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DNSTake - A Fast Tool To Check Missing Hosted DNS Zones That Can Lead To Subdomain Takeover


A fast tool to check missing hosted DNS zones that can lead to subdomain takeover.


What is a DNS takeover?

DNS takeover vulnerabilities occur when a subdomain (subdomain.example.com) or domain has its authoritative nameserver set to a provider (e.g. AWS Route 53, Akamai, Microsoft Azure, etc.) but the hosted zone has been removed or deleted. Consequently, when making a request for DNS records the server responds with a SERVFAIL error. This allo ws an attacker to create the missing hosted zone on the service that was being used and thus control all DNS records for that (sub)domain.¹


Installation

from Binary

The ez way! You can download a pre-built binary from releases page, just unpack and run!


from Source
NOTE: Go 1.16+ compiler should be installed & configured!

Very quick & clean!

▶ go install github.com/pwnesia/dnstake/cmd/[email protected]

— or

Manual building executable from source code:

▶ git clone https://github.com/pwnesia/dnstake▶ cd dnstake/cmd/dnstake▶ go build .▶ (sudo) mv dnstake /usr/local/bin

Usage
$ dnstake -h  ·▄▄▄▄   ▐ ▄ .▄▄ ·▄▄▄▄▄ ▄▄▄· ▄ •▄ ▄▄▄ .  ██▪ ██ •█▌▐█▐█ ▀.•██  ▐█ ▀█ █▌▄▌▪▀▄.▀·  ▐█· ▐█▌▐█▐▐▌▄▀▀▀█▄▐█.▪▄█▀▀█ ▐▀▀▄·▐▀▀▪▄  ██. ██ ██▐█▌▐█▄▪▐█▐█▌·▐█ ▪▐▌▐█.█▌▐█▄▄▌  ▀▀▀▀▀• ▀&#9600   ; █▪ ▀▀▀▀ ▀▀▀  ▀  ▀ ·▀  ▀ ▀▀▀        (c) pwnesia.org — v0.0.1Usage:  [stdin] | dnstake [options]  dnstake -t HOSTNAME [options]Options:  -t, --target <HOST/FILE>    Define single target host/list to check  -c, --concurrent <i>        Set the concurrency level (default: 25)  -s, --silent                Suppress errors and/or clean output  -h, --help                  Display its helpExamples:  dnstake -t (sub.)domain.tld  dnstake -t hosts.txt  cat hosts.txt | dnstake  subfinder -silent -d domain.tld | dnstake

Workflow

DNSTake use RetryableDNS client library to send DNS queries. Initial engagement using Google & Cloudflare DNS as the resolver, then check & fingerprinting the nameservers of target host — if there is one, it will resolving the target host again with its nameserver IPs as resolver, if it gets weird DNS status response (other than NOERROR/NXDOMAIN), then it's vulnerable to be taken over. More or less like this in form of a diagram.

Currently supported DNS providers, see here.


References

License

DNSTake is distributed under MIT. See LICENSE.



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