## Policy common to all email tranfer agents.
########################################
##
## MTA stub interface. No access allowed.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_stub',`
gen_require(`
type sendmail_exec_t;
')
')
#######################################
##
## Basic mail transfer agent domain template.
##
##
##
## This template creates a derived domain which is
## a email transfer agent, which sends mail on
## behalf of the user.
##
##
## This is the basic types and rules, common
## to the system agent and user agents.
##
##
##
##
## The prefix of the domain (e.g., user
## is the prefix for user_t).
##
##
##
#
template(`mta_base_mail_template',`
gen_require(`
attribute user_mail_domain;
type sendmail_exec_t;
')
##############################
#
# $1_mail_t declarations
#
type $1_mail_t, user_mail_domain;
application_domain($1_mail_t, sendmail_exec_t)
type $1_mail_tmp_t;
files_tmp_file($1_mail_tmp_t)
manage_dirs_pattern($1_mail_t, $1_mail_tmp_t, $1_mail_tmp_t)
manage_files_pattern($1_mail_t, $1_mail_tmp_t, $1_mail_tmp_t)
files_tmp_filetrans($1_mail_t, $1_mail_tmp_t, { file dir })
kernel_read_system_state($1_mail_t)
corenet_all_recvfrom_netlabel($1_mail_t)
auth_use_nsswitch($1_mail_t)
logging_send_syslog_msg($1_mail_t)
optional_policy(`
postfix_domtrans_user_mail_handler($1_mail_t)
')
')
########################################
##
## Role access for mta
##
##
##
## Role allowed access
##
##
##
##
## User domain for the role
##
##
#
interface(`mta_role',`
gen_require(`
attribute mta_user_agent;
type user_mail_t, sendmail_exec_t;
')
role $1 types { user_mail_t mta_user_agent };
# Transition from the user domain to the derived domain.
domtrans_pattern($2, sendmail_exec_t, user_mail_t)
allow $2 sendmail_exec_t:lnk_file read_lnk_file_perms;
allow mta_user_agent $2:fd use;
allow mta_user_agent $2:process sigchld;
allow mta_user_agent $2:fifo_file rw_inherited_fifo_file_perms;
allow $2 user_mail_t:process signal;
optional_policy(`
exim_run($2, $1)
')
optional_policy(`
mailman_run(mta_user_agent, $1)
')
')
########################################
##
## Make the specified domain usable for a mail server.
##
##
##
## Type to be used as a mail server domain.
##
##
##
##
## Type of the program to be used as an entry point to this domain.
##
##
#
interface(`mta_mailserver',`
gen_require(`
attribute mailserver_domain;
')
init_daemon_domain($1, $2)
typeattribute $1 mailserver_domain;
')
########################################
##
## Make the specified type a MTA executable file.
##
##
##
## Type to be used as a mail client.
##
##
#
interface(`mta_agent_executable',`
gen_require(`
attribute mta_exec_type;
')
typeattribute $1 mta_exec_type;
application_executable_file($1)
')
######################################
##
## Dontaudit read and write an leaked file descriptors
##
##
##
## Domain to not audit.
##
##
#
interface(`mta_dontaudit_leaks_system_mail',`
gen_require(`
type system_mail_t;
')
dontaudit $1 system_mail_t:fifo_file write;
dontaudit $1 system_mail_t:tcp_socket { read write };
')
########################################
##
## Make the specified type by a system MTA.
##
##
##
## Type to be used as a mail client.
##
##
#
interface(`mta_system_content',`
gen_require(`
attribute mailcontent_type;
')
typeattribute $1 mailcontent_type;
')
########################################
##
## Modified mailserver interface for
## sendmail daemon use.
##
##
##
## A modified MTA mail server interface for
## the sendmail program. It's design does
## not fit well with policy, and using the
## regular interface causes a type_transition
## conflict if direct running of init scripts
## is enabled.
##
##
## This interface should most likely only be used
## by the sendmail policy.
##
##
##
##
## The type to be used for the mail server.
##
##
#
interface(`mta_sendmail_mailserver',`
gen_require(`
attribute mailserver_domain;
type sendmail_exec_t;
')
init_system_domain($1, sendmail_exec_t)
typeattribute $1 mailserver_domain;
')
#######################################
##
## Make a type a mailserver type used
## for sending mail.
##
##
##
## Mail server domain type used for sending mail.
##
##
#
interface(`mta_mailserver_sender',`
gen_require(`
attribute mailserver_sender;
')
typeattribute $1 mailserver_sender;
')
