CVE-2022-31704: VMware vRealize Log Insight RCE Vulnerability

CVE-2022-31704 Overview

CVE-2022-31704 is a broken access control vulnerability affecting VMware vRealize Log Insight. An unauthenticated malicious actor can remotely inject code into sensitive files of an impacted appliance which can result in remote code execution. This vulnerability allows attackers without any prior authentication to gain complete control over affected VMware vRealize Log Insight instances.

Critical Impact

This vulnerability enables unauthenticated remote code execution, allowing attackers to fully compromise VMware vRealize Log Insight appliances without requiring any credentials or user interaction.

Affected Products

• VMware vRealize Log Insight (all vulnerable versions prior to patch)
• VMware vRealize Log Insight virtual appliances deployed in enterprise environments
• VMware Aria Operations for Logs (formerly vRealize Log Insight)

Discovery Timeline

• 2023-01-26 - CVE-2022-31704 published to NVD
• 2025-04-02 - Last updated in NVD database

Technical Details for CVE-2022-31704

Vulnerability Analysis

This vulnerability stems from improper access control mechanisms within VMware vRealize Log Insight. The broken access control flaw allows unauthenticated remote attackers to bypass security constraints and inject malicious code into sensitive files on the appliance. Once code injection is achieved, attackers can execute arbitrary commands with the privileges of the vRealize Log Insight service, potentially leading to complete system compromise.

The attack can be executed entirely over the network without requiring any authentication credentials, making it particularly dangerous for internet-exposed or poorly segmented deployments. The vulnerability affects the integrity, confidentiality, and availability of the target system, enabling attackers to steal sensitive log data, modify configurations, or disrupt logging operations across the enterprise.

Root Cause

The root cause of CVE-2022-31704 is classified as CWE-284 (Improper Access Control). The vulnerability exists due to insufficient validation and access control enforcement on certain API endpoints or file operations within vRealize Log Insight. This allows unauthenticated users to interact with sensitive system components that should be restricted to authenticated administrators only.

Attack Vector

The attack vector is network-based, requiring no authentication, no user interaction, and no special privileges. An attacker with network access to a vulnerable vRealize Log Insight instance can craft malicious requests to inject code into sensitive files on the appliance. The exploitation chain involves:

1. Identifying a vulnerable vRealize Log Insight instance exposed on the network
2. Sending crafted requests that bypass access control mechanisms
3. Injecting malicious code into sensitive configuration or executable files
4. Triggering execution of the injected code to achieve remote code execution

The vulnerability allows an attacker to chain the broken access control with code injection to achieve full remote code execution on the target appliance. Technical details and exploitation techniques have been documented in public security resources. For detailed technical analysis, refer to the VMware Security Advisory VMSA-2023-0001 and the Packet Storm RCE Exploit documentation.

Detection Methods for CVE-2022-31704

Indicators of Compromise

• Unexpected outbound network connections from vRealize Log Insight appliances
• Unusual modifications to system configuration files or binaries on the appliance
• Anomalous API requests to vRealize Log Insight from untrusted IP addresses
• New or suspicious processes spawned by vRealize Log Insight services
• Evidence of unauthorized file writes to sensitive directories on the appliance

Detection Strategies

• Monitor network traffic for suspicious requests targeting vRealize Log Insight API endpoints
• Implement intrusion detection rules to identify exploitation attempts against CVE-2022-31704
• Review vRealize Log Insight application logs for authentication bypass attempts or unusual access patterns
• Deploy endpoint detection solutions to identify post-exploitation activity on the appliance

Monitoring Recommendations

• Enable detailed logging on vRealize Log Insight and forward logs to a separate SIEM for analysis
• Configure network monitoring to alert on unexpected connections to/from vRealize Log Insight management ports
• Implement file integrity monitoring on the vRealize Log Insight appliance to detect unauthorized modifications
• Regularly audit access to vRealize Log Insight infrastructure and review for anomalous patterns

How to Mitigate CVE-2022-31704

Immediate Actions Required

• Apply the security patch from VMware immediately to all affected vRealize Log Insight instances
• Restrict network access to vRealize Log Insight management interfaces to trusted networks only
• Implement network segmentation to isolate vRealize Log Insight appliances from untrusted networks
• Review appliance logs and system integrity for evidence of prior compromise before patching

Patch Information

VMware has released a security patch addressing CVE-2022-31704 as documented in VMware Security Advisory VMSA-2023-0001. Organizations should update to the latest patched version of vRealize Log Insight as specified in the advisory. The patch corrects the broken access control vulnerability by implementing proper authentication and authorization checks on affected components.

Workarounds

• Implement strict firewall rules to limit access to vRealize Log Insight management ports to authorized administrator IP addresses only
• Deploy a Web Application Firewall (WAF) or reverse proxy in front of vRealize Log Insight to filter malicious requests
• Disable or restrict external network access to vRealize Log Insight until patching can be completed
• Monitor for exploitation attempts using network-based intrusion detection systems while awaiting patch deployment

# Configuration example - Restrict network access via firewall rules
# Block external access to vRealize Log Insight management ports
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
iptables -A INPUT -p tcp --dport 9000 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 9000 -j DROP