bugtraq - Buffer-overflow in GO-Global for Windows 3.1.0.3270

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date: Wed, 2 Nov 2005 20:19:27 +0100
From: Luigi Auriemma <aluigi@...istici.org>
To: bugtraq@...urityfocus.com, bugs@...uritytracker.com,
	news@...uriteam.com, full-disclosure@...ts.grok.org.uk, vuln@...unia.com
Subject: Buffer-overflow in GO-Global for Windows
	3.1.0.3270



#######################################################################

                             Luigi Auriemma

Application:  GO-Global for Windows
              http://www.graphon.com/products/GO-GlobalforWindows.shtml
Versions:     <= 3.1.0.3270
Platforms:    Server:  Windows
              Clients: Windows, Solaris, HP-UX, IBM AIX and Linux
                       Java version not vulnerable
Bug:          buffer-overflow
Exploitation: remote, versus server and client
Date:         02 Nov 2005
Author:       Luigi Auriemma
              e-mail: aluigi@...istici.org
              web:    http://aluigi.altervista.org


#######################################################################


1) Introduction
2) Bug
3) The Code
4) Fix


#######################################################################

===============
1) Introduction
===============


GO-Global for Windows is a server-based thin-client solution.
It allows users to run 32-bit Windows applications remotely from a
server, the application runs entirely on the server but is displayed on
the client.


#######################################################################

======
2) Bug
======


After the initial handshake where is specified the type of encryption
to use (_USERSA_), the application uses 16 bit fields for specifying
the length of the subsequent data blocks.
Both the client and the server use a small buffer which leads to a
buffer-overflow if an attacker uses a data block longer than its size.
Both server and clients are vulnerables.


#######################################################################

===========
3) The Code
===========


For testing the "GO-Global for Windows" server:
  http://aluigi.altervista.org/poc/ggwbof.zip

For testing the "GO-Global for Windows" clients:
  http://aluigi.altervista.org/poc/ggwbofc.zip


#######################################################################

======
4) Fix
======


Version 3.1.0.3281


#######################################################################


--- 
Luigi Auriemma 
http://aluigi.altervista.org 
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/