CVE-2003-0426 in QuickTime
Summary
by MITRE
The installation of Apple QuickTime / Darwin Streaming Server before 4.1.3f starts the administration server with a "Setup Assistant" page that allows remote attackers to set the administrator password and gain privileges before the real administrator.
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Analysis
by VulDB Data Team • 08/13/2025
The vulnerability described in CVE-2003-0426 represents a critical security flaw in Apple QuickTime and Darwin Streaming Server versions prior to 4.1.3f that fundamentally undermines the authentication and authorization mechanisms of these media streaming platforms. This issue arises from improper initialization sequence during the server setup process where the administration server begins operating before proper security configurations are established, creating a window of opportunity for malicious actors to exploit the system's vulnerable state.
The technical flaw manifests in the premature activation of the Setup Assistant page within the administration server interface, which operates without requiring authentication credentials or proper authorization checks. This allows remote attackers to access the administrative configuration interface before the legitimate administrator has completed the setup process and established proper access controls. The vulnerability specifically affects the initialization order and security state management of the streaming server components, where the system fails to enforce proper privilege separation and authentication requirements during the critical early stages of server deployment.
From an operational impact perspective, this vulnerability enables unauthorized remote attackers to gain administrative privileges on the affected systems without requiring any prior knowledge of existing passwords or authentication credentials. The attacker can simply connect to the administration server during the initial setup phase and configure the system to their advantage by setting new administrator passwords and gaining full control over the streaming server functionality. This represents a privilege escalation vulnerability that can lead to complete system compromise, data exfiltration, and potential use as a foothold for further attacks within the network infrastructure.
The vulnerability aligns with CWE-284, which addresses improper access control issues in software systems, and demonstrates how inadequate privilege management during system initialization can create persistent security weaknesses. From an adversarial perspective, this flaw maps directly to ATT&CK technique T1078.004, which involves valid accounts and legitimate access to systems, as attackers can establish administrative access through the legitimate setup process rather than through traditional exploitation methods. The security implications extend beyond immediate privilege escalation to include potential denial of service conditions, unauthorized content modification, and complete compromise of media streaming services that rely on these vulnerable server implementations.
Organizations affected by this vulnerability should immediately implement the patch provided by Apple for QuickTime and Darwin Streaming Server versions prior to 4.1.3f, which addresses the improper initialization sequence and ensures that administrative access is properly restricted during the setup phase. Additional mitigations include network segmentation to limit access to streaming server administration interfaces, implementing strict firewall rules to restrict remote access to administrative ports, and conducting comprehensive security assessments to identify any potential exploitation attempts. The vulnerability also underscores the importance of proper security hardening practices during software deployment and the critical need for authentication mechanisms to be properly enforced throughout all phases of system initialization rather than relying on temporary access controls that may be bypassed by malicious actors.