From: Pavel Machek <pavel@ucw.cz>
To: Christoph Lameter <cl@linux.com>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>,
Serge Hallyn <serge.hallyn@canonical.com>,
Andy Lutomirski <luto@amacapital.net>,
Jonathan Corbet <corbet@lwn.net>,
Aaron Jones <aaronmdjones@gmail.com>, "Ted Ts'o" <tytso@mit.edu>,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, akpm@linuxfoundation.org,
morgan@kernel.org
Subject: Re: [capabilities] Allow normal inheritance for a configurable set of capabilities
Date: Wed, 25 Feb 2015 22:50:14 +0100 [thread overview]
Message-ID: <20150225215014.GD29527@amd> (raw)
In-Reply-To: <alpine.DEB.2.11.1502030920050.6059@gentwo.org>
Hi!
> > A key concept behind posix capabilities is that the privilege comes from
> > both the person and the file being executed. As you say below basically
> > anything can be executed by the program so that is completely violated.
>
> Well this patch does not change that. Its just that the file being
> executed can inherit the parent caps without having to set caps in the new
> executable.
>
> > Still, it's not that different from mmapping some arbitrary code and
> > jumping into it whlie retaining caps.
>
> Owww. Thats a pretty far jump from what this patch does.
>
> > Not saying this is a good idea necessarily, but worth thinking about.
>
> Well we keep on having actual problems with caps for long years now. We
> need a solution. This means a patch that solves the issue.
One solution is to put capabilities into the elf executable. I believe
there was patch for that. That means you don't need to add capability
support into filesystems...
Old documentation is at
http://atrey.karlin.mff.cuni.cz/~pavel/elfcap.html
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2015-02-25 21:50 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 16:21 [capabilities] Allow normal inheritance for a configurable set of capabilities Christoph Lameter
2015-02-02 17:12 ` Serge Hallyn
2015-02-02 17:18 ` Andy Lutomirski
2015-02-02 18:09 ` Serge Hallyn
2015-02-03 15:16 ` Christoph Lameter
2015-02-03 15:23 ` Christoph Lameter
2015-02-03 15:55 ` Serge E. Hallyn
2015-02-03 17:18 ` Christoph Lameter
2015-02-03 17:26 ` Serge E. Hallyn
2015-02-04 15:15 ` Andrew G. Morgan
2015-02-04 15:50 ` Christoph Lameter
2015-02-04 15:56 ` Serge E. Hallyn
2015-02-04 16:12 ` Andrew G. Morgan
2015-02-04 16:34 ` Andy Lutomirski
2015-02-04 16:54 ` Andrew G. Morgan
2015-02-04 17:34 ` Serge E. Hallyn
2015-02-04 18:12 ` Christoph Lameter
2015-02-04 16:43 ` Christoph Lameter
2015-02-04 16:27 ` Andy Lutomirski
2015-02-05 0:34 ` Serge E. Hallyn
2015-02-05 15:23 ` Serge E. Hallyn
2015-02-25 21:50 ` Pavel Machek [this message]
2015-02-25 23:59 ` Christoph Lameter
2015-02-26 12:27 ` Pavel Machek
2015-02-27 20:15 ` Andy Lutomirski
2015-02-27 20:48 ` Pavel Machek
2015-02-27 20:56 ` Andy Lutomirski
2015-02-27 22:47 ` Pavel Machek
2015-02-02 17:54 ` Casey Schaufler
2015-02-02 18:08 ` Serge Hallyn
2015-02-02 18:47 ` Mimi Zohar
2015-02-02 19:05 ` Austin S Hemmelgarn
2015-02-02 20:35 ` Casey Schaufler
2015-02-03 16:04 ` Serge E. Hallyn
2015-02-02 19:00 ` Casey Schaufler
2015-02-05 0:20 ` Serge E. Hallyn
2015-02-02 20:37 ` Andy Lutomirski
2015-02-02 20:54 ` Casey Schaufler
2015-02-03 15:51 ` Serge E. Hallyn
2015-02-03 16:37 ` Casey Schaufler
2015-02-03 17:28 ` Serge E. Hallyn
2015-02-03 17:50 ` Casey Schaufler
2015-02-03 19:45 ` Christoph Lameter
2015-02-03 20:13 ` Andy Lutomirski
2015-02-03 23:14 ` Christoph Lameter
2015-02-03 23:17 ` Andy Lutomirski
2015-02-04 2:27 ` Christoph Lameter
2015-02-04 6:05 ` Markku Savela
2015-02-04 13:17 ` Christoph Lameter
2015-02-04 13:41 ` Markku Savela
2015-02-04 14:56 ` Jarkko Sakkinen
2015-02-03 15:17 ` Christoph Lameter
2015-02-03 15:40 ` Casey Schaufler
2015-02-03 15:46 ` Serge E. Hallyn
2015-02-03 17:19 ` Christoph Lameter
2015-02-03 17:29 ` Serge E. Hallyn
2015-02-25 21:50 ` Pavel Machek
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