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Microsoft Security Bulletin MS09-001 - Critical

Vulnerabilities in SMB Could Allow Remote Code Execution (958687)

Published:

Version: 1.0

General Information

Executive Summary

This security update resolves two privately reported vulnerabilities and one publicly disclosed vulnerability in Microsoft Server Message Block (SMB) Protocol. The vulnerabilities could allow remote code execution on affected systems. An attacker who successfully exploited these vulnerabilities could install programs; view, change, or delete data; or create new accounts with full user rights. Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed.

This security update is rated Critical for all supported editions of Microsoft Windows 2000, Windows XP, and Windows Server 2003, and Moderate for all supported editions of Windows Vista, and Windows Server 2008. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerabilities by validating the fields inside the SMB packets. 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 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

Operating SystemMaximum Security ImpactAggregate Severity RatingBulletins Replaced by this Update
Microsoft Windows 2000 Service Pack 4Remote Code ExecutionCriticalMS08-063
Windows XP Service Pack 2 and Windows XP Service Pack 3Remote Code ExecutionCriticalMS08-063
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2Remote Code ExecutionCriticalMS08-063
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2Remote Code ExecutionCriticalMS08-063
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2Remote Code ExecutionCriticalMS08-063
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based SystemsRemote Code ExecutionCriticalMS08-063
Windows Vista and Windows Vista Service Pack 1Remote Code ExecutionModerateMS08-063
Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1Remote Code ExecutionModerateMS08-063
Windows Server 2008 for 32-bit Systems*Remote Code ExecutionModerateMS08-063
Windows Server 2008 for x64-based Systems*Remote Code ExecutionModerateMS08-063
Windows Server 2008 for Itanium-based SystemsRemote Code ExecutionModerateMS08-063

*Windows Server 2008 server core installation affected. For supported editions of Windows Server 2008, this update applies, with the same severity rating, whether or not Windows Server 2008 was installed using the Server Core installation option. For more information on this installation option, see Server Core. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008; see Compare Server Core Installation Options.

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

SMB Buffer Overflow Remote Code Execution Vulnerability - CVE-2008-4834

SMB Validation Remote Code Execution Vulnerability - CVE-2008-4835

SMB Validation Denial of Service Vulnerability - CVE-2008-4114

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:

  • An anonymous researcher, working with TippingPoint and the Zero Day Initiative, for reporting the SMB Buffer Overflow Remote Code Execution Vulnerability (CVE-2008-4834)
  • An anonymous researcher, working with TippingPoint and the Zero Day Initiative, for reporting the SMB Validation Remote Code Execution Vulnerability (CVE-2008-4835)

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 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 13, 2009): Bulletin published.