Re: [OAUTH-WG] Adam Roach's No Objection on draft-ietf-oauth-native-apps-11: (with COMMENT)

Alexey Melnikov <aamelnikov@fastmail.fm> Tue, 23 May 2017 10:09 UTC

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From: Alexey Melnikov <aamelnikov@fastmail.fm>
To: William Denniss <wdenniss@google.com>
Cc: Adam Roach <adam@nostrum.com>, draft-ietf-oauth-native-apps@ietf.org, Hannes Tschofenig <Hannes.Tschofenig@gmx.net>, oauth@ietf.org, The IESG <iesg@ietf.org>, oauth-chairs@ietf.org
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Date: Tue, 23 May 2017 11:09:18 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/oauth/QpE9pTNXw6eVIMwlhTWFGd1PLmo>
Subject: Re: [OAUTH-WG] Adam Roach's No Objection on draft-ietf-oauth-native-apps-11: (with COMMENT)
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On Tue, May 23, 2017, at 10:24 AM, Alexey Melnikov wrote:
> Hi William,
> 
> On 22 May 2017, at 23:14, William Denniss <wdenniss@google.com>; wrote:>>> Section 8.1 makes the statement that "Loopback IP based redirect
>>> URIs may>>>  be susceptible to interception by other apps listening on the same>>>  loopback interface." That's not how TCP listener sockets work:
>>>  for any>>>  given IP address, they guarantee single-process access to a port
>>>  at any>>>  one time. (Exceptions would include processes with root access,
>>>  but an>>>  attacking process with that level of access is going to be
>>>  impossible to>>>  defend against). While mostly harmless, the statement appears to be
>>>  false>>>  on its face, and should be removed or clarified.
>>> 
>> 
>> Will be removed in the next update. Thank you.
> 
> Actually, I disagree with Adam on this, because what he says is OS
> specific. So I think the text is valuable and should stay.> 
In particular, I think SO_REUSEADDR socket option is widely implemented,
both on Windows and Linux.