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

policy_module(postfix,1.2.1)

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

attribute postfix_user_domains;
# domains that transition to the
# postfix user domains
attribute postfix_user_domtrans;

postfix_public_domain_template(bounce)

type postfix_spool_bounce_t;
files_type(postfix_spool_bounce_t)

postfix_public_domain_template(cleanup)

type postfix_etc_t;
files_type(postfix_etc_t)

type postfix_exec_t;
files_type(postfix_exec_t)

# temp:
typeattribute postfix_exec_t entry_type;

postfix_server_domain_template(local)
mta_mailserver_delivery(postfix_local_t)

type postfix_local_tmp_t;
files_tmp_file(postfix_local_tmp_t)

# Program for creating database files
type postfix_map_t;
type postfix_map_exec_t;
domain_type(postfix_map_t)
domain_entry_file(postfix_map_t,postfix_map_exec_t)

type postfix_map_tmp_t;
files_tmp_file(postfix_map_tmp_t)

postfix_domain_template(master)
typealias postfix_master_t alias postfix_t;
# alias is a hack to make the disable trans bool
# generation macro work
mta_mailserver(postfix_t,postfix_master_exec_t)

postfix_public_domain_template(pickup)

postfix_public_domain_template(pipe)

postfix_user_domain_template(postdrop)
mta_mailserver_user_agent(postfix_postdrop_t)

postfix_user_domain_template(postqueue)

type postfix_private_t;
files_type(postfix_private_t)

type postfix_prng_t;
files_type(postfix_prng_t)

postfix_public_domain_template(qmgr)

postfix_user_domain_template(showq)

postfix_server_domain_template(smtp)
mta_mailserver_sender(postfix_smtp_t)

postfix_server_domain_template(smtpd)

type postfix_spool_t;
files_type(postfix_spool_t)

type postfix_spool_maildrop_t;
files_type(postfix_spool_maildrop_t)

type postfix_spool_flush_t;
files_type(postfix_spool_flush_t)

type postfix_public_t;
files_type(postfix_public_t)

type postfix_var_run_t;
files_pid_file(postfix_var_run_t)

########################################
#
# Postfix master process local policy
#

# chown is to set the correct ownership of queue dirs
allow postfix_master_t self:capability { chown dac_override kill setgid setuid net_bind_service sys_tty_config };
allow postfix_master_t self:fifo_file rw_file_perms;
allow postfix_master_t self:tcp_socket create_stream_socket_perms;
allow postfix_master_t self:udp_socket create_socket_perms;

allow postfix_master_t postfix_etc_t:file rw_file_perms;

can_exec(postfix_master_t,postfix_exec_t)

allow postfix_master_t postfix_map_exec_t:file rx_file_perms;

allow postfix_master_t postfix_postdrop_exec_t:file getattr;

allow postfix_master_t postfix_postqueue_exec_t:file getattr;

allow postfix_master_t postfix_private_t:dir rw_dir_perms;
allow postfix_master_t postfix_private_t:sock_file create_file_perms;
allow postfix_master_t postfix_private_t:fifo_file create_file_perms;

allow postfix_master_t postfix_prng_t:file rw_file_perms;

allow postfix_master_t postfix_public_t:fifo_file create_file_perms;
allow postfix_master_t postfix_public_t:sock_file create_file_perms;
allow postfix_master_t postfix_public_t:dir rw_dir_perms;

# allow access to deferred queue and allow removing bogus incoming entries
allow postfix_master_t postfix_spool_t:dir create_dir_perms;
allow postfix_master_t postfix_spool_t:file create_file_perms;

allow postfix_master_t postfix_spool_bounce_t:dir manage_dir_perms;
allow postfix_master_t postfix_spool_bounce_t:file getattr;

allow postfix_master_t postfix_spool_flush_t:dir create_dir_perms;
allow postfix_master_t postfix_spool_flush_t:file create_file_perms;
allow postfix_master_t postfix_spool_flush_t:lnk_file create_lnk_perms;

allow postfix_master_t postfix_spool_maildrop_t:dir rw_dir_perms;
allow postfix_master_t postfix_spool_maildrop_t:file { unlink rename getattr };

kernel_read_all_sysctls(postfix_master_t)

