[Pkg-xfce-devel] Bug#781080: lightdm: allows login as root by default

Andreas Glaeser bugs.andreas.glaeser at freenet.de
Tue Mar 24 08:40:21 UTC 2015

Hash: SHA1

Package: lightdm
Version: 1.10.3-3
Severity: normal

Dear Maintainer,

until today I had not even tried this, when I typed 'root' and the password into the
lightdm-mask instead of into VT-4-login.

I was quite surprised, that lightdm allows root-login, I also did not find, where to
switch this off in the text-configuration.

I have tried some things about X-login, but a root-session from lightdm is clearly not
what I wanted.

In my opinion this is *INSECURE*, if I need graphical root-access, then I start thunar
for instance from the terminal, saying 'sudo thunar', but having a completely
root-Xsession is most probably not recommended at all.

Please revert this to normal and add a configuration-option to enable it, if hackers need
the it in order to test X-security.  

Maybe this is related to systemd.

- -- System Information:
Debian Release: 8.0
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.7-ckt7edtp (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages lightdm depends on:
ii  adduser                                3.113+nmu3
ii  consolekit                             0.4.6-5
ii  dbus                                   1.8.16-1
ii  debconf [debconf-2.0]                  1.5.56
ii  libc6                                  2.19-15
ii  libgcrypt20                            1.6.2-4+b1
ii  libglib2.0-0                           2.42.1-1
ii  libpam-systemd                         215-12
ii  libpam0g                               1.1.8-3.1
ii  libxcb1                                1.10-3+b1
ii  libxdmcp6                              1:1.1.1-1+b1
ii  lightdm-gtk-greeter [lightdm-greeter]  1.8.5-2

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+7

Versions of packages lightdm suggests:
ii  accountsservice  0.6.37-3+b1
ii  upower           0.99.1-3.1

- -- debconf information:
* shared/default-x-display-manager: lightdm
  lightdm/daemon_name: /usr/sbin/lightdm
Version: GnuPG v2


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