225 lines
6.9 KiB
Plaintext
225 lines
6.9 KiB
Plaintext
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policy_module(mta,1.0)
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########################################
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#
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# Declarations
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#
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type etc_aliases_t;
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files_make_file(etc_aliases_t)
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type etc_mail_t;
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files_make_file(etc_mail_t)
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attribute mailserver_domain;
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type mqueue_spool_t;
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files_make_file(mqueue_spool_t)
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type mail_spool_t;
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files_make_file(mail_spool_t)
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type sendmail_exec_t;
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files_make_file(sendmail_exec_t)
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type system_mail_t; #, user_mail_domain, nscd_client_domain;
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domain_make_domain(system_mail_t)
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role system_r types system_mail_t;
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ifdef(`targeted_policy',`',`
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optional_policy(`sendmail.te', `
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domain_make_entrypoint_file(system_mail_t,sendmail_exec_t)
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', `
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init_make_system_domain(system_mail_t,sendmail_exec_t)
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') dnl end if sendmail
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') dnl end targeted_policy
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########################################
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#
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# System mail local policy
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#
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allow system_mail_t self:capability { setuid setgid chown };
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allow system_mail_t self:process { signal_perms setrlimit };
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allow system_mail_t self:tcp_socket create_socket_perms;
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# re-exec itself
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can_exec(system_mail_t, sendmail_exec_t)
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allow system_mail_t sendmail_exec_t:lnk_file r_file_perms;
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kernel_read_kernel_sysctl(system_mail_t)
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kernel_read_system_state(system_mail_t)
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kernel_read_network_state(system_mail_t)
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corenet_tcp_sendrecv_all_if(system_mail_t)
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corenet_raw_sendrecv_all_if(system_mail_t)
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corenet_tcp_sendrecv_all_nodes(system_mail_t)
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corenet_raw_sendrecv_all_nodes(system_mail_t)
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corenet_tcp_bind_all_nodes(system_mail_t)
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corenet_tcp_sendrecv_all_ports(system_mail_t)
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dev_read_urand(system_mail_t)
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fs_getattr_xattr_fs(system_mail_t)
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init_script_use_pseudoterminal(system_mail_t)
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files_read_runtime_system_config(system_mail_t)
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files_read_general_system_config(system_mail_t)
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# It wants to check for nscd
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files_ignore_search_runtime_data_directory(system_mail_t)
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corecommands_execute_general_programs(system_mail_t)
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libraries_use_dynamic_loader(system_mail_t)
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libraries_use_shared_libraries(system_mail_t)
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logging_send_system_log_message(system_mail_t)
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miscfiles_read_localization(system_mail_t)
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sysnetwork_read_network_config(system_mail_t)
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tunable_policy(`use_dns',`
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allow system_mail_t self:udp_socket create_socket_perms;
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corenet_udp_sendrecv_all_if(system_mail_t)
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corenet_udp_sendrecv_all_nodes(system_mail_t)
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corenet_udp_bind_all_nodes(system_mail_t)
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corenet_udp_sendrecv_dns_port(system_mail_t)
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')
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optional_policy(`procmail.te',`
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procmail_execute(system_mail_t)
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')
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ifdef(`TODO',`
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optional_policy(`sendmail.te',`
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allow system_mail_t etc_mail_t:dir { getattr search };
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allow system_mail_t etc_runtime_t:file { getattr read };
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allow system_mail_t proc_t:dir search;
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allow system_mail_t proc_t:file { getattr read };
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allow system_mail_t proc_t:lnk_file read;
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dontaudit system_mail_t proc_net_t:dir search;
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allow system_mail_t fs_t:filesystem getattr;
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allow system_mail_t var_t:dir getattr;
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allow system_mail_t var_spool_t:dir getattr;
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dontaudit system_mail_t userpty_type:chr_file { getattr read write };
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# sendmail -q
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allow system_mail_t mqueue_spool_t:dir rw_dir_perms;
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allow system_mail_t mqueue_spool_t:file create_file_perms;
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ifdef(`crond.te', `
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dontaudit system_mail_t system_crond_tmp_t:file append;
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')
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') dnl end if sendmail
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can_ypbind(system_mail_t)
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allow system_mail_t device_t:dir search;
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allow system_mail_t { var_t var_spool_t }:dir search;
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allow system_mail_t sbin_t:dir search;
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# Transition from a system domain to the derived domain.
