In GraphicsMagick 1.3.28, there is a divide-by-zero in the ReadMNGImage function of coders/png.c. Remote attackers could leverage this vulnerability to cause a crash and denial of service via a crafted mng file.
www.securityfocus.com/bid/103526
lists.debian.org/debian-lts-announce/2018/03/msg00025.html
lists.debian.org/debian-lts-announce/2018/08/msg00002.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3IYH7QSNXXOIDFTYLY455ANZ3JWQ7FCS/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FS76VNCFL3FVRMGXQEMHBOKA7EE46BTS/
sourceforge.net/p/graphicsmagick/bugs/554/
www.debian.org/security/2018/dsa-4321