CVE-2003-0906 in Windows
Summary
by MITRE
Buffer overflow in the rendering for (1) Windows Metafile (WMF) or (2) Enhanced Metafile (EMF) image formats in Microsoft Windows NT 4.0 SP6a, 2000 SP2 through SP4, and XP SP1 allows remote attackers to execute arbitrary code via a malformed WMF or EMF image.
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Analysis
by VulDB Data Team • 01/02/2025
The vulnerability described in CVE-2003-0906 represents a critical buffer overflow flaw affecting Microsoft Windows operating systems including Windows nt 4.0 service pack 6a, windows 2000 service packs 2 through 4, and windows xp service pack 1. this vulnerability specifically targets the rendering engine responsible for processing windows metafile and enhanced metafile image formats which are commonly used for vector graphics in windows applications and operating system components. the flaw occurs when the system attempts to process malformed image files that contain oversized data structures or improperly formatted metadata that exceed the allocated buffer space during the rendering process. this particular vulnerability falls under the common weakness enumeration category of buffer overflow as classified by cwe-121, which represents a fundamental software security issue where more data is written to a buffer than it can hold, leading to memory corruption and potential code execution.
the operational impact of this vulnerability is severe as it enables remote attackers to execute arbitrary code on affected systems simply by tricking a user into opening a maliciously crafted wmf or emf file. the attack vector typically involves delivering the malicious image file through email attachments, web downloads, or file sharing networks where users might unknowingly open the file with windows applications that process these image formats. when the vulnerable rendering engine encounters the malformed image data, the buffer overflow corrupts adjacent memory locations and can overwrite critical program execution pointers or return addresses, allowing attackers to redirect program flow to malicious code injected into the buffer space. this type of vulnerability aligns with the attack technique described in the mitre attack framework under the tactic of execution and specifically relates to techniques involving malicious file execution and code injection.
the exploitation of this vulnerability demonstrates how image format processing can serve as an attack surface for privilege escalation and remote code execution attacks, particularly in enterprise environments where users may encounter untrusted image files from various sources. organizations running affected windows versions face significant risk as this vulnerability can be leveraged for complete system compromise without requiring user interaction beyond opening the malicious file. the vulnerability's persistence across multiple windows versions highlights the complexity of addressing such fundamental rendering engine flaws and underscores the importance of maintaining up-to-date security patches. mitigation strategies should include immediate deployment of microsoft security updates, implementation of email filtering and web content filtering to prevent execution of untrusted image files, and user education regarding the dangers of opening unknown or untrusted image attachments. additionally, system administrators should consider implementing application whitelisting policies to restrict the execution of image processing applications and employ network segmentation to limit the potential impact of successful exploitation attempts. the vulnerability also emphasizes the necessity of secure coding practices in graphics rendering engines and the importance of input validation for all external data sources to prevent similar issues in future software development cycles.