Re: [secdir] sec-dir review of draft-ietf-sieve-autoreply-02

Barry Leiba <barryleiba@computer.org> Wed, 01 December 2010 21:07 UTC

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Date: Wed, 1 Dec 2010 16:09:12 -0500
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From: Barry Leiba <barryleiba@computer.org>
To: Derek Atkins <derek@ihtfp.com>
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Cc: robinsgv@gmail.com, Alexey.Melnikov@isode.com, sieve-chairs@tools.ietf.org, iesg@ietf.org, secdir@ietf.org
Subject: Re: [secdir] sec-dir review of draft-ietf-sieve-autoreply-02
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Hi, Derek, and thanks for the review.

> The security considerations section details many potential issues with
> automated responders.  One attack that it does not mention is the
> potential for using the auto-responder as an oracle, in particular if
> the system is using any public key cryptographic methods.  An attacker
> could, theoretically, use the auto-responder to perform timing attacks.

You mean, as a covert channel?

The "probing" paragraph isn't sufficient to cover that as well? (It
doesn't focus on covert channels, but does talk about probing for
presence changes.)

Barry