CVE-2022-37992: Windows 10 Privilege Escalation Vulnerability

CVE-2022-37992 Overview

CVE-2022-37992 is a Windows Group Policy Elevation of Privilege vulnerability affecting a wide range of Microsoft Windows operating systems, including both client and server editions. This vulnerability allows an authenticated local attacker to exploit weaknesses in the Windows Group Policy processing mechanism to gain elevated privileges on the target system.

Critical Impact

Successful exploitation enables attackers to escalate from a low-privileged local user to gain high-level access, potentially compromising confidentiality, integrity, and availability of the affected system.

Affected Products

• Microsoft Windows 10 (multiple versions including 20H2, 21H1, 21H2, 22H2, 1607, 1809)
• Microsoft Windows 11 (including 22H2, ARM64, and x64 editions)
• Microsoft Windows 7 SP1
• Microsoft Windows 8.1
• Microsoft Windows RT 8.1
• Microsoft Windows Server 2008 (SP2 and R2 SP1)
• Microsoft Windows Server 2012 (including R2)
• Microsoft Windows Server 2016
• Microsoft Windows Server 2019
• Microsoft Windows Server 2022 (including Azure edition)

Discovery Timeline

• 2022-11-09 - CVE-2022-37992 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-37992

Vulnerability Analysis

This privilege escalation vulnerability exists within the Windows Group Policy component, a critical subsystem used for centralized configuration management in Windows environments. The vulnerability allows a local attacker with low privileges to escalate their access rights to achieve full control over the affected system.

The attack requires local access and does not require any user interaction, making it particularly dangerous in enterprise environments where attackers may have already achieved initial access through other means. Once exploited, the attacker can achieve high impacts to confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability stems from improper handling within the Windows Group Policy processing mechanism. While Microsoft has not disclosed specific technical details (classified as NVD-CWE-noinfo), privilege escalation vulnerabilities in Group Policy typically arise from insecure permission handling, race conditions during policy application, or improper validation of policy objects during the refresh cycle.

Attack Vector

The vulnerability requires local access to the target system, meaning an attacker must first establish a foothold on the machine, either through physical access or by compromising an existing low-privileged user account. The attack complexity is low, and no user interaction is required for successful exploitation.

The attack flow typically involves:

1. The attacker gains initial access to the system with a low-privileged account
2. The attacker triggers or waits for a Group Policy refresh cycle
3. During policy processing, the attacker exploits the vulnerability to inject malicious operations
4. The attacker gains elevated privileges, potentially achieving SYSTEM-level access

Detection Methods for CVE-2022-37992

Indicators of Compromise

• Unexpected privilege escalation events in Windows Security logs (Event ID 4672 with unusual accounts)
• Anomalous Group Policy Client service (gpsvc) behavior or crashes
• Suspicious modifications to Group Policy Objects (GPOs) or related registry keys
• Unusual process creation patterns originating from low-privileged user contexts executing with elevated privileges

Detection Strategies

• Monitor Windows Event Log for Security events related to privilege escalation (Event IDs 4672, 4673, 4674)
• Enable and review Group Policy operational logs (Microsoft-Windows-GroupPolicy/Operational)
• Implement endpoint detection rules to identify abnormal process ancestry chains involving gpupdate.exe or gpsvc.dll
• Deploy behavioral analytics to detect privilege escalation patterns from local users

Monitoring Recommendations

• Configure SIEM rules to alert on privilege escalation events from non-administrative accounts
• Monitor for unusual Group Policy refresh requests using gpupdate /force from non-standard processes
• Implement file integrity monitoring on Group Policy-related system files and directories
• Track changes to the HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Group Policy registry keys

How to Mitigate CVE-2022-37992

Immediate Actions Required

• Apply the Microsoft security update released in November 2022 Patch Tuesday immediately
• Prioritize patching domain controllers and systems with sensitive data or administrative access
• Audit local user accounts and remove unnecessary local access privileges
• Implement network segmentation to limit lateral movement opportunities

Patch Information

Microsoft has released security updates to address this vulnerability as part of their November 2022 security updates. The official security advisory and patch information is available through the Microsoft Security Response Center. Organizations should deploy the appropriate cumulative update for their Windows version through Windows Update, WSUS, or Microsoft Update Catalog.

Workarounds

• Restrict local logon rights to minimize the number of users who could potentially exploit this vulnerability
• Implement Application Control policies to prevent unauthorized code execution
• Enable Credential Guard on supported Windows versions to protect against credential theft following privilege escalation
• Use Protected Users security group for privileged accounts to add additional protections

# Verify patch installation status
wmic qfe list | findstr KB5019959
# Check Group Policy service status
sc query gpsvc
# Force Group Policy refresh after patching
gpupdate /force