e0ea7b15ca
The attached patch fixes incorrect behavior in sepgsql_enable_users_ddl.
The current policy allows users/unprivs to run ALTER TABLE statement
unconditionally, because db_table/db_column:{setattr} is allowed outside
of the boolean. It should be moved to conditional section.
In addition, they are also allowed to db_procedure:{create drop setattr}
for xxxx_sepgsql_proc_exec_t, but it means we allows them to create, drop
or alter definition of the functions unconditionally. So, it also should
be moved to conditional section.
The postgresql.te allows sepgsql_client_type to modify sepgsql_table_t
and sepgsql_sysobj_t when sepgsql_enable_users_ddl is enabled, but
it should not be allowed.
KaiGai Kohei
366 lines
13 KiB
Plaintext
366 lines
13 KiB
Plaintext
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policy_module(postgresql, 1.8.6)
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gen_require(`
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class db_database all_db_database_perms;
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class db_table all_db_table_perms;
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class db_procedure all_db_procedure_perms;
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class db_column all_db_column_perms;
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class db_tuple all_db_tuple_perms;
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class db_blob all_db_blob_perms;
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')
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#################################
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#
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# Declarations
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#
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## <desc>
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## <p>
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## Allow unprived users to execute DDL statement
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## </p>
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## </desc>
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gen_tunable(sepgsql_enable_users_ddl, true)
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type postgresql_t;
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type postgresql_exec_t;
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init_daemon_domain(postgresql_t, postgresql_exec_t)
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type postgresql_db_t;
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files_type(postgresql_db_t)
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type postgresql_etc_t;
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files_config_file(postgresql_etc_t)
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type postgresql_lock_t;
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files_lock_file(postgresql_lock_t)
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type postgresql_log_t;
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logging_log_file(postgresql_log_t)
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type postgresql_tmp_t;
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files_tmp_file(postgresql_tmp_t)
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type postgresql_var_run_t;
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files_pid_file(postgresql_var_run_t)
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# database clients attribute
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attribute sepgsql_client_type;
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attribute sepgsql_unconfined_type;
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# database objects attribute
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attribute sepgsql_database_type;
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attribute sepgsql_table_type;
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attribute sepgsql_sysobj_table_type;
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attribute sepgsql_procedure_type;
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attribute sepgsql_blob_type;
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attribute sepgsql_module_type;
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# database object types
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type sepgsql_blob_t;
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postgresql_blob_object(sepgsql_blob_t)
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type sepgsql_db_t;
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postgresql_database_object(sepgsql_db_t)
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type sepgsql_fixed_table_t;
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postgresql_table_object(sepgsql_fixed_table_t)
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type sepgsql_proc_exec_t;
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typealias sepgsql_proc_exec_t alias sepgsql_proc_t;
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postgresql_procedure_object(sepgsql_proc_exec_t)
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type sepgsql_ro_blob_t;
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postgresql_blob_object(sepgsql_ro_blob_t)
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type sepgsql_ro_table_t;
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postgresql_table_object(sepgsql_ro_table_t)
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type sepgsql_secret_blob_t;
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postgresql_blob_object(sepgsql_secret_blob_t)
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type sepgsql_secret_table_t;
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postgresql_table_object(sepgsql_secret_table_t)
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type sepgsql_sysobj_t;
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postgresql_system_table_object(sepgsql_sysobj_t)
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type sepgsql_table_t;
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postgresql_table_object(sepgsql_table_t)
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type sepgsql_trusted_proc_exec_t;
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postgresql_procedure_object(sepgsql_trusted_proc_exec_t)
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# Trusted Procedure Domain
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type sepgsql_trusted_proc_t;
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domain_type(sepgsql_trusted_proc_t)
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postgresql_unconfined(sepgsql_trusted_proc_t)
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role system_r types sepgsql_trusted_proc_t;
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# Types for unprivileged client
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type unpriv_sepgsql_blob_t;
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postgresql_blob_object(unpriv_sepgsql_blob_t)
