Bug 1473234 (CVE-2017-10966) - CVE-2017-10966 irssi: Use-after-free while updating the internal nick list
Summary: CVE-2017-10966 irssi: Use-after-free while updating the internal nick list
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-10966
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1473235
TreeView+ depends on / blocked
 
Reported: 2017-07-20 09:35 UTC by Andrej Nemec
Modified: 2021-02-17 01:52 UTC (History)
4 users (show)

Fixed In Version: irssi 1.0.4
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Environment:
Last Closed: 2017-07-24 09:51:08 UTC
Embargoed:

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Description Andrej Nemec 2017-07-20 09:35:36 UTC 
An issue was discovered in Irssi. While updating the internal nick list, Irssi could incorrectly use the GHashTable interface and free the nick while updating it. This would then result in use-after-free conditions on each access of the hash table.

Upstream patch:

https://github.com/irssi/irssi/commit/5e26325317c72a04c1610ad952974e206384d291

External References:

https://irssi.org/security/irssi_sa_2017_07.txt
Comment 1 Cedric Buissart 2017-07-24 09:50:48 UTC 
Lowering severity based on the fact that a rogue IRC server would be needed to take advantage of the vulnerability.
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