Paragon Initiative Enterprises · Report #180393

Subdomain Takeover

N/Astatus

criticalseverity

83upvotes

5 May 2017disclosed

How it was found

Hello,

Your Subdomain engineering.github.com/paragonie is Pointing to Tumblr.com

You should immediately remove the DNS-entry for engineering.zomato.com is Pointing to Tumblr.com.. Any One Can Claim That Domain , Please Read The Advisory Below.

Remediation Please make sure you're always going through your DNS-entries so no subdomains are pointing to external services you do not use.

We've written an advisory about this at Detectify: http://blog.detectify.com/post/100600514143/hostile-subdomain-takeover-using-heroku-github-desk

Where you can read more about this sort of attack.

I Have Done NSLookup For POC :-

nslookup github.com/paragonie Server: 192.168.188.1 Address: 192.168.188.2#53

Non-authoritative answer: engineering.zomato.com canonical name = domains.tumblr.com. Name: domains.tumblr.com Address: 66.6.42.22 Name: domains.tumblr.com Address: 66.6.43.22

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original