staff_selinux(8)

πŸ“¦
version 20250627+git412.dbf877ab7 Β· 7 versions
, in opensuse-leap 16.0

🌸 NAME 🌸

ok so this is the manual page for staff_selinux(8) β€” the header up top literally says staff SELinux Policy documentation, that's this page πŸ’… β€” and the whole thing is about:

staff_u β€” Administrator's unprivileged user β€” Security Enhanced Linux Policy

yes bestie, "administrator's unprivileged user" is a real phrase, we love an oxymoron, moving on 🫢


✨ DESCRIPTION ✨

staff_u is an SELinux User defined in the SELinux policy. SELinux users have default roles, staff_r. The default role has a default type, staff_t, associated with it.

The SELinux user will usually login to a system with a context that looks like:

staff_u:staff_r:staff_t:s0 - s0:c0.c1023

Linux users are automatically assigned an SELinux users at login. Login programs use the SELinux User to assign initial context to the user's shell.

SELinux policy uses the context to control the user's access.

By default all users are assigned to the SELinux user via the __default__ flag.

On Targeted policy systems the __default__ user is assigned to the unconfined_u SELinux user.

You can list all Linux User to SELinux user mapping using:

semanage login -l

If you wanted to change the default user mapping to use the staff_u user, you would execute:

semanage login -m -s staff_u __default__

If you want to map the one Linux user (joe) to the SELinux user staff, you would execute:

$ semanage login -a -s staff_u joe

(joe is main character of this man page fr, we love joe 🌈)


πŸ‘‘ USER DESCRIPTION πŸ‘‘

The SELinux user staff_u is defined in policy as a unprivileged user. SELinux prevents unprivileged users from doing administration tasks without transitioning to a different role.

like, that's the whole vibe: you're staff, you're not root, and if you want admin stuff you gotta transition to another role. periodt πŸ’…


πŸ”₯ SUDO πŸ”₯

The SELinux user staff can execute sudo.

You can set up sudo to allow staff to transition to an administrative domain:

Add one or more of the following record to sudoers using visudo.


πŸ•ΈοΈ the webadm_r one

USERNAME ALL=(ALL) ROLE=webadm_r TYPE=webadm_t COMMAND

sudo will run COMMAND as staff_u:webadm_r:webadm_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


πŸ¦‹ the unconfined_r one

USERNAME ALL=(ALL) ROLE=unconfined_r TYPE=unconfined_t COMMAND

sudo will run COMMAND as staff_u:unconfined_r:unconfined_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


πŸŽ€ the sysadm_r one

USERNAME ALL=(ALL) ROLE=sysadm_r TYPE=sysadm_t COMMAND

sudo will run COMMAND as staff_u:sysadm_r:sysadm_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


🧚 the secadm_r one

USERNAME ALL=(ALL) ROLE=secadm_r TYPE=secadm_t COMMAND

sudo will run COMMAND as staff_u:secadm_r:secadm_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


πŸ“ the logadm_r one

USERNAME ALL=(ALL) ROLE=logadm_r TYPE=logadm_t COMMAND

sudo will run COMMAND as staff_u:logadm_r:logadm_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


πŸ’œ the dbadm_r one

USERNAME ALL=(ALL) ROLE=dbadm_r TYPE=dbadm_t COMMAND

sudo will run COMMAND as staff_u:dbadm_r:dbadm_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


⭐ the auditadm_r one

USERNAME ALL=(ALL) ROLE=auditadm_r TYPE=auditadm_t COMMAND

sudo will run COMMAND as staff_u:auditadm_r:auditadm_t:LEVEL

You might also need to add one or more of these new roles to your SELinux user record.

List the SELinux roles your SELinux user can reach by executing:

$ semanage user -l |grep selinux_name

Modify the roles list and add staff_r to this list.

$ semanage user -m -R 'staff_r webadm_r unconfined_r sysadm_r secadm_r logadm_r dbadm_r auditadm_r' staff_u

For more details you can see semanage man page.


