xserver_selinux(8) xserver SELinux Policy documentation xserver_selinux(8)NAMExserver_selinux - Security Enhanced Linux Policy for the xserver pro‐
cesses
DESCRIPTION
Security-Enhanced Linux secures the xserver processes via flexible
mandatory access control.
BOOLEANS
SELinux policy is customizable based on least access required. xserver
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run xserver with the tightest access possi‐
ble.
If you want to support X userspace object manage, you must turn on the
xserver_object_manager boolean.
setsebool -P xserver_object_manager 1
If you want to allow confined virtual guests to interact with the
xserve, you must turn on the virt_use_xserver boolean.
setsebool -P virt_use_xserver 1
If you want to allows XServer to execute writable memor, you must turn
on the allow_xserver_execmem boolean.
setsebool -P allow_xserver_execmem 1
NSSWITCH DOMAIN
If you want to allow users to login using a sssd serve for the
xserver_t, you must turn on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the
xserver_t, you must turn on the allow_kerberos boolean.
setsebool -P allow_kerberos 1
If you want to allow system to run with NI for the xserver_t, you must
turn on the allow_ypbind boolean.
setsebool -P allow_ypbind 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 xserver policy is very flexible allowing users to setup their
xserver processes in as secure a method as possible.
The following file types are defined for xserver:
xserver_exec_t
- Set files with the xserver_exec_t type, if you want to transition an
executable to the xserver_t domain.
Paths:
/usr/bin/Xair, /usr/X11R6/bin/Xwrapper, /usr/X11R6/bin/XFree86,
/etc/init.d/xfree86-common, /usr/X11R6/bin/Xorg,
/usr/X11R6/bin/Xipaq, /usr/bin/Xorg, /usr/X11R6/bin/X,
/usr/bin/Xephyr
xserver_log_t
- Set files with the xserver_log_t type, if you want to treat the data
as xserver log data, usually stored under the /var/log directory.
Paths:
/var/log/lightdm(/.*)?, /usr/var/[xgkw]dm(/.*)?,
/var/[xgk]dm(/.*)?, /var/log/nvidia-installer.log.*,
/var/log/XFree86.*, /var/log/Xorg.*
xserver_tmpfs_t
- Set files with the xserver_tmpfs_t type, if you want to store xserver
files on a tmpfs file system.
xserver_var_lib_t
- Set files with the xserver_var_lib_t type, if you want to store the
xserver files under the /var/lib directory.
xserver_var_run_t
- Set files with the xserver_var_run_t type, if you want to store the
xserver files under the /run directory.
Paths:
/var/run/xorg(/.*)?, /var/run/video.rom
Note: File context can be temporarily modified with the chcon command.
If you want to permanantly change the file context you need to use the
semanage fcontext command. This will modify the SELinux labeling data‐
base. 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 xserver policy is very flexible allowing users to setup their
xserver processes in as secure a method as possible.
The following port types are defined for xserver:
xserver_port_t
Default Defined Ports:
tcp 6000-6020
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
xserver policy is very flexible allowing users to setup their xserver
processes in as secure a method as possible.
The following process types are defined for xserver:
xserver_t
Note: semanage permissive -a PROCESS_TYPE can be used to make a process
type permissive. Permissive process types are not denied access by
SELinux. AVC messages will still be generated.
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 pol‐
icy 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 pol‐
icy settings.
AUTHOR
This manual page was autogenerated by genman.py.
SEE ALSOselinux(8), xserver(8), semanage(8), restorecon(8), chcon(1) , setse‐
bool(8)dwalsh@redhat.com xserver xserver_selinux(8)
