CVE-2009-0097 in Visio
Summary
by MITRE
Microsoft Office Visio 2002 SP2 and 2003 SP3 does not properly validate memory allocation for Visio files, which allows remote attackers to execute arbitrary code via a crafted file, aka "Memory Corruption Vulnerability."
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Analysis
by VulDB Data Team • 05/21/2025
This vulnerability resides in Microsoft Office Visio 2002 Service Pack 2 and Visio 2003 Service Pack 3, representing a critical memory corruption flaw that enables remote code execution through specially crafted Visio files. The issue stems from insufficient validation of memory allocation during file processing, creating a pathway for attackers to manipulate memory structures and potentially gain unauthorized system access. The vulnerability specifically affects the parsing mechanisms within Visio's file handling components, where improper bounds checking allows malicious data to overwrite adjacent memory locations. This type of vulnerability falls under CWE-122, which describes insufficient validation of memory allocation, and aligns with ATT&CK technique T1203, where adversaries leverage memory corruption vulnerabilities to execute malicious code. The flaw manifests when Visio processes malformed files that contain oversized or improperly structured data elements, leading to buffer overflows that can be exploited to redirect program execution flow.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a potential foothold for more sophisticated attacks within enterprise environments. When a user opens a maliciously crafted Visio file, the application's memory management routines fail to properly handle the unexpected data structures, resulting in memory corruption that can be leveraged to inject and execute arbitrary code with the privileges of the affected user. This represents a significant risk in corporate networks where Visio files might be shared through email attachments, document repositories, or collaborative platforms. The vulnerability's remote exploitation capability means that attackers do not need physical access to target systems, as they can deliver malicious files through various network-based attack vectors including phishing campaigns or compromised websites. The memory corruption occurs during file parsing operations, making it particularly dangerous as it can be triggered simply by opening a malicious file, requiring no additional user interaction beyond the initial file access.
Mitigation strategies for this vulnerability must address both immediate protection and long-term security posture strengthening. Microsoft released security patches to address the memory allocation validation issues in affected Visio versions, emphasizing the importance of timely patch management for enterprise environments. Organizations should implement strict file validation policies that include sandboxing Visio file processing, network-based intrusion detection systems that monitor for suspicious file access patterns, and user education programs to reduce the risk of accidental file execution. Security controls should also include application whitelisting that restricts Visio execution to trusted environments and network segmentation that isolates systems running older Visio versions. The vulnerability's classification as a memory corruption issue aligns with industry best practices for vulnerability management, where such flaws require immediate attention due to their potential for remote code execution. Additionally, organizations should consider implementing automated file analysis tools that can detect malformed Visio files before they reach end users, and establish incident response procedures specifically designed to handle memory corruption exploit attempts. Regular security assessments and penetration testing should include evaluation of legacy software components like Visio 2002 and 2003 to identify similar vulnerabilities that may exist in other applications within the enterprise ecosystem.