The Identity Firewall (IDFW) functionality in Cisco Adaptive Security Appliance (ASA) Software allows remote attackers to trigger authentication-state modifications via a crafted NetBIOS logout probe response, aka Bug ID CSCuj45340.
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.