The following is a Security Bulletin from the Microsoft Product Security Notification Service. Please do not reply to this message, as it was sent from an unattended mailbox. ******************************** On October 22, 1999, Microsoft released Security Bulletin MS99-046, discussing the availability of a patch that improves the randomness of TCP Initial Sequence Numbers. However, we recently learned that the patch contains a regression error, and as a result, we have removed it from our download site. We are working to correct the error, and will deliver an updated version of the patch shortly. In the meantime, we wanted to provide some information on the problem and what customers should do. The patch is affected by the same error that recently was announced in Windows NT 4.0 Service Pack 6. (Please see http://www.microsoft.com/ntserver/nts/downloads/recommended/SP6/allSP6.asp for more information on Service Pack 6). The effect of the error is to prevent some applications from connecting to the server via WINSOCK unless run in an administrative context. The error is not associated with TCP Initial Sequence Numbers, nor does it pose any security risk. If you are not experiencing problems with the patch, you can safely leave it in place until the updated patch is available. If you are experiencing problems, please see http://www.microsoft.com/security/bulletins/MS99-046faq.asp for information on how to remove the patch or apply a temporary workaround. A new version of the patch is nearly complete, and we expect to release it soon. When it is available, we will update the bulletin and announce the availability of the patch via the Microsoft Product Security Notification Service. We are very sorry for any inconvenience caused by the error. Sincerely, The Microsoft Product Security 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-REQUESTat_private 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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