#DESC Lpd - Print server

#

# Authors:  Stephen Smalley <sds@epoch.ncsc.mil> and Timothy Fraser  

# Modified by David A. Wheeler <dwheeler@ida.org> for LPRng (Red Hat 7.1)

# Modified by Russell Coker <russell@coker.com.au>

# X-Debian-Packages: lpr

#

#################################

#

# Rules for the lpd_t domain.

#

# lpd_t is the domain of lpd.

# lpd_exec_t is the type of the lpd executable.

# printer_t is the type of the Unix domain socket created

# by lpd.

#

type printer_port_t, port_type, reserved_port_type;

daemon_domain(lpd)

allow lpd_t lpd_var_run_t:sock_file create_file_perms;

r_dir_file(lpd_t, fonts_t)

type printer_t, file_type, sysadmfile, dev_fs;

type printconf_t, file_type, sysadmfile;   # Type for files in /usr/share/printconf.

tmp_domain(lpd);

# for postscript include files

allow lpd_t usr_t:{ file lnk_file } { getattr read };

# Allow checkpc to access the lpd spool so it can check & fix it.

# This requires that /usr/sbin/checkpc have type checkpc_t.

type checkpc_t, domain, privlog;

role system_r types checkpc_t;

uses_shlib(checkpc_t)

can_network_client(checkpc_t)

can_ypbind(checkpc_t)

log_domain(checkpc)

type checkpc_exec_t, file_type, sysadmfile, exec_type;

domain_auto_trans(initrc_t, checkpc_exec_t, checkpc_t)

domain_auto_trans(sysadm_t, checkpc_exec_t, checkpc_t)

role sysadm_r types checkpc_t;

allow checkpc_t admin_tty_type:chr_file { read write };

allow checkpc_t privfd:fd use;

ifdef(`crond.te', `

system_crond_entry(checkpc_exec_t, checkpc_t)

')

allow checkpc_t self:capability { setgid setuid dac_override };

allow checkpc_t self:process { fork signal_perms };

allow checkpc_t proc_t:dir search;

allow checkpc_t proc_t:lnk_file read;

allow checkpc_t proc_t:file { getattr read };

r_dir_file(checkpc_t, self)

allow checkpc_t self:unix_stream_socket create_socket_perms;

allow checkpc_t { etc_t etc_runtime_t }:file { getattr read };

allow checkpc_t etc_t:lnk_file read;

allow checkpc_t { var_t var_spool_t }:dir { getattr search };

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 };

allow checkpc_t device_t:dir search;

allow checkpc_t printer_device_t:chr_file { getattr append };

allow checkpc_t devtty_t:chr_file rw_file_perms;

allow checkpc_t initrc_devpts_t:chr_file rw_file_perms;

# Allow access to /dev/console through the fd:

allow checkpc_t init_t:fd use;

# This is less desirable, but checkpc demands /bin/bash and /bin/chown:

allow checkpc_t { bin_t sbin_t }:dir search;

allow checkpc_t bin_t:lnk_file read;

can_exec(checkpc_t, shell_exec_t)

can_exec(checkpc_t, bin_t)

# bash wants access to /proc/meminfo

allow lpd_t proc_t:file { getattr read };

# gs-gnu wants to read some sysctl entries, it seems to work without though

dontaudit lpd_t { sysctl_t sysctl_kernel_t }:dir search;

# for defoma

r_dir_file(lpd_t, var_lib_t)

allow checkpc_t var_run_t:dir search;

allow checkpc_t lpd_var_run_t:dir { search getattr };

# 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.

allow initrc_t print_spool_t:dir read;

# for defoma

r_dir_file(lpd_t, readable_t)

# Use capabilities.

allow lpd_t self:capability { setgid setuid net_bind_service dac_read_search dac_override chown fowner };

# Use the network.

can_network_server(lpd_t)

can_ypbind(lpd_t)

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 self:file { getattr read };

allow lpd_t etc_runtime_t:file { getattr read };

# Bind to the printer port.

allow lpd_t printer_port_t:tcp_socket name_bind;

# Send to portmap.

ifdef(`portmap.te', `can_udp_send(lpd_t, portmap_t)')

ifdef(`ypbind.te',

`# Connect to ypbind.

can_tcp_connect(lpd_t, ypbind_t)')

# Create and bind to /dev/printer.

file_type_auto_trans(lpd_t, device_t, printer_t, lnk_file)

allow lpd_t printer_t:unix_stream_socket name_bind;

allow lpd_t printer_t:unix_dgram_socket name_bind;

allow lpd_t printer_device_t:chr_file rw_file_perms;

# Write to /var/spool/lpd.

allow lpd_t var_spool_t:dir search;

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;

# Execute filter scripts.

# can_exec(lpd_t, print_spool_t)

# Filter scripts may be shell scripts, and may invoke progs like /bin/mktemp

allow lpd_t bin_t:dir search;

allow lpd_t bin_t:lnk_file read;

can_exec(lpd_t, { bin_t sbin_t shell_exec_t })

# lpd must be able to execute the filter utilities in /usr/share/printconf.

can_exec(lpd_t, printconf_t)

allow lpd_t printconf_t:file rx_file_perms;

allow lpd_t printconf_t:dir { getattr search read };

# config files for lpd are of type etc_t, probably should change this

allow lpd_t etc_t:file { getattr read };

allow lpd_t etc_t:lnk_file read;

# checkpc needs similar permissions.

allow checkpc_t printconf_t:file getattr;

allow checkpc_t printconf_t:dir { getattr search read };

# Read printconf files.

allow initrc_t printconf_t:dir r_dir_perms;

allow initrc_t printconf_t:file r_file_perms;