About the security content of iCloud for Windows 12.3

This document describes the security content of iCloud for Windows 12.3.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

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

For more information about security, see the Apple Product Security page.

iCloud for Windows 12.3

Released April 26, 2021

CFNetwork

Available for: Windows 10 and later via the Microsoft Store

Impact: Processing maliciously crafted web content may disclose sensitive user information

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

CVE-2021-1857: an anonymous researcher

CoreText

Available for: Windows 10 and later via the Microsoft Store

Impact: Processing a maliciously crafted font may result in the disclosure of process memory

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

CVE-2021-1811: Xingwei Lin of Ant Security Light-Year Lab

WebKit

Available for: Windows 10 and later via the Microsoft Store

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-2021-1825: Alex Camboe of Aon’s Cyber Solutions

WebRTC

Available for: Windows 10 and later via the Microsoft Store

Impact: A remote attacker may be able to cause unexpected system termination or corrupt kernel memory

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

CVE-2020-7463: Megan2013678

Additional recognition

CoreCrypto

We would like to acknowledge Andy Russon of Orange Group for their assistance.

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