CVE-2018-4361 in iCloud
Summary
by MITRE
A memory consumption issue was 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 • 07/27/2024
The vulnerability identified as CVE-2018-4361 represents a memory consumption issue that was prevalent in multiple Apple operating systems and applications prior to specific version updates. This flaw manifested as an improper handling of memory resources, creating potential avenues for attackers to exploit system stability and performance. The vulnerability affected critical Apple platforms including iOS versions before 12.0, tvOS versions before 12.0, watchOS versions before 5.0, Safari browser versions before 12.0, iTunes 12.9 for Windows, and iCloud for Windows 7.7. The issue falls under the category of memory management deficiencies that can lead to resource exhaustion and system instability.
The technical implementation of this vulnerability stems from inadequate memory handling mechanisms within Apple's software frameworks. When applications or system processes encountered certain memory allocation scenarios, the improper memory management would cause excessive memory consumption or memory leaks that could accumulate over time. This type of flaw is particularly concerning in mobile and desktop environments where system resources are constrained and efficient memory utilization is critical for maintaining performance and preventing system crashes. The vulnerability could be exploited through various attack vectors including malformed data processing, repeated memory allocations, or specific API calls that triggered the problematic memory handling code paths.
The operational impact of CVE-2018-4361 extends beyond simple performance degradation to potentially enabling more serious security consequences. Systems affected by this vulnerability could experience denial of service conditions where legitimate applications consume excessive memory resources, leading to system instability, application crashes, or complete system hangs. In mobile environments, this could result in device unresponsiveness or forced restarts, while desktop systems might experience application failures or complete system lockups. The vulnerability's presence in widely used applications like Safari and iTunes meant that it could be exploited through web-based attacks or file processing scenarios, making it particularly dangerous in enterprise environments where these applications are commonly used.
Mitigation strategies for CVE-2018-4361 primarily focus on applying the vendor-provided security updates and patches that address the underlying memory handling issues. Apple released updates for all affected platforms including iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, and iCloud for Windows 7.7, which implemented improved memory management algorithms and safeguards against the problematic code paths. Organizations should prioritize patching all affected systems and monitor for any continued issues that might indicate incomplete remediation. Additionally, system administrators should implement memory monitoring tools to detect unusual memory consumption patterns that could indicate exploitation attempts or residual issues. From a defensive standpoint, this vulnerability aligns with CWE-401, which addresses improper handling of memory allocation and deallocation, and could potentially be leveraged in techniques consistent with ATT&CK matrix tactics involving resource exhaustion and system stability compromise. The remediation process should include comprehensive testing of patched systems to ensure that the memory handling improvements function correctly without introducing regressions in system functionality.