The good , the bad, the IIS. (%3F Weirdness)

From: jesperhtat_private
Date: Sat Jan 05 2002 - 09:14:34 PST

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     ('binary' encoding is not supported, stored as-is)
    *I have no clue if this is a new bug or not due to my 
    lack of hotfixes, but here it goes!*
    
    Hello fellow vuln-dev'ers,
    Here is a srange bug ive found on my test server:
    
    Microsoft Windows 2000 [Version 5.00.2195]  
    (service pack 2)
    
    Making the following request:
    
    http://bender/global.asa%3f.htr
    
    Adding a %3f.htr at the end seems to yield its source 
    code.  Because this is a default install, all that it 
    contains is the following:
    
    <OBJECT RUNAT=Server SCOPE=Session 
    ID=MyInfo PROGID="MSWC.MyInfo">
    </OBJECT>
       
    Ive tried appending  %3f.htr to iisstart.asp (another 
    default file), but that does not reveal a thing.  
    Renaming iisstart.asp to iisstart.asa and trying to 
    view its source does not work then either.  I cant find 
    any logic behind this. Please give this a shot, play 
    with this, and send in your results/thoughts!
    
    Best Regards,
    -Scarabus
    



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