corenet_tcp_sendrecv_all_if(postfix_master_t)
corenet_udp_sendrecv_all_if(postfix_master_t)
corenet_raw_sendrecv_all_if(postfix_master_t)
corenet_tcp_sendrecv_all_nodes(postfix_master_t)
corenet_udp_sendrecv_all_nodes(postfix_master_t)
corenet_raw_sendrecv_all_nodes(postfix_master_t)
corenet_tcp_sendrecv_all_ports(postfix_master_t)
corenet_udp_sendrecv_all_ports(postfix_master_t)
corenet_non_ipsec_sendrecv(postfix_master_t)
corenet_tcp_bind_all_nodes(postfix_master_t)
corenet_udp_bind_all_nodes(postfix_master_t)
corenet_tcp_bind_amavisd_send_port(postfix_master_t)
corenet_tcp_bind_smtp_port(postfix_master_t)
corenet_tcp_connect_all_ports(postfix_master_t)

# for a find command
selinux_dontaudit_search_fs(postfix_master_t)

corecmd_exec_ls(postfix_master_t)
corecmd_exec_sbin(postfix_master_t)
corecmd_exec_shell(postfix_master_t)
corecmd_exec_bin(postfix_master_t)

domain_use_interactive_fds(postfix_master_t)

files_read_usr_files(postfix_master_t)

init_use_script_ptys(postfix_master_t)

miscfiles_dontaudit_search_man_pages(postfix_master_t)

seutil_sigchld_newrole(postfix_master_t)
# postfix does a "find" on startup for some reason - keep it quiet
seutil_dontaudit_search_config(postfix_master_t)

sysnet_read_config(postfix_master_t)

mta_rw_aliases(postfix_master_t)
mta_read_sendmail_bin(postfix_master_t)

optional_policy(`
	mount_send_nfs_client_request(postfix_master_t)
')

optional_policy(`
	nis_use_ypbind(postfix_master_t)
')

###########################################################
#
# Partially converted rules.  THESE ARE ONLY TEMPORARY
#

ifdef(`distro_redhat',`
	# for newer main.cf that uses /etc/aliases
	allow postfix_master_t etc_t:dir rw_dir_perms;
	allow postfix_master_t etc_aliases_t:dir create_dir_perms;
	allow postfix_master_t etc_aliases_t:file create_file_perms;
	allow postfix_master_t etc_aliases_t:lnk_file create_lnk_perms;
	allow postfix_master_t etc_aliases_t:sock_file create_file_perms;
	allow postfix_master_t etc_aliases_t:fifo_file create_file_perms;
	type_transition postfix_master_t etc_t:{ file lnk_file sock_file fifo_file } etc_aliases_t;

	allow postfix_master_t postfix_etc_t:dir rw_dir_perms;
	allow postfix_master_t etc_aliases_t:dir create_dir_perms;
	allow postfix_master_t etc_aliases_t:file create_file_perms;
	allow postfix_master_t etc_aliases_t:lnk_file create_lnk_perms;
	allow postfix_master_t etc_aliases_t:sock_file create_file_perms;
	allow postfix_master_t etc_aliases_t:fifo_file create_file_perms;
	type_transition postfix_master_t postfix_etc_t:{ dir file lnk_file sock_file fifo_file } etc_aliases_t;
')

# end partially converted rules

########################################
#
# Postfix bounce local policy
#

allow postfix_bounce_t self:capability dac_read_search;
allow postfix_bounce_t self:tcp_socket create_socket_perms;

allow postfix_bounce_t postfix_public_t:sock_file write;

allow postfix_bounce_t postfix_spool_t:dir create_dir_perms;
allow postfix_bounce_t postfix_spool_t:file create_file_perms;
allow postfix_bounce_t postfix_spool_t:lnk_file create_lnk_perms;

allow postfix_bounce_t postfix_spool_bounce_t:dir create_dir_perms;
allow postfix_bounce_t postfix_spool_bounce_t:file create_file_perms;
allow postfix_bounce_t postfix_spool_bounce_t:lnk_file create_lnk_perms;

########################################
#
# Postfix cleanup local policy
#

allow postfix_cleanup_t self:process setrlimit;

# connect to master process
allow postfix_cleanup_t postfix_master_t:unix_stream_socket connectto;
allow postfix_cleanup_t postfix_private_t:dir search;
allow postfix_cleanup_t postfix_private_t:sock_file rw_file_perms;

allow postfix_cleanup_t postfix_public_t:fifo_file rw_file_perms;
allow postfix_cleanup_t postfix_public_t:sock_file { getattr write };

allow postfix_cleanup_t postfix_spool_t:dir create_dir_perms;
allow postfix_cleanup_t postfix_spool_t:file create_file_perms;
allow postfix_cleanup_t postfix_spool_t:lnk_file create_lnk_perms;

allow postfix_cleanup_t postfix_spool_bounce_t:dir r_dir_perms;

