linux-kernel - Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)

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Message-ID: <551280e51001180756q2a438d3cv99bbb4e87eb073f4@mail.gmail.com>
Date:	Mon, 18 Jan 2010 07:56:47 -0800
From:	"Andrew G. Morgan" <morgan@...nel.org>
To:	Valdis.Kletnieks@...edu
Cc:	Pavel Machek <pavel@....cz>, Michael Stone <michael@...top.org>,
	James Morris <jmorris@...ei.org>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-security-module@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>, David Lang <david@...g.hm>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Bryan Donlan <bdonlan@...il.com>,
	Evgeniy Polyakov <zbr@...emap.net>,
	"C. Scott Ananian" <cscott@...ott.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Bernie Innocenti <bernie@...ewiz.org>,
	Mark Seaborn <mrs@...hic-beasts.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	"Am?rico Wang" <xiyou.wangcong@...il.com>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	Samir Bellabes <sam@...ack.fr>,
	Casey Schaufler <casey@...aufler-ca.com>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 2/3] Security: Implement disablenetwork semantics. (v4)

On Mon, Jan 18, 2010 at 4:54 AM,  <Valdis.Kletnieks@...edu> wrote:
> (Interestingly enough, the capabilities bug came *later*:
>
> 8.12.1/8.12.1   2001/10/01
>        SECURITY: Check whether dropping group privileges actually succeeded
>                to avoid possible compromises of the mail system by
>                supplying bogus data.  Add configuration options for
>                different set*gid() calls to reset saved gid.  Problem
>                found by Michal Zalewski.
>
> and was mostly an issue because the same problem existed in pre-8.12 sendmails
> that were still setuid and hadn't upgraded yet...
>
>

I think the above was 'a' sendmail bug. 'The' capabilities bug came before that:

http://userweb.kernel.org/~morgan/sendmail-capabilities-war-story.html

Cheers

Andrew
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