/usr/lib/x86_64-linux-gnu/liberis-1.3.so.21 is in liberis-1.3-21 1.3.23-6ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liberis-1.3.so.21.0.0
/usr/lib/x86_64-linux-gnu/liberis-1.3.so.21.0.0