Besu JSON-RPC HTTP Server - Detect

ID: besu-server-detect

Severity: info

Author: Nullfuzz

Tags: tech,besu,ethereum,web3,blockchain

Description

Besu is an open source Ethereum client developed under the Apache 2.0 license and written in Java. By default Besu runs a JSON-RPC HTTP server on port 8545/TCP

YAML Source

id: besu-server-detect

info:
  name: Besu JSON-RPC HTTP Server - Detect
  author: Nullfuzz
  severity: info
  description: |
    Besu is an open source Ethereum client developed under the Apache 2.0 license and written in Java. By default Besu runs a JSON-RPC HTTP server on port 8545/TCP
  reference:
    - https://besu.hyperledger.org/
    - https://besu.hyperledger.org/public-networks/how-to/use-besu-api#service-ports
  metadata:
    verified: true
    max-request: 1
    shodan-query: product:"besu"
  tags: tech,besu,ethereum,web3,blockchain

http:
  - raw:
      - |
        POST / HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"method":"web3_clientVersion","params":[],"id":1,"jsonrpc":"2.0"}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(header, "application/json")'
          - 'contains(body, "besu")'
        condition: and

    extractors:
      - type: regex
        part: body
        group: 1
        regex:
          - '(v[0-9.]+)'
# digest: 490a00463044022040d9cdbb173797234d9eb4f5b85fd69276d7b657188f0d5d631187de0979e2c202205f825bf5fdcdeb079690e739ae107bbda74951e0e69d4e27548ddd9cac3c7abd:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/technologies/besu-server-detect.yaml"

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