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

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Apple security documents reference vulnerabilities by CVE-ID when possible.

macOS High Sierra 10.13

Released September 25, 2017

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

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

Entry updated October 3, 2017

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.

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

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

Entry updated October 3, 2017

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

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

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 sanitization.

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

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

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

Entry updated October 3, 2017

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

Entry updated October 3, 2017

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

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

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

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.

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