CVE-2024-49084
📋 TL;DR
This Windows kernel vulnerability allows attackers with local access to elevate privileges from user mode to kernel mode. It affects Windows systems where an attacker can execute code with standard user permissions. Successful exploitation gives attackers SYSTEM-level access to the compromised machine.
💻 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 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, enabling installation of persistent malware, credential theft, lateral movement, and disabling of security controls.
Likely Case
Local privilege escalation allowing attackers to bypass security restrictions, install additional malware, or access protected system resources.
If Mitigated
Limited impact if proper endpoint protection, least privilege principles, and network segmentation are implemented.
🎯 Exploit Status
Requires local access and ability to execute code. CWE-362 indicates race condition vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply latest Windows security updates from Microsoft
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49084
Restart Required: Yes
Instructions:
1. Open Windows Update settings
2. Check for updates
3. Install all available security updates
4. Restart system when prompted
🔧 Temporary Workarounds
Restrict local user privileges
windowsImplement least privilege principle to limit what local users can execute
Enable Windows Defender Application Control
windowsRestrict execution of untrusted applications
🧯 If You Can't Patch
- Implement strict endpoint detection and response (EDR) to detect privilege escalation attempts
- Segment networks to limit lateral movement if system is compromised
🔍 How to Verify
Check if Vulnerable:
Check Windows version and installed updates against Microsoft Security Update GuideCheck Version:
winverVerify Fix Applied:
Verify latest security updates are installed via Windows Update history📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events in Windows Security logs
- Suspicious process creation with SYSTEM privileges
Network Indicators:
- Unusual outbound connections from system processes
SIEM Query:
EventID=4688 AND NewProcessName contains 'cmd.exe' OR 'powershell.exe' AND SubjectUserName != SYSTEM AND TokenElevationType != %%1936