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domain_auto_trans(privmail, sendmail_exec_t, system_mail_t)
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allow privmail sendmail_exec_t:lnk_file { getattr read };
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ifdef(`crond.te', `
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# Read cron temporary files.
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allow system_mail_t system_crond_tmp_t:file r_file_perms;
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allow mta_user_agent system_crond_tmp_t:file r_file_perms;
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')
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ifdef(`qmail.te', `
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allow system_mail_t qmail_etc_t:dir search;
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allow system_mail_t qmail_etc_t:{ file lnk_file } read;
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')dnl end if qmail
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ifdef(`targeted_policy', `
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# rules are currently defined in sendmail.te, but it is not included in
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# targeted policy. We could move these rules permanantly here.
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ifdef(`postfix.te', `', `
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domain_execute_all_entrypoint_programs(system_mail_t)
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files_execute_system_config_script(system_mail_t)
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corecommands_execute_general_programs(system_mail_t)
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corecommands_execute_system_programs(system_mail_t)
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libraries_use_dynamic_loader(system_mail_t)
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libraries_use_shared_libraries(system_mail_t)
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libraries_execute_dynamic_loader(system_mail_t)
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libraries_execute_library_scripts(system_mail_t)
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')
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allow system_mail_t { var_t var_spool_t }:dir getattr;
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allow system_mail_t mqueue_spool_t:dir create_dir_perms;
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allow system_mail_t mqueue_spool_t:file create_file_perms;
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allow system_mail_t mqueue_spool_t:lnk_file create_lnk_perms;
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allow system_mail_t mail_spool_t:dir create_dir_perms;
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allow system_mail_t mail_spool_t:file create_file_perms;
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allow system_mail_t mail_spool_t:lnk_file create_lnk_perms;
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allow system_mail_t mail_spool_t:fifo_file rw_file_perms;
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allow system_mail_t etc_mail_t:file r_file_perms;
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', ` dnl if not targeted policy:
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optional_policy(`sendmail.te', `
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# sendmail has an ugly design, the one process parses input from the user and
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# then does system things with it.
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domain_auto_trans(initrc_t, sendmail_exec_t, sendmail_t)
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')
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# allow the sysadmin to do "mail someone < /home/user/whatever"
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allow sysadm_mail_t user_home_dir_type:dir search;
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r_dir_file(sysadm_mail_t, user_home_type)
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') dnl end ifdef targeted_policy
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# for a mail server process that does things in response to a user command
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allow mta_user_agent userdomain:process sigchld;
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allow mta_user_agent { userdomain privfd }:fd use;
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ifdef(`crond.te', `
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allow mta_user_agent crond_t:process sigchld;
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')
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allow mta_user_agent sysadm_t:fifo_file { read write };
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allow { system_mail_t mta_user_agent } privmail:fd use;
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allow { system_mail_t mta_user_agent } privmail:process sigchld;
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allow { system_mail_t mta_user_agent } privmail:fifo_file { read write };
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allow { system_mail_t mta_user_agent } admin_tty_type:chr_file { read write };
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ifdef(`arpwatch.te', `
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# why is mail delivered to a directory of type arpwatch_data_t?
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allow mta_delivery_agent arpwatch_data_t:dir search;
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allow { system_mail_t mta_user_agent } arpwatch_tmp_t:file rw_file_perms;
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ifdef(`hide_broken_symptoms', `
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dontaudit { system_mail_t mta_user_agent } arpwatch_t:packet_socket { read write };
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')
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')dnl end if arpwatch.te
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allow mta_delivery_agent home_root_t:dir { getattr search };
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# for /var/spool/mail
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ra_dir_create_file(mta_delivery_agent, mail_spool_t)
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# for piping mail to a command
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can_exec(mta_delivery_agent, shell_exec_t)
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allow mta_delivery_agent bin_t:dir search;
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allow mta_delivery_agent bin_t:lnk_file read;
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allow mta_delivery_agent { etc_runtime_t proc_t }:file r_file_perms;
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# Transition from a system domain to the derived domain.
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domain_auto_trans(privmail, sendmail_exec_t, system_mail_t)
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allow privmail sendmail_exec_t:lnk_file r_file_perms;
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ifdef(`crond.te', `
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# Read cron temporary files.
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allow system_mail_t system_crond_tmp_t:file r_file_perms;
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allow mta_user_agent system_crond_tmp_t:file r_file_perms;
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')
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') dnl end TODO
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