About the security content of macOS High Sierra 10.13.6, Security Update 2018-004 Sierra, Security Update 2018-004 El Capitan

This document describes the security content of macOS High Sierra 10.13.6, Security Update 2018-004 Sierra, Security Update 2018-004 El Capitan.

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

macOS High Sierra 10.13.6, Security Update 2018-004 Sierra, Security Update 2018-004 El Capitan

Released 9 July 2018

Accounts

Available for: macOS High Sierra 10.13.5

Impact: A malicious application may be able to access local users’ Apple IDs

Description: A privacy issue in the handling of Open Directory records was addressed with improved indexing.

CVE-2018-4470: Jacob Greenfield of Commonwealth School

Entry added 10 December 2018

AMD

Available for: macOS High Sierra 10.13.5

Impact: A malicious application may be able to determine kernel memory layout

Description: An information disclosure issue was addressed by removing the vulnerable code.

CVE-2018-4289: shrek_wzw of Qihoo 360 Nirvan Team

APFS

Available for: macOS High Sierra 10.13.5

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-2018-4268: Mac working with Trend Micro's Zero Day Initiative

ATS

Available for: macOS High Sierra 10.13.5

Impact: A malicious application may be able to gain root privileges

Description: A type confusion issue was addressed with improved memory handling.

CVE-2018-4285: Mohamed Ghannam (@_simo36)

Bluetooth

Available for: MacBook Pro (15-inch, 2018) and MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports)

Other Mac models were addressed with macOS High Sierra 10.13.5.

Impact: An attacker in a privileged network position may be able to intercept bluetooth traffic

Description: An input validation issue existed in bluetooth. This issue was addressed with improved input validation.

CVE-2018-5383: Lior Neumann and Eli Biham

Entry added 23 July 2018

CFNetwork

Available for: macOS High Sierra 10.13.5

Impact: Cookies may unexpectedly persist in Safari

Description: A cookie management issue was addressed with improved checks.

CVE-2018-4293: an anonymous researcher

CoreCrypto

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

Impact: A malicious application may be able to break out of its sandbox

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

CVE-2018-4269: Abraham Masri (@cheesecakeufo)

CUPS

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.5

Impact: An attacker in a privileged position may be able to perform a denial-of-service attack

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

CVE-2018-4276: Jakub Jirasek of Secunia Research at Flexera

Entry added 25 September 2018

DesktopServices

Available for: macOS Sierra 10.12.6

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

Description: A permissions issue existed in which execute permission was incorrectly granted. This issue was addressed with improved permission validation.

CVE-2018-4178: Arjen Hendrikse

Intel Graphics Driver

Available for: macOS High Sierra 10.13.5

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

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

CVE-2018-4456: Tyler Bohan of Cisco Talos

Entry updated 22 January 2019

IOGraphics

Available for: macOS High Sierra 10.13.5

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 with improved input validation.

CVE-2018-4283: @panicaII 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 10.13.5

Impact: Systems using Intel® Core-based microprocessors may potentially allow a local process to infer data utilising Lazy FP state restore from another process through a speculative execution side channel

Description: Lazy FP state restore instead of eager save and restore of the state upon a context switch. Lazy restored states are potentially vulnerable to exploits where one process may infer register values of other processes through a speculative execution side channel that infers their value.

An information disclosure issue was addressed with FP/SIMD register state sanitisation.

CVE-2018-3665: Julian Stecklina of Amazon Germany, Thomas Prescher of Cyberus Technology GmbH (cyberus-technology.de), Zdenek Sojka of SYSGO AG (sysgo.com) and Colin Percival

Kernel

Available for: macOS High Sierra 10.13.5

Impact: Mounting a maliciously crafted NFS network share may lead to arbitrary code execution with system privileges

Description: Multiple memory corruption issues were addressed with improved memory handling.

CVE-2018-4259: Kevin Backhouse of Semmle and LGTM.com

CVE-2018-4286: Kevin Backhouse of Semmle and LGTM.com

CVE-2018-4287: Kevin Backhouse of Semmle and LGTM.com

CVE-2018-4288: Kevin Backhouse of Semmle and LGTM.com

CVE-2018-4291: Kevin Backhouse of Semmle and LGTM.com

Entry added 30 October 2018

libxpc

Available for: OS X El Capitan 10.11.6, macOS Sierra 10.12.6, macOS High Sierra 10.13.5

Impact: An application may be able to gain elevated privileges

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

CVE-2018-4280: Brandon Azad

libxpc

Available for: macOS High Sierra 10.13.5

Impact: A malicious application may be able to read restricted memory

Description: An out-of-bounds read was addressed with improved input validation.

CVE-2018-4248: Brandon Azad

LinkPresentation

Available for: macOS High Sierra 10.13.5

Impact: Visiting a malicious website may lead to address bar spoofing

Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

CVE-2018-4277: xisigr of Tencent's Xuanwu Lab (tencent.com)

Perl

Available for: macOS High Sierra 10.13.5

Impact: Multiple buffer overflow issues existed in Perl

Description: Multiple issues in Perl were addressed with improved memory handling.

CVE-2018-6797: Brian Carpenter

CVE-2018-6913: GwanYeong Kim

Entry added 30 October 2018

Ruby

Available for: macOS High Sierra 10.13.5

Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution

Description: Multiple issues in Ruby were addressed in this update.

CVE-2017-0898

CVE-2017-10784

CVE-2017-14033

CVE-2017-14064

CVE-2017-17405

CVE-2017-17742

CVE-2018-6914

CVE-2018-8777

CVE-2018-8778

CVE-2018-8779

CVE-2018-8780

Entry added 30 October 2018

WebKit

Available for: macOS High Sierra 10.13.5

Impact: Visiting a malicious website may lead to address bar spoofing

Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

CVE-2018-4274: Tomasz Bojarski

Entry added 28 July 2020

Additional recognition

App Store

We would like to acknowledge Jesse Endahl & Stevie Hryciw of Fleetsmith, and Max Bélanger of Dropbox, for their assistance.

Entry added 8 August 2018

Help Viewer

We would like to acknowledge Wojciech Reguła (@_r3ggi) of SecuRing for their assistance with four mitigations.

Kernel

We would like to acknowledge juwei lin (@panicaII) of Trend Micro working with Trend Micro’s Zero Day Initiative for their assistance.

Security

We would like to acknowledge Brad Dahlsten of Iowa State University for their assistance.

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