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

policy_module(ftp,1.0)

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

type ftpd_t;
type ftpd_exec_t;
init_daemon_domain(ftpd_t,ftpd_exec_t)

type ftpd_etc_t;
files_type(ftpd_etc_t)

# ftpd_lock_t is only needed when ftpd_is_daemon is true, but we cannot define types conditionally
type ftpd_lock_t;
files_lock_file(ftpd_lock_t)

type ftpd_tmp_t;
files_tmp_file(ftpd_tmp_t)

type ftpd_tmpfs_t;
files_tmpfs_file(ftpd_tmpfs_t)

type ftpd_var_run_t;
files_pid_file(ftpd_var_run_t)

type xferlog_t;
logging_log_file(xferlog_t)

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

allow ftpd_t self:capability { chown fowner fsetid setgid setuid sys_chroot sys_nice sys_resource };
dontaudit ftpd_t self:capability sys_tty_config;
allow ftpd_t self:process signal_perms;
allow ftpd_t self:process { getcap setcap setsched setrlimit };
allow ftpd_t self:fifo_file rw_file_perms;
allow ftpd_t self:unix_dgram_socket { sendto create_socket_perms };
allow ftpd_t self:unix_stream_socket create_socket_perms;
allow ftpd_t self:tcp_socket create_stream_socket_perms;
allow ftpd_t self:udp_socket create_socket_perms;

allow ftpd_t ftpd_etc_t:file { getattr read };

allow ftpd_t ftpd_tmp_t:dir create_dir_perms;
allow ftpd_t ftpd_tmp_t:file create_file_perms;
files_create_tmp_files(ftpd_t, ftpd_tmp_t, { file dir })

allow ftpd_t ftpd_tmpfs_t:fifo_file { create ioctl read getattr lock write setattr append link unlink rename };
allow ftpd_t ftpd_tmpfs_t:dir { read getattr lock search ioctl add_name remove_name write };
allow ftpd_t ftpd_tmpfs_t:file { create ioctl read getattr lock write setattr append link unlink rename };
allow ftpd_t ftpd_tmpfs_t:lnk_file { create read getattr setattr link unlink rename };
allow ftpd_t ftpd_tmpfs_t:sock_file { create ioctl read getattr lock write setattr append link unlink rename };
fs_create_tmpfs_data(ftpd_t,ftpd_tmpfs_t,{ dir file lnk_file sock_file fifo_file })

# Create and modify /var/log/xferlog.
allow ftpd_t xferlog_t:file create_file_perms;
logging_create_log(ftpd_t,xferlog_t)

kernel_read_kernel_sysctl(ftpd_t)
kernel_read_system_state(ftpd_t)

dev_read_sysfs(ftpd_t)
dev_read_urand(ftpd_t)

fs_search_auto_mountpoints(ftpd_t)
fs_getattr_all_fs(ftpd_t)

corenet_tcp_sendrecv_all_if(ftpd_t)
corenet_udp_sendrecv_all_if(ftpd_t)
corenet_raw_sendrecv_all_if(ftpd_t)
corenet_tcp_sendrecv_all_nodes(ftpd_t)
corenet_udp_sendrecv_all_nodes(ftpd_t)
corenet_raw_sendrecv_all_nodes(ftpd_t)
corenet_tcp_sendrecv_all_ports(ftpd_t)
corenet_udp_sendrecv_all_ports(ftpd_t)
corenet_tcp_bind_all_nodes(ftpd_t)
corenet_udp_bind_all_nodes(ftpd_t)
corenet_tcp_bind_ftp_data_port(ftpd_t)
corenet_tcp_bind_generic_port(ftpd_t)
corenet_tcp_connect_all_ports(ftpd_t)

term_dontaudit_use_console(ftpd_t)

