VULHUB ™

Cisco IOS is reported susceptible to a remote denial of service vulnerability when handling specific DHCP packets. Reportedly, DHCP packets containing certain unspecified content have the capability to block the input queue of interfaces on affected devices. Once an input queue is blocked, further ARP, and routing protocol packets will not be processed. This condition can only be corrected by rebooting the affected device. An attacker with the ability to send malicious DHCP packets to an affected device may be able to interrupt the routing services of the affected device, potentially denying further network service to legitimate users.

Cisco IOS is reported susceptible to a remote denial of service vulnerability when handling specific DHCP packets. Reportedly, DHCP packets containing certain unspecified content have the capability to block the input queue of interfaces on affected devices. Once an input queue is blocked, further ARP, and routing protocol packets will not be processed. This condition can only be corrected by rebooting the affected device. An attacker with the ability to send malicious DHCP packets to an affected device may be able to interrupt the routing services of the affected device, potentially denying further network service to legitimate users.