########################################
#
# Postfix local local policy
#

allow postfix_local_t self:fifo_file rw_file_perms;
allow postfix_local_t self:process { setsched setrlimit };

allow postfix_local_t postfix_local_tmp_t:dir create_dir_perms;
allow postfix_local_t postfix_local_tmp_t:file create_file_perms;
files_tmp_filetrans(postfix_local_t, postfix_local_tmp_t, { file dir })

# connect to master process
allow postfix_local_t postfix_master_t:unix_stream_socket connectto;
allow postfix_local_t postfix_public_t:dir search;
allow postfix_local_t postfix_public_t:sock_file write;

# for .forward - maybe we need a new type for it?
allow postfix_local_t postfix_private_t:dir search;
allow postfix_local_t postfix_private_t:sock_file rw_file_perms;

allow postfix_local_t postfix_spool_t:file rw_file_perms;

corecmd_exec_shell(postfix_local_t)
corecmd_exec_bin(postfix_local_t)

files_read_etc_files(postfix_local_t)

mta_read_aliases(postfix_local_t)
mta_delete_spool(postfix_local_t)
# For reading spamassasin
mta_read_config(postfix_local_t)

optional_policy(`
	procmail_domtrans(postfix_local_t)
')

########################################
#
# Postfix map local policy
#

allow postfix_map_t self:capability setgid;
allow postfix_map_t self:unix_stream_socket create_stream_socket_perms;
allow postfix_map_t self:unix_dgram_socket create_socket_perms;
allow postfix_map_t self:tcp_socket create_stream_socket_perms;
allow postfix_map_t self:udp_socket create_socket_perms;

allow postfix_map_t postfix_etc_t:dir create_dir_perms;
allow postfix_map_t postfix_etc_t:file create_file_perms;
allow postfix_map_t postfix_etc_t:lnk_file create_lnk_perms;

allow postfix_map_t postfix_map_tmp_t:dir create_dir_perms;
allow postfix_map_t postfix_map_tmp_t:file create_file_perms;
files_tmp_filetrans(postfix_map_t, postfix_map_tmp_t, { file dir })

kernel_read_kernel_sysctls(postfix_map_t)
kernel_dontaudit_list_proc(postfix_map_t)

corenet_tcp_sendrecv_all_if(postfix_map_t)
corenet_udp_sendrecv_all_if(postfix_map_t)
corenet_raw_sendrecv_all_if(postfix_map_t)
corenet_tcp_sendrecv_all_nodes(postfix_map_t)
corenet_udp_sendrecv_all_nodes(postfix_map_t)
corenet_raw_sendrecv_all_nodes(postfix_map_t)
corenet_tcp_sendrecv_all_ports(postfix_map_t)
corenet_udp_sendrecv_all_ports(postfix_map_t)
corenet_non_ipsec_sendrecv(postfix_map_t)
corenet_tcp_bind_all_nodes(postfix_map_t)
corenet_udp_bind_all_nodes(postfix_map_t)
corenet_tcp_connect_all_ports(postfix_map_t)

corecmd_list_bin(postfix_map_t)
corecmd_read_bin_symlinks(postfix_map_t)
corecmd_read_bin_files(postfix_map_t)
corecmd_read_bin_pipes(postfix_map_t)
corecmd_read_bin_sockets(postfix_map_t)
corecmd_list_sbin(postfix_map_t)
corecmd_read_sbin_symlinks(postfix_map_t)
corecmd_read_sbin_files(postfix_map_t)
corecmd_read_sbin_pipes(postfix_map_t)
corecmd_read_sbin_sockets(postfix_map_t)

files_list_home(postfix_map_t)
files_read_usr_files(postfix_map_t)
files_read_etc_files(postfix_map_t)
files_read_etc_runtime_files(postfix_map_t)
files_dontaudit_search_var(postfix_map_t)

libs_use_ld_so(postfix_map_t)
libs_use_shared_libs(postfix_map_t)

logging_send_syslog_msg(postfix_map_t)

miscfiles_read_localization(postfix_map_t)

seutil_read_config(postfix_map_t)

sysnet_read_config(postfix_map_t)

ifdef(`targeted_policy',`
	# FIXME: would be better to use a run interface
	role system_r types postfix_map_t;
')

tunable_policy(`read_default_t',`
	files_list_default(postfix_map_t)
	files_read_default_files(postfix_map_t)
	files_read_default_symlinks(postfix_map_t)
	files_read_default_sockets(postfix_map_t)
	files_read_default_pipes(postfix_map_t)
')

optional_policy(`
	locallogin_dontaudit_use_fds(postfix_map_t)
')

