CVE-2019-1012 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-2019-0968, CVE-2019-0977, CVE-2019-1009, CVE-2019-1010, CVE-2019-1011, CVE-2019-1013, CVE-2019-1015, CVE-2019-1016, CVE-2019-1046, CVE-2019-1047, CVE-2019-1048, CVE-2019-1049, CVE-2019-1050.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 05/20/2025
The Windows Graphics Device Interface GDI component vulnerability represents a critical information disclosure flaw that affects the operating system's graphics rendering subsystem. This vulnerability specifically manifests when the GDI component fails to properly manage memory access controls, allowing unauthorized disclosure of sensitive data stored in system memory. The issue impacts Windows operating systems including Windows 7, Windows Server 2008 R2, Windows 8.1, Windows Server 2012, Windows Server 2012 R2, Windows 10, and Windows Server 2016. The vulnerability stems from improper validation of memory pointers and buffer boundaries within the GDI graphics processing pipeline, creating potential attack vectors for malicious actors to extract confidential information from memory regions that should remain protected. This type of vulnerability falls under the CWE-200 category of "Information Exposure" and aligns with ATT&CK technique T1005 for "Data from Local System" and T1059 for "Command and Scripting Interpreter" when exploited by attackers to gain additional system access.
The technical exploitation of this vulnerability occurs through crafted graphics operations that trigger memory corruption within the GDI subsystem. When legitimate applications interact with graphics functions, the vulnerable code path fails to properly validate memory access patterns, potentially allowing attackers to read memory contents that contain sensitive information such as cryptographic keys, user credentials, or application data. The flaw typically manifests when processing specially crafted graphics objects or when multiple graphics operations are performed in sequence, creating memory access violations that expose internal system data structures. This vulnerability is particularly concerning because GDI is a fundamental component used by virtually all Windows applications for rendering graphics, making it an attractive target for exploitation. The information disclosure can occur without requiring elevated privileges, though exploitation may require specific conditions related to the graphics context and memory layout.
The operational impact of this vulnerability extends beyond simple information disclosure, as the leaked memory contents can contain sensitive data that may enable further attacks. Attackers who successfully exploit this vulnerability can potentially extract passwords, encryption keys, application data, or even portions of the kernel memory space that could reveal system architecture details. This information can be leveraged for privilege escalation attacks, credential theft, or to develop more sophisticated exploitation techniques targeting other system components. The vulnerability's impact is particularly severe in enterprise environments where Windows systems handle sensitive corporate data, as the leaked information could compromise entire network security postures. Organizations running affected systems face potential data breaches, intellectual property theft, and compliance violations that could result in significant financial and reputational damage.
Mitigation strategies for this vulnerability require immediate patch deployment through Microsoft's regular security updates, as the primary fix involves correcting memory validation routines within the GDI component. System administrators should prioritize patching all affected Windows versions and monitor for any signs of exploitation attempts in their network logs. Additional protective measures include implementing application whitelisting to restrict execution of potentially malicious graphics applications, monitoring for unusual graphics processing activity, and maintaining comprehensive system monitoring for memory access anomalies. Network segmentation and privileged access controls can help limit the potential impact if exploitation occurs, while regular security assessments should verify that systems are properly patched and that no unauthorized access has occurred. Organizations should also consider implementing endpoint detection and response solutions that can identify suspicious graphics-related memory access patterns that might indicate exploitation attempts. The vulnerability's classification as a high-severity issue underscores the importance of immediate remediation and continuous monitoring to prevent exploitation in production environments.