CVE-2008-4522 in JMweb MP3 Music Audio Search
Summary
by MITRE
Multiple directory traversal vulnerabilities in JMweb MP3 Music Audio Search and Download Script allow remote attackers to include and execute arbitrary local files via a .. (dot dot) in the src parameter to (1) listen.php and (2) download.php.
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Analysis
by VulDB Data Team • 11/06/2024
The vulnerability identified as CVE-2008-4522 represents a critical directory traversal flaw affecting the JMweb MP3 Music Audio Search and Download Script version 1.0. This security weakness resides in the script's handling of user-supplied input through the src parameter in two key files: listen.php and download.php. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly restrict file path traversal sequences, allowing malicious actors to manipulate the application's file access behavior. The flaw specifically exploits the absence of proper path normalization and validation checks when processing the .. (dot dot) sequences that indicate parent directory access in file system paths.
From a technical perspective, the vulnerability operates by enabling attackers to construct malicious file paths that bypass intended access controls and navigate to arbitrary locations within the server's file system. When the application processes the src parameter without adequate sanitization, it directly incorporates user input into file inclusion operations, creating opportunities for unauthorized file access and execution. The attack vector specifically targets the application's audio file handling functionality, where the src parameter is expected to reference legitimate audio files within the designated media directory. However, the lack of proper input validation allows attackers to specify paths that traverse outside the intended directory boundaries, potentially accessing sensitive system files, configuration data, or other resources that should remain protected from public access.
The operational impact of this vulnerability extends beyond simple unauthorized file access to encompass potential remote code execution capabilities, depending on the server configuration and file permissions. Attackers can leverage this flaw to access sensitive information such as database connection credentials, application configuration files, or even system-level files that could provide footholds for further exploitation. The vulnerability affects the script's core functionality by undermining the integrity of its file access controls, potentially allowing malicious actors to download or play audio files from unintended locations or execute arbitrary code on the server if the application has sufficient privileges to execute files. This creates a significant risk for web applications that host user-generated content or media files, as the vulnerability can be exploited to gain unauthorized access to the underlying server infrastructure.
Security professionals should address this vulnerability by implementing proper input validation and sanitization measures that prevent directory traversal sequences from being processed. The recommended mitigation strategies include implementing strict path validation that ensures all file paths remain within designated directories, employing proper input sanitization techniques that filter out or escape potentially malicious sequences, and implementing least privilege access controls for the application's file system operations. This vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, and represents a classic example of path traversal attacks that have been consistently documented in the cybersecurity community. Organizations should also consider implementing web application firewalls and input validation controls that can detect and block suspicious path traversal attempts before they can be processed by vulnerable applications. The remediation efforts should focus on ensuring that all user-supplied input is properly validated and that the application operates within well-defined security boundaries to prevent unauthorized file system access.
The attack surface for this vulnerability is particularly concerning given the nature of audio search and download applications, which typically require extensive file system access and often operate with elevated privileges. The vulnerability demonstrates the importance of proper input validation in web applications and highlights how seemingly simple flaws can create significant security risks when not properly addressed. Organizations should conduct comprehensive security assessments of their web applications to identify similar directory traversal vulnerabilities that may exist in other components or third-party libraries. The remediation process should include thorough code reviews, implementation of secure coding practices, and regular security testing to prevent similar vulnerabilities from being introduced in future development cycles. This vulnerability serves as a reminder of the critical need for robust input validation and access control mechanisms in web applications that handle file system operations.