CVE-2019-19489 in SMPlayer
Summary
by MITRE
SMPlayer 19.5.0 has a buffer overflow via a long .m3u file.
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Analysis
by VulDB Data Team • 03/05/2024
The vulnerability identified as CVE-2019-19489 represents a critical buffer overflow flaw within SMPlayer version 19.5.0, a popular open-source media player application. This issue manifests when the application processes malformed or excessively long .m3u playlist files, which are commonly used to store lists of audio and video files for playback. The buffer overflow occurs during the parsing of these playlist files, specifically when the application attempts to read and process playlist entries that exceed predetermined memory allocation limits. The vulnerability stems from insufficient input validation and boundary checking mechanisms within the playlist parsing component of the media player.
The technical exploitation of this vulnerability involves crafting a malicious .m3u file containing an abnormally long string or sequence of characters that exceeds the allocated buffer space. When SMPlayer attempts to parse this malformed playlist, the application writes data beyond the boundaries of the intended memory buffer, potentially overwriting adjacent memory locations. This memory corruption can lead to unpredictable application behavior, including crashes, denial of service conditions, or in more severe cases, arbitrary code execution. The vulnerability is particularly concerning as it can be triggered through normal user interaction when opening or loading playlist files, making it exploitable in both local and remote attack scenarios.
From an operational perspective, this buffer overflow vulnerability poses significant risks to users of SMPlayer 19.5.0, particularly in environments where playlist files might be received from untrusted sources. The attack surface is broad since .m3u files are commonly shared through various channels including email attachments, file sharing platforms, and web downloads. The vulnerability can result in complete application compromise, allowing attackers to execute malicious code with the privileges of the user running SMPlayer. This aligns with CWE-121, which addresses stack-based buffer overflow conditions, and can be mapped to ATT&CK technique T1059.007 for command and scripting interpreter usage in exploitation scenarios. The impact extends beyond simple application crashes to potentially enabling more sophisticated attacks such as privilege escalation or persistent backdoor installation.
The recommended mitigations for this vulnerability include immediate upgrade to SMPlayer version 19.7.0 or later, which contains the necessary patches to address the buffer overflow issue. Users should also implement strict file validation procedures, particularly when handling playlist files from unknown or untrusted sources. Security configurations should include disabling automatic playlist loading and implementing sandboxing mechanisms for media player applications. Additionally, network administrators should consider implementing content filtering measures to prevent the distribution of potentially malicious playlist files within their environments. Regular security updates and patch management processes should be enforced to ensure all users maintain protection against similar vulnerabilities in the future. The vulnerability demonstrates the importance of proper input validation and memory management practices in multimedia applications, particularly those handling user-provided data files.