MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-024

DATE(S) ISSUED:
02/09/2016

SUBJECT:
Cumulative Security Update for Internet Explorer (MS16-009)

OVERVIEW:

Multiple vulnerabilities have been discovered in Microsoft Internet Explorer. These vulnerabilities could allow an attacker to execute code in the context of the browser if a user views a specially crafted web page. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. Depending on the privileges associated with the user, an attacker may install programs; view, change, or delete data; or create new accounts with full user rights.

 

THREAT INTELLIGENCE:

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

SYSTEMS AFFECTED:

  • Internet Explorer 9

  • Internet Explorer 10

  • Internet Explorer 11

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:

Microsoft Internet Explorer is prone to multiple vulnerabilities that could allow remote code execution. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.The vulnerabilities are as follows:

  • One remote code execution vulnerability exists when Internet Explorer improperly validates input before loading dynamic link library (DLL) files. (CVE-2016-0041)

  • One information disclosure vulnerability exists in Internet Explorer when Hyperlink Object Library improperly discloses the contents of its memory. (CVE-2016-0059)

  • Eight remote code execution vulnerabilities exist when Internet Explorer improperly accesses objects in memory. (CVE-2016-0060, CVE-2016-0061, CVE-2016-0062, CVE-2016-0063, CVE-2016-0064, CVE-2016-0067, CVE-2016-0071, CVE-2016-0072)

  • One spoofing vulnerability exists when a Microsoft browser does not properly parse HTTP responses. (CVE-2016-0077)

  • Two elevation of privilege vulnerabilities exist when Internet Explorer does not properly enforce cross-domain policies. (CVE-2016-0068, CVE-2016-0069)

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Apply appropriate patches provided by Microsoft 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 those from un-trusted sources.

 

REFERENCES:

Microsoft:

https://technet.microsoft.com/en-us/library/security/ms16-009.aspx

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0041

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0059

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0060

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0061

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0062

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0063

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0064

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0067

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0068

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0069

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0070

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0071

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0072

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0077