fixes bug 17750; bugfix
13850 o Minor bugfixes (DoS-resistance):
13851 - If future code asks if there are any running bridges, without
13852 checking if bridges are enabled, log a BUG warning rather than
13853 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
13855 o Minor bugfixes (format strictness):
13856 - Restrict several data formats to decimal. Previously, the
13857 BuildTimeHistogram entries in the state file, the "bw=" entries in
13858 the bandwidth authority file, and the process IDs passed to the
13859 __OwningControllerProcess option could all be specified in hex or
13860 octal as well as in decimal. This was not an intentional feature.
13861 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
13864 o Minor bugfixes (heartbeat):
13865 - If we fail to write a heartbeat message, schedule a retry for the
13866 minimum heartbeat interval number of seconds in the future. Fixes
13867 bug 19476; bugfix on 0.2.3.1-alpha.
13869 o Minor bugfixes (linux seccomp2 sandbox, logging):
13870 - Fix some messages on unexpected errors from the seccomp2 library.
13871 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
13873 o Minor bugfixes (logging):
13874 - Remove duplicate log messages regarding opening non-local
13875 SocksPorts upon parsing config and opening listeners at startup.
13876 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
13877 - Use a more comprehensible log message when telling the user
13878 they've excluded every running exit node. Fixes bug 7890; bugfix
13880 - When logging the number of descriptors we intend to download per
13881 directory request, do not log a number higher than then the number
13882 of descriptors we're fetching in total. Fixes bug 19648; bugfix
13884 - When warning about a directory owned by the wrong user, log the
13885 actual name of the user owning the directory. Previously, we'd log
13886 the name of the process owner twice. Fixes bug 23487; bugfix
13888 - The tor specification says hop counts are 1-based, so fix two log
13889 messages that mistakenly logged 0-based hop counts. Fixes bug
13890 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
13891 Credit to Xiaofan Li for reporting this issue.
13893 o Minor bugfixes (portability):
13894 - Stop using the PATH_MAX variable, which is not defined on GNU
13895 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
13897 o Minor bugfixes (relay):
13898 - When uploading our descriptor for the first time after startup,
13899 report the reason for uploading as "Tor just started" rather than
13900 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
13901 - Avoid unnecessary calls to directory_fetches_from_authorities() on
13902 relays, to prevent spurious address resolutions and descriptor
13903 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
13904 bugfix on in 0.2.8.1-alpha.
13906 o Minor bugfixes (tests):
13907 - Fix a broken unit test for the OutboundAddress option: the parsing
13908 function was never returning an error on failure. Fixes bug 23366;
13909 bugfix on 0.3.0.3-alpha.
13910 - Fix a signed-integer overflow in the unit tests for
13911 dir/download_status_random_backoff, which was untriggered until we
13912 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
13914 o Minor bugfixes (usability, control port):
13915 - Stop making an unnecessary routerlist check in NETINFO clock skew
13916 detection; this was preventing clients from reporting NETINFO clock
13917 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
13919 o Code simplification and refactoring:
13920 - Extract the code for handling newly-open channels into a separate
13921 function from the general code to handle channel state
13922 transitions. This change simplifies our callgraph, reducing the
13923 size of the largest strongly connected component by roughly a
13924 factor of two. Closes ticket 22608.
13925 - Remove dead code for largely unused statistics on the number of
13926 times we've attempted various public key operations. Fixes bug
13927 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
13928 - Remove several now-obsolete functions for asking about old
13929 variants directory authority status. Closes ticket 22311; patch
13931 - Remove some of the code that once supported "Named" and "Unnamed"
13932 routers. Authorities no longer vote for these flags. Closes
13934 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
13935 and old hidden services, to indicate that they aren't suitable for
13936 new protocols or formats. Closes ticket 23026.
13937 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
13938 22521. Patch from Neel Chauhan.
13939 - Split the enormous circuit_send_next_onion_skin() function into
13940 multiple subfunctions. Closes ticket 22804.
13941 - Split the portions of the buffer.c module that handle particular
13942 protocols into separate modules. Part of ticket 23149.
13943 - Use our test macros more consistently, to produce more useful
13944 error messages when our unit tests fail. Add coccinelle patches to
13945 allow us to re-check for test macro uses. Closes ticket 22497.
13947 o Deprecated features:
13948 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
13949 only applies to direct unencrypted HTTP connections to your
13950 directory server, which your Tor probably isn't using. Closes
13954 - Clarify in the manual that "Sandbox 1" is only supported on Linux
13955 kernels. Closes ticket 22677.
13956 - Document all values of PublishServerDescriptor in the manpage.
13957 Closes ticket 15645.
13958 - Improve the documentation for the directory port part of the
13959 DirAuthority line. Closes ticket 20152.
13960 - Restore documentation for the authorities' "approved-routers"
13961 file. Closes ticket 21148.
13963 o Removed features:
13964 - The AllowDotExit option has been removed as unsafe. It has been
13965 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
13966 - The ClientDNSRejectInternalAddresses flag can no longer be set on
13967 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
13968 Closes ticket 21031.
13969 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
13970 nobody was using it any longer. Closes ticket 22377.
13973 Changes in version 0.2.8.15 - 2017-09-18
13974 Tor 0.2.8.15 backports a collection of bugfixes from later
13977 Most significantly, it includes a fix for TROVE-2017-008, a
13978 security bug that affects hidden services running with the
13979 SafeLogging option disabled. For more information, see
13980 https://trac.torproject.org/projects/tor/ticket/23490
13982 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
13983 2018. We suggest that you upgrade to the latest stable release if
13984 possible. If you can't, we recommend that you upgrade at least to
13985 0.2.9, which will be supported until 2020.
13987 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13988 - Avoid an assertion failure bug affecting our implementation of
13989 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13990 handling of "0xx" differs from what we had expected. Fixes bug
13991 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13994 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13997 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13998 - Backport a fix for an "unused variable" warning that appeared
13999 in some versions of mingw. Fixes bug 22838; bugfix on
14002 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14003 - Fix a memset() off the end of an array when packing cells. This
14004 bug should be harmless in practice, since the corrupted bytes are
14005 still in the same structure, and are always padding bytes,
14006 ignored, or immediately overwritten, depending on compiler
14007 behavior. Nevertheless, because the memset()'s purpose is to make
14008 sure that any other cell-handling bugs can't expose bytes to the
14009 network, we need to fix it. Fixes bug 22737; bugfix on
14010 0.2.4.11-alpha. Fixes CID 1401591.
14012 o Build features (backport from 0.3.1.5-alpha):
14013 - Tor's repository now includes a Travis Continuous Integration (CI)
14014 configuration file (.travis.yml). This is meant to help new
14015 developers and contributors who fork Tor to a Github repository be
14016 better able to test their changes, and understand what we expect
14017 to pass. To use this new build feature, you must fork Tor to your
14018 Github account, then go into the "Integrations" menu in the
14019 repository settings for your fork and enable Travis, then push
14020 your changes. Closes ticket 22636.
14023 Changes in version 0.2.9.12 - 2017-09-18
14024 Tor 0.2.9.12 backports a collection of bugfixes from later
14027 Most significantly, it includes a fix for TROVE-2017-008, a
14028 security bug that affects hidden services running with the
14029 SafeLogging option disabled. For more information, see
14030 https://trac.torproject.org/projects/tor/ticket/23490
14032 o Major features (security, backport from 0.3.0.2-alpha):
14033 - Change the algorithm used to decide DNS TTLs on client and server
14034 side, to better resist DNS-based correlation attacks like the
14035 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
14036 Feamster. Now relays only return one of two possible DNS TTL
14037 values, and clients are willing to believe DNS TTL values up to 3
14038 hours long. Closes ticket 19769.
14040 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
14041 - Fix a rare crash when sending a begin cell on a circuit whose
14042 linked directory connection had already been closed. Fixes bug
14043 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14045 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
14046 - Fix a bug that prevented exit nodes from caching DNS records for
14047 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
14049 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14050 - Fix a typo that had prevented TPROXY-based transparent proxying
14051 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14052 Patch from "d4fq0fQAgoJ".
14054 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14055 - Avoid an assertion failure bug affecting our implementation of
14056 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14057 handling of "0xx" differs from what we had expected. Fixes bug
14058 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14060 o Minor features (code style, backport from 0.3.1.3-alpha):
14061 - Add "Falls through" comments to our codebase, in order to silence
14062 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14063 Stieger. Closes ticket 22446.
14065 o Minor features (geoip):
14066 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14069 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
14070 - Roll over monthly accounting at the configured hour and minute,
14071 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14072 Found by Andrey Karpov with PVS-Studio.
14074 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
14075 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14076 bugfix on 0.2.8.1-alpha.
14077 - Fix warnings when building with libscrypt and openssl scrypt support
14078 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14079 - When building with certain versions the mingw C header files, avoid
14080 float-conversion warnings when calling the C functions isfinite(),
14081 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
14083 o Minor bugfixes (compilation, backport from 0.3.1.7):
14084 - Avoid compiler warnings in the unit tests for running tor_sscanf()
14085 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14087 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14088 - Backport a fix for an "unused variable" warning that appeared
14089 in some versions of mingw. Fixes bug 22838; bugfix on
14092 o Minor bugfixes (controller, backport from 0.3.1.7):
14093 - Do not crash when receiving a HSPOST command with an empty body.
14094 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14095 - Do not crash when receiving a POSTDESCRIPTOR command with an
14096 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14098 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14099 - Avoid Coverity build warnings related to our BUG() macro. By
14100 default, Coverity treats BUG() as the Linux kernel does: an
14101 instant abort(). We need to override that so our BUG() macro
14102 doesn't prevent Coverity from analyzing functions that use it.
14103 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14105 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
14106 - Fix a memset() off the end of an array when packing cells. This
14107 bug should be harmless in practice, since the corrupted bytes are
14108 still in the same structure, and are always padding bytes,
14109 ignored, or immediately overwritten, depending on compiler
14110 behavior. Nevertheless, because the memset()'s purpose is to make
14111 sure that any other cell-handling bugs can't expose bytes to the
14112 network, we need to fix it. Fixes bug 22737; bugfix on
14113 0.2.4.11-alpha. Fixes CID 1401591.
14115 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14116 - When setting the maximum number of connections allowed by the OS,
14117 always allow some extra file descriptors for other files. Fixes
14118 bug 22797; bugfix on 0.2.0.10-alpha.
14120 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14121 - Avoid a sandbox failure when trying to re-bind to a socket and
14122 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14124 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14125 - Permit the fchmod system call, to avoid crashing on startup when
14126 starting with the seccomp2 sandbox and an unexpected set of
14127 permissions on the data directory or its contents. Fixes bug
14128 22516; bugfix on 0.2.5.4-alpha.
14130 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
14131 - Avoid a double-marked-circuit warning that could happen when we
14132 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14135 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14136 - Reject version numbers with non-numeric prefixes (such as +, -, or
14137 whitespace). Disallowing whitespace prevents differential version
14138 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14139 and part of 21508; bugfix on 0.0.8pre1.
14141 o Build features (backport from 0.3.1.5-alpha):
14142 - Tor's repository now includes a Travis Continuous Integration (CI)
14143 configuration file (.travis.yml). This is meant to help new
14144 developers and contributors who fork Tor to a Github repository be
14145 better able to test their changes, and understand what we expect
14146 to pass. To use this new build feature, you must fork Tor to your
14147 Github account, then go into the "Integrations" menu in the
14148 repository settings for your fork and enable Travis, then push
14149 your changes. Closes ticket 22636.
14152 Changes in version 0.3.0.11 - 2017-09-18
14153 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
14156 Most significantly, it includes a fix for TROVE-2017-008, a
14157 security bug that affects hidden services running with the
14158 SafeLogging option disabled. For more information, see
14159 https://trac.torproject.org/projects/tor/ticket/23490
14161 o Minor features (code style, backport from 0.3.1.7):
14162 - Add "Falls through" comments to our codebase, in order to silence
14163 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14164 Stieger. Closes ticket 22446.
14167 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14170 o Minor bugfixes (compilation, backport from 0.3.1.7):
14171 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14172 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14174 o Minor bugfixes (controller, backport from 0.3.1.7):
14175 - Do not crash when receiving a HSPOST command with an empty body.
14176 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14177 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14178 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14180 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
14181 - When setting the maximum number of connections allowed by the OS,
14182 always allow some extra file descriptors for other files. Fixes
14183 bug 22797; bugfix on 0.2.0.10-alpha.
14185 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
14186 - Remove a forgotten debugging message when an introduction point
14187 successfully establishes a hidden service prop224 circuit with
14189 - Change three other log_warn() for an introduction point to
14190 protocol warnings, because they can be failure from the network
14191 and are not relevant to the operator. Fixes bug 23078; bugfix on
14192 0.3.0.1-alpha and 0.3.0.2-alpha.
14195 Changes in version 0.3.1.7 - 2017-09-18
14196 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
14198 With the 0.3.1 series, Tor now serves and downloads directory
14199 information in more compact formats, to save on bandwidth overhead. It
14200 also contains a new padding system to resist netflow-based traffic
14201 analysis, and experimental support for building parts of Tor in Rust
14202 (though no parts of Tor are in Rust yet). There are also numerous
14203 small features, bugfixes on earlier release series, and groundwork for
14204 the hidden services revamp of 0.3.2.
14206 This release also includes a fix for TROVE-2017-008, a security bug
14207 that affects hidden services running with the SafeLogging option
14208 disabled. For more information, see
14209 https://trac.torproject.org/projects/tor/ticket/23490
14211 Per our stable release policy, we plan to support each stable release
14212 series for at least the next nine months, or for three months after
14213 the first stable release of the next series: whichever is longer. If
14214 you need a release with long-term support, we recommend that you stay
14215 with the 0.2.9 series.
14217 Below is a list of the changes since 0.3.1.6-rc. For a list of all
14218 changes since 0.3.0, see the ReleaseNotes file.
14220 o Major bugfixes (security, hidden services, loggging):
14221 - Fix a bug where we could log uninitialized stack when a certain
14222 hidden service error occurred while SafeLogging was disabled.
14223 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
14224 TROVE-2017-008 and CVE-2017-0380.
14226 o Minor features (defensive programming):
14227 - Create a pair of consensus parameters, nf_pad_tor2web and
14228 nf_pad_single_onion, to disable netflow padding in the consensus
14229 for non-anonymous connections in case the overhead is high. Closes
14232 o Minor features (diagnostic):
14233 - Add a stack trace to the bug warnings that can be logged when
14234 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
14235 attempt for bug 23105.
14237 o Minor features (geoip):
14238 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
14241 o Minor bugfixes (compilation):
14242 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
14243 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
14245 o Minor bugfixes (controller):
14246 - Do not crash when receiving a HSPOST command with an empty body.
14247 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
14248 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
14249 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
14251 o Minor bugfixes (relay):
14252 - Inform the geoip and rephist modules about all requests, even on
14253 relays that are only fetching microdescriptors. Fixes a bug
14254 related to 21585; bugfix on 0.3.0.1-alpha.
14256 o Minor bugfixes (unit tests):
14257 - Fix a channelpadding unit test failure on slow systems by using
14258 mocked time instead of actual time. Fixes bug 23077; bugfix
14262 Changes in version 0.3.1.6-rc - 2017-09-05
14263 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
14264 release series, including a bug that produced weird behavior on
14265 Windows directory caches.
14267 This is the first release candidate in the Tor 0.3.1 series. If we
14268 find no new bugs or regressions here, the first stable 0.3.1 release
14269 will be nearly identical to it.
14271 o Major bugfixes (windows, directory cache):
14272 - On Windows, do not try to delete cached consensus documents and
14273 diffs before they are unmapped from memory--Windows won't allow
14274 that. Instead, allow the consensus cache directory to grow larger,
14275 to hold files that might need to stay around longer. Fixes bug
14276 22752; bugfix on 0.3.1.1-alpha.
14278 o Minor features (directory authority):
14279 - Improve the message that authorities report to relays that present
14280 RSA/Ed25519 keypairs that conflict with previously pinned keys.
14281 Closes ticket 22348.
14283 o Minor features (geoip):
14284 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
14287 o Minor features (testing):
14288 - Add more tests for compression backend initialization. Closes
14291 o Minor bugfixes (directory cache):
14292 - Fix a memory leak when recovering space in the consensus cache.
14293 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
14295 o Minor bugfixes (hidden service):
14296 - Increase the number of circuits that a service is allowed to
14297 open over a specific period of time. The value was lower than it
14298 should be (8 vs 12) in the normal case of 3 introduction points.
14299 Fixes bug 22159; bugfix on 0.3.0.5-rc.
14300 - Fix a BUG warning during HSv3 descriptor decoding that could be
14301 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
14302 on 0.3.0.1-alpha. Bug found by "haxxpop".
14303 - Rate-limit the log messages if we exceed the maximum number of
14304 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
14306 o Minor bugfixes (logging, relay):
14307 - Remove a forgotten debugging message when an introduction point
14308 successfully establishes a hidden service prop224 circuit with
14310 - Change three other log_warn() for an introduction point to
14311 protocol warnings, because they can be failure from the network
14312 and are not relevant to the operator. Fixes bug 23078; bugfix on
14313 0.3.0.1-alpha and 0.3.0.2-alpha.
14315 o Minor bugfixes (relay):
14316 - When a relay is not running as a directory cache, it will no
14317 longer generate compressed consensuses and consensus diff
14318 information. Previously, this was a waste of disk and CPU. Fixes
14319 bug 23275; bugfix on 0.3.1.1-alpha.
14321 o Minor bugfixes (robustness, error handling):
14322 - Improve our handling of the cases where OpenSSL encounters a
14323 memory error while encoding keys and certificates. We haven't
14324 observed these errors in the wild, but if they do happen, we now
14325 detect and respond better. Fixes bug 19418; bugfix on all versions
14326 of Tor. Reported by Guido Vranken.
14328 o Minor bugfixes (stability):
14329 - Avoid crashing on a double-free when unable to load or process an
14330 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
14331 with the clang static analyzer.
14333 o Minor bugfixes (testing):
14334 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
14335 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
14336 - Port the hs_ntor handshake test to work correctly with recent
14337 versions of the pysha3 module. Fixes bug 23071; bugfix
14340 o Minor bugfixes (Windows service):
14341 - When running as a Windows service, set the ID of the main thread
14342 correctly. Failure to do so made us fail to send log messages to
14343 the controller in 0.2.1.16-rc, slowed down controller event
14344 delivery in 0.2.7.3-rc and later, and crash with an assertion
14345 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
14346 Patch and diagnosis from "Vort".
14349 Changes in version 0.3.0.10 - 2017-08-02
14350 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
14351 from the current Tor alpha series. OpenBSD users and TPROXY users
14352 should upgrade; others are probably okay sticking with 0.3.0.9.
14354 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
14355 - Tor's repository now includes a Travis Continuous Integration (CI)
14356 configuration file (.travis.yml). This is meant to help new
14357 developers and contributors who fork Tor to a Github repository be
14358 better able to test their changes, and understand what we expect
14359 to pass. To use this new build feature, you must fork Tor to your
14360 Github account, then go into the "Integrations" menu in the
14361 repository settings for your fork and enable Travis, then push
14362 your changes. Closes ticket 22636.
14364 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
14365 - Fix a typo that had prevented TPROXY-based transparent proxying
14366 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14367 Patch from "d4fq0fQAgoJ".
14369 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
14370 - Avoid an assertion failure bug affecting our implementation of
14371 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14372 handling of "0xbar" differs from what we had expected. Fixes bug
14373 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14375 o Minor features (backport from 0.3.1.5-alpha):
14376 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14379 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
14380 - Roll over monthly accounting at the configured hour and minute,
14381 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14382 Found by Andrey Karpov with PVS-Studio.
14384 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
14385 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
14386 bugfix on 0.2.8.1-alpha.
14387 - Fix warnings when building with libscrypt and openssl scrypt
14388 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14389 - When building with certain versions of the mingw C header files,
14390 avoid float-conversion warnings when calling the C functions
14391 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14394 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
14395 - Backport a fix for an "unused variable" warning that appeared
14396 in some versions of mingw. Fixes bug 22838; bugfix on
14399 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
14400 - Avoid Coverity build warnings related to our BUG() macro. By
14401 default, Coverity treats BUG() as the Linux kernel does: an
14402 instant abort(). We need to override that so our BUG() macro
14403 doesn't prevent Coverity from analyzing functions that use it.
14404 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14406 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
14407 - When rejecting a router descriptor for running an obsolete version
14408 of Tor without ntor support, warn about the obsolete tor version,
14409 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14411 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
14412 - Avoid a sandbox failure when trying to re-bind to a socket and
14413 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14415 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
14416 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14417 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14420 Changes in version 0.3.1.5-alpha - 2017-08-01
14421 Tor 0.3.1.5-alpha improves the performance of consensus diff
14422 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
14423 several other bugs. If no serious bugs are found in this version, the
14424 next version will be a release candidate.
14426 This release also marks the end of support for the Tor 0.2.4.x,
14427 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
14428 further bug or security fixes. Anyone still running or distributing
14429 one of those versions should upgrade.
14431 o Major features (build system, continuous integration):
14432 - Tor's repository now includes a Travis Continuous Integration (CI)
14433 configuration file (.travis.yml). This is meant to help new
14434 developers and contributors who fork Tor to a Github repository be
14435 better able to test their changes, and understand what we expect
14436 to pass. To use this new build feature, you must fork Tor to your
14437 Github account, then go into the "Integrations" menu in the
14438 repository settings for your fork and enable Travis, then push
14439 your changes. Closes ticket 22636.
14441 o Major bugfixes (openbsd, denial-of-service):
14442 - Avoid an assertion failure bug affecting our implementation of
14443 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
14444 handling of "0xbar" differs from what we had expected. Fixes bug
14445 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
14447 o Major bugfixes (relay, performance):
14448 - Perform circuit handshake operations at a higher priority than we
14449 use for consensus diff creation and compression. This should
14450 prevent circuits from starving when a relay or bridge receives a
14451 new consensus, especially on lower-powered machines. Fixes bug
14452 22883; bugfix on 0.3.1.1-alpha.
14454 o Minor features (bridge authority):
14455 - Add "fingerprint" lines to the networkstatus-bridges file produced
14456 by bridge authorities. Closes ticket 22207.
14458 o Minor features (directory cache, consensus diff):
14459 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
14460 operators with low-resource environments to adjust the number of
14461 consensuses they'll store and generate diffs from. Most cache
14462 operators should leave it unchanged. Helps to work around
14465 o Minor features (geoip):
14466 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
14469 o Minor features (relay, performance):
14470 - Always start relays with at least two worker threads, to prevent
14471 priority inversion on slow tasks. Part of the fix for bug 22883.
14472 - Allow background work to be queued with different priorities, so
14473 that a big pile of slow low-priority jobs will not starve out
14474 higher priority jobs. This lays the groundwork for a fix for
14477 o Minor bugfixes (build system, rust):
14478 - Fix a problem where Rust toolchains were not being found when
14479 building without --enable-cargo-online-mode, due to setting the
14480 $HOME environment variable instead of $CARGO_HOME. Fixes bug
14481 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
14483 o Minor bugfixes (compatibility, zstd):
14484 - Write zstd epilogues correctly when the epilogue requires
14485 reallocation of the output buffer, even with zstd 1.3.0.
14486 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
14487 22927; bugfix on 0.3.1.1-alpha.
14489 o Minor bugfixes (compilation warnings):
14490 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
14491 22915; bugfix on 0.2.8.1-alpha.
14492 - Fix warnings when building with libscrypt and openssl scrypt
14493 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
14494 - Compile correctly when both openssl 1.1.0 and libscrypt are
14495 detected. Previously this would cause an error. Fixes bug 22892;
14496 bugfix on 0.3.1.1-alpha.
14497 - When building with certain versions of the mingw C header files,
14498 avoid float-conversion warnings when calling the C functions
14499 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
14502 o Minor bugfixes (coverity build support):
14503 - Avoid Coverity build warnings related to our BUG() macro. By
14504 default, Coverity treats BUG() as the Linux kernel does: an
14505 instant abort(). We need to override that so our BUG() macro
14506 doesn't prevent Coverity from analyzing functions that use it.
14507 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
14509 o Minor bugfixes (directory authority):
14510 - When a directory authority rejects a descriptor or extrainfo with
14511 a given digest, mark that digest as undownloadable, so that we do
14512 not attempt to download it again over and over. We previously
14513 tried to avoid downloading such descriptors by other means, but we
14514 didn't notice if we accidentally downloaded one anyway. This
14515 behavior became problematic in 0.2.7.2-alpha, when authorities
14516 began pinning Ed25519 keys. Fixes bug 22349; bugfix
14519 o Minor bugfixes (error reporting, windows):
14520 - When formatting Windows error messages, use the English format to
14521 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
14524 o Minor bugfixes (file limits, osx):
14525 - When setting the maximum number of connections allowed by the OS,
14526 always allow some extra file descriptors for other files. Fixes
14527 bug 22797; bugfix on 0.2.0.10-alpha.
14529 o Minor bugfixes (linux seccomp2 sandbox):
14530 - Avoid a sandbox failure when trying to re-bind to a socket and
14531 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
14533 o Minor bugfixes (memory leaks):
14534 - Fix a small memory leak when validating a configuration that uses
14535 two or more AF_UNIX sockets for the same port type. Fixes bug
14536 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
14538 o Minor bugfixes (unit tests):
14539 - test_consdiff_base64cmp would fail on OS X because while OS X
14540 follows the standard of (less than zero/zero/greater than zero),
14541 it doesn't follow the convention of (-1/0/+1). Make the test
14542 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
14543 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
14544 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
14547 Changes in version 0.3.1.4-alpha - 2017-06-29
14548 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
14549 to use a guard that was in the same network family as a chosen exit
14550 relay. This is a security regression; all clients running earlier
14551 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
14554 This release also fixes several other bugs introduced in 0.3.0.x
14555 and 0.3.1.x, including others that can affect bandwidth usage
14558 o New dependencies:
14559 - To build with zstd and lzma support, Tor now requires the
14560 pkg-config tool at build time. (This requirement was new in
14561 0.3.1.1-alpha, but was not noted at the time. Noting it here to
14562 close ticket 22623.)
14564 o Major bugfixes (path selection, security):
14565 - When choosing which guard to use for a circuit, avoid the exit's
14566 family along with the exit itself. Previously, the new guard
14567 selection logic avoided the exit, but did not consider its family.
14568 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
14569 006 and CVE-2017-0377.
14571 o Major bugfixes (compression, zstd):
14572 - Correctly detect a full buffer when decompressing a large zstd-
14573 compressed input. Previously, we would sometimes treat a full
14574 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
14576 o Major bugfixes (directory protocol):
14577 - Ensure that we send "304 Not modified" as HTTP status code when a
14578 client is attempting to fetch a consensus or consensus diff, and
14579 the best one we can send them is one they already have. Fixes bug
14580 22702; bugfix on 0.3.1.1-alpha.
14582 o Major bugfixes (entry guards):
14583 - When starting with an old consensus, do not add new entry guards
14584 unless the consensus is "reasonably live" (under 1 day old). Fixes
14585 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
14587 o Minor features (bug mitigation, diagnostics, logging):
14588 - Avoid an assertion failure, and log a better error message, when
14589 unable to remove a file from the consensus cache on Windows.
14590 Attempts to mitigate and diagnose bug 22752.
14592 o Minor features (geoip):
14593 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
14596 o Minor bugfixes (compression):
14597 - When compressing or decompressing a buffer, check for a failure to
14598 create a compression object. Fixes bug 22626; bugfix
14600 - When decompressing a buffer, check for extra data after the end of
14601 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
14602 - When decompressing an object received over an anonymous directory
14603 connection, if we have already decompressed it using an acceptable
14604 compression method, do not reject it for looking like an
14605 unacceptable compression method. Fixes part of bug 22670; bugfix
14607 - When serving directory votes compressed with zlib, do not claim to
14608 have compressed them with zstd. Fixes bug 22669; bugfix
14610 - When spooling compressed data to an output buffer, don't try to
14611 spool more data when there is no more data to spool and we are not
14612 trying to flush the input. Previously, we would sometimes launch
14613 compression requests with nothing to do, which interferes with our
14614 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
14616 o Minor bugfixes (defensive programming):
14617 - Detect and break out of infinite loops in our compression code. We
14618 don't think that any such loops exist now, but it's best to be
14619 safe. Closes ticket 22672.
14620 - Fix a memset() off the end of an array when packing cells. This
14621 bug should be harmless in practice, since the corrupted bytes are
14622 still in the same structure, and are always padding bytes,
14623 ignored, or immediately overwritten, depending on compiler
14624 behavior. Nevertheless, because the memset()'s purpose is to make
14625 sure that any other cell-handling bugs can't expose bytes to the
14626 network, we need to fix it. Fixes bug 22737; bugfix on
14627 0.2.4.11-alpha. Fixes CID 1401591.
14629 o Minor bugfixes (linux seccomp2 sandbox):
14630 - Permit the fchmod system call, to avoid crashing on startup when
14631 starting with the seccomp2 sandbox and an unexpected set of
14632 permissions on the data directory or its contents. Fixes bug
14633 22516; bugfix on 0.2.5.4-alpha.
14634 - Fix a crash in the LZMA module, when the sandbox was enabled, and
14635 liblzma would allocate more than 16 MB of memory. We solve this by
14636 bumping the mprotect() limit in the sandbox module from 16 MB to
14637 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
14639 o Minor bugfixes (logging):
14640 - When decompressing, do not warn if we fail to decompress using a
14641 compression method that we merely guessed. Fixes part of bug
14642 22670; bugfix on 0.1.1.14-alpha.
14643 - When decompressing, treat mismatch between content-encoding and
14644 actual compression type as a protocol warning. Fixes part of bug
14645 22670; bugfix on 0.1.1.9-alpha.
14646 - Downgrade "assigned_to_cpuworker failed" message to info-level
14647 severity. In every case that can reach it, either a better warning
14648 has already been logged, or no warning is warranted. Fixes bug
14649 22356; bugfix on 0.2.6.3-alpha.
14650 - Demote a warn that was caused by libevent delays to info if
14651 netflow padding is less than 4.5 seconds late, or to notice
14652 if it is more (4.5 seconds is the amount of time that a netflow
14653 record might be emitted after, if we chose the maximum timeout).
14654 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
14656 o Minor bugfixes (process behavior):
14657 - When exiting because of an error, always exit with a nonzero exit
14658 status. Previously, we would fail to report an error in our exit
14659 status in cases related to __OwningControllerProcess failure,
14660 lockfile contention, and Ed25519 key initialization. Fixes bug
14661 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
14662 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
14666 - Add a manpage description for the key-pinning-journal file. Closes
14668 - Correctly note that bandwidth accounting values are stored in the
14669 state file, and the bw_accounting file is now obsolete. Closes
14671 - Document more of the files in the Tor data directory, including
14672 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
14673 approved-routers, sr-random, and diff-cache. Found while fixing
14677 Changes in version 0.3.0.9 - 2017-06-29
14678 Tor 0.3.0.9 fixes a path selection bug that would allow a client
14679 to use a guard that was in the same network family as a chosen exit
14680 relay. This is a security regression; all clients running earlier
14681 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
14684 This release also backports several other bugfixes from the 0.3.1.x
14687 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
14688 - When choosing which guard to use for a circuit, avoid the exit's
14689 family along with the exit itself. Previously, the new guard
14690 selection logic avoided the exit, but did not consider its family.
14691 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
14692 006 and CVE-2017-0377.
14694 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
14695 - Don't block bootstrapping when a primary bridge is offline and we
14696 can't get its descriptor. Fixes bug 22325; fixes one case of bug
14697 21969; bugfix on 0.3.0.3-alpha.
14699 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
14700 - When starting with an old consensus, do not add new entry guards
14701 unless the consensus is "reasonably live" (under 1 day old). Fixes
14702 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
14704 o Minor features (geoip):
14705 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
14708 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
14709 - Reject version numbers with non-numeric prefixes (such as +, -, or
14710 whitespace). Disallowing whitespace prevents differential version
14711 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14712 and part of 21508; bugfix on 0.0.8pre1.
14714 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
14715 - Permit the fchmod system call, to avoid crashing on startup when
14716 starting with the seccomp2 sandbox and an unexpected set of
14717 permissions on the data directory or its contents. Fixes bug
14718 22516; bugfix on 0.2.5.4-alpha.
14720 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
14721 - Fix a memset() off the end of an array when packing cells. This
14722 bug should be harmless in practice, since the corrupted bytes are
14723 still in the same structure, and are always padding bytes,
14724 ignored, or immediately overwritten, depending on compiler
14725 behavior. Nevertheless, because the memset()'s purpose is to make
14726 sure that any other cell-handling bugs can't expose bytes to the
14727 network, we need to fix it. Fixes bug 22737; bugfix on
14728 0.2.4.11-alpha. Fixes CID 1401591.
14731 Changes in version 0.3.1.3-alpha - 2017-06-08
14732 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
14733 remotely crash a hidden service with an assertion failure. Anyone
14734 running a hidden service should upgrade to this version, or to some
14735 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
14737 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
14738 that sometimes made relays unreliable, as well as several other
14739 bugfixes described below.
14741 o Major bugfixes (hidden service, relay, security):
14742 - Fix a remotely triggerable assertion failure when a hidden service
14743 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
14744 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
14745 - Fix a remotely triggerable assertion failure caused by receiving a
14746 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14747 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14750 o Major bugfixes (relay, link handshake):
14751 - When performing the v3 link handshake on a TLS connection, report
14752 that we have the x509 certificate that we actually used on that
14753 connection, even if we have changed certificates since that
14754 connection was first opened. Previously, we would claim to have
14755 used our most recent x509 link certificate, which would sometimes
14756 make the link handshake fail. Fixes one case of bug 22460; bugfix
14759 o Major bugfixes (relays, key management):
14760 - Regenerate link and authentication certificates whenever the key
14761 that signs them changes; also, regenerate link certificates
14762 whenever the signed key changes. Previously, these processes were
14763 only weakly coupled, and we relays could (for minutes to hours)
14764 wind up with an inconsistent set of keys and certificates, which
14765 other relays would not accept. Fixes two cases of bug 22460;
14766 bugfix on 0.3.0.1-alpha.
14767 - When sending an Ed25519 signing->link certificate in a CERTS cell,
14768 send the certificate that matches the x509 certificate that we
14769 used on the TLS connection. Previously, there was a race condition
14770 if the TLS context rotated after we began the TLS handshake but
14771 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
14774 o Major bugfixes (torrc, crash):
14775 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
14776 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
14778 o Minor features (code style):
14779 - Add "Falls through" comments to our codebase, in order to silence
14780 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
14781 Stieger. Closes ticket 22446.
14783 o Minor features (diagnostic):
14784 - Add logging messages to try to diagnose a rare bug that seems to
14785 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
14786 think this is happening because of incorrect system clocks, but
14787 we'd like to know for certain. Diagnostic for bug 22466.
14789 o Minor bugfixes (correctness):
14790 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14791 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14793 o Minor bugfixes (directory protocol):
14794 - Check for libzstd >= 1.1, because older versions lack the
14795 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
14797 o Minor bugfixes (link handshake):
14798 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
14799 months, and regenerate it when it is within one month of expiring.
14800 Previously, we had generated this certificate at startup with a
14801 ten-year lifetime, but that could lead to weird behavior when Tor
14802 was started with a grossly inaccurate clock. Mitigates bug 22466;
14803 mitigation on 0.3.0.1-alpha.
14805 o Minor bugfixes (storage directories):
14806 - Always check for underflows in the cached storage directory usage.
14807 If the usage does underflow, re-calculate it. Also, avoid a
14808 separate underflow when the usage is not known. Fixes bug 22424;
14809 bugfix on 0.3.1.1-alpha.
14811 o Minor bugfixes (unit tests):
14812 - The unit tests now pass on systems where localhost is misconfigured
14813 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
14817 - Clarify the manpage for the (deprecated) torify script. Closes
14820 Changes in version 0.3.0.8 - 2017-06-08
14821 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
14822 remotely crash a hidden service with an assertion failure. Anyone
14823 running a hidden service should upgrade to this version, or to some
14824 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
14826 Tor 0.3.0.8 also includes fixes for several key management bugs
14827 that sometimes made relays unreliable, as well as several other
14828 bugfixes described below.
14830 o Major bugfixes (hidden service, relay, security, backport
14831 from 0.3.1.3-alpha):
14832 - Fix a remotely triggerable assertion failure when a hidden service
14833 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
14834 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
14835 - Fix a remotely triggerable assertion failure caused by receiving a
14836 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14837 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14840 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
14841 - When performing the v3 link handshake on a TLS connection, report
14842 that we have the x509 certificate that we actually used on that
14843 connection, even if we have changed certificates since that
14844 connection was first opened. Previously, we would claim to have
14845 used our most recent x509 link certificate, which would sometimes
14846 make the link handshake fail. Fixes one case of bug 22460; bugfix
14849 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
14850 - Regenerate link and authentication certificates whenever the key
14851 that signs them changes; also, regenerate link certificates
14852 whenever the signed key changes. Previously, these processes were
14853 only weakly coupled, and we relays could (for minutes to hours)
14854 wind up with an inconsistent set of keys and certificates, which
14855 other relays would not accept. Fixes two cases of bug 22460;
14856 bugfix on 0.3.0.1-alpha.
14857 - When sending an Ed25519 signing->link certificate in a CERTS cell,
14858 send the certificate that matches the x509 certificate that we
14859 used on the TLS connection. Previously, there was a race condition
14860 if the TLS context rotated after we began the TLS handshake but
14861 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
14864 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
14865 - Stop rejecting v3 hidden service descriptors because their size
14866 did not match an old padding rule. Fixes bug 22447; bugfix on
14869 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14870 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14871 December 2016 (of which ~126 were still functional) with a list of
14872 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14873 2017. Resolves ticket 21564.
14875 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
14876 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
14877 bug 22252; bugfix on 0.2.9.3-alpha.
14879 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
14880 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14881 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14883 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
14884 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
14885 months, and regenerate it when it is within one month of expiring.
14886 Previously, we had generated this certificate at startup with a
14887 ten-year lifetime, but that could lead to weird behavior when Tor
14888 was started with a grossly inaccurate clock. Mitigates bug 22466;
14889 mitigation on 0.3.0.1-alpha.
14891 o Minor bugfixes (memory leak, directory authority, backport from
14893 - When directory authorities reject a router descriptor due to
14894 keypinning, free the router descriptor rather than leaking the
14895 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14898 Changes in version 0.2.9.11 - 2017-06-08
14899 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
14900 remotely crash a hidden service with an assertion failure. Anyone
14901 running a hidden service should upgrade to this version, or to some
14902 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14903 are not affected by TROVE-2017-004.)
14905 Tor 0.2.9.11 also backports fixes for several key management bugs
14906 that sometimes made relays unreliable, as well as several other
14907 bugfixes described below.
14909 o Major bugfixes (hidden service, relay, security, backport
14910 from 0.3.1.3-alpha):
14911 - Fix a remotely triggerable assertion failure caused by receiving a
14912 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14913 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14916 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
14917 - When performing the v3 link handshake on a TLS connection, report
14918 that we have the x509 certificate that we actually used on that
14919 connection, even if we have changed certificates since that
14920 connection was first opened. Previously, we would claim to have
14921 used our most recent x509 link certificate, which would sometimes
14922 make the link handshake fail. Fixes one case of bug 22460; bugfix
14925 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14926 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14927 December 2016 (of which ~126 were still functional) with a list of
14928 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14929 2017. Resolves ticket 21564.
14931 o Minor features (future-proofing, backport from 0.3.0.7):
14932 - Tor no longer refuses to download microdescriptors or descriptors if
14933 they are listed as "published in the future". This change will
14934 eventually allow us to stop listing meaningful "published" dates
14935 in microdescriptor consensuses, and thereby allow us to reduce the
14936 resources required to download consensus diffs by over 50%.
14937 Implements part of ticket 21642; implements part of proposal 275.
14939 o Minor features (directory authorities, backport from 0.3.0.4-rc)
14940 - Directory authorities now reject relays running versions
14941 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
14942 suffer from bug 20499 and don't keep their consensus cache
14943 up-to-date. Resolves ticket 20509.
14945 o Minor features (geoip):
14946 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14949 o Minor bugfixes (control port, backport from 0.3.0.6):
14950 - The GETINFO extra-info/digest/<digest> command was broken because
14951 of a wrong base16 decode return value check, introduced when
14952 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
14954 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
14955 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14956 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14958 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
14959 - The getpid() system call is now permitted under the Linux seccomp2
14960 sandbox, to avoid crashing with versions of OpenSSL (and other
14961 libraries) that attempt to learn the process's PID by using the
14962 syscall rather than the VDSO code. Fixes bug 21943; bugfix
14965 o Minor bugfixes (memory leak, directory authority, backport
14966 from 0.3.1.2-alpha):
14967 - When directory authorities reject a router descriptor due to
14968 keypinning, free the router descriptor rather than leaking the
14969 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14971 Changes in version 0.2.8.14 - 2017-06-08
14972 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
14973 remotely crash a hidden service with an assertion failure. Anyone
14974 running a hidden service should upgrade to this version, or to some
14975 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14976 are not affected by TROVE-2017-004.)
14978 o Major bugfixes (hidden service, relay, security):
14979 - Fix a remotely triggerable assertion failure caused by receiving a
14980 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14981 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14984 o Minor features (geoip):
14985 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14988 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14989 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14990 December 2016 (of which ~126 were still functional) with a list of
14991 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14992 2017. Resolves ticket 21564.
14994 o Minor bugfixes (correctness):
14995 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14996 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14998 Changes in version 0.2.7.8 - 2017-06-08
14999 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
15000 remotely crash a hidden service with an assertion failure. Anyone
15001 running a hidden service should upgrade to this version, or to some
15002 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15003 are not affected by TROVE-2017-004.)
15005 o Major bugfixes (hidden service, relay, security):
15006 - Fix a remotely triggerable assertion failure caused by receiving a
15007 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15008 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15011 o Minor features (geoip):
15012 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15015 o Minor bugfixes (correctness):
15016 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15017 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15020 Changes in version 0.2.6.12 - 2017-06-08
15021 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
15022 remotely crash a hidden service with an assertion failure. Anyone
15023 running a hidden service should upgrade to this version, or to some
15024 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15025 are not affected by TROVE-2017-004.)
15027 o Major bugfixes (hidden service, relay, security):
15028 - Fix a remotely triggerable assertion failure caused by receiving a
15029 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15030 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15033 o Minor features (geoip):
15034 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15037 o Minor bugfixes (correctness):
15038 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15039 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15041 Changes in version 0.2.5.14 - 2017-06-08
15042 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
15043 remotely crash a hidden service with an assertion failure. Anyone
15044 running a hidden service should upgrade to this version, or to some
15045 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15046 are not affected by TROVE-2017-004.)
15048 o Major bugfixes (hidden service, relay, security):
15049 - Fix a remotely triggerable assertion failure caused by receiving a
15050 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15051 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15054 o Minor features (geoip):
15055 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15058 o Minor bugfixes (correctness):
15059 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15060 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15062 Changes in version 0.2.4.29 - 2017-06-08
15063 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
15064 remotely crash a hidden service with an assertion failure. Anyone
15065 running a hidden service should upgrade to this version, or to some
15066 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
15067 are not affected by TROVE-2017-004.)
15069 o Major bugfixes (hidden service, relay, security):
15070 - Fix a remotely triggerable assertion failure caused by receiving a
15071 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
15072 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
15075 o Minor features (geoip):
15076 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15079 o Minor bugfixes (correctness):
15080 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
15081 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
15084 Changes in version 0.3.1.2-alpha - 2017-05-26
15085 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
15086 fixes a few bugs found while testing 0.3.1.1-alpha, including a
15087 memory corruption bug that affected relay stability.
15089 o Major bugfixes (crash, relay):
15090 - Fix a memory-corruption bug in relays that set MyFamily.
15091 Previously, they would double-free MyFamily elements when making
15092 the next descriptor or when changing their configuration. Fixes
15093 bug 22368; bugfix on 0.3.1.1-alpha.
15095 o Minor bugfixes (logging):
15096 - Log a better message when a directory authority replies to an
15097 upload with an unexpected status code. Fixes bug 11121; bugfix
15100 o Minor bugfixes (memory leak, directory authority):
15101 - When directory authorities reject a router descriptor due to
15102 keypinning, free the router descriptor rather than leaking the
15103 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
15106 Changes in version 0.3.1.1-alpha - 2017-05-22
15107 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
15108 reduces the bandwidth usage for Tor's directory protocol, adds some
15109 basic padding to resist netflow-based traffic analysis and to serve as
15110 the basis of other padding in the future, and adds rust support to the
15113 It also contains numerous other small features and improvements to
15114 security, correctness, and performance.
15116 Below are the changes since 0.3.0.7.
15118 o Major features (directory protocol):
15119 - Tor relays and authorities can now serve clients an abbreviated
15120 version of the consensus document, containing only the changes
15121 since an older consensus document that the client holds. Clients
15122 now request these documents when available. When both client and
15123 server use this new protocol, they will use far less bandwidth (up
15124 to 94% less) to keep the client's consensus up-to-date. Implements
15125 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
15126 - Tor can now compress directory traffic with lzma or with zstd
15127 compression algorithms, which can deliver better bandwidth
15128 performance. Because lzma is computationally expensive, it's only
15129 used for documents that can be compressed once and served many
15130 times. Support for these algorithms requires that tor is built
15131 with the libzstd and/or liblzma libraries available. Implements
15132 proposal 278; closes ticket 21662.
15133 - Relays now perform the more expensive compression operations, and
15134 consensus diff generation, in worker threads. This separation
15135 avoids delaying the main thread when a new consensus arrives.
15137 o Major features (experimental):
15138 - Tor can now build modules written in Rust. To turn this on, pass
15139 the "--enable-rust" flag to the configure script. It's not time to
15140 get excited yet: currently, there is no actual Rust functionality
15141 beyond some simple glue code, and a notice at startup to tell you
15142 that Rust is running. Still, we hope that programmers and
15143 packagers will try building Tor with Rust support, so that we can
15144 find issues and solve portability problems. Closes ticket 22106.
15146 o Major features (traffic analysis resistance):
15147 - Connections between clients and relays now send a padding cell in
15148 each direction every 1.5 to 9.5 seconds (tunable via consensus
15149 parameters). This padding will not resist specialized
15150 eavesdroppers, but it should be enough to make many ISPs' routine
15151 network flow logging less useful in traffic analysis against
15154 Padding is negotiated using Tor's link protocol, so both relays
15155 and clients must upgrade for this to take effect. Clients may
15156 still send padding despite the relay's version by setting
15157 ConnectionPadding 1 in torrc, and may disable padding by setting
15158 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
15159 users with the torrc option ReducedConnectionPadding. Implements
15160 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
15161 - Relays will publish 24 hour totals of padding and non-padding cell
15162 counts to their extra-info descriptors, unless PaddingStatistics 0
15163 is set in torrc. These 24 hour totals are also rounded to
15164 multiples of 10000.
15166 o Major bugfixes (connection usage):
15167 - We use NETINFO cells to try to determine if both relays involved
15168 in a connection will agree on the canonical status of that
15169 connection. We prefer the connections where this is the case for
15170 extend cells, and try to close connections where relays disagree
15171 on their canonical status early. Also, we now prefer the oldest
15172 valid connection for extend cells. These two changes should reduce
15173 the number of long-term connections that are kept open between
15174 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
15175 - Relays now log hourly statistics (look for
15176 "channel_check_for_duplicates" lines) on the total number of
15177 connections to other relays. If the number of connections per
15178 relay is unexpectedly large, this log message is at notice level.
15179 Otherwise it is at info.
15181 o Major bugfixes (entry guards):
15182 - Don't block bootstrapping when a primary bridge is offline and we
15183 can't get its descriptor. Fixes bug 22325; fixes one case of bug
15184 21969; bugfix on 0.3.0.3-alpha.
15186 o Major bugfixes (linux TPROXY support):
15187 - Fix a typo that had prevented TPROXY-based transparent proxying
15188 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
15189 Patch from "d4fq0fQAgoJ".
15191 o Minor features (security, windows):
15192 - Enable a couple of pieces of Windows hardening: one
15193 (HeapEnableTerminationOnCorruption) that has been on-by-default
15194 since Windows 8, and unavailable before Windows 7; and one
15195 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
15196 affect us, but shouldn't do any harm. Closes ticket 21953.
15198 o Minor features (config options):
15199 - Allow "%include" directives in torrc configuration files. These
15200 directives import the settings from other files, or from all the
15201 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
15202 - Make SAVECONF return an error when overwriting a torrc that has
15203 includes. Using SAVECONF with the FORCE option will allow it to
15204 overwrite torrc even if includes are used. Related to ticket 1922.
15205 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
15206 will work without the FORCE option. Related to ticket 1922.
15208 o Minor features (controller):
15209 - Warn the first time that a controller requests data in the long-
15210 deprecated 'GETINFO network-status' format. Closes ticket 21703.
15212 o Minor features (defaults):
15213 - The default value for UseCreateFast is now 0: clients which
15214 haven't yet received a consensus document will now use a proper
15215 ntor handshake to talk to their directory servers whenever they
15216 can. Closes ticket 21407.
15217 - Onion key rotation and expiry intervals are now defined as a
15218 network consensus parameter, per proposal 274. The default
15219 lifetime of an onion key is increased from 7 to 28 days. Old onion
15220 keys will expire after 7 days by default. This change will make
15221 consensus diffs much smaller, and save significant bandwidth.
15222 Closes ticket 21641.
15224 o Minor features (fallback directory list):
15225 - Update the fallback directory mirror whitelist and blacklist based
15226 on operator emails. Closes task 21121.
15227 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
15228 December 2016 (of which ~126 were still functional) with a list of
15229 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
15230 2017. Resolves ticket 21564.
15232 o Minor features (hidden services, logging):
15233 - Log a message when a hidden service descriptor has fewer
15234 introduction points than specified in
15235 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
15236 - Log a message when a hidden service reaches its introduction point
15237 circuit limit, and when that limit is reset. Follow up to ticket
15238 21594; closes ticket 21622.
15239 - Warn user if multiple entries in EntryNodes and at least one
15240 HiddenService are used together. Pinning EntryNodes along with a
15241 hidden service can be possibly harmful; for instance see ticket
15242 14917 or 21155. Closes ticket 21155.
15244 o Minor features (linux seccomp2 sandbox):
15245 - We now have a document storage backend compatible with the Linux
15246 seccomp2 sandbox. This backend is used for consensus documents and
15247 diffs between them; in the long term, we'd like to use it for
15248 unparseable directory material too. Closes ticket 21645
15249 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
15250 from 1MB to 16MB. This was necessary with the glibc allocator in
15251 order to allow worker threads to allocate more memory -- which in
15252 turn is necessary because of our new use of worker threads for
15253 compression. Closes ticket 22096.
15255 o Minor features (logging):
15256 - Log files are no longer created world-readable by default.
15257 (Previously, most distributors would store the logs in a non-
15258 world-readable location to prevent inappropriate access. This
15259 change is an extra precaution.) Closes ticket 21729; patch
15262 o Minor features (performance):
15263 - Our Keccak (SHA-3) implementation now accesses memory more
15264 efficiently, especially on little-endian systems. Closes
15266 - Add an O(1) implementation of channel_find_by_global_id(), to
15267 speed some controller functions.
15269 o Minor features (relay, configuration):
15270 - The MyFamily option may now be repeated as many times as desired,
15271 for relays that want to configure large families. Closes ticket
15272 4998; patch by Daniel Pinto.
15274 o Minor features (safety):
15275 - Add an explicit check to extrainfo_parse_entry_from_string() for
15276 NULL inputs. We don't believe this can actually happen, but it may
15277 help silence a warning from the Clang analyzer. Closes
15280 o Minor features (testing):
15281 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
15282 When Tor is compiled with this option, we disable a number of
15283 redundant memory-safety failsafes that are intended to stop bugs
15284 from becoming security issues. This makes it easier to hunt for
15285 bugs that would be security issues without the failsafes turned
15286 on. Closes ticket 21439.
15287 - Add a general event-tracing instrumentation support to Tor. This
15288 subsystem will enable developers and researchers to add fine-
15289 grained instrumentation to their Tor instances, for use when
15290 examining Tor network performance issues. There are no trace
15291 events yet, and event-tracing is off by default unless enabled at
15292 compile time. Implements ticket 13802.
15293 - Improve our version parsing tests: add tests for typical version
15294 components, add tests for invalid versions, including numeric
15295 range and non-numeric prefixes. Unit tests 21278, 21450, and
15296 21507. Partially implements 21470.
15298 o Minor bugfixes (bandwidth accounting):
15299 - Roll over monthly accounting at the configured hour and minute,
15300 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
15301 Found by Andrey Karpov with PVS-Studio.
15303 o Minor bugfixes (code correctness):
15304 - Accurately identify client connections by their lack of peer
15305 authentication. This means that we bail out earlier if asked to
15306 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
15309 o Minor bugfixes (configuration):
15310 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
15311 bug 22252; bugfix on 0.2.9.3-alpha.
15313 o Minor bugfixes (connection lifespan):
15314 - Allow more control over how long TLS connections are kept open:
15315 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
15316 single option called CircuitsAvailableTimeout. Also, allow the
15317 consensus to control the default values for both this preference
15318 and the lifespan of relay-to-relay connections. Fixes bug 17592;
15319 bugfix on 0.2.5.5-alpha.
15320 - Increase the initial circuit build timeout testing frequency, to
15321 help ensure that ReducedConnectionPadding clients finish learning
15322 a timeout before their orconn would expire. The initial testing
15323 rate was set back in the days of TAP and before the Tor Browser
15324 updater, when we had to be much more careful about new clients
15325 making lots of circuits. With this change, a circuit build timeout
15326 is learned in about 15-20 minutes, instead of 100-120 minutes.
15328 o Minor bugfixes (controller):
15329 - GETINFO onions/current and onions/detached no longer respond with
15330 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
15331 - Trigger HS descriptor events on the control port when the client
15332 fails to pick a hidden service directory for a hidden service.
15333 This can happen if all the hidden service directories are in
15334 ExcludeNodes, or they have all been queried within the last 15
15335 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
15337 o Minor bugfixes (directory authority):
15338 - When rejecting a router descriptor for running an obsolete version
15339 of Tor without ntor support, warn about the obsolete tor version,
15340 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
15341 - Prevent the shared randomness subsystem from asserting when
15342 initialized by a bridge authority with an incomplete configuration
15343 file. Fixes bug 21586; bugfix on 0.2.9.8.
15345 o Minor bugfixes (exit-side DNS):
15346 - Fix an untriggerable assertion that checked the output of a
15347 libevent DNS error, so that the assertion actually behaves as
15348 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
15349 Karpov using PVS-Studio.
15351 o Minor bugfixes (fallback directories):
15352 - Make the usage example in updateFallbackDirs.py actually work, and
15353 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
15354 - Decrease the guard flag average required to be a fallback. This
15355 allows us to keep relays that have their guard flag removed when
15356 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15357 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
15358 bugfix on 0.2.8.1-alpha.
15359 - Make sure fallback directory mirrors have the same address, port,
15360 and relay identity key for at least 30 days before they are
15361 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
15363 o Minor bugfixes (hidden services):
15364 - Stop printing a cryptic warning when a hidden service gets a
15365 request to connect to a virtual port that it hasn't configured.
15366 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
15367 - Simplify hidden service descriptor creation by using an existing
15368 flag to check if an introduction point is established. Fixes bug
15369 21599; bugfix on 0.2.7.2-alpha.
15371 o Minor bugfixes (memory leak):
15372 - Fix a small memory leak at exit from the backtrace handler code.
15373 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
15375 o Minor bugfixes (protocol, logging):
15376 - Downgrade a log statement about unexpected relay cells from "bug"
15377 to "protocol warning", because there is at least one use case
15378 where it can be triggered by a buggy tor implementation. Fixes bug
15379 21293; bugfix on 0.1.1.14-alpha.
15381 o Minor bugfixes (testing):
15382 - Use unbuffered I/O for utility functions around the
15383 process_handle_t type. This fixes unit test failures reported on
15384 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
15385 - Make display of captured unit test log messages consistent. Fixes
15386 bug 21510; bugfix on 0.2.9.3-alpha.
15387 - Make test-network.sh always call chutney's test-network.sh.
15388 Previously, this only worked on systems which had bash installed,
15389 due to some bash-specific code in the script. Fixes bug 19699;
15390 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
15392 o Minor bugfixes (voting consistency):
15393 - Reject version numbers with non-numeric prefixes (such as +, -, or
15394 whitespace). Disallowing whitespace prevents differential version
15395 parsing between POSIX-based and Windows platforms. Fixes bug 21507
15396 and part of 21508; bugfix on 0.0.8pre1.
15398 o Minor bugfixes (windows, relay):
15399 - Resolve "Failure from drain_fd: No error" warnings on Windows
15400 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
15402 o Code simplification and refactoring:
15403 - Break up the 630-line function connection_dir_client_reached_eof()
15404 into a dozen smaller functions. This change should help
15405 maintainability and readability of the client directory code.
15406 - Isolate our use of the openssl headers so that they are only
15407 included from our crypto wrapper modules, and from tests that
15408 examine those modules' internals. Closes ticket 21841.
15409 - Simplify our API to launch directory requests, making it more
15410 extensible and less error-prone. Now it's easier to add extra
15411 headers to directory requests. Closes ticket 21646.
15412 - Our base64 decoding functions no longer overestimate the output
15413 space that they need when parsing unpadded inputs. Closes
15415 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
15416 Resolves ticket 22213.
15417 - The logic that directory caches use to spool request to clients,
15418 serving them one part at a time so as not to allocate too much
15419 memory, has been refactored for consistency. Previously there was
15420 a separate spooling implementation per type of spoolable data. Now
15421 there is one common spooling implementation, with extensible data
15422 types. Closes ticket 21651.
15423 - Tor's compression module now supports multiple backends. Part of
15424 the implementation for proposal 278; closes ticket 21663.
15427 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
15428 Closes ticket 21873.
15429 - Correct documentation about the default DataDirectory value.
15430 Closes ticket 21151.
15431 - Document the default behavior of NumEntryGuards and
15432 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
15434 - Document key=value pluggable transport arguments for Bridge lines
15435 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
15436 - Note that bandwidth-limiting options don't affect TCP headers or
15437 DNS. Closes ticket 17170.
15439 o Removed features (configuration options, all in ticket 22060):
15440 - These configuration options are now marked Obsolete, and no longer
15441 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
15442 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
15443 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
15444 in 0.2.9.2-alpha and have now been removed. The previous default
15445 behavior is now always chosen; the previous (less secure) non-
15446 default behavior is now unavailable.
15447 - CloseHSClientCircuitsImmediatelyOnTimeout and
15448 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
15449 0.2.9.2-alpha and now have been removed. HS circuits never close
15450 on circuit build timeout; they have a longer timeout period.
15451 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
15452 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
15453 (and others) to configure listen-only and advertise-only addresses.
15455 o Removed features (tools):
15456 - We've removed the tor-checkkey tool from src/tools. Long ago, we
15457 used it to help people detect RSA keys that were generated by
15458 versions of Debian affected by CVE-2008-0166. But those keys have
15459 been out of circulation for ages, and this tool is no longer
15460 required. Closes ticket 21842.
15463 Changes in version 0.3.0.7 - 2017-05-15
15464 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
15465 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
15466 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
15467 clients are not affected.
15469 o Major bugfixes (hidden service directory, security):
15470 - Fix an assertion failure in the hidden service directory code, which
15471 could be used by an attacker to remotely cause a Tor relay process to
15472 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
15473 should upgrade. This security issue is tracked as TROVE-2017-002.
15474 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
15477 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
15480 o Minor features (future-proofing):
15481 - Tor no longer refuses to download microdescriptors or descriptors
15482 if they are listed as "published in the future". This change will
15483 eventually allow us to stop listing meaningful "published" dates
15484 in microdescriptor consensuses, and thereby allow us to reduce the
15485 resources required to download consensus diffs by over 50%.
15486 Implements part of ticket 21642; implements part of proposal 275.
15488 o Minor bugfixes (Linux seccomp2 sandbox):
15489 - The getpid() system call is now permitted under the Linux seccomp2
15490 sandbox, to avoid crashing with versions of OpenSSL (and other
15491 libraries) that attempt to learn the process's PID by using the
15492 syscall rather than the VDSO code. Fixes bug 21943; bugfix
15496 Changes in version 0.3.0.6 - 2017-04-26
15497 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
15499 With the 0.3.0 series, clients and relays now use Ed25519 keys to
15500 authenticate their link connections to relays, rather than the old
15501 RSA1024 keys that they used before. (Circuit crypto has been
15502 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
15503 the guard selection and replacement algorithm to behave more robustly
15504 in the presence of unreliable networks, and to resist guard-
15507 This series also includes numerous other small features and bugfixes,
15508 along with more groundwork for the upcoming hidden-services revamp.
15510 Per our stable release policy, we plan to support the Tor 0.3.0
15511 release series for at least the next nine months, or for three months
15512 after the first stable release of the 0.3.1 series: whichever is
15513 longer. If you need a release with long-term support, we recommend
15514 that you stay with the 0.2.9 series.
15516 Below are the changes since 0.3.0.5-rc. For a list of all changes
15517 since 0.2.9, see the ReleaseNotes file.
15519 o Minor features (geoip):
15520 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
15523 o Minor bugfixes (control port):
15524 - The GETINFO extra-info/digest/<digest> command was broken because
15525 of a wrong base16 decode return value check, introduced when
15526 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
15528 o Minor bugfixes (crash prevention):
15529 - Fix a (currently untriggerable, but potentially dangerous) crash
15530 bug when base32-encoding inputs whose sizes are not a multiple of
15531 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
15534 Changes in version 0.3.0.5-rc - 2017-04-05
15535 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
15536 0.3.0 release series.
15538 This is the second release candidate in the Tor 0.3.0 series, and has
15539 much fewer changes than the first. If we find no new bugs or
15540 regressions here, the first stable 0.3.0 release will be nearly
15543 o Major bugfixes (crash, directory connections):
15544 - Fix a rare crash when sending a begin cell on a circuit whose
15545 linked directory connection had already been closed. Fixes bug
15546 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
15548 o Major bugfixes (guard selection):
15549 - Fix a guard selection bug where Tor would refuse to bootstrap in
15550 some cases if the user swapped a bridge for another bridge in
15551 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
15552 Reported by "torvlnt33r".
15554 o Minor features (geoip):
15555 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
15558 o Minor bugfix (compilation):
15559 - Fix a warning when compiling hs_service.c. Previously, it had no
15560 exported symbols when compiled for libor.a, resulting in a
15561 compilation warning from clang. Fixes bug 21825; bugfix
15564 o Minor bugfixes (hidden services):
15565 - Make hidden services check for failed intro point connections,
15566 even when they have exceeded their intro point creation limit.
15567 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
15568 - Make hidden services with 8 to 10 introduction points check for
15569 failed circuits immediately after startup. Previously, they would
15570 wait for 5 minutes before performing their first checks. Fixes bug
15571 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
15573 o Minor bugfixes (memory leaks):
15574 - Fix a memory leak when using GETCONF on a port option. Fixes bug
15575 21682; bugfix on 0.3.0.3-alpha.
15577 o Minor bugfixes (relay):
15578 - Avoid a double-marked-circuit warning that could happen when we
15579 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
15582 o Minor bugfixes (tests):
15583 - Run the entry_guard_parse_from_state_full() test with the time set
15584 to a specific date. (The guard state that this test was parsing
15585 contained guards that had expired since the test was first
15586 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
15589 - Update the description of the directory server options in the
15590 manual page, to clarify that a relay no longer needs to set
15591 DirPort in order to be a directory cache. Closes ticket 21720.
15595 Changes in version 0.2.8.13 - 2017-03-03
15596 Tor 0.2.8.13 backports a security fix from later Tor
15597 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
15598 this release, if for some reason they cannot upgrade to a later
15599 release series, and if they build Tor with the --enable-expensive-hardening
15602 Note that support for Tor 0.2.8.x is ending next year: we will not issue
15603 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
15604 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15606 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15607 - Fix an integer underflow bug when comparing malformed Tor
15608 versions. This bug could crash Tor when built with
15609 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15610 0.2.9.8, which were built with -ftrapv by default. In other cases
15611 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15612 on 0.0.8pre1. Found by OSS-Fuzz.
15614 o Minor features (geoip):
15615 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15619 Changes in version 0.2.7.7 - 2017-03-03
15620 Tor 0.2.7.7 backports a number of security fixes from later Tor
15621 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
15622 this release, if for some reason they cannot upgrade to a later
15625 Note that support for Tor 0.2.7.x is ending this year: we will not issue
15626 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
15627 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15629 o Directory authority changes (backport from 0.2.8.5-rc):
15630 - Urras is no longer a directory authority. Closes ticket 19271.
15632 o Directory authority changes (backport from 0.2.9.2-alpha):
15633 - The "Tonga" bridge authority has been retired; the new bridge
15634 authority is "Bifroest". Closes tickets 19728 and 19690.
15636 o Directory authority key updates (backport from 0.2.8.1-alpha):
15637 - Update the V3 identity key for the dannenberg directory authority:
15638 it was changed on 18 November 2015. Closes task 17906. Patch
15641 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15642 - Fix a bug in parsing that could cause clients to read a single
15643 byte past the end of an allocated region. This bug could be used
15644 to cause hardened clients (built with --enable-expensive-hardening)
15645 to crash if they tried to visit a hostile hidden service. Non-
15646 hardened clients are only affected depending on the details of
15647 their platform's memory allocator. Fixes bug 21018; bugfix on
15648 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15649 2016-12-002 and as CVE-2016-1254.
15651 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15652 - Stop a crash that could occur when a client running with DNSPort
15653 received a query with multiple address types, and the first
15654 address type was not supported. Found and fixed by Scott Dial.
15655 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15656 - Prevent a class of security bugs caused by treating the contents
15657 of a buffer chunk as if they were a NUL-terminated string. At
15658 least one such bug seems to be present in all currently used
15659 versions of Tor, and would allow an attacker to remotely crash
15660 most Tor instances, especially those compiled with extra compiler
15661 hardening. With this defense in place, such bugs can't crash Tor,
15662 though we should still fix them as they occur. Closes ticket
15663 20384 (TROVE-2016-10-001).
15665 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15666 - Avoid a difficult-to-trigger heap corruption attack when extending
15667 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15668 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15669 Reported by Guido Vranken.
15671 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15672 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15673 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15675 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15676 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15677 pointer to the previous (uninitialized) key value. The impact here
15678 should be limited to a difficult-to-trigger crash, if OpenSSL is
15679 running an engine that makes key generation failures possible, or
15680 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15681 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15684 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15685 - Fix an integer underflow bug when comparing malformed Tor
15686 versions. This bug could crash Tor when built with
15687 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15688 0.2.9.8, which were built with -ftrapv by default. In other cases
15689 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15690 on 0.0.8pre1. Found by OSS-Fuzz.
15692 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15693 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15694 zero size. Check size argument to memwipe() for underflow. Fixes
15695 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15698 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15699 - Make Tor survive errors involving connections without a
15700 corresponding event object. Previously we'd fail with an
15701 assertion; now we produce a log message. Related to bug 16248.
15703 o Minor features (geoip):
15704 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15708 Changes in version 0.2.6.11 - 2017-03-03
15709 Tor 0.2.6.11 backports a number of security fixes from later Tor
15710 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
15711 this release, if for some reason they cannot upgrade to a later
15714 Note that support for Tor 0.2.6.x is ending this year: we will not issue
15715 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
15716 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15718 o Directory authority changes (backport from 0.2.8.5-rc):
15719 - Urras is no longer a directory authority. Closes ticket 19271.
15721 o Directory authority changes (backport from 0.2.9.2-alpha):
15722 - The "Tonga" bridge authority has been retired; the new bridge
15723 authority is "Bifroest". Closes tickets 19728 and 19690.
15725 o Directory authority key updates (backport from 0.2.8.1-alpha):
15726 - Update the V3 identity key for the dannenberg directory authority:
15727 it was changed on 18 November 2015. Closes task 17906. Patch
15730 o Major features (security fixes, backport from 0.2.9.4-alpha):
15731 - Prevent a class of security bugs caused by treating the contents
15732 of a buffer chunk as if they were a NUL-terminated string. At
15733 least one such bug seems to be present in all currently used
15734 versions of Tor, and would allow an attacker to remotely crash
15735 most Tor instances, especially those compiled with extra compiler
15736 hardening. With this defense in place, such bugs can't crash Tor,
15737 though we should still fix them as they occur. Closes ticket
15738 20384 (TROVE-2016-10-001).
15740 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15741 - Fix a bug in parsing that could cause clients to read a single
15742 byte past the end of an allocated region. This bug could be used
15743 to cause hardened clients (built with --enable-expensive-hardening)
15744 to crash if they tried to visit a hostile hidden service. Non-
15745 hardened clients are only affected depending on the details of
15746 their platform's memory allocator. Fixes bug 21018; bugfix on
15747 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15748 2016-12-002 and as CVE-2016-1254.
15750 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15751 - Stop a crash that could occur when a client running with DNSPort
15752 received a query with multiple address types, and the first
15753 address type was not supported. Found and fixed by Scott Dial.
15754 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15756 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15757 - Fix an error that could cause us to read 4 bytes before the
15758 beginning of an openssl string. This bug could be used to cause
15759 Tor to crash on systems with unusual malloc implementations, or
15760 systems with unusual hardening installed. Fixes bug 17404; bugfix
15763 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15764 - Avoid a difficult-to-trigger heap corruption attack when extending
15765 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15766 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15767 Reported by Guido Vranken.
15769 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15770 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15771 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15773 o Major bugfixes (guard selection, backport from 0.2.7.6):
15774 - Actually look at the Guard flag when selecting a new directory
15775 guard. When we implemented the directory guard design, we
15776 accidentally started treating all relays as if they have the Guard
15777 flag during guard selection, leading to weaker anonymity and worse
15778 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15781 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15782 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15783 pointer to the previous (uninitialized) key value. The impact here
15784 should be limited to a difficult-to-trigger crash, if OpenSSL is
15785 running an engine that makes key generation failures possible, or
15786 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15787 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15790 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15791 - Fix an integer underflow bug when comparing malformed Tor
15792 versions. This bug could crash Tor when built with
15793 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15794 0.2.9.8, which were built with -ftrapv by default. In other cases
15795 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15796 on 0.0.8pre1. Found by OSS-Fuzz.
15798 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15799 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15800 zero size. Check size argument to memwipe() for underflow. Fixes
15801 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15804 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15805 - Make Tor survive errors involving connections without a
15806 corresponding event object. Previously we'd fail with an
15807 assertion; now we produce a log message. Related to bug 16248.
15809 o Minor features (geoip):
15810 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15813 o Minor bugfixes (compilation, backport from 0.2.7.6):
15814 - Fix a compilation warning with Clang 3.6: Do not check the
15815 presence of an address which can never be NULL. Fixes bug 17781.
15818 Changes in version 0.2.5.13 - 2017-03-03
15819 Tor 0.2.5.13 backports a number of security fixes from later Tor
15820 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
15821 this release, if for some reason they cannot upgrade to a later
15824 Note that support for Tor 0.2.5.x is ending next year: we will not issue
15825 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
15826 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
15828 o Directory authority changes (backport from 0.2.8.5-rc):
15829 - Urras is no longer a directory authority. Closes ticket 19271.
15831 o Directory authority changes (backport from 0.2.9.2-alpha):
15832 - The "Tonga" bridge authority has been retired; the new bridge
15833 authority is "Bifroest". Closes tickets 19728 and 19690.
15835 o Directory authority key updates (backport from 0.2.8.1-alpha):
15836 - Update the V3 identity key for the dannenberg directory authority:
15837 it was changed on 18 November 2015. Closes task 17906. Patch
15840 o Major features (security fixes, backport from 0.2.9.4-alpha):
15841 - Prevent a class of security bugs caused by treating the contents
15842 of a buffer chunk as if they were a NUL-terminated string. At
15843 least one such bug seems to be present in all currently used
15844 versions of Tor, and would allow an attacker to remotely crash
15845 most Tor instances, especially those compiled with extra compiler
15846 hardening. With this defense in place, such bugs can't crash Tor,
15847 though we should still fix them as they occur. Closes ticket
15848 20384 (TROVE-2016-10-001).
15850 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15851 - Fix a bug in parsing that could cause clients to read a single
15852 byte past the end of an allocated region. This bug could be used
15853 to cause hardened clients (built with --enable-expensive-hardening)
15854 to crash if they tried to visit a hostile hidden service. Non-
15855 hardened clients are only affected depending on the details of
15856 their platform's memory allocator. Fixes bug 21018; bugfix on
15857 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15858 2016-12-002 and as CVE-2016-1254.
15860 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
15861 - Stop a crash that could occur when a client running with DNSPort
15862 received a query with multiple address types, and the first
15863 address type was not supported. Found and fixed by Scott Dial.
15864 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
15866 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15867 - Fix an error that could cause us to read 4 bytes before the
15868 beginning of an openssl string. This bug could be used to cause
15869 Tor to crash on systems with unusual malloc implementations, or
15870 systems with unusual hardening installed. Fixes bug 17404; bugfix
15873 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15874 - Avoid a difficult-to-trigger heap corruption attack when extending
15875 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15876 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15877 Reported by Guido Vranken.
15879 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15880 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15881 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15883 o Major bugfixes (guard selection, backport from 0.2.7.6):
15884 - Actually look at the Guard flag when selecting a new directory
15885 guard. When we implemented the directory guard design, we
15886 accidentally started treating all relays as if they have the Guard
15887 flag during guard selection, leading to weaker anonymity and worse
15888 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15891 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15892 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15893 pointer to the previous (uninitialized) key value. The impact here
15894 should be limited to a difficult-to-trigger crash, if OpenSSL is
15895 running an engine that makes key generation failures possible, or
15896 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15897 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15900 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15901 - Fix an integer underflow bug when comparing malformed Tor
15902 versions. This bug could crash Tor when built with
15903 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15904 0.2.9.8, which were built with -ftrapv by default. In other cases
15905 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15906 on 0.0.8pre1. Found by OSS-Fuzz.
15908 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15909 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15910 zero size. Check size argument to memwipe() for underflow. Fixes
15911 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15914 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15915 - Make Tor survive errors involving connections without a
15916 corresponding event object. Previously we'd fail with an
15917 assertion; now we produce a log message. Related to bug 16248.
15919 o Minor features (geoip):
15920 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15923 o Minor bugfixes (compilation, backport from 0.2.7.6):
15924 - Fix a compilation warning with Clang 3.6: Do not check the
15925 presence of an address which can never be NULL. Fixes bug 17781.
15927 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
15928 - Check for failures from crypto_early_init, and refuse to continue.
15929 A previous typo meant that we could keep going with an
15930 uninitialized crypto library, and would have OpenSSL initialize
15931 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
15932 when implementing ticket 4900. Patch by "teor".
15934 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
15935 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
15936 a client authorized hidden service. Fixes bug 15823; bugfix
15940 Changes in version 0.2.4.28 - 2017-03-03
15941 Tor 0.2.4.28 backports a number of security fixes from later Tor
15942 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
15943 this release, if for some reason they cannot upgrade to a later
15946 Note that support for Tor 0.2.4.x is ending soon: we will not issue
15947 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
15948 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
15950 o Directory authority changes (backport from 0.2.8.5-rc):
15951 - Urras is no longer a directory authority. Closes ticket 19271.
15953 o Directory authority changes (backport from 0.2.9.2-alpha):
15954 - The "Tonga" bridge authority has been retired; the new bridge
15955 authority is "Bifroest". Closes tickets 19728 and 19690.
15957 o Directory authority key updates (backport from 0.2.8.1-alpha):
15958 - Update the V3 identity key for the dannenberg directory authority:
15959 it was changed on 18 November 2015. Closes task 17906. Patch
15962 o Major features (security fixes, backport from 0.2.9.4-alpha):
15963 - Prevent a class of security bugs caused by treating the contents
15964 of a buffer chunk as if they were a NUL-terminated string. At
15965 least one such bug seems to be present in all currently used
15966 versions of Tor, and would allow an attacker to remotely crash
15967 most Tor instances, especially those compiled with extra compiler
15968 hardening. With this defense in place, such bugs can't crash Tor,
15969 though we should still fix them as they occur. Closes ticket
15970 20384 (TROVE-2016-10-001).
15972 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15973 - Fix a bug in parsing that could cause clients to read a single
15974 byte past the end of an allocated region. This bug could be used
15975 to cause hardened clients (built with --enable-expensive-hardening)
15976 to crash if they tried to visit a hostile hidden service. Non-
15977 hardened clients are only affected depending on the details of
15978 their platform's memory allocator. Fixes bug 21018; bugfix on
15979 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15980 2016-12-002 and as CVE-2016-1254.
15982 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15983 - Fix an error that could cause us to read 4 bytes before the
15984 beginning of an openssl string. This bug could be used to cause
15985 Tor to crash on systems with unusual malloc implementations, or
15986 systems with unusual hardening installed. Fixes bug 17404; bugfix
15989 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15990 - Avoid a difficult-to-trigger heap corruption attack when extending
15991 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15992 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15993 Reported by Guido Vranken.
15995 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15996 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15997 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15999 o Major bugfixes (guard selection, backport from 0.2.7.6):
16000 - Actually look at the Guard flag when selecting a new directory
16001 guard. When we implemented the directory guard design, we
16002 accidentally started treating all relays as if they have the Guard
16003 flag during guard selection, leading to weaker anonymity and worse
16004 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
16007 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
16008 - If OpenSSL fails to generate an RSA key, do not retain a dangling
16009 pointer to the previous (uninitialized) key value. The impact here
16010 should be limited to a difficult-to-trigger crash, if OpenSSL is
16011 running an engine that makes key generation failures possible, or
16012 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
16013 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
16016 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
16017 - Fix an integer underflow bug when comparing malformed Tor
16018 versions. This bug could crash Tor when built with
16019 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16020 0.2.9.8, which were built with -ftrapv by default. In other cases
16021 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16022 on 0.0.8pre1. Found by OSS-Fuzz.
16024 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
16025 - Make memwipe() do nothing when passed a NULL pointer or buffer of
16026 zero size. Check size argument to memwipe() for underflow. Fixes
16027 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
16030 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
16031 - Make Tor survive errors involving connections without a
16032 corresponding event object. Previously we'd fail with an
16033 assertion; now we produce a log message. Related to bug 16248.
16035 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
16036 - Make it harder for attackers to overload hidden services with
16037 introductions, by blocking multiple introduction requests on the
16038 same circuit. Resolves ticket 15515.
16040 o Minor features (geoip):
16041 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16044 o Minor bugfixes (compilation, backport from 0.2.7.6):
16045 - Fix a compilation warning with Clang 3.6: Do not check the
16046 presence of an address which can never be NULL. Fixes bug 17781.
16048 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
16049 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
16050 a client authorized hidden service. Fixes bug 15823; bugfix
16054 Changes in version 0.3.0.4-rc - 2017-03-01
16055 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
16056 0.3.0 release series, and introduces a few reliability features to
16057 keep them from coming back.
16059 This is the first release candidate in the Tor 0.3.0 series. If we
16060 find no new bugs or regressions here, the first stable 0.3.0 release
16061 will be nearly identical to it.
16063 o Major bugfixes (bridges):
16064 - When the same bridge is configured multiple times with the same
16065 identity, but at different address:port combinations, treat those
16066 bridge instances as separate guards. This fix restores the ability
16067 of clients to configure the same bridge with multiple pluggable
16068 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
16070 o Major bugfixes (hidden service directory v3):
16071 - Stop crashing on a failed v3 hidden service descriptor lookup
16072 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
16074 o Major bugfixes (parsing):
16075 - When parsing a malformed content-length field from an HTTP
16076 message, do not read off the end of the buffer. This bug was a
16077 potential remote denial-of-service attack against Tor clients and
16078 relays. A workaround was released in October 2016, to prevent this
16079 bug from crashing Tor. This is a fix for the underlying issue,
16080 which should no longer matter (if you applied the earlier patch).
16081 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
16082 using AFL (http://lcamtuf.coredump.cx/afl/).
16083 - Fix an integer underflow bug when comparing malformed Tor
16084 versions. This bug could crash Tor when built with
16085 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16086 0.2.9.8, which were built with -ftrapv by default. In other cases
16087 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16088 on 0.0.8pre1. Found by OSS-Fuzz.
16090 o Minor feature (protocol versioning):
16091 - Add new protocol version for proposal 224. HSIntro now advertises
16092 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
16094 o Minor features (directory authorities):
16095 - Directory authorities now reject descriptors that claim to be
16096 malformed versions of Tor. Helps prevent exploitation of
16098 - Reject version numbers with components that exceed INT32_MAX.
16099 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16100 Fixes bug 21450; bugfix on 0.0.8pre1.
16101 - Directory authorities now reject relays running versions
16102 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
16103 suffer from bug 20499 and don't keep their consensus cache
16104 up-to-date. Resolves ticket 20509.
16106 o Minor features (geoip):
16107 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16110 o Minor features (reliability, crash):
16111 - Try better to detect problems in buffers where they might grow (or
16112 think they have grown) over 2 GB in size. Diagnostic for
16115 o Minor features (testing):
16116 - During 'make test-network-all', if tor logs any warnings, ask
16117 chutney to output them. Requires a recent version of chutney with
16118 the 21572 patch. Implements 21570.
16120 o Minor bugfixes (certificate expiration time):
16121 - Avoid using link certificates that don't become valid till some
16122 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
16124 o Minor bugfixes (code correctness):
16125 - Repair a couple of (unreachable or harmless) cases of the risky
16126 comparison-by-subtraction pattern that caused bug 21278.
16127 - Remove a redundant check for the UseEntryGuards option from the
16128 options_transition_affects_guards() function. Fixes bug 21492;
16129 bugfix on 0.3.0.1-alpha.
16131 o Minor bugfixes (directory mirrors):
16132 - Allow relays to use directory mirrors without a DirPort: these
16133 relays need to be contacted over their ORPorts using a begindir
16134 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
16135 - Clarify the message logged when a remote relay is unexpectedly
16136 missing an ORPort or DirPort: users were confusing this with a
16137 local port. Fixes another case of bug 20711; bugfix
16140 o Minor bugfixes (guards):
16141 - Don't warn about a missing guard state on timeout-measurement
16142 circuits: they aren't supposed to be using guards. Fixes an
16143 instance of bug 21007; bugfix on 0.3.0.1-alpha.
16144 - Silence a BUG() warning when attempting to use a guard whose
16145 descriptor we don't know, and make this scenario less likely to
16146 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
16148 o Minor bugfixes (hidden service):
16149 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
16150 cells. Previously, we were using sizeof() on a pointer, instead of
16151 the real destination buffer. Fortunately, that value was only used
16152 to double-check that there was enough room--which was already
16153 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
16155 o Minor bugfixes (testing):
16156 - Fix Raspbian build issues related to missing socket errno in
16157 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
16159 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
16160 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
16161 - Use bash in src/test/test-network.sh. This ensures we reliably
16162 call chutney's newer tools/test-network.sh when available. Fixes
16163 bug 21562; bugfix on 0.2.9.1-alpha.
16166 - Small fixes to the fuzzing documentation. Closes ticket 21472.
16169 Changes in version 0.2.9.10 - 2017-03-01
16170 Tor 0.2.9.10 backports a security fix from later Tor release. It also
16171 includes fixes for some major issues affecting directory authorities,
16172 LibreSSL compatibility, and IPv6 correctness.
16174 The Tor 0.2.9.x release series is now marked as a long-term-support
16175 series. We intend to backport security fixes to 0.2.9.x until at
16176 least January of 2020.
16178 o Major bugfixes (directory authority, 0.3.0.3-alpha):
16179 - During voting, when marking a relay as a probable sybil, do not
16180 clear its BadExit flag: sybils can still be bad in other ways
16181 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16184 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
16185 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16186 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16187 exit policy rejects that port on more than an IPv6 /16 of
16188 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16189 which rejected a relay's own IPv6 address by default. Fixes bug
16190 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16192 o Major bugfixes (parsing, also in 0.3.0.4-rc):
16193 - Fix an integer underflow bug when comparing malformed Tor
16194 versions. This bug could crash Tor when built with
16195 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
16196 0.2.9.8, which were built with -ftrapv by default. In other cases
16197 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
16198 on 0.0.8pre1. Found by OSS-Fuzz.
16200 o Minor features (directory authorities, also in 0.3.0.4-rc):
16201 - Directory authorities now reject descriptors that claim to be
16202 malformed versions of Tor. Helps prevent exploitation of
16204 - Reject version numbers with components that exceed INT32_MAX.
16205 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
16206 Fixes bug 21450; bugfix on 0.0.8pre1.
16208 o Minor features (geoip):
16209 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
16212 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
16213 - Autoconf now checks to determine if OpenSSL structures are opaque,
16214 instead of explicitly checking for OpenSSL version numbers. Part
16216 - Support building with recent LibreSSL code that uses opaque
16217 structures. Closes ticket 21359.
16219 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
16220 - Repair a couple of (unreachable or harmless) cases of the risky
16221 comparison-by-subtraction pattern that caused bug 21278.
16223 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
16224 - The tor-resolve command line tool now rejects hostnames over 255
16225 characters in length. Previously, it would silently truncate them,
16226 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16227 Patch by "junglefowl".
16230 Changes in version 0.3.0.3-alpha - 2017-02-03
16231 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
16232 0.3.0.x development series, including some that could cause
16233 authorities to behave badly. There is also a fix for a longstanding
16234 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
16235 includes some smaller features and bugfixes.
16237 The Tor 0.3.0.x release series is now in patch-freeze: no additional
16238 features will be considered for inclusion in 0.3.0.x. We suspect that
16239 some bugs will probably remain, however, and we encourage people to
16242 o Major bugfixes (directory authority):
16243 - During voting, when marking a relay as a probable sybil, do not
16244 clear its BadExit flag: sybils can still be bad in other ways
16245 too. (We still clear the other flags.) Fixes bug 21108; bugfix
16247 - When deciding whether we have just found a router to be reachable,
16248 do not penalize it for not having performed an Ed25519 link
16249 handshake if it does not claim to support an Ed25519 handshake.
16250 Previously, we would treat such relays as non-running. Fixes bug
16251 21107; bugfix on 0.3.0.1-alpha.
16253 o Major bugfixes (entry guards):
16254 - Stop trying to build circuits through entry guards for which we
16255 have no descriptor. Also, stop crashing in the case that we *do*
16256 accidentally try to build a circuit in such a state. Fixes bug
16257 21242; bugfix on 0.3.0.1-alpha.
16259 o Major bugfixes (IPv6 Exits):
16260 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
16261 any IPv6 addresses. Instead, only reject a port over IPv6 if the
16262 exit policy rejects that port on more than an IPv6 /16 of
16263 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
16264 which rejected a relay's own IPv6 address by default. Fixes bug
16265 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
16267 o Minor feature (client):
16268 - Enable IPv6 traffic on the SocksPort by default. To disable this,
16269 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
16271 o Minor feature (fallback scripts):
16272 - Add a check_existing mode to updateFallbackDirs.py, which checks
16273 if fallbacks in the hard-coded list are working. Closes ticket
16274 20174. Patch by haxxpop.
16276 o Minor features (ciphersuite selection):
16277 - Clients now advertise a list of ciphersuites closer to the ones
16278 preferred by Firefox. Closes part of ticket 15426.
16279 - Allow relays to accept a wider range of ciphersuites, including
16280 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
16282 o Minor features (controller, configuration):
16283 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
16284 and so on, now comes with a __*Port variant that will not be saved
16285 to the torrc file by the controller's SAVECONF command. This
16286 change allows TorBrowser to set up a single-use domain socket for
16287 each time it launches Tor. Closes ticket 20956.
16288 - The GETCONF command can now query options that may only be
16289 meaningful in context-sensitive lists. This allows the controller
16290 to query the mixed SocksPort/__SocksPort style options introduced
16291 in feature 20956. Implements ticket 21300.
16293 o Minor features (portability, compilation):
16294 - Autoconf now checks to determine if OpenSSL structures are opaque,
16295 instead of explicitly checking for OpenSSL version numbers. Part
16297 - Support building with recent LibreSSL code that uses opaque
16298 structures. Closes ticket 21359.
16300 o Minor features (relay):
16301 - We now allow separation of exit and relay traffic to different
16302 source IP addresses, using the OutboundBindAddressExit and
16303 OutboundBindAddressOR options respectively. Closes ticket 17975.
16304 Written by Michael Sonntag.
16306 o Minor bugfix (logging):
16307 - Don't recommend the use of Tor2web in non-anonymous mode.
16308 Recommending Tor2web is a bad idea because the client loses all
16309 anonymity. Tor2web should only be used in specific cases by users
16310 who *know* and understand the issues. Fixes bug 21294; bugfix
16313 o Minor bugfixes (client):
16314 - Always recover from failures in extend_info_from_node(), in an
16315 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
16316 bugfix on 0.2.3.1-alpha.
16318 o Minor bugfixes (client, entry guards):
16319 - Fix a bug warning (with backtrace) when we fail a channel that
16320 circuits to fallback directories on it. Fixes bug 21128; bugfix
16322 - Fix a spurious bug warning (with backtrace) when removing an
16323 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
16324 - Fix a bug of the new guard algorithm where tor could stall for up
16325 to 10 minutes before retrying a guard after a long period of no
16326 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
16327 - Do not try to build circuits until we have descriptors for our
16328 primary entry guards. Related to fix for bug 21242.
16330 o Minor bugfixes (configure, autoconf):
16331 - Rename the configure option --enable-expensive-hardening to
16332 --enable-fragile-hardening. Expensive hardening makes the tor
16333 daemon abort when some kinds of issues are detected. Thus, it
16334 makes tor more at risk of remote crashes but safer against RCE or
16335 heartbleed bug category. We now try to explain this issue in a
16336 message from the configure script. Fixes bug 21290; bugfix
16339 o Minor bugfixes (controller):
16340 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
16341 20824; bugfix on 0.3.0.1-alpha.
16343 o Minor bugfixes (hidden service):
16344 - Clean up the code for expiring intro points with no associated
16345 circuits. It was causing, rarely, a service with some expiring
16346 introduction points to not open enough additional introduction
16347 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
16348 - Stop setting the torrc option HiddenServiceStatistics to "0" just
16349 because we're not a bridge or relay. Instead, we preserve whatever
16350 value the user set (or didn't set). Fixes bug 21150; bugfix
16352 - Resolve two possible underflows which could lead to creating and
16353 closing a lot of introduction point circuits in a non-stop loop.
16354 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
16356 o Minor bugfixes (portability):
16357 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
16358 It is supported by OpenBSD itself, and also by most OpenBSD
16359 variants (such as Bitrig). Fixes bug 20980; bugfix
16361 - When mapping a file of length greater than SIZE_MAX, do not
16362 silently truncate its contents. This issue could occur on 32 bit
16363 systems with large file support and files which are larger than 4
16364 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
16366 o Minor bugfixes (tor-resolve):
16367 - The tor-resolve command line tool now rejects hostnames over 255
16368 characters in length. Previously, it would silently truncate them,
16369 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
16370 Patch by "junglefowl".
16372 o Minor bugfixes (Windows services):
16373 - Be sure to initialize the monotonic time subsystem before using
16374 it, even when running as an NT service. Fixes bug 21356; bugfix
16378 Changes in version 0.3.0.2-alpha - 2017-01-23
16379 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
16380 cause relays and clients to crash, even if they were not built with
16381 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16382 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16383 version should upgrade.
16385 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
16386 time-to-live values, makes directory authorities enforce the 1-to-1
16387 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
16388 client-side onion service reachability bug, does better at selecting
16389 the set of fallback directories, and more.
16391 o Major bugfixes (security, also in 0.2.9.9):
16392 - Downgrade the "-ftrapv" option from "always on" to "only on when
16393 --enable-expensive-hardening is provided." This hardening option, like
16394 others, can turn survivable bugs into crashes--and having it on by
16395 default made a (relatively harmless) integer overflow bug into a
16396 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
16399 o Major features (security):
16400 - Change the algorithm used to decide DNS TTLs on client and server
16401 side, to better resist DNS-based correlation attacks like the
16402 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
16403 Feamster. Now relays only return one of two possible DNS TTL
16404 values, and clients are willing to believe DNS TTL values up to 3
16405 hours long. Closes ticket 19769.
16407 o Major features (directory authority, security):
16408 - The default for AuthDirPinKeys is now 1: directory authorities
16409 will reject relays where the RSA identity key matches a previously
16410 seen value, but the Ed25519 key has changed. Closes ticket 18319.
16412 o Major bugfixes (client, guard, crash):
16413 - In circuit_get_global_origin_list(), return the actual list of
16414 origin circuits. The previous version of this code returned the
16415 list of all the circuits, and could have caused strange bugs,
16416 including possible crashes. Fixes bug 21118; bugfix
16419 o Major bugfixes (client, onion service, also in 0.2.9.9):
16420 - Fix a client-side onion service reachability bug, where multiple
16421 socks requests to an onion service (or a single slow request)
16422 could cause us to mistakenly mark some of the service's
16423 introduction points as failed, and we cache that failure so
16424 eventually we run out and can't reach the service. Also resolves a
16425 mysterious "Remote server sent bogus reason code 65021" log
16426 warning. The bug was introduced in ticket 17218, where we tried to
16427 remember the circuit end reason as a uint16_t, which mangled
16428 negative values. Partially fixes bug 21056 and fixes bug 20307;
16429 bugfix on 0.2.8.1-alpha.
16431 o Major bugfixes (DNS):
16432 - Fix a bug that prevented exit nodes from caching DNS records for
16433 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
16435 o Minor features (controller):
16436 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
16437 shared-random values to the controller. Closes ticket 19925.
16439 o Minor features (entry guards):
16440 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
16441 break regression tests.
16442 - Require UseEntryGuards when UseBridges is set, in order to make
16443 sure bridges aren't bypassed. Resolves ticket 20502.
16445 o Minor features (fallback directories):
16446 - Select 200 fallback directories for each release. Closes
16448 - Allow 3 fallback relays per operator, which is safe now that we
16449 are choosing 200 fallback relays. Closes ticket 20912.
16450 - Exclude relays affected by bug 20499 from the fallback list.
16451 Exclude relays from the fallback list if they are running versions
16452 known to be affected by bug 20499, or if in our tests they deliver
16453 a stale consensus (i.e. one that expired more than 24 hours ago).
16454 Closes ticket 20539.
16455 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
16457 - Require fallback directories to have the same address and port for
16458 7 days (now that we have enough relays with this stability).
16459 Relays whose OnionOO stability timer is reset on restart by bug
16460 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
16461 this issue. Closes ticket 20880; maintains short-term fix
16463 - Require fallbacks to have flags for 90% of the time (weighted
16464 decaying average), rather than 95%. This allows at least 73% of
16465 clients to bootstrap in the first 5 seconds without contacting an
16466 authority. Part of ticket 18828.
16467 - Annotate updateFallbackDirs.py with the bandwidth and consensus
16468 weight for each candidate fallback. Closes ticket 20878.
16469 - Make it easier to change the output sort order of fallbacks.
16470 Closes ticket 20822.
16471 - Display the relay fingerprint when downloading consensuses from
16472 fallbacks. Closes ticket 20908.
16474 o Minor features (geoip, also in 0.2.9.9):
16475 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16478 o Minor features (next-gen onion service directories):
16479 - Remove the "EnableOnionServicesV3" consensus parameter that we
16480 introduced in 0.3.0.1-alpha: relays are now always willing to act
16481 as v3 onion service directories. Resolves ticket 19899.
16483 o Minor features (linting):
16484 - Enhance the changes file linter to warn on Tor versions that are
16485 prefixed with "tor-". Closes ticket 21096.
16487 o Minor features (logging):
16488 - In several places, describe unset ed25519 keys as "<unset>",
16489 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
16491 o Minor bugfix (control protocol):
16492 - The reply to a "GETINFO config/names" request via the control
16493 protocol now spells the type "Dependent" correctly. This is a
16494 breaking change in the control protocol. (The field seems to be
16495 ignored by the most common known controllers.) Fixes bug 18146;
16496 bugfix on 0.1.1.4-alpha.
16498 o Minor bugfixes (bug resilience):
16499 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
16500 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
16501 Hans Jerry Illikainen.
16503 o Minor bugfixes (build):
16504 - Replace obsolete Autoconf macros with their modern equivalent and
16505 prevent similar issues in the future. Fixes bug 20990; bugfix
16508 o Minor bugfixes (client, guards):
16509 - Fix bug where Tor would think that there are circuits waiting for
16510 better guards even though those circuits have been freed. Fixes
16511 bug 21142; bugfix on 0.3.0.1-alpha.
16513 o Minor bugfixes (config):
16514 - Don't assert on startup when trying to get the options list and
16515 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
16516 options so of course they aren't ready yet. Fixes bug 21062;
16517 bugfix on 0.2.9.3-alpha.
16519 o Minor bugfixes (controller):
16520 - Make the GETINFO interface for inquiring about entry guards
16521 support the new guards backend. Fixes bug 20823; bugfix
16524 o Minor bugfixes (dead code):
16525 - Remove a redundant check for PidFile changes at runtime in
16526 options_transition_allowed(): this check is already performed
16527 regardless of whether the sandbox is active. Fixes bug 21123;
16528 bugfix on 0.2.5.4-alpha.
16530 o Minor bugfixes (documentation):
16531 - Update the tor manual page to document every option that can not
16532 be changed while tor is running. Fixes bug 21122.
16534 o Minor bugfixes (fallback directories):
16535 - Stop failing when a relay has no uptime data in
16536 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
16537 - Avoid checking fallback candidates' DirPorts if they are down in
16538 OnionOO. When a relay operator has multiple relays, this
16539 prioritizes relays that are up over relays that are down. Fixes
16540 bug 20926; bugfix on 0.2.8.3-alpha.
16541 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
16542 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
16544 o Minor bugfixes (guards, bootstrapping):
16545 - When connecting to a directory guard during bootstrap, do not mark
16546 the guard as successful until we receive a good-looking directory
16547 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
16549 o Minor bugfixes (onion services):
16550 - Fix the config reload pruning of old vs new services so it
16551 actually works when both ephemeral and non-ephemeral services are
16552 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
16553 - Allow the number of introduction points to be as low as 0, rather
16554 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
16556 o Minor bugfixes (IPv6):
16557 - Make IPv6-using clients try harder to find an IPv6 directory
16558 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
16559 - When IPv6 addresses have not been downloaded yet (microdesc
16560 consensus documents don't list relay IPv6 addresses), use hard-
16561 coded addresses for authorities, fallbacks, and configured
16562 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
16563 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
16565 o Minor bugfixes (memory leaks):
16566 - Fix a memory leak when configuring hidden services. Fixes bug
16567 20987; bugfix on 0.3.0.1-alpha.
16569 o Minor bugfixes (portability, also in 0.2.9.9):
16570 - Avoid crashing when Tor is built using headers that contain
16571 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
16572 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
16574 - Fix Libevent detection on platforms without Libevent 1 headers
16575 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
16577 o Minor bugfixes (relay):
16578 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
16579 initializing the keys would reset the DataDirectory to 0700
16580 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
16581 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
16583 o Minor bugfixes (testing):
16584 - Remove undefined behavior from the backtrace generator by removing
16585 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
16587 o Minor bugfixes (unit tests):
16588 - Allow the unit tests to pass even when DNS lookups of bogus
16589 addresses do not fail as expected. Fixes bug 20862 and 20863;
16590 bugfix on unit tests introduced in 0.2.8.1-alpha
16591 through 0.2.9.4-alpha.
16593 o Code simplification and refactoring:
16594 - Refactor code to manipulate global_origin_circuit_list into
16595 separate functions. Closes ticket 20921.
16597 o Documentation (formatting):
16598 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
16599 blocks were incorrectly appearing. Closes ticket 20885.
16601 o Documentation (man page):
16602 - Clarify many options in tor.1 and add some min/max values for
16603 HiddenService options. Closes ticket 21058.
16606 Changes in version 0.2.9.9 - 2017-01-23
16607 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
16608 cause relays and clients to crash, even if they were not built with
16609 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
16610 versions, and also affects 0.3.0.1-alpha: all relays running an affected
16611 version should upgrade.
16613 This release also resolves a client-side onion service reachability
16614 bug, and resolves a pair of small portability issues.
16616 o Major bugfixes (security):
16617 - Downgrade the "-ftrapv" option from "always on" to "only on when
16618 --enable-expensive-hardening is provided." This hardening option,
16619 like others, can turn survivable bugs into crashes -- and having
16620 it on by default made a (relatively harmless) integer overflow bug
16621 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
16622 bugfix on 0.2.9.1-alpha.
16624 o Major bugfixes (client, onion service):
16625 - Fix a client-side onion service reachability bug, where multiple
16626 socks requests to an onion service (or a single slow request)
16627 could cause us to mistakenly mark some of the service's
16628 introduction points as failed, and we cache that failure so
16629 eventually we run out and can't reach the service. Also resolves a
16630 mysterious "Remote server sent bogus reason code 65021" log
16631 warning. The bug was introduced in ticket 17218, where we tried to
16632 remember the circuit end reason as a uint16_t, which mangled
16633 negative values. Partially fixes bug 21056 and fixes bug 20307;
16634 bugfix on 0.2.8.1-alpha.
16636 o Minor features (geoip):
16637 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
16640 o Minor bugfixes (portability):
16641 - Avoid crashing when Tor is built using headers that contain
16642 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
16643 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
16645 - Fix Libevent detection on platforms without Libevent 1 headers
16646 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
16649 Changes in version 0.3.0.1-alpha - 2016-12-19
16650 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
16651 series. It strengthens Tor's link and circuit handshakes by
16652 identifying relays by their Ed25519 keys, improves the algorithm that
16653 clients use to choose and maintain their list of guards, and includes
16654 additional backend support for the next-generation hidden service
16655 design. It also contains numerous other small features and
16656 improvements to security, correctness, and performance.
16658 Below are the changes since 0.2.9.8.
16660 o Major features (guard selection algorithm):
16661 - Tor's guard selection algorithm has been redesigned from the
16662 ground up, to better support unreliable networks and restrictive
16663 sets of entry nodes, and to better resist guard-capture attacks by
16664 hostile local networks. Implements proposal 271; closes
16667 o Major features (next-generation hidden services):
16668 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
16669 prop224 aka "Next Generation Hidden Services". Service and clients
16670 don't use this functionality yet. Closes ticket 19043. Based on
16671 initial code by Alec Heifetz.
16672 - Relays now support the HSDir version 3 protocol, so that they can
16673 can store and serve v3 descriptors. This is part of the next-
16674 generation onion service work detailed in proposal 224. Closes
16677 o Major features (protocol, ed25519 identity keys):
16678 - Relays now use Ed25519 to prove their Ed25519 identities and to
16679 one another, and to clients. This algorithm is faster and more
16680 secure than the RSA-based handshake we've been doing until now.
16681 Implements the second big part of proposal 220; Closes
16683 - Clients now support including Ed25519 identity keys in the EXTEND2
16684 cells they generate. By default, this is controlled by a consensus
16685 parameter, currently disabled. You can turn this feature on for
16686 testing by setting ExtendByEd25519ID in your configuration. This
16687 might make your traffic appear different than the traffic
16688 generated by other users, however. Implements part of ticket
16689 15056; part of proposal 220.
16690 - Relays now understand requests to extend to other relays by their
16691 Ed25519 identity keys. When an Ed25519 identity key is included in
16692 an EXTEND2 cell, the relay will only extend the circuit if the
16693 other relay can prove ownership of that identity. Implements part
16694 of ticket 15056; part of proposal 220.
16696 o Major bugfixes (scheduler):
16697 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
16698 caused the channel scheduler to behave more or less randomly,
16699 rather than preferring channels with higher-priority circuits.
16700 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
16702 o Minor features (controller):
16703 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
16704 rather than "unrecognized." Closes ticket 20389; patch from
16707 o Minor features (diagnostic, directory client):
16708 - Warn when we find an unexpected inconsistency in directory
16709 download status objects. Prevents some negative consequences of
16712 o Minor features (directory authority):
16713 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
16714 default) to control whether authorities should try to probe relays
16715 by their Ed25519 link keys. This option will go away in a few
16716 releases--unless we encounter major trouble in our ed25519 link
16717 protocol rollout, in which case it will serve as a safety option.
16719 o Minor features (directory cache):
16720 - Relays and bridges will now refuse to serve the consensus they
16721 have if they know it is too old for a client to use. Closes
16724 o Minor features (ed25519 link handshake):
16725 - Advertise support for the ed25519 link handshake using the
16726 subprotocol-versions mechanism, so that clients can tell which
16727 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
16729 o Minor features (fingerprinting resistance, authentication):
16730 - Extend the length of RSA keys used for TLS link authentication to
16731 2048 bits. (These weren't used for forward secrecy; for forward
16732 secrecy, we used P256.) Closes ticket 13752.
16734 o Minor features (infrastructure):
16735 - Implement smartlist_add_strdup() function. Replaces the use of
16736 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
16738 o Minor bugfixes (client):
16739 - When clients that use bridges start up with a cached consensus on
16740 disk, they were ignoring it and downloading a new one. Now they
16741 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
16743 o Minor bugfixes (configuration):
16744 - Accept non-space whitespace characters after the severity level in
16745 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
16746 - Support "TByte" and "TBytes" units in options given in bytes.
16747 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
16748 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
16750 o Minor bugfixes (consensus weight):
16751 - Add new consensus method that initializes bw weights to 1 instead
16752 of 0. This prevents a zero weight from making it all the way to
16753 the end (happens in small testing networks) and causing an error.
16754 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
16756 o Minor bugfixes (descriptors):
16757 - Correctly recognise downloaded full descriptors as valid, even
16758 when using microdescriptors as circuits. This affects clients with
16759 FetchUselessDescriptors set, and may affect directory authorities.
16760 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
16762 o Minor bugfixes (directory system):
16763 - Download all consensus flavors, descriptors, and authority
16764 certificates when FetchUselessDescriptors is set, regardless of
16765 whether tor is a directory cache or not. Fixes bug 20667; bugfix
16766 on all recent tor versions.
16767 - Bridges and relays now use microdescriptors (like clients do)
16768 rather than old-style router descriptors. Now bridges will blend
16769 in with clients in terms of the circuits they build. Fixes bug
16770 6769; bugfix on 0.2.3.2-alpha.
16772 o Minor bugfixes (ed25519 certificates):
16773 - Correctly interpret ed25519 certificates that would expire some
16774 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
16776 o Minor bugfixes (hidden services):
16777 - Stop ignoring misconfigured hidden services. Instead, refuse to
16778 start tor until the misconfigurations have been corrected. Fixes
16779 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
16782 o Minor bugfixes (memory leak at exit):
16783 - Fix a small harmless memory leak at exit of the previously unused
16784 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
16787 o Minor bugfixes (util):
16788 - When finishing writing a file to disk, if we were about to replace
16789 the file with the temporary file created before and we fail to
16790 replace it, remove the temporary file so it doesn't stay on disk.
16791 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
16793 o Minor bugfixes (Windows):
16794 - Check for getpagesize before using it to mmap files. This fixes
16795 compilation in some MinGW environments. Fixes bug 20530; bugfix on
16796 0.1.2.1-alpha. Reported by "ice".
16798 o Code simplification and refactoring:
16799 - Abolish all global guard context in entrynodes.c; replace with new
16800 guard_selection_t structure as preparation for proposal 271.
16801 Closes ticket 19858.
16802 - Introduce rend_service_is_ephemeral() that tells if given onion
16803 service is ephemeral. Replace unclear NULL-checkings for service
16804 directory with this function. Closes ticket 20526.
16805 - Extract magic numbers in circuituse.c into defined variables.
16806 - Refactor circuit_is_available_for_use to remove unnecessary check.
16807 - Refactor circuit_predict_and_launch_new for readability and
16808 testability. Closes ticket 18873.
16809 - Refactor large if statement in purpose_needs_anonymity to use
16810 switch statement instead. Closes part of ticket 20077.
16811 - Refactor the hashing API to return negative values for errors, as
16812 is done as throughout the codebase. Closes ticket 20717.
16813 - Remove data structures that were used to index or_connection
16814 objects by their RSA identity digests. These structures are fully
16815 redundant with the similar structures used in the
16816 channel abstraction.
16817 - Remove duplicate code in the channel_write_*cell() functions.
16818 Closes ticket 13827; patch from Pingl.
16819 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
16820 use only purpose_needs_anonymity. Closes part of ticket 20077.
16821 - The code to generate and parse EXTEND and EXTEND2 cells has been
16822 replaced with code automatically generated by the
16826 - Include the "TBits" unit in Tor's man page. Fixes part of bug
16827 20622; bugfix on 0.2.5.1-alpha.
16828 - Change '1' to 'weight_scale' in consensus bw weights calculation
16829 comments, as that is reality. Closes ticket 20273. Patch
16831 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
16832 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
16834 - Stop the man page from incorrectly stating that HiddenServiceDir
16835 must already exist. Fixes 20486.
16836 - Clarify that when ClientRejectInternalAddresses is enabled (which
16837 is the default), multicast DNS hostnames for machines on the local
16838 network (of the form *.local) are also rejected. Closes
16841 o Removed features:
16842 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
16843 limit for relays running on a single IP applies to authority IP
16844 addresses as well as to non-authority IP addresses. Closes
16846 - The UseDirectoryGuards torrc option no longer exists: all users
16847 that use entry guards will also use directory guards. Related to
16848 proposal 271; implements part of ticket 20831.
16851 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
16852 from "overcaffeinated".
16853 - Perform the coding style checks when running the tests and fail
16854 when coding style violations are found. Closes ticket 5500.
16855 - Add tests for networkstatus_compute_bw_weights_v10.
16856 - Add unit tests circuit_predict_and_launch_new.
16857 - Extract dummy_origin_circuit_new so it can be used by other
16861 Changes in version 0.2.8.12 - 2016-12-19
16862 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
16863 below) where Tor clients could crash when attempting to visit a
16864 hostile hidden service. Clients are recommended to upgrade as packages
16865 become available for their systems.
16867 It also includes an updated list of fallback directories, backported
16870 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
16871 backported to 0.2.8 in the future.
16873 o Major bugfixes (parsing, security, backported from 0.2.9.8):
16874 - Fix a bug in parsing that could cause clients to read a single
16875 byte past the end of an allocated region. This bug could be used
16876 to cause hardened clients (built with --enable-expensive-hardening)
16877 to crash if they tried to visit a hostile hidden service. Non-
16878 hardened clients are only affected depending on the details of
16879 their platform's memory allocator. Fixes bug 21018; bugfix on
16880 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16881 2016-12-002 and as CVE-2016-1254.
16883 o Minor features (fallback directory list, backported from 0.2.9.8):
16884 - Replace the 81 remaining fallbacks of the 100 originally
16885 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
16886 fallbacks (123 new, 54 existing, 27 removed) generated in December
16887 2016. Resolves ticket 20170.
16889 o Minor features (geoip, backported from 0.2.9.7-rc):
16890 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
16894 Changes in version 0.2.9.8 - 2016-12-19
16895 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
16897 The Tor 0.2.9 series makes mandatory a number of security features
16898 that were formerly optional. It includes support for a new shared-
16899 randomness protocol that will form the basis for next generation
16900 hidden services, includes a single-hop hidden service mode for
16901 optimizing .onion services that don't actually want to be hidden,
16902 tries harder not to overload the directory authorities with excessive
16903 downloads, and supports a better protocol versioning scheme for
16904 improved compatibility with other implementations of the Tor protocol.
16906 And of course, there are numerous other bugfixes and improvements.
16908 This release also includes a fix for a medium-severity issue (bug
16909 21018 below) where Tor clients could crash when attempting to visit a
16910 hostile hidden service. Clients are recommended to upgrade as packages
16911 become available for their systems.
16913 Below are the changes since 0.2.9.7-rc. For a list of all changes
16914 since 0.2.8, see the ReleaseNotes file.
16916 o Major bugfixes (parsing, security):
16917 - Fix a bug in parsing that could cause clients to read a single
16918 byte past the end of an allocated region. This bug could be used
16919 to cause hardened clients (built with --enable-expensive-hardening)
16920 to crash if they tried to visit a hostile hidden service. Non-
16921 hardened clients are only affected depending on the details of
16922 their platform's memory allocator. Fixes bug 21018; bugfix on
16923 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
16924 2016-12-002 and as CVE-2016-1254.
16926 o Minor features (fallback directory list):
16927 - Replace the 81 remaining fallbacks of the 100 originally
16928 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
16929 fallbacks (123 new, 54 existing, 27 removed) generated in December
16930 2016. Resolves ticket 20170.
16933 Changes in version 0.2.9.7-rc - 2016-12-12
16934 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
16935 including a few that had prevented tests from passing on
16938 o Minor features (geoip):
16939 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
16942 o Minor bugfix (build):
16943 - The current Git revision when building from a local repository is
16944 now detected correctly when using git worktrees. Fixes bug 20492;
16945 bugfix on 0.2.3.9-alpha.
16947 o Minor bugfixes (directory authority):
16948 - When computing old Tor protocol line version in protover, we were
16949 looking at 0.2.7.5 twice instead of a specific case for
16950 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
16952 o Minor bugfixes (download scheduling):
16953 - Resolve a "bug" warning when considering a download schedule whose
16954 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
16956 o Minor bugfixes (logging):
16957 - Downgrade a harmless log message about the
16958 pending_entry_connections list from "warn" to "info". Mitigates
16961 o Minor bugfixes (memory leak):
16962 - Fix a small memory leak when receiving AF_UNIX connections on a
16963 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
16964 - When moving a signed descriptor object from a source to an
16965 existing destination, free the allocated memory inside that
16966 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
16968 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
16969 - Fix a memory leak and use-after-free error when removing entries
16970 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
16971 0.2.5.5-alpha. Patch from "cypherpunks".
16973 o Minor bugfixes (portability):
16974 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
16975 Fixes bug 20935; bugfix on 0.2.9.6-rc.
16977 o Minor bugfixes (unit tests):
16978 - Stop expecting NetBSD unit tests to report success for ipfw. Part
16979 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
16980 - Fix tolerances in unit tests for monotonic time comparisons
16981 between nanoseconds and microseconds. Previously, we accepted a 10
16982 us difference only, which is not realistic on every platform's
16983 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
16984 - Remove a double-free in the single onion service unit test. Stop
16985 ignoring a return value. Make future changes less error-prone.
16986 Fixes bug 20864; bugfix on 0.2.9.6-rc.
16989 Changes in version 0.2.8.11 - 2016-12-08
16990 Tor 0.2.8.11 backports fixes for additional portability issues that
16991 could prevent Tor from building correctly on OSX Sierra, or with
16992 OpenSSL 1.1. Affected users should upgrade; others can safely stay
16995 o Minor bugfixes (portability):
16996 - Avoid compilation errors when building on OSX Sierra. Sierra began
16997 to support the getentropy() and clock_gettime() APIs, but created
16998 a few problems in doing so. Tor 0.2.9 has a more thorough set of
16999 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
17000 monotonic time interfaces. Fixes bug 20865. Bugfix
17003 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17004 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17005 architectures. Closes ticket 20588.
17008 Changes in version 0.2.8.10 - 2016-12-02
17009 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
17010 unusable after they left standby mode. It also backports fixes for
17011 a few portability issues and a small but problematic memory leak.
17013 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
17014 - When Tor leaves standby because of a new application request, open
17015 circuits as needed to serve that request. Previously, we would
17016 potentially wait a very long time. Fixes part of bug 19969; bugfix
17019 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
17020 - Clients now respond to new application stream requests immediately
17021 when they arrive, rather than waiting up to one second before
17022 starting to handle them. Fixes part of bug 19969; bugfix
17025 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
17026 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17027 successfully targeting earlier versions of OSX. Resolves
17030 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
17031 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17032 20551; bugfix on 0.2.1.1-alpha.
17034 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
17035 - Work around a memory leak in OpenSSL 1.1 when encoding public
17036 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17038 o Minor features (geoip):
17039 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17042 Changes in version 0.2.9.6-rc - 2016-12-02
17043 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
17044 version. We hope that it will be ready to become stable soon, and we
17045 encourage everyone to test this release. If no showstopper bugs are
17046 found here, the next 0.2.9 release will be stable.
17048 o Major bugfixes (relay, resolver, logging):
17049 - For relays that don't know their own address, avoid attempting a
17050 local hostname resolve for each descriptor we download. This
17051 will cut down on the number of "Success: chose address 'x.x.x.x'"
17052 log lines, and also avoid confusing clock jumps if the resolver
17053 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
17055 o Minor bugfixes (client, fascistfirewall):
17056 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
17057 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
17059 o Minor bugfixes (hidden services):
17060 - Stop ignoring the anonymity status of saved keys for hidden
17061 services and single onion services when first starting tor.
17062 Instead, refuse to start tor if any hidden service key has been
17063 used in a different hidden service anonymity mode. Fixes bug
17064 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
17066 o Minor bugfixes (portability):
17067 - Work around a bug in the OSX 10.12 SDK that would prevent us from
17068 successfully targeting earlier versions of OSX. Resolves
17070 - Run correctly when built on Windows build environments that
17071 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
17073 o Minor bugfixes (single onion services, Tor2web):
17074 - Stop complaining about long-term one-hop circuits deliberately
17075 created by single onion services and Tor2web. These log messages
17076 are intended to diagnose issue 8387, which relates to circuits
17077 hanging around forever for no reason. Fixes bug 20613; bugfix on
17078 0.2.9.1-alpha. Reported by "pastly".
17080 o Minor bugfixes (unit tests):
17081 - Stop spurious failures in the local interface address discovery
17082 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
17086 - Correct the minimum bandwidth value in torrc.sample, and queue a
17087 corresponding change for torrc.minimal. Closes ticket 20085.
17090 Changes in version 0.2.9.5-alpha - 2016-11-08
17091 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
17092 version. We believe one or two probably remain, and we encourage
17093 everyone to test this release.
17095 o Major bugfixes (client performance):
17096 - Clients now respond to new application stream requests immediately
17097 when they arrive, rather than waiting up to one second before
17098 starting to handle them. Fixes part of bug 19969; bugfix
17101 o Major bugfixes (client reliability):
17102 - When Tor leaves standby because of a new application request, open
17103 circuits as needed to serve that request. Previously, we would
17104 potentially wait a very long time. Fixes part of bug 19969; bugfix
17107 o Major bugfixes (download scheduling):
17108 - When using an exponential backoff schedule, do not give up on
17109 downloading just because we have failed a bunch of times. Since
17110 each delay is longer than the last, retrying indefinitely won't
17111 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
17112 - If a consensus expires while we are waiting for certificates to
17113 download, stop waiting for certificates.
17114 - If we stop waiting for certificates less than a minute after we
17115 started downloading them, do not consider the certificate download
17116 failure a separate failure. Fixes bug 20533; bugfix
17118 - Remove the maximum delay on exponential-backoff scheduling. Since
17119 we now allow an infinite number of failures (see ticket 20536), we
17120 must now allow the time to grow longer on each failure. Fixes part
17121 of bug 20534; bugfix on 0.2.9.1-alpha.
17122 - Make our initial download delays closer to those from 0.2.8. Fixes
17123 another part of bug 20534; bugfix on 0.2.9.1-alpha.
17124 - When determining when to download a directory object, handle times
17125 after 2038 if the operating system supports them. (Someday this
17126 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
17127 - When using exponential backoff in test networks, use a lower
17128 exponent, so the delays do not vary as much. This helps test
17129 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
17131 o Minor features (geoip):
17132 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
17135 o Minor bugfixes (client directory scheduling):
17136 - Treat "relay too busy to answer request" as a failed request and a
17137 reason to back off on our retry frequency. This is safe now that
17138 exponential backoffs retry indefinitely, and avoids a bug where we
17139 would reset our download schedule erroneously. Fixes bug 20593;
17140 bugfix on 0.2.9.1-alpha.
17142 o Minor bugfixes (client, logging):
17143 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
17144 assume all nodes support EXTEND2. Use ntor whenever a key is
17145 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
17146 - On DNSPort, stop logging a BUG warning on a failed hostname
17147 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
17149 o Minor bugfixes (hidden services):
17150 - When configuring hidden services, check every hidden service
17151 directory's permissions. Previously, we only checked the last
17152 hidden service. Fixes bug 20529; bugfix the work to fix 13942
17155 o Minor bugfixes (portability):
17156 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
17157 architectures. Closes ticket 20588.
17158 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
17159 removed the ECDH ciphers which caused the tests to fail on
17160 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
17161 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
17162 20551; bugfix on 0.2.1.1-alpha.
17164 o Minor bugfixes (relay bootstrap):
17165 - Ensure relays don't make multiple connections during bootstrap.
17166 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
17168 o Minor bugfixes (relay):
17169 - Work around a memory leak in OpenSSL 1.1 when encoding public
17170 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
17171 - Avoid a small memory leak when informing worker threads about
17172 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
17173 - Do not try to parallelize workers more than 16x without the user
17174 explicitly configuring us to do so, even if we do detect more than
17175 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17177 o Minor bugfixes (single onion services):
17178 - Start correctly when creating a single onion service in a
17179 directory that did not previously exist. Fixes bug 20484; bugfix
17182 o Minor bugfixes (testing):
17183 - Avoid a unit test failure on systems with over 16 detectable CPU
17184 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
17187 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
17188 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
17189 - Module-level documentation for several more modules. Closes
17190 tickets 19287 and 19290.
17193 Changes in version 0.2.8.9 - 2016-10-17
17194 Tor 0.2.8.9 backports a fix for a security hole in previous versions
17195 of Tor that would allow a remote attacker to crash a Tor client,
17196 hidden service, relay, or authority. All Tor users should upgrade to
17197 this version, or to 0.2.9.4-alpha. Patches will be released for older
17200 o Major features (security fixes, also in 0.2.9.4-alpha):
17201 - Prevent a class of security bugs caused by treating the contents
17202 of a buffer chunk as if they were a NUL-terminated string. At
17203 least one such bug seems to be present in all currently used
17204 versions of Tor, and would allow an attacker to remotely crash
17205 most Tor instances, especially those compiled with extra compiler
17206 hardening. With this defense in place, such bugs can't crash Tor,
17207 though we should still fix them as they occur. Closes ticket
17208 20384 (TROVE-2016-10-001).
17210 o Minor features (geoip):
17211 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17215 Changes in version 0.2.9.4-alpha - 2016-10-17
17216 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
17217 that would allow a remote attacker to crash a Tor client, hidden
17218 service, relay, or authority. All Tor users should upgrade to this
17219 version, or to 0.2.8.9. Patches will be released for older versions
17222 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
17223 previous versions of Tor, including the implementation of a feature to
17224 future- proof the Tor ecosystem against protocol changes, some bug
17225 fixes necessary for Tor Browser to use unix domain sockets correctly,
17226 and several portability improvements. We anticipate that this will be
17227 the last alpha in the Tor 0.2.9 series, and that the next release will
17228 be a release candidate.
17230 o Major features (security fixes):
17231 - Prevent a class of security bugs caused by treating the contents
17232 of a buffer chunk as if they were a NUL-terminated string. At
17233 least one such bug seems to be present in all currently used
17234 versions of Tor, and would allow an attacker to remotely crash
17235 most Tor instances, especially those compiled with extra compiler
17236 hardening. With this defense in place, such bugs can't crash Tor,
17237 though we should still fix them as they occur. Closes ticket
17238 20384 (TROVE-2016-10-001).
17240 o Major features (subprotocol versions):
17241 - Tor directory authorities now vote on a set of recommended
17242 subprotocol versions, and on a set of required subprotocol
17243 versions. Clients and relays that lack support for a _required_
17244 subprotocol version will not start; those that lack support for a
17245 _recommended_ subprotocol version will warn the user to upgrade.
17246 Closes ticket 19958; implements part of proposal 264.
17247 - Tor now uses "subprotocol versions" to indicate compatibility.
17248 Previously, versions of Tor looked at the declared Tor version of
17249 a relay to tell whether they could use a given feature. Now, they
17250 should be able to rely on its declared subprotocol versions. This
17251 change allows compatible implementations of the Tor protocol(s) to
17252 exist without pretending to be 100% bug-compatible with particular
17253 releases of Tor itself. Closes ticket 19958; implements part of
17256 o Minor feature (fallback directories):
17257 - Remove broken fallbacks from the hard-coded fallback directory
17258 list. Closes ticket 20190; patch by teor.
17260 o Minor features (client, directory):
17261 - Since authorities now omit all routers that lack the Running and
17262 Valid flags, we assume that any relay listed in the consensus must
17263 have those flags. Closes ticket 20001; implements part of
17266 o Minor features (compilation, portability):
17267 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
17270 o Minor features (development tools, etags):
17271 - Teach the "make tags" Makefile target how to correctly find
17272 "MOCK_IMPL" function definitions. Patch from nherring; closes
17275 o Minor features (geoip):
17276 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
17279 o Minor features (unix domain sockets):
17280 - When configuring a unix domain socket for a SocksPort,
17281 ControlPort, or Hidden service, you can now wrap the address in
17282 quotes, using C-style escapes inside the quotes. This allows unix
17283 domain socket paths to contain spaces.
17285 o Minor features (virtual addresses):
17286 - Increase the maximum number of bits for the IPv6 virtual network
17287 prefix from 16 to 104. In this way, the condition for address
17288 allocation is less restrictive. Closes ticket 20151; feature
17291 o Minor bugfixes (address discovery):
17292 - Stop reordering IP addresses returned by the OS. This makes it
17293 more likely that Tor will guess the same relay IP address every
17294 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
17295 Reported by René Mayrhofer, patch by "cypherpunks".
17297 o Minor bugfixes (client, unix domain sockets):
17298 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
17299 the client address is meaningless. Fixes bug 20261; bugfix
17302 o Minor bugfixes (compilation, OpenBSD):
17303 - Detect Libevent2 functions correctly on systems that provide
17304 libevent2, but where libevent1 is linked with -levent. Fixes bug
17305 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
17307 o Minor bugfixes (configuration):
17308 - When parsing quoted configuration values from the torrc file,
17309 handle windows line endings correctly. Fixes bug 19167; bugfix on
17310 0.2.0.16-alpha. Patch from "Pingl".
