From: Arjan van de Ven <arjanv@redhat.com>
To: Willy TARREAU <willy@w.ods.org>
Cc: marcelo@conectiva.com.br, viro@parcelfarce.linux.theplanet.co.uk,
linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH-2.4] Prevent mounting on ".."
Date: 29 Jun 2003 16:09:40 +0200 [thread overview]
Message-ID: <1056895780.1720.1.camel@laptop.fenrus.com> (raw)
In-Reply-To: <20030629130952.GA246@pcw.home.local>
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On Sun, 2003-06-29 at 15:09, Willy TARREAU wrote:
> Hi Al and Marcelo,
>
> while I was trying to get maximum restrictions on a chroot on 2.4.21-pre,
> I found that it's always possible to mount a ramfs or a tmpfs on "..",
> and then upload whatever I wanted in it. It's a shame because I was
> trying to isolate network daemons inside empty, read-only file-systems,
> and I discovered that this effort was worthless. To resume, imagine a
> network daemon which does :
well...
you need to be root to mount. If you're root you can break out of a
chroot anyway....
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next prev parent reply other threads:[~2003-06-29 13:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-29 13:09 Willy TARREAU
2003-06-29 14:09 ` Arjan van de Ven [this message]
2003-06-29 14:24 ` Willy TARREAU
2003-06-29 14:11 ` viro
2003-06-29 14:20 ` Willy TARREAU
2003-06-29 14:27 ` viro
2003-06-29 14:35 ` Willy TARREAU
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