CVE-2012-3234 in RealPlayer
Summary
by MITRE
RealNetworks RealPlayer before 15.0.6.14, RealPlayer SP 1.0 through 1.1.5, and Mac RealPlayer before 12.0.1.1750 do not properly handle codec frame sizes in RealAudio files, which allows remote attackers to cause a denial of service (divide-by-zero error and application crash) or possibly have unspecified other impact via a crafted file.
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Analysis
by VulDB Data Team • 04/13/2021
The vulnerability identified as CVE-2012-3234 represents a critical software flaw within RealNetworks RealPlayer multimedia applications across multiple platforms and versions. This issue affects desktop versions of RealPlayer including the standard 15.0.6.14 and earlier releases, RealPlayer SP 1.0 through 1.1.5, and Mac RealPlayer versions prior to 12.0.1.1750. The flaw stems from inadequate validation of codec frame sizes within RealAudio file processing mechanisms, creating a potential vector for remote exploitation that can result in system instability and service disruption.
The technical root cause of this vulnerability lies in the improper handling of audio codec parameters during file parsing operations. When RealPlayer encounters a specially crafted RealAudio file with malformed frame size specifications, the application fails to properly validate these parameters before processing them. This validation failure leads to a divide-by-zero error condition when the software attempts to calculate frame dimensions or perform mathematical operations based on the corrupted frame size data. The divide-by-zero scenario triggers an unhandled exception that causes the application to crash abruptly, resulting in a denial of service condition that prevents legitimate users from accessing audio content.
From an operational perspective, this vulnerability presents significant risks to both individual users and enterprise environments that rely on RealPlayer for multimedia content delivery. The remote exploitation capability means that attackers can potentially compromise systems without requiring local access or user interaction beyond opening a malicious file. The impact extends beyond simple service disruption as the vulnerability may enable more severe consequences including potential code execution or information disclosure depending on the specific implementation details. According to CWE classification, this vulnerability maps to CWE-369: Divide by Zero, which specifically addresses the dangerous practice of performing division operations without proper input validation. The ATT&CK framework categorizes this as a Denial of Service attack vector through software exploitation, specifically targeting application stability and availability.
The exploitability of this vulnerability is enhanced by the widespread adoption of RealPlayer across various operating systems and the typical user behavior of opening multimedia files from untrusted sources. Attackers can craft malicious RealAudio files that appear legitimate but contain carefully constructed frame size parameters designed to trigger the divide-by-zero condition. The vulnerability affects not only individual users but also organizations that may have deployed RealPlayer as part of their multimedia infrastructure, potentially creating cascading service disruptions. Organizations should consider the broader implications of this vulnerability within their network security posture, particularly in environments where multimedia content is frequently accessed and processed.
Effective mitigation strategies for CVE-2012-3234 require immediate software updates to the patched versions of RealPlayer that properly validate codec frame sizes before processing. System administrators should implement network-based controls to restrict access to potentially malicious multimedia content and deploy application whitelisting policies that prevent unauthorized RealPlayer installations. Additionally, users should be educated about the risks of opening untrusted multimedia files and the importance of keeping software updated. The vulnerability serves as a reminder of the critical importance of input validation in multimedia processing applications and the need for robust error handling mechanisms to prevent exploitation through malformed data inputs. Organizations should also consider implementing network segmentation and monitoring to detect potential exploitation attempts targeting this and similar vulnerabilities in their infrastructure.