# a "run" interface needs to be
# added, and have sysadm_t use it
# in a optional_policy block.

########################################
#
# Postfix pickup local policy
#

allow postfix_pickup_t self:tcp_socket create_socket_perms;

allow postfix_pickup_t postfix_master_t:unix_stream_socket connectto;

allow postfix_pickup_t postfix_private_t:dir search;
allow postfix_pickup_t postfix_private_t:sock_file write;

allow postfix_pickup_t postfix_public_t:fifo_file rw_file_perms;
allow postfix_pickup_t postfix_public_t:sock_file rw_file_perms;

allow postfix_pickup_t postfix_spool_maildrop_t:dir rw_dir_perms;
allow postfix_pickup_t postfix_spool_maildrop_t:file r_file_perms;
allow postfix_pickup_t postfix_spool_maildrop_t:file unlink;

########################################
#
# Postfix pipe local policy
#

allow postfix_pipe_t self:fifo_file { read write };

allow postfix_pipe_t postfix_private_t:dir search;
allow postfix_pipe_t postfix_private_t:sock_file write;

allow postfix_pipe_t postfix_public_t:fifo_file { getattr write };

allow postfix_pipe_t postfix_spool_t:dir search;
allow postfix_pipe_t postfix_spool_t:file rw_file_perms;

optional_policy(`
	procmail_domtrans(postfix_pipe_t)
')

optional_policy(`
	mailman_domtrans_queue(postfix_pipe_t)
')

########################################
#
# Postfix postdrop local policy
#

# usually it does not need a UDP socket
allow postfix_postdrop_t self:capability sys_resource;
allow postfix_postdrop_t self:tcp_socket create;
allow postfix_postdrop_t self:udp_socket create_socket_perms;

allow postfix_postdrop_t postfix_public_t:dir search;
allow postfix_postdrop_t postfix_public_t:fifo_file rw_file_perms;

allow postfix_postdrop_t postfix_spool_maildrop_t:dir rw_dir_perms;
allow postfix_postdrop_t postfix_spool_maildrop_t:file create_file_perms;

corenet_udp_sendrecv_all_if(postfix_postdrop_t)
corenet_udp_sendrecv_all_nodes(postfix_postdrop_t)

term_dontaudit_use_all_user_ptys(postfix_postdrop_t)
term_dontaudit_use_all_user_ttys(postfix_postdrop_t)

sysnet_dns_name_resolve(postfix_postdrop_t)

mta_rw_user_mail_stream_sockets(postfix_postdrop_t)

ifdef(`targeted_policy', `
	term_use_unallocated_ttys(postfix_postdrop_t)
	term_use_generic_ptys(postfix_postdrop_t)
')

optional_policy(`
	cron_use_fds(postfix_postdrop_t)
	cron_rw_pipes(postfix_postdrop_t)
	cron_use_system_job_fds(postfix_postdrop_t)
	cron_rw_system_job_pipes(postfix_postdrop_t)
')

optional_policy(`
	ppp_use_fds(postfix_postqueue_t)
	ppp_sigchld(postfix_postqueue_t)
')

#######################################
#
# Postfix postqueue local policy
#

allow postfix_postqueue_t self:tcp_socket create;
allow postfix_postqueue_t self:udp_socket { create ioctl };

# wants to write to /var/spool/postfix/public/showq
allow postfix_postqueue_t postfix_public_t:sock_file rw_file_perms;
allow postfix_postqueue_t postfix_master_t:unix_stream_socket connectto;

allow postfix_postqueue_t postfix_public_t:dir search;
# write to /var/spool/postfix/public/qmgr
allow postfix_postqueue_t postfix_public_t:fifo_file { getattr write };

domain_auto_trans(postfix_master_t, postfix_postqueue_exec_t, postfix_postqueue_t)
allow postfix_master_t postfix_postqueue_t:fd use;
allow postfix_postqueue_t postfix_master_t:fd use;
allow postfix_postqueue_t postfix_master_t:fifo_file rw_file_perms;
allow postfix_postqueue_t postfix_master_t:process sigchld;

domain_auto_trans(postfix_postqueue_t, postfix_showq_exec_t, postfix_showq_t)
allow postfix_postqueue_t postfix_showq_t:fd use;
allow postfix_showq_t postfix_postqueue_t:fd use;
allow postfix_showq_t postfix_postqueue_t:fifo_file rw_file_perms;
allow postfix_showq_t postfix_postqueue_t:process sigchld;

