USN-1402-1: libpng vulnerability

Ubuntu Security Notice USN-1402-1

22nd March, 2012

libpng vulnerability

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

Summary

libpng could be made to crash or run programs as your login if it opened a specially crafted file.

Software description

  • libpng - PNG (Portable Network Graphics) file library

Details

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
program.

Update instructions

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

Ubuntu 11.10:
libpng12-0 1.2.46-3ubuntu1.2
Ubuntu 11.04:
libpng12-0 1.2.44-1ubuntu3.3
Ubuntu 10.10:
libpng12-0 1.2.44-1ubuntu0.3
Ubuntu 10.04 LTS:
libpng12-0 1.2.42-1ubuntu2.4
Ubuntu 8.04 LTS:
libpng12-0 1.2.15~beta5-3ubuntu0.6

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2011-3045