CDK is an open-sourced container penetration toolkit, offering stable exploitation in different slimmed containers without any OS dependency. It comes with penetration tools and many powerful PoCs/EXPs helps you to escape container and takeover K8s cluster easily.

CDK - Zero Dependency Container Penetration Toolkit

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Legal Disclaimer

Usage of CDK for attacking targets without prior mutual consent is illegal. CDK is for security testing purposes only.

Overview

CDK is an open-sourced container penetration toolkit, designed for offering stable exploitation in different slimmed containers without any OS dependency. It comes with useful net-tools and many powerful PoCs/EXPs helps you to escape container and takeover K8s cluster easily.

Currently still under development, submit issues or mail i@cdxy.me if you need any help.

Installation

Download latest release in: https://github.com/cdk-team/CDK/releases/

Drop executable files into target container and start testing.

Usage

Usage:
  cdk evaluate [--full]
  cdk run (--list | <exploit> [<args>...])
  cdk auto-escape <cmd>
  cdk <tool> [<args>...]

Evaluate:
  cdk evaluate                              Gather information to find weakness inside container.
  cdk evaluate --full                       Enable file scan during information gathering.

Exploit:
  cdk run --list                            List all available exploits.
  cdk run <exploit> [<args>...]             Run single exploit, docs in https://github.com/cdk-team/CDK/wiki

Auto Escape:
  cdk auto-escape <cmd>                     Escape container in different ways then let target execute <cmd>.

Tool:
  vi <file>                                 Edit files in container like "vi" command.
  ps                                        Show process information like "ps -ef" command.
  nc [options]                              Create TCP tunnel.
  ifconfig                                  Show network information.
  kcurl <path> (get|post) <uri> <data>      Make request to K8s api-server.
  ucurl (get|post) <socket> <uri> <data>    Make request to docker unix socket.
  probe <ip> <port> <parallel> <timeout-ms> TCP port scan, example: cdk probe 10.0.1.0-255 80,8080-9443 50 1000

Options:
  -h --help     Show this help msg.
  -v --version  Show version.

Features

CDK have three modules:

1. Evaluate: gather information inside container to find potential weakness.
2. Exploit: for container escaping, persistance and lateral movement
3. Tool: network-tools and APIs for TCP/HTTP requests, tunnels and K8s cluster management.

Evaluate Module

Usage

cdk evaluate [--full]

This command will run the scripts below without local file scanning, using --full to enable all.

Exploit Module

List all available exploits:

cdk run --list

Run targeted exploit:

cdk run <script-name> [options]

Tool Module

Running commands like in Linux, little different in input-args, see the usage link.

cdk nc [options]
cdk ps

Developer Docs

• run test in container.

Contributing to CDK

First off, thanks for taking the time to contribute!

By reporting any issue, ideas or PRs, your GitHub ID will be listed here.

• https://github.com/cdk-team/CDK/blob/main/thanks.md

Bug Reporting

Bugs are tracked as GitHub Issues. Create an issue with the current CDK version, error msg and the environment. Describe the exact steps which reproduce the problem.

Suggesting Enhancements

Enhancement suggestions are tracked as GitHub Discussions. You can publish any thoughts here to discuss with developers directly.

Pull Requests

Fix problems or maintain CDK’s quality:

• Describe the current CDK version, environment, problem and exact steps that reproduce the problem.
• Running screenshots or logs before and after you fix the problem.

New feature or exploits:

• Explain why this enhancement would be useful to other users.
• Please enable a sustainable environment for us to review contributions.
• Screenshots about how this new feature works.
• If you are committing a new evaluate/exploit scripts, please add a simple doc to your PR message, here is an example.

TODO

1. Echo loader for delivering CDK into target container via Web RCE.
2. EDR defense evasion.
3. Compile optimization.
4. Dev docs