VULHUB ™

Raptor Firewall is a commercially available firewall implementation distributed by Symantec. A problem with the handling of UDP packets by the firewall has been discovered. When the firewall receives zero length UDP packets, the machine hosting the firewall becomes processor bound, with the firewall taking 100% of the CPU. This makes it possible for a remote user to crash the firewall, denying service to legitimate users of network resources. A reboot is required for the system to resume normal operation.

Raptor Firewall is a commercially available firewall implementation distributed by Symantec. A problem with the handling of UDP packets by the firewall has been discovered. When the firewall receives zero length UDP packets, the machine hosting the firewall becomes processor bound, with the firewall taking 100% of the CPU. This makes it possible for a remote user to crash the firewall, denying service to legitimate users of network resources. A reboot is required for the system to resume normal operation.