#######################################
##
## Make a type a mailserver type used
## for delivering mail to local users.
##
##
##
## Mail server domain type used for delivering mail.
##
##
#
interface(`mta_mailserver_delivery',`
gen_require(`
attribute mailserver_delivery;
')
typeattribute $1 mailserver_delivery;
userdom_home_manager($1)
optional_policy(`
mta_rw_delivery_tcp_sockets($1)
')
userdom_filetrans_home_content($1)
')
#######################################
##
## Make a type a mailserver type used
## for sending mail on behalf of local
## users to the local mail spool.
##
##
##
## Mail server domain type used for sending local mail.
##
##
#
interface(`mta_mailserver_user_agent',`
gen_require(`
attribute mta_user_agent;
')
typeattribute $1 mta_user_agent;
optional_policy(`
# apache should set close-on-exec
apache_dontaudit_rw_stream_sockets($1)
apache_dontaudit_rw_sys_script_stream_sockets($1)
')
')
########################################
##
## Send mail from the system.
##
##
##
## Domain allowed to transition.
##
##
#
interface(`mta_send_mail',`
gen_require(`
attribute mta_user_agent;
type system_mail_t;
attribute mta_exec_type;
')
allow $1 mta_exec_type:lnk_file read_lnk_file_perms;
corecmd_read_bin_symlinks($1)
domtrans_pattern($1, mta_exec_type, system_mail_t)
allow mta_user_agent $1:fd use;
allow mta_user_agent $1:process sigchld;
allow mta_user_agent $1:fifo_file rw_inherited_fifo_file_perms;
dontaudit mta_user_agent $1:unix_stream_socket rw_socket_perms;
')
########################################
##
## Execute send mail in a specified domain.
##
##
##
## Execute send mail in a specified domain.
##
##
## No interprocess communication (signals, pipes,
## etc.) is provided by this interface since
## the domains are not owned by this module.
##
##
##
##
## Domain allowed to transition.
##
##
##
##
## Domain to transition to.
##
##
#
interface(`mta_sendmail_domtrans',`
gen_require(`
attribute mta_exec_type;
attribute mta_user_agent;
')
files_search_usr($1)
allow $1 mta_exec_type:lnk_file read_lnk_file_perms;
corecmd_read_bin_symlinks($1)
allow $2 mta_exec_type:file entrypoint;
domtrans_pattern($1, mta_exec_type, $2)
allow mta_user_agent $1:fd use;
allow mta_user_agent $1:process sigchld;
allow mta_user_agent $1:fifo_file rw_inherited_fifo_file_perms;
')
########################################
##
## Send system mail client a signal
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_signal_system_mail',`
gen_require(`
type system_mail_t;
')
allow $1 system_mail_t:process signal;
')
########################################
##
## Allow role to access system_mail_t.
##
##
##
## Role allowed access.
##
##
#
interface(`mta_role_access_system_mail',`
gen_require(`
type system_mail_t;
')
role $1 types system_mail_t;
')
########################################
##
## Send all user mail client a signal
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_signal_user_agent',`
gen_require(`
attribute mta_user_agent;
')
allow $1 mta_user_agent:process signal;
')
########################################
##
## Send all user mail client a kill signal
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_kill_user_agent',`
gen_require(`
attribute mta_user_agent;
')
allow $1 mta_user_agent:process sigkill;
')
########################################
##
## Send system mail client a kill signal
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_kill_system_mail',`
gen_require(`
type system_mail_t;
')
allow $1 system_mail_t:process sigkill;
')
########################################
##
## Execute sendmail in the caller domain.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_sendmail_exec',`
gen_require(`
type sendmail_exec_t;
')
can_exec($1, sendmail_exec_t)
')
########################################
##
## Check whether sendmail executable
## files are executable.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_sendmail_access_check',`
gen_require(`
type sendmail_exec_t;
')
corecmd_search_bin($1)
allow $1 sendmail_exec_t:file { getattr_file_perms execute };
')
########################################
##
## Read mail server configuration.
##
##
##
## Domain allowed access.
##
##
##
#
interface(`mta_read_config',`
gen_require(`
type etc_mail_t;
')
files_search_etc($1)
allow $1 etc_mail_t:dir list_dir_perms;
read_files_pattern($1, etc_mail_t, etc_mail_t)
read_lnk_files_pattern($1, etc_mail_t, etc_mail_t)
')
