About the security content of macOS High Sierra 10.13

This document describes the security content of macOS High Sierra 10.13.

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

802.1X

Available for: OS X Mountain Lion 10.8 and later

Impact: An attacker may be able to exploit weaknesses in TLS 1.0

Description: A protocol security issue was addressed by enabling TLS 1.1 and TLS 1.2.

CVE-2017-13832: Doug Wussler of Florida State University

apache

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in Apache

Description: Multiple issues existed in Apache. These were addressed by updating Apache to version 2.4.25.

CVE-2016-0736

CVE-2016-2161

CVE-2016-5387

CVE-2016-8740

CVE-2016-8743

Apple Account Settings

Available for: OS X Mountain Lion 10.8 and later

Impact: A local attacker may gain access to iCloud authentication tokens

Description: An issue existed in the storage of sensitive tokens. This issue was addressed by placing the tokens in Keychain.

CVE-2017-13909: Andreas Nilsson

AppleScript

Available for: OS X Mountain Lion 10.8 and later

Impact: Decompiling an AppleScript with osadecompile may lead to arbitrary code execution

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

CVE-2017-13809: bat0s

Application Firewall

Available for: OS X Mountain Lion 10.8 and later

Impact: A previously denied application firewall setting may take effect after upgrading

Description: An upgrade issue existed in the handling of firewall settings. This issue was addressed through improved handling of firewall settings during upgrades.

CVE-2017-7084: an anonymous researcher

AppSandbox

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to cause a denial of service

Description: Multiple denial-of-service issues were addressed through improved memory handling.

CVE-2017-7074: Daniel Jalkut of Red Sweater Software

ATS

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing a maliciously crafted font may result in the disclosure of process memory

Description: A memory corruption issue was addressed with improved input validation.

CVE-2017-13820: John Villamil, Doyensec

Audio

Available for: OS X Mountain Lion 10.8 and later

Impact: Parsing a maliciously crafted QuickTime file may lead to an unexpected application termination or arbitrary code execution

Description: A memory consumption issue was addressed through improved memory handling.

CVE-2017-13807: Yangkang (@dnpushme) of Qihoo 360 Qex Team

Captive Network Assistant

Available for: OS X Mountain Lion 10.8 and later

Impact: A local user may unknowingly send a password unencrypted over the network

Description: The security state of the captive portal browser was not obvious. This issue was addressed with improved visibility of the captive portal browser security state.

CVE-2017-7143: Matthew Green of Johns Hopkins University

CFNetwork

Available for: OS X Mountain Lion 10.8 and later

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-2017-13829: Niklas Baumstark and Samuel Gro working with Trend Micro's Zero Day Initiative

CVE-2017-13833: Niklas Baumstark and Samuel Gro working with Trend Micro's Zero Day Initiative

CFNetwork Proxies

Available for: OS X Mountain Lion 10.8 and later

Impact: An attacker in a privileged network position may be able to cause a denial of service

Description: Multiple denial-of-service issues were addressed through improved memory handling.

CVE-2017-7083: Abhinav Bansal of Zscaler Inc.

CFString

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

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

CVE-2017-13821: Australian Cyber Security Centre – Australian Signals Directorate

CoreAudio

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

Description: An out-of-bounds read was addressed by updating to Opus version 1.1.4.

CVE-2017-0381: V.E.O (@VYSEa) of Mobile Threat Research Team, Trend Micro

CoreText

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing a maliciously crafted font file may lead to arbitrary code execution

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

CVE-2017-13825: Australian Cyber Security Centre – Australian Signals Directorate

CoreTypes

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing a maliciously crafted webpage may result in the mounting of a disk image

Description: A logic issue was addressed with improved restrictions.

CVE-2017-13890: Apple, Theodor Ragnar Gislason of Syndis

DesktopServices

Available for: OS X Mountain Lion 10.8 and later

Impact: A local attacker may be able to observe unprotected user data

Description: A file access issue existed with certain home folder files. This was addressed with improved access restrictions.

