CVE-2022-31675: VMware vRealize Operations Auth Bypass

CVE-2022-31675 Overview

CVE-2022-31675 is an authentication bypass vulnerability affecting VMware vRealize Operations. An unauthenticated malicious actor with network access may be able to create a user with administrative privileges, potentially leading to complete compromise of the vRealize Operations environment.

Critical Impact

Unauthenticated attackers can create administrative accounts, bypassing authentication controls entirely and gaining full administrative access to VMware vRealize Operations deployments.

Affected Products

• VMware vRealize Operations

Discovery Timeline

• 2022-08-10 - CVE-2022-31675 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-31675

Vulnerability Analysis

This authentication bypass vulnerability allows unauthenticated remote attackers to circumvent security controls in VMware vRealize Operations. The vulnerability enables the creation of user accounts with administrative privileges without requiring any prior authentication. This type of flaw represents a critical breakdown in access control mechanisms, as it permits attackers to establish persistent access to the target system.

The network-based attack vector means that any attacker with network connectivity to a vulnerable vRealize Operations instance can potentially exploit this vulnerability. The attack requires no user interaction and can be executed with low complexity, making it particularly dangerous for internet-exposed or poorly segmented deployments.

Root Cause

The vulnerability stems from improper access control mechanisms within the VMware vRealize Operations authentication subsystem. The application fails to properly validate authentication state before allowing administrative user creation operations, enabling unauthenticated actors to perform privileged actions.

Attack Vector

The attack can be executed remotely over the network by an unauthenticated attacker. The exploitation flow involves:

1. An attacker identifies a vulnerable VMware vRealize Operations instance accessible over the network
2. The attacker crafts requests to the user creation endpoint without valid authentication credentials
3. Due to the authentication bypass flaw, the system processes the request and creates an administrative user
4. The attacker can then authenticate with the newly created administrative account
5. Full administrative access is achieved, allowing complete control over the vRealize Operations environment

The vulnerability does not require any user interaction, and the attacker does not need any prior privileges or valid credentials to exploit it. Technical details regarding specific exploitation methods can be found in the VMware Security Advisory VMSA-2022-0022.

Detection Methods for CVE-2022-31675

Indicators of Compromise

• Unexpected administrative user accounts appearing in vRealize Operations user management
• Authentication logs showing successful logins from unknown or suspicious administrative accounts
• User creation events in audit logs without corresponding authenticated sessions
• Network traffic to vRealize Operations management interfaces from unauthorized sources

Detection Strategies

• Monitor vRealize Operations audit logs for unauthorized user creation events, particularly those creating administrative accounts
• Implement network-level monitoring to detect suspicious requests to authentication and user management endpoints
• Regularly audit the list of administrative users and compare against known authorized accounts
• Deploy intrusion detection systems (IDS) with signatures for VMware vRealize Operations authentication bypass attempts

Monitoring Recommendations

• Enable verbose logging on vRealize Operations instances to capture detailed authentication and user management events
• Configure SIEM alerts for new administrative user creation events outside of change windows
• Implement network segmentation monitoring to detect unauthorized access attempts to vRealize Operations management interfaces
• Establish baseline user account counts and alert on unexpected changes

How to Mitigate CVE-2022-31675

Immediate Actions Required

• Apply the security patches provided by VMware as referenced in VMSA-2022-0022
• Audit all existing administrative accounts in vRealize Operations and remove any unauthorized users
• Restrict network access to vRealize Operations management interfaces to trusted networks only
• Review authentication logs for evidence of exploitation prior to patching

Patch Information

VMware has released security updates to address this vulnerability. Administrators should consult the VMware Security Advisory VMSA-2022-0022 for specific patch versions and upgrade instructions applicable to their vRealize Operations deployment.

Workarounds

• Implement strict network segmentation to limit access to vRealize Operations management interfaces
• Deploy a web application firewall (WAF) in front of vRealize Operations to filter malicious requests
• Enable enhanced authentication logging to detect exploitation attempts
• Consider temporarily restricting external network access to vRealize Operations until patches can be applied

# Network segmentation example - restrict management access
# Add firewall rules to limit access to vRealize Operations management ports
# Only allow access from trusted management networks

# Example iptables rules (adjust IPs and ports as needed)
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP