1cloud_init_selinux(8)      SELinux Policy cloud_init     cloud_init_selinux(8)
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NAME

6       cloud_init_selinux  - Security Enhanced Linux Policy for the cloud_init
7       processes
8

DESCRIPTION

10       Security-Enhanced Linux secures the cloud_init processes  via  flexible
11       mandatory access control.
12
13       The  cloud_init  processes  execute with the cloud_init_t SELinux type.
14       You can check if you have these processes running by executing  the  ps
15       command with the -Z qualifier.
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17       For example:
18
19       ps -eZ | grep cloud_init_t
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ENTRYPOINTS

24       The  cloud_init_t SELinux type can be entered via the cloud_init_exec_t
25       file type.
26
27       The default entrypoint paths for the cloud_init_t domain are  the  fol‐
28       lowing:
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30       /usr/lib/systemd/system-generators/cloud-init.*,   /usr/bin/cloud-init,
31       /usr/libexec/min-cloud-agent, /usr/libexec/min-metadata-service
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       cloud_init policy is  very  flexible  allowing  users  to  setup  their
41       cloud_init processes in as secure a method as possible.
42
43       The following process types are defined for cloud_init:
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45       cloud_init_t
46
47       Note:  semanage  permissive  -a  cloud_init_t  can  be used to make the
48       process type cloud_init_t permissive. SELinux does not deny  access  to
49       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       cloud_init  policy  is extremely flexible and has several booleans that
56       allow you to manipulate the policy and run cloud_init with the tightest
57       access possible.
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61       If  you  want  to  dontaudit all daemons scheduling requests (setsched,
62       sys_nice), you must turn on the  daemons_dontaudit_scheduling  boolean.
63       Enabled by default.
64
65       setsebool -P daemons_dontaudit_scheduling 1
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68
69       If you want to deny user domains applications to map a memory region as
70       both executable and writable, this  is  dangerous  and  the  executable
71       should be reported in bugzilla, you must turn on the deny_execmem bool‐
72       ean. Disabled by default.
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74       setsebool -P deny_execmem 1
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77
78       If you want to control the ability to mmap a low area  of  the  address
79       space,  as  configured  by /proc/sys/vm/mmap_min_addr, you must turn on
80       the mmap_low_allowed boolean. Disabled by default.
81
82       setsebool -P mmap_low_allowed 1
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84
85
86       If you want to allow system to run with  NIS,  you  must  turn  on  the
87       nis_enabled boolean. Disabled by default.
88
89       setsebool -P nis_enabled 1
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91
92
93       If  you want to disable kernel module loading, you must turn on the se‐
94       cure_mode_insmod boolean. Disabled by default.
95
96       setsebool -P secure_mode_insmod 1
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98
99
100       If you want to allow unconfined executables to make their  heap  memory
101       executable.   Doing  this  is  a  really bad idea. Probably indicates a
102       badly coded executable, but could indicate an attack.  This  executable
103       should  be  reported  in bugzilla, you must turn on the selinuxuser_ex‐
104       echeap boolean. Disabled by default.
105
106       setsebool -P selinuxuser_execheap 1
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108
109
110       If you want to allow unconfined executables to make  their  stack  exe‐
111       cutable.   This  should  never, ever be necessary. Probably indicates a
112       badly coded executable, but could indicate an attack.  This  executable
113       should  be reported in bugzilla, you must turn on the selinuxuser_exec‐
114       stack boolean. Enabled by default.
115
116       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

121       The SELinux process type cloud_init_t can manage files labeled with the
122       following file types.  The paths listed are the default paths for these
123       file types.  Note the processes UID still need to have DAC permissions.
124
125       file_type
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127            all files on the system
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129

FILE CONTEXTS

131       SELinux requires files to have an extended attribute to define the file
132       type.
133
134       You can see the context of a file using the -Z option to ls
135
136       Policy  governs  the  access  confined  processes  have to these files.
137       SELinux cloud_init policy is very  flexible  allowing  users  to  setup
138       their cloud_init processes in as secure a method as possible.
139
140       STANDARD FILE CONTEXT
141
142       SELinux  defines  the  file  context  types  for the cloud_init, if you
143       wanted to store files with these types in a different paths,  you  need
144       to  execute the semanage command to specify alternate labeling and then
145       use restorecon to put the labels on disk.
146
147       semanage  fcontext  -a   -t   cloud_init_exec_t   '/srv/cloud_init/con‐
148       tent(/.*)?'
149       restorecon -R -v /srv/mycloud_init_content
150
151       Note:  SELinux  often  uses  regular expressions to specify labels that
152       match multiple files.
153
154       The following file types are defined for cloud_init:
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158       cloud_init_exec_t
159
160       - Set files with the cloud_init_exec_t type, if you want to  transition
161       an executable to the cloud_init_t domain.
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163
164       Paths:
165            /usr/lib/systemd/system-generators/cloud-init.*,   /usr/bin/cloud-
166            init, /usr/libexec/min-cloud-agent, /usr/libexec/min-metadata-ser‐
167            vice
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169
170       cloud_init_tmp_t
171
172       -  Set files with the cloud_init_tmp_t type, if you want to store cloud
173       init temporary files in the /tmp directories.
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177       cloud_init_unit_file_t
178
179       - Set files with the cloud_init_unit_file_t type, if you want to  treat
180       the files as cloud init unit content.
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182
183       Paths:
184            /usr/lib/systemd/system/cloud-init.*,        /usr/lib/systemd/sys‐
185            tem/cloud-config.*
186
187
188       Note: File context can be temporarily modified with the chcon  command.
189       If  you want to permanently change the file context you need to use the
190       semanage fcontext command.  This will modify the SELinux labeling data‐
191       base.  You will need to use restorecon to apply the labels.
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193

COMMANDS

195       semanage  fcontext  can also be used to manipulate default file context
196       mappings.
197
198       semanage permissive can also be used to manipulate  whether  or  not  a
199       process type is permissive.
200
201       semanage  module can also be used to enable/disable/install/remove pol‐
202       icy modules.
203
204       semanage boolean can also be used to manipulate the booleans
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206
207       system-config-selinux is a GUI tool available to customize SELinux pol‐
208       icy settings.
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210

AUTHOR

212       This manual page was auto-generated using sepolicy manpage .
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SEE ALSO

216       selinux(8), cloud_init(8), semanage(8), restorecon(8), chcon(1), sepol‐
217       icy(8), setsebool(8)
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221cloud_init                         23-10-20              cloud_init_selinux(8)
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