########################################
##
## write mail server configuration.
##
##
##
## Domain allowed access.
##
##
##
#
interface(`mta_write_config',`
gen_require(`
type etc_mail_t;
')
write_files_pattern($1, etc_mail_t, etc_mail_t)
')
########################################
##
## Manage mail server configuration.
##
##
##
## Domain allowed access.
##
##
##
#
interface(`mta_manage_config',`
gen_require(`
type etc_mail_t;
')
manage_files_pattern($1, etc_mail_t, etc_mail_t)
')
########################################
##
## Read mail address aliases.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_read_aliases',`
gen_require(`
type etc_aliases_t;
')
files_search_etc($1)
allow $1 etc_aliases_t:file read_file_perms;
allow $1 etc_aliases_t:lnk_file read_lnk_file_perms;
')
########################################
##
## Mmap mail address aliases.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_map_aliases',`
gen_require(`
type etc_aliases_t;
')
allow $1 etc_aliases_t:file map;
')
########################################
##
## Create, read, write, and delete mail address aliases.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_manage_aliases',`
gen_require(`
type etc_aliases_t;
')
files_search_etc($1)
manage_files_pattern($1, etc_aliases_t, etc_aliases_t)
manage_lnk_files_pattern($1, etc_aliases_t, etc_aliases_t)
mta_filetrans_named_content($1)
')
########################################
##
## Type transition files created in /etc
## to the mail address aliases type.
##
##
##
## Domain allowed access.
##
##
##
##
## The name of the object being created.
##
##
#
interface(`mta_etc_filetrans_aliases',`
gen_require(`
type etc_aliases_t;
')
files_etc_filetrans($1, etc_aliases_t, file, $2)
')
########################################
##
## Read and write mail aliases.
##
##
##
## Domain allowed access.
##
##
##
#
interface(`mta_rw_aliases',`
gen_require(`
type etc_aliases_t;
')
files_search_etc($1)
allow $1 etc_aliases_t:file { rw_file_perms setattr_file_perms };
')
#######################################
##
## Do not audit attempts to read and write TCP
## sockets of mail delivery domains.
##
##
##
## Domain to not audit.
##
##
#
interface(`mta_dontaudit_rw_delivery_tcp_sockets',`
gen_require(`
attribute mailserver_delivery;
')
dontaudit $1 mailserver_delivery:tcp_socket { read write };
')
######################################
##
## Allow attempts to read and write TCP
## sockets of mail delivery domains.
##
##
##
## Domain to not audit.
##
##
#
interface(`mta_rw_delivery_tcp_sockets',`
gen_require(`
attribute mailserver_delivery;
')
allow $1 mailserver_delivery:tcp_socket { read write };
')
#######################################
##
## Connect to all mail servers over TCP. (Deprecated)
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_tcp_connect_all_mailservers',`
refpolicywarn(`$0($*) has been deprecated.')
')
#######################################
##
## Do not audit attempts to read a symlink
## in the mail spool.
##
##
##
## Domain to not audit.
##
##
#
interface(`mta_dontaudit_read_spool_symlinks',`
gen_require(`
type mail_spool_t;
')
dontaudit $1 mail_spool_t:lnk_file read;
')
########################################
##
## Get the attributes of mail spool files.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_getattr_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
allow $1 mail_spool_t:dir list_dir_perms;
getattr_files_pattern($1, mail_spool_t, mail_spool_t)
read_lnk_files_pattern($1, mail_spool_t, mail_spool_t)
')
########################################
##
## Do not audit attempts to get the attributes
## of mail spool files.
##
##
##
## Domain to not audit.
##
##
#
interface(`mta_dontaudit_getattr_spool_files',`
gen_require(`
type mail_spool_t;
')
files_dontaudit_search_spool($1)
dontaudit $1 mail_spool_t:dir search_dir_perms;
dontaudit $1 mail_spool_t:lnk_file read_lnk_file_perms;
dontaudit $1 mail_spool_t:file getattr_file_perms;
')
