CVE-2022-31656: VMware Identity Manager Auth Bypass Flaw

CVE-2022-31656 Overview

CVE-2022-31656 is a critical authentication bypass vulnerability affecting VMware Workspace ONE Access, Identity Manager, and vRealize Automation products. The vulnerability specifically impacts local domain users and allows a malicious actor with network access to the user interface to obtain administrative access without the need to authenticate. This vulnerability poses a severe risk to organizations using these VMware identity and access management solutions, as successful exploitation could lead to complete system compromise.

Critical Impact

Unauthenticated attackers with network access to the UI can gain administrative privileges, potentially compromising enterprise identity management infrastructure and enabling lateral movement across the organization.

Affected Products

• VMware Identity Manager versions 3.3.4, 3.3.5, 3.3.6
• VMware Workspace ONE Access versions 21.08.0.0, 21.08.0.1
• VMware Access Connector versions 21.08.0.0, 21.08.0.1, 22.05
• VMware Identity Manager Connector versions 3.3.4, 3.3.5, 3.3.6, 19.03.0.1
• Deployments on Linux and Windows operating systems

Discovery Timeline

• 2022-08-05 - CVE-2022-31656 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-31656

Vulnerability Analysis

This authentication bypass vulnerability allows attackers to circumvent the normal authentication mechanisms in VMware's identity management products. The flaw exists in how the application handles authentication requests for local domain users, enabling unauthorized actors to bypass login requirements entirely. Once exploited, an attacker gains administrative-level access to the affected system, which could be leveraged to access sensitive user credentials, modify access policies, create rogue administrative accounts, or pivot to other connected systems within the enterprise infrastructure.

The vulnerability is particularly dangerous because it requires no prior authentication or special privileges—only network access to the management interface. Given that VMware Workspace ONE Access and Identity Manager are often deployed as central authentication hubs for enterprise applications, compromise of these systems can have cascading effects across the entire organization.

Root Cause

The root cause of CVE-2022-31656 stems from an authentication bypass flaw in the handling of local domain user authentication. The vulnerability allows the authentication process to be circumvented when specific conditions are met, though VMware has not publicly disclosed the exact technical mechanism to prevent exploitation. The flaw indicates insufficient validation of authentication requests within the application's access control logic.

Attack Vector

The attack is network-based and targets the web user interface of affected VMware products. An attacker positioned on the same network segment as the management interface, or with access via exposed internet-facing deployments, can craft requests that bypass authentication controls. The attack does not require user interaction or any prior privileges on the target system.

The exploitation mechanism targets the authentication workflow for local domain users specifically. While the precise technical details have been withheld, the attack path involves sending specially crafted requests to the authentication endpoint that cause the system to grant administrative access without proper credential validation. For detailed technical information, refer to the VMware Security Advisory VMSA-2022-0021.

Detection Methods for CVE-2022-31656

Indicators of Compromise

• Unexpected administrative sessions or login events without corresponding valid authentication attempts in application logs
• Creation of new administrative accounts without authorization from legitimate administrators
• Anomalous access patterns to the management UI from unexpected source IP addresses
• Authentication log entries showing successful logins for local domain users without proper credential exchanges

Detection Strategies

• Monitor VMware Workspace ONE Access and Identity Manager logs for authentication anomalies, particularly successful logins without preceding authentication challenges
• Implement network intrusion detection rules to identify suspicious traffic patterns targeting the management interface
• Review audit logs for unexpected administrative actions or privilege escalations
• Deploy SIEM correlation rules to detect authentication bypass attempts based on log patterns

Monitoring Recommendations

• Enable detailed authentication logging on all VMware identity management products
• Configure alerts for new administrative account creation or privilege modifications
• Monitor network traffic to management interfaces for unusual request patterns
• Establish baseline behavioral analytics for administrative access and alert on deviations

How to Mitigate CVE-2022-31656

Immediate Actions Required

• Apply VMware security patches immediately as outlined in VMSA-2022-0021
• Restrict network access to management interfaces using firewall rules or network segmentation
• Audit existing administrative accounts and remove any unauthorized entries
• Review recent authentication and access logs for signs of exploitation

Patch Information

VMware has released security patches to address CVE-2022-31656. Organizations should immediately consult the VMware Security Advisory VMSA-2022-0021 for specific patch versions and installation instructions. Patching is the only complete remediation for this vulnerability.

Workarounds

• Implement strict network segmentation to limit access to the management UI to trusted administrator networks only
• Configure firewall rules to block external access to VMware Workspace ONE Access and Identity Manager interfaces
• Consider deploying a VPN or jump host requirement for administrative access to affected systems
• Enable multi-factor authentication where possible as an additional layer of protection

# Example: Restrict management interface access using iptables
# Allow access only from trusted admin subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Verify applied rules
iptables -L -n -v