Microsoft Silverlight Double Dereference Remote Code Execution Vulnerability (CVE-2013-0074)

# Audit Silverlight installation and version
Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Where-Object { $_.DisplayName -like '*Silverlight*' } | Select-Object DisplayName, DisplayVersion, UninstallString

# Silently uninstall Silverlight
$app = Get-WmiObject -Class Win32_Product | Where-Object { $_.Name -like '*Silverlight*' }
if ($app) {
    Write-Host 'Uninstalling Microsoft Silverlight...'
    $app.Uninstall()
    Write-Host 'Uninstall completed successfully.'
} else {
    Write-Host 'Microsoft Silverlight is not installed.'
}

:: Set Kill-Bit for Silverlight ActiveX CLSID {DFEAF541-F3E1-4c24-ACAC-99C071D7730A}
reg add "HKLM\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{DFEAF541-F3E1-4c24-ACAC-99C071D7730A}" /v "Compatibility Flags" /t REG_DWORD /d 0x00000400 /f
reg add "HKLM\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{DFEAF541-F3E1-4c24-ACAC-99C071D7730A}" /v "Compatibility Flags" /t REG_DWORD /d 0x00000400 /f

# Scan and verify agcore.dll version
$targetPaths = @("${env:ProgramFiles}\Microsoft Silverlight", "${env:ProgramFiles(x86)}\Microsoft Silverlight")
foreach ($dir in $targetPaths) {
    $dll = Join-Path $dir 'agcore.dll'
    if (Test-Path $dll) {
        $ver = (Get-Item $dll).VersionInfo.FileVersion
        Write-Host "Detected: $dll [Version: $ver]"
        if ([version]$ver -lt [version]'5.1.20125.0') {
            Write-Warning 'VULNERABLE: Outdated Silverlight binary detected.'
        } else {
            Write-Host 'Secure: Patched version detected.' -ForegroundColor Green
        }
    }
}