mpd_selinux(8) - Linux man page

Name

mpd_selinux - Security Enhanced Linux Policy for the mpd processes

Description

Security-Enhanced Linux secures the mpd processes via flexible mandatory access control.

The mpd processes execute with the mpd_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 mpd_t

Entrypoints

The mpd_t SELinux type can be entered via the "mpd_exec_t" file type. The default entrypoint paths for the mpd_t domain are the following:"

/usr/bin/mpd

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

The following process types are defined for mpd:

mpd_t, mplayer_t

Note: semanage permissive -a mpd_t

can be used to make the process type mpd_t permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.

Booleans

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

If you want to allow gssd to read temp directory. For access to kerberos tgt, you must turn on the allow_gssd_read_tmp boolean.

setsebool -P allow_gssd_read_tmp 1

If you want to allow mplayer executable stack, you must turn on the allow_mplayer_execstack boolean.

setsebool -P allow_mplayer_execstack 1

If you want to allow all daemons to write corefiles to /, you must turn on the allow_daemons_dump_core boolean.

setsebool -P allow_daemons_dump_core 1

If you want to allow Apache to execute tmp content, you must turn on the httpd_tmp_exec boolean.

setsebool -P httpd_tmp_exec 1

If you want to allow gssd to read temp directory. For access to kerberos tgt, you must turn on the allow_gssd_read_tmp boolean.

setsebool -P allow_gssd_read_tmp 1

If you want to allow mplayer executable stack, you must turn on the allow_mplayer_execstack boolean.

setsebool -P allow_mplayer_execstack 1

If you want to allow all daemons to write corefiles to /, you must turn on the allow_daemons_dump_core boolean.

setsebool -P allow_daemons_dump_core 1

If you want to allow Apache to execute tmp content, you must turn on the httpd_tmp_exec boolean.

setsebool -P httpd_tmp_exec 1

File Contexts

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 ls

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

The following file types are defined for mpd:

mpd_data_t

- Set files with the mpd_data_t type, if you want to treat the files as mpd content.

mpd_etc_t

- Set files with the mpd_etc_t type, if you want to store mpd files in the /etc directories.

mpd_exec_t

- Set files with the mpd_exec_t type, if you want to transition an executable to the mpd_t domain.

mpd_initrc_exec_t

- Set files with the mpd_initrc_exec_t type, if you want to transition an executable to the mpd_initrc_t domain.

mpd_log_t

- Set files with the mpd_log_t type, if you want to treat the data as mpd log data, usually stored under the /var/log directory.

mpd_tmp_t

- Set files with the mpd_tmp_t type, if you want to store mpd temporary files in the /tmp directories.

mpd_tmpfs_t

- Set files with the mpd_tmpfs_t type, if you want to store mpd files on a tmpfs file system.

mpd_var_lib_t

- Set files with the mpd_var_lib_t type, if you want to store the mpd files under the /var/lib 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.

Port Types

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

The following port types are defined for mpd:

mpd_port_t
Default Defined Ports:: tcp 6600

Managed Files

The SELinux process type mpd_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.

anon_inodefs_t

initrc_tmp_t

mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

mpd_data_t

/var/lib/mpd/music(/.*)?

/var/lib/mpd/playlists(/.*)?

mpd_tmp_t
mpd_tmpfs_t
mpd_var_lib_t

/var/lib/mpd(/.*)?

root_t

/initrd

tmp_t

/tmp

/usr/tmp

/var/tmp

/var/tmp/vi.recover

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 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.

Author

This manual page was auto-generated using sepolicy manpage by mgrepl.