CVE-2009-2203 in QuickTime
Summary
by MITRE
Buffer overflow in Apple QuickTime before 7.6.4 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted MPEG-4 video file.
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Analysis
by VulDB Data Team • 08/22/2021
The vulnerability identified as CVE-2009-2203 represents a critical buffer overflow flaw within Apple QuickTime software versions prior to 7.6.4. This security weakness exists in the handling of MPEG-4 video files and creates a significant attack surface for remote threat actors seeking to compromise systems running affected QuickTime versions. The vulnerability stems from inadequate input validation mechanisms within the video decoding pipeline, specifically when processing malformed MPEG-4 containers that contain oversized data structures exceeding allocated buffer boundaries.
The technical implementation of this flaw occurs during the parsing of MPEG-4 video streams where QuickTime fails to properly validate the size parameters of video frames and associated metadata structures. When a maliciously crafted MPEG-4 file is processed, the application attempts to allocate memory buffers based on incorrect size indicators embedded within the video stream. This misalignment causes the program to write data beyond the intended memory boundaries, leading to memory corruption that can be exploited to overwrite critical program execution structures. The vulnerability manifests as a classic stack-based buffer overflow when the application processes video data that exceeds predefined buffer limits, particularly affecting the handling of video frame headers and motion compensation data structures.
From an operational impact perspective, this vulnerability creates a severe threat landscape for enterprise and individual users who rely on QuickTime for multimedia content consumption. Remote attackers can leverage this flaw to execute arbitrary code with the privileges of the affected application, potentially leading to complete system compromise. The attack vector requires no user interaction beyond opening the malicious file, making it particularly dangerous in phishing campaigns or when users encounter compromised media content on untrusted websites. Additionally, the vulnerability can be exploited to cause application crashes, resulting in denial of service conditions that disrupt legitimate multimedia operations and potentially provide attackers with additional attack surface through crash exploitation techniques.
The mitigation strategies for CVE-2009-2203 primarily focus on immediate software updates to Apple QuickTime 7.6.4 or later versions where the buffer overflow protections have been implemented. System administrators should prioritize patching all affected systems and disable QuickTime functionality in environments where multimedia content is not essential for operations. Network security controls including content filtering and sandboxing of multimedia applications can provide additional defense layers. Organizations should also implement monitoring for suspicious file access patterns and consider disabling QuickTime plugins in web browsers to prevent automatic execution of potentially malicious media content. This vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and maps to attack techniques in the MITRE ATT&CK framework under T1059 for command and control through application execution. The remediation process should include comprehensive system inventory to identify all affected QuickTime installations and validate successful patch application across all endpoints.