CVE-2020-27756

In ParseMetaGeometry() of MagickCore/geometry.c, image height and width
calculations can lead to divide-by-zero conditions which also lead to
undefined behavior. This flaw can be triggered by a crafted input file
processed by ImageMagick and could impact application availability. The
patch uses multiplication in addition to the function
PerceptibleReciprocal() in order to prevent such divide-by-zero
conditions. This flaw affects ImageMagick versions prior to 7.0.9-0.

Bugs

• <https://github.com/ImageMagick/ImageMagick/issues/1725&gt;