source: http://www.securityfocus.com/bid/16298/info

Dual DHCP DNS Server is prone to a remote buffer overflow vulnerability.

The vulnerability presents itself when the server handles excessive data through the DHCP options field.

Successful exploitation can allow attackers to trigger a denial of service condition or execute arbitrary code to gain unauthorized remote access in the context of the affected server.

Dual DHCP DNS Server 1.0 is reported to be affected. 

http://www.exploit-db.com/sploits/27108.zip