sysadm_su_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

✨ sysadm_su_selinux(8) — the girliepop guide to SELinux policy for sysadm_su ✨

Okay bestie, so this is the manual page for sysadm_su_selinux — it's literally the Security Enhanced Linux Policy for the sysadm_su processes. No cap, it's giving security realness and we're gonna get into all of it. 💅

🌸 NAME 🌸

sysadm_su_selinux — Security Enhanced Linux Policy for the sysadm_su processes. That's the whole vibe. ✨

🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the sysadm_su processes via flexible mandatory access control. Like, it's literally mandatory but also flexible? Iconic behavior honestly. 🎀

The sysadm_su processes execute with the sysadm_su_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 sysadm_su_t

Lowkey the easiest way to vibe check your processes. Go off. 💖

👑 ENTRYPOINTS 👑

The sysadm_su_t SELinux type can be entered via the su_exec_t file type. Main character energy fr fr.

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

  • /usr/(local/)?bin/ksu
  • /usr/bin/su
  • /usr/bin/kdesu

These are the doorways, the portals, the entrances to the domain bestie. Slay. ✨

🔥 PROCESS TYPES 🔥

SELinux defines process types (domains) for each process running on the system. It's a whole thing. 🌈

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

Policy governs the access confined processes have to files. SELinux sysadm_su policy is very flexible allowing users to setup their sysadm_su processes in as secure a method as possible. Obsessed with the flexibility honestly. 💜

The following process types are defined for sysadm_su:

  • sysadm_su_t
  • sysadm_sudo_t
Note: semanage permissive -a sysadm_su_t can be used to make the process type sysadm_su_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like, it's chill but also it's still watching you? Not me being watched by the AVC messages. 💀

🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. sysadm_su policy is extremely flexible and has several booleans that allow you to manipulate the policy and run sysadm_su with the tightest access possible. It's giving "customize your own adventure" and we're here for it. 🦋

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 confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

setsebool -P kerberos_enabled 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

Three booleans, three vibes. Periodt. 💅

🌈 MANAGED FILES 🌈

The SELinux process type sysadm_su_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. Like, SELinux can't do everything for you bestie, you still gotta have the permissions. 🙈

faillog_t

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

initrc_var_run_t

  • /run/sysconfig(/.*)?
  • /run/utmp
  • /run/keymap
  • /run/numlock-on
  • /run/setleds-on
  • /run/runlevel.dir
  • /run/setmixer_flag
  • /run/bootsplashctl

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

wtmpdb_journal_t

  • /var/lib/wtmpdb/wtmp.db-journal

That's a whole lotta file types and we listed every single one. No skipping, no summarizing, we ate that list UP. 🍓

🧚 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. It's giving clicky-clicky energy and sometimes that's exactly what you need. 💅

⭐ AUTHOR ⭐

This manual page was auto-generated using sepolicy manpage . — like it literally wrote itself, main character energy. ✨

💜 SEE ALSO 💜

Go read those if you wanna go deeper bestie, iykyk. 🫶

This page is brought to you by sysadm_su vibes, dated 26-10-06, and if you made it this far you're literally an icon. Bye bestie, slay your SELinux journey! 💖✨🎀🦋🌸💅
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