CVE-2022-35954
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.
Does this matter?
Lower severity and a low EPSS score (0.67%). Track it; it rarely justifies an emergency change on its own.
Description
The GitHub Actions ToolKit provides a set of packages to make creating actions easier. 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. Users should upgrade to `@actions/core v1.9.1`. 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`.
- CVSS 3.1
- 5.0 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
- EPSS
- 0.67% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-77, CWE-74
- Affected
- github/toolkit
- Source
- security-advisories@github.com
References
- https://github.com/actions/toolkit/commit/4beda9cbc00ba6eefe387a937c21087ccb8ee9dfPatch, Third Party Advisory
- https://github.com/actions/toolkit/security/advisories/GHSA-7r3h-m5j6-3q42Third Party Advisory
- https://github.com/actions/toolkit/commit/4beda9cbc00ba6eefe387a937c21087ccb8ee9dfPatch, Third Party Advisory
- https://github.com/actions/toolkit/security/advisories/GHSA-7r3h-m5j6-3q42Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.