#!/bin/sh # Copyright (C) Internet Systems Consortium, Inc. ("ISC") # # SPDX-License-Identifier: MPL-2.0 # # This Source Code Form is subject to the terms of the Mozilla Public # License, v. 2.0. If a copy of the MPL was not distributed with this # file, you can obtain one at https://mozilla.org/MPL/2.0/. # # See the COPYRIGHT file distributed with this work for additional # information regarding copyright ownership. #shellcheck source=conf.sh SYSTEMTESTTOP=.. . "$SYSTEMTESTTOP/conf.sh" dig_with_opts() ( "$DIG" -p "$PORT" "$@" ) sendcmd() ( "$PERL" ../send.pl 10.53.0.6 "$EXTRAPORT1" ) rndccmd() { "$RNDC" -c ../common/rndc.conf -p "$CONTROLPORT" -s "$@" } root=10.53.0.1 hidden=10.53.0.2 f1=10.53.0.3 f2=10.53.0.4 status=0 n=0 n=$((n+1)) echo_i "checking that a forward zone overrides global forwarders ($n)" ret=0 dig_with_opts +noadd +noauth txt.example1. txt @$hidden > dig.out.$n.hidden || ret=1 dig_with_opts +noadd +noauth txt.example1. txt @$f1 > dig.out.$n.f1 || ret=1 digcomp dig.out.$n.hidden dig.out.$n.f1 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that a forward first zone no forwarders recurses ($n)" ret=0 dig_with_opts +noadd +noauth txt.example2. txt @$root > dig.out.$n.root || ret=1 dig_with_opts +noadd +noauth txt.example2. txt @$f1 > dig.out.$n.f1 || ret=1 digcomp dig.out.$n.root dig.out.$n.f1 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that a forward only zone no forwarders fails ($n)" ret=0 dig_with_opts +noadd +noauth txt.example2. txt @$root > dig.out.$n.root || ret=1 dig_with_opts +noadd +noauth txt.example2. txt @$f1 > dig.out.$n.f1 || ret=1 digcomp dig.out.$n.root dig.out.$n.f1 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that global forwarders work ($n)" ret=0 dig_with_opts +noadd +noauth txt.example4. txt @$hidden > dig.out.$n.hidden || ret=1 dig_with_opts +noadd +noauth txt.example4. txt @$f1 > dig.out.$n.f1 || ret=1 digcomp dig.out.$n.hidden dig.out.$n.f1 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that a forward zone works ($n)" ret=0 dig_with_opts +noadd +noauth txt.example1. txt @$hidden > dig.out.$n.hidden || ret=1 dig_with_opts +noadd +noauth txt.example1. txt @$f2 > dig.out.$n.f2 || ret=1 digcomp dig.out.$n.hidden dig.out.$n.f2 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that forwarding doesn't spontaneously happen ($n)" ret=0 dig_with_opts +noadd +noauth txt.example2. txt @$root > dig.out.$n.root || ret=1 dig_with_opts +noadd +noauth txt.example2. txt @$f2 > dig.out.$n.f2 || ret=1 digcomp dig.out.$n.root dig.out.$n.f2 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that a forward zone with no specified policy works ($n)" ret=0 dig_with_opts +noadd +noauth txt.example3. txt @$hidden > dig.out.$n.hidden || ret=1 dig_with_opts +noadd +noauth txt.example3. txt @$f2 > dig.out.$n.f2 || ret=1 digcomp dig.out.$n.hidden dig.out.$n.f2 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that a forward only doesn't recurse ($n)" ret=0 dig_with_opts txt.example5. txt @$f2 > dig.out.$n.f2 || ret=1 grep "SERVFAIL" dig.out.$n.f2 > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking for negative caching of forwarder response ($n)" # prime the cache, shutdown the forwarder then check that we can # get the answer from the cache. restart forwarder. ret=0 dig_with_opts nonexist. txt @10.53.0.5 > dig.out.$n.f2 || ret=1 grep "status: NXDOMAIN" dig.out.$n.f2 > /dev/null || ret=1 stop_server ns4 || ret=1 dig_with_opts nonexist. txt @10.53.0.5 > dig.out.$n.f2 || ret=1 grep "status: NXDOMAIN" dig.out.$n.f2 > /dev/null || ret=1 start_server --restart --noclean --port "${PORT}" ns4 || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) check_override() ( dig_with_opts 1.0.10.in-addr.arpa TXT @10.53.0.4 > dig.out.$n.f2 && grep "status: NOERROR" dig.out.$n.f2 > /dev/null && dig_with_opts 2.0.10.in-addr.arpa TXT @10.53.0.4 > dig.out.$n.f2 && grep "status: NXDOMAIN" dig.out.$n.f2 > /dev/null ) n=$((n+1)) echo_i "checking that forward only zone overrides empty zone ($n)" ret=0 # retry loop in case the server restart above causes transient failure retry_quiet 10 check_override || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that DS lookups for grafting forward zones are isolated ($n)" ret=0 dig_with_opts grafted A @10.53.0.4 > dig.out.