Re: FireWall-1 FTP Server Vulnerability

From: Emiliano Kargieman (core.lists.bugtraq@CORE-SDI.COM)
Date: Fri Feb 18 2000 - 14:19:05 PST

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    Mikael Olsson wrote:
    
    >
    > The only solution that even begins to look "good" is to
    > completely reassemble the TCP stream and not make "educated"
    > guesses about what packet data belongs on what line and in
    > which order and state of the FTP protocol.
    >
    > It doesn't have to be a "proxy" in order to do this, I think.
    > You DO need to reassemble the stream completely though.
    >
    
    Of course, reassembling the TCP stream without proxing is bound to give you
    some headaches too, remember "Insertion, Evasion and D.O.S"?
    
    EK.
    --
    Emiliano Kargieman <ek@core-sdi.com>
    Director de Investigacion - CoreLabs - Core-SDI S.A.
    http://www.core-sdi.com
    
    "At any rate, let us not loiter in the arena of hot events."
                                                Tom Robbins, ARA.
    
    
    
    --- For a personal reply use emiliano_kargieman@core-sdi.com
    



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