CVE-2021-34510 in Windows
Summary
by MITRE • 07/15/2021
Storage Spaces Controller Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-33751, CVE-2021-34460, CVE-2021-34512, CVE-2021-34513.
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Analysis
by VulDB Data Team • 07/17/2021
The Storage Spaces Controller Elevation of Privilege Vulnerability identified as CVE-2021-34510 represents a critical security flaw within Microsoft Windows operating systems that allows unauthorized users to escalate their privileges from standard user level to system administrator level. This vulnerability specifically affects the Storage Spaces Controller service component that manages storage pools and virtual disks within Windows environments. The flaw stems from improper access control mechanisms within the storage management subsystem, creating a pathway for malicious actors to gain elevated privileges without proper authentication or authorization. The vulnerability impacts multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it particularly concerning for enterprise environments where storage management services are commonly deployed. According to CWE-276, this vulnerability maps directly to improper privilege management, where the system fails to properly enforce access controls and authorization checks during storage space operations. The ATT&CK framework categorizes this under privilege escalation techniques, specifically leveraging Windows storage management services to achieve system-level access. The technical implementation involves a flaw in the Storage Spaces Controller service where it fails to validate the security context of incoming requests, allowing local users to manipulate storage space configurations and subsequently gain elevated privileges.
The operational impact of CVE-2021-34510 extends beyond simple privilege escalation, as it enables attackers to gain full control over affected systems and potentially compromise entire network infrastructures. Once an attacker successfully exploits this vulnerability, they can modify storage configurations, access sensitive data stored on virtual disks, and potentially establish persistence mechanisms within the storage management framework. The vulnerability's exploitation typically requires local access to the target system, making it particularly dangerous in environments where physical or remote access is not properly restricted. Attackers can leverage this vulnerability to perform lateral movement within networks where storage spaces are shared or accessed by multiple systems. The impact on enterprise security is significant as storage spaces often contain critical business data, system recovery points, and backup information that can be leveraged for further attacks or data exfiltration. Organizations with robust network segmentation may still be vulnerable if storage management services are accessible from less secure network segments, highlighting the importance of comprehensive security controls.
Mitigation strategies for CVE-2021-34510 should include immediate deployment of Microsoft security patches and updates to address the privilege escalation flaw in Storage Spaces Controller services. System administrators should implement the principle of least privilege by restricting access to storage management services and ensuring that only authorized personnel can perform storage space configurations. Network segmentation and firewall rules should be configured to limit access to storage management interfaces and services, particularly those running on standard ports used by storage space controllers. Monitoring and logging should be enhanced to detect unusual storage space configuration changes or unauthorized access attempts to storage management services. The vulnerability aligns with ATT&CK technique T1068, which covers local privilege escalation through service manipulation, and organizations should implement security controls that monitor for suspicious service configuration changes. Additionally, implementing endpoint detection and response solutions can help identify exploitation attempts by monitoring for anomalous behavior in storage space controller processes. Regular security assessments and vulnerability scanning should be conducted to ensure that all systems have been properly patched and that storage management services are properly configured with appropriate access controls. Organizations should also consider implementing privileged access management solutions to further reduce the attack surface and control access to critical storage management functions. The remediation process should include not only patch deployment but also configuration reviews to ensure that storage spaces are properly secured and that unauthorized users cannot manipulate storage configurations to gain elevated privileges.