246 lines
6.0 KiB
Plaintext
246 lines
6.0 KiB
Plaintext
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#
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# Define the constraints
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#
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# constrain class_set perm_set expression ;
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#
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# expression : ( expression )
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# | not expression
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# | expression and expression
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# | expression or expression
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# | u1 op u2
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# | r1 role_op r2
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# | t1 op t2
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# | u1 op names
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# | u2 op names
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# | r1 op names
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# | r2 op names
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# | t1 op names
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# | t2 op names
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#
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# op : == | !=
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# role_op : == | != | eq | dom | domby | incomp
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#
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# names : name | { name_list }
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# name_list : name | name_list name
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#
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define(`basic_ubac_conditions',`
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ifdef(`enable_ubac',`
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u1 == u2
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or u1 == system_u
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or u2 == system_u
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or t1 != ubac_constrained_type
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or t2 != ubac_constrained_type
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')
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')
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define(`basic_ubac_constraint',`
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ifdef(`enable_ubac',`
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constrain $1 all_$1_perms
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(
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basic_ubac_conditions
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);
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')
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')
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define(`exempted_ubac_constraint',`
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ifdef(`enable_ubac',`
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constrain $1 all_$1_perms
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(
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basic_ubac_conditions
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or t1 == $2
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);
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')
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')
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########################################
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#
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# File rules
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#
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exempted_ubac_constraint(dir, ubacfile)
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exempted_ubac_constraint(file, ubacfile)
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exempted_ubac_constraint(lnk_file, ubacfile)
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exempted_ubac_constraint(fifo_file, ubacfile)
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exempted_ubac_constraint(sock_file, ubacfile)
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exempted_ubac_constraint(chr_file, ubacfile)
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exempted_ubac_constraint(blk_file, ubacfile)
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# SElinux object identity change constraint:
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constrain dir_file_class_set { create relabelto relabelfrom }
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(
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u1 == u2
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or t1 == can_change_object_identity
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);
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########################################
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#
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# Process rules
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#
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ifdef(`enable_ubac',`
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constrain process { sigchld sigkill sigstop signull signal ptrace getsched setsched getsession getpgid setpgid getcap setcap share getattr setrlimit }
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(
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basic_ubac_conditions
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or t1 == ubacproc
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);
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')
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constrain process { transition noatsecure siginh rlimitinh }
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(
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u1 == u2
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or ( t1 == can_change_process_identity and t2 == process_user_target )
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or ( t1 == cron_source_domain and ( t2 == cron_job_domain or u2 == system_u ) )
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or ( t1 == can_system_change and u2 == system_u )
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or ( t1 == process_uncond_exempt )
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);
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constrain process { transition noatsecure siginh rlimitinh }
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(
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r1 == r2
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or ( t1 == can_change_process_identity and t2 == process_user_target )
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or ( t1 == cron_source_domain and ( t2 == cron_job_domain or u2 == system_u ) )
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or ( t1 == can_system_change and u2 == system_u )
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or ( t1 == process_uncond_exempt )
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);
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constrain process dyntransition
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(
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u1 == u2 and r1 == r2
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);
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# These permissions do not have ubac constraints:
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# fork
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# setexec
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# setfscreate
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# setcurrent
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# execmem
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# execstack
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# execheap
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# setkeycreate
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# setsockcreate
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########################################
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#
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# File descriptor rules
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#
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exempted_ubac_constraint(fd, ubacfd)
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########################################
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#
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# Socket rules
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#
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exempted_ubac_constraint(socket, ubacsock)
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exempted_ubac_constraint(tcp_socket, ubacsock)
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exempted_ubac_constraint(udp_socket, ubacsock)
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exempted_ubac_constraint(rawip_socket, ubacsock)
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exempted_ubac_constraint(netlink_socket, ubacsock)
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exempted_ubac_constraint(packet_socket, ubacsock)
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exempted_ubac_constraint(key_socket, ubacsock)
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exempted_ubac_constraint(unix_stream_socket, ubacsock)
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exempted_ubac_constraint(unix_dgram_socket, ubacsock)
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exempted_ubac_constraint(netlink_route_socket, ubacsock)
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exempted_ubac_constraint(netlink_firewall_socket, ubacsock)
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exempted_ubac_constraint(netlink_tcpdiag_socket, ubacsock)
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exempted_ubac_constraint(netlink_nflog_socket, ubacsock)
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exempted_ubac_constraint(netlink_xfrm_socket, ubacsock)
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exempted_ubac_constraint(netlink_selinux_socket, ubacsock)
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exempted_ubac_constraint(netlink_audit_socket, ubacsock)
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exempted_ubac_constraint(netlink_ip6fw_socket, ubacsock)
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exempted_ubac_constraint(netlink_dnrt_socket, ubacsock)
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exempted_ubac_constraint(netlink_kobject_uevent_socket, ubacsock)
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exempted_ubac_constraint(appletalk_socket, ubacsock)
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exempted_ubac_constraint(dccp_socket, ubacsock)
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constrain socket_class_set { create relabelto relabelfrom }
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(
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u1 == u2
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or t1 == can_change_object_identity
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);
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########################################
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#
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# SysV IPC rules
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exempted_ubac_constraint(sem, ubacipc)
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exempted_ubac_constraint(msg, ubacipc)
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exempted_ubac_constraint(msgq, ubacipc)
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exempted_ubac_constraint(shm, ubacipc)
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exempted_ubac_constraint(ipc, ubacipc)
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########################################
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#
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# SE-X Windows rules
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#
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exempted_ubac_constraint(x_drawable, ubacxwin)
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exempted_ubac_constraint(x_screen, ubacxwin)
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exempted_ubac_constraint(x_gc, ubacxwin)
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exempted_ubac_constraint(x_font, ubacxwin)
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exempted_ubac_constraint(x_colormap, ubacxwin)
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exempted_ubac_constraint(x_property, ubacxwin)
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exempted_ubac_constraint(x_selection, ubacxwin)
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exempted_ubac_constraint(x_cursor, ubacxwin)
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exempted_ubac_constraint(x_client, ubacxwin)
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exempted_ubac_constraint(x_device, ubacxwin)
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exempted_ubac_constraint(x_server, ubacxwin)
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exempted_ubac_constraint(x_extension, ubacxwin)
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exempted_ubac_constraint(x_resource, ubacxwin)
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exempted_ubac_constraint(x_event, ubacxwin)
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exempted_ubac_constraint(x_synthetic_event, ubacxwin)
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exempted_ubac_constraint(x_application_data, ubacxwin)
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########################################
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#
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# D-BUS rules
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#
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exempted_ubac_constraint(dbus, ubacdbus)
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########################################
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#
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# Key rules
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#
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exempted_ubac_constraint(key, ubackey)
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########################################
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#
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# Database rules
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#
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exempted_ubac_constraint(db_database, ubacdb)
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exempted_ubac_constraint(db_table, ubacdb)
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exempted_ubac_constraint(db_procedure, ubacdb)
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exempted_ubac_constraint(db_column, ubacdb)
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exempted_ubac_constraint(db_tuple, ubacdb)
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exempted_ubac_constraint(db_blob, ubacdb)
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basic_ubac_constraint(association)
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basic_ubac_constraint(peer)
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# these classes have no UBAC restrictions
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#class security
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#class system
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#class capability
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#class memprotect
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#class passwd # userspace
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#class node
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#class netif
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#class packet
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#class capability2
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#class nscd # userspace
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#class context # userspace
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undefine(`basic_ubac_constraint')
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undefine(`basic_ubac_conditions')
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undefine(`exempted_ubac_constraint')
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