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About the security content of macOS Big Sur 11.4

Description

# About the security content of macOS Big Sur 11.4 This document describes the security content of macOS Big Sur 11.4. ## 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](<https://support.apple.com/kb/HT201222>) page. Apple security documents reference vulnerabilities by [CVE-ID](<http://cve.mitre.org/about/>) when possible. For more information about security, see the [Apple Product Security](<https://support.apple.com/kb/HT201220>) page. ## macOS Big Sur 11.4 Released May 24, 2021 **AMD** Available for: macOS Big Sur Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution Description: A logic issue was addressed with improved state management. CVE-2021-30678: Yu Wang of Didi Research America **AMD** Available for: macOS Big Sur Impact: A local user may be able to cause unexpected system termination or read kernel memory Description: A logic issue was addressed with improved state management. CVE-2021-30676: shrek_wzw **App Store** Available for: macOS Big Sur Impact: A malicious application may be able to break out of its sandbox Description: A path handling issue was addressed with improved validation. CVE-2021-30688: Thijs Alkemade of Computest Research Division **AppleScript** Available for: macOS Big Sur Impact: A malicious application may bypass Gatekeeper checks Description: A logic issue was addressed with improved state management. CVE-2021-30669: Yair Hoffman **Audio** Available for: macOS Big Sur Impact: Processing a maliciously crafted audio file may lead to arbitrary code execution Description: This issue was addressed with improved checks. CVE-2021-30707: hjy79425575 working with Trend Micro Zero Day Initiative **Audio** Available for: macOS Big Sur Impact: Parsing a maliciously crafted audio file may lead to disclosure of user information Description: This issue was addressed with improved checks. CVE-2021-30685: Mickey Jin (@patch1t) of Trend Micro **Bluetooth** Available for: macOS Big Sur Impact: A memory corruption issue was addressed with improved state management Description: A malicious application may be able to gain root privileges CVE-2021-30672: say2 of ENKI Entry added July 21, 2021 **Core Services** Available for: macOS Big Sur Impact: A malicious application may be able to gain root privileges Description: A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. CVE-2021-30681: Zhongcheng Li (CK01) **CoreAudio** Available for: macOS Big Sur Impact: Processing a maliciously crafted audio file may disclose restricted memory Description: An out-of-bounds read was addressed with improved bounds checking. CVE-2021-30686: Mickey Jin of Trend Micro **CoreText** Available for: macOS Big Sur Impact: An out-of-bounds read was addressed with improved input validation Description: Processing a maliciously crafted font may result in the disclosure of process memory. CVE-2021-30733: Sunglin from the Knownsec 404 CVE-2021-30753: Xingwei Lin of Ant Security Light-Year Lab Entry added July 21, 2021 **Crash Reporter** Available for: macOS Big Sur Impact: A malicious application may be able to modify protected parts of the file system Description: A logic issue was addressed with improved state management. CVE-2021-30727: Cees Elzinga **CVMS** Available for: macOS Big Sur Impact: A local attacker may be able to elevate their privileges Description: This issue was addressed with improved checks. CVE-2021-30724: Mickey Jin (@patch1t) of Trend Micro **Dock** Available for: macOS Big Sur Impact: A malicious application may be able to access a user's call history Description: An access issue was addressed with improved access restrictions. CVE-2021-30673: Josh Parnham (@joshparnham) **FontParser** Available for: macOS Big Sur Impact: Processing a maliciously crafted font file may lead to arbitrary code execution Description: An out-of-bounds write was addressed with improved input validation. CVE-2021-30771: Mickey Jin (@patch1t) of Trend Micro, CFF of Topsec Alpha Team Entry added January 19, 2022 **FontParser** Available for: macOS Big Sur Impact: An out-of-bounds read was addressed with improved input validation Description: Processing a maliciously crafted font may result in the disclosure of process memory CVE-2021-30755: Xingwei Lin of Ant Security Light-Year Lab Entry added July 21, 2021 **Graphics Drivers** Available for: macOS Big Sur Impact: A remote attacker may cause an unexpected application termination or arbitrary code execution Description: A logic issue was addressed with improved state management. CVE-2021-30684: Liu Long of Ant Security Light-Year Lab **Graphics Drivers** Available for: macOS Big Sur 