Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com Date: Wed, 4 Apr 2001 16:58:41 -0400 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: ssh Authentication--RSA/Password Message-ID: <20010404165841.A4546@redhat.com> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.11i In-Reply-To: ; from karlm30@hotmail.com on Wed, Apr 04, 2001 at 01:04:02PM -0700 On Wed, Apr 04, 2001 at 01:04:02PM -0700, Karl M wrote: >Hi Corinna and All... > >Consider the following...Suppose sshd were modified so that password >authentication could succeed only if RSA authentication had almost succeeded >(meaning that the RSA authentication itself succeeded but the setuid >failed). Then the authentication sequence might look something like this: > >Client and server try RSA authentication. > >Server detects that RSA authentication succeeded but the setuid failed and >sets a flag to remember this fact. > >Server tells client that RSA authentication failed. > >Client and server try password authentication. > >Server checks the flag and only allows success if the flag is set. This >might be controlled by setting passwordAuthentication to "maybe" instead of >the usual "yes" or "no" in sshd_config. > >The result is that I have typed both a passphrase and a password correctly >in order to get in. This means that for any attacks by a listener on the >internet, I have the security of RSA authentication--which I believe is >better than most passwords. I also have the password needed to make life >good (and easy) in the NT world. > >Do you see any security holes? > >Would this be of general interest? Sounds like a question for the openssh mailing list. I doubt that anyone here besides Corinna can really answer this. cgf -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple