Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2000.113 -- Microsoft Security Bulletin (MS00-038)
Patch Available for "Malformed Windows Media
Encoder Request" Vulnerability
01 June 2000
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows Media Encoder 4.0
Microsoft Windows Media Encoder 4.1
Vendor: Microsoft
Operating System: MS Windows NT 4.0
MS Windows 2000
Platform: N/A
Impact: Denial of Service
Access Required: Remote
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Microsoft Security Bulletin (MS00-038)
- - --------------------------------------
Patch Available for "Malformed Windows Media Encoder Request"
Vulnerability
May 30, 2000
Summary
=======
Microsoft has released a patch that eliminates a security
vulnerability in Microsoft(r) Windows(r) Media Encoder, which ships as
a component of the Windows Media Technologies. The vulnerability could
allow a malicious user to interfere with a digital content provider's
ability to supply real-time audio and video broadcasts.
Frequently asked questions regarding this vulnerability and the
patch can be found at
http://www.microsoft.com/technet/security/bulletin/fq00-038.asp
Issue
=====
Windows Media Encoder is a component of the Windows Media Tools, which
are part of the Windows Media Technologies. Windows Media Encoder is
used to convert digital content into Windows Media Format for
distribution by Windows Media Services in Windows NT and Windows 2000
Server. If a request with a particular malformation were sent to an
affected encoder, it could cause it to fail, thereby denying formatted
content to the Windows Media Server.
This vulnerability would primarily affect streaming media providers
that supply real-time broadcasts of streaming media - it would not
prevent a Windows Media Server from distributing already-encoded data.
The vulnerability cannot be used to cause a machine to crash, nor can
it be used to usurp any administrative privileges. Simply locating the
server could be a challenge, because the IP address of the Windows
Media Encoder would typically not be advertised.
Affected Software Versions
==========================
- Microsoft Windows Media Encoder 4.0
- Microsoft Windows Media Encoder 4.1
Patch Availability
==================
- http://www.microsoft.com/Downloads/Release.asp?ReleaseID=21596
Note: The patch installs an updated version of Windows Media Encoder
4.1. It is suitable for use on systems running either Windows Media
Encoder 4.0 or 4.1
Note: Additional security patches are available at the Microsoft
Download Center
More Information
================
Please see the following references for more information related to
this issue.
- Frequently Asked Questions: Microsoft Security Bulletin MS00-038,
http://www.microsoft.com/technet/security/bulletin/fq00-038.asp
- Microsoft Knowledge Base article Q264133 discusses this issue
and will be available soon.
- Microsoft TechNet Security web site,
http://www.microsoft.com/technet/security/default.asp
Obtaining Support on this Issue
===============================
This is a fully supported patch. Information on contacting Microsoft
Technical Support is available at
http://support.microsoft.com/support/contact/default.asp.
Acknowledgments
===============
Microsoft thanks Kit Knox for reporting this issue to us and working
with us to protect customers.
Revisions
=========
- May 30, 2000: Bulletin Created.
- - --------------------------------------------------------------
THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED
"AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES
WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS
OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION
OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR
CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY
NOT APPLY.
Last Updated May 30, 2000
(c) 2000 Microsoft Corporation. All rights reserved. Terms of use.
- -----BEGIN PGP SIGNATURE-----
Version: PGP 6.0.2
iQEVAwUBOTRgoI0ZSRQxA/UrAQFrkAf+IRpqKIEmdjs4qucyy0t1BoRReaz89nE6
d7M3dZS+0z8x12qQH392J53H9ih7BaAScjGW0Cem3zm2GDE39rR/o5czoK0z/D3F
75RNzle9DMnAUg7Gmq65ehNdKzEDCobNZY04trDdD2xc5iC5HAbn6Ts22LI9vCQh
LtqXikhWbkcI32ZE90hBKbsX+BK7RartgGB2U5t4MgBtsUwdrjAcMNhy9iboL7o7
C3XfilTlCobOuo9GGQ4Fxm+jos4YdwMhmI7daY1sANSomCF83PS/hyA44vecB4Bi
Grk2dhZA4kdD41DlWsFYg+j/lakoAwpLsuhd8Q7aMIlBZK5KeC+cUA==
=nf25
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key
iQCVAwUBOXXS4Ch9+71yA2DNAQGoBAP+IIW8PmGbwfyRlVmAEVXbJxOKIJKvmAed
qGwkN55MdS9S/OOnvPE6Xl4J6gsD4Mq73kZUngUNpJr93JVb56NlM+T49uZSTMgF
27EGvJlXMAvKWSm30/w9PsgJJxSMB3MRDk24b6V38f+xPCsrbMfKPm3fUZZMAoSi
LM0DjbZEbTM=
=ztnL
-----END PGP SIGNATURE-----