vsdatant.sys 6.5.737.0 in Check Point Zone Labs ZoneAlarm before 7.0.362 allows local users to gain privileges via a crafted Interrupt Request Packet (Irp) in a METHOD_NEITHER (1) IOCTL 0x8400000F or (2) IOCTL 0x84000013 request, which can be used to overwrite arbitrary memory locations.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36107
http://www.vupen.com/english/advisories/2007/2929
http://www.securityfocus.com/bid/25377
http://www.securityfocus.com/bid/25365
http://www.securityfocus.com/archive/1/477155/100/0/threaded
http://www.reversemode.com/index.php?option=com_remository&Itemid=2&func=fileinfo&id=53
http://securitytracker.com/id?1018589
http://secunia.com/advisories/26513
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=585