CVE-2003-0423 in QuickTime
Summary
by MITRE
parse_xml.cgi in Apple QuickTime / Darwin Streaming Server before 4.1.3g allows remote attackers to obtain the source code for parseable files via the filename parameter.
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Analysis
by VulDB Data Team • 08/16/2025
The vulnerability identified as CVE-2003-0423 affects Apple QuickTime and Darwin Streaming Server versions prior to 4.1.3g, specifically within the parse_xml.cgi component. This represents a critical security flaw that enables remote attackers to access source code of parseable files through manipulation of the filename parameter. The issue stems from inadequate input validation and improper file access controls within the server-side script that processes XML parsing requests.
The technical implementation of this vulnerability occurs through a classic path traversal or file inclusion attack vector where the filename parameter in parse_xml.cgi is not properly sanitized before being used to reference files on the server. When an attacker submits a specially crafted filename parameter, the script processes this input without sufficient validation, potentially allowing access to arbitrary files on the server filesystem. This flaw falls under the category of CWE-22 Path Traversal and CWE-23 Relative Path Traversal, which are well-documented weaknesses in web application security. The vulnerability enables attackers to retrieve sensitive source code files, configuration data, and potentially other system resources that should remain protected.
From an operational perspective, this vulnerability poses significant risks to organizations using affected Apple QuickTime and Darwin Streaming Server implementations. The ability to obtain source code creates opportunities for attackers to analyze application logic, identify additional vulnerabilities, and develop more sophisticated attack strategies. The impact extends beyond simple information disclosure as source code exposure can reveal implementation details that aid in bypassing security controls, understanding system architecture, and crafting targeted attacks against other components. This vulnerability particularly affects streaming media servers that process XML content and handle user-provided filenames, making it a serious concern for media delivery infrastructure.
Mitigation strategies for CVE-2003-0423 should prioritize immediate patching of affected systems to version 4.1.3g or later, which includes proper input validation and access control measures. Organizations should implement robust parameter validation and sanitization for all user inputs, particularly those used in file operations. Network segmentation and access controls should limit exposure of streaming server components to trusted networks only. Additionally, implementing web application firewalls and intrusion detection systems can help detect and block malicious requests attempting to exploit this vulnerability. The ATT&CK framework categorizes this as a technique involving "Path Traversal" and "Command and Scripting Interpreter" which emphasizes the need for comprehensive defensive measures including input validation, access controls, and monitoring of anomalous file access patterns. Regular security assessments and penetration testing should be conducted to ensure proper implementation of security controls and prevent similar vulnerabilities from emerging in other components of the streaming infrastructure.