CVE-2009-1539 in Windows
Summary
by MITRE
The QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0 through 9.0c on Windows 2000 SP4, Windows XP SP2 and SP3, and Windows Server 2003 SP2 does not properly validate unspecified size fields in QuickTime media files, which allows remote attackers to execute arbitrary code via a crafted file, aka "DirectX Size Validation Vulnerability."
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Analysis
by VulDB Data Team • 04/13/2025
The vulnerability identified as CVE-2009-1539 represents a critical buffer overflow condition within the QuickTime Movie Parser Filter component of Microsoft DirectX versions 7.0 through 9.0c. This flaw exists in the quartz.dll library that forms part of the DirectShow framework, which serves as Microsoft's multimedia framework for Windows operating systems. The vulnerability specifically affects Windows 2000 SP4, Windows XP SP2 and SP3, and Windows Server 2003 SP2 platforms, making it a widespread issue across multiple server and desktop operating system versions. The vulnerability operates at the core of multimedia processing within Windows, where the parser fails to adequately validate size fields within QuickTime media files, creating a potential attack vector that could be exploited by malicious actors.
The technical exploitation of this vulnerability stems from improper input validation within the QuickTime file parsing mechanism. When the DirectShow framework processes QuickTime media files through the quartz.dll component, it encounters unspecified size fields that should be carefully validated before processing. The parser does not properly check these size parameters, allowing attackers to craft malicious QuickTime files with oversized or malformed size fields. When the vulnerable system attempts to parse these crafted files, the insufficient validation leads to buffer overflow conditions that can be leveraged to execute arbitrary code with the privileges of the user running the application. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and represents a classic example of improper input validation leading to memory corruption.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the ability to gain complete system compromise when the malicious QuickTime files are processed by vulnerable systems. The vulnerability affects a core multimedia framework component that is frequently used across various Windows applications, including web browsers, media players, and email clients that may automatically process embedded multimedia content. Attackers can exploit this vulnerability through various vectors including email attachments, web downloads, or malicious websites that deliver crafted QuickTime files. The remote exploitation capability means that attackers do not need physical access to the target system, making this vulnerability particularly dangerous in enterprise environments where users may encounter malicious content from untrusted sources. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation for execution through the use of malicious files that trigger code execution in legitimate applications.
Mitigation strategies for this vulnerability involve multiple layers of protection that address both immediate remediation and long-term security posture enhancement. Microsoft released security patches through Windows Update and the Security Bulletin MS09-023 that addressed this specific vulnerability by implementing proper size field validation within the QuickTime parser. System administrators should prioritize immediate patch deployment across all affected systems, particularly in enterprise environments where the attack surface is larger and the potential for widespread compromise is greater. Additional protective measures include implementing application whitelisting policies that restrict execution of unauthorized QuickTime processing components, configuring email and web filters to block suspicious QuickTime file attachments, and monitoring network traffic for potential exploitation attempts. Organizations should also consider disabling automatic media playback in web browsers and email clients to reduce the attack surface. The vulnerability demonstrates the importance of proper input validation in multimedia processing frameworks and highlights the need for regular security assessments of core system components that handle external data processing, particularly those that are frequently accessed by end users and commonly targeted by attackers.