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Article View: comp.security.misc
Article #289

Re: Beta testers needed for security tool

#289
From: Paul A. Karger
Date: Tue, 08 Sep 1992 16:41
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In article <WESOMMER.92Sep7144915@bill-the-cat.mit.edu>, wesommer@mit.edu (Bill Sommerfeld) writes:
|> In article <18g4c7INNihj@matt.ksu.ksu.edu> holland@matt.ksu.ksu.edu (Rich Holland) writes:
|> 
|>    Ross Ridge <ross@zooid.guild.org> writes:
|> 
|>    >While this would be what I'd do, even this isn't 100% guaranteed if
|>    >someone has broken security on the machine.  It's possible, for instance,
|>    >that the mount command, shell or even kernel has been hacked to prevent
|>    >tripwire from doing it's job properly.
|> 
|>    *shaking head*  Man, some people can get just a LITTLE too paranoid!
|> 
|>    ...
|> 
|>    ...some people need a better sense of reality! 
|> 
|> You're one of them :-) 
|> 
|> For the record, there have been a number of instances of break-ins on
|> the Internet involving hacked operating systems software..  typically
|> /bin/login and/or telnet and/or telnetd.
|> 
|> Hacking the shell isn't too much harder than hacking any other
|> user-mode program.
|> 
|> It's a *lot* harder to replace write-protected boot media in a locked
|> cabinet through the network.
|> 
|> Multics, one of the most usable of secure systems (and most secure of
|> usuable systems), was always booted from a write-protected *tape*,
|> which contained the boot loader, kernel-equivalent, shared libraries,
|> and critical commands.
|> --

And even Multics fell victim to a hacked shell at one point in its life.
I recall a case back in '69 or thereabouts when one of the system 
administrators was given a hacked shell that displayed a convincing
error message and then hung up the modem.   That administrator spent
several days looking for a system bug, before discovering the hacked
shell.

Just because you're paranoid, DOESN'T mean that they aren't out to
get you, anyway!
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Message-ID: <1992Sep8.164108.1617@osf.org>
Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!think.com!paperboy.osf.org!osf.org!karger
References: <18e5kgINNkpf@matt.ksu.ksu.edu> <Bu6r2q.AG5@mentor.cc.purdue.edu> <WESOMMER.92Sep7144915@bill-the-cat.mit.edu>

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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!think.com!paperboy.osf.org!osf.org!karger
From: karger@osf.org (Paul A. Karger)
Newsgroups: comp.security.misc,alt.security,alt.sources.d,comp.sources.testers,comp.unix.admin
Subject: Re: Beta testers needed for security tool
Message-ID: <1992Sep8.164108.1617@osf.org>
Date: 8 Sep 92 16:41:08 GMT
References: <18e5kgINNkpf@matt.ksu.ksu.edu> <Bu6r2q.AG5@mentor.cc.purdue.edu> <WESOMMER.92Sep7144915@bill-the-cat.mit.edu>
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Organization: Open Software Foundation
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