CVE-2022-22037
📋 TL;DR
This vulnerability allows an authenticated attacker to exploit a flaw in Windows Advanced Local Procedure Call (ALPC) to elevate privileges from a lower-privileged account to SYSTEM level. It affects Windows operating systems where an attacker already has local access. Successful exploitation requires the attacker to have initial access to the 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
Attacker gains full SYSTEM privileges, enabling complete control over the compromised system, installation of malware, credential theft, and lateral movement across the network.
Likely Case
Privilege escalation from a standard user account to SYSTEM, allowing installation of persistent backdoors, disabling security controls, and accessing sensitive data.
If Mitigated
Limited impact if proper patch management and least privilege principles are enforced, though initial compromise could still occur.
🎯 Exploit Status
Exploitation requires local authenticated access and knowledge of the ALPC mechanism. No public proof-of-concept has been disclosed as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: July 2022 security updates (KB5015807, KB5015814, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-22037
Restart Required: Yes
Instructions:
1. Apply the July 2022 Windows security updates through Windows Update. 2. For enterprise environments, deploy updates via WSUS, SCCM, or Microsoft Endpoint Manager. 3. Restart systems after patch installation.
🔧 Temporary Workarounds
No official workarounds
windowsMicrosoft has not identified any workarounds for this vulnerability. Patching is the only mitigation.
🧯 If You Can't Patch
- Implement strict least privilege access controls to limit initial compromise opportunities
- Monitor for suspicious privilege escalation attempts using endpoint detection and response (EDR) tools
🔍 How to Verify
Check if Vulnerable:
Check if July 2022 security updates are installed via 'wmic qfe list' or 'Get-Hotfix' in PowerShell, looking for KB5015807, KB5015814, or related patches.Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the patch is installed and system has been restarted. Check Windows Update history for successful installation of July 2022 updates.📡 Detection & Monitoring
Log Indicators:
- Windows Security Event ID 4688 (process creation) showing unexpected SYSTEM privilege processes spawned from user accounts
- Event ID 4672 (special privileges assigned) for unusual privilege assignments
Network Indicators:
- No direct network indicators as this is local exploitation
SIEM Query:
EventID=4688 AND NewProcessName CONTAINS 'cmd.exe' AND SubjectUserName NOT IN ('SYSTEM', 'LOCAL SERVICE', 'NETWORK SERVICE') AND TokenElevationType='%%1938'