/usr/lib/libgimpbase-2.0.so is in libgimp2.0-dev 2.8.10-0ubuntu1.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libgimpbase-2.0.so.0.800.10
/usr/lib/libgimpbase-2.0.so.0.800.10