Date: Sun, 27 Dec 2009 19:06:12 +0100
From: Pavel Machek <pavel@ucw.cz>
To: Michael Stone <michael@laptop.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>, linux-kernel@vger.kernel.org,
       netdev@vger.kernel.org, linux-security-module@vger.kernel.org,
       Andi Kleen <andi@firstfloor.org>, David Lang <david@lang.hm>,
       Oliver Hartkopp <socketcan@hartkopp.net>,
       Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Herbert Xu <herbert@gondor.apana.org.au>,
       Valdis Kletnieks <Valdis.Kletnieks@vt.edu>,
       Bryan Donlan <bdonlan@gmail.com>, Evgeniy Polyakov <zbr@ioremap.net>,
       "C. Scott Ananian" <cscott@cscott.net>,
       James Morris <jmorris@namei.org>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Bernie Innocenti <bernie@codewiz.org>,
       Mark Seaborn <mrs@mythic-beasts.com>,
       Randy Dunlap <randy.dunlap@oracle.com>,
       =?iso-8859-1?Q?Am=E9rico?= Wang <xiyou.wangcong@gmail.com>,
       Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
       Samir Bellabes <sam@synack.fr>,
       Casey Schaufler <casey@schaufler-ca.com>
Subject: Re: RFC: disablenetwork facility. (v4)
Message-ID: <20091227180612.GG11737@elf.ucw.cz>
References: <20091227161203.GA20031@hallyn.com>
 <20091227163609.GD12645@heat>
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> >I thought that disabling network was a completely
> >unprivileged operation?  And subsequently executing a setuid-root
> >application won't reset the flag.
> 
> Correct and correct for the current patches.

Then you are introducing a security problem. User can now mess with
setuid0 binary.

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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