367 lines
10 KiB
Plaintext
367 lines
10 KiB
Plaintext
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policy_module(cron, 1.0)
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########################################
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#
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# Declarations
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#
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type anacron_exec_t;
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files_type(anacron_exec_t)
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type cron_spool_t;
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files_type(cron_spool_t)
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type crond_t; #, privmail, nscd_client_domain
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type crond_exec_t;
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init_daemon_domain(crond_t,crond_exec_t)
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domain_wide_inherit_fd(crond_t)
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type crond_log_t;
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logging_log_file(crond_log_t)
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type crond_tmp_t;
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files_tmp_file(crond_tmp_t)
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type crond_var_run_t;
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files_pid_file(crond_var_run_t)
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type crontab_exec_t;
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files_type(crontab_exec_t)
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type system_cron_spool_t;
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type system_crond_t; #, privmail, nscd_client_domain;
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init_daemon_domain(system_crond_t,anacron_exec_t)
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corecmd_shell_entry_type(system_crond_t)
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role system_r types system_crond_t;
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type system_crond_lock_t;
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files_lock_file(system_crond_lock_t)
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type system_crond_tmp_t;
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files_tmp_file(system_crond_tmp_t)
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########################################
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#
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# Cron Local policy
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#
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allow crond_t self:capability { dac_override setgid setuid net_bind_service sys_nice };
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dontaudit crond_t self:capability { sys_resource sys_tty_config };
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allow crond_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem dyntransition };
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allow crond_t self:process setexec;
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allow crond_t self:fd use;
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allow crond_t self:fifo_file rw_file_perms;
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allow crond_t self:unix_dgram_socket create_socket_perms;
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allow crond_t self:unix_stream_socket create_stream_socket_perms;
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allow crond_t self:unix_dgram_socket sendto;
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allow crond_t self:unix_stream_socket connectto;
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allow crond_t self:shm create_shm_perms;
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allow crond_t self:sem create_sem_perms;
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allow crond_t self:msgq create_msgq_perms;
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allow crond_t self:msg { send receive };
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allow crond_t crond_log_t:file create_file_perms;
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allow crond_t crond_var_run_t:file create_file_perms;
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files_create_pid(crond_t,crond_var_run_t)
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allow crond_t crond_tmp_t:dir create_dir_perms;
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allow crond_t crond_tmp_t:file create_file_perms;
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files_create_tmp_files(crond_t, crond_tmp_t, { file dir })
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allow crond_t cron_spool_t:dir r_dir_perms;
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allow crond_t cron_spool_t:file r_file_perms;
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allow crond_t system_cron_spool_t:dir r_dir_perms;
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allow crond_t system_cron_spool_t:file r_file_perms;
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kernel_read_kernel_sysctl(crond_t)
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dev_read_sysfs(crond_t)
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selinux_get_fs_mount(crond_t)
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selinux_validate_context(crond_t)
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selinux_compute_access_vector(crond_t)
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selinux_compute_create_context(crond_t)
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selinux_compute_relabel_context(crond_t)
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selinux_compute_user_contexts(crond_t)
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dev_read_urand(crond_t)
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fs_getattr_all_fs(crond_t)
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fs_search_auto_mountpoints(crond_t)
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term_dontaudit_use_console(crond_t)
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# need auth_chkpwd to check for locked accounts.
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auth_domtrans_chk_passwd(crond_t)
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corecmd_exec_shell(crond_t)
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corecmd_list_sbin(crond_t)
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domain_use_wide_inherit_fd(crond_t)
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files_read_etc_files(crond_t)
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files_read_generic_spools(crond_t)
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init_use_fd(crond_t)
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init_use_script_pty(crond_t)
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libs_use_ld_so(crond_t)
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libs_use_shared_libs(crond_t)
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logging_send_syslog_msg(crond_t)
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seutil_read_config(crond_t)
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seutil_read_default_contexts(crond_t)
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seutil_sigchld_newrole(crond_t)
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miscfiles_read_localization(crond_t)
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userdom_use_unpriv_users_fd(crond_t)
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tunable_policy(`fcron_crond', `
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allow crond_t system_cron_spool_t:file create_file_perms;
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')
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ifdef(`targeted_policy', `
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term_dontaudit_use_unallocated_tty(crond_t)
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term_dontaudit_use_generic_pty(crond_t)
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files_dontaudit_read_root_file(crond_t)
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')
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optional_policy(`nis.te',`
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nis_use_ypbind(crond_t)
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')
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optional_policy(`crond.te',`
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# Commonly used from postinst scripts
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rpm_read_pipe(crond_t)
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')
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optional_policy(`udev.te', `
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udev_read_db(crond_t)
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')
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ifdef(`TODO',`
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# NB The constraints file has some entries for crond_t, this makes it
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# different from all other domains...
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dontaudit crond_t sysadm_home_dir_t:dir search;
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optional_policy(`rhgb.te', `
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rhgb_domain(crond_t)
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')
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# Read from /var/spool/cron.
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allow crond_t var_lib_t:dir search;
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allow crond_t mail_spool_t:dir search;
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# for if /var/mail is a symlink
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allow crond_t mail_spool_t:lnk_file read;
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allow crond_t default_t:dir search;
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# crond tries to search /root. Not sure why.
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allow crond_t sysadm_home_dir_t:dir r_dir_perms;
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# to search /home
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allow crond_t user_home_dir_type:dir r_dir_perms;
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ifdef(`distro_redhat', `
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# Run the rpm program in the rpm_t domain. Allow creation of RPM log files
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# via redirection of standard out.
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ifdef(`rpm.te', `
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allow crond_t rpm_log_t: file create_file_perms;
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system_crond_entry(rpm_exec_t, rpm_t)
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allow system_crond_t rpm_log_t:file create_file_perms;
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')
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')
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') dnl endif TODO
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########################################
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#
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# System cron process domain
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#
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allow system_crond_t self:capability { dac_override dac_read_search chown setgid setuid fowner net_bind_service fsetid };
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allow system_crond_t self:process { signal_perms setsched };
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allow system_crond_t self:fifo_file rw_file_perms;
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allow system_crond_t self:passwd rootok;
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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 system_crond_t system_cron_spool_t:file entrypoint;
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allow system_crond_t system_cron_spool_t:file r_file_perms;
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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 system_crond_t:process transition;
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dontaudit crond_t system_crond_t:process { noatsecure siginh rlimitinh };
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allow crond_t system_crond_t:fd use;
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allow system_crond_t crond_t:fd use;
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allow system_crond_t crond_t:fifo_file rw_file_perms;
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allow system_crond_t crond_t:process sigchld;
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# Write /var/lock/makewhatis.lock.
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allow system_crond_t system_crond_lock_t:file create_file_perms;
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files_create_lock(system_crond_t,system_crond_lock_t)
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# write temporary files
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allow system_crond_t system_crond_tmp_t:file create_file_perms;
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files_create_tmp_files(system_crond_t,system_crond_tmp_t)
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# write temporary files in crond tmp dir:
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allow system_crond_t crond_tmp_t:dir rw_dir_perms;
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type_transition system_crond_t crond_tmp_t:file system_crond_tmp_t;
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# Read from /var/spool/cron.
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allow system_crond_t cron_spool_t:dir r_dir_perms;
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allow system_crond_t cron_spool_t:file r_file_perms;
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# Access crond log files
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allow system_crond_t crond_log_t:file create_file_perms;
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logging_create_log(system_crond_t,crond_log_t)
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kernel_read_kernel_sysctl(system_crond_t)
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kernel_read_system_state(system_crond_t)
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kernel_read_software_raid_state(system_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(system_crond_t)
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corenet_tcp_sendrecv_all_if(system_crond_t)
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corenet_raw_sendrecv_all_if(system_crond_t)
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corenet_udp_sendrecv_all_if(system_crond_t)
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corenet_tcp_sendrecv_all_nodes(system_crond_t)
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corenet_raw_sendrecv_all_nodes(system_crond_t)
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corenet_udp_sendrecv_all_nodes(system_crond_t)
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corenet_tcp_sendrecv_all_ports(system_crond_t)
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corenet_udp_sendrecv_all_ports(system_crond_t)
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corenet_tcp_bind_all_nodes(system_crond_t)
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corenet_udp_bind_all_nodes(system_crond_t)
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dev_getattr_all_blk_files(system_crond_t)
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dev_getattr_all_chr_files(system_crond_t)
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dev_read_urand(system_crond_t)
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fs_getattr_all_fs(system_crond_t)
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fs_getattr_all_files(system_crond_t)
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corecmd_exec_bin(system_crond_t)
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corecmd_exec_sbin(system_crond_t)
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domain_exec_all_entry_files(system_crond_t)
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files_exec_etc_files(system_crond_t)
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files_read_etc_files(system_crond_t)
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files_read_etc_runtime_files(system_crond_t)
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files_list_all_dirs(system_crond_t)
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files_getattr_all_files(system_crond_t)
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files_read_usr_files(system_crond_t)
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files_read_var_files(system_crond_t)
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# for nscd:
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files_dontaudit_search_pids(system_crond_t)
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# Access other spool directories like
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# /var/spool/anacron and /var/spool/slrnpull.
