CVE-2018-8411 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when NTFS improperly checks access, aka "NTFS Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
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Analysis
by VulDB Data Team • 06/21/2024
The CVE-2018-8411 vulnerability represents a critical elevation of privilege flaw within the Windows NT File System implementation that stems from improper access checking mechanisms. This vulnerability specifically affects multiple Windows operating system versions including Windows 7, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows 8.1, Windows RT 8.1, and Windows 10 across both client and server variants. The flaw exists within the NTFS file system's access control validation process where the system fails to properly verify user permissions when processing certain file operations, creating a pathway for unauthorized privilege escalation.
From a technical perspective, this vulnerability manifests when NTFS encounters specific file system operations that should require elevated permissions but instead proceed without proper access validation. The underlying issue lies in the kernel-mode file system driver's failure to correctly enforce access control lists and permission checks during file access scenarios. This misconfiguration allows malicious actors to exploit the system by crafting specific file operations that bypass normal security boundaries, effectively enabling them to gain higher privileges than initially granted. The vulnerability operates at the kernel level and can be exploited through various attack vectors including malicious file creation, modification, or access attempts that trigger the flawed access checking logic.
The operational impact of CVE-2018-8411 is substantial as it provides attackers with a means to escalate their privileges from standard user level to system level execution. This elevation of privilege allows threat actors to bypass security controls, access restricted system resources, modify critical system files, and potentially establish persistent access within the compromised environment. The vulnerability's exploitation can lead to complete system compromise, data theft, lateral movement within network environments, and the establishment of backdoors or other malicious infrastructure. Organizations running affected Windows versions face significant risk as this vulnerability can be leveraged by both automated attacks and targeted threat campaigns without requiring additional attack surface exploitation.
Security professionals should implement immediate mitigations including applying the relevant Microsoft security updates that address the NTFS access checking flaw. The vulnerability aligns with CWE-284 which describes improper access control scenarios, and can be mapped to ATT&CK technique T1068 which covers local privilege escalation. Organizations should also consider implementing additional defensive measures such as monitoring for unusual file system access patterns, restricting user privileges where possible, and ensuring comprehensive patch management processes are in place. Network segmentation and privilege least-privilege principles should be enforced to limit the potential damage from successful exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify systems that may not have received the necessary patches, as this vulnerability affects a broad range of Windows operating systems that may not be consistently updated across all environments.