CVE-2004-0200 in Windows
Summary
by MITRE
Buffer overflow in the JPEG (JPG) parsing engine in the Microsoft Graphic Device Interface Plus (GDI+) component, GDIPlus.dll, allows remote attackers to execute arbitrary code via a JPEG image with a small JPEG COM field length that is normalized to a large integer length before a memory copy operation.
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Analysis
by VulDB Data Team • 07/13/2025
The vulnerability identified as CVE-2004-0200 represents a critical buffer overflow flaw within Microsoft's Graphics Device Interface Plus GDI+ component, specifically affecting the JPEG parsing engine in GDIPlus.dll. This vulnerability resides in the handling of JPEG image data structures, particularly when processing the COM (comment) field within JPEG files. The flaw manifests when the JPEG parser encounters a small COM field length value that gets normalized to a large integer during processing, creating a scenario where subsequent memory copy operations exceed allocated buffer boundaries. The vulnerability operates at the intersection of image processing and memory management within the Windows graphics subsystem, making it particularly dangerous as it can be triggered through standard image rendering operations. This issue demonstrates the inherent risks of complex image format parsing where normalization operations can introduce unexpected behavior in memory allocation and copying processes, particularly when dealing with malformed or crafted input data.
The technical exploitation of this vulnerability occurs through a carefully crafted JPEG image file that contains a COM field with a small initial length value. During the parsing process, this value undergoes normalization to a large integer, which then determines the size of memory that will be allocated for copying data. When the actual data copy operation occurs, the large normalized length value exceeds the bounds of the originally allocated buffer space, resulting in a buffer overflow condition. This overflow can be leveraged by attackers to overwrite adjacent memory locations, potentially allowing for arbitrary code execution with the privileges of the compromised process. The vulnerability is classified as a classic buffer overflow in the context of the Common Weakness Enumeration framework under CWE-121, which describes heap-based buffer overflow conditions, and more specifically aligns with CWE-787, which addresses out-of-bounds writes. The attack vector operates through the standard image rendering pipeline, making it particularly insidious as it can be triggered by simply opening a malicious image file, thus bypassing many traditional security controls.
The operational impact of this vulnerability extends far beyond simple code execution, as it enables attackers to gain complete control over affected systems running vulnerable versions of Windows. The exploitation can occur remotely through web-based attacks, email attachments, or any scenario where a JPEG image is rendered by a vulnerable application. The vulnerability affects Microsoft Windows 2000, XP, and Server 2003 systems, making it particularly concerning for enterprise environments where these older operating systems may still be in use. The attack surface is broad since GDI+ is extensively used throughout the Windows ecosystem for image processing in applications including web browsers, email clients, and document viewers. This vulnerability can be leveraged to execute malicious code with the privileges of the compromised application, potentially leading to full system compromise. The exploitability factor is high due to the ease with which malicious JPEG files can be distributed and the minimal user interaction required for exploitation. According to the MITRE ATT&CK framework, this vulnerability maps to techniques involving execution through image processing and memory corruption, specifically targeting the execution phase of attack chains.
Mitigation strategies for CVE-2004-0200 require immediate patching of affected systems with Microsoft security updates, as this vulnerability was addressed through the Microsoft Security Bulletin MS04-004 released in January 2004. Organizations should implement network segmentation and access controls to limit exposure, particularly in environments where users may encounter untrusted image content. Application whitelisting and sandboxing of image processing applications can provide additional protection layers, though these measures are secondary to proper patch management. Network-based protections such as intrusion detection systems can be configured to detect suspicious JPEG file patterns, though the attack is typically not detectable through network traffic analysis alone. Regular security assessments and vulnerability scanning should include checks for outdated GDI+ components and unpatched systems. The vulnerability highlights the importance of proper input validation and bounds checking in image processing libraries, and serves as a reminder of the critical need for regular security updates. Organizations should also consider implementing security awareness training to prevent users from opening suspicious image attachments that could exploit this vulnerability through social engineering attacks.