Patch

CVE-2024-49039

with vRx

Vulnerability Overview

CVE Name

CVE-2024-49039

Severity

8.8

High

CVE Description

Windows Task Scheduler Elevation of Privilege Vulnerability

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Latest Patch info

Patch Name

secure@microsoft.com

Date

12.11.2024

Script

Script Type

Remediation script

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❗ CVE-2024-49039 is a vulnerability related to the Task Scheduler service in Windows systems. Attackers may leverage this service to execute unauthorized tasks or escalate privileges on a compromised system. ℹ️ This mitigation script works as follows: Registry Path Access: The script targets the registry path HKLM:\SYSTEM\CurrentControlSet\Services\Schedule, which controls the Task Scheduler service configuration. Service Startup Modification: Sets the Start value to 4, disabling the Task Scheduler service and preventing it from launching at system startup. Verification: Confirms the registry modification by reading back the Start value. If it is successfully set to 4, the mitigation is deemed effective. Output Results: Displays clear messages about the success of the operation and advises restarting the system to apply the changes. Error Handling: Includes robust error handling to capture and report issues encountered during the registry modification process. ✅ By running this mitigation script, you can remove the exploitable functionality, preventing attackers from leveraging the vulnerability to escalate privileges and protecting your system from CVE-2024-49039.

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try {
    # Registry path for Task Scheduler service
    $registryPath = "HKLM:\SYSTEM\CurrentControlSet\Services\Schedule"
    
    # Disable Task Scheduler startup
    Write-Host "Disabling Task Scheduler service via registry..." -ForegroundColor Yellow
    Set-ItemProperty -Path $registryPath -Name "Start" -Value 4 -ErrorAction Stop
    Write-Host "Task Scheduler is now prevented from launching at startup." -ForegroundColor Green
    
    # Verify the change
    $currentValue = (Get-ItemProperty -Path $registryPath -Name "Start").Start
    if ($currentValue -eq 4) {
        Write-Host "Registry modification successful. Task Scheduler has been disabled." -ForegroundColor Green
        Write-Host "Please restart your system to ensure the configuration changes take effect." -ForegroundColor Yellow
    } else {
        Write-Host "Failed to verify the registry change. Check the registry manually." -ForegroundColor Red
    }
} catch {
    Write-Host "An unexpected error occurred while modifying the registry:" -ForegroundColor Red
    Write-Host $_.Exception.Message -ForegroundColor Red
}

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Affected OS & Apps

Windows Server 2025

Microsoft

Windows 11 24H2

Microsoft

Windows Server 2022 23H2

Microsoft

Windows Server 2025

Microsoft

Windows 11 24H2

Microsoft

Windows Server 2022 23H2

Microsoft

Windows 11 23H2

Microsoft

Windows 11 22H2

Microsoft

Windows 10 22H2

Microsoft

Windows 10 21H2

Microsoft

Windows 10 1607

Microsoft

Windows 10 1507

Microsoft

Windows 10 1809

Microsoft

Windows Server 2022

Microsoft

Windows Server 2019

Microsoft

Windows Server 2016

Microsoft

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