Security-Enhanced Linux secures the pulseaudio processes via flexible mandatory access control.
The pulseaudio processes execute with the pulseaudio_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
ps -eZ | grep pulseaudio_t
The pulseaudio_t SELinux type can be entered via the pulseaudio_exec_t file type.
The default entrypoint paths for the pulseaudio_t domain are the following:
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 psbP
Policy governs the access confined processes have to files. SELinux pulseaudio policy is very flexible allowing users to setup their pulseaudio processes in as secure a method as possible.
The following process types are defined for pulseaudio:
Note: semanage permissive -a pulseaudio_t can be used to make the process type pulseaudio_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
SELinux policy is customizable based on least access required. pulseaudio policy is extremely flexible and has several booleans that allow you to manipulate the policy and run pulseaudio with the tightest access possible.
If you want to deny all system processes and Linux users to use bluetooth wireless technology, you must turn on the deny_bluetooth boolean. Disabled by default.
setsebool -P deny_bluetooth 1
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
If you want to allow regular users direct dri device access, you must turn on the selinuxuser_direct_dri_enabled boolean. Enabled by default.
setsebool -P selinuxuser_direct_dri_enabled 1
If you want to support NFS home directories, you must turn on the use_nfs_home_dirs boolean. Disabled by default.
setsebool -P use_nfs_home_dirs 1
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
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
SELinux defines port types to represent TCP and UDP ports.
You can see the types associated with a port by using the following command:
semanage port -l
Policy governs the access confined processes have to these ports. SELinux pulseaudio policy is very flexible allowing users to setup their pulseaudio processes in as secure a method as possible.
The following port types are defined for pulseaudio:
Default Defined Ports: tcp 4713 udp 4713
The SELinux process type pulseaudio_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.
all user tmp files
SELinux requires files to have an extended attribute to define the file type.
You can see the context of a file using the -Z option to lsbP
Policy governs the access confined processes have to these files. SELinux pulseaudio policy is very flexible allowing users to setup their pulseaudio processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the pulseaudio, 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 pulseaudio_exec_t '/srv/pulseaudio/content(/.*)?'
restorecon -R -v /srv/mypulseaudio_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for pulseaudio:
- Set files with the pulseaudio_exec_t type, if you want to transition an executable to the pulseaudio_t domain.
- Set files with the pulseaudio_home_t type, if you want to store pulseaudio files in the users home directory.
/root/.pulse(/.*)?, /root/.config/pulse(/.*)?, /root/.esd_auth, /root/.pulse-cookie, /home/[^/]+/.pulse(/.*)?, /home/[^/]+/.config/pulse(/.*)?, /home/[^/]+/.esd_auth, /home/[^/]+/.pulse-cookie
- Set files with the pulseaudio_tmpfs_t type, if you want to store pulseaudio files on a tmpfs file system.
- Set files with the pulseaudio_var_lib_t type, if you want to store the pulseaudio files under the /var/lib directory.
- Set files with the pulseaudio_var_run_t type, if you want to store the pulseaudio files under the /run or /var/run directory.
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.
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 port can also be used to manipulate the port definitions
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux policy settings.
This manual page was auto-generated using sepolicy manpage .
selinux(8), pulseaudio(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)