macOS 11.3.1 is an update to macOS 11 (Big Sur) that was released on May 3, 2021 by Apple Inc.[1]
Summary[]
macOS Big Sur 11.3.1 adds security fixes for WebKit, the browser core that underlies Safari, the Apple online store, and other web-connected apps in macOS.
WebKit security fixes[]
CVE-2021-30663[]
Discovered by an anonymous researcher, processing of maliciously crafted web content may lead to arbitrary code execution. Apple became aware of a report that this issue may have been actively exploited.
Description of fix: An integer overflow was addressed with improved input validation.
CVE-2021-30665[]
Discovered by yangkang (@dnpushme), zerokeeper, and bianliang of 360 ATA, processing of maliciously crafted web content may lead to arbitrary code execution. Apple became aware of a report that this issue may have been actively exploited.
Description of fix: A memory corruption issue was addressed with improved state management.
References[]
- ↑ About the security content of macOS Big Sur 11.3.1, Apple Support. 2021-05-03.