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Re: SSH Keys and Debian



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On 2008-05-23 19:34, Ed Curtis wrote:
> I have two deb machines I ssh to constantly on our lan. I had previously
> set up ssh-keys on these machines to rsync files to one machine. This
> morning I ran the ssh update the system update wanted me to run and
> can't ssh to this machine without using a password. I've rerun the
> keygen on the other machines and transfered them to the computer I log
> into but still get prompted for the password. Any ideas? I figure it's
> something to do with the update as it generated all new host keys, etc
> after it was installed.

Have you really deleted *all* the vulnerable keys, ie. user keys and
machine keys?


(As root run "ssh-vulnkey -a" to check for vulnerable keys. )

Delete all vulnerable keys, ie. all that were generated or could
possibly be created with the affected versions of openssh/openssl.

Create new keys.

Debian won't allow log in of users or machines with vulnerable keys.

NB: Be careful, if you have to do this via ssh to a remote box. You
might not be able to log into that box, if you commit a mistake.

HTH,

Johannes
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