254 lines
8.1 KiB
Plaintext
254 lines
8.1 KiB
Plaintext
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########################################
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#
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# cron_per_userdomain_template(domainprefix)
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#
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define(`cron_per_userdomain_template',`
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# Type of user crontabs once moved to cron spool.
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type $1_cron_spool_t;
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files_make_file($1_cron_spool_t)
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type $1_crond_t; # user_crond_domain;
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domain_make_domain($1_crond_t);
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corecommands_make_shell_entrypoint($1_crond_t)
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role $1_r types $1_crond_t;
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type $1_crontab_t;
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domain_make_domain($1_crontab_t)
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domain_make_entrypoint_file($1_crontab_t,crontab_exec_t)
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role $1_r types $1_crontab_t;
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##############################
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#
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# $1_crond_t local policy
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#
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allow $1_crond_t self:capability dac_override;
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allow $1_crond_t self:process { sigkill sigstop signull signal setsched };
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allow $1_crond_t self:fifo_file { read getattr write append };
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allow $1_crond_t self:unix_stream_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown listen accept };
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allow $1_crond_t self:unix_dgram_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };
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# The entrypoint interface is not used as this is not
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# a regular entrypoint. Since crontab files are
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# not directly executed, crond must ensure that
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# the crontab file has a type that is appropriate
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# for the domain of the user cron job. It
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# performs an entrypoint permission check
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# for this purpose.
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allow $1_crond_t $1_cron_spool_t:file entrypoint;
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# Permit a transition from the crond_t domain to this domain.
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# The transition is requested explicitly by the modified crond
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# via setexeccon. There is no way to set up an automatic
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# transition, since crontabs are configuration files, not executables.
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allow crond_t $1_crond_t:process transition;
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dontaudit crond_t $1_crond_t:process { noatsecure siginh rlimitinh };
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allow crond_t $1_crond_t:fd use;
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allow $1_crond_t crond_t:fd use;
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allow $1_crond_t crond_t:fifo_file rw_file_perms;
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allow $1_crond_t crond_t:process sigchld;
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kernel_read_system_state($1_crond_t)
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kernel_read_kernel_sysctl($1_crond_t)
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# ps does not need to access /boot when run from cron
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bootloader_ignore_search_bootloader_data_directory($1_crond_t)
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corenetwork_sendrecv_tcp_on_all_interfaces($1_crond_t)
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corenetwork_sendrecv_raw_on_all_interfaces($1_crond_t)
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corenetwork_sendrecv_udp_on_all_interfaces($1_crond_t)
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corenetwork_sendrecv_tcp_on_all_nodes($1_crond_t)
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corenetwork_sendrecv_raw_on_all_nodes($1_crond_t)
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corenetwork_sendrecv_udp_on_all_nodes($1_crond_t)
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corenetwork_sendrecv_tcp_on_all_ports($1_crond_t)
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corenetwork_sendrecv_udp_on_all_ports($1_crond_t)
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corenetwork_bind_tcp_on_all_nodes($1_crond_t)
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corenetwork_bind_udp_on_all_nodes($1_crond_t)
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devices_get_pseudorandom_data($1_crond_t)
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filesystem_get_all_filesystems_attributes($1_crond_t)
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domain_execute_all_entrypoint_programs($1_crond_t)
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files_read_general_application_resources($1_crond_t)
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files_execute_system_config_script($1_crond_t)
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# for nscd:
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files_ignore_search_runtime_data_directory($1_crond_t)
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corecommands_execute_general_programs($1_crond_t)
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corecommands_execute_system_programs($1_crond_t)
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libraries_use_dynamic_loader($1_crond_t)
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libraries_use_shared_libraries($1_crond_t)
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libraries_execute_library_scripts($1_crond_t)
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libraries_execute_dynamic_loader($1_crond_t)
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files_read_runtime_system_config($1_crond_t)
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logging_search_system_log_directory($1_crond_t)
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selinux_read_config($1_crond_t)
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miscfiles_read_localization($1_crond_t)
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tunable_policy(`fcron_crond', `
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allow crond_t $1_cron_spool_t:file { create ioctl read getattr lock write setattr append link unlink rename };
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')
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ifdef(`TODO',`
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# Access user files and dirs.
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allow $1_crond_t home_root_t:dir search;
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file_type_auto_trans($1_crond_t, $1_home_dir_t, $1_home_t)
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# Run scripts in user home directory and access shared libs.
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can_exec($1_crond_t, $1_home_t)
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file_type_auto_trans($1_crond_t, tmp_t, $1_tmp_t)
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ifdef(`mta.te', `
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domain_auto_trans($1_crond_t, sendmail_exec_t, $1_mail_t)
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allow $1_crond_t sendmail_exec_t:lnk_file { getattr read };
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# $1_mail_t should only be reading from the cron fifo not needing to write
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dontaudit $1_mail_t crond_t:fifo_file write;
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allow mta_user_agent $1_crond_t:fd use;
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')
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# This domain is granted permissions common to most domains.
