Ubuntu Security Notice USN-706-1 – It was discovered that Bind did not properly perform certificate verification. When DNSSEC with DSA certificates are in use, a remote attacker could exploit this to bypass certificate validation 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/73695/USN-706-1.txt
Source: https://packetstormsecurity.com/files/73695/Ubuntu-Security-Notice-706-1.html