(MS10-091) Vulnerabilities in the OpenType Font (OTF) Driver Could Allow Remote Code Execution (2296199)

Publish date: March 14, 2011

Severity: CRITICAL

CVE Identifier: CVE-2010-3956,CVE-2010-3957,CVE-2010-3959

Advisory Date: MAR 14, 2011

DESCRIPTION

This security update resolves several vulnerabilities in the Windows Open Type Font (OTF) driver, which could allow remote users to execute code remotely on the affected system. When users navigate to a specially crafted OpenType font on a network share via Windows Explorer, the affected control path is triggered and allows the crafted font to take complete control on the system. This could then allow malicious users to remotely install programs; view, change, or delete data; or create new accounts will full user rights.

More specifically, this security update addresses the vulnerabilities by correcting the way by which 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.

TREND MICRO PROTECTION INFORMATION

For information on patches specific to the affected software, please proceed to the Microsoft Web page.

Note for affected software:

*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option.

Trend Micro clients using OfficeScan with Intrusion Defense Firewall (IDF) may refer to the table below for the pattern filter identifier(s):

Vulnerability ID	Identifier & Title	IDF First Pattern Version	IDF First Pattern Release Version
CVE-2010-3957	1004541 - OpenType Font File CFF table Code Execution Vulnerability	10-038	Dec 15, 2010
CVE-2010-3959	1004538 - OpenType Font File CMAP Table Paring Vulnerability	10-038	Dec 15, 2010

SOLUTION

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

AFFECTED SOFTWARE AND VERSION

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 and Windows Vista Service Pack 2
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

Related Blog Entries

Worm Poses as a Font File, Uses LNK Vulnerability to Propagate

Related Vulnerability

December 2010 - Microsoft Releases 17 Security Advisories

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