CVE-2023-34063: VMware Aria Automation Auth Bypass Flaw

CVE-2023-34063 Overview

CVE-2023-34063 is a Missing Access Control vulnerability (CWE-862) affecting VMware Aria Automation, a cloud management platform used for automating infrastructure provisioning and application deployment across hybrid cloud environments. This vulnerability allows an authenticated malicious actor to bypass access control mechanisms, potentially gaining unauthorized access to remote organizations and workflows within the Aria Automation environment.

The vulnerability stems from improper access control enforcement, enabling authenticated users to access resources and perform actions beyond their authorized scope. Given the critical role VMware Aria Automation plays in enterprise infrastructure management, exploitation of this vulnerability could lead to significant security breaches affecting multiple cloud environments and automated workflows.

Critical Impact

Authenticated attackers can exploit this vulnerability to gain unauthorized access to remote organizations and workflows, potentially compromising multi-tenant environments and automated infrastructure provisioning processes.

Affected Products

• VMware Aria Automation versions 8.11.0 through 8.14.1
• VMware Cloud Foundation 4.0
• VMware Cloud Foundation 5.0

Discovery Timeline

• 2024-01-16 - CVE-2023-34063 published to NVD
• 2025-06-20 - Last updated in NVD database

Technical Details for CVE-2023-34063

Vulnerability Analysis

This vulnerability is classified as Missing Authorization (CWE-862), which occurs when software fails to perform an authorization check when an actor attempts to access a resource or perform an action. In the context of VMware Aria Automation, this manifests as inadequate validation of user permissions when accessing organizational resources and workflows.

VMware Aria Automation manages multi-tenant environments where different organizations maintain separate resources, workflows, and automation pipelines. The missing access control allows authenticated users from one organization to potentially traverse organizational boundaries and access resources belonging to other tenants. This type of vulnerability is particularly dangerous in cloud management platforms where strict tenant isolation is a fundamental security requirement.

The attack can be executed over the network and requires only low-privilege authentication, meaning any user with basic access credentials could potentially exploit this vulnerability to escalate their access across organizational boundaries.

Root Cause

The root cause of CVE-2023-34063 lies in insufficient authorization checks within VMware Aria Automation's access control implementation. The application fails to properly validate whether an authenticated user has the appropriate permissions to access specific organizations or execute certain workflows. This missing validation allows authenticated users to bypass intended access restrictions and interact with resources outside their authorized scope.

The vulnerability affects the authorization layer that should enforce tenant isolation and resource access policies, resulting in a breakdown of the multi-tenant security model that cloud management platforms rely upon.

Attack Vector

The attack vector for this vulnerability is network-based, requiring an authenticated user to interact with the Aria Automation platform. The exploitation path involves:

1. An attacker first authenticates to the VMware Aria Automation platform using valid credentials (even low-privileged accounts)
2. The attacker then crafts requests targeting resources belonging to other organizations or workflows they should not have access to
3. Due to the missing access control checks, the application processes these requests without verifying organizational boundaries
4. The attacker gains unauthorized access to remote organizations and their associated workflows, potentially enabling data exfiltration, modification of automated processes, or privilege escalation within the target organization

The vulnerability does not require user interaction and can be exploited with low attack complexity, making it a significant threat to multi-tenant Aria Automation deployments.

Detection Methods for CVE-2023-34063

Indicators of Compromise

• Unusual cross-organization API calls or resource access attempts in Aria Automation audit logs
• Authentication events followed by access to organizations or workflows outside the user's normal scope
• Anomalous workflow execution patterns, particularly workflows triggered by users from different organizations
• Unexpected changes to automation policies or workflow configurations in tenant environments

Detection Strategies

• Enable comprehensive audit logging in VMware Aria Automation and monitor for cross-tenant access attempts
• Implement SIEM rules to correlate user authentication events with subsequent resource access patterns
• Deploy user behavior analytics (UBA) to detect anomalous access to organizations or workflows outside normal user patterns
• Review Aria Automation access logs for requests that bypass expected organizational boundaries

Monitoring Recommendations

• Configure real-time alerting for any cross-organization resource access attempts
• Monitor API endpoint access patterns for authenticated users attempting to reach unauthorized tenant resources
• Implement periodic access control audits to verify proper organizational isolation
• Enable detailed logging for workflow execution and trigger events across all organizations

How to Mitigate CVE-2023-34063

Immediate Actions Required

• Apply the security patches provided by VMware as outlined in VMware Security Advisory VMSA-2024-0001
• Review and audit current user access permissions across all organizations in Aria Automation
• Implement network segmentation to limit exposure of the Aria Automation management interface
• Enable enhanced audit logging to detect any potential exploitation attempts

Patch Information

VMware has released security patches to address this vulnerability. Organizations should upgrade to patched versions of VMware Aria Automation as specified in the VMware Security Advisory VMSA-2024-0001. For VMware Cloud Foundation deployments, follow the corresponding upgrade paths documented in the advisory.

Administrators should prioritize patching given the network-accessible nature of this vulnerability and the potential for authenticated users to gain unauthorized cross-tenant access. Testing patches in a non-production environment before deployment is recommended to ensure compatibility with existing automation workflows.

Workarounds

• Implement strict network access controls to limit which users and systems can reach the Aria Automation management interface
• Apply the principle of least privilege by reviewing and restricting user accounts to only necessary permissions
• Enable multi-factor authentication (MFA) for all Aria Automation user accounts to reduce the risk of credential compromise
• Consider temporarily disabling cross-organization features if they are not business-critical until patches can be applied

# Configuration example - Network restriction for Aria Automation access
# Implement firewall rules to restrict management interface access
# Example iptables rules to limit access to trusted management networks only

# Allow access from trusted management subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
# Block all other access to Aria Automation management port
iptables -A INPUT -p tcp --dport 443 -j DROP