USN-1367-2: Firefox vulnerability

Ubuntu Security Notice USN-1367-2

17th February, 2012

firefox vulnerability

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

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


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

Software description

  • firefox - Mozilla Open Source web browser


USN-1367-1 fixed vulnerabilities in libpng. This provides the corresponding
update for Firefox.

Original advisory details:

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)

Update instructions

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

Ubuntu 11.10:
firefox 10.0.2+build1-0ubuntu0.11.10.1
Ubuntu 11.04:
firefox 10.0.2+build1-0ubuntu0.11.04.1
Ubuntu 10.10:
firefox 10.0.2+build1-0ubuntu0.10.10.1
Ubuntu 10.04 LTS:
firefox 10.0.2+build1-0ubuntu0.10.04.1

To update your system, please follow these instructions:

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


CVE-2011-3026, LP: 933293