About the security content of Security Update 2021-005 Catalina
This document describes the security content of Security Update 2021-005 Catalina.
About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
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Security Update 2021-005 Catalina
CoreGraphics
Available for: macOS Catalina
Impact: Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: An integer overflow was addressed with improved input validation.
CVE-2021-30860: The Citizen Lab
CoreServices
Available for: macOS Catalina
Impact: A sandboxed process may be able to circumvent sandbox restrictions
Description: An access issue was addressed with improved access restrictions.
CVE-2021-30783: an anonymous researcher, Ron Hass (@ronhass7) of Perception Point
Core Telephony
Available for: macOS Catalina
Impact: A sandboxed process may be able to circumvent sandbox restrictions. Apple was aware of a report that this issue may have been actively exploited at the time of release.
Description: A deserialization issue was addressed through improved validation.
CVE-2021-31010: Citizen Lab and Google Project Zero
CUPS
Available for: macOS Catalina
Impact: A local attacker may be able to elevate their privileges
Description: A permissions issue existed. This issue was addressed with improved permission validation.
CVE-2021-30827: Nathan Nye of WhiteBeam Security, Inc.
CUPS
Available for: macOS Catalina
Impact: A local user may be able to read arbitrary files as root
Description: This issue was addressed with improved checks.
CVE-2021-30828: Nathan Nye of WhiteBeam Security, Inc.
CUPS
Available for: macOS Catalina
Impact: A local user may be able to execute arbitrary files
Description: A URI parsing issue was addressed with improved parsing.
CVE-2021-30829: Nathan Nye of WhiteBeam Security, Inc.
curl
Available for: macOS Catalina
Impact: curl could potentially reveal sensitive internal information to the server using a clear-text network protocol
Description: A buffer overflow was addressed with improved input validation.
CVE-2021-22925: Red Hat Product Security
CVMS
Available for: macOS Catalina
Impact: A local attacker may be able to elevate their privileges
Description: A memory corruption issue was addressed with improved state management.
CVE-2021-30832: Mickey Jin (@patch1t) of Trend Micro
FontParser
Available for: macOS Catalina
Impact: Processing a maliciously crafted dfont file may lead to arbitrary code execution
Description: This issue was addressed with improved checks.
CVE-2021-30841: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-30842: Xingwei Lin of Ant Security Light-Year Lab
CVE-2021-30843: Xingwei Lin of Ant Security Light-Year Lab
ImageIO
Available for: macOS Catalina
Impact: Processing a maliciously crafted image may lead to arbitrary code execution
Description: This issue was addressed with improved checks.
CVE-2021-30835: Ye Zhang of Baidu Security
CVE-2021-30847: Mike Zhang of Pangu Lab
Kernel
Available for: macOS Catalina
Impact: A malicious application may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed with improved memory handling.
CVE-2021-30830: Zweig of Kunlun Lab
Kernel
Available for: macOS Catalina
Impact: A malicious application may be able to execute arbitrary code with kernel privileges
Description: An out-of-bounds read was addressed with improved input validation.
CVE-2021-30865: Zweig of Kunlun Lab
Kernel
Available for: macOS Catalina
Impact: Mounting a maliciously crafted NFS network share may lead to arbitrary code execution with system privileges
Description: A race condition was addressed with additional validation.
CVE-2020-29622: Jordy Zomer of Certified Secure
Kernel
Available for: macOS Catalina
Impact: A malicious application may be able to execute arbitrary code with kernel privileges
Description: A race condition was addressed with improved locking.
CVE-2021-30857: Manish Bhatt of Red Team X @Meta, Zweig of Kunlun Lab
Kernel
Available for: macOS Catalina
Impact: A malicious application may be able to execute arbitrary code with kernel privileges
Description: A type confusion issue was addressed with improved state handling.
CVE-2021-30859: Apple
libexpat
Available for: macOS Catalina
Impact: A remote attacker may be able to cause a denial of service
Description: This issue was addressed by updating expat to version 2.4.1.
CVE-2013-0340: an anonymous researcher
Preferences
Available for: macOS Catalina
Impact: An 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-2021-30855: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020) of Tencent Security Xuanwu Lab (xlab.tencent.com)
Sandbox
Available for: macOS Catalina
Impact: A user may gain access to protected parts of the file system
Description: An access issue was addressed with improved access restrictions.
CVE-2021-30850: an anonymous researcher
SMB
Available for: macOS Catalina
Impact: A remote attacker may be able to leak memory
Description: A logic issue was addressed with improved state management.
CVE-2021-30844: Peter Nguyen Vu Hoang of STAR Labs
TCC
Available for: macOS Catalina
Impact: A malicious application may be able to bypass Privacy preferences
Description: A permissions issue was addressed with improved validation.
CVE-2021-30713: an anonymous researcher
Additional recognition
Bluetooth
We would like to acknowledge say2 of ENKI for their assistance.
CoreML
We would like to acknowledge hjy79425575 working with Trend Micro Zero Day Initiative for their assistance.
CUPS
We would like to acknowledge an anonymous researcher for their assistance.
Kernel
We would like to acknowledge Anthony Steinhauser of Google's Safeside project for their assistance.
smbx
We would like to acknowledge Zhongcheng Li (CK01) for their assistance.
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