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
App 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 App Store
Description: An input validation issue was addressed through improved input validation.
CVE-2017-7164: Jerry Decime
Auto Unlock
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 race condition was addressed with additional validation.
CVE-2017-13905: Samuel Groß (@5aelo)
Calculator
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 alter currency conversion rates
Description: Exchange rates were retrieved from HTTP rather than HTTPS. This was addressed by enabling HTTPS for exchange rates.
CVE-2017-2411: Richard Shupak (linkedin.com/in/rshupak), Seth Vargo (@sethvargo) of Google and an anonymous researcher
CFNetwork Session
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-2017-7172: Richard Zhu (fluorescence) working with Trend Micro's Zero Day Initiative
CoreAnimation
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 elevated privileges
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2017-7171: 360 Security working with Trend Micro's Zero Day Initiative, and Tencent Keen Security Lab (@keen_lab) 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: An application may be able to gain elevated privileges
Description: A race condition was addressed with additional validation.
CVE-2017-7151: Samuel Groß (@5aelo)
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: 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 kernel privileges
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2017-7162: Tencent Keen Security Lab (@keen_lab) working with Trend Micro's Zero Day Initiative
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 privileges
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-2017-13904: Kevin Backhouse of Semmle Ltd.
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 (Meltdown)
Description: Systems with microprocessors utilising speculative execution and indirect branch prediction may allow unauthorised 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; Moritz Lipp of Graz University of Technology; Michael Schwarz of Graz University of Technology; Daniel Gruss of Graz University of Technology; Thomas Prescher of Cyberus Technology GmbH; Werner Haas of Cyberus Technology GmbH; Stefan Mangard of Graz University of Technology; Paul Kocher; Daniel Genkin of University of Pennsylvania and University of Maryland; Yuval Yarom of University of Adelaide and Data61; and Mike Hamburg of Rambus (Cryptography Research Division)
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
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-2017-7173: 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 sanitisation.
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
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 privilege
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2017-13880: Apple
Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation
Impact: Incorrect certificate is used for encryption
Description: An S/MIME issue existed in the handling of encrypted email. This issue was addressed through improved selection of the encryption certificate.
CVE-2017-13874: Nicolas Devillard
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)
ReplayKit
Available for: iPhone 5s and later, iPad Air and later, and iPod touch 6th generation
Impact: A user may not have control over their screen broadcast
Description: A type confusion issue was addressed with improved memory handling.
CVE-2017-13888: Dan Niemeyer of Microsoft, Peter Pau (ArcanaArt.com)
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 through improved state management.
CVE-2017-13891: Janne Raiskila (@raiskila)
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-2017-13885: 360 Security 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: Processing maliciously crafted web content may lead to arbitrary code execution
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2017-7165: 360 Security 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: Processing maliciously crafted web content may lead to arbitrary code execution
Description: Multiple memory corruption issues were addressed with improved memory handling.
CVE-2017-13884: 360 Security 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: Visiting a malicious website may lead to user interface spoofing
Description: Redirect responses to 401 Unauthorised may allow a malicious website to incorrectly display the lock icon on mixed content. This issue was addressed through improved URL display logic.
CVE-2017-7153: Jerry Decime
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: Yuan Deng of Ant-financial Light-Year Security Lab
CVE-2017-7157: an anonymous researcher
CVE-2017-13856: Jeonghoon Shin
CVE-2017-13870: Tencent Keen Security Lab (@keen_lab) working with Trend Micro's Zero Day Initiative
CVE-2017-7160: Richard Zhu (fluorescence) working with Trend Micro's Zero Day Initiative
CVE-2017-13866: Tencent Keen Security Lab (@keen_lab) working with Trend Micro's Zero Day Initiative
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
Impact: An attacker in Wi-Fi range may force nonce re-use 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
Additional recognition
WebKit
We would like to acknowledge Yiğit Can YILMAZ (@yilmazcanyigit) and researcher Abhinash Jain (@abhinashjain) for their assistance.
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