anti
e42fcab760
Tier 1 (upstream images): telnet (cowrie), smtp (mailoney), elasticsearch (elasticpot), conpot (Modbus/S7/SNMP ICS). Tier 2 (custom asyncio honeypots): pop3, imap, mysql, mssql, redis, mongodb, postgres, ldap, vnc, docker_api, k8s, sip, mqtt, llmnr, snmp, tftp — each with Dockerfile, entrypoint, and protocol-accurate handshake/credential capture. Adds 256 pytest cases covering registration, compose fragments, LOG_TARGET propagation, and Dockerfile presence for all 25 services. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
97 lines
2.6 KiB
Python
97 lines
2.6 KiB
Python
#!/usr/bin/env python3
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"""
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TFTP honeypot (UDP 69).
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Parses RRQ (read) and WRQ (write) requests, logs filename and transfer mode,
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then responds with an error packet. Logs all requests as JSON.
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"""
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import asyncio
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import json
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import os
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import socket
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import struct
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from datetime import datetime, timezone
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HONEYPOT_NAME = os.environ.get("HONEYPOT_NAME", "tftpserver")
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LOG_TARGET = os.environ.get("LOG_TARGET", "")
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# TFTP opcodes
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_RRQ = 1
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_WRQ = 2
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_ERROR = 5
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# TFTP Error packet: opcode(2) + error_code(2) + error_msg + NUL
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def _error_pkt(code: int, msg: str) -> bytes:
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return struct.pack(">HH", _ERROR, code) + msg.encode() + b"\x00"
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def _forward(event: dict) -> None:
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if not LOG_TARGET:
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return
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try:
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host, port = LOG_TARGET.rsplit(":", 1)
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with socket.create_connection((host, int(port)), timeout=3) as s:
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s.sendall((json.dumps(event) + "\n").encode())
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except Exception:
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pass
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def _log(event_type: str, **kwargs) -> None:
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event = {
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"ts": datetime.now(timezone.utc).isoformat(),
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"service": "tftp",
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"host": HONEYPOT_NAME,
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"event": event_type,
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**kwargs,
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}
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print(json.dumps(event), flush=True)
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_forward(event)
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class TFTPProtocol(asyncio.DatagramProtocol):
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def __init__(self):
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self._transport = None
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def connection_made(self, transport):
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self._transport = transport
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def datagram_received(self, data: bytes, addr):
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if len(data) < 4:
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return
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opcode = struct.unpack(">H", data[:2])[0]
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if opcode in (_RRQ, _WRQ):
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# Filename and mode are NUL-terminated strings after the opcode
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parts = data[2:].split(b"\x00")
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filename = parts[0].decode(errors="replace") if parts else ""
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mode = parts[1].decode(errors="replace") if len(parts) > 1 else ""
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_log(
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"request",
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src=addr[0],
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src_port=addr[1],
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op="RRQ" if opcode == _RRQ else "WRQ",
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filename=filename,
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mode=mode,
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)
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self._transport.sendto(_error_pkt(2, "Access violation"), addr)
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else:
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_log("unknown_opcode", src=addr[0], opcode=opcode, data=data[:32].hex())
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def error_received(self, exc):
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pass
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async def main():
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_log("startup", msg=f"TFTP honeypot starting as {HONEYPOT_NAME}")
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loop = asyncio.get_running_loop()
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transport, _ = await loop.create_datagram_endpoint(
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TFTPProtocol, local_addr=("0.0.0.0", 69)
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)
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try:
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await asyncio.sleep(float("inf"))
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finally:
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transport.close()
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if __name__ == "__main__":
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asyncio.run(main())
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