$n.q1 || ret=1 dig_with_opts grafted DS @10.53.0.4 > dig.out.$n.q2 || ret=1 dig_with_opts grafted A @10.53.0.4 > dig.out.$n.q3 || ret=1 dig_with_opts grafted AAAA @10.53.0.4 > dig.out.$n.q4 || ret=1 grep "status: NOERROR" dig.out.$n.q1 > /dev/null || ret=1 grep "status: NXDOMAIN" dig.out.$n.q2 > /dev/null || ret=1 grep "status: NOERROR" dig.out.$n.q3 > /dev/null || ret=1 grep "status: NOERROR" dig.out.$n.q4 > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that rfc1918 inherited 'forward first;' zones are warned about ($n)" ret=0 $CHECKCONF rfc1918-inherited.conf | grep "forward first;" >/dev/null || ret=1 $CHECKCONF rfc1918-notinherited.conf | grep "forward first;" >/dev/null && ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that ULA inherited 'forward first;' zones are warned about ($n)" ret=0 $CHECKCONF ula-inherited.conf | grep "forward first;" >/dev/null || ret=1 $CHECKCONF ula-notinherited.conf | grep "forward first;" >/dev/null && ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) count_sent() ( logfile="$1" start_pattern="$2" pattern="$3" nextpartpeek "$logfile" | tr -d '\r' | sed -n "/$start_pattern/,/^\$/p" | grep -c "$pattern" ) check_sent() ( expected="$1" shift count=$(count_sent "$@") [ "$expected" = "$count" ] ) wait_for_log() ( nextpartpeek "$1" | grep "$2" >/dev/null ) n=$((n+1)) echo_i "checking that a forwarder timeout prevents it from being reused in the same fetch context ($n)" ret=0 # Make ans6 receive queries without responding to them. echo "//" | sendcmd # Query for a record in a zone which is forwarded to a non-responding forwarder # and is delegated from the root to check whether the forwarder will be retried # when a delegation is encountered after falling back to full recursive # resolution. nextpart ns3/named.run >/dev/null dig_with_opts txt.example7. txt @$f1 > dig.out.$n.f1 || ret=1 # The forwarder for the "example7" zone should only be queried once. start_pattern="sending packet to 10\.53\.0\.6" retry_quiet 5 wait_for_log ns3/named.run "$start_pattern" check_sent 1 ns3/named.run "$start_pattern" ";txt\.example7\.[[:space:]]*IN[[:space:]]*TXT$" || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that priming queries are not forwarded ($n)" ret=0 nextpart ns7/named.run >/dev/null dig_with_opts +noadd +noauth txt.example1. txt @10.53.0.7 > dig.out.$n.f7 || ret=1 received_pattern="received packet from 10\.53\.0\.1" start_pattern="sending packet to 10\.53\.0\.1" retry_quiet 5 wait_for_log ns7/named.run "$received_pattern" || ret=1 check_sent 1 ns7/named.run "$start_pattern" ";\.[[:space:]]*IN[[:space:]]*NS$" || ret=1 sent=$(grep -c "10.53.0.7#.* (.): query '\./NS/IN' approved" ns4/named.run) [ "$sent" -eq 0 ] || ret=1 sent=$(grep -c "10.53.0.7#.* (.): query '\./NS/IN' approved" ns1/named.run) [ "$sent" -eq 1 ] || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking recovery from forwarding to a non-recursive server ($n)" ret=0 dig_with_opts xxx.sld.tld txt @10.53.0.8 > dig.out.$n.f8 || ret=1 grep "status: NOERROR" dig.out.$n.f8 > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking that rebinding protection works in forward only mode ($n)" ret=0 # 10.53.0.5 will forward target.malicious. query to 10.53.0.4 # which in turn will return a CNAME for subdomain.rebind. # to honor the option deny-answer-aliases { "rebind"; }; # ns5 should return a SERVFAIL to avoid potential rebinding attacks dig_with_opts +noadd +noauth @10.53.0.5 target.malicious. > dig.out.$n || ret=1 grep "status: SERVFAIL" dig.out.$n > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking switch from forwarding to normal resolution while chasing DS ($n)" ret=0 copy_setports ns3/named2.conf.in ns3/named.conf rndccmd 10.53.0.3 reconfig 2>&1 | sed 's/^/ns3 /' | cat_i sleep 1 sendcmd << EOF /ns1.sld.tld/A/ 300 A 10.53.0.2 /sld.tld/NS/ 300 NS ns1.sld.tld. /sld.tld/ EOF nextpart ns3/named.run >/dev/null dig_with_opts @$f1 xxx.yyy.sld.tld ds > dig.out.$n.f1 || ret=1 grep "status: SERVFAIL" dig.out.$n.f1 > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) # # Check various spoofed response scenarios. The same tests will be # run twice, with "forward first" and "forward only" configurations. # run_spooftests () { n=$((n+1)) echo_i "checking spoofed response scenario 1 - out of bailiwick NS ($n)" ret=0 # prime dig_with_opts @10.53.0.9 attackSecureDomain.net > dig.out.