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- policy_module(ssh, 2.8.4)
- ########################################
- #
- # Declarations
- #
- ## <desc>
- ## <p>
- ## allow host key based authentication
- ## </p>
- ## </desc>
- gen_tunable(allow_ssh_keysign, false)
- ## <desc>
- ## <p>
- ## Allow ssh logins as sysadm_r:sysadm_t
- ## </p>
- ## </desc>
- gen_tunable(ssh_sysadm_login, false)
- ## <desc>
- ## <p>
- ## Allow ssh to use gpg-agent
- ## </p>
- ## </desc>
- gen_tunable(ssh_use_gpg_agent, false)
- attribute ssh_server;
- attribute ssh_agent_type;
- type ssh_keygen_t;
- type ssh_keygen_exec_t;
- init_system_domain(ssh_keygen_t, ssh_keygen_exec_t)
- role system_r types ssh_keygen_t;
- type sshd_exec_t;
- corecmd_executable_file(sshd_exec_t)
- ssh_server_template(sshd)
- init_daemon_domain(sshd_t, sshd_exec_t)
- type sshd_key_t;
- files_type(sshd_key_t)
- type sshd_tmp_t;
- files_tmp_file(sshd_tmp_t)
- files_poly_parent(sshd_tmp_t)
- type sshd_keygen_unit_t;
- init_unit_file(sshd_keygen_unit_t)
- type sshd_unit_t;
- init_unit_file(sshd_unit_t)
- ifdef(`enable_mcs',`
- init_ranged_daemon_domain(sshd_t, sshd_exec_t, s0 - mcs_systemhigh)
- ')
- type ssh_t;
- type ssh_exec_t;
- typealias ssh_t alias { user_ssh_t staff_ssh_t sysadm_ssh_t };
- typealias ssh_t alias { auditadm_ssh_t secadm_ssh_t };
- userdom_user_application_domain(ssh_t, ssh_exec_t)
- type ssh_agent_exec_t;
- corecmd_executable_file(ssh_agent_exec_t)
- type ssh_agent_tmp_t;
- typealias ssh_agent_tmp_t alias { user_ssh_agent_tmp_t staff_ssh_agent_tmp_t sysadm_ssh_agent_tmp_t };
- typealias ssh_agent_tmp_t alias { auditadm_ssh_agent_tmp_t secadm_ssh_agent_tmp_t };
- userdom_user_tmp_file(ssh_agent_tmp_t)
- type ssh_keysign_t;
- type ssh_keysign_exec_t;
- typealias ssh_keysign_t alias { user_ssh_keysign_t staff_ssh_keysign_t sysadm_ssh_keysign_t };
- typealias ssh_keysign_t alias { auditadm_ssh_keysign_t secadm_ssh_keysign_t };
- userdom_user_application_domain(ssh_keysign_t, ssh_keysign_exec_t)
- type ssh_tmpfs_t;
- typealias ssh_tmpfs_t alias { user_ssh_tmpfs_t staff_ssh_tmpfs_t sysadm_ssh_tmpfs_t };
- typealias ssh_tmpfs_t alias { auditadm_ssh_tmpfs_t secadm_ssh_tmpfs_t };
- userdom_user_tmpfs_file(ssh_tmpfs_t)
- type ssh_home_t;
- typealias ssh_home_t alias { home_ssh_t user_ssh_home_t user_home_ssh_t staff_home_ssh_t sysadm_home_ssh_t };
- typealias ssh_home_t alias { auditadm_home_ssh_t secadm_home_ssh_t };
- userdom_user_home_content(ssh_home_t)
- type sshd_keytab_t;
- files_type(sshd_keytab_t)
- ifdef(`distro_debian',`
- init_daemon_pid_file(sshd_var_run_t, dir, "sshd")
- ')
- ##############################
- #
- # SSH client local policy
- #
- allow ssh_t self:capability { setuid setgid dac_override dac_read_search };
- allow ssh_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap };
- allow ssh_t self:fd use;
- allow ssh_t self:fifo_file rw_fifo_file_perms;
- allow ssh_t self:unix_dgram_socket { create_socket_perms sendto };
- allow ssh_t self:unix_stream_socket { create_stream_socket_perms connectto };
- allow ssh_t self:shm create_shm_perms;
- allow ssh_t self:sem create_sem_perms;
- allow ssh_t self:msgq create_msgq_perms;
- allow ssh_t self:msg { send receive };
- allow ssh_t self:tcp_socket create_stream_socket_perms;
- # Read the ssh key file.
- allow ssh_t sshd_key_t:file read_file_perms;
- # Access the ssh temporary files.
