| The CIKT driver users
the legacy WinRT user mode driver framework to communicate with
(P)KTX cards. Security enhancements and driver model changes have
made this underlying technology of the CIKT driver
unsupported. It uses the Win32 API function
DeviceIoControl to communicate with the kernel mode component
of the WinRT framework. It does this using IOCTL structures, one of
the core structures used in Windows drivers. The CTL_CODE
that WinRT uses in these requests are FILE_ANY_ACCESS.
Security changes incorporated into updates to Windows Server 2003,
and part of Windows Server 2003 R2 have forced drivers which use
these to check access rights first using
IoValidateDeviceIoControlAccess. Since WinRT does
not check this these calls fail.
Other significant changes to driver models
and permissions means that CIKT and WinRT are similarly not
supported on Windows Vista and Server 2008. The interested reader
can learn more by checking the link below "Windows Security Model:
What Every Driver Writer Needs to Know"
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