define(`ssh_per_userdomain_template',` # Derived domain based on the calling user domain and the program. type $1_ssh_t; #, privlog, nscd_client_domain; domain_type($1_ssh_t) type $1_home_ssh_t; #, $1_file_type; files_file_type($1_home_ssh_t) role $1_r types $1_ssh_t; # Transition from the user domain to the derived domain. domain_auto_trans($1_t, ssh_exec_t, $1_ssh_t) libs_use_ld_so($1_ssh_t) libs_use_shared_libs($1_ssh_t) tunable_policy(`use_nfs_home_dirs',` fs_manage_nfs_dirs($1_ssh_t) fs_manage_nfs_files($1_ssh_t) ') tunable_policy(`use_samba_home_dirs',` fs_manage_cifs_dirs($1_ssh_t) fs_manage_cifs_files($1_ssh_t) ') ifdef(`TODO',` # Grant permissions within the domain. general_domain_access($1_ssh_t) allow $1_ssh_t autofs_t:dir { search getattr }; # Use descriptors created by sshd allow $1_ssh_t privfd:fd use; read_locale($1_ssh_t) # Get attributes of file systems. allow $1_ssh_t fs_type:filesystem getattr; base_file_read_access($1_ssh_t) # Read /var. allow $1_ssh_t var_t:dir r_dir_perms; allow $1_ssh_t var_t:notdevfile_class_set r_file_perms; # Read /var/run, /var/log. allow $1_ssh_t var_run_t:dir r_dir_perms; allow $1_ssh_t var_run_t:{ file lnk_file } r_file_perms; allow $1_ssh_t var_log_t:dir r_dir_perms; allow $1_ssh_t var_log_t:{ file lnk_file } r_file_perms; # Read /etc. allow $1_ssh_t etc_t:dir r_dir_perms; allow $1_ssh_t etc_t:notdevfile_class_set r_file_perms; allow $1_ssh_t etc_runtime_t:{ file lnk_file } r_file_perms; # Read /dev directories and any symbolic links. allow $1_ssh_t device_t:dir r_dir_perms; allow $1_ssh_t device_t:lnk_file r_file_perms; # Read /dev/urandom. allow $1_ssh_t urandom_device_t:chr_file r_file_perms; # Read and write /dev/null. allow $1_ssh_t { null_device_t zero_device_t }:chr_file rw_file_perms; # Grant permissions needed to create TCP and UDP sockets and # to access the network. can_network_client_tcp($1_ssh_t) can_resolve($1_ssh_t) can_ypbind($1_ssh_t) can_kerberos($1_ssh_t) # for port forwarding if (user_tcp_server) { allow $1_ssh_t port_t:tcp_socket name_bind; } # Use capabilities. allow $1_ssh_t self:capability { setuid setgid dac_override dac_read_search }; # run helper programs - needed eg for x11-ssh-askpass can_exec($1_ssh_t, { shell_exec_t bin_t }) # Read the ssh key file. allow $1_ssh_t sshd_key_t:file r_file_perms; # Access the ssh temporary files. file_type_auto_trans($1_ssh_t, tmp_t, sshd_tmp_t) allow $1_ssh_t $1_tmp_t:dir r_dir_perms; # for rsync allow $1_ssh_t $1_t:unix_stream_socket rw_socket_perms; # Access the users .ssh directory. file_type_auto_trans({ sysadm_ssh_t $1_ssh_t }, $1_home_dir_t, $1_home_ssh_t, dir) file_type_auto_trans($1_ssh_t, $1_home_dir_t, $1_home_ssh_t, sock_file) allow $1_t $1_home_ssh_t:sock_file create_file_perms; allow { sysadm_ssh_t $1_ssh_t } $1_home_ssh_t:file create_file_perms; allow { sysadm_ssh_t $1_ssh_t } $1_home_ssh_t:lnk_file { getattr read }; dontaudit $1_ssh_t $1_home_t:dir { getattr search }; r_dir_file({ sshd_t sshd_extern_t }, $1_home_ssh_t) rw_dir_create_file($1_t, $1_home_ssh_t) # for /bin/sh used to execute xauth dontaudit $1_ssh_t proc_t:dir search; dontaudit $1_ssh_t proc_t:{ lnk_file file } { getattr read }; # Inherit and use descriptors from gnome-pty-helper. ifdef(`gnome-pty-helper.te', `allow $1_ssh_t $1_gph_t:fd use;') # Write to the user domain tty. access_terminal($1_ssh_t, $1) # Allow the user shell to signal the ssh program. allow $1_t $1_ssh_t:process signal; # allow ps to show ssh can_ps($1_t, $1_ssh_t) ifdef(`xserver.te', ` # Communicate with the X server. ifdef(`startx.te', ` can_unix_connect($1_ssh_t, $1_xserver_t) allow $1_ssh_t $1_xserver_tmp_t:sock_file rw_file_perms; allow $1_ssh_t $1_xserver_tmp_t:dir search; ')dnl end if startx ifdef(`xdm.te', ` allow $1_ssh_t { xdm_xserver_tmp_t xdm_tmp_t }:dir search; allow $1_ssh_t { xdm_tmp_t }:sock_file write; ') ')dnl end if xserver ifdef(`ssh-agent.te', ` ssh_agent_domain($1) ')dnl