Ubuntu Security Notice USN-4671-1

Ubuntu Security Notice 4671-1 - Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass the CSS sanitizer, bypass security restrictions, spoof the URL bar, or execute arbitrary code. Various other issues were also addressed.
Ubuntu Security Notice USN-4671-1