CVE-2022-22955: VMware Identity Manager Auth Bypass Flaw

CVE-2022-22955 Overview

CVE-2022-22955 is an authentication bypass vulnerability affecting VMware Workspace ONE Access and related VMware identity management products. This vulnerability exists within the OAuth2 ACS (Assertion Consumer Service) framework, where exposed endpoints in the authentication mechanism allow malicious actors to bypass authentication entirely. A successful exploit enables attackers to execute any operation without proper authorization, potentially leading to complete system compromise.

Critical Impact

This authentication bypass vulnerability allows unauthenticated remote attackers to completely bypass security controls and execute arbitrary operations on affected VMware identity management systems, potentially compromising enterprise authentication infrastructure.

Affected Products

• VMware Workspace ONE Access versions 20.10.0.0, 20.10.0.1, 21.08.0.0, 21.08.0.1
• VMware Identity Manager versions 3.3.3, 3.3.4, 3.3.5, 3.3.6
• VMware vRealize Automation version 7.6 and related versions

Discovery Timeline

• April 13, 2022 - CVE-2022-22955 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2022-22955

Vulnerability Analysis

This authentication bypass vulnerability resides in the OAuth2 ACS framework implementation within VMware Workspace ONE Access. The core issue stems from improperly secured endpoints in the authentication framework that are inadvertently exposed to external access. When these endpoints are accessed without proper authentication controls, attackers can manipulate the OAuth2 authentication flow to bypass credential validation entirely.

The vulnerability is particularly severe because VMware Workspace ONE Access serves as a centralized identity provider for enterprise environments. Organizations use this platform to manage single sign-on (SSO), multi-factor authentication, and access policies across their application ecosystems. A successful authentication bypass at this level can cascade into unauthorized access across all integrated applications and services.

The network-accessible nature of this vulnerability means that any attacker with network connectivity to the affected VMware appliance can attempt exploitation without requiring any prior authentication or user interaction.

Root Cause

The root cause of CVE-2022-22955 lies in the improper exposure of authentication endpoints within the OAuth2 ACS framework. These endpoints were designed to handle assertion consumer service operations but lacked adequate access controls to prevent unauthorized use. The framework failed to properly validate authentication state before allowing operations to proceed, enabling attackers to interact with these endpoints directly and bypass the intended authentication sequence.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no privileges or user interaction. An attacker can exploit this vulnerability by:

1. Identifying exposed OAuth2 ACS endpoints on the target VMware Workspace ONE Access instance
2. Crafting malicious requests that interact with these endpoints while bypassing the normal authentication flow
3. Leveraging the bypassed authentication to execute privileged operations within the identity management platform

Due to the nature of this vulnerability being in exposed authentication endpoints, detailed exploitation methodology is available in the vendor security advisory. The attack can be executed remotely against any network-accessible VMware Workspace ONE Access deployment.

Detection Methods for CVE-2022-22955

Indicators of Compromise

• Unusual access patterns to OAuth2 ACS endpoints without preceding authentication events
• Authentication logs showing successful operations without corresponding credential validation
• Anomalous API calls to the identity management platform from unexpected IP addresses
• Unexpected administrative actions performed without legitimate user sessions

Detection Strategies

• Monitor access logs for direct requests to OAuth2 ACS framework endpoints from external sources
• Implement network intrusion detection rules to identify suspicious traffic patterns targeting Workspace ONE Access
• Enable enhanced audit logging on VMware Workspace ONE Access to capture all authentication-related events
• Deploy web application firewall rules to detect and block malformed OAuth2 requests

Monitoring Recommendations

• Establish baseline authentication patterns for Workspace ONE Access and alert on deviations
• Configure SIEM correlation rules to detect authentication bypass attempts
• Monitor for new administrative accounts or privilege escalation following suspicious endpoint access
• Implement continuous vulnerability scanning to identify unpatched VMware identity management systems

How to Mitigate CVE-2022-22955

Immediate Actions Required

• Apply the security patches provided in VMware Security Advisory VMSA-2022-0011 immediately
• Restrict network access to VMware Workspace ONE Access administrative interfaces
• Review audit logs for evidence of prior exploitation attempts
• Temporarily restrict external access to affected systems until patching is complete

Patch Information

VMware has released security patches addressing this vulnerability in VMware Security Advisory VMSA-2022-0011. Organizations should update to the latest patched versions of VMware Workspace ONE Access, VMware Identity Manager, and VMware vRealize Automation as specified in the advisory.

Workarounds

• Implement network segmentation to limit exposure of VMware identity management systems to trusted networks only
• Deploy a web application firewall (WAF) in front of Workspace ONE Access to filter malicious requests
• Enable additional authentication controls at the network perimeter while awaiting patch deployment
• Consider temporarily disabling non-essential OAuth2 integrations until the vulnerability is remediated

# Network access restriction example for VMware appliance
# Limit access to management interfaces to specific IP ranges
iptables -A INPUT -p tcp --dport 443 -s trusted_network_cidr -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP