USN-1402-1: libpng vulnerability

Releases

• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04
• Ubuntu 8.04

Packages

• 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 versions:

Ubuntu 8.04

• libpng12-0 - 1.2.15~beta5-3ubuntu0.6

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

• libpng12-0 - 1.2.42-1ubuntu2.4

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

References

• CVE-2011-3045