groupadd_selinux(8)

✨ groupadd_selinux(8) — the SELinux policy glow-up for groupadd ✨

okay so bestie, this is the groupadd_selinux manual page — the SELinux Policy groupadd one — and it's literally your guide to locking things down for the whole groupadd squad. 🫶

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💖 NAME 💖

groupadd_selinux — Security Enhanced Linux Policy for the groupadd processes

🌸 DESCRIPTION 🌸

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

The groupadd processes execute with the groupadd_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 groupadd_t

🎀 ENTRYPOINTS 🎀

The groupadd_t SELinux type can be entered via the groupadd_exec_t file type.

The default entrypoint paths for the groupadd_t domain are literally these:

/usr/bin/gpasswd, /usr/bin/groupadd, /usr/bin/groupdel,
/usr/bin/groupmod

🦋 PROCESS TYPES 🦋

SELinux defines process types (domains) for each process running on the system. it's giving organized.

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

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

The following process types are defined for groupadd:

• groupadd_t

Note: semanage permissive -a groupadd_t can be used to make the process type groupadd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. ⚠️ so like, the receipts are still there.

💅 BOOLEANS 💅

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

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

If you want to allow samba to act as the domain controller, add users, groups and change passwords, you must turn on the samba_domain_controller boolean. Disabled by default.

setsebool -P samba_domain_controller 1

🌈 MANAGED FILES 🌈

The SELinux process type groupadd_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. (yes bestie, DAC still matters, don't come for me 💀)

🍓 faillog_t

/var/log/btmp.*
/run/faillock(/.*)?
/var/log/faillog.*
/var/log/tallylog.*

🧚 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

⭐ lastlog_t

/var/log/lastlog.*
/var/lib/lastlog(/.*)?

👑 security_t

/selinux

💜 shadow_t

/etc/tcb/.+/shadow.*
/etc/shadow.*
/etc/gshadow.*
/etc/nshadow.*
/var/db/shadow.*
/etc/security/opasswd
/etc/security/opasswd.old

🔥 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 groupadd policy is very flexible allowing users to setup their groupadd processes in as secure a method as possible.

🌟 STANDARD FILE CONTEXT 🌟

SELinux defines the file context types for the groupadd. If you wanted to store files with these types in different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. slay, let's do it:

semanage fcontext -a -t groupadd_exec_t '/srv/groupadd/content(/.*)?'
restorecon -R -v /srv/mygroupadd_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies stay winning 💅

The following file types are defined for groupadd:

• groupadd_exec_t — Set files with the groupadd_exec_t type, if you want to transition an executable to the groupadd_t domain.

Paths:

/usr/bin/gpasswd, /usr/bin/groupadd, /usr/bin/groupdel,
/usr/bin/groupmod

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. 🫡

💻 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 when you're feeling fancy ✨

🎀 AUTHOR 🎀

This manual page was auto-generated using sepolicy manpage. (the algorithm ate, honestly)

👑 SEE ALSO 👑

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

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that's the whole page bestie, you're so welcome 💖 this gem dropped on 26-10-06 and comes to you from the groupadd corner of the SELinux universe — now go forth and configure responsibly 🦋✨