Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

ITS ADVISORY NUMBER: 

2020-148 - UPDATED

DATE(S) ISSUED: 

Wednesday, November 4, 2020

SUBJECT: 

Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

OVERVIEW: 

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.

ORIGINAL THREAT INTELLIGENCE:

While Google is aware of reports that an exploit for CVE-2020-16009 exists, there are currently no reports of these vulnerabilities being exploited in the wild.

November 4 - UPDATED THREAT INTELLIGENCE:

There are reports of CVE-2020-16009 and CVE-2020-16010 being exploited in the wild.

SYSTEMS AFFECTED: 

  • Google Chrome versions prior to 86.0.4240.183

RISK:

Government:

Large and medium government entities: High

Small government entities: Medium

Business:

Large and medium business entities: High

Small business entities: Medium

Home Users: Low

DESCRIPTION: 

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for arbitrary code execution. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Details of the vulnerabilities are as follows: 

  • Use after free in user interface (CVE-2020-16004)

  • Insufficient policy enforcement in ANGLE (CVE-2020-16005)

  • Inappropriate implementation in V8 (CVE-2020-16006)

  • Insufficient data validation in installer (CVE-2020-16007)

  • Stack buffer overflow in WebRTC (CVE-2020-16008)

  • Inappropriate implementation in V8 (CVE-2020-16009)

  • Heap buffer overflow in UI on Windows (CVE-2020-16011) 

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.

ACTIONS: 

  • After appropriate testing, immediately apply the stable channel update provided by Google to vulnerable systems.

  • 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/2020/11/stable-channel-update-for-...

CVE:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16004
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16005
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16006
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16007
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16008
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16009
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16011

November 4 - UPDATED REFERENCES:
HIT8SecNews:
https://news.hitb.org/content/google-fixes-two-more-chrome-zero-days-wer...