Ubuntu Security Notice 930-6 – USN-957-1 fixed vulnerabilities in Firefox and Xulrunner. Daniel Holbert discovered that the fix for CVE-2010-1214 introduced a regression which did not properly initialize a plugin pointer. If a user were tricked into viewing a malicious site, a remote attacker could use this to crash the browser or run arbitrary code as the user invoking the program. This update fixes the problem.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92185/USN-930-6.txt
Source: https://packetstormsecurity.com/files/92185/Ubuntu-Security-Notice-930-6.html