Upgrading to iOS 14.4.2 makes it impossible to downgrade to iOS 14.4.1
On March 26, 2021, Apple released the latest version of iOS,
Apple blocks downgrades to iOS 14.4.1 after patching security vulnerability with iOS 14.4.2 --9to5Mac
https://9to5mac.com/2021/04/02/apple-downgrades-ios-14-4-1/
The 'Critical Security Update' included in iOS 14.4.2 is a fix for a vulnerability in the open source HTML rendering engine 'WebKit' developed by Apple. Apple explained that it is possible to perform cross-site scripting from a website by exploiting this vulnerability, and cyber attacks using the WebKit vulnerability have been confirmed.
Apple has released iOS 14.4.2 to prevent iOS users from being targeted by cross-site scripting using WebKit vulnerabilities. Apple released iOS 14.4.1 on March 8, 2021, which also patched another WebKit vulnerability, fixing two WebKit vulnerabilities in just one month. It means that it was.
In addition, Apple has stopped signing iOS 14.4.1 from April to prevent downgrades to iOS 14.4.1 to prevent exploitation of WebKit vulnerabilities.
Apple-related media 9to5Mac says, 'In other words, if you have any problems with iOS 14.4.2, you have to wait for the next update because there is no way to downgrade the OS to solve the problem. Apple has stopped signing older versions to make sure that as many people as possible are using the latest and most secure operating systems. '
The next version of iOS 14.4.2, 'iOS 14.5,' has already been released in public beta and has been tested by developers. The official version of iOS 14.5 may be released in April 2021, 9to5Mac reports.
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