CVE-2022-33675: Azure Site Recovery Privilege Escalation

CVE-2022-33675 Overview

CVE-2022-33675 is an Elevation of Privilege vulnerability affecting Microsoft Azure Site Recovery VMware to Azure. This local attack vector vulnerability allows an authenticated attacker with low privileges to escalate their permissions on the affected system, potentially gaining complete control over the Azure Site Recovery infrastructure.

Critical Impact

Successful exploitation enables attackers to elevate privileges locally, achieving high impact on confidentiality, integrity, and availability of the affected Azure Site Recovery deployment.

Affected Products

• Microsoft Azure Site Recovery VMware to Azure

Discovery Timeline

• July 12, 2022 - CVE-2022-33675 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2022-33675

Vulnerability Analysis

This elevation of privilege vulnerability exists within the Azure Site Recovery VMware to Azure component. The vulnerability requires local access to the target system and low-privilege authentication. Once an attacker gains initial access to a system running the vulnerable Azure Site Recovery components, they can exploit this flaw to escalate their privileges.

The exploitation does not require user interaction, making it particularly dangerous in environments where attackers may have already established a foothold through other means. The vulnerability affects the confidentiality, integrity, and availability of the system, as successful exploitation grants the attacker elevated permissions that can be used to access sensitive data, modify system configurations, or disrupt disaster recovery operations.

Root Cause

The specific technical root cause has not been publicly disclosed by Microsoft (classified as NVD-CWE-noinfo). The vulnerability exists within the privilege management mechanisms of the Azure Site Recovery VMware to Azure component, allowing improper elevation of user privileges beyond their authorized scope.

Attack Vector

The attack vector is local, meaning an attacker must have local access to the target system. The attack complexity is low, requiring only low-level privileges to initiate the exploitation. The attacker does not need to trick a user into performing any action—the vulnerability can be exploited directly once the attacker has established local access.

The attacker would typically:

1. Gain initial access to a system running Azure Site Recovery VMware to Azure
2. Authenticate with low-privilege credentials
3. Exploit the privilege escalation vulnerability
4. Obtain elevated privileges on the affected system

Detection Methods for CVE-2022-33675

Indicators of Compromise

• Unexpected privilege escalation events associated with Azure Site Recovery processes
• Anomalous authentication attempts or unusual account activity on Azure Site Recovery infrastructure
• Unauthorized changes to Azure Site Recovery configurations or service accounts

Detection Strategies

• Monitor Windows Security Event Logs for privilege escalation events (Event IDs 4672, 4673, 4674)
• Implement endpoint detection rules for suspicious process behavior associated with Azure Site Recovery components
• Enable Azure Defender for cloud workloads to detect anomalous activity in disaster recovery infrastructure

Monitoring Recommendations

• Configure alerting for any unauthorized access attempts to Azure Site Recovery management interfaces
• Establish baseline behavior for Azure Site Recovery processes and alert on deviations
• Implement continuous monitoring of user privilege changes on systems running Azure Site Recovery

How to Mitigate CVE-2022-33675

Immediate Actions Required

• Apply the Microsoft security update addressing CVE-2022-33675 immediately
• Audit all accounts with access to Azure Site Recovery infrastructure and enforce least-privilege principles
• Review access logs for any suspicious activity that may indicate prior exploitation attempts

Patch Information

Microsoft has released a security update to address this vulnerability. Organizations should apply the patch as soon as possible to protect their Azure Site Recovery deployments. For detailed patch information, refer to the Microsoft Security Update Guide for CVE-2022-33675.

Workarounds

• Restrict local access to systems running Azure Site Recovery to only essential personnel
• Implement network segmentation to isolate Azure Site Recovery infrastructure from less trusted network segments
• Enable enhanced logging and monitoring on Azure Site Recovery systems to detect potential exploitation attempts before patches can be applied

# Verify Azure Site Recovery component version (Windows)
# Check installed version against Microsoft security advisory
Get-WmiObject -Class Win32_Product | Where-Object { $_.Name -like "*Azure Site Recovery*" } | Select-Object Name, Version