The ReadSCTImage function in coders/sct.c in GraphicsMagick 1.3.25 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted SCT header.
hg.code.sf.net/p/graphicsmagick/code/rev/0a0dfa81906d
lists.opensuse.org/opensuse-updates/2016-10/msg00094.html
www.debian.org/security/2016/dsa-3746
www.openwall.com/lists/oss-security/2016/10/16/6
www.securityfocus.com/bid/93597
blogs.gentoo.org/ago/2016/09/15/graphicsmagick-stack-based-buffer-overflow-in-readsctimage-sct-c/
bugzilla.redhat.com/show_bug.cgi?id=1385583