Bug#1053482: systemd-resolved: resolved can intermittingly fail AF_UNSPEC queries to CNAMEd domains

[Benjamin Peterson]

On Thu, Oct 5, 2023, at 07:36, Michael Biebl wrote:
> Am 05.10.23 um 02:18 schrieb benjamin at locrian.net:
>> Package: systemd-resolved
>> Version: 252.12-1~deb12u1
>> Severity: important
>> 
>> Dear Maintainer,
>> 
>> When systemd-resolved simultaneously does A and AAAA queries, it fails if one of the queries returns a CNAME with a zero ttl and the other query returns a CNAME with a nonzero ttl. This happens in practice with several DNS providers. A fix for the problem was recently merged upstream at https://github.com/systemd/systemd/commit/8ec951e8d5cdd3ad632b1cbd8bcbe21d68b17512. See that commit for further details about the issue.
>> 
>> Please consider backporting this fix to bookworm.
>
> Please ask for a backport to the v252-stable branch upstream.

Thanks for the reply. I've now submitted https://github.com/systemd/systemd-stable/issues/336