ImageMagick: denial of service in ReadXWDImage in coders/xwd.c in the XWD image parsing component

ReadXWDImage in coders/xwd.c in the XWD image parsing component of ImageMagick 7.0.8-41 Q16 allows attackers to cause a denial-of-service divide-by-zero error by crafting an XWD image file in which the header indicates neither LSB first nor MSB first...