Apple releases and pulls back Rapid Security Response for iOS 16.5.1 and macOS 13.4.1

Apple released Rapid Security Response for iOS – 16.5.1 (a) and macOS Ventura – 13.4.1 (a).

This update fixes vulnerability actively used to compromise Apple platforms. However, it became known that this update also causes issues for some users with web applications including Instagram and Facebook.

Apple then stopped distributing the update and currently promising new update to be available soon.

Users who already installed it and experience issues should wait for updated version in coming days.

Turns out that issue was due to User Agent text containing “(a)” and, therefore, breaking some of the checks on web sites.

References:

• Apple releases important security fix for iPhone and iPad
• Apple Releases Rapid Security Response Updates for iOS 16.5.1 and macOS 13.4.1 to Fix Actively Exploited Vulnerability [Updated]
• Apple Pulls iOS 16.5.1 and macOS 13.4.1 Rapid Security Response Updates Due to Safari Bug
• iOS 16.5.1 security fix temporarily pulled after it broke websites
• Apple says fix for fix is coming after security update accidentally breaks web for some
• Apple Planning New Rapid Security Responses for iPhone, iPad, and Mac to Address Website Loading Issue
• Rapid Security Responses Pulled Due to User Agent