id: CVE-2020-13927

info:
  name: Airflow Experimental <1.10.11 - REST API Auth Bypass
  author: pdteam
  severity: critical
  description: |
    Airflow's Experimental API prior 1.10.11 allows all API requests without authentication.
  reference:
    - https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E
    - http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html
    - https://airflow.apache.org/docs/1.10.11/security.html#api-authenticatio
    - https://nvd.nist.gov/vuln/detail/CVE-2020-13927
  remediation: |
    From Airflow 1.10.11 forward, the default has been changed to deny all requests by default.  Note - this change fixes it for new installs but existing users need to change their config to default `[api]auth_backend = airflow.api.auth.backend.deny_all` as mentioned in the Updating Guide linked in the references.
  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-2020-13927
    cpe: cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
    epss-score: 0.95492
  metadata:
    max-request: 1
    verified: true
    shodan-query: title:"Airflow - DAGs" || http.html:"Apache Airflow"
  tags: packetstorm,cve,cve2020,apache,airflow,unauth,auth-bypass,kev

http:
  - method: GET
    path:
      - '{{BaseURL}}/api/experimental/latest_runs'

    matchers:
      - type: word
        part: body
        words:
          - '"dag_run_url":'
          - '"dag_id":'
          - '"items":'
        condition: and