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Commit | Line | Data |
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29af4c13 | 1 | policy_module(ssh, 2.2.0) |
0404a390 CP |
2 | |
3 | ######################################## | |
4 | # | |
5 | # Declarations | |
6 | # | |
7 | ||
56e1b3d2 | 8 | ## <desc> |
1e2abee1 DG |
9 | ## <p> |
10 | ## allow host key based authentication | |
11 | ## </p> | |
56e1b3d2 | 12 | ## </desc> |
0bfccda4 | 13 | gen_tunable(allow_ssh_keysign, false) |
56e1b3d2 CP |
14 | |
15 | ## <desc> | |
1e2abee1 DG |
16 | ## <p> |
17 | ## Allow ssh logins as sysadm_r:sysadm_t | |
18 | ## </p> | |
56e1b3d2 | 19 | ## </desc> |
0bfccda4 | 20 | gen_tunable(ssh_sysadm_login, false) |
56e1b3d2 | 21 | |
3eaa9939 | 22 | ## <desc> |
1e2abee1 DG |
23 | ## <p> |
24 | ## allow sshd to forward port connections | |
25 | ## </p> | |
3eaa9939 DW |
26 | ## </desc> |
27 | gen_tunable(sshd_forward_ports, false) | |
28 | ||
45239964 | 29 | attribute ssh_server; |
296273a7 | 30 | attribute ssh_agent_type; |
0404a390 | 31 | |
75beb950 | 32 | type ssh_keygen_t; |
0404a390 | 33 | type ssh_keygen_exec_t; |
0bfccda4 | 34 | init_system_domain(ssh_keygen_t, ssh_keygen_exec_t) |
0404a390 | 35 | |
e070dd2d | 36 | type sshd_exec_t; |
fb63d0b5 | 37 | corecmd_executable_file(sshd_exec_t) |
c3812748 | 38 | |
6b19be33 | 39 | ssh_server_template(sshd) |
0bfccda4 | 40 | init_daemon_domain(sshd_t, sshd_exec_t) |
6b19be33 | 41 | |
3eaa9939 DW |
42 | type sshd_initrc_exec_t; |
43 | init_script_file(sshd_initrc_exec_t) | |
44 | ||
375c2415 CP |
45 | type sshd_key_t; |
46 | files_type(sshd_key_t) | |
9ccd96df | 47 | |
296273a7 CP |
48 | type ssh_t; |
49 | type ssh_exec_t; | |
50 | typealias ssh_t alias { user_ssh_t staff_ssh_t sysadm_ssh_t }; | |
51 | typealias ssh_t alias { auditadm_ssh_t secadm_ssh_t }; | |
52 | application_domain(ssh_t, ssh_exec_t) | |
53 | ubac_constrained(ssh_t) | |
54 | ||
55 | type ssh_agent_exec_t; | |
56 | corecmd_executable_file(ssh_agent_exec_t) | |
57 | ||
58 | type ssh_agent_tmp_t; | |
59 | typealias ssh_agent_tmp_t alias { user_ssh_agent_tmp_t staff_ssh_agent_tmp_t sysadm_ssh_agent_tmp_t }; | |
60 | typealias ssh_agent_tmp_t alias { auditadm_ssh_agent_tmp_t secadm_ssh_agent_tmp_t }; | |
61 | files_tmp_file(ssh_agent_tmp_t) | |
62 | ubac_constrained(ssh_agent_tmp_t) | |
63 | ||
64 | type ssh_keysign_t; | |
65 | type ssh_keysign_exec_t; | |
66 | typealias ssh_keysign_t alias { user_ssh_keysign_t staff_ssh_keysign_t sysadm_ssh_keysign_t }; | |
67 | typealias ssh_keysign_t alias { auditadm_ssh_keysign_t secadm_ssh_keysign_t }; | |
68 | application_domain(ssh_keysign_t, ssh_keysign_exec_t) | |
69 | ubac_constrained(ssh_keysign_t) | |
70 | ||
71 | type ssh_tmpfs_t; | |
72 | typealias ssh_tmpfs_t alias { user_ssh_tmpfs_t staff_ssh_tmpfs_t sysadm_ssh_tmpfs_t }; | |
