Cisco Adaptive Security Appliances (ASA) 5500 series devices with software 8.2(4) and earlier allow remote attackers to cause a denial of service via a flood of packets, aka Bug ID CSCtg06316.
https://exchange.xforce.ibmcloud.com/vulnerabilities/64599
http://www.securitytracker.com/id?1024963
http://www.securityfocus.com/bid/45766
http://www.cisco.com/en/US/docs/security/asa/asa82/release/notes/asarn82.pdf