Ubuntu Security Notice USN-1402-1
March 22, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
libpng could be made to crash or run programs as your login if it
opened a specially crafted file.
- libpng: PNG (Portable Network Graphics) file library
It was discovered that libpng did not properly process compressed chunks.
If a user or automated system using libpng were tricked into opening a
specially crafted image, an attacker could exploit this to cause a denial
of service or execute code with the privileges of the user invoking the
The problem can be corrected by updating your system to the following
Ubuntu 10.04 LTS:
Ubuntu 8.04 LTS:
After a standard system update you need to restart your session to make all
the necessary changes.