252 lines
6.4 KiB
Plaintext
252 lines
6.4 KiB
Plaintext
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#
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# DCC - Distributed Checksum Clearinghouse
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# Author: David Hampton <hampton@employees.org>
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#
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#
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# NOTE: DCC has writeable files in /etc/dcc that should probably be in
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# /var/lib/dcc. For now this policy supports both directories being
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# writable.
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# Files common to all dcc programs
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type dcc_client_map_t, file_type, sysadmfile;
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type dcc_var_t, file_type, sysadmfile;
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type dcc_var_run_t, file_type, sysadmfile;
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##########
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##########
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#
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# common to all dcc variants
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#
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define(`dcc_common',`
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# Access files in /var/dcc. The map file can be updated
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r_dir_file($1_t, dcc_var_t)
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allow $1_t dcc_client_map_t:file rw_file_perms;
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# Read mtab, nsswitch and locale
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allow $1_t { etc_t etc_runtime_t }:file { getattr read };
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read_locale($1_t)
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#Networking
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can_resolve($1_t)
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ifelse($2, `server', `
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can_network_udp($1_t)
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', `
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can_network_udp($1_t, `dcc_port_t')
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')
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allow $1_t self:unix_dgram_socket create_socket_perms;
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# Create private temp files
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tmp_domain($1)
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# Triggered by a call to gethostid(2) in dcc client libs
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allow $1_t self:unix_stream_socket { connect create };
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allow $1_t sysadm_su_t:process { sigchld };
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allow $1_t dcc_script_t:fd use;
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dontaudit $1_t kernel_t:fd use;
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dontaudit $1_t root_t:file read;
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')
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allow initrc_t dcc_var_run_t:dir rw_dir_perms;
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##########
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##########
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#
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# dccd - Server daemon that can be accessed over the net
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#
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daemon_domain(dccd, `, privlog, nscd_client_domain')
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dcc_common(dccd, server);
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# Runs the dbclean program
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allow dccd_t bin_t:dir search;
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domain_auto_trans(dccd_t, dcc_dbclean_exec_t, dcc_dbclean_t)
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# The daemon needs to listen on the dcc ports
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allow dccd_t dcc_port_t:udp_socket name_bind;
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# Updating dcc_db, flod, ...
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create_dir_file(dccd_t, dcc_var_t);
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allow dccd_t self:capability net_admin;
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allow dccd_t self:netlink_route_socket { bind create getattr nlmsg_read read write };
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# Reading /proc/meminfo
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allow dccd_t proc_t:file { getattr read };
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#
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# cdcc - control dcc daemon
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#
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application_domain(cdcc, `, nscd_client_domain')
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role system_r types cdcc_t;
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dcc_common(cdcc)
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# suid program
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allow cdcc_t self:capability setuid;
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# Running from the command line
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allow cdcc_t sshd_t:fd use;
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allow cdcc_t sysadm_devpts_t:chr_file rw_file_perms;
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##########
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##########
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#
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# DCC Clients
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#
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#
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# dccifd - Spamassassin and general MTA persistent client
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#
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daemon_domain(dccifd, `, privlog, nscd_client_domain')
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dcc_common(dccifd);
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file_type_auto_trans(dccifd_t, dcc_var_run_t, dccifd_var_run_t, file)
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# Allow the domain to communicate with other processes
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allow dccifd_t self:unix_stream_socket create_stream_socket_perms;
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# Updating dcc_db, flod, ...
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create_dir_notdevfile(dccifd_t, dcc_var_t);
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# Updating map, ...
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allow dccifd_t dcc_client_map_t:file rw_file_perms;
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# dccifd communications socket
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type dccifd_sock_t, file_type, sysadmfile;
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file_type_auto_trans(dccifd_t, dcc_var_t, dccifd_sock_t, sock_file)
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# Reading /proc/meminfo
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allow dccifd_t proc_t:file { getattr read };
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#
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# dccm - sendmail milter client
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#
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daemon_domain(dccm, `, privlog, nscd_client_domain')
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dcc_common(dccm);
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file_type_auto_trans(dccm_t, dcc_var_run_t, dccm_var_run_t, file)
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# Allow the domain to communicate with other processes
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allow dccm_t self:unix_stream_socket create_stream_socket_perms;
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# Updating map, ...