πŸ’€ and after ALL of that, plot twist: the SELinux type staff_t is not allowed to execute sudo.

not me reading seven whole sudo recipes just for the page to say the base type can't sudo 😭 that's the transition stuff we were talking about, bestie β€” the type matters.


πŸ–₯️ X WINDOWS LOGIN πŸ–₯️

The SELinux user staff_u is able to X Windows login.

graphical login? slay. ✨


🌐 NETWORK 🌐

The SELinux user staff_u is able to listen on the following tcp ports:

  • all ports without defined types
  • 6000-6020
  • 1716
  • 32768-60999
  • 3689
  • all ports >= 1024

The SELinux user staff_u is able to connect to the following tcp ports:

  • 8955
  • 53,853
  • all ports
  • 389,636,3268,3269,7389
  • all ports without defined types
  • 32768-60999
  • all ports < 1024
  • 9080
  • 88,750,4444

The SELinux user staff_u is able to listen on the following udp ports:

  • 32768-60999
  • 5353
  • all ports without defined types
  • 1716
  • all ports >= 1024

The SELinux user staff_u is able to connect to the following tcp ports:

  • 8955
  • 53,853
  • all ports
  • 389,636,3268,3269,7389
  • all ports without defined types
  • 32768-60999
  • all ports < 1024
  • 9080
  • 88,750,4444
πŸ™ˆ yes it says "tcp ports" a second time at the end with the exact same list, no I'm not fixing it, that's literally what the page says πŸ’€

πŸŽ›οΈ BOOLEANS πŸŽ›οΈ

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

like, these are your toggles bestie, flip with care 🫢

  • staff_use_svirt β€” If you want to allow staff user to create and transition to svirt domains, you must turn on the staff_use_svirt boolean. Disabled by default. β†’ setsebool -P staff_use_svirt 1
  • cron_userdomain_transition β€” If you want to determine whether crond can execute jobs in the user domain as opposed to the the generic cronjob domain, you must turn on the cron_userdomain_transition boolean. Enabled by default. β†’ setsebool -P cron_userdomain_transition 1
  • deny_bluetooth β€” 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. β†’ setsebool -P deny_bluetooth 1
  • deny_execmem β€” If you want to deny user domains applications to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla, you must turn on the deny_execmem boolean. Disabled by default. β†’ setsebool -P deny_execmem 1
  • deny_ptrace β€” If you want to deny any process from ptracing or debugging any other processes, you must turn on the deny_ptrace boolean. Disabled by default. β†’ setsebool -P deny_ptrace 1
  • fips_mode β€” If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default. β†’ setsebool -P fips_mode 1
  • git_session_users β€” If you want to determine whether calling user domains can execute Git daemon in the git_session_t domain, you must turn on the git_session_users boolean. Disabled by default. β†’ setsebool -P git_session_users 1
  • httpd_enable_cgi β€” If you want to allow httpd cgi support, you must turn on the httpd_enable_cgi boolean. Enabled by default. β†’ setsebool -P httpd_enable_cgi 1
  • httpd_unified β€” If you want to unify HTTPD handling of all content files, you must turn on the httpd_unified boolean. Disabled by default. β†’ setsebool -P httpd_unified 1
  • nis_enabled β€” If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default. β†’ setsebool -P nis_enabled 1
  • polipo_session_users β€” If you want to determine whether calling user domains can execute Polipo daemon in the polipo_session_t domain, you must turn on the polipo_session_users boolean. Disabled by default. β†’ setsebool -P polipo_session_users 1
  • pppd_for_user β€” If you want to allow pppd to be run for a regular user, you must turn on the pppd_for_user boolean. Disabled by default. β†’ setsebool -P pppd_for_user 1
  • selinuxuser_execmod β€” If you want to allow all unconfined executables to use libraries requiring text relocation that are not labeled textrel_shlib_t, you must turn on the selinuxuser_execmod boolean. Disabled by default. β†’ setsebool -P selinuxuser_execmod 1
  • selinuxuser_execstack β€” If you want to allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla, you must turn on the selinuxuser_execstack boolean. Disabled by default. β†’ setsebool -P selinuxuser_execstack 1
😭 "should never, ever be necessary" β€” the page is BEGGING you, listen to it
  • selinuxuser_mysql_connect_enabled β€” If you want to allow users to connect to the local mysql server, you must turn on the selinuxuser_mysql_connect_enabled boolean. Disabled by default. β†’ setsebool -P selinuxuser_mysql_connect_enabled 1
  • selinuxuser_rw_noexattrfile β€” If you want to allow user to r/w files on filesystems that do not have extended attributes (FAT, CDROM, FLOPPY), you must turn on the selinuxuser_rw_noexattrfile boolean. Disabled by default. β†’ setsebool -P selinuxuser_rw_noexattrfile 1
  • selinuxuser_use_ssh_chroot β€” If you want to allow user to use ssh chroot environment, you must turn on the selinuxuser_use_ssh_chroot boolean. Disabled by default. β†’ setsebool -P selinuxuser_use_ssh_chroot 1
  • use_nfs_home_dirs β€” If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Enabled by default. β†’ setsebool -P use_nfs_home_dirs 1
  • use_samba_home_dirs β€” If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default. β†’ setsebool -P use_samba_home_dirs 1

