About the security content of Safari 13.1

This document describes the security content of Safari 13.1.

About Apple security updates

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Apple security documents reference vulnerabilities by CVE-ID when possible.

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Safari 13.1

Released 24 March 2020

Safari Downloads

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: A malicious iframe may use another website’s download settings

Description: A logic issue was addressed with improved restrictions.

CVE-2020-9784: Ruilin Yang of Tencent Security Xuanwu Lab, Ryan Pickren (ryanpickren.com)

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

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

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

CVE-2020-3901: Benjamin Randazzo (@____benjamin)

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: A download's origin may be incorrectly associated

Description: A logic issue was addressed with improved restrictions.

CVE-2020-3887: Ryan Pickren (ryanpickren.com)

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

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

Description: A memory corruption issue was addressed with improved memory handling.

CVE-2020-3895: grigoritchy

CVE-2020-3900: Dongzhuo Zhao working with ADLab of Venustech

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: An application may be able to read restricted memory

Description: A race condition was addressed with additional validation.

CVE-2020-3894: Sergei Glazunov of Google Project Zero

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: A remote attacker may be able to cause arbitrary code execution

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

CVE-2020-3897: Brendan Draper (@6r3nd4n) working with Trend Micro’s Zero Day Initiative

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

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

Description: A use after free issue was addressed with improved memory management.

CVE-2020-9783: Apple

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: A remote attacker may be able to cause arbitrary code execution

Description: A memory consumption issue was addressed with improved memory handling.

CVE-2020-3899: found by OSS-Fuzz

WebKit

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: Processing maliciously crafted web content may lead to a cross-site scripting attack

Description: An input validation issue was addressed with improved input validation.

CVE-2020-3902: Yiğit Can YILMAZ (@yilmazcanyigit)

WebKit Page Loading

Available for: macOS Mojave and macOS High Sierra, and included in macOS Catalina

Impact: A file URL may be incorrectly processed

Description: A logic issue was addressed with improved restrictions.

CVE-2020-3885: Ryan Pickren (ryanpickren.com)

Additional recognition

Safari

We would like to acknowledge Dlive of Tencent Security Xuanwu Lab, Jacek Kolodziej of Procter & Gamble, and Justin Taft of One Up Security, LLC for their assistance.

Safari Extensions

We would like to acknowledge Jeff Johnson of underpassapp.com for their assistance.

Safari Reader

We would like to acknowledge Nikhil Mittal (@c0d3G33k) of Payatu Labs (payatu.com) for their assistance.

WebKit

We would like to acknowledge Emilio Cobos Álvarez of Mozilla, Samuel Groß of Google Project Zero, and an anonymous researcher for their assistance.

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