73 | typealias ssh_tmpfs_t alias { auditadm_ssh_tmpfs_t secadm_ssh_tmpfs_t }; | |
74 | files_tmpfs_file(ssh_tmpfs_t) | |
75 | ubac_constrained(ssh_tmpfs_t) | |
76 | ||
cde15072 CP |
77 | type ssh_home_t; |
78 | typealias ssh_home_t alias { home_ssh_t user_ssh_home_t user_home_ssh_t staff_home_ssh_t sysadm_home_ssh_t }; | |
79 | typealias ssh_home_t alias { auditadm_home_ssh_t secadm_home_ssh_t }; | |
cde15072 | 80 | userdom_user_home_content(ssh_home_t) |
296273a7 | 81 | |
4781493e DG |
82 | ifdef(`enable_mcs',` |
83 | init_ranged_daemon_domain(sshd_t, sshd_exec_t, s0 - mcs_systemhigh) | |
84 | ') | |
85 | ||
296273a7 CP |
86 | ############################## |
87 | # | |
88 | # SSH client local policy | |
89 | # | |
90 | ||
91 | allow ssh_t self:capability { setuid setgid dac_override dac_read_search }; | |
92 | allow ssh_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap }; | |
93 | allow ssh_t self:fd use; | |
94 | allow ssh_t self:fifo_file rw_fifo_file_perms; | |
95 | allow ssh_t self:unix_dgram_socket { create_socket_perms sendto }; | |
96 | allow ssh_t self:unix_stream_socket { create_stream_socket_perms connectto }; | |
97 | allow ssh_t self:shm create_shm_perms; | |
98 | allow ssh_t self:sem create_sem_perms; | |
99 | allow ssh_t self:msgq create_msgq_perms; | |
100 | allow ssh_t self:msg { send receive }; | |
cde15072 | 101 | allow ssh_t self:tcp_socket create_stream_socket_perms; |
296273a7 CP |
102 | |
103 | # Read the ssh key file. | |
104 | allow ssh_t sshd_key_t:file read_file_perms; | |
105 | ||
296273a7 CP |
106 | manage_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t) |
107 | manage_lnk_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t) | |
108 | manage_fifo_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t) | |
109 | manage_sock_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t) | |
cde15072 | 110 | fs_tmpfs_filetrans(ssh_t, ssh_tmpfs_t, { dir file lnk_file sock_file fifo_file }) |
296273a7 | 111 | |
edc2f7de CP |
112 | manage_dirs_pattern(ssh_t, ssh_home_t, ssh_home_t) |
113 | manage_sock_files_pattern(ssh_t, ssh_home_t, ssh_home_t) | |
114 | userdom_user_home_dir_filetrans(ssh_t, ssh_home_t, { dir sock_file }) | |
3eaa9939 | 115 | userdom_stream_connect(ssh_t) |
296273a7 CP |
116 | |
117 | # Allow the ssh program to communicate with ssh-agent. | |
118 | stream_connect_pattern(ssh_t, ssh_agent_tmp_t, ssh_agent_tmp_t, ssh_agent_type) | |
119 | ||
120 | allow ssh_t sshd_t:unix_stream_socket connectto; | |
121 | ||
122 | # ssh client can manage the keys and config | |
edc2f7de CP |
123 | manage_files_pattern(ssh_t, ssh_home_t, ssh_home_t) |
124 | read_lnk_files_pattern(ssh_t, ssh_home_t, ssh_home_t) | |
296273a7 CP |
125 | |
126 | # ssh servers can read the user keys and config | |
