CVE-2014-3442 in WinAmp
Summary
by MITRE
Winamp 5.666 and earlier allows remote attackers to cause a denial of service (memory corruption and crash) via a malformed .FLV file, related to f263.w5s.
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Analysis
by VulDB Data Team • 07/27/2025
The vulnerability identified as CVE-2014-3442 represents a critical memory corruption flaw within Winamp media player versions 5.666 and earlier. This issue manifests through the processing of malformed .FLV video files, specifically when the f263.w5s plugin is invoked during media playback. The flaw resides in how the application handles certain malformed input data, creating a condition where memory corruption occurs during the decoding process. This type of vulnerability falls under the category of buffer overflow conditions and memory safety issues, which are commonly classified under CWE-121 for buffer overflow and CWE-125 for out-of-bounds read conditions.
The technical execution of this vulnerability requires an attacker to craft a specially formatted .FLV file that triggers the f263.w5s plugin within Winamp's architecture. When the vulnerable player attempts to process this malformed file, the application's memory management mechanisms fail to properly handle the unexpected data structure, leading to arbitrary memory corruption. This corruption typically manifests as an application crash or complete system instability, effectively creating a denial of service condition that prevents legitimate users from accessing media content through the affected software. The attack vector is remote, meaning users can be compromised simply by opening or previewing the malicious file, making this particularly dangerous in shared or public environments.
From an operational perspective, this vulnerability presents significant risks to end-user systems and enterprise environments where Winamp is deployed. The denial of service impact extends beyond simple application disruption, as it can potentially be exploited to cause system instability or even provide a foothold for more sophisticated attacks. The vulnerability affects a widely used media player application, increasing its potential impact across diverse user bases. Security professionals should note that this flaw represents a classic example of how multimedia processing libraries can become attack surfaces, particularly when they lack proper input validation and memory boundary checking mechanisms. The vulnerability demonstrates the importance of input sanitization and robust error handling in media processing applications, which aligns with ATT&CK technique T1203 for exploitation for persistence and T1499 for network denial of service.
Mitigation strategies for CVE-2014-3442 should prioritize immediate patching of affected Winamp installations, as version 5.667 and later contain fixes for this specific memory corruption issue. System administrators should implement network-level controls to block .FLV file transfers from untrusted sources and consider deploying application whitelisting policies that restrict execution of vulnerable media player versions. Additional protective measures include configuring automatic updates for media applications, implementing sandboxing techniques for media processing, and establishing monitoring protocols to detect unusual application crash patterns. Organizations should also consider migrating to more modern media players that have better memory safety features and regular security updates. The vulnerability highlights the necessity of maintaining up-to-date software across all systems and the importance of security testing for multimedia applications to prevent similar issues in the future.