ImageMagick before 6.9.12-91 allows attackers to cause a denial of service (memory consumption) in Magick::Draw.
https://github.com/rmagick/rmagick/pull/1406/files
https://github.com/ImageMagick/ImageMagick6/compare/6.9.12-90...6.9.12-91
https://github.com/ImageMagick/ImageMagick6/commit/c90e79b3b22fec309cab55af2ee606f71b027b12