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Multiple Vulnerabilities in Google Chrome Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2018-133

DATE(S) ISSUED:

12/05/2018

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, which could allow for arbitrary code execution. Google Chrome is a web browser used to access the Internet. Successful exploitation of the most severe 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 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 71.0.3578.80

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. These vulnerabilities can be exploited if a user visits, or is redirected to, a specially crafted web page. Details of these vulnerabilities are as follows:

  • Heap buffer overflow in Blink. (CVE-2018-18341)
  • Heap buffer overflow in Canvas. (CVE-2018-18338)
  • Heap buffer overflow in Skia. (CVE-2018-18335)
  • Inappropriate implementation in Extensions. (CVE-2018-18344)
  • Inappropriate implementation in Media. (CVE-2018-18352)
  • Inappropriate implementation in Navigation. (CVE-2018-18347)
  • Inappropriate implementation in Network Authentication. (CVE-2018-18353)
  • Inappropriate implementation in Omnibox. (CVE-2018-18348)
  • Inappropriate implementation in Site Isolation. (CVE-2018-18345)
  • Incorrect security UI in Blink. (CVE-2018-18346)
  • Insufficient data validation in Shell Integration. (CVE-2018-18354)
  • Insufficient policy enforcement in Blink. (CVE-2018-18350, CVE-2018-18349)
  • Insufficient policy enforcement in Navigation. (CVE-2018-18351)
  • Insufficient policy enforcement in Proxy. (CVE-2018-18358)
  • Insufficient policy enforcement in URL Formatter. (CVE-2018-18355, CVE-2018-18357)
  • Out of bounds read in V8. (CVE-2018-18359)
  • Out of bounds write in V8. (CVE-2018-18342, CVE-2018-17480)
  • Use after free in Blink. (CVE-2018-18337)
  • Use after free in MediaRecorder. (CVE-2018-18340)
  • Use after free in PDFium. (CVE-2018-18336)
  • Use after free in Skia. (CVE-2018-18343, CVE-2018-18356)
  • Use after free in WebAudio. (CVE-2018-18339)
  • Use after frees in PDFium. (CVE-2018-17481)

Successful exploitation of the most severe of these vulnerabilities could allow for an attacker to execute arbitrary 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 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:

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17480 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17481 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18335 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18336 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18337 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18338 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18339 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18340 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18341 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18342 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18343 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18344 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18345 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18346 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18347 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18348 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18349 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18350 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18351 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18352 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18353 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18354 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18355 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18356 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18357 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18358 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18359

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