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Re: Embarrassing security bug in systemd

From Michael Biebl <biebl@debian.org>
Newsgroups linux.debian.user
Subject Re: Embarrassing security bug in systemd
Date 2017-12-07 20:30 +0100
Message-ID <uUa1Q-1PI-9@gated-at.bofh.it> (permalink)
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Am 07.12.2017 um 15:37 schrieb Roberto C. Sánchez:
> On Thu, Dec 07, 2017 at 03:03:44AM -0600, Dave Sherohman wrote:
>>
>> I no longer have any non-systemd machines handy to verify this on, but
>> my memory is that I have *always* been able to use halt/poweroff/reboot
>> commands from the console without requiring sudo or entering a password,
>> and I've been using Debian since 2000ish, well before systemd was even a
>> gleam in some programmer's eye.  /sbin/shutdown may have also been
>> freely available at the console, but I don't remember that one clearly,
>> since I didn't use it all that often once I discovered the others.
>>
> I just did a fresh install of wheezy (7.11) with all defaults.  Here is
> what happened:
> 
> testuser@debian:~$ cat /etc/debian_version
> 7.11
> testuser@debian:~$ /sbin/reboot
> reboot: must be superuser.
> testuser@debian:~$ ls -l /sbin/reboot
> lrwxrwxrwx 1 root root 4 Jul 14  2013 /sbin/reboot -> halt
> testuser@debian:~$ ls -l /sbin/halt
> -rwxr-xr-x 1 root root 15184 Jul 14  2013 /sbin/halt
> 
> The situation is basically the same for /sbin/shutdown.

Now try CTRL+ALT+DEL on the console. This will reboot your system.
See /etc/inittab:

# What to do when CTRL-ALT-DEL is pressed.
ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now


Next, try hitting the power button. This will shut down your system.
On systems with acpi support, Debian has been installing acpid +
acpi-support-base in the past. See
/etc/acpi/powerbtn-acpi-support.sh


Next install a display manager, like gdm3 or lightdm. This will allow
you shutdown/reboot the system as well.


Basically, it was a completely inconsistent mess before systemd.
Now you at least have a central place where you can configure your
system behaviour.

Michael


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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Thread

