File ImageMagick-CVE-2020-27756.patch of Package ImageMagick.24648
Index: ImageMagick-7.0.7-34/MagickCore/geometry.c
===================================================================
--- ImageMagick-7.0.7-34.orig/MagickCore/geometry.c 2018-05-20 17:55:43.000000000 +0200
+++ ImageMagick-7.0.7-34/MagickCore/geometry.c 2020-12-09 16:17:47.833895846 +0100
@@ -1409,13 +1409,13 @@ MagickExport MagickStatusType ParseMetaG
if (geometry_ratio >= image_ratio)
{
*width=former_width;
- *height=(size_t) floor((double) (former_height*image_ratio/
- geometry_ratio)+0.5);
+ *height=(size_t) floor((double) (PerceptibleReciprocal(
+ geometry_ratio)*former_height*image_ratio)+0.5);
}
else
{
- *width=(size_t) floor((double) (former_width*geometry_ratio/
- image_ratio)+0.5);
+ *width=(size_t) floor((double) (PerceptibleReciprocal(
+ image_ratio)*former_width*geometry_ratio)+0.5);
*height=former_height;
}
former_width=(*width);