CVE-2016-3371 in Windows
Summary
by MITRE
The kernel API in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold, 1511, and 1607 does not properly enforce permissions, which allows local users to obtain sensitive information via a crafted application, aka "Windows Kernel Elevation of Privilege Vulnerability."
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Analysis
by VulDB Data Team • 05/10/2025
This vulnerability represents a critical kernel permission enforcement flaw in multiple Microsoft Windows operating systems that affects versions from Windows Vista through Windows 10. The issue stems from improper implementation of access control mechanisms within the kernel API, creating a pathway for local attackers to escalate privileges and access sensitive system information. The vulnerability is classified as a privilege escalation weakness that operates at the core operating system level, making it particularly dangerous for attackers who can leverage it to gain elevated system privileges.
The technical nature of this flaw involves the kernel's failure to properly validate and enforce access permissions when processing API calls from user-mode applications. This misconfiguration allows malicious applications to bypass normal security boundaries and access kernel-level resources that should be restricted to system processes only. The vulnerability specifically impacts the Windows kernel's object manager and security descriptor handling mechanisms, which are fundamental components responsible for maintaining system integrity and access control. According to CWE classification, this represents a weakness in the permission system where insufficient access control validation leads to unauthorized privilege escalation.
From an operational perspective, this vulnerability enables local users to obtain sensitive information that could include system memory contents, kernel data structures, or other privileged resources that are normally protected from user-level access. Attackers can craft malicious applications that exploit this weakness to read kernel memory, potentially extracting credentials, encryption keys, or other confidential data. The impact extends beyond simple information disclosure as the vulnerability can be leveraged to establish persistent access to the compromised system, making it a significant threat for both malicious actors and security researchers. The ATT&CK framework categorizes this under privilege escalation techniques, specifically targeting the kernel as a primary attack vector for system compromise.
The mitigation strategies for this vulnerability include applying the official Microsoft security patches released in response to the CVE, which address the kernel permission enforcement flaw through updated access control mechanisms. Organizations should prioritize patch deployment across all affected Windows versions, particularly in enterprise environments where the risk of exploitation is higher. Additionally, implementing security configurations such as disabling unnecessary services, restricting user privileges, and monitoring for suspicious API calls can help reduce the attack surface. Network segmentation and endpoint protection solutions can provide additional layers of defense, though they cannot fully compensate for the underlying kernel-level vulnerability. The vulnerability highlights the critical importance of maintaining up-to-date system security patches and demonstrates how fundamental kernel flaws can create persistent security risks across multiple operating system versions.