CVE-2008-1023 in QuickTime
Summary
by MITRE
Heap-based buffer overflow in Clip opcode parsing in Apple QuickTime before 7.4.5 on Windows allows remote attackers to execute arbitrary code via a crafted PICT image file.
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Analysis
by VulDB Data Team • 06/01/2025
The vulnerability identified as CVE-2008-1023 represents a critical heap-based buffer overflow flaw within Apple QuickTime's handling of PICT image files on Windows systems. This vulnerability specifically affects the Clip opcode parsing mechanism within the QuickTime framework, where improper bounds checking allows attackers to manipulate memory allocation during image processing operations. The flaw exists in QuickTime versions prior to 7.4.5 and poses significant security risks when users encounter maliciously crafted PICT files, which are commonly used in various multimedia applications and document formats.
The technical implementation of this vulnerability stems from inadequate input validation within the QuickTime media processing engine. When the software encounters a PICT file containing a specially crafted Clip opcode, the parsing routine fails to properly validate the buffer boundaries before writing data to heap memory locations. This insufficient validation creates a condition where attacker-controlled data can overwrite adjacent memory regions, potentially allowing arbitrary code execution with the privileges of the affected user. The heap-based nature of the overflow indicates that the vulnerability occurs during dynamic memory allocation operations, making exploitation more complex but equally dangerous as the memory corruption can be leveraged to overwrite critical program structures or function pointers.
From an operational perspective, this vulnerability presents a significant threat vector for remote code execution attacks, particularly in environments where users frequently open multimedia content from untrusted sources. The attack requires minimal user interaction beyond viewing or opening the malicious PICT file, making it particularly dangerous in phishing campaigns or exploit delivery scenarios. Security researchers have classified this vulnerability as highly critical due to its remote exploitability and the potential for privilege escalation, as the attack can be executed without requiring local system access. The impact extends beyond simple code execution to potentially allow attackers to establish persistent access, steal sensitive information, or deploy additional malware components within the compromised system.
Organizations and individual users should immediately implement mitigation strategies including prompt patching of affected QuickTime installations to version 7.4.5 or later, which contains the necessary memory validation fixes. Network administrators should consider implementing content filtering measures to block PICT file attachments from untrusted sources and deploy updated security software that can detect and prevent exploitation attempts. System hardening measures such as disabling QuickTime plugin support in web browsers and restricting user permissions during media file processing can further reduce the attack surface. This vulnerability aligns with CWE-121, heap-based buffer overflow, and maps to ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would enable attackers to execute arbitrary commands on the compromised system. The remediation process should include comprehensive vulnerability scanning to identify all affected systems and implementation of proper input validation controls to prevent similar issues in other applications handling similar multimedia formats.