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From: pmh@pilhuhn.de (Patrick M.Hausen)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: PTY's reused to quickly
Date: 21 Sep 1995 20:19:24 +0200
Organization: The Home Of The Pilhuhn
Lines: 26
Message-ID: <43sabc$37@pilhuhn.pilhuhn.de>
References: <431of5$ffm@voyager.internex.net> <43c9lv$8jv@helena.MT.net>
NNTP-Posting-Host: pilhuhn.de
nate@trout.sri.MT.net (Nate Williams) writes:
>In article <431of5$ffm@voyager.internex.net>,
>Grant Haidinyak <grant@iwv.com> wrote:
>>I've noticed that if a user logs into FreeBSD 2.0.5 Release, and the session
>>unexpectedly gets aborted (ie the user's DOS machine crashes), then the pty
>>stays open. Then when another user logs into the FreeBSD box, they get the same
>>pty assigned to them, and they also get attached to the same shell session (as
>>well as the new shell session), quite annoying.
>It's not only annoying, but I'd consider this a big security hold. Is
>this happening with modems or network sessions? I could see this
>happening with modems, but I've *never* seen this bug with a network
>session.
I experienced exactly the same phenomenon. When I terminate a shell session
within an Xterm by clicking on the "close window" button, and open another
Xterm quickly, I find myself with _2_ shells connected to the same pty.
Commands go to them somewhat alternating like when running two gettys on
the same line.
--
Patrick M. Hausen Gerwigstr. 11 76131 Karlsruhe Tel. +49 721 699234
pmh@pilhuhn.sub.org s_hausen@ira.uka.de IRC: cutie
"You can fool all of the people some of the time and some of the
people all of the time, but you can't fool Mom." (Captain Penny's Law)