Ubuntu Security Notice 627-1 – Dan Kaminsky discovered weaknesses in the DNS protocol as implemented by Dnsmasq. 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/68412/USN-627-1.txt
Source: https://packetstormsecurity.com/files/68412/Ubuntu-Security-Notice-627-1.html