Secunia Security Advisory – Debian has issued an update for squirrelmail. This fixes a vulnerability, which can be exploited by malicious users to disclose or manipulate sensitive information.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/49141/sa21586.txt
Source: https://packetstormsecurity.com/files/49141/Secunia-Security-Advisory-21586.html