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, disclose sensitive information, or compromise a user’s system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75926/sa34387.txt
Source: https://packetstormsecurity.com/files/75926/Secunia-Security-Advisory-34387.html