When ImageMagick 7.0.6-1 processes a crafted file in convert, it can lead to a heap-based buffer over-read in the WriteCIPImage() function in coders/cip.c, related to the GetPixelLuma function in MagickCore/pixel-accessor.h.
https://www.debian.org/security/2018/dsa-4204
https://www.debian.org/security/2017/dsa-4019
https://usn.ubuntu.com/3681-1/