selinux-policy/policy/modules/services/bind.te

policy_module(bind,1.6.0)

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

## <desc>
## <p>
## Allow BIND to write the master zone files.
## Generally this is used for dynamic DNS or zone transfers.
## </p>
## </desc>
gen_tunable(named_write_master_zones,false)

# for DNSSEC key files
type dnssec_t;
files_security_file(dnssec_t)

type named_t;
type named_exec_t;
init_daemon_domain(named_t,named_exec_t)
role system_r types named_t;

type named_checkconf_exec_t;
init_system_domain(named_t,named_checkconf_exec_t)

# A type for configuration files of named.
type named_conf_t;
files_type(named_conf_t)
files_mountpoint(named_conf_t)

# for secondary zone files
type named_cache_t;
files_type(named_cache_t)

type named_log_t;
logging_log_file(named_log_t)

type named_tmp_t;
files_tmp_file(named_tmp_t)

type named_var_run_t;
files_pid_file(named_var_run_t)

# for primary zone files
type named_zone_t;
files_type(named_zone_t)

type ndc_t;
type ndc_exec_t;
init_system_domain(ndc_t,ndc_exec_t)
role system_r types ndc_t;

########################################
#
# Named local policy
#

allow named_t self:capability { chown dac_override fowner setgid setuid sys_chroot sys_nice sys_resource };
dontaudit named_t self:capability sys_tty_config;
allow named_t self:process { setsched setcap setrlimit signal_perms };
allow named_t self:fifo_file rw_fifo_file_perms;
allow named_t self:unix_stream_socket create_stream_socket_perms;
allow named_t self:unix_dgram_socket create_socket_perms;
allow named_t self:tcp_socket create_stream_socket_perms;
allow named_t self:udp_socket create_socket_perms;

allow named_t dnssec_t:file { getattr read };

# read configuration
allow named_t named_conf_t:dir list_dir_perms;
read_files_pattern(named_t,named_conf_t,named_conf_t)
read_lnk_files_pattern(named_t,named_conf_t,named_conf_t)

# write cache for secondary zones
manage_files_pattern(named_t,named_cache_t,named_cache_t)
manage_lnk_files_pattern(named_t,named_cache_t,named_cache_t)

can_exec(named_t, named_exec_t)

manage_files_pattern(named_t,named_log_t,named_log_t)
logging_log_filetrans(named_t,named_log_t,{ file dir })

manage_dirs_pattern(named_t,named_tmp_t,named_tmp_t)
manage_files_pattern(named_t,named_tmp_t,named_tmp_t)
files_tmp_filetrans(named_t, named_tmp_t, { file dir })

manage_files_pattern(named_t,named_var_run_t,named_var_run_t)
manage_sock_files_pattern(named_t,named_var_run_t,named_var_run_t)
files_pid_filetrans(named_t,named_var_run_t,{ file sock_file })

# read zone files
allow named_t named_zone_t:dir list_dir_perms;
read_files_pattern(named_t,named_zone_t,named_zone_t)
read_lnk_files_pattern(named_t,named_zone_t,named_zone_t)

kernel_read_kernel_sysctls(named_t)
kernel_read_system_state(named_t)
kernel_read_network_state(named_t)

corecmd_search_bin(named_t)

corenet_all_recvfrom_unlabeled(named_t)
corenet_all_recvfrom_netlabel(named_t)
corenet_tcp_sendrecv_all_if(named_t)
corenet_udp_sendrecv_all_if(named_t)
corenet_tcp_sendrecv_all_nodes(named_t)
corenet_udp_sendrecv_all_nodes(named_t)
corenet_tcp_sendrecv_all_ports(named_t)
corenet_udp_sendrecv_all_ports(named_t)
corenet_tcp_bind_all_nodes(named_t)
corenet_udp_bind_all_nodes(named_t)
corenet_tcp_bind_dns_port(named_t)
corenet_udp_bind_dns_port(named_t)
corenet_tcp_bind_rndc_port(named_t)
corenet_tcp_connect_all_ports(named_t)
corenet_sendrecv_dns_server_packets(named_t)
corenet_sendrecv_dns_client_packets(named_t)
corenet_sendrecv_rndc_server_packets(named_t)
corenet_sendrecv_rndc_client_packets(named_t)
corenet_udp_bind_all_unreserved_ports(named_t)

