BIND before 9.2.6-P1 and 9.3.x before 9.3.2-P1 allows remote attackers to cause a denial of service (crash) via certain SIG queries, which cause an assertion failure when multiple RRsets are returned.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28745
http://www.ubuntu.com/usn/usn-343-1
http://www.openbsd.org/errata.html
http://www.kb.cert.org/vuls/id/915404
http://security.gentoo.org/glsa/glsa-200609-11.xml
http://security.freebsd.org/advisories/FreeBSD-SA-06:20.bind.asc
http://lists.apple.com/archives/security-announce/2007/May/msg00004.html