FAS and public Key auth

Till Maas opensource at till.name
Thu May 22 14:01:52 UTC 2008

On Thu May 22 2008, Mike McGrath wrote:

> Now, I've never actually done this.  It's just my understanding that it'd
> work that way.  If you had root on a box and I sshed there with my ssh
> key, would you not have access to take the key and log in to other boxes
> as me?
> So my question is, is this a real risk or is there a precaution in SSH
> preventing the attack i'm describing (basically a man in the middle type
> attack)

Afaik this attack is not possible with ssh because a user signs some 
information that is unique to the current session and contains among other 
things a hash of the host key that the user wants to login to.

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