CVE-2016-3356 in Windows
Summary
by MITRE
The Graphics Device Interface (GDI) in Microsoft Windows 10 1607 allows remote attackers to execute arbitrary code via a crafted document, aka "GDI Remote Code Execution Vulnerability."
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Analysis
by VulDB Data Team • 09/16/2022
The vulnerability identified as CVE-2016-3356 represents a critical remote code execution flaw within the Graphics Device Interface component of Microsoft Windows 10 version 1607. This vulnerability resides in the GDI subsystem which serves as the core graphics rendering engine responsible for processing graphical operations and displaying visual content across the operating system. The flaw specifically manifests when the system processes specially crafted documents that contain malformed graphics data, creating a pathway for malicious actors to execute arbitrary code with the privileges of the targeted user. The vulnerability's classification as a remote code execution issue means that attackers can exploit this weakness without requiring physical access to the system, making it particularly dangerous in networked environments where users might encounter malicious documents through email attachments, web downloads, or shared network resources.
The technical nature of this vulnerability stems from insufficient validation of graphics data structures within the GDI processing pipeline. When Windows 10 1607 encounters a crafted document containing malicious graphics elements, the GDI component fails to properly validate input parameters before processing them, leading to memory corruption that can be leveraged to overwrite critical memory locations. This memory corruption typically occurs through buffer overflows or use-after-free conditions within the graphics rendering code, allowing attackers to inject and execute malicious code in the context of the current user session. The vulnerability demonstrates characteristics consistent with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read conditions that can lead to arbitrary code execution. The attack vector is particularly concerning because it can be triggered through legitimate document processing operations that users perform daily, such as opening email attachments or viewing web content, making the exploitation both accessible and difficult to detect.
The operational impact of CVE-2016-3356 extends beyond simple code execution, as successful exploitation can lead to complete system compromise and persistent access for threat actors. Once an attacker gains execution privileges through this vulnerability, they can establish persistence mechanisms, escalate privileges to SYSTEM level access, and deploy additional malware or backdoors. The vulnerability affects all versions of Windows 10 1607, including both desktop and server editions, creating widespread exposure across enterprise networks where users might unknowingly open malicious documents. Organizations that rely heavily on document processing and email systems face particular risk, as the attack surface includes common user activities like opening Word documents, PDF files, or even web-based content that may contain embedded graphics. This vulnerability aligns with ATT&CK technique T1059, which describes the use of command and scripting interpreters for execution, and T1068, which covers the exploitation of remote services for privilege escalation.
Mitigation strategies for CVE-2016-3356 require immediate action from system administrators and security teams to address the vulnerability before it can be exploited. Microsoft released security patches in August 2016 that address the underlying GDI processing flaws, and organizations should prioritize deployment of these updates across all affected Windows 10 1607 systems. Additionally, network administrators should implement defensive measures such as restricting access to potentially malicious file types, deploying email filtering solutions that can identify and block suspicious documents, and establishing application whitelisting policies that prevent execution of untrusted graphics processing components. Security monitoring should include detection of unusual graphics processing activity and memory access patterns that might indicate exploitation attempts. The vulnerability also highlights the importance of maintaining up-to-date security patches and implementing layered defense strategies, as it demonstrates how seemingly benign system components like graphics rendering can serve as attack vectors for sophisticated exploitation techniques. Organizations should also consider implementing network segmentation to limit the potential impact of successful exploitation and establish incident response procedures specifically tailored to handle remote code execution vulnerabilities in graphics processing components.