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Apple Security Advisory 2021-10-26-9

Apple Security Advisory 2021-10-26-9
Posted Oct 28, 2021
Authored by Apple | Site apple.com

Apple Security Advisory 2021-10-26-9 - iOS 15 and iPadOS 15 addresses code execution, denial of service, out of bounds read, spoofing, and use-after-free vulnerabilities.

tags | advisory, denial of service, spoof, vulnerability, code execution
systems | apple, ios
advisories | CVE-2013-0340, CVE-2021-30808, CVE-2021-30809, CVE-2021-30810, CVE-2021-30811, CVE-2021-30814, CVE-2021-30815, CVE-2021-30816, CVE-2021-30818, CVE-2021-30819, CVE-2021-30825, CVE-2021-30826, CVE-2021-30831, CVE-2021-30834, CVE-2021-30835, CVE-2021-30836, CVE-2021-30837, CVE-2021-30838, CVE-2021-30840, CVE-2021-30841, CVE-2021-30842, CVE-2021-30843, CVE-2021-30846, CVE-2021-30847, CVE-2021-30848, CVE-2021-30849
MD5 | 10ccd9e2187205ab5c8b97aff3072166

Apple Security Advisory 2021-10-26-9

Change Mirror Download
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APPLE-SA-2021-10-26-9 Additional information for
APPLE-SA-2021-09-20-1 iOS 15 and iPadOS 15

iOS 15 and iPadOS 15 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/HT212814.

Accessory Manager
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: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory consumption issue was addressed with improved
memory handling.
CVE-2021-30837: Siddharth Aeri (@b1n4r1b01)

AppleMobileFileIntegrity
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: A local attacker may be able to read sensitive information
Description: This issue was addressed with improved checks.
CVE-2021-30811: an anonymous researcher working with Compartir

Apple Neural Engine
Available for devices with Apple Neural Engine: iPhone 8 and later,
iPad Pro (3rd generation) and later, iPad Air (3rd generation) and
later, and iPad mini (5th generation)
Impact: A malicious application may be able to execute arbitrary code
with system privileges on devices with an Apple Neural Engine
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2021-30838: proteas wang

bootp
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: A device may be passively tracked by its WiFi MAC address
Description: A user privacy issue was addressed by removing the
broadcast MAC address.
CVE-2021-30866: Fabien Duchêne of UCLouvain (Belgium)
Entry added October 25, 2021

CoreAudio
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 malicious audio file may result in unexpected
application termination or arbitrary code execution
Description: A logic issue was addressed with improved state
management.
CVE-2021-30834: JunDong Xie of Ant Security Light-Year Lab
Entry added October 25, 2021

CoreML
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: A local attacker may be able to cause unexpected application
termination or arbitrary code execution
Description: This issue was addressed with improved checks.
CVE-2021-30825: hjy79425575 working with Trend Micro Zero Day
Initiative

Face ID
Available for devices with Face ID: iPhone X, iPhone XR, iPhone XS
(all models), iPhone 11 (all models), iPhone 12 (all models), iPad
Pro (11-inch), and iPad Pro (3rd generation)
Impact: A 3D model constructed to look like the enrolled user may be
able to authenticate via Face ID
Description: This issue was addressed by improving Face ID anti-
spoofing models.
CVE-2021-30863: Wish Wu (吴潍浠 @wish_wu) of Ant-financial Light-Year
Security Lab

FaceTime
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: An attacker with physical access to a device may be able to
see private contact information
Description: The issue was addressed with improved permissions logic.
CVE-2021-30816: Atharv (@atharv0x0)
Entry added October 25, 2021

FaceTime
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: An application with microphone permission may unexpectedly
access microphone input during a FaceTime call
Description: A logic issue was addressed with improved validation.
CVE-2021-30882: Adam Bellard and Spencer Reitman of Airtime
Entry added October 25, 2021

FontParser
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 font may result in the
disclosure of process memory
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2021-30831: Xingwei Lin of Ant Security Light-Year Lab
Entry added October 25, 2021

FontParser
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 dfont file may lead to
arbitrary code execution
Description: This issue was addressed with improved checks.
CVE-2021-30840: Xingwei Lin of Ant Security Light-Year Lab
Entry added October 25, 2021

FontParser
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 dfont file may lead to
arbitrary code execution
Description: This issue was addressed with improved checks.
CVE-2021-30841: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-30842: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-30843: Xingwei Lin of Ant Security Light-Year Lab

Foundation
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
Description: A type confusion issue was addressed with improved
memory handling.
CVE-2021-30852: Yinyi Wu (@3ndy1) of Ant Security Light-Year Lab
Entry added October 25, 2021

iCloud Photo Library
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: A malicious application may be able to access photo metadata
without needing permission to access photos
Description: The issue was addressed with improved authentication.
CVE-2021-30867: Csaba Fitzl (@theevilbit) of Offensive Security
Entry added October 25, 2021

