HomeKit: Denial of Service -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.0162
                       iOS 15.2.1 and iPadOS 15.2.1
                              13 January 2022

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        AusCERT Security Bulletin Summary
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Product:           HomeKit
Publisher:         Apple
Operating System:  iOS
                   iPadOS
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-22588  

Original Bulletin: 
   https://support.apple.com/en-us/HT213043

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APPLE-SA-2022-01-12-1 iOS 15.2.1 and iPadOS 15.2.1

iOS 15.2.1 and iPadOS 15.2.1 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT213043.

HomeKit
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 a maliciously crafted HomeKit accessory name
may cause a denial of service
Description: A resource exhaustion issue was addressed with
improved input validation.
CVE-2022-22588: Trevor Spiniolas (@TrevorSpiniolas)

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 â\x{128}\x{156}15.2.1"

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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