Re: About the login shell

To: Jason Dagit <dagit@engr.orst.edu>
Cc: Sean Neakums <sneakums@zork.net>, debian-hurd@lists.debian.org
Subject: Re: About the login shell
From: Moritz Schulte <moritz@duesseldorf.ccc.de>
Date: Tue, 20 Aug 2002 19:43:02 +0200
Message-id: <[🔎] 871y8th1eh.fsf@gryffindor.sc>
In-reply-to: <[🔎] Pine.GSO.4.44.0208200951410.19865-100000@eel.ENGR.ORST.EDU> (Jason Dagit's message of "Tue, 20 Aug 2002 09:57:14 -0700 (PDT)")
References: <[🔎] Pine.GSO.4.44.0208200951410.19865-100000@eel.ENGR.ORST.EDU>

Jason Dagit <dagit@engr.orst.edu> writes:

> It is a programmable interrupt, you just overwrite the function
> pointer the OS whats to use with your value.

Well, note the difference:

* login-fake-program-0 is simply a normal user program, which displays
  a login screen and receives the password.  No special privileges or
  deep system modifications are necessary.  This program will not
  survive ctrl-alt-del.

* login-fake-program-1 is (as you said) a program, which has such a
  power over the system that it can manipulate OS internal function
  pointers.

		moritz
-- 
moritz@duesseldorf.ccc.de - http://duesseldorf.ccc.de/~moritz/
GPG fingerprint = 3A14 3923 15BE FD57 FC06  B501 0841 2D7B 6F98 4199

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References:
- Re: About the login shell
  - From: Jason Dagit <dagit@engr.orst.edu>

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