Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3101.2 Apple Security Updates for macOS Big Sur 11.6 21 September 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: macOS Big Sur Publisher: Apple Operating System: Mac OS Impact/Access: Root Compromise -- Remote with User Interaction Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-30865 CVE-2021-30860 CVE-2021-30859 CVE-2021-30858 CVE-2021-30857 CVE-2021-30855 CVE-2021-30853 CVE-2021-30850 CVE-2021-30847 CVE-2021-30845 CVE-2021-30844 CVE-2021-30843 CVE-2021-30842 CVE-2021-30841 CVE-2021-30832 CVE-2021-30830 CVE-2021-30829 CVE-2021-30828 CVE-2021-30827 CVE-2021-22925 CVE-2013-0340 Reference: ESB-2021.3103 ESB-2021.3101 ESB-2021.3099 Original Bulletin: https://support.apple.com/HT212804 Revision History: September 21 2021: Vendor added additional information for APPLE-SA-2021-09-13-3 macOS Big Sur 11.6 September 15 2021: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 APPLE-SA-2021-09-20-7 Additional information for APPLE-SA-2021-09-13-3 macOS Big Sur 11.6 macOS Big Sur 11.6 addresses the following issues. Information about the security content is also available at https://support.apple.com/HT212804. CoreGraphics Available for: macOS Big Sur 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 CUPS Available for: macOS Big Sur 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: an anonymous researcher Entry added September 20, 2021 CUPS Available for: macOS Big Sur Impact: A local user may be able to read arbitrary files as root Description: This issue was addressed with improved checks. CVE-2021-30828: an anonymous researcher Entry added September 20, 2021 CUPS Available for: macOS Big Sur Impact: A local user may be able to execute arbitrary files Description: A URI parsing issue was addressed with improved parsing. CVE-2021-30829: an anonymous researcher Entry added September 20, 2021 curl Available for: macOS Big Sur 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 Entry added September 20, 2021 CVMS 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 state management. CVE-2021-30832: Mickey Jin (@patch1t) of Trend Micro Entry added September 20, 2021 FontParser Available for: macOS Big Sur 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 Entry added September 20, 2021 Gatekeeper Available for: macOS Big Sur Impact: A malicious application may bypass Gatekeeper checks Description: This issue was addressed with improved checks. CVE-2021-30853: Gordon Long (@ethicalhax) of Box, Inc. Entry added September 20, 2021 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-2021-30847: Mike Zhang of Pangu Lab Entry added September 20, 2021 Kernel Available for: macOS Big Sur 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 Entry added September 20, 2021 Kernel Available for: macOS Big Sur 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 Entry added September 20, 2021 Kernel Available for: macOS Big Sur 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: Zweig of Kunlun Lab Entry added September 20, 2021 Kernel Available for: macOS Big Sur 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 Entry added September 20, 2021 libexpat Available for: macOS Big Sur 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 Entry added September 20, 2021 Preferences Available for: macOS Big Sur 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) Entry added September 20, 2021 Sandbox Available for: macOS Big Sur 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 Entry added September 