1user_selinux(8) user SELinux Policy documentation user_selinux(8)
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6 user_u - Generic unprivileged user - Security Enhanced Linux Policy
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10 user_u is an SELinux User defined in the SELinux policy. SELinux users
11 have default roles, user_r. The default role has a default type,
12 user_t, associated with it.
13 The SELinux user will usually login to a system with a context that
15 looks like:
16 user_u:user_r:user_t:s0
18 Linux users are automatically assigned an SELinux users at login.
20 Login programs use the SELinux User to assign initial context to the
21 user's shell.
22 SELinux policy uses the context to control the user's access.
24 By default all users are assigned to the SELinux user via the
26 __default__ flag
27 On Targeted policy systems the __default__ user is assigned to the
29 unconfined_u SELinux user.
30 You can list all Linux User to SELinux user mapping using:
32 semanage login -l
34 If you wanted to change the default user mapping to use the user_u
36 user, you would execute:
37 semanage login -m -s user_u __default__
39 If you want to map the one Linux user (joe) to the SELinux user user,
42 you would execute:
43 $ semanage login -a -s user_u joe
45
49 The SELinux user user_u is defined in policy as a unprivileged user.
50 SELinux prevents unprivileged users from doing administration tasks
51 without transitioning to a different role.
52
56 The SELinux user user_u is able to X Windows login.
57
60 The SELinux user user_u is able to listen on the following tcp ports.
61 6000-6020
63 3689
65 all ports >= 1024
67 all ports without defined types
69 32768-60999
71 The SELinux user user_u is able to connect to the following tcp ports.
74 8955
76 53,853
78 all ports
80 389,636,3268,3269,7389
82 all ports without defined types
84 32768-60999
86 all ports < 1024
88 9080
90 88,750,4444
92 The SELinux user user_u is able to listen on the following udp ports.
95 32768-60999
97 all ports without defined types
99 all ports >= 1024
101 The SELinux user user_u is able to connect to the following tcp ports.
104 8955
106 53,853
108 all ports
110 389,636,3268,3269,7389
112 all ports without defined types
114 32768-60999
116 all ports < 1024
118 9080
120 88,750,4444
122
125 SELinux policy is customizable based on least access required. user
126 policy is extremely flexible and has several booleans that allow you to
127 manipulate the policy and run user with the tightest access possible.
128 If you want to determine whether crond can execute jobs in the user
132 domain as opposed to the the generic cronjob domain, you must turn on
133 the cron_userdomain_transition boolean. Enabled by default.
134 setsebool -P cron_userdomain_transition 1
136 If you want to deny all system processes and Linux users to use blue‐
140 tooth wireless technology, you must turn on the deny_bluetooth boolean.
141 Enabled by default.
142 setsebool -P deny_bluetooth 1
144 If you want to deny user domains applications to map a memory region as
148 both executable and writable, this is dangerous and the executable
149 should be reported in bugzilla, you must turn on the deny_execmem bool‐
150 ean. Enabled by default.
151 setsebool -P deny_execmem 1
153 If you want to deny any process from ptracing or debugging any other
157 processes, you must turn on the deny_ptrace boolean. Enabled by
158 default.
159 setsebool -P deny_ptrace 1
161 If you want to allow all domains to execute in fips_mode, you must turn
165 on the fips_mode boolean. Enabled by default.
166 setsebool -P fips_mode 1
168 If you want to determine whether calling user domains can execute Git
172 daemon in the git_session_t domain, you must turn on the git_ses‐
173 sion_users boolean. Disabled by default.
174 setsebool -P git_session_users 1
176 If you want to allow httpd cgi support, you must turn on the
180 httpd_enable_cgi boolean. Enabled by default.
181 setsebool -P httpd_enable_cgi 1
183 If you want to determine whether calling user domains can execute
187 Polipo daemon in the polipo_session_t domain, you must turn on the
188 polipo_session_users boolean. Disabled by default.
189 setsebool -P polipo_session_users 1
191 If you want to allow pppd to be run for a regular user, you must turn
195 on the pppd_for_user boolean. Disabled by default.
196 setsebool -P pppd_for_user 1
198 If you want to allow all unconfined executables to use libraries
202 requiring text relocation that are not labeled textrel_shlib_t, you
203 must turn on the selinuxuser_execmod boolean. Disabled by default.
204 setsebool -P selinuxuser_execmod 1
206 If you want to allow unconfined executables to make their stack exe‐
210 cutable. This should never, ever be necessary. Probably indicates a
211 badly coded executable, but could indicate an attack. This executable
212 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
213 stack boolean. Disabled by default.
214 setsebool -P selinuxuser_execstack 1
216 If you want to allow users to connect to the local mysql server, you
220 must turn on the selinuxuser_mysql_connect_enabled boolean. Disabled by
221 default.
222 setsebool -P selinuxuser_mysql_connect_enabled 1
224 If you want to allow confined users the ability to execute the ping and
228 traceroute commands, you must turn on the selinuxuser_ping boolean.
229 Disabled by default.
230 setsebool -P selinuxuser_ping 1
232 If you want to allow user to r/w files on filesystems that do not have
236 extended attributes (FAT, CDROM, FLOPPY), you must turn on the selin‐
237 uxuser_rw_noexattrfile boolean. Enabled by default.
