The ReadHDRImage function in coders/hdr.c in ImageMagick 6.x and 7.x allows remote attackers to cause a denial of service (infinite loop) via a crafted HDR file.
trac.imagemagick.org/changeset/17845
trac.imagemagick.org/changeset/17846
www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=26929
www.openwall.com/lists/oss-security/2015/02/26/13
www.openwall.com/lists/oss-security/2016/06/06/2
bugzilla.redhat.com/show_bug.cgi?id=1195260
github.com/ImageMagick/ImageMagick/commit/97aa7d7cfd2027f6ba7ce42caf8b798541b9cdc6