xguest_selinux(8)

1xguest_selinux(8)     xguest SELinux Policy documentation    xguest_selinux(8)
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NAME

6       xguest_u  -  Least  privileged  xwindows user role. - Security Enhanced
7       Linux Policy
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DESCRIPTION

11       xguest_u is an SELinux User defined  in  the  SELinux  policy.  SELinux
12       users  have  default  roles,  xguest_r.  The default role has a default
13       type, xguest_t, associated with it.
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15       The SELinux user will usually login to a system  with  a  context  that
16       looks like:
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18       xguest_u:xguest_r:xguest_t:s0
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20       Linux  users  are  automatically  assigned  an  SELinux users at login.
21       Login programs use the SELinux User to assign initial  context  to  the
22       user's shell.
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24       SELinux policy uses the context to control the user's access.
25
26       By  default  all  users  are  assigned  to  the  SELinux  user  via the
27       __default__ flag
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29       On Targeted policy systems the __default__  user  is  assigned  to  the
30       unconfined_u SELinux user.
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32       You can list all Linux User to SELinux user mapping using:
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34       semanage login -l
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36       If  you  wanted  to change the default user mapping to use the xguest_u
37       user, you would execute:
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39       semanage login -m -s xguest_u __default__
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41
42       If you want to map the one Linux user (joe) to the SELinux user xguest,
43       you would execute:
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45       $ semanage login -a -s xguest_u joe
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USER DESCRIPTION

50       The  SELinux user xguest_u is defined in policy as a unprivileged user.
51       SELinux prevents unprivileged users  from  doing  administration  tasks
52       without transitioning to a different role.
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SUDO

X WINDOWS LOGIN

57       The SELinux user xguest_u is able to X Windows login.
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NETWORK

61       The SELinux user xguest_u is able to listen on the following tcp ports.
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63              32768-61000
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65              all ports with out defined types
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68       The  SELinux  user  xguest_u  is  able  to connect to the following tcp
69       ports.
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71              8955
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73              53,853
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75              4713
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77              4331,5001
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79              80,81,443,488,8008,8009,8443,9000
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81              8080,8118,8123,10001-10010
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83              3128,3401,4827
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85              843,1935
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87              21,989,990
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89              631,8610-8614
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91              32768-61000
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93              all ports with out defined types
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95              8000,9433,16001
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97              8036
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99              8081
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101              389,636,3268,3269,7389
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103              111
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105              all ports < 1024
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107              88,750,4444
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109              9080
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112       The SELinux user xguest_u is able to listen on the following udp ports.
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114              32768-61000
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116              all ports with out defined types
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119       The SELinux user xguest_u is able  to  connect  to  the  following  tcp
120       ports.
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122              8955
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124              53,853
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126              4713
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128              4331,5001
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130              80,81,443,488,8008,8009,8443,9000
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132              8080,8118,8123,10001-10010
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134              3128,3401,4827
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136              843,1935
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138              21,989,990
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140              631,8610-8614
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142              32768-61000
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144              all ports with out defined types
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146              8000,9433,16001
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148              8036
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150              8081
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152              389,636,3268,3269,7389
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154              111
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156              all ports < 1024
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158              88,750,4444
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160              9080
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BOOLEANS

164       SELinux  policy is customizable based on least access required.  xguest
165       policy is extremely flexible and has several booleans that allow you to
166       manipulate the policy and run xguest with the tightest access possible.
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170       If you want to allow xguest users to configure Network Manager and con‐
171       nect to apache ports, you must turn on the xguest_connect_network bool‐
172       ean. Enabled by default.
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174       setsebool -P xguest_connect_network 1
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178       If  you  want  to allow xguest users to mount removable media, you must
179       turn on the xguest_mount_media boolean. Enabled by default.
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181       setsebool -P xguest_mount_media 1
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185       If you want to allow xguest to use blue tooth devices, you must turn on
186       the xguest_use_bluetooth boolean. Enabled by default.
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188       setsebool -P xguest_use_bluetooth 1
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192       If you want to allow users to resolve user passwd entries directly from
193       ldap rather then using a sssd server, you  must  turn  on  the  authlo‐
194       gin_nsswitch_use_ldap boolean. Disabled by default.
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196       setsebool -P authlogin_nsswitch_use_ldap 1
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200       If you want to deny user domains applications to map a memory region as
201       both executable and writable, this  is  dangerous  and  the  executable
202       should be reported in bugzilla, you must turn on the deny_execmem bool‐
203       ean. Enabled by default.
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205       setsebool -P deny_execmem 1
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209       If you want to deny any process from ptracing or  debugging  any  other
210       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
211       default.
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213       setsebool -P deny_ptrace 1
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217       If you want to allow all domains to execute in fips_mode, you must turn
218       on the fips_mode boolean. Enabled by default.
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220       setsebool -P fips_mode 1
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224       If  you  want  to  allow  httpd  cgi  support,  you  must  turn  on the
225       httpd_enable_cgi boolean. Enabled by default.
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227       setsebool -P httpd_enable_cgi 1
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231       If you want to allow confined applications to run  with  kerberos,  you
232       must turn on the kerberos_enabled boolean. Enabled by default.
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234       setsebool -P kerberos_enabled 1
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238       If  you  want  to  allow  system  to run with NIS, you must turn on the
239       nis_enabled boolean. Disabled by default.
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241       setsebool -P nis_enabled 1
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245       If you want to allow confined applications to use nscd  shared  memory,
246       you must turn on the nscd_use_shm boolean. Enabled by default.
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248       setsebool -P nscd_use_shm 1
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252       If  you  want  to allow unconfined executables to make their stack exe‐
253       cutable.  This should never, ever be necessary.  Probably  indicates  a
254       badly  coded  executable, but could indicate an attack. This executable
255       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
256       stack boolean. Enabled by default.
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258       setsebool -P selinuxuser_execstack 1
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262       If  you want to allow user to r/w files on filesystems that do not have
263       extended attributes (FAT, CDROM, FLOPPY), you must turn on  the  selin‐
264       uxuser_rw_noexattrfile boolean. Enabled by default.
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266       setsebool -P selinuxuser_rw_noexattrfile 1
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270       If you want to allow user  to use ssh chroot environment, you must turn
271       on the selinuxuser_use_ssh_chroot boolean. Disabled by default.
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273       setsebool -P selinuxuser_use_ssh_chroot 1
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277       If you want to support NFS home  directories,  you  must  turn  on  the
278       use_nfs_home_dirs boolean. Disabled by default.
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280       setsebool -P use_nfs_home_dirs 1
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284       If  you  want  to  support SAMBA home directories, you must turn on the
285       use_samba_home_dirs boolean. Disabled by default.
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287       setsebool -P use_samba_home_dirs 1
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HOME_EXEC

