/etc/apparmor.d/abstractions/lxc/container-base is in liblxc-common 3.0.1-0ubuntu1~18.04.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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capability,
file,
umount,
# dbus, signal, ptrace and unix are only supported by recent apparmor
# versions. Comment them if the apparmor parser doesn't recognize them.
# This also needs additional rules to reach outside of the container via
# DBus, so just let all of DBus within the container.
dbus,
# Allow us to receive signals from anywhere. Note: if per-container profiles
# are supported, for container isolation this should be changed to something
# like:
# signal (receive) peer=unconfined,
# signal (receive) peer=/usr/bin/lxc-start,
signal (receive),
# Allow us to send signals to ourselves
signal peer=@{profile_name},
# Allow other processes to read our /proc entries, futexes, perf tracing and
# kcmp for now (they will need 'read' in the first place). Administrators can
# override with:
# deny ptrace (readby) ...
ptrace (readby),
# Allow other processes to trace us by default (they will need 'trace' in
# the first place). Administrators can override with:
# deny ptrace (tracedby) ...
ptrace (tracedby),
# Allow us to ptrace ourselves
ptrace peer=@{profile_name},
# Allow receive via unix sockets from anywhere. Note: if per-container
# profiles are supported, for container isolation this should be changed to
# something like:
# unix (receive) peer=(label=unconfined),
unix (receive),
# Allow all unix in the container
unix peer=(label=@{profile_name}),
# ignore DENIED message on / remount
deny mount options=(ro, remount) -> /,
deny mount options=(ro, remount, silent) -> /,
# allow tmpfs mounts everywhere
mount fstype=tmpfs,
# allow hugetlbfs mounts everywhere
mount fstype=hugetlbfs,
# allow mqueue mounts everywhere
mount fstype=mqueue,
# allow fuse mounts everywhere
mount fstype=fuse,
mount fstype=fuse.*,
# deny access under /proc/bus to avoid e.g. messing with pci devices directly
deny @{PROC}/bus/** wklx,
# deny writes in /proc/sys/fs but allow binfmt_misc to be mounted
mount fstype=binfmt_misc -> /proc/sys/fs/binfmt_misc/,
deny @{PROC}/sys/fs/** wklx,
# allow efivars to be mounted, writing to it will be blocked though
mount fstype=efivarfs -> /sys/firmware/efi/efivars/,
# block some other dangerous paths
deny @{PROC}/kcore rwklx,
deny @{PROC}/sysrq-trigger rwklx,
# deny writes in /sys except for /sys/fs/cgroup, also allow
# fusectl, securityfs and debugfs to be mounted there (read-only)
mount fstype=fusectl -> /sys/fs/fuse/connections/,
mount fstype=securityfs -> /sys/kernel/security/,
mount fstype=debugfs -> /sys/kernel/debug/,
deny mount fstype=debugfs -> /var/lib/ureadahead/debugfs/,
mount fstype=proc -> /proc/,
mount fstype=sysfs -> /sys/,
mount options=(rw, nosuid, nodev, noexec, remount) -> /sys/,
deny /sys/firmware/efi/efivars/** rwklx,
deny /sys/kernel/security/** rwklx,
mount options=(move) /sys/fs/cgroup/cgmanager/ -> /sys/fs/cgroup/cgmanager.lower/,
mount options=(ro, nosuid, nodev, noexec, remount, strictatime) -> /sys/fs/cgroup/,
# deny reads from debugfs
deny /sys/kernel/debug/{,**} rwklx,
# allow paths to be made slave, shared, private or unbindable
# FIXME: This currently doesn't work due to the apparmor parser treating those as allowing all mounts.
# mount options=(rw,make-slave) -> **,
# mount options=(rw,make-rslave) -> **,
# mount options=(rw,make-shared) -> **,
# mount options=(rw,make-rshared) -> **,
# mount options=(rw,make-private) -> **,
# mount options=(rw,make-rprivate) -> **,
# mount options=(rw,make-unbindable) -> **,
# mount options=(rw,make-runbindable) -> **,
# allow bind-mounts of anything except /proc, /sys and /dev
mount options=(rw,bind) /[^spd]*{,/**},
mount options=(rw,bind) /d[^e]*{,/**},
mount options=(rw,bind) /de[^v]*{,/**},
mount options=(rw,bind) /dev/.[^l]*{,/**},
mount options=(rw,bind) /dev/.l[^x]*{,/**},
mount options=(rw,bind) /dev/.lx[^c]*{,/**},
mount options=(rw,bind) /dev/.lxc?*{,/**},
