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 taken place 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
Analytics
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 with improved checks.
CVE-2021-1761: Cees Elzinga
APFS
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 user may be able to read arbitrary files
Description: the issue was addressed with improved permissions logic.
CVE-2021-1797: Thomas Tempelmann
Bluetooth
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 arbitrary code execution
Description: an out-of-bounds read was addressed with improved input validation.
CVE-2021-1794: Jianjun Dai of 360 Alpha Lab
Bluetooth
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 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
Bluetooth
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 a privileged position may be able to perform a denial-of-service attack
Description: A memory initialisation issue was addressed with improved memory handling.
CVE-2021-1780: Jianjun Dai of 360 Alpha Lab
CoreAnimation
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 could execute arbitrary code, which could lead to user information being compromised
Description: A memory corruption issue was addressed with improved state management.
CVE-2021-1760: @S0rryMybad of 360 Vulcan Team
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 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
CoreGraphics
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 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
CoreMedia
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: an out-of-bounds read was addressed with improved input validation.
CVE-2021-1759: Hou JingYi (@hjy79425575) of Qihoo 360 CERT
CoreText
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 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)
CoreText
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 arbitrary code execution
Description: an out-of-bounds read was addressed with improved bounds checking.
CVE-2021-1792: Mickey Jin and Junzhi Lu of Trend Micro (working with Trend Micro’s Zero Day Initiative)
Crash Reporter
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 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
Crash Reporter
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 elevate their privileges
Description: multiple issues were addressed with improved logic.
CVE-2021-1787: James Hutchins
FairPlay
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 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)
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: 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
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 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
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 a denial of service
Description: This issue was addressed with improved checks.
CVE-2021-1766: Danny Rosseau of Carve Systems
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: an out-of-bounds read was addressed with improved input validation.
CVE-2021-1785: Xingwei Lin of Ant Security Light-Year Lab
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: an out-of-bounds write was addressed with improved input validation.
CVE-2021-1737: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-1738: Lei Sun
CVE-2021-1744: Xingwei Lin of Ant Security Light-Year Lab
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: 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
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-2021-1838: Mickey Jin and Qi Sun of Trend Micro (working with Trend Micro’s Zero Day Initiative)
CVE-2021-1742: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-1746: Xingwei Lin of Ant Security Light-Year Lab, Mickey Jin and Qi Sun of Trend Micro (working with Trend Micro’s Zero Day Initiative) and Jeonghoon Shin (@singi21a) of THEORI
CVE-2021-1754: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-1774: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-1793: Xingwei Lin of Ant Security Light-Year Lab
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: 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 and Junzhi Lu of Trend Micro (working with Trend Micro’s Zero Day Initiative) and Xingwei Lin of Ant Security Light-Year Lab
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 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
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: an access issue was addressed with improved memory management.
CVE-2021-1783: Xingwei Lin of Ant Security Light-Year Lab
IOSkywalkFamily
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 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
iTunes Store
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 URL may lead to arbitrary JavaScript code execution.
Description: a validation issue was addressed with improved input sanitisation.
CVE-2021-1748: CodeColorist (working with Ant Security Light-Year 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 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
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: an application may be able to execute arbitrary code with kernel privileges
Description: multiple issues were addressed with improved logic.
CVE-2021-1750: @0xalsr
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 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 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 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
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 lead to an 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)
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 lead to an unexpected application termination or arbitrary code execution
Description: an out-of-bounds read was addressed with improved bounds checking.
CVE-2021-1768: Mickey Jin and Junzhi Lu of Trend Micro (working with Trend Micro’s Zero Day Initiative)
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 lead to an unexpected application termination or arbitrary code execution
Description: an out-of-bounds read was addressed with improved input validation.
CVE-2021-1745: Mickey Jin and Junzhi Lu of Trend Micro (working with Trend Micro’s Zero Day Initiative)
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 lead to an 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
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 lead to an 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)
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 image may lead to heap corruption.
Description: This issue was addressed with improved checks.
CVE-2021-1767: Mickey Jin and Junzhi Lu of Trend Micro (working with Trend Micro’s Zero Day Initiative)
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 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
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 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)
Phone Keypad
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: 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)
Swift
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 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 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: 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)
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-2021-1789: @S0rryMybad of 360 Vulcan Team
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: 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
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: 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 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 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 and Ben Seri of Armis Security, and Samy Kamkar
XNU
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 type confusion issue was addressed with improved state handling.
CVE-2021-30869: Apple
Additional recognition
iTunes Store
We would like to acknowledge CodeColorist of Ant-Financial Light-Year Lab for their assistance.
Kernel
We would like to acknowledge Junzhi Lu (@pwn0rz), Mickey Jin and Jesse Change of Trend Micro for their assistance.
libpthread
We would like to acknowledge CodeColorist of Ant-Financial Light-Year Lab for their assistance.
We would like to acknowledge Yiğit Can Yilmaz (@yilmazcanyigit) and an anonymous researcher for their assistance.
Store Demo
We would like to acknowledge @08Tc3wBB for their assistance.
WebRTC
We would like to acknowledge Philipp Hancke for their assistance.
Wi-Fi
We would like to acknowledge an anonymous researcher for their assistance.
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