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Re: [DNSOP] [Ext] About key tags

Paul Wouters <paul@nohats.ca> Thu, 29 February 2024 22:07 UTC

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From: Paul Wouters <paul@nohats.ca>
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Date: Thu, 29 Feb 2024 17:06:51 -0500
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References: <4F386814-7ED3-47D3-81C1-1E575FD3C686@icann.org>
Cc: Shumon Huque <shuque@gmail.com>, John Levine <johnl@taugh.com>, dnsop@ietf.org
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To: Edward Lewis <edward.lewis@icann.org>
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Subject: Re: [DNSOP] [Ext] About key tags
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> On Feb 29, 2024, at 07:52, Edward Lewis <edward.lewis@icann.org> wrote:

>  (If no action is taken, malicious activity might follow now that it is described, but I have not heard of a historical case of it.) 

This attack was more or less described five year ago: https://essay.utwente.nl/78777/

They didn’t get to the same amplification levels but if attackers had been interested, they could have picked it up as a tool to improve. scripts to run were attached to the paper.

But also, a resolver that sees a higher than normal load could temporarily take certain actions like sacrificing zones with key tag collisions. It doesn’t mean it ALWAYS has to do it.

Paul

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