CVE-2015-3669 in QuickTime
Summary
by MITRE
QT Media Foundation in Apple QuickTime before 7.7.7 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted file, a different vulnerability than CVE-2015-3664 and CVE-2015-3665.
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Analysis
by VulDB Data Team • 05/23/2022
The vulnerability identified as CVE-2015-3669 represents a critical memory corruption flaw within Apple QuickTime's QT Media Foundation component, affecting versions prior to 7.7.7. This issue resides in the media processing framework that handles various multimedia file formats and streaming protocols, making it a prime target for remote exploitation. The vulnerability specifically manifests when the affected QuickTime player processes maliciously crafted media files, potentially leading to arbitrary code execution or system denial of service conditions. The flaw demonstrates characteristics consistent with heap-based buffer overflow conditions that can be triggered through improper input validation during media file parsing operations, creating a pathway for attackers to manipulate memory structures and execute malicious payloads.
The technical exploitation of this vulnerability occurs through the manipulation of media file headers and data structures that QuickTime's QT Media Foundation component uses to parse and decode multimedia content. Attackers can craft specially formatted files that, when opened by an affected QuickTime version, trigger memory corruption during the parsing process. This memory corruption typically involves heap overflow conditions where malicious data overwrites adjacent memory locations, potentially allowing attackers to overwrite function pointers, return addresses, or other critical program structures. The vulnerability operates at a low level within the media processing stack, making it particularly dangerous as it can be exploited through various media file formats including but not limited to mp4, mov, and other QuickTime-compatible containers. The flaw's classification aligns with CWE-121, heap-based buffer overflow, and CWE-125, out-of-bounds read, which are common entry points for privilege escalation and remote code execution attacks.
From an operational impact perspective, this vulnerability creates significant risk for organizations relying on QuickTime for media playback, particularly in environments where users may encounter untrusted media content through email attachments, web downloads, or file sharing platforms. The remote execution capability means that attackers can compromise systems simply by enticing users to open malicious files, making this vulnerability particularly dangerous in enterprise environments where users may inadvertently encounter compromised media content. The denial of service component of this vulnerability can also be leveraged to disrupt business operations, as compromised QuickTime instances can crash entire applications or systems, leading to productivity loss and potential data accessibility issues. The vulnerability's relationship to CVE-2015-3664 and CVE-2015-3665 demonstrates a pattern of similar memory corruption issues within the QuickTime media framework, indicating a systemic problem in how the software handles media file parsing and validation operations. Security researchers have noted that this vulnerability can be exploited through social engineering campaigns where attackers distribute malicious media files through phishing emails or compromised websites, making it particularly challenging to defend against through traditional network security measures.
Organizations should prioritize immediate patching of affected QuickTime installations to mitigate this vulnerability, as the exploitation window remains open for unpatched systems. The recommended mitigation strategy involves deploying Apple's official security updates that address the memory corruption issues in the QT Media Foundation component. Security teams should also implement network-based protections including content filtering solutions that can identify and block potentially malicious media files, particularly those with suspicious file extensions or headers. The vulnerability's characteristics align with ATT&CK technique T1203, Exploitation for Client Execution, which emphasizes the importance of protecting endpoint systems from malicious file execution. Additional defensive measures include user education programs to reduce the likelihood of users opening suspicious media files, application whitelisting policies to restrict QuickTime execution to trusted environments, and regular security assessments to identify any remaining vulnerable systems. Organizations should also consider implementing sandboxing solutions for media playback applications to limit the potential impact of successful exploitation attempts, ensuring that even if an attacker successfully exploits this vulnerability, the damage remains contained within isolated execution environments.