system_dbusd_selinux(8)

🌸 system_dbusd_selinux(8) — the girl's guide to the SELinux policy for system_dbusd 🌸

okay so bestie, welcome to system_dbusd_selinux — this is the Security Enhanced Linux Policy for the system_dbusd processes, and we're gonna get into it 💅

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✨ NAME ✨

system_dbusd_selinux — Security Enhanced Linux Policy for the system_dbusd processes. that's it, that's the whole vibe 🎀

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🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the system_dbusd processes via flexible mandatory access control. mandatory, bestie. it's not optional, it's the whole point ✨

The system_dbusd processes execute with the system_dbusd_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 system_dbusd_t

run it, see who's wearing the system_dbusd_t fit 👑

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🚪 ENTRYPOINTS 🚪

The system_dbusd_t SELinux type can be entered via the dbusd_exec_t file type. that's the door, that's the entrance, that's the velvet rope 🫶

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

/usr/bin/dbus-daemon(-1)?, /usr/bin/dbus-broker, /usr/bin/dbus-broker-launch, /lib/dbus-1/dbus-daemon-launch-helper, /usr/lib/dbus-1/dbus-daemon-launch-helper, /usr/libexec/dbus-1/dbus-daemon-launch-helper

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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 system_dbusd policy is very flexible, allowing users to setup their system_dbusd processes in as secure a method as possible. like, genuinely flexible, it's giving customizable ✨

The following process types are defined for system_dbusd:

• system_dbusd_t

Note: semanage permissive -a system_dbusd_t can be used to make the process type system_dbusd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it stops blocking you but it's still gonna text everyone about it 💀

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. system_dbusd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run system_dbusd with the tightest access possible. love that for us 🫶

If you want to deny all system processes and Linux users to use bluetooth wireless technology, you must turn on the deny_bluetooth boolean. Disabled by default.

setsebool -P deny_bluetooth 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

If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

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📁 MANAGED FILES 📁

The SELinux process type system_dbusd_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. SELinux is not out here doing DAC's job for it, no ma'am 🙈

💜 krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

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🗂️ FILE CONTEXTS 🗂️

SELinux requires files to have an extended attribute to define the file type. yes, every file needs its little label, it's their whole identity 💅

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 system_dbusd policy is very flexible, allowing users to setup their system_dbusd processes in as secure a method as possible. iconic behavior, honestly ✨

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the system_dbusd. 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 system_dbusd_tmp_t
'/srv/system_dbusd/content(/.*)?'
restorecon -R -v /srv/mysystem_dbusd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex my beloved 🧚

The following file types are defined for system_dbusd:

🌸 system_dbusd_tmp_t

• Set files with the system_dbusd_tmp_t type, if you want to store system dbusd temporary files in the /tmp directories.

🌸 system_dbusd_tmpfs_t

• Set files with the system_dbusd_tmpfs_t type, if you want to store system dbusd files on a tmpfs file system.

🌸 system_dbusd_var_lib_t

• Set files with the system_dbusd_var_lib_t type, if you want to store the system dbusd files under the /var/lib directory.

Paths:

/var/lib/dbus(/.*)?, /var/cache/ibus(/.*)?

🌸 system_dbusd_var_run_t

• Set files with the system_dbusd_var_run_t type, if you want to store the system dbusd files under the /run or /var/run directory.

Paths:

/run/dbus(/.*)?, /var/named/chroot/var/run/dbus(/.*)?

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 vs permanent bestie, know the difference 😭

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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 GUI, for when you're feeling clicky instead of typey 🖱️✨

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🫶 AUTHOR 🫶

This manual page was auto-generated using sepolicy manpage. not me being a robot-written icon 🤖💅

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🔗 SEE ALSO 🔗

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

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and that's the whole page, bestie!! brought to you by system_dbusd, dated 26-10-06 — go forth and label responsibly 💖🎀🦋