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Microsoft Security Bulletin MS07-034 - Critical

Cumulative Security Update for Outlook Express and Windows Mail (929123)

Published: | Updated:

Version: 1.3

General Information

Executive Summary

This critical security update resolves two privately reported and two publicly disclosed vulnerabilities. One of these vulnerabilities could allow remote code execution if a user viewed a specially crafted e-mail using Windows Mail in Windows Vista. The other vulnerabilities could allow information disclosure if a user visits a specially crafted Web page using Internet Explorer and cannot be exploited directly in Outlook Express. For the information disclosure vulnerabilities, 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 is a critical security update for supported editions of Windows Vista. For other versions of Windows, this update is rated important or moderate or low. For more information, see the subsection, Affected and Non-Affected Software, in this section.

This security update addresses these vulnerabilities by changing the MHTML protocol handler in Windows so that it securely handles MHTML URLs in redirection scenarios and scenarios involving ambiguously typed content. 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. Microsoft Knowledge Base Article 929123 documents the currently known issues that customers may experience when they install this security update. The article also documents recommended solutions for these issues.

Affected and Non-Affected Software

The software listed here 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, visit Microsoft Support Lifecycle.

Affected Software

Operating SystemComponentMaximum Security ImpactAggregate Severity RatingBulletins Replaced by This Update
Windows XP Service Pack 2Microsoft Outlook Express 6Information DisclosureImportantMS06-016

MS06-043

MS06-076

Windows XP Professional x64 EditionMicrosoft Outlook Express 6Information DisclosureImportantMS06-016

MS06-043

MS06-076

Windows XP Professional x64 Edition Service Pack 2Microsoft Outlook Express 6Information DisclosureImportantNone
Windows Server 2003 Service Pack 1Microsoft Outlook Express 6Information DisclosureLowMS06-016

MS06-043

MS06-076

Windows Server 2003 Service Pack 2Microsoft Outlook Express 6Information DisclosureLowNone
Windows Server 2003 x64 EditionMicrosoft Outlook Express 6Information DisclosureModerateMS06-016

MS06-043

MS06-076

Windows Server 2003 x64 Edition Service Pack 2Microsoft Outlook Express 6Information DisclosureModerateNone
Windows Server 2003 with SP1 for Itanium-based SystemsMicrosoft Outlook Express 6Information DisclosureLowMS06-016

MS06-043

MS06-076

Windows Server 2003 with SP2 for Itanium-based SystemsMicrosoft Outlook Express 6Information DisclosureLowNone
Windows VistaWindows MailRemote Code ExecutionCriticalNone
Windows Vista x64 EditionWindows MailRemote Code ExecutionCriticalNone

Non-Affected Software

Operating SystemComponent
Windows 2000 Service Pack 4Outlook Express 5.5 Service Pack 2
Windows 2000 Service Pack 4Outlook Express 6 Service Pack 1

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

URL Redirect Cross Domain Information Disclosure Vulnerability - CVE-2006-2111

Windows Mail UNC Navigation Request Remote Code Execution Vulnerability - CVE-2007-1658

URL Parsing Cross Domain Information Disclosure Vulnerability - CVE-2007-2225

Content Disposition Parsing Cross Domain Information Disclosure Vulnerability - CVE-2007-2227

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:

  • SANS ISC for working with us on the URL Redirect Vulnerability in MHTML Protocol Handler via Internet Explorer (CVE-2007-2225).
  • HASEGAWA Yosuke of webappsec.jp for reporting the MHTML Prefix Vulnerability Allows Unauthorized Script via Internet Explorer (CVE-2007-2227).

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 (June 12, 2007): Bulletin published.
  • V1.1 (June 12, 2007): Updated Affected Software section to remove Bulletins Replaced by This Update on Windows XP Professional x64 Edition Service Pack 2.
  • V1.2 (June 12, 2007): Updated registry key verification information for Outlook Express 6 in the Security Update Deployment section.
  • V1.3 (June 13, 2007): Updated the Microsoft Knowledge Base Article to reference KB Article 929123 in the Known Issues section.