Heap-based buffer overflow in the CreateDIBPatternBrushPt function in GDI in Microsoft Windows 2000 SP4, XP SP2, Server 2003 SP1 and SP2, Vista, and Server 2008 allows remote attackers to execute arbitrary code via an EMF or WMF image file with a malformed header that triggers an integer overflow, aka "GDI Heap Overflow Vulnerability."