CentOS Web Panel v0.9.8.12 - Persistent Vulnerabilities

Type vulnerlab
Reporter Benjamin K.M. [bkm@vulnerability-lab.com] - https://www.vulnerability-lab.com/show.php?user=Benjamin+K.M.
Modified 2018-01-19T00:00:00


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

References (Source):



Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

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:

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

Exploitation Technique:

Severity Level:

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

"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:
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Cookie[cwpsrv-3cc0cea69668d490e1029c2a41ce5df3=8fnvi0bqgjj162mqklruu8clq5; PHPSESSID=8dsrha0ivd80kkgukvklgvmct1]
      id[%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]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Keep-Alive[timeout=5, max=94]

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=>"<%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 -->


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:2030/index.php?module=mail_add-new 
Mime Type[text/html]
   Request Header:
      User-Agent[Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Cookie[cwpsrv-3cc0cea69668d490e1029c2a41ce5df3=8fnvi0bqgjj162mqklruu8clq5; PHPSESSID=8dsrha0ivd80kkgukvklgvmct1]
      email_address[%3E%22%3CPAYLOAD INJECTION POINT!+src]
      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]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Keep-Alive[timeout=5, max=100]

PoC: POST via add Mailbox in email input 
<div class="row">
<br>Email domain <b>test-domain.com</b> created.
<br>Mailbox <b>a>"<%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.
<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>
        <a href='#' class='minimize'>Minimize</a>
        <div class='panel-body' style='padding-bottom:0;'>
<form action='' method= 'post'>
<input type='hidden' name='ifpost' size='0' value='yes'>


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.

Disclaimer & Information:
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or 
implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any 
case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability Labs or its 
suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability mainly for incidental
or consequential damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface 
websites, hack into databases or trade with stolen data. We have no need for criminal activities or membership requests. We do not publish advisories 
or vulnerabilities of religious-, militant- and racist- hacker/analyst/researcher groups or individuals. We do not publish trade researcher mails, 
phone numbers, conversations or anything else to journalists, investigative authorities or private individuals. 

Domains:    www.vulnerability-lab.com		- www.vulnerability-db.com					- www.evolution-sec.com
Programs:   vulnerability-lab.com/submit.php 	- vulnerability-lab.com/list-of-bug-bounty-programs.php 	- vulnerability-lab.com/register.php
Feeds:	    vulnerability-lab.com/rss/rss.php 	- vulnerability-lab.com/rss/rss_upcoming.php 			- vulnerability-lab.com/rss/rss_news.php
Social:	    twitter.com/vuln_lab		- facebook.com/VulnerabilityLab 				- youtube.com/user/vulnerability0lab

Any modified copy or reproduction, including partially usages, of this file, resources or information requires authorization from Vulnerability Laboratory. 
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by 
Vulnerability Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website is trademark 
of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or edit our material contact (admin@) to get an ask permission.

				    Copyright © 2018 | Vulnerability Laboratory - [Evolution Security GmbH]™