mozilla_selinux(8)

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

🦊 mozilla_selinux — the SELinux policy for mozilla processes 💅

OK so bestie, this is the manual page for mozilla_selinux(8), section 8 of the manual, and it's literally all about the SELinux policy for the mozilla processes. Grab a snack, we're doing policy today. 🍓

✨ NAME ✨

mozilla_selinux — Security Enhanced Linux Policy for the mozilla processes

🌸 DESCRIPTION 🌸

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

The mozilla processes execute with the mozilla_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 mozilla_t

That's it. That's the whole check. Iconic, honestly. 🎀

🚪 ENTRYPOINTS 🚪

So the mozilla_t SELinux type can be entered via the mozilla_exec_t file type. That's the door. That's how you get in. 🫶

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

/usr/lib/[^/]*firefox[^/]*/firefox
/usr/lib/[^/]*firefox[^/]*/firefox-bin
/usr/lib/mozilla[^/]*/reg.+
/usr/lib/firefox[^/]*/mozilla-.*
/usr/lib/mozilla[^/]*/mozilla-.*
/usr/bin/mozilla-[0-9].*
/usr/lib/netscape/.+/communicator/communicator-smotif.real
/usr/bin/mozilla-bin-[0-9].*
/usr/bin/mozilla
/usr/bin/epiphany
/usr/bin/netscape
/usr/bin/epiphany-bin
/usr/lib/galeon/galeon
/usr/bin/mozilla-snapshot
/usr/lib/netscape/base-4/wrapper

Copy those exactly, bestie — they're regexes, not suggestions. 💀

👑 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 mozilla policy is very flexible allowing users to setup their mozilla processes in as secure a method as possible.

The following process types are defined for mozilla:

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

So yeah — permissive mode stops the denying but the gossip (AVC messages) still shows up in the group chat. 😭

🎚️ BOOLEANS 🎚️

SELinux policy is customizable based on least access required. mozilla policy is extremely flexible and has several booleans that allow you to manipulate the policy and run mozilla with the tightest access possible. Tightest access possible = main character energy. 🔥

  • mozilla_read_content — If you want to allow confined web browsers to read home directory content, you must turn on the mozilla_read_content boolean. Disabled by default.
setsebool -P mozilla_read_content 1
  • 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
Lowkey important: that executable-and-writable memory thing is dangerous, and the executable should legit be reported in bugzilla. Not a drill. 🚨
  • 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
  • selinuxuser_direct_dri_enabled — If you want to allow regular users direct dri device access, you must turn on the selinuxuser_direct_dri_enabled boolean. Disabled by default.
setsebool -P selinuxuser_direct_dri_enabled 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.
setsebool -P selinuxuser_execstack 1
Fr fr, "should never, ever be necessary." The manpage said it, not me. If you're turning this on, something is deeply wrong and it should be reported in bugzilla. 🙈
  • 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
  • xserver_clients_write_xshm — If you want to allows clients to write to the X server shared memory segments, you must turn on the xserver_clients_write_xshm boolean. Disabled by default.
setsebool -P xserver_clients_write_xshm 1

That's all nine of them, periodt. ✨

📂 MANAGED FILES 📂

The SELinux process type mozilla_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 permissions, bestie — both vibes have to check out. 💜)

cifs_t

No default paths listed for this one.

ecryptfs_t

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

fusefs_t

/run/user/[0-9]+/gvfs

gnome_home_type

No default paths listed for this one.

