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Security Advisories

Google Chrome Could Allow for Arbitrary Code Execution

Fortify Security Team
Dec 7, 2021

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for arbitrary code execution. Google Chrome is a web browser used to access the Internet. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. 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:

  • Google Chrome versions prior to 96.0.4664.93

RISK:
Government:

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

Businesses:

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

Home users: Low

TECHNICAL SUMMARY:
Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for arbitrary code execution. Details of the vulnerabilities are as follows:

  • Use after free vulnerability exists in web apps (CVE-2021-4052)
  • Use after free vulnerability exists in UI (CVE-2021-4053)
  • Incorrect security UI vulnerability exists in autofill (CVE-2021-4054)
  • Heap buffer overflow vulnerability exists in extensions (CVE-2021-4055)
  • Type Confusion vulnerability exists in loader (CVE-2021-4056)
  • Use after free vulnerability exists in file API (CVE-2021-4057)
  • Heap buffer overflow vulnerability exists in ANGLE (CVE-2021-4058)
  • Insufficient data validation vulnerability exists in loader (CVE-2021-4059)
  • Type Confusion vulnerability exists in V8 (CVE-2021-4061)
  • Heap buffer overflow vulnerability exists in BFCache (CVE-2021-4062)
  • Use after free vulnerability exists in developer tools (CVE-2021-4063)
  • Use after free vulnerability exists in screen capture (CVE-2021-4064)
  • Use after free vulnerability exists in autofill (CVE-2021-4065)
  • Integer underflow vulnerability exists in ANGLE (CVE-2021-4066)
  • Use after free vulnerability exists in window manager (CVE-2021-4067)
  • Insufficient validation of untrusted input vulnerability exists in new tab page (CVE-2021-4068)

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges associated with the application, an attacker could view, change, or delete data. 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 the stable channel update provided by Google to vulnerable systems immediately after appropriate testing.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from un-trusted sources.
  • Apply the Principle of Least Privilege to all systems and services.

REFERENCES:
Google:
https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop.html

CVE:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4052
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4053
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4054
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4055
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4056
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4057
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4058
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4059
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4061
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4062
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4063
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4064
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4065
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4066
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4067
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4068

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