17312 o Minor bugfixes (getpass):
17313 - Defensively fix a non-triggerable heap corruption at do_getpass()
17314 to protect ourselves from mistakes in the future. Fixes bug
17315 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
17318 o Minor bugfixes (hidden service):
17319 - Allow hidden services to run on IPv6 addresses even when the
17320 IPv6Exit option is not set. Fixes bug 18357; bugfix
17324 - Add module-level internal documentation for 36 C files that
17325 previously didn't have a high-level overview. Closes ticket #20385.
17327 o Required libraries:
17328 - When building with OpenSSL, Tor now requires version 1.0.1 or
17329 later. OpenSSL 1.0.0 and earlier are no longer supported by the
17330 OpenSSL team, and should not be used. Closes ticket 20303.
17333 Changes in version 0.2.9.3-alpha - 2016-09-23
17334 Tor 0.2.9.3-alpha adds improved support for entities that want to make
17335 high-performance services available through the Tor .onion mechanism
17336 without themselves receiving anonymity as they host those services. It
17337 also tries harder to ensure that all steps on a circuit are using the
17338 strongest crypto possible, strengthens some TLS properties, and
17339 resolves several bugs -- including a pair of crash bugs from the 0.2.8
17340 series. Anybody running an earlier version of 0.2.9.x should upgrade.
17342 o Major bugfixes (crash, also in 0.2.8.8):
17343 - Fix a complicated crash bug that could affect Tor clients
17344 configured to use bridges when replacing a networkstatus consensus
17345 in which one of their bridges was mentioned. OpenBSD users saw
17346 more crashes here, but all platforms were potentially affected.
17347 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17349 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
17350 - Fix a timing-dependent assertion failure that could occur when we
17351 tried to flush from a circuit after having freed its cells because
17352 of an out-of-memory condition. Fixes bug 20203; bugfix on
17353 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17356 o Major features (circuit building, security):
17357 - Authorities, relays and clients now require ntor keys in all
17358 descriptors, for all hops (except for rare hidden service protocol
17359 cases), for all circuits, and for all other roles. Part of
17361 - Tor authorities, relays, and clients only use ntor, except for
17362 rare cases in the hidden service protocol. Part of ticket 19163.
17364 o Major features (single-hop "hidden" services):
17365 - Add experimental HiddenServiceSingleHopMode and
17366 HiddenServiceNonAnonymousMode options. When both are set to 1,
17367 every hidden service on a Tor instance becomes a non-anonymous
17368 Single Onion Service. Single Onions make one-hop (direct)
17369 connections to their introduction and rendezvous points. One-hop
17370 circuits make Single Onion servers easily locatable, but clients
17371 remain location-anonymous. This is compatible with the existing
17372 hidden service implementation, and works on the current tor
17373 network without any changes to older relays or clients. Implements
17374 proposal 260, completes ticket 17178. Patch by teor and asn.
17376 o Major features (resource management):
17377 - Tor can now notice it is about to run out of sockets, and
17378 preemptively close connections of lower priority. (This feature is
17379 off by default for now, since the current prioritizing method is
17380 yet not mature enough. You can enable it by setting
17381 "DisableOOSCheck 0", but watch out: it might close some sockets
17382 you would rather have it keep.) Closes ticket 18640.
17384 o Major bugfixes (circuit building):
17385 - Hidden service client-to-intro-point and service-to-rendezvous-
17386 point circuits use the TAP key supplied by the protocol, to avoid
17387 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
17389 o Major bugfixes (compilation, OpenBSD):
17390 - Fix a Libevent-detection bug in our autoconf script that would
17391 prevent Tor from linking successfully on OpenBSD. Patch from
17392 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
17394 o Major bugfixes (hidden services):
17395 - Clients now require hidden services to include the TAP keys for
17396 their intro points in the hidden service descriptor. This prevents
17397 an inadvertent upgrade to ntor, which a malicious hidden service
17398 could use to distinguish clients by consensus version. Fixes bug
17399 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
17401 o Minor features (security, TLS):
17402 - Servers no longer support clients that without AES ciphersuites.
17403 (3DES is no longer considered an acceptable cipher.) We believe
17404 that no such Tor clients currently exist, since Tor has required
17405 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
17407 o Minor feature (fallback directories):
17408 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17409 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17410 2016. Closes ticket 20190; patch by teor.
17412 o Minor features (geoip, also in 0.2.8.8):
17413 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17416 o Minor feature (port flags):
17417 - Add new flags to the *Port options to finer control over which
17418 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
17419 and the synthetic flag OnionTrafficOnly, which is equivalent to
17420 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
17421 18693; patch by "teor".
17423 o Minor features (directory authority):
17424 - After voting, if the authorities decide that a relay is not
17425 "Valid", they no longer include it in the consensus at all. Closes
17426 ticket 20002; implements part of proposal 272.
17428 o Minor features (testing):
17429 - Disable memory protections on OpenBSD when performing our unit
17430 tests for memwipe(). The test deliberately invokes undefined
17431 behavior, and the OpenBSD protections interfere with this. Patch
17432 from "rubiate". Closes ticket 20066.
17434 o Minor features (testing, ipv6):
17435 - Add the single-onion and single-onion-ipv6 chutney targets to
17436 "make test-network-all". This requires a recent chutney version
17437 with the single onion network flavours (git c72a652 or later).
17438 Closes ticket 20072; patch by teor.
17439 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
17440 tests. Remove bridges+hs, as it's somewhat redundant. This
17441 requires a recent chutney version that supports IPv6 clients,
17442 relays, and authorities. Closes ticket 20069; patch by teor.
17444 o Minor features (Tor2web):
17445 - Make Tor2web clients respect ReachableAddresses. This feature was
17446 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
17447 0.2.8.7. Implements feature 20034. Patch by teor.
17449 o Minor features (unit tests):
17450 - We've done significant work to make the unit tests run faster.
17451 - Our link-handshake unit tests now check that when invalid
17452 handshakes fail, they fail with the error messages we expected.
17453 - Our unit testing code that captures log messages no longer
17454 prevents them from being written out if the user asked for them
17455 (by passing --debug or --info or or --notice --warn to the "test"
17456 binary). This change prevents us from missing unexpected log
17457 messages simply because we were looking for others. Related to
17459 - The unit tests now log all warning messages with the "BUG" flag.
17460 Previously, they only logged errors by default. This change will
17461 help us make our testing code more correct, and make sure that we
17462 only hit this code when we mean to. In the meantime, however,
17463 there will be more warnings in the unit test logs than before.
17464 This is preparatory work for ticket 19999.
17465 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
17466 assertion as a test failure.
17468 o Minor bug fixes (circuits):
17469 - Use the CircuitBuildTimeout option whenever
17470 LearnCircuitBuildTimeout is disabled. Previously, we would respect
17471 the option when a user disabled it, but not when it was disabled
17472 because some other option was set. Fixes bug 20073; bugfix on
17473 0.2.4.12-alpha. Patch by teor.
17475 o Minor bugfixes (allocation):
17476 - Change how we allocate memory for large chunks on buffers, to
17477 avoid a (currently impossible) integer overflow, and to waste less
17478 space when allocating unusually large chunks. Fixes bug 20081;
17479 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
17480 - Always include orconfig.h before including any other C headers.
17481 Sometimes, it includes macros that affect the behavior of the
17482 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
17483 first version to use AC_USE_SYSTEM_EXTENSIONS).
17484 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
17485 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
17486 Patch from Gisle Vanem.
17487 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
17488 They apparently require a set of annotations that we aren't
17489 currently using, and they create false positives in our pthreads
17490 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
17492 o Minor bugfixes (directory authority):
17493 - Die with a more useful error when the operator forgets to place
17494 the authority_signing_key file into the keys directory. This
17495 avoids an uninformative assert & traceback about having an invalid
17496 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
17497 - When allowing private addresses, mark Exits that only exit to
17498 private locations as such. Fixes bug 20064; bugfix
17501 o Minor bugfixes (documentation):
17502 - Document the default PathsNeededToBuildCircuits value that's used
17503 by clients when the directory authorities don't set
17504 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
17505 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
17506 - Fix manual for the User option: it takes a username, not a UID.
17507 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
17510 o Minor bugfixes (hidden services):
17511 - Stop logging intro point details to the client log on certain
17512 error conditions. Fixed as part of bug 20012; bugfix on
17513 0.2.4.8-alpha. Patch by teor.
17515 o Minor bugfixes (IPv6, testing):
17516 - Check for IPv6 correctly on Linux when running test networks.
17517 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
17519 o Minor bugfixes (Linux seccomp2 sandbox):
17520 - Add permission to run the sched_yield() and sigaltstack() system
17521 calls, in order to support versions of Tor compiled with asan or
17522 ubsan code that use these calls. Now "sandbox 1" and
17523 "--enable-expensive-hardening" should be compatible on more
17524 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
17526 o Minor bugfixes (logging):
17527 - When logging a message from the BUG() macro, be explicit about
17528 what we were asserting. Previously we were confusing what we were
17529 asserting with what the bug was. Fixes bug 20093; bugfix
17531 - When we are unable to remove the bw_accounting file, do not warn
17532 if the reason we couldn't remove it was that it didn't exist.
17533 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
17535 o Minor bugfixes (option parsing):
17536 - Count unix sockets when counting client listeners (SOCKS, Trans,
17537 NATD, and DNS). This has no user-visible behaviour changes: these
17538 options are set once, and never read. Required for correct
17539 behaviour in ticket 17178. Fixes bug 19677; bugfix on
17540 0.2.6.3-alpha. Patch by teor.
17542 o Minor bugfixes (options):
17543 - Check the consistency of UseEntryGuards and EntryNodes more
17544 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
17546 - Stop changing the configured value of UseEntryGuards on
17547 authorities and Tor2web clients. Fixes bug 20074; bugfix on
17548 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
17551 o Minor bugfixes (Tor2web):
17552 - Prevent Tor2web clients running hidden services, these services
17553 are not anonymous due to the one-hop client paths. Fixes bug
17554 19678. Patch by teor.
17556 o Minor bugfixes (unit tests):
17557 - Fix a shared-random unit test that was failing on big endian
17558 architectures due to internal representation of a integer copied
17559 to a buffer. The test is changed to take a full 32 bytes of data
17560 and use the output of a python script that make the COMMIT and
17561 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
17563 - The tor_tls_server_info_callback unit test no longer crashes when
17564 debug-level logging is turned on. Fixes bug 20041; bugfix
17568 Changes in version 0.2.8.8 - 2016-09-23
17569 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
17570 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
17571 who select public relays as their bridges.
17573 o Major bugfixes (crash):
17574 - Fix a complicated crash bug that could affect Tor clients
17575 configured to use bridges when replacing a networkstatus consensus
17576 in which one of their bridges was mentioned. OpenBSD users saw
17577 more crashes here, but all platforms were potentially affected.
17578 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
17580 o Major bugfixes (relay, OOM handler):
17581 - Fix a timing-dependent assertion failure that could occur when we
17582 tried to flush from a circuit after having freed its cells because
17583 of an out-of-memory condition. Fixes bug 20203; bugfix on
17584 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
17587 o Minor feature (fallback directories):
17588 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
17589 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
17590 2016. Closes ticket 20190; patch by teor.
17592 o Minor features (geoip):
17593 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
17597 Changes in version 0.2.9.2-alpha - 2016-08-24
17598 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
17599 several new features and bugfixes. It also includes an important
17600 authority update and an important bugfix from 0.2.8.7. Everyone who
17601 sets the ReachableAddresses option, and all bridges, are strongly
17602 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
17604 o Directory authority changes (also in 0.2.8.7):
17605 - The "Tonga" bridge authority has been retired; the new bridge
17606 authority is "Bifroest". Closes tickets 19728 and 19690.
17608 o Major bugfixes (client, security, also in 0.2.8.7):
17609 - Only use the ReachableAddresses option to restrict the first hop
17610 in a path. In earlier versions of 0.2.8.x, it would apply to
17611 every hop in the path, with a possible degradation in anonymity
17612 for anyone using an uncommon ReachableAddress setting. Fixes bug
17613 19973; bugfix on 0.2.8.2-alpha.
17615 o Major features (user interface):
17616 - Tor now supports the ability to declare options deprecated, so
17617 that we can recommend that people stop using them. Previously,
17618 this was done in an ad-hoc way. Closes ticket 19820.
17620 o Major bugfixes (directory downloads):
17621 - Avoid resetting download status for consensuses hourly, since we
17622 already have another, smarter retry mechanism. Fixes bug 8625;
17623 bugfix on 0.2.0.9-alpha.
17625 o Minor features (config):
17626 - Warn users when descriptor and port addresses are inconsistent.
17627 Mitigates bug 13953; patch by teor.
17629 o Minor features (geoip):
17630 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
17633 o Minor features (user interface):
17634 - There is a new --list-deprecated-options command-line option to
17635 list all of the deprecated options. Implemented as part of
17638 o Minor bugfixes (code style):
17639 - Fix an integer signedness conversion issue in the case conversion
17640 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
17642 o Minor bugfixes (compilation):
17643 - Build correctly on versions of libevent2 without support for
17644 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
17646 - Fix a compilation warning on GCC versions before 4.6. Our
17647 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
17648 when it is also required as an argument to the compiler pragma.
17649 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
17651 o Minor bugfixes (compilation, also in 0.2.8.7):
17652 - Remove an inappropriate "inline" in tortls.c that was causing
17653 warnings on older versions of GCC. Fixes bug 19903; bugfix
17656 o Minor bugfixes (fallback directories, also in 0.2.8.7):
17657 - Avoid logging a NULL string pointer when loading fallback
17658 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
17659 and 0.2.8.1-alpha. Report and patch by "rubiate".
17661 o Minor bugfixes (logging):
17662 - Log a more accurate message when we fail to dump a microdescriptor.
17663 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
17665 o Minor bugfixes (memory leak):
17666 - Fix a series of slow memory leaks related to parsing torrc files
17667 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
17669 o Deprecated features:
17670 - A number of DNS-cache-related sub-options for client ports are now
17671 deprecated for security reasons, and may be removed in a future
17672 version of Tor. (We believe that client-side DNS caching is a bad
17673 idea for anonymity, and you should not turn it on.) The options
17674 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
17675 UseIPv4Cache, and UseIPv6Cache.
17676 - A number of options are deprecated for security reasons, and may
17677 be removed in a future version of Tor. The options are:
17678 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
17679 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
17680 CloseHSClientCircuitsImmediatelyOnTimeout,
17681 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
17682 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
17683 UseNTorHandshake, and WarnUnsafeSocks.
17684 - The *ListenAddress options are now deprecated as unnecessary: the
17685 corresponding *Port options should be used instead. These options
17686 may someday be removed. The affected options are:
17687 ControlListenAddress, DNSListenAddress, DirListenAddress,
17688 NATDListenAddress, ORListenAddress, SocksListenAddress,
17689 and TransListenAddress.
17692 - Correct the IPv6 syntax in our documentation for the
17693 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
17696 - We no longer include the (dead, deprecated) bufferevent code in
17697 Tor. Closes ticket 19450. Based on a patch from U+039b.
17700 Changes in version 0.2.8.7 - 2016-08-24
17701 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
17702 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
17703 who sets the ReachableAddresses option, and all bridges, are strongly
17704 encouraged to upgrade.
17706 o Directory authority changes:
17707 - The "Tonga" bridge authority has been retired; the new bridge
17708 authority is "Bifroest". Closes tickets 19728 and 19690.
17710 o Major bugfixes (client, security):
17711 - Only use the ReachableAddresses option to restrict the first hop
17712 in a path. In earlier versions of 0.2.8.x, it would apply to
17713 every hop in the path, with a possible degradation in anonymity
17714 for anyone using an uncommon ReachableAddress setting. Fixes bug
17715 19973; bugfix on 0.2.8.2-alpha.
17717 o Minor features (geoip):
17718 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
17721 o Minor bugfixes (compilation):
17722 - Remove an inappropriate "inline" in tortls.c that was causing
17723 warnings on older versions of GCC. Fixes bug 19903; bugfix
17726 o Minor bugfixes (fallback directories):
17727 - Avoid logging a NULL string pointer when loading fallback
17728 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
17729 and 0.2.8.1-alpha. Report and patch by "rubiate".
17732 Changes in version 0.2.9.1-alpha - 2016-08-08
17733 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
17734 series. It improves our support for hardened builds and compiler
17735 warnings, deploys some critical infrastructure for improvements to
17736 hidden services, includes a new timing backend that we hope to use for
17737 better support for traffic padding, makes it easier for programmers to
17738 log unexpected events, and contains other small improvements to
17739 security, correctness, and performance.
17741 Below are the changes since 0.2.8.6.
17743 o New system requirements:
17744 - Tor now requires Libevent version 2.0.10-stable or later. Older
17745 versions of Libevent have less efficient backends for several
17746 platforms, and lack the DNS code that we use for our server-side
17747 DNS support. This implements ticket 19554.
17748 - Tor now requires zlib version 1.2 or later, for security,
17749 efficiency, and (eventually) gzip support. (Back when we started,
17750 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
17751 released in 2003. We recommend the latest version.)
17753 o Major features (build, hardening):
17754 - Tor now builds with -ftrapv by default on compilers that support
17755 it. This option detects signed integer overflow (which C forbids),
17756 and turns it into a hard-failure. We do not apply this option to
17757 code that needs to run in constant time to avoid side-channels;
17758 instead, we use -fwrapv in that code. Closes ticket 17983.
17759 - When --enable-expensive-hardening is selected, stop applying the
17760 clang/gcc sanitizers to code that needs to run in constant time.
17761 Although we are aware of no introduced side-channels, we are not
17762 able to prove that there are none. Related to ticket 17983.
17764 o Major features (compilation):
17765 - Our big list of extra GCC warnings is now enabled by default when
17766 building with GCC (or with anything like Clang that claims to be
17767 GCC-compatible). To make all warnings into fatal compilation
17768 errors, pass --enable-fatal-warnings to configure. Closes
17770 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
17771 turn on C and POSIX extensions. (Previously, we attempted to do
17772 this on an ad hoc basis.) Closes ticket 19139.
17774 o Major features (directory authorities, hidden services):
17775 - Directory authorities can now perform the shared randomness
17776 protocol specified by proposal 250. Using this protocol, directory
17777 authorities generate a global fresh random value every day. In the
17778 future, this value will be used by hidden services to select
17779 HSDirs. This release implements the directory authority feature;
17780 the hidden service side will be implemented in the future as part
17781 of proposal 224. Resolves ticket 16943; implements proposal 250.
17783 o Major features (downloading, random exponential backoff):
17784 - When we fail to download an object from a directory service, wait
17785 for an (exponentially increasing) randomized amount of time before
17786 retrying, rather than a fixed interval as we did before. This
17787 prevents a group of Tor instances from becoming too synchronized,
17788 or a single Tor instance from becoming too predictable, in its
17789 download schedule. Closes ticket 15942.
17791 o Major bugfixes (exit policies):
17792 - Avoid disclosing exit outbound bind addresses, configured port
17793 bind addresses, and local interface addresses in relay descriptors
17794 by default under ExitPolicyRejectPrivate. Instead, only reject
17795 these (otherwise unlisted) addresses if
17796 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
17797 0.2.7.2-alpha. Patch by teor.
17799 o Major bugfixes (hidden service client):
17800 - Allow Tor clients with appropriate controllers to work with
17801 FetchHidServDescriptors set to 0. Previously, this option also
17802 disabled descriptor cache lookup, thus breaking hidden services
17803 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
17805 o Minor features (build, hardening):
17806 - Detect and work around a libclang_rt problem that would prevent
17807 clang from finding __mulodi4() on some 32-bit platforms, and thus
17808 keep -ftrapv from linking on those systems. Closes ticket 19079.
17809 - When building on a system without runtime support for the runtime
17810 hardening options, try to log a useful warning at configuration
17811 time, rather than an incomprehensible warning at link time. If
17812 expensive hardening was requested, this warning becomes an error.
17813 Closes ticket 18895.
17815 o Minor features (code safety):
17816 - In our integer-parsing functions, ensure that maxiumum value we
17817 give is no smaller than the minimum value. Closes ticket 19063;
17820 o Minor features (controller):
17821 - Implement new GETINFO queries for all downloads that use
17822 download_status_t to schedule retries. This allows controllers to
17823 examine the schedule for pending downloads. Closes ticket 19323.
17824 - Allow controllers to configure basic client authorization on
17825 hidden services when they create them with the ADD_ONION control
17826 command. Implements ticket 15588. Patch by "special".
17827 - Fire a STATUS_SERVER controller event whenever the hibernation
17828 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
17830 o Minor features (directory authority):
17831 - Directory authorities now only give the Guard flag to a relay if
17832 they are also giving it the Stable flag. This change allows us to
17833 simplify path selection for clients. It should have minimal effect
17834 in practice, since >99% of Guards already have the Stable flag.
17835 Implements ticket 18624.
17836 - Directory authorities now write their v3-status-votes file out to
17837 disk earlier in the consensus process, so we have a record of the
17838 votes even if we abort the consensus process. Resolves
17841 o Minor features (hidden service):
17842 - Stop being so strict about the payload length of "rendezvous1"
17843 cells. We used to be locked in to the "TAP" handshake length, and
17844 now we can handle better handshakes like "ntor". Resolves
17847 o Minor features (infrastructure, time):
17848 - Tor now uses the operating system's monotonic timers (where
17849 available) for internal fine-grained timing. Previously we would
17850 look at the system clock, and then attempt to compensate for the
17851 clock running backwards. Closes ticket 18908.
17852 - Tor now includes an improved timer backend, so that we can
17853 efficiently support tens or hundreds of thousands of concurrent
17854 timers, as will be needed for some of our planned anti-traffic-
17855 analysis work. This code is based on William Ahern's "timeout.c"
17856 project, which implements a "tickless hierarchical timing wheel".
17857 Closes ticket 18365.
17859 o Minor features (logging):
17860 - Provide a more useful warning message when configured with an
17861 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
17862 - When dumping unparseable router descriptors, optionally store them
17863 in separate files, named by digest, up to a configurable size
17864 limit. You can change the size limit by setting the
17865 MaxUnparseableDescSizeToLog option, and disable this feature by
17866 setting that option to 0. Closes ticket 18322.
17867 - Add a set of macros to check nonfatal assertions, for internal
17868 use. Migrating more of our checks to these should help us avoid
17869 needless crash bugs. Closes ticket 18613.
17871 o Minor features (performance):
17872 - Change the "optimistic data" extension from "off by default" to
17873 "on by default". The default was ordinarily overridden by a
17874 consensus option, but when clients were bootstrapping for the
17875 first time, they would not have a consensus to get the option
17876 from. Changing this default saves a round-trip during startup.
17877 Closes ticket 18815.
17879 o Minor features (relay, usability):
17880 - When the directory authorities refuse a bad relay's descriptor,
17881 encourage the relay operator to contact us. Many relay operators
17882 won't notice this line in their logs, but it's a win if even a few
17883 learn why we don't like what their relay was doing. Resolves
17886 o Minor features (testing):
17887 - Let backtrace tests work correctly under AddressSanitizer. Fixes
17888 part of bug 18934; bugfix on 0.2.5.2-alpha.
17889 - Move the test-network.sh script to chutney, and modify tor's test-
17890 network.sh to call the (newer) chutney version when available.
17891 Resolves ticket 19116. Patch by teor.
17892 - Use the lcov convention for marking lines as unreachable, so that
17893 we don't count them when we're generating test coverage data.
17894 Update our coverage tools to understand this convention. Closes
17897 o Minor bugfixes (bootstrap):
17898 - Remember the directory we fetched the consensus or previous
17899 certificates from, and use it to fetch future authority
17900 certificates. This change improves bootstrapping performance.
17901 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
17903 o Minor bugfixes (build):
17904 - The test-stem and test-network makefile targets now depend only on
17905 the tor binary that they are testing. Previously, they depended on
17906 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
17907 patch from "cypherpunks".
17909 o Minor bugfixes (circuits):
17910 - Make sure extend_info_from_router() is only called on servers.
17911 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
17913 o Minor bugfixes (compilation):
17914 - When building with Clang, use a full set of GCC warnings.
17915 (Previously, we included only a subset, because of the way we
17916 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
17918 o Minor bugfixes (directory authority):
17919 - Authorities now sort the "package" lines in their votes, for ease
17920 of debugging. (They are already sorted in consensus documents.)
17921 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
17922 - When parsing a detached signature, make sure we use the length of
17923 the digest algorithm instead of an hardcoded DIGEST256_LEN in
17924 order to avoid comparing bytes out-of-bounds with a smaller digest
17925 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
17927 o Minor bugfixes (documentation):
17928 - Document the --passphrase-fd option in the tor manpage. Fixes bug
17929 19504; bugfix on 0.2.7.3-rc.
17930 - Fix the description of the --passphrase-fd option in the
17931 tor-gencert manpage. The option is used to pass the number of a
17932 file descriptor to read the passphrase from, not to read the file
17933 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
17935 o Minor bugfixes (ephemeral hidden service):
17936 - When deleting an ephemeral hidden service, close its intro points
17937 even if they are not completely open. Fixes bug 18604; bugfix
17940 o Minor bugfixes (guard selection):
17941 - Use a single entry guard even if the NumEntryGuards consensus
17942 parameter is not provided. Fixes bug 17688; bugfix
17944 - Don't mark guards as unreachable if connection_connect() fails.
17945 That function fails for local reasons, so it shouldn't reveal
17946 anything about the status of the guard. Fixes bug 14334; bugfix
17949 o Minor bugfixes (hidden service client):
17950 - Increase the minimum number of internal circuits we preemptively
17951 build from 2 to 3, so a circuit is available when a client
17952 connects to another onion service. Fixes bug 13239; bugfix
17955 o Minor bugfixes (logging):
17956 - When logging a directory ownership mismatch, log the owning
17957 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
17959 o Minor bugfixes (memory leaks):
17960 - Fix a small, uncommon memory leak that could occur when reading a
17961 truncated ed25519 key file. Fixes bug 18956; bugfix
17964 o Minor bugfixes (testing):
17965 - Allow clients to retry HSDirs much faster in test networks. Fixes
17966 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
17967 - Disable ASAN's detection of segmentation faults while running
17968 test_bt.sh, so that we can make sure that our own backtrace
17969 generation code works. Fixes another aspect of bug 18934; bugfix
17970 on 0.2.5.2-alpha. Patch from "cypherpunks".
17971 - Fix the test-network-all target on out-of-tree builds by using the
17972 correct path to the test driver script. Fixes bug 19421; bugfix
17975 o Minor bugfixes (time):
17976 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
17977 bugfix on all released tor versions.
17978 - When computing the difference between two times in milliseconds,
17979 we now round to the nearest millisecond correctly. Previously, we
17980 could sometimes round in the wrong direction. Fixes bug 19428;
17981 bugfix on 0.2.2.2-alpha.
17983 o Minor bugfixes (user interface):
17984 - Display a more accurate number of suppressed messages in the log
17985 rate-limiter. Previously, there was a potential integer overflow
17986 in the counter. Now, if the number of messages hits a maximum, the
17987 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
17989 - Fix a typo in the passphrase prompt for the ed25519 identity key.
17990 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
17992 o Code simplification and refactoring:
17993 - Remove redundant declarations of the MIN macro. Closes
17995 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
17996 Closes ticket 18462; patch from "icanhasaccount".
17997 - Split the 600-line directory_handle_command_get function into
17998 separate functions for different URL types. Closes ticket 16698.
18001 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
18002 ticket 19153. Patch from "U+039b".
18004 o Removed features:
18005 - Remove support for "GET /tor/bytes.txt" DirPort request, and
18006 "GETINFO dir-usage" controller request, which were only available
18007 via a compile-time option in Tor anyway. Feature was added in
18008 0.2.2.1-alpha. Resolves ticket 19035.
18009 - There is no longer a compile-time option to disable support for
18010 TransPort. (If you don't want TransPort; just don't use it.) Patch
18011 from "U+039b". Closes ticket 19449.
18014 - Run more workqueue tests as part of "make check". These had
18015 previously been implemented, but you needed to know special
18016 command-line options to enable them.
18017 - We now have unit tests for our code to reject zlib "compression
18018 bombs". (Fortunately, the code works fine.)
18021 Changes in version 0.2.8.6 - 2016-08-02
18023 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
18025 The Tor 0.2.8 series improves client bootstrapping performance,
18026 completes the authority-side implementation of improved identity
18027 keys for relays, and includes numerous bugfixes and performance
18028 improvements throughout the program. This release continues to
18029 improve the coverage of Tor's test suite. For a full list of
18030 changes since Tor 0.2.7, see the ReleaseNotes file.
18032 Changes since 0.2.8.5-rc:
18034 o Minor features (geoip):
18035 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
18038 o Minor bugfixes (compilation):
18039 - Fix a compilation warning in the unit tests on systems where char
18040 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
18042 o Minor bugfixes (fallback directories):
18043 - Remove 1 fallback that was on the hardcoded list, then opted-out,
18044 leaving 89 of the 100 fallbacks originally introduced in Tor
18045 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
18047 o Minor bugfixes (Linux seccomp2 sandbox):
18048 - Allow more syscalls when running with "Sandbox 1" enabled:
18049 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
18050 some systems, these are required for Tor to start. Fixes bug
18051 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
18052 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
18053 so that get_interface_address6_via_udp_socket_hack() can work.
18054 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
18057 Changes in version 0.2.8.5-rc - 2016-07-07
18058 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
18059 series. If we find no new bugs or regressions here, the first stable
18060 0.2.8 release will be identical to it. It has a few small bugfixes
18061 against previous versions.
18063 o Directory authority changes:
18064 - Urras is no longer a directory authority. Closes ticket 19271.
18066 o Major bugfixes (heartbeat):
18067 - Fix a regression that would crash Tor when the periodic
18068 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
18069 0.2.8.1-alpha. Reported by "kubaku".
18071 o Minor features (build):
18072 - Tor now again builds with the recent OpenSSL 1.1 development
18073 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
18074 - When building manual pages, set the timezone to "UTC", so that the
18075 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
18076 Patch from intrigeri.
18078 o Minor bugfixes (fallback directory selection):
18079 - Avoid errors during fallback selection if there are no eligible
18080 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
18083 o Minor bugfixes (IPv6, microdescriptors):
18084 - Don't check node addresses when we only have a routerstatus. This
18085 allows IPv6-only clients to bootstrap by fetching microdescriptors
18086 from fallback directory mirrors. (The microdescriptor consensus
18087 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
18090 o Minor bugfixes (logging):
18091 - Reduce pointlessly verbose log messages when directory servers
18092 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
18093 0.2.8.1-alpha. Patch by teor.
18094 - When a fallback directory changes its fingerprint from the hard-
18095 coded fingerprint, log a less severe, more explanatory log
18096 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
18098 o Minor bugfixes (Linux seccomp2 sandboxing):
18099 - Allow statistics to be written to disk when "Sandbox 1" is
18100 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
18101 0.2.6.1-alpha respectively.
18103 o Minor bugfixes (user interface):
18104 - Remove a warning message "Service [scrubbed] not found after
18105 descriptor upload". This message appears when one uses HSPOST
18106 control command to upload a service descriptor. Since there is
18107 only a descriptor and no service, showing this message is
18108 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
18110 o Fallback directory list:
18111 - Add a comment to the generated fallback directory list that
18112 explains how to comment out unsuitable fallbacks in a way that's
18113 compatible with the stem fallback parser.
18114 - Update fallback whitelist and blacklist based on relay operator
18115 emails. Blacklist unsuitable (non-working, over-volatile)
18116 fallbacks. Resolves ticket 19071. Patch by teor.
18117 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
18118 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
18119 ticket 19071; patch by teor.
18122 Changes in version 0.2.8.4-rc - 2016-06-15
18123 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
18124 If we find no new bugs or regressions here, the first stable 0.2.8
18125 release will be identical to it. It has a few small bugfixes against
18128 o Major bugfixes (user interface):
18129 - Correctly give a warning in the cases where a relay is specified
18130 by nickname, and one such relay is found, but it is not officially
18131 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
18133 o Minor features (build):
18134 - Tor now builds once again with the recent OpenSSL 1.1 development
18135 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
18137 o Minor features (geoip):
18138 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
18141 o Minor bugfixes (compilation):
18142 - Cause the unit tests to compile correctly on mingw64 versions that
18143 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
18145 o Minor bugfixes (downloading):
18146 - Predict more correctly whether we'll be downloading over HTTP when
18147 we determine the maximum length of a URL. This should avoid a
18148 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
18152 Changes in version 0.2.8.3-alpha - 2016-05-26
18153 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
18154 the course of the 0.2.8 development cycle. It improves the behavior of
18155 directory clients, fixes several crash bugs, fixes a gap in compiler
18156 hardening, and allows the full integration test suite to run on
18159 o Major bugfixes (security, client, DNS proxy):
18160 - Stop a crash that could occur when a client running with DNSPort
18161 received a query with multiple address types, and the first
18162 address type was not supported. Found and fixed by Scott Dial.
18163 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
18165 o Major bugfixes (security, compilation):
18166 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
18167 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
18168 cause a compiler warning, thereby making other checks fail, and
18169 needlessly disabling compiler-hardening support. Fixes one case of
18170 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
18172 o Major bugfixes (security, directory authorities):
18173 - Fix a crash and out-of-bounds write during authority voting, when
18174 the list of relays includes duplicate ed25519 identity keys. Fixes
18175 bug 19032; bugfix on 0.2.8.2-alpha.
18177 o Major bugfixes (client, bootstrapping):
18178 - Check if bootstrap consensus downloads are still needed when the
18179 linked connection attaches. This prevents tor making unnecessary
18180 begindir-style connections, which are the only directory
18181 connections tor clients make since the fix for 18483 was merged.
18182 - Fix some edge cases where consensus download connections may not
18183 have been closed, even though they were not needed. Related to fix
18185 - Make relays retry consensus downloads the correct number of times,
18186 rather than the more aggressive client retry count. Fixes part of
18188 - Stop downloading consensuses when we have a consensus, even if we
18189 don't have all the certificates for it yet. Fixes bug 18809;
18190 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
18192 o Major bugfixes (directory mirrors):
18193 - Decide whether to advertise begindir support in the the same way
18194 we decide whether to advertise our DirPort. Allowing these
18195 decisions to become out-of-sync led to surprising behavior like
18196 advertising begindir support when hibernation made us not
18197 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
18200 o Major bugfixes (IPv6 bridges, client):
18201 - Actually use IPv6 addresses when selecting directory addresses for
18202 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
18205 o Major bugfixes (key management):
18206 - If OpenSSL fails to generate an RSA key, do not retain a dangling
18207 pointer to the previous (uninitialized) key value. The impact here
18208 should be limited to a difficult-to-trigger crash, if OpenSSL is
18209 running an engine that makes key generation failures possible, or
18210 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
18211 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
18214 o Major bugfixes (testing):
18215 - Fix a bug that would block 'make test-network-all' on systems where
18216 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
18217 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
18218 bugfix on 0.2.8.1-alpha.
18220 o Minor features (clients):
18221 - Make clients, onion services, and bridge relays always use an
18222 encrypted begindir connection for directory requests. Resolves
18223 ticket 18483. Patch by "teor".
18225 o Minor features (fallback directory mirrors):
18226 - Give each fallback the same weight for client selection; restrict
18227 fallbacks to one per operator; report fallback directory detail
18228 changes when rebuilding list; add new fallback directory mirrors
18229 to the whitelist; and many other minor simplifications and fixes.
18230 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
18231 0.2.8.1-alpha; patch by "teor".
18232 - Replace the 21 fallbacks generated in January 2016 and included in
18233 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
18234 2016. Closes task 17158; patch by "teor".
18236 o Minor features (geoip):
18237 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
18240 o Minor bugfixes (assert, portability):
18241 - Fix an assertion failure in memarea.c on systems where "long" is
18242 shorter than the size of a pointer. Fixes bug 18716; bugfix
18245 o Minor bugfixes (bootstrap):
18246 - Consistently use the consensus download schedule for authority
18247 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
18249 o Minor bugfixes (build):
18250 - Remove a pair of redundant AM_CONDITIONAL declarations from
18251 configure.ac. Fixes one final case of bug 17744; bugfix
18253 - Resolve warnings when building on systems that are concerned with
18254 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
18256 - When libscrypt.h is found, but no libscrypt library can be linked,
18257 treat libscrypt as absent. Fixes bug 19161; bugfix
18260 o Minor bugfixes (client):
18261 - Turn all TestingClientBootstrap* into non-testing torrc options.
18262 This changes simply renames them by removing "Testing" in front of
18263 them and they do not require TestingTorNetwork to be enabled
18264 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
18265 - Make directory node selection more reliable, mainly for IPv6-only
18266 clients and clients with few reachable addresses. Fixes bug 18929;
18267 bugfix on 0.2.8.1-alpha. Patch by "teor".
18269 o Minor bugfixes (controller, microdescriptors):
18270 - Make GETINFO dir/status-vote/current/consensus conform to the
18271 control specification by returning "551 Could not open cached
18272 consensus..." when not caching consensuses. Fixes bug 18920;
18273 bugfix on 0.2.2.6-alpha.
18275 o Minor bugfixes (crypto, portability):
18276 - The SHA3 and SHAKE routines now produce the correct output on Big
18277 Endian systems. No code calls either algorithm yet, so this is
18278 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
18279 - Tor now builds again with the recent OpenSSL 1.1 development
18280 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
18283 o Minor bugfixes (directories):
18284 - When fetching extrainfo documents, compare their SHA256 digests
18285 and Ed25519 signing key certificates with the routerinfo that led
18286 us to fetch them, rather than with the most recent routerinfo.
18287 Otherwise we generate many spurious warnings about mismatches.
18288 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
18290 o Minor bugfixes (logging):
18291 - When we can't generate a signing key because OfflineMasterKey is
18292 set, do not imply that we should have been able to load it. Fixes
18293 bug 18133; bugfix on 0.2.7.2-alpha.
18294 - Stop periodic_event_dispatch() from blasting twelve lines per
18295 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
18296 - When rejecting a misformed INTRODUCE2 cell, only log at
18297 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
18299 o Minor bugfixes (pluggable transports):
18300 - Avoid reporting a spurious error when we decide that we don't need
18301 to terminate a pluggable transport because it has already exited.
18302 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
18304 o Minor bugfixes (pointer arithmetic):
18305 - Fix a bug in memarea_alloc() that could have resulted in remote
18306 heap write access, if Tor had ever passed an unchecked size to
18307 memarea_alloc(). Fortunately, all the sizes we pass to
18308 memarea_alloc() are pre-checked to be less than 128 kilobytes.
18309 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
18312 o Minor bugfixes (relays):
18313 - Consider more config options when relays decide whether to
18314 regenerate their descriptor. Fixes more of bug 12538; bugfix
18316 - Resolve some edge cases where we might launch an ORPort
18317 reachability check even when DisableNetwork is set. Noticed while
18318 fixing bug 18616; bugfix on 0.2.3.9-alpha.
18320 o Minor bugfixes (statistics):
18321 - We now include consensus downloads via IPv6 in our directory-
18322 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
18324 o Minor bugfixes (testing):
18325 - Allow directories in small networks to bootstrap by skipping
18326 DirPort checks when the consensus has no exits. Fixes bug 19003;
18327 bugfix on 0.2.8.1-alpha. Patch by teor.
18328 - Fix a small memory leak that would occur when the
18329 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
18330 bugfix on 0.2.5.2-alpha.
18332 o Minor bugfixes (time handling):
18333 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
18334 field. Otherwise, our unit tests crash on Windows. Fixes bug
18335 18977; bugfix on 0.2.2.25-alpha.
18338 - Document the contents of the 'datadir/keys' subdirectory in the
18339 manual page. Closes ticket 17621.
18340 - Stop recommending use of nicknames to identify relays in our
18341 MapAddress documentation. Closes ticket 18312.
18344 Changes in version 0.2.8.2-alpha - 2016-03-28
18345 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
18346 bugs in earlier versions of Tor, including some that prevented
18347 authorities using Tor 0.2.7.x from running correctly. IPv6 and
18348 directory support should also be much improved.
18350 o New system requirements:
18351 - Tor no longer supports versions of OpenSSL with a broken
18352 implementation of counter mode. (This bug was present in OpenSSL
18353 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
18354 longer runs with, these versions.
18355 - Tor no longer attempts to support platforms where the "time_t"
18356 type is unsigned. (To the best of our knowledge, only OpenVMS does
18357 this, and Tor has never actually built on OpenVMS.) Closes
18359 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
18360 later (released in 2008 and 2009 respectively). If you are
18361 building Tor from the git repository instead of from the source
18362 distribution, and your tools are older than this, you will need to
18363 upgrade. Closes ticket 17732.
18365 o Major bugfixes (security, pointers):
18366 - Avoid a difficult-to-trigger heap corruption attack when extending
18367 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
18368 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
18369 Reported by Guido Vranken.
18371 o Major bugfixes (bridges, pluggable transports):
18372 - Modify the check for OR connections to private addresses. Allow
18373 bridges on private addresses, including pluggable transports that
18374 ignore the (potentially private) address in the bridge line. Fixes
18375 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
18377 o Major bugfixes (compilation):
18378 - Repair hardened builds under the clang compiler. Previously, our
18379 use of _FORTIFY_SOURCE would conflict with clang's address
18380 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
18382 o Major bugfixes (crash on shutdown):
18383 - Correctly handle detaching circuits from muxes when shutting down.
18384 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
18385 - Fix an assert-on-exit bug related to counting memory usage in
18386 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
18388 o Major bugfixes (crash on startup):
18389 - Fix a segfault during startup: If a Unix domain socket was
18390 configured as listener (such as a ControlSocket or a SocksPort
18391 "unix:" socket), and tor was started as root but not configured to
18392 switch to another user, tor would segfault while trying to string
18393 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
18396 o Major bugfixes (dns proxy mode, crash):
18397 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
18398 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
18400 o Major bugfixes (relays, bridge clients):
18401 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
18402 bridge clients use the address configured in the bridge line.
18403 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
18406 o Major bugfixes (voting):
18407 - Actually enable support for authorities to match routers by their
18408 Ed25519 identities. Previously, the code had been written, but
18409 some debugging code that had accidentally been left in the
18410 codebase made it stay turned off. Fixes bug 17702; bugfix
18412 - When collating votes by Ed25519 identities, authorities now
18413 include a "NoEdConsensus" flag if the ed25519 value (or lack
18414 thereof) for a server does not reflect the majority consensus.
18415 Related to bug 17668; bugfix on 0.2.7.2-alpha.
18416 - When generating a vote with keypinning disabled, never include two
18417 entries for the same ed25519 identity. This bug was causing
18418 authorities to generate votes that they could not parse when a
18419 router violated key pinning by changing its RSA identity but
18420 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
18421 18318. Bugfix on 0.2.7.2-alpha.
18423 o Minor features (security, win32):
18424 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
18425 attack. Fixes bug 18123; bugfix on all tor versions. Patch
18428 o Minor features (bug-resistance):
18429 - Make Tor survive errors involving connections without a
18430 corresponding event object. Previously we'd fail with an
18431 assertion; now we produce a log message. Related to bug 16248.
18433 o Minor features (build):
18434 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
18435 as having possible IPFW support. Closes ticket 18448. Patch from
18436 Steven Chamberlain.
18438 o Minor features (code hardening):
18439 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
18440 level code, to harden against accidental failures to NUL-
18441 terminate. Part of ticket 17852. Patch from jsturgix. Found
18444 o Minor features (crypto):
18445 - Validate the hard-coded Diffie-Hellman parameters and ensure that
18446 p is a safe prime, and g is a suitable generator. Closes
18449 o Minor features (geoip):
18450 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
18453 o Minor features (hidden service directory):
18454 - Streamline relay-side hsdir handling: when relays consider whether
18455 to accept an uploaded hidden service descriptor, they no longer
18456 check whether they are one of the relays in the network that is
18457 "supposed" to handle that descriptor. Implements ticket 18332.
18459 o Minor features (IPv6):
18460 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
18461 to 1, tor prefers IPv6 directory addresses.
18462 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
18463 avoids using IPv4 for client OR and directory connections.
18464 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
18465 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
18466 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
18468 o Minor features (linux seccomp2 sandbox):
18469 - Reject attempts to change our Address with "Sandbox 1" enabled.
18470 Changing Address with Sandbox turned on would never actually work,
18471 but previously it would fail in strange and confusing ways. Found
18472 while fixing 18548.
18474 o Minor features (robustness):
18475 - Exit immediately with an error message if the code attempts to use
18476 Libevent without having initialized it. This should resolve some
18477 frequently-made mistakes in our unit tests. Closes ticket 18241.
18479 o Minor features (unix domain sockets):
18480 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
18481 Unix domain sockets without checking the permissions on the parent
18482 directory. (Tor checks permissions by default because some
18483 operating systems only check permissions on the parent directory.
18484 However, some operating systems do look at permissions on the
18485 socket, and tor's default check is unneeded.) Closes ticket 18458.
18488 o Minor bugfixes (exit policies, security):
18489 - Refresh an exit relay's exit policy when interface addresses
18490 change. Previously, tor only refreshed the exit policy when the
18491 configured external address changed. Fixes bug 18208; bugfix on
18492 0.2.7.3-rc. Patch by teor.
18494 o Minor bugfixes (security, hidden services):
18495 - Prevent hidden services connecting to client-supplied rendezvous
18496 addresses that are reserved as internal or multicast. Fixes bug
18497 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
18499 o Minor bugfixes (build):
18500 - Do not link the unit tests against both the testing and non-
18501 testing versions of the static libraries. Fixes bug 18490; bugfix
18503 - Avoid spurious failures from configure files related to calling
18504 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
18505 0.2.0.1-alpha. Patch from "cypherpunks".
18506 - Silence spurious clang-scan warnings in the ed25519_donna code by
18507 explicitly initializing some objects. Fixes bug 18384; bugfix on
18508 0.2.7.2-alpha. Patch by teor.
18510 o Minor bugfixes (client, bootstrap):
18511 - Count receipt of new microdescriptors as progress towards
18512 bootstrapping. Previously, with EntryNodes set, Tor might not
18513 successfully repopulate the guard set on bootstrapping. Fixes bug
18514 16825; bugfix on 0.2.3.1-alpha.
18516 o Minor bugfixes (code correctness):
18517 - Update to the latest version of Trunnel, which tries harder to
18518 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
18519 by clang address sanitizer. Fixes bug 18373; bugfix
18522 o Minor bugfixes (configuration):
18523 - Fix a tiny memory leak when parsing a port configuration ending in
18524 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
18526 o Minor bugfixes (containers):
18527 - If we somehow attempt to construct a heap with more than
18528 1073741822 elements, avoid an integer overflow when maintaining
18529 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
18531 o Minor bugfixes (correctness):
18532 - Fix a bad memory handling bug that would occur if we had queued a
18533 cell on a channel's incoming queue. Fortunately, we can't actually
18534 queue a cell like that as our code is constructed today, but it's
18535 best to avoid this kind of error, even if there isn't any code
18536 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
18538 o Minor bugfixes (directory):
18539 - When generating a URL for a directory server on an IPv6 address,
18540 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
18541 on 0.2.3.9-alpha. Patch from Malek.
18543 o Minor bugfixes (fallback directory mirrors):
18544 - When requesting extrainfo descriptors from a trusted directory
18545 server, check whether it is an authority or a fallback directory
18546 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
18547 0.2.4.7-alpha. Reported by atagar, patch by teor.
18549 o Minor bugfixes (hidden service, client):
18550 - Handle the case where the user makes several fast consecutive
18551 requests to the same .onion address. Previously, the first six
18552 requests would each trigger a descriptor fetch, each picking a
18553 directory (there are 6 overall) and the seventh one would fail
18554 because no directories were left, thereby triggering a close on
18555 all current directory connections asking for the hidden service.
18556 The solution here is to not close the connections if we have
18557 pending directory fetches. Fixes bug 15937; bugfix
18560 o Minor bugfixes (hidden service, control port):
18561 - Add the onion address to the HS_DESC event for the UPLOADED action
18562 both on success or failure. It was previously hardcoded with
18563 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
18565 o Minor bugfixes (hidden service, directory):
18566 - Bridges now refuse "rendezvous2" (hidden service descriptor)
18567 publish attempts. Suggested by ticket 18332.
18569 o Minor bugfixes (linux seccomp2 sandbox):
18570 - Allow the setrlimit syscall, and the prlimit and prlimit64
18571 syscalls, which some libc implementations use under the hood.
18572 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
18573 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
18574 enabled and no DNS resolvers configured. This should help TAILS
18575 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
18576 - Fix the sandbox's interoperability with unix domain sockets under
18577 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
18579 o Minor bugfixes (logging):
18580 - When logging information about an unparsable networkstatus vote or
18581 consensus, do not say "vote" when we mean consensus. Fixes bug
18582 18368; bugfix on 0.2.0.8-alpha.
18583 - Scrub service name in "unrecognized service ID" log messages.
18584 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
18585 - Downgrade logs and backtraces about IP versions to info-level.
18586 Only log backtraces once each time tor runs. Assists in diagnosing
18587 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
18588 Christian, patch by teor.
18590 o Minor bugfixes (memory safety):
18591 - Avoid freeing an uninitialized pointer when opening a socket fails
18592 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
18593 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
18595 - Correctly duplicate addresses in get_interface_address6_list().
18596 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
18597 patch by "cypherpunks".
18598 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
18600 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
18601 18672; bugfix on 0.2.5.1-alpha.
18603 o Minor bugfixes (private directory):
18604 - Prevent a race condition when creating private directories. Fixes
18605 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
18606 Patch from jsturgix. Found with Flawfinder.
18608 o Minor bugfixes (test networks, IPv6):
18609 - Allow internal IPv6 addresses in descriptors in test networks.
18610 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
18613 o Minor bugfixes (testing):
18614 - We no longer disable assertions in the unit tests when coverage is
18615 enabled. Instead, we require you to say --disable-asserts-in-tests
18616 to the configure script if you need assertions disabled in the
18617 unit tests (for example, if you want to perform branch coverage).
18618 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
18620 o Minor bugfixes (time parsing):
18621 - Avoid overflow in tor_timegm when parsing dates in and after 2038
18622 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
18623 0.0.2pre14. Patch by teor.
18625 o Minor bugfixes (tor-gencert):
18626 - Correctly handle the case where an authority operator enters a
18627 passphrase but sends an EOF before sending a newline. Fixes bug
18628 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
18630 o Code simplification and refactoring:
18631 - Quote all the string interpolations in configure.ac -- even those
18632 which we are pretty sure can't contain spaces. Closes ticket
18633 17744. Patch from zerosion.
18634 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
18635 inplace, so there's no need to have a separate implementation for
18636 the non-inplace code. Closes ticket 18258. Patch from Malek.
18637 - Simplify return types for some crypto functions that can't
18638 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
18641 - Change build messages to refer to "Fedora" instead of "Fedora
18642 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
18643 Patches from "icanhasaccount" and "cypherpunks".
18645 o Removed features:
18646 - We no longer maintain an internal freelist in memarea.c.
18647 Allocators should be good enough to make this code unnecessary,
18648 and it's doubtful that it ever had any performance benefit.
18651 - Fix several warnings from clang's address sanitizer produced in
18653 - Treat backtrace test failures as expected on FreeBSD until we
18654 solve bug 17808. Closes ticket 18204.
18657 Changes in version 0.2.8.1-alpha - 2016-02-04
18658 Tor 0.2.8.1-alpha is the first alpha release in its series. It
18659 includes numerous small features and bugfixes against previous Tor
18660 versions, and numerous small infrastructure improvements. The most
18661 notable features are a set of improvements to the directory subsystem.
18663 o Major features (security, Linux):
18664 - When Tor starts as root on Linux and is told to switch user ID, it
18665 can now retain the capability to bind to low ports. By default,
18666 Tor will do this only when it's switching user ID and some low
18667 ports have been configured. You can change this behavior with the
18668 new option KeepBindCapabilities. Closes ticket 8195.
18670 o Major features (directory system):
18671 - When bootstrapping multiple consensus downloads at a time, use the
18672 first one that starts downloading, and close the rest. This
18673 reduces failures when authorities or fallback directories are slow
18674 or down. Together with the code for feature 15775, this feature
18675 should reduces failures due to fallback churn. Implements ticket
18676 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
18677 "mikeperry" and "teor".
18678 - Include a trial list of 21 default fallback directories, generated
18679 in January 2016, based on an opt-in survey of suitable relays.
18680 Doing this should make clients bootstrap more quickly and reliably,
18681 and reduce the load on the directory authorities. Closes ticket
18682 15775. Patch by "teor".
18683 Candidates identified using an OnionOO script by "weasel", "teor",
18684 "gsathya", and "karsten".
18685 - Previously only relays that explicitly opened a directory port
18686 (DirPort) accepted directory requests from clients. Now all
18687 relays, with and without a DirPort, accept and serve tunneled
18688 directory requests that they receive through their ORPort. You can
18689 disable this behavior using the new DirCache option. Closes
18692 o Major key updates:
18693 - Update the V3 identity key for the dannenberg directory authority:
18694 it was changed on 18 November 2015. Closes task 17906. Patch
18697 o Minor features (security, clock):
18698 - Warn when the system clock appears to move back in time (when the
18699 state file was last written in the future). Tor doesn't know that
18700 consensuses have expired if the clock is in the past. Patch by
18701 "teor". Implements ticket 17188.
18703 o Minor features (security, exit policies):
18704 - ExitPolicyRejectPrivate now rejects more private addresses by
18705 default. Specifically, it now rejects the relay's outbound bind
18706 addresses (if configured), and the relay's configured port
18707 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
18708 0.2.0.11-alpha. Patch by "teor".
18710 o Minor features (security, memory erasure):
18711 - Set the unused entries in a smartlist to NULL. This helped catch
18712 a (harmless) bug, and shouldn't affect performance too much.
18713 Implements ticket 17026.
18714 - Use SecureMemoryWipe() function to securely clean memory on
18715 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
18716 Implements feature 17986.
18717 - Use explicit_bzero or memset_s when present. Previously, we'd use
18718 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
18719 from <logan@hackers.mu> and <selven@hackers.mu>.
18720 - Make memwipe() do nothing when passed a NULL pointer or buffer of
18721 zero size. Check size argument to memwipe() for underflow. Fixes
18722 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
18725 o Minor features (security, RNG):
18726 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
18727 positively are not allowed to fail. Previously we depended on
18728 internal details of OpenSSL's behavior. Closes ticket 17686.
18729 - Never use the system entropy output directly for anything besides
18730 seeding the PRNG. When we want to generate important keys, instead
18731 of using system entropy directly, we now hash it with the PRNG
18732 stream. This may help resist certain attacks based on broken OS
18733 entropy implementations. Closes part of ticket 17694.
18734 - Use modern system calls (like getentropy() or getrandom()) to
18735 generate strong entropy on platforms that have them. Closes
18738 o Minor features (accounting):
18739 - Added two modes to the AccountingRule option: One for limiting
18740 only the number of bytes sent ("AccountingRule out"), and one for
18741 limiting only the number of bytes received ("AccountingRule in").
18742 Closes ticket 15989; patch from "unixninja92".
18744 o Minor features (build):
18745 - Since our build process now uses "make distcheck", we no longer
18746 force "make dist" to depend on "make check". Closes ticket 17893;
18747 patch from "cypherpunks."
18748 - Tor now builds successfully with the recent OpenSSL 1.1
18749 development branch, and with the latest LibreSSL. Closes tickets
18750 17549, 17921, and 17984.
18752 o Minor features (controller):
18753 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
18754 tickets 16774 and 17817. Patch by George Tankersley.
18755 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
18756 service descriptor from a service's local hidden service
18757 descriptor cache. Closes ticket 14846.
18758 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
18759 controllers can examine the the reject rules added by
18760 ExitPolicyRejectPrivate. This makes it easier for stem to display
18763 o Minor features (crypto):
18764 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
18766 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
18767 - When allocating a digest state object, allocate no more space than
18768 we actually need. Previously, we would allocate as much space as
18769 the state for the largest algorithm would need. This change saves
18770 up to 672 bytes per circuit. Closes ticket 17796.
18771 - Improve performance when hashing non-multiple of 8 sized buffers,
18772 based on Andrew Moon's public domain SipHash-2-4 implementation.
18773 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
18775 o Minor features (directory downloads):
18776 - Wait for busy authorities and fallback directories to become non-
18777 busy when bootstrapping. (A similar change was made in 6c443e987d
18778 for directory caches chosen from the consensus.) Closes ticket
18779 17864; patch by "teor".
18780 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
18781 directory mirrors. The default is 1; set it to 0 to disable
18782 fallbacks. Implements ticket 17576. Patch by "teor".
18784 o Minor features (geoip):
18785 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
18788 o Minor features (IPv6):
18789 - Add an argument 'ipv6=address:orport' to the DirAuthority and
18790 FallbackDir torrc options, to specify an IPv6 address for an
18791 authority or fallback directory. Add hard-coded ipv6 addresses for
18792 directory authorities that have them. Closes ticket 17327; patch
18793 from Nick Mathewson and "teor".
18794 - Add address policy assume_action support for IPv6 addresses.
18795 - Limit IPv6 mask bits to 128.
18796 - Warn when comparing against an AF_UNSPEC address in a policy, it's
18797 almost always a bug. Closes ticket 17863; patch by "teor".
18798 - Allow users to configure directory authorities and fallback
18799 directory servers with IPv6 addresses and ORPorts. Resolves
18801 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
18802 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
18803 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
18804 17638; bugfix on 0.0.2pre8. Patch by "teor".
18806 o Minor features (logging):
18807 - When logging to syslog, allow a tag to be added to the syslog
18808 identity (the string prepended to every log message). The tag can
18809 be configured with SyslogIdentityTag and defaults to none. Setting
18810 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
18813 o Minor features (portability):
18814 - Use timingsafe_memcmp() where available. Closes ticket 17944;
18815 patch from <logan@hackers.mu>.
18817 o Minor features (relay, address discovery):
18818 - Add a family argument to get_interface_addresses_raw() and
18819 subfunctions to make network interface address interogation more
18820 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
18821 types of interfaces from the operating system. Resolves
18823 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
18824 fails to enumerate interface addresses using the platform-specific
18825 API, have it rely on the UDP socket fallback technique to try and
18826 find out what IP addresses (both IPv4 and IPv6) our machine has.
18827 Resolves ticket 17951.
18829 o Minor features (replay cache):
18830 - The replay cache now uses SHA256 instead of SHA1. Implements
18831 feature 8961. Patch by "teor", issue reported by "rransom".
18833 o Minor features (unix file permissions):
18834 - Defer creation of Unix sockets until after setuid. This avoids
18835 needing CAP_CHOWN and CAP_FOWNER when using systemd's
18836 CapabilityBoundingSet, or chown and fowner when using SELinux.
18837 Implements part of ticket 17562. Patch from Jamie Nguyen.
18838 - If any directory created by Tor is marked as group readable, the
18839 filesystem group is allowed to be either the default GID or the
18840 root user. Allowing root to read the DataDirectory prevents the
18841 need for CAP_READ_SEARCH when using systemd's
18842 CapabilityBoundingSet, or dac_read_search when using SELinux.
18843 Implements part of ticket 17562. Patch from Jamie Nguyen.
18844 - Introduce a new DataDirectoryGroupReadable option. If it is set to
18845 1, the DataDirectory will be made readable by the default GID.
18846 Implements part of ticket 17562. Patch from Jamie Nguyen.
18848 o Minor bugfixes (accounting):
18849 - The max bandwidth when using 'AccountRule sum' is now correctly
18850 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
18851 from "unixninja92".
18853 o Minor bugfixes (code correctness):
18854 - When closing an entry connection, generate a warning if we should
18855 have sent an end cell for it but we haven't. Fixes bug 17876;
18856 bugfix on 0.2.3.2-alpha.
18857 - Assert that allocated memory held by the reputation code is freed
18858 according to its internal counters. Fixes bug 17753; bugfix
18860 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
18863 o Minor bugfixes (compilation):
18864 - Mark all object files that include micro-revision.i as depending
18865 on it, so as to make parallel builds more reliable. Fixes bug
18866 17826; bugfix on 0.2.5.1-alpha.
18867 - Don't try to use the pthread_condattr_setclock() function unless
18868 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
18869 17819; bugfix on 0.2.6.3-alpha.
18870 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
18872 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
18873 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
18874 - Fix search for libevent libraries on OpenBSD (and other systems
18875 that install libevent 1 and libevent 2 in parallel). Fixes bug
18876 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
18877 - Isolate environment variables meant for tests from the rest of the
18878 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
18879 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
18881 - Remove config.log only from make distclean, not from make clean.
18882 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
18884 o Minor bugfixes (crypto):
18885 - Check the return value of HMAC() and assert on failure. Fixes bug
18886 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
18888 o Minor bugfixes (fallback directories):
18889 - Mark fallbacks as "too busy" when they return a 503 response,
18890 rather than just marking authorities. Fixes bug 17572; bugfix on
18891 0.2.4.7-alpha. Patch by "teor".
18893 o Minor bugfixes (IPv6):
18894 - Update the limits in max_dl_per_request for IPv6 address length.
18895 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
18897 o Minor bugfixes (linux seccomp2 sandbox):
18898 - Fix a crash when using offline master ed25519 keys with the Linux
18899 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
18901 o Minor bugfixes (logging):
18902 - In log messages that include a function name, use __FUNCTION__
18903 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
18904 with clang __PRETTY_FUNCTION__ has extra information we don't
18905 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
18907 - Remove needless quotes from a log message about unparseable
18908 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
18910 o Minor bugfixes (portability):
18911 - Remove an #endif from configure.ac so that we correctly detect the
18912 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
18915 o Minor bugfixes (relays):
18916 - Check that both the ORPort and DirPort (if present) are reachable
18917 before publishing a relay descriptor. Otherwise, relays publish a
18918 descriptor with DirPort 0 when the DirPort reachability test takes
18919 longer than the ORPort reachability test. Fixes bug 18050; bugfix
18920 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
18922 o Minor bugfixes (relays, hidden services):
18923 - Refuse connection requests to private OR addresses unless
18924 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
18925 then refuse to send any cells to a private address. Fixes bugs
18926 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
18928 o Minor bugfixes (safe logging):
18929 - When logging a malformed hostname received through socks4, scrub
18930 it if SafeLogging says we should. Fixes bug 17419; bugfix
18933 o Minor bugfixes (statistics code):
18934 - Consistently check for overflow in round_*_to_next_multiple_of
18935 functions, and add unit tests with additional and maximal values.
18936 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
18937 - Handle edge cases in the laplace functions: avoid division by
18938 zero, avoid taking the log of zero, and silence clang type
18939 conversion warnings using round and trunc. Add unit tests for edge
18940 cases with maximal values. Fixes part of bug 13192; bugfix
18943 o Minor bugfixes (testing):
18944 - The test for log_heartbeat was incorrectly failing in timezones
18945 with non-integer offsets. Instead of comparing the end of the time
18946 string against a constant, compare it to the output of
18947 format_local_iso_time when given the correct input. Fixes bug
18948 18039; bugfix on 0.2.5.4-alpha.
18949 - Make unit tests pass on IPv6-only systems, and systems without
18950 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
18951 bugfix on 0.2.7.3-rc. Patch by "teor".
18952 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
18954 - Check the full results of SHA256 and SHA512 digests in the unit
18955 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
18957 o Code simplification and refactoring:
18958 - Move logging of redundant policy entries in
18959 policies_parse_exit_policy_internal into its own function. Closes
18960 ticket 17608; patch from "juce".
18961 - Extract the more complicated parts of circuit_mark_for_close()
18962 into a new function that we run periodically before circuits are
18963 freed. This change removes more than half of the functions
18964 currently in the "blob". Closes ticket 17218.
18965 - Clean up a little duplicated code in
18966 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
18968 - Decouple the list of streams waiting to be attached to circuits
18969 from the overall connection list. This change makes it possible to
18970 attach streams quickly while simplifying Tor's callgraph and
18971 avoiding O(N) scans of the entire connection list. Closes
18973 - When a direct directory request fails immediately on launch,
18974 instead of relaunching that request from inside the code that
18975 launches it, instead mark the connection for teardown. This change
18976 simplifies Tor's callback and prevents the directory-request
18977 launching code from invoking itself recursively. Closes
18979 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
18980 use them. Closes ticket 17926.
18983 - Add a description of the correct use of the '--keygen' command-
18984 line option. Closes ticket 17583; based on text by 's7r'.
18985 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
18986 - Explain actual minima for BandwidthRate. Closes ticket 16382.
18987 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
18988 - Mention torspec URL in the manpage and point the reader to it
18989 whenever we mention a document that belongs in torspce. Fixes
18992 o Removed features:
18993 - Remove client-side support for connecting to Tor relays running
18994 versions of Tor before 0.2.3.6-alpha. These relays didn't support
18995 the v3 TLS handshake protocol, and are no longer allowed on the
18996 Tor network. Implements the client side of ticket 11150. Based on
18997 patches by Tom van der Woerdt.
19000 - Add unit tests to check for common RNG failure modes, such as
19001 returning all zeroes, identical values, or incrementing values
19002 (OpenSSL's rand_predictable feature). Patch by "teor".
19003 - Log more information when the backtrace tests fail. Closes ticket
19004 17892. Patch from "cypherpunks."
19005 - Always test both ed25519 backends, so that we can be sure that our
19006 batch-open replacement code works. Part of ticket 16794.
19007 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
19008 portion of ticket 16831.
19009 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
19010 util_format.c, directory.c, and options_validate.c. Closes tickets
19011 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
19013 - Unit tests for directory_handle_command_get. Closes ticket 17004.
19014 Patch from Reinaldo de Souza Jr.
19017 Changes in version 0.2.7.6 - 2015-12-10
19018 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
19019 well as a minor bug in hidden service reliability.
19021 o Major bugfixes (guard selection):
19022 - Actually look at the Guard flag when selecting a new directory
19023 guard. When we implemented the directory guard design, we
19024 accidentally started treating all relays as if they have the Guard
19025 flag during guard selection, leading to weaker anonymity and worse
19026 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
19029 o Minor features (geoip):
19030 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
19033 o Minor bugfixes (compilation):
19034 - When checking for net/pfvar.h, include netinet/in.h if possible.
19035 This fixes transparent proxy detection on OpenBSD. Fixes bug
19036 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
19037 - Fix a compilation warning with Clang 3.6: Do not check the
19038 presence of an address which can never be NULL. Fixes bug 17781.
19040 o Minor bugfixes (correctness):
19041 - When displaying an IPv6 exit policy, include the mask bits
19042 correctly even when the number is greater than 31. Fixes bug
19043 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
19044 - The wrong list was used when looking up expired intro points in a
19045 rend service object, causing what we think could be reachability
19046 issues for hidden services, and triggering a BUG log. Fixes bug
19047 16702; bugfix on 0.2.7.2-alpha.
19048 - Fix undefined behavior in the tor_cert_checksig function. Fixes
19049 bug 17722; bugfix on 0.2.7.2-alpha.
19052 Changes in version 0.2.7.5 - 2015-11-20
19053 The Tor 0.2.7 release series is dedicated to the memory of Tor user
19054 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
19055 tirelessly to advocate human rights regardless of national borders,
19056 and oppose the encroachments of mass surveillance. He opposed national
19057 exceptionalism, he brought clarity to legal and policy debates, he
19058 understood and predicted the impact of mass surveillance on the world,
19059 and he laid the groundwork for resisting it. While serving on the Tor
19060 Project's board of directors, he brought us his uncompromising focus
19061 on technical excellence in the service of humankind. Caspar was an
19062 inimitable force for good and a wonderful friend. He was kind,
19063 humorous, generous, gallant, and believed we should protect one
19064 another without exception. We honor him here for his ideals, his
19065 efforts, and his accomplishments. Please honor his memory with works
19066 that would make him proud.
19068 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
19070 The 0.2.7 series adds a more secure identity key type for relays,
19071 improves cryptography performance, resolves several longstanding
19072 hidden-service performance issues, improves controller support for
19073 hidden services, and includes small bugfixes and performance
19074 improvements throughout the program. This release series also includes
19075 more tests than before, and significant simplifications to which parts
19076 of Tor invoke which others.
19078 (This release contains no code changes since 0.2.7.4-rc.)
19081 Changes in version 0.2.7.4-rc - 2015-10-21
19082 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
19083 fixes some important memory leaks, and a scary-looking (but mostly
19084 harmless in practice) invalid-read bug. It also has a few small
19085 bugfixes, notably fixes for compilation and portability on different
19086 platforms. If no further significant bounds are found, the next
19087 release will the the official stable release.
19089 o Major bugfixes (security, correctness):
19090 - Fix an error that could cause us to read 4 bytes before the
19091 beginning of an openssl string. This bug could be used to cause
19092 Tor to crash on systems with unusual malloc implementations, or
19093 systems with unusual hardening installed. Fixes bug 17404; bugfix
19096 o Major bugfixes (correctness):
19097 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
19098 bug 17401; bugfix on 0.2.7.3-rc.
19100 o Major bugfixes (memory leaks):
19101 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
19102 17398; bugfix on 0.2.6.1-alpha.
19103 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
19104 17402; bugfix on 0.2.7.3-rc.
19105 - Fix a memory leak when reading an expired signing key from disk.
19106 Fixes bug 17403; bugfix on 0.2.7.2-rc.
19108 o Minor features (geoIP):
19109 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
19112 o Minor bugfixes (compilation):
19113 - Repair compilation with the most recent (unreleased, alpha)
19114 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
19115 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
19116 17251; bugfix on 0.2.7.2-alpha.
19117 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
19118 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
19120 o Minor bugfixes (portability):
19121 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
19122 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
19125 o Minor bugfixes (sandbox):
19126 - Add the "hidserv-stats" filename to our sandbox filter for the
19127 HiddenServiceStatistics option to work properly. Fixes bug 17354;
19128 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
19130 o Minor bugfixes (testing):
19131 - Add unit tests for get_interface_address* failure cases. Fixes bug
19132 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
19133 - Fix breakage when running 'make check' with BSD make. Fixes bug
19134 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
19135 - Make the get_ifaddrs_* unit tests more tolerant of different
19136 network configurations. (Don't assume every test box has an IPv4
19137 address, and don't assume every test box has a non-localhost
19138 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
19139 - Skip backtrace tests when backtrace support is not compiled in.
19140 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
19144 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
19145 - Note that HiddenServicePorts can take a unix domain socket. Closes
19149 Changes in version 0.2.7.3-rc - 2015-09-25
19150 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
19151 contains numerous usability fixes for Ed25519 keys, safeguards against
19152 several misconfiguration problems, significant simplifications to
19153 Tor's callgraph, and numerous bugfixes and small features.
19155 This is the most tested release of Tor to date. The unit tests cover
19156 39.40% of the code, and the integration tests (accessible with "make
19157 test-full-online", requiring stem and chutney and a network
19158 connection) raise the coverage to 64.49%.
19160 o Major features (security, hidden services):
19161 - Hidden services, if using the EntryNodes option, are required to
19162 use more than one EntryNode, in order to avoid a guard discovery
19163 attack. (This would only affect people who had configured hidden
19164 services and manually specified the EntryNodes option with a
19165 single entry-node. The impact was that it would be easy to
19166 remotely identify the guard node used by such a hidden service.
19167 See ticket for more information.) Fixes ticket 14917.
19169 o Major features (Ed25519 keys, keypinning):
19170 - The key-pinning option on directory authorities is now advisory-
19171 only by default. In a future version, or when the AuthDirPinKeys
19172 option is set, pins are enforced again. Disabling key-pinning
19173 seemed like a good idea so that we can survive the fallout of any
19174 usability problems associated with Ed25519 keys. Closes
19177 o Major features (Ed25519 performance):
19178 - Improve the speed of Ed25519 operations and Curve25519 keypair
19179 generation when built targeting 32 bit x86 platforms with SSE2
19180 available. Implements ticket 16535.
19181 - Improve the runtime speed of Ed25519 signature verification by
19182 using Ed25519-donna's batch verification support. Implements
19185 o Major features (performance testing):
19186 - The test-network.sh script now supports performance testing.
19187 Requires corresponding chutney performance testing changes. Patch
19188 by "teor". Closes ticket 14175.
19190 o Major features (relay, Ed25519):
19191 - Significant usability improvements for Ed25519 key management. Log
19192 messages are better, and the code can recover from far more
19193 failure conditions. Thanks to "s7r" for reporting and diagnosing
19195 - Add a new OfflineMasterKey option to tell Tor never to try loading
19196 or generating a secret Ed25519 identity key. You can use this in
19197 combination with tor --keygen to manage offline and/or encrypted
19198 Ed25519 keys. Implements ticket 16944.
19199 - Add a --newpass option to allow changing or removing the
19200 passphrase of an encrypted key with tor --keygen. Implements part
19202 - On receiving a HUP signal, check to see whether the Ed25519
19203 signing key has changed, and reload it if so. Closes ticket 16790.
19205 o Major bugfixes (relay, Ed25519):
19206 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
19207 0.2.7.2-alpha. Reported by "s7r".
19208 - Improve handling of expired signing keys with offline master keys.
19209 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
19211 o Minor features (client-side privacy):
19212 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
19213 lifespan when IsolateSOCKSAuth and streams with SOCKS
19214 authentication are attached to the circuit. This allows
19215 applications like TorBrowser to manage circuit lifetime on their
19216 own. Implements feature 15482.
19217 - When logging malformed hostnames from SOCKS5 requests, respect
19218 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
19220 o Minor features (compilation):
19221 - Give a warning as early as possible when trying to build with an
19222 unsupported OpenSSL version. Closes ticket 16901.
19223 - Fail during configure if we're trying to build against an OpenSSL
19224 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
19225 which started requiring ECC.
19227 o Minor features (geoip):
19228 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
19231 o Minor features (hidden services):
19232 - Relays need to have the Fast flag to get the HSDir flag. As this
19233 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
19234 drop. This change should make some attacks against the hidden
19235 service directory system harder. Fixes ticket 15963.
19236 - Turn on hidden service statistics collection by setting the torrc
19237 option HiddenServiceStatistics to "1" by default. (This keeps
19238 track only of the fraction of traffic used by hidden services, and
19239 the total number of hidden services in existence.) Closes
19241 - Client now uses an introduction point failure cache to know when
19242 to fetch or keep a descriptor in their cache. Previously, failures
19243 were recorded implicitly, but not explicitly remembered. Closes
19246 o Minor features (testing, authorities, documentation):
19247 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
19248 explicitly manage consensus flags in testing networks. Patch by
19249 "robgjansen", modified by "teor". Implements part of ticket 14882.
19251 o Minor bugfixes (security, exit policies):
19252 - ExitPolicyRejectPrivate now also rejects the relay's published
19253 IPv6 address (if any), and any publicly routable IPv4 or IPv6
19254 addresses on any local interfaces. ticket 17027. Patch by "teor".
19255 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
19257 o Minor bug fixes (torrc exit policies):
19258 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
19259 produce IPv6 wildcard addresses. Previously they would produce
19260 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
19261 of bug 16069; bugfix on 0.2.4.7-alpha.
19262 - When parsing torrc ExitPolicies, we now warn for a number of cases
19263 where the user's intent is likely to differ from Tor's actual
19264 behavior. These include: using an IPv4 address with an accept6 or
19265 reject6 line; using "private" on an accept6 or reject6 line; and
19266 including any ExitPolicy lines after accept *:* or reject *:*.
19267 Related to ticket 16069.
19268 - When parsing torrc ExitPolicies, we now issue an info-level
19269 message when expanding an "accept/reject *" line to include both
19270 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
19271 - In each instance above, usage advice is provided to avoid the
19272 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
19273 16069; bugfix on 0.2.4.7-alpha.
19275 o Minor bugfixes (authority):
19276 - Don't assign "HSDir" to a router if it isn't Valid and Running.
19277 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
19278 - Downgrade log messages about Ed25519 key issues if they are in old
19279 cached router descriptors. Fixes part of bug 16286; bugfix
19281 - When we find an Ed25519 key issue in a cached descriptor, stop
19282 saying the descriptor was just "uploaded". Fixes another part of
19283 bug 16286; bugfix on 0.2.7.2-alpha.
19285 o Minor bugfixes (control port):
19286 - Repair a warning and a spurious result when getting the maximum
19287 number of file descriptors from the controller. Fixes bug 16697;
19288 bugfix on 0.2.7.2-alpha.
19290 o Minor bugfixes (correctness):
19291 - When calling channel_free_list(), avoid calling smartlist_remove()
19292 while inside a FOREACH loop. This partially reverts commit
19293 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
19294 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
19296 o Minor bugfixes (documentation):
19297 - Advise users on how to configure separate IPv4 and IPv6 exit
19298 policies in the manpage and sample torrcs. Related to ticket 16069.
19299 - Fix the usage message of tor-resolve(1) so that it no longer lists
19300 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
19301 - Fix an error in the manual page and comments for
19302 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
19303 required "ORPort connectivity". While this is true, it is in no
19304 way unique to the HSDir flag. Of all the flags, only HSDirs need a
19305 DirPort configured in order for the authorities to assign that
19306 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
19309 o Minor bugfixes (Ed25519):
19310 - Fix a memory leak when reading router descriptors with expired
19311 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
19313 o Minor bugfixes (linux seccomp2 sandbox):
19314 - Allow bridge authorities to run correctly under the seccomp2
19315 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
19316 - Allow routers with ed25519 keys to run correctly under the
19317 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
19319 o Minor bugfixes (open file limit):
19320 - Fix set_max_file_descriptors() to set by default the max open file
19321 limit to the current limit when setrlimit() fails. Fixes bug
19322 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
19324 o Minor bugfixes (portability):
19325 - Try harder to normalize the exit status of the Tor process to the
19326 standard-provided range. Fixes bug 16975; bugfix on every version
19328 - Check correctly for Windows socket errors in the workqueue
19329 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
19330 - Fix the behavior of crypto_rand_time_range() when told to consider
19331 times before 1970. (These times were possible when running in a
19332 simulated network environment where time()'s output starts at
19333 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
19334 - Restore correct operation of TLS client-cipher detection on
19335 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
19337 o Minor bugfixes (relay):
19338 - Ensure that worker threads actually exit when a fatal error or
19339 shutdown is indicated. This fix doesn't currently affect the
19340 behavior of Tor, because Tor workers never indicates fatal error
19341 or shutdown except in the unit tests. Fixes bug 16868; bugfix
19343 - Unblock threads before releasing the work queue mutex to ensure
19344 predictable scheduling behavior. Fixes bug 16644; bugfix
19347 o Code simplification and refactoring:
19348 - Change the function that's called when we need to retry all
19349 downloads so that it only reschedules the downloads to happen
19350 immediately, rather than launching them all at once itself. This
19351 further simplifies Tor's callgraph.
19352 - Move some format-parsing functions out of crypto.c and
19353 crypto_curve25519.c into crypto_format.c and/or util_format.c.
19354 - Move the client-only parts of init_keys() into a separate
19355 function. Closes ticket 16763.
19356 - Simplify the microdesc_free() implementation so that it no longer
19357 appears (to code analysis tools) to potentially invoke a huge
19358 suite of other microdesc functions.
19359 - Simply the control graph further by deferring the inner body of
19360 directory_all_unreachable() into a callback. Closes ticket 16762.
19361 - Treat the loss of an owning controller as equivalent to a SIGTERM
19362 signal. This removes a tiny amount of duplicated code, and
19363 simplifies our callgraph. Closes ticket 16788.
19364 - When generating an event to send to the controller, we no longer
19365 put the event over the network immediately. Instead, we queue
19366 these events, and use a Libevent callback to deliver them. This
19367 change simplifies Tor's callgraph by reducing the number of
19368 functions from which all other Tor functions are reachable. Closes
19370 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
19371 that try to scan or compile every file on Unix won't decide that
19373 - Remove the unused "nulterminate" argument from buf_pullup().
19376 - Recommend a 40 GB example AccountingMax in torrc.sample rather
19377 than a 4 GB max. Closes ticket 16742.
19378 - Include the TUNING document in our source tarball. It is referred
19379 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
19383 - The internal pure-C tor-fw-helper tool is now removed from the Tor
19384 distribution, in favor of the pure-Go clone available from
19385 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
19386 used by the C tor-fw-helper are not, in our opinion, very
19387 confidence- inspiring in their secure-programming techniques.
19388 Closes ticket 13338.
19389 - Remove the code that would try to aggressively flush controller
19390 connections while writing to them. This code was introduced in
19391 0.1.2.7-alpha, in order to keep output buffers from exceeding
19392 their limits. But there is no longer a maximum output buffer size,
19393 and flushing data in this way caused some undesirable recursions
19394 in our call graph. Closes ticket 16480.
19397 - Make "bridges+hs" the default test network. This tests almost all
19398 tor functionality during make test-network, while allowing tests
19399 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
19400 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
19401 (chutney). Patches by "teor".
19402 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
19403 by-side in the same parent directory. Closes ticket 16903. Patch
19405 - Use environment variables rather than autoconf substitutions to
19406 send variables from the build system to the test scripts. This
19407 change should be easier to maintain, and cause 'make distcheck' to
19408 work better than before. Fixes bug 17148.
19409 - Add a new set of callgraph analysis scripts that use clang to
19410 produce a list of which Tor functions are reachable from which
19411 other Tor functions. We're planning to use these to help simplify
19412 our code structure by identifying illogical dependencies.
19413 - Add new 'test-full' and 'test-full-online' targets to run all
19414 tests, including integration tests with stem and chutney.
19415 - Make the test-workqueue test work on Windows by initializing the
19416 network before we begin.
19417 - New make target (make test-network-all) to run multiple applicable
19418 chutney test cases. Patch from Teor; closes 16953.
19419 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
19420 functions in dns.c. Implements a portion of ticket 16831.
19421 - When building Tor with testing coverage enabled, run Chutney tests
19422 (if any) using the 'tor-cov' coverage binary.
19423 - When running test-network or test-stem, check for the absence of
19424 stem/chutney before doing any build operations.
19427 Changes in version 0.2.7.2-alpha - 2015-07-27
19428 This, the second alpha in the Tor 0.2.7 series, has a number of new
19429 features, including a way to manually pick the number of introduction
19430 points for hidden services, and the much stronger Ed25519 signing key
19431 algorithm for regular Tor relays (including support for encrypted
19432 offline identity keys in the new algorithm).
19434 Support for Ed25519 on relays is currently limited to signing router
19435 descriptors; later alphas in this series will extend Ed25519 key
19436 support to more parts of the Tor protocol.
19438 o Major features (Ed25519 identity keys, Proposal 220):
19439 - All relays now maintain a stronger identity key, using the Ed25519
19440 elliptic curve signature format. This master key is designed so
19441 that it can be kept offline. Relays also generate an online
19442 signing key, and a set of other Ed25519 keys and certificates.
19443 These are all automatically regenerated and rotated as needed.
19444 Implements part of ticket 12498.
19445 - Directory authorities now vote on Ed25519 identity keys along with
19446 RSA1024 keys. Implements part of ticket 12498.
19447 - Directory authorities track which Ed25519 identity keys have been
19448 used with which RSA1024 identity keys, and do not allow them to
19449 vary freely. Implements part of ticket 12498.
19450 - Microdescriptors now include Ed25519 identity keys. Implements
19451 part of ticket 12498.
19452 - Add support for offline encrypted Ed25519 master keys. To use this
19453 feature on your tor relay, run "tor --keygen" to make a new master
19454 key (or to make a new signing key if you already have a master
19455 key). Closes ticket 13642.
19457 o Major features (Hidden services):
19458 - Add the torrc option HiddenServiceNumIntroductionPoints, to
19459 specify a fixed number of introduction points. Its maximum value
19460 is 10 and default is 3. Using this option can increase a hidden
19461 service's reliability under load, at the cost of making it more
19462 visible that the hidden service is facing extra load. Closes
19464 - Remove the adaptive algorithm for choosing the number of
19465 introduction points, which used to change the number of
19466 introduction points (poorly) depending on the number of
19467 connections the HS sees. Closes ticket 4862.
19469 o Major features (onion key cross-certification):
19470 - Relay descriptors now include signatures of their own identity
19471 keys, made using the TAP and ntor onion keys. These signatures
19472 allow relays to prove ownership of their own onion keys. Because
19473 of this change, microdescriptors will no longer need to include
19474 RSA identity keys. Implements proposal 228; closes ticket 12499.
19476 o Major features (performance):
19477 - Improve the runtime speed of Ed25519 operations by using the
19478 public-domain Ed25519-donna by Andrew M. ("floodyberry").
19479 Implements ticket 16467.
19480 - Improve the runtime speed of the ntor handshake by using an
19481 optimized curve25519 basepoint scalarmult implementation from the
19482 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
19483 ideas by Adam Langley. Implements ticket 9663.
19485 o Major bugfixes (client-side privacy, also in 0.2.6.9):
19486 - Properly separate out each SOCKSPort when applying stream
19487 isolation. The error occurred because each port's session group
19488 was being overwritten by a default value when the listener
19489 connection was initialized. Fixes bug 16247; bugfix on
19490 0.2.6.3-alpha. Patch by "jojelino".
19492 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
19493 - Stop refusing to store updated hidden service descriptors on a
19494 client. This reverts commit 9407040c59218 (which indeed fixed bug
19495 14219, but introduced a major hidden service reachability
19496 regression detailed in bug 16381). This is a temporary fix since
19497 we can live with the minor issue in bug 14219 (it just results in
19498 some load on the network) but the regression of 16381 is too much
19499 of a setback. First-round fix for bug 16381; bugfix
19502 o Major bugfixes (hidden services):
19503 - When cannibalizing a circuit for an introduction point, always
19504 extend to the chosen exit node (creating a 4 hop circuit).
19505 Previously Tor would use the current circuit exit node, which
19506 changed the original choice of introduction point, and could cause
19507 the hidden service to skip excluded introduction points or
19508 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
19511 o Major bugfixes (open file limit):
19512 - The open file limit wasn't checked before calling
19513 tor_accept_socket_nonblocking(), which would make Tor exceed the
19514 limit. Now, before opening a new socket, Tor validates the open
19515 file limit just before, and if the max has been reached, return an
19516 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
19518 o Major bugfixes (stability, also in 0.2.6.10):
19519 - Stop crashing with an assertion failure when parsing certain kinds
19520 of malformed or truncated microdescriptors. Fixes bug 16400;
19521 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
19522 by "cypherpunks_backup".
19523 - Stop random client-side assertion failures that could occur when
19524 connecting to a busy hidden service, or connecting to a hidden
19525 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
19528 o Minor features (directory authorities, security, also in 0.2.6.9):
19529 - The HSDir flag given by authorities now requires the Stable flag.
19530 For the current network, this results in going from 2887 to 2806
19531 HSDirs. Also, it makes it harder for an attacker to launch a sybil
19532 attack by raising the effort for a relay to become Stable to
19533 require at the very least 7 days, while maintaining the 96 hours
19534 uptime requirement for HSDir. Implements ticket 8243.
19536 o Minor features (client):
19537 - Relax the validation of hostnames in SOCKS5 requests, allowing the
19538 character '_' to appear, in order to cope with domains observed in
19539 the wild that are serving non-RFC compliant records. Resolves
19541 - Relax the validation done to hostnames in SOCKS5 requests, and
19542 allow a single trailing '.' to cope with clients that pass FQDNs
19543 using that syntax to explicitly indicate that the domain name is
19544 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
19545 - Add GroupWritable and WorldWritable options to unix-socket based
19546 SocksPort and ControlPort options. These options apply to a single
19547 socket, and override {Control,Socks}SocketsGroupWritable. Closes
19550 o Minor features (control protocol):
19551 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
19552 the control protocol. Resolves ticket 15358.
19554 o Minor features (directory authorities):
19555 - Directory authorities no longer vote against the "Fast", "Stable",
19556 and "HSDir" flags just because they were going to vote against
19557 "Running": if the consensus turns out to be that the router was
19558 running, then the authority's vote should count. Patch from Peter
19559 Retzlaff; closes issue 8712.
19561 o Minor features (geoip, also in 0.2.6.10):
19562 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
19563 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
19565 o Minor features (hidden services):
19566 - Add the new options "HiddenServiceMaxStreams" and
19567 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
19568 limit the maximum number of simultaneous streams per circuit, and
19569 optionally tear down the circuit when the limit is exceeded. Part
19572 o Minor features (portability):
19573 - Use C99 variadic macros when the compiler is not GCC. This avoids
19574 failing compilations on MSVC, and fixes a log-file-based race
19575 condition in our old workarounds. Original patch from Gisle Vanem.
19577 o Minor bugfixes (compilation, also in 0.2.6.9):
19578 - Build with --enable-systemd correctly when libsystemd is
19579 installed, but systemd is not. Fixes bug 16164; bugfix on
19580 0.2.6.3-alpha. Patch from Peter Palfrader.
19582 o Minor bugfixes (controller):
19583 - Add the descriptor ID in each HS_DESC control event. It was
19584 missing, but specified in control-spec.txt. Fixes bug 15881;
19585 bugfix on 0.2.5.2-alpha.
19587 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
19588 - Check for failures from crypto_early_init, and refuse to continue.
19589 A previous typo meant that we could keep going with an
19590 uninitialized crypto library, and would have OpenSSL initialize
19591 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
19592 when implementing ticket 4900. Patch by "teor".
19594 o Minor bugfixes (hidden services):
19595 - Fix a crash when reloading configuration while at least one
19596 configured and one ephemeral hidden service exists. Fixes bug
19597 16060; bugfix on 0.2.7.1-alpha.
19598 - Avoid crashing with a double-free bug when we create an ephemeral
19599 hidden service but adding it fails for some reason. Fixes bug
19600 16228; bugfix on 0.2.7.1-alpha.
19602 o Minor bugfixes (Linux seccomp2 sandbox):
19603 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
19604 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
19606 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
19607 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
19608 these when eventfd2() support is missing. Fixes bug 16363; bugfix
19609 on 0.2.6.3-alpha. Patch from "teor".
19611 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
19612 - Fix sandboxing to work when running as a relay, by allowing the
19613 renaming of secret_id_key, and allowing the eventfd2 and futex
19614 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
19616 - Allow systemd connections to work with the Linux seccomp2 sandbox
19617 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
19620 o Minor bugfixes (relay):
19621 - Fix a rarely-encountered memory leak when failing to initialize
19622 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
19623 from "cypherpunks".
19625 o Minor bugfixes (systemd):
19626 - Fix an accidental formatting error that broke the systemd
19627 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
19628 - Tor's systemd unit file no longer contains extraneous spaces.
19629 These spaces would sometimes confuse tools like deb-systemd-
19630 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
19632 o Minor bugfixes (tests):
19633 - Use the configured Python executable when running test-stem-full.
19634 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
19636 o Minor bugfixes (tests, also in 0.2.6.9):
19637 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
19638 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
19640 o Minor bugfixes (threads, comments):
19641 - Always initialize return value in compute_desc_id in rendcommon.c
19642 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19643 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
19644 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19645 - Remove undefined directive-in-macro in test_util_writepid clang
19646 3.7 complains that using a preprocessor directive inside a macro
19647 invocation in test_util_writepid in test_util.c is undefined.
19648 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
19650 o Code simplification and refactoring:
19651 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
19652 to ensure they remain consistent and visible everywhere.
19653 - Remove some vestigial workarounds for the MSVC6 compiler. We
19654 haven't supported that in ages.
19655 - The link authentication code has been refactored for better
19656 testability and reliability. It now uses code generated with the
19657 "trunnel" binary encoding generator, to reduce the risk of bugs
19658 due to programmer error. Done as part of ticket 12498.
19661 - Include a specific and (hopefully) accurate documentation of the
19662 torrc file's meta-format in doc/torrc_format.txt. This is mainly
19663 of interest to people writing programs to parse or generate torrc
19664 files. This document is not a commitment to long-term
19665 compatibility; some aspects of the current format are a bit
19666 ridiculous. Closes ticket 2325.
19668 o Removed features:
19669 - Tor no longer supports copies of OpenSSL that are missing support
19670 for Elliptic Curve Cryptography. (We began using ECC when
19671 available in 0.2.4.8-alpha, for more safe and efficient key
19672 negotiation.) In particular, support for at least one of P256 or
19673 P224 is now required, with manual configuration needed if only
19674 P224 is available. Resolves ticket 16140.
19675 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
19676 on an operating system that has not upgraded to OpenSSL 1.0 or
19677 later, and you compile Tor from source, you will need to install a
19678 more recent OpenSSL to link Tor against.) These versions of
19679 OpenSSL are still supported by the OpenSSL, but the numerous
19680 cryptographic improvements in later OpenSSL releases makes them a
19681 clear choice. Resolves ticket 16034.
19682 - Remove the HidServDirectoryV2 option. Now all relays offer to
19683 store hidden service descriptors. Related to 16543.
19684 - Remove the VoteOnHidServDirectoriesV2 option, since all
19685 authorities have long set it to 1. Closes ticket 16543.
19688 - Document use of coverity, clang static analyzer, and clang dynamic
19689 undefined behavior and address sanitizers in doc/HACKING. Include
19690 detailed usage instructions in the blacklist. Patch by "teor".
19691 Closes ticket 15817.
19692 - The link authentication protocol code now has extensive tests.
19693 - The relay descriptor signature testing code now has
19695 - The test_workqueue program now runs faster, and is enabled by
19696 default as a part of "make check".
19697 - Now that OpenSSL has its own scrypt implementation, add an unit
19698 test that checks for interoperability between libscrypt_scrypt()
19699 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
19700 and rely on EVP_PBE_scrypt() whenever possible. Resolves
19704 Changes in version 0.2.6.10 - 2015-07-12
19705 Tor version 0.2.6.10 fixes some significant stability and hidden
19706 service client bugs, bulletproofs the cryptography init process, and
19707 fixes a bug when using the sandbox code with some older versions of
19708 Linux. Everyone running an older version, especially an older version
19709 of 0.2.6, should upgrade.
19711 o Major bugfixes (hidden service clients, stability):
19712 - Stop refusing to store updated hidden service descriptors on a
19713 client. This reverts commit 9407040c59218 (which indeed fixed bug
19714 14219, but introduced a major hidden service reachability
19715 regression detailed in bug 16381). This is a temporary fix since
19716 we can live with the minor issue in bug 14219 (it just results in
19717 some load on the network) but the regression of 16381 is too much
19718 of a setback. First-round fix for bug 16381; bugfix
19721 o Major bugfixes (stability):
19722 - Stop crashing with an assertion failure when parsing certain kinds
19723 of malformed or truncated microdescriptors. Fixes bug 16400;
19724 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
19725 by "cypherpunks_backup".
19726 - Stop random client-side assertion failures that could occur when
19727 connecting to a busy hidden service, or connecting to a hidden
19728 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
19731 o Minor features (geoip):
19732 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
19733 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
19735 o Minor bugfixes (crypto error-handling):
19736 - Check for failures from crypto_early_init, and refuse to continue.
19737 A previous typo meant that we could keep going with an
19738 uninitialized crypto library, and would have OpenSSL initialize
19739 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
19740 when implementing ticket 4900. Patch by "teor".
19742 o Minor bugfixes (Linux seccomp2 sandbox):
19743 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
19744 these when eventfd2() support is missing. Fixes bug 16363; bugfix
19745 on 0.2.6.3-alpha. Patch from "teor".
19748 Changes in version 0.2.6.9 - 2015-06-11
19749 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
19750 requirements for receiving an HSDir flag, and addresses some other small
19751 bugs in the systemd and sandbox code. Clients using circuit isolation
19752 should upgrade; all directory authorities should upgrade.
19754 o Major bugfixes (client-side privacy):
19755 - Properly separate out each SOCKSPort when applying stream
19756 isolation. The error occurred because each port's session group was
19757 being overwritten by a default value when the listener connection
19758 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
19761 o Minor feature (directory authorities, security):
19762 - The HSDir flag given by authorities now requires the Stable flag.
19763 For the current network, this results in going from 2887 to 2806
19764 HSDirs. Also, it makes it harder for an attacker to launch a sybil
19765 attack by raising the effort for a relay to become Stable which
19766 takes at the very least 7 days to do so and by keeping the 96
19767 hours uptime requirement for HSDir. Implements ticket 8243.
19769 o Minor bugfixes (compilation):
19770 - Build with --enable-systemd correctly when libsystemd is
19771 installed, but systemd is not. Fixes bug 16164; bugfix on
19772 0.2.6.3-alpha. Patch from Peter Palfrader.
19774 o Minor bugfixes (Linux seccomp2 sandbox):
19775 - Fix sandboxing to work when running as a relaymby renaming of
19776 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
19777 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
19778 - Allow systemd connections to work with the Linux seccomp2 sandbox
19779 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
19782 o Minor bugfixes (tests):
19783 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
19784 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
19787 Changes in version 0.2.6.8 - 2015-05-21
19788 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
19789 fixes an authority-side bug in assigning the HSDir flag. All directory
19790 authorities should upgrade.
19792 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
19793 - Revert commit that made directory authorities assign the HSDir
19794 flag to relays without a DirPort; this was bad because such relays
19795 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
19798 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
19799 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
19800 a client authorized hidden service. Fixes bug 15823; bugfix
19803 o Minor features (geoip):
19804 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
19805 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
19809 Changes in version 0.2.7.1-alpha - 2015-05-12
19810 Tor 0.2.7.1-alpha is the first alpha release in its series. It
19811 includes numerous small features and bugfixes against previous Tor
19812 versions, and numerous small infrastructure improvements. The most
19813 notable features are several new ways for controllers to interact with
19814 the hidden services subsystem.
19816 o New system requirements:
19817 - Tor no longer includes workarounds to support Libevent versions
19818 before 1.3e. Libevent 2.0 or later is recommended. Closes
19821 o Major features (controller):
19822 - Add the ADD_ONION and DEL_ONION commands that allow the creation
19823 and management of hidden services via the controller. Closes
19825 - New "GETINFO onions/current" and "GETINFO onions/detached"
19826 commands to get information about hidden services created via the
19827 controller. Part of ticket 6411.
19828 - New HSFETCH command to launch a request for a hidden service
19829 descriptor. Closes ticket 14847.
19830 - New HSPOST command to upload a hidden service descriptor. Closes
19831 ticket 3523. Patch by "DonnchaC".
19833 o Major bugfixes (hidden services):
19834 - Revert commit that made directory authorities assign the HSDir
19835 flag to relays without a DirPort; this was bad because such relays
19836 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
19839 o Minor features (clock-jump tolerance):
19840 - Recover better when our clock jumps back many hours, like might
19841 happen for Tails or Whonix users who start with a very wrong
19842 hardware clock, use Tor to discover a more accurate time, and then
19843 fix their clock. Resolves part of ticket 8766.
19845 o Minor features (command-line interface):
19846 - Make --hash-password imply --hush to prevent unnecessary noise.
19847 Closes ticket 15542. Patch from "cypherpunks".
19848 - Print a warning whenever we find a relative file path being used
19849 as torrc option. Resolves issue 14018.
19851 o Minor features (controller):
19852 - Add DirAuthority lines for default directory authorities to the
19853 output of the "GETINFO config/defaults" command if not already
19854 present. Implements ticket 14840.
19855 - Controllers can now use "GETINFO hs/client/desc/id/..." to
19856 retrieve items from the client's hidden service descriptor cache.
19857 Closes ticket 14845.
19858 - Implement a new controller command "GETINFO status/fresh-relay-
19859 descs" to fetch a descriptor/extrainfo pair that was generated on
19860 demand just for the controller's use. Implements ticket 14784.
19862 o Minor features (DoS-resistance):
19863 - Make it harder for attackers to overload hidden services with
19864 introductions, by blocking multiple introduction requests on the
19865 same circuit. Resolves ticket 15515.
19867 o Minor features (geoip):
19868 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
19869 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
19872 o Minor features (HS popularity countermeasure):
19873 - To avoid leaking HS popularity, don't cycle the introduction point
19874 when we've handled a fixed number of INTRODUCE2 cells but instead
19875 cycle it when a random number of introductions is reached, thus
19876 making it more difficult for an attacker to find out the amount of
19877 clients that have used the introduction point for a specific HS.
19878 Closes ticket 15745.
19880 o Minor features (logging):
19881 - Include the Tor version in all LD_BUG log messages, since people
19882 tend to cut and paste those into the bugtracker. Implements
19885 o Minor features (pluggable transports):
19886 - When launching managed pluggable transports on Linux systems,
19887 attempt to have the kernel deliver a SIGTERM on tor exit if the
19888 pluggable transport process is still running. Resolves
19890 - When launching managed pluggable transports, setup a valid open
19891 stdin in the child process that can be used to detect if tor has
19892 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
19893 can be used by implementations to detect this new behavior.
19894 Resolves ticket 15435.
19896 o Minor features (testing):
19897 - Add a test to verify that the compiler does not eliminate our
19898 memwipe() implementation. Closes ticket 15377.
19899 - Add make rule `check-changes` to verify the format of changes
19900 files. Closes ticket 15180.
19901 - Add unit tests for control_event_is_interesting(). Add a compile-
19902 time check that the number of events doesn't exceed the capacity
19903 of control_event_t.event_mask. Closes ticket 15431, checks for
19904 bugs similar to 13085. Patch by "teor".
19905 - Command-line argument tests moved to Stem. Resolves ticket 14806.
19906 - Integrate the ntor, backtrace, and zero-length keys tests into the
19907 automake test suite. Closes ticket 15344.
19908 - Remove assertions during builds to determine Tor's test coverage.
19909 We don't want to trigger these even in assertions, so including
19910 them artificially makes our branch coverage look worse than it is.
19911 This patch provides the new test-stem-full and coverage-html-full
19912 configure options. Implements ticket 15400.
19914 o Minor bugfixes (build):
19915 - Improve out-of-tree builds by making non-standard rules work and
19916 clean up additional files and directories. Fixes bug 15053; bugfix
19919 o Minor bugfixes (command-line interface):
19920 - When "--quiet" is provided along with "--validate-config", do not
19921 write anything to stdout on success. Fixes bug 14994; bugfix
19923 - When complaining about bad arguments to "--dump-config", use
19924 stderr, not stdout.
19926 o Minor bugfixes (configuration, unit tests):
19927 - Only add the default fallback directories when the DirAuthorities,
19928 AlternateDirAuthority, and FallbackDir directory config options
19929 are set to their defaults. The default fallback directory list is
19930 currently empty, this fix will only change tor's behavior when it
19931 has default fallback directories. Includes unit tests for
19932 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
19933 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
19935 o Minor bugfixes (correctness):
19936 - For correctness, avoid modifying a constant string in
19937 handle_control_postdescriptor. Fixes bug 15546; bugfix
19939 - Remove side-effects from tor_assert() calls. This was harmless,
19940 because we never disable assertions, but it is bad style and
19941 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
19944 o Minor bugfixes (hidden service):
19945 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
19946 a client authorized hidden service. Fixes bug 15823; bugfix
19948 - Remove an extraneous newline character from the end of hidden
19949 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
19951 o Minor bugfixes (interface):
19952 - Print usage information for --dump-config when it is used without
19953 an argument. Also, fix the error message to use different wording
19954 and add newline at the end. Fixes bug 15541; bugfix
19957 o Minor bugfixes (logs):
19958 - When building Tor under Clang, do not include an extra set of
19959 parentheses in log messages that include function names. Fixes bug
19960 15269; bugfix on every released version of Tor when compiled with
19961 recent enough Clang.
19963 o Minor bugfixes (network):
19964 - When attempting to use fallback technique for network interface
19965 lookup, disregard loopback and multicast addresses since they are
19966 unsuitable for public communications.
19968 o Minor bugfixes (statistics):
19969 - Disregard the ConnDirectionStatistics torrc options when Tor is
19970 not a relay since in that mode of operation no sensible data is
19971 being collected and because Tor might run into measurement hiccups
19972 when running as a client for some time, then becoming a relay.
19973 Fixes bug 15604; bugfix on 0.2.2.35.
19975 o Minor bugfixes (test networks):
19976 - When self-testing reachability, use ExtendAllowPrivateAddresses to
19977 determine if local/private addresses imply reachability. The
19978 previous fix used TestingTorNetwork, which implies
19979 ExtendAllowPrivateAddresses, but this excluded rare configurations
19980 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
19981 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
19982 issue discovered by CJ Ess.
19984 o Minor bugfixes (testing):
19985 - Check for matching value in server response in ntor_ref.py. Fixes
19986 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
19988 - Set the severity correctly when testing
19989 get_interface_addresses_ifaddrs() and
19990 get_interface_addresses_win32(), so that the tests fail gracefully
19991 instead of triggering an assertion. Fixes bug 15759; bugfix on
19992 0.2.6.3-alpha. Reported by Nicolas Derive.
19994 o Code simplification and refactoring:
19995 - Move the hacky fallback code out of get_interface_address6() into
19996 separate function and get it covered with unit-tests. Resolves
19998 - Refactor hidden service client-side cache lookup to intelligently
19999 report its various failure cases, and disentangle failure cases
20000 involving a lack of introduction points. Closes ticket 14391.
20001 - Use our own Base64 encoder instead of OpenSSL's, to allow more
20002 control over the output. Part of ticket 15652.
20005 - Improve the descriptions of statistics-related torrc options in
20006 the manpage to describe rationale and possible uses cases. Fixes
20008 - Improve the layout and formatting of ./configure --help messages.
20009 Closes ticket 15024. Patch from "cypherpunks".
20010 - Standardize on the term "server descriptor" in the manual page.
20011 Previously, we had used "router descriptor", "server descriptor",
20012 and "relay descriptor" interchangeably. Part of ticket 14987.
20015 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
20016 and always use the internal Base64 decoder. The internal decoder
20017 has been part of tor since 0.2.0.10-alpha, and no one should
20018 be using the OpenSSL one. Part of ticket 15652.
20019 - Remove the 'tor_strclear()' function; use memwipe() instead.
20020 Closes ticket 14922.
20022 o Removed features:
20023 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
20024 fingerprinting we now recommend pluggable transports; for forward-
20025 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
20026 - Remove the undocumented "--digests" command-line option. It
20027 complicated our build process, caused subtle build issues on
20028 multiple platforms, and is now redundant since we started
20029 including git version identifiers. Closes ticket 14742.
20030 - Tor no longer contains checks for ancient directory cache versions
20031 that didn't know about microdescriptors.
20032 - Tor no longer contains workarounds for stat files generated by
20033 super-old versions of Tor that didn't choose guards sensibly.
20036 Changes in version 0.2.4.27 - 2015-04-06
20037 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
20038 could be used by an attacker to crash hidden services, or crash clients
20039 visiting hidden services. Hidden services should upgrade as soon as
20040 possible; clients should upgrade whenever packages become available.
20042 This release also backports a simple improvement to make hidden
20043 services a bit less vulnerable to denial-of-service attacks.
20045 o Major bugfixes (security, hidden service):
20046 - Fix an issue that would allow a malicious client to trigger an
20047 assertion failure and halt a hidden service. Fixes bug 15600;
20048 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20049 - Fix a bug that could cause a client to crash with an assertion
20050 failure when parsing a malformed hidden service descriptor. Fixes
20051 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20053 o Minor features (DoS-resistance, hidden service):
20054 - Introduction points no longer allow multiple INTRODUCE1 cells to
20055 arrive on the same circuit. This should make it more expensive for
20056 attackers to overwhelm hidden services with introductions.
20057 Resolves ticket 15515.
20060 Changes in version 0.2.5.12 - 2015-04-06
20061 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
20062 could be used by an attacker to crash hidden services, or crash clients
20063 visiting hidden services. Hidden services should upgrade as soon as
20064 possible; clients should upgrade whenever packages become available.
20066 This release also backports a simple improvement to make hidden
20067 services a bit less vulnerable to denial-of-service attacks.
20069 o Major bugfixes (security, hidden service):
20070 - Fix an issue that would allow a malicious client to trigger an
20071 assertion failure and halt a hidden service. Fixes bug 15600;
20072 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20073 - Fix a bug that could cause a client to crash with an assertion
20074 failure when parsing a malformed hidden service descriptor. Fixes
20075 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20077 o Minor features (DoS-resistance, hidden service):
20078 - Introduction points no longer allow multiple INTRODUCE1 cells to
20079 arrive on the same circuit. This should make it more expensive for
20080 attackers to overwhelm hidden services with introductions.
20081 Resolves ticket 15515.
20084 Changes in version 0.2.6.7 - 2015-04-06
20085 Tor 0.2.6.7 fixes two security issues that could be used by an
20086 attacker to crash hidden services, or crash clients visiting hidden
20087 services. Hidden services should upgrade as soon as possible; clients
20088 should upgrade whenever packages become available.
20090 This release also contains two simple improvements to make hidden
20091 services a bit less vulnerable to denial-of-service attacks.
20093 o Major bugfixes (security, hidden service):
20094 - Fix an issue that would allow a malicious client to trigger an
20095 assertion failure and halt a hidden service. Fixes bug 15600;
20096 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
20097 - Fix a bug that could cause a client to crash with an assertion
20098 failure when parsing a malformed hidden service descriptor. Fixes
20099 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
20101 o Minor features (DoS-resistance, hidden service):
20102 - Introduction points no longer allow multiple INTRODUCE1 cells to
20103 arrive on the same circuit. This should make it more expensive for
20104 attackers to overwhelm hidden services with introductions.
20105 Resolves ticket 15515.
20106 - Decrease the amount of reattempts that a hidden service performs
20107 when its rendezvous circuits fail. This reduces the computational
20108 cost for running a hidden service under heavy load. Resolves
20112 Changes in version 0.2.6.6 - 2015-03-24
20113 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
20115 It adds numerous safety, security, correctness, and performance
20116 improvements. Client programs can be configured to use more kinds of
20117 sockets, AutomapHosts works better, the multithreading backend is
20118 improved, cell transmission is refactored, test coverage is much
20119 higher, more denial-of-service attacks are handled, guard selection is
20120 improved to handle long-term guards better, pluggable transports
20121 should work a bit better, and some annoying hidden service performance
20122 bugs should be addressed.
20124 o Minor bugfixes (portability):
20125 - Use the correct datatype in the SipHash-2-4 function to prevent
20126 compilers from assuming any sort of alignment. Fixes bug 15436;
20127 bugfix on 0.2.5.3-alpha.
20129 Changes in version 0.2.6.5-rc - 2015-03-18
20130 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
20131 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
20133 o Major bugfixes (client):
20134 - Avoid crashing when making certain configuration option changes on
20135 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
20138 o Major bugfixes (pluggable transports):
20139 - Initialize the extended OR Port authentication cookie before
20140 launching pluggable transports. This prevents a race condition
20141 that occurred when server-side pluggable transports would cache the
20142 authentication cookie before it has been (re)generated. Fixes bug
20143 15240; bugfix on 0.2.5.1-alpha.
20145 o Major bugfixes (portability):
20146 - Do not crash on startup when running on Solaris. Fixes a bug
20147 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
20150 o Minor features (heartbeat):
20151 - On relays, report how many connections we negotiated using each
20152 version of the Tor link protocols. This information will let us
20153 know if removing support for very old versions of the Tor
20154 protocols is harming the network. Closes ticket 15212.
20156 o Code simplification and refactoring:
20157 - Refactor main loop to extract the 'loop' part. This makes it
20158 easier to run Tor under Shadow. Closes ticket 15176.
20161 Changes in version 0.2.5.11 - 2015-03-17
20162 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
20164 It backports several bugfixes from the 0.2.6 branch, including a
20165 couple of medium-level security fixes for relays and exit nodes.
20166 It also updates the list of directory authorities.
20168 o Directory authority changes:
20169 - Remove turtles as a directory authority.
20170 - Add longclaw as a new (v3) directory authority. This implements
20171 ticket 13296. This keeps the directory authority count at 9.
20172 - The directory authority Faravahar has a new IP address. This
20173 closes ticket 14487.
20175 o Major bugfixes (crash, OSX, security):
20176 - Fix a remote denial-of-service opportunity caused by a bug in
20177 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20180 o Major bugfixes (relay, stability, possible security):
20181 - Fix a bug that could lead to a relay crashing with an assertion
20182 failure if a buffer of exactly the wrong layout was passed to
20183 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20184 0.2.0.10-alpha. Patch from 'cypherpunks'.
20185 - Do not assert if the 'data' pointer on a buffer is advanced to the
20186 very end of the buffer; log a BUG message instead. Only assert if
20187 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20189 o Major bugfixes (exit node stability):
20190 - Fix an assertion failure that could occur under high DNS load.
20191 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20192 diagnosed and fixed by "cypherpunks".
20194 o Major bugfixes (Linux seccomp2 sandbox):
20195 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20196 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20197 0.2.5.1-alpha. Patch from "sanic".
20199 o Minor features (controller):
20200 - New "GETINFO bw-event-cache" to get information about recent
20201 bandwidth events. Closes ticket 14128. Useful for controllers to
20202 get recent bandwidth history after the fix for ticket 13988.
20204 o Minor features (geoip):
20205 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20206 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20209 o Minor bugfixes (client, automapping):
20210 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20211 no value follows the option. Fixes bug 14142; bugfix on
20212 0.2.4.7-alpha. Patch by "teor".
20213 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20214 14195; bugfix on 0.1.0.1-rc.
20216 o Minor bugfixes (compilation):
20217 - Build without warnings with the stock OpenSSL srtp.h header, which
20218 has a duplicate declaration of SSL_get_selected_srtp_profile().
20219 Fixes bug 14220; this is OpenSSL's bug, not ours.
20221 o Minor bugfixes (directory authority):
20222 - Allow directory authorities to fetch more data from one another if
20223 they find themselves missing lots of votes. Previously, they had
20224 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20225 bugfix on 0.1.2.5-alpha.
20226 - Enlarge the buffer to read bwauth generated files to avoid an
20227 issue when parsing the file in dirserv_read_measured_bandwidths().
20228 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20230 o Minor bugfixes (statistics):
20231 - Increase period over which bandwidth observations are aggregated
20232 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20234 o Minor bugfixes (preventative security, C safety):
20235 - When reading a hexadecimal, base-32, or base-64 encoded value from
20236 a string, always overwrite the whole output buffer. This prevents
20237 some bugs where we would look at (but fortunately, not reveal)
20238 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20242 Changes in version 0.2.4.26 - 2015-03-17
20243 Tor 0.2.4.26 includes an updated list of directory authorities. It
20244 also backports a couple of stability and security bugfixes from 0.2.5
20247 o Directory authority changes:
20248 - Remove turtles as a directory authority.
20249 - Add longclaw as a new (v3) directory authority. This implements
20250 ticket 13296. This keeps the directory authority count at 9.
20251 - The directory authority Faravahar has a new IP address. This
20252 closes ticket 14487.
20254 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
20255 - Fix an assertion failure that could occur under high DNS load.
20256 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20257 diagnosed and fixed by "cypherpunks".
20259 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
20260 - Fix a bug that could lead to a relay crashing with an assertion
20261 failure if a buffer of exactly the wrong layout was passed to
20262 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20263 0.2.0.10-alpha. Patch from 'cypherpunks'.
20264 - Do not assert if the 'data' pointer on a buffer is advanced to the
20265 very end of the buffer; log a BUG message instead. Only assert if
20266 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20268 o Minor features (geoip):
20269 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20270 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20273 Changes in version 0.2.6.4-rc - 2015-03-09
20274 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
20275 attacker might be able to use in order to crash certain Tor
20276 directories. It also resolves some minor issues left over from, or
20277 introduced in, Tor 0.2.6.3-alpha or earlier.
20279 o Major bugfixes (crash, OSX, security):
20280 - Fix a remote denial-of-service opportunity caused by a bug in
20281 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
20284 o Major bugfixes (relay, stability, possible security):
20285 - Fix a bug that could lead to a relay crashing with an assertion
20286 failure if a buffer of exactly the wrong layout is passed to
20287 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
20288 0.2.0.10-alpha. Patch from "cypherpunks".
20289 - Do not assert if the 'data' pointer on a buffer is advanced to the
20290 very end of the buffer; log a BUG message instead. Only assert if
20291 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
20293 o Major bugfixes (FreeBSD IPFW transparent proxy):
20294 - Fix address detection with FreeBSD transparent proxies, when
20295 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
20298 o Major bugfixes (Linux seccomp2 sandbox):
20299 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
20300 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
20302 - Allow AF_UNIX hidden services to be used with the seccomp2
20303 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
20304 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
20305 crash during attempts to call wait4. Fixes bug 15088; bugfix on
20306 0.2.5.1-alpha. Patch from "sanic".
20308 o Minor features (controller):
20309 - Messages about problems in the bootstrap process now include
20310 information about the server we were trying to connect to when we
20311 noticed the problem. Closes ticket 15006.
20313 o Minor features (geoip):
20314 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
20315 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
20318 o Minor features (logs):
20319 - Quiet some log messages in the heartbeat and at startup. Closes
20322 o Minor bugfixes (certificate handling):
20323 - If an authority operator accidentally makes a signing certificate
20324 with a future publication time, do not discard its real signing
20325 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
20326 - Remove any old authority certificates that have been superseded
20327 for at least two days. Previously, we would keep superseded
20328 certificates until they expired, if they were published close in
20329 time to the certificate that superseded them. Fixes bug 11454;
20330 bugfix on 0.2.1.8-alpha.
20332 o Minor bugfixes (compilation):
20333 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
20335 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
20338 o Minor bugfixes (testing):
20339 - Fix endianness issues in unit test for resolve_my_address() to
20340 have it pass on big endian systems. Fixes bug 14980; bugfix on
20342 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
20343 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
20344 - When running the new 'make test-stem' target, use the configured
20345 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
20346 from "cypherpunks".
20347 - When running the zero-length-keys tests, do not use the default
20348 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
20351 o Directory authority IP change:
20352 - The directory authority Faravahar has a new IP address. This
20353 closes ticket 14487.
20356 - Remove some lingering dead code that once supported mempools.
20357 Mempools were disabled by default in 0.2.5, and removed entirely
20358 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
20362 Changes in version 0.2.6.3-alpha - 2015-02-19
20363 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
20364 the 0.2.6.x series. It introduces support for more kinds of sockets,
20365 makes it harder to accidentally run an exit, improves our
20366 multithreading backend, incorporates several fixes for the
20367 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
20369 If no major regressions or security holes are found in this version,
20370 the next version will be a release candidate.
20372 o Deprecated versions:
20373 - Tor relays older than 0.2.4.18-rc are no longer allowed to
20374 advertise themselves on the network. Closes ticket 13555.
20376 o Major features (security, unix domain sockets):
20377 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
20378 applications can reach Tor without having to create AF_INET or
20379 AF_INET6 sockets, meaning they can completely disable their
20380 ability to make non-Tor network connections. To create a socket of
20381 this type, use "SocksPort unix:/path/to/socket". Implements
20383 - Support mapping hidden service virtual ports to AF_UNIX sockets.
20384 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
20385 Implements ticket 11485.
20387 o Major features (changed defaults):
20388 - Prevent relay operators from unintentionally running exits: When a
20389 relay is configured as an exit node, we now warn the user unless
20390 the "ExitRelay" option is set to 1. We warn even more loudly if
20391 the relay is configured with the default exit policy, since this
20392 can indicate accidental misconfiguration. Setting "ExitRelay 0"
20393 stops Tor from running as an exit relay. Closes ticket 10067.
20395 o Major features (directory system):
20396 - When downloading server- or microdescriptors from a directory
20397 server, we no longer launch multiple simultaneous requests to the
20398 same server. This reduces load on the directory servers,
20399 especially when directory guards are in use. Closes ticket 9969.
20400 - When downloading server- or microdescriptors over a tunneled
20401 connection, do not limit the length of our requests to what the
20402 Squid proxy is willing to handle. Part of ticket 9969.
20403 - Authorities can now vote on the correct digests and latest
20404 versions for different software packages. This allows packages
20405 that include Tor to use the Tor authority system as a way to get
20406 notified of updates and their correct digests. Implements proposal
20407 227. Closes ticket 10395.
20409 o Major features (guards):
20410 - Introduce the Guardfraction feature to improves load balancing on
20411 guard nodes. Specifically, it aims to reduce the traffic gap that
20412 guard nodes experience when they first get the Guard flag. This is
20413 a required step if we want to increase the guard lifetime to 9
20414 months or greater. Closes ticket 9321.
20416 o Major features (performance):
20417 - Make the CPU worker implementation more efficient by avoiding the
20418 kernel and lengthening pipelines. The original implementation used
20419 sockets to transfer data from the main thread to the workers, and
20420 didn't allow any thread to be assigned more than a single piece of
20421 work at once. The new implementation avoids communications
20422 overhead by making requests in shared memory, avoiding kernel IO
20423 where possible, and keeping more requests in flight at once.
20424 Implements ticket 9682.
20426 o Major features (relay):
20427 - Raise the minimum acceptable configured bandwidth rate for bridges
20428 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
20429 20 KiB/sec.) Closes ticket 13822.
20431 o Major bugfixes (exit node stability):
20432 - Fix an assertion failure that could occur under high DNS load.
20433 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
20434 diagnosed and fixed by "cypherpunks".
20436 o Major bugfixes (mixed relay-client operation):
20437 - When running as a relay and client at the same time (not
20438 recommended), if we decide not to use a new guard because we want
20439 to retry older guards, only close the locally-originating circuits
20440 passing through that guard. Previously we would close all the
20441 circuits through that guard. Fixes bug 9819; bugfix on
20442 0.2.1.1-alpha. Reported by "skruffy".
20444 o Minor features (build):
20445 - New --disable-system-torrc compile-time option to prevent Tor from
20446 looking for the system-wide torrc or torrc-defaults files.
20447 Resolves ticket 13037.
20449 o Minor features (controller):
20450 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
20451 events so controllers can observe circuit isolation inputs. Closes
20453 - ControlPort now supports the unix:/path/to/socket syntax as an
20454 alternative to the ControlSocket option, for consistency with
20455 SocksPort and HiddenServicePort. Closes ticket 14451.
20456 - New "GETINFO bw-event-cache" to get information about recent
20457 bandwidth events. Closes ticket 14128. Useful for controllers to
20458 get recent bandwidth history after the fix for ticket 13988.
20460 o Minor features (Denial of service resistance):
20461 - Count the total number of bytes used storing hidden service
20462 descriptors against the value of MaxMemInQueues. If we're low on
20463 memory, and more than 20% of our memory is used holding hidden
20464 service descriptors, free them until no more than 10% of our
20465 memory holds hidden service descriptors. Free the least recently
20466 fetched descriptors first. Resolves ticket 13806.
20467 - When we have recently been under memory pressure (over 3/4 of
20468 MaxMemInQueues is allocated), then allocate smaller zlib objects
20469 for small requests. Closes ticket 11791.
20471 o Minor features (geoip):
20472 - Update geoip and geoip6 files to the January 7 2015 Maxmind
20473 GeoLite2 Country database.
20475 o Minor features (guard nodes):
20476 - Reduce the time delay before saving guard status to disk from 10
20477 minutes to 30 seconds (or from one hour to 10 minutes if
20478 AvoidDiskWrites is set). Closes ticket 12485.
20480 o Minor features (hidden service):
20481 - Make Sybil attacks against hidden services harder by changing the
20482 minimum time required to get the HSDir flag from 25 hours up to 96
20483 hours. Addresses ticket 14149.
20484 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
20485 services to disable the anti-scanning feature introduced in
20486 0.2.6.2-alpha. With this option not set, a connection to an
20487 unlisted port closes the circuit. With this option set, only a
20488 RELAY_DONE cell is sent. Closes ticket 14084.
20490 o Minor features (interface):
20491 - Implement "-f -" command-line option to read torrc configuration
20492 from standard input, if you don't want to store the torrc file in
20493 the file system. Implements feature 13865.
20495 o Minor features (logging):
20496 - Add a count of unique clients to the bridge heartbeat message.
20497 Resolves ticket 6852.
20498 - Suppress "router info incompatible with extra info" message when
20499 reading extrainfo documents from cache. (This message got loud
20500 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
20502 - Elevate hidden service authorized-client message from DEBUG to
20503 INFO. Closes ticket 14015.
20505 o Minor features (stability):
20506 - Add assertions in our hash-table iteration code to check for
20507 corrupted values that could cause infinite loops. Closes
20510 o Minor features (systemd):
20511 - Various improvements and modernizations in systemd hardening
20512 support. Closes ticket 13805. Patch from Craig Andrews.
20514 o Minor features (testing networks):
20515 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
20516 and the default on a testing network to 2 minutes. Drop the
20517 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
20518 keep the default on a testing network at 30 seconds. This reduces
20519 HS bootstrap time to around 25 seconds. Also, change the default
20520 time in test-network.sh to match. Closes ticket 13401. Patch
20522 - Create TestingDirAuthVoteHSDir to correspond to
20523 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
20524 HSDir flag for the listed relays regardless of uptime or ORPort
20525 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
20526 Partial implementation for ticket 14067. Patch by "teor".
20528 o Minor features (tor2web mode):
20529 - Introduce the config option Tor2webRendezvousPoints, which allows
20530 clients in Tor2webMode to select a specific Rendezvous Point to be
20531 used in HS circuits. This might allow better performance for
20532 Tor2Web nodes. Implements ticket 12844.
20534 o Minor bugfixes (client DNS):
20535 - Report the correct cached DNS expiration times on SOCKS port or in
20536 DNS replies. Previously, we would report everything as "never
20537 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
20538 - Avoid a small memory leak when we find a cached answer for a
20539 reverse DNS lookup in a client-side DNS cache. (Remember, client-
20540 side DNS caching is off by default, and is not recommended.) Fixes
20541 bug 14259; bugfix on 0.2.0.1-alpha.
