CVE-2022-22956 Overview
VMware Workspace ONE Access contains an authentication bypass vulnerability in the OAuth2 ACS (Access Control Services) framework. A malicious actor may bypass the authentication mechanism and execute any operation due to exposed endpoints in the authentication framework. This vulnerability, along with CVE-2022-22955, allows attackers to completely circumvent authentication controls, potentially leading to full system compromise.
Critical Impact
Unauthenticated attackers can bypass authentication controls in VMware Workspace ONE Access and execute arbitrary operations with elevated privileges, potentially compromising the entire identity management infrastructure.
Affected Products
- VMware Workspace ONE Access versions 20.10.0.0, 20.10.0.1, 21.08.0.0, and 21.08.0.1
- VMware Identity Manager versions 3.3.3, 3.3.4, 3.3.5, and 3.3.6
- VMware vRealize Automation version 7.6 and related versions
Discovery Timeline
- April 13, 2022 - CVE-2022-22956 published to NVD
- November 21, 2024 - Last updated in NVD database
Technical Details for CVE-2022-22956
Vulnerability Analysis
This authentication bypass vulnerability (CWE-287: Improper Authentication) resides within the OAuth2 ACS framework of VMware Workspace ONE Access. The vulnerability stems from improperly exposed endpoints within the authentication framework that fail to enforce proper authentication checks before processing requests. Attackers can exploit these exposed endpoints to bypass the authentication mechanism entirely, allowing them to execute privileged operations without valid credentials.
The network-accessible nature of this vulnerability means that any attacker with network access to the affected VMware instance can potentially exploit it without requiring any prior authentication or user interaction. The exposed endpoints in the OAuth2 ACS framework process incoming requests without properly validating the authentication state, creating a direct path for unauthorized access.
Root Cause
The root cause of CVE-2022-22956 lies in the improper implementation of authentication controls within the OAuth2 ACS framework. Specific endpoints within the authentication framework are exposed and accessible without requiring proper authentication validation. This architectural flaw allows incoming requests to these endpoints to be processed as if they originated from authenticated users, bypassing the normal authentication flow that should protect these sensitive operations.
Attack Vector
The attack vector for this vulnerability is network-based, requiring no authentication, no user interaction, and low complexity to exploit. An attacker can craft malicious requests targeting the exposed OAuth2 ACS endpoints to bypass authentication controls.
The exploitation flow typically involves:
- Identifying exposed endpoints in the OAuth2 ACS framework
- Crafting requests that target these unprotected endpoints
- Bypassing the authentication mechanism to gain unauthorized access
- Executing privileged operations on the affected system
Technical details and proof-of-concept information are available through Packet Storm Security.
Detection Methods for CVE-2022-22956
Indicators of Compromise
- Unusual authentication requests to OAuth2 ACS endpoints from unexpected sources
- Authentication events that occur without corresponding login attempts
- Anomalous API calls or operations executed by sessions that bypassed normal authentication
- Log entries showing access to protected resources without valid authentication tokens
Detection Strategies
- Monitor web server access logs for requests targeting OAuth2 ACS endpoints with unusual patterns or from unexpected IP addresses
- Implement anomaly detection for authentication-related endpoints to identify bypass attempts
- Configure alerting for successful operations that lack corresponding authentication events
- Deploy network intrusion detection signatures targeting known exploitation patterns for this vulnerability
Monitoring Recommendations
- Enable verbose logging on VMware Workspace ONE Access and Identity Manager components
- Implement SIEM correlation rules to detect authentication bypass patterns
- Monitor for indicators of lateral movement following potential exploitation
- Review authentication logs regularly for anomalous access patterns to sensitive endpoints
How to Mitigate CVE-2022-22956
Immediate Actions Required
- Apply VMware security patches immediately as documented in VMSA-2022-0011
- Restrict network access to VMware Workspace ONE Access and Identity Manager to trusted networks only
- Implement additional network segmentation to isolate identity management infrastructure
- Audit existing systems for signs of prior exploitation before patching
Patch Information
VMware has released security patches addressing this vulnerability in VMSA-2022-0011. Organizations should immediately upgrade to the latest patched versions of:
- VMware Workspace ONE Access
- VMware Identity Manager
- VMware vRealize Automation
Review the official VMware Security Advisory VMSA-2022-0011 for specific version details and patch downloads.
Workarounds
- Implement strict network access controls limiting connectivity to OAuth2 ACS endpoints
- Deploy web application firewall rules to filter suspicious requests to authentication endpoints
- Enable enhanced monitoring and alerting on affected systems until patches can be applied
- Consider temporarily disabling external access to affected VMware components if feasible
# Example network restriction using iptables (adjust IP ranges as needed)
# Restrict access to VMware Workspace ONE Access ports
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
