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Vulnerability DatabaseCVE-2021-30879

CVE-2021-30879: 
macOS vulnerability analysis and mitigation

Overview

CVE-2021-30879 is an out-of-bounds read vulnerability discovered in Apple's AppleScript component. The vulnerability was fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, and macOS Big Sur 11.6.1, released on October 25, 2021. The vulnerability was discovered by security researcher Jeremy Brown along with researcher hjy79425575 (Apple Security Updates).

Technical details

The vulnerability is classified as an out-of-bounds read issue (CWE-125) in the AppleScript component. The vulnerability received a CVSS v3.1 base score of 7.1 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H. The issue was addressed by implementing improved bounds checking in the affected systems (NVD).

Impact

When exploited, this vulnerability could allow processing of a maliciously crafted AppleScript binary to result in unexpected application termination or disclosure of process memory (Apple Security Updates).

Mitigation and workarounds

Apple addressed this vulnerability by implementing improved bounds checking in the security updates released on October 25, 2021. Users should update to macOS Monterey 12.0.1, Security Update 2021-007 Catalina, or macOS Big Sur 11.6.1 to protect against this vulnerability (Apple Security Updates, Apple Catalina Update, Apple Big Sur Update).

Additional resources

Source: This report was generated using AI

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