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Re: [Extra] Secdir last call review of draft-ietf-extra-imap4rev2-24

Alexey Melnikov <alexey.melnikov@isode.com> Sun, 24 January 2021 12:50 UTC

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From: Alexey Melnikov <alexey.melnikov@isode.com>
To: Daniel Migault <daniel.migault@ericsson.com>, secdir@ietf.org
Cc: draft-ietf-extra-imap4rev2.all@ietf.org, extra@ietf.org, last-call@ietf.org
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Date: Sun, 24 Jan 2021 12:50:56 +0000
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Subject: Re: [Extra] Secdir last call review of draft-ietf-extra-imap4rev2-24
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Hi Daniel,

On 19/01/2021 14:52, Daniel Migault via Datatracker wrote:

  [snip]

>     During the TLS negotiation [TLS-1.3][TLS-1.2], the client MUST check
>     its understanding of the server hostname against the server's
>     identity as presented in the server Certificate message, in order to
>     prevent man-in-the-middle attacks.  This procedure is described in
>     [RFC7817].
>
> <mglt>
> I think it would be good to mention DANE as
> well as certificate checks.

This came up before, but at this point there is no document describing 
how to use DANE with email clients (an alternative/update to RFC 7817) 
and I am not aware of any client implementations that use DANE 
experimentally for this.

Best Regards,

Alexey

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