HTTPD_USER_SCRIPT_SELINUX(8)

💅 httpd_user_script_selinux(8) — the manual page, but make it make sense

okay bestie, so this is the manual page for httpd_user_script_selinux, and the manual itself lives in section 8 — it's giving "system administration realness" and honestly it ate. Let's get into it 💖

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✨ NAME ✨

httpd_user_script_selinux — the Security Enhanced Linux Policy for the httpd_user_script processes 🫶

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🌸 DESCRIPTION 🌸

So, Security-Enhanced Linux secures the httpd_user_script processes via flexible mandatory access control. That's the whole vibe. No cap.

The httpd_user_script processes execute with the httpd_user_script_t SELinux type. Wanna check if you've got these processes running? Run the ps command with the -Z qualifier, literally that's it.

For example:

ps -eZ | grep httpd_user_script_t

Go off, grep. 👑

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🦋 ENTRYPOINTS 🦋

The httpd_user_script_t SELinux type can be entered via the httpd_user_script_exec_t, httpdcontent file types. Those are the doors, bestie. 🚪✨

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

/home/[^/]+/((www)|(web)|(public_html))/cgi-bin(/.+)?

Look at that regex serving looks. 💅

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👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. Yes, every single one. Main character energy for everyone.

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

Policy governs the access confined processes have to files. The SELinux httpd_user_script policy is very flexible, allowing users to setup their httpd_user_script processes in as secure a method as possible. Tightest access possible, we love to see it.

The following process types are defined for httpd_user_script:

• httpd_user_script_t

Note: semanage permissive -a httpd_user_script_t can be used to make the process type httpd_user_script_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 mad, it's just taking notes. 😭

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🎀 BOOLEANS 🎀

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

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 httpd cgi support, you must turn on the httpd_enable_cgi boolean. Enabled by default.

setsebool -P httpd_enable_cgi 1

If you want to allow httpd to read home directories, you must turn on the httpd_enable_homedirs boolean. Disabled by default.

setsebool -P httpd_enable_homedirs 1

If you want to allow httpd to read user content, you must turn on the httpd_read_user_content boolean. Disabled by default.

setsebool -P httpd_read_user_content 1

If you want to unify HTTPD handling of all content files, you must turn on the httpd_unified boolean. Disabled by default.

setsebool -P httpd_unified 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

That -P is doing so much work btw — it's the "make it permanent" icon. ✨

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🌈 MANAGED FILES 🌈

The SELinux process type httpd_user_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 that, bestie, it's a team effort. 🤝

• httpd_user_rw_content_t
• 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

Every path accounted for, we don't skip. 💜

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🧚 FILE CONTEXTS 🧚

SELinux requires files to have an extended attribute to define the file type. It's giving "your file needs a little name tag."

You can see the context of a file using the -Z option to ls.

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

💫 STANDARD FILE CONTEXT 💫

SELinux defines the file context types for the httpd_user_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. Two-step slay. 🎀

semanage fcontext -a -t httpd_user_script_exec_t '/srv/httpd_user_script/content(/.*)?'
restorecon -R -v /srv/myhttpd_user_script_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. Regex girlies, rise. 🔥

The following file types are defined for httpd_user_script:

• httpd_user_script_exec_t
  • Set files with the httpd_user_script_exec_t type, if you want to transition an executable to the httpd_user_script_t 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. So chcon is the "for now" friend and semanage fcontext + restorecon is the "forever" friend. 💖

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⭐ 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. A GUI!! For the visual learners!! 🖥️✨

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🍓 AUTHOR 🍓

This manual page was auto-generated using sepolicy manpage. It wrote itself, honestly iconic. 💅

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💀 SEE ALSO 💀

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

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and that's the whole page, bestie 🫶 it's httpd_user_script on manual page date 26-10-06, rendered under the httpd_us...t_selinux(8) header — the truncated little guy up top 💜 go forth and label responsibly 🌸