ImageMagick before 7.0.7-12 has a coders/png.c Magick_png_read_raw_profile heap-based buffer over-read via a crafted file, related to ReadOneMNGImage.
https://www.debian.org/security/2018/dsa-4204
https://www.debian.org/security/2017/dsa-4074
https://usn.ubuntu.com/3681-1/
https://lists.debian.org/debian-lts-announce/2018/01/msg00000.html