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freeipa/ipaplatform/debian/paths.py
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Cédric Jeanneret 6c27104467 Prevents DNS Amplification Attack and allow to customize named 
While [1] did open recursion, it also opened widely a security flaw.

This patch intends to close it back, while allowing operators to easily
add their open configuration within Bind9.

In order to allow operators to still open Bind recursion, a new file is
introduced, "ipa-ext.conf" (path might change according to the OS). This
file is not managed by the installer, meaning changes to it won't be
overridden.
Since it's included at the very end of the main configuration file, it
also allows to override some defaults - of course, operators have to be
careful with that.

Related-Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1754530
Fixes: https://pagure.io/freeipa/issue/8079

[1] https://github.com/freeipa/freeipa/commit/5f4c75eb28b3d50a35fbf3a86a6d842bce8e72f9

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Stanislav Levin <slev@altlinux.org>
2019-11-12 10:49:49 +02:00

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#
# Copyright (C) 2017 FreeIPA Contributors see COPYING for license
#
"""
This Debian base platform module exports default filesystem paths as common
in Debian-based systems.
"""
# Fallback to default path definitions
from __future__ import absolute_import
from ipaplatform.base.paths import BasePathNamespace
import sysconfig
MULTIARCH = sysconfig.get_config_var('MULTIARCH')
class DebianPathNamespace(BasePathNamespace):
BIN_HOSTNAMECTL = "/usr/bin/hostnamectl"
AUTOFS_LDAP_AUTH_CONF = "/etc/autofs_ldap_auth.conf"
ETC_HTTPD_DIR = "/etc/apache2"
HTTPD_ALIAS_DIR = "/etc/apache2/nssdb"
ALIAS_CACERT_ASC = "/etc/apache2/nssdb/cacert.asc"
ALIAS_PWDFILE_TXT = "/etc/apache2/nssdb/pwdfile.txt"
HTTPD_CONF_D_DIR = "/etc/apache2/conf-enabled/"
HTTPD_IPA_KDCPROXY_CONF_SYMLINK = "/etc/apache2/conf-enabled/ipa-kdc-proxy.conf"
HTTPD_IPA_PKI_PROXY_CONF = "/etc/apache2/conf-enabled/ipa-pki-proxy.conf"
HTTPD_IPA_REWRITE_CONF = "/etc/apache2/conf-available/ipa-rewrite.conf"
HTTPD_IPA_CONF = "/etc/apache2/conf-enabled/ipa.conf"
HTTPD_NSS_CONF = "/etc/apache2/mods-available/nss.conf"
HTTPD_SSL_CONF = "/etc/apache2/mods-available/ssl.conf"
HTTPD_SSL_SITE_CONF = "/etc/apache2/sites-available/default-ssl.conf"
OLD_IPA_KEYTAB = "/etc/apache2/ipa.keytab"
HTTPD_PASSWORD_CONF = "/etc/apache2/password.conf"
NAMED_CONF = "/etc/bind/named.conf"
NAMED_CUSTOM_CONFIG = "/etc/bind/ipa-ext.conf"
NAMED_VAR_DIR = "/var/cache/bind"
NAMED_KEYTAB = "/etc/bind/named.keytab"
NAMED_RFC1912_ZONES = "/etc/bind/named.conf.default-zones"
NAMED_ROOT_KEY = "/etc/bind/bind.keys"
NAMED_BINDKEYS_FILE = "/etc/bind/bind.keys"
NAMED_MANAGED_KEYS_DIR = "/var/cache/bind/dynamic"
CHRONY_CONF = "/etc/chrony/chrony.conf"
OPENLDAP_LDAP_CONF = "/etc/ldap/ldap.conf"
ETC_DEBIAN_VERSION = "/etc/debian_version"
IPA_P11_KIT = "/usr/local/share/ca-certificates/ipa-ca.crt"
ETC_SYSCONFIG_DIR = "/etc/default"
SYSCONFIG_AUTOFS = "/etc/default/autofs"
SYSCONFIG_DIRSRV = "/etc/default/dirsrv"
SYSCONFIG_DIRSRV_INSTANCE = "/etc/default/dirsrv-%s"
SYSCONFIG_DIRSRV_SYSTEMD = "/etc/default/dirsrv.systemd"
SYSCONFIG_IPA_DNSKEYSYNCD = "/etc/default/ipa-dnskeysyncd"
