foreman-proxy.te

# vim: sw=4:ts=4:et
#
# Copyright 2013 Red Hat, Inc.
#
# This program and entire repository is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the License,
# or any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see http://www.gnu.org/licenses/.
#

policy_module(foreman-proxy, @@VERSION@@)

## <desc>
## <p>
## Generic support of DHCP plugin
## </p>
## </desc>
gen_tunable(foreman_proxy_manage_dhcp_generic, true)

## <desc>
## <p>
## ISC DHCP provider support
## </p>
## </desc>
gen_tunable(foreman_proxy_manage_dhcp_isc, true)

## <desc>
## <p>
## ISC DNS nsupdate provider support
## </p>
## </desc>
gen_tunable(foreman_proxy_manage_dns_nsupdate, true)

## <desc>
## <p>
## Generic support of TFTP plugin
## </p>
## </desc>
gen_tunable(foreman_proxy_manage_tftp, true)

## <desc>
## <p>
## Use Puppet API to load environments and classes
## </p>
## </desc>
gen_tunable(foreman_proxy_manage_puppet, true)

## <desc>
## <p>
## Puppet CA manipulation support
## </p>
## </desc>
gen_tunable(foreman_proxy_manage_puppetca, true)

## <desc>
## <p>
## Allow sudo or setuid for proxy (usually needed for puppet CA management)
## </p>
## </desc>
gen_tunable(foreman_proxy_use_sudo, true)

# FOREMAN PROXY POLICY

# basic types
type foreman_proxy_t;
type foreman_proxy_exec_t;
type foreman_proxy_tmp_t;
files_tmp_file(foreman_proxy_tmp_t)

# system service transition
init_daemon_domain(foreman_proxy_t, foreman_proxy_exec_t)

# PID file support
type foreman_proxy_var_run_t;
files_pid_file(foreman_proxy_var_run_t)
admin_pattern(foreman_proxy_t, foreman_proxy_var_run_t, foreman_proxy_var_run_t)

# logging support
type foreman_proxy_log_t;
logging_log_file(foreman_proxy_log_t)
manage_files_pattern(foreman_proxy_t, foreman_proxy_log_t , foreman_proxy_log_t)

# temp files support
manage_dirs_pattern(foreman_proxy_t, foreman_proxy_tmp_t, foreman_proxy_tmp_t)
manage_files_pattern(foreman_proxy_t, foreman_proxy_tmp_t, foreman_proxy_tmp_t)
manage_fifo_files_pattern(foreman_proxy_t, foreman_proxy_tmp_t, foreman_proxy_tmp_t)
files_tmp_filetrans(foreman_proxy_t, foreman_proxy_tmp_t, { file fifo_file dir })

# spool files support
type foreman_proxy_spool_t;
files_type(foreman_proxy_spool_t)
manage_dirs_pattern(foreman_proxy_t, foreman_proxy_spool_t, foreman_proxy_spool_t)
manage_files_pattern(foreman_proxy_t, foreman_proxy_spool_t, foreman_proxy_spool_t)
files_spool_filetrans(foreman_proxy_t, foreman_proxy_spool_t, { dir file })

# starting via /bin/env
corecmd_read_bin_symlinks(foreman_proxy_t)

# ruby runtime
corecmd_search_bin(foreman_proxy_t)
corecmd_exec_bin(foreman_proxy_t)
kernel_read_system_state(foreman_proxy_t)
dev_search_sysfs(foreman_proxy_t)
dev_read_rand(foreman_proxy_t)
dev_read_urand(foreman_proxy_t)
corecmd_exec_shell(foreman_proxy_t)

# ruby runtime - don't audit candidates
corenet_udp_bind_generic_port(foreman_proxy_t)
corenet_udp_bind_generic_node(foreman_proxy_t)
mta_sendmail_exec(foreman_proxy_t)
ifdef(`distro_rhel6', `
    gen_require(`
        type sendmail_exec_t;
    ')
    allow foreman_proxy_t sendmail_exec_t:file { getattr_file_perms execute };
',`
    mta_sendmail_access_check(foreman_proxy_t)
')

# gettext support
miscfiles_read_localization(foreman_proxy_t)

# generic networking support
corenet_tcp_connect_http_port(foreman_proxy_t)
sysnet_dns_name_resolve(foreman_proxy_t)
corenet_tcp_bind_generic_node(foreman_proxy_t)
allow foreman_proxy_t self:udp_socket { getattr ioctl create connect };
logging_send_syslog_msg(foreman_proxy_t)

# server networking
allow foreman_proxy_t self:tcp_socket { listen accept };
corenet_tcp_bind_http_port(foreman_proxy_t)
corenet_tcp_bind_websm_port(foreman_proxy_t)

# x509 certificates
hostname_exec(foreman_proxy_t)
puppet_read_lib(foreman_proxy_t)
ifdef(`distro_rhel6', `
    miscfiles_read_certs(foreman_proxy_t)
',`
    miscfiles_read_generic_certs(foreman_proxy_t)
')

# generic support for plugins
# executes sudo
optional_policy(`
    tunable_policy(`foreman_proxy_use_sudo', `
        sudo_exec(foreman_proxy_t)
        allow foreman_proxy_t self:process { setsched setrlimit };
        allow foreman_proxy_t self:capability { sys_resource setuid setgid };
        logging_send_audit_msgs(foreman_proxy_t)
    ')
')

