CVE-2009-0002 in QuickTime
Summary
by MITRE
Heap-based buffer overflow in Apple QuickTime before 7.6 allows remote attackers to cause a denial of service (application termination) and possibly execute arbitrary code via a QTVR movie file with crafted THKD atoms.
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Analysis
by VulDB Data Team • 08/26/2019
The vulnerability identified as CVE-2009-0002 represents a critical heap-based buffer overflow in Apple QuickTime software versions prior to 7.6. This flaw resides within the handling of QTVR (QuickTime VR) movie files and specifically targets the THKD atoms that define the structure and behavior of these virtual reality movie files. The vulnerability operates through a classic buffer overflow mechanism where insufficient bounds checking allows attackers to write beyond allocated memory boundaries, potentially corrupting adjacent memory structures and leading to unpredictable application behavior. The flaw affects the QuickTime media framework's parsing logic for virtual reality content, making it particularly dangerous in environments where users might encounter untrusted media files.
The technical implementation of this vulnerability involves the improper validation of atom sizes within QTVR movie files, specifically within the THKD atom structure. When QuickTime processes a maliciously crafted QTVR file, the application fails to properly validate the size field of the THKD atom before attempting to allocate memory for its contents. This validation failure allows attackers to specify an oversized size value that exceeds the bounds of the allocated buffer, resulting in memory corruption. The heap-based nature of the overflow means that the corruption occurs in the heap memory segment rather than the stack, making exploitation more complex but potentially more reliable for achieving arbitrary code execution. This type of vulnerability is categorized under CWE-121 as "Heap-based Buffer Overflow" and falls within the broader category of memory safety issues that have been extensively documented in security literature.
The operational impact of this vulnerability extends beyond simple denial of service to potentially enable remote code execution, making it a severe threat to system security. When exploited, the vulnerability can cause the targeted QuickTime application to crash and terminate unexpectedly, resulting in denial of service for users attempting to view virtual reality content. However, the more dangerous aspect involves the potential for arbitrary code execution, which could allow attackers to gain control of the affected system. The exploitation typically requires the victim to open a malicious QTVR movie file, making social engineering a common attack vector. The vulnerability affects various Apple operating systems including Mac OS X and iOS, where QuickTime is integrated into the media handling framework. This vulnerability has been mapped to ATT&CK technique T1203 as "Exploitation for Client Execution" and represents a classic example of how media processing libraries can become attack surfaces for remote code execution.
Mitigation strategies for CVE-2009-0002 primarily focus on immediate software updates and system hardening measures. The most effective solution involves upgrading to Apple QuickTime 7.6 or later versions, which contain patches specifically addressing the buffer overflow in THKD atom handling. System administrators should implement automatic update policies and ensure that all users have the latest security patches installed. Additional protective measures include restricting user access to potentially malicious media files, implementing sandboxing mechanisms for media processing applications, and monitoring for suspicious file access patterns. Network-level controls such as content filtering and email attachment scanning can help prevent the delivery of malicious QTVR files. The vulnerability demonstrates the importance of proper input validation in media processing libraries and highlights the need for comprehensive security testing of multimedia frameworks. Organizations should also consider implementing application whitelisting policies that restrict execution of untrusted media processing applications and maintain regular security assessments of their media handling infrastructure. This vulnerability serves as a reminder of the critical security considerations in multimedia processing systems and the potential for seemingly benign media files to serve as attack vectors for sophisticated exploitation techniques.