Bump step-security/harden-runner from 2.15.1 to 2.19.1

[dependabot]

Bumps step-security/harden-runner from 2.15.1 to 2.19.1.

Release notes

Sourced from step-security/harden-runner's releases.

v2.19.1

What's Changed

• fix: detect ubuntu-slim runners early and bail out by @​devantler in step-security/harden-runner#657

What the fix changes

• Harden-Runner will detect ubuntu-slim runners and exit cleanly with an informational log message, instead of post harden runner step failing on chown: invalid user: 'undefined'.

What the fix does not do

• Jobs running on ubuntu-slim will not be monitored by Harden-Runner. The agent relies on kernel-level features (that require elevated capabilities).
• Per GitHub's docs on single-CPU runners: "The container for ubuntu-slim runners runs in unprivileged mode. This means that some operations requiring elevated privileges such as mounting file systems, using Docker-in-Docker, or accessing low-level kernel features are not supported." Those low-level kernel features are what the agent needs, so monitoring inside the unprivileged container is not feasible today.

For StepSecurity enterprise customers If your security posture requires that workflows are always monitored, you can block the use of ubuntu-slim via workflow run policies see the Runner Label Policy docs. This lets you enforce that jobs only run on monitored runner types.

New Contributors

• @​devantler made their first contribution in step-security/harden-runner#657

Full Changelog: step-security/harden-runner@v2.19.0...v2.19.1

v2.19.0

What's Changed

New Runner Support

Harden-Runner now supports Depot, Blacksmith, Namespace, and WarpBuild runners with the same egress monitoring, runtime monitoring, and policy enforcement available on GitHub-hosted runners.

Automated Incident Response for Supply Chain Attacks

• Global block list: Outbound connections to known malicious domains and IPs are now blocked even in audit mode.
• System-defined detection rules: Harden-Runner will trigger lockdown mode when a high risk event is detected during an active supply chain attack (for example, a process reading the memory of the runner worker process, a common technique for stealing GitHub Actions secrets).

Bug Fixes

Windows and macOS: stability and reliability fixes

Full Changelog: step-security/harden-runner@v2.18.0...v2.19.0

v2.18.0

What's Changed

Global Block List: During supply chain incidents like the recent axios and trivy compromises, StepSecurity will add known malicious domains and IP addresses (IOCs) to a global block list. These will be automatically blocked, even in audit mode, providing immediate protection without requiring any workflow changes.

Deploy on Self-Hosted VM: Added deploy-on-self-hosted-vm input that allows the Harden Runner agent to be installed directly on ephemeral self-hosted Linux runner VMs at workflow runtime. This is intended as an alternative when baking the agent into the VM image is not possible.

Full Changelog: step-security/harden-runner@v2.17.0...v2.18.0

v2.17.0

What's Changed

Policy Store Support

Added use-policy-store and api-key inputs to fetch security policies directly from the StepSecurity Policy Store. Policies can be defined and attached at the workflow, repo, org, or cluster (ARC) level, with the most granular policy taking precedence. This is the preferred method over the existing policy input which requires id-token: write permission. If no policy is found in the store, the action defaults to audit mode.

Full Changelog: step-security/harden-runner@v2.16.1...v2.17.0

v2.16.1

... (truncated)

Commits

• a5ad31d Merge pull request #657 from devantler/fix/ubuntu-slim-user-env
• 6e92856 build dist and trim ubuntu-slim message
• 4e0504e Merge branch 'main' into fix/ubuntu-slim-user-env
• 8d3c67d Release v2.19.0 (#661)
• 6c3c2f2 Feature/deploy on self hosted vm (#658)
• 376d25a fix: detect ubuntu-slim runners early and bail out
• f808768 Feature/policy store (#656)
• fe10465 v2.16.1 (#654)
• fa2e9d6 Release v2.16.0 (#646)
• See full diff in compare view

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[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

OpenSSF Scorecard

Package	Version	Score	Details
actions/step-security/harden-runner	a5ad31d6a139d249332a2605b85202e8c0b78450	🟢 8.2	Details Check Score Reason Binary-Artifacts 🟢 10 no binaries found in the repo Branch-Protection 🟢 8 branch protection is not maximal on development and all release branches CI-Tests 🟢 10 15 out of 15 merged PRs checked by a CI test -- score normalized to 10 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Code-Review 🟢 10 all changesets reviewed Contributors 🟢 6 project has 2 contributing companies or organizations -- score normalized to 6 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Dependency-Update-Tool 🟢 10 update tool detected Fuzzing ⚠️ 0 project is not fuzzed License 🟢 10 license file detected Maintained 🟢 10 14 commit(s) and 4 issue activity found in the last 90 days -- score normalized to 10 Packaging ⚠️ -1 packaging workflow not detected Pinned-Dependencies 🟢 6 dependency not pinned by hash detected -- score normalized to 6 SAST 🟢 10 SAST tool is run on all commits Security-Policy 🟢 10 security policy file detected Signed-Releases ⚠️ -1 no releases found Token-Permissions 🟢 10 GitHub workflow tokens follow principle of least privilege Vulnerabilities 🟢 4 6 existing vulnerabilities detected

Scanned Files

• .github/workflows/scorecards.yml