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type unpriv_sepgsql_proc_exec_t;
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postgresql_procedure_object(unpriv_sepgsql_proc_exec_t)
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type unpriv_sepgsql_sysobj_t;
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postgresql_system_table_object(unpriv_sepgsql_sysobj_t)
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type unpriv_sepgsql_table_t;
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postgresql_table_object(unpriv_sepgsql_table_t)
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# Types for UBAC
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type user_sepgsql_blob_t;
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typealias user_sepgsql_blob_t alias { staff_sepgsql_blob_t sysadm_sepgsql_blob_t };
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typealias user_sepgsql_blob_t alias { auditadm_sepgsql_blob_t secadm_sepgsql_blob_t };
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postgresql_blob_object(user_sepgsql_blob_t)
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type user_sepgsql_proc_exec_t;
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typealias user_sepgsql_proc_exec_t alias { staff_sepgsql_proc_exec_t sysadm_sepgsql_proc_exec_t };
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typealias user_sepgsql_proc_exec_t alias { auditadm_sepgsql_proc_exec_t secadm_sepgsql_proc_exec_t };
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postgresql_procedure_object(user_sepgsql_proc_exec_t)
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type user_sepgsql_sysobj_t;
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typealias user_sepgsql_sysobj_t alias { staff_sepgsql_sysobj_t sysadm_sepgsql_sysobj_t };
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typealias user_sepgsql_sysobj_t alias { auditadm_sepgsql_sysobj_t secadm_sepgsql_sysobj_t };
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postgresql_system_table_object(user_sepgsql_sysobj_t)
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type user_sepgsql_table_t;
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typealias user_sepgsql_table_t alias { staff_sepgsql_table_t sysadm_sepgsql_table_t };
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typealias user_sepgsql_table_t alias { auditadm_sepgsql_table_t secadm_sepgsql_table_t };
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postgresql_table_object(user_sepgsql_table_t)
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########################################
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#
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# postgresql Local policy
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#
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allow postgresql_t self:capability { kill dac_override dac_read_search chown fowner fsetid setuid setgid sys_nice sys_tty_config sys_admin };
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dontaudit postgresql_t self:capability { sys_tty_config sys_admin };
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allow postgresql_t self:process signal_perms;
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allow postgresql_t self:fifo_file rw_fifo_file_perms;
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allow postgresql_t self:sem create_sem_perms;
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allow postgresql_t self:shm create_shm_perms;
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allow postgresql_t self:tcp_socket create_stream_socket_perms;
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allow postgresql_t self:udp_socket create_stream_socket_perms;
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allow postgresql_t self:unix_dgram_socket create_socket_perms;
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allow postgresql_t self:unix_stream_socket create_stream_socket_perms;
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allow postgresql_t self:netlink_selinux_socket create_socket_perms;
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allow postgresql_t sepgsql_database_type:db_database *;
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type_transition postgresql_t postgresql_t:db_database sepgsql_db_t;
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allow postgresql_t sepgsql_module_type:db_database install_module;
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# Database/Loadable module
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allow sepgsql_database_type sepgsql_module_type:db_database load_module;
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allow postgresql_t sepgsql_table_type:{ db_table db_column db_tuple } *;
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type_transition postgresql_t sepgsql_database_type:db_table sepgsql_sysobj_t;
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allow postgresql_t sepgsql_procedure_type:db_procedure *;
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type_transition postgresql_t sepgsql_database_type:db_procedure sepgsql_proc_exec_t;
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allow postgresql_t sepgsql_blob_type:db_blob *;
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type_transition postgresql_t sepgsql_database_type:db_blob sepgsql_blob_t;
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manage_dirs_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
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manage_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
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manage_lnk_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
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manage_fifo_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
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manage_sock_files_pattern(postgresql_t, postgresql_db_t, postgresql_db_t)
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files_var_lib_filetrans(postgresql_t, postgresql_db_t, { dir file lnk_file sock_file fifo_file })
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allow postgresql_t postgresql_etc_t:dir list_dir_perms;
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read_files_pattern(postgresql_t, postgresql_etc_t, postgresql_etc_t)
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read_lnk_files_pattern(postgresql_t, postgresql_etc_t, postgresql_etc_t)
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allow postgresql_t postgresql_exec_t:lnk_file { getattr read };
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can_exec(postgresql_t, postgresql_exec_t )
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allow postgresql_t postgresql_lock_t:file manage_file_perms;
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files_lock_filetrans(postgresql_t,postgresql_lock_t,file)
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manage_files_pattern(postgresql_t, postgresql_log_t, postgresql_log_t)
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logging_log_filetrans(postgresql_t, postgresql_log_t, { file dir })
