Debian Security Advisory DSA 868-1 – Several security-related problems have been discovered in Mozilla and derived programs. Some of the following problems don’t exactly apply to Mozilla Thunderbird, even though the code is present. In order to keep the codebase in sync with upstream it has been altered nevertheless.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40898/dsa-868-1.txt
Source: https://packetstormsecurity.com/files/40898/Debian-Linux-Security-Advisory-868-1.html