From: Vivek Goyal <vgoyal@redhat.com>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
linux-kernel@vger.kernel.org, pjones@redhat.com, hpa@zytor.com,
dhowells@redhat.com, jwboyer@redhat.com,
Dmitry Kasatkin <dmitry.kasatkin@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-security-module@vger.kernel.org
Subject: Re: [PATCH 2/3] binfmt_elf: Verify signature of signed elf binary
Date: Wed, 16 Jan 2013 16:53:41 -0500 [thread overview]
Message-ID: <20130116215341.GA4222@redhat.com> (raw)
In-Reply-To: <1358364290.4593.178.camel@falcor1>
On Wed, Jan 16, 2013 at 02:24:50PM -0500, Mimi Zohar wrote:
[..]
> > > Sorry, this is out of scope for IMA. Dmitry has looked into this, but
> > > I'm not sure where it stands at the moment.
> >
> > Ok, so that's one reason that why I wrote these patcehs. IMA currently
> > is not doing following things to make sure address space of signed images
> > is not modified by others.
> >
> > - Protecting against modifications to pages on swap.
> > - Protecting against modifications by ptrace.
> > - Protecting against modifications which bypassed filesystem and directly
> > wrote to the block.
> >
> > Locking down all the pages of signed binaries in memory hopefully should
> > solve above problems.
>
> Signing and verifying ELF executables goes back a long time ~2003/4,
> from a number of esteemed kernel developers, including Greg-KH and Serge
> Hallyn.
>
> IMA-appraisal isn't limited to appraising a single type of file, but is
> a generic mechanism for appraising all files. If there are issues that
> aren't being addressed, then by all means, please help by addressing
> them. Duplicating a large portion of the code is not productive.
So do you have ideas on how to address above mentioned issues. Do they
fit into the realm of IMA/EVM or I just need to write separate code (which
I have already done).
With above issues, IMA stuff for executable files sounds incomplete.
Thanks
Vivek
next prev parent reply other threads:[~2013-01-16 21:53 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-15 21:34 [PATCH 0/3] ELF executable signing and verification Vivek Goyal
2013-01-15 21:34 ` [PATCH 1/3] module: export couple of functions for use in process signature verification Vivek Goyal
2013-01-15 21:34 ` [PATCH 2/3] binfmt_elf: Verify signature of signed elf binary Vivek Goyal
2013-01-16 4:30 ` Eric W. Biederman
2013-01-16 4:55 ` Mimi Zohar
2013-01-16 7:10 ` Eric W. Biederman
2013-01-16 14:00 ` Mimi Zohar
2013-01-16 14:48 ` Vivek Goyal
2013-01-16 15:33 ` Mimi Zohar
2013-01-16 15:54 ` Vivek Goyal
2013-01-16 17:24 ` Mimi Zohar
2013-01-16 18:21 ` Vivek Goyal
2013-01-16 18:45 ` Mimi Zohar
2013-01-16 18:57 ` Vivek Goyal
2013-01-16 19:37 ` Mimi Zohar
2013-01-16 19:47 ` Vivek Goyal
2013-01-16 20:25 ` Mimi Zohar
2013-01-16 21:55 ` Vivek Goyal
2013-01-17 8:37 ` Elena Reshetova
2013-01-17 14:39 ` Kasatkin, Dmitry
2013-01-17 14:35 ` Kasatkin, Dmitry
2013-01-16 16:34 ` Vivek Goyal
2013-01-16 18:08 ` Mimi Zohar
2013-01-16 18:28 ` Vivek Goyal
2013-01-16 19:24 ` Mimi Zohar
2013-01-16 21:53 ` Vivek Goyal [this message]
2013-01-17 14:58 ` Kasatkin, Dmitry
2013-01-17 15:06 ` Kasatkin, Dmitry
2013-01-17 15:21 ` Vivek Goyal
2013-01-17 15:18 ` Vivek Goyal
2013-01-17 16:27 ` Kasatkin, Dmitry
2013-01-17 20:33 ` Frank Ch. Eigler
2013-01-17 20:55 ` Vivek Goyal
2013-01-17 21:46 ` Kasatkin, Dmitry
2013-01-17 21:52 ` Vivek Goyal
2013-01-20 16:36 ` Mimi Zohar
2013-01-21 16:42 ` Vivek Goyal
2013-01-21 18:30 ` Mimi Zohar
2013-01-16 22:35 ` Mimi Zohar
2013-01-16 22:51 ` Vivek Goyal
2013-01-16 23:16 ` Eric W. Biederman
2013-01-17 15:37 ` Mimi Zohar
2013-01-17 15:51 ` Vivek Goyal
2013-01-17 16:32 ` Mimi Zohar
2013-01-17 17:01 ` Kasatkin, Dmitry
2013-01-17 17:03 ` Kasatkin, Dmitry
2013-01-17 17:42 ` Vivek Goyal
2013-01-17 17:36 ` Vivek Goyal
2013-01-20 17:20 ` Mimi Zohar
2013-01-21 15:45 ` Vivek Goyal
2013-01-21 18:44 ` Mimi Zohar
2013-01-20 16:17 ` H. Peter Anvin
2013-01-20 16:55 ` Mimi Zohar
2013-01-20 17:00 ` H. Peter Anvin
2013-01-15 21:34 ` [PATCH 3/3] binfmt_elf: Do not allow exec() if signed binary has intepreter Vivek Goyal
2013-01-15 21:37 ` [PATCH 4/3] User space utility "signelf" to sign elf executable Vivek Goyal
2013-01-15 22:27 ` [PATCH 0/3] ELF executable signing and verification richard -rw- weinberger
2013-01-15 23:15 ` Vivek Goyal
2013-01-15 23:17 ` richard -rw- weinberger
2013-01-17 16:22 ` Kasatkin, Dmitry
2013-01-17 17:25 ` Vivek Goyal
2013-01-22 4:22 ` Rusty Russell
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