# PUPPET PROXY SUPPORT
tunable_policy(`foreman_proxy_manage_puppet', `
    gen_require(`
        type puppet_etc_t, puppet_var_lib_t;
    ')
    # connect to puppet
    corenet_tcp_connect_puppet_port(foreman_proxy_t)
    # read configs and manage puppet files
    puppet_read_config(foreman_proxy_t)
    puppet_manage_lib(foreman_proxy_t)
')

# PUPPET CA SUPPORT

# This line will not be effective until puppetca/start-puppet-ca wrappers has
# the correct file labels:
# RHEL6: https://bugzilla.redhat.com/show_bug.cgi?id=1131400
# RHEL7: https://bugzilla.redhat.com/show_bug.cgi?id=1160727
#puppet_domtrans_puppetca(foreman_proxy_t)

# Once the above RFEs are delivered, we can drop the following block which is
# o copy of puppetca policy. This can be removed once wrappers are available.
# <copy of puppetca_t policy>
tunable_policy(`foreman_proxy_manage_puppetca', `
    gen_require(`
        type puppet_etc_t, puppet_var_lib_t, puppet_log_t, puppet_var_run_t;
        type passwd_exec_t, useradd_exec_t;
    ')
    allow foreman_proxy_t passwd_exec_t:file { getattr_file_perms execute };
    allow foreman_proxy_t useradd_exec_t:file { getattr_file_perms execute };
    allow foreman_proxy_t self:capability { dac_override setgid setuid };
    allow foreman_proxy_t self:fifo_file rw_fifo_file_perms;
    allow foreman_proxy_t puppet_var_lib_t:dir list_dir_perms;
    manage_files_pattern(foreman_proxy_t, puppet_var_lib_t, puppet_var_lib_t)
    manage_dirs_pattern(foreman_proxy_t, puppet_var_lib_t, puppet_var_lib_t)
    allow foreman_proxy_t puppet_log_t:dir search_dir_perms;
    allow foreman_proxy_t puppet_var_run_t:dir search_dir_perms;
    kernel_read_kernel_sysctls(foreman_proxy_t)
    corecmd_exec_bin(foreman_proxy_t)
    corecmd_exec_shell(foreman_proxy_t)
    dev_read_urand(foreman_proxy_t)
    dev_search_sysfs(foreman_proxy_t)
    files_search_var_lib(foreman_proxy_t)
    selinux_validate_context(foreman_proxy_t)
    logging_search_logs(foreman_proxy_t)
    miscfiles_read_certs(foreman_proxy_t)
    seutil_read_file_contexts(foreman_proxy_t)
    # signing support
    manage_files_pattern(foreman_proxy_t, puppet_etc_t, puppet_etc_t)
    usermanage_access_check_groupadd(foreman_proxy_t)
')
# for technical reasons, the following interfaces cannot be used in tunable_policy
kernel_read_system_state(foreman_proxy_t)
# </copy of puppetca_t policy>

# TFTP PLUGIN
tunable_policy(`foreman_proxy_manage_tftp', `
    tftp_read_content(foreman_proxy_t)
    tftp_manage_rw_content(foreman_proxy_t)

    # PXELinux configuration files has cobbler_var_lib_t type
    # <cobblerd_admin>
    gen_require(`
        type cobbler_var_lib_t, cobbler_var_log_t;
    ')
    files_search_var_lib(foreman_proxy_t)
    admin_pattern(foreman_proxy_t, cobbler_var_lib_t)
    # </cobblerd_admin>
')

tunable_policy(`foreman_proxy_manage_dns_nsupdate', `
    # Since nsupdate has bin_t and there are no suitable interfaces
    # in the core policy, we do not transition.
    allow foreman_proxy_t self:process signal;
    bind_read_config(foreman_proxy_t)
    bind_read_dnssec_keys(foreman_proxy_t)
    bind_search_cache(foreman_proxy_t)
    bind_manage_cache(foreman_proxy_t)
    bind_read_zone(foreman_proxy_t)
    bind_manage_zone(foreman_proxy_t)
')

# DHCP PLUGIN
tunable_policy(`foreman_proxy_manage_dhcp_generic', `
    # ping support via ECHO TCP service
    ifdef(`distro_rhel6', `
        corenet_tcp_connect_inetd_child_port(foreman_proxy_t)
    ',`
        corenet_tcp_connect_echo_port(foreman_proxy_t)
    ')
    # ping support via ICMP /usr/bin/ping (it has suid)
    ifndef(`distro_rhel6', `
        auth_read_passwd(foreman_proxy_t)
    ')
    netutils_domtrans_ping(foreman_proxy_t)
')

tunable_policy(`foreman_proxy_manage_dhcp_isc', `
    # read /etc/dhcp configs
    sysnet_rw_dhcp_config(foreman_proxy_t)

    # <dhcpd_admin>
    gen_require(`
        type dhcpd_t, dhcpd_tmp_t, dhcpd_state_t;
        type dhcpd_var_run_t, dhcpd_initrc_exec_t;
    ')

    files_list_var_lib(foreman_proxy_t)
    admin_pattern(foreman_proxy_t, dhcpd_state_t)

    files_list_pids(foreman_proxy_t)
    admin_pattern(foreman_proxy_t, dhcpd_var_run_t)
    # </dhcpd_admin>

    # Since omshell has bin_t and there are no suitable interfaces
    # in the core policy, we do not transition.
    allow foreman_proxy_t self:unix_dgram_socket { create connect };
    corenet_tcp_connect_dhcpd_port(foreman_proxy_t)
    corenet_udp_sendrecv_dhcpd_port(foreman_proxy_t)
')