374 lines
9.0 KiB
Plaintext
374 lines
9.0 KiB
Plaintext
policy_module(ssh)
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########################################
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#
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# Declarations
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#
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## <desc>
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## <p>
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## allow host key based authentication
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## </p>
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## </desc>
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gen_tunable(allow_ssh_keysign, false)
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## <desc>
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## <p>
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## Allow ssh logins as sysadm_r:sysadm_t
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## </p>
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## </desc>
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gen_tunable(ssh_sysadm_login, false)
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## <desc>
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## <p>
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## Allow ssh to use gpg-agent
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## </p>
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## </desc>
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gen_tunable(ssh_use_gpg_agent, false)
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attribute ssh_server;
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attribute ssh_agent_type;
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type ssh_keygen_t;
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type ssh_keygen_exec_t;
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init_system_domain(ssh_keygen_t, ssh_keygen_exec_t)
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role system_r types ssh_keygen_t;
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type sshd_exec_t;
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corecmd_executable_file(sshd_exec_t)
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ssh_server_template(sshd)
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init_daemon_domain(sshd_t, sshd_exec_t)
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type sshd_key_t;
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files_type(sshd_key_t)
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type sshd_tmp_t;
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files_tmp_file(sshd_tmp_t)
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files_poly_parent(sshd_tmp_t)
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type sshd_keygen_unit_t;
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init_unit_file(sshd_keygen_unit_t)
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type sshd_unit_t;
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init_unit_file(sshd_unit_t)
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type ssh_t;
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type ssh_exec_t;
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userdom_user_application_domain(ssh_t, ssh_exec_t)
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type ssh_agent_exec_t;
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corecmd_executable_file(ssh_agent_exec_t)
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type ssh_agent_tmp_t;
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userdom_user_tmp_file(ssh_agent_tmp_t)
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type ssh_keysign_t;
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type ssh_keysign_exec_t;
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userdom_user_application_domain(ssh_keysign_t, ssh_keysign_exec_t)
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type ssh_tmpfs_t;
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userdom_user_tmpfs_file(ssh_tmpfs_t)
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type ssh_home_t;
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userdom_user_home_content(ssh_home_t)
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type sshd_keytab_t;
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files_type(sshd_keytab_t)
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ifdef(`distro_debian',`
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init_daemon_runtime_file(sshd_runtime_t, dir, "sshd")
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')
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##############################
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#
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# SSH client local policy
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#
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allow ssh_t self:capability { dac_override dac_read_search setgid setuid };
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allow ssh_t self:process { transition signal_perms getsched setsched getsession getpgid setpgid getcap setcap share getattr noatsecure siginh rlimitinh dyntransition setkeycreate setsockcreate getrlimit };
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allow ssh_t self:fd use;
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allow ssh_t self:fifo_file rw_fifo_file_perms;
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allow ssh_t self:key manage_key_perms;
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allow ssh_t self:unix_dgram_socket { create_socket_perms sendto };
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allow ssh_t self:unix_stream_socket { create_stream_socket_perms connectto };
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allow ssh_t self:shm create_shm_perms;
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allow ssh_t self:sem create_sem_perms;
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allow ssh_t self:msgq create_msgq_perms;
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allow ssh_t self:msg { send receive };
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allow ssh_t self:tcp_socket create_stream_socket_perms;
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# Read the ssh key file.
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allow ssh_t sshd_key_t:file read_file_perms;
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# Access the ssh temporary files.
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allow ssh_t sshd_tmp_t:dir manage_dir_perms;
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allow ssh_t sshd_tmp_t:file manage_file_perms;
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files_tmp_filetrans(ssh_t, sshd_tmp_t, { file dir })
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manage_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
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manage_lnk_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
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manage_fifo_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
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manage_sock_files_pattern(ssh_t, ssh_tmpfs_t, ssh_tmpfs_t)
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fs_tmpfs_filetrans(ssh_t, ssh_tmpfs_t, { dir file lnk_file sock_file fifo_file })
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manage_dirs_pattern(ssh_t, ssh_home_t, ssh_home_t)
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manage_sock_files_pattern(ssh_t, ssh_home_t, ssh_home_t)
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userdom_user_home_dir_filetrans(ssh_t, ssh_home_t, { dir sock_file })
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# Allow the ssh program to communicate with ssh-agent.
