USN-3862-1: Irssi vulnerability

17 January 2019

irssi vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


Irssi could be made to crash or execute arbitrary code if it received a specially crafted input.

Software Description

  • irssi - terminal based IRC client


It was discovered that Irssi incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service or to execute arbitrary code.

Update instructions

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

Ubuntu 18.10
irssi - 1.1.1-1ubuntu1.1
Ubuntu 18.04 LTS
irssi - 1.0.5-1ubuntu4.1
Ubuntu 16.04 LTS
irssi - 0.8.19-1ubuntu1.8
Ubuntu 14.04 LTS
irssi - 0.8.15-5ubuntu3.6

To update your system, please follow these instructions:

After a standard system update you need to restart Irssi to make all the necessary changes.