Multiple Vulnerabilities in Microsoft Graphics Component Could Allow for Remote Code Execution (MS16-120)

ITS Advisory Number: 
2016-173
Date(s) Issued: 
Tuesday, October 11, 2016
Subject: 
Multiple Vulnerabilities in Microsoft Graphics Component Could Allow for Remote Code Execution (MS16-120)
Overview: 

Multiple vulnerabilities have been discovered in Microsoft Graphics Component, which could allow for remote code execution. These vulnerabilities can be exploited by either convincing a user to open a specially crafted document or visit a specially crafted webpage. 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.

Systems Affected: 
  • Microsoft Windows Vista, 7, 8.1, RT 8.1, 10
  • Microsoft Windows Server 2008 and 2008 R2 (Including Server Core Installations)
  • Microsoft Windows Server 2012 and 2012 R2 (including Server Core Installations) 
  • Microsoft Office 2007, 2010, and Word Viewer
  • Skype for Business 2016, Microsoft Lync 2013, Microsoft Lync 2010, Live Meeting 2007
  • Silverlight
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
High
BUSINESS
Large and medium business entities: 
High
Small business entities: 
High
Home Users: 
High
Description: 

Multiple vulnerabilities have been discovered in Microsoft's Graphics Component, the worst of which could allow for remote code execution. The vulnerabilities are as follows:

  • A remote code execution vulnerability exists in the way Windows Graphic Device Interface handles objects in memory (CVE-2016-3393).
  • A remote code execution vulnerability exists in the way Windows Font Library improperly handles specially crafted embedded fonts (CVE-2016-3396).
  • Multiple information disclosure vulnerabilities exist in the way that the Windows Graphics Device Interface handles objects in memory (CVE-2016-3209, CVE-2016-3262, CVE-2016-3263).
  • An elevation of privilege vulnerability exists in the way that the Windows Graphics Component improperly handles objects in memory (CVE-2016-7182).
  • An elevation of privilege vulnerability exists in the way that the Windows kernel fails to properly handle objects in memory (CVE-2016-3270).

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.

Actions: 
  • After appropriate testing, apply patches provided by Microsoft to vulnerable systems.
  • 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.