- allow ssh_t sshd_tmp_t:dir manage_dir_perms;
- allow ssh_t sshd_tmp_t:file manage_file_perms;
- files_tmp_filetrans(ssh_t, sshd_tmp_t, { file dir })
- manage_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
- manage_lnk_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
- manage_fifo_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
- manage_sock_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
- fs_tmpfs_filetrans(ssh_t, ssh_tmpfs_t, { dir file lnk_file sock_file fifo_file })
- manage_dirs_pattern(ssh_t, ssh_home_t, ssh_home_t)
- manage_sock_files_pattern(ssh_t, ssh_home_t, ssh_home_t)
- userdom_user_home_dir_filetrans(ssh_t, ssh_home_t, { dir sock_file })
- # Allow the ssh program to communicate with ssh-agent.
- stream_connect_pattern(ssh_t, ssh_agent_tmp_t, ssh_agent_tmp_t, ssh_agent_type)
- allow ssh_t sshd_t:unix_stream_socket connectto;
- # ssh client can manage the keys and config
- manage_files_pattern(ssh_t, ssh_home_t, ssh_home_t)
- read_lnk_files_pattern(ssh_t, ssh_home_t, ssh_home_t)
- # ssh servers can read the user keys and config
- allow ssh_server ssh_home_t:dir list_dir_perms;
- read_files_pattern(ssh_server, ssh_home_t, ssh_home_t)
- read_lnk_files_pattern(ssh_server, ssh_home_t, ssh_home_t)
- kernel_read_kernel_sysctls(ssh_t)
- kernel_read_system_state(ssh_t)
- corenet_all_recvfrom_unlabeled(ssh_t)
- corenet_all_recvfrom_netlabel(ssh_t)
- corenet_tcp_sendrecv_generic_if(ssh_t)
- corenet_tcp_sendrecv_generic_node(ssh_t)
- corenet_tcp_sendrecv_all_ports(ssh_t)
- corenet_tcp_connect_ssh_port(ssh_t)
- corenet_sendrecv_ssh_client_packets(ssh_t)
- dev_read_urand(ssh_t)
- fs_getattr_all_fs(ssh_t)
- fs_search_auto_mountpoints(ssh_t)
- # run helper programs - needed eg for x11-ssh-askpass
- corecmd_exec_shell(ssh_t)
- corecmd_exec_bin(ssh_t)
- domain_use_interactive_fds(ssh_t)
- files_list_home(ssh_t)
- files_read_usr_files(ssh_t)
- files_read_etc_runtime_files(ssh_t)
- files_read_etc_files(ssh_t)
- files_read_var_files(ssh_t)
- logging_send_syslog_msg(ssh_t)
- logging_read_generic_logs(ssh_t)
- auth_use_nsswitch(ssh_t)
- miscfiles_read_localization(ssh_t)
- seutil_read_config(ssh_t)
- userdom_dontaudit_list_user_home_dirs(ssh_t)
- userdom_search_user_home_dirs(ssh_t)
- # Write to the user domain tty.
- userdom_use_user_terminals(ssh_t)
- # needs to read krb tgt
- userdom_read_user_tmp_files(ssh_t)
- tunable_policy(`allow_ssh_keysign',`
- domain_auto_trans(ssh_t, ssh_keysign_exec_t, ssh_keysign_t)
- allow ssh_keysign_t ssh_t:fd use;
- allow ssh_keysign_t ssh_t:process sigchld;
- allow ssh_keysign_t ssh_t:fifo_file rw_file_perms;
- ')
- tunable_policy(`use_nfs_home_dirs',`
- fs_manage_nfs_dirs(ssh_t)
- fs_manage_nfs_files(ssh_t)
- ')
- tunable_policy(`use_samba_home_dirs',`
- fs_manage_cifs_dirs(ssh_t)
- fs_manage_cifs_files(ssh_t)
- ')
- # for port forwarding
- tunable_policy(`user_tcp_server',`
- corenet_tcp_bind_ssh_port(ssh_t)
- corenet_tcp_bind_generic_node(ssh_t)
- ')
- optional_policy(`
- tunable_policy(`ssh_use_gpg_agent',`
- gpg_stream_connect_agent(ssh_t)
- ')
- ')
- optional_policy(`
- xserver_user_x_domain_template(ssh, ssh_t, ssh_tmpfs_t)
- xserver_domtrans_xauth(ssh_t)
- ')
- ##############################
- #
- # ssh_keysign_t local policy
- #
- allow ssh_keysign_t self:capability { setgid setuid };
- allow ssh_keysign_t self:unix_stream_socket create_socket_perms;
- allow ssh_keysign_t sshd_key_t:file { getattr read };
- dev_read_urand(ssh_keysign_t)
- files_read_etc_files(ssh_keysign_t)
- optional_policy(`
- nscd_use(ssh_keysign_t)
- ')
- #################################
- #
- # sshd local policy
- #
- # sshd_t is the domain for the sshd program.
