Template Security has discovered a serious denial of service vulnerability in the BlueCat Networks Adonis DNS/DHCP Appliance. When XHA is configured to place two Adonis servers in an active-passive pair to provide high availability, a remote attacker can transmit a single UDP datagram to crash the heartbeat control process. This can be used for example to create an active/active condition in the cluster pair.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/58176/TS-2007-001-0.txt
Source: https://packetstormsecurity.com/files/58176/TS-2007-001-0.txt.html