Full Disclosure mailing list archives
Re: SSH host key fingerprint - through HTTPS
From: Jeroen van der Ham <jeroen () 1sand0s nl>
Date: Mon, 1 Sep 2014 22:43:25 +0200
Hi, On 1 Sep 2014, at 10:43, Stephanie Daugherty <sdaugherty () gmail com> 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.
There is a way now, using the “magic” of DNSSEC and SSHFP records: http://tools.ietf.org/html/rfc4255 You use the DNSSEC hierarchy to create a trust chain. You can then securely publish a signed fingerprint of your SSH host key for that specific machine. Jeroen. _______________________________________________ Sent through the Full Disclosure mailing list http://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
Current thread:
- SSH host key fingerprint - through HTTPS John Leo (Sep 01)
- Re: SSH host key fingerprint - through HTTPS Stephanie Daugherty (Sep 01)
- Re: SSH host key fingerprint - through HTTPS Jeroen van der Ham (Sep 01)
- Re: SSH host key fingerprint - through HTTPS Jeroen van der Ham (Sep 01)
- Re: SSH host key fingerprint - through HTTPS John Leo (Sep 02)
- Re: SSH host key fingerprint - through HTTPS maxigas (Sep 01)
- Re: SSH host key fingerprint - through HTTPS John Leo (Sep 02)
- Re: SSH host key fingerprint - through HTTPS Busindre ™ (Sep 09)
- Re: SSH host key fingerprint - through HTTPS Árpád Magosányi (Sep 03)
- Re: SSH host key fingerprint - through HTTPS John Leo (Sep 02)
- Re: SSH host key fingerprint - through HTTPS Stephanie Daugherty (Sep 01)