CIS CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2015-045

DATE(S) ISSUED:
4/17/15

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. Attackers can exploit these issues to execute arbitrary code in the context of the browser.

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.

THREAT INTELLIGENCE:

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

SYSTEM AFFECTED:

Google Chrome Prior to version 42.0.2311.90

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:

Thirteen 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 the HTML parser (CVE-2015-1235)
  • Cross-origin bypass in Blink (CVE-2015-1236)
  • Use-after-free in IPC (CVE-2015-1237)
  • Out-of-bounds write error in Skia (CVE-2015-1238)
  • Out-of-bounds read error in WebGL (CVE-2015-1240)
  • Tap-Jacking attack (CVE-2015-1241)
  • Type Confusion attack in V8 (CVE-2015-1242)
  • HSTS bypass attack in WebSockets (CVE-2015-1244)
  • Use-after free in PDFium (CVE-2015-1245)
  • Out-of-bounds read error in Blink (CVE-2015-1246)
  • Scheme issues flaw in OpenSearch (CVE-2015-1247)
  • SafeBrowsing bypass attack (CVE-2015-1248)
  • Multiple vulnerabilities were fixed in V8, the javascript engine in use by Google Chrome (CVE-2015-1249)

Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code in the context of the browser. Depending on the privileges afforded to the browser, an attacker can bypass security restrictions, or causedenial-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 Chrome:

http://googlechromereleases.blogspot.ie/2015/04/stable-channel-update_14.html

Security Focus:

http://www.securityfocus.com/bid/74165

http://www.securityfocus.com/bid/74167

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1235

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1236

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1237

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1238

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1240

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1241

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1242

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1244

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1245

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1246

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1247

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1248

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1249