CVE-2014-1243 in QuickTime
Summary
by MITRE
Apple QuickTime before 7.7.5 does not initialize an unspecified pointer, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted track list in a movie file.
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Analysis
by VulDB Data Team • 04/12/2025
The vulnerability identified as CVE-2014-1243 affects Apple QuickTime media player versions prior to 7.7.5, representing a critical memory safety issue that enables remote code execution through malformed media files. This flaw resides in the handling of track lists within movie files, where an unspecified pointer fails to be properly initialized during the parsing process. The vulnerability stems from inadequate input validation and memory management practices within the QuickTime framework, creating a pathway for malicious actors to craft specially designed movie files that exploit this uninitialized pointer condition. Such attacks can be delivered through various vectors including email attachments, web downloads, or malicious websites that serve compromised QuickTime content to unsuspecting users.
The technical nature of this vulnerability aligns with CWE-457, which describes "Use of Uninitialized Variable" in software development practices. When QuickTime processes a crafted movie file containing an improperly structured track list, the uninitialized pointer can contain arbitrary memory contents that, when dereferenced during normal playback operations, lead to unpredictable behavior. This uninitialized memory access creates a condition where attackers can manipulate the execution flow of the application by carefully constructing the malicious file to control the pointer's value. The vulnerability's remote exploitation capability means that no local user interaction is required beyond opening the malicious file, making it particularly dangerous in phishing campaigns or web-based attacks. The lack of proper bounds checking and memory initialization during track list parsing creates multiple potential attack surfaces that can be leveraged for arbitrary code execution or system crashes.
The operational impact of CVE-2014-1243 extends beyond simple denial of service scenarios, as successful exploitation can result in complete system compromise. Attackers can leverage this vulnerability to execute arbitrary code with the privileges of the QuickTime process, potentially leading to privilege escalation or persistent backdoor installation. The vulnerability affects systems running vulnerable QuickTime versions across multiple operating systems including macOS and Windows platforms, making it a widespread concern for enterprise environments. The attack surface is particularly concerning given QuickTime's integration into various web browsers and email clients, where users may unknowingly trigger the exploit through routine activities such as opening email attachments or visiting compromised websites. Organizations with legacy systems or those unable to immediately patch may face significant risk due to the remote nature of this vulnerability and its potential for automated exploitation.
Mitigation strategies for CVE-2014-1243 primarily focus on immediate patch deployment and system hardening measures. Apple released QuickTime 7.7.5 as a direct fix for this vulnerability, which properly initializes the affected pointer and implements additional input validation for track list structures. Organizations should prioritize patch management procedures to ensure all systems running vulnerable QuickTime versions receive the update immediately. Network-level defenses including web application firewalls and content filtering systems can help prevent the delivery of malicious QuickTime files through email or web channels. Additionally, implementing application whitelisting policies that restrict execution of unauthorized QuickTime versions can provide an additional layer of protection. The vulnerability's characteristics align with ATT&CK technique T1203, which covers "Exploitation for Client Execution," and organizations should consider this when developing their incident response procedures and security monitoring capabilities to detect potential exploitation attempts. Regular security assessments and penetration testing should include verification of QuickTime installations to ensure proper patch levels are maintained across all endpoints.