query.c in NSD 3.0.x through 3.0.8, 3.1.x through 3.1.1, and 3.2.x before 3.2.12 allows remote attackers to cause a denial of service (NULL pointer dereference and child process crash) via a crafted DNS packet.
http://www.securityfocus.com/bid/54606
http://www.nlnetlabs.nl/downloads/CVE-2012-2978.txt
http://www.kb.cert.org/vuls/id/624931
http://www.debian.org/security/2012/dsa-2515
http://secunia.com/advisories/49997