CVE-2019-1011 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-2019-1012, CVE-2019-1013, CVE-2019-1015, CVE-2019-1016, CVE-2019-1046, CVE-2019-1047, CVE-2019-1048, CVE-2019-1049, CVE-2019-1050.
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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, leading to unauthorized exposure of sensitive data stored within its memory regions. The issue stems from improper validation of memory boundaries and insufficient access restrictions during graphics processing operations, creating potential pathways for malicious actors to extract confidential information from system memory. The vulnerability impacts multiple Windows versions including Windows 7, Windows Server 2008, Windows 8.1, Windows Server 2012, Windows Server 2012 R2, Windows 10, and Windows Server 2016, making it a widespread concern across enterprise environments. The flaw is categorized under CWE-200, which specifically addresses "Information Exposure" vulnerabilities in software systems. This classification indicates that the vulnerability allows for the unintentional disclosure of sensitive information that could be exploited by attackers to gain deeper insights into the system's internal state and configuration.
The technical exploitation of this vulnerability occurs through carefully crafted graphics operations that trigger memory access violations within the GDI subsystem. Attackers can leverage this flaw by constructing malicious graphics content or manipulating existing graphics processing workflows to force the system into revealing memory contents that should remain protected. The vulnerability typically manifests during rendering operations where the GDI component processes graphical data, particularly when handling certain bitmap formats or graphic primitives. The improper memory handling allows attackers to potentially access sensitive data such as kernel memory addresses, credential information, or other confidential system data that resides in memory regions typically protected from user-level access. This information disclosure can occur without requiring elevated privileges, making it particularly dangerous as it can be exploited by less privileged users or processes. The vulnerability aligns with ATT&CK technique T1005, which covers "Data from Local System" and represents a common vector for information gathering activities in attack chains.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can serve as a foundation for more sophisticated attacks within a broader exploitation strategy. While the primary effect is the exposure of memory contents, this information can be invaluable for attackers planning subsequent exploitation attempts, including privilege escalation or remote code execution attacks. The disclosed information may include stack traces, memory addresses, or other system metadata that can be leveraged to bypass security mechanisms such as address space layout randomization or data execution prevention. Organizations running affected systems face significant risk as this vulnerability can be exploited in both local and remote scenarios, particularly in environments where users have the ability to process graphics content or where applications interact with graphics rendering capabilities. The vulnerability's impact is further amplified in enterprise environments where multiple users interact with graphics-intensive applications, potentially creating numerous attack vectors. Security professionals must consider this vulnerability as part of a comprehensive threat landscape assessment, as it represents a potential stepping stone for attackers seeking to establish persistent access or escalate privileges within compromised systems.
Mitigation strategies for this vulnerability focus on both immediate patching and operational security enhancements. Microsoft released security updates that address the memory handling issues within the GDI component, requiring system administrators to deploy these patches promptly across all affected systems. Organizations should implement network segmentation to limit access to graphics processing capabilities where possible, reducing the attack surface for exploitation. Additionally, monitoring systems should be configured to detect unusual graphics processing patterns that might indicate exploitation attempts. The implementation of application whitelisting policies can prevent unauthorized graphics applications from executing, while regular security assessments should verify that systems are properly patched and configured. Security teams should also consider implementing behavioral monitoring for graphics-related processes to detect anomalous activities that could indicate exploitation attempts. Given the nature of information disclosure vulnerabilities, organizations should conduct regular vulnerability assessments focusing on memory management components and ensure that security controls are properly configured to prevent unauthorized memory access. The vulnerability demonstrates the critical importance of proper memory management practices in operating system components and highlights the need for continuous security testing and monitoring of core system functions.