add lpd

refpolicy/Changelog

@@ -7,6 +7,7 @@
 	cyrus
 	dovecot
 	distcc
+	lpd
 	networkmanager
 	xdm
 

refpolicy/policy/modules/kernel/devices.if

@@ -1410,6 +1410,24 @@ interface(`dev_setattr_printer',`
 	allow $1 printer_device_t:chr_file setattr;
 ')
 
+########################################
+## <summary>
+##	Append the printer device.
+## </summary>
+## <param name="domain">
+##	Domain allowed access.
+## </param>
+#
+# cjp: added for lpd/checkpc_t
+interface(`dev_append_printer',`
+	gen_require(`
+		type device_t, printer_device_t;
+	')
+
+	allow $1 device_t:dir search;
+	allow $1 printer_device_t:chr_file { getattr append };
+')
+
 ########################################
 ## <summary>
 ##	Read and write the printer device.

refpolicy/policy/modules/services/lpd.fc

@@ -0,0 +1,10 @@
+
+/dev/printer		-s	gen_context(system_u:object_r:printer_t,s0)
+
+/usr/sbin/checkpc	--	gen_context(system_u:object_r:checkpc_exec_t,s0)
+/usr/sbin/lpd		--	gen_context(system_u:object_r:lpd_exec_t,s0)
+
+/usr/share/printconf/.* --	gen_context(system_u:object_r:printconf_t,s0)
+
+/var/spool/lpd(/.*)?		gen_context(system_u:object_r:print_spool_t,s0)
+/var/run/lprng(/.*)?		gen_context(system_u:object_r:lpd_var_run_t,s0)

refpolicy/policy/modules/services/lpd.if

@@ -0,0 +1,81 @@
+## <summary>Line printer daemon</summary>
+
+########################################
+## <summary>
+##	Execute lpd in the lpd domain.
+## </summary>
+## <param name="domain">
+##	Domain allowed access.
+## </param>
+#
+interface(`lpd_domtrans_checkpc',`
+	gen_require(`
+		type checkpc_t, checkpc_exec_t;
+	')
+
+	domain_auto_trans($1,checkpc_exec_t,checkpc_t)
+
+	allow $1 checkpc_t:fd use;
+	allow checkpc_t $1:fd use;
+	allow checkpc_t $1:fifo_file rw_file_perms;
+	allow checkpc_t $1:process sigchld;
+')
+
+########################################
+## <summary>
+##	Execute amrecover in the lpd domain, and
+##	allow the specified role the lpd domain.
+## </summary>
+## <param name="domain">
+##	Domain allowed access.
+## </param>
+## <param name="role">
+##	The role to be allowed the lpd domain.
+## </param>
+## <param name="terminal">
+##	The type of the terminal allow the lpd domain to use.
+## </param>
+#
+interface(`lpd_run_checkpc',`
+	gen_require(`
+		type checkpc_t;
+	')
+
+	lpd_domtrans_checkpc($1)
+	role $2 types checkpc_t;
+	allow checkpc_t $3:chr_file rw_term_perms;
+')
+
+########################################
+## <summary>
+##	List the contents of the printer spool directories.
+## </summary>
+## <param name="domain">
+##	Domain allowed access.
+## </param>
+#
+interface(`lpd_list_spool',`
+	gen_require(`
+		type print_spool_t;
+	')
+
+	files_search_spool($1)
+	allow $1 print_spool_t:dir list_dir_perms;
+')
+
+########################################
+## <summary>
+##	List the contents of the printer spool directories.
+## </summary>
+## <param name="domain">
+##	Domain allowed access.
+## </param>
+#
+interface(`lpd_read_config',`
+	gen_require(`
+		type printconf_t;
+	')
+
+	allow $1 printconf_t:dir list_dir_perms;
+	allow $1 printconf_t:file r_file_perms;
+')