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

mozilla_home_t

/home/[^/]+/.lyx(/.*)?
/home/[^/]+/.java(/.*)?
/home/[^/]+/.adobe(/.*)?
/home/[^/]+/.gnash(/.*)?
/home/[^/]+/.webex(/.*)?
/home/[^/]+/.IBMERS(/.*)?
/home/[^/]+/.galeon(/.*)?
/home/[^/]+/.spicec(/.*)?
/home/[^/]+/POkemon.*(/.*)?
/home/[^/]+/.icedtea(/.*)?
/home/[^/]+/.mozilla(/.*)?
/home/[^/]+/.phoenix(/.*)?
/home/[^/]+/.netscape(/.*)?
/home/[^/]+/.ICAClient(/.*)?
/home/[^/]+/.quakelive(/.*)?
/home/[^/]+/.macromedia(/.*)?
/home/[^/]+/.thunderbird(/.*)?
/home/[^/]+/.gcjwebplugin(/.*)?
/home/[^/]+/.grl-podcasts(/.*)?
/home/[^/]+/.cache/mozilla(/.*)?
/home/[^/]+/.icedteaplugin(/.*)?
/home/[^/]+/zimbrauserdata(/.*)?
/home/[^/]+/.juniper_networks(/.*)?
/home/[^/]+/.cache/icedtea-web(/.*)?
/home/[^/]+/abc
/home/[^/]+/mozilla.pdf
/home/[^/]+/.gnashpluginrc

Yes, /home/[^/]+/POkemon.*(/.*)? is really in there with that capital P and capital O and no é. Do not "fix" it. It's canon. 💀

mozilla_tmp_t

No default paths listed for this one.

mozilla_tmpfs_t

No default paths listed for this one.

nfs_t

No default paths listed for this one.

pulseaudio_home_t

/root/.pulse(/.*)?
/root/.config/pulse(/.*)?
/root/.esd_auth
/root/.pulse-cookie
/home/[^/]+/.pulse(/.*)?
/home/[^/]+/.config/pulse(/.*)?
/home/[^/]+/.esd_auth
/home/[^/]+/.pulse-cookie

user_fonts_cache_t

/root/.fontconfig(/.*)?
/root/.fonts/auto(/.*)?
/root/.fonts.cache-.*
/root/.cache/fontconfig(/.*)?
/home/[^/]+/.fontconfig(/.*)?
/home/[^/]+/.fonts/auto(/.*)?
/home/[^/]+/.fonts.cache-.*
/home/[^/]+/.cache/fontconfig(/.*)?

🗂️ FILE CONTEXTS 🗂️

SELinux requires files to have an extended attribute to define the file type. It's giving "every file has 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. SELinux mozilla policy is very flexible allowing users to setup their mozilla processes in as secure a method as possible.

🌈 STANDARD FILE CONTEXT 🌈

SELinux defines the file context types for the mozilla, 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 mozilla_exec_t '/srv/mozilla/content(/.*)?'
restorecon -R -v /srv/mymozilla_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for mozilla:

mozilla_conf_t

  • Set files with the mozilla_conf_t type, if you want to treat the files as mozilla configuration data, usually stored under the /etc directory.

mozilla_exec_t

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

Paths:

/usr/lib/[^/]*firefox[^/]*/firefox
/usr/lib/[^/]*firefox[^/]*/firefox-bin
/usr/lib/mozilla[^/]*/reg.+
/usr/lib/firefox[^/]*/mozilla-.*
/usr/lib/mozilla[^/]*/mozilla-.*
/usr/bin/mozilla-[0-9].*
/usr/lib/netscape/.+/communicator/communicator-smotif.real
/usr/bin/mozilla-bin-[0-9].*
/usr/bin/mozilla
/usr/bin/epiphany
/usr/bin/netscape
/usr/bin/epiphany-bin
/usr/lib/galeon/galeon
/usr/bin/mozilla-snapshot
/usr/lib/netscape/base-4/wrapper

mozilla_home_t

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

Paths:

/home/[^/]+/.lyx(/.*)?
/home/[^/]+/.java(/.*)?
/home/[^/]+/.adobe(/.*)?
/home/[^/]+/.gnash(/.*)?
/home/[^/]+/.webex(/.*)?
/home/[^/]+/.IBMERS(/.*)?
/home/[^/]+/.galeon(/.*)?
/home/[^/]+/.spicec(/.*)?
/home/[^/]+/POkemon.*(/.*)?
/home/[^/]+/.icedtea(/.*)?
/home/[^/]+/.mozilla(/.*)?
/home/[^/]+/.phoenix(/.*)?
/home/[^/]+/.netscape(/.*)?
/home/[^/]+/.ICAClient(/.*)?
/home/[^/]+/.quakelive(/.*)?
/home/[^/]+/.macromedia(/.*)?
/home/[^/]+/.thunderbird(/.*)?
/home/[^/]+/.gcjwebplugin(/.*)?
/home/[^/]+/.grl-podcasts(/.*)?
/home/[^/]+/.cache/mozilla(/.*)?
/home/[^/]+/.icedteaplugin(/.*)?
/home/[^/]+/zimbrauserdata(/.*)?
/home/[^/]+/.juniper_networks(/.*)?
/home/[^/]+/.cache/icedtea-web(/.*)?
/home/[^/]+/abc
/home/[^/]+/mozilla.pdf
/home/[^/]+/.gnashpluginrc

mozilla_plugin_config_exec_t

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

mozilla_plugin_exec_t

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

Paths:

/usr/lib/xulrunner[^/]*/plugin-container
/usr/lib/nspluginwrapper/npviewer.bin
/usr/bin/nspluginscan
/usr/bin/nspluginviewer
/usr/libexec/WebKitPluginProcess
/usr/lib/firefox/plugin-container

mozilla_plugin_rw_t

  • Set files with the mozilla_plugin_rw_t type, if you want to treat the files as mozilla plugin read/write content.

mozilla_plugin_tmp_t

  • Set files with the mozilla_plugin_tmp_t type, if you want to store mozilla plugin temporary files in the /tmp directories.

mozilla_plugin_tmpfs_t

  • Set files with the mozilla_plugin_tmpfs_t type, if you want to store mozilla plugin files on a tmpfs file system.

mozilla_tmp_t

  • Set files with the mozilla_tmp_t type, if you want to store mozilla temporary files in the /tmp directories.

mozilla_tmpfs_t

  • Set files with the mozilla_tmpfs_t type, if you want to store mozilla files on a tmpfs file system.
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 like — chcon is the temporary tattoo, semanage fcontext is the real ink, and restorecon is the artist actually applying it. 🎀 Don't mix those up or the labels will not slay. 💅

✨ COMMANDS ✨

okay bestie, these are the command cuties that go with this page — keep them close, they’re lowkey iconic 💅

  • semanage fcontext — can also be used to manipulate default file context mappings. yes, default file context mappings — that’s the whole vibe 🎀
  • semanage permissive — can also be used to manipulate whether or not a process type is permissive. permissive vs. not permissive, no cap ✨
  • semanage module — can also be used to enable/disable/install/remove policy modules. that slash situation is literally the whole menu, bestie 💖
  • semanage boolean — can also be used to manipulate the booleans. booleans, but make it semanage 🌸
  • system-config-selinux — is a GUI tool available to customize SELinux policy settings. GUI girlies, this one’s for you 🫶

🌸 AUTHOR 🌸

This manual page was auto-generated using sepolicy manpage . fr fr, it did not write itself — the machine did the typing, and we’re just here for the vibes 💀✨

💖 SEE ALSO 💖

the whole squad, in order, duplicates included because that’s what the page says and we do not erase the lore:

selinux(8), mozilla(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), mozilla_plugin_selinux(8), mozilla_plugin_selinux(8), mozilla_plugin_config_selinux(8), mozilla_plugin_config_selinux(8)

yes bestie, those plugin refs really do show up twice — iykyk 💅👑

🎀 that’s the whole page, bestie — source mozilla, version/date 26-10-06, living it up as mozilla_selinux(8). slay, bye! 💖🦋

📦 where this page comes from