SYSCONFIG_IPA_ODS_EXPORTER = "/etc/default/ipa-ods-exporter"
SYSCONFIG_KRB5KDC_DIR = "/etc/default/krb5-kdc"
SYSCONFIG_NAMED = "/etc/default/bind9"
SYSCONFIG_NFS = "/etc/default/nfs-common"
SYSCONFIG_NTPD = "/etc/default/ntp"
SYSCONFIG_ODS = "/etc/default/opendnssec"
SYSCONFIG_PKI = "/etc/dogtag/"
SYSCONFIG_PKI_TOMCAT = "/etc/default/pki-tomcat"
SYSCONFIG_PKI_TOMCAT_PKI_TOMCAT_DIR = "/etc/dogtag/tomcat/pki-tomcat"
SYSTEMD_SYSTEM_HTTPD_D_DIR = "/etc/systemd/system/apache2.service.d/"
SYSTEMD_SYSTEM_HTTPD_IPA_CONF = "/etc/systemd/system/apache2.service.d/ipa.conf"
DNSSEC_TRUSTED_KEY = "/etc/bind/trusted-key.key"
GSSAPI_SESSION_KEY = "/etc/apache2/ipasession.key"
OLD_KRA_AGENT_PEM = "/etc/apache2/nssdb/kra-agent.pem"
SBIN_SERVICE = "/usr/sbin/service"
CERTMONGER_COMMAND_TEMPLATE = "/usr/lib/ipa/certmonger/%s"
ODS_KSMUTIL = None
ODS_ENFORCER = "/usr/sbin/ods-enforcer"
ODS_ENFORCER_DB_SETUP = "/usr/sbin/ods-enforcer-db-setup"
UPDATE_CA_TRUST = "/usr/sbin/update-ca-certificates"
BIND_LDAP_DNS_IPA_WORKDIR = "/var/cache/bind/dyndb-ldap/ipa/"
BIND_LDAP_DNS_ZONE_WORKDIR = "/var/cache/bind/dyndb-ldap/ipa/master/"
LIBARCH = "/{0}".format(MULTIARCH)
LIBSOFTHSM2_SO = "/usr/lib/softhsm/libsofthsm2.so"
PAM_KRB5_SO = "/usr/lib/{0}/security/pam_krb5.so".format(MULTIARCH)
LIB_SYSTEMD_SYSTEMD_DIR = "/lib/systemd/system/"
LIBEXEC_CERTMONGER_DIR = "/usr/lib/certmonger"
DOGTAG_IPA_CA_RENEW_AGENT_SUBMIT = "/usr/lib/certmonger/dogtag-ipa-ca-renew-agent-submit"
DOGTAG_IPA_RENEW_AGENT_SUBMIT = "/usr/lib/certmonger/dogtag-ipa-renew-agent-submit"
CERTMONGER_DOGTAG_SUBMIT = "/usr/lib/certmonger/dogtag-submit"
IPA_SERVER_GUARD = "/usr/lib/certmonger/ipa-server-guard"
GENERATE_RNDC_KEY = "/bin/true"
LIBEXEC_IPA_DIR = "/usr/lib/ipa"
IPA_DNSKEYSYNCD_REPLICA = "/usr/lib/ipa/ipa-dnskeysync-replica"
IPA_DNSKEYSYNCD = "/usr/lib/ipa/ipa-dnskeysyncd"
IPA_HTTPD_KDCPROXY = "/usr/lib/ipa/ipa-httpd-kdcproxy"
IPA_ODS_EXPORTER = "/usr/lib/ipa/ipa-ods-exporter"
IPA_PKI_RETRIEVE_KEY = "/usr/lib/ipa/ipa-pki-retrieve-key"
IPA_HTTPD_PASSWD_READER = "/usr/lib/ipa/ipa-httpd-pwdreader"
IPA_PKI_WAIT_RUNNING = "/usr/lib/ipa/ipa-pki-wait-running"
HTTPD = "/usr/sbin/apache2ctl"
FONTS_DIR = "/usr/share/fonts/truetype"
FONTS_OPENSANS_DIR = "/usr/share/fonts/truetype/open-sans"
FONTS_FONTAWESOME_DIR = "/usr/share/fonts/truetype/fontawesome"
VAR_KERBEROS_KRB5KDC_DIR = "/var/lib/krb5kdc/"
VAR_KRB5KDC_K5_REALM = "/var/lib/krb5kdc/.k5."
CACERT_PEM = "/var/lib/ipa/certs/cacert.pem"
KRB5KDC_KADM5_ACL = "/etc/krb5kdc/kadm5.acl"
KRB5KDC_KADM5_KEYTAB = "/etc/krb5kdc/kadm5.keytab"
KRB5KDC_KDC_CONF = "/etc/krb5kdc/kdc.conf"
KDC_CERT = "/var/lib/ipa/certs/kdc.crt"
KDC_KEY = "/var/lib/ipa/certs/kdc.key"
VAR_LOG_HTTPD_DIR = "/var/log/apache2"
VAR_LOG_HTTPD_ERROR = "/var/log/apache2/error.log"
NAMED_RUN = "/var/cache/bind/named.run"
VAR_OPENDNSSEC_DIR = "/var/lib/opendnssec"
OPENDNSSEC_KASP_DB = "/var/lib/opendnssec/db/kasp.db"
IPA_ODS_EXPORTER_CCACHE = "/var/lib/opendnssec/tmp/ipa-ods-exporter.ccache"
IPA_CUSTODIA_SOCKET = "/run/apache2/ipa-custodia.sock"
IPA_CUSTODIA_AUDIT_LOG = '/var/log/ipa-custodia.audit.log'
IPA_CUSTODIA_HANDLER = "/usr/lib/ipa/custodia"
WSGI_PREFIX_DIR = "/run/apache2/wsgi"
paths = DebianPathNamespace()
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