Ubuntu Security Notice 418-1 – A flaw was discovered in Bind’s DNSSEC validation code. Remote attackers could send a specially crafted DNS query which would cause the Bind server to crash, resulting in a denial of service. Only servers configured to use DNSSEC extensions were vulnerable.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/54217/USN-418-1.txt
Source: https://packetstormsecurity.com/files/54217/Ubuntu-Security-Notice-418-1.html