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Date: Wed, 12 Feb 2020 15:22:21 +0000
From: Glen Barber <gjb@freebsd.org>
To: Nathan Dorfman <ndorf@rtfm.net>
Cc: freebsd-security@freebsd.org
Subject: Re: Cryptographic signatures of installer sets
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On Tue, Feb 11, 2020 at 11:31:32PM +0000, Nathan Dorfman wrote:
> > The patch I have at the moment looks for the MANIFEST (rather, the
> > <arch>-<target_arch>-<X.Y-RELEASE>) file in the location they are
> > installed by the misc/freebsd-release-manifests package.
>=20
> This seems reasonable, but I think the checksum script is also used by
> the system installer (not just the jail setup script).
>=20

No, they are two different sets of functionality.  The system installer
*always* uses the MANIFEST from the installation medium, but when fixing
that, I did not notice the jail subcommand, nor that it fetches a remote
MANIFEST file.

> Have you considered the possibility of simply publishing a detached
> signature with every MANIFEST, in a similar manner to what is done for
> the installer images?
>=20

I have not, as a change to the misc/freebsd-release-manifests port will
generate an email (or at minimum, a change in the repository), which
would be a red flag for nefarious behavior.

Glen


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