PNP_GetDeviceList (upnp_getdevicelist) in UPnP for Microsoft Windows 2000 SP4 and earlier and possibly Windows XP SP1 and earlier allows remote attackers to cause a denial of service (memory consumption) via a DCE RPC request that specifies a large output buffer size a variant of CVE-2006-6296 and a different vulnerability than CVE-2005-2120.