Ubuntu Security Notice USN-717-1 – Several flaws were discovered in Firefox 3.0 and XULRunner 1.9. These range from denial of service to code execution vulnerabilities.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/74863/USN-717-1.txt
Source: https://packetstormsecurity.com/files/74863/Ubuntu-Security-Notice-717-1.html