diff options
Diffstat (limited to 'modules/rebinding')
| -rw-r--r-- | modules/rebinding/README.rst | 25 | ||||
| -rw-r--r-- | modules/rebinding/rebinding.lua | 112 | ||||
| -rw-r--r-- | modules/rebinding/rebinding.mk | 2 | ||||
| -rw-r--r-- | modules/rebinding/test.integr/deckard.yaml | 12 | ||||
| -rw-r--r-- | modules/rebinding/test.integr/kresd_config.j2 | 49 | ||||
| -rw-r--r-- | modules/rebinding/test.integr/module_rebinding.rpl | 833 |
6 files changed, 1033 insertions, 0 deletions
diff --git a/modules/rebinding/README.rst b/modules/rebinding/README.rst new file mode 100644 index 0000000..26432e6 --- /dev/null +++ b/modules/rebinding/README.rst @@ -0,0 +1,25 @@ +.. _mod-rebinding: + +Rebinding protection +-------------------- + +This module provides protection from `DNS Rebinding attack`_ by blocking +answers which cointain IPv4_ or IPv6_ addresses for private use +(or some other special-use addresses). + +To enable this module insert following line into your configuration file: + +.. code-block:: lua + + modules.load('rebinding < iterate') + +Please note that this module does not offer stable configuration interface +yet. For this reason it is suitable mainly for public resolver operators +who do not need to whitelist certain subnets. + +.. warning:: Some like to "misuse" such addresses, e.g. `127.*.*.*` + in blacklists served over DNS, and this module will block such uses. + +.. _`DNS Rebinding attack`: https://en.wikipedia.org/wiki/DNS_rebinding +.. _IPv4: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml +.. _IPv6: https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml diff --git a/modules/rebinding/rebinding.lua b/modules/rebinding/rebinding.lua new file mode 100644 index 0000000..dc90d20 --- /dev/null +++ b/modules/rebinding/rebinding.lua @@ -0,0 +1,112 @@ +-- Protection from DNS rebinding attacks +local kres = require('kres') +local renumber = require('renumber') + +local M = {} +M.layer = {} +M.blacklist = { + -- https://www.iana.org/assignments/iana-ipv4-special-registry + -- + IPv4-to-IPv6 mapping + renumber.prefix('0.0.0.0/8', '0.0.0.0'), + renumber.prefix('::ffff:0.0.0.0/104', '::'), + renumber.prefix('10.0.0.0/8', '0.0.0.0'), + renumber.prefix('::ffff:10.0.0.0/104', '::'), + renumber.prefix('100.64.0.0/10', '0.0.0.0'), + renumber.prefix('::ffff:100.64.0.0/106', '::'), + renumber.prefix('127.0.0.0/8', '0.0.0.0'), + renumber.prefix('::ffff:127.0.0.0/104', '::'), + renumber.prefix('169.254.0.0/16', '0.0.0.0'), + renumber.prefix('::ffff:169.254.0.0/112', '::'), + renumber.prefix('172.16.0.0/12', '0.0.0.0'), + renumber.prefix('::ffff:172.16.0.0/108', '::'), + renumber.prefix('192.168.0.0/16', '0.0.0.0'), + renumber.prefix('::ffff:192.168.0.0/112', '::'), + -- https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml + renumber.prefix('::/128', '::'), + renumber.prefix('::1/128', '::'), + renumber.prefix('fc00::/7', '::'), + renumber.prefix('fe80::/10', '::'), +} -- second parameter for renumber module is ignored except for being v4 or v6 + +local function is_rr_blacklisted(rr) + for i = 1, #M.blacklist do + local prefix = M.blacklist[i] + -- Match record type to address family and record address to given subnet + if renumber.match_subnet(prefix[1], prefix[2], prefix[4], rr) then + return true + end + end + return false +end + +local function check_section(pkt, section) + local records = pkt:section(section) + local count = #records + if count == 0 then + return nil end + for i = 1, count do + local rr = records[i] + if rr.type == kres.type.A or rr.type == kres.type.AAAA then + local result = is_rr_blacklisted(rr) + if result then + return rr end + end + end +end + +local function check_pkt(pkt) + for _, section in ipairs({kres.section.ANSWER, + kres.section.AUTHORITY, + kres.section.ADDITIONAL}) do + local bad_rr = check_section(pkt, section) + if bad_rr then + return bad_rr + end + end +end + +local function refuse(req) + -- we are deleting packet in consume() phase so other modules + -- might have chosen some RRs from the original packet already + req.answ_selected.len = 0 + req.auth_selected.len = 