Re: Microsoft signed software can be install software without pro

From: Alan Ramsbottom (ACRat_private)
Date: Mon Feb 21 2000 - 14:51:41 PST

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    > From: "Juan Carlos Garcia Cuartango" <cuartangoat_private>
    >
    > I have prepared a demo in
    > http://www.angelfire.com/ab/juan123/iengine.html
    
    Which says:
    
    "How to close the back door
    
     Disable the "Download signed ActiveX" security option".
     But this solution will also forbid other software manufacturers
     to offer you their software in the clear way, that is :
     asking before install. As usual, you can also disable
     JavaScripting as an alternative to the first solution."
    
    Disabling the specific control rather than all component download or jscript
    might be preferable for some folk.
    
    When Juan found the problem with the DHTML Edit control last year, someone
    from MS intriguingly mentioned "classid revocation" as a means to disable a
    specific control. We didn't get any useful details at the time, but some
    info finally surfaced in the MS KB article Q240797.
    
    NB: I've only tested this under W2K+IE5 and don't blame me if things break:
    
    1) Run up a registry editor and go to:
    
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX
    Compatibility\
    
    2) Create a new key based on the CLSID of the Active Setup controls:
    
    {6E449683-C509-11CF-AAFA-00AA00B6015C}
    
    3) Under your new key, create the REG_DWORD value:
    
    Compatibility Flags	 0x00000400
    
    This sets the "kill bit" for the Active Setup control i.e. stops it from
    being run via IE. This can be reversed by deleting the value or the whole of
    your new key.
    
    PS: Does anyone know the definitions for the other flag bits?
    
    -Alan-
    



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