About the security content of macOS High Sierra 10.13.2, Security Update 2017-002 Sierra, and Security Update 2017-005 El Capitan

This document describes the security content of macOS High Sierra 10.13.2, Security Update 2017-002 Sierra, and Security Update 2017-005 El Capitan.

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.

macOS High Sierra 10.13.2, Security Update 2017-002 Sierra, and Security Update 2017-005 El Capitan

APFS

Available for: macOS High Sierra 10.13.1

Impact: APFS encryption keys may not be securely deleted after hibernating

Description: A logic issue existed in APFS when deleting keys during hibernation. This was addressed with improved state management.

CVE-2017-13887: David Ryskalczyk

apache

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Impact: Processing a maliciously crafted Apache configuration directive may result in the disclosure of process memory

Description: Multiple issues were addressed by updating to version 2.4.28.

CVE-2017-9798: Hanno Böck

Auto Unlock

Available for: macOS High Sierra 10.13.1

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)

CFNetwork Session

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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

Contacts

Available for: macOS High Sierra 10.13.1

Impact: Sharing contact information may lead to unexpected data sharing

Description: An issue existed in the handling of Contact sharing. This issue was addressed with improved handling of user information.

CVE-2017-13892: Ryan Manly of Glenbrook High School District 225

CoreAnimation

Available for: macOS High Sierra 10.13.1

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: macOS High Sierra 10.13.1

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)

curl

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Impact: Malicious FTP servers may be able to cause the client to read out-of-bounds memory

Description: An out-of-bounds read issue existed in the FTP PWD response parsing. This issue was addressed with improved bounds checking.

CVE-2017-1000254: Max Dymond

Directory Utility

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Not impacted: macOS Sierra 10.12.6 and earlier

Impact: An attacker may be able to bypass administrator authentication without supplying the administrator’s password

Description: A logic error existed in the validation of credentials. This was addressed with improved credential validation.

CVE-2017-13872

ICU

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Impact: An application may be able to read restricted memory

Description: An integer overflow was addressed through improved input validation.

CVE-2017-15422: Yuan Deng of Ant-financial Light-Year Security Lab

Intel Graphics Driver

Available for: macOS High Sierra 10.13.1

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-2017-13883: Yu Wang of Didi Research America

CVE-2017-7163: Yu Wang of Didi Research America

CVE-2017-7155: Yu Wang of Didi Research America

Intel Graphics Driver

Available for: macOS High Sierra 10.13.1

Impact: A local user may be able to cause unexpected system termination or read kernel memory

Description: An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed through improved input validation.

CVE-2017-13878: Ian Beer of Google Project Zero

Intel Graphics Driver

Available for: macOS High Sierra 10.13.1

Impact: An application may be able to execute arbitrary code with system privileges

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

CVE-2017-13875: Ian Beer of Google Project Zero

IOAcceleratorFamily

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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-2017-7159: found by IMF developed by HyungSeok Han (daramg.gift) of SoftSec, KAIST (softsec.kaist.ac.kr)

IOKit

Available for: macOS High Sierra 10.13.1

Impact: An application may be able to execute arbitrary code with system privileges

Description: An input validation issue existed in the kernel. This issue was addressed through improved input validation.

CVE-2017-13848: Alex Plaskett of MWR InfoSecurity

CVE-2017-13858: an anonymous researcher

IOKit

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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

Kernel

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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: macOS High Sierra 10.13.1

Impact: An application may be able to read kernel memory (Meltdown)

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; 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: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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

Kernel

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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: macOS High Sierra 10.13.1

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-2017-13876: Ian Beer of Google Project Zero

Kernel

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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: macOS High Sierra 10.13.1

Impact: An application may be able to read restricted memory

Description: A validation issue was addressed with improved input sanitization.

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

Kernel

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Impact: An application may be able to read restricted memory

Description: A validation issue was addressed with improved input sanitization.

CVE-2017-13868: Brandon Azad

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

Kernel

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

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

Mail

Available for: macOS High Sierra 10.13.1

Impact: A S/MIME encrypted email may be inadvertently sent unencrypted if the receiver's S/MIME certificate is not installed

Description: An inconsistent user interface issue was addressed with improved state management.

CVE-2017-13871: Lukas Pitschl of GPGTools

Mail Drafts

Available for: macOS High Sierra 10.13.1

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

OpenSSL

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Impact: An application may be able to read restricted memory

Description: An out-of-bounds read issue existed in X.509 IPAddressFamily parsing. This issue was addressed with improved bounds checking.

CVE-2017-3735: found by OSS-Fuzz

Perl

Available for: macOS Sierra 10.12.6

Impact: This bugs can allow remote attackers to cause a denial of service

Description: Public CVE-2017-12837 was addressed by updating the function in Perl 5.18

CVE-2017-12837: Jakub Wilk

Screen Sharing Server

Available for: macOS Sierra 10.12.6, macOS High Sierra 10.13.1

Impact: A user with screen sharing access may be able to access any file readable by root

Description: A permissions issue existed in the handling of screen sharing sessions. This issue was addressed with improved permissions handling.

CVE-2017-7158: Trevor Jacques of Toronto

SIP

Available for: macOS High Sierra 10.13.1

Impact: An application may be able to execute arbitrary code with kernel privileges

Description: A configuration issue was addressed with additional restrictions.

CVE-2017-13911: Timothy Perfitt of Twocanoes Software

Wi-Fi

Available for: macOS High Sierra 10.13.1

Impact: An unprivileged user may change Wi-Fi system parameters leading to denial of service

Description: An access issue existed with privileged Wi-Fi system configuration. This issue was addressed with additional restrictions.

CVE-2017-13886: David Kreitschmann and Matthias Schulz of Secure Mobile Networking Lab at TU Darmstadt

Additional recognition

Mail

We would like to acknowledge Jon Bottarini of HackerOne for their assistance.