CVE-2022-33664 in Azure Site Recovery VMWare to Azure
Summary
by MITRE • 07/13/2022
Azure Site Recovery Elevation of Privilege Vulnerability. This CVE ID is unique from CVE-2022-30181, CVE-2022-33641, CVE-2022-33642, CVE-2022-33643, CVE-2022-33650, CVE-2022-33651, CVE-2022-33652, CVE-2022-33653, CVE-2022-33654, CVE-2022-33655, CVE-2022-33656, CVE-2022-33657, CVE-2022-33658, CVE-2022-33659, CVE-2022-33660, CVE-2022-33661, CVE-2022-33662, CVE-2022-33663, CVE-2022-33665, CVE-2022-33666, CVE-2022-33667, CVE-2022-33668, CVE-2022-33669, CVE-2022-33671, CVE-2022-33672, CVE-2022-33673, CVE-2022-33674, CVE-2022-33675, CVE-2022-33677.
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Analysis
by VulDB Data Team • 07/23/2022
The Azure Site Recovery service presents a critical elevation of privilege vulnerability that allows authenticated attackers to escalate their access rights within the Azure environment. This vulnerability specifically affects the recovery services vault functionality and represents a distinct security flaw from other related CVEs in the same year, emphasizing its unique technical characteristics. The flaw exists within the authorization mechanisms that govern user access to recovery services vault resources, creating a pathway for malicious actors to gain unauthorized administrative privileges. This vulnerability is particularly concerning as it operates within Microsoft's cloud infrastructure where legitimate users may already possess some level of access, making the elevation of privilege more subtle and harder to detect.
The technical implementation of this vulnerability stems from improper access control validation within the Azure Site Recovery service components. Attackers can exploit this weakness by crafting specific requests that bypass normal authorization checks, allowing them to perform operations that should be restricted to users with higher privileges. The flaw likely resides in how the service validates user credentials and permissions when processing recovery operations, potentially through insufficient input validation or flawed privilege checking routines. This type of vulnerability maps directly to CWE-284 which describes improper access control issues, and aligns with ATT&CK technique T1078 for valid accounts and privilege escalation. The vulnerability may manifest when the system fails to properly verify that a user possesses the necessary permissions before executing sensitive recovery operations, enabling attackers to manipulate the authorization flow.
The operational impact of this vulnerability extends beyond simple privilege escalation, potentially allowing attackers to compromise entire recovery environments and access sensitive data. Once escalated, attackers could access backup data, modify recovery policies, or even delete critical recovery services vaults, leading to significant business disruption and potential data loss. The attack surface is particularly broad given that Azure Site Recovery is commonly deployed for disaster recovery scenarios, meaning that organizations may have multiple recovery vaults across different regions and subscriptions. This vulnerability could enable attackers to target critical backup infrastructure, potentially preventing legitimate recovery operations during actual disaster scenarios. Organizations using Azure Site Recovery for mission-critical applications face the risk of complete operational paralysis if attackers exploit this vulnerability to disable or manipulate recovery services.
Mitigation strategies for this vulnerability require immediate attention from Azure administrators and security teams. Microsoft has released patches and updates to address this specific flaw, and organizations must apply these updates promptly to prevent exploitation. Network segmentation and monitoring should be enhanced to detect unusual access patterns to recovery vaults, particularly around privilege escalation events. Implementing principle of least privilege access controls and regular auditing of recovery vault permissions can help reduce the impact if exploitation occurs. Security teams should also consider implementing additional monitoring for Azure Site Recovery service activities, as this vulnerability may not trigger standard security alerts. The remediation process should include comprehensive testing of updated configurations to ensure that legitimate user access continues to function properly while preventing unauthorized escalation attempts. Organizations should also review their backup and recovery procedures to ensure that alternative recovery mechanisms exist in case of compromise. Regular security assessments and penetration testing of Azure environments can help identify similar vulnerabilities in other services and ensure overall security posture remains strong against evolving threats.