CVE-2018-4467: 
macOS vulnerability analysis and mitigation

A memory corruption vulnerability (CVE-2018-4467) was discovered in the Hypervisor component of macOS. The vulnerability affects multiple versions of macOS including Sierra 10.12.6, High Sierra 10.13.6, and Mojave versions up to 10.14.2. This security issue was addressed in macOS Mojave 10.14.3, Security Update 2019-001 High Sierra, and Security Update 2019-001 Sierra (Apple Security).

The vulnerability is characterized as a memory corruption issue in the Hypervisor component that was addressed with improved state management. The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local access requirements with low attack complexity (NVD).

When exploited, this vulnerability could allow a malicious application to elevate privileges on the affected system. The high CVSS score indicates potential severe impacts on system confidentiality, integrity, and availability (Apple Security, NVD).

The vulnerability requires local access and user interaction to exploit. While the technical details suggest relatively straightforward exploitation given the required access, there are no public reports of this vulnerability being exploited in the wild (NVD).

Apple has addressed this vulnerability in macOS Mojave 10.14.3, Security Update 2019-001 High Sierra, and Security Update 2019-001 Sierra. Users are advised to update to these versions or later to mitigate the vulnerability (Apple Security).