256 lines
7.5 KiB
Plaintext
256 lines
7.5 KiB
Plaintext
## <summary>Periodic execution of scheduled commands.</summary>
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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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template(`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_file_type($1_cron_spool_t)
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type $1_crond_t; # user_crond_domain;
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domain_type($1_crond_t);
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corecmd_shell_entry_type($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_type($1_crontab_t)
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domain_entry_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 { signal_perms setsched };
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allow $1_crond_t self:fifo_file rw_file_perms;
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allow $1_crond_t self:unix_stream_socket create_stream_socket_perms;
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allow $1_crond_t self:unix_dgram_socket create_socket_perms;
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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_dontaudit_search_boot($1_crond_t)
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corenet_tcp_sendrecv_all_if($1_crond_t)
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corenet_raw_sendrecv_all_if($1_crond_t)
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corenet_udp_sendrecv_all_if($1_crond_t)
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corenet_tcp_sendrecv_all_nodes($1_crond_t)
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corenet_raw_sendrecv_all_nodes($1_crond_t)
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corenet_udp_sendrecv_all_nodes($1_crond_t)
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corenet_tcp_sendrecv_all_ports($1_crond_t)
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corenet_udp_sendrecv_all_ports($1_crond_t)
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corenet_tcp_bind_all_nodes($1_crond_t)
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corenet_udp_bind_all_nodes($1_crond_t)
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dev_read_urand($1_crond_t)
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fs_getattr_all_fs($1_crond_t)
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domain_exec_all_entry_files($1_crond_t)
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files_read_usr_files($1_crond_t)
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files_exec_generic_etc_files($1_crond_t)
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# for nscd:
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files_dontaudit_search_pids($1_crond_t)
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corecmd_exec_bin($1_crond_t)
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corecmd_exec_sbin($1_crond_t)
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libs_use_ld_so($1_crond_t)
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libs_use_shared_libs($1_crond_t)
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libs_exec_lib_files($1_crond_t)
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libs_exec_ld_so($1_crond_t)
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files_read_etc_runtime_files($1_crond_t)
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logging_search_logs($1_crond_t)
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seutil_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_file_perms;
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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 r_file_perms;
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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 r_file_perms;
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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 r_file_perms;
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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 signal_perms;
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# create files in /var/spool/cron
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allow $1_crontab_t $1_cron_spool_t:file create_file_perms;
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allow $1_crontab_t cron_spool_t:dir rw_dir_perms;
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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 ra_file_perms;
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fs_getattr_xattr_fs($1_crontab_t)
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domain_use_wide_inherit_fd($1_crontab_t)
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files_read_generic_etc_files($1_crontab_t)
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libs_use_ld_so($1_crontab_t)
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libs_use_shared_libs($1_crontab_t)
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logging_send_syslog_msg($1_crontab_t)
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miscfiles_read_localization($1_crontab_t)
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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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dontaudit $1_crontab_t crond_t:process signal;
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')
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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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# 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 r_dir_perms;
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allow $1_crontab_t $1_tty_device_t:chr_file rw_file_perms;
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allow $1_crontab_t $1_devpts_t:chr_file rw_file_perms;
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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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template(`cron_admin_template',`
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logging_read_generic_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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selinux_get_fs_mount($1_crontab_t)
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selinux_validate_context($1_crontab_t)
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selinux_compute_access_vector($1_crontab_t)
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selinux_compute_create_context($1_crontab_t)
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selinux_compute_relabel_context($1_crontab_t)
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selinux_compute_user_contexts($1_crontab_t)
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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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allow $1_crontab_t self:process setfscreate;
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selinux_get_fs_mount($1_crontab_t)
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')
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')
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########################################
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#
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# cron_rw_log(domain)
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#
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interface(`cron_rw_log',`
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gen_require(`
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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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logging_search_logs($1)
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allow $1 crond_log_t:file rw_file_perms;
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')
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