bootupd_selinux(8)

💖 bootupd_selinux(8) — your girl's guide to the SELinux Policy for bootupd

okay so this is page 8 of the SELinux Policy bootupd manual, and honestly? it's giving secure-boot-fairy realness 🧚✨ let's get into it bestie

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✨ NAME ✨

bootupd_selinux — the Security Enhanced Linux Policy for the bootupd processes 🎀

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🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the bootupd processes via flexible mandatory access control. no cap, that's the whole flex 💅

The bootupd processes execute with the bootupd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep bootupd_t

like literally just run that and see what's up 🔍

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🌸 ENTRYPOINTS 🌸

The bootupd_t SELinux type can be entered via the bootupd_exec_t file type.

The default entrypoint paths for the bootupd_t domain are the following:

/usr/bin/bootupctl, /usr/libexec/bootupd

those are your doors in, bestie 🚪✨

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👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system 🫶

You can see the context of a process using the -Z option to ps

Policy governs the access confined processes have to files. SELinux bootupd policy is very flexible allowing users to setup their bootupd processes in as secure a method as possible.

The following process types are defined for bootupd:

bootupd_t

Note: semanage permissive -a bootupd_t can be used to make the process type bootupd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so it's like, chill mode but the receipts still get printed 😭🧾

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🌈 BOOLEANS 🌈

SELinux policy is customizable based on least access required. bootupd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run bootupd with the tightest access possible. tightest access possible, that's the motto fr fr 💜

If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

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🍓 MANAGED FILES 🍓

The SELinux process type bootupd_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions. yeah, SELinux isn't out here overriding your regular perms, both have to agree 😤

bootupd_tmp_t

bootupd_var_run_t

/run/bootupd-lock
/run/bootupd.sock

cluster_conf_t

/etc/cluster(/.*)?

cluster_var_lib_t

/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?

cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

dosfs_t

root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

look at all those paths, she's thorough 👀💅

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🎀 FILE CONTEXTS 🎀

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to ls

Policy governs the access confined processes have to these files. SELinux bootupd policy is very flexible allowing users to setup their bootupd processes in as secure a method as possible.

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⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the bootupd, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t bootupd_exec_t '/srv/bootupd/content(/.*)?'
restorecon -R -v /srv/mybootupd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise 🙈

The following file types are defined for bootupd:

bootupd_exec_t

• Set files with the bootupd_exec_t type, if you want to transition an executable to the bootupd_t domain.

Paths:

/usr/bin/bootupctl, /usr/libexec/bootupd

bootupd_tmp_t

• Set files with the bootupd_tmp_t type, if you want to store bootupd temporary files in the /tmp directories.

bootupd_unit_file_t

• Set files with the bootupd_unit_file_t type, if you want to treat the files as bootupd unit content.

Paths:

/usr/lib/systemd/system/bootupd.socket,
/usr/lib/systemd/system/bootupd.service

bootupd_var_run_t

• Set files with the bootupd_var_run_t type, if you want to store the bootupd files under the /run or /var/run directory.

Paths:

/run/bootupd-lock, /run/bootupd.sock

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels. temporary = chcon, permanent = semanage fcontext + restorecon, don't mix 'em up bestie 😭💀

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💅 COMMANDS 💅

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings. yes a whole GUI, for the visual learners out there 🖥️✨

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🫶 AUTHOR 🫶

This manual page was auto-generated using sepolicy manpage. (she wrote herself, main character energy honestly 👑)

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🔥 SEE ALSO 🔥

selinux(8), bootupd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

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that's the whole page, you ate that 💖 this version of bootupd page 8 shipped on 26-10-06 — go forth and label responsibly, ily, bye 🎀✨🦋