/usr/lib/x86_64-linux-gnu/libvibnet.so.6 is in libvibrant6b 6.1.20120620-10.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvibnet.so.6.1.20120620
/usr/lib/x86_64-linux-gnu/libvibnet.so.6.1.20120620