CVE-2014-3113 in RealPlayer
Summary
by MITRE
Multiple buffer overflows in RealNetworks RealPlayer before 17.0.10.8 allow remote attackers to execute arbitrary code via a malformed (1) elst or (2) stsz atom in an MP4 file.
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Analysis
by VulDB Data Team • 12/17/2024
The vulnerability identified as CVE-2014-3113 represents a critical security flaw in RealNetworks RealPlayer software affecting versions prior to 17.0.10.8. This vulnerability manifests through multiple buffer overflow conditions that occur when processing malformed MP4 file structures, specifically within the elst and stsz atoms that define movie timing and sample size information respectively. The flaw exists in the media parsing logic that fails to properly validate input data before attempting to copy it into fixed-size memory buffers, creating opportunities for attackers to exploit these memory corruption conditions.
The technical implementation of this vulnerability stems from insufficient bounds checking during MP4 file parsing operations. When RealPlayer encounters an MP4 file containing malformed elst or stsz atoms, the application's parser does not adequately verify the length or structure of these atoms before copying their contents into internal buffers. This lack of validation allows attackers to craft specially crafted MP4 files that contain oversized or malformed atom data, which when processed by the vulnerable RealPlayer version triggers buffer overflow conditions. These buffer overflows can result in stack corruption or heap corruption depending on the specific atom being processed, ultimately leading to arbitrary code execution privileges for remote attackers.
The operational impact of CVE-2014-3113 extends beyond simple code execution capabilities to encompass significant security risks for users of affected RealPlayer installations. Attackers can leverage this vulnerability to remotely compromise systems by tricking users into opening maliciously crafted MP4 files through various attack vectors including email attachments, web downloads, or malicious websites. The vulnerability is particularly concerning because it operates at the media player level where users often have elevated privileges and the attack surface includes common file formats that users frequently encounter. This makes the exploitation highly effective and difficult to prevent through traditional network-based security controls.
From a cybersecurity framework perspective, this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflows. The attack pattern follows typical exploit development methodologies described in the MITRE ATT&CK framework under techniques such as T1203 for Exploitation for Client Execution and T1059 for Command and Scripting Interpreter. The vulnerability demonstrates the classic pattern of memory corruption exploits that have been prevalent in multimedia applications for years, highlighting the ongoing challenges in securing media processing libraries against malformed input data. Organizations should prioritize immediate patch deployment to address this vulnerability, as it represents a high-risk exposure that can lead to complete system compromise. The remediation strategy should include not only updating RealPlayer to version 17.0.10.8 or later but also implementing network-based controls to prevent access to known malicious MP4 content and conducting user awareness training to avoid opening suspicious media files.