linux-kernel - Re: [RFC 2/2] initramfs with digital signature protection

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Message-ID: <20130205181926.GA13942@srcf.ucam.org>
Date:	Tue, 5 Feb 2013 18:19:26 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Dmitry Kasatkin <dmitry.kasatkin@...el.com>
Cc:	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC 2/2] initramfs with digital signature protection

On Tue, Feb 05, 2013 at 02:34:50PM +0200, Dmitry Kasatkin wrote:

> Digitally signed initramfs can be used to provide protected user-space
> environment for initialization purpose. For example, LSM, IMA/EVM can be
> securely initialized using such approach.

What stops an attacker from simply removing the signed image from the 
initramfs and running modified versions of the same tools from the 
unsigned image?

-- 
Matthew Garrett | mjg59@...f.ucam.org
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