Race condition in Cisco Adaptive Security Appliance (ASA) and PIX 7.1 before 7.1(2)49 and 7.2 before 7.2(2)19, when using "clientless SSL VPNs," allows remote attackers to cause a denial of service (device reload) via "non-standard SSL sessions."
https://exchange.xforce.ibmcloud.com/vulnerabilities/34023
http://www.vupen.com/english/advisories/2007/1636
http://www.securityfocus.com/bid/23768
http://www.kb.cert.org/vuls/id/337508
http://www.cisco.com/en/US/products/products_security_advisory09186a0080833166.shtml