The Smart Install feature in Cisco IOS 12.2, 15.0, 15.1, and 15.2 allows remote attackers to cause a denial of service (device reload) by sending a malformed Smart Install message over TCP, aka Bug ID CSCtt16051.
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.