About the security content of Security Update 2021-002 Catalina
This document describes the security content of Security Update 2021-002 Catalina.
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Security Update 2021-002 Catalina
APFS
Available for: macOS Catalina
Impact: A local user may be able to read arbitrary files
Description: The issue was addressed with improved permissions logic.
CVE-2021-1797: Thomas Tempelmann
Archive Utility
Available for: macOS Catalina
Impact: A malicious application may bypass Gatekeeper checks
Description: A logic issue was addressed with improved state management.
CVE-2021-1810: Rasmus Sten (@pajp) of F-Secure
Audio
Available for: macOS Catalina
Impact: An application may be able to read restricted memory
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1808: JunDong Xie of Ant Security Light-Year Lab
CFNetwork
Available for: macOS Catalina
Impact: Processing maliciously crafted web content may disclose sensitive user information
Description: A memory initialization issue was addressed with improved memory handling.
CVE-2021-1857: an anonymous researcher
CoreAudio
Available for: macOS Catalina
Impact: A malicious application may be able to read restricted memory
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1809: JunDong Xie of Ant Security Light-Year Lab
CoreAudio
Available for: macOS Catalina
Impact: An out-of-bounds read was addressed with improved input validation
Description: Processing a maliciously crafted audio file may disclose restricted memory.
CVE-2021-1846: JunDong Xie of Ant Security Light-Year Lab
CoreGraphics
Available for: macOS Catalina
Impact: Opening a maliciously crafted file may lead to unexpected application termination or arbitrary code execution
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1847: Xuwei Liu of Purdue University
CoreText
Available for: macOS Catalina
Impact: Processing a maliciously crafted font may result in the disclosure of process memory
Description: A logic issue was addressed with improved state management.
CVE-2021-1811: Xingwei Lin of Ant Security Light-Year Lab
curl
Available for: macOS Catalina
Impact: A malicious server may be able to disclose active services
Description: This issue was addressed with improved checks.
CVE-2020-8284: Marian Rehak
curl
Available for: macOS Catalina
Impact: A remote attacker may be able to cause a denial of service
Description: A buffer overflow was addressed with improved input validation.
CVE-2020-8285: xnynx
curl
Available for: macOS Catalina
Impact: An attacker may provide a fraudulent OCSP response that would appear valid
Description: This issue was addressed with improved checks.
CVE-2020-8286: an anonymous researcher
DiskArbitration
Available for: macOS Catalina
Impact: A malicious application may be able to modify protected parts of the file system
Description: A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks.
CVE-2021-1784: Mikko Kenttälä (@Turmio_) of SensorFu, Csaba Fitzl (@theevilbit) of Offensive Security, and an anonymous researcher
FontParser
Available for: macOS Catalina
Impact: Processing a maliciously crafted font file may lead to arbitrary code execution
Description: An out-of-bounds read was addressed with improved input validation.
CVE-2021-1881: Hou JingYi (@hjy79425575) of Qihoo 360, an anonymous researcher, Xingwei Lin of Ant Security Light-Year Lab, and Mickey Jin of Trend Micro
FontParser
Available for: macOS Catalina
Impact: Processing a maliciously crafted font file may lead to arbitrary code execution
Description: A logic issue was addressed with improved state management.
CVE-2020-27942: an anonymous researcher
Foundation
Available for: macOS Catalina
Impact: A malicious application may be able to gain root privileges
Description: A validation issue was addressed with improved logic.
CVE-2021-1813: Cees Elzinga
Foundation
Available for: macOS Catalina
Impact: An application may be able to gain elevated privileges
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1882: Gabe Kirkpatrick (@gabe_k)
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-2021-1843: Ye Zhang of Baidu Security
ImageIO
Available for: macOS Catalina
Impact: An out-of-bounds write issue was addressed with improved bounds checking
Description: Processing a maliciously crafted image may lead to arbitrary code execution.
CVE-2021-1858: Mickey Jin and Qi Sun of Trend Micro working with Trend Micro's Zero Day Initiative
Intel Graphics Driver
Available for: macOS Catalina
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-2021-1834: ABC Research s.r.o. working with Trend Micro Zero Day Initiative
Intel Graphics Driver
Available for: macOS Catalina
Impact: An out-of-bounds write issue was addressed with improved bounds checking
Description: A malicious application may be able to execute arbitrary code with kernel privileges.
CVE-2021-1841: Jack Dates of RET2 Systems, Inc.
Kernel
Available for: macOS Catalina
Impact: A malicious application may be able to disclose kernel memory
Description: A memory initialization issue was addressed with improved memory handling.
CVE-2021-1860: @0xalsr
Kernel
Available for: macOS Catalina
Impact: An application may be able to execute arbitrary code with kernel privileges
Description: A logic issue was addressed with improved state management.
