MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-139

DATE(S) ISSUED:
09/14/2016

SUBJECT:
Multiple�Vulnerabilities in Google Chrome Could Allow for Remote Code Execution

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, the most severe of which could result in 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 these vulnerabilities could allow an attacker to execute remote code in the context of the browser, obtain sensitive information, bypass security restrictions, or cause denial-of-service conditions.

THREAT INTELLIGENCE:

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

SYSTEM AFFECTED:

· Google Chrome prior to 53.0.2785.113

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 result in 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:

· Use after free in Blink. (CVE-2016-5170, CVE-2016-5171)

· Arbitrary Memory Read in v8. (CVE-2016-5172)

· Extension resource access. (CVE-2016-5173)

· Popup not correctly suppressed. (CVE-2016-5174)

· Various fixes from internal audits, fuzzing and other initiatives. (CVE-2016-5175)

Successful exploitation of these vulnerabilities could allow an attacker to execute remote code in the context of the browser, obtain sensitive information, bypass security restrictions, or cause denial-of-service conditions.

RECOMMENDATIONS:

We recommend the following actions be taken:

· Apply appropriate patches 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.

REFERENCES:

Google:

https://googlechromereleases.blogspot.com/2016/09/stable-channel-update-for-desktop_13.html

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5170

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5171

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5172

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5173

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5174

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5175