SYMPTOMS
Microsoft has released a tool that corrects the permissions on several registry values in Microsoft Windows NT 4.0. The default permissions could allow a malicious user to gain additional privileges on an affected machine.
After you create the PermittedManagers and ValidCommunities registry keys for the Simple Network Management Protocol (SNMP) service, any user has permission to read the contents of the keys. The keys should only be accessible to administrators. SNMP is not installed on Windows NT 4.0 computers by default.
For additional information about other registry keys affected by this tool, click the following article numbers to view the articles in the Microsoft Knowledge Base:
267861
MS00-095: RAS registry modification allowed without administrative rights
267864 MS00-095: MTS package administration key includes information about users
RESOLUTION
Windows NT 4.0
To 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 Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP)
The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 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.
Note Because of file dependencies, this patch requires Windows NT 4.0 Service Pack 5 or later.
The English version of this fix should have the following file attributes or later:
Date Time Size File name Platform
---------------------------------------------------
06/23/2000 08:28p 42,256 Regacl40.exe Intel
06/23/2000 08:28p 161,040 Tcpcfg.dll Intel
06/23/2000 08:27p 96,016 Regacl40.exe Alpha
06/23/2000 08:26p 242,960 Tcpcfg.dll Alpha
Windows NT Server 4.0, Terminal Server Edition
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that you determine are at risk of attack. Evaluate the computer's physical accessibility, network and Internet connectivity, and other factors to determine the degree of risk to the computer. See the associated
Microsoft Security Bulletin to help determine the degree of risk. This hotfix may receive additional testing. If the computer is sufficiently at risk, we recommend that you apply this hotfix now.
To resolve this problem immediately, download the hotfix by following the instructions later in this article or contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 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 secure servers that 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
---------------------------------------------------
07/26/2000 04:46p 42,256 regacl40.exe Intel
02/19/2001 03:39p 161,040 tcpcfg.dll Intel
