Abstractions

This project and the official apparmor-profiles project provide a large selection of abstractions to be included in profiles. They should always be used as they target wide compatibility across hardware and distributions while only allowing the bare minimum access.

owner @{HOME}/@{XDG_DOWNLOAD_DIR}/{,**} rw,

include <abstractions/user-download-strict>

All of these abstractions can be extended by a system admin by adding rules in a file under /etc/apparmor.d/<name>.d where <name> is the name of one of these abstractions.

Application helper¶

Abstraction that aims at including a complete set of rules for a given program. The calling profile only needs to add rules dependant of its use case/program.

It is mostly useful for program often used in sub profile or for forks based on the same upstream.

app/chromium¶

A full set of rules for all chromium based browsers. It works as a function and requires some variables to be provided as arguments and to be set in the header of the calling profile:

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@{name} = chromium
@{domain} = org.chromium.Chromium
@{lib_dirs} = @{lib}/@{name}
@{config_dirs} = @{user_config_dirs}/@{name}
@{cache_dirs} = @{user_cache_dirs}/@{name}

If your application requires chromium to run use common/chromium or common/electron instead.

app/pgrep¶

app/sudo¶

A minimal set of rules for profiles including internal sudo. Interactive sudo needs more rules. It is intended to be used in profiles or sub-profiles that need to elevate their privileges using sudo or su for a very specific action:

  @{bin}/sudo rCx  -> root,

  profile root {
    include <abstractions/base>
    include <abstractions/app/sudo>

    include if exists <local/<profile_name>_root>
  }

app/systemctl¶

An alternative solution for child-systemctl, when the child profile provides too much/not enough access. This abstraction should be used by a sub profile as follows:

  @{bin}/systemctl  rCx ->  systemctl,

  profile systemctl {
    include <abstractions/base>
    include <abstractions/app/systemctl>

    include if exists <local/<profile_name>_systemctl>
  }

Common Dependencies¶

On the contrary of abstractions/app/, abstractions in this directory are expected to provide a minimal set of rules to make a program using a dependency work.

common/app¶

Common rules for unknown userland UI applications that are sandboxed using bwrap.

common/apt¶

Minimal access to apt sources, preferences, and configuration.

common/bwrap¶

Minimal set of rules for sandboxed programs using bwrap. A profile using this abstraction still needs to set:

• The flag: attach_disconnected
• Bwrap execution: @{bin}/bwrap rix,

common/chromium¶

A minimal set of rules for chromium based application. Handle access for internal sandbox.

common/electron¶

A minimal set of rules for all electron based UI applications. It works as a function and requires some variables to be provided as arguments and set in the header of the calling profile:

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@{name} = spotify
@{lib_dirs} = /opt/@{name}
@{config_dirs} = @{user_config_dirs}/@{name}
@{cache_dirs} = @{user_cache_dirs}/@{name}

common/systemd¶

Common set of rules for internal systemd suite.

Audio¶

audio-client¶

Most programs do not need access to audio devices, audio-client only includes configuration files to be used by client applications.

audio-server¶

Provides access to audio devices. It should only be used by audio servers that need direct access to them.

Dbus¶

See the Dbus page.

User files¶

user-read¶

This abstraction gives read access on all defined user directories. It should only be used if access to ALL folders under xdg directories is required.

user-download-strict¶

Provides write access to all user download directories

deny-sensitive-home¶

Denies access to some sensitive directories under /home/. It is intended to be used by the few profiles that legitimately require full unrestricted access over all user directories (file managers and search engines). It allows to us to block access to really sensitive data to such profiles.

dconf-write¶

Permissions for querying dconf settings with write access.

Shell¶

Only use shells, other abstractions are software dependant and should not usually be used directly.

shells¶

Common rules for interactive shells.

bash-strict¶

Common rules for interactive shell using bash.

zsh¶

Common rules for interactive shell using zsh.

System¶

nameservice-strict¶

Many programs wish to perform nameservice like operations, such as looking up users by name or ID, groups by name or ID, hosts by name or IP, etc.

Use this abstraction instead of upstream abstractions/nameservice as upstream abstraction also provide full network access which is not needed for a lot of programs.

app-open¶

Instead of allowing the run of all software under @{bin} or @{lib} the purpose of this abstraction is to list all GUI program that can open resources. Ultimately, only sandbox manager program such as bwrap, snap, flatpak, firejail should be present here. Until this day, this profile will be a controlled mess.

Devices¶

devices-usb¶

Provides access to USB devices

disks-write¶

Provides read write access to disks devices

disks-read¶

Provides read-only access to disks devices

Desktop Environment¶

desktop¶

Unified minimal abstraction for all UI applications regardless of the desktop environment. When supported in apparmor, the condition will be used in this abstraction to filter resources specific for supported DE.

It is safe to use this in GUI applications as well as minimal desktop resource files, it includes access to configuration for: fonts, gtk & qt, wayland & xorg.

gnome-strict¶

Same as abstractions/desktop but limited to gnome.

kde-strict¶

Same as abstractions/desktop but limited to KDE.

Graphics¶

Use either graphics or graphics-full. The other abstractions are hardware/software dependent and should not usually be used directly.

graphics¶

Unified abstraction for GPU access regardless of the hardware used.

Replace and highly restrict <abstractions/opencl>

graphics-full¶

Identical to graphics with more direct access to nvidia GPU devices.

dri¶

Linux's graphics stack which allows unprivileged user-space programs to issue commands to graphics hardware without conflicting with other programs. Mostly used by Intel (integrated or not) and AMD GPUs.

Modernized equivalent of both dri-common and dri-enumerate

nvidia-strict¶

Modernized equivalent of abstractions/nvidia

vulkan-strict¶

Modernized equivalent of abstractions/vulkan