Microsoft Security Bulletin MS10-079 - Important

Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (2293194)

Published: | Updated:

Version: 1.2

General Information

Executive Summary

This security update resolves eleven privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a user opens a specially crafted Word file. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the local 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 all supported editions of Microsoft Word 2002, Microsoft Word 2003, Microsoft Word 2007, Microsoft Word 2010, Microsoft Office 2004 for Mac, and Microsoft Office 2008 for Mac; Open XML File Format Converter for Mac; and all supported versions of Microsoft Office Word Viewer and Microsoft Office Compatibility Pack. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The update addresses the vulnerabilities by modifying the way that Microsoft Office Word parses specially crafted Word files. 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. Microsoft recommends that customers apply the update at the earliest opportunity.

Known Issues. Microsoft Knowledge Base Article 2293194 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, visit Microsoft Support Lifecycle.

Affected Software

Microsoft Office Suites and Software

Microsoft Office and Other Productivity SoftwareComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Office Suites and Components
Microsoft Office XP Service Pack 3Microsoft Word 2002 Service Pack 3
(KB2328360)
Remote Code ExecutionImportantMS10-056
Microsoft Office 2003 Service Pack 3Microsoft Word 2003 Service Pack 3
(KB2344911)
Remote Code ExecutionImportantMS10-056
Microsoft Office 2007 Service Pack 2Microsoft Word 2007 Service Pack 2[1]
(KB2344993)
Remote Code ExecutionImportantMS10-056
Microsoft Office 2010 (32-bit editions)Microsoft Word 2010 (32-bit editions)
(KB2345000)
Remote Code ExecutionImportantNone
Microsoft Office 2010 (64-bit editions)Microsoft Word 2010 (64-bit editions)
(KB2345000)
Remote Code ExecutionImportantNone
Microsoft Office for Mac
Microsoft Office 2004 for Mac
(KB2422343)
Not applicableRemote Code ExecutionImportantMS10-056
Microsoft Office 2008 for Mac
(KB2422352)
Not applicableRemote Code ExecutionImportantMS10-056
Open XML File Format Converter for Mac
(KB2422398)
Not applicableRemote Code ExecutionImportantMS10-056
Other Microsoft Office Software
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2
(KB2345043)
Not applicableRemote Code ExecutionImportantMS10-056
Microsoft Word Viewer
(KB2345009)
Not applicableRemote Code ExecutionImportantMS10-056

Microsoft Server Software

Microsoft Office Web AppsComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Office Web Apps[2]
(KB2346411)
Not applicableRemote Code ExecutionImportantNone
Microsoft Office Web AppsMicrosoft Word Web App[2]
(KB2345015)
Remote Code ExecutionImportantNone

[1]For Microsoft Word 2007 Service Pack 2, in addition to security update package KB2344993, customers also need to install the security update for Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2 (KB2345043) to be protected from the vulnerabilities described in this bulletin.

[2]For Microsoft Office Web Apps, customers need to install both security update KB2346411 and security update KB2345015 to be protected from the vulnerabilities described in this bulletin.

Non-Affected Software

Office and Other Software
Microsoft Works 9

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Word Uninitialized Pointer Vulnerability - CVE-2010-2747

Word Boundary Check Vulnerability - CVE-2010-2748

Word Index Vulnerability - CVE-2010-2750

Word Stack Overflow Vulnerability - CVE-2010-3214

Word Return Value Vulnerability - CVE-2010-3215

Word Bookmarks Vulnerability - CVE-2010-3216

Word Pointer Vulnerability - CVE-2010-3217

Word Heap Overflow Vulnerability - CVE-2010-3218

Word Index Parsing Vulnerability - CVE-2010-3219

Word Parsing Vulnerability - CVE-2010-3220

Word Parsing Vulnerability - CVE-2010-3221

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:

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 visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

  • Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
  • International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

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 (October 12, 2010): Bulletin published.
  • V1.1 (October 13, 2010): Corrected the package name for the Microsoft Office Compatibility Pack (KB2345043) update. This is an informational change only. Customers who have already successfully updated their systems do not need to take any action.
  • V1.2 (November 3, 2010): Corrected the bulletin replacement information for the Microsoft Word Viewer update (KB2345009). This is an informational change only. There were no changes to the detection logic or the update files.