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stream_connect_pattern(ssh_t, ssh_agent_tmp_t, ssh_agent_tmp_t, ssh_agent_type)
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allow ssh_t sshd_t:unix_stream_socket connectto;
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# ssh client can manage the keys and config
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manage_files_pattern(ssh_t, ssh_home_t, ssh_home_t)
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read_lnk_files_pattern(ssh_t, ssh_home_t, ssh_home_t)
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# ssh servers can read the user keys and config
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allow ssh_server ssh_home_t:dir list_dir_perms;
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read_files_pattern(ssh_server, ssh_home_t, ssh_home_t)
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read_lnk_files_pattern(ssh_server, ssh_home_t, ssh_home_t)
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kernel_read_kernel_sysctls(ssh_t)
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kernel_read_system_state(ssh_t)
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corenet_all_recvfrom_netlabel(ssh_t)
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corenet_tcp_sendrecv_generic_if(ssh_t)
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corenet_tcp_sendrecv_generic_node(ssh_t)
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corenet_tcp_connect_ssh_port(ssh_t)
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corenet_sendrecv_ssh_client_packets(ssh_t)
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dev_read_urand(ssh_t)
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dev_dontaudit_read_rand(ssh_t)
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fs_getattr_all_fs(ssh_t)
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fs_search_auto_mountpoints(ssh_t)
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# run helper programs - needed eg for x11-ssh-askpass
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corecmd_exec_shell(ssh_t)
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corecmd_exec_bin(ssh_t)
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domain_use_interactive_fds(ssh_t)
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files_list_home(ssh_t)
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files_read_usr_files(ssh_t)
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files_read_etc_runtime_files(ssh_t)
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files_read_etc_files(ssh_t)
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files_read_var_files(ssh_t)
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logging_send_syslog_msg(ssh_t)
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logging_read_generic_logs(ssh_t)
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auth_use_nsswitch(ssh_t)
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miscfiles_read_generic_certs(ssh_t)
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miscfiles_read_localization(ssh_t)
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seutil_read_config(ssh_t)
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userdom_dontaudit_list_user_home_dirs(ssh_t)
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userdom_search_user_home_dirs(ssh_t)
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# Write to the user domain tty.
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userdom_use_user_terminals(ssh_t)
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# needs to read krb tgt
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userdom_read_user_tmp_files(ssh_t)
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tunable_policy(`allow_ssh_keysign',`
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domtrans_pattern(ssh_t, ssh_keysign_exec_t, ssh_keysign_t)
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')
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tunable_policy(`use_nfs_home_dirs',`
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fs_manage_nfs_dirs(ssh_t)
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fs_manage_nfs_files(ssh_t)
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')
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tunable_policy(`use_samba_home_dirs',`
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fs_manage_cifs_dirs(ssh_t)
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fs_manage_cifs_files(ssh_t)
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')
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# for port forwarding
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tunable_policy(`user_tcp_server',`
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corenet_tcp_bind_ssh_port(ssh_t)
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corenet_tcp_bind_generic_node(ssh_t)
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')
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optional_policy(`
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tunable_policy(`ssh_use_gpg_agent',`
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gpg_stream_connect_agent(ssh_t)
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')
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')
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optional_policy(`
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xserver_user_x_domain_template(ssh, ssh_t, ssh_tmpfs_t)
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xserver_domtrans_xauth(ssh_t)
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')
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##############################
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#
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# ssh_keysign_t local policy
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#
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allow ssh_keysign_t self:capability { setgid setuid };
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allow ssh_keysign_t self:unix_stream_socket create_socket_perms;
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allow ssh_keysign_t sshd_key_t:file read_inherited_file_perms;
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dev_read_urand(ssh_keysign_t)
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files_read_etc_files(ssh_keysign_t)
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optional_policy(`
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nscd_use(ssh_keysign_t)
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')
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#################################
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#
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# sshd local policy
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#
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# sshd_t is the domain for the sshd program.
