USN-1316-1: t1lib vulnerability

21 December 2011

t1lib vulnerability

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

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


t1lib could be made to crash or run programs as your login if it opened a specially crafted font file.

Software Description

  • t1lib - Type 1 font rasterizer library - runtime


Jonathan Brossard discovered that t1lib did not correctly handle certain malformed font files. If a user were tricked into using a specially crafted font file, a remote attacker could cause t1lib to crash or possibly execute arbitrary code with user privileges.

Update instructions

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

Ubuntu 11.10
libt1-5 - 5.1.2-3ubuntu0.11.10.1
Ubuntu 11.04
libt1-5 - 5.1.2-3ubuntu0.11.04.1
Ubuntu 10.10
libt1-5 - 5.1.2-3ubuntu0.10.10.1
Ubuntu 10.04 LTS
libt1-5 - 5.1.2-3ubuntu0.10.04.1

To update your system, please follow these instructions:

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