end if ssh_agent.te #allow ssh to access keys stored on removable media # Should we have a boolean around this? allow $1_ssh_t mnt_t:dir search; r_dir_file($1_ssh_t, removable_t) ifdef(`xdm.te', ` # should be able to remove these two later allow $1_ssh_t xdm_xserver_tmp_t:sock_file { read write }; allow $1_ssh_t xdm_xserver_tmp_t:dir search; allow $1_ssh_t xdm_xserver_t:unix_stream_socket connectto; allow $1_ssh_t xdm_xserver_t:shm r_shm_perms; allow $1_ssh_t xdm_xserver_t:fd use; allow $1_ssh_t xdm_xserver_tmpfs_t:file read; allow $1_ssh_t xdm_t:fd use; ')dnl end if xdm.te ') dnl endif TODO ') ######################################## # # # define(`sshd_program_domain', ` # auth_chkpwd is for running unix_chkpwd and unix_verify. type $1_t; #, nscd_client_domain; role system_r types $1_t; type $1_devpts_t; term_login_pty($1_devpts_t) type $1_var_run_t; files_pid_file($1_var_run_t) allow $1_t self:capability { kill sys_chroot sys_resource chown dac_override fowner fsetid setgid setuid sys_tty_config }; allow $1_t self:fifo_file rw_file_perms; allow $1_t self:process { signal setsched setrlimit setexec }; allow $1_t self:tcp_socket { listen accept create connect ioctl read getattr write setattr append bind getopt setopt shutdown }; allow $1_t self:udp_socket { connect create ioctl read getattr write setattr append bind getopt setopt shutdown }; allow $1_t $1_devpts_t:chr_file { rw_file_perms setattr getattr relabelfrom }; term_create_pty($1_t,$1_devpts_t) allow $1_t $1_var_run_t:file create_file_perms; files_create_pid($1_t,$1_var_run_t,file) can_exec($1_t, sshd_exec_t) # Access key files allow $1_t sshd_key_t:file { getattr read }; kernel_read_kernel_sysctl($1_t) corenet_tcp_sendrecv_all_if($1_t) corenet_udp_sendrecv_all_if($1_t) corenet_raw_sendrecv_all_if($1_t) corenet_tcp_sendrecv_all_nodes($1_t) corenet_udp_sendrecv_all_nodes($1_t) corenet_raw_sendrecv_all_nodes($1_t) corenet_udp_sendrecv_all_ports($1_t) corenet_tcp_sendrecv_all_ports($1_t) corenet_tcp_bind_all_nodes($1_t) corenet_udp_bind_all_nodes($1_t) dev_read_urand($1_t) selinux_get_fs_mount($1_t) selinux_validate_context($1_t) selinux_compute_access_vector($1_t) selinux_compute_create_context($1_t) selinux_compute_relabel_context($1_t) selinux_compute_user_contexts($1_t) auth_dontaudit_read_shadow($1_t) auth_domtrans_chk_passwd($1_t) auth_rw_login_records($1_t) auth_rw_lastlog($1_t) domain_wide_inherit_fd($1_t) domain_subj_id_change_exempt($1_t) domain_role_change_exempt($1_t) domain_obj_id_change_exempt($1_t) files_read_generic_etc_files($1_t) files_read_etc_runtime_files($1_t) init_rw_script_pid($1_t) libs_use_ld_so($1_t) libs_use_shared_libs($1_t) logging_search_logs($1_t) logging_send_syslog_msg($1_t) miscfiles_read_localization($1_t) seutil_read_default_contexts($1_t) sysnet_read_config($1_t) tunable_policy(`use_nfs_home_dirs',` fs_read_nfs_files($1_t) ') tunable_policy(`use_samba_home_dirs',` fs_read_cifs_files($1_t) ') ifdef(`TODO',` # do not allow statfs() dontaudit $1_t fs_type:filesystem getattr; allow $1_t bin_t:dir search; allow $1_t bin_t:lnk_file read; # for sshd subsystems, such as sftp-server. allow $1_t bin_t:file getattr; # Read /var. allow $1_t var_t:dir getattr; ifdef(`mount.te', ` allow $1_t mount_t:udp_socket rw_socket_perms; ') allow $1_t { home_root_t home_dir_type }:dir { search getattr }; allow $1_t autofs_t:dir { search getattr }; dontaudit sshd_t userpty_type:chr_file relabelfrom; optional_policy(`inetd.te',` if (run_ssh_inetd) { allow $1_t self:process signal; allow $1_t inetd_t:tcp_socket rw_socket_perms; allow $1_t var_run_t:dir { getattr search }; } else { corenet_tcp_bind_ssh_port($1_t) init_use_fd($1_t) init_use_script_pty($1_t) } ',` # These rules should match the else block # of the run_ssh_inetd conditional directly above corenet_tcp_bind_ssh_port($1_t) init_use_fd($1_t) init_use_script_pty($1_t) ') ') dnl end TODO ')