CVE-2018-4450 in macOS
Summary
by MITRE
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to macOS Mojave 10.14.2.
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Analysis
by VulDB Data Team • 04/18/2020
The vulnerability identified as CVE-2018-4450 represents a memory corruption flaw that existed in Apple's macOS operating system prior to the release of version 10.14.2. This issue falls under the category of memory safety vulnerabilities that can potentially be exploited to execute arbitrary code or cause system instability. The flaw was specifically addressed through enhanced memory handling mechanisms implemented in the macOS kernel and related system components. The vulnerability affected systems running macOS versions earlier than Mojave 10.14.2, making a significant portion of the user base susceptible to potential exploitation.
The technical nature of this memory corruption issue stems from improper memory management practices within the operating system's core components. Memory corruption vulnerabilities typically occur when applications or system processes write data beyond the boundaries of allocated memory regions, leading to unpredictable behavior and potential security breaches. This particular flaw likely involved insufficient bounds checking or improper memory deallocation procedures that could be triggered through specific system calls or user interactions. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, or CWE-122, which covers heap-based buffer overflow scenarios, though the exact implementation details require deeper analysis of the specific kernel components affected.
The operational impact of CVE-2018-4450 extends beyond simple system instability to potentially enable sophisticated attack vectors. An attacker could exploit this vulnerability to execute malicious code with elevated privileges, potentially compromising the entire system. The memory corruption could lead to privilege escalation attacks where malicious actors gain administrative access to affected systems. Additionally, the vulnerability might enable denial of service conditions that could render systems unusable or cause unexpected system crashes. The issue's presence in kernel-level components means that successful exploitation could result in complete system compromise, making it a critical concern for enterprise environments and users handling sensitive data. The vulnerability's timing in the macOS release cycle suggests it was present during a period when users were transitioning to newer security models and may have been overlooked in previous security assessments.
Mitigation strategies for CVE-2018-4450 primarily focus on immediate system updates and patches provided by Apple. Users should promptly install macOS Mojave 10.14.2 or later versions to address this vulnerability. System administrators should implement comprehensive patch management procedures to ensure all affected devices receive the necessary updates. The remediation process should include verification of patch installation through system reports and monitoring for any signs of exploitation attempts. Additional protective measures include network segmentation to limit potential lateral movement if exploitation occurs, enhanced monitoring of system logs for unusual memory allocation patterns, and implementation of intrusion detection systems that can identify potential exploitation attempts. Organizations should also consider implementing application whitelisting policies and privilege separation mechanisms to reduce the attack surface and limit potential damage from successful exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date system configurations and highlights the critical nature of timely security patch deployment in preventing widespread exploitation across affected platforms.