20543 o Minor bugfixes (client, automapping):
20544 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
20545 no value follows the option. Fixes bug 14142; bugfix on
20546 0.2.4.7-alpha. Patch by "teor".
20547 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
20548 14195; bugfix on 0.1.0.1-rc.
20549 - Prevent changes to other options from removing the wildcard value
20550 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
20552 - Allow MapAddress and AutomapHostsOnResolve to work together when
20553 an address is mapped into another address type (like .onion) that
20554 must be automapped at resolve time. Fixes bug 7555; bugfix
20557 o Minor bugfixes (client, bridges):
20558 - When we are using bridges and we had a network connectivity
20559 problem, only retry connecting to our currently configured
20560 bridges, not all bridges we know about and remember using. Fixes
20561 bug 14216; bugfix on 0.2.2.17-alpha.
20563 o Minor bugfixes (client, IPv6):
20564 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
20565 flag is not set; and not because the NoIPv4Traffic flag was set.
20566 Previously we'd looked at the NoIPv4Traffic flag for both types of
20567 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
20569 o Minor bugfixes (compilation):
20570 - The address of an array in the middle of a structure will always
20571 be non-NULL. clang recognises this and complains. Disable the
20572 tautologous and redundant check to silence this warning. Fixes bug
20573 14001; bugfix on 0.2.1.2-alpha.
20574 - Avoid warnings when building with systemd 209 or later. Fixes bug
20575 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
20576 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
20577 Addresses ticket 14188.
20578 - Build without warnings with the stock OpenSSL srtp.h header, which
20579 has a duplicate declaration of SSL_get_selected_srtp_profile().
20580 Fixes bug 14220; this is OpenSSL's bug, not ours.
20581 - Do not compile any code related to Tor2Web mode when Tor2Web mode
20582 is not enabled at compile time. Previously, this code was included
20583 in a disabled state. See discussion on ticket 12844.
20584 - Remove the --disable-threads configure option again. It was
20585 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
20586 14819; bugfix on 0.2.6.2-alpha.
20588 o Minor bugfixes (controller):
20589 - Report "down" in response to the "GETINFO entry-guards" command
20590 when relays are down with an unreachable_since value. Previously,
20591 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
20592 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
20593 14116; bugfix on 0.2.2.9-alpha.
20594 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
20595 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
20597 o Minor bugfixes (directory authority):
20598 - Allow directory authorities to fetch more data from one another if
20599 they find themselves missing lots of votes. Previously, they had
20600 been bumping against the 10 MB queued data limit. Fixes bug 14261;
20601 bugfix on 0.1.2.5-alpha.
20602 - Do not attempt to download extrainfo documents which we will be
20603 unable to validate with a matching server descriptor. Fixes bug
20604 13762; bugfix on 0.2.0.1-alpha.
20605 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
20606 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
20607 - Enlarge the buffer to read bwauth generated files to avoid an
20608 issue when parsing the file in dirserv_read_measured_bandwidths().
20609 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
20611 o Minor bugfixes (file handling):
20612 - Stop failing when key files are zero-length. Instead, generate new
20613 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
20614 on all versions of Tor. Patch by "teor".
20615 - Stop generating a fresh .old RSA onion key file when the .old file
20616 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
20617 - Avoid overwriting .old key files with empty key files.
20618 - Skip loading zero-length extrainfo store, router store, stats,
20619 state, and key files.
20620 - Avoid crashing when trying to reload a torrc specified as a
20621 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
20624 o Minor bugfixes (hidden services):
20625 - Close the introduction circuit when we have no more usable intro
20626 points, instead of waiting for it to time out. This also ensures
20627 that no follow-up HS descriptor fetch is triggered when the
20628 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
20629 - When fetching a hidden service descriptor for a down service that
20630 was recently up, do not keep refetching until we try the same
20631 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
20632 - Successfully launch Tor with a nonexistent hidden service
20633 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
20634 14106; bugfix on 0.2.6.2-alpha.
20636 o Minor bugfixes (logging):
20637 - Avoid crashing when there are more log domains than entries in
20638 domain_list. Bugfix on 0.2.3.1-alpha.
20639 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
20641 - Don't log messages to stdout twice when starting up. Fixes bug
20642 13993; bugfix on 0.2.6.1-alpha.
20644 o Minor bugfixes (parsing):
20645 - Stop accepting milliseconds (or other junk) at the end of
20646 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
20647 - Support two-number and three-number version numbers correctly, in
20648 case we change the Tor versioning system in the future. Fixes bug
20649 13661; bugfix on 0.0.8pre1.
20651 o Minor bugfixes (path counting):
20652 - When deciding whether the consensus lists any exit nodes, count
20653 the number listed in the consensus, not the number we have
20654 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
20655 - When deciding whether we have any exit nodes, only examine
20656 ExitNodes when the ExitNodes option is actually set. Fixes part of
20657 bug 14918; bugfix on 0.2.6.2-alpha.
20658 - Get rid of redundant and possibly scary warnings that we are
20659 missing directory information while we bootstrap. Fixes part of
20660 bug 14918; bugfix on 0.2.6.2-alpha.
20662 o Minor bugfixes (portability):
20663 - Fix the ioctl()-based network interface lookup code so that it
20664 will work on systems that have variable-length struct ifreq, for
20666 - Fix scheduler compilation on targets where char is unsigned. Fixes
20667 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
20669 o Minor bugfixes (sandbox):
20670 - Allow glibc fatal errors to be sent to stderr before Tor exits.
20671 Previously, glibc would try to write them to /dev/tty, and the
20672 sandbox would trap the call and make Tor exit prematurely. Fixes
20673 bug 14759; bugfix on 0.2.5.1-alpha.
20675 o Minor bugfixes (shutdown):
20676 - When shutting down, always call event_del() on lingering read or
20677 write events before freeing them. Otherwise, we risk double-frees
20678 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
20681 o Minor bugfixes (small memory leaks):
20682 - Avoid leaking memory when using IPv6 virtual address mappings.
20683 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
20686 o Minor bugfixes (statistics):
20687 - Increase period over which bandwidth observations are aggregated
20688 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
20690 o Minor bugfixes (systemd support):
20691 - Fix detection and operation of systemd watchdog. Fixes part of bug
20692 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
20693 - Run correctly under systemd with the RunAsDaemon option set. Fixes
20694 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
20695 - Inform the systemd supervisor about more changes in the Tor
20696 process status. Implements part of ticket 14141. Patch from
20698 - Cause the "--disable-systemd" option to actually disable systemd
20699 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
20702 o Minor bugfixes (TLS):
20703 - Check more thoroughly throughout the TLS code for possible
20704 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
20706 o Minor bugfixes (transparent proxy):
20707 - Use getsockname, not getsockopt, to retrieve the address for a
20708 TPROXY-redirected connection. Fixes bug 13796; bugfix
20711 o Code simplification and refactoring:
20712 - Move fields related to isolating and configuring client ports into
20713 a shared structure. Previously, they were duplicated across
20714 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
20715 to copy them correctly had been the cause of at least one bug in
20716 the past. Closes ticket 8546.
20717 - Refactor the get_interface_addresses_raw() doom-function into
20718 multiple smaller and simpler subfunctions. Cover the resulting
20719 subfunctions with unit-tests. Fixes a significant portion of
20721 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
20722 only for version <= 0.2.2.24 which is now deprecated. Closes
20724 - Remove a test for a long-defunct broken version-one
20728 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
20729 for writing the OpenBSD-specific tips. Resolves ticket 13702.
20730 - Make the tor-resolve documentation match its help string and its
20731 options. Resolves part of ticket 14325.
20732 - Log a more useful error message from tor-resolve when failing to
20733 look up a hidden service address. Resolves part of ticket 14325.
20735 o Downgraded warnings:
20736 - Don't warn when we've attempted to contact a relay using the wrong
20737 ntor onion key. Closes ticket 9635.
20739 o Removed features:
20740 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
20741 longer silently accepted as an alias for "ExitNodes".
20742 - The --enable-mempool and --enable-buf-freelists options, which
20743 were originally created to work around bad malloc implementations,
20744 no longer exist. They were off-by-default in 0.2.5. Closes
20748 - Make the checkdir/perms test complete successfully even if the
20749 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
20750 - Test that tor does not fail when key files are zero-length. Check
20751 that tor generates new keys, and overwrites the empty key files.
20752 - Test that tor generates new keys when keys are missing
20753 (existing behavior).
20754 - Test that tor does not overwrite key files that already contain
20755 data (existing behavior). Tests bug 13111. Patch by "teor".
20756 - New "make test-stem" target to run stem integration tests.
20757 Requires that the "STEM_SOURCE_DIR" environment variable be set.
20758 Closes ticket 14107.
20759 - Make the test_cmdline_args.py script work correctly on Windows.
20760 Patch from Gisle Vanem.
20761 - Move the slower unit tests into a new "./src/test/test-slow"
20762 binary that can be run independently of the other tests. Closes
20764 - Avoid undefined behavior when sampling huge values from the
20765 Laplace distribution. This made unittests fail on Raspberry Pi.
20766 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
20769 Changes in version 0.2.6.2-alpha - 2014-12-31
20770 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
20771 It introduces a major new backend for deciding when to send cells on
20772 channels, which should lead down the road to big performance
20773 increases. It contains security and statistics features for better
20774 work on hidden services, and numerous bugfixes.
20776 This release contains many new unit tests, along with major
20777 performance improvements for running testing networks using Chutney.
20778 Thanks to a series of patches contributed by "teor", testing networks
20779 should now bootstrap in seconds, rather than minutes.
20781 o Major features (relay, infrastructure):
20782 - Complete revision of the code that relays use to decide which cell
20783 to send next. Formerly, we selected the best circuit to write on
20784 each channel, but we didn't select among channels in any
20785 sophisticated way. Now, we choose the best circuits globally from
20786 among those whose channels are ready to deliver traffic.
20788 This patch implements a new inter-cmux comparison API, a global
20789 high/low watermark mechanism and a global scheduler loop for
20790 transmission prioritization across all channels as well as among
20791 circuits on one channel. This schedule is currently tuned to
20792 (tolerantly) avoid making changes in network performance, but it
20793 should form the basis for major circuit performance increases in
20794 the future. Code by Andrea; tuning by Rob Jansen; implements
20797 o Major features (hidden services):
20798 - Make HS port scanning more difficult by immediately closing the
20799 circuit when a user attempts to connect to a nonexistent port.
20800 Closes ticket 13667.
20801 - Add a HiddenServiceStatistics option that allows Tor relays to
20802 gather and publish statistics about the overall size and volume of
20803 hidden service usage. Specifically, when this option is turned on,
20804 an HSDir will publish an approximate number of hidden services
20805 that have published descriptors to it the past 24 hours. Also, if
20806 a relay has acted as a hidden service rendezvous point, it will
20807 publish the approximate amount of rendezvous cells it has relayed
20808 the past 24 hours. The statistics themselves are obfuscated so
20809 that the exact values cannot be derived. For more details see
20810 proposal 238, "Better hidden service stats from Tor relays". This
20811 feature is currently disabled by default. Implements feature 13192.
20813 o Major bugfixes (client, automap):
20814 - Repair automapping with IPv6 addresses. This automapping should
20815 have worked previously, but one piece of debugging code that we
20816 inserted to detect a regression actually caused the regression to
20817 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
20818 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
20821 o Major bugfixes (hidden services):
20822 - When closing an introduction circuit that was opened in parallel
20823 with others, don't mark the introduction point as unreachable.
20824 Previously, the first successful connection to an introduction
20825 point would make the other introduction points get marked as
20826 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
20828 o Directory authority changes:
20829 - Remove turtles as a directory authority.
20830 - Add longclaw as a new (v3) directory authority. This implements
20831 ticket 13296. This keeps the directory authority count at 9.
20833 o Major removed features:
20834 - Tor clients no longer support connecting to hidden services
20835 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
20836 option has been removed. (There shouldn't be any hidden services
20837 running these versions on the network.) Closes ticket 7803.
20839 o Minor features (client):
20840 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
20841 is enabled, reject requests with IP addresses as hostnames.
20842 Resolves ticket 13315.
20844 o Minor features (controller):
20845 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
20846 write an unscheduled heartbeat message to the log. Implements
20849 o Minor features (geoip):
20850 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
20853 o Minor features (hidden services):
20854 - When re-enabling the network, don't try to build introduction
20855 circuits until we have successfully built a circuit. This makes
20856 hidden services come up faster when the network is re-enabled.
20857 Patch from "akwizgran". Closes ticket 13447.
20858 - When we fail to retrieve a hidden service descriptor, send the
20859 controller an "HS_DESC FAILED" controller event. Implements
20861 - New HiddenServiceDirGroupReadable option to cause hidden service
20862 directories and hostname files to be created group-readable. Patch
20863 from "anon", David Stainton, and "meejah". Closes ticket 11291.
20865 o Minor features (systemd):
20866 - Where supported, when running with systemd, report successful
20867 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
20868 - When running with systemd, support systemd watchdog messages. Part
20869 of ticket 11016. Patch by Michael Scherer.
20871 o Minor features (transparent proxy):
20872 - Update the transparent proxy option checks to allow for both ipfw
20873 and pf on OS X. Closes ticket 14002.
20874 - Use the correct option when using IPv6 with transparent proxy
20875 support on Linux. Resolves 13808. Patch by Francisco Blas
20878 o Minor bugfixes (preventative security, C safety):
20879 - When reading a hexadecimal, base-32, or base-64 encoded value from
20880 a string, always overwrite the whole output buffer. This prevents
20881 some bugs where we would look at (but fortunately, not reveal)
20882 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
20884 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
20885 just the part that's used. This makes it harder for data leak bugs
20886 to occur in the event of other programming failures. Resolves
20889 o Minor bugfixes (client, microdescriptors):
20890 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
20891 computing which microdescriptors to download. This keeps us from
20892 erroneous download behavior if two microdescriptor digests ever
20893 have the same first 160 bits. Fixes part of bug 13399; bugfix
20895 - Reset a router's status if its microdescriptor digest changes,
20896 even if the first 160 bits remain the same. Fixes part of bug
20897 13399; bugfix on 0.2.3.1-alpha.
20899 o Minor bugfixes (compilation):
20900 - Silence clang warnings under --enable-expensive-hardening,
20901 including implicit truncation of 64 bit values to 32 bit, const
20902 char assignment to self, tautological compare, and additional
20903 parentheses around equality tests. Fixes bug 13577; bugfix
20905 - Fix a clang warning about checking whether an address in the
20906 middle of a structure is NULL. Fixes bug 14001; bugfix
20909 o Minor bugfixes (hidden services):
20910 - Correctly send a controller event when we find that a rendezvous
20911 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
20912 - Pre-check directory permissions for new hidden-services to avoid
20913 at least one case of "Bug: Acting on config options left us in a
20914 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
20915 - When adding a new hidden service (for example, via SETCONF), Tor
20916 no longer congratulates the user for running a relay. Fixes bug
20917 13941; bugfix on 0.2.6.1-alpha.
20918 - When fetching hidden service descriptors, we now check not only
20919 for whether we got the hidden service we had in mind, but also
20920 whether we got the particular descriptors we wanted. This prevents
20921 a class of inefficient but annoying DoS attacks by hidden service
20922 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
20925 o Minor bugfixes (Linux seccomp2 sandbox):
20926 - Make transparent proxy support work along with the seccomp2
20927 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
20928 by Francisco Blas Izquierdo Riera.
20929 - Fix a memory leak in tor-resolve when running with the sandbox
20930 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
20932 o Minor bugfixes (logging):
20933 - Downgrade warnings about RSA signature failures to info log level.
20934 Emit a warning when an extra info document is found incompatible
20935 with a corresponding router descriptor. Fixes bug 9812; bugfix
20937 - Make connection_ap_handshake_attach_circuit() log the circuit ID
20938 correctly. Fixes bug 13701; bugfix on 0.0.6.
20940 o Minor bugfixes (misc):
20941 - Stop allowing invalid address patterns like "*/24" that contain
20942 both a wildcard address and a bit prefix length. This affects all
20943 our address-range parsing code. Fixes bug 7484; bugfix
20946 o Minor bugfixes (testing networks, fast startup):
20947 - Allow Tor to build circuits using a consensus with no exits. If
20948 the consensus has no exits (typical of a bootstrapping test
20949 network), allow Tor to build circuits once enough descriptors have
20950 been downloaded. This assists in bootstrapping a testing Tor
20951 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
20953 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
20954 header to directory servers. This allows us to obtain consensuses
20955 promptly when the consensus interval is very short. This assists
20956 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
20957 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
20958 - Stop assuming that private addresses are local when checking
20959 reachability in a TestingTorNetwork. Instead, when testing, assume
20960 all OR connections are remote. (This is necessary due to many test
20961 scenarios running all relays on localhost.) This assists in
20962 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
20963 0.1.0.1-rc. Patch by "teor".
20964 - Avoid building exit circuits from a consensus with no exits. Now
20965 thanks to our fix for 13718, we accept a no-exit network as not
20966 wholly lost, but we need to remember not to try to build exit
20967 circuits on it. Closes ticket 13814; patch by "teor".
20968 - Stop requiring exits to have non-zero bandwithcapacity in a
20969 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
20970 ignore exit bandwidthcapacity. This assists in bootstrapping a
20971 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
20972 on 0.2.0.3-alpha. Patch by "teor".
20973 - Add "internal" to some bootstrap statuses when no exits are
20974 available. If the consensus does not contain Exits, Tor will only
20975 build internal circuits. In this case, relevant statuses will
20976 contain the word "internal" as indicated in the Tor control-
20977 spec.txt. When bootstrap completes, Tor will be ready to build
20978 internal circuits. If a future consensus contains Exits, exit
20979 circuits may become available. Fixes part of bug 13718; bugfix on
20980 0.2.4.10-alpha. Patch by "teor".
20981 - Decrease minimum consensus interval to 10 seconds when
20982 TestingTorNetwork is set, or 5 seconds for the first consensus.
20983 Fix assumptions throughout the code that assume larger intervals.
20984 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
20986 - Avoid excluding guards from path building in minimal test
20987 networks, when we're in a test network and excluding guards would
20988 exclude all relays. This typically occurs in incredibly small tor
20989 networks, and those using "TestingAuthVoteGuard *". Fixes part of
20990 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
20992 o Code simplification and refactoring:
20993 - Stop using can_complete_circuits as a global variable; access it
20994 with a function instead.
20995 - Avoid using operators directly as macro arguments: this lets us
20996 apply coccinelle transformations to our codebase more directly.
20997 Closes ticket 13172.
20998 - Combine the functions used to parse ClientTransportPlugin and
20999 ServerTransportPlugin into a single function. Closes ticket 6456.
21000 - Add inline functions and convenience macros for inspecting channel
21001 state. Refactor the code to use convenience macros instead of
21002 checking channel state directly. Fixes issue 7356.
21003 - Document all members of was_router_added_t and rename
21004 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
21005 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
21006 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
21007 constant instead of hardcoded value. Fixes issue 13840.
21008 - Refactor our generic strmap and digestmap types into a single
21009 implementation, so that we can add a new digest256map
21013 - Document the bridge-authority-only 'networkstatus-bridges' file.
21014 Closes ticket 13713; patch from "tom".
21015 - Fix typo in PredictedPortsRelevanceTime option description in
21016 manpage. Resolves issue 13707.
21017 - Stop suggesting that users specify relays by nickname: it isn't a
21018 good idea. Also, properly cross-reference how to specify relays in
21019 all parts of manual documenting options that take a list of
21020 relays. Closes ticket 13381.
21021 - Clarify the HiddenServiceDir option description in manpage to make
21022 it clear that relative paths are taken with respect to the current
21023 working directory. Also clarify that this behavior is not
21024 guaranteed to remain indefinitely. Fixes issue 13913.
21027 - New tests for many parts of channel, relay, and circuitmux
21028 functionality. Code by Andrea; part of 9262.
21029 - New tests for parse_transport_line(). Part of ticket 6456.
21030 - In the unit tests, use chgrp() to change the group of the unit
21031 test temporary directory to the current user, so that the sticky
21032 bit doesn't interfere with tests that check directory groups.
21034 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
21038 Changes in version 0.2.6.1-alpha - 2014-10-30
21039 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
21040 includes numerous code cleanups and new tests, and fixes a large
21041 number of annoying bugs. Out-of-memory conditions are handled better
21042 than in 0.2.5, pluggable transports have improved proxy support, and
21043 clients now use optimistic data for contacting hidden services. Also,
21044 we are now more robust to changes in what we consider a parseable
21045 directory object, so that tightening restrictions does not have a risk
21046 of introducing infinite download loops.
21048 This is the first alpha release in a new series, so expect there to be
21049 bugs. Users who would rather test out a more stable branch should stay
21050 with 0.2.5.x for now.
21052 o New compiler and system requirements:
21053 - Tor 0.2.6.x requires that your compiler support more of the C99
21054 language standard than before. The 'configure' script now detects
21055 whether your compiler supports C99 mid-block declarations and
21056 designated initializers. If it does not, Tor will not compile.
21058 We may revisit this requirement if it turns out that a significant
21059 number of people need to build Tor with compilers that don't
21060 bother implementing a 15-year-old standard. Closes ticket 13233.
21061 - Tor no longer supports systems without threading support. When we
21062 began working on Tor, there were several systems that didn't have
21063 threads, or where the thread support wasn't able to run the
21064 threads of a single process on multiple CPUs. That no longer
21065 holds: every system where Tor needs to run well now has threading
21066 support. Resolves ticket 12439.
21068 o Removed platform support:
21069 - We no longer include special code to build on Windows CE; as far
21070 as we know, nobody has used Tor on Windows CE in a very long time.
21071 Closes ticket 11446.
21073 o Major features (bridges):
21074 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
21075 transports if they are configured via the "TOR_PT_PROXY"
21076 environment variable. Implements proposal 232. Resolves
21079 o Major features (client performance, hidden services):
21080 - Allow clients to use optimistic data when connecting to a hidden
21081 service, which should remove a round-trip from hidden service
21082 initialization. See proposal 181 for details. Implements
21085 o Major features (directory system):
21086 - Upon receiving an unparseable directory object, if its digest
21087 matches what we expected, then don't try to download it again.
21088 Previously, when we got a descriptor we didn't like, we would keep
21089 trying to download it over and over. Closes ticket 11243.
21091 o Major features (sample torrc):
21092 - Add a new, infrequently-changed "torrc.minimal". This file is
21093 similar to torrc.sample, but it will change as infrequently as
21094 possible, for the benefit of users whose systems prompt them for
21095 intervention whenever a default configuration file is changed.
21096 Making this change allows us to update torrc.sample to be a more
21097 generally useful "sample torrc".
21099 o Major bugfixes (directory authorities):
21100 - Do not assign the HSDir flag to relays if they are not Valid, or
21101 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
21103 o Major bugfixes (directory bandwidth performance):
21104 - Don't flush the zlib buffer aggressively when compressing
21105 directory information for clients. This should save about 7% of
21106 the bandwidth currently used for compressed descriptors and
21107 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
21109 o Minor features (security, memory wiping):
21110 - Ensure we securely wipe keys from memory after
21111 crypto_digest_get_digest and init_curve25519_keypair_from_file
21112 have finished using them. Resolves ticket 13477.
21114 o Minor features (security, out-of-memory handling):
21115 - When handling an out-of-memory condition, allocate less memory for
21116 temporary data structures. Fixes issue 10115.
21117 - When handling an out-of-memory condition, consider more types of
21118 buffers, including those on directory connections, and zlib
21119 buffers. Resolves ticket 11792.
21122 - When identity keypair is generated for first time, log a
21123 congratulatory message that links to the new relay lifecycle
21124 document. Implements feature 10427.
21126 o Minor features (client):
21127 - Clients are now willing to send optimistic data (before they
21128 receive a 'connected' cell) to relays of any version. (Relays
21129 without support for optimistic data are no longer supported on the
21130 Tor network.) Resolves ticket 13153.
21132 o Minor features (directory authorities):
21133 - Don't list relays with a bandwidth estimate of 0 in the consensus.
21134 Implements a feature proposed during discussion of bug 13000.
21135 - In tor-gencert, report an error if the user provides the same
21136 argument more than once.
21137 - If a directory authority can't find a best consensus method in the
21138 votes that it holds, it now falls back to its favorite consensus
21139 method. Previously, it fell back to method 1. Neither of these is
21140 likely to get enough signatures, but "fall back to favorite"
21141 doesn't require us to maintain support an obsolete consensus
21142 method. Implements part of proposal 215.
21144 o Minor features (logging):
21145 - On Unix-like systems, you can now use named pipes as the target of
21146 the Log option, and other options that try to append to files.
21147 Closes ticket 12061. Patch from "carlo von lynX".
21148 - When opening a log file at startup, send it every log message that
21149 we generated between startup and opening it. Previously, log
21150 messages that were generated before opening the log file were only
21151 logged to stdout. Closes ticket 6938.
21152 - Add a TruncateLogFile option to overwrite logs instead of
21153 appending to them. Closes ticket 5583.
21155 o Minor features (portability, Solaris):
21156 - Threads are no longer disabled by default on Solaris; we believe
21157 that the versions of Solaris with broken threading support are all
21158 obsolete by now. Resolves ticket 9495.
21160 o Minor features (relay):
21161 - Re-check our address after we detect a changed IP address from
21162 getsockname(). This ensures that the controller command "GETINFO
21163 address" will report the correct value. Resolves ticket 11582.
21165 - A new AccountingRule option lets Relays set whether they'd like
21166 AccountingMax to be applied separately to inbound and outbound
21167 traffic, or applied to the sum of inbound and outbound traffic.
21168 Resolves ticket 961. Patch by "chobe".
21170 o Minor features (testing networks):
21171 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
21172 the "Exit" flag regardless of their uptime, bandwidth, or exit
21173 policy. TestingTorNetwork must be set for this option to have any
21174 effect. Previously, authorities would take up to 35 minutes to
21175 give nodes the Exit flag in a test network. Partially implements
21178 o Minor features (validation):
21179 - Check all date/time values passed to tor_timegm and
21180 parse_rfc1123_time for validity, taking leap years into account.
21181 Improves HTTP header validation. Implemented with bug 13476.
21182 - In correct_tm(), limit the range of values returned by system
21183 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
21184 This means we don't have to deal with negative or too large dates,
21185 even if a clock is wrong. Otherwise we might fail to read a file
21186 written by us which includes such a date. Fixes bug 13476.
21188 o Minor bugfixes (bridge clients):
21189 - When configured to use a bridge without an identity digest (not
21190 recommended), avoid launching an extra channel to it when
21191 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
21193 o Minor bugfixes (bridges):
21194 - When DisableNetwork is set, do not launch pluggable transport
21195 plugins, and if any are running, terminate them. Fixes bug 13213;
21196 bugfix on 0.2.3.6-alpha.
21198 o Minor bugfixes (C correctness):
21199 - Fix several instances of possible integer overflow/underflow/NaN.
21200 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
21202 - In circuit_build_times_calculate_timeout() in circuitstats.c,
21203 avoid dividing by zero in the pareto calculations. This traps
21204 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
21206 - Fix an integer overflow in format_time_interval(). Fixes bug
21207 13393; bugfix on 0.2.0.10-alpha.
21208 - Set the correct day of year value when the system's localtime(_r)
21209 or gmtime(_r) functions fail to set struct tm. Not externally
21210 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
21211 - Avoid unlikely signed integer overflow in tor_timegm on systems
21212 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
21214 o Minor bugfixes (client):
21215 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
21216 BadExit flag are not considered worthy candidates. Fixes bug
21217 13066; bugfix on 0.1.2.3-alpha.
21218 - Use the consensus schedule for downloading consensuses, and not
21219 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
21220 - Handle unsupported or malformed SOCKS5 requests properly by
21221 responding with the appropriate error message before closing the
21222 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
21224 o Minor bugfixes (client, torrc):
21225 - Stop modifying the value of our DirReqStatistics torrc option just
21226 because we're not a bridge or relay. This bug was causing Tor
21227 Browser users to write "DirReqStatistics 0" in their torrc files
21228 as if they had chosen to change the config. Fixes bug 4244; bugfix
21230 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
21231 that our options have changed every time we SIGHUP. Fixes bug
21232 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
21234 o Minor bugfixes (controller):
21235 - Return an error when the second or later arguments of the
21236 "setevents" controller command are invalid events. Previously we
21237 would return success while silently skipping invalid events. Fixes
21238 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
21240 o Minor bugfixes (directory system):
21241 - Always believe that v3 directory authorities serve extra-info
21242 documents, whether they advertise "caches-extra-info" or not.
21243 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21244 - When running as a v3 directory authority, advertise that you serve
21245 extra-info documents so that clients who want them can find them
21246 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
21247 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
21248 Previously, directories offering BRIDGE_DIRINFO and some other
21249 flag (i.e. microdescriptors or extrainfo) would be ignored when
21250 looking for bridges. Partially fixes bug 13163; bugfix
21253 o Minor bugfixes (networking):
21254 - Check for orconns and use connection_or_close_for_error() rather
21255 than connection_mark_for_close() directly in the getsockopt()
21256 failure case of connection_handle_write_impl(). Fixes bug 11302;
21257 bugfix on 0.2.4.4-alpha.
21259 o Minor bugfixes (relay):
21260 - When generating our family list, remove spaces from around the
21261 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
21262 - If our previous bandwidth estimate was 0 bytes, allow publishing a
21263 new relay descriptor immediately. Fixes bug 13000; bugfix
21266 o Minor bugfixes (testing networks):
21267 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
21268 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
21269 - Stop using the default authorities in networks which provide both
21270 AlternateDirAuthority and AlternateBridgeAuthority. Partially
21271 fixes bug 13163; bugfix on 0.2.0.13-alpha.
21273 o Minor bugfixes (testing):
21274 - Stop spawn test failures due to a race condition between the
21275 SIGCHLD handler updating the process status, and the test reading
21276 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
21278 o Minor bugfixes (testing, Windows):
21279 - Avoid passing an extra backslash when creating a temporary
21280 directory for running the unit tests on Windows. Fixes bug 12392;
21281 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
21283 o Minor bugfixes (windows):
21284 - Remove code to special-case handling of NTE_BAD_KEYSET when
21285 acquiring windows CryptoAPI context. This error can't actually
21286 occur for the parameters we're providing. Fixes bug 10816; bugfix
21289 o Minor bugfixes (zlib):
21290 - Avoid truncating a zlib stream when trying to finalize it with an
21291 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
21294 - Allow our configure script to build correctly with autoconf 2.62
21295 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
21296 - Improve the error message from ./configure to make it clear that
21297 when asciidoc has not been found, the user will have to either add
21298 --disable-asciidoc argument or install asciidoc. Resolves
21301 o Code simplification and refactoring:
21302 - Change the entry_is_live() function to take named bitfield
21303 elements instead of an unnamed list of booleans. Closes
21305 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
21306 Resolves ticket 12205.
21307 - Use calloc and reallocarray functions instead of multiply-
21308 then-malloc. This makes it less likely for us to fall victim to an
21309 integer overflow attack when allocating. Resolves ticket 12855.
21310 - Use the standard macro name SIZE_MAX, instead of our
21312 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
21313 functions which take them as arguments. Replace 0 with NO_DIRINFO
21314 in a function call for clarity. Seeks to prevent future issues
21316 - Avoid 4 null pointer errors under clang static analysis by using
21317 tor_assert() to prove that the pointers aren't null. Fixes
21319 - Rework the API of policies_parse_exit_policy() to use a bitmask to
21320 represent parsing options, instead of a confusing mess of
21321 booleans. Resolves ticket 8197.
21322 - Introduce a helper function to parse ExitPolicy in
21323 or_options_t structure.
21326 - Add a doc/TUNING document with tips for handling large numbers of
21327 TCP connections when running busy Tor relay. Update the warning
21328 message to point to this file when running out of sockets
21329 operating system is allowing to use simultaneously. Resolves
21332 o Removed features:
21333 - We no longer remind the user about configuration options that have
21334 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
21335 - Remove our old, non-weighted bandwidth-based node selection code.
21336 Previously, we used it as a fallback when we couldn't perform
21337 weighted bandwidth-based node selection. But that would only
21338 happen in the cases where we had no consensus, or when we had a
21339 consensus generated by buggy or ancient directory authorities. In
21340 either case, it's better to use the more modern, better maintained
21341 algorithm, with reasonable defaults for the weights. Closes
21343 - Remove the --disable-curve25519 configure option. Relays and
21344 clients now are required to support curve25519 and the
21346 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
21347 used to be deprecated synonyms for "StrictNodes", are now marked
21348 obsolete. Resolves ticket 12226.
21349 - Clients don't understand the BadDirectory flag in the consensus
21350 anymore, and ignore it.
21353 - Refactor the function that chooses guard nodes so that it can more
21354 easily be tested; write some tests for it.
21355 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
21356 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
21357 - Create unit tests for format_time_interval(). With bug 13393.
21358 - Add unit tests for tor_timegm signed overflow, tor_timegm and
21359 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
21360 tests (visible) fixes in bug 13476.
21361 - Add a "coverage-html" make target to generate HTML-visualized
21362 coverage results when building with --enable-coverage. (Requires
21363 lcov.) Patch from Kevin Murray.
21364 - Enable the backtrace handler (where supported) when running the
21366 - Revise all unit tests that used the legacy test_* macros to
21367 instead use the recommended tt_* macros. This patch was generated
21368 with coccinelle, to avoid manual errors. Closes ticket 13119.
21370 o Distribution (systemd):
21371 - systemd unit file: only allow tor to write to /var/lib/tor and
21372 /var/log/tor. The rest of the filesystem is accessible for reading
21373 only. Patch by intrigeri; resolves ticket 12751.
21374 - systemd unit file: ensure that the process and all its children
21375 can never gain new privileges. Patch by intrigeri; resolves
21377 - systemd unit file: set up /var/run/tor as writable for the Tor
21378 service. Patch by intrigeri; resolves ticket 13196.
21380 o Removed features (directory authorities):
21381 - Remove code that prevented authorities from listing Tor relays
21382 affected by CVE-2011-2769 as guards. These relays are already
21383 rejected altogether due to the minimum version requirement of
21384 0.2.3.16-alpha. Closes ticket 13152.
21385 - The "AuthDirRejectUnlisted" option no longer has any effect, as
21386 the fingerprints file (approved-routers) has been deprecated.
21387 - Directory authorities do not support being Naming dirauths anymore.
21388 The "NamingAuthoritativeDir" config option is now obsolete.
21389 - Directory authorities do not support giving out the BadDirectory
21391 - Directory authorities no longer advertise or support consensus
21392 methods 1 through 12 inclusive. These consensus methods were
21393 obsolete and/or insecure: maintaining the ability to support them
21394 served no good purpose. Implements part of proposal 215; closes
21397 o Testing (test-network.sh):
21398 - Stop using "echo -n", as some shells' built-in echo doesn't
21399 support "-n". Instead, use "/bin/echo -n". Partially fixes
21401 - Stop an apparent test-network hang when used with make -j2. Fixes
21403 - Add a --delay option to test-network.sh, which configures the
21404 delay before the chutney network tests for data transmission.
21405 Partially implements ticket 13161.
21408 Changes in version 0.2.5.10 - 2014-10-24
21409 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
21411 It adds several new security features, including improved
21412 denial-of-service resistance for relays, new compiler hardening
21413 options, and a system-call sandbox for hardened installations on Linux
21414 (requires seccomp2). The controller protocol has several new features,
21415 resolving IPv6 addresses should work better than before, and relays
21416 should be a little more CPU-efficient. We've added support for more
21417 OpenBSD and FreeBSD transparent proxy types. We've improved the build
21418 system and testing infrastructure to allow unit testing of more parts
21419 of the Tor codebase. Finally, we've addressed several nagging pluggable
21420 transport usability issues, and included numerous other small bugfixes
21421 and features mentioned below.
21423 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
21424 have accumulated many known flaws; everyone should upgrade.
21426 o Deprecated versions:
21427 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
21428 attention for some while.
21431 Changes in version 0.2.5.9-rc - 2014-10-20
21432 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
21433 series. It disables SSL3 in response to the recent "POODLE" attack
21434 (even though POODLE does not affect Tor). It also works around a crash
21435 bug caused by some operating systems' response to the "POODLE" attack
21436 (which does affect Tor). It also contains a few miscellaneous fixes.
21438 o Major security fixes:
21439 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21440 today support TLS 1.0 or later, so we can safely turn off support
21441 for this old (and insecure) protocol. Fixes bug 13426.
21443 o Major bugfixes (openssl bug workaround):
21444 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21445 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21446 13471. This is a workaround for an OpenSSL bug.
21449 - Disable the sandbox name resolver cache when running tor-resolve:
21450 tor-resolve doesn't use the sandbox code, and turning it on was
21451 breaking attempts to do tor-resolve on a non-default server on
21452 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
21454 o Compilation fixes:
21455 - Build and run correctly on systems like OpenBSD-current that have
21456 patched OpenSSL to remove get_cipher_by_char and/or its
21457 implementations. Fixes issue 13325.
21459 o Downgraded warnings:
21460 - Downgrade the severity of the 'unexpected sendme cell from client'
21461 from 'warn' to 'protocol warning'. Closes ticket 8093.
21464 Changes in version 0.2.4.25 - 2014-10-20
21465 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
21466 (even though POODLE does not affect Tor). It also works around a crash
21467 bug caused by some operating systems' response to the "POODLE" attack
21468 (which does affect Tor).
21470 o Major security fixes (also in 0.2.5.9-rc):
21471 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
21472 today support TLS 1.0 or later, so we can safely turn off support
21473 for this old (and insecure) protocol. Fixes bug 13426.
21475 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
21476 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
21477 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
21478 13471. This is a workaround for an OpenSSL bug.
21481 Changes in version 0.2.5.8-rc - 2014-09-22
21482 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
21483 series. It fixes a bug that affects consistency and speed when
21484 connecting to hidden services, and it updates the location of one of
21485 the directory authorities.
21488 - Clients now send the correct address for their chosen rendezvous
21489 point when trying to access a hidden service. They used to send
21490 the wrong address, which would still work some of the time because
21491 they also sent the identity digest of the rendezvous point, and if
21492 the hidden service happened to try connecting to the rendezvous
21493 point from a relay that already had a connection open to it,
21494 the relay would reuse that connection. Now connections to hidden
21495 services should be more robust and faster. Also, this bug meant
21496 that clients were leaking to the hidden service whether they were
21497 on a little-endian (common) or big-endian (rare) system, which for
21498 some users might have reduced their anonymity. Fixes bug 13151;
21499 bugfix on 0.2.1.5-alpha.
21501 o Directory authority changes:
21502 - Change IP address for gabelmoo (v3 directory authority).
21505 Changes in version 0.2.4.24 - 2014-09-22
21506 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
21507 connecting to hidden services, and it updates the location of one of
21508 the directory authorities.
21511 - Clients now send the correct address for their chosen rendezvous
21512 point when trying to access a hidden service. They used to send
21513 the wrong address, which would still work some of the time because
21514 they also sent the identity digest of the rendezvous point, and if
21515 the hidden service happened to try connecting to the rendezvous
21516 point from a relay that already had a connection open to it,
21517 the relay would reuse that connection. Now connections to hidden
21518 services should be more robust and faster. Also, this bug meant
21519 that clients were leaking to the hidden service whether they were
21520 on a little-endian (common) or big-endian (rare) system, which for
21521 some users might have reduced their anonymity. Fixes bug 13151;
21522 bugfix on 0.2.1.5-alpha.
21524 o Directory authority changes:
21525 - Change IP address for gabelmoo (v3 directory authority).
21527 o Minor features (geoip):
21528 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21532 Changes in version 0.2.5.7-rc - 2014-09-11
21533 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
21534 release series, and some long-standing bugs related to ORPort reachability
21535 testing and failure to send CREATE cells. It is the first release
21536 candidate for the Tor 0.2.5.x series.
21538 o Major bugfixes (client, startup):
21539 - Start making circuits as soon as DisabledNetwork is turned off.
21540 When Tor started with DisabledNetwork set, it would correctly
21541 conclude that it shouldn't build circuits, but it would mistakenly
21542 cache this conclusion, and continue believing it even when
21543 DisableNetwork is set to 0. Fixes the bug introduced by the fix
21544 for bug 11200; bugfix on 0.2.5.4-alpha.
21545 - Resume expanding abbreviations for command-line options. The fix
21546 for bug 4647 accidentally removed our hack from bug 586 that
21547 rewrote HashedControlPassword to __HashedControlSessionPassword
21548 when it appears on the commandline (which allowed the user to set
21549 her own HashedControlPassword in the torrc file while the
21550 controller generates a fresh session password for each run). Fixes
21551 bug 12948; bugfix on 0.2.5.1-alpha.
21552 - Warn about attempts to run hidden services and relays in the same
21553 process: that's probably not a good idea. Closes ticket 12908.
21555 o Major bugfixes (relay):
21556 - Avoid queuing or sending destroy cells for circuit ID zero when we
21557 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
21558 Found and fixed by "cypherpunks".
21559 - Fix ORPort reachability detection on relays running behind a
21560 proxy, by correctly updating the "local" mark on the controlling
21561 channel when changing the address of an or_connection_t after the
21562 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
21564 o Minor features (bridge):
21565 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
21566 cookie file for the ExtORPort g+r by default.
21568 o Minor features (geoip):
21569 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
21572 o Minor bugfixes (logging):
21573 - Reduce the log severity of the "Pluggable transport proxy does not
21574 provide any needed transports and will not be launched." message,
21575 since Tor Browser includes several ClientTransportPlugin lines in
21576 its torrc-defaults file, leading every Tor Browser user who looks
21577 at her logs to see these notices and wonder if they're dangerous.
21578 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
21579 - Downgrade "Unexpected onionskin length after decryption" warning
21580 to a protocol-warn, since there's nothing relay operators can do
21581 about a client that sends them a malformed create cell. Resolves
21582 bug 12996; bugfix on 0.0.6rc1.
21583 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
21584 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
21585 - When logging information about an EXTEND2 or EXTENDED2 cell, log
21586 their names correctly. Fixes part of bug 12700; bugfix
21588 - When logging information about a relay cell whose command we don't
21589 recognize, log its command as an integer. Fixes part of bug 12700;
21590 bugfix on 0.2.1.10-alpha.
21591 - Escape all strings from the directory connection before logging
21592 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
21594 o Minor bugfixes (controller):
21595 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
21596 bug 12864; bugfix on 0.2.5.1-alpha.
21597 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
21598 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
21601 o Minor bugfixes (compilation):
21602 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
21603 bugfix on 0.2.5.5-alpha.
21604 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
21605 0.2.5.1-alpha. Patch from "NewEraCracker".
21606 - In routerlist_assert_ok(), don't take the address of a
21607 routerinfo's cache_info member unless that routerinfo is non-NULL.
21608 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
21609 - Fix a large number of false positive warnings from the clang
21610 analyzer static analysis tool. This should make real warnings
21611 easier for clang analyzer to find. Patch from "teor". Closes
21614 o Distribution (systemd):
21615 - Verify configuration file via ExecStartPre in the systemd unit
21616 file. Patch from intrigeri; resolves ticket 12730.
21617 - Explicitly disable RunAsDaemon in the systemd unit file. Our
21618 current systemd unit uses "Type = simple", so systemd does not
21619 expect tor to fork. If the user has "RunAsDaemon 1" in their
21620 torrc, then things won't work as expected. This is e.g. the case
21621 on Debian (and derivatives), since there we pass "--defaults-torrc
21622 /usr/share/tor/tor-service-defaults-torrc" (that contains
21623 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
21627 - Adjust the URLs in the README to refer to the new locations of
21628 several documents on the website. Fixes bug 12830. Patch from
21630 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
21634 Changes in version 0.2.5.6-alpha - 2014-07-28
21635 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
21636 risk from guard rotation, and fixes a variety of other issues to get
21637 us closer to a release candidate.
21639 o Major features (also in 0.2.4.23):
21640 - Make the number of entry guards configurable via a new
21641 NumEntryGuards consensus parameter, and the number of directory
21642 guards configurable via a new NumDirectoryGuards consensus
21643 parameter. Implements ticket 12688.
21645 o Major bugfixes (also in 0.2.4.23):
21646 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
21647 implementation that caused incorrect results on 32-bit
21648 implementations when certain malformed inputs were used along with
21649 a small class of private ntor keys. This bug does not currently
21650 appear to allow an attacker to learn private keys or impersonate a
21651 Tor server, but it could provide a means to distinguish 32-bit Tor
21652 implementations from 64-bit Tor implementations. Fixes bug 12694;
21653 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
21657 - Perform circuit cleanup operations even when circuit
21658 construction operations are disabled (because the network is
21659 disabled, or because there isn't enough directory information).
21660 Previously, when we were not building predictive circuits, we
21661 were not closing expired circuits either. Fixes bug 8387; bugfix on
21662 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
21663 became more strict about when we have "enough directory information
21664 to build circuits".
21667 - Authorities now assign the Guard flag to the fastest 25% of the
21668 network (it used to be the fastest 50%). Also raise the consensus
21669 weight that guarantees the Guard flag from 250 to 2000. For the
21670 current network, this results in about 1100 guards, down from 2500.
21671 This step paves the way for moving the number of entry guards
21672 down to 1 (proposal 236) while still providing reasonable expected
21673 performance for most users. Implements ticket 12690.
21674 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
21676 - Slightly enhance the diagnostic message for bug 12184.
21678 o Minor bugfixes (also in 0.2.4.23):
21679 - Warn and drop the circuit if we receive an inbound 'relay early'
21680 cell. Those used to be normal to receive on hidden service circuits
21681 due to bug 1038, but the buggy Tor versions are long gone from
21682 the network so we can afford to resume watching for them. Resolves
21683 the rest of bug 1038; bugfix on 0.2.1.19.
21684 - Correct a confusing error message when trying to extend a circuit
21685 via the control protocol but we don't know a descriptor or
21686 microdescriptor for one of the specified relays. Fixes bug 12718;
21687 bugfix on 0.2.3.1-alpha.
21690 - Fix compilation when building with bufferevents enabled. (This
21691 configuration is still not expected to work, however.)
21692 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
21693 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
21695 - Compile correctly with builds and forks of OpenSSL (such as
21696 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
21697 0.2.1.1-alpha. Patch from "dhill".
21700 Changes in version 0.2.4.23 - 2014-07-28
21701 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
21702 guard rotation, and also backports several important fixes from the
21703 Tor 0.2.5 alpha release series.
21706 - Clients now look at the "usecreatefast" consensus parameter to
21707 decide whether to use CREATE_FAST or CREATE cells for the first hop
21708 of their circuit. This approach can improve security on connections
21709 where Tor's circuit handshake is stronger than the available TLS
21710 connection security levels, but the tradeoff is more computational
21711 load on guard relays. Implements proposal 221. Resolves ticket 9386.
21712 - Make the number of entry guards configurable via a new
21713 NumEntryGuards consensus parameter, and the number of directory
21714 guards configurable via a new NumDirectoryGuards consensus
21715 parameter. Implements ticket 12688.
21718 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
21719 implementation that caused incorrect results on 32-bit
21720 implementations when certain malformed inputs were used along with
21721 a small class of private ntor keys. This bug does not currently
21722 appear to allow an attacker to learn private keys or impersonate a
21723 Tor server, but it could provide a means to distinguish 32-bit Tor
21724 implementations from 64-bit Tor implementations. Fixes bug 12694;
21725 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
21729 - Warn and drop the circuit if we receive an inbound 'relay early'
21730 cell. Those used to be normal to receive on hidden service circuits
21731 due to bug 1038, but the buggy Tor versions are long gone from
21732 the network so we can afford to resume watching for them. Resolves
21733 the rest of bug 1038; bugfix on 0.2.1.19.
21734 - Correct a confusing error message when trying to extend a circuit
21735 via the control protocol but we don't know a descriptor or
21736 microdescriptor for one of the specified relays. Fixes bug 12718;
21737 bugfix on 0.2.3.1-alpha.
21738 - Avoid an illegal read from stack when initializing the TLS
21739 module using a version of OpenSSL without all of the ciphers
21740 used by the v2 link handshake. Fixes bug 12227; bugfix on
21741 0.2.4.8-alpha. Found by "starlight".
21744 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
21748 Changes in version 0.2.5.5-alpha - 2014-06-18
21749 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
21750 0.2.5.x release series, including a couple of DoS issues, some
21751 performance regressions, a large number of bugs affecting the Linux
21752 seccomp2 sandbox code, and various other bugfixes. It also adds
21753 diagnostic bugfixes for a few tricky issues that we're trying to
21756 o Major features (security, traffic analysis resistance):
21757 - Several major improvements to the algorithm used to decide when to
21758 close TLS connections. Previous versions of Tor closed connections
21759 at a fixed interval after the last time a non-padding cell was
21760 sent over the connection, regardless of the target of the
21761 connection. Now, we randomize the intervals by adding up to 50% of
21762 their base value, we measure the length of time since connection
21763 last had at least one circuit, and we allow connections to known
21764 ORs to remain open a little longer (15 minutes instead of 3
21765 minutes minimum). These changes should improve Tor's resistance
21766 against some kinds of traffic analysis, and lower some overhead
21767 from needlessly closed connections. Fixes ticket 6799.
21768 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
21770 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
21771 - Fix a memory leak that could occur if a microdescriptor parse
21772 fails during the tokenizing step. This bug could enable a memory
21773 exhaustion attack by directory servers. Fixes bug 11649; bugfix
21776 o Major bugfixes (security, directory authorities):
21777 - Directory authorities now include a digest of each relay's
21778 identity key as a part of its microdescriptor.
21780 This is a workaround for bug 11743 (reported by "cypherpunks"),
21781 where Tor clients do not support receiving multiple
21782 microdescriptors with the same SHA256 digest in the same
21783 consensus. When clients receive a consensus like this, they only
21784 use one of the relays. Without this fix, a hostile relay could
21785 selectively disable some client use of target relays by
21786 constructing a router descriptor with a different identity and the
21787 same microdescriptor parameters and getting the authorities to
21788 list it in a microdescriptor consensus. This fix prevents an
21789 attacker from causing a microdescriptor collision, because the
21790 router's identity is not forgeable.
21792 o Major bugfixes (relay):
21793 - Use a direct dirport connection when uploading non-anonymous
21794 descriptors to the directory authorities. Previously, relays would
21795 incorrectly use tunnel connections under a fairly wide variety of
21796 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
21797 - When a circuit accidentally has the same circuit ID for its
21798 forward and reverse direction, correctly detect the direction of
21799 cells using that circuit. Previously, this bug made roughly one
21800 circuit in a million non-functional. Fixes bug 12195; this is a
21801 bugfix on every version of Tor.
21803 o Major bugfixes (client, pluggable transports):
21804 - When managing pluggable transports, use OS notification facilities
21805 to learn if they have crashed, and don't attempt to kill any
21806 process that has already exited. Fixes bug 8746; bugfix
21809 o Minor features (diagnostic):
21810 - When logging a warning because of bug 7164, additionally check the
21811 hash table for consistency (as proposed on ticket 11737). This may
21812 help diagnose bug 7164.
21813 - When we log a heartbeat, log how many one-hop circuits we have
21814 that are at least 30 minutes old, and log status information about
21815 a few of them. This is an attempt to track down bug 8387.
21816 - When encountering an unexpected CR while writing text to a file on
21817 Windows, log the name of the file. Should help diagnosing
21819 - Give more specific warnings when a client notices that an onion
21820 handshake has failed. Fixes ticket 9635.
21821 - Add significant new logging code to attempt to diagnose bug 12184,
21822 where relays seem to run out of available circuit IDs.
21823 - Improve the diagnostic log message for bug 8387 even further to
21824 try to improve our odds of figuring out why one-hop directory
21825 circuits sometimes do not get closed.
21827 o Minor features (security, memory management):
21828 - Memory allocation tricks (mempools and buffer freelists) are now
21829 disabled by default. You can turn them back on with
21830 --enable-mempools and --enable-buf-freelists respectively. We're
21831 disabling these features because malloc performance is good enough
21832 on most platforms, and a similar feature in OpenSSL exacerbated
21833 exploitation of the Heartbleed attack. Resolves ticket 11476.
21835 o Minor features (security):
21836 - Apply the secure SipHash-2-4 function to the hash table mapping
21837 circuit IDs and channels to circuits. We missed this one when we
21838 were converting all the other hash functions to use SipHash back
21839 in 0.2.5.3-alpha. Resolves ticket 11750.
21841 o Minor features (build):
21842 - The configure script has a --disable-seccomp option to turn off
21843 support for libseccomp on systems that have it, in case it (or
21844 Tor's use of it) is broken. Resolves ticket 11628.
21846 o Minor features (other):
21847 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
21850 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
21851 - When running a hidden service, do not allow TunneledDirConns 0;
21852 this will keep the hidden service from running, and also
21853 make it publish its descriptors directly over HTTP. Fixes bug 10849;
21854 bugfix on 0.2.1.1-alpha.
21856 o Minor bugfixes (performance):
21857 - Avoid a bug where every successful connection made us recompute
21858 the flag telling us whether we have sufficient information to
21859 build circuits. Previously, we would forget our cached value
21860 whenever we successfully opened a channel (or marked a router as
21861 running or not running for any other reason), regardless of
21862 whether we had previously believed the router to be running. This
21863 forced us to run an expensive update operation far too often.
21864 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
21865 - Avoid using tor_memeq() for checking relay cell integrity. This
21866 removes a possible performance bottleneck. Fixes part of bug
21867 12169; bugfix on 0.2.1.31.
21869 o Minor bugfixes (compilation):
21870 - Fix compilation of test_status.c when building with MVSC. Bugfix
21871 on 0.2.5.4-alpha. Patch from Gisle Vanem.
21872 - Resolve GCC complaints on OpenBSD about discarding constness in
21873 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
21874 on 0.1.1.23. Patch from Dana Koch.
21875 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
21876 treatment of long and time_t as comparable types. Fixes part of
21877 bug 11633. Patch from Dana Koch.
21878 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
21879 11623; bugfix on 0.2.5.3-alpha.
21880 - When deciding whether to build the 64-bit curve25519
21881 implementation, detect platforms where we can compile 128-bit
21882 arithmetic but cannot link it. Fixes bug 11729; bugfix on
21883 0.2.4.8-alpha. Patch from "conradev".
21884 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
21885 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
21886 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
21889 o Minor bugfixes (Directory server):
21890 - When sending a compressed set of descriptors or microdescriptors,
21891 make sure to finalize the zlib stream. Previously, we would write
21892 all the compressed data, but if the last descriptor we wanted to
21893 send was missing or too old, we would not mark the stream as
21894 finished. This caused problems for decompression tools. Fixes bug
21895 11648; bugfix on 0.1.1.23.
21897 o Minor bugfixes (Linux seccomp sandbox):
21898 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
21899 11622; bugfix on 0.2.5.1-alpha.
21900 - Avoid crashing when re-opening listener ports with the seccomp
21901 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
21902 - Avoid crashing with the seccomp sandbox enabled along with
21903 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
21904 - When we receive a SIGHUP with the sandbox enabled, correctly
21905 support rotating our log files. Fixes bug 12032; bugfix
21907 - Avoid crash when running with sandboxing enabled and
21908 DirReqStatistics not disabled. Fixes bug 12035; bugfix
21910 - Fix a "BUG" warning when trying to write bridge-stats files with
21911 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
21913 - Prevent the sandbox from crashing on startup when run with the
21914 --enable-expensive-hardening configuration option. Fixes bug
21915 11477; bugfix on 0.2.5.4-alpha.
21916 - When running with DirPortFrontPage and sandboxing both enabled,
21917 reload the DirPortFrontPage correctly when restarting. Fixes bug
21918 12028; bugfix on 0.2.5.1-alpha.
21919 - Don't try to enable the sandbox when using the Tor binary to check
21920 its configuration, hash a passphrase, or so on. Doing so was
21921 crashing on startup for some users. Fixes bug 11609; bugfix
21923 - Avoid warnings when running with sandboxing and node statistics
21924 enabled at the same time. Fixes part of 12064; bugfix on
21925 0.2.5.1-alpha. Patch from Michael Wolf.
21926 - Avoid warnings when running with sandboxing enabled at the same
21927 time as cookie authentication, hidden services, or directory
21928 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
21929 - Do not allow options that require calls to exec to be enabled
21930 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
21931 bug 12043; bugfix on 0.2.5.1-alpha.
21932 - Handle failures in getpwnam()/getpwuid() when running with the
21933 User option set and the Linux syscall sandbox enabled. Fixes bug
21934 11946; bugfix on 0.2.5.1-alpha.
21935 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
21936 to avoid calling getaddrinfo() after installing the sandbox
21937 filters. Previously, it preloaded a cache with the IPv4 address
21938 for our hostname, and nothing else. Now, it loads the cache with
21939 every address that it used to initialize the Tor process. Fixes
21940 bug 11970; bugfix on 0.2.5.1-alpha.
21942 o Minor bugfixes (pluggable transports):
21943 - Enable the ExtORPortCookieAuthFile option, to allow changing the
21944 default location of the authentication token for the extended OR
21945 Port as used by sever-side pluggable transports. We had
21946 implemented this option before, but the code to make it settable
21947 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
21948 - Avoid another 60-second delay when starting Tor in a pluggable-
21949 transport-using configuration when we already have cached
21950 descriptors for our bridges. Fixes bug 11965; bugfix
21953 o Minor bugfixes (client):
21954 - Avoid "Tried to open a socket with DisableNetwork set" warnings
21955 when starting a client with bridges configured and DisableNetwork
21956 set. (Tor launcher starts Tor with DisableNetwork set the first
21957 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
21959 o Minor bugfixes (testing):
21960 - The Python parts of the test scripts now work on Python 3 as well
21961 as Python 2, so systems where '/usr/bin/python' is Python 3 will
21962 no longer have the tests break. Fixes bug 11608; bugfix
21964 - When looking for versions of python that we could run the tests
21965 with, check for "python2.7" and "python3.3"; previously we were
21966 only looking for "python", "python2", and "python3". Patch from
21967 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
21968 - Fix all valgrind warnings produced by the unit tests. There were
21969 over a thousand memory leak warnings previously, mostly produced
21970 by forgetting to free things in the unit test code. Fixes bug
21971 11618, bugfixes on many versions of Tor.
21973 o Minor bugfixes (tor-fw-helper):
21974 - Give a correct log message when tor-fw-helper fails to launch.
21975 (Previously, we would say something like "tor-fw-helper sent us a
21976 string we could not parse".) Fixes bug 9781; bugfix
21979 o Minor bugfixes (relay, threading):
21980 - Check return code on spawn_func() in cpuworker code, so that we
21981 don't think we've spawned a nonworking cpuworker and write junk to
21982 it forever. Fix related to bug 4345; bugfix on all released Tor
21983 versions. Found by "skruffy".
21984 - Use a pthread_attr to make sure that spawn_func() cannot return an
21985 error while at the same time launching a thread. Fix related to
21986 bug 4345; bugfix on all released Tor versions. Reported
21989 o Minor bugfixes (relay, oom prevention):
21990 - Correctly detect the total available system memory. We tried to do
21991 this in 0.2.5.4-alpha, but the code was set up to always return an
21992 error value, even on success. Fixes bug 11805; bugfix
21995 o Minor bugfixes (relay, other):
21996 - We now drop CREATE cells for already-existent circuit IDs and for
21997 zero-valued circuit IDs, regardless of other factors that might
21998 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
22000 - Avoid an illegal read from stack when initializing the TLS module
22001 using a version of OpenSSL without all of the ciphers used by the
22002 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
22004 - When rejecting DATA cells for stream_id zero, still count them
22005 against the circuit's deliver window so that we don't fail to send
22006 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
22008 o Minor bugfixes (logging):
22009 - Fix a misformatted log message about delayed directory fetches.
22010 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
22011 - Squelch a spurious LD_BUG message "No origin circuit for
22012 successful SOCKS stream" in certain hidden service failure cases;
22016 - Include a tor.service file in contrib/dist for use with systemd.
22017 Some distributions will be able to use this file unmodified;
22018 others will need to tweak it, or write their own. Patch from Jamie
22019 Nguyen; resolves ticket 8368.
22022 - Clean up several option names in the manpage to match their real
22023 names, add the missing documentation for a couple of testing and
22024 directory authority options, remove the documentation for a
22025 V2-directory fetching option that no longer exists. Resolves
22027 - Correct the documentation so that it lists the correct directory
22028 for the stats files. (They are in a subdirectory called "stats",
22030 - In the manpage, move more authority-only options into the
22031 directory authority section so that operators of regular directory
22032 caches don't get confused.
22035 - The contrib directory has been sorted and tidied. Before, it was
22036 an unsorted dumping ground for useful and not-so-useful things.
22037 Now, it is divided based on functionality, and the items which
22038 seemed to be nonfunctional or useless have been removed. Resolves
22039 ticket 8966; based on patches from "rl1987".
22042 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
22043 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
22044 - The TunnelDirConns and PreferTunnelledDirConns options no longer
22045 exist; tunneled directory connections have been available since
22046 0.1.2.5-alpha, and turning them off is not a good idea. This is a
22047 brute-force fix for 10849, where "TunnelDirConns 0" would break
22051 Changes in version 0.2.4.22 - 2014-05-16
22052 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
22053 alpha release series. These include blocking all authority signing
22054 keys that may have been affected by the OpenSSL "heartbleed" bug,
22055 choosing a far more secure set of TLS ciphersuites by default, closing
22056 a couple of memory leaks that could be used to run a target relay out
22057 of RAM, and several others.
22059 o Major features (security, backport from 0.2.5.4-alpha):
22060 - Block authority signing keys that were used on authorities
22061 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22062 don't have any evidence that these keys _were_ compromised; we're
22063 doing this to be prudent.) Resolves ticket 11464.
22065 o Major bugfixes (security, OOM):
22066 - Fix a memory leak that could occur if a microdescriptor parse
22067 fails during the tokenizing step. This bug could enable a memory
22068 exhaustion attack by directory servers. Fixes bug 11649; bugfix
22071 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
22072 - The relay ciphersuite list is now generated automatically based on
22073 uniform criteria, and includes all OpenSSL ciphersuites with
22074 acceptable strength and forward secrecy. Previously, we had left
22075 some perfectly fine ciphersuites unsupported due to omission or
22076 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22077 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22078 - Relays now trust themselves to have a better view than clients of
22079 which TLS ciphersuites are better than others. (Thanks to bug
22080 11513, the relay list is now well-considered, whereas the client
22081 list has been chosen mainly for anti-fingerprinting purposes.)
22082 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22083 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22084 AES128. Resolves ticket 11528.
22085 - Clients now try to advertise the same list of ciphersuites as
22086 Firefox 28. This change enables selection of (fast) GCM
22087 ciphersuites, disables some strange old ciphers, and stops
22088 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22089 Resolves ticket 11438.
22091 o Minor bugfixes (configuration, security):
22092 - When running a hidden service, do not allow TunneledDirConns 0:
22093 trying to set that option together with a hidden service would
22094 otherwise prevent the hidden service from running, and also make
22095 it publish its descriptors directly over HTTP. Fixes bug 10849;
22096 bugfix on 0.2.1.1-alpha.
22098 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
22099 - Avoid sending a garbage value to the controller when a circuit is
22100 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22102 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
22103 - Stop leaking memory when we successfully resolve a PTR record.
22104 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22106 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
22107 - Avoid 60-second delays in the bootstrapping process when Tor is
22108 launching for a second time while using bridges. Fixes bug 9229;
22109 bugfix on 0.2.0.3-alpha.
22111 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
22112 - Give the correct URL in the warning message when trying to run a
22113 relay on an ancient version of Windows. Fixes bug 9393.
22115 o Minor bugfixes (compilation):
22116 - Fix a compilation error when compiling with --disable-curve25519.
22117 Fixes bug 9700; bugfix on 0.2.4.17-rc.
22120 - Downgrade the warning severity for the the "md was still
22121 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
22122 for trying to diagnose this bug, and the current warning in
22123 earlier versions of tor achieves nothing useful. Addresses warning
22126 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
22127 - When we run out of usable circuit IDs on a channel, log only one
22128 warning for the whole channel, and describe how many circuits
22129 there were on the channel. Fixes part of ticket 11553.
22131 o Minor features (security, backport from 0.2.5.4-alpha):
22132 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
22133 leave the default at 8GBytes), to better support Raspberry Pi
22134 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
22136 o Documentation (backport from 0.2.5.4-alpha):
22137 - Correctly document that we search for a system torrc file before
22138 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22142 Changes in version 0.2.5.4-alpha - 2014-04-25
22143 Tor 0.2.5.4-alpha includes several security and performance
22144 improvements for clients and relays, including blacklisting authority
22145 signing keys that were used while susceptible to the OpenSSL
22146 "heartbleed" bug, fixing two expensive functions on busy relays,
22147 improved TLS ciphersuite preference lists, support for run-time
22148 hardening on compilers that support AddressSanitizer, and more work on
22149 the Linux sandbox code.
22151 There are also several usability fixes for clients (especially clients
22152 that use bridges), two new TransPort protocols supported (one on
22153 OpenBSD, one on FreeBSD), and various other bugfixes.
22155 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
22156 have accumulated many known flaws; everyone should upgrade.
22158 o Major features (security):
22159 - If you don't specify MaxMemInQueues yourself, Tor now tries to
22160 pick a good value based on your total system memory. Previously,
22161 the default was always 8 GB. You can still override the default by
22162 setting MaxMemInQueues yourself. Resolves ticket 11396.
22163 - Block authority signing keys that were used on authorities
22164 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
22165 don't have any evidence that these keys _were_ compromised; we're
22166 doing this to be prudent.) Resolves ticket 11464.
22168 o Major features (relay performance):
22169 - Speed up server-side lookups of rendezvous and introduction point
22170 circuits by using hashtables instead of linear searches. These
22171 functions previously accounted between 3 and 7% of CPU usage on
22172 some busy relays. Resolves ticket 9841.
22173 - Avoid wasting CPU when extending a circuit over a channel that is
22174 nearly out of circuit IDs. Previously, we would do a linear scan
22175 over possible circuit IDs before finding one or deciding that we
22176 had exhausted our possibilities. Now, we try at most 64 random
22177 circuit IDs before deciding that we probably won't succeed. Fixes
22178 a possible root cause of ticket 11553.
22180 o Major features (seccomp2 sandbox, Linux only):
22181 - The seccomp2 sandbox can now run a test network for multiple hours
22182 without crashing. The sandbox is still experimental, and more bugs
22183 will probably turn up. To try it, enable "Sandbox 1" on a Linux
22184 host. Resolves ticket 11351.
22185 - Strengthen sandbox code: the sandbox can now test the arguments
22186 for rename(), and blocks _sysctl() entirely. Resolves another part
22188 - When the sandbox blocks a system call, it now tries to log a stack
22189 trace before exiting. Resolves ticket 11465.
22191 o Major bugfixes (TLS cipher selection):
22192 - The relay ciphersuite list is now generated automatically based on
22193 uniform criteria, and includes all OpenSSL ciphersuites with
22194 acceptable strength and forward secrecy. Previously, we had left
22195 some perfectly fine ciphersuites unsupported due to omission or
22196 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
22197 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
22198 - Relays now trust themselves to have a better view than clients of
22199 which TLS ciphersuites are better than others. (Thanks to bug
22200 11513, the relay list is now well-considered, whereas the client
22201 list has been chosen mainly for anti-fingerprinting purposes.)
22202 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
22203 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
22204 AES128. Resolves ticket 11528.
22205 - Clients now try to advertise the same list of ciphersuites as
22206 Firefox 28. This change enables selection of (fast) GCM
22207 ciphersuites, disables some strange old ciphers, and stops
22208 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
22209 Resolves ticket 11438.
22211 o Major bugfixes (bridge client):
22212 - Avoid 60-second delays in the bootstrapping process when Tor is
22213 launching for a second time while using bridges. Fixes bug 9229;
22214 bugfix on 0.2.0.3-alpha.
22216 o Minor features (transparent proxy, *BSD):
22217 - Support FreeBSD's ipfw firewall interface for TransPort ports on
22218 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
22219 10267; patch from "yurivict".
22220 - Support OpenBSD's divert-to rules with the pf firewall for
22221 transparent proxy ports. To enable it, set "TransProxyType
22222 pf-divert". This allows Tor to run a TransPort transparent proxy
22223 port on OpenBSD 4.4 or later without root privileges. See the
22224 pf.conf(5) manual page for information on configuring pf to use
22225 divert-to rules. Closes ticket 10896; patch from Dana Koch.
22227 o Minor features (security):
22228 - New --enable-expensive-hardening option to enable security
22229 hardening options that consume nontrivial amounts of CPU and
22230 memory. Right now, this includes AddressSanitizer and UbSan, which
22231 are supported in newer versions of GCC and Clang. Closes ticket
22234 o Minor features (log verbosity):
22235 - Demote the message that we give when a flushing connection times
22236 out for too long from NOTICE to INFO. It was usually meaningless.
22237 Resolves ticket 5286.
22238 - Don't log so many notice-level bootstrapping messages at startup
22239 about downloading descriptors. Previously, we'd log a notice
22240 whenever we learned about more routers. Now, we only log a notice
22241 at every 5% of progress. Fixes bug 9963.
22242 - Warn less verbosely when receiving a malformed
22243 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
22244 - When we run out of usable circuit IDs on a channel, log only one
22245 warning for the whole channel, and describe how many circuits
22246 there were on the channel. Fixes part of ticket 11553.
22248 o Minor features (relay):
22249 - If a circuit timed out for at least 3 minutes, check if we have a
22250 new external IP address, and publish a new descriptor with the new
22251 IP address if it changed. Resolves ticket 2454.
22253 o Minor features (controller):
22254 - Make the entire exit policy available from the control port via
22255 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
22257 - Because of the fix for ticket 11396, the real limit for memory
22258 usage may no longer match the configured MaxMemInQueues value. The
22259 real limit is now exposed via GETINFO limits/max-mem-in-queues.
22261 o Minor features (bridge client):
22262 - Report a more useful failure message when we can't connect to a
22263 bridge because we don't have the right pluggable transport
22264 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
22266 o Minor features (diagnostic):
22267 - Add more log messages to diagnose bug 7164, which causes
22268 intermittent "microdesc_free() called but md was still referenced"
22269 warnings. We now include more information, to figure out why we
22270 might be cleaning a microdescriptor for being too old if it's
22271 still referenced by a live node_t object.
22273 o Minor bugfixes (client, DNSPort):
22274 - When using DNSPort, try to respond to AAAA requests with AAAA
22275 answers. Previously, we hadn't looked at the request type when
22276 deciding which answer type to prefer. Fixes bug 10468; bugfix on
22278 - When receiving a DNS query for an unsupported record type, reply
22279 with no answer rather than with a NOTIMPL error. This behavior
22280 isn't correct either, but it will break fewer client programs, we
22281 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
22284 o Minor bugfixes (exit relay):
22285 - Stop leaking memory when we successfully resolve a PTR record.
22286 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
22288 o Minor bugfixes (bridge client):
22289 - Stop accepting bridge lines containing hostnames. Doing so would
22290 cause clients to perform DNS requests on the hostnames, which was
22291 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
22292 - Avoid a 60-second delay in the bootstrapping process when a Tor
22293 client with pluggable transports re-reads its configuration at
22294 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
22296 o Minor bugfixes (client, logging during bootstrap):
22297 - Warn only once if we start logging in an unsafe way. Previously,
22298 we complain as many times as we had problems. Fixes bug 9870;
22299 bugfix on 0.2.5.1-alpha.
22300 - Only report the first fatal bootstrap error on a given OR
22301 connection. This stops us from telling the controller bogus error
22302 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
22303 - Be more helpful when trying to run sandboxed on Linux without
22304 libseccomp. Instead of saying "Sandbox is not implemented on this
22305 platform", we now explain that we need to be built with
22306 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
22307 - Avoid generating spurious warnings when starting with
22308 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
22311 o Minor bugfixes (closing OR connections):
22312 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
22313 check if it's an or_connection_t and correctly call
22314 connection_or_close_for_error() rather than
22315 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
22317 - When closing all connections on setting DisableNetwork to 1, use
22318 connection_or_close_normally() rather than closing OR connections
22319 out from under the channel layer. Fixes bug 11306; bugfix on
22322 o Minor bugfixes (controller):
22323 - Avoid sending a garbage value to the controller when a circuit is
22324 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
22326 o Minor bugfixes (tor-fw-helper):
22327 - Allow tor-fw-helper to build again by adding src/ext to its
22328 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
22330 o Minor bugfixes (bridges):
22331 - Avoid potential crashes or bad behavior when launching a
22332 server-side managed proxy with ORPort or ExtORPort temporarily
22333 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
22335 o Minor bugfixes (platform-specific):
22336 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
22337 bug 11426; bugfix on 0.2.5.3-alpha.
22338 - When dumping a malformed directory object to disk, save it in
22339 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
22341 - Don't report failures from make_socket_reuseable() on incoming
22342 sockets on OSX: this can happen when incoming connections close
22343 early. Fixes bug 10081.
22345 o Minor bugfixes (trivial memory leaks):
22346 - Fix a small memory leak when signing a directory object. Fixes bug
22347 11275; bugfix on 0.2.4.13-alpha.
22348 - Free placeholder entries in our circuit table at exit; fixes a
22349 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
22350 - Don't re-initialize a second set of OpenSSL mutexes when starting
22351 up. Previously, we'd make one set of mutexes, and then immediately
22352 replace them with another. Fixes bug 11726; bugfix on
22354 - Resolve some memory leaks found by coverity in the unit tests, on
22355 exit in tor-gencert, and on a failure to compute digests for our
22356 own keys when generating a v3 networkstatus vote. These leaks
22357 should never have affected anyone in practice.
22359 o Minor bugfixes (hidden service):
22360 - Only retry attempts to connect to a chosen rendezvous point 8
22361 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
22363 o Minor bugfixes (misc code correctness):
22364 - Fix various instances of undefined behavior in channeltls.c,
22365 tor_memmem(), and eventdns.c that would cause us to construct
22366 pointers to memory outside an allocated object. (These invalid
22367 pointers were not accessed, but C does not even allow them to
22368 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
22369 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
22370 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
22371 fix some miscellaneous errors in our tests and codebase. Fixes bug
22372 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
22373 - Always check return values for unlink, munmap, UnmapViewOfFile;
22374 check strftime return values more often. In some cases all we can
22375 do is report a warning, but this may help prevent deeper bugs from
22376 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
22378 - Fix numerous warnings from the clang "scan-build" static analyzer.
22379 Some of these are programming style issues; some of them are false
22380 positives that indicated awkward code; some are undefined behavior
22381 cases related to constructing (but not using) invalid pointers;
22382 some are assumptions about API behavior; some are (harmlessly)
22383 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
22384 correct; and one or two are genuine bugs that weren't reachable
22385 from the rest of the program. Fixes bug 8793; bugfixes on many,
22389 - Build the torify.1 manpage again. Previously, we were only trying
22390 to build it when also building tor-fw-helper. That's why we didn't
22391 notice that we'd broken the ability to build it. Fixes bug 11321;
22392 bugfix on 0.2.5.1-alpha.
22393 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
22394 11061; bugfix on 0.2.4.7-alpha.
22395 - Correctly document that we search for a system torrc file before
22396 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
22398 - Resolve warnings from Doxygen.
22400 o Code simplifications and refactoring:
22401 - Remove is_internal_IP() function. Resolves ticket 4645.
22402 - Remove unused function circuit_dump_by_chan from circuitlist.c.
22403 Closes issue 9107; patch from "marek".
22404 - Change our use of the ENUM_BF macro to avoid declarations that
22407 o Deprecated versions:
22408 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
22409 attention for some while. Directory authorities no longer accept
22410 descriptors from relays running any version of Tor prior to Tor
22411 0.2.3.16-alpha. Resolves ticket 11149.
22414 - New macros in test.h to simplify writing mock-functions for unit
22415 tests. Part of ticket 11507. Patch from Dana Koch.
22416 - Complete tests for the status.c module. Resolves ticket 11507.
22417 Patch from Dana Koch.
22420 - Remove all code for the long unused v1 directory protocol.
22421 Resolves ticket 11070.
22424 Changes in version 0.2.5.3-alpha - 2014-03-22
22425 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
22426 two new anti-DoS features for Tor relays, resolves a bug that kept
22427 SOCKS5 support for IPv6 from working, fixes several annoying usability
22428 issues for bridge users, and removes more old code for unused
22431 The Tor 0.2.5.x release series is now in patch-freeze: no feature
22432 patches not already written will be considered for inclusion in 0.2.5.x.
22434 o Major features (relay security, DoS-resistance):
22435 - When deciding whether we have run out of memory and we need to
22436 close circuits, also consider memory allocated in buffers for
22437 streams attached to each circuit.
22439 This change, which extends an anti-DoS feature introduced in
22440 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
22441 better resist more memory-based DoS attacks than before. Since the
22442 MaxMemInCellQueues option now applies to all queues, it is renamed
22443 to MaxMemInQueues. This feature fixes bug 10169.
22444 - Avoid hash-flooding denial-of-service attacks by using the secure
22445 SipHash-2-4 hash function for our hashtables. Without this
22446 feature, an attacker could degrade performance of a targeted
22447 client or server by flooding their data structures with a large
22448 number of entries to be stored at the same hash table position,
22449 thereby slowing down the Tor instance. With this feature, hash
22450 table positions are derived from a randomized cryptographic key,
22451 and an attacker cannot predict which entries will collide. Closes
22453 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
22454 the default at 8GBytes), to better support Raspberry Pi users. Fixes
22455 bug 9686; bugfix on 0.2.4.14-alpha.
22457 o Minor features (bridges, pluggable transports):
22458 - Bridges now write the SHA1 digest of their identity key
22459 fingerprint (that is, a hash of a hash of their public key) to
22460 notice-level logs, and to a new hashed-fingerprint file. This
22461 information will help bridge operators look up their bridge in
22462 Globe and similar tools. Resolves ticket 10884.
22463 - Improve the message that Tor displays when running as a bridge
22464 using pluggable transports without an Extended ORPort listener.
22465 Also, log the message in the log file too. Resolves ticket 11043.
22467 o Minor features (other):
22468 - Add a new option, PredictedPortsRelevanceTime, to control how long
22469 after having received a request to connect to a given port Tor
22470 will try to keep circuits ready in anticipation of future requests
22471 for that port. Patch from "unixninja92"; implements ticket 9176.
22472 - Generate a warning if any ports are listed in the SocksPolicy,
22473 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
22474 AuthDirBadExit options. (These options only support address
22475 ranges.) Fixes part of ticket 11108.
22476 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
22479 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
22480 - Build without warnings under clang 3.4. (We have some macros that
22481 define static functions only some of which will get used later in
22482 the module. Starting with clang 3.4, these give a warning unless the
22483 unused attribute is set on them.) Resolves ticket 10904.
22484 - Fix build warnings about missing "a2x" comment when building the
22485 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22486 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22488 o Minor bugfixes (client):
22489 - Improve the log message when we can't connect to a hidden service
22490 because all of the hidden service directory nodes hosting its
22491 descriptor are excluded. Improves on our fix for bug 10722, which
22492 was a bugfix on 0.2.0.10-alpha.
22493 - Raise a control port warning when we fail to connect to all of
22494 our bridges. Previously, we didn't inform the controller, and
22495 the bootstrap process would stall. Fixes bug 11069; bugfix on
22497 - Exit immediately when a process-owning controller exits.
22498 Previously, tor relays would wait for a little while after their
22499 controller exited, as if they had gotten an INT signal -- but this
22500 was problematic, since there was no feedback for the user. To do a
22501 clean shutdown, controllers should send an INT signal and give Tor
22502 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
22503 - Stop attempting to connect to bridges before our pluggable
22504 transports are configured (harmless but resulted in some erroneous
22505 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
22506 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
22507 generating incorrect SOCKS5 responses, and confusing client
22508 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
22510 o Minor bugfixes (relays and bridges):
22511 - Avoid crashing on a malformed resolv.conf file when running a
22512 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
22513 - Non-exit relays no longer launch mock DNS requests to check for
22514 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
22515 non-exit relays stopped servicing DNS requests. Fixes bug 965;
22516 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
22517 - Bridges now report complete directory request statistics. Related
22518 to bug 5824; bugfix on 0.2.2.1-alpha.
22519 - Bridges now never collect statistics that were designed for
22520 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
22521 - Stop giving annoying warning messages when we decide not to launch
22522 a pluggable transport proxy that we don't need (because there are
22523 no bridges configured to use it). Resolves ticket 5018; bugfix
22525 - Give the correct URL in the warning message when trying to run a
22526 relay on an ancient version of Windows. Fixes bug 9393.
22528 o Minor bugfixes (backtrace support):
22529 - Support automatic backtraces on more platforms by using the
22530 "-fasynchronous-unwind-tables" compiler option. This option is
22531 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
22532 is on by default and table generation is not. This doesn't yet
22533 add Windows support; only Linux, OSX, and some BSDs are affected.
22534 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
22535 - Avoid strange behavior if two threads hit failed assertions at the
22536 same time and both try to log backtraces at once. (Previously, if
22537 this had happened, both threads would have stored their intermediate
22538 results in the same buffer, and generated junk outputs.) Reported by
22539 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
22540 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
22541 0.2.5.2-alpha; patch from Nick Hopper.
22543 o Minor bugfixes (unit tests):
22544 - Fix a small bug in the unit tests that might have made the tests
22545 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
22546 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
22549 - Remove all remaining code related to version-0 hidden service
22550 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
22551 the rest of bug 10841.
22554 - Document in the manpage that "KBytes" may also be written as
22555 "kilobytes" or "KB", that "Kbits" may also be written as
22556 "kilobits", and so forth. Closes ticket 9222.
22557 - Document that the ClientOnly config option overrides ORPort.
22558 Our old explanation made ClientOnly sound as though it did
22559 nothing at all. Resolves bug 9059.
22560 - Explain that SocksPolicy, DirPolicy, and similar options don't
22561 take port arguments. Fixes the other part of ticket 11108.
22562 - Fix a comment about the rend_server_descriptor_t.protocols field
22563 to more accurately describe its range. Also, make that field
22564 unsigned, to more accurately reflect its usage. Fixes bug 9099;
22565 bugfix on 0.2.1.5-alpha.
22566 - Fix the manpage's description of HiddenServiceAuthorizeClient:
22567 the maximum client name length is 16, not 19. Fixes bug 11118;
22568 bugfix on 0.2.1.6-alpha.
22570 o Code simplifications and refactoring:
22571 - Get rid of router->address, since in all cases it was just the
22572 string representation of router->addr. Resolves ticket 5528.
22574 o Test infrastructure:
22575 - Update to the latest version of tinytest.
22576 - Improve the tinytest implementation of string operation tests so
22577 that comparisons with NULL strings no longer crash the tests; they
22578 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
22581 Changes in version 0.2.4.21 - 2014-02-28
22582 Tor 0.2.4.21 further improves security against potential adversaries who
22583 find breaking 1024-bit crypto doable, and backports several stability
22584 and robustness patches from the 0.2.5 branch.
22586 o Major features (client security):
22587 - When we choose a path for a 3-hop circuit, make sure it contains
22588 at least one relay that supports the NTor circuit extension
22589 handshake. Otherwise, there is a chance that we're building
22590 a circuit that's worth attacking by an adversary who finds
22591 breaking 1024-bit crypto doable, and that chance changes the game
22592 theory. Implements ticket 9777.
22595 - Do not treat streams that fail with reason
22596 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
22597 since it could also indicate an ENETUNREACH connection error. Fixes
22598 part of bug 10777; bugfix on 0.2.4.8-alpha.
22600 o Code simplification and refactoring:
22601 - Remove data structures which were introduced to implement the
22602 CellStatistics option: they are now redundant with the new timestamp
22603 field in the regular packed_cell_t data structure, which we did
22604 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
22607 - Always clear OpenSSL bignums before freeing them -- even bignums
22608 that don't contain secrets. Resolves ticket 10793. Patch by
22610 - Build without warnings under clang 3.4. (We have some macros that
22611 define static functions only some of which will get used later in
22612 the module. Starting with clang 3.4, these give a warning unless the
22613 unused attribute is set on them.) Resolves ticket 10904.
22614 - Update geoip and geoip6 files to the February 7 2014 Maxmind
22615 GeoLite2 Country database.
22618 - Set the listen() backlog limit to the largest actually supported
22619 on the system, not to the value in a header file. Fixes bug 9716;
22620 bugfix on every released Tor.
22621 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
22622 exit node as a NOROUTE error, not an INTERNAL error, since they
22623 can apparently happen when trying to connect to the wrong sort
22624 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
22625 - Fix build warnings about missing "a2x" comment when building the
22626 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
22627 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
22628 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
22629 not entirely remove it from the connection lists. Fixes bug 9602;
22630 bugfix on 0.2.4.4-alpha.
22631 - Fix a segmentation fault in our benchmark code when running with
22632 Fedora's OpenSSL package, or any other OpenSSL that provides
22633 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
22634 - Turn "circuit handshake stats since last time" log messages into a
22635 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
22637 o Documentation fixes:
22638 - Document that all but one DirPort entry must have the NoAdvertise
22639 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
22642 Changes in version 0.2.5.2-alpha - 2014-02-13
22643 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
22644 like the "poor random number generation" fix and the "building too many
22645 circuits" fix. It also further improves security against potential
22646 adversaries who find breaking 1024-bit crypto doable, and launches
22647 pluggable transports on demand (which gets us closer to integrating
22648 pluggable transport support by default -- not to be confused with Tor
22649 bundles enabling pluggable transports and bridges by default).
22651 o Major features (client security):
22652 - When we choose a path for a 3-hop circuit, make sure it contains
22653 at least one relay that supports the NTor circuit extension
22654 handshake. Otherwise, there is a chance that we're building
22655 a circuit that's worth attacking by an adversary who finds
22656 breaking 1024-bit crypto doable, and that chance changes the game
22657 theory. Implements ticket 9777.
22658 - Clients now look at the "usecreatefast" consensus parameter to
22659 decide whether to use CREATE_FAST or CREATE cells for the first hop
22660 of their circuit. This approach can improve security on connections
22661 where Tor's circuit handshake is stronger than the available TLS
22662 connection security levels, but the tradeoff is more computational
22663 load on guard relays. Implements proposal 221. Resolves ticket 9386.
22665 o Major features (bridges):
22666 - Don't launch pluggable transport proxies if we don't have any
22667 bridges configured that would use them. Now we can list many
22668 pluggable transports, and Tor will dynamically start one when it
22669 hears a bridge address that needs it. Resolves ticket 5018.
22670 - The bridge directory authority now assigns status flags (Stable,
22671 Guard, etc) to bridges based on thresholds calculated over all
22672 Running bridges. Now bridgedb can finally make use of its features
22673 to e.g. include at least one Stable bridge in its answers. Fixes
22676 o Major features (other):
22677 - Extend ORCONN controller event to include an "ID" parameter,
22678 and add four new controller event types CONN_BW, CIRC_BW,
22679 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
22680 The new events are emitted in private Tor networks only, with the
22681 goal of being able to better track performance and load during
22682 full-network simulations. Implements proposal 218 and ticket 7359.
22683 - On some platforms (currently: recent OSX versions, glibc-based
22684 platforms that support the ELF format, and a few other
22685 Unix-like operating systems), Tor can now dump stack traces
22686 when a crash occurs or an assertion fails. By default, traces
22687 are dumped to stderr (if possible) and to any logs that are
22688 reporting errors. Implements ticket 9299.
22691 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
22692 not entirely remove it from the connection lists. Fixes bug 9602;
22693 bugfix on 0.2.4.4-alpha.
22694 - Do not treat streams that fail with reason
22695 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
22696 since it could also indicate an ENETUNREACH connection error. Fixes
22697 part of bug 10777; bugfix on 0.2.4.8-alpha.
22699 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
22700 - Do not allow OpenSSL engines to replace the PRNG, even when
22701 HardwareAccel is set. The only default builtin PRNG engine uses
22702 the Intel RDRAND instruction to replace the entire PRNG, and
22703 ignores all attempts to seed it with more entropy. That's
22704 cryptographically stupid: the right response to a new alleged
22705 entropy source is never to discard all previously used entropy
22706 sources. Fixes bug 10402; works around behavior introduced in
22707 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
22709 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
22710 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
22711 - Avoid launching spurious extra circuits when a stream is pending.
22712 This fixes a bug where any circuit that _wasn't_ unusable for new
22713 streams would be treated as if it were, causing extra circuits to
22714 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
22716 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22717 - No longer stop reading or writing on cpuworker connections when
22718 our rate limiting buckets go empty. Now we should handle circuit
22719 handshake requests more promptly. Resolves bug 9731.
22720 - Stop trying to bootstrap all our directory information from
22721 only our first guard. Discovered while fixing bug 9946; bugfix
22724 o Minor features (bridges, pluggable transports):
22725 - Add threshold cutoffs to the networkstatus document created by
22726 the Bridge Authority. Fixes bug 1117.
22727 - On Windows, spawn background processes using the CREATE_NO_WINDOW
22728 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
22729 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
22730 Vidalia set this option for us.) Implements ticket 10297.
22732 o Minor features (security):
22733 - Always clear OpenSSL bignums before freeing them -- even bignums
22734 that don't contain secrets. Resolves ticket 10793. Patch by
22737 o Minor features (config options and command line):
22738 - Add an --allow-missing-torrc commandline option that tells Tor to
22739 run even if the configuration file specified by -f is not available.
22740 Implements ticket 10060.
22741 - Add support for the TPROXY transparent proxying facility on Linux.
22742 See documentation for the new TransProxyType option for more
22743 details. Implementation by "thomo". Closes ticket 10582.
22745 o Minor features (controller):
22746 - Add a new "HS_DESC" controller event that reports activities
22747 related to hidden service descriptors. Resolves ticket 8510.
22748 - New "DROPGUARDS" controller command to forget all current entry
22749 guards. Not recommended for ordinary use, since replacing guards
22750 too frequently makes several attacks easier. Resolves ticket 9934;
22753 o Minor features (build):
22754 - Assume that a user using ./configure --host wants to cross-compile,
22755 and give an error if we cannot find a properly named
22756 tool-chain. Add a --disable-tool-name-check option to proceed
22757 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
22758 - If we run ./configure and the compiler recognizes -fstack-protector
22759 but the linker rejects it, warn the user about a potentially missing
22760 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
22762 o Minor features (testing):
22763 - If Python is installed, "make check" now runs extra tests beyond
22764 the unit test scripts.
22765 - When bootstrapping a test network, sometimes very few relays get
22766 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
22767 specify a set of relays which should be voted Guard regardless of
22768 their uptime or bandwidth. Addresses ticket 9206.
22770 o Minor features (log messages):
22771 - When ServerTransportPlugin is set on a bridge, Tor can write more
22772 useful statistics about bridge use in its extrainfo descriptors,
22773 but only if the Extended ORPort ("ExtORPort") is set too. Add a
22774 log message to inform the user in this case. Resolves ticket 9651.
22775 - When receiving a new controller connection, log the origin address.
22776 Resolves ticket 9698; patch from "sigpipe".
22777 - When logging OpenSSL engine status at startup, log the status of
22778 more engines. Fixes ticket 10043; patch from Joshua Datko.
22779 - Turn "circuit handshake stats since last time" log messages into a
22780 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
22782 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22783 - Improve the circuit queue out-of-memory handler. Previously, when
22784 we ran low on memory, we'd close whichever circuits had the most
22785 queued cells. Now, we close those that have the *oldest* queued
22786 cells, on the theory that those are most responsible for us
22787 running low on memory. Based on analysis from a forthcoming paper
22788 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
22789 - Generate bootstrapping status update events correctly when fetching
22790 microdescriptors. Fixes bug 9927.
22791 - Update to the October 2 2013 Maxmind GeoLite Country database.
22793 o Minor bugfixes (clients):
22794 - When closing a channel that has already been open, do not close
22795 pending circuits that were waiting to connect to the same relay.
22796 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
22799 o Minor bugfixes (relays):
22800 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
22801 exit node as a NOROUTE error, not an INTERNAL error, since they
22802 can apparently happen when trying to connect to the wrong sort
22803 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
22805 o Minor bugfixes (bridges):
22806 - Fix a bug where the first connection works to a bridge that uses a
22807 pluggable transport with client-side parameters, but we don't send
22808 the client-side parameters on subsequent connections. (We don't
22809 use any pluggable transports with client-side parameters yet,
22810 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
22811 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
22813 o Minor bugfixes (node selection):
22814 - If ExcludeNodes is set, consider non-excluded hidden service
22815 directory servers before excluded ones. Do not consider excluded
22816 hidden service directory servers at all if StrictNodes is
22817 set. (Previously, we would sometimes decide to connect to those
22818 servers, and then realize before we initiated a connection that
22819 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
22820 Reported by "mr-4".
22821 - If we set the ExitNodes option but it doesn't include any nodes
22822 that have the Exit flag, we would choose not to bootstrap. Now we
22823 bootstrap so long as ExitNodes includes nodes which can exit to
22824 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
22826 o Minor bugfixes (controller and command-line):
22827 - If changing a config option via "setconf" fails in a recoverable
22828 way, we used to nonetheless write our new control ports to the
22829 file described by the "ControlPortWriteToFile" option. Now we only
22830 write out that file if we successfully switch to the new config
22831 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
22832 - When a command-line option such as --version or --help that
22833 ordinarily implies --hush appears on the command line along with
22834 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
22835 only if it appeared later on the command line. Fixes bug 9578;
22836 bugfix on 0.2.5.1-alpha.
22838 o Minor bugfixes (code correctness):
22839 - Previously we used two temporary files when writing descriptors to
22840 disk; now we only use one. Fixes bug 1376.
22841 - Remove an erroneous (but impossible and thus harmless) pointer
22842 comparison that would have allowed compilers to skip a bounds
22843 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
22844 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
22845 - Fix an always-true assertion in pluggable transports code so it
22846 actually checks what it was trying to check. Fixes bug 10046;
22847 bugfix on 0.2.3.9-alpha. Found by "dcb".
22849 o Minor bugfixes (protocol correctness):
22850 - When receiving a VERSIONS cell with an odd number of bytes, close
22851 the connection immediately since the cell is malformed. Fixes bug
22852 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
22855 o Minor bugfixes (build):
22856 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
22857 turned off (that is, without support for v2 link handshakes). Fixes
22858 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
22859 - Fix compilation warnings and startup issues when running with
22860 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
22862 - Fix compilation on Solaris 9, which didn't like us having an
22863 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
22865 o Minor bugfixes (testing):
22866 - Fix a segmentation fault in our benchmark code when running with
22867 Fedora's OpenSSL package, or any other OpenSSL that provides
22868 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
22870 o Minor bugfixes (log messages):
22871 - Fix a bug where clients using bridges would report themselves
22872 as 50% bootstrapped even without a live consensus document.
22873 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
22874 - Suppress a warning where, if there's only one directory authority
22875 in the network, we would complain that votes and signatures cannot
22876 be uploaded to other directory authorities. Fixes bug 10842;
22877 bugfix on 0.2.2.26-beta.
22878 - Report bootstrapping progress correctly when we're downloading
22879 microdescriptors. We had updated our "do we have enough microdescs
22880 to begin building circuits?" logic most recently in 0.2.4.10-alpha
22881 (see bug 5956), but we left the bootstrap status event logic at
22882 "how far through getting 1/4 of them are we?" Fixes bug 9958;
22883 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
22885 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
22886 - Avoid a crash bug when starting with a corrupted microdescriptor
22887 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
22888 - If we fail to dump a previously cached microdescriptor to disk, avoid
22889 freeing duplicate data later on. Fixes bug 10423; bugfix on
22890 0.2.4.13-alpha. Spotted by "bobnomnom".
22892 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22893 - Correctly log long IPv6 exit policies, instead of truncating them
22894 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
22895 - Our default TLS ecdhe groups were backwards: we meant to be using
22896 P224 for relays (for performance win) and P256 for bridges (since
22897 it is more common in the wild). Instead we had it backwards. After
22898 reconsideration, we decided that the default should be P256 on all
22899 hosts, since its security is probably better, and since P224 is
22900 reportedly used quite little in the wild. Found by "skruffy" on
22901 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
22902 - Free directory authority certificate download statuses on exit
22903 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
22905 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22906 - If the guard we choose first doesn't answer, we would try the
22907 second guard, but once we connected to the second guard we would
22908 abandon it and retry the first one, slowing down bootstrapping.
22909 The fix is to treat all our initially chosen guards as acceptable
22910 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
22911 - Fix an assertion failure that would occur when disabling the
22912 ORPort setting on a running Tor process while accounting was
22913 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
22914 - When examining the list of network interfaces to find our address,
22915 do not consider non-running or disabled network interfaces. Fixes
22916 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
22917 - Avoid an off-by-one error when checking buffer boundaries when
22918 formatting the exit status of a pluggable transport helper.
22919 This is probably not an exploitable bug, but better safe than
22920 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
22923 o Removed code and features:
22924 - Clients now reject any directory authority certificates lacking
22925 a dir-key-crosscert element. These have been included since
22926 0.2.1.9-alpha, so there's no real reason for them to be optional
22927 any longer. Completes proposal 157. Resolves ticket 10162.
22928 - Remove all code that existed to support the v2 directory system,
22929 since there are no longer any v2 directory authorities. Resolves
22931 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
22932 options, which were used for designating authorities as "Hidden
22933 service authorities". There has been no use of hidden service
22934 authorities since 0.2.2.1-alpha, when we stopped uploading or
22935 downloading v0 hidden service descriptors. Fixes bug 10881; also
22936 part of a fix for bug 10841.
22938 o Code simplification and refactoring:
22939 - Remove some old fallback code designed to keep Tor clients working
22940 in a network with only two working relays. Elsewhere in the code we
22941 have long since stopped supporting such networks, so there wasn't
22942 much point in keeping it around. Addresses ticket 9926.
22943 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
22944 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
22945 - Remove data structures which were introduced to implement the
22946 CellStatistics option: they are now redundant with the addition
22947 of a timestamp to the regular packed_cell_t data structure, which
22948 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
22951 o Documentation (man page) fixes:
22952 - Update manpage to describe some of the files you can expect to
22953 find in Tor's DataDirectory. Addresses ticket 9839.
22954 - Document that all but one DirPort entry must have the NoAdvertise
22955 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
22957 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22958 - Clarify the usage and risks of setting the ContactInfo torrc line
22959 for your relay or bridge. Resolves ticket 9854.
22960 - Add anchors to the manpage so we can link to the html version of
22961 the documentation for specific options. Resolves ticket 9866.
22962 - Replace remaining references to DirServer in man page and
22963 log entries. Resolves ticket 10124.
22966 - Make the "tor-gencert" tool used by directory authority operators
22967 create 2048-bit signing keys by default (rather than 1024-bit, since
22968 1024-bit is uncomfortably small these days). Addresses ticket 10324.
22971 Changes in version 0.2.4.20 - 2013-12-22
22972 Tor 0.2.4.20 fixes potentially poor random number generation for users
22973 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
22974 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
22975 and 4) have no state file in their DataDirectory (as would happen on
22976 first start). Users who generated relay or hidden service identity
22977 keys in such a situation should discard them and generate new ones.
22979 This release also fixes a logic error that caused Tor clients to build
22980 many more preemptive circuits than they actually need.
22983 - Do not allow OpenSSL engines to replace the PRNG, even when
22984 HardwareAccel is set. The only default builtin PRNG engine uses
22985 the Intel RDRAND instruction to replace the entire PRNG, and
22986 ignores all attempts to seed it with more entropy. That's
22987 cryptographically stupid: the right response to a new alleged
22988 entropy source is never to discard all previously used entropy
22989 sources. Fixes bug 10402; works around behavior introduced in
22990 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
22992 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
22993 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
22994 - Avoid launching spurious extra circuits when a stream is pending.
22995 This fixes a bug where any circuit that _wasn't_ unusable for new
22996 streams would be treated as if it were, causing extra circuits to
22997 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
23000 - Avoid a crash bug when starting with a corrupted microdescriptor
23001 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
23002 - If we fail to dump a previously cached microdescriptor to disk, avoid
23003 freeing duplicate data later on. Fixes bug 10423; bugfix on
23004 0.2.4.13-alpha. Spotted by "bobnomnom".
23007 Changes in version 0.2.4.19 - 2013-12-11
23008 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
23009 (1986-2013). Aaron worked on diverse projects including helping to guide
23010 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
23011 transparency to the U.S government's PACER documents, and contributing
23012 design and development for Tor and Tor2Web. Aaron was one of the latest
23013 martyrs in our collective fight for civil liberties and human rights,
23014 and his death is all the more painful because he was one of us.
23016 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
23017 a new circuit handshake and link encryption that use ECC to provide
23018 better security and efficiency; makes relays better manage circuit
23019 creation requests; uses "directory guards" to reduce client enumeration
23020 risks; makes bridges collect and report statistics about the pluggable
23021 transports they support; cleans up and improves our geoip database;
23022 gets much closer to IPv6 support for clients, bridges, and relays; makes
23023 directory authorities use measured bandwidths rather than advertised
23024 ones when computing flags and thresholds; disables client-side DNS
23025 caching to reduce tracking risks; and fixes a big bug in bridge
23026 reachability testing. This release introduces two new design
23027 abstractions in the code: a new "channel" abstraction between circuits
23028 and or_connections to allow for implementing alternate relay-to-relay
23029 transports, and a new "circuitmux" abstraction storing the queue of
23030 circuits for a channel. The release also includes many stability,
23031 security, and privacy fixes.
23034 Changes in version 0.2.4.18-rc - 2013-11-16
23035 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
23036 series. It takes a variety of fixes from the 0.2.5.x branch to improve
23037 stability, performance, and better handling of edge cases.
23040 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23041 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23042 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23043 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23044 them to solve bug 6033.)
23047 - No longer stop reading or writing on cpuworker connections when
23048 our rate limiting buckets go empty. Now we should handle circuit
23049 handshake requests more promptly. Resolves bug 9731.
23050 - If we are unable to save a microdescriptor to the journal, do not
23051 drop it from memory and then reattempt downloading it. Fixes bug
23052 9645; bugfix on 0.2.2.6-alpha.
23053 - Stop trying to bootstrap all our directory information from
23054 only our first guard. Discovered while fixing bug 9946; bugfix
23056 - The new channel code sometimes lost track of in-progress circuits,
23057 causing long-running clients to stop building new circuits. The
23058 fix is to always call circuit_n_chan_done(chan, 0) from
23059 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23061 o Minor bugfixes (on 0.2.4.x):
23062 - Correctly log long IPv6 exit policies, instead of truncating them
23063 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
23064 - Our default TLS ecdhe groups were backwards: we meant to be using
23065 P224 for relays (for performance win) and P256 for bridges (since
23066 it is more common in the wild). Instead we had it backwards. After
23067 reconsideration, we decided that the default should be P256 on all
23068 hosts, since its security is probably better, and since P224 is
23069 reportedly used quite little in the wild. Found by "skruffy" on
23070 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
23071 - Free directory authority certificate download statuses on exit
23072 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
23074 o Minor bugfixes (on 0.2.3.x and earlier):
23075 - If the guard we choose first doesn't answer, we would try the
23076 second guard, but once we connected to the second guard we would
23077 abandon it and retry the first one, slowing down bootstrapping.
23078 The fix is to treat all our initially chosen guards as acceptable
23079 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
23080 - Fix an assertion failure that would occur when disabling the
23081 ORPort setting on a running Tor process while accounting was
23082 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
23083 - When examining the list of network interfaces to find our address,
23084 do not consider non-running or disabled network interfaces. Fixes
23085 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
23086 - Avoid an off-by-one error when checking buffer boundaries when
23087 formatting the exit status of a pluggable transport helper.
23088 This is probably not an exploitable bug, but better safe than
23089 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
23092 o Minor features (protecting client timestamps):
23093 - Clients no longer send timestamps in their NETINFO cells. These were
23094 not used for anything, and they provided one small way for clients
23095 to be distinguished from each other as they moved from network to
23096 network or behind NAT. Implements part of proposal 222.
23097 - Clients now round timestamps in INTRODUCE cells down to the nearest
23098 10 minutes. If a new Support022HiddenServices option is set to 0, or
23099 if it's set to "auto" and the feature is disabled in the consensus,
23100 the timestamp is sent as 0 instead. Implements part of proposal 222.
23101 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23102 a big deal from a security point of view, but it achieves no actual
23103 good purpose, and isn't needed. Implements part of proposal 222.
23104 - Reduce down accuracy of timestamps in hidden service descriptors.
23105 Implements part of proposal 222.
23107 o Minor features (other):
23108 - Improve the circuit queue out-of-memory handler. Previously, when
23109 we ran low on memory, we'd close whichever circuits had the most
23110 queued cells. Now, we close those that have the *oldest* queued
23111 cells, on the theory that those are most responsible for us
23112 running low on memory. Based on analysis from a forthcoming paper
23113 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
23114 - Generate bootstrapping status update events correctly when fetching
23115 microdescriptors. Fixes bug 9927.
23116 - Update to the October 2 2013 Maxmind GeoLite Country database.
23118 o Documentation fixes:
23119 - Clarify the usage and risks of setting the ContactInfo torrc line
23120 for your relay or bridge. Resolves ticket 9854.
23121 - Add anchors to the manpage so we can link to the html version of
23122 the documentation for specific options. Resolves ticket 9866.
23123 - Replace remaining references to DirServer in man page and
23124 log entries. Resolves ticket 10124.
23127 Changes in version 0.2.5.1-alpha - 2013-10-02
23128 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
23129 on Linux, allows bridges that offer pluggable transports to report usage
23130 statistics, fixes many issues to make testing easier, and provides
23131 a pile of minor features and bugfixes that have been waiting for a
23132 release of the new branch.
23134 This is the first alpha release in a new series, so expect there to
23135 be bugs. Users who would rather test out a more stable branch should
23136 stay with 0.2.4.x for now.
23138 o Major features (security):
23139 - Use the seccomp2 syscall filtering facility on Linux to limit
23140 which system calls Tor can invoke. This is an experimental,
23141 Linux-only feature to provide defense-in-depth against unknown
23142 attacks. To try turning it on, set "Sandbox 1" in your torrc
23143 file. Please be ready to report bugs. We hope to add support
23144 for better sandboxing in the future, including more fine-grained
23145 filters, better division of responsibility, and support for more
23146 platforms. This work has been done by Cristian-Matei Toader for
23147 Google Summer of Code.
23148 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
23149 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
23150 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
23151 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
23152 them to solve bug 6033.)
23154 o Major features (other):
23155 - Add support for passing arguments to managed pluggable transport
23156 proxies. Implements ticket 3594.
23157 - Bridges now track GeoIP information and the number of their users
23158 even when pluggable transports are in use, and report usage
23159 statistics in their extra-info descriptors. Resolves tickets 4773
23161 - Make testing Tor networks bootstrap better: lower directory fetch
23162 retry schedules and maximum interval without directory requests,
23163 and raise maximum download tries. Implements ticket 6752.
23164 - Add make target 'test-network' to run tests on a Chutney network.
23165 Implements ticket 8530.
23166 - The ntor handshake is now on-by-default, no matter what the
23167 directory authorities recommend. Implements ticket 8561.
23170 - Instead of writing destroy cells directly to outgoing connection
23171 buffers, queue them and intersperse them with other outgoing cells.
23172 This can prevent a set of resource starvation conditions where too
23173 many pending destroy cells prevent data cells from actually getting
23174 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
23175 bugfix on 0.2.0.1-alpha.
23176 - If we are unable to save a microdescriptor to the journal, do not
23177 drop it from memory and then reattempt downloading it. Fixes bug
23178 9645; bugfix on 0.2.2.6-alpha.
23179 - The new channel code sometimes lost track of in-progress circuits,
23180 causing long-running clients to stop building new circuits. The
23181 fix is to always call circuit_n_chan_done(chan, 0) from
23182 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
23185 - Tor now builds each source file in two modes: a mode that avoids
23186 exposing identifiers needlessly, and another mode that exposes
23187 more identifiers for testing. This lets the compiler do better at
23188 optimizing the production code, while enabling us to take more
23189 radical measures to let the unit tests test things.
23190 - The production builds no longer include functions used only in
23191 the unit tests; all functions exposed from a module only for
23192 unit-testing are now static in production builds.
23193 - Add an --enable-coverage configuration option to make the unit
23194 tests (and a new src/or/tor-cov target) to build with gcov test
23198 - We now have rudimentary function mocking support that our unit
23199 tests can use to test functions in isolation. Function mocking
23200 lets the tests temporarily replace a function's dependencies with
23201 stub functions, so that the tests can check the function without
23202 invoking the other functions it calls.
23203 - Add more unit tests for the <circid,channel>->circuit map, and
23204 the destroy-cell-tracking code to fix bug 7912.
23205 - Unit tests for failing cases of the TAP onion handshake.
23206 - More unit tests for address-manipulation functions.
23208 o Minor features (protecting client timestamps):
23209 - Clients no longer send timestamps in their NETINFO cells. These were
23210 not used for anything, and they provided one small way for clients
23211 to be distinguished from each other as they moved from network to
23212 network or behind NAT. Implements part of proposal 222.
23213 - Clients now round timestamps in INTRODUCE cells down to the nearest
23214 10 minutes. If a new Support022HiddenServices option is set to 0, or
23215 if it's set to "auto" and the feature is disabled in the consensus,
23216 the timestamp is sent as 0 instead. Implements part of proposal 222.
23217 - Stop sending timestamps in AUTHENTICATE cells. This is not such
23218 a big deal from a security point of view, but it achieves no actual
23219 good purpose, and isn't needed. Implements part of proposal 222.
23220 - Reduce down accuracy of timestamps in hidden service descriptors.
23221 Implements part of proposal 222.
23223 o Minor features (config options):
23224 - Config (torrc) lines now handle fingerprints which are missing
23225 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
23226 - Support a --dump-config option to print some or all of the
23227 configured options. Mainly useful for debugging the command-line
23228 option parsing code. Helps resolve ticket 4647.
23229 - Raise awareness of safer logging: notify user of potentially
23230 unsafe config options, like logging more verbosely than severity
23231 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
23232 - Add a new configuration option TestingV3AuthVotingStartOffset
23233 that bootstraps a network faster by changing the timing for
23234 consensus votes. Addresses ticket 8532.
23235 - Add a new torrc option "ServerTransportOptions" that allows
23236 bridge operators to pass configuration parameters to their
23237 pluggable transports. Resolves ticket 8929.
23238 - The config (torrc) file now accepts bandwidth and space limits in
23239 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
23240 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
23243 o Minor features (build):
23244 - Add support for `--library-versions` flag. Implements ticket 6384.
23245 - Return the "unexpected sendme" warnings to a warn severity, but make
23246 them rate limited, to help diagnose ticket 8093.
23247 - Detect a missing asciidoc, and warn the user about it, during
23248 configure rather than at build time. Fixes issue 6506. Patch from
23251 o Minor features (other):
23252 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
23253 sockets in a single system call. Implements ticket 5129.
23254 - Log current accounting state (bytes sent and received + remaining
23255 time for the current accounting period) in the relay's heartbeat
23256 message. Implements ticket 5526; patch from Peter Retzlaff.
23257 - Implement the TRANSPORT_LAUNCHED control port event that
23258 notifies controllers about new launched pluggable
23259 transports. Resolves ticket 5609.
23260 - If we're using the pure-C 32-bit curve25519_donna implementation
23261 of curve25519, build it with the -fomit-frame-pointer option to
23262 make it go faster on register-starved hosts. This improves our
23263 handshake performance by about 6% on i386 hosts without nacl.
23264 Closes ticket 8109.
23265 - Update to the September 4 2013 Maxmind GeoLite Country database.
23268 - Set the listen() backlog limit to the largest actually supported
23269 on the system, not to the value in a header file. Fixes bug 9716;
23270 bugfix on every released Tor.
23271 - No longer accept malformed http headers when parsing urls from
23272 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
23273 bugfix on 0.0.6pre1.
23274 - In munge_extrainfo_into_routerinfo(), check the return value of
23275 memchr(). This would have been a serious issue if we ever passed
23276 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
23278 - On the chance that somebody manages to build Tor on a
23279 platform where time_t is unsigned, correct the way that
23280 microdesc_add_to_cache() handles negative time arguments.
23281 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
23282 - Reject relative control socket paths and emit a warning. Previously,
23283 single-component control socket paths would be rejected, but Tor
23284 would not log why it could not validate the config. Fixes bug 9258;
23285 bugfix on 0.2.3.16-alpha.
23287 o Minor bugfixes (command line):
23288 - Use a single command-line parser for parsing torrc options on the
23289 command line and for finding special command-line options to avoid
23290 inconsistent behavior for torrc option arguments that have the same
23291 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
23293 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
23294 9573; bugfix on 0.0.9pre5.
23296 o Minor fixes (build, auxiliary programs):
23297 - Stop preprocessing the "torify" script with autoconf, since
23298 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
23300 - The tor-fw-helper program now follows the standard convention and
23301 exits with status code "0" on success. Fixes bug 9030; bugfix on
23302 0.2.3.1-alpha. Patch by Arlo Breault.
23303 - Corrected ./configure advice for what openssl dev package you should
23304 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
23306 o Minor code improvements:
23307 - Remove constants and tests for PKCS1 padding; it's insecure and
23308 shouldn't be used for anything new. Fixes bug 8792; patch
23310 - Remove instances of strcpy() from the unit tests. They weren't
23311 hurting anything, since they were only in the unit tests, but it's
23312 embarrassing to have strcpy() in the code at all, and some analysis
23313 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
23314 0.2.3.8-alpha. Patch from Arlo Breault.
23316 o Removed features:
23317 - Remove migration code from when we renamed the "cached-routers"
23318 file to "cached-descriptors" back in 0.2.0.8-alpha. This
23319 incidentally resolves ticket 6502 by cleaning up the related code
23320 a bit. Patch from Akshay Hebbar.
23322 o Code simplification and refactoring:
23323 - Extract the common duplicated code for creating a subdirectory
23324 of the data directory and writing to a file in it. Fixes ticket
23325 4282; patch from Peter Retzlaff.
23326 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
23327 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
23328 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
23329 - Add a set of accessor functions for the circuit timeout data
23330 structure. Fixes ticket 6153; patch from "piet".
23331 - Clean up exit paths from connection_listener_new(). Closes ticket
23332 8789. Patch from Arlo Breault.
23333 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
23334 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
23335 - Use a doubly-linked list to implement the global circuit list.
23336 Resolves ticket 9108. Patch from Marek Majkowski.
23337 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
23340 Changes in version 0.2.4.17-rc - 2013-09-05
23341 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
23342 series. It adds an emergency step to help us tolerate the massive
23343 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
23344 circuit-level handshakes now effectively jump the queue compared to
23345 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
23346 big bug hindering bridge reachability tests.
23349 - Relays now process the new "NTor" circuit-level handshake requests
23350 with higher priority than the old "TAP" circuit-level handshake
23351 requests. We still process some TAP requests to not totally starve
23352 0.2.3 clients when NTor becomes popular. A new consensus parameter
23353 "NumNTorsPerTAP" lets us tune the balance later if we need to.
23354 Implements ticket 9574.
23357 - If the circuit build timeout logic is disabled (via the consensus,
23358 or because we are an authority), then don't build testing circuits.
23359 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
23360 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
23361 previously they did not, which prevented them from receiving
23362 successful connections from relays for self-test or bandwidth
23363 testing. Also, when a relay is extending a circuit to a bridge,
23364 it needs to send a NETINFO cell, even when the bridge hasn't sent
23365 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
23366 - If the time to download the next old-style networkstatus is in
23367 the future, do not decline to consider whether to download the
23368 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
23372 - Avoid double-closing the listener socket in our socketpair()
23373 replacement (used on Windows) in the case where the addresses on
23374 our opened sockets don't match what we expected. Fixes bug 9400;
23375 bugfix on 0.0.2pre7. Found by Coverity.
23377 o Minor fixes (config options):
23378 - Avoid overflows when the user sets MaxCircuitDirtiness to a
23379 ridiculously high value, by imposing a (ridiculously high) 30-day
23380 maximum on MaxCircuitDirtiness.
23381 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
23382 message is logged at notice, not at info.
23383 - Warn and fail if a server is configured not to advertise any
23384 ORPorts at all. (We need *something* to put in our descriptor,
23385 or we just won't work.)
23388 - Track how many "TAP" and "NTor" circuit handshake requests we get,
23389 and how many we complete, and log it every hour to help relay
23390 operators follow trends in network load. Addresses ticket 9658.
23391 - Update to the August 7 2013 Maxmind GeoLite Country database.
23394 Changes in version 0.2.4.16-rc - 2013-08-10
23395 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
23396 series. It fixes several crash bugs in the 0.2.4 branch.
23399 - Fix a bug in the voting algorithm that could yield incorrect results
23400 when a non-naming authority declared too many flags. Fixes bug 9200;
23401 bugfix on 0.2.0.3-alpha.
23402 - Fix an uninitialized read that could in some cases lead to a remote
23403 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
23404 Anybody running a hidden service on the experimental 0.2.4.x
23405 branch should upgrade. (This is, so far as we know, unrelated to
23407 - Avoid an assertion failure when processing DNS replies without the
23408 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
23409 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
23410 0.2.4.15-rc. Found by stem integration tests.
23413 - Fix an invalid memory read that occurred when a pluggable
23414 transport proxy failed its configuration protocol.
23415 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
23416 - When evaluating whether to use a connection that we haven't
23417 decided is canonical using a recent link protocol version,
23418 decide that it's canonical only if it used address _does_
23419 match the desired address. Fixes bug 9309; bugfix on
23420 0.2.4.4-alpha. Reported by skruffy.
23421 - Make the default behavior of NumDirectoryGuards be to track
23422 NumEntryGuards. Now a user who changes only NumEntryGuards will get
23423 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
23424 - Fix a spurious compilation warning with some older versions of
23425 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
23428 - Update to the July 3 2013 Maxmind GeoLite Country database.
23431 Changes in version 0.2.4.15-rc - 2013-07-01
23432 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
23433 series. It fixes a few smaller bugs, but generally appears stable.
23434 Please test it and let us know whether it is!
23437 - When receiving a new configuration file via the control port's
23438 LOADCONF command, do not treat the defaults file as absent.
23439 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
23442 - Issue a warning when running with the bufferevents backend enabled.
23443 It's still not stable, and people should know that they're likely
23444 to hit unexpected problems. Closes ticket 9147.
23447 Changes in version 0.2.4.14-alpha - 2013-06-18
23448 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
23449 present in 0.2.4.13-alpha.
23452 - When we have too much memory queued in circuits (according to a new
23453 MaxMemInCellQueues option), close the circuits consuming the most
23454 memory. This prevents us from running out of memory as a relay if
23455 circuits fill up faster than they can be drained. Fixes bug 9063;
23456 bugfix on the 54th commit of Tor. This bug is a further fix beyond
23457 bug 6252, whose fix was merged into 0.2.3.21-rc.
23459 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
23460 where we tried to solve this issue simply by imposing an upper limit
23461 on the number of queued cells for a single circuit. That approach
23462 proved to be problematic, since there are ways to provoke clients to
23463 send a number of cells in excess of any such reasonable limit. Fixes
23464 bug 9072; bugfix on 0.2.4.13-alpha.
23466 - Limit hidden service descriptors to at most ten introduction
23467 points, to slow one kind of guard enumeration. Fixes bug 9002;
23468 bugfix on 0.1.1.11-alpha.
23471 Changes in version 0.2.4.13-alpha - 2013-06-14
23472 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
23473 vulnerabilities, makes socks5 username/password circuit isolation
23474 actually actually work (this time for sure!), and cleans up a bunch
23475 of other issues in preparation for a release candidate.
23477 o Major bugfixes (robustness):
23478 - Close any circuit that has too many cells queued on it. Fixes
23479 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
23480 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
23481 - Prevent the get_freelists() function from running off the end of
23482 the list of freelists if it somehow gets an unrecognized
23483 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
23485 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
23486 when an exit connection with optimistic data succeeds immediately
23487 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
23489 - Fix a directory authority crash bug when building a consensus
23490 using an older consensus as its basis. Fixes bug 8833. Bugfix
23494 - Avoid a memory leak where we would leak a consensus body when we
23495 find that a consensus which we couldn't previously verify due to
23496 missing certificates is now verifiable. Fixes bug 8719; bugfix
23498 - We used to always request authority certificates by identity digest,
23499 meaning we'd get the newest one even when we wanted one with a
23500 different signing key. Then we would complain about being given
23501 a certificate we already had, and never get the one we really
23502 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
23503 resource to request the one we want. Fixes bug 5595; bugfix on
23505 - Follow the socks5 protocol when offering username/password
23506 authentication. The fix for bug 8117 exposed this bug, and it
23507 turns out real-world applications like Pidgin do care. Bugfix on
23508 0.2.3.2-alpha; fixes bug 8879.
23509 - Prevent failures on Windows Vista and later when rebuilding the
23510 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
23511 bugfix on 0.2.4.12-alpha.
23514 - Fix an impossible buffer overrun in the AES unit tests. Fixes
23515 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
23516 - If for some reason we fail to write a microdescriptor while
23517 rebuilding the cache, do not let the annotations from that
23518 microdescriptor linger in the cache file, and do not let the
23519 microdescriptor stay recorded as present in its old location.
23520 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
23521 - Fix a memory leak that would occur whenever a configuration
23522 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
23523 - Paste the description for PathBias parameters from the man
23524 page into or.h, so the code documents them too. Fixes bug 7982;
23525 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
23526 - Relays now treat a changed IPv6 ORPort as sufficient reason to
23527 publish an updated descriptor. Fixes bug 6026; bugfix on
23529 - When launching a resolve request on behalf of an AF_UNIX control
23530 socket, omit the address field of the new entry connection, used in
23531 subsequent controller events, rather than letting tor_dup_addr()
23532 set it to "<unknown address type>". Fixes bug 8639; bugfix on
23535 o Minor bugfixes (log messages):
23536 - Fix a scaling issue in the path bias accounting code that
23537 resulted in "Bug:" log messages from either
23538 pathbias_scale_close_rates() or pathbias_count_build_success().
23539 This represents a bugfix on a previous bugfix: the original fix
23540 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
23542 - Give a less useless error message when the user asks for an IPv4
23543 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
23547 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
23548 to tolerate bug 8093 for now.
23549 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
23550 in directory authority votes to describe whether they have enough
23551 measured bandwidths to ignore advertised (relay descriptor)
23552 bandwidth claims. Resolves ticket 8711.
23553 - Update to the June 5 2013 Maxmind GeoLite Country database.
23555 o Removed documentation:
23556 - Remove some of the older contents of doc/ as obsolete; move others
23557 to torspec.git. Fixes bug 8965.
23559 o Code simplification and refactoring:
23560 - Avoid using character buffers when constructing most directory
23561 objects: this approach was unwieldy and error-prone. Instead,
23562 build smartlists of strings, and concatenate them when done.
23565 Changes in version 0.2.4.12-alpha - 2013-04-18
23566 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
23567 process for lengthening the guard rotation period, makes directory
23568 authority opinions in the consensus a bit less gameable, makes socks5
23569 username/password circuit isolation actually work, and fixes a wide
23570 variety of other issues.
23573 - Raise the default time that a client keeps an entry guard from
23574 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
23575 2012 paper. (We would make it even longer, but we need better client
23576 load balancing first.) Also, make the guard lifetime controllable
23577 via a new GuardLifetime torrc option and a GuardLifetime consensus
23578 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
23579 - Directory authorities now prefer using measured bandwidths to
23580 advertised ones when computing flags and thresholds. Resolves
23582 - Directory authorities that have more than a threshold number
23583 of relays with measured bandwidths now treat relays with unmeasured
23584 bandwidths as having bandwidth 0. Resolves ticket 8435.
23586 o Major bugfixes (assert / resource use):
23587 - Avoid a bug where our response to TLS renegotiation under certain
23588 network conditions could lead to a busy-loop, with 100% CPU
23589 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
23590 - Avoid an assertion when we discover that we'd like to write a cell
23591 onto a closing connection: just discard the cell. Fixes another
23592 case of bug 7350; bugfix on 0.2.4.4-alpha.
23594 o Major bugfixes (client-side privacy):
23595 - When we mark a circuit as unusable for new circuits, have it
23596 continue to be unusable for new circuits even if MaxCircuitDirtiness
23597 is increased too much at the wrong time, or the system clock jumps
23598 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
23599 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
23600 which have resolved to internal addresses") is set, apply that
23601 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
23602 - When an exit relay rejects a stream with reason "exit policy", but
23603 we only know an exit policy summary (e.g. from the microdesc
23604 consensus) for it, do not mark the relay as useless for all exiting.
23605 Instead, mark just the circuit as unsuitable for that particular
23606 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
23607 - Allow applications to get proper stream isolation with
23608 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
23609 username/password authentication also offer "no authentication". Tor
23610 had previously preferred "no authentication", so the applications
23611 never actually sent Tor their auth details. Now Tor selects
23612 username/password authentication if it's offered. You can disable
23613 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
23614 bug 8117; bugfix on 0.2.3.3-alpha.
23616 o Major bugfixes (other):
23617 - When unable to find any working directory nodes to use as a
23618 directory guard, give up rather than adding the same non-working
23619 nodes to the directory guard list over and over. Fixes bug 8231;
23620 bugfix on 0.2.4.8-alpha.
23623 - Reject as invalid most directory objects containing a NUL.
23624 Belt-and-suspender fix for bug 8037.
23625 - In our testsuite, create temporary directories with a bit more
23626 entropy in their name to make name collisions less likely. Fixes
23628 - Add CACHED keyword to ADDRMAP events in the control protocol
23629 to indicate whether a DNS result will be cached or not. Resolves
23631 - Update to the April 3 2013 Maxmind GeoLite Country database.
