About the security content of iOS 14.4 and iPadOS 14.4

This document describes the security content of iOS 14.4 and iPadOS 14.4.

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 14.4 and iPadOS 14.4

Released January 26, 2021

Analytics

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 a denial of service

Description: This issue was addressed with improved checks.

CVE-2021-1761: Cees Elzinga

Entry added February 1, 2021

APFS

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 be able to read arbitrary files

Description: The issue was addressed with improved permissions logic.

CVE-2021-1797: Thomas Tempelmann

Entry added February 1, 2021

Bluetooth

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 arbitrary code execution

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

CVE-2021-1794: Jianjun Dai of 360 Alpha Lab

Entry added February 1, 2021

Bluetooth

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 arbitrary code execution

Description: An out-of-bounds write was addressed with improved input validation.

CVE-2021-1795: Jianjun Dai of 360 Alpha Lab

CVE-2021-1796: Jianjun Dai of 360 Alpha Lab

Entry added February 1, 2021

Bluetooth

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

Impact: An attacker in a privileged position may be able to perform a denial of service attack

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

CVE-2021-1780: Jianjun Dai of 360 Alpha Lab

Entry added February 1, 2021

CoreAnimation

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 could execute arbitrary code leading to compromise of user information

Description: A memory corruption issue was addressed with improved state management.

CVE-2021-1760: @S0rryMybad of 360 Vulcan Team

Entry added February 1, 2021

CoreAudio

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 code execution

Description: An out-of-bounds write was addressed with improved input validation.

CVE-2021-1747: JunDong Xie of Ant Security Light-Year Lab

Entry added February 1, 2021

CoreGraphics

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 font file may lead to arbitrary code execution

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

CVE-2021-1776: Ivan Fratric of Google Project Zero

Entry added February 1, 2021

CoreMedia

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-2021-1759: Hou JingYi (@hjy79425575) of Qihoo 360 CERT

Entry added February 1, 2021

CoreText

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 text file may lead to arbitrary code execution

Description: A stack overflow was addressed with improved input validation.

CVE-2021-1772: Mickey Jin of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

CoreText

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 arbitrary code execution

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

CVE-2021-1792: Mickey Jin & Junzhi Lu of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Crash Reporter

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 be able to create or modify system files

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

CVE-2021-1786: Csaba Fitzl (@theevilbit) of Offensive Security

Entry added February 1, 2021

Crash Reporter

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

Impact: A local attacker may be able to elevate their privileges

Description: Multiple issues were addressed with improved logic.

CVE-2021-1787: James Hutchins

Entry added February 1, 2021

FairPlay

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 disclose kernel memory

Description: An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation.

CVE-2021-1791: Junzhi Lu(@pwn0rz), Qi Sun and Mickey Jin of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

FontParser

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 arbitrary code execution

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

CVE-2021-1758: Peter Nguyen of STAR Labs

Entry added February 1, 2021

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 a denial of service

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

CVE-2021-1773: Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021

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 a denial of service

Description: This issue was addressed with improved checks.

CVE-2021-1766: Danny Rosseau of Carve Systems

Entry added February 1, 2021

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-2021-1785: Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021

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 write was addressed with improved input validation.

CVE-2021-1744: Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021

ImageIO

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 application termination or arbitrary code execution

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

CVE-2021-1818: Xingwei Lin of Ant-Financial Light-Year Security Lab

Entry added February 1, 2021

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: This issue was addressed with improved checks.

CVE-2021-1742: Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-1746: Jeonghoon Shin(@singi21a) of THEORI, Mickey Jin & Qi Sun of Trend Micro working with Trend Micro’s Zero Day Initiative, Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-1754: Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-1774: Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-1777: Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-1793: Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021, updated March 16, 2021

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 bounds checking.

CVE-2021-1741: Xingwei Lin of Ant Security Light-Year Lab

CVE-2021-1743: Mickey Jin & Junzhi Lu of Trend Micro working with Trend Micro’s Zero Day Initiative, Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021, updated March 16, 2021

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 a denial of service

Description: An out-of-bounds read issue existed in the curl. This issue was addressed with improved bounds checking.

CVE-2021-1778: Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021

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 access issue was addressed with improved memory management.

CVE-2021-1783: Xingwei Lin of Ant Security Light-Year Lab

Entry added February 1, 2021

IOSkywalkFamily

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

Impact: A local attacker may be able to elevate their privileges

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

CVE-2021-1757: Proteas and Pan ZhenPeng (@Peterpan0927) of Alibaba Security

Entry added February 1, 2021

iTunes Store

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 URL may lead to arbitrary javascript code execution

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

CVE-2021-1748: CodeColorist working with Ant Security Light-Year Labs

Entry added February 1, 2021, updated March 16, 2021

Kernel

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 a denial of service

Description: A use after free issue was addressed with improved memory management.