ImageIO
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 image may lead to arbitrary
code execution
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2021-30814: hjy79425575
Entry added October 25, 2021

ImageIO
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 image may lead to arbitrary
code execution
Description: This issue was addressed with improved checks.
CVE-2021-30835: Ye Zhang of Baidu Security
CVE-2021-30847: Mike Zhang of Pangu Lab

Kernel
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: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: A race condition was addressed with improved locking.
CVE-2021-30857: Zweig of Kunlun Lab

libexpat
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: A remote attacker may be able to cause a denial of service
Description: This issue was addressed by updating expat to version
2.4.1.
CVE-2013-0340: an anonymous researcher

Model I/O
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 USD file may disclose memory
contents
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2021-30819: Apple

NetworkExtension
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: A VPN configuration may be installed by an app without user
permission
Description: An authorization issue was addressed with improved state
management.
CVE-2021-30874: Javier Vieira Boccardo (linkedin.com/javier-vieira-
boccardo)
Entry added October 25, 2021

Preferences
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: An application may be able to access restricted files
Description: A validation issue existed in the handling of symlinks.
This issue was addressed with improved validation of symlinks.
CVE-2021-30855: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020)
of Tencent Security Xuanwu Lab (xlab.tencent.com)

Preferences
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: A sandboxed process may be able to circumvent sandbox
restrictions
Description: A logic issue was addressed with improved state
management.
CVE-2021-30854: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020)
of Tencent Security Xuanwu Lab (xlab.tencent.com)

Quick Look
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: Previewing an html file attached to a note may unexpectedly
contact remote servers
Description: A logic issue existed in the handling of document loads.
This issue was addressed with improved state management.
CVE-2021-30870: Saif Hamed Al Hinai Oman CERT
Entry added October 25, 2021

Sandbox
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: A malicious application may be able to modify protected parts
of the file system
Description: This issue was addressed with improved checks.
CVE-2021-30808: Csaba Fitzl (@theevilbit) of Offensive Security
Entry added October 25, 2021

Siri
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: A local attacker may be able to view contacts from the lock
screen
Description: A lock screen issue allowed access to contacts on a
locked device. This issue was addressed with improved state
management.
CVE-2021-30815: an anonymous researcher

Telephony
Available for: iPhone SE (1st generation), iPad Pro 12.9-inch, iPad
Air 2, iPad (5th generation), and iPad mini 4
Impact: In certain situations, the baseband would fail to enable
integrity and ciphering protection
Description: A logic issue was addressed with improved state
management.
CVE-2021-30826: CheolJun Park, Sangwook Bae and BeomSeok Oh of KAIST
SysSec Lab

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: Visiting a maliciously crafted website may reveal a user's
browsing history
Description: The issue was resolved with additional restrictions on
CSS compositing.
CVE-2021-30884: an anonymous researcher
Entry added October 25, 2021

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
Description: A type confusion issue was addressed with improved state
handling.
CVE-2021-30818: Amar Menezes (@amarekano) of Zon8Research
Entry added October 25, 2021

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 a maliciously crafted audio file may disclose
restricted memory
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2021-30836: Peter Nguyen Vu Hoang of STAR Labs
Entry added October 25, 2021

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
Description: A use after free issue was addressed with improved
memory management.
CVE-2021-30809: an anonymous researcher
Entry added October 25, 2021

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
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2021-30846: Sergei Glazunov of Google Project Zero

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 code
execution
Description: A memory corruption issue was addressed with improved
memory handling.
CVE-2021-30848: Sergei Glazunov of Google Project Zero

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
Description: Multiple memory corruption issues were addressed with
improved memory handling.
CVE-2021-30849: Sergei Glazunov of Google Project Zero

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 code
execution
Description: A memory corruption vulnerability was addressed with
improved locking.
CVE-2021-30851: Samuel Groß of Google Project Zero

Wi-Fi
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: An attacker in physical proximity may be able to force a user
onto a malicious Wi-Fi network during device setup
Description: An authorization issue was addressed with improved state
management.
CVE-2021-30810: an anonymous researcher

Additional recognition

Assets
We would like to acknowledge Cees Elzinga for their assistance.

Bluetooth
We would like to acknowledge an anonymous researcher for their
assistance.

File System
We would like to acknowledge Siddharth Aeri (@b1n4r1b01) for their
assistance.

Sandbox
We would like to acknowledge Csaba Fitzl (@theevilbit) of Offensive
Security for their assistance.

UIKit
We would like to acknowledge an anonymous researcher for their
assistance.

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 "15"

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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