CVE-2018-4415 in macOS
Summary
by MITRE
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to macOS Mojave 10.14.1.
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Analysis
by VulDB Data Team • 04/08/2020
The vulnerability identified as CVE-2018-4415 represents a memory corruption flaw that existed in Apple's macOS operating system prior to the release of version 10.14.1. This issue falls under the category of memory safety vulnerabilities that can potentially lead to arbitrary code execution or system instability. The problem was specifically addressed through enhanced memory handling mechanisms within the affected system components. The vulnerability affected systems running macOS versions earlier than the Mojave 10.14.1 release, indicating that the memory corruption could be exploited by attackers who gained access to vulnerable systems. This type of vulnerability is particularly dangerous because memory corruption issues can be leveraged to execute malicious code with elevated privileges, potentially compromising the entire system.
The technical nature of this memory corruption issue demonstrates how improper memory management can create exploitable conditions within operating system kernels and system frameworks. Memory corruption vulnerabilities typically arise when programs write data beyond allocated memory boundaries or access memory that has already been freed, creating opportunities for attackers to manipulate program execution flow. This particular flaw was classified as a memory safety issue that could be exploited to gain unauthorized access to system resources. The vulnerability required specific conditions to be exploited successfully and was mitigated through improved memory handling practices that prevented the corrupted memory states from being utilized by malicious actors. The fix implemented by Apple involved strengthening the memory management subsystem to properly validate memory operations and prevent the conditions that led to the corruption.
The operational impact of CVE-2018-4415 extends beyond simple system instability to potentially enable full system compromise when exploited. Attackers could leverage this vulnerability to execute arbitrary code with system-level privileges, effectively bypassing standard security controls and potentially establishing persistent access to affected systems. This type of vulnerability is particularly concerning in enterprise environments where macOS systems may be exposed to untrusted network traffic or malicious files. The vulnerability could be exploited through various attack vectors including malicious email attachments, compromised websites, or infected software downloads that would trigger the memory corruption when processed by vulnerable system components. Organizations running affected macOS versions were at risk of unauthorized access, data exfiltration, and potential lateral movement within their networks.
Mitigation strategies for CVE-2018-4415 focused primarily on updating to macOS Mojave 10.14.1 or later versions where Apple had implemented the necessary memory handling improvements. System administrators should prioritize patching affected systems and verify that all macOS installations have been updated to versions that contain the memory safety improvements. Additional protective measures included implementing network monitoring to detect suspicious activities that might indicate exploitation attempts, as well as maintaining current threat intelligence to identify potential attack patterns targeting this vulnerability. The remediation process required careful planning to ensure that updates did not disrupt critical business operations while also addressing the security risk. Organizations should also consider implementing additional security controls such as application whitelisting, sandboxing mechanisms, and regular vulnerability assessments to prevent exploitation of similar memory corruption vulnerabilities. This vulnerability highlights the importance of maintaining up-to-date operating system versions and demonstrates how memory safety issues can be addressed through proper memory management practices. The fix aligns with common security best practices outlined in the CWE database for memory safety issues and represents a typical approach for mitigating memory corruption vulnerabilities that could be exploited under specific conditions.