CVE-2018-0831 in Windows
Summary
by MITRE
The Windows kernel in Windows 10 versions 1607, 1703 and 1709, Windows Server 2016 and Windows Server, version 1709 allows an elevation of privilege vulnerability due to how objects in memory are handled, aka "Windows Kernel Elevation of Privilege Vulnerability".
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Analysis
by VulDB Data Team • 08/17/2024
The vulnerability identified as CVE-2018-0831 represents a critical elevation of privilege flaw within the Windows kernel component affecting multiple Windows 10 and Windows Server versions. This issue stems from improper handling of objects in memory during kernel operations, creating a pathway for malicious actors to escalate their privileges from standard user level to system level access. The vulnerability specifically impacts Windows 10 versions 1607, 1703, and 1709, alongside Windows Server 2016 and Windows Server version 1709, making it a widespread concern across Microsoft's operating system landscape. The root cause lies in how the kernel manages memory objects, particularly when dealing with certain kernel-mode operations that fail to properly validate or handle object references, leading to potential memory corruption scenarios. This flaw falls under the Common Weakness Enumeration category CWE-121, which addresses stack-based buffer overflow conditions, though the specific implementation involves kernel memory management rather than traditional stack overflows. The vulnerability operates through a privilege escalation vector that allows attackers to execute code with elevated privileges, effectively bypassing standard user access controls and gaining unrestricted system access.
The operational impact of CVE-2018-0831 extends beyond simple privilege escalation, as it provides attackers with complete system compromise capabilities. Once exploited, the vulnerability enables malicious actors to install persistent backdoors, modify system files, access sensitive data, and potentially establish footholds for further network infiltration. The attack surface is particularly concerning given that the vulnerability exists in core kernel components that handle essential system operations, making exploitation relatively straightforward for skilled attackers. From an adversary perspective, this vulnerability aligns with ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation," and T1059, covering "Command and Scripting Interpreter," as attackers can leverage the elevated privileges to execute malicious commands and scripts. The vulnerability's exploitation typically requires local system access or a user to be tricked into executing malicious code, though the privilege escalation aspect means that even a low-privilege user account can be leveraged to gain full system control. The memory handling flaw creates a condition where attackers can manipulate kernel objects to overwrite critical system structures, effectively subverting the operating system's security model.
Mitigation strategies for CVE-2018-0831 primarily focus on immediate patch deployment through Microsoft's regular security updates, as the vulnerability was addressed in the August 2018 security bulletin. Organizations should prioritize applying the relevant security patches to all affected systems, particularly those running the vulnerable Windows 10 and Windows Server versions. Network administrators should implement additional defensive measures including monitoring for suspicious privilege escalation attempts, enforcing least privilege principles, and maintaining comprehensive system logging to detect exploitation attempts. The vulnerability's nature makes it particularly susceptible to automated exploitation tools, as the kernel memory handling flaw can be reliably triggered through specific code sequences that manipulate kernel objects. Security teams should also consider implementing behavioral monitoring solutions that can detect anomalous kernel activity patterns that may indicate exploitation attempts. Additionally, organizations should review their system configurations to ensure that unnecessary services are disabled and that user accounts have minimal required privileges to reduce the potential impact if exploitation occurs. The vulnerability's classification as a kernel-level flaw means that traditional endpoint protection solutions may not prevent exploitation, requiring more comprehensive security approaches including system hardening, regular security assessments, and robust incident response procedures. Given the severity of the privilege escalation capability, organizations should also consider implementing multi-factor authentication and privileged access management solutions to provide additional layers of protection beyond what the patched kernel can provide.