100 lines
3.1 KiB
Plaintext
100 lines
3.1 KiB
Plaintext
#
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# Macros for crontab domains.
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#
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#
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# Authors: Jonathan Crowley (MITRE) <jonathan@mitre.org>
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# Revised by Stephen Smalley <sds@epoch.ncsc.mil>
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#
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#
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# crontab_domain(domain_prefix)
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#
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# Define a derived domain for the crontab program when executed by
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# a user domain.
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#
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# The type declaration for the executable type for this program is
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# provided separately in domains/program/crontab.te.
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#
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undefine(`crontab_domain')
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define(`crontab_domain',`
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# Derived domain based on the calling user domain and the program.
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type $1_crontab_t, domain, privlog;
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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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# for ^Z
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allow $1_t $1_crontab_t:process signal;
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# The user role is authorized for this domain.
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role $1_r types $1_crontab_t;
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uses_shlib($1_crontab_t)
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allow $1_crontab_t etc_t:file { getattr read };
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allow $1_crontab_t self:unix_stream_socket create_socket_perms;
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allow $1_crontab_t self:unix_dgram_socket create_socket_perms;
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read_locale($1_crontab_t)
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# Use capabilities dac_override is to create the file in the directory
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# under /tmp
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allow $1_crontab_t $1_crontab_t:capability { setuid setgid chown dac_override };
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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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# 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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allow $1_crontab_t { var_t var_spool_t }:dir { getattr search };
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file_type_auto_trans($1_crontab_t, cron_spool_t, $1_cron_spool_t, file)
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allow $1_crontab_t self:process { fork signal_perms };
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ifdef(`fcron.te', `
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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 crond_t:process signal;
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can_setfscreate($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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# for the checks used by crontab -u
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dontaudit $1_crontab_t security_t:dir search;
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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 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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# 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 the cron log file.
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allow $1_crontab_t crond_log_t:file r_file_perms;
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allow $1_crontab_t crond_log_t:file append;
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# Access terminals.
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allow $1_crontab_t device_t:dir search;
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access_terminal($1_crontab_t, $1);
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allow $1_crontab_t fs_t:filesystem getattr;
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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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allow $1_crontab_t privfd:fd use;
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dontaudit $1_crontab_t var_run_t:dir search;
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')
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