3eaa9939 DW |
127 | manage_dirs_pattern(ssh_server, ssh_home_t, ssh_home_t) |
128 | manage_files_pattern(ssh_server, ssh_home_t, ssh_home_t) | |
129 | userdom_user_home_dir_filetrans(ssh_server, ssh_home_t, dir) | |
130 | userdom_admin_home_dir_filetrans(ssh_server, ssh_home_t, dir) | |
296273a7 CP |
131 | |
132 | kernel_read_kernel_sysctls(ssh_t) | |
cde15072 | 133 | kernel_read_system_state(ssh_t) |
296273a7 CP |
134 | |
135 | corenet_all_recvfrom_unlabeled(ssh_t) | |
136 | corenet_all_recvfrom_netlabel(ssh_t) | |
668b3093 | 137 | corenet_tcp_sendrecv_generic_if(ssh_t) |
c1262146 | 138 | corenet_tcp_sendrecv_generic_node(ssh_t) |
296273a7 CP |
139 | corenet_tcp_sendrecv_all_ports(ssh_t) |
140 | corenet_tcp_connect_ssh_port(ssh_t) | |
141 | corenet_sendrecv_ssh_client_packets(ssh_t) | |
3eaa9939 DW |
142 | corenet_tcp_bind_generic_node(ssh_t) |
143 | corenet_tcp_bind_all_unreserved_ports(ssh_t) | |
296273a7 CP |
144 | |
145 | dev_read_urand(ssh_t) | |
146 | ||
147 | fs_getattr_all_fs(ssh_t) | |
148 | fs_search_auto_mountpoints(ssh_t) | |
149 | ||
150 | # run helper programs - needed eg for x11-ssh-askpass | |
151 | corecmd_exec_shell(ssh_t) | |
152 | corecmd_exec_bin(ssh_t) | |
153 | ||
154 | domain_use_interactive_fds(ssh_t) | |
155 | ||
156 | files_list_home(ssh_t) | |
157 | files_read_usr_files(ssh_t) | |
158 | files_read_etc_runtime_files(ssh_t) | |
159 | files_read_etc_files(ssh_t) | |
160 | files_read_var_files(ssh_t) | |
161 | ||
162 | logging_send_syslog_msg(ssh_t) | |
163 | logging_read_generic_logs(ssh_t) | |
164 | ||
cde15072 CP |
165 | auth_use_nsswitch(ssh_t) |
166 | ||
296273a7 CP |
167 | miscfiles_read_localization(ssh_t) |
168 | ||
169 | seutil_read_config(ssh_t) | |
170 | ||
296273a7 CP |
171 | userdom_dontaudit_list_user_home_dirs(ssh_t) |
172 | userdom_search_user_home_dirs(ssh_t) | |
173 | # Write to the user domain tty. | |
174 | userdom_use_user_terminals(ssh_t) | |
3eaa9939 | 175 | # needs to read krb/write tgt |
296273a7 | 176 | userdom_read_user_tmp_files(ssh_t) |
3eaa9939 DW |
177 | userdom_write_user_tmp_files(ssh_t) |
178 | userdom_read_user_home_content_symlinks(ssh_t) | |
296273a7 CP |
179 | |
180 | tunable_policy(`allow_ssh_keysign',` | |
3c4ffa32 | 181 | domtrans_pattern(ssh_t, ssh_keysign_exec_t, ssh_keysign_t) |
296273a7 CP |
182 | ') |
183 | ||
296273a7 CP |
184 | tunable_policy(`use_nfs_home_dirs',` |
185 | fs_manage_nfs_dirs(ssh_t) | |
186 | fs_manage_nfs_files(ssh_t) | |
187 | ') | |
188 | ||
189 | tunable_policy(`use_samba_home_dirs',` | |
190 | fs_manage_cifs_dirs(ssh_t) | |
191 | fs_manage_cifs_files(ssh_t) | |
192 | ') | |
193 | ||
194 | # for port forwarding | |
195 | tunable_policy(`user_tcp_server',` | |
196 | corenet_tcp_bind_ssh_port(ssh_t) | |
cde15072 | 197 | corenet_tcp_bind_generic_node(ssh_t) |
