Microsoft Security Bulletin MS07-058 - Important

Vulnerability in RPC Could Allow Denial of Service (933729)

Published: | Updated:

Version: 1.1

General Information

Executive Summary

This update resolves a privately reported vulnerability. A denial of service vulnerability exists in the remote procedure call (RPC) facility due to a failure in communicating with the NTLM security provider when performing authentication of RPC requests. The vulnerability is documented in its own subsection in the Vulnerability Details section of this bulletin.

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

This security update addresses the vulnerability by validating the RPC request. 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 at the earliest opportunity.

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

SoftwareMaximum Security ImpactAggregate Severity RatingBulletins Replaced by This Update
Microsoft Windows 2000 Service Pack 4Information DisclosureLowMS06-031
Windows XP Service Pack 2Denial of ServiceImportantNone
Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2Denial of ServiceImportantNone
Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2Denial of ServiceImportant None
Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2Denial of ServiceImportantNone
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based SystemsDenial of ServiceImportantNone
Windows VistaDenial of ServiceImportantNone
Windows Vista x64 EditionDenial of ServiceImportantNone

Frequently Asked Questions (FAQ) Related to This Security Update

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

RPC Authentication Vulnerability Could Allow Denial of Service - CVE-2007-2228

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:

  • Zero Day Initiative for reporting the Windows RPC Authentication Vulnerability (CVE-2007-2228).

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 9, 2007): Bulletin published.
  • V1.1 (October 10, 2007): Updating bulletin to show XP professional x64 Edition Service Pack 2 as affected software.