CVE-2009-4757 in EW-MusicPlayer
Summary
by MITRE
Stack-based buffer overflow in BrotherSoft EW-MusicPlayer 0.8 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long string in a malformed playlist (.m3u) file. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 05/03/2026
The vulnerability identified as CVE-2009-4757 represents a critical stack-based buffer overflow flaw within BrotherSoft EW-MusicPlayer version 0.8 that exposes the application to remote exploitation. This vulnerability specifically manifests when the music player processes malformed playlist files with extended string inputs, creating a dangerous condition that can be leveraged by remote attackers to compromise system integrity. The flaw resides in the playlist parsing functionality where insufficient input validation allows maliciously crafted data to overflow the allocated stack buffer, potentially leading to application instability or unauthorized code execution.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking permits data to overwrite adjacent memory locations. This type of vulnerability operates through the exploitation of improper input validation mechanisms within the playlist file processing module. When a malicious user crafts a specially formatted .m3u playlist file containing an excessively long string, the application fails to properly validate the input length before copying it into a fixed-size stack buffer. The overflow occurs because the program does not perform adequate boundary checks to ensure that input data fits within the allocated memory space, creating a condition where the overflow can overwrite return addresses and other critical stack data.
From an operational impact perspective, this vulnerability presents significant risks to system availability and security. The primary consequence is a potential denial of service attack that can cause the music player application to crash, rendering it unusable for legitimate users. However, the more severe implications arise from the possibility of arbitrary code execution, which could allow attackers to gain unauthorized control over the affected system. Attackers can exploit this vulnerability remotely without requiring local access, making it particularly dangerous in networked environments where multiple users may be exposed to malicious playlist files. The attack vector is particularly insidious because it can be delivered through seemingly benign playlist files that users might legitimately download or receive from trusted sources.
The exploitation of this vulnerability demonstrates characteristics consistent with ATT&CK technique T1059.007, which involves the use of script-based languages for execution. In this case, the malformed playlist serves as the delivery mechanism for malicious input that triggers the buffer overflow. The attack chain typically begins with the distribution of a crafted .m3u file through various channels such as email attachments, file sharing networks, or compromised websites. When the vulnerable application processes this file, the buffer overflow occurs, potentially allowing an attacker to inject and execute malicious code with the privileges of the running application. This creates a persistent threat that can be used for further system compromise, data exfiltration, or as a stepping stone for broader network infiltration.
Mitigation strategies for CVE-2009-4757 should focus on immediate remediation through software updates and patches provided by the vendor. System administrators should prioritize updating to patched versions of BrotherSoft EW-MusicPlayer or transitioning to alternative media players that have addressed this vulnerability. Additional protective measures include implementing input validation controls at network boundaries, deploying application whitelisting policies to prevent execution of untrusted playlist files, and conducting regular vulnerability assessments to identify similar flaws in other media applications. Network segmentation and access controls can help limit the potential impact of successful exploitation attempts, while user education about the dangers of opening unknown playlist files can reduce the likelihood of successful social engineering attacks. Organizations should also consider implementing intrusion detection systems that can identify suspicious playlist file processing activities and maintain comprehensive backup and recovery procedures to ensure rapid restoration of affected systems.