Debian Security Advisory 1728-1 – It was discovered that dkim-milter, an implementation of the DomainKeys Identified Mail protocol, may crash during DKIM verification if it encounters a specially-crafted or revoked public key record in DNS.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/75260/dsa-1728-1.txt
Source: https://packetstormsecurity.com/files/75260/Debian-Linux-Security-Advisory-1728-1.html