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USN-1402-1: libpng vulnerability

22 March 2012

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

Update instructions

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

Ubuntu 8.04
Ubuntu 11.10
Ubuntu 11.04
Ubuntu 10.10
Ubuntu 10.04

After a standard system update you need to restart your session to make all
the necessary changes.