About the security content of iOS 12

This document describes the security content of iOS 12.

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.

For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.

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

iOS 12

Accounts

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A local app may be able to read a persistent account identifier

Description: This issue was addressed with improved entitlements.

CVE-2018-4322: Min (Spark) Zheng, Xiaolong Bai of Alibaba Inc.

Auto Unlock

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious application may be able to access local users AppleIDs

Description: A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement.

CVE-2018-4321: Min (Spark) Zheng, Xiaolong Bai of Alibaba Inc.

Bluetooth

Available for: iPhone SE, iPhone 6s, iPhone 6s Plus, iPhone 7, iPhone 7 Plus, iPad Mini 4, 12.9-inch iPad Pro 1st generation, 12.9-inch iPad Pro 2nd generation, 10.5-inch iPad Pro, 9.7-inch iPad Pro, iPad 5th generation, and iPod Touch 6th generation

Impact: An attacker in a privileged network position may be able to intercept Bluetooth traffic

Description: An input validation issue existed in Bluetooth. This issue was addressed with improved input validation.

CVE-2018-5383: Lior Neumann and Eli Biham

CFNetwork

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4126: Bruno Keith (@bkth_) working with Trend Micro's Zero Day Initiative

CoreFoundation

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious application may be able to elevate privileges

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

CVE-2018-4412: The UK's National Cyber Security Centre (NCSC)

CoreFoundation

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An application may be able to gain elevated privileges

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

CVE-2018-4414: The UK's National Cyber Security Centre (NCSC)

CoreMedia

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An app may be able to learn information about the current camera view before being granted camera access

Description: A permissions issue existed. This issue was addressed with improved permission validation.

CVE-2018-4356: an anonymous researcher

CoreText

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Processing a maliciously crafted text file may lead to arbitrary code execution

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

CVE-2018-4347: Vasyl Tkachuk of Readdle

Crash Reporter

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An application may be able to read restricted memory

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

CVE-2018-4333: Brandon Azad

dyld

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious application may be able to modify protected parts of the file system

Description: A configuration issue was addressed with additional restrictions.

CVE-2018-4433: Vitaly Cheptsov

Grand Central Dispatch

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4426: Brandon Azad

Heimdal

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4331: Brandon Azad

CVE-2018-4332: Brandon Azad

CVE-2018-4343: Brandon Azad

iBooks

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Parsing a maliciously crafted iBooks file may lead to disclosure of user information

Description: A configuration issue was addressed with additional restrictions.

CVE-2018-4355: evi1m0 of bilibili security team

IOHIDFamily

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

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

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

CVE-2018-4408: Ian Beer of Google Project Zero

IOKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious application may be able to break out of its sandbox

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

CVE-2018-4341: Ian Beer of Google Project Zero

CVE-2018-4354: Ian Beer of Google Project Zero

IOKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

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

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

CVE-2018-4383: Apple

IOMobileFrameBuffer

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An application may be able to read restricted memory

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

CVE-2018-4335: Brandon Azad

IOUserEthernet

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4401: Apple

iTunes Store

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An attacker in a privileged network position may be able to spoof password prompts in the iTunes Store

Description: An input validation issue was addressed with improved input validation.

CVE-2018-4305: Jerry Decime

Kernel

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An application may be able to read restricted memory

Description: An input validation issue existed in the kernel. This issue was addressed with improved input validation.

CVE-2018-4363: Ian Beer of Google Project Zero

Kernel

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4336: Brandon Azad

CVE-2018-4337: Ian Beer of Google Project Zero

CVE-2018-4340: Mohamed Ghannam (@_simo36)

CVE-2018-4344: The UK's National Cyber Security Centre (NCSC)

CVE-2018-4425: cc working with Trend Micro's Zero Day Initiative, Juwei Lin (@panicaII) of Trend Micro working with Trend Micro's Zero Day Initiative

Kernel

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious application may be able to leak sensitive user information

Description: An access issue existed with privileged API calls. This issue was addressed with additional restrictions.

