procmail_selinux(8)

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

💅 procmail_selinux(8) — SELinux Policy procmail ✨

okay so this is the manual page for procmail_selinux, bestie, and it's literally all about the SELinux policy that babysits your procmail processes. it's giving "security guard but make it a whole manual page." let's get into it 🫶

🌸 NAME 🌸

procmail_selinux — Security Enhanced Linux Policy for the procmail processes

💖 DESCRIPTION 💖

Security-Enhanced Linux secures the procmail processes via flexible mandatory access control. no cap, that's the whole vibe — SELinux is out here running interference so your mail-sorting bestie can't color outside the lines.

The procmail processes execute with the procmail_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 procmail_t

that's it, that's the vibe check 🔍

🚪 ENTRYPOINTS 🚪

The procmail_t SELinux type can be entered via the procmail_exec_t file type.

the default entrypoint paths for the procmail_t domain are the following:

/usr/bin/procmail

so like, that's the door. one door. it's iconic behavior honestly 👑

🎭 PROCESS TYPES 🎭

SELinux defines process types (domains) for each process running on the system.

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

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

The following process types are defined for procmail:

procmail_t
Note: semanage permissive -a procmail_t can be used to make the process type procmail_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. it's like, you're letting it slide but the receipts still exist 😭

🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. procmail policy is extremely flexible and has several booleans that allow you to manipulate the policy and run procmail with the tightest access possible. tightest access = bestie behavior fr fr.

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 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 the heavy lifting so your change sticks — periodt 💅

📁 MANAGED FILES 📁

The SELinux process type procmail_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 your normal perms, she's just adding a second layer, iykyk.

cifs_t

data_home_t

  • /root/.local/share(/.*)?
  • /home/[^/]+/.local/share(/.*)?

dovecot_spool_t

  • /var/spool/dovecot(/.*)?

ecryptfs_t

  • /home/[^/]+/.Private(/.*)?
  • /home/[^/]+/.ecryptfs(/.*)?

fusefs_t

  • /run/user/[0-9]+/gvfs

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

mail_home_rw_t

  • /root/Maildir(/.*)?
  • /root/.esmtp_queue(/.*)?
  • /var/lib/arpwatch/.esmtp_queue(/.*)?
  • /var/cache/ddclient/.esmtp_queue(/.*)?
  • /home/[^/]+/.maildir(/.*)?
  • /home/[^/]+/Maildir(/.*)?
  • /home/[^/]+/.esmtp_queue(/.*)?

nfs_t

procmail_tmp_t

user_home_t

  • /home/[^/]+/.+

🗂️ FILE CONTEXTS 🗂️

SELinux requires files to have an extended attribute to define the file type. yes, files have little name tags. adorable.

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

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

🧚 EQUIVALENCE DIRECTORIES 🧚

procmail policy stores data with multiple different file context types under the /var/log/procmail directory. if you would like to store the data in a different directory you can use the semanage command to create an equivalence mapping. if you wanted to store this data under the /srv directory you would execute the following command:

semanage fcontext -a -e /var/log/procmail /srv/procmail
restorecon -R -v /srv/procmail

it's literally "same energy, different address" 🏡

⭐ STANDARD FILE CONTEXT ⭐

SELinux defines the file context types for the procmail, 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.

semanage fcontext -a -t procmail_exec_t '/srv/procmail/content(/.*)?'
restorecon -R -v /srv/myprocmail_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 procmail:

procmail_exec_t

  • Set files with the procmail_exec_t type, if you want to transition an executable to the procmail_t domain.

procmail_home_t

  • Set files with the procmail_home_t type, if you want to store procmail files in the users home directory.

Paths:

/root/.procmailrc, /home/[^/]+/.procmailrc

procmail_log_t

  • Set files with the procmail_log_t type, if you want to treat the data as procmail log data, usually stored under the /var/log directory.

Paths:

/var/log/procmail(/.*)?, /var/log/procmail.log.*

procmail_tmp_t

  • Set files with the procmail_tmp_t type, if you want to store procmail temporary files in the /tmp directories.
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. chcon is giving temporary tattoo, semanage fcontext + restorecon is giving actual ink 🖊️

🛠️ 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 bestie, a whole GUI, for when the terminal is doing too much 🌈

👑 AUTHOR 👑

This manual page was auto-generated using sepolicy manpage . — no human wrote this, it's literally the machine's own work, and honestly? slay 🤖

🔗 SEE ALSO 🔗

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

and that's the whole page, bestie 💜 this came from procmail — the version stamped 26-10-06 — so if you're citing it, that's the date/version combo to remember. go forth and label things correctly, mwah 🎀✨🦋

📦 where this page comes from