Secunia Security Advisory – Debian has issued an update for dovecot. This fixes a vulnerability, which can be exploited by malicious people to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/64660/sa29385.txt
Source: https://packetstormsecurity.com/files/64660/Secunia-Security-Advisory-29385.html