Microsoft KB Archive/898061

= Authentication fails from a Windows XP-based client if the authentication uses a Windows Server 2003-based IAS server =

Article ID: 898061

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
 * Microsoft Windows XP Professional

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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
Authentication fails from a Microsoft Windows XP-based client if the following conditions are true:
 * The authentication uses Microsoft Internet Authentication Service (IAS) on a Microsoft Windows Server 2003-based computer.
 * The authentication uses Extensible Authentication Protocol-Transport Layer Security (EAP-TLS).
 * The client uses a certificate that does not contain an Extended Key Usage (EKU).



CAUSE
This problem occurs because the current EAP-TLS implementation requires the presence of both the server authentication EKU and the client authentication EKU in the certificate that the client uses.



RESOLUTION
This hotfix has versions for both Windows XP and Windows Server 2003. To resolve the problem, follow these steps:
 * 1) Apply the Windows XP version of this hotfix on the client.
 * 2) Apply the Windows Server 2003 version of this hotfix on the IAS server.
 * 3) Create and enable the TlsServerUseAllPurposeCert registry entry on the IAS server after you apply the hotfixes.

Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
To apply this hotfix, you must have Windows XP Service Pack 2 installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows XP, x86-based versions

Windows XP, x64-based versions

Windows Server 2003
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Create and enable the TlsServerUseAllPurposeCert registry entry after you apply this hotfix. To do this, follow these steps:  Click Start, click Run, type regedit, and then click OK. Locate the following registry subkey:

 Right-click this registry subkey, point to New, and then click DWORD Value. Type TlsServerUseAllPurposeCert as the registry entry name, and then press ENTER. Double-click the TlsServerUseAllPurposeCert registry entry. In the Edit DWORD Value dialog box, click Decimal under Base.</li> In the Value data text box, type 0 or 1, as appropriate for your situation.

Note When this value is set to 1, the IAS server only sends to the client a certificate that does not contain an EKU. When this value is set to 0, the IAS server only sends to the client a certificate that contains an EKU.</li></ol>

Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Prerequisites
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 (SP1) installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2003, x86-based versions

Windows Server 2003, Itanium-based versions

Windows Server 2003, x64-based versions

<div class="status_section">

STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows Server 2003 Service Pack 2.

<div class="moreinformation_section">

MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbbug kbfix kbqfe kbpubtypekc kbwinxppresp3fix kbexpertiseinter kbexpertisebeginner kbhotfixserver kbwinserv2003presp2fix kbwinserv2003sp2fix KB898061

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