/usr/lib/libvorbisidec.so is in libvorbisidec-dev 1.0.2+svn18153-0.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libvorbisidec.so.1.0.3
/usr/lib/libvorbisidec.so.1.0.3