CVE-2023-52137 Information

Description

The tj-actions/verify-changed-files action allows for command injection in changed filenames allowing an attacker to execute arbitrary code and potentially leak secrets. The verify-changed-files workflow returns the list of files changed within a workflow execution. This could potentially allow filenames that contain special characters such as ; which can be used by an attacker to take over the GitHub Runner if the output value is used in a raw fashion (thus being directly replaced before execution) inside a run block. By running custom commands an attacker may be able to steal secrets such as GITHUB_TOKEN if triggered on other events than pull_request.

This has been patched in versions 17 and 17.0.0 by enabling safe_output by default and returning filename paths escaping special characters for bash environments.

Reference

https://github.com/tj-actions/verify-changed-files/security/advisories/GHSA-ghm2-rq8q-wrhc https://github.com/tj-actions/verify-changed-files/commit/498d3f316f501aa72485060e8c96fde7b2014f12 https://github.com/tj-actions/verify-changed-files/commit/592e305da041c09a009afa4a43c97d889bed65c3