ImageTragick issue: how to verify images and documents to protect from renamed malicious files

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Yesterday, the critical security flaw revealed in the popular ImageMagick image processing package. The secury issue allows to execute the code by passing a specifically modified image. This is a serious threat for any service that relies on ImageMagick should protect their installation as soon as possible. The site dedicated to this “ImageTragick” issue advises to “If you use ImageMagick