About the security content of iOS 12.1.1

This document describes the security content of iOS 12.1.1.

About Apple security updates

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

iOS 12.1.1

Released December 5, 2018

Airport

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 type confusion issue was addressed with improved memory handling.

CVE-2018-4303: Mohamed Ghannam (@_simo36)

Disk Images

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-2018-4465: Pangu Team

FaceTime

Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th 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-2018-4430: videosdebarraquito

File Provider

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

Impact: A malicious application may be able to learn information about the presence of other applications on the device

Description: This issue was addressed with improved entitlements.

CVE-2018-4446: Luke Deshotels, Jordan Beichler, and William Enck of North Carolina State

University; Costin Carabaș and Răzvan Deaconescu of University POLITEHNICA of Bucharest

Kernel

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

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

Description: A denial of service issue was addressed by removing the vulnerable code.

CVE-2018-4460: Kevin Backhouse of Semmle Security Research Team

Kernel

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

Impact: A local user may be able to read kernel memory

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

CVE-2018-4431:  An independent security researcher has reported this vulnerability to

Beyond Security’s SecuriTeam Secure Disclosure program

Kernel

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 logic issue was addressed with improved restrictions.

CVE-2018-4435: Jann Horn of Google Project Zero, Juwei Lin(@panicaII) and Junzhi Lu of TrendMicro Mobile Security Team

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 state management.

CVE-2018-4447: Juwei Lin(@panicaII) and Zhengyu Dong of TrendMicro Mobile Security Team

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 input validation.

CVE-2018-4461: Ian Beer of Google Project Zero

LinkPresentation

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

Impact: Processing a maliciously crafted email may lead to user interface spoofing

Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

CVE-2018-4429: Victor Le Pochat of imec-DistriNet, KU Leuven

Profiles

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

Impact: An untrusted configuration profile may be incorrectly displayed as verified

Description: A certificate validation issue existed in configuration profiles. This was addressed with additional checks.

CVE-2018-4436: James Seeley @Code4iOS, Joseph S. of Wyong High School

Safari

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

Impact: Visiting a malicious website may lead to user interface spoofing

Description: A logic issue was addressed with improved validation.

CVE-2018-4439: xisigr of Tencent's Xuanwu Lab (tencent.com)

Safari

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: A logic issue was addressed with improved state management.

CVE-2018-4440: Wenxu Wu of Tencent Security Xuanwu Lab (xlab.tencent.com)

Safari

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

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

Description: "Clear History and Website Data" did not clear the history. The issue was addressed with improved data deletion.

CVE-2018-4445: William Breuer

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 memory handling.

CVE-2018-4441: lokihardt of Google Project Zero

CVE-2018-4442: lokihardt of Google Project Zero

CVE-2018-4443: lokihardt of Google Project Zero

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 logic issue existed resulting in memory corruption. This was addressed with improved state management.

CVE-2018-4438: lokihardt of Google Project Zero

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-2018-4437: HyungSeok Han, DongHyeon Oh, and Sang Kil Cha of KAIST Softsec Lab, Korea

CVE-2018-4464: HyungSeok Han, DongHyeon Oh, and Sang Kil Cha of KAIST Softsec Lab, Korea

Additional recognition

Profiles

We would like to acknowledge Luke Deshotels, Jordan Beichler, and William Enck of North Carolina State University, and Costin Carabaș and Răzvan Deaconescu of University POLITEHNICA of Bucharest for their assistance.

SafariViewController

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

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