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
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
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
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