Cisco IOS 12.2 through 12.4 and 15.0 through 15.6 and IOS XE 3.1 through 3.17 and 16.2 allow remote attackers to cause a denial of service (device reload) via crafted fields in an H.323 message, aka Bug ID CSCux04257.
http://www.securitytracker.com/id/1036914
http://www.securityfocus.com/bid/93209
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-h323