CVE-2014-1251 in QuickTime
Summary
by MITRE
Buffer overflow in Apple QuickTime before 7.7.5 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted clef atom in a movie file.
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Analysis
by VulDB Data Team • 04/12/2025
The vulnerability identified as CVE-2014-1251 represents a critical buffer overflow flaw within Apple QuickTime media player software affecting versions prior to 7.7.5. This security weakness resides in the handling of media file atoms, specifically the clef atom which is part of the structured media file format used by QuickTime. The flaw manifests when the application processes malformed media files containing specially crafted clef atoms that exceed allocated buffer boundaries during parsing operations. This buffer overflow condition creates an opportunity for remote code execution or system instability through application crash scenarios. The vulnerability is particularly concerning as it enables attackers to deliver malicious media content through various attack vectors including email attachments, web downloads, or malicious websites that users might inadvertently open with QuickTime player.
The technical implementation of this vulnerability stems from inadequate input validation within the QuickTime media parser component. When the application encounters a clef atom within a movie file, it attempts to parse the atom data without sufficient bounds checking mechanisms to prevent buffer overflows. The clef atom, which typically contains color lookup table information for video processing, can be manipulated to contain oversized data payloads that exceed the expected buffer size allocated for atom data storage. This insufficient boundary validation creates a condition where memory corruption occurs, potentially allowing attackers to overwrite adjacent memory locations with malicious code sequences or manipulate program execution flow. The flaw aligns with CWE-121, which categorizes buffer overflow conditions that occur when insufficient space is allocated for data, and CWE-125, which addresses out-of-bounds read conditions that can lead to memory corruption. From an attack perspective, this vulnerability maps to ATT&CK technique T1203, which involves exploitation of software vulnerabilities through buffer overflow attacks that can result in arbitrary code execution.
The operational impact of CVE-2014-1251 extends beyond simple application crashes to encompass potential remote code execution capabilities that could enable full system compromise. Attackers leveraging this vulnerability could craft malicious movie files that, when opened by an affected QuickTime version, would execute arbitrary code with the privileges of the user running the application. This could lead to unauthorized access, data exfiltration, system persistence mechanisms, or further lateral movement within network environments. The vulnerability's remote exploitability means that users do not need physical access to target systems, as malicious media content could be delivered through various attack vectors including phishing emails, compromised websites, or social engineering campaigns. Organizations running older versions of QuickTime are particularly at risk since the vulnerability affects widely deployed media player software used across multiple operating systems including macOS and Windows platforms. The potential for widespread exploitation makes this vulnerability particularly dangerous in enterprise environments where users frequently open media attachments or visit untrusted websites.
Mitigation strategies for CVE-2014-1251 primarily focus on immediate software updates and operational security measures. The most effective remediation involves upgrading to Apple QuickTime version 7.7.5 or later, which includes proper bounds checking and input validation for clef atom processing. Organizations should implement automated patch management systems to ensure all affected systems receive updates promptly, as the vulnerability affects legacy software versions that may not receive regular updates. Network security controls such as content filtering and sandboxing mechanisms can provide additional protection layers by preventing users from accessing potentially malicious media files. Security awareness training should emphasize the dangers of opening unknown media attachments and visiting untrusted websites that could contain malicious QuickTime content. System administrators should also consider implementing application whitelisting policies that restrict the execution of unauthorized QuickTime versions, particularly in high-security environments where the risk of exploitation is elevated. Regular vulnerability scanning and penetration testing should include checks for outdated QuickTime installations to identify and remediate vulnerable systems before they can be exploited by threat actors. The remediation process should also include monitoring network traffic for suspicious QuickTime-related activity and implementing intrusion detection systems that can identify potential exploitation attempts targeting this specific vulnerability.