Outpost Firewall Pro 4.0.1025.7828 does not properly validate certain parameters to System Service Descriptor Table (SSDT) function handlers which allows local users to cause a denial of service (crash) and possibly gain privileges via the (1) NtCreateKey (2) NtDeleteFile (3) NtLoadDriver (4) NtOpenProcess (5) NtOpenSection (6) NtOpenThread and (7) NtUnloadDriver kernel SSDT hooks a partial regression of CVE-2006-7160.