CVE-2016-3344 in Windows
Summary
by MITRE
The Secure Kernel Mode feature in Microsoft Windows 10 Gold and 1511 allows local users to obtain sensitive information via a crafted application, aka "Windows Secure Kernel Mode Information Disclosure Vulnerability."
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/07/2024
The vulnerability identified as CVE-2016-3344 resides within the Secure Kernel Mode feature of Microsoft Windows 10 operating systems, specifically affecting the Gold and 1511 releases. This flaw represents a critical information disclosure vulnerability that undermines the security assurances provided by the Secure Kernel Mode implementation. The vulnerability manifests when a malicious application is executed on a system with Secure Kernel Mode enabled, allowing an attacker to extract sensitive information from the kernel space. This represents a fundamental breach in the isolation mechanisms that Secure Kernel Mode is designed to maintain between user-mode applications and kernel-mode operations.
The technical exploitation of this vulnerability occurs through the manipulation of kernel-level data structures and memory management functions within the Secure Kernel Mode framework. The flaw stems from inadequate validation of kernel-mode operations and insufficient access controls that should prevent user-mode applications from querying or accessing kernel-level information. According to CWE classification, this vulnerability maps to CWE-200, which deals with exposure of sensitive information to an unauthorized actor, and CWE-215, which addresses the exposure of debug information. The vulnerability allows an attacker to potentially extract information about kernel memory layouts, process structures, or other sensitive kernel data that should remain protected from user-mode access.
The operational impact of CVE-2016-3344 extends beyond simple information disclosure, as the extracted kernel information can serve as a foundation for more sophisticated attacks. An attacker who successfully exploits this vulnerability gains insights into the internal workings of the Windows kernel, which can then be leveraged to craft more targeted exploits against other system components. This information disclosure creates opportunities for privilege escalation attacks, as the attacker can use the leaked kernel information to bypass security mechanisms or identify additional vulnerabilities in the system. The vulnerability affects systems running Windows 10 Gold and 1511 versions where Secure Kernel Mode is enabled, potentially compromising the integrity of the entire operating system security model.
From an adversarial perspective, this vulnerability aligns with tactics described in the MITRE ATT&CK framework under the information gathering phase, specifically targeting the collection of system information and privilege escalation techniques. The vulnerability can be exploited as part of a broader attack chain where initial access is achieved through a crafted application, and the information disclosure serves as a critical enabler for subsequent exploitation phases. Microsoft's security advisory indicates that the vulnerability requires local system access to exploit, meaning that an attacker must already have user-level privileges on the target system. However, the potential for privilege escalation makes this vulnerability particularly dangerous in environments where users might have elevated access rights or where initial access can be gained through social engineering or other attack vectors.
The recommended mitigations for CVE-2016-3344 include immediate application of Microsoft security patches that address the kernel information disclosure issue within Secure Kernel Mode. Organizations should ensure that all Windows 10 systems are updated to the latest security releases that contain fixes for this vulnerability. Additionally, security administrators should consider disabling Secure Kernel Mode if it is not essential for their specific use cases, particularly in environments where the risk of local privilege escalation attacks is high. Network segmentation and privilege minimization strategies should also be implemented to reduce the potential impact of successful exploitation. The vulnerability demonstrates the importance of proper kernel-mode access control and the necessity of rigorous security testing for advanced operating system features that provide security assurances to users and administrators.