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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2606 Android Security Bulletin - August 2021 3 August 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Android OS Publisher: Android Operating System: Android Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Unknown/Unspecified Access Confidential Data -- Unknown/Unspecified Reduced Security -- Unknown/Unspecified Resolution: Patch/Upgrade CVE Names: CVE-2021-30261 CVE-2021-30260 CVE-2021-28375 CVE-2021-3347 CVE-2021-1978 CVE-2021-1976 CVE-2021-1972 CVE-2021-1947 CVE-2021-1939 CVE-2021-1920 CVE-2021-1919 CVE-2021-1916 CVE-2021-1914 CVE-2021-1904 CVE-2021-0646 CVE-2021-0645 CVE-2021-0642 CVE-2021-0641 CVE-2021-0640 CVE-2021-0639 CVE-2021-0593 CVE-2021-0591 CVE-2021-0584 CVE-2021-0582 CVE-2021-0581 CVE-2021-0580 CVE-2021-0579 CVE-2021-0578 CVE-2021-0576 CVE-2021-0574 CVE-2021-0573 CVE-2021-0519 CVE-2020-14381 Reference: ESB-2021.2439 ESB-2021.2136 ESB-2021.1624 ESB-2020.3516 Original Bulletin: https://source.android.com/security/bulletin/2021-08-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Android Security Bulletin-August 2021 Published August 2, 2021 The Android Security Bulletin contains details of security vulnerabilities affecting Android devices. Security patch levels of 2021-08-05 or later address all of these issues. To learn how to check a device's security patch level, see Check and update your Android version . Android partners are notified of all issues at least a month before publication. Source code patches for these issues will be released to the Android Open Source Project (AOSP) repository in the next 48 hours. We will revise this bulletin with the AOSP links when they are available. The most severe of these issues is a high security vulnerability in the Media Framework component that could enable a local malicious application to bypass operating system protections that isolate application data from other applications. The severity assessment is based on the effect that exploiting the vulnerability would possibly have on an affected device, assuming the platform and service mitigations are turned off for development purposes or if successfully bypassed. Refer to the Android and Google Play Protect mitigations section for details on the Android security platform protections and Google Play Protect, which improve the security of the Android platform. Note : Information on the latest over-the-air update (OTA) and firmware images for Google devices is available in the August 2021 Pixel Update Bulletin . Android and Google service mitigations This is a summary of the mitigations provided by the Android security platform and service protections such as Google Play Protect . These capabilities reduce the likelihood that security vulnerabilities could be successfully exploited on Android. o Exploitation for many issues on Android is made more difficult by enhancements in newer versions of the Android platform. We encourage all users to update to the latest version of Android where possible. o The Android security team actively monitors for abuse through Google Play Protect and warns users about Potentially Harmful Applications . Google Play Protect is enabled by default on devices with Google Mobile Services , and is especially important for users who install apps from outside of Google Play. 2021-08-01 security patch level vulnerability details In the sections below, we provide details for each of the security vulnerabilities that apply to the 2021-08-01 patch level. Vulnerabilities are grouped under the component they affect. Issues are described in the tables below and include CVE ID, associated references, type of vulnerability , severity , and updated AOSP versions (where applicable). When available, we link the public change that addressed the issue to the bug ID, like the AOSP change list. When multiple changes relate to a single bug, additional references are linked to numbers following the bug ID. Devices with Android 10 and later may receive security updates as well as Google Play system updates . Framework The most severe vulnerability in this section could enable a local malicious application to bypass user interaction requirements in order to gain access to additional permissions. CVE References Type Severity Updated AOSP versions CVE-2021-0640 A-187957589 EoP High 9, 10, 11 CVE-2021-0645 A-157320644 EoP High 11 CVE-2021-0646 A-153352319 EoP High 8.1, 9, 10, 11 Media Framework The vulnerability in this section could enable a local malicious application to bypass operating system protections that isolate application data from other applications. CVE References Type Severity Updated AOSP versions CVE-2021-0519 A-176533109 ID High 10, 11 EoP High 8.1, 9 System The most severe vulnerability in this section could enable a local attacker using a specially crafted transmission to gain access to additional permissions. CVE References Type Severity Updated AOSP versions CVE-2021-0591 A-179386960 EoP High 8.1, 9, 10, 11 CVE-2021-0593 A-179386068 EoP High 8.1, 9, 10, 11 CVE-2021-0584 A-179289794 ID High 8.1, 9, 10, 11 CVE-2021-0641 A-185235454 ID High 8.1, 9, 10, 11 CVE-2021-0642 A-185126149 ID High 8.1, 9, 10, 11 Google Play system updates The following issues are included in Project Mainline components. Component CVE Statsd CVE-2021-0640 Media Codecs CVE-2021-0519 Media Codecs, Media Framework components CVE-2021-0584 2021-08-05 security patch level vulnerability details In the sections below, we provide details for each of the security vulnerabilities that apply to the 2021-08-05 patch level. Vulnerabilities are grouped under the component they affect. Issues are described in the tables below and include CVE ID, associated references, type of vulnerability , severity , and updated AOSP versions (where applicable). When available, we link the public change that addressed the issue to the bug ID, like the AOSP change list. When multiple changes relate to a single bug, additional references are linked to numbers following the bug ID. Kernel components The most severe vulnerability in this