dkim-milter 2.6.0 through 2.8.0 allows remote attackers to cause a denial of service (crash) by signing a message with a key that has been revoked in DNS, which triggers an assertion error.
https://exchange.xforce.ibmcloud.com/vulnerabilities/48085
http://www.securityfocus.com/bid/33337
http://www.openwall.com/lists/oss-security/2009/03/01/1
http://www.debian.org/security/2009/dsa-1728
http://sourceforge.net/project/shownotes.php?release_id=654247