Date: Tue, 4 May 1999 13:12:09 -0300
From: Wanderley J. Abreu Junior <storm@UNIKEY.COM.BR>
To: BUGTRAQ@netspace.org
Subject: Microsoft Netmeeting Hole

                    Since I hadn't any response from Microsoft and a formal
response from CERT i'm putting it here hopping for a helping hand on this
problem.


Version 1.0
October 1996
   CERT(sm) Coordination Center
  Product Vulnerability Reporting Form

    If you know of a vulnerability in a product, please complete
    this form and return it to cert@cert.org.  We aren't able to
    acknowledge each report we receive; however, if we have additional
    questions, we will contact you for further information.

     We prefer that any vulnerability information you
          send to us be encrypted. We can support a shared DES
   key or PGP. Contact the CERT staff for more information.
   The CERT PGP public key is available in

              ftp://info.cert.org/pub/CERT_PGP.key

    Thanks, we appreciate your taking the time to report this
    vulnerability.

Please describe the vulnerability.
- ---------------------------------

What is the impact of this vulnerability?
- ----------------------------------------
 (For example: local user can gain root/privileged access, intruders
  can create root-owned files, denial of service attack,  etc.)

   a) What is the specific impact: Users running MS NetMeeting Version 2.1
(The one that comes
      with windows 98) software in a conference can copy/paste the remote
clipboard area.

   b) How would you envision it being used in an attack scenario:
       With the chat windows OPENED just do a CTRL-C in the box where you
       write with nothing in your box and nothing selected at all. then, you
can get
       the entire clipboard from the other user in the conference, of
course,
       if there's something in his Clipboard (ASCII, Bin, etc).


To your knowledge is the vulnerability currently being exploited?
- ----------------------------------------------------------------
 [no]

If there is an exploitation script available, please include it here.
- --------------------------------------------------------------------

Do you know what systems and/or configurations are vulnerable?
- -------------------------------------------------------------
 [yes]  (If yes, please list them below)

 System  : Windows 95, 98 and NT
 OS version : All Versions
 Verified/Guessed: Guessed

Are you aware of any workarounds and/or fixes for this vulnerability?
- --------------------------------------------------------------------
 [yes] (If you have a workaround or are aware of patches
       please include the information here.)

I'm using PGP to encrypt the clipboard area.

OTHER INFORMATION
===========================================================================
Is there anything else you would like to tell us? Please, send me some
feedback abou this bug
i'm working on a solution but seems NetMeeting to use some sort of Common
Clipboard to build all
the share enviroments. If you ever heard abou this bug, please also let me
know. Thank you.


Best Regards,
                Wanderley Junior