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manage_dirs_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
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manage_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
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manage_lnk_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
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manage_fifo_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
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manage_sock_files_pattern(postgresql_t, postgresql_tmp_t, postgresql_tmp_t)
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files_tmp_filetrans(postgresql_t, postgresql_tmp_t, { dir file sock_file })
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fs_tmpfs_filetrans(postgresql_t, postgresql_tmp_t, { dir file lnk_file sock_file fifo_file })
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manage_files_pattern(postgresql_t, postgresql_var_run_t, postgresql_var_run_t)
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manage_sock_files_pattern(postgresql_t, postgresql_var_run_t, postgresql_var_run_t)
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files_pid_filetrans(postgresql_t, postgresql_var_run_t, file)
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kernel_read_kernel_sysctls(postgresql_t)
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kernel_read_system_state(postgresql_t)
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kernel_list_proc(postgresql_t)
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kernel_read_all_sysctls(postgresql_t)
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kernel_read_proc_symlinks(postgresql_t)
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corenet_all_recvfrom_unlabeled(postgresql_t)
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corenet_all_recvfrom_netlabel(postgresql_t)
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corenet_tcp_sendrecv_generic_if(postgresql_t)
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corenet_udp_sendrecv_generic_if(postgresql_t)
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corenet_tcp_sendrecv_generic_node(postgresql_t)
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corenet_udp_sendrecv_generic_node(postgresql_t)
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corenet_tcp_sendrecv_all_ports(postgresql_t)
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corenet_udp_sendrecv_all_ports(postgresql_t)
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corenet_tcp_bind_generic_node(postgresql_t)
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corenet_tcp_bind_postgresql_port(postgresql_t)
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corenet_tcp_connect_auth_port(postgresql_t)
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corenet_sendrecv_postgresql_server_packets(postgresql_t)
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corenet_sendrecv_auth_client_packets(postgresql_t)
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dev_read_sysfs(postgresql_t)
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dev_read_urand(postgresql_t)
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fs_getattr_all_fs(postgresql_t)
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fs_search_auto_mountpoints(postgresql_t)
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fs_rw_hugetlbfs_files(postgresql_t)
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selinux_get_enforce_mode(postgresql_t)
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selinux_validate_context(postgresql_t)
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selinux_compute_access_vector(postgresql_t)
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selinux_compute_create_context(postgresql_t)
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selinux_compute_relabel_context(postgresql_t)
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term_use_controlling_term(postgresql_t)
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corecmd_exec_bin(postgresql_t)
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corecmd_exec_shell(postgresql_t)
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domain_dontaudit_list_all_domains_state(postgresql_t)
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domain_use_interactive_fds(postgresql_t)
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files_dontaudit_search_home(postgresql_t)
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files_manage_etc_files(postgresql_t)
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files_search_etc(postgresql_t)
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files_read_etc_runtime_files(postgresql_t)
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files_read_usr_files(postgresql_t)
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auth_use_nsswitch(postgresql_t)
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init_read_utmp(postgresql_t)
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logging_send_syslog_msg(postgresql_t)
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miscfiles_read_localization(postgresql_t)
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seutil_libselinux_linked(postgresql_t)
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userdom_dontaudit_use_unpriv_user_fds(postgresql_t)
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userdom_dontaudit_search_user_home_dirs(postgresql_t)
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userdom_dontaudit_use_user_terminals(postgresql_t)
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mta_getattr_spool(postgresql_t)
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tunable_policy(`allow_execmem',`
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allow postgresql_t self:process execmem;
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')
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optional_policy(`
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consoletype_exec(postgresql_t)
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')
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optional_policy(`
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cron_search_spool(postgresql_t)
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cron_system_entry(postgresql_t,postgresql_exec_t)
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')
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optional_policy(`
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hostname_exec(postgresql_t)
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')
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optional_policy(`
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ipsec_match_default_spd(postgresql_t)
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')
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optional_policy(`
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kerberos_use(postgresql_t)
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')
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optional_policy(`
