imagemagick - security update

Several issues have been discovered in ImageMagick, a popular set of
programs and libraries for image manipulation. These issues include
several problems in memory handling that can result in a denial of
service attack or in execution of arbitrary code by an attacker with
control on the image input.

For the stable distribution (jessie), these problems have been fixed in
version 8:6.8.9.9-5+deb8u6.

For the unstable distribution (sid), these problems have been fixed in
version 8:6.9.6.5+dfsg-1.

We recommend that you upgrade your imagemagick packages.