selinux-policy/policy/modules/services/mta.if

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## <summary>Policy common to all email tranfer agents.</summary>
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########################################
## <summary>
## MTA stub interface. No access allowed.
## </summary>
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## <param name="domain" unused="true">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
interface(`mta_stub',`
gen_require(`
type sendmail_exec_t;
')
')
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#######################################
## <summary>
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## Basic mail transfer agent domain template.
## </summary>
## <desc>
## <p>
## This template creates a derived domain which is
## a email transfer agent, which sends mail on
## behalf of the user.
## </p>
## <p>
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## This is the basic types and rules, common
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## to the system agent and user agents.
## </p>
## </desc>
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## <param name="domain_prefix">
## <summary>
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## The prefix of the domain (e.g., user
## is the prefix for user_t).
## </summary>
## </param>
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#
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template(`mta_base_mail_template',`
gen_require(`
attribute user_mail_domain;
type sendmail_exec_t;
')
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##############################
#
# $1_mail_t declarations
#
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type $1_mail_t, user_mail_domain;
application_domain($1_mail_t, sendmail_exec_t)
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type $1_mail_tmp_t;
files_tmp_file($1_mail_tmp_t)
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##############################
#
# $1_mail_t local policy
#
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allow $1_mail_t self:capability { setuid setgid chown };
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allow $1_mail_t self:process { signal_perms setrlimit };
allow $1_mail_t self:tcp_socket create_socket_perms;
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# re-exec itself
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can_exec($1_mail_t, sendmail_exec_t)
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allow $1_mail_t sendmail_exec_t:lnk_file read_lnk_file_perms;
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kernel_read_system_state($1_mail_t)
kernel_read_kernel_sysctls($1_mail_t)
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corenet_all_recvfrom_unlabeled($1_mail_t)
corenet_all_recvfrom_netlabel($1_mail_t)
corenet_tcp_sendrecv_generic_if($1_mail_t)
corenet_tcp_sendrecv_generic_node($1_mail_t)
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corenet_tcp_sendrecv_all_ports($1_mail_t)
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corenet_tcp_connect_all_ports($1_mail_t)
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corenet_tcp_connect_smtp_port($1_mail_t)
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corenet_sendrecv_smtp_client_packets($1_mail_t)
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corecmd_exec_bin($1_mail_t)
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files_read_etc_files($1_mail_t)
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files_search_spool($1_mail_t)
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# It wants to check for nscd
files_dontaudit_search_pids($1_mail_t)
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auth_use_nsswitch($1_mail_t)
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init_dontaudit_rw_utmp($1_mail_t)
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logging_send_syslog_msg($1_mail_t)
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miscfiles_read_localization($1_mail_t)
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optional_policy(`
exim_read_log($1_mail_t)
exim_append_log($1_mail_t)
exim_manage_spool_files($1_mail_t)
')
optional_policy(`
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postfix_domtrans_user_mail_handler($1_mail_t)
')
optional_policy(`
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procmail_exec($1_mail_t)
')
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optional_policy(`
qmail_domtrans_inject($1_mail_t)
')
optional_policy(`
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gen_require(`
type etc_mail_t, mail_spool_t, mqueue_spool_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)
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files_tmp_filetrans($1_mail_t, $1_mail_tmp_t, { file dir })
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allow $1_mail_t etc_mail_t:dir search_dir_perms;
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# Write to /var/spool/mail and /var/spool/mqueue.
manage_files_pattern($1_mail_t, mail_spool_t, mail_spool_t)
manage_files_pattern($1_mail_t, mqueue_spool_t, mqueue_spool_t)
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# Check available space.
fs_getattr_xattr_fs($1_mail_t)
files_read_etc_runtime_files($1_mail_t)
# Write to /var/log/sendmail.st
sendmail_manage_log($1_mail_t)
sendmail_create_log($1_mail_t)
')
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optional_policy(`
uucp_manage_spool($1_mail_t)
')
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')
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########################################
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## <summary>
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## Role access for mta
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## </summary>
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## <param name="role">
## <summary>
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## Role allowed access
## </summary>
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## </param>
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## <param name="domain">
## <summary>
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## User domain for the role
## </summary>
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## </param>
#
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interface(`mta_role',`
gen_require(`
attribute mta_user_agent;
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type user_mail_t, sendmail_exec_t;
')
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role $1 types { user_mail_t mta_user_agent };
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# Transition from the user domain to the derived domain.
