xdm_unconfined_selinux(8)

1xdm_unconfined_selinux(8)SELinux Policy xdm_unconfinedxdm_unconfined_selinux(8)
2
3
4

NAME

6       xdm_unconfined_selinux   -  Security  Enhanced  Linux  Policy  for  the
7       xdm_unconfined processes
8

DESCRIPTION

10       Security-Enhanced Linux secures the xdm_unconfined processes via flexi‐
11       ble mandatory access control.
12
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.
16
17       For example:
18
19       ps -eZ | grep xdm_unconfined_t
20
21
22

ENTRYPOINTS

24       The  xdm_unconfined_t  SELinux  type  can be entered via the xdm_uncon‐
25       fined_exec_t file type.
26
27       The default entrypoint paths for the xdm_unconfined_t  domain  are  the
28       following:
29
30       /etc/[mg]dm/Init(/.*)?,  /etc/[mg]dm/PostLogin(/.*)?,  /etc/[mg]dm/Pre‐
31       Session(/.*)?, /etc/[mg]dm/PostSession(/.*)?
32

PROCESS TYPES

34       SELinux defines process types (domains) for each process running on the
35       system
36
37       You can see the context of a process using the -Z option to ps
38
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.
42
43       The following process types are defined for xdm_unconfined:
44
45       xdm_unconfined_t
46
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.
51
52

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.
58
59
60
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.
65
66       setsebool -P deny_execmem 1
67
68
69
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.
73
74       setsebool -P mmap_low_allowed 1
75
76
77
78       If you want to disable kernel module loading,  you  must  turn  on  the
79       secure_mode_insmod boolean. Enabled by default.
80
81       setsebool -P secure_mode_insmod 1
82
83
84
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   selin‐
89       uxuser_execheap boolean. Disabled by default.
90
91       setsebool -P selinuxuser_execheap 1
92
93
94
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. Disabled by default.
100
101       setsebool -P selinuxuser_execstack 1
102
103
104

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.
110
111       file_type
112
113            all files on the system
114
115

FILE CONTEXTS

117       SELinux requires files to have an extended attribute to define the file
118       type.
119
120       You can see the context of a file using the -Z option to ls
121
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.
125
126       The following file types are defined for xdm_unconfined:
127
128
129
130       xdm_unconfined_exec_t
131
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.
134
135
136       Paths:
137            /etc/[mg]dm/Init(/.*)?,               /etc/[mg]dm/PostLogin(/.*)?,
138            /etc/[mg]dm/PreSession(/.*)?, /etc/[mg]dm/PostSession(/.*)?
139
140
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.
145
146

COMMANDS

148       semanage fcontext can also be used to manipulate default  file  context
149       mappings.
150
151       semanage  permissive  can  also  be used to manipulate whether or not a
152       process type is permissive.
153
154       semanage module can also be used to enable/disable/install/remove  pol‐
155       icy modules.
156
157       semanage boolean can also be used to manipulate the booleans
158
159
160       system-config-selinux is a GUI tool available to customize SELinux pol‐
161       icy settings.
162
163

AUTHOR

165       This manual page was auto-generated using sepolicy manpage .
166
167