From: Christoph Hellwig <hch@infradead.org>
To: "Kristian Sørensen" <ks@cs.aau.dk>
Cc: umbrella-devel@lists.sourceforge.net,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [Umbrella-devel] Re: Getting full path from dentry in LSM hooks
Date: Sat, 4 Sep 2004 12:09:58 +0100 [thread overview]
Message-ID: <20040904120958.B14123@infradead.org> (raw)
In-Reply-To: <4138CBEF.9000909@cs.aau.dk>; from ks@cs.aau.dk on Fri, Sep 03, 2004 at 09:54:23PM +0200
On Fri, Sep 03, 2004 at 09:54:23PM +0200, Kristian Sørensen wrote:
> >>We are working on a project called Umbrella, (umbrella.sf.net) which
> >>implements processbased mandatory accesscontrol in the Linux kernel.
> >>This access control is controlled by "restriction", e.g. by restricting
> >> some process from accessing any given file or directory.
> >>
> >>E.g. if a root owned process is restricted from accessing /var/www, and
> >>the process is compromised by an attacker, no mater what he does, he
> >>would not be able to access this directory.
> >
> >
> > mount --bind /var/www /home/joe/p0rn/, and then?
> Actually this "attack" is avoided, because restrictions are enherited,
> from parent proces to its children.
If you restrict your process on the path /var/ww/ but the same objects
are also available below a different path, what does that have to do with
child processes?
next prev parent reply other threads:[~2004-09-04 11:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-03 12:12 Getting full path from dentry in LSM hooks Kristian Sørensen
2004-09-03 12:32 ` Christoph Hellwig
2004-09-03 12:38 ` [Umbrella-devel] " Kristian Sørensen
2004-09-03 13:04 ` Christoph Hellwig
2004-09-03 13:20 ` Kristian Sørensen
2004-09-03 14:01 ` Christoph Hellwig
2004-09-03 19:54 ` Kristian Sørensen
2004-09-04 11:09 ` Christoph Hellwig [this message]
2004-09-04 18:52 ` Kristian Sørensen
2004-09-03 15:38 ` Stephen Smalley
2004-09-03 12:43 ` Andrea Arcangeli
2004-09-03 14:14 ` Alan Cox
2004-09-03 20:05 ` [Umbrella-devel] " Kristian Sørensen
2004-09-03 20:39 ` Valdis.Kletnieks
2004-09-04 9:06 ` Kristian Sørensen
2004-09-04 10:50 ` Emmanuel Fleury
2004-09-07 14:19 ` Kristian Sørensen
2004-09-04 2:41 ` Horst von Brand
2004-09-04 19:01 ` Kristian Sørensen
2004-09-04 19:06 ` Kristian Sørensen
2004-09-04 16:56 ` Alan Cox
2004-09-04 18:47 ` Kristian Sørensen
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