CVE-2019-0774 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-2019-0614.
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Analysis
by VulDB Data Team • 07/13/2024
The vulnerability identified as CVE-2019-0774 represents a critical information disclosure flaw within the Windows Graphics Device Interface component that fundamentally compromises system security through improper memory handling. This issue resides in the GDI subsystem which serves as the core graphics rendering engine for Windows operating systems, responsible for managing graphical operations and displaying visual content across applications. The vulnerability arises from the component's failure to properly validate memory access operations when processing graphics data, creating opportunities for malicious actors to extract sensitive information from system memory. The flaw specifically manifests when the GDI component processes certain graphics objects or rendering operations that trigger memory disclosure conditions, allowing unauthorized access to potentially sensitive data that should remain protected within system memory boundaries.
The technical exploitation of this vulnerability involves leveraging the improper memory handling within the Windows GDI subsystem to perform information disclosure attacks that can reveal contents from memory locations that should be protected from external access. According to CWE-200, this vulnerability maps directly to information exposure issues where sensitive data is inadvertently made available to unauthorized actors. The flaw operates at the kernel level within the graphics subsystem, making it particularly dangerous as it can be exploited by both local and remote attackers depending on the execution context. The vulnerability demonstrates characteristics consistent with memory corruption and information disclosure patterns that align with ATT&CK technique T1059.001 for command and scripting interpreter execution, where attackers might use the leaked information to further compromise systems through additional attack vectors.
The operational impact of CVE-2019-0774 extends beyond simple information disclosure, as the leaked memory contents could contain sensitive data such as cryptographic keys, user credentials, application data, or system configuration details that could be leveraged for subsequent attacks. This vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it particularly widespread in enterprise environments where these operating systems are prevalent. The risk assessment indicates that successful exploitation could lead to privilege escalation opportunities, as attackers might use the disclosed information to craft more sophisticated attacks against the system. Organizations running affected systems face potential exposure to advanced persistent threats that could utilize the leaked memory contents to bypass security controls, establish persistence, or conduct targeted attacks against specific system components.
Mitigation strategies for this vulnerability require immediate implementation of Microsoft security updates and patches that address the specific memory handling issues within the Windows GDI component. System administrators should prioritize deployment of the relevant security updates as soon as they become available through Microsoft's regular security bulletin releases. Additional protective measures include implementing network segmentation to limit access to systems running affected Windows versions, monitoring for suspicious graphics rendering operations that might indicate exploitation attempts, and maintaining comprehensive system logging to detect potential information disclosure events. The vulnerability's classification as a critical issue by Microsoft underscores the importance of immediate remediation efforts, with recommended actions including disabling unnecessary graphics rendering capabilities where possible and implementing strict access controls for graphics-intensive applications. Organizations should also consider implementing memory protection mechanisms and regular security assessments to identify potential exploitation attempts that might leverage this vulnerability for broader system compromise.