This article was previously published under Q294774
This article has been archived. It is offered "as is" and will no longer be updated.
If an ISAPI DLL has the same name as a DLL that is listed in the InProcessIsapiApps metabase entry, Internet Information Services (IIS) loads the ISAPI extension in-process even when the Application is marked for High Isolation.
When IIS reads the list of InProcessIsapiApps from the metabase, it makes two copies of each entry: one copy of the entire path and one copy of only the DLL. This allows for relative path matching.
To resolve this problem, either obtain the hotfix referenced in this section or Windows 2000 Security Rollup Package 1 (SRP1). For additional information about SRP1, click the article number below to view the article in the Microsoft Knowledge Base:
311401 Windows 2000 Security Rollup Package 1 (SRP1), January 2002
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The following file is available for download from the Microsoft Download Center:
NOTE: This patch can be installed on systems running Windows 2000 Service Pack 1 or Windows 2000 Service Pack 2. You must reapply the security rollup patch after you install a Windows 2000 Service Pack.
Release Date: August 15, 2001
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.The English version of this fix should have the following file attributes or later:
Date Time Version Size File name ---------------------------------------------------- 31-May-2001 15:32 5.0.2195.3649 353,040 W3svc.dll
Microsoft has confirmed that this problem may cause a degree of security vulnerability in Internet Information Services 5.0. This problem was first corrected in Windows 2000 Service Pack 3.
This patch also contains fixes for the problems described in the following Microsoft Knowledge Base article:
297860 IIS 5.0 Security and Post-Windows NT 4.0 SP5 IIS 4.0 Patch Rollup
For more information on this vulnerability, see the following Microsoft Web site: