CVE-2024-49114
📋 TL;DR
This vulnerability in the Windows Cloud Files Mini Filter Driver allows attackers to gain SYSTEM-level privileges on affected systems. It affects Windows 10, 11, Server 2019, and Server 2022. Successful exploitation requires an attacker to already have local access to the system.
💻 Affected Systems
- Windows 10
- Windows 11
- Windows Server 2019
- Windows Server 2022
📦 What is this software?
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full SYSTEM privileges, enabling complete system compromise, data theft, persistence establishment, and lateral movement across the network.
Likely Case
Privilege escalation from a lower-privileged user account to SYSTEM, allowing installation of malware, disabling security controls, and accessing sensitive system resources.
If Mitigated
Limited impact due to layered security controls, with potential detection through security monitoring and containment through network segmentation.
🎯 Exploit Status
Requires local access and ability to execute code; no public exploit code available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: November 2024 security updates (KB5032190 for Windows 10, KB5032190 for Windows 11, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49114
Restart Required: Yes
Instructions:
1. Open Windows Update settings. 2. Click 'Check for updates'. 3. Install all available updates. 4. Restart the system when prompted.
🔧 Temporary Workarounds
Disable Cloud Files Mini Filter Driver
windowsTemporarily disable the vulnerable driver component (may impact cloud file synchronization features)
fltmc unload cldflt
🧯 If You Can't Patch
- Implement strict least privilege access controls to limit local user privileges
- Enable Windows Defender Exploit Guard and configure Attack Surface Reduction rules
🔍 How to Verify
Check if Vulnerable:
Check if November 2024 security updates are installed via Settings > Windows Update > Update historyCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify KB5032190 (or equivalent for your OS version) appears in installed updates list📡 Detection & Monitoring
Log Indicators:
- Event ID 4697: Service installation attempts
- Suspicious process creation from non-standard locations
- Unexpected privilege escalation events
Network Indicators:
- Unusual outbound connections following local privilege escalation
SIEM Query:
EventID=4697 OR (ProcessName="cldflt.sys" AND EventID=1)