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APPLE-SA-2020-05-26-3 macOS Catalina 10.15.5, Security Update
2020-003 Mojave, Security Update 2020-003 High Sierra

macOS Catalina 10.15.5, Security Update 2020-003 Mojave, Security
Update 2020-003 High Sierra are now available and address the
following:

Accounts
Available for: macOS Catalina 10.15.4
Impact: A remote attacker may be able to cause a denial of service
Description: A denial of service issue was addressed with improved
input validation.
CVE-2020-9827: Jannik Lorenz of SEEMOO @ TU Darmstadt

AirDrop
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A remote attacker may be able to cause a denial of service
Description: A denial of service issue was addressed with improved
input validation.
CVE-2020-9826: Dor Hadad of Palo Alto Networks

AppleMobileFileIntegrity
Available for: macOS High Sierra 10.13.6, macOS Catalina 10.15.4
Impact: An application may be able to use arbitrary entitlements
Description: This issue was addressed with improved checks.
CVE-2020-9842: Linus Henze (pinauten.de)

AppleUSBNetworking
Available for: macOS Catalina 10.15.4
Impact: Inserting a USB device that sends invalid messages may cause
a kernel panic
Description: A logic issue was addressed with improved restrictions.
CVE-2020-9804: Andy Davis of NCC Group

Audio
Available for: macOS Catalina 10.15.4
Impact: Processing a maliciously crafted audio file may lead to
arbitrary code execution
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2020-9815: Yu Zhou (@yuzhou6666) working with Trend Micro Zero
Day Initiative

Audio
Available for: macOS Catalina 10.15.4
Impact: Processing a maliciously crafted audio file may lead to
arbitrary code execution
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2020-9791: Yu Zhou (@yuzhou6666) working with Trend Micro Zero
Day Initiative

Bluetooth
Available for: macOS Catalina 10.15.4
Impact: A malicious application may be able to determine kernel
memory layout
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2020-9831: Yu Wang of Didi Research America

Calendar
Available for: macOS Catalina 10.15.4
Impact: Importing a maliciously crafted calendar invitation may
exfiltrate user information
Description: This issue was addressed with improved checks.
CVE-2020-3882: Andy Grant of NCC Group

CVMS
Available for: macOS Catalina 10.15.4
Impact: An application may be able to gain elevated privileges
Description: This issue was addressed with improved checks.
CVE-2020-9856: @jinmo123, @setuid0x0_, and @insu_yun_en of
@SSLab_Gatech working with Trend Micro’s Zero Day Initiative

DiskArbitration
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to break out of its
sandbox
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2020-9847: Zhuo Liang of Qihoo 360 Vulcan Team

Find My
Available for: macOS Catalina 10.15.4
Impact: A local attacker may be able to elevate their privileges
Description: A validation issue existed in the handling of symlinks.
This issue was addressed with improved validation of symlinks.
CVE-2020-9855: Zhongcheng Li(CK01) of Topsec Alpha Team

FontParser
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: Opening a maliciously crafted PDF file may lead to an
unexpected application termination or arbitrary code execution
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2020-9816: Peter Nguyen Vu Hoang of STAR Labs working with Trend
Micro Zero Day Initiative

ImageIO
Available for: macOS Catalina 10.15.4
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-2020-3878: Samuel Groß of Google Project Zero

ImageIO
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: Processing a maliciously crafted image may lead to arbitrary
code execution
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2020-9789: Wenchao Li of VARAS@IIE
CVE-2020-9790: Xingwei Lin of Ant-financial Light-Year Security Lab

Intel Graphics Driver
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: An out-of-bounds write issue was addressed with improved
bounds checking.
CVE-2020-9822: ABC Research s.r.o

IPSec
Available for: macOS High Sierra 10.13.6, macOS Catalina 10.15.4
Impact: A remote attacker may be able to leak memory
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2020-9837: Thijs Alkemade of Computest

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: A memory corruption issue was addressed with improved
state management.
CVE-2020-9821: Xinru Chi and Tielei Wang of Pangu Lab

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to determine another
application’s memory layout
Description: An information disclosure issue was addressed by
removing the vulnerable code.
CVE-2020-9797: an anonymous researcher

Kernel
Available for: macOS Catalina 10.15.4
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: An integer overflow was addressed through improved input
validation.
CVE-2020-9852: Tao Huang and Tielei Wang of Pangu Lab

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A use after free issue was addressed with improved
memory management.
CVE-2020-9795: Zhuo Liang of Qihoo 360 Vulcan Team

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: An application may be able to cause unexpected system
termination or write kernel memory
Description: A memory corruption issue was addressed with improved
state management.
CVE-2020-9808: Xinru Chi and Tielei Wang of Pangu Lab

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A local user may be able to read kernel memory
Description: An information disclosure issue was addressed with
improved state management.
CVE-2020-9811: Tielei Wang of Pangu Lab
CVE-2020-9812: Derrek (@derrekr6)

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to execute arbitrary code
with kernel privileges
Description: A logic issue existed resulting in memory corruption.
This was addressed with improved state management.
CVE-2020-9813: Xinru Chi of Pangu Lab
CVE-2020-9814: Xinru Chi and Tielei Wang of Pangu Lab

