The remote DNS server is vulnerable to a cache-poisoning attack.
The remote host is running a version of BIND DNS Server prior to 8.4.7-P1. This version of BIND is vulnerable to a flaw that would allow cache poisoning. An attacker exploiting this flaw would need to be able to manipulate the vulnerable DNS server into contacting a malicious DNS server. Successful exploitation would lead to a cache-poisoning attack.
BIND 8 is no longer supported by ISC. Upgrade or patch according to vendor recommendations.