About the security content of iOS 13.3.1 and iPadOS 13.3.1

This document describes the security content of iOS 13.3.1 and iPadOS 13.3.1.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

Apple security documents reference vulnerabilities by CVE-ID when possible.

For more information about security, see the Apple Product Security page.

iOS 13.3.1 and iPadOS 13.3.1

Released 28 January 2020

Audio

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

Impact: An application may be able to execute arbitrary code with system privileges

Description: A memory corruption issue was addressed with improved memory handling.

CVE-2020-3857: Zhuo Liang of Qihoo 360 Vulcan Team

FaceTime

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

Impact: A remote FaceTime user may be able to cause the local user's camera self-view to display the incorrect camera

Description: An issue existed in the handling of the local user's self-view. The issue was corrected with improved logic.

CVE-2020-3869: Elisa Lee

files

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

Impact: A malicious application may be able to overwrite arbitrary files

Description: An access issue was addressed with improved access restrictions.

CVE-2020-3855: Csaba Fitzl (@theevilbit)

Entry added Wednesday, 19 January 2022

ImageIO

Available for: iPhone 6s and later, iPad Air 2 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: An out-of-bounds read was addressed with improved input validation.

CVE-2020-3826: Samuel Groß of Google Project Zero

CVE-2020-3870

CVE-2020-3878: Samuel Groß of Google Project Zero

CVE-2020-3880: Samuel Groß of Google Project Zero

Entry updated 4 April 2020

IOAcceleratorFamily

Available for: iPhone 6s and later, iPad Air 2 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 corruption issue was addressed with improved memory handling.

CVE-2020-3837: Brandon Azad of Google Project Zero

IOUSBDeviceFamily

Available for: iPhone 6s and later, iPad Air 2 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 corruption issue was addressed with improved memory handling.

CVE-2019-8836: Xiaolong Bai and Min (Spark) Zheng of Alibaba Inc. and Luyi Xing of Indiana University Bloomington

Entry added 22 June 2020

IPSec

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

Impact: Loading a maliciously crafted racoon configuration file may lead to arbitrary code execution

Description: An-off-by one issue existed in the handling of racoon configuration files. This issue was addressed through improved bounds checking.

CVE-2020-3840: @littlelailo

Kernel

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

Impact: An application may be able to read restricted memory

Description: A validation issue was addressed with improved input sanitisation.

CVE-2020-3875: Brandon Azad of Google Project Zero

Kernel

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

Impact: An application may be able to read restricted memory

Description: A memory initialisation issue was addressed with improved memory handling.

CVE-2020-3872: Haakon Garseg Mørk of Cognite and Cim Stordal of Cognite

Kernel

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

Impact: A malicious application may be able to determine kernel memory layout

Description: An access issue was addressed with improved memory management.

CVE-2020-3836: Brandon Azad of Google Project Zero

Kernel

Available for: iPhone 6s and later, iPad Air 2 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 corruption issue was addressed with improved memory handling.

CVE-2020-3842: Ned Williamson working with Google Project Zero

CVE-2020-3858: Xiaolong Bai and Min (Spark) Zheng of Alibaba Inc, Luyi Xing of Indiana University Bloomington

Kernel

Available for: iPhone 6s and later, iPad Air 2 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 race condition was addressed with improved locking.

CVE-2020-3831: Chilik Tamir of Zimperium zLabs, Corellium, Proteas of Qihoo 360 Nirvan Team

Entry updated 19 March 2020

Kernel

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

Impact: A malicious application may be able to execute arbitrary code with system privileges

Description: A type confusion issue was addressed with improved memory handling.

CVE-2020-3853: Brandon Azad of Google Project Zero

Kernel

Available for: iPhone 6s and later, iPad Air 2 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 corruption issue was addressed with improved input validation.

CVE-2020-3860: Proteas of Qihoo 360 Nirvan Team

libxml2

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

Impact: Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution

Description: A buffer overflow was addressed with improved size validation.

