RCE in Actions Toolkit
CVE-2022-35954
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`.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Actions Toolkit — versions <= 1.9.0
- GitHub Toolkit
Weakness classification (CWE)
References
- github.com/actions/toolkit/security/advisories/GHSA-7r3h-m5j6-3q42 (Third Party Advisory)
- github.com/actions/toolkit/commit/4beda9cbc00ba6eefe387a937c21087ccb8ee9df (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-35954?
- CVE-2022-35954 is a medium-severity vulnerability in Actions Toolkit, classified under Command Injection. CVSS score: 5.0/10. Published 2022-08-15.
- How severe is CVE-2022-35954?
- Medium severity. CVSS v3 base score is 5.0 out of 10.