AppArmor : プロファイルの有効化/無効化2022/12/16

	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.
13 profiles are loaded.
13 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/lib/snapd/snap-confine
   /usr/lib/snapd/snap-confine//mount-namespace-capture-helper
   /{,usr/}sbin/dhclient
   lsb_release
   man_filter
   man_groff
   nvidia_modprobe
   nvidia_modprobe//kmod
   tcpdump
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 92
drwxr-xr-x  8 root root  4096 Dec 15 15:53 ./
drwxr-xr-x 97 root root  4096 Dec 15 11:14 ../
drwxr-xr-x  2 root root  4096 Sep 19 12:51 abi/
drwxr-xr-x  4 root root 12288 Sep 19 12:51 abstractions/
drwxr-xr-x  2 root root  4096 Dec 15 15:43 disable/
drwxr-xr-x  2 root root  4096 Mar 10  2022 force-complain/
drwxr-xr-x  2 root root  4096 Sep 19 12:51 local/
-rw-r--r--  1 root root  1339 Mar 10  2022 lsb_release
-rw-r--r--  1 root root  1189 Mar 10  2022 nvidia_modprobe
-rw-r--r--  1 root root  3461 Jul 19 16:54 sbin.dhclient
drwxr-xr-x  5 root root  4096 Sep 19 12:51 tunables/
-rw-r--r--  1 root root  3465 Dec 15 15:53 usr.bin.man
-rw-r--r--  1 root root  1421 Jun 21  2021 usr.bin.tcpdump
-rw-r--r--  1 root root 28486 Nov 28 13:53 usr.lib.snapd.snap-confine.real
-rw-r--r--  1 root root  1592 Nov 16  2021 usr.sbin.rsyslogd

# 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.
10 profiles are loaded.
10 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/lib/snapd/snap-confine
   /usr/lib/snapd/snap-confine//mount-namespace-capture-helper
   /{,usr/}sbin/dhclient
   lsb_release
   nvidia_modprobe
   nvidia_modprobe//kmod
   tcpdump
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 8
drwxr-xr-x 2 root root 4096 Dec 15 13:14 ./
drwxr-xr-x 8 root root 4096 Dec  8 10:33 ../
lrwxrwxrwx 1 root root   27 Dec 15 13:14 usr.bin.man -> /etc/apparmor.d/usr.bin.man
lrwxrwxrwx 1 root root   33 Apr 21  2022 usr.sbin.rsyslogd -> /etc/apparmor.d/usr.sbin.rsyslogd

[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.
10 profiles are loaded.
10 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/lib/snapd/snap-confine
   /usr/lib/snapd/snap-confine//mount-namespace-capture-helper
   /{,usr/}sbin/dhclient
   lsb_release
   nvidia_modprobe
   nvidia_modprobe//kmod
   tcpdump
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.
13 profiles are loaded.
13 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/lib/snapd/snap-confine
   /usr/lib/snapd/snap-confine//mount-namespace-capture-helper
   /{,usr/}sbin/dhclient
   lsb_release
   man_filter
   man_groff
   nvidia_modprobe
   nvidia_modprobe//kmod
   tcpdump
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.