The DNS inspection engine in Cisco ASA Software 9.0 before 9.0(4.13), 9.1 before 9.1(5.7), and 9.2 before 9.2(2) allows remote attackers to cause a denial of service (device reload) via crafted DNS packets, aka Bug ID CSCuo68327.
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141008-asa