Cisco PIX and Adaptive Security Appliance (ASA) 5500 devices 7.2 before 7.2(4)2 8.0 before 8.0(3)14 and 8.1 before 8.1(1)4 when configured as a client VPN endpoint do not properly process IPSec client authentication which allows remote attackers to cause a denial of service (device reload) via a crafted authentication attempt aka Bug ID CSCso69942.