CVE-2019-0602 in Windows
Summary
by MITRE
An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka 'Windows GDI Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0615, CVE-2019-0616, CVE-2019-0619, CVE-2019-0660, CVE-2019-0664.
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Analysis
by VulDB Data Team • 07/09/2023
The Windows Graphics Device Interface GDI component vulnerability represents a critical information disclosure flaw that affects the core graphics subsystem of Microsoft Windows operating systems. This vulnerability specifically manifests when the GDI component fails to properly manage memory access controls, leading to unauthorized exposure of sensitive data stored within its memory regions. The flaw exists at the kernel level where graphics rendering operations interact with system memory, creating potential pathways for malicious actors to extract confidential information that should remain protected within the operating system's memory space. The vulnerability impacts multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it particularly concerning given the widespread adoption of these platforms across enterprise environments.
The technical exploitation of this vulnerability stems from improper memory handling within the GDI subsystem's graphics processing routines. When applications make graphics calls to the GDI component, the system allocates memory buffers for rendering operations, but fails to adequately validate or sanitize memory boundaries during these operations. This allows attackers to potentially read memory contents that contain sensitive data such as cryptographic keys, user credentials, or application data that should remain isolated from unauthorized access. The vulnerability falls under CWE-200, which specifically addresses "Information Exposure" and represents a classic case of insufficient memory access control. The flaw is particularly dangerous because it operates at the kernel level where privilege separation is minimal, allowing user-mode applications to potentially access memory regions that contain sensitive information typically protected by the operating system's memory management subsystem.
From an operational perspective, this vulnerability creates significant risk for organizations deploying Windows systems, particularly those handling sensitive data or operating in regulated environments. Attackers could leverage this information disclosure to gain insights into system internals, potentially leading to more sophisticated attacks including privilege escalation or lateral movement within the network. The vulnerability's impact extends beyond simple data exposure as it can provide attackers with information necessary to bypass security controls and understand system behavior. The fact that this vulnerability is distinct from related CVEs such as CVE-2019-0615 through CVE-2019-0664 indicates it represents a unique memory handling flaw within the GDI subsystem rather than a broader class of graphics rendering issues. Security professionals should note that this vulnerability operates within the ATT&CK framework under the Information Gathering tactic, specifically targeting the Collection phase where adversaries seek to understand system configurations and identify potential attack vectors.
Mitigation strategies for this vulnerability should focus on immediate patch deployment as provided by Microsoft through their regular security updates, particularly the patches released in the June 2019 security bulletin. Organizations should also implement additional monitoring of graphics-related system calls and memory access patterns to detect potential exploitation attempts. Network segmentation and privilege separation measures can help limit the potential impact if exploitation occurs, while regular security assessments should verify that the patch has been properly applied across all affected systems. The vulnerability highlights the importance of proper memory management in kernel-level components and reinforces the need for comprehensive security testing of system drivers and subsystems that handle sensitive operations. Given the nature of the vulnerability, organizations should also consider implementing runtime application protection measures and monitoring for unusual graphics processing patterns that might indicate exploitation attempts.