CIS Logo
tagline: Confidence in the Connected World

Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2018-116

DATE(S) ISSUED:

10/16/2018

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could allow for remote code execution. Google Chrome is a web browser used to access the Internet. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute remote code in the context of the browser. Depending on the privileges associated with the application, an attacker could 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:

  • Google Chrome versions prior to 70.0.3538.67

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 remote 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:

  • Cross-origin URL disclosure in Blink. (CVE-2018-17468)
  • Heap buffer overflow in PDFium. (CVE-2018-17469)
  • iframe sandbox escape on iOS. (CVE-2018-17472)
  • Lack of limits on update() in ServiceWorker. (CVE-2018-5179)
  • Memory corruption in Angle. (CVE-2018-17466)
  • Memory corruption in GPU Internals. (CVE-2018-17470)
  • Remote code execution in V8. (CVE-2018-17463)
  • Sandbox escape in AppCache. (CVE-2018-17462)
  • Security UI occlusion in full screen mode. (CVE-2018-17471, CVE-2018-17476)
  • UI spoof in Extensions. (CVE-2018-17477)
  • URL spoof in Omnibox. (CVE-2018-17467, CVE-2018-17464, CVE-2018-17475, CVE-2018-17473)
  • Use after free in Blink. (CVE-2018-17474)
  • Use after free in V8. (CVE-2018-17465)

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute remote code in the context of the browser. Depending on the privileges associated with the application, an attacker could 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.

RECOMENDATIONS:

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:

Get Email Updates When Cyber Threats Like This Arise

Arrow Subscribe to Advisories

Protect Your Systems from Cyber Threats Like This

CIS Controls That Help Avoid This Issue Arrow CIS Control 3: Continuous Vulnerability Assessment and Remediation Arrow CIS Control 7: Email and Web Browser Protections CIS Benchmark and Other Tools for Related Technology Arrow Google Chrome