About the security content of macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra

This document describes the security content of macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra.

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macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra

Released July 15, 2020

AMD

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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-2020-9927: Lilang Wu working with TrendMicro’s Zero Day Initiative

Entry updated August 5, 2020

Audio

Available for: macOS Catalina 10.15.5

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

Description: An out-of-bounds write issue was addressed with improved bounds checking.

CVE-2020-9884: Yu Zhou(@yuzhou6666) of 小鸡帮 working with Trend Micro Zero Day Initiative

CVE-2020-9889: Anonymous working with Trend Micro’s Zero Day Initiative, JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

Entry updated August 5, 2020

Audio

Available for: macOS Catalina 10.15.5

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-2020-9888: JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9890: JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9891: JunDong Xie and XingWei Lin of Ant-Financial Light-Year Security Lab

Entry updated August 5, 2020

Bluetooth

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

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

CVE-2020-9928: Yu Wang of Didi Research America

Entry added August 5, 2020

Bluetooth

Available for: macOS Mojave 10.14.6, macOS Catalina 10.15.5

Impact: A local user may be able to cause unexpected system termination or read kernel memory

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

CVE-2020-9929: Yu Wang of Didi Research America

Entry added August 5, 2020

Clang

Available for: macOS Catalina 10.15.5

Impact: Clang may generate machine code that does not correctly enforce pointer authentication codes

Description: A logic issue was addressed with improved validation.

CVE-2020-9870: Samuel Groß of Google Project Zero

CoreAudio

Available for: macOS High Sierra 10.13.6

Impact: A buffer overflow may result in arbitrary code execution

Description: A buffer overflow was addressed with improved bounds checking.

CVE-2020-9866: Yu Zhou of 小鸡帮 and Jundong Xie of Ant-Financial Light-Year Security Lab

Core Bluetooth

Available for: macOS Catalina 10.15.5

Impact: A remote attacker may cause an unexpected application termination

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

CVE-2020-9869: Patrick Wardle of Jamf

Entry added August 5, 2020

CoreCapture

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6

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-2020-9949: Proteas

Entry added November 12, 2020

CoreFoundation

Available for: macOS Catalina 10.15.5

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

Description: An issue existed in the handling of environment variables. This issue was addressed with improved validation.

CVE-2020-9934: Matt Shockley (linkedin.com/in/shocktop)

Entry updated August 5, 2020

CoreGraphics

Available for: macOS Catalina 10.15.5

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

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

CVE-2020-9883: an anonymous researcher, Mickey Jin of Trend Micro

Entry added July 24, 2020, updated November 12, 2020

Crash Reporter

Available for: macOS Catalina 10.15.5

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

Description: A memory corruption issue was addressed by removing the vulnerable code.

CVE-2020-9865: Zhuo Liang of Qihoo 360 Vulcan Team working with 360 BugCloud

Crash Reporter

Available for: macOS Catalina 10.15.5

Impact: A local attacker may be able to elevate their privileges

Description: An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization.

CVE-2020-9900: Cees Elzinga, Zhongcheng Li (CK01) from Zero-dayits Team of Legendsec at Qi'anxin Group

Entry added August 5, 2020, updated December 17, 2021

FontParser

Available for: macOS Catalina 10.15.5

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

Description: An out-of-bounds write issue was addressed with improved bounds checking.

CVE-2020-9980: Xingwei Lin of Ant Security Light-Year Lab

Entry added September 21, 2020, updated October 19, 2020

Graphics Drivers

Available for: macOS Catalina 10.15.5

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

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

CVE-2020-9799: ABC Research s.r.o.

Entry updated July 24, 2020

Heimdal

Available for: macOS Catalina 10.15.5

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

Description: This issue was addressed with improved data protection.

CVE-2020-9913: Cody Thomas of SpecterOps

ImageIO

Available for: macOS Catalina 10.15.5

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

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

CVE-2020-27933: Xingwei Lin of Ant-Financial Light-Year Security Lab

Entry added March 16, 2021

ImageIO

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

Impact: Multiple buffer overflow issues existed in openEXR

Description: Multiple issues in openEXR were addressed with improved checks.

CVE-2020-11758: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11759: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11760: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11761: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11762: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11763: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11764: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-11765: Xingwei Lin of Ant-Financial Light-Year Security Lab

Entry added September 8, 2020

ImageIO

Available for: macOS Catalina 10.15.5

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-2020-9871: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9872: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9874: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9879: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9936: Mickey Jin of Trend Micro

CVE-2020-9937: Xingwei Lin of Ant-Financial Light-Year Security Lab

Entry updated August 5, 2020

ImageIO

Available for: macOS Catalina 10.15.5

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

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

CVE-2020-9919: Mickey Jin of Trend Micro

Entry added July 24, 2020

ImageIO

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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-2020-9876: Mickey Jin of Trend Micro

Entry added July 24, 2020

ImageIO

Available for: macOS Catalina 10.15.5

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-2020-9873: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9938: Xingwei Lin of Ant-Financial Light-Year Security Lab

Entry added July 24, 2020

ImageIO

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

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

CVE-2020-9877: Xingwei Lin of Ant-Financial Light-Year Security Lab

Entry added August 5, 2020

ImageIO

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

Description: An integer overflow was addressed through improved input validation.

