USN-913-1: libpng vulnerabilities

16 March 2010

libpng vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.10
  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • libpng

Details

It was discovered that libpng did not properly initialize memory when decoding certain 1-bit interlaced images. If a user or automated system were tricked into processing crafted PNG images, an attacker could possibly use this flaw to read sensitive information stored in memory. This issue only affected Ubuntu 6.06 LTS, 8.04 LTS, 8.10 and 9.04. (CVE-2009-2042)

It was discovered that libpng did not properly handle certain excessively compressed PNG images. If a user or automated system were tricked into processing a crafted PNG image, an attacker could possibly use this flaw to consume all available resources, resulting in a denial of service. (CVE-2010-0205)

Update instructions

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

Ubuntu 9.10
libpng12-0 - 1.2.37-1ubuntu0.1
Ubuntu 9.04
libpng12-0 - 1.2.27-2ubuntu2.1
Ubuntu 8.10
libpng12-0 - 1.2.27-1ubuntu0.2
Ubuntu 8.04 LTS
libpng12-0 - 1.2.15~beta5-3ubuntu0.2
Ubuntu 6.06 LTS
libpng12-0 - 1.2.8rel-5ubuntu0.5

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.

References