Ubuntu Security Notice USN-2063-1
http://packetstormsecurity.com/files/124533/USN-2063-1.txt
Ubuntu Security Notice 2063-1 - It was discovered that an intermediate certificate was incorrectly issued by a subordinate certificate authority of a trusted CA included in NSS. This intermediate certificate could be used in a man-in-the-middle attack, and has such been marked as untrusted in this update.