The Server service in Microsoft Windows 2000 SP4 XP SP2 and SP3 Server 2003 SP1 and SP2 Vista Gold and SP1 Server 2008 and 7 Pre-Beta allows remote attackers to execute arbitrary code via a crafted RPC request that triggers the overflow during path canonicalization as exploited in the wild by Gimmiv.A in October 2008 aka \Server Service Vulnerability.\