Vulnerability in Microsoft Graphics Component Could Allow Remote Code Execution (MS15-097)

ITS Advisory Number: 
2015-108
Date(s) Issued: 
Tuesday, September 8, 2015
Subject: 
Vulnerability in Microsoft Graphics Component Could Allow Remote Code Execution (MS15-097)
Overview: 

Vulnerabilities have been identified within a Microsoft Graphics component that affects Microsoft Windows, Microsoft .NET Framework, Microsoft Office, and Microsoft Lync. Microsoft Windows is a family of operating systems. Microsoft Office is a suite of applications, servers and services for both Microsoft Windows and OS X. Microsoft Lync is an instant messaging client that replaced Windows Messenger. The vulnerability could allow remote code execution if a user opens a specially crafted document or webpage containing embedded TrueType or OpenType fonts. Successful exploitation could result in the attacker gaining kernel mode access. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

Systems Affected: 
  • Microsoft Windows Server 2008, Server 2008 R2
  • Microsoft Windows Server 2012, Server 2012 R2
  • Microsoft Windows Vista, Vista SP2
  • Microsoft Windows 7
  • Microsoft Windows 8 and 8.1
  • Microsoft Windows 10
  • Windows RT and Windows RT 8.1
  • Microsoft Office 2007
  • Microsoft Office 2010
  • Microsoft Live Meeting 2007 Console
  • Microsoft Lync 2010
  • Microsoft Lync 2013
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: 

Vulnerabilities have been identified within a Microsoft Graphics Component. The most severe could allow remote code execution. The vulnerabilities that exist are as follows:

  • A denial of service vulnerability exists in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles specially crafted OpenType fonts. [CVE-2015-2506]
  • Elevation of privilege vulnerabilities exist in Microsoft Windows when the Windows Adobe Type Manager Library fails to properly handle objects in memory. [CVE-2015-2507, CVE-2015-2508, CVE-2015-2512]
  • A remote code execution vulnerability exists in Microsoft Windows when components of Windows, Office, and Lync improperly handle specially crafted OpenType fonts. [CVE-2015-2510]
  • Multiple elevation of privilege vulnerabilities exist in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. [CVE-2015-2511, CVE-2015-2517, CVE-2015-2518, CVE-2015-2546]
  • An elevation of privilege vulnerability exists when the Windows kernel mode driver (Win32k.sys) fails to properly validate and enforce integrity levels during certain process initialization scenarios. [CVE-2015-2527]
  • A security feature bypass vulnerability exists when the Windows kernel fails to properly initialize a memory address, allowing an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (KASLR) bypass. [CVE-2015-2529]

Exploitation can occur if a user opens a specially crafted document or webpage.  Successful exploitation could result in the attacker gaining kernel mode access. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

Actions: 
  • Consider implementing the workarounds provided by Microsoft if patching cannot be completed immediately. (https://technet.microsoft.com/library/security/ms15-097).
  • Remind users not to visit un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Remind users not to open e-mail attachments from unknown users or suspicious e-mails from trusted sources.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.