The png coder in ImageMagick allows remote attackers to cause a denial of service (crash).
https://bugzilla.redhat.com/show_bug.cgi?id=1343509
http://www.ubuntu.com/usn/USN-3131-1
http://www.openwall.com/lists/oss-security/2016/06/02/13
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00002.html