CVE-2022-21874: Windows 10 Security Center RCE Vulnerability

CVE-2022-21874 Overview

CVE-2022-21874 is a Remote Code Execution (RCE) vulnerability affecting the Windows Security Center API across multiple versions of Microsoft Windows operating systems. This vulnerability allows an unauthenticated attacker to execute arbitrary code on vulnerable systems through the network without requiring any user interaction or prior privileges.

Critical Impact

This vulnerability enables remote attackers to fully compromise affected Windows systems, potentially leading to complete system takeover, data exfiltration, and lateral movement across enterprise networks.

Affected Products

• Microsoft Windows 10 (all versions including 1607, 1809, 1909, 20H2, 21H1, 21H2 across x64, x86, and ARM64 architectures)
• Microsoft Windows 11 (x64 and ARM64)
• Microsoft Windows Server 2016
• Microsoft Windows Server 2019
• Microsoft Windows Server 2022 and 20H2

Discovery Timeline

• January 11, 2022 - CVE-2022-21874 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2022-21874

Vulnerability Analysis

The Windows Security Center API Remote Code Execution vulnerability exists due to improper handling of requests by the Windows Security Center API component. This API is responsible for managing and reporting the security status of various Windows security features, including Windows Defender, firewall status, and third-party antivirus software integration.

An attacker exploiting this vulnerability can achieve complete compromise of the targeted system, gaining the ability to install programs, view, change, or delete data, and create new accounts with full user rights. The vulnerability requires no authentication and can be exploited remotely over the network, making it particularly dangerous for internet-facing systems and those accessible within compromised network segments.

Root Cause

The vulnerability stems from insufficient validation in the Windows Security Center API. While Microsoft has not disclosed the specific technical details (categorized as NVD-CWE-noinfo), the nature of the vulnerability as a remote code execution issue suggests improper input validation or memory handling in the API's request processing logic. The Security Center API exposes interfaces that can be manipulated to execute arbitrary code in the context of the affected service.

Attack Vector

The attack can be initiated remotely over the network without requiring authentication or user interaction. An attacker would craft malicious requests targeting the Windows Security Center API endpoints. Upon successful exploitation, the attacker gains code execution capabilities on the target system with the privileges of the Windows Security Center service.

The exploitation flow typically involves:

1. Identifying vulnerable Windows systems with accessible Security Center API
2. Crafting malicious payloads targeting the API vulnerability
3. Sending specially crafted requests to trigger the code execution
4. Gaining remote shell or establishing persistence on the compromised system

Detection Methods for CVE-2022-21874

Indicators of Compromise

• Unusual process spawning from wscsvc.dll or Windows Security Center service
• Anomalous network traffic patterns targeting Security Center API endpoints
• Unexpected child processes launched by svchost.exe hosting the Security Center service
• Suspicious registry modifications related to Windows Security Center configurations

Detection Strategies

• Monitor Windows Security Center service (wscsvc) for abnormal behavior including unexpected process creation
• Implement network intrusion detection rules for malformed or suspicious Security Center API requests
• Deploy endpoint detection solutions capable of identifying exploitation attempts against Windows system services
• Enable enhanced audit logging for Windows service activities and API calls

Monitoring Recommendations

• Enable Windows Event Log monitoring for Security Center service events (Event ID 5000 series in Application log)
• Configure SIEM alerts for anomalous process chains involving Security Center components
• Implement network traffic analysis to detect potential exploitation attempts
• Regularly audit systems for unauthorized changes to Security Center configurations

How to Mitigate CVE-2022-21874

Immediate Actions Required

• Apply the latest Windows security updates from Microsoft immediately
• Implement network segmentation to limit exposure of vulnerable systems
• Enable Windows Firewall rules to restrict unnecessary network access to affected services
• Prioritize patching internet-facing and business-critical Windows systems

Patch Information

Microsoft has released security updates to address this vulnerability as part of their January 2022 Patch Tuesday release. Administrators should obtain patches through Windows Update, Windows Server Update Services (WSUS), or the Microsoft Update Catalog. The patches address the vulnerability by correcting how the Windows Security Center API handles requests.

For detailed patch guidance, refer to the Microsoft Security Advisory for CVE-2022-21874.

Workarounds

• Restrict network access to Windows Security Center API using host-based firewall rules
• Implement network-level access controls to limit which systems can communicate with the Security Center service
• Consider temporary isolation of unpatched systems until patches can be applied
• Monitor vulnerable systems with enhanced logging and alerting capabilities

# Windows Firewall rule to restrict Security Center access (PowerShell)
# Apply as temporary mitigation until patches are deployed
New-NetFirewallRule -DisplayName "Block External WSC Access" `
  -Direction Inbound `
  -Program "%SystemRoot%\System32\svchost.exe" `
  -Service wscsvc `
  -Action Block `
  -RemoteAddress Any `
  -Profile Domain,Private,Public