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Security Update, November 3, 2000

This update resolves the "NetMon Protocol Parsing" security vulnerability in Windows NT® 4.0 Server and Windows NT 4.0 Server, Enterprise Edition. Network Monitor (NetMon) is an administrative tool that is used to monitor network traffic. If malformed data is sent over a network that an administrator is monitoring, it could overrun the buffer (a temporary data storage area on your computer) and either cause the NetMon to fail, or cause code of the senders choice to run on the computer that is under the administrator's control. Download now to help prevent a malicious user from causing your computer's buffer to overflow.

Note Microsoft has released four updates that address the "NetMon Protocol Parsing" security vulnerability in SMS 1.2 and 2.0, Windows NT 4.0 Server and Windows NT 4.0 Server, Enterprise Edition, Windows 2000 Server and Windows 2000 Advanced Server. Apply the SMS 1.2 or 2.0 update to computers that are running SMS 1.2 or 2.0, regardless of the operating system on which it is running. Customers who are not running SMS but who are using an affected server should apply the operating system update. Netmon ships as a part of Windows NT 4.0 Server, Windows NT 4.0 Server, Enterprise Edition, Windows 2000 Server, and Windows 2000 Advanced Server. Windows NT 4.0 Workstation and Windows 2000 Professional are vulnerable only if SMS is installed.

For more information about this vulnerability, please read Microsoft Security Bulletin MS00-083. (This site is in English.)

System Requirements
This update applies to:

- Windows NT 4.0 Server Service Pack 6a
- Windows NT 4.0 Server, Enterprise Edition Service Pack 6a

Note This update will be included in Windows NT 4.0 Service Pack 7.

How to use
Restart your computer to complete the installation.

How to uninstall

1. Click Start, point to Settings, and then click Control Panel.
2. Double-click Add/Remove Programs.
3. Select Windows NT 4.0 Hotfix [See Q274835 for more information] and click Add/Remove to uninstall.

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