Cisco Discovery Protocol Neighbor Announcment Denial of Service Vulnerability

Cisco Discovery Protocol (CDP) is a network neighbor discovery protocol distributed with implementations of the Cisco Internet Operating System.

CDP is implemented with some releases of the Cisco Internet Operating System. It is possible for a host on a local segment of network to cause a Cisco router to become unstable, and potentially stop routing traffic by generating large amounts of CDP traffic. This protocol can not be routed across routers to remote network segments.

This could lead to the ceasing of operation of Cisco routers, and a denial of service.


 

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