CVE-2016-3364 in Office
Summary
by MITRE
Microsoft Visio 2016 allows remote attackers to execute arbitrary code via a crafted document, aka "Microsoft Office Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 09/16/2022
Microsoft Visio 2016 contains a critical memory corruption vulnerability that enables remote code execution through maliciously crafted documents. This vulnerability falls under the CWE-125 vulnerability type, which represents out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. The flaw exists in how Visio processes certain file formats, particularly those containing specially crafted elements that trigger buffer overflows or heap corruption during document parsing operations. Attackers can exploit this weakness by delivering a malicious Visio document through various attack vectors including email attachments, web downloads, or malicious websites. The vulnerability represents a significant risk to enterprise environments where Visio is commonly used for diagramming and business process documentation, as it allows attackers to execute code with the privileges of the targeted user. This type of vulnerability is particularly dangerous in the context of the ATT&CK framework under the T1059 technique category, as it enables initial access and execution capabilities that can lead to further system compromise.
The technical exploitation of this vulnerability occurs when Visio attempts to parse malformed data structures within the crafted document, leading to memory corruption that can be leveraged to overwrite critical memory locations. The memory corruption typically manifests through stack or heap buffer overflows that occur during document rendering or processing operations. This vulnerability is particularly concerning because Visio documents can be easily distributed through standard business communication channels, making it an attractive target for social engineering campaigns. The exploit requires minimal user interaction beyond opening the malicious document, making it highly effective for targeted attacks against specific individuals or organizations. The vulnerability affects not only the end-user experience but also represents a potential pathway for attackers to establish persistent access within corporate networks where Visio is regularly used for business documentation and workflow visualization.
Organizations should implement immediate mitigations including applying the relevant Microsoft security patches that address this specific memory corruption vulnerability. The recommended approach involves deploying the Microsoft Security Update for Visio 2016 that resolves the buffer overflow conditions in the document parsing components. Network administrators should consider implementing application control measures that restrict the execution of Visio documents from untrusted sources, particularly in high-risk environments. Additional protective measures include configuring email filtering systems to block suspicious Visio document attachments and implementing sandboxing technologies for document processing. Security teams should monitor for indicators of compromise related to this vulnerability, including unusual network connections or file access patterns that may indicate exploitation attempts. The vulnerability's classification under CWE-125 highlights the need for comprehensive input validation and memory safety practices in document processing applications, emphasizing the importance of defensive programming techniques and regular security assessments to prevent similar issues in other software components.
This vulnerability demonstrates the ongoing challenges in securing productivity software against sophisticated attack vectors that exploit memory safety issues. The attack surface for office applications remains particularly broad due to their extensive parsing capabilities and support for complex file formats. Organizations should consider implementing zero-trust security models that verify all document processing operations regardless of source, particularly in environments where Visio is used for sensitive business documentation. Regular security awareness training for employees can help reduce the risk of successful exploitation through social engineering attacks that rely on user interaction with malicious documents. The incident underscores the importance of maintaining up-to-date security patches and implementing layered defense strategies that protect against multiple attack vectors simultaneously. Security professionals should also consider the broader implications of this vulnerability for enterprise security posture and ensure that incident response procedures include specific protocols for handling potential exploitation attempts targeting office productivity applications.