292       The SELinux user xguest_u is able execute home content files.
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TRANSITIONS

296       Three things can happen when xguest_t attempts to execute a program.
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298       1. SELinux Policy can deny xguest_t from executing the program.
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302       2. SELinux Policy can allow xguest_t to execute the program in the cur‐
303       rent user type.
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305              Execute  the  following  to  see the types that the SELinux user
306              xguest_t can execute without transitioning:
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308              sesearch -A -s xguest_t -c file -p execute_no_trans
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312       3. SELinux can allow xguest_t to execute the program and transition  to
313       a new type.
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315              Execute  the  following  to  see the types that the SELinux user
316              xguest_t can execute and transition:
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318              $ sesearch -A -s xguest_t -c process -p transition
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MANAGED FILES

323       The SELinux process type xguest_t can manage  files  labeled  with  the
324       following file types.  The paths listed are the default paths for these
325       file types.  Note the processes UID still need to have DAC permissions.
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327       alsa_home_t
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329            /home/[^/]+/.asoundrc
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331       anon_inodefs_t
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334       auth_cache_t
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336            /var/cache/coolkey(/.*)?
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338       chrome_sandbox_tmpfs_t
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341       cifs_t
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344       dosfs_t
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347       gconf_tmp_t
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349            /tmp/gconfd-[^/]+/.*
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351       gkeyringd_tmp_t
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353            /var/run/user/[^/]*/keyring.*
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355       gnome_home_type
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358       httpd_user_content_t
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360            /home/[^/]+/((www)|(web)|(public_html))(/.+)?
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362       httpd_user_htaccess_t
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364            /home/[^/]+/((www)|(web)|(public_html))(/.*)?/.htaccess
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366       httpd_user_ra_content_t
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368            /home/[^/]+/((www)|(web)|(public_html))(/.*)?/logs(/.*)?
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370       httpd_user_rw_content_t
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373       httpd_user_script_exec_t
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375            /home/[^/]+/((www)|(web)|(public_html))/cgi-bin(/.+)?
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377       nfs_t
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380       noxattrfs
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382            all files on file systems which do not support extended attributes
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384       pulseaudio_tmpfs_t
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387       pulseaudio_tmpfsfile
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389
390       usbfs_t
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393       user_fonts_cache_t
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395            /root/.fontconfig(/.*)?
396            /root/.fonts/auto(/.*)?
397            /root/.fonts.cache-.*
398            /home/[^/]+/.fontconfig(/.*)?
399            /home/[^/]+/.fonts/auto(/.*)?
400            /home/[^/]+/.fonts.cache-.*
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402       user_home_type
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404            all user home files
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406       user_tmp_t
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408            /dev/shm/mono.*
409            /var/run/user(/.*)?
410            /tmp/.ICE-unix(/.*)?
411            /tmp/.X11-unix(/.*)?
412            /dev/shm/pulse-shm.*
413            /tmp/.X0-lock
414            /tmp/hsperfdata_root
415            /var/tmp/hsperfdata_root
416            /home/[^/]+/tmp
417            /home/[^/]+/.tmp
418            /tmp/gconfd-[^/]+
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420       user_tmp_type
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422            all user tmp files
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424       xserver_tmpfs_t
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COMMANDS

429       semanage fcontext can also be used to manipulate default  file  context
430       mappings.
431
432       semanage  permissive  can  also  be used to manipulate whether or not a
433       process type is permissive.
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435       semanage module can also be used to enable/disable/install/remove  pol‐
436       icy modules.
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438       semanage boolean can also be used to manipulate the booleans
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441       system-config-selinux is a GUI tool available to customize SELinux pol‐
442       icy settings.
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AUTHOR

446       This manual page was auto-generated using sepolicy manpage .
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