--- Begin Message ---
Hi,
On 11/21/25 11:41, Emmanuel Fusté wrote:
Hi Joe,
Le 20/11/2025 à 19:07, Joe Abley a écrit :
Hi Emmanuel,
On 20 Nov 2025, at 16:53, Emmanuel Fusté <[email protected]> wrote:
With a colleague we found by accident read world records served by
Cloudflare DNS which are breaking the DNS data model: multiple
possible CNAME values for a same record leading to possible
resolver's cache pollution.
As the way to get one value or another is trivial, the way to
control the resolver cached value is trivial too.
We did not find how Cloudflare DNS features and zone content where
used/combined to generate this behavior which is surely unexpected
for the zone operator.
Is there some Cloudflare people here to whom I could provide the
zone/records details to see if it is an expected/assumed behavior or
a subtle corner case bug ?
There are a few of us here. Feel free to ping me off-list!
Joe
Thank you ! Details transmited off-list.
Please keep us informed if this case could cause problems for other
resolver operators as well or is otherwise relevant to them.
Winfried
--- End Message ---
_______________________________________________
dns-operations mailing list
[email protected]
https://lists.dns-oarc.net/mailman/listinfo/dns-operations
