The gen_class_pod implementation in lib/Config/Model/Utils/GenClassPod.pm in Config-Model (aka libconfig-model-perl) before 2.102 has a dangerous "use lib" line, which allows remote attackers to have an unspecified impact via a crafted Debian package file.
https://security-tracker.debian.org/tracker/CVE-2017-0373
http://cpansearch.perl.org/src/DDUMONT/Config-Model-2.102/Changes