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Microsoft Security Bulletin MS07-056 - Critical

Security Update for Outlook Express and Windows Mail (941202)

Published: | Updated:

Version: 2.0

General Information

Executive Summary

This critical security update resolves one privately reported vulnerability. The vulnerability could allow remote code execution due to an incorrectly handled malformed NNTP response. An attacker could exploit the vulnerability by constructing a specially crafted Web page.

This is a critical security update for all supported versions of Microsoft Outlook express and Microsoft Windows Mail. For more information, see the subsection, Affected and Non-Affected Software, in this section.

This security update removes the vulnerability by changing the newsgroup client to handle malformed responses correctly. 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. Microsoft recommends that customers apply the update immediately.

Known Issues. None

Affected and Non-Affected Software

The software listed here 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

Operating SystemComponentMaximum Security ImpactSeverity RatingBulletins Replaced by This Update
Microsoft Windows 2000 Service Pack 4Outlook Express 5.5 Service Pack 2Remote Code ExecutionCriticalMS06-076
Microsoft Windows 2000 Service Pack 4Outlook Express 6 Service Pack 1Remote Code ExecutionCriticalMS06-076
Windows XP Service Pack 2Microsoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2Microsoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows Server 2003 Service Pack 1Microsoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows Server 2003 Service Pack 2Microsoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows Server 2003 x64 EditionMicrosoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows Server 2003 x64 Edition Service Pack 2Microsoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows Server 2003 with SP1 for Itanium-based SystemsMicrosoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows Server 2003 with SP2 for Itanium-based SystemsMicrosoft Outlook Express 6Remote Code ExecutionCriticalNot Applicable
Windows VistaWindows MailRemote Code ExecutionImportantNot Applicable
Windows Vista x64 EditionWindows MailRemote Code ExecutionImportantNot Applicable

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Network News Transfer Protocol Memory Corruption Vulnerability – CVE-2007-3897

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:

  • Greg MacManus of VeriSign iDefense Labs for reporting the Network News Transfer Protocol Memory Corruption Vulnerability – CVE-2007-3897.

Support

  • Customers in the U.S. and Canada can receive technical support from Microsoft Product Support Services at 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates.
  • 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 09, 2007): Bulletin published.
  • V2.0 (October 10, 2007): Bulletin revised to include Windows XP Professional x64 Edition in the "Affected Software" section; Known Issues set to none; Corrected missing file information to the bulletin text for Outlook Express 6.0 Service Pack 1 on Windows 2000 Service pack 4 and Outlook Express 5.5 Service Pack 2 on Windows 2000 Service pack 4.