MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-083

DATE(S) ISSUED:
5/26/2016

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 result in arbitrary 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 arbitrary 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.

SYSTEMS AFFECTED:

  • Google Chrome prior to version 51.0.2704.63

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. These vulnerabilities can be triggered by a user visiting a specially crafted web page. Details of these vulnerabilities are as follows:Cross-origin bypass in extension bindings. (CVE-2016-1672)(CVE-2016-1676)

  • Cross-origin bypass in Blink. (CVE-2016-1673) (CVE-2016-175)
  • Cross-origin bypass in extensions. (CVE-2016-1674)
  • Type confusion in V8. (CVE-2016-1677)
  • Heap overflow in V8. (CVE-2016-1678)
  • Heap use-after-free in V8 bindings. (CVE-2016-1679)
  • Heap use-after-free in Skia. (CVE-2016-1680)
  • Heap overflow in PDFium. (CVE-2016-1681)
  • CSP bypass for ServiceWorker. (CVE-2016-1682)
  • Out-of-bounds access in libxslt. (CVE-2016-1683)
  • Integer overflow in libxslt.(CVE-2016-1684)
  • Out-of-bounds read in PDFium. (CVE-2016-1685) (CVE-2016-1686)
  • Information leak in extensions. (CVE-2016-1687)
  • Out-of-bounds read in V8. (CVE-2016-1688)
  • Heap buffer overflow in media (CVE-2016-1689)
  • Heap use-after-free in Autofill. (CVE-2016-1690)
  • Heap buffer-overflow in Skia. (CVE-2016-1691)
  • Limited cross-origin bypass in ServiceWorker. (CVE-2016-1692)
  • HTTP Download of Software Removal Tool. (CVE-2016-1693)
  • HPKP pins removed on cache clearance. (CVE-2016-1694)
  • Various fixes from internal audits, fuzzing and other initiatives. (CVE-2016-1695)

Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary 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: 

http://googlechromereleases.blogspot.in/2016/05/stable-channel-update_25.html 

 

CVE:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1672

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1673

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1674

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1675

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1676

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1677

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1678

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1679

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1680

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1681

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1682

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1683

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1684

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1685

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1686

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1687

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1688

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1689

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1690

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1691

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1692

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1693

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1694

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1695