I was reminded that libnss-resolve is in 'standard' now, which means
it's also installed by default on server and any bugs that affect only
the stub DNS resolver without affecting the dbus service - such as this
one - do not impact DNS resolution by default on server in 16.10.
(I was wondering why no one had reported it before now.)
So, I'm downgrading this from critical to high since it only hits users
of 16.10 server in a few corner cases (i.e. containers, chroots without
libnss-resolve installed). It should still be SRUed.
** Changed in: systemd (Ubuntu Yakkety)
Importance: Critical => High
** Changed in: network-manager (Ubuntu Yakkety)
Status: New => Invalid
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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
Status in network-manager source package in Yakkety:
Invalid
Status in systemd source package in Yakkety:
Triaged
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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