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 allow all domains to execute in fips_mode, you must turn
71       on the fips_mode boolean. Enabled by default.
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73       setsebool -P fips_mode 1
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77       If  you  want  to control the ability to mmap a low area of the address
78       space, as configured by /proc/sys/vm/mmap_min_addr, you  must  turn  on
79       the mmap_low_allowed boolean. Disabled by default.
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81       setsebool -P mmap_low_allowed 1
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85       If  you  want  to  disable  kernel module loading, you must turn on the
86       secure_mode_insmod boolean. Enabled by default.
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88       setsebool -P secure_mode_insmod 1
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92       If you want to allow unconfined executables to make their  heap  memory
93       executable.   Doing  this  is  a  really bad idea. Probably indicates a
94       badly coded executable, but could indicate an attack.  This  executable
95       should   be   reported  in  bugzilla,  you  must  turn  on  the  selin‐
96       uxuser_execheap boolean. Disabled by default.
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98       setsebool -P selinuxuser_execheap 1
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102       If you want to allow unconfined executables to make  their  stack  exe‐
103       cutable.   This  should  never, ever be necessary. Probably indicates a
104       badly coded executable, but could indicate an attack.  This  executable
105       should  be reported in bugzilla, you must turn on the selinuxuser_exec‐
106       stack boolean. Enabled by default.
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108       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

113       The SELinux process type xdm_unconfined_t can manage files labeled with
114       the  following  file types.  The paths listed are the default paths for
115       these file types.  Note the processes UID still need to have  DAC  per‐
116       missions.
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118       file_type
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120            all files on the system
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FILE CONTEXTS

124       SELinux requires files to have an extended attribute to define the file
125       type.
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127       You can see the context of a file using the -Z option to ls
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129       Policy governs the access  confined  processes  have  to  these  files.
130       SELinux  xdm_unconfined policy is very flexible allowing users to setup
131       their xdm_unconfined processes in as secure a method as possible.
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133       The following file types are defined for xdm_unconfined:
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137       xdm_unconfined_exec_t
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139       - Set files with the xdm_unconfined_exec_t type, if you want to transi‐
140       tion an executable to the xdm_unconfined_t domain.
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143       Paths:
144            /etc/[mg]dm/Init(/.*)?,               /etc/[mg]dm/PostLogin(/.*)?,
145            /etc/[mg]dm/PreSession(/.*)?, /etc/[mg]dm/PostSession(/.*)?
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148       Note: File context can be temporarily modified with the chcon  command.
149       If  you want to permanently change the file context you need to use the
150       semanage fcontext command.  This will modify the SELinux labeling data‐
151       base.  You will need to use restorecon to apply the labels.
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COMMANDS

155       semanage  fcontext  can also be used to manipulate default file context
156       mappings.
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158       semanage permissive can also be used to manipulate  whether  or  not  a
159       process type is permissive.
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161       semanage  module can also be used to enable/disable/install/remove pol‐
162       icy modules.
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164       semanage boolean can also be used to manipulate the booleans
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167       system-config-selinux is a GUI tool available to customize SELinux pol‐
168       icy settings.
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AUTHOR

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