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DNS resolution failing for Burp Collaborator FQDNs

Vladimir | Last updated: Apr 07, 2022 07:36AM UTC

Hello, i'm experiencing issues with the DNS resolution of Burp Collaborator FQDNs: > host wee9mi6974jyv6h5tayvi4tv8med22.burpcollaborator.net Host wee9mi6974jyv6h5tayvi4tv8med22.burpcollaborator.net not found: 2(SERVFAIL) The FQDN was obtained from Burp Collaborator, so it should be a valid one, but it cannot be resolved.

Vladimir | Last updated: Apr 07, 2022 07:54AM UTC

I think there is an issue with the burpcollaborator.net DNS zone: > dig @8.8.8.8 ns burpcollaborator.net ; <<>> DiG 9.10.6 <<>> @8.8.8.8 ns burpcollaborator.net ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34214 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;burpcollaborator.net. IN NS ;; ANSWER SECTION: burpcollaborator.net. 995 IN CNAME PublicInteractionNLB-3bddf5ff6abb91b6.elb.eu-west-1.amazonaws.com. ;; AUTHORITY SECTION: elb.eu-west-1.amazonaws.com. 60 IN SOA ns-1566.awsdns-03.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 60 ;; Query time: 36 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Thu Apr 07 10:51:55 EEST 2022 ;; MSG SIZE rcvd: 212 Presently, there is no NS record for the zone.

Hannah, PortSwigger Agent | Last updated: Apr 07, 2022 08:18AM UTC

Hi Could you tell me the version of Burp that you are currently using, please?

Vladimir | Last updated: Apr 07, 2022 11:03AM UTC

Hi, 2022.2.4 it is.

Hannah, PortSwigger Agent | Last updated: Apr 07, 2022 11:22AM UTC

Thanks for that information! Could you run a collaborator health check and let us know the output, please? You can find this under "Project options > Misc > Burp collaborator server". If you'd rather send us a screenshot, you can drop us an email at support@portswigger.net.

Vladimir | Last updated: Apr 07, 2022 12:56PM UTC

I have sent you the requested screen-shot via e-mail.

Hannah, PortSwigger Agent | Last updated: Apr 07, 2022 02:15PM UTC