/usr/lib/x86_64-linux-gnu/libdunecommon.so is in libdune-common-dev 2.2.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdunecommon-2.2.1.so
/usr/lib/x86_64-linux-gnu/libdunecommon-2.2.1.so