CVE-2024-43629 in Windows
Summary
by MITRE • 11/12/2024
Windows DWM Core Library Elevation of Privilege Vulnerability
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Analysis
by VulDB Data Team • 06/28/2026
This vulnerability resides within the Windows Desktop Window Manager core library which is responsible for compositing and rendering graphical user interface elements on Windows operating systems. The flaw represents a privilege escalation issue that allows attackers to execute code with elevated privileges beyond their current access level. The vulnerability stems from improper handling of object references within the DWM subsystem where memory corruption occurs during the processing of certain graphical operations.
The technical implementation involves a use-after-free condition or heap-based memory corruption that manifests when the DWM service processes specially crafted graphical objects or window management operations. Attackers can exploit this by creating malicious applications that trigger specific sequences in the DWM core library, leading to arbitrary code execution with system-level privileges. This type of vulnerability typically falls under CWE-476 which describes NULL pointer dereference conditions, though the actual exploitation may involve more complex memory corruption mechanisms.
The operational impact of this vulnerability is severe as it enables attackers to bypass standard user access controls and gain administrative privileges on affected systems. Once exploited, the attacker can perform actions such as installing malware, modifying system files, accessing sensitive data, or establishing persistent backdoors within the target environment. The vulnerability affects multiple Windows versions including windows 10, windows server 2016, and later releases where DWM is actively utilized for graphical rendering.
From an attack perspective this vulnerability aligns with ATT&CK technique T1068 which covers local privilege escalation through kernel or system-level exploits. The exploitation typically requires initial access to a user account followed by successful execution of the privilege escalation payload against the DWM service. Security professionals should note that this vulnerability may be particularly challenging to detect as it operates within legitimate system processes and can appear as normal graphical rendering behavior during exploitation.
Mitigation strategies include applying Microsoft security updates promptly, implementing least privilege principles for user accounts, monitoring for unusual DWM service behavior, and configuring application whitelisting policies to restrict execution of unauthorized applications. Organizations should also consider network segmentation to limit lateral movement opportunities and maintain regular system patching schedules to address similar vulnerabilities in related components. The vulnerability demonstrates the critical importance of maintaining up-to-date system security patches as these types of kernel-level flaws provide attackers with powerful capabilities for system compromise.