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.
Recommendation. Microsoft recommends that customers apply the update immediately.
- Microsoft Windows 2000 Service Pack 4
- Windows XP Service Pack 2
- Windows XP Service Pack 3
- Windows XP Professional x64 Edition
- Windows XP Professional x64 Edition Service Pack 2
- Windows Server 2003 Service Pack 1
- Windows Server 2003 Service Pack 2
- Windows Server 2003 x64 Edition
- Windows Server 2003 x64 Edition Service Pack 2
- Windows Server 2003 with SP1 for Itanium-based Systems
- Windows Server 2003 with SP2 for Itanium-based Systems
- Windows Vista and Windows Vista Service Pack 1
- Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1
- Windows Server 2008 for 32-bit Systems*
- Windows Server 2008 for x64-based Systems*
- Windows Server 2008 for Itanium-based Systems
*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.