refpolicy/policy/modules/services/lpd.te

@@ -0,0 +1,235 @@
+
+policy_module(lpd,1.0)
+
+########################################
+#
+# Declarations
+#
+
+type checkpc_t;
+type checkpc_exec_t;
+init_system_domain(checkpc_t,checkpc_exec_t)
+role system_r types checkpc_t;
+
+type checkpc_log_t;
+logging_log_file(checkpc_log_t)
+
+type lpd_t;
+type lpd_exec_t;
+init_daemon_domain(lpd_t,lpd_exec_t)
+
+type lpd_tmp_t;
+files_tmp_file(lpd_tmp_t)
+
+type lpd_var_run_t;
+files_pid_file(lpd_var_run_t)
+
+type print_spool_t;
+files_tmp_file(print_spool_t)
+
+type printer_t;
+files_type(printer_t)
+
+type printconf_t;
+files_type(printconf_t)
+
+########################################
+#
+# Checkpc local policy
+#
+
+# Allow checkpc to access the lpd spool so it can check & fix it.
+# This requires that /usr/sbin/checkpc have type checkpc_t.
+
+allow checkpc_t self:capability { setgid setuid dac_override };
+allow checkpc_t self:process { fork signal_perms };
+allow checkpc_t self:unix_stream_socket create_socket_perms;
+
+allow checkpc_t checkpc_log_t:file create_file_perms;
+logging_create_log(checkpc_t,checkpc_log_t)
+
+allow checkpc_t lpd_var_run_t:dir { search getattr };
+files_search_pids(checkpc_t)
+
+allow checkpc_t print_spool_t:file { rw_file_perms unlink };
+allow checkpc_t print_spool_t:dir { read write search add_name remove_name getattr };
+files_search_spool(checkpc_t)
+
+allow checkpc_t printconf_t:file getattr;
+allow checkpc_t printconf_t:dir { getattr search read };
+
+kernel_read_system_state(checkpc_t)
+
+allow checkpc_t self:tcp_socket create_socket_perms;
+allow checkpc_t self:udp_socket create_socket_perms;
+corenet_tcp_sendrecv_all_if(checkpc_t)
+corenet_udp_sendrecv_all_if(checkpc_t)
+corenet_raw_sendrecv_all_if(checkpc_t)
+corenet_tcp_sendrecv_all_nodes(checkpc_t)
+corenet_udp_sendrecv_all_nodes(checkpc_t)
+corenet_raw_sendrecv_all_nodes(checkpc_t)
+corenet_tcp_sendrecv_all_ports(checkpc_t)
+corenet_udp_sendrecv_all_ports(checkpc_t)
+corenet_tcp_bind_all_nodes(checkpc_t)
+corenet_udp_bind_all_nodes(checkpc_t)
+corenet_tcp_connect_all_ports(checkpc_t)
+
+dev_append_printer(checkpc_t)
+
+# This is less desirable, but checkpc demands /bin/bash and /bin/chown:
+corecmd_exec_shell(checkpc_t)
+corecmd_exec_bin(checkpc_t)
+
+domain_use_wide_inherit_fd(checkpc_t)
+
+files_read_etc_files(checkpc_t)
+files_read_etc_runtime_files(checkpc_t)
+
+init_use_script_pty(checkpc_t)
+# Allow access to /dev/console through the fd:
+init_use_fd(checkpc_t)
+
+libs_use_ld_so(checkpc_t)
+libs_use_shared_libs(checkpc_t)
+
+sysnet_read_config(checkpc_t)
+
+optional_policy(`cron.te',`
+	cron_system_entry(checkpc_t,checkpc_exec_t)
+')
+
+optional_policy(`logging.te',`
+	logging_send_syslog_msg(checkpc_t)
+')
+
+optional_policy(`nis.te',`
+	nis_use_ypbind(checkpc_t)
+')
+
+########################################
+#
+# Lpd local policy
+#
+
+allow lpd_t self:capability { setgid setuid net_bind_service dac_read_search dac_override chown fowner };
+dontaudit lpd_t self:capability sys_tty_config;
+allow lpd_t self:fifo_file rw_file_perms;
+allow lpd_t self:unix_stream_socket create_stream_socket_perms;
+allow lpd_t self:unix_dgram_socket create_socket_perms;
+
