- Unit test for CVE-2026-40622.

diff --git a/doc/Changelog b/doc/Changelog
index a16fab1ccf786d1a6e8933d2d07c061872d3d3a6..208ca24ad52046a0e1cce13b4e32e409b5e7f896 100644 (file)
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -33,6 +33,7 @@
        - Unit test for CVE-2026-33278.
        - Unit test for CVE-2026-42944.
        - Unit test for CVE-2026-42959.
+       - Unit test for CVE-2026-40622.
 
 18 May 2026: Wouter
        - Fix for mixed class referrals, the resolver uses the query

diff --git a/testdata/iter_ghost_ns_childapex.rpl b/testdata/iter_ghost_ns_childapex.rpl
new file mode 100644 (file)
index 0000000..2b046a8
--- /dev/null
+++ b/testdata/iter_ghost_ns_childapex.rpl
@@ -0,0 +1,299 @@
+; config options
+server:
+       target-fetch-policy: "0 0 0 0 0"
+       qname-minimisation: no
+       minimal-responses: yes
+       log-servfail: yes
+       module-config: "iterator"
+
+stub-zone:
+       name: "."
+       stub-addr: 193.0.14.129         # K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test for ghost domain with a child apex NS query.
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+       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
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+tld. IN NS
+SECTION AUTHORITY
+tld.   IN NS   ns.tld.
+SECTION ADDITIONAL
+ns.tld. IN A 1.2.3.5
+ENTRY_END
+RANGE_END
+
+; ns.tld
+RANGE_BEGIN 0 15
+       ADDRESS 1.2.3.5
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+tld. IN NS
+SECTION ANSWER
+tld.    IN NS   ns.tld
+SECTION ADDITIONAL
+ns.tld. IN A 1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.tld. IN A
+SECTION ANSWER
+ns.tld. IN A 1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.tld. IN AAAA
+SECTION AUTHORITY
+tld. 3600 IN SOA ns.tld. host.tld. 20201 3600 1800 604800 3600
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+mid.tld. IN NS
+SECTION AUTHORITY
+mid.tld.    5 IN NS   ns.mid.tld.
+SECTION ADDITIONAL
+ns.mid.tld. 5 IN A 1.2.3.4
+ENTRY_END
+RANGE_END
+
+; ns.tld
+RANGE_BEGIN 20 100
+       ADDRESS 1.2.3.5
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+tld. IN NS
+SECTION ANSWER
+tld.    IN NS   ns.tld
+SECTION ADDITIONAL
+ns.tld. IN A 1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.tld. IN A
+SECTION ANSWER
+ns.tld. IN A 1.2.3.5
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.tld. IN AAAA
+SECTION AUTHORITY
+tld. 3600 IN SOA ns.tld. host.tld. 20201 3600 1800 604800 3600
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR AA NXDOMAIN
+SECTION QUESTION
+mid.tld. IN NS
+SECTION AUTHORITY
+tld. 3600 IN SOA ns.tld. host.tld. 20201 3600 1800 604800 3600
+ENTRY_END
+RANGE_END
+
+; ns.mid.tld.
+RANGE_BEGIN 0 100
+       ADDRESS 1.2.3.4
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+mid.tld. IN NS
+SECTION ANSWER
+mid.tld. 86400 IN NS ns.mid.tld.
+SECTION ADDITIONAL
+ns.mid.tld. 86400 IN A 1.2.3.4
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.mid.tld. IN A
+SECTION ANSWER
+ns.mid.tld.         IN      A       1.2.3.4
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.mid.tld. IN AAAA
+SECTION AUTHORITY
+mid.tld. 3600 IN SOA ns.mid.tld. host.mid.tld. 20301 3600 1800 604800 3600
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode subdomain
+ADJUST copy_id copy_query
+REPLY QR NOERROR
+SECTION QUESTION
+sub.mid.tld. IN NS
+SECTION AUTHORITY
+sub.mid.tld. 3600 IN NS ns.sub.mid.tld.
+SECTION ADDITIONAL
+ns.sub.mid.tld. 3600 IN A 1.2.3.6
+ENTRY_END
+RANGE_END
+
+; ns.sub.mid.tld.
+RANGE_BEGIN 0 100
+       ADDRESS 1.2.3.6
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR NOERROR
+SECTION QUESTION
+sub.mid.tld. IN NS
+SECTION ANSWER
+sub.mid.tld.    IN NS   ns.sub.mid.tld.
+SECTION ADDITIONAL
+ns.sub.mid.tld.         IN      A       1.2.3.6
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.sub.mid.tld. IN A
+SECTION ANSWER
+ns.sub.mid.tld.         IN      A       1.2.3.6
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+ns.sub.mid.tld. IN AAAA
+SECTION AUTHORITY
+sub.mid.tld. 3600 IN SOA ns.sub.mid.tld. host.sub.mid.tld. 20301 3600 1800 604800 3600
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+a.sub.mid.tld. IN A
+SECTION ANSWER
+a.sub.mid.tld. 3600 IN A 10.20.30.40
+ENTRY_END
+
+ENTRY_BEGIN
+MATCH opcode qtype qname
+ADJUST copy_id
+REPLY QR AA NOERROR
+SECTION QUESTION
+b.sub.mid.tld. IN A
+SECTION ANSWER
+b.sub.mid.tld. 3600 IN A 10.20.30.41
+ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD NOERROR
+SECTION QUESTION
+a.sub.mid.tld. IN A
+ENTRY_END
+
+STEP 2 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+a.sub.mid.tld. IN A
+SECTION ANSWER
+a.sub.mid.tld. 3600 IN A 10.20.30.40
+ENTRY_END
+
+STEP 10 QUERY
+ENTRY_BEGIN
+REPLY RD NOERROR
+SECTION QUESTION
+mid.tld. IN NS
+ENTRY_END
+
+STEP 11 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+mid.tld. IN NS
+SECTION ANSWER
+mid.tld. 86400 IN NS ns.mid.tld.
+SECTION ADDITIONAL
+ns.mid.tld. 86400 IN A 1.2.3.4
+ENTRY_END
+
+STEP 20 TIME_PASSES ELAPSE 10
+; The authority for .tld switches to NXDOMAIN for mid.tld.
+
+STEP 30 QUERY
+ENTRY_BEGIN
+REPLY RD NOERROR
+SECTION QUESTION
+b.sub.mid.tld. IN A
+ENTRY_END
+
+STEP 31 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all
+REPLY QR RD RA NXDOMAIN
+SECTION QUESTION
+b.sub.mid.tld. IN A
+SECTION ANSWER
+SECTION AUTHORITY
+tld. 3600 IN SOA ns.tld. host.tld. 20201 3600 1800 604800 3600
+ENTRY_END
+
+SCENARIO_END