AppArmor Profiles on Ubuntu

The AppArmor package is installed on Ubuntu by default and all default profiles are loaded at the time of system start up. The profiles contain the list of access control rules which are stored in etc/apparmor. d/. You can also protect any installed application by creating a AppArmor profile of that application.

1. Does Ubuntu have AppArmor?
2. Where are AppArmor profiles stored?
3. How do I run AppArmor on Ubuntu?
4. How do I make an AppArmor profile?
5. What is AppArmor on Ubuntu?
6. What does AppArmor do in Linux?
7. Is AppArmor installed by default?
8. What are AppArmor profiles?
9. How do I debug AppArmor?
10. Should I disable AppArmor?
11. What is AppArmor policy?
12. What is AppArmor enforce mode?

Does Ubuntu have AppArmor?

AppArmor is an important security feature that's been included by default with Ubuntu since Ubuntu 7.10. However, it runs silently in the background, so you may not be aware of what it is and what it's doing.

Where are AppArmor profiles stored?

Where is AppArmor Policy Stored? AppArmor system profile files and related files are traditionally stored in the directory /etc/apparmor.

How do I run AppArmor on Ubuntu?

sudo invoke-rc. d apparmor start sudo update-rc. d apparmor start 37 S .
...
Enable AppArmor framework

1. ensure AppArmor is not disabled in /etc/default/grub if using Ubuntu kernels, or if using non-Ubuntu kernels, that /etc/default/grub has apparmor=1 security=apparmor.
2. ensuring that the apparmor package is installed.

How do I make an AppArmor profile?

Build an AppArmor profile for a group of applications as follows:

1. Create profiles for the individual programs that make up your application. ...
2. Put relevant profiles into learning or complain mode. ...
3. Exercise your application. ...
4. Analyze the log. ...
5. Repeat Step 3 and Step 4. ...
6. Edit the profiles. ...
7. Return to enforce mode.

What is AppArmor on Ubuntu?

Introduction. AppArmor is a Mandatory Access Control (MAC) system which is a kernel (LSM) enhancement to confine programs to a limited set of resources. ... AppArmor is an established technology first seen in Immunix and later integrated into Ubuntu, Novell/SUSE, and Mandriva.

What does AppArmor do in Linux?

AppArmor ("Application Armor") is a Linux kernel security module that allows the system administrator to restrict programs' capabilities with per-program profiles. Profiles can allow capabilities like network access, raw socket access, and the permission to read, write, or execute files on matching paths.

Is AppArmor installed by default?

The AppArmor package is installed on Ubuntu by default and all default profiles are loaded at the time of system start up. The profiles contain the list of access control rules which are stored in etc/apparmor.

What are AppArmor profiles?

AppArmor profiles are stored in /etc/apparmor.d/ and they contain a list of access control rules on resources that each program can make use of. The profiles are compiled and loaded into the kernel by the apparmor_parser command. Each profile can be loaded either in enforcing or complaining mode.

How do I debug AppArmor?

Debugging procedure

1. To debug an apparmor profile, look in /var/log/kern.log for 'audit' entries. ...
2. where '/path/to/bin' is the absolute path to the binary, as reported in the 'profile=...' ...
3. To re-enable enforcing mode, use 'aa-enforce' instead: sudo aa-enforce /path/to/bin.

Should I disable AppArmor?

AppArmor has the ability to disable specific profiles rather than simply turning it on or off, yet I've seen people in IRC and forums advise others to disable AppArmor completely. This is totally misguided and YOU SHOULD NEVER DISABLE APPARMOR ENTIRELY to work around a profiling problem.

What is AppArmor policy?

Overview. AppArmor is a Mandatory Access Control (MAC) system which confines programs to a limited set of resources. AppArmor confinement is provided via profiles loaded into the kernel. AppArmor can be set to either enforce the profile or complain when profile rules are violated.

What is AppArmor enforce mode?

AppArmor is a Mandatory Access Control or MAC system. ... Enforce – In the enforce mode, system begins enforcing the rules and report the violation attempts in syslog or auditd (only if auditd is installed) and operation will not be permitted. Complain – In the complain mode, system doesn't enforce any rules.