+allow lpd_t lpd_tmp_t:dir create_dir_perms;
+allow lpd_t lpd_tmp_t:file create_file_perms;
+files_create_tmp_files(lpd_t, lpd_tmp_t, { file dir })
+
+allow lpd_t lpd_var_run_t:dir rw_dir_perms;
+allow lpd_t lpd_var_run_t:file create_file_perms;
+allow lpd_t lpd_var_run_t:sock_file create_file_perms;
+files_create_pid(lpd_t,lpd_var_run_t)
+
+# Write to /var/spool/lpd.
+allow lpd_t print_spool_t:dir rw_dir_perms;
+allow lpd_t print_spool_t:file create_file_perms;
+allow lpd_t print_spool_t:file rw_file_perms;
+files_search_spool(lpd_t)
+
+# lpd must be able to execute the filter utilities in /usr/share/printconf.
+allow lpd_t printconf_t:dir { getattr search read };
+can_exec(lpd_t, printconf_t)
+
+# Create and bind to /dev/printer.
+allow lpd_t printer_t:lnk_file create_lnk_perms;
+dev_create_dev_node(lpd_t,printer_t,lnk_file)
+# cjp: I believe these have no effect:
+allow lpd_t printer_t:unix_stream_socket name_bind;
+allow lpd_t printer_t:unix_dgram_socket name_bind;
+
+kernel_read_kernel_sysctl(lpd_t)
+# bash wants access to /proc/meminfo
+kernel_read_system_state(lpd_t)
+
+allow lpd_t self:tcp_socket create_stream_socket_perms;
+allow lpd_t self:udp_socket create_stream_socket_perms;
+corenet_tcp_sendrecv_all_if(lpd_t)
+corenet_udp_sendrecv_all_if(lpd_t)
+corenet_raw_sendrecv_all_if(lpd_t)
+corenet_tcp_sendrecv_all_nodes(lpd_t)
+corenet_udp_sendrecv_all_nodes(lpd_t)
+corenet_raw_sendrecv_all_nodes(lpd_t)
+corenet_tcp_sendrecv_all_ports(lpd_t)
+corenet_udp_sendrecv_all_ports(lpd_t)
+corenet_tcp_bind_all_nodes(lpd_t)
+corenet_udp_bind_all_nodes(lpd_t)
+corenet_tcp_bind_printer_port(lpd_t)
+
+dev_read_sysfs(lpd_t)
+dev_rw_printer(lpd_t)
+
+fs_getattr_all_fs(lpd_t)
+fs_search_auto_mountpoints(lpd_t)
+
+term_dontaudit_use_console(lpd_t)
+
+# Filter scripts may be shell scripts, and may invoke progs like /bin/mktemp
+corecmd_exec_bin(lpd_t)
+corecmd_exec_sbin(lpd_t)
+corecmd_exec_shell(lpd_t)
+
+domain_use_wide_inherit_fd(lpd_t)
+
+files_read_etc_runtime_files(lpd_t)
+files_read_usr_files(lpd_t)
+# for defoma
+files_list_world_readable(lpd_t)
+files_read_world_readable_files(lpd_t)
+files_read_world_readable_symlinks(lpd_t)
+files_list_var_lib(lpd_t)
+files_read_var_lib_files(lpd_t)
+files_read_var_lib_symlinks(lpd_t)
+# config files for lpd are of type etc_t, probably should change this
+files_read_etc_files(lpd_t)
+
+init_use_fd(lpd_t)
+init_use_script_pty(lpd_t)
+
+libs_use_ld_so(lpd_t)
+libs_use_shared_libs(lpd_t)
+
+logging_send_syslog_msg(lpd_t)
+
+miscfiles_read_fonts(lpd_t)
+miscfiles_read_localization(lpd_t)
+
+sysnet_read_config(lpd_t)
+
+userdom_dontaudit_use_unpriv_user_fd(lpd_t)
+userdom_dontaudit_search_sysadm_home_dir(lpd_t)
+
+ifdef(`targeted_policy',`
+	term_dontaudit_use_unallocated_tty(lpd_t)
+	term_dontaudit_use_generic_pty(lpd_t)
+	files_dontaudit_read_root_file(lpd_t)
+')
+
+optional_policy(`nis.te',`
+	nis_use_ypbind(lpd_t)
+	nis_tcp_connect_ypbind(lpd_t)
+')
+
+optional_policy(`portmap.te',`
+	portmap_udp_sendto(lpd_t)
+')
+
+optional_policy(`selinuxutil.te',`
+	seutil_sigchld_newrole(lpd_t)
+')
+
+optional_policy(`udev.te', `
+	udev_read_db(lpd_t)
+')
+
+ifdef(`TODO',`
+optional_policy(`rhgb.te',`
+	rhgb_domain(lpd_t)
+')
+') dnl end TODO
+