296273a7 CP |
198 | ') |
199 | ||
200 | optional_policy(` | |
201 | xserver_user_x_domain_template(ssh, ssh_t, ssh_tmpfs_t) | |
202 | xserver_domtrans_xauth(ssh_t) | |
203 | ') | |
204 | ||
3eaa9939 DW |
205 | ######################################## |
206 | # | |
207 | # ssh_keygen local policy | |
208 | # | |
209 | ||
210 | # ssh_keygen_t is the type of the ssh-keygen program when run at install time | |
211 | # and by sysadm_t | |
212 | ||
213 | dontaudit ssh_keygen_t self:capability sys_tty_config; | |
214 | allow ssh_keygen_t self:process { sigchld sigkill sigstop signull signal }; | |
3eaa9939 DW |
215 | allow ssh_keygen_t self:unix_stream_socket create_stream_socket_perms; |
216 | ||
217 | allow ssh_keygen_t sshd_key_t:file manage_file_perms; | |
218 | files_etc_filetrans(ssh_keygen_t, sshd_key_t, file) | |
219 | ||
220 | kernel_read_kernel_sysctls(ssh_keygen_t) | |
221 | ||
222 | fs_search_auto_mountpoints(ssh_keygen_t) | |
223 | ||
224 | dev_read_sysfs(ssh_keygen_t) | |
225 | dev_read_urand(ssh_keygen_t) | |
226 | ||
227 | term_dontaudit_use_console(ssh_keygen_t) | |
228 | ||
229 | domain_use_interactive_fds(ssh_keygen_t) | |
230 | ||
231 | files_read_etc_files(ssh_keygen_t) | |
232 | ||
233 | init_use_fds(ssh_keygen_t) | |
234 | init_use_script_ptys(ssh_keygen_t) | |
235 | ||
236 | logging_send_syslog_msg(ssh_keygen_t) | |
237 | ||
238 | userdom_dontaudit_use_unpriv_user_fds(ssh_keygen_t) | |
239 | ||
240 | optional_policy(` | |
241 | nscd_socket_use(ssh_keygen_t) | |
242 | ') | |
243 | ||
244 | optional_policy(` | |
245 | seutil_sigchld_newrole(ssh_keygen_t) | |
246 | ') | |
247 | ||
248 | optional_policy(` | |
249 | udev_read_db(ssh_keygen_t) | |
250 | ') | |
251 | ||
296273a7 CP |
252 | ############################## |
253 | # | |
254 | # ssh_keysign_t local policy | |
255 | # | |
256 | ||
257 | tunable_policy(`allow_ssh_keysign',` | |
258 | allow ssh_keysign_t self:capability { setgid setuid }; | |
259 | allow ssh_keysign_t self:unix_stream_socket create_socket_perms; | |
260 | ||
7d1f5642 | 261 | allow ssh_keysign_t sshd_key_t:file read_file_perms; |
296273a7 CP |
262 | |
263 | dev_read_urand(ssh_keysign_t) | |
264 | ||
265 | files_read_etc_files(ssh_keysign_t) | |
266 | ') | |
267 | ||
268 | optional_policy(` | |
269 | tunable_policy(`allow_ssh_keysign',` | |
270 | nscd_socket_use(ssh_keysign_t) | |
271 | ') | |
272 | ') | |
273 | ||
0404a390 CP |
274 | ################################# |
275 | # | |
276 | # sshd local policy | |
277 | # | |
278 | # sshd_t is the domain for the sshd program. | |
279 | # | |
280 | ||
6b19be33 CP |
281 | # so a tunnel can point to another ssh tunnel |
282 | allow sshd_t self:netlink_route_socket r_netlink_socket_perms; | |
283 | allow sshd_t self:key { search link write }; | |
3eaa9939 | 284 | allow sshd_t self:process setcurrent; |
