Cisco Adaptive Security Appliance (ASA) and Cisco PIX security appliance 7.2.x before 7.2(3)2 and 8.0.x before 8.0(2)17 allows remote attackers to cause a denial of service (device reload) via a port scan against TCP port 443 on the device.
http://www.vupen.com/english/advisories/2008/1750/references
http://www.cisco.com/en/US/products/products_security_advisory09186a00809a8354.shtml
http://securitytracker.com/id?1020183