The functions ReadDCMImage in coders/dcm.c ReadPWPImage in coders/pwp.c ReadCALSImage in coders/cals.c and ReadPICTImage in coders/pict.c in ImageMagick 7.0.8-4 do not check the return value of the fputc function which allows remote attackers to cause a denial of service via a crafted image file.