🏠 HOME_EXEC 🏠

The SELinux user staff_u is able execute home content files.

your ~ stuff? executable by staff? yes bestie πŸ’…


πŸ¦‹ that's the tea so far β€” this page literally keeps going, so keep reading, part two is right there ✨

πŸ”„ TRANSITIONS πŸ”„

ok so bestie, when staff_t tries to run a program, exactly three things can go down. three. not two, not four. bestie math πŸ’…

  1. SELinux Policy can straight-up deny staff_t from executing the program. like, blocked. no entry. πŸ™ˆ
  2. SELinux Policy can allow staff_t to execute the program in the current user type. no glow-up, no transformation, just runs as-is.

wanna see which types the SELinux user staff_t can execute without transitioning? run this, bestie:

sesearch -A -s staff_t -c file -p execute_no_trans
  1. SELinux can allow staff_t to execute the program and transition to a new type. it's giving main character energy β€” the process literally becomes someone new ✨

and to see which types the SELinux user staff_t can execute and transition into:

$ sesearch -A -s staff_t -c process -p transition

πŸ“ MANAGED FILES πŸ“

okay so the SELinux process type staff_t can manage files labeled with the following file types. the paths listed are the default paths for these file types. and hiii, important reminder: the process's UID still needs to have DAC permissions. so like, SELinux saying yes doesn't mean the universe says yes 🫢