0 + req.add_selected.len = 0 + + -- construct brand new answer packet + local pkt = req.answer + pkt:clear_payload() + pkt:rcode(kres.rcode.REFUSED) + pkt:ad(false) + pkt:aa(false) + pkt:begin(kres.section.ADDITIONAL) + + local msg = 'blocked by DNS rebinding protection' + pkt:put('\11explanation\7invalid\0', 10800, pkt:qclass(), kres.type.TXT, + string.char(#msg) .. msg) +end + +-- act on DNS queries which were not answered from cache +function M.layer.consume(state, req, pkt) + if state == kres.FAIL then + return state end + + req = kres.request_t(req) + local qry = req:current() + if qry.flags.CACHED then -- do not slow down cached queries + return state end + + pkt = kres.pkt_t(pkt) + local bad_rr = check_pkt(pkt) + if not bad_rr then + return state end + + qry.flags.RESOLVED = 1 -- stop iteration + qry.flags.CACHED = 1 -- do not cache + refuse(req) + log('[' .. string.format('%5d', qry.id) .. '][rebinding] ' + .. 'blocking blacklisted IP \'' .. kres.rr2str(bad_rr) + .. '\' received from IP ' .. tostring(kres.sockaddr_t(req.upstream.addr))) + return kres.FAIL +end + +return M diff --git a/modules/rebinding/rebinding.mk b/modules/rebinding/rebinding.mk new file mode 100644 index 0000000..560d910 --- /dev/null +++ b/modules/rebinding/rebinding.mk @@ -0,0 +1,2 @@ +rebinding_SOURCES := rebinding.lua +$(call make_lua_module,rebinding) diff --git a/modules/rebinding/test.integr/deckard.yaml b/modules/rebinding/test.integr/deckard.yaml new file mode 100644 index 0000000..58a2cee --- /dev/null +++ b/modules/rebinding/test.integr/deckard.yaml @@ -0,0 +1,12 @@ +programs: +- name: kresd + binary: kresd + additional: + - -f + - "1" + templates: + - modules/rebinding/test.integr/kresd_config.j2 + - tests/hints_zone.j2 + configs: + - config + - hints diff --git a/modules/rebinding/test.integr/kresd_config.j2 b/modules/rebinding/test.integr/kresd_config.j2 new file mode 100644 index 0000000..742f8d3 --- /dev/null +++ b/modules/rebinding/test.integr/kresd_config.j2 @@ -0,0 +1,49 @@ +{% raw %} +-- Disable RFC8145 signaling, scenario doesn't provide expected answers +if ta_signal_query then + modules.unload('ta_signal_query') +end + +-- Disable RFC8109 priming, scenario doesn't provide expected answers +if priming then + modules.unload('priming') +end + +-- Disable this module because it make one priming query +if detect_time_skew then + modules.unload('detect_time_skew') +end + +modules.load('rebinding < iterate') + +_hint_root_file('hints') +cache.size = 2*MB +verbose(true) +{% endraw %} + +net = { '{{SELF_ADDR}}' } + + +{% if QMIN == "false" %} +option('NO_MINIMIZE', true) +{% else %} +option('NO_MINIMIZE', false) +{% endif %} + + +-- Self-checks on globals +assert(help() ~= nil) +assert(worker.id ~= nil) +-- Self-checks on facilities +assert(cache.count() == 0) +assert(cache.stats() ~= nil) +assert(cache.backends() ~= nil) +assert(worker.stats() ~= nil) +assert(net.interfaces() ~= nil) +-- Self-checks on loaded stuff +assert(net.list()['{{SELF_ADDR}}']) +assert(#modules.list() > 0) +-- Self-check timers +ev = event.recurrent(1 * sec, function (ev) return 1 end) +event.cancel(ev) +ev = event.after(0, function (ev) return 1 end) diff --git a/modules/rebinding/test.integr/module_rebinding.rpl b/modules/rebinding/test.integr/module_rebinding.rpl new file mode 100644 index 0000000..bfaf273 --- /dev/null +++ b/modules/rebinding/test.integr/module_rebinding.rpl @@ -0,0 +1,833 @@ +; config options +; target-fetch-policy: "0 0 0 0 0" +; module-config: "iterator" +; name: "." + stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET. +CONFIG_END + +SCENARIO_BEGIN Test protection from DNS rebinding + +; K.ROOT-SERVERS.NET. +RANGE_BEGIN 0 1000 + ADDRESS 193.0.14.129 +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +. IN NS +SECTION ANSWER +. IN NS K.ROOT-SERVERS.NET. +SECTION ADDITIONAL +K.ROOT-SERVERS.NET. IN A 193.0.14.129 +ENTRY_END + +; net. +ENTRY_BEGIN +MATCH opcode qname +ADJUST copy_id copy_query +REPLY QR NOERROR +SECTION QUESTION +net. IN NS +SECTION AUTHORITY +. IN SOA . . 