linux-kernel - Re: [PATCH] USB: disable all RNDIS protocol drivers

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Message-ID: <87o7sxofxe.fsf@kernel.org>
Date:   Wed, 23 Nov 2022 17:21:01 +0200
From:   Kalle Valo <kvalo@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Maciej Żenczykowski <maze@...gle.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Andrzej Pietrasiewicz <andrzejtp2010@...il.com>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Łukasz Stelmach <l.stelmach@...sung.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org,
        Ilja Van Sprundel <ivansprundel@...ctive.com>,
        Joseph Tartaro <joseph.tartaro@...ctive.com>
Subject: Re: [PATCH] USB: disable all RNDIS protocol drivers

Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:

> The Microsoft RNDIS protocol is, as designed, insecure and vulnerable on
> any system that uses it with untrusted hosts or devices.  Because the
> protocol is impossible to make secure, just disable all rndis drivers to
> prevent anyone from using them again.
>
> Windows only needed this for XP and newer systems, Windows systems older
> than that can use the normal USB class protocols instead, which do not
> have these problems.
>
> Android has had this disabled for many years so there should not be any
> real systems that still need this.
>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: Kalle Valo <kvalo@...nel.org>
> Cc: Oleksij Rempel <linux@...pel-privat.de>
> Cc: "Maciej Żenczykowski" <maze@...gle.com>
> Cc: Neil Armstrong <neil.armstrong@...aro.org>
> Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
> Cc: Andrzej Pietrasiewicz <andrzejtp2010@...il.com>
> Cc: Jacopo Mondi <jacopo@...ndi.org>
> Cc: "Łukasz Stelmach" <l.stelmach@...sung.com>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: linux-usb@...r.kernel.org
> Cc: netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-wireless@...r.kernel.org
> Reported-by: Ilja Van Sprundel <ivansprundel@...ctive.com>
> Reported-by: Joseph Tartaro <joseph.tartaro@...ctive.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> ---
> Note, I'll submit patches removing the individual drivers for later, but
> that is more complex as unwinding the interaction between the CDC
> networking and RNDIS drivers is tricky.  For now, let's just disable all
> of this code as it is not secure.
>
> I can take this through the USB tree if the networking maintainers have
> no objection.  I thought I had done this months ago, when the last round
> of "there are bugs in the protocol!" reports happened at the end of
> 2021, but forgot to do so, my fault.
>
>  drivers/net/usb/Kconfig           | 1 +
>  drivers/net/wireless/Kconfig      | 1 +

For wireless:

Acked-by: Kalle Valo <kvalo@...nel.org>

Feel free to take this via your tree.

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches