smb-signing: SMB Signing Not Required

id: smb-signing

info:
  name: SMB Signing Not Required
  author: pussycat0x
  severity: medium
  description: |
    Signing is not required on the remote SMB server. An unauthenticated, remote attacker can exploit this to conduct man-in-the-middle attacks against the SMB server.
  reference:
    - https://www.tenable.com/plugins/nessus/57608
    - https://nmap.org/nsedoc/scripts/smb2-security-mode.html
  metadata:
    verified: true
    max-request: 1
    shodan-query: port:445
    product: dionaea
    vendor: dionaea
  tags: js,network,smb,enum,vuln
javascript:
  - pre-condition: |
      isPortOpen(Host,Port);
    code: |
      var m = require("nuclei/smb");
      var c = m.SMBClient();
      var response = c.ListSMBv2Metadata(Host, Port, User, Pass);
      Export(response);

    args:
      Host: "{{Host}}"
      Port: "445"
      User: "test"
      Pass: "test"

    matchers:
      - type: word
        words:
          - '"SigningEnabled": true'
          - '"SigningRequired": false'
        condition: and
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