[tor-bugs] #20384 [Core Tor/Tor]: TROVE-2016-10-001: out-of-bounds read on buffer chunks (was: TROVE-2016-10-001)

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#20384: TROVE-2016-10-001: out-of-bounds read on buffer chunks
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 Reporter:  nickm         |          Owner:
     Type:  defect        |         Status:  closed
 Priority:  Very High     |      Milestone:  Tor: 0.2.9.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:  fixed
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Changes (by nickm):

 * status:  new => closed
 * resolution:   => fixed


Old description:

> Placeholder ticket; see #20383 for "TROVE" backronym.  Fix should go out
> in 0.2.9.4-alpha in the next 48 hours.  Severity is "Medium".

New description:

 Placeholder ticket; see #20383 for "TROVE" backronym.  Fix should go out
 in 0.2.9.4-alpha in the next 48 hours.  Severity is "Medium".

 This is fixed in 0.2.8.9 and 0.2.9.4-alpha.  The changelog says:

 {{{
   Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
   that would allow a remote attacker to crash a Tor client, hidden
   service, relay, or authority. All Tor users should upgrade to this
   version, or to 0.2.8.9. Patches will be released for older versions
   of Tor.

   o Major features (security fixes):
     - Prevent a class of security bugs caused by treating the contents
       of a buffer chunk as if they were a NUL-terminated string. At
       least one such bug seems to be present in all currently used
       versions of Tor, and would allow an attacker to remotely crash
       most Tor instances, especially those compiled with extra compiler
       hardening. With this defense in place, such bugs can't crash Tor,
       though we should still fix them as they occur. Closes ticket
       20384 (TROVE-2016-10-001).

 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20384#comment:1>
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