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Release v2.7.1 (#397)
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varunsh-coder committed Apr 29, 2024
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17 changes: 6 additions & 11 deletions README.md
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Harden-Runner provides network egress filtering and runtime security for GitHub-hosted and self-hosted runners.

For self-hosted environments, Harden-Runner supports:
Learn how Harden-Runner works through the video below, which shows how it detected a supply chain attack on a Google open-source project.

1. Kubernetes runners setup using Actions Runner Controller (ARC)
2. Virtual Machine runners (e.g. on EC2) - both ephemeral and persistent runners are supported
<a href="https://youtu.be/Yz72qAOrN9s" target="_blank"><img src="images/case-study-thumbnail1.png" alt="Harden-Runner detected supply chain attack in a Google open-source project" title="This case study video shows how StepSecurity Harden-Runner detected a CI/CD supply chain attack in real-time in Google’s open-source project Flank"></a>

![Harden Runner Demo](images/main.png)

## Explore open source projects using Harden-Runner
## 3,000+ open source projects use Harden-Runner

| [![CISA](https://avatars.githubusercontent.com/u/18539691?s=60&v=4)](https://app.stepsecurity.io/github/cisagov/skeleton-generic/actions/runs/7588528684) | [![Microsoft](https://avatars.githubusercontent.com/u/6154722?s=60&v=4)](https://app.stepsecurity.io/github/microsoft/ebpf-for-windows/actions/runs/7587031851) | [![Google](https://avatars.githubusercontent.com/u/2810941?s=60&v=4)](https://app.stepsecurity.io/github/GoogleCloudPlatform/functions-framework-ruby/actions/runs/7576989995) | [![DataDog](https://avatars.githubusercontent.com/u/365230?s=60&v=4)](https://app.stepsecurity.io/github/DataDog/stratus-red-team/actions/runs/7446169664) | [![Intel](https://avatars.githubusercontent.com/u/17888862?s=60&v=4)](https://app.stepsecurity.io/github/intel/cve-bin-tool/actions/runs/7590975903) | [![Kubernetes](https://avatars.githubusercontent.com/u/36015203?s=60&v=4)](https://app.stepsecurity.io/github/kubernetes-sigs/cluster-api-provider-azure/actions/runs/7591172950) | [![Node.js](https://avatars.githubusercontent.com/u/9950313?s=60&v=4)](https://app.stepsecurity.io/github/nodejs/node/actions/runs/7591405720) | [![AWS](https://avatars.githubusercontent.com/u/2232217?s=60&v=4)](https://app.stepsecurity.io/github/aws/aperf/actions/runs/7631366761) |
| --------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |
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| | Countermeasure | Prevent Security Breach |
| --- | ----------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1. | Monitor and block outbound network traffic at the DNS, HTTPS (Layer 7), and network layers (Layers 3 and 4) to prevent exfiltration of code and CI/CD credentials | To prevent the [Codecov breach](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md) scenario |
| 2. | Detect if source code is being tampered during the build process to inject a backdoor | To detect the [SolarWinds incident](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/TamperingDuringBuild.md) scenario |
| 2. | Detect if source code is being tampered during the build process to inject a backdoor | To detect the [XZ Utils](https://www.stepsecurity.io/blog/analysis-of-backdoored-xz-utils-build-process-with-harden-runner) and [SolarWinds incident](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/TamperingDuringBuild.md) scenario |
| 3. | Detect poisoned workflows and compromised dependencies | To detect [Dependency confusion](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md#dependency-confusion-attacks) and [Malicious dependencies](https://github.com/step-security/github-actions-goat/blob/main/docs/Vulnerabilities/ExfiltratingCICDSecrets.md#compromised-dependencies) |

Read this [case study](https://infosecwriteups.com/detecting-malware-packages-in-github-actions-7b93a9985635) on how Harden-Runner detected malicious packages in the NPM registry.

## How

### GitHub-Hosted Runners
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3. Click on the link ([example link](https://app.stepsecurity.io/github/step-security/github-actions-goat/actions/runs/7704454287)). You will see a process monitor view of network and file events correlated with each step of the job.

<p align="left">
<img src="images/network-events.png" alt="Insights from harden-runner" >
<img src="images/network-events1.png" alt="Insights from harden-runner" >
</p>

4. In the `Recommended Policy` tab, you'll find a recommended block policy based on outbound calls aggregated from the current and past runs of the job. You can update your workflow file with this policy, or alternatively, use the [Policy Store](https://docs.stepsecurity.io/harden-runner/how-tos/block-egress-traffic#2-add-the-policy-using-the-policy-store) to apply the policy without modifying the workflow file. From now on, any outbound calls not in the allowed list will be blocked.

<p align="left">
<img src="images/recommended-policy.png" alt="Policy recommended by harden-runner" >
<img src="images/recommended-policy1.png" alt="Policy recommended by harden-runner" >
</p>

## Hands-On Tutorials
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