CVE-2022-31199: Netwrix Auditor RCE Vulnerability

CVE-2022-31199 Overview

CVE-2022-31199 is a critical remote code execution vulnerability affecting the Netwrix Auditor User Activity Video Recording component. This insecure deserialization flaw exists within the underlying protocol used by the component, potentially allowing an unauthenticated remote attacker to execute arbitrary code as the NT AUTHORITY\SYSTEM user on affected systems. The vulnerability impacts both the Netwrix Auditor server and agents installed on monitored systems, significantly amplifying the potential attack surface across enterprise environments.

Critical Impact

This vulnerability enables unauthenticated attackers to achieve remote code execution with SYSTEM-level privileges on both Netwrix Auditor servers and monitored endpoints. CISA has added this CVE to the Known Exploited Vulnerabilities catalog due to confirmed exploitation in the wild.

Affected Products

• Netwrix Auditor (all versions prior to security patch)
• Netwrix Auditor User Activity Video Recording component
• Netwrix Auditor agents installed on monitored systems

Discovery Timeline

• 2022-11-08 - CVE-2022-31199 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2022-31199

Vulnerability Analysis

This vulnerability is classified under CWE-502 (Deserialization of Untrusted Data), indicating that the Netwrix Auditor User Activity Video Recording component fails to properly validate serialized data before processing it. The flaw exists within the underlying communication protocol used by the component, which accepts and deserializes untrusted input without adequate security controls.

The vulnerability is particularly severe because successful exploitation requires no authentication and can be performed remotely over the network. An attacker who exploits this vulnerability gains code execution privileges as NT AUTHORITY\SYSTEM, the highest privilege level on Windows systems, providing complete control over the compromised host.

Root Cause

The root cause stems from insecure deserialization practices within the Netwrix Auditor User Activity Video Recording component. The underlying protocol implementation accepts serialized objects from remote sources without proper validation or sanitization. When maliciously crafted serialized data is processed by the vulnerable component, it can trigger arbitrary code execution during the deserialization process.

This type of vulnerability commonly occurs when applications trust serialized data from untrusted sources, failing to implement proper input validation, type checking, or integrity verification before deserialization operations.

Attack Vector

The attack vector for CVE-2022-31199 is network-based, meaning an attacker can exploit this vulnerability remotely without requiring local access to the target system. The attack flow typically involves:

1. The attacker identifies a Netwrix Auditor server or monitored agent with the vulnerable User Activity Video Recording component exposed on the network
2. The attacker crafts a malicious serialized payload designed to execute arbitrary commands upon deserialization
3. The payload is sent to the target system via the vulnerable protocol
4. The Netwrix Auditor component deserializes the malicious data without proper validation
5. Arbitrary code executes with NT AUTHORITY\SYSTEM privileges

The vulnerability requires no user interaction and no prior authentication, making it highly exploitable. For detailed technical analysis, refer to the Bishop Fox Blog Advisory.

Detection Methods for CVE-2022-31199

Indicators of Compromise

• Unexpected child processes spawned by Netwrix Auditor services running as NT AUTHORITY\SYSTEM
• Suspicious network connections to Netwrix Auditor ports from external or unauthorized IP addresses
• Anomalous process creation events involving common post-exploitation tools or command interpreters (cmd.exe, powershell.exe) originating from Netwrix Auditor processes
• Evidence of deserialization gadget chains in memory or network traffic analysis

Detection Strategies

• Monitor for unusual process hierarchies where Netwrix Auditor service processes spawn unexpected child processes
• Implement network intrusion detection rules to identify malformed or suspicious traffic targeting Netwrix Auditor communication protocols
• Deploy endpoint detection and response (EDR) solutions such as SentinelOne to detect exploitation attempts and post-exploitation activity
• Audit Windows Event Logs for process creation events (Event ID 4688) associated with Netwrix Auditor services

Monitoring Recommendations

• Enable enhanced logging for Netwrix Auditor services and regularly review logs for anomalies
• Implement network segmentation to limit exposure of Netwrix Auditor components to trusted networks only
• Configure SentinelOne agents on systems running Netwrix Auditor to provide real-time threat detection and automated response capabilities
• Establish baseline behavior for Netwrix Auditor processes to facilitate anomaly detection

How to Mitigate CVE-2022-31199

Immediate Actions Required

• Immediately apply the latest security patches from Netwrix to address CVE-2022-31199
• Restrict network access to Netwrix Auditor components to authorized management networks only
• Deploy SentinelOne endpoint protection on all systems running Netwrix Auditor server or agent components
• Conduct a security assessment to determine if any systems have been compromised

Patch Information

Organizations should consult the Bishop Fox Blog Advisory for technical details about the vulnerability and remediation guidance. Netwrix customers should check the vendor's official security bulletins and update to the latest patched version of Netwrix Auditor. Given that this vulnerability has been added to the CISA Known Exploited Vulnerabilities catalog, federal agencies and critical infrastructure organizations are required to remediate according to CISA's binding operational directives.

Workarounds

• If patching is not immediately possible, isolate Netwrix Auditor servers and agents from untrusted network segments using firewall rules
• Disable the User Activity Video Recording component if it is not required for business operations
• Implement strict network access controls to limit which systems can communicate with Netwrix Auditor services
• Monitor for exploitation attempts using network and endpoint detection capabilities while awaiting patch deployment

# Example firewall rule to restrict access to Netwrix Auditor (adjust ports as needed)
# Windows Firewall - Block external access to Netwrix Auditor ports
netsh advfirewall firewall add rule name="Block External Netwrix Access" dir=in action=block remoteip=any localport=9699 protocol=tcp
# Allow only trusted management subnet
netsh advfirewall firewall add rule name="Allow Trusted Netwrix Access" dir=in action=allow remoteip=10.0.0.0/24 localport=9699 protocol=tcp