policy_module(ssh,1.8.1) ######################################## # # Declarations # ## ##

## allow host key based authentication ##

##
gen_tunable(allow_ssh_keysign,false) ## ##

## Allow ssh logins as sysadm_r:sysadm_t ##

##
gen_tunable(ssh_sysadm_login,false) attribute ssh_server; # Type for the ssh-agent executable. type ssh_agent_exec_t; files_type(ssh_agent_exec_t) # ssh client executable. type ssh_exec_t; application_executable_file(ssh_exec_t) 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 ssh_keysign_exec_t; application_executable_file(ssh_keysign_exec_t) type sshd_exec_t; corecmd_executable_file(sshd_exec_t) ssh_server_template(sshd) init_daemon_domain(sshd_t,sshd_exec_t) ssh_server_template(sshd_extern) 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) ifdef(`enable_mcs',` init_ranged_daemon_domain(sshd_t,sshd_exec_t,s0 - mcs_systemhigh) ') ################################# # # 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 }; 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 }) kernel_search_key(sshd_t) kernel_link_key(sshd_t) # for X forwarding corenet_tcp_bind_xserver_port(sshd_t) corenet_sendrecv_xserver_server_packets(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 term_use_all_user_ptys(sshd_t) term_setattr_all_user_ptys(sshd_t) term_relabelto_all_user_ptys(sshd_t) 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) userdom_setattr_unpriv_users_ptys(sshd_t) userdom_relabelto_unpriv_users_ptys(sshd_t) userdom_use_unpriv_users_ptys(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(` rpm_use_script_fds(sshd_t) ') optional_policy(` rssh_spec_domtrans_all_users(sshd_t) # For reading /home/user/.ssh rssh_read_all_users_ro_content(sshd_t) ') optional_policy(` unconfined_domain(sshd_t) unconfined_shell_domtrans(sshd_t) ') ifdef(`TODO',` 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 allow sshd_t ptyfile:chr_file relabelto; optional_policy(` domain_trans(sshd_t, xauth_exec_t, userdomain) ') ',` optional_policy(` domain_trans(sshd_t, xauth_exec_t, unpriv_userdomain) ') # 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 allow sshd_t userpty_type:chr_file { relabelto read write getattr ioctl setattr }; ') ') dnl endif TODO ################################# # # sshd_extern local policy # # sshd_extern_t is the domain for ssh from outside our network # ifdef(`TODO',` domain_trans(initrc_t, sshd_exec_t, sshd_extern_t) domain_trans(sshd_extern_t, shell_exec_t, user_mini_domain) # Signal the user domains. allow sshd_extern_t user_mini_domain:process signal; ifdef(`xauth.te', ` domain_trans(sshd_extern_t, xauth_exec_t, user_mini_domain) ') # 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 allow sshd_extern_t user_mini_domain:chr_file { relabelto read write getattr ioctl setattr }; # inheriting stream sockets is needed for "ssh host command" as no pty # is allocated allow user_mini_domain sshd_extern_t:unix_stream_socket rw_stream_socket_perms; optional_policy(` domain_trans(inetd_t, sshd_exec_t, sshd_extern_t) ') ifdef(`direct_sysadm_daemon', ` # Direct execution by sysadm_r. domain_auto_trans(sysadm_t, sshd_exec_t, sshd_t) role_transition sysadm_r sshd_exec_t system_r; ') ') dnl endif TODO ######################################## # # 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) libs_use_ld_so(ssh_keygen_t) libs_use_shared_libs(ssh_keygen_t) logging_send_syslog_msg(ssh_keygen_t) userdom_dontaudit_use_unpriv_user_fds(ssh_keygen_t) optional_policy(` nscd_socket_use(ssh_keygen_t) ') optional_policy(` seutil_sigchld_newrole(ssh_keygen_t) ') optional_policy(` udev_read_db(ssh_keygen_t) ')