CVE-2021-1851: @0xalsr
Kernel
Available for: macOS Catalina
Impact: A local attacker may be able to elevate their privileges
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1840: Zuozhi Fan (@pattern_F_) of Ant Group Tianqiong Security Lab
Kernel
Available for: macOS Catalina
Impact: The issue was addressed with improved permissions logic
Description: Copied files may not have the expected file permissions.
CVE-2021-1832: an anonymous researcher
libxpc
Available for: macOS Catalina
Impact: A malicious application may be able to gain root privileges
Description: A race condition was addressed with additional validation.
CVE-2021-30652: James Hutchins
libxslt
Available for: macOS Catalina
Impact: Processing a maliciously crafted file may lead to heap corruption
Description: A double free issue was addressed with improved memory management.
CVE-2021-1875: Found by OSS-Fuzz
Login Window
Available for: macOS Catalina
Impact: A malicious application with root privileges may be able to access private information
Description: This issue was addressed with improved entitlements.
CVE-2021-1824: Wojciech Reguła (@_r3ggi) of SecuRing
NSRemoteView
Available for: macOS Catalina
Impact: Processing maliciously crafted web content may lead to arbitrary code execution
Description: A use after free issue was addressed with improved memory management.
CVE-2021-1876: Matthew Denton of Google Chrome
Preferences
Available for: macOS Catalina
Impact: A local user may be able to modify protected parts of the file system
Description: A parsing issue in the handling of directory paths was addressed with improved path validation.
CVE-2021-1739: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020) of Tencent Security Xuanwu Lab (xlab.tencent.com)
CVE-2021-1740: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020) of Tencent Security Xuanwu Lab (https://xlab.tencent.com)
smbx
Available for: macOS Catalina
Impact: An attacker in a privileged network position may be able to leak sensitive user information
Description: An integer overflow was addressed with improved input validation.
CVE-2021-1878: Aleksandar Nikolic of Cisco Talos (talosintelligence.com)
System Preferences
Available for: macOS Catalina
Impact: A malicious application may bypass Gatekeeper checks. Apple is aware of a report that this issue may have been actively exploited.
Description: A logic issue was addressed with improved state management.
CVE-2021-30657: Cedric Owens (@cedowens)
Tailspin
Available for: macOS Catalina
Impact: A local attacker may be able to elevate their privileges
Description: A logic issue was addressed with improved state management.
CVE-2021-1868: Tim Michaud of Zoom Communications
tcpdump
Available for: macOS Catalina
Impact: A remote attacker may be able to cause a denial of service
Description: This issue was addressed with improved checks.
CVE-2020-8037: an anonymous researcher
Time Machine
Available for: macOS Catalina
Impact: A local attacker may be able to elevate their privileges
Description: The issue was addressed with improved permissions logic.
CVE-2021-1839: Tim Michaud(@TimGMichaud) of Zoom Video Communications and Gary Nield of ECSC Group plc
Wi-Fi
Available for: macOS Catalina
Impact: An application may be able to cause unexpected system termination or write kernel memory
Description: A memory corruption issue was addressed with improved validation.
CVE-2021-1828: Zuozhi Fan (@pattern_F_) of Ant Group Tianqiong Security Lab
Wi-Fi
Available for: macOS Catalina
Impact: The issue was addressed with improved permissions logic
Description: An application may be able to execute arbitrary code with system privileges.
CVE-2021-30655: Gary Nield of ECSC Group plc and Tim Michaud (@TimGMichaud) of Zoom Video Communications, Wojciech Reguła (@_r3ggi) of SecuRing
wifivelocityd
Available for: macOS Catalina
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)
WindowServer
Available for: macOS Catalina
Impact: A malicious application may be able to unexpectedly leak a user's credentials from secure text fields
Description: An API issue in Accessibility TCC permissions was addressed with improved state management.
CVE-2021-1873: an anonymous researcher
Additional recognition
CoreCrypto
We would like to acknowledge Andy Russon of Orange Group for their assistance.
Intel Graphics Driver
We would like to acknowledge Jack Dates of RET2 Systems, Inc. for their assistance.
Kernel
We would like to acknowledge Antonio Frighetto of Politecnico di Milano, GRIMM, Keyu Man, Zhiyun Qian, Zhongjie Wang, Xiaofeng Zheng, Youjun Huang, Haixin Duan, and an anonymous researcher for their assistance.
We would like to acknowledge Petter Flink, SecOps of Bonnier News and an anonymous researcher for their assistance.
Safari
We would like to acknowledge an anonymous researcher for their assistance.
Security
We would like to acknowledge Xingwei Lin of Ant Security Light-Year Lab and john (@nyan_satan) for their assistance.
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