From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: PTY DOS vulnerability?
Date: 2 Jul 2003 18:52:21 -0700 [thread overview]
Message-ID: <be028l$q69$1@cesium.transmeta.com> (raw)
In-Reply-To: 03070220143600.04348@tabby
Followup to: <03070220143600.04348@tabby>
By author: Jesse Pollard <jesse@cats-chateau.net>
In newsgroup: linux.dev.kernel
> >
> > Isn't this something a improved sshd could do? I.e. if the
> > connection using up the last (or one of the last) pty's logs
> > in as non-root - just kill it.
>
> and how is it to determine that it is the last?
> try two and die if the second fails???
> at least one system just creates more ptys...
>
Viro's working on it... but as someone else pointed out,
"ssh root@machine bash -i" works great without any ptys. You don't
have all features, but enough to nuke whatever it is that's eating
them all.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64
next prev parent reply other threads:[~2003-07-03 1:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-30 14:18 PTY DOS vulnerability? Fredrik Tolf
2003-06-30 17:55 ` Alan Cox
2003-06-30 21:31 ` Fredrik Tolf
2003-06-30 21:36 ` Alan Cox
2003-07-01 12:15 ` Jesse Pollard
2003-07-01 13:41 ` Timothy Miller
2003-07-01 6:22 ` Oleg Drokin
2003-07-01 11:57 ` Jesse Pollard
2003-07-01 19:53 ` Helge Hafting
2003-07-02 6:42 ` Paul Rolland
2003-07-03 1:14 ` Jesse Pollard
2003-07-03 1:52 ` H. Peter Anvin [this message]
2003-07-08 23:11 Clayton Weaver
2003-07-09 10:08 ` Svein Ove Aas
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