The BIND 9 DNS name server is undergoing a concerted denial of service attack, according to this Internet Systems Consortium advisory. "Organizations across the Internet reported crashes interrupting service on BIND 9 nameservers performing recursive queries. Affected servers crashed after logging an error in query.c with the following message: "
November 17, 2011
BIND 9 Denial of Service Being Seen in the Wild
Read more at LWN