full-disclosure - Re: Ubuntu 11.10 now unsecure by default

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Message-ID: <31207.1321626831@turing-police.cc.vt.edu>
Date: Fri, 18 Nov 2011 09:33:51 -0500
From: Valdis.Kletnieks@...edu
To: Dan Kaminsky <dan@...para.com>
Cc: full-disclosure@...ts.grok.org.uk, C de-Avillez <cerda@....org>
Subject: Re: Ubuntu 11.10 now unsecure by default

On Fri, 18 Nov 2011 06:10:00 PST, Dan Kaminsky said:

> OK, seriously.  If you're sitting in front of a machine that's presenting
> you a login prompt, you've got enough privileges to insert a bootable
> USB/CD and pull all the data / make yourself an account (FDE/Bios PW
> notwithstanding).

Right.  Which is why a passwordless guest account available to people who have
physical access isn't such a big deal.  The problem is that if you manage to
get ssh enabled, there's not *that* much stopping the account from being used
from Zanzibar.

Some operating systems (AIX, for instance) allowed tagging a userid as "local
access only", or even "may only login on tty 3, 5, and 23".  Adding that sort
of a tag to the guest account would help the situation by adding some
security in depth.

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