selinux-policy/refpolicy/policy/modules/services/lpd.te

policy_module(lpd,1.1.0)

########################################
#
# Declarations
#

type checkpc_t;
type checkpc_exec_t;
init_system_domain(checkpc_t,checkpc_exec_t)
role system_r types checkpc_t;

type checkpc_log_t;
logging_log_file(checkpc_log_t)

type lpd_t;
type lpd_exec_t;
init_daemon_domain(lpd_t,lpd_exec_t)

type lpd_tmp_t;
files_tmp_file(lpd_tmp_t)

type lpd_var_run_t;
files_pid_file(lpd_var_run_t)

type print_spool_t;
files_tmp_file(print_spool_t)

type printer_t;
files_type(printer_t)

type printconf_t;
files_type(printconf_t)

########################################
#
# Checkpc local policy
#

# Allow checkpc to access the lpd spool so it can check & fix it.
# This requires that /usr/sbin/checkpc have type checkpc_t.

allow checkpc_t self:capability { setgid setuid dac_override };
allow checkpc_t self:process { fork signal_perms };
allow checkpc_t self:unix_stream_socket create_socket_perms;

allow checkpc_t checkpc_log_t:file create_file_perms;
logging_create_log(checkpc_t,checkpc_log_t)

allow checkpc_t lpd_var_run_t:dir { search getattr };
files_search_pids(checkpc_t)

allow checkpc_t print_spool_t:file { rw_file_perms unlink };
allow checkpc_t print_spool_t:dir { read write search add_name remove_name getattr };
files_search_spool(checkpc_t)

allow checkpc_t printconf_t:file getattr;
allow checkpc_t printconf_t:dir { getattr search read };

kernel_read_system_state(checkpc_t)

allow checkpc_t self:tcp_socket create_socket_perms;
allow checkpc_t self:udp_socket create_socket_perms;
corenet_tcp_sendrecv_all_if(checkpc_t)
corenet_udp_sendrecv_all_if(checkpc_t)
corenet_raw_sendrecv_all_if(checkpc_t)
corenet_tcp_sendrecv_all_nodes(checkpc_t)
corenet_udp_sendrecv_all_nodes(checkpc_t)
corenet_raw_sendrecv_all_nodes(checkpc_t)
corenet_tcp_sendrecv_all_ports(checkpc_t)
corenet_udp_sendrecv_all_ports(checkpc_t)
corenet_non_ipsec_sendrecv(checkpc_t)
corenet_tcp_bind_all_nodes(checkpc_t)
corenet_udp_bind_all_nodes(checkpc_t)
corenet_tcp_connect_all_ports(checkpc_t)

dev_append_printer(checkpc_t)

# This is less desirable, but checkpc demands /bin/bash and /bin/chown:
corecmd_exec_shell(checkpc_t)
corecmd_exec_bin(checkpc_t)
corecmd_search_sbin(checkpc_t)

domain_use_wide_inherit_fd(checkpc_t)

files_read_etc_files(checkpc_t)
files_read_etc_runtime_files(checkpc_t)

init_use_script_pty(checkpc_t)
# Allow access to /dev/console through the fd:
init_use_fd(checkpc_t)

libs_use_ld_so(checkpc_t)
libs_use_shared_libs(checkpc_t)

sysnet_read_config(checkpc_t)

ifdef(`targeted_policy',`
	term_use_generic_pty(checkpc_t)
	term_use_unallocated_tty(checkpc_t)
')

optional_policy(`cron',`
	cron_system_entry(checkpc_t,checkpc_exec_t)
')

optional_policy(`logging',`
	logging_send_syslog_msg(checkpc_t)
')

optional_policy(`nis',`
	nis_use_ypbind(checkpc_t)
')

########################################
#
# Lpd local policy
#

allow lpd_t self:capability { setgid setuid net_bind_service dac_read_search dac_override chown fowner };
dontaudit lpd_t self:capability sys_tty_config;
allow lpd_t self:process signal_perms;
allow lpd_t self:fifo_file rw_file_perms;
allow lpd_t self:unix_stream_socket create_stream_socket_perms;
allow lpd_t self:unix_dgram_socket create_socket_perms;

allow lpd_t lpd_tmp_t:dir create_dir_perms;
allow lpd_t lpd_tmp_t:file create_file_perms;
files_create_tmp_files(lpd_t, lpd_tmp_t, { file dir })

allow lpd_t lpd_var_run_t:dir rw_dir_perms;
allow lpd_t lpd_var_run_t:file create_file_perms;
allow lpd_t lpd_var_run_t:sock_file create_file_perms;
files_create_pid(lpd_t,lpd_var_run_t)

