Headline
CVE-2021-39658: Android Security Bulletin—February 2022 | Android Open Source Project
ismsEx service is a vendor service in unisoc equipment?ismsEx service is an extension of sms system service?but it does not check the permissions of the caller?resulting in permission leaks?Third-party apps can use this service to arbitrarily modify and set system properties?Product: AndroidVersions: Android SoCAndroid ID: A-207479207
Published February 7, 2022 | Updated February 17, 2022
The Android Security Bulletin contains details of security vulnerabilities affecting Android devices. Security patch levels of 2022-02-05 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 have been released to the Android Open Source Project (AOSP) repository and linked from this bulletin. This bulletin also includes links to patches outside of AOSP
The most severe of these issues is a critical security vulnerability in the System component that could lead to remote escalation of privilege with no additional execution privileges needed. 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.
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.
- 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.
- 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.
2022-02-01 security patch level vulnerability details
In the sections below, we provide details for each of the security vulnerabilities that apply to the 2022-02-01 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 lead to local escalation of privilege with no additional execution privileges needed.
CVE
References
Type
Severity
Updated AOSP versions
CVE-2021-39619
A-197399948
EoP
High
11, 12
CVE-2021-39663
A-200682135*
EoP
High
10
CVE-2021-39676
A-197228210*
EoP
High
11
CVE-2021-39664
A-203938029
ID
High
12
Media Framework
The most severe vulnerability in this section could lead to local escalation of privilege with no additional execution privileges needed.
CVE
References
Type
Severity
Updated AOSP versions
CVE-2020-13112
A-194342672*
EoP
High
10, 11
CVE-2020-13113
A-196085005*
EoP
High
10, 11
CVE-2021-39665
A-204077881
ID
High
12
CVE-2021-39666
A-204445255 [2]
ID
High
11, 12
System
The most severe vulnerability in this section could lead to remote escalation of privilege with no additional execution privileges needed.
CVE
References
Type
Severity
Updated AOSP versions
CVE-2021-39675
A-205729183
EoP
Critical
12
CVE-2021-39668
A-193445603
EoP
High
11, 12
CVE-2021-39669
A-196969991
EoP
High
11, 12
CVE-2021-39671
A-206718630 [2]
EoP
High
12
CVE-2021-39674
A-201083442
EoP
High
10, 11, 12
CVE-2021-0706
A-193444889*
DoS
High
10, 11
2022-02-05 security patch level vulnerability details
In the sections below, we provide details for each of the security vulnerabilities that apply to the 2022-02-05 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.
System
The vulnerability in this section could lead to local information disclosure with no additional execution privileges needed.
CVE
References
Type
Severity
Updated AOSP versions
CVE-2021-39631
A-193890833 [2]
ID
High
10, 11, 12
Amlogic components
This vulnerability affects Amlogic components and further details are available directly from Amlogic. The severity assessment of this issue is provided directly by Amlogic.
CVE
References
Severity
Component
CVE-2021-39672
A-202018701*
High
Fastboot
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-2022-20024
A-209705228
M-ALPS06219064*
High
System service
CVE-2022-20025
A-209700749
M-ALPS06126832*
High
Bluetooth
CVE-2022-20026
A-209705229
M-ALPS06126827*
High
Bluetooth
CVE-2022-20027
A-209702508
M-ALPS06126826*
High
Bluetooth
CVE-2022-20028
A-209702509
M-ALPS06198663*
High
Bluetooth
Unisoc components
These vulnerabilities affect Unisoc components and further details are available directly from Unisoc. The severity assessment of these issues is provided directly by Unisoc.
CVE
References
Severity
Component
CVE-2021-39616
A-204686438
U-1704529*
High
sprd-vowifi
CVE-2021-39635
A-206492634
U-1731024*
High
ims_ex
CVE-2021-39658
A-207479207
U-1732729*
High
IsmsEx
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-2021-35068
A-202025798
QC-CR#2982971
High
Bluetooth
CVE-2021-35069
A-203032261
QC-CR#3001191
High
WLAN
CVE-2021-35074
A-204905255
QC-CR#2998013
High
Kernel
CVE-2021-35075
A-204905325
QC-CR#2998149
High
Kernel
CVE-2021-35077
A-204904989
QC-CR#3007135
High
Kernel
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-2021-30317
A-195750667*
Critical
Closed-source component
CVE-2021-30309
A-195750718*
High
Closed-source component
CVE-2021-30318
A-202025316*
High
Closed-source component
CVE-2021-30322
A-195751178*
High
Closed-source component
CVE-2021-30323
A-195750446*
High
Closed-source component
CVE-2021-30326
A-195751080*
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.
- Security patch levels of 2022-02-01 or later address all issues associated with the 2022-02-01 security patch level.
- Security patch levels of 2022-02-05 or later address all issues associated with the 2022-02-05 security patch level and all previous patch levels.
Device manufacturers that include these updates should set the patch string level to:
- [ro.build.version.security_patch]:[2022-02-01]
- [ro.build.version.security_patch]:[2022-02-05]
For some devices on Android 10 or later, the Google Play system update will have a date string that matches the 2022-02-01 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.
- Devices that use the 2022-02-01 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.
- Devices that use the security patch level of 2022-02-05 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
U-
UNISOC 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
February 7, 2022
Bulletin Released
1.1
February 8, 2022
Bulletin revised to include AOSP links
1.2
February 17, 2022
Revised CVE table
Related news
In Boa, there is a possible escalation of privilege due to a stack buffer overflow. This could lead to remote escalation of privilege from a proximal attacker with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: A20210008; Issue ID: OSBNB00123241.
Out-of-bounds write vulnerability in the power consumption module. Successful exploitation of this vulnerability may cause the system to restart.
In multiple functions of AvatarPhotoController.java, there is a possible access to content owned by system content providers due to a confused deputy. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11Android ID: A-250637906
Configuration defects in the secure OS module. Successful exploitation of this vulnerability will affect confidentiality.
There is an incorrect buffer size calculation vulnerability in the video framework.Successful exploitation of this vulnerability may affect availability.
Improper validation of input when provisioning the HDCP key can lead to memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables
An issue was discovered in libexif before 0.6.22. Several buffer over-reads in EXIF MakerNote handling could lead to information disclosure and crashes. This is different from CVE-2020-0093.