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CNAMEs return A record when original query is for AAAA; #1464

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speedst3r opened this issue Jan 24, 2025 · 0 comments
Open

CNAMEs return A record when original query is for AAAA; #1464

speedst3r opened this issue Jan 24, 2025 · 0 comments
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bug Something isn't working

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@speedst3r
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speedst3r commented Jan 24, 2025 •
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Describe the bug
When querying a hostname (in a hosted zone) with type AAAA, if the response is a CNAME then the second response returns an A record instead of AAAA.

To Reproduce
Steps to reproduce the behavior:

  1. Setup hostname with A and AAAA results; setup CNAME to that hostname
  2. Query record that returns a CNAME with type AAAA
  3. Response is an A record, not AAAA
  4. Querying record with type A returns A record
  5. Querying the target record of the CNAME returns the correct record type for the query

Expected behavior
Second response to a query returning a CNAME should return the record type of the original query

Screenshots
Querying Gravity

$ dig @192.168.0.252 www.example.com

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 www.example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10157
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;www.example.com.              IN      A

;; ANSWER SECTION:
www.example.com.       0       IN      CNAME   example.com.
example.com.           0       IN      A       192.168.0.238

;; Query time: 0 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:38 AWST 2025
;; MSG SIZE  rcvd: 115

$ dig @192.168.0.252 www.example.com a

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 www.example.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46385
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;www.example.com.              IN      A

;; ANSWER SECTION:
www.example.com.       0       IN      CNAME   example.com.
example.com.           0       IN      A       192.168.0.238

;; Query time: 0 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:41 AWST 2025
;; MSG SIZE  rcvd: 115

$ dig @192.168.0.252 www.example.com aaaa

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 www.example.com aaaa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12548
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;www.example.com.              IN      AAAA

;; ANSWER SECTION:
www.example.com.       0       IN      CNAME   example.com.
example.com.           0       IN      A       192.168.0.238

;; Query time: 0 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:43 AWST 2025
;; MSG SIZE  rcvd: 115

$ dig @192.168.0.252 example.com

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43914
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;example.com.                  IN      A

;; ANSWER SECTION:
example.com.           0       IN      A       192.168.0.238

;; Query time: 1 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:48 AWST 2025
;; MSG SIZE  rcvd: 69

$ dig @192.168.0.252 example.com a

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 example.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41909
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;example.com.                  IN      A

;; ANSWER SECTION:
example.com.           0       IN      A       192.168.0.238

;; Query time: 1 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:50 AWST 2025
;; MSG SIZE  rcvd: 69

$ dig @192.168.0.252 example.com aaaa

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> @192.168.0.252 example.com aaaa
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62397
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;example.com.                  IN      AAAA

;; ANSWER SECTION:
example.com.           0       IN      AAAA    2400:aaaa:bbbb:cccc:dddd:eeee::0

;; Query time: 1 msec
;; SERVER: 192.168.0.252#53(192.168.0.252) (UDP)
;; WHEN: Fri Jan 24 09:00:52 AWST 2025
;; MSG SIZE  rcvd: 81

Querying DNSmasq:

$ dig www.example.com a

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> www.example.com a
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45239
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;www.example.com.              IN      A

;; ANSWER SECTION:
www.example.com.       0       IN      CNAME   example.com.
example.com.           0       IN      A       192.168.0.238

;; Query time: 1 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Fri Jan 24 09:04:41 AWST 2025
;; MSG SIZE  rcvd: 75

$ dig www.example.com aaaa

; <<>> DiG 9.18.30-0ubuntu0.24.04.1-Ubuntu <<>> www.example.com aaaa
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2309
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;www.example.com.              IN      AAAA

;; ANSWER SECTION:
www.example.com.       0       IN      CNAME   example.com.
example.com.           0       IN      AAAA    2400:aaaa:bbbb:cccc:dddd:eeee::0

;; Query time: 1 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Fri Jan 24 09:04:43 AWST 2025
;; MSG SIZE  rcvd: 87

Logs
Output of docker-compose logs or kubectl logs respectively

Version and Deployment (please complete the following information):

  • Gravity version: 0.26.1
  • Deployment: kubernetes statefulset, external etcd

Additional context
@speedst3r speedst3r added the bug Something isn't working label Jan 24, 2025
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