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Article View: comp.security.misc
Article #770

Re: early Trojan Horse

#770
From: Steve McDowell
Date: Thu, 19 Nov 1992 19:40
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In message <956@dsbc.icl.co.uk> kev@dsbc.icl.co.uk (Kevin Walsh) writes:
>In article <1992Nov18.202710.9652@mcs.kent.edu> keithf@Nimitz.mcs.kent.edu (Keith Fuller) writes:
>
>> I heard that early UNIX systems came with a Trojan Horse.
>> As I remember, the C compiler would compile one of the utilities
>> in a way that would give a knowledgable person entry into any UNIX
>> system.
> 
> As I remember it, cc used to recognize a peice of code as being
> from the login program.  When you compiled login, the resulting
> executable would have a back door login in it.

Well, I don't know if that was ever implemented and I'd be very surprised if it
ever made it out of the lab if it was. 

This means of attack was discussed by Dennis Ritchie in an early papaer (mid-70's) 
on UNIX security as an option that's available to would-be-crackers with source code. 
If I remember correctly, the paper was distributed with the Version 7 manual set. 

-- 
Steve McDowell             . . . . o o o o o 		Opinions are 
Exlog, Inc.	                  _____      o     	mine, not my 
mcdowell@exlog.com      _____====  ]OO|_n_n__][.    	employers..
		       [_________]_|__|________)<   
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Message-ID: <1992Nov19.194057.19996@exlog.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!newsfeed.rice.edu!exlogcorp!mcdowell
References: <1992Nov18.202710.9652@mcs.kent.edu> <956@dsbc.icl.co.uk>

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From: mcdowell@exlog.com (Steve McDowell)
Subject: Re: early Trojan Horse
Message-ID: <1992Nov19.194057.19996@exlog.com>
Organization: EXLOG, Inc.
References: <1992Nov18.202710.9652@mcs.kent.edu> <956@dsbc.icl.co.uk>
Date: Thu, 19 Nov 92 19:40:57 GMT
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