bind: DoS (assertion failure) via nsupdate packets

The dnsdbfindrdataset function in db.c in named in ISC BIND 9.4 before 9.4.3-P3, 9.5 before 9.5.1-P3, and 9.6 before 9.6.1-P1, when configured as a master server, allows remote attackers to cause a denial of service assertion failure and daemon exit via an ANY record in the prerequisite section o...