CVE-2013-4973 in RealPlayer
Summary
by MITRE
Stack-based buffer overflow in RealNetworks RealPlayer before 16.0.3.51, and RealPlayer SP 1.0 through 1.1.5, allows remote attackers to execute arbitrary code via a crafted .rmp file.
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Analysis
by VulDB Data Team • 08/16/2024
The vulnerability identified as CVE-2013-4973 represents a critical stack-based buffer overflow flaw affecting RealNetworks RealPlayer software across multiple versions including RealPlayer before 16.0.3.51 and RealPlayer SP 1.0 through 1.1.5. This vulnerability resides within the media player's handling of crafted .rmp files, which are RealNetworks' proprietary media container format designed for streaming and playback of audio and video content. The flaw stems from insufficient input validation and bounds checking within the application's parsing logic for these specific file formats, creating a pathway for malicious actors to exploit the software's memory management mechanisms.
The technical implementation of this vulnerability involves the manipulation of specially crafted .rmp files that contain malicious data structures designed to overflow the allocated stack buffer during file parsing operations. When RealPlayer attempts to process these malformed files, the insufficient boundary checks allow an attacker to overwrite adjacent memory locations including return addresses and control data on the stack. This memory corruption directly enables arbitrary code execution capabilities, allowing remote attackers to inject and execute malicious code within the context of the vulnerable application's process. The vulnerability operates at the application layer and requires no special privileges beyond the ability to deliver a malicious file to a target system, making it particularly dangerous in phishing and drive-by download scenarios.
The operational impact of CVE-2013-4973 extends beyond simple code execution to encompass complete system compromise potential, as the vulnerability exists in a widely deployed media player application that users frequently interact with. Attackers can leverage this vulnerability through various delivery mechanisms including email attachments, compromised websites, or malicious download sources, making it a prime target for mass exploitation campaigns. The vulnerability's classification aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions where the attacker can control the amount of data written to the buffer. This type of vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 Command and Scripting Interpreter and T1203 Exploitation for Client Execution, where attackers exploit application vulnerabilities to execute malicious code on target systems.
The exploitation of this vulnerability requires minimal technical expertise from attackers, as it leverages well-established buffer overflow techniques that have been documented in cybersecurity literature for decades. The widespread adoption of RealPlayer across various operating systems including windows platforms made this vulnerability particularly attractive to threat actors seeking to maximize their exploitation reach. Organizations running affected versions of RealPlayer faced significant risk exposure, as the vulnerability could be exploited remotely without user interaction beyond opening the malicious file, though user awareness and behavior remained critical factors in successful exploitation attempts. The vulnerability's impact is further amplified by the fact that RealPlayer was commonly installed on end-user systems and often ran with elevated privileges, potentially allowing attackers to achieve higher levels of system compromise beyond simple application-level code execution.
Mitigation strategies for CVE-2013-4973 centered primarily on immediate software updates and patches provided by RealNetworks to address the underlying buffer overflow vulnerability. System administrators were advised to implement mandatory patch deployment procedures and verify that all affected RealPlayer installations were updated to versions 16.0.3.51 or later, which contained the necessary memory safety improvements. Additional protective measures included network-level filtering to block .rmp file attachments and content from untrusted sources, application whitelisting to restrict execution of unauthorized media player versions, and user education campaigns to raise awareness about the risks of opening unknown media files. The vulnerability also highlighted the importance of regular software maintenance and security assessments, particularly for widely used applications that handle multimedia content and are frequently targeted by cyber attackers seeking to exploit memory corruption vulnerabilities in media processing applications.