ImageMagick is a collection of tools and libraries for manipulating a wide variety of image formats.
Tavis Ormandy of the Gentoo Linux Security Audit Team has identified a flaw in the handling of filenames by the ImageMagick utilities.
Successful exploitation may disrupt web applications that depend on ImageMagick for image processing, potentially executing arbitrary code.
There is no known workaround at this time.
All ImageMagick users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/imagemagick-6.2.0.4"