linux-kernel - Re: [PATCH 00/14] EVM

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Message-ID: <alpine.LRH.2.00.1006041052450.1003@tundra.namei.org>
Date:	Fri, 4 Jun 2010 10:57:51 +1000 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
cc:	Shaz <shazalive@...il.com>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	David Safford <safford@...son.ibm.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Arjan van de Ven <arjan@...radead.org>,
	securityengineeringresearchgroup 
	<securityengineeringresearchgroup@...glegroups.com>
Subject: Re: [PATCH 00/14] EVM

On Tue, 1 Jun 2010, Mimi Zohar wrote:

> SELinux, Smack, Capabilities, and IMA all use extended attributes. The
> purpose of EVM is to detect offline tampering of these security extended
> attributes.

One issue mentioned to me off-list is that if EVM is only protecting 
against offline attacks, why not just encrypt the entire volume ?

This would provide confidentiality and integrity protection for all data 
and metadata, rather than just integrity for xattr metadata.


- James
-- 
James Morris
<jmorris@...ei.org>
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