CVE-2018-4399: Fabiano Anemone (@anoane)

Kernel

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An attacker in a privileged network position may be able to execute arbitrary code

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

CVE-2018-4407: Kevin Backhouse of Semmle Ltd.

mDNSOffloadUserClient

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4326: an anonymous researcher working with Trend Micro's Zero Day Initiative, Zhuo Liang of Qihoo 360 Nirvan Team

MediaRemote

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A sandboxed process may be able to circumvent sandbox restrictions

Description: An access issue was addressed with additional sandbox restrictions.

CVE-2018-4310: CodeColorist of Ant-Financial LightYear Labs

Messages

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A local user may be able to discover a user’s deleted messages

Description: A consistency issue existed in the handling of application snapshots. The issue was addressed with improved handling of message deletions.

CVE-2018-4313: 11 anonymous researchers, David Scott, Enes Mert Ulu of Abdullah Mürşide Özünenek Anadolu Lisesi - Ankara/Türkiye, Mehmet Ferit Daştan of Van Yüzüncü Yıl University, Metin Altug Karakaya of Kaliptus Medical Organization, Vinodh Swami of Western Governor's University (WGU)

Notes

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A local user may be able to discover a user’s deleted notes

Description: A consistency issue existed in the handling of application snapshots. The issue was addressed with improved handling of notes deletions.

CVE-2018-4352: Utku Altinkaynak

Safari

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A local user may be able to discover websites a user has visited

Description: A consistency issue existed in the handling of application snapshots. The issue was addressed with improved handling of application snapshots.

CVE-2018-4313: 11 anonymous researchers, David Scott, Enes Mert Ulu of Abdullah Mürşide Özünenek Anadolu Lisesi - Ankara/Türkiye, Mehmet Ferit Daştan of Van Yüzüncü Yıl University, Metin Altug Karakaya of Kaliptus Medical Organization, Vinodh Swami of Western Governor's University (WGU)

Safari

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A user may be unable to delete browsing history items

Description: Clearing a history item may not clear visits with redirect chains. The issue was addressed with improved data deletion.

CVE-2018-4329: Hugo S. Diaz (coldpointblue)

Safari

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious website may be able to exfiltrate autofilled data in Safari

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

CVE-2018-4307: Rafay Baloch of Pakistan Telecommunications Authority

SafariViewController

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Visiting a malicious website may lead to address bar spoofing

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

CVE-2018-4362: Jun Kokatsu (@shhnjk)

Security

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A local user may be able to cause a denial of service

Description: This issue was addressed with improved checks.

CVE-2018-4395: Patrick Wardle of Digita Security

Security

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An attacker may be able to exploit weaknesses in the RC4 cryptographic algorithm

Description: This issue was addressed by removing RC4.

CVE-2016-1777: Pepi Zawodsky

Status Bar

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A person with physical access to an iOS device may be able to determine the last used app from the lock screen

Description: A logic issue was addressed with improved restrictions.

CVE-2018-4325: Brian Adeloye

Symptom Framework

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: An application may be able to read restricted memory

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

CVE-2018-4203: Bruno Keith (@bkth_) working with Trend Micro's Zero Day Initiative

Text

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Processing a maliciously crafted text file may lead to a denial of service

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

CVE-2018-4304: jianan.huang (@Sevck)

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious website may be able to execute scripts in the context of another website

Description: A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation.

CVE-2018-4309: an anonymous researcher working with Trend Micro's Zero Day Initiative

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Unexpected interaction causes an ASSERT failure

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

CVE-2018-4361: found by OSS-Fuzz

CVE-2018-4474: found by OSS-Fuzz

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Cross-origin SecurityErrors includes the accessed frame’s origin

Description: The issue was addressed by removing origin information.