238 setsebool -P selinuxuser_rw_noexattrfile 1
240 If you want to allow unprivileged user to create and transition to
244 svirt domains, you must turn on the unprivuser_use_svirt boolean. Dis‐
245 abled by default.
246 setsebool -P unprivuser_use_svirt 1
248 If you want to support NFS home directories, you must turn on the
252 use_nfs_home_dirs boolean. Enabled by default.
253 setsebool -P use_nfs_home_dirs 1
255 If you want to support SAMBA home directories, you must turn on the
259 use_samba_home_dirs boolean. Disabled by default.
260 setsebool -P use_samba_home_dirs 1
262
266 The SELinux user user_u is able execute home content files.
267
270 Three things can happen when user_t attempts to execute a program.
271 1. SELinux Policy can deny user_t from executing the program.
273 2. SELinux Policy can allow user_t to execute the program in the cur‐
277 rent user type.
278 Execute the following to see the types that the SELinux user
280 user_t can execute without transitioning:
281 sesearch -A -s user_t -c file -p execute_no_trans
283 3. SELinux can allow user_t to execute the program and transition to a
287 new type.
288 Execute the following to see the types that the SELinux user
290 user_t can execute and transition:
291 $ sesearch -A -s user_t -c process -p transition
293
297 The SELinux process type user_t can manage files labeled with the fol‐
298 lowing file types. The paths listed are the default paths for these
299 file types. Note the processes UID still need to have DAC permissions.
300 alsa_home_t
302 /home/[^/]+/.asoundrc
304 anon_inodefs_t
306 auth_cache_t
309 /var/cache/coolkey(/.*)?
311 cgroup_t
313 /sys/fs/cgroup
315 chrome_sandbox_tmpfs_t
317 faillog_t
320 /var/log/btmp.*
322 /var/log/faillog.*
323 /var/log/tallylog.*
324 /var/run/faillock(/.*)?
325 games_data_t
327 /var/games(/.*)?
329 /var/lib/games(/.*)?
330 httpd_user_content_t
332 /home/[^/]+/((www)|(web)|(public_html))(/.+)?
334 httpd_user_htaccess_t
336 /home/[^/]+/((www)|(web)|(public_html))(/.*)?/.htaccess
338 httpd_user_ra_content_t
340 /home/[^/]+/((www)|(web)|(public_html))(/.*)?/logs(/.*)?
342 httpd_user_rw_content_t
344 httpd_user_script_exec_t
347 /home/[^/]+/((www)|(web)|(public_html))/cgi-bin(/.+)?
349 mail_spool_t
351 /var/mail(/.*)?
353 /var/spool/imap(/.*)?
354 /var/spool/mail(/.*)?
355 /var/spool/smtpd(/.*)?
356 mqueue_spool_t
358 /var/spool/(client)?mqueue(/.*)?
360 /var/spool/mqueue.in(/.*)?
361 pulseaudio_tmpfsfile
363 sandbox_tmpfs_type
366 all sandbox content in tmpfs file systems
368 security_t
370 /selinux
372 systemd_passwd_var_run_t
374 /var/run/systemd/ask-password(/.*)?
376 /var/run/systemd/ask-password-block(/.*)?
377 usbfs_t
379 user_fonts_cache_t
382 /root/.fontconfig(/.*)?
384 /root/.fonts/auto(/.*)?
385 /root/.fonts.cache-.*
386 /root/.cache/fontconfig(/.*)?
387 /home/[^/]+/.fontconfig(/.*)?
388 /home/[^/]+/.fonts/auto(/.*)?
389 /home/[^/]+/.fonts.cache-.*
390 /home/[^/]+/.cache/fontconfig(/.*)?
391 var_auth_t
393 /var/ace(/.*)?
395 /var/rsa(/.*)?
396 /var/lib/abl(/.*)?
397 /var/lib/rsa(/.*)?
398 /var/lib/pam_ssh(/.*)?
399 /var/lib/pam_shield(/.*)?
400 /var/opt/quest/vas/vasd(/.*)?
401 /var/lib/google-authenticator(/.*)?
402 virt_image_type
404 all virtual image files
406
409 semanage fcontext can also be used to manipulate default file context
410 mappings.
411 semanage permissive can also be used to manipulate whether or not a
413 process type is permissive.
414 semanage module can also be used to enable/disable/install/remove pol‐
416 icy modules.
417 semanage boolean can also be used to manipulate the booleans
419 system-config-selinux is a GUI tool available to customize SELinux pol‐
422 icy settings.
423
426 This manual page was auto-generated using sepolicy manpage .
427
430 selinux(8), user(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
431 setsebool(8), user_dbusd_selinux(8), user_dbusd_selinux(8),
432 user_gkeyringd_selinux(8), user_gkeyringd_selinux(8),
433 user_mail_selinux(8), user_mail_selinux(8), user_screen_selinux(8),
434 user_screen_selinux(8), user_seunshare_selinux(8), user_seun‐
435 share_selinux(8), user_ssh_agent_selinux(8), user_ssh_agent_selinux(8),
436 user_wine_selinux(8), user_wine_selinux(8)
437mgrepl@redhat.com user user_selinux(8)