CVE-2003-0424 in QuickTime
Summary
by MITRE
Apple QuickTime / Darwin Streaming Server before 4.1.3f allows remote attackers to obtain the source code for scripts by appending encoded space (%20) or . (%2e) characters to an HTTP request for the script, e.g. view_broadcast.cgi.
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Analysis
by VulDB Data Team • 08/15/2025
The vulnerability identified as CVE-2003-0424 represents a critical directory traversal flaw affecting Apple QuickTime and Darwin Streaming Server versions prior to 4.1.3f. This security weakness stems from inadequate input validation within the HTTP request processing mechanism of these media streaming platforms. The vulnerability specifically manifests when the server fails to properly sanitize user-supplied input containing encoded characters that should be rejected during request parsing. Attackers can exploit this flaw by crafting malicious HTTP requests that include encoded space characters %20 or encoded dot characters %2e in the requested script paths, effectively bypassing normal access controls and gaining unauthorized access to server-side script files.
The technical exploitation of this vulnerability leverages fundamental weaknesses in path normalization and input sanitization processes. When the streaming server processes HTTP requests containing these encoded characters, it fails to properly validate or reject the malformed paths before attempting to access the requested resources. This allows attackers to traverse the file system hierarchy and access files that should remain protected from public access. The specific target of exploitation involves the view_broadcast.cgi script and similar server-side components that handle media streaming requests. The vulnerability is classified under CWE-22 as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" and aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript', demonstrating how path traversal can lead to unauthorized code access.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with access to server-side scripts that may contain sensitive implementation details, configuration information, or even embedded credentials. The exposure of source code creates additional risks including the potential for attackers to identify other vulnerabilities within the application logic, understand the server's internal architecture, and develop more sophisticated attack vectors. This vulnerability particularly affects organizations relying on Apple's streaming solutions for media distribution, as it undermines the fundamental security assumptions of access control and file system isolation. The attack requires minimal sophistication and can be automated, making it particularly dangerous for widespread exploitation across multiple installations.
Mitigation strategies for CVE-2003-0424 focus primarily on implementing proper input validation and sanitization mechanisms within the affected server applications. Organizations should immediately upgrade to Apple QuickTime and Darwin Streaming Server version 4.1.3f or later, which contain patches addressing the directory traversal vulnerability. Additionally, administrators should implement web application firewalls that can detect and block requests containing encoded path traversal sequences, and deploy proper access controls that limit the exposure of sensitive server-side scripts. The vulnerability also underscores the importance of regular security assessments and patch management processes, as it represents a classic example of how inadequate input validation can lead to severe security consequences. Network segmentation and monitoring of HTTP traffic patterns can help detect anomalous requests that may indicate exploitation attempts. Organizations should also consider implementing principle of least privilege access controls and regularly audit server configurations to ensure that sensitive files are not unnecessarily exposed to public access.