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APPLE-SA-2020-1-28-2 macOS Catalina 10.15.3, Security Update
2020-001 Mojave, Security Update 2020-001 High Sierra

macOS Catalina 10.15.3, Security Update 2020-001 Mojave, and
Security Update 2020-001 High Sierra are now available and
address the following:

AnnotationKit
Available for: macOS Catalina 10.15.2
Impact: A remote attacker may be able to cause unexpected application
termination or arbitrary code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2020-3877: an anonymous researcher working with Trend Micro’s
Zero Day Initiative

apache_mod_php
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: Multiple issues in PHP
Description: Multiple issues were addressed by updating to PHP
version 7.3.11.
CVE-2019-11043

Audio
Available for: macOS Catalina 10.15.2
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-2020-3857: Zhuo Liang of Qihoo 360 Vulcan Team

autofs
Available for: macOS Catalina 10.15.2
Impact: Searching for and opening a file from an attacker controlled
NFS mount may bypass Gatekeeper
Description: This was addressed with additional checks by Gatekeeper
on files mounted through a network share.
CVE-2020-3866: Jose Castro Almeida (@HackerOn2Wheels) and René Kroka
(@rene_kroka)

CoreBluetooth
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6
Impact: A remote attacker may be able to cause unexpected application
termination or arbitrary code execution
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2020-3848: Jianjun Dai of Qihoo 360 Alpha Lab
CVE-2020-3849: Jianjun Dai of Qihoo 360 Alpha Lab
CVE-2020-3850: Jianjun Dai of Qihoo 360 Alpha Lab

CoreBluetooth
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6
Impact: A remote attacker may be able to leak memory
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2020-3847: Jianjun Dai of Qihoo 360 Alpha Lab

Crash Reporter
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: A malicious application may be able to access restricted
files
Description: A validation issue existed in the handling of symlinks.
This issue was addressed with improved validation of symlinks.
CVE-2020-3835: Csaba Fitzl (@theevilbit)

Image Processing
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: Viewing a maliciously crafted JPEG file may lead to arbitrary
code execution
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2020-3827: Samuel Groß of Google Project Zero

ImageIO
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: Processing a maliciously crafted image may lead to arbitrary
code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2020-3826: Samuel Groß of Google Project Zero
CVE-2020-3870
CVE-2020-3878: Samuel Groß of Google Project Zero

Intel Graphics Driver
Available for: macOS Mojave 10.14.6, macOS Catalina 10.15.2
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-2020-3845: Zhuo Liang of Qihoo 360 Vulcan Team

IOAcceleratorFamily
Available for: macOS Catalina 10.15.2
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-2020-3837: Brandon Azad of Google Project Zero

IPSec
Available for: macOS Catalina 10.15.2
Impact: Loading a maliciously crafted racoon configuration file may
lead to arbitrary code execution
Description: An off by one issue existed in the handling of racoon
configuration files. This issue was addressed through improved bounds
checking.
CVE-2020-3840: @littlelailo

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: An application may be able to read restricted memory
Description: A validation issue was addressed with improved input
sanitization.
CVE-2020-3875: Brandon Azad of Google Project Zero

Kernel
Available for: macOS Catalina 10.15.2
Impact: An application may be able to read restricted memory
Description: A memory initialization issue was addressed with
improved memory handling.
CVE-2020-3872: Haakon Garseg Mørk of Cognite and Cim Stordal of
Cognite

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: A malicious application may be able to execute arbitrary code
with system privileges
Description: A type confusion issue was addressed with improved
memory handling.
CVE-2020-3853: Brandon Azad of Google Project Zero

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: A malicious application may be able to determine kernel
memory layout
Description: An access issue was addressed with improved memory
management.
CVE-2020-3836: Brandon Azad of Google Project Zero

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
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-2020-3842: Ned Williamson working with Google Project Zero
CVE-2020-3871: Corellium

libxml2
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6
Impact: Processing maliciously crafted XML may lead to an unexpected
application termination or arbitrary code execution
Description: A buffer overflow was addressed with improved size
validation.
CVE-2020-3846: Ranier Vilela

libxpc
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: Processing a maliciously crafted string may lead to heap
corruption
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2020-3856: Ian Beer of Google Project Zero

libxpc
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: An application may be able to gain elevated privileges
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2020-3829: Ian Beer of Google Project Zero

PackageKit
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: A malicious application may be able to overwrite arbitrary
files
Description: A validation issue existed in the handling of symlinks.
This issue was addressed with improved validation of symlinks.
CVE-2020-3830: Csaba Fitzl (@theevilbit)

Security
Available for: macOS Catalina 10.15.2
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-2020-3854: Jakob Rieck (@0xdead10cc) and Maximilian Blochberger
of the Security in Distributed Systems Group of University of Hamburg

sudo
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: Certain configurations may allow a local attacker to execute
arbitrary code
Description: A buffer overflow issue was addressed with improved
memory handling.
CVE-2019-18634: Apple

System
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6
Impact: A malicious application may be able to overwrite arbitrary
files
Description: An access issue was addressed with improved access
restrictions.
CVE-2020-3855: Csaba Fitzl (@theevilbit)

Wi-Fi
Available for: macOS Catalina 10.15.2
Impact: An application may be able to read restricted memory
Description: A validation issue was addressed with improved input
sanitization.
CVE-2020-3839: s0ngsari of Theori and Lee of Seoul National
University working with Trend Micro’s Zero Day Initiative

Wi-Fi
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: A remote attacker may be able to cause unexpected system
termination or corrupt kernel memory
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2020-3843: Ian Beer of Google Project Zero

wifivelocityd
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.2
Impact: An application may be able to execute arbitrary code with
system privileges
Description: The issue was addressed with improved permissions logic.
CVE-2020-3838: Dayton Pidhirney (@_watbulb)

Additional recognition

Photos Storage
We would like to acknowledge Salman Husain of UC Berkeley for their
assistance.

Installation note:

macOS Catalina 10.15.3, Security Update 2020-001 Mojave, and
Security Update 2020-001 High Sierra may be obtained from the
Mac App Store or Apple’s Software Downloads web site:
https://support.apple.com/downloads/

Information will also be posted to the Apple Security Updates
web site: https://support.apple.com/kb/HT201222

This message is signed with Apple’s Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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