ISC BIND 9.8.x before 9.8.0-P1, when Response Policy Zones (RPZ) RRset replacement is enabled, allows remote attackers to cause a denial of service (assertion failure and daemon exit) via an RRSIG query.
https://www.isc.org/CVE-2011-1907
https://exchange.xforce.ibmcloud.com/vulnerabilities/67297
http://www.vupen.com/english/advisories/2011/1183
http://www.securitytracker.com/id?1025503
http://www.securityfocus.com/bid/47734
http://www.securityfocus.com/archive/1/517900/100/0/threaded