Ubuntu 8.04 LTS: USN-1367-1 Critical Denial of Service in Libpng

ubuntu

February 16, 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 did not properly verify the embedded profile

length of iCCP chunks. An attacker could exploit this to cause a denial of

service via application crash. This issue only affected Ubuntu 8.04 LTS.

(CVE-2009-5063)

Jueri Aedla discovered that libpng did not properly verify the size used

when allocating memory during chunk decompression. 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. (CVE-2011-3026)

Topics Covered

security advisory denial of service Ubuntu libpng application crash

Update Instructions

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

Ubuntu 11.10:
  libpng12-0                      1.2.46-3ubuntu1.1

Ubuntu 11.04:
  libpng12-0                      1.2.44-1ubuntu3.2

Ubuntu 10.10:
  libpng12-0                      1.2.44-1ubuntu0.2

Ubuntu 10.04 LTS:
  libpng12-0                      1.2.42-1ubuntu2.3

Ubuntu 8.04 LTS:
  libpng12-0                      1.2.15~beta5-3ubuntu0.5

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