The Autonomic Networking Infrastructure (ANI) implementation in Cisco IOS 15.4S and 15.4(3)S allows remote attackers to modify configuration settings or cause a denial of service (partial service outage) by sending crafted Autonomic Networking (AN) messages on an intranet network, aka Bug ID CSCup62167.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.