44d5d93f | 285 | |
6b19be33 CP |
286 | kernel_search_key(sshd_t) |
287 | kernel_link_key(sshd_t) | |
288 | ||
c3c753f7 CP |
289 | term_use_all_ptys(sshd_t) |
290 | term_setattr_all_ptys(sshd_t) | |
3eaa9939 | 291 | term_setattr_all_ttys(sshd_t) |
c3c753f7 | 292 | term_relabelto_all_ptys(sshd_t) |
3eaa9939 | 293 | term_use_ptmx(sshd_t) |
296273a7 | 294 | |
6b19be33 CP |
295 | # for X forwarding |
296 | corenet_tcp_bind_xserver_port(sshd_t) | |
297 | corenet_sendrecv_xserver_server_packets(sshd_t) | |
298 | ||
3eaa9939 DW |
299 | userdom_read_user_home_content_files(sshd_t) |
300 | userdom_read_user_home_content_symlinks(sshd_t) | |
301 | userdom_search_admin_dir(sshd_t) | |
302 | userdom_manage_tmp_role(system_r, sshd_t) | |
4781493e DG |
303 | userdom_spec_domtrans_unpriv_users(sshd_t) |
304 | userdom_signal_unpriv_users(sshd_t) | |
305 | ||
306 | tunable_policy(`sshd_forward_ports',` | |
307 | corenet_tcp_bind_all_unreserved_ports(sshd_t) | |
308 | corenet_tcp_connect_all_ports(sshd_t) | |
309 | ') | |
3eaa9939 | 310 | |
6b19be33 CP |
311 | tunable_policy(`ssh_sysadm_login',` |
312 | # Relabel and access ptys created by sshd | |
313 | # ioctl is necessary for logout() processing for utmp entry and for w to | |
314 | # display the tty. | |
315 | # some versions of sshd on the new SE Linux require setattr | |
6b19be33 | 316 | userdom_signal_all_users(sshd_t) |
6b19be33 CP |
317 | ') |
318 | ||
cde15072 | 319 | optional_policy(` |
088b65e5 | 320 | daemontools_service_domain(sshd_t, sshd_exec_t) |
cde15072 CP |
321 | ') |
322 | ||
3eaa9939 DW |
323 | optional_policy(` |
324 | kerberos_keytab_template(sshd, sshd_t) | |
325 | ') | |
326 | ||
327 | optional_policy(` | |
328 | ftp_dyntrans_sftpd(sshd_t) | |
329 | ftp_dyntrans_anon_sftpd(sshd_t) | |
330 | ') | |
331 | ||
332 | optional_policy(` | |
333 | gitosis_manage_lib_files(sshd_t) | |
334 | ') | |
335 | ||
6b19be33 | 336 | optional_policy(` |
088b65e5 | 337 | inetd_tcp_service_domain(sshd_t, sshd_exec_t) |
6b19be33 CP |
338 | ') |
339 | ||
340 | optional_policy(` | |
3eaa9939 | 341 | nx_read_home_files(sshd_t) |
6b19be33 CP |
342 | ') |
343 | ||
344 | optional_policy(` | |
345 | rpm_use_script_fds(sshd_t) | |
346 | ') | |
347 | ||
348 | optional_policy(` | |
296273a7 | 349 | rssh_spec_domtrans(sshd_t) |
6b19be33 | 350 | # For reading /home/user/.ssh |
296273a7 | 351 | rssh_read_ro_content(sshd_t) |
6b19be33 CP |
352 | ') |
353 | ||
3eaa9939 DW |
354 | optional_policy(` |
355 | usermanage_domtrans_passwd(sshd_t) | |
356 | usermanage_read_crack_db(sshd_t) | |
357 | ') | |
358 | ||
350b6ab7 | 359 | optional_policy(` |
350b6ab7 CP |
360 | unconfined_shell_domtrans(sshd_t) |
361 | ') | |
362 | ||
088b65e5 CP |
363 | optional_policy(` |
364 | xserver_domtrans_xauth(sshd_t) | |
