CVE-2007-4706 in QuickTime
Summary
by MITRE
Heap-based buffer overflow in Apple QuickTime before 7.3.1 allows remote attackers to execute arbitrary code via a crafted QTL file.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/01/2019
The vulnerability identified as CVE-2007-4706 represents a critical heap-based buffer overflow in Apple QuickTime software versions prior to 7.3.1. This flaw exists within the media processing capabilities of QuickTime, specifically when handling QTL (QuickTime Link) files that contain maliciously crafted data structures. The vulnerability stems from insufficient input validation and bounds checking during the parsing of QTL file formats, creating an exploitable condition where attacker-controlled data can overwrite adjacent memory locations in the heap allocation space. Such buffer overflows typically occur when the application attempts to write more data into a heap-allocated buffer than it can accommodate, leading to memory corruption that adversaries can leverage for code execution.
The technical implementation of this vulnerability involves the improper handling of QTL file structures that contain embedded media links and metadata. When QuickTime processes these files, it allocates heap memory to store parsed data elements without adequate verification of input boundaries. Attackers can construct malicious QTL files with oversized data fields or malformed structures that trigger the buffer overflow condition. The heap-based nature of this vulnerability means that memory corruption affects the application's dynamic memory allocation regions, making exploitation more complex but potentially more reliable than stack-based overflows. This type of vulnerability maps directly to CWE-122, which describes heap-based buffer overflow conditions, and falls under the broader category of memory safety issues that compromise application integrity.
The operational impact of CVE-2007-4706 extends beyond simple code execution, as it enables remote attackers to gain arbitrary code execution capabilities on vulnerable systems. This vulnerability is particularly dangerous because it operates in a remote attack scenario, meaning users can be compromised simply by opening or viewing a malicious QTL file, either through web browsers, email attachments, or file sharing platforms. The attack vector typically involves social engineering campaigns where users are tricked into downloading and opening malicious files, potentially leading to complete system compromise. The vulnerability affects multiple operating systems including various versions of macOS and Windows that support QuickTime, creating a wide attack surface. This aligns with ATT&CK technique T1203, which describes exploitation of remote services and applications, and demonstrates how media processing applications can serve as attack vectors for privilege escalation and persistent access.
Mitigation strategies for CVE-2007-4706 focus primarily on immediate software updates and patch management procedures. Apple released QuickTime 7.3.1 to address this vulnerability, which included enhanced input validation and memory boundary checking mechanisms. Organizations should implement comprehensive patch management policies to ensure all systems running QuickTime are updated to versions that contain the necessary security fixes. Additional protective measures include disabling QuickTime plugin support in web browsers, implementing content filtering systems to block suspicious QTL files, and establishing network monitoring to detect potential exploitation attempts. Security administrators should also consider deploying application whitelisting solutions that restrict execution of untrusted media files and configure sandboxing environments to limit the impact of potential exploitation. The vulnerability serves as a prime example of why regular security assessments and vulnerability management programs are essential for maintaining secure computing environments, particularly for applications that process untrusted media content.