CVE-2003-0053 in Quicktime Streaming Server
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in parse_xml.cgi in Apple Darwin Streaming Administration Server 4.1.2 and QuickTime Streaming Server 4.1.1 allows remote attackers to insert arbitrary script via the filename parameter, which is inserted into an error message.
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Analysis
by VulDB Data Team • 08/25/2025
The CVE-2003-0053 vulnerability represents a classic cross-site scripting flaw in Apple's streaming server software, specifically affecting Darwin Streaming Administration Server 4.1.2 and QuickTime Streaming Server 4.1.1. This vulnerability resides in the parse_xml.cgi component which processes XML data and handles filename parameters without proper input validation or sanitization. The flaw enables remote attackers to inject malicious scripts into error messages displayed to users, creating a persistent vector for exploitation across multiple client sessions.
The technical implementation of this vulnerability stems from inadequate input sanitization within the server-side processing logic. When the filename parameter is passed to parse_xml.cgi, the system fails to properly escape or validate user-supplied data before incorporating it into error messages. This creates an environment where attacker-controlled input can be executed within the context of a victim's browser session, fundamentally violating the principle of proper input validation and output encoding. The vulnerability is classified as CWE-79, which specifically addresses cross-site scripting flaws in web applications and server-side components that handle user input.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to hijack user sessions, steal sensitive information, or redirect victims to malicious websites. Since the vulnerable component is part of streaming server infrastructure, attackers could potentially exploit this flaw in environments where users interact with streaming content or administrative interfaces. The remote nature of the attack means that exploitation does not require local system access, making it particularly dangerous for publicly accessible streaming servers. This vulnerability aligns with ATT&CK technique T1566, which describes social engineering attacks involving malicious content delivery through web applications.
Mitigation strategies for CVE-2003-0053 should focus on implementing comprehensive input validation and output encoding mechanisms. Organizations should immediately apply vendor patches if available, as Apple would have released fixes for this vulnerability in their subsequent software versions. Additionally, implementing proper parameter sanitization in the parse_xml.cgi script would prevent user-supplied data from being directly embedded into error messages without appropriate escaping. Network-level protections such as web application firewalls and intrusion detection systems can help detect and block malicious payloads attempting to exploit this vulnerability. Regular security assessments of streaming server configurations and input validation processes should be conducted to prevent similar flaws from emerging in other components of the streaming infrastructure.