CVE-2010-4386 in RealPlayer
Summary
by MITRE
RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.4, Linux RealPlayer 11.0.2.1744, and possibly HelixPlayer 1.0.6 and other versions, allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted RealMedia video file.
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Analysis
by VulDB Data Team • 10/07/2021
The vulnerability identified as CVE-2010-4386 represents a critical heap memory corruption flaw affecting multiple versions of RealNetworks RealPlayer software across different platforms. This security issue impacts RealPlayer versions 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.4, Linux RealPlayer 11.0.2.1744, and potentially HelixPlayer 1.0.6 and related versions. The flaw manifests when these media players process specially crafted RealMedia video files, creating a dangerous attack vector for remote threat actors. The vulnerability falls under the category of heap-based buffer overflows as classified by CWE-119, which specifically addresses memory safety issues where data is written beyond the boundaries of allocated heap memory regions.
The technical exploitation of this vulnerability occurs through the improper handling of media file structures during the parsing process. When a maliciously crafted RealMedia file is opened by an affected RealPlayer version, the software's media decoder fails to properly validate input data, leading to memory corruption in the heap allocation space. This memory corruption can result in arbitrary code execution with the privileges of the user running the affected software, or alternatively cause a denial of service through application crashes. The flaw demonstrates characteristics consistent with heap overflow vulnerabilities as defined in the CWE taxonomy, where attackers can manipulate memory layout to execute malicious code or cause system instability.
From an operational perspective, this vulnerability presents significant risks to end users and enterprise environments that rely on RealPlayer for media playback. The remote attack nature means that threat actors can exploit this flaw without requiring physical access to target systems, making it particularly dangerous in corporate environments where users might inadvertently open malicious media files from email attachments, web downloads, or compromised websites. The vulnerability affects multiple platforms including Windows and Linux systems, broadening its potential impact. The heap memory corruption can lead to complete system compromise when successful, as attackers can leverage the arbitrary code execution capability to install malware, establish backdoors, or escalate privileges within the affected system.
Organizations should implement immediate mitigations including disabling RealPlayer functionality in environments where it is not required, applying available vendor patches if they exist, and implementing network-based controls such as content filtering to prevent access to untrusted media files. The vulnerability aligns with ATT&CK technique T1203 - Exploitation for Client Execution, which describes how attackers use software vulnerabilities to execute malicious code on target systems. Network administrators should consider implementing sandboxing solutions for media file processing and conducting regular security assessments to identify systems running vulnerable versions. Additionally, user education regarding the dangers of opening untrusted media files and maintaining updated software versions remains critical in defending against this type of exploit. The vulnerability demonstrates the importance of proper input validation and memory management practices in multimedia applications, highlighting the need for robust software security engineering processes that address heap-based memory corruption issues as outlined in industry best practices for secure coding standards.