CVE-2003-0422 in QuickTime
Summary
by MITRE
Apple QuickTime / Darwin Streaming Server before 4.1.3f allows remote attackers to cause a denial of service (crash) via a request to view_broadcast.cgi that does not contain the required parameters.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 08/16/2025
The vulnerability described in CVE-2003-0422 represents a classic denial of service flaw affecting Apple QuickTime and Darwin Streaming Server versions prior to 4.1.3f. This issue specifically targets the view_broadcast.cgi component within the streaming server implementation, where the application fails to properly validate incoming HTTP requests before processing them. The flaw stems from inadequate input validation mechanisms that do not enforce the presence of required parameters necessary for legitimate operation of the broadcast viewing functionality. When remote attackers submit crafted requests lacking these essential parameters, the server processes the malformed input without proper error handling, leading to unpredictable behavior and eventual system crash. This vulnerability demonstrates a fundamental weakness in the server's request parsing and validation logic that directly impacts system availability and reliability.
The technical implementation of this vulnerability operates through a well-defined exploitation pathway that aligns with CWE-20, which describes improper input validation as a primary cause of security weaknesses. The flaw manifests when the view_broadcast.cgi script attempts to access variables or parameters that have not been properly initialized or passed in the HTTP request. This unhandled condition triggers an exception within the server's processing pipeline, causing the application to terminate unexpectedly and resulting in a complete denial of service for legitimate users attempting to access streaming content. The vulnerability affects the server's core functionality by exploiting a lack of defensive programming practices, specifically the absence of parameter validation checks that should occur before any processing begins. The impact is particularly severe because it affects the streaming server's ability to maintain continuous operation, which is critical for media delivery services.
From an operational perspective, this vulnerability creates significant risks for organizations relying on Apple QuickTime and Darwin Streaming Server for media distribution services. The remote nature of the attack means that malicious actors can exploit the flaw from anywhere on the network without requiring local access or authentication credentials, making it particularly dangerous for publicly accessible streaming servers. The denial of service condition not only disrupts legitimate user access to streaming content but also potentially affects the overall network infrastructure by consuming system resources and generating error logs that may overwhelm monitoring systems. Organizations using affected versions of the streaming server face the risk of extended service outages that can impact business operations, user satisfaction, and potentially revenue streams dependent on uninterrupted media delivery. The vulnerability's exploitation requires minimal technical expertise, making it attractive to attackers seeking to disrupt services without sophisticated attack capabilities.
The remediation approach for this vulnerability focuses on implementing proper input validation and error handling within the affected server components. Organizations should immediately upgrade to Apple QuickTime and Darwin Streaming Server version 4.1.3f or later, which includes patches addressing the parameter validation issues. The fix involves adding comprehensive checks to ensure all required parameters are present before proceeding with request processing, along with implementing graceful error handling that prevents system crashes when malformed requests are received. Additionally, network administrators should consider implementing additional security controls such as request filtering mechanisms, rate limiting, and intrusion detection systems to monitor for suspicious activity patterns. The vulnerability's characteristics align with ATT&CK technique T1499.004, which involves network denial of service attacks that target application availability through exploitation of software weaknesses. Organizations should also review their overall security posture to ensure similar validation gaps do not exist in other server components, as this represents a broader class of issues that require systematic input validation improvements across all application interfaces.