The following code is for security research and authorized testing only.
python
# CVE-2025-48813 PoC - Conceptual Exploit for VSM Expired Key Spoofing
# Note: This is a conceptual PoC based on vulnerability description.
# Actual exploitation requires deep knowledge of Windows VSM internals.
import subprocess
import ctypes
import sys
# Step 1: Check if current user has local access (required: PR:L)
def check_local_access():
"""Verify we have local low-privileged access"""
try:
result = subprocess.run(['whoami'], capture_output=True, text=True)
print(f"[+] Current user: {result.stdout.strip()}")
return True
except Exception as e:
print(f"[-] Access check failed: {e}")
return False
# Step 2: Check VSM/VBS status on the system
def check_vsm_status():
"""Check if Virtual Secure Mode is enabled"""
try:
result = subprocess.run(
['powershell', '-Command',
'(Get-CimInstance -Class Win32_DeviceGuard -Namespace root\Microsoft\Windows\DeviceGuard).VirtualizationBasedSecurityStatus'],
capture_output=True, text=True
)
print(f"[+] VBS Status: {result.stdout.strip()}")
return result.stdout.strip()
except Exception as e:
print(f"[-] VSM check failed: {e}")
return None
# Step 3: Attempt to exploit expired key in VSM
# The vulnerability allows using keys past their expiration date
def exploit_expired_key():
"""
Conceptual exploit: The VSM fails to properly invalidate expired keys.
An attacker with local access can attempt to leverage expired keys
for spoofing operations within the VSM context.
"""
print("[*] CVE-2025-48813 - VSM Expired Key Spoofing")
print("[*] Attempting to leverage expired key vulnerability...")
# In a real exploit, the attacker would:
# 1. Identify expired VSM security keys still accepted by the system
# 2. Use these keys to forge authentication tokens
# 3. Perform spoofing operations within the VSM protected context
# 4. Potentially bypass Credential Guard protections
# This requires interaction with low-level Windows kernel structures
# and VSM security subsystem internals
print("[!] This is a conceptual demonstration only")
print("[!] Actual exploitation requires kernel-level access and")
print("[!] detailed knowledge of VSM key management internals")
if __name__ == "__main__":
if check_local_access():
vsm_status = check_vsm_status()
if vsm_status:
exploit_expired_key()
else:
print("[-] VSM not detected or not enabled")
else:
print("[-] Local access required for exploitation")