Secunia Security Advisory – Ubuntu has issued an update for thunderbird. This fixes some vulnerabilities, which can be exploited by malicious people to bypass certain security restrictions and compromise a user’s system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/92208/sa40694.txt
Source: https://packetstormsecurity.com/files/92208/Secunia-Security-Advisory-40694.html