.mm (Myanmar) TLD DNSSEC Outage: 2018-11-05

Updated: November 8, 2018

Overview

This page gives some details on the .mm (Myanmar) DNSSEC outage on November 5, 2018.

Timeline / DNSViz

DNSSEC Debugger

Unlike DNSViz, Verisign's DNSSEC Debugger doesn't archive results, so here's a screenshot of my web browser's output from November 5, 2018:

November 5, 2018 .mm DNSSEC outage

Google Public 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. With DNSSEC, DNS queries result in SERVFAIL:

$ dig +dnssec ns mm. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> +dnssec ns mm. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 49132
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

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

;; Query time: 422 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Nov 5 05:37:31 2018
;; MSG SIZE rcvd: 31


You have to disable DNSSEC to make DNS queries work:

$ dig +cd ns mm. @8.8.8.8

; <<>> DiG 9.4.2-P2 <<>> +cd ns mm. @8.8.8.8
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31009
;; flags: qr rd ra cd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mm. IN NS

;; ANSWER SECTION:
mm. 3599 IN NS ns2.nic.net.mm.
mm. 3599 IN NS ns1.nic.net.mm.
mm. 3599 IN NS ns0.nic.net.mm.
mm. 3599 IN NS mm.cctld.authdns.ripe.net.

;; Query time: 205 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Nov 5 05:37:32 2018
;; MSG SIZE rcvd: 121

Zonemaster

zonemaster.net archived this DNSSEC outage, noting "The apex DNSKEY RRset was not correctly signed."

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: mm.
[B] mm. 3600 IN DNSKEY 257 3 8 ;{id = 10294 (ksk), size = 4096b}
mm. 3600 IN DNSKEY 256 3 8 ;{id = 32901 (zsk), size = 1024b}
mm. 3600 IN DNSKEY 257 3 8 ;{id = 14581 (ksk), size = 2048b}
mm. 3600 IN DNSKEY 256 3 8 ;{id = 25968 (zsk), size = 4096b}
[B] Error verifying denial of existence for mm. type A: No keys with the keytag and algorithm from the RRSIG found
;;[S] self sig OK; [B] bogus; [T] trusted

Logfile examples