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

policy_module(snort, 1.9.1)

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

type snort_t;
type snort_exec_t;
init_daemon_domain(snort_t, snort_exec_t)

type snort_etc_t;
files_config_file(snort_etc_t)

type snort_initrc_exec_t;
init_script_file(snort_initrc_exec_t)

type snort_log_t;
logging_log_file(snort_log_t)

type snort_tmp_t;
files_tmp_file(snort_tmp_t)

type snort_var_run_t;
files_pid_file(snort_var_run_t)

########################################
#
# Local policy
#

allow snort_t self:capability { setgid setuid net_admin net_raw dac_override };
dontaudit snort_t self:capability sys_tty_config;
allow snort_t self:process signal_perms;
allow snort_t self:netlink_route_socket { bind create getattr nlmsg_read read write };
allow snort_t self:tcp_socket create_stream_socket_perms;
allow snort_t self:udp_socket create_socket_perms;
allow snort_t self:packet_socket create_socket_perms;
allow snort_t self:socket create_socket_perms;
# Snort IPS node. unverified.
allow snort_t self:netlink_firewall_socket { bind create getattr };

allow snort_t snort_etc_t:dir list_dir_perms;
allow snort_t snort_etc_t:file read_file_perms;
allow snort_t snort_etc_t:lnk_file { getattr read };

manage_files_pattern(snort_t, snort_log_t, snort_log_t)
create_dirs_pattern(snort_t, snort_log_t, snort_log_t)
logging_log_filetrans(snort_t, snort_log_t, { file dir })

manage_dirs_pattern(snort_t, snort_tmp_t, snort_tmp_t)
manage_files_pattern(snort_t, snort_tmp_t, snort_tmp_t)
files_tmp_filetrans(snort_t, snort_tmp_t, { file dir })

manage_files_pattern(snort_t, snort_var_run_t, snort_var_run_t)
files_pid_filetrans(snort_t, snort_var_run_t, file)

kernel_read_kernel_sysctls(snort_t)
kernel_read_sysctl(snort_t)
kernel_list_proc(snort_t)
kernel_read_proc_symlinks(snort_t)
kernel_request_load_module(snort_t)
kernel_dontaudit_read_system_state(snort_t)
kernel_read_network_state(snort_t)

corenet_all_recvfrom_unlabeled(snort_t)
corenet_all_recvfrom_netlabel(snort_t)
corenet_tcp_sendrecv_generic_if(snort_t)
corenet_udp_sendrecv_generic_if(snort_t)
corenet_raw_sendrecv_generic_if(snort_t)
corenet_tcp_sendrecv_generic_node(snort_t)
corenet_udp_sendrecv_generic_node(snort_t)
corenet_raw_sendrecv_generic_node(snort_t)
corenet_tcp_sendrecv_all_ports(snort_t)
corenet_udp_sendrecv_all_ports(snort_t)
corenet_tcp_connect_prelude_port(snort_t)

dev_read_sysfs(snort_t)
dev_read_rand(snort_t)
dev_read_urand(snort_t)
dev_read_usbmon_dev(snort_t)
# Red Hat bug 559861: Snort wants read, write, and ioctl on /dev/usbmon
# Snort uses libpcap, which can also monitor USB traffic. Maybe this is a side effect?
dev_rw_generic_usb_dev(snort_t)

domain_use_interactive_fds(snort_t)

files_read_etc_files(snort_t)
files_dontaudit_read_etc_runtime_files(snort_t)

fs_getattr_all_fs(snort_t)
fs_search_auto_mountpoints(snort_t)

init_read_utmp(snort_t)

logging_send_syslog_msg(snort_t)

miscfiles_read_localization(snort_t)

sysnet_read_config(snort_t)
# snorts must be able to resolve dns in case it wants to relay to a remote prelude-manager
sysnet_dns_name_resolve(snort_t)

userdom_dontaudit_use_unpriv_user_fds(snort_t)
userdom_dontaudit_search_user_home_dirs(snort_t)

optional_policy(`
	prelude_manage_spool(snort_t)
')

optional_policy(`
	seutil_sigchld_newrole(snort_t)
')

optional_policy(`
	udev_read_db(snort_t)
')