23633 o Minor features (build):
23634 - Detect and reject attempts to build Tor with threading support
23635 when OpenSSL has been compiled without threading support.
23637 - Clarify that when autoconf is checking for nacl, it is checking
23638 specifically for nacl with a fast curve25519 implementation.
23640 - Warn if building on a platform with an unsigned time_t: there
23641 are too many places where Tor currently assumes that time_t can
23642 hold negative values. We'd like to fix them all, but probably
23645 o Minor bugfixes (build):
23646 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
23647 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
23648 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
23649 - Add the old src/or/micro-revision.i filename to CLEANFILES.
23650 On the off chance that somebody has one, it will go away as soon
23651 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
23652 - Build Tor correctly on 32-bit platforms where the compiler can build
23653 but not run code using the "uint128_t" construction. Fixes bug 8587;
23654 bugfix on 0.2.4.8-alpha.
23655 - Fix compilation warning with some versions of clang that would
23656 prefer the -Wswitch-enum compiler flag to warn about switch
23657 statements with missing enum values, even if those switch
23658 statements have a "default:" statement. Fixes bug 8598; bugfix
23661 o Minor bugfixes (protocol):
23662 - Fix the handling of a TRUNCATE cell when it arrives while the
23663 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
23664 - Fix a misframing issue when reading the version numbers in a
23665 VERSIONS cell. Previously we would recognize [00 01 00 02] as
23666 'version 1, version 2, and version 0x100', when it should have
23667 only included versions 1 and 2. Fixes bug 8059; bugfix on
23668 0.2.0.10-alpha. Reported pseudonymously.
23669 - Make the format and order of STREAM events for DNS lookups
23670 consistent among the various ways to launch DNS lookups. Fixes
23671 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
23672 - Correct our check for which versions of Tor support the EXTEND2
23673 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
23674 later, when support was really added in version 0.2.4.8-alpha.
23675 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
23677 o Minor bugfixes (other):
23678 - Correctly store microdescriptors and extrainfo descriptors with
23679 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
23680 Bug reported by "cypherpunks".
23681 - Increase the width of the field used to remember a connection's
23682 link protocol version to two bytes. Harmless for now, since the
23683 only currently recognized versions are one byte long. Reported
23684 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
23685 - If the state file's path bias counts are invalid (presumably from a
23686 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
23687 additional checks and log messages to the scaling of Path Bias
23688 counts, in case there still are remaining issues with scaling.
23689 Should help resolve bug 8235.
23690 - Eliminate several instances where we use "Nickname=ID" to refer to
23691 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
23692 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
23693 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
23695 o Minor bugfixes (syscalls):
23696 - Always check the return values of functions fcntl() and
23697 setsockopt(). We don't believe these are ever actually failing in
23698 practice, but better safe than sorry. Also, checking these return
23699 values should please analysis tools like Coverity. Patch from
23700 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
23701 - Use direct writes rather than stdio when building microdescriptor
23702 caches, in an attempt to mitigate bug 8031, or at least make it
23705 o Minor bugfixes (config):
23706 - When rejecting a configuration because we were unable to parse a
23707 quoted string, log an actual error message. Fixes bug 7950; bugfix
23709 - Behave correctly when the user disables LearnCircuitBuildTimeout
23710 but doesn't tell us what they would like the timeout to be. Fixes
23711 bug 6304; bugfix on 0.2.2.14-alpha.
23712 - When autodetecting the number of CPUs, use the number of available
23713 CPUs in preference to the number of configured CPUs. Inform the
23714 user if this reduces the number of available CPUs. Fixes bug 8002;
23715 bugfix on 0.2.3.1-alpha.
23716 - Make it an error when you set EntryNodes but disable UseGuardNodes,
23717 since it will (surprisingly to some users) ignore EntryNodes. Fixes
23718 bug 8180; bugfix on 0.2.3.11-alpha.
23719 - Allow TestingTorNetworks to override the 4096-byte minimum for
23720 the Fast threshold. Otherwise they can't bootstrap until they've
23721 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
23722 - Fix some logic errors when the user manually overrides the
23723 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
23726 o Minor bugfixes (log messages to help diagnose bugs):
23727 - If we fail to free a microdescriptor because of bug 7164, log
23728 the filename and line number from which we tried to free it.
23729 - Add another diagnostic to the heartbeat message: track and log
23730 overhead that TLS is adding to the data we write. If this is
23731 high, we are sending too little data to SSL_write at a time.
23732 Diagnostic for bug 7707.
23733 - Add more detail to a log message about relaxed timeouts, to help
23735 - Warn more aggressively when flushing microdescriptors to a
23736 microdescriptor cache fails, in an attempt to mitigate bug 8031,
23737 or at least make it more diagnosable.
23738 - Improve debugging output to help track down bug 8185 ("Bug:
23739 outgoing relay cell has n_chan==NULL. Dropping.")
23740 - Log the purpose of a path-bias testing circuit correctly.
23741 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
23743 o Minor bugfixes (0.2.4.x log messages that were too noisy):
23744 - Don't attempt to relax the timeout of already opened 1-hop circuits.
23745 They might never timeout. This should eliminate some/all cases of
23746 the relaxed timeout log message.
23747 - Use circuit creation time for network liveness evaluation. This
23748 should eliminate warning log messages about liveness caused
23749 by changes in timeout evaluation. Fixes bug 6572; bugfix on
23751 - Reduce a path bias length check from notice to info. The message
23752 is triggered when creating controller circuits. Fixes bug 8196;
23753 bugfix on 0.2.4.8-alpha.
23754 - Fix a path state issue that triggered a notice during relay startup.
23755 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
23756 - Reduce occurrences of warns about circuit purpose in
23757 connection_ap_expire_building(). Fixes bug 8477; bugfix on
23760 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
23761 - If we encounter a write failure on a SOCKS connection before we
23762 finish our SOCKS handshake, don't warn that we closed the
23763 connection before we could send a SOCKS reply. Fixes bug 8427;
23764 bugfix on 0.1.0.1-rc.
23765 - Correctly recognize that [::1] is a loopback address. Fixes
23766 bug 8377; bugfix on 0.2.1.3-alpha.
23767 - Fix a directory authority warn caused when we have a large amount
23768 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
23769 - Don't log inappropriate heartbeat messages when hibernating: a
23770 hibernating node is _expected_ to drop out of the consensus,
23771 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
23772 bugfix on 0.2.3.1-alpha.
23773 - Don't complain about bootstrapping problems while hibernating.
23774 These complaints reflect a general code problem, but not one
23775 with any problematic effects (no connections are actually
23776 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
23778 o Documentation fixes:
23779 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
23780 names match. Fixes bug 7768.
23781 - Make the torify manpage no longer refer to tsocks; torify hasn't
23782 supported tsocks since 0.2.3.14-alpha.
23783 - Make the tor manpage no longer reference tsocks.
23784 - Fix the GeoIPExcludeUnknown documentation to refer to
23785 ExcludeExitNodes rather than the currently nonexistent
23786 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
23789 - The tor-tsocks.conf is no longer distributed or installed. We
23790 recommend that tsocks users use torsocks instead. Resolves
23794 Changes in version 0.2.4.11-alpha - 2013-03-11
23795 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
23796 more robust, makes hidden service authentication work again, and
23797 resolves a DPI fingerprint for Tor's SSL transport.
23799 o Major features (directory authorities):
23800 - Directory authorities now support a new consensus method (17)
23801 where they cap the published bandwidth of servers for which
23802 insufficient bandwidth measurements exist. Fixes part of bug 2286.
23803 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
23804 serve any v2 directory information. Now we can test disabling the
23805 old deprecated v2 directory format, and see whether doing so has
23806 any effect on network load. Begins to fix bug 6783.
23807 - Directory authorities now include inside each vote a statement of
23808 the performance thresholds they used when assigning flags.
23809 Implements ticket 8151.
23811 o Major bugfixes (directory authorities):
23812 - Stop marking every relay as having been down for one hour every
23813 time we restart a directory authority. These artificial downtimes
23814 were messing with our Stable and Guard flag calculations. Fixes
23815 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
23817 o Major bugfixes (hidden services):
23818 - Allow hidden service authentication to succeed again. When we
23819 refactored the hidden service introduction code back
23820 in 0.2.4.1-alpha, we didn't update the code that checks
23821 whether authentication information is present, causing all
23822 authentication checks to return "false". Fix for bug 8207; bugfix
23823 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
23825 o Minor features (relays, bridges):
23826 - Make bridge relays check once a minute for whether their IP
23827 address has changed, rather than only every 15 minutes. Resolves
23828 bugs 1913 and 1992.
23829 - Refactor resolve_my_address() so it returns the method by which we
23830 decided our public IP address (explicitly configured, resolved from
23831 explicit hostname, guessed from interfaces, learned by gethostname).
23832 Now we can provide more helpful log messages when a relay guesses
23833 its IP address incorrectly (e.g. due to unexpected lines in
23834 /etc/hosts). Resolves ticket 2267.
23835 - Teach bridge-using clients to avoid 0.2.2 bridges when making
23836 microdescriptor-related dir requests, and only fall back to normal
23837 descriptors if none of their bridges can handle microdescriptors
23838 (as opposed to the fix in ticket 4013, which caused them to fall
23839 back to normal descriptors if *any* of their bridges preferred
23840 them). Resolves ticket 4994.
23841 - Randomize the lifetime of our SSL link certificate, so censors can't
23842 use the static value for filtering Tor flows. Resolves ticket 8443;
23843 related to ticket 4014 which was included in 0.2.2.33.
23844 - Support a new version of the link protocol that allows 4-byte circuit
23845 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
23846 a possible resource exhaustion issue. Closes ticket 7351; implements
23849 o Minor features (portability):
23850 - Tweak the curve25519-donna*.c implementations to tolerate systems
23851 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
23852 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
23853 the signs of types during autoconf. This is better than our old
23854 approach, which didn't work when cross-compiling.
23855 - Detect the sign of enum values, rather than assuming that MSC is the
23856 only compiler where enum types are all signed. Fixes bug 7727;
23857 bugfix on 0.2.4.10-alpha.
23859 o Minor features (other):
23860 - Say "KBytes" rather than "KB" in the man page (for various values
23861 of K), to further reduce confusion about whether Tor counts in
23862 units of memory or fractions of units of memory. Resolves ticket 7054.
23863 - Clear the high bit on curve25519 public keys before passing them to
23864 our backend, in case we ever wind up using a backend that doesn't do
23865 so itself. If we used such a backend, and *didn't* clear the high bit,
23866 we could wind up in a situation where users with such backends would
23867 be distinguishable from users without. Fixes bug 8121; bugfix on
23869 - Update to the March 6 2013 Maxmind GeoLite Country database.
23871 o Minor bugfixes (clients):
23872 - When we receive a RELAY_END cell with the reason DONE, or with no
23873 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
23874 status as "connection refused". Previously we reported these cases
23875 as success but then immediately closed the connection. Fixes bug
23876 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
23877 - Downgrade an assertion in connection_ap_expire_beginning to an
23878 LD_BUG message. The fix for bug 8024 should prevent this message
23879 from displaying, but just in case, a warn that we can diagnose
23880 is better than more assert crashes. Fixes bug 8065; bugfix on
23882 - Lower path use bias thresholds to .80 for notice and .60 for warn.
23883 Also make the rate limiting flags for the path use bias log messages
23884 independent from the original path bias flags. Fixes bug 8161;
23885 bugfix on 0.2.4.10-alpha.
23887 o Minor bugfixes (relays):
23888 - Stop trying to resolve our hostname so often (e.g. every time we
23889 think about doing a directory fetch). Now we reuse the cached
23890 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
23891 and 2410 (bugfix on 0.1.2.2-alpha).
23892 - Stop sending a stray "(null)" in some cases for the server status
23893 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
23895 - When choosing which stream on a formerly stalled circuit to wake
23896 first, make better use of the platform's weak RNG. Previously,
23897 we had been using the % ("modulo") operator to try to generate a
23898 1/N chance of picking each stream, but this behaves badly with
23899 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
23901 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
23902 Irix's random() only return 15 bits; Solaris's random() returns more
23903 bits but its RAND_MAX says it only returns 15, and so on. Motivated
23904 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
23906 o Minor bugfixes (directory authorities):
23907 - Directory authorities now use less space when formatting identical
23908 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
23911 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
23912 - Avoid leaking memory if we fail to compute a consensus signature
23913 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
23914 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
23916 - Fix a memory leak during safe-cookie controller authentication.
23917 Bugfix on 0.2.3.13-alpha.
23918 - Avoid memory leak of IPv6 policy content if we fail to format it into
23919 a router descriptor. Bugfix on 0.2.4.7-alpha.
23921 o Minor bugfixes (other code correctness issues):
23922 - Avoid a crash if we fail to generate an extrainfo descriptor.
23923 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
23924 this is CID 718634.
23925 - When detecting the largest possible file descriptor (in order to
23926 close all file descriptors when launching a new program), actually
23927 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
23928 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
23930 - Fix a copy-and-paste error when adding a missing A1 to a routerset
23931 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
23932 Bugfix on 0.2.4.10-alpha.
23933 - Fix an impossible-to-trigger integer overflow when estimating how
23934 long our onionskin queue would take. (This overflow would require us
23935 to accept 4 million onionskins before processing 100 of them.) Fixes
23936 bug 8210; bugfix on 0.2.4.10-alpha.
23938 o Code simplification and refactoring:
23939 - Add a wrapper function for the common "log a message with a
23943 Changes in version 0.2.4.10-alpha - 2013-02-04
23944 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
23945 certain attacks that flood the network with relays; changes the queue
23946 for circuit create requests from a sized-based limit to a time-based
23947 limit; resumes building with MSVC on Windows; and fixes a wide variety
23950 o Major bugfixes (directory authority):
23951 - When computing directory thresholds, ignore any rejected-as-sybil
23952 nodes during the computation so that they can't influence Fast,
23953 Guard, etc. (We should have done this for proposal 109.) Fixes
23955 - When marking a node as a likely sybil, reset its uptime metrics
23956 to zero, so that it cannot time towards getting marked as Guard,
23957 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
23961 - When a TLS write is partially successful but incomplete, remember
23962 that the flushed part has been flushed, and notice that bytes were
23963 actually written. Reported and fixed pseudonymously. Fixes bug
23964 7708; bugfix on Tor 0.1.0.5-rc.
23965 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
23966 ID: these could be used to create unexpected streams and circuits
23967 which would count as "present" to some parts of Tor but "absent"
23968 to others, leading to zombie circuits and streams or to a bandwidth
23969 denial-of-service. Fixes bug 7889; bugfix on every released version
23970 of Tor. Reported by "oftc_must_be_destroyed".
23971 - Rename all macros in our local copy of queue.h to begin with "TOR_".
23972 This change seems the only good way to permanently prevent conflicts
23973 with queue.h on various operating systems. Fixes bug 8107; bugfix
23976 o Major features (relay):
23977 - Instead of limiting the number of queued onionskins (aka circuit
23978 create requests) to a fixed, hard-to-configure number, we limit
23979 the size of the queue based on how many we expect to be able to
23980 process in a given amount of time. We estimate the time it will
23981 take to process an onionskin based on average processing time
23982 of previous onionskins. Closes ticket 7291. You'll never have to
23983 configure MaxOnionsPending again.
23985 o Major features (portability):
23986 - Resume building correctly with MSVC and Makefile.nmake. This patch
23987 resolves numerous bugs and fixes reported by ultramage, including
23988 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
23989 - Make the ntor and curve25519 code build correctly with MSVC.
23990 Fix on 0.2.4.8-alpha.
23993 - When directory authorities are computing thresholds for flags,
23994 never let the threshold for the Fast flag fall below 4096
23995 bytes. Also, do not consider nodes with extremely low bandwidths
23996 when deciding thresholds for various directory flags. This change
23997 should raise our threshold for Fast relays, possibly in turn
23998 improving overall network performance; see ticket 1854. Resolves
24000 - The Tor client now ignores sub-domain components of a .onion
24001 address. This change makes HTTP "virtual" hosting
24002 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
24003 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
24004 hosted on the same hidden service. Implements proposal 204.
24005 - We compute the overhead from passing onionskins back and forth to
24006 cpuworkers, and report it when dumping statistics in response to
24007 SIGUSR1. Supports ticket 7291.
24009 o Minor features (path selection):
24010 - When deciding whether we have enough descriptors to build circuits,
24011 instead of looking at raw relay counts, look at which fraction
24012 of (bandwidth-weighted) paths we're able to build. This approach
24013 keeps clients from building circuits if their paths are likely to
24014 stand out statistically. The default fraction of paths needed is
24015 taken from the consensus directory; you can override it with the
24016 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
24017 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
24018 and we have GeoIP information, also exclude all nodes with unknown
24019 countries "??" and "A1". This behavior is controlled by the
24020 new GeoIPExcludeUnknown option: you can make such nodes always
24021 excluded with "GeoIPExcludeUnknown 1", and disable the feature
24022 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
24023 gets you the default behavior. Implements feature 7706.
24024 - Path Use Bias: Perform separate accounting for successful circuit
24025 use. Keep separate statistics on stream attempt rates versus stream
24026 success rates for each guard. Provide configurable thresholds to
24027 determine when to emit log messages or disable use of guards that
24028 fail too many stream attempts. Resolves ticket 7802.
24030 o Minor features (log messages):
24031 - When learning a fingerprint for a bridge, log its corresponding
24032 transport type. Implements ticket 7896.
24033 - Improve the log message when "Bug/attack: unexpected sendme cell
24034 from client" occurs, to help us track bug 8093.
24037 - Remove a couple of extraneous semicolons that were upsetting the
24038 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
24039 bugfix on 0.2.2.1-alpha.
24040 - Remove a source of rounding error during path bias count scaling;
24041 don't count cannibalized circuits as used for path bias until we
24042 actually try to use them; and fix a circuit_package_relay_cell()
24043 warning message about n_chan==NULL. Fixes bug 7802.
24044 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
24045 actually link against nacl when we're configured to use it. Fixes
24046 bug 7972; bugfix on 0.2.4.8-alpha.
24047 - Compile correctly with the --disable-curve25519 option. Fixes
24048 bug 8153; bugfix on 0.2.4.8-alpha.
24050 o Build improvements:
24051 - Do not report status verbosely from autogen.sh unless the -v flag
24052 is specified. Fixes issue 4664. Patch from Onizuka.
24053 - Replace all calls to snprintf() outside of src/ext with
24054 tor_snprintf(). Also remove the #define to replace snprintf with
24055 _snprintf on Windows; they have different semantics, and all of
24056 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
24057 - Try to detect if we are ever building on a platform where
24058 memset(...,0,...) does not set the value of a double to 0.0. Such
24059 platforms are permitted by the C standard, though in practice
24060 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
24061 currently support them, but it's better to detect them and fail
24062 than to perform erroneously.
24064 o Removed features:
24065 - Stop exporting estimates of v2 and v3 directory traffic shares
24066 in extrainfo documents. They were unneeded and sometimes inaccurate.
24067 Also stop exporting any v2 directory request statistics. Resolves
24069 - Drop support for detecting and warning about versions of Libevent
24070 before 1.3e. Nothing reasonable ships with them any longer;
24071 warning the user about them shouldn't be needed. Resolves ticket
24074 o Code simplifications and refactoring:
24075 - Rename "isin" functions to "contains", for grammar. Resolves
24077 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
24078 with the natural logarithm function from the system libm. Resolves
24082 Changes in version 0.2.4.9-alpha - 2013-01-15
24083 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
24084 work more robustly.
24087 - Fix backward compatibility logic when receiving an embedded ntor
24088 handshake tunneled in a CREATE cell. This clears up the "Bug:
24089 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
24093 Changes in version 0.2.4.8-alpha - 2013-01-14
24094 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
24095 risks, adds a new stronger and faster circuit handshake, and offers
24096 stronger and faster link encryption when both sides support it.
24099 - Preliminary support for directory guards (proposal 207): when
24100 possible, clients now use their entry guards for non-anonymous
24101 directory requests. This can help prevent client enumeration. Note
24102 that this behavior only works when we have a usable consensus
24103 directory, and when options about what to download are more or less
24104 standard. In the future we should re-bootstrap from our guards,
24105 rather than re-bootstrapping from the preconfigured list of
24106 directory sources that ships with Tor. Resolves ticket 6526.
24107 - Tor relays and clients now support a better CREATE/EXTEND cell
24108 format, allowing the sender to specify multiple address, identity,
24109 and handshake types. Implements Robert Ransom's proposal 200;
24110 closes ticket 7199.
24112 o Major features (new circuit handshake):
24113 - Tor now supports a new circuit extension handshake designed by Ian
24114 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
24115 circuit extension handshake, later called "TAP", was a bit slow
24116 (especially on the relay side), had a fragile security proof, and
24117 used weaker keys than we'd now prefer. The new circuit handshake
24118 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
24119 function, making it significantly more secure than the older
24120 handshake, and significantly faster. Tor can use one of two built-in
24121 pure-C curve25519-donna implementations by Adam Langley, or it
24122 can link against the "nacl" library for a tuned version if present.
24124 The built-in version is very fast for 64-bit systems when building
24125 with GCC. The built-in 32-bit version is still faster than the
24126 old TAP protocol, but using libnacl is better on most such hosts.
24128 Clients don't currently use this protocol by default, since
24129 comparatively few clients support it so far. To try it, set
24130 UseNTorHandshake to 1.
24132 Implements proposal 216; closes ticket 7202.
24134 o Major features (better link encryption):
24135 - Relays can now enable the ECDHE TLS ciphersuites when available
24136 and appropriate. These ciphersuites let us negotiate forward-secure
24137 TLS secret keys more safely and more efficiently than with our
24138 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
24139 public relays prefer the (faster) P224 group, and bridges prefer
24140 the (more common) P256 group; you can override this with the
24143 Enabling these ciphers was a little tricky, since for a long time,
24144 clients had been claiming to support them without actually doing
24145 so, in order to foil fingerprinting. But with the client-side
24146 implementation of proposal 198 in 0.2.3.17-beta, clients can now
24147 match the ciphers from recent Firefox versions *and* list the
24148 ciphers they actually mean, so relays can believe such clients
24149 when they advertise ECDHE support in their TLS ClientHello messages.
24151 This feature requires clients running 0.2.3.17-beta or later,
24152 and requires both sides to be running OpenSSL 1.0.0 or later
24153 with ECC support. OpenSSL 1.0.1, with the compile-time option
24154 "enable-ec_nistp_64_gcc_128", is highly recommended.
24156 Implements the relay side of proposal 198; closes ticket 7200.
24159 - Avoid crashing when, as a relay without IPv6-exit support, a
24160 client insists on getting an IPv6 address or nothing. Fixes bug
24161 7814; bugfix on 0.2.4.7-alpha.
24164 - Improve circuit build timeout handling for hidden services.
24165 In particular: adjust build timeouts more accurately depending
24166 upon the number of hop-RTTs that a particular circuit type
24167 undergoes. Additionally, launch intro circuits in parallel
24168 if they timeout, and take the first one to reply as valid.
24169 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
24170 separate error codes; or at least, don't break for that reason.
24171 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
24172 - Update to the January 2 2013 Maxmind GeoLite Country database.
24174 o Minor features (testing):
24175 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
24176 (P-256) Diffie-Hellman handshakes to src/or/bench.
24177 - Add benchmark functions to test onion handshake performance.
24179 o Minor features (path bias detection):
24180 - Alter the Path Bias log messages to be more descriptive in terms
24181 of reporting timeouts and other statistics.
24182 - Create three levels of Path Bias log messages, as opposed to just
24183 two. These are configurable via consensus as well as via the torrc
24184 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
24185 The default values are 0.70, 0.50, and 0.30 respectively.
24186 - Separate the log message levels from the decision to drop guards,
24187 which also is available via torrc option PathBiasDropGuards.
24188 PathBiasDropGuards still defaults to 0 (off).
24189 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
24190 in combination with PathBiasExtremeRate.
24191 - Increase the default values for PathBiasScaleThreshold and
24192 PathBiasCircThreshold from (200, 20) to (300, 150).
24193 - Add in circuit usage accounting to path bias. If we try to use a
24194 built circuit but fail for any reason, it counts as path bias.
24195 Certain classes of circuits where the adversary gets to pick your
24196 destination node are exempt from this accounting. Usage accounting
24197 can be specifically disabled via consensus parameter or torrc.
24198 - Convert all internal path bias state to double-precision floating
24199 point, to avoid roundoff error and other issues.
24200 - Only record path bias information for circuits that have completed
24201 *two* hops. Assuming end-to-end tagging is the attack vector, this
24202 makes us more resilient to ambient circuit failure without any
24203 detection capability loss.
24205 o Minor bugfixes (log messages):
24206 - Rate-limit the "No circuits are opened. Relaxed timeout for a
24207 circuit with channel state open..." message to once per hour to
24208 keep it from filling the notice logs. Mitigates bug 7799 but does
24209 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
24210 - Avoid spurious warnings when configuring multiple client ports of
24211 which only some are nonlocal. Previously, we had claimed that some
24212 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
24215 o Code simplifications and refactoring:
24216 - Get rid of a couple of harmless clang warnings, where we compared
24217 enums to ints. These warnings are newly introduced in clang 3.2.
24218 - Split the onion.c file into separate modules for the onion queue
24219 and the different handshakes it supports.
24220 - Remove the marshalling/unmarshalling code for sending requests to
24221 cpuworkers over a socket, and instead just send structs. The
24222 recipient will always be the same Tor binary as the sender, so
24223 any encoding is overkill.
24226 Changes in version 0.2.4.7-alpha - 2012-12-24
24227 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
24228 directory mirrors for more robust bootstrapping; fixes more issues where
24229 clients with changing network conditions refuse to make any circuits;
24230 adds initial support for exiting to IPv6 addresses; resumes being able
24231 to update our GeoIP database, and includes the geoip6 file this time;
24232 turns off the client-side DNS cache by default due to privacy risks;
24233 and fixes a variety of other issues.
24235 o Major features (client resilience):
24236 - Add a new "FallbackDir" torrc option to use when we can't use
24237 a directory mirror from the consensus (either because we lack a
24238 consensus, or because they're all down). Currently, all authorities
24239 are fallbacks by default, and there are no other default fallbacks,
24240 but that will change. This option will allow us to give clients a
24241 longer list of servers to try to get a consensus from when first
24242 connecting to the Tor network, and thereby reduce load on the
24243 directory authorities. Implements proposal 206, "Preconfigured
24244 directory sources for bootstrapping". We also removed the old
24245 "FallbackNetworkstatus" option, since we never got it working well
24246 enough to use it. Closes bug 572.
24247 - If we have no circuits open, use a relaxed timeout (the
24248 95-percentile cutoff) until a circuit succeeds. This heuristic
24249 should allow Tor to succeed at building circuits even when the
24250 network connection drastically changes. Should help with bug 3443.
24252 o Major features (IPv6):
24253 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
24254 connectivity, then set the IPv6Exit flag to 1. Also make sure your
24255 exit policy reads as you would like: the address * applies to all
24256 address families, whereas *4 is IPv4 address only, and *6 is IPv6
24257 addresses only. On the client side, you'll need to wait until the
24258 authorities have upgraded, wait for enough exits to support IPv6,
24259 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
24260 ticket 5547, implements proposal 117 as revised in proposal 208.
24262 We DO NOT recommend that clients with actual anonymity needs start
24263 using IPv6 over Tor yet, since not enough exits support it yet.
24265 o Major features (geoip database):
24266 - Maxmind began labelling Tor relays as being in country "A1",
24267 which breaks by-country node selection inside Tor. Now we use a
24268 script to replace "A1" ("Anonymous Proxy") entries in our geoip
24269 file with real country codes. This script fixes about 90% of "A1"
24270 entries automatically and uses manual country code assignments to
24271 fix the remaining 10%. See src/config/README.geoip for details.
24272 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
24273 Country database, as modified above.
24275 o Major bugfixes (client-side DNS):
24276 - Turn off the client-side DNS cache by default. Updating and using
24277 the DNS cache is now configurable on a per-client-port
24278 level. SOCKSPort, DNSPort, etc lines may now contain
24279 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
24280 cache these types of DNS answers when we receive them from an
24281 exit node in response to an application request on this port, and
24282 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
24283 cached DNS answers of these types, we shouldn't use them. It's
24284 potentially risky to use cached DNS answers at the client, since
24285 doing so can indicate to one exit what answers we've gotten
24286 for DNS lookups in the past. With IPv6, this becomes especially
24287 problematic. Using cached DNS answers for requests on the same
24288 circuit would present less linkability risk, since all traffic
24289 on a circuit is already linkable, but it would also provide
24290 little performance benefit: the exit node caches DNS replies
24291 too. Implements a simplified version of Proposal 205. Implements
24294 o Major bugfixes (other):
24295 - Alter circuit build timeout measurement to start at the point
24296 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
24297 initialization). This should make our timeout measurements more
24298 uniform. Previously, we were sometimes including ORconn setup time
24299 in our circuit build time measurements. Should resolve bug 3443.
24300 - Fix an assertion that could trigger in hibernate_go_dormant() when
24301 closing an or_connection_t: call channel_mark_for_close() rather
24302 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
24304 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
24305 7655; bugfix on 0.2.4.6-alpha.
24308 - Add a new torrc option "ServerTransportListenAddr" to let bridge
24309 operators select the address where their pluggable transports will
24310 listen for connections. Resolves ticket 7013.
24311 - Allow an optional $ before the node identity digest in the
24312 controller command GETINFO ns/id/<identity>, for consistency with
24313 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
24314 - Log packaged cell fullness as part of the heartbeat message.
24315 Diagnosis to try to determine the extent of bug 7743.
24317 o Minor features (IPv6):
24318 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
24319 prefer to hand out virtual IPv6 addresses, since there are more of
24320 them and we can't run out. To override this behavior and make IPv4
24321 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
24322 or DNSPort you're using for resolving. Implements ticket 7571.
24323 - AutomapHostsOnResolve responses are now randomized, to avoid
24324 annoying situations where Tor is restarted and applications
24325 connect to the wrong addresses.
24326 - Never try more than 1000 times to pick a new virtual address when
24327 AutomapHostsOnResolve is set. That's good enough so long as we
24328 aren't close to handing out our entire virtual address space;
24329 if you're getting there, it's best to switch to IPv6 virtual
24333 - The ADDRMAP command can no longer generate an ill-formed error
24334 code on a failed MAPADDRESS. It now says "internal" rather than
24335 an English sentence fragment with spaces in the middle. Bugfix on
24336 Tor 0.2.0.19-alpha.
24337 - Fix log messages and comments to avoid saying "GMT" when we mean
24338 "UTC". Fixes bug 6113.
24339 - Compile on win64 using mingw64. Fixes bug 7260; patches from
24341 - Fix a crash when debugging unit tests on Windows: deallocate a
24342 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
24343 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
24346 - The DirServer option is now DirAuthority, for consistency with
24347 current naming patterns. You can still use the old DirServer form.
24349 o Code simplification and refactoring:
24350 - Move the client-side address-map/virtual-address/DNS-cache code
24351 out of connection_edge.c into a new addressmap.c module.
24352 - Remove unused code for parsing v1 directories and "running routers"
24353 documents. Fixes bug 6887.
24356 Changes in version 0.2.3.25 - 2012-11-19
24357 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
24358 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
24359 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
24360 programmer, and friend. Unstinting in his dedication to the cause of
24361 freedom, he inspired and helped many of us as we began our work on
24362 anonymity, and inspires us still. Please honor his memory by writing
24363 software to protect people's freedoms, and by helping others to do so.
24365 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
24366 significantly reduced directory overhead (via microdescriptors),
24367 enormous crypto performance improvements for fast relays on new
24368 enough hardware, a new v3 TLS handshake protocol that can better
24369 resist fingerprinting, support for protocol obfuscation plugins (aka
24370 pluggable transports), better scalability for hidden services, IPv6
24371 support for bridges, performance improvements like allowing clients
24372 to skip the first round-trip on the circuit ("optimistic data") and
24373 refilling token buckets more often, a new "stream isolation" design
24374 to isolate different applications on different circuits, and many
24375 stability, security, and privacy fixes.
24378 - Tor tries to wipe potentially sensitive data after using it, so
24379 that if some subsequent security failure exposes Tor's memory,
24380 the damage will be limited. But we had a bug where the compiler
24381 was eliminating these wipe operations when it decided that the
24382 memory was no longer visible to a (correctly running) program,
24383 hence defeating our attempt at defense in depth. We fix that
24384 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24385 is unlikely to optimize away. Future versions of Tor may use
24386 a less ridiculously heavy approach for this. Fixes bug 7352.
24387 Reported in an article by Andrey Karpov.
24390 - Fix a harmless bug when opting against publishing a relay descriptor
24391 because DisableNetwork is set. Fixes bug 7464; bugfix on
24395 Changes in version 0.2.4.6-alpha - 2012-11-13
24396 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
24397 makes our defense-in-depth memory wiping more reliable, and begins to
24398 count IPv6 addresses in bridge statistics,
24401 - Fix an assertion failure that could occur when closing a connection
24402 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
24404 - Tor tries to wipe potentially sensitive data after using it, so
24405 that if some subsequent security failure exposes Tor's memory,
24406 the damage will be limited. But we had a bug where the compiler
24407 was eliminating these wipe operations when it decided that the
24408 memory was no longer visible to a (correctly running) program,
24409 hence defeating our attempt at defense in depth. We fix that
24410 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
24411 is unlikely to optimize away. Future versions of Tor may use
24412 a less ridiculously heavy approach for this. Fixes bug 7352.
24413 Reported in an article by Andrey Karpov.
24416 - Add GeoIP database for IPv6 addresses. The new config option
24418 - Bridge statistics now count bridge clients connecting over IPv6:
24419 bridge statistics files now list "bridge-ip-versions" and
24420 extra-info documents list "geoip6-db-digest". The control protocol
24421 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
24422 implementation by "shkoo", addressing ticket 5055.
24425 - Warn when we are binding low ports when hibernation is enabled;
24426 previously we had warned when we were _advertising_ low ports with
24427 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
24428 - Fix a harmless bug when opting against publishing a relay descriptor
24429 because DisableNetwork is set. Fixes bug 7464; bugfix on
24431 - Add warning message when a managed proxy dies during configuration.
24432 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
24433 - Fix a linking error when building tor-fw-helper without miniupnp.
24434 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
24435 - Check for closing an or_connection_t without going through correct
24436 channel functions; emit a warning and then call
24437 connection_or_close_for_error() so we don't assert as in bugs 7212
24439 - Compile correctly on compilers without C99 designated initializer
24440 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
24441 - Avoid a possible assert that can occur when channel_send_destroy() is
24442 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
24443 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
24444 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
24445 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
24446 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
24448 o Code simplification and refactoring:
24449 - Start using OpenBSD's implementation of queue.h, so that we don't
24450 need to hand-roll our own pointer and list structures whenever we
24451 need them. (We can't rely on a sys/queue.h, since some operating
24452 systems don't have them, and the ones that do have them don't all
24453 present the same extensions.)
24456 Changes in version 0.2.4.5-alpha - 2012-10-25
24457 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
24458 two important security vulnerabilities that could lead to remotely
24459 triggerable relay crashes, fix a major bug that was preventing clients
24460 from choosing suitable exit nodes, and refactor some of our code.
24462 o Major bugfixes (security, also in 0.2.3.24-rc):
24463 - Fix a group of remotely triggerable assertion failures related to
24464 incorrect link protocol negotiation. Found, diagnosed, and fixed
24465 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24467 - Fix a denial of service attack by which any directory authority
24468 could crash all the others, or by which a single v2 directory
24469 authority could crash everybody downloading v2 directory
24470 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24472 o Major bugfixes (also in 0.2.3.24-rc):
24473 - When parsing exit policy summaries from microdescriptors, we had
24474 previously been ignoring the last character in each one, so that
24475 "accept 80,443,8080" would be treated by clients as indicating
24476 a node that allows access to ports 80, 443, and 808. That would
24477 lead to clients attempting connections that could never work,
24478 and ignoring exit nodes that would support their connections. Now
24479 clients parse these exit policy summaries correctly. Fixes bug 7192;
24480 bugfix on 0.2.3.1-alpha.
24482 o Minor bugfixes (also in 0.2.3.24-rc):
24483 - Clients now consider the ClientRejectInternalAddresses config option
24484 when using a microdescriptor consensus stanza to decide whether
24485 an exit relay would allow exiting to an internal address. Fixes
24486 bug 7190; bugfix on 0.2.3.1-alpha.
24489 - Only disable TLS session ticket support when running as a TLS
24490 server. Now clients will blend better with regular Firefox
24491 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
24493 o Code simplification and refactoring:
24494 - Start using OpenBSD's implementation of queue.h (originally by
24496 - Move the entry node code from circuitbuild.c to its own file.
24497 - Move the circuit build timeout tracking code from circuitbuild.c
24501 Changes in version 0.2.3.24-rc - 2012-10-25
24502 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
24503 could lead to remotely triggerable relay crashes, and fixes
24504 a major bug that was preventing clients from choosing suitable exit
24507 o Major bugfixes (security):
24508 - Fix a group of remotely triggerable assertion failures related to
24509 incorrect link protocol negotiation. Found, diagnosed, and fixed
24510 by "some guy from France". Fix for CVE-2012-2250; bugfix on
24512 - Fix a denial of service attack by which any directory authority
24513 could crash all the others, or by which a single v2 directory
24514 authority could crash everybody downloading v2 directory
24515 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
24518 - When parsing exit policy summaries from microdescriptors, we had
24519 previously been ignoring the last character in each one, so that
24520 "accept 80,443,8080" would be treated by clients as indicating
24521 a node that allows access to ports 80, 443, and 808. That would
24522 lead to clients attempting connections that could never work,
24523 and ignoring exit nodes that would support their connections. Now
24524 clients parse these exit policy summaries correctly. Fixes bug 7192;
24525 bugfix on 0.2.3.1-alpha.
24528 - Clients now consider the ClientRejectInternalAddresses config option
24529 when using a microdescriptor consensus stanza to decide whether
24530 an exit relay would allow exiting to an internal address. Fixes
24531 bug 7190; bugfix on 0.2.3.1-alpha.
24534 Changes in version 0.2.4.4-alpha - 2012-10-20
24535 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
24536 vulnerability introduced by a change in OpenSSL, fixes a remotely
24537 triggerable assert, and adds new channel_t and circuitmux_t abstractions
24538 that will make it easier to test new connection transport and cell
24539 scheduling algorithms.
24541 o New directory authorities (also in 0.2.3.23-rc):
24542 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24543 authority. Closes ticket 5749.
24545 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
24546 - Disable TLS session tickets. OpenSSL's implementation was giving
24547 our TLS session keys the lifetime of our TLS context objects, when
24548 perfect forward secrecy would want us to discard anything that
24549 could decrypt a link connection as soon as the link connection
24550 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24551 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24552 - Discard extraneous renegotiation attempts once the V3 link
24553 protocol has been initiated. Failure to do so left us open to
24554 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24555 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24557 o Internal abstraction features:
24558 - Introduce new channel_t abstraction between circuits and
24559 or_connection_t to allow for implementing alternate OR-to-OR
24560 transports. A channel_t is an abstract object which can either be a
24561 cell-bearing channel, which is responsible for authenticating and
24562 handshaking with the remote OR and transmitting cells to and from
24563 it, or a listening channel, which spawns new cell-bearing channels
24564 at the request of remote ORs. Implements part of ticket 6465.
24565 - Also new is the channel_tls_t subclass of channel_t, adapting it
24566 to the existing or_connection_t code. The V2/V3 protocol handshaking
24567 code which formerly resided in command.c has been moved below the
24568 channel_t abstraction layer and may be found in channeltls.c now.
24569 Implements the rest of ticket 6465.
24570 - Introduce new circuitmux_t storing the queue of circuits for
24571 a channel; this encapsulates and abstracts the queue logic and
24572 circuit selection policy, and allows the latter to be overridden
24573 easily by switching out a policy object. The existing EWMA behavior
24574 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
24576 o Required libraries:
24577 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
24578 strongly recommended.
24581 - Warn users who run hidden services on a Tor client with
24582 UseEntryGuards disabled that their hidden services will be
24583 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
24584 attack which motivated Tor to support entry guards in the first
24585 place). Resolves ticket 6889.
24586 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
24587 dhill. Resolves ticket 6982.
24588 - Option OutboundBindAddress can be specified multiple times and
24589 accepts IPv6 addresses. Resolves ticket 6876.
24591 o Minor bugfixes (also in 0.2.3.23-rc):
24592 - Don't serve or accept v2 hidden service descriptors over a
24593 relay's DirPort. It's never correct to do so, and disabling it
24594 might make it more annoying to exploit any bugs that turn up in the
24595 descriptor-parsing code. Fixes bug 7149.
24596 - Fix two cases in src/or/transports.c where we were calling
24597 fmt_addr() twice in a parameter list. Bug found by David
24598 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
24599 - Fix memory leaks whenever we logged any message about the "path
24600 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
24601 - When relays refuse a "create" cell because their queue of pending
24602 create cells is too big (typically because their cpu can't keep up
24603 with the arrival rate), send back reason "resource limit" rather
24604 than reason "internal", so network measurement scripts can get a
24605 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
24608 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
24609 - Free some more still-in-use memory at exit, to make hunting for
24610 memory leaks easier. Resolves bug 7029.
24611 - When a Tor client gets a "truncated" relay cell, the first byte of
24612 its payload specifies why the circuit was truncated. We were
24613 ignoring this 'reason' byte when tearing down the circuit, resulting
24614 in the controller not being told why the circuit closed. Now we
24615 pass the reason from the truncated cell to the controller. Bugfix
24616 on 0.1.2.3-alpha; fixes bug 7039.
24617 - Downgrade "Failed to hand off onionskin" messages to "debug"
24618 severity, since they're typically redundant with the "Your computer
24619 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
24620 - Make clients running with IPv6 bridges connect over IPv6 again,
24621 even without setting new config options ClientUseIPv6 and
24622 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
24623 - Use square brackets around IPv6 addresses in numerous places
24624 that needed them, including log messages, HTTPS CONNECT proxy
24625 requests, TransportProxy statefile entries, and pluggable transport
24626 extra-info lines. Fixes bug 7011; patch by David Fifield.
24628 o Code refactoring and cleanup:
24629 - Source files taken from other packages now reside in src/ext;
24630 previously they were scattered around the rest of Tor.
24631 - Avoid use of reserved identifiers in our C code. The C standard
24632 doesn't like us declaring anything that starts with an
24633 underscore, so let's knock it off before we get in trouble. Fix
24634 for bug 1031; bugfix on the first Tor commit.
24637 Changes in version 0.2.3.23-rc - 2012-10-20
24638 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
24639 vulnerability introduced by a change in OpenSSL, and fixes a variety
24640 of smaller bugs in preparation for the release.
24642 o New directory authorities:
24643 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
24644 authority. Closes ticket 5749.
24646 o Major bugfixes (security/privacy):
24647 - Disable TLS session tickets. OpenSSL's implementation was giving
24648 our TLS session keys the lifetime of our TLS context objects, when
24649 perfect forward secrecy would want us to discard anything that
24650 could decrypt a link connection as soon as the link connection
24651 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
24652 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
24653 - Discard extraneous renegotiation attempts once the V3 link
24654 protocol has been initiated. Failure to do so left us open to
24655 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
24656 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
24659 - Fix a possible crash bug when checking for deactivated circuits
24660 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
24661 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
24663 o Minor bugfixes (on 0.2.3.x):
24664 - Fix two cases in src/or/transports.c where we were calling
24665 fmt_addr() twice in a parameter list. Bug found by David
24666 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
24667 - Convert an assert in the pathbias code to a log message. The assert
24668 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
24669 bugfix on 0.2.3.17-beta.
24670 - Fix memory leaks whenever we logged any message about the "path
24671 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
24673 o Minor bugfixes (on 0.2.2.x and earlier):
24674 - Don't serve or accept v2 hidden service descriptors over a relay's
24675 DirPort. It's never correct to do so, and disabling it might
24676 make it more annoying to exploit any bugs that turn up in the
24677 descriptor-parsing code. Fixes bug 7149.
24678 - When relays refuse a "create" cell because their queue of pending
24679 create cells is too big (typically because their cpu can't keep up
24680 with the arrival rate), send back reason "resource limit" rather
24681 than reason "internal", so network measurement scripts can get a
24682 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
24683 - Correct file sizes when reading binary files on Cygwin, to avoid
24684 a bug where Tor would fail to read its state file. Fixes bug 6844;
24685 bugfix on 0.1.2.7-alpha.
24686 - Avoid undefined behavior when parsing the list of supported
24687 rendezvous/introduction protocols in a hidden service descriptor.
24688 Previously, Tor would have confused (as-yet-unused) protocol version
24689 numbers greater than 32 with lower ones on many platforms. Fixes
24690 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
24692 o Documentation fixes:
24693 - Clarify that hidden services are TCP only. Fixes bug 6024.
24696 Changes in version 0.2.4.3-alpha - 2012-09-22
24697 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
24698 assertion, resumes letting relays test reachability of their DirPort,
24699 and cleans up a bunch of smaller bugs.
24702 - Fix an assertion failure in tor_timegm() that could be triggered
24703 by a badly formatted directory object. Bug found by fuzzing with
24704 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
24707 - Fix a possible crash bug when checking for deactivated circuits
24708 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
24709 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
24710 - Allow routers to detect that their own DirPorts are running. When
24711 we removed support for versions_supports_begindir, we also
24712 accidentally removed the mechanism we used to self-test our
24713 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
24714 bugfix on 0.2.4.2-alpha.
24716 o Security features:
24717 - Switch to a completely time-invariant approach for picking nodes
24718 weighted by bandwidth. Our old approach would run through the
24719 part of the loop after it had made its choice slightly slower
24720 than it ran through the part of the loop before it had made its
24721 choice. Addresses ticket 6538.
24722 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
24723 by tor2web clients allows hidden services to identify tor2web
24724 clients through their repeated selection of the same rendezvous
24725 and introduction point circuit endpoints (their guards). Resolves
24729 - Enable Tor to read configuration, state, and key information from
24730 a FIFO. Previously Tor would only read from files with a positive
24731 stat.st_size. Code from meejah; fixes bug 6044.
24734 - Correct file sizes when reading binary files on Cygwin, to avoid
24735 a bug where Tor would fail to read its state file. Fixes bug 6844;
24736 bugfix on 0.1.2.7-alpha.
24737 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
24738 bugfix on 0.2.0.3-alpha.
24739 - When complaining about a client port on a public address, log
24740 which address we're complaining about. Fixes bug 4020; bugfix on
24741 0.2.3.3-alpha. Patch by Tom Fitzhenry.
24742 - Convert an assert in the pathbias code to a log message. The assert
24743 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
24744 bugfix on 0.2.3.17-beta.
24745 - Our new buildsystem was overzealous about rebuilding manpages: it
24746 would rebuild them all whenever any one of them changed. Now our
24747 dependency checking should be correct. Fixes bug 6843; bugfix on
24749 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
24750 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
24751 - Correct log printout about which address family is preferred
24752 when connecting to a bridge with both an IPv4 and IPv6 OR port.
24753 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
24755 o Minor bugfixes (code cleanliness):
24756 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
24757 with large values. This situation was untriggered, but nevertheless
24758 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
24759 - Reject consensus votes with more than 64 known-flags. We aren't even
24760 close to that limit yet, and our code doesn't handle it correctly.
24761 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
24762 - Avoid undefined behavior when parsing the list of supported
24763 rendezvous/introduction protocols in a hidden service descriptor.
24764 Previously, Tor would have confused (as-yet-unused) protocol version
24765 numbers greater than 32 with lower ones on many platforms. Fixes
24766 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
24767 - Fix handling of rendezvous client authorization types over 8.
24768 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
24769 - Fix building with older versions of GCC (2.95, for one) that don't
24770 like preprocessor directives inside macro arguments. Found by
24771 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
24772 - Switch weighted node selection rule from using a list of doubles
24773 to using a list of int64_t. This change should make the process
24774 slightly easier to debug and maintain. Needed to finish ticket 6538.
24776 o Code simplification and refactoring:
24777 - Move the generic "config" code into a new file, and have "config.c"
24778 hold only torrc- and state-related code. Resolves ticket 6823.
24779 - Move the core of our "choose a weighted element at random" logic
24780 into its own function, and give it unit tests. Now the logic is
24781 testable, and a little less fragile too.
24782 - Removed the testing_since field of node_t, which hasn't been used
24783 for anything since 0.2.0.9-alpha.
24785 o Documentation fixes:
24786 - Clarify that hidden services are TCP only. Fixes bug 6024.
24787 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
24791 Changes in version 0.2.3.22-rc - 2012-09-11
24792 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
24796 - Fix an assertion failure in tor_timegm() that could be triggered
24797 by a badly formatted directory object. Bug found by fuzzing with
24798 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
24801 - Avoid segfault when starting up having run with an extremely old
24802 version of Tor and parsing its state file. Fixes bug 6801; bugfix
24806 Changes in version 0.2.2.39 - 2012-09-11
24807 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
24811 - Fix an assertion failure in tor_timegm() that could be triggered
24812 by a badly formatted directory object. Bug found by fuzzing with
24813 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
24814 - Do not crash when comparing an address with port value 0 to an
24815 address policy. This bug could have been used to cause a remote
24816 assertion failure by or against directory authorities, or to
24817 allow some applications to crash clients. Fixes bug 6690; bugfix
24821 Changes in version 0.2.4.2-alpha - 2012-09-10
24822 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
24823 raises the default rate limiting even more, and makes the bootstrapping
24824 log messages less noisy.
24827 - Automatically forward the TCP ports of pluggable transport
24828 proxies using tor-fw-helper if PortForwarding is enabled. Implements
24832 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
24833 to 1GB/1GB. The previous defaults were intended to be "basically
24834 infinite", but it turns out they're now limiting our 100mbit+
24835 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
24836 last time we raised it).
24839 - Detect when we're running with a version of OpenSSL other than the
24840 one we compiled with. This has occasionally given people hard-to-
24842 - Log fewer lines at level "notice" about our OpenSSL and Libevent
24843 versions and capabilities when everything is going right. Resolves
24844 part of ticket 6736.
24845 - Directory authorities no long accept descriptors for any version of
24846 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
24847 These versions are insecure, unsupported, or both. Implements
24851 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
24852 to start with a triple-underscore so the controller won't touch it.
24853 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
24854 - Avoid segfault when starting up having run with an extremely old
24855 version of Tor and parsing its state file. Fixes bug 6801; bugfix
24857 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
24858 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
24859 - Don't follow the NULL pointer if microdescriptor generation fails.
24860 (This does not appear to be triggerable, but it's best to be safe.)
24861 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
24862 - Fix mis-declared dependencies on src/common/crypto.c and
24863 src/or/tor_main.c that could break out-of-tree builds under some
24864 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
24865 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
24866 6778; bugfix on 0.2.4.1-alpha.
24867 - Fix a harmless (in this case) build warning for implicitly
24868 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
24870 o Removed features:
24871 - Now that all versions before 0.2.2.x are disallowed, we no longer
24872 need to work around their missing features. Thus we can remove a
24873 bunch of compatibility code.
24875 o Code refactoring:
24876 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
24877 TCP ports to forward. In the past it only accepted two ports:
24878 the ORPort and the DirPort.
24881 Changes in version 0.2.4.1-alpha - 2012-09-05
24882 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
24883 bridgedb; lets relays use IPv6 addresses and directory authorities
24884 advertise them; and switches to a cleaner build interface.
24886 This is the first alpha release in a new series, so expect there to
24887 be bugs. Users who would rather test out a more stable branch should
24888 stay with 0.2.3.x for now.
24890 o Major features (bridges):
24891 - Bridges now report the pluggable transports they support to the
24892 bridge authority, so it can pass the supported transports on to
24893 bridgedb and/or eventually do reachability testing. Implements
24896 o Major features (IPv6):
24897 - Bridge authorities now accept IPv6 bridge addresses and include
24898 them in network status documents. Implements ticket 5534.
24899 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
24900 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
24901 to happen. Implements ticket 5535.
24902 - All kind of relays, not just bridges, can now advertise an IPv6
24903 OR port. Implements ticket 6362.
24904 - Directory authorities vote on IPv6 OR ports using the new consensus
24905 method 14. Implements ticket 6363.
24907 o Major features (build):
24908 - Switch to a nonrecursive Makefile structure. Now instead of each
24909 Makefile.am invoking other Makefile.am's, there is a master
24910 Makefile.am that includes the others. This change makes our build
24911 process slightly more maintainable, and improves parallelism for
24912 building with make -j. Original patch by Stewart Smith; various
24913 fixes by Jim Meyering.
24914 - Where available, we now use automake's "silent" make rules by
24915 default, so that warnings are easier to spot. You can get the old
24916 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
24918 o Minor features (code security and spec conformance):
24919 - Clear keys and key-derived material left on the stack in
24920 rendservice.c and rendclient.c. Check return value of
24921 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
24922 These fixes should make us more forward-secure against cold-boot
24923 attacks and the like. Fixes bug 2385.
24924 - Reject EXTEND cells sent to nonexistent streams. According to the
24925 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
24926 we were only checking for stream IDs that were currently in use.
24927 Found while hunting for more instances of bug 6271. Bugfix on
24928 0.0.2pre8, which introduced incremental circuit construction.
24930 o Minor features (streamlining);
24931 - No longer include the "opt" prefix when generating routerinfos
24932 or v2 directories: it has been needless since Tor 0.1.2. Closes
24934 - Remove some now-needless code that tried to aggressively flush
24935 OR connections as data was added to them. Since 0.2.0.1-alpha, our
24936 cell queue logic has saved us from the failure mode that this code
24937 was supposed to prevent. Removing this code will limit the number
24938 of baroque control flow paths through Tor's network logic. Reported
24939 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
24941 o Minor features (controller):
24942 - Add a "GETINFO signal/names" control port command. Implements
24944 - Provide default values for all options via "GETINFO config/defaults".
24945 Implements ticket 4971.
24947 o Minor features (IPv6):
24948 - New config option "AuthDirHasIPv6Connectivity 1" that directory
24949 authorities should set if they have IPv6 connectivity and want to
24950 do reachability tests for IPv6 relays. Implements feature 5974.
24951 - A relay with an IPv6 OR port now sends that address in NETINFO
24952 cells (in addition to its other address). Implements ticket 6364.
24954 o Minor features (log messages):
24955 - Omit the first heartbeat log message, because it never has anything
24956 useful to say, and it clutters up the bootstrapping messages.
24957 Resolves ticket 6758.
24958 - Don't log about reloading the microdescriptor cache at startup. Our
24959 bootstrap warnings are supposed to tell the user when there's a
24960 problem, and our bootstrap notices say when there isn't. Resolves
24961 ticket 6759; bugfix on 0.2.2.6-alpha.
24962 - Don't log "I learned some more directory information" when we're
24963 reading cached directory information. Reserve it for when new
24964 directory information arrives in response to a fetch. Resolves
24966 - Prevent rounding error in path bias counts when scaling
24967 them down, and use the correct scale factor default. Also demote
24968 some path bias related log messages down a level and make others
24969 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
24970 - We no longer warn so much when generating manpages from their
24973 o Code simplifications and refactoring:
24974 - Enhance our internal sscanf replacement so that we can eliminate
24975 the last remaining uses of the system sscanf. (Though those uses
24976 of sscanf were safe, sscanf itself is generally error prone, so
24977 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
24979 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
24980 - Move last_reachable and testing_since from routerinfo_t to node_t.
24981 Implements ticket 5529.
24982 - Add replaycache_t structure, functions and unit tests, then refactor
24983 rend_service_introduce() to be more clear to read, improve, debug,
24984 and test. Resolves bug 6177.
24985 - Finally remove support for malloc_good_size and malloc_usable_size.
24986 We had hoped that these functions would let us eke a little more
24987 memory out of our malloc implementation. Unfortunately, the only
24988 implementations that provided these functions are also ones that
24989 are already efficient about not overallocation: they never got us
24990 more than 7 or so bytes per allocation. Removing them saves us a
24991 little code complexity and a nontrivial amount of build complexity.
24993 o New requirements:
24994 - Tor maintainers now require Automake version 1.9 or later to build
24995 Tor from the Git repository. (Automake is not required when building
24996 from a source distribution.)
24999 Changes in version 0.2.3.21-rc - 2012-09-05
25000 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
25001 series. It fixes a trio of potential security bugs, fixes a bug where
25002 we were leaving some of the fast relays out of the microdescriptor
25003 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
25004 and cleans up other smaller issues.
25006 o Major bugfixes (security):
25007 - Tear down the circuit if we get an unexpected SENDME cell. Clients
25008 could use this trick to make their circuits receive cells faster
25009 than our flow control would have allowed, or to gum up the network,
25010 or possibly to do targeted memory denial-of-service attacks on
25011 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
25012 from July 2002, before the release of Tor 0.0.0. We had committed
25013 this patch previously, but we had to revert it because of bug 6271.
25014 Now that 6271 is fixed, this patch appears to work.
25015 - Reject any attempt to extend to an internal address. Without
25016 this fix, a router could be used to probe addresses on an internal
25017 network to see whether they were accepting connections. Fixes bug
25018 6710; bugfix on 0.0.8pre1.
25019 - Do not crash when comparing an address with port value 0 to an
25020 address policy. This bug could have been used to cause a remote
25021 assertion failure by or against directory authorities, or to
25022 allow some applications to crash clients. Fixes bug 6690; bugfix
25026 - Remove the upper bound on microdescriptor length. We were hitting
25027 the limit for routers with complex exit policies or family
25028 declarations, causing clients to not use them. Fixes the first
25029 piece of bug 6404; fix on 0.2.2.6-alpha.
25030 - Detect "ORPort 0" as meaning, uniformly, that we're not running
25031 as a relay. Previously, some of our code would treat the presence
25032 of any ORPort line as meaning that we should act like a relay,
25033 even though our new listener code would correctly not open any
25034 ORPorts for ORPort 0. Similar bugs in other Port options are also
25035 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
25038 - Avoid a pair of double-free and use-after-mark bugs that can
25039 occur with certain timings in canceled and re-received DNS
25040 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
25041 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
25042 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
25043 - Allow one-hop directory fetching circuits the full "circuit build
25044 timeout" period, rather than just half of it, before failing them
25045 and marking the relay down. This fix should help reduce cases where
25046 clients declare relays (or worse, bridges) unreachable because
25047 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
25048 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
25050 - Authorities no longer include any router in their microdescriptor
25051 consensuses for which they couldn't generate or agree on a
25052 microdescriptor. Fixes the second piece of bug 6404; fix on
25054 - Detect and reject attempts to specify both "FooPort" and
25055 "FooPort 0" in the same configuration domain. (It's still okay
25056 to have a FooPort in your configuration file, and use "FooPort 0"
25057 on the command line to disable it.) Fixes the second half of bug
25058 6507; bugfix on 0.2.3.3-alpha.
25059 - Make wildcarded addresses (that is, ones beginning with "*.") work
25060 when provided via the controller's MapAddress command. Previously,
25061 they were accepted, but we never actually noticed that they were
25062 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
25063 - Avoid crashing on a malformed state file where EntryGuardPathBias
25064 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
25065 - Add a (probably redundant) memory clear between iterations of
25066 the router status voting loop, to prevent future coding errors
25067 where data might leak between iterations of the loop. Resolves
25070 o Minor bugfixes (log messages):
25071 - Downgrade "set buildtimeout to low value" messages to "info"
25072 severity; they were never an actual problem, there was never
25073 anything reasonable to do about them, and they tended to spam logs
25074 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
25075 - Downgrade path-bias warning messages to "info". We'll try to get
25076 them working better in 0.2.4. Add internal circuit construction
25077 state to protect against the noisy warn message "Unexpectedly high
25078 circuit_successes". Also add some additional rate-limited notice
25079 messages to help determine the root cause of the warn. Fixes bug
25080 6475. Bugfix against 0.2.3.17-beta.
25081 - Move log message when unable to find a microdesc in a routerstatus
25082 entry to parse time. Previously we'd spam this warning every time
25083 we tried to figure out which microdescriptors to download. Fixes
25084 the third piece of bug 6404; fix on 0.2.3.18-rc.
25087 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
25088 change when the authority is deciding whether to accept a newly
25089 uploaded descriptor. Implements ticket 6423.
25090 - Add missing documentation for consensus and microdesc files.
25091 Resolves ticket 6732.
25094 Changes in version 0.2.2.38 - 2012-08-12
25095 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
25096 attack that could in theory leak path information.
25099 - Avoid an uninitialized memory read when reading a vote or consensus
25100 document that has an unrecognized flavor name. This read could
25101 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25102 - Try to leak less information about what relays a client is
25103 choosing to a side-channel attacker. Previously, a Tor client would
25104 stop iterating through the list of available relays as soon as it
25105 had chosen one, thus finishing a little earlier when it picked
25106 a router earlier in the list. If an attacker can recover this
25107 timing information (nontrivial but not proven to be impossible),
25108 they could learn some coarse-grained information about which relays
25109 a client was picking (middle nodes in particular are likelier to
25110 be affected than exits). The timing attack might be mitigated by
25111 other factors (see bug 6537 for some discussion), but it's best
25112 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25115 Changes in version 0.2.3.20-rc - 2012-08-05
25116 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
25117 series. It fixes a pair of code security bugs and a potential anonymity
25118 issue, updates our RPM spec files, and cleans up other smaller issues.
25121 - Avoid read-from-freed-memory and double-free bugs that could occur
25122 when a DNS request fails while launching it. Fixes bug 6480;
25123 bugfix on 0.2.0.1-alpha.
25124 - Avoid an uninitialized memory read when reading a vote or consensus
25125 document that has an unrecognized flavor name. This read could
25126 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
25127 - Try to leak less information about what relays a client is
25128 choosing to a side-channel attacker. Previously, a Tor client would
25129 stop iterating through the list of available relays as soon as it
25130 had chosen one, thus finishing a little earlier when it picked
25131 a router earlier in the list. If an attacker can recover this
25132 timing information (nontrivial but not proven to be impossible),
25133 they could learn some coarse-grained information about which relays
25134 a client was picking (middle nodes in particular are likelier to
25135 be affected than exits). The timing attack might be mitigated by
25136 other factors (see bug 6537 for some discussion), but it's best
25137 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
25140 - Try to make the warning when giving an obsolete SOCKSListenAddress
25141 a little more useful.
25142 - Terminate active server managed proxies if Tor stops being a
25143 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
25144 - Provide a better error message about possible OSX Asciidoc failure
25145 reasons. Fixes bug 6436.
25146 - Warn when Tor is configured to use accounting in a way that can
25147 link a hidden service to some other hidden service or public
25148 address. Resolves ticket 6490.
25151 - Check return value of fputs() when writing authority certificate
25152 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
25153 - Ignore ServerTransportPlugin lines when Tor is not configured as
25154 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
25155 - When disabling guards for having too high a proportion of failed
25156 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
25160 - Update our default RPM spec files to work with mock and rpmbuild
25161 on RHEL/Fedora. They have an updated set of dependencies and
25162 conflicts, a fix for an ancient typo when creating the "_tor"
25163 user, and better instructions. Thanks to Ondrej Mikle for the
25164 patch series. Fixes bug 6043.
25167 - Make it possible to set the TestingTorNetwork configuration
25168 option using AlternateDirAuthority and AlternateBridgeAuthority
25169 as an alternative to setting DirServer. Addresses ticket 6377.
25172 - Clarify the documentation for the Alternate*Authority options.
25174 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
25176 o Code simplification and refactoring:
25177 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
25178 10 lines. Also, don't nest them. Doing so in the past has
25179 led to hard-to-debug code. The new style is to use the
25180 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
25183 Changes in version 0.2.3.19-rc - 2012-07-06
25184 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
25185 series. It fixes the compile on Windows, reverts to a GeoIP database
25186 that isn't as broken, and fixes a flow control bug that has been around
25187 since the beginning of Tor.
25190 - Fix a bug handling SENDME cells on nonexistent streams that could
25191 result in bizarre window values. Report and patch contributed
25192 pseudonymously. Fixes part of bug 6271. This bug was introduced
25193 before the first Tor release, in svn commit r152.
25194 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
25195 June 2012 database, Maxmind marked many Tor relays as country "A1",
25196 which will cause risky behavior for clients that set EntryNodes
25197 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
25198 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
25199 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
25202 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
25203 bugfix on 0.2.1.10-alpha.
25206 Changes in version 0.2.3.18-rc - 2012-06-28
25207 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
25208 series. It fixes a few smaller bugs, but generally appears stable.
25209 Please test it and let us know whether it is!
25212 - Allow wildcarded mapaddress targets to be specified on the
25213 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
25214 - Make our linker option detection code more robust against linkers
25215 such as on FreeBSD 8, where a bad combination of options completes
25216 successfully but makes an unrunnable binary. Fixes bug 6173;
25217 bugfix on 0.2.3.17-beta.
25219 o Minor bugfixes (on 0.2.2.x and earlier):
25220 - Avoid a false positive in the util/threads unit test by increasing
25221 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
25222 - Replace "Sending publish request" log messages with "Launching
25223 upload", so that they no longer confusingly imply that we're
25224 sending something to a directory we might not even be connected
25225 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
25226 - Make sure to set *socket_error in all error cases in
25227 connection_connect(), so it can't produce a warning about
25228 errno being zero from errno_to_orconn_end_reason(). Bugfix on
25229 0.2.1.1-alpha; resolves ticket 6028.
25230 - Downgrade "Got a certificate, but we already have it" log messages
25231 from warning to info, except when we're a dirauth. Fixes bug 5238;
25232 bugfix on 0.2.1.7-alpha.
25233 - When checking for requested signatures on the latest consensus
25234 before serving it to a client, make sure to check the right
25235 consensus flavor. Bugfix on 0.2.2.6-alpha.
25236 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
25237 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
25239 o Minor bugfixes (on 0.2.3.x):
25240 - Make format_helper_exit_status() avoid unnecessary space padding
25241 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
25243 - Downgrade a message about cleaning the microdescriptor cache to
25244 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
25245 - Log a BUG message at severity INFO if we have a networkstatus with
25246 a missing entry for some microdescriptor. Continues on a patch
25248 - Improve the log message when a managed proxy fails to launch. Fixes
25249 bug 5099; bugfix on 0.2.3.6-alpha.
25250 - Don't do DNS lookups when parsing corrupted managed proxy protocol
25251 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
25252 - When formatting wildcarded address mappings for the controller,
25253 be sure to include "*." as appropriate. Partially fixes bug 6244;
25254 bugfix on 0.2.3.9-alpha.
25255 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
25256 Bugfix on 0.2.3.13-alpha.
25257 - Stop logging messages about running with circuit timeout learning
25258 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
25259 - Disable a spurious warning about reading on a marked and flushing
25260 connection. We shouldn't be doing that, but apparently we
25261 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
25262 - Fix a bug that stopped AllowDotExit from working on addresses
25263 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
25266 o Code simplification, refactoring, unit tests:
25267 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
25268 Libevent's notion of cached time when possible.
25269 - Remove duplicate code for invoking getrlimit() from control.c.
25270 - Add a unit test for the environment_variable_names_equal function.
25273 - Document the --defaults-torrc option, and the new (in 0.2.3)
25274 semantics for overriding, extending, and clearing lists of
25275 options. Closes bug 4748.
25278 Changes in version 0.2.3.17-beta - 2012-06-15
25279 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
25280 gets our TLS handshake back on track for being able to blend in with
25281 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
25282 with Vidalia, and otherwise continues to get us closer to a release
25286 - Enable gcc and ld hardening by default. Resolves ticket 5210.
25287 - Update TLS cipher list to match Firefox 8 and later. Resolves
25289 - Implement the client side of proposal 198: remove support for
25290 clients falsely claiming to support standard ciphersuites that
25291 they can actually provide. As of modern OpenSSL versions, it's not
25292 necessary to fake any standard ciphersuite, and doing so prevents
25293 us from using better ciphersuites in the future, since servers
25294 can't know whether an advertised ciphersuite is really supported or
25295 not. Some hosts -- notably, ones with very old versions of OpenSSL
25296 or where OpenSSL has been built with ECC disabled -- will stand
25297 out because of this change; TBB users should not be affected.
25300 - Change the default value for DynamicDHGroups (introduced in
25301 0.2.3.9-alpha) to 0. This feature can make Tor relays less
25302 identifiable by their use of the mod_ssl DH group, but at
25303 the cost of some usability (#4721) and bridge tracing (#6087)
25304 regressions. Resolves ticket 5598.
25305 - Send a CRLF at the end of each STATUS_* control protocol event. This
25306 bug tickled a bug in Vidalia which would make it freeze. Fixes
25307 bug 6094; bugfix on 0.2.3.16-alpha.
25310 - Disable writing on marked-for-close connections when they are
25311 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
25312 bug 5263; bugfix on 0.0.2pre13, where we first added a special
25313 case for flushing marked connections.
25314 - Detect SSL handshake even when the initial attempt to write the
25315 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
25316 - Change the AllowDotExit rules so they should actually work.
25317 We now enforce AllowDotExit only immediately after receiving an
25318 address via SOCKS or DNSPort: other sources are free to provide
25319 .exit addresses after the resolution occurs. Fixes bug 3940;
25320 bugfix on 0.2.2.1-alpha.
25321 - Fix a (harmless) integer overflow in cell statistics reported by
25322 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
25323 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
25324 right places and never depends on the consensus parameters or
25325 computes adaptive timeouts when it is disabled. Fixes bug 5049;
25326 bugfix on 0.2.2.14-alpha.
25327 - When building Tor on Windows with -DUNICODE (not default), ensure
25328 that error messages, filenames, and DNS server names are always
25329 NUL-terminated when we convert them to a single-byte encoding.
25330 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
25331 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
25332 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
25333 - Fix an edge case where TestingTorNetwork is set but the authorities
25334 and relays all have an uptime of zero, where the private Tor network
25335 could briefly lack support for hidden services. Fixes bug 3886;
25336 bugfix on 0.2.2.18-alpha.
25337 - Correct the manpage's descriptions for the default values of
25338 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
25340 - Fix the documentation for the --hush and --quiet command line
25341 options, which changed their behavior back in 0.2.3.3-alpha.
25342 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
25346 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
25347 more information to it, so that we can track it down in case it
25348 returns again. Mitigates bug 5235.
25349 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
25350 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
25351 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
25352 - Warn the user when HTTPProxy, but no other proxy type, is
25353 configured. This can cause surprising behavior: it doesn't send
25354 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
25355 directory traffic only. Resolves ticket 4663.
25356 - Issue a notice if a guard completes less than 40% of your circuits.
25357 Threshold is configurable by torrc option PathBiasNoticeRate and
25358 consensus parameter pb_noticepct. There is additional, off-by-
25359 default code to disable guards which fail too many circuits.
25360 Addresses ticket 5458.
25361 - Update to the June 6 2012 Maxmind GeoLite Country database.
25363 o Code simplifications and refactoring:
25364 - Remove validate_pluggable_transports_config(): its warning
25365 message is now handled by connection_or_connect().
25368 Changes in version 0.2.2.37 - 2012-06-06
25369 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
25370 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25374 - Work around a bug in OpenSSL that broke renegotiation with TLS
25375 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25376 the v2 Tor connection protocol when both sides were using OpenSSL
25377 1.0.1 would fail. Resolves ticket 6033.
25378 - When waiting for a client to renegotiate, don't allow it to add
25379 any bytes to the input buffer. This fixes a potential DoS issue.
25380 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25381 - Fix an edge case where if we fetch or publish a hidden service
25382 descriptor, we might build a 4-hop circuit and then use that circuit
25383 for exiting afterwards -- even if the new last hop doesn't obey our
25384 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25387 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25388 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25391 - Tell GCC and Clang to check for any errors in format strings passed
25392 to the tor_v*(print|scan)f functions.
25395 Changes in version 0.2.3.16-alpha - 2012-06-05
25396 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
25397 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
25398 currently). It also fixes a variety of smaller bugs and other cleanups
25399 that get us closer to a release candidate.
25401 o Major bugfixes (general):
25402 - Work around a bug in OpenSSL that broke renegotiation with TLS
25403 1.1 and TLS 1.2. Without this workaround, all attempts to speak
25404 the v2 Tor connection protocol when both sides were using OpenSSL
25405 1.0.1 would fail. Resolves ticket 6033.
25406 - When waiting for a client to renegotiate, don't allow it to add
25407 any bytes to the input buffer. This fixes a potential DoS issue.
25408 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
25409 - Pass correct OR address to managed proxies (like obfsproxy),
25410 even when ORListenAddress is used. Fixes bug 4865; bugfix on
25412 - The advertised platform of a router now includes only its operating
25413 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
25414 service pack level (for Windows) or its CPU architecture (for Unix).
25415 We also no longer include the "git-XYZ" tag in the version. Resolves
25418 o Major bugfixes (clients):
25419 - If we are unable to find any exit that supports our predicted ports,
25420 stop calling them predicted, so that we don't loop and build
25421 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
25422 which introduced predicted ports.
25423 - Fix an edge case where if we fetch or publish a hidden service
25424 descriptor, we might build a 4-hop circuit and then use that circuit
25425 for exiting afterwards -- even if the new last hop doesn't obey our
25426 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
25427 - Check at each new consensus whether our entry guards were picked
25428 long enough ago that we should rotate them. Previously, we only
25429 did this check at startup, which could lead to us holding a guard
25430 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
25431 - When fetching a bridge descriptor from a bridge authority,
25432 always do so anonymously, whether we have been able to open
25433 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
25434 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
25435 but we'll need to wait for bug 6010 before it's actually usable.
25437 o Major bugfixes (directory authorities):
25438 - When computing weight parameters, behave more robustly in the
25439 presence of a bad bwweightscale value. Previously, the authorities
25440 would crash if they agreed on a sufficiently broken weight_scale
25441 value: now, they use a reasonable default and carry on. Partial
25442 fix for 5786; bugfix on 0.2.2.17-alpha.
25443 - Check more thoroughly to prevent a rogue authority from
25444 double-voting on any consensus directory parameter. Previously,
25445 authorities would crash in this case if the total number of
25446 votes for any parameter exceeded the number of active voters,
25447 but would let it pass otherwise. Partial fix for bug 5786; bugfix
25451 - Rate-limit log messages when asked to connect anonymously to
25452 a private address. When these hit, they tended to hit fast and
25453 often. Also, don't bother trying to connect to addresses that we
25454 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
25455 reply makes us think we have been lied to, even when the address the
25456 client tried to connect to was "localhost." Resolves ticket 2822.
25457 - Allow packagers to insert an extra string in server descriptor
25458 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
25459 Resolves the rest of ticket 2988.
25460 - Raise the threshold of server descriptors needed (75%) and exit
25461 server descriptors needed (50%) before we will declare ourselves
25462 bootstrapped. This will make clients start building circuits a
25463 little later, but makes the initially constructed circuits less
25464 skewed and less in conflict with further directory fetches. Fixes
25466 - Close any connection that sends unrecognized junk before the
25467 handshake. Solves an issue noted in bug 4369.
25468 - Improve log messages about managed transports. Resolves ticket 5070.
25469 - Tag a bridge's descriptor as "never to be sent unencrypted".
25470 This shouldn't matter, since bridges don't open non-anonymous
25471 connections to the bridge authority and don't allow unencrypted
25472 directory connections from clients, but we might as well make
25473 sure. Closes bug 5139.
25474 - Expose our view of whether we have gone dormant to the controller,
25475 via a new "GETINFO dormant" value. Torbutton and other controllers
25476 can use this to avoid doing periodic requests through Tor while
25477 it's dormant (bug 4718). Fixes bug 5954.
25478 - Tell GCC and Clang to check for any errors in format strings passed
25479 to the tor_v*(print|scan)f functions.
25480 - Update to the May 1 2012 Maxmind GeoLite Country database.
25482 o Minor bugfixes (already included in 0.2.2.36):
25483 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
25484 Fixes bug 5346; bugfix on 0.0.8pre3.
25485 - Correct parsing of certain date types in parse_http_time().
25486 Without this patch, If-Modified-Since would behave
25487 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
25488 Esteban Manchado Velázques.
25489 - Make our number-parsing functions always treat too-large values
25490 as an error, even when those values exceed the width of the
25491 underlying type. Previously, if the caller provided these
25492 functions with minima or maxima set to the extreme values of the
25493 underlying integer type, these functions would return those
25494 values on overflow rather than treating overflow as an error.
25495 Fixes part of bug 5786; bugfix on 0.0.9.
25496 - If we hit the error case where routerlist_insert() replaces an
25497 existing (old) server descriptor, make sure to remove that
25498 server descriptor from the old_routers list. Fix related to bug
25499 1776. Bugfix on 0.2.2.18-alpha.
25500 - Clarify the behavior of MaxCircuitDirtiness with hidden service
25501 circuits. Fixes issue 5259.
25503 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
25504 - Prevent a null-pointer dereference when receiving a data cell
25505 for a nonexistent stream when the circuit in question has an
25506 empty deliver window. We don't believe this is triggerable,
25507 since we don't currently allow deliver windows to become empty,
25508 but the logic is tricky enough that it's better to make the code
25509 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
25510 - Fix a memory leak when trying to launch a DNS request when the
25511 network is disabled or the nameservers are unconfigurable. Fixes
25512 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
25513 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
25514 - Don't hold a Windows file handle open for every file mapping;
25515 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
25517 - Avoid O(n^2) performance characteristics when parsing a large
25518 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
25519 - Format more doubles with %f, not %lf. Patch from grarpamp to make
25520 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
25522 - Make our replacement implementation of strtok_r() compatible with
25523 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
25524 bugfix on 0.2.2.1-alpha.
25525 - Fix a NULL-pointer dereference on a badly formed
25526 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
25527 bugfix on 0.2.2.9-alpha.
25528 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
25529 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
25530 - Defensively refactor rend_mid_rendezvous() so that protocol
25531 violations and length checks happen in the beginning. Fixes
25533 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
25534 that IPv6 stuff will compile on MSVC, and compilation issues
25535 will be easier to track down. Fixes bug 5861.
25537 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
25538 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
25539 resource exhaustion, so that clients can adjust their load to
25540 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
25541 started using END_STREAM_REASON_RESOURCELIMIT.
25542 - Don't check for whether the address we're using for outbound
25543 connections has changed until after the outbound connection has
25544 completed. On Windows, getsockname() doesn't succeed until the
25545 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
25546 - If the configuration tries to set MyFamily on a bridge, refuse to
25547 do so, and warn about the security implications. Fixes bug 4657;
25548 bugfix on 0.2.0.3-alpha.
25549 - If the client fails to set a reasonable set of ciphersuites
25550 during its v2 handshake renegotiation, allow the renegotiation to
25551 continue nevertheless (i.e. send all the required certificates).
25552 Fixes bug 4591; bugfix on 0.2.0.20-rc.
25553 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
25554 option is set to 0 (which Vidalia version 0.2.16 now does when
25555 a SAVECONF attempt fails), perform other actions that SIGHUP
25556 usually causes (like reopening the logs). Fixes bug 5095; bugfix
25558 - If we fail to write a microdescriptor to the disk cache, do not
25559 continue replacing the old microdescriptor file. Fixes bug 2954;
25560 bugfix on 0.2.2.6-alpha.
25561 - Exit nodes don't need to fetch certificates for authorities that
25562 they don't recognize; only directory authorities, bridges,
25563 and caches need to do that. Fixes part of bug 2297; bugfix on
25565 - Correctly handle checking the permissions on the parent
25566 directory of a control socket in the root directory. Bug found
25567 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
25569 - When told to add a bridge with the same digest as a preexisting
25570 bridge but a different addr:port, change the addr:port as
25571 requested. Previously we would not notice the change. Fixes half
25572 of bug 5603; fix on 0.2.2.26-beta.
25573 - End AUTHCHALLENGE error messages (in the control protocol) with
25574 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
25576 o Minor bugfixes (on 0.2.3.x):
25577 - Turn an assertion (that the number of handshakes received as a
25578 server is not < 1) into a warning. Fixes bug 4873; bugfix on
25580 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
25581 we had reversed them when the answer was cached.) Fixes bug
25582 5723; bugfix on 0.2.3.1-alpha.
25583 - Work correctly on Linux systems with accept4 support advertised in
25584 their headers, but without accept4 support in the kernel. Fix
25585 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
25586 - When told to add a bridge with the same addr:port as a preexisting
25587 bridge but a different transport, change the transport as
25588 requested. Previously we would not notice the change. Fixes half
25589 of bug 5603; fix on 0.2.3.2-alpha.
25590 - Avoid a "double-reply" warning when replying to a SOCKS request
25591 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
25592 bugfix on 0.2.3.4-alpha.
25593 - Fix a bug where a bridge authority crashes if it has seen no
25594 directory requests when it's time to write statistics to disk.
25595 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
25597 - Don't try to open non-control listeners when DisableNetwork is set.
25598 Previously, we'd open all listeners, then immediately close them.
25599 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
25600 - Don't abort the managed proxy protocol if the managed proxy
25601 sends us an unrecognized line; ignore it instead. Fixes bug
25602 5910; bugfix on 0.2.3.9-alpha.
25603 - Fix a compile warning in crypto.c when compiling with clang 3.1.
25604 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
25605 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
25606 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
25607 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
25608 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
25609 - Resolve numerous small warnings and build issues with MSVC. Resolves
25612 o Documentation fixes:
25613 - Improve the manual's documentation for the NT Service command-line
25614 options. Addresses ticket 3964.
25615 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
25616 - Document the changes to the ORPort and DirPort options, and the
25617 fact that {OR/Dir}ListenAddress is now unnecessary (and
25618 therefore deprecated). Resolves ticket 5597.
25621 - Remove the torrc.bridge file: we don't use it for anything, and
25622 it had become badly desynchronized from torrc.sample. Resolves
25626 Changes in version 0.2.2.36 - 2012-05-24
25627 Tor 0.2.2.36 updates the addresses for two of the eight directory
25628 authorities, fixes some potential anonymity and security issues,
25629 and fixes several crash bugs.
25631 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
25632 known flaws, and nobody should be using them. You should upgrade. If
25633 you're using a Linux or BSD and its packages are obsolete, stop using
25634 those packages and upgrade anyway.
25636 o Directory authority changes:
25637 - Change IP address for maatuska (v3 directory authority).
25638 - Change IP address for ides (v3 directory authority), and rename
25642 - When building or running with any version of OpenSSL earlier
25643 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25644 versions have a bug (CVE-2011-4576) in which their block cipher
25645 padding includes uninitialized data, potentially leaking sensitive
25646 information to any peer with whom they make a SSLv3 connection. Tor
25647 does not use SSL v3 by default, but a hostile client or server
25648 could force an SSLv3 connection in order to gain information that
25649 they shouldn't have been able to get. The best solution here is to
25650 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25651 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25652 to make sure that the bug can't happen.
25653 - Never use a bridge or a controller-supplied node as an exit, even
25654 if its exit policy allows it. Found by wanoskarnet. Fixes bug
25655 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
25656 and 0.2.0.3-alpha (for bridge-purpose descriptors).
25657 - Only build circuits if we have a sufficient threshold of the total
25658 descriptors that are marked in the consensus with the "Exit"
25659 flag. This mitigates an attack proposed by wanoskarnet, in which
25660 all of a client's bridges collude to restrict the exit nodes that
25661 the client knows about. Fixes bug 5343.
25662 - Provide controllers with a safer way to implement the cookie
25663 authentication mechanism. With the old method, if another locally
25664 running program could convince a controller that it was the Tor
25665 process, then that program could trick the controller into telling
25666 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
25667 authentication method uses a challenge-response approach to prevent
25668 this attack. Fixes bug 5185; implements proposal 193.
25671 - Avoid logging uninitialized data when unable to decode a hidden
25672 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
25673 - Avoid a client-side assertion failure when receiving an INTRODUCE2
25674 cell on a general purpose circuit. Fixes bug 5644; bugfix on
25676 - Fix builds when the path to sed, openssl, or sha1sum contains
25677 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
25679 - Correct our replacements for the timeradd() and timersub() functions
25680 on platforms that lack them (for example, Windows). The timersub()
25681 function is used when expiring circuits, while timeradd() is
25682 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
25683 bugfix on 0.2.2.24-alpha.
25684 - Fix the SOCKET_OK test that we use to tell when socket
25685 creation fails so that it works on Win64. Fixes part of bug 4533;
25686 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
25689 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
25690 Fixes bug 5346; bugfix on 0.0.8pre3.
25691 - Make our number-parsing functions always treat too-large values
25692 as an error, even when those values exceed the width of the
25693 underlying type. Previously, if the caller provided these
25694 functions with minima or maxima set to the extreme values of the
25695 underlying integer type, these functions would return those
25696 values on overflow rather than treating overflow as an error.
25697 Fixes part of bug 5786; bugfix on 0.0.9.
25698 - Older Linux kernels erroneously respond to strange nmap behavior
25699 by having accept() return successfully with a zero-length
25700 socket. When this happens, just close the connection. Previously,
25701 we would try harder to learn the remote address: but there was
25702 no such remote address to learn, and our method for trying to
25703 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
25704 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
25705 - Correct parsing of certain date types in parse_http_time().
25706 Without this patch, If-Modified-Since would behave
25707 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
25708 Esteban Manchado Velázques.
25709 - Change the BridgePassword feature (part of the "bridge community"
25710 design, which is not yet implemented) to use a time-independent
25711 comparison. The old behavior might have allowed an adversary
25712 to use timing to guess the BridgePassword value. Fixes bug 5543;
25713 bugfix on 0.2.0.14-alpha.
25714 - Detect and reject certain misformed escape sequences in
25715 configuration values. Previously, these values would cause us
25716 to crash if received in a torrc file or over an authenticated
25717 control port. Bug found by Esteban Manchado Velázquez, and
25718 independently by Robert Connolly from Matta Consulting who further
25719 noted that it allows a post-authentication heap overflow. Patch
25720 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
25721 bugfix on 0.2.0.16-alpha.
25722 - Fix a compile warning when using the --enable-openbsd-malloc
25723 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
25724 - During configure, detect when we're building with clang version
25725 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
25726 CFLAGS. clang doesn't support them yet.
25727 - When sending an HTTP/1.1 proxy request, include a Host header.
25728 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
25729 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
25730 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
25731 - If we hit the error case where routerlist_insert() replaces an
25732 existing (old) server descriptor, make sure to remove that
25733 server descriptor from the old_routers list. Fix related to bug
25734 1776. Bugfix on 0.2.2.18-alpha.
25736 o Minor bugfixes (documentation and log messages):
25737 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
25738 Fixes bug 4856; bugfix on Tor 0.0.6.
25739 - Update "ClientOnly" man page entry to explain that there isn't
25740 really any point to messing with it. Resolves ticket 5005.
25741 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
25742 directory authority option (introduced in Tor 0.2.2.34).
25743 - Downgrade the "We're missing a certificate" message from notice
25744 to info: people kept mistaking it for a real problem, whereas it
25745 is seldom the problem even when we are failing to bootstrap. Fixes
25746 bug 5067; bugfix on 0.2.0.10-alpha.
25747 - Correctly spell "connect" in a log message on failure to create a
25748 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
25749 - Clarify the behavior of MaxCircuitDirtiness with hidden service
25750 circuits. Fixes issue 5259.
25753 - Directory authorities now reject versions of Tor older than
25754 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
25755 inclusive. These versions accounted for only a small fraction of
25756 the Tor network, and have numerous known security issues. Resolves
25758 - Update to the May 1 2012 Maxmind GeoLite Country database.
25761 - When sending or relaying a RELAY_EARLY cell, we used to convert
25762 it to a RELAY cell if the connection was using the v1 link
25763 protocol. This was a workaround for older versions of Tor, which
25764 didn't handle RELAY_EARLY cells properly. Now that all supported
25765 versions can handle RELAY_EARLY cells, and now that we're enforcing
25766 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
25767 remove this workaround. Addresses bug 4786.
25770 Changes in version 0.2.3.15-alpha - 2012-04-30
25771 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
25772 the development branch build on Windows again.
25774 o Minor bugfixes (on 0.2.2.x and earlier):
25775 - Make sure that there are no unhandled pending TLS errors before
25776 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
25777 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
25778 Bugfix on 0.1.0.5-rc; fixes bug 4528.
25779 - Fix an assert that directory authorities could trigger on sighup
25780 during some configuration state transitions. We now don't treat
25781 it as a fatal error when the new descriptor we just generated in
25782 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
25783 - After we pick a directory mirror, we would refuse to use it if
25784 it's in our ExcludeExitNodes list, resulting in mysterious failures
25785 to bootstrap for people who just wanted to avoid exiting from
25786 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
25787 - When building with --enable-static-tor on OpenBSD, do not
25788 erroneously attempt to link -lrt. Fixes bug 5103.
25790 o Minor bugfixes (on 0.2.3.x):
25791 - When Tor is built with kernel headers from a recent (last few
25792 years) Linux kernel, do not fail to run on older (pre-2.6.28
25793 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
25794 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
25795 and 0.2.3.12-alpha.
25796 - Fix compilation with miniupnpc version 1.6; patch from
25797 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
25798 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
25799 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
25800 - Fix compilation on platforms without unistd.h, or where environ
25801 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
25804 - Directory authorities are now a little more lenient at accepting
25805 older router descriptors, or newer router descriptors that don't
25806 make big changes. This should help ameliorate past and future
25807 issues where routers think they have uploaded valid descriptors,
25808 but the authorities don't think so. Fix for ticket 2479.
25809 - Make the code that clients use to detect an address change be
25810 IPv6-aware, so that it won't fill clients' logs with error
25811 messages when trying to get the IPv4 address of an IPv6
25812 connection. Implements ticket 5537.
25814 o Removed features:
25815 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
25816 authorities needed to use it for a while to keep the network working
25817 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
25818 that was six months ago. As of now, it should no longer be needed
25822 Changes in version 0.2.3.14-alpha - 2012-04-23
25823 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
25824 candidate. It also dramatically speeds up AES: fast relays should
25825 consider switching to the newer OpenSSL library.
25827 o Directory authority changes:
25828 - Change IP address for ides (v3 directory authority), and rename
25832 - Avoid logging uninitialized data when unable to decode a hidden
25833 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
25834 - Avoid a client-side assertion failure when receiving an INTRODUCE2
25835 cell on a general purpose circuit. Fixes bug 5644; bugfix on
25837 - If authorities are unable to get a v2 consensus document from other
25838 directory authorities, they no longer fall back to fetching
25839 them from regular directory caches. Fixes bug 5635; bugfix on
25840 0.2.2.26-beta, where routers stopped downloading v2 consensus
25841 documents entirely.
25842 - When we start a Tor client with a normal consensus already cached,
25843 be willing to download a microdescriptor consensus. Fixes bug 4011;
25844 fix on 0.2.3.1-alpha.
25846 o Major features (performance):
25847 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
25848 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
25849 vectorized AES implementations as appropriate. These can be much,
25850 much faster than other AES implementations.
25852 o Minor bugfixes (0.2.2.x and earlier):
25853 - Don't launch more than 10 service-side introduction-point circuits
25854 for a hidden service in five minutes. Previously, we would consider
25855 launching more introduction-point circuits if at least one second
25856 had passed without any introduction-point circuits failing. Fixes
25857 bug 4607; bugfix on 0.0.7pre1.
25858 - Change the BridgePassword feature (part of the "bridge community"
25859 design, which is not yet implemented) to use a time-independent
25860 comparison. The old behavior might have allowed an adversary
25861 to use timing to guess the BridgePassword value. Fixes bug 5543;
25862 bugfix on 0.2.0.14-alpha.
25863 - Enforce correct return behavior of tor_vsscanf() when the '%%'
25864 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
25865 - When sending an HTTP/1.1 proxy request, include a Host header.
25866 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
25867 - Don't log that we have "decided to publish new relay descriptor"
25868 unless we are actually publishing a descriptor. Fixes bug 3942;
25869 bugfix on 0.2.2.28-beta.
25871 o Minor bugfixes (0.2.3.x):
25872 - Fix a bug where a bridge authority crashes (on a failed assert)
25873 if it has seen no directory requests when it's time to write
25874 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
25875 - Fix bug stomping on ORPort option NoListen and ignoring option
25876 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
25877 - In the testsuite, provide a large enough buffer in the tor_sscanf
25878 unit test. Otherwise we'd overrun that buffer and crash during
25879 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
25881 - Make sure we create the keys directory if it doesn't exist and we're
25882 about to store the dynamic Diffie-Hellman parameters. Fixes bug
25883 5572; bugfix on 0.2.3.13-alpha.
25884 - Fix a small memory leak when trying to decode incorrect base16
25885 authenticator during SAFECOOKIE authentication. Found by
25886 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
25889 - Add more information to a log statement that might help track down
25890 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
25891 non-IP address" messages (or any Bug messages, for that matter!),
25892 please let us know about it.
25893 - Relays now understand an IPv6 address when they get one from a
25894 directory server. Resolves ticket 4875.
25895 - Resolve IPv6 addresses in bridge and entry statistics to country
25896 code "??" which means we at least count them. Resolves ticket 5053;
25897 improves on 0.2.3.9-alpha.
25898 - Update to the April 3 2012 Maxmind GeoLite Country database.
25899 - Begin a doc/state-contents.txt file to explain the contents of
25900 the Tor state file. Fixes bug 2987.
25902 o Default torrc changes:
25903 - Stop listing "socksport 9050" in torrc.sample. We open a socks
25904 port on 9050 by default anyway, so this should not change anything
25906 - Stop mentioning the deprecated *ListenAddress options in
25907 torrc.sample. Fixes bug 5438.
25908 - Document unit of bandwidth related options in sample torrc.
25911 o Removed features:
25912 - The "torify" script no longer supports the "tsocks" socksifier
25913 tool, since tsocks doesn't support DNS and UDP right for Tor.
25914 Everyone should be using torsocks instead. Fixes bugs 3530 and
25915 5180. Based on a patch by "ugh".
25917 o Code refactoring:
25918 - Change the symmetric cipher interface so that creating and
25919 initializing a stream cipher are no longer separate functions.
25920 - Remove all internal support for unpadded RSA. We never used it, and
25921 it would be a bad idea to start.
25924 Changes in version 0.2.3.13-alpha - 2012-03-26
25925 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
25926 in managed pluggable transports, as well as providing other cleanups
25927 that get us closer to a release candidate.
25929 o Directory authority changes:
25930 - Change IP address for maatuska (v3 directory authority).
25933 - Provide controllers with a safer way to implement the cookie
25934 authentication mechanism. With the old method, if another locally
25935 running program could convince a controller that it was the Tor
25936 process, then that program could trick the controller into telling
25937 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
25938 authentication method uses a challenge-response approach to prevent
25939 this attack. Fixes bug 5185, implements proposal 193.
25940 - Never use a bridge or a controller-supplied node as an exit, even
25941 if its exit policy allows it. Found by wanoskarnet. Fixes bug
25942 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
25943 and 0.2.0.3-alpha (for bridge-purpose descriptors).
25944 - Only build circuits if we have a sufficient threshold of the total
25945 descriptors that are marked in the consensus with the "Exit"
25946 flag. This mitigates an attack proposed by wanoskarnet, in which
25947 all of a client's bridges collude to restrict the exit nodes that
25948 the client knows about. Fixes bug 5343.
25950 o Major bugfixes (on Tor 0.2.3.x):
25951 - Avoid an assert when managed proxies like obfsproxy are configured,
25952 and we receive HUP signals or setconf attempts too rapidly. This
25953 situation happens most commonly when Vidalia tries to attach to
25954 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
25955 bugfix on 0.2.3.6-alpha.
25956 - Fix a relay-side pluggable transports bug where managed proxies were
25957 unreachable from the Internet, because Tor asked them to bind on
25958 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
25959 - Stop discarding command-line arguments when TestingTorNetwork
25960 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
25961 0.2.3.9-alpha, where task 4552 added support for two layers of
25963 - Resume allowing the unit tests to run in gdb. This was accidentally
25964 made impossible when the DisableDebuggerAttachment option was
25965 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
25966 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
25967 0.2.3.11-alpha. Reported by Anthony G. Basile.
25969 o Minor bugfixes (on 0.2.2.x and earlier):
25970 - Ensure we don't cannibalize circuits that are longer than three hops
25971 already, so we don't end up making circuits with 5 or more
25972 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
25973 0.1.0.1-rc which introduced cannibalization.
25974 - Detect and reject certain misformed escape sequences in
25975 configuration values. Previously, these values would cause us
25976 to crash if received in a torrc file or over an authenticated
25977 control port. Bug found by Esteban Manchado Velázquez, and
25978 independently by Robert Connolly from Matta Consulting who further
25979 noted that it allows a post-authentication heap overflow. Patch
25980 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
25981 bugfix on 0.2.0.16-alpha.
25982 - Fix a compile warning when using the --enable-openbsd-malloc
25983 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
25984 - Directory caches no longer refuse to clean out descriptors because
25985 of missing v2 networkstatus documents, unless they're configured
25986 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
25987 0.2.2.26-beta. Patch by Daniel Bryg.
25988 - Update to the latest version of the tinytest unit testing framework.
25989 This includes a couple of bugfixes that can be relevant for
25990 running forked unit tests on Windows, and removes all reserved
25993 o Minor bugfixes (on 0.2.3.x):
25994 - On a failed pipe() call, don't leak file descriptors. Fixes bug
25995 4296; bugfix on 0.2.3.1-alpha.
25996 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
25997 until after we have received a CERTS cell. Fixes bug 4361; bugfix
25998 on 0.2.3.6-alpha. Patch by "frosty".
25999 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
26000 option, so that the IP stack doesn't decide to use it for IPv4
26001 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
26002 - Ensure that variables set in Tor's environment cannot override
26003 environment variables that Tor passes to a managed
26004 pluggable-transport proxy. Previously, Tor would pass every
26005 variable in its environment to managed proxies along with the new
26006 ones, in such a way that on many operating systems, the inherited
26007 environment variables would override those which Tor tried to
26008 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
26009 bugfix on 0.2.3.9-alpha for Windows.
26012 - A wide variety of new unit tests by Esteban Manchado Velázquez.
26013 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
26014 - Update to the March 6 2012 Maxmind GeoLite Country database.
26017 Changes in version 0.2.3.12-alpha - 2012-02-13
26018 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
26019 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
26020 when Tor is configured to use a pluggable transport like obfsproxy.
26023 - Fix builds when the path to sed, openssl, or sha1sum contains
26024 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
26026 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
26027 connections. This change should allow busy exit relays to stop
26028 running out of available sockets as quickly. Fixes bug 4950;
26029 bugfix on 0.2.2.26-beta.
26030 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
26031 would ask the bridge for microdescriptors, which are only supported
26032 in 0.2.3.x, and then fail to bootstrap when it didn't get the
26033 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
26034 - Properly set up obfsproxy's environment when in managed mode. The
26035 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
26036 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
26037 5076 and 5082; bugfix on 0.2.3.6-alpha.
26040 - Use the dead_strip option when building Tor on OS X. This reduces
26041 binary size by almost 19% when linking openssl and libevent
26042 statically, which we do for Tor Browser Bundle.
26043 - Fix broken URLs in the sample torrc file, and tell readers about
26044 the OutboundBindAddress, ExitPolicyRejectPrivate, and
26045 PublishServerDescriptor options. Addresses bug 4652.
26046 - Update to the February 7 2012 Maxmind GeoLite Country database.
26049 - Downgrade the "We're missing a certificate" message from notice
26050 to info: people kept mistaking it for a real problem, whereas it
26051 is seldom the problem even when we are failing to bootstrap. Fixes
26052 bug 5067; bugfix on 0.2.0.10-alpha.
26053 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
26054 managed pluggable transport server proxy's environment.
26055 Previously, we would put it there, even though Tor doesn't
26056 implement an 'extended server port' yet, and even though Tor
26057 almost certainly isn't listening at that address. For now, we set
26058 it to an empty string to avoid crashing older obfsproxies. Bugfix
26060 - Log the heartbeat message every HeartbeatPeriod seconds, not every
26061 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
26062 0.2.3.1-alpha. Bug reported by Scott Bennett.
26063 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
26064 bugfix on 0.2.3.11-alpha.
26065 - Update "ClientOnly" man page entry to explain that there isn't
26066 really any point to messing with it. Resolves ticket 5005.
26067 - Use the correct CVE number for CVE-2011-4576 in our comments and
26068 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
26071 o Code simplifications and refactoring:
26072 - Use the _WIN32 macro throughout our code to detect Windows.
26073 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
26077 Changes in version 0.2.3.11-alpha - 2012-01-22
26078 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
26079 the last step of the plan to limit maximum circuit length, includes
26080 a wide variety of hidden service performance and correctness fixes,
26081 works around an OpenSSL security flaw if your distro is too stubborn
26082 to upgrade, and fixes a bunch of smaller issues.
26085 - Now that Tor 0.2.0.x is completely deprecated, enable the final
26086 part of "Proposal 110: Avoiding infinite length circuits" by
26087 refusing all circuit-extend requests that do not use a relay_early
26088 cell. This change helps Tor resist a class of denial-of-service
26089 attacks by limiting the maximum circuit length.
26090 - Adjust the number of introduction points that a hidden service
26091 will try to maintain based on how long its introduction points
26092 remain in use and how many introductions they handle. Fixes
26094 - Try to use system facilities for enumerating local interface
26095 addresses, before falling back to our old approach (which was
26096 binding a UDP socket, and calling getsockname() on it). That
26097 approach was scaring OS X users whose draconian firewall
26098 software warned about binding to UDP sockets, regardless of
26099 whether packets were sent. Now we try to use getifaddrs(),
26100 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
26101 system supports. Resolves ticket 1827.
26103 o Major security workaround:
26104 - When building or running with any version of OpenSSL earlier
26105 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
26106 versions have a bug (CVE-2011-4576) in which their block cipher
26107 padding includes uninitialized data, potentially leaking sensitive
26108 information to any peer with whom they make a SSLv3 connection. Tor
26109 does not use SSL v3 by default, but a hostile client or server
26110 could force an SSLv3 connection in order to gain information that
26111 they shouldn't have been able to get. The best solution here is to
26112 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
26113 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
26114 to make sure that the bug can't happen.
26117 - Fix the SOCKET_OK test that we use to tell when socket
26118 creation fails so that it works on Win64. Fixes part of bug 4533;
26119 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
26120 - Correct our replacements for the timeradd() and timersub() functions
26121 on platforms that lack them (for example, Windows). The timersub()
26122 function is used when expiring circuits, while timeradd() is
26123 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
26124 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
26125 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
26126 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
26127 bug at runtime, not compile time, because some distributions hack
26128 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
26129 on 0.2.3.9-alpha. Found by Pascal.
26131 o Minor features (controller):
26132 - Use absolute path names when reporting the torrc filename in the
26133 control protocol, so a controller can more easily find the torrc
26134 file. Resolves bug 1101.
26135 - Extend the control protocol to report flags that control a circuit's
26136 path selection in CIRC events and in replies to 'GETINFO
26137 circuit-status'. Implements part of ticket 2411.
26138 - Extend the control protocol to report the hidden service address
26139 and current state of a hidden-service-related circuit in CIRC
26140 events and in replies to 'GETINFO circuit-status'. Implements part
26142 - When reporting the path to the cookie file to the controller,
26143 give an absolute path. Resolves ticket 4881.
26144 - Allow controllers to request an event notification whenever a
26145 circuit is cannibalized or its purpose is changed. Implements
26146 part of ticket 3457.
26147 - Include the creation time of a circuit in CIRC and CIRC2
26148 control-port events and the list produced by the 'GETINFO
26149 circuit-status' control-port command.
26151 o Minor features (directory authorities):
26152 - Directory authorities now reject versions of Tor older than
26153 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
26154 inclusive. These versions accounted for only a small fraction of
26155 the Tor network, and have numerous known security issues. Resolves
26157 - Authority operators can now vote for all relays in a given
26158 set of countries to be BadDir/BadExit/Invalid/Rejected.
26159 - Provide two consensus parameters (FastFlagMinThreshold and
26160 FastFlagMaxThreshold) to control the range of allowable bandwidths
26161 for the Fast directory flag. These allow authorities to run
26162 experiments on appropriate requirements for being a "Fast" node.
26163 The AuthDirFastGuarantee config value still applies. Implements
26165 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
26166 directory authority option (introduced in Tor 0.2.2.34).
26168 o Minor features (other):
26169 - Don't disable the DirPort when we cannot exceed our AccountingMax
26170 limit during this interval because the effective bandwidthrate is
26171 low enough. This is useful in a situation where AccountMax is only
26172 used as an additional safeguard or to provide statistics.
26173 - Prepend an informative header to generated dynamic_dh_params files.
26174 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
26175 EntryNodes will have no effect. Resolves issue 2571.
26176 - Log more useful messages when we fail to disable debugger
26178 - Log which authority we're missing votes from when we go to fetch
26179 them from the other auths.
26180 - Log (at debug level) whenever a circuit's purpose is changed.
26181 - Add missing documentation for the MaxClientCircuitsPending,
26182 UseMicrodescriptors, UserspaceIOCPBuffers, and
26183 _UseFilteringSSLBufferevents options, all introduced during
26184 the 0.2.3.x series.
26185 - Update to the January 3 2012 Maxmind GeoLite Country database.
26187 o Minor bugfixes (hidden services):
26188 - Don't close hidden service client circuits which have almost
26189 finished connecting to their destination when they reach
26190 the normal circuit-build timeout. Previously, we would close
26191 introduction circuits which are waiting for an acknowledgement
26192 from the introduction point, and rendezvous circuits which have
26193 been specified in an INTRODUCE1 cell sent to a hidden service,
26194 after the normal CBT. Now, we mark them as 'timed out', and launch
26195 another rendezvous attempt in parallel. This behavior change can
26196 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
26197 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
26198 - Don't close hidden-service-side rendezvous circuits when they
26199 reach the normal circuit-build timeout. This behavior change can
26200 be disabled using the new
26201 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
26202 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
26203 - Make sure we never mark the wrong rendezvous circuit as having
26204 had its introduction cell acknowledged by the introduction-point
26205 relay. Previously, when we received an INTRODUCE_ACK cell on a
26206 client-side hidden-service introduction circuit, we might have
26207 marked a rendezvous circuit other than the one we specified in
26208 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
26209 a warning message and interfered with the hidden service
26210 connection-establishment process. Fixes bug 4759; bugfix on
26211 0.2.3.3-alpha, when we added the stream-isolation feature which
26212 might cause Tor to open multiple rendezvous circuits for the same
26214 - Don't trigger an assertion failure when we mark a new client-side
26215 hidden-service introduction circuit for close during the process
26216 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
26219 o Minor bugfixes (log messages):
26220 - Correctly spell "connect" in a log message on failure to create a
26221 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
26223 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
26224 Fixes bug 4856; bugfix on Tor 0.0.6.
26225 - Fix the log message describing how we work around discovering
26226 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
26227 4837; bugfix on 0.2.2.9-alpha.
26228 - When logging about a disallowed .exit name, do not also call it
26229 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
26231 o Minor bugfixes (build fixes):
26232 - During configure, detect when we're building with clang version
26233 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
26234 CFLAGS. clang doesn't support them yet.
26235 - During configure, search for library containing cos function as
26236 libm lives in libcore on some platforms (BeOS/Haiku). Linking
26237 against libm was hard-coded before. Fixes the first part of bug
26238 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
26240 - Detect attempts to build Tor on (as yet hypothetical) versions
26241 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
26242 fix for bug 4533. Bugfix on 0.2.2.28-beta.
26243 - Preprocessor directives should not be put inside the arguments
26244 of a macro. This would break compilation with GCC releases prior
26245 to version 3.3. We would never recommend such an old GCC version,
26246 but it is apparently required for binary compatibility on some
26247 platforms (namely, certain builds of Haiku). Fixes the other part
26248 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
26251 o Minor bugfixes (other):
26252 - Older Linux kernels erroneously respond to strange nmap behavior
26253 by having accept() return successfully with a zero-length
26254 socket. When this happens, just close the connection. Previously,
26255 we would try harder to learn the remote address: but there was
26256 no such remote address to learn, and our method for trying to
26257 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
26258 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
26259 - Fix null-pointer access that could occur if TLS allocation failed.
26260 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
26261 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
26262 accidentally been reverted.
26263 - Fix our implementation of crypto_random_hostname() so it can't
26264 overflow on ridiculously large inputs. (No Tor version has ever
26265 provided this kind of bad inputs, but let's be correct in depth.)
26266 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
26267 - Find more places in the code that should have been testing for
26268 invalid sockets using the SOCKET_OK macro. Required for a fix
26269 for bug 4533. Bugfix on 0.2.2.28-beta.
26270 - Fix an assertion failure when, while running with bufferevents, a
26271 connection finishes connecting after it is marked for close, but
26272 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
26273 - test_util_spawn_background_ok() hardcoded the expected value
26274 for ENOENT to 2. This isn't portable as error numbers are
26275 platform specific, and particularly the hurd has ENOENT at
26276 0x40000002. Construct expected string at runtime, using the correct
26277 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
26278 - Reject attempts to disable DisableDebuggerAttachment while Tor is
26279 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
26280 - Use an appropriate-width type for sockets in tor-fw-helper on
26281 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
26284 - When sending or relaying a RELAY_EARLY cell, we used to convert
26285 it to a RELAY cell if the connection was using the v1 link
26286 protocol. This was a workaround for older versions of Tor, which
26287 didn't handle RELAY_EARLY cells properly. Now that all supported
26288 versions can handle RELAY_EARLY cells, and now that we're enforcing
26289 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
26290 remove this workaround. Addresses bug 4786.
26292 o Code simplifications and refactoring:
26293 - Use OpenSSL's built-in SSL_state_string_long() instead of our
26294 own homebrewed ssl_state_to_string() replacement. Patch from
26295 Emile Snyder. Fixes bug 4653.
26296 - Use macros to indicate OpenSSL versions, so we don't need to worry
26297 about accidental hexadecimal bit shifts.
26298 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
26300 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
26301 - Use the smartlist_add_asprintf() alias more consistently.
26302 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
26303 invalid value, rather than just -1.
26304 - Rename a handful of old identifiers, mostly related to crypto
26305 structures and crypto functions. By convention, our "create an
26306 object" functions are called "type_new()", our "free an object"
26307 functions are called "type_free()", and our types indicate that
26308 they are types only with a final "_t". But a handful of older
26309 types and functions broke these rules, with function names like
26310 "type_create" or "subsystem_op_type", or with type names like
26314 Changes in version 0.2.3.10-alpha - 2011-12-16
26315 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
26316 Tor's buffers code. Absolutely everybody should upgrade.
26318 The bug relied on an incorrect calculation when making data continuous
26319 in one of our IO buffers, if the first chunk of the buffer was
26320 misaligned by just the wrong amount. The miscalculation would allow an
26321 attacker to overflow a piece of heap-allocated memory. To mount this
26322 attack, the attacker would need to either open a SOCKS connection to
26323 Tor's SocksPort (usually restricted to localhost), or target a Tor
26324 instance configured to make its connections through a SOCKS proxy
26325 (which Tor does not do by default).
26327 Good security practice requires that all heap-overflow bugs should be
26328 presumed to be exploitable until proven otherwise, so we are treating
26329 this as a potential code execution attack. Please upgrade immediately!
26330 This bug does not affect bufferevents-based builds of Tor. Special
26331 thanks to "Vektor" for reporting this issue to us!
26333 This release also contains a few minor bugfixes for issues discovered
26337 - Fix a heap overflow bug that could occur when trying to pull
26338 data into the first chunk of a buffer, when that chunk had
26339 already had some data drained from it. Fixes CVE-2011-2778;
26340 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26343 - If we can't attach streams to a rendezvous circuit when we
26344 finish connecting to a hidden service, clear the rendezvous
26345 circuit's stream-isolation state and try to attach streams
26346 again. Previously, we cleared rendezvous circuits' isolation
26347 state either too early (if they were freshly built) or not at all
26348 (if they had been built earlier and were cannibalized). Bugfix on
26349 0.2.3.3-alpha; fixes bug 4655.
26350 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
26351 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
26352 - Fix an assertion failure when a relay with accounting enabled
26353 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
26356 - Update to the December 6 2011 Maxmind GeoLite Country database.
26359 Changes in version 0.2.2.35 - 2011-12-16
26360 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
26361 buffers code. Absolutely everybody should upgrade.
26363 The bug relied on an incorrect calculation when making data continuous
26364 in one of our IO buffers, if the first chunk of the buffer was
26365 misaligned by just the wrong amount. The miscalculation would allow an
26366 attacker to overflow a piece of heap-allocated memory. To mount this
26367 attack, the attacker would need to either open a SOCKS connection to
26368 Tor's SocksPort (usually restricted to localhost), or target a Tor
26369 instance configured to make its connections through a SOCKS proxy
26370 (which Tor does not do by default).
26372 Good security practice requires that all heap-overflow bugs should be
26373 presumed to be exploitable until proven otherwise, so we are treating
26374 this as a potential code execution attack. Please upgrade immediately!
26375 This bug does not affect bufferevents-based builds of Tor. Special
26376 thanks to "Vektor" for reporting this issue to us!
26378 Tor 0.2.2.35 also fixes several bugs in previous versions, including
26379 crash bugs for unusual configurations, and a long-term bug that
26380 would prevent Tor from starting on Windows machines with draconian
26383 With this release, we remind everyone that 0.2.0.x has reached its
26384 formal end-of-life. Those Tor versions have many known flaws, and
26385 nobody should be using them. You should upgrade -- ideally to the
26386 0.2.2.x series. If you're using a Linux or BSD and its packages are
26387 obsolete, stop using those packages and upgrade anyway.
26389 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
26390 longer receive support after some time in early 2012.
26393 - Fix a heap overflow bug that could occur when trying to pull
26394 data into the first chunk of a buffer, when that chunk had
26395 already had some data drained from it. Fixes CVE-2011-2778;
26396 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26397 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
26398 that it doesn't attempt to allocate a socketpair. This could cause
26399 some problems on Windows systems with overzealous firewalls. Fix for
26400 bug 4457; workaround for Libevent versions 2.0.1-alpha through
26402 - If we mark an OR connection for close based on a cell we process,
26403 don't process any further cells on it. We already avoid further
26404 reads on marked-for-close connections, but now we also discard the
26405 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
26406 which was the first version where we might mark a connection for
26407 close based on processing a cell on it.
26408 - Correctly sanity-check that we don't underflow on a memory
26409 allocation (and then assert) for hidden service introduction
26410 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26411 bugfix on 0.2.1.5-alpha.
26412 - Fix a memory leak when we check whether a hidden service
26413 descriptor has any usable introduction points left. Fixes bug
26414 4424. Bugfix on 0.2.2.25-alpha.
26415 - Don't crash when we're running as a relay and don't have a GeoIP
26416 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
26417 we've had in the 0.2.3.x branch already.
26418 - When running as a client, do not print a misleading (and plain
26419 wrong) log message that we're collecting "directory request"
26420 statistics: clients don't collect statistics. Also don't create a
26421 useless (because empty) stats file in the stats/ directory. Fixes
26422 bug 4353; bugfix on 0.2.2.34.
26425 - Detect failure to initialize Libevent. This fix provides better
26426 detection for future instances of bug 4457.
26427 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26428 function. This was eating up hideously large amounts of time on some
26429 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26430 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26431 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26433 - Don't warn about unused log_mutex in log.c when building with
26434 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26435 0.1.0.6-rc which introduced --disable-threads.
26436 - When configuring, starting, or stopping an NT service, stop
26437 immediately after the service configuration attempt has succeeded
26438 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
26439 - When sending a NETINFO cell, include the original address
26440 received for the other side, not its canonical address. Found
26441 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
26442 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
26443 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
26444 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
26445 occurred when a client tried to fetch a descriptor for a bridge
26446 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
26447 - Backport fixes for a pair of compilation warnings on Windows.
26448 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
26449 - If we had ever tried to call tor_addr_to_str on an address of
26450 unknown type, we would have done a strdup on an uninitialized
26451 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26452 Reported by "troll_un".
26453 - Correctly detect and handle transient lookup failures from
26454 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26455 Reported by "troll_un".
26456 - Fix null-pointer access that could occur if TLS allocation failed.
26457 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26458 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26459 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26462 - Add two new config options for directory authorities:
26463 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
26464 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
26465 that is always sufficient to satisfy the bandwidth requirement for
26466 the Guard flag. Now it will be easier for researchers to simulate
26467 Tor networks with different values. Resolves ticket 4484.
26468 - When Tor ignores a hidden service specified in its configuration,
26469 include the hidden service's directory in the warning message.
26470 Previously, we would only tell the user that some hidden service
26471 was ignored. Bugfix on 0.0.6; fixes bug 4426.
26472 - Update to the December 6 2011 Maxmind GeoLite Country database.
26474 o Packaging changes:
26475 - Make it easier to automate expert package builds on Windows,
26476 by removing an absolute path from makensis.exe command.
26479 Changes in version 0.2.1.32 - 2011-12-16
26480 Tor 0.2.1.32 backports important security and privacy fixes for
26481 oldstable. This release is intended only for package maintainers and
26482 others who cannot use the 0.2.2 stable series. All others should be
26483 using Tor 0.2.2.x or newer.
26485 The Tor 0.2.1.x series will reach formal end-of-life some time in
26486 early 2012; we will stop releasing patches for it then.
26488 o Major bugfixes (also included in 0.2.2.x):
26489 - Correctly sanity-check that we don't underflow on a memory
26490 allocation (and then assert) for hidden service introduction
26491 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26492 bugfix on 0.2.1.5-alpha.
26493 - Fix a heap overflow bug that could occur when trying to pull
26494 data into the first chunk of a buffer, when that chunk had
26495 already had some data drained from it. Fixes CVE-2011-2778;
26496 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
26499 - Update to the December 6 2011 Maxmind GeoLite Country database.
26502 Changes in version 0.2.3.9-alpha - 2011-12-08
26503 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
26504 a "DisableNetwork" security feature that bundles can use to avoid
26505 touching the network until bridges are configured, moves forward on
26506 the pluggable transport design, fixes a flaw in the hidden service
26507 design that unnecessarily prevented clients with wrong clocks from
26508 reaching hidden services, and fixes a wide variety of other issues.
26511 - Clients can now connect to private bridges over IPv6. Bridges
26512 still need at least one IPv4 address in order to connect to
26513 other relays. Note that we don't yet handle the case where the
26514 user has two bridge lines for the same bridge (one IPv4, one
26515 IPv6). Implements parts of proposal 186.
26516 - New "DisableNetwork" config option to prevent Tor from launching any
26517 connections or accepting any connections except on a control port.
26518 Bundles and controllers can set this option before letting Tor talk
26519 to the rest of the network, for example to prevent any connections
26520 to a non-bridge address. Packages like Orbot can also use this
26521 option to instruct Tor to save power when the network is off.
26522 - Clients and bridges can now be configured to use a separate
26523 "transport" proxy. This approach makes the censorship arms race
26524 easier by allowing bridges to use protocol obfuscation plugins. It
26525 implements the "managed proxy" part of proposal 180 (ticket 3472).
26526 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
26527 implementation. It makes AES_CTR about 7% faster than our old one
26528 (which was about 10% faster than the one OpenSSL used to provide).
26529 Resolves ticket 4526.
26530 - Add a "tor2web mode" for clients that want to connect to hidden
26531 services non-anonymously (and possibly more quickly). As a safety
26532 measure to try to keep users from turning this on without knowing
26533 what they are doing, tor2web mode must be explicitly enabled at
26534 compile time, and a copy of Tor compiled to run in tor2web mode
26535 cannot be used as a normal Tor client. Implements feature 2553.
26536 - Add experimental support for running on Windows with IOCP and no
26537 kernel-space socket buffers. This feature is controlled by a new
26538 "UserspaceIOCPBuffers" config option (off by default), which has
26539 no effect unless Tor has been built with support for bufferevents,
26540 is running on Windows, and has enabled IOCP. This may, in the long
26541 run, help solve or mitigate bug 98.
26542 - Use a more secure consensus parameter voting algorithm. Now at
26543 least three directory authorities or a majority of them must
26544 vote on a given parameter before it will be included in the
26545 consensus. Implements proposal 178.
26548 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
26549 They used to check that the timestamp was within 30 minutes
26550 of their system clock, so they could cap the size of their
26551 replay-detection cache, but that approach unnecessarily refused
26552 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
26553 the v3 intro-point protocol (the first one which sent a timestamp
26554 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
26555 - Only use the EVP interface when AES acceleration is enabled,
26556 to avoid a 5-7% performance regression. Resolves issue 4525;
26557 bugfix on 0.2.3.8-alpha.
26559 o Privacy/anonymity features (bridge detection):
26560 - Make bridge SSL certificates a bit more stealthy by using random
26561 serial numbers, in the same fashion as OpenSSL when generating
26562 self-signed certificates. Implements ticket 4584.
26563 - Introduce a new config option "DynamicDHGroups", enabled by
26564 default, which provides each bridge with a unique prime DH modulus
26565 to be used during SSL handshakes. This option attempts to help
26566 against censors who might use the Apache DH modulus as a static
26567 identifier for bridges. Addresses ticket 4548.
26569 o Minor features (new/different config options):
26570 - New configuration option "DisableDebuggerAttachment" (on by default)
26571 to prevent basic debugging attachment attempts by other processes.
26572 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
26573 - Allow MapAddress directives to specify matches against super-domains,
26574 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
26575 Implements issue 933.
26576 - Slightly change behavior of "list" options (that is, config
26577 options that can appear more than once) when they appear both in
26578 torrc and on the command line. Previously, the command-line options
26579 would be appended to the ones from torrc. Now, the command-line
26580 options override the torrc options entirely. This new behavior
26581 allows the user to override list options (like exit policies and
26582 ports to listen on) from the command line, rather than simply
26583 appending to the list.
26584 - You can get the old (appending) command-line behavior for "list"
26585 options by prefixing the option name with a "+".
26586 - You can remove all the values for a "list" option from the command
26587 line without adding any new ones by prefixing the option name
26589 - Add experimental support for a "defaults" torrc file to be parsed
26590 before the regular torrc. Torrc options override the defaults file's
26591 options in the same way that the command line overrides the torrc.
26592 The SAVECONF controller command saves only those options which
26593 differ between the current configuration and the defaults file. HUP
26594 reloads both files. (Note: This is an experimental feature; its
26595 behavior will probably be refined in future 0.2.3.x-alpha versions
26596 to better meet packagers' needs.) Implements task 4552.
26599 - Try to make the introductory warning message that Tor prints on
26600 startup more useful for actually finding help and information.
26601 Resolves ticket 2474.
26602 - Running "make version" now displays the version of Tor that
26603 we're about to build. Idea from katmagic; resolves issue 4400.
26604 - Expire old or over-used hidden service introduction points.
26605 Required by fix for bug 3460.
26606 - Move the replay-detection cache for the RSA-encrypted parts of
26607 INTRODUCE2 cells to the introduction point data structures.
26608 Previously, we would use one replay-detection cache per hidden
26609 service. Required by fix for bug 3460.
26610 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
26611 public key replay-detection cache from 60 minutes to 5 minutes. This
26612 replay-detection cache is now used only to detect multiple
26613 INTRODUCE2 cells specifying the same rendezvous point, so we can
26614 avoid launching multiple simultaneous attempts to connect to it.
26616 o Minor bugfixes (on Tor 0.2.2.x and earlier):
26617 - Resolve an integer overflow bug in smartlist_ensure_capacity().
26618 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
26620 - Fix a minor formatting issue in one of tor-gencert's error messages.
26622 - Prevent a false positive from the check-spaces script, by disabling
26623 the "whitespace between function name and (" check for functions
26625 - Fix a log message suggesting that people contact a non-existent
26626 email address. Fixes bug 3448.
26627 - Fix null-pointer access that could occur if TLS allocation failed.
26628 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
26629 - Report a real bootstrap problem to the controller on router
26630 identity mismatch. Previously we just said "foo", which probably
26631 made a lot of sense at the time. Fixes bug 4169; bugfix on
26633 - If we had ever tried to call tor_addr_to_str() on an address of
26634 unknown type, we would have done a strdup() on an uninitialized
26635 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
26636 Reported by "troll_un".
26637 - Correctly detect and handle transient lookup failures from
26638 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
26639 Reported by "troll_un".
26640 - Use tor_socket_t type for listener argument to accept(). Fixes bug
26641 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
26642 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
26643 bug 4532; found by "troll_un".
26645 o Minor bugfixes (on Tor 0.2.3.x):
26646 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
26648 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
26649 circuit for use as a hidden service client's rendezvous point.
26650 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
26651 with help from wanoskarnet.
26652 - Restore behavior of overriding SocksPort, ORPort, and similar
26653 options from the command line. Bugfix on 0.2.3.3-alpha.
26656 - Properly handle the case where the build-tree is not the same
26657 as the source tree when generating src/common/common_sha1.i,
26658 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
26659 bugfix on 0.2.0.1-alpha.
26661 o Code simplifications, cleanups, and refactorings:
26662 - Remove the pure attribute from all functions that used it
26663 previously. In many cases we assigned it incorrectly, because the
26664 functions might assert or call impure functions, and we don't have
26665 evidence that keeping the pure attribute is worthwhile. Implements
26666 changes suggested in ticket 4421.
26667 - Remove some dead code spotted by coverity. Fixes cid 432.
26668 Bugfix on 0.2.3.1-alpha, closes bug 4637.
26671 Changes in version 0.2.3.8-alpha - 2011-11-22
26672 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
26673 socketpair-related bug that has been bothering Windows users. It adds
26674 support to serve microdescriptors to controllers, so Vidalia's network
26675 map can resume listing relays (once Vidalia implements its side),
26676 and adds better support for hardware AES acceleration. Finally, it
26677 starts the process of adjusting the bandwidth cutoff for getting the
26678 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
26679 that tiny relays harm performance more than they help network capacity.