refpolicy/policy/modules/services/nis.if

@@ -133,7 +133,7 @@ interface(`nis_signal_ypbind',`
 
 ########################################
 ## <summary>
-##	Send UDP network traffic to NIS clients.
+##	List the contents of the NIS data directory.
 ## </summary>
 ## <param name="domain">
 ##	The type of the process performing this action.
@@ -164,3 +164,21 @@ interface(`nis_udp_sendto_ypbind',`
 	allow $1 ypbind_t:udp_socket sendto;
 	allow ypbind_t $1:udp_socket recvfrom;
 ')
+
+########################################
+## <summary>
+##	Connect to ypbind over TCP.
+## </summary>
+## <param name="domain">
+##	Domain allowed access.
+## </param>
+#
+interface(`nis_tcp_connect_ypbind',`
+	gen_require(`
+		type ypbind_t;
+	')
+
+	allow $1 ypbind_t:tcp_socket { connectto recvfrom };
+	allow ypbind_t $1:tcp_socket { acceptfrom recvfrom };
+	allow $1 kernel_t:tcp_socket recvfrom;
+')

refpolicy/policy/modules/services/nis.te

@@ -58,6 +58,7 @@ allow ypbind_t var_yp_t:file create_file_perms;
 kernel_read_kernel_sysctl(ypbind_t)
 kernel_list_proc(ypbind_t)
 kernel_read_proc_symlinks(ypbind_t)
+kernel_tcp_recvfrom(ypbind_t)
 
 corenet_tcp_sendrecv_all_if(ypbind_t)
 corenet_udp_sendrecv_all_if(ypbind_t)

refpolicy/policy/modules/system/corecommands.fc

@@ -106,6 +106,7 @@ ifdef(`distro_suse', `
 /usr/share/gnucash/finance-quote-check -- gen_context(system_u:object_r:bin_t,s0)
 /usr/share/gnucash/finance-quote-helper -- gen_context(system_u:object_r:bin_t,s0)
 /usr/share/mc/extfs/.*	--	gen_context(system_u:object_r:bin_t,s0)
+/usr/share/printconf/util/print\.py -- gen_context(system_u:object_r:bin_t,s0)
 /usr/share/turboprint/lib(/.*)? -- gen_context(system_u:object_r:bin_t,s0)
 
 ifdef(`distro_suse',`

refpolicy/policy/modules/system/init.te

@@ -505,6 +505,17 @@ optional_policy(`loadkeys.te',`
 	loadkeys_exec(initrc_t)
 ')
 
+optional_policy(`lpd.te',`
+	# This is needed to permit chown to read /var/spool/lpd/lp.
+	# This is opens up security more than necessary; this means that ANYTHING
+	# running in the initrc_t domain can read the printer spool directory.
+	# Perhaps executing /etc/rc.d/init.d/lpd should transition
+	# to domain lpd_t, instead of waiting for executing lpd.
+	lpd_list_spool(initrc_t)
+
+	lpd_read_config(initrc_t)
+')
+
 optional_policy(`lvm.te',`
 	#allow initrc_t lvm_control_t:chr_file unlink;
 

refpolicy/policy/modules/system/userdomain.te

@@ -190,6 +190,10 @@ ifdef(`targeted_policy',`
 		logrotate_run(sysadm_t,sysadm_r,admin_terminal)
 	')
 
+	optional_policy(`lpd.te',`
+		lpd_run_checkpc(sysadm_t,sysadm_r,admin_terminal)
+	')
+
 	optional_policy(`kudzu.te',`
 		kudzu_run(sysadm_t,sysadm_r,admin_terminal)
 	')