CVE-2024-38070
📋 TL;DR
This vulnerability allows attackers to bypass Windows LockDown Policy (WLDP) security features, potentially enabling execution of untrusted code. It affects Windows systems with WLDP enabled, primarily impacting enterprise environments using application control policies. Attackers could exploit this to circumvent security restrictions and run malicious code.
💻 Affected Systems
- Microsoft Windows
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete bypass of application control policies allowing execution of arbitrary malicious code with system privileges, leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Targeted attackers bypassing application whitelisting to execute specific malicious payloads or tools that would normally be blocked by WLDP policies.
If Mitigated
Limited impact with proper network segmentation, least privilege principles, and additional security controls in place to detect and block malicious activity.
🎯 Exploit Status
Exploitation requires local access and knowledge of the vulnerability. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: July 2024 security updates (KB5040437 for Windows 11, KB5040431 for Windows 10, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38070
Restart Required: Yes
Instructions:
1. Apply the July 2024 Windows security updates from Windows Update or Microsoft Update Catalog. 2. Restart the system to complete the installation. 3. Verify the update is installed via winver or system information.
🔧 Temporary Workarounds
Disable WLDP (Not Recommended)
windowsDisabling Windows LockDown Policy removes the security feature entirely, which may not be acceptable for security compliance.
🧯 If You Can't Patch
- Implement strict network segmentation to limit lateral movement
- Enforce least privilege access and monitor for unusual process execution
🔍 How to Verify
Check if Vulnerable:
Check if July 2024 security updates are not installed and WLDP is enabled via PowerShell: Get-ComputerInfo -Property WindowsVersionCheck Version:
winver or systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify July 2024 security updates are installed via: wmic qfe list | findstr KB5040437 (or appropriate KB for your version)📡 Detection & Monitoring
Log Indicators:
- Event ID 3076 in Windows Defender Application Control logs indicating policy bypass attempts
- Unusual process execution from unexpected locations
Network Indicators:
- Unusual outbound connections from systems with WLDP enabled
- Lateral movement attempts from compromised systems
SIEM Query:
EventID=3076 AND Source="Microsoft-Windows-CodeIntegrity" AND EventData contains "WLDP"