26682 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
26683 that it doesn't attempt to allocate a socketpair. This could cause
26684 some problems on Windows systems with overzealous firewalls. Fix for
26685 bug 4457; workaround for Libevent versions 2.0.1-alpha through
26687 - Correctly sanity-check that we don't underflow on a memory
26688 allocation (and then assert) for hidden service introduction
26689 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
26690 bugfix on 0.2.1.5-alpha.
26691 - Remove the artificially low cutoff of 20KB to guarantee the Fast
26692 flag. In the past few years the average relay speed has picked
26693 up, and while the "top 7/8 of the network get the Fast flag" and
26694 "all relays with 20KB or more of capacity get the Fast flag" rules
26695 used to have the same result, now the top 7/8 of the network has
26696 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
26697 - Fix a rare assertion failure when checking whether a v0 hidden
26698 service descriptor has any usable introduction points left, and
26699 we don't have enough information to build a circuit to the first
26700 intro point named in the descriptor. The HS client code in
26701 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
26702 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
26703 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
26704 - Make bridge authorities not crash when they are asked for their own
26705 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
26706 - When running as a client, do not print a misleading (and plain
26707 wrong) log message that we're collecting "directory request"
26708 statistics: clients don't collect statistics. Also don't create a
26709 useless (because empty) stats file in the stats/ directory. Fixes
26710 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
26713 - Allow Tor controllers like Vidalia to obtain the microdescriptor
26714 for a relay by identity digest or nickname. Previously,
26715 microdescriptors were only available by their own digests, so a
26716 controller would have to ask for and parse the whole microdescriptor
26717 consensus in order to look up a single relay's microdesc. Fixes
26718 bug 3832; bugfix on 0.2.3.1-alpha.
26719 - Use OpenSSL's EVP interface for AES encryption, so that all AES
26720 operations can use hardware acceleration (if present). Resolves
26723 o Minor bugfixes (on 0.2.2.x and earlier):
26724 - Detect failure to initialize Libevent. This fix provides better
26725 detection for future instances of bug 4457.
26726 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
26727 function. This was eating up hideously large amounts of time on some
26728 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
26729 - Don't warn about unused log_mutex in log.c when building with
26730 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
26731 0.1.0.6-rc which introduced --disable-threads.
26732 - Allow manual 'authenticate' commands to the controller interface
26733 from netcat (nc) as well as telnet. We were rejecting them because
26734 they didn't come with the expected whitespace at the end of the
26735 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
26736 - Fix some (not actually triggerable) buffer size checks in usage of
26737 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
26739 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
26740 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
26741 - When configuring, starting, or stopping an NT service, stop
26742 immediately after the service configuration attempt has succeeded
26743 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
26744 - When sending a NETINFO cell, include the original address
26745 received for the other side, not its canonical address. Found
26746 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
26747 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
26748 can pick them up when the tests aren't disabled. Bugfix on
26749 0.2.2.4-alpha which introduced tinytest.
26750 - Fix a memory leak when we check whether a hidden service
26751 descriptor has any usable introduction points left. Fixes bug
26752 4424. Bugfix on 0.2.2.25-alpha.
26753 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
26754 occurred when a client tried to fetch a descriptor for a bridge
26755 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
26757 o Minor bugfixes (on 0.2.3.x):
26758 - Make util unit tests build correctly with MSVC. Bugfix on
26759 0.2.3.3-alpha. Patch by Gisle Vanem.
26760 - Successfully detect AUTH_CHALLENGE cells with no recognized
26761 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
26762 Found by frosty_un.
26763 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
26764 it should still send a NETINFO cell to allow the connection to
26765 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
26767 - Log less loudly when we get an invalid authentication certificate
26768 from a source other than a directory authority: it's not unusual
26769 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
26771 - Tolerate servers with more clock skew in their authentication
26772 certificates than previously. Fixes bug 4371; bugfix on
26774 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
26775 on 0.2.3.4-alpha and 0.2.3.6-alpha.
26778 - Add two new config options for directory authorities:
26779 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
26780 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
26781 that is always sufficient to satisfy the bandwidth requirement for
26782 the Guard flag. Now it will be easier for researchers to simulate
26783 Tor networks with different values. Resolves ticket 4484.
26784 - When Tor ignores a hidden service specified in its configuration,
26785 include the hidden service's directory in the warning message.
26786 Previously, we would only tell the user that some hidden service
26787 was ignored. Bugfix on 0.0.6; fixes bug 4426.
26788 - When we fail to initialize Libevent, retry with IOCP disabled so we
26789 don't need to turn on multi-threading support in Libevent, which in
26790 turn requires a working socketpair(). This is a workaround for bug
26791 4457, which affects Libevent versions from 2.0.1-alpha through
26793 - Detect when we try to build on a platform that doesn't define
26794 AF_UNSPEC to 0. We don't work there, so refuse to compile.
26795 - Update to the November 1 2011 Maxmind GeoLite Country database.
26797 o Packaging changes:
26798 - Make it easier to automate expert package builds on Windows,
26799 by removing an absolute path from makensis.exe command.
26801 o Code simplifications and refactoring:
26802 - Remove some redundant #include directives throughout the code.
26803 Patch from Andrea Gelmini.
26804 - Unconditionally use OpenSSL's AES implementation instead of our
26805 old built-in one. OpenSSL's AES has been better for a while, and
26806 relatively few servers should still be on any version of OpenSSL
26807 that doesn't have good optimized assembly AES.
26808 - Use the name "CERTS" consistently to refer to the new cell type;
26809 we were calling it CERT in some places and CERTS in others.
26812 - Numerous new unit tests for functions in util.c and address.c by
26814 - The long-disabled benchmark tests are now split into their own
26815 ./src/test/bench binary.
26816 - The benchmark tests can now use more accurate timers than
26817 gettimeofday() when such timers are available.
26820 Changes in version 0.2.3.7-alpha - 2011-10-30
26821 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
26822 the new v3 handshake. It also resolves yet another bridge address
26826 - If we mark an OR connection for close based on a cell we process,
26827 don't process any further cells on it. We already avoid further
26828 reads on marked-for-close connections, but now we also discard the
26829 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
26830 which was the first version where we might mark a connection for
26831 close based on processing a cell on it.
26832 - Fix a double-free bug that would occur when we received an invalid
26833 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
26834 bugfix on 0.2.3.6-alpha.
26835 - Bridges no longer include their address in NETINFO cells on outgoing
26836 OR connections, to allow them to blend in better with clients.
26837 Removes another avenue for enumerating bridges. Reported by
26838 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
26839 cells were introduced.
26842 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
26843 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
26846 Changes in version 0.2.3.6-alpha - 2011-10-26
26847 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
26848 anonymity vulnerability where an attacker can deanonymize Tor
26849 users. Everybody should upgrade.
26851 This release also features support for a new v3 connection handshake
26852 protocol, and fixes to make hidden service connections more robust.
26855 - Implement a new handshake protocol (v3) for authenticating Tors to
26856 each other over TLS. It should be more resistant to fingerprinting
26857 than previous protocols, and should require less TLS hacking for
26858 future Tor implementations. Implements proposal 176.
26859 - Allow variable-length padding cells to disguise the length of
26860 Tor's TLS records. Implements part of proposal 184.
26862 o Privacy/anonymity fixes (clients):
26863 - Clients and bridges no longer send TLS certificate chains on
26864 outgoing OR connections. Previously, each client or bridge would
26865 use the same cert chain for all outgoing OR connections until
26866 its IP address changes, which allowed any relay that the client
26867 or bridge contacted to determine which entry guards it is using.
26868 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26869 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26870 no longer considers that connection as suitable for satisfying a
26871 circuit EXTEND request. Now relays can protect clients from the
26872 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26873 - Directory authorities no longer assign the Guard flag to relays
26874 that haven't upgraded to the above "refuse EXTEND requests
26875 to client connections" fix. Now directory authorities can
26876 protect clients from the CVE-2011-2768 issue even if neither
26877 the clients nor the relays have upgraded yet. There's a new
26878 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
26879 to let us transition smoothly, else tomorrow there would be no
26882 o Major bugfixes (hidden services):
26883 - Improve hidden service robustness: when an attempt to connect to
26884 a hidden service ends, be willing to refetch its hidden service
26885 descriptors from each of the HSDir relays responsible for them
26886 immediately. Previously, we would not consider refetching the
26887 service's descriptors from each HSDir for 15 minutes after the last
26888 fetch, which was inconvenient if the hidden service was not running
26889 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
26890 - When one of a hidden service's introduction points appears to be
26891 unreachable, stop trying it. Previously, we would keep trying
26892 to build circuits to the introduction point until we lost the
26893 descriptor, usually because the user gave up and restarted Tor.
26894 Partly fixes bug 3825.
26895 - Don't launch a useless circuit after failing to use one of a
26896 hidden service's introduction points. Previously, we would
26897 launch a new introduction circuit, but not set the hidden service
26898 which that circuit was intended to connect to, so it would never
26899 actually be used. A different piece of code would then create a
26900 new introduction circuit correctly. Bug reported by katmagic and
26901 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
26903 o Major bugfixes (other):
26904 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26905 that they initiated. Relays could distinguish incoming bridge
26906 connections from client connections, creating another avenue for
26907 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26908 Found by "frosty_un".
26909 - Don't update the AccountingSoftLimitHitAt state file entry whenever
26910 tor gets started. This prevents a wrong average bandwidth
26911 estimate, which would cause relays to always start a new accounting
26912 interval at the earliest possible moment. Fixes bug 2003; bugfix
26913 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
26914 immensely in tracking this bug down.
26915 - Fix a crash bug when changing node restrictions while a DNS lookup
26916 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
26919 o Minor bugfixes (on 0.2.2.x and earlier):
26920 - When a hidden service turns an extra service-side introduction
26921 circuit into a general-purpose circuit, free the rend_data and
26922 intro_key fields first, so we won't leak memory if the circuit
26923 is cannibalized for use as another service-side introduction
26924 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
26925 - Rephrase the log message emitted if the TestSocks check is
26926 successful. Patch from Fabian Keil; fixes bug 4094.
26927 - Bridges now skip DNS self-tests, to act a little more stealthily.
26928 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26929 bridges. Patch by "warms0x".
26930 - Remove a confusing dollar sign from the example fingerprint in the
26931 man page, and also make the example fingerprint a valid one. Fixes
26932 bug 4309; bugfix on 0.2.1.3-alpha.
26933 - Fix internal bug-checking logic that was supposed to catch
26934 failures in digest generation so that it will fail more robustly
26935 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26936 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26937 - Report any failure in init_keys() calls launched because our
26938 IP address has changed. Spotted by Coverity Scan. Bugfix on
26939 0.1.1.4-alpha; fixes CID 484.
26941 o Minor bugfixes (on 0.2.3.x):
26942 - Fix a bug in configure.in that kept it from building a configure
26943 script with autoconf versions earlier than 2.61. Fixes bug 2430;
26944 bugfix on 0.2.3.1-alpha.
26945 - Don't warn users that they are exposing a client port to the
26946 Internet if they have specified an RFC1918 address. Previously,
26947 we would warn if the user had specified any non-loopback
26948 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
26949 - Fix memory leaks in the failing cases of the new SocksPort and
26950 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
26951 fixes coverity CIDs 485, 486, and 487.
26954 - When a hidden service's introduction point times out, consider
26955 trying it again during the next attempt to connect to the
26956 HS. Previously, we would not try it again unless a newly fetched
26957 descriptor contained it. Required by fixes for bugs 1297 and 3825.
26958 - The next version of Windows will be called Windows 8, and it has
26959 a major version of 6, minor version of 2. Correctly identify that
26960 version instead of calling it "Very recent version". Resolves
26961 ticket 4153; reported by funkstar.
26962 - The Bridge Authority now writes statistics on how many bridge
26963 descriptors it gave out in total, and how many unique descriptors
26964 it gave out. It also lists how often the most and least commonly
26965 fetched descriptors were given out, as well as the median and
26966 25th/75th percentile. Implements tickets 4200 and 4294.
26967 - Update to the October 4 2011 Maxmind GeoLite Country database.
26969 o Code simplifications and refactoring:
26970 - Remove some old code to remember statistics about which descriptors
26971 we've served as a directory mirror. The feature wasn't used and
26972 is outdated now that microdescriptors are around.
26973 - Rename Tor functions that turn strings into addresses, so that
26974 "parse" indicates that no hostname resolution occurs, and
26975 "lookup" indicates that hostname resolution may occur. This
26976 should help prevent mistakes in the future. Fixes bug 3512.
26979 Changes in version 0.2.2.34 - 2011-10-26
26980 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
26981 can deanonymize Tor users. Everybody should upgrade.
26983 The attack relies on four components: 1) Clients reuse their TLS cert
26984 when talking to different relays, so relays can recognize a user by
26985 the identity key in her cert. 2) An attacker who knows the client's
26986 identity key can probe each guard relay to see if that identity key
26987 is connected to that guard relay right now. 3) A variety of active
26988 attacks in the literature (starting from "Low-Cost Traffic Analysis
26989 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
26990 discover the guard relays that a Tor user visiting the website is using.
26991 4) Clients typically pick three guards at random, so the set of guards
26992 for a given user could well be a unique fingerprint for her. This
26993 release fixes components #1 and #2, which is enough to block the attack;
26994 the other two remain as open research problems. Special thanks to
26995 "frosty_un" for reporting the issue to us!
26997 Clients should upgrade so they are no longer recognizable by the TLS
26998 certs they present. Relays should upgrade so they no longer allow a
26999 remote attacker to probe them to test whether unpatched clients are
27000 currently connected to them.
27002 This release also fixes several vulnerabilities that allow an attacker
27003 to enumerate bridge relays. Some bridge enumeration attacks still
27004 remain; see for example proposal 188.
27006 o Privacy/anonymity fixes (clients):
27007 - Clients and bridges no longer send TLS certificate chains on
27008 outgoing OR connections. Previously, each client or bridge would
27009 use the same cert chain for all outgoing OR connections until
27010 its IP address changes, which allowed any relay that the client
27011 or bridge contacted to determine which entry guards it is using.
27012 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27013 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27014 no longer considers that connection as suitable for satisfying a
27015 circuit EXTEND request. Now relays can protect clients from the
27016 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27017 - Directory authorities no longer assign the Guard flag to relays
27018 that haven't upgraded to the above "refuse EXTEND requests
27019 to client connections" fix. Now directory authorities can
27020 protect clients from the CVE-2011-2768 issue even if neither
27021 the clients nor the relays have upgraded yet. There's a new
27022 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
27023 to let us transition smoothly, else tomorrow there would be no
27026 o Privacy/anonymity fixes (bridge enumeration):
27027 - Bridge relays now do their directory fetches inside Tor TLS
27028 connections, like all the other clients do, rather than connecting
27029 directly to the DirPort like public relays do. Removes another
27030 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27031 - Bridges relays now build circuits for themselves in a more similar
27032 way to how clients build them. Removes another avenue for
27033 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27034 when bridges were introduced.
27035 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27036 that they initiated. Relays could distinguish incoming bridge
27037 connections from client connections, creating another avenue for
27038 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27039 Found by "frosty_un".
27042 - Fix a crash bug when changing node restrictions while a DNS lookup
27043 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
27045 - Don't launch a useless circuit after failing to use one of a
27046 hidden service's introduction points. Previously, we would
27047 launch a new introduction circuit, but not set the hidden service
27048 which that circuit was intended to connect to, so it would never
27049 actually be used. A different piece of code would then create a
27050 new introduction circuit correctly. Bug reported by katmagic and
27051 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
27054 - Change an integer overflow check in the OpenBSD_Malloc code so
27055 that GCC is less likely to eliminate it as impossible. Patch
27056 from Mansour Moufid. Fixes bug 4059.
27057 - When a hidden service turns an extra service-side introduction
27058 circuit into a general-purpose circuit, free the rend_data and
27059 intro_key fields first, so we won't leak memory if the circuit
27060 is cannibalized for use as another service-side introduction
27061 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
27062 - Bridges now skip DNS self-tests, to act a little more stealthily.
27063 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
27064 bridges. Patch by "warms0x".
27065 - Fix internal bug-checking logic that was supposed to catch
27066 failures in digest generation so that it will fail more robustly
27067 if we ask for a nonexistent algorithm. Found by Coverity Scan.
27068 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
27069 - Report any failure in init_keys() calls launched because our
27070 IP address has changed. Spotted by Coverity Scan. Bugfix on
27071 0.1.1.4-alpha; fixes CID 484.
27073 o Minor bugfixes (log messages and documentation):
27074 - Remove a confusing dollar sign from the example fingerprint in the
27075 man page, and also make the example fingerprint a valid one. Fixes
27076 bug 4309; bugfix on 0.2.1.3-alpha.
27077 - The next version of Windows will be called Windows 8, and it has
27078 a major version of 6, minor version of 2. Correctly identify that
27079 version instead of calling it "Very recent version". Resolves
27080 ticket 4153; reported by funkstar.
27081 - Downgrade log messages about circuit timeout calibration from
27082 "notice" to "info": they don't require or suggest any human
27083 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27084 bugfix on 0.2.2.14-alpha.
27087 - Turn on directory request statistics by default and include them in
27088 extra-info descriptors. Don't break if we have no GeoIP database.
27089 Backported from 0.2.3.1-alpha; implements ticket 3951.
27090 - Update to the October 4 2011 Maxmind GeoLite Country database.
27093 Changes in version 0.2.1.31 - 2011-10-26
27094 Tor 0.2.1.31 backports important security and privacy fixes for
27095 oldstable. This release is intended only for package maintainers and
27096 others who cannot use the 0.2.2 stable series. All others should be
27097 using Tor 0.2.2.x or newer.
27099 o Security fixes (also included in 0.2.2.x):
27100 - Replace all potentially sensitive memory comparison operations
27101 with versions whose runtime does not depend on the data being
27102 compared. This will help resist a class of attacks where an
27103 adversary can use variations in timing information to learn
27104 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27105 implementation by Robert Ransom based partially on code by DJB.)
27106 - Fix an assert in parsing router descriptors containing IPv6
27107 addresses. This one took down the directory authorities when
27108 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27110 o Privacy/anonymity fixes (also included in 0.2.2.x):
27111 - Clients and bridges no longer send TLS certificate chains on
27112 outgoing OR connections. Previously, each client or bridge would
27113 use the same cert chain for all outgoing OR connections until
27114 its IP address changes, which allowed any relay that the client
27115 or bridge contacted to determine which entry guards it is using.
27116 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
27117 - If a relay receives a CREATE_FAST cell on a TLS connection, it
27118 no longer considers that connection as suitable for satisfying a
27119 circuit EXTEND request. Now relays can protect clients from the
27120 CVE-2011-2768 issue even if the clients haven't upgraded yet.
27121 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
27122 that they initiated. Relays could distinguish incoming bridge
27123 connections from client connections, creating another avenue for
27124 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
27125 Found by "frosty_un".
27126 - When receiving a hidden service descriptor, check that it is for
27127 the hidden service we wanted. Previously, Tor would store any
27128 hidden service descriptors that a directory gave it, whether it
27129 wanted them or not. This wouldn't have let an attacker impersonate
27130 a hidden service, but it did let directories pre-seed a client
27131 with descriptors that it didn't want. Bugfix on 0.0.6.
27132 - Avoid linkability based on cached hidden service descriptors: forget
27133 all hidden service descriptors cached as a client when processing a
27134 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27135 - Make the bridge directory authority refuse to answer directory
27136 requests for "all" descriptors. It used to include bridge
27137 descriptors in its answer, which was a major information leak.
27138 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27139 - Don't attach new streams to old rendezvous circuits after SIGNAL
27140 NEWNYM. Previously, we would keep using an existing rendezvous
27141 circuit if it remained open (i.e. if it were kept open by a
27142 long-lived stream, or if a new stream were attached to it before
27143 Tor could notice that it was old and no longer in use). Bugfix on
27144 0.1.1.15-rc; fixes bug 3375.
27146 o Minor bugfixes (also included in 0.2.2.x):
27147 - When we restart our relay, we might get a successful connection
27148 from the outside before we've started our reachability tests,
27149 triggering a warning: "ORPort found reachable, but I have no
27150 routerinfo yet. Failing to inform controller of success." This
27151 bug was harmless unless Tor is running under a controller
27152 like Vidalia, in which case the controller would never get a
27153 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27155 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
27156 enabled. Fixes bug 1526.
27157 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27158 anything since 0.2.1.16-rc.
27159 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27160 None of the cases where we did this before were wrong, but by making
27161 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27162 - Fix a rare crash bug that could occur when a client was configured
27163 with a large number of bridges. Fixes bug 2629; bugfix on
27164 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27165 - Correct the warning displayed when a rendezvous descriptor exceeds
27166 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27168 - Fix an uncommon assertion failure when running with DNSPort under
27169 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27170 - When warning about missing zlib development packages during compile,
27171 give the correct package names. Bugfix on 0.2.0.1-alpha.
27172 - Require that introduction point keys and onion keys have public
27173 exponent 65537. Bugfix on 0.2.0.10-alpha.
27174 - Do not crash when our configuration file becomes unreadable, for
27175 example due to a permissions change, between when we start up
27176 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27178 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27180 - Always NUL-terminate the sun_path field of a sockaddr_un before
27181 passing it to the kernel. (Not a security issue: kernels are
27182 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27183 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27184 - Don't stack-allocate the list of supplementary GIDs when we're
27185 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27186 could take up to 256K, which is way too much stack. Found by
27187 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27189 o Minor bugfixes (only in 0.2.1.x):
27190 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
27191 rely on them. Bugfix on 0.2.1.30.
27192 - Use git revisions instead of svn revisions when generating our
27193 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27195 o Minor features (also included in 0.2.2.x):
27196 - Adjust the expiration time on our SSL session certificates to
27197 better match SSL certs seen in the wild. Resolves ticket 4014.
27198 - Allow nameservers with IPv6 address. Resolves bug 2574.
27199 - Update to the October 4 2011 Maxmind GeoLite Country database.
27202 Changes in version 0.2.3.5-alpha - 2011-09-28
27203 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
27204 bridge relays; fixes an assertion error that many users started hitting
27205 today; and adds the ability to refill token buckets more often than
27206 once per second, allowing significant performance improvements.
27209 - Bridge relays now do their directory fetches inside Tor TLS
27210 connections, like all the other clients do, rather than connecting
27211 directly to the DirPort like public relays do. Removes another
27212 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
27213 - Bridges relays now build circuits for themselves in a more similar
27214 way to how clients build them. Removes another avenue for
27215 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
27216 when bridges were introduced.
27219 - Fix an "Assertion md->held_by_node == 1 failed" error that could
27220 occur when the same microdescriptor was referenced by two node_t
27221 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
27223 o Major features (networking):
27224 - Add a new TokenBucketRefillInterval option to refill token buckets
27225 more frequently than once per second. This should improve network
27226 performance, alleviate queueing problems, and make traffic less
27227 bursty. Implements proposal 183; closes ticket 3630. Design by
27228 Florian Tschorsch and Björn Scheuermann; implementation by
27232 - Change an integer overflow check in the OpenBSD_Malloc code so
27233 that GCC is less likely to eliminate it as impossible. Patch
27234 from Mansour Moufid. Fixes bug 4059.
27236 o Minor bugfixes (usability):
27237 - Downgrade log messages about circuit timeout calibration from
27238 "notice" to "info": they don't require or suggest any human
27239 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
27240 bugfix on 0.2.2.14-alpha.
27242 o Minor features (diagnostics):
27243 - When the system call to create a listener socket fails, log the
27244 error message explaining why. This may help diagnose bug 4027.
27247 Changes in version 0.2.3.4-alpha - 2011-09-13
27248 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
27249 tweak to Tor's TLS handshake that makes relays and bridges that run
27250 this new version reachable from Iran again. It also fixes a few new
27251 bugs in 0.2.3.x, and teaches relays to recognize when they're not
27252 listed in the network consensus and republish.
27254 o Major bugfixes (also part of 0.2.2.33):
27255 - Avoid an assertion failure when reloading a configuration with
27256 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27257 3923; bugfix on 0.2.2.25-alpha.
27259 o Minor features (security, also part of 0.2.2.33):
27260 - Check for replays of the public-key encrypted portion of an
27261 INTRODUCE1 cell, in addition to the current check for replays of
27262 the g^x value. This prevents a possible class of active attacks
27263 by an attacker who controls both an introduction point and a
27264 rendezvous point, and who uses the malleability of AES-CTR to
27265 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27266 that these attacks are infeasible (requiring the attacker to send
27267 on the order of zettabytes of altered cells in a short interval),
27268 but we'd rather block them off in case there are any classes of
27269 this attack that we missed. Reported by Willem Pinckaers.
27271 o Minor features (also part of 0.2.2.33):
27272 - Adjust the expiration time on our SSL session certificates to
27273 better match SSL certs seen in the wild. Resolves ticket 4014.
27274 - Change the default required uptime for a relay to be accepted as
27275 a HSDir (hidden service directory) from 24 hours to 25 hours.
27276 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27277 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27278 authorities to abstain from voting on assignment of the HSDir
27279 consensus flag. Related to bug 2649.
27280 - Update to the September 6 2011 Maxmind GeoLite Country database.
27282 o Minor bugfixes (also part of 0.2.2.33):
27283 - Demote the 'replay detected' log message emitted when a hidden
27284 service receives the same Diffie-Hellman public key in two different
27285 INTRODUCE2 cells to info level. A normal Tor client can cause that
27286 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27287 fixes part of bug 2442.
27288 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27289 level. There is nothing that a hidden service's operator can do
27290 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27292 - Clarify a log message specifying the characters permitted in
27293 HiddenServiceAuthorizeClient client names. Previously, the log
27294 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27295 given the impression that every ASCII character between "+" and "_"
27296 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27298 o Build fixes (also part of 0.2.2.33):
27299 - Clean up some code issues that prevented Tor from building on older
27300 BSDs. Fixes bug 3894; reported by "grarpamp".
27301 - Search for a platform-specific version of "ar" when cross-compiling.
27302 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27305 - Fix a bug where the SocksPort option (for example) would get
27306 ignored and replaced by the default if a SocksListenAddress
27307 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
27311 - Relays now try regenerating and uploading their descriptor more
27312 frequently if they are not listed in the consensus, or if the
27313 version of their descriptor listed in the consensus is too
27314 old. This fix should prevent situations where a server declines
27315 to re-publish itself because it has done so too recently, even
27316 though the authorities decided not to list its recent-enough
27317 descriptor. Fix for bug 3327.
27320 - Relays now include a reason for regenerating their descriptors
27321 in an HTTP header when uploading to the authorities. This will
27322 make it easier to debug descriptor-upload issues in the future.
27323 - When starting as root and then changing our UID via the User
27324 control option, and we have a ControlSocket configured, make sure
27325 that the ControlSocket is owned by the same account that Tor will
27326 run under. Implements ticket 3421; fix by Jérémy Bobbio.
27329 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
27330 utility function used in the control-port code). This shouldn't
27331 ever happen unless Tor is completely out of memory, but if it did
27332 happen and Tor somehow recovered from it, Tor could have sent a log
27333 message to a control port in the middle of a reply to a controller
27334 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
27335 - Make 'FetchUselessDescriptors' cause all descriptor types and
27336 all consensus types (including microdescriptors) to get fetched.
27337 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
27339 o Code refactoring:
27340 - Make a new "entry connection" struct as an internal subtype of "edge
27341 connection", to simplify the code and make exit connections smaller.
27344 Changes in version 0.2.2.33 - 2011-09-13
27345 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
27346 TLS handshake that makes relays and bridges that run this new version
27347 reachable from Iran again.
27350 - Avoid an assertion failure when reloading a configuration with
27351 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
27352 3923; bugfix on 0.2.2.25-alpha.
27354 o Minor features (security):
27355 - Check for replays of the public-key encrypted portion of an
27356 INTRODUCE1 cell, in addition to the current check for replays of
27357 the g^x value. This prevents a possible class of active attacks
27358 by an attacker who controls both an introduction point and a
27359 rendezvous point, and who uses the malleability of AES-CTR to
27360 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
27361 that these attacks are infeasible (requiring the attacker to send
27362 on the order of zettabytes of altered cells in a short interval),
27363 but we'd rather block them off in case there are any classes of
27364 this attack that we missed. Reported by Willem Pinckaers.
27367 - Adjust the expiration time on our SSL session certificates to
27368 better match SSL certs seen in the wild. Resolves ticket 4014.
27369 - Change the default required uptime for a relay to be accepted as
27370 a HSDir (hidden service directory) from 24 hours to 25 hours.
27371 Improves on 0.2.0.10-alpha; resolves ticket 2649.
27372 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
27373 authorities to abstain from voting on assignment of the HSDir
27374 consensus flag. Related to bug 2649.
27375 - Update to the September 6 2011 Maxmind GeoLite Country database.
27377 o Minor bugfixes (documentation and log messages):
27378 - Correct the man page to explain that HashedControlPassword and
27379 CookieAuthentication can both be set, in which case either method
27380 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27381 when we decided to allow these config options to both be set. Issue
27382 raised by bug 3898.
27383 - Demote the 'replay detected' log message emitted when a hidden
27384 service receives the same Diffie-Hellman public key in two different
27385 INTRODUCE2 cells to info level. A normal Tor client can cause that
27386 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
27387 fixes part of bug 2442.
27388 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
27389 level. There is nothing that a hidden service's operator can do
27390 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
27392 - Clarify a log message specifying the characters permitted in
27393 HiddenServiceAuthorizeClient client names. Previously, the log
27394 message said that "[A-Za-z0-9+-_]" were permitted; that could have
27395 given the impression that every ASCII character between "+" and "_"
27396 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
27399 - Provide a substitute implementation of lround() for MSVC, which
27400 apparently lacks it. Patch from Gisle Vanem.
27401 - Clean up some code issues that prevented Tor from building on older
27402 BSDs. Fixes bug 3894; reported by "grarpamp".
27403 - Search for a platform-specific version of "ar" when cross-compiling.
27404 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
27407 Changes in version 0.2.3.3-alpha - 2011-09-01
27408 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
27409 security, and provides client-side support for the microdescriptor
27410 and optimistic data features introduced earlier in the 0.2.3.x
27411 series. It also includes numerous critical bugfixes in the (optional)
27412 bufferevent-based networking backend.
27414 o Major features (stream isolation):
27415 - You can now configure Tor so that streams from different
27416 applications are isolated on different circuits, to prevent an
27417 attacker who sees your streams as they leave an exit node from
27418 linking your sessions to one another. To do this, choose some way
27419 to distinguish the applications: have them connect to different
27420 SocksPorts, or have one of them use SOCKS4 while the other uses
27421 SOCKS5, or have them pass different authentication strings to the
27422 SOCKS proxy. Then, use the new SocksPort syntax to configure the
27423 degree of isolation you need. This implements Proposal 171.
27424 - There's a new syntax for specifying multiple client ports (such as
27425 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
27426 multiple *Port entries with full addr:port syntax on each.
27427 The old *ListenAddress format is still supported, but you can't
27428 mix it with the new *Port syntax.
27430 o Major features (other):
27431 - Enable microdescriptor fetching by default for clients. This allows
27432 clients to download a much smaller amount of directory information.
27433 To disable it (and go back to the old-style consensus and
27434 descriptors), set "UseMicrodescriptors 0" in your torrc file.
27435 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
27436 "PortForwarding" config option), now supports Windows.
27437 - When using an exit relay running 0.2.3.x, clients can now
27438 "optimistically" send data before the exit relay reports that
27439 the stream has opened. This saves a round trip when starting
27440 connections where the client speaks first (such as web browsing).
27441 This behavior is controlled by a consensus parameter (currently
27442 disabled). To turn it on or off manually, use the "OptimisticData"
27443 torrc option. Implements proposal 181; code by Ian Goldberg.
27445 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
27446 - When using IOCP on Windows, we need to enable Libevent windows
27448 - The IOCP backend now works even when the user has not specified
27449 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
27450 Fixes part of bug 3752.
27451 - Correctly record the bytes we've read and written when using
27452 bufferevents, so that we can include them in our bandwidth history
27453 and advertised bandwidth. Fixes bug 3803.
27454 - Apply rate-limiting only at the bottom of a chain of filtering
27455 bufferevents. This prevents us from filling up internal read
27456 buffers and violating rate-limits when filtering bufferevents
27457 are enabled. Fixes part of bug 3804.
27458 - Add high-watermarks to the output buffers for filtered
27459 bufferevents. This prevents us from filling up internal write
27460 buffers and wasting CPU cycles when filtering bufferevents are
27461 enabled. Fixes part of bug 3804.
27462 - Correctly notice when data has been written from a bufferevent
27463 without flushing it completely. Fixes bug 3805.
27464 - Fix a bug where server-side tunneled bufferevent-based directory
27465 streams would get closed prematurely. Fixes bug 3814.
27466 - Fix a use-after-free error with per-connection rate-limiting
27467 buckets. Fixes bug 3888.
27469 o Major bugfixes (also part of 0.2.2.31-rc):
27470 - If we're configured to write our ControlPorts to disk, only write
27471 them after switching UID and creating the data directory. This way,
27472 we don't fail when starting up with a nonexistent DataDirectory
27473 and a ControlPortWriteToFile setting based on that directory. Fixes
27474 bug 3747; bugfix on Tor 0.2.2.26-beta.
27477 - Added a new CONF_CHANGED event so that controllers can be notified
27478 of any configuration changes made by other controllers, or by the
27479 user. Implements ticket 1692.
27480 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
27481 leak when using bufferevents, and lets Libevent worry about how to
27482 best copy data out of a buffer.
27483 - Replace files in stats/ rather than appending to them. Now that we
27484 include statistics in extra-info descriptors, it makes no sense to
27485 keep old statistics forever. Implements ticket 2930.
27487 o Minor features (build compatibility):
27488 - Limited, experimental support for building with nmake and MSVC.
27489 - Provide a substitute implementation of lround() for MSVC, which
27490 apparently lacks it. Patch from Gisle Vanem.
27492 o Minor features (also part of 0.2.2.31-rc):
27493 - Update to the August 2 2011 Maxmind GeoLite Country database.
27495 o Minor bugfixes (on 0.2.3.x-alpha):
27496 - Fix a spurious warning when parsing SOCKS requests with
27497 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
27498 - Get rid of a harmless warning that could happen on relays running
27499 with bufferevents. The warning was caused by someone doing an http
27500 request to a relay's orport. Also don't warn for a few related
27501 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
27503 o Minor bugfixes (on 2.2.x and earlier):
27504 - Correct the man page to explain that HashedControlPassword and
27505 CookieAuthentication can both be set, in which case either method
27506 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
27507 when we decided to allow these config options to both be set. Issue
27508 raised by bug 3898.
27509 - The "--quiet" and "--hush" options now apply not only to Tor's
27510 behavior before logs are configured, but also to Tor's behavior in
27511 the absence of configured logs. Fixes bug 3550; bugfix on
27514 o Minor bugfixes (also part of 0.2.2.31-rc):
27515 - Write several files in text mode, on OSes that distinguish text
27516 mode from binary mode (namely, Windows). These files are:
27517 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27518 that collect those statistics; 'client_keys' and 'hostname' for
27519 hidden services that use authentication; and (in the tor-gencert
27520 utility) newly generated identity and signing keys. Previously,
27521 we wouldn't specify text mode or binary mode, leading to an
27522 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27523 the DirRecordUsageByCountry option which would have triggered
27524 the assertion failure was added), although this assertion failure
27525 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27526 - Selectively disable deprecation warnings on OS X because Lion
27527 started deprecating the shipped copy of openssl. Fixes bug 3643.
27528 - Remove an extra pair of quotation marks around the error
27529 message in control-port STATUS_GENERAL BUG events. Bugfix on
27530 0.1.2.6-alpha; fixes bug 3732.
27531 - When unable to format an address as a string, report its value
27532 as "???" rather than reusing the last formatted address. Bugfix
27535 o Code simplifications and refactoring:
27536 - Rewrite the listener-selection logic so that parsing which ports
27537 we want to listen on is now separate from binding to the ports
27541 - Building Tor with bufferevent support now requires Libevent
27542 2.0.13-stable or later. Previous versions of Libevent had bugs in
27543 SSL-related bufferevents and related issues that would make Tor
27544 work badly with bufferevents. Requiring 2.0.13-stable also allows
27545 Tor with bufferevents to take advantage of Libevent APIs
27546 introduced after 2.0.8-rc.
27549 Changes in version 0.2.2.32 - 2011-08-27
27550 The Tor 0.2.2 release series is dedicated to the memory of Andreas
27551 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
27552 a founder of the PETS community, a leader in our field, a mentor,
27553 and a friend. He left us with these words: "I had the possibility
27554 to contribute to this world that is not as it should be. I hope I
27555 could help in some areas to make the world a better place, and that
27556 I could also encourage other people to be engaged in improving the
27557 world. Please, stay engaged. This world needs you, your love, your
27558 initiative -- now I cannot be part of that anymore."
27560 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
27561 ready. More than two years in the making, this release features improved
27562 client performance and hidden service reliability, better compatibility
27563 for Android, correct behavior for bridges that listen on more than
27564 one address, more extensible and flexible directory object handling,
27565 better reporting of network statistics, improved code security, and
27566 many many other features and bugfixes.
27569 Changes in version 0.2.2.31-rc - 2011-08-17
27570 Tor 0.2.2.31-rc is the second and hopefully final release candidate
27571 for the Tor 0.2.2.x series.
27574 - Remove an extra pair of quotation marks around the error
27575 message in control-port STATUS_GENERAL BUG events. Bugfix on
27576 0.1.2.6-alpha; fixes bug 3732.
27577 - If we're configured to write our ControlPorts to disk, only write
27578 them after switching UID and creating the data directory. This way,
27579 we don't fail when starting up with a nonexistent DataDirectory
27580 and a ControlPortWriteToFile setting based on that directory. Fixes
27581 bug 3747; bugfix on Tor 0.2.2.26-beta.
27584 - Update to the August 2 2011 Maxmind GeoLite Country database.
27587 - Allow GETINFO fingerprint to return a fingerprint even when
27588 we have not yet built a router descriptor. Fixes bug 3577;
27589 bugfix on 0.2.0.1-alpha.
27590 - Write several files in text mode, on OSes that distinguish text
27591 mode from binary mode (namely, Windows). These files are:
27592 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
27593 that collect those statistics; 'client_keys' and 'hostname' for
27594 hidden services that use authentication; and (in the tor-gencert
27595 utility) newly generated identity and signing keys. Previously,
27596 we wouldn't specify text mode or binary mode, leading to an
27597 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
27598 the DirRecordUsageByCountry option which would have triggered
27599 the assertion failure was added), although this assertion failure
27600 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
27601 - Selectively disable deprecation warnings on OS X because Lion
27602 started deprecating the shipped copy of openssl. Fixes bug 3643.
27603 - When unable to format an address as a string, report its value
27604 as "???" rather than reusing the last formatted address. Bugfix
27608 Changes in version 0.2.3.2-alpha - 2011-07-18
27609 Tor 0.2.3.2-alpha introduces two new experimental features:
27610 microdescriptors and pluggable transports. It also continues cleaning
27611 up a variety of recently introduced features.
27614 - Clients can now use microdescriptors instead of regular descriptors
27615 to build circuits. Microdescriptors are authority-generated
27616 summaries of regular descriptors' contents, designed to change
27617 very rarely (see proposal 158 for details). This feature is
27618 designed to save bandwidth, especially for clients on slow internet
27619 connections. It's off by default for now, since nearly no caches
27620 support it, but it will be on-by-default for clients in a future
27621 version. You can use the UseMicrodescriptors option to turn it on.
27622 - Tor clients using bridges can now be configured to use a separate
27623 'transport' proxy for each bridge. This approach helps to resist
27624 censorship by allowing bridges to use protocol obfuscation
27625 plugins. It implements part of proposal 180. Implements ticket 2841.
27626 - While we're trying to bootstrap, record how many TLS connections
27627 fail in each state, and report which states saw the most failures
27628 in response to any bootstrap failures. This feature may speed up
27629 diagnosis of censorship events. Implements ticket 3116.
27631 o Major bugfixes (on 0.2.3.1-alpha):
27632 - When configuring a large set of nodes in EntryNodes (as with
27633 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
27634 random subset to be guards, and choose them in random
27635 order. Fixes bug 2798.
27636 - Tor could crash when remembering a consensus in a non-used consensus
27637 flavor without having a current consensus set. Fixes bug 3361.
27638 - Comparing an unknown address to a microdescriptor's shortened exit
27639 policy would always give a "rejected" result. Fixes bug 3599.
27640 - Using microdescriptors as a client no longer prevents Tor from
27641 uploading and downloading hidden service descriptors. Fixes
27645 - Allow nameservers with IPv6 address. Resolves bug 2574.
27646 - Accept attempts to include a password authenticator in the
27647 handshake, as supported by SOCKS5. This handles SOCKS clients that
27648 don't know how to omit a password when authenticating. Resolves
27650 - When configuring a large set of nodes in EntryNodes, and there are
27651 enough of them listed as Guard so that we don't need to consider
27652 the non-guard entries, prefer the ones listed with the Guard flag.
27653 - Check for and recover from inconsistency in the microdescriptor
27654 cache. This will make it harder for us to accidentally free a
27655 microdescriptor without removing it from the appropriate data
27656 structures. Fixes issue 3135; issue noted by "wanoskarnet".
27657 - Log SSL state transitions at log level DEBUG, log domain
27658 HANDSHAKE. This can be useful for debugging censorship events.
27659 Implements ticket 3264.
27660 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
27661 implements ticket 3439.
27663 o Minor bugfixes (on 0.2.3.1-alpha):
27664 - Do not free all general-purpose regular descriptors just
27665 because microdescriptor use is enabled. Fixes bug 3113.
27666 - Correctly link libevent_openssl when --enable-static-libevent
27667 is passed to configure. Fixes bug 3118.
27668 - Bridges should not complain during their heartbeat log messages that
27669 they are unlisted in the consensus: that's more or less the point
27670 of being a bridge. Fixes bug 3183.
27671 - Report a SIGNAL event to controllers when acting on a delayed
27672 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
27673 event to the controller if we acted on a SIGNAL NEWNYM command
27674 immediately, and otherwise not report a SIGNAL event for the
27675 command at all. Fixes bug 3349.
27676 - Fix a crash when handling the SIGNAL controller command or
27677 reporting ERR-level status events with bufferevents enabled. Found
27678 by Robert Ransom. Fixes bug 3367.
27679 - Always ship the tor-fw-helper manpage in our release tarballs.
27680 Fixes bug 3389. Reported by Stephen Walker.
27681 - Fix a class of double-mark-for-close bugs when bufferevents
27682 are enabled. Fixes bug 3403.
27683 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
27684 - Add SIGNAL to the list returned by the 'GETINFO events/names'
27685 control-port command. Fixes part of bug 3465.
27686 - Prevent using negative indices during unit test runs when read_all()
27687 fails. Spotted by coverity.
27688 - Fix a rare memory leak when checking the nodelist without it being
27689 present. Found by coverity.
27690 - Only try to download a microdescriptor-flavored consensus from
27691 a directory cache that provides them.
27693 o Minor bugfixes (on 0.2.2.x and earlier):
27694 - Assert that hidden-service-related operations are not performed
27695 using single-hop circuits. Previously, Tor would assert that
27696 client-side streams are not attached to single-hop circuits,
27697 but not that other sensitive operations on the client and service
27698 side are not performed using single-hop circuits. Fixes bug 3332;
27700 - Don't publish a new relay descriptor when we reload our onion key,
27701 unless the onion key has actually changed. Fixes bug 3263 and
27702 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
27703 - Allow GETINFO fingerprint to return a fingerprint even when
27704 we have not yet built a router descriptor. Fixes bug 3577;
27705 bugfix on 0.2.0.1-alpha.
27706 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
27707 on 0.2.2.4-alpha; fixes bug 3427.
27709 o Code simplification and refactoring:
27710 - Use tor_sscanf() in place of scanf() in more places through the
27711 code. This makes us a little more locale-independent, and
27712 should help shut up code-analysis tools that can't tell
27713 a safe sscanf string from a dangerous one.
27714 - Use tt_assert(), not tor_assert(), for checking for test failures.
27715 This makes the unit tests more able to go on in the event that
27717 - Split connection_about_to_close() into separate functions for each
27721 - On Windows, we now define the _WIN32_WINNT macros only if they
27722 are not already defined. This lets the person building Tor decide,
27723 if they want, to require a later version of Windows.
27726 Changes in version 0.2.2.30-rc - 2011-07-07
27727 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
27728 series. It fixes a few smaller bugs, but generally appears stable.
27729 Please test it and let us know whether it is!
27732 - Send a SUCCEEDED stream event to the controller when a reverse
27733 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
27734 discovered by katmagic.
27735 - Always NUL-terminate the sun_path field of a sockaddr_un before
27736 passing it to the kernel. (Not a security issue: kernels are
27737 smart enough to reject bad sockaddr_uns.) Found by Coverity;
27738 CID #428. Bugfix on Tor 0.2.0.3-alpha.
27739 - Don't stack-allocate the list of supplementary GIDs when we're
27740 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
27741 could take up to 256K, which is way too much stack. Found by
27742 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
27743 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
27744 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
27745 fixes part of bug 3465.
27746 - Fix a memory leak when receiving a descriptor for a hidden
27747 service we didn't ask for. Found by Coverity; CID #30. Bugfix
27751 - Update to the July 1 2011 Maxmind GeoLite Country database.
27754 Changes in version 0.2.2.29-beta - 2011-06-20
27755 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
27756 have bridge lines in their torrc but don't want to use them; gets
27757 us closer to having the control socket feature working on Debian;
27758 and fixes a variety of smaller bugs.
27761 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
27762 When we changed the default behavior to "use bridges if any
27763 are listed in the torrc", we surprised users who had bridges
27764 in their torrc files but who didn't actually want to use them.
27765 Partial resolution for bug 3354.
27768 - Don't attach new streams to old rendezvous circuits after SIGNAL
27769 NEWNYM. Previously, we would keep using an existing rendezvous
27770 circuit if it remained open (i.e. if it were kept open by a
27771 long-lived stream, or if a new stream were attached to it before
27772 Tor could notice that it was old and no longer in use). Bugfix on
27773 0.1.1.15-rc; fixes bug 3375.
27776 - Fix a bug when using ControlSocketsGroupWritable with User. The
27777 directory's group would be checked against the current group, not
27778 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
27779 bugfix on 0.2.2.26-beta.
27780 - Make connection_printf_to_buf()'s behavior sane. Its callers
27781 expect it to emit a CRLF iff the format string ends with CRLF;
27782 it actually emitted a CRLF iff (a) the format string ended with
27783 CRLF or (b) the resulting string was over 1023 characters long or
27784 (c) the format string did not end with CRLF *and* the resulting
27785 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
27786 fixes part of bug 3407.
27787 - Make send_control_event_impl()'s behavior sane. Its callers
27788 expect it to always emit a CRLF at the end of the string; it
27789 might have emitted extra control characters as well. Bugfix on
27790 0.1.1.9-alpha; fixes another part of bug 3407.
27791 - Make crypto_rand_int() check the value of its input correctly.
27792 Previously, it accepted values up to UINT_MAX, but could return a
27793 negative number if given a value above INT_MAX+1. Found by George
27794 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
27795 - Avoid a segfault when reading a malformed circuit build state
27796 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
27798 - When asked about a DNS record type we don't support via a
27799 client DNSPort, reply with NOTIMPL rather than an empty
27800 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
27801 - Fix a rare memory leak during stats writing. Found by coverity.
27804 - Update to the June 1 2011 Maxmind GeoLite Country database.
27806 o Code simplifications and refactoring:
27807 - Remove some dead code as indicated by coverity.
27808 - Remove a few dead assignments during router parsing. Found by
27810 - Add some forgotten return value checks during unit tests. Found
27812 - Don't use 1-bit wide signed bit fields. Found by coverity.
27815 Changes in version 0.2.2.28-beta - 2011-06-04
27816 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
27817 fixed a big bug in whether relays stay in the consensus consistently,
27818 we moved closer to handling bridges and hidden services correctly,
27819 and we started the process of better handling the dreaded "my Vidalia
27820 died, and now my Tor demands a password when I try to reconnect to it"
27824 - Don't decide to make a new descriptor when receiving a HUP signal.
27825 This bug has caused a lot of 0.2.2.x relays to disappear from the
27826 consensus periodically. Fixes the most common case of triggering
27827 bug 1810; bugfix on 0.2.2.7-alpha.
27828 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
27829 - Don't try to build descriptors if "ORPort auto" is set and we
27830 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
27832 - Resolve a crash that occurred when setting BridgeRelay to 1 with
27833 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
27834 - Apply circuit timeouts to opened hidden-service-related circuits
27835 based on the correct start time. Previously, we would apply the
27836 circuit build timeout based on time since the circuit's creation;
27837 it was supposed to be applied based on time since the circuit
27838 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
27839 - Use the same circuit timeout for client-side introduction
27840 circuits as for other four-hop circuits, rather than the timeout
27841 for single-hop directory-fetch circuits; the shorter timeout may
27842 have been appropriate with the static circuit build timeout in
27843 0.2.1.x and earlier, but caused many hidden service access attempts
27844 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
27845 on 0.2.2.2-alpha; fixes another part of bug 1297.
27846 - In ticket 2511 we fixed a case where you could use an unconfigured
27847 bridge if you had configured it as a bridge the last time you ran
27848 Tor. Now fix another edge case: if you had configured it as a bridge
27849 but then switched to a different bridge via the controller, you
27850 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
27854 - Add an __OwningControllerProcess configuration option and a
27855 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
27856 that when it exits, Tor will shut down. Implements feature 3049.
27857 - If "UseBridges 1" is set and no bridges are configured, Tor will
27858 now refuse to build any circuits until some bridges are set.
27859 If "UseBridges auto" is set, Tor will use bridges if they are
27860 configured and we are not running as a server, but otherwise will
27861 make circuits as usual. The new default is "auto". Patch by anonym,
27862 so the Tails LiveCD can stop automatically revealing you as a Tor
27866 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
27867 - Remove a trailing asterisk from "exit-policy/default" in the
27868 output of the control port command "GETINFO info/names". Bugfix
27870 - Use a wide type to hold sockets when built for 64-bit Windows builds.
27872 - Warn when the user configures two HiddenServiceDir lines that point
27873 to the same directory. Bugfix on 0.0.6 (the version introducing
27874 HiddenServiceDir); fixes bug 3289.
27875 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
27876 part of bug 2748; bugfix on 0.2.0.10-alpha.
27877 - Log malformed requests for rendezvous descriptors as protocol
27878 warnings, not warnings. Also, use a more informative log message
27879 in case someone sees it at log level warning without prior
27880 info-level messages. Fixes the other part of bug 2748; bugfix
27882 - Clear the table recording the time of the last request for each
27883 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
27884 Previously, we would clear our HS descriptor cache on SIGNAL
27885 NEWNYM, but if we had previously retrieved a descriptor (or tried
27886 to) from every directory responsible for it, we would refuse to
27887 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
27889 - Fix a log message that said "bits" while displaying a value in
27890 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
27892 - When checking for 1024-bit keys, check for 1024 bits, not 128
27893 bytes. This allows Tor to correctly discard keys of length 1017
27894 through 1023. Bugfix on 0.0.9pre5.
27897 - Relays now log the reason for publishing a new relay descriptor,
27898 so we have a better chance of hunting down instances of bug 1810.
27899 Resolves ticket 3252.
27900 - Revise most log messages that refer to nodes by nickname to
27901 instead use the "$key=nickname at address" format. This should be
27902 more useful, especially since nicknames are less and less likely
27903 to be unique. Resolves ticket 3045.
27904 - Log (at info level) when purging pieces of hidden-service-client
27905 state because of SIGNAL NEWNYM.
27908 - Remove undocumented option "-F" from tor-resolve: it hasn't done
27909 anything since 0.2.1.16-rc.
27912 Changes in version 0.2.2.27-beta - 2011-05-18
27913 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
27914 release, and also adds a few more general bugfixes.
27917 - Fix a crash bug when changing bridges in a running Tor process.
27918 Fixes bug 3213; bugfix on 0.2.2.26-beta.
27919 - When the controller configures a new bridge, don't wait 10 to 60
27920 seconds before trying to fetch its descriptor. Bugfix on
27921 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
27924 - Require that onion keys have exponent 65537 in microdescriptors too.
27925 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
27926 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
27927 Changed the limit to 512 characters by removing base64 newlines.
27928 Fixes bug 2752. Fix by Michael Yakubovich.
27929 - When a client starts or stops using bridges, never use a circuit
27930 that was built before the configuration change. This behavior could
27931 put at risk a user who uses bridges to ensure that her traffic
27932 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
27936 Changes in version 0.2.2.26-beta - 2011-05-17
27937 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
27938 also introduces a new "socksport auto" approach that should make it
27939 easier to run multiple Tors on the same system, and does a lot of
27940 cleanup to get us closer to a release candidate.
27942 o Security/privacy fixes:
27943 - Replace all potentially sensitive memory comparison operations
27944 with versions whose runtime does not depend on the data being
27945 compared. This will help resist a class of attacks where an
27946 adversary can use variations in timing information to learn
27947 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27948 implementation by Robert Ransom based partially on code by DJB.)
27949 - When receiving a hidden service descriptor, check that it is for
27950 the hidden service we wanted. Previously, Tor would store any
27951 hidden service descriptors that a directory gave it, whether it
27952 wanted them or not. This wouldn't have let an attacker impersonate
27953 a hidden service, but it did let directories pre-seed a client
27954 with descriptors that it didn't want. Bugfix on 0.0.6.
27955 - On SIGHUP, do not clear out all TrackHostExits mappings, client
27956 DNS cache entries, and virtual address mappings: that's what
27957 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
27960 - The options SocksPort, ControlPort, and so on now all accept a
27961 value "auto" that opens a socket on an OS-selected port. A
27962 new ControlPortWriteToFile option tells Tor to write its
27963 actual control port or ports to a chosen file. If the option
27964 ControlPortFileGroupReadable is set, the file is created as
27965 group-readable. Now users can run two Tor clients on the same
27966 system without needing to manually mess with parameters. Resolves
27967 part of ticket 3076.
27968 - Set SO_REUSEADDR on all sockets, not just listeners. This should
27969 help busy exit nodes avoid running out of useable ports just
27970 because all the ports have been used in the near past. Resolves
27974 - New "GETINFO net/listeners/(type)" controller command to return
27975 a list of addresses and ports that are bound for listeners for a
27976 given connection type. This is useful when the user has configured
27977 "SocksPort auto" and the controller needs to know which port got
27978 chosen. Resolves another part of ticket 3076.
27979 - Add a new ControlSocketsGroupWritable configuration option: when
27980 it is turned on, ControlSockets are group-writeable by the default
27981 group of the current user. Patch by Jérémy Bobbio; implements
27983 - Tor now refuses to create a ControlSocket in a directory that is
27984 world-readable (or group-readable if ControlSocketsGroupWritable
27985 is 0). This is necessary because some operating systems do not
27986 enforce permissions on an AF_UNIX sockets. Permissions on the
27987 directory holding the socket, however, seems to work everywhere.
27988 - Rate-limit a warning about failures to download v2 networkstatus
27989 documents. Resolves part of bug 1352.
27990 - Backport code from 0.2.3.x that allows directory authorities to
27991 clean their microdescriptor caches. Needed to resolve bug 2230.
27992 - When an HTTPS proxy reports "403 Forbidden", we now explain
27993 what it means rather than calling it an unexpected status code.
27994 Closes bug 2503. Patch from Michael Yakubovich.
27995 - Update to the May 1 2011 Maxmind GeoLite Country database.
27998 - Authorities now clean their microdesc cache periodically and when
27999 reading from disk initially, not only when adding new descriptors.
28000 This prevents a bug where we could lose microdescriptors. Bugfix
28001 on 0.2.2.6-alpha. Fixes bug 2230.
28002 - Do not crash when our configuration file becomes unreadable, for
28003 example due to a permissions change, between when we start up
28004 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
28006 - Avoid a bug that would keep us from replacing a microdescriptor
28007 cache on Windows. (We would try to replace the file while still
28008 holding it open. That's fine on Unix, but Windows doesn't let us
28009 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
28010 - Add missing explanations for the authority-related torrc options
28011 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
28012 man page. Resolves issue 2379.
28013 - As an authority, do not upload our own vote or signature set to
28014 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
28015 it would get flagged as a duplicate. Resolves bug 3026.
28016 - Accept hidden service descriptors if we think we might be a hidden
28017 service directory, regardless of what our consensus says. This
28018 helps robustness, since clients and hidden services can sometimes
28019 have a more up-to-date view of the network consensus than we do,
28020 and if they think that the directory authorities list us a HSDir,
28021 we might actually be one. Related to bug 2732; bugfix on
28023 - When a controller changes TrackHostExits, remove mappings for
28024 hosts that should no longer have their exits tracked. Bugfix on
28026 - When a controller changes VirtualAddrNetwork, remove any mappings
28027 for hosts that were automapped to the old network. Bugfix on
28029 - When a controller changes one of the AutomapHosts* options, remove
28030 any mappings for hosts that should no longer be automapped. Bugfix
28032 - Do not reset the bridge descriptor download status every time we
28033 re-parse our configuration or get a configuration change. Fixes
28034 bug 3019; bugfix on 0.2.0.3-alpha.
28036 o Minor bugfixes (code cleanup):
28037 - When loading the microdesc journal, remember its current size.
28038 In 0.2.2, this helps prevent the microdesc journal from growing
28039 without limit on authorities (who are the only ones to use it in
28040 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28041 Fix posted by "cypherpunks."
28042 - The microdesc journal is supposed to get rebuilt only if it is
28043 at least _half_ the length of the store, not _twice_ the length
28044 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28045 - Fix a potential null-pointer dereference while computing a
28046 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
28048 - Avoid a possible null-pointer dereference when rebuilding the mdesc
28049 cache without actually having any descriptors to cache. Bugfix on
28050 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
28051 - If we fail to compute the identity digest of a v3 legacy keypair,
28052 warn, and don't use a buffer-full of junk instead. Bugfix on
28053 0.2.1.1-alpha; fixes bug 3106.
28054 - Resolve an untriggerable issue in smartlist_string_num_isin(),
28055 where if the function had ever in the future been used to check
28056 for the presence of a too-large number, it would have given an
28057 incorrect result. (Fortunately, we only used it for 16-bit
28058 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
28059 - Require that introduction point keys and onion handshake keys
28060 have a public exponent of 65537. Starts to fix bug 3207; bugfix
28063 o Removed features:
28064 - Caches no longer download and serve v2 networkstatus documents
28065 unless FetchV2Networkstatus flag is set: these documents haven't
28066 haven't been used by clients or relays since 0.2.0.x. Resolves
28070 Changes in version 0.2.3.1-alpha - 2011-05-05
28071 Tor 0.2.3.1-alpha adds some new experimental features, including support
28072 for an improved network IO backend, IOCP networking on Windows,
28073 microdescriptor caching, "fast-start" support for streams, and automatic
28074 home router configuration. There are also numerous internal improvements
28075 to try to make the code easier for developers to work with.
28077 This is the first alpha release in a new series, so expect there to be
28078 bugs. Users who would rather test out a more stable branch should
28079 stay with 0.2.2.x for now.
28082 - Tor can now optionally build with the "bufferevents" buffered IO
28083 backend provided by Libevent 2. To use this feature, make sure you
28084 have the latest possible version of Libevent, and pass the
28085 --enable-bufferevents flag to configure when building Tor from
28086 source. This feature will make our networking code more flexible,
28087 let us stack layers on each other, and let us use more efficient
28088 zero-copy transports where available.
28089 - As an experimental feature, Tor can use IOCP for networking on Windows.
28090 Once this code is tuned and optimized, it promises much better
28091 performance than the select-based backend we've used in the past. To
28092 try this feature, you must build Tor with Libevent 2, configure Tor
28093 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
28094 your torrc. There are known bugs here: only try this if you can help
28095 debug it as it breaks.
28096 - The EntryNodes option can now include country codes like {de} or IP
28097 addresses or network masks. Previously we had disallowed these options
28098 because we didn't have an efficient way to keep the list up to
28099 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
28100 - Exit nodes now accept and queue data on not-yet-connected streams.
28101 Previously, the client wasn't allowed to send data until the stream was
28102 connected, which slowed down all connections. This change will enable
28103 clients to perform a "fast-start" on streams and send data without
28104 having to wait for a confirmation that the stream has opened. (Patch
28105 from Ian Goldberg; implements the server side of Proposal 174.)
28106 - Tor now has initial support for automatic port mapping on the many
28107 home routers that support NAT-PMP or UPnP. (Not yet supported on
28108 Windows). To build the support code, you'll need to have libnatpnp
28109 library and/or the libminiupnpc library, and you'll need to enable the
28110 feature specifically by passing "--enable-upnp" and/or
28111 "--enable-natpnp" to configure. To turn it on, use the new
28112 PortForwarding option.
28113 - Caches now download, cache, and serve multiple "flavors" of the
28114 consensus, including a flavor that describes microdescriptors.
28115 - Caches now download, cache, and serve microdescriptors -- small
28116 summaries of router descriptors that are authenticated by all of the
28117 directory authorities. Once enough caches are running this code,
28118 clients will be able to save significant amounts of directory bandwidth
28119 by downloading microdescriptors instead of router descriptors.
28122 - Make logging resolution configurable with a new LogTimeGranularity
28123 option, and change the default from 1 millisecond to 1 second.
28124 Implements enhancement 1668.
28125 - We log which torrc file we're using on startup. Implements ticket
28127 - Ordinarily, Tor does not count traffic from private addresses (like
28128 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
28129 There is now a new option, CountPrivateBandwidth, to disable this
28130 behavior. Patch from Daniel Cagara.
28131 - New --enable-static-tor configure option for building Tor as
28132 statically as possible. Idea, general hackery and thoughts from
28133 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
28135 - If you set the NumCPUs option to 0, Tor will now try to detect how
28136 many CPUs you have. This is the new default behavior.
28137 - Turn on directory request statistics by default and include them in
28138 extra-info descriptors. Don't break if we have no GeoIP database.
28139 - Relays that set "ConnDirectionStatistics 1" write statistics on the
28140 bidirectional use of connections to disk every 24 hours.
28141 - Add a GeoIP file digest to the extra-info descriptor. Implements
28143 - The NodeFamily option -- which let you declare that you want to
28144 consider nodes to be part of a family whether they list themselves
28145 that way or not -- now allows IP address ranges and country codes.
28146 - Add a new 'Heartbeat' log message type to periodically log a message
28147 describing Tor's status at level Notice. This feature is meant for
28148 operators who log at notice, and want to make sure that their Tor
28149 server is still working. Implementation by George Kadianakis.
28151 o Minor bugfixes (on 0.2.2.25-alpha):
28152 - When loading the microdesc journal, remember its current size.
28153 In 0.2.2, this helps prevent the microdesc journal from growing
28154 without limit on authorities (who are the only ones to use it in
28155 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
28156 Fix posted by "cypherpunks."
28157 - The microdesc journal is supposed to get rebuilt only if it is
28158 at least _half_ the length of the store, not _twice_ the length
28159 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
28160 - If as an authority we fail to compute the identity digest of a v3
28161 legacy keypair, warn, and don't use a buffer-full of junk instead.
28162 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
28163 - Authorities now clean their microdesc cache periodically and when
28164 reading from disk initially, not only when adding new descriptors.
28165 This prevents a bug where we could lose microdescriptors. Bugfix
28168 o Minor features (controller):
28169 - Add a new SIGNAL event to the controller interface so that
28170 controllers can be notified when Tor handles a signal. Resolves
28171 issue 1955. Patch by John Brooks.
28172 - Add a new GETINFO option to get total bytes read and written. Patch
28173 from pipe, revised by atagar. Resolves ticket 2345.
28174 - Implement some GETINFO controller fields to provide information about
28175 the Tor process's pid, euid, username, and resource limits.
28178 - Our build system requires automake 1.6 or later to create the
28179 Makefile.in files. Previously, you could have used 1.4.
28180 This only affects developers and people building Tor from git;
28181 people who build Tor from the source distribution without changing
28182 the Makefile.am files should be fine.
28183 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
28184 so on. This is more robust against some of the failure modes
28185 associated with running the autotools pieces on their own.
28187 o Minor packaging issues:
28188 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
28189 already created. Patch from Andreas Stieger. Fixes bug 2573.
28191 o Code simplifications and refactoring:
28192 - A major revision to our internal node-selecting and listing logic.
28193 Tor already had at least two major ways to look at the question of
28194 "which Tor servers do we know about": a list of router descriptors,
28195 and a list of entries in the current consensus. With
28196 microdescriptors, we're adding a third. Having so many systems
28197 without an abstraction layer over them was hurting the codebase.
28198 Now, we have a new "node_t" abstraction that presents a consistent
28199 interface to a client's view of a Tor node, and holds (nearly) all
28200 of the mutable state formerly in routerinfo_t and routerstatus_t.
28201 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
28202 no longer link against Libevent: they never used it, but
28203 our library structure used to force them to link it.
28205 o Removed features:
28206 - Remove some old code to work around even older versions of Tor that
28207 used forked processes to handle DNS requests. Such versions of Tor
28208 are no longer in use as servers.
28210 o Documentation fixes:
28211 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
28212 - Add missing documentation for the authority-related torrc options
28213 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
28217 Changes in version 0.2.2.25-alpha - 2011-04-29
28218 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
28219 robust, routers no longer overreport their bandwidth, Win7 should crash
28220 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
28221 now prevents hidden service-related activity from being linkable. It
28222 provides more information to Vidalia so you can see if your bridge is
28223 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
28224 StrictNodes configuration options to make them more reliable, more
28225 understandable, and more regularly applied. If you use those options,
28226 please see the revised documentation for them in the manual page.
28229 - Relays were publishing grossly inflated bandwidth values because
28230 they were writing their state files wrong--now they write the
28231 correct value. Also, resume reading bandwidth history from the
28232 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
28233 - Improve hidden service robustness: When we find that we have
28234 extended a hidden service's introduction circuit to a relay not
28235 listed as an introduction point in the HS descriptor we currently
28236 have, retry with an introduction point from the current
28237 descriptor. Previously we would just give up. Fixes bugs 1024 and
28238 1930; bugfix on 0.2.0.10-alpha.
28239 - Clients now stop trying to use an exit node associated with a given
28240 destination by TrackHostExits if they fail to reach that exit node.
28241 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
28242 - Fix crash bug on platforms where gmtime and localtime can return
28243 NULL. Windows 7 users were running into this one. Fixes part of bug
28244 2077. Bugfix on all versions of Tor. Found by boboper.
28246 o Security and stability fixes:
28247 - Don't double-free a parsable, but invalid, microdescriptor, even if
28248 it is followed in the blob we're parsing by an unparsable
28249 microdescriptor. Fixes an issue reported in a comment on bug 2954.
28250 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
28251 - If the Nickname configuration option isn't given, Tor would pick a
28252 nickname based on the local hostname as the nickname for a relay.
28253 Because nicknames are not very important in today's Tor and the
28254 "Unnamed" nickname has been implemented, this is now problematic
28255 behavior: It leaks information about the hostname without being
28256 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
28257 introduced the Unnamed nickname. Reported by tagnaq.
28258 - Fix an uncommon assertion failure when running with DNSPort under
28259 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
28260 - Avoid linkability based on cached hidden service descriptors: forget
28261 all hidden service descriptors cached as a client when processing a
28262 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
28265 - Export GeoIP information on bridge usage to controllers even if we
28266 have not yet been running for 24 hours. Now Vidalia bridge operators
28267 can get more accurate and immediate feedback about their
28268 contributions to the network.
28270 o Major features and bugfixes (node selection):
28271 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
28272 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
28273 options. Previously, we had been ambiguous in describing what
28274 counted as an "exit" node, and what operations exactly "StrictNodes
28275 0" would permit. This created confusion when people saw nodes built
28276 through unexpected circuits, and made it hard to tell real bugs from
28277 surprises. Now the intended behavior is:
28278 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
28279 a node that delivers user traffic outside the Tor network.
28280 . "Entry", in the context of EntryNodes, means a node used as the
28281 first hop of a multihop circuit. It doesn't include direct
28282 connections to directory servers.
28283 . "ExcludeNodes" applies to all nodes.
28284 . "StrictNodes" changes the behavior of ExcludeNodes only. When
28285 StrictNodes is set, Tor should avoid all nodes listed in
28286 ExcludeNodes, even when it will make user requests fail. When
28287 StrictNodes is *not* set, then Tor should follow ExcludeNodes
28288 whenever it can, except when it must use an excluded node to
28289 perform self-tests, connect to a hidden service, provide a
28290 hidden service, fulfill a .exit request, upload directory
28291 information, or fetch directory information.
28292 Collectively, the changes to implement the behavior fix bug 1090.
28293 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
28294 a node is listed in both, it's treated as excluded.
28295 - ExcludeNodes now applies to directory nodes -- as a preference if
28296 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
28297 Don't exclude all the directory authorities and set StrictNodes to 1
28298 unless you really want your Tor to break.
28299 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
28300 - ExcludeExitNodes now overrides .exit requests.
28301 - We don't use bridges listed in ExcludeNodes.
28302 - When StrictNodes is 1:
28303 . We now apply ExcludeNodes to hidden service introduction points
28304 and to rendezvous points selected by hidden service users. This
28305 can make your hidden service less reliable: use it with caution!
28306 . If we have used ExcludeNodes on ourself, do not try relay
28307 reachability self-tests.
28308 . If we have excluded all the directory authorities, we will not
28309 even try to upload our descriptor if we're a relay.
28310 . Do not honor .exit requests to an excluded node.
28311 - Remove a misfeature that caused us to ignore the Fast/Stable flags
28312 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
28313 - When the set of permitted nodes changes, we now remove any mappings
28314 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
28316 - We never cannibalize a circuit that had excluded nodes on it, even
28317 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
28318 - Revert a change where we would be laxer about attaching streams to
28319 circuits than when building the circuits. This was meant to prevent
28320 a set of bugs where streams were never attachable, but our improved
28321 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
28322 - Keep track of how many times we launch a new circuit to handle a
28323 given stream. Too many launches could indicate an inconsistency
28324 between our "launch a circuit to handle this stream" logic and our
28325 "attach this stream to one of the available circuits" logic.
28326 - Improve log messages related to excluded nodes.
28329 - Fix a spurious warning when moving from a short month to a long
28330 month on relays with month-based BandwidthAccounting. Bugfix on
28331 0.2.2.17-alpha; fixes bug 3020.
28332 - When a client finds that an origin circuit has run out of 16-bit
28333 stream IDs, we now mark it as unusable for new streams. Previously,
28334 we would try to close the entire circuit. Bugfix on 0.0.6.
28335 - Add a forgotten cast that caused a compile warning on OS X 10.6.
28336 Bugfix on 0.2.2.24-alpha.
28337 - Be more careful about reporting the correct error from a failed
28338 connect() system call. Under some circumstances, it was possible to
28339 look at an incorrect value for errno when sending the end reason.
28340 Bugfix on 0.1.0.1-rc.
28341 - Correctly handle an "impossible" overflow cases in connection byte
28342 counting, where we write or read more than 4GB on an edge connection
28343 in a single second. Bugfix on 0.1.2.8-beta.
28344 - Correct the warning displayed when a rendezvous descriptor exceeds
28345 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
28347 - Clients and hidden services now use HSDir-flagged relays for hidden
28348 service descriptor downloads and uploads even if the relays have no
28349 DirPort set and the client has disabled TunnelDirConns. This will
28350 eventually allow us to give the HSDir flag to relays with no
28351 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
28352 - Downgrade "no current certificates known for authority" message from
28353 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
28354 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
28355 2917. Bugfix on 0.1.1.1-alpha.
28356 - Only limit the lengths of single HS descriptors, even when multiple
28357 HS descriptors are published to an HSDir relay in a single POST
28358 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
28359 - Write the current time into the LastWritten line in our state file,
28360 rather than the time from the previous write attempt. Also, stop
28361 trying to use a time of -1 in our log statements. Fixes bug 3039;
28362 bugfix on 0.2.2.14-alpha.
28363 - Be more consistent in our treatment of file system paths. "~" should
28364 get expanded to the user's home directory in the Log config option.
28365 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
28366 feature for the -f and --DataDirectory options.
28369 - Make sure every relay writes a state file at least every 12 hours.
28370 Previously, a relay could go for weeks without writing its state
28371 file, and on a crash could lose its bandwidth history, capacity
28372 estimates, client country statistics, and so on. Addresses bug 3012.
28373 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
28374 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
28375 clients are already deprecated because of security bugs.
28376 - Don't allow v0 hidden service authorities to act as clients.
28377 Required by fix for bug 3000.
28378 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
28379 by fix for bug 3000.
28380 - Ensure that no empty [dirreq-](read|write)-history lines are added
28381 to an extrainfo document. Implements ticket 2497.
28383 o Code simplification and refactoring:
28384 - Remove workaround code to handle directory responses from servers
28385 that had bug 539 (they would send HTTP status 503 responses _and_
28386 send a body too). Since only server versions before
28387 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
28388 keep the workaround in place.
28389 - Remove the old 'fuzzy time' logic. It was supposed to be used for
28390 handling calculations where we have a known amount of clock skew and
28391 an allowed amount of unknown skew. But we only used it in three
28392 places, and we never adjusted the known/unknown skew values. This is
28393 still something we might want to do someday, but if we do, we'll
28394 want to do it differently.
28395 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
28396 None of the cases where we did this before were wrong, but by making
28397 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
28398 - Use GetTempDir to find the proper temporary directory location on
28399 Windows when generating temporary files for the unit tests. Patch by
28403 Changes in version 0.2.2.24-alpha - 2011-04-08
28404 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
28405 prevented Tor clients from effectively using "multihomed" bridges,
28406 that is, bridges that listen on multiple ports or IP addresses so users
28407 can continue to use some of their addresses even if others get blocked.
28410 - Fix a bug where bridge users who configure the non-canonical
28411 address of a bridge automatically switch to its canonical
28412 address. If a bridge listens at more than one address, it should be
28413 able to advertise those addresses independently and any non-blocked
28414 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
28416 - If you configured Tor to use bridge A, and then quit and
28417 configured Tor to use bridge B instead, it would happily continue
28418 to use bridge A if it's still reachable. While this behavior is
28419 a feature if your goal is connectivity, in some scenarios it's a
28420 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
28421 - Directory authorities now use data collected from their own
28422 uptime observations when choosing whether to assign the HSDir flag
28423 to relays, instead of trusting the uptime value the relay reports in
28424 its descriptor. This change helps prevent an attack where a small
28425 set of nodes with frequently-changing identity keys can blackhole
28426 a hidden service. (Only authorities need upgrade; others will be
28427 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
28430 - When we restart our relay, we might get a successful connection
28431 from the outside before we've started our reachability tests,
28432 triggering a warning: "ORPort found reachable, but I have no
28433 routerinfo yet. Failing to inform controller of success." This
28434 bug was harmless unless Tor is running under a controller
28435 like Vidalia, in which case the controller would never get a
28436 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
28438 - Make directory authorities more accurate at recording when
28439 relays that have failed several reachability tests became
28440 unreachable, so we can provide more accuracy at assigning Stable,
28441 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
28442 - Fix an issue that prevented static linking of libevent on
28443 some platforms (notably Linux). Fixes bug 2698; bugfix on
28444 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
28445 the --with-static-libevent configure option).
28446 - We now ask the other side of a stream (the client or the exit)
28447 for more data on that stream when the amount of queued data on
28448 that stream dips low enough. Previously, we wouldn't ask the
28449 other side for more data until either it sent us more data (which
28450 it wasn't supposed to do if it had exhausted its window!) or we
28451 had completely flushed all our queued data. This flow control fix
28452 should improve throughput. Fixes bug 2756; bugfix on the earliest
28453 released versions of Tor (svn commit r152).
28454 - Avoid a double-mark-for-free warning when failing to attach a
28455 transparent proxy connection. (We thought we had fixed this in
28456 0.2.2.23-alpha, but it turns out our fix was checking the wrong
28457 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
28458 bug) and 0.2.2.23-alpha (the incorrect fix).
28459 - When warning about missing zlib development packages during compile,
28460 give the correct package names. Bugfix on 0.2.0.1-alpha.
28463 - Directory authorities now log the source of a rejected POSTed v3
28464 networkstatus vote.
28465 - Make compilation with clang possible when using
28466 --enable-gcc-warnings by removing two warning options that clang
28467 hasn't implemented yet and by fixing a few warnings. Implements
28469 - When expiring circuits, use microsecond timers rather than
28470 one-second timers. This can avoid an unpleasant situation where a
28471 circuit is launched near the end of one second and expired right
28472 near the beginning of the next, and prevent fluctuations in circuit
28474 - Use computed circuit-build timeouts to decide when to launch
28475 parallel introduction circuits for hidden services. (Previously,
28476 we would retry after 15 seconds.)
28477 - Update to the April 1 2011 Maxmind GeoLite Country database.
28480 - Create the /var/run/tor directory on startup on OpenSUSE if it is
28481 not already created. Patch from Andreas Stieger. Fixes bug 2573.
28483 o Documentation changes:
28484 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
28485 - Resolve all doxygen warnings except those for missing documentation.
28487 - Add doxygen documentation for more functions, fields, and types.
28490 Changes in version 0.2.2.23-alpha - 2011-03-08
28491 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
28492 they restart they don't lose their bandwidth capacity estimate. This
28493 release also fixes a diverse set of user-facing bugs, ranging from
28494 relays overrunning their rate limiting to clients falsely warning about
28495 clock skew to bridge descriptor leaks by our bridge directory authority.
28498 - Stop sending a CLOCK_SKEW controller status event whenever
28499 we fetch directory information from a relay that has a wrong clock.
28500 Instead, only inform the controller when it's a trusted authority
28501 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28502 the rest of bug 1074.
28503 - Fix an assert in parsing router descriptors containing IPv6
28504 addresses. This one took down the directory authorities when
28505 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
28506 - Make the bridge directory authority refuse to answer directory
28507 requests for "all" descriptors. It used to include bridge
28508 descriptors in its answer, which was a major information leak.
28509 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
28510 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28511 Tor would ignore their RelayBandwidthBurst setting,
28512 potentially using more bandwidth than expected. Bugfix on
28513 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28514 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28515 hidserv" in her torrc. The 'hidserv' argument never controlled
28516 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28519 - Relays now save observed peak bandwidth throughput rates to their
28520 state file (along with total usage, which was already saved)
28521 so that they can determine their correct estimated bandwidth on
28522 restart. Resolves bug 1863, where Tor relays would reset their
28523 estimated bandwidth to 0 after restarting.
28524 - Directory authorities now take changes in router IP address and
28525 ORPort into account when determining router stability. Previously,
28526 if a router changed its IP or ORPort, the authorities would not
28527 treat it as having any downtime for the purposes of stability
28528 calculation, whereas clients would experience downtime since the
28529 change could take a while to propagate to them. Resolves issue 1035.
28530 - Enable Address Space Layout Randomization (ASLR) and Data Execution
28531 Prevention (DEP) by default on Windows to make it harder for
28532 attackers to exploit vulnerabilities. Patch from John Brooks.
28534 o Minor bugfixes (on 0.2.1.x and earlier):
28535 - Fix a rare crash bug that could occur when a client was configured
28536 with a large number of bridges. Fixes bug 2629; bugfix on
28537 0.2.1.2-alpha. Bugfix by trac user "shitlei".
28538 - Avoid a double mark-for-free warning when failing to attach a
28539 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
28541 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
28542 found by "cypherpunks". This bug was introduced before the first
28543 Tor release, in svn commit r110.
28544 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
28545 don't mention them in the manpage. Fixes bug 2450; issue
28546 spotted by keb and G-Lo.
28547 - Fix a bug in bandwidth history state parsing that could have been
28548 triggered if a future version of Tor ever changed the timing
28549 granularity at which bandwidth history is measured. Bugfix on
28550 Tor 0.1.1.11-alpha.
28551 - When a relay decides that its DNS is too broken for it to serve
28552 as an exit server, it advertised itself as a non-exit, but
28553 continued to act as an exit. This could create accidental
28554 partitioning opportunities for users. Instead, if a relay is
28555 going to advertise reject *:* as its exit policy, it should
28556 really act with exit policy "reject *:*". Fixes bug 2366.
28557 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
28558 - In the special case where you configure a public exit relay as your
28559 bridge, Tor would be willing to use that exit relay as the last
28560 hop in your circuit as well. Now we fail that circuit instead.
28561 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
28562 - Fix a bug with our locking implementation on Windows that couldn't
28563 correctly detect when a file was already locked. Fixes bug 2504,
28564 bugfix on 0.2.1.6-alpha.
28565 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
28566 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
28568 - Set target port in get_interface_address6() correctly. Bugfix
28569 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
28570 - Directory authorities are now more robust to hops back in time
28571 when calculating router stability. Previously, if a run of uptime
28572 or downtime appeared to be negative, the calculation could give
28573 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
28575 - Fix an assert that got triggered when using the TestingTorNetwork
28576 configuration option and then issuing a GETINFO config-text control
28577 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
28579 o Minor bugfixes (on 0.2.2.x):
28580 - Clients should not weight BadExit nodes as Exits in their node
28581 selection. Similarly, directory authorities should not count BadExit
28582 bandwidth as Exit bandwidth when computing bandwidth-weights.
28583 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
28584 - Correctly clear our dir_read/dir_write history when there is an
28585 error parsing any bw history value from the state file. Bugfix on
28586 Tor 0.2.2.15-alpha.
28587 - Resolve a bug in verifying signatures of directory objects
28588 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
28589 Fixes bug 2409. Found by "piebeer".
28590 - Bridge authorities no longer crash on SIGHUP when they try to
28591 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
28595 - Log less aggressively about circuit timeout changes, and improve
28596 some other circuit timeout messages. Resolves bug 2004.
28597 - Log a little more clearly about the times at which we're no longer
28598 accepting new connections. Resolves bug 2181.
28599 - Reject attempts at the client side to open connections to private
28600 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
28601 a randomly chosen exit node. Attempts to do so are always
28602 ill-defined, generally prevented by exit policies, and usually
28603 in error. This will also help to detect loops in transparent
28604 proxy configurations. You can disable this feature by setting
28605 "ClientRejectInternalAddresses 0" in your torrc.
28606 - Always treat failure to allocate an RSA key as an unrecoverable
28608 - Update to the March 1 2011 Maxmind GeoLite Country database.
28610 o Minor features (log subsystem):
28611 - Add documentation for configuring logging at different severities in
28612 different log domains. We've had this feature since 0.2.1.1-alpha,
28613 but for some reason it never made it into the manpage. Fixes
28615 - Make it simpler to specify "All log domains except for A and B".
28616 Previously you needed to say "[*,~A,~B]". Now you can just say
28618 - Add a "LogMessageDomains 1" option to include the domains of log
28619 messages along with the messages. Without this, there's no way
28620 to use log domains without reading the source or doing a lot
28623 o Packaging changes:
28624 - Stop shipping the Tor specs files and development proposal documents
28625 in the tarball. They are now in a separate git repository at
28626 git://git.torproject.org/torspec.git
28629 Changes in version 0.2.1.30 - 2011-02-23
28630 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
28631 change is a slight tweak to Tor's TLS handshake that makes relays
28632 and bridges that run this new version reachable from Iran again.
28633 We don't expect this tweak will win the arms race long-term, but it
28634 buys us time until we roll out a better solution.
28637 - Stop sending a CLOCK_SKEW controller status event whenever
28638 we fetch directory information from a relay that has a wrong clock.
28639 Instead, only inform the controller when it's a trusted authority
28640 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
28641 the rest of bug 1074.
28642 - Fix a bounds-checking error that could allow an attacker to
28643 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
28644 Found by "piebeer".
28645 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
28646 Tor would ignore their RelayBandwidthBurst setting,
28647 potentially using more bandwidth than expected. Bugfix on
28648 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
28649 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
28650 hidserv" in her torrc. The 'hidserv' argument never controlled
28651 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
28654 - Adjust our TLS Diffie-Hellman parameters to match those used by
28656 - Update to the February 1 2011 Maxmind GeoLite Country database.
28659 - Check for and reject overly long directory certificates and
28660 directory tokens before they have a chance to hit any assertions.
28661 Bugfix on 0.2.1.28. Found by "doorss".
28662 - Bring the logic that gathers routerinfos and assesses the
28663 acceptability of circuits into line. This prevents a Tor OP from
28664 getting locked in a cycle of choosing its local OR as an exit for a
28665 path (due to a .exit request) and then rejecting the circuit because
28666 its OR is not listed yet. It also prevents Tor clients from using an
28667 OR running in the same instance as an exit (due to a .exit request)
28668 if the OR does not meet the same requirements expected of an OR
28669 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
28671 o Packaging changes:
28672 - Stop shipping the Tor specs files and development proposal documents
28673 in the tarball. They are now in a separate git repository at
28674 git://git.torproject.org/torspec.git
28675 - Do not include Git version tags as though they are SVN tags when
28676 generating a tarball from inside a repository that has switched
28677 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
28680 Changes in version 0.2.2.22-alpha - 2011-01-25
28681 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
28682 main other change is a slight tweak to Tor's TLS handshake that makes
28683 relays and bridges that run this new version reachable from Iran again.
28684 We don't expect this tweak will win the arms race long-term, but it
28685 will buy us a bit more time until we roll out a better solution.
28688 - Fix a bounds-checking error that could allow an attacker to
28689 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
28690 Found by "piebeer".
28691 - Don't assert when changing from bridge to relay or vice versa
28692 via the controller. The assert happened because we didn't properly
28693 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
28694 bug 2433. Reported by bastik.
28697 - Adjust our TLS Diffie-Hellman parameters to match those used by
28699 - Provide a log message stating which geoip file we're parsing
28700 instead of just stating that we're parsing the geoip file.
28701 Implements ticket 2432.
28704 - Check for and reject overly long directory certificates and
28705 directory tokens before they have a chance to hit any assertions.
28706 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
28709 Changes in version 0.2.2.21-alpha - 2011-01-15
28710 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
28711 continues our recent code security audit work. The main fix resolves
28712 a remote heap overflow vulnerability that can allow remote code
28713 execution (CVE-2011-0427). Other fixes address a variety of assert
28714 and crash bugs, most of which we think are hard to exploit remotely.
28716 o Major bugfixes (security), also included in 0.2.1.29:
28717 - Fix a heap overflow bug where an adversary could cause heap
28718 corruption. This bug probably allows remote code execution
28719 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
28721 - Prevent a denial-of-service attack by disallowing any
28722 zlib-compressed data whose compression factor is implausibly
28723 high. Fixes part of bug 2324; reported by "doorss".
28724 - Zero out a few more keys in memory before freeing them. Fixes
28725 bug 2384 and part of bug 2385. These key instances found by
28726 "cypherpunks", based on Andrew Case's report about being able
28727 to find sensitive data in Tor's memory space if you have enough
28728 permissions. Bugfix on 0.0.2pre9.
28730 o Major bugfixes (crashes), also included in 0.2.1.29:
28731 - Prevent calls to Libevent from inside Libevent log handlers.
28732 This had potential to cause a nasty set of crashes, especially
28733 if running Libevent with debug logging enabled, and running
28734 Tor with a controller watching for low-severity log messages.
28735 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
28736 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
28737 underflow errors there too. Fixes the other part of bug 2324.
28738 - Fix a bug where we would assert if we ever had a
28739 cached-descriptors.new file (or another file read directly into
28740 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
28741 on 0.2.1.25. Found by doorss.
28742 - Fix some potential asserts and parsing issues with grossly
28743 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
28746 o Minor bugfixes (other), also included in 0.2.1.29:
28747 - Fix a bug with handling misformed replies to reverse DNS lookup
28748 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
28749 bug reported by doorss.
28750 - Fix compilation on mingw when a pthreads compatibility library
28751 has been installed. (We don't want to use it, so we shouldn't
28752 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
28753 - Fix a bug where we would declare that we had run out of virtual
28754 addresses when the address space was only half-exhausted. Bugfix
28756 - Correctly handle the case where AutomapHostsOnResolve is set but
28757 no virtual addresses are available. Fixes bug 2328; bugfix on
28758 0.1.2.1-alpha. Bug found by doorss.
28759 - Correctly handle wrapping around when we run out of virtual
28760 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
28762 o Minor features, also included in 0.2.1.29:
28763 - Update to the January 1 2011 Maxmind GeoLite Country database.
28764 - Introduce output size checks on all of our decryption functions.
28766 o Build changes, also included in 0.2.1.29:
28767 - Tor does not build packages correctly with Automake 1.6 and earlier;
28768 added a check to Makefile.am to make sure that we're building with
28769 Automake 1.7 or later.
28770 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
28771 because we built it with a too-old version of automake. Thus that
28772 release broke ./configure --enable-openbsd-malloc, which is popular
28773 among really fast exit relays on Linux.
28775 o Major bugfixes, new in 0.2.2.21-alpha:
28776 - Prevent crash/heap corruption when the cbtnummodes consensus
28777 parameter is set to 0 or large values. Fixes bug 2317; bugfix
28780 o Major features, new in 0.2.2.21-alpha:
28781 - Introduce minimum/maximum values that clients will believe
28782 from the consensus. Now we'll have a better chance to avoid crashes
28783 or worse when a consensus param has a weird value.
28785 o Minor features, new in 0.2.2.21-alpha:
28786 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
28787 used on bridges, and it makes bridge scanning somewhat easier.
28788 - If writing the state file to disk fails, wait up to an hour before
28789 retrying again, rather than trying again each second. Fixes bug
28790 2346; bugfix on Tor 0.1.1.3-alpha.
28791 - Make Libevent log messages get delivered to controllers later,
28792 and not from inside the Libevent log handler. This prevents unsafe
28793 reentrant Libevent calls while still letting the log messages
28795 - Detect platforms that brokenly use a signed size_t, and refuse to
28796 build there. Found and analyzed by doorss and rransom.
28797 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
28800 o Minor bugfixes, new in 0.2.2.21-alpha:
28801 - Handle SOCKS messages longer than 128 bytes long correctly, rather
28802 than waiting forever for them to finish. Fixes bug 2330; bugfix
28803 on 0.2.0.16-alpha. Found by doorss.
28804 - Add assertions to check for overflow in arguments to
28805 base32_encode() and base32_decode(); fix a signed-unsigned
28806 comparison there too. These bugs are not actually reachable in Tor,
28807 but it's good to prevent future errors too. Found by doorss.
28808 - Correctly detect failures to create DNS requests when using Libevent
28809 versions before v2. (Before Libevent 2, we used our own evdns
28810 implementation. Its return values for Libevent's evdns_resolve_*()
28811 functions are not consistent with those from Libevent.) Fixes bug
28812 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
28814 o Documentation, new in 0.2.2.21-alpha:
28815 - Document the default socks host and port (127.0.0.1:9050) for
28819 Changes in version 0.2.1.29 - 2011-01-15
28820 Tor 0.2.1.29 continues our recent code security audit work. The main
28821 fix resolves a remote heap overflow vulnerability that can allow remote
28822 code execution. Other fixes address a variety of assert and crash bugs,
28823 most of which we think are hard to exploit remotely.
28825 o Major bugfixes (security):
28826 - Fix a heap overflow bug where an adversary could cause heap
28827 corruption. This bug probably allows remote code execution
28828 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
28830 - Prevent a denial-of-service attack by disallowing any
28831 zlib-compressed data whose compression factor is implausibly
28832 high. Fixes part of bug 2324; reported by "doorss".
28833 - Zero out a few more keys in memory before freeing them. Fixes
28834 bug 2384 and part of bug 2385. These key instances found by
28835 "cypherpunks", based on Andrew Case's report about being able
28836 to find sensitive data in Tor's memory space if you have enough
28837 permissions. Bugfix on 0.0.2pre9.
28839 o Major bugfixes (crashes):
28840 - Prevent calls to Libevent from inside Libevent log handlers.
28841 This had potential to cause a nasty set of crashes, especially
28842 if running Libevent with debug logging enabled, and running
28843 Tor with a controller watching for low-severity log messages.
28844 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
28845 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
28846 underflow errors there too. Fixes the other part of bug 2324.
28847 - Fix a bug where we would assert if we ever had a
28848 cached-descriptors.new file (or another file read directly into
28849 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
28850 on 0.2.1.25. Found by doorss.
28851 - Fix some potential asserts and parsing issues with grossly
28852 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
28855 o Minor bugfixes (other):
28856 - Fix a bug with handling misformed replies to reverse DNS lookup
28857 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
28858 bug reported by doorss.
28859 - Fix compilation on mingw when a pthreads compatibility library
28860 has been installed. (We don't want to use it, so we shouldn't
28861 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
28862 - Fix a bug where we would declare that we had run out of virtual
28863 addresses when the address space was only half-exhausted. Bugfix
28865 - Correctly handle the case where AutomapHostsOnResolve is set but
28866 no virtual addresses are available. Fixes bug 2328; bugfix on
28867 0.1.2.1-alpha. Bug found by doorss.
28868 - Correctly handle wrapping around to when we run out of virtual
28869 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
28870 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
28871 because we built it with a too-old version of automake. Thus that
28872 release broke ./configure --enable-openbsd-malloc, which is popular
28873 among really fast exit relays on Linux.
28876 - Update to the January 1 2011 Maxmind GeoLite Country database.
28877 - Introduce output size checks on all of our decryption functions.
28880 - Tor does not build packages correctly with Automake 1.6 and earlier;
28881 added a check to Makefile.am to make sure that we're building with
28882 Automake 1.7 or later.
28885 Changes in version 0.2.2.20-alpha - 2010-12-17
28886 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
28887 exploitable bugs. We also fix a variety of other significant bugs,
28888 change the IP address for one of our directory authorities, and update
28889 the minimum version that Tor relays must run to join the network.
28892 - Fix a remotely exploitable bug that could be used to crash instances
28893 of Tor remotely by overflowing on the heap. Remote-code execution
28894 hasn't been confirmed, but can't be ruled out. Everyone should
28895 upgrade. Bugfix on the 0.1.1 series and later.
28896 - Fix a bug that could break accounting on 64-bit systems with large
28897 time_t values, making them hibernate for impossibly long intervals.
28898 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
28899 - Fix a logic error in directory_fetches_from_authorities() that
28900 would cause all _non_-exits refusing single-hop-like circuits
28901 to fetch from authorities, when we wanted to have _exits_ fetch
28902 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
28904 - Fix a stream fairness bug that would cause newer streams on a given
28905 circuit to get preference when reading bytes from the origin or
28906 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
28907 introduced before the first Tor release, in svn revision r152.
28909 o Directory authority changes:
28910 - Change IP address and ports for gabelmoo (v3 directory authority).
28913 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
28914 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
28915 - Fix an off-by-one error in calculating some controller command
28916 argument lengths. Fortunately, this mistake is harmless since
28917 the controller code does redundant NUL termination too. Found by
28918 boboper. Bugfix on 0.1.1.1-alpha.
28919 - Do not dereference NULL if a bridge fails to build its
28920 extra-info descriptor. Found by an anonymous commenter on
28921 Trac. Bugfix on 0.2.2.19-alpha.
28924 - Update to the December 1 2010 Maxmind GeoLite Country database.
28925 - Directory authorities now reject relays running any versions of
28926 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
28927 known bugs that keep RELAY_EARLY cells from working on rendezvous
28928 circuits. Followup to fix for bug 2081.
28929 - Directory authorities now reject relays running any version of Tor
28930 older than 0.2.0.26-rc. That version is the earliest that fetches
28931 current directory information correctly. Fixes bug 2156.
28932 - Report only the top 10 ports in exit-port stats in order not to
28933 exceed the maximum extra-info descriptor length of 50 KB. Implements
28937 Changes in version 0.2.1.28 - 2010-12-17
28938 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
28939 exploitable bugs. We also took this opportunity to change the IP address
28940 for one of our directory authorities, and to update the geoip database
28944 - Fix a remotely exploitable bug that could be used to crash instances
28945 of Tor remotely by overflowing on the heap. Remote-code execution
28946 hasn't been confirmed, but can't be ruled out. Everyone should
28947 upgrade. Bugfix on the 0.1.1 series and later.
28949 o Directory authority changes:
28950 - Change IP address and ports for gabelmoo (v3 directory authority).
28953 - Update to the December 1 2010 Maxmind GeoLite Country database.
28956 Changes in version 0.2.1.27 - 2010-11-23
28957 Yet another OpenSSL security patch broke its compatibility with Tor:
28958 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
28959 also took this opportunity to fix several crash bugs, integrate a new
28960 directory authority, and update the bundled GeoIP database.
28963 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
28964 No longer set the tlsext_host_name extension on server SSL objects;
28965 but continue to set it on client SSL objects. Our goal in setting
28966 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
28967 bugfix on 0.2.1.1-alpha.
28968 - Do not log messages to the controller while shrinking buffer
28969 freelists. Doing so would sometimes make the controller connection
28970 try to allocate a buffer chunk, which would mess up the internals
28971 of the freelist and cause an assertion failure. Fixes bug 1125;
28972 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28973 - Learn our external IP address when we're a relay or bridge, even if
28974 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28975 where we introduced bridge relays that don't need to publish to
28976 be useful. Fixes bug 2050.
28977 - Do even more to reject (and not just ignore) annotations on
28978 router descriptors received anywhere but from the cache. Previously
28979 we would ignore such annotations at first, but cache them to disk
28980 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28981 - When you're using bridges and your network goes away and your
28982 bridges get marked as down, recover when you attempt a new socks
28983 connection (if the network is back), rather than waiting up to an
28984 hour to try fetching new descriptors for your bridges. Bugfix on
28985 0.2.0.3-alpha; fixes bug 1981.
28988 - Move to the November 2010 Maxmind GeoLite country db (rather
28989 than the June 2009 ip-to-country GeoIP db) for our statistics that
28990 count how many users relays are seeing from each country. Now we'll
28991 have more accurate data, especially for many African countries.
28993 o New directory authorities:
28994 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
28998 - Fix an assertion failure that could occur in directory caches or
28999 bridge users when using a very short voting interval on a testing
29000 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
29002 - Enforce multiplicity rules when parsing annotations. Bugfix on
29003 0.2.0.8-alpha. Found by piebeer.
29004 - Allow handshaking OR connections to take a full KeepalivePeriod
29005 seconds to handshake. Previously, we would close them after
29006 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29007 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29009 - When building with --enable-gcc-warnings on OpenBSD, disable
29010 warnings in system headers. This makes --enable-gcc-warnings
29011 pass on OpenBSD 4.8.
29014 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29015 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29016 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29017 Servers can start sending this code when enough clients recognize
29018 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
29019 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29020 Patch from mingw-san.
29023 - Remove the old debian/ directory from the main Tor distribution.
29024 The official Tor-for-debian git repository lives at the URL
29025 https://git.torproject.org/debian/tor.git
29026 - Stop shipping the old doc/website/ directory in the tarball. We
29027 changed the website format in late 2010, and what we shipped in
29028 0.2.1.26 really wasn't that useful anyway.
29031 Changes in version 0.2.2.19-alpha - 2010-11-22
29032 Yet another OpenSSL security patch broke its compatibility with Tor:
29033 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
29036 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
29037 No longer set the tlsext_host_name extension on server SSL objects;
29038 but continue to set it on client SSL objects. Our goal in setting
29039 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
29040 bugfix on 0.2.1.1-alpha.
29043 - Try harder not to exceed the maximum length of 50 KB when writing
29044 statistics to extra-info descriptors. This bug was triggered by very
29045 fast relays reporting exit-port, entry, and dirreq statistics.
29046 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
29047 - Publish a router descriptor even if generating an extra-info
29048 descriptor fails. Previously we would not publish a router
29049 descriptor without an extra-info descriptor; this can cause fast
29050 exit relays collecting exit-port statistics to drop from the
29051 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
29054 Changes in version 0.2.2.18-alpha - 2010-11-16
29055 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
29056 us lately, makes unpublished bridge relays able to detect their IP
29057 address, and fixes a wide variety of other bugs to get us much closer
29058 to a stable release.
29061 - Do even more to reject (and not just ignore) annotations on
29062 router descriptors received anywhere but from the cache. Previously
29063 we would ignore such annotations at first, but cache them to disk
29064 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
29065 - Do not log messages to the controller while shrinking buffer
29066 freelists. Doing so would sometimes make the controller connection
29067 try to allocate a buffer chunk, which would mess up the internals
29068 of the freelist and cause an assertion failure. Fixes bug 1125;
29069 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
29070 - Learn our external IP address when we're a relay or bridge, even if
29071 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
29072 where we introduced bridge relays that don't need to publish to
29073 be useful. Fixes bug 2050.
29074 - Maintain separate TLS contexts and certificates for incoming and
29075 outgoing connections in bridge relays. Previously we would use the
29076 same TLS contexts and certs for incoming and outgoing connections.
29077 Bugfix on 0.2.0.3-alpha; addresses bug 988.
29078 - Maintain separate identity keys for incoming and outgoing TLS
29079 contexts in bridge relays. Previously we would use the same
29080 identity keys for incoming and outgoing TLS contexts. Bugfix on
29081 0.2.0.3-alpha; addresses the other half of bug 988.
29082 - Avoid an assertion failure when we as an authority receive a
29083 duplicate upload of a router descriptor that we already have,
29084 but which we previously considered an obsolete descriptor.
29085 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
29086 - Avoid a crash bug triggered by looking at a dangling pointer while
29087 setting the network status consensus. Found by Robert Ransom.
29088 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
29089 - Fix a logic error where servers that _didn't_ act as exits would
29090 try to keep their server lists more aggressively up to date than
29091 exits, when it was supposed to be the other way around. Bugfix
29094 o Minor bugfixes (on Tor 0.2.1.x and earlier):
29095 - When we're trying to guess whether we know our IP address as
29096 a relay, we would log various ways that we failed to guess
29097 our address, but never log that we ended up guessing it
29098 successfully. Now add a log line to help confused and anxious
29099 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
29100 - Bring the logic that gathers routerinfos and assesses the
29101 acceptability of circuits into line. This prevents a Tor OP from
29102 getting locked in a cycle of choosing its local OR as an exit for a
29103 path (due to a .exit request) and then rejecting the circuit because
29104 its OR is not listed yet. It also prevents Tor clients from using an
29105 OR running in the same instance as an exit (due to a .exit request)
29106 if the OR does not meet the same requirements expected of an OR
29107 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
29108 - Correctly describe errors that occur when generating a TLS object.
29109 Previously we would attribute them to a failure while generating a
29110 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
29112 - Enforce multiplicity rules when parsing annotations. Bugfix on
29113 0.2.0.8-alpha. Found by piebeer.
29114 - Fix warnings that newer versions of autoconf produced during
29115 ./autogen.sh. These warnings appear to be harmless in our case,
29116 but they were extremely verbose. Fixes bug 2020.
29118 o Minor bugfixes (on Tor 0.2.2.x):
29119 - Enable protection of small arrays whenever we build with gcc
29120 hardening features, not only when also building with warnings
29121 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
29124 - Make hidden services work better in private Tor networks by not
29125 requiring any uptime to join the hidden service descriptor
29126 DHT. Implements ticket 2088.
29127 - Rate-limit the "your application is giving Tor only an IP address"
29128 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
29129 - When AllowSingleHopExits is set, print a warning to explain to the
29130 relay operator why most clients are avoiding her relay.
29131 - Update to the November 1 2010 Maxmind GeoLite Country database.
29133 o Code simplifications and refactoring:
29134 - When we fixed bug 1038 we had to put in a restriction not to send
29135 RELAY_EARLY cells on rend circuits. This was necessary as long
29136 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
29137 active. Now remove this obsolete check. Resolves bug 2081.
29138 - Some options used different conventions for uppercasing of acronyms
29139 when comparing manpage and source. Fix those in favor of the
29140 manpage, as it makes sense to capitalize acronyms.
29141 - Remove the torrc.complete file. It hasn't been kept up to date
29142 and users will have better luck checking out the manpage.
29143 - Remove the obsolete "NoPublish" option; it has been flagged
29144 as obsolete and has produced a warning since 0.1.1.18-rc.
29145 - Remove everything related to building the expert bundle for OS X.
29146 It has confused many users, doesn't work right on OS X 10.6,
29147 and is hard to get rid of once installed. Resolves bug 1274.
29150 Changes in version 0.2.2.17-alpha - 2010-09-30
29151 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
29152 to use one-hop circuits (which can put the exit relays at higher risk,
29153 plus unbalance the network); fixes a big bug in bandwidth accounting
29154 for relays that want to limit their monthly bandwidth use; fixes a
29155 big pile of bugs in how clients tolerate temporary network failure;
29156 and makes our adaptive circuit build timeout feature (which improves
29157 client performance if your network is fast while not breaking things
29158 if your network is slow) better handle bad networks.
29161 - Exit relays now try harder to block exit attempts from unknown
29162 relays, to make it harder for people to use them as one-hop proxies
29163 a la tortunnel. Controlled by the refuseunknownexits consensus
29164 parameter (currently enabled), or you can override it on your
29165 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
29167 o Major bugfixes (0.2.1.x and earlier):
29168 - Fix a bug in bandwidth accounting that could make us use twice
29169 the intended bandwidth when our interval start changes due to
29170 daylight saving time. Now we tolerate skew in stored vs computed
29171 interval starts: if the start of the period changes by no more than
29172 50% of the period's duration, we remember bytes that we transferred
29173 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
29174 - Always search the Windows system directory for system DLLs, and
29175 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
29176 - When you're using bridges and your network goes away and your
29177 bridges get marked as down, recover when you attempt a new socks
29178 connection (if the network is back), rather than waiting up to an
29179 hour to try fetching new descriptors for your bridges. Bugfix on
29180 0.2.0.3-alpha; fixes bug 1981.
29182 o Major bugfixes (on 0.2.2.x):
29183 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
29185 - Fix a segfault that could happen when operating a bridge relay with
29186 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
29187 - The consensus bandwidth-weights (used by clients to choose fast
29188 relays) entered an unexpected edge case in September where
29189 Exits were much scarcer than Guards, resulting in bad weight
29190 recommendations. Now we compute them using new constraints that
29191 should succeed in all cases. Also alter directory authorities to
29192 not include the bandwidth-weights line if they fail to produce
29193 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
29194 - When weighting bridges during path selection, we used to trust
29195 the bandwidths they provided in their descriptor, only capping them
29196 at 10MB/s. This turned out to be problematic for two reasons:
29197 Bridges could claim to handle a lot more traffic then they
29198 actually would, thus making more clients pick them and have a
29199 pretty effective DoS attack. The other issue is that new bridges
29200 that might not have a good estimate for their bw capacity yet
29201 would not get used at all unless no other bridges are available
29202 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
29204 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
29205 - Ignore cannibalized circuits when recording circuit build times.
29206 This should provide for a minor performance improvement for hidden
29207 service users using 0.2.2.14-alpha, and should remove two spurious
29208 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
29209 - Simplify the logic that causes us to decide if the network is
29210 unavailable for purposes of recording circuit build times. If we
29211 receive no cells whatsoever for the entire duration of a circuit's
29212 full measured lifetime, the network is probably down. Also ignore
29213 one-hop directory fetching circuit timeouts when calculating our
29214 circuit build times. These changes should hopefully reduce the
29215 cases where we see ridiculous circuit build timeouts for people
29216 with spotty wireless connections. Fixes part of bug 1772; bugfix
29218 - Prevent the circuit build timeout from becoming larger than
29219 the maximum build time we have ever seen. Also, prevent the time
29220 period for measurement circuits from becoming larger than twice that
29221 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
29224 - When we run out of directory information such that we can't build
29225 circuits, but then get enough that we can build circuits, log when
29226 we actually construct a circuit, so the user has a better chance of
29227 knowing what's going on. Fixes bug 1362.
29228 - Be more generous with how much bandwidth we'd use up (with
29229 accounting enabled) before entering "soft hibernation". Previously,
29230 we'd refuse new connections and circuits once we'd used up 95% of
29231 our allotment. Now, we use up 95% of our allotment, AND make sure
29232 that we have no more than 500MB (or 3 hours of expected traffic,
29233 whichever is lower) remaining before we enter soft hibernation.
29234 - If we've configured EntryNodes and our network goes away and/or all
29235 our entrynodes get marked down, optimistically retry them all when
29236 a new socks application request appears. Fixes bug 1882.
29237 - Add some more defensive programming for architectures that can't
29238 handle unaligned integer accesses. We don't know of any actual bugs
29239 right now, but that's the best time to fix them. Fixes bug 1943.
29240 - Support line continuations in the torrc config file. If a line
29241 ends with a single backslash character, the newline is ignored, and
29242 the configuration value is treated as continuing on the next line.
29245 o Minor bugfixes (on 0.2.1.x and earlier):
29246 - For bandwidth accounting, calculate our expected bandwidth rate
29247 based on the time during which we were active and not in
29248 soft-hibernation during the last interval. Previously, we were
29249 also considering the time spent in soft-hibernation. If this
29250 was a long time, we would wind up underestimating our bandwidth
29251 by a lot, and skewing our wakeup time towards the start of the
29252 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
29254 o Minor bugfixes (on 0.2.2.x):
29255 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
29256 which were disabled by the circuit build timeout changes in
29257 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
29258 - Make sure we don't warn about missing bandwidth weights when
29259 choosing bridges or other relays not in the consensus. Bugfix on
29260 0.2.2.10-alpha; fixes bug 1805.
29261 - In our logs, do not double-report signatures from unrecognized
29262 authorities both as "from unknown authority" and "not
29263 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
29266 Changes in version 0.2.2.16-alpha - 2010-09-17
29267 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
29268 evident at exit relays), and also continues to resolve all the little
29269 bugs that have been filling up trac lately.
29271 o Major bugfixes (stream-level fairness):
29272 - When receiving a circuit-level SENDME for a blocked circuit, try
29273 to package cells fairly from all the streams that had previously
29274 been blocked on that circuit. Previously, we had started with the
29275 oldest stream, and allowed each stream to potentially exhaust
29276 the circuit's package window. This gave older streams on any
29277 given circuit priority over newer ones. Fixes bug 1937. Detected
29278 originally by Camilo Viecco. This bug was introduced before the
29279 first Tor release, in svn commit r152: it is the new winner of
29280 the longest-lived bug prize.
29281 - When the exit relay got a circuit-level sendme cell, it started
29282 reading on the exit streams, even if had 500 cells queued in the
29283 circuit queue already, so the circuit queue just grew and grew in
29284 some cases. We fix this by not re-enabling reading on receipt of a
29285 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
29286 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
29288 - Newly created streams were allowed to read cells onto circuits,
29289 even if the circuit's cell queue was blocked and waiting to drain.
29290 This created potential unfairness, as older streams would be
29291 blocked, but newer streams would gladly fill the queue completely.
29292 We add code to detect this situation and prevent any stream from
29293 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
29297 - Update to the September 1 2010 Maxmind GeoLite Country database.
29298 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
29299 not. This would lead to a cookie that is still not group readable.
29300 Closes bug 1843. Suggested by katmagic.
29301 - When logging a rate-limited warning, we now mention how many messages
29302 got suppressed since the last warning.
29303 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
29304 do individual connection-level rate limiting of clients. The torrc
29305 config options with the same names trump the consensus params, if
29306 both are present. Replaces the old "bwconnrate" and "bwconnburst"
29307 consensus params which were broken from 0.2.2.7-alpha through
29308 0.2.2.14-alpha. Closes bug 1947.
29309 - When a router changes IP address or port, authorities now launch
29310 a new reachability test for it. Implements ticket 1899.
29311 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
29312 2 no signature, 4 required" messages about consensus signatures
29313 easier to read, and make sure they get logged at the same severity
29314 as the messages explaining which keys are which. Fixes bug 1290.
29315 - Don't warn when we have a consensus that we can't verify because
29316 of missing certificates, unless those certificates are ones
29317 that we have been trying and failing to download. Fixes bug 1145.
29318 - If you configure your bridge with a known identity fingerprint,
29319 and the bridge authority is unreachable (as it is in at least
29320 one country now), fall back to directly requesting the descriptor
29321 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
29323 - When building with --enable-gcc-warnings on OpenBSD, disable
29324 warnings in system headers. This makes --enable-gcc-warnings
29325 pass on OpenBSD 4.8.
29327 o Minor bugfixes (on 0.2.1.x and earlier):
29328 - Authorities will now attempt to download consensuses if their
29329 own efforts to make a live consensus have failed. This change
29330 means authorities that restart will fetch a valid consensus, and
29331 it means authorities that didn't agree with the current consensus
29332 will still fetch and serve it if it has enough signatures. Bugfix
29333 on 0.2.0.9-alpha; fixes bug 1300.
29334 - Ensure DNS requests launched by "RESOLVE" commands from the
29335 controller respect the __LeaveStreamsUnattached setconf options. The
29336 same goes for requests launched via DNSPort or transparent
29337 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
29338 - Allow handshaking OR connections to take a full KeepalivePeriod
29339 seconds to handshake. Previously, we would close them after
29340 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
29341 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
29343 - Rate-limit "Failed to hand off onionskin" warnings.
29344 - Never relay a cell for a circuit we have already destroyed.
29345 Between marking a circuit as closeable and finally closing it,
29346 it may have been possible for a few queued cells to get relayed,
29347 even though they would have been immediately dropped by the next
29348 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
29349 - Never queue a cell for a circuit that's already been marked
29351 - Never vote for a server as "Running" if we have a descriptor for
29352 it claiming to be hibernating, and that descriptor was published
29353 more recently than our last contact with the server. Bugfix on
29354 0.2.0.3-alpha; fixes bug 911.
29355 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
29358 o Minor bugfixes (on 0.2.2.x):
29359 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
29360 down if a directory fetch fails and you've configured either
29361 bridges or EntryNodes. The intent was to mark the relay as down
29362 _unless_ you're using bridges or EntryNodes, since if you are
29363 then you could quickly run out of entry points.
29364 - Fix the Windows directory-listing code. A bug introduced in
29365 0.2.2.14-alpha could make Windows directory servers forget to load
29366 some of their cached v2 networkstatus files.
29367 - Really allow clients to use relays as bridges. Fixes bug 1776;
29368 bugfix on 0.2.2.15-alpha.
29369 - Demote a warn to info that happens when the CellStatistics option
29370 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
29371 Reported by Moritz Bartl.
29372 - On Windows, build correctly either with or without Unicode support.
29373 This is necessary so that Tor can support fringe platforms like
29374 Windows 98 (which has no Unicode), or Windows CE (which has no
29375 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
29378 - Add a unit test for cross-platform directory-listing code.
29381 Changes in version 0.2.2.15-alpha - 2010-08-18
29382 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
29383 fixes a variety of other bugs that were preventing performance
29384 experiments from moving forward, fixes several bothersome memory leaks,
29385 and generally closes a lot of smaller bugs that have been filling up
29389 - Stop assigning the HSDir flag to relays that disable their
29390 DirPort (and thus will refuse to answer directory requests). This
29391 fix should dramatically improve the reachability of hidden services:
29392 hidden services and hidden service clients pick six HSDir relays
29393 to store and retrieve the hidden service descriptor, and currently
29394 about half of the HSDir relays will refuse to work. Bugfix on
29395 0.2.0.10-alpha; fixes part of bug 1693.
29396 - The PerConnBWRate and Burst config options, along with the
29397 bwconnrate and bwconnburst consensus params, initialized each conn's
29398 token bucket values only when the connection is established. Now we
29399 update them if the config options change, and update them every time
29400 we get a new consensus. Otherwise we can encounter an ugly edge
29401 case where we initialize an OR conn to client-level bandwidth,
29402 but then later the relay joins the consensus and we leave it
29403 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
29404 - Fix a regression that caused Tor to rebind its ports if it receives
29405 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
29408 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
29409 should give us approximately 40-50% more Guard-flagged nodes,
29410 improving the anonymity the Tor network can provide and also
29411 decreasing the dropoff in throughput that relays experience when
29412 they first get the Guard flag.
29413 - Allow enabling or disabling the *Statistics config options while
29417 - Update to the August 1 2010 Maxmind GeoLite Country database.
29418 - Have the controller interface give a more useful message than
29419 "Internal Error" in response to failed GETINFO requests.
29420 - Warn when the same option is provided more than once in a torrc
29421 file, on the command line, or in a single SETCONF statement, and
29422 the option is one that only accepts a single line. Closes bug 1384.
29423 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
29424 Patch from mingw-san.
29425 - Add support for the country code "{??}" in torrc options like
29426 ExcludeNodes, to indicate all routers of unknown country. Closes
29428 - Relays report the number of bytes spent on answering directory
29429 requests in extra-info descriptors similar to {read,write}-history.
29430 Implements enhancement 1790.
29432 o Minor bugfixes (on 0.2.1.x and earlier):
29433 - Complain if PublishServerDescriptor is given multiple arguments that
29434 include 0 or 1. This configuration will be rejected in the future.
29435 Bugfix on 0.2.0.1-alpha; closes bug 1107.
29436 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
29437 Bugfix on 0.2.0.13-alpha; closes bug 928.
29438 - Change "Application request when we're believed to be offline."
29439 notice to "Application request when we haven't used client
29440 functionality lately.", to clarify that it's not an error. Bugfix
29441 on 0.0.9.3; fixes bug 1222.
29442 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
29443 would return "551 Internal error" rather than "552 Unrecognized key
29444 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
29445 - Users can't configure a regular relay to be their bridge. It didn't
29446 work because when Tor fetched the bridge descriptor, it found
29447 that it already had it, and didn't realize that the purpose of the
29448 descriptor had changed. Now we replace routers with a purpose other
29449 than bridge with bridge descriptors when fetching them. Bugfix on
29450 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
29451 refetch the descriptor with router purpose 'general', disabling
29453 - Fix a rare bug in rend_fn unit tests: we would fail a test when
29454 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
29455 on 0.2.0.10-alpha; fixes bug 1808.
29456 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
29457 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
29458 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
29459 Servers can start sending this code when enough clients recognize
29460 it. Also update the spec to reflect this new reason. Bugfix on
29461 0.1.0.1-rc; fixes part of bug 1793.
29462 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
29463 when we switch from being a public relay to a bridge. Otherwise
29464 there will still be clients that see the relay in their consensus,
29465 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
29467 - Instead of giving an assertion failure on an internal mismatch
29468 on estimated freelist size, just log a BUG warning and try later.
29469 Mitigates but does not fix bug 1125.
29470 - Fix an assertion failure that could occur in caches or bridge users
29471 when using a very short voting interval on a testing network.
29472 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
29474 o Minor bugfixes (on 0.2.2.x):
29475 - Alter directory authorities to always consider Exit-flagged nodes
29476 as potential Guard nodes in their votes. The actual decision to
29477 use Exits as Guards is done in the consensus bandwidth weights.
29478 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
29479 - When the controller is reporting the purpose of circuits that
29480 didn't finish building before the circuit build timeout, it was
29481 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
29482 - Our libevent version parsing code couldn't handle versions like
29483 1.4.14b-stable and incorrectly warned the user about using an
29484 old and broken version of libevent. Treat 1.4.14b-stable like
29485 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
29487 - Don't use substitution references like $(VAR:MOD) when
29488 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
29489 '$(:x)' to 'x' rather than the empty string. This bites us in
29490 doc/ when configured with --disable-asciidoc. Bugfix on
29491 0.2.2.9-alpha; fixes bug 1773.
29492 - Remove a spurious hidden service server-side log notice about
29493 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
29495 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
29497 - Correctly report written bytes on linked connections. Found while
29498 implementing 1790. Bugfix on 0.2.2.4-alpha.
29499 - Fix three memory leaks: one in circuit_build_times_parse_state(),
29500 one in dirvote_add_signatures_to_pending_consensus(), and one every
29501 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
29502 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
29504 o Code simplifications and refactoring:
29505 - Take a first step towards making or.h smaller by splitting out
29506 function definitions for all source files in src/or/. Leave
29507 structures and defines in or.h for now.
29508 - Remove a bunch of unused function declarations as well as a block of
29509 #if 0'd code from the unit tests. Closes bug 1824.
29510 - New unit tests for exit-port history statistics; refactored exit
29511 statistics code to be more easily tested.
29512 - Remove the old debian/ directory from the main Tor distribution.
29513 The official Tor-for-debian git repository lives at the URL
29514 https://git.torproject.org/debian/tor.git
29517 Changes in version 0.2.2.14-alpha - 2010-07-12
29518 Tor 0.2.2.14-alpha greatly improves client-side handling of
29519 circuit build timeouts, which are used to estimate speed and improve
29520 performance. We also move to a much better GeoIP database, port Tor to
29521 Windows CE, introduce new compile flags that improve code security,
29522 add an eighth v3 directory authority, and address a lot of more
29526 - Tor directory authorities no longer crash when started with a
29527 cached-microdesc-consensus file in their data directory. Bugfix
29528 on 0.2.2.6-alpha; fixes bug 1532.
29529 - Treat an unset $HOME like an empty $HOME rather than triggering an
29530 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
29531 - Ignore negative and large circuit build timeout values that can
29532 happen during a suspend or hibernate. These values caused various
29533 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
29534 - Alter calculation of Pareto distribution parameter 'Xm' for
29535 Circuit Build Timeout learning to use the weighted average of the
29536 top N=3 modes (because we have three entry guards). Considering
29537 multiple modes should improve the timeout calculation in some cases,
29538 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
29540 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
29541 right censored distribution model. This approach improves over the
29542 synthetic timeout generation approach that was producing insanely
29543 high timeout values. Now we calculate build timeouts using truncated
29544 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
29545 - Do not close circuits that are under construction when they reach
29546 the circuit build timeout. Instead, leave them building (but do not
29547 use them) for up until the time corresponding to the 95th percentile
29548 on the Pareto CDF or 60 seconds, whichever is greater. This is done
29549 to provide better data for the new Pareto model. This percentile
29550 can be controlled by the consensus.
29553 - Move to the June 2010 Maxmind GeoLite country db (rather than the
29554 June 2009 ip-to-country GeoIP db) for our statistics that count
29555 how many users relays are seeing from each country. Now we have
29556 more accurate data for many African countries.
29557 - Port Tor to build and run correctly on Windows CE systems, using
29558 the wcecompat library. Contributed by Valerio Lupi.
29559 - New "--enable-gcc-hardening" ./configure flag (off by default)
29560 to turn on gcc compile time hardening options. It ensures
29561 that signed ints have defined behavior (-fwrapv), enables
29562 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
29563 with canaries (-fstack-protector-all), turns on ASLR protection if
29564 supported by the kernel (-fPIE, -pie), and adds additional security
29565 related warnings. Verified to work on Mac OS X and Debian Lenny.
29566 - New "--enable-linker-hardening" ./configure flag (off by default)
29567 to turn on ELF specific hardening features (relro, now). This does
29568 not work with Mac OS X or any other non-ELF binary format.
29570 o New directory authorities:
29571 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
29575 - New config option "WarnUnsafeSocks 0" disables the warning that
29576 occurs whenever Tor receives a socks handshake using a version of
29577 the socks protocol that can only provide an IP address (rather
29578 than a hostname). Setups that do DNS locally over Tor are fine,
29579 and we shouldn't spam the logs in that case.
29580 - Convert the HACKING file to asciidoc, and add a few new sections
29581 to it, explaining how we use Git, how we make changelogs, and
29582 what should go in a patch.
29583 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
29584 event, to give information on the current rate of circuit timeouts
29585 over our stored history.
29586 - Add ability to disable circuit build time learning via consensus
29587 parameter and via a LearnCircuitBuildTimeout config option. Also
29588 automatically disable circuit build time calculation if we are
29589 either a AuthoritativeDirectory, or if we fail to write our state
29590 file. Fixes bug 1296.
29591 - More gracefully handle corrupt state files, removing asserts
29592 in favor of saving a backup and resetting state.
29593 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
29597 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
29599 - When a2x fails, mention that the user could disable manpages instead
29600 of trying to fix their asciidoc installation.
29601 - Where available, use Libevent 2.0's periodic timers so that our
29602 once-per-second cleanup code gets called even more closely to
29603 once per second than it would otherwise. Fixes bug 943.
29604 - If you run a bridge that listens on multiple IP addresses, and
29605 some user configures a bridge address that uses a different IP
29606 address than your bridge writes in its router descriptor, and the
29607 user doesn't specify an identity key, their Tor would discard the
29608 descriptor because "it isn't one of our configured bridges", and
29609 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
29610 Bugfix on 0.2.0.3-alpha.
29611 - If OpenSSL fails to make a duplicate of a private or public key, log
29612 an error message and try to exit cleanly. May help with debugging
29613 if bug 1209 ever remanifests.
29614 - Save a couple bytes in memory allocation every time we escape
29615 certain characters in a string. Patch from Florian Zumbiehl.
29616 - Make it explicit that we don't cannibalize one-hop circuits. This
29617 happens in the wild, but doesn't turn out to be a problem because
29618 we fortunately don't use those circuits. Many thanks to outofwords
29619 for the initial analysis and to swissknife who confirmed that
29620 two-hop circuits are actually created.
29621 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
29622 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
29623 - Eliminate a case where a circuit build time warning was displayed
29624 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
29627 Changes in version 0.2.1.26 - 2010-05-02
29628 Tor 0.2.1.26 addresses the recent connection and memory overload
29629 problems we've been seeing on relays, especially relays with their
29630 DirPort open. If your relay has been crashing, or you turned it off
29631 because it used too many resources, give this release a try.
29633 This release also fixes yet another instance of broken OpenSSL libraries
29634 that was causing some relays to drop out of the consensus.
29637 - Teach relays to defend themselves from connection overload. Relays
29638 now close idle circuits early if it looks like they were intended
29639 for directory fetches. Relays are also more aggressive about closing
29640 TLS connections that have no circuits on them. Such circuits are
29641 unlikely to be re-used, and tens of thousands of them were piling
29642 up at the fast relays, causing the relays to run out of sockets
29643 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
29644 their directory fetches over TLS).
29645 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
29646 that claim to be earlier than 0.9.8m, but which have in reality
29647 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
29648 behavior. Possible fix for some cases of bug 1346.
