Cisco Adaptive Security Appliance (ASA) Software 8.2 through 9.4.3.3 allows remote attackers to bypass intended ICMP Echo Reply ACLs via vectors related to subtypes.
http://www.securityfocus.com/bid/91693
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160711-asa