AppArmor

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Introduction

AppArmor profiles. For better security.

Installation

Introduction

If you are interested, click on Expand on the right.

Proceed at your own risk!
Note: If considering the use of Tor bridges, be aware that AppArmor has caused problems with obfsproxy in the past.

The following steps should be completed in dom0 for both the Whonix-Gateway (commonly called whonix-gw) and the Whonix-Workstation (commonly called whonix-ws) TemplateVMs. It is also important to check AppArmor is active in the TemplateBasedVMs sys-whonix and anon-whonix after making the changes.

Note: After these settings are applied to the TemplateVMs, the TemplateBasedVMs based on the whonix-gw / whonix-ws Whonix templates - namely anon-whonix and sys-whonix - will inherit the AppArmor kernel settings. It is not necessary to recreate the anon-whonix and sys-whonix TemplateBasedVMs to benefit from this change.

Whonix-Gateway

Open a dom0 terminal.

Qubes App Launcher (blue/grey "Q") -> System Tools -> Xfce Terminal

List the current kernel parameters.

[select code]

qvm-prefs -l whonix-gw kernelopts

qvm-prefs -l whonix-gw kernelopts

As of Qubes R3.2, this will show.
nopat

Keep the existing kernel parameters and add 'apparmor=1 security=apparmor'. For example.

[select code]

qvm-prefs -s whonix-gw kernelopts "nopat apparmor=1 security=apparmor"

qvm-prefs -s whonix-gw kernelopts "nopat apparmor=1 security=apparmor"

List the current kernel parameters again (hit the up arrow key twice; you don't have to type the command again).

[select code]

qvm-prefs -l whonix-gw kernelopts

qvm-prefs -l whonix-gw kernelopts

The output should show AppArmor is part of the new kernel parameters. For example.
nopat apparmor=1 security=apparmor

Start the sys-whonix ProxyVM and check AppArmor is now active.

[select code]

sudo aa-status --enabled ; echo $?

sudo aa-status --enabled ; echo $?

The output should show.
0

Whonix-Workstation

Open a dom0 terminal.

Qubes App Launcher (blue/grey "Q") -> System Tools -> Xfce Terminal

List the current kernel parameters.

[select code]

qvm-prefs -l whonix-ws kernelopts

qvm-prefs -l whonix-ws kernelopts

As of Qubes R3.2, this will show.
nopat

Keep the existing kernel parameters and add 'apparmor=1 security=apparmor'. For example.

[select code]

qvm-prefs -s whonix-ws kernelopts "nopat apparmor=1 security=apparmor"

qvm-prefs -s whonix-ws kernelopts "nopat apparmor=1 security=apparmor"

List the current kernel parameters again (hit the up arrow key twice; you don't have to type the command again).

[select code]

qvm-prefs -l whonix-ws kernelopts

qvm-prefs -l whonix-ws kernelopts

The output should show AppArmor is part of the new kernel parameters. For example.
nopat apparmor=1 security=apparmor

Start the anon-whonix AppVM and check AppArmor is now active.

[select code]

sudo aa-status --enabled ; echo $?

sudo aa-status --enabled ; echo $?

The output should show.
0

The profiles packages are available from Whonix's APT repository.

Enable Whonix's testers repository.

[select code]

sudo whonix_repository --enable --repository testers

sudo whonix_repository --enable --repository testers

In Whonix-Workstation as well as on Whonix-Gateway.

Update the package lists.

[select code]

sudo apt-get update

sudo apt-get update

If you want to install all of them

The easiest way to install all of them. You might end up with a few apparmor profiles for software that you have not installed, but then they don't have any effect, so it does not matter.

[select code]

sudo apt-get install apparmor-profiles-whonix

sudo apt-get install apparmor-profiles-whonix

If you only want to install specific ones

Click on expand on the right side.

Profile for Tor Browser (installed by tb-updater [the one that comes installed by default with Whonix]). Useful in Whonix-Workstation.

[select code]

sudo apt-get install apparmor-profile-torbrowser

sudo apt-get install apparmor-profile-torbrowser

Profile for sdwdate. (The network time sync that comes installed with Whonix by default.) Useful for Whonix-Gateway and Whonix-Workstation.

[select code]

sudo apt-get install apparmor-profile-sdwdate

sudo apt-get install apparmor-profile-sdwdate

Profile for the HexChat Chat client. Useful in Whonix-Workstation.

[select code]

sudo apt-get install apparmor-profile-xchat

sudo apt-get install apparmor-profile-xchat

Profile for the Icedove (Mozilla Thunderbird) E-Mail client. Useful in Whonix-Workstation.

[select code]

sudo apt-get install apparmor-profile-icedove

sudo apt-get install apparmor-profile-icedove

Profile for whonixcheck. Useful for Whonix-Gateway and Whonix-Workstation.

[select code]

sudo apt-get install apparmor-profile-whonixcheck

sudo apt-get install apparmor-profile-whonixcheck

Profile for VirtualBox. Useful on the host - we don't have instructions for that yet. Also useful if you run VirtualBox inside VirtualBox.

[select code]

sudo apt-get install apparmor-profile-virtualbox

sudo apt-get install apparmor-profile-virtualbox

Profile Unloading

Only in case you want to disable an apparmor profile.
Click on expand on the right side.

You can view a list of all available profiles here:

[select code]

ls /etc/apparmor.d/

ls /etc/apparmor.d/

Once the profile is loaded in the kernel, to remove it to run.

[select code]

sudo aa-disable /etc/apparmor.d/profile-name

sudo aa-disable /etc/apparmor.d/profile-name

This command expect the profile file to be existing. So when the profile file is deleted (manually or after apt-get purge), the only way I know to unload it is rebooting.

Need to know the names of the profiles, have a look above #If you only want to install specific ones.

More Profiles

Only as additional inspiration. Profiles by other vendors than Whonix. Unsupported by Whonix developers. Don't bother installing an AppArmor profile for applications that you are not going to use anyhow. For example, it is a waste of time to install the dovecot AppArmor profile if you are never going to use dovecot.

• Debian has packages that you can easily install from Debian's apt repository - https://wiki.debian.org/AppArmor/HowToUse#Enable_.2F_install_more_profiles
• Ubuntu also provides profiles. Not so easily downloadable as package to be installed in Debian. The profiles may or may not differ or compleement from the above. http://bazaar.launchpad.net/~apparmor-dev/apparmor-profiles/master/files/head:/ubuntu/16.04/

Support

• Need help? Go to Whonix AppArmor Forum.
• Profile Creation Advice

Development

• Whonix AppArmor Profiles Development Discussion
• Open Tasks

Whonix 14 and above:

https://forums.whonix.org/t/whonix-14-debian-stretch-apparmor-related-changes

[select code]

sudo apt-get update && sudo apt-get install apparmor-notify

sudo apt-get update && sudo apt-get install apparmor-notify

[select code]

kdesudo kwrite /var/log/audit/audit.log

kdesudo kwrite /var/log/audit/audit.log

[select code]

sudo cat /var/log/audit/audit.log | grep DENIED

sudo cat /var/log/audit/audit.log | grep DENIED

[select code]

sudo tail -f /var/log/audit/audit.log | grep --line-buffered DENIED

sudo tail -f /var/log/audit/audit.log | grep --line-buffered DENIED

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