In ImageMagick 7.0.6-6, a memory exhaustion vulnerability was found in the function ReadTIFFImage, which allows attackers to cause a denial of service.
https://usn.ubuntu.com/4034-1/
https://lists.debian.org/debian-lts-announce/2020/08/msg00030.html