Ubuntu: USN-1417-1 Moderate: Libpng Denial Of Service Threat

ubuntu

April 5, 2012

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

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 incorrectly handled certain memory

operations. 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.

Topics Covered

security advisory denial of service code execution moderate severity libpng ubuntu

Update Instructions

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

Ubuntu 11.10:
  libpng12-0                      1.2.46-3ubuntu1.3

Ubuntu 11.04:
  libpng12-0                      1.2.44-1ubuntu3.4

Ubuntu 10.10:
  libpng12-0                      1.2.44-1ubuntu0.4

Ubuntu 10.04 LTS:
  libpng12-0                      1.2.42-1ubuntu2.5

Ubuntu 8.04 LTS:
  libpng12-0                      1.2.15~beta5-3ubuntu0.7

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