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CVE-2023-27581

8.8 · HIGH

github-slug-action is a GitHub Action to expose slug value of GitHub environment variables inside of one's GitHub workflow.

Published Mar 13, 2023CWE-77EPSS 1.58%

Overview

CVE-2023-27581 is a high-severity vulnerability. It was published on March 13, 2023 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

github-slug-action is a GitHub Action to expose slug value of GitHub environment variables inside of one's GitHub workflow. Starting in version 4.0.0` and prior to version 4.4.1, this action uses the `github.head_ref` parameter in an insecure way. This vulnerability can be triggered by any user on GitHub on any workflow using the action on pull requests. They just need to create a pull request with a branch name, which can contain the attack payload. This can be used to execute code on the GitHub runners and to exfiltrate any secrets one uses in the CI pipeline. A patched action is available in version 4.4.1. No workaround is available.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/rlespinasse/github-slug-action/commit/102b1a064a9b145e56556e22b18b19c624538d94GitHubgithub.com/rlespinasse/github-slug-action/releases/tag/v4.4.1GitHubgithub.com/rlespinasse/github-slug-action/security/advisories/GHSA-6q4m-7476-932wGitHubsecuritylab.github.com/research/github-actions-untrusted-input/GitHubgithub.com/rlespinasse/github-slug-action/commit/102b1a064a9b145e56556e22b18b19c624538d94GitHubgithub.com/rlespinasse/github-slug-action/releases/tag/v4.4.1GitHubgithub.com/rlespinasse/github-slug-action/security/advisories/GHSA-6q4m-7476-932wGitHubsecuritylab.github.com/research/github-actions-untrusted-input/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-27581?

CVE-2023-27581 is a high-severity vulnerability. It was published on March 13, 2023 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2023-27581?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-27581?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-27581?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-27581 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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