Ubuntu Security Notice 957-1 – Several flaws were discovered in the browser engine of Firefox. If a user were tricked into viewing a malicious site, a remote attacker could use this to crash the browser or possibly run arbitrary code as the user invoking the program. Various integer overflows and other issues have also been addressed.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92097/USN-957-1.txt
Source: https://packetstormsecurity.com/files/92097/Ubuntu-Security-Notice-957-1.html