Article View: gnu.emacs.bug
Article #972Re: movemail bug?
From: Jym Dyer
Date: Tue, 26 Jan 1993 01:50
Date: Tue, 26 Jan 1993 01:50
29 lines
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1782 bytes
> I've been unable to persuade my sysadmin to make the movemail
> routine setuid because they believe it will compromise system
> security. I assume that they are referring to the bug that
> I seem to remember being described in Clifford Stoll's book
> `The Cukoo's Egg'.
=o= That problem's been fixed long ago. See the file FAQ in
the Emacs etc directory. I quote:
> 1. the `movemail' incident (No, this is not a risk.)
>
> Cliff Stoll in his book "The Cuckoo's Egg" describes this in chapter 4.
> The site at LBL had installed the `etc/movemail' program setuid root.
> Since `movemail' had not been designed for this situation, a security
> hole was created and users could get root priveleges.
>
> `movemail' has since been changed so that even if it is installed
> setuid root this security hole will not be a result.
=o= It should be noted that Stoll's description of the cause of
the problem is exactly the opposite of reality: He claimed that
the security hole was a bug in movemail, and contrasted it with
security holes caused by sysadmins installing things wrong. As
we can see above, the problem actually *was* caused by sysadmins
installing things wrong.
=o= Stoll should write an apology/retraction, and should see to
it that it's distributed widely.
<_Jym_>
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Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!mica.berkeley.edu!jym From: jym@mica.berkeley.edu (Jym Dyer) Newsgroups: gnu.emacs.bug Subject: Re: movemail bug? Date: 25 Jan 1993 20:50:00 -0500 Organization: The Naughty Peahen Party Line Lines: 30 Sender: daemon@cis.ohio-state.edu Approved: bug-gnu-emacs@prep.ai.mit.edu Distribution: gnu Message-ID: <Jym.24Jan1993.1758@naughty-peahen> References: <1993Jan21.112654.6681@cs.nott.ac.uk>