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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3155 APPLE-SA-2021-09-20-3 tvOS 15 21 September 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: tvOS Publisher: Apple Operating System: Apple iOS 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-2021-30857 CVE-2021-30854 CVE-2021-30851 CVE-2021-30850 CVE-2021-30849 CVE-2021-30847 CVE-2021-30846 CVE-2021-30843 CVE-2021-30842 CVE-2021-30841 CVE-2021-30837 CVE-2021-30835 CVE-2021-30810 CVE-2013-0340 Reference: ESB-2019.2136 ESB-2018.0201 Original Bulletin: https://support.apple.com/kb/HT201222 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 APPLE-SA-2021-09-20-3 tvOS 15 tvOS 15 addresses the following issues. Information about the security content is also available at https://support.apple.com/HT212815. Accessory Manager Available for: Apple TV 4K and Apple TV HD Impact: An application may be able to execute arbitrary code with kernel privileges Description: A memory consumption issue was addressed with improved memory handling. CVE-2021-30837: an anonymous researcher FontParser Available for: Apple TV 4K and Apple TV HD 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: Apple TV 4K and Apple TV HD 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: Apple TV 4K and Apple TV HD 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 libexpat Available for: Apple TV 4K and Apple TV HD 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: Apple TV 4K and Apple TV HD Impact: A sandboxed process may be able to circumvent sandbox restrictions Description: A logic issue was addressed with improved state management. CVE-2021-30854: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020) of Tencent Security Xuanwu Lab (xlab.tencent.com) Sandbox Available for: Apple TV 4K and Apple TV HD 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 WebKit Available for: Apple TV 4K and Apple TV HD Impact: Processing maliciously crafted web content may lead to arbitrary code execution Description: A memory corruption issue was addressed with improved memory handling. CVE-2021-30846: Sergei Glazunov of Google Project Zero WebKit Available for: Apple TV 4K and Apple TV HD Impact: Processing maliciously crafted web content may lead to arbitrary code execution Description: Multiple memory corruption issues were addressed with improved memory handling. CVE-2021-30849: Sergei Glazunov of Google Project Zero WebKit Available for: Apple TV 4K and Apple TV HD Impact: Processing maliciously crafted web content may lead to code execution Description: A memory corruption vulnerability was addressed with improved locking. CVE-2021-30851: Samuel GroÃ\x{159} of Google Project Zero Wi-Fi Available for: Apple TV 4K and Apple TV HD Impact: An attacker in physical proximity may be able to force a user onto a malicious Wi-Fi network during device setup Description: An authorization issue was addressed with improved state management. CVE-2021-30810: an anonymous researcher Additional recognition Assets We would like to acknowledge Cees Elzinga for their assistance. UIKit We would like to acknowledge an anonymous researcher for their assistance. Installation note: Apple TV will periodically check for software updates. Alternatively, you may manually check for software updates by selecting "Settings -> System -> Software Update -> Update Software." To check the current version of software, select "Settings -> General -> About." 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----- iQIzBAEBCAAdFiEEePiLW1MrMjw19XzoeC9qKD1prhgFAmFI88wACgkQeC9qKD1p rhjopg/+L4N95EZXqBnWjnOmxq1SfqUdthxi9ler2tmjuaADeKRrNsfGSY5sy8Te C6dzHhmaah1PE7rnEAKKajG24odfjj/8kzDQHi4Qa+hSRldkYpr0NJ2xUdzhPrK6 QRZN7adoydN8+ybvigVWjZmFyo4/77+SX8ItuYTTGBu6FRhRynfSi32hcxZgoy/k Y9z59/Ghk8QQ8lRbGj4ewNpBji+9QW5JTzNBckMXlCl1XN9f36nxnh5koOXP1Xt9 fl7v7nzugEFE9qQ96jxJlJ8EtwF7d9EjQY7+XGUyJlz+6dkAf48Y0jiOm8SK5gyh zn8Y69P0QvIF2olzR4gqF/pqVVAu5qQhvStxqtAlbh1/D9Fwg7xGO/1lVR2kN5jP h8EgAV+WvV040WxcPmfjDJLR6VJax3fnZUpFN/kUx52ZNYdQYtHulW0KsHZPaseJ SoQevoUe6E27KLqV/gR36lTfW7cXcfIEyag8Aa6j2vd0vxJiO5kKnNSnpHL+n0ZZ +xce3GA9K/jvNdH1+RbboCVddXXHJCsTKbSqo0e9udVT9D6AAk2ExTE1yFLy/9WT /A8JHODkqGrlssyC/Anwvs4Gk4a+ChXjMOew+BfX7ylT6AtCaGBauXe9xIUSd6Jn OQxdF95DtRvMC/vXsH8/HMicbcrLsUO6lTEvE/HFqTOb7r+iIXU= =4Ewt - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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 iQIVAwUBYUk/v+NLKJtyKPYoAQih8RAAhzDhRsLJksyJFMQjGS1S8AMKpHc80ii3 eqDZfaDFAeyhPePZCfQDII/YIRJpYtCTNy5aJXxTJOwvp+MWlKKgkDdu0ZNMeoQ9 KZsgkRzx3Sw7E2u7s0vdrAPULVi2GDgfVipi9jw5s96US2OmS5k+Nowc28WnDDiF pn5naPYSP1iBqg+yurDZo9Uf1R/7k2kP/12mJvcrolRyBmrxRL0zhW/zfNdkmuPx 6HrFzPCaNuz79ZqECipUzvfOW4XpYIhCg/pQcJuOhhOeyQgkoCD6agNJLpWOJfjM 3NvBWcWCEoIa1q9pmr0Uaqn01gJ06eKrup43dpSsubb8lY1ct/i2QACt6iOfmF0k 3oszKX0pUlpngfUwnuEUnF/WNMVzEcYWqaTnQigT/8hk479uX192+hS9snPQcVsA oQjiOVkFOK/fYRgG7x7QSzAzsesAYLsMr7DE5tzPkR+ZHOXuUB3/YUWRQUzr1Naz XYBHjWPQUECNY28v8TTVwt2DuvN7ymEgti6adQswcbQxfLF61CkIzEp3r2BX+pMk IE8EFJaffkwYkP6Ig11L/iZFqUUcJ/mcXQaajARCl71R38cHF9ckwdUoiRQbGqq/ i7WHGkMGdqmIfPYOrjEgWFm2UhZJTPrOJ5OAhFO5wZc6Iufy5cvzMACUmdvBel6D OoecCFsdfto= =boQ3 -----END PGP SIGNATURE-----