CVE-2012-2396 in VLC Media Player
Summary
by MITRE
VideoLAN VLC media player 2.0.1 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted MP4 file.
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Analysis
by VulDB Data Team • 08/04/2025
The vulnerability identified as CVE-2012-2396 represents a critical denial of service flaw within VideoLAN VLC media player version 2.0.1. This issue arises from insufficient input validation mechanisms when processing specially crafted MP4 media files, creating a scenario where remote attackers can exploit the application's handling of malformed data to trigger system instability. The vulnerability specifically manifests through a divide-by-zero error condition that occurs during the parsing of maliciously constructed MP4 containers, leading to application crash and complete service unavailability for legitimate users attempting to utilize the media player functionality.
From a technical perspective, the flaw stems from the media player's inadequate error handling within its MP4 demultiplexer component, which fails to properly validate numeric values during frame rate calculations or other mathematical operations required for proper media decoding. When the VLC application encounters a crafted MP4 file containing malformed header information or corrupted data structures, the parser attempts to perform division operations using zero or invalid values, resulting in the arithmetic exception that crashes the entire application process. This type of vulnerability falls under the CWE-369 category of divide-by-zero errors, which represents a well-documented weakness in software systems where mathematical operations are performed without proper validation of divisor values, making it particularly susceptible to exploitation in multimedia processing applications.
The operational impact of this vulnerability extends beyond simple service disruption, as it creates a potential vector for denial of service attacks that can be executed remotely without requiring authentication or specialized privileges. Attackers can craft malicious MP4 files and distribute them through various channels including email attachments, web downloads, or malicious websites, allowing them to remotely compromise systems running vulnerable versions of VLC media player. The vulnerability affects any system where VLC is installed and actively processes media files, making it particularly concerning for environments where users frequently download or receive media content from untrusted sources. This flaw essentially provides attackers with a reliable method to disrupt media playback services and potentially cause broader system instability when VLC is used as a core component in media handling workflows.
Security practitioners should recognize this vulnerability as a prime example of how multimedia processing applications remain susceptible to arithmetic exceptions and input validation failures that can be exploited for denial of service purposes. The ATT&CK framework categorizes this type of vulnerability under the T1499.004 technique of network denial of service, where adversaries leverage application-level weaknesses to cause service disruption. Organizations should implement immediate mitigation strategies including updating to VLC version 2.0.2 or later, which contains the necessary patches to address the divide-by-zero error handling, and deploying network segmentation controls to limit exposure to potentially malicious media content. Additionally, system administrators should consider implementing content filtering mechanisms and user education programs to reduce the risk of accidental exploitation through social engineering attacks that distribute malicious media files. The vulnerability highlights the importance of robust input validation and error handling in multimedia applications, particularly those processing untrusted data from external sources, and serves as a reminder of the critical need for regular security updates and vulnerability management processes in media processing software ecosystems.