20, 2021 SMB Available for: macOS Big Sur Impact: A local user may be able to read kernel memory Description: An out-of-bounds read was addressed with improved bounds checking. CVE-2021-30845: Peter Nguyen Vu Hoang of STAR Labs Entry added September 20, 2021 SMB Available for: macOS Big Sur 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 Entry added September 20, 2021 WebKit Available for: macOS Big Sur Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited. Description: A use after free issue was addressed with improved memory management. CVE-2021-30858: an anonymous researcher Additional recognition APFS We would like to acknowledge Koh M. Nakagawa of FFRI Security, Inc. for their assistance. Entry added September 20, 2021 App Support We would like to acknowledge @CodeColorist, an anonymous researcher for their assistance. Entry added September 20, 2021 CoreML We would like to acknowledge hjy79425575 working with Trend Micro Zero Day Initiative for their assistance. Entry added September 20, 2021 CUPS We would like to acknowledge an anonymous researcher for their assistance. Entry added September 20, 2021 Kernel We would like to acknowledge Anthony Steinhauser of Google's Safeside project for their assistance. Entry added September 20, 2021 Sandbox We would like to acknowledge Csaba Fitzl (@theevilbit) of Offensive Security for their assistance. Entry added September 20, 2021 smbx We would like to acknowledge Zhongcheng Li (CK01) for their assistance. Entry added September 20, 2021 Installation note: This update may be obtained from the Mac App Store or Apple's Software Downloads web site: https://support.apple.com/downloads/ Information will also be posted to the Apple Security Updates web site: https://support.apple.com/kb/HT201222 This message is signed with Apple's Product Security PGP key, and details are available at: https://www.apple.com/support/security/pgp/ - -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEePiLW1MrMjw19XzoeC9qKD1prhgFAmFI888ACgkQeC9qKD1p rhi/Bg/9GiqXl8sxPjDpATJqneZ1GcAxWxBZgkFrcLV/cMwrVqniWsOeVHqHjMSY eJUkGehUtKsYE0g8Uk0qJqOUl3dxxGJpIDytOQJB3TFdd1BpZSK/tOChVem1JV1B +CMhqDnmR/u7bLqfCr1p6J5QJNHjTjgBA4RthdzZZ52pLGql7/2qfaJwpeHkheS4 5EKmch8zh0CGRqrUTg1HgY67ierNsz47jIU6n7UeMwjskRU3xM9VqJ9s4eKGAtSv 4Ry16pv0xUZ4cmL5EiLm2/eFbY8ByCji7jYPP0POBO4l518TGpaX2PaZBP9v0rrD t6cPEZHnsRaZ49OYak6z9iA8teKGSs6aCMuzSxExvlT8+YySf1o1nefbRH/tZMfn bwSO0ZyPsS9WYyuG/zX08U3CKOTkjqhLaOwVwte+cAeg2QS85aa9XPMG6PKcpyfu R7auxS92+Dg+R+97dAsI9TprSutCTw4iY8lyK9MVJSnh+zQSZEihUh4EaSufTHRC NlOSHvsTfXqsHaeed6sVKyX4ADHCUvRbCCIrqJKUs6waNd2T2XF7SzvgTSDJMHU9 4AL/jpnltTjDJTtMO999VZKNzYurrGiHvBs5zHWr91+eaHW8YGdsDERsX3BFYLe3 85i+Yge0iXlP7mT32cWxIw4AWDFITFiHnmV1/cdsCd2GIkqkhFw= =9bjT - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYUlhGONLKJtyKPYoAQit4Q/9GJW21yqZ3e6B0XBSWR0gTP8KqQh26r/I Xp7bBX7WArrYfg7X1xeDSKD+cjSCVYfU1jVExZVdHpPWVH30yKms6Co/WrvRqLmZ rEKjLZDcgcQG2Rpk63IbcbosgRThbwhCcSVx870TW5U4284wJV9wZll58tVXwJzN qNvhK+TR0usjbW0mKBn9C/3ChujBEIS3S3+ZDx2Zx0R//YFk9jYzKTWm5Kzl5NsS LQ0Biq3vUUeNdrXnTCqPovalVb0/rbJ0c8L3TMeRFvkOGeXCYu4Fl8uFul1sNTX0 MVCWDUKl/hJ8ttyTHa2f1JfIapmkJrvnOB2w633zBky52LEQkfaEAn0blaL43vBU 4wUN4y5wjZcTE3tYzkkfvVrt5yfKbUgR9E4iplseptWZ4TuxFLd84nLhg8I62MKN RxvmyuNJzZbBuRyoW7S3IVc/o6bATt8x8O6/oUeguTFirc6Y1YuqjnlIs+ROfTYI P41tlu+DZYWPB3YR7rso92YGSuzC1EGiO70QSw/CsQB2pcG/MEEazc/88npyqUAp 4u2Fo1WMJnOygbPOjV7TFpV+Ol9k8uyTFibxycAIZ/VnWjq0qVTlJAnwk641fcHS fPhMWL9+NHZ9c+TuXv5hn3zswe67LbbyXIUfTnHFo9NKq1XOvoPeBb3o+jbc1Sqw cx71uN6dIWY= =ICl8 -----END PGP SIGNATURE-----