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             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.0024
         Vulnerability in the Embedded OpenType Font Engine Could
                        Allow Remote Code Execution
                              13 January 2010

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

Product:           Embedded OpenType Font Engine
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-0018  

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS10-001.mspx

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Microsoft Security Bulletin MS10-001

Critical Vulnerability in the Embedded OpenType Font Engine Could Allow 
Remote Code Execution (972270)

   Published: January 12, 2010

   Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in 
Microsoft Windows. The vulnerability could allow remote code execution if a 
user viewed content rendered in a specially crafted Embedded OpenType (EOT) 
font in client applications that can render EOT fonts, such as Microsoft 
Internet Explorer, Microsoft Office PowerPoint, or Microsoft Office Word. An 
attacker who successfully exploited this vulnerability could take complete 
control of an affected system. 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 users who operate with administrative user rights.

This security update is rated Critical for Microsoft Windows 2000, and is 
rated Low for Windows XP, Windows Server 2003, Windows Vista, Windows 
Server 2008, Windows 7, and Windows Server 2008 R2. For more information, 
see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by correcting the way that 
the Embedded OpenType Font Engine decompresses specially crafted files and 
content containing embedded fonts. For more information about the 
vulnerability, see the Frequently Asked Questions (FAQ) subsection for the 
specific vulnerability entry under the next section, Vulnerability 
Information.

Affected Software

  Microsoft Windows 2000 Service Pack 4
  Windows XP Service Pack 2 and 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, Windows Vista Service Pack 1, and Windows Vista Service 
    Pack 2
  Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and 
    Windows Vista x64 Edition Service Pack 2
  Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit 
    Systems Service Pack 2*
  Windows Server 2008 for x64-based Systems and Windows Server 2008 for 
    x64-based Systems Service Pack 2*
  Windows Server 2008 for Itanium-based Systems and 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

*Server Core installation not affected. The vulnerabilities addressed by this 
   update do not affect supported editions of Windows Server 2008 or Windows 
   Server 2008 R2 as indicated, when installed using the Server Core 
   installation option.

Vulnerability Information

Microtype Express Compressed Fonts Integer Flaw in the LZCOMP Decompressor 
  Vulnerability - CVE-2010-0018

  A remote code execution vulnerability exists in the way that the Microsoft 
  Windows Embedded OpenType (EOT) Font Engine decompresses specially crafted 
  EOT fonts. If a user is logged on with administrative user rights, an 
  attacker who successfully exploited this vulnerability could take complete 
  control of an affected system. 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 users who operate with administrative user 
  rights.

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The University of Queensland
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