[Bug 1637030] Re: hostnamectl changes hostname without password

[Marc Deslauriers]

systemd ships with a policykit file which allows the system
administrator to set the hostname.

The policykit file is located here:
/usr/share/polkit-1/actions/org.freedesktop.hostname1.policy

and in the systemd source here:
https://github.com/systemd/systemd/blob/master/src/hostname/org.freedesktop.hostname1.policy.in

This behaviour is by design.

Please file a bug with the upstream systemd project if you believe this
should be changed. Thanks.


** Changed in: systemd (Ubuntu)
       Status: New => Won't Fix

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Title:
  hostnamectl changes hostname without password

Status in systemd package in Ubuntu:
  Won't Fix

Bug description:
  Systemd's 'hostnamectl' changes the system hostname (including
  modifying '/etc/hostname') without requesting a password, allowing any
  unprivileged user to change the system host name.

  OS: Xubuntu 16.04.1 x64 and Linux Mint 18 Mate x64
  Version: systemd 229-4ubuntu11 amd64

  I also verified this by performing a fresh unmodified install of
  Xubuntu 16.04.1, and this behaviour of hostnamectl was present on the
  first boot.

  Terminal output:
  phil at Xubuntu-Development:~$ hostname
  Xubuntu-Development
  phil at Xubuntu-Development:~$ cat /etc/hostname
  Xubuntu-Development
  phil at Xubuntu-Development:~$ hostnamectl set-hostname Xubuntu-Whatever
  phil at Xubuntu-Development:~$ hostname
  Xubuntu-Whatever
  phil at Xubuntu-Development:~$ cat /etc/hostname
  Xubuntu-Whatever
  phil at Xubuntu-Development:~$ hostnamectl set-hostname Xubuntu-Development
  phil at Xubuntu-Development:~$ hostname
  Xubuntu-Development
  phil at Xubuntu-Development:~$ cat /etc/hostname
  Xubuntu-Development

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: systemd 229-4ubuntu11
  Uname: Linux 4.8.1-040801-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Thu Oct 27 10:43:20 2016
  InstallationDate: Installed on 2016-08-14 (73 days ago)
  InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  MachineType: Gigabyte Technology Co., Ltd. Z97X-SOC Force
  ProcEnviron:
   LANGUAGE=en_AU:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.1-040801-generic root=UUID=4f82359e-10ef-4946-97b5-293bd9a560a6 ro
  SourcePackage: systemd
  SystemdDelta:
   [EXTENDED]   /lib/systemd/system/remote-fs.target → /etc/systemd/system/remote-fs.target.d/network.conf
   [EXTENDED]   /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf
   [EXTENDED]   /lib/systemd/system/systemd-timesyncd.service → /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf
   
   3 overridden configuration files found.
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/21/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F7
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z97X-SOC Force
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF7:bd04/21/2015:svnGigabyteTechnologyCo.,Ltd.:pnZ97X-SOCForce:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ97X-SOCForce:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: Z97X-SOC Force
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.
  mtime.conffile..etc.systemd.journald.conf: 2016-08-14T12:19:20.627772
  mtime.conffile..etc.systemd.system.conf: 2016-10-03T09:44:26.561968
  mtime.conffile..etc.systemd.timesyncd.conf: 2016-10-03T07:52:10.004280

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