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Date:	Mon, 11 Jan 2010 12:53:32 +0100
From:	Pavel Machek <>
To:	Bryan Donlan <>
Cc:	Casey Schaufler <>,
	Michael Stone <>,
	Kyle Moffett <>,,,,
	Andi Kleen <>, David Lang <>,
	Oliver Hartkopp <>,
	Alan Cox <>,
	Herbert Xu <>,
	Valdis Kletnieks <>,
	Evgeniy Polyakov <>,
	"C. Scott Ananian" <>,
	James Morris <>,
	"Eric W. Biederman" <>,
	Bernie Innocenti <>,
	Mark Seaborn <>,
	Randy Dunlap <>,
	Am?rico Wang <>,
	Tetsuo Handa <>,
	Samir Bellabes <>,
	"Serge E. Hallyn" <>,
	Al Viro <>
Subject: Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)


> * If network access is restored over suid, then we can leak data over
> ping or any number of other routes, so that's right out.


> * If network access is denied over suid, there are concerns of denial
> of service in certain configurations.

So that should be right out, too.

> * If suid is denied entirely, we have no denial of service or
> information leak concerns via the suid mechanism (since the mechanism
> is completely unusable). And if we really do need to execute something
> at an elevated privilege, we can ask a helper daemon to do it on our
> behalf.

Yes please. This is the obvious solution.

(cesky, pictures)
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