section could result in arbitrary kernel code execution due to a use after free. CVE References Type Severity Component CVE-2020-14381 A-175193031 EoP High Futex Upstream kernel CVE-2021-3347 A-171705902 EoP High Futex Upstream kernel CVE-2021-28375 A-183188047 EoP High FastRPC Upstream kernel MediaTek components These vulnerabilities affect MediaTek components and further details are available directly from MediaTek. The severity assessment of these issues is provided directly by MediaTek. CVE References Severity Component CVE-2021-0573 A-187231635 High asf extractor M-ALPS05489195 * CVE-2021-0574 A-187234876 High asf extractor M-ALPS05561346 * CVE-2021-0576 A-187236084 High flv extractor M-ALPS05517392 * CVE-2021-0578 A-187161772 High wifi driver M-ALPS05551422 * CVE-2021-0579 A-187231636 High wifi driver M-ALPS05551426 * CVE-2021-0580 A-187231637 High wifi driver M-ALPS05560223 * CVE-2021-0581 A-187231638 High wifi driver M-ALPS05560246 * CVE-2021-0582 A-187149601 High wifi driver M-ALPS05560246 * Widevine DRM This vulnerability affects Widevine DRM components and further details are available directly from Widevine DRM. The severity assessment of this issue is provided directly by Widevine DRM. CVE References Severity Component CVE-2021-0639 A-190724551 * High Widevine Qualcomm components These vulnerabilities affect Qualcomm components and are described in further detail in the appropriate Qualcomm security bulletin or security alert. The severity assessment of these issues is provided directly by Qualcomm. CVE References Severity Component CVE-2021-1972 A-187073198 Critical WLAN QC-CR#2823861 CVE-2021-1976 A-187074482 Critical WLAN QC-CR#2857392 A-175037520 CVE-2021-1904 QC-CR#2778197 High Kernel QC-CR#2835930 CVE-2021-1939 A-187073199 High Display QC-CR#2826994 CVE-2021-1947 A-187074483 High Display QC-CR#2840102 [ 2 ] [ 3 ] [ 4 ] CVE-2021-1978 A-187074565 High WLAN QC-CR#2859124 Qualcomm closed-source components These vulnerabilities affect Qualcomm closed-source components and are described in further detail in the appropriate Qualcomm security bulletin or security alert. The severity assessment of these issues is provided directly by Qualcomm. CVE References Severity Component CVE-2021-1916 A-179040380 * Critical Closed-source component CVE-2021-1919 A-179040019 * Critical Closed-source component CVE-2021-1920 A-179040550 * Critical Closed-source component CVE-2021-1914 A-179040552 * High Closed-source component CVE-2021-30260 A-187073203 * High Closed-source component CVE-2021-30261 A-187073202 * High Closed-source component Common questions and answers This section answers common questions that may occur after reading this bulletin. 1. How do I determine if my device is updated to address these issues To learn how to check a device's security patch level, see Check and update your Android version . o Security patch levels of 2021-08-01 or later address all issues associated with the 2021-08-01 security patch level. o Security patch levels of 2021-08-05 or later address all issues associated with the 2021-08-05 security patch level and all previous patch levels. Device manufacturers that include these updates should set the patch string level to: o [ro.build.version.security_patch]:[2021-08-01] o [ro.build.version.security_patch]:[2021-08-05] For some devices on Android 10 or later, the Google Play system update will have a date string that matches the 2021-08-01 security patch level. Please see this article for more details on how to install security updates. 2. Why does this bulletin have two security patch levels This bulletin has two security patch levels so that Android partners have the flexibility to fix a subset of vulnerabilities that are similar across all Android devices more quickly. Android partners are encouraged to fix all issues in this bulletin and use the latest security patch level. o Devices that use the 2021-08-01 security patch level must include all issues associated with that security patch level, as well as fixes for all issues reported in previous security bulletins. o Devices that use the security patch level of 2021-08-05 or newer must include all applicable patches in this (and previous) security bulletins. Partners are encouraged to bundle the fixes for all issues they are addressing in a single update. 3. What do the entries in the Type column mean Entries in the Type column of the vulnerability details table reference the classification of the security vulnerability. Abbreviation Definition RCE Remote code execution EoP Elevation of privilege ID Information disclosure DoS Denial of service N/A Classification not available 4. What do the entries in the References column mean Entries under the References column of the vulnerability details table may contain a prefix identifying the organization to which the reference value belongs. Prefix Reference A- Android bug ID QC- Qualcomm reference number M- MediaTek reference number N- NVIDIA reference number B- Broadcom reference number 5. What does an * next to the Android bug ID in the References column mean Issues that are not publicly available have an * next to the corresponding reference ID. The update for that issue is generally contained in the latest binary drivers for Pixel devices available from the Google Developer site . 6. Why are security vulnerabilities split between this bulletin and device / partner security bulletins, such as the Pixel bulletin Security vulnerabilities that are documented in this security bulletin are required to declare the latest security patch level on Android devices. Additional security vulnerabilities that are documented in the device / partner security bulletins are not required for declaring a security patch level. Android device and chipset manufacturers may also publish security vulnerability details specific to their products, such as Google , Huawei , LGE , Motorola , Nokia , or Samsung . Versions Version Date Notes 1.0 August 2, 2021 Bulletin published - --------------------------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). 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