USN-1011-3: Xulrunner vulnerability

29 October 2010

xulrunner-1.9.1, xulrunner-1.9.2 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


A Xulrunner application could be made to run programs as your login if it opened a specially crafted file.

Software Description

  • xulrunner-1.9.2 - XUL + XPCOM application runner
  • xulrunner-1.9.1 - XUL + XPCOM application runner


USN-1011-1 fixed a vulnerability in Firefox. This update provides the corresponding update for Xulrunner.

Original advisory details:

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
xulrunner-1.9.2 -
Ubuntu 10.04 LTS
xulrunner-1.9.2 -
Ubuntu 9.10
xulrunner-1.9.1 -
xulrunner-1.9.2 -
Ubuntu 8.04 LTS
xulrunner-1.9.2 -

To update your system, please follow these instructions:

After a standard system update you need to restart any applications that use Xulrunner to make all the necessary changes.