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domtrans_pattern($2, sendmail_exec_t, user_mail_t)
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allow $2 sendmail_exec_t:lnk_file { getattr read };
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allow mta_user_agent $2:fd use;
allow mta_user_agent $2:process sigchld;
allow mta_user_agent $2:fifo_file { read write };
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')
########################################
## <summary>
## Make the specified domain usable for a mail server.
## </summary>
## <param name="type">
## <summary>
## Type to be used as a mail server domain.
## </summary>
## </param>
## <param name="entry_point">
## <summary>
## Type of the program to be used as an entry point to this domain.
## </summary>
## </param>
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#
interface(`mta_mailserver',`
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gen_require(`
attribute mailserver_domain;
')
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init_daemon_domain($1, $2)
typeattribute $1 mailserver_domain;
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')
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########################################
## <summary>
## Make the specified type a MTA executable file.
## </summary>
## <param name="type">
## <summary>
## Type to be used as a mail client.
## </summary>
## </param>
#
interface(`mta_agent_executable',`
gen_require(`
attribute mta_exec_type;
')
typeattribute $1 mta_exec_type;
application_executable_file($1)
')
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######################################
## <summary>
## Dontaudit read and write an leaked file descriptors
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
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 };
')
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########################################
## <summary>
## Make the specified type by a system MTA.
## </summary>
## <param name="type">
## <summary>
## Type to be used as a mail client.
## </summary>
## </param>
#
interface(`mta_system_content',`
gen_require(`
attribute mailcontent_type;
')
typeattribute $1 mailcontent_type;
')
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########################################
## <summary>
## Modified mailserver interface for
## sendmail daemon use.
## </summary>
## <desc>
## <p>
## 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.
## </p>
## <p>
## This interface should most likely only be used
## by the sendmail policy.
## </p>
## </desc>
## <param name="domain">
## <summary>
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## The type to be used for the mail server.
## </summary>
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## </param>
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#
interface(`mta_sendmail_mailserver',`
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gen_require(`
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attribute mailserver_domain;
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type sendmail_exec_t;
')
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init_system_domain($1, sendmail_exec_t)
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typeattribute $1 mailserver_domain;
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')
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#######################################
## <summary>
## Make a type a mailserver type used
## for sending mail.
## </summary>
## <param name="domain">
## <summary>
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## Mail server domain type used for sending mail.
## </summary>
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## </param>
#
interface(`mta_mailserver_sender',`
gen_require(`
attribute mailserver_sender;
')
typeattribute $1 mailserver_sender;
')
#######################################
## <summary>
## Make a type a mailserver type used
## for delivering mail to local users.
## </summary>
## <param name="domain">
## <summary>
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## Mail server domain type used for delivering mail.
## </summary>
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## </param>
#
interface(`mta_mailserver_delivery',`
gen_require(`
attribute mailserver_delivery;
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type mail_spool_t;
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')
typeattribute $1 mailserver_delivery;
')
#######################################
## <summary>
## Make a type a mailserver type used
## for sending mail on behalf of local
## users to the local mail spool.
## </summary>
## <param name="domain">
## <summary>
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## Mail server domain type used for sending local mail.
## </summary>
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## </param>
#
interface(`mta_mailserver_user_agent',`
gen_require(`
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attribute mta_user_agent;
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')
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typeattribute $1 mta_user_agent;
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')
########################################
## <summary>
## Send mail from the system.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
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#
interface(`mta_send_mail',`
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gen_require(`
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attribute mta_user_agent;
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type system_mail_t;
attribute mta_exec_type;
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')
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allow $1 mta_exec_type:lnk_file read_lnk_file_perms;
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corecmd_read_bin_symlinks($1)
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domtrans_pattern($1, mta_exec_type, system_mail_t)
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allow mta_user_agent $1:fd use;
allow mta_user_agent $1:process sigchld;
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allow mta_user_agent $1:fifo_file rw_fifo_file_perms;
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ifdef(`hide_broken_symptoms', `
dontaudit system_mail_t $1:socket_class_set { read write };
')
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')
