9.9
CRITICAL
CVE-2022-39321
GitHub Actions Runner Environment Variable Escaping Vulnerability
Description

GitHub Actions Runner is the application that runs a job from a GitHub Actions workflow. The actions runner invokes the docker cli directly in order to run job containers, service containers, or container actions. A bug in the logic for how the environment is encoded into these docker commands was discovered in versions prior to 2.296.2, 2.293.1, 2.289.4, 2.285.2, and 2.283.4 that allows an input to escape the environment variable and modify that docker command invocation directly. Jobs that use container actions, job containers, or service containers alongside untrusted user inputs in environment variables may be vulnerable. The Actions Runner has been patched, both on `github.com` and hotfixes for GHES and GHAE customers in versions 2.296.2, 2.293.1, 2.289.4, 2.285.2, and 2.283.4. GHES and GHAE customers may want to patch their instance in order to have their runners automatically upgrade to these new runner versions. As a workaround, users may consider removing any container actions, job containers, or service containers from their jobs until they are able to upgrade their runner versions.

INFO

Published Date :

Oct. 25, 2022, 5:15 p.m.

Last Modified :

Nov. 21, 2024, 7:18 a.m.

Remotely Exploitable :

Yes !

Impact Score :

6.0

Exploitability Score :

3.1
Affected Products

The following products are affected by CVE-2022-39321 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Gitlab runner
1 Github runner
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2022-39321.

URL Resource
https://github.com/actions/runner/pull/2107 Patch Release Notes Third Party Advisory
https://github.com/actions/runner/pull/2108 Patch Third Party Advisory
https://github.com/actions/runner/security/advisories/GHSA-2c6m-6gqh-6qg3 Third Party Advisory
https://github.com/actions/runner/pull/2107 Patch Release Notes Third Party Advisory
https://github.com/actions/runner/pull/2108 Patch Third Party Advisory
https://github.com/actions/runner/security/advisories/GHSA-2c6m-6gqh-6qg3 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2022-39321 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2022-39321 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://github.com/actions/runner/pull/2107
    Added Reference https://github.com/actions/runner/pull/2108
    Added Reference https://github.com/actions/runner/security/advisories/GHSA-2c6m-6gqh-6qg3
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Oct. 28, 2022

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type https://github.com/actions/runner/pull/2107 No Types Assigned https://github.com/actions/runner/pull/2107 Patch, Release Notes, Third Party Advisory
    Changed Reference Type https://github.com/actions/runner/pull/2108 No Types Assigned https://github.com/actions/runner/pull/2108 Patch, Third Party Advisory
    Changed Reference Type https://github.com/actions/runner/security/advisories/GHSA-2c6m-6gqh-6qg3 No Types Assigned https://github.com/actions/runner/security/advisories/GHSA-2c6m-6gqh-6qg3 Third Party Advisory
    Added CWE NIST CWE-78
    Added CPE Configuration OR *cpe:2.3:a:github:runner:*:*:*:*:*:*:*:* versions up to (excluding) 2.283.4 *cpe:2.3:a:github:runner:*:*:*:*:*:*:*:* versions from (including) 2.284.0 up to (excluding) 2.285.2 *cpe:2.3:a:github:runner:*:*:*:*:*:*:*:* versions from (including) 2.286.0 up to (excluding) 2.289.4 *cpe:2.3:a:github:runner:*:*:*:*:*:*:*:* versions from (including) 2.290.0 up to (excluding) 2.293.1 *cpe:2.3:a:github:runner:*:*:*:*:*:*:*:* versions from (including) 2.294.0 up to (excluding) 2.296.2
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2022-39321 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.17 }} 0.05%

score

0.54340

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
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