CVE-2017-13851: Henrique Correa de Amorim

Directory Utility

Available for: OS X Mountain Lion 10.8 and later

Impact: A local attacker may be able to determine the Apple ID of the owner of the computer

Description: A permissions issue existed in the handling of the Apple ID. This issue was addressed with improved access controls.

CVE-2017-7138: Daniel Kvak of Masaryk University

file

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in file

Description: Multiple issues were addressed by updating to version 5.30.

CVE-2017-7121: found by OSS-Fuzz

CVE-2017-7122: found by OSS-Fuzz

CVE-2017-7123: found by OSS-Fuzz

CVE-2017-7124: found by OSS-Fuzz

CVE-2017-7125: found by OSS-Fuzz

CVE-2017-7126: found by OSS-Fuzz

file

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in file

Description: Multiple issues were addressed by updating to version 5.31.

CVE-2017-13815

Fonts

Available for: OS X Mountain Lion 10.8 and later

Impact: Rendering untrusted text may lead to spoofing

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

CVE-2017-13828: Leonard Grey and Robert Sesek of Google Chrome

fsck_msdos

Available for: OS X Mountain Lion 10.8 and later

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-2017-13811: V.E.O. (@VYSEa) of Mobile Advanced Threat Team of Trend Micro

fsck_msdos

Available for: OS X Mountain Lion 10.8 and later

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-2017-13835: an anonymous researcher

Heimdal

Available for: OS X Mountain Lion 10.8 and later

Impact: An attacker in a privileged network position may be able to impersonate a service

Description: A validation issue existed in the handling of the KDC-REP service name. This issue was addressed through improved validation.

CVE-2017-11103: Jeffrey Altman, Viktor Duchovni and Nico Williams

HelpViewer

Available for: OS X Mountain Lion 10.8 and later

Impact: A quarantined HTML file may execute arbitrary JavaScript cross-origin

Description: A cross-site scripting issue existed in HelpViewer. This issue was addressed by removing the affected file.

CVE-2017-13819: Filippo Cavallarin of SecuriTeam Secure Disclosure

HFS

Available for: OS X Mountain Lion 10.8 and later

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-2017-13830: Sergej Schumilo of Ruhr-University Bochum

ImageIO

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing a maliciously crafted image may lead to arbitrary code execution

Description: A memory corruption issue was addressed with improved input validation.

CVE-2017-13814: Australian Cyber Security Centre – Australian Signals Directorate

ImageIO

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing a maliciously crafted image may lead to a denial of service

Description: A memory corruption issue was addressed with improved input validation.

CVE-2017-13831: Glen Carmichael

Installer

Available for: OS X Mountain Lion 10.8 and later

Impact: A malicious application may be able to access the FileVault unlock key

Description: This issue was addressed by removing additional entitlements.

CVE-2017-13837: Patrick Wardle of Synack

IOAcceleratorFamily

Available for: OS X Mountain Lion 10.8 and later

Impact: A malicious application may be able to elevate privileges

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

CVE-2017-13906

IOFireWireFamily

Available for: OS X Mountain Lion 10.8 and later

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-2017-7077: Brandon Azad

IOFireWireFamily

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

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

CVE-2017-7119: Xiaolong Bai, Min (Spark) Zheng of Alibaba Inc., Benjamin Gnahm (@mitp0sh) of PDX

Kernel

Available for: OS X Mountain Lion 10.8 and later

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-2017-7114: Alex Plaskett of MWR InfoSecurity

Kernel

Available for: OS X Mountain Lion 10.8 and later

Impact: A local user may be able to leak sensitive user information

Description: A permissions issue existed in kernel packet counters. This issue was addressed through improved permission validation.

CVE-2017-13810: Zhiyun Qian of University of California, Riverside

Kernel

Available for: OS X Mountain Lion 10.8 and later

Impact: A local user may be able to 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-2017-13817: Maxime Villard (m00nbsd)

Kernel

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

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

CVE-2017-13818: The UK's National Cyber Security Centre (NCSC)

CVE-2017-13836: Vlad Tsyrklevich

CVE-2017-13841: Vlad Tsyrklevich

CVE-2017-13840: Vlad Tsyrklevich

CVE-2017-13842: Vlad Tsyrklevich

CVE-2017-13782: Kevin Backhouse of Semmle Ltd.

