Core Security Technologies Advisory – A vulnerability found in OpenBSD’s dhcpd allows attackers on the local network to remotely cause the DHCP server to corrupt its process memory and crash; or continue functioning erratically thus denying service to all DHCP clients on the network and, if PF updates are in use, potentially affecting egress/ingress filtering as well. OpenBSD 4.0, 4.1, and 4.2 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60009/CORE-2007-0928.txt
Source: https://packetstormsecurity.com/files/60009/Core-Security-Technologies-Advisory-2007.0928.html