CVE-2024-30027
📋 TL;DR
This is a Windows NTFS privilege escalation vulnerability that allows an authenticated attacker to gain SYSTEM-level privileges on a vulnerable system. It affects Windows operating systems and requires local access to exploit. Attackers must already have some level of access to the system to leverage this vulnerability.
💻 Affected Systems
- Microsoft Windows
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 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
An attacker with initial access can achieve full SYSTEM privileges, enabling complete system compromise, installation of persistent malware, credential theft, and lateral movement across the network.
Likely Case
An authenticated attacker (standard user) elevates to SYSTEM privileges to bypass security controls, install malicious software, or access protected system resources.
If Mitigated
With proper access controls and least privilege principles, the impact is limited as attackers would need initial access, but successful exploitation still grants full system control.
🎯 Exploit Status
Exploitation requires local access and some level of authentication. The vulnerability involves double-free conditions in NTFS handling.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply the May 2024 Windows security updates (Patch Tuesday)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30027
Restart Required: Yes
Instructions:
1. Open Windows Update settings. 2. Click 'Check for updates'. 3. Install all available security updates. 4. Restart the system when prompted. For enterprise environments, deploy through WSUS, SCCM, or Intune.
🔧 Temporary Workarounds
Restrict local access
windowsLimit who has local login access to systems through group policies and access controls
Implement least privilege
windowsEnsure users operate with minimal necessary privileges to reduce impact if exploited
🧯 If You Can't Patch
- Implement strict access controls and monitor for privilege escalation attempts
- Segment networks to limit lateral movement potential
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for May 2024 security updates or run: wmic qfe list | findstr "KB5037771" (update KB number may vary)Check Version:
winverVerify Fix Applied:
Verify the May 2024 security updates are installed via Windows Update history or Settings > Windows Update > Update history📡 Detection & Monitoring
Log Indicators:
- Windows Security Event ID 4688 (process creation) showing unexpected SYSTEM privilege processes
- Event ID 4672 (special privileges assigned) for unusual accounts
Network Indicators:
- Unusual outbound connections from systems after local access
- Lateral movement attempts from previously compromised systems
SIEM Query:
EventID=4688 AND NewProcessName CONTAINS "cmd.exe" OR "powershell.exe" AND SubjectUserName!=SYSTEM AND TokenElevationType=%%1938