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chrysn committed Sep 26, 2024
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12 changes: 6 additions & 6 deletions draft-ietf-core-dns-over-coap.md
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Expand Up @@ -496,6 +496,12 @@ Last update of this information:
Security Considerations
=======================

General CoAP security considerations apply.
Exceeding those in {{Section 11 of RFC7252}},
the request patterns of DoC make it likely that long-lived security contexts are maintained:
{{amp-0rtt}} goes into more detail on what needs to be done
when those are resumed from a new endpoint.

When using unencrypted CoAP (see {{sec:unencrypted-coap}}), setting the ID of a DNS message to 0 as
specified in {{sec:req-caching}} opens the DNS cache of a DoC client to cache poisoning attacks
via response spoofing.
Expand All @@ -507,12 +513,6 @@ harden against injecting spoofed responses.
Consequently, it is of little concern to leverage the benefits of CoAP caching by setting the ID to
0.

General CoAP security considerations apply.
Exceeding those in {{Section 11 of RFC7252}},
the request patterns of DoC make it likely that long-lived security contexts are maintained:
{{amp-0rtt}} goes into more detail on what needs to be done
when those are resumed from a new endpoint.

IANA Considerations
===================

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