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seutil_sigchld_newrole(postgresql_t)
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')
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optional_policy(`
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udev_read_db(postgresql_t)
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')
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########################################
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#
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# Rules common to all clients
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#
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allow sepgsql_client_type sepgsql_db_t:db_database { getattr access get_param set_param };
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type_transition sepgsql_client_type sepgsql_client_type:db_database sepgsql_db_t;
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allow sepgsql_client_type sepgsql_fixed_table_t:db_table { getattr use select insert lock };
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allow sepgsql_client_type sepgsql_fixed_table_t:db_column { getattr use select insert };
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allow sepgsql_client_type sepgsql_fixed_table_t:db_tuple { use select insert };
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allow sepgsql_client_type sepgsql_table_t:db_table { getattr use select update insert delete lock };
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allow sepgsql_client_type sepgsql_table_t:db_column { getattr use select update insert };
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allow sepgsql_client_type sepgsql_table_t:db_tuple { use select update insert delete };
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allow sepgsql_client_type sepgsql_ro_table_t:db_table { getattr use select lock };
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allow sepgsql_client_type sepgsql_ro_table_t:db_column { getattr use select };
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allow sepgsql_client_type sepgsql_ro_table_t:db_tuple { use select };
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allow sepgsql_client_type sepgsql_secret_table_t:db_table getattr;
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allow sepgsql_client_type sepgsql_secret_table_t:db_column getattr;
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allow sepgsql_client_type sepgsql_sysobj_t:db_table { getattr use select lock };
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allow sepgsql_client_type sepgsql_sysobj_t:db_column { getattr use select };
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allow sepgsql_client_type sepgsql_sysobj_t:db_tuple { use select };
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allow sepgsql_client_type sepgsql_proc_exec_t:db_procedure { getattr execute install };
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allow sepgsql_client_type sepgsql_trusted_proc_exec_t:db_procedure { getattr execute entrypoint };
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allow sepgsql_client_type sepgsql_blob_t:db_blob { create drop getattr setattr read write };
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allow sepgsql_client_type sepgsql_ro_blob_t:db_blob { getattr read };
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allow sepgsql_client_type sepgsql_secret_blob_t:db_blob getattr;
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# The purpose of the dontaudit rule in row-level access control is to prevent a flood of logs.
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# If a client tries to SELECT a table including violated tuples, these are filtered from
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# the result set as if not exist, but its access denied longs can be recorded within log files.
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# In generally, the number of tuples are much larger than the number of columns, tables and so on.
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# So, it makes a flood of logs when many tuples are violated.
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#
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# The default policy does not prevent anything for sepgsql_client_type sepgsql_unconfined_type,
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# so we don't need "dontaudit" rules in Type-Enforcement. However, MLS/MCS can prevent them
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# to access classified tuples and can make a audit record.
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#
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# Therefore, the following rule is applied for any domains which can connect SE-PostgreSQL.
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dontaudit { postgresql_t sepgsql_client_type sepgsql_unconfined_type } { sepgsql_table_type -sepgsql_sysobj_table_type }:db_tuple { use select update insert delete };
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########################################
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#
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# Unconfined access to this module
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#
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allow sepgsql_unconfined_type sepgsql_database_type:db_database *;
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type_transition sepgsql_unconfined_type sepgsql_unconfined_type:db_database sepgsql_db_t;
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type_transition sepgsql_unconfined_type sepgsql_database_type:db_table sepgsql_table_t;
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type_transition sepgsql_unconfined_type sepgsql_database_type:db_procedure sepgsql_proc_exec_t;
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type_transition sepgsql_unconfined_type sepgsql_database_type:db_blob sepgsql_blob_t;
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allow sepgsql_unconfined_type sepgsql_table_type:{ db_table db_column db_tuple } *;
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# unconfined domain is not allowed to invoke user defined procedure directly.
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# They have to confirm and relabel it at first.
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allow sepgsql_unconfined_type sepgsql_proc_exec_t:db_procedure *;
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allow sepgsql_unconfined_type sepgsql_trusted_proc_exec_t:db_procedure ~install;
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allow sepgsql_unconfined_type sepgsql_procedure_type:db_procedure ~{ execute install };
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allow sepgsql_unconfined_type sepgsql_blob_type:db_blob *;
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allow sepgsql_unconfined_type sepgsql_module_type:db_database install_module;
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kernel_relabelfrom_unlabeled_database(sepgsql_unconfined_type)
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