CVE-2022-35954

Description

## Impact The `core.exportVariable` function uses a well known delimiter that attackers can use to break out of that specific variable and assign values to other arbitrary variables. Workflows that write untrusted values to the `GITHUB_ENV` file may cause the path or other environment variables to be modified without the intention of the workflow or action author. ## Patches Users should upgrade to `@actions/core v1.9.1`. ## Workarounds If you are unable to upgrade the `@actions/core` package, you can modify your action to ensure that any user input does not contain the delimiter `_GitHubActionsFileCommandDelimeter_` before calling `core.exportVariable`. ## References [More information about setting-an-environment-variable in workflows](https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-environment-variable) If you have any questions or comments about this advisory: * Open an issue in [`actions/toolkit`](https://github.com/actions/toolkit/issues)

How to fix CVE-2022-35954

To remediate CVE-2022-35954, upgrade the affected package to a fixed version below.

• —upgrade to 1.9.1 or later

Is CVE-2022-35954 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 1.9.1

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-35954
• PATCHgithub.com/actions/toolkit
• WEBgithub.com/actions/toolkit/commit/4beda9cbc00ba6eefe387a937c21087ccb8ee9df
• WEBgithub.com/actions/toolkit/security/advisories/GHSA-7r3h-m5j6-3q42