CVE-2018-4315 in iCloud
Summary
by MITRE
A use after free issue was addressed with improved memory management. This issue affected versions prior to iOS 12, tvOS 12, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.
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Analysis
by VulDB Data Team • 01/19/2025
The vulnerability identified as CVE-2018-4315 represents a classic use-after-free condition that emerged in Apple's software ecosystem affecting multiple platforms including iOS, tvOS, Safari, and various iTunes and iCloud components. This memory management flaw stems from improper handling of memory allocation and deallocation processes within Apple's proprietary software implementations. The issue manifests when a program continues to reference memory locations after they have been freed, creating potential attack vectors for malicious actors to execute arbitrary code or cause system instability. The vulnerability was particularly concerning given its widespread impact across Apple's ecosystem and the critical nature of the affected applications.
The technical root cause of this use-after-free vulnerability can be traced to inadequate memory management practices within Apple's software libraries and frameworks. When objects are destroyed or freed from memory, proper nullification of pointers should occur to prevent subsequent access attempts. However, in affected versions of Apple's software, this critical safety mechanism was insufficiently implemented, allowing attackers to manipulate memory references and potentially execute malicious code. This flaw aligns with CWE-416, which specifically addresses the use of freed memory condition, and represents a fundamental breakdown in software memory safety practices that violates established secure coding principles.
The operational impact of CVE-2018-4315 extends across multiple attack surfaces within Apple's ecosystem, particularly affecting users of iOS 11 and earlier versions, tvOS 11 and earlier, Safari 11 and earlier, and older versions of iTunes and iCloud for Windows. Attackers could exploit this vulnerability through various means including malicious web content, specially crafted files, or social engineering campaigns targeting vulnerable systems. The potential consequences include unauthorized code execution, system compromise, data theft, and disruption of normal operations. This vulnerability particularly threatened enterprise environments where Apple devices were extensively deployed, as successful exploitation could lead to widespread security breaches and compliance violations.
Mitigation strategies for CVE-2018-4315 primarily involve immediate software updates and patches provided by Apple to address the underlying memory management issues. System administrators should prioritize deployment of iOS 12, tvOS 12, Safari 12, iTunes 12.9, and iCloud for Windows 7.7 updates across all affected devices. Additional protective measures include implementing network monitoring solutions to detect anomalous behavior patterns, deploying application whitelisting policies to restrict execution of unauthorized code, and maintaining comprehensive backup strategies to ensure rapid recovery in case of successful exploitation. Organizations should also consider implementing sandboxing mechanisms and privilege separation techniques to limit the potential damage from any successful attacks. The vulnerability highlights the importance of continuous security monitoring and proactive patch management in maintaining robust cybersecurity postures.