The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. https://www.isc.org/software/bind/advisories/cve-2011-2465 http://www.vuxml.org/freebsd/4ccee784-a721-11e0-89b4-001ec9578670.html

The following package is affected: bind98 CVE-2011-2465 Unspecified vulnerability in ISC BIND 9 9.8.0, 9.8.0-P1, 9.8.0-P2, and 9.8.1b1, when recursion is enabled and the Response Policy Zone (RPZ) contains DNAME or certain CNAME records, allows remote attackers to cause a denial of service (named daemon crash) via an unspecified query.