Off-by-one error in the GpFont::SetData function in gdiplus.dll in Microsoft GDI+ on Windows XP allows remote attackers to cause a denial of service (stack corruption and application termination) via a crafted EMF file that triggers an integer overflow, as demonstrated by voltage-exploit.emf, aka the "Microsoft GdiPlus EMF GpFont.SetData integer overflow."

More... (http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-1217)