CVE-2023-27581 – rlespinasse/github-slug-action

Package

Manager: github_actions
Name: rlespinasse/github-slug-action
Vulnerable Version: >=4.0.0 <4.4.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.03991 pctl0.87963

Details

github-slug-action vulnerable to arbitrary code execution ### Impact 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. (Note that first-time PR requests will not be run - but the attacker can submit a valid PR before submitting an invalid PR). This can be used to execute code on the GitHub runners (potentially use it for crypto-mining, and waste your resources) and to exfiltrate any secrets you use in the CI pipeline. ### Patches > Pass the variable as an environment variable and then use the environment variable instead of substituting it directly. Patched action is available on tag **v4**, tag **v4.4.1**, and any tag beyond. ### Workarounds No workaround is available if impacted, please upgrade the version > ℹ️ **v3** and **v4** are compatibles. ### References [Here](https://securitylab.github.com/research/github-actions-untrusted-input/) is a set of blog posts by Github's security team explaining this issue. ### Thanks Thanks to the team of researchers from Purdue University, who are working on finding vulnerabilities in CI/CD configurations of open-source software. Their tool detected this security vulnerability.

Metadata

Created: 2023-03-13T20:43:33Z
Modified: 2025-02-18T22:42:28Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-6q4m-7476-932w/GHSA-6q4m-7476-932w.json
CWE IDs: ["CWE-77"]
Alternative ID: GHSA-6q4m-7476-932w
Finding: F422
Auto approve: 1