AppArmor : プロファイルの有効化/無効化2023/07/13

	AppArmor でロードされている各プロファイルは、以下のようにして個別に有効化/無効化することができます。
[1]	AppArmor を操作するための各種ツールが含まれたパッケージをインストールしておきます。

root@dlp:~#

apt -y install apparmor-utils

[2]	プロファイルを無効化する場合は以下のように設定します。

root@dlp:~#

aa-status

apparmor module is loaded.
10 profiles are loaded.
10 profiles are in enforce mode.
   /usr/bin/man
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/NetworkManager/nm-dhcp-helper
   /usr/lib/connman/scripts/dhclient-script
   /{,usr/}sbin/dhclient
   lsb_release
   man_filter
   man_groff
   nvidia_modprobe
   nvidia_modprobe//kmod
0 profiles are in complain mode.
0 profiles are in kill mode.
0 profiles are in unconfined mode.
0 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
0 processes are in mixed mode.
0 processes are in kill mode.

# 各プロファイルの設定ファイルは以下

root@dlp:~#

ll /etc/apparmor.d

total 40
drwxr-xr-x 2 root root 4096 Jun 11 19:27 abi
drwxr-xr-x 4 root root 4096 Jun 11 19:27 abstractions
drwxr-xr-x 2 root root 4096 Feb 14 05:49 disable
drwxr-xr-x 2 root root 4096 Feb 14 05:49 force-complain
drwxr-xr-x 2 root root 4096 Jun 11 19:30 local
-rw-r--r-- 1 root root 1379 Feb 14 05:49 lsb_release
-rw-r--r-- 1 root root 1189 Feb 14 05:49 nvidia_modprobe
-rw-r--r-- 1 root root 3461 Mar 30 04:02 sbin.dhclient
drwxr-xr-x 5 root root 4096 Jun 11 19:27 tunables
-rw-r--r-- 1 root root 3448 Mar 12 17:23 usr.bin.man

# 例として [/usr/bin/man] を無効化

root@dlp:~#

aa-disable /usr/bin/man

Disabling /usr/bin/man.

root@dlp:~#

aa-status

apparmor module is loaded.
7 profiles are loaded.
7 profiles are in enforce mode.
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/NetworkManager/nm-dhcp-helper
   /usr/lib/connman/scripts/dhclient-script
   /{,usr/}sbin/dhclient
   lsb_release
   nvidia_modprobe
   nvidia_modprobe//kmod
0 profiles are in complain mode.
0 profiles are in kill mode.
0 profiles are in unconfined mode.
0 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
0 processes are in mixed mode.
0 processes are in kill mode.

# 無効化されたプロファイルは以下で確認可

root@dlp:~#

ll /etc/apparmor.d/disable

total 0
lrwxrwxrwx 1 root root 27 Jul 12 19:34 usr.bin.man -> /etc/apparmor.d/usr.bin.man

[3]	プロファイルを有効化する場合は以下のように設定します。

root@dlp:~#

aa-status

apparmor module is loaded.
7 profiles are loaded.
7 profiles are in enforce mode.
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/NetworkManager/nm-dhcp-helper
   /usr/lib/connman/scripts/dhclient-script
   /{,usr/}sbin/dhclient
   lsb_release
   nvidia_modprobe
   nvidia_modprobe//kmod
0 profiles are in complain mode.
0 profiles are in kill mode.
0 profiles are in unconfined mode.
0 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
0 processes are in mixed mode.
0 processes are in kill mode.

# 例として [/usr/bin/man] を [enforce] モードで有効化
# [enforce] モード : プロファイルで許可された動作のみを許可
# [complain] モード : プロファイルで許可されない動作をログに記録するが拒否はしない

root@dlp:~#

aa-enforce /usr/bin/man

Setting /usr/bin/man to enforce mode.

root@dlp:~#

aa-status

apparmor module is loaded.
10 profiles are loaded.
10 profiles are in enforce mode.
   /usr/bin/man
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/NetworkManager/nm-dhcp-helper
   /usr/lib/connman/scripts/dhclient-script
   /{,usr/}sbin/dhclient
   lsb_release
   man_filter
   man_groff
   nvidia_modprobe
   nvidia_modprobe//kmod
0 profiles are in complain mode.
0 profiles are in kill mode.
0 profiles are in unconfined mode.
0 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
0 processes are in mixed mode.
0 processes are in kill mode.