Ubuntu Security Notice USN-538-1
25th October, 2007
libpng vulnerabilities
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
- libpng
Details
It was discovered that libpng did not properly perform bounds checking
and comparisons in certain operations. An attacker could send a specially
crafted PNG image and cause a denial of service in applications linked
against libpng.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 7.10:
- libpng12-0 1.2.15~beta5-2ubuntu0.1
- Ubuntu 7.04:
- libpng12-0 1.2.15~beta5-1ubuntu1.1
- Ubuntu 6.10:
- libpng12-0 1.2.8rel-5.1ubuntu0.3
- Ubuntu 6.06 LTS:
- libpng12-0 1.2.8rel-5ubuntu0.3
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system upgrade you need to reboot your computer to
effect the necessary changes.