Article View: comp.security.misc
Article #397Re: RFC931 (was Re: Fake headers on Internet mail)
From: John Hascall
Date: Mon, 17 Aug 1992 04:13
Date: Mon, 17 Aug 1992 04:13
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rouilj@dl5000.bc.edu (John P. Rouillard) writes: }> Why don't I trust root? I don't know you. And, on the majority of UNIX }> machines it is fairly simple for any user to become root. }Well, how simple it is depends on the system. Currently I have systems }that can be rebooted into root mode. However, when that is done, the }experimental rfc931 server (no, it is not available for public access }or use yet) that runs on that machine loses its encryption key. Thus }by getting an rfc931 identifier that says "rouilj" I can tell you }immediately that it isn't a valid identifier since there was no way }you should be able to get an unencrypted identifier out of one of my }properly operating servers. Thus there is a high degree of }probability that that letter was forged. If I were the user who booted into root mode I would also fire up a simple daemon on the rfc931 port which always answered every request with "SDdf;sadf344sagfarg" (or whatever identifier I had seen myself recently in mail to me). John -- John Hascall ``Live with it pink-boy!'' Project Vincent Iowa State University Computation Center john@iastate.edu Ames, IA 50011 515/294-9551 [fax -1717]
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Newsgroups: comp.security.misc Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!sdd.hp.com!ux1.cso.uiuc.edu!news.iastate.edu!john From: john@iastate.edu (John Hascall) Subject: Re: RFC931 (was Re: Fake headers on Internet mail) Message-ID: <1992Aug17.041338.4472@news.iastate.edu> Sender: news@news.iastate.edu (USENET News System) Organization: Iowa State University, Ames, IA References: <1992Aug14.173113.5978@fwi.uva.nl> <1992Aug14.191748.11505@reed.edu> <ROUILJ.92Aug16141523@dl5000.bc.edu> Date: Mon, 17 Aug 1992 04:13:38 GMT Lines: 25