Re: [Trans] DNSSEC also needs CT

Ben Laurie <benl@google.com> Tue, 13 May 2014 15:40 UTC

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Date: Tue, 13 May 2014 16:40:37 +0100
Message-ID: <CABrd9SStajEd9vDB8MrcosFiTYhAtnRMCY8CnOeuhPF16PAAPg@mail.gmail.com>
From: Ben Laurie <benl@google.com>
To: Paul Wouters <paul@nohats.ca>
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Subject: Re: [Trans] DNSSEC also needs CT
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On 13 May 2014 16:33, Paul Wouters <paul@nohats.ca> wrote:
> On Tue, 13 May 2014, Ben Laurie wrote:
>
>> OK, good point: zone cuts need to also be verified.
>>
>>> The other case is injection of a custom DS RRset. How would we tell the
>>> difference between the legitimate zone owner adding a DS record or an
>>> attacker/parent zone owner adding one?
>>
>>
>> The legitimate owner can tell - that's the point, right?
>
>
> How does that help protect a non-owner user of someone's site being
> attacked with a targetted attack? If I don't run victim.com, and I am
> just a visitor of victim.com, but only I am given rogue DNSSEC records,
> how can I tell something is wrong? I would go to the public log and see
> the DS I received is not in there?

Right, exactly.

>
> (I'm late in this discussion, so I wouldn't know how this gets
>  authenticated by the consumer and the victim.com's owner, especially
>  if the parent could do a hostile takeover)
>
> Paul



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