The Distributed File System (DFS) implementation in Microsoft Windows XP SP2 and SP3 Windows Server 2003 SP2 Windows Vista SP1 and SP2 Windows Server 2008 Gold SP2 R2 and R2 SP1 and Windows 7 Gold and SP1 allows remote DFS servers to cause a denial of service (system hang) via a crafted referral response aka \DFS Referral Response Vulnerability.\