linux-kernel - Re: [PATCH v2] integrity: track mtime in addition to i

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Date:   Wed, 12 Jul 2017 13:56:50 -0400
From:   Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:     Bruce Fields <bfields@...ldses.org>
Cc:     jlayton@...hat.com, Jeff Layton <jlayton@...nel.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH v2] integrity: track mtime in addition to i_version for
 assessment

On Wed, 2017-07-12 at 10:35 -0400, Bruce Fields wrote:
> On Wed, Jul 12, 2017 at 08:20:21AM -0400, Mimi Zohar wrote:
> > Right, currently the only way of knowing is by looking at the IMA
> > measurement list to see if modified files are re-measured or, as you
> > said, by looking at the code.
> 
> Who's actually using this, and do they do any kind of checks, or
> document the filesystem-specific limitations?

Knowing who is using it and how it is being used is the big question.
 I only hear about it when there are problems.

Over the years, there have been a number of Linux Security Summit
(LSS) talks, which have been mostly about embedded systems or locked
down systems, not so much for generic systems.

Examples include:

- Design and Implementation of a Security Architecture for Critical
Infrastructure Industrial Control Systems - David Safford, GE 2016

- IMA/EVM: Real Applications for Embedded Networking Systems - Petko
Manolov, Konsulko Group, and Mark Baushke, Juniper Networks 2015

- CC3: An Identity Attested Linux Security Supervisor Architecture
 - Greg Wettstein, IDfusion 2015

- The Linux Integrity Subsystem and TPM-based Network Endpoint
Assessment - Andreas Steffen, HSR University of Applied Sciences
Rapperswil, Switzerland 2012

Mimi