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Re: [Full-disclosure] SSH brute force blocking tool

from [gabriel rosenkoetter] Network Security

[Permanent Link]

Subject:	Re: [Full-disclosure] SSH brute force blocking tool
Date:	Mon, 27 Nov 2006 16:34:06 -0500

On Mon, Nov 27, 2006 at 09:29:33PM +0000, Tavis Ormandy wrote:

Gabriel, I was referring to this line:

awk '!/#/ && /\./ && !a[$0]++
{print "iptables -A INPUT -s "$1" -i eth0 -d '$ifaddr' -p TCP --dport 22
-j REJECT"}' /etc/hosts.deny |\
awk '/iptables/ && !/#/ && !/-s  -i/'|sh

(note the |sh), $1 can be controlled by specially crafted attempted
logins.


Aha.

Yep, sure can!

I couldn't find where the malicious input was actually executed, but
I didn't spend long looking.

I take back my take back.

-- 
gabriel rosenkoetter
gr@eclipsed.net

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Re: [Full-disclosure] SSH brute force blocking tool, (continued) Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, Tavis Ormandy Re: [Full-disclosure] SSH brute force blocking tool, gabriel rosenkoetter Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, Tavis Ormandy Re: [Full-disclosure] SSH brute force blocking tool, gabriel rosenkoetter Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, gabriel rosenkoetter Re: [Full-disclosure] SSH brute force blocking tool, Tavis Ormandy Re: [Full-disclosure] SSH brute force blocking tool, gabriel rosenkoetter <= Re: [Full-disclosure] SSH brute force blocking tool, Michael Holstein Re: [Full-disclosure] SSH brute force blocking tool, Joshua D. Abraham Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, gabriel rosenkoetter Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, Michael Holstein Re: [Full-disclosure] SSH brute force blocking tool, J. Oquendo Re: [Full-disclosure] SSH brute force blocking tool, Tonnerre Lombard Re: [Full-disclosure] SSH brute force blocking tool, Brian Eaton Re: [Full-disclosure] SSH brute force blocking tool, Thierry Zoller

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