Folks, just in case you've not picked this up elsewhere you should know that we have released an out of band security update. As you know this isn't usual and therefore you should carefully review the information here. It's worth noting that for Windows XP and Windows Server 2003 this is a Critical level patch, whilst for Vista and Windows Server 2008 this is an important release. I appreciate this isn't the time or place but this does support the 'secure by design' implemented in Vista and Server 2008 as detailed in this article.
Here is some general information:
This security update resolves a privately reported vulnerability in the Server service. The vulnerability could allow remote code execution if an affected system received a specially crafted RPC request. On Microsoft Windows 2000, Windows XP, and Windows Server 2003 systems, an attacker could exploit this vulnerability without authentication to run arbitrary code. It is possible that this vulnerability could be used in the crafting of a wormable exploit. Firewall best practices and standard default firewall configurations can help protect network resources from attacks that originate outside the enterprise perimeter.
This security update is rated Critical for all supported editions of Microsoft Windows 2000, Windows XP, Windows Server 2003, and rated Important 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 correcting the way that the Server service handles RPC 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.
Webcast on Security Bulletin
Join us for a brief overview of the technical details of the security bulletin. The intent of this webcast is to address your concerns. Therefore, most of the webcast is devoted to attendees asking questions about the bulletin and getting answers from our security experts.
Register: TechNet Webcast: Information Regarding an Out-of-Band Security Bulletin Release (Level 200).