CVE-2019-8666 in iTunes
Summary
by MITRE
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, Safari 12.1.2, iTunes for Windows 12.9.6, iCloud for Windows 7.13, iCloud for Windows 10.6. Processing maliciously crafted web content may lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 11/07/2023
The vulnerability identified as CVE-2019-8666 represents a critical memory corruption issue that affected multiple Apple operating systems and applications. This flaw emerged from inadequate memory handling practices within Apple's software ecosystem, specifically impacting iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, Safari 12.1.2, iTunes for Windows 12.9.6, and various iCloud for Windows versions. The vulnerability falls under the category of memory safety issues that are commonly classified as CWE-125, which represents out-of-bounds read conditions, and CWE-787, which covers out-of-bounds writes. These memory corruption vulnerabilities create opportunities for attackers to manipulate memory structures and potentially execute arbitrary code on affected systems.
The technical exploitation of CVE-2019-8666 occurs when users interact with maliciously crafted web content through Safari or other affected applications. The memory handling deficiencies allow attackers to craft web pages or content that, when processed by the vulnerable software, triggers memory corruption errors. This corruption can manifest as buffer overflows, use-after-free conditions, or other memory management anomalies that enable attackers to overwrite critical memory locations. The vulnerability's exploitation pathway aligns with ATT&CK technique T1059.003, which involves the use of scripting languages, particularly in web-based attack scenarios where malicious code execution occurs through browser vulnerabilities.
The operational impact of this vulnerability extends beyond individual user devices to encompass enterprise environments where Apple products are extensively deployed. Organizations relying on Safari for web browsing, iTunes for device management, or iCloud for synchronization services face significant risk exposure. Attackers could leverage this vulnerability to gain unauthorized access to sensitive information, execute malicious payloads, or establish persistent access to compromised systems. The cross-platform nature of the vulnerability means that security teams must implement comprehensive mitigation strategies across iOS, macOS, and Windows environments. The fix implemented by Apple in the respective software updates addresses the underlying memory handling issues through improved bounds checking and memory management protocols, effectively closing the exploit window for this class of vulnerability.
Mitigation strategies for CVE-2019-8666 require immediate deployment of the patched software versions across all affected systems. Organizations should prioritize updating Safari, iTunes, and iCloud applications on Windows platforms, while ensuring iOS, macOS, and tvOS devices receive their respective updates. Security teams should implement network monitoring to detect potential exploitation attempts and maintain awareness of related attack patterns. The vulnerability's resolution demonstrates the importance of continuous memory safety auditing in software development processes and highlights the critical role of timely security patch management in maintaining organizational security postures.