From: Andy Lutomirski <luto@amacapital.net>
To: Christoph Lameter <cl@linux.com>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Ted Ts'o <tytso@mit.edu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Andrew G. Morgan" <morgan@kernel.org>,
Andrew Morton <akpm@linuxfoundation.org>,
LSM List <linux-security-module@vger.kernel.org>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Linux API <linux-api@vger.kernel.org>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
Austin S Hemmelgarn <ahferroin7@gmail.com>,
Aaron Jones <aaronmdjones@gmail.com>,
Serge Hallyn <serge.hallyn@canonical.com>,
Markku Savela <msa@moth.iki.fi>, Jonathan Corbet <corbet@lwn.net>
Subject: Re: [PATCH] capabilities: Ambient capability set V1
Date: Mon, 23 Feb 2015 15:51:33 -0800 [thread overview]
Message-ID: <CALCETrXnBvxG7i9A1Q8oS7kr8TG+FuGJMRVBQ_gFsxM6u=qdDA@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1502231040270.21784@gentwo.org>
On Feb 23, 2015 8:41 AM, "Christoph Lameter" <cl@linux.com> wrote:
>
> On Mon, 23 Feb 2015, Andy Lutomirski wrote:
>
> > If you set ambient caps and then run a setuid program (without
> > no_new_privs), then the ambient set *must* be cleared by the kernel
> > because that's what the setuid program expects. Yes, the whole
>
> Why would a setuid program expect that? I'd say we expect the ambient set
> to remain in effect. What would break if the ambient set would stay
> active?
>
On a total guess: exim, sendmail, sudo, Apache suexec, etc. Basically
anything that expects setresuid(nonzero values); execve to drop caps.
I haven't checked how many of the examples above actually do this.
--Andy
next prev parent reply other threads:[~2015-02-23 23:51 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-05 21:56 [PATCH] capabilities: Ambient capability set V1 Christoph Lameter
[not found] ` <alpine.DEB.2.11.1502051554500.4876-gkYfJU5Cukgdnm+yROfE0A@public.gmane.org>
2015-02-23 14:58 ` Christoph Lameter
2015-02-23 15:44 ` Andy Lutomirski
[not found] ` <CALCETrWJCcBBGGp21C4cdtiU79K-P3t+6rFJUWcXcLR1jqrrFQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-02-23 15:53 ` Christoph Lameter
2015-02-23 15:59 ` Andy Lutomirski
2015-02-23 16:41 ` Christoph Lameter
2015-02-23 23:51 ` Andy Lutomirski [this message]
2015-02-24 15:48 ` Christoph Lameter
2015-02-23 16:16 ` Serge Hallyn
2015-02-23 16:33 ` Andy Lutomirski
[not found] ` <CALCETrW78805ayUL=ZYBdFwVdDvJZus2JL0VVmEBE8=L1Nm5Sw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-02-23 16:45 ` Serge E. Hallyn
2015-02-23 16:47 ` Christoph Lameter
2015-02-23 16:44 ` Christoph Lameter
2015-02-23 16:46 ` Serge E. Hallyn
2015-02-23 16:50 ` Christoph Lameter
2015-02-23 18:15 ` Serge Hallyn
2015-02-23 18:27 ` Christoph Lameter
2015-02-24 5:19 ` Serge E. Hallyn
[not found] ` <20150224051928.GA14755-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2015-02-24 15:47 ` Serge E. Hallyn
2015-02-24 15:58 ` Christoph Lameter
2015-02-24 16:44 ` Serge Hallyn
2015-02-24 17:28 ` Christoph Lameter
2015-02-25 3:32 ` Serge Hallyn
2015-02-25 20:25 ` Christoph Lameter
2015-02-26 15:35 ` Serge E. Hallyn
[not found] ` <20150226153524.GC15182-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2015-02-26 18:28 ` Christoph Lameter
2015-02-26 19:32 ` Serge E. Hallyn
2015-02-26 19:38 ` Andy Lutomirski
[not found] ` <CALCETrWpKiurZEEOT25i_xrtQyk5dht+wjUO4+tGs+N_7JCdYA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-02-26 20:16 ` Christoph Lameter
2015-02-26 20:33 ` Serge E. Hallyn
[not found] ` <20150226193200.GA17709-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2015-02-26 20:13 ` Christoph Lameter
2015-02-26 20:34 ` Serge E. Hallyn
2015-02-26 20:51 ` Andy Lutomirski
2015-02-26 20:55 ` Serge E. Hallyn
[not found] ` <20150226205512.GA19273-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2015-02-26 20:58 ` Andy Lutomirski
2015-02-26 21:19 ` Serge E. Hallyn
2015-02-26 21:29 ` Christoph Lameter
2015-02-26 21:09 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1502261507450.8274-gkYfJU5Cukgdnm+yROfE0A@public.gmane.org>
2015-02-26 21:13 ` Serge E. Hallyn
2015-02-26 21:23 ` Christoph Lameter
2015-02-26 21:32 ` Serge E. Hallyn
2015-02-26 21:37 ` Christoph Lameter
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