29649 - Directory mirrors were fetching relay descriptors only from v2
29650 directory authorities, rather than v3 authorities like they should.
29651 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
29652 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
29655 - Finally get rid of the deprecated and now harmful notion of "clique
29656 mode", where directory authorities maintain TLS connections to
29660 - In the util/threads test, no longer free the test_mutex before all
29661 worker threads have finished. Bugfix on 0.2.1.6-alpha.
29662 - The master thread could starve the worker threads quite badly on
29663 certain systems, causing them to run only partially in the allowed
29664 window. This resulted in test failures. Now the master thread sleeps
29665 occasionally for a few microseconds while the two worker-threads
29666 compete for the mutex. Bugfix on 0.2.0.1-alpha.
29669 Changes in version 0.2.2.13-alpha - 2010-04-24
29670 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
29671 problems we've been seeing on relays, especially relays with their
29672 DirPort open. If your relay has been crashing, or you turned it off
29673 because it used too many resources, give this release a try.
29676 - Teach relays to defend themselves from connection overload. Relays
29677 now close idle circuits early if it looks like they were intended
29678 for directory fetches. Relays are also more aggressive about closing
29679 TLS connections that have no circuits on them. Such circuits are
29680 unlikely to be re-used, and tens of thousands of them were piling
29681 up at the fast relays, causing the relays to run out of sockets
29682 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
29683 their directory fetches over TLS).
29686 - Finally get rid of the deprecated and now harmful notion of "clique
29687 mode", where directory authorities maintain TLS connections to
29689 - Directory authorities now do an immediate reachability check as soon
29690 as they hear about a new relay. This change should slightly reduce
29691 the time between setting up a relay and getting listed as running
29692 in the consensus. It should also improve the time between setting
29693 up a bridge and seeing use by bridge users.
29694 - Directory authorities no longer launch a TLS connection to every
29695 relay as they startup. Now that we have 2k+ descriptors cached,
29696 the resulting network hiccup is becoming a burden. Besides,
29697 authorities already avoid voting about Running for the first half
29698 hour of their uptime.
29701 Changes in version 0.2.2.12-alpha - 2010-04-20
29702 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
29703 handle and vote on descriptors. It was causing relays to drop out of
29707 - Many relays have been falling out of the consensus lately because
29708 not enough authorities know about their descriptor for them to get
29709 a majority of votes. When we deprecated the v2 directory protocol,
29710 we got rid of the only way that v3 authorities can hear from each
29711 other about other descriptors. Now authorities examine every v3
29712 vote for new descriptors, and fetch them from that authority. Bugfix
29714 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
29715 and a warning in or.h related to bandwidth_weight_rule_t that
29716 prevented clean compile on OS X. Fixes bug 1363; bugfix on
29718 - Fix a segfault on relays when DirReqStatistics is enabled
29719 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
29723 - Demote a confusing TLS warning that relay operators might get when
29724 someone tries to talk to their OrPort. It is neither the operator's
29725 fault nor can they do anything about it. Fixes bug 1364; bugfix
29729 Changes in version 0.2.2.11-alpha - 2010-04-15
29730 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
29731 libraries that was causing some relays to drop out of the consensus.
29734 - Directory mirrors were fetching relay descriptors only from v2
29735 directory authorities, rather than v3 authorities like they should.
29736 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
29737 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
29738 - Fix a parsing error that made every possible value of
29739 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
29740 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
29741 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
29742 about the option without breaking older ones.
29743 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
29744 that claim to be earlier than 0.9.8m, but which have in reality
29745 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
29746 behavior. Possible fix for some cases of bug 1346.
29749 - Experiment with a more aggressive approach to preventing clients
29750 from making one-hop exit streams. Exit relays who want to try it
29751 out can set "RefuseUnknownExits 1" in their torrc, and then look
29752 for "Attempt by %s to open a stream" log messages. Let us know
29754 - Add support for statically linking zlib by specifying
29755 --enable-static-zlib, to go with our support for statically linking
29756 openssl and libevent. Resolves bug 1358.
29759 - Fix a segfault that happens whenever a Tor client that is using
29760 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
29762 - When we cleaned up the contrib/tor-exit-notice.html file, we left
29763 out the first line. Fixes bug 1295.
29764 - When building the manpage from a tarball, we required asciidoc, but
29765 the asciidoc -> roff/html conversion was already done for the
29766 tarball. Make 'make' complain only when we need asciidoc (either
29767 because we're compiling directly from git, or because we altered
29768 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
29769 - When none of the directory authorities vote on any params, Tor
29770 segfaulted when trying to make the consensus from the votes. We
29771 didn't trigger the bug in practice, because authorities do include
29772 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
29775 - In the util/threads test, no longer free the test_mutex before all
29776 worker threads have finished. Bugfix on 0.2.1.6-alpha.
29777 - The master thread could starve the worker threads quite badly on
29778 certain systems, causing them to run only partially in the allowed
29779 window. This resulted in test failures. Now the master thread sleeps
29780 occasionally for a few microseconds while the two worker-threads
29781 compete for the mutex. Bugfix on 0.2.0.1-alpha.
29784 Changes in version 0.2.2.10-alpha - 2010-03-07
29785 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
29786 could prevent relays from guessing their IP address correctly. It also
29787 starts the groundwork for another client-side performance boost, since
29788 currently we're not making efficient use of relays that have both the
29789 Guard flag and the Exit flag.
29792 - Fix a regression from our patch for bug 1244 that caused relays
29793 to guess their IP address incorrectly if they didn't set Address
29794 in their torrc and/or their address fails to resolve. Bugfix on
29795 0.2.2.9-alpha; fixes bug 1269.
29797 o Major features (performance):
29798 - Directory authorities now compute consensus weightings that instruct
29799 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
29800 and no flag. Clients that use these weightings will distribute
29801 network load more evenly across these different relay types. The
29802 weightings are in the consensus so we can change them globally in
29803 the future. Extra thanks to "outofwords" for finding some nasty
29804 security bugs in the first implementation of this feature.
29806 o Minor features (performance):
29807 - Always perform router selections using weighted relay bandwidth,
29808 even if we don't need a high capacity circuit at the time. Non-fast
29809 circuits now only differ from fast ones in that they can use relays
29810 not marked with the Fast flag. This "feature" could turn out to
29811 be a horrible bug; we should investigate more before it goes into
29815 - Allow disabling building of the manpages. Skipping the manpage
29816 speeds up the build considerably.
29818 o Minor bugfixes (on 0.2.2.x):
29819 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
29820 Bugfix on 0.2.2.9-alpha.
29821 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
29822 config option. Bugfix on 0.2.2.7-alpha.
29823 - Ship the asciidoc-helper file in the tarball, so that people can
29824 build from source if they want to, and touching the .1.txt files
29825 doesn't break the build. Bugfix on 0.2.2.9-alpha.
29827 o Minor bugfixes (on 0.2.1.x or earlier):
29828 - Fix a dereference-then-NULL-check sequence when publishing
29829 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
29831 - Fix another dereference-then-NULL-check sequence. Bugfix on
29832 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
29833 - Make sure we treat potentially not NUL-terminated strings correctly.
29834 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
29836 o Code simplifications and refactoring:
29837 - Fix some urls in the exit notice file and make it XHTML1.1 strict
29838 compliant. Based on a patch from Christian Kujau.
29839 - Don't use sed in asciidoc-helper anymore.
29840 - Make the build process fail if asciidoc cannot be found and
29841 building with asciidoc isn't disabled.
29844 Changes in version 0.2.2.9-alpha - 2010-02-22
29845 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
29846 location of a directory authority, and cleans up a bunch of small bugs.
29848 o Directory authority changes:
29849 - Change IP address for dannenberg (v3 directory authority), and
29850 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
29851 service directory authority) from the list.
29854 - Make Tor work again on the latest OS X: when deciding whether to
29855 use strange flags to turn TLS renegotiation on, detect the OpenSSL
29856 version at run-time, not compile time. We need to do this because
29857 Apple doesn't update its dev-tools headers when it updates its
29858 libraries in a security patch.
29859 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
29860 that could happen on 32-bit platforms with 64-bit time_t. Also fix
29861 a memory leak when requesting a hidden service descriptor we've
29862 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
29864 - Authorities could be tricked into giving out the Exit flag to relays
29865 that didn't allow exiting to any ports. This bug could screw
29866 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
29867 1238. Bug discovered by Martin Kowalczyk.
29868 - When freeing a session key, zero it out completely. We only zeroed
29869 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
29870 patched by ekir. Fixes bug 1254.
29873 - Fix static compilation by listing the openssl libraries in the right
29874 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
29875 - Resume handling .exit hostnames in a special way: originally we
29876 stripped the .exit part and used the requested exit relay. In
29877 0.2.2.1-alpha we stopped treating them in any special way, meaning
29878 if you use a .exit address then Tor will pass it on to the exit
29879 relay. Now we reject the .exit stream outright, since that behavior
29880 might be more expected by the user. Found and diagnosed by Scott
29881 Bennett and Downie on or-talk.
29882 - Don't spam the controller with events when we have no file
29883 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
29884 for log messages was already solved from bug 748.)
29885 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
29887 - Make the DNSPort option work with libevent 2.x. Don't alter the
29888 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
29889 - Emit a GUARD DROPPED controller event for a case we missed.
29890 - Make more fields in the controller protocol case-insensitive, since
29891 control-spec.txt said they were.
29892 - Refactor resolve_my_address() to not use gethostbyname() anymore.
29893 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
29894 - Fix a spec conformance issue: the network-status-version token
29895 must be the first token in a v3 consensus or vote. Discovered by
29896 parakeep. Bugfix on 0.2.0.3-alpha.
29898 o Code simplifications and refactoring:
29899 - Generate our manpage and HTML documentation using Asciidoc. This
29900 change should make it easier to maintain the documentation, and
29901 produce nicer HTML.
29902 - Remove the --enable-iphone option. According to reports from Marco
29903 Bonetti, Tor builds fine without any special tweaking on recent
29904 iPhone SDK versions.
29905 - Removed some unnecessary files from the source distribution. The
29906 AUTHORS file has now been merged into the people page on the
29907 website. The roadmaps and design doc can now be found in the
29908 projects directory in svn.
29909 - Enabled various circuit build timeout constants to be controlled
29910 by consensus parameters. Also set better defaults for these
29911 parameters based on experimentation on broadband and simulated
29912 high latency links.
29915 - The 'EXTENDCIRCUIT' control port command can now be used with
29916 a circ id of 0 and no path. This feature will cause Tor to build
29917 a new 'fast' general purpose circuit using its own path selection
29919 - Added a BUILDTIMEOUT_SET controller event to describe changes
29920 to the circuit build timeout.
29921 - Future-proof the controller protocol a bit by ignoring keyword
29922 arguments we do not recognize.
29923 - Expand homedirs passed to tor-checkkey. This should silence a
29924 coverity complaint about passing a user-supplied string into
29925 open() without checking it.
29928 Changes in version 0.2.1.25 - 2010-03-16
29929 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
29930 prevent relays from guessing their IP address correctly. It also fixes
29931 several minor potential security bugs.
29934 - Fix a regression from our patch for bug 1244 that caused relays
29935 to guess their IP address incorrectly if they didn't set Address
29936 in their torrc and/or their address fails to resolve. Bugfix on
29937 0.2.1.23; fixes bug 1269.
29938 - When freeing a session key, zero it out completely. We only zeroed
29939 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
29940 patched by ekir. Fixes bug 1254.
29943 - Fix a dereference-then-NULL-check sequence when publishing
29944 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
29946 - Fix another dereference-then-NULL-check sequence. Bugfix on
29947 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
29948 - Make sure we treat potentially not NUL-terminated strings correctly.
29949 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
29953 Changes in version 0.2.1.24 - 2010-02-21
29954 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
29958 - Work correctly out-of-the-box with even more vendor-patched versions
29959 of OpenSSL. In particular, make it so Debian and OS X don't need
29960 customized patches to run/build.
29963 Changes in version 0.2.1.23 - 2010-02-13
29964 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
29965 again on the latest OS X, and updates the location of a directory
29968 o Major bugfixes (performance):
29969 - We were selecting our guards uniformly at random, and then weighting
29970 which of our guards we'd use uniformly at random. This imbalance
29971 meant that Tor clients were severely limited on throughput (and
29972 probably latency too) by the first hop in their circuit. Now we
29973 select guards weighted by currently advertised bandwidth. We also
29974 automatically discard guards picked using the old algorithm. Fixes
29975 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
29978 - Make Tor work again on the latest OS X: when deciding whether to
29979 use strange flags to turn TLS renegotiation on, detect the OpenSSL
29980 version at run-time, not compile time. We need to do this because
29981 Apple doesn't update its dev-tools headers when it updates its
29982 libraries in a security patch.
29983 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
29984 that could happen on 32-bit platforms with 64-bit time_t. Also fix
29985 a memory leak when requesting a hidden service descriptor we've
29986 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
29989 o Directory authority changes:
29990 - Change IP address for dannenberg (v3 directory authority), and
29991 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
29992 service directory authority) from the list.
29995 - Refactor resolve_my_address() to not use gethostbyname() anymore.
29996 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
29999 - Avoid a mad rush at the beginning of each month when each client
30000 rotates half of its guards. Instead we spread the rotation out
30001 throughout the month, but we still avoid leaving a precise timestamp
30002 in the state file about when we first picked the guard. Improves
30003 over the behavior introduced in 0.1.2.17.
30006 Changes in version 0.2.2.8-alpha - 2010-01-26
30007 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
30008 causing bridge relays to disappear. If you're running a bridge,
30012 - Fix a memory corruption bug on bridges that occurred during the
30013 inclusion of stats data in extra-info descriptors. Also fix the
30014 interface for geoip_get_bridge_stats* to prevent similar bugs in
30015 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
30016 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
30019 - Ignore OutboundBindAddress when connecting to localhost.
30020 Connections to localhost need to come _from_ localhost, or else
30021 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
30025 Changes in version 0.2.2.7-alpha - 2010-01-19
30026 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
30027 as laying the groundwork for further relay-side performance fixes. It
30028 also starts cleaning up client behavior with respect to the EntryNodes,
30029 ExitNodes, and StrictNodes config options.
30031 This release also rotates two directory authority keys, due to a
30032 security breach of some of the Torproject servers.
30034 o Directory authority changes:
30035 - Rotate keys (both v3 identity and relay identity) for moria1
30038 o Major features (performance):
30039 - We were selecting our guards uniformly at random, and then weighting
30040 which of our guards we'd use uniformly at random. This imbalance
30041 meant that Tor clients were severely limited on throughput (and
30042 probably latency too) by the first hop in their circuit. Now we
30043 select guards weighted by currently advertised bandwidth. We also
30044 automatically discard guards picked using the old algorithm. Fixes
30045 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
30046 - When choosing which cells to relay first, relays can now favor
30047 circuits that have been quiet recently, to provide lower latency
30048 for low-volume circuits. By default, relays enable or disable this
30049 feature based on a setting in the consensus. You can override
30050 this default by using the new "CircuitPriorityHalflife" config
30051 option. Design and code by Ian Goldberg, Can Tang, and Chris
30053 - Add separate per-conn write limiting to go with the per-conn read
30054 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
30055 but never per-conn write limits.
30056 - New consensus params "bwconnrate" and "bwconnburst" to let us
30057 rate-limit client connections as they enter the network. It's
30058 controlled in the consensus so we can turn it on and off for
30059 experiments. It's starting out off. Based on proposal 163.
30061 o Major features (relay selection options):
30062 - Switch to a StrictNodes config option, rather than the previous
30063 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
30064 "StrictExcludeNodes" option.
30065 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
30066 change during a config reload, mark and discard all our origin
30067 circuits. This fix should address edge cases where we change the
30068 config options and but then choose a circuit that we created before
30070 - If EntryNodes or ExitNodes are set, be more willing to use an
30071 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
30073 - Make EntryNodes config option much more aggressive even when
30074 StrictNodes is not set. Before it would prepend your requested
30075 entrynodes to your list of guard nodes, but feel free to use others
30076 after that. Now it chooses only from your EntryNodes if any of
30077 those are available, and only falls back to others if a) they're
30078 all down and b) StrictNodes is not set.
30079 - Now we refresh your entry guards from EntryNodes at each consensus
30080 fetch -- rather than just at startup and then they slowly rot as
30081 the network changes.
30084 - Stop bridge directory authorities from answering dbg-stability.txt
30085 directory queries, which would let people fetch a list of all
30086 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30089 - Log a notice when we get a new control connection. Now it's easier
30090 for security-conscious users to recognize when a local application
30091 is knocking on their controller door. Suggested by bug 1196.
30092 - New config option "CircuitStreamTimeout" to override our internal
30093 timeout schedule for how many seconds until we detach a stream from
30094 a circuit and try a new circuit. If your network is particularly
30095 slow, you might want to set this to a number like 60.
30096 - New controller command "getinfo config-text". It returns the
30097 contents that Tor would write if you send it a SAVECONF command,
30098 so the controller can write the file to disk itself.
30099 - New options for SafeLogging to allow scrubbing only log messages
30100 generated while acting as a relay.
30101 - Ship the bridges spec file in the tarball too.
30102 - Avoid a mad rush at the beginning of each month when each client
30103 rotates half of its guards. Instead we spread the rotation out
30104 throughout the month, but we still avoid leaving a precise timestamp
30105 in the state file about when we first picked the guard. Improves
30106 over the behavior introduced in 0.1.2.17.
30108 o Minor bugfixes (compiling):
30109 - Fix compilation on OS X 10.3, which has a stub mlockall() but
30110 hides it. Bugfix on 0.2.2.6-alpha.
30111 - Fix compilation on Solaris by removing support for the
30112 DisableAllSwap config option. Solaris doesn't have an rlimit for
30113 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
30116 o Minor bugfixes (crashes):
30117 - Do not segfault when writing buffer stats when we haven't observed
30118 a single circuit to report about. Found by Fabian Lanze. Bugfix on
30120 - If we're in the pathological case where there's no exit bandwidth
30121 but there is non-exit bandwidth, or no guard bandwidth but there
30122 is non-guard bandwidth, don't crash during path selection. Bugfix
30124 - Fix an impossible-to-actually-trigger buffer overflow in relay
30125 descriptor generation. Bugfix on 0.1.0.15.
30127 o Minor bugfixes (privacy):
30128 - Fix an instance where a Tor directory mirror might accidentally
30129 log the IP address of a misbehaving Tor client. Bugfix on
30131 - Don't list Windows capabilities in relay descriptors. We never made
30132 use of them, and maybe it's a bad idea to publish them. Bugfix
30135 o Minor bugfixes (other):
30136 - Resolve an edge case in path weighting that could make us misweight
30137 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
30138 - Fix statistics on client numbers by country as seen by bridges that
30139 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
30140 intervals instead of variable 12-to-48-hour intervals.
30141 - After we free an internal connection structure, overwrite it
30142 with a different memory value than we use for overwriting a freed
30143 internal circuit structure. Should help with debugging. Suggested
30145 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
30148 o Removed features:
30149 - Remove the HSAuthorityRecordStats option that version 0 hidden
30150 service authorities could have used to track statistics of overall
30151 hidden service usage.
30154 Changes in version 0.2.1.22 - 2010-01-19
30155 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
30156 authorities -- it would tell you its whole history of bridge descriptors
30157 if you make the right directory request. This stable update also
30158 rotates two of the seven v3 directory authority keys and locations.
30160 o Directory authority changes:
30161 - Rotate keys (both v3 identity and relay identity) for moria1
30165 - Stop bridge directory authorities from answering dbg-stability.txt
30166 directory queries, which would let people fetch a list of all
30167 bridge identities they track. Bugfix on 0.2.1.6-alpha.
30170 Changes in version 0.2.1.21 - 2009-12-21
30171 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
30172 library. If you use Tor on Linux / Unix and you're getting SSL
30173 renegotiation errors, upgrading should help. We also recommend an
30174 upgrade if you're an exit relay.
30177 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30178 handshake from working unless we explicitly tell OpenSSL that we
30179 are using SSL renegotiation safely. We are, of course, but OpenSSL
30180 0.9.8l won't work unless we say we are.
30181 - Avoid crashing if the client is trying to upload many bytes and the
30182 circuit gets torn down at the same time, or if the flip side
30183 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
30186 - Do not refuse to learn about authority certs and v2 networkstatus
30187 documents that are older than the latest consensus. This bug might
30188 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30189 Spotted and fixed by xmux.
30190 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
30191 trigger platform-specific option misparsing case found by Coverity
30193 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
30194 trigger assert. Fixes bug 1173.
30197 Changes in version 0.2.2.6-alpha - 2009-11-19
30198 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
30199 support for the new lower-footprint "microdescriptor" directory design,
30200 future-proofing our consensus format against new hash functions or
30201 other changes, and an Android port. It also makes Tor compatible with
30202 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
30205 - Directory authorities can now create, vote on, and serve multiple
30206 parallel formats of directory data as part of their voting process.
30207 Partially implements Proposal 162: "Publish the consensus in
30209 - Directory authorities can now agree on and publish small summaries
30210 of router information that clients can use in place of regular
30211 server descriptors. This transition will eventually allow clients
30212 to use far less bandwidth for downloading information about the
30213 network. Begins the implementation of Proposal 158: "Clients
30214 download consensus + microdescriptors".
30215 - The directory voting system is now extensible to use multiple hash
30216 algorithms for signatures and resource selection. Newer formats
30217 are signed with SHA256, with a possibility for moving to a better
30218 hash algorithm in the future.
30219 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
30220 current and future memory pages via mlockall(). On supported
30221 platforms (modern Linux and probably BSD but not Windows or OS X),
30222 this should effectively disable any and all attempts to page out
30223 memory. This option requires that you start your Tor as root --
30224 if you use DisableAllSwap, please consider using the User option
30225 to properly reduce the privileges of your Tor.
30226 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
30227 to help Tor build correctly for Android phones.
30230 - Work around a security feature in OpenSSL 0.9.8l that prevents our
30231 handshake from working unless we explicitly tell OpenSSL that we
30232 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
30233 won't work unless we say we are.
30236 - Fix a crash bug when trying to initialize the evdns module in
30237 Libevent 2. Bugfix on 0.2.1.16-rc.
30238 - Stop logging at severity 'warn' when some other Tor client tries
30239 to establish a circuit with us using weak DH keys. It's a protocol
30240 violation, but that doesn't mean ordinary users need to hear about
30241 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
30242 - Do not refuse to learn about authority certs and v2 networkstatus
30243 documents that are older than the latest consensus. This bug might
30244 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
30245 Spotted and fixed by xmux.
30246 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
30247 - If all authorities restart at once right before a consensus vote,
30248 nobody will vote about "Running", and clients will get a consensus
30249 with no usable relays. Instead, authorities refuse to build a
30250 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
30251 - If your relay can't keep up with the number of incoming create
30252 cells, it would log one warning per failure into your logs. Limit
30253 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
30254 - Bridges now use "reject *:*" as their default exit policy. Bugfix
30255 on 0.2.0.3-alpha; fixes bug 1113.
30256 - Fix a memory leak on directory authorities during voting that was
30257 introduced in 0.2.2.1-alpha. Found via valgrind.
30260 Changes in version 0.2.1.20 - 2009-10-15
30261 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
30262 services at once, prepares for more performance improvements, and
30263 fixes a bunch of smaller bugs.
30265 The Windows and OS X bundles also include a more recent Vidalia,
30266 and switch from Privoxy to Polipo.
30268 The OS X installers are now drag and drop. It's best to un-install
30269 Tor/Vidalia and then install this new bundle, rather than upgrade. If
30270 you want to upgrade, you'll need to update the paths for Tor and Polipo
30271 in the Vidalia Settings window.
30274 - Send circuit or stream sendme cells when our window has decreased
30275 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30276 by Karsten when testing the "reduce circuit window" performance
30277 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30278 before the release of Tor 0.0.0. This is the new winner of the
30280 - Fix a remotely triggerable memory leak when a consensus document
30281 contains more than one signature from the same voter. Bugfix on
30283 - Avoid segfault in rare cases when finishing an introduction circuit
30284 as a client and finding out that we don't have an introduction key
30285 for it. Fixes bug 1073. Reported by Aaron Swartz.
30288 - Tor now reads the "circwindow" parameter out of the consensus,
30289 and uses that value for its circuit package window rather than the
30290 default of 1000 cells. Begins the implementation of proposal 168.
30292 o New directory authorities:
30293 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30295 - Move moria1 and tonga to alternate IP addresses.
30298 - Fix a signed/unsigned compile warning in 0.2.1.19.
30299 - Fix possible segmentation fault on directory authorities. Bugfix on
30301 - Fix an extremely rare infinite recursion bug that could occur if
30302 we tried to log a message after shutting down the log subsystem.
30303 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30304 - Fix an obscure bug where hidden services on 64-bit big-endian
30305 systems might mis-read the timestamp in v3 introduce cells, and
30306 refuse to connect back to the client. Discovered by "rotor".
30307 Bugfix on 0.2.1.6-alpha.
30308 - We were triggering a CLOCK_SKEW controller status event whenever
30309 we connect via the v2 connection protocol to any relay that has
30310 a wrong clock. Instead, we should only inform the controller when
30311 it's a trusted authority that claims our clock is wrong. Bugfix
30312 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30313 - We were telling the controller about CHECKING_REACHABILITY and
30314 REACHABILITY_FAILED status events whenever we launch a testing
30315 circuit or notice that one has failed. Instead, only tell the
30316 controller when we want to inform the user of overall success or
30317 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30319 - Don't warn when we're using a circuit that ends with a node
30320 excluded in ExcludeExitNodes, but the circuit is not used to access
30321 the outside world. This should help fix bug 1090. Bugfix on
30323 - Work around a small memory leak in some versions of OpenSSL that
30324 stopped the memory used by the hostname TLS extension from being
30328 - Add a "getinfo status/accepted-server-descriptor" controller
30329 command, which is the recommended way for controllers to learn
30330 whether our server descriptor has been successfully received by at
30331 least on directory authority. Un-recommend good-server-descriptor
30332 getinfo and status events until we have a better design for them.
30335 Changes in version 0.2.2.5-alpha - 2009-10-11
30336 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
30339 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
30341 o Directory authorities:
30342 - Temporarily (just for this release) move dizum to an alternate
30346 Changes in version 0.2.2.4-alpha - 2009-10-10
30347 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
30348 introduces a new unit test framework, shifts directry authority
30349 addresses around to reduce the impact from recent blocking events,
30350 and fixes a few smaller bugs.
30353 - Fix several more asserts in the circuit_build_times code, for
30354 example one that causes Tor to fail to start once we have
30355 accumulated 5000 build times in the state file. Bugfixes on
30356 0.2.2.2-alpha; fixes bug 1108.
30358 o New directory authorities:
30359 - Move moria1 and Tonga to alternate IP addresses.
30362 - Log SSL state transitions at debug level during handshake, and
30363 include SSL states in error messages. This may help debug future
30364 SSL handshake issues.
30365 - Add a new "Handshake" log domain for activities that happen
30366 during the TLS handshake.
30367 - Revert to the "June 3 2009" ip-to-country file. The September one
30368 seems to have removed most US IP addresses.
30369 - Directory authorities now reject Tor relays with versions less than
30370 0.1.2.14. This step cuts out four relays from the current network,
30371 none of which are very big.
30374 - Fix a couple of smaller issues with gathering statistics. Bugfixes
30376 - Fix two memory leaks in the error case of
30377 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
30378 - Don't count one-hop circuits when we're estimating how long it
30379 takes circuits to build on average. Otherwise we'll set our circuit
30380 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
30381 - Directory authorities no longer change their opinion of, or vote on,
30382 whether a router is Running, unless they have themselves been
30383 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
30386 o Code simplifications and refactoring:
30387 - Revise our unit tests to use the "tinytest" framework, so we
30388 can run tests in their own processes, have smarter setup/teardown
30389 code, and so on. The unit test code has moved to its own
30390 subdirectory, and has been split into multiple modules.
30393 Changes in version 0.2.2.3-alpha - 2009-09-23
30394 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
30397 - Fix an overzealous assert in our new circuit build timeout code.
30398 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
30401 - If the networkstatus consensus tells us that we should use a
30402 negative circuit package window, ignore it. Otherwise we'll
30403 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
30406 Changes in version 0.2.2.2-alpha - 2009-09-21
30407 Tor 0.2.2.2-alpha introduces our latest performance improvement for
30408 clients: Tor tracks the average time it takes to build a circuit, and
30409 avoids using circuits that take too long to build. For fast connections,
30410 this feature can cut your expected latency in half. For slow or flaky
30411 connections, it could ruin your Tor experience. Let us know if it does!
30414 - Tor now tracks how long it takes to build client-side circuits
30415 over time, and adapts its timeout to local network performance.
30416 Since a circuit that takes a long time to build will also provide
30417 bad performance, we get significant latency improvements by
30418 discarding the slowest 20% of circuits. Specifically, Tor creates
30419 circuits more aggressively than usual until it has enough data
30420 points for a good timeout estimate. Implements proposal 151.
30421 We are especially looking for reports (good and bad) from users with
30422 both EDGE and broadband connections that can move from broadband
30423 to EDGE and find out if the build-time data in the .tor/state gets
30424 reset without loss of Tor usability. You should also see a notice
30425 log message telling you that Tor has reset its timeout.
30426 - Directory authorities can now vote on arbitrary integer values as
30427 part of the consensus process. This is designed to help set
30428 network-wide parameters. Implements proposal 167.
30429 - Tor now reads the "circwindow" parameter out of the consensus,
30430 and uses that value for its circuit package window rather than the
30431 default of 1000 cells. Begins the implementation of proposal 168.
30434 - Fix a remotely triggerable memory leak when a consensus document
30435 contains more than one signature from the same voter. Bugfix on
30439 - Fix an extremely rare infinite recursion bug that could occur if
30440 we tried to log a message after shutting down the log subsystem.
30441 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
30442 - Fix parsing for memory or time units given without a space between
30443 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
30444 - A networkstatus vote must contain exactly one signature. Spec
30445 conformance issue. Bugfix on 0.2.0.3-alpha.
30446 - Fix an obscure bug where hidden services on 64-bit big-endian
30447 systems might mis-read the timestamp in v3 introduce cells, and
30448 refuse to connect back to the client. Discovered by "rotor".
30449 Bugfix on 0.2.1.6-alpha.
30450 - We were triggering a CLOCK_SKEW controller status event whenever
30451 we connect via the v2 connection protocol to any relay that has
30452 a wrong clock. Instead, we should only inform the controller when
30453 it's a trusted authority that claims our clock is wrong. Bugfix
30454 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
30455 - We were telling the controller about CHECKING_REACHABILITY and
30456 REACHABILITY_FAILED status events whenever we launch a testing
30457 circuit or notice that one has failed. Instead, only tell the
30458 controller when we want to inform the user of overall success or
30459 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
30461 - Don't warn when we're using a circuit that ends with a node
30462 excluded in ExcludeExitNodes, but the circuit is not used to access
30463 the outside world. This should help fix bug 1090, but more problems
30464 remain. Bugfix on 0.2.1.6-alpha.
30465 - Work around a small memory leak in some versions of OpenSSL that
30466 stopped the memory used by the hostname TLS extension from being
30468 - Make our 'torify' script more portable; if we have only one of
30469 'torsocks' or 'tsocks' installed, don't complain to the user;
30470 and explain our warning about tsocks better.
30473 - Add a "getinfo status/accepted-server-descriptor" controller
30474 command, which is the recommended way for controllers to learn
30475 whether our server descriptor has been successfully received by at
30476 least on directory authority. Un-recommend good-server-descriptor
30477 getinfo and status events until we have a better design for them.
30478 - Update to the "September 4 2009" ip-to-country file.
30481 Changes in version 0.2.2.1-alpha - 2009-08-26
30482 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
30483 Tor clients to bootstrap on networks where only port 80 is reachable,
30484 makes it more straightforward to support hardware crypto accelerators,
30485 and starts the groundwork for gathering stats safely at relays.
30488 - Start the process of disabling ".exit" address notation, since it
30489 can be used for a variety of esoteric application-level attacks
30490 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
30493 o New directory authorities:
30494 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
30498 - New AccelName and AccelDir options add support for dynamic OpenSSL
30499 hardware crypto acceleration engines.
30500 - Tor now supports tunneling all of its outgoing connections over
30501 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
30502 configuration options. Code by Christopher Davis.
30505 - Send circuit or stream sendme cells when our window has decreased
30506 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
30507 by Karsten when testing the "reduce circuit window" performance
30508 patch. Bugfix on the 54th commit on Tor -- from July 2002,
30509 before the release of Tor 0.0.0. This is the new winner of the
30512 o New options for gathering stats safely:
30513 - Directory mirrors that set "DirReqStatistics 1" write statistics
30514 about directory requests to disk every 24 hours. As compared to the
30515 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
30516 1) stats are written to disk exactly every 24 hours; 2) estimated
30517 shares of v2 and v3 requests are determined as mean values, not at
30518 the end of a measurement period; 3) unresolved requests are listed
30519 with country code '??'; 4) directories also measure download times.
30520 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
30521 number of exit streams and transferred bytes per port to disk every
30523 - Relays that set "CellStatistics 1" write statistics on how long
30524 cells spend in their circuit queues to disk every 24 hours.
30525 - Entry nodes that set "EntryStatistics 1" write statistics on the
30526 rough number and origins of connecting clients to disk every 24
30528 - Relays that write any of the above statistics to disk and set
30529 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
30530 their extra-info documents.
30533 - New --digests command-line switch to output the digests of the
30534 source files Tor was built with.
30535 - The "torify" script now uses torsocks where available.
30536 - The memarea code now uses a sentinel value at the end of each area
30537 to make sure nothing writes beyond the end of an area. This might
30538 help debug some conceivable causes of bug 930.
30539 - Time and memory units in the configuration file can now be set to
30540 fractional units. For example, "2.5 GB" is now a valid value for
30542 - Certain Tor clients (such as those behind check.torproject.org) may
30543 want to fetch the consensus in an extra early manner. To enable this
30544 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
30545 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
30546 as only certain clients who must have this information sooner should
30548 - Instead of adding the svn revision to the Tor version string, report
30549 the git commit (when we're building from a git checkout).
30552 - If any of the v3 certs we download are unparseable, we should
30553 actually notice the failure so we don't retry indefinitely. Bugfix
30554 on 0.2.0.x; reported by "rotator".
30555 - If the cached cert file is unparseable, warn but don't exit.
30556 - Fix possible segmentation fault on directory authorities. Bugfix on
30558 - When Tor fails to parse a descriptor of any kind, dump it to disk.
30559 Might help diagnosing bug 1051.
30561 o Deprecated and removed features:
30562 - The controller no longer accepts the old obsolete "addr-mappings/"
30563 or "unregistered-servers-" GETINFO values.
30564 - Hidden services no longer publish version 0 descriptors, and clients
30565 do not request or use version 0 descriptors. However, the old hidden
30566 service authorities still accept and serve version 0 descriptors
30567 when contacted by older hidden services/clients.
30568 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
30569 always on; using them is necessary for correct forward-compatible
30571 - Remove support for .noconnect style addresses. Nobody was using
30572 them, and they provided another avenue for detecting Tor users
30573 via application-level web tricks.
30575 o Packaging changes:
30576 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
30577 installer bundles. See
30578 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
30579 for details of what's new in Vidalia 0.2.3.
30580 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
30581 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
30582 configuration file, rather than the old Privoxy.
30583 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
30584 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
30585 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
30586 better compatibility with OS X 10.6, aka Snow Leopard.
30587 - OS X Vidalia Bundle: The multi-package installer is now replaced
30588 by a simple drag and drop to the /Applications folder. This change
30589 occurred with the upgrade to Vidalia 0.2.3.
30592 Changes in version 0.2.1.19 - 2009-07-28
30593 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
30594 services on Tor 0.2.1.3-alpha through 0.2.1.18.
30597 - Make accessing hidden services on 0.2.1.x work right again.
30598 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
30599 part of patch provided by "optimist".
30602 - When a relay/bridge is writing out its identity key fingerprint to
30603 the "fingerprint" file and to its logs, write it without spaces. Now
30604 it will look like the fingerprints in our bridges documentation,
30605 and confuse fewer users.
30608 - Relays no longer publish a new server descriptor if they change
30609 their MaxAdvertisedBandwidth config option but it doesn't end up
30610 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
30611 fixes bug 1026. Patch from Sebastian.
30612 - Avoid leaking memory every time we get a create cell but we have
30613 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
30614 fixes bug 1034. Reported by BarkerJr.
30617 Changes in version 0.2.1.18 - 2009-07-24
30618 Tor 0.2.1.18 lays the foundations for performance improvements,
30619 adds status events to help users diagnose bootstrap problems, adds
30620 optional authentication/authorization for hidden services, fixes a
30621 variety of potential anonymity problems, and includes a huge pile of
30622 other features and bug fixes.
30625 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
30628 Changes in version 0.2.1.17-rc - 2009-07-07
30629 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
30630 candidate for the 0.2.1.x series. It lays the groundwork for further
30631 client performance improvements, and also fixes a big bug with directory
30632 authorities that were causing them to assign Guard and Stable flags
30635 The Windows bundles also finally include the geoip database that we
30636 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
30637 should actually install Torbutton rather than giving you a cryptic
30638 failure message (oops).
30641 - Clients now use the bandwidth values in the consensus, rather than
30642 the bandwidth values in each relay descriptor. This approach opens
30643 the door to more accurate bandwidth estimates once the directory
30644 authorities start doing active measurements. Implements more of
30648 - When Tor clients restart after 1-5 days, they discard all their
30649 cached descriptors as too old, but they still use the cached
30650 consensus document. This approach is good for robustness, but
30651 bad for performance: since they don't know any bandwidths, they
30652 end up choosing at random rather than weighting their choice by
30653 speed. Fixed by the above feature of putting bandwidths in the
30654 consensus. Bugfix on 0.2.0.x.
30655 - Directory authorities were neglecting to mark relays down in their
30656 internal histories if the relays fall off the routerlist without
30657 ever being found unreachable. So there were relays in the histories
30658 that haven't been seen for eight months, and are listed as being
30659 up for eight months. This wreaked havoc on the "median wfu"
30660 and "median mtbf" calculations, in turn making Guard and Stable
30661 flags very wrong, hurting network performance. Fixes bugs 696 and
30662 969. Bugfix on 0.2.0.6-alpha.
30665 - Serve the DirPortFrontPage page even when we have been approaching
30666 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
30667 - The control port would close the connection before flushing long
30668 replies, such as the network consensus, if a QUIT command was issued
30669 before the reply had completed. Now, the control port flushes all
30670 pending replies before closing the connection. Also fixed a spurious
30671 warning when a QUIT command is issued after a malformed or rejected
30672 AUTHENTICATE command, but before the connection was closed. Patch
30673 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
30674 - When we can't find an intro key for a v2 hidden service descriptor,
30675 fall back to the v0 hidden service descriptor and log a bug message.
30676 Workaround for bug 1024.
30677 - Fix a log message that did not respect the SafeLogging option.
30681 - If we're a relay and we change our IP address, be more verbose
30682 about the reason that made us change. Should help track down
30683 further bugs for relays on dynamic IP addresses.
30686 Changes in version 0.2.0.35 - 2009-06-24
30688 - Avoid crashing in the presence of certain malformed descriptors.
30689 Found by lark, and by automated fuzzing.
30690 - Fix an edge case where a malicious exit relay could convince a
30691 controller that the client's DNS question resolves to an internal IP
30692 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
30695 - Finally fix the bug where dynamic-IP relays disappear when their
30696 IP address changes: directory mirrors were mistakenly telling
30697 them their old address if they asked via begin_dir, so they
30698 never got an accurate answer about their new address, so they
30699 just vanished after a day. For belt-and-suspenders, relays that
30700 don't set Address in their config now avoid using begin_dir for
30701 all direct connections. Should fix bugs 827, 883, and 900.
30702 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
30703 that would occur on some exit nodes when DNS failures and timeouts
30704 occurred in certain patterns. Fix for bug 957.
30707 - When starting with a cache over a few days old, do not leak
30708 memory for the obsolete router descriptors in it. Bugfix on
30709 0.2.0.33; fixes bug 672.
30710 - Hidden service clients didn't use a cached service descriptor that
30711 was older than 15 minutes, but wouldn't fetch a new one either,
30712 because there was already one in the cache. Now, fetch a v2
30713 descriptor unless the same descriptor was added to the cache within
30714 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
30717 Changes in version 0.2.1.16-rc - 2009-06-20
30718 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
30719 a bunch of minor bugs.
30722 - Fix an edge case where a malicious exit relay could convince a
30723 controller that the client's DNS question resolves to an internal IP
30724 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
30726 o Major performance improvements (on 0.2.0.x):
30727 - Disable and refactor some debugging checks that forced a linear scan
30728 over the whole server-side DNS cache. These accounted for over 50%
30729 of CPU time on a relatively busy exit node's gprof profile. Found
30731 - Disable some debugging checks that appeared in exit node profile
30735 - Update to the "June 3 2009" ip-to-country file.
30736 - Do not have tor-resolve automatically refuse all .onion addresses;
30737 if AutomapHostsOnResolve is set in your torrc, this will work fine.
30739 o Minor bugfixes (on 0.2.0.x):
30740 - Log correct error messages for DNS-related network errors on
30742 - Fix a race condition that could cause crashes or memory corruption
30743 when running as a server with a controller listening for log
30745 - Avoid crashing when we have a policy specified in a DirPolicy or
30746 SocksPolicy or ReachableAddresses option with ports set on it,
30747 and we re-load the policy. May fix bug 996.
30748 - Hidden service clients didn't use a cached service descriptor that
30749 was older than 15 minutes, but wouldn't fetch a new one either,
30750 because there was already one in the cache. Now, fetch a v2
30751 descriptor unless the same descriptor was added to the cache within
30752 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
30754 o Minor bugfixes (on 0.2.1.x):
30755 - Don't warn users about low port and hibernation mix when they
30756 provide a *ListenAddress directive to fix that. Bugfix on
30758 - When switching back and forth between bridge mode, do not start
30759 gathering GeoIP data until two hours have passed.
30760 - Do not complain that the user has requested an excluded node as
30761 an exit when the node is not really an exit. This could happen
30762 because the circuit was for testing, or an introduction point.
30766 Changes in version 0.2.1.15-rc - 2009-05-25
30767 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
30768 series. It fixes a major bug on fast exit relays, as well as a variety
30769 of more minor bugs.
30771 o Major bugfixes (on 0.2.0.x):
30772 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
30773 that would occur on some exit nodes when DNS failures and timeouts
30774 occurred in certain patterns. Fix for bug 957.
30776 o Minor bugfixes (on 0.2.0.x):
30777 - Actually return -1 in the error case for read_bandwidth_usage().
30778 Harmless bug, since we currently don't care about the return value
30779 anywhere. Bugfix on 0.2.0.9-alpha.
30780 - Provide a more useful log message if bug 977 (related to buffer
30781 freelists) ever reappears, and do not crash right away.
30782 - Fix an assertion failure on 64-bit platforms when we allocated
30783 memory right up to the end of a memarea, then realigned the memory
30784 one step beyond the end. Fixes a possible cause of bug 930.
30785 - Protect the count of open sockets with a mutex, so we can't
30786 corrupt it when two threads are closing or opening sockets at once.
30787 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
30788 - Don't allow a bridge to publish its router descriptor to a
30789 non-bridge directory authority. Fixes part of bug 932.
30790 - When we change to or from being a bridge, reset our counts of
30791 client usage by country. Fixes bug 932.
30792 - Fix a bug that made stream bandwidth get misreported to the
30794 - Stop using malloc_usable_size() to use more area than we had
30795 actually allocated: it was safe, but made valgrind really unhappy.
30796 - Fix a memory leak when v3 directory authorities load their keys
30797 and cert from disk. Bugfix on 0.2.0.1-alpha.
30799 o Minor bugfixes (on 0.2.1.x):
30800 - Fix use of freed memory when deciding to mark a non-addable
30801 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
30804 Changes in version 0.2.1.14-rc - 2009-04-12
30805 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
30806 series. It begins fixing some major performance problems, and also
30807 finally addresses the bug that was causing relays on dynamic IP
30808 addresses to fall out of the directory.
30811 - Clients replace entry guards that were chosen more than a few months
30812 ago. This change should significantly improve client performance,
30813 especially once more people upgrade, since relays that have been
30814 a guard for a long time are currently overloaded.
30816 o Major bugfixes (on 0.2.0):
30817 - Finally fix the bug where dynamic-IP relays disappear when their
30818 IP address changes: directory mirrors were mistakenly telling
30819 them their old address if they asked via begin_dir, so they
30820 never got an accurate answer about their new address, so they
30821 just vanished after a day. For belt-and-suspenders, relays that
30822 don't set Address in their config now avoid using begin_dir for
30823 all direct connections. Should fix bugs 827, 883, and 900.
30824 - Relays were falling out of the networkstatus consensus for
30825 part of a day if they changed their local config but the
30826 authorities discarded their new descriptor as "not sufficiently
30827 different". Now directory authorities accept a descriptor as changed
30828 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
30829 patch by Sebastian.
30830 - Avoid crashing in the presence of certain malformed descriptors.
30831 Found by lark, and by automated fuzzing.
30834 - When generating circuit events with verbose nicknames for
30835 controllers, try harder to look up nicknames for routers on a
30836 circuit. (Previously, we would look in the router descriptors we had
30837 for nicknames, but not in the consensus.) Partial fix for bug 941.
30838 - If the bridge config line doesn't specify a port, assume 443.
30839 This makes bridge lines a bit smaller and easier for users to
30841 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
30842 bytes (aka 20KB/s), to match our documentation. Also update
30843 directory authorities so they always assign the Fast flag to relays
30844 with 20KB/s of capacity. Now people running relays won't suddenly
30845 find themselves not seeing any use, if the network gets faster
30847 - Update to the "April 3 2009" ip-to-country file.
30850 - Avoid trying to print raw memory to the logs when we decide to
30851 give up on downloading a given relay descriptor. Bugfix on
30853 - In tor-resolve, when the Tor client to use is specified by
30854 <hostname>:<port>, actually use the specified port rather than
30855 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
30856 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
30857 - When starting with a cache over a few days old, do not leak
30858 memory for the obsolete router descriptors in it. Bugfix on
30860 - Avoid double-free on list of successfully uploaded hidden
30861 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
30862 - Change memarea_strndup() implementation to work even when
30863 duplicating a string at the end of a page. This bug was
30864 harmless for now, but could have meant crashes later. Fix by
30865 lark. Bugfix on 0.2.1.1-alpha.
30866 - Limit uploaded directory documents to be 16M rather than 500K.
30867 The directory authorities were refusing v3 consensus votes from
30868 other authorities, since the votes are now 504K. Fixes bug 959;
30869 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
30870 - Directory authorities should never send a 503 "busy" response to
30871 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
30875 Changes in version 0.2.1.13-alpha - 2009-03-09
30876 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
30877 cleanups. We're finally getting close to a release candidate.
30880 - Correctly update the list of which countries we exclude as
30881 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
30882 lark. Bugfix on 0.2.1.6-alpha.
30884 o Minor bugfixes (on 0.2.0.x and earlier):
30885 - Automatically detect MacOSX versions earlier than 10.4.0, and
30886 disable kqueue from inside Tor when running with these versions.
30887 We previously did this from the startup script, but that was no
30888 help to people who didn't use the startup script. Resolves bug 863.
30889 - When we had picked an exit node for a connection, but marked it as
30890 "optional", and it turned out we had no onion key for the exit,
30891 stop wanting that exit and try again. This situation may not
30892 be possible now, but will probably become feasible with proposal
30893 158. Spotted by rovv. Fixes another case of bug 752.
30894 - Clients no longer cache certificates for authorities they do not
30895 recognize. Bugfix on 0.2.0.9-alpha.
30896 - When we can't transmit a DNS request due to a network error, retry
30897 it after a while, and eventually transmit a failing response to
30898 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
30899 - If the controller claimed responsibility for a stream, but that
30900 stream never finished making its connection, it would live
30901 forever in circuit_wait state. Now we close it after SocksTimeout
30902 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
30903 - Drop begin cells to a hidden service if they come from the middle
30904 of a circuit. Patch from lark.
30905 - When we erroneously receive two EXTEND cells for the same circuit
30906 ID on the same connection, drop the second. Patch from lark.
30907 - Fix a crash that occurs on exit nodes when a nameserver request
30908 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
30909 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
30911 - Do not assume that a stack-allocated character array will be
30912 64-bit aligned on platforms that demand that uint64_t access is
30913 aligned. Possible fix for bug 604.
30914 - Parse dates and IPv4 addresses in a locale- and libc-independent
30915 manner, to avoid platform-dependent behavior on malformed input.
30916 - Build correctly when configured to build outside the main source
30917 path. Patch from Michael Gold.
30918 - We were already rejecting relay begin cells with destination port
30919 of 0. Now also reject extend cells with destination port or address
30920 of 0. Suggested by lark.
30922 o Minor bugfixes (on 0.2.1.x):
30923 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
30924 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
30925 - If we're an exit node, scrub the IP address to which we are exiting
30926 in the logs. Bugfix on 0.2.1.8-alpha.
30929 - On Linux, use the prctl call to re-enable core dumps when the user
30931 - New controller event NEWCONSENSUS that lists the networkstatus
30932 lines for every recommended relay. Now controllers like Torflow
30933 can keep up-to-date on which relays they should be using.
30934 - Update to the "February 26 2009" ip-to-country file.
30937 Changes in version 0.2.0.34 - 2009-02-08
30938 Tor 0.2.0.34 features several more security-related fixes. You should
30939 upgrade, especially if you run an exit relay (remote crash) or a
30940 directory authority (remote infinite loop), or you're on an older
30941 (pre-XP) or not-recently-patched Windows (remote exploit).
30943 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
30944 have many known flaws, and nobody should be using them. You should
30945 upgrade. If you're using a Linux or BSD and its packages are obsolete,
30946 stop using those packages and upgrade anyway.
30949 - Fix an infinite-loop bug on handling corrupt votes under certain
30950 circumstances. Bugfix on 0.2.0.8-alpha.
30951 - Fix a temporary DoS vulnerability that could be performed by
30952 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
30953 - Avoid a potential crash on exit nodes when processing malformed
30954 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
30955 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30956 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30959 - Fix compilation on systems where time_t is a 64-bit integer.
30960 Patch from Matthias Drochner.
30961 - Don't consider expiring already-closed client connections. Fixes
30962 bug 893. Bugfix on 0.0.2pre20.
30965 Changes in version 0.2.1.12-alpha - 2009-02-08
30966 Tor 0.2.1.12-alpha features several more security-related fixes. You
30967 should upgrade, especially if you run an exit relay (remote crash) or
30968 a directory authority (remote infinite loop), or you're on an older
30969 (pre-XP) or not-recently-patched Windows (remote exploit). It also
30970 includes a big pile of minor bugfixes and cleanups.
30973 - Fix an infinite-loop bug on handling corrupt votes under certain
30974 circumstances. Bugfix on 0.2.0.8-alpha.
30975 - Fix a temporary DoS vulnerability that could be performed by
30976 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
30977 - Avoid a potential crash on exit nodes when processing malformed
30978 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
30981 - Let controllers actually ask for the "clients_seen" event for
30982 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
30983 reported by Matt Edman.
30984 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
30986 - Fix a bug in address parsing that was preventing bridges or hidden
30987 service targets from being at IPv6 addresses.
30988 - Solve a bug that kept hardware crypto acceleration from getting
30989 enabled when accounting was turned on. Fixes bug 907. Bugfix on
30991 - Remove a bash-ism from configure.in to build properly on non-Linux
30992 platforms. Bugfix on 0.2.1.1-alpha.
30993 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
30994 headers. Bugfix on 0.2.0.10-alpha.
30995 - Don't consider expiring already-closed client connections. Fixes
30996 bug 893. Bugfix on 0.0.2pre20.
30997 - Fix another interesting corner-case of bug 891 spotted by rovv:
30998 Previously, if two hosts had different amounts of clock drift, and
30999 one of them created a new connection with just the wrong timing,
31000 the other might decide to deprecate the new connection erroneously.
31001 Bugfix on 0.1.1.13-alpha.
31002 - Resolve a very rare crash bug that could occur when the user forced
31003 a nameserver reconfiguration during the middle of a nameserver
31004 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
31005 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
31006 Bugfix on 0.2.1.7-alpha.
31007 - If we're using bridges and our network goes away, be more willing
31008 to forgive our bridges and try again when we get an application
31009 request. Bugfix on 0.2.0.x.
31012 - Support platforms where time_t is 64 bits long. (Congratulations,
31013 NetBSD!) Patch from Matthias Drochner.
31014 - Add a 'getinfo status/clients-seen' controller command, in case
31015 controllers want to hear clients_seen events but connect late.
31018 - Disable GCC's strict alias optimization by default, to avoid the
31019 likelihood of its introducing subtle bugs whenever our code violates
31020 the letter of C99's alias rules.
31023 Changes in version 0.2.0.33 - 2009-01-21
31024 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
31025 useful to users. It also finally fixes a bug where a relay or client
31026 that's been off for many days would take a long time to bootstrap.
31028 This update also fixes an important security-related bug reported by
31029 Ilja van Sprundel. You should upgrade. (We'll send out more details
31030 about the bug once people have had some time to upgrade.)
31033 - Fix a heap-corruption bug that may be remotely triggerable on
31034 some platforms. Reported by Ilja van Sprundel.
31037 - When a stream at an exit relay is in state "resolving" or
31038 "connecting" and it receives an "end" relay cell, the exit relay
31039 would silently ignore the end cell and not close the stream. If
31040 the client never closes the circuit, then the exit relay never
31041 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
31042 reported by "wood".
31043 - When sending CREATED cells back for a given circuit, use a 64-bit
31044 connection ID to find the right connection, rather than an addr:port
31045 combination. Now that we can have multiple OR connections between
31046 the same ORs, it is no longer possible to use addr:port to uniquely
31047 identify a connection.
31048 - Bridge relays that had DirPort set to 0 would stop fetching
31049 descriptors shortly after startup, and then briefly resume
31050 after a new bandwidth test and/or after publishing a new bridge
31051 descriptor. Bridge users that try to bootstrap from them would
31052 get a recent networkstatus but would get descriptors from up to
31053 18 hours earlier, meaning most of the descriptors were obsolete
31054 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31055 - Prevent bridge relays from serving their 'extrainfo' document
31056 to anybody who asks, now that extrainfo docs include potentially
31057 sensitive aggregated client geoip summaries. Bugfix on
31059 - If the cached networkstatus consensus is more than five days old,
31060 discard it rather than trying to use it. In theory it could be
31061 useful because it lists alternate directory mirrors, but in practice
31062 it just means we spend many minutes trying directory mirrors that
31063 are long gone from the network. Also discard router descriptors as
31064 we load them if they are more than five days old, since the onion
31065 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
31068 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31069 could make gcc generate non-functional binary search code. Bugfix
31071 - Build correctly on platforms without socklen_t.
31072 - Compile without warnings on solaris.
31073 - Avoid potential crash on internal error during signature collection.
31074 Fixes bug 864. Patch from rovv.
31075 - Correct handling of possible malformed authority signing key
31076 certificates with internal signature types. Fixes bug 880.
31077 Bugfix on 0.2.0.3-alpha.
31078 - Fix a hard-to-trigger resource leak when logging credential status.
31080 - When we can't initialize DNS because the network is down, do not
31081 automatically stop Tor from starting. Instead, we retry failed
31082 dns_init() every 10 minutes, and change the exit policy to reject
31083 *:* until one succeeds. Fixes bug 691.
31084 - Use 64 bits instead of 32 bits for connection identifiers used with
31085 the controller protocol, to greatly reduce risk of identifier reuse.
31086 - When we're choosing an exit node for a circuit, and we have
31087 no pending streams, choose a good general exit rather than one that
31088 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31089 - Fix another case of assuming, when a specific exit is requested,
31090 that we know more than the user about what hosts it allows.
31091 Fixes one case of bug 752. Patch from rovv.
31092 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31093 seconds. Warn the user if lower values are given in the
31094 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31095 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31096 user if lower values are given in the configuration. Bugfix on
31097 0.1.1.17-rc. Patch by Sebastian.
31098 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
31099 the cache because we already had a v0 descriptor with the same ID.
31100 Bugfix on 0.2.0.18-alpha.
31101 - Fix a race condition when freeing keys shared between main thread
31102 and CPU workers that could result in a memory leak. Bugfix on
31103 0.1.0.1-rc. Fixes bug 889.
31104 - Send a valid END cell back when a client tries to connect to a
31105 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31106 840. Patch from rovv.
31107 - Check which hops rendezvous stream cells are associated with to
31108 prevent possible guess-the-streamid injection attacks from
31109 intermediate hops. Fixes another case of bug 446. Based on patch
31111 - If a broken client asks a non-exit router to connect somewhere,
31112 do not even do the DNS lookup before rejecting the connection.
31113 Fixes another case of bug 619. Patch from rovv.
31114 - When a relay gets a create cell it can't decrypt (e.g. because it's
31115 using the wrong onion key), we were dropping it and letting the
31116 client time out. Now actually answer with a destroy cell. Fixes
31117 bug 904. Bugfix on 0.0.2pre8.
31119 o Minor bugfixes (hidden services):
31120 - Do not throw away existing introduction points on SIGHUP. Bugfix on
31121 0.0.6pre1. Patch by Karsten. Fixes bug 874.
31124 - Report the case where all signatures in a detached set are rejected
31125 differently than the case where there is an error handling the
31127 - When we realize that another process has modified our cached
31128 descriptors, print out a more useful error message rather than
31129 triggering an assertion. Fixes bug 885. Patch from Karsten.
31130 - Implement the 0x20 hack to better resist DNS poisoning: set the
31131 case on outgoing DNS requests randomly, and reject responses that do
31132 not match the case correctly. This logic can be disabled with the
31133 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31134 of servers that do not reliably preserve case in replies. See
31135 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31137 - Check DNS replies for more matching fields to better resist DNS
31139 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31140 compress cells, which are basically all encrypted, compressed, or
31144 Changes in version 0.2.1.11-alpha - 2009-01-20
31145 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
31146 week it will take a long time to bootstrap again" bug. It also fixes
31147 an important security-related bug reported by Ilja van Sprundel. You
31148 should upgrade. (We'll send out more details about the bug once people
31149 have had some time to upgrade.)
31152 - Fix a heap-corruption bug that may be remotely triggerable on
31153 some platforms. Reported by Ilja van Sprundel.
31156 - Discard router descriptors as we load them if they are more than
31157 five days old. Otherwise if Tor is off for a long time and then
31158 starts with cached descriptors, it will try to use the onion
31159 keys in those obsolete descriptors when building circuits. Bugfix
31160 on 0.2.0.x. Fixes bug 887.
31163 - Try to make sure that the version of Libevent we're running with
31164 is binary-compatible with the one we built with. May address bug
31166 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
31167 for bug 905. Bugfix on 0.2.1.7-alpha.
31168 - Add a new --enable-local-appdata configuration switch to change
31169 the default location of the datadir on win32 from APPDATA to
31170 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
31171 entirely. Patch from coderman.
31174 - Make outbound DNS packets respect the OutboundBindAddress setting.
31175 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
31176 - When our circuit fails at the first hop (e.g. we get a destroy
31177 cell back), avoid using that OR connection anymore, and also
31178 tell all the one-hop directory requests waiting for it that they
31179 should fail. Bugfix on 0.2.1.3-alpha.
31180 - In the torify(1) manpage, mention that tsocks will leak your
31184 Changes in version 0.2.1.10-alpha - 2009-01-06
31185 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
31186 would make the bridge relay not so useful if it had DirPort set to 0,
31187 and one that could let an attacker learn a little bit of information
31188 about the bridge's users), and a bug that would cause your Tor relay
31189 to ignore a circuit create request it can't decrypt (rather than reply
31190 with an error). It also fixes a wide variety of other bugs.
31193 - If the cached networkstatus consensus is more than five days old,
31194 discard it rather than trying to use it. In theory it could
31195 be useful because it lists alternate directory mirrors, but in
31196 practice it just means we spend many minutes trying directory
31197 mirrors that are long gone from the network. Helps bug 887 a bit;
31199 - Bridge relays that had DirPort set to 0 would stop fetching
31200 descriptors shortly after startup, and then briefly resume
31201 after a new bandwidth test and/or after publishing a new bridge
31202 descriptor. Bridge users that try to bootstrap from them would
31203 get a recent networkstatus but would get descriptors from up to
31204 18 hours earlier, meaning most of the descriptors were obsolete
31205 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
31206 - Prevent bridge relays from serving their 'extrainfo' document
31207 to anybody who asks, now that extrainfo docs include potentially
31208 sensitive aggregated client geoip summaries. Bugfix on
31212 - New controller event "clients_seen" to report a geoip-based summary
31213 of which countries we've seen clients from recently. Now controllers
31214 like Vidalia can show bridge operators that they're actually making
31216 - Build correctly against versions of OpenSSL 0.9.8 or later built
31217 without support for deprecated functions.
31218 - Update to the "December 19 2008" ip-to-country file.
31220 o Minor bugfixes (on 0.2.0.x):
31221 - Authorities now vote for the Stable flag for any router whose
31222 weighted MTBF is at least 5 days, regardless of the mean MTBF.
31223 - Do not remove routers as too old if we do not have any consensus
31224 document. Bugfix on 0.2.0.7-alpha.
31225 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
31226 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
31227 - When an exit relay resolves a stream address to a local IP address,
31228 do not just keep retrying that same exit relay over and
31229 over. Instead, just close the stream. Addresses bug 872. Bugfix
31230 on 0.2.0.32. Patch from rovv.
31231 - If a hidden service sends us an END cell, do not consider
31232 retrying the connection; just close it. Patch from rovv.
31233 - When we made bridge authorities stop serving bridge descriptors over
31234 unencrypted links, we also broke DirPort reachability testing for
31235 bridges. So bridges with a non-zero DirPort were printing spurious
31236 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
31237 - When a relay gets a create cell it can't decrypt (e.g. because it's
31238 using the wrong onion key), we were dropping it and letting the
31239 client time out. Now actually answer with a destroy cell. Fixes
31240 bug 904. Bugfix on 0.0.2pre8.
31241 - Squeeze 2-5% out of client performance (according to oprofile) by
31242 improving the implementation of some policy-manipulation functions.
31244 o Minor bugfixes (on 0.2.1.x):
31245 - Make get_interface_address() function work properly again; stop
31246 guessing the wrong parts of our address as our address.
31247 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
31248 send on that circuit. Otherwise we might violate the proposal-110
31249 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
31251 - When we're sending non-EXTEND cells to the first hop in a circuit,
31252 for example to use an encrypted directory connection, we don't need
31253 to use RELAY_EARLY cells: the first hop knows what kind of cell
31254 it is, and nobody else can even see the cell type. Conserving
31255 RELAY_EARLY cells makes it easier to cannibalize circuits like
31257 - Stop logging nameserver addresses in reverse order.
31258 - If we are retrying a directory download slowly over and over, do
31259 not automatically give up after the 254th failure. Bugfix on
31261 - Resume reporting accurate "stream end" reasons to the local control
31262 port. They were lost in the changes for Proposal 148. Bugfix on
31265 o Deprecated and removed features:
31266 - The old "tor --version --version" command, which would print out
31267 the subversion "Id" of most of the source files, is now removed. It
31268 turned out to be less useful than we'd expected, and harder to
31271 o Code simplifications and refactoring:
31272 - Change our header file guard macros to be less likely to conflict
31273 with system headers. Adam Langley noticed that we were conflicting
31274 with log.h on Android.
31275 - Tool-assisted documentation cleanup. Nearly every function or
31276 static variable in Tor should have its own documentation now.
31279 Changes in version 0.2.1.9-alpha - 2008-12-25
31280 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
31282 o New directory authorities:
31283 - gabelmoo (the authority run by Karsten Loesing) now has a new
31287 - Never use a connection with a mismatched address to extend a
31288 circuit, unless that connection is canonical. A canonical
31289 connection is one whose address is authenticated by the router's
31290 identity key, either in a NETINFO cell or in a router descriptor.
31291 - Avoid a possible memory corruption bug when receiving hidden service
31292 descriptors. Bugfix on 0.2.1.6-alpha.
31295 - Fix a logic error that would automatically reject all but the first
31296 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
31297 part of bug 813/868. Bug spotted by coderman.
31298 - When a stream at an exit relay is in state "resolving" or
31299 "connecting" and it receives an "end" relay cell, the exit relay
31300 would silently ignore the end cell and not close the stream. If
31301 the client never closes the circuit, then the exit relay never
31302 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
31303 reported by "wood".
31304 - When we can't initialize DNS because the network is down, do not
31305 automatically stop Tor from starting. Instead, retry failed
31306 dns_init() every 10 minutes, and change the exit policy to reject
31307 *:* until one succeeds. Fixes bug 691.
31310 - Give a better error message when an overzealous init script says
31311 "sudo -u username tor --user username". Makes Bug 882 easier for
31313 - When a directory authority gives us a new guess for our IP address,
31314 log which authority we used. Hopefully this will help us debug
31315 the recent complaints about bad IP address guesses.
31316 - Detect svn revision properly when we're using git-svn.
31317 - Try not to open more than one descriptor-downloading connection
31318 to an authority at once. This should reduce load on directory
31319 authorities. Fixes bug 366.
31320 - Add cross-certification to newly generated certificates, so that
31321 a signing key is enough information to look up a certificate.
31322 Partial implementation of proposal 157.
31323 - Start serving certificates by <identity digest, signing key digest>
31324 pairs. Partial implementation of proposal 157.
31325 - Clients now never report any stream end reason except 'MISC'.
31326 Implements proposal 148.
31327 - On platforms with a maximum syslog string length, truncate syslog
31328 messages to that length ourselves, rather than relying on the
31329 system to do it for us.
31330 - Optimize out calls to time(NULL) that occur for every IO operation,
31331 or for every cell. On systems where time() is a slow syscall,
31332 this fix will be slightly helpful.
31333 - Exit servers can now answer resolve requests for ip6.arpa addresses.
31334 - When we download a descriptor that we then immediately (as
31335 a directory authority) reject, do not retry downloading it right
31336 away. Should save some bandwidth on authorities. Fix for bug
31337 888. Patch by Sebastian Hahn.
31338 - When a download gets us zero good descriptors, do not notify
31339 Tor that new directory information has arrived.
31340 - Avoid some nasty corner cases in the logic for marking connections
31341 as too old or obsolete or noncanonical for circuits. Partial
31344 o Minor features (controller):
31345 - New CONSENSUS_ARRIVED event to note when a new consensus has
31346 been fetched and validated.
31347 - When we realize that another process has modified our cached
31348 descriptors file, print out a more useful error message rather
31349 than triggering an assertion. Fixes bug 885. Patch from Karsten.
31350 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
31351 controllers to prevent SIGHUP from reloading the
31352 configuration. Fixes bug 856.
31355 - Resume using the correct "REASON=" stream when telling the
31356 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
31357 - When a canonical connection appears later in our internal list
31358 than a noncanonical one for a given OR ID, always use the
31359 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
31361 - Clip the MaxCircuitDirtiness config option to a minimum of 10
31362 seconds. Warn the user if lower values are given in the
31363 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
31364 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
31365 user if lower values are given in the configuration. Bugfix on
31366 0.1.1.17-rc. Patch by Sebastian.
31367 - Fix a race condition when freeing keys shared between main thread
31368 and CPU workers that could result in a memory leak. Bugfix on
31369 0.1.0.1-rc. Fixes bug 889.
31371 o Minor bugfixes (hidden services):
31372 - Do not throw away existing introduction points on SIGHUP (bugfix on
31373 0.0.6pre1); also, do not stall hidden services because we're
31374 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
31375 by John Brooks. Patch by Karsten. Fixes bug 874.
31376 - Fix a memory leak when we decline to add a v2 rendezvous
31377 descriptor to the cache because we already had a v0 descriptor
31378 with the same ID. Bugfix on 0.2.0.18-alpha.
31380 o Deprecated and removed features:
31381 - RedirectExits has been removed. It was deprecated since
31383 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
31384 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
31385 - Cell pools are now always enabled; --disable-cell-pools is ignored.
31387 o Code simplifications and refactoring:
31388 - Rename the confusing or_is_obsolete field to the more appropriate
31389 is_bad_for_new_circs, and move it to or_connection_t where it
31391 - Move edge-only flags from connection_t to edge_connection_t: not
31392 only is this better coding, but on machines of plausible alignment,
31393 it should save 4-8 bytes per connection_t. "Every little bit helps."
31394 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
31395 for consistency; keep old option working for backward compatibility.
31396 - Simplify the code for finding connections to use for a circuit.
31399 Changes in version 0.2.1.8-alpha - 2008-12-08
31400 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
31401 builds better on unusual platforms like Solaris and old OS X, and
31402 fixes a variety of other issues.
31405 - New DirPortFrontPage option that takes an html file and publishes
31406 it as "/" on the DirPort. Now relay operators can provide a
31407 disclaimer without needing to set up a separate webserver. There's
31408 a sample disclaimer in contrib/tor-exit-notice.html.
31411 - When the client is choosing entry guards, now it selects at most
31412 one guard from a given relay family. Otherwise we could end up with
31413 all of our entry points into the network run by the same operator.
31414 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
31417 - Fix a DOS opportunity during the voting signature collection process
31418 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31419 - Fix a possible segfault when establishing an exit connection. Bugfix
31423 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
31425 - Made Tor a little less aggressive about deleting expired
31426 certificates. Partial fix for bug 854.
31427 - Stop doing unaligned memory access that generated bus errors on
31428 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
31429 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
31430 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
31431 - Make USR2 log-level switch take effect immediately. Bugfix on
31433 - If one win32 nameserver fails to get added, continue adding the
31434 rest, and don't automatically fail.
31435 - Use fcntl() for locking when flock() is not available. Should fix
31436 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
31437 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
31438 could make gcc generate non-functional binary search code. Bugfix
31440 - Build correctly on platforms without socklen_t.
31441 - Avoid potential crash on internal error during signature collection.
31442 Fixes bug 864. Patch from rovv.
31443 - Do not use C's stdio library for writing to log files. This will
31444 improve logging performance by a minute amount, and will stop
31445 leaking fds when our disk is full. Fixes bug 861.
31446 - Stop erroneous use of O_APPEND in cases where we did not in fact
31447 want to re-seek to the end of a file before every last write().
31448 - Correct handling of possible malformed authority signing key
31449 certificates with internal signature types. Fixes bug 880. Bugfix
31451 - Fix a hard-to-trigger resource leak when logging credential status.
31455 - Directory mirrors no longer fetch the v1 directory or
31456 running-routers files. They are obsolete, and nobody asks for them
31457 anymore. This is the first step to making v1 authorities obsolete.
31459 o Minor features (controller):
31460 - Return circuit purposes in response to GETINFO circuit-status. Fixes
31464 Changes in version 0.2.0.32 - 2008-11-20
31465 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
31466 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31467 a smaller security flaw that might allow an attacker to access local
31468 services, further improves hidden service performance, and fixes a
31469 variety of other issues.
31472 - The "User" and "Group" config options did not clear the
31473 supplementary group entries for the Tor process. The "User" option
31474 is now more robust, and we now set the groups to the specified
31475 user's primary group. The "Group" option is now ignored. For more
31476 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31477 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31478 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
31479 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31480 consistently obeyed: if an exit relay refuses a stream because its
31481 exit policy doesn't allow it, we would remember what IP address
31482 the relay said the destination address resolves to, even if it's
31483 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31486 - Fix a DOS opportunity during the voting signature collection process
31487 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
31489 o Major bugfixes (hidden services):
31490 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31491 we were failing the whole hidden service request when the v0
31492 descriptor fetch fails, even if the v2 fetch is still pending and
31493 might succeed. Similarly, if the last v2 fetch fails, we were
31494 failing the whole hidden service request even if a v0 fetch is
31495 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31496 - When extending a circuit to a hidden service directory to upload a
31497 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31498 requests failed, because the router descriptor has not been
31499 downloaded yet. In these cases, do not attempt to upload the
31500 rendezvous descriptor, but wait until the router descriptor is
31501 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
31502 descriptor from a hidden service directory for which the router
31503 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
31507 - Fix several infrequent memory leaks spotted by Coverity.
31508 - When testing for libevent functions, set the LDFLAGS variable
31509 correctly. Found by Riastradh.
31510 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
31511 bootstrapping with tunneled directory connections. Bugfix on
31512 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
31513 - When asked to connect to A.B.exit:80, if we don't know the IP for A
31514 and we know that server B rejects most-but-not all connections to
31515 port 80, we would previously reject the connection. Now, we assume
31516 the user knows what they were asking for. Fixes bug 752. Bugfix
31517 on 0.0.9rc5. Diagnosed by BarkerJr.
31518 - If we overrun our per-second write limits a little, count this as
31519 having used up our write allocation for the second, and choke
31520 outgoing directory writes. Previously, we had only counted this when
31521 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
31522 Bugfix on 0.2.0.x (??).
31523 - Remove the old v2 directory authority 'lefkada' from the default
31524 list. It has been gone for many months.
31525 - Stop doing unaligned memory access that generated bus errors on
31526 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
31527 - Make USR2 log-level switch take effect immediately. Bugfix on
31530 o Minor bugfixes (controller):
31531 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
31532 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
31535 Changes in version 0.2.1.7-alpha - 2008-11-08
31536 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
31537 packages (and maybe other packages) noticed by Theo de Raadt, fixes
31538 a smaller security flaw that might allow an attacker to access local
31539 services, adds better defense against DNS poisoning attacks on exit
31540 relays, further improves hidden service performance, and fixes a
31541 variety of other issues.
31544 - The "ClientDNSRejectInternalAddresses" config option wasn't being
31545 consistently obeyed: if an exit relay refuses a stream because its
31546 exit policy doesn't allow it, we would remember what IP address
31547 the relay said the destination address resolves to, even if it's
31548 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
31549 - The "User" and "Group" config options did not clear the
31550 supplementary group entries for the Tor process. The "User" option
31551 is now more robust, and we now set the groups to the specified
31552 user's primary group. The "Group" option is now ignored. For more
31553 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
31554 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
31555 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
31556 - Do not use or believe expired v3 authority certificates. Patch
31557 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
31560 - Now NodeFamily and MyFamily config options allow spaces in
31561 identity fingerprints, so it's easier to paste them in.
31562 Suggested by Lucky Green.
31563 - Implement the 0x20 hack to better resist DNS poisoning: set the
31564 case on outgoing DNS requests randomly, and reject responses that do
31565 not match the case correctly. This logic can be disabled with the
31566 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
31567 of servers that do not reliably preserve case in replies. See
31568 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
31570 - Preserve case in replies to DNSPort requests in order to support
31571 the 0x20 hack for resisting DNS poisoning attacks.
31573 o Hidden service performance improvements:
31574 - When the client launches an introduction circuit, retry with a
31575 new circuit after 30 seconds rather than 60 seconds.
31576 - Launch a second client-side introduction circuit in parallel
31577 after a delay of 15 seconds (based on work by Christian Wilms).
31578 - Hidden services start out building five intro circuits rather
31579 than three, and when the first three finish they publish a service
31580 descriptor using those. Now we publish our service descriptor much
31581 faster after restart.
31584 - Minor fix in the warning messages when you're having problems
31585 bootstrapping; also, be more forgiving of bootstrap problems when
31586 we're still making incremental progress on a given bootstrap phase.
31587 - When we're choosing an exit node for a circuit, and we have
31588 no pending streams, choose a good general exit rather than one that
31589 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
31590 - Send a valid END cell back when a client tries to connect to a
31591 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
31592 840. Patch from rovv.
31593 - If a broken client asks a non-exit router to connect somewhere,
31594 do not even do the DNS lookup before rejecting the connection.
31595 Fixes another case of bug 619. Patch from rovv.
31596 - Fix another case of assuming, when a specific exit is requested,
31597 that we know more than the user about what hosts it allows.
31598 Fixes another case of bug 752. Patch from rovv.
31599 - Check which hops rendezvous stream cells are associated with to
31600 prevent possible guess-the-streamid injection attacks from
31601 intermediate hops. Fixes another case of bug 446. Based on patch
31603 - Avoid using a negative right-shift when comparing 32-bit
31604 addresses. Possible fix for bug 845 and bug 811.
31605 - Make the assert_circuit_ok() function work correctly on circuits that
31606 have already been marked for close.
31607 - Fix read-off-the-end-of-string error in unit tests when decoding
31608 introduction points.
31609 - Fix uninitialized size field for memory area allocation: may improve
31610 memory performance during directory parsing.
31611 - Treat duplicate certificate fetches as failures, so that we do
31612 not try to re-fetch an expired certificate over and over and over.
31613 - Do not say we're fetching a certificate when we'll in fact skip it
31614 because of a pending download.
31617 Changes in version 0.2.1.6-alpha - 2008-09-30
31618 Tor 0.2.1.6-alpha further improves performance and robustness of
31619 hidden services, starts work on supporting per-country relay selection,
31620 and fixes a variety of smaller issues.
31623 - Implement proposal 121: make it possible to build hidden services
31624 that only certain clients are allowed to connect to. This is
31625 enforced at several points, so that unauthorized clients are unable
31626 to send INTRODUCE cells to the service, or even (depending on the
31627 type of authentication) to learn introduction points. This feature
31628 raises the bar for certain kinds of active attacks against hidden
31629 services. Code by Karsten Loesing.
31630 - Relays now store and serve v2 hidden service descriptors by default,
31631 i.e., the new default value for HidServDirectoryV2 is 1. This is
31632 the last step in proposal 114, which aims to make hidden service
31633 lookups more reliable.
31634 - Start work to allow node restrictions to include country codes. The
31635 syntax to exclude nodes in a country with country code XX is
31636 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
31637 refinement to decide what config options should take priority if
31638 you ask to both use a particular node and exclude it.
31639 - Allow ExitNodes list to include IP ranges and country codes, just
31640 like the Exclude*Nodes lists. Patch from Robert Hogan.
31643 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
31644 Tor to fail to start if you had it configured to use a bridge
31645 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
31646 - When extending a circuit to a hidden service directory to upload a
31647 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
31648 requests failed, because the router descriptor had not been
31649 downloaded yet. In these cases, we now wait until the router
31650 descriptor is downloaded, and then retry. Likewise, clients
31651 now skip over a hidden service directory if they don't yet have
31652 its router descriptor, rather than futilely requesting it and
31653 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
31655 - When fetching v0 and v2 rendezvous service descriptors in parallel,
31656 we were failing the whole hidden service request when the v0
31657 descriptor fetch fails, even if the v2 fetch is still pending and
31658 might succeed. Similarly, if the last v2 fetch fails, we were
31659 failing the whole hidden service request even if a v0 fetch is
31660 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
31661 - DNS replies need to have names matching their requests, but
31662 these names should be in the questions section, not necessarily
31663 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
31666 - Update to the "September 1 2008" ip-to-country file.
31667 - Allow ports 465 and 587 in the default exit policy again. We had
31668 rejected them in 0.1.0.15, because back in 2005 they were commonly
31669 misconfigured and ended up as spam targets. We hear they are better
31670 locked down these days.
31671 - Use a lockfile to make sure that two Tor processes are not
31672 simultaneously running with the same datadir.
31673 - Serve the latest v3 networkstatus consensus via the control
31674 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
31675 - Better logging about stability/reliability calculations on directory
31677 - Drop the requirement to have an open dir port for storing and
31678 serving v2 hidden service descriptors.
31679 - Directory authorities now serve a /tor/dbg-stability.txt URL to
31680 help debug WFU and MTBF calculations.
31681 - Implement most of Proposal 152: allow specialized servers to permit
31682 single-hop circuits, and clients to use those servers to build
31683 single-hop circuits when using a specialized controller. Patch
31684 from Josh Albrecht. Resolves feature request 768.
31685 - Add a -p option to tor-resolve for specifying the SOCKS port: some
31686 people find host:port too confusing.
31687 - Make TrackHostExit mappings expire a while after their last use, not
31688 after their creation. Patch from Robert Hogan.
31689 - Provide circuit purposes along with circuit events to the controller.
31692 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
31694 - Fixed some memory leaks -- some quite frequent, some almost
31695 impossible to trigger -- based on results from Coverity.
31696 - When testing for libevent functions, set the LDFLAGS variable
31697 correctly. Found by Riastradh.
31698 - Fix an assertion bug in parsing policy-related options; possible fix
31700 - Catch and report a few more bootstrapping failure cases when Tor
31701 fails to establish a TCP connection. Cleanup on 0.2.1.x.
31702 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
31703 bootstrapping with tunneled directory connections. Bugfix on
31704 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
31705 - When asked to connect to A.B.exit:80, if we don't know the IP for A
31706 and we know that server B rejects most-but-not all connections to
31707 port 80, we would previously reject the connection. Now, we assume
31708 the user knows what they were asking for. Fixes bug 752. Bugfix
31709 on 0.0.9rc5. Diagnosed by BarkerJr.
31710 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
31711 service directories if they have no advertised dir port. Bugfix
31713 - If we overrun our per-second write limits a little, count this as
31714 having used up our write allocation for the second, and choke
31715 outgoing directory writes. Previously, we had only counted this when
31716 we had met our limits precisely. Fixes bug 824. Patch by rovv.
31717 Bugfix on 0.2.0.x (??).
31718 - Avoid a "0 divided by 0" calculation when calculating router uptime
31719 at directory authorities. Bugfix on 0.2.0.8-alpha.
31720 - Make DNS resolved controller events into "CLOSED", not
31721 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
31723 - Fix a bug where an unreachable relay would establish enough
31724 reachability testing circuits to do a bandwidth test -- if
31725 we already have a connection to the middle hop of the testing
31726 circuit, then it could establish the last hop by using the existing
31727 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
31728 circuits no longer use entry guards in 0.2.1.3-alpha.
31729 - If we have correct permissions on $datadir, we complain to stdout
31730 and fail to start. But dangerous permissions on
31731 $datadir/cached-status/ would cause us to open a log and complain
31732 there. Now complain to stdout and fail to start in both cases. Fixes
31733 bug 820, reported by seeess.
31734 - Remove the old v2 directory authority 'lefkada' from the default
31735 list. It has been gone for many months.
31737 o Code simplifications and refactoring:
31738 - Revise the connection_new functions so that a more typesafe variant
31739 exists. This will work better with Coverity, and let us find any
31740 actual mistakes we're making here.
31741 - Refactor unit testing logic so that dmalloc can be used sensibly
31742 with unit tests to check for memory leaks.
31743 - Move all hidden-service related fields from connection and circuit
31744 structure to substructures: this way they won't eat so much memory.
31747 Changes in version 0.2.0.31 - 2008-09-03
31748 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
31749 a big bug we're seeing where in rare cases traffic from one Tor stream
31750 gets mixed into another stream, and fixes a variety of smaller issues.
31753 - Make sure that two circuits can never exist on the same connection
31754 with the same circuit ID, even if one is marked for close. This
31755 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
31756 - Relays now reject risky extend cells: if the extend cell includes
31757 a digest of all zeroes, or asks to extend back to the relay that
31758 sent the extend cell, tear down the circuit. Ideas suggested
31760 - If not enough of our entry guards are available so we add a new
31761 one, we might use the new one even if it overlapped with the
31762 current circuit's exit relay (or its family). Anonymity bugfix
31763 pointed out by rovv.
31766 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
31767 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
31768 - Correctly detect the presence of the linux/netfilter_ipv4.h header
31769 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
31770 - Pick size of default geoip filename string correctly on windows.
31771 Fixes bug 806. Bugfix on 0.2.0.30.
31772 - Make the autoconf script accept the obsolete --with-ssl-dir
31773 option as an alias for the actually-working --with-openssl-dir
31774 option. Fix the help documentation to recommend --with-openssl-dir.
31775 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
31776 - When using the TransPort option on OpenBSD, and using the User
31777 option to change UID and drop privileges, make sure to open
31778 /dev/pf before dropping privileges. Fixes bug 782. Patch from
31779 Christopher Davis. Bugfix on 0.1.2.1-alpha.
31780 - Try to attach connections immediately upon receiving a RENDEZVOUS2
31781 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
31782 on the client side when connecting to a hidden service. Bugfix
31783 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
31784 - When closing an application-side connection because its circuit is
31785 getting torn down, generate the stream event correctly. Bugfix on
31786 0.1.2.x. Anonymous patch.
31789 Changes in version 0.2.1.5-alpha - 2008-08-31
31790 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
31791 in a lot of the infrastructure for adding authorization to hidden
31792 services, lays the groundwork for having clients read their load
31793 balancing information out of the networkstatus consensus rather than
31794 the individual router descriptors, addresses two potential anonymity
31795 issues, and fixes a variety of smaller issues.
31798 - Convert many internal address representations to optionally hold
31800 - Generate and accept IPv6 addresses in many protocol elements.
31801 - Make resolver code handle nameservers located at ipv6 addresses.
31802 - Begin implementation of proposal 121 ("Client authorization for
31803 hidden services"): configure hidden services with client
31804 authorization, publish descriptors for them, and configure
31805 authorization data for hidden services at clients. The next
31806 step is to actually access hidden services that perform client
31808 - More progress toward proposal 141: Network status consensus
31809 documents and votes now contain bandwidth information for each
31810 router and a summary of that router's exit policy. Eventually this
31811 will be used by clients so that they do not have to download every
31812 known descriptor before building circuits.
31814 o Major bugfixes (on 0.2.0.x and before):
31815 - When sending CREATED cells back for a given circuit, use a 64-bit
31816 connection ID to find the right connection, rather than an addr:port
31817 combination. Now that we can have multiple OR connections between
31818 the same ORs, it is no longer possible to use addr:port to uniquely
31819 identify a connection.
31820 - Relays now reject risky extend cells: if the extend cell includes
31821 a digest of all zeroes, or asks to extend back to the relay that
31822 sent the extend cell, tear down the circuit. Ideas suggested
31824 - If not enough of our entry guards are available so we add a new
31825 one, we might use the new one even if it overlapped with the
31826 current circuit's exit relay (or its family). Anonymity bugfix
31827 pointed out by rovv.
31830 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
31831 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
31832 - When using the TransPort option on OpenBSD, and using the User
31833 option to change UID and drop privileges, make sure to open /dev/pf
31834 before dropping privileges. Fixes bug 782. Patch from Christopher
31835 Davis. Bugfix on 0.1.2.1-alpha.
31836 - Correctly detect the presence of the linux/netfilter_ipv4.h header
31837 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
31838 - Add a missing safe_str() call for a debug log message.
31839 - Use 64 bits instead of 32 bits for connection identifiers used with
31840 the controller protocol, to greatly reduce risk of identifier reuse.
31841 - Make the autoconf script accept the obsolete --with-ssl-dir
31842 option as an alias for the actually-working --with-openssl-dir
31843 option. Fix the help documentation to recommend --with-openssl-dir.
31844 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
31847 - Rate-limit too-many-sockets messages: when they happen, they happen
31848 a lot. Resolves bug 748.
31849 - Resist DNS poisoning a little better by making sure that names in
31850 answer sections match.
31851 - Print the SOCKS5 error message string as well as the error code
31852 when a tor-resolve request fails. Patch from Jacob.
31855 Changes in version 0.2.1.4-alpha - 2008-08-04
31856 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
31859 - The address part of exit policies was not correctly written
31860 to router descriptors. This generated router descriptors that failed
31861 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
31863 - Tor triggered a false assert when extending a circuit to a relay
31864 but we already have a connection open to that relay. Noticed by
31865 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
31868 - Fix a hidden service logging bug: in some edge cases, the router
31869 descriptor of a previously picked introduction point becomes
31870 obsolete and we need to give up on it rather than continually
31871 complaining that it has become obsolete. Observed by xiando. Bugfix
31874 o Removed features:
31875 - Take out the TestVia config option, since it was a workaround for
31876 a bug that was fixed in Tor 0.1.1.21.
31879 Changes in version 0.2.1.3-alpha - 2008-08-03
31880 Tor 0.2.1.3-alpha implements most of the pieces to prevent
31881 infinite-length circuit attacks (see proposal 110); fixes a bug that
31882 might cause exit relays to corrupt streams they send back; allows
31883 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
31884 ExcludeExitNodes config options; and fixes a big pile of bugs.
31886 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
31887 - Send a bootstrap problem "warn" event on the first problem if the
31888 reason is NO_ROUTE (that is, our network is down).
31891 - Implement most of proposal 110: The first K cells to be sent
31892 along a circuit are marked as special "early" cells; only K "early"
31893 cells will be allowed. Once this code is universal, we can block
31894 certain kinds of DOS attack by requiring that EXTEND commands must
31895 be sent using an "early" cell.
31898 - Try to attach connections immediately upon receiving a RENDEZVOUS2
31899 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
31900 on the client side when connecting to a hidden service. Bugfix
31901 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
31902 - Ensure that two circuits can never exist on the same connection
31903 with the same circuit ID, even if one is marked for close. This
31904 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
31907 - When relays do their initial bandwidth measurement, don't limit
31908 to just our entry guards for the test circuits. Otherwise we tend
31909 to have multiple test circuits going through a single entry guard,
31910 which makes our bandwidth test less accurate. Fixes part of bug 654;
31911 patch contributed by Josh Albrecht.
31912 - Add an ExcludeExitNodes option so users can list a set of nodes
31913 that should be be excluded from the exit node position, but
31914 allowed elsewhere. Implements proposal 151.
31915 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
31916 ExcludeNodes and ExcludeExitNodes lists.
31917 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
31918 be more efficient. Formerly it was quadratic in the number of
31919 servers; now it should be linear. Fixes bug 509.
31920 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
31921 and n_conn_id_digest fields into a separate structure that's
31922 only needed when the circuit has not yet attached to an n_conn.
31925 - Change the contrib/tor.logrotate script so it makes the new
31926 logs as "_tor:_tor" rather than the default, which is generally
31927 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
31928 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
31929 warnings (occasionally), but it can also cause the compiler to
31930 eliminate error-checking code. Suggested by Peter Gutmann.
31931 - When a hidden service is giving up on an introduction point candidate
31932 that was not included in the last published rendezvous descriptor,
31933 don't reschedule publication of the next descriptor. Fixes bug 763.
31935 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
31936 HiddenServiceExcludeNodes as obsolete: they never worked properly,
31937 and nobody claims to be using them. Fixes bug 754. Bugfix on
31938 0.1.0.1-rc. Patch from Christian Wilms.
31939 - Fix a small alignment and memory-wasting bug on buffer chunks.
31942 o Minor bugfixes (controller):
31943 - When closing an application-side connection because its circuit
31944 is getting torn down, generate the stream event correctly.
31945 Bugfix on 0.1.2.x. Anonymous patch.
31947 o Removed features:
31948 - Remove all backward-compatibility code to support relays running
31949 versions of Tor so old that they no longer work at all on the
31953 Changes in version 0.2.0.30 - 2008-07-15
31955 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
31956 warnings (occasionally), but it can also cause the compiler to
31957 eliminate error-checking code. Suggested by Peter Gutmann.
31960 Changes in version 0.2.0.29-rc - 2008-07-08
31961 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
31962 hidden-service performance bugs, and fixes a bunch of smaller bugs.
31965 - If you have more than one bridge but don't know their keys,
31966 you would only launch a request for the descriptor of the first one
31967 on your list. (Tor considered launching requests for the others, but
31968 found that it already had a connection on the way for $0000...0000
31969 so it didn't open another.) Bugfix on 0.2.0.x.
31970 - If you have more than one bridge but don't know their keys, and the
31971 connection to one of the bridges failed, you would cancel all
31972 pending bridge connections. (After all, they all have the same
31973 digest.) Bugfix on 0.2.0.x.
31974 - When a hidden service was trying to establish an introduction point,
31975 and Tor had built circuits preemptively for such purposes, we
31976 were ignoring all the preemptive circuits and launching a new one
31977 instead. Bugfix on 0.2.0.14-alpha.
31978 - When a hidden service was trying to establish an introduction point,
31979 and Tor *did* manage to reuse one of the preemptively built
31980 circuits, it didn't correctly remember which one it used,
31981 so it asked for another one soon after, until there were no
31982 more preemptive circuits, at which point it launched one from
31983 scratch. Bugfix on 0.0.9.x.
31984 - Make directory servers include the X-Your-Address-Is: http header in
31985 their responses even for begin_dir conns. Now clients who only
31986 ever use begin_dir connections still have a way to learn their IP
31987 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
31990 - Fix a macro/CPP interaction that was confusing some compilers:
31991 some GCCs don't like #if/#endif pairs inside macro arguments.
31993 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
31994 Fixes bug 704; fix from Steven Murdoch.
31995 - When opening /dev/null in finish_daemonize(), do not pass the
31996 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
31997 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
31998 - Correctly detect transparent proxy support on Linux hosts that
31999 require in.h to be included before netfilter_ipv4.h. Patch
32001 - Disallow session resumption attempts during the renegotiation
32002 stage of the v2 handshake protocol. Clients should never be trying
32003 session resumption at this point, but apparently some did, in
32004 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
32005 found by Geoff Goodell.
32008 Changes in version 0.2.1.2-alpha - 2008-06-20
32009 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
32010 make it easier to set up your own private Tor network; fixes several
32011 big bugs with using more than one bridge relay; fixes a big bug with
32012 offering hidden services quickly after Tor starts; and uses a better
32013 API for reporting potential bootstrapping problems to the controller.
32016 - New TestingTorNetwork config option to allow adjustment of
32017 previously constant values that, while reasonable, could slow
32018 bootstrapping. Implements proposal 135. Patch from Karsten.
32021 - If you have more than one bridge but don't know their digests,
32022 you would only learn a request for the descriptor of the first one
32023 on your list. (Tor considered launching requests for the others, but
32024 found that it already had a connection on the way for $0000...0000
32025 so it didn't open another.) Bugfix on 0.2.0.x.
32026 - If you have more than one bridge but don't know their digests,
32027 and the connection to one of the bridges failed, you would cancel
32028 all pending bridge connections. (After all, they all have the
32029 same digest.) Bugfix on 0.2.0.x.
32030 - When establishing a hidden service, introduction points that
32031 originate from cannibalized circuits are completely ignored and not
32032 included in rendezvous service descriptors. This might be another
32033 reason for delay in making a hidden service available. Bugfix
32034 from long ago (0.0.9.x?)
32037 - Allow OpenSSL to use dynamic locks if it wants.
32038 - When building a consensus, do not include routers that are down.
32039 This will cut down 30% to 40% on consensus size. Implements
32041 - In directory authorities' approved-routers files, allow
32042 fingerprints with or without space.
32043 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
32044 controller can query our current bootstrap state in case it attaches
32045 partway through and wants to catch up.
32046 - Send an initial "Starting" bootstrap status event, so we have a
32047 state to start out in.
32050 - Asking for a conditional consensus at .../consensus/<fingerprints>
32051 would crash a dirserver if it did not already have a
32052 consensus. Bugfix on 0.2.1.1-alpha.
32053 - Clean up some macro/CPP interactions: some GCC versions don't like
32054 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
32057 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
32058 - Directory authorities shouldn't complain about bootstrapping
32059 problems just because they do a lot of reachability testing and
32060 some of the connection attempts fail.
32061 - Start sending "count" and "recommendation" key/value pairs in
32062 bootstrap problem status events, so the controller can hear about
32063 problems even before Tor decides they're worth reporting for sure.
32064 - If you're using bridges, generate "bootstrap problem" warnings
32065 as soon as you run out of working bridges, rather than waiting
32066 for ten failures -- which will never happen if you have less than
32068 - If we close our OR connection because there's been a circuit
32069 pending on it for too long, we were telling our bootstrap status
32070 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
32073 Changes in version 0.2.1.1-alpha - 2008-06-13
32074 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
32075 were making the Tor process bloat especially on Linux; makes our TLS
32076 handshake blend in better; sends "bootstrap phase" status events to
32077 the controller, so it can keep the user informed of progress (and
32078 problems) fetching directory information and establishing circuits;
32079 and adds a variety of smaller features.
32082 - More work on making our TLS handshake blend in: modify the list
32083 of ciphers advertised by OpenSSL in client mode to even more
32084 closely resemble a common web browser. We cheat a little so that
32085 we can advertise ciphers that the locally installed OpenSSL doesn't
32087 - Start sending "bootstrap phase" status events to the controller,
32088 so it can keep the user informed of progress fetching directory
32089 information and establishing circuits. Also inform the controller
32090 if we think we're stuck at a particular bootstrap phase. Implements
32092 - Resume using OpenSSL's RAND_poll() for better (and more portable)
32093 cross-platform entropy collection again. We used to use it, then
32094 stopped using it because of a bug that could crash systems that
32095 called RAND_poll when they had a lot of fds open. It looks like the
32096 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
32097 at startup, and to call RAND_poll() when we reseed later only if
32098 we have a non-buggy OpenSSL version.
32101 - When we choose to abandon a new entry guard because we think our
32102 older ones might be better, close any circuits pending on that
32103 new entry guard connection. This fix should make us recover much
32104 faster when our network is down and then comes back. Bugfix on
32105 0.1.2.8-beta; found by lodger.
32107 o Memory fixes and improvements:
32108 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
32109 to avoid unused RAM in buffer chunks and memory pools.
32110 - Speed up parsing and cut down on memory fragmentation by using
32111 stack-style allocations for parsing directory objects. Previously,
32112 this accounted for over 40% of allocations from within Tor's code
32113 on a typical directory cache.
32114 - Use a Bloom filter rather than a digest-based set to track which
32115 descriptors we need to keep around when we're cleaning out old
32116 router descriptors. This speeds up the computation significantly,
32117 and may reduce fragmentation.
32118 - Reduce the default smartlist size from 32 to 16; it turns out that
32119 most smartlists hold around 8-12 elements tops.
32120 - Make dumpstats() log the fullness and size of openssl-internal
32122 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
32123 patch to their OpenSSL, turn it on to save memory on servers. This
32124 patch will (with any luck) get included in a mainline distribution
32126 - Never use OpenSSL compression: it wastes RAM and CPU trying to
32127 compress cells, which are basically all encrypted, compressed,
32131 - Stop reloading the router list from disk for no reason when we
32132 run out of reachable directory mirrors. Once upon a time reloading
32133 it would set the 'is_running' flag back to 1 for them. It hasn't
32134 done that for a long time.
32135 - In very rare situations new hidden service descriptors were
32136 published earlier than 30 seconds after the last change to the
32137 service. (We currently think that a hidden service descriptor
32138 that's been stable for 30 seconds is worth publishing.)
32141 - Allow separate log levels to be configured for different logging
32142 domains. For example, this allows one to log all notices, warnings,
32143 or errors, plus all memory management messages of level debug or
32144 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
32145 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
32146 and stop using a warning that had become unfixably verbose under
32148 - New --hush command-line option similar to --quiet. While --quiet
32149 disables all logging to the console on startup, --hush limits the
32150 output to messages of warning and error severity.
32151 - Servers support a new URL scheme for consensus downloads that
32152 allows the client to specify which authorities are trusted.
32153 The server then only sends the consensus if the client will trust
32154 it. Otherwise a 404 error is sent back. Clients use this
32155 new scheme when the server supports it (meaning it's running
32156 0.2.1.1-alpha or later). Implements proposal 134.
32157 - New configure/torrc options (--enable-geoip-stats,
32158 DirRecordUsageByCountry) to record how many IPs we've served
32159 directory info to in each country code, how many status documents
32160 total we've sent to each country code, and what share of the total
32161 directory requests we should expect to see.
32162 - Use the TLS1 hostname extension to more closely resemble browser
32164 - Lots of new unit tests.
32165 - Add a macro to implement the common pattern of iterating through
32166 two parallel lists in lockstep.
32169 Changes in version 0.2.0.28-rc - 2008-06-13
32170 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
32171 performance bug, and fixes a bunch of smaller bugs.
32174 - Fix a bug where, when we were choosing the 'end stream reason' to
32175 put in our relay end cell that we send to the exit relay, Tor
32176 clients on Windows were sometimes sending the wrong 'reason'. The
32177 anonymity problem is that exit relays may be able to guess whether
32178 the client is running Windows, thus helping partition the anonymity
32179 set. Down the road we should stop sending reasons to exit relays,
32180 or otherwise prevent future versions of this bug.
32183 - While setting up a hidden service, some valid introduction circuits
32184 were overlooked and abandoned. This might be the reason for
32185 the long delay in making a hidden service available. Bugfix on
32189 - Update to the "June 9 2008" ip-to-country file.
32190 - Run 'make test' as part of 'make dist', so we stop releasing so
32191 many development snapshots that fail their unit tests.
32194 - When we're checking if we have enough dir info for each relay
32195 to begin establishing circuits, make sure that we actually have
32196 the descriptor listed in the consensus, not just any descriptor.
32198 - Bridge relays no longer print "xx=0" in their extrainfo document
32199 for every single country code in the geoip db. Bugfix on
32201 - Only warn when we fail to load the geoip file if we were planning to
32202 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
32203 - If we change our MaxAdvertisedBandwidth and then reload torrc,
32204 Tor won't realize it should publish a new relay descriptor. Fixes
32205 bug 688, reported by mfr. Bugfix on 0.1.2.x.
32206 - When we haven't had any application requests lately, don't bother
32207 logging that we have expired a bunch of descriptors. Bugfix
32209 - Make relay cells written on a connection count as non-padding when
32210 tracking how long a connection has been in use. Bugfix on
32211 0.2.0.1-alpha. Spotted by lodger.
32212 - Fix unit tests in 0.2.0.27-rc.
32213 - Fix compile on Windows.
32216 Changes in version 0.2.0.27-rc - 2008-06-03
32217 Tor 0.2.0.27-rc adds a few features we left out of the earlier
32218 release candidates. In particular, we now include an IP-to-country
32219 GeoIP database, so controllers can easily look up what country a
32220 given relay is in, and so bridge relays can give us some sanitized
32221 summaries about which countries are making use of bridges. (See proposal
32222 126-geoip-fetching.txt for details.)
32225 - Include an IP-to-country GeoIP file in the tarball, so bridge
32226 relays can report sanitized summaries of the usage they're seeing.
32229 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
32230 Robert Hogan. Fixes the first part of bug 681.
32231 - Make bridge authorities never serve extrainfo docs.
32232 - Add support to detect Libevent versions in the 1.4.x series
32234 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
32235 - Include a new contrib/tor-exit-notice.html file that exit relay
32236 operators can put on their website to help reduce abuse queries.
32239 - When tunneling an encrypted directory connection, and its first
32240 circuit fails, do not leave it unattached and ask the controller
32241 to deal. Fixes the second part of bug 681.
32242 - Make bridge authorities correctly expire old extrainfo documents
32246 Changes in version 0.2.0.26-rc - 2008-05-13
32247 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
32248 in Debian's OpenSSL packages. All users running any 0.2.0.x version
32249 should upgrade, whether they're running Debian or not.
32251 o Major security fixes:
32252 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32253 moria1 V3 directory authorities. The old keys were generated with
32254 a vulnerable version of Debian's OpenSSL package, and must be
32255 considered compromised. Other authorities' keys were not generated
32256 with an affected version of OpenSSL.
32259 - List authority signatures as "unrecognized" based on DirServer
32260 lines, not on cert cache. Bugfix on 0.2.0.x.
32263 - Add a new V3AuthUseLegacyKey option to make it easier for
32264 authorities to change their identity keys if they have to.
32267 Changes in version 0.2.0.25-rc - 2008-04-23
32268 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
32271 - Remember to initialize threading before initializing logging.
32272 Otherwise, many BSD-family implementations will crash hard on
32273 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
32276 - Authorities correctly free policies on bad servers on
32277 exit. Fixes bug 672. Bugfix on 0.2.0.x.
32280 Changes in version 0.2.0.24-rc - 2008-04-22
32281 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
32282 v3 directory authority, makes relays with dynamic IP addresses and no
32283 DirPort notice more quickly when their IP address changes, fixes a few
32284 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
32286 o New directory authorities:
32287 - Take lefkada out of the list of v3 directory authorities, since
32288 it has been down for months.
32289 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
32293 - Detect address changes more quickly on non-directory mirror
32294 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
32296 o Minor features (security):
32297 - Reject requests for reverse-dns lookup of names that are in
32298 a private address space. Patch from lodger.
32299 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
32302 o Minor bugfixes (crashes):
32303 - Avoid a rare assert that can trigger when Tor doesn't have much
32304 directory information yet and it tries to fetch a v2 hidden
32305 service descriptor. Fixes bug 651, reported by nwf.
32306 - Initialize log mutex before initializing dmalloc. Otherwise,
32307 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
32308 - Use recursive pthread mutexes in order to avoid deadlock when
32309 logging debug-level messages to a controller. Bug spotted by nwf,
32310 bugfix on 0.2.0.16-alpha.
32312 o Minor bugfixes (resource management):
32313 - Keep address policies from leaking memory: start their refcount
32314 at 1, not 2. Bugfix on 0.2.0.16-alpha.
32315 - Free authority certificates on exit, so they don't look like memory
32316 leaks. Bugfix on 0.2.0.19-alpha.
32317 - Free static hashtables for policy maps and for TLS connections on
32318 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
32319 - Avoid allocating extra space when computing consensuses on 64-bit
32320 platforms. Bug spotted by aakova.
32322 o Minor bugfixes (misc):
32323 - Do not read the configuration file when we've only been told to
32324 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
32325 based on patch from Sebastian Hahn.
32326 - Exit relays that are used as a client can now reach themselves
32327 using the .exit notation, rather than just launching an infinite
32328 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
32329 - When attempting to open a logfile fails, tell us why.
32330 - Fix a dumb bug that was preventing us from knowing that we should
32331 preemptively build circuits to handle expected directory requests.
32332 Fixes bug 660. Bugfix on 0.1.2.x.
32333 - Warn less verbosely about clock skew from netinfo cells from
32334 untrusted sources. Fixes bug 663.
32335 - Make controller stream events for DNS requests more consistent,
32336 by adding "new stream" events for DNS requests, and removing
32337 spurious "stream closed" events" for cached reverse resolves.
32338 Patch from mwenge. Fixes bug 646.
32339 - Correctly notify one-hop connections when a circuit build has
32340 failed. Possible fix for bug 669. Found by lodger.
32343 Changes in version 0.2.0.23-rc - 2008-03-24
32344 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
32345 makes bootstrapping faster if the first directory mirror you contact
32346 is down. The bundles also include the new Vidalia 0.1.2 release.
32349 - When a tunneled directory request is made to a directory server
32350 that's down, notice after 30 seconds rather than 120 seconds. Also,
32351 fail any begindir streams that are pending on it, so they can
32352 retry elsewhere. This was causing multi-minute delays on bootstrap.
32355 Changes in version 0.2.0.22-rc - 2008-03-18
32356 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
32357 enables encrypted directory connections by default for non-relays, fixes
32358 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
32359 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
32362 - Enable encrypted directory connections by default for non-relays,
32363 so censor tools that block Tor directory connections based on their
32364 plaintext patterns will no longer work. This means Tor works in
32365 certain censored countries by default again.
32368 - Make sure servers always request certificates from clients during
32369 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
32370 - Do not enter a CPU-eating loop when a connection is closed in
32371 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
32372 diagnosed by lodger; bugfix on 0.2.0.20-rc.
32373 - Fix assertion failure that could occur when a blocked circuit
32374 became unblocked, and it had pending client DNS requests. Bugfix
32375 on 0.2.0.1-alpha. Fixes bug 632.
32377 o Minor bugfixes (on 0.1.2.x):
32378 - Generate "STATUS_SERVER" events rather than misspelled
32379 "STATUS_SEVER" events. Caught by mwenge.
32380 - When counting the number of bytes written on a TLS connection,
32381 look at the BIO actually used for writing to the network, not
32382 at the BIO used (sometimes) to buffer data for the network.
32383 Looking at different BIOs could result in write counts on the
32384 order of ULONG_MAX. Fixes bug 614.
32385 - On Windows, correctly detect errors when listing the contents of
32386 a directory. Fix from lodger.
32388 o Minor bugfixes (on 0.2.0.x):
32389 - Downgrade "sslv3 alert handshake failure" message to INFO.
32390 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
32391 left BandwidthRate and BandwidthBurst at the default, we would be
32392 silently limited by those defaults. Now raise them to match the
32393 RelayBandwidth* values.
32394 - Fix the SVK version detection logic to work correctly on a branch.
32395 - Make --enable-openbsd-malloc work correctly on Linux with alpha
32396 CPUs. Fixes bug 625.
32397 - Logging functions now check that the passed severity is sane.
32398 - Use proper log levels in the testsuite call of
32399 get_interface_address6().
32400 - When using a nonstandard malloc, do not use the platform values for
32401 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
32402 - Make the openbsd malloc code use 8k pages on alpha CPUs and
32404 - Detect mismatched page sizes when using --enable-openbsd-malloc.
32405 - Avoid double-marked-for-close warning when certain kinds of invalid
32406 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
32407 for bug 617. Bugfix on 0.2.0.1-alpha.
32408 - Make sure that the "NULL-means-reject *:*" convention is followed by
32409 all the policy manipulation functions, avoiding some possible crash
32410 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
32411 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
32412 actually works, and doesn't warn about every single reverse lookup.
32413 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
32416 - Only log guard node status when guard node status has changed.
32417 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
32418 make "INFO" 75% less verbose.
32421 Changes in version 0.2.0.21-rc - 2008-03-02
32422 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
32423 makes Tor work well with Vidalia again, fixes a rare assert bug,
32424 and fixes a pair of more minor bugs. The bundles also include Vidalia
32425 0.1.0 and Torbutton 1.1.16.
32428 - The control port should declare that it requires password auth
32429 when HashedControlSessionPassword is set too. Patch from Matt Edman;
32430 bugfix on 0.2.0.20-rc. Fixes bug 615.
32431 - Downgrade assert in connection_buckets_decrement() to a log message.
32432 This may help us solve bug 614, and in any case will make its
32433 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
32434 - We were sometimes miscounting the number of bytes read from the
32435 network, causing our rate limiting to not be followed exactly.
32436 Bugfix on 0.2.0.16-alpha. Reported by lodger.
32439 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
32440 OpenSSL versions should have been working fine. Diagnosis and patch
32441 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
32442 Bugfix on 0.2.0.20-rc.
32445 Changes in version 0.2.0.20-rc - 2008-02-24
32446 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
32447 makes more progress towards normalizing Tor's TLS handshake, makes
32448 hidden services work better again, helps relays bootstrap if they don't
32449 know their IP address, adds optional support for linking in openbsd's
32450 allocator or tcmalloc, allows really fast relays to scale past 15000
32451 sockets, and fixes a bunch of minor bugs reported by Veracode.
32454 - Enable the revised TLS handshake based on the one designed by
32455 Steven Murdoch in proposal 124, as revised in proposal 130. It
32456 includes version negotiation for OR connections as described in
32457 proposal 105. The new handshake is meant to be harder for censors
32458 to fingerprint, and it adds the ability to detect certain kinds of
32459 man-in-the-middle traffic analysis attacks. The version negotiation
32460 feature will allow us to improve Tor's link protocol more safely
32462 - Choose which bridge to use proportional to its advertised bandwidth,
32463 rather than uniformly at random. This should speed up Tor for
32464 bridge users. Also do this for people who set StrictEntryNodes.
32465 - When a TrackHostExits-chosen exit fails too many times in a row,
32466 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
32469 - Resolved problems with (re-)fetching hidden service descriptors.
32470 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
32471 and 0.2.0.19-alpha.
32472 - If we only ever used Tor for hidden service lookups or posts, we
32473 would stop building circuits and start refusing connections after
32474 24 hours, since we falsely believed that Tor was dormant. Reported
32475 by nwf; bugfix on 0.1.2.x.
32476 - Servers that don't know their own IP address should go to the
32477 authorities for their first directory fetch, even if their DirPort
32478 is off or if they don't know they're reachable yet. This will help
32479 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
32480 - When counting the number of open sockets, count not only the number
32481 of sockets we have received from the socket() call, but also
32482 the number we've gotten from accept() and socketpair(). This bug
32483 made us fail to count all sockets that we were using for incoming
32484 connections. Bugfix on 0.2.0.x.
32485 - Fix code used to find strings within buffers, when those strings
32486 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
32487 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
32488 - Add a new __HashedControlSessionPassword option for controllers
32489 to use for one-off session password hashes that shouldn't get
32490 saved to disk by SAVECONF --- Vidalia users were accumulating a
32491 pile of HashedControlPassword lines in their torrc files, one for
32492 each time they had restarted Tor and then clicked Save. Make Tor
32493 automatically convert "HashedControlPassword" to this new option but
32494 only when it's given on the command line. Partial fix for bug 586.
32496 o Minor features (performance):
32497 - Tune parameters for cell pool allocation to minimize amount of
32499 - Add OpenBSD malloc code from phk as an optional malloc
32500 replacement on Linux: some glibc libraries do very poorly
32501 with Tor's memory allocation patterns. Pass
32502 --enable-openbsd-malloc to get the replacement malloc code.
32503 - Add a --with-tcmalloc option to the configure script to link
32504 against tcmalloc (if present). Does not yet search for
32505 non-system include paths.
32506 - Stop imposing an arbitrary maximum on the number of file descriptors
32507 used for busy servers. Bug reported by Olaf Selke; patch from
32510 o Minor features (other):
32511 - When SafeLogging is disabled, log addresses along with all TLS
32513 - When building with --enable-gcc-warnings, check for whether Apple's
32514 warning "-Wshorten-64-to-32" is available.
32515 - Add a --passphrase-fd argument to the tor-gencert command for
32518 o Minor bugfixes (memory leaks and code problems):
32519 - We were leaking a file descriptor if Tor started with a zero-length
32520 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
32521 - Detect size overflow in zlib code. Reported by Justin Ferguson and
32523 - We were comparing the raw BridgePassword entry with a base64'ed
32524 version of it, when handling a "/tor/networkstatus-bridges"
32525 directory request. Now compare correctly. Noticed by Veracode.
32526 - Recover from bad tracked-since value in MTBF-history file.
32527 Should fix bug 537.
32528 - Alter the code that tries to recover from unhandled write
32529 errors, to not try to flush onto a socket that's given us
32530 unhandled errors. Bugfix on 0.1.2.x.
32531 - Make Unix controlsockets work correctly on OpenBSD. Patch from
32532 tup. Bugfix on 0.2.0.3-alpha.
32534 o Minor bugfixes (other):
32535 - If we have an extra-info document for our server, always make
32536 it available on the control port, even if we haven't gotten
32537 a copy of it from an authority yet. Patch from mwenge.
32538 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
32539 - Directory mirrors no longer include a guess at the client's IP
32540 address if the connection appears to be coming from the same /24
32541 network; it was producing too many wrong guesses.
32542 - Make the new hidden service code respect the SafeLogging setting.
32543 Bugfix on 0.2.0.x. Patch from Karsten.
32544 - When starting as an authority, do not overwrite all certificates
32545 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
32546 - If we're trying to flush the last bytes on a connection (for
32547 example, when answering a directory request), reset the
32548 time-to-give-up timeout every time we manage to write something
32549 on the socket. Bugfix on 0.1.2.x.
32550 - Change the behavior of "getinfo status/good-server-descriptor"
32551 so it doesn't return failure when any authority disappears.
32552 - Even though the man page said that "TrackHostExits ." should
32553 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
32554 - Report TLS "zero return" case as a "clean close" and "IO error"
32555 as a "close". Stop calling closes "unexpected closes": existing
32556 Tors don't use SSL_close(), so having a connection close without
32557 the TLS shutdown handshake is hardly unexpected.
32558 - Send NAMESERVER_STATUS messages for a single failed nameserver
32561 o Code simplifications and refactoring:
32562 - Remove the tor_strpartition function: its logic was confused,
32563 and it was only used for one thing that could be implemented far
32567 Changes in version 0.2.0.19-alpha - 2008-02-09
32568 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
32569 handshake, makes path selection for relays more secure and IP address
32570 guessing more robust, and generally fixes a lot of bugs in preparation
32571 for calling the 0.2.0 branch stable.
32574 - Do not include recognizeable strings in the commonname part of
32575 Tor's x509 certificates.
32578 - If we're a relay, avoid picking ourselves as an introduction point,
32579 a rendezvous point, or as the final hop for internal circuits. Bug
32580 reported by taranis and lodger. Bugfix on 0.1.2.x.
32581 - Patch from "Andrew S. Lists" to catch when we contact a directory
32582 mirror at IP address X and he says we look like we're coming from
32583 IP address X. Bugfix on 0.1.2.x.
32585 o Minor features (security):
32586 - Be more paranoid about overwriting sensitive memory on free(),
32587 as a defensive programming tactic to ensure forward secrecy.
32589 o Minor features (directory authority):
32590 - Actually validate the options passed to AuthDirReject,
32591 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
32592 - Reject router descriptors with out-of-range bandwidthcapacity or
32593 bandwidthburst values.
32595 o Minor features (controller):
32596 - Reject controller commands over 1MB in length. This keeps rogue
32597 processes from running us out of memory.
32599 o Minor features (misc):
32600 - Give more descriptive well-formedness errors for out-of-range
32601 hidden service descriptor/protocol versions.
32602 - Make memory debugging information describe more about history
32603 of cell allocation, so we can help reduce our memory use.
32605 o Deprecated features (controller):
32606 - The status/version/num-versioning and status/version/num-concurring
32607 GETINFO options are no longer useful in the v3 directory protocol:
32608 treat them as deprecated, and warn when they're used.
32611 - When our consensus networkstatus has been expired for a while, stop
32612 being willing to build circuits using it. Fixes bug 401. Bugfix
32614 - Directory caches now fetch certificates from all authorities
32615 listed in a networkstatus consensus, even when they do not
32616 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
32617 - When connecting to a bridge without specifying its key, insert
32618 the connection into the identity-to-connection map as soon as
32619 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
32620 - Detect versions of OS X where malloc_good_size() is present in the
32621 library but never actually declared. Resolves bug 587. Bugfix
32623 - Stop incorrectly truncating zlib responses to directory authority
32624 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
32625 - Stop recommending that every server operator send mail to tor-ops.
32626 Resolves bug 597. Bugfix on 0.1.2.x.
32627 - Don't trigger an assert if we start a directory authority with a
32628 private IP address (like 127.0.0.1).
32629 - Avoid possible failures when generating a directory with routers
32630 with over-long versions strings, or too many flags set. Bugfix
32632 - If an attempt to launch a DNS resolve request over the control
32633 port fails because we have overrun the limit on the number of
32634 connections, tell the controller that the request has failed.
32635 - Avoid using too little bandwidth when our clock skips a few
32636 seconds. Bugfix on 0.1.2.x.
32637 - Fix shell error when warning about missing packages in configure
32638 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
32639 - Do not become confused when receiving a spurious VERSIONS-like
32640 cell from a confused v1 client. Bugfix on 0.2.0.x.
32641 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
32642 introduction points for a hidden service have failed. Patch from
32643 Karsten Loesing. Bugfix on 0.2.0.x.
32645 o Code simplifications and refactoring:
32646 - Remove some needless generality from cpuworker code, for improved
32648 - Stop overloading the circuit_t.onionskin field for both "onionskin
32649 from a CREATE cell that we are waiting for a cpuworker to be
32650 assigned" and "onionskin from an EXTEND cell that we are going to
32651 send to an OR as soon as we are connected". Might help with bug 600.
32652 - Add an in-place version of aes_crypt() so that we can avoid doing a
32653 needless memcpy() call on each cell payload.
32656 Changes in version 0.2.0.18-alpha - 2008-01-25
32657 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
32658 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
32659 that can warn or reject connections to ports generally associated with
32660 vulnerable-plaintext protocols.
32662 o New directory authorities:
32663 - Set up dannenberg (run by CCC) as the sixth v3 directory
32667 - Fix a major memory leak when attempting to use the v2 TLS
32668 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
32669 - We accidentally enabled the under-development v2 TLS handshake
32670 code, which was causing log entries like "TLS error while
32671 renegotiating handshake". Disable it again. Resolves bug 590.
32672 - We were computing the wrong Content-Length: header for directory
32673 responses that need to be compressed on the fly, causing clients
32674 asking for those items to always fail. Bugfix on 0.2.0.x; partially
32678 - Avoid going directly to the directory authorities even if you're a
32679 relay, if you haven't found yourself reachable yet or if you've
32680 decided not to advertise your dirport yet. Addresses bug 556.
32681 - If we've gone 12 hours since our last bandwidth check, and we
32682 estimate we have less than 50KB bandwidth capacity but we could
32683 handle more, do another bandwidth test.
32684 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
32685 Tor can warn and/or refuse connections to ports commonly used with
32686 vulnerable-plaintext protocols. Currently we warn on ports 23,
32687 109, 110, and 143, but we don't reject any.
32690 - When we setconf ClientOnly to 1, close any current OR and Dir
32691 listeners. Reported by mwenge.
32692 - When we get a consensus that's been signed by more people than
32693 we expect, don't log about it; it's not a big deal. Reported
32697 - Don't answer "/tor/networkstatus-bridges" directory requests if
32698 the request isn't encrypted.
32699 - Make "ClientOnly 1" config option disable directory ports too.
32700 - Patches from Karsten Loesing to make v2 hidden services more
32701 robust: work even when there aren't enough HSDir relays available;
32702 retry when a v2 rend desc fetch fails; but don't retry if we
32703 already have a usable v0 rend desc.
32706 Changes in version 0.2.0.17-alpha - 2008-01-17
32707 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
32710 - Make the tor-gencert man page get included correctly in the tarball.
32713 Changes in version 0.2.0.16-alpha - 2008-01-17
32714 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
32715 Loesing, and generally cleans up a lot of features and minor bugs.
32717 o New directory authorities:
32718 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
32721 o Major performance improvements:
32722 - Switch our old ring buffer implementation for one more like that
32723 used by free Unix kernels. The wasted space in a buffer with 1mb
32724 of data will now be more like 8k than 1mb. The new implementation
32725 also avoids realloc();realloc(); patterns that can contribute to
32726 memory fragmentation.
32729 - Configuration files now accept C-style strings as values. This
32730 helps encode characters not allowed in the current configuration
32731 file format, such as newline or #. Addresses bug 557.
32732 - Although we fixed bug 539 (where servers would send HTTP status 503
32733 responses _and_ send a body too), there are still servers out
32734 there that haven't upgraded. Therefore, make clients parse such
32735 bodies when they receive them.
32736 - When we're not serving v2 directory information, there is no reason
32737 to actually keep any around. Remove the obsolete files and directory
32738 on startup if they are very old and we aren't going to serve them.
32740 o Minor performance improvements:
32741 - Reference-count and share copies of address policy entries; only 5%
32742 of them were actually distinct.
32743 - Never walk through the list of logs if we know that no log is
32744 interested in a given message.
32747 - When an authority has not signed a consensus, do not try to
32748 download a nonexistent "certificate with key 00000000". Bugfix
32749 on 0.2.0.x. Fixes bug 569.
32750 - Fix a rare assert error when we're closing one of our threads:
32751 use a mutex to protect the list of logs, so we never write to the
32752 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
32753 bug 575, which is kind of the revenge of bug 222.
32754 - Patch from Karsten Loesing to complain less at both the client
32755 and the relay when a relay used to have the HSDir flag but doesn't
32756 anymore, and we try to upload a hidden service descriptor.
32757 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
32759 - Do not try to download missing certificates until we have tried
32760 to check our fallback consensus. Fixes bug 583.
32761 - Make bridges round reported GeoIP stats info up to the nearest
32762 estimate, not down. Now we can distinguish between "0 people from
32763 this country" and "1 person from this country".
32764 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
32765 - Avoid possible segfault if key generation fails in
32766 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
32767 - Avoid segfault in the case where a badly behaved v2 versioning
32768 directory sends a signed networkstatus with missing client-versions.
32770 - Avoid segfaults on certain complex invocations of
32771 router_get_by_hexdigest(). Bugfix on 0.1.2.
32772 - Correct bad index on array access in parse_http_time(). Bugfix
32774 - Fix possible bug in vote generation when server versions are present
32775 but client versions are not.
32776 - Fix rare bug on REDIRECTSTREAM control command when called with no
32777 port set: it could erroneously report an error when none had
32779 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
32780 compressing large objects and find ourselves with more than 4k
32781 left over. Bugfix on 0.2.0.
32782 - Fix a small memory leak when setting up a hidden service.
32783 - Fix a few memory leaks that could in theory happen under bizarre
32785 - Fix an assert if we post a general-purpose descriptor via the
32786 control port but that descriptor isn't mentioned in our current
32787 network consensus. Bug reported by Jon McLachlan; bugfix on
32790 o Minor features (controller):
32791 - Get NS events working again. Patch from tup.
32792 - The GETCONF command now escapes and quotes configuration values
32793 that don't otherwise fit into the torrc file.
32794 - The SETCONF command now handles quoted values correctly.
32796 o Minor features (directory authorities):
32797 - New configuration options to override default maximum number of
32798 servers allowed on a single IP address. This is important for
32799 running a test network on a single host.
32800 - Actually implement the -s option to tor-gencert.
32801 - Add a manual page for tor-gencert.
32803 o Minor features (bridges):
32804 - Bridge authorities no longer serve bridge descriptors over
32805 unencrypted connections.
32807 o Minor features (other):
32808 - Add hidden services and DNSPorts to the list of things that make
32809 Tor accept that it has running ports. Change starting Tor with no
32810 ports from a fatal error to a warning; we might change it back if
32811 this turns out to confuse anybody. Fixes bug 579.
32814 Changes in version 0.1.2.19 - 2008-01-17
32815 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
32816 exit policy a little bit more conservative so it's safer to run an
32817 exit relay on a home system, and fixes a variety of smaller issues.
32820 - Exit policies now reject connections that are addressed to a
32821 relay's public (external) IP address too, unless
32822 ExitPolicyRejectPrivate is turned off. We do this because too
32823 many relays are running nearby to services that trust them based
32824 on network address.