########################################
## <summary>
## Execute send mail in a specified domain.
## </summary>
## <desc>
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## <p>
## Execute send mail in a specified domain.
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## </p>
## <p>
## No interprocess communication (signals, pipes,
## etc.) is provided by this interface since
## the domains are not owned by this module.
## </p>
## </desc>
## <param name="source_domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
## <param name="target_domain">
## <summary>
## Domain to transition to.
## </summary>
## </param>
#
interface(`mta_sendmail_domtrans',`
gen_require(`
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attribute mta_exec_type;
')
files_search_usr($1)
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allow $1 mta_exec_type:lnk_file read_lnk_file_perms;
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corecmd_read_bin_symlinks($1)
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allow $2 mta_exec_type:file entrypoint;
domtrans_pattern($1, mta_exec_type, $2)
')
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########################################
## <summary>
## Send system mail client a signal
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
#
interface(`mta_signal_system_mail',`
gen_require(`
type system_mail_t;
')
allow $1 system_mail_t:process signal;
')
########################################
## <summary>
## Execute sendmail in the caller domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
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#
interface(`mta_sendmail_exec',`
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gen_require(`
type sendmail_exec_t;
')
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can_exec($1, sendmail_exec_t)
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')
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########################################
## <summary>
## Read mail server configuration.
## </summary>
## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
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## <rolecap/>
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#
interface(`mta_read_config',`
gen_require(`
type etc_mail_t;
')
files_search_etc($1)
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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)
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')
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########################################
## <summary>
## write mail server configuration.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`mta_write_config',`
gen_require(`
type etc_mail_t;
')
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manage_files_pattern($1, etc_mail_t, etc_mail_t)
allow $1 etc_mail_t:file setattr;
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')
########################################
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## <summary>
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## Read mail address aliases.
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## </summary>
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## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
interface(`mta_read_aliases',`
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gen_require(`
type etc_aliases_t;
')
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files_search_etc($1)
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allow $1 etc_aliases_t:file read_file_perms;
')
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########################################
## <summary>
## Create, read, write, and delete mail address aliases.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
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)
')
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########################################
## <summary>
## Type transition files created in /etc
## to the mail address aliases type.
## </summary>
## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
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interface(`mta_etc_filetrans_aliases',`
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gen_require(`
type etc_aliases_t;
')
files_etc_filetrans($1, etc_aliases_t, file)
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')
########################################
## <summary>
## Read and write mail aliases.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
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## <rolecap/>
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#
interface(`mta_rw_aliases',`
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gen_require(`
type etc_aliases_t;
')
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files_search_etc($1)
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allow $1 etc_aliases_t:file { rw_file_perms setattr };
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')
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#######################################
## <summary>
## Do not audit attempts to read and write TCP
## sockets of mail delivery domains.
## </summary>
## <param name="domain">
## <summary>
## Domain to not audit.
## </summary>
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## </param>
#
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interface(`mta_dontaudit_rw_delivery_tcp_sockets',`
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gen_require(`
attribute mailserver_delivery;
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')
dontaudit $1 mailserver_delivery:tcp_socket { read write };
')
#######################################
## <summary>
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## Connect to all mail servers over TCP. (Deprecated)
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## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
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## </param>
#
interface(`mta_tcp_connect_all_mailservers',`
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refpolicywarn(`$0($*) has been deprecated.')
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')
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#######################################
## <summary>
## Do not audit attempts to read a symlink
## in the mail spool.
## </summary>
## <param name="domain">
## <summary>
## Domain to not audit.
## </summary>
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## </param>
#
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interface(`mta_dontaudit_read_spool_symlinks',`
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gen_require(`
type mail_spool_t;
')
dontaudit $1 mail_spool_t:lnk_file read;
')
########################################
## <summary>
## Get the attributes of mail spool files.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`mta_getattr_spool',`
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gen_require(`
type mail_spool_t;
')
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files_search_spool($1)
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allow $1 mail_spool_t:dir list_dir_perms;
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getattr_files_pattern($1, mail_spool_t, mail_spool_t)
read_lnk_files_pattern($1, mail_spool_t, mail_spool_t)
')
########################################
## <summary>
## Do not audit attempts to get the attributes
## of mail spool files.
## </summary>
## <param name="domain">
## <summary>
## Domain to not audit.
## </summary>
## </param>
#
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interface(`mta_dontaudit_getattr_spool_files',`
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gen_require(`
type mail_spool_t;
')
files_dontaudit_search_spool($1)
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dontaudit $1 mail_spool_t:dir search_dir_perms;
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dontaudit $1 mail_spool_t:lnk_file read;
dontaudit $1 mail_spool_t:file getattr;
')
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#######################################
## <summary>
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## Create private objects in the
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## mail spool directory.
