linux-kernel - Re: [PATCH v2] net: don't allow CAP_NET_ADMIN to load non-netdev kernel modules

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Message-ID: <20110309220633.GA14750@albatros>
Date:	Thu, 10 Mar 2011 01:06:34 +0300
From:	Vasiliy Kulikov <segoon@...nwall.com>
To:	Michael Tokarev <mjt@....msk.ru>
Cc:	linux-kernel@...r.kernel.org, arnd@...db.de, mirqus@...il.com,
	netdev@...r.kernel.org, Ben Hutchings <bhutchings@...arflare.com>,
	David Miller <davem@...emloft.net>, kuznet@....inr.ac.ru,
	pekkas@...core.fi, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	kaber@...sh.net, eric.dumazet@...il.com, therbert@...gle.com,
	xiaosuo@...il.com, jesse@...ira.com, kees.cook@...onical.com,
	eugene@...hat.com, dan.j.rosenberg@...il.com
Subject: Re: [PATCH v2] net: don't allow CAP_NET_ADMIN to load non-netdev
 kernel modules

On Wed, Mar 02, 2011 at 10:15 +0300, Michael Tokarev wrote:
> 02.03.2011 00:33, Vasiliy Kulikov wrote:
> > Since a8f80e8ff94ecba629542d9b4b5f5a8ee3eb565c any process with
> > CAP_NET_ADMIN may load any module from /lib/modules/.  This doesn't mean
> > that CAP_NET_ADMIN is a superset of CAP_SYS_MODULE as modules are
> > limited to /lib/modules/**.  However, CAP_NET_ADMIN capability shouldn't
> > allow anybody load any module not related to networking.
> > 
> > This patch restricts an ability of autoloading modules to netdev modules
> > with explicit aliases.  This fixes CVE-2011-1019.
> []
> > Reference: https://lkml.org/lkml/2011/2/24/203
> > 
> > Signed-off-by: Vasiliy Kulikov <segoon@...nwall.com>
> 
> This looks much saner :)
> 
> Signed-off-by: Michael Tokarev <mjt@....msk.ru>

Is there any reason why it is not yet merged?  I've answered to Jake
Edge that it is not a regression.

Thanks,

-- 
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments
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