USN-2211-1: libXfont vulnerabilities

14 May 2014

libxfont vulnerabilities

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

  • Ubuntu 14.04 LTS
  • Ubuntu 13.10
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in libXfont.

Software Description

  • libxfont - X11 font rasterisation library

Details

Ilja van Sprundel discovered that libXfont incorrectly handled font metadata file parsing. A local attacker could use this issue to cause libXfont to crash, or possibly execute arbitrary code in order to gain privileges. (CVE-2014-0209)

Ilja van Sprundel discovered that libXfont incorrectly handled X Font Server replies. A malicious font server could return specially-crafted data that could cause libXfont to crash, or possibly execute arbitrary code. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS, Ubuntu 12.10 and Ubuntu 13.10. (CVE-2014-0210, CVE-2014-0211)

Update instructions

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

Ubuntu 14.04 LTS
libxfont1 - 1:1.4.7-1ubuntu0.1
Ubuntu 13.10
libxfont1 - 1:1.4.6-1ubuntu0.2
Ubuntu 12.10
libxfont1 - 1:1.4.5-2ubuntu0.12.10.2
Ubuntu 12.04 LTS
libxfont1 - 1:1.4.4-1ubuntu0.2
Ubuntu 10.04 LTS
libxfont1 - 1:1.4.1-1ubuntu0.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the necessary changes.

References