CVE-2020-1308 in Windows
Summary
by MITRE
<p>An elevation of privilege vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.</p> <p>The update addresses the vulnerability by correcting how DirectX handles objects in memory.</p>
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Analysis
by VulDB Data Team • 02/24/2026
The CVE-2020-1308 vulnerability represents a critical elevation of privilege flaw within the DirectX graphics subsystem of Microsoft Windows operating systems. This vulnerability resides in the kernel-mode component of DirectX, specifically in how the graphics driver handles memory objects during rendering operations. The flaw allows an attacker with local user credentials to escalate their privileges from standard user level to full kernel-level access, effectively granting complete system control. The vulnerability is particularly concerning because it operates within the graphics processing pipeline where legitimate applications interact with hardware through DirectX APIs, making exploitation both plausible and potentially undetectable through standard security monitoring.
The technical implementation of this vulnerability stems from improper memory management practices within DirectX's graphics driver components. When DirectX processes certain graphics objects or rendering commands, it fails to properly validate or sanitize memory references, creating opportunities for memory corruption that can be exploited through carefully crafted malicious applications. This type of vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow conditions. The flaw specifically manifests when DirectX handles objects in memory without adequate bounds checking or memory validation mechanisms, allowing attackers to manipulate memory layouts and potentially execute arbitrary code with kernel privileges.
From an operational perspective, this vulnerability presents significant risk to enterprise environments where users may have legitimate access to systems through standard login credentials. The exploitation process requires only a local login and the ability to execute a specially crafted application, making it accessible to attackers who have already gained initial access through other means such as phishing attacks or credential theft. Once exploited, the attacker gains complete system control including the ability to install malicious software, modify or delete critical system data, and create new user accounts with administrative privileges. This vulnerability directly maps to ATT&CK technique T1068, which describes the use of local privilege escalation techniques, and T1547.001, which covers registry run keys and startup folder modifications that attackers might use to maintain persistence after exploitation.
The security patch for CVE-2020-1308 addresses the core issue by implementing proper memory validation procedures within DirectX's object handling mechanisms. Microsoft's fix involves strengthening the memory management routines to ensure that all graphics objects are properly validated before being processed in kernel mode, preventing the memory corruption that enables privilege escalation. Organizations should prioritize deployment of this update as a critical security measure, particularly in environments where users may have elevated privileges or where the systems are exposed to potential malicious actors. The vulnerability demonstrates the importance of proper memory management in kernel-mode drivers and highlights the need for comprehensive security testing of graphics subsystems, especially given the widespread use of DirectX across Windows platforms. Regular security assessments and monitoring for anomalous kernel-mode activity should be implemented to detect potential exploitation attempts.