32827 - When the clock jumps forward a lot, do not allow the bandwidth
32828 buckets to become negative. Fixes bug 544.
32829 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
32830 on every successful resolve. Reported by Mike Perry.
32831 - Purge old entries from the "rephist" database and the hidden
32832 service descriptor database even when DirPort is zero.
32833 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
32834 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
32835 crashing or mis-answering these requests.
32836 - When we decide to send a 503 response to a request for servers, do
32837 not then also send the server descriptors: this defeats the whole
32838 purpose. Fixes bug 539.
32841 - Changing the ExitPolicyRejectPrivate setting should cause us to
32842 rebuild our server descriptor.
32843 - Fix handling of hex nicknames when answering controller requests for
32844 networkstatus by name, or when deciding whether to warn about
32845 unknown routers in a config option. (Patch from mwenge.)
32846 - Fix a couple of hard-to-trigger autoconf problems that could result
32847 in really weird results on platforms whose sys/types.h files define
32848 nonstandard integer types.
32849 - Don't try to create the datadir when running --verify-config or
32850 --hash-password. Resolves bug 540.
32851 - If we were having problems getting a particular descriptor from the
32852 directory caches, and then we learned about a new descriptor for
32853 that router, we weren't resetting our failure count. Reported
32855 - Although we fixed bug 539 (where servers would send HTTP status 503
32856 responses _and_ send a body too), there are still servers out there
32857 that haven't upgraded. Therefore, make clients parse such bodies
32858 when they receive them.
32859 - Run correctly on systems where rlim_t is larger than unsigned long.
32860 This includes some 64-bit systems.
32861 - Run correctly on platforms (like some versions of OS X 10.5) where
32862 the real limit for number of open files is OPEN_FILES, not rlim_max
32863 from getrlimit(RLIMIT_NOFILES).
32864 - Avoid a spurious free on base64 failure.
32865 - Avoid segfaults on certain complex invocations of
32866 router_get_by_hexdigest().
32867 - Fix rare bug on REDIRECTSTREAM control command when called with no
32868 port set: it could erroneously report an error when none had
32872 Changes in version 0.2.0.15-alpha - 2007-12-25
32873 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
32874 features added in 0.2.0.13-alpha.
32877 - Fix several remotely triggerable asserts based on DirPort requests
32878 for a v2 or v3 networkstatus object before we were prepared. This
32879 was particularly bad for 0.2.0.13 and later bridge relays, who
32880 would never have a v2 networkstatus and would thus always crash
32881 when used. Bugfixes on 0.2.0.x.
32882 - Estimate the v3 networkstatus size more accurately, rather than
32883 estimating it at zero bytes and giving it artificially high priority
32884 compared to other directory requests. Bugfix on 0.2.0.x.
32887 - Fix configure.in logic for cross-compilation.
32888 - When we load a bridge descriptor from the cache, and it was
32889 previously unreachable, mark it as retriable so we won't just
32890 ignore it. Also, try fetching a new copy immediately. Bugfixes
32892 - The bridge GeoIP stats were counting other relays, for example
32893 self-reachability and authority-reachability tests.
32896 - Support compilation to target iPhone; patch from cjacker huang.
32897 To build for iPhone, pass the --enable-iphone option to configure.
32900 Changes in version 0.2.0.14-alpha - 2007-12-23
32902 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
32903 without a datadirectory from a previous Tor install. Reported
32905 - Fix a crash when we fetch a descriptor that turns out to be
32906 unexpected (it used to be in our networkstatus when we started
32907 fetching it, but it isn't in our current networkstatus), and we
32908 aren't using bridges. Bugfix on 0.2.0.x.
32909 - Fix a crash when accessing hidden services: it would work the first
32910 time you use a given introduction point for your service, but
32911 on subsequent requests we'd be using garbage memory. Fixed by
32912 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
32913 - Fix a crash when we load a bridge descriptor from disk but we don't
32914 currently have a Bridge line for it in our torrc. Bugfix on
32918 - If bridge authorities set BridgePassword, they will serve a
32919 snapshot of known bridge routerstatuses from their DirPort to
32920 anybody who knows that password. Unset by default.
32923 - Make the unit tests build again.
32924 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
32925 - Make PublishServerDescriptor default to 1, so the default doesn't
32926 have to change as we invent new directory protocol versions.
32927 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
32928 be included unless sys/time.h is already included. Fixes
32929 bug 553. Bugfix on 0.2.0.x.
32930 - If we receive a general-purpose descriptor and then receive an
32931 identical bridge-purpose descriptor soon after, don't discard
32932 the next one as a duplicate.
32935 - If BridgeRelay is set to 1, then the default for
32936 PublishServerDescriptor is now "bridge" rather than "v2,v3".
32937 - If the user sets RelayBandwidthRate but doesn't set
32938 RelayBandwidthBurst, then make them equal rather than erroring out.
32941 Changes in version 0.2.0.13-alpha - 2007-12-21
32942 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
32943 Goodell, fixes many more bugs, and adds a lot of infrastructure for
32946 o New directory authorities:
32947 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
32951 - Only update guard status (usable / not usable) once we have
32952 enough directory information. This was causing us to always pick
32953 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
32954 causing us to discard all our guards on startup if we hadn't been
32955 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
32956 - Purge old entries from the "rephist" database and the hidden
32957 service descriptor databases even when DirPort is zero. Bugfix
32959 - We were ignoring our RelayBandwidthRate for the first 30 seconds
32960 after opening a circuit -- even a relayed circuit. Bugfix on
32962 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
32963 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
32964 crashing or mis-answering these types of requests.
32965 - Relays were publishing their server descriptor to v1 and v2
32966 directory authorities, but they didn't try publishing to v3-only
32967 authorities. Fix this; and also stop publishing to v1 authorities.
32969 - When we were reading router descriptors from cache, we were ignoring
32970 the annotations -- so for example we were reading in bridge-purpose
32971 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
32972 - When we decided to send a 503 response to a request for servers, we
32973 were then also sending the server descriptors: this defeats the
32974 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
32977 - Bridge relays now behave like clients with respect to time
32978 intervals for downloading new consensus documents -- otherwise they
32979 stand out. Bridge users now wait until the end of the interval,
32980 so their bridge relay will be sure to have a new consensus document.
32981 - Three new config options (AlternateDirAuthority,
32982 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
32983 user selectively replace the default directory authorities by type,
32984 rather than the all-or-nothing replacement that DirServer offers.
32985 - Tor can now be configured to read a GeoIP file from disk in one
32986 of two formats. This can be used by controllers to map IP addresses
32987 to countries. Eventually, it may support exit-by-country.
32988 - When possible, bridge relays remember which countries users
32989 are coming from, and report aggregate information in their
32990 extra-info documents, so that the bridge authorities can learn
32991 where Tor is blocked.
32992 - Bridge directory authorities now do reachability testing on the
32993 bridges they know. They provide router status summaries to the
32994 controller via "getinfo ns/purpose/bridge", and also dump summaries
32995 to a file periodically.
32996 - Stop fetching directory info so aggressively if your DirPort is
32997 on but your ORPort is off; stop fetching v2 dir info entirely.
32998 You can override these choices with the new FetchDirInfoEarly
33002 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
33003 consensus documents when there are too many relays at a single
33004 IP address. Now clear it in v2 network status documents too, and
33005 also clear it in routerinfo_t when the relay is no longer listed
33006 in the relevant networkstatus document.
33007 - Don't crash if we get an unexpected value for the
33008 PublishServerDescriptor config option. Reported by Matt Edman;
33009 bugfix on 0.2.0.9-alpha.
33010 - Our new v2 hidden service descriptor format allows descriptors
33011 that have no introduction points. But Tor crashed when we tried
33012 to build a descriptor with no intro points (and it would have
33013 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
33014 by Karsten Loesing.
33015 - Fix building with dmalloc 5.5.2 with glibc.
33016 - Reject uploaded descriptors and extrainfo documents if they're
33017 huge. Otherwise we'll cache them all over the network and it'll
33018 clog everything up. Reported by Aljosha Judmayer.
33019 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
33020 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
33021 - When the DANGEROUS_VERSION controller status event told us we're
33022 running an obsolete version, it used the string "OLD" to describe
33023 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
33024 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
33025 - If we can't expand our list of entry guards (e.g. because we're
33026 using bridges or we have StrictEntryNodes set), don't mark relays
33027 down when they fail a directory request. Otherwise we're too quick
33028 to mark all our entry points down. Bugfix on 0.1.2.x.
33029 - Fix handling of hex nicknames when answering controller requests for
33030 networkstatus by name, or when deciding whether to warn about unknown
33031 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
33032 - Fix a couple of hard-to-trigger autoconf problems that could result
33033 in really weird results on platforms whose sys/types.h files define
33034 nonstandard integer types. Bugfix on 0.1.2.x.
33035 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
33036 - Don't crash on name lookup when we have no current consensus. Fixes
33037 bug 538; bugfix on 0.2.0.x.
33038 - Only Tors that want to mirror the v2 directory info should
33039 create the "cached-status" directory in their datadir. (All Tors
33040 used to create it.) Bugfix on 0.2.0.9-alpha.
33041 - Directory authorities should only automatically download Extra Info
33042 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
33045 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
33046 consumers. (We already do this on HUP.)
33047 - Authorities and caches fetch the v2 networkstatus documents
33048 less often, now that v3 is encouraged.
33049 - Add a new config option BridgeRelay that specifies you want to
33050 be a bridge relay. Right now the only difference is that it makes
33051 you answer begin_dir requests, and it makes you cache dir info,
33052 even if your DirPort isn't on.
33053 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
33054 ask about source, timestamp of arrival, purpose, etc. We need
33055 something like this to help Vidalia not do GeoIP lookups on bridge
33057 - Allow multiple HashedControlPassword config lines, to support
33058 multiple controller passwords.
33059 - Authorities now decide whether they're authoritative for a given
33060 router based on the router's purpose.
33061 - New config options AuthDirBadDir and AuthDirListBadDirs for
33062 authorities to mark certain relays as "bad directories" in the
33063 networkstatus documents. Also supports the "!baddir" directive in
33064 the approved-routers file.
33067 Changes in version 0.2.0.12-alpha - 2007-11-16
33068 This twelfth development snapshot fixes some more build problems as
33069 well as a few minor bugs.
33072 - Make it build on OpenBSD again. Patch from tup.
33073 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
33074 package-building for Red Hat, OS X, etc.
33076 o Minor bugfixes (on 0.1.2.x):
33077 - Changing the ExitPolicyRejectPrivate setting should cause us to
33078 rebuild our server descriptor.
33080 o Minor bugfixes (on 0.2.0.x):
33081 - When we're lacking a consensus, don't try to perform rendezvous
33082 operations. Reported by Karsten Loesing.
33083 - Fix a small memory leak whenever we decide against using a
33084 newly picked entry guard. Reported by Mike Perry.
33085 - When authorities detected more than two relays running on the same
33086 IP address, they were clearing all the status flags but forgetting
33087 to clear the "hsdir" flag. So clients were being told that a
33088 given relay was the right choice for a v2 hsdir lookup, yet they
33089 never had its descriptor because it was marked as 'not running'
33091 - If we're trying to fetch a bridge descriptor and there's no way
33092 the bridge authority could help us (for example, we don't know
33093 a digest, or there is no bridge authority), don't be so eager to
33094 fall back to asking the bridge authority.
33095 - If we're using bridges or have strictentrynodes set, and our
33096 chosen exit is in the same family as all our bridges/entry guards,
33097 then be flexible about families.
33100 - When we negotiate a v2 link-layer connection (not yet implemented),
33101 accept RELAY_EARLY cells and turn them into RELAY cells if we've
33102 negotiated a v1 connection for their next step. Initial code for
33106 Changes in version 0.2.0.11-alpha - 2007-11-12
33107 This eleventh development snapshot fixes some build problems with
33108 the previous snapshot. It also includes a more secure-by-default exit
33109 policy for relays, fixes an enormous memory leak for exit relays, and
33110 fixes another bug where servers were falling out of the directory list.
33113 - Exit policies now reject connections that are addressed to a
33114 relay's public (external) IP address too, unless
33115 ExitPolicyRejectPrivate is turned off. We do this because too
33116 many relays are running nearby to services that trust them based
33117 on network address. Bugfix on 0.1.2.x.
33120 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
33121 on every successful resolve. Reported by Mike Perry; bugfix
33123 - On authorities, never downgrade to old router descriptors simply
33124 because they're listed in the consensus. This created a catch-22
33125 where we wouldn't list a new descriptor because there was an
33126 old one in the consensus, and we couldn't get the new one in the
33127 consensus because we wouldn't list it. Possible fix for bug 548.
33128 Also, this might cause bug 543 to appear on authorities; if so,
33129 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
33131 o Packaging fixes on 0.2.0.10-alpha:
33132 - We were including instructions about what to do with the
33133 src/config/fallback-consensus file, but we weren't actually
33134 including it in the tarball. Disable all of that for now.
33137 - Allow people to say PreferTunnelledDirConns rather than
33138 PreferTunneledDirConns, for those alternate-spellers out there.
33141 - Don't reevaluate all the information from our consensus document
33142 just because we've downloaded a v2 networkstatus that we intend
33143 to cache. Fixes bug 545; bugfix on 0.2.0.x.
33146 Changes in version 0.2.0.10-alpha - 2007-11-10
33147 This tenth development snapshot adds a third v3 directory authority
33148 run by Mike Perry, adds most of Karsten Loesing's new hidden service
33149 descriptor format, fixes a bad crash bug and new bridge bugs introduced
33150 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
33151 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
33152 addresses many more minor issues.
33154 o New directory authorities:
33155 - Set up ides (run by Mike Perry) as the third v3 directory authority.
33158 - Allow tunnelled directory connections to ask for an encrypted
33159 "begin_dir" connection or an anonymized "uses a full Tor circuit"
33160 connection independently. Now we can make anonymized begin_dir
33161 connections for (e.g.) more secure hidden service posting and
33163 - More progress on proposal 114: code from Karsten Loesing to
33164 implement new hidden service descriptor format.
33165 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
33166 accommodate the growing number of servers that use the default
33167 and are reaching it.
33168 - Directory authorities use a new formula for selecting which nodes
33169 to advertise as Guards: they must be in the top 7/8 in terms of
33170 how long we have known about them, and above the median of those
33171 nodes in terms of weighted fractional uptime.
33172 - Make "not enough dir info yet" warnings describe *why* Tor feels
33173 it doesn't have enough directory info yet.
33176 - Stop servers from crashing if they set a Family option (or
33177 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
33179 - Make bridge users work again -- the move to v3 directories in
33180 0.2.0.9-alpha had introduced a number of bugs that made bridges
33181 no longer work for clients.
33182 - When the clock jumps forward a lot, do not allow the bandwidth
33183 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
33185 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
33186 - When the consensus lists a router descriptor that we previously were
33187 mirroring, but that we considered non-canonical, reload the
33188 descriptor as canonical. This fixes bug 543 where Tor servers
33189 would start complaining after a few days that they don't have
33190 enough directory information to build a circuit.
33191 - Consider replacing the current consensus when certificates arrive
33192 that make the pending consensus valid. Previously, we were only
33193 considering replacement when the new certs _didn't_ help.
33194 - Fix an assert error on startup if we didn't already have the
33195 consensus and certs cached in our datadirectory: we were caching
33196 the consensus in consensus_waiting_for_certs but then free'ing it
33198 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
33199 Request) if we need more v3 certs but we've already got pending
33200 requests for all of them.
33201 - Correctly back off from failing certificate downloads. Fixes
33203 - Authorities don't vote on the Running flag if they have been running
33204 for less than 30 minutes themselves. Fixes bug 547, where a newly
33205 started authority would vote that everyone was down.
33207 o New requirements:
33208 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
33209 it, it had no AES, and it hasn't seen any security patches since
33213 - Clients now hold circuitless TLS connections open for 1.5 times
33214 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
33215 rebuild a new circuit over them within that timeframe. Previously,
33216 they held them open only for KeepalivePeriod (5 minutes).
33217 - Use "If-Modified-Since" to avoid retrieving consensus
33218 networkstatuses that we already have.
33219 - When we have no consensus, check FallbackNetworkstatusFile (defaults
33220 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
33221 we start knowing some directory caches.
33222 - When we receive a consensus from the future, warn about skew.
33223 - Improve skew reporting: try to give the user a better log message
33224 about how skewed they are, and how much this matters.
33225 - When we have a certificate for an authority, believe that
33226 certificate's claims about the authority's IP address.
33227 - New --quiet command-line option to suppress the default console log.
33228 Good in combination with --hash-password.
33229 - Authorities send back an X-Descriptor-Not-New header in response to
33230 an accepted-but-discarded descriptor upload. Partially implements
33232 - Make the log message for "tls error. breaking." more useful.
33233 - Better log messages about certificate downloads, to attempt to
33234 track down the second incarnation of bug 546.
33236 o Minor features (bridges):
33237 - If bridge users set UpdateBridgesFromAuthority, but the digest
33238 they ask for is a 404 from the bridge authority, they now fall
33239 back to trying the bridge directly.
33240 - Bridges now use begin_dir to publish their server descriptor to
33241 the bridge authority, even when they haven't set TunnelDirConns.
33243 o Minor features (controller):
33244 - When reporting clock skew, and we know that the clock is _at least
33245 as skewed_ as some value, but we don't know the actual value,
33246 report the value as a "minimum skew."
33249 - Update linux-tor-prio.sh script to allow QoS based on the uid of
33250 the Tor process. Patch from Marco Bonetti with tweaks from Mike
33254 - Refuse to start if both ORPort and UseBridges are set. Bugfix
33255 on 0.2.0.x, suggested by Matt Edman.
33256 - Don't stop fetching descriptors when FetchUselessDescriptors is
33257 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
33258 reported by tup and ioerror.
33259 - Better log message on vote from unknown authority.
33260 - Don't log "Launching 0 request for 0 router" message.
33262 o Minor bugfixes (memory leaks):
33263 - Stop leaking memory every time we parse a v3 certificate. Bugfix
33265 - Stop leaking memory every time we load a v3 certificate. Bugfix
33266 on 0.2.0.1-alpha. Fixes bug 536.
33267 - Stop leaking a cached networkstatus on exit. Bugfix on
33269 - Stop leaking voter information every time we free a consensus.
33270 Bugfix on 0.2.0.3-alpha.
33271 - Stop leaking signed data every time we check a voter signature.
33272 Bugfix on 0.2.0.3-alpha.
33273 - Stop leaking a signature every time we fail to parse a consensus or
33274 a vote. Bugfix on 0.2.0.3-alpha.
33275 - Stop leaking v2_download_status_map on shutdown. Bugfix on
33277 - Stop leaking conn->nickname every time we make a connection to a
33278 Tor relay without knowing its expected identity digest (e.g. when
33279 using bridges). Bugfix on 0.2.0.3-alpha.
33281 - Minor bugfixes (portability):
33282 - Run correctly on platforms where rlim_t is larger than unsigned
33283 long, and/or where the real limit for number of open files is
33284 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
33285 particular, these may be needed for OS X 10.5.
33288 Changes in version 0.1.2.18 - 2007-10-28
33289 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
33290 hidden service introduction that were causing huge delays, and a big
33291 bug that was causing some servers to disappear from the network status
33292 lists for a few hours each day.
33294 o Major bugfixes (crashes):
33295 - If a connection is shut down abruptly because of something that
33296 happened inside connection_flushed_some(), do not call
33297 connection_finished_flushing(). Should fix bug 451:
33298 "connection_stop_writing: Assertion conn->write_event failed"
33299 Bugfix on 0.1.2.7-alpha.
33300 - Fix possible segfaults in functions called from
33301 rend_process_relay_cell().
33303 o Major bugfixes (hidden services):
33304 - Hidden services were choosing introduction points uniquely by
33305 hexdigest, but when constructing the hidden service descriptor
33306 they merely wrote the (potentially ambiguous) nickname.
33307 - Clients now use the v2 intro format for hidden service
33308 connections: they specify their chosen rendezvous point by identity
33309 digest rather than by (potentially ambiguous) nickname. These
33310 changes could speed up hidden service connections dramatically.
33312 o Major bugfixes (other):
33313 - Stop publishing a new server descriptor just because we get a
33314 HUP signal. This led (in a roundabout way) to some servers getting
33315 dropped from the networkstatus lists for a few hours each day.
33316 - When looking for a circuit to cannibalize, consider family as well
33317 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33318 circuit cannibalization).
33319 - When a router wasn't listed in a new networkstatus, we were leaving
33320 the flags for that router alone -- meaning it remained Named,
33321 Running, etc -- even though absence from the networkstatus means
33322 that it shouldn't be considered to exist at all anymore. Now we
33323 clear all the flags for routers that fall out of the networkstatus
33324 consensus. Fixes bug 529.
33327 - Don't try to access (or alter) the state file when running
33328 --list-fingerprint or --verify-config or --hash-password. Resolves
33330 - When generating information telling us how to extend to a given
33331 router, do not try to include the nickname if it is
33332 absent. Resolves bug 467.
33333 - Fix a user-triggerable segfault in expand_filename(). (There isn't
33334 a way to trigger this remotely.)
33335 - When sending a status event to the controller telling it that an
33336 OR address is reachable, set the port correctly. (Previously we
33337 were reporting the dir port.)
33338 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33339 command. Bugfix on 0.1.2.17.
33340 - When loading bandwidth history, do not believe any information in
33341 the future. Fixes bug 434.
33342 - When loading entry guard information, do not believe any information
33344 - When we have our clock set far in the future and generate an
33345 onion key, then re-set our clock to be correct, we should not stop
33346 the onion key from getting rotated.
33347 - On some platforms, accept() can return a broken address. Detect
33348 this more quietly, and deal accordingly. Fixes bug 483.
33349 - It's not actually an error to find a non-pending entry in the DNS
33350 cache when canceling a pending resolve. Don't log unless stuff
33351 is fishy. Resolves bug 463.
33352 - Don't reset trusted dir server list when we set a configuration
33353 option. Patch from Robert Hogan.
33354 - Don't try to create the datadir when running --verify-config or
33355 --hash-password. Resolves bug 540.
33358 Changes in version 0.2.0.9-alpha - 2007-10-24
33359 This ninth development snapshot switches clients to the new v3 directory
33360 system; allows servers to be listed in the network status even when they
33361 have the same nickname as a registered server; and fixes many other
33362 bugs including a big one that was causing some servers to disappear
33363 from the network status lists for a few hours each day.
33365 o Major features (directory system):
33366 - Clients now download v3 consensus networkstatus documents instead
33367 of v2 networkstatus documents. Clients and caches now base their
33368 opinions about routers on these consensus documents. Clients only
33369 download router descriptors listed in the consensus.
33370 - Authorities now list servers who have the same nickname as
33371 a different named server, but list them with a new flag,
33372 "Unnamed". Now we can list servers that happen to pick the same
33373 nickname as a server that registered two years ago and then
33374 disappeared. Partially implements proposal 122.
33375 - If the consensus lists a router as "Unnamed", the name is assigned
33376 to a different router: do not identify the router by that name.
33377 Partially implements proposal 122.
33378 - Authorities can now come to a consensus on which method to use to
33379 compute the consensus. This gives us forward compatibility.
33382 - Stop publishing a new server descriptor just because we HUP or
33383 when we find our DirPort to be reachable but won't actually publish
33384 it. New descriptors without any real changes are dropped by the
33385 authorities, and can screw up our "publish every 18 hours" schedule.
33387 - When a router wasn't listed in a new networkstatus, we were leaving
33388 the flags for that router alone -- meaning it remained Named,
33389 Running, etc -- even though absence from the networkstatus means
33390 that it shouldn't be considered to exist at all anymore. Now we
33391 clear all the flags for routers that fall out of the networkstatus
33392 consensus. Fixes bug 529; bugfix on 0.1.2.x.
33393 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
33394 extrainfo documents and then discard them immediately for not
33395 matching the latest router. Bugfix on 0.2.0.1-alpha.
33397 o Minor features (v3 directory protocol):
33398 - Allow tor-gencert to generate a new certificate without replacing
33400 - Allow certificates to include an address.
33401 - When we change our directory-cache settings, reschedule all voting
33402 and download operations.
33403 - Reattempt certificate downloads immediately on failure, as long as
33404 we haven't failed a threshold number of times yet.
33405 - Delay retrying consensus downloads while we're downloading
33406 certificates to verify the one we just got. Also, count getting a
33407 consensus that we already have (or one that isn't valid) as a failure,
33408 and count failing to get the certificates after 20 minutes as a
33410 - Build circuits and download descriptors even if our consensus is a
33411 little expired. (This feature will go away once authorities are
33414 o Minor features (router descriptor cache):
33415 - If we find a cached-routers file that's been sitting around for more
33416 than 28 days unmodified, then most likely it's a leftover from
33417 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
33419 - When we (as a cache) download a descriptor because it was listed
33420 in a consensus, remember when the consensus was supposed to expire,
33421 and don't expire the descriptor until then.
33423 o Minor features (performance):
33424 - Call routerlist_remove_old_routers() much less often. This should
33425 speed startup, especially on directory caches.
33426 - Don't try to launch new descriptor downloads quite so often when we
33427 already have enough directory information to build circuits.
33428 - Base64 decoding was actually showing up on our profile when parsing
33429 the initial descriptor file; switch to an in-process all-at-once
33430 implementation that's about 3.5x times faster than calling out to
33433 o Minor features (compilation):
33434 - Detect non-ASCII platforms (if any still exist) and refuse to
33435 build there: some of our code assumes that 'A' is 65 and so on.
33437 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
33438 - Make the "next period" votes into "current period" votes immediately
33439 after publishing the consensus; avoid a heisenbug that made them
33440 stick around indefinitely.
33441 - When we discard a vote as a duplicate, do not report this as
33443 - Treat missing v3 keys or certificates as an error when running as a
33444 v3 directory authority.
33445 - When we're configured to be a v3 authority, but we're only listed
33446 as a non-v3 authority in our DirServer line for ourself, correct
33448 - If an authority doesn't have a qualified hostname, just put
33449 its address in the vote. This fixes the problem where we referred to
33450 "moria on moria:9031."
33451 - Distinguish between detached signatures for the wrong period, and
33452 detached signatures for a divergent vote.
33453 - Fix a small memory leak when computing a consensus.
33454 - When there's no consensus, we were forming a vote every 30
33455 minutes, but writing the "valid-after" line in our vote based
33456 on our configured V3AuthVotingInterval: so unless the intervals
33457 matched up, we immediately rejected our own vote because it didn't
33458 start at the voting interval that caused us to construct a vote.
33460 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
33461 - Delete unverified-consensus when the real consensus is set.
33462 - Consider retrying a consensus networkstatus fetch immediately
33463 after one fails: don't wait 60 seconds to notice.
33464 - When fetching a consensus as a cache, wait until a newer consensus
33465 should exist before trying to replace the current one.
33466 - Use a more forgiving schedule for retrying failed consensus
33467 downloads than for other types.
33469 o Minor bugfixes (other directory issues):
33470 - Correct the implementation of "download votes by digest." Bugfix on
33472 - Authorities no longer send back "400 you're unreachable please fix
33473 it" errors to Tor servers that aren't online all the time. We're
33474 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
33476 o Minor bugfixes (controller):
33477 - Don't reset trusted dir server list when we set a configuration
33478 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
33479 - Respond to INT and TERM SIGNAL commands before we execute the
33480 signal, in case the signal shuts us down. We had a patch in
33481 0.1.2.1-alpha that tried to do this by queueing the response on
33482 the connection's buffer before shutting down, but that really
33483 isn't the same thing at all. Bug located by Matt Edman.
33485 o Minor bugfixes (misc):
33486 - Correctly check for bad options to the "PublishServerDescriptor"
33487 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
33488 - Stop leaking memory on failing case of base32_decode, and make
33489 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
33490 - Don't try to download extrainfo documents when we're trying to
33491 fetch enough directory info to build a circuit: having enough
33492 info should get priority. Bugfix on 0.2.0.x.
33493 - Don't complain that "your server has not managed to confirm that its
33494 ports are reachable" if we haven't been able to build any circuits
33495 yet. Bug found by spending four hours without a v3 consensus. Bugfix
33497 - Detect the reason for failing to mmap a descriptor file we just
33498 wrote, and give a more useful log message. Fixes bug 533. Bugfix
33501 o Code simplifications and refactoring:
33502 - Remove support for the old bw_accounting file: we've been storing
33503 bandwidth accounting information in the state file since
33504 0.1.2.5-alpha. This may result in bandwidth accounting errors
33505 if you try to upgrade from 0.1.1.x or earlier, or if you try to
33506 downgrade to 0.1.1.x or earlier.
33507 - New convenience code to locate a file within the DataDirectory.
33508 - Move non-authority functionality out of dirvote.c.
33509 - Refactor the arguments for router_pick_{directory_|trusteddir}server
33510 so that they all take the same named flags.
33513 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
33514 Unix users an easy way to script their Tor process (e.g. by
33515 adjusting bandwidth based on the time of the day).
33518 Changes in version 0.2.0.8-alpha - 2007-10-12
33519 This eighth development snapshot fixes a crash bug that's been bothering
33520 us since February 2007, lets bridge authorities store a list of bridge
33521 descriptors they've seen, gets v3 directory voting closer to working,
33522 starts caching v3 directory consensus documents on directory mirrors,
33523 and fixes a variety of smaller issues including some minor memory leaks.
33525 o Major features (router descriptor cache):
33526 - Store routers in a file called cached-descriptors instead of in
33527 cached-routers. Initialize cached-descriptors from cached-routers
33528 if the old format is around. The new format allows us to store
33529 annotations along with descriptors.
33530 - Use annotations to record the time we received each descriptor, its
33531 source, and its purpose.
33532 - Disable the SETROUTERPURPOSE controller command: it is now
33534 - Controllers should now specify cache=no or cache=yes when using
33535 the +POSTDESCRIPTOR command.
33536 - Bridge authorities now write bridge descriptors to disk, meaning
33537 we can export them to other programs and begin distributing them
33540 o Major features (directory authorities):
33541 - When a v3 authority is missing votes or signatures, it now tries
33543 - Directory authorities track weighted fractional uptime as well as
33544 weighted mean-time-between failures. WFU is suitable for deciding
33545 whether a node is "usually up", while MTBF is suitable for deciding
33546 whether a node is "likely to stay up." We need both, because
33547 "usually up" is a good requirement for guards, while "likely to
33548 stay up" is a good requirement for long-lived connections.
33550 o Major features (v3 directory system):
33551 - Caches now download v3 network status documents as needed,
33552 and download the descriptors listed in them.
33553 - All hosts now attempt to download and keep fresh v3 authority
33554 certificates, and re-attempt after failures.
33555 - More internal-consistency checks for vote parsing.
33557 o Major bugfixes (crashes):
33558 - If a connection is shut down abruptly because of something that
33559 happened inside connection_flushed_some(), do not call
33560 connection_finished_flushing(). Should fix bug 451. Bugfix on
33563 o Major bugfixes (performance):
33564 - Fix really bad O(n^2) performance when parsing a long list of
33565 routers: Instead of searching the entire list for an "extra-info "
33566 string which usually wasn't there, once for every routerinfo
33567 we read, just scan lines forward until we find one we like.
33569 - When we add data to a write buffer in response to the data on that
33570 write buffer getting low because of a flush, do not consider the
33571 newly added data as a candidate for immediate flushing, but rather
33572 make it wait until the next round of writing. Otherwise, we flush
33573 and refill recursively, and a single greedy TLS connection can
33574 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
33576 o Minor features (v3 authority system):
33577 - Add more ways for tools to download the votes that lead to the
33579 - Send a 503 when low on bandwidth and a vote, consensus, or
33580 certificate is requested.
33581 - If-modified-since is now implemented properly for all kinds of
33582 certificate requests.
33584 o Minor bugfixes (network statuses):
33585 - Tweak the implementation of proposal 109 slightly: allow at most
33586 two Tor servers on the same IP address, except if it's the location
33587 of a directory authority, in which case allow five. Bugfix on
33590 o Minor bugfixes (controller):
33591 - When sending a status event to the controller telling it that an
33592 OR address is reachable, set the port correctly. (Previously we
33593 were reporting the dir port.) Bugfix on 0.1.2.x.
33595 o Minor bugfixes (v3 directory system):
33596 - Fix logic to look up a cert by its signing key digest. Bugfix on
33598 - Only change the reply to a vote to "OK" if it's not already
33599 set. This gets rid of annoying "400 OK" log messages, which may
33600 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
33601 - When we get a valid consensus, recompute the voting schedule.
33602 - Base the valid-after time of a vote on the consensus voting
33603 schedule, not on our preferred schedule.
33604 - Make the return values and messages from signature uploads and
33605 downloads more sensible.
33606 - Fix a memory leak when serving votes and consensus documents, and
33607 another when serving certificates.
33609 o Minor bugfixes (performance):
33610 - Use a slightly simpler string hashing algorithm (copying Python's
33611 instead of Java's) and optimize our digest hashing algorithm to take
33612 advantage of 64-bit platforms and to remove some possibly-costly
33614 - Fix a minor memory leak whenever we parse guards from our state
33615 file. Bugfix on 0.2.0.7-alpha.
33616 - Fix a minor memory leak whenever we write out a file. Bugfix on
33618 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
33619 command. Bugfix on 0.2.0.5-alpha.
33621 o Minor bugfixes (portability):
33622 - On some platforms, accept() can return a broken address. Detect
33623 this more quietly, and deal accordingly. Fixes bug 483.
33624 - Stop calling tor_strlower() on uninitialized memory in some cases.
33625 Bugfix in 0.2.0.7-alpha.
33627 o Minor bugfixes (usability):
33628 - Treat some 403 responses from directory servers as INFO rather than
33629 WARN-severity events.
33630 - It's not actually an error to find a non-pending entry in the DNS
33631 cache when canceling a pending resolve. Don't log unless stuff is
33632 fishy. Resolves bug 463.
33634 o Minor bugfixes (anonymity):
33635 - Never report that we've used more bandwidth than we're willing to
33636 relay: it leaks how much non-relay traffic we're using. Resolves
33638 - When looking for a circuit to cannibalize, consider family as well
33639 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
33640 circuit cannibalization).
33642 o Code simplifications and refactoring:
33643 - Make a bunch of functions static. Remove some dead code.
33644 - Pull out about a third of the really big routerlist.c; put it in a
33645 new module, networkstatus.c.
33646 - Merge the extra fields in local_routerstatus_t back into
33647 routerstatus_t: we used to need one routerstatus_t for each
33648 authority's opinion, plus a local_routerstatus_t for the locally
33649 computed consensus opinion. To save space, we put the locally
33650 modified fields into local_routerstatus_t, and only the common
33651 stuff into routerstatus_t. But once v3 directories are in use,
33652 clients and caches will no longer need to hold authority opinions;
33653 thus, the rationale for keeping the types separate is now gone.
33654 - Make the code used to reschedule and reattempt downloads more
33656 - Turn all 'Are we a directory server/mirror?' logic into a call to
33658 - Remove the code to generate the oldest (v1) directory format.
33659 The code has been disabled since 0.2.0.5-alpha.
33662 Changes in version 0.2.0.7-alpha - 2007-09-21
33663 This seventh development snapshot makes bridges work again, makes bridge
33664 authorities work for the first time, fixes two huge performance flaws
33665 in hidden services, and fixes a variety of minor issues.
33667 o New directory authorities:
33668 - Set up moria1 and tor26 as the first v3 directory authorities. See
33669 doc/spec/dir-spec.txt for details on the new directory design.
33671 o Major bugfixes (crashes):
33672 - Fix possible segfaults in functions called from
33673 rend_process_relay_cell(). Bugfix on 0.1.2.x.
33675 o Major bugfixes (bridges):
33676 - Fix a bug that made servers send a "404 Not found" in response to
33677 attempts to fetch their server descriptor. This caused Tor servers
33678 to take many minutes to establish reachability for their DirPort,
33679 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
33680 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
33681 users configure that and specify a bridge with an identity
33682 fingerprint, now they will lookup the bridge descriptor at the
33683 default bridge authority via a one-hop tunnel, but once circuits
33684 are established they will switch to a three-hop tunnel for later
33685 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
33687 o Major bugfixes (hidden services):
33688 - Hidden services were choosing introduction points uniquely by
33689 hexdigest, but when constructing the hidden service descriptor
33690 they merely wrote the (potentially ambiguous) nickname.
33691 - Clients now use the v2 intro format for hidden service
33692 connections: they specify their chosen rendezvous point by identity
33693 digest rather than by (potentially ambiguous) nickname. Both
33694 are bugfixes on 0.1.2.x, and they could speed up hidden service
33695 connections dramatically. Thanks to Karsten Loesing.
33697 o Minor features (security):
33698 - As a client, do not believe any server that tells us that an
33699 address maps to an internal address space.
33700 - Make it possible to enable HashedControlPassword and
33701 CookieAuthentication at the same time.
33703 o Minor features (guard nodes):
33704 - Tag every guard node in our state file with the version that
33705 we believe added it, or with our own version if we add it. This way,
33706 if a user temporarily runs an old version of Tor and then switches
33707 back to a new one, she doesn't automatically lose her guards.
33709 o Minor features (speed):
33710 - When implementing AES counter mode, update only the portions of the
33711 counter buffer that need to change, and don't keep separate
33712 network-order and host-order counters when they are the same (i.e.,
33713 on big-endian hosts.)
33715 o Minor features (controller):
33716 - Accept LF instead of CRLF on controller, since some software has a
33717 hard time generating real Internet newlines.
33718 - Add GETINFO values for the server status events
33719 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
33722 o Removed features:
33723 - Routers no longer include bandwidth-history lines in their
33724 descriptors; this information is already available in extra-info
33725 documents, and including it in router descriptors took up 60%
33726 (!) of compressed router descriptor downloads. Completes
33727 implementation of proposal 104.
33728 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
33729 and TorControl.py, as they use the old v0 controller protocol,
33730 and are obsoleted by TorFlow anyway.
33731 - Drop support for v1 rendezvous descriptors, since we never used
33732 them anyway, and the code has probably rotted by now. Based on
33733 patch from Karsten Loesing.
33734 - On OSX, stop warning the user that kqueue support in libevent is
33735 "experimental", since it seems to have worked fine for ages.
33738 - When generating information telling us how to extend to a given
33739 router, do not try to include the nickname if it is absent. Fixes
33740 bug 467. Bugfix on 0.2.0.3-alpha.
33741 - Fix a user-triggerable (but not remotely-triggerable) segfault
33742 in expand_filename(). Bugfix on 0.1.2.x.
33743 - Fix a memory leak when freeing incomplete requests from DNSPort.
33744 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
33745 - Don't try to access (or alter) the state file when running
33746 --list-fingerprint or --verify-config or --hash-password. (Resolves
33747 bug 499.) Bugfix on 0.1.2.x.
33748 - Servers used to decline to publish their DirPort if their
33749 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
33750 were below a threshold. Now they only look at BandwidthRate and
33751 RelayBandwidthRate. Bugfix on 0.1.2.x.
33752 - Remove an optimization in the AES counter-mode code that assumed
33753 that the counter never exceeded 2^68. When the counter can be set
33754 arbitrarily as an IV (as it is by Karsten's new hidden services
33755 code), this assumption no longer holds. Bugfix on 0.1.2.x.
33756 - Resume listing "AUTHORITY" flag for authorities in network status.
33757 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
33759 o Code simplifications and refactoring:
33760 - Revamp file-writing logic so we don't need to have the entire
33761 contents of a file in memory at once before we write to disk. Tor,
33763 - Turn "descriptor store" into a full-fledged type.
33764 - Move all NT services code into a separate source file.
33765 - Unify all code that computes medians, percentile elements, etc.
33766 - Get rid of a needless malloc when parsing address policies.
33769 Changes in version 0.1.2.17 - 2007-08-30
33770 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
33771 X bundles. Vidalia 0.0.14 makes authentication required for the
33772 ControlPort in the default configuration, which addresses important
33773 security risks. Everybody who uses Vidalia (or another controller)
33776 In addition, this Tor update fixes major load balancing problems with
33777 path selection, which should speed things up a lot once many people
33780 o Major bugfixes (security):
33781 - We removed support for the old (v0) control protocol. It has been
33782 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
33783 become more of a headache than it's worth.
33785 o Major bugfixes (load balancing):
33786 - When choosing nodes for non-guard positions, weight guards
33787 proportionally less, since they already have enough load. Patch
33789 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
33790 will allow fast Tor servers to get more attention.
33791 - When we're upgrading from an old Tor version, forget our current
33792 guards and pick new ones according to the new weightings. These
33793 three load balancing patches could raise effective network capacity
33794 by a factor of four. Thanks to Mike Perry for measurements.
33796 o Major bugfixes (stream expiration):
33797 - Expire not-yet-successful application streams in all cases if
33798 they've been around longer than SocksTimeout. Right now there are
33799 some cases where the stream will live forever, demanding a new
33800 circuit every 15 seconds. Fixes bug 454; reported by lodger.
33802 o Minor features (controller):
33803 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
33804 is valid before any authentication has been received. It tells
33805 a controller what kind of authentication is expected, and what
33806 protocol is spoken. Implements proposal 119.
33808 o Minor bugfixes (performance):
33809 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
33810 greatly speeding up loading cached-routers from disk on startup.
33811 - Disable sentinel-based debugging for buffer code: we squashed all
33812 the bugs that this was supposed to detect a long time ago, and now
33813 its only effect is to change our buffer sizes from nice powers of
33814 two (which platform mallocs tend to like) to values slightly over
33815 powers of two (which make some platform mallocs sad).
33817 o Minor bugfixes (misc):
33818 - If exit bandwidth ever exceeds one third of total bandwidth, then
33819 use the correct formula to weight exit nodes when choosing paths.
33820 Based on patch from Mike Perry.
33821 - Choose perfectly fairly among routers when choosing by bandwidth and
33822 weighting by fraction of bandwidth provided by exits. Previously, we
33823 would choose with only approximate fairness, and correct ourselves
33824 if we ran off the end of the list.
33825 - If we require CookieAuthentication but we fail to write the
33826 cookie file, we would warn but not exit, and end up in a state
33827 where no controller could authenticate. Now we exit.
33828 - If we require CookieAuthentication, stop generating a new cookie
33829 every time we change any piece of our config.
33830 - Refuse to start with certain directory authority keys, and
33831 encourage people using them to stop.
33832 - Terminate multi-line control events properly. Original patch
33834 - Fix a minor memory leak when we fail to find enough suitable
33835 servers to choose a circuit.
33836 - Stop leaking part of the descriptor when we run into a particularly
33837 unparseable piece of it.
33840 Changes in version 0.2.0.6-alpha - 2007-08-26
33841 This sixth development snapshot features a new Vidalia version in the
33842 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
33843 the ControlPort in the default configuration, which addresses important
33846 In addition, this snapshot fixes major load balancing problems
33847 with path selection, which should speed things up a lot once many
33848 people have upgraded. The directory authorities also use a new
33849 mean-time-between-failure approach to tracking which servers are stable,
33850 rather than just looking at the most recent uptime.
33852 o New directory authorities:
33853 - Set up Tonga as the default bridge directory authority.
33856 - Directory authorities now track servers by weighted
33857 mean-times-between-failures. When we have 4 or more days of data,
33858 use measured MTBF rather than declared uptime to decide whether
33859 to call a router Stable. Implements proposal 108.
33861 o Major bugfixes (load balancing):
33862 - When choosing nodes for non-guard positions, weight guards
33863 proportionally less, since they already have enough load. Patch
33865 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
33866 will allow fast Tor servers to get more attention.
33867 - When we're upgrading from an old Tor version, forget our current
33868 guards and pick new ones according to the new weightings. These
33869 three load balancing patches could raise effective network capacity
33870 by a factor of four. Thanks to Mike Perry for measurements.
33872 o Major bugfixes (descriptor parsing):
33873 - Handle unexpected whitespace better in malformed descriptors. Bug
33874 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
33877 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
33878 GETINFO for Torstat to use until it can switch to using extrainfos.
33879 - Optionally (if built with -DEXPORTMALLINFO) export the output
33880 of mallinfo via http, as tor/mallinfo.txt. Only accessible
33884 - Do not intermix bridge routers with controller-added
33885 routers. (Bugfix on 0.2.0.x)
33886 - Do not fail with an assert when accept() returns an unexpected
33887 address family. Addresses but does not wholly fix bug 483. (Bugfix
33889 - Let directory authorities startup even when they can't generate
33890 a descriptor immediately, e.g. because they don't know their
33892 - Stop putting the authentication cookie in a file called "0"
33893 in your working directory if you don't specify anything for the
33894 new CookieAuthFile option. Reported by Matt Edman.
33895 - Make it possible to read the PROTOCOLINFO response in a way that
33896 conforms to our control-spec. Reported by Matt Edman.
33897 - Fix a minor memory leak when we fail to find enough suitable
33898 servers to choose a circuit. Bugfix on 0.1.2.x.
33899 - Stop leaking part of the descriptor when we run into a particularly
33900 unparseable piece of it. Bugfix on 0.1.2.x.
33901 - Unmap the extrainfo cache file on exit.
33904 Changes in version 0.2.0.5-alpha - 2007-08-19
33905 This fifth development snapshot fixes compilation on Windows again;
33906 fixes an obnoxious client-side bug that slowed things down and put
33907 extra load on the network; gets us closer to using the v3 directory
33908 voting scheme; makes it easier for Tor controllers to use cookie-based
33909 authentication; and fixes a variety of other bugs.
33911 o Removed features:
33912 - Version 1 directories are no longer generated in full. Instead,
33913 authorities generate and serve "stub" v1 directories that list
33914 no servers. This will stop Tor versions 0.1.0.x and earlier from
33915 working, but (for security reasons) nobody should be running those
33918 o Major bugfixes (compilation, 0.2.0.x):
33919 - Try to fix Win32 compilation again: improve checking for IPv6 types.
33920 - Try to fix MSVC compilation: build correctly on platforms that do
33921 not define s6_addr16 or s6_addr32.
33922 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
33925 o Major bugfixes (stream expiration):
33926 - Expire not-yet-successful application streams in all cases if
33927 they've been around longer than SocksTimeout. Right now there are
33928 some cases where the stream will live forever, demanding a new
33929 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
33930 reported by lodger.
33932 o Minor features (directory servers):
33933 - When somebody requests a list of statuses or servers, and we have
33934 none of those, return a 404 rather than an empty 200.
33936 o Minor features (directory voting):
33937 - Store v3 consensus status consensuses on disk, and reload them
33940 o Minor features (security):
33941 - Warn about unsafe ControlPort configurations.
33942 - Refuse to start with certain directory authority keys, and
33943 encourage people using them to stop.
33945 o Minor features (controller):
33946 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
33947 is valid before any authentication has been received. It tells
33948 a controller what kind of authentication is expected, and what
33949 protocol is spoken. Implements proposal 119.
33950 - New config option CookieAuthFile to choose a new location for the
33951 cookie authentication file, and config option
33952 CookieAuthFileGroupReadable to make it group-readable.
33954 o Minor features (unit testing):
33955 - Add command-line arguments to unit-test executable so that we can
33956 invoke any chosen test from the command line rather than having
33957 to run the whole test suite at once; and so that we can turn on
33958 logging for the unit tests.
33960 o Minor bugfixes (on 0.1.2.x):
33961 - If we require CookieAuthentication but we fail to write the
33962 cookie file, we would warn but not exit, and end up in a state
33963 where no controller could authenticate. Now we exit.
33964 - If we require CookieAuthentication, stop generating a new cookie
33965 every time we change any piece of our config.
33966 - When loading bandwidth history, do not believe any information in
33967 the future. Fixes bug 434.
33968 - When loading entry guard information, do not believe any information
33970 - When we have our clock set far in the future and generate an
33971 onion key, then re-set our clock to be correct, we should not stop
33972 the onion key from getting rotated.
33973 - Clean up torrc sample config file.
33974 - Do not automatically run configure from autogen.sh. This
33975 non-standard behavior tended to annoy people who have built other
33978 o Minor bugfixes (on 0.2.0.x):
33979 - Fix a bug with AutomapHostsOnResolve that would always cause
33980 the second request to fail. Bug reported by Kate. Bugfix on
33982 - Fix a bug in ADDRMAP controller replies that would sometimes
33983 try to print a NULL. Patch from tup.
33984 - Read v3 directory authority keys from the right location.
33985 - Numerous bugfixes to directory voting code.
33988 Changes in version 0.1.2.16 - 2007-08-01
33989 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
33990 remote attacker in certain situations to rewrite the user's torrc
33991 configuration file. This can completely compromise anonymity of users
33992 in most configurations, including those running the Vidalia bundles,
33993 TorK, etc. Or worse.
33995 o Major security fixes:
33996 - Close immediately after missing authentication on control port;
33997 do not allow multiple authentication attempts.
34000 Changes in version 0.2.0.4-alpha - 2007-08-01
34001 This fourth development snapshot fixes a critical security vulnerability
34002 for most users, specifically those running Vidalia, TorK, etc. Everybody
34003 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
34005 o Major security fixes:
34006 - Close immediately after missing authentication on control port;
34007 do not allow multiple authentication attempts.
34009 o Major bugfixes (compilation):
34010 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
34013 o Minor features (performance):
34014 - Be even more aggressive about releasing RAM from small
34015 empty buffers. Thanks to our free-list code, this shouldn't be too
34016 performance-intensive.
34017 - Disable sentinel-based debugging for buffer code: we squashed all
34018 the bugs that this was supposed to detect a long time ago, and
34019 now its only effect is to change our buffer sizes from nice
34020 powers of two (which platform mallocs tend to like) to values
34021 slightly over powers of two (which make some platform mallocs sad).
34022 - Log malloc statistics from mallinfo() on platforms where it
34026 Changes in version 0.2.0.3-alpha - 2007-07-29
34027 This third development snapshot introduces new experimental
34028 blocking-resistance features and a preliminary version of the v3
34029 directory voting design, and includes many other smaller features
34033 - The first pieces of our "bridge" design for blocking-resistance
34034 are implemented. People can run bridge directory authorities;
34035 people can run bridges; and people can configure their Tor clients
34036 with a set of bridges to use as the first hop into the Tor network.
34037 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
34039 - Create listener connections before we setuid to the configured
34040 User and Group. Now non-Windows users can choose port values
34041 under 1024, start Tor as root, and have Tor bind those ports
34042 before it changes to another UID. (Windows users could already
34044 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
34045 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
34046 on "vserver" accounts. (Patch from coderman.)
34047 - Be even more aggressive about separating local traffic from relayed
34048 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
34050 o Major features (experimental):
34051 - First cut of code for "v3 dir voting": directory authorities will
34052 vote on a common network status document rather than each publishing
34053 their own opinion. This code needs more testing and more corner-case
34054 handling before it's ready for use.
34057 - Directory authorities now call routers Fast if their bandwidth is
34058 at least 100KB/s, and consider their bandwidth adequate to be a
34059 Guard if it is at least 250KB/s, no matter the medians. This fix
34060 complements proposal 107. [Bugfix on 0.1.2.x]
34061 - Directory authorities now never mark more than 3 servers per IP as
34062 Valid and Running. (Implements proposal 109, by Kevin Bauer and
34064 - Minor change to organizationName and commonName generation
34065 procedures in TLS certificates during Tor handshakes, to invalidate
34066 some earlier censorware approaches. This is not a long-term
34067 solution, but applying it will give us a bit of time to look into
34068 the epidemiology of countermeasures as they spread.
34070 o Major bugfixes (directory):
34071 - Rewrite directory tokenization code to never run off the end of
34072 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
34074 o Minor features (controller):
34075 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
34076 match requests to applications. (Patch from Robert Hogan.)
34077 - Report address and port correctly on connections to DNSPort. (Patch
34078 from Robert Hogan.)
34079 - Add a RESOLVE command to launch hostname lookups. (Original patch
34080 from Robert Hogan.)
34081 - Add GETINFO status/enough-dir-info to let controllers tell whether
34082 Tor has downloaded sufficient directory information. (Patch
34084 - You can now use the ControlSocket option to tell Tor to listen for
34085 controller connections on Unix domain sockets on systems that
34086 support them. (Patch from Peter Palfrader.)
34087 - STREAM NEW events are generated for DNSPort requests and for
34088 tunneled directory connections. (Patch from Robert Hogan.)
34089 - New "GETINFO address-mappings/*" command to get address mappings
34090 with expiry information. "addr-mappings/*" is now deprecated.
34093 o Minor features (misc):
34094 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
34096 - The tor-gencert tool for v3 directory authorities now creates all
34097 files as readable to the file creator only, and write-protects
34098 the authority identity key.
34099 - When dumping memory usage, list bytes used in buffer memory
34101 - When running with dmalloc, dump more stats on hup and on exit.
34102 - Directory authorities now fail quickly and (relatively) harmlessly
34103 if they generate a network status document that is somehow
34106 o Traffic load balancing improvements:
34107 - If exit bandwidth ever exceeds one third of total bandwidth, then
34108 use the correct formula to weight exit nodes when choosing paths.
34109 (Based on patch from Mike Perry.)
34110 - Choose perfectly fairly among routers when choosing by bandwidth and
34111 weighting by fraction of bandwidth provided by exits. Previously, we
34112 would choose with only approximate fairness, and correct ourselves
34113 if we ran off the end of the list. [Bugfix on 0.1.2.x]
34115 o Performance improvements:
34116 - Be more aggressive with freeing buffer RAM or putting it on the
34118 - Use Critical Sections rather than Mutexes for synchronizing threads
34119 on win32; Mutexes are heavier-weight, and designed for synchronizing
34122 o Deprecated and removed features:
34123 - RedirectExits is now deprecated.
34124 - Stop allowing address masks that do not correspond to bit prefixes.
34125 We have warned about these for a really long time; now it's time
34126 to reject them. (Patch from croup.)
34128 o Minor bugfixes (directory):
34129 - Fix another crash bug related to extra-info caching. (Bug found by
34130 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
34131 - Directories no longer return a "304 not modified" when they don't
34132 have the networkstatus the client asked for. Also fix a memory
34133 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
34134 - We had accidentally labelled 0.1.2.x directory servers as not
34135 suitable for begin_dir requests, and had labelled no directory
34136 servers as suitable for uploading extra-info documents. [Bugfix
34139 o Minor bugfixes (dns):
34140 - Fix a crash when DNSPort is set more than once. (Patch from Robert
34141 Hogan.) [Bugfix on 0.2.0.2-alpha]
34142 - Add DNSPort connections to the global connection list, so that we
34143 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
34145 - Fix a dangling reference that could lead to a crash when DNSPort is
34146 changed or closed (Patch from Robert Hogan.) [Bugfix on
34149 o Minor bugfixes (controller):
34150 - Provide DNS expiry times in GMT, not in local time. For backward
34151 compatibility, ADDRMAP events only provide GMT expiry in an extended
34152 field. "GETINFO address-mappings" always does the right thing.
34153 - Use CRLF line endings properly in NS events.
34154 - Terminate multi-line control events properly. (Original patch
34155 from tup.) [Bugfix on 0.1.2.x-alpha]
34156 - Do not include spaces in SOURCE_ADDR fields in STREAM
34157 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
34160 Changes in version 0.1.2.15 - 2007-07-17
34161 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
34162 problems, fixes compilation on BSD, and fixes a variety of other
34163 bugs. Everybody should upgrade.
34165 o Major bugfixes (compilation):
34166 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
34168 o Major bugfixes (crashes):
34169 - Try even harder not to dereference the first character after
34170 an mmap(). Reported by lodger.
34171 - Fix a crash bug in directory authorities when we re-number the
34172 routerlist while inserting a new router.
34173 - When the cached-routers file is an even multiple of the page size,
34174 don't run off the end and crash. (Fixes bug 455; based on idea
34176 - Fix eventdns.c behavior on Solaris: It is critical to include
34177 orconfig.h _before_ sys/types.h, so that we can get the expected
34178 definition of _FILE_OFFSET_BITS.
34180 o Major bugfixes (security):
34181 - Fix a possible buffer overrun when using BSD natd support. Bug
34183 - When sending destroy cells from a circuit's origin, don't include
34184 the reason for tearing down the circuit. The spec says we didn't,
34185 and now we actually don't. Reported by lodger.
34186 - Keep streamids from different exits on a circuit separate. This
34187 bug may have allowed other routers on a given circuit to inject
34188 cells into streams. Reported by lodger; fixes bug 446.
34189 - If there's a never-before-connected-to guard node in our list,
34190 never choose any guards past it. This way we don't expand our
34191 guard list unless we need to.
34193 o Minor bugfixes (guard nodes):
34194 - Weight guard selection by bandwidth, so that low-bandwidth nodes
34195 don't get overused as guards.
34197 o Minor bugfixes (directory):
34198 - Correctly count the number of authorities that recommend each
34199 version. Previously, we were under-counting by 1.
34200 - Fix a potential crash bug when we load many server descriptors at
34201 once and some of them make others of them obsolete. Fixes bug 458.
34203 o Minor bugfixes (hidden services):
34204 - Stop tearing down the whole circuit when the user asks for a
34205 connection to a port that the hidden service didn't configure.
34208 o Minor bugfixes (misc):
34209 - On Windows, we were preventing other processes from reading
34210 cached-routers while Tor was running. Reported by janbar.
34211 - Fix a possible (but very unlikely) bug in picking routers by
34212 bandwidth. Add a log message to confirm that it is in fact
34213 unlikely. Patch from lodger.
34214 - Backport a couple of memory leak fixes.
34215 - Backport miscellaneous cosmetic bugfixes.
34218 Changes in version 0.2.0.2-alpha - 2007-06-02
34219 o Major bugfixes on 0.2.0.1-alpha:
34220 - Fix an assertion failure related to servers without extra-info digests.
34221 Resolves bugs 441 and 442.
34223 o Minor features (directory):
34224 - Support "If-Modified-Since" when answering HTTP requests for
34225 directories, running-routers documents, and network-status documents.
34226 (There's no need to support it for router descriptors, since those
34227 are downloaded by descriptor digest.)
34229 o Minor build issues:
34230 - Clear up some MIPSPro compiler warnings.
34231 - When building from a tarball on a machine that happens to have SVK
34232 installed, report the micro-revision as whatever version existed
34233 in the tarball, not as "x".
34236 Changes in version 0.2.0.1-alpha - 2007-06-01
34237 This early development snapshot provides new features for people running
34238 Tor as both a client and a server (check out the new RelayBandwidth
34239 config options); lets Tor run as a DNS proxy; and generally moves us
34240 forward on a lot of fronts.
34242 o Major features, server usability:
34243 - New config options RelayBandwidthRate and RelayBandwidthBurst:
34244 a separate set of token buckets for relayed traffic. Right now
34245 relayed traffic is defined as answers to directory requests, and
34246 OR connections that don't have any local circuits on them.
34248 o Major features, client usability:
34249 - A client-side DNS proxy feature to replace the need for
34250 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
34251 for DNS requests on port 9999, use the Tor network to resolve them
34252 anonymously, and send the reply back like a regular DNS server.
34253 The code still only implements a subset of DNS.
34254 - Make PreferTunneledDirConns and TunnelDirConns work even when
34255 we have no cached directory info. This means Tor clients can now
34256 do all of their connections protected by TLS.
34258 o Major features, performance and efficiency:
34259 - Directory authorities accept and serve "extra info" documents for
34260 routers. These documents contain fields from router descriptors
34261 that aren't usually needed, and that use a lot of excess
34262 bandwidth. Once these fields are removed from router descriptors,
34263 the bandwidth savings should be about 60%. [Partially implements
34265 - Servers upload extra-info documents to any authority that accepts
34266 them. Authorities (and caches that have been configured to download
34267 extra-info documents) download them as needed. [Partially implements
34269 - Change the way that Tor buffers data that it is waiting to write.
34270 Instead of queueing data cells in an enormous ring buffer for each
34271 client->OR or OR->OR connection, we now queue cells on a separate
34272 queue for each circuit. This lets us use less slack memory, and
34273 will eventually let us be smarter about prioritizing different kinds
34275 - Use memory pools to allocate cells with better speed and memory
34276 efficiency, especially on platforms where malloc() is inefficient.
34277 - Stop reading on edge connections when their corresponding circuit
34278 buffers are full; start again as the circuits empty out.
34280 o Major features, other:
34281 - Add an HSAuthorityRecordStats option that hidden service authorities
34282 can use to track statistics of overall hidden service usage without
34283 logging information that would be very useful to an attacker.
34284 - Start work implementing multi-level keys for directory authorities:
34285 Add a standalone tool to generate key certificates. (Proposal 103.)
34288 - Directory authorities now call routers Stable if they have an
34289 uptime of at least 30 days, even if that's not the median uptime
34290 in the network. Implements proposal 107, suggested by Kevin Bauer
34293 o Minor fixes (resource management):
34294 - Count the number of open sockets separately from the number
34295 of active connection_t objects. This will let us avoid underusing
34296 our allocated connection limit.
34297 - We no longer use socket pairs to link an edge connection to an
34298 anonymous directory connection or a DirPort test connection.
34299 Instead, we track the link internally and transfer the data
34300 in-process. This saves two sockets per "linked" connection (at the
34301 client and at the server), and avoids the nasty Windows socketpair()
34303 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
34304 for every single inactive connection_t. Free items from the
34305 4k/16k-buffer free lists when they haven't been used for a while.
34307 o Minor features (build):
34308 - Make autoconf search for libevent, openssl, and zlib consistently.
34309 - Update deprecated macros in configure.in.
34310 - When warning about missing headers, tell the user to let us
34311 know if the compile succeeds anyway, so we can downgrade the
34313 - Include the current subversion revision as part of the version
34314 string: either fetch it directly if we're in an SVN checkout, do
34315 some magic to guess it if we're in an SVK checkout, or use
34316 the last-detected version if we're building from a .tar.gz.
34317 Use this version consistently in log messages.
34319 o Minor features (logging):
34320 - Always prepend "Bug: " to any log message about a bug.
34321 - Put a platform string (e.g. "Linux i686") in the startup log
34322 message, so when people paste just their logs, we know if it's
34323 OpenBSD or Windows or what.
34324 - When logging memory usage, break down memory used in buffers by
34327 o Minor features (directory system):
34328 - New config option V2AuthoritativeDirectory that all directory
34329 authorities should set. This will let future authorities choose
34330 not to serve V2 directory information.
34331 - Directory authorities allow multiple router descriptors and/or extra
34332 info documents to be uploaded in a single go. This will make
34333 implementing proposal 104 simpler.
34335 o Minor features (controller):
34336 - Add a new config option __DisablePredictedCircuits designed for
34337 use by the controller, when we don't want Tor to build any circuits
34339 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
34340 so we can exit from the middle of the circuit.
34341 - Implement "getinfo status/circuit-established".
34342 - Implement "getinfo status/version/..." so a controller can tell
34343 whether the current version is recommended, and whether any versions
34344 are good, and how many authorities agree. (Patch from shibz.)
34346 o Minor features (hidden services):
34347 - Allow multiple HiddenServicePort directives with the same virtual
34348 port; when they occur, the user is sent round-robin to one
34349 of the target ports chosen at random. Partially fixes bug 393 by
34350 adding limited ad-hoc round-robining.
34352 o Minor features (other):
34354 - Add a new AutomapHostsOnResolve option: when it is enabled, any
34355 resolve request for hosts matching a given pattern causes Tor to
34356 generate an internal virtual address mapping for that host. This
34357 allows DNSPort to work sensibly with hidden service users. By
34358 default, .exit and .onion addresses are remapped; the list of
34359 patterns can be reconfigured with AutomapHostsSuffixes.
34360 - Add an "-F" option to tor-resolve to force a resolve for a .onion
34361 address. Thanks to the AutomapHostsOnResolve option, this is no
34362 longer a completely silly thing to do.
34363 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
34364 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
34365 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
34366 minus 1 byte: the actual maximum declared bandwidth.
34368 o Removed features:
34369 - Removed support for the old binary "version 0" controller protocol.
34370 This has been deprecated since 0.1.1, and warnings have been issued
34371 since 0.1.2. When we encounter a v0 control message, we now send
34372 back an error and close the connection.
34373 - Remove the old "dns worker" server DNS code: it hasn't been default
34374 since 0.1.2.2-alpha, and all the servers seem to be using the new
34377 o Minor bugfixes (portability):
34378 - Even though Windows is equally happy with / and \ as path separators,
34379 try to use \ consistently on Windows and / consistently on Unix: it
34380 makes the log messages nicer.
34381 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
34382 - Read resolv.conf files correctly on platforms where read() returns
34383 partial results on small file reads.
34385 o Minor bugfixes (directory):
34386 - Correctly enforce that elements of directory objects do not appear
34387 more often than they are allowed to appear.
34388 - When we are reporting the DirServer line we just parsed, we were
34389 logging the second stanza of the key fingerprint, not the first.
34391 o Minor bugfixes (logging):
34392 - When we hit an EOF on a log (probably because we're shutting down),
34393 don't try to remove the log from the list: just mark it as
34394 unusable. (Bulletproofs against bug 222.)
34396 o Minor bugfixes (other):
34397 - In the exitlist script, only consider the most recently published
34398 server descriptor for each server. Also, when the user requests
34399 a list of servers that _reject_ connections to a given address,
34400 explicitly exclude the IPs that also have servers that accept
34401 connections to that address. (Resolves bug 405.)
34402 - Stop allowing hibernating servers to be "stable" or "fast".
34403 - On Windows, we were preventing other processes from reading
34404 cached-routers while Tor was running. (Reported by janbar)
34405 - Make the NodeFamilies config option work. (Reported by
34406 lodger -- it has never actually worked, even though we added it
34408 - Check return values from pthread_mutex functions.
34409 - Don't save non-general-purpose router descriptors to the disk cache,
34410 because we have no way of remembering what their purpose was when
34412 - Add even more asserts to hunt down bug 417.
34413 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
34414 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
34415 Add a log message to confirm that it is in fact unlikely.
34417 o Minor bugfixes (controller):
34418 - Make 'getinfo fingerprint' return a 551 error if we're not a
34419 server, so we match what the control spec claims we do. Reported
34421 - Fix a typo in an error message when extendcircuit fails that
34422 caused us to not follow the \r\n-based delimiter protocol. Reported
34425 o Code simplifications and refactoring:
34426 - Stop passing around circuit_t and crypt_path_t pointers that are
34427 implicit in other procedure arguments.
34428 - Drop the old code to choke directory connections when the
34429 corresponding OR connections got full: thanks to the cell queue
34430 feature, OR conns don't get full any more.
34431 - Make dns_resolve() handle attaching connections to circuits
34432 properly, so the caller doesn't have to.
34433 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
34434 - Keep the connection array as a dynamic smartlist_t, rather than as
34435 a fixed-sized array. This is important, as the number of connections
34436 is becoming increasingly decoupled from the number of sockets.
34439 Changes in version 0.1.2.14 - 2007-05-25
34440 Tor 0.1.2.14 changes the addresses of two directory authorities (this
34441 change especially affects those who serve or use hidden services),
34442 and fixes several other crash- and security-related bugs.
34444 o Directory authority changes:
34445 - Two directory authorities (moria1 and moria2) just moved to new
34446 IP addresses. This change will particularly affect those who serve
34447 or use hidden services.
34449 o Major bugfixes (crashes):
34450 - If a directory server runs out of space in the connection table
34451 as it's processing a begin_dir request, it will free the exit stream
34452 but leave it attached to the circuit, leading to unpredictable
34453 behavior. (Reported by seeess, fixes bug 425.)
34454 - Fix a bug in dirserv_remove_invalid() that would cause authorities
34455 to corrupt memory under some really unlikely scenarios.
34456 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
34457 - Avoid segfaults when reading from mmaped descriptor file. (Reported
34460 o Major bugfixes (security):
34461 - When choosing an entry guard for a circuit, avoid using guards
34462 that are in the same family as the chosen exit -- not just guards
34463 that are exactly the chosen exit. (Reported by lodger.)
34465 o Major bugfixes (resource management):
34466 - If a directory authority is down, skip it when deciding where to get
34467 networkstatus objects or descriptors. Otherwise we keep asking
34468 every 10 seconds forever. Fixes bug 384.
34469 - Count it as a failure if we fetch a valid network-status but we
34470 don't want to keep it. Otherwise we'll keep fetching it and keep
34471 not wanting to keep it. Fixes part of bug 422.
34472 - If all of our dirservers have given us bad or no networkstatuses
34473 lately, then stop hammering them once per minute even when we
34474 think they're failed. Fixes another part of bug 422.
34477 - Actually set the purpose correctly for descriptors inserted with
34478 purpose=controller.
34479 - When we have k non-v2 authorities in our DirServer config,
34480 we ignored the last k authorities in the list when updating our
34482 - Correctly back-off from requesting router descriptors that we are
34483 having a hard time downloading.
34484 - Read resolv.conf files correctly on platforms where read() returns
34485 partial results on small file reads.
34486 - Don't rebuild the entire router store every time we get 32K of
34487 routers: rebuild it when the journal gets very large, or when
34488 the gaps in the store get very large.
34491 - When routers publish SVN revisions in their router descriptors,
34492 authorities now include those versions correctly in networkstatus
34494 - Warn when using a version of libevent before 1.3b to run a server on
34495 OSX or BSD: these versions interact badly with userspace threads.
34498 Changes in version 0.1.2.13 - 2007-04-24
34499 This release features some major anonymity fixes, such as safer path
34500 selection; better client performance; faster bootstrapping, better
34501 address detection, and better DNS support for servers; write limiting as
34502 well as read limiting to make servers easier to run; and a huge pile of
34503 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
34505 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
34506 of the Freenode IRC network, remembering his patience and vision for
34507 free speech on the Internet.
34510 - Fix a memory leak when we ask for "all" networkstatuses and we
34511 get one we don't recognize.
34512 - Add more asserts to hunt down bug 417.
34513 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
34516 Changes in version 0.1.2.12-rc - 2007-03-16
34518 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
34519 directory information requested inside Tor connections (i.e. via
34520 begin_dir cells). It only triggered when the same connection was
34521 serving other data at the same time. Reported by seeess.
34524 - When creating a circuit via the controller, send a 'launched'
34525 event when we're done, so we follow the spec better.
34528 Changes in version 0.1.2.11-rc - 2007-03-15
34529 o Minor bugfixes (controller), reported by daejees:
34530 - Correct the control spec to match how the code actually responds
34531 to 'getinfo addr-mappings/*'.
34532 - The control spec described a GUARDS event, but the code
34533 implemented a GUARD event. Standardize on GUARD, but let people
34534 ask for GUARDS too.
34537 Changes in version 0.1.2.10-rc - 2007-03-07
34538 o Major bugfixes (Windows):
34539 - Do not load the NT services library functions (which may not exist)
34540 just to detect if we're a service trying to shut down. Now we run
34541 on Win98 and friends again.
34543 o Minor bugfixes (other):
34544 - Clarify a couple of log messages.
34545 - Fix a misleading socks5 error number.
34548 Changes in version 0.1.2.9-rc - 2007-03-02
34549 o Major bugfixes (Windows):
34550 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
34551 of the usual GCC "%llu". This prevents a bug when saving 64-bit
34552 int configuration values: the high-order 32 bits would get
34553 truncated. In particular, we were being bitten by the default
34554 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
34555 and maybe also bug 397.)
34557 o Minor bugfixes (performance):
34558 - Use OpenSSL's AES implementation on platforms where it's faster.
34559 This could save us as much as 10% CPU usage.
34561 o Minor bugfixes (server):
34562 - Do not rotate onion key immediately after setting it for the first
34565 o Minor bugfixes (directory authorities):
34566 - Stop calling servers that have been hibernating for a long time
34567 "stable". Also, stop letting hibernating or obsolete servers affect
34568 uptime and bandwidth cutoffs.
34569 - Stop listing hibernating servers in the v1 directory.
34571 o Minor bugfixes (hidden services):
34572 - Upload hidden service descriptors slightly less often, to reduce
34573 load on authorities.
34575 o Minor bugfixes (other):
34576 - Fix an assert that could trigger if a controller quickly set then
34577 cleared EntryNodes. Bug found by Udo van den Heuvel.
34578 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
34580 - Fix a potential race condition in the rpm installer. Found by
34582 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
34583 of 2 as indicating that the server is completely bad; it sometimes
34584 means that the server is just bad for the request in question. (may fix
34585 the last of bug 326.)
34586 - Disable encrypted directory connections when we don't have a server
34587 descriptor for the destination. We'll get this working again in
34591 Changes in version 0.1.2.8-beta - 2007-02-26
34592 o Major bugfixes (crashes):
34593 - Stop crashing when the controller asks us to resetconf more than
34594 one config option at once. (Vidalia 0.0.11 does this.)
34595 - Fix a crash that happened on Win98 when we're given command-line
34596 arguments: don't try to load NT service functions from advapi32.dll
34597 except when we need them. (Bug introduced in 0.1.2.7-alpha;
34599 - Fix a longstanding obscure crash bug that could occur when
34600 we run out of DNS worker processes. (Resolves bug 390.)
34602 o Major bugfixes (hidden services):
34603 - Correctly detect whether hidden service descriptor downloads are
34604 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
34606 o Major bugfixes (accounting):
34607 - When we start during an accounting interval before it's time to wake
34608 up, remember to wake up at the correct time. (May fix bug 342.)
34610 o Minor bugfixes (controller):
34611 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
34612 clear the corresponding on_circuit variable, and remember later
34613 that we don't need to send a redundant CLOSED event. Resolves part
34615 - Report events where a resolve succeeded or where we got a socks
34616 protocol error correctly, rather than calling both of them
34618 - Change reported stream target addresses to IP consistently when
34619 we finally get the IP from an exit node.
34620 - Send log messages to the controller even if they happen to be very
34623 o Minor bugfixes (other):
34624 - Display correct results when reporting which versions are
34625 recommended, and how recommended they are. (Resolves bug 383.)
34626 - Improve our estimates for directory bandwidth to be less random:
34627 guess that an unrecognized directory will have the average bandwidth
34628 from all known directories, not that it will have the average
34629 bandwidth from those directories earlier than it on the list.
34630 - If we start a server with ClientOnly 1, then set ClientOnly to 0
34631 and hup, stop triggering an assert based on an empty onion_key.
34632 - On platforms with no working mmap() equivalent, don't warn the
34633 user when cached-routers doesn't exist.
34634 - Warn the user when mmap() [or its equivalent] fails for some reason
34635 other than file-not-found.
34636 - Don't warn the user when cached-routers.new doesn't exist: that's
34637 perfectly fine when starting up for the first time.
34638 - When EntryNodes are configured, rebuild the guard list to contain,
34639 in order: the EntryNodes that were guards before; the rest of the
34640 EntryNodes; the nodes that were guards before.
34641 - Mask out all signals in sub-threads; only the libevent signal
34642 handler should be processing them. This should prevent some crashes
34643 on some machines using pthreads. (Patch from coderman.)
34644 - Fix switched arguments on memset in the implementation of
34645 tor_munmap() for systems with no mmap() call.
34646 - When Tor receives a router descriptor that it asked for, but
34647 no longer wants (because it has received fresh networkstatuses
34648 in the meantime), do not warn the user. Cache the descriptor if
34649 we're a cache; drop it if we aren't.
34650 - Make earlier entry guards _really_ get retried when the network
34652 - On a malformed DNS reply, always give an error to the corresponding
34654 - Build with recent libevents on platforms that do not define the
34655 nonstandard types "u_int8_t" and friends.
34657 o Minor features (controller):
34658 - Warn the user when an application uses the obsolete binary v0
34659 control protocol. We're planning to remove support for it during
34660 the next development series, so it's good to give people some
34662 - Add STREAM_BW events to report per-entry-stream bandwidth
34663 use. (Patch from Robert Hogan.)
34664 - Rate-limit SIGNEWNYM signals in response to controllers that
34665 impolitely generate them for every single stream. (Patch from
34666 mwenge; closes bug 394.)
34667 - Make REMAP stream events have a SOURCE (cache or exit), and
34668 make them generated in every case where we get a successful
34669 connected or resolved cell.
34671 o Minor bugfixes (performance):
34672 - Call router_have_min_dir_info half as often. (This is showing up in
34673 some profiles, but not others.)
34674 - When using GCC, make log_debug never get called at all, and its
34675 arguments never get evaluated, when no debug logs are configured.
34676 (This is showing up in some profiles, but not others.)
34679 - Remove some never-implemented options. Mark PathlenCoinWeight as
34681 - Implement proposal 106: Stop requiring clients to have well-formed
34682 certificates; stop checking nicknames in certificates. (Clients
34683 have certificates so that they can look like Tor servers, but in
34684 the future we might want to allow them to look like regular TLS
34685 clients instead. Nicknames in certificates serve no purpose other
34686 than making our protocol easier to recognize on the wire.)
34687 - Revise messages on handshake failure again to be even more clear about
34688 which are incoming connections and which are outgoing.
34689 - Discard any v1 directory info that's over 1 month old (for
34690 directories) or over 1 week old (for running-routers lists).
34691 - Do not warn when individual nodes in the configuration's EntryNodes,
34692 ExitNodes, etc are down: warn only when all possible nodes
34693 are down. (Fixes bug 348.)
34694 - Always remove expired routers and networkstatus docs before checking
34695 whether we have enough information to build circuits. (Fixes
34697 - Put a lower-bound on MaxAdvertisedBandwidth.
34700 Changes in version 0.1.2.7-alpha - 2007-02-06
34701 o Major bugfixes (rate limiting):
34702 - Servers decline directory requests much more aggressively when
34703 they're low on bandwidth. Otherwise they end up queueing more and
34704 more directory responses, which can't be good for latency.
34705 - But never refuse directory requests from local addresses.
34706 - Fix a memory leak when sending a 503 response for a networkstatus
34708 - Be willing to read or write on local connections (e.g. controller
34709 connections) even when the global rate limiting buckets are empty.
34710 - If our system clock jumps back in time, don't publish a negative
34711 uptime in the descriptor. Also, don't let the global rate limiting
34712 buckets go absurdly negative.
34713 - Flush local controller connection buffers periodically as we're
34714 writing to them, so we avoid queueing 4+ megabytes of data before
34717 o Major bugfixes (NT services):
34718 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
34719 command-line flag so that admins can override the default by saying
34720 "tor --service install --user "SomeUser"". This will not affect
34721 existing installed services. Also, warn the user that the service
34722 will look for its configuration file in the service user's
34723 %appdata% directory. (We can't do the 'hardwire the user's appdata
34724 directory' trick any more, since we may not have read access to that
34727 o Major bugfixes (other):
34728 - Previously, we would cache up to 16 old networkstatus documents
34729 indefinitely, if they came from nontrusted authorities. Now we
34730 discard them if they are more than 10 days old.
34731 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
34733 - Detect and reject malformed DNS responses containing circular
34735 - If exits are rare enough that we're not marking exits as guards,
34736 ignore exit bandwidth when we're deciding the required bandwidth
34738 - When we're handling a directory connection tunneled over Tor,
34739 don't fill up internal memory buffers with all the data we want
34740 to tunnel; instead, only add it if the OR connection that will
34741 eventually receive it has some room for it. (This can lead to
34742 slowdowns in tunneled dir connections; a better solution will have
34743 to wait for 0.2.0.)
34745 o Minor bugfixes (dns):
34746 - Add some defensive programming to eventdns.c in an attempt to catch
34747 possible memory-stomping bugs.
34748 - Detect and reject DNS replies containing IPv4 or IPv6 records with
34749 an incorrect number of bytes. (Previously, we would ignore the
34751 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
34752 in the correct order, and doesn't crash.
34753 - Free memory held in recently-completed DNS lookup attempts on exit.
34754 This was not a memory leak, but may have been hiding memory leaks.
34755 - Handle TTL values correctly on reverse DNS lookups.
34756 - Treat failure to parse resolv.conf as an error.
34758 o Minor bugfixes (other):
34759 - Fix crash with "tor --list-fingerprint" (reported by seeess).
34760 - When computing clock skew from directory HTTP headers, consider what
34761 time it was when we finished asking for the directory, not what
34763 - Expire socks connections if they spend too long waiting for the
34764 handshake to finish. Previously we would let them sit around for
34765 days, if the connecting application didn't close them either.
34766 - And if the socks handshake hasn't started, don't send a
34767 "DNS resolve socks failed" handshake reply; just close it.
34768 - Stop using C functions that OpenBSD's linker doesn't like.
34769 - Don't launch requests for descriptors unless we have networkstatuses
34770 from at least half of the authorities. This delays the first
34771 download slightly under pathological circumstances, but can prevent
34772 us from downloading a bunch of descriptors we don't need.
34773 - Do not log IPs with TLS failures for incoming TLS
34774 connections. (Fixes bug 382.)
34775 - If the user asks to use invalid exit nodes, be willing to use
34777 - Stop using the reserved ac_cv namespace in our configure script.
34778 - Call stat() slightly less often; use fstat() when possible.
34779 - Refactor the way we handle pending circuits when an OR connection
34780 completes or fails, in an attempt to fix a rare crash bug.
34781 - Only rewrite a conn's address based on X-Forwarded-For: headers
34782 if it's a parseable public IP address; and stop adding extra quotes
34783 to the resulting address.
34786 - Weight directory requests by advertised bandwidth. Now we can
34787 let servers enable write limiting but still allow most clients to
34788 succeed at their directory requests. (We still ignore weights when
34789 choosing a directory authority; I hope this is a feature.)
34792 - Create a new file ReleaseNotes which was the old ChangeLog. The
34793 new ChangeLog file now includes the summaries for all development
34795 - Check for addresses with invalid characters at the exit as well
34796 as at the client, and warn less verbosely when they fail. You can
34797 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
34798 - Adapt a patch from goodell to let the contrib/exitlist script
34799 take arguments rather than require direct editing.
34800 - Inform the server operator when we decide not to advertise a
34801 DirPort due to AccountingMax enabled or a low BandwidthRate. It
34802 was confusing Zax, so now we're hopefully more helpful.
34803 - Bring us one step closer to being able to establish an encrypted
34804 directory tunnel without knowing a descriptor first. Still not
34805 ready yet. As part of the change, now assume we can use a
34806 create_fast cell if we don't know anything about a router.
34807 - Allow exit nodes to use nameservers running on ports other than 53.
34808 - Servers now cache reverse DNS replies.
34809 - Add an --ignore-missing-torrc command-line option so that we can
34810 get the "use sensible defaults if the configuration file doesn't
34811 exist" behavior even when specifying a torrc location on the command
34814 o Minor features (controller):
34815 - Track reasons for OR connection failure; make these reasons
34816 available via the controller interface. (Patch from Mike Perry.)
34817 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
34818 can learn when clients are sending malformed hostnames to Tor.
34819 - Clean up documentation for controller status events.
34820 - Add a REMAP status to stream events to note that a stream's
34821 address has changed because of a cached address or a MapAddress
34825 Changes in version 0.1.2.6-alpha - 2007-01-09
34827 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
34828 connection handles more than 4 gigs in either direction, we crash.
34829 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
34830 advertised exit node, somebody might try to exit from us when
34831 we're bootstrapping and before we've built our descriptor yet.
34832 Refuse the connection rather than crashing.
34835 - Warn if we (as a server) find that we've resolved an address that we
34836 weren't planning to resolve.
34837 - Warn that using select() on any libevent version before 1.1 will be
34838 unnecessarily slow (even for select()).
34839 - Flush ERR-level controller status events just like we currently
34840 flush ERR-level log events, so that a Tor shutdown doesn't prevent
34841 the controller from learning about current events.
34843 o Minor features (more controller status events):
34844 - Implement EXTERNAL_ADDRESS server status event so controllers can
34845 learn when our address changes.
34846 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
34847 can learn when directories reject our descriptor.
34848 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
34849 can learn when a client application is speaking a non-socks protocol
34851 - Implement DANGEROUS_SOCKS client status event so controllers
34852 can learn when a client application is leaking DNS addresses.
34853 - Implement BUG general status event so controllers can learn when
34854 Tor is unhappy about its internal invariants.
34855 - Implement CLOCK_SKEW general status event so controllers can learn
34856 when Tor thinks the system clock is set incorrectly.
34857 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
34858 server status events so controllers can learn when their descriptors
34859 are accepted by a directory.
34860 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
34861 server status events so controllers can learn about Tor's progress in
34862 deciding whether it's reachable from the outside.
34863 - Implement BAD_LIBEVENT general status event so controllers can learn
34864 when we have a version/method combination in libevent that needs to
34866 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
34867 and DNS_USELESS server status events so controllers can learn
34868 about changes to DNS server status.
34870 o Minor features (directory):
34871 - Authorities no longer recommend exits as guards if this would shift
34872 too much load to the exit nodes.
34875 Changes in version 0.1.2.5-alpha - 2007-01-06
34877 - Enable write limiting as well as read limiting. Now we sacrifice
34878 capacity if we're pushing out lots of directory traffic, rather
34879 than overrunning the user's intended bandwidth limits.
34880 - Include TLS overhead when counting bandwidth usage; previously, we
34881 would count only the bytes sent over TLS, but not the bytes used
34883 - Support running the Tor service with a torrc not in the same
34884 directory as tor.exe and default to using the torrc located in
34885 the %appdata%\Tor\ of the user who installed the service. Patch
34887 - Servers now check for the case when common DNS requests are going to
34888 wildcarded addresses (i.e. all getting the same answer), and change
34889 their exit policy to reject *:* if it's happening.
34890 - Implement BEGIN_DIR cells, so we can connect to the directory
34891 server via TLS to do encrypted directory requests rather than
34892 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
34893 config options if you like.
34895 o Minor features (config and docs):
34896 - Start using the state file to store bandwidth accounting data:
34897 the bw_accounting file is now obsolete. We'll keep generating it
34898 for a while for people who are still using 0.1.2.4-alpha.
34899 - Try to batch changes to the state file so that we do as few
34900 disk writes as possible while still storing important things in
34902 - The state file and the bw_accounting file get saved less often when
34903 the AvoidDiskWrites config option is set.
34904 - Make PIDFile work on Windows (untested).
34905 - Add internal descriptions for a bunch of configuration options:
34906 accessible via controller interface and in comments in saved
34908 - Reject *:563 (NNTPS) in the default exit policy. We already reject
34909 NNTP by default, so this seems like a sensible addition.
34910 - Clients now reject hostnames with invalid characters. This should
34911 avoid some inadvertent info leaks. Add an option
34912 AllowNonRFC953Hostnames to disable this behavior, in case somebody
34913 is running a private network with hosts called @, !, and #.
34914 - Add a maintainer script to tell us which options are missing
34915 documentation: "make check-docs".
34916 - Add a new address-spec.txt document to describe our special-case
34917 addresses: .exit, .onion, and .noconnnect.
34919 o Minor features (DNS):
34920 - Ongoing work on eventdns infrastructure: now it has dns server
34921 and ipv6 support. One day Tor will make use of it.
34922 - Add client-side caching for reverse DNS lookups.
34923 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
34924 - When we change nameservers or IP addresses, reset and re-launch
34925 our tests for DNS hijacking.
34927 o Minor features (directory):
34928 - Authorities now specify server versions in networkstatus. This adds
34929 about 2% to the size of compressed networkstatus docs, and allows
34930 clients to tell which servers support BEGIN_DIR and which don't.
34931 The implementation is forward-compatible with a proposed future
34932 protocol version scheme not tied to Tor versions.
34933 - DirServer configuration lines now have an orport= option so
34934 clients can open encrypted tunnels to the authorities without
34935 having downloaded their descriptors yet. Enabled for moria1,
34936 moria2, tor26, and lefkada now in the default configuration.
34937 - Directory servers are more willing to send a 503 "busy" if they
34938 are near their write limit, especially for v1 directory requests.
34939 Now they can use their limited bandwidth for actual Tor traffic.
34940 - Clients track responses with status 503 from dirservers. After a
34941 dirserver has given us a 503, we try not to use it until an hour has
34942 gone by, or until we have no dirservers that haven't given us a 503.
34943 - When we get a 503 from a directory, and we're not a server, we don't
34944 count the failure against the total number of failures allowed
34945 for the thing we're trying to download.
34946 - Report X-Your-Address-Is correctly from tunneled directory
34947 connections; don't report X-Your-Address-Is when it's an internal
34948 address; and never believe reported remote addresses when they're
34950 - Protect against an unlikely DoS attack on directory servers.
34951 - Add a BadDirectory flag to network status docs so that authorities
34952 can (eventually) tell clients about caches they believe to be
34955 o Minor features (controller):
34956 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
34957 - Reimplement GETINFO so that info/names stays in sync with the
34959 - Implement "GETINFO fingerprint".
34960 - Implement "SETEVENTS GUARD" so controllers can get updates on
34961 entry guard status as it changes.
34963 o Minor features (clean up obsolete pieces):
34964 - Remove some options that have been deprecated since at least
34965 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
34966 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
34967 to set log options.
34968 - We no longer look for identity and onion keys in "identity.key" and
34969 "onion.key" -- these were replaced by secret_id_key and
34970 secret_onion_key in 0.0.8pre1.
34971 - We no longer require unrecognized directory entries to be
34974 o Major bugfixes (security):
34975 - Stop sending the HttpProxyAuthenticator string to directory
34976 servers when directory connections are tunnelled through Tor.
34977 - Clients no longer store bandwidth history in the state file.
34978 - Do not log introduction points for hidden services if SafeLogging
34980 - When generating bandwidth history, round down to the nearest
34981 1k. When storing accounting data, round up to the nearest 1k.
34982 - When we're running as a server, remember when we last rotated onion
34983 keys, so that we will rotate keys once they're a week old even if
34984 we never stay up for a week ourselves.
34986 o Major bugfixes (other):
34987 - Fix a longstanding bug in eventdns that prevented the count of
34988 timed-out resolves from ever being reset. This bug caused us to
34989 give up on a nameserver the third time it timed out, and try it
34990 10 seconds later... and to give up on it every time it timed out
34992 - Take out the '5 second' timeout from the connection retry
34993 schedule. Now the first connect attempt will wait a full 10
34994 seconds before switching to a new circuit. Perhaps this will help
34995 a lot. Based on observations from Mike Perry.
34996 - Fix a bug on the Windows implementation of tor_mmap_file() that
34997 would prevent the cached-routers file from ever loading. Reported
35001 - Fix an assert failure when a directory authority sets
35002 AuthDirRejectUnlisted and then receives a descriptor from an
35003 unlisted router. Reported by seeess.
35004 - Avoid a double-free when parsing malformed DirServer lines.
35005 - Fix a bug when a BSD-style PF socket is first used. Patch from
35007 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
35008 to resolve an address at a given exit node even when they ask for
35010 - Servers no longer ever list themselves in their "family" line,
35011 even if configured to do so. This makes it easier to configure
35012 family lists conveniently.
35013 - When running as a server, don't fall back to 127.0.0.1 when no
35014 nameservers are configured in /etc/resolv.conf; instead, make the
35015 user fix resolv.conf or specify nameservers explicitly. (Resolves
35017 - Stop accepting certain malformed ports in configured exit policies.
35018 - Don't re-write the fingerprint file every restart, unless it has
35020 - Stop warning when a single nameserver fails: only warn when _all_ of
35021 our nameservers have failed. Also, when we only have one nameserver,
35022 raise the threshold for deciding that the nameserver is dead.
35023 - Directory authorities now only decide that routers are reachable
35024 if their identity keys are as expected.
35025 - When the user uses bad syntax in the Log config line, stop
35026 suggesting other bad syntax as a replacement.
35027 - Correctly detect ipv6 DNS capability on OpenBSD.
35029 o Minor bugfixes (controller):
35030 - Report the circuit number correctly in STREAM CLOSED events. Bug
35031 reported by Mike Perry.
35032 - Do not report bizarre values for results of accounting GETINFOs
35033 when the last second's write or read exceeds the allotted bandwidth.
35034 - Report "unrecognized key" rather than an empty string when the
35035 controller tries to fetch a networkstatus that doesn't exist.
35038 Changes in version 0.1.1.26 - 2006-12-14
35039 o Security bugfixes:
35040 - Stop sending the HttpProxyAuthenticator string to directory
35041 servers when directory connections are tunnelled through Tor.
35042 - Clients no longer store bandwidth history in the state file.
35043 - Do not log introduction points for hidden services if SafeLogging
35047 - Fix an assert failure when a directory authority sets
35048 AuthDirRejectUnlisted and then receives a descriptor from an
35049 unlisted router (reported by seeess).
35052 Changes in version 0.1.2.4-alpha - 2006-12-03
35054 - Add support for using natd; this allows FreeBSDs earlier than
35055 5.1.2 to have ipfw send connections through Tor without using
35056 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
35059 - Make all connections to addresses of the form ".noconnect"
35060 immediately get closed. This lets application/controller combos
35061 successfully test whether they're talking to the same Tor by
35062 watching for STREAM events.
35063 - Make cross.sh cross-compilation script work even when autogen.sh
35064 hasn't been run. (Patch from Michael Mohr.)
35065 - Statistics dumped by -USR2 now include a breakdown of public key
35066 operations, for profiling.
35069 - Fix a major leak when directory authorities parse their
35070 approved-routers list, a minor memory leak when we fail to pick
35071 an exit node, and a few rare leaks on errors.
35072 - Handle TransPort connections even when the server sends data before
35073 the client sends data. Previously, the connection would just hang
35074 until the client sent data. (Patch from tup based on patch from
35076 - Avoid assert failure when our cached-routers file is empty on
35080 - Don't log spurious warnings when we see a circuit close reason we
35081 don't recognize; it's probably just from a newer version of Tor.
35082 - Have directory authorities allow larger amounts of drift in uptime
35083 without replacing the server descriptor: previously, a server that
35084 restarted every 30 minutes could have 48 "interesting" descriptors
35086 - Start linking to the Tor specification and Tor reference manual
35087 correctly in the Windows installer.
35088 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35089 Tor/Privoxy we also uninstall Vidalia.
35090 - Resume building on Irix64, and fix a lot of warnings from its
35091 MIPSpro C compiler.
35092 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
35093 when we're running as a client.
35096 Changes in version 0.1.1.25 - 2006-11-04
35098 - When a client asks us to resolve (rather than connect to)
35099 an address, and we have a cached answer, give them the cached
35100 answer. Previously, we would give them no answer at all.
35101 - We were building exactly the wrong circuits when we predict
35102 hidden service requirements, meaning Tor would have to build all
35103 its circuits on demand.
35104 - If none of our live entry guards have a high uptime, but we
35105 require a guard with a high uptime, try adding a new guard before
35106 we give up on the requirement. This patch should make long-lived
35107 connections more stable on average.
35108 - When testing reachability of our DirPort, don't launch new
35109 tests when there's already one in progress -- unreachable
35110 servers were stacking up dozens of testing streams.
35112 o Security bugfixes:
35113 - When the user sends a NEWNYM signal, clear the client-side DNS
35114 cache too. Otherwise we continue to act on previous information.
35117 - Avoid a memory corruption bug when creating a hash table for
35119 - Avoid possibility of controller-triggered crash when misusing
35120 certain commands from a v0 controller on platforms that do not
35121 handle printf("%s",NULL) gracefully.
35122 - Avoid infinite loop on unexpected controller input.
35123 - Don't log spurious warnings when we see a circuit close reason we
35124 don't recognize; it's probably just from a newer version of Tor.
35125 - Add Vidalia to the OS X uninstaller script, so when we uninstall
35126 Tor/Privoxy we also uninstall Vidalia.
35129 Changes in version 0.1.2.3-alpha - 2006-10-29
35131 - Prepare for servers to publish descriptors less often: never
35132 discard a descriptor simply for being too old until either it is
35133 recommended by no authorities, or until we get a better one for
35134 the same router. Make caches consider retaining old recommended
35135 routers for even longer.
35136 - If most authorities set a BadExit flag for a server, clients
35137 don't think of it as a general-purpose exit. Clients only consider
35138 authorities that advertise themselves as listing bad exits.
35139 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
35140 headers for content, so that we can work better in the presence of
35141 caching HTTP proxies.
35142 - Allow authorities to list nodes as bad exits by fingerprint or by
35145 o Minor features, controller:
35146 - Add a REASON field to CIRC events; for backward compatibility, this
35147 field is sent only to controllers that have enabled the extended
35148 event format. Also, add additional reason codes to explain why
35149 a given circuit has been destroyed or truncated. (Patches from
35151 - Add a REMOTE_REASON field to extended CIRC events to tell the
35152 controller about why a remote OR told us to close a circuit.
35153 - Stream events also now have REASON and REMOTE_REASON fields,
35154 working much like those for circuit events.
35155 - There's now a GETINFO ns/... field so that controllers can ask Tor
35156 about the current status of a router.
35157 - A new event type "NS" to inform a controller when our opinion of
35158 a router's status has changed.
35159 - Add a GETINFO events/names and GETINFO features/names so controllers
35160 can tell which events and features are supported.
35161 - A new CLEARDNSCACHE signal to allow controllers to clear the
35162 client-side DNS cache without expiring circuits.
35164 o Security bugfixes:
35165 - When the user sends a NEWNYM signal, clear the client-side DNS
35166 cache too. Otherwise we continue to act on previous information.
35169 - Avoid sending junk to controllers or segfaulting when a controller
35170 uses EVENT_NEW_DESC with verbose nicknames.
35171 - Stop triggering asserts if the controller tries to extend hidden
35172 service circuits (reported by mwenge).
35173 - Avoid infinite loop on unexpected controller input.
35174 - When the controller does a "GETINFO network-status", tell it
35175 about even those routers whose descriptors are very old, and use
35176 long nicknames where appropriate.
35177 - Change NT service functions to be loaded on demand. This lets us
35178 build with MinGW without breaking Tor for Windows 98 users.
35179 - Do DirPort reachability tests less often, since a single test
35180 chews through many circuits before giving up.
35181 - In the hidden service example in torrc.sample, stop recommending
35182 esoteric and discouraged hidden service options.
35183 - When stopping an NT service, wait up to 10 sec for it to actually
35184 stop. Patch from Matt Edman; resolves bug 295.
35185 - Fix handling of verbose nicknames with ORCONN controller events:
35186 make them show up exactly when requested, rather than exactly when
35188 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
35189 printing a duplicate "$" in the keys we send (reported by mwenge).
35190 - Correctly set maximum connection limit on Cygwin. (This time
35192 - Try to detect Windows correctly when cross-compiling.
35193 - Detect the size of the routers file correctly even if it is
35194 corrupted (on systems without mmap) or not page-aligned (on systems
35195 with mmap). This bug was harmless.
35196 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
35197 to open a stream fails; now we do in more cases. This should
35198 make clients able to find a good exit faster in some cases, since
35199 unhandleable requests will now get an error rather than timing out.
35200 - Resolve two memory leaks when rebuilding the on-disk router cache
35201 (reported by fookoowa).
35202 - Clean up minor code warnings suggested by the MIPSpro C compiler,
35203 and reported by some Centos users.
35204 - Controller signals now work on non-Unix platforms that don't define
35205 SIGUSR1 and SIGUSR2 the way we expect.
35206 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
35207 values before failing, and always enables eventdns.
35208 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
35209 Try to fix this in configure.in by checking for most functions
35210 before we check for libevent.
35213 Changes in version 0.1.2.2-alpha - 2006-10-07
35215 - Make our async eventdns library on-by-default for Tor servers,
35216 and plan to deprecate the separate dnsworker threads.
35217 - Add server-side support for "reverse" DNS lookups (using PTR
35218 records so clients can determine the canonical hostname for a given
35219 IPv4 address). Only supported by servers using eventdns; servers
35220 now announce in their descriptors whether they support eventdns.
35221 - Specify and implement client-side SOCKS5 interface for reverse DNS
35222 lookups (see doc/socks-extensions.txt).
35223 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
35224 connect to directory servers through Tor. Previously, clients needed
35225 to find Tor exits to make private connections to directory servers.
35226 - Avoid choosing Exit nodes for entry or middle hops when the
35227 total bandwidth available from non-Exit nodes is much higher than
35228 the total bandwidth available from Exit nodes.
35229 - Workaround for name servers (like Earthlink's) that hijack failing
35230 DNS requests and replace the no-such-server answer with a "helpful"
35231 redirect to an advertising-driven search portal. Also work around
35232 DNS hijackers who "helpfully" decline to hijack known-invalid
35233 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
35234 lets you turn it off.
35235 - Send out a burst of long-range padding cells once we've established
35236 that we're reachable. Spread them over 4 circuits, so hopefully
35237 a few will be fast. This exercises our bandwidth and bootstraps
35238 us into the directory more quickly.
35240 o New/improved config options:
35241 - Add new config option "ResolvConf" to let the server operator
35242 choose an alternate resolve.conf file when using eventdns.
35243 - Add an "EnforceDistinctSubnets" option to control our "exclude
35244 servers on the same /16" behavior. It's still on by default; this
35245 is mostly for people who want to operate private test networks with
35246 all the machines on the same subnet.
35247 - If one of our entry guards is on the ExcludeNodes list, or the
35248 directory authorities don't think it's a good guard, treat it as
35249 if it were unlisted: stop using it as a guard, and throw it off
35250 the guards list if it stays that way for a long time.
35251 - Allow directory authorities to be marked separately as authorities
35252 for the v1 directory protocol, the v2 directory protocol, and
35253 as hidden service directories, to make it easier to retire old
35254 authorities. V1 authorities should set "HSAuthoritativeDir 1"
35255 to continue being hidden service authorities too.
35256 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
35258 o Minor features, controller:
35259 - Fix CIRC controller events so that controllers can learn the
35260 identity digests of non-Named servers used in circuit paths.
35261 - Let controllers ask for more useful identifiers for servers. Instead
35262 of learning identity digests for un-Named servers and nicknames
35263 for Named servers, the new identifiers include digest, nickname,
35264 and indication of Named status. Off by default; see control-spec.txt
35265 for more information.
35266 - Add a "getinfo address" controller command so it can display Tor's
35267 best guess to the user.
35268 - New controller event to alert the controller when our server
35269 descriptor has changed.
35270 - Give more meaningful errors on controller authentication failure.
35272 o Minor features, other:
35273 - When asked to resolve a hostname, don't use non-exit servers unless
35274 requested to do so. This allows servers with broken DNS to be
35275 useful to the network.
35276 - Divide eventdns log messages into warn and info messages.
35277 - Reserve the nickname "Unnamed" for routers that can't pick
35278 a hostname: any router can call itself Unnamed; directory
35279 authorities will never allocate Unnamed to any particular router;
35280 clients won't believe that any router is the canonical Unnamed.
35281 - Only include function names in log messages for info/debug messages.
35282 For notice/warn/err, the content of the message should be clear on
35283 its own, and printing the function name only confuses users.
35284 - Avoid some false positives during reachability testing: don't try
35285 to test via a server that's on the same /24 as us.
35286 - If we fail to build a circuit to an intended enclave, and it's
35287 not mandatory that we use that enclave, stop wanting it.
35288 - When eventdns is enabled, allow multithreaded builds on NetBSD and
35289 OpenBSD. (We had previously disabled threads on these platforms
35290 because they didn't have working thread-safe resolver functions.)
35292 o Major bugfixes, anonymity/security:
35293 - If a client asked for a server by name, and there's a named server
35294 in our network-status but we don't have its descriptor yet, we
35295 could return an unnamed server instead.
35296 - Fix NetBSD bug that could allow someone to force uninitialized RAM
35297 to be sent to a server's DNS resolver. This only affects NetBSD
35298 and other platforms that do not bounds-check tolower().
35299 - Reject (most) attempts to use Tor circuits with length one. (If
35300 many people start using Tor as a one-hop proxy, exit nodes become
35301 a more attractive target for compromise.)
35302 - Just because your DirPort is open doesn't mean people should be
35303 able to remotely teach you about hidden service descriptors. Now
35304 only accept rendezvous posts if you've got HSAuthoritativeDir set.
35306 o Major bugfixes, other:
35307 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
35308 - When a client asks the server to resolve (not connect to)
35309 an address, and it has a cached answer, give them the cached answer.
35310 Previously, the server would give them no answer at all.
35311 - Allow really slow clients to not hang up five minutes into their
35312 directory downloads (suggested by Adam J. Richter).
35313 - We were building exactly the wrong circuits when we anticipated
35314 hidden service requirements, meaning Tor would have to build all
35315 its circuits on demand.
35316 - Avoid crashing when we mmap a router cache file of size 0.
35317 - When testing reachability of our DirPort, don't launch new
35318 tests when there's already one in progress -- unreachable
35319 servers were stacking up dozens of testing streams.
35321 o Minor bugfixes, correctness:
35322 - If we're a directory mirror and we ask for "all" network status
35323 documents, we would discard status documents from authorities
35324 we don't recognize.
35325 - Avoid a memory corruption bug when creating a hash table for
35327 - Avoid controller-triggered crash when misusing certain commands
35328 from a v0 controller on platforms that do not handle
35329 printf("%s",NULL) gracefully.
35330 - Don't crash when a controller sends a third argument to an
35331 "extendcircuit" request.
35332 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35333 response; fix error code when "getinfo dir/status/" fails.
35334 - Avoid crash when telling controller stream-status and a stream
35336 - Patch from Adam Langley to fix assert() in eventdns.c.
35337 - Fix a debug log message in eventdns to say "X resolved to Y"
35338 instead of "X resolved to X".
35339 - Make eventdns give strings for DNS errors, not just error numbers.
35340 - Track unreachable entry guards correctly: don't conflate
35341 'unreachable by us right now' with 'listed as down by the directory
35342 authorities'. With the old code, if a guard was unreachable by
35343 us but listed as running, it would clog our guard list forever.
35344 - Behave correctly in case we ever have a network with more than
35345 2GB/s total advertised capacity.
35346 - Make TrackExitHosts case-insensitive, and fix the behavior of
35347 ".suffix" TrackExitHosts items to avoid matching in the middle of
35349 - Finally fix the openssl warnings from newer gccs that believe that
35350 ignoring a return value is okay, but casting a return value and
35351 then ignoring it is a sign of madness.
35352 - Prevent the contrib/exitlist script from printing the same
35353 result more than once.
35354 - Patch from Steve Hildrey: Generate network status correctly on
35355 non-versioning dirservers.
35356 - Don't listen to the X-Your-Address-Is hint if you did the lookup
35357 via Tor; otherwise you'll think you're the exit node's IP address.
35359 o Minor bugfixes, performance:
35360 - Two small performance improvements on parsing descriptors.
35361 - Major performance improvement on inserting descriptors: change
35362 algorithm from O(n^2) to O(n).
35363 - Make the common memory allocation path faster on machines where
35364 malloc(0) returns a pointer.
35365 - Start remembering X-Your-Address-Is directory hints even if you're
35366 a client, so you can become a server more smoothly.
35367 - Avoid duplicate entries on MyFamily line in server descriptor.
35369 o Packaging, features:
35370 - Remove architecture from OS X builds. The official builds are
35371 now universal binaries.
35372 - The Debian package now uses --verify-config when (re)starting,
35373 to distinguish configuration errors from other errors.
35374 - Update RPMs to require libevent 1.1b.
35376 o Packaging, bugfixes:
35377 - Patches so Tor builds with MinGW on Windows.
35378 - Patches so Tor might run on Cygwin again.
35379 - Resume building on non-gcc compilers and ancient gcc. Resume
35380 building with the -O0 compile flag. Resume building cleanly on
35382 - Run correctly on OS X platforms with case-sensitive filesystems.
35383 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
35384 - Add autoconf checks so Tor can build on Solaris x86 again.
35387 - Documented (and renamed) ServerDNSSearchDomains and
35388 ServerDNSResolvConfFile options.
35389 - Be clearer that the *ListenAddress directives can be repeated
35393 Changes in version 0.1.1.24 - 2006-09-29
35395 - Allow really slow clients to not hang up five minutes into their
35396 directory downloads (suggested by Adam J. Richter).
35397 - Fix major performance regression from 0.1.0.x: instead of checking
35398 whether we have enough directory information every time we want to
35399 do something, only check when the directory information has changed.
35400 This should improve client CPU usage by 25-50%.
35401 - Don't crash if, after a server has been running for a while,
35402 it can't resolve its hostname.
35405 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35406 - Don't crash when the controller receives a third argument to an
35407 "extendcircuit" request.
35408 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
35409 response; fix error code when "getinfo dir/status/" fails.
35410 - Fix configure.in to not produce broken configure files with
35411 more recent versions of autoconf. Thanks to Clint for his auto*
35413 - Fix security bug on NetBSD that could allow someone to force
35414 uninitialized RAM to be sent to a server's DNS resolver. This
35415 only affects NetBSD and other platforms that do not bounds-check
35417 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
35418 methods: these are known to be buggy.
35419 - If we're a directory mirror and we ask for "all" network status
35420 documents, we would discard status documents from authorities
35421 we don't recognize.
35424 Changes in version 0.1.2.1-alpha - 2006-08-27
35426 - Add "eventdns" async dns library from Adam Langley, tweaked to
35427 build on OSX and Windows. Only enabled if you pass the
35428 --enable-eventdns argument to configure.
35429 - Allow servers with no hostname or IP address to learn their
35430 IP address by asking the directory authorities. This code only
35431 kicks in when you would normally have exited with a "no address"
35432 error. Nothing's authenticated, so use with care.
35433 - Rather than waiting a fixed amount of time between retrying
35434 application connections, we wait only 5 seconds for the first,
35435 10 seconds for the second, and 15 seconds for each retry after
35436 that. Hopefully this will improve the expected user experience.
35437 - Patch from Tup to add support for transparent AP connections:
35438 this basically bundles the functionality of trans-proxy-tor
35439 into the Tor mainline. Now hosts with compliant pf/netfilter
35440 implementations can redirect TCP connections straight to Tor
35441 without diverting through SOCKS. Needs docs.
35442 - Busy directory servers save lots of memory by spooling server
35443 descriptors, v1 directories, and v2 networkstatus docs to buffers
35444 as needed rather than en masse. Also mmap the cached-routers
35445 files, so we don't need to keep the whole thing in memory too.
35446 - Automatically avoid picking more than one node from the same
35447 /16 network when constructing a circuit.
35448 - Revise and clean up the torrc.sample that we ship with; add
35449 a section for BandwidthRate and BandwidthBurst.
35452 - Split circuit_t into origin_circuit_t and or_circuit_t, and
35453 split connection_t into edge, or, dir, control, and base structs.
35454 These will save quite a bit of memory on busy servers, and they'll
35455 also help us track down bugs in the code and bugs in the spec.
35456 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
35457 or later. Log when we are doing this, so we can diagnose it when
35458 it fails. (Also, recommend libevent 1.1b for kqueue and
35459 win32 methods; deprecate libevent 1.0b harder; make libevent
35460 recommendation system saner.)
35461 - Start being able to build universal binaries on OS X (thanks
35463 - Export the default exit policy via the control port, so controllers
35464 don't need to guess what it is / will be later.
35465 - Add a man page entry for ProtocolWarnings.
35466 - Add TestVia config option to the man page.
35467 - Remove even more protocol-related warnings from Tor server logs,
35468 such as bad TLS handshakes and malformed begin cells.
35469 - Stop fetching descriptors if you're not a dir mirror and you
35470 haven't tried to establish any circuits lately. [This currently
35471 causes some dangerous behavior, because when you start up again
35472 you'll use your ancient server descriptors.]
35473 - New DirPort behavior: if you have your dirport set, you download
35474 descriptors aggressively like a directory mirror, whether or not
35475 your ORPort is set.
35476 - Get rid of the router_retry_connections notion. Now routers
35477 no longer try to rebuild long-term connections to directory
35478 authorities, and directory authorities no longer try to rebuild
35479 long-term connections to all servers. We still don't hang up
35480 connections in these two cases though -- we need to look at it
35481 more carefully to avoid flapping, and we likely need to wait til
35482 0.1.1.x is obsolete.
35483 - Drop compatibility with obsolete Tors that permit create cells
35484 to have the wrong circ_id_type.
35485 - Re-enable per-connection rate limiting. Get rid of the "OP
35486 bandwidth" concept. Lay groundwork for "bandwidth classes" --
35487 separate global buckets that apply depending on what sort of conn
35489 - Start publishing one minute or so after we find our ORPort
35490 to be reachable. This will help reduce the number of descriptors
35491 we have for ourselves floating around, since it's quite likely
35492 other things (e.g. DirPort) will change during that minute too.
35493 - Fork the v1 directory protocol into its own spec document,
35494 and mark dir-spec.txt as the currently correct (v2) spec.
35497 - When we find our DirPort to be reachable, publish a new descriptor
35498 so we'll tell the world (reported by pnx).
35499 - Publish a new descriptor after we hup/reload. This is important
35500 if our config has changed such that we'll want to start advertising
35501 our DirPort now, etc.
35502 - Allow Tor to start when RunAsDaemon is set but no logs are set.
35503 - When we have a state file we cannot parse, tell the user and
35504 move it aside. Now we avoid situations where the user starts
35505 Tor in 1904, Tor writes a state file with that timestamp in it,
35506 the user fixes her clock, and Tor refuses to start.
35507 - Fix configure.in to not produce broken configure files with
35508 more recent versions of autoconf. Thanks to Clint for his auto*
35510 - "tor --verify-config" now exits with -1(255) or 0 depending on
35511 whether the config options are bad or good.
35512 - Resolve bug 321 when using dnsworkers: append a period to every
35513 address we resolve at the exit node, so that we do not accidentally
35514 pick up local addresses, and so that failing searches are retried
35515 in the resolver search domains. (This is already solved for
35516 eventdns.) (This breaks Blossom servers for now.)
35517 - If we are using an exit enclave and we can't connect, e.g. because
35518 its webserver is misconfigured to not listen on localhost, then
35519 back off and try connecting from somewhere else before we fail.
35522 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
35523 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
35524 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
35525 when the IP address is mapped through MapAddress to a hostname.
35526 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
35527 useless IPv6 DNS resolves.
35528 - Patch suggested by Karsten Loesing: respond to SIGNAL command
35529 before we execute the signal, in case the signal shuts us down.
35530 - Clean up AllowInvalidNodes man page entry.
35531 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
35532 - Add more asserts to track down an assert error on a windows Tor
35533 server with connection_add being called with socket == -1.
35534 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
35535 - Fix misleading log messages: an entry guard that is "unlisted",
35536 as well as not known to be "down" (because we've never heard
35537 of it), is not therefore "up".
35538 - Remove code to special-case "-cvs" ending, since it has not
35539 actually mattered since 0.0.9.
35540 - Make our socks5 handling more robust to broken socks clients:
35541 throw out everything waiting on the buffer in between socks
35542 handshake phases, since they can't possibly (so the theory
35543 goes) have predicted what we plan to respond to them.
35546 Changes in version 0.1.1.23 - 2006-07-30
35548 - Fast Tor servers, especially exit nodes, were triggering asserts
35549 due to a bug in handling the list of pending DNS resolves. Some
35550 bugs still remain here; we're hunting them.
35551 - Entry guards could crash clients by sending unexpected input.
35552 - More fixes on reachability testing: if you find yourself reachable,
35553 then don't ever make any client requests (so you stop predicting
35554 circuits), then hup or have your clock jump, then later your IP
35555 changes, you won't think circuits are working, so you won't try to
35556 test reachability, so you won't publish.
35559 - Avoid a crash if the controller does a resetconf firewallports
35560 and then a setconf fascistfirewall=1.
35561 - Avoid an integer underflow when the dir authority decides whether
35562 a router is stable: we might wrongly label it stable, and compute
35563 a slightly wrong median stability, when a descriptor is published
35565 - Fix a place where we might trigger an assert if we can't build our
35566 own server descriptor yet.
35569 Changes in version 0.1.1.22 - 2006-07-05
35571 - Fix a big bug that was causing servers to not find themselves
35572 reachable if they changed IP addresses. Since only 0.1.1.22+
35573 servers can do reachability testing correctly, now we automatically
35574 make sure to test via one of these.
35575 - Fix to allow clients and mirrors to learn directory info from
35576 descriptor downloads that get cut off partway through.
35577 - Directory authorities had a bug in deciding if a newly published
35578 descriptor was novel enough to make everybody want a copy -- a few
35579 servers seem to be publishing new descriptors many times a minute.
35581 - Fix a rare bug that was causing some servers to complain about
35582 "closing wedged cpuworkers" and skip some circuit create requests.
35583 - Make the Exit flag in directory status documents actually work.
35586 Changes in version 0.1.1.21 - 2006-06-10
35587 o Crash and assert fixes from 0.1.1.20:
35588 - Fix a rare crash on Tor servers that have enabled hibernation.
35589 - Fix a seg fault on startup for Tor networks that use only one
35590 directory authority.
35591 - Fix an assert from a race condition that occurs on Tor servers
35592 while exiting, where various threads are trying to log that they're
35593 exiting, and delete the logs, at the same time.
35594 - Make our unit tests pass again on certain obscure platforms.
35597 - Add support for building SUSE RPM packages.
35598 - Speed up initial bootstrapping for clients: if we are making our
35599 first ever connection to any entry guard, then don't mark it down
35601 - When only one Tor server in the network is labelled as a guard,
35602 and we've already picked him, we would cycle endlessly picking him
35603 again, being unhappy about it, etc. Now we specifically exclude
35604 current guards when picking a new guard.
35605 - Servers send create cells more reliably after the TLS connection
35606 is established: we were sometimes forgetting to send half of them
35607 when we had more than one pending.
35608 - If we get a create cell that asks us to extend somewhere, but the
35609 Tor server there doesn't match the expected digest, we now send
35610 a destroy cell back, rather than silently doing nothing.
35611 - Make options->RedirectExit work again.
35612 - Make cookie authentication for the controller work again.
35613 - Stop being picky about unusual characters in the arguments to
35614 mapaddress. It's none of our business.
35615 - Add a new config option "TestVia" that lets you specify preferred
35616 middle hops to use for test circuits. Perhaps this will let me
35617 debug the reachability problems better.
35619 o Log / documentation fixes:
35620 - If we're a server and some peer has a broken TLS certificate, don't
35621 log about it unless ProtocolWarnings is set, i.e., we want to hear
35622 about protocol violations by others.
35623 - Fix spelling of VirtualAddrNetwork in man page.
35624 - Add a better explanation at the top of the autogenerated torrc file
35625 about what happened to our old torrc.
35628 Changes in version 0.1.1.20 - 2006-05-23
35630 - Downgrade a log severity where servers complain that they're
35632 - Avoid a compile warning on FreeBSD.
35633 - Remove string size limit on NEWDESC messages; solve bug 291.
35634 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
35635 more thoroughly when we're running on windows.
35638 Changes in version 0.1.1.19-rc - 2006-05-03
35640 - Regenerate our local descriptor if it's dirty and we try to use
35641 it locally (e.g. if it changes during reachability detection).
35642 - If we setconf our ORPort to 0, we continued to listen on the
35643 old ORPort and receive connections.
35644 - Avoid a second warning about machine/limits.h on Debian
35646 - Be willing to add our own routerinfo into the routerlist.
35647 Now authorities will include themselves in their directories
35648 and network-statuses.
35649 - Stop trying to upload rendezvous descriptors to every
35650 directory authority: only try the v1 authorities.
35651 - Servers no longer complain when they think they're not
35652 registered with the directory authorities. There were too many
35654 - Backport dist-rpm changes so rpms can be built without errors.
35657 - Implement an option, VirtualAddrMask, to set which addresses
35658 get handed out in response to mapaddress requests. This works
35659 around a bug in tsocks where 127.0.0.0/8 is never socksified.
35662 Changes in version 0.1.1.18-rc - 2006-04-10
35664 - Work harder to download live network-statuses from all the
35665 directory authorities we know about. Improve the threshold
35666 decision logic so we're more robust to edge cases.
35667 - When fetching rendezvous descriptors, we were willing to ask
35668 v2 authorities too, which would always return 404.
35671 - Stop listing down or invalid nodes in the v1 directory. This will
35672 reduce its bulk by about 1/3, and reduce load on directory
35674 - When deciding whether a router is Fast or Guard-worthy, consider
35675 his advertised BandwidthRate and not just the BandwidthCapacity.
35676 - No longer ship INSTALL and README files -- they are useless now.
35677 - Force rpmbuild to behave and honor target_cpu.
35678 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
35679 - Start to include translated versions of the tor-doc-*.html
35680 files, along with the screenshots. Still needs more work.
35681 - Start sending back 512 and 451 errors if mapaddress fails,
35682 rather than not sending anything back at all.
35683 - When we fail to bind or listen on an incoming or outgoing
35684 socket, we should close it before failing. otherwise we just
35685 leak it. (thanks to weasel for finding.)
35686 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
35687 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
35688 - Make NoPublish (even though deprecated) work again.
35689 - Fix a minor security flaw where a versioning auth dirserver
35690 could list a recommended version many times in a row to make
35691 clients more convinced that it's recommended.
35692 - Fix crash bug if there are two unregistered servers running
35693 with the same nickname, one of them is down, and you ask for
35694 them by nickname in your EntryNodes or ExitNodes. Also, try
35695 to pick the one that's running rather than an arbitrary one.
35696 - Fix an infinite loop we could hit if we go offline for too long.
35697 - Complain when we hit WSAENOBUFS on recv() or write() too.
35698 Perhaps this will help us hunt the bug.
35699 - If you're not a versioning dirserver, don't put the string
35700 "client-versions \nserver-versions \n" in your network-status.
35701 - Lower the minimum required number of file descriptors to 1000,
35702 so we can have some overhead for Valgrind on Linux, where the
35703 default ulimit -n is 1024.
35706 - Add tor.dizum.com as the fifth authoritative directory server.
35707 - Add a new config option FetchUselessDescriptors, off by default,
35708 for when you plan to run "exitlist" on your client and you want
35709 to know about even the non-running descriptors.
35712 Changes in version 0.1.1.17-rc - 2006-03-28
35714 - Clients and servers since 0.1.1.10-alpha have been expiring
35715 connections whenever they are idle for 5 minutes and they *do*
35716 have circuits on them. Oops. With this new version, clients will
35717 discard their previous entry guard choices and avoid choosing
35718 entry guards running these flawed versions.
35719 - Fix memory leak when uncompressing concatenated zlib streams. This
35720 was causing substantial leaks over time on Tor servers.
35721 - The v1 directory was including servers as much as 48 hours old,
35722 because that's how the new routerlist->routers works. Now only
35723 include them if they're 20 hours old or less.
35726 - Resume building on irix64, netbsd 2.0, etc.
35727 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
35729 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
35730 and it is confusing some users.
35731 - Mirrors stop caching the v1 directory so often.
35732 - Make the max number of old descriptors that a cache will hold
35733 rise with the number of directory authorities, so we can scale.
35734 - Change our win32 uname() hack to be more forgiving about what
35735 win32 versions it thinks it's found.
35738 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
35740 - When the controller's *setconf commands fail, collect an error
35741 message in a string and hand it back to the controller.
35742 - Make the v2 dir's "Fast" flag based on relative capacity, just
35743 like "Stable" is based on median uptime. Name everything in the
35744 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
35745 - Log server fingerprint on startup, so new server operators don't
35746 have to go hunting around their filesystem for it.
35747 - Return a robots.txt on our dirport to discourage google indexing.
35748 - Let the controller ask for GETINFO dir/status/foo so it can ask
35749 directly rather than connecting to the dir port. Only works when
35750 dirport is set for now.
35752 o New config options rather than constants in the code:
35753 - SocksTimeout: How long do we let a socks connection wait
35754 unattached before we fail it?
35755 - CircuitBuildTimeout: Cull non-open circuits that were born
35756 at least this many seconds ago.
35757 - CircuitIdleTimeout: Cull open clean circuits that were born
35758 at least this many seconds ago.
35761 Changes in version 0.1.1.16-rc - 2006-03-18
35762 o Bugfixes on 0.1.1.15-rc:
35763 - Fix assert when the controller asks to attachstream a connect-wait
35764 or resolve-wait stream.
35765 - Now do address rewriting when the controller asks us to attach
35766 to a particular circuit too. This will let Blossom specify
35767 "moria2.exit" without having to learn what moria2's IP address is.
35768 - Make the "tor --verify-config" command-line work again, so people
35769 can automatically check if their torrc will parse.
35770 - Authoritative dirservers no longer require an open connection from
35771 a server to consider him "reachable". We need this change because
35772 when we add new auth dirservers, old servers won't know not to
35774 - Let Tor build on Sun CC again.
35775 - Fix an off-by-one buffer size in dirserv.c that magically never
35776 hit our three authorities but broke sjmurdoch's own tor network.
35777 - If we as a directory mirror don't know of any v1 directory
35778 authorities, then don't try to cache any v1 directories.
35779 - Stop warning about unknown servers in our family when they are
35780 given as hex digests.
35781 - Stop complaining as quickly to the server operator that he
35782 hasn't registered his nickname/key binding.
35783 - Various cleanups so we can add new V2 Auth Dirservers.
35784 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
35785 reflect the updated flags in our v2 dir protocol.
35786 - Resume allowing non-printable characters for exit streams (both
35787 for connecting and for resolving). Now we tolerate applications
35788 that don't follow the RFCs. But continue to block malformed names
35791 o Bugfixes on 0.1.0.x:
35792 - Fix assert bug in close_logs(): when we close and delete logs,
35793 remove them all from the global "logfiles" list.
35794 - Fix minor integer overflow in calculating when we expect to use up
35795 our bandwidth allocation before hibernating.
35796 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
35797 there are multiple SSLs installed with different versions.
35798 - When we try to be a server and Address is not explicitly set and
35799 our hostname resolves to a private IP address, try to use an
35800 interface address if it has a public address. Now Windows machines
35801 that think of themselves as localhost can work by default.
35804 - Let the controller ask for GETINFO dir/server/foo so it can ask
35805 directly rather than connecting to the dir port.
35806 - Let the controller tell us about certain router descriptors
35807 that it doesn't want Tor to use in circuits. Implement
35808 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
35809 - New config option SafeSocks to reject all application connections
35810 using unsafe socks protocols. Defaults to off.