# Write to /var/spool/lpd.
allow lpd_t print_spool_t:dir rw_dir_perms;
allow lpd_t print_spool_t:file create_file_perms;
allow lpd_t print_spool_t:file rw_file_perms;
files_search_spool(lpd_t)

# lpd must be able to execute the filter utilities in /usr/share/printconf.
allow lpd_t printconf_t:dir { getattr search read };
can_exec(lpd_t, printconf_t)

# Create and bind to /dev/printer.
allow lpd_t printer_t:lnk_file create_lnk_perms;
dev_create_dev_node(lpd_t,printer_t,lnk_file)
# cjp: I believe these have no effect:
allow lpd_t printer_t:unix_stream_socket name_bind;
allow lpd_t printer_t:unix_dgram_socket name_bind;

kernel_read_kernel_sysctl(lpd_t)
# bash wants access to /proc/meminfo
kernel_read_system_state(lpd_t)

allow lpd_t self:tcp_socket create_stream_socket_perms;
allow lpd_t self:udp_socket create_stream_socket_perms;
corenet_tcp_sendrecv_all_if(lpd_t)
corenet_udp_sendrecv_all_if(lpd_t)
corenet_raw_sendrecv_all_if(lpd_t)
corenet_tcp_sendrecv_all_nodes(lpd_t)
corenet_udp_sendrecv_all_nodes(lpd_t)
corenet_raw_sendrecv_all_nodes(lpd_t)
corenet_tcp_sendrecv_all_ports(lpd_t)
corenet_udp_sendrecv_all_ports(lpd_t)
corenet_non_ipsec_sendrecv(lpd_t)
corenet_tcp_bind_all_nodes(lpd_t)
corenet_udp_bind_all_nodes(lpd_t)
corenet_tcp_bind_printer_port(lpd_t)

dev_read_sysfs(lpd_t)
dev_rw_printer(lpd_t)

fs_getattr_all_fs(lpd_t)
fs_search_auto_mountpoints(lpd_t)

term_dontaudit_use_console(lpd_t)

# Filter scripts may be shell scripts, and may invoke progs like /bin/mktemp
corecmd_exec_bin(lpd_t)
corecmd_exec_sbin(lpd_t)
corecmd_exec_shell(lpd_t)

domain_use_wide_inherit_fd(lpd_t)

files_read_etc_runtime_files(lpd_t)
files_read_usr_files(lpd_t)
# for defoma
files_list_world_readable(lpd_t)
files_read_world_readable_files(lpd_t)
files_read_world_readable_symlinks(lpd_t)
files_list_var_lib(lpd_t)
files_read_var_lib_files(lpd_t)
files_read_var_lib_symlinks(lpd_t)
# config files for lpd are of type etc_t, probably should change this
files_read_etc_files(lpd_t)

init_use_fd(lpd_t)
init_use_script_pty(lpd_t)

libs_use_ld_so(lpd_t)
libs_use_shared_libs(lpd_t)

logging_send_syslog_msg(lpd_t)

miscfiles_read_fonts(lpd_t)
miscfiles_read_localization(lpd_t)

sysnet_read_config(lpd_t)

userdom_dontaudit_use_unpriv_user_fd(lpd_t)
userdom_dontaudit_search_sysadm_home_dir(lpd_t)

ifdef(`targeted_policy',`
	term_dontaudit_use_unallocated_tty(lpd_t)
	term_dontaudit_use_generic_pty(lpd_t)
	files_dontaudit_read_root_file(lpd_t)
')

optional_policy(`nis',`
	nis_use_ypbind(lpd_t)
	nis_tcp_connect_ypbind(lpd_t)
')

optional_policy(`portmap',`
	portmap_udp_sendto(lpd_t)
')

optional_policy(`selinuxutil',`
	seutil_sigchld_newrole(lpd_t)
')

optional_policy(`udev',`
	udev_read_db(lpd_t)
')