#######################################
##
## Create private objects in the
## mail spool directory.
##
##
##
## Domain allowed access.
##
##
##
##
## The type of the object to be created.
##
##
##
##
## The object class of the object being created.
##
##
##
##
## The name of the object being created.
##
##
#
interface(`mta_spool_filetrans',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
filetrans_pattern($1, mail_spool_t, $2, $3, $4)
')
#######################################
##
## Read the mail spool.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_read_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
read_files_pattern($1, mail_spool_t, mail_spool_t)
')
########################################
##
## Read and write the mail spool.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_rw_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
allow $1 mail_spool_t:dir list_dir_perms;
allow $1 mail_spool_t:file setattr_file_perms;
manage_files_pattern($1, mail_spool_t, mail_spool_t)
read_lnk_files_pattern($1, mail_spool_t, mail_spool_t)
')
#######################################
##
## Create, read, and write the mail spool.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_append_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
allow $1 mail_spool_t:dir list_dir_perms;
create_files_pattern($1, mail_spool_t, mail_spool_t)
write_files_pattern($1, mail_spool_t, mail_spool_t)
read_lnk_files_pattern($1, mail_spool_t, mail_spool_t)
')
#######################################
##
## Delete from the mail spool.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_delete_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
delete_files_pattern($1, mail_spool_t, mail_spool_t)
')
########################################
##
## Create, read, write, and delete mail spool files.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_manage_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
manage_dirs_pattern($1, mail_spool_t, mail_spool_t)
manage_files_pattern($1, mail_spool_t, mail_spool_t)
manage_lnk_files_pattern($1, mail_spool_t, mail_spool_t)
allow $1 mail_spool_t:file map;
')
########################################
##
## Search mail queue dirs.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_search_queue',`
gen_require(`
type mqueue_spool_t;
')
files_search_spool($1)
allow $1 mqueue_spool_t:dir search_dir_perms;
')
#######################################
##
## List the mail queue.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_list_queue',`
gen_require(`
type mqueue_spool_t;
')
allow $1 mqueue_spool_t:dir list_dir_perms;
files_search_spool($1)
')
#######################################
##
## Read the mail queue.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_read_queue',`
gen_require(`
type mqueue_spool_t;
')
read_files_pattern($1, mqueue_spool_t, mqueue_spool_t)
files_search_spool($1)
')
#######################################
##
## Do not audit attempts to read and
## write the mail queue.
##
##
##
## Domain to not audit.
##
##
#
interface(`mta_dontaudit_rw_queue',`
gen_require(`
type mqueue_spool_t;
')
dontaudit $1 mqueue_spool_t:dir search_dir_perms;
dontaudit $1 mqueue_spool_t:file rw_file_perms;
')
########################################
##
## Create, read, write, and delete
## mail queue files.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_manage_queue',`
gen_require(`
type mqueue_spool_t;
')
files_search_spool($1)
manage_dirs_pattern($1, mqueue_spool_t, mqueue_spool_t)
manage_files_pattern($1, mqueue_spool_t, mqueue_spool_t)
')
#######################################
##
## Create private objects in the
## mqueue spool directory.
##
##
##
## Domain allowed access.
##
##
##
##
## The type of the object to be created.
##
##
##
##
## The object class of the object being created.
##
##
##
##
## The name of the object being created.
##
##
#
interface(`mta_spool_filetrans_queue',`
gen_require(`
type mqueue_spool_t;
')
files_search_spool($1)
filetrans_pattern($1, mqueue_spool_t, $2, $3, $4)
')
#######################################
##
## Read sendmail binary.
##
##
##
## Domain allowed access.
##
##
#
# cjp: added for postfix
interface(`mta_read_sendmail_bin',`
gen_require(`
type sendmail_exec_t;
')
allow $1 sendmail_exec_t:file read_file_perms;
')
#######################################
##
## Read and write unix domain stream sockets
## of user mail domains.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_rw_user_mail_stream_sockets',`
gen_require(`
attribute user_mail_domain;
')
allow $1 user_mail_domain:unix_stream_socket rw_socket_perms;
')
