The Perforce service (p4s.exe) in Perforce Server 2007.3/143793 and earlier allows remote attackers to cause a denial of service (daemon crash) via a missing parameter to the (1) dm-FaultFile (2) dm-LazyCheck (3) dm-ResolvedFile (4) dm-OpenFile (5) crypto and possibly unspecified other commands which triggers a NULL pointer dereference.