MS00-091: Multiple NetBT Sessions May Hang Local Host
This article was previously published under Q275567 On This PageSYMPTOMS After a remote computer creates multiple TCP/IP connections
with a local host and establishes a NetBIOS over TCP/IP (NetBT) session by
using port 139, when the remote computer does not properly initiate a session
closure for each open connection, the local host may stop responding
(hang). Note that this issue does not affect computers that are running Microsoft Windows 2000. RESOLUTIONWindows NT 4.0; BackOffice Server 4.0 and 4.5; and BackOffice Small Business Server 4.0, 4.0a, and 4.5To resolve this problem, obtain the individual package referenced below or obtain the Windows NT 4.0 Security Rollup Package. For additional information on the SRP, click the article number below to view the article in the Microsoft Knowledge Base:299444 (http://support.microsoft.com/kb/299444/EN-US/) Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)
The following file is available for download from the Microsoft
Download Center:
Intel-based computers: For
additional information about how to download Microsoft Support files, click the
following article number to view the article in the Microsoft Knowledge Base:  Download Q275567i.exe now (http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=176A1B04-06A6-452C-985D-04E32679E71C)119591 (http://support.microsoft.com/kb/119591/EN-US/) How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most
current virus-detection software that was available on the date that the file
was posted. The file is stored on security-enhanced servers that help to
prevent any unauthorized changes to the file.
The English version of this fix should have the
following file attributes or later: Date Time Size File name Platform ----------------------------------------------------------- 09/29/2000 09:05p 124,688 Netbt.sys Intel 09/29/2000 09:04p 224,912 Netbt.sys Alpha Microsoft Windows NT Server version 4.0, Terminal Server EditionTo resolve this problem, obtain the Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package (SRP). For additional information about the SRP, click the article number below to view the article in the Microsoft Knowledge Base:317636 (http://support.microsoft.com/kb/317636/EN-US/) Windows NT Server 4.0, TerminalServer Edition, Security Rollup Package
STATUSMicrosoft has confirmed that
this problem may cause a degree of security vulnerability in Microsoft Windows
NT 4.0 and Windows NT Server version 4.0, Terminal Server
Edition. MORE INFORMATION Disabling a computer's Server service (Windows NT) or File
and Print Sharing (Windows 95 or Windows 98) can prevent the computer from
being susceptible to this vulnerability. For related information about this problem, please visit the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/MS00-091.mspx (http://www.microsoft.com/technet/security/bulletin/MS00-091.mspx) For additional security-related information about Microsoft
products, please visit the following Microsoft Web site: http://www.microsoft.com/security/ (http://www.microsoft.com/security/) APPLIES TO
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