########################################
##
## Type transition files created in calling dir
## to the mail address aliases type.
##
##
##
## Domain allowed access.
##
##
##
##
## Directory to transition on.
##
##
#
interface(`mta_filetrans_aliases',`
gen_require(`
type etc_aliases_t;
')
filetrans_pattern($1, $2, etc_aliases_t, file)
')
######################################
##
## ALlow domain to append mail content in the homedir
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_append_home',`
gen_require(`
type mail_home_t;
')
userdom_search_user_home_dirs($1)
append_files_pattern($1, mail_home_t, mail_home_t)
ifdef(`distro_redhat',`
userdom_search_admin_dir($1)
')
')
######################################
##
## ALlow domain to read mail content in the homedir
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_read_home',`
gen_require(`
type mail_home_t;
')
userdom_search_user_home_dirs($1)
read_files_pattern($1, mail_home_t, mail_home_t)
ifdef(`distro_redhat',`
userdom_search_admin_dir($1)
')
')
####################################
##
## ALlow domain to mmap mail content in the homedir
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_mmap_home_rw',`
gen_require(`
type mail_home_rw_t;
')
allow $1 mail_home_rw_t:file map;
')
####################################
##
## ALlow domain to read mail content in the homedir
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_read_home_rw',`
gen_require(`
type mail_home_rw_t;
')
userdom_search_user_home_dirs($1)
read_files_pattern($1, mail_home_rw_t, mail_home_rw_t)
list_dirs_pattern($1, mail_home_rw_t, mail_home_rw_t)
read_lnk_files_pattern($1, mail_home_rw_t, mail_home_rw_t)
ifdef(`distro_redhat',`
userdom_search_admin_dir($1)
')
')
####################################
##
## Allow domain to manage mail content in the homedir
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_manage_home_rw',`
gen_require(`
type mail_home_rw_t;
')
userdom_search_user_home_dirs($1)
userdom_search_admin_dir($1)
manage_files_pattern($1, mail_home_rw_t, mail_home_rw_t)
manage_dirs_pattern($1, mail_home_rw_t, mail_home_rw_t)
manage_lnk_files_pattern($1, mail_home_rw_t, mail_home_rw_t)
userdom_user_home_dir_filetrans($1, mail_home_rw_t, dir, "Maildir")
ifdef(`distro_redhat',`
userdom_search_admin_dir($1)
userdom_admin_home_dir_filetrans($1, mail_home_rw_t, dir, "Maildir")
')
')
########################################
##
## create mail content in the in the /root directory
## with an correct label.
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_filetrans_admin_home_content',`
gen_require(`
type mail_home_t;
type mail_home_rw_t;
')
userdom_admin_home_dir_filetrans($1, mail_home_t, file, "dead.letter")
userdom_admin_home_dir_filetrans($1, mail_home_t, file, ".esmtprc")
userdom_admin_home_dir_filetrans($1, mail_home_t, file, ".mailrc")
userdom_admin_home_dir_filetrans($1, mail_home_t, file, ".forward")
userdom_admin_home_dir_filetrans($1, mail_home_rw_t, dir, "Maildir")
userdom_admin_home_dir_filetrans($1, mail_home_rw_t, dir, ".maildir")
userdom_admin_home_dir_filetrans($1, mail_home_rw_t, file, ".esmtp_queue")
userdom_admin_home_dir_filetrans($1, mail_home_rw_t, dir, ".esmtp_queue")
')
########################################
##
## Transition to mta named home content
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_filetrans_home_content',`
gen_require(`
type mail_home_t;
type mail_home_rw_t;
')
userdom_user_home_dir_filetrans($1, mail_home_t, file, ".esmtprc")
userdom_user_home_dir_filetrans($1, mail_home_t, file, ".mailrc")
userdom_user_home_dir_filetrans($1, mail_home_t, file, "dead.letter")
userdom_user_home_dir_filetrans($1, mail_home_t, file, ".forward")
userdom_user_home_dir_filetrans($1, mail_home_rw_t, dir, "Maildir")
userdom_user_home_dir_filetrans($1, mail_home_rw_t, dir, ".maildir")
userdom_user_home_dir_filetrans($1, mail_home_rw_t, file, ".esmtp_queue")
userdom_user_home_dir_filetrans($1, mail_home_rw_t, dir, ".esmtp_queue")
')
########################################
##
## Transition to mta named content
##
##
##
## Domain allowed access.
##
##
#
interface(`mta_filetrans_named_content',`
gen_require(`
type etc_aliases_t;
type etc_mail_t;
')
#filetrans_pattern($1, etc_mail_t, etc_aliases_t, { dir file })
mta_etc_filetrans_aliases($1, "aliases")
mta_etc_filetrans_aliases($1, "aliases.db")
mta_etc_filetrans_aliases($1, "aliasesdb-stamp")
mta_etc_filetrans_aliases($1, "__db.aliases.db")
mta_etc_filetrans_aliases($1, "virtusertable.db")
mta_etc_filetrans_aliases($1, "access.db")
mta_etc_filetrans_aliases($1, "domaintable.db")
filetrans_pattern($1, etc_mail_t, etc_aliases_t, file, "virtusertable.db")
filetrans_pattern($1, etc_mail_t, etc_aliases_t, file, "access.db")
filetrans_pattern($1, etc_mail_t, etc_aliases_t, file, "domaintable.db")
filetrans_pattern($1, etc_mail_t, etc_aliases_t, file, "mailertable.db")
filetrans_pattern($1, etc_mail_t, etc_aliases_t, file, "aliasesdb-stamp")
mta_filetrans_home_content($1)
mta_filetrans_admin_home_content($1)
')