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Re: [Masque] Fleshing out the MASQUE Protocol

Lucas Pardue <lucaspardue.24.7@gmail.com> Mon, 16 March 2020 19:42 UTC

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From: Lucas Pardue <lucaspardue.24.7@gmail.com>
Date: Mon, 16 Mar 2020 19:42:09 +0000
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To: David Schinazi <dschinazi.ietf@gmail.com>
Cc: MASQUE <masque@ietf.org>
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Subject: Re: [Masque] Fleshing out the MASQUE Protocol
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On Mon, Mar 16, 2020 at 7:26 PM David Schinazi <dschinazi.ietf@gmail.com>
wrote:

> My expectation is that MASQUE needs to know about the connection context
> and is not bound by the Fetch spec - in other words, MASQUE is a client
> application in its own right that can't be implemented in Web-based
> JavaScript for example. Regarding the vulnerability you describe, I think
> we'll want to mention this in security considerations and recommend that
> implementors have proxying disabled by default unless explicitly enabled by
> the server administrator?
>

I think that makes sense. If JS-based MASQUE is out of scope, then perhaps
we should also consider preventative techniques on the client side such as
requiring a "Sec" prefixed header such as those used by WebSockets [1].

A more drastic change would be to switch away from POST to something like
extended CONNECT.

Lucas

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