Security update for GraphicsMagick

Open Source Vulnerabilities SUSE-SU-2018:1036-1

This update for GraphicsMagick fixes the following issues: - security update (png.c) * CVE-2018-9018: divide-by-zero in the ReadMNGImage function of coders/png.c. Attackers could leverage this vulnerability to cause a crash and denial of service via a crafted mng file. [bsc#1086773] - security update (gif.c) * CVE-2017-18254: A memory leak vulnerability was found in the function WriteGIFImage in coders/gif.c, which could lead to denial of service via a crafted file. [bsc#1087027] - security update (pcd.c) * CVE-2017-18251: A memory leak vulnerability was found in the function ReadPCDImage in coders/pcd.c, which could lead to a denial of service via a crafted file. [bsc#1087037]