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Microsoft Security Bulletin MS08-001 - Critical

Vulnerabilities in Windows TCP/IP Could Allow Remote Code Execution (941644)

Published: | Updated:

Version: 3.0

General Information

Executive Summary

This critical security update resolves two privately reported vulnerabilities in Transmission Control Protocol/Internet Protocol (TCP/IP) processing. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

This is a critical security update for all supported editions of Windows XP and Windows Vista, an important security update for all supported editions of Windows Server 2003, and a moderate security update for all supported editions of Microsoft Windows 2000. For more information, see the subsection, Affected and Non-Affected Software, in this section.

This security update addresses the vulnerability by modifying the way that the Windows kernel processes TCP/IP structures that contain multicast and ICMP requests. 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 immediately

Known Issues. None

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

SoftwareMaximum Security ImpactAggregate Severity RatingBulletins Replaced by This Update
Microsoft Windows 2000 Service Pack 4Denial of ServiceModerateMS06-032
Windows XP Service Pack 2Remote Code ExecutionCriticalMS06-032
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2Remote Code ExecutionCriticalMS06-032
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2Remote Code ExecutionImportantMS06-032
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2Remote Code ExecutionImportantMS06-032
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based SystemsRemote Code ExecutionImportantMS06-032
Windows Small Business Server 2003 Service Pack 1, Windows Small Business Server 2003 R2, Windows Small Business Server 2003 R2 Service Pack 2, and Windows Home ServerRemote Code ExecutionCriticalNone
Windows VistaRemote Code ExecutionCriticalNone
Windows Vista x64 EditionRemote Code ExecutionCriticalNone

Note: Supported editions of Windows Small Business Server 2003 and Windows Home Server contain the same affected code as Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2. However, for the Windows Kernel TCP/IP/IGMPv3 and MLDv2 Vulnerability (CVE-2007-0069), default configurations of Windows Small Business Server 2003 and Windows Home Server have a greater exposure to the same vulnerability and therefore merit a severity rating of Critical.

For additional details about the default configuration of Windows Server 2003 Service Pack 1, Windows Server 2003 Service Pack 2, Windows Small Business Server 2003 Service Pack 1, Windows Small Business Server 2003 R2, Windows Small Business Server 2003 R2 Service Pack 2, and Windows Home Server, see the FAQ in the Vulnerability Information section.

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Windows Kernel TCP/IP/IGMPv3 and MLDv2 Vulnerability - CVE-2007-0069

Windows Kernel TCP/IP/ICMP Vulnerability - CVE-2007-0066

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:

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 (January 8, 2008): Bulletin published.
  • V2.0 (January 23, 2008): Bulletin updated to add Windows Small Business Server 2003 Service Pack 2 as an affected product. Also added an FAQ to clarify that current Microsoft detection and deployment tools already correctly offer the update to Windows Small Business Server 2003 Service Pack 2 customers.
  • V3.0 (January 25 2008): This bulletin was revised to clarify the impact of Windows Kernel TCP/IP/IGMPv3 and MLDv2 Vulnerability (CVE-2007-0069) on supported editions of Windows Small Business Server 2003 and Windows Home Server. Also included is an explanation and clarification that current Microsoft detection and deployment tools already correctly offer the update to systems running Windows Small Business Server 2003 and Windows Home Server.