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#
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# for /run/user/UID/bus access, probably pam_systemd.so
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allow sshd_t self:capability dac_read_search;
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# so a tunnel can point to another ssh tunnel
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allow sshd_t self:netlink_route_socket r_netlink_socket_perms;
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allow sshd_t self:key { search link write };
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allow sshd_t sshd_keytab_t:file read_file_perms;
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manage_dirs_pattern(sshd_t, sshd_tmp_t, sshd_tmp_t)
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manage_files_pattern(sshd_t, sshd_tmp_t, sshd_tmp_t)
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manage_sock_files_pattern(sshd_t, sshd_tmp_t, sshd_tmp_t)
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files_tmp_filetrans(sshd_t, sshd_tmp_t, { dir file sock_file })
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# to exec /usr/bin/fipscheck
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corecmd_exec_bin(sshd_t)
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kernel_link_key(sshd_t)
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kernel_search_key(sshd_t)
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term_use_all_ptys(sshd_t)
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term_setattr_all_ptys(sshd_t)
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term_relabelto_all_ptys(sshd_t)
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# for X forwarding
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corenet_tcp_bind_xserver_port(sshd_t)
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corenet_sendrecv_xserver_server_packets(sshd_t)
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ifdef(`distro_debian',`
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allow sshd_t self:process { getcap setcap };
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auth_use_pam_motd_dynamic(sshd_t)
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',`
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dontaudit sshd_t self:process { getcap setcap };
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')
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ifdef(`init_systemd',`
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auth_use_pam_systemd(sshd_t)
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init_dbus_chat(sshd_t)
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init_rw_stream_sockets(sshd_t)
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systemd_write_inherited_logind_sessions_pipes(sshd_t)
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')
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tunable_policy(`ssh_sysadm_login',`
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# Relabel and access ptys created by sshd
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# ioctl is necessary for logout() processing for utmp entry and for w to
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# display the tty.
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# some versions of sshd on the new SE Linux require setattr
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userdom_spec_domtrans_all_users(sshd_t)
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userdom_signal_all_users(sshd_t)
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',`
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userdom_spec_domtrans_unpriv_users(sshd_t)
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userdom_signal_unpriv_users(sshd_t)
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')
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tunable_policy(`allow_polyinstantiation',`
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allow sshd_t self:capability dac_override;
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files_relabel_generic_tmp_dirs(sshd_t)
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seutil_exec_setfiles(sshd_t)
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')
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optional_policy(`
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daemontools_service_domain(sshd_t, sshd_exec_t)
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')
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optional_policy(`
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inetd_tcp_service_domain(sshd_t, sshd_exec_t)
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')
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optional_policy(`
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kerberos_read_keytab(sshd_t)
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kerberos_use(sshd_t)
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')
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optional_policy(`
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oddjob_domtrans_mkhomedir(sshd_t)
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')
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optional_policy(`
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rpm_use_script_fds(sshd_t)
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')
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optional_policy(`
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rssh_spec_domtrans(sshd_t)
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# For reading /home/user/.ssh
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rssh_read_ro_content(sshd_t)
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')
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optional_policy(`
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xserver_domtrans_xauth(sshd_t)
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xserver_link_xdm_keys(sshd_t)
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')
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########################################
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#
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# ssh_keygen local policy
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#
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# ssh_keygen_t is the type of the ssh-keygen program when run at install time
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# and by sysadm_t
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dontaudit ssh_keygen_t self:capability sys_tty_config;
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allow ssh_keygen_t self:process { sigchld sigkill sigstop signull signal };
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allow ssh_keygen_t self:unix_stream_socket create_stream_socket_perms;
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allow ssh_keygen_t sshd_key_t:file manage_file_perms;
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files_etc_filetrans(ssh_keygen_t, sshd_key_t, file)
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kernel_read_kernel_sysctls(ssh_keygen_t)
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kernel_dontaudit_getattr_proc(ssh_keygen_t)
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kernel_dontaudit_read_system_state(ssh_keygen_t)
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fs_search_auto_mountpoints(ssh_keygen_t)
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dev_read_sysfs(ssh_keygen_t)
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dev_read_urand(ssh_keygen_t)
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dev_dontaudit_read_rand(ssh_keygen_t)
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term_dontaudit_use_console(ssh_keygen_t)
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domain_use_interactive_fds(ssh_keygen_t)
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files_read_etc_files(ssh_keygen_t)
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files_read_usr_files(ssh_keygen_t)
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init_use_fds(ssh_keygen_t)
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init_use_script_ptys(ssh_keygen_t)
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auth_use_nsswitch(ssh_keygen_t)
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logging_send_syslog_msg(ssh_keygen_t)
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miscfiles_read_localization(ssh_keygen_t)
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userdom_dontaudit_use_unpriv_user_fds(ssh_keygen_t)
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optional_policy(`
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seutil_sigchld_newrole(ssh_keygen_t)
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')
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