lequipe.fr DNSSEC Outage: 2021-06-22

Date: June 22, 2021

Overview

This page gives some details on the lequipe.fr DNSSEC outage on June 22, 2021. The signatures had an invalid inception date far in the future, sort of a friend of expired RRSIGs. The DNSKEY wasn't valid until July 7, see the timeline below. L'Équipe is the biggest newspaper in France.

Timeline / DNSViz

Here's a screenshot since DNSViz regularly loses its archives:

June 22, 2021 leqipe.fr DNSSEC outage

DNSSEC Debugger

Unlike DNSViz, Verisign's DNSSEC Debugger doesn't archive results, so here's a screenshot of my web browser's output from June 22, 2021:

June 22, 2021 lequipe.fr DNSSEC outage

Google DNS: with and without DNSSEC

DNSSEC can be disabled in queries via the CD (checking disabled) bit. Let's compare DNS queries with and without DNSSEC.

$ dig +dnssec ns lequipe.fr. @8.8.8.8.

; <<>> dig 9.10.8-P1 <<>> +dnssec ns lequipe.fr. @8.8.8.8.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 10377
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 512
;; QUESTION SECTION:
;lequipe.fr. IN NS

;; Query time: 14 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Jun 22 00:23:32 UTC 2021
;; MSG SIZE rcvd: 39

You have to disable DNSSEC to make DNS queries work:

$ dig +cd ns lequipe.fr. @8.8.8.8.

; <<>> dig 9.10.8-P1 <<>> +cd ns lequipe.fr. @8.8.8.8.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33797
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;lequipe.fr. IN NS

;; ANSWER SECTION:
lequipe.fr. 3599 IN NS ns4.perf1.de.
lequipe.fr. 3599 IN NS ns3.perf1.eu.
lequipe.fr. 3599 IN NS ns1.perf1.com.
lequipe.fr. 3599 IN NS ns5.perf1.asia.
lequipe.fr. 3599 IN NS ns2.perf1.fr.

;; Query time: 15 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Jun 22 00:23:32 UTC 2021
;; MSG SIZE rcvd: 170

Zonemaster

dns.google.com

dns.google.com saw this outage. See the historical view courtesy of archive.is. Here's a screenshot:

dns.google.com view of June 22, 2021 lequipe.fr DNSSEC outage

drill trace

Since DNSSEC contains so much garbage, I put the complete drill trace into its own file, with the relevant portion below (emphasis added):

;; Domain: lequipe.fr.
[B] lequipe.fr. 3600 IN DNSKEY 256 3 8 ;{id = 9525 (zsk), size = 1024b}
lequipe.fr. 3600 IN DNSKEY 256 3 8 ;{id = 55003 (zsk), size = 1024b}
lequipe.fr. 3600 IN DNSKEY 257 3 8 ;{id = 52024 (ksk), size = 2048b}
[B] lequipe.fr. 3600 IN A 35.186.248.227
;; Error: No keys with the keytag and algorithm from the RRSIG found
;;[S] self sig OK; [B] bogus; [T] trusted

Logfile examples