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-2021-30735: Jack Dates of RET2 Systems, Inc. (@ret2systems) working with Trend Micro Zero Day Initiative **Heimdal** Available for: macOS Big Sur Impact: A local user may be able to leak sensitive user information Description: A logic issue was addressed with improved state management. CVE-2021-30697: Gabe Kirkpatrick (@gabe_k) **Heimdal** Available for: macOS Big Sur Impact: A malicious application may cause a denial of service or potentially disclose memory contents Description: A memory corruption issue was addressed with improved state management. CVE-2021-30710: Gabe Kirkpatrick (@gabe_k) **Heimdal** Available for: macOS Big Sur Impact: A malicious application could execute arbitrary code leading to compromise of user information Description: A use after free issue was addressed with improved memory management. CVE-2021-30683: Gabe Kirkpatrick (@gabe_k) **ImageIO** Available for: macOS Big Sur Impact: Processing a maliciously crafted image may lead to disclosure of user information Description: An out-of-bounds read was addressed with improved bounds checking. CVE-2021-30687: Hou JingYi (@hjy79425575) of Qihoo 360 **ImageIO** Available for: macOS Big Sur Impact: Processing a maliciously crafted image may lead to disclosure of user information Description: This issue was addressed with improved checks. CVE-2021-30700: Ye Zhang(@co0py_Cat) of Baidu Security **ImageIO** Available for: macOS Big Sur Impact: Processing a maliciously crafted image may lead to arbitrary code execution Description: This issue was addressed with improved checks. CVE-2021-30701: Mickey Jin (@patch1t) of Trend Micro and Ye Zhang of Baidu Security **ImageIO** Available for: macOS Big Sur Impact: Processing a maliciously crafted ASTC file may disclose memory contents Description: This issue was addressed with improved checks. CVE-2021-30705: Ye Zhang of Baidu Security **ImageIO** Available for: macOS Big Sur Impact: This issue was addressed with improved checks Description: Processing a maliciously crafted image may lead to disclosure of user information. CVE-2021-30706: Anonymous working with Trend Micro Zero Day Initiative, Jzhu working with Trend Micro Zero Day Initiative Entry added July 21, 2021 **Intel Graphics Driver** Available for: macOS Big Sur Impact: A local user may be able to cause unexpected system termination or read kernel memory Description: An out-of-bounds read issue was addressed by removing the vulnerable code. CVE-2021-30719: an anonymous researcher working with Trend Micro Zero Day Initiative **Intel Graphics Driver** Available for: macOS Big Sur 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-2021-30728: Liu Long of Ant Security Light-Year Lab CVE-2021-30726: Yinyi Wu(@3ndy1) of Qihoo 360 Vulcan Team **IOUSBHostFamily** Available for: macOS Big Sur Impact: This issue was addressed with improved checks Description: An unprivileged application may be able to capture USB devices. CVE-2021-30731: UTM (@UTMapp) Entry added July 21, 2021 **Kernel** Available for: macOS Big Sur Impact: A malicious application may be able to execute arbitrary code with kernel privileges Description: A logic issue was addressed with improved validation. CVE-2021-30740: Linus Henze (pinauten.de) **Kernel** Available for: macOS Big Sur Impact: An application may be able to execute arbitrary code with kernel privileges Description: A logic issue was addressed with improved state management. CVE-2021-30704: an anonymous researcher **Kernel** Available for: macOS Big Sur Impact: Processing a maliciously crafted message may lead to a denial of service Description: A logic issue was addressed with improved state management. CVE-2021-30715: The UK's National Cyber Security Centre (NCSC) **Kernel** Available for: macOS Big Sur Impact: An application may be able to execute arbitrary code with kernel privileges Description: A buffer overflow was addressed with improved size validation. CVE-2021-30736: Ian Beer of Google Project Zero **Kernel** Available for: macOS Big Sur Impact: A local attacker may be able to elevate their privileges Description: A memory corruption issue was addressed with improved validation. CVE-2021-30739: Zuozhi Fan (@pattern_F_) of Ant Group Tianqiong Security Lab **Kernel** Available for: macOS Big Sur Impact: A double free issue was addressed with improved memory management Description: An application may be able to execute arbitrary code with kernel privileges. CVE-2021-30703: an anonymous researcher Entry added July 21, 2021 **Kext Management** Available for: macOS Big Sur Impact: A local user may be able to load unsigned kernel extensions Description: A logic issue was addressed with improved state management. CVE-2021-30680: