Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Internet Explorer 6 service pack that contains this hotfix.
To resolve this problem immediately, 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.
Prerequisites
There are no prerequisites required to install this hotfix.
Restart requirement
You must restart your computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
Additional information
After you install this hotfix, you can customize the filtering of the list of client certificates. To do this, follow these steps.
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
- Quit Internet Explorer.
- Click Start, click Run, type regedit, and then click OK.
- Locate and then click to select one of the following registry subkeys:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl
- After you select the subkey that is specified in step 3, on the Edit menu, point to New, and then click Key.
- Type FEATURE_CLIENTAUTHCERTFILTER, and then press ENTER.
- Right-click FEATURE_CLIENTAUTHCERTFILTER, point to New, and then click DWORD Value.
- Type Iexplore.exe, and then press ENTER.
- Right-click Iexplore.exe, and then click Modify.
- In the Value data box, type one of the values in the following table, and then click OK.
| Value data | Description |
| 1 | A certificate is considered valid for SSL client authentication if no Extended Key Usage extension is present, or is present and contains the Client Auth object identifier. In this mode, the Key Usage extension is ignored. This is the original filter used in Internet Explorer 6 (gold). |
| 2 | A certificate is considered valid for SSL client authentication if no Key Usage extension is present, or is present and not marked critical, or is present and marked critical and contains the Digital Signature bit. No Extended Key Usage extension is present, or is present and contains the Client Auth object identifier. |
| 3 | A certificate is considered valid for SSL client authentication if no Key Usage extension is present, or is present and contains the Digital Signature bit. No Extended Key Usage extension is present, or is present and contains the Client Auth object identifier. By default, this is the filter that is used after you install this hotfix. Additionally, this is the same filter that is installed by the hotfix that is described in Microsoft Knowledge Base article 811383. If the registry key is not set, the default filter (3) is used. |
811383 Internet Explorer connectivity and certificate display issues
- Quit Registry Editor.
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 tool in Control Panel.
Date Time Version Size File name
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14-Jan-2005 17:21 6.0.2800.1489 581,632 Wininet.dll