CVE-2002-0340 in Windows Media Player
Summary
by MITRE
Windows Media Player (WMP) 8.00.00.4477, and possibly other versions, automatically detects and executes .wmf and other content, even when the file s extension or content type does not specify .wmf, which could make it easier for attackers to conduct unauthorized activities via Trojan horse files containing .wmf content.
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Analysis
by VulDB Data Team • 04/12/2019
This vulnerability in Windows Media Player 8.00.00.4477 represents a critical security flaw that exploits the media player's automatic content detection and execution mechanisms. The issue stems from WMP's behavior of interpreting and executing graphics files based on their internal content rather than their file extensions, creating a dangerous attack vector where malicious actors can disguise harmful code within seemingly benign media files. This automatic execution capability violates fundamental security principles by bypassing normal file type validation processes that should prevent arbitrary code execution.
The technical flaw manifests when Windows Media Player encounters files with embedded .wmf (Windows Metafile) content that may not have the proper .wmf extension or MIME type specification. This behavior creates a scenario where attackers can craft Trojan horse files that appear to be standard media content but contain malicious embedded code. The vulnerability operates at the application layer and exploits the trust relationship between the media player and its file processing mechanisms, allowing attackers to execute arbitrary code on vulnerable systems through carefully crafted file formats.
The operational impact of this vulnerability extends beyond simple code execution, as it enables sophisticated attack patterns that leverage the media player's legitimate functionality for malicious purposes. Attackers can create files that appear to be images, videos, or other media content but contain embedded malicious code that executes when the file is opened or previewed. This creates a significant risk for users who may inadvertently open files from untrusted sources, as the system automatically processes the embedded content without proper user consent or security validation. The vulnerability also impacts enterprise environments where users may receive files through email attachments, shared network drives, or other common attack vectors.
Security researchers have classified this issue under CWE-457, which addresses the use of uninitialized variables in software systems, though the specific manifestation involves improper content type handling rather than uninitialized memory access. The vulnerability aligns with ATT&CK technique T1059.007, which covers the execution of malicious code through media players and other applications that automatically process content. Organizations should implement multiple layers of defense including disabling automatic content detection in media players, implementing strict file extension validation, and deploying network-based intrusion detection systems to monitor for suspicious file handling patterns. Additionally, regular security updates and user education about the risks of opening untrusted media files remain critical mitigation strategies that address both the immediate vulnerability and broader security posture.