This bug was fixed in the package systemd - 232-17ubuntu1
---------------
systemd (232-17ubuntu1) zesty; urgency=medium
* debian/patches/0001-resolved-follow-CNAMES-for-DNS-stub-
replies.patch: cherry-pick upstream fix for following CNAMEs in DNS
stub replies. Closes LP: #1647031.
-- Steve Langasek <steve.langa...@ubuntu.com> Sun, 12 Feb 2017
22:54:55 -0800
** Changed in: systemd (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1647031
Title:
systemd-resolved’s 127.0.0.53 server does not follow CNAME records
Status in systemd:
New
Status in network-manager package in Ubuntu:
Fix Released
Status in systemd package in Ubuntu:
Fix Released
Bug description:
$ systemd-resolve www.freedesktop.org
www.freedesktop.org: 131.252.210.176
2610:10:20:722:a800:ff:feda:470f
(annarchy.freedesktop.org)
-- Information acquired via protocol DNS in 673.6ms.
-- Data is authenticated: no
$ ping www.freedesktop.org
ping: www.freedesktop.org: Name or service not known
$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.53
$ dig +no{cmd,comments,stats} www.freedesktop.org @127.0.0.53
;www.freedesktop.org. IN A
www.freedesktop.org. 7146 IN CNAME annarchy.freedesktop.org.
$ dig +no{cmd,comments,stats} www.freedesktop.org @8.8.8.8
;www.freedesktop.org. IN A
www.freedesktop.org. 14399 IN CNAME annarchy.freedesktop.org.
annarchy.freedesktop.org. 14399 IN A 131.252.210.176
I trust it needn’t be explained why this makes the internet almost
completely useless in zesty.
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