# to write the mailq output, it really should not need read access!
term_use_all_user_ptys(postfix_postqueue_t)
term_use_all_user_ttys(postfix_postqueue_t)

init_sigchld_script(postfix_postqueue_t)
init_use_script_fds(postfix_postqueue_t)

sysnet_dontaudit_read_config(postfix_postqueue_t)

########################################
#
# Postfix qmgr local policy
#

allow postfix_qmgr_t postfix_master_t:unix_stream_socket connectto;

allow postfix_qmgr_t postfix_private_t:dir search;
allow postfix_qmgr_t postfix_private_t:sock_file rw_file_perms;

allow postfix_qmgr_t postfix_public_t:fifo_file rw_file_perms;
allow postfix_qmgr_t postfix_public_t:sock_file write;

# for /var/spool/postfix/active
allow postfix_qmgr_t postfix_spool_t:dir create_dir_perms;
allow postfix_qmgr_t postfix_spool_t:file create_file_perms;
allow postfix_qmgr_t postfix_spool_t:lnk_file create_lnk_perms;

allow postfix_qmgr_t postfix_spool_bounce_t:dir { getattr read search };
allow postfix_qmgr_t postfix_spool_bounce_t:file { read getattr };
allow postfix_qmgr_t postfix_spool_bounce_t:lnk_file { getattr read };

########################################
#
# Postfix showq local policy
#

allow postfix_showq_t self:capability { setuid setgid };
allow postfix_showq_t self:tcp_socket create_socket_perms;

# the following auto_trans is usually in postfix server domain
domain_auto_trans(postfix_master_t, postfix_showq_exec_t, postfix_showq_t)
allow postfix_master_t postfix_showq_t:fd use;
allow postfix_showq_t postfix_master_t:fd use;
allow postfix_showq_t postfix_master_t:fifo_file rw_file_perms;
allow postfix_showq_t postfix_master_t:process sigchld;

allow postfix_showq_t postfix_master_t:unix_stream_socket { accept rw_socket_perms };

allow postfix_showq_t postfix_spool_t:file r_file_perms;

allow postfix_showq_t postfix_spool_maildrop_t:dir { getattr read search };
allow postfix_showq_t postfix_spool_maildrop_t:file { read getattr };
allow postfix_showq_t postfix_spool_maildrop_t:lnk_file { getattr read };

# to write the mailq output, it really should not need read access!
term_use_all_user_ptys(postfix_showq_t)
term_use_all_user_ttys(postfix_showq_t)

sysnet_dns_name_resolve(postfix_showq_t)

########################################
#
# Postfix smtp delivery local policy
#

# connect to master process
allow postfix_smtp_t postfix_master_t:unix_stream_socket connectto;
allow postfix_smtp_t { postfix_private_t postfix_public_t }:dir search;
allow postfix_smtp_t { postfix_private_t postfix_public_t }:sock_file write;

allow postfix_smtp_t postfix_spool_t:file rw_file_perms;

kernel_tcp_recvfrom(postfix_smtp_t)

# if you have two different mail servers on the same host let them talk via
# SMTP, also if one mail server wants to talk to itself then allow it and let
# the SMTP protocol sort it out (SE Linux is not to prevent mail server
# misconfiguration)
mta_tcp_connect_all_mailservers(postfix_smtp_t)

########################################
#
# Postfix smtpd local policy
#
allow postfix_smtpd_t postfix_master_t:tcp_socket rw_stream_socket_perms;

# connect to master process
allow postfix_smtpd_t postfix_master_t:unix_stream_socket connectto;
allow postfix_smtpd_t { postfix_private_t postfix_public_t }:dir search;
allow postfix_smtpd_t { postfix_private_t postfix_public_t }:sock_file rw_file_perms;

# for prng_exch
allow postfix_smtpd_t postfix_spool_t:file rw_file_perms;
allow { postfix_smtp_t postfix_smtpd_t } postfix_prng_t:file rw_file_perms;

# for OpenSSL certificates
files_read_usr_files(postfix_smtpd_t)
mta_read_aliases(postfix_smtpd_t)

optional_policy(`
	sasl_connect(postfix_smtpd_t)
')