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             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.1132
          Vulnerabilities in the OpenType Font (OTF) Driver Could
                   Allow Remote Code Execution (2296199)
                             15 December 2010

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Windows Open Type Font (OTF) driver
Publisher:         Microsoft
Operating System:  Windows XP
                   Windows Vista
                   Windows 7
                   Windows Server 2003
                   Windows Server 2008
Impact/Access:     Administrator Compromise -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-3959 CVE-2010-3957 CVE-2010-3956

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS10-091.mspx

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Microsoft Security Bulletin MS10-091 - Critical

Vulnerabilities in the OpenType Font (OTF) Driver Could Allow Remote Code 
Execution (2296199)

Version: 1.0

General Information

Executive Summary

  This security update resolves several privately reported vulnerabilities in 
  the Windows Open Type Font (OTF) driver that could allow remote code 
  execution. An attacker could host a specially crafted OpenType font on a 
  network share. The affected control path is then triggered when the user 
  navigates to the share in Windows Explorer, allowing the specially crafted 
  font to take complete control over an affected system. An attacker could 
  then install programs; view, change, or delete data; or create new accounts
  with full user rights.

  This security update is rated Critical for all supported editions of Windows
  Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2. This
  security update is also rated Important for all supported editions of 
  Windows XP and Windows Server 2003. For more information, see the 
  subsection, Affected and Non-Affected Software, in this section.

  The security update addresses the vulnerabilities by correcting the way that 
  the OpenType Font (OTF) driver indexes arrays when parsing OpenType fonts, 
  resets pointers when freeing memory, and parses the CMAP table when 
  rendering OpenType fonts. For more information about the vulnerabilities,
  see the Frequently Asked Questions (FAQ) subsection for the specific 
  vulnerability entry under the next section, Vulnerability Information.

Affected Software 

  Windows XP Service Pack 3
  Windows XP Professional x64 Edition Service Pack 2
  Windows Server 2003 Service Pack 2
  Windows Server 2003 x64 Edition Service Pack 2
  Windows Server 2003 with SP2 for Itanium-based Systems
  Windows Vista Service Pack 1
  Windows Vista Service Pack 2
  Windows Vista x64 Edition Service Pack 1
  Windows Vista x64 Edition Service Pack 2
  Windows Server 2008 for 32-bit Systems
  Windows Server 2008 for 32-bit Systems Service Pack 2*
  Windows Server 2008 for x64-based Systems
  Windows Server 2008 for x64-based Systems Service Pack 2*
  Windows Server 2008 for Itanium-based Systems 
  Windows Server 2008 for Itanium-based Systems Service Pack 2
  Windows 7 for 32-bit Systems
  Windows 7 for x64-based Systems
  Windows Server 2008 R2 for x64-based Systems*
  Windows Server 2008 R2 for Itanium-based Systems

Vulnerability Information

OpenType Font Index Vulnerability - CVE-2010-3956

  A remote code execution vulnerability exists in the way that the OpenType
  Font (OTF) driver improperly parses specially crafted OpenType fonts. An
  attacker who successfully exploited this vulnerability could run arbitrary
  code in kernel mode. An attacker could then install programs; view, change,
  or delete data; or create new accounts with full user rights.

OpenType Font Double Free Vulnerability - CVE-2010-3957

  A remote code execution vulnerability exists in the way that the OpenType 
  Font (OTF) driver improperly parses specially crafted OpenType fonts. An 
  attacker who successfully exploited this vulnerability could run arbitrary 
  code in kernel mode. An attacker could then install programs; view, change,
  or delete data; or create new accounts with full user rights.

OpenType CMAP Table Vulnerability - CVE-2010-3959

  A remote code execution vulnerability exists in the way that the OpenType
  Font (OTF) driver improperly parses specially crafted OpenType fonts. An
  attacker who successfully exploited this vulnerability could run arbitrary
  code in kernel mode. An attacker could then install programs; view, 
  change, or delete data; or create new accounts with full user rights.

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