CVE-2022-24507
📋 TL;DR
CVE-2022-24507 is an elevation of privilege vulnerability in the Windows Ancillary Function Driver for WinSock. It allows authenticated attackers to execute arbitrary code with SYSTEM privileges by exploiting improper handling of objects in memory. This affects Windows systems where an attacker has local access.
💻 Affected Systems
- Microsoft Windows
📦 What is this software?
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 11 by Microsoft
Windows Server by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full SYSTEM privileges on the compromised system, enabling complete control, data theft, lateral movement, and persistence.
Likely Case
Local attackers escalate privileges from standard user to SYSTEM, bypassing security controls to install malware or access sensitive resources.
If Mitigated
With proper patching and least privilege principles, impact is limited to isolated systems; attackers cannot escalate beyond initial access level.
🎯 Exploit Status
Exploitation requires local authenticated access; public proof-of-concept code exists, making weaponization likely in targeted attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2022 security updates (KB5011493 for Windows 10 21H2, KB5011495 for Windows 11, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24507
Restart Required: Yes
Instructions:
1. Apply March 2022 Windows security updates via Windows Update. 2. For enterprise: Deploy through WSUS or Microsoft Endpoint Configuration Manager. 3. Verify update installation with 'wmic qfe list' showing relevant KB.
🔧 Temporary Workarounds
Restrict local access
windowsLimit local user accounts and implement least privilege to reduce attack surface.
🧯 If You Can't Patch
- Implement strict least privilege: Ensure users operate with minimal necessary permissions.
- Monitor for suspicious privilege escalation attempts using endpoint detection tools.
🔍 How to Verify
Check if Vulnerable:
Check if March 2022 security updates are missing: 'wmic qfe list | findstr KB5011493' (adjust KB for your version).Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify March 2022 updates are installed: 'systeminfo | findstr /B /C:"OS Name" /C:"OS Version"' and cross-reference with patch KB.📡 Detection & Monitoring
Log Indicators:
- Event ID 4688: New process creation with SYSTEM privileges from non-privileged accounts
- Unexpected service installations or registry modifications
Network Indicators:
- Not network exploitable; focus on host-based detection
SIEM Query:
EventID=4688 AND NewProcessName="*" AND SubjectUserName!="SYSTEM" AND TokenElevationType="%%1936"