linux-kernel - Re: Re: [PATCH v2 3/3] efi: Capsule update with user helper interface

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 3 Mar 2015 21:49:56 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	"Kweh, Hock Leong" <hock.leong.kweh@...el.com>,
	Matt Fleming <matt@...sole-pimps.org>,
	Sam Protsenko <semen.protsenko@...aro.org>,
	Ming Lei <ming.lei@...onical.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Ong, Boon Leong" <boon.leong.ong@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>
Subject: Re: Re: [PATCH v2 3/3] efi: Capsule update with user helper interface

On Tue, Mar 03, 2015 at 12:37:54PM -0800, Andy Lutomirski wrote:
> The user *should not* be required to have write access to anything in
> /lib to install a UEFI capsule that they download from their
> motherboard vendor's website.  /lib belongs to the distro, and UEFI
> capsules do not belong to the distro.  In this regard, UEFI capsules
> are completely unlike your wireless card firmware, your cpu microcode,
> etc.

Oh oh but but, if an UEFI capsule can brick the system, a normal user
would be able to brick that system then. I think we should forbid that.

I agree with the rest of your note that a simple

cat <fw_blob> > /sys/...

should be enough.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/