CVE-2020-9875: Mickey Jin of Trend Micro

Entry added August 5, 2020

ImageIO

Available for: macOS Mojave 10.14.6, macOS Catalina 10.15.5

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-2020-9873: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9938: Xingwei Lin of Ant-Financial Light-Year Security Lab

CVE-2020-9984: an anonymous researcher

Entry added September 21, 2020

Image Processing

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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-2020-9887: Mickey Jin of Trend Micro

Entry added September 8, 2020

Intel Graphics Driver

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

Impact: A local user may be able to cause unexpected system termination or read kernel memory

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

CVE-2020-9908: Junzhi Lu(@pwn0rz) working with Trend Micro’s Zero Day Initiative

Entry added July 24, 2020, updated August 31, 2020

Intel Graphics Driver

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

Description: A race condition was addressed with additional validation.

CVE-2020-9990: ABC Research s.r.l. working with Trend Micro Zero Day Initiative, ABC Research s.r.o. working with Trend Micro Zero Day Initiative

Entry added September 21, 2020

Intel Graphics Driver

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

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

CVE-2020-9921: ABC Research s.r.o. working with Trend Micro Zero Day Initiative

Entry added August 5, 2020

Kernel

Available for: macOS Catalina 10.15.5

Impact: An attacker in a privileged network position may be able to inject into active connections within a VPN tunnel

Description: A routing issue was addressed with improved restrictions.

CVE-2019-14899: William J. Tolley, Beau Kujath, and Jedidiah R. Crandall

Kernel

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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-2020-9904: Tielei Wang of Pangu Lab

Entry added July 24, 2020

Kernel

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

Description: A logic issue was addressed with improved state management.

CVE-2020-9924: Matt DeVore of Google

Entry added July 24, 2020

Kernel

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

Description: Multiple memory corruption issues were addressed with improved state management.

CVE-2020-9892: Andy Nguyen of Google

Entry added July 24, 2020

Kernel

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

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

CVE-2020-9863: Xinru Chi of Pangu Lab

Entry updated August 5, 2020

Kernel

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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-2020-9902: Xinru Chi and Tielei Wang of Pangu Lab

Entry added August 5, 2020

Kernel

Available for: macOS Catalina 10.15.5

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

Description: A buffer overflow was addressed with improved bounds checking.

CVE-2020-9905: Raz Mashat (@RazMashat) of ZecOps

Entry added August 5, 2020

Kernel

Available for: macOS Catalina 10.15.5

Impact: A malicious application may disclose restricted memory

Description: An information disclosure issue was addressed with improved state management.

CVE-2020-9997: Catalin Valeriu Lita of SecurityScorecard

Entry added September 21, 2020

libxml2

Available for: macOS Catalina 10.15.5

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-2020-9926: Found by OSS-Fuzz

Entry added March 16, 2021

libxpc

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6

Impact: A malicious application may be able to overwrite arbitrary files

Description: A path handling issue was addressed with improved validation.

CVE-2020-9994: Apple

Entry added September 21, 2020

Login Window

Available for: macOS Catalina 10.15.5

Impact: A user may be unexpectedly logged in to another user’s account

Description: A logic issue was addressed with improved state management.

CVE-2020-9935: an anonymous researcher

Entry added September 21, 2020

Mail

Available for: macOS Catalina 10.15.5

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

Description: An out-of-bounds write issue was addressed with improved bounds checking.

CVE-2019-19906

Entry added July 24, 2020, updated September 8, 2020

Mail

Available for: macOS Catalina 10.15.5

Impact: A malicious mail server may overwrite arbitrary mail files

Description: A path handling issue was addressed with improved validation.

CVE-2020-9920: YongYue Wang AKA BigChan of Hillstone Networks AF Team

Entry added July 24, 2020

Mail

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

Impact: Processing a maliciously crafted email may lead to writing arbitrary files

Description: A logic issue was addressed with improved state management.

CVE-2020-9922: Mikko Kenttälä (@Turmio_) of SensorFu

Entry added November 12, 2020

Messages

Available for: macOS Catalina 10.15.5

Impact: A user that is removed from an iMessage group could rejoin the group

Description: An issue existed in the handling of iMessage tapbacks. The issue was resolved with additional verification.

CVE-2020-9885: an anonymous researcher, Suryansh Mansharamani, of WWP High School North (medium.com/@suryanshmansha)

Model I/O

Available for: macOS Catalina 10.15.5

Impact: Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution

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

CVE-2020-9878: Holger Fuhrmannek of Deutsche Telekom Security

Model I/O

Available for: macOS Mojave 10.14.6, macOS Catalina 10.15.5

Impact: Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution

Description: A buffer overflow was addressed with improved bounds checking.

