CVE-2024-38244
📋 TL;DR
This vulnerability allows attackers to elevate privileges on Windows systems by exploiting a flaw in the Kernel Streaming Service Driver. Attackers with initial access to a system can gain SYSTEM-level privileges, enabling complete control. This affects Windows systems with the vulnerable driver.
💻 Affected Systems
- 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 10 22h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, allowing installation of persistent malware, credential theft, and lateral movement across networks.
Likely Case
Local privilege escalation from a standard user or low-privileged account to SYSTEM, enabling attackers to bypass security controls and maintain persistence.
If Mitigated
Limited impact if proper endpoint protection, least privilege principles, and network segmentation are implemented, though exploitation could still occur.
🎯 Exploit Status
Requires local access and ability to execute code. No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38244
Restart Required: Yes
Instructions:
1. Apply latest Windows security updates from Microsoft. 2. Restart affected systems. 3. Verify patch installation via Windows Update history.
🔧 Temporary Workarounds
Disable Kernel Streaming Service Driver
windowsDisable the vulnerable driver if not required for system functionality
sc config ks.sys start= disabled
sc stop ks.sys
🧯 If You Can't Patch
- Implement strict least privilege access controls to limit initial attack surface
- Deploy endpoint detection and response (EDR) solutions to detect privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2024-38244Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify KB patch is installed via 'wmic qfe list' or Windows Update history📡 Detection & Monitoring
Log Indicators:
- Unusual process creation with SYSTEM privileges
- Driver loading events related to ks.sys
- Security log events showing privilege escalation
Network Indicators:
- Lateral movement attempts following local privilege escalation
SIEM Query:
EventID=4688 AND NewProcessName CONTAINS 'cmd.exe' AND SubjectUserName NOT IN (authorized_users) AND TokenElevationType=%%1938