MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-183

DATE(S) ISSUED:
12/13/2016

SUBJECT:
Multiple Vulnerabilities in Microsoft Graphics Component Could Allow for Remote Code Execution (MS16-146)

OVERVIEW:

Multiple vulnerabilities have been discovered in Microsoft Graphics Component, the most severe of which could allow for remote code execution. These vulnerabilities exist due to the way the Windows Graphics Component handles objects in the memory. Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

THREAT INTELLIGENCE:

There are no reports of this vulnerability being exploited in the wild.

SYSTEM AFFECTED:

· Windows Vista, 7, 8.1, RT 8.1, 10

· Windows Server 2008, 2008 R2, 2012, 2012 R2, 2016, Core

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 Microsoft Graphics Component, the most severe of which could allow for remote code execution. The vulnerabilities are as follows:

· Multiple remote code execution vulnerabilities exist due to the way the Windows Graphics Component handles objects in the memory. (CVE-2016-7272, CVE-2016-7273)

· An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. (CVE-2016-7257)

To exploit this vulnerability, an attacker would need to convince a user to open a specially crafted document, or visit a maliciously crafted website. Successful exploitation of these vulnerabilities could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

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 from un-trusted sources.

· Apply the Principle of Least Privilege to all systems and services.

REFERENCES:

Microsoft:

https://technet.microsoft.com/en-us/library/security/ms16-146.aspx

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7272

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7273

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7257