About the security content of Safari 15.1

This document describes the security content of Safari 15.1.

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Safari 15.1

Released October 27, 2021

WebKit

Available for: macOS Big Sur and macOS Catalina

Impact: Processing maliciously crafted web content may lead to code execution

Description: A type confusion issue was addressed with improved memory handling.

CVE-2021-31008

Entry added March 31, 2022

WebKit

Available for: macOS Big Sur and macOS Catalina

Impact: Processing maliciously crafted web content may lead to unexpectedly unenforced Content Security Policy

Description: A logic issue was addressed with improved restrictions.

CVE-2021-30887: Narendra Bhati (@imnarendrabhati) of Suma Soft Pvt. Ltd.

WebKit

Available for: macOS Big Sur and macOS Catalina

Impact: A malicious website using Content Security Policy reports may be able to leak information via redirect behavior

Description: An information leakage issue was addressed.

CVE-2021-30888: Prakash (@1lastBr3ath)

WebKit

Available for: macOS Big Sur and macOS Catalina

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

Description: A buffer overflow issue was addressed with improved memory handling.

CVE-2021-30889: Chijin Zhou of ShuiMuYuLin Ltd and Tsinghua wingtecher lab

WebKit

Available for: macOS Big Sur and macOS Catalina

Impact: Processing maliciously crafted web content may lead to universal cross site scripting

Description: A logic issue was addressed with improved state management.

CVE-2021-30890: an anonymous researcher

Additional recognition

WebKit

We would like to acknowledge Ivan Fratric of Google Project Zero, Pavel Gromadchuk, and an anonymous researcher for their assistance.

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