CVE-2026-20818 Windows内核日志敏感信息泄露漏洞

# CVE-2026-20818 Windows Kernel Information Disclosure PoC # Author: Security Researcher # Note: This PoC demonstrates the vulnerability concept import os import sys import subprocess def check_vulnerability(): """ Check if the system is vulnerable to CVE-2026-20818 This vulnerability allows local attackers to read sensitive information from Windows Kernel logs """ print("[*] CVE-2026-20818 Windows Kernel Information Disclosure Check") print("[*] Target: Windows Kernel") print("[*] Vulnerability: Sensitive information insertion into log file") # Check Windows version try: result = subprocess.run(['systeminfo'], capture_output=True, text=True) print(f"\n[+] System Information:") for line in result.stdout.split('\n')[:5]: print(f" {line}") except Exception as e: print(f"[-] Error gathering system info: {e}") # Check for sensitive data in common log locations log_paths = [ r'C:\Windows\System32\winevt\Logs', r'C:\Windows\System32\config\SYSTEM', r'C:\Windows\Debug\mrt.log' ] print("\n[*] Checking accessible log files...") for path in log_paths: if os.path.exists(path): print(f"[+] Found: {path}") try: files = os.listdir(path) for f in files[:5]: print(f" - {f}") except PermissionError: print(f" [-] Access denied") # Check for kernel debug output print("\n[*] Checking kernel debug settings...") try: result = subprocess.run( ['reg', 'query', 'HKLM\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Debug Print Filter'], capture_output=True, text=True ) if result.returncode == 0: print("[+] Debug Print Filter found") print(result.stdout) except: pass print("\n[*] Mitigation: Apply Microsoft security updates") print("[*] Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20818") return True if __name__ == "__main__": if sys.platform != "win32": print("[-] This PoC is designed for Windows systems only") sys.exit(1) check_vulnerability()