CIS CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2015-069

DATE(S) ISSUED:
06/23/2015

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

OVERVIEW:

Multiple vulnerabilities have been discovered in Google Chrome, 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 may allow an attacker to execute arbitrary code in the context of the user running the affected application or result in denial-of-service conditions.

Depending on the privileges associated with the user, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

THREAT INTELLIGENCE:

There are currently no reports of these vulnerabilities being exploited in the wild. There are known proof-of-concept exploits for these vulnerabilities.

SYSTEM AFFECTED:

  • Google Chrome prior to 43.0.2357.130

RISK:

Government:

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

Businesses:

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

Home users: High

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in Google Chrome. These vulnerabilities can be triggered by a user visiting a specially crafted web page. Details of these vulnerabilities are as follows:

  • Adobe Flash Player Could Allow Remote Code Execution (CVE-2015-3096, CVE-2015-3098, CVE-2015-3099, CVE-2015-3100, CVE-2015-3102, CVE-2015-3103,CVE-2015-3104, CVE-2015-3105, CVE-2015-3106, CVE-2015-3107)
  • Scheme validation error in WebUI (CVE-2015-1266)
  • Cross-origin bypass in Blink (CVE-2015-1267)
  • Cross-origin bypass in Blink (CVE-2015-1268)
  • Normalization error in HSTS/HPKP preload list (CVE-2015-1269)

Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code, in the context of the browseror obtain sensitive information. Depending on the privileges afforded to the browser, an attacker can bypass security restrictions, or cause denial-of-service conditions; other attacks may also be possible.

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:

http://googlechromereleases.blogspot.com/2015/06/chrome-stable-update.html

http://googlechromereleases.blogspot.com/2015/06/stable-channel-update.html

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1266

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1267

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1268

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1269

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3096

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3098

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3099

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3100

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3102

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3103

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3104

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3105

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3106

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3107