** Changed in: rsyslog (Ubuntu)
Status: Fix Released => In Progress
** Also affects: rsyslog (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: rsyslog (Ubuntu Eoan)
Status: New => Triaged
** Changed in: rsyslog (Ubuntu Eoan)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1827253
Title:
[apparmor] missing 'mr' on binary for usage on containers
Status in rsyslog package in Ubuntu:
In Progress
Status in rsyslog source package in Bionic:
Triaged
Status in rsyslog source package in Disco:
Triaged
Status in rsyslog source package in Eoan:
Triaged
Bug description:
[Impact]
* rsyslog ships with a (Default disable) apparmor profile.
* Security sensitive users are in general encouraged to enable such
profiles but unfortunately due to slightly new behavior of the program
the profile prevents its usage.
* Allow the program to map/read its binary to get this working again
[Test Case]
1) Create a 'eoan' container called rs1 here:
lxc launch ubuntu-daily:e rs1
2) Enter the container
lxc shell rs1
3) Enable apparmor profile
rm /etc/apparmor.d/disable/usr.sbin.rsyslogd
apparmor_parser -r -T -W /etc/apparmor.d/usr.sbin.rsyslogd
systemctl restart rsyslog
4) notice rsyslog failed to start
systemctl status rsyslog
[Regression Potential]
* This is just opening up the apparmor profile a bit. Therefore the only
regression it could cause IMHO is a security issue. But then what it
actually allows is reading (not writing!) its own binary which should
be very safe.
* Thinking further it came to my mind that package updates (independent
to the change) might restart services and that means if there is any
issue e.g. in a local config that worked but now fails (not by this
change but in general) then the upgrade will not cause, but trigger
this. This is a general regression risk for any upload, but in this
case worth to mention as it is about log handling - which if broken -
makes large scale systems hard to debug.
[Other Info]
* n/a
---
Issue description:
Enabling the rsyslog (disabled by default) Apparmor profile causes
rsyslog to fail to start when running *inside a container*.
Steps to reproduce:
1) Create a 'eoan' container called rs1 here:
lxc launch ubuntu-daily:e rs1
2) Enter the container
lxc shell rs1
3) Enable apparmor profile
rm /etc/apparmor.d/disable/usr.sbin.rsyslogd
apparmor_parser -r -T -W /etc/apparmor.d/usr.sbin.rsyslogd
systemctl restart rsyslog
4) notice rsyslog failed to start
systemctl status rsyslog
Workaround:
echo ' /usr/sbin/rsyslogd mr,' >> /etc/apparmor.d/local/usr.sbin.rsyslogd
apparmor_parser -r -T -W /etc/apparmor.d/usr.sbin.rsyslogd
systemctl restart rsyslog
Additional information:
root@rs1:~# uname -a
Linux rs1 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64
x86_64 x86_64 GNU/Linux
root@rs1:~# lsb_release -rd
Description: Ubuntu Eoan EANIMAL (development branch)
Release: 19.10
root@rs1:~# dpkg -l| grep -wE 'apparmor|rsyslog'
ii apparmor 2.13.2-9ubuntu6 amd64 user-space parser utility for
AppArmor
ii rsyslog 8.32.0-1ubuntu7 amd64 reliable system and kernel logging
daemon
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: rsyslog 8.32.0-1ubuntu7
ProcVersionSignature: Ubuntu 4.15.0-48.51-generic 4.15.18
Uname: Linux 4.15.0-48-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
Date: Wed May 1 17:36:29 2019
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: rsyslog
UpgradeStatus: No upgrade log present (probably fresh install)
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