CVE-2021-1764: @m00nbsd

Entry added February 1, 2021, updated March 16, 2021

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: Multiple issues were addressed with improved logic.

CVE-2021-1750: @0xalsr

Entry added February 1, 2021

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 elevate privileges. Apple is aware of a report that this issue may have been actively exploited.

Description: A race condition was addressed with improved locking.

CVE-2021-1782: an anonymous researcher

Messages

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 leak sensitive user information

Description: A privacy issue existed in the handling of Contact cards. This was addressed with improved state management.

CVE-2021-1781: Csaba Fitzl (@theevilbit) of Offensive Security

Entry added February 1, 2021

Model I/O

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 USD file may lead to unexpected application termination or arbitrary code execution

Description: A buffer overflow was addressed with improved bounds checking.

CVE-2021-1763: Mickey Jin of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Model I/O

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 USD file may lead to unexpected application termination or arbitrary code execution

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

CVE-2021-1768: Mickey Jin & Junzhi Lu of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Model I/O

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 USD file may lead to unexpected application termination or arbitrary code execution

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

CVE-2021-1745: Mickey Jin & Junzhi Lu of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Model I/O

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 USD file may lead to unexpected application termination or arbitrary code execution

Description: An out-of-bounds write was addressed with improved input validation.

CVE-2021-1762: Mickey Jin of Trend Micro

Entry added February 1, 2021

Model I/O

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 USD file may lead to unexpected application termination or arbitrary code execution

Description: An out-of-bounds write was addressed with improved input validation.

CVE-2021-1762: Mickey Jin of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Model I/O

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 heap corruption

Description: This issue was addressed with improved checks.

CVE-2021-1767: Mickey Jin & Junzhi Lu of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Model I/O

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 bounds checking.

CVE-2021-1753: Mickey Jin of Trend Micro

Entry added February 1, 2021

Model I/O

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 bounds checking.

CVE-2021-1753: Mickey Jin of Trend Micro working with Trend Micro’s Zero Day Initiative

Entry added February 1, 2021, updated March 16, 2021

Phone Keypad

Available for: iPhone 6s and later, iPad Air 2 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: A lock screen issue allowed access to contacts on a locked device. This issue was addressed with improved state management.

CVE-2021-1756: Ryan Pickren (ryanpickren.com)

Entry added February 1, 2021

Swift

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

Impact: A malicious attacker with arbitrary read and write capability may be able to bypass Pointer Authentication

Description: A logic issue was addressed with improved validation.

CVE-2021-1769: CodeColorist of Ant-Financial Light-Year Labs

Entry added February 1, 2021

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: A use after free issue was addressed with improved memory management.

CVE-2021-1788: Francisco Alonso (@revskills)

Entry added February 1, 2021, updated March 16, 2021

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: A type confusion issue was addressed with improved state handling.

CVE-2021-1789: @S0rryMybad of 360 Vulcan Team

Entry added February 1, 2021

WebKit

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

Impact: Maliciously crafted web content may violate iframe sandboxing policy

Description: This issue was addressed with improved iframe sandbox enforcement.

CVE-2021-1801: Eliya Stein of Confiant

Entry added February 1, 2021

WebKit

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 arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Description: A logic issue was addressed with improved restrictions.

CVE-2021-1871: an anonymous researcher

CVE-2021-1870: an anonymous researcher

WebRTC

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 access restricted ports on arbitrary servers

Description: A port redirection issue was addressed with additional port validation.

CVE-2021-1799: Gregory Vishnepolsky & Ben Seri of Armis Security, and Samy Kamkar

Entry added February 1, 2021

Additional recognition

iTunes Store

We would like to acknowledge CodeColorist of Ant-Financial Light-Year Labs for their assistance.

Entry added February 1, 2021

Kernel

We would like to acknowledge Junzhi Lu (@pwn0rz), Mickey Jin & Jesse Change of Trend Micro for their assistance.

Entry added February 1, 2021

libpthread

We would like to acknowledge CodeColorist of Ant-Financial Light-Year Labs for their assistance.

Entry added February 1, 2021

Mail

We would like to acknowledge Yiğit Can YILMAZ (@yilmazcanyigit) and an anonymous researcher for their assistance.

Entry added February 1, 2021

Store Demo

We would like to acknowledge @08Tc3wBB for their assistance.

Entry added February 1, 2021

WebRTC

We would like to acknowledge Philipp Hancke for their assistance.

Entry added February 1, 2021

Wi-Fi

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

Entry added February 1, 2021

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