Csaba Fitzl (@theevilbit) of Offensive Security **LaunchServices** Available for: macOS Big Sur Impact: A malicious application may be able to break out of its sandbox Description: This issue was addressed with improved environment sanitization. CVE-2021-30677: Ron Waisberg (@epsilan) **Login Window** Available for: macOS Big Sur Impact: A person with physical access to a Mac may be able to bypass Login Window Description: A logic issue was addressed with improved state management. CVE-2021-30702: Jewel Lambert of Original Spin, LLC. **Mail** Available for: macOS Big Sur Impact: An attacker in a privileged network position may be able to misrepresent application state Description: A logic issue was addressed with improved state management. CVE-2021-30696: Fabian Ising and Damian Poddebniak of Münster University of Applied Sciences **MediaRemote** Available for: macOS Big Sur Impact: A privacy issue in Now Playing was addressed with improved permissions Description: A local attacker may be able to view Now Playing information from the lock screen. CVE-2021-30756: Ricky D'Amelio, Jatayu Holznagel (@jholznagel) Entry added July 21, 2021 **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted USD file may disclose memory contents Description: An information disclosure issue was addressed with improved state management. CVE-2021-30723: Mickey Jin (@patch1t) of Trend Micro CVE-2021-30691: Mickey Jin (@patch1t) of Trend Micro CVE-2021-30692: Mickey Jin (@patch1t) of Trend Micro CVE-2021-30694: Mickey Jin (@patch1t) of Trend Micro **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution Description: A memory corruption issue was addressed with improved state management. CVE-2021-30725: Mickey Jin (@patch1t) of Trend Micro **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted USD file may disclose memory contents Description: An out-of-bounds read was addressed with improved input validation. CVE-2021-30746: Mickey Jin (@patch1t) of Trend Micro **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted image may lead to arbitrary code execution Description: A validation issue was addressed with improved logic. CVE-2021-30693: Mickey Jin (@patch1t) & Junzhi Lu (@pwn0rz) of Trend Micro **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted USD file may disclose memory contents Description: An out-of-bounds read was addressed with improved bounds checking. CVE-2021-30695: Mickey Jin (@patch1t) & Junzhi Lu (@pwn0rz) of Trend Micro **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted USD file may lead to unexpected application termination or arbitrary code execution Description: An out-of-bounds read was addressed with improved input validation. CVE-2021-30708: Mickey Jin (@patch1t) & Junzhi Lu (@pwn0rz) of Trend Micro **Model I/O** Available for: macOS Big Sur Impact: Processing a maliciously crafted USD file may disclose memory contents Description: This issue was addressed with improved checks. CVE-2021-30709: Mickey Jin (@patch1t) of Trend Micro **NSOpenPanel** Available for: macOS Big Sur Impact: An application may be able to gain elevated privileges Description: This issue was addressed by removing the vulnerable code. CVE-2021-30679: Gabe Kirkpatrick (@gabe_k) **OpenLDAP** Available for: macOS Big Sur Impact: A remote attacker may be able to cause a denial of service Description: This issue was addressed with improved checks. CVE-2020-36226 CVE-2020-36227 CVE-2020-36223 CVE-2020-36224 CVE-2020-36225 CVE-2020-36221 CVE-2020-36228 CVE-2020-36222 CVE-2020-36230 CVE-2020-36229 **PackageKit** Available for: macOS Big Sur Impact: A malicious application may be able to overwrite arbitrary files Description: An issue with path validation logic for hardlinks was addressed with improved path sanitization. CVE-2021-30738: Qingyang Chen of Topsec Alpha Team and Csaba Fitzl (@theevilbit) of Offensive Security **Sandbox** Available for: macOS Big Sur Impact: A malicious application may be able to bypass certain Privacy preferences Description: This issue was addressed with improved data protection. CVE-2021-30751: Csaba Fitzl (@theevilbit) of Offensive Security Entry added July 21, 2021 **Security** Available for: macOS Big Sur Impact: Processing a maliciously crafted certificate may lead to arbitrary code execution Description: A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code. CVE-2021-30737: xerub **smbx** Available for: macOS Big Sur Impact: An attacker in a privileged network position may be able to perform denial of service Description: A logic issue was addressed with improved state management. CVE-2021-30716: Aleksandar Nikolic of Cisco Talos **smbx** Available for: macOS Big Sur Impact: An attacker in a privileged network position