CVE-2012-5689

CVE-2012-5689 is a denial-of-service vulnerability affecting specific versions of ISC BIND (9.8.x through 9.8.4-P1 and 9.9.x through 9.9.2-P1) when configured with DNS64 and a Response Policy Zone lacking an AAAA rewrite rule. An unauthenticated remote attacker can trigger an assertion failure and crash the named daemon by sending a crafted AAAA record query. With a CVSS score of 7.1, this vulnerability is considered high severity due to its network-based attack vector and complete denial-of-service impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant media coverage, though it has received some community discussion.