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Microsoft Security Bulletin MS12-079 - Critical

Vulnerability in Microsoft Word Could Allow Remote Code Execution (2780642)

Published: | Updated:

Version: 1.1

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft Office. The vulnerability could allow remote code execution if a user opens a specially crafted RTF file using an affected version of Microsoft Office software, or previews or opens a specially crafted RTF email message in Outlook while using Microsoft Word as the email viewer. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. 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 all supported editions of Microsoft Word 2010 and Microsoft Word 2007. This security update is also rated Important for all supported editions of Microsoft Word 2003, and all supported versions of Microsoft Word Viewer, Microsoft Office Compatibility Pack, and Microsoft Office Web Apps. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by modifying the way that Microsoft Office parses RTF-formatted data. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation. Customers can configure automatic updating to check online for updates from Microsoft Update by using the Microsoft Update service. Customers who have automatic updating enabled and configured to check online for updates from Microsoft Update typically will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates from Microsoft Update and install this update manually. For information about specific configuration options in automatic updating in supported editions of Windows XP and Windows Server 2003, see Microsoft Knowledge Base Article 294871. For information about automatic updating in supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2, see Understanding Windows automatic updating.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update immediately using update management software, or by checking for updates using the Microsoft Update service.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. Microsoft Knowledge Base Article 2780642 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues. When currently known issues and recommended solutions pertain only to specific releases of this software, this article provides links to further articles.

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.

Affected Software

Microsoft Office Software 

Microsoft Office Suite and Other SoftwareComponentMaximum Security ImpactAggregate Severity RatingUpdates Replaced
Microsoft Office Suites and Components
Microsoft Office 2003 Service Pack 3Microsoft Word 2003 Service Pack 3 
(KB2760497)
Remote Code ExecutionImportantKB2687483 in MS12-064 replaced by KB2760497
Microsoft Office 2007 Service Pack 2Microsoft Word 2007 Service Pack 2[1] 
(KB2760421)
Remote Code ExecutionCriticalKB2687315 in MS12-064 replaced by KB2760421
Microsoft Office 2007 Service Pack 3Microsoft Word 2007 Service Pack 3[1] 
(KB2760421)
Remote Code ExecutionCriticalKB2687315 in MS12-064 replaced by KB2760421
Microsoft Office 2010 Service Pack 1 (32-bit editions)Microsoft Word 2010 Service Pack 1 (32-bit editions) 
(KB2760410)
Remote Code ExecutionCriticalKB2553488 in MS12-064 replaced by KB2760410
Microsoft Office 2010 Service Pack 1 (64-bit editions)Microsoft Word 2010 Service Pack 1 (64-bit editions) 
(KB2760410)
Remote Code ExecutionCriticalKB2553488 in MS12-064 replaced by KB2760410
Other Microsoft Office Software
Microsoft Word Viewer 
(KB2760498)
Not applicableRemote Code ExecutionImportantKB2687485 in MS12-064 replaced by KB2760498
Microsoft Office Compatibility Pack Service Pack 2 
(KB2760416)
Not applicableRemote Code ExecutionImportantKB2687314 in MS12-064 replaced by KB2760416
Microsoft Office Compatibility Pack Service Pack 3 
(KB2760416)
Not applicableRemote Code ExecutionImportantKB2687314 in MS12-064 replaced by KB2760416

[1]For Microsoft Office Word 2007, in addition to security update package KB2760421, customers also need to install the security update for Microsoft Office Compatibility Pack (KB2760416) to be protected from the vulnerability described in this bulletin.

Microsoft Server Software 

SoftwareComponent Maximum Security ImpactAggregate Severity RatingUpdates Replaced
Microsoft SharePoint Server 2010 Service Pack 1Word Automation Services
(KB2760405)
Remote Code ExecutionImportantKB2598237 in MS12-064 replaced by KB2760405
Microsoft Office Web Apps 2010 Service Pack 1 
(KB2687412)
Not applicableRemote Code ExecutionImportantKB2687401 in MS12-064 replaced by KB2687412

Non-Affected Software 

Office and Other Software
Microsoft Office 2008 for Mac
Microsoft Office for Mac 2011
Microsoft Word 2013 (32-bit editions)
Microsoft Word 2013 (64-bit editions)
Microsoft Word 2013 RT
Microsoft Office Web Apps 2013

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Word RTF 'listoverridecount' Remote Code Execution Vulnerability - CVE-2012-2539

Update Information

Detection and Deployment Tools and Guidance

Security Update Deployment

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

  • An anonymous contributor, working with Beyond Security's SecuriTeam Secure Disclosure program, for reporting the Word RTF 'listoverridecount' Remote Code Execution Vulnerability (CVE-2012-2539)

Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please go to the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

How to obtain help and support for this security update

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

  • V1.0 (December 11, 2012): Bulletin published.
  • V1.1 (June 26, 2013): Added a link to Microsoft Knowledge Base Article 2780642 under Known Issues in the Executive Summary.