USN-3465-1: Irssi vulnerabilities

26 October 2017

irssi vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.10
  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Irssi.

Software Description

  • irssi - terminal based IRC client

Details

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)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 17.10
irssi - 1.0.4-1ubuntu2.1
Ubuntu 17.04
irssi - 0.8.20-2ubuntu2.2
Ubuntu 16.04 LTS
irssi - 0.8.19-1ubuntu1.5
Ubuntu 14.04 LTS
irssi - 0.8.15-5ubuntu3.3

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.

References