It was discovered that graphicsmagick was subject to vulnerabilites. * heap-based buffer overflow in the WriteTGAImage function of tga.c (CVE-2018-20184). * denial of service vulnerability in ReadDIBImage function of coders/dib.c (CVE-2018-20189). * heap-based buffer over-read in the ReadBMPImage function of bmp.c (CVE-2018-20185).