- #
- # so a tunnel can point to another ssh tunnel
- allow sshd_t self:netlink_route_socket r_netlink_socket_perms;
- allow sshd_t self:key { search link write };
- allow sshd_t self:capability net_admin;
- allow sshd_t sshd_keytab_t:file read_file_perms;
- manage_dirs_pattern(sshd_t, sshd_tmp_t, sshd_tmp_t)
- manage_files_pattern(sshd_t, sshd_tmp_t, sshd_tmp_t)
- manage_sock_files_pattern(sshd_t, sshd_tmp_t, sshd_tmp_t)
- files_tmp_filetrans(sshd_t, sshd_tmp_t, { dir file sock_file })
- files_manage_all_pids(sshd_t)
- kernel_search_key(sshd_t)
- kernel_link_key(sshd_t)
- term_use_all_ptys(sshd_t)
- term_setattr_all_ptys(sshd_t)
- term_relabelto_all_ptys(sshd_t)
- # for X forwarding
- corenet_tcp_bind_xserver_port(sshd_t)
- corenet_sendrecv_xserver_server_packets(sshd_t)
- ifdef(`distro_debian',`
- allow sshd_t self:process { getcap setcap };
- ')
- ifdef(`init_systemd',`
- systemd_dbus_chat_logind(sshd_t)
- init_rw_stream_sockets(sshd_t)
- ')
- tunable_policy(`ssh_sysadm_login',`
- # Relabel and access ptys created by sshd
- # ioctl is necessary for logout() processing for utmp entry and for w to
- # display the tty.
- # some versions of sshd on the new SE Linux require setattr
- userdom_spec_domtrans_all_users(sshd_t)
- userdom_signal_all_users(sshd_t)
- ',`
- userdom_spec_domtrans_unpriv_users(sshd_t)
- userdom_signal_unpriv_users(sshd_t)
- ')
- optional_policy(`
- systemd_write_inherited_logind_sessions_pipes(sshd_t)
- systemd_dbus_chat_logind(sshd_t)
- ')
- optional_policy(`
- daemontools_service_domain(sshd_t, sshd_exec_t)
- ')
- optional_policy(`
- inetd_tcp_service_domain(sshd_t, sshd_exec_t)
- ')
- optional_policy(`
- kerberos_read_keytab(sshd_t)
- kerberos_use(sshd_t)
- ')
- optional_policy(`
- oddjob_domtrans_mkhomedir(sshd_t)
- ')
- optional_policy(`
- rpm_use_script_fds(sshd_t)
- ')
- optional_policy(`
- rssh_spec_domtrans(sshd_t)
- # For reading /home/user/.ssh
- rssh_read_ro_content(sshd_t)
- ')
- optional_policy(`
- unconfined_shell_domtrans(sshd_t)
- ')
- optional_policy(`
- xserver_domtrans_xauth(sshd_t)
- ')
- optional_policy(`
- apache_manage_sys_content(sshd_t)
- ')
- ########################################
- #
- # ssh_keygen local policy
- #
- # ssh_keygen_t is the type of the ssh-keygen program when run at install time
- # and by sysadm_t
- dontaudit ssh_keygen_t self:capability sys_tty_config;
- allow ssh_keygen_t self:process { sigchld sigkill sigstop signull signal };
- allow ssh_keygen_t self:unix_stream_socket create_stream_socket_perms;
- allow ssh_keygen_t sshd_key_t:file manage_file_perms;
- files_etc_filetrans(ssh_keygen_t, sshd_key_t, file)
- kernel_read_kernel_sysctls(ssh_keygen_t)
- fs_search_auto_mountpoints(ssh_keygen_t)
- dev_read_sysfs(ssh_keygen_t)
- dev_read_urand(ssh_keygen_t)
- term_dontaudit_use_console(ssh_keygen_t)
- domain_use_interactive_fds(ssh_keygen_t)
- files_read_etc_files(ssh_keygen_t)
- init_use_fds(ssh_keygen_t)
- init_use_script_ptys(ssh_keygen_t)
- auth_use_nsswitch(ssh_keygen_t)
- logging_send_syslog_msg(ssh_keygen_t)
- userdom_dontaudit_use_unpriv_user_fds(ssh_keygen_t)
- optional_policy(`
- seutil_sigchld_newrole(ssh_keygen_t)
- ')
- optional_policy(`
- udev_read_db(ssh_keygen_t)
- ')
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