USN-3184-1: Irssi vulnerabilities

Ubuntu Security Notice USN-3184-1

1st February, 2017

irssi vulnerabilities

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

• Ubuntu 16.10



• Ubuntu 16.04 LTS



• Ubuntu 14.04 LTS



• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in Irssi.

Software description

• irssi
  - terminal based IRC client
  
  

Details

It was discovered that the Irssi buf.pl script set incorrect permissions. A
local attacker could use this issue to retrieve another user's window
contents. ()

It was discovered that Irssi incorrectly handled invalid nick messages. A
remote attacker could use this issue to cause Irssi to crash, resulting in
a denial of service, or possibly execute arbitrary code. ()

Hanno Böck and Joseph Bisch discovered that Irssi incorrectly handled
certain incomplete character sequences. A remote attacker could use this
issue to cause Irssi to crash, resulting in a denial of service. This issue
only affected Ubuntu 16.04 LTS and Ubuntu 16.10. ()

Update instructions

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

Ubuntu 16.10:

Ubuntu 16.04 LTS:

Ubuntu 14.04 LTS:

Ubuntu 12.04 LTS:

To update your system, please follow these instructions:
,

,

,

CVE-2017-5356