CVE-2020-0744 in Windows
Summary
by MITRE
An information disclosure vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in memory, allowing an attacker to retrieve information from a targeted system, aka 'Windows GDI Information Disclosure Vulnerability'.
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Analysis
by VulDB Data Team • 03/30/2024
The vulnerability identified as CVE-2020-0744 represents a critical information disclosure flaw within the Windows Graphics Device Interface component that operates at a fundamental level of the operating system's graphical rendering capabilities. This vulnerability specifically affects how GDI manages object references in memory, creating an exploitable condition that enables malicious actors to extract sensitive data from system memory through carefully crafted graphics operations. The flaw exists in the kernel-mode drivers responsible for processing graphics commands, making it particularly dangerous as it operates at the core of Windows graphical subsystem functionality and can be leveraged by attackers with minimal privileges to gain unauthorized access to system information.
The technical implementation of this vulnerability stems from improper memory management practices within GDI object handling mechanisms, particularly when processing certain graphics operations that involve object references and memory pointers. When a malicious application or process submits specific GDI commands that manipulate graphics objects, the system fails to properly validate or sanitize memory access patterns, resulting in information leakage through memory corruption or improper object disposal. This type of vulnerability falls under the CWE-200 category of "Information Exposure" and represents a classic case of insufficient input validation and memory management controls. The flaw allows attackers to potentially extract kernel memory contents including sensitive data structures, cryptographic keys, or other confidential information that should remain protected from user-mode processes.
From an operational impact perspective, this vulnerability creates significant risk for organizations as it can be exploited remotely through various attack vectors including malicious websites, email attachments, or compromised applications that trigger graphics rendering operations. The information disclosure could potentially expose system internals, memory layouts, or sensitive data that could be leveraged for further exploitation, including privilege escalation attacks or advanced persistent threat operations. Security researchers have noted that the vulnerability can be particularly dangerous in enterprise environments where Windows systems are extensively used for business operations, as it provides attackers with valuable reconnaissance data that can inform subsequent attack phases. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise deployments.
The exploitation of CVE-2020-0744 aligns with several tactics described in the MITRE ATT&CK framework, particularly those related to reconnaissance and credential access phases. Attackers can use this vulnerability as part of a broader exploitation chain to gather system information before attempting more sophisticated attacks. The vulnerability's classification under CWE-200 and its potential for information disclosure makes it a significant concern for organizations implementing security controls, as it can bypass traditional security boundaries and provide attackers with insights into system internals. Mitigation strategies should include immediate deployment of Microsoft security patches, implementation of network monitoring to detect anomalous graphics processing behavior, and enhanced memory protection mechanisms such as address space layout randomization and control flow integrity. Organizations should also consider implementing application whitelisting policies to restrict potentially malicious graphics operations and establish incident response procedures specifically addressing information disclosure vulnerabilities in graphical subsystems.