365 | ') | |
366 | ||
6b19be33 | 367 | ifdef(`TODO',` |
1e2abee1 DG |
368 | tunable_policy(`ssh_sysadm_login',` |
369 | # Relabel and access ptys created by sshd | |
370 | # ioctl is necessary for logout() processing for utmp entry and for w to | |
371 | # display the tty. | |
372 | # some versions of sshd on the new SE Linux require setattr | |
373 | allow sshd_t ptyfile:chr_file relabelto; | |
374 | ||
375 | optional_policy(` | |
376 | domain_trans(sshd_t, xauth_exec_t, userdomain) | |
377 | ') | |
378 | ',` | |
379 | optional_policy(` | |
380 | domain_trans(sshd_t, xauth_exec_t, unpriv_userdomain) | |
381 | ') | |
382 | # Relabel and access ptys created by sshd | |
383 | # ioctl is necessary for logout() processing for utmp entry and for w to | |
384 | # display the tty. | |
385 | # some versions of sshd on the new SE Linux require setattr | |
7d1f5642 | 386 | allow sshd_t userpty_type:chr_file { relabelto rw_inherited_chr_file_perms setattr_chr_file_perms }; |
5540e76a | 387 | ') |
6b19be33 | 388 | ') dnl endif TODO |
0404a390 | 389 | |
0404a390 CP |
390 | ######################################## |
391 | # | |
392 | # ssh_keygen local policy | |
393 | # | |
394 | ||
75beb950 CP |
395 | # ssh_keygen_t is the type of the ssh-keygen program when run at install time |
396 | # and by sysadm_t | |
0404a390 | 397 | |
75beb950 CP |
398 | dontaudit ssh_keygen_t self:capability sys_tty_config; |
399 | allow ssh_keygen_t self:process { sigchld sigkill sigstop signull signal }; | |
75beb950 | 400 | allow ssh_keygen_t self:unix_stream_socket create_stream_socket_perms; |
0404a390 | 401 | |
c0868a7a | 402 | allow ssh_keygen_t sshd_key_t:file manage_file_perms; |
0bfccda4 | 403 | files_etc_filetrans(ssh_keygen_t, sshd_key_t, file) |
0404a390 | 404 | |
75beb950 | 405 | kernel_read_kernel_sysctls(ssh_keygen_t) |
0404a390 | 406 | |
75beb950 | 407 | fs_search_auto_mountpoints(ssh_keygen_t) |
ab940a4c | 408 | |
75beb950 CP |
409 | dev_read_sysfs(ssh_keygen_t) |
410 | dev_read_urand(ssh_keygen_t) | |
0404a390 | 411 | |
75beb950 | 412 | term_dontaudit_use_console(ssh_keygen_t) |
0404a390 | 413 | |
75beb950 | 414 | domain_use_interactive_fds(ssh_keygen_t) |
0404a390 | 415 | |
75beb950 | 416 | files_read_etc_files(ssh_keygen_t) |
0404a390 | 417 | |
75beb950 CP |
418 | init_use_fds(ssh_keygen_t) |
419 | init_use_script_ptys(ssh_keygen_t) | |
0404a390 | 420 | |
cde15072 CP |
421 | auth_use_nsswitch(ssh_keygen_t) |
422 | ||
75beb950 | 423 | logging_send_syslog_msg(ssh_keygen_t) |
0404a390 | 424 | |
75beb950 | 425 | userdom_dontaudit_use_unpriv_user_fds(ssh_keygen_t) |
0404a390 | 426 | |
75beb950 CP |
427 | optional_policy(` |
428 | seutil_sigchld_newrole(ssh_keygen_t) | |
429 | ') | |
430 | ||
431 | optional_policy(` | |
432 | udev_read_db(ssh_keygen_t) | |
c0d1566a | 433 | ') |