Kernel

Available for: OS X Mountain Lion 10.8 and later

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-2017-13843: an anonymous researcher, an anonymous researcher

Kernel

Available for: OS X Mountain Lion 10.8 and later

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-2017-13854: shrek_wzw of Qihoo 360 Nirvan Team

Kernel

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing a malformed mach binary may lead to arbitrary code execution

Description: A memory corruption issue was addressed through improved validation.

CVE-2017-13834: Maxime Villard (m00nbsd)

Kernel

Available for: OS X Mountain Lion 10.8 and later

Impact: A malicious application may be able to learn information about the presence and operation of other applications on the device.

Description: An application was able to access network activity information maintained by the operating system unrestricted. This issue was addressed by reducing the information available to third-party applications.

CVE-2017-13873: Xiaokuan Zhang and Yinqian Zhang of The Ohio State University, Xueqiang Wang and XiaoFeng Wang of Indiana University Bloomington, and Xiaolong Bai of Tsinghua University

kext tools

Available for: OS X Mountain Lion 10.8 and later

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

Description: A logic error in kext loading was addressed with improved state handling.

CVE-2017-13827: an anonymous researcher

libarchive

Available for: OS X Mountain Lion 10.8 and later

Impact: Unpacking a maliciously crafted archive may lead to arbitrary code execution

Description: A buffer overflow issue was addressed through improved memory handling.

CVE-2017-13813: found by OSS-Fuzz

CVE-2017-13816: found by OSS-Fuzz

libarchive

Available for: OS X Mountain Lion 10.8 and later

Impact: Unpacking a maliciously crafted archive may lead to arbitrary code execution

Description: Multiple memory corruption issues existed in libarchive. These issues were addressed through improved input validation.

CVE-2017-13812: found by OSS-Fuzz

libarchive

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

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

CVE-2016-4736: an anonymous researcher

libc

Available for: OS X Mountain Lion 10.8 and later

Impact: A remote attacker may be able to cause a denial-of-service

Description: A resource exhaustion issue in glob() was addressed through an improved algorithm.

CVE-2017-7086: Russ Cox of Google

libc

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to cause a denial of service

Description: A memory consumption issue was addressed through improved memory handling.

CVE-2017-1000373

libexpat

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in expat

Description: Multiple issues were addressed by updating to version 2.2.1

CVE-2016-9063

CVE-2017-9233

libxml2

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution

Description: A null pointer dereference was addressed with improved validation.

CVE-2018-4302: Gustavo Grieco

libxml2

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution

Description: A buffer overflow issue was addressed with improved memory handling.

CVE-2017-5130: an anonymous researcher

CVE-2017-7376: an anonymous researcher

libxml2

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution

Description: A memory corruption issue was addressed with improved input validation.

CVE-2017-9050: Mateusz Jurczyk (j00ru) of Google Project Zero

libxml2

Available for: OS X Mountain Lion 10.8 and later

Impact: Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution

Description: A use after free issue was addressed with improved memory management.

CVE-2017-9049: Wei Lei and Liu Yang - Nanyang Technological University in Singapore

Mail

Available for: OS X Mountain Lion 10.8 and later

Impact: The sender of an email may be able to determine the IP address of the recipient

Description: Turning off 'Load remote content in messages' did not apply to all mailboxes. This issue was addressed with improved setting propagation.

CVE-2017-7141: John Whitehead of The New York Times

Mail Drafts

Available for: OS X Mountain Lion 10.8 and later

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

Description: An encryption issue existed in the handling of mail drafts. This issue was addressed with improved handling of mail drafts meant to be sent encrypted.

