CVE-2018-4358 in iCloud
Summary
by MITRE
Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.
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Analysis
by VulDB Data Team • 08/25/2023
The vulnerability identified as CVE-2018-4358 represents a critical class of memory corruption issues that plagued multiple Apple operating systems and applications prior to their respective version updates. This flaw stems from inadequate memory management practices that allowed attackers to potentially exploit memory handling mechanisms through crafted inputs or specific application states. The vulnerability affected a broad ecosystem including iOS 11 and earlier versions, tvOS 11 and earlier, watchOS 4 and earlier, Safari 11 and earlier, iTunes 12.8 and earlier for Windows, and iCloud for Windows 7.6 and earlier versions. The memory corruption issues typically manifest when applications fail to properly validate memory allocations, deallocations, or buffer operations, creating potential entry points for malicious code execution or system instability. These vulnerabilities are particularly concerning as they can be leveraged to bypass security controls and potentially escalate privileges within affected systems.
The technical implementation of this vulnerability aligns with common memory corruption patterns classified under CWE-122, which deals with insufficient synchronization of memory resources, and CWE-125, which addresses out-of-bounds read conditions. The flaw likely involved improper handling of memory allocation requests where applications failed to properly validate input parameters or maintain proper memory boundaries during dynamic allocation operations. Attackers could potentially trigger these conditions through malformed data inputs or by manipulating application states that lead to memory corruption during processing. The exploitation typically requires understanding of the target application's memory layout and may involve techniques such as heap spraying or precise control over memory allocation patterns. The vulnerability's presence across multiple platforms indicates a systemic issue in Apple's memory management libraries or frameworks that were shared across their operating systems and applications.
The operational impact of CVE-2018-4358 extends beyond simple system crashes or application instability, as these memory corruption vulnerabilities can enable more sophisticated attacks such as arbitrary code execution, privilege escalation, or information disclosure. Systems running affected versions become susceptible to various attack vectors including drive-by downloads, malicious website exploitation, or targeted attacks against specific applications. The cross-platform nature of the vulnerability means that attackers could potentially leverage a single exploit across multiple devices, increasing the attack surface and potential impact. Organizations using affected versions of Apple software may experience unauthorized access to sensitive data, system compromise, or disruption of services. The vulnerability particularly affects enterprise environments where legacy Apple devices may still be in use, creating persistent security risks that require immediate remediation.
Mitigation strategies for CVE-2018-4358 primarily focus on immediate version updates to the affected software components, as Apple released patches for iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, and iCloud for Windows 7.7. System administrators should prioritize deployment of these security updates across all affected devices and applications, particularly in enterprise environments where multiple Apple devices may be in use. Additional protective measures include implementing network monitoring to detect suspicious traffic patterns, disabling unnecessary Apple services or applications, and maintaining strict access controls for systems running affected software. The vulnerability's classification under ATT&CK framework's T1059.007 (Command and Scripting Interpreter: PowerShell) and T1059.008 (Command and Scripting Interpreter: Python) suggests that attackers may attempt to leverage these memory corruption issues as initial access points before establishing more persistent footholds within networks. Organizations should also consider implementing application whitelisting policies to prevent execution of unauthorized code that might exploit similar memory handling vulnerabilities in the future.