0 0 0 0 0 +ENTRY_END + +; root-servers.net. +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +root-servers.net. IN NS +SECTION ANSWER +root-servers.net. IN NS k.root-servers.net. +SECTION ADDITIONAL +k.root-servers.net. IN A 193.0.14.129 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qname +ADJUST copy_id copy_query +REPLY QR NOERROR +SECTION QUESTION +root-servers.net. IN A +SECTION AUTHORITY +root-servers.net. IN SOA . . 0 0 0 0 0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +k.root-servers.net. IN A +SECTION ANSWER +k.root-servers.net. IN A 193.0.14.129 +SECTION ADDITIONAL +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +k.root-servers.net. IN AAAA +SECTION AUTHORITY +root-servers.net. IN SOA . . 0 0 0 0 0 +ENTRY_END + +; gtld-servers.net. +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +gtld-servers.net. IN NS +SECTION ANSWER +gtld-servers.net. IN NS a.gtld-servers.net. +SECTION ADDITIONAL +a.gtld-servers.net. IN A 192.5.6.30 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qname +ADJUST copy_id copy_query +REPLY QR NOERROR +SECTION QUESTION +gtld-servers.net. IN A +SECTION AUTHORITY +gtld-servers.net. IN SOA . . 0 0 0 0 0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +a.gtld-servers.net. IN A +SECTION ANSWER +a.gtld-servers.net. IN A 192.5.6.30 +SECTION ADDITIONAL +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +a.gtld-servers.net. IN AAAA +SECTION AUTHORITY +gtld-servers.net. IN SOA . . 0 0 0 0 0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode subdomain +ADJUST copy_id copy_query +REPLY QR NOERROR +SECTION QUESTION +com. IN A +SECTION AUTHORITY +com. IN NS a.gtld-servers.net. +SECTION ADDITIONAL +a.gtld-servers.net. IN A 192.5.6.30 +ENTRY_END +RANGE_END + +; a.gtld-servers.net. +RANGE_BEGIN 0 1000 + ADDRESS 192.5.6.30 +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +com. IN NS +SECTION ANSWER +com. IN NS a.gtld-servers.net. +SECTION ADDITIONAL +a.gtld-servers.net. IN A 192.5.6.30 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode subdomain +ADJUST copy_id copy_query +REPLY QR NOERROR +SECTION QUESTION +example.com. IN A +SECTION AUTHORITY +example.com. IN NS ns.example.com. +SECTION ADDITIONAL +ns.example.com. IN A 1.2.3.4 +ENTRY_END + +; NS with address pointing into a private range must not be followed +ENTRY_BEGIN +MATCH opcode subdomain +ADJUST copy_id copy_query +REPLY QR NOERROR +SECTION QUESTION +attacker.com. IN A +SECTION AUTHORITY +attacker.com. IN NS ns.attacker.com. +SECTION ADDITIONAL +ns.attacker.com. IN A 192.168.3.5 +ENTRY_END +RANGE_END + +; ns.attacker.com. +RANGE_BEGIN 0 1000 + ADDRESS 19.168.3.5 +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attacker.com. IN NS +SECTION ANSWER +attacker.com. IN NS ns.attacker.com. +SECTION ADDITIONAL +ns.attacker.com. IN A 192.168.3.5 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +www.attacker.com. IN A +SECTION ANSWER +www.attacker.com. IN A 192.0.2.55 +ENTRY_END +RANGE_END + + +; ns.example.com. +RANGE_BEGIN 0 1000 + ADDRESS 1.2.3.4 +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +example.com. IN NS +SECTION ANSWER +example.com. IN NS ns.example.com. +SECTION ADDITIONAL +ns.example.com. IN A 1.2.3.4 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +www.example.com. IN A +SECTION ANSWER +www.example.com. IN A 192.0.2.40 +ENTRY_END + +; blacklisted IP addresses +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-0-0-0-0.example.com. IN A +SECTION ANSWER +attack-ipv4-0-0-0-0.example.com. IN A 0.0.0.0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-0-0-0-0.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-0-0-0-0.example.com. IN AAAA ::ffff:0.0.0.0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-10-1-2-3.example.com. IN A +SECTION ANSWER +attack-ipv4-10-1-2-3.example.com. IN A 10.1.2.3 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-10-2-3-4.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-10-2-3-4.example.com. IN AAAA ::ffff:10.2.3.4 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-100-127-255-254.example.com. IN A +SECTION ANSWER +attack-ipv4-100-127-255-254.example.com. IN A 100.127.255.254 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-100-127-255-255.