/usr/lib/x86_64-linux-gnu/libmodglue.so is in libmodglue1-dev 1.17-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libmodglue.so.1.0.17
/usr/lib/x86_64-linux-gnu/libmodglue.so.1.0.17