Re: Mail Server testing

From: Nicolas Gregoire (ngregoireat_private)
Date: Mon May 12 2003 - 23:35:25 PDT

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    On Mon, 2003-05-12 at 05:39, perat_private wrote:
    
    > * Zip-Of-Death. Make one huge (a couple of gigabytes) file and fill it with 
    > homogenous data, for instance only the character "a". Zip it. This will 
    > construct of a file that says "this files contains of 10(8) a:s" that is very 
    > small. Most modern mail content systems handles this today, some older might 
    > not.
    
    You should give a look to a file known as 42.zip :
    
    	http://www.securityfocus.com/bid/3027/exploit/
    
    
    "42.zip: ZIP archive, 42K, composed of nested zips (nested 6 levels
    deep, each level 17 wide) - produces a file 4GB in size and will
    reportedly crash 'most email virus checkers'"
    
    
    Regards,
    -- 
    Nicolas Gregoire ----- Consultant en Sécurité des Systèmes d'Information
    ngregoireat_private ------[ ExaProbe ]------ http://www.exaprobe.com/
    PGP KeyID:CA61B44F  FingerPrint:1CC647FF1A55664BA2D2AFDACA6A21DACA61B44F
    
    
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