About the security content of iOS 11.2

This document describes the security content of iOS 11.2.

About Apple security updates

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

iOS 11.2

Released December 2, 2017

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 system privileges

Description: Multiple memory corruption issues were addressed through improved state management.

CVE-2017-13847: Ian Beer of Google Project Zero

IOMobileFrameBuffer

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 privilege

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

CVE-2017-13879: Apple

IOSurface

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-2017-13861: 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-2017-13862: Apple

CVE-2017-13876: 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 read restricted memory

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

CVE-2017-13833: Brandon Azad

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

CVE-2017-13855: Jann Horn of Google Project Zero

Kernel

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 memory handling.

CVE-2017-13867: 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 read restricted memory

Description: Multiple validation issues were addressed with improved input sanitization.

CVE-2017-13865: Ian Beer of Google Project Zero

CVE-2017-13868: Brandon Azad

CVE-2017-13869: Jann Horn of Google Project Zero

Mail

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

Impact: Incorrect certificate is used for encryption

Description: A S/MIME issue existed in the handling of encrypted email. This issue was addressed through improved selection of the encryption certificate.

CVE-2017-13874: an anonymous researcher

Mail Drafts

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

Impact: An attacker with a privileged network position may be able to intercept mail

Description: An encryption issue existed with S/MIME credentials. The issue was addressed with additional checks and user control.

CVE-2017-13860: Michael Weishaar of INNEO Solutions GmbH

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-2017-7156: an anonymous researcher

CVE-2017-7157: an anonymous researcher

CVE-2017-13856: Jeonghoon Shin

CVE-2017-13870: an anonymous researcher

CVE-2017-13866: an anonymous researcher

Entry added December 13, 2017

Wi-Fi

Available for: iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, iPhone SE, iPhone 5s, 12.9-inch iPad Pro 1st generation, iPad Air 2, iPad Air, iPad 5th generation, iPad mini 4, iPad mini 3, iPad mini 2, and iPod touch 6th generation
Released for iPhone 7 and later and iPad Pro 9.7-inch (early 2016) and later in iOS 11.1.

Impact: An attacker in Wi-Fi range may force nonce reuse in WPA multicast/GTK clients (Key Reinstallation Attacks - KRACK)

Description: A logic issue existed in the handling of state transitions. This was addressed with improved state management.

CVE-2017-13080: Mathy Vanhoef of the imec-DistriNet group at KU Leuven

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