Microsoft Security Bulletin MS08-068 - Important
Vulnerability in SMB Could Allow Remote Code Execution (957097)

URL : http://www.microsoft.com/technet/security/bulletin/MS08-068.mspx#ENB

Published: November 11, 2008

Version: 1.0

Executive Summary

This security update resolves a publicly disclosed vulnerability in Microsoft Server Message Block (SMB) Protocol. The vulnerability could allow remote code execution on affected systems. An attacker who successfully exploited this vulnerability could install programs; view, change, or delete data; or create new accounts with full user rights. 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 security update is rated Important 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 vulnerability by modifying the way that SMB authentication replies are validated to prevent the replay of credentials. 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 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.(http://support.microsoft.com/common/international.aspx?RDPATH=gp;%5Bln%5D;lifecycle)