CVE-2020-0624 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0642.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 03/21/2024
The vulnerability described in CVE-2020-0624 represents a critical elevation of privilege flaw within the Windows operating system's Win32k component. This component serves as a fundamental part of the Windows graphical subsystem, responsible for managing user interface elements and handling graphics operations. The vulnerability arises from improper handling of objects in memory, creating a pathway for malicious actors to escalate their privileges from standard user level to system level access. The Win32k.sys driver operates in kernel mode, making this flaw particularly dangerous as it directly impacts the core security architecture of the Windows operating system. This vulnerability is distinct from CVE-2020-0642, which affects different components within the Windows ecosystem, emphasizing that multiple security gaps exist within the Windows platform during this period.
The technical exploitation of this vulnerability occurs through memory management flaws within the Win32k subsystem. When the component processes certain graphical objects or handles specific user interface operations, it fails to validate memory references properly, potentially leading to memory corruption. This memory handling failure can be leveraged by an attacker to execute arbitrary code with elevated privileges. The flaw specifically relates to how the system manages object references and memory allocation within the kernel space, creating opportunities for privilege escalation attacks. Attackers typically need to first gain a foothold on the target system through other means before utilizing this vulnerability to elevate their access level. The vulnerability's impact is amplified by the fact that Win32k is essential for normal system operation, making the exploitation conditions relatively straightforward for determined attackers.
The operational impact of CVE-2020-0624 extends beyond simple privilege escalation, potentially enabling full system compromise and persistent access. Once successfully exploited, attackers can execute malicious code with system-level privileges, allowing them to install backdoors, modify system files, access sensitive data, or establish persistent presence on the compromised system. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, creating widespread exposure across enterprise environments. Organizations running these affected systems face significant risk of data breaches, lateral movement within networks, and potential use as a launchpad for more extensive attacks. The vulnerability's exploitation can occur through various vectors including malicious documents, web pages, or direct system interaction, making it particularly challenging to defend against comprehensively.
Mitigation strategies for this vulnerability require immediate patch deployment as provided by Microsoft through regular security updates. Organizations should prioritize applying the relevant security patches released in the June 2020 security update bulletin, which specifically addresses this Win32k vulnerability. System administrators should also implement additional defensive measures such as enabling exploit protection features, restricting user privileges where possible, and monitoring for suspicious system behavior. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and may also relate to CWE-125, indicating out-of-bounds read conditions in memory management. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques under the T1068 category, specifically targeting kernel-mode exploitation methods. Network segmentation and endpoint protection solutions should be configured to detect and block potential exploitation attempts, while regular security assessments should verify that systems remain protected against this and related vulnerabilities.