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ms99-046

ms99-046
Posted Dec 24, 1999

Re-release of Microsoft Security Bulletin MS99-046 - In November, we withdrew a previously released patch that improved the randomness of TCP initial sequence numbers in Windows NT 4.0. The patch was withdrawn because it contained the same regression error that was present in Windows NT 4.0 SP6. We have eliminated the regression error and re-released the patch. Microsoft FAQ on this issue available here.

tags | tcp
systems | windows
SHA-256 | 3348e8337e221d3e310f486dded733222eff60573e693021804173357d5202dc

ms99-046

Change Mirror Download
Re-release of Microsoft Security Bulletin MS99-046
--------------------------------------------------

In November, we withdrew a previously released patch that improved the
randomness of TCP initial sequence numbers in Windows NT 4.0. The patch was
withdrawn because it contained the same regression error that was present in
Windows NT 4.0 SP6. We have eliminated the regression error and re-released
the patch. The security bulletin has been updated and is available at
http://www.microsoft.com/Security/Bulletins/ms99-046.asp; the FAQ also has
been updated and is available at
http://www.microsoft.com/Security/Bulletins/ms99-046faq.asp.

All versions of the original patch were affected by the regression error,
although the error only manifested itself in certain situations. When
applying the new patch, it's not necessary to uninstall the original patch
first. Just install the patch as normal. Here's how to determine which
patch to apply:
- If you are running Windows NT 4.0 SP4 or SP5 on an Intel machine, go
to http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16763 and
select q243835sp5i.exe.
- If you are running Windows NT 4.0 SP6 on an Intel machine, go to
http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16764 and
select q243835i.exe.
- If you are running Windows NT 4.0 SP4 or SP5 on an Alpha machine, go
to http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16763 and
select q243835sp5a.exe.
- If you are running Windows NT 4.0 SP6 on an Alpha machine, go
to http://www.microsoft.com/Downloads/Release.asp?ReleaseID=16764 and
select q243835a.exe.

We are very sorry for any inconvenience caused by the regression error, and
will do our best to prevent similar problems in the future. Regards,

The Microsoft Security Response Team

*******************************************************************
You have received this e-mail bulletin as a result of your registration
to the Microsoft Product Security Notification Service. You may
unsubscribe from this e-mail notification service at any time by sending
an e-mail to MICROSOFT_SECURITY-SIGNOFF-REQUEST@ANNOUNCE.MICROSOFT.COM
The subject line and message body are not used in processing the request,
and can be anything you like.

For more information on the Microsoft Security Notification Service
please visit http://www.microsoft.com/security/services/bulletin.asp. For
security-related information about Microsoft products, please visit the
Microsoft Security Advisor web site at http://www.microsoft.com/security.

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