CVE-2020-3846: Ranier Vilela

Entry added 29 January 2020

libxpc

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

Impact: Processing a maliciously crafted string may lead to heap corruption

Description: A memory corruption issue was addressed with improved input validation.

CVE-2020-3856: Ian Beer of Google Project Zero

libxpc

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

Impact: An application may be able to gain elevated privileges

Description: An out-of-bounds read was addressed with improved bounds checking.

CVE-2020-3829: Ian Beer of Google Project Zero

Mail

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

Impact: Turning off "Load remote content in messages” may not apply to all mail previews

Description: This issue was addressed with improved setting propagation.

CVE-2020-3873: Alexander Heinrich (@Sn0wfreeze) of Technische Universität Darmstadt, Hudson Pridham of Bridgeable, Stuart Chapman

Entry updated 19 March 2020

Messages

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

Impact: A person with physical access to an iOS device may be able to access contacts from the lock screen

Description: An inconsistent user interface issue was addressed with improved state management.

CVE-2020-3859: Andrew Gonzalez, Simone PC

Entry updated 29 January 2020

Messages

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

Impact: Users removed from an iMessage conversation may still be able to alter state

Description: This issue was addressed with improved checks.

CVE-2020-3844: Ayden Panhuyzen (@aydenpanhuyzen) and Jamie Bishop (@jamiebishop123) of Dynastic, Lance Rodgers of Oxon Hill High School

Entry updated 29 January 2020

Phone

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

Impact: A person with physical access to an iOS device may be able to access 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-2020-3828: an anonymous researcher

Safari Login AutoFill

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

Impact: A local user may unknowingly send a password unencrypted over the network

Description: The issue was addressed with improved UI handling.

CVE-2020-3841: Sebastian Bicchi (@secresDoge) from Sec-Research

Screenshots

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

Impact: Screenshots of the Messages app may reveal additional message content

Description: An issue existed in the naming of screenshots. The issue was corrected with improved naming.

CVE-2020-3874: Nicolas Luckie of Durham College

WebKit

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

Impact: A malicious website may be able to cause a denial of service

Description: A denial of service issue was addressed with improved memory handling.

CVE-2020-3862: Srikanth Gatta of Google Chrome

Entry added 29 January 2020

WebKit

Available for: iPhone 6s and later, iPad Air 2 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-2020-3825: Przemysław Sporysz of Euvic

CVE-2020-3868: Marcin Towalski of Cisco Talos

Entry added 29 January 2020

WebKit

Available for: iPhone 6s and later, iPad Air 2 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

Description: A logic issue was addressed with improved state management.

CVE-2020-3867: an anonymous researcher

Entry added 29 January 2020

WebKit Page Loading

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

Impact: A DOM object context may not have had a unique security origin

Description: A logic issue was addressed with improved validation.

CVE-2020-3864: Ryan Pickren (ryanpickren.com)

Entry added 6 February 2020

WebKit Page Loading

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

Impact: A top-level DOM object context may have incorrectly been considered secure

Description: A logic issue was addressed with improved validation.

CVE-2020-3865: Ryan Pickren (ryanpickren.com)

Entry added 29 January 2020, updated 6 February 2020

Wi-Fi

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

Impact: A remote attacker may be able to cause unexpected system termination or corrupt kernel memory

Description: a memory corruption issue was addressed with improved input validation.

CVE-2020-3843: Ian Beer of Google Project Zero

Entry added 6 February 2020

wifivelocityd

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

Impact: An application may be able to execute arbitrary code with system privileges

Description: The issue was addressed with improved permissions logic.

CVE-2020-3838: Dayton Pidhirney (@_watbulb)

Additional recognition

IOSurface

We would like to acknowledge Liang Chen (@chenliang0817) for their assistance.

Photos Storage

We would like to acknowledge Allison Husain of UC Berkeley for their assistance.

Entry updated 19 March 2020

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