$n.prime || ret=1 # check 'net' is not poisoned. dig_with_opts @10.53.0.9 diditwork.net. TXT > dig.out.$n.net || ret=1 grep '^diditwork\.net\..*TXT.*"recursed"' dig.out.$n.net > /dev/null || ret=1 # check 'sub.local.net' is not poisoned. dig_with_opts @10.53.0.9 sub.local.net TXT > dig.out.$n.sub || ret=1 grep '^sub\.local\.net\..*TXT.*"recursed"' dig.out.$n.sub > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking spoofed response scenario 2 - inject DNAME/net2. ($n)" ret=0 # prime dig_with_opts @10.53.0.9 attackSecureDomain.net2 > dig.out.$n.prime || ret=1 # check that net2/DNAME is not cached dig_with_opts @10.53.0.9 net2. DNAME > dig.out.$n.net2 || ret=1 grep "ANSWER: 0," dig.out.$n.net2 > /dev/null || ret=1 grep "status: NXDOMAIN" dig.out.$n.net2 > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking spoofed response scenario 3 - extra answer ($n)" ret=0 # prime dig_with_opts @10.53.0.9 attackSecureDomain.net3 > dig.out.$n.prime || ret=1 # check extra net3 records are not cached rndccmd 10.53.0.9 dumpdb -cache 2>&1 | sed 's/^/ns9 /' | cat_i for try in 1 2 3 4 5; do lines=$(grep "net3" ns9/named_dump.db | wc -l) if [ ${lines} -eq 0 ]; then sleep 1 continue fi [ ${lines} -eq 1 ] || ret=1 grep -q '^attackSecureDomain.net3' ns9/named_dump.db || ret=1 grep -q '^local.net3' ns9/named_dump.db && ret=1 done if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) } echo_i "checking spoofed response scenarios with forward first zones" run_spooftests copy_setports ns9/named2.conf.in ns9/named.conf rndccmd 10.53.0.9 reconfig 2>&1 | sed 's/^/ns3 /' | cat_i rndccmd 10.53.0.9 flush 2>&1 | sed 's/^/ns3 /' | cat_i sleep 1 echo_i "rechecking spoofed response scenarios with forward only zones" run_spooftests # # This scenario expects the spoofed response to succeed. The tests are # similar to the ones above, but not identical. # echo_i "rechecking spoofed response scenarios with 'forward only' set globally" copy_setports ns9/named3.conf.in ns9/named.conf rndccmd 10.53.0.9 reconfig 2>&1 | sed 's/^/ns3 /' | cat_i rndccmd 10.53.0.9 flush 2>&1 | sed 's/^/ns3 /' | cat_i sleep 1 n=$((n+1)) echo_i "checking spoofed response scenario 1 - out of bailiwick NS ($n)" ret=0 # prime dig_with_opts @10.53.0.9 attackSecureDomain.net > dig.out.$n.prime || ret=1 # check 'net' is poisoned. dig_with_opts @10.53.0.9 diditwork.net. TXT > dig.out.$n.net || ret=1 grep '^didItWork\.net\..*TXT.*"if you can see this record the attack worked"' dig.out.$n.net > /dev/null || ret=1 # check 'sub.local.net' is poisoned. dig_with_opts @10.53.0.9 sub.local.net TXT > dig.out.$n.sub || ret=1 grep '^sub\.local\.net\..*TXT.*"if you see this attacker overrode local delegation"' dig.out.$n.sub > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) n=$((n+1)) echo_i "checking spoofed response scenario 2 - inject DNAME/net2. ($n)" ret=0 # prime dig_with_opts @10.53.0.9 attackSecureDomain.net2 > dig.out.$n.prime || ret=1 # check that net2/DNAME is cached dig_with_opts @10.53.0.9 net2. DNAME > dig.out.$n.net2 || ret=1 grep "ANSWER: 1," dig.out.$n.net2 > /dev/null || ret=1 grep "net2\..*IN.DNAME.net\.example\.lll\." dig.out.$n.net2 > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) # # This test doesn't use any forwarder clauses but is here because it # is similar to forwarders, as the set of servers that can populate # the namespace is defined by the zone content. # echo_i "rechecking spoofed response scenarios glue below local zone" copy_setports ns9/named4.conf.in ns9/named.conf rndccmd 10.53.0.9 reconfig 2>&1 | sed 's/^/ns3 /' | cat_i rndccmd 10.53.0.9 flush 2>&1 | sed 's/^/ns3 /' | cat_i sleep 1 n=$((n+1)) echo_i "checking sibling glue below zone ($n)" ret=0 # prime dig_with_opts @10.53.0.9 sibling.tld > dig.out.$n.prime || ret=1 # check for glue A record for sub.local.tld is not used dig_with_opts @10.53.0.9 sub.local.tld TXT > dig.out.$n.sub || ret=1 grep "ANSWER: 1," dig.out.$n.sub > /dev/null || ret=1 grep 'sub\.local\.tld\..*IN.TXT."good"$' dig.out.$n.sub > /dev/null || ret=1 if [ $ret != 0 ]; then echo_i "failed"; fi status=$((status+ret)) echo_i "exit status: $status" [ $status -eq 0 ] || exit 1