ImageMagick 7.0.6-1 has a memory exhaustion vulnerability in ReadOneJNGImage in coders\png.c.
https://usn.ubuntu.com/3681-1/
https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00015.html
https://github.com/ImageMagick/ImageMagick/issues/549
https://github.com/ImageMagick/ImageMagick/commit/d9ccd8227c4c88a907cda5278408b73552cb0c07