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use after free condition during netjoin processing [1]
======================================================
CWE Classification: CWE-416
CVE-2017-7191 [2] was assigned to this bug
Description
-----------
Use after free while producing list of netjoins (CWE-416)
This issue was found and reported to us by APic.
Impact
------
This issue usually leads to segmentation faults. Targeted code
execution should be difficult.
Affected versions
-----------------
Irssi up to and including 1.0.1
We believe Irssi 0.8.21 and prior are not affected since a different
code path causes the netjoins to be flushed prior to reaching the use
after free condition.
Fixed in
--------
Irssi 1.0.2
Recommended action
------------------
Upgrade to Irssi 1.0.2. Irssi 1.0.2 is a maintenance release
without any new features.
Patch
-----
https://github.com/irssi/irssi/commit/77b2631c78461965bc9a7414aae206b5c514e1b3
References
----------
[1] https://irssi.org/security/irssi_sa_2017_03.txt
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7191
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