OPENVPN_UNCONFINED_SCRIPT_SELINUX(8)

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

🌸 OPENVPN_UNCONFINED_SCRIPT_SELINUX(8) 🌸

okay so bestie, welcome to the manual page for openvpn_unconfined_script_selinux — yes that's the whole manual name, it's long, we cope 💅 — and today we're learning all about the SELinux policy for the openvpn_unconfined_script processes. grab a snack, it's gonna be a vibe ✨

🎀 NAME 🎀

openvpn_unconfined_script_selinux — the Security Enhanced Linux Policy for the openvpn_unconfined_script processes. that's it, that's the name, she's iconic 👑

💖 DESCRIPTION 💖

Security-Enhanced Linux secures the openvpn_unconfined_script processes via flexible mandatory access control. yes, mandatory. no negotiating with SELinux, she's the main character 🔥

The openvpn_unconfined_script processes execute with the openvpn_unconfined_script_t SELinux type. wanna check if you've got these processes running? just run the ps command with the -Z qualifier. for example:

ps -eZ | grep openvpn_unconfined_script_t

literally that simple, go off 🫶

🚪 ENTRYPOINTS 🚪

The openvpn_unconfined_script_t SELinux type can be entered via the shell_exec_t, openvpn_unconfined_script_exec_t file types. so that's the doorway, no cap 🚪✨

the default entrypoint paths for the openvpn_unconfined_script_t domain are the following, and yes i'm listing every single one because we don't skip details in this house:

  • /usr/bin/d?ash
  • /usr/bin/ksh.*
  • /usr/bin/zsh.*
  • /usr/bin/esh
  • /usr/bin/bash
  • /usr/bin/fish
  • /usr/bin/mksh
  • /usr/bin/sash
  • /usr/bin/sesh
  • /usr/bin/tcsh
  • /usr/bin/yash
  • /usr/bin/bash2
  • /usr/bin/smrsh
  • /usr/bin/nologin
  • /usr/bin/scponly
  • /usr/bin/scponlyc
  • /usr/libexec/sesh
  • /usr/bin/git-shell
  • /usr/libexec/sudo/sesh
  • /usr/bin/cockpit-bridge
  • /usr/libexec/cockpit-agent
  • /usr/libexec/git-core/git-shell
  • /etc/openvpn/scripts(/.*)?

look at all those shells, it's giving shell buffet 🐚🍓

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. every process gets a little label, it's their whole identity tbh 💜

You can see the context of a process using the -Z option to ps. (same trick as before, love that for us)

Policy governs the access confined processes have to files. SELinux openvpn_unconfined_script policy is very flexible — it allows users to setup their openvpn_unconfined_script processes in as secure a method as possible. flexible and secure, she contains multitudes 🌈

The following process types are defined for openvpn_unconfined_script:

  • openvpn_unconfined_script_t
Note: semanage permissive -a openvpn_unconfined_script_t can be used to make the process type openvpn_unconfined_script_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, she won't block you, but she WILL be in the group chat talking about it 😭

🔘 BOOLEANS 🔘

SELinux policy is customizable based on least access required — tightest access possible, minimal vibe, maximum safety. openvpn_unconfined_script policy is extremely flexible and has several booleans that allow you to manipulate the policy and run openvpn_unconfined_script with the tightest access possible. let's go through them one by one, i got you 🫶

  • deny_execmem — 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
  • mmap_low_allowed — 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
  • secure_mode_insmod — If you want to disable kernel module loading, you must turn on the secure_mode_insmod boolean. Disabled by default.
setsebool -P secure_mode_insmod 1
  • selinuxuser_execheap — 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. 🚩 like bestie, red flag, please report it
setsebool -P selinuxuser_execheap 1
  • selinuxuser_execstack — 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. 💀 the "never, ever" is doing so much heavy lifting, heed it
setsebool -P selinuxuser_execstack 1

📁 MANAGED FILES 📁

The SELinux process type openvpn_unconfined_script_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 — SELinux isn't out here overriding DAC, she has boundaries, respect them 🙈

file_type

  • all files on the system

yeah. all of them. she's ambitious 🔥

🗂️ FILE CONTEXTS 🗂️

SELinux requires files to have an extended attribute to define the file type. every file's gotta wear its little name tag ✨

You can see the context of a file using the -Z option to ls. (-Z really is the moment, isn't it 💅)

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

🌟 STANDARD FILE CONTEXT 🌟

SELinux defines the file context types for the openvpn_unconfined_script. 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. like this:

semanage fcontext -a -t openvpn_unconfined_script_exec_t '/srv/openvpn_unconfined_script/content(/.*)?'
restorecon -R -v /srv/myopenvpn_unconfined_script_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 openvpn_unconfined_script:

openvpn_unconfined_script_exec_t

  • Set files with the openvpn_unconfined_script_exec_t type, if you want to transition an executable to the openvpn_unconfined_script_t domain. that's the glow-up pipeline: file type → domain 🦋
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. temporary (chcon) vs permanent (semanage fcontext + restorecon), know the difference bestie 🎀

🛠️ 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 GUI, for when the terminal is not the mood 🖱️✨

🖋️ AUTHOR 🖋️

This manual page was auto-generated using sepolicy manpage . — not a human, a script, and honestly she ate 🤖💅

👀 SEE ALSO 👀

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

go read those too, iykyk 📚🫶

that's the whole page bestie!! 🌸 this one came from openvpn_unconfined_script, dated 26-10-06, and it lives under openvp...selinux(8) — mwah, ily, stay labeled 💖

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