CVE-2009-0095 in Visio
Summary
by MITRE
Microsoft Office Visio 2002 SP2, 2003 SP3, and 2007 SP1 does not properly validate object data in Visio files, which allows remote attackers to execute arbitrary code via a crafted file, aka "Memory Validation Vulnerability."
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 08/26/2019
The vulnerability identified as CVE-2009-0095 represents a critical memory validation flaw affecting Microsoft Office Visio versions 2002 SP2, 2003 SP3, and 2007 SP1. This issue stems from insufficient input validation mechanisms within the Visio file processing engine, specifically when handling object data embedded within visio files. The flaw exists in the way these applications parse and validate structural elements within visio document formats, creating opportunities for malicious actors to craft specially designed visio files that exploit memory handling weaknesses in the application's runtime environment.
The technical exploitation of this vulnerability occurs through the manipulation of object data structures within visio files, where attackers can craft malicious content that triggers buffer overflows or memory corruption conditions when the vulnerable applications attempt to process these files. This memory validation failure allows remote attackers to inject and execute arbitrary code within the context of the user running the affected Visio applications. The vulnerability falls under the CWE-125 vulnerability type, which specifically addresses out-of-bounds read conditions, and more broadly relates to CWE-787, representing out-of-bounds write conditions that can lead to code execution. The attack vector is particularly dangerous as it requires no local privileges and can be delivered through email attachments or web downloads, making it highly suitable for widespread exploitation.
The operational impact of this vulnerability extends beyond simple code execution, as successful exploitation can lead to complete system compromise, data theft, and persistent backdoor establishment. Attackers can leverage this vulnerability to gain unauthorized access to systems running vulnerable Visio versions, potentially escalating privileges and establishing persistent access within network environments. The vulnerability's remote exploitation capability means that organizations with traditional network boundaries are at risk, as the attack can be initiated through email campaigns or compromised websites. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1203, which involves exploiting software vulnerabilities to gain access to systems, and T1059, representing command and control through legitimate system processes.
Organizations should immediately implement mitigations including applying the relevant Microsoft security updates, implementing strict file validation policies for visio files, and deploying network-based intrusion detection systems to monitor for suspicious file processing activities. Additionally, user education regarding the dangers of opening untrusted visio files remains critical, as social engineering remains a primary delivery mechanism for this type of vulnerability. Network segmentation and application whitelisting can provide additional defense layers, while regular security audits should verify that all Visio installations have been properly patched and that no legacy versions remain in use within the organization. The vulnerability's age and the widespread use of Visio in enterprise environments make this issue particularly concerning, as many organizations may still be running unpatched versions of these applications.