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Date: Mon, 03 May 2021 14:57:18 -0700
From: Apple Product Security via Fulldisclosure <fulldisclosure@...lists.org>
To: security-announce@...ts.apple.com
Subject: [FD] APPLE-SA-2021-05-03-2 iOS 12.5.3

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

APPLE-SA-2021-05-03-2 iOS 12.5.3

iOS 12.5.3 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT212341.

WebKit
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad
mini 2, iPad mini 3, and iPod touch (6th 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 buffer overflow issue was addressed with improved
memory handling.
CVE-2021-30666: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA

WebKit
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad
mini 2, iPad mini 3, and iPod touch (6th 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 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad
mini 2, iPad mini 3, and iPod touch (6th 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

WebKit Storage
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad
mini 2, iPad mini 3, and iPod touch (6th 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 use after free issue was addressed with improved
memory management.
CVE-2021-30661: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA

Installation note:

This update is available through iTunes and Software Update on your
iOS device, and will not appear in your computer's Software Update
application, or in the Apple Downloads site. Make sure you have an
Internet connection and have installed the latest version of iTunes
from https://www.apple.com/itunes/

iTunes and Software Update on the device will automatically check
Apple's update server on its weekly schedule. When an update is
detected, it is downloaded and the option to be installed is
presented to the user when the iOS device is docked. We recommend
applying the update immediately if possible. Selecting Don't Install
will present the option the next time you connect your iOS device.
The automatic update process may take up to a week depending on the
day that iTunes or the device checks for updates. You may manually
obtain the update via the Check for Updates button within iTunes, or
the Software Update on your device.

To check that the iPhone, iPod touch, or iPad has been updated:
* Navigate to Settings
* Select General
* Select About
* The version after applying this update will be "12.5.3"

Information will also be posted to the Apple Security Updates
web site: https://support.apple.com/kb/HT201222

This message is signed with Apple's Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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