mount options=(rw,bind) /dev/[^.]*{,/**},
mount options=(rw,bind) /dev?*{,/**},
mount options=(rw,bind) /p[^r]*{,/**},
mount options=(rw,bind) /pr[^o]*{,/**},
mount options=(rw,bind) /pro[^c]*{,/**},
mount options=(rw,bind) /proc?*{,/**},
mount options=(rw,bind) /s[^y]*{,/**},
mount options=(rw,bind) /sy[^s]*{,/**},
mount options=(rw,bind) /sys?*{,/**},
# allow moving mounts except for /proc, /sys and /dev
mount options=(rw,move) /[^spd]*{,/**},
mount options=(rw,move) /d[^e]*{,/**},
mount options=(rw,move) /de[^v]*{,/**},
mount options=(rw,move) /dev/.[^l]*{,/**},
mount options=(rw,move) /dev/.l[^x]*{,/**},
mount options=(rw,move) /dev/.lx[^c]*{,/**},
mount options=(rw,move) /dev/.lxc?*{,/**},
mount options=(rw,move) /dev/[^.]*{,/**},
mount options=(rw,move) /dev?*{,/**},
mount options=(rw,move) /p[^r]*{,/**},
mount options=(rw,move) /pr[^o]*{,/**},
mount options=(rw,move) /pro[^c]*{,/**},
mount options=(rw,move) /proc?*{,/**},
mount options=(rw,move) /s[^y]*{,/**},
mount options=(rw,move) /sy[^s]*{,/**},
mount options=(rw,move) /sys?*{,/**},
# generated by: lxc-generate-aa-rules.py container-rules.base
deny /proc/sys/[^kn]*{,/**} wklx,
deny /proc/sys/k[^e]*{,/**} wklx,
deny /proc/sys/ke[^r]*{,/**} wklx,
deny /proc/sys/ker[^n]*{,/**} wklx,
deny /proc/sys/kern[^e]*{,/**} wklx,
deny /proc/sys/kerne[^l]*{,/**} wklx,
deny /proc/sys/kernel/[^smhd]*{,/**} wklx,
deny /proc/sys/kernel/d[^o]*{,/**} wklx,
deny /proc/sys/kernel/do[^m]*{,/**} wklx,
deny /proc/sys/kernel/dom[^a]*{,/**} wklx,
deny /proc/sys/kernel/doma[^i]*{,/**} wklx,
deny /proc/sys/kernel/domai[^n]*{,/**} wklx,
deny /proc/sys/kernel/domain[^n]*{,/**} wklx,
deny /proc/sys/kernel/domainn[^a]*{,/**} wklx,
deny /proc/sys/kernel/domainna[^m]*{,/**} wklx,
deny /proc/sys/kernel/domainnam[^e]*{,/**} wklx,
deny /proc/sys/kernel/domainname?*{,/**} wklx,
deny /proc/sys/kernel/h[^o]*{,/**} wklx,
deny /proc/sys/kernel/ho[^s]*{,/**} wklx,
deny /proc/sys/kernel/hos[^t]*{,/**} wklx,
deny /proc/sys/kernel/host[^n]*{,/**} wklx,
deny /proc/sys/kernel/hostn[^a]*{,/**} wklx,
deny /proc/sys/kernel/hostna[^m]*{,/**} wklx,
deny /proc/sys/kernel/hostnam[^e]*{,/**} wklx,
deny /proc/sys/kernel/hostname?*{,/**} wklx,
deny /proc/sys/kernel/m[^s]*{,/**} wklx,
deny /proc/sys/kernel/ms[^g]*{,/**} wklx,
deny /proc/sys/kernel/msg*/** wklx,
deny /proc/sys/kernel/s[^he]*{,/**} wklx,
deny /proc/sys/kernel/se[^m]*{,/**} wklx,
deny /proc/sys/kernel/sem*/** wklx,
deny /proc/sys/kernel/sh[^m]*{,/**} wklx,
deny /proc/sys/kernel/shm*/** wklx,
deny /proc/sys/kernel?*{,/**} wklx,
deny /proc/sys/n[^e]*{,/**} wklx,
deny /proc/sys/ne[^t]*{,/**} wklx,
deny /proc/sys/net?*{,/**} wklx,
deny /sys/[^fdc]*{,/**} wklx,
deny /sys/c[^l]*{,/**} wklx,
deny /sys/cl[^a]*{,/**} wklx,
deny /sys/cla[^s]*{,/**} wklx,
deny /sys/clas[^s]*{,/**} wklx,
deny /sys/class/[^n]*{,/**} wklx,
deny /sys/class/n[^e]*{,/**} wklx,
deny /sys/class/ne[^t]*{,/**} wklx,
deny /sys/class/net?*{,/**} wklx,
deny /sys/class?*{,/**} wklx,
deny /sys/d[^e]*{,/**} wklx,
deny /sys/de[^v]*{,/**} wklx,
deny /sys/dev[^i]*{,/**} wklx,
deny /sys/devi[^c]*{,/**} wklx,
deny /sys/devic[^e]*{,/**} wklx,
deny /sys/device[^s]*{,/**} wklx,
deny /sys/devices/[^v]*{,/**} wklx,
deny /sys/devices/v[^i]*{,/**} wklx,
deny /sys/devices/vi[^r]*{,/**} wklx,
deny /sys/devices/vir[^t]*{,/**} wklx,
deny /sys/devices/virt[^u]*{,/**} wklx,
deny /sys/devices/virtu[^a]*{,/**} wklx,
deny /sys/devices/virtua[^l]*{,/**} wklx,
deny /sys/devices/virtual/[^n]*{,/**} wklx,
deny /sys/devices/virtual/n[^e]*{,/**} wklx,
deny /sys/devices/virtual/ne[^t]*{,/**} wklx,
deny /sys/devices/virtual/net?*{,/**} wklx,
deny /sys/devices/virtual?*{,/**} wklx,
deny /sys/devices?*{,/**} wklx,
deny /sys/f[^s]*{,/**} wklx,
deny /sys/fs/[^c]*{,/**} wklx,
deny /sys/fs/c[^g]*{,/**} wklx,
deny /sys/fs/cg[^r]*{,/**} wklx,
deny /sys/fs/cgr[^o]*{,/**} wklx,
deny /sys/fs/cgro[^u]*{,/**} wklx,
deny /sys/fs/cgrou[^p]*{,/**} wklx,
deny /sys/fs/cgroup?*{,/**} wklx,
deny /sys/fs?*{,/**} wklx,
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