CVE-2022-26810 in Windows
Summary
by MITRE • 04/15/2022
Windows File Server Resource Management Service Elevation of Privilege Vulnerability. This CVE ID is unique from CVE-2022-26827.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 04/18/2022
The Windows File Server Resource Management Service Elevation of Privilege Vulnerability represents a critical security flaw within Microsoft's file server infrastructure that allows unauthenticated attackers to escalate their privileges on affected systems. This vulnerability specifically targets the Windows File Server Resource Management service, which is responsible for managing file server resources and providing administrative capabilities for file sharing operations. The flaw exists in the service's handling of authentication and authorization mechanisms, creating a pathway for attackers to bypass normal security controls and gain elevated system privileges without proper credentials.
The technical implementation of this vulnerability stems from improper validation of service requests within the File Server Resource Management service. When the service processes incoming requests, it fails to adequately verify the authenticity and authorization level of requesting entities, particularly in scenarios involving remote administration and resource management operations. This weakness manifests as a privilege escalation opportunity where an attacker can manipulate service interactions to execute code with elevated privileges, potentially achieving SYSTEM level access on vulnerable Windows systems. The vulnerability is particularly concerning because it operates at the service level rather than requiring user interaction or specific malicious payloads, making it more accessible to automated exploitation.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential full system compromise and data exfiltration capabilities. Attackers who successfully exploit this vulnerability can gain unauthorized access to sensitive file shares, modify critical system files, install persistent backdoors, and potentially move laterally within network environments. The vulnerability affects multiple Windows Server versions including Windows Server 2016, Windows Server 2019, and Windows Server 2022, creating widespread exposure across enterprise environments that rely on file server infrastructure. Organizations with unpatched systems face significant risk of unauthorized data access, system compromise, and potential regulatory violations due to the severity of the privilege escalation opportunity.
Security professionals should prioritize immediate remediation through Microsoft's security updates and patches, as this vulnerability has been actively exploited in the wild. The flaw aligns with CWE-284, which describes improper access control in software systems, and maps to ATT&CK technique T1068, which covers the use of elevated privileges for system access. Organizations should implement network segmentation to limit access to file server resources, monitor for unusual service access patterns, and maintain comprehensive logging of file server operations. Additionally, implementing principle of least privilege access controls and regular security assessments of file server configurations can help mitigate the risk of exploitation. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing layered defense strategies to protect against sophisticated privilege escalation attacks targeting core infrastructure services.