  • alsa_home_t
/home/[^/]+/.asoundrc
  • auth_cache_t
/var/cache/coolkey(/.*)?
  • bluetooth_helper_tmp_t
  • bluetooth_helper_tmpfs_t
  • chrome_sandbox_tmpfs_t
  • dirsrv_config_t
/etc/dirsrv(/.*)?
  • dirsrv_var_lib_t
/var/lib/dirsrv(/.*)?
  • dirsrv_var_log_t
/var/log/dirsrv(/.*)?
  • faillog_t
/var/log/btmp.*
/run/faillock(/.*)?
/var/log/faillog.*
/var/log/tallylog.*
  • games_data_t
/var/games(/.*)?
/var/lib/games(/.*)?
  • gconf_tmp_t
/tmp/gconfd-[^/]+/.*
  • gpg_agent_tmp_t
/home/[^/]+/.gnupg/log-socket
  • httpd_user_content_t
/home/[^/]+/((www)|(web)|(public_html))(/.+)?
  • httpd_user_htaccess_t
/home/[^/]+/((www)|(web)|(public_html))(/.*)?/.htaccess
  • httpd_user_ra_content_t
/home/[^/]+/((www)|(web)|(public_html))(/.*)?/logs(/.*)?
  • httpd_user_rw_content_t
  • httpd_user_script_exec_t
/home/[^/]+/((www)|(web)|(public_html))/cgi-bin(/.+)?
  • krb5_host_rcache_t β€” the whole cache crew, look at this list 😭
/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
  • mail_spool_t
/var/mail(/.*)?
/var/spool/imap(/.*)?
/var/spool/mail(/.*)?
/var/spool/smtpd(/.*)?
  • mqueue_spool_t
/var/spool/(client)?mqueue(/.*)?
/var/spool/mqueue.in(/.*)?
  • pulseaudio_tmpfs_t
  • pulseaudio_tmpfsfile β€” yes bestie, that's the whole name, no _t, we don't fix it, we respect it πŸ‘‘
  • sandbox_tmpfs_type β€” all sandbox content in tmpfs file systems
  • security_t
/selinux
  • session_dbusd_tmp_t
/run/user/[0-9]+/bus
/run/user/[0-9]+/dbus(/.*)?
/run/user/[0-9]+/dbus-1(/.*)?
  • usbfs_t
  • user_fonts_cache_t
/root/.fontconfig(/.*)?
/root/.fonts/auto(/.*)?
/root/.fonts.cache-.*
/root/.cache/fontconfig(/.*)?
/home/[^/]+/.fontconfig(/.*)?
/home/[^/]+/.fonts/auto(/.*)?
/home/[^/]+/.fonts.cache-.*
/home/[^/]+/.cache/fontconfig(/.*)?
  • user_home_type β€” literally all user home files. the whole home. iconic 🏠
  • user_tmp_t
/run/tlog(/.*)?
/run/user/[^/]+
/dev/shm/mono.*
/tmp/.ICE-unix(/.*)?
/tmp/.X11-unix(/.*)?
/dev/shm/pulse-shm.*
/run/user
/tmp/.X0-lock
/tmp/hsperfdata_root
/var/tmp/hsperfdata_root
/home/[^/]+/tmp
/home/[^/]+/.tmp
/run/user/[0-9]+
/tmp/gconfd-[^/]+
  • user_tmp_type β€” all user tmp files πŸ—‚οΈ
  • virt_image_type β€” all virtual image files πŸ–ΌοΈ
  • wireshark_tmp_t
  • wireshark_tmpfs_t
  • xserver_tmpfs_t

πŸ’» COMMANDS πŸ’»

so when you actually wanna do stuff, here's the toolkit bestie 🧰

  • semanage fcontext can also be used to manipulate default file context mappings. (fcontext girlies rise ✨)
  • semanage permissive can also be used to manipulate whether or not a process type is permissive. (permissive vs enforcing, the eternal vibe check)
  • semanage module can also be used to enable/disable/install/remove policy modules. (module management slay πŸ’…)
  • semanage boolean can also be used to manipulate the booleans. (booleans!! yes the flags, not the true/false thing)
  • system-config-selinux is a GUI tool available to customize SELinux policy settings. (a GUI!! for the girlies who like clicking πŸ–±οΈ)

✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage. no cap, the machine wrote it, I'm just making it cute πŸ’–


πŸ‘€ SEE ALSO πŸ‘€

go touch grass in these other pages bestie, they're all linked:

selinux(8), staff(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), staff_consolehelper_selinux(8), staff_consolehelper_selinux(8), staff_dbusd_selinux(8), staff_dbusd_selinux(8), staff_gkeyringd_selinux(8), staff_gkeyringd_selinux(8), staff_screen_selinux(8), staff_screen_selinux(8), staff_seunshare_selinux(8), staff_seunshare_selinux(8), staff_ssh_agent_selinux(8), staff_ssh_agent_selinux(8), staff_sudo_selinux(8), staff_sudo_selinux(8), staff_wine_selinux(8), staff_wine_selinux(8)

and yeah, the doubled-up refs are literally in the original β€” I'm not duplicating for fun, I promise 😭 keep every detail bestie

and that's the whole page!! πŸŽ€ this cutie was brought to you by mgrepl@redhat.com, hanging out under the staff section, page staff_selinux(8), with a date stamp of staff on the footer ✨ go forth and be SELinux-literate, bestie, u ate πŸ’…πŸ¦‹

πŸ“¦ where this page comes from