CVE-2010-20042 in Audio Player
Summary
by MITRE • 08/20/2025
Xion Audio Player versions 1.0.126 and prior are vulnerable to a Unicode-based stack buffer overflow triggered by opening a specially crafted .m3u playlist file. The file contains an overly long string that overwrites the Structured Exception Handler (SEH) chain, allowing an attacker to hijack execution flow and run arbitrary code.
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Analysis
by VulDB Data Team • 05/26/2026
The vulnerability identified as CVE-2010-20042 affects Xion Audio Player versions prior to 10.126, representing a critical stack buffer overflow issue that exploits Unicode handling within the application's playlist processing functionality. This vulnerability specifically manifests when the player attempts to parse maliciously crafted .m3u playlist files, which are commonly used to organize and manage audio media collections. The flaw resides in the player's insufficient input validation mechanisms when processing Unicode strings in playlist metadata, creating a pathway for attackers to manipulate the application's execution flow through strategic buffer overwrites.
The technical implementation of this vulnerability leverages a Unicode-based stack buffer overflow condition that occurs during the parsing of extended playlist entries. When the vulnerable application encounters an overly long string within the .m3u file, it fails to properly validate the string length before copying it into a fixed-size stack buffer. This allows an attacker to overflow the buffer and overwrite adjacent memory locations, specifically targeting the Structured Exception Handler (SEH) chain that Windows uses for exception management. The SEH chain manipulation enables attackers to redirect program execution to malicious code injected within the overflowed buffer, effectively bypassing standard security protections.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a complete remote code execution capability that can be exploited without user interaction. The attack vector requires only that a user opens a specially crafted .m3u playlist file, making it particularly dangerous in scenarios where users might encounter malicious files through email attachments, instant messaging, or compromised websites. This vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and demonstrates how Unicode processing can create additional attack surface when proper bounds checking is not implemented. The exploitability of this vulnerability is further enhanced by the fact that it does not require any special privileges or user interaction beyond normal application usage.
Mitigation strategies for CVE-2010-20042 primarily focus on immediate software updates and input validation improvements. Users should immediately upgrade to Xion Audio Player version 1.0.126 or later, which includes proper bounds checking and Unicode string validation mechanisms. System administrators should implement application whitelisting policies to restrict execution of untrusted playlist files and consider deploying network-based intrusion detection systems that can identify malicious .m3u file patterns. The vulnerability also highlights the importance of following secure coding practices as outlined in the OWASP Secure Coding Guidelines, particularly regarding input validation and buffer management. Organizations should conduct regular security assessments of media applications and implement sandboxing techniques to limit the potential impact of such vulnerabilities. This issue represents a classic example of how legacy applications may contain unpatched buffer overflow vulnerabilities that can be exploited through seemingly benign file formats, emphasizing the critical need for continuous security maintenance and vulnerability management programs.