chfn_selinux(8)

1chfn_selinux(8)               SELinux Policy chfn              chfn_selinux(8)
2
3
4

NAME

6       chfn_selinux - Security Enhanced Linux Policy for the chfn processes
7

DESCRIPTION

9       Security-Enhanced  Linux secures the chfn processes via flexible manda‐
10       tory access control.
11
12       The chfn processes execute with the chfn_t SELinux type. You can  check
13       if  you  have  these processes running by executing the ps command with
14       the -Z qualifier.
15
16       For example:
17
18       ps -eZ | grep chfn_t
19
20
21

ENTRYPOINTS

23       The chfn_t SELinux type can be entered via the chfn_exec_t file type.
24
25       The default entrypoint paths for the chfn_t domain are the following:
26
27       /usr/bin/chfn, /usr/bin/chsh
28

PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
32
33       You can see the context of a process using the -Z option to ps
34
35       Policy  governs  the  access confined processes have to files.  SELinux
36       chfn policy is very flexible allowing users to setup  their  chfn  pro‐
37       cesses in as secure a method as possible.
38
39       The following process types are defined for chfn:
40
41       chfn_t
42
43       Note:  semanage  permissive  -a  chfn_t can be used to make the process
44       type chfn_t permissive. SELinux does  not  deny  access  to  permissive
45       process  types, but the AVC (SELinux denials) messages are still gener‐
46       ated.
47
48

BOOLEANS

50       SELinux policy is customizable based on least  access  required.   chfn
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run chfn with the tightest access possible.
53
54
55
56       If you want to allow users to resolve user passwd entries directly from
57       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
58       gin_nsswitch_use_ldap boolean. Disabled by default.
59
60       setsebool -P authlogin_nsswitch_use_ldap 1
61
62
63
64       If you want to deny any process from ptracing or  debugging  any  other
65       processes,  you  must  turn  on  the  deny_ptrace  boolean.  Enabled by
66       default.
67
68       setsebool -P deny_ptrace 1
69
70
71
72       If you want to allow any process  to  mmap  any  file  on  system  with
73       attribute  file_type,  you must turn on the domain_can_mmap_files bool‐
74       ean. Enabled by default.
75
76       setsebool -P domain_can_mmap_files 1
77
78
79
80       If you want to allow all domains write to kmsg_device, while kernel  is
81       executed  with  systemd.log_target=kmsg parameter, you must turn on the
82       domain_can_write_kmsg boolean. Disabled by default.
83
84       setsebool -P domain_can_write_kmsg 1
85
86
87
88       If you want to allow all domains to use other domains file descriptors,
89       you must turn on the domain_fd_use boolean. Enabled by default.
90
91       setsebool -P domain_fd_use 1
92
93
94
95       If  you  want to allow all domains to have the kernel load modules, you
96       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
97       default.
98
99       setsebool -P domain_kernel_load_modules 1
100
101
102
103       If you want to allow all domains to execute in fips_mode, you must turn
104       on the fips_mode boolean. Enabled by default.
105
106       setsebool -P fips_mode 1
107
108
109
110       If you want to enable reading of urandom for all domains, you must turn
111       on the global_ssp boolean. Disabled by default.
112
113       setsebool -P global_ssp 1
114
115
116
117       If  you  want  to allow confined applications to run with kerberos, you
118       must turn on the kerberos_enabled boolean. Enabled by default.
119
120       setsebool -P kerberos_enabled 1
121
122
123
124       If you want to allow system to run with  NIS,  you  must  turn  on  the
125       nis_enabled boolean. Disabled by default.
126
127       setsebool -P nis_enabled 1
128
129
130
131       If  you  want to allow confined applications to use nscd shared memory,
132       you must turn on the nscd_use_shm boolean. Disabled by default.
133
134       setsebool -P nscd_use_shm 1
135
136
137

MANAGED FILES

139       The SELinux process type chfn_t can manage files labeled with the  fol‐
140       lowing  file  types.   The paths listed are the default paths for these
141       file types.  Note the processes UID still need to have DAC permissions.
142
143       faillog_t
144
145            /var/log/btmp.*
146            /var/log/faillog.*
147            /var/log/tallylog.*
148            /var/run/faillock(/.*)?
149
150       krb5_host_rcache_t
151
152            /var/cache/krb5rcache(/.*)?
153            /var/tmp/nfs_0
154            /var/tmp/DNS_25
155            /var/tmp/host_0
156            /var/tmp/imap_0
157            /var/tmp/HTTP_23
158            /var/tmp/HTTP_48
159            /var/tmp/ldap_55
160            /var/tmp/ldap_487
161            /var/tmp/ldapmap1_0
162
163       lastlog_t
164
165            /var/log/lastlog.*
166
167       passwd_file_t
168
169            /etc/group[-+]?
170            /etc/passwd[-+]?
171            /etc/passwd.adjunct.*
172            /etc/ptmptmp
173            /etc/.pwd.lock
174            /etc/group.lock
175            /etc/passwd.OLD
176            /etc/passwd.lock
177
178       security_t
179
180            /selinux
181
182       user_tmp_t
183
184            /dev/shm/mono.*
185            /var/run/user(/.*)?
186            /tmp/.X11-unix(/.*)?
187            /tmp/.ICE-unix(/.*)?
188            /dev/shm/pulse-shm.*
189            /tmp/.X0-lock
190            /tmp/hsperfdata_root
191            /var/tmp/hsperfdata_root
192            /home/[^/]+/tmp
193            /home/[^/]+/.tmp
194            /tmp/gconfd-[^/]+
195
196

FILE CONTEXTS

198       SELinux requires files to have an extended attribute to define the file
199       type.
200
201       You can see the context of a file using the -Z option to ls
202
203       Policy  governs  the  access  confined  processes  have to these files.
204       SELinux chfn policy is very flexible allowing users to setup their chfn
205       processes in as secure a method as possible.
206
207       The following file types are defined for chfn:
208
209
210
211       chfn_exec_t
212
213       -  Set  files  with  the chfn_exec_t type, if you want to transition an
214       executable to the chfn_t domain.
215
216
217       Paths:
218            /usr/bin/chfn, /usr/bin/chsh
219
220
221       Note: File context can be temporarily modified with the chcon  command.
222       If  you want to permanently change the file context you need to use the
223       semanage fcontext command.  This will modify the SELinux labeling data‐
224       base.  You will need to use restorecon to apply the labels.
225
226

COMMANDS

228       semanage  fcontext  can also be used to manipulate default file context
229       mappings.
230
231       semanage permissive can also be used to manipulate  whether  or  not  a
232       process type is permissive.
233
234       semanage  module can also be used to enable/disable/install/remove pol‐
235       icy modules.
236
237       semanage boolean can also be used to manipulate the booleans
238
239
240       system-config-selinux is a GUI tool available to customize SELinux pol‐
241       icy settings.
242
243

AUTHOR

245       This manual page was auto-generated using sepolicy manpage .
246
247