The (1) fwdrv.sys and (2) khips.sys drivers in Sunbelt Kerio Personal Firewall 4.3.268 and earlier do not validate arguments passed through to SSDT functions, including NtCreateFile, NtDeleteFile, NtLoadDriver, NtMapViewOfSection, NtOpenFile, and NtSetInformationFile, which allows local users to cause a denial of service (crash) and possibly other impacts via unspecified vectors.
secunia.com/advisories/22234
securityreason.com/securityalert/1685
securitytracker.com/id?1016967
www.matousec.com/info/advisories/Kerio-Multiple-insufficient-argument-validation-of-hooked-SSDT-functions.php
www.securityfocus.com/archive/1/447504/100/0/threaded
www.securityfocus.com/bid/20299
www.vupen.com/english/advisories/2006/3872
exchange.xforce.ibmcloud.com/vulnerabilities/29313