Ubuntu Security Notice 865-1 – Michael Sinatra discovered that Bind did not correctly validate certain records added to its cache. When DNSSEC validation is in use, a remote attacker could exploit this to spoof DNS entries and poison DNS caches. Among other things, this could lead to misdirected email and web traffic.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/83538/USN-865-1.txt
Source: https://packetstormsecurity.com/files/83538/Ubuntu-Security-Notice-865-1.html