Re: Possible IDS-evasion technique

From: Vadim Berezniker (vadimat_private)
Date: Fri Feb 15 2002 - 18:39:22 PST

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    Sullo sq wrote:
     > 0.9 was (is?) a valid HTTP version, so that is why Netscape/Apache
     > (and most others) are answering the request properly.  An IDS
     > _should_ not care the HTTP version for a signature matching text on
     > 'phf'.  (of course, I suspect encoding /cgi-bin/phf string would
     > also fool the IDS in this case...).
     >
     > Sullo
     >
     >
    
    Try sending HTTP/239.73, and Apache (and probably others) will still 
    respond.
    I believe they just respond to it as if it was a 1.1 request.
    I don't know what it does when you specify something like 0.1
    
    -- 
    WWW: http://www.kryptolus.com
    AIM: Kryptolus
    



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