35813 Changes in version 0.1.1.15-rc - 2006-03-11
35814 o Bugfixes and cleanups:
35815 - When we're printing strings from the network, don't try to print
35816 non-printable characters. This protects us against shell escape
35817 sequence exploits, and also against attacks to fool humans into
35818 misreading their logs.
35819 - Fix a bug where Tor would fail to establish any connections if you
35820 left it off for 24 hours and then started it: we were happy with
35821 the obsolete network statuses, but they all referred to router
35822 descriptors that were too old to fetch, so we ended up with no
35823 valid router descriptors.
35824 - Fix a seg fault in the controller's "getinfo orconn-status"
35825 command while listing status on incoming handshaking connections.
35826 Introduce a status name "NEW" for these connections.
35827 - If we get a linelist or linelist_s config option from the torrc
35828 (e.g. ExitPolicy) and it has no value, warn and skip rather than
35829 silently resetting it to its default.
35830 - Don't abandon entry guards until they've been down or gone for
35832 - Cleaner and quieter log messages.
35835 - New controller signal NEWNYM that makes new application requests
35836 use clean circuits.
35837 - Add a new circuit purpose 'controller' to let the controller ask
35838 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
35839 controller command to let you specify the purpose if you're
35840 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
35841 command to let you change a circuit's purpose after it's been
35843 - Accept "private:*" in routerdesc exit policies; not generated yet
35844 because older Tors do not understand it.
35845 - Add BSD-style contributed startup script "rc.subr" from Peter
35849 Changes in version 0.1.1.14-alpha - 2006-02-20
35850 o Bugfixes on 0.1.1.x:
35851 - Don't die if we ask for a stdout or stderr log (even implicitly)
35852 and we're set to RunAsDaemon -- just warn.
35853 - We still had a few bugs in the OR connection rotation code that
35854 caused directory servers to slowly aggregate connections to other
35855 fast Tor servers. This time for sure!
35856 - Make log entries on Win32 include the name of the function again.
35857 - We were treating a pair of exit policies if they were equal even
35858 if one said accept and the other said reject -- causing us to
35859 not always publish a new descriptor since we thought nothing
35861 - Retry pending server downloads as well as pending networkstatus
35862 downloads when we unexpectedly get a socks request.
35863 - We were ignoring the IS_FAST flag in the directory status,
35864 meaning we were willing to pick trivial-bandwidth nodes for "fast"
35866 - If the controller's SAVECONF command fails (e.g. due to file
35867 permissions), let the controller know that it failed.
35870 - If we're trying to be a Tor server and running Windows 95/98/ME
35871 as a server, explain that we'll likely crash.
35872 - When we're a server, a client asks for an old-style directory,
35873 and our write bucket is empty, don't give it to him. This way
35874 small servers can continue to serve the directory *sometimes*,
35875 without getting overloaded.
35876 - Compress exit policies even more -- look for duplicate lines
35878 - Clients now honor the "guard" flag in the router status when
35879 picking entry guards, rather than looking at is_fast or is_stable.
35880 - Retain unrecognized lines in $DATADIR/state file, so that we can
35881 be forward-compatible.
35882 - Generate 18.0.0.0/8 address policy format in descs when we can;
35883 warn when the mask is not reducible to a bit-prefix.
35884 - Let the user set ControlListenAddress in the torrc. This can be
35885 dangerous, but there are some cases (like a secured LAN) where it
35887 - Split ReachableAddresses into ReachableDirAddresses and
35888 ReachableORAddresses, so we can restrict Dir conns to port 80
35889 and OR conns to port 443.
35890 - Now we can target arch and OS in rpm builds (contributed by
35891 Phobos). Also make the resulting dist-rpm filename match the
35893 - New config options to help controllers: FetchServerDescriptors
35894 and FetchHidServDescriptors for whether to fetch server
35895 info and hidserv info or let the controller do it, and
35896 PublishServerDescriptor and PublishHidServDescriptors.
35897 - Also let the controller set the __AllDirActionsPrivate config
35898 option if you want all directory fetches/publishes to happen via
35899 Tor (it assumes your controller bootstraps your circuits).
35902 Changes in version 0.1.0.17 - 2006-02-17
35903 o Crash bugfixes on 0.1.0.x:
35904 - When servers with a non-zero DirPort came out of hibernation,
35905 sometimes they would trigger an assert.
35907 o Other important bugfixes:
35908 - On platforms that don't have getrlimit (like Windows), we were
35909 artificially constraining ourselves to a max of 1024
35910 connections. Now just assume that we can handle as many as 15000
35911 connections. Hopefully this won't cause other problems.
35913 o Backported features:
35914 - When we're a server, a client asks for an old-style directory,
35915 and our write bucket is empty, don't give it to him. This way
35916 small servers can continue to serve the directory *sometimes*,
35917 without getting overloaded.
35918 - Whenever you get a 503 in response to a directory fetch, try
35919 once more. This will become important once servers start sending
35920 503's whenever they feel busy.
35921 - Fetch a new directory every 120 minutes, not every 40 minutes.
35922 Now that we have hundreds of thousands of users running the old
35923 directory algorithm, it's starting to hurt a lot.
35924 - Bump up the period for forcing a hidden service descriptor upload
35925 from 20 minutes to 1 hour.
35928 Changes in version 0.1.1.13-alpha - 2006-02-09
35929 o Crashes in 0.1.1.x:
35930 - When you tried to setconf ORPort via the controller, Tor would
35931 crash. So people using TorCP to become a server were sad.
35932 - Solve (I hope) the stack-smashing bug that we were seeing on fast
35933 servers. The problem appears to be something do with OpenSSL's
35934 random number generation, or how we call it, or something. Let me
35935 know if the crashes continue.
35936 - Turn crypto hardware acceleration off by default, until we find
35937 somebody smart who can test it for us. (It appears to produce
35938 seg faults in at least some cases.)
35939 - Fix a rare assert error when we've tried all intro points for
35940 a hidden service and we try fetching the service descriptor again:
35941 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
35944 - Fix a major load balance bug: we were round-robining in 16 KB
35945 chunks, and servers with bandwidthrate of 20 KB, while downloading
35946 a 600 KB directory, would starve their other connections. Now we
35947 try to be a bit more fair.
35948 - Dir authorities and mirrors were never expiring the newest
35949 descriptor for each server, causing memory and directory bloat.
35950 - Fix memory-bloating and connection-bloating bug on servers: We
35951 were never closing any connection that had ever had a circuit on
35952 it, because we were checking conn->n_circuits == 0, yet we had a
35953 bug that let it go negative.
35954 - Make Tor work using squid as your http proxy again -- squid
35955 returns an error if you ask for a URL that's too long, and it uses
35956 a really generic error message. Plus, many people are behind a
35957 transparent squid so they don't even realize it.
35958 - On platforms that don't have getrlimit (like Windows), we were
35959 artificially constraining ourselves to a max of 1024
35960 connections. Now just assume that we can handle as many as 15000
35961 connections. Hopefully this won't cause other problems.
35962 - Add a new config option ExitPolicyRejectPrivate which defaults to
35963 1. This means all exit policies will begin with rejecting private
35964 addresses, unless the server operator explicitly turns it off.
35967 - Clients no longer download descriptors for non-running
35969 - Before we add new directory authorities, we should make it
35970 clear that only v1 authorities should receive/publish hidden
35971 service descriptors.
35974 - As soon as we've fetched some more directory info, immediately
35975 try to download more server descriptors. This way we don't have
35976 a 10 second pause during initial bootstrapping.
35977 - Remove even more loud log messages that the server operator can't
35979 - When we're running an obsolete or un-recommended version, make
35980 the log message more clear about what the problem is and what
35981 versions *are* still recommended.
35982 - Provide a more useful warn message when our onion queue gets full:
35983 the CPU is too slow or the exit policy is too liberal.
35984 - Don't warn when we receive a 503 from a dirserver/cache -- this
35985 will pave the way for them being able to refuse if they're busy.
35986 - When we fail to bind a listener, try to provide a more useful
35987 log message: e.g., "Is Tor already running?"
35988 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
35989 Goldberg can prove things about our handshake protocol more
35991 - MaxConn has been obsolete for a while now. Document the ConnLimit
35992 config option, which is a *minimum* number of file descriptors
35993 that must be available else Tor refuses to start.
35994 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
35995 if you log to syslog and want something other than LOG_DAEMON.
35996 - Make dirservers generate a separate "guard" flag to mean,
35997 "would make a good entry guard". Make clients parse it and vote
35998 on it. Not used by clients yet.
35999 - Implement --with-libevent-dir option to ./configure. Also, improve
36000 search techniques to find libevent, and use those for openssl too.
36001 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
36002 - Only start testing reachability once we've established a
36003 circuit. This will make startup on dirservers less noisy.
36004 - Don't try to upload hidden service descriptors until we have
36005 established a circuit.
36006 - Fix the controller's "attachstream 0" command to treat conn like
36007 it just connected, doing address remapping, handling .exit and
36008 .onion idioms, and so on. Now we're more uniform in making sure
36009 that the controller hears about new and closing connections.
36012 Changes in version 0.1.1.12-alpha - 2006-01-11
36013 o Bugfixes on 0.1.1.x:
36014 - The fix to close duplicate server connections was closing all
36015 Tor client connections if they didn't establish a circuit
36016 quickly enough. Oops.
36017 - Fix minor memory issue (double-free) that happened on exit.
36019 o Bugfixes on 0.1.0.x:
36020 - Tor didn't warn when it failed to open a log file.
36023 Changes in version 0.1.1.11-alpha - 2006-01-10
36024 o Crashes in 0.1.1.x:
36025 - Include all the assert/crash fixes from 0.1.0.16.
36026 - If you start Tor and then quit very quickly, there were some
36027 races that tried to free things that weren't allocated yet.
36028 - Fix a rare memory stomp if you're running hidden services.
36029 - Fix segfault when specifying DirServer in config without nickname.
36030 - Fix a seg fault when you finish connecting to a server but at
36031 that moment you dump his server descriptor.
36032 - Extendcircuit and Attachstream controller commands would
36033 assert/crash if you don't give them enough arguments.
36034 - Fix an assert error when we're out of space in the connection_list
36035 and we try to post a hidden service descriptor (reported by weasel).
36036 - If you specify a relative torrc path and you set RunAsDaemon in
36037 your torrc, then it chdir()'s to the new directory. If you HUP,
36038 it tries to load the new torrc location, fails, and exits.
36039 The fix: no longer allow a relative path to torrc using -f.
36042 - Implement "entry guards": automatically choose a handful of entry
36043 nodes and stick with them for all circuits. Only pick new guards
36044 when the ones you have are unsuitable, and if the old guards
36045 become suitable again, switch back. This will increase security
36046 dramatically against certain end-point attacks. The EntryNodes
36047 config option now provides some hints about which entry guards you
36048 want to use most; and StrictEntryNodes means to only use those.
36049 - New directory logic: download by descriptor digest, not by
36050 fingerprint. Caches try to download all listed digests from
36051 authorities; clients try to download "best" digests from caches.
36052 This avoids partitioning and isolating attacks better.
36053 - Make the "stable" router flag in network-status be the median of
36054 the uptimes of running valid servers, and make clients pay
36055 attention to the network-status flags. Thus the cutoff adapts
36056 to the stability of the network as a whole, making IRC, IM, etc
36057 connections more reliable.
36060 - Tor servers with dynamic IP addresses were needing to wait 18
36061 hours before they could start doing reachability testing using
36062 the new IP address and ports. This is because they were using
36063 the internal descriptor to learn what to test, yet they were only
36064 rebuilding the descriptor once they decided they were reachable.
36065 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
36066 to download certain server descriptors, throw them away, and then
36067 fetch them again after 30 minutes. Now mirrors throw away these
36068 server descriptors so clients can't get them.
36069 - We were leaving duplicate connections to other ORs open for a week,
36070 rather than closing them once we detect a duplicate. This only
36071 really affected authdirservers, but it affected them a lot.
36072 - Spread the authdirservers' reachability testing over the entire
36073 testing interval, so we don't try to do 500 TLS's at once every
36077 - If the network is down, and we try to connect to a conn because
36078 we have a circuit in mind, and we timeout (30 seconds) because the
36079 network never answers, we were expiring the circuit, but we weren't
36080 obsoleting the connection or telling the entry_guards functions.
36081 - Some Tor servers process billions of cells per day. These statistics
36082 need to be uint64_t's.
36083 - Check for integer overflows in more places, when adding elements
36084 to smartlists. This could possibly prevent a buffer overflow
36085 on malicious huge inputs. I don't see any, but I haven't looked
36087 - ReachableAddresses kept growing new "reject *:*" lines on every
36089 - When you "setconf log" via the controller, it should remove all
36090 logs. We were automatically adding back in a "log notice stdout".
36091 - Newly bootstrapped Tor networks couldn't establish hidden service
36092 circuits until they had nodes with high uptime. Be more tolerant.
36093 - We were marking servers down when they could not answer every piece
36094 of the directory request we sent them. This was far too harsh.
36095 - Fix the torify (tsocks) config file to not use Tor for localhost
36097 - Directory authorities now go to the proper authority when asking for
36098 a networkstatus, even when they want a compressed one.
36099 - Fix a harmless bug that was causing Tor servers to log
36100 "Got an end because of misc error, but we're not an AP. Closing."
36101 - Authorities were treating their own descriptor changes as cosmetic,
36102 meaning the descriptor available in the network-status and the
36103 descriptor that clients downloaded were different.
36104 - The OS X installer was adding a symlink for tor_resolve but
36105 the binary was called tor-resolve (reported by Thomas Hardly).
36106 - Workaround a problem with some http proxies where they refuse GET
36107 requests that specify "Content-Length: 0" (reported by Adrian).
36108 - Fix wrong log message when you add a "HiddenServiceNodes" config
36109 line without any HiddenServiceDir line (reported by Chris Thomas).
36112 - Write the TorVersion into the state file so we have a prayer of
36113 keeping forward and backward compatibility.
36114 - Revive the FascistFirewall config option rather than eliminating it:
36115 now it's a synonym for ReachableAddresses *:80,*:443.
36116 - Clients choose directory servers from the network status lists,
36117 not from their internal list of router descriptors. Now they can
36118 go to caches directly rather than needing to go to authorities
36120 - Directory authorities ignore router descriptors that have only
36121 cosmetic differences: do this for 0.1.0.x servers now too.
36122 - Add a new flag to network-status indicating whether the server
36123 can answer v2 directory requests too.
36124 - Authdirs now stop whining so loudly about bad descriptors that
36125 they fetch from other dirservers. So when there's a log complaint,
36126 it's for sure from a freshly uploaded descriptor.
36127 - Reduce memory requirements in our structs by changing the order
36129 - There used to be two ways to specify your listening ports in a
36130 server descriptor: on the "router" line and with a separate "ports"
36131 line. Remove support for the "ports" line.
36132 - New config option "AuthDirRejectUnlisted" for auth dirservers as
36133 a panic button: if we get flooded with unusable servers we can
36134 revert to only listing servers in the approved-routers file.
36135 - Auth dir servers can now mark a fingerprint as "!reject" or
36136 "!invalid" in the approved-routers file (as its nickname), to
36137 refuse descriptors outright or include them but marked as invalid.
36138 - Servers store bandwidth history across restarts/crashes.
36139 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
36140 get a better idea of why their circuits failed. Not used yet.
36141 - Directory mirrors now cache up to 16 unrecognized network-status
36142 docs. Now we can add new authdirservers and they'll be cached too.
36143 - When picking a random directory, prefer non-authorities if any
36145 - New controller option "getinfo desc/all-recent" to fetch the
36146 latest server descriptor for every router that Tor knows about.
36149 Changes in version 0.1.0.16 - 2006-01-02
36150 o Crash bugfixes on 0.1.0.x:
36151 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36152 corrupting the heap, losing FDs, or crashing when we need to resize
36153 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36154 - It turns out sparc64 platforms crash on unaligned memory access
36155 too -- so detect and avoid this.
36156 - Handle truncated compressed data correctly (by detecting it and
36158 - Fix possible-but-unlikely free(NULL) in control.c.
36159 - When we were closing connections, there was a rare case that
36160 stomped on memory, triggering seg faults and asserts.
36161 - Avoid potential infinite recursion when building a descriptor. (We
36162 don't know that it ever happened, but better to fix it anyway.)
36163 - We were neglecting to unlink marked circuits from soon-to-close OR
36164 connections, which caused some rare scribbling on freed memory.
36165 - Fix a memory stomping race bug when closing the joining point of two
36166 rendezvous circuits.
36167 - Fix an assert in time parsing found by Steven Murdoch.
36169 o Other bugfixes on 0.1.0.x:
36170 - When we're doing reachability testing, provide more useful log
36171 messages so the operator knows what to expect.
36172 - Do not check whether DirPort is reachable when we are suppressing
36173 advertising it because of hibernation.
36174 - When building with -static or on Solaris, we sometimes needed -ldl.
36175 - When we're deciding whether a stream has enough circuits around
36176 that can handle it, count the freshly dirty ones and not the ones
36177 that are so dirty they won't be able to handle it.
36178 - When we're expiring old circuits, we had a logic error that caused
36179 us to close new rendezvous circuits rather than old ones.
36180 - Give a more helpful log message when you try to change ORPort via
36181 the controller: you should upgrade Tor if you want that to work.
36182 - We were failing to parse Tor versions that start with "Tor ".
36183 - Tolerate faulty streams better: when a stream fails for reason
36184 exitpolicy, stop assuming that the router is lying about his exit
36185 policy. When a stream fails for reason misc, allow it to retry just
36186 as if it was resolvefailed. When a stream has failed three times,
36187 reset its failure count so we can try again and get all three tries.
36190 Changes in version 0.1.1.10-alpha - 2005-12-11
36191 o Correctness bugfixes on 0.1.0.x:
36192 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
36193 corrupting the heap, losing FDs, or crashing when we need to resize
36194 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
36195 - Stop doing the complex voodoo overkill checking for insecure
36196 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
36197 - When we were closing connections, there was a rare case that
36198 stomped on memory, triggering seg faults and asserts.
36199 - We were neglecting to unlink marked circuits from soon-to-close OR
36200 connections, which caused some rare scribbling on freed memory.
36201 - When we're deciding whether a stream has enough circuits around
36202 that can handle it, count the freshly dirty ones and not the ones
36203 that are so dirty they won't be able to handle it.
36204 - Recover better from TCP connections to Tor servers that are
36205 broken but don't tell you (it happens!); and rotate TLS
36206 connections once a week.
36207 - When we're expiring old circuits, we had a logic error that caused
36208 us to close new rendezvous circuits rather than old ones.
36209 - Fix a scary-looking but apparently harmless bug where circuits
36210 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
36211 servers, and never switch to state CIRCUIT_STATE_OPEN.
36212 - When building with -static or on Solaris, we sometimes needed to
36214 - Give a useful message when people run Tor as the wrong user,
36215 rather than telling them to start chowning random directories.
36216 - We were failing to inform the controller about new .onion streams.
36218 o Security bugfixes on 0.1.0.x:
36219 - Refuse server descriptors if the fingerprint line doesn't match
36220 the included identity key. Tor doesn't care, but other apps (and
36221 humans) might actually be trusting the fingerprint line.
36222 - We used to kill the circuit when we receive a relay command we
36223 don't recognize. Now we just drop it.
36224 - Start obeying our firewall options more rigorously:
36225 . If we can't get to a dirserver directly, try going via Tor.
36226 . Don't ever try to connect (as a client) to a place our
36227 firewall options forbid.
36228 . If we specify a proxy and also firewall options, obey the
36229 firewall options even when we're using the proxy: some proxies
36230 can only proxy to certain destinations.
36231 - Fix a bug found by Lasse Overlier: when we were making internal
36232 circuits (intended to be cannibalized later for rendezvous and
36233 introduction circuits), we were picking them so that they had
36234 useful exit nodes. There was no need for this, and it actually
36235 aids some statistical attacks.
36236 - Start treating internal circuits and exit circuits separately.
36237 It's important to keep them separate because internal circuits
36238 have their last hops picked like middle hops, rather than like
36239 exit hops. So exiting on them will break the user's expectations.
36241 o Bugfixes on 0.1.1.x:
36242 - Take out the mis-feature where we tried to detect IP address
36243 flapping for people with DynDNS, and chose not to upload a new
36244 server descriptor sometimes.
36245 - Try to be compatible with OpenSSL 0.9.6 again.
36246 - Log fix: when the controller is logging about .onion addresses,
36247 sometimes it didn't include the ".onion" part of the address.
36248 - Don't try to modify options->DirServers internally -- if the
36249 user didn't specify any, just add the default ones directly to
36250 the trusted dirserver list. This fixes a bug where people running
36251 controllers would use SETCONF on some totally unrelated config
36252 option, and Tor would start yelling at them about changing their
36254 - Let the controller's redirectstream command specify a port, in
36255 case the controller wants to change that too.
36256 - When we requested a pile of server descriptors, we sometimes
36257 accidentally launched a duplicate request for the first one.
36258 - Bugfix for trackhostexits: write down the fingerprint of the
36259 chosen exit, not its nickname, because the chosen exit might not
36261 - When parsing foo.exit, if foo is unknown, and we are leaving
36262 circuits unattached, set the chosen_exit field and leave the
36263 address empty. This matters because controllers got confused
36265 - Directory authorities no longer try to download server
36266 descriptors that they know they will reject.
36268 o Features and updates:
36269 - Replace balanced trees with hash tables: this should make stuff
36270 significantly faster.
36271 - Resume using the AES counter-mode implementation that we ship,
36272 rather than OpenSSL's. Ours is significantly faster.
36273 - Many other CPU and memory improvements.
36274 - Add a new config option FastFirstHopPK (on by default) so clients
36275 do a trivial crypto handshake for their first hop, since TLS has
36276 already taken care of confidentiality and authentication.
36277 - Add a new config option TestSocks so people can see if their
36278 applications are using socks4, socks4a, socks5-with-ip, or
36279 socks5-with-hostname. This way they don't have to keep mucking
36280 with tcpdump and wondering if something got cached somewhere.
36281 - Warn when listening on a public address for socks. I suspect a
36282 lot of people are setting themselves up as open socks proxies,
36283 and they have no idea that jerks on the Internet are using them,
36284 since they simply proxy the traffic into the Tor network.
36285 - Add "private:*" as an alias in configuration for policies. Now
36286 you can simplify your exit policy rather than needing to list
36287 every single internal or nonroutable network space.
36288 - Add a new controller event type that allows controllers to get
36289 all server descriptors that were uploaded to a router in its role
36290 as authoritative dirserver.
36291 - Start shipping socks-extensions.txt, tor-doc-unix.html,
36292 tor-doc-server.html, and stylesheet.css in the tarball.
36293 - Stop shipping tor-doc.html in the tarball.
36296 Changes in version 0.1.1.9-alpha - 2005-11-15
36297 o Usability improvements:
36298 - Start calling it FooListenAddress rather than FooBindAddress,
36299 since few of our users know what it means to bind an address
36301 - Reduce clutter in server logs. We're going to try to make
36302 them actually usable now. New config option ProtocolWarnings that
36303 lets you hear about how _other Tors_ are breaking the protocol. Off
36305 - Divide log messages into logging domains. Once we put some sort
36306 of interface on this, it will let people looking at more verbose
36307 log levels specify the topics they want to hear more about.
36308 - Make directory servers return better http 404 error messages
36309 instead of a generic "Servers unavailable".
36310 - Check for even more Windows version flags when writing the platform
36311 string in server descriptors, and note any we don't recognize.
36312 - Clean up more of the OpenSSL memory when exiting, so we can detect
36313 memory leaks better.
36314 - Make directory authorities be non-versioning, non-naming by
36315 default. Now we can add new directory servers without requiring
36316 their operators to pay close attention.
36317 - When logging via syslog, include the pid whenever we provide
36318 a log entry. Suggested by Todd Fries.
36320 o Performance improvements:
36321 - Directory servers now silently throw away new descriptors that
36322 haven't changed much if the timestamps are similar. We do this to
36323 tolerate older Tor servers that upload a new descriptor every 15
36324 minutes. (It seemed like a good idea at the time.)
36325 - Inline bottleneck smartlist functions; use fast versions by default.
36326 - Add a "Map from digest to void*" abstraction digestmap_t so we
36327 can do less hex encoding/decoding. Use it in router_get_by_digest()
36328 to resolve a performance bottleneck.
36329 - Allow tor_gzip_uncompress to extract as much as possible from
36330 truncated compressed data. Try to extract as many
36331 descriptors as possible from truncated http responses (when
36332 DIR_PURPOSE_FETCH_ROUTERDESC).
36333 - Make circ->onionskin a pointer, not a static array. moria2 was using
36334 125000 circuit_t's after it had been up for a few weeks, which
36335 translates to 20+ megs of wasted space.
36336 - The private half of our EDH handshake keys are now chosen out
36337 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
36339 o Security improvements:
36340 - Start making directory caches retain old routerinfos, so soon
36341 clients can start asking by digest of descriptor rather than by
36342 fingerprint of server.
36343 - Add half our entropy from RAND_poll in OpenSSL. This knows how
36344 to use egd (if present), openbsd weirdness (if present), vms/os2
36345 weirdness (if we ever port there), and more in the future.
36347 o Bugfixes on 0.1.0.x:
36348 - Do round-robin writes of at most 16 kB per write. This might be
36349 more fair on loaded Tor servers, and it might resolve our Windows
36350 crash bug. It might also slow things down.
36351 - Our TLS handshakes were generating a single public/private
36352 keypair for the TLS context, rather than making a new one for
36353 each new connections. Oops. (But we were still rotating them
36354 periodically, so it's not so bad.)
36355 - When we were cannibalizing a circuit with a particular exit
36356 node in mind, we weren't checking to see if that exit node was
36357 already present earlier in the circuit. Oops.
36358 - When a Tor server's IP changes (e.g. from a dyndns address),
36359 upload a new descriptor so clients will learn too.
36360 - Really busy servers were keeping enough circuits open on stable
36361 connections that they were wrapping around the circuit_id
36362 space. (It's only two bytes.) This exposed a bug where we would
36363 feel free to reuse a circuit_id even if it still exists but has
36364 been marked for close. Try to fix this bug. Some bug remains.
36365 - If we would close a stream early (e.g. it asks for a .exit that
36366 we know would refuse it) but the LeaveStreamsUnattached config
36367 option is set by the controller, then don't close it.
36369 o Bugfixes on 0.1.1.8-alpha:
36370 - Fix a big pile of memory leaks, some of them serious.
36371 - Do not try to download a routerdesc if we would immediately reject
36373 - Resume inserting a newline between all router descriptors when
36374 generating (old style) signed directories, since our spec says
36376 - When providing content-type application/octet-stream for
36377 server descriptors using .z, we were leaving out the
36378 content-encoding header. Oops. (Everything tolerated this just
36379 fine, but that doesn't mean we need to be part of the problem.)
36380 - Fix a potential seg fault in getconf and getinfo using version 1
36381 of the controller protocol.
36382 - Avoid crash: do not check whether DirPort is reachable when we
36383 are suppressing it because of hibernation.
36384 - Make --hash-password not crash on exit.
36387 Changes in version 0.1.1.8-alpha - 2005-10-07
36388 o New features (major):
36389 - Clients don't download or use the directory anymore. Now they
36390 download and use network-statuses from the trusted dirservers,
36391 and fetch individual server descriptors as needed from mirrors.
36392 See dir-spec.txt for all the gory details.
36393 - Be more conservative about whether to advertise our DirPort.
36394 The main change is to not advertise if we're running at capacity
36395 and either a) we could hibernate or b) our capacity is low and
36396 we're using a default DirPort.
36397 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
36399 o New features (minor):
36400 - Try to be smart about when to retry network-status and
36401 server-descriptor fetches. Still needs some tuning.
36402 - Stop parsing, storing, or using running-routers output (but
36403 mirrors still cache and serve it).
36404 - Consider a threshold of versioning dirservers (dirservers who have
36405 an opinion about which Tor versions are still recommended) before
36406 deciding whether to warn the user that he's obsolete.
36407 - Dirservers can now reject/invalidate by key and IP, with the
36408 config options "AuthDirInvalid" and "AuthDirReject". This is
36409 useful since currently we automatically list servers as running
36410 and usable even if we know they're jerks.
36411 - Provide dire warnings to any users who set DirServer; move it out
36412 of torrc.sample and into torrc.complete.
36413 - Add MyFamily to torrc.sample in the server section.
36414 - Add nicknames to the DirServer line, so we can refer to them
36415 without requiring all our users to memorize their IP addresses.
36416 - When we get an EOF or a timeout on a directory connection, note
36417 how many bytes of serverdesc we are dropping. This will help
36418 us determine whether it is smart to parse incomplete serverdesc
36420 - Add a new function to "change pseudonyms" -- that is, to stop
36421 using any currently-dirty circuits for new streams, so we don't
36422 link new actions to old actions. Currently it's only called on
36423 HUP (or SIGNAL RELOAD).
36424 - On sighup, if UseHelperNodes changed to 1, use new circuits.
36425 - Start using RAND_bytes rather than RAND_pseudo_bytes from
36426 OpenSSL. Also, reseed our entropy every hour, not just at
36427 startup. And entropy in 512-bit chunks, not 160-bit chunks.
36429 o Fixes on 0.1.1.7-alpha:
36430 - Nobody ever implemented EVENT_ADDRMAP for control protocol
36431 version 0, so don't let version 0 controllers ask for it.
36432 - If you requested something with too many newlines via the
36433 v1 controller protocol, you could crash tor.
36434 - Fix a number of memory leaks, including some pretty serious ones.
36435 - Re-enable DirPort testing again, so Tor servers will be willing
36436 to advertise their DirPort if it's reachable.
36437 - On TLS handshake, only check the other router's nickname against
36438 its expected nickname if is_named is set.
36440 o Fixes forward-ported from 0.1.0.15:
36441 - Don't crash when we don't have any spare file descriptors and we
36442 try to spawn a dns or cpu worker.
36443 - Make the numbers in read-history and write-history into uint64s,
36444 so they don't overflow and publish negatives in the descriptor.
36446 o Fixes on 0.1.0.x:
36447 - For the OS X package's modified privoxy config file, comment
36448 out the "logfile" line so we don't log everything passed
36450 - We were whining about using socks4 or socks5-with-local-lookup
36451 even when it's an IP in the "virtual" range we designed exactly
36453 - We were leaking some memory every time the client changes IPs.
36454 - Never call free() on tor_malloc()d memory. This will help us
36455 use dmalloc to detect memory leaks.
36456 - Check for named servers when looking them up by nickname;
36457 warn when we'recalling a non-named server by its nickname;
36458 don't warn twice about the same name.
36459 - Try to list MyFamily elements by key, not by nickname, and warn
36460 if we've not heard of the server.
36461 - Make windows platform detection (uname equivalent) smarter.
36462 - It turns out sparc64 doesn't like unaligned access either.
36465 Changes in version 0.1.0.15 - 2005-09-23
36466 o Bugfixes on 0.1.0.x:
36467 - Reject ports 465 and 587 (spam targets) in default exit policy.
36468 - Don't crash when we don't have any spare file descriptors and we
36469 try to spawn a dns or cpu worker.
36470 - Get rid of IgnoreVersion undocumented config option, and make us
36471 only warn, never exit, when we're running an obsolete version.
36472 - Don't try to print a null string when your server finds itself to
36473 be unreachable and the Address config option is empty.
36474 - Make the numbers in read-history and write-history into uint64s,
36475 so they don't overflow and publish negatives in the descriptor.
36476 - Fix a minor memory leak in smartlist_string_remove().
36477 - We were only allowing ourselves to upload a server descriptor at
36478 most every 20 minutes, even if it changed earlier than that.
36479 - Clean up log entries that pointed to old URLs.
36482 Changes in version 0.1.1.7-alpha - 2005-09-14
36483 o Fixes on 0.1.1.6-alpha:
36484 - Exit servers were crashing when people asked them to make a
36485 connection to an address not in their exit policy.
36486 - Looking up a non-existent stream for a v1 control connection would
36488 - Fix a seg fault if we ask a dirserver for a descriptor by
36489 fingerprint but he doesn't know about him.
36490 - SETCONF was appending items to linelists, not clearing them.
36491 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
36492 out and refuse the setconf if it would fail.
36493 - Downgrade the dirserver log messages when whining about
36497 - Add Peter Palfrader's check-tor script to tor/contrib/
36498 It lets you easily check whether a given server (referenced by
36499 nickname) is reachable by you.
36500 - Numerous changes to move towards client-side v2 directories. Not
36503 o Fixes on 0.1.0.x:
36504 - If the user gave tor an odd number of command-line arguments,
36505 we were silently ignoring the last one. Now we complain and fail.
36506 [This wins the oldest-bug prize -- this bug has been present since
36507 November 2002, as released in Tor 0.0.0.]
36508 - Do not use unaligned memory access on alpha, mips, or mipsel.
36509 It *works*, but is very slow, so we treat them as if it doesn't.
36510 - Retry directory requests if we fail to get an answer we like
36511 from a given dirserver (we were retrying before, but only if
36512 we fail to connect).
36513 - When writing the RecommendedVersions line, sort them first.
36514 - When the client asked for a rendezvous port that the hidden
36515 service didn't want to provide, we were sending an IP address
36516 back along with the end cell. Fortunately, it was zero. But stop
36518 - Correct "your server is reachable" log entries to indicate that
36519 it was self-testing that told us so.
36522 Changes in version 0.1.1.6-alpha - 2005-09-09
36523 o Fixes on 0.1.1.5-alpha:
36524 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
36525 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
36526 - Fix bug with tor_memmem finding a match at the end of the string.
36527 - Make unit tests run without segfaulting.
36528 - Resolve some solaris x86 compile warnings.
36529 - Handle duplicate lines in approved-routers files without warning.
36530 - Fix bug where as soon as a server refused any requests due to his
36531 exit policy (e.g. when we ask for localhost and he tells us that's
36532 127.0.0.1 and he won't do it), we decided he wasn't obeying his
36533 exit policy using him for any exits.
36534 - Only do openssl hardware accelerator stuff if openssl version is
36537 o New controller features/fixes:
36538 - Add a "RESETCONF" command so you can set config options like
36539 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
36540 a config option in the torrc with no value, then it clears it
36541 entirely (rather than setting it to its default).
36542 - Add a "GETINFO config-file" to tell us where torrc is.
36543 - Avoid sending blank lines when GETINFO replies should be empty.
36544 - Add a QUIT command for the controller (for using it manually).
36545 - Fix a bug in SAVECONF that was adding default dirservers and
36546 other redundant entries to the torrc file.
36548 o Start on the new directory design:
36549 - Generate, publish, cache, serve new network-status format.
36550 - Publish individual descriptors (by fingerprint, by "all", and by
36552 - Publish client and server recommended versions separately.
36553 - Allow tor_gzip_uncompress() to handle multiple concatenated
36554 compressed strings. Serve compressed groups of router
36555 descriptors. The compression logic here could be more
36557 - Distinguish v1 authorities (all currently trusted directories)
36558 from v2 authorities (all trusted directories).
36559 - Change DirServers config line to note which dirs are v1 authorities.
36560 - Add configuration option "V1AuthoritativeDirectory 1" which
36561 moria1, moria2, and tor26 should set.
36562 - Remove option when getting directory cache to see whether they
36563 support running-routers; they all do now. Replace it with one
36564 to see whether caches support v2 stuff.
36567 - Dirservers now do their own external reachability testing of each
36568 Tor server, and only list them as running if they've been found to
36569 be reachable. We also send back warnings to the server's logs if
36570 it uploads a descriptor that we already believe is unreachable.
36571 - Implement exit enclaves: if we know an IP address for the
36572 destination, and there's a running Tor server at that address
36573 which allows exit to the destination, then extend the circuit to
36574 that exit first. This provides end-to-end encryption and end-to-end
36575 authentication. Also, if the user wants a .exit address or enclave,
36576 use 4 hops rather than 3, and cannibalize a general circ for it
36578 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
36579 controller. Also, rotate dns and cpu workers if the controller
36580 changes options that will affect them; and initialize the dns
36581 worker cache tree whether or not we start out as a server.
36582 - Only upload a new server descriptor when options change, 18
36583 hours have passed, uptime is reset, or bandwidth changes a lot.
36584 - Check [X-]Forwarded-For headers in HTTP requests when generating
36585 log messages. This lets people run dirservers (and caches) behind
36586 Apache but still know which IP addresses are causing warnings.
36588 o Config option changes:
36589 - Replace (Fascist)Firewall* config options with a new
36590 ReachableAddresses option that understands address policies.
36591 For example, "ReachableAddresses *:80,*:443"
36592 - Get rid of IgnoreVersion undocumented config option, and make us
36593 only warn, never exit, when we're running an obsolete version.
36594 - Make MonthlyAccountingStart config option truly obsolete now.
36596 o Fixes on 0.1.0.x:
36597 - Reject ports 465 and 587 in the default exit policy, since
36598 people have started using them for spam too.
36599 - It turns out we couldn't bootstrap a network since we added
36600 reachability detection in 0.1.0.1-rc. Good thing the Tor network
36601 has never gone down. Add an AssumeReachable config option to let
36602 servers and dirservers bootstrap. When we're trying to build a
36603 high-uptime or high-bandwidth circuit but there aren't enough
36604 suitable servers, try being less picky rather than simply failing.
36605 - Our logic to decide if the OR we connected to was the right guy
36606 was brittle and maybe open to a mitm for unverified routers.
36607 - We weren't cannibalizing circuits correctly for
36608 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
36609 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
36610 build those from scratch. This should make hidden services faster.
36611 - Predict required circuits better, with an eye toward making hidden
36612 services faster on the service end.
36613 - Retry streams if the exit node sends back a 'misc' failure. This
36614 should result in fewer random failures. Also, after failing
36615 from resolve failed or misc, reset the num failures, so we give
36616 it a fair shake next time we try.
36617 - Clean up the rendezvous warn log msgs, and downgrade some to info.
36618 - Reduce severity on logs about dns worker spawning and culling.
36619 - When we're shutting down and we do something like try to post a
36620 server descriptor or rendezvous descriptor, don't complain that
36621 we seem to be unreachable. Of course we are, we're shutting down.
36622 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
36623 We don't use them yet, but maybe one day our DNS resolver will be
36624 able to discover them.
36625 - Make ContactInfo mandatory for authoritative directory servers.
36626 - Require server descriptors to list IPv4 addresses -- hostnames
36627 are no longer allowed. This also fixes some potential security
36628 problems with people providing hostnames as their address and then
36629 preferentially resolving them to partition users.
36630 - Change log line for unreachability to explicitly suggest /etc/hosts
36631 as the culprit. Also make it clearer what IP address and ports we're
36632 testing for reachability.
36633 - Put quotes around user-supplied strings when logging so users are
36634 more likely to realize if they add bad characters (like quotes)
36636 - Let auth dir servers start without specifying an Address config
36638 - Make unit tests (and other invocations that aren't the real Tor)
36639 run without launching listeners, creating subdirectories, and so on.
36642 Changes in version 0.1.1.5-alpha - 2005-08-08
36643 o Bugfixes included in 0.1.0.14.
36645 o Bugfixes on 0.1.0.x:
36646 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
36647 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
36648 it would silently using ignore the 6668.
36651 Changes in version 0.1.0.14 - 2005-08-08
36652 o Bugfixes on 0.1.0.x:
36653 - Fix the other half of the bug with crypto handshakes
36655 - Fix an assert trigger if you send a 'signal term' via the
36656 controller when it's listening for 'event info' messages.
36659 Changes in version 0.1.1.4-alpha - 2005-08-04
36660 o Bugfixes included in 0.1.0.13.
36663 - Improve tor_gettimeofday() granularity on windows.
36664 - Make clients regenerate their keys when their IP address changes.
36665 - Implement some more GETINFO goodness: expose helper nodes, config
36666 options, getinfo keys.
36669 Changes in version 0.1.0.13 - 2005-08-04
36670 o Bugfixes on 0.1.0.x:
36671 - Fix a critical bug in the security of our crypto handshakes.
36672 - Fix a size_t underflow in smartlist_join_strings2() that made
36673 it do bad things when you hand it an empty smartlist.
36674 - Fix Windows installer to ship Tor license (thanks to Aphex for
36675 pointing out this oversight) and put a link to the doc directory
36677 - Explicitly set no-unaligned-access for sparc: it turns out the
36678 new gcc's let you compile broken code, but that doesn't make it
36682 Changes in version 0.1.1.3-alpha - 2005-07-23
36683 o Bugfixes on 0.1.1.2-alpha:
36684 - Fix a bug in handling the controller's "post descriptor"
36686 - Fix several bugs in handling the controller's "extend circuit"
36688 - Fix a bug in handling the controller's "stream status" event.
36689 - Fix an assert failure if we have a controller listening for
36690 circuit events and we go offline.
36691 - Re-allow hidden service descriptors to publish 0 intro points.
36692 - Fix a crash when generating your hidden service descriptor if
36693 you don't have enough intro points already.
36695 o New features on 0.1.1.2-alpha:
36696 - New controller function "getinfo accounting", to ask how
36697 many bytes we've used in this time period.
36698 - Experimental support for helper nodes: a lot of the risk from
36699 a small static adversary comes because users pick new random
36700 nodes every time they rebuild a circuit. Now users will try to
36701 stick to the same small set of entry nodes if they can. Not
36702 enabled by default yet.
36704 o Bugfixes on 0.1.0.12:
36705 - If you're an auth dir server, always publish your dirport,
36706 even if you haven't yet found yourself to be reachable.
36707 - Fix a size_t underflow in smartlist_join_strings2() that made
36708 it do bad things when you hand it an empty smartlist.
36711 Changes in version 0.1.0.12 - 2005-07-18
36712 o New directory servers:
36713 - tor26 has changed IP address.
36715 o Bugfixes on 0.1.0.x:
36716 - Fix a possible double-free in tor_gzip_uncompress().
36717 - When --disable-threads is set, do not search for or link against
36718 pthreads libraries.
36719 - Don't trigger an assert if an authoritative directory server
36720 claims its dirport is 0.
36721 - Fix bug with removing Tor as an NT service: some people were
36722 getting "The service did not return an error." Thanks to Matt
36726 Changes in version 0.1.1.2-alpha - 2005-07-15
36727 o New directory servers:
36728 - tor26 has changed IP address.
36730 o Bugfixes on 0.1.0.x, crashes/leaks:
36731 - Port the servers-not-obeying-their-exit-policies fix from
36733 - Fix an fd leak in start_daemon().
36734 - On Windows, you can't always reopen a port right after you've
36735 closed it. So change retry_listeners() to only close and re-open
36736 ports that have changed.
36737 - Fix a possible double-free in tor_gzip_uncompress().
36739 o Bugfixes on 0.1.0.x, usability:
36740 - When tor_socketpair() fails in Windows, give a reasonable
36741 Windows-style errno back.
36742 - Let people type "tor --install" as well as "tor -install" when
36744 want to make it an NT service.
36745 - NT service patch from Matt Edman to improve error messages.
36746 - When the controller asks for a config option with an abbreviated
36747 name, give the full name in our response.
36748 - Correct the man page entry on TrackHostExitsExpire.
36749 - Looks like we were never delivering deflated (i.e. compressed)
36750 running-routers lists, even when asked. Oops.
36751 - When --disable-threads is set, do not search for or link against
36752 pthreads libraries.
36754 o Bugfixes on 0.1.1.x:
36755 - Fix a seg fault with autodetecting which controller version is
36759 - New hidden service descriptor format: put a version in it, and
36760 let people specify introduction/rendezvous points that aren't
36761 in "the directory" (which is subjective anyway).
36762 - Allow the DEBUG controller event to work again. Mark certain log
36763 entries as "don't tell this to controllers", so we avoid cycles.
36766 Changes in version 0.1.0.11 - 2005-06-30
36767 o Bugfixes on 0.1.0.x:
36768 - Fix major security bug: servers were disregarding their
36769 exit policies if clients behaved unexpectedly.
36770 - Make OS X init script check for missing argument, so we don't
36771 confuse users who invoke it incorrectly.
36772 - Fix a seg fault in "tor --hash-password foo".
36773 - The MAPADDRESS control command was broken.
36776 Changes in version 0.1.1.1-alpha - 2005-06-29
36778 - Make OS X init script check for missing argument, so we don't
36779 confuse users who invoke it incorrectly.
36780 - Fix a seg fault in "tor --hash-password foo".
36781 - Fix a possible way to DoS dirservers.
36782 - When we complain that your exit policy implicitly allows local or
36783 private address spaces, name them explicitly so operators can
36785 - Make the log message less scary when all the dirservers are
36786 temporarily unreachable.
36787 - We were printing the number of idle dns workers incorrectly when
36791 - Revised controller protocol (version 1) that uses ascii rather
36792 than binary. Add supporting libraries in python and java so you
36793 can use the controller from your applications without caring how
36794 our protocol works.
36795 - Spiffy new support for crypto hardware accelerators. Can somebody
36799 Changes in version 0.0.9.10 - 2005-06-16
36800 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
36801 - Refuse relay cells that claim to have a length larger than the
36802 maximum allowed. This prevents a potential attack that could read
36803 arbitrary memory (e.g. keys) from an exit server's process
36807 Changes in version 0.1.0.10 - 2005-06-14
36808 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
36809 libevent before 1.1a.
36812 Changes in version 0.1.0.9-rc - 2005-06-09
36814 - Reset buf->highwater every time buf_shrink() is called, not just on
36815 a successful shrink. This was causing significant memory bloat.
36816 - Fix buffer overflow when checking hashed passwords.
36817 - Security fix: if seeding the RNG on Win32 fails, quit.
36818 - Allow seeding the RNG on Win32 even when you're not running as
36820 - Disable threading on Solaris too. Something is wonky with it,
36821 cpuworkers, and reentrant libs.
36822 - Reenable the part of the code that tries to flush as soon as an
36823 OR outbuf has a full TLS record available. Perhaps this will make
36824 OR outbufs not grow as huge except in rare cases, thus saving lots
36825 of CPU time plus memory.
36826 - Reject malformed .onion addresses rather then passing them on as
36827 normal web requests.
36828 - Adapt patch from Adam Langley: fix possible memory leak in
36829 tor_lookup_hostname().
36830 - Initialize libevent later in the startup process, so the logs are
36831 already established by the time we start logging libevent warns.
36832 - Use correct errno on win32 if libevent fails.
36833 - Check and warn about known-bad/slow libevent versions.
36834 - Pay more attention to the ClientOnly config option.
36835 - Have torctl.in/tor.sh.in check for location of su binary (needed
36837 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
36838 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
36839 HttpProxyAuthenticator
36840 - Stop warning about sigpipes in the logs. We're going to
36841 pretend that getting these occasionally is normal and fine.
36842 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
36844 installer screens; and don't put stuff into StartupItems unless
36845 the user asks you to.
36846 - Require servers that use the default dirservers to have public IP
36847 addresses. We have too many servers that are configured with private
36848 IPs and their admins never notice the log entries complaining that
36849 their descriptors are being rejected.
36850 - Add OSX uninstall instructions. An actual uninstall script will
36854 Changes in version 0.1.0.8-rc - 2005-05-23
36856 - It turns out that kqueue on OS X 10.3.9 was causing kernel
36857 panics. Disable kqueue on all OS X Tors.
36858 - Fix RPM: remove duplicate line accidentally added to the rpm
36860 - Disable threads on openbsd too, since its gethostaddr is not
36862 - Tolerate libevent 0.8 since it still works, even though it's
36864 - Enable building on Red Hat 9.0 again.
36865 - Allow the middle hop of the testing circuit to be running any
36866 version, now that most of them have the bugfix to let them connect
36867 to unknown servers. This will allow reachability testing to work
36868 even when 0.0.9.7-0.0.9.9 become obsolete.
36869 - Handle relay cells with rh.length too large. This prevents
36870 a potential attack that could read arbitrary memory (maybe even
36871 keys) from the exit server's process.
36872 - We screwed up the dirport reachability testing when we don't yet
36873 have a cached version of the directory. Hopefully now fixed.
36874 - Clean up router_load_single_router() (used by the controller),
36875 so it doesn't seg fault on error.
36876 - Fix a minor memory leak when somebody establishes an introduction
36877 point at your Tor server.
36878 - If a socks connection ends because read fails, don't warn that
36879 you're not sending a socks reply back.
36882 - Add HttpProxyAuthenticator config option too, that works like
36883 the HttpsProxyAuthenticator config option.
36884 - Encode hashed controller passwords in hex instead of base64,
36885 to make it easier to write controllers.
36888 Changes in version 0.1.0.7-rc - 2005-05-17
36890 - Fix a bug in the OS X package installer that prevented it from
36891 installing on Tiger.
36892 - Fix a script bug in the OS X package installer that made it
36893 complain during installation.
36894 - Find libevent even if it's hiding in /usr/local/ and your
36895 CFLAGS and LDFLAGS don't tell you to look there.
36896 - Be able to link with libevent as a shared library (the default
36897 after 1.0d), even if it's hiding in /usr/local/lib and even
36898 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
36899 assuming you're running gcc. Otherwise fail and give a useful
36901 - Fix a bug in the RPM packager: set home directory for _tor to
36902 something more reasonable when first installing.
36903 - Free a minor amount of memory that is still reachable on exit.
36906 Changes in version 0.1.0.6-rc - 2005-05-14
36908 - Implement --disable-threads configure option. Disable threads on
36909 netbsd by default, because it appears to have no reentrant resolver
36911 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
36912 release (1.1) detects and disables kqueue if it's broken.
36913 - Append default exit policy before checking for implicit internal
36914 addresses. Now we don't log a bunch of complaints on startup
36915 when using the default exit policy.
36916 - Some people were putting "Address " in their torrc, and they had
36917 a buggy resolver that resolved " " to 0.0.0.0. Oops.
36918 - If DataDir is ~/.tor, and that expands to /.tor, then default to
36919 LOCALSTATEDIR/tor instead.
36920 - Fix fragmented-message bug in TorControl.py.
36921 - Resolve a minor bug which would prevent unreachable dirports
36922 from getting suppressed in the published descriptor.
36923 - When the controller gave us a new descriptor, we weren't resolving
36924 it immediately, so Tor would think its address was 0.0.0.0 until
36925 we fetched a new directory.
36926 - Fix an uppercase/lowercase case error in suppressing a bogus
36927 libevent warning on some Linuxes.
36930 - Begin scrubbing sensitive strings from logs by default. Turn off
36931 the config option SafeLogging if you need to do debugging.
36932 - Switch to a new buffer management algorithm, which tries to avoid
36933 reallocing and copying quite as much. In first tests it looks like
36934 it uses *more* memory on average, but less cpu.
36935 - First cut at support for "create-fast" cells. Clients can use
36936 these when extending to their first hop, since the TLS already
36937 provides forward secrecy and authentication. Not enabled on
36939 - When dirservers refuse a router descriptor, we now log its
36940 contactinfo, platform, and the poster's IP address.
36941 - Call tor_free_all instead of connections_free_all after forking, to
36942 save memory on systems that need to fork.
36943 - Whine at you if you're a server and you don't set your contactinfo.
36944 - Implement --verify-config command-line option to check if your torrc
36945 is valid without actually launching Tor.
36946 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
36947 rather than just rejecting it.
36950 Changes in version 0.1.0.5-rc - 2005-04-27
36952 - Stop trying to print a null pointer if an OR conn fails because
36953 we didn't like its cert.
36955 - Switch our internal buffers implementation to use a ring buffer,
36956 to hopefully improve performance for fast servers a lot.
36957 - Add HttpsProxyAuthenticator support (basic auth only), based
36958 on patch from Adam Langley.
36959 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
36960 the fast servers that have been joining lately.
36961 - Give hidden service accesses extra time on the first attempt,
36962 since 60 seconds is often only barely enough. This might improve
36964 - Improve performance for dirservers: stop re-parsing the whole
36965 directory every time you regenerate it.
36966 - Add more debugging info to help us find the weird dns freebsd
36967 pthreads bug; cleaner debug messages to help track future issues.
36970 Changes in version 0.0.9.9 - 2005-04-23
36971 o Bugfixes on 0.0.9.x:
36972 - If unofficial Tor clients connect and send weird TLS certs, our
36973 Tor server triggers an assert. This release contains a minimal
36974 backport from the broader fix that we put into 0.1.0.4-rc.
36977 Changes in version 0.1.0.4-rc - 2005-04-23
36979 - If unofficial Tor clients connect and send weird TLS certs, our
36980 Tor server triggers an assert. Stop asserting, and start handling
36981 TLS errors better in other situations too.
36982 - When the controller asks us to tell it about all the debug-level
36983 logs, it turns out we were generating debug-level logs while
36984 telling it about them, which turns into a bad loop. Now keep
36985 track of whether you're sending a debug log to the controller,
36986 and don't log when you are.
36987 - Fix the "postdescriptor" feature of the controller interface: on
36988 non-complete success, only say "done" once.
36990 - Clients are now willing to load balance over up to 2mB, not 1mB,
36991 of advertised bandwidth capacity.
36992 - Add a NoPublish config option, so you can be a server (e.g. for
36993 testing running Tor servers in other Tor networks) without
36994 publishing your descriptor to the primary dirservers.
36997 Changes in version 0.1.0.3-rc - 2005-04-08
36998 o Improvements on 0.1.0.2-rc:
36999 - Client now retries when streams end early for 'hibernating' or
37000 'resource limit' reasons, rather than failing them.
37001 - More automated handling for dirserver operators:
37002 - Automatically approve nodes running 0.1.0.2-rc or later,
37003 now that the the reachability detection stuff is working.
37004 - Now we allow two unverified servers with the same nickname
37005 but different keys. But if a nickname is verified, only that
37006 nickname+key are allowed.
37007 - If you're an authdirserver connecting to an address:port,
37008 and it's not the OR you were expecting, forget about that
37009 descriptor. If he *was* the one you were expecting, then forget
37010 about all other descriptors for that address:port.
37011 - Allow servers to publish descriptors from 12 hours in the future.
37012 Corollary: only whine about clock skew from the dirserver if
37013 he's a trusted dirserver (since now even verified servers could
37014 have quite wrong clocks).
37015 - Adjust maximum skew and age for rendezvous descriptors: let skew
37016 be 48 hours rather than 90 minutes.
37017 - Efficiency improvements:
37018 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
37019 it much faster to look up a circuit for each relay cell.
37020 - Remove most calls to assert_all_pending_dns_resolves_ok(),
37021 since they're eating our cpu on exit nodes.
37022 - Stop wasting time doing a case insensitive comparison for every
37023 dns name every time we do any lookup. Canonicalize the names to
37024 lowercase and be done with it.
37025 - Start sending 'truncated' cells back rather than destroy cells,
37026 if the circuit closes in front of you. This means we won't have
37027 to abandon partially built circuits.
37028 - Only warn once per nickname from add_nickname_list_to_smartlist
37029 per failure, so an entrynode or exitnode choice that's down won't
37031 - Put a note in the torrc about abuse potential with the default
37033 - Revise control spec and implementation to allow all log messages to
37034 be sent to controller with their severities intact (suggested by
37035 Matt Edman). Update TorControl to handle new log event types.
37036 - Provide better explanation messages when controller's POSTDESCRIPTOR
37038 - Stop putting nodename in the Platform string in server descriptors.
37039 It doesn't actually help, and it is confusing/upsetting some people.
37041 o Bugfixes on 0.1.0.2-rc:
37042 - We were printing the host mask wrong in exit policies in server
37043 descriptors. This isn't a critical bug though, since we were still
37044 obeying the exit policy internally.
37045 - Fix Tor when compiled with libevent but without pthreads: move
37046 connection_unregister() from _connection_free() to
37048 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
37049 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
37050 when we look through the connection array, we'll find any of the
37051 cpu/dnsworkers. This is no good.
37053 o Bugfixes on 0.0.9.8:
37054 - Fix possible bug on threading platforms (e.g. win32) which was
37055 leaking a file descriptor whenever a cpuworker or dnsworker died.
37056 - When using preferred entry or exit nodes, ignore whether the
37057 circuit wants uptime or capacity. They asked for the nodes, they
37059 - chdir() to your datadirectory at the *end* of the daemonize process,
37060 not the beginning. This was a problem because the first time you
37061 run tor, if your datadir isn't there, and you have runasdaemon set
37062 to 1, it will try to chdir to it before it tries to create it. Oops.
37063 - Handle changed router status correctly when dirserver reloads
37064 fingerprint file. We used to be dropping all unverified descriptors
37065 right then. The bug was hidden because we would immediately
37066 fetch a directory from another dirserver, which would include the
37067 descriptors we just dropped.
37068 - When we're connecting to an OR and he's got a different nickname/key
37069 than we were expecting, only complain loudly if we're an OP or a
37070 dirserver. Complaining loudly to the OR admins just confuses them.
37071 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
37072 artificially capped at 500kB.
37075 Changes in version 0.0.9.8 - 2005-04-07
37076 o Bugfixes on 0.0.9.x:
37077 - We have a bug that I haven't found yet. Sometimes, very rarely,
37078 cpuworkers get stuck in the 'busy' state, even though the cpuworker
37079 thinks of itself as idle. This meant that no new circuits ever got
37080 established. Here's a workaround to kill any cpuworker that's been
37081 busy for more than 100 seconds.
37084 Changes in version 0.1.0.2-rc - 2005-04-01
37085 o Bugfixes on 0.1.0.1-rc:
37086 - Fixes on reachability detection:
37087 - Don't check for reachability while hibernating.
37088 - If ORPort is reachable but DirPort isn't, still publish the
37089 descriptor, but zero out DirPort until it's found reachable.
37090 - When building testing circs for ORPort testing, use only
37091 high-bandwidth nodes, so fewer circuits fail.
37092 - Complain about unreachable ORPort separately from unreachable
37093 DirPort, so the user knows what's going on.
37094 - Make sure we only conclude ORPort reachability if we didn't
37095 initiate the conn. Otherwise we could falsely conclude that
37096 we're reachable just because we connected to the guy earlier
37097 and he used that same pipe to extend to us.
37098 - Authdirservers shouldn't do ORPort reachability detection,
37099 since they're in clique mode, so it will be rare to find a
37100 server not already connected to them.
37101 - When building testing circuits, always pick middle hops running
37102 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
37103 bug. (This is a kludge; it will go away when 0.0.9.x becomes
37105 - When we decide we're reachable, actually publish our descriptor
37107 - Fix bug in redirectstream in the controller.
37108 - Fix the state descriptor strings so logs don't claim edge streams
37109 are in a different state than they actually are.
37110 - Use recent libevent features when possible (this only really affects
37111 win32 and osx right now, because the new libevent with these
37112 features hasn't been released yet). Add code to suppress spurious
37114 - Prevent possible segfault in connection_close_unattached_ap().
37115 - Fix newlines on torrc in win32.
37116 - Improve error msgs when tor-resolve fails.
37118 o Improvements on 0.0.9.x:
37119 - New experimental script tor/contrib/ExerciseServer.py (needs more
37120 work) that uses the controller interface to build circuits and
37121 fetch pages over them. This will help us bootstrap servers that
37122 have lots of capacity but haven't noticed it yet.
37123 - New experimental script tor/contrib/PathDemo.py (needs more work)
37124 that uses the controller interface to let you choose whole paths
37126 "<hostname>.<path,separated by dots>.<length of path>.path"
37127 - When we've connected to an OR and handshaked but didn't like
37128 the result, we were closing the conn without sending destroy
37129 cells back for pending circuits. Now send those destroys.
37132 Changes in version 0.0.9.7 - 2005-04-01
37133 o Bugfixes on 0.0.9.x:
37134 - Fix another race crash bug (thanks to Glenn Fink for reporting).
37135 - Compare identity to identity, not to nickname, when extending to
37136 a router not already in the directory. This was preventing us from
37137 extending to unknown routers. Oops.
37138 - Make sure to create OS X Tor user in <500 range, so we aren't
37139 creating actual system users.
37140 - Note where connection-that-hasn't-sent-end was marked, and fix
37141 a few really loud instances of this harmless bug (it's fixed more
37145 Changes in version 0.1.0.1-rc - 2005-03-28
37147 - Add reachability testing. Your Tor server will automatically try
37148 to see if its ORPort and DirPort are reachable from the outside,
37149 and it won't upload its descriptor until it decides they are.
37150 - Handle unavailable hidden services better. Handle slow or busy
37151 hidden services better.
37152 - Add support for CONNECTing through https proxies, with "HttpsProxy"
37154 - New exit policy: accept most low-numbered ports, rather than
37155 rejecting most low-numbered ports.
37156 - More Tor controller support (still experimental). See
37157 http://tor.eff.org/doc/control-spec.txt for all the new features,
37158 including signals to emulate unix signals from any platform;
37159 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
37160 closestream; closecircuit; etc.
37161 - Make nt services work and start on startup on win32 (based on
37162 patch by Matt Edman).
37163 - Add a new AddressMap config directive to rewrite incoming socks
37164 addresses. This lets you, for example, declare an implicit
37165 required exit node for certain sites.
37166 - Add a new TrackHostExits config directive to trigger addressmaps
37167 for certain incoming socks addresses -- for sites that break when
37168 your exit keeps changing (based on patch by Mike Perry).
37169 - Redo the client-side dns cache so it's just an addressmap too.
37170 - Notice when our IP changes, and reset stats/uptime/reachability.
37171 - When an application is using socks5, give him the whole variety of
37172 potential socks5 responses (connect refused, host unreachable, etc),
37173 rather than just "success" or "failure".
37174 - A more sane version numbering system. See
37175 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
37176 - New contributed script "exitlist": a simple python script to
37177 parse directories and find Tor nodes that exit to listed
37179 - New contributed script "privoxy-tor-toggle" to toggle whether
37180 Privoxy uses Tor. Seems to be configured for Debian by default.
37181 - Report HTTP reasons to client when getting a response from directory
37182 servers -- so you can actually know what went wrong.
37183 - New config option MaxAdvertisedBandwidth which lets you advertise
37184 a low bandwidthrate (to not attract as many circuits) while still
37185 allowing a higher bandwidthrate in reality.
37187 o Robustness/stability fixes:
37188 - Make Tor use Niels Provos's libevent instead of its current
37189 poll-but-sometimes-select mess. This will let us use faster async
37190 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
37192 - pthread support now too. This was forced because when we forked,
37193 we ended up wasting a lot of duplicate ram over time. Also switch
37194 to foo_r versions of some library calls to allow reentry and
37196 - Better handling for heterogeneous / unreliable nodes:
37197 - Annotate circuits w/ whether they aim to contain high uptime nodes
37198 and/or high capacity nodes. When building circuits, choose
37200 - This means that every single node in an intro rend circuit,
37201 not just the last one, will have a minimum uptime.
37202 - New config option LongLivedPorts to indicate application streams
37203 that will want high uptime circuits.
37204 - Servers reset uptime when a dir fetch entirely fails. This
37205 hopefully reflects stability of the server's network connectivity.
37206 - If somebody starts his tor server in Jan 2004 and then fixes his
37207 clock, don't make his published uptime be a year.
37208 - Reset published uptime when you wake up from hibernation.
37209 - Introduce a notion of 'internal' circs, which are chosen without
37210 regard to the exit policy of the last hop. Intro and rendezvous
37211 circs must be internal circs, to avoid leaking information. Resolve
37212 and connect streams can use internal circs if they want.
37213 - New circuit pooling algorithm: make sure to have enough circs around
37214 to satisfy any predicted ports, and also make sure to have 2 internal
37215 circs around if we've required internal circs lately (and with high
37216 uptime if we've seen that lately too).
37217 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
37218 which describes how often we retry making new circuits if current
37219 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
37220 how long we're willing to make use of an already-dirty circuit.
37221 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
37222 circ as necessary, if there are any completed ones lying around
37223 when we try to launch one.
37224 - Make hidden services try to establish a rendezvous for 30 seconds,
37225 rather than for n (where n=3) attempts to build a circuit.
37226 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
37227 "ShutdownWaitLength".
37228 - Try to be more zealous about calling connection_edge_end when
37229 things go bad with edge conns in connection.c.
37230 - Revise tor-spec to add more/better stream end reasons.
37231 - Revise all calls to connection_edge_end to avoid sending "misc",
37232 and to take errno into account where possible.
37235 - Fix a race condition that can trigger an assert, when we have a
37236 pending create cell and an OR connection fails right then.
37237 - Fix several double-mark-for-close bugs, e.g. where we were finding
37238 a conn for a cell even if that conn is already marked for close.
37239 - Make sequence of log messages when starting on win32 with no config
37240 file more reasonable.
37241 - When choosing an exit node for a new non-internal circ, don't take
37242 into account whether it'll be useful for any pending x.onion
37243 addresses -- it won't.
37244 - Turn addr_policy_compare from a tristate to a quadstate; this should
37245 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
37246 for google.com" problem.
37247 - Make "platform" string in descriptor more accurate for Win32 servers,
37248 so it's not just "unknown platform".
37249 - Fix an edge case in parsing config options (thanks weasel).
37250 If they say "--" on the commandline, it's not an option.
37251 - Reject odd-looking addresses at the client (e.g. addresses that
37252 contain a colon), rather than having the server drop them because
37254 - tor-resolve requests were ignoring .exit if there was a working circuit
37255 they could use instead.
37256 - REUSEADDR on normal platforms means you can rebind to the port
37257 right after somebody else has let it go. But REUSEADDR on win32
37258 means to let you bind to the port _even when somebody else
37259 already has it bound_! So, don't do that on Win32.
37260 - Change version parsing logic: a version is "obsolete" if it is not
37261 recommended and (1) there is a newer recommended version in the
37262 same series, or (2) there are no recommended versions in the same
37263 series, but there are some recommended versions in a newer series.
37264 A version is "new" if it is newer than any recommended version in
37266 - Stop most cases of hanging up on a socks connection without sending
37270 - Require BandwidthRate to be at least 20kB/s for servers.
37271 - When a dirserver causes you to give a warn, mention which dirserver
37273 - New config option DirAllowPrivateAddresses for authdirservers.
37274 Now by default they refuse router descriptors that have non-IP or
37275 private-IP addresses.
37276 - Stop publishing socksport in the directory, since it's not
37277 actually meant to be public. For compatibility, publish a 0 there
37279 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
37280 smart" value, that is low for servers and high for clients.
37281 - If our clock jumps forward by 100 seconds or more, assume something
37282 has gone wrong with our network and abandon all not-yet-used circs.
37283 - Warn when exit policy implicitly allows local addresses.
37284 - If we get an incredibly skewed timestamp from a dirserver mirror
37285 that isn't a verified OR, don't warn -- it's probably him that's
37287 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
37288 cookies to disk and doesn't log each web request to disk. (Thanks
37289 to Brett Carrington for pointing this out.)
37290 - When a client asks us for a dir mirror and we don't have one,
37291 launch an attempt to get a fresh one.
37292 - If we're hibernating and we get a SIGINT, exit immediately.
37293 - Add --with-dmalloc ./configure option, to track memory leaks.
37294 - And try to free all memory on closing, so we can detect what
37296 - Cache local dns resolves correctly even when they're .exit
37298 - Give a better warning when some other server advertises an
37299 ORPort that is actually an apache running ssl.
37300 - Add "opt hibernating 1" to server descriptor to make it clearer
37301 whether the server is hibernating.
37304 Changes in version 0.0.9.6 - 2005-03-24
37305 o Bugfixes on 0.0.9.x (crashes and asserts):
37306 - Add new end stream reasons to maintenance branch. Fix bug where
37307 reason (8) could trigger an assert. Prevent bug from recurring.
37308 - Apparently win32 stat wants paths to not end with a slash.
37309 - Fix assert triggers in assert_cpath_layer_ok(), where we were
37310 blowing away the circuit that conn->cpath_layer points to, then
37311 checking to see if the circ is well-formed. Backport check to make
37312 sure we dont use the cpath on a closed connection.
37313 - Prevent circuit_resume_edge_reading_helper() from trying to package
37314 inbufs for marked-for-close streams.
37315 - Don't crash on hup if your options->address has become unresolvable.
37316 - Some systems (like OS X) sometimes accept() a connection and tell
37317 you the remote host is 0.0.0.0:0. If this happens, due to some
37318 other mis-features, we get confused; so refuse the conn for now.
37320 o Bugfixes on 0.0.9.x (other):
37321 - Fix harmless but scary "Unrecognized content encoding" warn message.
37322 - Add new stream error reason: TORPROTOCOL reason means "you are not
37323 speaking a version of Tor I understand; say bye-bye to your stream."
37324 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
37325 into the future, now that we are more tolerant of skew. This
37326 resolves a bug where a Tor server would refuse to cache a directory
37327 because all the directories it gets are too far in the future;
37328 yet the Tor server never logs any complaints about clock skew.
37329 - Mac packaging magic: make man pages useable, and do not overwrite
37330 existing torrc files.
37331 - Make OS X log happily to /var/log/tor/tor.log
37334 Changes in version 0.0.9.5 - 2005-02-22
37335 o Bugfixes on 0.0.9.x:
37336 - Fix an assert race at exit nodes when resolve requests fail.
37337 - Stop picking unverified dir mirrors--it only leads to misery.
37338 - Patch from Matt Edman to make NT services work better. Service
37339 support is still not compiled into the executable by default.
37340 - Patch from Dmitri Bely so the Tor service runs better under
37341 the win32 SYSTEM account.
37342 - Make tor-resolve actually work (?) on Win32.
37343 - Fix a sign bug when getrlimit claims to have 4+ billion
37344 file descriptors available.
37345 - Stop refusing to start when bandwidthburst == bandwidthrate.
37346 - When create cells have been on the onion queue more than five
37347 seconds, just send back a destroy and take them off the list.
37350 Changes in version 0.0.9.4 - 2005-02-03
37351 o Bugfixes on 0.0.9:
37352 - Fix an assert bug that took down most of our servers: when
37353 a server claims to have 1 GB of bandwidthburst, don't
37355 - Don't crash as badly if we have spawned the max allowed number
37356 of dnsworkers, or we're out of file descriptors.
37357 - Block more file-sharing ports in the default exit policy.
37358 - MaxConn is now automatically set to the hard limit of max
37359 file descriptors we're allowed (ulimit -n), minus a few for
37361 - Give a clearer message when servers need to raise their
37362 ulimit -n when they start running out of file descriptors.
37363 - SGI Compatibility patches from Jan Schaumann.
37364 - Tolerate a corrupt cached directory better.
37365 - When a dirserver hasn't approved your server, list which one.
37366 - Go into soft hibernation after 95% of the bandwidth is used,
37367 not 99%. This is especially important for daily hibernators who
37368 have a small accounting max. Hopefully it will result in fewer
37369 cut connections when the hard hibernation starts.
37370 - Load-balance better when using servers that claim more than
37371 800kB/s of capacity.
37372 - Make NT services work (experimental, only used if compiled in).
37375 Changes in version 0.0.9.3 - 2005-01-21
37376 o Bugfixes on 0.0.9:
37377 - Backport the cpu use fixes from main branch, so busy servers won't
37378 need as much processor time.
37379 - Work better when we go offline and then come back, or when we
37380 run Tor at boot before the network is up. We do this by
37381 optimistically trying to fetch a new directory whenever an
37382 application request comes in and we think we're offline -- the
37383 human is hopefully a good measure of when the network is back.
37384 - Backport some minimal hidserv bugfixes: keep rend circuits open as
37385 long as you keep using them; actually publish hidserv descriptors
37386 shortly after they change, rather than waiting 20-40 minutes.
37387 - Enable Mac startup script by default.
37388 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
37389 - When you update AllowUnverifiedNodes or FirewallPorts via the
37390 controller's setconf feature, we were always appending, never
37392 - When you update HiddenServiceDir via setconf, it was screwing up
37393 the order of reading the lines, making it fail.
37394 - Do not rewrite a cached directory back to the cache; otherwise we
37395 will think it is recent and not fetch a newer one on startup.
37396 - Workaround for webservers that lie about Content-Encoding: Tor
37397 now tries to autodetect compressed directories and compression
37398 itself. This lets us Proxypass dir fetches through apache.
37401 Changes in version 0.0.9.2 - 2005-01-04
37402 o Bugfixes on 0.0.9 (crashes and asserts):
37403 - Fix an assert on startup when the disk is full and you're logging
37405 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
37406 style address, then we'd crash.
37407 - Fix an assert trigger when the running-routers string we get from
37408 a dirserver is broken.
37409 - Make worker threads start and run on win32. Now win32 servers
37411 - Bandaid (not actually fix, but now it doesn't crash) an assert
37412 where the dns worker dies mysteriously and the main Tor process
37413 doesn't remember anything about the address it was resolving.
37415 o Bugfixes on 0.0.9 (Win32):
37416 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
37417 name out of the warning/assert messages.
37418 - Fix a superficial "unhandled error on read" bug on win32.
37419 - The win32 installer no longer requires a click-through for our
37420 license, since our Free Software license grants rights but does not
37422 - Win32: When connecting to a dirserver fails, try another one
37423 immediately. (This was already working for non-win32 Tors.)
37424 - Stop trying to parse $HOME on win32 when hunting for default
37426 - Make tor-resolve.c work on win32 by calling network_init().
37428 o Bugfixes on 0.0.9 (other):
37429 - Make 0.0.9.x build on Solaris again.
37430 - Due to a fencepost error, we were blowing away the \n when reporting
37431 confvalue items in the controller. So asking for multiple config
37432 values at once couldn't work.
37433 - When listing circuits that are pending on an opening OR connection,
37434 if we're an OR we were listing circuits that *end* at us as
37435 being pending on every listener, dns/cpu worker, etc. Stop that.
37436 - Dirservers were failing to create 'running-routers' or 'directory'
37437 strings if we had more than some threshold of routers. Fix them so
37438 they can handle any number of routers.
37439 - Fix a superficial "Duplicate mark for close" bug.
37440 - Stop checking for clock skew for OR connections, even for servers.
37441 - Fix a fencepost error that was chopping off the last letter of any
37442 nickname that is the maximum allowed nickname length.
37443 - Update URLs in log messages so they point to the new website.
37444 - Fix a potential problem in mangling server private keys while
37445 writing to disk (not triggered yet, as far as we know).
37446 - Include the licenses for other free software we include in Tor,
37447 now that we're shipping binary distributions more regularly.
37450 Changes in version 0.0.9.1 - 2004-12-15
37451 o Bugfixes on 0.0.9:
37452 - Make hibernation actually work.
37453 - Make HashedControlPassword config option work.
37454 - When we're reporting event circuit status to a controller,
37455 don't use the stream status code.
37458 Changes in version 0.0.9 - 2004-12-12
37460 - Clean up manpage and torrc.sample file.
37461 - Clean up severities and text of log warnings.
37463 - Make servers trigger an assert when they enter hibernation.
37466 Changes in version 0.0.9rc7 - 2004-12-08
37467 o Bugfixes on 0.0.9rc:
37468 - Fix a stack-trashing crash when an exit node begins hibernating.
37469 - Avoid looking at unallocated memory while considering which
37470 ports we need to build circuits to cover.
37471 - Stop a sigpipe: when an 'end' cell races with eof from the app,
37472 we shouldn't hold-open-until-flush if the eof arrived first.
37473 - Fix a bug with init_cookie_authentication() in the controller.
37474 - When recommending new-format log lines, if the upper bound is
37475 LOG_ERR, leave it implicit.
37477 o Bugfixes on 0.0.8.1:
37478 - Fix a whole slew of memory leaks.
37479 - Fix isspace() and friends so they still make Solaris happy
37480 but also so they don't trigger asserts on win32.
37481 - Fix parse_iso_time on platforms without strptime (eg win32).
37482 - win32: tolerate extra "readable" events better.
37483 - win32: when being multithreaded, leave parent fdarray open.
37484 - Make unit tests work on win32.
37487 Changes in version 0.0.9rc6 - 2004-12-06
37488 o Bugfixes on 0.0.9pre:
37489 - Clean up some more integer underflow opportunities (not exploitable
37491 - While hibernating, hup should not regrow our listeners.
37492 - Send an end to the streams we close when we hibernate, rather
37493 than just chopping them off.
37494 - React to eof immediately on non-open edge connections.
37496 o Bugfixes on 0.0.8.1:
37497 - Calculate timeout for waiting for a connected cell from the time
37498 we sent the begin cell, not from the time the stream started. If
37499 it took a long time to establish the circuit, we would time out
37500 right after sending the begin cell.
37501 - Fix router_compare_addr_to_addr_policy: it was not treating a port
37502 of * as always matching, so we were picking reject *:* nodes as
37503 exit nodes too. Oops.
37506 - New circuit building strategy: keep a list of ports that we've
37507 used in the past 6 hours, and always try to have 2 circuits open
37508 or on the way that will handle each such port. Seed us with port
37509 80 so web users won't complain that Tor is "slow to start up".
37510 - Make kill -USR1 dump more useful stats about circuits.
37511 - When warning about retrying or giving up, print the address, so
37512 the user knows which one it's talking about.
37513 - If you haven't used a clean circuit in an hour, throw it away,
37514 just to be on the safe side. (This means after 6 hours a totally
37515 unused Tor client will have no circuits open.)
37518 Changes in version 0.0.9rc5 - 2004-12-01
37519 o Bugfixes on 0.0.8.1:
37520 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
37521 - Let resolve conns retry/expire also, rather than sticking around
37523 - If we are using select, make sure we stay within FD_SETSIZE.
37525 o Bugfixes on 0.0.9pre:
37526 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
37527 but doesn't seem to be currently; thanks to Ilja van Sprundel for
37529 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
37530 instead. Impose minima and maxima for all *Period options; impose
37531 even tighter maxima for fetching if we are a caching dirserver.
37532 Clip rather than rejecting.
37533 - Fetch cached running-routers from servers that serve it (that is,
37534 authdirservers and servers running 0.0.9rc5-cvs or later.)
37537 - Accept *:706 (silc) in default exit policy.
37538 - Implement new versioning format for post 0.1.
37539 - Support "foo.nickname.exit" addresses, to let Alice request the
37540 address "foo" as viewed by exit node "nickname". Based on a patch
37542 - Make tor --version --version dump the cvs Id of every file.
37545 Changes in version 0.0.9rc4 - 2004-11-28
37546 o Bugfixes on 0.0.8.1:
37547 - Make windows sockets actually non-blocking (oops), and handle
37548 win32 socket errors better.
37550 o Bugfixes on 0.0.9rc1:
37551 - Actually catch the -USR2 signal.
37554 Changes in version 0.0.9rc3 - 2004-11-25
37555 o Bugfixes on 0.0.8.1:
37556 - Flush the log file descriptor after we print "Tor opening log file",
37557 so we don't see those messages days later.
37559 o Bugfixes on 0.0.9rc1:
37560 - Make tor-resolve work again.
37561 - Avoid infinite loop in tor-resolve if tor hangs up on it.
37562 - Fix an assert trigger for clients/servers handling resolves.
37565 Changes in version 0.0.9rc2 - 2004-11-24
37566 o Bugfixes on 0.0.9rc1:
37567 - I broke socks5 support while fixing the eof bug.
37568 - Allow unitless bandwidths and intervals; they default to bytes
37570 - New servers don't start out hibernating; they are active until
37571 they run out of bytes, so they have a better estimate of how
37572 long it takes, and so their operators can know they're working.
37575 Changes in version 0.0.9rc1 - 2004-11-23
37576 o Bugfixes on 0.0.8.1:
37577 - Finally fix a bug that's been plaguing us for a year:
37578 With high load, circuit package window was reaching 0. Whenever
37579 we got a circuit-level sendme, we were reading a lot on each
37580 socket, but only writing out a bit. So we would eventually reach
37581 eof. This would be noticed and acted on even when there were still
37582 bytes sitting in the inbuf.
37583 - When poll() is interrupted, we shouldn't believe the revents values.
37585 o Bugfixes on 0.0.9pre6:
37586 - Fix hibernate bug that caused pre6 to be broken.
37587 - Don't keep rephist info for routers that haven't had activity for
37588 24 hours. (This matters now that clients have keys, since we track
37590 - Never call close_temp_logs while validating log options.
37591 - Fix backslash-escaping on tor.sh.in and torctl.in.
37594 - Implement weekly/monthly/daily accounting: now you specify your
37595 hibernation properties by
37596 AccountingMax N bytes|KB|MB|GB|TB
37597 AccountingStart day|week|month [day] HH:MM
37598 Defaults to "month 1 0:00".
37599 - Let bandwidth and interval config options be specified as 5 bytes,
37600 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
37601 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
37602 get back to normal.)
37603 - If your requested entry or exit node has advertised bandwidth 0,
37605 - Be more greedy about filling up relay cells -- we try reading again
37606 once we've processed the stuff we read, in case enough has arrived
37607 to fill the last cell completely.
37608 - Apply NT service patch from Osamu Fujino. Still needs more work.
37611 Changes in version 0.0.9pre6 - 2004-11-15
37612 o Bugfixes on 0.0.8.1:
37613 - Fix assert failure on malformed socks4a requests.
37614 - Use identity comparison, not nickname comparison, to choose which
37615 half of circuit-ID-space each side gets to use. This is needed
37616 because sometimes we think of a router as a nickname, and sometimes
37617 as a hex ID, and we can't predict what the other side will do.
37618 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
37619 write() call will fail and we handle it there.
37620 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
37621 and smartlist_len, which are two major profiling offenders.
37623 o Bugfixes on 0.0.9pre5:
37624 - Fix a bug in read_all that was corrupting config files on windows.
37625 - When we're raising the max number of open file descriptors to
37626 'unlimited', don't log that we just raised it to '-1'.
37627 - Include event code with events, as required by control-spec.txt.
37628 - Don't give a fingerprint when clients do --list-fingerprint:
37629 it's misleading, because it will never be the same again.
37630 - Stop using strlcpy in tor_strndup, since it was slowing us
37632 - Remove warn on startup about missing cached-directory file.
37633 - Make kill -USR1 work again.
37634 - Hibernate if we start tor during the "wait for wakeup-time" phase
37635 of an accounting interval. Log our hibernation plans better.
37636 - Authoritative dirservers now also cache their directory, so they
37637 have it on start-up.
37640 - Fetch running-routers; cache running-routers; compress
37641 running-routers; serve compressed running-routers.z
37642 - Add NSI installer script contributed by J Doe.
37643 - Commit VC6 and VC7 workspace/project files.
37644 - Commit a tor.spec for making RPM files, with help from jbash.
37645 - Add contrib/torctl.in contributed by Glenn Fink.
37646 - Implement the control-spec's SAVECONF command, to write your
37647 configuration to torrc.
37648 - Get cookie authentication for the controller closer to working.
37649 - Include control-spec.txt in the tarball.
37650 - When set_conf changes our server descriptor, upload a new copy.
37651 But don't upload it too often if there are frequent changes.
37652 - Document authentication config in man page, and document signals
37654 - Clean up confusing parts of man page and torrc.sample.
37655 - Make expand_filename handle ~ and ~username.
37656 - Use autoconf to enable largefile support where necessary. Use
37657 ftello where available, since ftell can fail at 2GB.
37658 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
37659 log more informatively.
37660 - Give a slightly more useful output for "tor -h".
37661 - Refuse application socks connections to port 0.
37662 - Check clock skew for verified servers, but allow unverified
37663 servers and clients to have any clock skew.
37664 - Break DirFetchPostPeriod into:
37665 - DirFetchPeriod for fetching full directory,
37666 - StatusFetchPeriod for fetching running-routers,
37667 - DirPostPeriod for posting server descriptor,
37668 - RendPostPeriod for posting hidden service descriptors.
37669 - Make sure the hidden service descriptors are at a random offset
37670 from each other, to hinder linkability.
37673 Changes in version 0.0.9pre5 - 2004-11-09
37674 o Bugfixes on 0.0.9pre4:
37675 - Fix a seg fault in unit tests (doesn't affect main program).
37676 - Fix an assert bug where a hidden service provider would fail if
37677 the first hop of his rendezvous circuit was down.
37678 - Hidden service operators now correctly handle version 1 style
37679 INTRODUCE1 cells (nobody generates them still, so not a critical
37681 - If do_hup fails, actually notice.
37682 - Handle more errnos from accept() without closing the listener.
37683 Some OpenBSD machines were closing their listeners because
37684 they ran out of file descriptors.
37685 - Send resolve cells to exit routers that are running a new
37686 enough version of the resolve code to work right.
37687 - Better handling of winsock includes on non-MSV win32 compilers.
37688 - Some people had wrapped their tor client/server in a script
37689 that would restart it whenever it died. This did not play well
37690 with our "shut down if your version is obsolete" code. Now people
37691 don't fetch a new directory if their local cached version is
37693 - Make our autogen.sh work on ksh as well as bash.
37696 - Hibernation: New config option "AccountingMaxKB" lets you
37697 set how many KBytes per month you want to allow your server to
37698 consume. Rather than spreading those bytes out evenly over the
37699 month, we instead hibernate for some of the month and pop up
37700 at a deterministic time, work until the bytes are consumed, then
37701 hibernate again. Config option "MonthlyAccountingStart" lets you
37702 specify which day of the month your billing cycle starts on.
37703 - Control interface: a separate program can now talk to your
37704 client/server over a socket, and get/set config options, receive
37705 notifications of circuits and streams starting/finishing/dying,
37706 bandwidth used, etc. The next step is to get some GUIs working.
37707 Let us know if you want to help out. See doc/control-spec.txt .
37708 - Ship a contrib/tor-control.py as an example script to interact
37709 with the control port.
37710 - "tor --hash-password zzyxz" will output a salted password for
37711 use in authenticating to the control interface.
37712 - New log format in config:
37713 "Log minsev[-maxsev] stdout|stderr|syslog" or
37714 "Log minsev[-maxsev] file /var/foo"
37717 - DirPolicy config option, to let people reject incoming addresses
37718 from their dirserver.
37719 - "tor --list-fingerprint" will list your identity key fingerprint
37721 - Add "pass" target for RedirectExit, to make it easier to break
37722 out of a sequence of RedirectExit rules.
37723 - Clients now generate a TLS cert too, in preparation for having
37724 them act more like real nodes.
37725 - Ship src/win32/ in the tarball, so people can use it to build.
37726 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
37728 - New "router-status" line in directory, to better bind each verified
37729 nickname to its identity key.
37730 - Deprecate unofficial config option abbreviations, and abbreviations
37731 not on the command line.
37732 - Add a pure-C tor-resolve implementation.
37733 - Use getrlimit and friends to ensure we can reach MaxConn (currently
37734 1024) file descriptors.
37736 o Code security improvements, inspired by Ilja:
37737 - Replace sprintf with snprintf. (I think they were all safe, but
37739 - Replace strcpy/strncpy with strlcpy in more places.
37740 - Avoid strcat; use snprintf or strlcat instead.
37741 - snprintf wrapper with consistent (though not C99) overflow behavior.
37744 Changes in version 0.0.9pre4 - 2004-10-17
37745 o Bugfixes on 0.0.9pre3:
37746 - If the server doesn't specify an exit policy, use the real default
37747 exit policy, not reject *:*.
37748 - Ignore fascistfirewall when uploading/downloading hidden service
37749 descriptors, since we go through Tor for those; and when using
37750 an HttpProxy, since we assume it can reach them all.
37751 - When looking for an authoritative dirserver, use only the ones
37752 configured at boot. Don't bother looking in the directory.
37753 - The rest of the fix for get_default_conf_file() on older win32.
37754 - Make 'Routerfile' config option obsolete.
37757 - New 'MyFamily nick1,...' config option for a server to
37758 specify other servers that shouldn't be used in the same circuit
37759 with it. Only believed if nick1 also specifies us.
37760 - New 'NodeFamily nick1,nick2,...' config option for a client to
37761 specify nodes that it doesn't want to use in the same circuit.
37762 - New 'Redirectexit pattern address:port' config option for a
37763 server to redirect exit connections, e.g. to a local squid.
37766 Changes in version 0.0.9pre3 - 2004-10-13
37767 o Bugfixes on 0.0.8.1:
37768 - Better torrc example lines for dirbindaddress and orbindaddress.
37769 - Improved bounds checking on parsed ints (e.g. config options and
37770 the ones we find in directories.)
37771 - Better handling of size_t vs int, so we're more robust on 64
37773 - Fix the rest of the bug where a newly started OR would appear
37774 as unverified even after we've added his fingerprint and hupped
37776 - Fix a bug from 0.0.7: when read() failed on a stream, we would
37777 close it without sending back an end. So 'connection refused'
37778 would simply be ignored and the user would get no response.
37780 o Bugfixes on 0.0.9pre2:
37781 - Serving the cached-on-disk directory to people is bad. We now
37782 provide no directory until we've fetched a fresh one.
37783 - Workaround for bug on windows where cached-directories get crlf
37785 - Make get_default_conf_file() work on older windows too.
37786 - If we write a *:* exit policy line in the descriptor, don't write
37787 any more exit policy lines.
37790 - Use only 0.0.9pre1 and later servers for resolve cells.
37791 - Make the dirservers file obsolete.
37792 - Include a dir-signing-key token in directories to tell the
37793 parsing entity which key is being used to sign.
37794 - Remove the built-in bulky default dirservers string.
37795 - New config option "Dirserver %s:%d [fingerprint]", which can be
37796 repeated as many times as needed. If no dirservers specified,
37797 default to moria1,moria2,tor26.
37798 - Make moria2 advertise a dirport of 80, so people behind firewalls
37799 will be able to get a directory.
37800 - Http proxy support
37801 - Dirservers translate requests for http://%s:%d/x to /x
37802 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
37803 be routed through this host.
37804 - Clients ask for /tor/x rather than /x for new enough dirservers.
37805 This way we can one day coexist peacefully with apache.
37806 - Clients specify a "Host: %s%d" http header, to be compatible
37807 with more proxies, and so running squid on an exit node can work.
37810 Changes in version 0.0.8.1 - 2004-10-13
37812 - Fix a seg fault that can be triggered remotely for Tor
37813 clients/servers with an open dirport.
37814 - Fix a rare assert trigger, where routerinfos for entries in
37815 our cpath would expire while we're building the path.
37816 - Fix a bug in OutboundBindAddress so it (hopefully) works.
37817 - Fix a rare seg fault for people running hidden services on
37818 intermittent connections.
37819 - Fix a bug in parsing opt keywords with objects.
37820 - Fix a stale pointer assert bug when a stream detaches and
37822 - Fix a string format vulnerability (probably not exploitable)
37823 in reporting stats locally.
37824 - Fix an assert trigger: sometimes launching circuits can fail
37825 immediately, e.g. because too many circuits have failed recently.
37826 - Fix a compile warning on 64 bit platforms.
37829 Changes in version 0.0.9pre2 - 2004-10-03
37831 - Make fetching a cached directory work for 64-bit platforms too.
37832 - Make zlib.h a required header, not an optional header.
37835 Changes in version 0.0.9pre1 - 2004-10-01
37837 - Stop using separate defaults for no-config-file and
37838 empty-config-file. Now you have to explicitly turn off SocksPort,
37839 if you don't want it open.
37840 - Fix a bug in OutboundBindAddress so it (hopefully) works.
37841 - Improve man page to mention more of the 0.0.8 features.
37842 - Fix a rare seg fault for people running hidden services on
37843 intermittent connections.
37844 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
37846 - Fix more dns related bugs: send back resolve_failed and end cells
37847 more reliably when the resolve fails, rather than closing the
37848 circuit and then trying to send the cell. Also attach dummy resolve
37849 connections to a circuit *before* calling dns_resolve(), to fix
37850 a bug where cached answers would never be sent in RESOLVED cells.
37851 - When we run out of disk space, or other log writing error, don't
37852 crash. Just stop logging to that log and continue.
37853 - We were starting to daemonize before we opened our logs, so if
37854 there were any problems opening logs, we would complain to stderr,
37855 which wouldn't work, and then mysteriously exit.
37856 - Fix a rare bug where sometimes a verified OR would connect to us
37857 before he'd uploaded his descriptor, which would cause us to
37858 assign conn->nickname as though he's unverified. Now we look through
37859 the fingerprint list to see if he's there.
37860 - Fix a rare assert trigger, where routerinfos for entries in
37861 our cpath would expire while we're building the path.
37864 - Clients can ask dirservers for /dir.z to get a compressed version
37865 of the directory. Only works for servers running 0.0.9, of course.
37866 - Make clients cache directories and use them to seed their router
37867 lists at startup. This means clients have a datadir again.
37868 - Configuration infrastructure support for warning on obsolete
37870 - Respond to content-encoding headers by trying to uncompress as
37872 - Reply with a deflated directory when a client asks for "dir.z".
37873 We could use allow-encodings instead, but allow-encodings isn't
37874 specified in HTTP 1.0.
37875 - Raise the max dns workers from 50 to 100.
37876 - Discourage people from setting their dirfetchpostperiod more often
37877 than once per minute.
37878 - Protect dirservers from overzealous descriptor uploading -- wait
37879 10 seconds after directory gets dirty, before regenerating.
37882 Changes in version 0.0.8 - 2004-08-25
37883 o Port it to SunOS 5.9 / Athena
37886 Changes in version 0.0.8rc2 - 2004-08-20
37887 o Make it compile on cygwin again.
37888 o When picking unverified routers, skip those with low uptime and/or
37889 low bandwidth, depending on what properties you care about.
37892 Changes in version 0.0.8rc1 - 2004-08-18
37893 o Changes from 0.0.7.3:
37895 - Fix assert triggers: if the other side returns an address 0.0.0.0,
37896 don't put it into the client dns cache.
37897 - If a begin failed due to exit policy, but we believe the IP address
37898 should have been allowed, switch that router to exitpolicy reject *:*
37899 until we get our next directory.
37901 - Clients choose nodes proportional to advertised bandwidth.
37902 - Avoid using nodes with low uptime as introduction points.
37903 - Handle servers with dynamic IP addresses: don't replace
37904 options->Address with the resolved one at startup, and
37905 detect our address right before we make a routerinfo each time.
37906 - 'FascistFirewall' option to pick dirservers and ORs on specific
37907 ports; plus 'FirewallPorts' config option to tell FascistFirewall
37908 which ports are open. (Defaults to 80,443)
37909 - Be more aggressive about trying to make circuits when the network
37910 has changed (e.g. when you unsuspend your laptop).
37911 - Check for time skew on http headers; report date in response to
37913 - If the entrynode config line has only one node, don't pick it as
37915 - Add strict{entry|exit}nodes config options. If set to 1, then
37916 we refuse to build circuits that don't include the specified entry
37918 - OutboundBindAddress config option, to bind to a specific
37919 IP address for outgoing connect()s.
37920 - End truncated log entries (e.g. directories) with "[truncated]".
37922 o Patches to 0.0.8preX:
37924 - Patches to compile and run on win32 again (maybe)?
37925 - Fix crash when looking for ~/.torrc with no $HOME set.
37926 - Fix a race bug in the unit tests.
37927 - Handle verified/unverified name collisions better when new
37928 routerinfo's arrive in a directory.
37929 - Sometimes routers were getting entered into the stats before
37930 we'd assigned their identity_digest. Oops.
37931 - Only pick and establish intro points after we've gotten a
37934 - AllowUnverifiedNodes config option to let circuits choose no-name
37935 routers in entry,middle,exit,introduction,rendezvous positions.
37936 Allow middle and rendezvous positions by default.
37937 - Add a man page for tor-resolve.
37940 Changes in version 0.0.7.3 - 2004-08-12
37941 o Stop dnsworkers from triggering an assert failure when you
37942 ask them to resolve the host "".
37945 Changes in version 0.0.8pre3 - 2004-08-09
37946 o Changes from 0.0.7.2:
37947 - Allow multiple ORs with same nickname in routerlist -- now when
37948 people give us one identity key for a nickname, then later
37949 another, we don't constantly complain until the first expires.
37950 - Remember used bandwidth (both in and out), and publish 15-minute
37951 snapshots for the past day into our descriptor.
37952 - You can now fetch $DIRURL/running-routers to get just the
37953 running-routers line, not the whole descriptor list. (But
37954 clients don't use this yet.)
37955 - When people mistakenly use Tor as an http proxy, point them
37956 at the tor-doc.html rather than the INSTALL.
37957 - Remove our mostly unused -- and broken -- hex_encode()
37958 function. Use base16_encode() instead. (Thanks to Timo Lindfors
37959 for pointing out this bug.)
37960 - Rotate onion keys every 12 hours, not every 2 hours, so we have
37961 fewer problems with people using the wrong key.
37962 - Change the default exit policy to reject the default edonkey,
37963 kazaa, gnutella ports.
37964 - Add replace_file() to util.[ch] to handle win32's rename().
37966 o Changes from 0.0.8preX:
37967 - Fix two bugs in saving onion keys to disk when rotating, so
37968 hopefully we'll get fewer people using old onion keys.
37969 - Fix an assert error that was making SocksPolicy not work.
37970 - Be willing to expire routers that have an open dirport -- it's
37971 just the authoritative dirservers we want to not forget.
37972 - Reject tor-resolve requests for .onion addresses early, so we
37973 don't build a whole rendezvous circuit and then fail.
37974 - When you're warning a server that he's unverified, don't cry
37975 wolf unpredictably.
37976 - Fix a race condition: don't try to extend onto a connection
37977 that's still handshaking.
37978 - For servers in clique mode, require the conn to be open before
37979 you'll choose it for your path.
37980 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
37981 end relay cell, etc.
37982 - Measure bandwidth capacity over the last 24 hours, not just 12
37983 - Bugfix: authoritative dirservers were making and signing a new
37984 directory for each client, rather than reusing the cached one.
37987 Changes in version 0.0.8pre2 - 2004-08-04
37988 o Changes from 0.0.7.2:
37990 - Check directory signature _before_ you decide whether you're
37991 you're running an obsolete version and should exit.
37992 - Check directory signature _before_ you parse the running-routers
37993 list to decide who's running or verified.
37994 - Bugfixes and features:
37995 - Check return value of fclose while writing to disk, so we don't
37996 end up with broken files when servers run out of disk space.
37997 - Log a warning if the user uses an unsafe socks variant, so people
37998 are more likely to learn about privoxy or socat.
37999 - Dirservers now include RFC1123-style dates in the HTTP headers,
38000 which one day we will use to better detect clock skew.
38002 o Changes from 0.0.8pre1:
38003 - Make it compile without warnings again on win32.
38004 - Log a warning if you're running an unverified server, to let you
38005 know you might want to get it verified.
38006 - Only pick a default nickname if you plan to be a server.
38009 Changes in version 0.0.8pre1 - 2004-07-23
38011 - Made our unit tests compile again on OpenBSD 3.5, and tor
38012 itself compile again on OpenBSD on a sparc64.
38013 - We were neglecting milliseconds when logging on win32, so
38014 everything appeared to happen at the beginning of each second.
38016 o Protocol changes:
38017 - 'Extend' relay cell payloads now include the digest of the
38018 intended next hop's identity key. Now we can verify that we're
38019 extending to the right router, and also extend to routers we
38020 hadn't heard of before.
38023 - Tor nodes can now act as relays (with an advertised ORPort)
38024 without being manually verified by the dirserver operators.
38025 - Uploaded descriptors of unverified routers are now accepted
38026 by the dirservers, and included in the directory.
38027 - Verified routers are listed by nickname in the running-routers
38028 list; unverified routers are listed as "$<fingerprint>".
38029 - We now use hash-of-identity-key in most places rather than
38030 nickname or addr:port, for improved security/flexibility.
38031 - To avoid Sybil attacks, paths still use only verified servers.
38032 But now we have a chance to play around with hybrid approaches.
38033 - Nodes track bandwidth usage to estimate capacity (not used yet).
38034 - ClientOnly option for nodes that never want to become servers.
38035 - Directory caching.
38036 - "AuthoritativeDir 1" option for the official dirservers.
38037 - Now other nodes (clients and servers) will cache the latest
38038 directory they've pulled down.
38039 - They can enable their DirPort to serve it to others.
38040 - Clients will pull down a directory from any node with an open
38041 DirPort, and check the signature/timestamp correctly.
38042 - Authoritative dirservers now fetch directories from other
38043 authdirservers, to stay better synced.
38044 - Running-routers list tells who's down also, along with noting
38045 if they're verified (listed by nickname) or unverified (listed
38047 - Allow dirservers to serve running-router list separately.
38048 This isn't used yet.
38049 - ORs connect-on-demand to other ORs
38050 - If you get an extend cell to an OR you're not connected to,
38051 connect, handshake, and forward the create cell.
38052 - The authoritative dirservers stay connected to everybody,
38053 and everybody stays connected to 0.0.7 servers, but otherwise
38054 clients/servers expire unused connections after 5 minutes.
38055 - When servers get a sigint, they delay 30 seconds (refusing new
38056 connections) then exit. A second sigint causes immediate exit.
38057 - File and name management:
38058 - Look for .torrc if no CONFDIR "torrc" is found.
38059 - If no datadir is defined, then choose, make, and secure ~/.tor
38061 - If torrc not found, exitpolicy reject *:*.
38062 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
38063 - If no nickname is defined, derive default from hostname.
38064 - Rename secret key files, e.g. identity.key -> secret_id_key,
38065 to discourage people from mailing their identity key to tor-ops.
38066 - Refuse to build a circuit before the directory has arrived --
38067 it won't work anyway, since you won't know the right onion keys
38069 - Try other dirservers immediately if the one you try is down. This
38070 should tolerate down dirservers better now.
38071 - Parse tor version numbers so we can do an is-newer-than check
38072 rather than an is-in-the-list check.
38073 - New socks command 'resolve', to let us shim gethostbyname()
38075 - A 'tor_resolve' script to access the socks resolve functionality.
38076 - A new socks-extensions.txt doc file to describe our
38077 interpretation and extensions to the socks protocols.
38078 - Add a ContactInfo option, which gets published in descriptor.
38079 - Publish OR uptime in descriptor (and thus in directory) too.
38080 - Write tor version at the top of each log file
38081 - New docs in the tarball:
38083 - Document that you should proxy your SSL traffic too.
38086 Changes in version 0.0.7.2 - 2004-07-07
38087 o A better fix for the 0.0.0.0 problem, that will hopefully
38088 eliminate the remaining related assertion failures.
38091 Changes in version 0.0.7.1 - 2004-07-04
38092 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
38093 since internally we use 0.0.0.0 to signify "not yet resolved".
38096 Changes in version 0.0.7 - 2004-06-07
38097 o Updated the man page to reflect the new features.
38100 Changes in version 0.0.7rc2 - 2004-06-06
38101 o Changes from 0.0.7rc1:
38102 - Make it build on Win32 again.
38103 o Changes from 0.0.6.2:
38104 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
38108 Changes in version 0.0.7rc1 - 2004-06-02
38110 - On sighup, we were adding another log without removing the first
38111 one. So log messages would get duplicated n times for n sighups.
38112 - Several cases of using a connection after we'd freed it. The
38113 problem was that connections that are pending resolve are in both
38114 the pending_resolve tree, and also the circuit's resolving_streams
38115 list. When you want to remove one, you must remove it from both.
38116 - Fix a double-mark-for-close where an end cell arrived for a
38117 resolving stream, and then the resolve failed.
38118 - Check directory signatures based on name of signer, not on whom
38119 we got the directory from. This will let us cache directories more
38122 - Crank up some of our constants to handle more users.
38125 Changes in version 0.0.7pre1 - 2004-06-02
38126 o Fixes for crashes and other obnoxious bugs:
38127 - Fix an epipe bug: sometimes when directory connections failed
38128 to connect, we would give them a chance to flush before closing
38130 - When we detached from a circuit because of resolvefailed, we
38131 would immediately try the same circuit twice more, and then
38132 give up on the resolve thinking we'd tried three different
38134 - Limit the number of intro circuits we'll attempt to build for a
38135 hidden service per 15-minute period.
38136 - Check recommended-software string *early*, before actually parsing
38137 the directory. Thus we can detect an obsolete version and exit,
38138 even if the new directory format doesn't parse.
38139 o Fixes for security bugs:
38140 - Remember which nodes are dirservers when you startup, and if a
38141 random OR enables his dirport, don't automatically assume he's
38142 a trusted dirserver.
38144 - Directory connections were asking the wrong poll socket to
38145 start writing, and not asking themselves to start writing.
38146 - When we detached from a circuit because we sent a begin but
38147 didn't get a connected, we would use it again the first time;
38148 but after that we would correctly switch to a different one.
38149 - Stop warning when the first onion decrypt attempt fails; they
38150 will sometimes legitimately fail now that we rotate keys.
38151 - Override unaligned-access-ok check when $host_cpu is ia64 or
38152 arm. Apparently they allow it but the kernel whines.
38153 - Dirservers try to reconnect periodically too, in case connections
38155 - Fix some memory leaks in directory servers.
38156 - Allow backslash in Win32 filenames.
38157 - Made Tor build complain-free on FreeBSD, hopefully without
38158 breaking other BSD builds. We'll see.
38160 - Doxygen markup on all functions and global variables.
38161 - Make directory functions update routerlist, not replace it. So
38162 now directory disagreements are not so critical a problem.
38163 - Remove the upper limit on number of descriptors in a dirserver's
38164 directory (not that we were anywhere close).
38165 - Allow multiple logfiles at different severity ranges.
38166 - Allow *BindAddress to specify ":port" rather than setting *Port
38167 separately. Allow multiple instances of each BindAddress config
38168 option, so you can bind to multiple interfaces if you want.
38169 - Allow multiple exit policy lines, which are processed in order.
38170 Now we don't need that huge line with all the commas in it.
38171 - Enable accept/reject policies on SOCKS connections, so you can bind
38172 to 0.0.0.0 but still control who can use your OP.
38175 Changes in version 0.0.6.2 - 2004-05-16
38176 o Our integrity-checking digest was checking only the most recent cell,
38177 not the previous cells like we'd thought.
38178 Thanks to Stefan Mark for finding the flaw!
38181 Changes in version 0.0.6.1 - 2004-05-06
38182 o Fix two bugs in our AES counter-mode implementation (this affected
38183 onion-level stream encryption, but not TLS-level). It turns
38184 out we were doing something much more akin to a 16-character
38185 polyalphabetic cipher. Oops.
38186 Thanks to Stefan Mark for finding the flaw!
38187 o Retire moria3 as a directory server, and add tor26 as a directory
38191 Changes in version 0.0.6 - 2004-05-02
38192 [version bump only]
38195 Changes in version 0.0.6rc4 - 2004-05-01
38196 o Update the built-in dirservers list to use the new directory format
38197 o Fix a rare seg fault: if a node offering a hidden service attempts
38198 to build a circuit to Alice's rendezvous point and fails before it
38199 reaches the last hop, it retries with a different circuit, but
38201 o Handle windows socket errors correctly.
38204 Changes in version 0.0.6rc3 - 2004-04-28
38205 o Don't expire non-general excess circuits (if we had enough
38206 circuits open, we were expiring rendezvous circuits -- even
38207 when they had a stream attached. oops.)
38208 o Fetch randomness from /dev/urandom better (not via fopen/fread)
38209 o Better debugging for tls errors
38210 o Some versions of openssl have an SSL_pending function that erroneously
38211 returns bytes when there is a non-application record pending.
38212 o Set Content-Type on the directory and hidserv descriptor.
38213 o Remove IVs from cipher code, since AES-ctr has none.
38214 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
38215 o We were using an array of length zero in a few places.
38216 o win32's gethostbyname can't resolve an IP to an IP.
38217 o win32's close can't close a socket.
38220 Changes in version 0.0.6rc2 - 2004-04-26
38221 o Fix a bug where we were closing tls connections intermittently.
38222 It turns out openssl keeps its errors around -- so if an error
38223 happens, and you don't ask about it, and then another openssl
38224 operation happens and succeeds, and you ask if there was an error,
38225 it tells you about the first error. Fun fun.
38226 o Fix a bug that's been lurking since 27 may 03 (!)
38227 When passing back a destroy cell, we would use the wrong circ id.
38228 'Mostly harmless', but still worth fixing.
38229 o Since we don't support truncateds much, don't bother sending them;
38230 just close the circ.
38231 o check for <machine/limits.h> so we build on NetBSD again (I hope).
38232 o don't crash if a conn that sent a begin has suddenly lost its circuit
38233 (this was quite rare).
38236 Changes in version 0.0.6rc1 - 2004-04-25
38237 o We now rotate link (tls context) keys and onion keys.
38238 o CREATE cells now include oaep padding, so you can tell
38239 if you decrypted them correctly.
38240 o Add bandwidthburst to server descriptor.
38241 o Directories now say which dirserver signed them.
38242 o Use a tor_assert macro that logs failed assertions too.
38245 Changes in version 0.0.6pre5 - 2004-04-18
38246 o changes from 0.0.6pre4:
38247 - make tor build on broken freebsd 5.2 installs
38248 - fix a failed assert when you try an intro point, get a nack, and try
38249 a second one and it works.
38250 - when alice uses a port that the hidden service doesn't accept,
38251 it now sends back an end cell (denied by exit policy). otherwise
38252 alice would just have to wait to time out.
38253 - fix another rare bug: when we had tried all the intro
38254 points for a hidden service, we fetched the descriptor
38255 again, but we left our introcirc thinking it had already
38256 sent an intro, so it kept waiting for a response...
38257 - bugfix: when you sleep your hidden-service laptop, as soon
38258 as it wakes up it tries to upload a service descriptor, but
38259 socketpair fails for some reason (localhost not up yet?).
38260 now we simply give up on that upload, and we'll try again later.
38261 i'd still like to find the bug though.
38262 - if an intro circ waiting for an ack dies before getting one, then
38264 - we were reusing stale service descriptors and refetching usable
38268 Changes in version 0.0.6pre4 - 2004-04-14
38269 o changes from 0.0.6pre3:
38270 - when bob fails to connect to the rendezvous point, and his
38271 circ didn't fail because of the rendezvous point itself, then
38272 he retries a couple of times
38273 - we expire introduction and rendezvous circs more thoroughly
38274 (sometimes they were hanging around forever)
38275 - we expire unattached rendezvous streams that have been around
38276 too long (they were sticking around forever).
38277 - fix a measly fencepost error that was crashing everybody with
38281 Changes in version 0.0.6pre3 - 2004-04-14
38282 o changes from 0.0.6pre2:
38283 - make hup work again
38284 - fix some memory leaks for dirservers
38285 - allow more skew in rendezvous descriptor timestamps, to help
38286 handle people like blanu who don't know what time it is
38287 - normal circs are 3 hops, but some rend/intro circs are 4, if
38288 the initiator doesn't get to choose the last hop
38289 - send acks for introductions, so alice can know whether to try
38291 - bob publishes intro points more correctly
38292 o changes from 0.0.5:
38293 - fix an assert trigger that's been plaguing us since the days
38294 of 0.0.2prexx (thanks weasel!)
38295 - retry stream correctly when we fail to connect because of
38296 exit-policy-reject (should try another) or can't-resolve-address
38297 (also should try another, because dns on random internet servers
38299 - when we hup a dirserver and we've *removed* a server from the
38300 approved-routers list, now we remove that server from the
38301 in-memory directories too
38304 Changes in version 0.0.6pre2 - 2004-04-08
38305 o We fixed our base32 implementation. Now it works on all architectures.
38308 Changes in version 0.0.6pre1 - 2004-04-08
38310 - Hidden services and rendezvous points are implemented. Go to
38311 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
38312 hidden services. (This only works via a socks4a proxy such as
38313 Privoxy, and currently it's quite slow.)
38316 Changes in version 0.0.5 - 2004-03-30
38317 [version bump only]
38320 Changes in version 0.0.5rc3 - 2004-03-29
38321 o Install torrc as torrc.sample -- we no longer clobber your
38323 o Re-enable recommendedversion checking (we broke it in rc2, oops)
38324 o Add in a 'notice' log level for things the operator should hear
38325 but that aren't warnings
38328 Changes in version 0.0.5rc2 - 2004-03-29
38329 o Hold socks connection open until reply is flushed (if possible)
38330 o Make exit nodes resolve IPs to IPs immediately, rather than asking
38331 the dns farm to do it.
38332 o Fix c99 aliasing warnings in rephist.c
38333 o Don't include server descriptors that are older than 24 hours in the
38335 o Give socks 'reject' replies their whole 15s to attempt to flush,
38336 rather than seeing the 60s timeout and assuming the flush had failed.
38337 o Clean automake droppings from the cvs repository
38340 Changes in version 0.0.5rc1 - 2004-03-28
38341 o Fix mangled-state bug in directory fetching (was causing sigpipes).
38342 o Only build circuits after we've fetched the directory: clients were
38343 using only the directory servers before they'd fetched a directory.
38344 This also means longer startup time; so it goes.
38345 o Fix an assert trigger where an OP would fail to handshake, and we'd
38346 expect it to have a nickname.
38347 o Work around a tsocks bug: do a socks reject when AP connection dies
38348 early, else tsocks goes into an infinite loop.
38351 Changes in version 0.0.4 - 2004-03-26
38352 o When connecting to a dirserver or OR and the network is down,
38356 Changes in version 0.0.3 - 2004-03-26
38357 o Warn and fail if server chose a nickname with illegal characters
38358 o Port to Solaris and Sparc:
38359 - include missing header fcntl.h
38360 - have autoconf find -lsocket -lnsl automatically
38361 - deal with hardware word alignment
38362 - make uname() work (solaris has a different return convention)
38363 - switch from using signal() to sigaction()
38364 o Preliminary work on reputation system:
38365 - Keep statistics on success/fail of connect attempts; they're published
38366 by kill -USR1 currently.
38367 - Add a RunTesting option to try to learn link state by creating test
38368 circuits, even when SocksPort is off.
38369 - Remove unused open circuits when there are too many.
38372 Changes in version 0.0.2 - 2004-03-19
38373 - Include strlcpy and strlcat for safer string ops
38374 - define INADDR_NONE so we compile (but still not run) on solaris
38377 Changes in version 0.0.2pre27 - 2004-03-14
38379 - Allow internal tor networks (we were rejecting internal IPs,
38380 now we allow them if they're set explicitly).
38381 - And fix a few endian issues.
38384 Changes in version 0.0.2pre26 - 2004-03-14
38386 - If a stream times out after 15s without a connected cell, don't
38387 try that circuit again: try a new one.
38388 - Retry streams at most 4 times. Then give up.
38389 - When a dirserver gets a descriptor from an unknown router, it
38390 logs its fingerprint (so the dirserver operator can choose to
38391 accept it even without mail from the server operator).
38392 - Inform unapproved servers when we reject their descriptors.
38393 - Make tor build on Windows again. It works as a client, who knows
38395 - Clearer instructions in the torrc for how to set up a server.
38396 - Be more efficient about reading fd's when our global token bucket
38397 (used for rate limiting) becomes empty.
38399 - Stop asserting that computers always go forward in time. It's
38401 - When we sent a cell (e.g. destroy) and then marked an OR connection
38402 expired, we might close it before finishing a flush if the other
38403 side isn't reading right then.
38404 - Don't allow dirservers to start if they haven't defined
38405 RecommendedVersions
38406 - We were caching transient dns failures. Oops.
38407 - Prevent servers from publishing an internal IP as their address.
38408 - Address a strcat vulnerability in circuit.c
38411 Changes in version 0.0.2pre25 - 2004-03-04
38413 - Put the OR's IP in its router descriptor, not its fqdn. That way
38414 we'll stop being stalled by gethostbyname for nodes with flaky dns,
38417 - If the user typed in an address that didn't resolve, the server
38421 Changes in version 0.0.2pre24 - 2004-03-03
38423 - Fix an assertion failure in dns.c, where we were trying to dequeue
38424 a pending dns resolve even if it wasn't pending
38425 - Fix a spurious socks5 warning about still trying to write after the
38426 connection is finished.
38427 - Hold certain marked_for_close connections open until they're finished
38428 flushing, rather than losing bytes by closing them too early.
38429 - Correctly report the reason for ending a stream
38430 - Remove some duplicate calls to connection_mark_for_close
38431 - Put switch_id and start_daemon earlier in the boot sequence, so it
38432 will actually try to chdir() to options.DataDirectory
38433 - Make 'make test' exit(1) if a test fails; fix some unit tests
38434 - Make tor fail when you use a config option it doesn't know about,
38435 rather than warn and continue.
38436 - Make --version work
38437 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
38440 Changes in version 0.0.2pre23 - 2004-02-29
38442 - Print a statement when the first circ is finished, so the user
38443 knows it's working.
38444 - If a relay cell is unrecognized at the end of the circuit,
38445 send back a destroy. (So attacks to mutate cells are more
38447 - New config option 'excludenodes' to avoid certain nodes for circuits.
38448 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
38449 so you can collect coredumps there.
38451 - Fix a bug in tls flushing where sometimes data got wedged and
38452 didn't flush until more data got sent. Hopefully this bug was
38453 a big factor in the random delays we were seeing.
38454 - Make 'connected' cells include the resolved IP, so the client
38455 dns cache actually gets populated.
38456 - Disallow changing from ORPort=0 to ORPort>0 on hup.
38457 - When we time-out on a stream and detach from the circuit, send an
38458 end cell down it first.
38459 - Only warn about an unknown router (in exitnodes, entrynodes,
38460 excludenodes) after we've fetched a directory.
38463 Changes in version 0.0.2pre22 - 2004-02-26
38465 - Servers publish less revealing uname information in descriptors.
38466 - More memory tracking and assertions, to crash more usefully when
38468 - If the default torrc isn't there, just use some default defaults.
38469 Plus provide an internal dirservers file if they don't have one.
38470 - When the user tries to use Tor as an http proxy, give them an http
38471 501 failure explaining that we're a socks proxy.
38472 - Dump a new router.desc on hup, to help confused people who change
38473 their exit policies and then wonder why router.desc doesn't reflect
38475 - Clean up the generic tor.sh init script that we ship with.
38477 - If the exit stream is pending on the resolve, and a destroy arrives,
38478 then the stream wasn't getting removed from the pending list. I
38479 think this was the one causing recent server crashes.
38480 - Use a more robust poll on OSX 10.3, since their poll is flaky.
38481 - When it couldn't resolve any dirservers, it was useless from then on.
38482 Now it reloads the RouterFile (or default dirservers) if it has no
38484 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
38485 many users don't even *have* a /usr/local/sbin/.
38488 Changes in version 0.0.2pre21 - 2004-02-18
38490 - There's a ChangeLog file that actually reflects the changelog.
38491 - There's a 'torify' wrapper script, with an accompanying
38492 tor-tsocks.conf, that simplifies the process of using tsocks for
38493 tor. It even has a man page.
38494 - The tor binary gets installed to sbin rather than bin now.
38495 - Retry streams where the connected cell hasn't arrived in 15 seconds
38496 - Clean up exit policy handling -- get the default out of the torrc,
38497 so we can update it without forcing each server operator to fix
38499 - Allow imaps and pop3s in default exit policy
38501 - Prevent picking middleman nodes as the last node in the circuit
38504 Changes in version 0.0.2pre20 - 2004-01-30
38506 - We now have a deb package, and it's in debian unstable. Go to
38507 it, apt-getters. :)
38508 - I've split the TotalBandwidth option into BandwidthRate (how many
38509 bytes per second you want to allow, long-term) and
38510 BandwidthBurst (how many bytes you will allow at once before the cap
38511 kicks in). This better token bucket approach lets you, say, set
38512 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
38513 performance while not exceeding your monthly bandwidth quota.
38514 - Push out a tls record's worth of data once you've got it, rather
38515 than waiting until you've read everything waiting to be read. This
38516 may improve performance by pipelining better. We'll see.
38517 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
38518 from failed circuits (if they haven't been connected yet) and attach
38520 - Expire old streams that haven't managed to connect. Some day we'll
38521 have them reattach to new circuits instead.
38524 - Fix several memory leaks that were causing servers to become bloated
38526 - Fix a few very rare assert triggers. A few more remain.
38527 - Setuid to User _before_ complaining about running as root.
38530 Changes in version 0.0.2pre19 - 2004-01-07
38532 - Fix deadlock condition in dns farm. We were telling a child to die by
38533 closing the parent's file descriptor to him. But newer children were
38534 inheriting the open file descriptor from the parent, and since they
38535 weren't closing it, the socket never closed, so the child never read
38536 eof, so he never knew to exit. Similarly, dns workers were holding
38537 open other sockets, leading to all sorts of chaos.
38538 - New cleaner daemon() code for forking and backgrounding.
38539 - If you log to a file, it now prints an entry at the top of the
38540 logfile so you know it's working.
38541 - The onionskin challenge length was 30 bytes longer than necessary.
38542 - Started to patch up the spec so it's not quite so out of date.
38545 Changes in version 0.0.2pre18 - 2004-01-02
38547 - Fix endian issues with the 'integrity' field in the relay header.
38548 - Fix a potential bug where connections in state
38549 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
38552 Changes in version 0.0.2pre17 - 2003-12-30
38554 - Made --debuglogfile (or any second log file, actually) work.
38555 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
38556 adversary could force us into an infinite loop.
38559 - Each onionskin handshake now includes a hash of the computed key,
38560 to prove the server's identity and help perfect forward secrecy.
38561 - Changed cell size from 256 to 512 bytes (working toward compatibility
38563 - Changed cell length to 2 bytes, and moved it to the relay header.
38564 - Implemented end-to-end integrity checking for the payloads of
38566 - Separated streamid from 'recognized' (otherwise circuits will get
38567 messed up when we try to have streams exit from the middle). We
38568 use the integrity-checking to confirm that a cell is addressed to
38570 - Randomize the initial circid and streamid values, so an adversary who
38571 breaks into a node can't learn how many circuits or streams have
38575 Changes in version 0.0.2pre16 - 2003-12-14
38577 - Fixed a bug that made HUP trigger an assert
38578 - Fixed a bug where a circuit that immediately failed wasn't being
38579 counted as a failed circuit in counting retries.
38582 - Now we close the circuit when we get a truncated cell: otherwise we're
38583 open to an anonymity attack where a bad node in the path truncates
38584 the circuit and then we open streams at him.
38585 - Add port ranges to exit policies
38586 - Add a conservative default exit policy
38587 - Warn if you're running tor as root
38588 - on HUP, retry OR connections and close/rebind listeners
38589 - options.EntryNodes: try these nodes first when picking the first node
38590 - options.ExitNodes: if your best choices happen to include any of
38591 your preferred exit nodes, you choose among just those preferred
38593 - options.ExcludedNodes: nodes that are never picked in path building
38596 Changes in version 0.0.2pre15 - 2003-12-03
38597 o Robustness and bugfixes:
38598 - Sometimes clients would cache incorrect DNS resolves, which would
38599 really screw things up.
38600 - An OP that goes offline would slowly leak all its sockets and stop
38602 - A wide variety of bugfixes in exit node selection, exit policy
38603 handling, and processing pending streams when a new circuit is
38605 - Pick nodes for a path only from those the directory says are up
38606 - Choose randomly from all running dirservers, not always the first one
38607 - Increase allowed http header size for directory fetch.
38608 - Stop writing to stderr (if we're daemonized it will be closed).
38609 - Enable -g always, so cores will be more useful to me.
38610 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
38613 - Wrote a man page. It lists commonly used options.
38616 - Change default loglevel to warn.
38617 - Make PidFile default to null rather than littering in your CWD.
38618 - OnionRouter config option is now obsolete. Instead it just checks
38620 - Moved to a single unified torrc file for both clients and servers.
38623 Changes in version 0.0.2pre14 - 2003-11-29
38624 o Robustness and bugfixes:
38625 - Force the admin to make the DataDirectory himself
38626 - to get ownership/permissions right
38627 - so clients no longer make a DataDirectory and then never use it
38628 - fix bug where a client who was offline for 45 minutes would never
38629 pull down a directory again
38630 - fix (or at least hide really well) the dns assert bug that was
38631 causing server crashes
38632 - warnings and improved robustness wrt clockskew for certs
38633 - use the native daemon(3) to daemonize, when available
38634 - exit if bind() fails
38635 - exit if neither socksport nor orport is defined
38636 - include our own tor_timegm (Win32 doesn't have its own)
38637 - bugfix for win32 with lots of connections
38638 - fix minor bias in PRNG
38639 - make dirserver more robust to corrupt cached directory
38642 - Wrote the design document (woo)
38644 o Circuit building and exit policies:
38645 - Circuits no longer try to use nodes that the directory has told them
38647 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
38648 bitcounts (18.0.0.0/8).
38649 - Make AP connections standby for a circuit if no suitable circuit
38650 exists, rather than failing
38651 - Circuits choose exit node based on addr/port, exit policies, and
38652 which AP connections are standing by
38653 - Bump min pathlen from 2 to 3
38654 - Relay end cells have a payload to describe why the stream ended.
38655 - If the stream failed because of exit policy, try again with a new
38657 - Clients have a dns cache to remember resolved addresses.
38658 - Notice more quickly when we have no working circuits
38661 - APPort is now called SocksPort
38662 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
38664 - RecommendedVersions is now a config variable rather than
38665 hardcoded (for dirservers)
38666 - Reloads config on HUP
38667 - Usage info on -h or --help
38668 - If you set User and Group config vars, it'll setu/gid to them.
38671 Changes in version 0.0.2pre13 - 2003-10-19
38672 o General stability:
38673 - SSL_write no longer fails when it returns WANTWRITE and the number
38674 of bytes in the buf has changed by the next SSL_write call.
38675 - Fix segfault fetching directory when network is down
38676 - Fix a variety of minor memory leaks
38677 - Dirservers reload the fingerprints file on HUP, so I don't have
38678 to take down the network when I approve a new router
38679 - Default server config file has explicit Address line to specify fqdn
38682 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
38683 - Make listener connections not ever alloc bufs
38685 o Autoconf improvements:
38686 - don't clobber an external CFLAGS in ./configure
38687 - Make install now works
38688 - create var/lib/tor on make install
38689 - autocreate a tor.sh initscript to help distribs
38690 - autocreate the torrc and sample-server-torrc with correct paths
38692 o Log files and Daemonizing now work:
38693 - If --DebugLogFile is specified, log to it at -l debug
38694 - If --LogFile is specified, use it instead of commandline
38695 - If --RunAsDaemon is set, tor forks and backgrounds on startup