secadm_screen_selinux(8)

🎀 NAME 🎀

secadm_screen_selinux — the Security Enhanced Linux Policy page for the secadm_screen processes. Bestie, it's giving SELinux main character energy, and it's here to keep those processes in line. 💅

🔒 DESCRIPTION 🔒

Security-Enhanced Linux secures the secadm_screen processes via flexible mandatory access control. No cap, that's the whole security vibe. Periodt.

The secadm_screen processes execute with the secadm_screen_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 secadm_screen_t

🚪 ENTRYPOINTS 🚪

The secadm_screen_t SELinux type can be entered via the screen_exec_t file type. That's the entrypoint, iykyk.

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

• /usr/bin/tmux
• /usr/bin/screen

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system, fr fr. You can see the context of a process using the -Z option to ps.

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

The following process types are defined for secadm_screen:

secadm_screen_t

💡 Note: semanage permissive -a secadm_screen_t can be used to make the process type secadm_screen_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

🎚️ BOOLEANS 🎚️

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

🌟 fips_mode

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

🌟 nis_enabled

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

🌟 screen_allow_session_sharing

If you want to determine whether screen can use fsetid/setuid/setgid capability, you must turn on the screen_allow_session_sharing boolean. Disabled by default.

setsebool -P screen_allow_session_sharing 1

🌟 use_nfs_home_dirs

If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Enabled by default.

setsebool -P use_nfs_home_dirs 1

🌟 use_samba_home_dirs

If you want to support SAMBA home directories, you must turn on the use_samba_home_dirs boolean. Disabled by default.

setsebool -P use_samba_home_dirs 1

🗂️ MANAGED FILES 🗂️

The SELinux process type secadm_screen_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 — don't forget, bestie.

🗂️ 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

🗂️ user_tmp_type

all user tmp files

🛠️ 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.

✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage .

👀 SEE ALSO 👀

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

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🌈 Cute sign-off, bestie: this page comes from the secadm_screen source/version, date 26-10-06, and it's the secadm_screen_selinux(8) manual. Stay iconic and secure! 💖✨