From: Steve Grubb <sgrubb@redhat.com>
To: "Andrew G. Morgan" <morgan@kernel.org>
Cc: Eric Paris <eparis@redhat.com>,
linux-kernel@vger.kernel.org,
"Serge E. Hallyn" <serge@canonical.com>,
"Serge E. Hallyn" <serge.hallyn@canonical.com>,
linux-security-module@vger.kernel.org
Subject: Re: [PATCH] System Wide Capability Bounding Set
Date: Thu, 27 Jan 2011 11:50:16 -0500 [thread overview]
Message-ID: <201101271150.17120.sgrubb@redhat.com> (raw)
In-Reply-To: <AANLkTi=k5QeE_-iNuW3-M5K3BnBtRxk-QYO5624HKrpE@mail.gmail.com>
On Thursday, January 27, 2011 11:35:13 am Andrew G. Morgan wrote:
> > Today, people want to have multi-tenant hosting using virtual
> > machines whereby they give away root control of the guest VM.
> > If you were renting system space, you would expect root access.
> > That would make a nice juicy hacking target because you don't know
> > who else is sharing the physical machine with you and they might
> > have something in their VM worth stealing.
>
> Which root filesystem (/) do kernel helpers run in in such a virtual setup?
I would assume that root in the VM could umount and mount anything. Or bind mount over
it. We really want any change to a global bounding set done before initrd finishes
doing its thing. This way there is no chance for mischief by the time control is
turned over to /sbin/init - which root controls.
-Steve
next prev parent reply other threads:[~2011-01-27 16:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-05 22:25 [PATCH] System Wide Capability Bounding Set Eric Paris
2011-01-06 11:30 ` Tetsuo Handa
2011-01-06 16:44 ` Theodore Tso
2011-01-11 22:02 ` Serge E. Hallyn
2011-01-11 22:12 ` Serge E. Hallyn
2011-01-14 19:50 ` Eric Paris
2011-01-17 3:16 ` Andrew G. Morgan
2011-01-21 21:25 ` Eric Paris
2011-01-23 3:39 ` Andrew G. Morgan
2011-01-24 21:40 ` Serge Hallyn
2011-01-26 23:34 ` Eric Paris
2011-01-27 14:02 ` Serge E. Hallyn
2011-01-27 14:42 ` Steve Grubb
2011-01-27 16:43 ` Andrew G. Morgan
[not found] ` <AANLkTi=k5QeE_-iNuW3-M5K3BnBtRxk-QYO5624HKrpE@mail.gmail.com>
2011-01-27 16:50 ` Steve Grubb [this message]
2011-01-28 18:19 ` Eric Paris
2011-01-28 18:49 ` Serge E. Hallyn
2011-01-28 19:10 ` Steve Grubb
2011-01-28 19:38 ` Serge E. Hallyn
2011-01-28 22:24 ` Eric Paris
2011-02-01 18:17 ` Eric Paris
2011-02-01 21:26 ` Serge E. Hallyn
2011-02-02 4:02 ` Andrew G. Morgan
2011-02-08 2:55 ` Eric Paris
2011-02-14 20:45 ` Eric Paris
2011-02-14 21:24 ` Serge E. Hallyn
2011-02-18 0:29 ` Serge E. Hallyn
2011-01-27 14:26 ` Andrew G. Morgan
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