Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.1067
Apple security update
29 March 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: iOS
iPadOS
watchOS
Publisher: Apple
Operating System: Apple iOS
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1879
Original Bulletin:
https://support.apple.com/en-us/HT212256
https://support.apple.com/en-us/HT212257
https://support.apple.com/en-us/HT212258
Comment: Apple is aware of a report that this issue may have been actively exploited.
This bulletin contains three (3) Apple security advisories.
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APPLE-SA-2021-03-26-1 iOS 14.4.2 and iPadOS 14.4.2
iOS 14.4.2 and iPadOS 14.4.2 addresses the following issue.
Information about the security content is also available at
https://support.apple.com/HT212256.
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
universal cross site scripting. Apple is aware of a report that this
issue may have been actively exploited.
Description: This issue was addressed by improved management of
object lifetimes.
CVE-2021-1879: Clement Lecigne of Google Threat Analysis Group and
Billy Leonard of Google Threat Analysis Group
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 "iOS 14.4.2 and iPadOS 14.4.2".
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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APPLE-SA-2021-03-26-2 iOS 12.5.2
iOS 12.5.2 addresses the following issue. Information about
the security content is also available at
https://support.apple.com/HT212257.
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
universal cross site scripting. Apple is aware of a report that this
issue may have been actively exploited.
Description: This issue was addressed by improved management of
object lifetimes.
CVE-2021-1879: Clement Lecigne of Google Threat Analysis Group and
Billy Leonard of Google Threat Analysis Group
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 "iOS 12.5.2".
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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APPLE-SA-2021-03-26-3 watchOS 7.3.3
watchOS 7.3.3 addresses the following issue.
Information about the security content is also available at
https://support.apple.com/HT212258.
WebKit
Available for: Apple Watch Series 3 and later
Impact: Processing maliciously crafted web content may lead to
universal cross site scripting. Apple is aware of a report that this
issue may have been actively exploited.
Description: This issue was addressed by improved management of
object lifetimes.
CVE-2021-1879: Clement Lecigne of Google Threat Analysis Group and
Billy Leonard of Google Threat Analysis Group
Installation note:
Instructions on how to update your Apple Watch software are
available at https://support.apple.com/kb/HT204641
To check the version on your Apple Watch, open the Apple Watch app
on your iPhone and select "My Watch > General > About".
Alternatively, on your watch, select "My Watch > General > About".
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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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
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===========================================================================
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