Google Android OS Could Allow for Remote Code Execution

by | Aug 3, 2021 | Advisories

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.

THREAT INTELLIGENCE: There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

  • Android OS builds utilizing Security Patch Levels issued prior to August ¬†5, 2021.

RISK:
Government:

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

Businesses:

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

Home users: Low

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:

  • Multiple vulnerabilities in Framework that could enable a local malicious application to bypass user interaction requirements in order to gain access to additional permissions. (CVE-2021-0640, CVE-2021-0645, CVE-2021-0646)
  • Multiple vulnerabilities in Media Framework that could enable a local malicious application to bypass operating system protections that isolate application data from other applications. (CVE-2021-0519)
  • Multiple vulnerabilities in System that could enable a local attacker using a specially crafted transmission to gain access to additional permissions. (CVE-2021-0591, CVE-2021-0593, CVE-2021-0584, CVE-2021-0641, CVE-2021-0642)
  • Multiple vulnerabilities in Kernel components could result in arbitrary kernel code execution due to a use after free. (CVE-2020-14381, CVE-2021-3347, CVE-2021-28375)
  • Multiple high severity vulnerabilities in MediaTek Components. (CVE-2021-0573, CVE-2021-0574, CVE-2021-0576, CVE-2021-0578, CVE-2021-0579, CVE-2021-0580, CVE-2021-0581, CVE-2021-0582)
  • A high severity vulnerability in Widevine DRM. (CVE-2021-0639)
  • Multiple Critical severity vulnerabilities in Qualcomm components. (CVE-2021-1972, CVE-2021-1976)
  • Multiple high severity vulnerabilities in Qualcomm components. (CVE-2021-1904, CVE-2021-1939, CVE-2021-1947, CVE-2021-1978)
  • Multiple critical and high severity vulnerabilities in Qualcomm closed-source components (CVE-2021-1916, CVE-2021-1919, CVE-2021-1920, CVE-2021-1914, CVE-2021-30260, CVE-2021-30261)

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.

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.

REFERENCES:

Google Android:
https://source.android.com/security/bulletin/2021-08-01

CVE:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0519
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0573
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0574
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0576
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0578
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0579
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0580
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0581
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0582
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0584
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0591
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0593
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0639
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0640
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0641
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0642
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0645
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0646
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1904
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1914
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1916
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1919
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1920
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1939
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1947
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1972
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1976
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1978
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3347
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28375
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30260
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30261