USN-1011-1: Firefox vulnerability

28 October 2010

firefox, firefox-3.0, firefox-3.5 vulnerability

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 9.10
  • Ubuntu 8.04 LTS


Firefox could be made to run programs as your login if it opened a specially crafted web page.

Software Description

  • firefox - safe and easy web browser from Mozilla
  • firefox-3.5 - safe and easy web browser from Mozilla
  • firefox-3.0 - safe and easy web browser from Mozilla


Morten Krakvik discovered a heap-based buffer overflow in Firefox. If a user were tricked into navigating to a malicious site, an attacker could cause a denial of service or possibly execute arbitrary code as the user invoking the program.

Update instructions

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

Ubuntu 10.10
abrowser - 3.6.12+build1+nobinonly-0ubuntu0.10.10.1
firefox - 3.6.12+build1+nobinonly-0ubuntu0.10.10.1
Ubuntu 10.04 LTS
abrowser - 3.6.12+build1+nobinonly-0ubuntu0.10.04.1
firefox - 3.6.12+build1+nobinonly-0ubuntu0.10.04.1
Ubuntu 9.10
firefox-3.5 - 3.6.12+build1+nobinonly-0ubuntu0.9.10.1
Ubuntu 8.04 LTS
firefox-3.0 - 3.6.12+build1+nobinonly-0ubuntu0.8.04.1

To update your system, please follow these instructions:

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