may be able to execute arbitrary code Description: A memory corruption issue was addressed with improved state management. CVE-2021-30717: Aleksandar Nikolic of Cisco Talos **smbx** Available for: macOS Big Sur Impact: An attacker in a privileged network position may be able to leak sensitive user information Description: A path handling issue was addressed with improved validation. CVE-2021-30721: Aleksandar Nikolic of Cisco Talos **smbx** Available for: macOS Big Sur Impact: An attacker in a privileged network position may be able to leak sensitive user information Description: An information disclosure issue was addressed with improved state management. CVE-2021-30722: Aleksandar Nikolic of Cisco Talos **smbx** Available for: macOS Big Sur Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution Description: A logic issue was addressed with improved state management. CVE-2021-30712: Aleksandar Nikolic of Cisco Talos **Software Update** Available for: macOS Big Sur Impact: A person with physical access to a Mac may be able to bypass Login Window during a software update Description: This issue was addressed with improved checks. CVE-2021-30668: Syrus Kimiagar and Danilo Paffi Monteiro **SoftwareUpdate** Available for: macOS Big Sur Impact: A non-privileged user may be able to modify restricted settings Description: This issue was addressed with improved checks. CVE-2021-30718: SiQian Wei of ByteDance Security **TCC** Available for: macOS Big Sur Impact: A malicious application may be able to send unauthorized Apple events to Finder Description: A validation issue was addressed with improved logic. CVE-2021-30671: Ryan Bell (@iRyanBell) **TCC** Available for: macOS Big Sur Impact: A malicious application may be able to bypass Privacy preferences. Apple is aware of a report that this issue may have been actively exploited. Description: A permissions issue was addressed with improved validation. CVE-2021-30713: an anonymous researcher **WebKit** Available for: macOS Big Sur Impact: Processing maliciously crafted web content may lead to universal cross site scripting Description: A cross-origin issue with iframe elements was addressed with improved tracking of security origins. CVE-2021-30744: Dan Hite of jsontop **WebKit** Available for: macOS Big Sur 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-2021-21779: Marcin Towalski of Cisco Talos **WebKit** Available for: macOS Big Sur Impact: A malicious application may be able to leak sensitive user information Description: A logic issue was addressed with improved restrictions. CVE-2021-30682: Prakash (@1lastBr3ath) Entry updated July 21, 2021 **WebKit** Available for: macOS Big Sur Impact: Processing maliciously crafted web content may lead to universal cross site scripting Description: A logic issue was addressed with improved state management. CVE-2021-30689: an anonymous researcher **WebKit** Available for: macOS Big Sur Impact: Processing maliciously crafted web content may lead to arbitrary code execution Description: Multiple memory corruption issues were addressed with improved memory handling. CVE-2021-30749: an anonymous researcher and mipu94 of SEFCOM lab, ASU. working with Trend Micro Zero Day Initiative CVE-2021-30734: Jack Dates of RET2 Systems, Inc. (@ret2systems) working with Trend Micro Zero Day Initiative **WebKit** Available for: macOS Big Sur Impact: A malicious website may be able to access restricted ports on arbitrary servers Description: A logic issue was addressed with improved restrictions. CVE-2021-30720: David Schütz (@xdavidhu) **WebRTC** Available for: macOS Big Sur Impact: A remote attacker may be able to cause a denial of service Description: A null pointer dereference was addressed with improved input validation. CVE-2021-23841: Tavis Ormandy of Google CVE-2021-30698: Tavis Ormandy of Google ## Additional recognition **App Store** We would like to acknowledge Thijs Alkemade of Computest Research Division for their assistance. **CoreCapture** We would like to acknowledge Zuozhi Fan (@pattern_F_) of Ant-financial TianQiong Security Lab for their assistance. **ImageIO** We would like to acknowledge Jzhu working with Trend Micro Zero Day Initiative and an anonymous researcher for their assistance. **Mail Drafts** We would like to acknowledge Lauritz Holtmann (@_lauritz_) for their assistance. **WebKit** We would like to acknowledge Chris Salls (@salls) of Makai Security for their assistance. Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. [Contact the vendor](<http://support.apple.com/kb/HT2693>) for additional information. Published Date: November 03, 2023


Affected Software


CPE Name Name Version
macos big sur 11.4

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