full-disclosure - Re: SSH brute force blocking tool

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Message-ID: <456B5FE3.8080904@infiltrated.net>
Date: Mon, 27 Nov 2006 17:00:03 -0500
From: "J. Oquendo" <sil@...iltrated.net>
To: Michael Holstein <michael.holstein@...ohio.edu>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: SSH brute force blocking tool

Michael Holstein wrote:
>> That specially crafted attempt would be a HUGE raping of TCP/IP. How do 
>> you supposed it would be possible for someone to insert 0wn3ed or any 
>> other variable outside of an IP address?
>>     
>
> Remember the (in)famous quote "...that vulnerability is purely 
> theoretical..."?
>
> I think the point is you don't use $language to split a bunch of fields, 
> and then pipe them back through /bin/sh without making sure they're not 
> malicious.
>
> Doesn't matter that you can't think of a way to make them malicious .. 
> somebody else will find one. It's safer to just assume it'll happen and 
> always sanitize variables before you {do_stuff;} with them.
>
> (my $0.02)
>
> ~Mike.
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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>
>   
So I ask you too... Find me any Unix derivative that will allow someone 
to pass a name, word, place, etc into the 13th column of authlog, then 
bypass grep which is grep'ing out for decimals.


-- 
====================================================
J. Oquendo
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x1383A743
sil . infiltrated @ net http://www.infiltrated.net 

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John Adams


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Full-Disclosure - We believe in it.
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Hosted and sponsored by Secunia - http://secunia.com/