Kernel
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to determine kernel
memory layout
Description: An information disclosure issue was addressed with
improved state management.
CVE-2020-9809: Benjamin Randazzo (@____benjamin)

ksh
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A local user may be able to execute arbitrary shell commands
Description: An issue existed in the handling of environment
variables. This issue was addressed with improved validation.
CVE-2019-14868

NSURL
Available for: macOS Mojave 10.14.6
Impact: A malicious website may be able to exfiltrate autofilled data
in Safari
Description: An issue existed in the parsing of URLs. This issue was
addressed with improved input validation.
CVE-2020-9857: Dlive of Tencent Security Xuanwu Lab

PackageKit
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to gain root privileges
Description: A permissions issue existed. This issue was addressed
with improved permission validation.
CVE-2020-9817: Andy Grant of NCC Group

PackageKit
Available for: macOS Catalina 10.15.4
Impact: A malicious application may be able to modify protected parts
of the file system
Description: An access issue was addressed with improved access
restrictions.
CVE-2020-9851: Linus Henze (pinauten.de)

Python
Available for: macOS Catalina 10.15.4
Impact: A remote attacker may be able to cause arbitrary code
execution
Description: A memory corruption issue was addressed with improved
input validation.
CVE-2020-9793

Sandbox
Available for: macOS Catalina 10.15.4
Impact: A malicious application may be able to bypass Privacy
preferences
Description: An access issue was addressed with additional sandbox
restrictions.
CVE-2020-9825: Sreejith Krishnan R (@skr0x1C0)

Security
Available for: macOS Catalina 10.15.4
Impact: A file may be incorrectly rendered to execute JavaScript
Description: A validation issue was addressed with improved input
sanitization.
CVE-2020-9788: Wojciech Reguła of SecuRing
(https://wojciechregula.blog)

SIP
Available for: macOS Catalina 10.15.4
Impact: A non-privileged user may be able to modify restricted
network settings
Description: A logic issue was addressed with improved restrictions.
CVE-2020-9824: Csaba Fitzl (@theevilbit) of Offensive Security

SQLite
Available for: macOS Catalina 10.15.4
Impact: A malicious application may cause a denial of service or
potentially disclose memory contents
Description: An out-of-bounds read was addressed with improved bounds
checking.
CVE-2020-9794

System Preferences
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: An application may be able to gain elevated privileges
Description: A race condition was addressed with improved state
handling.
CVE-2020-9839: @jinmo123, @setuid0x0_, and @insu_yun_en of
@SSLab_Gatech working with Trend Micro’s Zero Day Initiative

USB Audio
Available for: macOS Catalina 10.15.4
Impact: A USB device may be able to cause a denial of service
Description: A validation issue was addressed with improved input
sanitization.
CVE-2020-9792: Andy Davis of NCC Group

Wi-Fi
Available for: macOS Catalina 10.15.4
Impact: A remote attacker may be able to cause unexpected system
termination or corrupt kernel memory
Description: A double free issue was addressed with improved memory
management.
CVE-2020-9844: Ian Beer of Google Project Zero

Wi-Fi
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: A memory corruption issue was addressed with improved
state management.
CVE-2020-9830: Tielei Wang of Pangu Lab

Wi-Fi
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
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-2020-9834: Yu Wang of Didi Research America

Wi-Fi
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A local user may be able to read kernel memory
Description: A memory initialization issue was addressed with
improved memory handling.
CVE-2020-9833: Yu Wang of Didi Research America

Wi-Fi
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A malicious application may be able to determine kernel
memory layout
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2020-9832: Yu Wang of Didi Research America

WindowServer
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: An application may be able to execute arbitrary code with
kernel privileges
Description: An integer overflow was addressed through improved input
validation.
CVE-2020-9841: ABC Research s.r.o. working with Trend Micro Zero Day
Initiative

zsh
Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6, macOS
Catalina 10.15.4
Impact: A local attacker may be able to elevate their privileges
Description: An authorization issue was addressed with improved state
management.
CVE-2019-20044: Sam Foxman

Additional recognition

CoreBluetooth
We would like to acknowledge Maximilian von Tschitschnitz of
Technical University Munich and Ludwig Peuckert of Technical
University Munich for their assistance.

CoreText
We would like to acknowledge Jiska Classen (@naehrdine) and Dennis
Heinze (@ttdennis) of Secure Mobile Networking Lab for their
assistance.

Endpoint Security
We would like to acknowledge an anonymous researcher for their
assistance.

ImageIO
We would like to acknowledge Lei Sun for their assistance.

IOHIDFamily
We would like to acknowledge Andy Davis of NCC Group for their
assistance.

IPSec
We would like to acknowledge Thijs Alkemade of Computest for their
assistance.

Login Window
We would like to acknowledge Jon Morby and an anonymous researcher
for their assistance.

Sandbox
We would like to acknowledge Jason L Lang of Optum for their
assistance.

Spotlight
We would like to acknowledge Csaba Fitzl (@theevilbit) of Offensive
Security for their assistance.

Installation note:

macOS Catalina 10.15.5, Security Update 2020-003 Mojave, Security
Update 2020-003 High Sierra may be obtained from the Mac App Store or
Apple’s Software Downloads web site:
https://support.apple.com/downloads/
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