CVE-2020-9880: Holger Fuhrmannek of Deutsche Telekom Security

Entry added July 24, 2020, updated September 21, 2020

Model I/O

Available for: macOS Mojave 10.14.6, macOS Catalina 10.15.5

Impact: Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution

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

CVE-2020-9878: Aleksandar Nikolic of Cisco Talos, Holger Fuhrmannek of Deutsche Telekom Security

CVE-2020-9881: Holger Fuhrmannek of Deutsche Telekom Security

CVE-2020-9882: Holger Fuhrmannek of Deutsche Telekom Security

CVE-2020-9940: Holger Fuhrmannek of Deutsche Telekom Security

CVE-2020-9985: Holger Fuhrmannek of Deutsche Telekom Security

Entry added July 24, 2020, updated September 21, 2020

OpenLDAP

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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

Description: This issue was addressed with improved checks.

CVE-2020-12243

Entry added September 21, 2020

Perl

Available for: macOS Catalina 10.15.5

Impact: An integer overflow in the Perl regular expression compiler may allow a remote attacker to insert instructions into the compiled form of a regular expression

Description: This issue was addressed with improved checks.

CVE-2020-10878: Hugo van der Sanden and Slaven Rezic

Entry added March 16, 2021

Perl

Available for: macOS Catalina 10.15.5

Impact: A remote attacker may be able to cause arbitrary code execution

Description: This issue was addressed with improved checks.

CVE-2020-12723: Sergey Aleynikov

Entry added March 16, 2021

rsync

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6

Impact: A remote attacker may be able to overwrite existing files

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

CVE-2014-9512: gaojianfeng

Entry added July 24, 2020

Sandbox

Available for: macOS Mojave 10.14.6, macOS Catalina 10.15.5

Impact: A local user may be able to cause unexpected system termination or read kernel memory

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

CVE-2020-9930: Zhiyi Zhang from Codesafe Team of Legendsec at Qi'anxin Group

Entry added December 15, 2020

Sandbox

Available for: macOS Catalina 10.15.5

Impact: A local user may be able to load unsigned kernel extensions

Description: This issue was addressed with improved checks.

CVE-2020-9939: @jinmo123, @setuid0x0_, and @insu_yun_en of @SSLab_Gatech working with Trend Micro’s Zero Day Initiative

Entry added August 5, 2020

Security

Available for: macOS Catalina 10.15.5

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

Description: A logic issue was addressed with improved restrictions.

CVE-2020-9864: Alexander Holodny

Security

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

Impact: An attacker may have been able to impersonate a trusted website using shared key material for an administrator added certificate

Description: A certificate validation issue existed when processing administrator added certificates. This issue was addressed with improved certificate validation.

CVE-2020-9868: Brian Wolff of Asana

Entry added July 24, 2020

Security

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6

Impact: An application may be able to gain elevated privileges

Description: A logic issue was addressed with improved validation.

CVE-2020-9854: Ilias Morad (A2nkF)

Entry added July 24, 2020

sysdiagnose

Available for: macOS Catalina 10.15.5

Impact: A local attacker may be able to elevate their privileges

Description: An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization.

CVE-2020-9901: Tim Michaud (@TimGMichaud) of Leviathan, Zhongcheng Li (CK01) from Zero-dayits Team of Legendsec at Qi'anxin Group

Entry added August 5, 2020, updated August 31, 2020

Vim

Available for: macOS High Sierra 10.13.6, macOS Mojave 10.14.6

Impact: A remote attacker may be able to cause arbitrary code execution

Description: This issue was addressed with improved checks.

CVE-2019-20807: Guilherme de Almeida Suckevicz

WebDAV

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

Impact: A sandboxed process may be able to circumvent sandbox restrictions

Description: This issue was addressed with improved entitlements.

CVE-2020-9898: Sreejith Krishnan R (@skr0x1C0)

Entry added September 8, 2020

Wi-Fi

Available for: macOS Catalina 10.15.5

Impact: A remote attacker may be able to cause unexpected system termination or corrupt kernel memory

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

CVE-2020-9918: Jianjun Dai of 360 Alpha Lab working with 360 BugCloud (bugcloud.360.cn)

Wi-Fi

Available for: macOS Mojave 10.14.6, macOS High Sierra 10.13.6, macOS Catalina 10.15.5

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-2020-9899: Yu Wang of Didi Research America

Entry added July 24, 2020

Wi-Fi

Available for: macOS Catalina 10.15.5

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-2020-9906: Ian Beer of Google Project Zero

Entry added July 24, 2020

Additional recognition

CoreFoundation

We would like to acknowledge Bobby Pelletier for their assistance.

Entry added September 8, 2020

ImageIO

We would like to acknowledge Xingwei Lin of Ant-Financial Light-Year Security Lab for their assistance.

Entry added September 21, 2020

Siri

We would like to acknowledge Yuval Ron, Amichai Shulman, and Eli Biham of the Technion - Israel Institute of Technology for their assistance.

Entry added August 5, 2020

USB Audio

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

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