Firejail

Firejail is a SUID sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces, seccomp-bpf and Linux capabilities. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table. Firejail can work in a SELinux or AppArmor environment, and it is integrated with Linux Control Groups.

Written in C with virtually no dependencies, the software runs on any Linux computer with a 3.x kernel version or newer. It can sandbox any type of processes: servers, graphical applications, and even user login sessions. The software includes sandbox profiles for a number of more common Linux programs, such as Mozilla Firefox, Chromium, VLC, Transmission etc.

The sandbox is lightweight, the overhead is low. There are no complicated configuration files to edit, no socket connections open, no daemons running in the background. All security features are implemented directly in Linux kernel and available on any Linux computer.

Firejail Intro	Firejail Demo	Debian Install
Arch Linux Install	Disable Network Access

Project webpage: https://firejail.wordpress.com/

Download and Installation: https://firejail.wordpress.com/download-2/

Features: https://firejail.wordpress.com/features-3/

Documentation: https://firejail.wordpress.com/documentation-2/

FAQ: https://github.com/netblue30/firejail/wiki/Frequently-Asked-Questions

Wiki: https://github.com/netblue30/firejail/wiki

Travis-CI status: https://travis-ci.org/netblue30/firejail

GitLab-CI status: https://gitlab.com/Firejail/firejail_ci/pipelines/

Security vulnerabilities

We take security bugs very seriously. If you believe you have found one, please report it by emailing us at netblue30@protonmail.com

Installing

Try installing Firejail from your system packages first. Firejail is included in Alpine, ALT Linux, Arch, Chakra, Debian, Deepin, Devuan, Fedora, Gentoo, Manjaro, Mint, NixOS, Parabola, Parrot, PCLinuxOS, ROSA, Solus, Slackware/SlackBuilds, Trisquel, Ubuntu, Void and possibly others.

The firejail 0.9.52-LTS version is deprecated. On Ubuntu 18.04 LTS users are advised to use the PPA. On Debian buster we recommend to use the backports package.

You can also install one of the released packages, or clone Firejail’s source code from our Git repository and compile manually:

$ git clone https://github.com/netblue30/firejail.git
$ cd firejail
$ ./configure && make && sudo make install-strip

On Debian/Ubuntu you will need to install git and gcc compiler. AppArmor development libraries and pkg-config are required when using --apparmor ./configure option:

$ sudo apt-get install git build-essential libapparmor-dev pkg-config gawk

For --selinux option, add libselinux1-dev (libselinux-devel for Fedora).

Detailed information on using firejail from git is available on the wiki.

Running the sandbox

To start the sandbox, prefix your command with “firejail”:

$ firejail firefox            # starting Mozilla Firefox
$ firejail transmission-gtk   # starting Transmission BitTorrent
$ firejail vlc                # starting VideoLAN Client
$ sudo firejail /etc/init.d/nginx start

Run "firejail --list" in a terminal to list all active sandboxes. Example:

$ firejail --list
1617:netblue:/usr/bin/firejail /usr/bin/firefox-esr
7719:netblue:/usr/bin/firejail /usr/bin/transmission-qt
7779:netblue:/usr/bin/firejail /usr/bin/galculator
7874:netblue:/usr/bin/firejail /usr/bin/vlc --started-from-file file:///home/netblue/firejail-whitelist.mp4
7916:netblue:firejail --list

Desktop integration

Integrate your sandbox into your desktop by running the following two commands:

$ firecfg --fix-sound
$ sudo firecfg

The first command solves some shared memory/PID namespace bugs in PulseAudio software prior to version 9. The second command integrates Firejail into your desktop. You would need to logout and login back to apply PulseAudio changes.

Start your programs the way you are used to: desktop manager menus, file manager, desktop launchers. The integration applies to any program supported by default by Firejail. There are about 250 default applications in current Firejail version, and the number goes up with every new release. We keep the application list in /usr/lib/firejail/firecfg.config file.

Security profiles

Most Firejail command line options can be passed to the sandbox using profile files. You can find the profiles for all supported applications in /etc/firejail directory.

If you keep additional Firejail security profiles in a public repository, please give us a link:

https://github.com/chiraag-nataraj/firejail-profiles
https://github.com/triceratops1/fe

Use this issue to request new profiles: #1139

You can also use this tool to get a list of syscalls needed by a program: contrib/syscalls.sh.

We also keep a list of profile fixes for previous released versions in etc-fixes directory.

Latest released version: 0.9.62

Current development version: 0.9.63

Profile Statistics

A small tool to print profile statistics. Compile as usual and run in /etc/profiles:

$ ./profstats *.profile
Warning: multiple caps in transmission-daemon.profile

Stats:
    profiles            1029
    include local profile   1029   (include profile-name.local)
    include globals     1029   (include globals.local)
    blacklist ~/.ssh        1005   (include disable-common.inc)
    seccomp         975
    capabilities        1028
    noexec          899   (include disable-exec.inc)
    memory-deny-write-execute   220
    apparmor            549
    private-bin         542
    private-dev         897
    private-etc         431
    private-tmp         784
    whitelist home directory    469
    whitelist var       695   (include whitelist-var-common.inc)
    whitelist run/user      334   (include whitelist-runuser-common.inc
                    or blacklist ${RUNUSER})
    whitelist usr/share     354   (include whitelist-usr-share-common.inc
    net none            332
    dbus-user none      523
    dbus-system none        627

New profiles:

gfeeds, firefox-x11, tvbrowser, rtv, clipgrab, gnome-passwordsafe, bibtex, gummi, latex, pdflatex, tex, wpp, wpspdf, wps, et, multimc, gnome-hexgl, com.github.johnfactotum.Foliate, desktopeditors, impressive, mupdf-gl, mupdf-x11, mupdf-x11-curl, muraster, mutool, planmaker18, planmaker18free, presentations18, presentations18free, textmaker18, textmaker18free, teams, xournal, gnome-screenshot, ripperX, sound-juicer, iagno, com.github.dahenson.agenda, gnome-pomodoro, gnome-todo, kmplayer, penguin-command, x2goclient, frogatto, gnome-mines, gnome-nibbles, lightsoff, ts3client_runscript.sh, warmux, ferdi, abiword, four-in-a-row, gnome-mahjongg, gnome-robots, gnome-sudoku, gnome-taquin, gnome-tetravex, blobwars, gravity-beams-and-evaporating-stars, hyperrogue, jumpnbump-menu, jumpnbump, magicor, mindless, mirrormagic, mrrescue, scorched3d-wrapper, scorchwentbonkers, seahorse-adventures, wordwarvi, xbill, gnome-klotski, five-or-more, swell-foop, fdns, jitsi-meet-desktop, nicontine, steam-runtime, apostrophe, quadrapassel, dino-im, strawberry, hitori, bijiben, gnote, gnubik, ZeGrapher, gapplication, xonotic-sdl-wrapper, openarena_ded, cawbird, freetube, homebank, mattermost-desktop, newsflash, com.gitlab.newsflash, element-desktop, sushi, xfce4-screenshooter, org.gnome.NautilusPreviewer, lyx, minitube, nuclear, mtpaint, minecraft-launcher, gnome-calendar, vmware, git-cola, otter-browser, kazam, menulibre, musictube, onboard, fractal, mirage, quaternion, spectral, man, psi, smuxi-frontend-gnome, balsa, kube, trojita, cola, twitch, youtube, youtubemusic-nativefier, ytmdesktop, dbus-send, notify-send, qrencode, xournalpp, chromium-freeworld, equalx