Update your /etc/ImageMagick/policy.xml file so that it contains the code taken from http://imagetragick.com and restart corresponding daemons.
You're safe now. The full fix is still being worked out.
And if you have the old version of ImageMagick (because you are on CentOS 5, for example) which doesn't support policy.xml, you can edit delegates.xml, by removing all delegates just to be safe. The file will be somewhere around: /usr/lib64/ImageMagick-6.2.8/config/
In a terminal type
and the ImageMagick native GUI appears.
If you want to create an application luncher with the logo then the icon is in the folder