CVE-2017-7078: Petter Flink, Pierre ALBARÈDE from Marseille (France), an anonymous researcher

ntp

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in ntp

Description: Multiple issues were addressed by updating to version 4.2.8p10

CVE-2017-6451: Cure53

CVE-2017-6452: Cure53

CVE-2017-6455: Cure53

CVE-2017-6458: Cure53

CVE-2017-6459: Cure53

CVE-2017-6460: Cure53

CVE-2017-6462: Cure53

CVE-2017-6463: Cure53

CVE-2017-6464: Cure53

CVE-2016-9042: Matthew Van Gundy of Cisco

Open Scripting Architecture

Available for: OS X Mountain Lion 10.8 and later

Impact: Decompiling an AppleScript with osadecompile may lead to arbitrary code execution

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

CVE-2017-13824: an anonymous researcher

PCRE

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in pcre

Description: Multiple issues were addressed by updating to version 8.40.

CVE-2017-13846

Postfix

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in Postfix

Description: Multiple issues were addressed by updating to version 3.2.2.

CVE-2017-10140: an anonymous researcher

Quick Look

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

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

CVE-2017-13822: Australian Cyber Security Centre – Australian Signals Directorate

Quick Look

Available for: OS X Mountain Lion 10.8 and later

Impact: Parsing a maliciously crafted office document may lead to an unexpected application termination or arbitrary code execution

Description: A memory consumption issue was addressed through improved memory handling.

CVE-2017-7132: Australian Cyber Security Centre – Australian Signals Directorate

QuickTime

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to read restricted memory

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

CVE-2017-13823: Xiangkun Jia of Institute of Software Chinese Academy of Sciences

Remote Management

Available for: OS X Mountain Lion 10.8 and later

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-2017-13808: an anonymous researcher

Sandbox

Available for: OS X Mountain Lion 10.8 and later

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-2017-13838: Alastair Houghton

Screen Lock

Available for: OS X Mountain Lion 10.8 and later

Impact: Application Firewall prompts may appear over Login Window

Description: A window management issue was addressed through improved state management.

CVE-2017-7082: Tim Kingman

Security

Available for: OS X Mountain Lion 10.8 and later

Impact: A revoked certificate may be trusted

Description: A certificate validation issue existed in the handling of revocation data. This issue was addressed through improved validation.

CVE-2017-7080: Sven Driemecker of adesso mobile solutions gmbh, Rune Darrud (@theflyingcorpse) of Bærum kommune, an anonymous researcher, an anonymous researcher

SMB

Available for: OS X Mountain Lion 10.8 and later

Impact: A local attacker may be able to execute non-executable text files via an SMB share

Description: An issue in handling file permissions was addressed with improved validation.

CVE-2017-13908: an anonymous researcher

Spotlight

Available for: OS X Mountain Lion 10.8 and later

Impact: Spotlight may display results for files not belonging to the user

Description: An access issue existed in Spotlight. This issue was addressed through improved access restrictions.

CVE-2017-13839: Ken Harris of the Free Robot Collective

Spotlight

Available for: OS X Mountain Lion 10.8 and later

Impact: An application may be able to access restricted files

Description: An access issue was addressed with additional sandbox restrictions on applications.

CVE-2017-13910

SQLite

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in SQLite

Description: Multiple issues were addressed by updating to version 3.19.3.

CVE-2017-10989: found by OSS-Fuzz

CVE-2017-7128: found by OSS-Fuzz

CVE-2017-7129: found by OSS-Fuzz

CVE-2017-7130: found by OSS-Fuzz

SQLite

Available for: OS X Mountain Lion 10.8 and later

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-2017-7127: an anonymous researcher

zlib

Available for: OS X Mountain Lion 10.8 and later

Impact: Multiple issues in zlib

Description: Multiple issues were addressed by updating to version 1.2.11.

CVE-2016-9840

CVE-2016-9841

CVE-2016-9842

CVE-2016-9843

Additional recognition

Mail

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

Security

We would like to acknowledge Abhinav Bansal of Zscaler, Inc. for their assistance.

NSWindow

We would like to acknowledge Trent Apted of the Google Chrome team for their assistance.

WebKit Web Inspector

We would like to acknowledge Ioan Bizău of Bloggify for their assistance.

macOS High Sierra 10.13 Supplemental Update

New downloads of macOS High Sierra 10.13 include the security content of the macOS High Sierra 10.13 Supplemental Update.