CVE-2024-11186: CloudVision Portal Auth Bypass Flaw

CVE-2024-11186 Overview

CVE-2024-11186 is an improper access control vulnerability affecting Arista CloudVision Portal. On affected versions, improper access controls could enable a malicious authenticated user to take broader actions on managed EOS devices than intended. This vulnerability impacts the Arista CloudVision Portal products when run on-premise and does not affect CloudVision as-a-Service deployments.

Critical Impact

This vulnerability allows authenticated attackers to bypass access controls and perform unauthorized administrative actions on managed network devices, potentially compromising the entire network infrastructure managed by CloudVision Portal.

Affected Products

• Arista CloudVision Portal (on-premise deployments)
• Managed EOS devices connected to affected CloudVision Portal instances

Discovery Timeline

• 2025-05-08 - CVE-2024-11186 published to NVD
• 2025-05-12 - Last updated in NVD database

Technical Details for CVE-2024-11186

Vulnerability Analysis

This vulnerability is classified under CWE-287 (Improper Authentication), which encompasses weaknesses in the authentication mechanism that allow attackers to bypass security controls. In the context of CloudVision Portal, the improper access controls fail to adequately restrict an authenticated user's capabilities, enabling them to execute privileged operations on managed EOS network devices beyond their intended authorization level.

The vulnerability is network-exploitable without user interaction, allowing remote authenticated attackers to escalate their privileges and perform unauthorized actions. The potential impact extends beyond the vulnerable component itself, as compromised CloudVision Portal instances can affect the confidentiality, integrity, and availability of all managed EOS devices within the network infrastructure.

Root Cause

The root cause stems from improper access control implementation within the CloudVision Portal's authorization framework. The system fails to properly validate and enforce access boundaries for authenticated users, allowing them to invoke administrative functions and device management operations that should be restricted based on their assigned role or permissions.

Attack Vector

The attack vector for CVE-2024-11186 requires network access and an authenticated session to the CloudVision Portal. An attacker who has obtained valid credentials—either through compromised accounts, social engineering, or insider access—can exploit the improper access controls to escalate privileges.

The exploitation mechanism involves an authenticated user leveraging the broken access control to perform unauthorized operations on managed EOS devices. Since CloudVision Portal serves as a centralized management platform for Arista network infrastructure, successful exploitation could allow attackers to:

• Modify device configurations across the managed network
• Access sensitive network telemetry and configuration data
• Disrupt network operations by making unauthorized changes
• Potentially pivot to other network segments through compromised devices

For detailed technical information, refer to the Arista Security Advisory #0114.

Detection Methods for CVE-2024-11186

Indicators of Compromise

• Unusual API calls or management operations from user accounts with limited permissions
• Unexpected configuration changes on managed EOS devices
• Authentication logs showing users accessing resources beyond their normal scope
• Anomalous activity patterns in CloudVision Portal audit logs

Detection Strategies

• Enable and monitor comprehensive audit logging on CloudVision Portal for all user actions
• Implement alerting on privilege escalation attempts or unauthorized device management operations
• Deploy network monitoring solutions to detect unexpected configuration changes on EOS devices
• Review CloudVision Portal access logs for users performing actions inconsistent with their assigned roles

Monitoring Recommendations

• Correlate CloudVision Portal authentication events with subsequent device management activities
• Establish baseline user behavior profiles and alert on deviations
• Monitor for bulk configuration changes or access patterns that suggest reconnaissance activity
• Integrate CloudVision Portal logs with SIEM solutions for centralized threat detection

How to Mitigate CVE-2024-11186

Immediate Actions Required

• Review the Arista Security Advisory #0114 for vendor-recommended remediation steps
• Audit current user accounts and permissions in CloudVision Portal, removing unnecessary access
• Implement network segmentation to limit access to CloudVision Portal management interfaces
• Enable multi-factor authentication for all CloudVision Portal user accounts
• Consider migrating to CloudVision as-a-Service, which is not affected by this vulnerability

Patch Information

Arista has released security guidance for this vulnerability. Organizations should consult the Arista Security Advisory #0114 for specific patch versions and upgrade instructions for CloudVision Portal deployments.

Workarounds

• Restrict network access to CloudVision Portal to trusted management networks only
• Implement strict role-based access controls and regularly audit user permissions
• Deploy additional monitoring and alerting on CloudVision Portal administrative actions
• Consider placing CloudVision Portal behind a VPN or zero-trust network access solution
• Disable or restrict accounts that do not require full administrative access to managed devices