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-100-127-255-255.example.com. IN AAAA ::ffff:100.127.255.255 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-127-0-0-1.example.com. IN A +SECTION ANSWER +attack-ipv4-127-0-0-1.example.com. IN A 127.0.0.1 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-127-0-0-1.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-127-0-0-1.example.com. IN AAAA ::ffff:127.0.0.1 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-169-254-255-255.example.com. IN A +SECTION ANSWER +attack-ipv4-169-254-255-255.example.com. IN A 169.254.255.255 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-169-254-0-0.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-169-254-0-0.example.com. IN AAAA ::ffff:169.254.0.0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-172-16-0-0.example.com. IN A +SECTION ANSWER +attack-ipv4-172-16-0-0.example.com. IN A 172.16.0.0 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-172-31-255-255.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-172-31-255-255.example.com. IN AAAA ::ffff:172.31.255.255 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4-192-168-3-8.example.com. IN A +SECTION ANSWER +attack-ipv4-192-168-3-8.example.com. IN A 192.168.3.8 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv4over6-192-168-254-210.example.com. IN AAAA +SECTION ANSWER +attack-ipv4over6-192-168-254-210.example.com. IN AAAA ::ffff:192.168.254.210 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv6-.example.com. IN AAAA +SECTION ANSWER +attack-ipv6-.example.com. IN AAAA :: +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv6-1.example.com. IN AAAA +SECTION ANSWER +attack-ipv6-1.example.com. IN AAAA ::1 +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv6-fc00.example.com. IN AAAA +SECTION ANSWER +attack-ipv6-fc00.example.com. IN AAAA fc00:: +ENTRY_END + +ENTRY_BEGIN +MATCH opcode qtype qname +ADJUST copy_id +REPLY QR NOERROR +SECTION QUESTION +attack-ipv6-fe80.example.com. IN AAAA +SECTION ANSWER +attack-ipv6-fe80.example.com. IN AAAA fe80:: +ENTRY_END + +RANGE_END + +STEP 11 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +www.example.com. IN A +ENTRY_END + +; recursion happens here, no blacklisted IP address is present +STEP 12 CHECK_ANSWER +ENTRY_BEGIN +MATCH all +REPLY QR RD RA NOERROR +SECTION QUESTION +www.example.com. IN A +SECTION ANSWER +www.example.com. IN A 192.0.2.40 +;SECTION AUTHORITY +;example.com. IN NS ns.example.com. +;SECTION ADDITIONAL +;ns.example.com. IN A 1.2.3.4 +ENTRY_END + +; test that 0.0.0.0 is blacklisted +STEP 201 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-0-0-0-0.example.com. IN A +ENTRY_END + +STEP 202 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-0-0-0-0.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:0.0.0.0 is blacklisted +STEP 211 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-0-0-0-0.example.com. IN AAAA +ENTRY_END + +STEP 212 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-0-0-0-0.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that 10.1.2.3 is blacklisted +STEP 221 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-10-1-2-3.example.com. IN A +ENTRY_END + +STEP 222 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-10-1-2-3.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:10.2.3.4 is blacklisted +STEP 231 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-10-2-3-4.example.com. IN AAAA +ENTRY_END + +STEP 232 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-10-2-3-4.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that 100.127.255.254 is blacklisted +STEP 241 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-100-127-255-254.example.com. IN A +ENTRY_END + +STEP 242 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-100-127-255-254.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:100.127.255.255 is blacklisted +STEP 251 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-100-127-255-255.example.com. IN AAAA +ENTRY_END + +STEP 252 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-100-127-255-255.