Several security issues were fixed in Irssi.
Brian Carpenter discovered that Irssi incorrectly handled messages with invalid time stamps. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-10965)
26 October 2017
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Irssi.
Brian Carpenter discovered that Irssi incorrectly handled messages with invalid time stamps. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-10965)
Brian Carpenter discovered that Irssi incorrectly handled the internal nick list. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-10966)
Joseph Bisch discovered that Irssi incorrectly removed destroyed channels from the query list. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-15227)
Hanno Böck discovered that Irssi incorrectly handled themes. If a user were tricked into using a malicious theme, a attacker could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-15228)
Joseph Bisch discovered that Irssi incorrectly handled certain DCC CTCP messages. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-15721)
Joseph Bisch discovered that Irssi incorrectly handled certain channel IDs. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-15722)
Joseph Bisch discovered that Irssi incorrectly handled certain long nicks or targets. A malicious IRC server could use this issue to cause Irssi to crash, resulting in a denial of service. (CVE-2017-15723)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Irssi to make all the necessary changes.
Vulmon