Cisco Adaptive Security Appliances (ASA) 5500 series devices with software before 8.3(2) do not properly preserve ACL behavior after a migration, which allows remote attackers to bypass intended access restrictions via an unspecified type of network traffic that had previously been denied, aka Bug ID CSCte46460.
https://exchange.xforce.ibmcloud.com/vulnerabilities/64575
http://www.securitytracker.com/id?1024963
http://www.securityfocus.com/bid/45768
http://www.cisco.com/en/US/docs/security/asa/asa83/release/notes/asarn83.pdf