CVE-2008-2325 in Mac OS X
Summary
by MITRE
QuickLook in Apple Mac OS X 10.4.11 and 10.5.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted Microsoft Office file, related to insufficient "bounds checking."
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Analysis
by VulDB Data Team • 06/05/2025
The vulnerability identified as CVE-2008-2325 represents a critical memory corruption flaw within QuickLook, Apple's desktop preview service that enables users to instantly view file contents without opening them in their respective applications. This issue affects Mac OS X versions 10.4.11 and 10.5.4, where QuickLook's implementation fails to properly validate file boundaries when processing Microsoft Office documents. The flaw stems from inadequate bounds checking mechanisms that allow maliciously crafted Office files to trigger buffer overflows or memory corruption conditions within the QuickLook service. When a user encounters such a crafted file, either through browsing or previewing, the vulnerable QuickLook component attempts to parse the malformed data without sufficient boundary validation, leading to unpredictable memory state corruption.
The technical exploitation of this vulnerability occurs through the manipulation of Microsoft Office file structures that QuickLook processes during preview operations. Attackers can craft Office documents containing maliciously constructed data that exceeds expected buffer sizes or contains malformed headers and metadata. The insufficient bounds checking implementation fails to verify that data extraction operations remain within allocated memory boundaries, creating opportunities for attackers to overwrite adjacent memory locations or corrupt critical program structures. This memory corruption can manifest as application crashes, system instability, or more severely, provide attackers with opportunities to execute arbitrary code within the context of the QuickLook process. The vulnerability's classification aligns with CWE-129, which addresses insufficient bounds checking, and represents a classic buffer overflow scenario where input validation fails to prevent data from exceeding allocated storage limits.
The operational impact of CVE-2008-2325 extends beyond simple denial of service conditions to potentially enable remote code execution attacks. When QuickLook processes malicious Office files, the memory corruption can be leveraged by attackers to gain control over the affected system, particularly since QuickLook operates with elevated privileges to access various file types. Users who frequently preview Office documents or encounter such files through shared networks, email attachments, or web browsing may unknowingly trigger the vulnerability. The attack surface is broadened by the fact that QuickLook automatically previews files in many contexts including Finder windows, email clients, and web browsers that integrate with Mac OS X's preview functionality. System administrators face challenges in mitigating this risk since the vulnerability exists within a core operating system service that is actively used by legitimate users for normal file operations.
Mitigation strategies for this vulnerability require immediate patching of affected Mac OS X versions through Apple's security updates, as the flaw cannot be effectively addressed through configuration changes alone. Organizations should implement network-based controls to filter potentially malicious Office files, particularly those that may be disguised as legitimate documents. The use of sandboxing techniques and privilege separation can help limit the potential damage if exploitation occurs, though the vulnerability's nature makes complete protection difficult without proper patching. Security monitoring should focus on detecting abnormal QuickLook behavior, including unexpected application crashes or memory usage patterns. The vulnerability demonstrates the importance of proper input validation in system services, particularly those that process untrusted data, and aligns with ATT&CK technique T1203 which covers Exploitation for Client Execution. Organizations should also consider implementing user education programs to avoid opening suspicious Office files and maintain regular security updates to protect against similar memory corruption vulnerabilities in other system components.