updates Internet Information Server to prevent a vulnerability in server-side processing.
If a file on IIS resides in a virtual directory whose name contains a legal file extension, the normal server-side processing of the file can be bypassed. The vulnerability would manifest itself in different ways depending on the specific file type requested, the specific file extension in the virtual directory name, and the permissions that the requester has in the directory. In most cases, an error would result and the requested file would not be served. In the worse case, the source code of ASP or other files could be sent to the browser.
This vulnerability would be most likely to occur due to administrator error, or if a product generated an affected virtual directory name by default. (Front Page Server Extensions is one such product). Recommended security practices militate against including sensitive information in ASP and other files that require server-side processing, and if this recommendation is observed, there would be no sensitive information divulged even if this vulnerability occurred. In any event, an affected virtual directory could be identified during routine testing of the server.
Microsoft IIS and quot;Virtual Directory Naming and quot; Vulnerability Patch runs on
Windows NT/2000/Windows 10/11
and is available under the
Freeware
license
— the installer is 400 KB.
We’ve catalogued it under
Servers.
✓
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