1sandbox_xserver_selinux(8S)ELinux Policy sandbox_xservesrandbox_xserver_selinux(8)
2
6 sandbox_xserver_selinux - Security Enhanced Linux Policy for the sand‐
7 box_xserver processes
8
10 Security-Enhanced Linux secures the sandbox_xserver processes via flex‐
11 ible mandatory access control.
12 The sandbox_xserver processes execute with the sandbox_xserver_t
14 SELinux type. You can check if you have these processes running by exe‐
15 cuting the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep sandbox_xserver_t
20
24 The sandbox_xserver_t SELinux type can be entered via the
25 xserver_exec_t file type.
26 The default entrypoint paths for the sandbox_xserver_t domain are the
28 following:
29 /usr/bin/nvidia.*, /usr/bin/Xair, /usr/bin/Xorg, /usr/bin/Xvnc,
31 /usr/bin/Xephyr, /usr/bin/x11vnc, /usr/X11R6/bin/X,
32 /usr/X11R6/bin/Xorg, /usr/X11R6/bin/Xipaq, /usr/libexec/Xorg.bin,
33 /usr/X11R6/bin/XFree86, /usr/libexec/Xorg.wrap, /usr/X11R6/bin/Xwrap‐
34 per, /usr/libexec/gsd-backlight-helper
35
37 SELinux defines process types (domains) for each process running on the
38 system
39 You can see the context of a process using the -Z option to ps
41 Policy governs the access confined processes have to files. SELinux
43 sandbox_xserver policy is very flexible allowing users to setup their
44 sandbox_xserver processes in as secure a method as possible.
45 The following process types are defined for sandbox_xserver:
47 sandbox_xserver_t
49 Note: semanage permissive -a sandbox_xserver_t can be used to make the
51 process type sandbox_xserver_t permissive. SELinux does not deny access
52 to permissive process types, but the AVC (SELinux denials) messages are
53 still generated.
54
57 SELinux policy is customizable based on least access required. sand‐
58 box_xserver policy is extremely flexible and has several booleans that
59 allow you to manipulate the policy and run sandbox_xserver with the
60 tightest access possible.
61 If you want to allow users to resolve user passwd entries directly from
65 ldap rather then using a sssd server, you must turn on the authlo‐
66 gin_nsswitch_use_ldap boolean. Disabled by default.
67 setsebool -P authlogin_nsswitch_use_ldap 1
69 If you want to deny user domains applications to map a memory region as
73 both executable and writable, this is dangerous and the executable
74 should be reported in bugzilla, you must turn on the deny_execmem bool‐
75 ean. Enabled by default.
76 setsebool -P deny_execmem 1
78 If you want to allow all domains to execute in fips_mode, you must turn
82 on the fips_mode boolean. Enabled by default.
83 setsebool -P fips_mode 1
85 If you want to allow confined applications to run with kerberos, you
89 must turn on the kerberos_enabled boolean. Disabled by default.
90 setsebool -P kerberos_enabled 1
92 If you want to allow system to run with NIS, you must turn on the
96 nis_enabled boolean. Disabled by default.
97 setsebool -P nis_enabled 1
99 If you want to allow confined applications to use nscd shared memory,
103 you must turn on the nscd_use_shm boolean. Disabled by default.
104 setsebool -P nscd_use_shm 1
106 If you want to allow regular users direct dri device access, you must
110 turn on the selinuxuser_direct_dri_enabled boolean. Disabled by
111 default.
112 setsebool -P selinuxuser_direct_dri_enabled 1
114 If you want to support fusefs home directories, you must turn on the
118 use_fusefs_home_dirs boolean. Disabled by default.
119 setsebool -P use_fusefs_home_dirs 1
121 If you want to support NFS home directories, you must turn on the
125 use_nfs_home_dirs boolean. Enabled by default.
126 setsebool -P use_nfs_home_dirs 1
128 If you want to support SAMBA home directories, you must turn on the
132 use_samba_home_dirs boolean. Disabled by default.
133 setsebool -P use_samba_home_dirs 1
135 If you want to allows clients to write to the X server shared memory
139 segments, you must turn on the xserver_clients_write_xshm boolean. Dis‐
140 abled by default.
141 setsebool -P xserver_clients_write_xshm 1
143
147 The SELinux process type sandbox_xserver_t can manage files labeled
148 with the following file types. The paths listed are the default paths
149 for these file types. Note the processes UID still need to have DAC
150 permissions.
151 sandbox_file_t
153 sandbox_xserver_tmpfs_t
156 security_t
159 /selinux
161 user_fonts_cache_t
163 /root/.fontconfig(/.*)?
165 /root/.fonts/auto(/.*)?
166 /root/.fonts.cache-.*
167 /root/.cache/fontconfig(/.*)?
168 /home/[^/]+/.fontconfig(/.*)?
169 /home/[^/]+/.fonts/auto(/.*)?
170 /home/[^/]+/.fonts.cache-.*
171 /home/[^/]+/.cache/fontconfig(/.*)?
172 user_tmp_t
174 /dev/shm/mono.*
176 /var/run/user(/.*)?
177 /tmp/.ICE-unix(/.*)?
178 /tmp/.X11-unix(/.*)?
179 /dev/shm/pulse-shm.*
180 /tmp/.X0-lock
181 /tmp/hsperfdata_root
182 /var/tmp/hsperfdata_root
183 /home/[^/]+/tmp
184 /home/[^/]+/.tmp
185 /tmp/gconfd-[^/]+
186 xserver_tmpfs_t
188
192 semanage fcontext can also be used to manipulate default file context
193 mappings.
194 semanage permissive can also be used to manipulate whether or not a
196 process type is permissive.
197 semanage module can also be used to enable/disable/install/remove pol‐
199 icy modules.
200 semanage boolean can also be used to manipulate the booleans
202 system-config-selinux is a GUI tool available to customize SELinux pol‐
205 icy settings.
206
209 This manual page was auto-generated using sepolicy manpage .
210
213 selinux(8), sandbox_xserver(8), semanage(8), restorecon(8), chcon(1),
214 sepolicy(8), setsebool(8)
215sandbox_xserver 19-12-02 sandbox_xserver_selinux(8)