Fixes Required in TCSEC C2 Security Evaluation Configuration for Windows NT 4.0 Service Pack 6a

The "Administrator's and User's Security Guide for Windows NT 4.0" is the official document that specifies the exact procedures to configure Windows NT 4.0 as a Trusted Computer System Evaluation Criteria (TCSEC) C2 compliant system. This guide is available from the following Microsoft Web site: These procedures include the installation of Windows NT 4.0 Service Pack 6a and a Post-SP6a hotfix called the "C2 Update."

The C2 Update corrects the following problems in Windows NT 4.0:

• NetBT disallows unprivileged user mode programs from sharing TCP and UDP ports that are opened by NetBT. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
  241041  (http://support.microsoft.com/kb/241041/EN-US/ ) Enabling NetBT to Open TCP and UDP Ports Exclusively
• Device drivers create their corresponding DeviceObject with FILE_DEVICE_SECURE_OPEN DeviceCharacteristics. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
  243405  (http://support.microsoft.com/kb/243405/EN-US/ ) Device Drivers Create Their Corresponding DeviceObject with FILE_DEVICE_SECURE_OPEN DeviceCharacteristics
• Jet500 creates events and semaphores objects with non-NULL ACLs. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
  243404  (http://support.microsoft.com/kb/243404/EN-US/ ) ACLs Associated with Events and Semaphores Created by JET500.DLL

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