The ExportAlphaQuantumType function in export.c in GraphicsMagick before 1.3.18 might allow remote attackers to cause a denial of service (crash) via vectors related to exporting the alpha of an 8-bit RGBA image.
lists.fedoraproject.org/pipermail/package-announce/2013-November/120008.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00032.html
secunia.com/advisories/55288
secunia.com/advisories/55721
security.gentoo.org/glsa/glsa-201311-10.xml
sourceforge.net/p/graphicsmagick/code/ci/1a2d7a38363f7f23b63d626887d22d39c7240144/
sourceforge.net/p/graphicsmagick/discussion/250737/thread/20888e8b/
www.openwall.com/lists/oss-security/2013/11/15/14
www.securityfocus.com/bid/63002
bugzilla.redhat.com/show_bug.cgi?id=1019085