Ubuntu Security Notice USN-728-3 – Jesse Ruderman and Gary Kwong discovered flaws in the browser engine. If a user were tricked into viewing a malicious website, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Georgi Guninski discovered a flaw when Firefox performed a cross-domain redirect. An attacker could bypass the same-origin policy in Firefox by utilizing nsIRDFService and steal private data from users authenticated to the redirected website.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75467/USN-728-3.txt
Source: https://packetstormsecurity.com/files/75467/Ubuntu-Security-Notice-728-3.html