Microsoft KB Archive/230681

= DUN Credentials Cached When Save Password Not Selected with RAS =

PSS ID Number: 230681

Article Last Modified on 5/14/2003

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The information in this article applies to:


 * Microsoft Windows NT Server 4.0 Terminal Server Edition
 * Microsoft Windows NT Workstation 4.0
 * Microsoft Windows NT Workstation 4.0 SP1
 * Microsoft Windows NT Workstation 4.0 SP2
 * Microsoft Windows NT Workstation 4.0 SP3
 * Microsoft Windows NT Workstation 4.0 SP4
 * Microsoft Windows NT Workstation 4.0 SP5
 * Microsoft Windows NT Server 4.0
 * Microsoft Windows NT Server 4.0 SP1
 * Microsoft Windows NT Server 4.0 SP2
 * Microsoft Windows NT Server 4.0 SP3
 * Microsoft Windows NT Server 4.0 SP4
 * Microsoft Windows NT Server 4.0 SP5
 * Microsoft Windows NT Server, Enterprise Edition 4.0
 * Microsoft Windows NT Server, Enterprise Edition 4.0 SP4
 * Microsoft Windows NT Server, Enterprise Edition 4.0 SP5

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This article was previously published under Q230681



SYMPTOMS
When you use the Dial-Up Networking client software for Microsoft RAS to connect to a server, a dialogue box requests the user's User ID and password for the server. In the same dialogue box is the Save Password check box, which is intended to provide the user with the option to cache their security credentials if desired. However, the implemented client functionality actually caches the user's credentials regardless of whether the check box is selected or not.



Windows NT Server or Workstation 4.0
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/windows/servicepacks/ -or-


 * 152734 how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

Windows NT Server 4.0, Terminal Server Edition
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.



MORE INFORMATION
For information on this problem using Microsoft Routing and Remote Access Server (RRAS) as a Dial-Up Networking client, please see the following article in the Microsoft Knowledge Base:

233303 DUN Credentials Cached When Save Password Not Selected with RRAS

Cached security credentials, including passwords, are stored and encrypted in the registry and protected by an access control list (ACL). RAS uses Local Security Authority (LSA) Secrets to store the entries. The default ACL values only allow administrators and the user associated with the credentials to gain access to these registry entries.

Additional encryption for LSA Secrets is available to provide protection for this information when stored on backup tapes, the Emergency Repair Disk, or other registry backups using the System Key option. For information on System Key (Syskey.exe) functionality, please refer to the following article in the Microsoft Knowledge Base:

143475 Windows NT System Key Permits Strong Encryption of the SAM

For additional security-related information about Microsoft products, please visit the following Microsoft Web site:

http://www.microsoft.com/security/

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