Multiple vulnerabilities have been discovered in the Google Android operating system (OS), the most severe of which could allow for remote code execution. Android is an operating system developed by Google for mobile devices, including, but not limited to, smartphones, tablets, and watches. Successful exploitation of the most severe of these vulnerabilities could allow for remote code execution within the context of a privileged process. Depending on the privileges associated with this application, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

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SYSTEMS AFFECTED:

• Android OS builds utilizing Security Patch Levels issued prior to April 5, 2022

RISK:
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Government:

• Large and medium government entities: High
• Small government entities: High

Businesses:

• Large and medium business entities: High
• Small business entities: High
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Home users: Low

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TECHNICAL SUMMARY:

‍Multiple vulnerabilities have been discovered in Google Android OS, the most severe of which could allow for remote code execution within the context of a privileged process. Details of these vulnerabilities are as follows:

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•Multiple vulnerabilities in Framework, the most severe of which could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. (CVE-2021-0694,CVE-2021-39794, CVE-2021-39795, CVE-2021-39796, CVE-2021-39797, CVE-2021-39798,CVE-2021-39799)

•Multiple vulnerabilities in Media Framework, the most severe vulnerability in this section could lead to remote information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.(CVE-2021-39803, CVE-2021-39804)

•Multiple vulnerabilities in System, the most severe vulnerability in this section could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. (CVE-2021-39808, CVE-2021-39805, CVE-2021-39809, CVE-2021-39807)

•Multiple vulnerabilities in the MediaProvider component of Project Mainline (CVE-2021-39795, CVE-2021-39803)

•Multiple vulnerabilities in Kernel components, the most severe vulnerability in this section could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.(CVE-2021-0707, CVE-2021-39801, CVE-2021-39802,CVE-2021-39800)

•Multiple high severity vulnerabilities in MediaTek A-GPS and Modem LTE RRC components. (CVE-2022-20081, CVE-2021-25477,)

•Multiple high severity vulnerabilities in Qualcomm WLAN, Bluetooth, Kernel and Display components. (CVE-2021-35081, CVE-2021-35112,CVE-2021-35123, CVE-2021-30334, CVE-2021-35091, CVE-2021-35095, CVE-2021-35130)

•Multiple high and critical severity vulnerabilities in Qualcomm closed-source components. (CVE-2021-30339, CVE-2021-30341,CVE-2021-30342, CVE-2021-30343, CVE-2021-30347, CVE-2021-35104, CVE-2021-30281,CVE-2021-30338, CVE-2021-30340, CVE-2021-30344, CVE-2021-30345, CVE-2021-30346,CVE-2021-30349, CVE-2021-30350, CVE-2021-35070, CVE-2021-35100)

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Successful exploitation of the most severe of these vulnerabilities could allow for remote code execution within the context of a privileged process. Depending on the privileges associated with this application, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

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RECOMMENDATIONS:
We recommend the following actions be taken:

• Apply appropriate updates by Google Android or mobile carriers to vulnerable systems, immediately after appropriate testing.
• Remind users to only download applications from trusted vendors in the Play Store.
• Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
• Inform and educate users regarding threats posed by hypertext links contained in emails or attachments, especially from un-trusted sources.

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REFERENCES:

Google Android:
https://source.android.com/security/bulletin/2022-04-01 

CVE:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35081 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35091 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35095 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35100 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35104 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35112 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35123 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35130 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39794 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39795 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39795 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39796 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39797 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39798 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39799 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39800 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39801 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39802 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39803 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39803 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39804 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39805 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39807 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39808 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39809 
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-20081 

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