Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.
http://lists.suse.com/archive/suse-security-announce/2006-Nov/0007.html
http://secunia.com/advisories/22824
http://secunia.com/advisories/22903
http://secunia.com/advisories/22976
https://exchange.xforce.ibmcloud.com/vulnerabilities/30270