CVE-2022-30151
📋 TL;DR
This vulnerability in the Windows Ancillary Function Driver for WinSock allows an authenticated attacker to execute arbitrary code with SYSTEM privileges. It affects Windows systems where an attacker has local access and can exploit the driver's improper handling of objects in memory. This is an elevation of privilege vulnerability that requires an attacker to already have some level of access to the target system.
💻 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 10 by Microsoft
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 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 11 by Microsoft
Windows 11 by Microsoft
Windows 7 by Microsoft
Windows 7 by Microsoft
Windows 8.1 by Microsoft
Windows 8.1 by Microsoft
Windows Rt 8.1 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access gains full SYSTEM privileges, enabling complete system compromise, installation of malware, credential theft, and lateral movement across the network.
Likely Case
An authenticated attacker elevates their privileges from standard user to SYSTEM, allowing them to bypass security controls, install persistent backdoors, or access sensitive system resources.
If Mitigated
With proper access controls and least privilege principles, the impact is limited as attackers would need initial access, and privilege escalation would be contained within the compromised system.
🎯 Exploit Status
Exploitation requires local access and authentication. Proof-of-concept code has been published, making weaponization likely. The vulnerability involves improper handling of objects in memory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: June 2022 security updates (KB5014699 for Windows 10, KB5014697 for Windows 11, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30151
Restart Required: Yes
Instructions:
1. Apply the June 2022 Windows security updates from Windows Update. 2. For enterprise environments, deploy updates via WSUS, SCCM, or Intune. 3. Restart systems after patch installation.
🔧 Temporary Workarounds
Restrict local access
windowsLimit local access to systems through physical security, user account controls, and endpoint protection.
🧯 If You Can't Patch
- Implement strict least privilege principles to limit what authenticated users can do
- Deploy endpoint detection and response (EDR) solutions to detect privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check if the June 2022 security updates are installed via 'wmic qfe list' or 'Get-Hotfix' in PowerShell.Check Version:
wmic os get caption,version,buildnumberVerify Fix Applied:
Verify KB5014699 (Windows 10) or KB5014697 (Windows 11) is installed and system has been restarted.📡 Detection & Monitoring
Log Indicators:
- Event ID 4688 (process creation) showing unexpected SYSTEM privilege processes
- Security logs showing privilege escalation patterns
Network Indicators:
- Unusual outbound connections from SYSTEM processes
- Lateral movement attempts from compromised systems
SIEM Query:
EventID=4688 AND NewProcessName="*" AND SubjectUserName!="SYSTEM" AND TokenElevationType="%%1936"