Ubuntu Security Notice USN-667-1 – A large amount of vulnerabilities have been addressed in Firefox. Flaws such as information disclosure, bypassing of same-origin checks, arbitrary code execution, and more exist in prior versions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/72042/USN-667-1.txt
Source: https://packetstormsecurity.com/files/72042/Ubuntu-Security-Notice-667-1.html