CVE-2016-3216 in Windows
Summary
by MITRE
GDI32.dll in the Graphics component in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allows remote attackers to bypass the ASLR protection mechanism via unspecified vectors, aka "Windows Graphics Component Information Disclosure Vulnerability."
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Analysis
by VulDB Data Team • 03/11/2025
The vulnerability identified as CVE-2016-3216 represents a critical information disclosure flaw within the Windows Graphics component, specifically affecting GDI32.dll in multiple Windows operating system versions. This vulnerability resides in the Graphics Device Interface subsystem that handles graphical operations and rendering within the Windows ecosystem. The flaw enables remote attackers to bypass Address Space Layout Randomization, a fundamental security mitigation technique designed to prevent exploitation of memory corruption vulnerabilities by randomizing the memory layout of processes. This represents a significant weakening of Windows security posture as ASLR is considered one of the primary defenses against exploit development and code execution attacks. The vulnerability affects a broad range of Microsoft Windows platforms including legacy systems like Windows Vista and Server 2008, alongside newer releases such as Windows 8.1 and Windows 10 versions up to 1511, making it particularly concerning for enterprise environments with diverse operating system deployments. The unspecified vectors that enable this bypass suggest the vulnerability may stem from improper handling of graphics objects or memory management within the GDI32.dll component during graphics processing operations.
The technical exploitation of this vulnerability occurs through mechanisms that allow attackers to gain insights into memory layout structures that would normally be randomized and unpredictable. When graphics components process certain malformed or specially crafted graphical data, the GDI32.dll module fails to properly maintain the randomized memory addresses that ASLR would normally enforce. This information disclosure can reveal memory addresses of system libraries, heap locations, or other critical process memory regions that would otherwise remain obscured to attackers. The flaw essentially provides attackers with the ability to map out the virtual memory layout of target processes, effectively nullifying one of the most important exploit mitigations. From a cybersecurity perspective, this vulnerability directly relates to CWE-200, which deals with Information Exposure, and represents a specific implementation weakness in how the graphics subsystem maintains memory protection boundaries. The vulnerability's impact extends beyond simple information disclosure as it significantly reduces the difficulty of subsequent exploitation attempts by providing attackers with crucial address information needed for Return-Oriented Programming and other advanced exploitation techniques.
The operational impact of CVE-2016-3216 is substantial for organizations relying on affected Windows platforms, as it creates a pathway for attackers to bypass critical security protections that are fundamental to modern exploit resistance. Organizations running these vulnerable systems face increased risk of successful exploitation of other vulnerabilities that may be present in the same systems, as the bypass of ASLR significantly reduces the complexity and success rate of attack vectors. The vulnerability is particularly dangerous in enterprise environments where multiple systems may be running the affected Windows versions, as it allows attackers to gather information about system memory layouts that could be used to target specific applications or system components. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and defense evasion, specifically leveraging information gathering capabilities to weaken system protections. The vulnerability also impacts the effectiveness of exploit mitigation strategies such as Data Execution Prevention and stack canaries, as the memory layout information can be used to craft more precise exploitation attempts. Organizations may experience cascading security impacts as attackers use this vulnerability as a stepping stone to access sensitive data, escalate privileges, or deploy additional malware components.
Mitigation strategies for CVE-2016-3216 primarily focus on applying Microsoft security updates and patches that address the underlying GDI32.dll implementation issues. System administrators should prioritize deployment of the relevant security updates from Microsoft's monthly security bulletin releases, as these patches specifically target the information disclosure mechanisms that enable ASLR bypass. Organizations should also consider implementing network segmentation and access controls to limit the attack surface for systems running vulnerable Windows versions, particularly those that process untrusted graphics data or are exposed to external networks. Additional defensive measures include monitoring for unusual graphics processing activities that might indicate exploitation attempts, implementing application whitelisting policies for graphics-related applications, and maintaining up-to-date intrusion detection systems that can identify patterns consistent with information disclosure attacks. Given the broad scope of affected platforms, organizations should conduct comprehensive inventory assessments to identify all systems running vulnerable Windows versions and prioritize patching efforts based on risk exposure. The vulnerability also underscores the importance of maintaining current security practices and avoiding the use of legacy Windows platforms where possible, as these systems often contain unpatched vulnerabilities that can be exploited to undermine security controls.