CVE-2019-8734 in iTunes
Summary
by MITRE • 10/28/2020
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 13, iCloud for Windows 7.14, iCloud for Windows 10.7, Safari 13, tvOS 13, watchOS 6, iTunes 12.10.1 for Windows. Processing maliciously crafted web content may lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 11/28/2020
The vulnerability identified as CVE-2019-8734 represents a critical memory corruption issue that affects multiple Apple operating systems and applications. This flaw resides in the fundamental memory management mechanisms of Apple's software ecosystem, specifically impacting iOS 13, tvOS 13, watchOS 6, Safari 13, and various versions of iCloud for Windows. The vulnerability stems from inadequate memory handling practices that fail to properly validate or sanitize input data during processing. According to industry standards, this issue maps to CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write vulnerabilities. The flaw demonstrates characteristics consistent with memory safety issues that have been extensively documented in the cybersecurity community.
The technical exploitation of this vulnerability occurs when maliciously crafted web content is processed by affected applications. When users encounter such content through Safari or other web browsing interfaces, the malformed data triggers memory corruption that can be leveraged by attackers to execute arbitrary code on the target system. This type of attack vector aligns with the ATT&CK framework's technique T1059.001, which involves command and scripting interpreter execution, and T1068, which covers exploit for privilege escalation. The memory corruption manifests through improper bounds checking and memory allocation handling, allowing attackers to manipulate memory locations that should remain protected or inaccessible.
The operational impact of CVE-2019-8734 extends beyond individual device compromise to potentially enable broader attack campaigns targeting Apple ecosystem users. Attackers can exploit this vulnerability to gain unauthorized access to user data, install persistent malware, or escalate privileges within the affected systems. The vulnerability's presence across multiple platforms including mobile devices, desktop applications, and operating systems creates an expansive attack surface that security professionals must consider when implementing defensive measures. Organizations relying on Apple products for business operations face significant risk exposure, particularly in environments where users regularly access untrusted web content or where security updates may be delayed.
Mitigation strategies for CVE-2019-8734 focus primarily on applying the vendor-provided security patches and updates. Apple has addressed this vulnerability through multiple software updates including iOS 13, tvOS 13, watchOS 6, Safari 13, and updated versions of iCloud for Windows. System administrators should prioritize immediate deployment of these patches across all affected devices within their networks. Additional protective measures include implementing web content filtering solutions, disabling automatic content rendering for suspicious websites, and maintaining strict update policies for all Apple products. Security monitoring should focus on detecting unusual network traffic patterns or unauthorized access attempts that might indicate exploitation attempts. The vulnerability's resolution through improved memory handling techniques demonstrates the importance of regular security updates and the critical need for organizations to maintain comprehensive patch management programs to protect against similar memory corruption issues.