USN-913-1: libpng vulnerabilities

Ubuntu Security Notice USN-913-1

16th 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 version:

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

CVE-2009-2042, CVE-2010-0205