CVE-2019-8844 in iTunes
Summary
by MITRE • 10/28/2020
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in tvOS 13.3, watchOS 6.1.1, iCloud for Windows 10.9, iOS 13.3 and iPadOS 13.3, Safari 13.0.4, iTunes 12.10.3 for Windows, iCloud for Windows 7.16. Processing maliciously crafted web content may lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 11/29/2020
The vulnerability identified as CVE-2019-8844 represents a critical memory corruption issue affecting multiple Apple operating systems and applications. This vulnerability stems from inadequate memory handling mechanisms within Apple's software ecosystem, specifically impacting tvOS 13.3, watchOS 6.1.1, iCloud for Windows 10.9, iOS 13.3 and iPadOS 13.3, Safari 13.0.4, iTunes 12.10.3 for Windows, and iCloud for Windows 7.16. The flaw manifests when these applications process maliciously crafted web content, creating potential pathways for attackers to execute arbitrary code on affected systems. From a cybersecurity perspective, this vulnerability falls under the category of memory safety issues that can be exploited to bypass modern security protections such as address space layout randomization and data execution prevention mechanisms.
The technical implementation of this vulnerability involves improper memory management during web content rendering processes within Apple's web browsers and application frameworks. When malicious content is loaded into Safari or other affected applications, the flawed memory handling causes buffer overflows, use-after-free conditions, or other memory corruption scenarios that can be leveraged by attackers. These memory corruption issues create unstable memory states that allow malicious code to overwrite critical program structures or execute arbitrary instructions. The vulnerability's exploitation requires careful crafting of web content that triggers specific memory handling paths within the affected applications, making it particularly dangerous as it can be delivered through standard web browsing activities without requiring user interaction beyond visiting compromised websites.
The operational impact of CVE-2019-8844 extends across multiple device types and platforms, creating widespread exposure for users of Apple's ecosystem. Organizations and individuals running affected versions of iOS, tvOS, watchOS, Safari, iTunes, and iCloud for Windows face significant risk of remote code execution attacks that could lead to complete system compromise. Attackers could potentially use this vulnerability to install malicious applications, steal sensitive data, monitor user activities, or establish persistent backdoors on affected devices. The cross-platform nature of the vulnerability means that security teams must implement comprehensive patch management strategies across all affected Apple products, including mobile devices, desktop applications, and cloud services. This vulnerability particularly affects enterprise environments where Apple devices are extensively used, as successful exploitation could provide attackers with access to corporate networks and sensitive organizational data.
Security mitigations for CVE-2019-8844 primarily focus on immediate software updates and system hardening measures. Apple has addressed this vulnerability through the release of patches for all affected versions, including iOS 13.3, tvOS 13.3, watchOS 6.1.1, and various iCloud and iTunes versions. Organizations should prioritize immediate deployment of these security updates across all affected systems, implementing a comprehensive patch management process that includes testing procedures to ensure compatibility. Network administrators should also consider implementing additional protective measures such as web content filtering, sandboxing of web browsers, and monitoring for suspicious network activity that could indicate exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistence through code execution, while the CWE classification would likely fall under memory corruption categories such as CWE-125 (Out-of-bounds Read) or CWE-787 (Out-of-bounds Write). Security teams should also implement behavioral monitoring to detect anomalous execution patterns that might indicate exploitation attempts, particularly focusing on memory-related system calls and process injection activities.