QuickBlog v0.8 CMS - Multiple Web Vulnerabilities

Document Title:
===============
QuickBlog v0.8 CMS - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=567


Release Date:
=============
2012-05-11


Vulnerability Laboratory ID (VL-ID):
====================================
567


Common Vulnerability Scoring System:
====================================
6.5


Product & Service Introduction:
===============================
QuickBlog est un gestionnaire de weblog ecrit en PHP4 compatible PHP5 et MySQL compatible MySQLi multi utilisateur multi 
langue multi theme Il est tres simple et tres lege Il utilise un editeur WYSIWYG TinyMCE avec possibilite d annexe 

(Copy of the Vendor Homepage:  http://www.comscripts.com/scripts/php.quickblog.2256.html )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered Multiple Web Vulnerabilities in QuickBlog v0.8 CMS.


Vulnerability Disclosure Timeline:
==================================
2012-05-12:	Public or Non-Public Disclosure


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Technical Details & Description:
================================
1.1
Multiple remote SQL Injection vulnerabilities are detected in the QuickBlog v0.8 Content Management System. 
The vulnerability allows an attacker (remote) or local low privileged user account to inject/execute own 
sql commands on the affected application dbms. The vulnerabilities are located on the application post 
requests of gestionpost or fct_affiche.inc & the bound vulnerable parameter page. Successful exploitation 
of the vulnerability results in dbms & application compromise.

Vulnerable File(s): 
			[+] admin/gestionpost.php
 			[+] include/fct_affiche.inc.php

Vulnerable Parameter(s):
			[+] page


1.2
Multiple persistent input validation vulnerabilities are detected in the QuickBlog v0.8 Content Management System.
The bugs allow remote attackers to implement/inject malicious script code on the application-side (persistent). 
Successful exploitation of the vulnerability can lead to session hijacking (manager/admin) or stable (persistent) 
context manipulation. Exploitation requires low user inter action & a privileged user account. 

Vulnerable File(s): 
			[+] recherche.php
			[+] commentaire/form.php
			[+] admin/samplemodifieddata.php
			[+] admin/sampleposteddata.php

Vulnerable Parameter(s):
			[+] name
			[+] title
			[+] nom & search


Proof of Concept (PoC):
=======================
1.1
The sql injection vulnerabilities can be exploited by remote attackers with privileged user account or with medium 
required user inter action. For demonstration or reproduce ...

PoC:
http://127.0.0.1:8080/quickblog/admin/gestionpost.php?page=[SQL-INJECTION]


1.2
The persistent input validation vulnerabilities can be exploited by remote attackers with low privileged user account 
& low required user inter action. For demonstration or reproduce ...

Review: recherche.php

<form action="http://127.0.0.1/quickblog/recherche.php" method="post">
<input type="hidden"  name="search" value="[PERSISTENT SCRIPT CODE!]" />
<input type="submit" value="[BUG]"/>
</form>

Review: commentaire/form.php

<form method="post" action="http://127.0.0.1:8080/quickblog/commentaire/form.php" name="form_mess"/>
<input type="hidden" name="ajout" value="true"/>
<input type="hidden" name="idpost" value="1"/>
<input type="hidden" name="nom" value="[PERSISTENT SCRIPT CODE!]"/>
<input type="hidden" name="mail" value="[email protected]"/>
<input type="hidden" name="msg" value="12345"/>
<img src="http://127.0.0.1:8080/quickblog/commentaire/captcha/captcha.php" alt="captcha"/>          
<br>To validate your comment, please enter code below.<br> 
<input type="text" name="captcha" size="20" class="com" />
<br>
<input type="submit" value="[PERSISTENT SCRIPT CODE!]" >
</form>


Solution - Fix & Patch:
=======================
In file: admin/gestionpost.php
In lines 85 - 89:

                if(isset($_GET[`page`]))
                {
                    $page = $_GET[`page`];
                    $page = $page - 1;
                }

edit:

                if(isset($_GET[`page`]))
                {
                    $page = (int)$_GET[`page`];
                }

In file: include/fct_affiche.inc.php
In lines 56 - 59:

                if(isset($_GET[`page`]))
                {
                    $page = $_GET[`page`];
                    $page = $page - 1;
                }

edit:

                if(isset($_GET[`page`]))
                {
                    $page = (int)$_GET[`page`];
                }

In file: recherche.php
In lines 52 - 55:

                if (isset($_POST[``search``]))
                {
                    $mot = $_POST[``search``];
                }

edit:

                if (isset($_POST[``search``]))
                {
                    $mot = htmlspecialchars(strip_tags($_POST[``search``]));
                }

In file: commentaire/form.php
In lines 41:

               $nom=$_POST[``nom``];

edit:

               $nom= htmlspecialchars(strip_tags($_POST[``nom``]));

In file: admin/samplemodifieddata.php
In lines 47:

               $titre = $_POST[``title``];

edit:

               $titre = htmlspecialchars(strip_tags($_POST[``title``]));

In file: admin/sampleposteddata.php
In lines 38:

              $titre = $_POST[``title``];

edit:

              $titre = htmlspecialchars(strip_tags($_POST[``title``]));


... &  2x 

   if(isset($_GET[`page`]))
                {
                    $page = (int)$_GET[`page`];
                    if($page<0) $page = 0;
                }


Security Risk:
==============
1.1
The security risk of the sql injection vulnerabilities are estimated as high(-).

1.2 
The security risk of the persistent input validation vulnerabilities are estimated as medium(+).


Credits & Authors:
==================
Vulnerability Laboratory [Research Team]  - snup ([email protected])



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