CVE-2018-4311: Erling Alf Ellingsen (@steike)

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4299: Samuel Groβ (saelo) working with Trend Micro's Zero Day Initiative

CVE-2018-4323: Ivan Fratric of Google Project Zero

CVE-2018-4328: Ivan Fratric of Google Project Zero

CVE-2018-4358: @phoenhex team (@bkth_ @5aelo @_niklasb) working with Trend Micro's Zero Day Initiative

CVE-2018-4359: Samuel Groß (@5aelo)

CVE-2018-4360: William Bowling (@wcbowling)

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious website may cause unexepected cross-origin behavior

Description: A cross-origin issue existed with iframe elements. This was addressed with improved tracking of security origins.

CVE-2018-4319: John Pettitt of Google

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

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

CVE-2018-4316: crixer, Hanming Zhang (@4shitak4) of Qihoo 360 Vulcan Team

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: Unexpected interaction causes an ASSERT failure

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

CVE-2018-4191: found by OSS-Fuzz

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation

Impact: A malicious website may exfiltrate image data cross-origin

Description: A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation.

CVE-2018-4345: Jun Kokatsu (@shhnjk)

WebKit

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4315: Ivan Fratric of Google Project Zero

CVE-2018-4197: Ivan Fratric of Google Project Zero

CVE-2018-4312: Ivan Fratric of Google Project Zero

CVE-2018-4306: Ivan Fratric of Google Project Zero

CVE-2018-4318: Ivan Fratric of Google Project Zero

CVE-2018-4317: Ivan Fratric of Google Project Zero

CVE-2018-4314: Ivan Fratric of Google Project Zero

Additional recognition

APFS

We would like to acknowledge Umang Raghuvanshi for their assistance.

Assets

We would like to acknowledge Brandon Azad for their assistance.

configd

We would like to acknowledge Sabri Haddouche (@pwnsdx) of Wire Swiss GmbH for their assistance.

Core Data

We would like to acknowledge Andreas Kurtz (@aykay) of NESO Security Labs GmbH for their assistance.

CoreSymbolication

We would like to acknowledge Brandon Azad for their assistance.

Exchange ActiveSync

We would like to acknowledge an anonymous researcher, Jesse Thompson of University of Wisconsin-Madison for their assistance.

Feedback Assistant

We would like to acknowledge Marco Grassi (@marcograss) of KeenLab (@keen_lab) Tencent working with Trend Micro’s Zero Day Initiative for their assistance.

Kernel

We would like to acknowledge Brandon Azad for their assistance.

Mail

We would like to acknowledge Alessandro Avagliano of Rocket Internet SE, Gunnar Diepenbruck, and Zbyszek Żółkiewski for their assistance.

MediaRemote

We would like to acknowledge Brandon Azad for their assistance.

Quick Look

We would like to acknowledge lokihardt of Google Project Zero for their assistance.

Safari

We would like to acknowledge Marcel Manz of SIMM-Comm GmbH and Vlad Galbin for their assistance.

Sandbox Profiles

We would like to acknowledge Tencent Keen Security Lab working with Trend Micro's Zero Day Initiative for their assistance.

Security

We would like to acknowledge Christoph Sinai, Daniel Dudek (@dannysapples) of The Irish Times and Filip Klubička (@lemoncloak) of ADAPT Centre, Dublin Institute of Technology, Horatiu Graur of SoftVision, Istvan Csanady of Shapr3D, Omar Barkawi of ITG Software, Inc., Phil Caleno, Wilson Ding, an anonymous researcher for their assistance.

SQLite

We would like to acknowledge Andreas Kurtz (@aykay) of NESO Security Labs GmbH for their assistance.

Status Bar

We would like to acknowledge Ju Zhu of Meituan and Moony Li and Lilang Wu of Trend Micro for their assistance.

WebKit

We would like to acknowledge Cary Hartline, Hanming Zhang from 360 Vuclan team, Tencent Keen Security Lab working with Trend Micro's Zero Day Initiative, and Zach Malone of CA Technologies for their assistance.