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 xdm_un‐
7       confined 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.  xdm_un‐
55       confined policy is extremely flexible and has several booleans that al‐
56       low you to manipulate the policy and run xdm_unconfined with the tight‐
57       est 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 control the ability to mmap a low area  of  the  address
71       space,  as  configured  by /proc/sys/vm/mmap_min_addr, you must turn on
72       the mmap_low_allowed boolean. Disabled by default.
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74       setsebool -P mmap_low_allowed 1
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78       If you want to disable kernel module loading, you must turn on the  se‐
79       cure_mode_insmod boolean. Enabled by default.
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81       setsebool -P secure_mode_insmod 1
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85       If  you  want to allow unconfined executables to make their heap memory
86       executable.  Doing this is a really  bad  idea.  Probably  indicates  a
87       badly  coded  executable, but could indicate an attack. This executable
88       should be reported in bugzilla, you must turn  on  the  selinuxuser_ex‐
89       echeap boolean. Disabled by default.
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91       setsebool -P selinuxuser_execheap 1
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95       If  you  want  to allow unconfined executables to make their stack exe‐
96       cutable.  This should never, ever be necessary.  Probably  indicates  a
97       badly  coded  executable, but could indicate an attack. This executable
98       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
99       stack boolean. Enabled by default.
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101       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

106       The SELinux process type xdm_unconfined_t can manage files labeled with
107       the following file types.  The paths listed are the default  paths  for
108       these  file  types.  Note the processes UID still need to have DAC per‐
109       missions.
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111       file_type
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113            all files on the system
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FILE CONTEXTS

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

148       semanage fcontext can also be used to manipulate default  file  context
149       mappings.
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151       semanage  permissive  can  also  be used to manipulate whether or not a
152       process type is permissive.
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154       semanage module can also be used to enable/disable/install/remove  pol‐
155       icy modules.
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157       semanage boolean can also be used to manipulate the booleans
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160       system-config-selinux is a GUI tool available to customize SELinux pol‐
161       icy settings.
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AUTHOR

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