iOS 14.5.1, iPadOS 14.5.1 and WatchOS 7.4.1 Released

enaph

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This update fixes an issue with App Tracking Transparency where some users who previously disabled Allow Apps to Request to Track in Settings may not receive prompts from apps after re-enabling it.
This update also provides important security updates and is recommended for all users:

WebKit

Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)

Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Description: A memory corruption issue was addressed with improved state management.

CVE-2021-30665: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA

WebKit

Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)

Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Description: An integer overflow was addressed with improved input validation.

CVE-2021-30663: an anonymous researcher
 
Apple Fixes Zero‑Day Security Bugs Under Active Attack:
Patch Fast!
Per usual, Apple’s lip is zipped. But one thing’s for sure: Patching as soon as possible is top priority. As it is, the chance for websites passing along “maliciously crafted web content” is alarming. If you translate Apple’s statement that “processing maliciously crafted web content may lead to arbitrary code execution, “you get a “drive-by, web-based zero-day RCE exploit, according to Ducklin.

In other words, all you have to do to trigger infection is to visit and view a booby-trapped website.
 
Apple fixes zero-day affecting iPhones and Macs, exploited in the wild
Apple has released security updates to address a zero-day vulnerability exploited in the wild and impacting iPhones, iPads, and Macs.