Debian Security Advisory DSA 988-1 – Several vulnerabilities have been discovered in Squirrelmail, a commonly used webmail system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/44486/dsa-988-1.txt
Source: https://packetstormsecurity.com/files/44486/Debian-Linux-Security-Advisory-988-1.html