Microsoft KB Archive/252352

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FIX: HTTP Error 403 When Submitting PATH_INFO to Mapped Application


The information in this article applies to:

  • Microsoft Windows NT Server version 4.0 SP6a
  • Microsoft Windows NT Workstation version 4.0 SP6a


When submitting extra path information to an Internet Information Server (IIS) application that has been mapped to a file extension, an error "403.2 Forbidden: Read Access Forbidden" will be returned to the browser.


This problem can be resolved by loading the hotfix available at the following location:

IIS 4.0 SSL ISAPI Filter Update


Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.


The following URL will execute the CGITest.exe application passing /Extradir/Extra.txt as PATH_INFO.


You can map a file extension to the CGITest.exe using the Internet Service Manager. If the mscgi extension is mapped to CGITest.exe, the above URL can be executed as follows:


In this case, computers running Windows NT 4 Service Pack 6a will return a 403 error.


For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

Q184320 Using PATH_INFO and PATH_TRANSLATED from CGI Applications

Additional query words:

Keywords : _IK kbiis400fix kbOSWinNT400sp6bug
Issue type : kbbug
Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400search kbWinNT400xsearch kbWinNTSsearch kbWinNTS400sp6 kbWinNTS400xsearch kbWinNTW400SP6a

Last Reviewed: October 23, 2000
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