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AUSCERT External Security Bulletin Redistribution
ESB-2017.2821
irssi security update
6 November 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: irssi
Publisher: Debian
Operating System: Debian GNU/Linux 8
Debian GNU/Linux 9
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-15723 CVE-2017-15722 CVE-2017-15721
CVE-2017-15228 CVE-2017-15227 CVE-2017-10966
CVE-2017-10965
Reference: ESB-2017.2720
ESB-2017.2668
Original Bulletin:
http://www.debian.org/security/2017/dsa-4016
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Debian Security Advisory DSA-4016-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
November 03, 2017 https://www.debian.org/security/faq
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Package : irssi
CVE ID : CVE-2017-10965 CVE-2017-10966 CVE-2017-15227 CVE-2017-15228
CVE-2017-15721 CVE-2017-15722 CVE-2017-15723
Debian Bug : 867598 879521
Multiple vulnerabilities have been discovered in Irssi, a terminal based
IRC client. The Common Vulnerabilities and Exposures project identifies
the following problems:
CVE-2017-10965
Brian 'geeknik' Carpenter of Geeknik Labs discovered that Irssi does
not properly handle receiving messages with invalid time stamps. A
malicious IRC server can take advantage of this flaw to cause Irssi
to crash, resulting in a denial of service.
CVE-2017-10966
Brian 'geeknik' Carpenter of Geeknik Labs discovered that Irssi is
susceptible to a use-after-free flaw triggered while updating the
internal nick list. A malicious IRC server can take advantage of
this flaw to cause Irssi to crash, resulting in a denial of service.
CVE-2017-15227
Joseph Bisch discovered that while waiting for the channel
synchronisation, Irssi may incorrectly fail to remove destroyed
channels from the query list, resulting in use after free conditions
when updating the state later on. A malicious IRC server can take
advantage of this flaw to cause Irssi to crash, resulting in a
denial of service.
CVE-2017-15228
Hanno Boeck reported that Irssi does not properly handle installing
themes with unterminated colour formatting sequences, leading to a
denial of service if a user is tricked into installing a specially
crafted theme.
CVE-2017-15721
Joseph Bisch discovered that Irssi does not properly handle
incorrectly formatted DCC CTCP messages. A malicious IRC server can
take advantage of this flaw to cause Irssi to crash, resulting in a
denial of service.
CVE-2017-15722
Joseph Bisch discovered that Irssi does not properly verify Safe
channel IDs. A malicious IRC server can take advantage of this flaw
to cause Irssi to crash, resulting in a denial of service.
CVE-2017-15723
Joseph Bisch reported that Irssi does not properly handle overlong
nicks or targets resulting in a NULL pointer dereference when
splitting the message and leading to a denial of service.
For the oldstable distribution (jessie), these problems have been fixed
in version 0.8.17-1+deb8u5.
For the stable distribution (stretch), these problems have been fixed in
version 1.0.2-1+deb9u3. CVE-2017-10965 and CVE-2017-10966 were already
fixed in an earlier point release.
We recommend that you upgrade your irssi packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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