USN-1367-4: Xulrunner vulnerability

Ubuntu Security Notice USN-1367-4

17th February, 2012

xulrunner-1.9.2 vulnerability

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


Xulrunner based applications could be made to crash or run programs as your login if they opened a specially crafted file.

Software description

  • xulrunner-1.9.2 - Mozilla Gecko runtime environment


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

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 10.10:
Ubuntu 10.04 LTS:

To update your system, please follow these instructions:

After a standard system update you need to restart any application based on
Xulrunner such as Yelp or Conkeror to make all the necessary changes.


CVE-2011-3026, LP: 934073