Secunia Security Advisory – Some vulnerabilities have been reported in the CMU Sieve plugin for Dovecot, which can be exploited by malicious users to potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/81254/sa36698.txt
Source: https://packetstormsecurity.com/files/81254/Secunia-Security-Advisory-36698.html