Embarrassing security bug in systemd Urs Thuermann <urs@isnogud.escape.de> - 2017-12-06 23:20 +0100
  Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-06 23:50 +0100
    Re: Embarrassing security bug in systemd Ben Caradoc-Davies <ben@transient.nz> - 2017-12-07 00:40 +0100
      Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-07 03:50 +0100
        Re: Embarrassing security bug in systemd deloptes <deloptes@gmail.com> - 2017-12-07 07:30 +0100
  Re: Embarrassing security bug in systemd Ben Caradoc-Davies <ben@transient.nz> - 2017-12-06 23:50 +0100
    Re: Embarrassing security bug in systemd Dave Sherohman <dave@sherohman.org> - 2017-12-07 10:40 +0100
      Re: Embarrassing security bug in systemd Tixy <tixy@yxit.co.uk> - 2017-12-07 11:30 +0100
        Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-07 11:50 +0100
          Re: Embarrassing security bug in systemd Jimmy Johnson <field.engineer@gmail.com> - 2017-12-09 03:50 +0100
            Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-09 17:50 +0100
              Re: Embarrassing security bug in systemd Jimmy Johnson <field.engineer@gmail.com> - 2017-12-10 10:00 +0100
                Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-10 20:40 +0100
      Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-07 11:40 +0100
      Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-07 16:00 +0100
        Re: Embarrassing security bug in systemd Michael Biebl <biebl@debian.org> - 2017-12-07 20:30 +0100
          Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-08 09:20 +0100
          Re: Embarrassing security bug in systemd deloptes <deloptes@gmail.com> - 2017-12-08 12:40 +0100
            Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-08 13:40 +0100
              Re: Embarrassing security bug in systemd deloptes <deloptes@gmail.com> - 2017-12-08 21:40 +0100
            Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-08 17:10 +0100
              Re: Embarrassing security bug in systemd Curt <curty@free.fr> - 2017-12-08 19:10 +0100
              Re: Embarrassing security bug in systemd Menelaos Maglis <mmaglis@metacom.gr> - 2017-12-08 19:40 +0100
              Re: Embarrassing security bug in systemd Menelaos Maglis <mmaglis@metacom.gr> - 2017-12-08 19:50 +0100
                Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-08 20:50 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-08 21:20 +0100
                Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-09 09:10 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-09 11:20 +0100
                Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-09 19:40 +0100
                Re: Embarrassing security bug in systemd Dejan Jocic <jodejka@gmail.com> - 2017-12-09 20:30 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-09 22:00 +0100
                Re: Embarrassing security bug in systemd Dejan Jocic <jodejka@gmail.com> - 2017-12-10 00:40 +0100
                Re: Embarrassing security bug in systemd Joe <joe@jretrading.com> - 2017-12-10 10:40 +0100
                Re: Embarrassing security bug in systemd Dejan Jocic <jodejka@gmail.com> - 2017-12-10 11:20 +0100
                Re: Embarrassing security bug in systemd Joe <joe@jretrading.com> - 2017-12-10 12:40 +0100
                Re: Embarrassing security bug in systemd Dejan Jocic <jodejka@gmail.com> - 2017-12-10 16:10 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-11 15:10 +0100
                Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-09 21:10 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-09 21:10 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-08 21:50 +0100
                Re: Embarrassing security bug in systemd John Hasler <jhasler@newsguy.com> - 2017-12-08 22:30 +0100
                Re: Embarrassing security bug in systemd Glenn English <ghe2001@gmail.com> - 2017-12-09 02:50 +0100
                Re: Embarrassing security bug in systemd John Hasler <jhasler@newsguy.com> - 2017-12-09 06:50 +0100
                Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-09 09:20 +0100
                Re: Embarrassing security bug in systemd Jonathan Dowland <jmtd@debian.org> - 2017-12-09 09:10 +0100
                Re: Embarrassing security bug in systemd Christian Seiler <christian@iwakd.de> - 2017-12-15 13:30 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-15 14:10 +0100
                Re: Embarrassing security bug in systemd John Hasler <jhasler@newsguy.com> - 2017-12-15 16:00 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-08 21:50 +0100
                Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-08 22:40 +0100
                Re: Embarrassing security bug in systemd John Hasler <jhasler@newsguy.com> - 2017-12-09 00:30 +0100
                Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-09 10:00 +0100
        Re: Embarrassing security bug in systemd Dave Sherohman <dave@sherohman.org> - 2017-12-08 10:00 +0100
      Re: Embarrassing security bug in systemd Cindy-Sue Causey <butterflybytes@gmail.com> - 2017-12-08 23:40 +0100
        Re: Embarrassing security bug in systemd Joe <joe@jretrading.com> - 2017-12-09 00:30 +0100
          Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-09 01:20 +0100
            Re: Embarrassing security bug in systemd Joe <joe@jretrading.com> - 2017-12-09 11:40 +0100
              Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-09 15:30 +0100
                Re: Embarrassing security bug in systemd The Wanderer <wanderer@fastmail.fm> - 2017-12-10 01:00 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-10 22:20 +0100
              Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-09 17:50 +0100
                Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-09 18:20 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-09 21:20 +0100
                Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-10 12:00 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-10 17:10 +0100
                Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-10 20:40 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-10 21:30 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-10 23:10 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-11 00:10 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-11 00:50 +0100
                Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-11 12:30 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-11 13:40 +0100
                Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-11 14:40 +0100
                Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-10 21:50 +0100
                Re: Embarrassing security bug in systemd Eduardo M KALINOWSKI <eduardo@kalinowski.com.br> - 2017-12-11 13:00 +0100
                Re: Embarrassing security bug in systemd <tomas@tuxteam.de> - 2017-12-11 13:40 +0100
                Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-11 16:30 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-10 23:10 +0100
                Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-11 01:30 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-11 04:40 +0100
                Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-11 06:10 +0100
                Re: Embarrassing security bug in systemd Gene Heskett <gheskett@shentel.net> - 2017-12-11 07:40 +0100
                Rust? (and a wordsmithing question) (was: Re: Embarrassing security bug in systemd) rhkramer@gmail.com - 2017-12-11 15:40 +0100
                Re: Rust? (and a wordsmithing question) (was: Re: Embarrassing  security bug in systemd) Darac Marjal <mailinglist@darac.org.uk> - 2017-12-11 16:00 +0100
                Re: Rust? (and a wordsmithing question) (was: Re: Embarrassing security bug in systemd) rhkramer@gmail.com - 2017-12-11 18:30 +0100
                Re: Rust? (and a wordsmithing question) (was: Re: Embarrassing  security bug in systemd) Joe <joe@jretrading.com> - 2017-12-11 16:30 +0100
                Re: Rust? (and a wordsmithing question) "James H. H. Lampert" <jamesl@touchtonecorp.com> - 2017-12-11 17:40 +0100
                Re: Rust? (and a wordsmithing question) David Wright <deblis@lionunicorn.co.uk> - 2017-12-11 20:10 +0100
                Re: Rust? (and a wordsmithing question) <tomas@tuxteam.de> - 2017-12-12 09:30 +0100
                Re: Rust? (and a wordsmithing question) "James H. H. Lampert" <jamesl@touchtonecorp.com> - 2017-12-12 17:30 +0100
                Re: Rust? (and a wordsmithing question) <tomas@tuxteam.de> - 2017-12-12 17:50 +0100
                Re: Rust? (and a wordsmithing question) Curt <curty@free.fr> - 2017-12-12 18:20 +0100
                Re: Rust? (and a wordsmithing question) Richard Hector <richard@walnut.gen.nz> - 2017-12-13 04:40 +0100
                Re: Rust? (and a wordsmithing question) (was: Re: Embarrassing security bug in systemd) rhkramer@gmail.com - 2017-12-11 18:30 +0100
                Re: Rust? (and a wordsmithing question) (was: Re: Embarrassing  security bug in systemd) David Wright <deblis@lionunicorn.co.uk> - 2017-12-12 19:10 +0100
                UID 1000 on Raspberry Pi (Was: Re: Embarrassing security bug in  systemd) Jason <electron@emypeople.net> - 2018-01-09 05:10 +0100
                Re: UID 1000 on Raspberry Pi (Was: Re: Embarrassing security bug in  systemd) Christian Groessler <chris@groessler.org> - 2018-01-09 16:00 +0100
                Re: UID 1000 on Raspberry Pi (Was: Re: Embarrassing security bug in  systemd) Roberto C. Sánchez <roberto@debian.org> - 2018-01-09 16:30 +0100
                Re: UID 1000 on Raspberry Pi (Was: Re: Embarrassing security bug in  systemd) Christian Groessler <chris@groessler.org> - 2018-01-09 18:10 +0100
                Re: UID 1000 on Raspberry Pi (Was: Re: Embarrassing security bug in  systemd) Erik Christiansen <dvalin@internode.on.net> - 2018-01-10 04:50 +0100
          Re: Embarrassing security bug in systemd Menelaos Maglis <mmaglis@metacom.gr> - 2017-12-09 01:40 +0100
            Re: Embarrassing security bug in systemd Mark Fletcher <mark27q1@gmail.com> - 2017-12-09 03:10 +0100
              Re: Embarrassing security bug in systemd Joe <joe@jretrading.com> - 2017-12-09 10:50 +0100
        Re: Embarrassing security bug in systemd Ric Moore <wayward4now@gmail.com> - 2017-12-09 16:40 +0100
          Re: Embarrassing security bug in systemd Tom Furie <tom@furie.org.uk> - 2017-12-09 17:10 +0100
            Re: Embarrassing security bug in systemd Ben Caradoc-Davies <ben@transient.nz> - 2017-12-09 22:10 +0100
          Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-09 18:20 +0100
  Re: Embarrassing security bug in systemd Michael Stone <mstone@debian.org> - 2017-12-07 00:00 +0100
    Re: Embarrassing security bug in systemd Joe <joe@jretrading.com> - 2017-12-07 09:40 +0100
  Re: Embarrassing security bug in systemd Glenn English <ghe2001@gmail.com> - 2017-12-07 00:10 +0100
  Re: Embarrassing security bug in systemd Brian <ad44@cityscape.co.uk> - 2017-12-07 00:10 +0100
    Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-07 03:50 +0100
  Re: Embarrassing security bug in systemd Michael Lange <klappnase@freenet.de> - 2017-12-07 00:20 +0100
    Re: Embarrassing security bug in systemd "James H. H. Lampert" <jamesl@touchtonecorp.com> - 2017-12-07 00:50 +0100
      Re: Embarrassing security bug in systemd Michael Stone <mstone@debian.org> - 2017-12-07 01:20 +0100
        Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-07 03:50 +0100
      Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-07 02:10 +0100
        Re: Embarrassing security bug in systemd Nicholas Geovanis <nickgeovanis@gmail.com> - 2017-12-07 03:40 +0100
          Re: Embarrassing security bug in systemd Eric S Fraga <e.fraga@ucl.ac.uk> - 2017-12-07 08:30 +0100
    Re: Embarrassing security bug in systemd Michael Biebl <biebl@debian.org> - 2017-12-07 00:50 +0100
      Re: Embarrassing security bug in systemd Dejan Jocic <jodejka@gmail.com> - 2017-12-07 02:40 +0100
      Re: Embarrassing security bug in systemd Menelaos Maglis <mmaglis@metacom.gr> - 2017-12-08 10:40 +0100
        Re: Embarrassing security bug in systemd Roberto C. Sánchez <roberto@debian.org> - 2017-12-08 13:40 +0100
          Re: Embarrassing security bug in systemd deloptes <deloptes@gmail.com> - 2017-12-08 20:10 +0100
  Re: Embarrassing security bug in systemd David Wright <deblis@lionunicorn.co.uk> - 2017-12-07 01:10 +0100
  Re: Embarrassing security bug in systemd Eric S Fraga <e.fraga@ucl.ac.uk> - 2017-12-07 08:30 +0100
  Re: Embarrassing security bug in systemd David Baron <dbaron770@gmail.com> - 2017-12-07 08:50 +0100

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