** Description changed: [Rationale] For backporting snapd to 14.04 LTS, we need to provide proper AppArmor confinement for snaps when running under the 16.04 hardware enablement kernel. The apparmor userspace package in 14.04 is missing support key mediation features such as UNIX domain socket rules, AppArmor policy namespaces, and AppArmor profile stacking. UNIX domain socket mediation is needed by nearly all snaps. AppArmor policy namespaces and profile stacking are needed by the lxd snap. Unfortunately, it was not feasible to backport the individual features to the 14.04 apparmor package as they're quite complex and have a large number of dependency patches. Additionally, the AppArmor policy abstractions from Ubuntu 16.04 are needed to provide proper snap confinement. Because of these two reasons, the decision to bring 16.04's apparmor package to 14.04 was (very carefully) made. [Test Case] - https://wiki.ubuntu.com/Process/Merges/TestPlans/AppArmor + https://wiki.ubuntu.com/Process/Merges/TestPlans/AppArmor This update will go through the Test Plan as well as manual testing to verify that snap confinement on 14.04 does work. Manual tests include installing snapd in 14.04 and running simple snaps such as pwgen-tyhicks and hello-world, as well as a much more complex snap such as lxd. - [Regression Potential] - High. We must be extremely careful to not regress existing, confined applications in Ubuntu 14.04. We are lucky that the upstream AppArmor project has extensive regression tests and that the Ubuntu Security team adds even more testing via the AppArmor Test Plan. - - Care was taken to minimally change how the AppArmor policies are loaded - during the boot process. I also verified that the abstractions shipped - in apparmor and the profiles shipped in apparmor-profiles are the same - across this SRU update. Additionally, I've ran the following regression - tests from lp:qa-regression-testing (these packages ship an AppArmor - profile): + The following regression tests from lp:qa-regression-testing (these + packages ship an AppArmor profile) can be used to verify that their + respective packages do not regress: test-apache2-mpm-event.py test-apache2-mpm-itk.py test-apache2-mpm-perchild.py test-apache2-mpm-prefork.py test-apache2-mpm-worker.py test-bind9.py test-clamav.py test-cups.py test-dhcp.py test-mysql.py test-ntp.py test-openldap.py test-rsyslog.py test-squid.py test-tcpdump.py + + Additionally, manually testing evince, which is confined by an AppArmor + profile, should be done. + + [Regression Potential] + High. We must be extremely careful to not regress existing, confined applications in Ubuntu 14.04. We are lucky that the upstream AppArmor project has extensive regression tests and that the Ubuntu Security team adds even more testing via the AppArmor Test Plan. + + Care was taken to minimally change how the AppArmor policies are loaded + during the boot process. I also verified that the abstractions shipped + in apparmor and the profiles shipped in apparmor-profiles are the same + across this SRU update.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1641243 Title: Provide full AppArmor confinement for snaps on 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1641243/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
