The gnuplot delegate functionality in ImageMagick before 6.9.4-0 and GraphicsMagick allows remote attackers to execute arbitrary commands via unspecified vectors.
https://lists.debian.org/debian-lts-announce/2018/08/msg00002.html
https://access.redhat.com/errata/RHSA-2016:1237
http://www.securityfocus.com/bid/91018
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.openwall.com/lists/oss-security/2016/06/02/13
http://git.imagemagick.org/repos/ImageMagick/commit/70a2cf326ed32bedee144b961005c63846541a16