Re: [tram] Allow TURN to forward inbound connectivity checks without permission

Simon Perreault <sperreault@jive.com> Tue, 20 March 2018 12:17 UTC

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From: Simon Perreault <sperreault@jive.com>
Date: Tue, 20 Mar 2018 08:17:29 -0400
Message-ID: <CANO7kWD3rpCOrgjcLrkVfh0ZF5nrDs+cRnB02VgMHHW1axSRMg@mail.gmail.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>
Cc: Nils Ohlmeier <nohlmeier@mozilla.com>, Cullen Jennings <fluffy@cisco.com>, Eric Rescorla <ekr@rtfm.com>, "tram@ietf.org" <tram@ietf.org>, Brandon Williams <brandon.williams@akamai.com>
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Subject: Re: [tram] Allow TURN to forward inbound connectivity checks without permission
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2018-03-20 10:31 GMT+00:00 Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com>gt;:

> the TURN client could be subjected to DDoS attack (e.g. spoofed STUN
> packets from attackers, client wastes cycles validating the message
> integrity, and could also be subjected to bandwidth-hogging attack).
>

That would be new to TURN, but not new to the client: NAT pinholes, created
with STUN or otherwise, expose the client similarly. So while this is
certainly worth mentioning in the security considerations section, I don't
see this as a blocker.

I also can't think of a way that this could be exploited to mount any kind
of practical attack against a specific target...

Simon