authconfig_selinux(8)

📦 version 38.1.87, in centos-stream 9

💅 authconfig_selinux — the SELinux glow-up for authconfig processes ✨

Okay bestie, gather round, because we're about to talk about Security Enhanced Linux Policy for the authconfig processes and honestly? It's giving main character energy. This is the authconfig_selinux(8) manual page and I'm about to make it make sense, no cap. 🫶

🌸 NAME 🌸

authconfig_selinux — Security Enhanced Linux Policy for the authconfig processes. That's the whole vibe. Periodt. 💖

✨ DESCRIPTION ✨

So here's the tea: Security-Enhanced Linux secures the authconfig processes via flexible mandatory access control. It's literally out here protecting your stuff. 🛡️

The authconfig processes execute with the authconfig_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. Like, just peep your processes, bestie:

ps -eZ | grep authconfig_t

That's it. That's the whole check. Slay. 💅

🚪 ENTRYPOINTS 🚪

The authconfig_t SELinux type can be entered via the authconfig_exec_t file type. So that's the doorway, iykyk.

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

/usr/share/authconfig/authconfig.py

One path. That's it. Iconic, honestly. 🎀

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. It's a whole thing, and it's lowkey genius.

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

Policy governs the access confined processes have to files. SELinux authconfig policy is very flexible allowing users to setup their authconfig processes in as secure a method as possible. So you can lock it down however you want, bestie. 🌈

The following process types are defined for authconfig:

  • authconfig_t
💀 Note: semanage permissive -a authconfig_t can be used to make the process type authconfig_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. So like, it's not fully turning off the alarms — the smoke detector still goes off, you're just not getting kicked out of the building. Noted. 🙈

🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. authconfig policy is extremely flexible and has several booleans that allow you to manipulate the policy and run authconfig with the tightest access possible. It's giving "customize your security settings like you're picking a phone case." Obsessed. 💜

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. 😬

setsebool -P deny_execmem 1

If you want to control the ability to mmap a low area of the address space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on the mmap_low_allowed boolean. Disabled by default.

setsebool -P mmap_low_allowed 1

If you want to disable kernel module loading, you must turn on the secure_mode_insmod boolean. Disabled by default. Locking the door, fr fr. 🔒

setsebool -P secure_mode_insmod 1

If you want to allow unconfined executables to make their heap memory executable. Doing this is a really bad idea. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla, you must turn on the selinuxuser_execheap boolean. Disabled by default. 🚨

setsebool -P selinuxuser_execheap 1

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. Enabled by default.

setsebool -P selinuxuser_execstack 1

📁 MANAGED FILES 📁

The SELinux process type authconfig_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. So SELinux isn't doing the whole job alone, bestie — your regular permissions still matter. 🫶

  • file_type — all files on the system. Literally all of them. The audacity. 💀

🌈 FILE CONTEXTS 🌈

SELinux requires files to have an extended attribute to define the file type. It's a whole labeling system, and honestly? It's a vibe.

You can see the context of a file using the -Z option to ls. Peep your labels, queen. 👀

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

STANDARD FILE CONTEXT

SELinux defines the file context types for the authconfig, 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. Here's the exact recipe:

semanage fcontext -a -t authconfig_var_lib_t
'/srv/myauthconfig_content(/.*)?'
restorecon -R -v /srv/myauthconfig_content
🧚 Note: SELinux often uses regular expressions to specify labels that match multiple files. So those (/.*)? bits are doing the work, iykyk. ✨

The following file types are defined for authconfig:

authconfig_exec_t

  • Set files with the authconfig_exec_t type, if you want to transition an executable to the authconfig_t domain. That's the entrypoint vibe. 🚪

authconfig_var_lib_t

  • Set files with the authconfig_var_lib_t type, if you want to store the authconfig files under the /var/lib directory. Classic /var/lib behavior. 📂
💀 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. So chcon is the quick fix, semanage fcontext + restorecon is the real deal. Don't get it twisted. 🙈

🛠️ COMMANDS 🛠️

semanage fcontext can also be used to manipulate default file context mappings. It's the tool for the job, bestie.

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. For when you want to point and click instead of typing. Valid. 💅

👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage. So no human wrote this originally — it's a robot's work, and I'm just here to make it cute. 🫶

👀 SEE ALSO 👀

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

And that's the whole page, bestie! Generated on 26-10-23, version authconfig — catch you on the flip side! 🌈✨💖

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