Debian 10 Buster DLA-3357-2: Imagemagick Moderate Regression Fix

The previous Imagemagick security update caused a regression in some
perl packages due to overly restrictive hardening in a policy update
(reading from /etc/ was forbidden). This hardening patch has been
removed.

For Debian 10 buster, this problem has been fixed in version
8:6.9.10.23+dfsg-2.1+deb10u4.

We recommend that you upgrade your imagemagick packages.

For the detailed security status of imagemagick please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/imagemagick

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS