CVE-2024-30035
📋 TL;DR
This vulnerability in the Windows Desktop Window Manager (DWM) Core Library allows an authenticated attacker to execute arbitrary code with SYSTEM privileges. It affects Windows systems where an attacker has local access and can exploit a use-after-free condition. This is an elevation of privilege vulnerability that requires initial access to the system.
💻 Affected Systems
- Windows Desktop Window Manager (DWM) Core Library
📦 What is this software?
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
An attacker with local access gains full SYSTEM privileges, enabling complete system compromise, persistence installation, credential theft, and lateral movement across the network.
Likely Case
An authenticated attacker elevates from standard user to SYSTEM privileges to install malware, disable security controls, or access sensitive system resources.
If Mitigated
With proper access controls and least privilege principles, impact is limited to the compromised user account without SYSTEM escalation.
🎯 Exploit Status
Requires local authenticated access and exploitation of a use-after-free condition (CWE-416).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: May 2024 security updates (KB5037771 for Windows 11, KB5037768 for Windows 10, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30035
Restart Required: Yes
Instructions:
1. Open Windows Update settings. 2. Check for updates. 3. Install May 2024 security updates. 4. Restart the system when prompted.
🔧 Temporary Workarounds
Restrict local access
windowsLimit local user access to systems through strict access controls and monitoring.
🧯 If You Can't Patch
- Implement strict least privilege principles for all user accounts
- Monitor for suspicious privilege escalation attempts using security tools
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for May 2024 security updates or use 'systeminfo' command to verify OS build number.Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify May 2024 security updates are installed via Windows Update history or check OS build number matches patched versions.📡 Detection & Monitoring
Log Indicators:
- Event ID 4688 with parent process anomalies
- Unexpected privilege escalation events
- DWM process crashes or anomalies
Network Indicators:
- None - this is a local privilege escalation vulnerability
SIEM Query:
EventID=4688 AND (NewProcessName LIKE '%cmd.exe%' OR NewProcessName LIKE '%powershell.exe%') AND SubjectLogonId != 0x3e7 AND ParentProcessName LIKE '%dwm.exe%'