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can_ypbind($1_crond_t)
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allow $1_crond_t var_spool_t:dir search;
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allow $1_crond_t var_t:dir r_dir_perms;
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allow $1_crond_t var_t:file { getattr read ioctl };
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# quiet other ps operations
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dontaudit $1_crond_t domain:dir { getattr search };
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') dnl endif TODO
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##############################
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#
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# $1_crontab_t local policy
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#
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# for ^Z
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allow $1_t $1_crontab_t:process signal;
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# Allow crond to read those crontabs in cron spool.
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allow crond_t $1_cron_spool_t:file { getattr read };
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# dac_override is to create the file in the directory under /tmp
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allow $1_crontab_t self:capability { setuid setgid chown dac_override };
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allow $1_crontab_t self:process { sigkill sigstop signull signal };
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# create files in /var/spool/cron
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allow $1_crontab_t $1_cron_spool_t:file { create ioctl read getattr lock write setattr append link unlink rename };
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allow $1_crontab_t cron_spool_t:dir { getattr search read write add_name remove_name };
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type_transition $1_crontab_t $1_cron_spool_t:file system_crond_tmp_t;
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# crontab signals crond by updating the mtime on the spooldir
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allow $1_crontab_t cron_spool_t:dir setattr;
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allow $1_crontab_t crond_log_t:file { getattr read append };
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filesystem_get_persistent_filesystem_attributes($1_crontab_t)
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domain_use_widely_inheritable_file_descriptors($1_crontab_t)
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files_read_general_system_config($1_crontab_t)
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libraries_use_dynamic_loader($1_crontab_t)
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libraries_use_shared_libraries($1_crontab_t)
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logging_send_system_log_message($1_crontab_t)
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miscfiles_read_localization($1_crontab_t)
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ifdef(`TODO',`
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# Transition from the user domain to the derived domain.
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domain_auto_trans($1_t, crontab_exec_t, $1_crontab_t)
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can_ps($1_t, $1_crontab_t)
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dontaudit $1_crontab_t proc_t:dir search;
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dontaudit $1_crontab_t selinux_config_t:dir search;
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# for the checks used by crontab -u
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dontaudit $1_crontab_t security_t:dir search;
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# Type for temporary files.
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file_type_auto_trans($1_crontab_t, tmp_t, $1_tmp_t, { dir file })
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# Use the type when creating files in /var/spool/cron.
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allow sysadm_crontab_t $1_cron_spool_t:file { getattr read };
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tunable_policy(`fcron_crond', `
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# fcron wants an instant update of a crontab change for the administrator
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# also crontab does a security check for crontab -u
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ifelse(`$1', `sysadm', `
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allow $1_crontab_t self:process setfscreate;
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kernel_get_selinuxfs_mount_point($1_crontab_t)
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', `
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dontaudit $1_crontab_t crond_t:process signal;
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')dnl end ifelse
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')dnl end ifdef fcron
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# Run helper programs as $1_t
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allow $1_crontab_t { bin_t sbin_t }:dir search;
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allow $1_crontab_t bin_t:lnk_file read;
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domain_auto_trans($1_crontab_t, { bin_t sbin_t shell_exec_t }, $1_t)
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# Read user crontabs
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allow $1_crontab_t { $1_home_t $1_home_dir_t }:dir r_dir_perms;
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allow $1_crontab_t $1_home_t:file r_file_perms;
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dontaudit $1_crontab_t $1_home_dir_t:dir write;
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# Access terminals.
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allow $1_crontab_t devpts_t:dir { read search getattr };
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allow $1_crontab_t $1_tty_device_t:chr_file { read write getattr ioctl };
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allow $1_crontab_t $1_devpts_t:chr_file { read write getattr ioctl };
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# Inherit and use descriptors from gnome-pty-helper.
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ifdef(`gnome-pty-helper.te', `allow $1_crontab_t $1_gph_t:fd use;')
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dontaudit $1_crontab_t var_run_t:dir search;
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') dnl endif TODO
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')
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########################################
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#
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# cron_admin_template(domainprefix)
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#
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define(`cron_admin_template',`
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logging_read_system_logs($1_crond_t)
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# Allow our crontab domain to unlink a user cron spool file.
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#allow $1_crontab_t user_cron_spool_t:file unlink;
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# Manipulate other users crontab.
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kernel_get_selinuxfs_mount_point($1_crontab_t)
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kernel_validate_selinux_context($1_crontab_t)
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kernel_compute_selinux_access_vector($1_crontab_t)
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kernel_compute_selinux_create_context($1_crontab_t)
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kernel_compute_selinux_relabel_context($1_crontab_t)
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kernel_compute_selinux_reachable_user_contexts($1_crontab_t)
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')
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########################################
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#
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# cron_modify_log(domain)
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#
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define(`cron_modify_log',`
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requires_block_template(`$0'_depend)
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allow $1 crond_log_t:file { getattr read write ioctl lock append };
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')
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define(`cron_modify_log_depend',`
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type crond_log_t;
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class file rw_file_perms;
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')
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