xdm_unconfined_selinux(8)

1xdm_unconfined_selinux(8)SELinux Policy xdm_unconfinedxdm_unconfined_selinux(8)
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NAME

6       xdm_unconfined_selinux   -  Security  Enhanced  Linux  Policy  for  the
7       xdm_unconfined processes
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DESCRIPTION

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

24       The  xdm_unconfined_t  SELinux  type  can be entered via the xdm_uncon‐
25       fined_exec_t file type.
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27       The default entrypoint paths for the xdm_unconfined_t  domain  are  the
28       following:
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30       /etc/[mg]dm/Init(/.*)?,  /etc/[mg]dm/PostLogin(/.*)?,  /etc/[mg]dm/Pre‐
31       Session(/.*)?, /etc/[mg]dm/PostSession(/.*)?
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PROCESS TYPES

34       SELinux defines process types (domains) for each process running on the
35       system
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37       You can see the context of a process using the -Z option to ps
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39       Policy  governs  the  access confined processes have to files.  SELinux
40       xdm_unconfined policy is very flexible allowing users  to  setup  their
41       xdm_unconfined processes in as secure a method as possible.
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43       The following process types are defined for xdm_unconfined:
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45       xdm_unconfined_t
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47       Note:  semanage  permissive -a xdm_unconfined_t can be used to make the
48       process type xdm_unconfined_t permissive. SELinux does not deny  access
49       to permissive process types, but the AVC (SELinux denials) messages are
50       still generated.
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BOOLEANS

54       SELinux  policy  is  customizable  based  on  least  access   required.
55       xdm_unconfined  policy  is  extremely flexible and has several booleans
56       that allow you to manipulate the policy and run xdm_unconfined with the
57       tightest access possible.
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61       If you want to deny user domains applications to map a memory region as
62       both executable and writable, this  is  dangerous  and  the  executable
63       should be reported in bugzilla, you must turn on the deny_execmem bool‐
64       ean. Enabled by default.
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66       setsebool -P deny_execmem 1
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70       If you want to deny any process from ptracing or  debugging  any  other
71       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
72       default.
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74       setsebool -P deny_ptrace 1
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78       If you want to allow any process  to  mmap  any  file  on  system  with
79       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
80       ean. Enabled by default.
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82       setsebool -P domain_can_mmap_files 1
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86       If you want to allow all domains write to kmsg_device, while kernel  is
87       executed  with  systemd.log_target=kmsg parameter, you must turn on the
88       domain_can_write_kmsg boolean. Disabled by default.
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90       setsebool -P domain_can_write_kmsg 1
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94       If you want to allow all domains to use other domains file descriptors,
95       you must turn on the domain_fd_use boolean. Enabled by default.
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97       setsebool -P domain_fd_use 1
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101       If  you  want to allow all domains to have the kernel load modules, you
102       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
103       default.
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105       setsebool -P domain_kernel_load_modules 1
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109       If you want to allow all domains to execute in fips_mode, you must turn
110       on the fips_mode boolean. Enabled by default.
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112       setsebool -P fips_mode 1
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116       If you want to enable reading of urandom for all domains, you must turn
117       on the global_ssp boolean. Disabled by default.
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119       setsebool -P global_ssp 1
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123       If  you  want  to control the ability to mmap a low area of the address
124       space, as configured by /proc/sys/vm/mmap_min_addr, you  must  turn  on
125       the mmap_low_allowed boolean. Disabled by default.
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127       setsebool -P mmap_low_allowed 1
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131       If  you  want  to  disable  kernel module loading, you must turn on the
132       secure_mode_insmod boolean. Enabled by default.
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134       setsebool -P secure_mode_insmod 1
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138       If you want to boolean to determine whether the system permits  loading
139       policy,  setting enforcing mode, and changing boolean values.  Set this
140       to true and you have to reboot to set it back, you  must  turn  on  the
141       secure_mode_policyload boolean. Enabled by default.
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143       setsebool -P secure_mode_policyload 1
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147       If  you  want to allow unconfined executables to make their heap memory
148       executable.  Doing this is a really  bad  idea.  Probably  indicates  a
149       badly  coded  executable, but could indicate an attack. This executable
150       should  be  reported  in  bugzilla,  you  must  turn  on   the   selin‐
151       uxuser_execheap boolean. Disabled by default.
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153       setsebool -P selinuxuser_execheap 1
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157       If  you  want  to  allow  all  unconfined  executables to use libraries
158       requiring text relocation that are  not  labeled  textrel_shlib_t,  you
159       must turn on the selinuxuser_execmod boolean. Enabled by default.
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161       setsebool -P selinuxuser_execmod 1
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165       If  you  want  to allow unconfined executables to make their stack exe‐
166       cutable.  This should never, ever be necessary.  Probably  indicates  a
167       badly  coded  executable, but could indicate an attack. This executable
168       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
169       stack boolean. Enabled by default.
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171       setsebool -P selinuxuser_execstack 1
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175       If you want to support X userspace object manager, you must turn on the
176       xserver_object_manager boolean. Enabled by default.
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178       setsebool -P xserver_object_manager 1
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MANAGED FILES

183       The SELinux process type xdm_unconfined_t can manage files labeled with
184       the  following  file types.  The paths listed are the default paths for
185       these file types.  Note the processes UID still need to have  DAC  per‐
186       missions.
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188       file_type
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190            all files on the system
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FILE CONTEXTS

194       SELinux requires files to have an extended attribute to define the file
195       type.
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197       You can see the context of a file using the -Z option to ls
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199       Policy governs the access  confined  processes  have  to  these  files.
200       SELinux  xdm_unconfined policy is very flexible allowing users to setup
201       their xdm_unconfined processes in as secure a method as possible.
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203       The following file types are defined for xdm_unconfined:
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207       xdm_unconfined_exec_t
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209       - Set files with the xdm_unconfined_exec_t type, if you want to transi‐
210       tion an executable to the xdm_unconfined_t domain.
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213       Paths:
214            /etc/[mg]dm/Init(/.*)?,               /etc/[mg]dm/PostLogin(/.*)?,
215            /etc/[mg]dm/PreSession(/.*)?, /etc/[mg]dm/PostSession(/.*)?
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217
218       Note: File context can be temporarily modified with the chcon  command.
219       If  you want to permanently change the file context you need to use the
220       semanage fcontext command.  This will modify the SELinux labeling data‐
221       base.  You will need to use restorecon to apply the labels.
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COMMANDS

225       semanage  fcontext  can also be used to manipulate default file context
226       mappings.
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228       semanage permissive can also be used to manipulate  whether  or  not  a
229       process type is permissive.
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231       semanage  module can also be used to enable/disable/install/remove pol‐
232       icy modules.
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234       semanage boolean can also be used to manipulate the booleans
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237       system-config-selinux is a GUI tool available to customize SELinux pol‐
238       icy settings.
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AUTHOR

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