CVE-2024-38813: VMware Cloud Foundation Escalation Flaw

CVE-2024-38813 Overview

CVE-2024-38813 is a critical privilege escalation vulnerability affecting VMware vCenter Server and VMware Cloud Foundation. A malicious actor with network access to vCenter Server may trigger this vulnerability to escalate privileges to root by sending a specially crafted network packet. This vulnerability requires no authentication and can be exploited remotely, making it particularly dangerous for organizations running vulnerable vCenter Server deployments.

Critical Impact

This vulnerability enables unauthenticated remote attackers to escalate privileges to root on affected vCenter Server systems, potentially leading to complete infrastructure compromise. This vulnerability has been confirmed as actively exploited in the wild and is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Affected Products

• VMware vCenter Server 7.0 (all versions through Update 3s)
• VMware vCenter Server 8.0 (all versions through Update 2d)
• VMware Cloud Foundation (affected versions)

Discovery Timeline

• September 17, 2024 - CVE-2024-38813 published to NVD
• October 31, 2025 - Last updated in NVD database

Technical Details for CVE-2024-38813

Vulnerability Analysis

CVE-2024-38813 represents a privilege escalation vulnerability in VMware vCenter Server that allows an unauthenticated attacker with network access to escalate privileges to root. The attack can be executed remotely without requiring any user interaction or prior authentication, making it particularly severe. Organizations using vCenter Server as their centralized management platform for VMware environments face significant risk, as successful exploitation could grant attackers complete control over the virtualization infrastructure.

The vulnerability is associated with CWE-250 (Execution with Unnecessary Privileges) and CWE-273 (Improper Check for Dropped Privileges), indicating issues with how the application handles privilege boundaries and privilege dropping mechanisms. This suggests the vulnerability may stem from improper handling of privilege transitions or insufficient validation when processing network packets that trigger privileged operations.

Root Cause

The root cause of CVE-2024-38813 relates to improper privilege management within the vCenter Server application. The vulnerability involves CWE-250 (Execution with Unnecessary Privileges), where the application runs with elevated privileges when it should not, and CWE-273 (Improper Check for Dropped Privileges), indicating that the application fails to properly verify that privileges have been appropriately dropped before performing sensitive operations. When processing specially crafted network packets, the application fails to properly validate or restrict privilege transitions, allowing an attacker to leverage this weakness to escalate from network access to root-level privileges.

Attack Vector

The attack is network-based and requires the attacker to have network connectivity to the vCenter Server instance. The exploitation process involves sending specially crafted network packets to the vulnerable vCenter Server. Due to the improper privilege handling, these malicious packets can trigger a condition that allows the attacker to escalate from an unauthenticated network user to root privileges on the underlying system.

The attack is particularly concerning because it requires no authentication (PR:N), no user interaction (UI:N), and has low attack complexity (AC:L), meaning exploitation is straightforward once network access is established. Successful exploitation results in complete compromise of confidentiality, integrity, and availability of the affected system.

Detection Methods for CVE-2024-38813

Indicators of Compromise

• Unexpected root-level processes or services running on vCenter Server systems
• Anomalous network traffic patterns directed at vCenter Server management interfaces
• Suspicious authentication logs showing privilege changes without corresponding user actions
• Unexpected configuration changes or new administrative accounts on vCenter infrastructure

Detection Strategies

• Deploy network intrusion detection systems (NIDS) to monitor traffic to vCenter Server management ports for anomalous packet patterns
• Implement behavioral analysis to detect unexpected privilege escalation events on vCenter Server hosts
• Enable comprehensive audit logging on vCenter Server and forward logs to a SIEM for correlation analysis
• Monitor for unauthorized access attempts and unusual administrative activities in vCenter Server audit logs

Monitoring Recommendations

• Continuously monitor vCenter Server system logs for evidence of privilege escalation attempts
• Implement network segmentation monitoring to detect unauthorized access to vCenter management networks
• Configure alerts for any root-level process creation or privilege changes on vCenter Server systems
• Review vCenter Server access patterns and compare against established baselines for anomaly detection

How to Mitigate CVE-2024-38813

Immediate Actions Required

• Apply the security patches provided by Broadcom immediately to all affected vCenter Server and Cloud Foundation deployments
• Restrict network access to vCenter Server management interfaces to authorized administrative networks only
• Implement network segmentation to isolate vCenter Server from untrusted network segments
• Monitor for indicators of compromise, particularly given the confirmed active exploitation of this vulnerability

Patch Information

Broadcom has released security patches addressing this vulnerability. Organizations should consult the Broadcom Security Advisory 24968 for detailed patching instructions and updated software versions. Given that this vulnerability is listed in the CISA Known Exploited Vulnerabilities Catalog, federal agencies and critical infrastructure organizations may be subject to mandatory remediation timelines.

For vCenter Server 7.0 environments, upgrade to the latest patched version beyond Update 3s. For vCenter Server 8.0 environments, upgrade to the latest patched version beyond Update 2d. VMware Cloud Foundation customers should follow Broadcom's guidance for their specific deployment version.

Workarounds

• Implement strict firewall rules to limit network access to vCenter Server only from trusted management workstations
• Consider temporarily disabling external network access to vCenter Server if patching cannot be performed immediately
• Deploy additional network monitoring and intrusion detection capabilities to identify potential exploitation attempts
• Ensure network-level access controls are enforced to prevent unauthorized access from untrusted network zones

# Example: Restrict vCenter Server management access using iptables
# Allow only from trusted management network (adjust IP range as needed)
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Verify current firewall rules
iptables -L -n -v