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Vulnerability DatabaseCVE-2021-1876

CVE-2021-1876: 
macOS vulnerability analysis and mitigation

Overview

A use after free vulnerability (CVE-2021-1876) was discovered in macOS systems, specifically affecting the NSRemoteView component. The vulnerability was fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, and Security Update 2021-003 Mojave, released on April 26, 2021. The issue was identified by Matthew Denton of Google Chrome (Apple Support).

Technical details

The vulnerability is a use-after-free issue in the NSRemoteView component that was addressed with improved memory management. The vulnerability has a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Under the CVSS v2.0 scoring system, it received a base score of 6.8 (MEDIUM) (NVD).

Impact

When exploited, processing maliciously crafted web content may lead to arbitrary code execution on the affected system (Apple Support, Apple Support, Apple Support).

Mitigation and workarounds

Apple addressed this vulnerability by implementing improved memory management in the affected systems. Users should update to macOS Big Sur 11.3, Security Update 2021-002 Catalina, or Security Update 2021-003 Mojave depending on their operating system version (Apple Support).

Additional resources

Source: This report was generated using AI

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