useradd_selinux(8)

1useradd_selinux(8)          SELinux Policy useradd          useradd_selinux(8)
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NAME

6       useradd_selinux  -  Security Enhanced Linux Policy for the useradd pro‐
7       cesses
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DESCRIPTION

10       Security-Enhanced Linux secures  the  useradd  processes  via  flexible
11       mandatory access control.
12
13       The  useradd processes execute with the useradd_t SELinux type. You can
14       check if you have these processes running by executing the  ps  command
15       with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep useradd_t
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ENTRYPOINTS

24       The  useradd_t  SELinux  type  can  be entered via the file_type, unla‐
25       beled_t,  proc_type,  user_home_t,   filesystem_type,   useradd_exec_t,
26       mtrr_device_t, sysctl_type file types.
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28       The  default  entrypoint paths for the useradd_t domain are the follow‐
29       ing:
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31       all   files   on   the    system,    /home/[^/]*/.+,    /home/staff/.+,
32       /usr/sbin/useradd, /usr/sbin/userdel, /usr/sbin/usermod, /dev/cpu/mtrr
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PROCESS TYPES

35       SELinux defines process types (domains) for each process running on the
36       system
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38       You can see the context of a process using the -Z option to ps
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40       Policy governs the access confined processes have  to  files.   SELinux
41       useradd  policy  is very flexible allowing users to setup their useradd
42       processes in as secure a method as possible.
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44       The following process types are defined for useradd:
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46       useradd_t
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48       Note: semanage permissive -a useradd_t can be used to make the  process
49       type  useradd_t  permissive. SELinux does not deny access to permissive
50       process types, but the AVC (SELinux denials) messages are still  gener‐
51       ated.
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BOOLEANS

55       SELinux policy is customizable based on least access required.  useradd
56       policy is extremely flexible and has several booleans that allow you to
57       manipulate  the  policy and run useradd with the tightest access possi‐
58       ble.
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62       If you want to allow all daemons the ability to  read/write  terminals,
63       you  must  turn  on  the  allow_daemons_use_tty  boolean.  Disabled  by
64       default.
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66       setsebool -P allow_daemons_use_tty 1
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70       If you want to allow all domains to use other domains file descriptors,
71       you must turn on the allow_domain_fd_use boolean. Enabled by default.
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73       setsebool -P allow_domain_fd_use 1
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77       If  you  want to allow unconfined executables to make their heap memory
78       executable.  Doing this is a really  bad  idea.  Probably  indicates  a
79       badly  coded  executable, but could indicate an attack. This executable
80       should be reported in bugzilla, you must  turn  on  the  allow_execheap
81       boolean. Disabled by default.
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83       setsebool -P allow_execheap 1
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87       If  you  want to allow unconfined executables to map a memory region as
88       both executable and writable, this  is  dangerous  and  the  executable
89       should  be  reported  in  bugzilla), you must turn on the allow_execmem
90       boolean. Enabled by default.
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92       setsebool -P allow_execmem 1
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96       If you want to  allow  all  unconfined  executables  to  use  libraries
97       requiring  text  relocation  that are not labeled textrel_shlib_t), you
98       must turn on the allow_execmod boolean. Enabled by default.
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100       setsebool -P allow_execmod 1
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103
104       If you want to allow unconfined executables to make  their  stack  exe‐
105       cutable.   This  should  never, ever be necessary. Probably indicates a
106       badly coded executable, but could indicate an attack.  This  executable
107       should  be  reported in bugzilla), you must turn on the allow_execstack
108       boolean. Enabled by default.
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110       setsebool -P allow_execstack 1
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114       If you want to allow confined applications to run  with  kerberos,  you
115       must turn on the allow_kerberos boolean. Enabled by default.
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117       setsebool -P allow_kerberos 1
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121       If  you want to allow sysadm to debug or ptrace all processes, you must
122       turn on the allow_ptrace boolean. Disabled by default.
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124       setsebool -P allow_ptrace 1
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128       If you want to allow system to run with  NIS,  you  must  turn  on  the
129       allow_ypbind boolean. Disabled by default.
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131       setsebool -P allow_ypbind 1
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135       If  you  want to allow all domains to have the kernel load modules, you
136       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
137       default.
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139       setsebool -P domain_kernel_load_modules 1
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143       If you want to allow all domains to execute in fips_mode, you must turn
144       on the fips_mode boolean. Enabled by default.
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146       setsebool -P fips_mode 1
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150       If you want to enable reading of urandom for all domains, you must turn
151       on the global_ssp boolean. Disabled by default.
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153       setsebool -P global_ssp 1
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157       If  you  want to allow certain domains to map low memory in the kernel,
158       you must turn on the mmap_low_allowed boolean. Disabled by default.
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160       setsebool -P mmap_low_allowed 1
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163
164       If you want to allow confined applications to use nscd  shared  memory,
165       you must turn on the nscd_use_shm boolean. Enabled by default.
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167       setsebool -P nscd_use_shm 1
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171       If  you want to allow samba to act as the domain controller, add users,
172       groups and change passwords, you must  turn  on  the  samba_domain_con‐
173       troller boolean. Disabled by default.
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175       setsebool -P samba_domain_controller 1
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179       If  you want to boolean to determine whether the system permits loading
180       policy, setting enforcing mode, and changing boolean values.  Set  this
181       to  true  and  you  have to reboot to set it back, you must turn on the
182       secure_mode_policyload boolean. Disabled by default.
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184       setsebool -P secure_mode_policyload 1
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188       If you want to support NFS home  directories,  you  must  turn  on  the
189       use_nfs_home_dirs boolean. Disabled by default.
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191       setsebool -P use_nfs_home_dirs 1
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195       If  you  want  to  support SAMBA home directories, you must turn on the
196       use_samba_home_dirs boolean. Disabled by default.
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198       setsebool -P use_samba_home_dirs 1
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202       If you want to support X userspace object manager, you must turn on the
203       xserver_object_manager boolean. Disabled by default.
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205       setsebool -P xserver_object_manager 1
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MANAGED FILES

210       The  SELinux  process  type useradd_t can manage files labeled with the
211       following file types.  The paths listed are the default paths for these
212       file types.  Note the processes UID still need to have DAC permissions.
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214       file_type
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216            all files on the system
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FILE CONTEXTS

220       SELinux requires files to have an extended attribute to define the file
221       type.
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223       You can see the context of a file using the -Z option to ls
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225       Policy governs the access  confined  processes  have  to  these  files.
226       SELinux  useradd  policy is very flexible allowing users to setup their
227       useradd processes in as secure a method as possible.
228
229       The following file types are defined for useradd:
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233       useradd_exec_t
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235       - Set files with the useradd_exec_t type, if you want to transition  an
236       executable to the useradd_t domain.
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239       Paths:
240            /usr/sbin/useradd, /usr/sbin/userdel, /usr/sbin/usermod
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243       Note:  File context can be temporarily modified with the chcon command.
244       If you want to permanently change the file context you need to use  the
245       semanage fcontext command.  This will modify the SELinux labeling data‐
246       base.  You will need to use restorecon to apply the labels.
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COMMANDS

250       semanage fcontext can also be used to manipulate default  file  context
251       mappings.
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253       semanage  permissive  can  also  be used to manipulate whether or not a
254       process type is permissive.
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256       semanage module can also be used to enable/disable/install/remove  pol‐
257       icy modules.
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259       semanage boolean can also be used to manipulate the booleans
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262       system-config-selinux is a GUI tool available to customize SELinux pol‐
263       icy settings.
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AUTHOR

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