dev_read_sysfs(named_t)
dev_read_rand(named_t)
dev_read_urand(named_t)

domain_use_interactive_fds(named_t)

files_read_etc_files(named_t)
files_read_etc_runtime_files(named_t)

fs_getattr_all_fs(named_t)
fs_search_auto_mountpoints(named_t)

auth_use_nsswitch(named_t)

libs_use_ld_so(named_t)
libs_use_shared_libs(named_t)

logging_send_syslog_msg(named_t)

miscfiles_read_localization(named_t)
miscfiles_read_certs(named_t)

sysnet_read_config(named_t)

userdom_dontaudit_use_unpriv_user_fds(named_t)
userdom_dontaudit_search_sysadm_home_dirs(named_t)

tunable_policy(`named_write_master_zones',`
	manage_dirs_pattern(named_t,named_zone_t,named_zone_t)
	manage_files_pattern(named_t,named_zone_t,named_zone_t)
	manage_lnk_files_pattern(named_t,named_zone_t,named_zone_t)
')

optional_policy(`
	init_dbus_chat_script(named_t)

	sysnet_dbus_chat_dhcpc(named_t)

	dbus_system_bus_client_template(named,named_t)
	dbus_connect_system_bus(named_t)

	optional_policy(`
		networkmanager_dbus_chat(named_t)
	')
')

optional_policy(`
	kerberos_use(named_t)
')

optional_policy(`
	# this seems like fds that arent being
	# closed.  these should probably be
	# dontaudits instead.
	networkmanager_rw_udp_sockets(named_t)
	networkmanager_rw_packet_sockets(named_t)
	networkmanager_rw_routing_sockets(named_t)
')

optional_policy(`
	seutil_sigchld_newrole(named_t)
')

optional_policy(`
	udev_read_db(named_t)
')

########################################
#
# NDC local policy
#

# cjp: why net_admin?!
allow ndc_t self:capability { dac_override net_admin };
allow ndc_t self:process { fork signal_perms };
allow ndc_t self:fifo_file { read write getattr ioctl };
allow ndc_t self:unix_stream_socket { connect create_stream_socket_perms };
allow ndc_t self:tcp_socket create_socket_perms;
allow ndc_t self:netlink_route_socket r_netlink_socket_perms;

allow ndc_t dnssec_t:file { getattr read };
allow ndc_t dnssec_t:lnk_file { getattr read };

allow ndc_t named_t:unix_stream_socket connectto;

allow ndc_t named_conf_t:file { getattr read };
allow ndc_t named_conf_t:lnk_file { getattr read };

allow ndc_t named_var_run_t:sock_file rw_file_perms;

allow ndc_t named_zone_t:dir search;

kernel_read_kernel_sysctls(ndc_t)

corenet_all_recvfrom_unlabeled(ndc_t)
corenet_all_recvfrom_netlabel(ndc_t)
corenet_tcp_sendrecv_all_if(ndc_t)
corenet_tcp_sendrecv_all_nodes(ndc_t)
corenet_tcp_sendrecv_all_ports(ndc_t)
corenet_tcp_connect_rndc_port(ndc_t)
corenet_sendrecv_rndc_client_packets(ndc_t)

domain_use_interactive_fds(ndc_t)

files_read_etc_files(ndc_t)
files_search_pids(ndc_t)

fs_getattr_xattr_fs(ndc_t)

init_use_fds(ndc_t)
init_use_script_ptys(ndc_t)

libs_use_ld_so(ndc_t)
libs_use_shared_libs(ndc_t)

logging_send_syslog_msg(ndc_t)

miscfiles_read_localization(ndc_t)

sysnet_read_config(ndc_t)
sysnet_dns_name_resolve(ndc_t)

# for /etc/rndc.key
ifdef(`distro_redhat',`
	allow ndc_t named_conf_t:dir search;
')

optional_policy(`
	nis_use_ypbind(ndc_t)
')

optional_policy(`
	nscd_socket_use(ndc_t)
')

optional_policy(`
	ppp_dontaudit_use_fds(ndc_t)
')