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Microsoft Security Bulletin MS09-010 - Critical

Vulnerabilities in WordPad and Office Text Converters Could Allow Remote Code Execution (960477)

Published: | Updated:

Version: 1.3

General Information

Executive Summary

This security update resolves two publicly disclosed vulnerabilities and two privately reported vulnerabilities in Microsoft WordPad and Microsoft Office text converters. The vulnerabilities could allow remote code execution if a specially crafted file is opened in WordPad or Microsoft Office Word. Do not open Microsoft Office, RTF, Write, or WordPerfect files from untrusted sources using affected versions of WordPad or Microsoft Office Word.

This security update is rated Critical for supported editions of Microsoft Office Word 2000. This security update is also rated Important for supported editions of Microsoft Office Word 2002; Microsoft Office Converter Pack; and WordPad on all supported editions of Microsoft Windows 2000, Windows XP, and Windows Server 2003. For more information, see the subsection, Affected and Non-Affected Software, in this section.

This security update addresses the vulnerabilities by modifying the way that Microsoft Office Word and Office text converters handle opening specially crafted Word 6.0, Windows Write, and WordPerfect documents. This security update also addresses the vulnerabilities by implementing fixes to WordPad and by preventing WordPad on affected platforms from opening Word 6.0 and Windows Write 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.

This security update also addresses the vulnerability first described in Microsoft Security Advisory 960906.

Recommendation. Microsoft recommends that customers apply the update immediately.

Known Issues. Microsoft Knowledge Base Article 960477 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues.

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

Windows Operating System and Components

Operating SystemComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Windows 2000 Service Pack 4
(KB923561)
Not applicableRemote Code ExecutionImportantNone
Windows XP Service Pack 2 and Windows XP Service Pack 3
(KB923561)
Not applicableRemote Code ExecutionImportantNone
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2
(KB923561)
Not applicableRemote Code ExecutionImportantNone
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
(KB923561)
Not applicableRemote Code ExecutionImportantNone
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2
(KB923561)
Not applicableRemote Code ExecutionImportantNone
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems
(KB923561)
Not applicableRemote Code ExecutionImportantNone

Microsoft Office

Office Suite and Other SoftwareComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Office Suites and Components
Microsoft Office 2000 Service Pack 3Microsoft Office Word 2000 Service Pack 3
(KB921606)
Remote Code ExecutionCriticalMS04-027
Microsoft Office XP Service Pack 3Microsoft Office Word 2002 Service Pack 3
(KB933399)
Remote Code ExecutionImportantMS04-027
Other Office Software
Microsoft Office Converter Pack
(KB960476)
Not applicableRemote Code ExecutionImportantMS08-044

Non-Affected Software

Windows Operating System
Windows Vista and Windows Vista Service Pack 1
Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1
Windows Server 2008 for 32-bit Systems
Windows Server 2008 for x64-based Systems
Windows Server 2008 for Itanium-based Systems
Office and Other Software
Microsoft Office Word 2003 Service Pack 3
Microsoft Office Word 2007 Service Pack 1
Microsoft Office Word Viewer 2003 Service Pack 3
Microsoft Office Word Viewer
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 1
Microsoft Office 2004 for Mac
Microsoft Office 2008 for Mac
Open XML File Format Converter for Mac
Microsoft Works 8.0
Microsoft Works 8.5
Microsoft Works 9.0
Microsoft Works Suite 2006

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

WordPad and Office Text Converter Memory Corruption Vulnerability - CVE-2009-0087

WordPad Word 97 Text Converter Stack Overflow Vulnerability - CVE-2008-4841

Word 2000 WordPerfect 6.x Converter Stack Corruption Vulnerability - CVE-2009-0088

WordPad Word 97 Text Converter Stack Overflow Vulnerability - CVE-2009-0235

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:

  • Sean Larsson and Jun Mao of VeriSign iDefense Labs for reporting the WordPad Word 97 Text Converter Stack Overflow Vulnerability - CVE-2009-0235 (CVE-2009-0235)
  • A researcher with Fortinet’s FortiGuard Global Security Research Team for reporting the WordPad and Office Text Converter Memory Corruption Vulnerability (CVE-2009-0087)
  • A researcher with VeriSign iDefense Labs for reporting the Word 2000 WordPerfect 6.x Converter Stack Corruption Vulnerability (CVE-2009-0088)

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 (April 14, 2009): Bulletin published.
  • V1.1 (April 16, 2009): Added a warning message to the workarounds for disabling the converters, stating you must undo the workaround before installing this security update. This is an informational change only.
  • V1.2 (May 20, 2009): Added entry to the section, Frequently Asked Questions (FAQ) Related to This Security Update, to communicate that the associated Microsoft Knowledge Base Article 921606 and Microsoft Knowledge Base Article 933399 have been updated with regards to the expected installation behavior for certain update files. This is an informational change only.
  • V1.3 (June 17, 2009): Corrected bulletin replacement for the Microsoft Office Converter Pack (KB960476) update package. This is an informational change only. Customers who have already successfully installed the update do not need to reinstall.