## </summary>
## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
## <param name="private type">
## <summary>
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## The type of the object to be created.
## </summary>
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## </param>
## <param name="object">
## <summary>
## The object class of the object being created.
## </summary>
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## </param>
#
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interface(`mta_spool_filetrans',`
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gen_require(`
type mail_spool_t;
')
files_search_spool($1)
filetrans_pattern($1, mail_spool_t, $2, $3)
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')
########################################
## <summary>
## Read and write the mail spool.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`mta_rw_spool',`
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gen_require(`
type mail_spool_t;
')
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files_search_spool($1)
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allow $1 mail_spool_t:dir list_dir_perms;
allow $1 mail_spool_t:file setattr;
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manage_files_pattern($1, mail_spool_t, mail_spool_t)
read_lnk_files_pattern($1, mail_spool_t, mail_spool_t)
')
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#######################################
## <summary>
## Create, read, and write the mail spool.
## </summary>
## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
interface(`mta_append_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
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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)
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')
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#######################################
## <summary>
## Delete from the mail spool.
## </summary>
## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
interface(`mta_delete_spool',`
gen_require(`
type mail_spool_t;
')
files_search_spool($1)
delete_files_pattern($1, mail_spool_t, mail_spool_t)
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')
########################################
## <summary>
## Create, read, write, and delete mail spool files.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
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#
interface(`mta_manage_spool',`
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gen_require(`
type mail_spool_t;
')
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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)
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')
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########################################
## <summary>
## Search mail queue dirs.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`mta_search_queue',`
gen_require(`
type mqueue_spool_t;
')
files_search_spool($1)
allow $1 mqueue_spool_t:dir search_dir_perms;
')
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#######################################
## <summary>
## List the mail queue.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`mta_list_queue',`
gen_require(`
type mqueue_spool_t;
')
allow $1 mqueue_spool_t:dir list_dir_perms;
files_search_spool($1)
')
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#######################################
## <summary>
## Read the mail queue.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`mta_read_queue',`
gen_require(`
type mqueue_spool_t;
')
read_files_pattern($1, mqueue_spool_t, mqueue_spool_t)
files_search_spool($1)
')
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#######################################
## <summary>
## Do not audit attempts to read and
## write the mail queue.
## </summary>
## <param name="domain">
## <summary>
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## Domain to not audit.
## </summary>
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## </param>
#
interface(`mta_dontaudit_rw_queue',`
gen_require(`
type mqueue_spool_t;
')
dontaudit $1 mqueue_spool_t:dir search_dir_perms;
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dontaudit $1 mqueue_spool_t:file { getattr read write };
')
########################################
## <summary>
## Create, read, write, and delete
## mail queue files.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
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#
interface(`mta_manage_queue',`
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gen_require(`
type mqueue_spool_t;
')
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files_search_spool($1)
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manage_dirs_pattern($1, mqueue_spool_t, mqueue_spool_t)
manage_files_pattern($1, mqueue_spool_t, mqueue_spool_t)
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')
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#######################################
## <summary>
## Read sendmail binary.
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## </summary>
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## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
# cjp: added for postfix
interface(`mta_read_sendmail_bin',`
gen_require(`
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type sendmail_exec_t;
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')
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allow $1 sendmail_exec_t:file read_file_perms;
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')
#######################################
## <summary>
## Read and write unix domain stream sockets
## of user mail domains.
## </summary>
## <param name="domain">
## <summary>
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## Domain allowed access.
## </summary>
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## </param>
#
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interface(`mta_rw_user_mail_stream_sockets',`
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gen_require(`
attribute user_mail_domain;
')
allow $1 user_mail_domain:unix_stream_socket rw_socket_perms;
')
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########################################
## <summary>
## Type transition files created in calling dir
## to the mail address aliases type.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <param name="domain">
## <summary>
## Directory to transition on.
## </summary>
## </param>
#
interface(`mta_filetrans_aliases',`
filetrans_pattern($1, $2, etc_aliases_t, file)
')
######################################
## <summary>
## ALlow domain to read mail content in the homedir
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`mta_read_home',`
gen_require(`
type mail_home_t;
')
userdom_search_user_home_dirs($1)
userdom_search_admin_dir($1)
read_files_pattern($1, mail_home_t, mail_home_t)
')