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Re: webRTC and Content Security Policy connect-src

From: Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com>
Date: Wed, 17 Jan 2018 09:53:09 +0100
To: public-webrtc@w3.org
Message-ID: <2be69adc-1128-af8f-3292-21a3c4fefe82@gmail.com>
Does anyone know of any major webrtc deployment that uses CSP and webrtc 

Best regards

On 17/01/2018 1:14, Stephen Farrell wrote:
> Hiya,
> On 16/01/18 23:24, Martin Thomson wrote:
>> On Wed, Jan 17, 2018 at 5:50 AM, Roman Shpount <roman@telurix.com> wrote:
>>> I almost feel that blocking WebRTC completely and then figuring out correct
>>> way to unblock it (through IdP or candidate signing) is a better option.
>> This is where I'm at.  Provide a big switch and then investigate more
>> granular controls that might allow some sites to get some better
>> control.
> Can we ensure that any such big switch or granular control
> does not in practice create a major bias towards requiring
> involvement from some major web property before a random
> web site can deploy WebRTC with CSP?
> Maybe I'm overly concerned, but there could be significant
> problems with whitelists in this space acting to further
> entrench the biggest players generally getting to see or
> control JS or traffic, even if the web sites didn't really
> want to have that happen.
> Cheers,
> S.
>> Given the complexity of that granular control, shipping the
>> big switch would seem to be a good initial strategy.  Though I would
>> want to make sure that we had an option to narrow things.
>> In designing this switch, we should not preclude the later addition of
>> more granular controls, so that needs to be considered as well.
>> Finally, using connect-src to govern this is not free of compatibility
>> risks.  Sites that have CSP and use WebRTC can't be the empty set at
>> this point.  We need to understand whether we can start blocking
>> WebRTC if connect-src doesn't list it.  Otherwise, the alternative we
>> have is to create a more difficult-to-use mechanism that controls
>> WebRTC separate to `connect-src`, with the accompanying risk that
>> sites forget to set that control and leave the door unlocked, of
>> course.
Received on Wednesday, 17 January 2018 08:54:13 UTC

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