[Bug 2042866] [NEW] Warning: Permissions for /etc/netplan/01-use-network-manager.yaml are too open. Netplan configuration should NOT be accessible by others.

[fprietog]

Public bug reported:

This warning is shown in the system journal (during boot):

nov 06 17:15:23 fpgrpi generate[840]: Permissions for
/etc/netplan/01-use-network-manager.yaml are too open. Netplan
configuration should NOT be accessible by others.

The file /etc/netplan/01-use-network-manager.yaml came from the package
ubuntu-raspi-settings-desktop and its post install permissions are -rw-r
--r-- (group and others readable).

A simple workaround is to remove the file read permission for group and
others, as suggested, using this command:

sudo chmod 600 /etc/netplan/01-use-network-manager.yaml


Additional info:
----------------
OS: Ubuntu 23.10 aarch64 (Mantic)
Host: Raspberry Pi 4 Model B Rev 1.4 
Kernel: 6.5.0-1006-raspi 

# lsb_release -r
No LSB modules are available.
Release:	23.10

# apt-cache policy ubuntu-raspi-settings-desktop
ubuntu-raspi-settings-desktop:
  Instalados: 23.10.6
  Candidato:  23.10.6
  Tabla de versión:
 *** 23.10.6 500
        500 http://ports.ubuntu.com/ubuntu-ports mantic/main arm64 Packages
        100 /var/lib/dpkg/status

** Affects: ubuntu-raspi-settings (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: ubuntu-settings (Ubuntu) => ubuntu-raspi-settings
(Ubuntu)

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https://bugs.launchpad.net/bugs/2042866

Title:
  Warning: Permissions for /etc/netplan/01-use-network-manager.yaml are
  too open. Netplan configuration should NOT be accessible by others.

Status in ubuntu-raspi-settings package in Ubuntu:
  New

Bug description:
  This warning is shown in the system journal (during boot):

  nov 06 17:15:23 fpgrpi generate[840]: Permissions for
  /etc/netplan/01-use-network-manager.yaml are too open. Netplan
  configuration should NOT be accessible by others.

  The file /etc/netplan/01-use-network-manager.yaml came from the
  package ubuntu-raspi-settings-desktop and its post install permissions
  are -rw-r--r-- (group and others readable).

  A simple workaround is to remove the file read permission for group
  and others, as suggested, using this command:

  sudo chmod 600 /etc/netplan/01-use-network-manager.yaml

  
  Additional info:
  ----------------
  OS: Ubuntu 23.10 aarch64 (Mantic)
  Host: Raspberry Pi 4 Model B Rev 1.4 
  Kernel: 6.5.0-1006-raspi 

  # lsb_release -r
  No LSB modules are available.
  Release:	23.10

  # apt-cache policy ubuntu-raspi-settings-desktop
  ubuntu-raspi-settings-desktop:
    Instalados: 23.10.6
    Candidato:  23.10.6
    Tabla de versión:
   *** 23.10.6 500
          500 http://ports.ubuntu.com/ubuntu-ports mantic/main arm64 Packages
          100 /var/lib/dpkg/status

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