Home    |    View Topics    |    Search    |    Contact Us    |   



Category:   Application (Generic)  >   PHP Live! Vendors:   OSI Codes Inc.
PHP Live! Include File Bug in 'help.php' Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1017017
SecurityTracker URL:
CVE Reference:   CVE-2006-3911   (Links to External Site)
Updated:  Jun 2 2008
Original Entry Date:  Oct 9 2006
Impact:   Execution of arbitrary code via network, User access via network
Exploit Included:  Yes  
Version(s): 3.1 and prior versions
Description:   A vulnerability was reported in PHP Live!. A remote user can include and execute arbitrary code on the target system.

The 'help.php' script does not properly validate user-supplied input in the 'css_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.

A demonstration exploit URL is provided:


Paisterist of [N]eo [S]ecurity [T]eam [NST] discovered this vulnerability.

The original advisory is available at:

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.
Solution:   No solution was available at the time of this entry.

[Editor's note: The latest version is 3.2.2. The report did not indicate whether the latest version is affected or not.]

Vendor URL: (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  PHP Live! <= 3.1 help.php Remote File Inclusion vulnerability

[N]eo [S]ecurity [T]eam [NST] - Advisory #25 - 08/10/06
Program: PHP Live!
Vulnerable Versions: 3.1 and prior
Risk: High!
Impact: Critical Risk

-==PHP Live! <= 3.1 help.php Remote File Inclusion vulnerability==-

- Description
PHP Live! enables live help and live customer support communication directly from your website. With PHP 
Live!, you can provide one-on-one chat assistance in real-time, answer visitor questions and add that extra human touch to 
your website.

- Tested
localhost & many sites

- Explotation

Vulnerable code:

==[ help.php 30 ]=============================
<?php $css_path = ( !isset( $css_path ) ) ? $css_path = "./" : $css_path ; include_once( $css_path."css/default.php" ) ; ?>
==[ end help.php ]============================

How we can see there's an arbitrary file inclusion, so we can just include a file from another server, executing the php code 
in the victim's server.

Proof of Concept:

We use a NULL byte at the final of the string because include_once() take a null byte like the end of a string. In this way, 
"css/default.php" doesn't appears at the end of the var.

If you don't wanna use a NULL byte you can do something like:

In this way $foo has css/default.php in the attacker script.

Note: this vulnerability is present only if register_globals is turned on.

There are a lot of Local and Remote File Inclusion vulnerabilities in this script... but there is no reason to publish it.

- How to fix it? More information?
Visit our forum to know how to fix it or to get more information.

- References

- Credits
Discovered by Paisterist -> paisterist.nst [at] gmail [dot] com

[N]eo [S]ecurity [T]eam [NST] -

- Greets

Argentina, Colombia, Chile, Bolivia, Uruguay EXISTS!!

'@@'@@@@@@''@@@@@@ @@@'''''@@@

/* EOF */


Go to the Top of This SecurityTracker Archive Page

Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2019, LLC