CVE-2022-35954 Delimiter injection vulnerability in @actions/core exportVariable

2022-08-1323:40:09

CWE-77

GitHub_M

www.cve.org

cve-2022-35954

delimiter injection

github actions toolkit

core.exportvariable

github_env

@actions/core v1.9.1

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

EPSS

0.001

Percentile

19.4%

JSON

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.

CNA Affected

[
  {
    "product": "toolkit",
    "vendor": "actions",
    "versions": [
      {
        "status": "affected",
        "version": "<= 1.9.0"
      }
    ]
  }
]