PowerDNS Authoritative Server Long Qname Denial Of Service Vulnerability (CVE-2016-5426)

A denial-of-service vulnerability exists in PowerDNS Authoritative Server. The vulnerability is due to an error in processing queries with overly long qnames. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted DNS packet to the target application. A successful attack could lead to excessive resources being consumed, resulting in a denial of service condition.