USN-3063-1: Fontconfig vulnerability

17 August 2016

fontconfig vulnerability

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

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Fontconfig be made to crash or run programs if it opened a specially crafted file.

Software Description

  • fontconfig - generic font configuration library


Tobias Stoeckmann discovered that Fontconfig incorrectly handled cache files. A local attacker could possibly use this issue with a specially crafted cache file to elevate privileges.

Update instructions

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

Ubuntu 16.04 LTS
fontconfig - 2.11.94-0ubuntu1.1
libfontconfig1 - 2.11.94-0ubuntu1.1
Ubuntu 14.04 LTS
fontconfig - 2.11.0-0ubuntu4.2
libfontconfig1 - 2.11.0-0ubuntu4.2
Ubuntu 12.04 LTS
fontconfig - 2.8.0-3ubuntu9.2
libfontconfig1 - 2.8.0-3ubuntu9.2

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.