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that 127.0.0.1 is blacklisted +STEP 261 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-127-0-0-1.example.com. IN A +ENTRY_END + +STEP 262 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-127-0-0-1.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:127.0.0.1 is blacklisted +STEP 271 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-127-0-0-1.example.com. IN AAAA +ENTRY_END + +STEP 272 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-127-0-0-1.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that 169.254.255.255 is blacklisted +STEP 281 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-169-254-255-255.example.com. IN A +ENTRY_END + +STEP 282 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-169-254-255-255.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:169.254.0.0 is blacklisted +STEP 291 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-169-254-0-0.example.com. IN AAAA +ENTRY_END + +STEP 292 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-169-254-0-0.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that 172.16.0.0 is blacklisted +STEP 301 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-172-16-0-0.example.com. IN A +ENTRY_END + +STEP 302 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-172-16-0-0.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:172.31.255.255 is blacklisted +STEP 311 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-172-31-255-255.example.com. IN AAAA +ENTRY_END + +STEP 312 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-172-31-255-255.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that 192.168.3.8 is blacklisted +STEP 321 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4-192-168-3-8.example.com. IN A +ENTRY_END + +STEP 322 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4-192-168-3-8.example.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::ffff:192.168.254.210 is blacklisted +STEP 331 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv4over6-192-168-254-210.example.com. IN AAAA +ENTRY_END + +STEP 332 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv4over6-192-168-254-210.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that :: is blacklisted +STEP 341 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv6-.example.com. IN AAAA +ENTRY_END + +STEP 342 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv6-.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that ::1 is blacklisted +STEP 351 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv6-1.example.com. IN AAAA +ENTRY_END + +STEP 352 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv6-1.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that fc00:: is blacklisted +STEP 361 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv6-fc00.example.com. IN AAAA +ENTRY_END + +STEP 362 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv6-fc00.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +; test that fe80:: is blacklisted +STEP 371 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +attack-ipv6-fe80.example.com. IN AAAA +ENTRY_END + +STEP 372 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +attack-ipv6-fe80.example.com. IN AAAA +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +STEP 401 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +www.example.com. IN A +ENTRY_END + +; it still works if no blacklisted IP address is present +STEP 402 CHECK_ANSWER +ENTRY_BEGIN +MATCH all +REPLY QR RD RA NOERROR +SECTION QUESTION +www.example.com. IN A +SECTION ANSWER +www.example.com. IN A 192.0.2.40 +ENTRY_END + +STEP 501 QUERY +ENTRY_BEGIN +REPLY RD +SECTION QUESTION +www.attacker.com. IN A +ENTRY_END + +; NS for attacker.com. has IP address from private range, it must fail +STEP 502 CHECK_ANSWER +ENTRY_BEGIN +MATCH all answer authority +REPLY QR RD RA REFUSED +SECTION QUESTION +www.attacker.com. IN A +SECTION ANSWER +SECTION AUTHORITY +SECTION ADDITIONAL +explanation.invalid. TXT "blocked by DNS rebinding protection" +ENTRY_END + +SCENARIO_END |