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create_dir_notdevfile(dccm_t, dcc_var_t);
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allow dccm_t dcc_client_map_t:file rw_file_perms;
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# dccm communications socket
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type dccm_sock_t, file_type, sysadmfile;
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file_type_auto_trans(dccm_t, dcc_var_run_t, dccm_sock_t, sock_file)
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#
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# dccproc - dcc procmail interface
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#
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application_domain(dcc_client, `, privlog, nscd_client_domain')
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role system_r types dcc_client_t;
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dcc_common(dcc_client)
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# suid program
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allow dcc_client_t self:capability setuid;
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# Running from the command line
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allow dcc_client_t sshd_t:fd use;
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allow dcc_client_t sysadm_devpts_t:chr_file rw_file_perms;
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##########
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##########
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#
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# DCC Utilities
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#
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#
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# dbclean - database cleanup tool
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#
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application_domain(dcc_dbclean, `, nscd_client_domain')
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role system_r types dcc_dbclean_t;
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dcc_common(dcc_dbclean)
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# Updating various files.
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create_dir_file(dcc_dbclean_t, dcc_var_t);
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# wants to look at /proc/meminfo
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allow dcc_dbclean_t proc_t:dir search;
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allow dcc_dbclean_t proc_t:file { getattr read };
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# Running from the command line
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allow dcc_dbclean_t sshd_t:fd use;
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allow dcc_dbclean_t sysadm_devpts_t:chr_file rw_file_perms;
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##########
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##########
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#
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# DCC Startup scripts
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#
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# These are shell sccripts that start/stop/restart the various dcc
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# programs.
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#
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init_service_domain(dcc_script, `, nscd_client_domain')
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general_domain_access(dcc_script_t)
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general_proc_read_access(dcc_script_t)
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can_exec_any(dcc_script_t)
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dcc_common(dcc_script)
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# Allow calling the script from an init script (initrt_t)
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domain_auto_trans(initrc_t, dcc_script_exec_t, dcc_script_t)
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# Start up the daemon process. These scripts run 'su' to change to
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# the dcc user (even though the default dcc user is root).
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allow dcc_script_t self:capability setuid;
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su_restricted_domain(dcc_script, system)
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role system_r types dcc_script_su_t;
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domain_auto_trans(dcc_script_su_t, dccd_exec_t, dccd_t)
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domain_auto_trans(dcc_script_su_t, dccm_exec_t, dccm_t)
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domain_auto_trans(dcc_script_su_t, dccifd_exec_t, dccifd_t)
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# Stop the daemon process
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allow dcc_script_t { dccifd_t dccm_t }:process { sigkill signal };
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# Access various DCC files
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allow dcc_script_t { var_t var_run_t dcc_var_run_t}:dir { getattr search };
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allow dcc_script_t { dccifd_var_run_t dccm_var_run_t }:file { getattr read };
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allow { dcc_script_t dcc_script_su_t } initrc_t:fd use;
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allow { dcc_script_t dcc_script_su_t } devpts_t:dir search;
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allow { dcc_script_t dcc_script_su_t } initrc_devpts_t:chr_file rw_file_perms;
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allow dcc_script_t devtty_t:chr_file { read write };
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allow dcc_script_su_t sysadm_home_dir_t:dir search;
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allow dcc_script_su_t sysadm_t:process { noatsecure rlimitinh siginh transition };
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allow dcc_script_su_t initrc_devpts_t:chr_file { relabelfrom relabelto };
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dontaudit dcc_script_su_t kernel_t:fd use;
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dontaudit dcc_script_su_t root_t:file read;
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dontaudit dcc_script_t { home_root_t user_home_dir_t}:dir { getattr search };
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allow sysadm_t dcc_script_t:fd use;
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##########
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##########
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#
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# External spam checkers need to run and/or talk to DCC
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#
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define(`access_dcc',`
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domain_auto_trans($1_t, dcc_client_exec_t, dcc_client_t);
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allow $1_t dcc_var_t:dir search;
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allow $1_t dccifd_sock_t:sock_file { getattr write };
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allow $1_t dccifd_t:unix_stream_socket connectto;
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allow $1_t dcc_script_t:unix_stream_socket connectto;
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')
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ifdef(`amavis.te',`access_dcc(amavisd)')
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ifdef(`spamd.te',`access_dcc(spamd)')
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