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Microsoft Security Bulletin MS13-091 - Important

Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2885093)

Published:

Version: 1.0

General Information

Executive Summary

This security update resolves three privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a specially crafted WordPerfect document file is opened in an affected version of Microsoft Office software. An attacker who successfully exploited the most severe vulnerabilities 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 Important for supported editions of Microsoft Office 2003, Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2013 RT software. 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 Microsoft Office software parses specially crafted files. For more information about the vulnerabilities, 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, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity 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.

Knowledge Base Article

Knowledge Base Article2885093
File informationYes
SHA1/SHA2 hashesYes
Known issuesNone

Affected and Non-Affected Software

The following software has 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 Suite and Other SoftwareMaximum Security ImpactAggregate Severity RatingUpdates Replaced
Microsoft Office 2003
Microsoft Office 2003 Service Pack 3
(file format converters)
(2760494)
Remote Code ExecutionImportant975051 in MS09-073
Microsoft Office 2007
Microsoft Office 2007 Service Pack 3
(file format converters)
(2760415)
Remote Code ExecutionImportantNone
Microsoft Office 2010
Microsoft Office 2010 Service Pack 1 (32-bit editions)
(file format converters)
(2553284)
Remote Code ExecutionImportantNone
Microsoft Office 2010 Service Pack 1 (32-bit editions)
(proofing tools)
(2760781)
Remote Code ExecutionImportantNone
Microsoft Office 2010 Service Pack 2 (32-bit editions)
(file format converters)
(2553284)
Not applicable[1]No severity ratingNone
Microsoft Office 2010 Service Pack 2 (32-bit editions)
(proofing tools)
(2760781)
Not applicable[1]No severity ratingNone
Microsoft Office 2010 Service Pack 1 (64-bit editions)
(file format converters)
(2553284)
Remote Code ExecutionImportantNone
Microsoft Office 2010 Service Pack 1 (64-bit editions)
(proofing tools)
(2760781)
Remote Code ExecutionImportantNone
Microsoft Office 2010 Service Pack 2 (64-bit editions)
(file format converters)
(2553284)
Not applicable[1]No severity ratingNone
Microsoft Office 2010 Service Pack 2 (64-bit editions)
(proofing tools)
(2760781)
Not applicable[1]No severity ratingNone
Microsoft Office 2013
Microsoft Office 2013 (32-bit editions)
(file format converters)
(2768005)
Remote Code ExecutionImportantNone
Microsoft Office 2013 (64-bit editions)
(file format converters)
(2768005)
Remote Code ExecutionImportantNone
Microsoft Office 2013 RT[2]
(file format converters)
(2768005)
Remote Code ExecutionImportantNone

[1]Although updates are available for Microsoft Office 2010 Service Pack 2, the software is not affected by the vulnerabilities described in this bulletin. Users who choose not to apply the updates for Microsoft Office 2010 Service Pack 2 will not increase the security risk for their system. However, Microsoft recommends that users install all updates offered to their systems. This helps to maintain consistency for shared files across Office products. See the Update FAQ for more information.

[2]This update is available via Windows Update.

 

Non-Affected Software 

Office and Other Software
Microsoft Office Compatibility Pack Service Pack 3
Microsoft Office for Mac 2011

Update FAQ

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

WPD File Format Memory Corruption Vulnerability - CVE-2013-0082

Word Stack Buffer Overwrite Vulnerability - CVE-2013-1324

Word Heap Overwrite Vulnerability - CVE-2013-1325

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:

  • Merliton for reporting the WPD File Format Memory Corruption Vulnerability (CVE-2013-0082)
  • Will Dormann of the CERT/CC for reporting the Word Stack Buffer Overwrite Vulnerability (CVE-2013-1324)
  • Will Dormann of the CERT/CC for reporting the Word Heap Overwrite Vulnerability (CVE-2013-1325)

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 (November 12, 2013): Bulletin published.