Webhits.dll is part of the Microsoft Index Server package distributed with Windows NT 4.0 and 2000.
A problem with the package could allow remote users to gain access to source code of ASP docuements.
The problem occurs in the handling of the space string by the library. When a page is requested using
the null.htw file, the request is handled by the Webhits.dll library. However, null.htw is not a real
file, and is only maintained in memory. By appending a space to the end of the requested file (%20),
the source code of the page will be returned to the requesting user, rather than the actual page. This
makes it possible for a user with malicious intentions to gain access to the system by extracting the user
ID and passwords that may be contained in .asp and .asa files.