# Append to /var/log/wtmp.
auth_append_login_records(ftpd_t)
#kerberized ftp requires the following
auth_write_login_records(ftpd_t)

corecmd_exec_bin(ftpd_t)
# Execute /bin/ls (can comment this out for proftpd)
# also may need rules to allow tar etc...
corecmd_exec_ls(ftpd_t)

domain_use_wide_inherit_fd(ftpd_t)

files_search_etc(ftpd_t)
files_read_etc_files(ftpd_t)
files_read_etc_runtime_files(ftpd_t)

init_use_fd(ftpd_t)
init_use_script_pty(ftpd_t)

libs_use_ld_so(ftpd_t)
libs_use_shared_libs(ftpd_t)

logging_send_syslog_msg(ftpd_t)

miscfiles_read_localization(ftpd_t)
miscfiles_read_public_files(ftpd_t)

seutil_dontaudit_search_config(ftpd_t)

sysnet_read_config(ftpd_t)

userdom_dontaudit_search_sysadm_home_dir(ftpd_t)
userdom_dontaudit_use_unpriv_user_fd(ftpd_t)

ifdef(`targeted_policy',`
	files_dontaudit_read_root_file(ftpd_t)

	term_dontaudit_use_generic_pty(ftpd_t)
	term_dontaudit_use_unallocated_tty(ftpd_t)
')

tunable_policy(`allow_ftpd_anon_write',`
	miscfiles_manage_public_files(ftpd_t)
') 

tunable_policy(`ftp_home_dir',`
	# allow access to /home
	files_list_home(ftpd_t)
	userdom_read_all_user_files(ftpd_t)
	userdom_manage_all_user_dirs(ftpd_t)
	userdom_manage_all_user_files(ftpd_t)
	userdom_manage_all_user_symlinks(ftpd_t)

	ifdef(`targeted_policy',`
		userdom_create_user_home(ftpd_t,{ dir file lnk_file sock_file fifo_file })
	')
')

tunable_policy(`ftpd_is_daemon',`
	allow ftpd_t ftpd_lock_t:file create_file_perms;
	files_create_lock(ftpd_t,ftpd_lock_t)

	corenet_tcp_bind_ftp_port(ftpd_t)
')

tunable_policy(`use_nfs_home_dirs && ftp_home_dir',`
	fs_read_nfs_files(ftpd_t)
	fs_read_nfs_symlinks(ftpd_t)
')

tunable_policy(`use_samba_home_dirs && ftp_home_dir',`
	fs_read_cifs_files(ftpd_t)
	fs_read_cifs_symlinks(ftpd_t)
')

optional_policy(`cron.te',`
	corecmd_exec_shell(ftpd_t)

	files_read_usr_files(ftpd_t)

       	cron_system_entry(ftpd_t, ftpd_exec_t)

	optional_policy(`logrotate.te',`
		logrotate_exec(ftpd_t)
	')
')

optional_policy(`inetd.te',`
	tunable_policy(`! ftpd_is_daemon',`
		#reh: typeattributes not allowed in conditionals yet.
		#inetd_tcp_service_domain(ftpd_t,ftpd_exec_t)
	')

	optional_policy(`tcpd.te',`
		tunable_policy(`! ftpd_is_daemon',`
			tcpd_domtrans(tcpd_t)
		')
	')
')

optional_policy(`mount.te',`
	mount_send_nfs_client_request(ftpd_t)
')

optional_policy(`selinuxutil.te',`
	seutil_sigchld_newrole(ftpd_t)
')

optional_policy(`udev.te', `
	udev_read_db(ftpd_t)
')

ifdef(`TODO',`
optional_policy(`rhgb.te',`
	rhgb_domain(ftpd_t)
')

# cjp: this was in base user macro, but we cannot
# use typeattribute ftpd_t privhome; interface
# since typeattribute doesnt work in conditionals
ifdef(`ftpd.te' , `
if (ftpd_is_daemon) {
file_type_auto_trans(ftpd_t, $1_home_dir_t, $1_home_t)
}
')
')