GNU bug report logs - #18967
Tramp disables important SSH security features

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From: Ted Zlatanov <tzz <at> lifelogs.com>
To: Daniel Colascione <dancol <at> dancol.org>
Cc: 18967 <at> debbugs.gnu.org
Subject: bug#18967: Tramp disables important SSH security features
Date: Thu, 06 Nov 2014 07:05:40 -0500

On Thu, 06 Nov 2014 00:47:40 +0000 Daniel Colascione <dancol <at> dancol.org> wrote: 

DC> Tramp disables SSH host key checks by setting
DC> GlobalKnownHostsFile=/dev/null, UserKnownHostsFile=/dev/null, and
DC> StrictHostKeyChecking=no in its default method configuration. These
DC> settings allow attackers to intercept connections to remote hosts, sniff
DC> passwords, and cause other mischief. I don't think we should ship an
DC> insecure configuration.

I think the alternatives are something like what Ansible does:
http://www.ansible.com/blog/2014/01/15/ssh-connection-upgrades-coming-in-ansible-1-5
or a SSH client library as a FFI. SSH, when called externally, has many
failure modes without those options.

Ted

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