Univention Corporate Server 4.1 erratum 185 (security)

This update fixes several vulnerabilities in ImageMagick. These
vulnerabilities, collectively known as ImageTragick, are the consequence of
lack of sanitization of untrusted input. An attacker with control on the
image input could, with the privileges of the user running the application,
execute code (CVE-2016-3714), make HTTP GET or FTP requests (CVE-2016-3718),
or delete (CVE-2016-3715), move (CVE-2016-3716), or read (CVE-2016-3717)
local files.