[tor-bugs] #21357 [Core Tor/Tor]: potential bug: Some IPv6Exits do not add the ipv6-policy line to their descriptor

[Tor Bug Tracker & Wiki]

#21357: potential bug: Some IPv6Exits do not add the ipv6-policy line to their
descriptor
-------------------------------+------------------------------------
 Reporter:  cypherpunks        |          Owner:
     Type:  defect             |         Status:  needs_review
 Priority:  Medium             |      Milestone:  Tor: 0.2.9.x-final
Component:  Core Tor/Tor       |        Version:  Tor: 0.2.4.7-alpha
 Severity:  Major              |     Resolution:
 Keywords:  ipv6 029-backport  |  Actual Points:  1
Parent ID:                     |         Points:  2
 Reviewer:                     |        Sponsor:
-------------------------------+------------------------------------

Comment (by teor):

 Replying to [comment:9 cypherpunks]:
 > Thanks for the fast bug squashing.
 >
 > Replying to [comment:7 nickm]:
 > > This seems like the kind of bug we should be sure to fix in 0.3.0 if
 we can;
 >
 > Please consider also backporting it to 0.2.9.x.
 >
 > list of potentially (their IPv6Exit setting is unknown to me) affected
 IPv6 exits by major tor version:
 > {{{
 > +-------------+------------------+--------+
 > | tor_version | exit_probability | relays |
 > +-------------+------------------+--------+
 > | 0.2.9       |             14.5 |     50 |
 > | 0.3.0       |              4.4 |     18 |
 > | 0.2.7       |              3.0 |      8 |
 > | 0.2.8       |              2.1 |     17 |
 > | 0.2.5       |              0.4 |      7 |
 > | 0.2.4       |              0.1 |      1 |
 > +-------------+------------------+--------+
 > }}}
 > (the actual numbers can also be higher since I'm only looking at relays
 with IPv6 ORPort, but you can do IPv6 exiting without IPv6 ORPort)

 It is likely that 0.2.8 and later are affected, possible that 0.2.7 is
 affected, and unlikely that earlier versions are affected.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21357#comment:13>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online