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About the security content of iOS 11.2
This document describes the security content of iOS 11.2.
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 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
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: A memory corruption issue was addressed with improved memory handling.
CVE-2017-7162: an anonymous researcher
Entry added December 21, 2017
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 read kernel memory
Description: Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache.
CVE-2017-5754: Jann Horn of Google Project Zero, Werner Haas and Thomas Prescher of Cyberus Technology GmbH, and Daniel Gruss, Moritz Lipp, Stefan Mangard and Michael Schwarz from Graz University of Technology
Entry added January 4, 2018
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-2017-13867: Ian Beer of Google Project Zero
CVE-2017-13876: Ian Beer of Google Project Zero
Entry updated December 21, 2017
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: 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
Kernel
Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation
Impact: A local user may be able to cause unexpected system termination or read kernel memory
Description: An input validation issue existed in the kernel. This issue was addressed through improved input validation.
CVE-2017-7154: Jann Horn of Google Project Zero
Entry added December 21, 2017
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
Mail Message Framework
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-2017-7152: Oliver Paukstadt of Thinking Objects GmbH (to.com)
Entry added December 21, 2017
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-2017-7160: an anonymous researcher
CVE-2017-13866: an anonymous researcher
Entry added December 13, 2017
Entry updated December 21, 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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Published Date: Jan 5, 2018
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