1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
|
## <summary>MIT Kerberos admin and KDC</summary>
## <desc>
## <p>
## This policy supports:
## </p>
## <p>
## Servers:
## <ul>
## <li>kadmind</li>
## <li>krb5kdc</li>
## </ul>
## </p>
## <p>
## Clients:
## <ul>
## <li>kinit</li>
## <li>kdestroy</li>
## <li>klist</li>
## <li>ksu (incomplete)</li>
## </ul>
## </p>
## </desc>
########################################
## <summary>
## Execute kadmind in the current domain
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`kerberos_exec_kadmind',`
gen_require(`
type kadmind_exec_t;
')
can_exec($1, kadmind_exec_t)
')
########################################
## <summary>
## Execute a domain transition to run kpropd.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
#
interface(`kerberos_domtrans_kpropd',`
gen_require(`
type kpropd_t, kpropd_exec_t;
')
domtrans_pattern($1, kpropd_exec_t, kpropd_t)
')
########################################
## <summary>
## Use kerberos services
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`kerberos_use',`
gen_require(`
type krb5_conf_t, krb5kdc_conf_t;
type krb5_host_rcache_t;
')
files_search_etc($1)
read_files_pattern($1, krb5_conf_t, krb5_conf_t)
dontaudit $1 krb5_conf_t:file write;
dontaudit $1 krb5kdc_conf_t:dir list_dir_perms;
dontaudit $1 krb5kdc_conf_t:file rw_file_perms;
#kerberos libraries are attempting to set the correct file context
dontaudit $1 self:process setfscreate;
selinux_dontaudit_validate_context($1)
seutil_dontaudit_read_file_contexts($1)
tunable_policy(`allow_kerberos',`
allow $1 self:tcp_socket create_socket_perms;
allow $1 self:udp_socket create_socket_perms;
corenet_all_recvfrom_unlabeled($1)
corenet_all_recvfrom_netlabel($1)
corenet_tcp_sendrecv_generic_if($1)
corenet_udp_sendrecv_generic_if($1)
corenet_tcp_sendrecv_generic_node($1)
corenet_udp_sendrecv_generic_node($1)
corenet_tcp_sendrecv_kerberos_port($1)
corenet_udp_sendrecv_kerberos_port($1)
corenet_tcp_bind_generic_node($1)
corenet_udp_bind_generic_node($1)
corenet_tcp_connect_kerberos_port($1)
corenet_tcp_connect_ocsp_port($1)
corenet_sendrecv_kerberos_client_packets($1)
corenet_sendrecv_ocsp_client_packets($1)
allow $1 krb5_host_rcache_t:file getattr;
')
optional_policy(`
tunable_policy(`allow_kerberos',`
pcscd_stream_connect($1)
')
')
optional_policy(`
sssd_read_public_files($1)
')
')
########################################
## <summary>
## Read the kerberos configuration file (/etc/krb5.conf).
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`kerberos_read_config',`
gen_require(`
type krb5_conf_t, krb5_home_t;
')
files_search_etc($1)
allow $1 krb5_conf_t:file read_file_perms;
allow $1 krb5_home_t:file read_file_perms;
')
########################################
## <summary>
## Do not audit attempts to write the kerberos
## configuration file (/etc/krb5.conf).
## </summary>
## <param name="domain">
## <summary>
## Domain to not audit.
## </summary>
## </param>
#
interface(`kerberos_dontaudit_write_config',`
gen_require(`
type krb5_conf_t;
')
dontaudit $1 krb5_conf_t:file write;
')
########################################
## <summary>
## Read and write the kerberos configuration file (/etc/krb5.conf).
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`kerberos_rw_config',`
gen_require(`
type krb5_conf_t;
')
files_search_etc($1)
allow $1 krb5_conf_t:file rw_file_perms;
')
########################################
## <summary>
## Read the kerberos key table.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`kerberos_read_keytab',`
gen_require(`
type krb5_keytab_t;
')
files_search_etc($1)
allow $1 krb5_keytab_t:file read_file_perms;
')
########################################
## <summary>
## Read/Write the kerberos key table.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`kerberos_rw_keytab',`
gen_require(`
type krb5_keytab_t;
')
files_search_etc($1)
allow $1 krb5_keytab_t:file rw_file_perms;
')
