Ubuntu Security Notice USN-550-2
10th December, 2007
libcairo regression
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.10
- Ubuntu 7.04
Software description
- libcairo
Details
USN-550-1 fixed vulnerabilities in Cairo. The upstream fixes were incomplete,
and under certain situations, applications using Cairo would crash with a
floating point error. 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 version:
- Ubuntu 7.10:
- libcairo2 1.4.10-1ubuntu4.2
- Ubuntu 7.04:
- libcairo2 1.4.2-0ubuntu1.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to restart your session to effect
the necessary changes.