USN-550-3: Cairo regression

13 December 2007

libcairo regression

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

  • Ubuntu 7.10
  • Ubuntu 7.04
  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Software Description

  • libcairo


USN-550-1 fixed vulnerabilities in Cairo. A bug in font glyph rendering was uncovered as a result of the new memory allocation routines. In certain situations, fonts containing characters with no width or height would not render any more. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Peter Valchev discovered that Cairo did not correctly decode PNG image data. By tricking a user or automated system into processing a specially crafted PNG with Cairo, a remote attacker could execute arbitrary code with user privileges.

Update instructions

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

Ubuntu 7.10
libcairo2 - 1.4.10-1ubuntu4.4
Ubuntu 7.04
libcairo2 - 1.4.2-0ubuntu1.3
Ubuntu 6.10
libcairo2 - 1.2.4-1ubuntu2.2
Ubuntu 6.06 LTS
libcairo2 - 1.0.4-0ubuntu1.2

To update your system, please follow these instructions:

After a standard system upgrade you need to restart your session to effect the necessary changes.