bugtraq - Re: [FD] SSH host key fingerprint

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Date: Mon, 01 Sep 2014 23:32:13 +0200
From: john <mail@...nbond.org>
To: Stephanie Daugherty <sdaugherty@...il.com>,
  John Leo <johnleo@...ckssh.com>
CC: fulldisclosure@...lists.org, bugtraq@...urityfocus.com
Subject: Re: [FD] SSH host key fingerprint - through HTTPS

On 01/09/14 10:43, Stephanie Daugherty wrote:
> Sure it shows me the fingerprint, but it doesn't tell me for sure if that's
> the RIGHT fingerprint or the fingerprint of an imposter,
> 
> It's entirely possible that both myself and that site are BOTH falling
> victim to a MITM attack.(routing attacks, DNS attacks, etc)
> 
> Proper host key verification (which nobody does) ideally means one or more
> of:
> * Verification that the SSH host key is connected via certificate chain to
> a trusted certificate,
> * Comparison to a fingerprint being posted on the organization's OWN https
> site
> * Comparison to a fingerprint provided with a GPG or S/MIME signature from
> the administrator of the machine.
> * Voice verification of the host public key or its fingerprint with the
> administrator of the machine.
> * Obtaining a printed copy of the host public key or its fingerprint
> directly from the administrator.
Or just use an SSHFP record in a signed zone