########################################
## <summary>
## Create a derived type for kerberos keytab
## </summary>
## <param name="prefix">
## <summary>
## The prefix to be used for deriving type names.
## </summary>
## </param>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
template(`kerberos_keytab_template',`
type $1_keytab_t;
files_type($1_keytab_t)
allow $2 $1_keytab_t:file read_file_perms;
kerberos_read_keytab($2)
kerberos_use($2)
')
########################################
## <summary>
## Read the kerberos kdc configuration file (/etc/krb5kdc.conf).
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`kerberos_read_kdc_config',`
gen_require(`
type krb5kdc_conf_t;
')
files_search_etc($1)
read_files_pattern($1, krb5kdc_conf_t, krb5kdc_conf_t)
')
########################################
## <summary>
## Read the kerberos kdc configuration file (/etc/krb5kdc.conf).
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`kerberos_manage_host_rcache',`
gen_require(`
type krb5_host_rcache_t;
')
# creates files as system_u no matter what the selinux user
# cjp: should be in the below tunable but typeattribute
# does not work in conditionals
domain_obj_id_change_exemption($1)
tunable_policy(`allow_kerberos',`
allow $1 self:process setfscreate;
selinux_validate_context($1)
seutil_read_file_contexts($1)
allow $1 krb5_host_rcache_t:file manage_file_perms;
files_search_tmp($1)
')
')
########################################
## <summary>
## Create objects in generic temporary
## directories with host rcache type.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
## <param name="object_class">
## <summary>
## Class of the object being created.
## </summary>
## </param>
## <param name="name" optional="true">
## <summary>
## The name of the object being created.
## </summary>
## </param>
#
interface(`kerberos_tmp_filetrans_host_rcache',`
gen_require(`
type krb5_host_rcache_t;
')
files_tmp_filetrans($1, krb5_host_rcache_t, $2, $3)
')
########################################
## <summary>
## Connect to krb524 service
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`kerberos_connect_524',`
tunable_policy(`allow_kerberos',`
allow $1 self:udp_socket create_socket_perms;
corenet_all_recvfrom_unlabeled($1)
corenet_udp_sendrecv_generic_if($1)
corenet_udp_sendrecv_generic_node($1)
corenet_udp_sendrecv_kerberos_master_port($1)
corenet_sendrecv_kerberos_master_client_packets($1)
')
')
########################################
## <summary>
## All of the rules required to administrate
## an kerberos environment
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <param name="role">
## <summary>
## The role to be allowed to manage the kerberos domain.
## </summary>
## </param>
## <rolecap/>
#
interface(`kerberos_admin',`
gen_require(`
type kadmind_t, krb5kdc_t, kerberos_initrc_exec_t;
type kadmind_log_t, kadmind_tmp_t, kadmind_var_run_t;
type krb5_conf_t, krb5_keytab_t, krb5kdc_conf_t;
type krb5kdc_principal_t, krb5kdc_tmp_t;
type krb5kdc_var_run_t, krb5_host_rcache_t;
type kpropd_t;
')
allow $1 kadmind_t:process { ptrace signal_perms };
ps_process_pattern($1, kadmind_t)
allow $1 krb5kdc_t:process { ptrace signal_perms };
ps_process_pattern($1, krb5kdc_t)
allow $1 kpropd_t:process { ptrace signal_perms };
ps_process_pattern($1, kpropd_t)
init_labeled_script_domtrans($1, kerberos_initrc_exec_t)
domain_system_change_exemption($1)
role_transition $2 kerberos_initrc_exec_t system_r;
allow $2 system_r;
logging_list_logs($1)
admin_pattern($1, kadmind_log_t)
files_list_tmp($1)
admin_pattern($1, kadmind_tmp_t)
files_list_pids($1)
admin_pattern($1, kadmind_var_run_t)
admin_pattern($1, krb5_conf_t)
admin_pattern($1, krb5_host_rcache_t)
admin_pattern($1, krb5_keytab_t)
admin_pattern($1, krb5kdc_principal_t)
admin_pattern($1, krb5kdc_tmp_t)
admin_pattern($1, krb5kdc_var_run_t)
')
|
GitWeb