This bug was fixed in the package systemd - 237-3ubuntu10.33
---------------
systemd (237-3ubuntu10.33) bionic; urgency=medium
*
d/p/lp1852754/0001-network-do-not-re-set-MTU-when-current-and-requested.patch,
d/p/lp1852754/0002-network-call-link_acquire_conf-and-link_enter_join_n.patch,
d/p/lp1852754/0003-network-prohibit-to-set-MTUBytes-and-UseMTU-simultan.patch:
- Complete link setup after setting mtu (LP: #1852754)
systemd (237-3ubuntu10.32) bionic; urgency=medium
[ Victor Tapia ]
* d/p/resolved_disable-connection-downgrade-when-DNSSEC-yes.patch
Fix regression introduced by
resolved-Mitigate-DVE-2018-0001-by-retrying-NXDOMAIN-with.patch when
DNSSEC=yes (LP: #1796501)
[ Dan Streetman ]
*
d/p/fix-typo-lp1668771-resolved-switch-cache-option-to-a-tri-state-option-s.patch:
- Fix typo in previous patch
* d/p/lp1840640-shared-seccomp-add-sync_file_range2.patch:
- allow sync_file_range2 in nspawn container
(LP: #1840640)
* d/p/lp1783994-dissect-Don-t-count-RPMB-and-boot-partitions-8609.patch:
- avoid systemd-gpt-auto-generator failure if mmc dev present
(LP: #1783994)
* d/p/lp1832672-resolved-rework-parsing-of-etc-hosts.patch:
- do not fail entire file on error when parsing /etc/hosts
- parse # char anywhere in line as start of comment
(LP: #1832672)
* d/p/lp1843381-dell_passthrough_skip_rename_retry.patch,
debian/extra/rules/73-usb-net-by-mac.rules:
- fix rename delay for systems using "Dell MAC passthrough"
(LP: #1843381)
* d/p/lp1849733/0001-resolved-longlived-TCP-connections.patch,
d/p/lp1849733/0002-resolved-line-split-dns_stream_new-function-signatur.patch,
d/p/lp1849733/0003-resolved-add-some-assert-s.patch,
d/p/lp1849733/0004-stream-track-type-of-DnsStream-object.patch,
d/p/lp1849733/0005-llmnr-add-comment-why-we-install-no-complete-handler.patch,
d/p/lp1849733/0006-resolved-restart-stream-timeout-whenever-we-managed-.patch,
d/p/lp1849733/0007-resolved-only-call-complete-with-zero-argument-in-LL.patch,
d/p/lp1849733/0008-resolved-add-comment-to-dns_stream_complete-about-it.patch,
d/p/lp1849733/0009-resolved-keep-stub-stream-connections-up-for-as-long.patch,
d/p/lp1849733/0010-resolved-if-we-can-t-append-EDNS-OPT-RR-then-indicat.patch,
d/p/lp1849733/0011-resolved-don-t-let-EDNS0-OPT-dgram-size-affect-TCP.patch,
d/p/lp1849733/0012-resolved-add-new-accessor-dns_stream_take_read_packe.patch,
d/p/lp1849733/0013-resolve-do-not-complete-stream-transaction-when-it-i.patch:
- add TCP pipelining to handle getaddrinfo() fallback to TCP
- ignore EDNS0 payload limit when responding over TCP (LP: #1849733)
* d/p/lp1849658-resolved-set-stream-type-during-DnsStream-creation.patch:
- Fix bug in refcounting TCP stream types (LP: #1849658)
* d/p/lp1850704/0001-networkd-Unify-set-MTU.patch,
d/p/lp1850704/0002-network-drop-redundant-lines.patch:
- Fix setting mtu if interface already up (LP: #1850704)
* d/extra/dhclient-enter-resolved-hook:
- only restart resolved if dhclient conf changed (LP: #1805183)
-- Dan Streetman <ddstr...@canonical.com> Fri, 15 Nov 2019 10:01:16
-0500
** Changed in: systemd (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1832672
Title:
systemd-resolve not ignoring comments in /etc/hosts
Status in systemd:
Unknown
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Bionic:
Fix Released
Bug description:
[impact]
resolved does not ignore comments properly in /etc/hosts
[test case]
see original description below
[regression potential]
as this modifies resolved parsing of /etc/hosts, regressions would
likely be in hostname lookups from hosts in /etc/hosts, or failure(s)
to parse /etc/hosts correctly.
[other info]
original description:
---
$ lsb_release -rd
Description: Ubuntu 18.04.2 LTS
Release: 18.04
$ LANG=C apt-cache policy systemd
systemd:
Installed: 237-3ubuntu10.22
Candidate: 237-3ubuntu10.22
Version table:
*** 237-3ubuntu10.22 500
500 http://ch.archive.ubuntu.com/ubuntu bionic-updates/main amd64
Packages
100 /var/lib/dpkg/status
237-3ubuntu10.19 500
500 http://security.ubuntu.com/ubuntu bionic-security/main amd64
Packages
237-3ubuntu10 500
500 http://ch.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
500 http://mirrors.kernel.org/ubuntu bionic/main amd64 Packages
$ head -1 /etc/hosts
127.0.2.1 foo # bar
$ /usr/bin/systemd-resolve -4 bar
expected
----------
bar: resolve call failed: 'bar' not found
What happened instead
---------------------
bar: 127.0.2.1
HOSTS(5)
> Text from a "#" character until the end of the line is a comment, and is
ignored.
This is fixed in upstream:
https://github.com/systemd/systemd/issues/10779
https://github.com/systemd/systemd/commit/bd0052777981044cf54a1e9d6e3acb1c3d813656
Please backport to current LTS version.
I accidentally connected to wrong systems because of this bug.
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