CVE-2018-1036 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 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 • 03/22/2023
The NTFS Elevation of Privilege Vulnerability represents a critical security flaw in the Windows file system that allows attackers to escalate their privileges from standard user level to administrator level. This vulnerability specifically manifests in how the New Technology File System handles access control checks, creating a pathway for unauthorized privilege escalation that affects multiple Windows operating systems including legacy versions like Windows 7 and Server 2008, as well as newer releases such as Windows 10 and Server 2016. The vulnerability stems from improper validation of access permissions within the file system layer, enabling malicious actors to bypass normal security controls that should prevent unauthorized access to protected resources.
The technical implementation of this vulnerability involves a flaw in the NTFS access control list (ACL) processing mechanism where the system fails to properly validate access permissions during certain file operations. When a user attempts to access a file or directory, the NTFS subsystem should verify that the requesting user has appropriate permissions before granting access. However, this vulnerability allows attackers to manipulate the access check process, potentially enabling them to gain write permissions to files they normally shouldn't be able to modify. The flaw operates at the kernel level within the Windows file system driver, making it particularly dangerous as it can be exploited before the operating system has properly authenticated the user's privileges.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a persistent foothold within the compromised system. Once successfully exploited, an attacker can modify critical system files, install malicious software, or establish backdoors that persist across system reboots. The vulnerability affects systems running multiple Windows versions simultaneously, creating a broad attack surface that security teams must address across their entire infrastructure. Organizations with legacy systems such as Windows Server 2008 and Windows Server 2012 R2 are particularly vulnerable, as these systems often remain in production environments despite lacking current security updates.
Security professionals should consider this vulnerability in the context of the ATT&CK framework's privilege escalation tactics, where the vulnerability directly maps to techniques involving kernel exploits and access control manipulation. The Common Weakness Enumeration categorizes this as a weakness related to improper access control validation, specifically CWE-284 which addresses inadequate access control mechanisms. Mitigation strategies should include immediate deployment of Microsoft security patches, implementation of network segmentation to limit lateral movement, and enhanced monitoring for suspicious file access patterns. System administrators must also consider implementing additional security controls such as mandatory access controls and privilege monitoring to detect potential exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches across all operating system versions and highlights the critical need for continuous vulnerability assessment and remediation processes.
This vulnerability demonstrates how fundamental file system security mechanisms can be compromised to create persistent security risks. The impact is particularly severe because it operates at the core file system level, affecting system integrity and potentially enabling complete system compromise. Organizations should treat this as a high-priority vulnerability requiring immediate remediation, especially in environments where legacy systems are still operational. The exploitation of such vulnerabilities often indicates broader security gaps in an organization's defensive posture, suggesting that comprehensive security assessments and updated incident response procedures are necessary to prevent similar attacks from succeeding.