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files_manage_generic_spools(system_crond_t)
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init_use_fd(system_crond_t)
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init_use_script_fd(system_crond_t)
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init_use_script_pty(system_crond_t)
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init_read_script_pid(system_crond_t)
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init_dontaudit_rw_script_pid(system_crond_t)
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# prelink tells init to restart it self, we either need to allow or dontaudit
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init_write_initctl(system_crond_t)
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libs_use_ld_so(system_crond_t)
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libs_use_shared_libs(system_crond_t)
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libs_exec_lib_files(system_crond_t)
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libs_exec_ld_so(system_crond_t)
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logging_read_generic_logs(system_crond_t)
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logging_send_syslog_msg(system_crond_t)
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miscfiles_read_localization(system_crond_t)
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miscfiles_read_man_pages(system_crond_t)
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miscfiles_rw_man_cache(system_crond_t)
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seutil_read_config(system_crond_t)
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tunable_policy(`cron_can_relabel',`
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seutil_domtrans_setfiles(system_crond_t)
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',`
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selinux_get_fs_mount(system_crond_t)
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selinux_validate_context(system_crond_t)
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selinux_compute_access_vector(system_crond_t)
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selinux_compute_create_context(system_crond_t)
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selinux_compute_relabel_context(system_crond_t)
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selinux_compute_user_contexts(system_crond_t)
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seutil_read_file_contexts(system_crond_t)
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')
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optional_policy(`nis.te',`
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nis_use_ypbind(system_crond_t)
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')
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ifdef(`TODO',`
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dontaudit userdomain system_crond_t:fd use;
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# quiet other ps operations
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dontaudit system_crond_t domain:dir { getattr search };
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# Do not audit attempts to search unlabeled directories (e.g. slocate).
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dontaudit system_crond_t unlabeled_t:dir r_dir_perms;
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dontaudit system_crond_t unlabeled_t:file r_file_perms;
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allow system_crond_t { sysfs_t rpc_pipefs_t }:dir getattr;
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# Write to /var/lib/slocate.db.
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allow system_crond_t var_lib_t:dir rw_dir_perms;
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allow system_crond_t var_lib_t:file create_file_perms;
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# for if /var/mail is a symlink
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allow system_crond_t mail_spool_t:lnk_file read;
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#
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# These rules are here to allow system cron jobs to su
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#
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ifdef(`su.te', `
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su_restricted_domain(system_crond,system)
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role system_r types system_crond_su_t;
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allow system_crond_su_t crond_t:fifo_file ioctl;
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')
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#
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# Required for webalizer
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#
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ifdef(`apache.te', `
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allow system_crond_t httpd_log_t:file r_file_perms;
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')
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ifdef(`distro_redhat', `
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optional_policy(`rpm.te', `
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allow system_crond_t rpm_log_t:file create_file_perms;
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')
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')
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ifdef(`mta.te', `
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mta_send_mail_transition(system_crond_t)
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# system_mail_t should only be reading from the cron fifo not needing to write
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dontaudit system_mail_t crond_t:fifo_file write;
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allow mta_user_agent system_crond_t:fd use;
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r_dir_file(system_mail_t, crond_tmp_t)
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')
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# for daemon re-start
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allow system_crond_t syslogd_t:lnk_file read;
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') dnl end TODO
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