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Network Security Secure-Shell
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Re: authentication method shell variable?

from [Greg Wooledge] Network Security [Permanent Link]
Subject: Re: authentication method shell variable?
Date: Mon, 28 Aug 2006 08:49:26 -0400 
On Sun, Aug 27, 2006 at 07:28:06AM -0400, Jaqui Greenlees wrote:

In a recent discussion about secure ssh use the idea
of having ssh export the authentication method as a
shll variable. The idea being to limit su access to
only those who have used a public / private key pair
for authentication.


What prevents the black-hat cracker from simply setting that environment
variable after getting in using a password?

Although it would be more work, you might consider developing a system
that grants group membership (e.g. in the "wheel" group) after appropriate
authentication.  Then restrict "su" to those who are in that group.
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