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bug#18967: Tramp disables important SSH security features
From: |
Ted Zlatanov |
Subject: |
bug#18967: Tramp disables important SSH security features |
Date: |
Thu, 06 Nov 2014 07:05:40 -0500 |
User-agent: |
Gnus/5.130012 (Ma Gnus v0.12) Emacs/25.0.50 (gnu/linux) |
On Thu, 06 Nov 2014 00:47:40 +0000 Daniel Colascione <dancol@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